Sediment-proof butterfly valve

Abstract

The utility model relates to the technical field of butterfly valve protection, and discloses an anti-sediment butterfly valve which comprises a valve body, a valve rod is rotatably connected to the interior of the valve body, a butterfly plate is fixedly connected to the outer wall of the valve rod, a hollow block is fixedly connected to the outer wall of the butterfly plate, a cross is slidably connected to the interior of the hollow block, and the cross is fixedly connected to the outer wall of the valve rod. And a tension spring is fixedly connected to the outer wall of the cross, a sliding rod is slidably connected to the interior of the cross, a connecting plate is rotatably connected to the outer wall of the cross, a limiting frame is rotatably connected to the interior of the connecting plate, and the outer wall of the limiting frame penetrates through the interior of the hollow block and is slidably connected with a scale scraping ring. According to the self-cleaning butterfly valve, the hollow block, the cross, the tension spring, the sliding rod, the connecting plate, the limiting frame and the limiting assembly are matched with one another, so that the scale scraping ring can be conveniently replaced after being abraded or damaged, the maintenance cost and the maintenance difficulty are reduced, meanwhile, the scale scraping ring rotates along with the butterfly plate, the valve body is self-cleaned, and sediment is prevented from being accumulated.

Description

A type of butterfly valve for preventing mud and sand Technical Field

[0001] This utility model relates to the field of butterfly valve protection technology, and in particular to a mud and sand resistant butterfly valve. Background Technology

[0002] A butterfly valve is a valve device that achieves opening, closing, and flow control through the rotation of a disc-shaped valve plate around a valve shaft. Its core structure consists of a valve body, a valve stem, and a butterfly plate. The valve plate can quickly complete full opening or full closing within a rotation range of 0 to 90 degrees. It features a compact structure, light weight, and low flow resistance, and is widely used for pipeline media control in water treatment, petrochemical, and HVAC systems. In water conservancy projects, sewage treatment, and mining, the fluids in pipelines often contain a large amount of solid particles such as silt and sand. When dealing with such fluids, ordinary butterfly valves are prone to reduced sealing performance and significantly shortened service life due to erosion and wear between the butterfly plate and the valve body caused by silt and sand. Therefore, a silt-resistant butterfly valve is required.

[0003] The anti-sand butterfly valve is a valve specifically designed for complex fluid conditions containing a large amount of solid particles such as mud and sand. In the past, semi-circular descaling plates were usually installed on both sides of the butterfly plate using bolts. During the opening and closing of the butterfly valve, the inner wall of the valve body was brushed to clean mud and sand. This method is cumbersome and time-consuming when installing and removing the semi-circular descaling plates, which increases the difficulty and cost of maintenance. Summary of the Invention

[0004] To overcome the above shortcomings, this utility model provides a mud and sand-proof butterfly valve, which aims to improve the problem that the process of installing and disassembling the semi-circular descaling plate using bolts on both sides of the butterfly plate is cumbersome and time-consuming.

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

[0006] A mud-proof butterfly valve includes a valve body, a valve stem rotatably connected inside the valve body, a butterfly plate fixedly connected to the outer wall of the valve stem, the outer wall of the butterfly plate being disposed on the inner wall of the valve body, a hollow block fixedly connected to the outer wall of the butterfly plate, a cross slidably connected inside the hollow block, a tension spring fixedly connected to the outer wall of the cross, the outer wall of the tension spring fixedly connected to the inner wall of the hollow block, a sliding rod slidably connected inside the cross, both ends of the sliding rod being fixedly connected to the inner wall of the hollow block, a connecting plate rotatably connected to the outer wall of the cross, a limit frame rotatably connected inside the connecting plate, a scraper ring slidably connected to the outer wall of the limit frame penetrating the interior of the hollow block, and a limit assembly provided inside the valve body for limiting the valve stem.

[0007] Preferably, the limiting component includes a worm gear, the outer wall of which is rotatably connected to the inside of the valve body, and the tooth end of the worm gear is meshed with a worm wheel, the inside of which is fixedly connected to the outer wall of the valve stem.

[0008] Preferably, the scraper ring is slidably connected to the outer wall of the hollow block, and the outer wall of the scraper ring is disposed on the outer wall of the butterfly plate.

[0009] Preferably, a fixing frame is fixedly connected to the outer wall of the valve body, and a Z-shaped bracket is rotatably connected inside the fixing frame.

[0010] Preferably, a ratchet is fixedly connected to the outer wall of the Z-shaped frame, and a pawl is engaged with the tooth end of the ratchet. The pawl is rotatably connected to the outer wall of the fixed frame.

[0011] Preferably, a spring is fixedly connected to the outer wall of the pawl, and the outer wall of the spring is fixedly connected to the outer wall of the fixed frame.

[0012] Preferably, a gear is fixedly connected to the front outer wall of the Z-shaped frame, the tooth end of the gear is meshed with a toothed plate, and a semi-circular frame is fixedly connected to the outer wall of the toothed plate.

[0013] Preferably, the outer wall of the semicircular frame is slidably connected to the inner wall of the valve body, a sealing strip is fixedly connected to the inside of the semicircular frame, a filter frame is slidably connected to the inside of the semicircular frame, the outer wall of the filter frame is slidably connected to the inside of the valve body, and the outer wall of the sealing strip is disposed on the inner wall of the filter frame.

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

[0015] 1. In this utility model, the cooperation between the hollow block, cross, tension spring, slide rod, connecting plate, limit frame and limit assembly makes it easy to replace the scraper ring after it is worn or damaged, reducing maintenance costs and difficulty. At the same time, the scraper ring rotates with the butterfly plate to self-clean the valve body and prevent the accumulation of mud and sand.

[0016] 2. In this utility model, the installation of the filter frame is limited or released by the cooperation between the Z-shaped frame, ratchet, pawl, spring, gear, toothed plate, semi-circular frame and sealing strip, so as to facilitate the regular inspection, cleaning or replacement of the filter frame, and at the same time prevent the valve body from mud and sand, thus extending the service life of the butterfly valve. Attached Figure Description

[0017] Figure 1 is a perspective view of a mud-proof butterfly valve proposed in this utility model;

[0018] Figure 2 is a cross-sectional schematic diagram of the internal structure of the valve body of a mud-proof butterfly valve proposed in this utility model;

[0019] Figure 3 is a cross-sectional schematic diagram of the internal structure of the hollow block of a mud-proof butterfly valve proposed in this utility model.

[0020] Figure 4 is a partial structural diagram of the Z-shaped frame of a mud-proof butterfly valve proposed in this utility model;

[0021] Figure 5 is a partial structural diagram of the sealing strip of a mud-proof butterfly valve proposed in this utility model.

[0022] Legend:

[0023] 1. Valve body; 2. Worm gear; 3. Worm wheel; 4. Valve stem; 5. Butterfly plate; 6. Scraper ring; 7. Hollow block; 8. Cross; 9. Tension spring; 10. Slide rod; 11. Connecting plate; 12. Limiting bracket; 13. Fixing frame; 14. Z-shaped bracket; 15. Ratchet; 16. Pad; 17. Spring; 18. Gear; 19. Toothed plate; 20. Semi-circular bracket; 21. Sealing strip; 22. Filter frame. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Referring to Figures 1-3, one embodiment of this utility model provides: a mud-proof butterfly valve, including a valve body 1, a valve stem 4 rotatably connected inside the valve body 1, a butterfly plate 5 fixedly connected to the outer wall of the valve stem 4, the outer wall of the butterfly plate 5 being disposed on the inner wall of the valve body 1, a hollow block 7 fixedly connected to the outer wall of the butterfly plate 5, a cross 8 slidably connected inside the hollow block 7, a tension spring 9 fixedly connected to the outer wall of the cross 8, the outer wall of the tension spring 9 fixedly connected to the inner wall of the hollow block 7, and a sliding rod 10 slidably connected inside the cross 8. Both ends of 0 are fixedly connected to the inner wall of the hollow block 7. The outer wall of the cross 8 is rotatably connected to the connecting plate 11. The inner wall of the connecting plate 11 is rotatably connected to the limit frame 12. The outer wall of the limit frame 12 penetrates the interior of the hollow block 7 and is slidably connected to the scraper ring 6. The valve body 1 is provided with a limit component, which is used to limit the valve stem 4. The limit component includes a worm 2. The outer wall of the worm 2 is rotatably connected to the interior of the valve body 1. The tooth end of the worm 2 is meshed with a worm wheel 3. The interior of the worm wheel 3 is fixedly connected to the outer wall of the valve stem 4.

[0026] Specifically, the worm gear 2 is equipped with a handle for easy operation. The worm wheel 3 drives the valve stem 4 to rotate via the worm gear 2, thereby causing the butterfly plate 5 to rotate on the inner wall of the valve body 1, opening or closing the butterfly valve. The interior of the hollow block 7 restricts the sliding range of the cross 8. The slide rod 10 supports and limits the movement of the cross 8. The cross 8 is connected to the limiting frame 12 via the connecting plate 11. The interior of the hollow block 7 limits the movement of the limiting frame 12. The tension spring 9 is used to pull the cross 8 to keep it stationary, thereby supporting the limiting frame 12 as it slides into the scraper ring 6.

[0027] Referring to Figure 2, the inside of the scraper ring 6 is slidably connected to the outer wall of the hollow block 7, and the outer wall of the scraper ring 6 is set on the outer wall of the butterfly plate 5.

[0028] Specifically, the outer wall of the hollow block 7 achieves the positioning effect for the installation of the scraper ring 6. By using the scraper ring 6 to fit with the butterfly plate 5, the scraper ring 6 rotates with the butterfly plate 5. The outer wall of the scraper ring 6 is provided with bristles, which clean the inner wall of the valve body 1 when the scraper ring 6 rotates.

[0029] Referring to Figure 4, a fixed frame 13 is fixedly connected to the outer wall of the valve body 1, and a Z-shaped bracket 14 is rotatably connected inside the fixed frame 13; a ratchet 15 is fixedly connected to the outer wall of the Z-shaped bracket 14, and a pawl 16 is engaged with the tooth end of the ratchet 15; the pawl 16 is rotatably connected to the outer wall of the fixed frame 13; a spring 17 is fixedly connected to the outer wall of the pawl 16, and the outer wall of the spring 17 is fixedly connected to the outer wall of the fixed frame 13.

[0030] Specifically, the fixed frame 13 supports the rotation of the Z-shaped frame 14. When the Z-shaped frame 14 and the ratchet 15 rotate to the right, the pawl 16 does not limit the ratchet 15. When the ratchet 15 rotates to the left, the spring 17 and the pawl 16 limit the rotation of the ratchet 15. Only by pressing the end of the pawl 16 connected to the spring 17 and moving the pawl 16 downward away from the outer wall of the ratchet 15 can the ratchet 15 rotate to the left.

[0031] Referring to Figures 4 and 5, a gear 18 is fixedly connected to the front outer wall of the Z-shaped frame 14, and a toothed plate 19 is meshed with the tooth end of the gear 18. A semi-circular frame 20 is fixedly connected to the outer wall of the toothed plate 19. The outer wall of the semi-circular frame 20 is slidably connected to the inner wall of the valve body 1. A sealing strip 21 is fixedly connected to the inside of the semi-circular frame 20. A filter frame 22 is slidably connected to the inside of the semi-circular frame 20. The outer wall of the filter frame 22 is slidably connected to the inside of the valve body 1. The outer wall of the sealing strip 21 is set on the inner wall of the filter frame 22.

[0032] Specifically, the Z-shaped frame 14 drives the gear 18 to rotate, thereby causing the toothed plate 19 and the semi-circular frame 20 to move up and down, tightly fitting or releasing the semi-circular frame 20 from the valve body 1. At the same time, a sealing gasket is provided on the outer wall of the semi-circular frame 20 to improve the waterproofness of the connection between the semi-circular frame 20 and the valve body 1. The filter frame 22 is used to filter the mud and sand in the pipeline water flow, thereby preventing the butterfly valve from being contaminated by mud and sand. The inner wall of the filter frame 22 has a groove. Under the action of the sealing strip 21, the semi-circular frame 20 achieves the effect of limiting the filter frame 22, and also improves the waterproofness of the connection between the semi-circular frame 20 and the filter frame 22.

[0033] Working principle: When using this butterfly valve, pulling the cross bar 8 slides on the outer wall of the slide rod 10, stretching the tension spring 9, and causing the connecting plate 11 to move to the right. This causes the limiting bracket 12 to slide upward into the hollow block 7, bringing the scraper ring 6 into contact with the butterfly plate 5 and the outer wall of the hollow block 7. Releasing the cross bar 8, under the tension of the tension spring 9, causes the cross bar 8 to move to the left, causing the limiting bracket 12 to slide downward into the scraper ring 6 for limiting, thus installing the scraper ring 6. By rotating the worm gear 2, the worm wheel 3 and valve stem 4 rotate, causing the butterfly plate 5 to rotate on the inner wall of the valve body 1, opening the butterfly valve. The butterfly plate 5 then drives the scraper ring 6 to rotate together, opening the valve. The connection between the butterfly plate 5 and the valve body 1 is self-cleaning. The filter frame 22 is used to prevent mud and sand from accumulating on the butterfly valve. When too much mud and sand accumulates on the surface of the filter frame 22, the pawl 16 is pressed to squeeze the spring 17, so that the pawl 16 no longer limits the ratchet 15. The Z-shaped frame 14 is rotated, which drives the gear 18 to rotate, so that the toothed plate 19 slides out of the range of the gear 18. This allows the semi-circular frame 20 and the sealing strip 21 to slide out of the inner wall of the valve body 1, no longer limiting the filter frame 22. This makes it easy to disassemble and clean the filter frame 22. During use, this butterfly valve not only allows for quick installation and removal of the scraper ring 6, but also facilitates the maintenance or cleaning of the filter frame 22.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mud-proof butterfly valve, comprising a valve body (1), characterized in that: A valve stem (4) is rotatably connected inside the valve body (1). A butterfly plate (5) is fixedly connected to the outer wall of the valve stem (4). The outer wall of the butterfly plate (5) is set on the inner wall of the valve body (1). A hollow block (7) is fixedly connected to the outer wall of the butterfly plate (5). A cross (8) is slidably connected inside the hollow block (7). A tension spring (9) is fixedly connected to the outer wall of the cross (8). The outer wall of the tension spring (9) is fixedly connected to the inner wall of the hollow block (7). The hollow block (7) has a sliding rod (10) inside, and both ends of the sliding rod (10) are fixedly connected to the inner wall of the hollow block (7). The outer wall of the cross (8) is rotatably connected to a connecting plate (11). The inner wall of the connecting plate (11) is rotatably connected to a limit frame (12). The outer wall of the limit frame (12) penetrates the interior of the hollow block (7) and is slidably connected to a scraper ring (6). The valve body (1) is provided with a limit component inside, which is used to limit the valve stem (4).

2. The anti-silt butterfly valve according to claim 1, wherein: The limiting assembly includes a worm (2), the outer wall of which is rotatably connected to the inside of the valve body (1), and the tooth end of the worm (2) is meshed with a worm wheel (3), the inside of which is fixedly connected to the outer wall of the valve stem (4).

3. The anti-silt butterfly valve according to claim 1, wherein: The scraper ring (6) is internally slidably connected to the outer wall of the hollow block (7), and the outer wall of the scraper ring (6) is disposed on the outer wall of the butterfly plate (5).

4. The anti-silt butterfly valve of claim 1, wherein: The outer wall of the valve body (1) is fixedly connected to a fixing frame (13), and the inside of the fixing frame (13) is rotatably connected to a Z-shaped frame (14).

5. A mud-proof butterfly valve according to claim 4, characterized in that: A ratchet (15) is fixedly connected to the outer wall of the Z-shaped frame (14), and a pawl (16) is engaged with the tooth end of the ratchet (15). The pawl (16) is rotatably connected to the outer wall of the fixed frame (13).

6. The anti-silt butterfly valve according to claim 5, wherein: A spring (17) is fixedly connected to the outer wall of the pawl (16), and the outer wall of the spring (17) is fixedly connected to the outer wall of the fixed frame (13).

7. The anti-silt butterfly valve according to claim 4, wherein: A gear (18) is fixedly connected to the front outer wall of the Z-shaped frame (14), and a toothed plate (19) is meshed with the tooth end of the gear (18). A semi-circular frame (20) is fixedly connected to the outer wall of the toothed plate (19).

8. A mud-proof butterfly valve according to claim 7, characterized in that: The outer wall of the semicircular frame (20) is slidably connected to the inner wall of the valve body (1). A sealing strip (21) is fixedly connected inside the semicircular frame (20). A filter frame (22) is slidably connected inside the semicircular frame (20). The outer wall of the filter frame (22) is slidably connected to the inside of the valve body (1). The outer wall of the sealing strip (21) is set on the inner wall of the filter frame (22).

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