An adjustable seal butterfly valve

Abstract

The utility model relates to valve technical field especially is involved in a kind of butterfly valve of adjustable sealing, still including sealing adjustment subassembly and end cap, the end cap is connected with butterfly plate by fastener, the adjustment cavity for sealing adjustment subassembly installation is formed between the end cap and butterfly plate, the sealing adjustment subassembly includes sealing element and adjustment piece, the valve seat is equipped with hard sealing layer, the hard sealing layer is inclined to set, the butterfly plate is sealed with hard sealing layer by sealing element, the butterfly plate is equipped with the adjustment hole that adjustment cavity is communicated, the adjustment piece is inserted into adjustment cavity and sealing element abuts by adjustment hole, and the adjustment piece is screwed with adjustment hole by outer thread, the length of the adjustment piece is greater than the length of adjustment hole, the utility model installs sealing adjustment subassembly on butterfly plate, butterfly plate is sealed with the hard sealing layer of valve seat by sealing element, sealing element can also adjust position by adjustment piece, compensate after sealing element wear, guarantee good sealing property.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to an adjustable sealing butterfly valve. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve. It is a valve whose opening and closing mechanism is achieved by the rotation of a disc around its axis. Butterfly valves can be used to control the flow of various types of fluids, including air, water, steam, various corrosive media, slurry, oil, liquid metals, and radioactive media. In pipelines, they primarily function as shut-off and throttling devices. The opening and closing element of a butterfly valve is a disc-shaped plate that rotates around its own axis within the valve body, thereby achieving the purpose of opening, closing, or regulation.

[0003] Existing butterfly valves experience frequent friction between the butterfly plate and valve seat due to long-term and frequent opening and closing, resulting in severe wear of the sealing surface and a significant decrease in sealing performance. Continued use may cause the butterfly plate and valve seat to fail to close tightly, leading to leakage in the butterfly valve. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide an adjustable sealing butterfly valve. This invention installs a sealing adjustment component on the butterfly plate. The butterfly plate is sealed with the hard sealing layer of the valve seat through the sealing element. The position of the sealing element can also be adjusted by the adjustment component to compensate for the wear of the sealing element and ensure good sealing performance.

[0005] The technical solution adopted by this utility model is as follows: An adjustable sealing butterfly valve includes a valve body, a valve seat, a butterfly plate, a valve stem, and a valve cover. The valve seat is disposed on the inner wall of the valve body, and the valve cover is installed on one side of the valve body. One end of the valve stem is connected to the butterfly plate, and the other end extends through the valve cover to the outside. The butterfly plate is disposed inside the valve body and is driven by the valve stem to seal with the valve seat. The valve body also includes a sealing adjustment component and an end cap. The end cap is connected to the butterfly plate by fasteners. An adjustment cavity for installing the sealing adjustment component is formed between the end cap and the butterfly plate. The sealing adjustment component includes a sealing element and an adjustment element. The valve seat is provided with a hard sealing layer, which is inclined. The butterfly plate is sealed with the hard sealing layer through the sealing element. The butterfly plate is provided with an adjustment hole communicating with the adjustment cavity. The adjustment element extends into the adjustment cavity through the adjustment hole and abuts against the sealing element. The adjustment element is threaded with the adjustment hole through an external thread. The length of the adjustment element is greater than the length of the adjustment hole.

[0006] The sealing element includes a sliding ring and an elastic sealing layer. The outer edge of the sliding ring extends to a connecting portion. The elastic sealing layer wraps around the outside of the connecting portion and is used to seal with the hard sealing layer.

[0007] The end of the connecting part is provided with a circular snap-fit ​​part, and the part of the elastic sealing layer that mates with the circular snap-fit ​​part is in the shape of a ring.

[0008] The inner wall of the adjustment cavity near the adjustment component is provided with a sliding groove, and the sliding ring extends into the sliding groove with a sliding part for abutting against the adjustment component.

[0009] The sealing adjustment assembly also includes an elastic element, one side of which abuts against the sealing element and the other side against the end cap.

[0010] The outer edge of the end cap extends toward the adjustment cavity with a limiting portion.

[0011] The regulating element is provided in several parts, which are distributed along the circumference of the butterfly plate and are respectively located on both sides of the butterfly plate corresponding to the valve stem.

[0012] The beneficial effects of this utility model are as follows: This utility model installs a sealing adjustment component on the butterfly plate. The butterfly plate is sealed with the hard sealing layer of the valve seat through a sealing element. The position of the sealing element can also be adjusted by an adjustment element. The adjustment element is connected to the butterfly plate by a threaded connection. By rotating the adjustment element, the adjustment element extends into or out of the adjustment cavity. When the adjustment element extends into the adjustment cavity, it pushes the sealing element towards the valve seat. The closer the sealing element is to the valve seat, the more tightly it fits with the inclined hard sealing layer on the valve seat. After the sealing element wears, the sealing compensation can be achieved by adjusting the position of the sealing element to ensure good sealing performance. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0014] Figure 1 This is a cross-sectional schematic diagram of an adjustable sealing butterfly valve according to the present invention.

[0015] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0016] Figure 3 This is a cross-sectional view of the present invention from another perspective;

[0017] Figure 4 for Figure 3 A magnified view of a portion of point B in the middle;

[0018] In the figure, 1-valve body, 2-valve seat, 3-butterfly plate, 4-valve stem, 5-valve cover, 6-end cover, 7-fastener, 8-adjusting chamber, 9-seal, 10-adjusting component, 11-hard sealing layer, 12-sliding ring, 13-elastic sealing layer, 14-connecting part, 15-circular snap-fit ​​part, 16-slide groove, 17-sliding part, 18-elastic component, 19-limiting part, 20-adjusting hole. Detailed Implementation

[0019] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0020] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0021] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0022] like Figures 1 to 4 As shown, this is an embodiment of the present invention: an adjustable sealing butterfly valve, comprising a valve body 1, a valve seat 2, a butterfly plate 3, a valve stem 4, and a valve cover 5. The valve seat 2 is disposed on the inner wall of the valve body 1, and the valve cover 5 is installed on one side of the valve body 1. One end of the valve stem 4 is connected to the butterfly plate 3, and the other end extends through the valve cover 5 to the outside. The butterfly plate 3 is disposed inside the valve body 1 and is driven by the valve stem 4 to seal against the valve seat 2. The valve also includes a sealing adjustment assembly and an end cap 6. The end cap 6 is connected to the butterfly plate 3 by fasteners 7, forming a seal between the end cap 6 and the butterfly plate 3. An adjustment cavity 8 is provided for mounting a sealing adjustment assembly, the sealing adjustment assembly including a sealing element 9 and an adjustment element 10. A hard sealing layer 11 is provided on the valve seat 2, the hard sealing layer 11 is inclined, the butterfly plate 3 is sealed with the hard sealing layer 11 through the sealing element 9, the butterfly plate 3 is provided with an adjustment hole 20 communicating with the adjustment cavity 8, the adjustment element 10 extends into the adjustment cavity 8 through the adjustment hole 20 and abuts against the sealing element 9, and the adjustment element 10 is threadedly engaged with the adjustment hole 20 through an external thread, the length of the adjustment element 10 is greater than the length of the adjustment hole 20.

[0023] The beneficial effects of this design are as follows: This invention installs a sealing adjustment component on the butterfly plate. The butterfly plate is sealed to the valve seat via a sealing element and a hard sealing layer. The sealing element can also be adjusted in position by an adjusting component. The adjusting component uses a threaded connection to engage with the butterfly plate. Rotating the adjusting component causes it to extend into or out of the adjustment cavity. As the adjusting component extends into the adjustment cavity, it pushes the sealing element towards the valve seat. The closer the sealing element is to the valve seat, the tighter it fits against the inclined hard sealing layer on the valve seat. After the sealing element wears down, adjusting its position achieves seal compensation, ensuring good sealing performance. The fasteners use existing technology screws to ensure a secure connection of the end cover, and the adjusting component uses existing technology bolts for easy rotation and adjustment.

[0024] In a further configuration, the sealing element 9 includes a sliding ring 12 and an elastic sealing layer 13. The outer edge of the sliding ring 12 extends to a connecting portion 14. The elastic sealing layer 13 wraps around the outside of the connecting portion 14 and is used to seal with the hard sealing layer 11.

[0025] The beneficial effects of this design are as follows: the sealing element adopts a combination of a sliding ring and an elastic sealing layer. The sliding ring is used for the adjustment component to abut against, and acts as a keel for the elastic sealing layer, making it easy to move the elastic sealing layer. The elastic sealing layer is used to seal with the hard sealing layer, which improves the sealing performance and reduces wear. The connection part provides support for the elastic sealing layer.

[0026] Furthermore, the end of the connecting part 14 is provided with a circular snap-fit ​​part 15, and the part of the elastic sealing layer 13 that cooperates with the circular snap-fit ​​part 15 is in the shape of a ring.

[0027] The beneficial effects of this design are as follows: the circular snap-fit ​​part increases the contact area with the elastic sealing layer and can also form a snap-fit ​​effect with the elastic sealing layer to prevent the elastic sealing layer from slipping off. When the elastic sealing layer is sealed with the hard sealing layer, the contact part will deform. The arc shape can help deform, increase the contact area with the hard sealing layer, and further improve the sealing effect.

[0028] Furthermore, the inner wall of the adjustment cavity 8 near the adjustment member 10 is provided with a groove 16, and the sliding ring 12 extends into the groove 16 with a sliding part 17 for abutting against the adjustment member 10.

[0029] The beneficial effects of this design are as follows: the sliding part is slidably positioned in the groove, which limits the sealing element in the radial direction of the butterfly plate, reduces the radial offset of the sealing element, and prevents leakage from one side of the sealing element.

[0030] Furthermore, the sealing adjustment assembly also includes an elastic element 18, one side of which abuts against the sealing element 9 and the other side of which abuts against the end cap 6.

[0031] The beneficial effects of this design are as follows: the elastic element adopts the existing technology of disc spring, which is set between the end cover and the seal. The disc spring and the adjusting element respectively limit the seal in both directions in the axial direction. The disc spring, together with the adjusting element, facilitates the adjustment of the position of the seal.

[0032] Furthermore, the outer edge of the end cap 6 extends toward the adjustment cavity 8 with a limiting portion 19.

[0033] The beneficial effects of this design are as follows: the disc spring is radially limited by the limiting part to prevent it from shifting or becoming misaligned; when the disc spring is compressed to its extreme value, it abuts against the side wall of the limiting part.

[0034] Further configuration: there are several adjusting members 10, which are distributed around the butterfly plate 3, and are located on the butterfly plate 3 at positions corresponding to both sides of the valve stem 4.

[0035] The advantages of this design are as follows: multiple adjustment components are set and distributed around the circumference of the butterfly plate, allowing for single-point adjustment on one side to improve the sealing performance. This enhances practicality. The components are positioned relative to each other on both sides of the valve stem to avoid being obstructed by the valve stem.

[0036] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An adjustable sealing butterfly valve, comprising a valve body (1), a valve seat (2), a butterfly plate (3), a valve stem (4), and a valve cover (5), wherein the valve seat (2) is disposed on the inner wall of the valve body (1), the valve cover (5) is installed on one side of the valve body (1), one end of the valve stem (4) is connected to the butterfly plate (3) and the other end extends through the valve cover (5) to the outside, the butterfly plate (3) is disposed inside the valve body (1) and is driven by the valve stem (4) to seal with the valve seat (2), characterized in that: It also includes a sealing adjustment assembly and an end cap (6). The end cap (6) is connected to the butterfly plate (3) by fasteners (7). An adjustment cavity (8) for installing the sealing adjustment assembly is formed between the end cap (6) and the butterfly plate (3). The sealing adjustment assembly includes a sealing element (9) and an adjustment element (10). A hard sealing layer (11) is provided on the valve seat (2). The hard sealing layer (11) is inclined. The butterfly plate (3) is sealed with the hard sealing layer (11) by the sealing element (9). An adjustment hole (20) communicating with the adjustment cavity (8) is provided on the butterfly plate (3). The adjustment element (10) extends into the adjustment cavity (8) through the adjustment hole (20) and abuts against the sealing element (9). The adjustment element (10) is threaded with the adjustment hole (20) by external threads. The length of the adjustment element (10) is greater than the length of the adjustment hole (20).

2. The adjustable sealing butterfly valve according to claim 1, characterized in that: The sealing element (9) includes a sliding ring (12) and an elastic sealing layer (13). The outer edge of the sliding ring (12) extends to a connecting portion (14). The elastic sealing layer (13) wraps around the outside of the connecting portion (14) and is used to seal with the hard sealing layer (11).

3. The adjustable sealing butterfly valve according to claim 2, characterized in that: The end of the connecting part (14) is provided with a circular snap-fit ​​part (15), and the part of the elastic sealing layer (13) that mates with the circular snap-fit ​​part (15) is in the shape of a ring.

4. The adjustable sealing butterfly valve according to claim 2, characterized in that: The inner wall of the adjustment cavity (8) near the adjustment member (10) is provided with a groove (16), and the sliding ring (12) extends into the groove (16) with a sliding part (17) for abutting against the adjustment member (10).

5. The adjustable sealing butterfly valve according to claim 1, characterized in that: The sealing adjustment assembly also includes an elastic element (18), one side of which abuts against the sealing element (9) and the other side of which abuts against the end cap (6).

6. The adjustable sealing butterfly valve according to claim 5, characterized in that: The outer edge of the end cap (6) extends toward the adjustment cavity (8) with a limiting part (19).

7. The adjustable sealing butterfly valve according to claim 1, characterized in that: The adjusting element (10) is provided in a plurality of parts, which are distributed around the butterfly plate (3) and are located on the butterfly plate (3) on both sides of the valve stem (4).

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