Eccentric butterfly valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to an eccentric butterfly valve which comprises a valve body, a valve seat is installed in the valve body, a valve plate is arranged at the position of the valve seat, a valve rod is rotatably installed in the valve body through a bearing, a fixing block is fixedly arranged on the surface of the valve rod in a sleeved mode, box bodies are fixed to the two side walls of the fixing block, and the box bodies are fixed to the valve seat. The surface of the valve plate is tightly attached to the two box bodies, two inserting blocks are symmetrically fixed to the surface of the valve plate, and inserting openings matched with the inserting blocks are formed in the side walls of the two box bodies. Through the arrangement of the fixing block, the box body, the inserting block, the inserting opening, the clamping hole, the first connecting plate, the first pull rod, the first pull block, the first spring, the first right-angle triangular block, the second connecting plate, the second pull rod, the second pull block, the second spring, the second right-angle triangular block and the clamping block, the valve plate can be conveniently and rapidly disassembled and assembled, and therefore after the valve plate is damaged, the valve plate can be conveniently disassembled and assembled; and the device can be conveniently replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an eccentric butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure. It can be used for on-off control of low-pressure pipeline media. A butterfly valve refers to a valve with a closing member as a disc, which rotates around the valve shaft to achieve opening and closing. An eccentric butterfly valve is a type of butterfly valve in which the valve stem axis deviates from the center of the valve plate and the center of the body at the same time, and the sealing pair is an oblique cone. This is called an eccentric butterfly valve. The valve plate of the current eccentric butterfly valve is not easy to disassemble and assemble with the valve stem, so when the valve plate is damaged, it is not easy to replace it. Therefore, we proposed an eccentric butterfly valve to solve the above problem. Utility Model Content

[0003] (1) Technical problems solved

[0004] In view of the deficiencies in the prior art, the present invention provides an eccentric butterfly valve, which solves the problems raised in the above background technology.

[0005] (2) Technical solution

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0007] An eccentric butterfly valve comprises a valve body, a valve seat is installed inside the valve body, a valve plate is provided at the valve seat, a valve stem is rotatably installed in the valve body through a bearing, a fixed block is sleeved and fixed on the surface of the valve stem, and a box body is fixed on both side walls of the fixed block, the surface of the valve plate is tightly fitted with the two box bodies, two plug-in blocks are symmetrically fixed on the surface of the valve plate, the side walls of the two box bodies are provided with sockets adapted to the plug-in blocks, one end of the plug-in blocks is provided with a card hole, the interior of the box body is slidably connected to a first connecting plate, a first pull rod is fixed to one side wall of the first connecting plate, the first pull rod slides through an adjacent side wall of the box body and is fixed with a first pull block, and the surface of the first pull rod is sleeved with a first A spring, two ends of the first spring are respectively fixedly connected to an inner wall of one side adjacent to the box body and a side wall of the first connecting plate, the other side wall of the first connecting plate is fixed with a card block adapted to the card hole, one side wall of the card block is fixed with a first right-angled triangle block, the interior of the box body is slidably connected to a second connecting plate, one side wall of the second connecting plate is fixed with a second pull rod, the second pull rod slides through an adjacent side wall of the box body and is fixed with a second pull block, the surface of the second pull rod is sleeved with a second spring, the two ends of the second spring are respectively fixedly connected to a side wall of the second connecting plate and an inner wall of one side adjacent to the box body, the other side wall of the second connecting plate is fixed with a second right-angled triangle block adapted to the first right-angled triangle block.

[0008] Furthermore, a first sliding block is fixed to one side wall of the first connecting plate, and a first sliding groove adapted for the first sliding block is formed on one inner wall of the box body.

[0009] Furthermore, a second sliding block is fixed to one side wall of the second connecting plate, and a second sliding groove adapted for the second sliding block is formed on one inner wall of the box body.

[0010] Furthermore, two buckle grooves are symmetrically formed on the surfaces of the first pulling block and the second pulling block.

[0011] Furthermore, flanges are fixed on both ends of the valve body.

[0012] Furthermore, the inclined surface of the first right-angled triangle block is parallel to the inclined surface of the second right-angled triangle block.

[0013] (3) Beneficial effects

[0014] Compared with the prior art, the present invention provides an eccentric butterfly valve with the following beneficial effects:

[0015] The utility model can disassemble and assemble the valve plate more conveniently and quickly by arranging a fixed block, a box body, an insert block, a socket, a clamping hole, a first connecting plate, a first pull rod, a first pull block, a first spring, a first right-angled triangle block, a second connecting plate, a second pull rod, a second pull block, a second spring, a second right-angled triangle block and a clamping block, so that when the valve plate is damaged, it can be replaced more conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall first-view three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the overall second-view three-dimensional structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the box body of the utility model;

[0019] Figure 4 This is a schematic diagram of the side structure of the box body of the utility model;

[0020] Figure 5 For this utility model Figure 4 Schematic diagram of the cross-sectional structure along the middle line AA.

[0021] In the figure: 1. valve body; 2. valve seat; 3. valve plate; 4. valve stem; 5. fixing block; 6. box body; 7. plug block; 8. socket; 9. clamping hole; 10. first connecting plate; 11. first pull rod; 12. first pull block; 13. first spring; 14. first right-angled triangle block; 15. second connecting plate; 16. second pull rod; 17. second pull block; 18. second spring; 19. second right-angled triangle block; 20. first slider; 21. first slide groove; 22. second slider; 23. second slide groove; 24. flange; 25. clamping block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0023] Example

[0024] like Figure 1-5As shown, an eccentric butterfly valve proposed in one embodiment of the present invention includes a valve body 1, a valve seat 2 is installed inside the valve body 1, a valve plate 3 is provided at the valve seat 2, a valve stem 4 is rotatably installed in the valve body 1 through a bearing, a fixed block 5 is fixed on the surface of the valve stem 4, a box body 6 is fixed on both side walls of the fixed block 5, the surface of the valve plate 3 is tightly fitted with the two box bodies 6, two plug blocks 7 are symmetrically fixed on the surface of the valve plate 3, the side walls of the two box bodies 6 are provided with sockets 8 adapted to the plug blocks 7, and one end of the plug blocks 7 is provided with a card hole 9, the interior of the box body 6 is slidably connected with a first connecting plate 10, and a first pull rod 11 is fixed to one side wall of the first connecting plate 10, the first pull rod 11 slides through the adjacent side wall of the box body 6 and is fixed with a first pull block 12, the first pull rod The surface of 11 is sleeved with a first spring 13, and the two ends of the first spring 13 are fixedly connected to the inner wall of one side adjacent to the box body 6 and the one side wall of the first connecting plate 10, and the other side wall of the first connecting plate 10 is fixed with a block 25 adapted to the card hole 9, and one side wall of the block 25 is fixed with a first right-angled triangle block 14, and the interior of the box body 6 is slidably connected to the second connecting plate 15, and a second pull rod 16 is fixed to one side wall of the second connecting plate 15, and the second pull rod 16 slides through the side wall adjacent to the box body 6 and is fixed with a second pull block 17, and the surface of the second pull rod 16 is sleeved with a second spring 18, and the two ends of the second spring 18 are fixedly connected to the one side wall of the second connecting plate 15 and the inner wall of one side adjacent to the box body 6, and the other side wall of the second connecting plate 15 is fixed with a second pull rod 16 adapted to the first The second right-angled triangle block 19 of the right-angled triangle block 14, the inclined surface of the first right-angled triangle block 14 is parallel to the inclined surface of the second right-angled triangle block 19. It should be noted here that the top of the valve stem 4 is provided with a driving assembly, which can drive the valve stem 4 to rotate, but it is not shown in the drawings of the specification. This is a currently known technical means. When the valve plate 3 is damaged and needs to be replaced, the disassembly process is to pull the first pull block 12 outward. The first pull block 12 can drive the first pull rod 11 to move outward, and the first pull rod 11 can drive the corresponding first connecting plate 10 to move outward. At this time, the first spring 13 will be compressed, and the first connecting plate 10 can drive the corresponding block 25 to move outward, and the block 25 can drive the corresponding first right-angled triangle block 14 to move outward. When the first right-angled triangle block 14 moves outward, when the inclined surface of the first right-angled triangle block 14 fits with the inclined surface of the second right-angled triangle block 19, the first right-angled triangle block 14 continues to move outward, which can press the second right-angled triangle block 19 to move away from the blocking block 25. At this time, the second spring 18 will be compressed. When the inclined surface of the first right-angled triangle block 14 is separated from the inclined surface of the second right-angled triangle block 19, the second right-angled triangle block 19 can be driven to rebound under the elastic force of the second spring 18, thereby blocking the first right-angled triangle block 14. At this time, the blocking block 25 has been completely disengaged from the card hole 9, so that the insert block 7 can be disengaged from the corresponding box body 6, so the valve plate 3 can be disassembled. For the installation process of the valve plate 3,I will not go into details here.

[0025] like Figure 5 As shown, in some embodiments, a first slider 20 is fixed to one side wall of the first connecting plate 10, and a first sliding groove 21 adapted to the first slider 20 is opened on one inner wall of the box body 6, so that the first connecting plate 10 can move more stably in the box body 6, and a second slider 22 is fixed to one side wall of the second connecting plate 15, and a second sliding groove 23 adapted to the second slider 22 is opened on one inner wall of the box body 6, so that the second connecting plate 15 can move more stably in the box body 6.

[0026] like Figure 3 As shown, in some embodiments, two buckle grooves are symmetrically formed on the surfaces of the first pull block 12 and the second pull block 17 to facilitate users to buckle the first pull block 12 and the second pull block 17 with their hands.

[0027] like Figure 1 and Figure 2 As shown, in some embodiments, flanges 24 are fixed to both ends of the valve body 1 to facilitate the connection of pipelines.

[0028] Finally, it should be noted that the above description is merely 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 will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An eccentric butterfly valve, comprising a valve body (1), characterized in that: A valve seat (2) is installed inside the valve body (1), and a valve plate (3) is arranged on the valve seat (2). A valve stem (4) is rotatably installed in the valve body (1) via a bearing. A fixing block (5) is sleeved and fixed on the surface of the valve stem (4). Box bodies (6) are fixed to both side walls of the fixing block (5). The surface of the valve plate (3) is tightly fitted with the two box bodies (6). Two plug blocks (7) are symmetrically fixed on the surface of the valve plate (3). The two box bodies (6) The side walls are provided with sockets (8) adapted to the plug block (7), one end of the plug block (7) is provided with a clamping hole (9), the interior of the box body (6) is slidably connected with a first connecting plate (10), a first pull rod (11) is fixed to a side wall of the first connecting plate (10), the first pull rod (11) slides through an adjacent side wall of the box body (6) and is fixed with a first pull block (12), the surface of the first pull rod (11) is sleeved with a first spring (13), The two ends of the first spring (13) are respectively fixedly connected to an inner wall of one side adjacent to the box body (6) and a side wall of the first connecting plate (10); a clamping block (25) adapted to the clamping hole (9) is fixed to the other side wall of the first connecting plate (10); a first right-angled triangle block (14) is fixed to one side wall of the clamping block (25); a second connecting plate (15) is slidably connected to the interior of the box body (6); a second pull rod (16) is fixed to one side wall of the second connecting plate (15); the second pull rod (16) slides through a side wall adjacent to the box body (6) and is fixed to a second pull block (17); a second spring (18) is sleeved on the surface of the second pull rod (16); the two ends of the second spring (18) are respectively fixedly connected to a side wall of the second connecting plate (15) and an inner wall of one side adjacent to the box body (6); and a second right-angled triangle block (19) adapted to the first right-angled triangle block (14) is fixed to the other side wall of the second connecting plate (15).

2. An eccentric butterfly valve according to claim 1, characterized in that: A first sliding block (20) is fixed to one side wall of the first connecting plate (10), and a first sliding groove (21) adapted to fit the first sliding block (20) is provided on one inner wall of the box body (6).

3. The eccentric butterfly valve according to claim 1, characterized in that: A second sliding block (22) is fixed to one side wall of the second connecting plate (15), and a second sliding groove (23) adapted to fit the second sliding block (22) is provided on one inner wall of the box body (6).

4. The eccentric butterfly valve according to claim 1, characterized in that: Two buckle grooves are symmetrically formed on the surfaces of the first pull block (12) and the second pull block (17).

5. The eccentric butterfly valve according to claim 1, characterized in that: Flange plates (24) are fixed to both ends of the valve body (1).

6. The eccentric butterfly valve according to claim 1, characterized in that: The inclined surface of the first right-angled triangle block (14) is parallel to the inclined surface of the second right-angled triangle block (19).

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