Safety valve

Abstract

The utility model belongs to the technical field of natural gas, and particularly relates to a safety valve which comprises a main valve, a first connector is arranged on one side of the main valve in a communicated mode, a second connector is arranged on the side, away from the first connector, of the main valve in a communicated mode, and a manual valve is arranged on the side, away from the main valve, of the second connector in a communicated mode. A butterfly knob is arranged on the upper side of the manual valve, a threaded connector is arranged on the side, away from the main valve, of the manual valve in a communicating mode, and fixing frames are symmetrically arranged on the two sides of the manual valve. When fuel gas is overpressure or underpressure, the main valve can be automatically closed, after the main valve is closed, the air pressure in the second connector is rapidly reduced, the pressure sensor detects that the pressure is reduced, the controller controls the motor in the fixing shell to be started, the output end of the motor drives the clamping sleeve to rotate, and the clamping sleeve screws the butterfly knob to control the manual valve to be closed. The manual valve is closed automatically, double circuit break is completed, manual closing control is not needed, and the potential safety hazard of fuel gas is further reduced.

Description

Technical Field

[0001] This utility model belongs to the field of natural gas technology, and specifically relates to a safety valve. Background Technology

[0002] Natural gas safety valves are essential components of gas systems, designed to prevent gas leaks and protect user safety and property. They are typically installed on pipelines or at the outlet of pressure regulators. When the natural gas pressure in the pipeline exceeds the rated operating pressure, the safety valve automatically opens to release the gas, ensuring that the system pressure remains within a safe range and preventing potential accidents caused by excessive pressure.

[0003] Common natural gas safety valves include self-closing valves, which typically consist of a main valve body connected to a manual valve body. The main valve body operates based on the interaction of magnetism and spring return force. When abnormal gas pressure occurs, the main valve body of the self-closing valve automatically cuts off the gas supply, thus providing protection. The manual valve body on one side of the main valve body allows for manual opening and closing of the gas passage.

[0004] When there is an overpressure or underpressure issue with the gas, the main valve body of the self-closing valve can automatically close. However, the main valve body generally serves as an emergency closing protection mechanism. Because the closing slider inside the main valve body is subject to the action of rollers and double-sided springs, its bidirectional movement is relatively strong, resulting in relatively poor long-term closure of the gas passage. In case of problems such as gas pipeline leakage at the end, it is still necessary to completely cut off the gas passage through the manual valve body. When people are not at home, it is impossible to close the manual valve in time. In addition, people who rarely cook may not notice when the main valve body closes and fail to close the manual valve in time. In this situation, there is still a safety hazard. Utility Model Content

[0005] To address the above problems, the purpose of this utility model is to provide a safety valve that solves the problem that, due to the strong bidirectional movement of the closed-loop slider inside the main valve body caused by the action of rollers and double-sided springs, the long-term closure of the gas passage is relatively poor. When problems such as gas pipeline leakage occur, it is still necessary to completely cut off the gas passage by manually closing the valve body. When people are not at home, it is impossible to close the manual valve in time. In addition, people who rarely cook may not notice when the main valve body is closed and will not be able to close the manual valve in time. In this case, there is still a safety hazard.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a safety valve, comprising a main valve, a connector 1 connected to one side of the main valve, a connector 2 connected to the side of the main valve away from connector 1, a manual valve connected to the side of connector 2 away from the main valve, a butterfly knob on the upper side of the manual valve, a threaded connector on the side of the manual valve away from the main valve, symmetrically arranged fixing frames on both sides of the manual valve, a fixing shell on the upper end of the fixing frame, a controller on the upper side of the fixing shell, a motor on the inner side of the fixing shell, a retaining sleeve on the output end of the motor that engages with the upper side of the butterfly knob, a pressure sensor on the upper side of connector 2, the lower end of the pressure sensor penetrating into the inner side of connector 2, and the upper end of the pressure sensor being wired to the controller.

[0007] The beneficial effects of this utility model are as follows: when the gas pressure is over- or under-pressure, the main valve will automatically close. After the main valve closes, the gas pressure inside the connector 2 drops rapidly. The pressure sensor detects the pressure drop, and the controller controls the motor inside the fixed housing to start. The output end of the motor drives the ferrule to rotate. The ferrule turns the butterfly knob to control the manual valve to close. The manual valve can be automatically closed immediately after the main valve closes, completing a double circuit break. There is no need for manual control to close it, further reducing gas safety hazards.

[0008] For use in disassembling and replacing pressure sensors;

[0009] As a further improvement to the above technical solution: the upper end of the second connector is provided with an interface, and the lower end of the pressure sensor is threadedly sealed to the interface.

[0010] The beneficial effect of this improvement is that it facilitates the disassembly and replacement of pressure sensors.

[0011] To provide better insulation, excellent protection, and prevent the accumulation of static electricity;

[0012] As a further improvement to the above technical solution: both the fixing shell and the sleeve are made of ceramic material.

[0013] The beneficial effects of this improvement are that ceramics not only have better insulation and protection, but also do not easily accumulate static electricity.

[0014] For use in removing the retaining shell;

[0015] As a further improvement to the above technical solution: connecting blocks are symmetrically arranged on both sides of the fixed shell, the connecting blocks cover the upper side of the fixed frame, and a threaded knob is provided on the upper side of the connecting block, the threaded knob passing through the connecting block and threadedly connected to the fixed frame.

[0016] The beneficial effect of this improvement is that the threaded knob can be unscrewed to remove the fixed housing.

[0017] For use in areas without sockets;

[0018] As a further improvement to the above technical solution: a battery box is provided on the upper side of the controller.

[0019] The benefit of this improvement is that it can be used in areas without sockets.

[0020] To determine overvoltage and undervoltage issues;

[0021] As a further improvement to the above technical solution: the controller is provided with a display screen and buttons on its upper side.

[0022] The beneficial effect of this improvement is that during maintenance, the pressure data on the display screen can be adjusted via a button, allowing for timely identification of overpressure and underpressure issues.

[0023] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a side view of the structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the connection structure of the main valve in this utility model;

[0027] Figure 4 This is a schematic diagram of the connection structure of the motor in this utility model;

[0028] In the diagram: 1. Main valve; 2. Connector 1; 3. Connector 2; 4. Manual valve; 5. Butterfly knob; 6. Threaded connector; 7. Mounting bracket; 8. Mounting housing; 9. Controller; 10. Pressure sensor; 11. Battery box; 12. Display screen; 13. Button; 14. Threaded knob; 15. Connecting block; 16. Compression fitting. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0030] like Figure 1 — Figure 4As shown: A safety valve includes a main valve 1, with a connector 2 connected to one side of the main valve 1, a connector 3 connected to the side of the main valve 1 away from connector 2, and a manual valve 4 connected to the side of connector 3 away from the main valve 1. A butterfly knob 5 is provided on the upper side of the manual valve 4, and a threaded connector 6 is provided on the side of the manual valve 4 away from the main valve 1. Fixing brackets 7 are symmetrically arranged on both sides of the manual valve 4, and a fixing shell 8 is provided at the upper end of the fixing bracket 7. A control mechanism is provided on the upper side of the fixing shell 8. The device 9 has a motor installed inside the fixed housing 8. A retaining sleeve 16 is positioned downwards at the motor's output end, engaging with the upper side of the butterfly knob 5. A pressure sensor 10 is installed on the upper side of the connector 3, with its lower end extending through the inside of the connector 3. The upper end of the pressure sensor 10 is wired to the controller 9. When the gas pressure is over- or under-pressured, the main valve 1 automatically closes. After the main valve 1 closes, the gas pressure inside the connector 3 drops rapidly. The pressure sensor 10 detects this pressure drop, and the controller 9 controls the motor inside the fixed housing 8. When the motor is turned on, the output end of the motor drives the ferrule 16 to rotate. The ferrule 16 turns the butterfly knob 5 to control the manual valve 4 to close. This allows the manual valve 4 to automatically close immediately after the main valve 1 closes, achieving a double circuit break without manual control, further reducing gas safety hazards. The upper end of the connector 3 has an interface, and the lower end of the pressure sensor 10 is threaded and sealed to the interface for disassembly and replacement. Both the fixing shell 8 and the ferrule 16 are made of ceramic. Ceramic not only has good insulation and protection but also does not easily accumulate static electricity. Connecting blocks 15 are symmetrically arranged on both sides of the fixed shell 8. The connecting blocks 15 press against the upper side of the fixed frame 7. A threaded knob 14 is provided on the upper side of the connecting blocks 15. The threaded knob 14 passes through the connecting blocks 15 and is threadedly connected to the fixed frame 7. Unscrewing the threaded knob 14 is used to disassemble the fixed shell 8. A battery box 11 is provided on the upper side of the controller 9 for use in areas without sockets. A display screen 12 and a button 13 are provided on the upper side of the controller 9. During maintenance, the pressure data on the display screen 12 can be adjusted by pressing the button 13 to promptly determine overpressure and underpressure problems.

[0031] Working principle and usage process of this utility model:

[0032] In use, the main valve 1 connects to the natural gas input via connector 2, and then connects to the gas output via the threaded connector 6 of the manual valve 4. When the gas pressure is too high or too low, the main valve 1 will automatically close. After the main valve 1 closes, the gas pressure inside connector 3 drops rapidly. The pressure sensor 10 detects the pressure drop, and the controller 9 controls the motor inside the fixed housing 8 to start. The output end of the motor drives the retainer 16 to rotate, and the retainer 16 turns the butterfly knob 5 to close the manual valve 4. The manual valve 4 can be automatically closed immediately after the main valve 1 closes, completing a double circuit break without manual control, further reducing gas safety hazards. In addition, the upper end of connector 3 has an interface, and the lower end of the pressure sensor 10 is threaded onto the interface. The sealed connection is used for disassembling and replacing the pressure sensor 10. In addition, both the fixing housing 8 and the clamping sleeve 16 are made of ceramic. Ceramic not only has good insulation and protection, but also does not easily accumulate static electricity. Furthermore, there are symmetrical connecting blocks 15 on both sides of the fixing housing 8. The connecting blocks 15 press against the upper side of the fixing frame 7. A threaded knob 14 is provided on the upper side of the connecting block 15. The threaded knob 14 passes through the connecting block 15 and is threadedly connected to the fixing frame 7. Unscrewing the threaded knob 14 is used to disassemble the fixing housing 8. In addition, a battery box 11 is provided for use in areas without sockets. Furthermore, a display screen 12 and a button 13 are provided on the upper side of the controller 9. During maintenance, the pressure data on the display screen 12 can be selected through the button 13 to promptly determine overpressure and underpressure problems.

[0033] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of the present invention, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A safety valve, characterized in that: The system includes a main valve (1), a connector (2) connected to one side of the main valve (1), a connector (3) connected to the side of the main valve (1) away from the connector (2), a manual valve (4) connected to the side of the connector (3) away from the main valve (1), a butterfly knob (5) provided on the upper side of the manual valve (4), a threaded connector (6) connected to the side of the manual valve (4) away from the main valve (1), and fixing brackets (7) symmetrically arranged on both sides of the manual valve (4). The upper end of the fixing frame (7) is provided with a fixing shell (8), the upper side of the fixing shell (8) is provided with a controller (9), the inner side of the fixing shell (8) is provided with a motor, the output end of the motor is provided with a retaining sleeve (16) facing downward, the retaining sleeve (16) is engaged with the upper side of the butterfly knob (5), the upper side of the connector two (3) is provided with a pressure sensor (10), the lower end of the pressure sensor (10) penetrates into the inner side of the connector two (3), and the upper end of the pressure sensor (10) is wired and connected to the controller (9).

2. A safety valve according to claim 1, characterized in that: The upper end of the connector (3) is provided with an interface, and the lower end of the pressure sensor (10) is threadedly sealed to the interface.

3. A safety valve according to claim 1, characterized in that: Both the fixing shell (8) and the sleeve (16) are made of ceramic.

4. A safety valve according to claim 1, characterized in that: Connecting blocks (15) are symmetrically arranged on both sides of the fixed shell (8). The connecting blocks (15) press against the upper side of the fixed frame (7). A threaded knob (14) is provided on the upper side of the connecting blocks (15). The threaded knob (14) passes through the connecting blocks (15) and is threadedly connected to the fixed frame (7).

5. A safety valve according to claim 1, characterized in that: A battery box (11) is provided on the upper side of the controller (9).

6. A safety valve according to claim 1, characterized in that: The controller (9) is equipped with a display screen (12) and buttons (13) on its upper side.

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