Flange butterfly valve of high-performance sealing structure

Abstract

The utility model relates to the technical field of butterfly valves, and discloses a flange butterfly valve with a high-performance sealing structure, which comprises a valve body, a support frame is fixedly connected to the top of the inner side of the valve body, a hinge is fixedly connected to the left side of the support frame, a baffle is fixedly connected to the other end of the hinge, and a fixing rod is fixedly connected to the top of the inner side of the valve body. A limiting block is slidably connected into the fixing rod, a sliding rod is fixedly connected to the bottom of the limiting block, a check block is fixedly connected to the bottom of the sliding rod, a spring is fixedly connected to the top of the inner side of the fixing rod, flange plates are fixedly connected to the two ends of the valve body, and a butterfly plate is rotatably connected into the valve body. According to the utility model, through the cooperation among the support frame, the hinge, the baffle, the fixed rod, the limiting block, the sliding rod, the stop block, the spring and the sealing belt, the backflow of liquid is prevented, the flow can be kept stable, and the process interruption or disorder caused by the backflow of the liquid is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a flange butterfly valve with a high-performance sealing structure. Background Art

[0002] The flange butterfly valve is a common industrial valve with a simple and efficient design. The butterfly plate is located in the pipeline and controls the flow of fluid by rotating. When the butterfly plate is parallel to the direction of the fluid, the valve opens to allow the fluid to pass; when the valve disc is perpendicular to the direction of the fluid, the valve closes to prevent the flow of fluid. The flange connection makes installation and maintenance relatively simple, and the characteristics of the valve disc design make the flange butterfly valve superior in terms of quickly cutting off the flow of fluid and reducing pressure drop. This valve is widely used in industrial fields such as petroleum, chemical, electric power, and metallurgy, and is suitable for flow control of various liquids.

[0003] After searching, Chinese patent announcement number: CN218152402U discloses a flange butterfly valve with high performance sealing structure, including a connecting component with a driving component fixedly installed on the outer edge surface, the connecting component includes a valve body with an arc-shaped protrusion centrally constructed on the inner edge surface, and connecting pipes symmetrically and detachably installed at both ends of the valve body, the connecting pipe is configured with a sealing ring that can abut against the arc-shaped protrusion at one end facing the valve body, an annular sealing gasket is symmetrically bonded and fixed on one side of the sealing ring facing the arc-shaped protrusion, both ends of the arc-shaped protrusion are provided with sealing grooves for the annular sealing gasket to abut and seal, an inner cavity is provided in the arc-shaped protrusion in the form of an annular array, two pressure plates are symmetrically and movably installed in the inner cavity, a pressure spring is fixedly installed between the two pressure plates, and a pressure rod is centrally constructed on the opposite sides of the two pressure plates. The flange butterfly valve with high performance sealing structure has a reasonable structure, is convenient for improving the meshing effect between bolts, improves sealing performance, and has strong practicality.

[0004] The above technology achieves sealing by connecting the valve body and the connecting pipe, with the sealing ring abutting the side of the arc-shaped protrusion, and at the same time making the annular sealing gasket abut the sealing grooves opened on both sides of the arc-shaped protrusion. However, the above technology does not have a device to prevent liquid reflux. Liquid reflux will cause the process to be obstructed, affecting normal production and operation. Therefore, a flange butterfly valve with a high-performance sealing structure is proposed to solve the above problem. Utility Model Content

[0005] In order to make up for the above deficiencies, the utility model provides a flange butterfly valve with a high-performance sealing structure, aiming to improve the problem in the prior art that liquid backflow cannot be prevented, resulting in obstruction of the process.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a flange butterfly valve with a high-performance sealing structure, including a valve body, a support frame is fixedly connected to the top inner side of the valve body, a hinge is fixedly connected to the left side of the support frame, a baffle is fixedly connected to the other end of the hinge, a fixing rod is fixedly connected to the top inner side of the valve body, a limiting block is slidably connected to the inside of the fixing rod, a sliding rod is fixedly connected to the bottom of the limiting block, a baffle is fixedly connected to the bottom of the sliding rod, a spring is fixedly connected to the top inner side of the fixing rod, flanges are fixedly connected to both ends of the valve body, a butterfly plate is rotatably connected to the inside of the valve body, a driving rod is fixedly connected to the top of the butterfly plate, a rotating box is fixedly connected to the top of the driving rod, and a support assembly is provided at the bottom of the valve body.

[0007] Further, the support assembly includes a support seat, the support seat is fixedly connected to the bottom of the valve body, a plurality of telescopic rods are fixedly connected to the bottom of the support seat, a plurality of telescopic rods are fixedly connected to the bottom of a base, a plurality of sliders are slidably connected to the bottom of the support seat, a plurality of sliders are rotatably connected to the bottom of the sliders, two connecting blocks are slidably connected to the top of the base, both ends of the two connecting blocks are fixedly connected to sliders 2, and a plurality of connecting blocks are rotatably connected to the bottoms of the plurality of connecting rods.

[0008] Furthermore, two brackets 2 are fixedly connected to the top of the base, and a worm is rotatably connected inside the two brackets 2. The outer periphery of the worm is meshingly connected to a worm wheel, and a bidirectional threaded rod is fixedly connected inside the worm wheel. The outer periphery of the bidirectional threaded rod is threadedly connected inside the two connecting blocks.

[0009] Furthermore, a sealing belt is fixedly connected to the outer periphery of the baffle, and sealing rings are fixedly connected to the inside of the two flanges.

[0010] Furthermore, the bottom of the spring is fixedly connected to the top of the limiting block, and the sliding rod is slidably connected to the bottom of the fixing rod.

[0011] Furthermore, a plurality of the sliders 2 are all slidably connected to the top of the base.

[0012] Furthermore, both ends of the bidirectional threaded rod are rotatably connected to bracket one, and the bottoms of the two brackets one are fixedly connected to the top of the base.

[0013] Furthermore, a handle is fixedly connected to the rear end of the worm.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, through the cooperation among the support frame, hinge, baffle, fixed rod, limit block, sliding rod, baffle, spring and sealing belt, when the liquid is flowing forward, the liquid can push open the baffle to flow, and when the liquid is flowing back, the baffle will block the backflow of the liquid. By preventing the backflow of the liquid, the process can be ensured to remain stable, avoiding process interruption or confusion caused by fluid backflow, which is conducive to improving production efficiency.

[0016] 2. In the utility model, through the coordination among the support seat, telescopic rod, base, slider 1, connecting rod, slider 2, connecting block, bidirectional threaded rod, worm gear, worm and handle, because flange butterfly valve is generally heavy, directly connecting between two pipes will cause excessive pressure on the two pipes and damage them, the position of the base is adjusted by rotating the handle, and the base is supported on the ground to reduce the pressure on the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional schematic diagram of a flange butterfly valve with a high-performance sealing structure proposed by the utility model;

[0018] Figure 2 A schematic diagram of the structure of a valve body of a flange butterfly valve with a high-performance sealing structure proposed by the utility model;

[0019] Figure 3 A schematic diagram of the structure of a fixed rod of a flange butterfly valve with a high-performance sealing structure proposed by the utility model;

[0020] Figure 4 A schematic diagram of the structure of a support seat of a flange butterfly valve with a high-performance sealing structure proposed by the utility model;

[0021] Figure 5 The utility model provides a schematic structural diagram of a worm gear of a flange butterfly valve with a high-performance sealing structure.

[0022] Legend:

[0023] 1. Valve body; 2. Support frame; 3. Hinge; 4. Baffle; 5. Fixed rod; 6. Limit block; 7. Sliding rod; 8. Block; 9. Spring; 10. Sealing belt; 11. Flange; 12. Sealing ring; 13. Butterfly plate; 14. Driving rod; 15. Rotating box; 16. Support seat; 17. Telescopic rod; 18. Base; 19. Slider 1; 20. Connecting rod; 21. Slider 2; 22. Connecting block; 23. Bidirectional threaded rod; 24. Bracket 1; 25. Worm gear; 26. Worm; 27. Bracket 2; 28. Handle. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Reference Figure 1-3 , the utility model provides an embodiment: a flange butterfly valve with a high-performance sealing structure, including a valve body 1, a support frame 2 is fixedly connected to the top of the inner side of the valve body 1, a hinge 3 is fixedly connected to the left side of the support frame 2, and a baffle 4 is fixedly connected to the other end of the hinge 3, a fixing rod 5 is fixedly connected to the top of the inner side of the valve body 1, a limiting block 6 is slidably connected inside the fixing rod 5, a sliding rod 7 is fixedly connected to the bottom of the limiting block 6, a baffle 8 is fixedly connected to the bottom of the sliding rod 7, a spring 9 is fixedly connected to the top of the inner side of the fixing rod 5, flanges 11 are fixedly connected to both ends of the valve body 1, a butterfly plate 13 is rotatably connected inside the valve body 1, a driving rod 14 is fixedly connected to the top of the butterfly plate 13, and a rotating box 15 is fixedly connected to the top of the driving rod 14, a supporting assembly is arranged at the bottom of the valve body 1, a sealing belt 10 is fixedly connected to the outer periphery of the baffle 4, sealing rings 12 are fixedly connected to the insides of the two flanges 11, the bottom of the spring 9 is fixedly connected to the top of the limiting block 6, and the sliding rod 7 is slidably connected to the bottom of the fixing rod 5.

[0026] Specifically, a support frame 2 is fixed inside the valve body 1 to support the baffle 4. The baffle 4 is connected to the support frame 2 through a hinge 3. The hinge 3 is on the left side of the support frame 2, so that when the liquid flows to the left, the baffle 4 can be squeezed open. When the liquid flows to the right, it will not be squeezed open to prevent the liquid from flowing back. The fixed rod 5 is fixed to the top of the inner side of the valve body 1 to support the internal parts. A limit block 6 slides inside the fixed rod 5. A sliding rod 7 is fixed at the bottom of the limit block 6 to prevent the sliding rod 7 from sliding out of the fixed rod 5. The stopper 8 is fixed at the bottom of the sliding rod 7 to prevent the baffle 4 from opening at a too large angle, thereby preventing the baffle 4 from opening at a too large angle. When backflow occurs, the baffle 4 cannot be closed. The spring 9 is fixed inside the fixing rod 5 to prevent the baffle 4 from being crushed by the baffle 8, and the spring 9 will release the tension to close the baffle 4 faster, reducing the probability of liquid backflow. A sealing belt 10 is fixed to the outer periphery of the baffle 4 to enhance the overall sealing effect. Flanges 11 are fixed at both ends of the valve body 1 for connection with the pipeline. A sealing ring 12 is fixed inside the flange 11 to further enhance the overall sealing effect. The butterfly plate 13, the driving rod 14 and the rotating box 15 are existing mechanisms, which control the on-off of the fluid by rotation inside the flange butterfly valve.

[0027] Reference Figure 4-5The support assembly includes a support seat 16, which is fixedly connected to the bottom of the valve body 1, and a plurality of telescopic rods 17 are fixedly connected to the bottom of the support seat 16, and a base 18 is fixedly connected to the bottom of the plurality of telescopic rods 17, and a plurality of sliders 19 are slidably connected to the bottom of the support seat 16, and a plurality of sliders 19 are rotatably connected to the bottom of the connecting rod 20, and two connecting blocks 22 are slidably connected to the top of the base 18, and both ends of the two connecting blocks 22 are fixedly connected to the slider 21, and the plurality of connecting blocks 22 are rotatably connected to the bottom of the plurality of connecting rods 20, and the base Two brackets 27 are fixedly connected to the top of 18, and a worm 26 is rotatably connected inside the two brackets 27. The outer periphery of the worm 26 is meshed with a worm wheel 25, and a two-way threaded rod 23 is fixedly connected inside the worm wheel 25. The outer periphery of the two-way threaded rod 23 is threadedly connected inside two connecting blocks 22. Multiple sliders 21 are slidably connected to the top of the base 18, and both ends of the two-way threaded rod 23 are rotatably connected to brackets 1 24. The bottoms of the two brackets 1 24 are fixedly connected to the top of the base 18, and a hand 28 is fixedly connected to the rear end of the worm 26.

[0028] Specifically, the support seat 16 is fixed to the bottom of the valve body 1 for supporting the valve body 1. The support seat 16 is fixed to the base 18 through the telescopic rod 17 for supporting the valve body 1. Four sliders 19 are slid at the bottom of the support seat 16. The four sliders 19 are respectively connected to the four sliders 21 through four connecting rods 20, so that when the sliders 21 move, the sliders 19 are driven to move. Through the cooperation of the above parts, the distance between the base 18 and the support seat 16 can be adjusted. The distance between each two sliders 21 is connected by the connecting block 22. The two connecting blocks 22 are connected to the bidirectional threaded rod 23 with internal threads. When the bidirectional threaded rod 23 rotates, the two connecting blocks 22 move in opposite directions. Bracket 1 24 is fixed on the base 18 to support the rotation of the bidirectional threaded rod 23. A worm wheel 25 is fixed on one end of the bidirectional threaded rod 23 to drive the bidirectional threaded rod 23 to rotate when the worm 26 rotates. Bracket 27 is fixed on the base 18 to support the rotation of the worm 26. A handle 28 is fixed on the worm 26 to enable the operator to better rotate the worm 26.

[0029] Working principle: When the liquid inside the valve body 1 moves to the left, the liquid will push the baffle 4, and the baffle 4 will be squeezed to the block 8 by the liquid. The block 8 moves upward, driving the sliding rod 7 to move upward, and squeezes the spring 9 through the limit block 6 to prevent the baffle 4 from being pushed too high by the liquid. When the liquid flows back, the spring 9 will release the tension and push the baffle 4 through the block 8, so that the baffle 4 is closed, so that the liquid cannot flow back, ensuring that the process remains stable.

[0030] When the valve body 1 needs to be supported, the handle 28 is turned to drive the worm 26 to rotate. When the worm 26 rotates, it drives the worm wheel 25 to rotate. The worm 26 will drive the two-way threaded rod 23 to rotate. The two-way threaded rod 23 drives the two connecting blocks 22 to move in opposite directions, thereby changing the height of the support seat 16 through the connecting rod 20. The position of the support seat 16 and the base 18 bracket can be adjusted according to the position of the valve body 1, so that the valve body 1 in different positions can be supported to the ground by the base 18, thereby reducing the pressure on the pipeline.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flange butterfly valve with a high-performance sealing structure, comprising a valve body (1), Features: The top of the inner side of the valve body (1) is fixedly connected to a support frame (2), the left side of the support frame (2) is fixedly connected to a hinge (3), the other end of the hinge (3) is fixedly connected to a baffle (4), the top of the inner side of the valve body (1) is fixedly connected to a fixed rod (5), the fixed rod (5) is slidably connected to a limit block (6) inside, the bottom of the limit block (6) is fixedly connected to a sliding rod (7), the bottom of the sliding rod (7) is fixedly connected to a baffle (8), the top of the inner side of the fixed rod (5) is fixedly connected to a spring (9), both ends of the valve body (1) are fixedly connected to flanges (11), the inside of the valve body (1) is rotatably connected to a butterfly plate (13), the top of the butterfly plate (13) is fixedly connected to a driving rod (14), the top of the driving rod (14) is fixedly connected to a rotating box (15), and a support assembly is provided at the bottom of the valve body (1).

2. A flange butterfly valve with a high performance sealing structure according to claim 1, Features: The support assembly comprises a support seat (16), wherein the support seat (16) is fixedly connected to the bottom of the valve body (1), a plurality of telescopic rods (17) are fixedly connected to the bottom of the support seat (16), a plurality of the telescopic rods (17) are fixedly connected to the bottom of a base (18), a plurality of sliders (19) are slidably connected to the bottom of the support seat (16), a plurality of sliders (19) are rotatably connected to the bottom of a connecting rod (20), two connecting blocks (22) are slidably connected to the top of the base (18), both ends of the two connecting blocks (22) are fixedly connected to sliders (21), and a plurality of the connecting blocks (22) are rotatably connected to the bottoms of a plurality of the connecting rods (20).

3. A flange butterfly valve with a high performance sealing structure according to claim 2, Features: The top of the base (18) is fixedly connected to two brackets (27), the two brackets (27) are internally rotatably connected to a worm (26), the outer periphery of the worm (26) is meshingly connected to a worm wheel (25), the inner periphery of the worm wheel (25) is fixedly connected to a bidirectional threaded rod (23), and the outer periphery of the bidirectional threaded rod (23) is threadedly connected to the inside of the two connecting blocks (22).

4. A flange butterfly valve with a high performance sealing structure according to claim 1, Features: A sealing belt (10) is fixedly connected to the outer periphery of the baffle (4), and a sealing ring (12) is fixedly connected to the inside of the two flanges (11).

5. A flange butterfly valve with a high performance sealing structure according to claim 1, Features: The bottom of the spring (9) is fixedly connected to the top of the limit block (6), and the sliding rod (7) is slidably connected to the bottom of the fixed rod (5).

6. A flange butterfly valve with a high performance sealing structure according to claim 2, Features: The plurality of sliders 2 (21) are all slidably connected to the top of the base (18).

7. A flange butterfly valve with a high performance sealing structure according to claim 3, Features: Both ends of the bidirectional threaded rod (23) are rotatably connected to a bracket one (24), and the bottoms of the two brackets one (24) are fixedly connected to the top of the base (18).

8. A flange butterfly valve with a high performance sealing structure according to claim 3, Features: The rear end of the worm (26) is fixedly connected with a handle (28).

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