Gas pressure reducing valve capable of realizing self-closing in case of failure

Abstract

The utility model relates to the field of compressed gas pressure reducing devices, and discloses a gas pressure reducing valve capable of realizing fault self-closing, which comprises a valve body, a supporting component is arranged at the bottom of the valve body, one side of the outer wall of the valve body is fixedly connected with a gas inlet pipe, and the other side of the outer wall of the valve body is fixedly connected with a gas outlet pipe. The outer wall of the air inlet pipe and the outer wall of the air outlet pipe are fixedly connected with connecting flanges, the tops of the connecting flanges are fixedly connected with an air pressure meter, the interior of the air outlet pipe is fixedly connected with an air pressure detector, the upper surface of the air pressure detector is fixedly connected with a movable inclined plate, and the interior of the valve body is fixedly connected with an inner valve plate. According to the gas pressure reducing valve, normal operation is achieved through the valve body, the gas inlet pipe and the gas outlet pipe, the problem that the gas pressure reducing valve cannot be rapidly, effectively and automatically closed in the fault state is solved, the pressure reducing valve is rapidly closed, and therefore damage to equipment, pipelines and the surrounding environment due to high-pressure gas leakage can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of compressed gas pressure reducing devices, in particular to a gas pressure reducing valve capable of realizing self-closing in case of failure. Background Art

[0002] A gas pressure reducing valve is a safety device used in pipeline systems. Its main function is to reduce the pressure of the gas in the pipeline to a safe level to protect the pipeline system from damage caused by excessive pressure. The pressure reducing valve controls the flow of gas by adjusting the opening of the valve to reduce the pressure. When the pressure in the pipeline exceeds the preset safety value, the pressure reducing valve will open to release the excess pressure; when the pressure drops below the safety value, the pressure reducing valve will close to maintain the stable pressure of the system. In industrial applications, the gas system may cause abnormal pressure increase due to various reasons (such as equipment failure, operating errors, etc.). If the pressure is too high, it may cause pipeline rupture, equipment damage or even explosion. A gas pressure reducing valve that can achieve fault self-closing can automatically close when these abnormal conditions are detected, thereby preventing catastrophic accidents.

[0003] After searching, a gas pressure reducing valve with a fault self-closing function is disclosed in the announcement number: CN205479567U, including a valve body, an air inlet channel, an air outlet channel, a breathing hole and a feedback channel are arranged on the valve body, a pressure reducing part is arranged between the air inlet channel and the air outlet channel, a pressure regulating part is arranged between the breathing hole and the feedback channel, a pressure regulating screw is connected to the valve body, and a pressure regulating seat is also arranged in the feedback channel; the pressure reducing part includes a pressure reducing valve core and a pressure reducing valve seat, the pressure reducing valve seat is a cylindrical structure with an external thread arranged on the outer side, and the pressure reducing valve seat is threadedly connected in the air inlet channel, the pressure reducing valve core is located in the air outlet channel, and the pressure reducing valve seat and the pressure reducing valve core are respectively provided with a groove and a protrusion with a conical cross-section, and the protrusion is opposite to the groove; a leak-plugging part is connected to the air inlet channel, the leak-plugging part includes an air inlet pipe, a baffle, and a steel ball, and a spherical groove is arranged on the baffle. The pressure reducing effect of the utility model is well controllable, the operation and maintenance costs are low, the troubleshooting is convenient, and the over-current self-cutoff can be realized. In this application, the pressure reducing effect is well controllable by cooperating with the gap between the pressure regulating seat and the feedback channel, and the self-flow cut-off is realized by structures such as steel balls. Such a setting will cause the gas pressure reducing valve to be unable to close automatically and quickly and effectively in a fault state, making it difficult to immediately stop the gas flow, and the pressure continues to rise, increasing the risk of pipeline rupture, equipment damage or explosion. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a gas pressure reducing valve that can achieve self-closing in the event of a fault, aiming to improve the problem that the gas pressure reducing valve cannot automatically close quickly and effectively in a fault state, making it difficult to immediately stop the gas flow, and the pressure continues to rise, increasing the risk of pipeline rupture, equipment damage or explosion.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a gas pressure reducing valve that can realize fault self-closing, comprising a valve body, a supporting assembly is arranged at the bottom of the valve body, an air inlet pipe is fixedly connected to one side of the outer wall of the valve body, an air outlet pipe is fixedly connected to the other side of the outer wall of the valve body, the outer walls of the air inlet pipe and the air outlet pipe are fixedly connected to a connecting flange, a pressure gauge is fixedly connected to the top of the connecting flange, an air pressure detector is fixedly connected to the inside of the air outlet pipe, a movable inclined plate is fixedly connected to the upper surface of the air pressure detector, an inner valve plate is fixedly connected to the inside of the valve body, a valve cover is arranged above the valve body, a piston rod is fixedly connected to the inside of the valve cover, one end of the piston rod is slidably connected to the inner wall of the inner valve plate, a main valve spring is sleeved on the top of the piston rod, one end of the main valve spring is fixedly connected to the inner wall of the valve cover, the other end of the main valve spring is fixedly connected to a sealing plate, and the outer wall of the sealing plate is fixedly connected to the inner wall of the valve cover.

[0006] Through the above technical scheme, the gas pressure reducing valve is first fixed in an appropriate position through the connecting flange, and air is introduced into the valve body through the air inlet pipe and then discharged through the air outlet pipe. When the gas flows through the air outlet pipe, pressure is applied to the internal movable inclined plate. The inclined plate slides between the air outlet pipe and the air pressure detector, applying pressure to the air pressure detector. The air pressure detector monitors the pressure in real time. Once an abnormality is detected, the controller activates the actuator to move the piston rod in the valve body and fully fit with the inner valve plate, thereby realizing automatic closing of the pressure reducing valve and completing the air pressure detection and automatic closing functions.

[0007] Furthermore, the support assembly includes a fixed base, and the upper surface of the fixed base is fixedly connected to the bottom of the valve body.

[0008] Through the above technical solution, the gas pressure reducing valve is supported by the fixed base in the support assembly.

[0009] Furthermore, a mounting plate is fixedly connected to the lower surface of the valve cover, and the mounting plate is fitted to the valve body.

[0010] Through the above technical solution, the valve cover is positioned and fixed through the mounting plate.

[0011] Furthermore, the outer wall of the mounting plate is rotatably connected to a rotating ring, and the inner wall of the rotating ring is fixedly connected to an annular rack.

[0012] Through the above technical solution, the rotating ring is driven to make the annular rack rotate inside the mounting plate.

[0013] Furthermore, a gear is rotatably connected inside the mounting plate, and the gear is meshed with an annular rack.

[0014] Through the above technical solution, the rotation of the annular rack drives the rotation of multiple gears.

[0015] Furthermore, the internal thread of the gear is connected with a bolt, and the outer wall of the bolt is threadedly connected to the inside of the mounting plate and the valve body.

[0016] Through the above technical solution, the rotation of the gear drives the bolt to move inside the mounting plate and the valve body.

[0017] Furthermore, a telescopic rod is fixedly connected to the interior of the mounting plate, and a telescopic spring is sleeved on the outer wall of the telescopic rod.

[0018] Through the above technical solution, the telescopic spring is guided by the telescopic rod to prevent deviation.

[0019] Furthermore, one end of the telescopic spring is fixedly connected to the inside of the mounting plate, the other end of the telescopic spring is fixedly connected to a sealing ring, and the outer wall of the sealing ring is slidably connected to the inside of the mounting plate and the valve body.

[0020] Through the above technical solution, the sealing ring is pushed to fit the valve body by the extension of the telescopic spring, thereby achieving efficient sealing.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, firstly, normal operation is achieved through the valve body, the air inlet pipe and the air outlet pipe, and the air pressure is detected in cooperation with the movable inclined plate and the air pressure detector. Then, the piston rod is driven to slide on the inner wall of the inner valve plate in cooperation with the main valve spring and the sealing plate through the controller on one side and the actuator on the top to achieve rapid closure, thereby solving the problem that the gas pressure reducing valve cannot be automatically closed quickly and effectively under a fault state, and achieving rapid closure of the pressure reducing valve, thereby reducing the damage to equipment, pipelines and the surrounding environment due to leakage of high-pressure gas.

[0023] 2. In the utility model, firstly, the rotating ring is driven to rotate on the outer wall of the mounting plate, and then the upper valve cover is disassembled and assembled by cooperating with the annular rack, gears and bolts, and then the sealing ring, telescopic rod and telescopic spring are cooperated to realize the efficient sealing between the valve cover and the valve body, so that the rapid disassembly and assembly of the valve cover can simplify the maintenance and repair process, save time and effectively seal to prevent air leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional structural schematic diagram of a gas pressure reducing valve that can achieve self-closing in case of failure, which is proposed by the utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of a valve body of a gas pressure reducing valve that can achieve self-closing in case of failure, which is proposed by the utility model;

[0026] Figure 3This is a schematic diagram of the internal structure of a valve cover of a gas pressure reducing valve that can achieve self-closing when a fault occurs, as proposed by the utility model;

[0027] Figure 4 The utility model discloses a schematic diagram of the internal structure of a mounting plate of a gas pressure reducing valve capable of realizing self-closing in case of failure.

[0028] Legend:

[0029] 1. Valve body; 2. Fixed base; 3. Inlet pipe; 4. Outlet pipe; 5. Connecting flange; 6. Pressure gauge; 7. Pressure detector; 8. Inner valve plate; 9. Valve cover; 10. Piston rod; 11. Main valve spring; 12. Sealing plate; 13. Mounting plate; 14. Rotating ring; 15. Ring rack; 16. Gear; 17. Bolt; 18. Sealing ring; 19. Telescopic rod; 20. Telescopic spring; 21. Movable inclined plate. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0031] Reference Figure 1 - Figure 3 The utility model provides an embodiment: a gas pressure reducing valve capable of realizing self-closing in case of failure, comprising a valve body 1, a supporting assembly being arranged at the bottom of the valve body 1, an air inlet pipe 3 being fixedly connected to one side of the outer wall of the valve body 1, an air outlet pipe 4 being fixedly connected to the other side of the outer wall of the valve body 1, a connecting flange 5 being fixedly connected to the outer walls of the air inlet pipe 3 and the air outlet pipe 4, a barometer 6 being fixedly connected to the top of the connecting flange 5, an air pressure detector 7 being fixedly connected to the inside of the air outlet pipe 4, an active inclined plate 21 being fixedly connected to the upper surface of the air pressure detector 7, and the valve body 1 being fixedly connected to the outer wall of the air inlet pipe 3 and the air outlet pipe 4. An inner valve plate 8 is fixedly connected inside, a valve cover 9 is arranged above the valve body 1, a piston rod 10 is fixedly connected inside the valve cover 9, one end of the piston rod 10 is slidably connected to the inner wall of the inner valve plate 8, a main valve spring 11 is sleeved on the top of the piston rod 10, one end of the main valve spring 11 is fixedly connected to the inner wall of the valve cover 9, the other end of the main valve spring 11 is fixedly connected to a sealing plate 12, the outer wall of the sealing plate 12 is fixedly connected to the inner wall of the valve cover 9, the supporting assembly includes a fixed base 2, the upper surface of the fixed base 2 is fixedly connected to the bottom of the valve body 1;

[0032] Specifically, first, the pressure reducing valve is fixed at the specified position of the pipeline using the connecting flanges 5 on both sides, and then the air is guided into the interior of the valve body 1 through the air inlet pipe 3. Inside the valve body 1, the gas flows through the air outlet pipe 4. During this process, the airflow generates pressure on the movable inclined plate 21 inside the air outlet pipe 4, pushing the movable inclined plate 21 to move between the air outlet pipe 4 and the air pressure detector 7, thereby applying pressure to the air pressure detector 7. The air pressure detector 7 monitors the gas pressure in real time. Once an airflow abnormality is detected, such as the pressure exceeds a safe range, the air pressure detector 7 will activate the controller connected to it, and the controller will then start the actuator, triggering the piston rod 10 to move inside the valve body 1. As the piston rod 10 moves, its outer wall fits tightly against the inner valve plate 8 inside the valve body 1, thereby cutting off the airflow and realizing the function of automatically closing the gas pressure reducing valve.

[0033] Reference Figure 1 and Figure 4 The lower surface of the valve cover 9 is fixedly connected with a mounting plate 13, the mounting plate 13 is fitted with the valve body 1, the outer wall of the mounting plate 13 is rotatably connected with a rotating ring 14, the inner wall of the rotating ring 14 is fixedly connected with an annular rack 15, the interior of the mounting plate 13 is rotatably connected with a gear 16, the gear 16 is meshed with the annular rack 15, the inner thread of the gear 16 is connected with a bolt 17, and the outer wall of the bolt 17 is threadedly connected to the mounting plate 13 and the inside of the valve body 1;

[0034] Specifically, first, the rotating ring 14 is rotated to drive the annular rack 15 to rotate along the outer wall of the mounting plate 13. Due to the meshing of the annular rack 15 and the gear 16, the gear 16 will rotate with the rotation of the annular rack 15. The rotation of the gear 16 will then drive the bolt 17 to move inside the mounting plate 13 and the valve body 1, thereby realizing the disassembly and installation of the valve cover 9 above the mounting plate 13. After completing the disassembly and installation of the valve cover 9, the maintenance personnel can inspect and maintain the internal structure of the valve to ensure the normal operation and long-term reliability of the pressure reducing valve.

[0035] Reference Figure 4 A telescopic rod 19 is fixedly connected to the interior of the mounting plate 13, and a telescopic spring 20 is sleeved on the outer wall of the telescopic rod 19. One end of the telescopic spring 20 is fixedly connected to the interior of the mounting plate 13, and the other end of the telescopic spring 20 is fixedly connected to a sealing ring 18. The outer wall of the sealing ring 18 is slidably connected to the interior of the mounting plate 13 and the valve body 1;

[0036] Specifically, during the installation of the valve cover 9, as the valve cover 9 is gradually put into place, the sealing ring 18 will be guided to a position in close contact with the valve body 1. During this process, the sealing ring 18 slides along the inner side of the mounting plate 13. At the same time, the telescopic spring 20 is compressed and begins to shrink. The shrinkage of the telescopic spring 20 generates a thrust, which pushes the sealing ring 18 tightly toward the valve body 1, thereby ensuring an efficient sealing effect at the interface between the valve cover 9 and the valve body 1.

[0037] Working principle: When it is necessary to use a gas pressure reducing valve that can achieve self-closing in case of failure, first install the gas pressure reducing valve at the required location through the connecting flanges 5 on both sides, then deliver air to the inside of the valve body 1 through the air inlet pipe 3, and then discharge it through the air outlet pipe 4. During this process, when the gas passes through the air outlet pipe 4, it will exert pressure on the movable inclined plate 21 inside the air outlet pipe 4, so that the movable inclined plate 21 slides inside the air outlet pipe 4 and the air pressure detector 7, thereby exerting pressure on the air pressure detector 7, and then the pressure is monitored in real time through the air pressure detector 7. When an abnormal airflow is detected, the actuator is turned on by the controller on the side of the air pressure detector 7, so that the piston rod 10 moves inside the valve body 1, and then the outer wall of the piston rod 10 is completely fitted with the inner valve plate 8 inside the valve body 1, achieving The effect of detecting the air pressure and automatically closing the gas pressure reducing valve is achieved. Then, the rotating ring 14 is driven to rotate on the outer wall of the mounting plate 13, thereby driving the annular rack 15 to rotate inside the mounting plate 13. Due to the meshing of the annular rack 15 and the gear 16, the gear 16 rotates with the rotation of the annular rack 15, thereby driving the bolt 17 to move inside the mounting plate 13 and the valve body 1, thereby realizing the disassembly and assembly of the valve cover 9 above the mounting plate 13, and then the interior can be inspected. When the valve cover 9 is installed, the sealing ring 18 will fit with the valve body 1, so that the sealing ring 18 slides inside the mounting plate 13, and at the same time, the telescopic spring 20 is contracted, and then the contraction of the telescopic spring 20 pushes the sealing ring 18 to fit tightly with the valve body 1, thereby achieving an efficient sealing effect.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas pressure reducing valve capable of realizing self-closing in case of failure, comprising a valve body (1), characterized in that: A support assembly is provided at the bottom of the valve body (1); an air inlet pipe (3) is fixedly connected to one side of the outer wall of the valve body (1); an air outlet pipe (4) is fixedly connected to the other side of the outer wall of the valve body (1); a connecting flange (5) is fixedly connected to the outer walls of the air inlet pipe (3) and the air outlet pipe (4); a pressure gauge (6) is fixedly connected to the top of the connecting flange (5); an air pressure detector (7) is fixedly connected to the inside of the air outlet pipe (4); a movable inclined plate (21) is fixedly connected to the upper surface of the air pressure detector (7); and the inside of the valve body (1) is fixedly connected to the outer wall of the air inlet pipe (3). An inner valve plate (8) is connected, a valve cover (9) is arranged above the valve body (1), a piston rod (10) is fixedly connected inside the valve cover (9), one end of the piston rod (10) is slidably connected to the inner wall of the inner valve plate (8), a main valve spring (11) is sleeved on the top of the piston rod (10), one end of the main valve spring (11) is fixedly connected to the inner wall of the valve cover (9), the other end of the main valve spring (11) is fixedly connected to a sealing plate (12), and the outer wall of the sealing plate (12) is fixedly connected to the inner wall of the valve cover (9).

2. A gas pressure reducing valve capable of self-closing in case of failure according to claim 1, characterized in that: The support assembly comprises a fixed base (2), the upper surface of the fixed base (2) being fixedly connected to the bottom of the valve body (1).

3. A gas pressure reducing valve capable of self-closing in case of failure according to claim 1, characterized in that: A mounting plate (13) is fixedly connected to the lower surface of the valve cover (9), and the mounting plate (13) is in close contact with the valve body (1).

4. A gas pressure reducing valve capable of self-closing in case of failure according to claim 3, characterized in that: The outer wall of the mounting plate (13) is rotatably connected to a rotating ring (14), and the inner wall of the rotating ring (14) is fixedly connected to an annular rack (15).

5. A gas pressure reducing valve capable of self-closing in case of failure according to claim 4, characterized in that: A gear (16) is rotatably connected inside the mounting plate (13), and the gear (16) is meshed with the annular rack (15).

6. A gas pressure reducing valve capable of self-closing in case of failure according to claim 5, characterized in that: The gear (16) is internally threadedly connected to a bolt (17), and the outer wall of the bolt (17) is threadedly connected to the inside of the mounting plate (13) and the valve body (1).

7. A gas pressure reducing valve capable of self-closing in case of failure according to claim 6, characterized in that: A telescopic rod (19) is fixedly connected to the interior of the mounting plate (13), and a telescopic spring (20) is sleeved on the outer wall of the telescopic rod (19).

8. A gas pressure reducing valve capable of self-closing in case of failure according to claim 7, characterized in that: One end of the telescopic spring (20) is fixedly connected to the inside of the mounting plate (13), and the other end of the telescopic spring (20) is fixedly connected to a sealing ring (18), and the outer wall of the sealing ring (18) is slidably connected to the inside of the mounting plate (13) and the valve body (1).

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