Multi-layer metal sealing butterfly valve

Abstract

The utility model discloses a multi-layer metal sealing butterfly valve, relates to the technical field of butterfly valves, and provides the following scheme aiming at the problems that in the prior art, a gap generally exists between a sealing ring and a valve body, so that the sealing effect is not ideal, and the sealing effect of the butterfly valve can be influenced: the multi-layer metal sealing butterfly valve comprises a fixed pipe, and a T-shaped seat is inserted and fixed at the top of the fixed pipe; a rotating rod is arranged at the top of the T-shaped seat, a connecting rod is fixed to the bottom end of the rotating rod, and a disc is fixed to the bottom end of the connecting rod. The rotating rod drives the disc to rotate through the connecting rod, when the rubber ring on the outer wall of the disc abuts against the inner wall of the fixing pipe, the sealing rings on the two sides abut against the outer walls of the two sides of the disc under elastic pushing of the telescopic spring, the sealing performance in the fixing pipe is improved, and the disc rotates again in the fixing pipe, so that the sealing performance of the fixing pipe is improved. And the disc pushes the sealing ring to move away, so that a passing opening is formed, and normal circulation can be performed in the fixed pipe.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and in particular to a multi-layer metal-sealed butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve used for on / off control of low-pressure pipeline media. A butterfly valve is characterized by its closing element (valve disc or butterfly plate) being a disk that rotates around a valve shaft to open and close. Valves can be used to control the flow of various types of fluids, including air, water, steam, various corrosive media, slurry, oil, liquid metals, and radioactive media. In pipelines, they primarily function as shut-off and throttling devices. The butterfly valve's opening and closing element is a disc-shaped butterfly plate that rotates around its own axis within the valve body, thereby achieving opening, closing, or regulation.

[0003] In current butterfly valves, there is usually a gap between the sealing ring and the valve body, which leads to an unsatisfactory sealing effect and affects the sealing performance of the butterfly valve. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a multi-layer metal sealing butterfly valve, which overcomes the shortcomings of the prior art and effectively solves the problem that there is usually a gap between the sealing ring and the valve body in the prior art, which leads to an unsatisfactory sealing effect and affects the sealing effect of the butterfly valve.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-layer metal-sealed butterfly valve includes a fixed pipe, a T-shaped seat is inserted and fixed to the top of the fixed pipe, and a rotating rod is provided on the top of the T-shaped seat. A connecting rod is fixed to the bottom end of the rotating rod, and a disc is fixed to the bottom end of the connecting rod. A rubber ring is embedded in the annular outer wall of the disc, and sealing rings are provided on both sides of the outer wall of the disc. Insert rods are fixed on both sides of the outer wall of the sealing rings, and each insert rod is inserted into and slidably connected to a connecting block fixed to the inner wall of the fixed pipe. A telescopic spring is movably sleeved on the rod wall of the insert rod.

[0007] By rotating the handle, the worm gear is driven to rotate. The rotating worm gear drives the rotating rod to rotate through the meshing worm wheel. The rotating rod drives the disc to rotate through the connecting rod. When the rubber ring on the outer wall of the disc abuts against the inner wall of the fixed tube, the elastic push of the telescopic spring causes the sealing rings on both sides to abut against the outer walls of the disc, improving the sealing performance inside the fixed tube. As the disc rotates again inside the fixed tube, it pushes the sealing rings away, thus creating a passage and allowing normal flow inside the fixed tube.

[0008] Preferably, flanges are fitted and fixed to both ends of the outer wall of the fixed tube, and a top shell is connected to the top of the T-shaped seat.

[0009] The fixed pipe is connected and fixed to the external pipeline by a flange, and the top of the T-shaped seat is covered by a top shell.

[0010] Preferably, a worm gear is fixedly sleeved on the wall of the rotating rod, and a worm is provided on one side of the worm gear for mutual meshing.

[0011] The rotating worm drives the rotating rod to rotate through the meshing worm wheels.

[0012] Preferably, both ends of the worm gear are rotatably connected to mounting blocks fixed to the top of the T-shaped seat, and one end of the worm gear is connected to a rotating handle.

[0013] The worm gear is rotated by turning the rotary handle.

[0014] Preferably, a connecting pipe is inserted and fixed inside the T-shaped seat, and the connecting pipe and the connecting rod form a rotational fit.

[0015] The connecting rod can rotate freely within the T-shaped seat via the connecting tube.

[0016] Preferably, the two ends of the telescopic spring abut against the connecting block and the sealing ring respectively, and the annular outer wall of the sealing ring forms a sealing fit with the inner wall of the fixing tube.

[0017] The elastic expansion and contraction of the telescopic spring, combined with the change in the position of the sealing ring inside the fixed tube, is achieved.

[0018] The beneficial effects of the utility model are:

[0019] The rotating rod drives the disc to rotate via the connecting rod. When the rubber ring on the outer wall of the disc abuts against the inner wall of the fixed tube, the elastic push of the telescopic spring causes the sealing rings on both sides to abut against the outer walls of the disc, improving the sealing performance inside the fixed tube. As the disc rotates again inside the fixed tube, it pushes the sealing rings away, creating an opening that allows normal flow inside the fixed tube. This effectively solves the problem in existing technologies where there is usually a gap between the sealing ring and the valve body, resulting in an unsatisfactory sealing effect that affects the sealing performance of the butterfly valve. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a multi-layer metal sealing butterfly valve proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of the top structure of the T-shaped seat of a multi-layer metal sealing butterfly valve proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the fixed pipe of a multi-layer metal sealing butterfly valve proposed in this utility model.

[0023] In the diagram: 1. Fixed pipe; 2. Flange; 3. T-slot; 4. Top shell; 5. Rotating rod; 6. Worm gear; 7. Worm; 8. Mounting block; 9. Rotating handle; 10. Connecting rod; 11. Connecting pipe; 12. Disc; 13. Rubber ring; 14. Sealing ring; 15. Insert rod; 16. Connecting block; 17. Telescopic spring. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] Example:

[0026] Reference Figure 1-3 A multi-layer metal-sealed butterfly valve includes a fixed pipe 1, a T-shaped seat 3 fixedly inserted to the top of the fixed pipe 1, a rotating rod 5 set on the top of the T-shaped seat 3, a connecting rod 10 fixed to the bottom end of the rotating rod 5, a disc 12 fixed to the bottom end of the connecting rod 10, a rubber ring 13 embedded in the annular outer wall of the disc 12, a sealing ring 14 set on both sides of the outer wall of the disc 12, an insert rod 15 fixed on both sides of the outer wall of the sealing ring 14, a connecting block 16 fixed to the inner wall of the fixed pipe 1 inserted into the insert rod 15, and a telescopic spring 17 movably sleeved on the rod wall of the insert rod 15.

[0027] Flanges 2 are fitted and fixed to both ends of the outer wall of the fixed pipe 1. A top shell 4 is connected to the top of the T-shaped seat 3. The fixed pipe 1 is connected and fixed to the external pipe through the flanges 2. The top shell 4 covers the top of the T-shaped seat 3. A worm gear 6 is fitted and fixed to the rod wall of the rotating rod 5. A worm 7 is provided on one side of the worm gear 6. The rotating worm 7 drives the rotating rod 5 to rotate through the worm gear 6. Mounting blocks 8 fixed to the top of the T-shaped seat 3 are rotatably connected to both ends of the rod wall of the worm 7. A rotating handle 9 is connected to one end of the worm 7. The worm 7 is rotated by rotating the rotating handle 9.

[0028] A connecting pipe 11 is inserted and fixed inside the T-shaped seat 3. The connecting pipe 11 and the connecting rod 10 form a rotational fit. The connecting rod 10 can rotate freely inside the T-shaped seat 3 through the connecting pipe 11. The two ends of the telescopic spring 17 abut against the connecting block 16 and the sealing ring 14 respectively. The annular outer wall of the sealing ring 14 forms a sealing fit with the inner wall of the fixed pipe 1. The elastic expansion and contraction of the telescopic spring 17 changes the position of the sealing ring 14 inside the fixed pipe 1.

[0029] Working principle:

[0030] During operation, rotating the handle 9 drives the worm gear 7 to rotate. The rotating worm gear 7 drives the rotating rod 5 to rotate through the meshing worm wheel 6. The rotating rod 5 drives the disc 12 to rotate through the connecting rod 10. When the rubber ring 13 on the outer wall of the disc 12 abuts against the inner wall of the fixed tube 1, the elastic push of the telescopic spring 17 causes the sealing rings 14 on both sides to abut against the outer walls of the disc 12, improving the sealing performance inside the fixed tube 1. As the disc 12 rotates again inside the fixed tube 1, the disc 12 pushes the sealing rings 14 away, thus creating a passage opening, allowing normal flow inside the fixed tube 1.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-layer metal-sealed butterfly valve, comprising a fixed pipe (1), characterized in that, A T-shaped seat (3) is inserted and fixed to the top of the fixed tube (1), and a rotating rod (5) is provided on the top of the T-shaped seat (3). A connecting rod (10) is fixed to the bottom end of the rotating rod (5), and a disc (12) is fixed to the bottom end of the connecting rod (10). A rubber ring (13) is embedded in the annular outer wall of the disc (12), and a sealing ring (14) is provided on both sides of the outer wall of the disc (12). Insert rods (15) are fixed on both sides of the outer wall of the sealing rings (14), and a connecting block (16) fixed to the inner wall of the fixed tube (1) is inserted and slidably connected to the insert rods (15). A telescopic spring (17) is movably sleeved on the rod wall of the insert rod (15).

2. The multi-layer metal-sealed butterfly valve according to claim 1, characterized in that, The outer walls of the fixed pipe (1) are fitted with flanges (2) at both ends, and the top of the T-shaped seat (3) is connected to a top shell (4).

3. A multi-layer metal-sealed butterfly valve according to claim 1, characterized in that, The rotating rod (5) has a worm gear (6) fixedly sleeved on its wall, and a worm (7) meshing with each other is provided on one side of the worm gear (6).

4. A multi-layer metal-sealed butterfly valve according to claim 3, characterized in that, Both ends of the worm (7) are rotatably connected to mounting blocks (8) fixed to the top of the T-shaped seat (3), and one end of the worm (7) is connected to a rotating handle (9).

5. A multi-layer metal-sealed butterfly valve according to claim 1, characterized in that, A connecting pipe (11) is inserted and fixed inside the T-shaped seat (3), and the connecting pipe (11) and the connecting rod (10) form a rotational fit.

6. A multi-layer metal-sealed butterfly valve according to claim 1, characterized in that, The two ends of the telescopic spring (17) abut against the connecting block (16) and the sealing ring (14) respectively, and the annular outer wall of the sealing ring (14) forms a sealing fit with the inner wall of the fixed tube (1).

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