Butterfly valve capable of preventing deviation of sealing rubber ring

Abstract

The utility model discloses a butterfly valve capable of preventing a sealing rubber ring from shifting, which relates to the technical field of butterfly valve sealing rings and comprises a butterfly valve body, a valve handle penetrating out of the butterfly valve body is longitudinally and rotatably arranged in the butterfly valve body, and a sealing component is fixedly wrapped on the outer wall of the valve handle in the butterfly valve body. A sealing assembly in contact with the butterfly plate is assembled on the inner wall of the curved surface of the butterfly valve body; the sealing assembly comprises two sets of sealing rubber arc pieces making contact with the inner wall of the butterfly valve body. The two sets of sealing rubber arc pieces form the annular sealing ring on the butterfly valve body, the damaged rubber ring can be replaced and installed conveniently in the later period, the procedure of manually disassembling the butterfly plate can be omitted, convenience is provided for manual replacement work, meanwhile, the blocking effect on the rubber ring is improved through the metal arc pieces and the metal ring, and the service life of the butterfly valve is prolonged. The thrust to the rubber ring when the butterfly plate is opened and closed can be better dealt with, and the rubber ring can be better prevented from deviating.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valve sealing rings, and specifically relates to a butterfly valve for preventing the deviation of a sealing rubber ring. Background Technique

[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. The valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media. It mainly plays a role of cutting off and throttling in a pipeline.

[0003] A butterfly valve for preventing the deviation of a sealing rubber ring disclosed in the existing patent (authorized announcement number: CN 208831748 U) increases the contact area between the sealing rubber ring and the butterfly valve body through the cooperation of an annular groove and a convex ring, and increases the frictional resistance between the sealing rubber ring and the butterfly valve body, thereby effectively preventing the deviation of the sealing rubber ring.

[0004] However, the above technical solution still has certain defects. The sealing ring is made of annular rubber material. When replacing a severely worn sealing ring, it is necessary to completely disassemble the butterfly plate to replace the sealing ring, which causes waste of manpower and material resources. Therefore, a butterfly valve for preventing the deviation of a sealing rubber ring is proposed. Content of the Utility Model

[0005] Based on this, the purpose of the utility model is to provide a butterfly valve for preventing the deviation of a sealing rubber ring to solve the technical problems raised in the above background.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A butterfly valve for preventing the deviation of a sealing rubber ring, including a butterfly valve body. A valve handle longitudinally rotating through the butterfly valve body is provided inside the butterfly valve body. A sealing component is fixedly wrapped on the outer wall of the valve handle inside the butterfly valve body. A sealing component in contact with the butterfly plate is assembled on the curved inner wall of the butterfly valve body.

[0007] The sealing component includes two groups of sealing rubber arc pieces in contact with the inner wall of the butterfly valve body. Metal arc pieces are fixed at the front and rear ends of each group of sealing rubber arc pieces. Annular grooves for placement are opened at positions near the front and rear ends of the inner wall of the butterfly valve body. Metal rings are rotatably provided in the annular grooves for placement. Arc-shaped cards extending into the two groups of metal arc pieces are fixed on the curved inner walls of the metal rings. Arc grooves are opened at the contact positions between the outer walls of the metal arc pieces and the arc-shaped cards.

[0008] As a preferred technical solution of the butterfly valve for preventing the deviation of a sealing rubber ring of the utility model, the end face of the sealing rubber arc piece is trapezoidal, and a constraint annular groove matching it is opened on the inner wall of the butterfly valve body.

[0009] As a preferred technical solution of the butterfly valve for preventing the sealing rubber ring from shifting in the present utility model, a hidden ring groove is provided on the curved inner wall of the placement ring groove, the curved outer wall of the metal ring extends into the hidden ring groove, and a rubber gasket in contact with the outer wall of the metal ring is provided on the curved inner wall of the hidden ring groove.

[0010] As a preferred technical solution of the butterfly valve for preventing the sealing rubber ring from shifting in the present utility model, arc openings are provided at the contact positions of the ends of the two groups of sealing rubber arc pieces with the valve stem.

[0011] As a preferred technical solution of the butterfly valve for preventing the sealing rubber ring from shifting in the present utility model, notches larger than the size of the arc-shaped cards are reserved at the ends of the two groups of metal arc pieces.

[0012] As a preferred technical solution of the butterfly valve for preventing the sealing rubber ring from shifting in the present utility model, the inner diameter of the inner wall of the metal arc piece is equal to the inner diameter of the butterfly valve body.

[0013] As a preferred technical solution of the butterfly valve for preventing the sealing rubber ring from shifting in the present utility model, anti-slip lines are provided on the end face of the metal ring away from the butterfly valve body.

[0014] In summary, the present utility model mainly has the following beneficial effects:

[0015] The present utility model uses two groups of sealing rubber arc pieces to form an annular sealing ring on the butterfly valve body, realizing the replacement of the damaged rubber ring in the later stage and convenient installation. The process of manually disassembling the butterfly plate can be omitted, providing convenience for manual replacement work. At the same time, the use of metal arc pieces and metal rings increases the blocking effect on the rubber ring, better coping with the thrust on the rubber ring when the butterfly plate is opened and closed, and better blocking the situation of rubber ring shift. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional view of the present utility model;

[0017] Figure 2 is an exploded sectional view of the present utility model;

[0018] Figure 3 is an exploded view of the sealing assembly of the present utility model;

[0019] Figure 4 is a three-dimensional structural diagram of the butterfly valve body of the present utility model;

[0020] Figure 5 is a front view sectional view of the butterfly valve body of the present utility model.

[0021] In the figure: 100, butterfly valve body; 101, restraint ring groove; 102, placement ring groove; 103, hidden ring groove;

[0022] 110. Butterfly plate; 120. Valve stem; 130. Sealing assembly; 131. Sealing rubber arc piece; 132. Metal ring; 133. Arc-shaped card; 134. Metal arc piece; 135. Arc groove; 136. Arc opening. Specific embodiments

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention.

[0024] The embodiments of the present invention will be described below according to the overall structure of the present invention.

[0025] A butterfly valve for preventing the offset of a sealing rubber ring, as Figures 1 to 5 shown, includes a butterfly valve body 100. A valve stem 120 that longitudinally rotates and penetrates outside the butterfly valve body 100 is provided inside the butterfly valve body 100. A sealing assembly 130 is fixedly wrapped on the outer wall of the valve stem 120 inside the butterfly valve body 100. A sealing assembly 130 that contacts the butterfly plate 110 is assembled on the curved inner wall of the butterfly valve body 100;

[0026] The sealing assembly 130 includes two groups of sealing rubber arc pieces 131 that contact the inner wall of the butterfly valve body 100. Metal arc pieces 134 are fixed at the front and rear ends of each group of sealing rubber arc pieces 131. Annular grooves 102 are opened at positions near the front and rear ends of the inner wall of the butterfly valve body 100. Metal rings 132 are rotatably provided in the annular grooves 102. Arc-shaped cards 133 that extend into the two groups of metal arc pieces 134 are fixed on the curved inner walls of the metal rings 132. Arc grooves 135 are opened at the contact positions between the outer walls of the metal arc pieces 134 and the arc-shaped cards 133.

[0027] When putting the sealing ring, first rotate the valve stem 120 to drive the butterfly plate 110 to rotate to a state perpendicular to the butterfly valve body 100, and place a group of sealing rubber arc pieces 131 in the constraint ring groove 101 opened in the butterfly valve body 100. At the same time, the metal arc pieces 134 at the front and rear ends are placed in the annular grooves 102. Then repeat the above operation to put the other group of sealing rubber arc pieces 131, so that the two form an annular sealing ring in the butterfly valve body 100. Finally, rotate the two metal rings 132 on the front and rear end faces of the butterfly valve body 100, so that the arc-shaped cards 133 on their inner walls move along a circular trajectory and enter the arc grooves 135, thereby blocking the metal arc pieces 134 and the sealing rubber arc pieces 131, and further achieving the purpose of preventing the offset of the sealing ring composed of the two groups of sealing rubber arc pieces 131 in the butterfly valve body 100.

[0028] Please refer specifically to Figure 2 , Figure 3 andFigure 4 The end face of the sealing rubber arc piece 131 is trapezoidal, and a matching constraint ring groove 101 is provided on the inner wall of the butterfly valve body 100.

[0029] The trapezoidal shape can prevent the sealing rubber arc piece 131 from shifting as the butterfly plate 110 rotates, ensuring the sealing performance of the butterfly valve when closed.

[0030] Please refer specifically to Figure 5 On the curved inner wall of the placement ring groove 102, a hidden ring groove 103 is provided. The curved outer wall of the metal ring 132 extends into the hidden ring groove 103, and a rubber gasket in contact with the outer wall of the metal ring 132 is provided on the curved inner wall of the hidden ring groove 103.

[0031] The hidden ring groove 103 hides part of the outer wall of the metal ring 132, ensuring that the metal ring 132 can rotate around the fixed point of the center of the hidden ring groove 103, and cooperating with the rubber gasket to increase the friction between the two, ensuring the stability of the metal ring 132 after rotating to the specified position.

[0032] Please refer specifically to Figure 3 At the contact position between the ends of the two groups of sealing rubber arc pieces 131 and the valve stem 120, arc openings 136 are provided.

[0033] This enables the two groups of sealing rubber arc pieces 131 to fully contact the curved outer wall of the valve stem 120, achieving the purpose of all-round sealing.

[0034] Please refer specifically to Figure 2 At the ends of the two groups of metal arc pieces 134, notches larger than the size of the arc-shaped cards 133 are reserved.

[0035] This facilitates the insertion of the sealing rubber arc piece 131 and the embedding of the metal arc piece 134 into the front and rear ends of the butterfly valve body 100, thus facilitating the disassembly and assembly of the sealing ring.

[0036] Please refer specifically to Figure 1 The inner diameter of the inner wall of the metal arc piece 134 is equal to the inner diameter of the butterfly valve body 100.

[0037] This ensures that there are no obstacles on the inner wall of the butterfly valve body 100, so that the liquid will not be blocked when passing through here, thus achieving the effect of avoiding water flow impact.

[0038] Please refer specifically to Figure 1 On the end face of the metal ring 132 away from the butterfly valve body 100, anti-slip patterns are provided.

[0039] The anti-slip patterns are used to increase the friction coefficient of the end face of the metal ring 132, ensuring convenience during manual or tool-assisted rotation.

[0040] During use, when installing the sealing ring, first rotate the valve handle 120 to drive the butterfly plate 110 to rotate to a state perpendicular to the butterfly valve body 100. Place a set of sealing rubber arc pieces 131 into the restraint ring groove 101 opened in the butterfly valve body 100. At the same time, place the metal arc pieces 134 at the front and rear ends into the placement ring groove 102. Then repeat the above operation to install another set of sealing rubber arc pieces 131, so that the two form an annular sealing ring within the butterfly valve body 100. Finally, rotate the two metal rings 132 on the front and rear end faces of the butterfly valve body 100, so that the arc-shaped cards 133 on their inner walls move along a circular trajectory and enter the arc grooves 135, thereby blocking the metal arc pieces 134 and the sealing rubber arc pieces 131, and further achieving the purpose of preventing the sealing ring composed of two sets of sealing rubber arc pieces 131 within the butterfly valve body 100 from shifting. The parts not involved in this device are the same as or can be implemented using the prior art.

[0041] Although the embodiments of the present invention have been shown and described, the specific embodiments are only explanations of the present invention and not limitations thereof. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can, without departing from the principles and purposes of the present invention, make modifications, substitutions and variations that do not contribute creatively to the embodiments as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A butterfly valve for preventing a sealing rubber ring from deflecting, comprising a butterfly valve body (100), characterized in that: A valve handle (120) is longitudinally rotatably disposed in the butterfly valve body (100) and extends to the outside of the butterfly valve body (100); a sealing component (130) is fixedly wrapped around the outer wall of the valve handle (120) in the butterfly valve body (100); and a sealing component (130) in contact with the butterfly plate (110) is mounted on the curved inner wall of the butterfly valve body (100); The sealing assembly (130) comprises two groups of sealing rubber arc sheets (131) in contact with the inner wall of the butterfly valve body (100), the front and rear ends of each group of the sealing rubber arc sheets (131) are fixed with metal arc sheets (134), the inner wall of the butterfly valve body (100) is provided with a placement ring groove (102) near the front and rear ends, a metal ring (132) is rotatably arranged in the placement ring groove (102), the curved inner wall of the metal ring (132) is fixed with an arc-shaped card (133) extending into the two groups of metal arc sheets (134), and an arc groove (135) is provided at the contact position between the outer wall of the metal arc sheet (134) and the arc-shaped card (133).

2. A butterfly valve for preventing the sealing rubber ring from deflecting according to claim 1, characterized in that: The end surface of the sealing rubber arc sheet (131) is in the shape of a step, and the inner wall of the butterfly valve body (100) is provided with a restraining ring groove (101) matching the step.

3. A butterfly valve for preventing the sealing rubber ring from deflecting according to claim 1, characterized in that: The curved inner wall of the placement ring groove (102) is provided with a hidden ring groove (103), the curved outer wall of the metal ring (132) extends into the hidden ring groove (103), and the curved inner wall of the hidden ring groove (103) is provided with a rubber gasket in contact with the outer wall of the metal ring (132).

4. A butterfly valve for preventing the sealing rubber ring from deflecting according to claim 1, characterized in that: Arc openings (136) are formed at the positions where the ends of the two groups of sealing rubber arc sheets (131) contact the valve handle (120).

5. A butterfly valve for preventing the sealing rubber ring from deflecting according to claim 1, characterized in that: The ends of the two groups of metal arc sheets (134) are reserved with gaps larger than the size of the arc-shaped card (133).

6. A butterfly valve for preventing the sealing rubber ring from deflecting according to claim 1, characterized in that: The inner wall diameter of the metal arc sheet (134) is equal to the inner diameter of the butterfly valve body (100).

7. A butterfly valve for preventing the sealing rubber ring from deflecting according to claim 1, characterized in that: The end surface of the metal ring (132) away from the butterfly valve body (100) is provided with anti-slip grooves.

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