CN218178009U

CN218178009U - Pneumatic control valve for air tightness test

Info

Publication number: CN218178009U
Application number: CN202220736191.8U
Authority: CN
Inventors: 郑维海; 王河莉; 李德好
Original assignee: Dongguan Onex Technology Co ltd
Current assignee: Dongguan Onex Technology Co ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-12-30
Anticipated expiration: 2032-03-30

Abstract

The utility model discloses a pneumatic control valve for air tightness test, which comprises a valve seat and a micro cylinder; the valve seat comprises a gas circuit, a cylinder mounting hole, a valve seat body and a sensor interface embedded in the valve seat body; the air passage is arranged in the valve seat body; the cylinder mounting hole is embedded in the surface of the valve seat body; the air passage penetrates through the air cylinder mounting hole, and the micro air cylinder and the air cylinder mounting hole are matched to realize the control of the on-off of the air passage; at least one gas circuit is connected with the sensor interface. The utility model adopts the above structure, realize control gas circuit break-make, regulation and control gas flow direction and break-make effectively prevent that the solenoid valve from generating heat and influencing the sensor precision.

Description

Pneumatic control valve for air tightness test

Technical Field

The utility model relates to a gas accuse valve technical field, concretely relates to gas accuse valve for gas tightness test.

Background

In the prior art, as the use environment tends to be diversified and complicated, many products have requirements on air tightness, such as filters which are used outdoors, in deep water and other environments, and electronic devices which need to be subjected to protection measures such as dust prevention and water prevention.

The existing pneumatic control valve judges whether a tested product is qualified or not by utilizing the pressure difference of a sensor. However, the existing pneumatic control valve adopts the electromagnetic valve to control the on-off of the air path, the heat generated in the working process of the electromagnetic valve can influence the precision of the sensor, and the accuracy of pressure difference judgment is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to disclose a gas accuse valve for gas tightness test, solved current gas accuse valve solenoid valve and generated heat the problem that influences the sensor precision

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a pneumatic control valve for air tightness testing comprises a valve seat and a micro cylinder; the valve seat comprises a gas circuit, a cylinder mounting hole, a valve seat body and a sensor interface embedded in the valve seat body;

the air passage is arranged in the valve seat body; the cylinder mounting hole is embedded in the surface of the valve seat body; the air passage penetrates through the air cylinder mounting hole, and the micro air cylinder and the air cylinder mounting hole are matched to realize the control of the on-off of the air passage; at least one air passage is connected with the sensor interface.

Further, the micro air cylinder comprises a first micro air cylinder, a second micro air cylinder, a third micro air cylinder, a fourth micro air cylinder and a fifth micro air cylinder;

the gas path comprises a first gas path, a second gas path, a third gas path, a fourth gas path and a fifth gas path;

the cylinder mounting holes comprise a first cylinder mounting hole, a second cylinder mounting hole, a third cylinder mounting hole, a fourth cylinder mounting hole and a fifth cylinder mounting hole;

the first air path, the second air path, the third air path, the fourth air path and the fifth air path are arranged in the valve seat body; the first cylinder mounting hole, the second cylinder mounting hole, the third cylinder mounting hole, the fourth cylinder mounting hole and the fifth cylinder mounting hole are embedded in the surface of the valve seat body;

the first air passage penetrates through the first air cylinder mounting hole, and the first miniature air cylinder is matched with the first air cylinder mounting hole to control the first air passage to be switched on and off; the second air path penetrates through the second air cylinder mounting hole, and the second micro air cylinder is matched with the second air cylinder mounting hole to realize the control of the on-off of the second air path; the third air path penetrates through a third air cylinder mounting hole, and the third micro air cylinder is matched with the third air cylinder mounting hole to realize the control of the on-off of the third air path; the fourth air passage passes through a fourth air cylinder mounting hole, and the fourth micro air cylinder is matched with the fourth air cylinder mounting hole to control the fourth air passage to be switched on and off; and the fifth air passage passes through the fifth air cylinder mounting hole, and the fifth micro air cylinder and the fifth air cylinder mounting hole are matched to control the on-off of the fifth air passage.

Furthermore, the valve seat body is of a square structure, the top surface of the valve seat body comprises a first top surface and a second top surface, the first top surface is higher than the second top surface, and the first top surface and the second top surface are connected to enable the top surface of the valve seat body to form a stepped structure;

the first cylinder mounting hole and the second cylinder mounting hole are formed in the first top surface, the first micro cylinder is inserted into the first cylinder mounting hole, and the second micro cylinder is inserted into the second cylinder mounting hole;

the third cylinder mounting hole and the fourth cylinder mounting hole are formed in the second top surface, the third micro cylinder is inserted into the third cylinder mounting hole, and the fourth micro cylinder is inserted into the fourth cylinder mounting hole;

and the right surface of the valve seat body is provided with the fifth cylinder mounting hole.

Further, the first end of the first air path is arranged on the right side of the valve seat body, the first end of the first air path is connected with the air storage tank, the second end of the first air path is communicated with the sensor interface, and the sensor interface is embedded in the left side of the valve seat body.

Further, the first end of the second air path is arranged on the left surface of the valve seat body, and the first end of the second air path is connected with the joint;

the second end of the second air passage is communicated with the middle part of the first air passage; the second end of the second air passage is located between the first cylinder mounting hole and the second end of the first air passage.

Furthermore, the first end of the third air path is communicated with the test interface on the first top surface, and the second end of the third air path is communicated with the first air path.

Further, a first end of the fourth air path is communicated with the second air path, and the first end of the fourth air path is located between the second cylinder mounting hole and a second end of the second air path;

and the second end of the fourth air path is arranged on the left surface of the valve seat body, and the second end of the fourth air path is connected with the joint.

Furthermore, the first end of the fifth air passage is communicated with the fourth air passage, the second end of the fifth air passage is arranged on the left surface of the valve seat body, and the second end of the fifth air passage is connected with the joint; and the first end of the fifth air path is positioned between the fourth cylinder mounting hole and the second end of the fourth air path.

The first micro air cylinder, the second micro air cylinder, the third micro air cylinder, the fourth micro air cylinder and the fifth micro air cylinder are respectively connected with the control device.

Further, the first cylinder mounting hole, the second cylinder mounting hole, the third cylinder mounting hole, the fourth cylinder mounting hole and the fifth cylinder mounting hole have the same structure;

the first micro air cylinder, the second micro air cylinder, the third micro air cylinder, the fourth micro air cylinder and the fifth micro air cylinder have the same structure;

the first cylinder mounting hole comprises a mounting cavity, a first air cavity connected with the mounting cavity and a second air cavity connected with the first air cavity; the inner diameter D1 of the first air cavity is larger than the inner diameter D2 of the second air cavity; the first air passage passes through the first air cavity and the second air cavity;

the first micro cylinder comprises a cylinder body, a cylinder arm connected with the cylinder body and a piston sleeved on the cylinder arm; relative to the cylinder body, the cylinder arm drives the piston to do telescopic motion; the cylinder body is connected with the mounting cavity in a matching way, and the cylinder arm drives the piston to stretch out and draw back, so that the piston can displace between the first air cavity and the second air cavity;

the shape and size of the piston are matched with those of the second air cavity, and when the piston is plugged into the second air cavity, the first air path is disconnected; when the piston is separated from the second air cavity, the first air passage is communicated.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a structure of control gas circuit break-make is realized in miniature cylinder and cylinder mounting hole cooperation, and controlling means control miniature cylinder regulates and control gas flow direction and break-make, does not adopt the solenoid valve structure, prevents effectively that the solenoid valve from generating heat and influencing the sensor precision. The structure more than the disk seat adopts, and the structure integrated level is high, adopts the modularized design, and it is more convenient to install and use.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive effort.

Fig. 1 is a schematic perspective view of a pneumatic control valve for air tightness testing according to a first embodiment of the present invention;

FIG. 2 is a schematic perspective view of the valve seat body of FIG. 1;

FIG. 3 is a schematic view of the back of FIG. 2;

FIG. 4 is a schematic front view of FIG. 2;

FIG. 5 is a schematic top view of FIG. 4;

FIG. 6 isbase:Sub>A schematic sectional view taken along the line A-A in FIG. 5;

FIG. 7 is a schematic cross-sectional view taken along line B-B of FIG. 5;

FIG. 8 is a schematic cross-sectional view taken along line C-C of FIG. 5;

FIG. 9 is a perspective view of the first microcylinder of FIG. 1;

in the figure, 1, a first air path; 11. a first end of a first gas path; 12. a second end of the first gas path;

2. a second gas path; 21. a first end of a second gas path; 22. a second end of the second gas path;

3. a third gas path; 31. a first end of a third gas path; 32. a second end of the third gas path;

4. a fourth gas path; 41. a first end of a fourth gas path; 42. a second end of the fourth gas path;

5. a fifth gas path; 51. a first end of a fifth gas path; 52. a second end of the fifth gas path;

6. a first cylinder mounting hole; 61. a mounting cavity; 62. a first air cavity; 63. a second air cavity;

7. a second cylinder mounting hole; 8. a third cylinder mounting hole; 9. a fourth cylinder mounting hole; 10. a fifth cylinder mounting hole;

101. a valve seat body; 111. a first top surface; 112. a second top surface; 113. a top surface of the valve seat body; 114. a through hole; 115. the right side of the valve seat body; 116. the left surface of the valve seat body;

102. a sensor interface; 103. a test interface;

20. a first microcylinder; 201. a cylinder body; 202. a cylinder arm; 203. a piston;

30. a second microcylinder; 40. a third microcylinder; 50. a fourth microcylinder; 60. a fifth micro cylinder; 70. a gas storage tank; 80. a joint; 90. a valve seat.

Detailed Description

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. 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 one or more of that feature.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "vertical," "horizontal," "left," "right," "up," "down," and the like are used for descriptive purposes only and are not intended to indicate or imply that the referenced device or element must be in a particular orientation, constructed and operated, and therefore should not be construed as limiting the present invention.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Example one

As shown in the first embodiment of fig. 1 to 9, the pneumatic control valve for the air tightness test comprises a valve seat 90, a first micro cylinder 20, a second micro cylinder 30, a third micro cylinder 40, a fourth micro cylinder 50, a fifth micro cylinder 60 and an air storage tank 70.

The valve seat 90 comprises a first gas path 1, a second gas path 2, a third gas path 3, a fourth gas path 4, a fifth gas path 5, a first cylinder mounting hole 6, a second cylinder mounting hole 7, a third cylinder mounting hole 8, a fourth cylinder mounting hole 9, a fifth cylinder mounting hole 10, a valve seat body 101 and a sensor interface 102 embedded in the valve seat body 101. The first air path 1, the second air path 2, the third air path 3, the fourth air path 4 and the fifth air path 5 are arranged in the valve seat body 101. The first cylinder mounting hole 6, the second cylinder mounting hole 7, the third cylinder mounting hole 8, the fourth cylinder mounting hole 9 and the fifth cylinder mounting hole 10 are embedded in the surface of the valve seat body 101. The structure is adopted by the valve seat 90, the structure integration level is high, and the installation and the use are more convenient by adopting a modular design.

The first air path 1 penetrates through the first air cylinder mounting hole 6, and the first micro air cylinder 20 is matched with the first air cylinder mounting hole 6 to control the on-off of the first air path 1. The second air path 2 penetrates through the second air cylinder mounting hole 7, and the second micro air cylinder 30 is matched with the second air cylinder mounting hole 7 to control the second air path 2 to be switched on and off. The third air path 3 passes through the third cylinder mounting hole 8, and the third micro cylinder 40 and the third cylinder mounting hole 8 are matched to control the on-off of the third air path 3. The fourth air passage 4 penetrates through the fourth air cylinder mounting hole 9, and the fourth micro air cylinder 50 is matched with the fourth air cylinder mounting hole 9 to control the on-off of the fourth air passage 4. The fifth air path 5 penetrates through the fifth air cylinder mounting hole 10, and the fifth micro air cylinder 60 is matched with the fifth air cylinder mounting hole 10 to control the on-off of the fifth air path 5.

As a further description of the first embodiment, the valve seat body 101 has a square structure, the front and back of the valve seat body are disposed opposite to each other, the left and right are disposed opposite to each other, and the top and bottom are disposed opposite to each other. The top surface 113 of the valve seat body includes a first top surface 111 and a second top surface 112. The first top surface 111 is higher than the second top surface 112 so that the top surface 113 of the valve seat body forms a step structure, and the step structure is convenient for installing 4 micro cylinders on the top surface.

The first top surface 111 is provided with a first cylinder mounting hole 6 for mounting the first microcylinder 20 and a second cylinder mounting hole 7 for mounting the second microcylinder 30, the first microcylinder 20 being inserted into the first cylinder mounting hole 6, and the second microcylinder 30 being inserted into the second cylinder mounting hole 7. The valve seat body 101 is provided with a through hole 114 for mounting a fixing member, and the through hole 114 penetrates the top and bottom surfaces of the valve seat body 101.

The second top surface 112 is provided with a third cylinder mounting hole 8 for mounting the third microcylinder 40 and a fourth cylinder mounting hole 9 for mounting the fourth microcylinder 50, the third microcylinder 40 being inserted into the third cylinder mounting hole 8, and the fourth microcylinder 50 being inserted into the fourth cylinder mounting hole 9.

The right side 115 of the valve seat body is provided with a fifth cylinder mounting hole 10 for mounting the fifth micro cylinder 60, and the fifth micro cylinder 60 is inserted into the fifth cylinder mounting hole 10.

In the valve seat body, a first air passage 1 penetrates through the first cylinder mounting hole 6, a first end 11 of the first air passage is arranged on the right face 115 of the valve seat body and is connected with the air storage tank 70, a second end 12 of the first air passage is communicated with a sensor interface 102, and the sensor interface 102 is embedded on the left face 116 of the valve seat body. The first micro cylinder 20 is matched with the first cylinder mounting hole 6 to realize the on-off control of the first air path 1.

The second air passage 2 passes through the second cylinder mounting hole 7, and the first end 21 of the second air passage is arranged on the left surface 116 of the valve seat body and connected with the joint 80. The second end 22 of the second air passage communicates with the middle of the first air passage 1. The second end 22 of the second air passage is located between the first cylinder mounting hole 6 and the second end 12 of the first air passage. The second micro cylinder 30 is matched with the second cylinder mounting hole 7 to control the on-off of the second air path 2.

The first end 31 of the third air path is communicated with the test interface 103 on the first top surface 111, the second end 32 of the third air path is communicated with the first air path 1, the third air path 3 passes through the third cylinder mounting hole 8, and the third micro cylinder 40 is matched with the third cylinder mounting hole 8 to control the on-off of the third air path 3.

The first end 41 of the fourth air passage is communicated with the second air passage 2, and the first end 41 of the fourth air passage is positioned between the second cylinder mounting hole 7 and the second end 22 of the second air passage. The second end 42 of the fourth air passage is disposed on the left surface 116 of the valve seat body, and the second end 42 of the fourth air passage is connected to the joint 80. And the fourth air passage 4 penetrates through a fourth air cylinder mounting hole 9, and the on-off of the fourth air passage is controlled by matching the fourth air cylinder micro air cylinder with the fourth air cylinder mounting hole 9.

The first end 51 of the fifth air passage is communicated with the fourth air passage 4, the second end 52 of the fifth air passage is arranged on the left surface 116 of the valve seat body, and the second end 52 of the fifth air passage is connected with the joint 80. The first end 51 of the fifth air passage is located between the fourth cylinder mounting hole 9 and the second end 42 of the fourth air passage. The fifth air path 5 passes through the fifth air cylinder mounting hole 10, and the fifth micro air cylinder 60 is matched with the fifth air cylinder mounting hole 10 to control the on-off of the fifth air path 5.

The first embodiment further comprises a control device (not shown), and the first microcylinder 20, the second microcylinder 30, the third microcylinder 40, the fourth microcylinder 50 and the fifth microcylinder 60 are respectively electrically connected with the control device. In the first embodiment, the structure of more than one air path is adopted, the control device controls the micro air cylinder to regulate and control the flowing direction and the on-off of air, and the electromagnetic valve structure is not adopted, so that the electromagnetic valve is effectively prevented from heating to influence the precision of the sensor.

In the first embodiment, the first cylinder mounting hole 6, the second cylinder mounting hole 7, the third cylinder mounting hole 8, the fourth cylinder mounting hole 9, and the fifth cylinder mounting hole 10 have the same structure. The first microcylinder 20, the second microcylinder 30, the third microcylinder 40, the fourth microcylinder 50 and the fifth microcylinder 60 have the same structure.

The first cylinder mounting hole 6 includes a mounting cavity 61, a first air cavity 62 connecting the mounting cavity 61, and a second air cavity 63 connecting the first air cavity 62. The inner diameter D1 of the first air chamber 62 is larger than the inner diameter D2 of the second air chamber 63. The first air path 1 passes through the first air chamber 62 and the second air chamber 63. The first microcylinder 20 includes a cylinder body 201, a cylinder arm 202 connected to the cylinder body 201, and a piston 203 sleeved on the cylinder arm 202. The cylinder arm 202 drives the piston 203 to perform telescopic motion relative to the cylinder 201. The cylinder body 201 is connected with the mounting cavity 61 in a matching mode, and the cylinder arm 202 drives the piston 203 to stretch and retract, so that the piston can displace between the first air cavity 62 and the second air cavity 63. The shape and size of the piston 203 and the second air cavity 63 are matched, and when the piston 203 is plugged into the second air cavity 63, the first air channel 1 is disconnected; when the piston 203 is separated from the second air chamber 63, the first air passage 1 is communicated. By adopting the structure, the first cylinder mounting hole 6 and the first micro cylinder 20 are matched to realize the on-off control of the first air path 1.

Other structures of the first embodiment are shown in the prior art.

Example two

As a further improvement to the first embodiment, in the pneumatic control valve for the air tightness test of the second embodiment, the control device includes an MCU module. The first micro cylinder 20, the second micro cylinder 30, the third micro cylinder 40, the fourth micro cylinder 50 and the fifth micro cylinder 60 are respectively electrically connected with the MCU module, so that the MCU module can control the flowing direction and the on-off of the gas.

The MCU module comprises a data acquisition module, an edge calculation module connected with the data acquisition module and a transceiver module used for electrically connecting the human-computer interaction interface. The data acquisition module is used for acquiring monitoring data of the sensor in real time and transmitting the acquired monitoring data to the edge calculation module; the edge computing module is used for analyzing and processing the received monitoring data, when the monitoring data are analyzed to be abnormal, the abnormal analysis result is transmitted to the human-computer interaction interface through the 5G network through the transceiving module, and the air tightness test result is obtained through human-computer interaction interface detection personnel.

The transceiver module adopts an SX1278ZTR4-GC wireless module, the SX1278ZTR4-GC wireless module is a radio frequency module based on an SEMTECH radio frequency integrated chip SX127X, and is a high-performance Internet of things wireless transceiver, the special LoRa debugging mode of the transceiver module can greatly increase the communication distance, and the transceiver module can be widely applied to the field of short-distance Internet of things wireless communication of various occasions. The device has the characteristics of small volume, low power consumption, long transmission distance, strong anti-interference capability and the like.

The second embodiment further comprises a watchdog chip connected with the MCU module. During the working process of the MCU module, external interference such as an electromagnetic field can be applied, and the program can run away and get into endless circulation. The watchdog chip is used for monitoring the running state of the singlechip in real time, so that the singlechip can continuously work in an unmanned state. The working process of the watchdog chip is as follows: the MCU module sends signals to the watchdog chip through an I/O pin in a timing manner; if the single chip program is accidentally run away, the watchdog chip cannot send signals to the watchdog chip at regular time, and at the moment, the watchdog chip sends a reset signal to reset the MCU module, so that the program is executed from the beginning. Thus, the automatic reset of the MCU module is realized.

See example one and the prior art for other structures for example two.

It should be noted that, functional units/modules in the embodiments of the present invention may be integrated into one processing unit/module, or each unit/module may exist alone physically, or two or more units/modules are integrated into one unit/module. The integrated units/modules may be implemented in the form of hardware, or may also be implemented in the form of software functional units/modules.

The present invention is not limited to the above embodiment, and various modifications and variations of the present invention are also intended to be included within the scope of the claims and the equivalent technical scope of the present invention if they do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a gas accuse valve for gas tightness test which characterized in that: comprises a valve seat (90) and a micro cylinder; the valve seat comprises an air passage, an air cylinder mounting hole, a valve seat body (101) and a sensor interface (102) embedded in the valve seat body;

2. A pneumatic control valve for air tightness test according to claim 1, characterized in that: the micro air cylinders comprise a first micro air cylinder (20), a second micro air cylinder (30), a third micro air cylinder (40), a fourth micro air cylinder (50) and a fifth micro air cylinder (60);

the gas circuits comprise a first gas circuit (1), a second gas circuit (2), a third gas circuit (3), a fourth gas circuit (4) and a fifth gas circuit (5);

the cylinder mounting holes comprise a first cylinder mounting hole (6), a second cylinder mounting hole (7), a third cylinder mounting hole (8), a fourth cylinder mounting hole (9) and a fifth cylinder mounting hole (10);

the first air path, the second air path, the third air path, the fourth air path and the fifth air path are arranged in the valve seat body (101); the first cylinder mounting hole, the second cylinder mounting hole, the third cylinder mounting hole, the fourth cylinder mounting hole and the fifth cylinder mounting hole are embedded in the surface of the valve seat body;

the first air passage penetrates through the first air cylinder mounting hole, and the first miniature air cylinder is matched with the first air cylinder mounting hole to control the first air passage to be switched on and off; the second air path penetrates through the second air cylinder mounting hole, and the second micro air cylinder is matched with the second air cylinder mounting hole to control the on-off of the second air path; a third air path penetrates through a third air cylinder mounting hole, and the third micro air cylinder and the third air cylinder mounting hole are matched to control the on-off of the third air path; the fourth air passage passes through a fourth air cylinder mounting hole, and the fourth micro air cylinder is matched with the fourth air cylinder mounting hole to control the fourth air passage to be switched on and off; and the fifth air passage passes through the fifth air cylinder mounting hole, and the fifth micro air cylinder and the fifth air cylinder mounting hole are matched to control the on-off of the fifth air passage.

3. A pneumatic control valve for air tightness test according to claim 2, characterized in that: the valve seat body (101) is of a square structure, the top surface (113) of the valve seat body comprises a first top surface (111) and a second top surface (112), the first top surface is higher than the second top surface, and the first top surface and the second top surface are connected to enable the top surface of the valve seat body to form a stepped structure;

the first cylinder mounting hole (6) and the second cylinder mounting hole (7) are formed in the first top surface, the first micro cylinder (20) is inserted into the first cylinder mounting hole, and the second micro cylinder (30) is inserted into the second cylinder mounting hole;

the third cylinder mounting hole (8) and the fourth cylinder mounting hole (9) are formed in a second top surface (112), the third micro cylinder (40) is inserted into the third cylinder mounting hole, and the fourth micro cylinder (50) is inserted into the fourth cylinder mounting hole;

and the right surface (115) of the valve seat body is provided with the fifth cylinder mounting hole (10).

4. A pneumatic control valve for air tightness test according to claim 3, characterized in that: the first end (11) of first gas circuit is located right side (115) of valve seat body, and the first end of first gas circuit connects gas holder (70), and second end (12) of first gas circuit intercommunication sensor interface (102), sensor interface inlay locates left side (116) of valve seat body.

5. A pneumatic control valve for air tightness test according to claim 4, characterized in that: the first end (21) of the second air path is arranged on the left surface (116) of the valve seat body, and the first end of the second air path is connected with the joint (80);

the second end (22) of the second air passage is communicated with the middle part of the first air passage (1); the second end of the second air passage is located between the first cylinder mounting hole (6) and the second end (12) of the first air passage.

6. A pneumatic control valve for air tightness test according to claim 5, characterized in that: the first end (31) of the third air path is communicated with the test interface (103) on the first top surface (111), and the second end (32) of the third air path is communicated with the first air path (1).

7. A pneumatic control valve for air tightness test according to claim 6, characterized in that: a first end (41) of the fourth air path is communicated with the second air path (2), and is positioned between the second cylinder mounting hole (7) and a second end (22) of the second air path;

and a second end (42) of the fourth air path is arranged on the left surface (116) of the valve seat body, and the second end of the fourth air path is connected with the joint.

8. A pneumatic control valve for air tightness test according to claim 7, characterized in that: a first end (51) of the fifth air path is communicated with the fourth air path (4), a second end (52) of the fifth air path is arranged on the left surface (116) of the valve seat body, and the second end (52) of the fifth air path is connected with the joint (80); and the first end of the fifth air path is positioned between the fourth cylinder mounting hole (9) and the second end (42) of the fourth air path.

9. A pneumatic control valve for air tightness test according to any one of claims 2 to 8, characterized in that: the device is characterized by further comprising a control device, wherein the first micro cylinder (20), the second micro cylinder (30), the third micro cylinder (40), the fourth micro cylinder (50) and the fifth micro cylinder (60) are respectively connected with the control device.

10. A pneumatic control valve for air tightness test according to any one of claims 2 to 8, characterized in that: the first cylinder mounting hole (6), the second cylinder mounting hole (7), the third cylinder mounting hole (8), the fourth cylinder mounting hole (9) and the fifth cylinder mounting hole (10) are identical in structure;

the first micro cylinder (20), the second micro cylinder (30), the third micro cylinder (40), the fourth micro cylinder (50) and the fifth micro cylinder (60) have the same structure;

the first air cylinder mounting hole comprises a mounting cavity (61), a first air cavity (62) connected with the mounting cavity and a second air cavity (63) connected with the first air cavity; the inner diameter D1 of the first air cavity is larger than the inner diameter D2 of the second air cavity; the first air passage (1) penetrates through the first air cavity and the second air cavity;

the first micro cylinder comprises a cylinder body (201), a cylinder arm (202) connected with the cylinder body and a piston (203) sleeved on the cylinder arm; relative to the cylinder body, the cylinder arm drives the piston to do telescopic motion; the cylinder body is connected with the mounting cavity in a matching way, and the cylinder arm drives the piston to stretch out and draw back, so that the piston can displace between the first air cavity and the second air cavity;

the shape and size of the piston are matched with those of the second air cavity, and when the piston is plugged into the second air cavity, the first air path (1) is disconnected; when the piston is separated from the second air cavity, the first air passage is communicated.