Gas valve with leak-proof function

Abstract

The utility model discloses a gas valve with a leakproof function, which comprises a valve body A and a valve body B. The two ends of the valve body A are both provided with the valve body B, the valve body B is fixedly connected with the valve body A. The top end of the valve body A is provided with a driving seat, the inside of the valve body B is symmetrically provided with supporting frames, the supporting frames are fixedly connected with the valve body B, and the supporting frames are fixedly connected with the valve body A. A plugging block is arranged between the two sets of supporting frames, sliding rods are arranged on the two sides of the plugging block, the two sets of sliding rods are slidably connected with the two sets of supporting frames correspondingly, springs are arranged on the surfaces of the sliding rods on the left side of the plugging block, the two ends of the springs are connected with the plugging block and the supporting frames correspondingly, and a worm is arranged in the driving base; and the worm is movably connected with the driving seat. According to the utility model, not only is convenient multiple plugging realized to prevent gas leakage, but also the gas backflow and leakage are conveniently prevented, and the gas leakage prevention effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of gas valve technology, specifically a gas valve with anti-leakage function. Background Technology

[0002] A gas valve is a type of valve controlled by pneumatic principles, primarily used to control fluid flow. It typically consists of an electric drive and a pneumatic control system. The electric drive provides power, while the pneumatic control performs the control function. When an external control signal changes, the electric drive converts air pressure into force, which is used to regulate the flow rate by controlling the valve size, thereby achieving the purpose of fluid control. If the valve leaks during gas transportation, it will cause environmental pollution. To prevent gas leakage during transportation, a gas valve with leak-proof function has been proposed.

[0003] For example, a gas valve with anti-leakage function disclosed in the authorization announcement number CN221401686U includes a protective shell, a threaded hole is opened on the side wall of the protective shell, a threaded rod is threaded through the internal thread of the threaded hole, a rotating wheel is fixedly connected to the outer wall of the threaded rod, a rubber ring is fixedly connected to the outer wall of the threaded rod away from the rotating wheel, a sealing strip is sleeved on the outer wall of the rubber ring, and a sealing block is fixedly connected to the side wall adjacent to the rubber ring and the sealing strip.

[0004] Although it achieves the effect of turning the wheel clockwise when the valve needs to be opened, the threaded rod will drive the rubber ring, sealing strip and sealing block outward until they contact the side plate, and then natural gas can flow from pipeline one through the exhaust pipe to pipeline two. When closing the valve, it is only necessary to turn the wheel counterclockwise until the sealing strip is embedded in the inner groove and the sealing block blocks the inner cavity of the protective cover to complete the seal. This device has good sealing performance and is relatively safe to use.

[0005] However, this does not solve the problem that existing gas valves are not convenient for multiple sealing to prevent gas leakage, nor are they effective in preventing gas backflow and leakage, thus affecting the gas leak prevention effect. Utility Model Content

[0006] The purpose of this utility model is to provide a gas valve with anti-leakage function to solve the problems mentioned in the background art, such as the inconvenience of multiple sealing to prevent gas leakage, the difficulty in preventing gas backflow and leakage, and the impact on the gas leakage prevention effect.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a gas valve with anti-leakage function, comprising valve body A and valve body B, wherein valve body B is provided at both ends of valve body A and valve body B is fixedly connected to valve body A, a drive seat is installed at the top of valve body A, and support frames are symmetrically installed inside valve body B and the support frames are fixedly connected to valve body B, and a sealing block is provided between the two sets of support frames, wherein sliding rods are provided on both sides of the sealing block and the two sets of sliding rods are slidably connected to the two sets of support frames respectively, and springs are provided on the surface of the sliding rods on the left side of the sealing block, and the two ends of the springs are respectively connected to the sealing block and the support frame.

[0008] Preferably, the drive seat has a worm gear inside, and the worm gear is movably connected to the drive seat.

[0009] Preferably, a handwheel is provided on the outer wall of the drive seat, and the handwheel is connected to the worm gear.

[0010] Preferably, a movable shaft is movably mounted inside the drive seat on one side of the worm gear, and the movable shaft extends into the interior of valve body A and is movably connected to valve body A.

[0011] Preferably, a worm wheel is fitted onto the surface of the movable shaft on one side of the worm, and the worm wheel meshes with the worm.

[0012] Preferably, a valve plate is mounted on the surface of the movable shaft inside the valve body A, and a sealing ring is mounted on the inner wall of the valve body A on one side of the valve plate, and the valve plate and the sealing ring are slidably connected.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the gas valve not only realizes convenient multiple sealing to prevent gas leakage and facilitates the prevention of gas backflow leakage, but also improves the gas leakage prevention effect;

[0014] By installing valve bodies B at both ends of valve body A, with the installation direction of valve bodies B being consistent, and connecting the two sets of valve bodies B to the inlet pipe and outlet pipe respectively, when gas needs to be delivered, gas is input through the inlet pipe. Turning the handwheel drives the worm gear, which in turn drives the worm wheel, which in turn drives the movable shaft. The movable shaft causes the valve plate to slide on the surface of the sealing ring, where the sealing ring provides sealing support for the valve plate and valve body A. Under the action of gas pressure, the gas drives the sealing block to move inside valve body B, and the sealing block compresses the spring to open the internal passage of valve body B. The gas flows through valve body B - valve body A - valve body B. When gas delivery is not required, the gas source is shut off. Under the elastic action of the spring, the spring drives the sealing block to reset and seal the internal channel of valve body B, preventing gas from flowing back into the inlet pipe and thus avoiding gas leakage. Reverse rotation of the handwheel drives the valve plate to reset, and the sealing ring and valve plate seal the internal channel of valve body A, further preventing gas leakage. This achieves convenient multi-seal prevention of gas leakage, effectively preventing gas backflow and leakage, and improving the gas leak prevention effect. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a side view sectional structural diagram of valve body A of this utility model;

[0017] Figure 3 This is a three-dimensional perspective view of the B valve body of this utility model;

[0018] Figure 4 This is a front view cross-sectional structural diagram of the B valve body of this utility model.

[0019] In the diagram: 1. Valve body A; 2. Valve body B; 3. Drive seat; 4. Worm gear; 5. Worm wheel; 6. Handwheel; 7. Movable shaft; 8. Sealing ring; 9. Valve plate; 10. Blocking block; 11. Support frame; 12. Slide rod; 13. Spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] Please see Figure 1-4An embodiment of this utility model provides a gas valve with anti-leakage function, including valve body A 1 and valve body B 2. Both ends of valve body A 1 are provided with valve body B 2, and valve body B 2 is fixedly connected to valve body A 1. A drive seat 3 is installed at the top of valve body A 1. Support frames 11 are symmetrically installed inside valve body B 2, and the support frames 11 are fixedly connected to valve body B 2. A sealing block 10 is provided between the two sets of support frames 11. Slide rods 12 are provided on both sides of the sealing block 10, and the two sets of slide rods 12 are slidably connected to the two sets of support frames 11 respectively. Springs 13 are provided on the surface of the slide rods 12 on the left side of the sealing block 10, and the two ends of the springs 13 are connected to the sealing block 10 and the support frame 11 respectively.

[0022] The drive seat 3 is equipped with a worm gear 4 inside, and the worm gear 4 is movably connected to the drive seat 3. The drive seat 3 is equipped with a handwheel 6 on its outer wall, and the handwheel 6 is connected to the worm gear 4.

[0023] A movable shaft 7 is movably installed inside the drive seat 3 on one side of the worm 4, and the movable shaft 7 extends into the interior of valve body 1 and is movably connected to valve body 1. A worm wheel 5 is fitted on the surface of the movable shaft 7 on one side of the worm 4, and the worm wheel 5 meshes with the worm 4.

[0024] A valve plate 9 is mounted on the surface of the movable shaft 7 inside valve body 1. A sealing ring 8 is mounted on the inner wall of valve body 1 on one side of valve plate 9, and valve plate 9 and sealing ring 8 are slidably connected.

[0025] The B valve bodies 2 are installed at both ends of the A valve body 1, with the installation directions of the B valve bodies 2 being consistent. The two sets of B valve bodies 2 are connected to the inlet pipe and outlet pipe, respectively. When gas needs to be delivered, gas is input through the inlet pipe. Turning the handwheel 6 rotates the worm gear 4. Under the meshing of the worm gear 4 and worm wheel 5, the worm gear 4 drives the worm wheel 5 to rotate, which in turn drives the movable shaft 7 to rotate. The movable shaft 7 causes the valve plate 9 to slide on the surface of the sealing ring 8. The sealing ring 8 provides sealing support for the valve plate 9 and the A valve body 1. Under the action of gas pressure, and with the sliding cooperation between the slide rod 12 and the support frame 11, the gas drives the sealing block 10 to move inside the B valve body 2. The sealing block 10 compresses the spring 1. 3. Open the internal channel of valve body 2 (B). The gas flow sequence is B valve body 2 - A valve body 1 - B valve body 2. When gas supply is not required, shut off the gas source. Under the elastic cooperation of spring 13, spring 13 drives the sealing block 10 to reset and seal the internal channel of valve body 2, preventing gas from flowing back into the inlet pipe and thus avoiding gas leakage. Turn handwheel 6 in the opposite direction, which drives valve plate 9 to rotate and reset. Under the sealing support of sealing ring 8, sealing ring 8 and valve plate 9 seal the internal channel of valve body 1, further preventing gas leakage. This achieves convenient multi-seal to prevent gas leakage, facilitates the prevention of gas backflow and leakage, and improves the gas leakage prevention effect.

[0026] Working principle: Valve bodies 2 (B-type) are installed at both ends of valve body 1 (A-type), with the installation direction of B-type valve bodies 2 aligned. The two sets of B-type valve bodies 2 are connected to the inlet pipe and outlet pipe, respectively. When gas needs to be delivered, gas is input through the inlet pipe. Turning the handwheel 6 rotates the worm gear 4, which in turn rotates the movable shaft 7. The movable shaft 7 causes the valve plate 9 to slide on the surface of the sealing ring 8. The sealing ring 8 provides sealing support for the valve plate 9 and valve body 1 (A-type). Under the action of gas pressure, and with the sliding cooperation between the slide rod 12 and the support frame 11, the gas drives the sealing block 10 to move inside the B-type valve body 2, thus sealing the valve. The plug 10 compresses the spring 13 to open the internal passage of valve body 2. The gas flows through valve body 2-valve body 1-valve body 2 in the following order. When gas delivery is not required, the gas source is shut off. Under the elastic cooperation of the spring 13, the spring 13 drives the plug 10 to reset and seal the internal passage of valve body 2, preventing the gas inside the gas delivery pipe from flowing back into the gas inlet pipe, thereby avoiding gas leakage. The handwheel 6 is rotated in the opposite direction, and the handwheel 6 drives the valve plate 9 to rotate and reset. Under the sealing support of the sealing ring 8, the sealing ring 8 and the valve plate 9 seal the internal passage of valve body 1, further preventing gas leakage.

Claims

1. A gas valve with anti-leakage function, comprising valve body A (1) and valve body B (2), characterized in that: Both ends of valve body A (1) are provided with valve body B (2), and valve body B (2) is fixedly connected to valve body A (1). A drive seat (3) is installed at the top of valve body A (1). Support frames (11) are symmetrically installed inside valve body B (2), and support frames (11) are fixedly connected to valve body B (2). A blocking block (10) is provided between the two sets of support frames (11). Slide rods (12) are provided on both sides of the blocking block (10), and the two sets of slide rods (12) are slidably connected to the two sets of support frames (11). Springs (13) are provided on the surface of the slide rods (12) on the left side of the blocking block (10), and the two ends of the springs (13) are connected to the blocking block (10) and the support frame (11) respectively.

2. A gas valve with anti-leakage function according to claim 1, characterized in that: The drive seat (3) is provided with a worm gear (4) inside, and the worm gear (4) is movably connected to the drive seat (3).

3. A gas valve with anti-leakage function according to claim 1, characterized in that: A handwheel (6) is provided on the outer wall of the drive seat (3), and the handwheel (6) is connected to the worm gear (4).

4. A gas valve with anti-leakage function according to claim 2, characterized in that: A movable shaft (7) is movably installed inside the drive seat (3) on one side of the worm (4), and the movable shaft (7) extends into the interior of valve body (1) and is movably connected to valve body (1).

5. A gas valve with anti-leakage function according to claim 2, characterized in that: A worm wheel (5) is fitted on the surface of the movable shaft (7) on one side of the worm (4), and the worm wheel (5) meshes with the worm (4).

6. A gas valve with anti-leakage function according to claim 1, characterized in that: A valve plate (9) is installed on the surface of the movable shaft (7) inside the valve body (1). A sealing ring (8) is installed on the inner wall of the valve body (1) on one side of the valve plate (9), and the valve plate (9) and the sealing ring (8) are slidably connected.

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