CN-224216289-U - 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, wherein the pressure testing unit comprises a gas cylinder and a testing interface which are connected through a testing pipeline, a pressure reducing valve and a pneumatic stop valve are arranged on the testing pipeline, and the low-pressure pneumatic control unit is connected with the pressure reducing valve and the pneumatic stop valve. The utility model provides an air source for air supply through the air bottle, and after the pressure is regulated through the pressure reducing valve, compressed air with certain pressure is introduced into the inner cavity of the unlocking device, 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, the unlocking pressure of the unlocking device is tested, and the pneumatic control mode is used for controlling the pressure of the testing unit and the on-off of a pipeline through the low-pressure air control unit, so that the pneumatic control device can be suitable for a higher pressure range.

Inventors

• HAN SHULIANG
• WAN QIAN
• ZHANG ZHIXIANG
• LI PENGFEI
• LI NANA
• SHI XIAOYANG
• ZHANG XU
• XIE YAKUN
• CHENG XIA
• WU YONGHUI

Assignees

• 河南航天液压气动技术有限公司

Dates

Publication Date

20260508

Application Date

20250523

Claims (10)

1. 1. The pressure testing device for the unlocking device is characterized by comprising a pressure testing unit and a low-pressure pneumatic control unit which are connected, wherein the pressure testing unit comprises a gas cylinder (1) and a testing interface (12) which are connected through a testing pipeline, a pressure reducing valve (8) and a pneumatic stop valve (14) are arranged on the testing pipeline, and the low-pressure pneumatic control unit is connected with the pressure reducing valve (8) and the pneumatic stop valve (14).
2. 2. Pressure testing device for unlocking means according to claim 1, characterized in that the low-pressure pneumatic control unit comprises an air compressor (18) and a valve island (16) connected by means of control lines, the valve island (16) being connected with a pressure reducing valve (8) and a pneumatic shut-off valve (14), respectively.
3. 3. Pressure testing device for unlocking means according to claim 2, characterized in that the control line is further provided with a pneumatic triplet (17), the pneumatic triplet (17) being located between the air compressor (18) and the valve island (16).
4. 4. A pressure testing device for an unlocking device according to claim 3, wherein the air compressor (18), the valve island (16) and the pressure reducing valve (8) are all connected with an upper computer.
5. 5. The pressure testing device for an unlocking device according to any one of claims 1 to 4, wherein a filter (3) is arranged on the testing pipeline, and a check valve (2) is arranged at a position between the gas cylinder (1) and the filter (3) on the testing pipeline.
6. 6. The pressure testing device for the unlocking device according to claim 5, wherein the testing pipeline is further provided with a digital display pressure gauge I (5), a safety valve I (6) and a stop valve I (7) in sequence, the outlet end of the filter (3) is connected to the inlet end of the digital display pressure gauge I (5), the outlet end of the stop valve I (7) is connected to the inlet end of the pressure reducing valve (8), and the testing pipeline is further provided with a pressure sensor (9) positioned at the downstream of the pressure reducing valve (8).
7. 7. The pressure testing device for the unlocking device according to claim 6, wherein the first pressure relief pipeline is connected with the second pressure relief pipeline, the second pressure relief pipeline is provided with the stop valve IV (4), and the connection part of the second pressure relief pipeline and the first pressure relief pipeline is positioned between the filter (3) and the digital display pressure gauge IV (5).
8. 8. The pressure testing device for the unlocking device according to any one of claims 1-4, 6 and 7, wherein a manual control pipeline is connected in parallel to the testing pipeline, the connection parts of the two ends of the manual control pipeline and the testing pipeline are respectively positioned at the two ends of the pneumatic stop valve (14) so that the manual control pipeline is connected in parallel with the pneumatic stop valve (14), and the manual control pipeline is provided with a stop valve II (10).
9. 9. The pressure testing device for the unlocking device according to claim 8, wherein the manual control pipeline is connected with a second pressure relief pipeline, and the second pressure relief pipeline is provided with a third stop valve (11).
10. 10. The pressure testing device for the unlocking device according to claim 9, wherein two ends of the manual control pipeline are provided with a second safety valve (15) and a second digital display pressure gauge (13).

Description

Pressure testing device for unlocking device Technical Field The utility model relates to the technical field of pneumatic control, in particular to a pressure testing device. Background The pressure test is one of the common tightness test methods and is also a very important quality control means. The pressure test is widely applied to various hydro-pneumatic components and hydro-pneumatic systems, plays a role in safety protection, and ensures the safe use of the components. By applying certain air pressure to the test object and then adopting a corresponding test method to monitor whether the pressure is reduced or not to judge whether leakage occurs or not, the performance and the safety of the product can be ensured. The unlocking device is a pneumatic element, and the tightness of the unlocking device is the main performance of the unlocking device. With the development of industry, especially the rapid development of aerospace technology, the requirements for various hydro-pneumatic components are increasing. And therefore there is also a greater need for testing hydro-pneumatic components. At present, the domestic pressure testing device mainly adopts manual operation, so that the efficiency of pressure testing is low, and certain potential safety hazards exist in manual operation of high-pressure gas. The utility model discloses a check valve opening pressure testing device which comprises an air compressor, wherein a high-pressure air storage tank, a regulating valve, a low-pressure air storage tank and a tested valve are sequentially connected through pipelines after the air compressor, a pressure gauge and a safety valve are arranged on the high-pressure air storage tank and the low-pressure air storage tank, and a pressure sensor is arranged between the low-pressure air storage tank and the tested valve. The patent obtains the opening pressure of the check valve by observing the value of the pressure sensor. However, the control mode of the patent adopts manual control, is suitable for low-pressure gas, and has certain potential safety hazard if the control mode is used for high-pressure gas. Disclosure of Invention The utility model provides a pressure testing device for an unlocking device, which is used for solving the problems that the pressure testing device for a pneumatic element in the prior art adopts manual control, is applicable to low-pressure gas and has certain potential safety hazard if used for high-pressure gas. In order to achieve the above purpose, the technical scheme of the utility model is realized as follows: The pressure testing device for the unlocking device comprises a pressure testing unit and a low-pressure pneumatic control unit which are connected, wherein the pressure testing unit comprises a gas cylinder and a testing interface which are connected through a testing pipeline, a pressure reducing valve and a pneumatic stop valve are arranged on the testing pipeline, and the low-pressure pneumatic control unit is connected with the pressure reducing valve and the pneumatic stop valve. Further, in order to supply air to the low-pressure air control unit and simultaneously control a plurality of valves, the low-pressure air control unit comprises an air compressor and a valve island which are connected through control pipelines, and the valve island is respectively connected with a pressure reducing valve and a pneumatic stop valve. Further, the control pipeline is also provided with a pneumatic triple piece, and the pneumatic triple piece is positioned between the air compressor and the valve island. Further, in order to facilitate automatic control of the low-pressure air control unit, the air compressor, the valve island and the pressure reducing valve are all connected with an upper computer. Further, a filter is arranged on the test pipeline, and a check valve is arranged at a position between the gas cylinder and the filter on the test pipeline. Further, a digital display pressure gauge I, a safety valve I and a stop valve I are sequentially arranged on the test pipeline, the outlet end of the filter is connected to the inlet end of the digital display pressure gauge I, the outlet end of the stop valve I is connected to the inlet end of the pressure reducing valve, and a pressure sensor is further arranged on the test pipeline and positioned at the downstream of the pressure reducing valve. Further, a first pressure relief pipeline is connected to the test pipeline, a fourth stop valve is arranged on the first pressure relief pipeline, and the joint of the first pressure relief pipeline and the test pipeline is located between the filter and the first digital display pressure gauge. Further, in order to realize manual control when the low-pressure pneumatic control unit fails, the test pipeline is connected with a manual control pipeline in parallel, the connection parts of the two ends of the manual control pipeline and the test pipeline are respectively posi