Detection system for sealing ventilation valve

Abstract

The utility model relates to a detection system for sealing a ventilation valve, and belongs to the technical field of automobile part detection. A pneumatic duplex piece is connected with a test loop, the test loop comprises an air tightness test loop and a flow test loop, the air tightness test loop is used for air tightness test, the flow test loop is used for flow test, and the test loop further comprises a plugging circuit connected with an air outlet of a product to be tested. The working principle of the device is that detection of airtightness and flow of a product is realized by switching a detection gas circuit and pressure feedback and controlling a plugging cylinder by using a control loop. The device is compact in structure, convenient to operate, and capable of accurately and efficiently detecting the performance of the sealed ventilation valve.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts testing technology, and in particular to a testing system for sealing and venting valves. Background Technology

[0002] With the development of automotive parts manufacturing technology, valve products for sealing and ventilation have emerged. These products are used to ensure the airtightness and permeability of automotive parts, which in turn leads to the need for airtightness testing and flow testing of valves.

[0003] In related technologies, sealing is achieved by tightening threads and utilizing product seals, followed by airtightness and flow rate testing. This method requires manual operation, is cumbersome, and carries the risk of leakage from threaded connections, potentially leading to product defects. Furthermore, the product seals are easily damaged during testing, affecting test accuracy and product lifespan. In addition, this testing method is inefficient and unsuitable for mass production needs.

[0004] Therefore, the above-mentioned thread seal testing method has problems such as high leakage risk, easy damage to the seal, and low testing efficiency. There is an urgent need to develop a testing system for sealing and venting valves. Utility Model Content

[0005] In response to the shortcomings of the existing production technology, the applicant provides a detection system for sealing and venting valves, which enables the detection of air tightness and flow rate of the product by switching the detection air path and pressure feedback and the synergistic effect of the sealing cylinder.

[0006] The technical solution adopted in this utility model is as follows: A detection system for a sealed and breathable valve, comprising:

[0007] A pneumatic dual unit with a test circuit connected in the air outlet direction;

[0008] The test circuit includes a parallel airtightness test circuit and a flow test circuit;

[0009] The airtightness test circuit is connected in series with a precision pressure regulating valve, a leak detector and a first pneumatic sealing valve, and is connected to the air inlet of the product under test;

[0010] The flow test circuit consists of a two-way solenoid valve, a precision filter, an electro-proportional valve, a flow meter, a first pressure sensor, and a second pneumatic sealing valve connected in series, and is connected to the air inlet of the product under test.

[0011] The outlet of the product under test is connected to a blocking line, which includes an airtight block and a flow blocking line.

[0012] The airtight plugging includes an airtight pressure cylinder, and the flow plugging includes a second pressure sensor and a flow pressure cylinder connected in series.

[0013] The electro-proportional valve is dynamically adjusted based on the pressure difference between the first pressure sensor and the second pressure sensor.

[0014] As a further improvement to the above technical solution:

[0015] Preferably, in the airtightness test circuit, the precision pressure regulating valve is used to accurately control the pressure of the detection gas, the leak detector is used to detect the airtightness of the product under test, and the first pneumatic sealing valve is used to switch the airtightness test state.

[0016] Preferably, in the flow test circuit, the two-way solenoid valve is used to open and close the flow detection channel, the precision filter is used to purify the detection gas, the electro-proportional valve dynamically adjusts the gas flow rate based on pressure feedback, and the flow meter is used to measure the gas flow rate value.

[0017] Preferably, the airtight plug and the flow plug are connected in parallel; during the airtightness test, the airtightness pressure cylinder seals the outlet; during the flow rate test, the flow rate pressure cylinder provides dynamic pressure compensation to the outlet.

[0018] Preferably, the pressure difference between the air inlet and outlet of the product under test is monitored in real time by a first pressure sensor and a second pressure sensor, and the opening of the electro-proportional valve is controlled by the feedback signal to maintain a stable pressure for flow testing.

[0019] Preferably, it also includes a control circuit for driving the cylinder of the blocking line.

[0020] Preferably, the operating modes of the detection system include at least an airtightness detection mode and a flow detection mode.

[0021] More preferably, in the airtightness testing mode, the two-way solenoid valve is closed, the second pneumatic sealing valve is closed, the leak detector and the first pneumatic sealing valve are open, the detection gas is input into the product under test through the airtightness test circuit, and the outlet is sealed by the airtightness pressurizing cylinder.

[0022] More preferably, in the flow detection mode, the leak detector is turned off, the first pneumatic sealing valve is closed, and the two-way solenoid valve, electro-proportional valve, flow meter, first pressure sensor and second pneumatic sealing valve are opened. The detection gas is input to the product under test through the flow test circuit, and the outlet pressure is dynamically adjusted by the flow pressure cylinder.

[0023] Preferably, the pneumatic dual unit includes an air filter and a pressure regulator for providing the detection system with clean and pressure-stable detection gas.

[0024] The beneficial effects of this utility model are as follows:

[0025] This utility model has a compact structure and achieves automated testing by working in concert with the pneumatic dual-unit and the test circuit, reducing manual operation steps and improving testing efficiency.

[0026] This utility model also has the following advantages:

[0027] (1) This utility model adopts a gas-tight plugging and flow-tightening structure, and achieves sealing and dynamic pressure compensation through cylinder action, which reduces the risk of leakage and avoids damage to the sealing components;

[0028] (2) The airtightness test circuit of this utility model is equipped with a precision pressure regulating valve and a leak detector, while the flow test circuit includes an electric proportional valve, a flow meter and a pressure sensor, which can accurately control the test conditions and monitor the data in real time to ensure the accuracy of the test results. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structural principle of this utility model.

[0030] Figure 2 This is a schematic diagram of the gas path through the product to be tested in this utility model.

[0031] The components include: 1. Pneumatic dual-unit; 2. Product under test; 3. Test circuit; 4. Hermetic plug; 5. Flow plug;

[0032] 301. Air tightness test circuit; 302. Flow rate test circuit;

[0033] 3011. Precision pressure regulating valve; 3012. Leak detector; 3013. First pneumatic sealing valve;

[0034] 3021. Two-way solenoid valve; 3022. Precision filter; 3023. Electro-proportional valve; 3024. Flow meter; 3025. First pressure sensor; 3026. Second pneumatic sealing valve;

[0035] 401. Airtight upper pressure cylinder;

[0036] 501. Second pressure sensor; 502. Flow-pressurizing cylinder. Detailed Implementation

[0037] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0038] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0041] It should be understood that although the terms "first," "second," etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0042] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0043] like Figures 1-2 The accompanying drawing shows a schematic diagram of the structural state of a detection system for a sealed and breathable valve according to an embodiment of the present invention; for ease of description, the drawing only shows the structure related to the embodiment of the present invention.

[0044] In this embodiment, a testing system for sealing and venting valves is provided, including a pneumatic dual unit 1, with a test circuit 3 connected in the air outlet direction; the test circuit 3 includes a parallel airtightness test circuit 301 and a flow test circuit 302; the airtightness test circuit 301 is connected in series with a precision pressure regulating valve 3011, a leak detector 3012, and a first pneumatic sealing valve 3013, and is connected to the air inlet of the product under test 2; the flow test circuit 302 is connected in series with a two-way solenoid valve 3021, a precision filter 3022, an electro-proportional valve 3023, a flow meter 3024, a first pressure sensor 3025, and a second pneumatic sealing valve 3026, and is connected to the air inlet of the product under test 2; the air outlet of the product under test 2 is connected to a sealing line, which includes an airtight plug 4 and a flow sealing plug 5; the airtight plug 4 includes an airtight pressure cylinder 401, and the flow sealing plug 5 includes a second pressure sensor 501 and a flow pressure cylinder 502 connected in series;

[0045] The electric proportional valve 3023 is dynamically adjusted based on the pressure difference between the first pressure sensor 3025 and the second pressure sensor 501.

[0046] In this embodiment, in the airtightness test circuit 301, the precision pressure regulating valve 3011 is used to precisely control the pressure of the test gas, the leak detector 3012 is used to detect the airtightness of the product 2 under test, and the first pneumatic sealing valve 3013 is used to switch the airtightness test state.

[0047] In this embodiment, in the flow test circuit 302, the two-way solenoid valve 3021 is used to open and close the flow detection channel, the precision filter 3022 is used to purify the detection gas, the electro-proportional valve 3023 dynamically adjusts the gas flow rate based on pressure feedback, and the flow meter 3024 is used to measure the gas flow rate value.

[0048] In this embodiment, the airtight plug 4 and the flow plug 5 are connected in parallel; during the airtightness test, the airtightness pressure cylinder 401 seals the outlet; during the flow test, the flow pressure cylinder 502 performs dynamic pressure compensation on the outlet.

[0049] In this embodiment, the pressure difference between the air inlet and outlet of the product under test 2 is monitored in real time by the first pressure sensor 3025 and the second pressure sensor 501, and the opening of the electro-proportional valve 3023 is controlled by the feedback signal to maintain a stable pressure for flow testing.

[0050] In this embodiment, a control circuit (not shown in the figure) is also included, which is used to drive the cylinder of the blocking line to actuate.

[0051] In practice, the working modes of the detection system include at least an airtightness detection mode and a flow detection mode;

[0052] Air tightness test mode: Two-way solenoid valve 3021 is closed, second pneumatic sealing valve 3026 is closed, leak detector 3012 and first pneumatic sealing valve 3013 are open, the test gas is input to the product under test 2 through air tightness test circuit 301, and the outlet is sealed by air tightness pressurizing cylinder 401.

[0053] Flow detection mode: Leak detector 3012 is closed, first pneumatic sealing valve 3013 is closed, two-way solenoid valve 3021, electro-proportional valve 3023, flow meter 3024, first pressure sensor 3025 and second pneumatic sealing valve 3026 are open, detection gas is input to product 2 under test through flow test circuit 302, and the outlet pressure is dynamically adjusted by flow pressure cylinder 502.

[0054] In this embodiment, the pneumatic dual unit 1 includes an air filter and a pressure regulator, used to provide the detection system with clean and pressure-stable detection gas.

[0055] This utility model has a reasonable structure and simple operation. Through the coordinated work of the pneumatic dual unit 1 and the test circuit 3, it realizes automated detection, reduces manual operation steps, and improves testing efficiency.

[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The embodiments described above merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A detection system for sealing and venting valves, characterized in that, include: A pneumatic dual unit (1) is provided with a test circuit (3) connected in the direction of air outlet; The test circuit (3) includes a parallel airtightness test circuit (301) and a flow test circuit (302); The airtightness test circuit (301) is connected in series with a precision pressure regulating valve (3011), a leak detector (3012) and a first pneumatic sealing valve (3013), and is connected to the air inlet of the product under test (2); The flow test circuit (302) is connected in series with a two-way solenoid valve (3021), a precision filter (3022), an electro-proportional valve (3023), a flow meter (3024), a first pressure sensor (3025), and a second pneumatic sealing valve (3026), and is connected to the air inlet of the product under test (2); The outlet of the product under test (2) is connected to a blocking line, which includes an airtight block (4) and a flow blocking line (5). The airtight plug (4) includes an airtight pressure cylinder (401), and the flow plug (5) includes a second pressure sensor (501) and a flow pressure cylinder (502) connected in series. The electric proportional valve (3023) is dynamically adjusted based on the pressure difference between the first pressure sensor (3025) and the second pressure sensor (501).

2. The detection system for a sealed and breathable valve according to claim 1, characterized in that, In the airtightness test circuit (301), the precision pressure regulating valve (3011) is used to precisely control the pressure of the detection gas, the leak detector (3012) is used to detect the airtightness of the product under test (2), and the first pneumatic sealing valve (3013) is used to switch the airtightness test state.

3. The detection system for a sealed and breathable valve according to claim 1, characterized in that, In the flow test circuit (302), the two-way solenoid valve (3021) is used to open and close the flow detection channel, the precision filter (3022) is used to purify the detection gas, the electro-proportional valve (3023) dynamically adjusts the gas flow rate based on pressure feedback, and the flow meter (3024) is used to measure the gas flow rate value.

4. The detection system for a sealed and breathable valve according to claim 1, characterized in that, The airtight plug (4) and the flow plug (5) are connected in parallel; During the airtightness test, the airtightness-pressurizing cylinder (401) seals the air outlet; During flow testing, the flow pressure cylinder (502) performs dynamic pressure compensation at the outlet.

5. The detection system for a sealed and breathable valve according to claim 4, characterized in that, The pressure difference between the inlet and outlet of the product under test (2) is monitored in real time by the first pressure sensor (3025) and the second pressure sensor (501), and the opening of the electric proportional valve (3023) is controlled by the feedback signal to maintain a stable pressure for flow testing.

6. The detection system for a sealed and ventilated valve according to claim 1, characterized in that, It also includes a control circuit for driving the cylinder of the blocked line.

7. The detection system for a sealed and breathable valve according to claim 1, characterized in that, The operating modes of the detection system include at least an airtightness detection mode and a flow rate detection mode.

8. The detection system for a sealed vent valve according to claim 7, characterized in that, In the airtightness testing mode, the two-way solenoid valve (3021) is closed, the second pneumatic sealing valve (3026) is closed, the leak detector (3012) and the first pneumatic sealing valve (3013) are opened, the test gas is input into the product under test (2) through the airtightness test circuit (301), and the outlet is sealed by the airtightness pressurizing cylinder (401).

9. The detection system for a sealed ventilated valve according to claim 7, characterized in that, In the flow detection mode, the leak detector (3012) is closed, the first pneumatic sealing valve (3013) is closed, and the two-way solenoid valve (3021), the electro-proportional valve (3023), the flow meter (3024), the first pressure sensor (3025), and the second pneumatic sealing valve (3026) are opened. The detection gas is input to the product under test (2) through the flow test circuit (302), and the outlet pressure is dynamically adjusted by the flow pressure cylinder (502).

10. The detection system for a sealed ventilated valve according to any one of claims 1 to 9, characterized in that, The pneumatic dual unit (1) includes an air filter and a pressure regulator for providing the detection system with clean and pressure-stable detection gas.

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