Leakage-proof safety valve

Abstract

The utility model provides a leakproof safety valve, and belongs to the technical field of valves. The leakage-proof safety valve solves the problem that an existing gas valve is practical and dangerous in low pressure, and comprises a gas valve body provided with a gas inlet pipe and a gas outlet pipe, an electromagnetic control valve is arranged on the gas valve body, a mounting base is arranged at the bottom of the gas valve body, a mounting cavity is formed in the gas valve body, and a control assembly is arranged in the mounting cavity. A gas film is arranged between the installation base and the gas valve body, the bottom of the control assembly abuts against the gas film, a gas passing hole is formed in the bottom of the gas valve body, and a valve nail is arranged on the gas film.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, relates to a safety valve, and particularly relates to a leakage-proof safety valve. Background Art

[0002] Liquefied natural gas has the advantages of convenient storage and transportation as a household fuel. It is usually transported in gas cylinders in a divided manner and has a very large user base. Traditional gas valves realize gas transmission by manually controlling the switch. Since gas leakage is flammable, explosive, and likely to cause symptoms such as stuffiness and dizziness, with the development of technology, gas cut-off valves that automatically cut off the gas passage have emerged.

[0003] Low gas pressure may cause unstable gas ejection, increasing the risk of gas leakage. Gas leakage may not only cause fires or explosions but also cause serious consequences such as poisoning of personnel. Therefore, it is necessary to develop a safety valve that controls the gas passage according to pressure. Summary of the Invention

[0004] The purpose of the utility model is to provide a leakage-proof safety valve with low-pressure protection for the problems existing in the prior art.

[0005] The purpose of the utility model can be achieved by the following technical solutions: A leakage-proof safety valve, characterized in that it includes a gas valve body provided with an inlet pipe and an outlet pipe. An electromagnetic control valve is provided on the gas valve body, and an installation base is provided at the bottom of the gas valve body. An installation cavity is provided inside the gas valve body. A control assembly is provided in the installation cavity. An installation bracket is provided on the control assembly. A rotating shaft is provided on the installation bracket, and a control rod is provided on the rotating shaft. A sealing ball is hinged at the end of the control rod. The sealing ball is clamped at the orifice of the outlet pipe. A plurality of vertical limiting strips A are provided on the inner wall of the installation cavity. The installation bracket is placed between the limiting strips A. A connecting rod is provided on the sealing ball. Guide strips are provided on both sides of the connecting rod. A plurality of horizontally arranged limiting strips B are provided inside the installation cavity. An air film is provided between the installation base and the gas valve body. The bottom of the control assembly abuts against the air film, and a through hole is provided at the bottom of the gas valve body. A valve nail is provided on the air film.

[0006] In the above-mentioned leakage-proof safety valve, an adjustment cavity is provided on the installation base, and a trapezoidal spring is provided in the adjustment cavity. The top of the trapezoidal spring abuts against the air film.

[0007] In the above-mentioned leakage-proof safety valve, a partition plug is provided in the installation cavity. The bottom of the electromagnetic control valve is provided with an extension rod, and the extension rod abuts against the installation bracket.

[0008] In the above anti-leakage safety valve, a reinforcing part is provided at the bottom of the air film, and the trapezoidal spring abuts against the reinforcing part.

[0009] In the above anti-leakage safety valve, clamping grooves are provided on both the gas valve body and the mounting base, and the air film is fitted into the clamping grooves.

[0010] In the above anti-leakage safety valve, a control button is provided at the top of the electromagnetic control valve, and a connecting wire is provided on the electromagnetic control valve. A trapezoidal spring is provided between the separating plug and the electromagnetic control valve.

[0011] In the above anti-leakage safety valve, a deformation groove is provided on the valve nail, and a through arc groove is provided at the top of the valve nail.

[0012] Compared with the prior art, the anti-leakage safety valve controls the gas outlet volume by setting the air film, and connects the gas detection device through the electromagnetic control valve, so that the safety valve automatically closes the passage when detecting gas leakage. The electromagnetic control valve can also manually control the upper limit of the gas flow rate, making the gas control valve have a wider application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the anti-leakage safety valve.

[0014] Figure 2 is a schematic half-sectional structural diagram of the anti-leakage safety valve.

[0015] Figure 3 is a schematic half-sectional structural diagram of the anti-leakage safety valve.

[0016] Figure 4 is a schematic enlarged partial structural diagram of the anti-leakage safety valve.

[0017] In the figure, 1. control button; 2. electromagnetic control valve; 3. connecting wire; 4. air outlet pipe; 5. mounting base; 6. gas valve body; 7. air inlet pipe; 8. separating plug; 9. control component; 10. sealing ball; 11. mounting cavity; 12. adjusting cavity; 13. trapezoidal spring; 14. control rod; 15. reinforcing part; 16. air film; 17. air passing hole; 18. rotating shaft; 19. mounting bracket; 20. extension rod; 21. guiding strip; 22. connecting rod; 23. deformation groove; 24. valve nail; 25. clamping groove; 26. arc groove; 27. limiting strip A; 28. limiting strip B. DETAILED DESCRIPTION OF THE INVENTION

[0018] The following are specific embodiments of the present invention in combination with the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0019] AsFigure 1 , 2 As shown in Figure 3, this anti-leakage safety valve includes a gas valve body 6 provided with an intake pipe 7 and an outlet pipe 4. An electromagnetic control valve 2 is provided on the gas valve body 6, and an installation base 5 is provided at the bottom of the gas valve body 6. An installation cavity 11 is provided inside the gas valve body 6, and a control component 9 is provided in the installation cavity 11. An installation bracket 19 is provided on the control component 9, a rotating shaft 18 is provided on the installation bracket 19, and a control rod 14 is provided on the rotating shaft 18. A sealing ball 10 is hinged at the end of the control rod 14, and the sealing ball 10 is clamped at the nozzle of the outlet pipe 4. A number of vertical limiting strips A27 are provided on the inner wall of the installation cavity 11, and the installation bracket 19 is placed between the limiting strips A27. A connecting rod 22 is provided on the sealing ball 10, and guiding strips 21 are provided on both sides of the connecting rod 22. A number of horizontally arranged limiting strips B28 are provided inside the installation cavity 11. An air film 16 is provided between the installation base 5 and the gas valve body 6, the bottom of the control component 9 abuts against the air film 16, and a gas passing hole 17 is provided at the bottom of the gas valve body 6. A valve stud 24 is provided on the air film 16. Gas enters through the intake pipe 7 and squeezes the air film 16 through the gas passing hole 17, controlling the deformation of the air film 16, causing the installation bracket 19 to move downward, indirectly controlling the lateral movement of the sealing ball 10 to open the outlet pipe 4, controlling the gas outlet volume, and enabling the gas to flow out from the outlet pipe 4. When the pressure is too low, the air film 16 retracts, the installation bracket 19 moves upward and the sealing ball 10 blocks the outlet pipe 4.

[0020] Preferably, an adjustment cavity 12 is provided on the installation base 5, and a trapezoidal spring 13 is provided in the adjustment cavity 12. The top of the trapezoidal spring 13 abuts against the air film 16.

[0021] Preferably, a partition plug 8 is provided in the installation cavity 11. An extension rod 20 is provided at the bottom of the electromagnetic control valve 2, and the extension rod 20 abuts against the installation bracket 19.

[0022] Preferably, a strengthening portion 15 is provided at the bottom of the air film 16, and the trapezoidal spring 13 abuts against the strengthening portion 15.

[0023] Preferably, clamping grooves 25 are provided on both the gas valve body 6 and the installation base 5, and the air film 16 is fitted into the clamping grooves 25.

[0024] Preferably, a control button 1 is provided at the top of the electromagnetic control valve 2, and a connecting wire 3 is provided on the electromagnetic control valve 2. A trapezoidal spring 13 is provided between the partition plug 8 and the electromagnetic control valve 2. The gas detection device is connected through the connecting wire 3. When gas leakage is detected, the trolley valve is powered off, and the trapezoidal spring 13 causes the sealing ball 10 to block the outlet pipe 4. At the same time, the valve stud 24 is placed at the gas passing hole 17 to prevent the gas from squeezing the air film 16. After the leakage crisis is lifted, by pressing the control button 1, the valve stud 24 is reset and the gas can squeeze the air film 16 for normal use.

[0025] Preferably, a deformation groove 23 is provided on the valve stud 24, and a through-arc groove 26 is provided at the top of the valve stud 24. The deformation groove 23 enables the top of the valve stud 24 to deform, making it more labor-saving when passing through the air hole 17 and preventing damage to the top of the valve stud 24. The arc groove 26 prevents difficult gas entry caused by airtightness when the valve stud 24 abuts against the gas valve body 6, and at the same time can assist in deformation to enable the valve stud 24 to better pass through the past hole.

[0026] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0027] Although terms such as control button 1, electromagnetic control valve 2, connecting wire 3, air outlet pipe 4, mounting base 5, gas valve body 6, air inlet pipe 7, partition plug 8, control component 9, sealing ball 10, mounting cavity 11, adjustment cavity 12, trapezoidal spring 13, control rod 14, strengthening part 15, air film 16, air hole 17, rotating shaft 18, mounting bracket 19, extension rod 20, guiding strip 21, connecting rod 22, deformation groove 23, valve stud 24, clamping groove 25, arc groove 26, limiting strip A 27, limiting strip B 28, etc. are used more in this article, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A leak-proof safety valve, characterized in that: The invention comprises a gas valve body (6) provided with an air inlet pipe (7) and an air outlet pipe (4), the gas valve body (6) being provided with an electromagnetic control valve (2), and a mounting base (5) being provided at the bottom of the gas valve body (6), a mounting cavity (11) being provided in the gas valve body (6), a control component (9) being provided in the mounting cavity (11), a mounting bracket (19) being provided on the control component (9), a rotating shaft (18) being provided on the mounting bracket (19), and a control rod (14) being provided on the rotating shaft (18), a sealing ball (10) being hinged at the end of the control rod (14), and the sealing ball (10) being snap-connected to the pipe opening of the air outlet pipe (4) The inner wall of the installation cavity (11) is provided with a plurality of vertical limit strips A (27), the installation bracket (19) is placed between the limit strips A (27), the sealing ball (10) is provided with a connecting rod (22), both sides of the connecting rod (22) are provided with guide strips (21), a plurality of horizontally arranged limit strips B (28) are provided inside the installation cavity (11), an air film (16) is provided between the installation base (5) and the gas valve body (6), the bottom of the control component (9) is in conflict with the air film (16), and the bottom of the gas valve body (6) is provided with an air hole (17), and a valve pin (24) is provided on the air film (16).

2. The anti-leakage safety valve according to claim 1, characterized in that: An adjustment cavity (12) is provided on the mounting base (5), a trapezoidal spring (13) is provided in the adjustment cavity (12), and the top of the trapezoidal spring (13) is in contact with the air film (16).

3. The anti-leakage safety valve according to claim 1, characterized in that: A separation plug (8) is provided in the installation cavity (11), and an extension rod (20) is provided at the bottom of the electromagnetic control valve (2), and the extension rod (20) is in conflict with the installation bracket (19).

4. The anti-leakage safety valve according to claim 2, characterized in that: A reinforcing portion (15) is provided at the bottom of the air film (16), and the trapezoidal spring (13) is in conflict with the reinforcing portion (15).

5. The anti-leakage safety valve according to claim 1, characterized in that: The gas valve body (6) and the mounting base (5) are both provided with a clamping groove (25), and the gas film (16) is embedded in the clamping groove (25).

6. The anti-leakage safety valve according to claim 3, characterized in that: The electromagnetic control valve (2) is provided with a control button (1) on the top, and a connecting line (3) is provided on the electromagnetic control valve (2). A trapezoidal spring (13) is provided between the separation plug (8) and the electromagnetic control valve (2).

7. The anti-leakage safety valve according to claim 1, characterized in that: The valve pin (24) is provided with a deformation groove (23), and the top of the valve pin (24) is provided with a penetrating arc groove (26).

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