Compressed natural gas pressure reducing valve for vehicle

Abstract

The utility model relates to the technical field of natural gas pressure reduction, in particular to an automotive compressed natural gas pressure reducing valve which comprises a protection frame, fixing nuts are arranged on the surface of the protection frame, holes are formed in the surface of the protection frame, and exhaust pipes are arranged at the two ends of the protection frame. A thin film is arranged in the sealing frame, an external spring is arranged on the surface of the thin film, and a force application plate is arranged at one end of the external spring; the natural gas conveying device has the beneficial effects that by rotating the adjusting screw rod, the pressure applied by the adjusting screw rod to the external spring is set to a specified value in advance, then the natural gas is conveyed into the sealing frame through the gas inlet pipe, and when the natural gas in the sealing frame reaches a certain amount, the film protrudes upwards, so that the gas conveying pipe is sealed through the sealing block; and if the pressure in the sealing frame exceeds the maximum value, the protruding degree of the film is larger through the pressure in the sealing frame, so that internal redundant natural gas is discharged from the hole, and a pressure sensor is arranged on the surface of the pressure reducing valve, so that the pressure in the device can be fed back to a vehicle electronic element.

Description

Technical Field

[0001] The utility model relates to the field of natural gas pressure reduction, in particular to a compressed natural gas pressure reducing valve for vehicles. Background Art

[0002] As a key component of the energy supply system of natural gas vehicles, the performance of the automotive compressed natural gas pressure reducing valve directly affects the vehicle's power output, fuel efficiency and driving safety. The pressure reducing valve ensures a stable supply of gas by precisely adjusting the pressure of the natural gas output from the high-pressure gas cylinder to a level suitable for engine operation. It involves the safe decompression of high-pressure gas and realizes dynamic pressure management. In addition, the built-in filtering and safety release functions further enhance the reliability and durability of the system. Therefore, an efficient, sensitive and reliable natural gas pressure reducing valve can significantly improve the vehicle's operating economy, reduce emission pollution, and ensure the safety of the driving process, reflecting its important role in promoting the development of clean energy vehicles.

[0003] In the existing technology, traditional compressed natural gas pressure reducing valves for vehicles have a relatively simple structure, mainly including a sturdy cast iron or copper shell, a manual adjustment screw, a spring-loaded pressure reducing diaphragm, and a single-stage or multi-stage pressure regulation system. This type of pressure reducing valve maintains a constant downstream pressure through manually preset spring force. The diaphragm senses pressure changes and then drives the valve core to open and close to adjust the airflow, thereby providing a reliable energy supply for natural gas vehicles.

[0004] However, when using a traditional vehicle CNG pressure reducing valve, it is necessary to check the internal pressure of the valve. Frequent attempts to check the internal pressure of the vehicle CNG pressure reducing valve may inadvertently damage the valve body seal, introduce external impurities, cause inaccurate pressure control, and even cause gas leakage, which in serious cases endangers the safety of the vehicle and the life of the user. Therefore, the utility model proposes a vehicle CNG pressure reducing valve to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of the present utility model is to provide a vehicle-use compressed natural gas pressure reducing valve to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a compressed natural gas pressure reducing valve for a vehicle, comprising: a protective frame, a fixing nut provided on the surface of the protective frame, a hole formed on the surface of the protective frame, and exhaust pipes provided at both ends of the protective frame;

[0007] A sealing frame is provided with a film in the sealing frame, an external spring is provided on the surface of the film, and a force applying plate is provided at one end of the external spring.

[0008] Preferably, connecting pipes are provided at both ends of the protective frame, an "L"-shaped hole is provided on the surface of the connecting pipe, an exhaust pipe is provided directly above the hole, a connecting block is provided on the side of the protective frame, a pressure sensor is provided on the surface of the connecting block, an "L"-shaped hole is provided in the connecting block, an air connecting pipe is provided directly in front of the hole, an air inlet pipe is provided on the side of the protective frame, and a fixing screw is provided on the surface of the protective frame.

[0009] Preferably, the sealing frame is in a cylindrical structure as a whole, an exhaust hole is provided on the surface of the sealing frame, an air inlet pipe is provided on the surface of the sealing frame, an air connection pipe is provided on the surface of the sealing frame, and a fixing groove is provided on the inner side surface of the sealing frame.

[0010] Preferably, a hole is opened on the surface of the film, a transmission rod is arranged in the hole, a gasket is arranged on the surface of the film, an external spring is arranged on the surface of the gasket, a fixed block is arranged on the periphery of the film, and a fixed block is clamped in the fixing groove.

[0011] Preferably, an adjusting screw is provided in the fixing nut, a force plate is provided at one end of the adjusting screw, a positioning tube is provided on the inner surface of the protective frame, an external spring is provided in the positioning tube, a transmission rod is provided in the external spring, an internal spring is provided on the surface of the transmission rod, a positioning block is provided at one end of the transmission rod, a fixing block is provided on the side of the fixing nut, and an exhaust pipe is provided on the surface of the fixing block.

[0012] Preferably, a rotating rod is provided on the surface of the positioning block, a hole is opened at one end of the rotating rod, a connecting rod is provided in the hole, a fixing block is stuck in the rotating rod, a sealing block is provided at one end of the rotating rod, an air supply pipe is provided directly below the sealing block, and an air inlet pipe is provided at one end of the air supply pipe.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The vehicle compressed natural gas pressure reducing valve proposed by the utility model can, when in use, set the pressure of the external spring applied by the adjusting screw to a specified size in advance by rotating the adjusting screw, and then the gas inlet pipe transmits the natural gas to the transmission sealing frame. Since the film is a material with good ductility, when the natural gas in the sealing frame reaches a certain amount, the force of the external spring will be less than the internal pressure of the sealing frame, and the film will bulge upward, causing the transmission rod to move upward, thereby causing the sealing block to seal the gas transmission pipe. When the internal pressure of the sealing frame decreases, the sealing block will open again. If the pressure inside the sealing frame exceeds the maximum value, the pressure inside the sealing frame will cause the film to bulge more, thereby causing excess natural gas inside to be discharged from the hole, and the discharged natural gas is discharged from the exhaust hole and then discharged out of the equipment through the exhaust pipe. In addition, a pressure sensor is provided on the surface of the pressure reducing valve, which can feed back the internal pressure of the device to the vehicle's electronic components, so that the driver can check the condition of the vehicle compressed natural gas pressure reducing valve at any time to avoid safety accidents caused by the pressure reducing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the overall internal structure of the pressure reducing valve of the utility model;

[0017] Figure 3 This is a schematic diagram of the overall structure of the sealing frame of the utility model;

[0018] Figure 4 This is a schematic diagram of the overall structure of the transmission rod of the utility model;

[0019] Figure 5 This is a cross-sectional view of the overall structure of the utility model.

[0020] In the figure: 1. Protective frame; 2. Fixing nut; 3. Exhaust pipe; 4. Sealing frame; 5. Film; 6. External spring; 7. Force plate; 8. Connecting pipe; 9. Connecting block; 10. Air pipe; 11. Air inlet pipe;

[0021] 12. Fixing groove; 13. Fixing screw; 14. Transmission rod; 15. Gasket; 16. Pressure sensor; 17. Fixing block; 18. Adjusting screw; 19. Built-in spring; 20. Positioning block; 21. Rotating rod; 22. Connecting rod; 23. Fixing block; 24. Sealing block; 25. Air pipe; 26. Exhaust hole. DETAILED DESCRIPTION

[0022] In order to clearly and completely describe the purpose and technical solution of the present invention and make its advantages more clearly understood, the following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figure 1-Figure 5 The utility model provides a technical solution: a compressed natural gas pressure reducing valve for a vehicle, comprising: a protective frame 1, a fixing nut 2 is provided on the surface of the protective frame 1, a hole is opened on the surface of the protective frame 1, and exhaust pipes 3 are provided at both ends of the protective frame 1;

[0024] A sealing frame 4 is provided with a film 5 in the sealing frame 4, an external spring 6 is provided on the surface of the film 5, and a force applying plate 7 is provided at one end of the external spring 6;

[0025] During use, the pressure applied to the external spring 6 by the adjusting screw 18 can be set to a specified size in advance by rotating the adjusting screw 18, and then the gas inlet pipe 11 transmits the natural gas to the transmission sealing frame 4. Since the film 5 is a material with good ductility, when the natural gas in the sealing frame 4 reaches a certain amount, the force of the external spring 6 will be less than the internal pressure of the sealing frame 4, and the film 5 will bulge upward, causing the transmission rod 14 to move upward, so that the sealing block 24 seals the gas transmission pipe 25. When the internal pressure of the sealing frame 4 decreases, the sealing block 24 will open again. If the pressure inside the sealing frame 4 exceeds the maximum value, the pressure inside the sealing frame 4 will cause the film 5 to bulge more, so that the excess natural gas inside is discharged from the hole, and the discharged natural gas is discharged from the exhaust hole 26 and then discharged out of the equipment through the exhaust pipe 3. In addition, a pressure sensor 16 is provided on the surface of the pressure reducing valve, which can feed back the internal pressure of the device to the vehicle electronic components, so that the driver can check the condition of the vehicle compressed natural gas pressure reducing valve at any time to avoid safety accidents caused by the pressure reducing valve.

[0026] Example 2: On the basis of Example 1, a pressure sensor 16 is provided so that the driver can view the internal situation of the pressure reducing valve in real time on the vehicle. A connecting block 9 is provided on the surface of the pressure sensor 16. Connecting pipes 8 are provided at both ends of the protective frame 1. An "L"-shaped hole is opened on the surface of the connecting pipe 8. An exhaust pipe 3 is provided directly above the hole. A connecting block 9 is provided on the side of the protective frame 1. An "L"-shaped hole is opened in the connecting block 9. An air connection pipe 10 is provided directly in front of the hole. An air inlet pipe 11 is provided on the side of the protective frame 1. A fixing screw 13 is provided on the surface of the protective frame 1.

[0027] In order to ensure that the driver can check the internal situation of the pressure reducing valve in real time in the car, the pressure sensor 16 is connected to the electronic components in the car, and the data detected by the pressure sensor 16 is transmitted to the car system in real time, so that the car owner can check the internal situation of the pressure reducing valve at any time.

[0028] Example 3: Based on Example 2, in order to ensure the normal operation of the vehicle compressed natural gas pressure reducing valve, a sealing frame 4 is provided. The sealing frame 4 is generally cylindrical in structure. An exhaust hole 26 is provided on the surface of the sealing frame 4. An air inlet pipe 11 is provided on the surface of the sealing frame 4. An air connection pipe 10 is provided on the surface of the sealing frame 4. A fixing groove 12 is provided on the inner side of the sealing frame 4.

[0029] A hole is opened on the surface of the film 5, a transmission rod 14 is set in the hole, a gasket 15 is set on the surface of the film 5, an external spring 6 is set on the surface of the gasket 15, a fixed block 17 is set on the periphery of the film 5, and the fixed block 17 is clamped in the fixing groove 12;

[0030] An adjusting screw 18 is provided in the fixing nut 2, a force applying plate 7 is provided at one end of the adjusting screw 18, a positioning tube is provided on the inner surface of the protective frame 1, an external spring 6 is provided in the positioning tube, a transmission rod 14 is provided in the external spring 6, an internal spring 19 is provided on the surface of the transmission rod 14, a positioning block 20 is provided at one end of the transmission rod 14, a fixing block 23 is provided on the side of the fixing nut 2, and an exhaust pipe 3 is provided on the surface of the fixing block 23;

[0031] A rotating rod 21 is provided on the surface of the positioning block 20. A hole is opened at one end of the rotating rod 21, and a connecting rod 22 is provided in the hole. A fixing block 23 is clamped in the rotating rod 21. A sealing block 24 is provided at one end of the rotating rod 21. An air supply pipe 25 is provided just below the sealing block 24. An air inlet pipe 11 is provided at one end of the air supply pipe 25.

[0032] In order to ensure the normal operation of the vehicle compressed natural gas pressure reducing valve, natural gas is transported to the gas connecting pipe 10 through the gas pipe 25. When the natural gas inside the sealing frame 4 reaches a certain value, the sealing block 24 located at one end of the rotating rod 21 will seal the gas pipe 25. When the pressure of the natural gas inside the sealing frame 4 decreases due to use and consumption, the sealing block 24 will open again. When the natural gas pressure in the sealing frame 4 exceeds the safe value, the natural gas will be discharged from the holes on the surface of the film 5, and the discharged natural gas will be discharged outside the equipment through the exhaust pipe 3, thereby ensuring the safe operation of the vehicle compressed natural gas pressure reducing valve when the vehicle is driving.

[0033] In actual use, the pressure applied to the external spring 6 by the adjusting screw 18 can be set to a specified size in advance by rotating the adjusting screw 18, and then the gas inlet pipe 11 transmits the natural gas to the transmission sealing frame 4. Since the film 5 is a material with good ductility, when the natural gas in the sealing frame 4 reaches a certain amount, the force of the external spring 6 will be less than the internal pressure of the sealing frame 4, and the film 5 will bulge upward, causing the transmission rod 14 to move upward, so that the sealing block 24 seals the gas transmission pipe 25. When the internal pressure of the sealing frame 4 decreases, the sealing block 24 will open again. If the pressure inside the sealing frame 4 exceeds the maximum value, the pressure inside the sealing frame 4 will cause the film 5 to bulge more, so that the excess natural gas inside is discharged from the hole, and the discharged natural gas is discharged from the exhaust hole 26 and then discharged out of the equipment through the exhaust pipe 3. In addition, a pressure sensor 16 is provided on the surface of the pressure reducing valve, which can feed back the internal pressure of the device to the vehicle electronic components, so that the driver can check the status of the vehicle compressed natural gas pressure reducing valve at any time to avoid safety accidents caused by the pressure reducing valve.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A compressed natural gas pressure reducing valve for vehicles, characterized by: The vehicle-use compressed natural gas pressure reducing valve comprises: a protection frame (1), a fixing nut (2) is provided on the surface of the protection frame (1), a hole is opened on the surface of the protection frame (1), and exhaust pipes (3) are provided at both ends of the protection frame (1); A sealing frame (4) is provided with a film (5) in the sealing frame (4), an external spring (6) is provided on the surface of the film (5), and a force application plate (7) is provided at one end of the external spring (6).

2. A vehicle-use compressed natural gas pressure reducing valve according to claim 1, characterized in that: The protective frame (1) is provided with connecting pipes (8) at both ends, an "L"-shaped hole is provided on the surface of the connecting pipe (8), an exhaust pipe (3) is provided just above the hole, a connecting block (9) is provided on the side of the protective frame (1), a pressure sensor (16) is provided on the surface of the connecting block (9), an "L"-shaped hole is provided in the connecting block (9), an air connection pipe (10) is provided just in front of the hole, an air inlet pipe (11) is provided on the side of the protective frame (1), and a fixing screw (13) is provided on the surface of the protective frame (1).

3. The vehicle-use compressed natural gas pressure reducing valve according to claim 1, characterized in that: The sealing frame (4) is in a cylindrical structure as a whole. An exhaust hole (26) is provided on the surface of the sealing frame (4). An air inlet pipe (11) is provided on the surface of the sealing frame (4). An air connection pipe (10) is provided on the surface of the sealing frame (4). A fixing groove (12) is provided on the inner side surface of the sealing frame (4).

4. The vehicle-use compressed natural gas pressure reducing valve according to claim 1, characterized in that: A hole is provided on the surface of the film (5), a transmission rod (14) is provided in the hole, a gasket (15) is provided on the surface of the film (5), an external spring (6) is provided on the surface of the gasket (15), a fixed block (17) is provided on the periphery of the film (5), and the fixed block (17) is clamped in the fixed groove (12).

5. The vehicle-use compressed natural gas pressure reducing valve according to claim 1, characterized in that: An adjusting screw (18) is provided in the fixing nut (2), a force application plate (7) is provided at one end of the adjusting screw (18), a positioning tube is provided on the inner surface of the protection frame (1), an external spring (6) is provided in the positioning tube, a transmission rod (14) is provided in the external spring (6), an internal spring (19) is provided on the surface of the transmission rod (14), a positioning block (20) is provided at one end of the transmission rod (14), a fixing block (23) is provided on the side of the fixing nut (2), and an exhaust pipe (3) is provided on the surface of the fixing block (23).

6. A compressed natural gas pressure reducing valve for vehicles according to claim 5, characterized in that: A rotating rod (21) is provided on the surface of the positioning block (20), a hole is provided at one end of the rotating rod (21), a connecting rod (22) is provided in the hole, a fixing block (23) is clamped in the rotating rod (21), a sealing block (24) is provided at one end of the rotating rod (21), an air supply pipe (25) is provided just below the sealing block (24), and an air inlet pipe (11) is provided at one end of the air supply pipe (25).

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