A valve end face inclination detection device and method for gas

Abstract

The present application relates to the technical field of detection, and specifically discloses a valve end face inclination detection device and detection method for gas, which comprises a base, a valve body is horizontally installed on the base, and the end face to be detected of the valve body is vertically upward, a detection assembly is arranged above the valve body, the detection assembly is composed of a horizontal temperature detection surface corresponding to the end face to be detected, a plurality of temperature sensors are distributed along the radial direction of the horizontal temperature detection surface, the horizontal temperature detection surface is in contact with the end face to be detected and rotates, the temperature sensors measure the temperature of the horizontal temperature detection surface from the edge to the center in the radial direction in real time during the rotation, if only the temperature of the edge region increases, it is determined that the end face to be detected is an inclined surface, and if the temperature of all regions from the edge to the center increases synchronously, it is determined that the end face to be detected is a horizontal surface. The present application can effectively detect whether the butt joint end face of the valve is inclined, ensure that the sealing performance of the connection end face of the valve body when connected with the pipeline is stronger, and the risk of gas leakage is less likely to occur.

Description

Technical Field

[0001] This invention relates to the field of testing technology, specifically to a device and method for detecting the inclination of the end face of a gas valve. Background Technology

[0002] Gas valves are control components in gas delivery systems, serving functions such as shut-off, regulation, flow diversion, backflow prevention, pressure stabilization, flow splitting, and pressure relief. Valves used in gas control systems range from the simplest shut-off valves to various valves used in highly complex automated control systems, with a wide variety of types and specifications.

[0003] For gas valves on some main pipelines, flanges are typically welded to the inlet and outlet ends of the gas valve, and then connected to the corresponding pipeline via bolts. A sealing ring is installed between the pipeline and the flange of the gas valve. This connection method uses end-to-end contact. To avoid gas leakage, the inclination of the mating end face (flange side) of the gas valve and the pipeline is crucial. During the manufacturing process, the flange end face may be machined with an inclination. During later installation, the mating end face consists of an incline and a straight surface. When the pipeline and gas valve are installed coaxially, the incline and straight surface cannot completely fit together, leaving a gap. Even after the bolts are tightened, there is still a risk of gas leakage, and even explosions or other safety accidents. Therefore, the inclination detection of the mating end face of the gas valve and the pipeline is particularly important. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for detecting the tilt of the valve end face, which can effectively detect whether the valve mating end face is tilted, ensuring stronger sealing of the valve body when connected to the pipeline and reducing the risk of gas leakage.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0006] A gas valve end face tilt detection device includes a base for mounting a valve body, the valve body being horizontally mounted on the base with the end face to be tested facing vertically upwards. A detection component is provided above the valve body, the detection component forming a horizontal temperature detection surface corresponding to the end face to be tested. Several temperature sensors are radially distributed along the horizontal temperature detection surface. The horizontal temperature detection surface contacts and rotates with the end face to be tested. The temperature sensors measure the temperature of the horizontal temperature detection surface radially from the edge to the center during the rotation in real time. If only the temperature of the edge area rises, the end face to be tested is determined to be tilted; if the temperature of all areas from the edge to the center rises synchronously, the end face to be tested is determined to be horizontal.

[0007] In this invention, the detection device is designed based on the fundamental principle that friction between two objects generates heat, and that heat is transferred between the two objects. The valve body to be detected is mounted on a base, with the end face to be detected facing upwards. The valve body is installed horizontally. The horizontal temperature detection surface of the upper detection component contacts the end face to be detected. The horizontal temperature detection surface rotates and generates heat through friction with the end face to be detected, causing the temperature of the part of the horizontal temperature detection surface in contact with the end face to rise. The end face to be detected is a circular surface. If the end face to be detected is inclined, when the horizontal temperature detection surface contacts it, only one edge area of ​​the end face to be detected can contact the horizontal temperature detection surface. There is a certain angle between the end face to be detected and the horizontal temperature detection surface. The larger the inclination angle, the larger the angle and the smaller the contact area with the horizontal temperature detection surface. Conversely, the smaller the angle, the larger the contact area with the horizontal temperature detection surface. If the end face to be detected is horizontal, it is equivalent to being parallel to the horizontal temperature detection surface, and then the horizontal temperature detection surface is in complete contact with the end face to be detected.

[0008] Therefore, when the horizontal temperature sensing end face rotates, if the end face to be detected is inclined, only the higher end of the end face to be detected will contact the horizontal temperature sensing end face. That is, the edge region of the horizontal temperature sensing end face can generate heat through friction. This rotational friction causes the temperature of the edge region of the horizontal temperature sensing end face to rise. The temperature sensor in the edge region will detect this temperature rise, thus determining that the end face to be detected is inclined. If the temperature sensor on the edge towards the center also detects a temperature rise, it can be determined that the inclination of the end face to be detected is relatively small.

[0009] If the end face to be tested is horizontal, then the end face to be tested is in complete contact with the horizontal temperature sensing surface. The entire area from the edge to the center of the horizontal temperature sensing surface can generate heat through friction with the end face to be tested. At this time, the rotational friction causes the temperature of the area from the edge to the center of the horizontal temperature sensing surface to rise. All temperature sensors in the area from the edge to the center simultaneously detect the temperature rise, thus determining that the end face to be tested is horizontal. Therefore, this invention can effectively detect whether the valve mating end face is tilted, ensuring stronger sealing at the connection end face when the valve body is connected to the pipeline, and reducing the risk of gas leakage.

[0010] Optionally, the detection assembly includes a circular detection plate, a driving component for rotating the detection plate, and a telescopic cylinder for adjusting the height of the driving component. The telescopic cylinder is mounted on a bracket above the base. The telescopic end of the telescopic cylinder is connected to the driving component. The output shaft of the driving component is connected to the center of the top surface of the detection plate. A heat-conducting part is provided horizontally on the bottom surface of the detection plate. The bottom surface of the heat-conducting part constitutes the horizontal temperature detection surface. Temperature sensors are distributed within the heat-conducting part.

[0011] Optionally, the heat-conducting part has a cavity inside, and the temperature sensor is bonded to the bottom wall of the cavity, with the sensing end of the temperature sensor in contact with the heat-conducting part.

[0012] Optionally, the temperature sensors are distributed within the radius or diameter range of the detection plate.

[0013] Optionally, the heat-conducting part includes a plurality of hollow heat-conducting rings, which are distributed in concentric rings on the bottom surface of the detection plate, and the bottom surfaces of the plurality of heat-conducting rings are located on the same horizontal plane.

[0014] Optionally, the heat-conducting rings are evenly spaced, and the bottom end of the heat-conducting rings is arc-shaped.

[0015] Optionally, the driving component is a motor, which is vertically fixed to the telescopic end of the telescopic cylinder.

[0016] Optionally, the base is provided with top-pressing components located on both sides of the valve body, which fix the valve body to the base.

[0017] Optionally, the top pressure assembly includes a top pressure cylinder and a top pressure plate. The top pressure cylinder is fixed on the base and arranged in a cross shape. The top pressure plate is fixed to the telescopic end of the top pressure cylinder. A rubber plate is provided on the side of the top pressure plate opposite to the valve body.

[0018] A method for detecting the inclination of the end face of a gas valve includes the following steps;

[0019] S1: After cleaning the end face of the valve body to be tested, place it on the base with the end face of the valve body to be tested facing vertically upwards, and fix the valve body from four directions by the top pressure assembly;

[0020] S2: Measure the levelness of the test plate with a spirit level to ensure that the horizontal temperature test surface is in a horizontal state. The telescopic cylinder drives the motor to move downward so that the horizontal temperature test surface contacts the end face to be tested.

[0021] S3: The motor rotates, and the horizontal temperature detection surface rubs against the end face to be detected. The heat-conducting ring in contact with the end face to be detected heats up. The temperature sensor measures the temperature of the heat-conducting ring in each area along the radial direction of the detection plate. If only the temperature of the edge area rises, the end face to be detected is determined to be an inclined surface. If the temperature of all areas from the edge to the center rises synchronously, the end face to be detected is determined to be a horizontal surface.

[0022] The beneficial effects of this invention are as follows:

[0023] In this invention, when the horizontal temperature detection end face rotates, if the end face to be detected is an inclined surface, then only the higher end of the end face to be detected will contact the horizontal temperature detection end face. That is, the edge area of ​​the horizontal temperature detection end face can generate heat through friction with the end face to be detected. This rotational friction causes the temperature of the edge area of ​​the horizontal temperature detection end face to rise. The temperature sensor in the edge area will detect the rise in temperature of the edge area of ​​the horizontal temperature detection end face, thereby determining that the end face to be detected is an inclined surface.

[0024] If the end face to be tested is horizontal, then the end face to be tested is in complete contact with the horizontal temperature sensing surface. The entire area from the edge to the center of the horizontal temperature sensing surface can generate heat through friction with the end face to be tested. At this time, the rotational friction causes the temperature of the area from the edge to the center of the horizontal temperature sensing surface to rise. All temperature sensors in the area from the edge to the center simultaneously detect the temperature rise, thus determining that the end face to be tested is horizontal. Therefore, this invention can effectively detect whether the valve mating end face is tilted, ensuring stronger sealing at the connection end face when the valve body is connected to the pipeline, and reducing the risk of gas leakage. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the distribution structure of the heat-conducting rings on the bottom surface of the detection plate;

[0027] Figure 3 This is a schematic diagram of the structure when the end face to be tested is a horizontal plane and it is in contact with a horizontal temperature detection surface.

[0028] Figure 4 This is a schematic diagram of the structure when the end face to be tested is an inclined surface and is in contact with a horizontal temperature detection surface;

[0029] Figure 5 The tilt angle of the end face to be tested is less than Figure 4 The diagram shows the structure when the end face to be tested contacts the horizontal temperature detection surface at the tilt angle.

[0030] Reference numerals: 1-base, 2-rubber plate, 3-top pressure plate, 4-horizontal temperature detection surface, 5-heat conducting ring, 6-bracket, 7-detection plate, 8-motor, 9-telescopic cylinder, 10-end face to be detected, 11-valve body, 12-top pressure cylinder, 13-temperature sensor. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0032] A gas valve end face tilt detection device includes a base 1 for mounting a valve body 11. The valve body 11 is horizontally mounted on the base 1, and the end face 10 to be tested of the valve body 11 is vertically upward. A detection component is provided above the valve body 11. The detection component forms a horizontal temperature detection surface 4 corresponding to the end face 10 to be tested. Several temperature sensors 13 are radially distributed along the horizontal temperature detection surface 4. The horizontal temperature detection surface 4 contacts and rotates with the end face 10 to be tested. The temperature sensors 13 measure the temperature of the horizontal temperature detection surface 4 radially from the edge to the center during the rotation process in real time. If only the temperature of the edge area rises, the end face 10 to be tested is determined to be tilted. If the temperature of all areas from the edge to the center rises synchronously, the end face 10 to be tested is determined to be horizontal.

[0033] In this embodiment, the detection device of the present invention is designed based on the fundamental principle that friction between two objects generates heat, and that heat is transferred between the two objects. Figure 1 As shown, the valve body 11 to be tested is mounted on the base 1, with the end face 10 to be tested of the valve body 11 facing vertically upwards. The valve body 11 is installed horizontally. The horizontal temperature sensing surface 4 of the upper detection component contacts the end face 10 to be tested. When the horizontal temperature sensing surface 4 is not rubbing against the end face 10, all temperature sensors 13 detect the same temperature value. The horizontal temperature sensing surface 4 rotates and rubs against the end face 10 to be tested, generating heat and causing the temperature at the contact point between the horizontal temperature sensing surface 4 and the end face 10 to rise. The end face 10 to be tested is a circular surface. If the end face to be tested... 10 is an inclined surface. When the horizontal temperature detection surface 4 contacts it, if the end face 10 to be tested is inclined, then only one edge area of ​​the end face 10 to be tested can contact the horizontal temperature detection surface 4. There is a certain angle between the end face to be tested and the horizontal temperature detection surface 4. The larger the inclination angle, the larger the angle and the smaller the area in contact with the horizontal temperature detection surface 4. Conversely, the smaller the angle, the larger the area in contact with the horizontal temperature detection surface 4. If the end face 10 to be tested is horizontal, it is equivalent to being parallel to the horizontal temperature detection surface 4. Then the horizontal temperature detection surface 4 and the end face 10 to be tested are in complete contact.

[0034] Therefore, when the horizontal temperature sensing end face rotates, as Figure 4 As shown, if the end face 10 to be tested is an inclined surface, then only the higher end of the end face 10 to be tested contacts the horizontal temperature detection surface 4. That is, the edge region of the horizontal temperature detection surface 4 can rub against the end face 10 to generate heat. This rotational friction causes the temperature of the edge region of the horizontal temperature detection surface 4 to rise. The temperature sensor 13 of the edge region will detect the temperature rise of the edge region of the horizontal temperature detection surface 4, thereby determining that the end face 10 to be tested is an inclined surface. Figure 5As shown, if the temperature sensor 13 on the edge towards the center also detects a temperature increase, it can be determined that the tilt of the end face 10 to be detected is small.

[0035] If the end face 10 to be tested is a horizontal plane, such as Figure 3 As shown, the end face 10 to be tested is in complete contact with the horizontal temperature detection surface 4. The entire area from the edge to the center of the horizontal temperature detection surface 4 generates heat through friction with the end face 10. This rotational friction causes the temperature of the area from the edge to the center of the horizontal temperature detection surface 4 to rise, and all temperature sensors 13 in this area simultaneously detect the temperature increase, thus determining that the end face 10 to be tested is horizontal. Therefore, this invention can effectively detect whether the valve mating end face is tilted, ensuring stronger sealing of the connection end face when the valve body 11 is connected to the pipeline, reducing the risk of gas leakage.

[0036] The principle of this detection device does not depend on the specific size of the valve. As long as the horizontal temperature detection surface 4 can effectively contact and rotate with the end face 10 to be tested, the tilt of the end face of gas valves of different sizes can be detected, which has strong versatility and adaptability.

[0037] It can detect valves made of various materials. Regardless of whether the valve body 11 is made of metal, plastic or other materials, as long as there is heat conduction, the detection device can perform detection based on the principle of heat conduction. It is suitable for gas valves made of various materials.

[0038] Furthermore, the detection assembly includes a circular detection plate 7, a driving component for rotating the detection plate 7, and a telescopic cylinder 9 for adjusting the height of the driving component. The telescopic cylinder 9 is mounted on a bracket 6 above the base 1. The telescopic end of the telescopic cylinder 9 is connected to the driving component. The output shaft of the driving component is connected to the center of the top surface of the detection plate 7. A heat-conducting part is provided horizontally on the bottom surface of the detection plate 7. The bottom surface of the heat-conducting part forms the horizontal temperature detection surface 4. Temperature sensors 13 are distributed inside the heat-conducting part.

[0039] Specifically, after the valve body 11 is installed, the telescopic cylinder 9 drives the detection plate 7 to move downward until the bottom surface of the heat-conducting part contacts the end face 10 to be detected. The heat-conducting part can transfer the heat generated by friction to the temperature sensing end of the temperature sensor 13, which is beneficial for the temperature sensor 13 to quickly detect the temperature change of the heat-conducting part.

[0040] Furthermore, the heat-conducting part has a cavity inside, and the temperature sensor 13 is bonded to the bottom wall of the cavity, with the temperature sensing end of the temperature sensor 13 in contact with the heat-conducting part.

[0041] Furthermore, the temperature sensors 13 are distributed within the radius or diameter range of the detection plate 7.

[0042] Specifically, the temperature sensor 13 is fixed inside the cavity by adhesive bonding. The sensing end of the temperature sensor 13 is in direct contact with the heat-conducting part, i.e., in contact with the bottom wall of the cavity. The bottom wall of the cavity is relatively thin, which facilitates rapid heat transfer. Since the entire detection plate 7 is to rotate, only a number of temperature sensors 13 need to be set within the radius or diameter of the detection plate 7 to achieve detection. All temperature sensors 13 are located on the same straight line. Each sensor can be labeled, which makes it easy to record the position of the temperature sensor 13, thereby facilitating the determination of the position on the horizontal temperature detection surface 4 from which the temperature value detected by the temperature sensor 13 originates. The temperature sensor 13 can adopt a built-in wireless transmission type, which eliminates the need for wire connections.

[0043] When the end face 10 to be tested is inclined, only the higher end of the end face 10 can contact the horizontal temperature detection surface 4. That is, only the bottom surface of the outer one or two heat-conducting rings 5 ​​can contact the end face 10 to be tested. The greater the inclination, the fewer heat-conducting rings 5 ​​will contact each other; the smaller the inclination, the more heat-conducting rings 5 ​​will contact each other. When it is horizontal, all the bottom surfaces of the heat-conducting rings 5 ​​can contact each other. The temperature sensor 13 will only collect the temperature value transmitted by the heat-conducting rings 5 ​​that are in contact with the end face 10 to be tested. That is, from the edge to the center, the more temperature sensors 13 that can detect the temperature rise, the smaller the inclination of the end face 10 to be tested. According to the actual needs of the valve body 11, within the radius, if more than half of the temperature sensors 13 can detect the temperature rise at the same time, it means that the inclination of the end face 10 to be tested meets the requirements. Conversely, if less than half of the temperature sensors 13 can detect the temperature rise, it means that the inclination is too large, the end face of the valve body 11 does not meet the requirements, and there is a risk of air leakage. The specific number of temperature sensors 13 required to detect a temperature rise depends on the actual needs. Alternatively, all temperature sensors 13 can detect a temperature rise simultaneously to determine that the valve end face is qualified. The more temperature sensors 13 and the more heat-conducting rings 5 ​​there are, the higher the detection accuracy will be.

[0044] Furthermore, the heat-conducting part includes a plurality of hollow heat-conducting rings 5, which are arranged in a concentric ring on the bottom surface of the detection plate 7, and the bottom surfaces of the plurality of heat-conducting rings 5 ​​are located on the same horizontal plane.

[0045] Specifically, the heat-conducting part is fixed on the bottom surface of the detection plate 7. The heat-conducting part is a heat-conducting ring 5 made of thin-walled heat-conducting plate. The heat-conducting ring 5 is distributed in a concentric ring shape on the bottom surface of the detection plate 7. The bottom surfaces of several heat-conducting rings 5 ​​are in the same horizontal plane, that is, the bottom surfaces of several heat-conducting rings 5 ​​together form a horizontal temperature detection surface 4. The temperature sensor 13 is set in the heat-conducting ring 5.

[0046] Furthermore, the heat-conducting rings 5 ​​are evenly spaced, and the bottom end of the heat-conducting rings 5 ​​is arc-shaped.

[0047] Specifically, such as Figure 2 As shown, several heat-conducting rings 5 ​​are distributed at intervals, so that there is a small gap between two adjacent heat-conducting rings 5. The gap can be set at the millimeter level. Due to frictional heat generation, the heat-conducting rings 5 ​​can transfer temperature. After being separated, temperature interference between two adjacent heat-conducting rings 5 ​​can be avoided. That is, the heat-conducting rings 5 ​​that are not in contact with the end face 10 to be tested may also have their temperature rise due to heat conduction, thus affecting the final judgment.

[0048] The bottom of the heat-conducting ring 5 is arc-shaped, which can reduce damage to the end face 10 to be tested when rotating.

[0049] Furthermore, the driving component is a motor 8, which is vertically fixed to the telescopic end of the telescopic cylinder 9.

[0050] Furthermore, the base 1 is provided with top pressing components located on both sides of the valve body 11, which fix the valve body 11 to the base 1.

[0051] Furthermore, the top pressure assembly includes a top pressure cylinder 12 and a top pressure plate 3. The top pressure cylinder 12 is fixed on the base 1 and arranged in a cross shape. The top pressure plate 3 is fixed to the telescopic end of the top pressure cylinder 12. A rubber plate 2 is provided on the side of the top pressure plate 3 opposite to the valve body 11.

[0052] A method for detecting the inclination of the end face of a gas valve includes the following steps;

[0053] S1: After cleaning the end face 10 of the valve body 11 to be tested, place it on the base 1, so that the end face 10 of the valve body 11 to be tested is vertically upward, and fix the valve body 11 from four directions by the top pressing component; after the valve body 11 is installed, the levelness of the valve body 11 can be checked by a spirit level to ensure the accuracy of the test results.

[0054] S2: Measure the levelness of the detection plate 7 with a spirit level to ensure that the horizontal temperature detection surface 4 is in a horizontal state. The telescopic cylinder 9 drives the motor 8 to move downward so that the horizontal temperature detection surface 4 contacts the end face 10 to be tested.

[0055] S3: The motor 8 rotates, the horizontal temperature detection surface 4 rubs against the end face 10 to be detected, and the heat-conducting ring 5 in contact with the end face 10 to be detected heats up. The temperature sensor 13 measures the temperature of the heat-conducting ring 5 in each area along the radial direction of the detection plate 7. If only the temperature of the edge area rises, the end face 10 to be detected is determined to be an inclined surface. If the temperature of all areas from the edge to the center rises synchronously, the end face 10 to be detected is determined to be a horizontal surface.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Based on the technical essence of the present invention, any simple modifications, equivalent substitutions, and improvements made to the above embodiments within the spirit and principles of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A device for detecting the inclination of a gas valve end face, comprising a base (1) for mounting a valve body (11), characterized in that, The valve body (11) is horizontally mounted on the base (1), and the end face (10) to be tested of the valve body (11) is vertically upward. A detection component is provided above the valve body (11). The detection component forms a horizontal temperature detection surface (4) corresponding to the end face (10) to be tested. Several temperature sensors (13) are distributed radially along the horizontal temperature detection surface (4). The horizontal temperature detection surface (4) contacts and rotates with the end face (10) to be tested. The temperature sensor (13) measures the temperature of the horizontal temperature detection surface (4) radially from the edge to the center during the rotation process in real time. If only the temperature of the edge area rises, the end face (10) to be tested is judged to be an inclined surface. If the temperature of all areas from the edge to the center rises synchronously, the end face (10) to be tested is judged to be a horizontal surface.

2. The gas valve end face inclination detection device according to claim 1, characterized in that, The detection assembly includes a circular detection plate (7), a drive component for rotating the detection plate (7), and a telescopic cylinder (9) for adjusting the height of the drive component. The telescopic cylinder (9) is mounted on a bracket (6) above the base (1). The telescopic end of the telescopic cylinder (9) is connected to the drive component. The output shaft of the drive component is connected to the center of the top surface of the detection plate (7). The bottom surface of the detection plate (7) is provided with a heat-conducting part, and the bottom surface of the heat-conducting part constitutes the horizontal temperature detection surface (4). Temperature sensors (13) are distributed in the heat-conducting part.

3. The gas valve end face inclination detection device according to claim 2, characterized in that, The heat-conducting part has a cavity inside, and the temperature sensor (13) is bonded to the bottom wall of the cavity. The temperature sensing end of the temperature sensor (13) is in contact with the heat-conducting part.

4. The gas valve end face inclination detection device according to claim 3, characterized in that, The temperature sensors (13) are distributed within the radius or diameter range of the detection plate (7).

5. A gas valve end face inclination detection device according to claim 4, characterized in that, The heat-conducting part includes a plurality of hollow heat-conducting rings (5), which are arranged in concentric rings on the bottom surface of the detection plate (7), and the bottom surfaces of the plurality of heat-conducting rings (5) are located on the same horizontal plane.

6. The gas valve end face inclination detection device according to claim 5, characterized in that, Several heat-conducting rings (5) are evenly spaced, and the bottom end of the heat-conducting rings (5) is arc-shaped.

7. A gas valve end face inclination detection device according to claim 6, characterized in that, The driving component is a motor (8), which is vertically fixed to the telescopic end of the telescopic cylinder (9).

8. A gas valve end face inclination detection device according to claim 7, characterized in that, The base (1) is provided with top pressure components located on both sides of the valve body (11), and the top pressure components fix the valve body (11) on the base (1).

9. A gas valve end face inclination detection device according to claim 8, characterized in that, The top pressure assembly includes a top pressure cylinder (12) and a top pressure plate (3). The top pressure cylinder (12) is fixed on the base (1) and arranged in a cross shape. The top pressure plate (3) is fixed to the telescopic end of the top pressure cylinder (12). A rubber plate (2) is provided on the side of the top pressure plate (3) opposite to the valve body (11).

10. A detection method for the gas valve end face inclination detection device as described in claim 9, characterized in that, Includes the following steps; S1: After cleaning the test end face (10) of the valve body (11) to be tested, place it on the base (1) so that the test end face (10) of the valve body (11) is vertically upward and fix the valve body (11) from four directions by the top pressure assembly. S2: Measure the level of the test plate (7) with a level ruler to ensure that the horizontal temperature test surface (4) is in a horizontal state. The telescopic cylinder (9) drives the motor (8) to move downward so that the horizontal temperature test surface (4) contacts the end face (10) to be tested. S3: The motor (8) rotates, the horizontal temperature detection surface (4) rubs against the end face (10) to be tested, the heat-conducting ring (5) in contact with the end face (10) to be tested heats up, the temperature sensor (13) measures the temperature of the heat-conducting ring (5) in each area along the radial direction of the detection plate (7), if only the temperature of the edge area rises, the end face (10) to be tested is judged to be an inclined surface, if the temperature of all areas from the edge to the center rises synchronously, the end face (10) to be tested is judged to be a horizontal surface.

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