Butterfly valve with sealing equipment

Abstract

The utility model provides a butterfly valve with sealing equipment, and belongs to the technical field of butterfly valves. The butterfly valve with the sealing equipment comprises a valve body and a butterfly plate, the butterfly plate is fixedly connected with a valve rod, the valve rod is rotationally connected with the valve body, a sealing mechanism is arranged between the valve body and the butterfly plate and comprises a sealing plate, a sealing ring and a packing layer, and the sealing plate is installed on one side of the butterfly plate; the sealing ring is fixedly connected with the outer wall of the sealing plate, and the sealing ring is slidably connected with the inner wall of the valve body. The packing layer is fixedly connected to the side, away from the butterfly plate, of the sealing plate, by arranging the sealing mechanism, after the valve body is closed, the sealing plate, the sealing ring and the packing layer cover the interior of the valve body, it can be ensured that sealing is reliable in the closed state of the valve body, medium leakage is prevented, and compared with sealing only through the sealing ring, the sealing performance is better.

Description

Technical Field

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

[0002] The butterfly valve is a common fluid control valve. Its name comes from the valve's structural form, which is similar to the shape of a butterfly's wings. The butterfly valve controls the medium by rotating the butterfly disc, which can achieve rapid opening and closing, as well as precise flow sealing. The following are the general characteristics and components of the butterfly valve: Simple structure: The butterfly valve has a relatively simple structure and consists of fewer parts, making installation, maintenance, and operation relatively simple. Small size and light weight: Due to its simple structure, the butterfly valve is usually smaller and lighter than other types of valves, making it suitable for occasions with limited space or requiring lightness. Flexible operation: The butterfly valve's butterfly disc can achieve rapid opening and closing, as well as precise flow sealing. It is flexible to operate, responds quickly, and has low flow resistance: The butterfly valve's fluid channel is relatively large, with low fluid resistance, which can reduce pressure loss in the pipeline system. Wide range of uses: The butterfly valve is suitable for various media, including liquids, gases, steam, etc., and is widely used in industry, construction, municipal administration and other fields. The butterfly valve opening and closing member is a disc-shaped butterfly disc that rotates around its own axis in the valve body to achieve the purpose of opening, closing or sealing.

[0003] The existing butterfly valve packing sealing device usually only uses a sealing ring for sealing, and the sealing performance is poor, so we propose a butterfly valve with a sealing device to solve the above problem. Utility Model Content

[0004] In order to make up for the above deficiencies, the present invention provides a butterfly valve with a sealing device that overcomes the above technical problems or at least partially solves the above problems.

[0005] The utility model provides a butterfly valve with a sealing device, comprising

[0006] The valve body and the butterfly plate are fixedly connected to the valve stem, the valve stem is rotatably connected to the valve body, and a sealing mechanism is provided between the valve body and the butterfly plate. The sealing mechanism includes

[0007] A sealing plate, the sealing plate being installed on one side of the butterfly plate;

[0008] A sealing ring, the sealing ring is fixedly connected to the outer wall of the sealing plate and is slidably connected to the inner wall of the valve body;

[0009] The packing layer is fixedly connected to a side of the sealing plate away from the butterfly plate.

[0010] In a preferred solution, a limit plate is fixedly connected to the inner wall of the valve body, and the limit plate is in contact with the packing layer.

[0011] In a preferred solution, the other end of the valve stem is fixedly connected to a handwheel, and the handwheel is provided with an anti-slip protrusion.

[0012] In a preferred solution, a disassembly mechanism is provided between the sealing plate and the butterfly plate, and the disassembly mechanism includes a first wedge block, which is fixedly connected to a side of the sealing plate close to the butterfly plate, and a limiting groove is provided on the first wedge block.

[0013] In a preferred solution, a mounting groove is provided on a side of the butterfly plate close to the sealing plate, and the first wedge-shaped block is plugged into an inner wall of the mounting groove.

[0014] In a preferred embodiment, a slide groove is provided inside the butterfly plate, the slide groove is connected to the mounting groove, the inner wall of the slide groove is slidably connected to a second wedge block, the second wedge block is plugged into the inner wall of the limiting groove, and the inclined surface of the second wedge block is slidably connected to the inclined surface of the first wedge block.

[0015] In a preferred solution, a spring is fixedly connected between the inner wall of the slide groove and the second wedge block, the second wedge block is fixedly connected to a handle, a sliding groove is provided on the side of the butterfly plate away from the sealing plate, the handle is slidably connected to the inner wall of the sliding groove, and the sliding groove is connected to the slide groove.

[0016] In a preferred solution, a side of the butterfly plate away from the sealing plate is fixedly connected to a limit rod, and a bolt is threadedly connected between the limit rod and the handle.

[0017] In a preferred embodiment, the handle is fixedly connected to a cover plate, the cover plate is slidably connected to the inner wall of the sliding groove, a receiving groove is opened inside the butterfly plate, the receiving groove is communicated with the sliding groove, and the cover plate is slidably connected to the inner wall of the receiving groove.

[0018] The utility model provides a butterfly valve with a sealing device, the beneficial effects of which include:

[0019] 1. By setting up a sealing mechanism, after the valve body is closed, the sealing plate, sealing ring and packing layer cover the inside of the valve body, which can ensure that the valve body is reliably sealed in the closed state to prevent medium leakage. Compared with using only a sealing ring for sealing, the sealing performance is better.

[0020] 2. By pulling the handle, the handle drives the second wedge block to slide into the slide groove until the second wedge block is pulled out of the limit groove. The sealing mechanism can be pulled outward, and the first wedge block can be pulled out of the installation groove. The sealing mechanism is removed, which is convenient for replacement of the sealing mechanism, ensuring the sealing performance of the sealing mechanism and improving the service life of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can also derive other relevant drawings based on these drawings without inventive effort.

[0022] Figure 1 This is a three-dimensional diagram of the overall structure provided by the embodiment of the utility model;

[0023] Figure 2 A schematic diagram of the cross-sectional structure of a valve body provided in an embodiment of the present utility model;

[0024] Figure 3 A schematic diagram of the structure of a first wedge block provided in an embodiment of the present utility model;

[0025] Figure 4 A schematic diagram of the butterfly plate structure provided in an embodiment of the present utility model;

[0026] Figure 5 Schematic diagram of the butterfly plate cross-section structure provided by the embodiment of the utility model Figure 1 ;

[0027] Figure 6 Schematic diagram of the butterfly plate cross-section structure provided by the embodiment of the utility model Figure 2 ;

[0028] In the figure: 1. Valve body; 2. Sealing mechanism; 201. Sealing plate; 202. Sealing ring; 203. Packing layer; 3. Disassembly mechanism; 301. First wedge block; 302. Limiting groove; 303. Mounting groove; 304. Slide groove; 305. Second wedge block; 306. Spring; 307. Handle; 308. Slide groove; 4. Valve stem; 5. Butterfly plate; 6. Handwheel; 7. Limiting plate; 8. Limiting rod; 9. Bolt; 10. Cover plate; 11. Storage groove. DETAILED DESCRIPTION

[0029] 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 drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Reference Figures 1-6, the utility model provides a technical solution: a butterfly valve with a sealing device, including a valve body 1 and a butterfly plate 5, the butterfly plate 5 is fixedly connected to the valve stem 4, the valve stem 4 is rotatably connected to the valve body 1, and a sealing mechanism 2 is arranged between the valve body 1 and the butterfly plate 5, the sealing mechanism 2 includes a sealing plate 201, a sealing ring 202 and a packing layer 203, the sealing plate 201 is installed on one side of the butterfly plate 5; the sealing ring 202 is fixedly connected to the outer wall of the sealing plate 201, and the sealing ring 202 is slidably connected to the inner wall of the valve body 1; the packing layer 203 is fixedly connected to the side of the sealing plate 201 away from the butterfly plate 5. By providing the sealing mechanism 2, after the valve body 1 is closed, the sealing plate 201, the sealing ring 202 and the packing layer 203 cover the interior of the valve body 1, which can ensure that the valve body 1 is reliably sealed in the closed state to prevent medium leakage. Compared with using only the sealing ring 202 for sealing, the sealing performance is better;

[0031] The inner wall of the valve body 1 is fixedly connected to a limit plate 7, which contacts the packing layer 203. The limit plate 7 is used to limit the butterfly plate 5 and the sealing mechanism 2. When the user cannot rotate the valve stem 4, the operation of closing the valve body 1 is completed.

[0032] The other end of the valve stem 4 is fixedly connected to a handwheel 6, which is provided with an anti-slip protrusion. The anti-slip protrusion on the handwheel 6 is used to increase the friction between the user's palm and the handwheel 6;

[0033] A disassembly mechanism 3 is provided between the sealing plate 201 and the butterfly plate 5. The disassembly mechanism 3 includes a first wedge block 301, which is fixedly connected to the side of the sealing plate 201 close to the butterfly plate 5. A limiting groove 302 is provided on the first wedge block 301. A mounting groove 303 is provided on the side of the butterfly plate 5 close to the sealing plate 201. The first wedge block 301 is plugged into the inner wall of the mounting groove 303. A sliding groove 304 is provided inside the butterfly plate 5. The sliding groove 304 is connected to the mounting groove 303. 03 is connected, the inner wall of the slide groove 304 is slidably connected with a second wedge block 305, the second wedge block 305 is plugged into the inner wall of the limiting groove 302, the inclined surface of the second wedge block 305 is slidably connected to the inclined surface of the first wedge block 301, a spring 306 is fixedly connected between the inner wall of the slide groove 304 and the second wedge block 305, the second wedge block 305 is fixedly connected with a handle 307, a sliding groove 308 is opened on the side of the butterfly plate 5 away from the sealing plate 201, and the handle 307 is fixedly connected to the second wedge block 307. When the cam 308 is in the closed position, the spring 306 is pressed against the locking cam 307, and the locking cam 308 is pressed against the locking cam 307, so that the cam 308 is in the closed position.

[0034] A limit rod 8 is fixedly connected to the side of the butterfly plate 5 away from the sealing plate 201. A bolt 9 is threadedly connected between the limit rod 8 and the handle 307. The limit rod 8 and the bolt 9 are used to limit the handle 307 to prevent the handle 307 from moving under the impact of water flow, thereby preventing the sealing mechanism 2 from falling off the butterfly plate 5 during use. When disassembling, the bolt 9 needs to be unscrewed first;

[0035] The handle 307 is fixedly connected to the cover plate 10, which is slidably connected to the inner wall of the sliding groove 308. A storage groove 11 is opened inside the butterfly plate 5, and the storage groove 11 is communicated with the sliding groove 308. The cover plate 10 is slidably connected to the inner wall of the storage groove 11. The cover plate 10 is used to prevent water from entering the butterfly plate 5, and the storage groove 11 is used to store the cover plate 10.

[0036] Specifically, the working process or working principle of the butterfly valve with a sealing device is as follows: by setting a sealing mechanism 2, after the valve body 1 is closed, the sealing plate 201, the sealing ring 202 and the packing layer 203 cover the interior of the valve body 1, which can ensure that the valve body 1 is reliably sealed in the closed state to prevent medium leakage. Compared with using only the sealing ring 202 for sealing, the sealing performance is better.

[0037] When the cam 305 is in the closed position, the spring 306 is pressed against the top of the cam 306, and the spring 306 is pressed against the bottom of the cam 306, so that the cam 305 is pressed against the top of the cam 306, and the spring 306 is pressed against the bottom of the cam 306, so that the cam 305 is pressed against the bottom of the cam 306, and the cam 306 is pressed against the bottom of the cam 306.

Claims

1. A butterfly valve with a sealing device, characterized in that: The invention comprises a valve body (1) and a butterfly plate (5), wherein the butterfly plate (5) is fixedly connected to a valve stem (4), and the valve stem (4) is rotatably connected to the valve body (1). A sealing mechanism (2) is provided between the valve body (1) and the butterfly plate (5), and the sealing mechanism (2) comprises A sealing plate (201), the sealing plate (201) being mounted on one side of the butterfly plate (5); A sealing ring (202), wherein the sealing ring (202) is fixedly connected to the outer wall of the sealing plate (201), and the sealing ring (202) is slidably connected to the inner wall of the valve body (1); A packing layer (203), wherein the packing layer (203) is fixedly connected to a side of the sealing plate (201) away from the butterfly plate (5).

2. A butterfly valve with a sealing device according to claim 1, characterized in that: The inner wall of the valve body (1) is fixedly connected to a limit plate (7), and the limit plate (7) is in contact with the packing layer (203).

3. A butterfly valve with a sealing device according to claim 2, characterized in that: The other end of the valve stem (4) is fixedly connected to a hand wheel (6), and an anti-slip protrusion is provided on the hand wheel (6).

4. A butterfly valve with a sealing device according to claim 3, characterized in that: A disassembly mechanism (3) is provided between the sealing plate (201) and the butterfly plate (5), and the disassembly mechanism (3) comprises a first wedge block (301), the first wedge block (301) being fixedly connected to a side of the sealing plate (201) close to the butterfly plate (5), and a limiting groove (302) being provided on the first wedge block (301).

5. A butterfly valve with a sealing device according to claim 4, characterized in that: A mounting groove (303) is provided on one side of the butterfly plate (5) close to the sealing plate (201), and the first wedge-shaped block (301) is plugged into the inner wall of the mounting groove (303).

6. A butterfly valve with a sealing device according to claim 5, characterized in that: A sliding groove (304) is provided inside the butterfly plate (5), and the sliding groove (304) is communicated with the mounting groove (303). The inner wall of the sliding groove (304) is slidably connected with a second wedge block (305). The second wedge block (305) is plugged into the inner wall of the limiting groove (302), and the inclined surface of the second wedge block (305) is slidably connected to the inclined surface of the first wedge block (301).

7. A butterfly valve with a sealing device according to claim 6, characterized in that: A spring (306) is fixedly connected between the inner wall of the slide groove (304) and the second wedge block (305), and a handle (307) is fixedly connected to the second wedge block (305). A sliding groove (308) is provided on the side of the butterfly plate (5) away from the sealing plate (201), and the handle (307) is slidably connected to the inner wall of the sliding groove (308), and the sliding groove (308) is connected to the slide groove (304).

8. A butterfly valve with a sealing device according to claim 7, characterized in that: A side of the butterfly plate (5) away from the sealing plate (201) is fixedly connected to a limiting rod (8), and a bolt (9) is threadedly connected between the limiting rod (8) and the handle (307).

9. A butterfly valve with a sealing device according to claim 8, characterized in that: The handle (307) is fixedly connected to a cover plate (10), and the cover plate (10) is slidably connected to the inner wall of the sliding groove (308). A receiving groove (11) is provided inside the butterfly plate (5), and the receiving groove (11) is communicated with the sliding groove (308). The cover plate (10) is slidably connected to the inner wall of the receiving groove (11).

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