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CN-224229318-U - Double-diaphragm reinforced sealing diaphragm valve

CN224229318UCN 224229318 UCN224229318 UCN 224229318UCN-224229318-U

Abstract

The utility model relates to the technical field of valves, in particular to a double-diaphragm reinforced sealing diaphragm valve which comprises a valve body, a valve cover, a valve rod, a valve clack, a valve seat, a diaphragm sheet and an actuating mechanism, wherein the diaphragm sheet comprises a first diaphragm and a second diaphragm, the valve cover is connected with the valve body through a connecting piece, the connecting piece also penetrates through the first diaphragm to be connected with the valve body, the edge of the second diaphragm is abutted with the side wall of the connecting piece, the edge of the second diaphragm is also protruded with a flange, and the valve cover is recessed with a ring groove matched with the flange.

Inventors

  • CHEN PAN
  • YU KAIDI
  • Ge Zhiqian
  • LI CHAOHE
  • LI CHAOHUI

Assignees

  • 浙江艾米流体科技有限公司

Dates

Publication Date
20260512
Application Date
20250624

Claims (7)

  1. 1. The double-diaphragm reinforced sealing type diaphragm valve comprises a valve body (1), a valve cover (2), a valve rod (3), a valve clack (4), a valve seat (5), a diaphragm sheet and an actuating mechanism (6), wherein the valve cover (2) is arranged at one end of the valve body (1), the edge of the diaphragm sheet is clamped between the valve cover (2) and the valve body (1), the diaphragm sheet is connected with the valve clack (4) through a fastener (7), the valve seat (5) is arranged in the valve body (1) and is used for being in sealing fit with the diaphragm sheet, the actuating mechanism (6) drives the valve rod (3) and the valve clack (4) to reciprocate, the double-diaphragm reinforced sealing type diaphragm valve is characterized in that the diaphragm sheet comprises a first diaphragm (8) and a second diaphragm (9), the valve cover (2) is connected with the valve body (1) through a connecting piece (10), the connecting piece (10) further penetrates through the first diaphragm (8) to be connected with the valve body (1), the edge of the second diaphragm (9) is in butt joint with the side wall of the connecting piece (10), the edge of the second diaphragm sheet is further provided with a flange (11) in a protruding mode, and the flange (2) is further provided with a flange (11) to be matched with the annular groove (12).
  2. 2. The double-diaphragm reinforced sealing diaphragm valve of claim 1, wherein the valve body (1) is provided with a locking piece (13) for connecting the connecting piece (10), the connecting piece (10) comprises a first threaded section (14), a polished rod section (15) and a second threaded section (16) which are sequentially arranged, when the valve cover (2) is fixedly arranged on the valve body (1), the first threaded section (14) is in threaded connection with the valve cover (2), the polished rod section (15) penetrates through the edge of the first diaphragm (8), the edge of the second diaphragm (9) is in butt joint with the side wall of the polished rod section (15), and the second threaded section (16) is in threaded connection with the locking piece (13).
  3. 3. The double-diaphragm reinforced sealing diaphragm valve of claim 1, wherein the valve seat (5) is further provided with a U-shaped diaphragm (17), two ends of the U-shaped diaphragm (17) are connected with the valve seat (5) in an interference fit manner, and a buffer cavity (18) is formed between the middle part of the U-shaped diaphragm (17) and the valve seat (5).
  4. 4. The double-diaphragm reinforced sealing diaphragm valve of claim 1, wherein an abutting convex part (19) is arranged on one side, close to the valve clack (4), of the second diaphragm (9), at least two groups of diaphragm pressing assemblies are further arranged on the valve clack (4), the two groups of diaphragm pressing assemblies are evenly distributed around the abutting convex part (19), the diaphragm pressing assemblies comprise a pressing plate (20) and a rotating shaft (21), the pressing plate (20) is rotatably arranged on the valve clack (4) through the rotating shaft (21), and when the valve clack (4) is closed, the pressing plate (20) presses down the part, corresponding to the side part of the abutting convex part (19), of the second diaphragm (9).
  5. 5. The double-diaphragm reinforced sealing diaphragm valve of claim 4, wherein the valve clack (4) is provided with a connecting groove (22) into which the abutting convex part (19) extends, the rotating shaft (21) is also arranged at the inner periphery of the connecting groove (22), one side end surface of the pressing plate (20) close to the second diaphragm (9) is a contact surface (23), and the contact surface (23) and the end surface of the valve clack (4) are in a coherent cambered surface.
  6. 6. The double diaphragm reinforced sealing diaphragm valve of claim 4, wherein the diaphragm pressing assembly further comprises an elastic piece (24), the valve clack (4) is provided with a mounting groove (25) into which the elastic piece (24) stretches, one end of the elastic piece (24) is abutted with the inner wall of the mounting groove (25), and the other end of the elastic piece is abutted with one end of the pressing plate (20) far away from the rotating shaft (21).
  7. 7. The double-diaphragm reinforced sealing diaphragm valve of claim 6, wherein the inner wall of the mounting groove (25) is further provided with a limiting rod (26) for the elastic element (24) to be sleeved outside, the end face of one end of the pressing plate (20) far away from the rotating shaft (21) is provided with a ring table (27), a limiting groove (28) for the end part of the elastic element (24) to extend into is formed in the ring table (27), and when the pressing plate (20) rotates to be attached to the valve clack (4), the ring table (27) extends into the mounting groove (25).

Description

Double-diaphragm reinforced sealing diaphragm valve Technical Field The utility model relates to the technical field of valves, in particular to a double-diaphragm reinforced sealing diaphragm valve. Background The diaphragm valve is a stop valve which uses a diaphragm as a start-stop piece to seal a flow passage and cut off fluid and separate the inner cavity of the valve body from the inner cavity of the valve cover, the diaphragm is made of elastic, corrosion-resistant and non-permeable materials such as rubber, plastic and the like, the valve body is made of plastic, glass fiber reinforced plastic, ceramic or metal rubber lining materials, the structure is simple, the sealing and corrosion-resistant performances are good, the fluid resistance is small, and the valve is used for low-pressure, low-temperature, high-corrosivity and medium containing suspended substances. The diaphragm valve in the prior art has the problem of poor sealing performance, and the diaphragm and the valve seat cannot form effective sealing fit when the valve clack is closed, and particularly, in the closing process of the valve clack, the part of the diaphragm, which is not contacted with the valve clack, is arched, so that the diaphragm cannot be completely deformed in place, and leakage gaps are generated between the diaphragm and the valve seat. The object of the present utility model is to propose a corresponding solution to the technical problem described above. Disclosure of utility model The utility model aims to overcome the defects and shortcomings of the prior art and provide a double-diaphragm reinforced sealing diaphragm valve, which improves the sealing performance by a structure provided with double diaphragms, the deformation capacity of the double diaphragms is stronger, and the parts of the diaphragms which are not contacted with the valve clack can also deform together with the whole of the diaphragms, so that the diaphragms and the valve seat form closer sealing fit. The technical scheme includes that the double-diaphragm reinforced sealing type diaphragm valve comprises a valve body, a valve cover, a valve rod, a valve clack, a valve seat, a diaphragm sheet and an actuating mechanism, wherein the valve cover is arranged at one end of the valve body, the edge of the diaphragm sheet is clamped between the valve cover and the valve body, the diaphragm sheet is connected with the valve clack through a fastener, the valve seat is arranged in the valve body and is used for being in sealing fit with the diaphragm sheet, the actuating mechanism drives the valve rod and the valve clack to reciprocate, the diaphragm sheet comprises a first diaphragm and a second diaphragm, the valve cover is connected with the valve body through a connecting piece, the connecting piece is connected with the valve body through the first diaphragm, the edge of the second diaphragm is abutted against the side wall of the connecting piece, a flange is further protruded at the edge of the second diaphragm, and a ring groove matched with the flange is sunken in the valve cover. The valve body is provided with a locking piece for connecting the connecting piece, the connecting piece comprises a first threaded section, a polish rod section and a second threaded section which are sequentially arranged, the first threaded section is in threaded connection with the valve cover when the valve cover is fixedly arranged on the valve body, the polish rod section penetrates through the edge of the first diaphragm, the edge of the second diaphragm is in butt joint with the side wall of the polish rod section, and the second threaded section is in threaded connection with the locking piece. The valve seat is also provided with a U-shaped film, both ends of the U-shaped film are connected with the valve seat in an interference fit manner in a plug-in connection manner, and a buffer cavity is formed between the middle part of the U-shaped film and the valve seat. The second diaphragm is close to the protruding butt convex part that has in one side of valve clack, still be equipped with two at least groups of press mold components on the valve clack, two groups press mold components encircles butt convex part evenly distributed, press mold components includes clamp plate and pivot, the clamp plate passes through the pivot rotation setting on the valve clack, when the valve clack is closed the clamp plate pushes down the position that the second diaphragm corresponds butt convex part lateral part. The valve clack is provided with a connecting groove for the butt convex part to extend in, the rotating shaft is also arranged at the inner periphery of the connecting groove, one side end face of the pressing plate, which is close to the second diaphragm, is a contact surface, and the contact surface and the end face of the valve clack are in a coherent cambered surface. The film pressing assembly further comprises an elastic piece, the valve clack is provided w