Bidirectional high-pressure butterfly valve

Abstract

The utility model discloses a two-way high pressure butterfly valve, including valve body, valve rod, valve core, lock piece and gasbag ring, valve rod is provided in the valve body, valve core is fixed on the outer wall of valve rod, the valve body inner wall of valve core position is fixed with seal ring, and the inner wall of seal ring is provided with seal ring groove, and the gasbag ring is provided with the lock piece. The air bag ring adheres to the inner wall of the sealing ring groove, a small air pump is installed on the outer wall of the top of the valve body, a control box is installed at the top end of the valve body, the outer wall of a valve rod in the control box is sleeved with a lock sleeve, convex teeth are arranged on the outer wall of the lock sleeve, and the lock blocks are arranged in the positions, on the two sides of the lock sleeve, of the control box. According to the utility model, double sealing is provided, the sealing performance is enhanced, the sealing performance can be kept under the pressure action when a medium flows reversely, the valve rod can be locked, the situation that the valve rod is loosened and cannot be closed tightly is prevented, and the medium is prevented from leaking accidentally.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a bidirectional high-pressure butterfly valve. Background Art

[0002] A butterfly valve is a simple regulating valve primarily used for on / off control of low-pressure pipeline media. Its closing element (disc or disc) is a disc that rotates around the valve axis to open and close. This valve primarily serves as a shutoff and throttling mechanism in pipelines, controlling the flow of fluids such as air, water, steam, various corrosive media, slurries, oils, liquid metals, and radioactive media. The disc-shaped disc rotates within the valve body to open, close, or regulate the flow.

[0003] Butterfly valves usually have a sealing ring on the valve core, but the sealing effect is limited to one-way sealing. When the medium flows in the opposite direction, the sealing ring is easily separated from the valve body under the action of pressure, which is prone to leakage. In addition, the valve stem lacks a locking function. After the valve core is closed, it is easy for the valve stem to loosen, resulting in a loose closure, which may cause accidental leakage of the medium. Therefore, improvement is urgently needed. Utility Model Content

[0004] The purpose of the present utility model is to provide a bidirectional high-pressure butterfly valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a two-way high-pressure butterfly valve, comprising a valve body, a valve stem, a valve core, a locking block and an air bag ring, the valve stem being arranged inside the valve body, the valve core being fixed on the outer wall of the valve stem, a sealing ring being fixed on the inner wall of the valve body at the position of the valve core, and a sealing ring groove being provided on the inner wall of the sealing ring, the air bag ring being adhered to the inner wall of the sealing ring groove, a small air pump being installed on the outer wall of the top of the valve body, a control box being installed on the top of the valve body, a locking sleeve being mounted on the outer wall of the valve stem inside the control box, and convex teeth being provided on the outer walls of the locking sleeves, the locking blocks being arranged inside the control box on both sides of the locking sleeves, a drive box being fixed on one side of the control box, and a two-way screw rod being installed inside the drive box.

[0006] Preferably, an air supply pipe is installed at the output end of the small air pump, and the bottom end of the air supply pipe is connected to the air bag ring. The small air pump inflates the air bag ring inside the sealing ring groove through the air supply pipe. The air bag ring fits tightly with the valve core and fills the gap between the valve core and the valve body, thereby enhancing the sealing performance and enabling it to maintain sealing under the pressure when the medium flows in reverse.

[0007] Preferably, an arc groove is provided on the outer wall of the locking block close to the locking sleeve, and a tooth groove is provided on the surface of the arc groove. The tooth groove cooperates with the convex teeth. The locking block clamps the locking sleeve from both sides, and the tooth groove inside the arc groove engages with the convex teeth on the outer wall of the locking sleeve to lock the valve stem, preventing the valve stem from loosening and causing a loose closure, thereby preventing accidental leakage of the medium.

[0008] Preferably, a guide rod is fixed on one side of the interior of the control box to guide the movable arm.

[0009] Preferably, a movable arm is mounted on the outer wall of the guide rod, and one end of the movable arm is fixedly connected to the locking block.

[0010] Preferably, the other end of the locking block extends to the interior of the drive box and is fixed with a slider, which is threadedly connected to the bidirectional lead screw.

[0011] Preferably, one end of the bidirectional screw rod extends to the outside of the drive box and is installed with a knob.

[0012] Preferably, the top end of the valve stem passes through the control box.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] After the butterfly valve is closed, the valve core and the sealing ring fit tightly together, which plays a sealing role. Furthermore, a small air pump inflates the air bag ring inside the sealing ring groove through the air supply pipe. The air bag ring fits tightly against the valve core and fills the gap between the valve core and the valve body, thereby enhancing the sealing performance and maintaining the sealing performance even under the pressure of the reverse flow of the medium.

[0015] The two-way screw is rotated by turning the knob, so that the slider moves along the two-way screw and drives the locking block to move through the movable arm. The guide rod guides the movable arm. The locking block clamps the locking sleeve from both sides and engages with the convex teeth on the outer wall of the locking sleeve through the tooth groove inside the arc groove. The valve stem can be locked to prevent the valve stem from loosening and causing loose closure, thereby preventing accidental leakage of the medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a side cross-sectional structural schematic diagram of the utility model;

[0017] Figure 2 This is a front view structural diagram of the utility model;

[0018] Figure 3 For the utility model Figure 1 A in the middle is an enlarged structural diagram;

[0019] Figure 4 This is a schematic diagram of the enlarged structure of the locking block of the utility model from a top view;

[0020] Figure 5 It is a schematic diagram of an enlarged top view of the cross section of the drive box of the present invention.

[0021] In the figure: 1. Valve body; 2. Valve stem; 3. Valve core; 4. Small air pump; 5. Control box; 6. Lock sleeve; 7. Drive box; 8. Bidirectional screw; 9. Slider; 10. Movable arm; 11. Lock block; 12. Sealing ring; 13. Sealing ring groove; 14. Airbag ring; 15. Air pipe; 16. Arc groove; 17. Tooth groove; 18. Protruding tooth; 19. Guide rod; 20. Knob. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-5 The utility model provides an embodiment of a bidirectional high-pressure butterfly valve, comprising a valve body 1, a valve stem 2, a valve core 3, a locking block 11, and an air bag ring 14. The valve stem 2 is arranged inside the valve body 1, and the valve core 3 is fixed to the outer wall of the valve stem 2. A sealing ring 12 is fixed to the inner wall of the valve body 1 at the position of the valve core 3, and a sealing ring groove 13 is provided on the inner wall of the sealing ring 12. The air bag ring 14 is adhered to the inner wall of the sealing ring groove 13. A small air pump 4 is installed on the outer wall of the top of the valve body 1.

[0025] A control box 5 is installed at the top of the valve body 1. A lock sleeve 6 is mounted on the outer wall of the valve stem 2 inside the control box 5. The outer wall of the lock sleeve 6 is provided with convex teeth 18. Lock blocks 11 are provided inside the control box 5 on both sides of the lock sleeve 6. A drive box 7 is fixed to one side of the control box 5, and a bidirectional screw rod 8 is installed inside the drive box 7.

[0026] An air delivery pipe 15 is installed at the output end of the small air pump 4, and the bottom end of the air delivery pipe 15 is connected to the air bag ring 14;

[0027] Specifically, the valve stem 2 drives the valve core 3 to rotate, controlling the opening and closing state of the butterfly valve. When the butterfly valve is closed, the valve core 3 fits tightly against the sealing ring 12, thus achieving a sealing effect. Furthermore, the small air pump 4 inflates the air bag ring 14 inside the sealing ring groove 13 through the air supply pipe 15. The air bag ring 14 fits tightly against the valve core 3 and fills the gap between the valve core 3 and the valve body 1, thereby enhancing the sealing performance and maintaining the sealing performance even under the pressure of the reverse flow of the medium.

[0028] An arc groove 16 is provided on the outer wall of the locking block 11 near the locking sleeve 6, and a tooth groove 17 is provided on the surface of the arc groove 16, and the tooth groove 17 cooperates with the protruding tooth 18;

[0029] An arc groove 16 is provided on the outer wall of the locking block 11 near the locking sleeve 6, and a tooth groove 17 is provided on the surface of the arc groove 16, and the tooth groove 17 cooperates with the protruding tooth 18;

[0030] A guide rod 19 is fixed to one side of the interior of the control box 5;

[0031] The outer wall of the guide rod 19 is provided with a movable arm 10, one end of which is fixedly connected to the locking block 11;

[0032] The other end of the locking block 11 extends into the interior of the drive box 7 and is fixed with a slider 9, which is threadedly connected to the bidirectional screw rod 8;

[0033] One end of the bidirectional screw rod 8 extends to the outside of the drive box 7 and is installed with a knob 20;

[0034] Specifically, the bidirectional screw rod 8 is rotated by turning the knob 20, so that the slider 9 moves along the bidirectional screw rod 8 and drives the locking block 11 to move through the movable arm 10. The guide rod 19 guides the movable arm 10. The locking block 11 clamps the locking sleeve 6 from both sides and engages with the protruding teeth 18 on the outer wall of the locking sleeve 6 through the tooth grooves 17 inside the arc groove 16. The valve stem 2 can be locked to prevent the valve stem 2 from loosening and causing a loose closure, thereby preventing accidental leakage of the medium.

[0035] The top end of the valve stem 2 passes through the control box 5 .

[0036] When the embodiment of the present application is in use: first, the valve stem 2 drives the valve core 3 to rotate to control the opening and closing state of the butterfly valve. When the butterfly valve is closed, the valve core 3 fits tightly with the sealing ring 12, which plays a sealing role. Further, the small air pump 4 inflates the air bag ring 14 inside the sealing ring groove 13 through the air supply pipe 15. The air bag ring 14 fits tightly with the valve core 3 and fills the gap between the valve core 3 and the valve body 1, enhancing the sealing performance, so that it can maintain sealing even under the pressure of reverse flow of the medium. Then, the two-way screw rod 8 is rotated by the knob 20, so that the slider 9 moves along the two-way screw rod 8 and drives the locking block 11 to move through the movable arm 10. The guide rod 19 guides the movable arm 10. The locking block 11 clamps the locking sleeve 6 from both sides and engages with the convex teeth 18 on the outer wall of the locking sleeve 6 through the tooth groove 17 inside the arc groove 16. The valve stem 2 can be locked to prevent the valve stem 2 from loosening and causing a loose closure, thereby preventing accidental leakage of the medium.

[0037] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A bidirectional high-pressure butterfly valve, characterized in that: The invention comprises a valve body (1), a valve stem (2), a valve core (3), a locking block (11) and an air bag ring (14), wherein the valve stem (2) is arranged inside the valve body (1), the valve core (3) is fixed on the outer wall of the valve stem (2), a sealing ring (12) is fixed on the inner wall of the valve body (1) at the position of the valve core (3), and a sealing ring groove (13) is arranged on the inner wall of the sealing ring (12), the air bag ring (14) is adhered to the inner wall of the sealing ring groove (13), and the valve body (1 ) is installed on the outer wall of the top of the valve body (1), a control box (5) is installed on the top of the valve body (1), a lock sleeve (6) is sleeved on the outer wall of the valve stem (2) inside the control box (5), and the outer wall of the lock sleeve (6) is provided with convex teeth (18), the locking blocks (11) are provided inside the control box (5) on both sides of the lock sleeve (6), a drive box (7) is fixed on one side of the control box (5), and a bidirectional screw rod (8) is installed inside the drive box (7).

2. A bidirectional high-pressure butterfly valve according to claim 1, characterized in that: An air delivery pipe (15) is installed at the output end of the small air pump (4), and the bottom end of the air delivery pipe (15) is connected to the air bag ring (14).

3. A bidirectional high-pressure butterfly valve according to claim 1, characterized in that: An arc groove (16) is provided on the outer wall of the locking block (11) on the side close to the locking sleeve (6), and a tooth groove (17) is provided on the surface of the arc groove (16), and the tooth groove (17) and the protruding tooth (18) cooperate with each other.

4. A bidirectional high-pressure butterfly valve according to claim 1, characterized in that: A guide rod (19) is fixed to one side of the interior of the control box (5).

5. A bidirectional high-pressure butterfly valve according to claim 4, characterized in that: A movable arm (10) is mounted on the outer wall of the guide rod (19), and one end of the movable arm (10) is fixedly connected to the locking block (11).

6. A bidirectional high-pressure butterfly valve according to claim 5, characterized in that: The other end of the locking block (11) extends to the interior of the drive box (7) and is fixed with a slider (9), which is threadedly connected to the bidirectional screw rod (8).

7. The bidirectional high-pressure butterfly valve according to claim 1, characterized in that: One end of the bidirectional screw rod (8) extends to the outside of the drive box (7) and is provided with a knob (20).

8. The bidirectional high-pressure butterfly valve according to claim 1, characterized in that: The top end of the valve stem (2) passes through the control box (5).

Images