Butterfly valve with good sealing performance

Abstract

The utility model relates to the technical field of butterfly valves, and discloses a butterfly valve with good sealing performance, which comprises a main body assembly, a valve body, a valve plate and a rotating shaft, the valve plate is arranged in the valve body, and the rotating shaft is positioned on one side of the valve body; the sealing assembly is arranged on one side of the valve body and comprises a sealing piece, the sealing piece is arranged on one side of the valve plate and comprises a sealing ring, an extrusion plate, a moving column, a sleeve, a first belt wheel and a second belt wheel, and the sealing ring is located in the valve body. The utility model has the beneficial effects that through the design of the sealing assembly, the contact part of the sealing ring and the valve plate is extruded in a small range when the valve plate is closed, so that the sealing ring is more tightly attached to the valve plate, the medium leakage is effectively prevented, a good sealing effect is kept, and the operation stability and safety of a system are improved; the sealing assembly can automatically relieve extrusion, normal movement of the valve plate cannot be affected, and the operation flexibility of the butterfly valve is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a butterfly valve with good sealing performance. Background Art

[0002] The valve disc of a butterfly valve is a disc-shaped component that is connected to the drive unit via the valve stem. When the drive unit rotates the valve stem, the valve disc also rotates. The angle of rotation of the valve disc determines the opening of the butterfly valve, thereby controlling the flow of the medium. Butterfly valves usually rely on simple contact between the valve disc and the sealing ring to achieve sealing. If the seal is insufficient, it will cause leakage of the medium, affecting the normal operation of the system, and may also cause environmental pollution and even cause safety accidents. The existing butterfly valve sealing structure is relatively simple in design and lacks effective sealing enhancement measures. When the valve disc is closed, the contact between the sealing ring and the valve disc may not be tight enough to completely block the penetration of the medium. When the valve disc is open, the valve disc may not move smoothly due to the limitations of the sealing structure, affecting the operating performance of the butterfly valve. Utility Model Content

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0004] In view of the above problems and / or the problems existing in existing butterfly valves with good sealing performance, the present utility model is proposed.

[0005] Therefore, the problem to be solved by the present invention is that the butterfly valve lacks sealing enhancement measures.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a butterfly valve with good sealing performance, comprising a main body assembly, including a valve body, a valve plate and a rotating shaft, wherein the valve plate is arranged in the valve body, and the rotating shaft is located on one side of the valve body;

[0007] a sealing assembly, disposed on one side of the valve body, comprising a sealing member, disposed on one side of the valve plate, comprising a sealing ring, an extrusion plate, a movable column, a sleeve, a first pulley, and a second pulley, wherein the sealing ring is located in the valve body, the valve body is provided with a movable groove, the extrusion plate slides in the movable groove, the movable column is fixed to one end of the extrusion plate, the sleeve is sleeved on the outside of the movable column, the first pulley is sleeved on the outside of the sleeve, and the second pulley is sleeved on the rotating shaft;

[0008] The sealing assembly also includes an auxiliary part, which is located on one side of the rotating shaft, including a latch, a moving block, a clamping block, an annular plate, a threaded column, a gear and a tooth block. The latch is arranged on one side of the rotating shaft, the rotating shaft is provided with a sliding groove, the moving block slides in the sliding groove, and the latch is fixed to the moving block, the clamping block is fixed to one side of the latch, the annular plate is sleeved on the outside of the rotating shaft, the annular plate is provided with an annular groove, the clamping block slides in the annular groove, the annular plate is provided with a threaded groove, the threaded column is inserted in the threaded groove, the gear is sleeved outside the threaded column, and the tooth block is fixed to the outside of the rotating shaft.

[0009] As a preferred solution of the butterfly valve with good sealing performance of the utility model, a slot is provided in the second pulley, and the latch can be engaged with the slot.

[0010] As a preferred solution of the butterfly valve with good sealing performance described in the present invention, a sliding groove is provided in the first pulley, a locking block is provided in the sliding groove, and one end of the locking block is triangular.

[0011] As a preferred solution of the butterfly valve with good sealing performance of the utility model, a spring is fixed to one end of the locking block, and the other end of the spring is fixed to the inner wall of the sliding groove.

[0012] As a preferred solution of the butterfly valve with good sealing performance of the utility model, a locking groove is provided in the sleeve, and the locking block can be engaged with the locking groove.

[0013] As a preferred solution of the butterfly valve with good sealing performance of the utility model, the outer shells of the first pulley and the second pulley are provided with belts.

[0014] As a preferred solution of the butterfly valve with good sealing performance of the utility model, the sleeve is connected to the valve body through a bearing.

[0015] As a preferred solution of the butterfly valve with good sealing performance of the utility model, the second pulley is connected to the rotating shaft bearing.

[0016] As a preferred solution of the butterfly valve with good sealing performance of the utility model, the threaded column is connected to the valve body through a bearing.

[0017] As a preferred solution of the butterfly valve with good sealing performance described in the present invention, the main body component further includes a handwheel and a reduction mechanism, the handwheel is fixed to one side of the rotating shaft, and the reduction mechanism is arranged on the top of the valve body.

[0018] The beneficial effects of the utility model are as follows: by designing the sealing component, the contact area between the sealing ring and the valve plate is squeezed in a small range when the valve plate is closed, so that the sealing ring fits the valve plate more closely, effectively preventing medium leakage, maintaining a good sealing effect, and improving the operating stability and safety of the system; when the valve plate is opened, the sealing component can automatically release the squeezing without affecting the normal movement of the valve plate, thereby ensuring the operational flexibility of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0020] Figure 1 This is the overall structure diagram of a butterfly valve with good sealing performance.

[0021] Figure 2 For butterfly valves with good sealing performance Figure 1 A partial enlarged structural diagram of point A in the middle.

[0022] Figure 3 For butterfly valves with good sealing performance Figure 1 A partial enlarged structural diagram of point B in the middle.

[0023] Figure 4 This is a cross-sectional structure diagram of the valve body of a butterfly valve with good sealing performance.

[0024] Figure 5 This is the locking block structure diagram of a butterfly valve with good sealing performance.

[0025] Figure 6 This is the structural diagram of the auxiliary parts of a butterfly valve with good sealing performance.

[0026] Figure 7 This is a cross-sectional diagram of the annular plate of a butterfly valve with good sealing performance. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0030] Example 1

[0031] Reference Figure 1-Figure 7 , which is the first embodiment of the present utility model, provides a butterfly valve with good sealing performance. The butterfly valve with good sealing performance includes a main body assembly 100, including a valve body 101, a valve plate 102 and a rotating shaft 103. The valve plate 102 is arranged in the valve body 101, and the rotating shaft 103 is located on one side of the valve body 101.

[0032] The valve body 101 is the main part of the butterfly valve, providing a channel for the flow of medium. The valve plate 102 is the core component of the butterfly valve, used to control the flow of medium. The rotating shaft 103 is used to transmit power and control the rotation of the valve plate 102.

[0033] The sealing assembly 200 is arranged on one side of the valve body 101, including a sealing member 201, which is arranged on one side of the valve plate 102, including a sealing ring 201a, an extrusion plate 201b, a movable column 201c, a sleeve 201d, a first pulley 201e and a second pulley 201f. The sealing ring 201a is located in the valve body 101, the valve body 101 is provided with a movable groove 101-1, the extrusion plate 201b slides in the movable groove 101-1, the movable column 201c is fixed to one end of the extrusion plate 201b, the sleeve 201d is sleeved on the outside of the movable column 201c, the first pulley 201e is sleeved on the outside of the sleeve 201d, and the second pulley 201f is sleeved on the rotating shaft 103.

[0034] There are two groups of seals 201, which are symmetrically distributed on both sides of the valve body 101. They are used to squeeze the contact area between the sealing ring 201a and the valve plate 102 in a small range to improve the sealing performance of the butterfly valve. The rotation of the shaft 103 will drive the two groups of seals 201 to move simultaneously.

[0035] The sealing ring 201a is made of rubber, which has good sealing performance and low friction. The extrusion plate 201b is arc-shaped and is used to push the sealing ring 201a to fit tighter with the valve plate 102. The setting of the sleeve 201d supports the first pulley 201e.

[0036] A thread is provided on the outer side of one end of the movable column 201c, and a corresponding thread groove is provided in the sleeve 201d. Through the cooperation of the two, the sleeve 201d rotates to drive the movable column 201c to move in the horizontal direction.

[0037] When the rotating shaft 103 rotates, it will drive the second pulley 201f to rotate, and drive the first pulley 201e to rotate, and then drive the sleeve 201d to rotate. At this time, the movable column 201c will move horizontally toward the valve plate 102, thereby driving the extrusion plate 201b to move along the movable groove 101-1 toward the valve plate 102 and squeeze it, thereby improving the sealing performance of the butterfly valve when it is closed.

[0038] The sealing assembly 200 further includes an auxiliary component 202, which is located on one side of the rotating shaft 103 and includes a latch 202a, a moving block 202b, a clamping block 202c, an annular plate 202d, a threaded column 202e, a gear 202f, and a tooth block 202g. The latch 202a is disposed on one side of the rotating shaft 103, which has a sliding groove 103-1. The moving block 202b slides in the sliding groove 103-1, and the latch 202a is fixed to the moving block 202b. The clamping block 202c is fixed to one side of the pin 202a, the annular plate 202d is sleeved on the outside of the rotating shaft 103, the annular plate 202d is provided with an annular groove 202d-1, the clamping block 202c slides in the annular groove 202d-1, the annular plate 202d is provided with a threaded groove 202d-2, the threaded column 202e is inserted into the threaded groove 202d-2, the gear 202f is sleeved on the outside of the threaded column 202e, and the gear block 202g is fixed to the outside of the rotating shaft 103.

[0039] There are two groups of auxiliary parts 202, corresponding to two groups of seals 201 respectively. The auxiliary parts 202 are set to provide transmission for the seals 201 and the opening of the valve plate 102, so that when the valve plate 102 is closed, the sealing ring 201a fits the valve plate 102 more closely, and when the valve plate 102 is opened, the seal 201 can automatically release the squeeze and will not affect the normal movement of the valve plate 102, thereby ensuring the operational flexibility of the butterfly valve.

[0040] The slide groove 103-1 is T-shaped to ensure that the moving block 202b drives the pin 202a to slide smoothly. The blocking block 202c is used to connect the annular plate 202d and the pin 202a. The setting of the annular plate 202d and the threaded column 202e is used to drive the pin 202a to move horizontally, and drive the threaded column 202e to rotate through the engagement of the gear 202f and the tooth block 202g.

[0041] The width of the tooth block 202g is one-third of the shaft 103. When the shaft 103 rotates, it will drive the gear 202f to rotate slowly, and then slowly drive the annular plate 202d to move, so that the pin 202a will move a small amount toward the second pulley 201f after the shaft 103 rotates multiple times.

[0042] When the rotating shaft 103 rotates, it drives the tooth block 202g to rotate, and through the engagement of the gear 202f and the tooth block 202g, the threaded column 202e rotates. With the cooperation of the threaded column 202e and the threaded groove 202d-2, the annular plate 202d is driven to move horizontally. The annular plate 202d will drive the block 202c and the pin 202a to move toward the second pulley 201f. At the same time, the block 202c will slide in the annular groove 202d-1 to avoid interfering with the rotation of the rotating shaft 103.

[0043] There is a large friction force between the annular plate 202d and the threaded column 202e, so that after the gear 202f and the tooth block 202g are separated, the friction force between the annular plate 202d and the threaded column 202e can limit the threaded column 202e to prevent the threaded column 202e from rotating on its own, so that the tooth block 202g can engage with the gear 202f again as the rotating shaft 103 rotates, thereby driving the threaded column 202e again.

[0044] Example 2

[0045] Reference Figure 1-Figure 7 , which is the second embodiment of the present utility model, and this embodiment is based on the previous embodiment.

[0046] Specifically, a slot 201f-1 is defined in the second pulley 201f, and the latch 202a can be engaged with the slot 201f-1.

[0047] There are multiple slots 201f-1. Through the cooperation between the slots 201f-1 and the pin 202a, when the two are engaged, the rotation of the rotating shaft 103 will drive the second pulley 201f to rotate, providing power for the seal 201. When the two are separated, the rotating shaft 103 will not drive the second pulley 201f to rotate, thereby ensuring that the rotating shaft 103 drives the valve plate 102 to close. When the valve plate 102 is about to be in a closed state, the pin 202a will engage with the slot 201f-1, providing power for the seal 201, and causing the extrusion plate 201b to squeeze the sealing ring 201a, thereby improving the sealing performance of the butterfly valve.

[0048] Specifically, a sliding groove 201e-1 is defined in the first pulley 201e, a locking block 201g is disposed in the sliding groove 201e-1, and one end of the locking block 201g is triangular.

[0049] The triangular arrangement ensures that the locking block 201g does not affect the clockwise or counterclockwise rotation of the first pulley 201e.

[0050] Specifically, a spring 201h is fixed to one end of the locking block 201g, and the other end of the spring 201h is fixed to the inner wall of the sliding groove 201e-1.

[0051] The spring 201h is used to provide a continuous pushing force to the locking block 201g and prevent the position of the locking block 201g from being shifted.

[0052] Specifically, a locking groove 201d-1 is defined in the sleeve 201d, and the locking block 201g can be engaged with the locking groove 201d-1.

[0053] The shape of the locking groove 201d-1 is a corresponding triangle to the locking block 201g. When the first pulley 201e rotates, the locking block 201g engages with the locking groove 201d-1, and the first pulley 201e will drive the sleeve 201d to rotate, thereby driving the extrusion plate 201b to slide in the movable groove 101-1. When the extrusion plate 201b moves to the end face of the movable groove 101-1, the movable groove 101-1 will limit the movement of the extrusion plate 201b, and then limit the movement of the movable column 201c, so that the sleeve 201d will no longer rotate. At this time, the first pulley 201e will continue to rotate, and the inner wall of the locking groove 201d-1 will squeeze the locking block 201g, compressing the spring 201h, and the locking block 201g is separated from the locking groove 201d-1, thereby ensuring that after the extrusion plate 201b cannot move, it will not affect the rotation of the first pulley 201e.

[0054] Specifically, the first pulley 201e and the second pulley 201f are covered with a belt 201i.

[0055] The belt 201i is configured to enable the rotation of the second pulley 201f to drive the first pulley 201e to rotate.

[0056] Example 3

[0057] Reference Figure 1-Figure 7 , which is the third embodiment of the present utility model, and is based on the first two embodiments.

[0058] Specifically, the sleeve 201d is connected to the valve body 101 through a bearing.

[0059] The bearing is used to support and position the sleeve 201d, ensuring that the sleeve 201d can rotate normally.

[0060] Specifically, the second pulley 201f is connected to the rotating shaft 103 by a bearing.

[0061] The second pulley 201f is supported and positioned using a bearing connection, thereby reducing friction during the rotation of the second pulley 201f and extending its service life.

[0062] Specifically, the threaded column 202e is connected to the valve body 101 through a bearing.

[0063] The threaded column 202e is supported and positioned by the bearing to ensure the stability of the threaded column 202e during rotation.

[0064] Specifically, the main assembly 100 further includes a handwheel 104 and a speed reduction mechanism 105 . The handwheel 104 is fixed to one side of the rotating shaft 103 , and the speed reduction mechanism 105 is disposed on the top of the valve body 101 .

[0065] The handwheel 104 is used to drive the rotating shaft 103 to rotate, and the deceleration mechanism 105 can slow down the opening and closing speed of the butterfly valve, making the movement of the valve plate more stable. At the same time, by reducing the operating torque, the operator can operate the valve more easily. This is the existing technology, and this solution will not be elaborated on, and those skilled in the art can clearly understand the working principle.

[0066] During use, when the valve plate 102 needs to be closed, the handwheel 104 is rotated to drive the rotating shaft 103 to rotate. At this time, the valve plate 102 begins to close. At the same time, the rotating shaft 103 drives the tooth block 202g to rotate, and drives the gear 202f to rotate, and then drives the threaded column 202e to rotate, so that the annular plate 202d moves horizontally along the threaded column 202e, and the annular plate 202d will drive the pin 202a to move slowly toward the slot 201f-1.

[0067] When the valve plate 102 is about to be in a closed state, the slot 201f-1 engages with the pin 202a, and the rotation of the rotating shaft 103 will drive the second pulley 201f to rotate, and then the first pulley 201e to rotate, and the first pulley 201e will drive the sleeve 201d to rotate, and the movable column 201c is threadedly connected to the sleeve 201d, so that the movable column 201c drives the extrusion plate 201b to move along the movable groove 101-1 and squeeze the sealing ring 201a, thereby improving the sealing performance of the butterfly valve when it is in a closed state.

[0068] When the extrusion plate 201b moves to the end face of the movable groove 101-1, the movable groove 101-1 will limit the movement of the extrusion plate 201b, and then limit the movement of the movable column 201c, so that the sleeve 201d will no longer rotate. At this time, the first pulley 201e will continue to rotate, and the inner wall of the locking groove 201d-1 will squeeze the locking block 201g, compressing the spring 201h, and the locking block 201g is separated from the locking groove 201d-1, thereby ensuring that after the extrusion plate 201b cannot move, it will not affect the rotation of the first pulley 201e.

[0069] When the valve plate 102 needs to be opened, the hand wheel 104 is rotated in the reverse direction, and the second pulley 201f is driven to rotate at the same time, and then the first pulley 201e is driven to rotate in the reverse direction, so that the extrusion plate 201b is moved away from the sealing ring 201a, and the extrusion is released, which will not affect the normal movement of the valve plate, thereby ensuring the operational flexibility of the butterfly valve. As the hand wheel 104 rotates in the reverse direction, the pin 202a will slowly move away from the slot 201f-1 and return to the initial position, so as to facilitate the next closing of the valve plate 102.

[0070] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A butterfly valve with good sealing performance, characterized by: include, A main body assembly (100) comprises a valve body (101), a valve plate (102), and a rotating shaft (103), wherein the valve plate (102) is arranged in the valve body (101), and the rotating shaft (103) is located on one side of the valve body (101); A sealing assembly (200) is arranged on one side of the valve body (101), comprising a sealing member (201), which is arranged on one side of the valve plate (102), comprising a sealing ring (201a), an extrusion plate (201b), a movable column (201c), a sleeve (201d), a first pulley (201e) and a second pulley (201f), wherein the sealing ring (201a) is located in the valve body (101), the valve body (101) is provided with a movable groove (101-1), the extrusion plate (201b) slides in the movable groove (101-1), the movable column (201c) is fixed to one end of the extrusion plate (201b), the sleeve (201d) is sleeved on the outside of the movable column (201c), the first pulley (201e) is sleeved on the outside of the sleeve (201d), and the second pulley (201f) is sleeved on the rotating shaft (103); The sealing assembly (200) further includes an auxiliary component (202), which is located on one side of the rotating shaft (103) and includes a latch (202a), a moving block (202b), a clamping block (202c), an annular plate (202d), a threaded column (202e), a gear (202f) and a tooth block (202g). The latch (202a) is arranged on one side of the rotating shaft (103). The rotating shaft (103) is provided with a sliding groove (103-1). The moving block (202b) slides in the sliding groove (103-1). The latch (202a) is fixed to the moving block (202b). The clamping block (202c) is provided with a threaded column (202e). The block (202c) is fixed to one side of the latch (202a), the annular plate (202d) is sleeved on the outside of the rotating shaft (103), the annular plate (202d) is provided with an annular groove (202d-1), the clamping block (202c) slides in the annular groove (202d-1), the annular plate (202d) is provided with a thread groove (202d-2), the threaded column (202e) is inserted into the threaded groove (202d-2), the gear (202f) is sleeved on the outside of the threaded column (202e), and the tooth block (202g) is fixed to the outside of the rotating shaft (103).

2. The butterfly valve with good sealing performance according to claim 1, characterized in that: A slot (201f-1) is provided in the second pulley (201f), and the latch (202a) can be engaged with the slot (201f-1).

3. The butterfly valve with good sealing performance according to claim 1 or 2, characterized in that: A sliding groove (201e-1) is provided in the first pulley (201e), a locking block (201g) is provided in the sliding groove (201e-1), and one end of the locking block (201g) is triangular.

4. The butterfly valve with good sealing performance according to claim 3, characterized in that: A spring (201h) is fixed to one end of the locking block (201g), and the other end of the spring (201h) is fixed to the inner wall of the sliding groove (201e-1).

5. The butterfly valve with good sealing performance according to claim 4, characterized in that: A locking groove (201d-1) is provided in the sleeve (201d), and the locking block (201g) can be engaged with the locking groove (201d-1).

6. The butterfly valve with good sealing performance according to claim 4 or 5, characterized in that: The outer shells of the first pulley (201e) and the second pulley (201f) are provided with belts (201i).

7. The butterfly valve with good sealing performance according to claim 6, characterized in that: The sleeve (201d) is connected to the valve body (101) via a bearing.

8. The butterfly valve with good sealing performance according to claim 7, characterized in that: The second pulley (201f) is connected to the rotating shaft (103) bearing.

9. The butterfly valve with good sealing performance according to claim 7 or 8, characterized in that: The threaded column (202e) is connected to the valve body (101) via a bearing.

10. The butterfly valve with good sealing performance according to claim 9, characterized in that: The main body component (100) further includes a handwheel (104) and a speed reduction mechanism (105), wherein the handwheel (104) is fixed to one side of the rotating shaft (103), and the speed reduction mechanism (105) is arranged on the top of the valve body (101).

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