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CN-122014863-A - Butterfly valve

CN122014863ACN 122014863 ACN122014863 ACN 122014863ACN-122014863-A

Abstract

The invention discloses a butterfly valve, which comprises a valve body, a bushing coaxially embedded in the valve body, and a valve core assembly assembled in the bushing, wherein the valve core assembly comprises a valve rod which is assembled in a rotating way along the vertical direction and two valve plates which are symmetrically distributed and are respectively assembled on two sides of the valve rod in a rotating way through shaft rods, a rotating frame is fixedly arranged in the middle of the valve rod, connecting plates which are arranged in the middle are hinged on the front side, the rear side and the two sides of the rotating frame, and two ends of the two connecting plates are respectively hinged with the inner sides of the two valve plates. This butterfly valve, through setting up two valve plates that are symmetric distribution and rotate respectively in the valve rod both sides, optimized eccentric wear problem, improved the stability and the life of valve plate greatly, simultaneously, with the help of rotating turret and connecting plate, formed a stable linkage structure for two valve plates can move in step, steadily in opening and closing the in-process, have further strengthened the sealing performance of valve.

Inventors

  • XU ZHENLIANG
  • LU JIANMING
  • XIE ZUOZHENG
  • TANG YONGJIAN
  • YE TINGTING

Assignees

  • 方圆阀门集团有限公司

Dates

Publication Date
20260512
Application Date
20260306

Claims (7)

  1. 1. A butterfly valve is characterized by comprising a valve body (100), a bushing (200) coaxially embedded in the valve body (100), and a valve core assembly (300) assembled in the bushing (200); The valve core assembly (300) comprises a valve rod (310) which is assembled in a rotating mode along the vertical direction and two valve plates (330) which are symmetrically distributed and are assembled on two sides of the valve rod (310) in a rotating mode through shaft rods (320), a rotating frame (340) is fixedly arranged in the middle of the valve rod (310), connecting plates (350) which are arranged in the middle are hinged to the front side and the back side of the rotating frame (340), and two ends of the connecting plates (350) are hinged to the inner sides of the two valve plates (330) respectively.
  2. 2. A butterfly valve according to claim 1, wherein the two ends of the valve rod (310) and the two ends of the two shaft rods (320) are respectively provided with a shaft sleeve (360) for rotating connection, the bottom sides of the top, the bottom and the middle of the two sides of the valve body (100) are respectively provided with a mounting seat (110) which extends outwards perpendicularly for sinking and embedding the shaft sleeve (360), the outer side of each mounting seat (110) is respectively provided with a cover plate (120) by a coaxial flange, and the top side of the middle of the valve body (100) is provided with a flange seat (130) which extends outwards perpendicularly for sinking and embedding the shaft sleeve (360).
  3. 3. A butterfly valve as in claim 2 wherein the inner side of the cover plate (120) is coaxially fitted with a planar pad (140), and the flange seat (130) is internally fitted with a packing (150) at the top of the sleeve (360).
  4. 4. The butterfly valve of claim 1, wherein the bushing (200) comprises a sleeve (210) and two rubber sleeves (220) coaxially embedded at two ends of the sleeve (210), and a plurality of O-shaped rings (230) are coaxially arranged on outer walls of two sides of the bushing (200).
  5. 5. The butterfly valve of claim 4, further comprising a plurality of locking screws (160) distributed in an annular array and vertically threaded through the middle of the outer wall of the valve body (100), wherein a plurality of positioning holes (2110) for accommodating the end parts of the locking screws (160) in an adapting way are formed in the middle of the outer wall of the sleeve (210).
  6. 6. The butterfly valve as claimed in claim 1, wherein the valve plate (330) comprises a butterfly plate (3310) and a sealing ring (3320) coaxially mounted on the outer side of the butterfly plate (3310), and a pressing plate (3340) fixedly connected to the outer side of the butterfly plate (3310) through a plurality of inner hexagon screws (3330), the sealing ring (3320) is arranged between the pressing plate (3340) and the butterfly plate (3310) in a cushioning fit manner, the periphery of the sealing ring is attached to the inner wall of the bushing (200), a fixing sleeve (3350) for a shaft rod (320) to penetrate and assemble is arranged in the middle of the inner side of the butterfly plate (3310), and hinge bases (3360) for hinging the end parts of the connecting plates (350) are arranged on the inner side of the butterfly plate (3310) and on two sides of the fixing sleeve (3350).
  7. 7. The butterfly valve of claim 1, wherein the rotating frame (340) comprises two unit frames (3410) symmetrically distributed and spliced and sleeved outside the valve rod (310), and U-shaped grooves (3420) for hinging the middle part of the connecting plate (350) are formed in the two unit frames (3410).

Description

Butterfly valve Technical Field The invention relates to the technical field of valves, in particular to a butterfly valve. Background The butterfly valve is used as a widely applied fluid control device and plays a key role in a plurality of industrial fields, the traditional butterfly valve generally adopts a single valve plate structure, and the working principle of the butterfly valve is that a valve plate is driven to rotate through the driving action of a valve rod, so that the opening and closing operation of the valve is realized. In the process of implementing the present invention, the inventor finds that at least the following problems exist in the prior art: In practical application, the butterfly valve with the traditional single valve plate structure is supported by only relying on a single shaft, frequent contact and friction between the valve plate and the valve seat are unavoidable in the long-term operation process, the friction can lead to eccentric wear phenomenon along with the pushing of service time, once eccentric wear happens, the valve plate can not be kept stable in the rotation process, the inclination is very easy to occur, the sealing performance between the valve plate and the valve seat can be greatly reduced after the valve plate is inclined, the problem of medium leakage is further caused, the resource waste can be caused, the pollution to the surrounding environment is also likely to happen, in some pipeline systems related to dangerous mediums, even safety accidents can be caused, in addition, the inclination of the valve plate can lead to uneven force on the valve rod in the rotation process, operation blocking is caused, the normal opening and closing of the valve are influenced, the operation efficiency and the reliability of the whole system are reduced, and the maintenance cost and the shutdown time of equipment are increased. Therefore, the above technical problems need to be solved. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides a butterfly valve, which solves the problems in the background art. In order to solve the technical problems, the basic technical scheme provided by the invention is as follows: a butterfly valve comprises a valve body, a bushing coaxially embedded in the valve body, and a valve core assembly assembled in the bushing, The valve core assembly comprises a valve rod and two valve plates, wherein the valve rod is assembled in a rotating mode along the vertical direction, the two valve plates are symmetrically distributed and are assembled on two sides of the valve rod in a rotating mode through shaft rods, a rotating frame is fixedly arranged in the middle of the valve rod, connecting plates are arranged in the middle in a hinged mode on the front side and the rear side of the rotating frame, and two ends of the connecting plates are hinged to the inner sides of the two valve plates respectively. Preferably, the two ends of the valve rod and the two ends of the two shaft rods are respectively provided with a shaft sleeve for rotating connection, the top parts and the bottom parts of the two sides of the valve body and the bottom side of the middle part are respectively provided with an installation seat which extends outwards perpendicularly and can be used for the shaft sleeve to sink and embed, the outer side of each installation seat is respectively provided with a cover plate with a coaxial flange, and the top side of the middle part of the valve body is provided with a flange seat which extends outwards perpendicularly and can be used for the shaft sleeve to sink and embed. Wherein, the axle sleeve is all equipped with at the both ends of valve rod and the both ends of two axostylus axostyles, the axle sleeve provides low friction's support for the rotation of valve rod and axostylus axostyle, the top at valve body both sides and the bottom side at middle part all are equipped with the perpendicular outside mount pad that extends, these mount pads are used for sinking to inlay the dress axle sleeve, the rotation of valve rod and axostylus axostyle provides stable supporting point, the equal coaxial flange in outside of every mount pad is equipped with the apron, the apron plays protection axle sleeve and sealed effect, prevent that external impurity from getting into the normal operating that influences the valve, the top side at valve body middle part is equipped with the flange seat that extends outside perpendicularly, be used for sinking equally to inlay the dress axle sleeve, further strengthened valve rod pivoted stability. Preferably, the inner side of the cover plate is coaxially attached with a plane pad, and a filler is embedded in the flange seat and at the top of the shaft sleeve. The inner side of the cover plate is coaxially attached with the plane pad, the plane pad can increase the sealing performance between the cover plate and the mounting seat, medium leakage is prevente