1. The utility model provides a box gas tightness automatic check out system which characterized in that: the method comprises the following steps:

the first conveying line is used for conveying the box body to be detected;

the detection device is used for carrying out air tightness detection on the box body to be detected;

the second conveying line is used for conveying the box body with qualified air tightness;

the third conveying line is used for conveying the box body with unqualified air tightness; and

and the robot is used for transferring the box to be detected on the first conveying line to the detection device and/or transferring the box detected by the detection device to the second conveying line or the third conveying line.

2. The automatic detection system for the airtightness of the box body according to claim 1, wherein: the detection device includes:

the workbench is provided with a stepped hole, the stepped hole is annular, and the top of the stepped hole is a larger end;

the rotary table is coaxially arranged in the stepped hole and can rotate under the driving of the first driving device;

the detection box is provided with a first inner cavity, one side of the first inner cavity facing the rotary table is communicated with the outside, the detection box is arranged at the top of the rotary table and can perform reciprocating linear motion between a first working position and a second working position under the driving of a second driving device, and when the detection box is at the first working position, the detection box and the rotary table are kept sealed;

the air pump is used for conveying air to the first inner cavity or pumping out the air in the first inner cavity;

the first control valve is used for controlling the connection and disconnection of the air pump and the first inner cavity; and

a first pressure sensor for measuring a pressure of air within the first lumen;

the detection box is arranged at one of the stations.

3. The automatic detection system for the airtightness of the box body according to claim 2, wherein: the detection device further comprises:

the standard tank is arranged between the air pump and the first inner cavity and is communicated with the first inner cavity and the air pump;

a third control valve for controlling the connection and disconnection of the standard tank and the air pump; and

a third pressure sensor for detecting a pressure within the standard tank.

4. The automatic detection system for the airtightness of the box body according to claim 3, wherein: the number of the stations is four, and the four stations correspond to the first conveying line, the detection box, the second conveying line and the third conveying line respectively;

the detection device further comprises: the first pushing device is used for pushing the box body with qualified air tightness onto the second conveying line; and

and the second pushing device is used for pushing the box body with unqualified air tightness onto the third conveying line.

5. The automatic detection system for the airtightness of the box body according to claim 4, wherein: the detection box is provided with a second inner cavity, the second inner cavity is arranged around the periphery of the first inner cavity, one side of the second inner cavity facing the rotary table is communicated with the outside, and the second inner cavity is communicated with the standard tank;

the detection device further comprises:

the second control valve is used for controlling the communication and disconnection of the second inner cavity and the standard tank; and

a second pressure sensor for detecting air pressure within the second lumen.

6. The automatic detection system for the airtightness of the box body according to claim 5, wherein: further comprising:

the rotary table is provided with a plurality of mounting grooves which are in one-to-one correspondence with the stations, and the sealing cover plates are arranged in the mounting grooves in one-to-one correspondence and are in sliding connection with the rotary table; and

the bottom of any one of the sealing cover plates is provided with the elastic piece, and the natural state has a tendency of enabling the sealing cover plate to move upwards towards the elastic piece.

7. The automatic detection system for the airtightness of the box body according to claim 6, wherein: the air pump is a vacuum pump.

8. The automatic detection system for the airtightness of the box body according to claim 7, wherein: the detection device further comprises a fourth control valve, and the fourth control valve is used for controlling the first inner cavity and the second inner cavity to be communicated with and disconnected from the outside.

Background

If the box body is not air-tight, the performance of the stored product is reduced and even the product fails. Therefore, it is generally necessary to inspect the airtightness of the case after the case is manufactured.

The invention patent with the application publication number of CN110686841A provides an air tightness detection device and a detection method of a double-cavity structure, although the air tightness detection can be carried out on a box body, the automation degree is low, when the box body is detected, a worker is required to place the box body to be detected on the detection device, and after the detection is finished, the worker is required to take the box body which is detected to be finished off the detection device, so that the detection efficiency is low.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an automatic box airtightness detection system to improve the detection efficiency.

In order to achieve the above object, the present invention provides an automatic box airtightness detection system, comprising:

the first conveying line is used for conveying the box body to be detected;

the detection device is used for carrying out air tightness detection on the box body to be detected;

the second conveying line is used for conveying the box body with qualified air tightness;

the third conveying line is used for conveying the box body with unqualified air tightness; and

and the robot is used for transferring the box to be detected on the first conveying line to the detection device and/or transferring the box detected by the detection device to the second conveying line or the third conveying line.

Further, the detection device includes:

the workbench is provided with a stepped hole, the stepped hole is annular, and the top of the stepped hole is a larger end;

the rotary table is coaxially arranged in the stepped hole and can rotate under the driving of the first driving device;

the detection box is provided with a first inner cavity, one side of the first inner cavity facing the rotary table is communicated with the outside, the detection box is arranged at the top of the rotary table and can perform reciprocating linear motion between a first working position and a second working position under the driving of a second driving device, and when the detection box is at the first working position, the detection box and the rotary table are kept sealed;

the air pump is used for conveying air to the first inner cavity or pumping out the air in the first inner cavity;

the first control valve is used for controlling the connection and disconnection of the air pump and the first inner cavity; and

a first pressure sensor for measuring a pressure of air within the first lumen;

the detection box is arranged at one of the stations.

Further, the detection device further comprises:

the standard tank is arranged between the air pump and the first inner cavity and is communicated with the first inner cavity and the air pump;

a third control valve for controlling the connection and disconnection of the standard tank and the air pump; and

a third pressure sensor for detecting a pressure within the standard tank.

Furthermore, the number of the stations is four, and the four stations correspond to the first conveying line, the detection box, the second conveying line and the third conveying line respectively;

the detection device further comprises: the first pushing device is used for pushing the box body with qualified air tightness onto the second conveying line; and

and the second pushing device is used for pushing the box body with unqualified air tightness onto the third conveying line.

Furthermore, a second inner cavity is arranged on the detection box, the second inner cavity surrounds the periphery of the first inner cavity, one side of the second inner cavity facing the rotary table is communicated with the outside, and the second inner cavity is communicated with the standard tank;

the detection device further comprises:

the second control valve is used for controlling the communication and disconnection of the second inner cavity and the standard tank; and

a second pressure sensor for detecting air pressure within the second lumen.

Further, still include:

the rotary table is provided with a plurality of mounting grooves which are in one-to-one correspondence with the stations, and the sealing cover plates are arranged in the mounting grooves in one-to-one correspondence and are in sliding connection with the rotary table; and

the bottom of any one of the sealing cover plates is provided with the elastic piece, and the natural state has a tendency of enabling the sealing cover plate to move upwards towards the elastic piece.

Further, the air pump is a vacuum pump.

Further, the detection device further comprises a fourth control valve, and the fourth control valve is used for controlling the first inner cavity and the second inner cavity to be communicated with and disconnected from the outside.

The invention has the beneficial effects that:

according to the automatic box body air tightness detection system, the first conveying line, the detection device, the second conveying line, the third conveying line and the robot are arranged, so that automatic detection of the box body is achieved, and detection efficiency is improved. Meanwhile, the box body is comprehensively detected instead of being detected in a sampling mode, and the condition of missing detection is avoided.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a front view of an automatic box airtightness detection system according to a first embodiment of the present invention;

fig. 2 is a perspective view of an automatic box airtightness detection system according to a second embodiment of the present invention;

FIG. 3 is a perspective view of the detecting device of the automatic detecting system for air tightness of box shown in FIG. 1;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is an enlarged view at B shown in FIG. 4;

fig. 6 is a schematic block diagram of the detection apparatus shown in fig. 3.

Reference numerals:

100-a first conveying line, 200-a detection device, 210-a workbench, 220-a rotary table, 230-a detection box, 231-a first inner cavity, 232-a second inner cavity, 240-an air pump, 250-a standard tank, 260-a first pushing device, 261-a first hydraulic oil cylinder, 262-a first push plate, 270-a second pushing device, 271-a second hydraulic oil cylinder, 272-a second push plate, 280-a sealing cover plate, 290-an elastic part, 201-a first control valve, 202-a first pressure sensor, 203-a second control valve, 204-a second pressure sensor, 205-a third control valve, 206-a third pressure sensor, 207-a fourth control valve, 300-a second conveying line, 400-a third conveying line, 500-a robot, 600-box, 700-second driving device, 800-first driving device, 810-gear ring, 820-gear and 830-motor.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1, the present invention provides an automatic box airtightness detection system, which includes a first conveyor line 100, a detection device 200, a second conveyor line 300, a third conveyor line 400, and a robot 500.

The first conveying line 100 is used for conveying the box 600 to be detected. Specifically, the first conveyor line 100 is used to convey the box 600 to be inspected to the robot 500, and then the robot 500 transfers the box 600 to be inspected to the inspection device 200. The detection device 200 is used for detecting the air tightness of the box body 600 to be detected. The second conveying line 300 is used for conveying the airtight qualified box body 600. The third transfer line 400 is used to transfer the airtight-defective tank 600. The robot 500 is used to transfer the box 600 to be inspected on the first conveyor line 100 to the inspection device 200 and/or to transfer the box 600 inspected by the inspection device 200 to the second conveyor line 300 or the third conveyor line 400.

When the box body detection device is used, the first conveying line conveys the box body 600 to be detected to the robot 500, the robot 500 transfers the box body 600 to be detected to the detection device 200, the detection device 200 detects the air tightness of the box body 600, the box body 600 with qualified air tightness detected by the detection device 200 is transferred to the second conveying line 300 by the robot 500 or other conveying devices, and the box body is conveyed by the second conveying line 300; the box 600 with the air tightness being detected by the detecting device 200 is transferred to the third conveyor line 400 by the robot 500 or other conveying device and transported by the third conveyor line 400.

It should be noted here that the second transfer line 300 or the third transfer line 400 may be combined with the first transfer line 100 into one transfer line for the sake of simplicity of structure.

The gas tightness detecting system that this embodiment provided has improved detection efficiency through automated inspection, simultaneously, detects box 600 comprehensively, and the emergence of the condition of having avoided lou examining is detected instead of sampling.

As shown in fig. 2 to 6, however, the above embodiment has disadvantages in that: only after the device 200 to be detected detects one box 600 and moves it away, another box 600 to be detected is placed for detection, and the detection efficiency is still low. Accordingly, in one embodiment, the detection device 200 includes a table 210, a turntable 220, a detection box 230, an air pump 240, a first control valve 201, and a first pressure sensor 202.

Wherein, the workbench 210 is provided with a shoulder hole, which is annular and has a larger top. The turntable 220 is coaxially installed in the stepped hole and can be rotated by the first driving means 800. Specifically, the turntable 220 is adapted to the mounting hole, that is, the turntable 220 is stepped. Mounting the turret 220 within the stepped bore facilitates support and retention of the turret 220. The first driving device 800 includes a gear ring 810, a gear 820 and a motor 830, the gear ring 810 is an inner gear ring or an outer gear ring and is coaxially fixed at the bottom of the turntable 220, the gear 820 is fixed on a power output shaft of the motor 830, and the gear 820 is engaged with the gear ring 830. Of course, in order to control the angle of the motor driving the turntable 220, the motor is a servo motor.

The detection box 230 is opened with a first inner cavity 231, and one side, i.e., the bottom side, of the first inner cavity 231 facing the turntable 220 is communicated with the outside, the detection box 230 is installed at the top of the turntable 220 and can perform reciprocating linear motion between a first working position and a second working position under the driving of the second driving device 700, and when the detection box 230 is at the first working position, the detection box 230 and the turntable 220 are kept sealed. Preferably, the second driving means 700 is a hydraulic cylinder, and the second driving means 700 of this structure is simple in structure and easy to control. Specifically, when the box 600 to be detected is transported to the lower side of the detection box 230, the second driving device 700 drives the detection box 230 to move from the second working position to the first working position, then the air tightness detection is performed on the box, and then the second driving device 700 drives the detection box 230 to move from the first working position to the second working position after the air tightness detection is completed.

The air pump 240 serves to supply air to the first chamber 231 or to evacuate air from the first chamber 231. Specifically, when the detection box 230 is in the first working position, the air pump 240 is used to deliver air into the first internal cavity 231 to increase the air pressure in the first internal cavity 231 or to draw air out of the first internal cavity 231 to decrease the air pressure in the first internal cavity 231.

The first control valve 201 is used to control the connection and disconnection of the air pump 240 with the first inner chamber 231. Specifically, only when the first control valve 201 is opened, the air pump 240 can charge air into the first internal chamber 231 to increase the air pressure in the first internal chamber 231 or suck out the air in the first internal chamber 231 to decrease the air pressure in the first internal chamber 231.

The first pressure sensor 202 is used to measure the air pressure within the first lumen 231. When in use, the air pump 240 changes the air pressure in the first inner cavity 231, because the pressure of the box body 600 placed in the detection box 230 is that the atmospheric pressure is not equal to the air pressure in the first inner cavity 231, if the air tightness of the box body 600 is not good, the air in the first inner cavity 231 or the air in the box body 600 is forced to flow to a place with smaller pressure, specifically, when the air pump 240 charges air into the first inner cavity 231 to increase the air pressure in the first inner cavity 231, if the air tightness of the box body 600 is not good, because the air pressure in the first inner cavity 231 is greater than the air pressure in the box body 600, the air in the first inner cavity 231 is forced to flow into the box body 600, the pressure value in the first inner cavity 231 is reduced, and the change of the value M1 of the first pressure sensor 202 exceeds the preset value; if the sealing performance in the case 600 is good, the pressure value in the first inner cavity 231 will remain unchanged, and the value M1 of the first pressure sensor 202 will change less than the preset value.

Similarly, when the air pump 240 pumps the air in the first cavity 231 to reduce the air pressure in the first cavity 231, if the air tightness of the box body 600 is not good, the air in the box body 600 must flow into the first cavity 231 because the air pressure in the first cavity 231 is lower than the air pressure in the box body 600, and the air pressure value in the first cavity 231 becomes large, so that the value M1 of the first pressure sensor 202 changes beyond the preset value; if the sealing performance in the box 600 is good, the pressure value in the first inner cavity 231 will remain unchanged, and the value M1 of the first pressure sensor 202 will meet the preset value.

Wherein, a plurality of stations are arranged on the rotary table 220, and the detection box is installed at one of the stations. Specifically, by providing a plurality of stations on the turntable 220, after the detection device 200 finishes detecting the box 600 at one of the stations, the first driving device 800 drives the turntable 220 to rotate to transport the detected box 600 away, and simultaneously transports the box 600 at the other station to the lower side of the detection box 230 for detection. While the next box 600 is tested for airtightness, the previously tested box 600 is transferred to the second transfer line 300 or the third transfer line 400 by the robot 500 or another transfer device. Specifically, the airtight qualified box 600 is transported to the second transport line 300, and the airtight unqualified box 600 is transported to the third transport line 400. And simultaneously transfers the cassette 600 to be inspected on the first conveyor line 100 to the turn table 220.

The gas tightness detecting system that this embodiment provided, through setting up revolving stage 220 and set up a plurality of stations on revolving stage 220, make it can detect the box 600 of waiting to incline in addition when the box 600 that will finish detecting is transported away to the detection case 230 below, simultaneously, when carrying out the gas tightness to a box 600, can transport the box 600 that finishes that detects before respectively to second conveying line or third conveying line 400, and transport the box 600 that treats on the first conveying line 100 and wait to detect to the corresponding station on revolving stage 220 on, the unloading time of having saved, thereby further improved detection efficiency.

As shown in fig. 2 to 6, however, the above embodiment has disadvantages in that: whether the air pump 240 fills the first chamber 231 with air or pumps out the air in the first chamber 231, it takes a certain time to make the air pressure in the first chamber 231 reach a predetermined value. Therefore, the detection efficiency is still low. Thus, in one embodiment, the detection device 200 further includes a standard tank 250, a third control valve 205, and a third pressure sensor 206.

Wherein the standard tank 250 is disposed between the air pump 240 and the first inner chamber 231 and communicates with the first inner chamber 231 and the air pump 240. The third control valve 205 is used to control the communication and disconnection of the standard tank 250 and the air pump 240. The third pressure sensor 206 is used to detect the pressure within the standard tank 250.

In use, the third control valve 205 is first opened, the air pump 240 fills air into the standard tank 250 or pumps air out of the standard tank 250, the air pressure in the standard tank 250 reaches a predetermined value as detected by the third pressure sensor 206, and then the third control valve 205 is closed. During the detection, the first control valve 201 is opened, and after the pressures in the first inner chamber 231 and the standard tank 250 are equalized, the first control valve 201 is closed, so that the airtightness detection is performed. Then, the third control valve 205 is opened so that the air pump 240 fills the standard tank 250 with air or pumps out the air in the standard tank 250 so that the pressure value in the standard tank 250 reaches the preset value again.

In the air tightness detection system provided by this embodiment, by setting the standard tank 250, the air pump 240 is used to firstly enable the pressure value in the standard tank 250 to reach the preset value, and during detection, the first control valve 201 is opened to enable the air pressure in the first inner cavity 231 and the air pressure in the standard tank 250 to reach balance, the first control valve 201 is closed, and the pressure change in the first inner cavity 231 is detected by the first pressure sensor 202, so as to perform air tightness detection. In the detection process, the air pump 240 is reused to enable the air pressure value in the standard tank 250 to reach the preset value for the next detection, so that the time for inflating the first inner cavity 231 or pumping the air in the first inner cavity 231 is saved, and the detection efficiency is further improved.

As shown in fig. 2 to 6, however, the above-described airtightness detection system has disadvantages in that: if the number of the stations is only two or three, a more complicated control structure is necessary when the boxes 600 with the air tightness detection are sorted in a qualified and unqualified manner, and if the number of the stations is more than four, the diameter of the rotary table 220 is increased, so that the space occupied by the air tightness detection system is increased. Thus, in one embodiment, the number of stations is four, and the four stations correspond to the first transfer line 100, the inspection box 230, the second transfer line 300, and the third transfer line 400, respectively.

The detection device 200 further comprises a first pushing device 260 and a second pushing device 270.

The first pushing device 260 is configured to push the box with qualified air tightness onto the second conveying line 300. Specifically, the first pushing device 260 includes a first hydraulic cylinder 261 fixedly mounted on the worktable 210, and a first push plate 262 slidably mounted on the worktable 210 and driven by the first hydraulic cylinder 261 to perform a reciprocating linear motion. The second pushing device 270 is used for pushing the box 600 with unqualified air tightness onto the third conveying line 400. Specifically, the second pushing device 270 includes a second hydraulic cylinder 271 and a second push plate 272, the second hydraulic cylinder 271 is fixedly installed on the workbench 210, and the second push plate 272 is slidably installed on the workbench 210 and can be driven by the second hydraulic cylinder to perform a reciprocating linear motion.

This embodiment is through setting up four stations, and four stations correspond first transfer chain 100, detection case 230, second transfer chain 300 and third transfer chain 400 respectively for to the material loading of waiting to detect box 600, the gas tightness detects, the unqualified box 600 unloading of gas tightness and the unloading of the qualified box 600 of gas tightness goes on in an orderly manner, has improved the efficiency that detects.

As shown in fig. 2 to 6, however, the above-described airtightness detection system has disadvantages in that: the airtightness between the detection box rotary table 220 cannot be detected, so that the detection effect is poor, and the detection efficiency is low. Therefore, in one embodiment, the detection box 230 is provided with a second inner cavity 232, the second inner cavity 232 is surrounded on the periphery of the first inner cavity 231, a side of the second inner cavity 232 facing the turntable 220 is communicated with the outside, and the second inner cavity 232 is communicated with the standard tank 250.

The detection device 200 further includes a second control valve 203 and a second pressure sensor 204.

The second control valve 203 is used for controlling the connection and disconnection of the second inner cavity 232 and the standard tank 250. The second pressure sensor 204 is configured to sense air pressure within the second lumen 232.

When the air pressure gauge is used, the second control valve 203 is opened, so that the second inner cavity 232 is communicated with the standard tank 250, after a certain time, namely the air pressure between the second inner cavity 232 and the standard tank 250 is equalized, the second control valve 203 is closed, the change of the value M2 of the second pressure sensor 204 is checked, if the change of M2 is larger than a preset value, the air leakage of the second inner cavity 232 is indicated, namely the air tightness of the system is poor, and otherwise, the air tightness of the system is good. Specifically, when the value M1 of the first pressure sensor 202 does not change while the value M2 of the second pressure sensor 204 changes beyond the preset value, it indicates that the air tightness of the outside of the second cavity 232 is not good, and if the value M2 of the second pressure sensor 204 changes beyond the preset value, which causes a change in the value M1 of the first pressure sensor 202, it indicates that the air tightness of the inside of the second cavity 232 is not good.

If the air tightness of the second inner cavity 232 is good, the first control valve 201 is continuously opened, the standard tank 250 is communicated with the first inner cavity 231, after a certain time, the first control valve 201 is closed, and at the moment, the air pressure in the standard tank 250 and the air pressure in the first inner cavity 231 reach equilibrium. Observing the value M1 of the first pressure sensor 202, and if the change of the value M1 of the first pressure sensor 202 is larger than a preset value, indicating that the air tightness of the tank body is not qualified; otherwise, the air tightness is qualified.

As shown in fig. 2 to 6, however, the above-described airtightness detection system has disadvantages in that: utilize hydraulic cylinder drive detection case 230 to be close to revolving stage 220 and with revolving stage 220 in close contact with and keep sealed, when hydraulic cylinder drive detection case 230 moved to extreme position, if the contact between revolving stage 220 and the detection case 230 is not inseparable enough to make sealed effect relatively poor, and then influence detection efficiency, if detection case 230 contacts too inseparable with revolving stage 220 and makes to produce great elasticity between detection case 230 and revolving stage 220, thereby very easily cause the damage to detection case 230 and revolving stage 220 and influence the gas tightness between detection case 230 and revolving stage 220, and then increase maintenance time, influence detection efficiency. In one embodiment, a sealing cover 280 and a resilient member 290 are also included.

Wherein, a plurality of mounting grooves corresponding to a plurality of stations one-to-one are opened on the revolving stage 220, and a plurality of sealing cover plates 280 are correspondingly mounted in a plurality of mounting grooves one-to-one and are connected with the revolving stage 220 in a sliding manner. The elastic member 290 is installed at the bottom of any one of the sealing cover 280, and the elastic member 290 has a tendency to move the sealing cover 280 upward in a natural state.

In use, the hydraulic cylinder drives the detection box 230 to approach the sealing cover plate 280, in the process, the detection box 230 pushes the sealing cover plate 280 to compress the elastic member 290 so as to absorb the pressure applied to the sealing cover plate 280 by the detection box 230, and meanwhile, under the action of the elastic force of the elastic member 290, the sealing cover plate 280 is in close contact with the detection box 230 so as to maintain the sealing.

By adopting the structure, the detection box 230 can be tightly contacted with the sealing cover plate 280 through the elasticity of the elastic piece 290 to keep sealing, and the pressure exerted on the sealing cover by the detection box 230 body can be absorbed through the elastic piece 290, so that the possibility of damage to the detection box 230 or the sealing cover plate 280 due to overlarge time pressure of the detection box 230 on the sealing cover plate 280 is reduced, the maintenance time is reduced, and the detection efficiency is improved.

As shown in fig. 2 to 6, however, the above-described airtightness detection system has disadvantages in that: if the air pump 240 is a booster pump, the pressure in the first inner cavity 231 and the second inner cavity 232 must be greater than the atmospheric pressure, so as to push the sealing cover plate 280 to compress the elastic member 290, thereby affecting the sealing performance between the detection box and the sealing cover plate 280, and reducing the detection result. Thus, in one embodiment, the air pump 240 is a vacuum pump. The pressure in the first and second cavities 231 and 232 is lower than the atmospheric pressure by the vacuum, and the sealing cover plate 280 and the detection box 230 are further brought into close contact with each other by the atmospheric pressure, thereby increasing the airtightness between the sealing cover plate 280 and the detection box 230.

As shown in fig. 2 to 6, however, the above-described airtightness detection system has disadvantages in that: during the air tightness detection, the pressure in the first inner cavity 231 and the second inner cavity 232 is less than the atmospheric pressure, so that the detection box 230 is not easily separated from the sealing cover plate 280 after the detection is completed, if the forced separation is most likely to affect the air tightness between the detection box 230 and the sealing cover plate 280, the elastic member 290 and the like are also likely to be damaged, thereby increasing the maintenance time, reducing the detection efficiency, increasing the time for separating the detection box 230 from the sealing cover plate 280, and lowering the detection efficiency. Therefore, in one embodiment, the detection device 200 further comprises a fourth control valve 207, and the fourth control valve 207 is used for controlling the first inner cavity 231 and the second inner cavity 232 to be communicated with and disconnected from the outside. During the use, detect the back that finishes, open fourth control valve 207 for first inner chamber 231 and second inner chamber 232 and external intercommunication, thereby make the pressure in first inner chamber 231 and the pressure in the second inner chamber 232 equal, so that part test box 230 with sealed apron 280, reduced the separation time of sealed apron 280 with test box 230, improved detection efficiency. Meanwhile, the detection box 230 and the sealing cover plate 280 are easy to separate, so that the sealing performance between the detection box 230 and the sealing cover plate 280 is not easily influenced, the maintenance time is reduced, and the detection efficiency is improved.

Of course, the box body air tightness detection system further comprises a control system.

In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.