CN214894095U

CN214894095U - Pressure testing device

Info

Publication number: CN214894095U
Application number: CN202120527604.7U
Authority: CN
Inventors: 蒋安国; 丁力伟; 朱倩; 文刘阳; 范厚
Original assignee: Hunan Zhuangyao Photoelectric Technology Co ltd
Current assignee: Hunan Zhuangyao Photoelectric Technology Co ltd
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2021-11-26
Anticipated expiration: 2031-03-12

Abstract

The utility model relates to a pressure test device, pressure test device include body, atmospheric pressure adjusting part and electric connector, and this internal cavity forms the inclosed chamber that holds that is used for acceping the piece of waiting to test, and atmospheric pressure adjusting part connects in the body to with hold the chamber intercommunication, atmospheric pressure adjusting part is constructed for being used for adjusting the atmospheric pressure that holds the intracavity, and electric connector connects in the body, and is constructed for being used for the electric connection to wait to test piece and external terminal. The utility model provides a pressure test device can test the zero offset precision of the laser gyro under the atmospheric pressure environment that is in the difference to judge whether reliable when the laser gyro is under the atmospheric pressure environment of difference.

Description

Pressure testing device

Technical Field

The utility model relates to a test technical field especially relates to a pressure test device.

Background

The laser gyro is a high-precision measuring device for measuring the angular displacement of an object by using the optical path difference of laser beams, and the laser gyro is widely applied to equipment such as submarines, airplanes and the like along with the development of laser technology. Before the laser gyro leaves a factory, the zero offset precision of the laser gyro in different air pressure environments needs to be tested, so that whether the zero offset precision of the laser gyro in the different air pressure environments meets the standard or not can be conveniently known. Therefore, it is a problem to be solved urgently how to provide a testing device capable of testing the zero offset precision of the laser gyroscope in different air pressure environments to determine whether the laser gyroscope is reliable in different air pressure environments.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a pressure testing apparatus capable of testing the zero offset accuracy of the laser gyro in different atmospheric pressure environments to determine whether the laser gyro is reliable in different atmospheric pressure environments.

A pressure testing device, the pressure testing device comprising:

the body is hollow, and a closed accommodating cavity for accommodating a piece to be tested is formed in the body;

an air pressure regulating assembly coupled to the body and communicating with the accommodating cavity, the air pressure regulating assembly being configured to regulate air pressure within the accommodating cavity; and

an electrical connector coupled to the body and configured to electrically connect the test piece to an external terminal.

In one embodiment, the air pressure adjusting assembly includes an adjusting driving member and an adjusting pipe, the adjusting driving member is communicated with the accommodating cavity through the adjusting pipe, and the adjusting driving member is configured to increase or decrease the air pressure in the accommodating cavity.

In one embodiment, the air pressure adjustment assembly includes a pressure test piece configured to detect an actual air pressure value within the receiving cavity upon activation of the adjustment drive.

In one embodiment, the air pressure adjusting assembly further includes an air inlet valve, and the air inlet valve is coupled to the adjusting pipeline and used for opening and closing the communication between the adjusting driving member and the accommodating cavity.

In one embodiment, the air pressure adjusting assembly further comprises an exhaust valve, and the exhaust valve is coupled to the adjusting pipeline and used for opening and closing communication between the outside and the accommodating cavity.

In one embodiment, the body includes a containing body and a cover body, the containing body is a hollow structure with an open end and a closed end, and the cover body detachably covers the open end of the containing body and encloses with the inner wall of the containing body to form the containing cavity.

In one embodiment, the container further comprises a fitting, the body further comprises a mounting body arranged around the periphery of the accommodating main body, and the mounting body and the cover body are detachably connected through the fitting.

In one embodiment, the container further comprises a sealing member clamped between the open end of the containing body and the cover body.

In one embodiment, the surface of the sealing member facing the receiving body is recessed to form an annular groove, and the open end is captured in the annular groove.

In one embodiment, the test device further comprises a support member detachably coupled in the accommodating cavity, and the test piece is detachably coupled on the support member.

When the pressure testing device is used for performance testing, the to-be-tested piece is sealed in the containing cavity, the to-be-tested piece is connected with the external terminal through the electric connecting piece, the to-be-tested value of the to-be-tested piece is transmitted and displayed on the terminal, then the air pressure adjusting assembly inputs or extracts air into or from the containing cavity, so that the air pressure in the containing cavity changes, meanwhile, whether the difference value between the to-be-tested value after the air pressure adjusting assembly is started and the to-be-tested value before the air pressure adjusting assembly is started is within a preset range is observed, if yes, the to-be-tested piece has better reliability in the air pressure environment, and if not, the to-be-tested piece has lower reliability in the air pressure environment.

Drawings

Fig. 1 is a schematic structural diagram of a pressure testing apparatus according to an embodiment of the present invention;

FIG. 2 is a top view of the pressure testing apparatus shown in FIG. 1;

FIG. 3 is a front view of the pressure testing apparatus shown in FIG. 1;

FIG. 4 is a cross-sectional view of the pressure testing apparatus of FIG. 3 taken along the direction A-A with the electrical connectors removed;

FIG. 5 is an exploded view of the pressure testing apparatus shown in FIG. 1;

fig. 6 is a front view of the pressure testing apparatus shown in fig. 5.

100. A pressure testing device; 10. a body; 11. an accommodating chamber; 12. a housing body; 121. an open end; 123. a bottom wall; 13. a cover body; 14. an installation body; 20. an air pressure regulating assembly; 22. adjusting the pipeline; 221. A first conditioning duct; 223. a second conditioning duct; 23. a pressure test piece; 232. a first pressure test piece; 234. a second pressure test piece; 24. an intake valve; 241. a first intake valve; 243. a second intake valve; 25. an exhaust valve; 252. a first exhaust valve; 254. a second exhaust valve; 30. an electrical connection; 40. an assembly member; 50. a seal member; 51. an annular groove; 60. a support member; 70. a mounting member; 80. a fixing member; 200. A test piece to be tested; 210. a bottom; 220. a top portion.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "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, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. 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.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 and 4, the present application provides a pressure testing apparatus 100, where the pressure testing apparatus 100 is used for performing a performance test on a to-be-tested device 200 in different air pressure environments, specifically, the to-be-tested device 200 may be a laser gyro, and the pressure testing apparatus 100 can test zero offset precision of the laser gyro in different air pressure environments to determine whether the laser gyro is reliable in different air pressure environments.

Referring to fig. 6, the pressure testing apparatus 100 includes a body 10, an air pressure adjusting assembly 20 and an electrical connector 30, wherein the body 10 is used for providing a mounting base for the air pressure adjusting assembly 20 and the electrical connector 30, a closed accommodating cavity 11 for accommodating the to-be-tested device 200 is formed in the body 10 in a hollow manner, the air pressure adjusting assembly 20 is coupled to the body 10 and is communicated with the accommodating cavity 11, the air pressure adjusting assembly 20 is configured for adjusting the air pressure in the accommodating cavity 11, and the electrical connector 30 is coupled to the body 10 and is configured for electrically connecting the to-be-tested device 200 and an external terminal.

In the pressure testing apparatus 100, during performance testing, the to-be-tested piece 200 is sealed in the accommodating cavity 11, and the electrical connector 30 connects the to-be-tested piece 200 with an external terminal, so as to transmit and display a value to be tested of the to-be-tested piece 200 on the terminal, then the air pressure adjusting assembly 20 inputs or extracts air into or from the accommodating cavity 11, so that the air pressure in the accommodating cavity 11 changes, and meanwhile, whether a difference value between the value to be tested after the air pressure adjusting assembly 20 is started and the value to be tested before the air pressure adjusting assembly 20 is started is within a preset range is observed, if so, the to-be-tested piece 200 has better reliability in the air pressure environment, and if not, the to-be-tested piece 200 has lower reliability in the air pressure environment.

Specifically, under the condition of ignoring the error, before the air pressure adjusting assembly 20 is not started, the air pressure in the to-be-tested piece 200 is considered to be normal pressure, at this time, the to-be-tested value displayed on the terminal is defined as a standard value, after the air pressure adjusting assembly 20 is started, the air pressure in the accommodating cavity 11 changes, and after the air pressure adjusting assembly 20 is started, the to-be-tested values displayed on the terminal are all real-time measured values under different air pressure environments. If the difference between the real-time measurement value and the standard value is within the preset range, it indicates that the piece to be tested 200 has better reliability in the air pressure environment corresponding to the real-time measurement value, and if the difference between the real-time measurement value and the standard value is outside the preset range, it indicates that the piece to be tested 200 has poorer reliability in the air pressure environment corresponding to the real-time measurement value. For example, assuming that the air pressure in the accommodating chamber 11 is increased to a first air pressure by the air pressure adjusting assembly 20, and the first air pressure is greater than the normal pressure, at a certain time, assuming that the first air pressure is 110KPa, the real-time measured value is 0.04 at 110KPa, and the standard value is 0.03 at the normal pressure, the difference between the real-time measured value and the standard value is 0.01. If the predetermined range is 0 to 0.005, and 0.01 is out of the predetermined range, it means that the reliability of the device under test 200 is low in the atmospheric pressure environment with the atmospheric pressure of 110 KPa. It is worth mentioning that the preset range may be a specific numerical range, or may be zero.

Specifically, the electrical connector 30 may be an internal and external adapter, one end of the internal and external adapter extends into the accommodating cavity 11 and is electrically connected to the to-be-tested piece 200, and the other end of the internal and external adapter penetrates through the body 10 and partially protrudes out of the body 10 so as to be electrically connected to the terminal. Alternatively, the terminal may be a mobile phone, a computer, or the like.

Referring to fig. 2 and 3, in particular, the air pressure adjusting assembly 20 includes an adjusting driving member and an adjusting pipe 22, the adjusting driving member is communicated with the accommodating cavity 11 through the adjusting pipe 22, and the adjusting driving member is configured to increase or decrease the air pressure in the accommodating cavity 11. Specifically, the adjusting driving member may be an air pump, and the adjusting driving member inputs air into the accommodating chamber 11 through the adjusting pipeline 22, so as to pressurize the accommodating chamber 11, or the adjusting driving member extracts part or all of the air in the accommodating chamber 11 through the adjusting pipeline 22, so as to depressurize the accommodating chamber 11. Through adjusting the driving piece and adjusting the pipeline 22, the containing cavity 11 can be pressurized or depressurized conveniently, so as to adjust the air pressure in the containing cavity 11.

Optionally, the number of the adjusting driving members may be one or at least two, and correspondingly, the number of the adjusting pipelines 22 is equal to the number of the adjusting driving members, preferably, the number of the adjusting driving members and the number of the adjusting pipelines 22 are two, it is defined that the two adjusting driving members are a first adjusting driving member and a second adjusting driving member respectively, the two adjusting pipelines 22 are a first adjusting pipeline 221 and a second adjusting pipeline 223 respectively, the first adjusting driving member and the first adjusting pipeline 221 are communicated to form a pressurization channel for gas transmission and pressurization of the accommodating cavity 11, and the second adjusting driving member and the second adjusting pipeline 223 are communicated to form a pressure reduction channel for air suction and pressure reduction of the accommodating cavity 11. Through setting up two regulation driving pieces and two regulation pipelines 22, and will hold the pressure boost passageway and the separation of decompression passageway in the chamber 11, when the too big atmospheric pressure in the chamber 11 that leads to of the gas volume of pressure boost passageway input, the decompression passageway is opened to the accessible, can reduce the atmospheric pressure in holding the chamber 11, when the gas volume that the decompression passageway was taken out from too much leads to holding the chamber 11 internal gas pressure too little, the pressure boost passageway is opened to the accessible, with the increase atmospheric pressure in holding the chamber 11, so that the atmospheric pressure in holding the chamber 11 accords with test standard. For example, when the second adjustment drive is activated, the air pressure in the accommodating chamber 11 is reduced to 90KPa, and the actual user wants to measure the reliability of the test piece 200 at 95KPa, so that the first adjustment drive can be opened to pressurize the air input in the accommodating chamber 11, so that the air pressure in the accommodating chamber 11 is increased to 95 KPa. It can be seen that the air pressure in the accommodating cavity 11 is adjusted more accurately by providing two adjusting driving members and two adjusting pipelines 22. In the following embodiments, two adjusting driving members and two adjusting pipes 22 are taken as examples.

Further, the air pressure regulating assembly 20 further comprises a pressure test piece 23, the pressure test piece 23 being configured for detecting an actual air pressure value within the receiving cavity 11 upon activation of the regulating drive, so that the real-time measured value may correspond to the actual air pressure value. For example, when the real-time measurement value displayed on the terminal is 0.04 and the pressure test piece 23 displays 110KPa, it can be known that the real-time measurement value is 0.04 at 110 KPa. Of course, in some embodiments, the pressure testing piece 23 may also be electrically connected to the terminal, and the actual air pressure value measured by the pressure testing piece 23 is displayed on the terminal.

Alternatively, the pressure test piece 23 may be coupled to the body 10, or may be coupled to the adjustment duct 22. The pressure testing piece 23 may be a positive pressure gauge or a negative pressure gauge, for example, if the adjusting driving piece is used to pressurize the accommodating cavity 11, the pressure testing piece 23 is a positive pressure gauge, if the adjusting driving piece is used to depressurize the accommodating cavity 11, the pressure testing piece 23 is a negative pressure gauge, if the adjusting driving piece is two, one is used to pressurize, and the other is used to depressurize, the corresponding pressure testing piece 23 is also two, one is a positive pressure gauge, and one is a negative pressure gauge. In the following embodiments, two pressure testing units 23 are used, the two pressure testing units 23 are respectively a first pressure testing unit 232 and a second pressure testing unit 234, the first pressure testing unit 232 is a positive pressure gauge and is connected to the first adjusting pipe 221, and the second pressure testing unit 234 is a negative pressure gauge and is connected to the second adjusting pipe 223.

Further, the air pressure adjusting assembly 20 further comprises an air inlet valve 24, and the air inlet valve 24 is coupled to the adjusting pipe 22 and is used for opening and closing the communication between the adjusting driving member and the accommodating cavity 11. Specifically, the air inlet valve 24 is opened, the adjusting driving member can deliver air or evacuate air into the accommodating cavity 11, the air inlet valve 24 is closed, and the air is sealed in the accommodating cavity 11 to maintain the stability of the air pressure. Specifically, the intake valve 24 includes a first intake valve 241 and a second intake valve 243, the first intake valve 241 is coupled to the first adjusting pipe 221 and is configured to open and close the communication between the first adjusting driving member and the accommodating chamber 11, and the second intake valve 243 is coupled to the second adjusting pipe 223 and is configured to open and close the communication between the second adjusting driving member and the accommodating chamber 11.

Further, the air pressure adjusting assembly 20 further includes an exhaust valve 25, and the exhaust valve 25 is coupled to the adjusting pipe 22 and is used for opening and closing the communication between the outside and the accommodating chamber 11. Specifically, if the air pressure in the accommodating cavity 11 is greater than the external air pressure, and the exhaust valve 25 is opened, the air in the accommodating cavity 11 leaks to the outside, so that the pressure in the accommodating cavity 11 can be relieved, and the air pressure in the accommodating cavity 11 is reduced to the air pressure value required by the test or reduced to the normal pressure; if the air pressure in the accommodating cavity 11 is lower than the external air pressure, the exhaust valve 25 is opened, so that the external air can flow into the accommodating cavity 11, and the air pressure in the accommodating cavity 11 is increased to the air pressure value or the normal pressure required by the test. It can be seen that, by opening the exhaust valve 25, the air pressure in the accommodating chamber 11 can be adjusted, so that the air pressure in the accommodating chamber 11 is adjusted to the air pressure value required by the test or is restored to the normal pressure. Compared with the method that the accommodating cavity 11 is pressurized or depressurized by operating the adjusting driving piece, so that the air pressure in the accommodating cavity 11 can be adjusted to the air pressure value required by the test or recovered to the normal pressure, the operation can reduce the starting of the adjusting driving piece, is convenient for prolonging the service life of the adjusting driving piece, and is also convenient for energy conservation and emission reduction.

It is understood that the adjusting pipe 22 includes a main pipe and a branch pipe, the main pipe is used for communicating the adjusting driving member and the accommodating chamber 11, the air inlet valve 24 is coupled to the main pipe, the branch pipe is used for communicating the outside and the accommodating chamber 11, and the air outlet valve 25 is coupled to the branch pipe. Specifically, the exhaust valve 25 includes a first exhaust valve 252 and a second exhaust valve 254, the first intake valve 241 is coupled to the main pipe of the first adjusting pipe 221, the second intake valve 243 is coupled to the main pipe of the second adjusting pipe 223, the first exhaust valve 252 is coupled to the branch pipe of the first adjusting pipe 221, and the second exhaust valve 254 is coupled to the branch pipe of the second adjusting pipe 223.

Referring to fig. 5 and fig. 6 again, in particular, the main body 10 includes a containing main body 12 and a cover 13, the containing main body 12 is a hollow structure with an open end and a closed end, the cover 13 detachably covers the open end 121 of the containing main body 12, and forms a containing cavity 11 with the inner wall of the containing main body 12. The cover body 13 is detached from the opening end 121, so that the test piece 200 can be conveniently assembled and disassembled, and the cover body 13 covers the opening end 121, so that the test piece 200 can be sealed in the accommodating cavity 11, and the performance test of the test piece 200 can be conveniently carried out.

Further, the pressure testing apparatus 100 further includes a fitting 40, the body 10 further includes a mounting body 14 disposed around the outer circumference of the accommodating main body 12, and the mounting body 14 and the cover 13 are detachably connected by the fitting 40. By providing the fitting 40 and the mounting body 14, the reliability and the tightness of the connection between the cover 13 and the main body 10 can be further improved, and the cover 13 can be prevented from falling off the main body 10.

Referring to fig. 4 again, further, the mounting body 14 extends along the outer periphery of the accommodating main body 12 and forms a closed ring structure, the number of the mounting members 40 is at least two, and the at least two mounting members 40 are spaced apart from each other along the extending direction of the mounting body 14, so that the cover 13 and the body 10 are more firmly mounted.

Alternatively, the fitting 40 may be a pin, bolt, or the like. The mounting body 14 and the cover 13 are provided with connection holes at positions opposite to each other, and the assembly member 40 is inserted into the connection holes at positions corresponding to the mounting body 14 and the cover 13.

Referring to fig. 4 again, the pressure testing apparatus 100 further includes a sealing member 50, and the sealing member 50 is clamped between the open end 121 of the accommodating body 12 and the cover 13. When the cover 13 is mounted on the accommodating body 12, the sealing element 50 can seal the mounting gap between the accommodating body 12 and the cover 13 to prevent gas from leaking from the mounting gap, so that the pressure in the accommodating cavity 11 can be maintained in a stable state during the testing process, thereby facilitating the improvement of the accuracy and reliability of the testing. Specifically, the sealing member 50 may be a rubber member, a silicone member, or the like.

Further, the sealing member 50 is recessed toward the surface of the accommodating main body 12 to form an annular groove 51, and the open end 121 is held in the annular groove 51. By arranging the annular groove 51, the reliability of the installation of the sealing element 50 and the body 10 can be effectively improved, so that the sealing element 50 is prevented from shifting or falling in the installation process, and the test accuracy and reliability of the test device are further improved. Moreover, the annular groove 51 is provided, when the cover 13 covers the opening end 121, the sealing element 50 can be sealed between the cover 13 and the sealing element 50 along the circumferential direction of the body 10, so that the sealing effect of the sealing element 50 can be improved.

Further, the sealing member 50 is of an annular structure, and the sealing member 50 seals a gap between the opening end 121 and the cover 13 along a circumferential direction of the opening end 121, and does not block the input and extraction of the gas.

The pressure testing apparatus 100 further includes a support member 60, the support member 60 is detachably coupled in the receiving chamber 11, and the test piece 200 is detachably coupled to the support member 60. Specifically, the test piece 200 is detachably fixed to the support member 60 by the mounting member 70, and the support member 60 is detachably fixed to the bottom wall 123 of the containing body 12 facing the lid body 13 by the fixing member 80. Optionally, the supporting member 60 is a plate-like structure, and optionally, the mounting member 70 and the fixing member 80 may be pins, bolts, and the like. It will be appreciated that, in order to increase the applicability of the pressure testing device 100, the receiving cavity 11 in the body 10 generally has a larger volume, so that it is convenient to receive different volumes of the test pieces 200 to be tested. If the volume of the test object 200 is too small, the test object 200 is easily shaken when being accommodated in the accommodating chamber 11, which may reduce the reliability of the test and even damage the test object 200. By providing the supporting member 60, the parts to be tested 200 with different volumes can be stably installed in the accommodating chamber 11, so that the reliability of the subsequent test can be improved.

In addition, the to-be-tested device 200 has a bottom portion 210 and a top portion 220 opposite to each other, when the to-be-tested device 200 is accommodated in the accommodating cavity 11, the bottom portion 210 is disposed away from the cover 13, and the top portion 220 is disposed close to the cover 13, for the convenience of installation, generally, the electrical connector 30 is coupled to the top portion 220 of the to-be-tested device 200 and penetrates through the cover 13, if the to-be-tested device 200 is directly fixed in the accommodating body 12 by the mounting member 70, the to-be-tested device 200 needs to penetrate through the to-be-tested device 200 from the top portion 220 to the bottom portion 210, and then the to-be-tested device is fixed to the bottom wall 123, so that the mounting member 70 is likely to damage the components inside the to-be-tested device. The supporting member 60 is disposed, the supporting member 60 contacts with the bottom 210 of the device under test 200, the mounting member 70 is used to penetrate the supporting member 60 from the side of the supporting member 60 opposite to the device under test 200 and contacts with the bottom 210 of the device under test 200, so as to mount the supporting member 60 and the device under test 200, and then the fixing member 80 penetrates the supporting member 60 from the side of the supporting member 60 facing the device under test 200 and mounts the supporting member 60 on the bottom wall 123, so as to finally mount the device under test 200. Therefore, by arranging the supporting piece 60, the test piece 200 can be prevented from being damaged in the installation process on the premise of ensuring the installation stability of the test piece 200, and better installation reliability is achieved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A pressure testing device, comprising:

2. The pressure testing apparatus of claim 1, wherein the air pressure adjustment assembly includes an adjustment drive and an adjustment conduit, the adjustment drive communicating with the receiving cavity through the adjustment conduit, the adjustment drive configured to increase or decrease the air pressure within the receiving cavity.

3. A pressure testing device as claimed in claim 2, wherein the air pressure adjustment assembly comprises a pressure test piece configured to detect an actual air pressure value within the receiving cavity upon activation of the adjustment drive.

4. The pressure testing device of claim 2, wherein the air pressure adjusting assembly further comprises an air inlet valve coupled to the adjusting conduit and configured to open and close communication between the adjusting actuator and the receiving cavity.

5. The pressure testing device of claim 2, wherein the air pressure regulating assembly further comprises an air vent valve coupled to the regulating pipe and configured to open and close communication between the outside and the accommodating chamber.

6. The pressure testing device of claim 1, wherein the body comprises a containing main body and a cover body, the containing main body is a hollow structure with an open end and a closed end, and the cover body detachably covers the open end of the containing main body and encloses with the inner wall of the containing main body to form the containing cavity.

7. The pressure testing apparatus of claim 6, further comprising a fitting, wherein the body further comprises a mounting body disposed around an outer periphery of the housing body, the mounting body and the cover being removably coupled by the fitting.

8. The pressure testing apparatus of claim 7, further comprising a seal member sandwiched between the open end of the containment body and the cover.

9. The pressure testing apparatus of claim 8, wherein a surface of the sealing member facing the containment body is recessed to form an annular groove, the open end being captured within the annular groove.

10. The pressure testing apparatus of claim 1, further comprising a support member detachably coupled to the accommodating chamber, wherein the test piece is detachably coupled to the support member.