Special flange for butterfly valve

Abstract

The utility model relates to the technical field of sealing valve bodies, and discloses a flange special for a butterfly valve, which comprises a butterfly valve body, a front flange pipe connected with the front side of the butterfly valve body and a rear flange pipe connected with the rear side of the butterfly valve body, and a waterproof rubber ring for sealing water flow in the butterfly valve body is arranged in the butterfly valve body. An insertion column for supporting the waterproof rubber ring is arranged between the front flange pipe and the rear flange pipe, the butterfly valve body comprises a connecting block at the top, a rotating shaft penetrates through the top of the connecting block, a turnover plate for opening and closing the butterfly valve body is arranged on the rotating shaft, and the turnover plate is attached to the waterproof rubber ring. The waterproof rubber ring is supported through the insertion column, the phenomenon that the waterproof rubber ring deviates when the turnover plate is turned over is reduced, so that the water leakage phenomenon is reduced in the long-term use of the butterfly valve body, the insertion column can be limited through the front flange pipe and the rear flange pipe, and the insertion column is prevented from deviating relative to the waterproof rubber ring.

Description

Technical Field

[0001] This utility model relates to the field of sealing valve body technology, and in particular to a flange specifically for butterfly valves. Background Technology

[0002] A butterfly valve is a simple regulating valve, also known as a flap valve. It is mainly used in pipelines to cut off and throttle fluids. The butterfly valve uses a circular disc as the opening and closing element. By rotating the valve stem, the disc rotates within the valve body to open, close, or regulate the flow rate. The disc rotates around its axis within the cylindrical channel of the valve body, with a rotation angle typically between 0° and 90°. When the disc rotates to 90°, the valve is fully open. By changing the rotation angle of the disc, the flow rate of the medium can be adjusted.

[0003] In existing butterfly valves, two waterproof seals are used to clamp and seal the rotating shaft. At the same time, the waterproof seals need to be interference-fitted with the outer diameter of the butterfly plate to reduce water flow caused by incomplete closure when the butterfly plate is closed. However, with the butterfly plate rotating for a long time, the waterproof seals can easily be lifted. When the waterproof seals are lifted, water will flow out from the gaps in the butterfly valve, causing leakage. Utility Model Content

[0004] To address the issue that prolonged rotation of the butterfly valve can cause the waterproof seal to lift, resulting in water leakage, the following measures are needed.

[0005] The technical solution of this utility model is as follows: a special flange for butterfly valves, including a butterfly valve body, a front flange pipe connected to the front side of the butterfly valve body and a rear flange pipe connected to the rear side of the butterfly valve body. The butterfly valve body is provided with a waterproof rubber ring inside to seal the water flow inside the butterfly valve body. A plug is provided between the front flange pipe and the rear flange pipe to support the waterproof rubber ring. The butterfly valve body includes a connecting block at the top, and a rotating shaft passes through the top of the connecting block. A flip plate for opening and closing the butterfly valve body is provided on the rotating shaft. The flip plate is in contact with the waterproof rubber ring.

[0006] Preferably, the butterfly valve body also includes a front valve body located at the front, and a rear valve body is provided at the rear of the front valve body. A channel that runs through the front and rear can be formed between the front valve body and the rear valve body. The number of waterproof rubber rings is two, distributed front and rear. The two waterproof rubber rings can fit into the channel and can wrap the rotating shaft.

[0007] Preferably, the waterproof rubber ring includes a tubular ring that fits the pipe. The tubular ring has a flange protruding away from the axis of rotation on the side away from the axis of rotation. The front valve body includes a front flange two and the rear valve body includes a rear flange three. The flange of one waterproof rubber ring is attached to the front side of the flange two and the flange of the other waterproof rubber ring is attached to the rear side of the flange three. The tubular rings of the two waterproof rubber rings are tightly attached inside the pipe. Both tubular rings have a support hole that runs from front to back. The support holes of the two tubular rings can be inserted into the same way by a plunger.

[0008] Preferably, the front flange includes a rear flange 1 that can fit into the flange of the front waterproof rubber ring of the front valve body; the rear flange includes a front flange 4 that can fit into the flange of the rear waterproof rubber ring of the rear valve body.

[0009] Preferably, flange one has a front hole corresponding to the insert post on the rear side, the front hole being a blind hole, and flange four has a through hole one on the front side, the hole one and the front hole being able to fit with the outer diameter of the insert post.

[0010] Preferably, a second hole is coaxially provided on the rear side of the first hole, and a third hole is provided on the rear side of the second hole. A threaded surface is provided at the inner diameter of the second hole, and a limit bolt is engaged with the threaded surface.

[0011] Preferably, the limiting bolt includes a bolt head, the front side of which is provided with a threaded post that engages with the threaded surface of the second hole, and the front side of the threaded post is provided with a top post that can be inserted into the second hole.

[0012] The beneficial effects of this utility model are as follows: By supporting the waterproof rubber ring with the insert, the phenomenon of the waterproof rubber ring shifting when the flip plate is flipped is reduced, thereby reducing the occurrence of water leakage in the butterfly valve body during long-term use. The front flange pipe and the rear flange pipe can limit the insert to prevent the insert from shifting relative to the waterproof rubber ring. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the flange structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the top column structure of this utility model;

[0017] Figure 5 This is a schematic diagram of the tubular ring structure of this utility model.

[0018] Explanation of reference numerals in the attached drawings: 1. Butterfly valve body; 10. Waterproof rubber ring; 101. Flange; 1011. Support hole; 1012. Insert post; 102. Tubular ring; 11. Front valve body; 111. Flange 2; 12. Rear valve body; 121. Flange 3; 13. Rotating shaft; 14. Connecting block; 141. Flip plate; 21. Front flange pipe; 211. Flange 1; 2111. Front hole; 22. Rear flange pipe; 221. Flange 4; 2211. Hole 1; 2212. Hole 2; 2213. Hole 3; 3. Limit bolt; 31. Bolt head; 32. Threaded post; 33. Top post. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Please see Figure 1 - Figure 5This utility model provides an embodiment: a flange specifically for a butterfly valve, including a butterfly valve body 1, a front flange pipe 21 connecting the front side of the butterfly valve body 1, and a rear flange pipe 22 connecting the rear side of the butterfly valve body 1. The butterfly valve body 1 has a waterproof rubber ring 10 inside to seal the water flow inside. A stud 1012 supporting the waterproof rubber ring 10 is provided between the front flange pipe 21 and the rear flange pipe 22. The butterfly valve body 1 includes a connecting block 14 at the top, with a rotating shaft 13 passing through the top of the connecting block 14. A flip plate 141 for opening and closing the butterfly valve body 1 is provided on the rotating shaft 13. The flip plate 141 is in contact with the waterproof rubber ring 10, and the waterproof rubber ring 10 is supported by the stud 1012. To reduce the displacement of the waterproof rubber ring 10 when the flip plate 141 flips, thereby reducing water leakage in the butterfly valve body 1 during long-term use, the front flange pipe 21 and the rear flange pipe 22 can limit the insertion post 1012 to prevent it from shifting relative to the waterproof rubber ring 10. The butterfly valve body 1 also includes a front valve body 11 located at the front, and a rear valve body 12 located at the rear of the front valve body 11. A through-passage can be formed between the front valve body 11 and the rear valve body 12. The number of waterproof rubber rings 10 is two, distributed front and rear. The two waterproof rubber rings 10 can fit into the channel and wrap around the rotating shaft 13. The two waterproof rubber rings 10 can control the rotation of the shaft. 13 is clamped to form a wrap to prevent water from leaking out from the rotation point of the rotating shaft 13. The channel is used for water flow. The waterproof rubber ring 10 includes a tubular ring 102 that fits the pipe. The tubular ring 102 has a flange 101 that protrudes away from the axis of the tubular ring 102 on the side away from the rotating shaft 13. The front valve body 11 includes a front flange 2 111, and the rear valve body 12 includes a rear flange 3 121. The flange 101 of one waterproof rubber ring 10 fits the front side of the flange 2 111, and the flange 101 of the other waterproof rubber ring 10 fits the rear side of the flange 3 121. The tubular rings 102 of the two waterproof rubber rings 10 are tightly fitted inside the pipe. Both tubular rings 102 have a through-hole design from front to back. The support hole 1011 of the two tubular rings 102 can be inserted together by the insert post 1012. The waterproof rubber ring 10 on the front side of the butterfly valve body 1 is clamped and fixed by the cooperation of flange 1 211 and flange 2 111. The waterproof rubber ring 10 on the rear side of the butterfly valve body 1 is clamped and fixed by the cooperation of flange 3 121 and flange 4 221, reducing the occurrence of displacement. The insert post 1012 is inserted in the support hole 1011 to prevent the rotating shaft 13 from driving the flip plate 141 to rotate and causing the waterproof rubber ring 10 to shift. The front flange tube 21 includes the rear flange 1 211. The flange 1 211 can fit the flange 101 of the front waterproof rubber ring 10 on the front side of the front valve body 11.The rear flange pipe 22 includes a front flange 221, which can fit against the flange 101 of the waterproof rubber ring 10 on the rear side of the rear valve body 12, forming a clamping surface through the flange 101 of the waterproof rubber ring 10.

[0021] Please see Figure 2 - Figure 5 In this embodiment, the rear side of flange 1 211 is provided with a front hole 2111 corresponding to the insert post 1012. The front hole 2111 is a blind hole. The front side of flange 4 221 is provided with a through hole 2211. The through hole 2211 and the front hole 2111 can fit with the outer diameter of the insert post 1012. The non-through front hole 2111 prevents the insert post 1012 from continuing to move forward in the front hole 2111. The through hole 2211 facilitates the insertion of the insert post 1012 into the front hole 2111. The rear side of the through hole 1 2211 is coaxially provided with a second hole 2212. The rear side of the through hole 2212 is provided with a third hole 2213. The inner diameter of the through hole 2212 is provided with a thread. The threaded surface of the hole 2212 is used to connect the limiting bolt 3. The threaded surface of the hole 2212 facilitates the installation of the limiting bolt 3 and reduces the possibility of the insertion post 1012 moving backward due to the limiting bolt 3 falling off. The limiting bolt 3 includes a bolt head 31. The front side of the bolt head 31 is provided with a threaded post 32 that engages with the threaded surface of the hole 2212. The front side of the threaded post 32 is provided with a top post 33 that can be inserted into the hole 2212. The insertion of the top post 33 into the hole 2212 blocks the path of the insertion post 1012 moving backward, allowing the insertion post 1012 to pass through the support holes 1011 of the two waterproof rubber rings 10 and be restricted in the front hole 2111.

[0022] During operation, the rotating shaft 13 first needs to be connected to a drive assembly. The drive assembly is existing technology and can be a motor or hydraulic cylinder. When the drive assembly drives the rotating shaft 13 to rotate, the rotating shaft 13 drives the tilting plate 141 to rotate together. The tilting plate 141 moves tightly against the tubular ring 102 of the waterproof rubber ring 10. Several support holes 1011 at the tubular ring 102 are pierced by corresponding number and position of inserts 1012, which prevents tilting. The tubular rings 102 of the two waterproof rubber rings 10 are tightly pressed and squeezed against each other, preventing... Water leaks out from the butterfly valve body 1. The front hole 2111 and the first hole 2211 limit the insertion post 1012 to prevent it from moving up and down or left and right. The top post 33 holds the insertion post 1012 in place to prevent it from moving backward. The blind hole structure of the front hole 2111 prevents the insertion post 1012 from moving forward. The front flange pipe 21 and the rear flange pipe 22 can clamp and fix the waterproof rubber ring 10 on the front side and the waterproof rubber ring 10 on the rear side of the butterfly valve body 1, respectively, so that the position of the waterproof rubber ring 10 is stable.

[0023] Through the above steps, the insert 1012 supports the waterproof rubber ring 10, reducing the offset of the waterproof rubber ring 10 when the flip plate 141 flips, thereby reducing the occurrence of water leakage in the butterfly valve body 1 during long-term use. This solves the problem that the butterfly plate flips for a long time, which can easily cause the waterproof seal to lift up. When the waterproof seal lifts up, water will flow out from the gaps in the butterfly valve, causing leakage.

Claims

1. A flange specifically for butterfly valves, comprising a butterfly valve body (1), characterized in that: It also includes a front flange pipe (21) connecting the front side of the butterfly valve body (1) and a rear flange pipe (22) connecting the rear side of the butterfly valve body (1). The butterfly valve body (1) is provided with a waterproof rubber ring (10) to seal the water flow inside the butterfly valve body (1). A plug (1012) is provided between the front flange pipe (21) and the rear flange pipe (22) to support the waterproof rubber ring (10). The butterfly valve body (1) includes a connecting block (14) at the top. A rotating shaft (13) passes through the top of the connecting block (14). A flip plate (141) is provided on the rotating shaft (13) to open and close the butterfly valve body (1). The flip plate (141) is in contact with the waterproof rubber ring (10).

2. The butterfly valve flange according to claim 1, characterized in that: The butterfly valve body (1) also includes a front valve body (11) located on the front side, and a rear valve body (12) is provided on the rear side of the front valve body (11). A channel that runs through the front and rear can be formed between the front valve body (11) and the rear valve body (12). The number of waterproof rubber rings (10) is two, distributed in front and rear. The two waterproof rubber rings (10) can fit into the channel and can wrap the rotating shaft (13).

3. The butterfly valve flange according to claim 2, characterized in that: The waterproof rubber ring (10) includes a tubular ring (102) that fits the pipe. The tubular ring (102) has a flange (101) that protrudes away from the axis of the tubular ring (102) on the side away from the pivot (13). The front valve body (11) includes a front flange two (111), and the rear valve body (12) includes a rear flange three (121). The flange (101) of one waterproof rubber ring (10) fits the front side of the flange two (111), and the flange (101) of the other waterproof rubber ring (10) fits the rear side of the flange three (121). The tubular rings (102) of the two waterproof rubber rings (10) fit tightly inside the pipe. Both tubular rings (102) have a support hole (1011) that runs from front to back. The support holes (1011) of the two tubular rings (102) can be inserted by the insertion post (1012).

4. The butterfly valve flange according to claim 3, characterized in that: The front flange (21) includes a rear flange (211), which can fit the flange (101) of the front waterproof rubber ring (10) of the front valve body (11); the rear flange (22) includes a front flange (221), which can fit the flange (101) of the rear waterproof rubber ring (10) of the rear valve body (12).

5. The butterfly valve flange according to claim 4, characterized in that: Flange 1 (211) has a front hole (2111) on the rear side that corresponds to the insert (1012). The front hole (2111) is a blind hole. Flange 4 (221) has a through hole (2211) on the front side. The hole (2211) and the front hole (2111) can fit with the outer diameter of the insert (1012).

6. The butterfly valve flange according to claim 5, characterized in that: Hole 2 (2212) is coaxially provided on the rear side of Hole 1 (2211), and Hole 3 (2213) is provided on the rear side of Hole 2 (2212). A threaded surface is provided at the inner diameter of Hole 2 (2212), and a limit bolt (3) is engaged with the threaded surface.

7. The flange for butterfly valves according to claim 6, characterized in that: The limiting bolt (3) includes a bolt head (31), and the front side of the bolt head (31) is provided with a threaded post (32) that engages with the threaded surface of the second hole (2212). The front side of the threaded post (32) is provided with a top post (33) that can be inserted into the second hole (2212).

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