A corrosion-resistant butterfly valve

Abstract

The present application discloses a corrosion-resistant butterfly valve, which relates to the technical field of valves, and includes a valve body, the valve body is provided with a water hole for water flow, the valve body is provided with a mounting groove surrounding the water hole at one end facing the pipeline, the valve body is provided with a mounting ring, the mounting ring slides in the mounting groove, the mounting ring is provided with at least three correction columns spaced along the circumferential direction toward the notch of the mounting groove, the correction column is hinged to the mounting ring and can be turned away from the central axis of the mounting ring; a pre-positioning ring for bolts to pass through is provided on the outer circumference of the valve body, the valve body is provided with a driving member that drives the mounting ring toward the notch of the mounting groove when the bolt passes through the pre-positioning ring until the correction column protrudes out of the mounting groove, the valve body is provided with a control member, when the mounting ring moves toward the notch of the mounting groove, the control member controls the correction column to turn until it abuts against the inner wall of the pipeline, and the valve body is provided with a sealing assembly for sealing the gap between the groove wall of the mounting groove and the mounting ring. The present application can improve the installation effect.

Description

Technical Field

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

[0002] A butterfly valve, also known as a flap valve, is a valve whose closing member (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing. It can be used for the on-off control of low-pressure pipeline media.

[0003] At present, the Chinese utility model patent with the announcement number CN2436729Y discloses a pressure-resistant and corrosion-resistant composite butterfly valve, including a valve body, a valve plate, a valve shaft and a handle. The valve body is an integral molded structure, the valve plate and the valve shaft are integrally molded, and the inner and outer surfaces are covered with a glass fiber protective layer. When installing, first place the butterfly valve between two sections of installed pipes, the two sections of the pipe mouth are respectively fixed with flanges, and then the butterfly valve is clamped and fixed between the two ends of the pipe by bolts and nuts.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: it is difficult to observe the specific conditions of the connection between the butterfly valve and the pipeline due to the obstruction of the pipeline during installation, which may cause some deviation between the central axis of the water hole of the butterfly valve and the central axis of the pipeline, making the water hole through which the water supply flow in the middle of the butterfly valve passes not coaxially with the pipeline. At this time, the valve plate may be obstructed when the butterfly valve is opened, affecting the use effect of the butterfly valve. Summary of the invention

[0005] In order to improve the installation effect, the present application provides a corrosion-resistant butterfly valve.

[0006] The present application provides a corrosion-resistant butterfly valve, which adopts the following technical solution:

[0007] A corrosion-resistant butterfly valve, comprising a valve body, the valve body being provided with a water hole for water flow, the valve body being provided with a mounting groove surrounding the water hole at one end facing a pipeline, the valve body being provided with a mounting ring, the mounting ring sliding in the mounting groove, the mounting ring being provided with at least three correction columns spaced along the circumferential direction on one side facing the notch of the mounting groove, the correction columns being hinged to the mounting ring and capable of turning in a direction away from the central axis of the mounting ring;

[0008] A pre-positioning ring for bolts to pass through is arranged on the outer peripheral side of the valve body. The valve body is provided with a driving member for driving the mounting ring toward the notch of the mounting groove until the correction column protrudes from the mounting groove when the bolt passes through the pre-positioning ring. The valve body is provided with a control member. When the mounting ring moves toward the notch of the mounting groove, the control member controls the correction column to flip until it abuts against the inner wall of the pipeline. The valve body is provided with a sealing assembly for sealing the gap between the mounting groove wall and the mounting ring.

[0009] By adopting the above technical solution, when installing the valve body, it is first placed between two installed pipes, and then the position of the valve body is preliminarily limited by the pre-positioning ring, and then the bolt is passed through the pre-positioning ring, so that the driving member drives the installation ring to move toward the notch of the installation groove. At this time, the control member controls the correction column to flip and correct the position of the valve body, so that the water hole and the pipe are in a coaxial state, which is beneficial to improving the installation effect of the valve body, and the impact force generated by the water flow in the pipe on the valve body is more uniform, thereby improving the use effect of the valve body.

[0010] Optionally, the driving member includes a driving column, a driving hole is formed on the inner wall of the pre-positioning ring and penetrates the valve body to the mounting groove, the driving column is slidably connected to the driving hole, and a driving surface is formed on the side of the driving column away from the pre-positioning ring for the mounting ring to slide, and the valve body is provided with an elastic pulling member for driving the mounting ring to slide in a direction away from the notch of the mounting groove. When the correction column slides into the mounting groove, the mounting ring pushes the driving column to abut the inner wall of the pre-positioning ring, and the driving column is formed on the side of the driving column away from the mounting groove and a power surface is formed on the side of the driving column away from the mounting groove for the bolt to slide.

[0011] By adopting the above technical solution, when the bolt passes through the pre-positioning hole, it pushes the driving column to slide, so that the mounting ring slides on the power surface. At this time, the driving column pushes the mounting ring toward the notch of the mounting groove.

[0012] Optionally, the control member is a control rope, which is slidably inserted into the mounting ring. There are multiple control ropes and they correspond one-to-one to the correction columns. One end of the control rope is connected to the side of the correction column away from the central axis of the mounting ring, and the other end is connected to the groove wall on the side of the mounting groove away from the groove opening. The mounting ring is provided with a sealing ring which is sleeved on the outer peripheral side of the control rope.

[0013] By adopting the above technical solution, when the installation ring slides toward the notch of the installation groove, the control rope drives the correction column to flip, which is conducive to making the correction column contact with the inner wall of the pipeline and drive the valve body to correct the position.

[0014] Optionally, the driving column includes an inner column and an outer column, the outer column is provided with a connecting groove for the inner column to slide, the power surface is provided on the inner column, and the driving column is provided with a connecting spring, which is installed in the connecting groove, one end of the connecting spring abuts against the inner column, and the other end abuts against the outer column.

[0015] By adopting the above technical solution, when the valve body is corrected but the bolt has not completely passed through the pre-positioning ring, the bolt continues to be inserted and the inner column slides in the connecting groove, so that the bolt can pass through the pre-positioning ring.

[0016] Optionally, the elastic pulling member is a tension spring, and there are multiple tension springs installed in the installation groove, one end of the tension spring is connected to the side of the installation ring away from the slot, and the other end is connected to the slot wall on the side of the installation slot away from the slot.

[0017] By adopting the above technical solution, the tension of the tension spring is released during use, driving the mounting ring to slide into the mounting groove.

[0018] Optionally, the sealing assembly includes a sealing ring, and the sealing ring is in multiple number and is respectively arranged on the outer circumference and inner circumference of the mounting ring, and the sealing ring is in sliding contact with the wall of the mounting groove.

[0019] By adopting the above technical solution, the sealing ring abuts against the wall of the installation groove, which is conducive to achieving sealing between the installation ring and the installation groove.

[0020] Optionally, the valve body is slidably provided with a plurality of support blocks for pushing the sealing ring toward the wall of the mounting groove, and the mounting ring is provided with a pushing component, and when the mounting ring slides toward the notch of the mounting groove, the pushing component pushes the support block toward the sealing ring.

[0021] By adopting the above technical solution, the sealing ring is pushed to abut against the wall of the installation groove by the support block during use, thereby improving the sealing effect of the sealing ring.

[0022] Optionally, the pushing assembly includes a pushing block and a pushing rope, the mounting ring is provided with a supporting groove, the support block slides in the supporting groove, the mounting ring is provided with a power block sliding in the supporting groove, the mounting ring is provided with a pushing groove extending in a direction parallel to the direction of the central axis, the pushing groove is connected with the supporting groove, a supporting spring for pushing the power block into the pushing groove is provided between the pushing block and the support block, the pushing block slides in the pushing groove and is located on a side of the power block close to the notch of the mounting groove, the pushing rope is slidably passed through the pushing groove, one end of the pushing rope is connected to the pushing block, and the other end is connected to a groove wall on a side of the mounting groove away from the notch, the pushing block is inclinedly provided with a pushing surface, and the power block is inclinedly provided with a guide surface to guide the power block to slide on the pushing surface.

[0023] By adopting the above technical solution, when the mounting ring slides, the pushing rope pulls the pushing block, so that the guide surface slides on the pushing surface, pushing the power block toward the sealing ring. At this time, the supporting spring transmits power to push the supporting block to slide, so that the supporting block pushes the sealing ring to abut against the wall of the mounting groove.

[0024] Optionally, the mounting ring is provided with a torsion spring for driving the correction column to flip toward a direction close to the central axis.

[0025] By adopting the above technical solution, the torsion spring is elastically released during use, pushing the correction column to flip, so that the correction column can remain close to the central axis of the installation ring, making it easier to insert the correction column into the pipeline.

[0026] In summary, the present application includes at least one of the following beneficial effects:

[0027] 1. During installation, the position of the valve body is initially defined by the pre-positioning ring, and then the position of the valve body is corrected by the correction column against the inner wall of the pipe to improve the installation effect of the valve body;

[0028] 2. When in use, push the sealing ring against the wall of the installation groove through the support block to improve the sealing effect of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This embodiment of the present application reflects the structural intention of the valve body after installation;

[0030] Figure 2 is a cross-sectional schematic diagram of an embodiment of the present application after the valve body is installed;

[0031] Figure 3 yes Figure 2 A magnified schematic diagram of part A;

[0032] Figure 4 yes Figure 2 An enlarged schematic diagram of part B.

[0033] : Illustrations: 1. valve body; 11. water hole; 12. installation groove; 13. pre-positioning ring; 14. drive hole; 15. tension spring; 16. support groove; 17. push groove; 2. installation ring; 21. correction column; 22. sealing ring; 23. hinge shaft; 24. torsion spring; 3. sealing ring; 31. support block; 4. drive column; 41. inner column; 411. drive surface; 42. outer column; 421. power surface; 422. connecting groove; 43. connecting spring; 5. control rope; 6. push assembly; 61. push rope; 62. push block; 621. push surface; 63. power block; 631. guide surface; 64. support spring. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-4 This application is described in further detail.

[0035] The present application discloses a corrosion-resistant butterfly valve. Figure 1 and Figure 2 The corrosion-resistant butterfly valve includes a valve body 1, which is installed between two sections of fixed pipes. A flange is fixed at the end of the pipe. The two pipes are connected and fixed by bolts and nuts, and the valve body 1 is clamped between the two pipes. A water hole 11 is opened in the middle of the valve body 1. The diameter of the water hole 11 is smaller than the inner diameter of the pipe. When the valve body 1 is opened, water flows through the water hole 11, so that the water flow is connected between the two pipes. When the valve body 1 is closed, the water flow connection between the two pipes is terminated. The valve body 1 of the present application is mainly connected between two pipes where the water flow velocity is in a low-speed state.

[0036] See also Figure 2 and Figure 3The valve body 1 is provided with a mounting groove 12 surrounding the water hole 11 at one end thereof facing the pipeline, and the central axis of the mounting groove 12 coincides with the central axis of the water hole 11. The valve body 1 is provided with a mounting ring 2 of an annular structure, and the mounting ring 2 is slidably connected to the mounting groove 12, and the mounting ring 2 can approach or move away from the notch of the mounting groove 12.

[0037] See also Figure 3 , a receiving groove is provided on one side of the mounting ring 2 facing the notch of the mounting groove 12, and there are at least three receiving grooves and they are evenly spaced along the circumferential direction. The embodiment of the present application has three receiving grooves. The mounting ring 2 is fixedly connected to a hinge shaft 23 located in the receiving groove, and there are multiple hinge shafts 23 and they correspond one to one to the receiving grooves. The hinge shaft 23 is rotatably connected to a correction column 21, and the correction column 21 can flip toward or away from the central axis of the mounting ring 2. A torsion spring 24 is sleeved on the outer peripheral side of the hinge shaft 23, and one end of the torsion spring 24 abuts against the side wall of the correction column 21 away from the central axis of the mounting ring 2, and the other end abuts against the wall of the receiving groove. When in use, the torsion spring 24 is elastically released to push the correction column 21 to flip toward the central axis of the mounting ring 2.

[0038] See also Figure 2 and Figure 3 The mounting ring 2 is provided with an elastic pulling member, which is a tension spring 15. There are multiple tension springs 15 and they are installed in the mounting groove 12. One end of the tension spring 15 is fixed to the side of the mounting ring 2 away from the notch of the mounting groove 12, and the other end is fixed to the groove wall of the mounting groove 12 away from the notch. When in use, the tension spring 15 is elastically released, pulling the mounting ring 2 to slide in the direction away from the notch of the mounting groove 12, so that the correction column 21 can slide into the mounting groove 12, which is convenient for the installation of the valve body 1.

[0039] See also Figure 2 and Figure 3 The outer circumference of the valve body 1 is fixedly connected with a plurality of pre-positioning rings 13. The position of the pre-positioning rings 13 is adapted to the bolts between the two pipes, and the inner diameter of the pre-positioning rings 13 is relatively large, so that the pre-positioning rings 13 can adapt to bolts of different diameters. When the valve body 1 is installed, the bolts pass through the middle of the pre-positioning rings 13 to preliminarily correct the position of the valve body 1.

[0040] See also Figure 2 and Figure 3 The valve body 1 is provided with a driving assembly. When the bolt passes through the middle of the pre-positioning ring 13, the driving assembly drives the mounting ring 2 to slide toward the notch of the mounting groove 12, so that the correction column 21 can protrude out of the mounting groove 12. At this time, the correction column 21 is inserted into the pipeline.

[0041] See also Figure 3The driving member includes a driving column 4. A driving hole 14 penetrating and connected to the mounting groove 12 is provided on the inner wall of the pre-positioning ring 13. The extension direction of the driving hole 14 is perpendicular to the central axis of the mounting ring 2. The driving column 4 slides in the driving hole 14. A power surface 421 is obliquely provided on the side of the driving column 4 away from the pre-positioning ring 13. The driving column 4 is a long square columnar structure, so that the power surface 421 can remain facing the mounting ring 2. In the initial state, the tension spring 15 pulls the mounting ring 2 to slide until the correction column 21 slides into the mounting groove 12. At this time, the mounting ring 2 slides on the power surface 421, pushing the driving column 4 toward the pre-positioning ring 13 until the end of the driving column 4 away from the mounting groove 12 abuts against the inner wall of the pre-positioning ring 13. A driving surface 411 is inclined on the side of the driving column 4 away from the mounting groove 12. When the bolt passes through the pre-positioning ring 13, the bolt slides on the driving surface 411 to push the driving column 4 toward the mounting groove 12. At this time, the mounting ring 2 slides on the power surface 421, so that the driving column 4 pushes the mounting ring 2 toward the notch of the mounting groove 12.

[0042] See also Figure 2 and Figure 3 The valve body 1 is provided with a control member. When the mounting ring 2 slides toward the notch of the mounting groove 12, the control member controls the correction column 21 to flip in the direction away from the central axis of the mounting ring 2, so that the correction column 21 abuts against the inner wall of the pipe, and the position of the valve body 1 is corrected, which is conducive to the water hole 11 and the pipe being in a coaxial state. At this time, when the water in one pipe flows to the other pipe, the impact force on the valve body 1 is in a relatively uniform state.

[0043] See also Figure 3 The control part is a control rope 5. There are multiple control ropes 5 and they correspond to the correction columns 21 one by one. When installing, the control rope 5 is slidably inserted into the installation ring 2. One end of the control rope 5 is fixed to the side of the correction column 21 away from the central axis of the installation ring 2, and the other end is fixed to the groove wall of the installation groove 12 away from the groove. When the installation ring 2 slides toward the groove of the installation groove 12, the control rope 5 pulls the correction column 21, so that the correction column 21 slides toward the inner wall of the pipe. A sealing ring 22 is embedded and fixed in the installation ring 2. The sealing ring 22 is slidably sleeved on the outer peripheral side of the control rope 5 to achieve sealing between the installation ring 2 and the control rope 5.

[0044] See also Figure 3 The driving column 4 includes an inner column 41 and an outer column 42. A connecting groove 422 is provided at one end of the outer column 42. The inner column 41 slides in the connecting groove 422 along the length direction. The power surface 421 is provided in the inner column 41. The driving column 4 is provided with a connecting spring 43. The connecting spring 43 is installed in the connecting groove 422. One end of the connecting spring 43 abuts against the inner column 41, and the other end abuts against the groove wall of the connecting groove 422. When the correction column 21 abuts against the inner wall of the pipeline so that the correction of the valve body 1 is completed and the bolt has not passed through the pre-positioning ring 13, the inner column 41 can slide in the connecting groove 422, so that the bolt can continue to pass through the pre-positioning ring 13.

[0045] See also Figure 2 and Figure 3 The valve body 1 is provided with a sealing assembly, which reduces the possibility of water flowing through the installation ring 2 and the groove wall of the installation groove 12 during use. The sealing assembly includes a sealing ring 3. The outer circumference and the inner circumference of the installation ring 2 are respectively provided with an annular sealing groove. The sealing ring 3 corresponds to the sealing groove one by one and is inserted into the sealing groove. When the installation ring 2 slides, the sealing ring 3 slides and contacts with the groove wall of the installation groove 12, so as to achieve sealing between the groove wall of the installation groove 12 of the installation ring 2.

[0046] See also Figure 3 and Figure 4 A plurality of support grooves 16 are provided at intervals along the circumferential direction on the groove wall of the sealing groove close to the central axis of the mounting ring 2. The mounting ring 2 is provided with a support block 31, which slides in the support groove 16 and can approach or move away from the sealing ring 3. The mounting ring 2 is provided with a pushing component 6. When the mounting ring 2 slides toward the notch of the mounting groove 12, the pushing component 6 pushes the support block 31 close to the sealing ring 3 until the sealing ring 3 is driven to abut against the groove wall of the mounting groove 12, thereby further improving the sealing degree between the sealing ring 3 and the groove wall of the mounting groove 12.

[0047] See also Figure 3 and Figure 4 The mounting ring 2 is provided with a power block 63, which slides in the support groove 16 and is located on the side of the support block 31 away from the sealing ring 3. The mounting ring 2 is provided with a support spring 64, which is installed in the support groove 16, one end of the support spring 64 abuts against the support block 31, and the other end abuts against the power block 63. The pushing assembly 6 includes a pushing block 62 and a pushing rope 61. The mounting ring 2 is provided with a pushing groove 17 which is connected with the support groove 16 and penetrates to the outside of the mounting ring 2 in a direction away from the notch of the mounting groove 12. The pushing block 62 slides in the pushing groove 17 and is located on the side of the power block 63 close to the notch of the mounting groove 12. The pushing block 62 is inclined to open a pushing surface 621 facing the power block 63, and the power block 63 is inclined to open a guide surface 631 facing the pushing block 62, and the guide surface 631 corresponds to the pushing surface 621. The push rope 61 slides in the push groove 17, one end of the push rope 61 is fixed to the side of the power block 63 away from the notch of the installation groove 12, and the other end is fixed to the groove wall of the installation groove 12 away from the notch. When the mounting ring 2 slides toward the notch of the installation groove 12, the push rope 61 pulls the push block 62 to slide toward the notch of the push groove 17. At this time, the guide surface 631 slides on the push surface 621, so that the push block 62 pushes the power block 63 toward the sealing ring 3, so that the connecting spring 43 transmits power to push the support block 31 to squeeze the sealing ring 3, thereby improving the tightness between the sealing ring 3 and the groove wall of the installation groove 12.

[0048] The implementation principle of a corrosion-resistant butterfly valve in the embodiment of the present application is:

[0049] During installation, the valve body 1 is placed between two already installed pipes, and then the position of the valve body 1 is preliminarily defined by the pre-positioning ring 13. Then, bolts are inserted to connect the two pipes. When the bolts pass through the pre-positioning ring 13, the installation ring 2 slides toward the notch of the installation groove 12 to drive the correction column 21 to protrude from the installation groove 12. At the same time, the control rope 5 drives the correction column 21 to flip until it hits the inner wall of the pipe, and the position of the valve body 1 is adjusted. At this time, when the water flows from one pipe to another, the impact force on the valve body 1 is in a relatively uniform state, and when the installation ring 2 slides, the support block 31 pushes the sealing ring 3, so that the tightness between the sealing ring 3 and the wall of the installation groove 12 is improved, reducing the possibility of water leakage. The whole process is simple, and the water hole 11 can be coaxial with the pipe when the installation field of view is affected, which is conducive to improving the installation effect of the valve body 1.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A corrosion-resistant butterfly valve, characterized in that: The valve body (1) comprises a valve body (1), the valve body (1) being provided with a water hole (11) for water to flow through, the valve body (1) being provided with a mounting groove (12) surrounding the water hole (11) at one end facing the pipeline, the valve body (1) being provided with a mounting ring (2), the mounting ring (2) sliding in the mounting groove (12), the mounting ring (2) being provided with at least three correction columns (21) spaced along the circumferential direction on one side of the notch of the mounting groove (12), the correction columns (21) being hinged to the mounting ring (2) and being capable of turning in a direction away from the central axis of the mounting ring (2); The outer peripheral side of the valve body (1) is provided with a pre-positioning ring (13) for allowing a bolt to pass through, the valve body (1) is provided with a driving member for driving the mounting ring (2) toward the notch of the mounting groove (12) until the correction column (21) protrudes out of the mounting groove (12) when the bolt passes through the pre-positioning ring (13), the valve body (1) is provided with a control member, when the mounting ring (2) moves toward the notch of the mounting groove (12), the control member controls the correction column (21) to flip until it abuts against the inner wall of the pipeline, and the valve body (1) is provided with a sealing component for sealing the gap between the groove wall of the mounting groove (12) and the mounting ring (2); The driving member comprises a driving column (4); a driving hole (14) penetrating the valve body (1) to the mounting groove (12) is formed on the inner wall of the pre-positioning ring (13); the driving column (4) is slidably connected to the driving hole (14); a driving surface (411) for the mounting ring (2) to slide is formed obliquely on the side of the driving column (4) away from the pre-positioning ring (13); the valve body (1) is provided with an elastic pulling member for driving the mounting ring (2) to slide in a direction away from the notch of the mounting groove (12); when the correction column (21) slides into the mounting groove (12), the mounting ring (2) pushes the driving column (4) to abut against the inner wall of the pre-positioning ring (13); and a power surface (421) for the bolt to slide is formed obliquely on the side of the driving column (4) away from the mounting groove (12); The control member is a control rope (5), the control rope (5) is slidably inserted into the mounting ring (2), there are a plurality of control ropes (5) and they correspond one to one with the correction columns (21), one end of the control rope (5) is connected to the side of the correction column (21) away from the central axis of the mounting ring (2), and the other end is connected to the groove wall of the mounting groove (12) away from the groove opening, and the mounting ring (2) is provided with a sealing ring (22) sleeved on the outer peripheral side of the control rope (5).

2. A corrosion-resistant butterfly valve according to claim 1, characterized in that: The driving column (4) comprises an inner column (41) and an outer column (42); the outer column (42) is provided with a connecting groove (422) for the inner column (41) to slide; the power surface (421) is provided on the inner column (41); the driving column (4) is provided with a connecting spring (43); the connecting spring (43) is installed in the connecting groove (422); one end of the connecting spring (43) abuts against the inner column (41) and the other end abuts against the outer column (42).

3. The corrosion-resistant butterfly valve according to claim 1, characterized in that: The elastic pulling member is a tension spring (15), a plurality of tension springs (15) are provided and installed in the installation groove (12), one end of the tension spring (15) is connected to the side of the installation ring (2) away from the groove, and the other end is connected to the groove wall of the installation groove (12) away from the groove.

4. The corrosion-resistant butterfly valve according to claim 1, characterized in that: The sealing assembly comprises a sealing ring (3), wherein a plurality of the sealing rings (3) are respectively arranged on the outer peripheral side and the inner peripheral side of the mounting ring (2), and the sealing rings (3) are in sliding contact with the groove wall of the mounting groove (12).

5. The corrosion-resistant butterfly valve according to claim 4, characterized in that: The valve body (1) is slidably provided with a plurality of support blocks (31) for pushing the sealing ring (3) in the direction of the groove wall of the installation groove (12), and the installation ring (2) is provided with a pushing component (6), and when the installation ring (2) slides in the direction of the groove opening of the installation groove (12), the pushing component (6) pushes the support blocks (31) in the direction of the sealing ring (3).

6. The corrosion-resistant butterfly valve according to claim 5, characterized in that: The pushing assembly (6) comprises a pushing block (62) and a pushing rope (61); the mounting ring (2) is provided with a supporting groove (16); the supporting block (31) slides in the supporting groove (16); the mounting ring (2) is provided with a power block (63) that slides in the supporting groove (16); the mounting ring (2) is provided with a pushing groove (17) whose extending direction is parallel to the central axis direction; the pushing groove (17) is connected to the supporting groove (16); a pushing power block (63) is inserted into the pushing groove (17) between the pushing block (62) and the supporting block (31); 7), the pushing block (62) slides in the pushing groove (17) and is located on the side of the power block (63) close to the slot opening of the installation groove (12), the pushing rope (61) is slidably arranged in the pushing groove (17), one end of the pushing rope (61) is connected to the pushing block (62), and the other end is connected to the slot wall of the installation groove (12) away from the slot opening, the pushing block (62) is inclined to open a pushing surface (621), and the power block (63) is inclined to open a guiding surface (631) for guiding the power block (63) to slide on the pushing surface (621).

7. The corrosion-resistant butterfly valve according to claim 1, characterized in that: The mounting ring (2) is provided with a torsion spring (24) for driving the correction column (21) to flip towards a direction close to the central axis.

Images