Pressure testing device for unlocking device

Abstract

The utility model provides a pressure testing device for an unlocking device, which comprises a pressure testing unit and a low-pressure pneumatic control unit which are connected with each other, the pressure testing unit comprises a gas cylinder and a testing interface which are connected through a testing pipeline, and the testing pipeline is provided with a pressure reducing valve and a pneumatic stop valve. And the low-pressure pneumatic control unit is connected with the pressure reducing valve and the pneumatic stop valve. According to the utility model, an air source is supplied through the air cylinder, compressed air with a certain pressure is introduced into the inner cavity of the unlocking device after the pressure is regulated through the pressure reducing valve, and the introduced pressure is gradually regulated until the unlocking device is unlocked, so that the change of pressure data in the whole process is conveniently recorded, and the unlocking pressure of the unlocking device is tested; according to the utility model, a pneumatic control mode is adopted, the low-pressure pneumatic control unit is used for controlling the pressure of the test unit and the on-off of the pipeline, and the device can be applied to a higher pressure range.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic control technology, and in particular to a pressure testing device. Background Technology

[0002] Pressure testing is a common method for testing leak tightness and a crucial quality control tool. It is widely used in various hydraulic and pneumatic components and systems, serving a safety protection function and ensuring the safe operation of components. By applying a certain air pressure to the test object and then using appropriate testing methods to monitor whether the pressure drops, leaks can be detected, thereby ensuring product performance and safety.

[0003] Unlocking devices are pneumatic components, and their sealing performance is a primary characteristic. With industrial development, especially the rapid advancement of aerospace technology, the demand for various hydraulic and pneumatic components is increasing. Consequently, the testing requirements for these components are also growing. Currently, most pressure testing equipment in China is manually operated, which leads to low testing efficiency and poses certain safety hazards due to the manual handling of high-pressure gas.

[0004] Chinese utility model patent CN204008098, published on December 10, 2014, discloses a check valve opening pressure testing device. The device includes an air compressor, which is connected sequentially via pipeline to a high-pressure air tank, a regulating valve, a low-pressure air tank, and the valve under test. Pressure gauges and safety valves are installed on the high-pressure and low-pressure air tanks, and a pressure sensor is installed between the low-pressure air tank and the valve under test. This patent allows the check valve's opening pressure to be determined by observing the pressure sensor readings. However, the control method is manual and suitable for low-pressure gases; its application to high-pressure gases poses certain safety hazards. Summary of the Invention

[0005] To address the aforementioned technical problems, this utility model proposes a pressure testing device for unlocking devices, which solves the problem that existing pressure testing devices for pneumatic components are manually controlled and suitable for low-pressure gases, but pose certain safety hazards when used for high-pressure gases.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] A pressure testing device for unlocking a device includes a pressure testing unit and a low-pressure pneumatic control unit connected to each other. The pressure testing unit includes a gas cylinder and a test interface connected through a test pipeline. The test pipeline is equipped with a pressure reducing valve and a pneumatic shut-off valve. The low-pressure pneumatic control unit is connected to the pressure reducing valve and the pneumatic shut-off valve.

[0008] Furthermore, in order to supply air to the low-pressure pneumatic control unit and to control multiple valves simultaneously, the low-pressure pneumatic control unit includes an air compressor and a valve island connected by a control pipeline. The valve island is connected to a pressure reducing valve and a pneumatic shut-off valve, respectively.

[0009] Furthermore, the control pipeline is also equipped with a pneumatic triplet, which is located between the air compressor and the valve island.

[0010] Furthermore, to facilitate automatic control of the low-pressure air control unit, the air compressor, valve island, and pressure reducing valve are all connected to the host computer.

[0011] Furthermore, the test pipeline is equipped with a filter, and a check valve is installed on the test pipeline at the position between the gas cylinder and the filter.

[0012] Furthermore, the test pipeline is also equipped with a digital pressure gauge, a safety valve, and a shut-off valve in sequence. The outlet end of the filter is connected to the inlet end of the digital pressure gauge; the outlet end of the shut-off valve is connected to the inlet end of the pressure reducing valve; and a pressure sensor is also provided on the test pipeline downstream of the pressure reducing valve.

[0013] Furthermore, a pressure relief line is connected to the test pipeline, and a shut-off valve is installed on the pressure relief line. The connection between the pressure relief line and the test pipeline is located between the filter and the digital pressure gauge.

[0014] Furthermore, in order to enable manual control in the event of a failure of the low-pressure pneumatic control unit, a manual control pipeline is connected in parallel to the test pipeline. The connection points of the two ends of the manual control pipeline and the test pipeline are respectively located at the two ends of the pneumatic shut-off valve, so that the manual control pipeline and the pneumatic shut-off valve are connected in parallel; a second shut-off valve is provided on the manual control pipeline.

[0015] Furthermore, to facilitate safe pressure relief, a second pressure relief pipeline is connected to the manual control pipeline, and a third shut-off valve is installed on the second pressure relief pipeline.

[0016] Furthermore, to facilitate the operation of the manual control pipeline, a second safety valve and a second digital pressure gauge are provided at both ends of the manual control pipeline.

[0017] The beneficial effects of this utility model are:

[0018] 1. This utility model provides air supply through a high-pressure gas cylinder. After the pressure is adjusted by the pressure reducing valve, compressed air of a certain pressure is introduced into the inner cavity of the unlocking device. The pressure is gradually adjusted until the unlocking device unlocks. The data acquisition system can record the changes in pressure data throughout the process, thereby testing the unlocking pressure of the unlocking device.

[0019] 2. The pressure testing device of this utility model adopts a pneumatic control method. A low-pressure pneumatic control unit is used to control the pressure of the testing unit and the on / off of the pipeline, which can be applied to a higher pressure testing range.

[0020] 3. The air compressor, valve island, and pressure reducing valve of this utility model are all connected to the host computer to form an automatic air control, which makes the pressure test accuracy high;

[0021] 4. A check valve is installed in the pipeline of the pressure testing unit of this utility model to prevent gas backflow;

[0022] 5. This utility model can effectively filter particulate matter and impurities in the gas through the filter, preventing them from entering the pressure reducing valve, thereby protecting the pressure reducing valve, extending its service life, and ensuring the stable operation of the pressure reducing valve. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] In the diagram: 1. Gas cylinder, 2. Check valve, 3. Filter, 4. Shut-off valve four, 5. Digital pressure gauge one, 6. Safety valve one, 7. Shut-off valve one, 8. Pressure reducing valve, 9. Pressure sensor, 10. Shut-off valve two, 11. Shut-off valve three, 12. Test interface, 13. Digital pressure gauge two, 14. Pneumatic shut-off valve, 15. Safety valve two, 16. Valve island, 17. Air compressor triple unit, 18. Air compressor. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1As shown in Embodiment 1 of this utility model, a pressure testing device for an unlocking device includes a pressure testing unit and a low-pressure pneumatic control unit connected together. The pressure testing unit includes a gas cylinder 1 and a test interface 12, which are connected via a test pipeline. The test interface 12 is used to connect the unlocking device, which is a pneumatic component. A pressure reducing valve 8 and a pneumatic shut-off valve 14 are provided on the test pipeline. The gas cylinder 1 supplies gas to the unlocking device during the unlocking process. After the pressure is adjusted by the pressure reducing valve 8, compressed air at a certain pressure is introduced into the inner cavity of the unlocking device. The pressure is gradually adjusted until the unlocking device unlocks, facilitating the collection and recording of pressure data changes throughout the process, thereby forming pressure test data for the unlocking device. The low-pressure pneumatic control unit is connected to the pressure reducing valve 8 to provide driving gas to the pressure reducing valve 8, enabling the pressure reducing valve 8 to control the outlet pressure of the test interface 12. The low-pressure pneumatic control unit is also connected to the pneumatic shut-off valve 14 to provide driving gas to the pneumatic shut-off valve 14, thereby controlling the opening and closing of the test pipeline.

[0028] Furthermore, the low-pressure pneumatic control unit includes an air compressor 1 and a valve island 16, which are connected via control pipelines. The air compressor 1 serves as a gas source, supplying low-pressure gas to the control process. In this embodiment, the air compressor 1 outputs compressed gas at 0.4–0.8 MPa. The valve island 16 is connected to a pressure reducing valve 8 and a pneumatic shut-off valve 14, respectively, allowing the air compressor 1 to supply driving gas to both valves via the valve island 16.

[0029] Furthermore, a pneumatic triplet 17 is also provided on the control pipeline, located between the air compressor 1 and the valve island 16. The pneumatic triplet, through precise combination and coordinated operation, achieves purification, filtration, and pressure reduction of the air source. Both the valve island 16 and the pneumatic triplet adopt structures found in existing technologies.

[0030] Example 2 differs from Example 1 in that, as Figure 1 As shown, the air compressor 1, valve island 16, and pressure reducing valve 8 are all connected to a host computer. The host computer controls the opening and closing of the air compressor 1, valve island 16, and pressure reducing valve 8 to control the pressure of the pressure testing unit, forming an automatically controlled low-pressure air control unit, thereby achieving precise regulation of the pressure testing unit. Simultaneously, the host computer can also record data, generating performance test data for the unlocking device.

[0031] Example 3 differs from Example 2 in that, as Figure 1 As shown, a filter 3 is installed on the test pipeline, and a check valve 2 is installed on the test pipeline between the gas cylinder 1 and the filter 3. That is, the gas cylinder 1, the check valve 2, and the filter 3 are connected in series through the test pipeline. The check valve in the test pipeline prevents gas backflow.

[0032] Furthermore, such as Figure 1As shown, the test pipeline is also sequentially equipped with a digital pressure gauge 5, a safety valve 6, and a shut-off valve 7. The outlet end of the filter 3 is connected to the inlet end of the digital pressure gauge 5, meaning the digital pressure gauge 5 is located downstream of the filter 3. The digital pressure gauge 5, safety valve 6, and shut-off valve 7 are sequentially arranged on the test pipeline. The outlet end of the shut-off valve 7 is connected to the inlet end of the pressure reducing valve 8, meaning the pressure reducing valve 8 is located downstream of the shut-off valve 7. A pressure sensor 9 is also located downstream of the pressure reducing valve 8 on the test pipeline. The pneumatic shut-off valve 14 is located downstream of the pressure sensor 9, and the test interface 12 is located downstream of the pneumatic shut-off valve 14. In this embodiment, the pressure range of the digital pressure gauge 5 is 0~25MPa, and the current is 4~20mA; the pressure range of the pressure sensor 9 is 0~16MPa, and the current is 4~20mA; the output pressure range of the test interface 12 is 0~10MPa.

[0033] Example 4 differs from Example 3 in that, as Figure 1 As shown, a pressure relief line is connected to the test pipeline, and a shut-off valve 4 is installed on the pressure relief line. The connection between the pressure relief line and the test pipeline is located between the filter 3 and the digital pressure gauge 5. The shut-off valve 4 is normally closed when the equipment is working normally, and it is only opened after the test is completed.

[0034] Example 5 differs from Example 3 in that, as Figure 1 As shown, a manual control line is connected in parallel to the test line. The two ends of the manual control line are connected to the test line at the two ends of the pneumatic shut-off valve 14, thus connecting the manual control line and the pneumatic shut-off valve 14 in parallel. A shut-off valve 10 is provided on the manual control line. Furthermore, a safety valve 15 and a digital pressure gauge 13 are provided at both ends of the manual control line to display the pressure and ensure its safety. In this embodiment, the pressure range of the digital pressure gauge 13 is 0~16MPa, and the current is 4~20mA.

[0035] Furthermore, such as Figure 1 As shown, a second pressure relief line is connected to the manual control line, and a third shut-off valve 11 is installed on the second pressure relief line. The third shut-off valve 11 is normally closed when the manual control line is working normally, and it is only opened after the test is completed.

[0036] Example 6: The working principle of each component of this utility model is as follows:

[0037] 1) Gas source access and control: 15MPa high-pressure gas cylinder 1 is directly connected to the gas distribution platform via a hose. The host computer controls the air compressor to provide low-pressure gas with a pressure range of 0.4 to 0.8MPa. This low-pressure gas is mainly used to open and close the pressure reducing valve 8 and the pneumatic shut-off valve 10, thereby achieving precise control of the high-pressure gas.

[0038] 2) Gas source filtration: After gas cylinder 1 is connected, the gas first flows through filter 3. Filter 3 can effectively filter particulate matter and impurities in the gas, preventing them from entering the pressure reducing valve, thereby protecting the pressure reducing valve 8, extending its service life, and ensuring the stable operation of the pressure reducing valve 8.

[0039] 3) Pressure Setting and Output: The output pressure can be set within the range of 0-10MPa via the host computer according to actual needs, i.e., the output pressure of test interface 12 is set. After receiving the command, the pressure reducing valve 8 automatically adjusts to reduce the high-pressure gas to the set pressure and outputs it.

[0040] 4) Automatic mode workflow: In daily operation, the automatic mode is selected. The low-pressure gas provided by the air compressor 18 is automatically controlled by the valve island to open the pneumatic shut-off valve 14, and the high-pressure gas is output to the unlocking device through the pneumatic shut-off valve 14 to realize automated gas supply.

[0041] 5) Manual Mode Workflow: Manual mode is a backup, used in case of automatic mode failure or special circumstances such as low-pressure pneumatic control unit failure. The operator manually opens shut-off valve 2 (10), allowing high-pressure gas to be output to the device under test. When the manual mode function is not used, shut-off valve 2 (10) must remain closed to ensure system safety.

[0042] 6) Operating status of the gate valves: Gate valve 7 is normally open during equipment operation and requires no manual operation; it is only closed after all tests are completed. Gate valves 11 and 4 are normally closed during normal equipment operation. They are only opened for pressure relief when pressure needs to be released.

[0043] 7) Test completion procedure: After the test is completed, first open the shut-off valve 311 and shut-off valve 4 to release the gas in the pipeline. After the gas in the pipeline is emptied, then disassemble the unlocking device to avoid safety hazards.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions of some or all of the technical features thereof, within the spirit and principles of the present invention, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A pressure testing device for unlocking a device, characterized in that, It includes a pressure testing unit and a low-pressure air control unit connected to each other. The pressure testing unit includes a gas cylinder (1) and a test interface (12) connected through a test pipeline. The test pipeline is equipped with a pressure reducing valve (8) and a pneumatic shut-off valve (14). The low-pressure air control unit is connected to the pressure reducing valve (8) and the pneumatic shut-off valve (14).

2. The pressure testing device for unlocking a device according to claim 1, characterized in that, The low-pressure pneumatic control unit includes an air compressor (18) and a valve island (16) connected by a control pipeline. The valve island (16) is connected to a pressure reducing valve (8) and a pneumatic shut-off valve (14) respectively.

3. The pressure testing device for unlocking the device according to claim 2, characterized in that, The control pipeline is also equipped with a pneumatic triplet (17), which is located between the air compressor (18) and the valve island (16).

4. The pressure testing device for unlocking a device according to claim 3, characterized in that, The air compressor (18), valve island (16) and pressure reducing valve (8) are all connected to the host computer.

5. The pressure testing device for unlocking a device according to any one of claims 1 to 4, characterized in that, The test pipeline is equipped with a filter (3), and a check valve (2) is provided on the test pipeline between the gas cylinder (1) and the filter (3).

6. The pressure testing device for unlocking a device according to claim 5, characterized in that, The test pipeline is also provided with a digital pressure gauge (5), a safety valve (6) and a shut-off valve (7) in sequence. The outlet end of the filter (3) is connected to the inlet end of the digital pressure gauge (5); the outlet end of the shut-off valve (7) is connected to the inlet end of the pressure reducing valve (8); and a pressure sensor (9) is also provided on the test pipeline downstream of the pressure reducing valve (8).

7. The pressure testing device for unlocking a device according to claim 6, characterized in that, The test pipeline is connected to a pressure relief pipeline, and a shut-off valve (4) is provided on the pressure relief pipeline. The connection between the pressure relief pipeline and the test pipeline is located between the filter (3) and the digital pressure gauge (5).

8. The pressure testing device for unlocking a device according to any one of claims 1 to 4, 6 and 7, characterized in that, A manual control pipeline is connected in parallel to the test pipeline. The two ends of the manual control pipeline are connected to the test pipeline at the two ends of the pneumatic shut-off valve (14), so that the manual control pipeline and the pneumatic shut-off valve (14) are connected in parallel. A shut-off valve (10) is provided on the manual control pipeline.

9. The pressure testing device for unlocking a device according to claim 8, characterized in that, The manual control pipeline is connected to a pressure relief pipeline two, and a shut-off valve three (11) is installed on the pressure relief pipeline two.

10. The pressure testing device for unlocking a device according to claim 9, characterized in that, Safety valve 2 (15) and digital pressure gauge 2 (13) are provided at both ends of the manual control pipeline.

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