Equipment for detecting characteristics of altitude valve in high and low temperature environment

Abstract

The invention discloses altitude valve characteristic detection equipment under high and low temperature environments in the technical field of altitude valve detection, which comprises a test trigger mechanism, a test carrier for placing a to-be-detected altitude valve, and a high-pressure gas storage module with a gas pressure sensor and a gas flowmeter, and is characterized in that the test trigger mechanism drives a trigger deflector rod to move leftwards or rightwards; therefore, the rotary connecting rod of the to-be-measured height valve is triggered, and the rotary connecting rod enables an air path in the to-be-measured height valve to change. According to the invention, through the cooperation between the test triggering mechanism and the high-pressure gas storage module, unified adjustment can be carried out on different temperature environments, and the characteristics of the altitude valve can be detected under different temperature conditions, so that the problem that the current detection environment cannot be consistent is solved; and repeatedly detecting the characteristics of the remanufactured altitude valve, observing the change of the flow characteristic curve, and judging the reliability of the remanufactured altitude valve in the batch.

Description

Technical Field

[0001] The present invention relates to the technical field of altitude valve detection, in particular to an altitude valve characteristic detection device under high and low temperature environments. Background Art

[0002] Height valves are widely used in vehicles with air suspension, such as high-end cars, trucks, etc. Due to the diversity of vehicle usage, for remanufactured height valves, it is important to test whether the characteristics of the valve body will change in high and low temperature environments and to conduct multiple experiments in high and low temperature cycles to test the reliability of such remanufactured valve bodies.

[0003] Currently, there is a lack of dedicated testing equipment to test altitude valves in the above-mentioned high and low temperature environments. Testing in a single environment requires repeated replacement of testing equipment and testing environment, which affects the final test results and greatly affects the overall test efficiency.

[0004] Based on this, the present invention designs a height valve characteristic detection device under high and low temperature environments to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a device for detecting the characteristics of an altitude valve in a high and low temperature environment, so as to solve the problem raised in the above background technology that there is currently a lack of dedicated detection equipment to detect the altitude valve in the above high and low temperature environment, and that the detection of a single environment requires repeated replacement of the detection equipment and the detection environment, which affects the final detection result, and the overall detection efficiency is greatly affected.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for detecting the characteristics of an altitude valve under high and low temperature environments, comprising a test trigger mechanism, a test carrier for placing the altitude valve to be tested, and a high-pressure gas storage module with an air pressure sensor and a gas flow meter, wherein the test trigger mechanism drives a trigger lever to move left or right, thereby triggering a rotating connecting rod of the altitude valve to be tested, and the rotating connecting rod causes the gas path inside the altitude valve to be tested to change;

[0007] When the trigger lever moves the rotating connecting rod of the height valve to be measured to the left, the air supply end and the inflation end are connected internally. At this time, the high-pressure air at the air supply end enters the high-pressure air storage module through the valve core of the height valve to be measured. The greater the angle of the rotating connecting rod moved by the trigger lever, the greater the air flow rate of the high-pressure air at the air supply end entering the high-pressure air storage module through the inflation end.

[0008] When the trigger lever moves the rotating connecting rod of the height valve to be measured to the right, the inflation end is connected to the atmosphere inside the height valve to be measured. Under the action of the pressure difference, the air pressure of the high-pressure air storage module begins to pass through the inflation end of the height valve to be measured and finally connects to the atmosphere, and begins to release pressure. The greater the flow rate of gas pressure relief and the angle of the rotating connecting rod moved by the trigger lever, the greater the gas flow rate;

[0009] The air pressure sensor and the gas flow meter transmit the flow data and air pressure data to the control system, and the corresponding relationship between the deflection angle and stroke of the rotating connecting rod of the height valve to be tested is obtained to obtain the test curve.

[0010] In a further solution, a box is also included, and the test trigger mechanism and the test vehicle are installed inside the box.

[0011] In a further solution, the box body is configured as a sealable structure, and a plurality of circular holes are provided on the box body, and the plurality of circular holes are connected to external pipes, and the external pipes can be connected to transport a cold air source or a hot air source, and the external pipes are connected to a switch valve body for controlling the entry of the cold air source or the hot air source.

[0012] In a further solution, a temperature sensor is provided inside the box to detect the temperature, and the temperature sensor is connected to a control system to control the flow of cold / hot air into the box, thereby performing temperature control.

[0013] In a further solution, the box is provided with a support structure, which includes support columns and a test platform. The support columns support the test platform to facilitate the circulation of cold / hot air; the test trigger mechanism and the clamping and fixing mechanism are both installed on the test platform.

[0014] In a further embodiment, the test trigger mechanism includes a motor, a ball screw module and a trigger lever;

[0015] When testing is required, the control system drives the motor, and the motor drives the trigger lever to move left or right through the ball screw module, thereby triggering the rotating connecting rod of the height valve to be measured. The rotating connecting rod causes the air path inside the height valve to be measured to change.

[0016] In a further solution, the test carrier is a replaceable carrier, and the shape of the inner concave cavity of the test carrier is adapted to the outer contour of the height valve to be measured, so as to limit the degree of freedom of the height valve to be measured.

[0017] In a further solution, a clamping and fixing mechanism is also included, and the replaced test carrier cooperates with the clamping and fixing mechanism to ensure that the replaced test carrier can be clamped by the clamping and fixing mechanism when loading a new height valve to be tested.

[0018] In a further scheme, the clamping and fixing mechanism includes a fixed support plate, a screw module, a servo motor and a double-rod clamping mechanism, wherein the double-rod clamping mechanism includes a U-shaped double-rod fixing block, a cushion block and a double rod, the fixed support plate is used to install the clamping and fixing mechanism, the servo motor drives the screw module to transmit, drives the slider on the module to move, the double-rod clamping mechanism is fixed on the slider of the screw module, the slider drives the double-rod clamping mechanism to move, the U-shaped double-rod fixing block is connected to the slider of the screw module through the cushion block, and the double rod is fixed on the U-shaped double-rod fixing block.

[0019] In a further solution, the high-pressure gas storage module includes an air pressure sensor, a high-pressure gas storage bag, a gas flow meter, an air charging pipe and an air supply pipe. The air supply pipe is connected to the air supply connection hole of the height valve to be measured through a hose, and is the air supply end during the test of the height valve to be measured. The air pressure sensor is installed on the high-pressure gas storage bag, and the other side of the high-pressure gas storage bag is connected to the gas flow meter through a pipe. The air charging pipe is connected to the air charging connection hole of the height valve to be measured through a hose.

[0020] The height valve to be measured is provided with a first pressing hole position and a second pressing hole position that match the double rods in the double rod pressing mechanism.

[0021] (1) Compared with the prior art, the present invention has the following beneficial effects: the present invention utilizes the cooperation between the test trigger mechanism and the high-pressure gas storage module to make uniform adjustments for different temperature environments and detect the characteristics of the height valve under different temperature conditions, thus solving the problem that the current detection environment cannot achieve consistency;

[0022] (2) The remanufactured height valve characteristic detection of the present invention at room temperature: the air filling and exhausting state detection of the valve body during the left or right movement of the piston rod; the change of the piston rod rotation angle and the change of the consistency curve of the air flow channel;

[0023] (3) The remanufacturing height valve characteristic detection of the present invention under high temperature state: the air filling and exhausting state detection of the valve body during the left or right movement of the piston rod; the change of the piston rod rotation angle and the change of the consistency curve of the air flow channel;

[0024] (4) The remanufacturing height valve characteristic detection of the present invention under low temperature conditions: detection of the air filling and exhausting state of the valve body during the left or right movement of the piston rod; detection of the consistency curve of the change in the air flow channel due to the change in the rotation angle of the piston rod;

[0025] (5) The present invention repeatedly performs characteristic tests on the remanufactured altitude valves under multiple cycles of high and low temperatures, observes changes in the flow characteristic curve, and thereby determines the reliability of the batch of remanufactured altitude valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the structure of the equipment components of the present invention;

[0028] Figure 2 It is a schematic diagram of the box and the supporting structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the rear door panel structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the height valve to be measured according to the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of the high-pressure gas storage module of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the test trigger mechanism of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of the test vehicle of the present invention;

[0034] Figure 8 It is a schematic diagram of the structure of the clamping and fixing mechanism of the present invention.

[0035] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0036] 1-support structure, 1.1-support column, 1.2-test platform, 2-box, 2.1-left door panel, 2.1.1-round hole 1, 2.1.2-round hole 2, 2.2-right door panel, 2.2.1-round hole 3, 2.2.2-round hole 4, 2.4-rear door panel, 2.4.1-air supply pipe connection hole, 2.4.2-inflating pipe connection hole, 3-test trigger mechanism, 3.1-motor, 3.2-ball screw module, 3.3-trigger lever, 4-test vehicle, 5-high-pressure gas storage module, 5. 1-air pressure sensor, 5.2-high-pressure air storage bag, 5.3-gas flow meter, 5.4-inflation pipe, 5.5-air supply pipe, 6-clamping and fixing mechanism, 6.1-fixed support plate, 6.2-screw module, 6.3-servo motor, 6.4-double-rod clamping mechanism, 6.4.1-U-shaped double-rod fixing block, 6.4.2-pad, 6.4.3-double rod, 7-height valve to be measured, 7.1-gas connection hole one, 7.2-gas connection hole two, 7.3-fixing hole position one, 7.4-fixing hole position two. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1-8 , the present invention provides a technical solution: the whole device is composed of seven parts: a support structure 1, a box 2, a test trigger mechanism 3, a test carrier 4, a high-pressure gas storage module 5, a clamping and fixing mechanism 6, and a height valve to be measured 7;

[0039] The box body 2 is composed of front and rear door panels, upper and lower door panels, and left and right door panels. The front door panel is connected to the frames of the upper, lower, left and right door panels, and finally combined into a closed box body; the left door panel 2.1 is provided with two parallel circular holes: circular hole one 2.1.1 and circular hole two 2.1.2, and the right door panel 2.2 is provided with upper and lower circular holes three 2.2.1 and circular hole four 2.2.2, each hole can be connected to an external pipeline, and a switch valve body is connected to the pipeline.

[0040] The support column 1.1 supports the test platform 1.2 to facilitate the circulation of hot and cold air; all the devices to be tested are placed on the test platform 1.2.

[0041] When it is necessary to test in a high temperature environment, the valve body between the circular hole 4 2.2.2 and the hot air is opened, and at the same time, the pipes connecting the circular holes 1 2.1.1, 2.1.2 and 4.2.2 and the pipes connected to the external atmosphere are opened, and then, the hot air enters from the circular hole 4 2.2.2, pushing the air in the box 2 to flow out from the circular holes 1 2.1.1, 2.1.2 and 3.2.1. The control system can control the flow rate of the hot air flowing into the box 2 according to the data of the temperature sensor built into the box 2, thereby performing temperature control;

[0042] When it is necessary to conduct a test experiment in a low-temperature environment, open the valve body connecting the pipe corresponding to circular hole three 2.2.1 and the cold air, so that the cold air enters from circular hole three 2.2.1, and pushes the air in the box 2 to flow out from circular hole one 2.1.1, circular hole two 2.1.2 and circular hole four 2.2.2. The control system can control the flow rate of cold air flowing into the box 2 according to the data of the temperature sensor built into the box 2, thereby performing temperature control.

[0043] The rear door plate 2.4 has two holes: a gas supply pipe connection hole 2.4.1 and a gas charging pipe connection hole 2.4.2; the height valve 7 to be measured has two gas connection holes, namely a gas connection hole 1 7.1 and a gas connection hole 2 7.2; the height valve 7 to be measured has two fixed hole positions, namely a fixed hole position 1 7.3 and a fixed hole position 2 7.4; a rotating connecting rod 7.5 is provided on the height valve 7 to control the movement of the valve core inside the height valve 7 to be measured;

[0044] An air supply pipe 5.5 is connected to the box body 2, enters the box body 2 through the air supply pipe connecting hole 2.4.1, and is connected to the gas connecting hole 1 7.1 through a hose, which is the air supply end during the test of the height valve 7 to be measured; the inflation pipe connecting hole 2.4.2 is connected to the inflation pipe 5.4, and after the inflation pipe 5.4 enters the box body 2, it is connected to the gas connecting hole 2 7.2 through a hose, which is the inflation end during the test of the height valve 7 to be measured, the inflation pipe 5.4 is connected to the gas flow meter 5.3, and then connected to the high-pressure air storage bag 5.2, and the air pressure sensor 5.1 is installed on one side of the high-pressure air storage bag 5.2.

[0045] The test trigger mechanism 3 is composed of a motor 3.1, a ball screw module 3.2, and a trigger lever 3.3; the entire test trigger mechanism 3 is installed on the test platform 2.5. When a test is required, the control system drives the motor 3.1, and the motor 3.1 drives the trigger lever 3.3 to move left or right through the ball screw module 3.2, thereby triggering the rotating connecting rod 7.5 of the height valve 7 to be tested, and the rotating connecting rod 7.5 causes the air path inside the height valve 7 to be tested to change.

[0046] When the trigger lever 3.3 moves the rotating connecting rod 7.5 of the height valve 7 to be measured to the left, the air supply end and the inflation end are connected internally. At this time, the high-pressure air at the air supply end enters the high-pressure air storage bag 5.2 through the valve core of the height valve 7 to be measured. The greater the angle of the rotating connecting rod 7.5 moved by the trigger lever 3.3, the greater the air flow rate of the high-pressure air at the air supply end entering the high-pressure air storage bag 5.2 through the inflation end.

[0047] When the trigger lever 3.3 moves the rotating connecting rod 7.5 of the height valve 7 to be measured to the right, the inflation end is connected to the atmosphere inside the height valve 7 to be measured. Under the action of the pressure difference, the air pressure of the high-pressure air storage bag 5.2 begins to pass through the inflation end of the height valve 7 to be measured and finally connects to the atmosphere, and begins to release pressure. The flow rate of gas pressure relief is related to the angle at which the trigger lever 3.3 moves the rotating connecting rod 7.5. The larger the angle, the greater the air flow rate.

[0048] The test carrier 4 is a replaceable carrier, which is fixed on the test platform 2.5 by bolts. The shape of the inner concave cavity of the test carrier 4 is designed and processed according to the outer contour of the height valve 7 to be measured, and can reliably limit the freedom of the height valve 7 to be measured.

[0049] When it is necessary to replace the height valve 7 to be measured with a different model or shape, the corresponding test carrier 4 can be replaced. The replaced test carrier 4 cooperates with the clamping and fixing mechanism 6, so as to ensure that when the replaced test carrier 4 is loaded with a new height valve 7 to be measured, the fixing hole position 1 7.3 and the fixing hole position 2 7.4 of the height valve 7 to be measured can still be pressed by the two double rods 6.4.3 of the clamping and fixing mechanism 6.

[0050] The high-pressure gas storage module 5 is composed of a gas pressure sensor 5.1, a high-pressure gas storage bag 5.2, a gas flow meter 5.3, an air charging pipeline 5.4 and an air supply pipeline 5.5.

[0051] One end of the gas supply pipe 5.5 is connected to the gas connection hole 1 7.1 of the height valve 7 to be measured through a hose, and the other end is connected to an external high-pressure gas source. One end of the inflation pipe 5.4 is connected to the gas connection hole 2 7.2 of the height valve 7 to be measured through a hose, and the other end is connected to a gas flow meter 5.3. The gas flow meter 5.3 can detect the gas flow rate flowing through per unit time, and send the flow data to the control system, and the corresponding relationship with the deflection angle stroke of the rotating connecting rod 7.5 of the current height valve 7 to be measured is obtained to obtain a test curve. The high-pressure air storage bag 5.2 is used to store high-pressure air. A pressure sensor 5.1 is installed on one side of the high-pressure air storage bag 5.2 to display the current air pressure and pressure changes, and send the data to the control system.

[0052] The clamping and fixing mechanism 6 is composed of a fixed support plate 6.1, a screw module 6.2, a servo motor 6.3 and a double-rod clamping mechanism 6.4; wherein the double-rod clamping mechanism 6.4 is composed of a U-shaped double-rod fixing block 6.4.1, a cushion block 6.4.2 and a double rod 6.4.3. The entire clamping and fixing mechanism 6 is installed on the fixed support plate 6, the screw module 6.2 and the servo motor 6.3 are a moving kit, the servo motor 6.3 drives the screw module 6.2 to drive, thereby driving the slider on the module to move; the double-rod clamping mechanism 6.4 is fixed on the slider of the screw module 6.2, when the slider moves up and down, it drives the double-rod clamping mechanism 6.4 to move, the U-shaped double-rod fixing block 6.4.1 is connected to the slider of the screw module 6.2 through the cushion block 6.4.2, and the double rod 6.4.3 is fixed on the U-shaped double-rod fixing block 6.4.1.

[0053] The height valve to be measured 7 has a gas connection hole 1 7.1 connected to the gas supply pipeline; a gas connection hole 2 7.2 connected to the inflation pipeline; a fixed hole 1 7.3 and a fixed hole 2 7.4 are the clamping holes of the double rods 6.4.3 in the double rod clamping mechanism 6.4. When the trigger lever 3.3 moves the rotating connecting rod 7.5, the valve core inside the height valve to be measured 7 changes, thereby changing the gas path.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A height valve characteristic detection device under high and low temperature environment, characterized by: The invention comprises a test trigger mechanism (3), a test vehicle (4) on which a height valve (7) to be measured is placed, and a high-pressure gas storage module (5) with a gas pressure sensor (5.1) and a gas flow meter (5.3); the test trigger mechanism (3) drives a trigger lever (3.3) to move leftward or rightward, thereby triggering a rotating connecting rod (7.5) of the height valve (7) to be measured; the rotating connecting rod (7.5) causes the gas path inside the height valve (7) to be measured to change; When the trigger lever (3.3) moves the rotating connecting rod (7.5) of the height valve (7) to be measured to the left, the air supply end and the inflation end are internally connected, and the high-pressure air at the air supply end enters the high-pressure air storage module (5) through the valve core of the height valve (7) to be measured. The greater the angle at which the rotating connecting rod (7.5) is moved by the trigger lever (3.3), the greater the air flow rate of the high-pressure air at the air supply end entering the high-pressure air storage module (5) through the inflation end. When the trigger lever (3.3) moves the rotating connecting rod (7.5) of the height valve (7) to be measured rightward, the inflation end is connected to the atmosphere inside the height valve (7) to be measured, and the air pressure of the high-pressure air storage module (5) begins to pass through the inflation end of the height valve (7) to be measured under the action of the pressure difference and finally connects to the atmosphere, and begins to release pressure. The greater the flow rate of gas pressure release and the angle at which the trigger lever (3.3) moves the rotating connecting rod, the greater the air flow rate; The air pressure sensor (5.1) and the gas flow meter (5.3) transmit the flow data and the air pressure data to the control system, and the deflection angle stroke correspondence of the rotating connecting rod (7.5) of the height valve (7) to be tested currently is obtained to obtain a test curve.

2. The device for detecting the characteristics of a height valve under high and low temperature environments according to claim 1, characterized in that: It also includes a box (2), wherein the test trigger mechanism (3) and the test carrier (4) are both installed inside the box (2).

3. The device for detecting the characteristics of a height valve under high and low temperature environments according to claim 2, characterized in that: The box body (2) is configured as a sealable structure, and a plurality of circular holes are provided on the box body (2), the plurality of circular holes are connected to external pipes, the external pipes can be connected to a cold air source or a hot air source, and the external pipes are connected to a switch valve body for controlling the entry of the cold air source or the hot air source.

4. The device for detecting the characteristics of a height valve under high and low temperature environments according to claim 3 is characterized in that: A temperature sensor is arranged inside the box (2) to detect the temperature, and the temperature sensor is connected to a control system to control the flow rate of cold / hot air flowing into the box (2), thereby performing temperature control.

5. The device for detecting the characteristics of a height valve under high and low temperature environments according to claim 4, characterized in that: The box body (2) is provided with a support structure (1), and the support structure (1) comprises a support column (1.1) and a test platform (1.2), the support column (1.1) supports the test platform (1.2) to facilitate the circulation of cold / hot air; the test trigger mechanism (3) and the clamping and fixing mechanism (6) are both installed on the test platform (1.2).

6. The device for detecting the characteristics of a height valve under high and low temperature environments according to claim 1 is characterized in that: The test trigger mechanism (3) comprises a motor (3.1), a ball screw module (3.2) and a trigger lever (3.3); When a test is required, the control system drives the motor (3.1), and the motor (3.1) drives the trigger lever (3.3) to move leftward or rightward via the ball screw module (3.2), thereby triggering the rotating connecting rod (7.5) of the height valve (7) to be measured, and the rotating connecting rod (7.5) causes the air path inside the height valve (7) to be measured to change.

7. The device for detecting the characteristics of a height valve under high and low temperature environments according to claim 1 is characterized in that: The test carrier (4) is a replaceable carrier, and the shape of the inner concave cavity of the test carrier (4) is adapted to the outer contour of the height valve (7) to be measured, so as to restrict the degree of freedom of the height valve (7) to be measured.

8. The device for detecting the characteristics of a height valve under high and low temperature environments according to claim 7 is characterized in that: It also includes a clamping and fixing mechanism (6), and the replaced test carrier (4) cooperates with the clamping and fixing mechanism (6), thereby ensuring that the replaced test carrier (4) can be clamped by the clamping and fixing mechanism (6) when loading a new height valve (7) to be measured.

9. The device for detecting the characteristics of a height valve in a high and low temperature environment according to claim 8, characterized in that: The clamping and fixing mechanism (6) comprises a fixed support plate (6.1), a screw module (6.2), a servo motor (6.3) and a double-rod clamping mechanism (6.4), wherein the double-rod clamping mechanism (6.4) comprises a U-shaped double-rod fixing block (6.4.1), a cushion block (6.4.2) and a double rod (6.4.3); the fixed support plate (6.1) is used to install the clamping and fixing mechanism (6); the servo motor (6.3) drives the screw module (6.2) to transmit, driving the slider on the module to move; the double-rod clamping mechanism (6.4) is fixed on the slider of the screw module (6.2); the slider drives the double-rod clamping mechanism (6.4) to move; the U-shaped double-rod fixing block (6.4.1) is connected to the slider of the screw module (6.2) via the cushion block (6.4.2); and the double rod (6.4.3) is fixed on the U-shaped double-rod fixing block (6.4.1).

10. The device for detecting the characteristics of a height valve under high and low temperature environments according to claim 9, characterized in that: The high-pressure gas storage module (5) comprises an air pressure sensor (5.1), a high-pressure gas storage bag (5.2), a gas flow meter (5.3), an air charging pipeline (5.4) and an air supply pipeline (5.5); the air supply pipeline (5.5) is connected to the air supply connection hole of the height valve (7) to be measured via a hose, and is the air supply end during the test of the height valve (7) to be measured; the air pressure sensor (5.1) is installed on the high-pressure gas storage bag (5.2); the other side of the high-pressure gas storage bag (5.2) is connected to the gas flow meter (5.3) via a pipeline; and the air charging pipeline (5.4) is connected to the air charging connection hole of the height valve (7) to be measured via a hose; The height valve to be measured (7) is provided with a first pressing hole (7.3) and a second pressing hole (7.4) which cooperate with the double rods (6.4.3) in the double rod pressing mechanism (6.4).

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