Five-eccentric center butterfly valve

Abstract

The invention relates to the technical field of butterfly valves, and discloses a five-eccentric butterfly valve which comprises a valve body, a valve plate and an operation structure, a circulation channel is formed in the valve body, the valve plate is rotationally connected into the circulation channel, a rotating ring is rotationally connected to the valve plate, the rotating ring abuts against the inner wall of the circulation channel, a movable spring is arranged on the valve body, and a movable strip is arranged on the movable spring. The rotating ring is provided with a moving groove allowing the moving strip to be inserted therein, the moving spring drives the moving strip to be inserted into the moving groove, the valve body is provided with a sliding assembly used for driving the moving strip to move, and the valve body is provided with a reset assembly used for achieving reset of the moving strip. When the moving strip drives the rotating ring to rotate, the moving groove moves in the direction away from the moving strip, and the moving strip is disengaged from the moving groove. Through rotation of the rotating ring, the two different sides of the rotating ring are impacted, the rotating ring can be evenly impacted, and the situation that the same position is impacted for a long time, and consequently the valve plate is damaged is avoided; therefore, the service life of the valve plate is prolonged, and the butterfly valve can be used for a long time.

Description

Technical Field

[0001] The present application relates to the technical field of butterfly valves, and in particular to a five-eccentric butterfly valve. Background Art

[0002] A butterfly valve is a valve used to control fluid flow. Its main feature is that a disc-shaped butterfly plate rotates around the valve shaft to open, close or regulate fluid flow. A five-eccentric butterfly valve is a type of butterfly valve. It is a valve widely used in industrial fluid control systems. The five-eccentric butterfly valve is suitable for high pressure, high temperature, ultra-low temperature and various corrosive environments.

[0003] In the related technology, the butterfly valve includes a valve body, an operating structure and a valve plate. A circulation channel is opened on the valve body. The valve plate is rotatably connected to the circulation channel. The valve plate is used to block the circulation channel. The operating structure is used to drive the valve plate to rotate. When the valve plate rotates, the valve plate opens and closes the circulation channel.

[0004] When the circulation channel is about to close, the valve plate blocks the circulation channel, and the channel of the circulation channel is reduced, which increases the flow velocity of the fluid in the circulation channel and increases the impact force of the fluid impacting the circulation channel. At this time, the valve plate is subjected to the greatest impact. After long-term use of the butterfly valve, both sides of the valve plate may be damaged by the impact of the fluid, affecting the sealing performance of the butterfly valve. Summary of the Invention

[0005] In order to improve the problem that both sides of the valve plate are easily damaged, the present application provides a five-eccentric butterfly valve.

[0006] This application provides a five-eccentric butterfly valve, which adopts the following technical solution: A five-eccentric butterfly valve comprises a valve body, a valve plate and an operating structure, wherein the valve body is provided with a circulation channel, the valve plate is rotatably connected to the circulation channel, the operating structure is used to drive the valve plate to open and close the circulation channel, the valve plate is rotatably connected to a rotating ring, the rotating ring abuts the inner wall of the circulation channel, the valve body is provided with a moving spring, the moving spring is provided with a moving bar, the rotating ring is provided with a moving groove for inserting the moving bar, the moving spring drives the moving bar to insert into the moving groove, the valve body is provided with a sliding component for driving the moving bar to move, and the valve body is provided with a reset component for realizing the reset of the moving bar; when the moving bar drives the rotating ring to rotate, the moving groove moves in a direction away from the moving bar, so that the moving bar is separated from the moving groove.

[0007] When the cam is in a closed position, the spring will push the cam away from the piston and the piston will move in a direction away from the piston, and the piston will not be restricted by the piston rod, so the piston rod will not be restricted by the piston rod, and the piston rod will not be restricted by the piston rod. Finally, the resetting assembly resets the piston bar so that the subsequent resetting assembly can drive the piston bar to be inserted into the resetting groove; if the two sides of the rotating ring are damaged by the impact of the fluid when the valve plate is closed, the rotation of the rotating ring will make different sides of the rotating ring be impacted, so that the rotating ring can be impacted evenly, avoiding long-term impact on the same position and causing damage to the valve plate, thereby extending the service life of the valve plate and allowing the butterfly valve to be used for a long time.

[0008] Optionally, a placement groove is provided on the valve body, the movable spring is arranged in the placement groove, the reset assembly includes a blocking spring and a blocking plate, the blocking spring is arranged on the blocking plate, the blocking spring is arranged on the valve body, the blocking spring drives the blocking plate to block the placement groove, a blocking block is provided on the blocking plate, and the blocking block is located on the moving path of the valve plate; when the valve plate blocks the circulation channel, the blocking plate does not block the placement groove; when the valve plate does not block the circulation channel, the blocking plate blocks the placement groove.

[0009] By adopting the above technical solution, the blocking plate is driven to move by the blocking spring, so that the blocking plate blocks the placement groove. Since the blocking block is located on the moving path of the valve plate, the valve plate can drive the blocking plate to move through the blocking block when it rotates; when the valve plate blocks the flow channel, the valve plate drives the blocking plate to move through the blocking block, so that the blocking plate does not block the placement groove; when the valve plate does not block the flow channel, the valve plate does not abut the blocking block. At this time, the blocking spring drives the blocking plate to block the placement groove, so that the moving bar and the moving spring are not easily affected by the impact of the fluid, thereby reducing the damage to the moving spring caused by the impact and extending the service life of the moving spring.

[0010] Optionally, a moving slope is provided on the moving bar, and the distance between the moving slope and the blocking spring gradually increases along the direction from the moving spring to the moving bar, and the moving slope is located in the moving path of the blocking plate.

[0011] By adopting the above technical solution, the distance between the moving inclined surface and the blocking spring gradually increases along the direction from the moving spring to the moving bar, and the moving inclined surface is located in the moving path of the blocking plate. When the blocking plate is in the blocking placement groove, the blocking plate drives the moving bar to move through the moving inclined surface, so that the moving bar can move into the placement groove, thereby realizing the resetting of the moving bar.

[0012] Optionally, the reset assembly further includes a reset spring, the valve body is slidably connected to a moving block, the moving spring is arranged on the moving block, and the reset spring drives the moving block to reset.

[0013] By adopting the above technical solution, a reset spring is set on the moving block, so that the reset spring drives the moving block to reset; when the sliding assembly drives the moving bar to move, the moving bar drives the moving block to move through the moving spring. At this time, the moving spring does not need to bend, further reducing the damage to the moving spring and extending the service life of the moving spring.

[0014] Optionally, the sliding assembly includes a sliding bar, the sliding bar is slidably connected to the valve body, the moving bar is located on a moving path of the sliding bar, and the sliding bar drives the moving bar to slide.

[0015] By adopting the above technical solution, the sliding bar drives the moving bar to slide, and the sliding bar drives the rotating ring to rotate through the moving bar, so that the staff can realize the rotation of the rotating ring and reduce the damage to both sides of the rotating ring due to long-term impact.

[0016] Optionally, the sliding assembly also includes a limit bar, which is slidably connected to the valve body, and the operating structure includes a handwheel and an operating member. The handwheel is rotatably connected to the valve body, and the handwheel drives the valve plate to rotate through the operating member. The handwheel is provided with a plurality of through-holes, and the limit bar can be inserted into the through-holes; when the limit bar is located in the through-holes, the handwheel cannot rotate, and the moving bar is located in the moving groove; when the limit bar is disengaged from the through-holes, the handwheel can rotate, and the moving bar is disengaged from the moving groove, and at this time the rotating ring rotates.

[0017] By adopting the above technical solution, the limit bar is slidably connected to the valve body, and the staff slides the limit bar to allow the limit bar to drive the sliding bar to move; since the limit bar is located in the through-hole, it is difficult for the handwheel to rotate, so that the limit bar can limit the handwheel, avoiding people accidentally touching the handwheel to rotate the handwheel and causing the valve to open and close; when the staff wants to turn the handwheel, the staff needs to first separate the limit bar from the through-hole, and allow the limit bar to realize the rotation of the rotating ring through the sliding bar and the moving bar.

[0018] Optionally, a sliding slope is provided on the sliding bar, and the distance between the sliding slope and the moving bar gradually increases along the insertion direction of the limiting bar, and the sliding slope is located in the insertion path of the limiting bar.

[0019] By adopting the above technical solution, the sliding slope is located on the insertion path of the limit bar, and the distance between the sliding slope and the moving bar gradually increases along the insertion direction of the limit bar, so that the limit bar can drive the sliding bar to move, and the sliding bar can drive the movement of the moving bar.

[0020] Optionally, a plurality of stop blocks are slidably connected to the handwheel, and the limit bar is provided with stop holes for the stop blocks to be inserted into; when the stop blocks are inserted into the stop holes, the limit bar is fixed at the perforations.

[0021] By adopting the above technical solution, the stop block is inserted into the stop hole to limit the limit bar, so that the limit bar and the handwheel can be fixed to each other, avoiding the possibility of external personnel accidentally pushing the limit bar.

[0022] Optionally, a first magnet is provided on the limiting bar, and a second magnet is provided in the through hole, and the second magnet attracts the first magnet; when the second magnet attracts the first magnet, the limiting bar is located in the through hole.

[0023] By adopting the above technical solution, the second magnet absorbs the first magnet, so that the limit bar can be stably located in the through-hole, thereby fixing the limit bar and the handwheel to each other and preventing the limit bar from accidentally sliding in the handwheel.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. When the valve plate blocks the flow channel, the moving spring drives the moving bar to be inserted into the moving groove. At this time, the moving bar and the rotating ring are fixed to each other. The staff drives the sliding assembly to allow the sliding assembly to drive the moving bar to move, and the moving bar drives the rotating ring to rotate. Due to the rotation of the rotating ring, the moving groove moves in the direction away from the moving bar, allowing the rotating ring to drive the moving bar to move along the rotation direction of the rotating ring, and the moving spring is deformed until the moving bar is disengaged from the moving groove and the valve plate rotates, so that the rotating ring does not restrict the moving bar, and finally the reset assembly resets the moving bar so that the subsequent moving spring drives the moving bar to be inserted into the moving groove; if both sides of the rotating ring are damaged by the impact of the fluid when the valve plate is closed, the rotation of the rotating ring will cause different sides of the rotating ring to be impacted, so that the rotating ring can be impacted evenly, avoiding long-term impact on the same position and causing damage to the valve plate, thereby extending the service life of the valve plate and allowing the butterfly valve to be used for a long time.

[0025] 2. The sealing plate is driven to move by the sealing spring, so that the sealing plate blocks the placement groove. Since the sealing block is located on the moving path of the valve plate, the valve plate can drive the sealing plate to move through the sealing block when it rotates; when the valve plate blocks the flow channel, the valve plate drives the sealing plate to move through the sealing block, so that the sealing plate does not block the placement groove; when the valve plate does not block the flow channel, the valve plate does not abut the sealing block. At this time, the sealing spring drives the sealing plate to block the placement groove, so that the moving bar and the moving spring are not easily affected by the impact of the fluid, thereby reducing the damage to the moving spring caused by the impact and extending the service life of the moving spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of an embodiment of the present application; Figure 2 It is along Figure 1 Partial cross-sectional view along line AA; Figure 3 This is a structural diagram highlighting the reset component in an embodiment of the present application; Figure 4 It is along Figure 1 Partial cross-sectional view of the midline BB; Figure 5 yes Figure 4 A magnified schematic diagram of part C; Figure 6 This is a structural diagram highlighting the sliding assembly in an embodiment of the present application; Figure 7 It is an exploded schematic diagram highlighting the stop block in the embodiment of the present application.

[0027] Figure markings: 1. valve body; 11. circulation channel; 12. placement groove; 121. accommodating groove; 13. moving block; 131. moving spring; 132. moving bar; 133. moving inclined surface; 14. through hole; 2. valve plate; 21. rotating ring; 22. moving groove; 3. operating structure; 31. hand wheel; 32. operating member; 33. through hole; 34. stop block; 35. second magnet; 4. sliding assembly; 41. sliding bar; 411. sliding inclined surface; 42. limiting bar; 421. stop hole; 422. first magnet; 5. reset assembly; 51. blocking spring; 52. blocking plate; 521. blocking block; 53. reset spring. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-7 This application is described in further detail.

[0029] This embodiment discloses a five-eccentric butterfly valve. Figure 1 A five-eccentric butterfly valve includes a valve body 1, a valve plate 2, and an operating structure 3. The valve body 1 is provided with a flow channel 11 for fluid to pass through. The valve plate 2 is rotatably connected to the flow channel 11, and the operating structure 3 is used to rotate the valve plate 2.

[0030] Reference Figure 2 A rotating ring 21 is rotatably connected to the valve plate 2, capable of abutting the inner wall of the circulation channel 11. A placement groove 12 is defined on the inner wall of the circulation channel 11, within which a moving block 13 is slidably connected, capable of vertical movement. A moving spring 131 is fixedly connected to the surface of the moving block 13 facing away from the bottom wall of the placement groove 12, and a moving bar 132 is fixedly connected to the surface of the moving spring 131 facing away from the moving block 13.

[0031] Reference Figure 2 The moving spring 131 drives the moving bar 132 to protrude from the placement slot 12. A plurality of moving slots 22 for the moving bar 132 to be inserted into are formed on the surface of the rotating ring 21. The plurality of moving slots 22 are arranged in an array along the circumference of the rotating ring 21. When the moving bar 132 protrudes from the placement slot 12, the moving spring 131 is in a non-stressed state. When the moving bar 132 is completely within the placement slot 12, the moving spring 131 is in a compressed state.

[0032] Reference Figure 1 and Figure 3 The valve body 1 is provided with a sliding component 4 for driving the moving bar 132 to move, and the valve body 1 is provided with a reset component 5 for driving the moving bar 132 to reset. The reset component 5 includes a blocking spring 51, a blocking plate 52 and a reset spring 53.

[0033] Reference Figure 3 and Figure 4 The wall of the placement slot 12 defines a receiving slot 121, which extends along the direction of fluid flow. One end of a blocking spring 51 is fixedly connected to the bottom wall of the receiving slot 121, while the other end of the blocking spring 51 is fixedly connected to a blocking plate 52. The blocking plate 52 is capable of blocking the opening of the placement slot 12. Specifically, when the blocking plate 52 blocks the opening of the placement slot 12, the blocking spring 51 is compressed. When the blocking plate 52 is completely within the receiving slot 121, the blocking spring 51 is also compressed.

[0034] Reference Figure 5 , a through hole 14 is provided on the surface of the valve body 1, and the through hole 14 is connected to the opening of the accommodating groove 121. A blocking block 521 is fixedly connected to the surface of the sealing plate 52, and the blocking block 521 is located in the circulation channel 11 through the through hole 14, that is, the blocking block 521 is located on the rotation path of the valve plate 2. When the valve plate 2 opens and closes the circulation channel 11, the valve plate 2 can drive the blocking block 521 to move. When the valve plate 2 blocks the circulation channel 11, the blocking block 521 is located on the side of the valve plate 2 facing the fluid, and at this time the blocking plate 52 blocks the opening of the placement groove 12. When the valve plate 2 does not block the circulation channel 11, the blocking spring 51 drives the blocking plate 52 to move, so that the blocking plate 52 blocks the opening of the placement groove 12.

[0035] Reference Figure 2 and Figure 3 A movable bevel 133 is formed on the surface of the movable bar 132. The distance between the movable bevel 133 and the bottom wall of the receiving groove 121 gradually increases along the direction from the movable spring 131 to the movable bar 132. The movable bevel 133 is located on the moving path of the blocking plate 52. When the blocking plate 52 moves away from the bottom wall of the receiving groove 121, the blocking plate 52 drives the movable bar 132 to move into the placement groove 12 via the movable bevel 133, thereby sealing the placement groove 12 with the blocking plate 52.

[0036] Reference Figure 2 and Figure 3 One end of the return spring 53 is fixedly connected to the wall of the placement slot 12, and the other end of the return spring 53 is fixedly connected to the surface of the moving block 13. The return spring 53 drives the moving block 13 to move upward. When the moving bar 132 protrudes from the placement slot 12 and is separated from the moving slot 22, the return spring 53 is in a compressed state. When the moving bar 132 is completely within the placement slot 12 and abuts the wall above the placement slot 12, the return spring 53 is in a non-stressed state. The upper and lower parts in this application are the upper and lower parts of this figure.

[0037] Reference Figure 2 and Figure 6 The sliding assembly 4 includes a sliding bar 41 and a limiting bar 42. The sliding bar 41 is connected to the valve body 1 in a sliding manner in the vertical direction, and the limiting bar 42 is connected to the valve body 1 in a sliding manner in the horizontal direction. The sliding bar 41 can be inserted into the placement groove 12, and the sliding bar 41 is located on the side of the moving bar 132 away from the return spring 53. A sliding inclined surface 411 is provided on the end surface of the sliding bar 41 away from the placement groove 12. The distance between the sliding inclined surface 411 and the moving bar 132 gradually increases along the direction from the moving spring 131 to the moving bar 132, and the sliding inclined surface 411 is located on the moving path of the limiting bar 42. The limiting bar 42 is located on the side of the sliding bar 41 along the direction from the moving bar 132 to the moving spring 131, and the limiting bar 42 protrudes from the valve body 1.

[0038] Reference Figure 2 and Figure 6 When the staff slides the limit bar 42, the limit bar 42 is driven to move by the sliding inclined surface 411, and the limit bar 42 abuts against the moving bar 132 and falls. At this time, the moving bar 132 is located in the moving groove 22, and the moving bar 132 drives the rotating ring 21 to rotate. Since the rotating ring 21 is annular, the moving bar 132 drives the rotating ring 21 to rotate, and the moving bar 132 gradually disengages from the moving groove 22 during the process until the moving bar 132 completely disengages from the moving groove 22.

[0039] Reference Figure 1 and Figure 6 The operating structure 3 includes a handwheel 31 and an operating member 32. When the handwheel 31 rotates, the handwheel 31 can drive the operating member 32 to rotate the valve plate 2. A plurality of through-holes 33 are formed on the surface of the handwheel 31. The through-holes 33 are for inserting the limit bars 42, and the through-holes 33 are distributed in an array along the circumference of the handwheel 31.

[0040] Reference Figure 7A plurality of stop blocks 34 are slidably connected to the surface of the hand wheel 31, and a plurality of stop holes 421 for inserting the stop blocks 34 are opened on the surface of the limit bar 42. When the stop blocks 34 are inserted into the stop holes 421, the limit bar 42 can be located in the through hole 33.

[0041] Reference Figure 7 A first magnet 422 is fixedly connected to the surface of the limit bar 42, and a second magnet 35 is fixedly connected to the wall of the through-hole 33. The second magnet 35 attracts the first magnet 422. When the limit bar 42 is inserted into the through-hole 33, the second magnet 35 attracts the first magnet 422, allowing the limit bar 42 to be stably positioned in the through-hole 33. At this time, the stop block 34 aligns with the stop hole 421, allowing the limit bar 42 to be stably positioned on the handwheel 31.

[0042] The implementation principle of a five-eccentric butterfly valve in the embodiment of the present application is as follows: the staff first slides the stop block 34, pushes the limit bar 42 out of the perforation 33, and allows the limit bar 42 to drive the moving bar 132 to move through the sliding bar 41, and the moving bar 132 drives the rotating ring 21 to rotate until the moving bar 132 disengages the moving groove 22. Then the staff rotates the handwheel 31, and allows the handwheel 31 to drive the valve plate 2 to rotate through the operating member 32, so that the valve plate 2 opens the flow channel 11. At this time, the blocking spring 51 drives the blocking plate 52 to move, and allows the blocking plate 52 to drive the moving bar 132 to move into the placement groove 12 through the moving inclined surface 133, and the blocking plate 52 blocks the opening of the placement groove 12. At this time, the reset spring 53 drives the moving block 13 to reset, allowing the moving bar 132 to reset, so that the limit bar 42 can be smoothly inserted into the perforation 33. The staff finally moves the stop block 34, allowing the stop block 34 to be inserted into the stop hole 421, to achieve mutual fixation of the limit bar 42 and the handwheel 31.

[0043] Unless otherwise defined, the technical or scientific terms used in this application shall have the usual meanings understood by persons of ordinary skill in the field to which this application belongs. The words "first", "second", "third" and similar terms used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one" or "a" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprises" cover the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present application should be included in the scope of protection of the present application.

Claims

1. A five-eccentric butterfly valve, comprising a valve body (1), a valve plate (2) and an operating structure (3), wherein the valve body (1) is provided with a circulation channel (11), the valve plate (2) is rotatably connected in the circulation channel (11), and the operating structure (3) is used to drive the valve plate (2) to open and close the circulation channel (11), characterized in that: The valve plate (2) is rotatably connected to a rotating ring (21), the rotating ring (21) abuts against the inner wall of the circulation channel (11), the valve body (1) is provided with a moving spring (131), the moving spring (131) is provided with a moving bar (132), the rotating ring (21) is provided with a moving groove (22) for inserting the moving bar (132), the moving spring (131) drives the moving bar (132) to be inserted into the moving groove (22), the valve body (1) is provided with a sliding component (4) for driving the moving bar (132) to move, and the valve body (1) is provided with a resetting component (5) for realizing the resetting of the moving bar (132); when the moving bar (132) drives the rotating ring (21) to rotate, the moving groove (22) moves in a direction away from the moving bar (132), so that the moving bar (132) is separated from the moving groove (22).

2. A five-eccentric butterfly valve according to claim 1, characterized in that: The valve body (1) is provided with a placement groove (12), the movable spring (131) is arranged in the placement groove (12), the reset component (5) comprises a blocking spring (51) and a blocking plate (52), the blocking spring (51) is arranged on the blocking plate (52), the blocking spring (51) is arranged on the valve body (1), the blocking spring (51) drives the blocking plate (52) to block the placement groove (12), the blocking plate (52) is provided with a blocking block (521), and the blocking block (521) is located on the moving path of the valve plate (2); when the valve plate (2) blocks the circulation channel (11), the blocking plate (52) does not block the placement groove (12); when the valve plate (2) does not block the circulation channel (11), the blocking plate (52) blocks the placement groove (12).

3. A five-eccentric butterfly valve according to claim 2, characterized in that: The moving bar (132) is provided with a moving inclined surface (133), and the distance between the moving inclined surface (133) and the blocking spring (51) gradually increases along the direction from the moving spring (131) to the moving bar (132), and the moving inclined surface (133) is located in the moving path of the blocking plate (52).

4. A five-eccentric butterfly valve according to claim 2, characterized in that: The reset assembly (5) further comprises a reset spring (53); the valve body (1) is slidably connected to a moving block (13); the moving spring (131) is arranged on the moving block (13); the reset spring (53) is arranged on the moving block (13); and the reset spring (53) drives the moving block (13) to reset.

5. A five-eccentric butterfly valve according to claim 4, characterized in that: The sliding assembly (4) comprises a sliding bar (41), the sliding bar (41) is slidably connected to the valve body (1), the moving bar (132) is located on the moving path of the sliding bar (41), and the sliding bar (41) drives the moving bar (132) to slide.

6. A five-eccentric butterfly valve according to claim 5, characterized in that: The sliding assembly (4) further comprises a limit strip (42), wherein the limit strip (42) is slidably connected to the valve body (1); the operating structure (3) comprises a hand wheel (31) and an operating member (32); the hand wheel (31) is rotatably connected to the valve body (1); the hand wheel (31) drives the valve plate (2) to rotate through the operating member (32); a plurality of through holes (33) are provided on the hand wheel (31), and the limit strip (42) can be inserted into the through holes (33); when the limit strip (42) is located in the through holes (33), the hand wheel (31) cannot rotate, and the moving strip (132) is located in the moving groove (22); when the limit strip (42) is separated from the through holes (33), the hand wheel (31) can rotate, and the moving strip (132) is separated from the moving groove (22), and at this time, the rotating ring (21) rotates.

7. A five-eccentric butterfly valve according to claim 6, characterized in that: The sliding bar (41) is provided with a sliding inclined surface (411), the distance between the sliding inclined surface (411) and the moving bar (132) gradually increases along the insertion direction of the limiting bar (42), and the sliding inclined surface (411) is located in the insertion path of the limiting bar (42).

8. A five-eccentric butterfly valve according to claim 6, characterized in that: A plurality of stop blocks (34) are slidably connected to the hand wheel (31), and a stop hole (421) is provided on the limit bar (42) for the stop block (34) to be inserted into the stop hole (421); when the stop block (34) is inserted into the stop hole (421), the limit bar (42) is fixed at the through hole (33).

9. A five-eccentric butterfly valve according to claim 7, characterized in that: The limiting strip (42) is provided with a first magnet (422), the through hole (33) is provided with a second magnet (35), and the second magnet (35) absorbs the first magnet (422); when the second magnet (35) absorbs the first magnet (422), the limiting strip (42) is located in the through hole (33).

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