Three-piece type fully-wrapped butterfly valve

Abstract

The utility model discloses a three-piece type full-wrapping butterfly valve which comprises a front valve body, a rear valve body and a sealing ring, a front inner cavity is formed in the front valve body, a rear inner cavity is formed in the rear valve body, the front inner cavity and the rear inner cavity are combined to form a cavity for placing the sealing ring, a limiting groove is formed in the face, facing the rear valve body, of the front valve body, and the sealing ring is arranged in the limiting groove. The surface, facing the front valve body, of the rear valve body is provided with a limiting protruding block complementary with the limiting groove in shape, the front valve body and the rear valve body can be quickly aligned through matching of the limiting groove and the limiting protruding block, the front valve body and the rear valve body can be conveniently locked through a bolt and a nut, and assembling is more convenient. In the using process, through cooperation of the limiting groove and the limiting protruding block, the bolt can be prevented from loosening due to relative rotation or shaking between the front valve body and the rear valve body.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, specifically relating to a three-piece fully enclosed butterfly valve. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve used for on / off control of low-pressure pipeline media. A butterfly valve consists of a valve body, a valve plate, a valve stem, and a sealing ring. The valve body has a cavity with an inlet and outlet connecting to the outside. The valve plate is disc-shaped and is housed within the cavity along with the sealing ring. The valve stem passes through the sealing ring and the valve body, and a manual or electric control is located at the end of the valve stem outside the valve body.

[0003] The three-piece fully enclosed butterfly valve is a type of butterfly valve. It has two valve bodies, and the two valve bodies have fixing holes for bolts to pass through at their opposite positions. The two valve bodies have inner cavities on their opposite surfaces. The two inner cavities are combined to form a cavity for placing the valve plate and the sealing ring. The outlet and inlet are respectively located on one inner cavity.

[0004] Existing three-piece fully enclosed butterfly valves rely on bolts and nuts for locking during assembly, creating an interference fit between the cavity and the sealing ring for sealing. However, the lack of pre-fixation between the sealing ring and the cavity during assembly allows for potential displacement of the sealing ring during the locking process between the front and rear valve bodies, affecting the sealing performance. In actual use, relative rotation or wobbling between the front and rear valve bodies may occur, leading to loosening of the bolts and consequently impacting the overall stability and sealing performance of the valve. Summary of the Invention

[0005] To overcome the shortcomings of the existing technology, this utility model provides a three-piece fully enclosed butterfly valve that is easy to assemble.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a three-piece fully enclosed butterfly valve, including a front valve body, a rear valve body, and a sealing ring. The front valve body is provided with a front inner cavity, and the rear valve body is provided with a rear inner cavity. The front inner cavity and the rear inner cavity are combined to form a cavity for placing the sealing ring. The front valve body is provided with a limiting groove on the surface facing the rear valve body, and the rear valve body is provided with a limiting protrusion whose shape is complementary to the limiting groove on the surface facing the front valve body.

[0007] Using the above solution, the front and rear valve bodies can be quickly aligned through the cooperation of the limiting groove and the limiting protrusion, making it easier for bolts and nuts to lock them together and simplifying assembly. During use, the cooperation of the limiting groove and the limiting protrusion prevents the bolts from loosening due to relative rotation or wobbling between the front and rear valve bodies.

[0008] As a further feature of this invention, the limiting groove is located at the opening of the front inner cavity facing the rear inner cavity, and the limiting groove is connected to the front inner cavity.

[0009] The above solution facilitates processing and assembly.

[0010] As a further feature of this invention, a fixing block is provided on the outer wall of the sealing ring, and a front fixing groove is provided on the cavity wall of the front inner cavity for the fixing block to be inserted. The front fixing groove is connected to the bottom of the limiting groove.

[0011] By adopting the above scheme, the cooperation between the fixing block and the front fixing groove facilitates the assembly of the sealing ring, while ensuring the stability of the sealing ring during the locking process of the front valve body and the rear valve body, thus guaranteeing the sealing effect of the valve.

[0012] As a further feature of this invention, the wall of the rear inner cavity is provided with a rear fixing groove for inserting a fixing block. The rear fixing groove extends to the limiting protrusion, and the length of the fixing block along the axis of the sealing ring is equal to the depth of the front fixing groove plus the depth of the rear fixing groove.

[0013] By adopting the above solution, the sealing ring remains stable during assembly and actual use.

[0014] The depth of the front fixing groove refers to the distance from the opening of the front fixing groove facing the rear valve body to the groove wall furthest from the rear valve body. The depth of the rear fixing groove refers to the distance from the opening of the rear fixing groove facing the rear valve body to the groove wall furthest from the rear valve body.

[0015] As a further feature of this invention, the length of the fixing block along the axis of the sealing ring is 1 / 2 to 2 / 3 of the length of the sealing ring along its own axis. The fixing block is in clearance fit with the front fixing groove and the fixing block is in clearance fit with the rear fixing groove.

[0016] The above solution facilitates the insertion of the fixing block into the front and rear fixing grooves while ensuring the sealing effect of the sealing ring.

[0017] As a further feature of this invention, the limiting groove includes two flat groove walls connected to the front inner cavity and an arc-shaped groove wall located between the two flat groove walls. The flat groove wall coincides with one of the radial lines of the front inner cavity, and the axis of the virtual cylinder in which the arc-shaped groove wall is located coincides with the axis of the front inner cavity.

[0018] By adopting the above scheme, a better anti-rotation effect can be achieved.

[0019] As a further feature of this invention, the cross-section of the fixing block along the radial direction of the sealing ring is semi-circular.

[0020] The above solution facilitates the movement of the fixed block.

[0021] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0022] Appendix Figure 1This is an exploded view of the overall structure of a specific embodiment of this utility model;

[0023] Appendix Figure 2 This is a schematic diagram of the front valve body of a specific embodiment of the present utility model;

[0024] Appendix Figure 3 This is a schematic diagram of the valve body in a specific embodiment of the present invention;

[0025] Appendix Figure 4 This is a schematic diagram of the sealing ring in a specific embodiment of the present invention.

[0026] Front valve body 1, front inner cavity 11, limiting groove 12, flat groove wall 121, arc-shaped groove wall 122, front fixing groove 13, rear valve body 2, rear inner cavity 21, limiting protrusion 22, rear fixing groove 23, sealing ring 3, fixing block 31, valve plate 4, valve stem 5, bolt 6, nut 7. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. 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 scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that, unless otherwise specified, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] Specific embodiments of this utility model are shown in the accompanying drawings.

[0030] A three-piece fully enclosed butterfly valve includes a front valve body 1, a rear valve body 2, a sealing ring 3, a valve plate 4, a valve stem 5, a bolt 6, and a nut 7. The front valve body 1 has a front inner cavity 11, and the rear valve body 2 has a rear inner cavity 21. The front inner cavity 11 and the rear inner cavity 21 combine to form a cavity for placing the sealing ring 3 and the valve plate 4. A limiting groove 12 is provided on the surface of the front valve body 1 facing the rear valve body 2, and a limiting protrusion 22 with a complementary shape to the limiting groove 12 is provided on the surface of the rear valve body 2 facing the front valve body 1. Through the cooperation of the limiting groove 12 and the limiting protrusion 22, the front valve body 1 and the rear valve body 2 can be quickly aligned, making it convenient for the bolt 6 and the nut 7 to lock them together, thus making assembly easier. During use, the cooperation of the limiting groove 12 and the limiting protrusion 22 can prevent the bolt 6 from loosening due to relative rotation or wobbling between the front valve body 1 and the rear valve body 2.

[0031] The limiting groove 12 is located at the opening of the front inner cavity 11 facing the rear inner cavity 21, and the limiting groove 12 is connected to the front inner cavity 11. This facilitates processing and assembly.

[0032] A fixing block 31 is provided on the outer wall of the sealing ring 3, and a front fixing groove 13 is provided on the cavity wall of the front inner cavity 11 for the fixing block 31 to be inserted. The front fixing groove 13 is connected to the bottom of the limiting groove 12. The cooperation between the fixing block 31 and the front fixing groove 13 facilitates the assembly of the sealing ring 3, and at the same time keeps the sealing ring 3 stable during the locking process of the front valve body 1 and the rear valve body 2, ensuring the sealing effect of the valve.

[0033] The wall of the rear inner cavity 21 is provided with a rear fixing groove 23 for the insertion of the fixing block 31. The rear fixing groove 23 extends to the limiting protrusion 22. The length of the fixing block 31 along the axis of the sealing ring 3 is equal to the depth of the front fixing groove 13 plus the depth of the rear fixing groove 23. The depth of the front fixing groove 13 refers to the distance from the opening of the front fixing groove 13 towards the rear valve body 2 to the groove wall away from the rear valve body 2. The depth of the rear fixing groove 23 refers to the distance from the opening of the rear fixing groove 23 towards the rear valve body 2 to the groove wall away from the rear valve body 2. This ensures that the sealing ring 3 remains stable during assembly and actual use.

[0034] The length of the fixing block 31 along the axis of the sealing ring 3 is 2 / 3 of the length of the sealing ring 3 along its own axis. The fixing block 31 is clearance-fitted with the front fixing groove 13 and the rear fixing groove 23. This facilitates the insertion of the fixing block 31 into the front fixing groove 13 and the rear fixing groove 23, while ensuring the sealing effect of the sealing ring 3.

[0035] The limiting groove 12 includes two flat groove walls 121 connected to the front inner cavity 11 and an arc-shaped groove wall 122 located between the two flat groove walls 121. The flat groove wall 121 coincides with one of the radial lines of the front inner cavity 11, and the axis of the virtual cylinder containing the arc-shaped groove wall 122 coincides with the axis of the front inner cavity 11. This achieves a better anti-rotation effect.

[0036] The cross-section of the fixing block 31 along the radial direction of the sealing ring 3 is semi-circular, which facilitates the movement of the fixing block 31.

[0037] This utility model is not limited to the specific embodiments described above. Those skilled in the art can implement this utility model using other specific embodiments based on the content disclosed in this utility model. Any simple changes or modifications made to the design structure and concept of this utility model will fall within the protection scope of this utility model.

Claims

1. A three-piece fully enclosed butterfly valve, comprising a front valve body, a rear valve body, and a sealing ring, wherein the front valve body has a front inner cavity, and the rear valve body has a rear inner cavity, the front inner cavity and the rear inner cavity being combined to form a cavity for placing the sealing ring, characterized in that: The front valve body has a limiting groove on the surface facing the rear valve body, and the rear valve body has a limiting protrusion on the surface facing the front valve body that is complementary in shape to the limiting groove.

2. A three-piece fully enclosed butterfly valve according to claim 1, characterized in that: The limiting groove is located at the opening of the front inner cavity facing the rear inner cavity, and the limiting groove is connected to the front inner cavity.

3. A three-piece fully enclosed butterfly valve according to claim 2, characterized in that: The outer wall of the sealing ring is provided with a fixing block, and the cavity wall of the front inner cavity is provided with a front fixing groove for the fixing block to be inserted. The front fixing groove is connected to the bottom of the limiting groove.

4. A three-piece fully enclosed butterfly valve according to claim 3, characterized in that: The wall of the rear inner cavity is provided with a rear fixing groove for inserting a fixing block. The rear fixing groove extends to the limiting protrusion. The length of the fixing block along the axis of the sealing ring is equal to the depth of the front fixing groove plus the depth of the rear fixing groove.

5. A three-piece fully enclosed butterfly valve according to claim 4, characterized in that: The length of the fixing block along the axis of the sealing ring is 1 / 2 to 2 / 3 of the length of the sealing ring along its own axis. The fixing block is in clearance fit with the front fixing groove and the fixing block is in clearance fit with the rear fixing groove.

6. A three-piece fully enclosed butterfly valve according to claim 5, characterized in that: The limiting groove includes two flat groove walls connected to the front inner cavity and an arc-shaped groove wall located between the two flat groove walls. The flat groove wall coincides with one of the radial lines of the front inner cavity, and the axis of the virtual cylinder in which the arc-shaped groove wall is located coincides with the axis of the front inner cavity.

7. A three-piece fully enclosed butterfly valve according to claim 6, characterized in that: The cross-section of the fixing block along the radial direction of the sealing ring is semi-circular.

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