1. A pipeline damage detection device, comprising:

installing a pipe;

the air bag extends along the length direction of the installation pipe, is provided with a connecting end arranged in the installation pipe and a measuring end protruding out of the installation pipe, and is provided with an inflation inlet, and the measuring end is used for extending into a pipeline to be measured;

the hydraulic injection structure is arranged at two opposite ends of the air bag in the length direction and is in sealed connection with the air bag, the hydraulic injection structure is provided with an input end and an output end, and the output end is arranged close to the measuring end and is used for filling fluid into a pipeline to be measured; and the number of the first and second groups,

and the guided wave sensing device is arranged at the measuring end and used for transmitting and receiving guided waves so as to detect the pipeline damage condition of the pipeline to be detected.

2. The pipe damage detection device of claim 1, wherein the hydraulic injection structure comprises a hydraulic injection tube extending along a length of the balloon, one opening of the hydraulic injection tube near the measurement end forming the output end, the other opening of the hydraulic injection tube near the mounting end forming the input end.

3. The pipeline damage detection device according to claim 2, wherein mounting holes are respectively formed in two opposite ends of the air bag in the length direction, a sealing ring is arranged at each mounting hole, two ends of the hydraulic injection pipe are respectively arranged in the corresponding sealing rings in a penetrating manner, and each sealing ring is used for sealing and connecting the hydraulic injection pipe and the air bag.

4. The pipeline damage detection device according to claim 3, wherein the hydraulic pressure injection pipe is a rigid hydraulic pressure injection straight pipe, and an extending direction of the rigid hydraulic pressure injection straight pipe is parallel to an extending direction of the air bag.

5. The pipeline damage detection device of claim 1, wherein the guided wave sensing device comprises an ultrasonic guided wave sensor and a controller, the ultrasonic guided wave sensor is electrically connected to the measurement end, the controller is arranged close to the installation end, and the ultrasonic guided wave sensor is connected to the controller through a cable.

6. The pipeline damage detection device of claim 5, wherein the ultrasonic guided wave sensor is provided in a plurality, the plurality of ultrasonic guided wave sensors are annularly distributed on the periphery of the measuring end, and each ultrasonic guided wave sensor is electrically connected with the controller.

7. The apparatus according to claim 6, wherein the ultrasonic guided wave sensor device further comprises a mounting ring, the mounting ring is sleeved on the measuring end, and each ultrasonic guided wave sensor is arranged on the mounting ring.

8. The pipe damage detection device of claim 7, wherein an annular mounting groove is formed on a peripheral side of the measuring end, and the mounting ring is disposed in the annular mounting groove and partially protrudes from the annular mounting groove.

9. A pipe damage detection method based on the pipe damage detection device according to any one of claims 1 to 8, comprising:

extending the measuring end of the pipeline damage detection device into the cavity of the pipeline to be detected, and enabling the installation pipe to be flush with the pipeline to be detected;

injecting gas into the air bag to enable the air bag to be attached to the installation pipe and the inner pipe wall of the pipeline to be tested;

filling fluid into a pipe cavity of the pipeline to be tested by using a hydraulic injection structure, and acquiring first fluid pressure of the hydraulic injection structure;

using a guided wave sensing device to emit guided wave signals into the pipeline to be tested and receive first reflection signals of the pipeline to be tested;

continuously filling fluid into the pipe cavity of the pipeline to be tested by using a hydraulic injection structure, and acquiring second fluid pressure of the hydraulic injection structure;

transmitting a guided wave signal into the pipeline to be detected by using a guided wave sensing device, and receiving a second reflected signal of the pipeline to be detected;

outputting the damage condition of the pipeline to be detected according to the first reflection signal and the second reflection signal; wherein the second fluid pressure is greater than the first fluid pressure.

10. The pipeline damage detection method according to claim 9, wherein the first fluid pressure is P1, the pressure in the bladder is P2, the end area of the bladder is a1, the contact area of the measurement end and the pipeline to be measured is a2, the contact area of the connection end and the installation pipe is A3, the friction coefficient of the outer surface of the bladder is f, P1, P2, a1, a2, A3 and f, and the following relationships are satisfied: p2 (a2+ A3) f > P1 a 1.

Background

Currently, in pipeline damage detection construction, a radiation inspection method and an ultrasonic inspection method are generally adopted. For the pipeline penetrating through the partition plate structure, when the construction space on one side of the partition plate is insufficient, damage detection construction can be carried out only on the other side of the partition plate wall, and an ultrasonic flaw detection method cannot be applied because the damage part cannot be approached; when other metal parts are directly attached to the pipeline on one side of the partition wall with insufficient construction space, the detection result of the radiographic inspection method is inaccurate due to the interference of the metal parts.

Disclosure of Invention

The invention provides a pipeline damage detection device and a pipeline damage detection method, which are used for solving the problems of complex pipeline damage testing steps and low testing efficiency in the prior art, improving the working efficiency of a damage detection test and reducing the workload of the damage test.

To solve the problems in the prior art, an embodiment of the present invention provides a pipeline damage detection apparatus, including:

installing a pipe;

the air bag extends along the length direction of the installation pipe, is provided with a connecting end arranged in the installation pipe and a measuring end protruding out of the installation pipe, and is provided with an inflation inlet, and the measuring end is used for extending into a pipeline to be measured;

the hydraulic injection structure is arranged at two opposite ends of the air bag in the length direction and is in sealed connection with the air bag, the hydraulic injection structure is provided with an input end and an output end, and the output end is arranged close to the measuring end and is used for filling fluid into a pipeline to be measured; and the number of the first and second groups,

and the guided wave sensing device is arranged at the measuring end and used for transmitting and receiving guided waves so as to detect the pipeline damage condition of the pipeline to be detected.

According to the pipeline damage detection device provided by the invention, the hydraulic injection structure comprises a hydraulic injection pipe, the hydraulic injection pipe extends along the length direction of the air bag, one opening of the hydraulic injection pipe close to the measuring end forms the output end, and the other opening of the hydraulic injection pipe close to the mounting end forms the input end.

According to the pipeline damage detection device provided by the invention, two ends of the air bag, which are oppositely arranged in the length direction, are respectively provided with the mounting holes, the mounting holes are respectively provided with the sealing rings, two ends of the hydraulic injection pipe are respectively penetrated through the corresponding sealing rings, and the sealing rings are respectively used for hermetically connecting the hydraulic injection pipe and the air bag.

According to the pipeline damage detection device provided by the invention, the hydraulic injection pipe is a rigid hydraulic injection straight pipe, and the extension direction of the rigid hydraulic injection straight pipe is parallel to the extension direction of the air bag.

According to the pipeline damage detection device provided by the invention, the guided wave sensing device comprises an ultrasonic guided wave sensor and a controller which are electrically connected, the ultrasonic guided wave sensor is arranged at the measuring end, the controller is arranged close to the mounting end, and the ultrasonic guided wave sensor is connected with the controller through a cable.

According to the pipeline damage detection device provided by the invention, the number of the ultrasonic guided wave sensors is multiple, the plurality of the ultrasonic guided wave sensors are annularly distributed on the peripheral side of the measuring end, and each ultrasonic guided wave sensor is electrically connected with the controller.

According to the pipeline damage detection device provided by the invention, the ultrasonic guided wave sensing device further comprises a mounting ring, the mounting ring is sleeved on the measuring end, and each ultrasonic guided wave sensor is arranged on the mounting ring.

According to the pipeline damage detection device provided by the invention, the peripheral side of the measuring end is provided with an annular mounting groove, and the mounting ring is arranged in the annular mounting groove and partially protrudes out of the annular mounting groove.

Based on the pipeline damage detection device, the invention also provides a pipeline damage detection method, which comprises the following steps:

extending the measuring end of the pipeline damage detection device into the cavity of the pipeline to be detected, and enabling the installation pipe to be flush with the pipeline to be detected;

injecting gas into the air bag to enable the air bag to be attached to the installation pipe and the inner pipe wall of the pipeline to be tested;

filling fluid into a pipe cavity of the pipeline to be tested by using a hydraulic injection structure, and acquiring first fluid pressure of the hydraulic injection structure;

using a guided wave sensing device to emit guided wave signals into the pipeline to be tested and receive first reflection signals of the pipeline to be tested;

continuously filling fluid into the pipe cavity of the pipeline to be tested by using a hydraulic injection structure, and acquiring second fluid pressure of the hydraulic injection structure;

transmitting a guided wave signal into the pipeline to be detected by using a guided wave sensing device, and receiving a second reflected signal of the pipeline to be detected;

outputting the damage condition of the pipeline to be detected according to the first reflection signal and the second reflection signal; wherein the second fluid pressure is greater than the first fluid pressure.

According to the pipeline damage detection method provided by the invention, the first fluid pressure is P1, the pressure in the air bag is P2, the end part area of the air bag is A1, the contact area of the measuring end and the pipeline to be detected is A2, the contact area of the connecting end and the mounting pipe is A3, the friction coefficient of the outer surface of the air bag is f, and the following relations are satisfied: p2 (a2+ A3) f > P1 a 1.

According to the pipeline damage detection device provided by the invention, the installation pipe is used as the extension of the pipeline to be detected, so that a sufficient friction area is provided for the air bag, and the damage detection requirement of the high-pressure pipeline can be met; the guided wave sensing device is arranged inside the pipeline to be detected, so that the problems that the pipeline with the damaged part difficult to attach is difficult to implement damage detection and the damage detection of the pipeline with the damaged part interfered by nearby structures is inaccurate can be solved; in addition, fluid is filled into the pipeline to be detected through the hydraulic injection pipe, and damage detection of the pipeline to be detected under different pressure conditions can be achieved. The pipeline damage detection device provided by the invention can greatly improve the working efficiency of the pipeline damage test and reduce the workload of the pipeline damage test.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of a pipeline damage detection device provided by the present invention;

FIG. 2 is a schematic structural diagram of the guided wave sensing device of FIG. 1;

FIG. 3 is a schematic view of the assembled structure of FIG. 1;

fig. 4 is a flow chart of the pipeline damage detection method provided by the invention.

Reference numerals:

1: a pipeline damage detection device; 2: installing a pipe; 3: an air bag;

4: a hydraulic injection structure; 5: a guided wave sensing device; 6: a pipeline to be tested;

7: a connecting end; 8: a measuring end; 9: an inflation inlet;

10: mounting holes; 11: an inflation tube; 12: an input end;

13: an output end; 14: a hydraulic injection pipe; 15: an ultrasonic guided wave sensor;

16: a controller; 17: and (7) installing a ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The pipe damage detection apparatus 1 and the pipe damage detection method of the present invention are described below with reference to fig. 1 to 4.

When carrying out damage measurement to the pipeline, pipeline 6 that awaits measuring generally has a sealed end, is provided with valve or shutoff mechanism at this end, and the other end is the open end for fill fluid conveniently carries out damage test to pipeline 6 that awaits measuring, and the fluid of filling under the general condition can set up the fluid that pipeline 6 that awaits measuring filled into under the normal behavior, is favorable to detecting the damage condition of pipeline 6 that awaits measuring under the normal behavior.

Referring to fig. 1 to 3, the pipeline damage detecting device 1 of the present invention includes: installing the pipe 2; gasbag 3, gasbag 3 extend along the length direction of installation pipe 2, have the link 7 of locating in installation pipe 2 to and the measurement end 8 of protrusion installation pipe 2, seted up inflation inlet 9 on the gasbag 3, measurement end 8 is used for stretching into in the pipeline 6 that awaits measuring. Installation pipe 2 has the installation cavity, and the both ends of installation pipe 2 on its length direction all set up with the opening of installation cavity intercommunication, installation cavity, and one of them opening setting of measuring end 8 salient of gasbag 3 are located to gasbag 3. The mounting tube 2 is an extension of the pipe 6 to be tested, and is more easily butted with the pipe 6 to be tested during testing, and provides a sufficient friction area for the air bag 3. In the actual test process, the installation pipe 2 can be replaced according to the actual condition of the pipeline 6 to be tested, preferably, the size and the shape of the installation pipe are the same as those of the pipeline 6 to be tested, and the test is convenient. It should be noted that in addition, gasbag 3 sets up as an organic whole, and connecting end 7 is used for being connected with installation pipe 2, and measuring end 8 is used for stretching into in 6 pipelines that await measuring (the open end) measuring the damage of pipeline, and inflation inlet 9 on the gasbag 3 can inflate gasbag 3, and the gasbag 3 of accomplishing of aerifing can play the shutoff effect to pipeline 6 that await measuring, conveniently tests.

The hydraulic injection structure 4 penetrates through two ends of the air bag 3, which are oppositely arranged in the length direction, and is connected with the air bag 3 in a sealing manner, the hydraulic injection structure 4 is provided with an input end 12 and an output end 13, and the output end 13 is arranged close to the measuring end 8 and is used for filling fluid into the pipeline 6 to be measured; and the guided wave sensing device 5 is arranged at the measuring end 8 and used for transmitting and receiving guided waves to detect the pipeline damage condition of the pipeline 6 to be detected. In this embodiment, a section of sealed space is formed between the pipeline 6 to be measured and the airbag 3 through plugging of the airbag 3, fluid is filled into the sealed space through the hydraulic injection structure 4, the guided wave sensing device 5 is used for sending a signal into the pipeline 6 to be measured and acquiring a reflection signal, then the sealed space is continuously filled with the fluid to change the pipeline pressure in the sealed space, and at this time, the signal is sent into the pipeline 6 to be measured and acquiring the reflection signal. If the pipe is damaged greatly, if the pressure in the pipe changes, the state of the damaged pipe also changes, which causes a change in the reflected signal. If the difference of the two reflected signals is large, the pipeline is damaged greatly, and if the difference of the two reflected signals is small, the pipeline is damaged slightly or has no damage.

In the current pipe damage detection construction, a radiation inspection method and an ultrasonic inspection method are generally used. For the pipeline penetrating the partition plate structure, when the construction space on one side of the partition plate is insufficient, the damage detection construction can be carried out only on the other side of the partition plate wall, and the ultrasonic flaw detection method cannot be applied because the damage part cannot be approached. The pipeline damage detection device 1 provided by the invention uses the installation pipe 2 as the extension of the pipeline 6 to be detected, on one hand, the friction area of the air bag 3 is increased, the pipeline sealing effect is improved, and the requirement of a high-pressure pipeline damage test is met; on the other hand connects pipeline 6 that awaits measuring through installation pipe 2 for gasbag 3 stretches into in the pipeline 6 that awaits measuring, and under the condition that the pipeline has the separation, also can measure the damage condition of the pipeline of separation other end. According to the invention, by arranging the hydraulic injection structure 4, different types of fluids can be filled in the pipeline 6 to be detected, and the damage condition of the pipeline 6 to be detected under different working conditions can be detected.

Specifically, the hydraulic pressure injection structure 4 includes a hydraulic pressure injection pipe 14, the hydraulic pressure injection pipe 14 extends along the length direction of the airbag 3, openings at both ends of the hydraulic pressure injection pipe 14 form an input end 12 and an output end 13, respectively, one opening of the hydraulic pressure injection pipe 14 near the measurement end 8 forms an output end 13, and the other opening of the hydraulic pressure injection pipe 14 near the connection end 7 forms an input end 12. In the technical scheme provided by the invention, two ends of the air bag 3 which are oppositely arranged in the length direction are respectively provided with a mounting hole 10, and two ends of a hydraulic injection pipe 14 are respectively penetrated through the corresponding mounting holes 10 and are in sealing connection with the air bag 3. Sealing rings are arranged at the mounting holes 10, two ends of the hydraulic injection pipe 14 penetrate through the corresponding sealing rings respectively, and the sealing rings can be used for connecting the hydraulic injection pipe 14 and the air bag 3 in a sealing manner, so that the hydraulic injection pipe 14 or the air bag 3 can be conveniently detached; the mounting hole 10 may be provided with a thermal melting material, and the hydraulic injection pipe 14 and the airbag 3 may be connected by thermal melting, which may be selected by a user according to actual working conditions, but the present invention is not limited thereto. In addition, in the present invention, the hydraulic pressure injection pipe 14 is a rigid hydraulic pressure injection straight pipe, and the extending direction of the rigid hydraulic pressure injection straight pipe is parallel to the extending direction of the airbag 3. By the arrangement, the situation that the hydraulic injection pipe 14 damages the air bag 3 and affects the test can be prevented.

Specifically, guided wave sensing device 5 includes supersound guided wave sensor 15 and the controller 16 of electricity connection, and measurement end 8 is located to supersound guided wave sensor 15, and controller 16 is close to the setting of link 7, and supersound guided wave sensor 15 passes through the cable with controller 16 and is connected, and the cable has provided installation distance, and the user can be controlled supersound guided wave sensor 15 through controller 16 at link 7. Because the pipeline is annular, in order to improve the test precision, in the technical scheme provided by the invention, the ultrasonic guided-wave sensors 15 are arranged in a plurality, the plurality of ultrasonic guided-wave sensors 15 are annularly distributed on the peripheral side of the measuring end 8, and each ultrasonic guided-wave sensor 15 is electrically connected with the controller 16. The plurality of ultrasonic guided wave sensors 15 can acquire guided wave signals reflected back from all directions of the pipeline 6 to be tested, and the damage condition of the pipeline 6 to be tested is comprehensively known.

Further, in order to improve the stability of installation and guarantee the structural integrity, the ultrasonic guided-wave sensing device 5 further comprises an installation ring 17, the measurement end 8 is sleeved with the installation ring 17, and each ultrasonic guided-wave sensor 15 is arranged on the installation ring 17. The setting of collar 17 is convenient on the one hand dismantled, and on the other hand also plays certain guard action to gasbag 3, is favorable to prolonging the life of gasbag 3. It should be noted that an annular mounting groove is formed on the peripheral side of the measuring end 8, and the mounting ring 17 is disposed in the annular mounting groove and partially protrudes out of the annular mounting groove. The annular mounting groove can fix the mounting ring 17, and the mounting ring 17 is prevented from sliding in a dislocation manner to influence the test effect. The outstanding collar 17 that sets up the annular mounting groove can guarantee to locate each supersound guided wave sensor 15 homoenergetic on collar 17 surface and wait to be in close contact with between the pipeline 6, convenient test.

Furthermore, as mentioned above, the air bag 3 is provided with the inflation ports 9 to facilitate inflation of the air bag 3, in the technical scheme provided by the invention, the inflation ports 9 are provided in plurality, the inflation ports 9 are uniformly distributed on one side of the connecting end 7 away from the measuring end 8, and the air bag 3 can be uniformly inflated by arranging the inflation ports 9, so that the air bag 3 is more tightly attached to the pipeline 6 to be tested or the mounting pipe 2, and the test efficiency is improved. In addition, the uniform and distributed inflation is helpful for prolonging the service life of the air bag 3 and preventing the air bag 3 from exploding due to sudden increase of air volume. Further, the airbag 3 further includes an inflation tube 11, the inflation tube 11 has a plurality of inflation branches and an inflation main path communicated with the plurality of inflation branches, each inflation branch is correspondingly communicated with each inflation port 9, and in the actual use process, an inflation device can be used to communicate the inflation main path so as to continuously input gas to each inflation port 9.

Referring to fig. 4, on the basis of the pipeline damage detection apparatus 1, the present invention further provides a pipeline damage detection method, including:

s10, extending the measuring end of the pipeline damage detection device into the cavity of the pipeline to be detected, and enabling the installation pipe to be flush with the pipeline to be detected;

s20, injecting gas into the air bag to enable the air bag to be attached to the installation pipe and the inner pipe wall of the pipeline to be tested;

s30, filling fluid into the cavity of the pipeline to be tested by using a hydraulic injection structure, and acquiring first fluid pressure of the hydraulic injection structure;

s40, transmitting a guided wave signal into the pipeline to be tested by using a guided wave sensing device, and receiving a first reflection signal of the pipeline to be tested;

s50, continuously filling fluid into the cavity of the pipeline to be tested by using a hydraulic injection structure, and acquiring a second fluid pressure of the hydraulic injection structure;

s60, transmitting a guided wave signal into the pipeline to be tested by using a guided wave sensing device, and receiving a second reflection signal of the pipeline to be tested;

s70, outputting the damage condition of the pipeline to be detected according to the first reflection signal and the second reflection signal; wherein the second fluid pressure is greater than the first fluid pressure.

It should be noted that a section of sealed space is formed between the air bag 3 and the pipeline 6 to be tested, and fluid is filled into the sealed space through the hydraulic injection structure 4, so that the pressure change of the pipeline in the space can be continuously caused. Setting the first fluid pressure as P1, and under P1, the guided wave sensing device 5 can receive a first reflection signal of the pipeline 6 to be measured; and setting the second fluid pressure as P2, under P2, the guided wave sensing device 5 can receive a second reflected signal of the pipeline 6 to be measured. Since P2 is greater than P1, if there is severe damage to the pipeline, the pipeline damage will change if the pressure in the pipeline rises, thus causing a change in the reflected signal. Therefore, if the second reflected signal is close to the first reflected signal, it is proved that the condition of the pipeline 6 to be measured is good, and if the difference between the second reflected signal and the first reflected signal is large, it is proved that the damage condition of the pipeline 6 to be measured is serious.

Further, during the measurement, the first fluid pressure is P1, the pressure inside the bladder 3 is P2, the end area of the bladder 3 is a1, the contact area of the measurement end 8 and the measured pipeline is a2, the contact area of the connection end 7 and the mounting pipe 2 is A3, the friction coefficient of the outer surface of the bladder 3 is f, and P1, P2, a1, a2, A3 and f satisfy the following relations: p2 (a2+ A3) f > P1 a 1. In the measurement process, the parameters need to be kept to satisfy the relationship, and in the relationship, the friction force of the air bag 3 is larger than the thrust force generated by the fluid, so that the air bag 3 can be kept static, and the test can be maintained.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.