High-airtightness detection valve group

Abstract

The utility model discloses a high air tightness detection valve group, relates to the solenoid valve technology field, the detection valve group comprises a valve body, a pressure reducing valve group, a solenoid valve group, a pressure sensor, a joint assembly, a silencer and a filter core assembly, the valve body is in fastening connection with the pressure reducing valve group, the valve body is in fastening connection with the solenoid valve group, the valve body is in fastening connection with the pressure sensor, and the filter core assembly is in fastening connection with the joint assembly. The valve body is in fastening connection with the connector assembly, the valve body is in fastening connection with the silencer, the valve body is in fastening connection with the filter element assembly, the pressure reducing valve set is communicated with the electromagnetic valve set through a pipeline, gas is subjected to pressure reduction through the pressure reducing valve set and the electromagnetic valve set, the gas is fed into or discharged out of the valve body through the connector assembly, and noise generated when the detection valve set works is reduced through the silencer. Impurities existing in gas are filtered through the filter element assembly and prevented from entering the pressure reducing valve set and the electromagnetic valve set along with the gas channel to damage the pressure reducing valve set and the electromagnetic valve set, and the pressure condition in the valve body is detected through the pressure sensor.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic valve technology, specifically a high airtightness detection valve assembly. Background Technology

[0002] With the continuous development and progress of the industrial field, solenoid valves and pressure reducing valves have been widely used in the field of industrial automation. Solenoid valves use electrical energy as power to connect electric actuators to drive valves, realize valve opening and closing and regulation actions, thereby achieving the purpose of switching the flow direction of pipeline media and reducing the pressure of pipeline media. Pressure reducing valves reduce the inlet pressure to a certain required outlet pressure by adjusting the inlet pressure, and rely on the energy of the medium itself to automatically maintain the outlet pressure stable.

[0003] Due to continuous industrial progress, single solenoid valves and pressure reducing valves can no longer meet industrial needs. Now, combinations of solenoid valves and pressure reducing valves are more commonly used in industrial production. However, the airtightness of valves produced by these combinations cannot be guaranteed, and the overall airtightness of the device cannot be tested. This makes it difficult to find areas with poor airtightness during industrial use, increasing the difficulty of subsequent maintenance. Summary of the Invention

[0004] The purpose of this invention is to provide a high airtightness detection valve assembly to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high airtightness detection valve assembly includes a valve body, a pressure reducing valve assembly, a solenoid valve assembly, a pressure sensor, a connector assembly, a silencer, and a filter element assembly. The valve body and the pressure reducing valve assembly are rigidly connected, the valve body and the solenoid valve assembly are rigidly connected, the valve body and the pressure sensor are rigidly connected, the valve body and the connector assembly are rigidly connected, the valve body and the silencer are rigidly connected, and the valve body and the filter element assembly are rigidly connected. The pressure reducing valve assembly and the solenoid valve assembly are connected by pipelines.

[0007] The valve body serves as the primary pressure-reducing area. Multiple air passages within the valve body allow gas to flow. Gas is reduced in pressure by passing through the pressure-reducing valve assembly and the solenoid valve assembly. Gas is then fed into or out of the valve body via a connector assembly. A silencer reduces noise during the operation of the detection valve assembly. A filter element assembly filters out impurities in the gas, preventing them from entering the pressure-reducing valve assembly and the solenoid valve assembly through the air passages and causing damage. A pressure sensor monitors the internal pressure of the valve body. If the internal pressure changes exceed the pressure-reducing capacity of the pressure-reducing valve assembly, it indicates a leak within the valve body.

[0008] Furthermore, the valve body is provided with an air inlet, an air outlet, and a pressure relief port. There are two connector assemblies, which are respectively connected to the air inlet and air outlet flanges. The silencer and the pressure relief port are fastened together.

[0009] The gas first enters the gas passage of the valve body through the connector assembly connected to the inlet, and then is depressurized by the pressure reducing valve group and the solenoid valve group before flowing out through the connector assembly connected to the outlet. The depressurized gas flows out through the pressure relief port and is silenced by the silencer. At the same time, it is connected to the inlet and outlet flanges through two connector assemblies respectively, which improves the overall airtightness of the device.

[0010] Furthermore, the pressure reducing valve assembly includes a first pressure reducing valve, a second pressure reducing valve, a third pressure reducing valve, and a fourth pressure reducing valve. Each of the first, second, third, and fourth pressure reducing valves has an inlet and an outlet, both of which are arranged downwards. The first, second, third, and fourth pressure reducing valves are all rigidly connected to the valve body. The first, second, third, and fourth pressure reducing valves are also rigidly connected to the valve body. The first, second, third, and fourth pressure reducing valves are connected to the solenoid valve assembly.

[0011] The system is equipped with a first, second, third, and fourth pressure-reducing valve, each with a different pressure-reducing capacity. Users can select the appropriate valve based on their needs. The pressure-reducing valves, in conjunction with a solenoid valve assembly, allow gas to be reduced in pressure within the valve body's air passage. The reduced-pressure gas then flows out through the outlet, controlled by the opening and closing of the solenoid valve assembly. The downward-facing inlets and outlets on the first, second, third, and fourth pressure-reducing valves enable modular integration between the pressure-reducing valve assembly and the valve body, achieving both integration and miniaturization of the pressure-reducing valve assembly.

[0012] Furthermore, the solenoid valve assembly includes a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid valve. The first solenoid valve is rigidly connected to the valve body, the second solenoid valve is rigidly connected to the valve body, the third solenoid valve is rigidly connected to the valve body, and the fourth solenoid valve is rigidly connected to the valve body. The first pressure reducing valve is connected to the first solenoid valve, the second pressure reducing valve is connected to the second solenoid valve, the third pressure reducing valve is connected to the third solenoid valve, and the fourth pressure reducing valve is connected to the fourth solenoid valve.

[0013] The first pressure-reducing valve and the first solenoid valve are connected, allowing the solenoid valve to control the flow of gas from the first pressure-reducing valve to the first solenoid valve, and then from the gas passage to the outlet. By controlling the opening and closing of the first solenoid valve, the direction of gas flow is controlled, thereby ensuring that the gas pressure flowing out of the outlet is the pressure reduced by the first pressure-reducing valve. The second pressure-reducing valve and the second solenoid valve are connected, allowing the second solenoid valve to control the flow of gas from the second pressure-reducing valve to the second solenoid valve, and then from the gas passage to the outlet. By controlling the opening and closing of the second solenoid valve, the direction of gas flow is controlled, thereby ensuring that the gas pressure flowing out of the outlet is the pressure reduced by the second pressure-reducing valve. The third pressure reducing valve and the third solenoid valve are connected, allowing the third solenoid valve to control the flow of gas from the third pressure reducing valve to the third solenoid valve and then from the gas passage to the outlet. By controlling the opening and closing of the third solenoid valve, the direction of gas flow is controlled, thereby controlling the gas pressure flowing out of the outlet to be the pressure reduced by the third pressure reducing valve. The fourth pressure reducing valve and the fourth solenoid valve are connected, allowing the fourth solenoid valve to control the flow of gas from the fourth pressure reducing valve to the fourth solenoid valve and then from the gas passage to the outlet. By controlling the opening and closing of the fourth solenoid valve, the direction of gas flow is controlled, thereby controlling the gas pressure flowing out of the outlet to be the pressure reduced by the fourth pressure reducing valve.

[0014] Furthermore, a pressure sealing ring is provided at the connection between the pressure sensor and the valve body. The pressure sealing ring abuts against the pressure sensor, and the end of the pressure sealing ring away from the pressure sensor abuts against the valve body. There are two pressure sensors, which respectively detect the intake pressure at the air inlet and the gas pressure after being reduced by the pressure reducing valve assembly.

[0015] By installing a pressure sealing ring at the connection between the pressure sensor and the valve body, the overall sealing performance of the device is improved. Two pressure sensors are installed to detect the gas pressure before and after depressurization, respectively. Based on the selected depressurization mode, it is determined whether there is a gas leak in the device.

[0016] Furthermore, the connector assembly includes a connector body and a connector sealing ring. The connector body and the valve body are fastened together, the connector sealing ring abuts against the connector body, and the end of the connector sealing ring away from the connector body abuts against the valve body.

[0017] The sealing ring on the joint improves the sealing performance of the connection between the joint body and the valve body, enhances the overall sealing effect of the device, prevents gas from flowing out from the connection gap between the joint body and the valve body, thus ensuring the overall sealing performance of the device and improving the accuracy of the test results of the test valve group.

[0018] Furthermore, the silencer uses porous sound-absorbing materials.

[0019] A silencer composed of porous sound-absorbing material improves the silencer's noise reduction effect.

[0020] Furthermore, the filter element assembly includes a filter element cover, a filter element body, a buffer ring, and a filter screen sealing gasket. The filter element cover and the valve body are fastened together. The filter element body is placed inside the valve body. The filter screen sealing gasket is placed inside the valve body. The filter element cover and the filter element body are fastened together. The buffer ring is placed on the outside of the filter element cover. The buffer ring abuts against the filter element cover. The side of the buffer ring away from the filter element cover abuts against the valve body. The filter screen sealing gasket abuts against the valve body. The filter screen sealing gasket abuts against the filter element cover.

[0021] The filter element body, as the main filtration element, has several through holes. Gas can enter the filter element body through these holes, while impurities in the gas are blocked outside the filter element body. This prevents impurities from entering the valve body's air passage and ultimately flowing into the pressure reducing valve assembly, thus damaging the assembly and reducing its pressure reducing effect. The filter element body then enters the valve body's air passage. A buffer ring and a filter screen sealing gasket are installed at the connection between the filter element cover and the valve body, increasing the sealing effect of the filter element cover on the valve body. This prevents gas leakage from the connection between the filter element cover and the valve body, thereby improving the overall sealing effect of the device.

[0022] Furthermore, the detection valve assembly also includes check valves, which abut against the valve body. There are four check valves, which are respectively located below the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve. The ends of the four check valves away from the valve body abut against the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve, respectively.

[0023] The check valve can prevent the backflow of gas that has passed through the first, second, third, and fourth solenoid valves and entered the air passage below the solenoid valve group, so that the gas can only flow in one direction in the valve body, thus improving the overall working efficiency.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] 1. By setting up pressure reducing valve group and solenoid valve group, different pressure reducing effects can be selected to reduce gas pressure as needed, thus increasing the application range.

[0026] 2. Two pressure sensors are installed. The changes in gas pressure before and after depressurization can be detected based on the data from the two sensors to determine whether the changes are within the working pressure range of the selected depressurization mode, thereby determining whether the device is leaking.

[0027] 3. By setting joint sealing rings, filter screen sealing gaskets and pressure sealing rings, the overall sealing performance of the device is improved, resulting in a better sealing effect.

[0028] 4. By arranging the inlet and outlet of the first, second, third, and fourth pressure reducing valves downwards, the pressure reducing valve group and valve body are modularly integrated and connected, achieving the integration and miniaturization of the valve group. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the pressure reducing valve assembly structure of this utility model;

[0031] Figure 3 for Figure 2 A magnified view of part A;

[0032] Figure 4 for Figure 3 A magnified view of part B;

[0033] Figure 5 This is a schematic diagram of the electromagnetic valve assembly structure of this utility model;

[0034] Figure 6 This is a schematic diagram of the valve body structure of this utility model;

[0035] Figure 7 This is a schematic diagram illustrating the working principle of this utility model.

[0036] In the diagram: 1. Valve body; 11. Air inlet; 12. Air outlet; 13. Pressure relief port; 2. Pressure reducing valve assembly; 21. First pressure reducing valve; 22. Second pressure reducing valve; 23. Third pressure reducing valve; 24. Fourth pressure reducing valve; 3. Solenoid valve assembly; 31. First solenoid valve; 32. Second solenoid valve; 33. Third solenoid valve; 34. Fourth solenoid valve; 4. Pressure sensor; 5. Connector assembly; 51. Connector body; 52. Connector sealing ring; 6. Silencer; 7. Filter element assembly; 71. Filter element cover; 72. Filter element body; 73. Buffer ring; 74. Filter screen sealing gasket; 8. Pressure sealing ring; 9. Check valve. Detailed Implementation

[0037] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0038] Example: Figures 1-7 As shown, this utility model provides a high airtightness detection valve assembly technical solution. The detection valve assembly includes a valve body 1, a pressure reducing valve assembly 2, a solenoid valve assembly 3, a pressure sensor 4, a connector assembly 5, a silencer 6, and a filter element assembly 7. The valve body 1 and the pressure reducing valve assembly 2 are fastened together, the valve body 1 and the solenoid valve assembly 3 are fastened together, the valve body 1 and the pressure sensor 4 are fastened together, the valve body 1 and the connector assembly 5 are fastened together, the valve body 1 and the silencer 6 are fastened together, the valve body 1 and the filter element assembly 7 are fastened together, and the pressure reducing valve assembly 2 and the solenoid valve assembly 3 are connected by pipelines.

[0039] Valve body 1 serves as the primary pressure-reducing point. Multiple air passages within valve body 1 allow gas flow. Gas is pressure-reduced through pressure-reducing valve assembly 2 and solenoid valve assembly 3. Gas is fed into or out of valve body 1 via connector assembly 5. A silencer 6 reduces noise during valve assembly operation. A filter element assembly 7 filters impurities in the gas, preventing them from entering and damaging pressure-reducing valve assembly 2 and solenoid valve assembly 3. Pressure sensor 4 monitors the internal pressure of valve body 1. If the internal pressure change exceeds the pressure-reducing capacity of pressure-reducing valve assembly 2, it indicates a leak within valve body 1.

[0040] like Figure 1 As shown, the valve body 1 is provided with an air inlet 11, an air outlet 12 and a pressure relief port 13. There are two connector assemblies 5, which are respectively connected to the flanges of the air inlet 11 and the air outlet 12. The silencer 6 is fastened to the pressure relief port 13.

[0041] The gas first enters the gas passage of the valve body 1 through the connector assembly 5 connected to the inlet 11, and then is depressurized by the pressure reducing valve assembly 2 and the solenoid valve assembly 3 before flowing out through the connector assembly 5 connected to the outlet 12. The depressurized gas flows out through the pressure relief port 13 and is silenced by the silencer 6. At the same time, the two connector assemblies are connected to the flanges of the inlet 11 and the outlet 12 respectively, which improves the overall airtightness of the device.

[0042] like Figure 1 , Figure 2 and Figure 7 As shown, the pressure reducing valve assembly 2 includes a first pressure reducing valve 21, a second pressure reducing valve 22, a third pressure reducing valve 23, and a fourth pressure reducing valve 24. Each of the first, second, third, and fourth pressure reducing valves has an inlet and an outlet, both of which are arranged downwards. The first, second, third, and fourth pressure reducing valves 21, 22, 23, and 24 are all fixedly connected to the valve body 1. The first, second, third, and fourth pressure reducing valves 24 are also fixedly connected to the valve body 1. The first, second, third, and fourth pressure reducing valves 21, 22, 23, and 24 are all connected to the solenoid valve assembly 3.

[0043] The system is equipped with a first pressure reducing valve 21, a second pressure reducing valve 22, a third pressure reducing valve 23, and a fourth pressure reducing valve 24, each with a different pressure reducing capacity. During use, the appropriate pressure reducing valve can be selected according to the requirements. The pressure reducing valves and the solenoid valve group 3 work together to reduce the pressure of the gas in the air passage of the valve body 1. The reduced gas flows out from the outlet 12 under the control of the opening and closing of the solenoid valve group 3. At the same time, the downward-arranged inlets and outlets on the first pressure reducing valve 21, the second pressure reducing valve 22, the third pressure reducing valve 23, and the fourth pressure reducing valve 24 realize the integrated connection between the pressure reducing valve group 2, the valve body 1, and the module, and also realize the integration and miniaturization of the pressure reducing valve group 2.

[0044] like Figure 1 , Figure 5 , Figure 6 and Figure 7 As shown, the solenoid valve assembly 3 includes a first solenoid valve 31, a second solenoid valve 32, a third solenoid valve 33, and a fourth solenoid valve 34. The first solenoid valve 31 is rigidly connected to the valve body 1, the second solenoid valve 32 is rigidly connected to the valve body 1, the third solenoid valve 33 is rigidly connected to the valve body 1, and the fourth solenoid valve 34 is rigidly connected to the valve body 1. The first pressure reducing valve 21 is connected to the first solenoid valve 31, the second pressure reducing valve 22 is connected to the second solenoid valve 32, the third pressure reducing valve 23 is connected to the third solenoid valve 33, and the fourth pressure reducing valve 24 is connected to the fourth solenoid valve 34.

[0045] The first pressure reducing valve 21 is connected to the first solenoid valve 31, allowing the first solenoid valve 31 to control the flow of gas from the first pressure reducing valve 21 to the first solenoid valve 31, and then from the gas passage to the outlet 12. By controlling the opening and closing of the first solenoid valve 31, the flow direction of the gas is controlled, thereby ensuring that the gas pressure flowing out of the outlet 12 is the pressure reduced by the first pressure reducing valve 21. The second pressure reducing valve 22 is connected to the second solenoid valve 32, allowing the second solenoid valve 32 to control the flow of gas from the second pressure reducing valve 22 to the second solenoid valve 32, and then from the gas passage to the outlet 12. By controlling the opening and closing of the second solenoid valve 32, the flow direction of the gas is controlled, thereby ensuring that the gas pressure flowing out of the outlet 12 is the pressure reduced by the second pressure reducing valve 22. The third pressure reducing valve 23 and the third solenoid valve 33 are connected, so that the third solenoid valve 33 can control the gas to flow from the third pressure reducing valve 23 to the third solenoid valve 33 and then from the gas passage to the outlet 12. By controlling the opening and closing of the third solenoid valve 33, the direction of gas flow is controlled, thereby controlling the gas pressure flowing out of the outlet 12 to be the pressure reduced by the third pressure reducing valve 23. The fourth pressure reducing valve 24 and the fourth solenoid valve 34 are connected, so that the fourth solenoid valve 34 can control the gas to flow from the fourth pressure reducing valve 24 to the fourth solenoid valve 34 and then from the gas passage to the outlet 12. By controlling the opening and closing of the fourth solenoid valve 34, the direction of gas flow is controlled, thereby controlling the gas pressure flowing out of the outlet 12 to be the pressure reduced by the fourth pressure reducing valve 24.

[0046] like Figure 1 , Figure 2 and Figure 4 As shown, a pressure sealing ring 8 is provided at the connection between the pressure sensor 4 and the valve body 1. The pressure sealing ring 8 and the pressure sensor 4 abut against each other. The end of the pressure sealing ring 8 away from the pressure sensor 4 abuts against the valve body 1. There are two pressure sensors 4. The two pressure sensors 4 respectively detect the intake pressure of the air inlet 11 and the gas pressure after pressure reduction through the pressure reducing valve group 2.

[0047] By installing the pressure sealing ring 8 at the connection between the pressure sensor 4 and the valve body 1, the overall sealing performance and sealing effect of the device are improved. The two pressure sensors 4 are used to detect the gas pressure before and after depressurization, respectively. Based on the selected depressurization mode, it is determined whether there is a gas leak in the device.

[0048] like Figures 1-3 As shown, the connector assembly 5 includes a connector body 51 and a connector sealing ring 52. The connector body 51 and the valve body 1 are fastened together. The connector sealing ring 52 abuts against the connector body 51. The end of the connector sealing ring 52 away from the connector body 51 abuts against the valve body 1.

[0049] The sealing ring 52 improves the sealing performance of the connection between the connector body 51 and the valve body 1, enhances the overall sealing effect of the device, prevents gas from flowing out from the connection gap between the connector body 51 and the valve body 1, thereby ensuring the overall sealing performance of the device and improving the accuracy of the detection results of the detection valve group.

[0050] like Figure 1 As shown, the muffler 6 uses porous sound-absorbing material.

[0051] The sound-absorbing effect of the silencer 6 is improved by using a silencer 6 composed of porous sound-absorbing material.

[0052] like Figures 1-3 As shown, the filter element assembly 7 includes a filter element cover 71, a filter element body 72, a buffer ring 73, and a filter screen sealing gasket 74. The filter element cover 71 is fastened to the valve body 1. The filter element body 72 is placed inside the valve body 1. The filter screen sealing gasket 74 is placed inside the valve body 1. The filter element cover 71 and the filter element body 72 are fastened to each other. The buffer ring 73 is sleeved on the outside of the filter element cover 71. The buffer ring 73 abuts against the filter element cover 71. The side of the buffer ring 73 away from the filter element cover 71 abuts against the valve body 1. The filter screen sealing gasket 74 abuts against the valve body 1. The filter screen sealing gasket 74 abuts against the filter element cover 71.

[0053] The filter element body 72, as the main filter element, has several through holes, allowing gas to enter the filter element body 72 through the through holes. At the same time, impurities in the gas are blocked outside the filter element body 72 by the through holes, preventing them from entering the air passage of the valve body 1 through the filter element body 72 and ultimately flowing into the pressure reducing valve assembly 2, thereby damaging the pressure reducing valve assembly 2 and reducing its pressure reducing effect. The gas then enters the air passage of the valve body 1 from the filter element body 72. By setting a buffer ring 73 and a filter screen sealing gasket 74 at the connection between the filter element cover 71 and the valve body 1, the sealing effect of the filter element cover 71 on the valve body 1 is increased, preventing gas from leaking from the connection between the filter element cover 71 and the valve body 1, thereby improving the overall sealing effect of the device.

[0054] like Figure 5 and Figure 7 As shown, the detection valve group also includes check valves 9, which abut against the valve body 1. There are four check valves 9, which are respectively located below the first solenoid valve 31, the second solenoid valve 32, the third solenoid valve 33, and the fourth solenoid valve 34. The ends of the four check valves 9 away from the valve body 1 abut against the first solenoid valve 31, the second solenoid valve 32, the third solenoid valve 33, and the fourth solenoid valve 34.

[0055] The check valve 9 can prevent the backflow of gas that has entered the air passage below the solenoid valve group 3 through the first solenoid valve 31, the second solenoid valve 32, the third solenoid valve 33 and the fourth solenoid valve 34, so that the gas can only flow in one direction in the valve body 1, thereby improving the overall working efficiency.

[0056] The working principle of this utility model is as follows: Gas enters the valve body 1 through the connector body 51 connected to the inlet 11. Then, impurities in the gas are blocked outside the filter body 72, preventing them from entering the air passage of the valve body 1 and ultimately flowing into the pressure reducing valve assembly 2, thus damaging the pressure reducing valve assembly 2 and reducing its pressure-reducing effect. After the gas enters the air passage of the valve body 1, the corresponding solenoid valve is opened as needed. Opening the first solenoid valve 31 controls the gas to flow from the first pressure reducing valve 21 to the outlet 12, reducing the gas pressure to within the control range of the first pressure reducing valve 21. Opening the second solenoid valve 32 controls the gas to flow from the second pressure reducing valve 22 to the outlet 12, reducing the gas pressure to within the control range of the second pressure reducing valve 22. Opening the third solenoid valve 33... The gas is controlled to flow from the third pressure reducing valve 23 to the third solenoid valve 33 and then from the gas passage to the outlet 12, so that the gas pressure can be reduced to the control range of the third pressure reducing valve 23. By opening the fourth solenoid valve 34, the gas can be controlled to flow from the fourth pressure reducing valve 24 to the fourth solenoid valve 34 and then from the gas passage to the outlet 12, so that the gas pressure can be reduced to the control range of the fourth pressure reducing valve 24. By opening different solenoid valves, the gas pressure is reduced accordingly. At the same time, the check valve 9 prevents the backflow of gas entering the gas passage below the solenoid valve group 3. Then, the two pressure sensors 4 are set to detect the gas pressure before and after pressure reduction respectively. Based on the selected pressure reduction mode, it is determined whether there is a gas leak in the device. At the same time, the excess gas in the pressure reducing valve group 2 and the solenoid valve group 3 is discharged through the pressure relief port 13. The noise of the pressure relief port 13 is reduced by the silencer 6.

[0057] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high airtightness detection valve assembly, characterized in that: The detection valve assembly includes a valve body (1), a pressure reducing valve assembly (2), a solenoid valve assembly (3), a pressure sensor (4), a connector assembly (5), a silencer (6), and a filter element assembly (7). The valve body (1) and the pressure reducing valve assembly (2) are fastened together. The valve body (1) and the solenoid valve assembly (3) are fastened together. The valve body (1) and the pressure sensor (4) are fastened together. The valve body (1) and the connector assembly (5) are fastened together. The valve body (1) and the silencer (6) are fastened together. The valve body (1) and the filter element assembly (7) are fastened together. The pressure reducing valve assembly (2) and the solenoid valve assembly (3) are connected by a pipeline.

2. The high airtightness detection valve assembly according to claim 1, characterized in that: The valve body (1) is provided with an air inlet (11), an air outlet (12) and a pressure relief port (13). There are two connector assemblies (5). The two connector assemblies (5) are respectively connected to the flanges of the air inlet (11) and the air outlet (12). The silencer (6) and the pressure relief port (13) are fastened together.

3. The high airtightness detection valve assembly according to claim 1, characterized in that: The pressure reducing valve assembly (2) includes a first pressure reducing valve (21), a second pressure reducing valve (22), a third pressure reducing valve (23), and a fourth pressure reducing valve (24). The first pressure reducing valve (21), the second pressure reducing valve (22), the third pressure reducing valve (23), and the fourth pressure reducing valve (24) are provided with inlets and outlets, and the inlets and outlets are arranged downwards. The first pressure reducing valve (21) is fastened to the valve body (1), the second pressure reducing valve (22) is fastened to the valve body (1), the third pressure reducing valve (23) is fastened to the valve body (1), and the fourth pressure reducing valve (24) is fastened to the valve body (1). The first pressure reducing valve (21) is connected to the solenoid valve assembly (3), the second pressure reducing valve (22) is connected to the solenoid valve assembly (3), the third pressure reducing valve (23) is connected to the solenoid valve assembly (3), and the fourth pressure reducing valve (24) is connected to the solenoid valve assembly (3).

4. The high airtightness detection valve assembly according to claim 3, characterized in that: The solenoid valve group (3) includes a first solenoid valve (31), a second solenoid valve (32), a third solenoid valve (33), and a fourth solenoid valve (34). The first solenoid valve (31) is fastened to the valve body (1), the second solenoid valve (32) is fastened to the valve body (1), the third solenoid valve (33) is fastened to the valve body (1), and the fourth solenoid valve (34) is fastened to the valve body (1). The first pressure reducing valve (21) is connected to the first solenoid valve (31), the second pressure reducing valve (22) is connected to the second solenoid valve (32), the third pressure reducing valve (23) is connected to the third solenoid valve (33), and the fourth pressure reducing valve (24) is connected to the fourth solenoid valve (34).

5. The high airtightness detection valve assembly according to claim 4, characterized in that: A pressure sealing ring (8) is provided at the connection between the pressure sensor (4) and the valve body (1). The pressure sealing ring (8) and the pressure sensor (4) abut against each other. The end of the pressure sealing ring (8) away from the pressure sensor (4) abuts against the valve body (1). There are two pressure sensors (4). The two pressure sensors (4) respectively detect the intake pressure of the air inlet (11) and the gas pressure after pressure reduction through the pressure reducing valve group (2).

6. The high airtightness detection valve assembly according to claim 5, characterized in that: The connector assembly (5) includes a connector body (51) and a connector sealing ring (52). The connector body (51) and the valve body (1) are fastened together. The connector sealing ring (52) abuts against the connector body (51). The end of the connector sealing ring (52) away from the connector body (51) abuts against the valve body (1).

7. A high airtightness detection valve assembly according to claim 6, characterized in that: The silencer (6) is made of porous sound-absorbing material.

8. A high airtightness detection valve assembly according to claim 7, characterized in that: The filter element assembly (7) includes a filter element cover (71), a filter element body (72), a buffer ring (73), and a filter screen sealing gasket (74). The filter element cover (71) and the valve body (1) are fastened together. The filter element body (72) is placed inside the valve body (1). The filter screen sealing gasket (74) is placed inside the valve body (1). The filter element cover (71) and the filter element body (72) are fastened together. The buffer ring (73) is fitted on the outside of the filter element cover (71). The buffer ring (73) abuts against the filter element cover (71). The side of the buffer ring (73) away from the filter element cover (71) abuts against the valve body (1). The filter screen sealing gasket (74) abuts against the valve body (1). The filter screen sealing gasket (74) abuts against the filter element body (72).

9. A high airtightness detection valve assembly according to claim 7, characterized in that: The detection valve group also includes a check valve (9), which abuts against the valve body (1). There are four check valves (9), which are respectively placed below the first solenoid valve (31), the second solenoid valve (32), the third solenoid valve (33), and the fourth solenoid valve (34). The ends of the four check valves (9) away from the valve body (1) abut against the first solenoid valve (31), the second solenoid valve (32), the third solenoid valve (33), and the fourth solenoid valve (34).

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