Gas leakage prevention device

Abstract

The utility model discloses a gas leakproof device, relates to the technical field of gas pipeline control, and aims to solve the problem that gas in a natural gas pipeline is heated to expand and boost pressure to influence the pipeline. According to the key points of the technical scheme, the valve comprises a valve body, a first valve plug in sliding connection with the air inlet end of the valve body, a sliding seat located in the valve body and in sliding connection with the valve body and rotating pieces hinged to the two ends of the bottom side of the sliding seat, a baffle is fixedly connected to the center of the valve body, a sliding rod is fixedly connected to the sliding seat and penetrates through the baffle, and an abutting piece is fixedly connected to the sliding rod; a deformation piece is fixedly connected to the position, on the upper side of the baffle, of the valve body, abuts against the abutting piece, has a memory function and can deform after being heated. According to the gas leakage prevention device, the sliding rod is driven to move upwards through thermal deformation of the deformation piece, at the moment, the gas outlet end of the valve body is closed through the second valve plug, pressure of gas is relieved towards the pressure relief ball, pressure borne by a pipeline is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of gas pipeline control, and more specifically, to a gas leakage prevention device. Background Art

[0002] The natural gas transmission and distribution system is usually supplied to each household through a pipeline distribution system. Various valves are installed in the pipeline to protect the use of natural gas.

[0003] The self-closing valve is a valve that plays a flow-limiting role in the natural gas pipeline. After the self-closing valve is set, when the pressure difference between the input and output ends of the self-closing valve is too large, the self-closing valve will automatically close the flow channel to prevent the natural gas from continuing to flow. It is used for protection when the pipeline is damaged and leaking.

[0004] Natural gas is a temperature-sensitive gas and tends to expand when the temperature rises. Current self-closing valves usually close the air inlet side of the valve body. If the ambient temperature rises, the pressure inside the pipeline will increase, which can easily cause the pipeline to break.

[0005] Therefore, new solutions need to be proposed to solve this problem. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a gas leakage prevention device, which drives the sliding rod to move upward through the heat deformation of the deformation plate. At this time, the valve plug 2 closes the gas outlet end of the valve body, and the gas is decompressed to the pressure relief ball, reducing the pressure on the pipeline.

[0007] The above-mentioned technical objective of the utility model is achieved through the following technical scheme: a gas leakage prevention device comprises a valve body, a valve plug slidably connected to the air inlet end of the valve body, a sliding seat slidably connected to the valve body, and rotating plates hinged at both ends of the bottom side of the sliding seat, the valve body is fixedly connected with a baffle at the center position, the sliding seat is fixedly connected with a sliding rod, the sliding rod penetrates the baffle, the sliding rod is fixedly connected with an abutment plate, the valve body is fixedly connected with a deformation plate on the upper side of the baffle, the deformation plate abuts with the abutment plate, the deformation plate has a memory function and will deform after being heated, the valve body is fixedly connected with a control part on the upper side of the deformation plate, the valve outlet end of the valve body is fixedly connected with a blocking part controlled by the control part, and the bottom end of the valve body is fixedly connected with a pressure relief ball.

[0008] The utility model is further configured as follows: the control component includes a mounting seat fixedly connected to the valve body and a sliding block slidably connected to the mounting seat, the bottom end of the sliding block is in contact with the deformation sheet, and a wire is provided on the mounting seat, and the wire is connected to the blocking member.

[0009] The utility model is further configured as follows: the blocking member includes an electromagnet fixedly connected to the outside of the valve body's air outlet end and a sliding magnetic ring slidably connected to the inside of the valve body's air outlet end, a valve plug 2 is fixedly connected to the sliding magnetic ring, and the wire is electrically connected to the electromagnet.

[0010] The utility model is further configured as follows: the diameter of the valve plug 2 gradually increases as it approaches the sliding magnetic ring.

[0011] The utility model is further configured as follows: an abutment plate is fixedly connected in the valve body.

[0012] The utility model is further configured as follows: a connecting port is fixedly connected to the bottom end of the valve body, the pressure relief ball sleeve is arranged on the connecting port, and a sealing nut is threadedly connected to the connecting port.

[0013] The utility model is further configured as follows: a support seat is fixedly connected to the air outlet end of the valve body, a tension spring is fixedly connected to the support seat, and the tension spring is fixedly connected to the sliding magnetic ring at a side away from the support seat.

[0014] The utility model is further configured as follows: a pressing seat is fixedly connected to the side of the sliding rod away from the valve body.

[0015] In summary, the utility model has the following beneficial effects:

[0016] The deformation of the deformation plate due to heat drives the sliding rod to move upward. At this time, the valve plug 2 closes the gas outlet end of the valve body, and the gas is depressurized to the pressure relief ball, reducing the pressure on the pipeline and extending the service life of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 The internal structure of the utility model is shown in FIG. Figure 1 ;

[0019] Figure 3 for Figure 2 A in the enlarged view;

[0020] Figure 4 for Figure 2 The enlarged view of point B in the figure;

[0021] Figure 5 The internal structure of the utility model is shown in FIG. Figure 2 ;

[0022] Figure 6 The internal structure of the utility model is shown in FIG. Figure 3 .

[0023] In the figure: 1. valve body; 2. valve plug 1; 3. sliding seat; 4. rotating plate; 5. baffle; 6. sliding rod; 7. abutment plate; 8. deformation plate; 9. pressure relief ball; 10. mounting seat; 11. sliding block; 12. wire; 13. electromagnet; 14. sliding magnetic ring; 15. valve plug 2; 16. abutment plate; 17. connecting port; 18. sealing nut; 19. support seat; 20. tension spring; 21. pressing seat. DETAILED DESCRIPTION

[0024] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] A gas leakage prevention device, such as Figure 1-3 As shown, it includes a valve body 1, a valve plug 2 slidably connected to the air inlet end of the valve body 1, a sliding seat 3 slidably connected inside the valve body 1, and a rotating piece 4 hinged at the bottom end of the sliding seat 3. When leakage occurs at the air outlet end of the valve body 1, resulting in pressure imbalance between the air inlet and air outlet ends of the valve body 1, the air pressure will drive the valve plug 2 to block the air inlet end, so that the transportation of natural gas is interrupted, avoiding safety hazards caused by natural gas leakage. During the movement of the valve plug 2, the rotating piece 4 will be pushed to lock the sliding seat 3.

[0026] like Figure 1-3 As shown, a baffle 5 is fixedly connected to the center position of the valve body 1, which limits the rotating piece 4 to prevent the rotating piece 4 from moving upward excessively. An abutment piece 7 is fixedly connected to the sliding rod 6, and a deformation piece 8 is fixedly connected to the baffle 5. The deformation piece 8 is made of memory metal and has a memory function. When the deformation piece 8 is at room temperature, it has deformation ability and deforms with the movement of the sliding rod 6 through abutment with the abutment piece 7. After the deformation piece 8 is heated, it will deform autonomously to drive the abutment piece 7. At this time, the sliding rod 6 moves upward, and the valve body 1 is fixedly connected to the upper side of the deformation piece 8. The control part is triggered during the upward movement of the sliding rod 6, and the control part drives the blocking part. At this time, the blocking part blocks the air outlet end of the valve body 1 to achieve closed protection, and releases the pressure of the gas expanded by heat to the outside through the pressure relief ball 9 arranged at the bottom end of the valve body 1 to prevent the pressure on the inner wall of the pipeline from increasing and damaging the pipeline.

[0027] like Figure 1-4 As shown, the control component includes a mounting seat 10 fixedly connected to the valve body 1 and a sliding block 11 slidably connected to the mounting seat 10. The bottom end of the sliding block 11 contacts the deformation piece 8. When the deformation piece 8 moves downward, the sliding block 11 slides down, and when the deformation piece 8 pushes upward, the mounting seat 10 is triggered. At this time, the circuit inside the mounting seat 10 is opened, driving the blocking member to move.

[0028] like Figure 1-6As shown, the blocking member includes an electromagnet 13 fixedly connected to the outer side of the air outlet end of the valve body 1 and a sliding magnetic ring 14 slidably connected to the air outlet end of the valve body 1. The wire 12 is connected to the electromagnet 13. When the internal circuit of the mounting seat 10 is open, the electromagnet 13 is energized to generate magnetic force, and the sliding magnetic ring 14 is attracted and uses the valve plug 15 to block the air outlet end. The air inlet end of the valve body 1 is connected to the center position. When the natural gas expands due to heat, the air pressure is released to the vent ball to avoid excessive air pressure in the pipeline.

[0029] like Figure 1-4 As shown, the valve plug 15 gradually decreases in diameter as it moves away from the sliding magnetic ring 14, and can improve the sealing effect by blocking when blocked.

[0030] like Figure 1-3 As shown, an abutment plate 16 is fixedly connected inside the valve body 1. By installing the abutment plate 16, the sliding range of the sliding block 11 is limited, and at the same time, the inner cavity of the valve body 1 can be separated to prevent air leakage in the inner cavity of the valve body 1.

[0031] like Figure 1-6 As shown, a connection port 17 is fixedly connected to the bottom end of the valve body 1, and a pressure relief ball 9 is sleeved on the connection port 17. A sealing nut 18 is threadedly connected to the connection port 17. The threaded connection improves the sealing performance, stabilizes the connection of the pressure relief ball 9, avoids air leakage, and facilitates installation.

[0032] like Figure 1-6 As shown, a support seat 19 is fixedly connected to the air outlet end of the valve body 1, and a tension spring 20 is fixedly connected to the support seat 19. The tension spring 20 is fixedly connected to the sliding magnetic ring 14 on the side away from the support seat 19. Through the setting of the tension spring 20, when the sliding magnetic ring 14 is not attracted by the electromagnetic block, the sliding magnetic ring 14 is brought back by the tension spring 20, thereby improving the resetting efficiency and ensuring smooth gas supply; a pressing seat 21 is fixedly connected to the side of the sliding rod 6 away from the valve body 1. Under the setting of the pressing seat 21, manual resetting can be performed, and appropriate air release can be performed while ensuring safety, thereby ensuring the safety of the inner cavity of the pipeline.

[0033] Working principle:

[0034] When leakage occurs at the outlet end of the valve body 1, resulting in pressure imbalance at the inlet and outlet ends of the valve body 1, the air pressure will drive the valve plug 2 to block the inlet end, thereby interrupting the delivery of natural gas and avoiding safety hazards caused by natural gas leakage. During the movement of the valve plug 2, the rotating piece 4 will be pushed to lock the sliding seat 3.

[0035] The deformation piece 8 is made of memory metal and has a memory function. It has the ability to deform when the deformation piece 8 is at room temperature. It deforms as the sliding rod 6 moves by abutting against the abutting piece 7. After the deformation piece 8 is heated, it will deform autonomously and drive the abutting piece 7. At this time, the sliding rod 6 moves upward, and the valve body 1 is fixedly connected to the upper side of the deformation piece 8 with a control part. The control part is triggered during the upward movement of the sliding rod 6, and the control part drives the blocking part. At this time, the blocking part blocks the air outlet of the valve body 1 to achieve closed protection, and releases the pressure of the gas expanded by heat to the outside through the pressure relief ball 9 arranged at the bottom end of the valve body 1 to avoid the pressure on the inner wall of the pipeline increasing and damaging the pipeline.

[0036] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A gas leakage prevention device, comprising a valve body (1), a valve plug (2) slidably connected to the gas inlet end of the valve body (1), a sliding seat (3) slidably connected inside the valve body (1), and a rotating piece (4) hinged at both ends of the bottom side of the sliding seat (3), characterized in that: The valve body (1) is fixedly connected to a baffle plate (5) at the center position, the sliding seat (3) is fixedly connected to a sliding rod (6), the sliding rod (6) penetrates the baffle plate (5), the sliding rod (6) is fixedly connected to a contact plate (7), the valve body (1) is fixedly connected to a deformation plate (8) on the upper side of the baffle plate (5), the deformation plate (8) abuts against the contact plate (7), the deformation plate (8) has a memory function and will deform after being heated, the valve body (1) is fixedly connected to a control component on the upper side of the deformation plate (8), the valve body (1) is fixedly connected to a blocking component controlled by the control component at the air outlet end, and the valve body (1) is fixedly connected to a pressure relief ball (9) at the bottom end.

2. A gas leakage prevention device according to claim 1, characterized in that: The control component comprises a mounting seat (10) fixedly connected to the valve body (1) and a sliding block (11) slidably connected to the mounting seat (10), the bottom end of the sliding block (11) is in contact with the deformation sheet (8), and a wire (12) is provided on the mounting seat (10), and the wire (12) is connected to the blocking member.

3. A gas leakage prevention device according to claim 2, characterized in that: The blocking member comprises an electromagnet (13) fixedly connected to the outside of the air outlet end of the valve body (1) and a sliding magnetic ring (14) slidably connected to the inside of the air outlet end of the valve body (1), a valve plug 2 (15) being fixedly connected to the sliding magnetic ring (14), and the conductive wire (12) being electrically connected to the electromagnet (13).

4. A gas leakage prevention device according to claim 3, characterized in that: The diameter of the valve plug 2 (15) gradually decreases as it moves away from the sliding magnetic ring (14).

5. A gas leakage prevention device according to claim 1, characterized in that: An abutment plate (16) is fixedly connected inside the valve body (1).

6. A gas leakage prevention device according to claim 1, characterized in that: The bottom end of the valve body (1) is fixedly connected with a connection port (17), the pressure relief ball (9) is sleeved on the connection port (17), and a sealing nut (18) is threadedly connected to the connection port (17).

7. A gas leakage prevention device according to claim 3, characterized in that: A support seat (19) is fixedly connected to the air outlet end of the valve body (1), a tension spring (20) is fixedly connected to the support seat (19), and the tension spring (20) is fixedly connected to the sliding magnetic ring (14) on a side away from the support seat (19).

8. A gas leakage prevention device according to claim 1, characterized in that: The side of the sliding rod (6) away from the valve body (1) is fixedly connected to a pressing seat (21).

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