1. An infusion tube quality detection system, comprising:

the infusion tube detection device comprises a sliding table, a detection unit and a detection unit, wherein a puncture needle is arranged on the sliding table, one end of the puncture needle is connected with a tension sensor, and the sliding table is located at an initial position when the infusion tube to be detected is not connected;

the sliding rail is arranged below the sliding table, and the sliding table can slide along the sliding rail;

the motor is arranged on the sliding table and used for driving the sliding table to slide along the sliding rail, and a displacement sensor is arranged on the motor;

the fixing table is provided with an inflation needle, the inflation needle is connected with an inflation pump through an inflation pipeline, and the inflation pipeline is provided with an air pressure sensor;

the image acquisition device is arranged on one side of the sliding rail, and an infrared imaging probe is arranged on the image acquisition device;

the locking ring is used for locking the infusion tube to be detected;

the central control module is respectively connected with the tension sensor, the motor, the air pressure sensor, the displacement sensor, the inflator pump and the image acquisition device;

when the infusion tube quality detection system is used for detecting the infusion tube, firstly, the infusion tube to be detected is fixed to a detection device, after the fixation is completed, the infusion tube to be detected is inflated through the inflation needle by the inflation pump, when the inflation pressure reaches the standard, the image acquisition device performs image detection on the infusion tube to be detected, the central control module analyzes the detected image, and the jumping tolerance of the infusion tube in the infusion tube to be detected and the minimum difference value between the inner diameter of the infusion tube and the outer diameter of the infusion tube are determined; the central control module respectively analyzes and judges the jump tolerance, the minimum difference between the inner diameter of the infusion tube and the outer diameter of the infusion tube; after the jump tolerance, the minimum difference between the inner diameter of the infusion tube and the outer diameter of the infusion tube are judged to be qualified, the inflation pump inflates the infusion tube to be detected again through inflation so as to detect the leakproofness of the infusion tube.

2. The infusion tube quality detection system according to claim 1, wherein when the motor drives the sliding table to move on the sliding rail in a direction away from the fixed table, the displacement sensor records a moving distance L in real time and transmits recorded data to the central control module; the tension sensor detects tension F borne by the puncture needle in a displacement process in real time and transmits detected tension data to the central control module in real time;

a tension evaluation parameter Fz is arranged in the central control module, the central control module compares the detected tension value F with the tension evaluation parameter Fz,

when F is less than Fz, the central control module judges that the infusion tube to be detected is not straightened, and the motor continues to drive the sliding table to move;

and when F is larger than or equal to Fz, the central control module judges that the infusion tube to be detected is straightened, and the central control module controls the motor to stop rotating.

3. The infusion tube quality detecting system according to claim 2, wherein when the slide table is in the initial position, the distance Lc between the slide table and the fixed table is set, the value of the tension evaluation parameter Fz is determined by the moving distance L, Fz = (L + Lc) × f, where f is a calculation parameter of the moving distance to the tension evaluation parameter.

4. The infusion tube quality detection system according to claim 3, wherein when the central control module determines that the infusion tube to be detected is straightened, the central control module controls the inflator to inflate the infusion tube to be detected through inflation, the air pressure sensor detects a pressure value P1 in the inflation pipeline and transmits a detection result to the central control module, a first standard pressure value Pb is preset in the central control module, the central control module compares the pressure value P with the first standard pressure value Pb,

when P1 is not more than Pb, the central control module controls the inflator pump to continue to inflate the infusion tube to be detected;

when P1 is greater than Pb, the central control module controls the inflator pump to stop inflating the infusion tube to be detected.

5. The infusion tube quality detection system according to claim 4, wherein there is a temperature difference between the gas in the inflator and the external detection environment of the infusion tube to be detected, when the external detection environment of the infusion tube to be detected is W, the gas temperature in the inflator is Wz, Wz is greater than or equal to W + Wx, wherein Wx is the minimum temperature difference between the gas in the inflator and the external environment.

6. The infusion tube quality detection system according to claim 5, wherein when P1 > Pb causes the central control module to control the inflator to stop inflating the infusion tube to be detected, the central control module controls the infrared imaging probe to perform image detection on the infusion tube to be detected, so as to obtain an image A of the infusion tube to be detected, and the infrared imaging probe transmits the obtained image A to the central control module;

the central control module analyzes the obtained data to obtain a jump tolerance B of the infusion tube in the infusion tube to be detected and a minimum difference C between the inner diameter of the infusion tube and the outer diameter of the infusion tube;

the central control module is internally provided with a run-out tolerance standard value Bz, the central control module compares the run-out tolerance B with the run-out tolerance standard value Bz,

when B is less than or equal to Bz, the central control module judges that the jumping tolerance of the infusion tube to be detected is qualified, and continues to perform next detection on the infusion tube to be detected;

and when B is larger than Bz, the central control module judges that the jumping tolerance of the infusion tube to be detected is unqualified, and the infusion tube to be detected is unqualified.

7. The infusion tube quality detection system according to claim 6, wherein a minimum difference standard value Cz between the inner diameter and the outer diameter of the infusion tube is further arranged in the central control module, when the central control module determines that the pulsation tolerance of the infusion tube to be detected is qualified, the central control module compares C with the minimum difference standard value Cz,

when C is less than or equal to Cz, the central control module judges that the minimum difference between the inner diameter of the infusion tube to be detected and the outer diameter of the infusion tube is qualified, and continues to perform next detection on the infusion tube to be detected;

and when C is larger than Cz, the central control module judges that the minimum difference between the inner diameter of the infusion tube to be detected and the outer diameter of the infusion tube is unqualified, and the infusion tube to be detected is unqualified.

8. The infusion tube quality detection system according to claim 7, wherein when the central control module determines that the minimum difference between the inner diameter of the infusion tube to be detected and the outer diameter of the infusion tube is qualified, the central control module controls the inflator pump to continue to inflate the infusion tube to be detected,

the air pressure sensor detects a pressure value P2 in the inflation pipeline and transmits the detection result to the central control module, a second standard pressure value Pc is preset in the central control module, the central control module compares the pressure value P with the second standard pressure value Pc,

when the P2 is not more than Pc, the central control module controls the inflator pump to continue to inflate the infusion tube to be detected;

when P2 is more than Pc, the central control module controls the inflator pump to stop inflating the infusion tube to be detected;

when the pressure value P2 is greater than Pc, the central control module controls the inflator pump to stop inflating the infusion tube to be detected and the detection time T is passed, the air pressure sensor detects a pressure value P2 'in the inflation pipeline and transmits the detection result to the central control module, and the central control module calculates a pressure value variation Px, wherein Px = P2-P2';

the central control module is internally provided with a pressure value variation standard value Pxz and compares the pressure value variation Px with the pressure value variation Pxz,

when the Px is less than or equal to the Pxz, the central control module judges that the infusion tube to be detected is good in sealing property;

and when Px is larger than Pxz, the central control module judges that the infusion tube to be detected has poor sealing performance and detects the infusion tube to be detected as an unqualified product.

9. The infusion tube quality detection system according to claim 8, wherein the pressure value variation criterion value Pxz is determined by a movement distance L, and Pxz = (L + Lc) × p, where p is a calculation parameter of the movement distance to the pressure value variation criterion value.

10. The infusion tube quality detection system according to claim 9, wherein when the central control module determines that the infusion tube to be detected has good sealability, the central control module calculates a score G of the infusion tube to be detected, wherein e is a score evaluation parameter of a jitter tolerance on the infusion tube, h is a score evaluation parameter of a minimum difference value between the inner diameter of the infusion tube and the outer diameter of the infusion tube to the infusion tube, and k is a score evaluation parameter of a pressure value variation amount on the infusion tube;

the central control module is internally provided with a first scoring parameter G1 of the infusion tube and a second scoring parameter G2 of the infusion tube, wherein G1 is less than G2, the central control module compares the score G with a first scoring parameter G1 of the infusion tube and a second scoring parameter G2 of the infusion tube,

when G is less than or equal to G1, the central control module judges that the infusion tube to be detected is unqualified;

when G is more than G1 and less than or equal to G2, the central control module judges that the infusion tube to be detected is qualified, and the infusion tube to be detected is in a secondary grade product;

and when G is larger than G2, the central control module judges that the infusion tube to be detected is qualified, and the infusion tube to be detected is in a first-grade product.

Background

The production process of the disposable infusion tube comprises the steps of feeding materials, placing the materials into an air leakage testing device, manually winding the infusion tube into a specified form after testing, placing the infusion tube into a prepared packaging bag, uniformly sealing the bag by a specially-assigned person, and boxing the bag.

The tightness of the infusion tube is one of the main parameters for evaluating the infusion tube, and when nutrient solution is delivered, the insufficient tightness can cause the oxidation of the nutrient solution, so that the effect of the nutrient solution is reduced slightly, and the nutrient components in the nutrient solution are changed seriously, therefore, the airtightness detection is required before the infusion tube is packaged.

The current infusion tube air leakage detection is carried out manually. And detecting the air leakage of the infusion tube, manually placing the infusion tube into a testing device, manually blocking one end of the test, ventilating the other end of the test tube, maintaining the pressure for 4-5 seconds, manually judging the tightness of the infusion tube through a barometer, and sorting the infusion tube. Because the whole process adopts manual operation, the production efficiency is very low, and the air leakage piece is detected manually, which is determined by the experience of an operator to a great extent and has high error judgment.

Disclosure of Invention

Therefore, the invention provides a transfusion tube quality detection system which is used for solving the problems of low detection efficiency and low accuracy rate caused by manual transfusion tube quality detection in the prior art.

In order to achieve the above object, the present invention provides an infusion tube quality detection system, comprising:

the infusion tube detection device comprises a sliding table, a detection unit and a detection unit, wherein a puncture needle is arranged on the sliding table, one end of the puncture needle is connected with a tension sensor, and the sliding table is located at an initial position when the infusion tube to be detected is not connected;

the sliding rail is arranged below the sliding table, and the sliding table can slide along the sliding rail;

the motor is arranged on the sliding table and used for driving the sliding table to slide along the sliding rail, and a displacement sensor is arranged on the motor;

the fixing table is provided with an inflation needle, the inflation needle is connected with an inflation pump through an inflation pipeline, and the inflation pipeline is provided with an air pressure sensor;

the image acquisition device is arranged on one side of the sliding rail, and an infrared imaging probe is arranged on the image acquisition device;

the locking ring is used for locking the infusion tube to be detected;

the central control module is respectively connected with the tension sensor, the motor, the air pressure sensor, the displacement sensor, the inflator pump and the image acquisition device;

when the infusion tube quality detection system is adopted to detect the infusion tube, one end of the infusion tube to be detected is connected with the puncture needle, and the other end of the infusion tube to be detected is connected with the inflation needle; after the infusion tube to be detected is connected with the puncture needle and the inflation needle respectively, locking rings are additionally arranged on the peripheries of the connection parts respectively;

after the infusion tube to be detected is connected with the puncture needle and the inflation needle respectively, the motor drives the sliding table to move on the sliding rail in the direction away from the fixed table, the infusion tube to be detected is straightened, the tension sensor detects the tension applied to the puncture needle in real time in the straightening process, a tension evaluation parameter is arranged in the central control module, when the tension value detected by the tension sensor reaches the tension evaluation parameter, the central control module controls the motor to stop rotating, and the tension evaluation parameter is determined by the moving distance of the sliding block;

when the infusion tube to be detected is straightened, the central control module controls the inflator pump to inflate the infusion tube to be detected through the inflation needle, when the inflation pressure reaches the standard, the image acquisition device performs image detection on the infusion tube to be detected, and the central control module analyzes the detected image to determine the jumping tolerance of the infusion tube in the infusion tube to be detected and the minimum difference value between the inner diameter of the infusion tube and the outer diameter of the infusion tube; the central control module analyzes the jump tolerance and the minimum difference between the inner diameter of the infusion tube and the outer diameter of the infusion tube respectively, and judges whether the jump tolerance and the minimum difference between the inner diameter of the infusion tube and the outer diameter of the infusion tube are qualified or not;

when the jump tolerance and the minimum difference between the inner diameter of the infusion tube and the outer diameter of the infusion tube are qualified, the central control module controls the inflator pump to inflate the infusion tube to be detected again through inflation, and when the inflation pressure reaches the standard again, the infusion tube to be detected is placed still;

when the infusion tube to be detected is kept still for a long time, the pressure sensor detects the pressure value in the inflation pipeline at the moment, and the sealing performance of the infusion tube to be detected is judged according to the variation of the pressure value in the inflation pipeline of the central control module;

when the infusion tube to be detected is good in sealing performance, the central control module calculates the score of the infusion tube to be detected according to the jumping tolerance, the minimum difference value between the inner diameter of the infusion tube and the outer diameter of the infusion tube and the pressure value variable quantity so as to determine whether the infusion tube to be detected is qualified or not and grade the qualified product.

Further, when the motor drives the sliding table to move on the sliding rail in the direction away from the fixed table, the displacement sensor records the moving distance L in real time and transmits the recorded data to the central control module; the tension sensor detects tension F borne by the puncture needle in a displacement process in real time and transmits detected tension data to the central control module in real time;

a tension evaluation parameter Fz is arranged in the central control module, the central control module compares the detected tension value F with the tension evaluation parameter Fz,

when F is less than Fz, the central control module judges that the infusion tube to be detected is not straightened, and the motor continues to drive the sliding table to move;

and when F is larger than or equal to Fz, the central control module judges that the infusion tube to be detected is straightened, and the central control module controls the motor to stop rotating.

Further, when the sliding table is at the initial position, the distance between the sliding table and the fixed table is Lc, the numerical value of the tension evaluation parameter Fz is determined by the moving distance L, Fz = (L + Lc) × f, wherein f is a calculation parameter of the moving distance to the tension evaluation parameter.

Further, when the central control module determines that the infusion tube to be detected is straightened, the central control module controls the inflator pump to inflate the infusion tube to be detected through inflation, the air pressure sensor detects a pressure value P1 in the inflation pipeline and transmits a detection result to the central control module, a first standard pressure value Pb is preset in the central control module, the central control module compares the pressure value P with the first standard pressure value Pb,

when P1 is not more than Pb, the central control module controls the inflator pump to continue to inflate the infusion tube to be detected;

when P1 is greater than Pb, the central control module controls the inflator pump to stop inflating the infusion tube to be detected.

Furthermore, a temperature difference exists between the gas in the inflator and the external detection environment where the infusion tube to be detected is located, when the temperature of the external detection environment where the infusion tube to be detected is located is W, the temperature of the gas in the inflator is Wz, and Wz is not less than W + Wx, wherein Wx is the minimum temperature difference between the gas in the inflator and the external environment.

Further, when the P1 is larger than Pb, the central control module controls the inflator pump to stop inflating the infusion tube to be detected, the central control module controls the infrared imaging probe to perform image detection on the infusion tube to be detected, an image A of the infusion tube to be detected is obtained, and the infrared imaging probe transmits the obtained image A to the central control module;

the central control module analyzes the obtained data to obtain a jump tolerance B of the infusion tube in the infusion tube to be detected and a minimum difference C between the inner diameter of the infusion tube and the outer diameter of the infusion tube;

the central control module is internally provided with a run-out tolerance standard value Bz, the central control module compares the run-out tolerance B with the run-out tolerance standard value Bz,

when B is less than or equal to Bz, the central control module judges that the jumping tolerance of the infusion tube to be detected is qualified, and continues to perform next detection on the infusion tube to be detected;

and when B is larger than Bz, the central control module judges that the jumping tolerance of the infusion tube to be detected is unqualified, and the infusion tube to be detected is unqualified.

Furthermore, a minimum difference standard value Cz between the inner diameter and the outer diameter of the infusion tube is also arranged in the central control module, when the central control module judges that the jumping tolerance of the infusion tube to be detected is qualified, the central control module compares C with the minimum difference standard value Cz,

when C is less than or equal to Cz, the central control module judges that the minimum difference between the inner diameter of the infusion tube to be detected and the outer diameter of the infusion tube is qualified, and continues to perform next detection on the infusion tube to be detected;

and when C is larger than Cz, the central control module judges that the minimum difference between the inner diameter of the infusion tube to be detected and the outer diameter of the infusion tube is unqualified, and the infusion tube to be detected is unqualified.

Further, when the central control module judges that the minimum difference between the inner diameter of the infusion tube to be detected and the outer diameter of the infusion tube is qualified, the central control module controls the inflator pump to continue to inflate the infusion tube to be detected,

the air pressure sensor detects a pressure value P2 in the inflation pipeline and transmits the detection result to the central control module, a second standard pressure value Pc is preset in the central control module, the central control module compares the pressure value P with the second standard pressure value Pc,

when the P2 is not more than Pc, the central control module controls the inflator pump to continue to inflate the infusion tube to be detected;

when P2 is more than Pc, the central control module controls the inflator pump to stop inflating the infusion tube to be detected;

when the pressure value P2 is greater than Pc, the central control module controls the inflator pump to stop inflating the infusion tube to be detected and the detection time T is passed, the air pressure sensor detects a pressure value P2 'in the inflation pipeline and transmits the detection result to the central control module, and the central control module calculates a pressure value variation Px, wherein Px = P2-P2';

the central control module is internally provided with a pressure value variation standard value Pxz and compares the pressure value variation Px with the pressure value variation Pxz,

when the Px is less than or equal to the Pxz, the central control module judges that the infusion tube to be detected is good in sealing property;

and when Px is larger than Pxz, the central control module judges that the infusion tube to be detected has poor sealing performance and detects the infusion tube to be detected as an unqualified product.

Further, the pressure value variation criterion value Pxz is determined by the moving distance L, and Pxz = (L + Lc) × p, where p is a calculation parameter of the moving distance to the pressure value variation criterion value.

Further, when the central control module judges that the liquid conveying pipe to be detected is good in sealing performance, the central control module calculates the grade G of the liquid conveying pipe to be detected, G = e ÷ B + h ÷ C + k ÷ [ Px ÷ (L + Lc) ], wherein e is the grade evaluation parameter of a jumping tolerance to the liquid conveying pipe, h is the grade evaluation parameter of the liquid conveying pipe to the minimum difference value between the inner diameter of the liquid conveying pipe and the outer diameter of the liquid conveying pipe, and k is the grade evaluation parameter of a pressure value variation to the liquid conveying pipe;

the central control module is internally provided with a first scoring parameter G1 of the infusion tube and a second scoring parameter G2 of the infusion tube, wherein G1 is less than G2, the central control module compares the score G with a first scoring parameter G1 of the infusion tube and a second scoring parameter G2 of the infusion tube,

when G is less than or equal to G1, the central control module judges that the infusion tube to be detected is unqualified;

when G is more than G1 and less than or equal to G2, the central control module judges that the infusion tube to be detected is qualified, and the infusion tube to be detected is in a secondary grade product;

and when G is larger than G2, the central control module judges that the infusion tube to be detected is qualified, and the infusion tube to be detected is in a first-grade product.

The detection system detects that the qualified infusion tube is used for nutrient solution infusion, when nutrient solution is input, an infusion supervision system for the nutrient solution is arranged, a preset infusion speed M1 and a preset completion time T1 of a bag of nutrient solution are arranged in the infusion supervision system, when infusion is carried out at the speed M1 and the infusion tube passes through 0.2T1, the infusion supervision system detects the residual quantity V of the nutrient solution and calculates the absolute value delta V of the difference value between the residual quantity V of the nutrient solution and the theoretical residual quantity Vb, the delta V = | _ V-Vb |, a standard absolute value delta Vz is arranged in the infusion supervision system, the infusion supervision system compares the delta V with the delta Vz,

when the delta V is less than the delta Vz, the infusion monitoring system does not adjust the infusion speed;

when the delta V is less than the delta Vz, the infusion monitoring system adjusts the infusion speed to ensure that the infusion is finished within a preset time range, wherein,

when V is larger than Vb, the infusion monitoring system increases the infusion speed; when V is less than Vb, the infusion monitoring system reduces the infusion speed; the adjusted speed was M2.

When an infusion is performed at M2 speed and 0.2T1 is passed, the infusion supervision system detects the pressure R in the bag and secondarily adjusts the infusion speed according to the internal pressure R.

By passing

Compared with the prior art, the intelligent detection device has the advantages that the central control module and the air pressure sensor are arranged, the inflation process is intelligently controlled, all parameters of the infusion tube are detected after the inflation is qualified, when the infusion tube is kept still and is detected for a long time, the air pressure sensor detects the pressure value in the inflation tube at the moment, and the variation of the pressure value in the inflation tube of the central control module is used for judging the tightness of the infusion tube to be detected, so that the possibility of manual misjudgment is reduced, the detection precision is improved, meanwhile, the whole intelligent detection process is realized, and the detection efficiency is improved.

Particularly, when the infusion tube to be detected is good in sealing performance, the central control module calculates the grade of the infusion tube to be detected according to the jumping tolerance, the minimum difference value between the inner diameter of the infusion tube and the outer diameter of the infusion tube and the pressure value variation to determine whether the infusion tube to be detected is qualified or not and grade the qualified products, and comprehensively evaluates the infusion tube to be detected according to the jumping tolerance, the minimum difference value between the inner diameter of the infusion tube and the outer diameter of the infusion tube and the pressure value variation, so that the accuracy of a measuring result is guaranteed, the detection precision of the infusion tube is improved, meanwhile, the qualified infusion tube is graded, the infusion tube detection quality system is perfected, and the enterprise risk is reduced.

Further, after the infusion tube to be detected is connected with the puncture needle and the inflation needle respectively, the motor drives the sliding table to move on the sliding rail along the direction away from the fixed table, and the displacement sensor records the moving distance L in real time and transmits recorded data to the central control module; the tension sensor detects tension F borne by the puncture needle in a displacement process in real time and transmits detected tension data to the central control module in real time; the infusion tube straightening device is characterized in that a tension evaluation parameter Fz is arranged in the central control module, the central control module compares a detected tension value F with the tension evaluation parameter Fz, the infusion tube can detect the characteristic of the infusion tube in a straightening state more easily, whether the infusion tube to be detected is straightened is judged by detecting the tension of the inserted needle in the moving process, when the straightening is judged, the movement of the motor is stopped, the detection result is prevented from being influenced by the overlarge stretching of the infusion tube, meanwhile, when the straightening is not judged, the motor is continuously controlled to rotate until the tension reaches the straightening standard, the detection result is prevented from being influenced by the un-straightening of the infusion tube, and the stability of the detection result is ensured by detecting the tension of the inserted needle in the moving process.

Particularly, when the sliding table is at an initial position, the distance between the sliding table and the fixed table is Lc, the numerical value of the tension evaluation parameter Fz is determined by the moving distance L, the longer the displacement distance of the sliding table is, the longer the distance of the infusion tube to be detected is, the larger the gravity of the infusion tube is, and meanwhile, the larger the tension required for straightening the infusion tube is, the specific numerical value of the tension evaluation parameter Fz is determined by the displacement value, so that the tension evaluation parameter can be changed along with the change of the length of the infusion tube, the accuracy of the measurement result is ensured, the detection precision of the infusion tube is improved, meanwhile, the universality of the detection system is also improved, and further, when the infusion tubes with different lengths are detected, the detection parameter does not need to be manually adjusted, and the detection efficiency is improved.

Further, when the central control module determines that the infusion tube to be detected is straightened, the central control module controls the inflator pump to inflate the infusion tube to be detected through inflation, the air pressure sensor detects a pressure value P1 in the inflation pipeline and transmits a detection result to the central control module, a first standard pressure value Pb is preset in the central control module, the central control module compares the pressure value P with the first standard pressure value Pb, the first standard pressure value is set to be slightly larger than the standard air pressure, so that the interior of the infusion tube to be detected is filled with gas, the image acquisition device can acquire clear images when acquiring the images, and accuracy of the detection result is guaranteed.

Furthermore, there is a temperature difference between the gas in the inflator pump and the external detection environment where the infusion tube to be detected is located, so that the image acquisition device can acquire clear images during image acquisition, and the accuracy of the detection result is further ensured.

Furthermore, a jumping tolerance standard value Bz is arranged in the central control module, the central control module compares the jumping tolerance B with the jumping tolerance standard value Bz, the smoothness of the inner diameter of the infusion tube is ensured by detecting the jumping tolerance of the infusion tube to be detected, and the quality of the infusion tube is ensured.

Further, a minimum difference standard value Cz between the inner diameter and the outer diameter of the infusion tube is also arranged in the central control module, when the central control module judges that the jumping tolerance of the infusion tube to be detected is qualified, the central control module compares C with the minimum difference standard value Cz, the thickness of the infusion tube is ensured to reach the standard by detecting the minimum difference between the jumping inner diameter of the infusion tube to be detected and the outer diameter of the infusion tube, and the quality of the infusion tube is ensured.

Further, when the P2 is more than Pc, the central control module controls the inflator pump to stop inflating the infusion tube to be detected for a detection time period T, the air pressure sensor detects a pressure value P2' in the inflation pipeline and transmits the detection result to the central control module, the central control module calculates the pressure value variation Px, the central control module is internally provided with a pressure value variation standard value Pxz and compares the pressure value variation Px with the pressure value variation Pxz, during inflation, because the gas is in a flowing state, a certain deviation exists between the detected pressure value and the pressure value actually born in the infusion tube, through setting up pressure value transform standard value, compare with the pressure value variation that detects, prevent to aerify dynamic pressure and actual pressure nonconformity, lead to the inaccurate phenomenon of transfer line quality detection, ensured the quality of transfer line when guaranteeing the accuracy of testing result.

Especially, pressure value variation standard value Pxz is confirmed by moving distance L, the longer the transfer line, the bigger the pressure value variation, and the pressure value variation is adjusted through the moving distance, so that the pressure value variation standard value can be changed along with the change of the length of the transfer line, the accuracy of the measurement result is ensured, the detection precision of the transfer line is improved, meanwhile, the universality of the detection system is also improved, and further, when the transfer lines with different lengths are detected, the detection parameters do not need to be manually adjusted, and the detection efficiency is improved.

Drawings

Fig. 1 is a schematic structural diagram of an infusion tube quality detection system according to the present invention.

Detailed Description

In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, which is a schematic structural diagram of an infusion tube quality detection system according to the present invention, the present invention discloses an infusion tube quality detection system, including:

the infusion tube detection device comprises a sliding table 1, wherein a puncture needle 101 is arranged on the sliding table 1, one end of the puncture needle 101 is connected with a tension sensor 102, and the sliding table 1 is located at an initial position when the infusion tube 11 to be detected is not connected;

the sliding rail 2 is arranged below the sliding table 1, and the sliding table 1 can slide along the sliding rail 2;

the motor 3 is arranged on the sliding table 1 and used for driving the sliding table 1 to slide along the sliding rail 2, and a displacement sensor 301 is arranged on the motor 3;

the fixing table 4 is provided with an inflation needle 401, the inflation needle 401 is connected with an inflation pump 8 through an inflation pipeline 9, and an air pressure sensor 10 is arranged on the inflation pipeline 9;

the image acquisition device 5 is arranged on one side of the sliding rail 2, and an infrared imaging probe 501 is arranged on the image acquisition device 5;

a locking ring 6 for locking the infusion tube to be detected;

the central control module 7 is connected with the tension sensor, the motor 3, the air pressure sensor 10, the displacement sensor 301, the inflator pump 8 and the image acquisition device 5 respectively;

when the infusion tube quality detection system is adopted to detect the infusion tube, one end of the infusion tube to be detected is connected with the puncture needle 101, and the other end of the infusion tube to be detected is connected with the inflation needle 401; after the infusion tube to be detected is connected with the puncture needle 101 and the inflation needle 401 respectively, locking rings 6 are additionally arranged on the periphery of the connection part respectively.

After the infusion tube 11 to be detected is connected with the puncture needle 101 and the inflation needle 401 respectively, the motor 3 drives the sliding table 1 to move on the sliding rail 2 in the direction away from the fixed table 4, and the displacement sensor 301 records the moving distance L in real time and transmits the recorded data to the central control module 7; the tension sensor 102 detects tension F borne by the puncture needle 101 in the displacement process in real time and transmits detected tension data to the central control module 7 in real time;

specifically, a tension evaluation parameter Fz is arranged in the central control module 7, the central control module 7 compares the detected tension value F with the tension evaluation parameter Fz,

when F is less than Fz, the central control module 7 judges that the infusion tube 11 to be detected is not straightened, and the motor 3 continues to drive the sliding table 1 to move;

when F is larger than or equal to Fz, the central control module 7 judges that the infusion tube 11 to be detected is straightened, and the central control module 7 controls the motor 3 to stop rotating.

The transfer line detects its characteristic more easily under the state of flare-outing, through the pulling force that the needle 101 received of pricking in the detection removal in-process, judge and treat whether the transfer line 11 of examining is flare-outing, when judging the flare-outing, stop the removal of motor 3, prevent that the transfer line from tensile too big influence testing result, and simultaneously, when judging not flare-outing, continue control motor 3 and rotate, reach the standard of flare-outing until the pulling force, prevent that the transfer line from not flare-outing influencing testing result, the pulling force that the needle 101 received of pricking in the detection removal in-process has guaranteed testing result's stability through the detection.

Specifically, when the sliding table 1 is in the initial position, the distance Lc between the sliding table 1 and the fixed table 4 is set, the value of the tension evaluation parameter Fz is determined by the moving distance L, Fz = (L + Lc) × f, where f is a calculation parameter of the moving distance to the tension evaluation parameter.

Lc =1m, f =0.1N/m in the present embodiment;

the longer the displacement distance of the sliding table 1, the longer the distance of the infusion tube to be detected, the larger the gravity of the infusion tube, the larger the pulling force required for straightening the infusion tube, the specific numerical value of the pulling force evaluation parameter Fz is determined by the displacement value, the change of the pulling force evaluation parameter along with the change of the length of the infusion tube is ensured, the accuracy of the measurement result is ensured, the detection precision of the infusion tube is improved, meanwhile, the universality of a detection system is also improved, furthermore, when the infusion tube with different lengths is detected, the detection parameter does not need to be manually adjusted, and the detection efficiency is improved.

Specifically, when the central control module 7 determines that the infusion tube 11 to be detected is straightened, the central control module 7 controls the inflator 8 to inflate the infusion tube 11 to be detected through the inflation needle 401, the air pressure sensor 10 detects a pressure value P1 in the inflation pipeline 9 and transmits a detection result to the central control module 7, a first standard pressure value Pb is preset in the central control module 7, the central control module 7 compares the pressure value P with the first standard pressure value Pb,

when P1 is not more than Pb, the central control module 7 controls the inflator pump 8 to continue to inflate the infusion tube 11 to be detected;

when P1 is greater than Pb, the central control module 7 controls the inflator pump 8 to stop inflating the infusion tube 11 to be detected.

In the present embodiment, Pb =120 kPa.

The first standard pressure value is set to be slightly larger than the standard air pressure, so that the infusion tube 11 to be detected is filled with air, the image acquisition device 5 is convenient to acquire clear images during image acquisition, and the accuracy of a detection result is ensured.

Specifically, there is a temperature difference between the gas in the inflator 8 and the external detection environment of the infusion tube 11 to be detected, and when the external detection environment of the infusion tube 11 to be detected is W, the temperature of the gas in the inflator 8 is Wz, and Wz is not less than W + Wx, where Wx is the minimum temperature difference between the gas in the inflator 8 and the external environment.

In this embodiment, Wx =5 ℃.

There is a temperature difference between the gas in the inflator pump 8 and the external detection environment where the infusion tube 11 to be detected is located, so that the image acquisition device 5 can acquire clear images during image acquisition, and the accuracy of detection results is further ensured.

Specifically, when P1 is greater than Pb, the central control module 7 controls the inflator pump 8 to stop inflating the infusion tube 11 to be detected, the central control module 7 controls the infrared imaging probe to perform image detection on the infusion tube 11 to be detected, so as to obtain an image a of the infusion tube 11 to be detected, and the infrared imaging probe transmits the obtained image a to the central control module 7;

the central control module 7 analyzes the obtained data to obtain a jumping tolerance B of a transfusion pipeline in the transfusion pipe 11 to be detected and a minimum difference C between the inner diameter of the transfusion pipe and the outer diameter of the transfusion pipe;

a run-out tolerance standard value Bz is arranged in the central control module 7, the run-out tolerance B is compared with the run-out tolerance standard value Bz by the central control module 7,

when B is less than or equal to Bz, the central control module 7 judges that the jumping tolerance of the infusion tube 11 to be detected is qualified, and continues to perform next detection on the infusion tube 11 to be detected;

when B is larger than Bz, the central control module 7 judges that the jumping tolerance of the infusion tube 11 to be detected is unqualified, and the infusion tube 11 to be detected is unqualified.

In the present embodiment, Bz =0.1 mm.

By detecting the jumping tolerance of the infusion tube 11 to be detected, the smoothness of the inner diameter of the infusion tube is ensured, and the quality of the infusion tube is ensured.

Specifically, a minimum difference standard value Cz between the inner diameter and the outer diameter of the infusion tube is also arranged in the central control module 7, when the central control module 7 judges that the pulsation tolerance of the infusion tube 11 to be detected is qualified, the central control module 7 compares C with the minimum difference standard value Cz,

when C is less than or equal to Cz, the central control module 7 judges that the minimum difference between the inner diameter of the infusion tube 11 to be detected and the outer diameter of the infusion tube is qualified, and continues to perform next detection on the infusion tube 11 to be detected;

when C is larger than Cz, the central control module 7 judges that the minimum difference between the inner diameter of the infusion tube 11 to be detected and the outer diameter of the infusion tube is unqualified, and the infusion tube 11 to be detected is unqualified.

In the present embodiment, Cz =0.2 mm.

By detecting the minimum difference between the jumping inner diameter of the infusion tube 11 to be detected and the outer diameter of the infusion tube, the thickness of the infusion tube is ensured to reach the standard, and the quality of the infusion tube is ensured.

Specifically, when the central control module 7 determines that the minimum difference between the inner diameter of the infusion tube 11 to be detected and the outer diameter of the infusion tube is qualified, the central control module 7 controls the inflator pump 8 to continue to inflate the infusion tube 11 to be detected.

Specifically, the air pressure sensor 10 detects a pressure value P2 in the inflation pipeline 9 and transmits the detection result to the central control module 7, a second standard pressure value Pc is preset in the central control module 7, the central control module 7 compares the pressure value P with the second standard pressure value Pc,

when the P2 is not more than Pc, the central control module 7 controls the inflator pump 8 to continue to inflate the infusion tube 11 to be detected;

when P2 is greater than Pc, the central control module 7 controls the inflator pump 8 to stop inflating the infusion tube 11 to be detected.

In the present embodiment, Pc =400 kPa.

Specifically, when P2 > Pc causes the central control module 7 to control the inflator pump 8 to stop inflating the infusion tube 11 to be tested and a detection time period T elapses, the air pressure sensor 10 detects a pressure value P2 'in the inflation tube 9 and transmits a detection result to the central control module 7, and the central control module 7 calculates a pressure value variation Px, Px = P2-P2'.

Specifically, the pressure value variation standard value Pxz is set in the central control module 7, the central control module 7 compares the pressure value variation Px with the pressure value variation Pxz,

when the Px is less than or equal to the Pxz, the central control module 7 judges that the infusion tube 11 to be detected has good sealing performance;

when Px is larger than Pxz, the central control module 7 judges that the transfusion tube 11 to be detected has poor sealing performance and detects the transfusion tube to be detected as an unqualified product.

In this example, T =5 s.

When aerifing, because gas is in the mobile state, the pressure value that detects and the interior actual pressure value that bears of transfer line can have certain deviation, through setting up pressure value transform standard value, contrasts with the pressure value variation that detects, prevents to aerify dynamic pressure and actual pressure nonconformity, leads to the inaccurate phenomenon of transfer line quality detection, has ensured the quality of transfer line when guaranteeing the accuracy of testing result.

Specifically, the pressure value variation criterion value Pxz is determined by the movement distance L, and Pxz = (L + Lc) × p, where p is a calculation parameter of the movement distance to the pressure value variation criterion value.

In this example p =1.2 kPa/m.

The transfer line is longer, and the pressure value variation is big more, adjusts the pressure value variation through the migration distance, ensures that pressure value variation standard value can change along with the change of transfer line length, has guaranteed measuring result's accuracy, has improved the detection precision of transfer line, simultaneously, has also improved detecting system's universality, and then, detects time measuring to the transfer line of different length, needn't manual regulation detection parameter, has promoted the efficiency that detects.

Specifically, when the central control module 7 judges that the infusion tube 11 to be detected is good in sealing performance, the central control module 7 calculates the score G of the infusion tube 11 to be detected, G = e ÷ B + h ÷ C + k ÷ [ Px ÷ (L + Lc) ], wherein e is the score evaluation parameter of the jitter tolerance to the infusion tube, h is the score evaluation parameter of the infusion tube by the minimum difference value between the inner diameter of the infusion tube and the outer diameter of the infusion tube, and k is the score evaluation parameter of the pressure value variation to the infusion tube.

In the present embodiment, e =2mm, h =3mm, and k =30 kPa/m.

Specifically, a first scoring parameter G1 of the infusion tube and a second scoring parameter G2 of the infusion tube are arranged in the central control module 7, wherein G1 is less than G2, the central control module 7 compares the score G with a first scoring parameter G1 of the infusion tube and a second scoring parameter G2 of the infusion tube,

when G is less than or equal to G1, the central control module 7 judges that the infusion tube 11 to be detected is unqualified;

when G is more than G1 and less than or equal to G2, the central control module 7 judges that the infusion tube 11 to be detected is qualified, and the infusion tube 11 to be detected is in a secondary grade product;

when G is larger than G2, the central control module 7 judges that the infusion tube 11 to be detected is qualified, and the infusion tube 11 to be detected is in a first-grade product.

In the present embodiment, G1=60, and G2= 90.

The infusion tube 11 to be detected is comprehensively evaluated according to the jumping tolerance, the minimum difference between the inner diameter of the infusion tube and the outer diameter of the infusion tube and the variable quantity of the pressure value, the accuracy of the measuring result is guaranteed, the detection precision of the infusion tube is improved, meanwhile, the qualified infusion tube is graded, the infusion tube detection quality system is perfected, and the enterprise risk is reduced.

The invention can simultaneously set a plurality of sliding tables and detect a plurality of infusion tubes, thereby accelerating the detection efficiency.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.