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CN-117145987-B - High leakproofness double-leaf butterfly valve

CN117145987BCN 117145987 BCN117145987 BCN 117145987BCN-117145987-B

Abstract

The application discloses a high-tightness double-leaf butterfly valve applied to the field of butterfly valves, which is characterized in that abrasion is effectively reduced by improving the existing blades and valve seats, so that tightness is improved, the abrasion degree of the sealing surface can be effectively reduced by utilizing the stronger abrasion resistance of polyurethane elastic blade surfaces as the sealing surface of the high-tightness valve seats, gaps of the sealing surface can be effectively reduced by utilizing the elasticity of an elastic filling piece and a rubber filling layer, meanwhile, gaps of the sealing surface are further effectively reduced by utilizing the mutual magnetic attraction effect of a magnetic semi-ring II and a magnetic semi-ring I, in addition, sealing liquid is filled in the high-tightness blades, and when the high-tightness blades are closed, the sealing liquid is extruded by virtue of the repulsive effect of a permanent magnet block on a sliding plug, so that the high-tightness blades are further tightly contacted with the high-tightness valve seats, the tightness of the sealing surface of the blades and the valve seats is effectively improved when the high-tightness blades and the sealing surface is effectively reduced, and the abrasion of the sealing surface is effectively reduced, and the leakage of a blade closing medium is effectively prevented.

Inventors

  • HUANG PU
  • Zhang Tiemu
  • ZHAO HAIJUN
  • GUO YONG
  • LIN CHAN

Assignees

  • 吉泰阀门集团有限公司

Dates

Publication Date
20260512
Application Date
20231008

Claims (6)

  1. 1. The utility model provides a high leakproofness double-bladed butterfly valve, includes the butterfly valve body, the butterfly valve body includes valve body (1), its characterized in that, fixedly connected with blade roating seat (2) on the central line of valve body (1), and valve body (1) are located the equal fixedly connected with high seal disk seat (3) of both sides inner wall of blade roating seat (2), rotary groove (201) have all been seted up to both sides lateral wall of blade roating seat (2), and the interval has baffle (202) between two rotary grooves (201), two all rotate in rotary groove (201) be connected with high seal disk seat (3) matched high seal blade (4), and high seal disk seat (4) and high seal disk seat (3) contact surface are mutually magnetic attraction, high seal blade (4) are located the inside lateral wall of rotary groove (201) and fixedly connected with flexible sealing membrane between rotary groove (201) and the high seal disk seat (3), and two valve rod (5) run through respectively in rotary groove (201) and with high seal disk seat (4) upper end fixed blade (4), high seal disk seat (4) are close to arc-shaped seal disk seat (401) and arc-shaped seal disk seat (401) are equipped with, arc-shaped disk seat (401) are located, the inner wall of the polyurethane elastic leaf surface (402) is fixedly connected with a second magnetic half ring (403), and an elastic filling piece (404) is filled between the second magnetic half ring (403) and the groove wall of the arc-shaped convex groove; The inner wall of butterfly plate body (401) has seted up a plurality of equidistant smooth chambeies (405) of distribution, and the both ends of smooth chamber (405) communicate with arc tongue and rotary groove (201) respectively, the sealed sliding connection of inner wall in smooth chamber (405) has smooth stopper (406), and the inner wall of baffle (202) is fixed to be inlayed have permanent magnetism piece (6) that repel with smooth stopper (406), the one end that smooth stopper (406) is close to permanent magnetism piece (6) and the inner wall fixedly connected with many elasticity reset rope (407) in smooth chamber (405), inside and smooth intracavity of arc tongue still are filled with the sealing fluid.
  2. 2. The high-tightness double-leaf butterfly valve according to claim 1, wherein both the high-tightness valve seats (3) are fixedly connected with the leaf rotating seat (2), and the diameter of a circular structure formed by the two high-tightness valve seats (3) and the leaf rotating seat (2) is equal to the inner diameter of the valve body (1).
  3. 3. The high-tightness double-leaf butterfly valve according to claim 1, wherein the flexible sealing film and the side wall of the rotary groove (201), the upper end and the lower end of the high-sealing valve seat (3) and the side wall of the high-sealing blade (4) enclose a closed space, and the flexible sealing film is made of a polymer composite material.
  4. 4. The high-tightness double-leaf butterfly valve according to claim 1, wherein the high-tightness valve seat (3) comprises a seat body (301) and a polyurethane elastic bushing (302), the end parts of the seat body (301) and the polyurethane elastic bushing (302) are fixedly connected with a connecting plate (303), and the inner wall of the polyurethane elastic bushing (302) is fixedly connected with a first magnetic half ring (304) magnetically attracted with a second magnetic half ring (403).
  5. 5. The high-tightness double-leaf butterfly valve according to claim 4, wherein an arc-shaped groove is formed in the inner wall of the seat body (301), and a rubber filling layer (305) is filled in the arc-shaped groove.
  6. 6. The high-tightness double-leaf butterfly valve of claim 1, wherein the elastic filling member (404) is of a net structure, and the elastic filling member (404) is made of polyurethane elastic material.

Description

High leakproofness double-leaf butterfly valve Technical Field The application relates to the field of butterfly valves, in particular to a high-tightness double-leaf butterfly valve. Background The butterfly valve is also called as a flap valve, and is a valve which has a simple structure and can be used for opening and closing low-pressure pipeline media. The butterfly valve is divided into a single leaf and a double leaf, the single leaf butterfly valve is a middle shaft, a blade is driven to turn over by 90 degrees, the double leaf is a middle shaft or two shafts on two sides, the two blades are driven to turn over by 90 degrees, the double leaf butterfly valve is better than the single leaf butterfly valve in the aspect of controlling flow, but the sealing performance of the existing double leaf butterfly valve is poor, after the butterfly valve is closed, gaps become large due to abrasion of the blades and a valve seat, and therefore medium leakage is easy to cause. Therefore, the problem of poor sealing performance caused by abrasion of the existing double-leaf butterfly valve is solved through the technical scheme. Disclosure of Invention The application aims to improve a double-leaf butterfly valve in the prior art, and provides a high-tightness double-leaf butterfly valve compared with the prior art, wherein abrasion is effectively reduced by improving the prior blades and valve seats, so that the tightness is improved, the abrasion degree of the sealing surface can be effectively reduced by utilizing the stronger abrasion resistance of polyurethane elastic blade surfaces as the sealing surface of the high-tightness valve seats, the gap of the sealing surface is effectively reduced by utilizing the elasticity of an elastic filling piece and a rubber filling layer, so that the tightness is effectively improved, meanwhile, the gap of the sealing surface is further effectively reduced by utilizing the mutual magnetic attraction effect of a magnetic semi-ring II and a magnetic semi-ring I, in addition, sealing liquid is filled in the high-tightness blades, and the sealing liquid is extruded by virtue of the repulsive action of a permanent magnet block on a sliding plug after the high-tightness blades are closed, so that the high-tightness blades are further tightly contacted with the high-tightness valve seats, and the tightness of the sealing surface in a closed state is effectively improved. The high tightness of the vane and the valve seat sealing surface is realized, the abrasion of the sealing surface is effectively reduced, and the leakage of medium caused by the enlargement of gaps after the vane is closed is effectively prevented. Further, two high seal disk seats are all fixedly connected with the blade rotating seat, and the diameter of the circular structure formed by the two high seal disk seats and the blade rotating seat is equal to the inner diameter of the valve body, and the blade rotating seat and the high seal disk seat are installed on the valve body as a whole structure, so that interception of media is realized, and the blade rotating seat, the high seal disk seat and the valve body are connected together to avoid the generation of gaps, so that leakage of the media from the gaps is effectively prevented. Further, the side wall of flexible sealing film and rotary tank, the upper and lower ends of high seal disk seat, the lateral wall of high seal blade enclose into airtight space, and flexible sealing film adopts polymer composite material, and high seal blade has the gap when rotating in the rotary tank, and flexible sealing film's effect is just to seal the gap and prevent that the medium from permeating the gap and leaking out, in order not to influence high seal blade's rotation simultaneously, consequently adopts flexible sealing film to seal. Further, the high-sealing valve seat comprises a seat body and a polyurethane elastic bushing, the end parts of the seat body and the polyurethane elastic bushing are fixedly connected with a connecting plate, the inner wall of the polyurethane elastic bushing is fixedly connected with a first magnetic half ring which is magnetically attracted with a second magnetic half ring, the polyurethane elastic bushing and the polyurethane elastic leaf surface form a closure sealing surface, and the sealing surface and the closure sealing surface are strong in wear resistance, so that the wear resistance is effectively reduced, the gap is prevented from being enlarged, and the gap of the sealing surface is further reduced due to the mutual magnetic attraction of the first magnetic half ring and the second magnetic half ring, so that the sealing effect of the sealing surface is effectively improved. Further, the arc recess has been seted up to the inner wall of pedestal, and fills in the arc recess has the rubber filling layer, and the elasticity of rubber filling layer makes the more inseparable contact of polyurethane elasticity bush and polyur