Pressure reducer high-pressure airtightness detection tool

Abstract

The utility model provides a pressure reducer high-pressure airtightness detection tool, and relates to the technical field of equipment detection. The air tightness detection tool comprises an air tightness detection tool body, a high-pressure air path, a low-pressure air path, an air tightness detection water tank and a to-be-detected piece lifting platform. Wherein the tool body is composed of an upper portion, a middle operation window and a lower portion, the high-pressure gas circuit is located on the upper portion, the water tank is located on the lower portion, the low-pressure gas circuit is located on the lower portion, and the operation window is connected with the upper portion and the lower portion through a frame structure; the to-be-tested piece lifting platform is arranged in the water tank and comprises a lifting cylinder, a lifting base and an operation platform; the high-pressure gas circuit comprises a compressor, a multi-path high-pressure electromagnetic valve and a high-pressure connector; the tool can detect the air tightness of a plurality of pieces to be detected at the same time, is simple and convenient to operate, and is suitable for mass production. The tool electric control unit controls the whole detection tool to work and is provided with a key panel, an instrument panel and a detection recording panel, so that operation control and data monitoring are facilitated; the tool achieves a good effect in actual production, and the detection efficiency and safety are improved.

Description

Technical Field

[0001] This utility model relates to the field of equipment testing technology, and in particular to a pressure reducer high-pressure airtightness testing fixture. Background Technology

[0002] Automotive compressed natural gas pressure regulators are required to have strict airtightness. Automotive compressed natural gas pressure regulators must undergo 100% airtightness testing before leaving the factory. The testing method is to immerse the sample in water at a depth of 100mm-300mm, with an inlet pressure of 30MPa, and observe for at least 1 minute to check for the appearance of air bubbles.

[0003] The testing process requires 30 MPa high-pressure air. The air tightness test of traditional gas pressure regulators does not take into account protective measures, which poses certain safety risks. In addition, it requires manual inflation and deflation of each test piece, which is inefficient and cumbersome.

[0004] Therefore, there is an urgent need for a pressure reducer high-pressure airtightness testing tool to solve the technical problems of low efficiency, cumbersome operation procedures and certain safety risks. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pressure reducer high-pressure airtightness testing fixture, which aims to achieve batch airtightness testing and improve the testing efficiency and safety of airtightness testing.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] On the one hand, this utility model provides a high-pressure airtightness testing fixture for a pressure reducer, including an airtightness testing fixture body, a high-pressure air circuit, a low-pressure air circuit, an airtightness testing water tank, and a lifting platform for the part under test; wherein,

[0008] The airtightness testing fixture body includes an upper body, a middle operating window, and a lower body; wherein, the high-pressure air circuit is located in the upper body, the low-pressure air circuit is located in the lower body, the airtightness testing water tank is located in the lower body, and the middle operating window is connected to the upper body and the lower body by a support frame.

[0009] The test piece lifting platform is placed in an airtightness testing water tank and includes a first lifting cylinder, a second lifting cylinder, a lifting base, and a central operating platform; the lifting base includes a left leaf, a right leaf, and a central base plate; the first lifting cylinder and the second lifting cylinder are respectively located at the bottom of the left leaf and the right leaf and are fixedly connected.

[0010] The middle base plate is concave and has a plurality of flow holes on the bottom surface, and the two ends are fixedly connected with the left and right leaves respectively; the middle operation platform is arranged between the grooves formed by the middle base plate, and a plurality of DUT operation tables are arranged on the middle operation platform;

[0011] The high-pressure gas circuit includes a compressor, a plurality of high-pressure electromagnetic valves, and a plurality of high-pressure connectors corresponding to the DUT operation tables; the compressor is connected with the plurality of high-pressure electromagnetic valves through gas pipes, the plurality of high-pressure electromagnetic valves are connected with the high-pressure connectors through gas pipes; a hole is formed in the bottom surface of the upper part of the body, the high-pressure connectors pass through the hole and are arranged in the middle operation window, and the high-pressure connectors are connected with the DUTs.

[0012] The low-pressure gas circuit includes a five-port two-position electromagnetic valve, a first lifting cylinder, a second lifting cylinder, an upper three-way pipe, and a lower three-way pipe; the first lifting cylinder and the second lifting cylinder are connected with the five-port two-position electromagnetic valve through gas pipes, the upper three-way pipe, and the lower three-way pipe.

[0013] The middle operation window is filled with a frame structure of explosion-proof glass; the front of the frame structure is provided with a movable glass window, and the other sides are provided with fixed glass windows; the movable glass window is closed and confirmed by a gas supply emergency stop switch.

[0014] As a further solution, the high-pressure gas circuit further has a gas storage bottle, an electromagnetic valve S1, and an electric control pressure reducing valve between the compressor and the plurality of high-pressure electromagnetic valves; a pressure sensor P1 is further arranged between the electromagnetic valve S1 and the electric control pressure reducing valve, and a pressure sensor P2 is further arranged between the electric control pressure reducing valve and the plurality of high-pressure electromagnetic valves.

[0015] As a further solution, the plurality of high-pressure electromagnetic valves are further provided with an electric control exhaust valve, and an exhaust silencer is further arranged at the outlet of the electric control exhaust valve.

[0016] As a further solution, a tool electric control unit is further provided; the tool electric control unit includes a DC power supply, a power relay, a plurality of high-pressure electromagnetic valves, a time relay, and a five-port two-position electromagnetic valve.

[0017] The DC power supply is externally connected to AC power, and a power switch and a general emergency stop switch are respectively arranged on the live wire. The DC power supply leads out a positive pole, a second positive pole and a negative pole. The positive pole end of the power relay is electrically connected to the second positive pole through a test switch. The negative pole end of the power relay is electrically connected to the negative pole. One end of the normally open electrical contact of the power relay is electrically connected to the first positive pole through a gas supply emergency stop switch. The other end of the normally open electrical contact of the power relay is electrically connected to the positive pole of the multi-way high-pressure electromagnetic valve, the electromagnetic valve S1, the electrically controlled pressure reducing valve and the buzzer respectively. The negative poles of the multi-way high-pressure electromagnetic valve, the electromagnetic valve S1, the electrically controlled pressure reducing valve and the buzzer are electrically connected to the negative pole of the power supply. The normally closed electrical contact of the power relay is electrically connected to the positive pole of the electrically controlled exhaust valve. The negative pole end of the electrically controlled exhaust valve is electrically connected to the negative pole.

[0018] The positive pole end of the time relay is electrically connected to the second positive pole through a test switch. The negative pole end of the time relay is electrically connected to the negative pole. One end of the normally open electrical contact of the time relay is electrically connected to the second positive pole. The other end of the normally open electrical contact of the time relay is electrically connected to the positive pole end of the five-port two-position electromagnetic valve. The negative pole of the five-port two-position electromagnetic valve is electrically connected to the negative pole end of the power supply. The normally open electrical contact of the time relay is turned on after being powered on, and is automatically turned off after a delay time.

[0019] As a further solution, the upper part of the body is provided with a key panel, an instrument panel and a detection recording panel. The key panel is provided with a start key corresponding to the power switch, a general emergency stop key corresponding to the general emergency stop switch and a test key corresponding to the test switch. The instrument panel is provided with a pressure gauge. The detection recording panel is provided with a record book.

[0020] As a further solution, the gas supply emergency stop switch is arranged on the movable glass window. The corresponding gas supply emergency stop switch is turned on when the movable glass window is closed, and is turned off when the movable glass window is opened.

[0021] As a further solution, lighting lamps are arranged in the operation windows of the upper part and the middle part of the body respectively. One end of the lighting lamp is connected between the power switch and the general emergency stop switch, and the other end is connected to the zero line.

[0022] As a further solution, the five-port two-position electromagnetic valve is provided with a first air vent and a second air vent. The first air vent is communicated with one end of the lower three-way pipe through an air pipe. The second air vent is communicated with one end of the upper three-way pipe through an air pipe. The other two ends of the upper three-way pipe are respectively communicated with the upper air cylinder ports of the first lifting cylinder and the second lifting cylinder. The other two ends of the lower three-way pipe are respectively communicated with the lower air cylinder ports of the first lifting cylinder and the second lifting cylinder.

[0023] Compared with the related art, the pressure reducer high-pressure air tightness detection tool has the following advantages:

[0024] The utility model discloses a kind of pressure reducer high-pressure air tightness detection tool, including air tightness detection tool body, high-pressure gas circuit, low-pressure gas circuit, air tightness detection water tank and measured piece lifting platform;Among them, tool body is made of upper portion, middle portion operation window and lower portion, high-pressure gas circuit is located in upper portion, water tank, low-pressure gas circuit, located in lower portion, and operation window is connected upper and lower portion by frame structure.

[0025] High-pressure gas circuit includes compressor, multiway high-pressure solenoid valve and high-pressure connector, is connected by gas pipe, and is placed in operation window from the hole of upper portion of body, and high-pressure gas circuit is responsible for providing high-pressure detection gas source for the detected piece and emptying detection gas after timing.Low-pressure gas circuit includes five-port two-position solenoid valve, first lifting cylinder, second lifting cylinder, upper tee, lower tee, and low-pressure gas circuit is responsible for sinking measured piece into water tank or lifting from water tank.The tool can simultaneously detect the air tightness of multiple measured pieces, is easy to operate, and is suitable for mass production.

[0026] The safety of the tool is ensured by using explosion-proof movable glass window and gas supply emergency stop switch in the operation window, ensuring that the explosion-proof glass window is in a closed state during high-pressure detection and not harming the operator in case of overpressure explosion. During the air tightness detection process, the components such as gas cylinder, solenoid valve, electric control pressure reducing valve and pressure sensor ensure the stability and controllability of the inflation process. The tool electric control unit controls the work of the entire detection tool, and is provided with a key panel, an instrument panel and a detection record panel, which facilitates operation control and data monitoring. In addition, the tool is also provided with a lighting lamp and a five-port two-position solenoid valve, which ensures the lighting demand of the operation process and the accurate control of the cylinder lifting. The tool has achieved good results in actual production, improving the detection efficiency and safety. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The utility model provides a kind of pressure reducer high-pressure air tightness detection tool overall structure schematic view;

[0028] Figure 2 The utility model provides a kind of pressure reducer high-pressure air tightness detection tool local structure schematic view;

[0029] Figure 3 The utility model provides measured piece lifting platform structure schematic view;

[0030] Figure 4 The utility model provides lifting base structure schematic view;

[0031] Figure 5 The utility model provides high-pressure gas circuit structure schematic view;

[0032] Figure 6 The utility model provides a tooling electronic control unit structure schematic diagram;

[0033] Figure 7 The utility model provides a low pressure gas path structure schematic diagram;

[0034] Among them, the sign of the figure: 1, the upper part of the body, 11, the hole, 2, the middle operation window body, 21, the movable glass window, 22, the gas emergency stop switch, 3, the lower part of the body, 31, the air tightness detection water tank, 4, the measured piece lifting platform, 41, the first lifting cylinder, 42, the second lifting cylinder, 43, the left side leaf, 44, the right side leaf, 45, the middle base plate, 46, the middle operation platform frame, 47, the measured piece operation table, 5, the illuminating lamp. Specific implementation

[0035] In order to make the utility model embodiment's purpose, technical scheme and advantage more clearly, below with the figure in the utility model embodiment, to the technical scheme in the utility model embodiment, clear, complete is described, obviously, the described embodiment is the utility model a part embodiment, instead of all the embodiment.The component of the utility model embodiment described and shown in the drawing here can be arranged and designed in various different configurations.

[0036] Please refer to Figure 1 And Figure 3 The utility model provides a pressure reducer high pressure air tightness detection tool, including air tightness detection tool body, high pressure gas path, low pressure gas path, air tightness detection water tank 31 and measured piece lifting platform 4, wherein,

[0037] Air tightness detection tool body includes the upper part of the body 1, the middle operation window body 2 and the lower part of the body 3, wherein, high pressure gas path is placed in the upper part of the body 1, low pressure gas path is placed in the lower part of the body 3, air tightness detection water tank 31 is arranged in the lower part of the body 3, the middle operation window body 2 is connected between the upper part of the body 1 and the lower part of the body 3 through the support frame and forms the frame structure,

[0038] As Figure 3 And Figure 4 The measured piece lifting platform 4 is placed in the air tightness detection water tank 31, including the first lifting cylinder 41, the second lifting cylinder 42, the lifting base and the middle operation platform, the lifting base includes the left side leaf 43, the right side leaf 44 and the middle base plate 45, the first lifting cylinder 41 and the second lifting cylinder 42 are respectively arranged at the bottom of the left side leaf 43 and the right side leaf 44 and are fixedly connected,

[0039] As Figure 4As shown in the drawings, the middle base plate 45 is concave and has a plurality of flow holes on the bottom surface, and the two ends are fixedly connected with the left blade 43 and the right blade 44 respectively; the middle operation platform frame 46 is arranged between the recesses formed by the middle base plate 45, and a plurality of operation tables 47 for the measured members are arranged on the upper side of the middle operation platform frame 46.

[0040] As shown in the drawings, Figure 2 and Figure 5 The high-pressure gas circuit includes a compressor, a plurality of high-pressure electromagnetic valves, and a plurality of high-pressure connectors corresponding to the operation tables 47 for the measured members; the compressor is connected with the plurality of high-pressure electromagnetic valves through gas pipes, and the plurality of high-pressure electromagnetic valves are connected with the high-pressure connectors through gas pipes; the bottom surface of the upper part 1 of the body is provided with a hole 11, the high-pressure connectors pass through the hole 11 and are arranged in the middle operation window 2, and the high-pressure connectors are connected with the measured members.

[0041] As shown in the drawings, Figure 7 The low-pressure gas circuit includes a five-port two-position electromagnetic valve, a first lifting cylinder 41, a second lifting cylinder 42, an upper three-way pipe, and a lower three-way pipe; the first lifting cylinder 41 and the second lifting cylinder 42 are connected with the five-port two-position electromagnetic valve through gas pipes, the upper three-way pipe, and the lower three-way pipe.

[0042] As shown in the drawings, Figure 6As shown, the high-pressure air tightness detection tool for pressure reducer provided by the embodiment can simultaneously detect the air tightness of multiple pieces to be detected, is particularly suitable for mass production of gas pressure reducers, and has achieved excellent results in organized production. During work, the water tank 31 is first filled with water, then the compressor is started to provide a high-pressure gas source and a low-pressure gas source for the low-pressure gas path. At this time, the test switch is not connected, the time relay is not powered on, and the five-port two-position electromagnetic valve is not powered on. The five-port two-position electromagnetic valve supplies low-pressure compressed air to the lower part of the first lifting cylinder 41 and the second lifting cylinder 42 through the lower three-way valve, lifts the lifting base, and after lifting to the position, places the piece to be detected on the middle operation platform, and connects the high-pressure connector corresponding to the middle operation platform to the piece to be detected. Close the movable glass window, at this time the gas emergency stop switch is connected. Press the test switch to power the power relay and the time relay. The time relay connects the normally open contact and starts timing. The five-port two-position electromagnetic valve is powered on and reversed to supply low-pressure compressed air to the upper part of the first lifting cylinder 41 and the second lifting cylinder 42, thereby driving the lifting base to descend, and the piece to be detected is immersed in the air tightness detection water tank 31. At the same time, the power relay connects the normally open contact to power the electromagnetic valve S1, the electric control pressure reducing valve, the multi-way high-pressure electromagnetic valve, and the buzzer, and to provide high-pressure compressed air to the piece to be detected, and to observe whether the piece to be detected has air tightness problems such as bubbles. After the time relay reaches the time, the five-port two-position electromagnetic valve is powered off and reversed, and the first lifting cylinder 41 and the second lifting cylinder 42 are supplied with low-pressure gas through the low-pressure gas path to lift the lifting base. After lifting to the position, turn off the test switch, connect the normally closed contact of the power relay, power on the electric control exhaust valve, and exclude the high-pressure compressed air in the piece to be detected. Open the movable glass window, at this time the gas emergency stop switch is disconnected (double insurance), take out the current piece to be detected and put in the next batch of pieces to be detected, repeat the above operation to complete the batch rapid detection of the piece to be detected.

[0043] Further, in order to ensure the safety of the operator during the entire inflation process, the middle operation window 2 is filled with a frame structure of explosion-proof glass, and the movable glass window 21 is provided on the front face of the frame structure, and the fixed glass window is provided on the remaining side, so that even if an overpressure explosion occurs, the relevant personnel will not be injured. The movable glass window 21 is closed by the gas emergency stop switch 22, and the high-pressure connector will not inflate the piece to be detected before the movable glass window 21 is closed, so as to ensure the safety of the operation.

[0044] Further, as shown in FIG. 6, the high-pressure connector is provided with a plurality of high-pressure connectors 61, 62, 63, 64, and 65, and the high-pressure connector is connected to the piece to be detected through the corresponding high-pressure connector. Figure 5As shown, in order to ensure the stability and controllability of the entire inflation process, we also set up a gas storage cylinder, an electromagnetic valve S1 and an electrically controlled pressure reducing valve between the compressor and the multi-way high-pressure electromagnetic valve. The gas storage cylinder can stabilize the inflation process and avoid impact. The addition of the electromagnetic valve S1 can make the inflation process controllable and double safe. The electrically controlled pressure reducing valve can quickly reduce pressure in case of emergency. In addition, a pressure sensor P1 is arranged between the electromagnetic valve S1 and the electrically controlled pressure reducing valve, and a pressure sensor P2 is arranged between the electrically controlled pressure reducing valve and the multi-way high-pressure electromagnetic valve. Through the pressure sensors P1 and P2, we can observe the pressure conditions of the two places, i.e., the electromagnetic valve S1 and the multi-way high-pressure electromagnetic valve, so as to more directly control the high-pressure gas.

[0045] Further, we also set up an electrically controlled exhaust valve on the multi-way high-pressure electromagnetic valve to facilitate pressure relief operation. An exhaust silencer is arranged at the outlet of the electrically controlled exhaust valve to reduce the noise generated during pressure relief.

[0046] Further, as shown in the drawings, Figure 6 The embodiment is controlled by the tool electric control unit to control the pressure reducer high-pressure gas tightness detection tool work, and a key panel, an instrument panel and a detection record panel are arranged on the upper part 1 of the body to facilitate the key control, data monitoring and detection record of the operator.

[0047] The tool electric control unit includes a DC power supply, a power relay, a multi-way high-pressure electromagnetic valve, a time relay and a five-port two-position electromagnetic valve.

[0048] The DC power supply is externally connected to AC power, and a power switch and a total emergency stop switch are arranged on the live wire. The DC power supply internally leads out a positive pole, a second positive pole and a negative pole. The positive pole of the power relay is electrically connected to the second positive pole through a test switch, and the negative pole of the power relay is electrically connected to the negative pole. One end of the normally open electrical contact of the power relay is electrically connected to the first positive pole through a gas supply emergency stop switch, and the other end of the normally open electrical contact of the power relay is electrically connected to the multi-way high-pressure electromagnetic valve, the electromagnetic valve S1, the electrically controlled pressure reducing valve and the positive pole of the buzzer, respectively. The negative poles of the multi-way high-pressure electromagnetic valve, the electromagnetic valve S1, the electrically controlled pressure reducing valve and the buzzer are electrically connected to the negative pole of the power supply. The normally closed electrical contact of the power relay is electrically connected to the positive pole of the electrically controlled exhaust valve, and the negative pole of the electrically controlled exhaust valve is electrically connected to the negative pole.

[0049] The positive pole of the time relay is electrically connected to the second positive pole through the test switch, and the negative pole of the time relay is electrically connected to the negative pole. One end of the normally open electrical contact of the time relay is electrically connected to the second positive pole, and the other end of the normally open electrical contact of the time relay is electrically connected to the positive pole of the five-port two-position electromagnetic valve. The negative pole of the five-port two-position electromagnetic valve is electrically connected to the negative pole of the power supply. The normally open electrical contact of the time relay is conductive after being energized, and automatically disconnected after a delay time.

[0050] Further, we are in the body of the upper part 1 and the middle part of the operation window 2 are provided with lighting 5, and is with the tool together to start and stop, to ensure reorganization lighting.

[0051] Further, as shown in Figure 7 The five-port two-position electromagnetic valve is provided with a first vent and a second vent; in use, first, the five-port two-position electromagnetic valve controls the lower three-way to be filled with air and the upper three-way to be exhausted, so that the first lifting cylinder 41 and the second lifting cylinder 42 are lifted by air pressure; when descending, the five-port two-position electromagnetic valve controls the reversing, the upper three-way is filled with air, and the lower three-way is exhausted, so that the air in the middle and lower parts of the first lifting cylinder 41 and the second lifting cylinder 42 is exhausted, thereby lowering the first lifting cylinder 41 and the second lifting cylinder 42.

[0052] The above embodiments only express the preferred embodiments, which are described in detail, but cannot be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model.

Claims

1. A pressure reducer high pressure air tightness detection tool, characterized in that, Including airtight detection tool body, high pressure gas circuit, low pressure gas circuit, airtight detection water tank (31) and the measured piece lifting platform (4); wherein, The airtight detection tool body includes the upper part (1), the middle operation window (2) and the lower part (3); wherein, the high pressure gas circuit is placed in the upper part (1), the low pressure gas circuit is placed in the lower part (3), the airtight detection water tank (31) is placed in the lower part (3), and the middle operation window (2) is connected between the upper part (1) and the lower part (3) through the support frame to form a frame structure. The measured piece lifting platform (4) is placed in the airtight detection water tank (31) and includes the first lifting cylinder (41), the second lifting cylinder (42), the lifting base and the middle operation platform; the lifting base includes the left leaf (43), the right leaf (44), the middle base plate (45) and the middle operation platform frame (46); the first lifting cylinder (41) and the second lifting cylinder (42) are respectively arranged at the bottom of the left leaf (43) and the right leaf (44) and are fixedly connected. The middle base plate (45) is concave and is provided with a plurality of through holes in the bottom surface, and the two ends are fixedly connected with the left leaf (43) and the right leaf (44); the middle operation platform frame (46) is arranged between the recesses formed by the middle base plate (45), and a plurality of measured piece operation tables (47) are mounted on the middle operation platform frame (46). The high pressure gas circuit includes a compressor, a plurality of high pressure electromagnetic valves, and a plurality of high pressure connectors corresponding to the measured piece operation tables (47); the compressor is connected with the plurality of high pressure electromagnetic valves through the air pipe, the plurality of high pressure electromagnetic valves are connected with the high pressure connectors through the air pipe; the bottom surface of the upper part (1) is provided with a hole (11), the high pressure connectors pass through the hole (11) and are placed in the middle operation window (2), and the high pressure connectors are connected with the measured piece. The low pressure gas circuit includes a five-port two-position electromagnetic valve, the first lifting cylinder (41), the second lifting cylinder (42), an upper three-way pipe and a lower three-way pipe; the first lifting cylinder (41) and the second lifting cylinder (42) are connected with the five-port two-position electromagnetic valve through the air pipe, the upper three-way pipe and the lower three-way pipe.

2. The high pressure air tightness detection tool for pressure reducer according to claim 1, characterized in that, The middle operation window (2) is filled with the frame structure through the explosion-proof glass; wherein, the front of the frame structure is provided with a movable glass window (21), and the remaining sides are provided with fixed glass windows, and the movable glass window (21) is closed and confirmed through the gas supply emergency stop switch (22).

3. The high pressure air tightness detection tool for pressure reducer according to claim 2, characterized in that, The high pressure gas circuit further comprises a gas storage bottle, an electromagnetic valve S1 and an electric control pressure reducing valve between the compressor and the plurality of high pressure electromagnetic valves; wherein, a pressure sensor P1 is further arranged between the electromagnetic valve S1 and the electric control pressure reducing valve, and a pressure sensor P2 is further arranged between the electric control pressure reducing valve and the plurality of high pressure electromagnetic valves.

4. The high pressure air tightness detection tool of a pressure reducer according to claim 3, characterized in that, An electric control exhaust valve is further arranged on the plurality of high pressure electromagnetic valves, and an exhaust silencer is further arranged at the outlet of the electric control exhaust valve.

5. The high pressure air tightness detection tool of a pressure reducer according to claim 4, characterized in that, A tool electric control unit is further arranged; wherein, the tool electric control unit includes a DC power supply, a power relay, a plurality of high pressure electromagnetic valves, a time relay and a five-port two-position electromagnetic valve. The DC power supply is externally connected to AC power, and a power switch and a general emergency stop switch are respectively arranged on the live wire. The DC power supply leads out a positive pole, a second positive pole and a negative pole. The positive pole end of the power relay is electrically connected to the second positive pole through a test switch, and the negative pole end is electrically connected to the negative pole. One end of the normally open electrical contact of the power relay is electrically connected to the first positive pole through a gas supply emergency stop switch, and the other end of the normally open electrical contact is respectively electrically connected to the positive pole of the multi-way high-pressure electromagnetic valve, the electromagnetic valve S1, the electrically controlled pressure reducing valve and the buzzer. The negative poles of the multi-way high-pressure electromagnetic valve, the electromagnetic valve S1, the electrically controlled pressure reducing valve and the buzzer are electrically connected to the negative pole of the power supply. The normally closed electrical contact of the power relay is electrically connected to the positive pole of the electrically controlled exhaust valve, and the negative pole end is electrically connected to the negative pole. The positive pole end of the time relay is electrically connected to the second positive pole through a test switch, and the negative pole end is electrically connected to the negative pole. One end of the normally open electrical contact of the time relay is electrically connected to the second positive pole, and the other end is electrically connected to the positive pole end of the five-port two-position electromagnetic valve. The negative pole of the five-port two-position electromagnetic valve is electrically connected to the negative pole end of the power supply. The normally open electrical contact of the time relay is turned on after being powered on, and is automatically turned off after a delay time.

6. The high pressure air tightness detection tool of a pressure reducer according to claim 5, characterized in that, The upper part (1) of the body is provided with a key panel, an instrument panel and a detection recording panel. The key panel is provided with a start key corresponding to the power switch, a general emergency stop key corresponding to the general emergency stop switch and a test key corresponding to the test switch. The instrument panel is provided with a barometer. The detection recording panel is provided with a record book.

7. The high pressure air tightness detection tool of a pressure reducer according to claim 6, characterized in that, The movable glass window (21) is provided with a gas supply emergency stop switch. When the movable glass window (21) is closed, the corresponding gas supply emergency stop switch is turned on. When the movable glass window (21) is opened, the corresponding gas supply emergency stop switch is turned off.

8. The high pressure air tightness detection tool of a pressure reducer according to claim 7, characterized in that, Lighting lamps (5) are arranged in the upper part (1) of the body and the middle part operation window body (2) respectively. One end of the lighting lamp (5) is connected between the power switch and the general emergency stop switch, and the other end is connected to the zero line.

9. The high pressure air tightness detection tool of a pressure reducer according to claim 8, characterized in that, The five-port two-position electromagnetic valve is provided with a first air vent and a second air vent. The first air vent is communicated with one end of the lower three-way through an air pipe, and the second air vent is communicated with one end of the upper three-way through an air pipe. The other two ends of the upper three-way are respectively communicated with the upper air cylinder ports of the first lifting cylinder (41) and the second lifting cylinder (42). The other two ends of the lower three-way are respectively communicated with the lower air cylinder ports of the first lifting cylinder (41) and the second lifting cylinder (42).

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