Double-eccentric sealing butterfly valve

Abstract

The utility model discloses a double eccentric type sealing butterfly valve which comprises a valve body and first connecting flanges, the two first connecting flanges are arranged at the front end and the rear end of the valve body respectively, a valve rod is arranged in the valve body, and connecting blocks are arranged on the front surface and the rear surface of the valve rod respectively. The valve rod, the connecting block, the valve plate, the sealing rings and the pressing plate are connected and fixed through the inner hexagon screws, the stability of the sealing rings is ensured, the sealing rings are convenient to replace after being damaged, the sealing rings are arranged on the two sides of the valve plate, when the valve plate is closed, the two sealing rings are attached to the inner wall of the valve body at the same time, bidirectional sealing is conducted, and the sealing effect is good. Meanwhile, after one sealing ring is damaged, the other sealing ring can play a sealing role, normal use of the butterfly valve is guaranteed, the multi-layer sealing effect is achieved, the phenomena of erosion, damage and leakage of a sealing pair after long-term use are effectively prevented, and the service life of the butterfly valve is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical direction of valves, and specifically relates to a double-eccentric sealing butterfly valve. Background Art

[0002] A butterfly valve is a valve with a disc that rotates around the valve shaft to open and close. It can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays a cutting and throttling role in the pipeline. The valve stem axis of the butterfly valve deviates from the center of the disc and the center of the body at the same time, and the butterfly valve with an oblique cone as the sealing pair is called a triple eccentric butterfly valve. Compared with traditional butterfly valves, triple eccentric butterfly valves are more resistant to high temperature, high pressure and corrosion. In addition, there is no direct friction between the valve disc and the valve body when opening and closing, and the service life is long.

[0003] The existing technology has the following problems:

[0004] 1. The double eccentric sealing butterfly valves currently available on the market generally only have one sealing pair in one direction, which has poor sealing effect. After long-term use, they are corroded and damaged, and are prone to leakage, which in turn affects their normal use.

[0005] 2. The double eccentric sealing butterfly valve currently available on the market has a single structure, and the pipeline and the water inlet are directly connected. When used for a long time, the butterfly valve is easily blocked due to excessive impurities in the water, which is inconvenient for subsequent maintenance and upkeep of the device. Utility Model Content

[0006] The purpose of the utility model is to provide a double eccentric sealing butterfly valve for existing devices to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a double eccentric sealing butterfly valve, comprising a valve body and a first connecting flange, the two first connecting flanges being respectively arranged at the front and rear ends of the valve body, a valve stem being arranged inside the valve body, connecting blocks being arranged on the front and rear surfaces of the valve stem, and the outer surface of the connecting block being connected to the valve plate.

[0008] A sealing ring is provided on the outer side of the valve plate, a pressure plate is provided on one side of the sealing ring, an inner surface of the pressure plate is threadedly connected with a hexagon socket screw, and a hand wheel is provided on one side of the valve stem.

[0009] The present invention further illustrates that a second connecting flange is provided on one side of the first connecting flange, and a filter plate is fixedly mounted on the inner surface of the second connecting flange.

[0010] The above technical solution is adopted, in which the medium in the water flow is filtered through the filter plate.

[0011] The utility model further describes that the inner wall of the second connecting flange is threadedly connected with a first bolt, the outer wall of the first connecting flange is provided with a first nut, one end of the first bolt passes through the first connecting flange and the second connecting flange, and is threadedly connected to the first nut.

[0012] By adopting the above technical solution, the cooperation of the first bolt and the first nut in this solution adds a pipe and a second connecting flange to facilitate disassembly and installation, facilitate subsequent maintenance and care of the device, and facilitate cleaning of the filter plate.

[0013] The utility model further describes that a pipe is provided on one side of the second connecting flange, a silt collecting trough is opened at the bottom of the pipe, a silt collecting box is fixedly connected to the bottom of the silt collecting trough, a first fixing ring is fixedly installed on one side of the silt collecting box, and there are multiple first fixing rings, and the multiple first fixing rings are arranged around the silt collecting box as the center point.

[0014] The above technical solution is adopted. In this solution, a sludge collecting box is installed at the bottom of the pipeline to collect and precipitate the impurities intercepted by the filter plate, which is convenient for unified cleaning later.

[0015] The utility model further describes that the bottom of the sludge collecting box is fittedly connected to a base plate, and a second fixing ring is fixedly installed on one side of the base plate. There are multiple second fixing rings, and the multiple second fixing rings are arranged around the sludge collecting box as the center point.

[0016] By adopting the above technical solution, the bottom plate is installed to facilitate cleaning of the sludge collecting box after disassembly.

[0017] The utility model further describes that the inner wall of the second fixing ring is threadedly connected with a second bolt, the bottom of the first fixing ring is provided with a second nut, and the second bolt passes through the first fixing ring and the second fixing ring to form a threaded connection with the second nut.

[0018] Using the above technical solution, the staff will remove the second bolt and the second nut at regular intervals to separate the bottom plate from the silt collecting box, clean the impurities inside the silt collecting box, and reset the second bolt, the second nut and the bottom plate after cleaning.

[0019] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0020] The utility model provides a double eccentric sealing butterfly valve, and the valve stem, connecting block, valve plate, sealing ring and pressure plate are connected and fixed by hexagon socket screws, which ensures the stability of the sealing ring and is easy to replace after the sealing ring is damaged. In addition, sealing rings are provided on both sides of the valve plate. When the valve plate is closed, the two sealing rings are simultaneously fitted with the inner wall of the valve body to perform bidirectional sealing, thereby improving the sealing effect. At the same time, after one of the sealing rings is damaged, the other sealing ring can still play a sealing role, ensuring its normal use, achieving the effect of multi-layer sealing, effectively preventing the sealing pair from being eroded, damaged and leaking after long-term use, extending the service life of the butterfly valve, and meeting the user's use requirements.

[0021] The utility model provides a double-eccentric sealing butterfly valve, and through the cooperation of the silt collecting groove, the silt collecting box, the first fixing ring, the bottom plate, the second fixing ring, the second bolt and the second nut, while ensuring the sealing, it is convenient for the staff to disassemble the bottom plate to clean the impurities deposited in the silt collecting box to avoid blockage. At regular intervals, the staff will remove the second bolt and the second nut to separate the bottom plate from the silt collecting box, clean the impurities inside the silt collecting box, and reset the second bolt, the second nut and the bottom plate after the cleaning is completed, meeting the user's usage needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is a side structural schematic diagram of the utility model;

[0025] Figure 3 This is a front view structural diagram of the present utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the utility model in partial cross-section and viewed from above;

[0027] Figure 5 It is a partial cross-sectional front view structural schematic diagram of the utility model.

[0028] In the figure: 1. Valve body; 2. First connecting flange; 3. Valve stem; 4. Valve plate; 5. Sealing ring; 6. Pressure plate; 7. Hexagon socket screw; 8. Handwheel; 9. Second connecting flange; 10. Filter plate; 11. First bolt; 12. First nut; 13. Sludge collecting trough; 14. Sludge collecting box; 15. Bottom plate; 16. First fixing ring; 17. Second fixing ring; 18. Second bolt; 19. Second nut. DETAILED DESCRIPTION

[0029] The following is a non-limiting detailed description of the technical solution of the present invention in conjunction with preferred embodiments and their accompanying drawings. Obviously, the described embodiments are only a portion of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0030] See also Figure 1-5 The utility model provides a technical solution: a double eccentric sealing butterfly valve, including a valve body 1 and a first connecting flange 2, the two first connecting flanges 2 are respectively arranged at the front and rear ends of the valve body 1, a valve stem 3 is arranged inside the valve body 1, and connecting blocks are provided on the front and rear surfaces of the valve stem 3, and the outer surface of the connecting block is connected to the valve plate 4.

[0031] A sealing ring 5 is provided on the outer side of the valve plate 4 , a pressure plate 6 is provided on one side of the sealing ring 5 , an inner surface of the pressure plate 6 is threadedly connected with a hexagon socket screw 7 , and a hand wheel 8 is provided on one side of the valve stem 3 .

[0032] In this embodiment, the valve stem 3, the connecting block, the valve plate 4, the sealing ring 5 and the pressure plate 6 are connected and fixed by the hexagon socket screw 7, so that the stability of the sealing ring 5 is ensured, and it is easy to replace after the sealing ring 5 is damaged. In addition, sealing rings 5 ​​are provided on both sides of the valve plate 4. When the valve plate 4 is closed, the two sealing rings 5 ​​are simultaneously fitted with the inner wall of the valve body 1 to perform bidirectional sealing, thereby improving the sealing effect. At the same time, after one of the sealing rings 5 ​​is damaged, the other sealing ring 5 can still play a sealing role to ensure its normal use, thereby achieving the effect of multi-layer sealing, effectively preventing the sealing pair from erosion, damage and leakage after long-term use, and extending the service life of the butterfly valve.

[0033] like Figure 1-5As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, a second connecting flange 9 is provided on one side of the first connecting flange 2, a filter plate 10 is fixedly installed on the inner surface of the second connecting flange 9, a first bolt 11 is threadedly connected to the inner wall of the second connecting flange 9, a first nut 12 is provided on the outer wall of the first connecting flange 2, one end of the first bolt 11 passes through the first connecting flange 2 and the second connecting flange 9, and is threadedly connected to the first nut 12, a pipeline is provided on one side of the second connecting flange 9, a silt collecting trough 13 is provided at the bottom of the pipeline, a silt collecting box 14 is fixedly connected to the bottom of the silt collecting trough 13, a first fixing ring 16 is fixedly installed on one side of the silt collecting box 14, a plurality of first fixing rings 16 are provided, and the plurality of first fixing rings 16 are arranged around the silt collecting box 14 as the center point.

[0034] In this embodiment, the medium in the water flow is filtered through the filter plate 10, and the cooperation of the first bolt 11 and the first nut 12 is used to add a pipeline and a second connecting flange 9 to facilitate disassembly and installation, facilitate subsequent maintenance and maintenance of the device, and facilitate cleaning of the filter plate 10. By installing a sludge collecting box 14 at the bottom of the pipeline, it is convenient to collect and precipitate impurities intercepted by the filter plate 10, which is convenient for unified cleaning later.

[0035] like Figure 1-5 As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the bottom of the sludge collecting box 14 is fittedly connected with a bottom plate 15, and a second fixing ring 17 is fixedly installed on one side of the bottom plate 15. A plurality of second fixing rings 17 are provided, and the plurality of second fixing rings 17 are arranged around the sludge collecting box 14 as the center point. The inner wall of the second fixing ring 17 is threadedly connected with a second bolt 18, and a second nut 19 is provided at the bottom of the first fixing ring 16. The second bolt 18 is threadedly connected to the second nut 19 by passing through the first fixing ring 16 and the second fixing ring 17.

[0036] In this embodiment, the bottom plate 15 is installed to facilitate the cleaning of the silt collecting box 14 after disassembly. Every once in a while, the staff removes the second bolt 18 and the second nut 19 to separate the bottom plate 15 from the silt collecting box 14, and cleans the impurities inside the silt collecting box 14. After cleaning, the second bolt 18, the second nut 19 and the bottom plate 15 are reset.

[0037] like Figure 1-5As shown, when the user needs to use it, the valve stem 3, the connecting block, the valve plate 4, the sealing ring 5 and the pressure plate 6 are connected and fixed by the hexagon socket screws 7, which ensures the stability of the sealing ring 5. After the sealing ring 5 is damaged, it is easy to replace. Seal rings 5 ​​are provided on both sides of the valve plate 4. When the valve plate 4 is closed, the two sealing rings 5 ​​are simultaneously fitted with the inner wall of the valve body 1 to perform bidirectional sealing, thereby improving the sealing effect. At the same time, after one of the sealing rings 5 ​​is damaged, the other sealing ring 5 can still play a sealing role, ensuring its normal use and achieving the effect of multi-layer sealing, which effectively prevents the sealing pair from being eroded and damaged after long-term use. , leakage occurs, which extends the service life of the butterfly valve. Through the cooperation of the silt collecting trough 13, the silt collecting box 14, the first fixing ring 16, the bottom plate 15, the second fixing ring 17, the second bolt 18 and the second nut 19, while ensuring the sealing, it is convenient for the staff to disassemble the bottom plate 15 to clean the impurities deposited in the silt collecting box 14 to avoid blockage. Every once in a while, the staff will remove the second bolt 18 and the second nut 19 to separate the bottom plate 15 from the silt collecting box 14, clean the impurities inside the silt collecting box 14, and reset the second bolt 18, the second nut 19 and the bottom plate 15 after cleaning.

[0038] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0039] Finally, it should be pointed out that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the above embodiments, or that some of the technical features may be replaced with equivalents. Such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A double eccentric sealing butterfly valve, comprising a valve body (1) and a first connecting flange (2), characterized in that: The two first connecting flanges (2) are respectively arranged at the front and rear ends of the valve body (1); a valve stem (3) is arranged inside the valve body (1); connecting blocks are arranged on the front and rear surfaces of the valve stem (3); and the outer surface of the connecting block is connected to the valve plate (4); A sealing ring (5) is provided on the outer side of the valve plate (4), a pressure plate (6) is provided on one side of the sealing ring (5), an inner surface of the pressure plate (6) is threadedly connected with a hexagon socket screw (7), and a hand wheel (8) is provided on one side of the valve stem (3).

2. A double eccentric sealing butterfly valve according to claim 1, characterized in that: A second connecting flange (9) is provided on one side of the first connecting flange (2), and a filter plate (10) is fixedly mounted on the inner surface of the second connecting flange (9).

3. A double eccentric sealing butterfly valve according to claim 2, characterized in that: The inner wall of the second connecting flange (9) is threadedly connected to a first bolt (11), the outer wall of the first connecting flange (2) is provided with a first nut (12), one end of the first bolt (11) passes through the first connecting flange (2) and the second connecting flange (9), and is threadedly connected to the first nut (12).

4. A double eccentric sealing butterfly valve according to claim 2, characterized in that: A pipeline is provided on one side of the second connecting flange (9), a silt collecting trough (13) is provided at the bottom of the pipeline, a silt collecting box (14) is fixedly connected to the bottom of the silt collecting trough (13), a first fixing ring (16) is fixedly installed on one side of the silt collecting box (14), a plurality of first fixing rings (16) are provided, and the plurality of first fixing rings (16) are arranged around the silt collecting box (14) as a center point.

5. The double eccentric sealing butterfly valve according to claim 4, characterized in that: The bottom of the silt collecting box (14) is fitted with a bottom plate (15), and a second fixing ring (17) is fixedly installed on one side of the bottom plate (15). A plurality of second fixing rings (17) are provided, and the plurality of second fixing rings (17) are arranged around the silt collecting box (14) as a center point.

6. A double eccentric sealing butterfly valve according to claim 5, characterized in that: The inner wall of the second fixing ring (17) is threadedly connected with a second bolt (18), and the bottom of the first fixing ring (16) is provided with a second nut (19). The second bolt (18) penetrates the first fixing ring (16) and the second fixing ring (17) to form a threaded connection with the second nut (19).

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