Device for testing operating temperature of high-pressure hydrogen cylinder valve

Abstract

The utility model relates to the technical field of high-pressure hydrogen cylinder valves, in particular to a high-pressure hydrogen cylinder valve operating temperature testing device which comprises a high-temperature box used for containing a valve to be tested, one side of the high-temperature box is provided with an opening, the opening side is provided with a transfer mechanism used for moving the valve to be tested, the valve to be tested is connected with a conveying pipe, and the conveying pipe is connected with the high-temperature box. And a pressure sensor is arranged on the conveying pipe. According to the utility model, the high-temperature box is arranged, and the transfer mechanism is arranged on one side of the opening of the high-temperature box, so that the action that the valve to be tested enters and exits the high-temperature box, the conveying pipe connected to the valve to be tested, gas introduction into the conveying pipe, heating of the valve through the high-temperature box and recording of the action temperature of the valve to be tested during unloading can be completed through the transfer mechanism; the device is simple in structure and reasonable in design, can quickly detect the action temperature of the high-pressure hydrogen cylinder valve on site so as to judge whether the high-pressure hydrogen cylinder valve is qualified or not, and provides convenience for acceptance inspection of the high-pressure hydrogen cylinder valve.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure hydrogen bottle valves, in particular to an operating temperature testing device for high-pressure hydrogen bottle valves. Background Art

[0002] High-pressure hydrogen cylinder valves need to meet a specific temperature range when working. For example, the temperature range of high-pressure hydrogen cylinder valves is an operating temperature of not less than -40°C and not more than 85°C. These are the two extreme temperatures in a hydrogen environment, and the laboratory equipment capacity is also within this temperature range. 85°C is a kind of protection for the bottle valve. If the temperature exceeds 85°C, the bottle valve will limit the flow (there is a temperature sensor on the bottle valve, and the flow is limited by the solenoid valve when it reaches 85°C). If it is higher than 110°C, the TPRD (temperature-driven safety pressure relief device) of the bottle valve will explode.

[0003] Due to the particularity of its use environment, it is not convenient to test the performance of high-pressure hydrogen cylinder valves. For example, the operating temperature cannot be effectively tested and the product performance cannot be ensured. In order to facilitate the purchase and acceptance of users, it is an urgent problem to develop a high-pressure hydrogen cylinder valve operating temperature test device to determine whether the high-pressure hydrogen cylinder valve is qualified. Utility Model Content

[0004] The purpose of the utility model is to provide a high-pressure hydrogen bottle valve operating temperature testing device, which can solve the above technical problems.

[0005] The utility model provides a high-pressure hydrogen cylinder valve operating temperature test device, including a high-temperature box for holding a valve to be tested, an opening is provided on one side of the high-temperature box, a transfer mechanism for moving the valve to be tested is provided on the opening side, a delivery pipe is connected to the valve to be tested, a pressure sensor is provided on the delivery pipe, and the pressure in the delivery pipe can be read. The effective working temperature range of the high-temperature box is greater than the operating temperature of the valve to be tested, and an electric heating wire is provided inside the high-temperature box, and the heating temperature can be set. The specific structure of the high-temperature box belongs to the prior art and will not be described in detail here.

[0006] Furthermore, a temperature measuring probe is provided on the surface of the valve to be tested, which is closely attached to the valve to be tested. The number of the temperature measuring probe is greater than or equal to 1, and its effective test range is greater than the operating temperature of the valve to be tested and the set temperature of the high temperature box.

[0007] Furthermore, the transfer mechanism includes a fixed platform, the upper part of which is provided with a roller module, the roller module includes a driving wheel fixedly connected to the output shaft of the motor and a driven wheel located below the driving wheel, an action arm is sandwiched between the driving wheel and the driven wheel, the action arm is closely fitted with the driving wheel and the driven wheel respectively, and a receiving plate is provided at one end of the action arm close to the high temperature box. The receiving plate is used to place the valve to be tested, and moves with the movement of the action arm. Specifically, the action arm is sandwiched between the driving wheel and the driven wheel. When the driving wheel rotates, the driven wheel is closely fitted with the action arm and also rotates, thereby facilitating the action arm to move forward or backward.

[0008] The action arm has good rigidity and good high temperature resistance, and has a certain length to ensure the realization of the movement.

[0009] Furthermore, flange plates protruding from the outer annular surfaces of the driving wheel and the driven wheel are provided on the sides thereof to limit the actuating arm and prevent the actuating arm from escaping from the gap between the driving wheel and the driven wheel during movement.

[0010] Furthermore, two roller modules are spaced apart on the upper portion of the fixed platform, which can prevent the action arm from tilting or falling in the up and down directions.

[0011] Furthermore, the outer annular surfaces of the driving wheel and the driven wheel are fixedly covered with anti-skid sleeves, and the anti-skid sleeves are made of polyurethane material.

[0012] Furthermore, the cross section of the action arm is circular or square.

[0013] Furthermore, the driven wheel is mounted on the fixed platform through a base, the base is a "J"-shaped structure, a cavity is provided on the top of the base, mounting seats are provided on both sides of the driven wheel and are rotatably connected thereto, the bottom of the mounting seat is located in the cavity and is slidably connected thereto, a screw is connected through the base and is threadedly connected thereto, and the upper end of the screw is in contact with the bottom of the mounting seat. When the valve to be tested is sent to the high-temperature box, the valve to be tested with high-pressure gas continues to heat up, and when it reaches its operating temperature, the TPRD of the bottle valve will explode, and the action arm will generate a corresponding reaction force in the horizontal direction. To prevent the action arm from being displaced in the horizontal direction, the mounting seat is moved upward in the cavity by rotating the screw, and the driven wheel connected to the mounting seat also moves upward, so that the action arm is more clamped by the driving wheel and the driven wheel, increasing the friction between the action arm and the driving wheel and the driven wheel.

[0014] Furthermore, a shut-off valve is provided on the delivery pipe.

[0015] Furthermore, nitrogen or inert gas is transported in the transport pipe.

[0016] Beneficial effects:

[0017] The utility model sets a high temperature box, and sets a transfer mechanism on one side of the opening of the high temperature box. The transfer mechanism can complete the action of the valve to be tested entering and exiting the high temperature box. Gas is introduced into the delivery pipe connected to the valve to be tested to simulate the state of the valve when working under high pressure and then test the action temperature of the valve. The valve is heated by the high temperature box, and the action temperature of the valve to be tested when unloaded is recorded. The device has a simple structure and a reasonable design, and can quickly detect the important indicator of the action temperature of the high-pressure hydrogen cylinder valve on site, thereby judging whether the high-pressure hydrogen cylinder valve is qualified, which provides convenience for the acceptance of the high-pressure hydrogen cylinder valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of the high-pressure hydrogen cylinder valve action temperature test device of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model when it is working;

[0021] Figure 3 This is a schematic diagram of the structure of the roller module in the utility model;

[0022] Figure 4 It is a structural schematic diagram of the base and the mounting seat in the utility model.

[0023] Explanation of the accompanying drawings: 1-high temperature box, 2-opening, 3-conveying pipe, 4-pressure sensor, 5-temperature measuring probe, 6-fixing platform, 7-valve to be tested, 8-driving wheel, 9-motor, 10-driven wheel, 11-actuating arm, 12-receiving plate, 13-flange plate, 14-base, 15-cavity, 16-mounting seat, 17-screw, 18-shut-off valve. DETAILED DESCRIPTION

[0024] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Example 1

[0028] A high-pressure hydrogen cylinder valve operating temperature test device, such as Figure 1-4 As shown, it includes a high temperature box 1 for holding the valve to be tested 7, an opening 2 is provided on one side of the high temperature box 1, and a transfer mechanism for moving the valve to be tested 7 is provided on the side of the opening 2. A delivery pipe 3 is connected to the valve to be tested 7, and a pressure sensor 4 is provided on the delivery pipe 3 to read the pressure in the delivery pipe 3, and a shut-off valve 18 is provided to control the on-off of the delivery pipe 3. Nitrogen or inert gas is transported in the delivery pipe 3. Nitrogen is used in this embodiment. Since the delivery pipe 3 needs to move with the valve to be tested 7, a conventional fixed pipeline cannot be used. The end of the delivery pipe 3 away from the valve to be tested 7 is connected to a nitrogen storage tank, and a moving wheel is provided at the bottom of the nitrogen storage tank. When the valve to be tested 7 enters and exits the high temperature box 1, the nitrogen storage tank is pushed to move with the valve to be tested 7.

[0029] The effective working temperature range of the high temperature box 1 is greater than the operating temperature of the valve 7 to be tested. It has an electric heating wire inside and has the function of setting the heating temperature. The specific structure of the high temperature box 1 belongs to the existing technology and will not be repeated here.

[0030] Specifically, a temperature measuring probe 5 is provided on the surface of the valve 7 to be tested, which is in close contact with the valve 7 to be tested. The number of the temperature measuring probe 5 is greater than or equal to 1, and its effective test range is greater than the operating temperature of the valve 7 to be tested and the set temperature of the high temperature box 1.

[0031] The transfer mechanism includes a fixed platform 6, and a roller module is provided on the upper part of the fixed platform 6. The roller module includes a driving wheel 8 fixedly connected to the output shaft of the motor 9 and a driven wheel 10 located below the driving wheel 8. An action arm 11 is sandwiched between the driving wheel 8 and the driven wheel 10. The action arm 11 is closely fitted with the driving wheel 8 and the driven wheel 10 respectively. A receiving plate 12 is provided at one end of the action arm 11 close to the high temperature box 1. The receiving plate 12 is used to place the valve 7 to be tested, and moves with the movement of the action arm 11. Specifically, the action arm 11 is sandwiched between the driving wheel 8 and the driven wheel 10. When the driving wheel 8 rotates, the driven wheel 10 is closely fitted with the action arm 11 and also rotates, thereby facilitating the action arm 11 to move forward or backward. The cross section of the action arm 11 is square, has good rigidity and good high temperature resistance, and has a certain length to ensure the realization of the movement. In addition, two roller modules are provided at intervals on the upper part of the fixed platform to prevent the action arm 11 from tilting or falling in the upper and lower directions.

[0032] Among them, the motor 9 is a forward and reverse motor, and the motor can be interlocked in forward and reverse rotation, which means that when the motor rotates forward, the motor cannot be reversed by mechanical or electrical means; conversely, when the motor reverses, it cannot rotate forward. There are many ways to implement this interlock, such as mechanical interlock, which is achieved by components in the mechanical transmission system. In the forward and reverse control, two contactors can be used, one for forward rotation and the other for reverse rotation. When the forward button is pressed, the forward contactor is energized, and the reverse contactor is mechanically locked. Similarly, when the reverse button is pressed, the reverse contactor is energized, and the forward contactor is mechanically locked, which ensures that the motor can only rotate in one direction.

[0033] In addition, the sides of the driving wheel 8 and the driven wheel 10 are provided with flange plates 13 protruding from their outer annular surfaces to limit the actuating arm 11 and prevent the actuating arm 11 from escaping from the gap between the driving wheel 8 and the driven wheel 10 during movement. The outer annular surfaces of the driving wheel 8 and the driven wheel 10 are fixed with anti-slip sleeves, which are made of polyurethane material.

[0034] In order to enhance the friction between the action arm 11 and the driving wheel 8 and the driven wheel 10, the driven wheel 10 is installed on the fixed platform 6 through a base 14. The base 14 is a "J"-shaped structure. A cavity 15 is provided on the top of the base 14. Mounting seats 16 are provided on both sides of the driven wheel 10 and are rotatably connected thereto. The bottom of the mounting seat 16 is located in the cavity 15 and is slidably connected thereto. A screw 17 is penetrated and connected to the base 14 and is threadedly connected thereto. The upper end of the screw 17 is in contact with the bottom of the mounting seat 16. When the valve 7 to be tested is sent to the high-temperature box 1, the valve 7 to be tested with high-pressure gas continues to heat up. When it reaches its operating temperature, the TPRD of the bottle valve will explode, and the actuating arm 11 will generate a corresponding reaction force in the horizontal direction. In order to prevent the actuating arm 11 from being displaced in the horizontal direction, the mounting seat 16 is moved upward in the cavity 15 by rotating the screw 17, and the driven wheel 10 connected to the mounting seat 16 is also moved upward, so that the actuating arm 11 is clamped more tightly by the driving wheel 8 and the driven wheel 10, thereby increasing the friction between the actuating arm 11 and the driving wheel 8 and the driven wheel 10.

[0035] Working and use process:

[0036] Place the valve 7 to be tested on the receiving plate 12, connect the delivery pipe 3, open the shut-off valve 18 to pass gas to give pressure to the valve 7 to be tested, and control the pressure to be slightly lower than the nominal working pressure. Drive the motor 9 to rotate the driving wheel 8, and then drive the action arm 11 to move toward the high-temperature box 1, send the valve 7 to be tested into the high-temperature box 1, and then start the high-temperature box 1 to gradually heat up the high-temperature box 1. At the same time, record the temperature of the valve 7 to be tested through the temperature measuring probe 5, monitor the temperature of the valve 7 to be tested in real time, and when the valve 7 to be tested is unloaded, record the temperature readings of each temperature measuring probe 5.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A high-pressure hydrogen cylinder valve operating temperature test device, characterized in that: It comprises a high temperature box for containing the valve to be tested, one side of the high temperature box is provided with an opening, the opening side is provided with a transfer mechanism for moving the valve to be tested, the valve to be tested is connected with a delivery pipe, and the delivery pipe is provided with a pressure sensor.

2. The high-pressure hydrogen cylinder valve operating temperature testing device according to claim 1 is characterized in that: A temperature measuring probe is arranged on the surface of the valve to be tested.

3. The high-pressure hydrogen cylinder valve operating temperature testing device according to claim 1 is characterized in that: The transfer mechanism includes a fixed platform, a roller module is provided on the upper part of the fixed platform, the roller module includes a driving wheel fixedly connected to the motor output shaft and a driven wheel located below the driving wheel, an action arm is clamped between the driving wheel and the driven wheel, the action arm is tightly fitted with the driving wheel and the driven wheel respectively, and a receiving plate is provided at one end of the action arm close to the high temperature box.

4. The high-pressure hydrogen cylinder valve operating temperature testing device according to claim 3 is characterized in that: The side surfaces of the driving wheel and the driven wheel are both provided with flange plates protruding from the outer annular surfaces thereof.

5. The high-pressure hydrogen cylinder valve operating temperature testing device according to claim 3 is characterized in that: The roller modules are provided with two at intervals on the upper portion of the fixing platform.

6. The high-pressure hydrogen cylinder valve operating temperature testing device according to claim 3 is characterized in that: The outer annular surfaces of the driving wheel and the driven wheel are both fixedly sleeved with anti-skid sleeves.

7. The high-pressure hydrogen cylinder valve operating temperature testing device according to claim 3 is characterized in that: The cross section of the action arm is circular or square.

8. The high-pressure hydrogen cylinder valve operating temperature testing device according to claim 3 is characterized in that: The driven wheel is mounted on the fixed platform through a base, the base is a "X"-shaped structure, a cavity is provided on the top of the base, mounting seats are provided on both sides of the driven wheel and are rotatably connected thereto, the bottom of the mounting seat is located in the cavity and is slidably connected thereto, a screw rod is penetrated and connected to the base and is threadedly connected thereto, and the upper end of the screw rod is in contact with the bottom of the mounting seat.

9. The high-pressure hydrogen cylinder valve operating temperature testing device according to claim 1 is characterized in that: The delivery pipe is provided with a cut-off valve.

10. The high-pressure hydrogen cylinder valve operating temperature testing device according to claim 1, characterized in that: Nitrogen or inert gas is transported in the transport pipe.

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