Bidirectional isobaric sealing high-performance butterfly valve

Abstract

The utility model provides a bidirectional isobaric sealing high-performance butterfly valve, which relates to the technical field of butterfly valve sealing and comprises a valve body and a worm gear case, the inside of the valve body is hollow and penetrates to the outer surfaces of two sides, a butterfly plate is arranged between the inner walls of the valve body and close to the edge of one side, a valve seat is arranged between the inner walls of the valve body and close to the edge of one side, and the worm gear case is connected with the butterfly plate. According to the utility model, the valve seat is arranged to be of a lip-shaped sealing structure, so that bidirectional isobaric sealing can be realized in the valve body, meanwhile, a high-performance sealing material is adopted to be matched with the lip-shaped sealing structure of the valve seat, so that the sealing performance of the butterfly valve is improved, and the sealing performance of the butterfly valve is improved. According to the butterfly valve, the good sealing effect is still kept under the poor working conditions of low temperature, high temperature, corrosion and the like, when the butterfly plate is regulated and controlled, the valve rod and the butterfly plate are eccentrically arranged, the butterfly plate can be driven to rotate when the valve rod is rotated, meanwhile, friction between the valve rod and the sealing ring can be reduced through the arrangement of the eccentric structure, and the service life of the valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valve sealing, in particular to a high-performance butterfly valve with bidirectional equal-pressure sealing. Background Art

[0002] A butterfly valve, also called a flap valve, is a simple-structured regulating valve. A butterfly valve used for the on-off control of a low-pressure pipeline medium refers to a valve in which the closing member (valve flap or butterfly plate) is a disc and rotates around the valve shaft to achieve opening and closing. It mainly functions as a cut-off and throttling in the pipeline. The opening and closing member of the butterfly valve is a disc-shaped butterfly plate that rotates around its own axis inside the valve body to achieve opening, closing or regulation.

[0003] Currently, when using a butterfly valve, since the sealing component inside the butterfly valve adopts rubber soft sealing, and the butterfly valve needs to be connected to both sides of the pipeline. When reverse negative pressure is generated at the pipeline outlet end, the valve cannot meet bidirectional equal-pressure sealing, resulting in easy damage to the butterfly valve spool. At the same time, in order to ensure the sealing performance of the rubber soft sealing, the use temperature of the fluid pipeline medium is limited and cannot exceed 85 degrees, which brings certain limitations to the use. Summary of the Utility Model

[0004] The utility model provides a high-performance butterfly valve with bidirectional equal-pressure sealing to solve the problems of the prior art.

[0005] To solve the above technical problems, the basic concept of the technical solution adopted by the utility model is as follows:

[0006] A high-performance butterfly valve with bidirectional equal-pressure sealing includes a valve body and a worm gear box. The inside of the valve body is hollow and penetrates through to both outer surfaces. A butterfly plate is arranged between the inner walls of the valve body near one side edge, and a valve seat is arranged between the inner walls of the valve body near one side edge. The side of the valve seat facing away from the butterfly plate is in a lip-shaped opening and extends towards the outside of the valve body. An insert is arranged on one outer surface of the valve body, and one outer surface of the insert is clamped on the valve seat, and the lip-shaped opening on one side of the valve seat extends into the insert.

[0007] Optionally, an insert spring is arranged on the outer surface of the insert, and the insert spring is located between the insert and the inner wall of the valve body.

[0008] Optionally, a bracket is fixed on the top of the valve body, the worm gear box is fixed on the top of the bracket, and a turntable is connected to the input end of the worm gear box.

[0009] Optionally, a valve rod is arranged inside the valve body, the valve rod is eccentrically arranged with respect to the butterfly plate, and the outer surface of the valve rod is in mutual contact with one outer surface of the butterfly plate.

[0010] Optionally, the top of the valve rod slides through to the upper part of the valve body and is connected to the output end of the worm gear box.

[0011] Optionally, a check washer is provided on the inner wall of one side of the valve body, a notch is formed on the outer surface of the valve stem, the check washer is engaged inside the notch, and a taper pin is provided on the inner top surface of the valve body.

[0012] Optionally, a packing is provided between the outer surface of the valve stem and the valve body, a gland is provided on the outer surface of the valve stem inside the valve body, and the bottom of the gland is pressed against the top of the packing.

[0013] After adopting the above technical solution, the present utility model has the following beneficial effects compared with the prior art. Of course, any product implementing the present utility model does not necessarily need to achieve all the advantages described below:

[0014] 1. In the present utility model, the valve seat is arranged in a lip seal structure, so that bidirectional equal-pressure sealing can be achieved inside the valve body. At the same time, a high-performance sealing material is used in cooperation with the lip seal structure of the valve seat to ensure good sealing effect under harsh working conditions such as low temperature, high temperature, and corrosion. When adjusting the butterfly plate, by arranging the valve stem and the butterfly plate eccentrically, the butterfly plate can be driven to rotate when the valve stem is rotated. At the same time, the eccentric structure can reduce the friction with the sealing ring and extend the service life of the valve.

[0015] In the present utility model, the worm gear box is fixed above the valve body through a bracket, and at the same time, the valve stem is connected to the output end of the worm gear box, so that the valve stem can be rotationally adjusted through the worm gear box. When adjusting the valve stem, since there is a notch on the valve stem and the notch is engaged with the check washer, the check washer can be used to prevent the valve stem from rotating in the reverse direction. When installing the valve stem, a packing is provided between the outer surface of the valve stem and the inside of the valve body, and the packing is compacted between the outer surface of the valve stem and the valve body through the gland, thereby improving the sealing strength between the valve stem and the valve body and preventing leakage. Brief Description of the Drawings

[0016] The following drawings in the description are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0017] Figure 1 is the main view three-dimensional structure schematic diagram of the bidirectional equal-pressure sealing high-performance butterfly valve proposed by the present utility model;

[0018] Figure 2 is the one-side sectional three-dimensional structure schematic diagram of the bidirectional equal-pressure sealing high-performance butterfly valve proposed by the present utility model;

[0019] Figure 3 is the sectional three-dimensional structure schematic diagram of the valve seat in the bidirectional equal-pressure sealing high-performance butterfly valve proposed by the present utility model;

[0020] Figure 4 This is the front view three-dimensional structural schematic diagram of the valve stem in the two-way equal-pressure sealing high-performance butterfly valve proposed by the present utility model.

[0021] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0022] 1. Valve body; 2. Butterfly plate; 3. Insert; 4. Valve seat; 5. Insert spring; 6. Valve stem; 7. Packing; 8. Gland; 9. Bracket; 10. Lock washer; 11. Taper pin; 12. Worm gear box; 13. Turntable; 14. Notch.

[0023] It should be noted that these attached drawings and text descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0024] Now, the present utility model will be further described in detail with reference to the attached drawings.

[0025] Embodiment 1, as Figures 1-4 shown, the present utility model provides a technical solution for a two-way equal-pressure sealing high-performance butterfly valve: including a valve body 1 and a worm gear box 12. The inside of the valve body 1 is hollow and penetrates to both outer surfaces. A butterfly plate 2 is arranged between the inner walls of the valve body 1 near one side edge, and a valve seat 4 is arranged between the inner walls of the valve body 1 near one side edge. The side of the valve seat 4 facing away from the butterfly plate 2 is in a lip-shaped opening and extends to the outside of the valve body 1. An insert 3 is arranged on one outer surface of the valve body 1, and one outer surface of the insert 3 is clamped on the valve seat 4, and the lip-shaped opening on one side of the valve seat 4 extends into the insert 3.

[0026] The effect achieved by the entire Embodiment 1 is that the valve seat 4 is set in a lip-shaped sealing structure, so that two-way equal-pressure sealing can be achieved inside the valve body 1. At the same time, a high-performance sealing material is used in cooperation with the lip-shaped sealing structure of the valve seat 4 to ensure good sealing effect under harsh working conditions such as low temperature, high temperature, and corrosion. When adjusting the butterfly plate 2, by setting the valve stem 6 and the butterfly plate 2 eccentrically, the butterfly plate 2 can be driven to rotate when the valve stem 6 rotates. At the same time, the setting of the eccentric structure can reduce the friction with the sealing ring and extend the service life of the valve.

[0027] Embodiment 2, as Figures 1-4As shown in the figure, a spring insert 5 is provided on the outer surface of the insert 3. The spring insert 5 is located between the insert 3 and the inner wall of the valve body 1. A bracket 9 is fixed to the top of the valve body 1. The worm gear box 12 is fixed to the top of the bracket 9. A turntable 13 is connected to the input end of the worm gear box 12. A valve stem 6 is provided inside the valve body 1. The valve stem 6 is eccentrically arranged with respect to the butterfly plate 2. The outer surface of the valve stem 6 is in mutual contact with the outer surface of one side of the butterfly plate 2. The top of the valve stem 6 slides through to the upper side of the valve body 1 and is connected to the output end of the worm gear box 12. A check washer 10 is provided on one inner wall of the valve body 1. A notch 14 is formed on the outer surface of the valve stem 6. The check washer 10 is engaged inside the notch 14. A taper pin 11 is provided on the inner top surface of the valve body 1. A packing 7 is provided between the outer surface of the valve stem 6 and the valve body 1. A gland 8 is provided on the outer surface of the valve stem 6 inside the valve body 1. The bottom of the gland 8 is pressed against the top of the packing 7.

[0028] The effect achieved by the entire Embodiment 2 is that the worm gear box 12 is fixed above the valve body 1 through the bracket 9, and at the same time, the valve stem 6 is connected to the output end of the worm gear box 12, so that the valve stem 6 can be rotationally adjusted through the worm gear box 12. When adjusting the valve stem 6, since there is a notch 14 on the valve stem 6 and the notch 14 is engaged with the check washer 10, it is possible to prevent the valve stem 6 from rotating in the reverse direction through the check washer 10. When installing the valve stem 6, a packing 7 is provided between the outer surface of the valve stem 6 and the inside of the valve body 1, and the packing 7 is compacted between the outer surface of the valve stem 6 and the valve body 1 through the gland 8, thereby improving the sealing strength between the valve stem 6 and the valve body 1 and preventing leakage.

[0029] Working principle: The valve seat 4 is set in a lip seal structure, enabling bidirectional equal-pressure sealing inside the valve body 1. At the same time, a high-performance sealing material is used in combination with the lip seal structure of the valve seat 4 to ensure good sealing performance under harsh working conditions such as low temperature, high temperature, and corrosion. When adjusting the butterfly plate 2, by eccentrically arranging the valve stem 6 with respect to the butterfly plate 2, the butterfly plate 2 can be driven to rotate when the valve stem 6 is rotated. At the same time, the eccentric structure can reduce the friction with the sealing ring and extend the service life of the valve. The worm gear box 12 is fixed above the valve body 1 through the bracket 9, and at the same time, the valve stem 6 is connected to the output end of the worm gear box 12, so that the valve stem 6 can be rotationally adjusted through the worm gear box 12. When adjusting the valve stem 6, since there is a notch 14 on the valve stem 6 and the notch 14 is engaged with the check washer 10, it is possible to prevent the valve stem 6 from rotating in the reverse direction through the check washer 10. When installing the valve stem 6, a packing 7 is provided between the outer surface of the valve stem 6 and the inside of the valve body 1, and the packing 7 is compacted between the outer surface of the valve stem 6 and the valve body 1 through the gland 8, thereby improving the sealing strength between the valve stem 6 and the valve body 1 and preventing leakage.

[0030] The present utility model is not limited to the above-mentioned embodiments. Any person should know that structural changes made under the inspiration of the present utility model, as long as they have the same or similar technical solutions as the present utility model, all fall within the protection scope of the present utility model. The technologies, shapes, and structures not described in detail in the present utility model are all well-known technologies.

Claims

1. A bidirectional isobaric sealing high-performance butterfly valve, comprising a valve body (1) and a worm gear box (12), characterized in that: The interior of the valve body (1) is hollow and extends to the outer surfaces on both sides. A butterfly plate (2) is arranged between the inner walls of the valve body (1) near one edge. A valve seat (4) is arranged between the inner walls of the valve body (1) near one edge. The valve seat (4) is lip-shaped and opens on the side facing away from the butterfly plate (2) and extends to the outside of the valve body (1). An insert (3) is arranged on the outer surface of one side of the valve body (1). The outer surface of one side of the insert (3) is engaged with the valve seat (4), and the lip-shaped opening on one side of the valve seat (4) extends to the inside of the insert (3).

2. The bidirectional isobaric sealing high-performance butterfly valve according to claim 1 is characterized in that: An insert spring (5) is provided on the outer surface of the insert (3), and the insert spring (5) is located between the insert (3) and the inner wall of the valve body (1).

3. The bidirectional isobaric sealing high-performance butterfly valve according to claim 2 is characterized in that: A bracket (9) is fixed on the top of the valve body (1), the worm gear box (12) is fixed on the top of the bracket (9), and a rotating disk (13) is connected to the input end of the worm gear box (12).

4. The bidirectional isobaric sealing high-performance butterfly valve according to claim 3 is characterized in that: A valve stem (6) is arranged inside the valve body (1); the valve stem (6) is eccentrically arranged with respect to the butterfly plate (2), and the outer surface of the valve stem (6) is in contact with the outer surface of one side of the butterfly plate (2).

5. The bidirectional isobaric sealing high-performance butterfly valve according to claim 4 is characterized in that: The top of the valve stem (6) slides through the top of the valve body (1) and is connected to the output end of the worm gear box (12).

6. The bidirectional isobaric sealing high-performance butterfly valve according to claim 5 is characterized in that: A back-stop washer (10) is provided on an inner wall of one side of the valve body (1), a notch (14) is provided on the outer surface of the valve stem (6), the back-stop washer (10) is engaged inside the notch (14), and a back-off pin (11) is provided on the inner top surface of the valve body (1).

7. The bidirectional isobaric sealing high-performance butterfly valve according to claim 6 is characterized in that: A packing (7) is arranged between the outer surface of the valve stem (6) and the valve body (1), and a gland (8) is arranged inside the valve body (1) on the outer surface of the valve stem (6), and the bottom of the gland (8) and the top of the packing (7) are pressed together.

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