A bidirectional zero-leak hard-seal butterfly valve

Abstract

The utility model discloses a bidirectional zero leakage's hard sealing butterfly valve relates to hard sealing butterfly valve technical field, and its technical scheme is: including butterfly valve seat main part, the butterfly valve seat main part inside is inserted with butterfly valve stem subassembly, and butterfly valve stem subassembly outside is equipped with butterfly plate unit, and butterfly plate unit includes butterfly plate body and two butterfly plate connecting piece parts, and butterfly valve stem subassembly includes butterfly valve stem, and butterfly valve stem both sides all are set up with the installation groove, and the beneficial effects of a bidirectional zero leakage's hard sealing butterfly valve are: through butterfly plate connecting piece part, the butterfly plate body is designed as detachable structure with butterfly valve stem, and the operator only needs to push the inclined head solution limit block, can easily remove the fixed connection of butterfly plate and butterfly valve stem, takes out butterfly plate from butterfly valve inside, completely changes the difficult situation of traditional in butterfly valve inside narrow space replacement sealing ring, significantly reduces the maintenance difficulty, greatly shortens the maintenance time, and greatly improves sealing ring replacement efficiency.

Description

Technical Field

[0001] This utility model relates to the field of hard-seal butterfly valve technology, specifically to a bidirectional zero-leakage hard-seal butterfly valve. Background Technology

[0002] Hard-seal butterfly valves are widely used in petroleum, chemical and other industrial fields due to their advantages such as simple structure, small size and convenient operation. They are important shut-off and throttling devices. However, in actual use, their core sealing component, the sealing ring, is easily affected by media erosion, corrosion and frequent opening and closing, resulting in wear and aging, leading to sealing failure and media leakage. Timely replacement is necessary to ensure the safe operation of the valve and system.

[0003] When replacing the sealing ring of an existing hard-seal butterfly valve, the usual practice is to operate inside the butterfly valve. However, the internal space of the butterfly valve is very limited, which brings great difficulties to the operation of maintenance personnel. The narrow space makes it difficult for maintenance personnel to use tools, making the operation process extremely inconvenient. This not only consumes a lot of manpower and time costs, but also results in low maintenance efficiency. Utility Model Content

[0004] Therefore, this utility model provides a bidirectional zero-leakage hard-seal butterfly valve. By using a butterfly plate connecting component, it solves the problem that when replacing the sealing ring of a hard-seal butterfly valve, the usual practice is to operate inside the butterfly valve. However, the internal space of the butterfly valve is very limited, which brings great difficulties to the operation of maintenance personnel. The narrow space makes it difficult for maintenance personnel to use tools.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a bidirectional zero-leakage hard-seal butterfly valve, comprising a butterfly valve seat body, a butterfly valve stem assembly inserted inside the butterfly valve seat body, a butterfly plate unit externally provided on the butterfly valve stem assembly, the butterfly plate unit comprising a butterfly plate body and two butterfly plate connecting components, the butterfly valve stem assembly comprising a butterfly valve stem, mounting grooves provided on both sides of the butterfly valve stem, and limit holes provided inside the two mounting grooves, the butterfly plate connecting components comprising a connecting block, a through groove provided on one side of the connecting block, two through holes provided on one side of the connecting block, a fixing block fixedly provided inside the connecting block, a movable plate provided inside the connecting block, an inclined groove provided on one side of the movable plate, two limit pins fixedly connected to one side of the movable plate, two spring pieces fixedly connected to the other side of the movable plate, and an inclined head release block provided inside the inclined groove.

[0006] Preferably, the butterfly valve stem passes through the butterfly valve seat body and is connected to the butterfly valve seat body via a sealed bearing.

[0007] Preferably, one end of the connecting block is fixedly connected to the butterfly plate body, and the connecting block is disposed inside the mounting groove and slidably connected to the mounting groove.

[0008] Preferably, the movable plate is located inside the connecting block, and one side of the movable plate is slidably connected to the fixed block.

[0009] Preferably, the limiting post passes through the through hole and is slidably connected to the through hole, and one end of the limiting post extends into the limiting hole and is slidably connected to the limiting hole.

[0010] Preferably, one end of the spring is fixedly connected to one side wall of the movable plate, and the other end of the spring is fixedly connected to one side wall of the connecting block.

[0011] Preferably, one end of the inclined head release block passes through the through groove and is slidably connected to the through groove.

[0012] Preferably, the other end of the inclined head release block extends into the inclined groove and is slidably connected to the inclined groove, and the other end of the inclined head release block contacts one side wall of the connecting block and is slidably connected to one side wall of the connecting block.

[0013] The present invention has the following advantages:

[0014] By using the butterfly plate connector, the butterfly plate body and the butterfly valve stem are designed to be detachable. Operators only need to push the inclined head release block to easily release the fixed connection between the butterfly plate and the butterfly valve stem and remove the butterfly plate from the inside of the butterfly valve. This completely changes the difficult situation of replacing the sealing ring in the narrow space inside the butterfly valve, significantly reduces the difficulty of maintenance, greatly shortens the maintenance time, and greatly improves the efficiency of sealing ring replacement.

[0015] Through the coordinated work of components such as the movable plate, spring, and limit post, the butterfly plate can be firmly fixed on the butterfly valve stem after installation. The precise fit between the limit post and the limit hole effectively restricts the axial and radial movement of the butterfly plate. Even when faced with external factors such as media pressure fluctuations and pipeline vibration, the butterfly plate will not loosen or shift, ensuring long-term stable operation of the valve, extending the valve's service life, and reducing the frequency of equipment maintenance.

[0016] The installation and removal of the butterfly plate can be completed without the need for complicated tools, simply by pushing the inclined head release block, which reduces the professional skills required of maintenance personnel and makes equipment maintenance easier to learn. At the same time, this simple operation method also improves the flexibility of equipment operation, making it easier to quickly perform maintenance and adjustments under different working conditions. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0019] Figure 1 This is a partial sectional perspective view of the main view provided for this utility model;

[0020] Figure 2 A partially exploded sectional view of the butterfly plate body in the disassembled state provided by this utility model.

[0021] Figure 3 Partial sectional perspective view of the butterfly plate connector component provided by this utility model;

[0022] Figure 4 Partial sectional exploded three-dimensional view of the butterfly plate connector component provided by this utility model Figure 1 ;

[0023] Figure 5 Partial sectional exploded three-dimensional view of the butterfly plate connector component provided by this utility model Figure 2 ;

[0024] Figure 6 The front-view stereoscopic view provided by this utility model.

[0025] In the figure: 1. Butterfly valve seat body, 2. Butterfly valve stem assembly, 21. Butterfly valve stem, 22. Mounting groove, 23. Limiting hole, 3. Butterfly plate body, 4. Butterfly plate connecting parts, 41. Connecting block, 42. Through groove, 43. Through hole, 44. Fixing block, 45. Movable plate, 46. Inclined groove, 47. Limiting post, 48. Spring piece, 49. Inclined head release block. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] See attached document Figure 1 - Appendix Figure 6This utility model provides a bidirectional zero-leakage hard-seal butterfly valve, including a butterfly valve seat body 1, a butterfly valve stem assembly 2 inserted inside the butterfly valve seat body 1, a butterfly plate unit outside the butterfly valve stem assembly 2, the butterfly plate unit including a butterfly plate body 3 and two butterfly plate connecting parts 4, the butterfly valve stem assembly 2 including a butterfly valve stem 21, mounting grooves 22 on both sides of the butterfly valve stem 21, and limit holes 23 inside the two mounting grooves 22, the butterfly plate connecting parts 4 including a connecting block 41, a through groove 42 on one side of the connecting block 41, two through holes 43 on one side of the connecting block 41, a fixing block 44 fixedly installed inside the connecting block 41, a movable plate 45 inside the connecting block 41, an inclined groove 46 on one side of the movable plate 45, two limit posts 47 fixedly connected to one side of the movable plate 45, two spring pieces 48 fixedly connected to the other side of the movable plate 45, and an inclined head release block 49 inside the inclined groove 46;

[0028] In this embodiment, to facilitate the removal of the butterfly plate body 3 from the butterfly valve seat body 1, when the sealing ring needs to be replaced, the butterfly plate body 3 is rotated to the back side. Figure 2 Then push the inclined head release block 49 so that it slides in the through groove 42 and goes deep into the inclined groove 46. The inclined surface structure of the inclined head release block 49, together with the inclined groove 46, pushes the movable plate 45 to move and compresses the spring piece 48, so that the limit post 47 exits from the limit hole 23. At this time, the butterfly plate body 3 and the butterfly valve stem 21 are disconnected from the fixed connection. The butterfly plate body 3 together with the butterfly plate connecting part 4 can be easily removed from the butterfly valve stem 21. The sealing ring can be replaced conveniently in the spacious space outside the butterfly valve. After the replacement is completed, reverse the installation steps and reinstall the butterfly plate body 3 back onto the butterfly valve stem 21 to restore the normal operation of the hard seal butterfly valve.

[0029] To achieve convenient disassembly and assembly, stable operation, and bidirectional zero leakage for the butterfly valve body 3, this device employs the following technical solution: the butterfly valve stem 21 penetrates the butterfly valve seat body 1 and is connected to it via a sealed bearing; one end of the connecting block 41 is fixedly connected to the butterfly valve body 3, and the connecting block 41 is located inside the mounting groove 22 and slidably connected to it; the limiting post 47 penetrates the through hole 43 and is slidably connected to it; one end of the limiting post 47 extends into the limiting hole 23 and is slidably connected to it; the butterfly valve stem 21 is connected to the butterfly valve seat body 1 via a sealed bearing. This sealed bearing ensures that the butterfly valve stem 21 rotates flexibly within the butterfly valve seat body 1, enabling the valve to open and close, and effectively prevents media leakage from the connection point, providing a fundamental guarantee for the bidirectional zero leakage sealing effect. One end of the connecting block 41 is fixedly connected to the butterfly valve body 3, and the other end is slidably connected to the mounting groove 22. This sliding connection structure allows the butterfly valve... The body 3 can be precisely inserted or withdrawn along the mounting groove 22, creating conditions for the rapid installation and disassembly of the butterfly plate. The limiting post 47 penetrates the through hole 43 and extends into the limiting hole 23. When the connecting block 41 is inserted into the mounting groove 22, under the elastic force of the spring piece 48, the limiting post 47 slides along the through hole 43 and automatically engages in the limiting hole 23. At this time, the cooperation between the limiting post 47 and the limiting hole 23 restricts the axial and radial movement of the butterfly plate body 3, allowing the butterfly plate and butterfly valve stem 2 to move together. 1. Secure connection to ensure that the butterfly plate will not loosen or shift during operation, maintaining the normal shut-off and throttling functions of the valve; when the butterfly plate needs to be disassembled, push the inclined head release block 49, the inclined head release block 49 presses the movable plate 45, so that the movable plate 45 drives the limit column 47 to overcome the elastic force of the spring piece 48 and slide out of the limit hole 23 along the through hole 43 in the opposite direction, thereby releasing the fixed connection between the butterfly plate body 3 and the butterfly valve stem 21, realizing easy disassembly of the butterfly plate and facilitating the replacement of the sealing ring;

[0030] To achieve quick locking and convenient disassembly of the butterfly plate, the device employs the following technical solution: A movable plate 45 is located inside the connecting block 41. One side of the movable plate 45 is slidably connected to the fixed block 44. One end of the spring piece 48 is fixedly connected to one side wall of the movable plate 45, and the other end of the spring piece 48 is fixedly connected to one side wall of the connecting block 41. One end of the inclined head release block 49 penetrates the through groove 42 and is slidably connected to the through groove 42. The other end of the inclined head release block 49 extends into the inclined groove 46 and is slidably connected to the inclined groove 46. The other end of the inclined head release block 49 is connected to the connecting block 41. One side of the connecting block 41 is in contact with and slidably connected to the side wall of the connecting block 41. The movable plate 45 is located inside the connecting block 41 and is slidably connected to the fixed block 44 on one side, providing guidance and limitation for the movement of the movable plate 45, so that it can only slide in a specific direction, ensuring the stability of the structure operation. The elastic force generated by the elastic deformation of the spring plate 48 provides a continuous thrust to the movable plate 45 in the direction of the limiting hole 23. When installing the butterfly plate, this elastic force pushes the movable plate 45, so that the limiting post 47 can be smoothly inserted into the limiting hole 23, and the butterfly plate body 3 is firmly fixed to the butterfly valve stem. 21. To ensure the butterfly valve does not detach due to medium pressure, vibration, or other factors during operation, one end of the inclined head release block 49 passes through the through groove 42 and is slidably connected to it. The other end extends into the inclined groove 46 and is slidably connected to it, and contacts and slidably connects to one side wall of the connecting block 41. When it is necessary to disassemble the butterfly plate to replace the sealing ring, the operator pushes the inclined head release block 49, utilizing its inclined head structure and the cooperation of the inclined groove 46 to convert the horizontal thrust of the inclined head release block 49 into a vertical pressing force on the movable plate 45. The movable plate 45 is subjected to this pressing force. Under the action of the spring plate 48, the spring plate 48 slides along the fixed block 44, driving the limiting pin 47 to exit from the limiting hole 23, thereby quickly releasing the fixed connection between the butterfly plate body 3 and the butterfly valve stem 21, allowing the butterfly plate to be easily removed from the butterfly valve seat body 1, greatly improving the convenience of replacing the sealing ring. When the sealing ring is replaced and the butterfly plate is reinstalled, the pushing force on the inclined head release block 49 is removed, and the spring plate 48 pushes the movable plate 45 to reset, so that the limiting pin 47 automatically locks into the limiting hole 23 again, completing the rapid locking of the butterfly plate and ensuring the normal use of the butterfly valve.

[0031] The usage process of this utility model is as follows: When using this utility model, if it is necessary to replace the sealing ring, rotate the butterfly plate body 3 to the back (e.g., Figure 2Then, push the inclined head release block 49 so that it slides in the through groove 42 and penetrates into the inclined groove 46. The inclined surface structure of the inclined head release block 49, in conjunction with the inclined groove 46, pushes the movable plate 45 to move and compresses the spring piece 48, so that the limiting post 47 exits from the limiting hole 23. At this time, the butterfly plate body 3 and the butterfly valve stem 21 are released from the fixed connection. The butterfly plate body 3, together with the butterfly plate connecting part 4, can be easily removed from the butterfly valve stem 21. The sealing ring can be conveniently replaced in the spacious space outside the butterfly valve. After replacement, reverse the installation steps and reinstall the butterfly plate body 3 back onto the butterfly valve stem 21 to restore the normal operation of the hard seal butterfly valve. When using this utility model, when installing the butterfly plate body 3, the above-mentioned operation on the inclined head release block 49 should be performed simultaneously to make the limiting post 47 exit from the limiting hole 23. The positioning post 47 is inserted into the through hole 43 to prevent the protruding positioning post 47 from affecting the insertion of the connecting block 41 into the mounting groove 22. The connecting block 41 of the butterfly plate connecting component 4 is aligned with the mounting groove 22 on the butterfly valve stem 21 and inserted. As the connecting block 41 goes deeper, the positioning post 47 on the movable plate 45 is automatically aligned with the positioning hole 23 and locked in it under the elastic force of the spring piece 48, realizing the rapid positioning and fixed connection between the butterfly plate body 3 and the butterfly valve stem 21. At the same time, when the movable plate 45 is reset, the inclined head release block 49 slides out of the inclined groove 46. The shape of the inclined head release block 49 prevents it from sliding out of the connecting block 41 through the through groove 42. At this time, the hard seal butterfly valve can be put into normal use, and its structural design achieves a bidirectional zero leakage sealing effect.

[0032] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A bidirectional zero-leakage hard-seal butterfly valve, comprising a butterfly valve seat body (1), characterized in that: The butterfly valve seat body (1) is internally fitted with a butterfly valve stem assembly (2). The butterfly valve stem assembly (2) is externally provided with a butterfly plate unit. The butterfly plate unit includes a butterfly plate body (3) and two butterfly plate connecting parts (4). The butterfly valve stem assembly (2) includes a butterfly valve stem (21). Mounting grooves (22) are provided on both sides of the butterfly valve stem (21). Limiting holes (23) are provided inside both mounting grooves (22). The butterfly plate connecting parts (4) include connecting blocks (41). The connecting blocks (41) are... A through groove (42) is provided on the side. Two through holes (43) are provided on one side of the connecting block (41). A fixing block (44) is fixedly provided inside the connecting block (41). A movable plate (45) is provided inside the connecting block (41). A slanted groove (46) is provided on one side of the movable plate (45). Two limiting posts (47) are fixedly connected to one side of the movable plate (45). Two spring pieces (48) are fixedly connected to the other side of the movable plate (45). A slanted head release block (49) is provided inside the slanted groove (46).

2. The bidirectional zero-leakage hard-seal butterfly valve according to claim 1, characterized in that: The butterfly valve stem (21) passes through the butterfly valve seat body (1) and is connected to the butterfly valve seat body (1) through a sealed bearing.

3. The bidirectional zero-leakage hard-seal butterfly valve according to claim 1, characterized in that: One end of the connecting block (41) is fixedly connected to the butterfly plate body (3), and the connecting block (41) is located inside the mounting groove (22) and is slidably connected to the mounting groove (22).

4. The bidirectional zero-leakage hard-seal butterfly valve according to claim 1, characterized in that: The movable plate (45) is located inside the connecting block (41), and one side of the movable plate (45) is slidably connected to the fixed block (44).

5. The bidirectional zero-leakage hard-seal butterfly valve according to claim 1, characterized in that: The limiting post (47) passes through the through hole (43) and is slidably connected to the through hole (43). One end of the limiting post (47) extends into the limiting hole (23) and is slidably connected to the limiting hole (23).

6. The bidirectional zero-leakage hard-seal butterfly valve according to claim 1, characterized in that: One end of the spring piece (48) is fixedly connected to one side wall of the movable plate (45), and the other end of the spring piece (48) is fixedly connected to one side wall of the connecting block (41).

7. The bidirectional zero-leakage hard-seal butterfly valve according to claim 1, characterized in that: One end of the inclined head release block (49) passes through the through groove (42) and is slidably connected to the through groove (42).

8. The bidirectional zero-leakage hard-seal butterfly valve according to claim 1, characterized in that: The other end of the inclined head release block (49) extends into the inclined groove (46) and is slidably connected to the inclined groove (46). The other end of the inclined head release block (49) contacts one side wall of the connecting block (41) and is slidably connected to one side wall of the connecting block (41).

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