Safety valve for natural gas pipelines

Abstract

This utility model relates to the field of safety valve technology, specifically a safety valve for natural gas pipelines, comprising a self-closing valve body. A control button is slidably connected to the front of the self-closing valve, and two symmetrically arranged arc-shaped frames are fixedly connected to the front of the self-closing valve. The advantages of this utility model are: pushing the control plate compresses the spring, the transmission rod drives the clamping plate to clamp the control button, and pulling or pressing the lifting frame moves along the guide rod to open the valve; after operation, releasing the control plate causes the spring to return, disengaging the clamping plate from the control button, the lifting frame returns to its original position, and the protective cover continues to provide protection. This design forms a physical barrier through the protective cover, and, together with the arc-shaped plate and locking bolts, prevents accidental activation by cleaning tools, children, etc.; simultaneously, the operating assembly consisting of the control plate, transmission rod, and clamping plate does not affect normal control, yet requires active operation to trigger the control button, further reducing the probability of accidental activation.

Description

Technical Field

[0001] This utility model relates to the field of safety valve technology, and in particular to a safety valve for natural gas pipelines. Background Technology

[0002] A natural gas pipeline safety valve (self-closing valve) is a safety device installed between the natural gas pipeline and gas-using appliances such as stoves and water heaters. It automatically cuts off the gas supply under specific hazardous conditions. In summary, it is a valve that uses a built-in mechanical structure (such as a diaphragm, spring, lever, etc.) to sense changes in gas pressure or abnormal flow within the pipeline. When it detects dangerous conditions such as overpressure, underpressure, or overflow, it automatically closes the valve to block gas delivery. The valve can only be reopened manually after the danger has passed. This device typically consists of a valve body, an inlet, an outlet, a pressure-sensing diaphragm, a reset button, and a sealing assembly. The valve body is connected to the end of the gas pipeline; the inlet connects to the main pipeline, and the outlet connects to the gas-using appliance. The pressure-sensing diaphragm senses gas pressure fluctuations; when the pressure exceeds the safe range, it pushes the lever structure, causing the sealing assembly to close the valve. The reset button is used to manually open the valve after the danger has passed, restoring the gas supply.

[0003] Due to their structural design, existing self-closing valves used in natural gas pipelines are prone to accidental activation due to improper human operation, causing inconvenience to users and even posing safety hazards. Currently, the reset button and sensing components of these valves are mostly exposed on the outside of the pipeline or under the stove, lacking effective protective structures. In daily use, accidental contact can easily trigger malfunctions: firstly, when cleaning the stove or cabinets, cloths or cleaning tools may bump into the reset button, causing it to accidentally trigger the shut-off mechanism, cutting off the gas supply and affecting normal gas usage. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to provide a safety valve for natural gas pipelines to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0006] To achieve the above objectives, one embodiment of this utility model provides a safety valve for natural gas pipelines, comprising a self-closing valve body. A control button is slidably connected to the front of the self-closing valve body. Two symmetrically arranged arc-shaped frames are fixedly connected to the front of the self-closing valve body. An arc-shaped plate is slidably connected to the inner wall of each arc-shaped frame. A locking bolt is rotatably connected to one side of each arc-shaped frame. The threaded portions of the two locking bolts are threadedly connected to the two arc-shaped plates respectively. A protective cover is fixedly connected between the two arc-shaped plates. Two symmetrically arranged sliding grooves are opened through the left and right sides of the protective cover. Two symmetrically arranged guide rods are fixedly connected to the inner wall of each sliding groove. A lifting frame is slidably connected between the two guide rods. Two symmetrically arranged springs are fixedly connected to the inner wall of each lifting frame. A control plate is fixedly connected to the end of each spring away from the lifting frame. Two symmetrically arranged transmission rods are fixedly connected to the inner side of the control plate. Both transmission rods are slidably connected to the lifting frame. A clamping plate is fixedly connected to the end of each transmission rod away from the control plate. The control button is located between the two clamping plates.

[0007] Preferably, one side of the protective cover has a clearance hole, which corresponds to the control button.

[0008] Preferably, of any of the above solutions, a curved glass is embedded in the top of the protective cover, and the curved glass corresponds vertically to the control button.

[0009] Preferably, one of the above solutions has two symmetrically arranged guide holes through one side of the lifting frame, and the lifting frame is slidably connected to the guide rod through the guide holes.

[0010] Preferably, in any of the above solutions, a threaded hole is provided on the outer surface of each of the arc-shaped plates, and the screw portions of the two locking bolts are threadedly connected to the two arc-shaped plates respectively through the two threaded holes.

[0011] Preferably, in any of the above embodiments, the inner wall of the clamping plate is fixedly connected with a plurality of anti-slip pads arranged in a circumferential array, and the anti-slip pads are made of rubber.

[0012] Preferably, in any of the above solutions, the protective cover has two symmetrically arranged positioning pins fixedly connected to the side of the self-closing valve body, and the protective cover is engaged with the self-closing valve body through the positioning pins.

[0013] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0014] 1. During assembly, the protective cover is engaged with the self-closing valve body using positioning pins. The sliding arc-shaped plate covers the control button, and the locking bolts are tightened to secure the arc-shaped plate. In daily use, the protective cover prevents external objects from directly touching the control button. If operation is required, a hand can be inserted through the clearance hole to press the control button to close the valve. Pushing the control plate compresses the spring, and the transmission rod drives the clamping plate to clamp the control button. Pulling or pressing the lifting frame along the guide rod opens the valve. After operation, releasing the control plate releases the spring, causing the clamping plate to disengage from the control button, the lifting frame returns to its original position, and the protective cover continues to provide protection. This design forms a physical barrier with the protective cover, which, together with the arc-shaped plate and locking bolts, prevents accidental activation by cleaning tools, children, etc. At the same time, the operating components consisting of the control plate, transmission rod, and clamping plate do not affect normal control, but require active operation to trigger the control button, further reducing the probability of accidental activation, ensuring the safe operation of natural gas pipelines, and reducing gas interruptions and safety hazards caused by accidental activation.

[0015] 2. When observing the status of the control buttons, the curved glass allows direct viewing without disassembling the protective cover. When installing the protective cover, the positioning pins quickly position the buttons, ensuring precise alignment between the clearance holes, the curved glass, and the control buttons. The lifting frame slides along the guide rod through the guide holes, ensuring smooth movement during operation. The anti-slip pads on the clamping plate increase friction with the control buttons, preventing slippage. In this design, the curved glass enables status visualization, improving ease of observation; the positioning pins and guide rods ensure precise fit of all components, enhancing structural stability; and the anti-slip pads ensure reliable operation, preventing operational errors caused by slippage. The overall structure, while preventing accidental touches, also considers ease of operation and stability, allowing users to easily control valves and check their status, improving the user experience and device reliability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the assembly of this utility model;

[0017] Figure 2 This is an exploded structural diagram of the assembly of this utility model;

[0018] Figure 3 This is a first-view structural schematic diagram of the protective cover of this utility model;

[0019] Figure 4 This is a second-view structural schematic diagram of the protective cover of this utility model;

[0020] Figure 5 This is a schematic diagram of the lifting frame of this utility model.

[0021] In the diagram: 1-Self-closing valve body, 2-Control button, 3-Arc frame, 4-Arc plate, 5-Locking bolt, 6-Protective cover, 7-Slide groove, 8-Guide rod, 9-Lifting frame, 10-Spring, 11-Control board, 12-Transmission rod, 13-Clamping plate, 14-Allowing hole, 15-Arc glass, 16-Guide hole, 17-Threaded hole, 18-Anti-slip pad, 19-Positioning pin. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited thereto.

[0023] like Figures 1 to 5 As shown, a safety valve for a natural gas pipeline includes a self-closing valve body 1. A control button 2 is slidably connected to the front of the self-closing valve body 1. Two symmetrically arranged arc-shaped frames 3 are fixedly connected to the front of the self-closing valve body 1. An arc-shaped plate 4 is slidably connected to the inner wall of each arc-shaped frame 3. A locking bolt 5 is rotatably connected to one side of each arc-shaped frame 3. The threaded parts of the two locking bolts 5 are respectively threaded to the two arc-shaped plates 4. A protective cover 6 is fixedly connected between the two arc-shaped plates 4. Two symmetrically arranged sliding grooves 7 are opened through the left and right sides of the protective cover 6. Two symmetrically arranged guide rods 8 are fixedly connected to the inner wall of each slide 7. A lifting frame 9 is slidably connected between the two guide rods 8. Two symmetrically arranged springs 10 are fixedly connected to the inner wall of each lifting frame 9. A control plate 11 is fixedly connected to the end of the two springs 10 away from the lifting frame 9. Two symmetrically arranged transmission rods 12 are fixedly connected to the inner side of the control plate 11. Both transmission rods 12 are slidably connected to the lifting frame 9. A clamping plate 13 is fixedly connected to the end of the two transmission rods 12 away from the control plate 11. The control button 2 is located between the two clamping plates 13.

[0024] As an optional technical solution of this utility model, a clearance hole 14 is provided through one side of the protective cover 6. The clearance hole 14 corresponds to the control button 2. The clearance hole 14 of the protective cover 6 and the control button 2 correspond to each other, which not only provides the necessary channel for the operation of the control button 2, ensuring that the user can press or pull the control button 2 normally through the clearance hole 14 when needed, but also avoids the control button 2 being completely exposed, reducing the possibility of unrelated objects directly touching the control button 2. While ensuring the convenience of operation, it further reduces the risk of accidental touch.

[0025] As an optional technical solution of this utility model, an arc-shaped glass 15 is embedded in the top of the protective cover 6. The arc-shaped glass 15 corresponds vertically to the control button 2. The arc-shaped glass 15 on the top of the protective cover 6 corresponds vertically to the control button 2. Users can clearly observe the status of the control button 2 (such as position, indicator, etc.) through the arc-shaped glass 15 without disassembling the protective cover 6, which is convenient for timely understanding of the valve operation. At the same time, the arc-shaped glass 15 is part of the protective cover 6 and does not affect its protective function, thus taking into account both the convenience of status monitoring and the reliability of preventing accidental touch.

[0026] As an optional technical solution of this utility model, two symmetrically arranged guide holes 16 are opened through one side of the lifting frame 9. The lifting frame 9 is slidably connected to the guide rod 8 through the guide holes 16. The cooperation between the guide holes 16 and the guide rod 8 provides precise guidance for the movement of the lifting frame 9, ensuring that the lifting frame 9 moves smoothly along a fixed trajectory when driving the control board 11 and the clamping plate 13 to operate the control button 2, avoiding operation deviation due to shaking, and improving the stability and accuracy of the operation of the control button 2.

[0027] As an optional technical solution of this utility model, each arc plate 4 has a threaded hole 17 on its outer surface. The screws of the two locking bolts 5 are threadedly connected to the two arc plates 4 through the two threaded holes 17 respectively. The threaded holes 17 of the arc plate 4 are threadedly connected to the locking bolts 5. After the arc plate 4 slides along the arc frame 3 to adjust the position of the protective cover 6, tightening the locking bolts 5 can firmly fix the arc plate 4 and the arc frame 3, preventing the protective cover 6 from shifting due to vibration and collision during use, ensuring that the protective cover 6 always accurately covers the control button 2, and ensuring the stability of the protective effect.

[0028] As an optional technical solution of this utility model, the inner wall of the clamping plate 13 is fixedly connected with a plurality of circumferentially arrayed anti-slip pads 18. The anti-slip pads 18 are made of rubber. The anti-slip pads 18 on the inner wall of the clamping plate 13 can increase the friction with the control button 2. When the clamping plate 13 clamps the control button 2 for operation, it avoids operation failure or damage to the control button 2 due to slippage, ensuring reliable and stable operation. At the same time, the rubber anti-slip pads 18 have a certain elasticity, which can reduce the wear of the control button 2 during clamping and extend the service life of the component.

[0029] As an optional technical solution of this utility model, the protective cover 6 is fixedly connected to two symmetrically arranged positioning pins 19 on the side near the self-closing valve body 1. The protective cover 6 is engaged with the self-closing valve body 1 through the positioning pins 19. The positioning pins 19 of the protective cover 6 are engaged with the self-closing valve body 1, which can quickly achieve accurate positioning when installing the protective cover 6, ensuring that the clearance hole 14, the curved glass 15 of the protective cover 6 and the control button 2 are accurately aligned, simplifying the installation steps. At the same time, the engagement structure can help fix the protective cover 6, prevent it from shifting in the initial installation stage, lay the foundation for subsequent fixing by locking bolts 5, and improve the overall installation efficiency and accuracy.

[0030] A safety valve for natural gas pipelines operates on the following principle:

[0031] 1): Connect the protective cover 6 to the self-closing valve body 1 via the positioning pin 19, slide the arc plate 4 to cover the control button 2 with the protective cover 6, and tighten the locking bolt 5 to fix the arc plate 4.

[0032] 2): If operation is required, the valve can be closed by inserting a hand through the clearance hole 14 and pressing the control button 2. Pushing the control plate 11 will compress the spring 10, and the transmission rod 12 will drive the clamping plate 13 to clamp the control button 2. Pulling or pressing the lifting frame 9 along the guide rod 8 will open the valve.

[0033] 3): After the operation is completed, release the control board 11, the spring 10 returns to its original position so that the clamping plate 13 is disengaged from the control button 2, the lifting frame 9 returns to its original position, and the protective cover 6 continues to provide protection.

[0034] In summary, the safety valve for this natural gas pipeline uses a protective cover 6 that is engaged with the self-closing valve body 1 via a positioning pin 19. The sliding arc plate 4 allows the protective cover 6 to cover the control button 2, and the locking bolt 5 is tightened to fix the arc plate 4. In daily use, the protective cover 6 prevents external objects from directly touching the control button 2. If operation is required, the valve can be closed by inserting a hand through the clearance hole 14 and pressing the control button 2. Pushing the control plate 11 compresses the spring 10, and the transmission rod 12 drives the clamping plate 13 to clamp the control button 2. Pulling or pressing the lifting frame 9 along the guide rod 8 opens the valve. After the operation is completed, the control plate 11 is released, the spring 10 returns to its original position, the clamping plate 13 disengages from the control button 2, the lifting frame 9 returns to its original position, and the protective cover 6 continues to provide protection. This design uses the protective cover 6 to form a physical barrier, which, together with the curved plate 4 and locking bolts 5, fixes the position and prevents accidental activation by cleaning tools, children, etc. At the same time, the operating assembly consisting of the control board 11, transmission rod 12, and clamping plate 13 does not affect normal control, but requires active operation to trigger the control button 2, further reducing the probability of accidental activation, ensuring the safe operation of the natural gas pipeline, reducing gas interruption and safety hazards caused by accidental activation, and allowing direct observation of the status of the control button 2 through the curved glass 15 without disassembling the protective cover 6. When installing the protective cover 6, the positioning pin 19 quickly positions it to ensure that the clearance hole 14, the curved glass 15, and the control button 2 are precisely aligned. The lifting frame 9 slides along the guide rod 8 through the guide hole 16 to ensure smooth movement during operation. The anti-slip pad 18 of the clamping plate 13 increases the friction with the control button 2 to prevent slippage during operation.

Claims

1. A safety valve for natural gas pipelines, characterized in that: The device includes a self-closing valve body (1), on the front of which a control button (2) is slidably connected. Two symmetrically arranged arc-shaped frames (3) are fixedly connected to the front of the self-closing valve body (1). An arc-shaped plate (4) is slidably connected to the inner wall of each arc-shaped frame (3). A locking bolt (5) is rotatably connected to one side of each arc-shaped frame (3). The screws of the two locking bolts (5) are threadedly connected to the two arc-shaped plates (4). A protective cover (6) is fixedly connected between the two arc-shaped plates (4). Two symmetrically arranged sliding grooves (7) are opened through the left and right sides of the protective cover (6). The inner wall of each sliding groove (7) is fixedly connected. Two symmetrically arranged guide rods (8) are connected, and a lifting frame (9) is slidably connected between the two guide rods (8). Two symmetrically arranged springs (10) are fixedly connected to the inner wall of each lifting frame (9). A control plate (11) is fixedly connected to the end of the two springs (10) away from the lifting frame (9). Two symmetrically arranged transmission rods (12) are fixedly connected to the inner side of the control plate (11). Both transmission rods (12) are slidably connected to the lifting frame (9). A clamping plate (13) is fixedly connected to the end of the two transmission rods (12) away from the control plate (11). The control button (2) is located between the two clamping plates (13).

2. A safety valve for a natural gas pipeline according to claim 1, characterized in that: A clearance hole (14) is provided through one side of the protective cover (6), and the clearance hole (14) corresponds to the control button (2) in front and behind.

3. A safety valve for a natural gas pipeline according to claim 2, characterized in that: The top of the protective cover (6) is fitted with an arc-shaped glass (15), which corresponds vertically to the control button (2).

4. A safety valve for a natural gas pipeline according to claim 3, characterized in that: Two symmetrically arranged guide holes (16) are opened through one side of the lifting frame (9), and the lifting frame (9) is slidably connected to the guide rod (8) through the guide holes (16).

5. A safety valve for a natural gas pipeline according to claim 4, characterized in that: Each of the arc-shaped plates (4) has a threaded hole (17) on its outer surface, and the screws of the two locking bolts (5) are threadedly connected to the two arc-shaped plates (4) through the two threaded holes (17).

6. A safety valve for a natural gas pipeline according to claim 5, characterized in that: The inner wall of the clamping plate (13) is fixedly connected with a number of anti-slip pads (18) arranged in a circular array, and the anti-slip pads (18) are made of rubber.

7. A safety valve for a natural gas pipeline according to claim 6, characterized in that: The protective cover (6) has two symmetrically arranged positioning pins (19) fixedly connected to one side of the self-closing valve body (1), and the protective cover (6) is engaged with the self-closing valve body (1) through the positioning pins (19).

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