CN114738502A - Steam pipeline butterfly valve with pressure release function - Google Patents

Steam pipeline butterfly valve with pressure release function Download PDF

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Publication number
CN114738502A
CN114738502A CN202210457841.XA CN202210457841A CN114738502A CN 114738502 A CN114738502 A CN 114738502A CN 202210457841 A CN202210457841 A CN 202210457841A CN 114738502 A CN114738502 A CN 114738502A
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CN
China
Prior art keywords
butterfly valve
rectangular box
fixedly connected
plate
pressure relief
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202210457841.XA
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Chinese (zh)
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CN114738502B (en
Inventor
夏胜建
张晓忠
黄晓云
张晓秋
戴雄浩
张渊
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Baoyi Group Co ltd
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Baoyi Group Co ltd
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Publication date
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Priority to CN202210457841.XA priority Critical patent/CN114738502B/en
Publication of CN114738502A publication Critical patent/CN114738502A/en
Application granted granted Critical
Publication of CN114738502B publication Critical patent/CN114738502B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/226—Shaping or arrangements of the sealing
    • F16K1/2261—Shaping or arrangements of the sealing the sealing being arranged on the valve member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves
    • F16K27/0218—Butterfly valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/60—Handles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
    • F16L23/036—Flanged joints the flanges being connected by members tensioned axially characterised by the tensioning members, e.g. specially adapted bolts or C-clamps

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Fluid Pressure (AREA)
  • Lift Valve (AREA)

Abstract

The invention belongs to the field of butterfly valves, in particular to a steam pipeline butterfly valve with a pressure relief function, which aims at solving the problems that when the existing butterfly valve is used, the pressure in a pipeline is increased, if the pressure is not released in time, the pipeline is easy to break, the gas leaks and the like, and a large amount of time is consumed for maintenance, so that the working efficiency is greatly reduced, the invention provides the following scheme, which comprises a butterfly valve body, wherein two ends of the butterfly valve body are fixedly communicated with connecting pipes, the top of the butterfly valve body is fixedly connected with a second rectangular box, and the inner wall of the second rectangular box is connected with a sliding block in a sliding way. The working efficiency is improved.

Description

Steam pipeline butterfly valve with pressure release function
Technical Field
The invention relates to the technical field of butterfly valves, in particular to a steam pipeline butterfly valve with a pressure relief function.
Background
A butterfly valve, also called a flap valve, is a regulating valve with a simple structure, and can be used for on-off control of low-pressure pipeline media, namely a valve with a closing part (a valve clack or a butterfly plate) which is a disc and rotates around a valve shaft to open and close, and the valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. The pipe mainly plays a role in cutting off and throttling. The butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly plate in the valve body, so that the opening and closing or adjusting purpose is achieved.
When the existing butterfly valve is used, the situation that air pressure in a pipeline is increased may occur, if the situation that the pipeline is broken and air leaks is easily caused due to untimely pressure relief, a large amount of time is consumed for maintenance, and the working efficiency is greatly reduced, so that the steam pipeline butterfly valve with the pressure relief function is provided.
Disclosure of Invention
The invention aims to solve the defects that in the prior art, when a butterfly valve is used, the pressure in a pipeline is increased, if the pressure is not released in time, the pipeline is easy to break, the gas leaks and the like, a large amount of time is consumed for maintenance, and the working efficiency is greatly reduced, and provides a steam pipeline butterfly valve with a pressure release function.
In order to achieve the purpose, the invention adopts the following technical scheme:
a steam pipeline butterfly valve with a pressure relief function comprises a butterfly valve body, wherein connecting pipes are fixedly communicated with two ends of the butterfly valve body, a second rectangular box is fixedly connected to the top of the butterfly valve body, a sliding block is connected to the inner wall of the second rectangular box in a sliding mode, a rotating shaft penetrates through the inner wall of the sliding block in a rotating mode, the top of the rotating shaft penetrates through the second rectangular box and is fixedly connected with a handle, a fixed cylinder is sleeved on the outer wall of the rotating shaft in a sliding mode, a valve clack matched with the butterfly valve body in use is fixedly connected to one side of the fixed cylinder, and a fixing assembly used for fixing the sliding block is arranged on one side of the second rectangular box;
the bottom of the butterfly valve body is fixedly connected with a first rectangular box, the top of the first rectangular box is provided with two vent holes communicated with the butterfly valve body, and the inner wall of the top of the first rectangular box is provided with a first pressure relief assembly for pressure relief;
and a second pressure relief assembly for pressure relief is arranged in the first rectangular box.
Preferably, fixed subassembly runs through the three flange in second rectangle box one side including sliding, the fixed cover of outer wall of flange is equipped with the fixed block, the same second spring of fixedly connected with between one side of fixed block and one side inner wall of second rectangle box, the one end fixedly connected with limiting plate of flange, the same first spring of fixedly connected with between the bottom of sliding block and the bottom inner wall of second rectangle box, first spring housing is established in the pivot, the draw-in groove with flange looks block is seted up to one side of sliding block for fixed sliding block.
Preferably, first pressure release subassembly includes two rectangular plates that fixed connection set up at first rectangle box top inner wall symmetry, two the same bull stick of fixedly connected with between the rectangular plate, the outer wall of bull stick rotates the cover and is equipped with the commentaries on classics board, the same torsional spring of fixedly connected with between commentaries on classics board and the rectangular plate, the torsional spring cover is established on the bull stick, the circular slot has been seted up to the bottom of commentaries on classics board, the outer wall of pivot rotates and is connected with the L type pole with circular slot looks block for realize the pressure release function.
Preferably, the second pressure relief assembly comprises a transverse plate fixedly connected to the inner wall of the first rectangular box, an air outlet is formed in the transverse plate, a circular plate matched with the air outlet is fixedly connected to the bottom of the rotating shaft, and an auxiliary pipe is fixedly communicated with the bottom of the first rectangular box and used for pressure relief once again.
Preferably, the top of commentaries on classics board is provided with the rubber pad, promotes the leakproofness.
Preferably, a side plate is fixedly connected to one side of the second rectangular box, a first sliding plate is slidably connected to one side of the side plate, the first sliding plate is slidably sleeved on the outer walls of the three convex plates, and two symmetrically arranged tension springs are fixedly connected between one side of the first sliding plate and one side of the second rectangular box, so that the device is restored to an initial position.
Preferably, the butterfly valve body and the connecting pipe are fixedly connected through a flange, and the tightness of the device is improved.
Preferably, the top of the circular plate is arranged obliquely, so that air exhaust is facilitated.
Compared with the prior art, the invention has the beneficial effects that:
1. the handle is normally rotated, the handle drives the rotating shaft to rotate, the rotating shaft drives the fixed cylinder to rotate, and the fixed cylinder drives the valve clack to rotate, so that the normal opening and closing functions of the valve can be realized;
2. when the gas pressure is large, the handle is pressed vertically downwards, the handle drives the rotating shaft and the sliding block to move vertically downwards and extrude the first spring, the sliding block is clamped with the second convex plate at the moment, meanwhile, the rotating shaft drives the circular plate and the L-shaped rod to move vertically downwards, the circular plate blocks the gas outlet, and meanwhile, the L-shaped rod is not clamped with the circular groove any more;
3. when pressure resumes the increase again, vertical downward pressing handle once more, make sliding block and third flange block, the below that the plectane got into the diaphragm this moment, unnecessary air current passes through the auxiliary tube and discharges, and then reduce the pipeline internal pressure, avoid the pipeline damaged, high durability and convenient use, when needs resume the device to initial position, horizontal pulling first sliding plate, the tensile extension spring of first sliding plate drives three limiting plate lateral shifting, the limiting plate drives three flange lateral shifting, and then the sliding block can resume to initial position under the spring action of first spring, be convenient for use next time.
According to the invention, the pressure relief function can be realized when the air pressure in the pipeline is increased by arranging the first pressure relief assembly, and the device is protected by the second pressure relief assembly when the air pressure is increased to exceed the threshold value, so that the device is prevented from being damaged, meanwhile, the cost and time brought by maintenance are greatly saved, the working efficiency is improved, and the use is convenient.
Drawings
Fig. 1 is a schematic front view of a steam pipeline butterfly valve with a pressure relief function according to the present invention;
FIG. 2 is a schematic view of the structure of the spindle and the handle of the present invention;
FIG. 3 is a schematic three-dimensional cross-sectional view of a second rectangular box according to the present invention;
FIG. 4 is a schematic three-dimensional structure of the convex plate of the present invention;
FIG. 5 is a schematic three-dimensional structure of a first rectangular box according to the present invention;
FIG. 6 is a schematic three-dimensional cross-sectional structural view of a first rectangular box according to the present invention;
fig. 7 is a schematic structural view of the rotating plate of the present invention.
In the figure: 1. a connecting pipe; 2. a flange; 3. a first rectangular box; 4. an auxiliary tube; 5. a first sliding plate; 6. a limiting plate; 7. a rotating shaft; 8. a handle; 9. a second rectangular box; 10. a butterfly valve body; 11. a fixed cylinder; 12. a valve flap; 13. a slider; 14. a first spring; 15. a fixed block; 16. a second spring; 17. a tension spring; 18. a side plate; 19. a convex plate; 20. a card slot; 21. a vent hole; 22. a rubber pad; 23. rotating the plate; 24. an air outlet; 25. a circular plate; 26. an L-shaped rod; 27. a transverse plate; 28. a circular groove; 29. a torsion spring; 30. a rotating rod; 31. a rectangular plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example one
Referring to fig. 1-7, a steam pipeline butterfly valve with a pressure relief function comprises a butterfly valve body 10, wherein two ends of the butterfly valve body 10 are fixedly communicated with a connecting pipe 1, the top of the butterfly valve body 10 is fixedly connected with a second rectangular box 9, the inner wall of the second rectangular box 9 is connected with a sliding block 13 in a sliding manner, the inner wall of the sliding block 13 is rotatably penetrated with a rotating shaft 7, the top of the rotating shaft 7 is penetrated with the second rectangular box 9 and is fixedly connected with a handle 8, the outer wall of the rotating shaft 7 is slidably sleeved with a fixed cylinder 11, one side of the fixed cylinder 11 is fixedly connected with a valve flap 12 matched with the butterfly valve body 10, and one side of the second rectangular box 9 is provided with a fixing component for fixing the sliding block 13;
the bottom of the butterfly valve body 10 is fixedly connected with a first rectangular box 3, the top of the first rectangular box 3 is provided with two vent holes 21 communicated with the butterfly valve body 10, and the inner wall of the top of the first rectangular box 3 is provided with a first pressure relief assembly for pressure relief;
a second pressure relief assembly for pressure relief is arranged inside the first rectangular box 3.
Example two
Referring to fig. 1-7, a steam pipeline butterfly valve with pressure relief function comprises a butterfly valve body 10, wherein two ends of the butterfly valve body 10 are fixedly communicated with a connecting pipe 1, the top of the butterfly valve body 10 is fixedly connected with a second rectangular box 9, the inner wall of the second rectangular box 9 is connected with a sliding block 13 in a sliding manner, the inner wall of the sliding block 13 is rotatably penetrated with a rotating shaft 7, the top of the rotating shaft 7 is penetrated with the second rectangular box 9 and is fixedly connected with a handle 8, the outer wall of the rotating shaft 7 is slidably sleeved with a fixed cylinder 11, one side of the fixed cylinder 11 is fixedly connected with a valve flap 12 matched with the butterfly valve body 10, one side of the second rectangular box 9 is provided with a fixed component for fixing the sliding block 13, the fixed component comprises three convex plates 19 slidably penetrated at one side of the second rectangular box 9, the outer wall of the convex plates 19 is fixedly sleeved with a fixed block 15, and the same second spring 16 is fixedly connected between one side of the fixed block 15 and the inner wall of the second rectangular box 9, one end of the convex plate 19 is fixedly connected with a limiting plate 6, the same first spring 14 is fixedly connected between the bottom of the sliding block 13 and the inner wall of the bottom of the second rectangular box 9, the first spring 14 is sleeved on the rotating shaft 7, and one side of the sliding block 13 is provided with a clamping groove 20 which is clamped with the convex plate 19 and used for fixing the sliding block 13;
the bottom of the butterfly valve body 10 is fixedly connected with a first rectangular box 3, the top of the first rectangular box 3 is provided with two vent holes 21 communicated with the butterfly valve body 10, the inner wall of the top of the first rectangular box 3 is provided with a first pressure relief assembly for pressure relief, the first pressure relief assembly comprises two rectangular plates 31 which are fixedly connected with the inner wall of the top of the first rectangular box 3 and symmetrically arranged, the same rotating rod 30 is fixedly connected between the two rectangular plates 31, the rotating plate 23 is sleeved on the outer wall of the rotating rod 30 in a rotating mode, the same torsion spring 29 is fixedly connected between the rotating plate 23 and the rectangular plates 31, the torsion spring 29 is sleeved on the rotating rod 30, the bottom of the rotating plate 23 is provided with a circular groove 28, the outer wall of the rotating shaft 7 is rotatably connected with an L-shaped rod 26 clamped with the circular groove 28, and the pressure relief function is achieved;
a second pressure relief component for pressure relief is arranged in the first rectangular box 3, the second pressure relief component comprises a transverse plate 27 fixedly connected to the inner wall of the first rectangular box 3, an air outlet 24 is formed in the transverse plate 27, a circular plate 25 matched with the air outlet 24 for use is fixedly connected to the bottom of the rotating shaft 7, an auxiliary pipe 4 is fixedly communicated with the bottom of the first rectangular box 3 for pressure relief again, a rubber pad 22 is arranged at the top of the rotating plate 23 for improving the sealing property, a side plate 18 is fixedly connected to one side of the second rectangular box 9, a first sliding plate 5 is slidably connected to one side of the side plate 18, the first sliding plate 5 is slidably sleeved on the outer wall of the three convex plates 19, two symmetrically arranged tension springs 17 are fixedly connected between one side of the first sliding plate 5 and one side of the second rectangular box 9 for restoring the device to the initial position, and the butterfly valve body 10 is fixedly connected with the connecting pipe 1 through a flange 2, the sealing performance of the lifting device is improved, and the top of the circular plate 25 is obliquely arranged, so that the exhaust is facilitated.
The working principle is as follows: when the valve is used, the handle 8 is normally rotated, the handle 8 drives the rotating shaft 7 to rotate, the rotating shaft 7 drives the fixed cylinder 11 to rotate, the fixed cylinder 11 drives the valve clack 12 to rotate, and further, the normal opening and closing functions of the valve can be realized, when the gas pressure is high, the handle 8 is vertically pressed downwards, the handle 8 drives the rotating shaft 7 and the sliding block 13 to vertically move downwards and extrude the first spring 14, at the moment, the sliding block 13 is clamped with the second convex plate 19, the rotating shaft 7 drives the circular plate 25 and the L-shaped rod 26 to vertically move downwards, the circular plate 25 blocks the gas outlet 24, the L-shaped rod 26 is not clamped with the circular groove 28 any more, as the rotating plate 23 is arranged on one side of gas inlet, excessive gas flow rotates by pushing the rotating plate 23, the rotating plate 23 twists the torsion spring 29 and enables the gas to be discharged through another vent hole 21, so as to reduce the pressure inside the pipeline, when the pressure is increased again, the handle 8 is vertically pressed downwards again, make sliding block 13 and third flange 19 block, the below that the plectane 25 got into diaphragm 27 this moment, unnecessary air current passes through auxiliary tube 4 and discharges, and then reduce the pipeline internal pressure, avoid the pipeline damaged, high durability and convenient use, when needs resume the device to initial position, transversely stimulate first sliding plate 5, the tensile extension spring 17 of first sliding plate 5 drives three limiting plate 6 lateral shifting, limiting plate 6 drives three flange 19 lateral shifting, and then sliding block 13 can resume to initial position under the spring action of first spring 14, be convenient for use next time.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.

Claims (8)

1. The steam pipeline butterfly valve with the pressure relief function comprises a butterfly valve body (10) and is characterized in that two ends of the butterfly valve body (10) are fixedly communicated with a connecting pipe (1), the top of the butterfly valve body (10) is fixedly connected with a second rectangular box (9), the inner wall of the second rectangular box (9) is connected with a sliding block (13) in a sliding mode, the inner wall of the sliding block (13) is rotatably penetrated with a rotating shaft (7), the top of the rotating shaft (7) penetrates through the second rectangular box (9) and is fixedly connected with a handle (8), the outer wall of the rotating shaft (7) is sleeved with a fixing cylinder (11) in a sliding mode, one side of the fixing cylinder (11) is fixedly connected with a valve clack (12) matched with the butterfly valve body (10) for use, and one side of the second rectangular box (9) is provided with a fixing component used for fixing the sliding block (13);
the bottom of the butterfly valve body (10) is fixedly connected with a first rectangular box (3), the top of the first rectangular box (3) is provided with two vent holes (21) communicated with the butterfly valve body (10), and the inner wall of the top of the first rectangular box (3) is provided with a first pressure relief assembly for pressure relief;
and a second pressure relief assembly for pressure relief is arranged in the first rectangular box (3).
2. The steam pipeline butterfly valve with the pressure relief function according to claim 1, wherein the fixing component comprises three convex plates (19) which slidably penetrate through one side of the second rectangular box (9), a fixing block (15) is fixedly sleeved on the outer wall of each convex plate (19), one same second spring (16) is fixedly connected between one side of each fixing block (15) and one inner wall of one side of the second rectangular box (9), one end of each convex plate (19) is fixedly connected with a limiting plate (6), one same first spring (14) is fixedly connected between the bottom of each sliding block (13) and the inner wall of the bottom of the second rectangular box (9), the first spring (14) is sleeved on the rotating shaft (7), and one side of each sliding block (13) is provided with a clamping groove (20) which is clamped with the corresponding convex plate (19).
3. The steam pipeline butterfly valve with the pressure relief function according to claim 1, wherein the first pressure relief assembly comprises two rectangular plates (31) which are symmetrically arranged on the inner wall of the top of the first rectangular box (3), the two rectangular plates (31) are fixedly connected with one rotating rod (30), the outer wall of the rotating rod (30) is rotatably sleeved with a rotating plate (23), the rotating plate (23) and the rectangular plates (31) are fixedly connected with one torsion spring (29), the torsion spring (29) is sleeved on the rotating rod (30), a round groove (28) is formed in the bottom of the rotating plate (23), and the outer wall of the rotating shaft (7) is rotatably connected with an L-shaped rod (26) which is clamped with the round groove (28).
4. The steam pipeline butterfly valve with the pressure relief function according to claim 1, wherein the second pressure relief assembly comprises a transverse plate (27) fixedly connected to the inner wall of the first rectangular box (3), an air outlet (24) is formed in the transverse plate (27), a circular plate (25) matched with the air outlet (24) is fixedly connected to the bottom of the rotating shaft (7), and an auxiliary pipe (4) is fixedly communicated with the bottom of the first rectangular box (3).
5. The steam line butterfly valve with pressure relief function according to claim 3, characterized in that the top of the rotating plate (23) is provided with a rubber pad (22).
6. The steam pipeline butterfly valve with the pressure relief function according to claim 1, wherein a side plate (18) is fixedly connected to one side of the second rectangular box (9), a first sliding plate (5) is slidably connected to one side of the side plate (18), the first sliding plate (5) is slidably sleeved on the outer wall of the three convex plates (19), and two symmetrically arranged tension springs (17) are fixedly connected between one side of the first sliding plate (5) and one side of the second rectangular box (9).
7. The steam pipeline butterfly valve with the pressure relief function according to claim 1, wherein the butterfly valve body (10) and the connecting pipe (1) are fixedly connected through a flange (2).
8. The steam line butterfly valve with pressure relief function according to claim 4, characterized in that the top of said circular plate (25) is inclined.
CN202210457841.XA 2022-04-27 2022-04-27 Steam pipeline butterfly valve with pressure relief function Active CN114738502B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210457841.XA CN114738502B (en) 2022-04-27 2022-04-27 Steam pipeline butterfly valve with pressure relief function

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Application Number Priority Date Filing Date Title
CN202210457841.XA CN114738502B (en) 2022-04-27 2022-04-27 Steam pipeline butterfly valve with pressure relief function

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CN114738502A true CN114738502A (en) 2022-07-12
CN114738502B CN114738502B (en) 2023-08-29

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0026935A1 (en) * 1979-10-09 1981-04-15 Georg Fischer Aktiengesellschaft Butterfly valve
CN204344944U (en) * 2014-11-26 2015-05-20 江苏兴科原机械科技有限公司 A kind of pressure-relief type butterfly valve
CN205896372U (en) * 2016-07-18 2017-01-18 纽威阀门有限公司 Butterfly valve with pressure release function
CN206429674U (en) * 2016-12-30 2017-08-22 沃孜(天津)流体技术研发有限公司 A kind of gas pipeline butterfly valve
CN107631037A (en) * 2016-07-18 2018-01-26 纽威阀门有限公司 A kind of automatic decompression type butterfly valve
CN110630752A (en) * 2019-09-05 2019-12-31 李彩华 Convenient butterfly valve with waterproof function
CN212564581U (en) * 2020-05-08 2021-02-19 永嘉铭轩机械科技有限公司 Novel butterfly valve with pressure release function in advance
CN215110551U (en) * 2021-01-20 2021-12-10 合力阀门有限公司 Eccentric butterfly valve

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0026935A1 (en) * 1979-10-09 1981-04-15 Georg Fischer Aktiengesellschaft Butterfly valve
CN204344944U (en) * 2014-11-26 2015-05-20 江苏兴科原机械科技有限公司 A kind of pressure-relief type butterfly valve
CN205896372U (en) * 2016-07-18 2017-01-18 纽威阀门有限公司 Butterfly valve with pressure release function
CN107631037A (en) * 2016-07-18 2018-01-26 纽威阀门有限公司 A kind of automatic decompression type butterfly valve
CN206429674U (en) * 2016-12-30 2017-08-22 沃孜(天津)流体技术研发有限公司 A kind of gas pipeline butterfly valve
CN110630752A (en) * 2019-09-05 2019-12-31 李彩华 Convenient butterfly valve with waterproof function
CN212564581U (en) * 2020-05-08 2021-02-19 永嘉铭轩机械科技有限公司 Novel butterfly valve with pressure release function in advance
CN215110551U (en) * 2021-01-20 2021-12-10 合力阀门有限公司 Eccentric butterfly valve

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