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CN-115978208-B - Butterfly valve with good sealing performance

CN115978208BCN 115978208 BCN115978208 BCN 115978208BCN-115978208-B

Abstract

The application discloses a butterfly valve with good sealing performance, and belongs to the field of valves. The utility model provides a butterfly valve that leakproofness is good, includes the valve body, the valve rod is installed to the valve body rotatable formula, the valve rod is connected with the butterfly plate, the butterfly plate include the butterfly frame, connect in curb plate, sliding connection of butterfly frame cut off the board with connect in the butterfly frame with flexible coupling spare between the cut off the board, butterfly frame fixed connection in the valve rod, the valve body inner wall be provided with be used for with cut off the sealing washer of board butt, from being close to one side of butterfly plate to keeping away from one side of butterfly plate the internal diameter of sealing washer reduces gradually, the inside drive of butterfly frame cut off the board along the mobile mechanism of valve body axial displacement, the valve rod is provided with the guiding mechanism that is used for controlling the mobile mechanism operation. The application has the effect of improving the durability of the butterfly valve, thereby improving the sealing performance of the butterfly valve.

Inventors

  • WANG FULI
  • YANG ZHIZHONG
  • QIU XUDONG
  • GAN ZHIHUA

Assignees

  • 广东福斯特流体技术有限公司

Dates

Publication Date
20260508
Application Date
20221219

Claims (8)

  1. 1. The butterfly valve with good sealing performance comprises a valve body (1), and is characterized in that the valve body (1) is rotatably provided with a valve rod (2), the valve rod (2) is connected with a butterfly plate (3), the butterfly plate (3) comprises a butterfly frame (31), a side plate (32) connected with the butterfly frame (31), a stop plate (4) connected with the butterfly frame (31) in a sliding manner and a flexible connecting piece (33) connected between the butterfly frame (31) and the stop plate (4), the butterfly frame (31) is fixedly connected with the valve rod (2), a sealing ring (11) used for being abutted with the stop plate (4) is arranged on the inner wall of the valve body (1), the inner diameter of the sealing ring (11) is gradually reduced from one side close to the butterfly plate (3) to one side far away from the butterfly plate (3), a moving mechanism used for driving the stop plate (4) to axially move along the valve body (1) is arranged inside the butterfly frame (31), and an adjusting mechanism used for controlling the operation of the valve rod (2) is arranged; The moving mechanism comprises a rotating seat (5) and an eccentric cam (51) which are rotatably arranged on the butterfly frame (31), wherein the edges of the rotating seat (5) and the eccentric cam (51) are respectively provided with meshed engaging teeth (52), and the eccentric cam (51) is connected with the cutting-off plate (4); The adjusting mechanism comprises a control rod (21) penetrating through the valve rod (2), a fixed block (23) connected to the side wall of the control rod (21) and a transfer block (24) connected to the control rod (21), wherein the fixed block (23) and the transfer block (24) are polygonal blocks, a round groove (232) is formed in the valve rod (2) and a control groove (231) matched with the fixed block (23), and a transfer groove (241) matched with the transfer block (24) is formed in the rotating seat (5).
  2. 2. The butterfly valve with good sealing performance according to claim 1, wherein the fixed block (23) is clamped with the control groove (231), and the transfer block (24) is clamped with the transfer groove (241).
  3. 3. A butterfly valve with excellent sealing as claimed in claim 1, wherein the cross-sectional area of said circular groove (232) is larger than the cross-sectional area of said fixed block (23).
  4. 4. A butterfly valve with good sealing performance according to claim 1, wherein the flexible connecting piece (33) is a wavy extending annular sealing strip, and two sides of the sealing strip are respectively connected with the stop plate (4) and the butterfly frame (31).
  5. 5. The butterfly valve with good sealing performance according to claim 1, wherein the stop plate (4) comprises a fixed frame (41) connected to the flexible connecting piece (33) and a rotating baffle plate (42) rotatably connected to the fixed frame (41), the fixed frame (41) is slidably connected with a sliding block (54), the sliding block (54) is rotatably connected with the eccentric cam (51), the sliding block (54) and the rotating baffle plate (42) are respectively provided with meshing teeth (55) meshed with each other, the fixed frame (41) and the rotating baffle plate (42) are respectively abutted to the sealing ring (11), a plurality of embedded blocks (34) are arranged on one side surface of the rotating baffle plate (42) away from the valve rod (2), and the sealing ring (11) is provided with a plurality of embedded grooves clamped with the embedded blocks (34).
  6. 6. The butterfly valve with excellent sealing performance according to claim 5, wherein the fixed frame (41) is provided with a straight groove (53), and the slider (54) is slidably connected to the straight groove (53).
  7. 7. The butterfly valve with good sealing performance according to claim 1, wherein the valve rod (2) is provided with a limiting rod (6), and the stop plate (4) is provided with a limiting cylinder (61) sleeved on the limiting rod (6).
  8. 8. A butterfly valve with good sealing performance according to claim 1, wherein one end of the control rod (21) penetrates out of the valve rod (2) and is fixedly connected with a hand wheel (22).

Description

Butterfly valve with good sealing performance Technical Field The application relates to the field of valves, in particular to a butterfly valve with good sealing performance. Background Valves are common components in fluid technology and can control the flow and shut-off of various media in fluid lines, an integral component in the piping system. Valves are of various kinds, with butterfly valves being one of the many kinds of valves. The butterfly valve is also called as a flap valve, has wide application range, and can control gas, water, corrosive medium and liquid metal. The butterfly valve consists of a valve body, a valve rod, a butterfly plate and a sealing ring, the butterfly plate is driven to rotate by controlling the valve rod to rotate, and the butterfly plate can cover the inner section of the valve body, so that the butterfly valve plays a role in stopping pipeline media, and similarly, the flow of the pipeline media can be realized by rotating the butterfly plate without covering the inner section of the valve body. The butterfly valve can keep the cut-off state due to the fact that the butterfly plate is required to be abutted against the inner wall of the valve body, therefore when the butterfly plate rotates, the edge of the butterfly plate can be worn away from the inner wall of the valve body, and after the butterfly valve is used for a long time, the sealing performance of the butterfly valve is affected due to the fact that the butterfly plate is worn seriously, and therefore the durability is not high. Disclosure of Invention The application provides a butterfly valve with good sealing performance, which aims to improve the durability of the butterfly valve and improve the sealing performance of the butterfly valve. The butterfly valve with good sealing performance provided by the application adopts the following technical scheme: The utility model provides a butterfly valve that leakproofness is good, includes the valve body, the valve rod is installed to the valve body rotatable formula, the valve rod is connected with the butterfly plate, the butterfly plate include the butterfly frame, connect in curb plate, sliding connection of butterfly frame cut off the board with connect in the butterfly frame with flexible coupling spare between the cut off the board, butterfly frame fixed connection in the valve rod, the valve body inner wall be provided with be used for with cut off the sealing washer of board butt, from being close to one side of butterfly plate to keeping away from one side of butterfly plate the internal diameter of sealing washer reduces gradually, the inside drive of butterfly frame cut off the board along the mobile mechanism of valve body axial displacement, the valve rod is provided with the guiding mechanism that is used for controlling the mobile mechanism operation. Through the technical scheme, under the action of the moving mechanism, the stop plate can move relative to the butterfly frame, so that after the butterfly plate is in a state of covering the inner section of the valve body, the stop plate can further move to be abutted with the sealing ring, the change of the inner diameter of the sealing ring can adapt to the movement of the stop plate to realize the tight connection of the sealing ring and the stop plate, the sealing of the butterfly valve is realized, the flexible connecting piece can play a role in ensuring the integral sealing of the butterfly valve, and due to the adoption of a mode of rotating before completely sealing, a gap can be reserved between the stop plate and the inner wall of the valve body, the abrasion caused by the rotation of the stop plate is reduced, the durability of the butterfly valve is improved, and the sealing performance of the butterfly valve is further improved. Optionally, the moving mechanism includes rotatable install in rotation seat and the eccentric cam of butterfly frame, rotate the seat with the edge of eccentric cam all is provided with the interlock tooth of intermeshing, eccentric cam connect in cut the board. Through adopting above-mentioned technical scheme, control rotates the seat and rotates, and the accessible interlock tooth drives eccentric cam and rotates, because the axis of rotation eccentric cam eccentric setting, consequently can drive the shut-off plate that is connected with eccentric cam and remove, and then makes the shut-off plate be close to the sealing washer, realizes sealedly. Optionally, the guiding mechanism includes wears to locate the control rod of valve rod, connect in the fixed block of control rod lateral wall with connect in the transfer piece of control rod, the fixed block with the transfer piece is the polygon piece, the valve rod seted up the circular slot and with fixed block complex control groove, the rotation seat seted up with transfer piece complex transfer groove. By adopting the technical scheme, the position of the control rod is adjusted, so that the fixed blo