Air-tightness testing device for valve plate of air compressor

Abstract

The utility model discloses an air compressor valve plate air tightness testing arrangement, including lower pressure subassembly and jig, the jig includes lower jig and upper jig, and the upper jig is fixed on the output of lower pressure cylinder, and the lower jig is fixed on the work platform, the opposite surface of lower jig and upper jig is provided with the leakage passage, and the first sealing ring is arranged around the periphery of leakage passage, the leakage passage is continuously provided with gas pressure sensor, and the upper jig is located the air passage of the position of leakage passage's just above, and the air passage's all around is provided with the second sealing ring, and the piston rod hollow of lower pressure cylinder of lower pressure subassembly forms the air inlet channel, and the air inlet channel is communicated with air passage, the air inlet valve of waiting for testing can be pressed tightly on the lower jig by the upper jig, makes the air passage of waiting for testing air inlet valve to be located the upper of leakage passage and the periphery of air passage and first sealing ring fit, the valve plate of air inlet valve is to air passage, and the second sealing ring and valve body of valve plate periphery fit contact.

Description

Technical Field

[0001] This utility model belongs to the field of testing device technology, specifically relating to an air compressor air tightness testing device. Background Technology

[0002] Air compressor valve plates play a crucial role in air compressor systems, and their unique designs and functions vary depending on their location. The main functions of air compressor valve plates are as follows: Controlling airflow: Inlet valve: Closed during compressor startup to reduce start-up load. During normal operation, it adjusts its opening degree according to pressure changes to control airflow. Exhaust valve: Used to discharge compressed air. When the air inside the compressor is compressed to the set pressure, the exhaust valve opens, releasing the compressed air into the air tank or piping network. Figure 1 and Figure 2 The diagram illustrates the structure of an intake valve 10, which includes a valve body 11, two symmetrically arranged valve plates 12, and a positioning element 14. The valve body 11 has a gas passage 111 and a positioning hole 112. Each valve plate 12 includes a valve disc portion 121 and a connecting portion 122, and the valve plate 12 is mounted on one end face of the valve body 11. Specifically, the connecting portion 122 is fixedly connected to the valve body 11 by bolts 13. After connection, the valve disc portion 121 uses its own elasticity to seal one end of the gas passage 111. When the air compressor draws in air, atmospheric pressure pushes the valve disc portion 121 to undergo elastic deformation, moving it a certain distance away from the end face of the gas passage 111. At this time, the gas passage 111 communicates with the inside of the compressor, enabling air intake. After the intake is complete, the valve disc portion 121 continues to seal the gas passage under its own elastic force, thus forming a... An intake valve structure that only allows gas to enter in one direction will leak if the valve plate 121 fails to seal the gas passage properly during use, which will adversely affect the operation of the compressor and may even prevent it from operating normally. Therefore, the airtightness of the valve plate is crucial to the normal operation of the air compressor. Poor airtightness of either the intake or exhaust valve will lead to air compressor failure. Therefore, it is necessary to test the airtightness of the air compressor valve plate after its production is completed, as well as during inspection, maintenance and routine upkeep. Summary of the Invention

[0003] The purpose of this invention is to provide an air compressor air tightness testing device, which aims to solve the technical problems existing in the background art.

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows:

[0005] An air compressor valve plate air tightness testing device includes a lower pressure assembly and a fixture. The lower pressure assembly includes a lower pressure cylinder, a working platform, and an upper support plate. The lower pressure assembly is fixedly installed on the upper support plate, and the working platform is located directly below the upper support plate. The output end of the lower pressure assembly extends through the upper support plate towards the working platform. The fixture includes a lower fixture and an upper fixture. The upper fixture is fixed to the output end of the lower pressure cylinder, and the lower fixture is fixed to the working platform. A leakage channel and a first sealing ring are provided on the opposite surfaces of the lower fixture and the upper fixture, surrounding the leakage channel. The leakage channel is connected to a gas pressure sensor; an air channel is provided on the upper fixture directly above the leakage channel, and a continuous second sealing ring is arranged around the air channel; the piston rod of the lower cylinder is hollow to form an air intake channel, and the air intake channel is connected to the air channel; the air intake valve to be tested can be pressed by the upper fixture onto the lower fixture, so that the gas channel of the air intake valve to be tested is located above the leakage channel and the outer periphery of the gas channel is in contact with the first sealing ring; the valve plate of the air intake valve faces the air channel, and the second sealing ring is in contact with the valve body around the valve plate.

[0006] Based on the above scheme and as a preferred embodiment of the above scheme: the lower fixture is provided with positioning pins that correspond one-to-one with the positioning holes on the intake valve.

[0007] Based on the above solution and as a preferred embodiment of the above solution: the lower fixture further includes a positioning recess corresponding to the positioning element on the intake valve, which is located on one side of the first sealing ring and has a clearance fit with the positioning element.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: an air inlet is provided at the end of the piston rod away from the upper fixture, and the air inlet is connected to an external pipeline, through which clean air under positive pressure is introduced into the air inlet channel.

[0009] The significant and beneficial technical effects of this invention compared to existing technologies are as follows: The intake valve to be tested is placed on the lower fixture, with its positioning hole embedded in the positioning post within the lower fixture. The upper fixture is then pressed against the lower fixture by the lower pressing component. At this time, the lower end of the gas passage of the intake valve is connected to the leakage passage and sealed by the first sealing ring to prevent the leakage pressure from spreading outwards and affecting the test results. The second sealing ring of the upper fixture seals the valve plate around its perimeter, with the valve plate fully facing the air passage. When positive pressure clean air meeting the testing requirements is introduced into the external pipeline of the intake port, the working environment of the valve plate during the air compression process is simulated. If the sealing effect of the valve plate is poor, air will leak from the sealing surface between the valve plate and the gas passage to the lower end of the gas passage, i.e., the leakage passage. Furthermore, a gas pressure sensor is installed to detect the pressure formed by the leaking air in the leakage passage, thereby obtaining the leakage status of the valve plate. Once leakage occurs or exceeds the set range, the intake valve is considered to be non-compliant. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of the intake valve;

[0011] Figure 2 This is a schematic diagram of the overall structure of the intake valve from the reverse side;

[0012] Figure 3 This is a three-dimensional view of the overall structure of this utility model;

[0013] Figure 4 This is a perspective view of the overall structure of this utility model from another angle;

[0014] Figure 5 This is a front view of the overall structure of this utility model;

[0015] Figure 6 This is the utility model Figure 5 Sectional view of AA;

[0016] Figure 7 This is the utility model Figure 5 BB section view. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the given embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] In the description of this application, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0019] See details Figure 3-7 As shown, an air compressor valve plate air tightness testing device includes a pressure-down assembly 20 and a fixture. The pressure-down assembly 20 includes a pressure-down cylinder 21, a working platform 221, and an upper support plate 222. The pressure-down assembly 20 is fixedly installed on the upper support plate 222. The working platform 221 is located directly below the upper support plate 222. The output end of the pressure-down assembly 20 extends through the upper support plate 222 towards the working platform 221. The piston rod 211 of the pressure-down cylinder 21 is hollow to form an air intake channel 2112. An air intake interface 2111 is provided at the end of the piston rod 211 away from the upper fixture 40. The air intake interface 2111 is connected to an external pipeline, through which clean air under positive pressure is introduced into the air intake channel 2112.

[0020] The fixture includes a lower fixture 30 and an upper fixture 40. The lower fixture 30 is fixed on the working platform 221. A leakage channel 31 and a first sealing ring 32 surrounding the leakage channel 31 are provided on the opposite surfaces of the lower fixture 30 and the upper fixture 40. The leakage channel 31 is connected to a gas pressure sensor 50. Specifically, in this embodiment, the gas pressure sensor 50 preferably has a plastic or metal outer shell, which is fixedly installed at the lower end of the leakage channel of the lower fixture 30, sealing the lower end of the leakage channel and ensuring that its detection end is fully exposed within the leakage channel 31. Furthermore, to facilitate rapid positioning of the intake valve 10 and improve its positioning accuracy and convenience, this embodiment preferably provides positioning pins 34 on the lower fixture 30 that correspond one-to-one with the positioning holes 112 on the intake valve 10. Of course, the lower fixture 30 also includes positioning recesses 33 that correspond one-to-one with the positioning members 14 on the intake valve 10, located on one side of the first sealing ring 32 and clearance-fitted with the positioning members 14. This achieves precise positioning of the intake valve 10, preventing the intake valve 10 from becoming misaligned when the upper fixture 40 presses it against the lower fixture 30, thus avoiding test failure. The upper fixture 40 is fixed to the lower end of the piston rod 211 of the lower pressure cylinder 21. An air channel 42 is provided on the upper fixture 40, directly above the leakage channel 31. A continuous second sealing ring 43 is arranged around the air channel 42, and the intake channel 2112 is connected to the air channel 42. The intake valve 10 to be tested can be pressed against the lower fixture 30 by the upper fixture 40, so that the gas channel 111 of the intake valve 10 to be tested is located above the leakage channel 31 and the outer periphery of the gas channel 111 is in contact with the first sealing ring 32. The valve plate 12 of the intake valve 10 faces the air channel 42, and the second sealing ring 43 is in contact with the valve body 11 around the valve plate 12.

[0021] During testing, the intake valve 10 to be tested is placed on the lower fixture 30, with its positioning hole 112 embedded in the positioning post 34 inside the lower fixture. The upper fixture 40 is driven by the lower pressing component to press the intake valve 10 tightly onto the lower fixture 30. At this time, the lower end of the gas passage of the intake valve 10 is connected to the leakage passage 31 and sealed by the first sealing ring 32 to prevent the leakage pressure of the test from spreading outward and affecting the test results. The second sealing ring 43 of the upper fixture seals the valve plate 12 around its perimeter, with the valve plate 12 facing the air passage completely. When positive pressure clean air that meets the test requirements is introduced into the external pipeline of the intake port, the working environment of the valve plate during the air compression process of the compressor is simulated. If the sealing effect of the valve plate is not good, air will leak from the sealing surface between the valve plate and the gas passage to the lower end of the gas passage, i.e., the leakage passage. A gas pressure sensor is further set to detect the pressure formed by the leaking air in the leakage passage, thereby obtaining the leakage status of the valve plate. Once leakage occurs or the leakage exceeds the set range, the intake valve is considered to be non-compliant.

[0022] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A device for testing the air tightness of an air compressor valve plate, characterized in that: The device includes a pressing assembly (20) and a fixture. The pressing assembly (20) includes a pressing cylinder (21), a working platform (221), and an upper support plate (222). The pressing assembly (20) is fixedly installed on the upper support plate (222). The working platform (221) is located directly below the upper support plate (222). The output end of the pressing assembly (20) extends through the upper support plate (222) towards the working platform (221). The fixture includes a lower fixture (30) and an upper fixture (40). The upper fixture (40) is fixed on the output end of the pressing cylinder (21), and the lower fixture (30) is fixed on the working platform (221). A leakage channel (31) and a first sealing ring (32) are provided on the opposite surfaces of the lower fixture (30) and the upper fixture (40). The leakage channel (31) is connected to a... Gas pressure sensor (50); an air channel (42) is provided on the upper fixture (40) directly above the leakage channel (31), and a continuous second sealing ring (43) is arranged around the air channel (42). The piston rod (211) of the lower pressure cylinder (21) is hollow to form an air intake channel (2112), and the air intake channel (2112) is connected to the air channel (42); the air intake valve (10) to be tested can be pressed by the upper fixture (40) onto the lower fixture (30), so that the gas channel (111) of the air intake valve (10) to be tested is located above the leakage channel (31) and the outer periphery of the gas channel (111) is in contact with the first sealing ring (32); the valve plate (12) of the air intake valve (10) faces the air channel (42), and the second sealing ring (43) is in contact with the valve body (11) around the valve plate (12).

2. The air compressor valve plate air tightness testing device according to claim 1, characterized in that: The lower fixture (30) is provided with positioning pins (34) that correspond one-to-one with the positioning holes (112) on the air intake valve (10).

3. The air compressor valve plate air tightness testing device according to claim 1, characterized in that: The lower fixture (30) also includes a positioning recess (33) that corresponds one-to-one with the positioning element (14) on the air intake valve (10). It is located on one side of the first sealing ring (32) and is clearance-fitted with the positioning element (14).

4. The air compressor valve plate air tightness testing device according to claim 1, characterized in that: An air inlet (2111) is provided at one end of the piston rod (211) away from the upper fixture (40). The air inlet (2111) is connected to an external pipeline, through which clean air under positive pressure is introduced into the air inlet channel (2112).

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