Air path control device capable of being used for air tightness test
By designing the integrated valve seat and airway assembly in the gas circuit control device, reducing the connection points and using solenoid valves and precision pressure regulating valves, the problems of many leakage points and poor assembly in the prior art are solved, and a higher Economy and maintenance ease.
Patent Information
- Application Number
- CN202420212375.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-29
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-01-29
AI Technical Summary
There are a large number of connecting valve heads in the connections of existing air-tight test devices, resulting in many leak points, poor assembly, poor economy and inconvenient maintenance.
An air-channel control device was designed to reduce the connection points by setting a normally open air-control valve, a normally closed air-control valve and an air-channel assembly in the air-channel integrated valve seat, and adopting a solenoid valve and a precision pressure regulating valve to achieve the independence of the air-channel. The channel reduces the number of air-controlled valves and forms an independent air duct through the processing of metal copper blocks.
It effectively reduces leakage points, enhances assembly, reduces the number of air-controlled valves, improves economy, and simplifies the maintenance process.
Smart Images
Figure CN222336685U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an air path control device which can be used for air tightness testing and belongs to the field of air tightness testing. Background Art
[0002] At present, in the airtight test device, the use of differential pressure sensors can ensure high-precision leakage testing. At this time, two independent airways are required, one as the standard test airway and the other as the test test airway. The current practice is to use one set of air pipes as the airway, and connect two air control valves to one set of air pipes to form a standard airway; the other test airway also requires two air control valves to be connected to one set of air pipes. However, this method uses a large number of connecting valve heads at the connection, which will have leakage points and poor assembly performance. At the same time, the number of air control valves is also large, which is poor in economy and inconvenient to maintain. Summary of the invention
[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an air path control device that can be used for air tightness testing, which has fewer connectors, thereby reducing leakage points, good economy and convenient maintenance.
[0004] In order to solve the above technical problems, the technical solution of the utility model is:
[0005] A gas circuit control device that can be used for air tightness testing, comprising an air source system, a solenoid valve assembly, a precision pressure regulating valve and a gas circuit integrated valve seat, wherein the top of the gas circuit integrated valve seat is connected with a normally open gas control valve, a normally closed gas control valve, a differential pressure sensor and a direct pressure sensor, and the right side wall of the gas circuit integrated valve seat is connected with an air intake connector, the air source system is respectively connected to the input ends of the solenoid valve assembly and the precision pressure regulating valve, the output end of the solenoid valve assembly is respectively connected to the normally open gas control valve and the normally closed gas control valve, and the output end of the precision pressure regulating valve is connected to the input end of the air intake connector;
[0006] An airway assembly is arranged in the airway integrated valve seat, and the airway assembly includes a first airway, a second airway, an air inlet and an exhaust port, the output end of the air inlet joint is connected to the input end of the air inlet, the output end of the air inlet is connected to the input end of the normally closed air-controlled valve, the first output end of the normally closed air-controlled valve is connected to the first input end of the normally open air-controlled valve through the first airway, the second output end of the normally closed air-controlled valve is connected to the second input end of the normally open air-controlled valve through the second airway, and the output end of the normally open air-controlled valve is connected to the exhaust port;
[0007] One end of the differential pressure sensor is connected to the first output end of the normally closed air-controlled valve through the first air channel, the other end of the differential pressure sensor is connected to the second output end of the normally closed air-controlled valve through the second air channel, and the direct pressure sensor is connected to the first input end of the normally open air-controlled valve through the first air channel.
[0008] Further, the normally open air-controlled valve includes a first joint, a first valve cover, a first valve body, a first piston valve head, a first spring, a first valve stem and a first sealing gasket, the first joint is connected to the first valve cover, the first valve cover is connected to the top of the first valve body, the top of the first valve stem is connected to the first piston valve head, one end of the first spring abuts against the first piston valve head, and the other end of the first spring abuts against the middle of the first valve body, the first input end, the second input end and the output end of the normally closed air-controlled valve are all arranged at the bottom of the first valve body, the first piston valve head drives the first valve stem to move up and down in the inner cavity of the first valve body, the first sealing gasket is fixed at the bottom of the first valve stem, and the first sealing gasket is used to open or close the first input end, the second input end and the output end of the normally open air-controlled valve.
[0009] Further, the normally closed air-controlled valve includes a second joint, a second valve cover, a second valve body, a second piston valve head, a second spring, a second valve stem, and a second sealing gasket. The second joint is connected to the side wall of the second valve body, the second valve cover is connected to the top of the second valve body, the top of the second valve stem is connected to the second piston valve head, one end of the second spring abuts against the second valve cover, and the other end of the second spring abuts against the second piston valve head. The input end, the first output end, and the second output end of the normally closed air-controlled valve are all arranged at the bottom of the second valve body. The second piston valve head drives the second valve stem to move up and down in the second valve body. The second sealing gasket is fixed at the bottom of the second valve stem. The second sealing gasket is used to open or close the input end, the first output end, and the second output end of the normally closed air-controlled valve.
[0010] Furthermore, a first manual switch valve and a second manual switch valve are provided on the left side wall of the gas path integrated valve seat, the first gas channel is connected to the standard product through the first manual switch valve, and the second gas channel is connected to the test product through the second manual switch valve.
[0011] By adopting the above-mentioned technical scheme, the utility model arranges the air circuit integrated valve seat, the normally open air-controlled valve, the normally closed air-controlled valve and the air duct component in the air circuit integrated valve seat, and the air duct is built into the air circuit integrated valve seat, which can effectively reduce the connection points, reduce the leakage points, enhance the assembly performance, reduce the number of air-controlled valves, and improve the economy. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of a gas path control device that can be used for airtightness testing of the utility model;
[0013] Figure 2 It is an exploded schematic diagram of an air path control device that can be used for air tightness testing of the utility model;
[0014] Figure 3 It is a structural schematic diagram of the airway component of the utility model;
[0015] Figure 4 It is an internal schematic diagram of the normally open gas-controlled valve of the utility model;
[0016] Figure 5 It is an internal schematic diagram of the normally closed air-controlled valve of the utility model. DETAILED DESCRIPTION
[0017] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.
[0018] like Figure 1 , 2 As shown, this embodiment provides an air circuit control device that can be used for air tightness testing, which includes an air source system 1, a solenoid valve assembly 9, a precision pressure regulating valve 4 and an air circuit integrated valve seat 5, and the top of the air circuit integrated valve seat 5 is connected to a normally open air control valve 2, a normally closed air control valve 3, a differential pressure sensor 6 and a direct pressure sensor 7.
[0019] An air inlet connector 8 is connected to the right side wall of the air circuit integrated valve seat 5, a manual switch valve is connected to the left side wall of the air circuit integrated valve seat 5, and the air source system 1 is respectively connected to the input ends of the solenoid valve assembly 9 and the precision pressure regulating valve 4. The solenoid valve assembly 9 includes two solenoid valves, the output ends of the two solenoid valves are respectively connected to the normally open air control valve 2 and the normally closed air control valve 3, and the output end of the precision pressure regulating valve 4 is connected to the input end of the air inlet connector 8.
[0020] like Figure 1 , 2 As shown in Figure 3, an air duct assembly is arranged in the air path integrated valve seat 5 of the present embodiment, and the air duct assembly includes a first air duct 51, a second air duct 52, an air inlet 53 and an exhaust port 54. The output end of the air inlet connector 8 is connected to the input end of the air inlet 53, the output end of the air inlet 53 is connected to the input end of the normally closed air-controlled valve 3, the first output end of the normally closed air-controlled valve 3 is connected to the first input end of the normally open air-controlled valve 2 through the first air duct 51, the second output end of the normally closed air-controlled valve 3 is connected to the second input end of the normally open air-controlled valve 2 through the second air duct 52, and the output end of the normally open air-controlled valve 2 is connected to the exhaust port 54.
[0021] The gas path integrated valve seat 5 of this embodiment is made of a whole piece of metal copper. A cross through hole is formed inside the copper block by machining, and the unnecessary leakage points on the outside are blocked with metal plugs 57 to make it airtight, so that there are two independent air passages inside the copper block. One of the two independent air passages is the standard air passage, and the other is the test air passage.
[0022] like Figure 1 , 2As shown, the left side wall of the gas circuit integrated valve seat 5 of this embodiment is provided with a first manual switch valve 55 and a second manual switch valve 56. The first gas channel 51 is connected to the standard product through the first manual switch valve 55, and the second gas channel 52 is connected to the test product through the second manual switch valve 56. The first gas channel 51 vents to the standard product through the first manual switch valve 55, and the second gas channel 52 vents to the test product through the second manual switch valve 56. When working, the first manual switch valve 55 and the second manual switch valve 56 are opened.
[0023] like Figure 1 , 2 As shown, one end of the differential pressure sensor 6 of this embodiment is connected to the first output end of the normally closed air control valve 3 through the first air channel 51, and the other end of the differential pressure sensor 6 is connected to the second output end of the normally closed air control valve 3 through the second air channel 52. The direct pressure sensor 7 is connected to the first input end of the normally open air control valve 2 through the first air channel 51. The direct pressure sensor 7 is used to test whether there is an abnormality in the intake pressure. When the test product has a leak, the internal and external air pressure difference will change, and the highly sensitive differential pressure sensor 6 will detect this change.
[0024] like Figure 4 As shown, the normally open air-controlled valve 2 of this embodiment includes a first joint 15, a first valve cover 16, a first valve body 17, a first piston valve head 18, a first spring 19, a first valve stem 20 and a first sealing gasket 21. The first joint 15 is connected to the first valve cover 16, the first valve cover 16 is connected to the top of the first valve body 17, the top of the first valve stem 20 is connected to the first piston valve head 18, one end of the first spring 19 abuts against the first piston valve head 18, and the other end of the first spring 19 abuts against the middle of the first valve body 17. The first input end, the second input end and the output end of the normally closed air-controlled valve 3 are all arranged at the bottom of the first valve body 17. The first piston valve head 18 drives the first valve stem 20 to move up and down in the inner cavity of the first valve body 17. The first sealing gasket 21 is fixed to the bottom of the first valve stem 20. The first sealing gasket 21 is used to open or close the first input end, the second input end and the output end of the normally open air-controlled valve 2.
[0025] The opening and closing of the normally open air-controlled valve 2 is driven by the solenoid valve assembly 9. The first connector 15 receives the pressurized gas from the solenoid valve assembly 9. After the gas enters the first valve body 17 from the first valve cover 16, the first piston valve head 18 is pressed down, and the first sealing gasket 21 blocks the first input end, the second input end and the output end of the normally open air-controlled valve 2, thereby realizing the closing of the normally open air-controlled valve 2.
[0026] like Figure 5As shown, the normally closed air-controlled valve 3 of this embodiment includes a second joint 22, a second valve cover 23, a second valve body 24, a second piston valve head 25, a second spring 26, a second valve stem 27, and a second sealing gasket 28. The second joint 22 is connected to the side wall of the second valve body 24, the second valve cover 23 is connected to the top of the second valve body 24, the top of the second valve stem 27 is connected to the second piston valve head 25, one end of the second spring 26 abuts against the second valve cover 23, and the other end of the second spring 26 abuts against the second piston valve head 25. The input end, the first output end and the second output end of the normally closed air-controlled valve 3 are all arranged at the bottom of the second valve body 24. The second piston valve head 25 drives the second valve stem 27 to move up and down in the second valve body 24. The second sealing gasket 28 is fixed to the bottom of the second valve stem 27. The second sealing gasket 28 is used to open or close the input end, the first output end and the second output end of the normally closed air-controlled valve 3.
[0027] The opening and closing of the normally closed air-controlled valve 3 is driven by the solenoid valve assembly 9. The second connector 22 receives the pressurized gas from the solenoid valve assembly 9. After the gas enters the second valve body 24, it pushes the first piston valve head 18 upward, and the second sealing gasket 28 opens the first input end, the second input end and the output end of the normally open air-controlled valve 2, thereby realizing the opening and ventilation of the normally closed air-controlled valve 3.
[0028] The working principle of the utility model is as follows:
[0029] 1. Ventilate the standard product and the test product: At this time, the normally closed air control valve 3 is opened, the normally open air control valve 2 is closed, and the air source system 1 ventilates the first airway 51 and the second airway 52 through the precision pressure regulating valve 4. The air pressure can be adjusted by the precision pressure regulating valve 4. The two airways ventilate the standard product and the test product respectively, and the direct pressure sensor 7 can monitor the pressure value of the intake air in real time.
[0030] 2. Air pressure maintenance: After the air intake pressure reaches the test requirement, the normally closed air control valve 3 is closed, the normally open air control valve 2 is turned off, and the air source system 1 stops supplying air. Disconnect the air between the standard product and the test product and wait for the pressure to stabilize. If the differential pressure sensor 6 detects the pressure difference between the two airways, it can be determined that the test product has a leak and the test product fails.
[0031] 3. End of test: After the test is completed, open the normally open air control valve 2 and exhaust air from the exhaust port 54.
[0032] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A gas path control device that can be used for airtightness testing, characterized in that: It comprises an air source system (1), an electromagnetic valve assembly (9), a precision pressure regulating valve (4) and an air circuit integrated valve seat (5); the top of the air circuit integrated valve seat (5) is connected to a normally open air control valve (2), a normally closed air control valve (3), a differential pressure sensor (6) and a direct pressure sensor (7); the right side wall of the air circuit integrated valve seat (5) is connected to an air intake connector (8); the air source system (1) is respectively connected to the input ends of the electromagnetic valve assembly (9) and the precision pressure regulating valve (4); the output end of the electromagnetic valve assembly (9) is respectively connected to the normally open air control valve (2) and the normally closed air control valve (3); the output end of the precision pressure regulating valve (4) is connected to the input end of the air intake connector (8); An airway assembly is arranged in the airway integrated valve seat (5), and the airway assembly comprises a first airway (51), a second airway (52), an air inlet (53) and an air outlet (54); the output end of the air inlet connector (8) is connected to the input end of the air inlet (53); the output end of the air inlet (53) is connected to the input end of the normally closed air-controlled valve (3); the first output end of the normally closed air-controlled valve (3) is connected to the first input end of the normally open air-controlled valve (2) via the first airway (51); the second output end of the normally closed air-controlled valve (3) is connected to the second input end of the normally open air-controlled valve (2) via the second airway (52); and the output end of the normally open air-controlled valve (2) is connected to the air outlet (54); One end of the differential pressure sensor (6) is connected to the first output end of the normally closed air-controlled valve (3) via a first air channel (51), the other end of the differential pressure sensor (6) is connected to the second output end of the normally closed air-controlled valve (3) via a second air channel (52), and the direct pressure sensor (7) is connected to the first input end of the normally open air-controlled valve (2) via the first air channel (51).
2. The gas path control device for airtightness testing according to claim 1, characterized in that: The normally open air-controlled valve (2) comprises a first joint (15), a first valve cover (16), a first valve body (17), a first piston valve head (18), a first spring (19), a first valve stem (20) and a first sealing gasket (21), wherein the first joint (15) is connected to the first valve cover (16), the first valve cover (16) is connected to the top of the first valve body (17), the top of the first valve stem (20) is connected to the first piston valve head (18), one end of the first spring (19) is in contact with the first piston valve head (18), and the first valve stem (20) is connected to the first piston valve head (18). The other end of the first spring (19) abuts against the middle of the first valve body (17); the first input end, the second input end and the output end of the normally closed air-controlled valve (3) are all arranged at the bottom of the first valve body (17); the first piston valve head (18) drives the first valve stem (20) to move up and down in the inner cavity of the first valve body (17); the first sealing gasket (21) is fixed at the bottom of the first valve stem (20); the first sealing gasket (21) is used to open or close the first input end, the second input end and the output end of the normally open air-controlled valve (2).
3. The gas path control device for airtightness testing according to claim 1, characterized in that: The normally closed air-controlled valve (3) comprises a second joint (22), a second valve cover (23), a second valve body (24), a second piston valve head (25), a second spring (26), a second valve stem (27), and a second sealing gasket (28); the second joint (22) is connected to a side wall of the second valve body (24); the second valve cover (23) is connected to the top of the second valve body (24); the top of the second valve stem (27) is connected to the second piston valve head (25); one end of the second spring (26) is in contact with the second valve cover (23); The other end of the second spring (26) is in contact with the second piston valve head (25); the input end, the first output end and the second output end of the normally closed air control valve (3) are all arranged at the bottom of the second valve body (24); the second piston valve head (25) drives the second valve stem (27) to move up and down in the second valve body (24); the second sealing gasket (28) is fixed at the bottom of the second valve stem (27); the second sealing gasket (28) is used to open or close the input end, the first output end and the second output end of the normally closed air control valve (3).
4. The gas path control device for airtightness testing according to claim 1, characterized in that: A first manual switch valve (55) and a second manual switch valve (56) are provided on the left side wall of the gas path integrated valve seat (5); the first gas channel (51) is connected to the standard product via the first manual switch valve (55); and the second gas channel (52) is connected to the test product via the second manual switch valve (56).