Vacuumizing sealing performance testing device for porous cover

Abstract

The utility model discloses a porous cover vacuum-pumping sealing performance testing device, which belongs to the technical field of air tightness detection, and comprises a frame, a porous cover one-way valve, an air exhaust detection device and an assembling device, the frame is provided with the air exhaust detection device used for vacuum-pumping detection of air tightness and the assembling device used for assembling connection, the porous cover one-way valve is located between the air exhaust detection device and the assembling device and connected with the air exhaust detection device and the assembling device. The air exhaust detection device comprises a pressing assembly used for providing driving force and an air exhaust detection assembly used for conducting vacuumizing and air tightness detection on the porous cover one-way valve. Through the above mode, the downward pressing assembly drives the air exhaust detection assembly to move so as to detect the airtightness of the porous cover one-way valve, the operation is simple, the detection is rapid, through the arrangement of the assembly device, the assembly of parts can be completed while the airtightness is detected, the production time is saved, and the processing efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection, in particular to a vacuum sealing test device for a porous cover. Background Art

[0002] During the production process of some sealing parts, in order to ensure the safety and reliability of the products and avoid economic losses or safety hazards caused by leakage, the products are usually tested for air tightness. Currently, the commonly used air tightness testing methods include air pressure method, water immersion method and ultrasonic testing.

[0003] For example, Chinese patent application CN113465834A discloses a valve air tightness detection device, which includes a fuselage and a water reservoir formed on the fuselage. A lifting platform is provided above the water reservoir, and driving parts are symmetrically arranged on the lifting platform. Each of the driving parts is connected to a sealing part, and one of the sealing parts is connected to an air intake pipe. A detection platform is provided on the lifting platform at a position between two sealing parts, which is rotated by a rotating shaft. A detection station for placing the valve and corresponding to the sealing part is formed on the detection platform, and the axis of the rotating shaft is parallel to the symmetry line of the two sealing parts.

[0004] However, the valve air tightness detection equipment has a complex structure, a long detection time, and is complicated to operate when replacing new products. In addition, some products that need to be assembled and tightened cannot be processed synchronously, resulting in low efficiency.

[0005] Based on this, the utility model designs a vacuum sealing test device for a porous cover to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a device for testing the vacuum sealing performance of a porous cover.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A porous cover vacuum sealing test device, comprising a frame, a porous cover one-way valve, a vacuum detection device and an assembly device;

[0009] The frame is equipped with a vacuum detection device for vacuuming and detecting air tightness, and an assembly device for assembly connection, and the porous cover one-way valve is located between the vacuum detection device and the assembly device and is connected to the vacuum detection device and the assembly device;

[0010] The air extraction detection device includes a downward pressure component for providing driving force and an air extraction detection component for vacuuming and air tightness detection of the porous cover one-way valve. The air extraction detection component is installed at the lower end of the downward pressure component, the downward pressure component is connected to the frame, and the air extraction detection component is connected to the porous cover one-way valve.

[0011] Furthermore, the porous cover one-way valve includes a valve body, a vent pipe and a sealing ring. The sealing ring is located on the inner side of the valve body and is in sealing contact with the sealing ring. A connecting pipe for use with the vent pipe is provided at the lower end of the valve body. The vent pipe is plugged into the connecting pipe of the valve body. The valve body is connected to the air extraction detection component and the assembly device, and the vent pipe is connected to the assembly device.

[0012] Furthermore, the frame includes a base and a mounting frame, the mounting frame is fixedly mounted on the upper end of the base, the base is connected to the assembly device, and the mounting frame is connected to the pressing component.

[0013] Furthermore, the downward pressure assembly includes a first cylinder, two sliding rods, a downward pressure plate and a protective plate. The first cylinder is fixedly mounted on the upper end face of the mounting frame. The output end of the first cylinder passes through the mounting frame and is fixedly connected to the downward pressure plate. The left and right sides of the upper end of the downward pressure plate are respectively fixedly connected to the two sliding rods. The upper end of the sliding rod passes through the mounting frame and is slidably connected to the mounting frame. The front end of the downward pressure plate is fixedly connected to the protective plate. The inner side walls of the left and right ends of the protective plate are slidably connected to the mounting frame. The lower end of the downward pressure plate is connected to the air extraction detection assembly.

[0014] Furthermore, the air extraction detection assembly includes a sealing shell, an air extraction pipe and an air pressure detection component. The sealing shell is fixedly installed at the lower end of the lower pressure plate. The inner side of the lower end of the sealing shell is provided with an annular protrusion for use with the valve body. The outer side of the upper end of the valve body is provided with a sealing ring. The sealing shell and the valve body are connected through the sealing ring. The air extraction pipe is connected and fixedly installed at the rear end of the sealing shell. The air pressure detection component is located at the top inner side of the sealing shell. The air pressure detection component is fixedly connected to the sealing shell and the lower pressure plate. The rear end of the air extraction pipe is connected to the air extraction equipment. The air pressure detection component is the main body of the sensing part of the air tightness detector, and the air tightness detector is the existing technology.

[0015] Furthermore, the assembly device includes a placement and lifting component and an auxiliary assembly component. The placement and lifting component is connected to the base, the valve body and the vent pipe. The auxiliary assembly component is installed at the rear end of the placement and lifting component, and the auxiliary assembly component is connected to the valve body.

[0016] Furthermore, the placement and lifting assembly includes a placement seat, a cylinder mounting plate, a second cylinder and a lifting rod. The upper end of the placement seat is provided with a placement groove for accommodating the valve body, and the inner side of the placement groove is provided with a through hole for accommodating the ventilation pipe. The placement seat is fixedly mounted on the upper end of the base, the cylinder mounting plate is fixedly mounted on the top inside the base, the second cylinder is fixedly mounted on the lower end of the cylinder mounting plate, the output end of the second cylinder is fixedly connected to the lifting rod through the cylinder mounting plate, the upper end of the lifting rod extends through the base to the inner groove of the placement groove, the lifting rod is slidably connected to the placement seat and the base, the upper end of the lifting rod is in contact with the ventilation pipe, and the placement seat is connected to the auxiliary assembly assembly.

[0017] Furthermore, the auxiliary assembly component includes a third cylinder, a push rod, a pressure block and a buffer block. The third cylinder is fixedly installed at the rear end of the placement seat. The rear end of the placement seat is provided with a through groove that accommodates the push rod, the pressure block and the buffer block. The through groove at the rear end of the placement seat is connected to the through groove inside the placement groove. The output end of the third cylinder is fixedly connected to the push rod, the push rod is located in the through groove at the rear end of the placement seat and is slidably connected to the placement seat. The front end of the push rod is fixedly connected to the pressure block, the pressure block is slidably connected to the placement seat, the front end of the pressure block is in contact with the connecting pipe of the valve body, the buffer block is fixedly installed in the through groove at the rear end of the placement seat, the buffer block is located at the front end of the connecting pipe of the valve body, the buffer block is in contact with the connecting pipe of the valve body, and the end of the pressure block and the buffer block close to the valve body is arranged to cooperate with the connecting pipe of the valve body as an arc surface.

[0018] Compared with the prior art, the utility model has the following beneficial effects: 1. The air tightness test of the porous cover one-way valve is carried out by driving the air extraction detection component to move by the pressing component, which is simple to operate and quick to detect. By setting the assembly device, the assembly of the components can be completed at the same time as the air tightness test, which saves production time and has high processing efficiency;

[0019] 2. The first cylinder drives the sealing shell downward to connect with the valve body, so that the sealing shell and the valve body are sealed, and the air tightness of the sealing ring can be accurately tested. At the same time, when the first cylinder drives the valve body to rise, the valve body will rise synchronously and separate from the assembly device, which is convenient for removing the material and improving the processing efficiency. The multi-angle extrusion of the second and third cylinders ensures that the valve body and the vent pipe are tightly assembled to avoid loosening and falling problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0021] Figure 1 This is a three-dimensional diagram of a vacuum sealing test device for a porous cover according to the present invention;

[0022] Figure 2 This is a front view of a device for testing the vacuum tightness of a porous cover according to the present invention;

[0023] Figure 3 This is a left side view of a porous cover vacuum sealing test device of the present invention;

[0024] Figure 4 It is a three-dimensional diagram of the porous cover one-way valve of the utility model;

[0025] Figure 5 To follow Figure 3 AA cuts away part of the solid Figure 1 ;

[0026] Figure 6 To follow Figure 3 AA cuts away part of the solid Figure 2 ;

[0027] Figure 7 for Figure 6 Enlarged view of point B in the middle;

[0028] Figure 8 A three-dimensional diagram of the placement seat of the present invention;

[0029] Figure 9 To follow Figure 2 A three-dimensional image of a section of CC;

[0030] Figure 10 for Figure 9 Enlarged view of point D in the middle.

[0031] The numbers in the figure represent:

[0032] 1. Frame; 11. Base; 12. Mounting frame; 2. Porous cover one-way valve; 21. Valve body; 22. Vent pipe; 23. Sealing ring; 3. Air extraction detection device; 31. Down-pressure assembly; 311. First cylinder; 312. Slide rod; 313. Down-pressure plate; 314. Protective plate; 32. Air extraction detection assembly; 321. Sealing shell; 322. Air extraction pipe; 323. Air pressure detection component; 4. Assembly device; 41. Placement and lifting assembly; 411. Placement seat; 412. Placement slot; 413. Cylinder mounting plate; 414. Second cylinder; 415. Lifting rod; 42. Auxiliary assembly assembly; 421. Third cylinder; 422. Push rod; 423. Pressure block; 424. Buffer block. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0034] The terms “left,” “right,” “front,” “back,” “up,” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0035] Example 1: In some embodiments, please refer to the accompanying drawings of the specification. Figures 1-10 , a porous cover vacuum sealing test device, comprising a frame 1, a porous cover one-way valve 2, a vacuum detection device 3 and an assembly device 4;

[0036] The frame 1 is provided with a vacuum detection device 3 for vacuuming and detecting air tightness, and an assembly device 4 for assembly connection. The porous cover one-way valve 2 is located between the vacuum detection device 3 and the assembly device 4 and is connected to the vacuum detection device 3 and the assembly device 4.

[0037] The air extraction detection device 3 includes a downward pressure component 31 for providing driving force and an air extraction detection component 32 for vacuuming and air tightness detection of the porous cover one-way valve 2. The air extraction detection component 32 is installed at the lower end of the downward pressure component 31, the downward pressure component 31 is connected to the frame 1, and the air extraction detection component 32 is connected to the porous cover one-way valve 2.

[0038] When the porous cover vacuum sealing test device is used normally, the air extraction detection component 32 is started to vacuum the inner part of the assembly device 4 and detect the air tightness, and the assembly device 4 is started to assemble and tighten the multiple components of the porous cover one-way valve 2. After the detection and assembly are completed, the downward pressure component 31 is started to drive the air extraction detection component 32 to rise, and the air extraction detection component 32 drives the porous cover one-way valve 2 to rise synchronously, and the porous cover one-way valve 2 is taken out of the air extraction detection component 32, and the porous cover one-way valve 2 to be processed is placed in the assembly device 4 and the above steps are repeated for continuous detection and assembly. The air tightness detection component 32 is driven by the downward pressure component 31 to move the porous cover one-way valve 2, which is simple to operate, fast to detect, and high in processing efficiency.

[0039] The porous cover one-way valve 2 includes a valve body 21, a vent pipe 22 and a sealing ring 23. The sealing ring 23 is located on the inner side of the valve body 21 and is in sealing contact with the sealing ring 23. The lower end of the valve body 21 is provided with a connecting pipe used to cooperate with the vent pipe 22. The vent pipe 22 is plugged into the connecting pipe of the valve body 21. The valve body 21 is connected to the air extraction detection component 32 and the assembly device 4, and the vent pipe 22 is connected to the assembly device 4.

[0040] The frame 1 includes a base 11 and a mounting frame 12 . The mounting frame 12 is fixedly mounted on the upper end of the base 11 . The base 11 is connected to the assembly device 4 , and the mounting frame 12 is connected to the pressing assembly 31 .

[0041] The downward pressure assembly 31 includes a first cylinder 311, two sliding rods 312, a downward pressure plate 313 and a protective plate 314. The first cylinder 311 is fixedly mounted on the upper end surface of the mounting frame 12. The output end of the first cylinder 311 passes through the mounting frame 12 and is fixedly connected to the downward pressure plate 313. The left and right sides of the upper end of the downward pressure plate 313 are respectively fixedly connected to the two sliding rods 312. The upper end of the sliding rod 312 passes through the mounting frame 12 and is slidably connected to the mounting frame 12. The front end of the downward pressure plate 313 is fixedly connected to the protective plate 314. The inner side walls of the left and right ends of the protective plate 314 are slidably connected to the mounting frame 12. The lower end of the downward pressure plate 313 is connected to the air extraction detection assembly 32.

[0042] The air extraction detection assembly 32 includes a sealing shell 321, an air extraction pipe 322 and an air pressure detection component 323. The sealing shell 321 is fixedly installed at the lower end of the lower pressure plate 313. The inner side of the lower end of the sealing shell 321 is provided with an annular protrusion used to cooperate with the valve body 21. The outer side of the upper end of the valve body 21 is provided with a sealing ring. The sealing shell 321 and the valve body 21 are sealed and connected through the sealing ring. The air extraction pipe 322 is connected and fixedly installed at the rear end of the sealing shell 321. The air pressure detection component 323 is located at the top inner side of the sealing shell 321. The air pressure detection component 323 is fixedly connected to the sealing shell 321 and the lower pressure plate 313. The rear end of the air extraction pipe 322 is connected to the air extraction equipment. The air pressure detection component 323 is the main body of the sensing part of the air tightness detector, and the air tightness detector is the existing technology.

[0043] When the porous cover vacuum sealing test device is used normally, the air extraction device is started, and the air extraction device extracts the inside of the sealing shell 321 into a vacuum through the air extraction pipe 322, and the air pressure detection component 323 is started to detect the air pressure inside the sealing shell 321 to complete the air tightness detection of the sealing ring 23. At the same time, the assembly device 4 assembles and tightens the valve body 21 and the vent pipe 22. After the detection and assembly are completed, the first cylinder 311 is started, and the first cylinder 311 drives the lower pressure plate 313 to rise, and the lower pressure plate 313 drives the sliding rod 312 to slide along the mounting bracket 12 to limit, and the lower pressure plate 313 drives the sealing shell 321 to rise, and the sealing shell 321 is in contact with the valve body 21, thereby driving the valve body 21 The valve body 21 moves synchronously, driving the vent pipe 22 to rise, and the assembly of the valve body 21 and the vent pipe 22 is taken out from the lower end of the sealing shell 321. The new vent pipe 22 is inserted into the connecting pipe at the lower end of the new valve body 21 and placed correspondingly on the inner side of the assembly device 4. The above steps are repeated to complete the continuous detection assembly. The sealing shell 321 is driven downward by the first cylinder 311 to contact and connect with the valve body 21, so that the sealing shell 321 and the valve body 21 are kept sealed, and the air tightness of the sealing ring 23 can be accurately detected. At the same time, when the first cylinder 311 drives the valve body 21 to rise, the valve body 21 will rise synchronously and separate from the assembly device 4, which is convenient for removing and blanking, thereby improving processing efficiency.

[0044] The assembly device 4 includes a placing and lifting component 41 and an auxiliary assembly component 42. The placing and lifting component 41 is connected to the base 11, the valve body 21 and the vent pipe 22. The auxiliary assembly component 42 is installed at the rear end of the placing and lifting component 41. The auxiliary assembly component 42 is connected to the valve body 21.

[0045] The placement and lifting assembly 41 includes a placement seat 411, a cylinder mounting plate 413, a second cylinder 414 and a lifting rod 415. The upper end of the placement seat 411 is provided with a placement groove 412 for accommodating the valve body 21, and the inner side of the placement groove 412 is provided with a through hole for accommodating the ventilation pipe 22. The placement seat 411 is fixedly mounted on the upper end of the base 11, the cylinder mounting plate 413 is fixedly mounted on the top inside the base 11, and the second cylinder 414 is fixedly mounted on the lower end of the cylinder mounting plate 413. The output end of the second cylinder 414 is fixedly connected to the lifting rod 415 through the cylinder mounting plate 413, and the upper end of the lifting rod 415 extends through the base 11 to the inner groove of the placement groove 412. The lifting rod 415 is slidably connected to the placement seat 411 and the base 11. The upper end of the lifting rod 415 is in contact with the ventilation pipe 22, and the placement seat 411 is connected to the auxiliary assembly assembly 42.

[0046] The auxiliary assembly component 42 includes a third cylinder 421, a push rod 422, a pressure block 423 and a buffer block 424. The third cylinder 421 is fixedly installed at the rear end of the placement seat 411. The rear end of the placement seat 411 is provided with a through groove that accommodates the push rod 422, the pressure block 423 and the buffer block 424. The through groove at the rear end of the placement seat 411 is connected to the through groove inside the placement groove 412. The output end of the third cylinder 421 is fixedly connected to the push rod 422. The push rod 422 is located at the rear end of the placement seat 411 and the sliding groove of the placement seat 411. Dynamic connection, the front end of the push rod 422 is fixedly connected to the pressure block 423, the pressure block 423 is slidably connected to the placement seat 411, the front end of the pressure block 423 is in contact with the connecting pipe of the valve body 21, and the buffer block 424 is fixedly installed in the rear end groove of the placement seat 411. The buffer block 424 is located at the front end of the connecting pipe of the valve body 21, and the buffer block 424 is in contact with the connecting pipe of the valve body 21. The end of the pressure block 423 and the buffer block 424 close to the valve body 21 is matched with the connecting pipe of the valve body 21 as an arc surface setting.

[0047] When the porous cover vacuum sealing test device is used normally, the second cylinder 414 is started, and the second cylinder 414 drives the lifting rod 415 to rise along the inner through hole of the placement groove 412, and the lifting rod 415 pushes the vent pipe 22 to rise and connect with the connecting pipe of the valve body 21, and then the third cylinder 421 is started, and the third cylinder 421 drives the push rod 422 to move forward, and the push rod 422 drives the pressure block 423 to cooperate with the buffer block 424 to squeeze the connecting pipe of the valve body 21. The connecting pipe of the valve body 21 and the vent pipe 22 are squeezed and tightly connected to complete the assembly. Through the multi-angle squeezing of the second cylinder 414 and the third cylinder 421, it is ensured that the valve body 21 and the vent pipe 22 are tightly assembled to avoid the problem of loosening and falling.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A porous cover vacuum sealing test device, comprising a frame (1), characterized in that: It also includes a porous cover one-way valve (2), an air extraction detection device (3) and an assembly device (4); the frame (1) is equipped with an air extraction detection device (3) for vacuuming and detecting air tightness, and an assembly device (4) for assembly connection; the porous cover one-way valve (2) is located between the air extraction detection device (3) and the assembly device (4) and is connected to the air extraction detection device (3) and the assembly device (4); The air extraction detection device (3) comprises a pressing assembly (31) for providing a driving force and an air extraction detection assembly (32) for performing vacuum extraction and air tightness detection on the porous cover one-way valve (2). The air extraction detection assembly (32) is mounted on the lower end of the pressing assembly (31), the pressing assembly (31) is connected to the frame (1), and the air extraction detection assembly (32) is connected to the porous cover one-way valve (2).

2. The porous cover vacuum sealing test device according to claim 1, characterized in that: The porous cover one-way valve (2) comprises a valve body (21), a vent pipe (22) and a sealing ring (23). The sealing ring (23) is located on the inner side of the valve body (21) and is in sealing contact with the sealing ring (23). A connecting pipe for use with the vent pipe (22) is provided at the lower end of the valve body (21). The vent pipe (22) is plugged into the connecting pipe of the valve body (21). The valve body (21) is connected to the air extraction detection component (32) and the assembly device (4), and the vent pipe (22) is connected to the assembly device (4).

3. The porous cover vacuum sealing test device according to claim 2, characterized in that: The frame (1) comprises a base (11) and a mounting frame (12), wherein the mounting frame (12) is fixedly mounted on the upper end of the base (11), the base (11) is connected to the assembly device (4), and the mounting frame (12) is connected to the pressing assembly (31).

4. The porous cover vacuum sealing test device according to claim 3, characterized in that: The pressing assembly (31) includes a first cylinder (311), two slide bars (312), a pressing plate (313) and a protective plate (314). The first cylinder (311) is fixedly mounted on the upper end surface of the mounting frame (12). The output end of the first cylinder (311) passes through the mounting frame (12) and is fixedly connected to the pressing plate (313). The left and right sides of the upper end of the pressing plate (313) are respectively fixedly connected to the two slide bars (312). The upper end of the slide bar (312) passes through the mounting frame (12) and is slidably connected to the mounting frame (12). The front end of the pressing plate (313) is fixedly connected to the protective plate (314). The inner side walls of the left and right ends of the protective plate (314) are slidably connected to the mounting frame (12). The lower end of the pressing plate (313) is connected to the air extraction detection assembly (32).

5. The porous cover vacuum sealing test device according to claim 4, characterized in that: The air extraction detection assembly (32) includes a sealing shell (321), an air extraction pipe (322) and an air pressure detection component (323). The sealing shell (321) is fixedly mounted on the lower end of the lower pressure plate (313). An annular protrusion is provided on the inner side of the lower end of the sealing shell (321) for use with the valve body (21). A sealing ring is provided on the outer side of the upper end of the valve body (21). The sealing shell (321) and the valve body (21) are connected to each other through the sealing ring. The air extraction pipe (322) is connected and fixedly mounted on the rear end of the sealing shell (321). The air pressure detection component (323) is located at the top inner side of the sealing shell (321). The air pressure detection component (323) is fixedly connected to the sealing shell (321) and the lower pressure plate (313). The rear end of the air extraction pipe (322) is connected to the air extraction device.

6. The porous cover vacuum sealing test device according to any one of claims 2 to 5, characterized in that: The assembly device (4) comprises a placement and lifting assembly (41) and an auxiliary assembly assembly (42), wherein the placement and lifting assembly (41) is connected to the base (11), the valve body (21) and the vent pipe (22), and the auxiliary assembly assembly (42) is installed at the rear end of the placement and lifting assembly (41), and the auxiliary assembly assembly (42) is connected to the valve body (21).

7. The porous cover vacuum sealing test device according to claim 6, characterized in that: The placing and lifting assembly (41) includes a placing seat (411), a cylinder mounting plate (413), a second cylinder (414) and a lifting rod (415). The upper end of the placing seat (411) is provided with a placing groove (412) for accommodating the valve body (21). The inner side of the placing groove (412) is provided with a through hole for accommodating the vent pipe (22). The placing seat (411) is fixedly mounted on the upper end of the base (11), the cylinder mounting plate (413) is fixedly mounted on the inner top of the base (11), and the second cylinder (414) is fixedly mounted on the inner top of the base (11). 14) is fixedly mounted on the lower end of the cylinder mounting plate (413), the output end of the second cylinder (414) passes through the cylinder mounting plate (413) and is fixedly connected to the lifting rod (415), the upper end of the lifting rod (415) passes through the base (11) and extends to the inner groove of the placement groove (412), the lifting rod (415) is slidably connected to the placement seat (411) and the base (11), the upper end of the lifting rod (415) is in contact with the ventilation pipe (22), and the placement seat (411) is connected to the auxiliary assembly component (42).

8. The porous cover vacuum sealing test device according to claim 7, characterized in that: The auxiliary assembly component (42) includes a third cylinder (421), a push rod (422), a pressure block (423) and a buffer block (424). The third cylinder (421) is fixedly mounted on the rear end of the placement seat (411). The rear end of the placement seat (411) is provided with a through groove for accommodating the push rod (422), the pressure block (423) and the buffer block (424). The through groove at the rear end of the placement seat (411) is connected to the through groove inside the placement groove (412). The output end of the third cylinder (421) is fixedly connected to the push rod (422). The push rod (422) is located at the rear end of the placement seat (411) and the placement seat (411). ) is slidably connected, the front end of the push rod (422) is fixedly connected to the pressure block (423), the pressure block (423) is slidably connected to the placement seat (411), the front end of the pressure block (423) is in contact with the connecting pipe of the valve body (21), the buffer block (424) is fixedly installed in the rear end groove of the placement seat (411), the buffer block (424) is located at the front end of the connecting pipe of the valve body (21), the buffer block (424) is in contact with the connecting pipe of the valve body (21), and the end of the pressure block (423) and the buffer block (424) close to the valve body (21) is matched with the connecting pipe of the valve body (21) to form an arc surface.

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