Search

CN-118775558-B - Three-eccentric butterfly valve capable of being sealed in two directions

CN118775558BCN 118775558 BCN118775558 BCN 118775558BCN-118775558-B

Abstract

The invention discloses a three-eccentric butterfly valve capable of being sealed in two directions, which belongs to the technical field of three-eccentric butterfly valves and comprises a butterfly valve body, a sliding pin shaft and a linkage assembly, wherein a water contact disc in the linkage assembly is arranged to face a water flow direction, the water contact disc is enabled to move towards a driving connecting shaft through water pressure, and two sides of the water contact disc are matched with two sides of the linkage assembly to enable two sides of the sliding pin shaft to move outwards in the sliding boss, so that the end parts of the two sides of the sliding pin shaft are enabled to contact the inner wall of the butterfly valve body, a first reset spring is stressed and contracted, a sealing disc is enabled to be more stable in the butterfly valve body through friction force between the end parts of the sliding pin shaft and the inner wall of the butterfly valve body, the sealing disc can still keep sealing on water after the driving connecting shaft loosens, the contact area of a concave surface in the water contact disc is larger, and the influence of the water contact disc on flow can be reduced through each water penetration hole when the sealing disc is opened through the arrangement of a plurality of water penetration holes.

Inventors

  • JIA DONGDONG
  • LI ZHI
  • PENG PENG
  • ZHU ZHIQIANG

Assignees

  • 天津卡尔斯阀门股份有限公司

Dates

Publication Date
20260508
Application Date
20240805

Claims (7)

  1. 1. The utility model provides a can two-way sealed three eccentric butterfly valve, including butterfly valve body (100), butterfly valve body (100) both sides outer wall fixedly connected with flange dish (101), butterfly valve body (100) are close to the outer wall of upper end and are installed transmission housing (103), butterfly valve body (100) inside center department rotates and is connected with drive connecting axle (105), drive connecting axle (105) upper end wear out butterfly valve body (100) and with transmission housing (103) detachable connection, transmission housing (103) outer wall rotation is connected with regulating hand wheel (104), drive connecting axle (105) outer wall detachable connection has sealed dish (102), characterized in that, sealed dish (102) are close to drive connecting axle (105) outer wall both sides fixedly connected with sliding boss (205), sliding connection has sliding pin (202) on both sides sliding boss (205), install the link assembly on both sides sliding pin (202), the link assembly makes both sides sliding pin (202) outwards remove simultaneously; Mounting cylinder sleeves (214) are embedded in two sides of the inner wall of the butterfly valve body (100), first piston blocks (210) are slidably connected in the two side mounting cylinder sleeves (214), sealing bosses (209) are fixedly connected to the outer walls of opposite surfaces of the first piston blocks (210) on two sides, the sealing bosses (209) on two sides penetrate out of the inner wall of the butterfly valve body (100), a second reset spring (212) is arranged between the first piston blocks (210) and the inner parts of the mounting cylinder sleeves (214), unlocking components are mounted on the outer walls of the two sides of the butterfly valve body (100), and the sealing bosses (209) and the first piston blocks (210) are reset by the unlocking components; The unlocking component comprises an electric telescopic rod (300) and a reset disc (301), the electric telescopic rod (300) is detachably connected to the outer walls of the two sides of the butterfly valve body (100), a penetrating sealing boss (209) is arranged at the position, close to the outer wall of the butterfly valve body (100), of the two side mounting cylinder sleeve (214), and the telescopic ends of the two side electric telescopic rods (300) penetrate through the sealing boss (209) to reach the inside of the mounting cylinder sleeve (214).
  2. 2. The bi-directional sealable triple offset butterfly valve of claim 1 wherein the outer wall of the sealing disk (102) remote from the water-contacting disk (200) is fixedly connected with a water diversion tip (207).
  3. 3. The bi-directional sealing triple offset butterfly valve according to claim 1, wherein sealing bosses (209) are arranged on two sides of the two-side mounting cylinder sleeve (214), second piston blocks (213) are slidably connected to the inside of the two-side sealing cavity (208), limiting blocks (215) penetrating through the inner wall of the butterfly valve body (100) are fixedly connected to the outer walls of each two opposite second piston blocks (213), and through holes (211) are formed between the mounting cylinder sleeve (214) and the sealing bosses (209).
  4. 4. The bi-directional sealing triple offset butterfly valve according to claim 3, wherein the linkage assembly comprises a water contact disc (200), a linkage driving plate (201) and a first reset spring (204), the opposite surfaces of the two side sealing discs (102) are rotationally connected with a first piston block (210), the tail ends of the two side linkage driving plates (201) are rotationally connected with the water contact disc (200), the outer walls of the two side sliding pin shafts (202) are fixedly connected with limiting bosses (203), and the first reset spring (204) is arranged between the two side limiting bosses (203) and the sliding bosses (205).
  5. 5. The bi-directional sealable triple offset butterfly valve of claim 4 wherein the water contact disc (200) is concave towards the outer wall of the water flow.
  6. 6. The bi-directional sealable triple offset butterfly valve of claim 5 wherein the water-contacting disk (200) is provided with a plurality of water-permeable apertures (206) adjacent the outer wall of the sealing disk (102), each water-permeable aperture (206) extending through the water-contacting disk (200).
  7. 7. The bi-directional sealable triple offset butterfly valve of claim 1 wherein the telescoping ends of the two-sided motorized telescoping rod (300) are detachably connected with a reset disc (301).

Description

Three-eccentric butterfly valve capable of being sealed in two directions Technical Field The invention belongs to the technical field of triple offset butterfly valves, and particularly relates to a double-seal triple offset butterfly valve. Background The butterfly valve is also called as a flap valve, and is a regulating valve with simple structure, and the butterfly valve opening and closing piece is a disc-shaped butterfly plate, so that the purpose of opening, closing or regulating the medium flow is achieved by rotating the butterfly plate around a corresponding axis in the valve body. The butterfly valve has the advantages of simple structure, small volume, light weight, material consumption saving, small installation size, small driving moment, simple and rapid operation, good flow regulation function and sealing closing property, and is one of the fastest-developing valve varieties in more than ten years. The three-eccentric butterfly valve is characterized in that the three-eccentric butterfly valve is of a three-eccentric structure, the first eccentric means that an eccentric dimension, namely axial eccentric, is arranged between a valve rod axis and a radial sealing surface of a butterfly plate, the second eccentric means that an eccentric dimension, namely radial eccentric, is arranged between the valve rod axis and a channel axis of a valve body, the third eccentric means that an inclined cone angle, namely angle eccentric, is formed between a valve seat seal and the channel axis of the valve body, and the butterfly plate is generally a right-angle inclined cone frustum with the outer peripheral surface being an inclined cone frustum curved surface due to the existence of the angle eccentric. As disclosed in chinese patent No. 115264087a, a triple eccentric butterfly valve capable of bidirectional sealing is disclosed, which comprises a valve body, wherein a valve shaft and a butterfly plate are arranged in the valve body, the valve shaft is eccentrically arranged on the bottom surface of the butterfly plate, the projection of the axis of the valve shaft on the butterfly plate divides the butterfly plate into a first plate and a second plate, the sealing assembly comprises a fixed valve seat and a movable valve seat, the area of the first plate on one side of the butterfly plate, which is far away from the valve shaft, is larger than the area of the second plate, the area of the end surface of the movable valve seat, which is far away from the valve shaft, is larger than the difference between the areas of the first plate and the second plate on one side of the butterfly plate, which is far away from the valve shaft, and when in use, the movable valve seat can push the butterfly plate which deflects by a small angle, so that the butterfly plate is reset, and then the movable sealing ring on the fixed valve seat keeps sealing with the movable sealing ring, and the inner wall surface of the movable valve seat keeps sealing, thereby the situation that liquid leakage is not easy to occur. The above-mentioned prior art can make the leakproofness better, but if produce not hard up between valve shaft and the dish board, then make the dish board rotate under the impact force of pipeline inside water pressure for there is the gap between dish board and the valve body, thereby make the outside leakage of water in the water pipe. Disclosure of Invention This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application. In order to solve the problem that looseness is generated between the valve shaft and the disc plate, which is proposed in the background art, the disc plate rotates under the impact force of the water pressure in the pipeline, so that a gap exists between the disc plate and the valve body, and water in the water pipe is leaked outwards, the invention adopts the following technical scheme. The utility model provides a can two-way sealed three eccentric butterfly valve, including the butterfly valve body, the both sides outer wall fixedly connected with flange dish of butterfly valve body, the transmission casing is installed to the outer wall that the butterfly valve body is close to the upper end, the inside center department of butterfly valve body rotates and is connected with the drive connecting axle, the upper end of drive connecting axle wears out the butterfly valve body and can dismantle with the transmission casing and be connected, the outer wall of transmission casing rotates and is connected with the regulating hand wheel, the outer wall of drive connecting axle can dismantle and be connected with sealed dish, a serial communication port, sealed dish is close to the outer wall both sides fixedly connec