CN202691091U - Butterfly valve plate based on reduction of cavitation erosion damage - Google Patents

Butterfly valve plate based on reduction of cavitation erosion damage Download PDF

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Publication number
CN202691091U
CN202691091U CN 201220388195 CN201220388195U CN202691091U CN 202691091 U CN202691091 U CN 202691091U CN 201220388195 CN201220388195 CN 201220388195 CN 201220388195 U CN201220388195 U CN 201220388195U CN 202691091 U CN202691091 U CN 202691091U
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CN
China
Prior art keywords
valve plate
valve
broach
degrees
group
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Withdrawn - After Issue
Application number
CN 201220388195
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Chinese (zh)
Inventor
崔宝玲
尚照辉
李征
林哲
石柯
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Zhejiang Sci Tech University ZSTU
Zhejiang University of Science and Technology ZUST
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Zhejiang Sci Tech University ZSTU
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Priority to CN 201220388195 priority Critical patent/CN202691091U/en
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Publication of CN202691091U publication Critical patent/CN202691091U/en
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Abstract

The utility model discloses a butterfly valve plate based on reduction of cavitation erosion damage. A cone angle Alpha of a rigid sealing surface is greater than 45 degrees and less than 60 degrees. A mounting hole in the center of the valve plate inclines toward a fluid inlet from the center of the valve plate. One side of the valve plate, close to the fluid inlet, is a flat surface, and the other side of the valve plate is a diversion conical surface. Both the flat surface and the diversion conical surface are provided with three groups of comb teeth which are uniformly distributed in a radial manner according to a proportion of 11: 19: 27, wherein R1, R2 and R3 are each radius of the three groups of comb teeth, respectively. Each group of comb teeth is inclined toward a central position, and an angle of inclination Omega is greater than 60 degrees and less than 66 degrees. Each comb tooth is a cone with an arc on the top, and a cone angle of each comb tooth is from 5 degrees to 7 degrees. The groups of comb teeth are arranged and interlaced with equal intervals. The butterfly valve plate has functions of a single eccentric butterfly valve. During opening and closing operation of a valve, a rubber valve seat is gradually compacted from all positions of a periphery of the valve plate in an irregular manner to generate interference, thereby reaching sealing specific pressure and realizing good sealing performance. In addition, when fluid passes by the comb teeth on the valve plate, a pressure difference in front of and behind the valve is reduced, and cavitation erosion of the valve is minimized.

Description

A kind of butterfly valve plate based on reducing to cavitate and damage
Technical field
The utility model relates to a kind of butterfly valve, especially relates to a kind of butterfly valve plate based on reducing to cavitate and damage.
Background technique
Butterfly valve is a kind of modulating valve simple in structure, also can be used for the switch control of low pressure pipeline medium simultaneously.Be applicable to carry on the pipeline of various corrosivity, non-corrosive fluids medium in the engineering systems such as producer, coal gas, rock gas, liquefied petroleum gas (LPG), town gas, cold and hot air, chemical industry smelting and generation environment-friendly, being used for regulating and block flowing of medium, is one of fluid control elements of the most extensive use.
Be accompanied by processes technology and the development of material industry in modern age, the application of butterfly valve is traditional range head and shoulders above, almost can all replace gate valve, stop valve, stopcock and the ball valve that used uses and is applied to the every field of industry.So, exploitation be applicable to the high parameter operating mode, can long-term operation the butterfly valve product, become the common problems of concern of valve manufacturing industry and use department.The design large-diameter butterfly valve not only needs to solve the material problem of using material, and needs accurately to understand the hydraulic characteristic of valve, thereby provides foundation for valve improves design.
And be applied to element in this particular surroundings, must have corresponding survivability and avoid fluid that corrosion and the temporary impact of sealing surface are destroyed.Liquid flow impact during in actual applications, often owing to valve opening or closure causes the valve seal position very easily to damage.In addition, in a single day valve cavitates, will reduce the bearing capacity of valve, produces vibration and noise, and the destruction of causing component affects the normal operation of valve.Cavitation erosion damages and usually occurs in the key position that determines the valve main performance, and as cutting off the closure member with valve, the throttling flap of control valve has sealing pair of seal request valve etc.So the cavitation phenomenon of research valve more and more comes into one's own.
Therefore, the Rational structure of research butterfly valve body internal flow mechanism and plate member is to reduce fluid in the local energy loss of butterfly valve runner inside with to the erosion damage at valve plate sealing position, efficient and the working life of improving butterfly valve.
Summary of the invention
In order to overcome the deficiency of butterfly valve in the background technique, the purpose of this utility model is to provide a kind of butterfly valve plate based on reducing to cavitate and damage, thereby plays reduction valve cavitation erosion to a certain extent, improves the valve effect in working life.
The technical solution adopted in the utility model is:
The utility model comprises that the valve plate circumferential edges has the rigid seal face, and the valve plate middle part has the valve rod pilot hole; The cone angle of described rigid seal face αBe 45 °< α<60 °, the pilot hole at valve plate middle part is platen surface with deflection fluid input place, valve plate central position near fluid input one side valve plate, is the water conservancy diversion conical surface near fluid output one side valve plate, on platen surface and the water conservancy diversion conical surface all take radius as R 1, R 2, R 3, and in the radially equally distributed three groups of broach of the ratio of 11:19:27, every group of broach all tilts the tilt angle to the central position ωBe 60 °< ω<66 °, broach be the top with the cone of circular arc, cone angle is 5 °~7 °, group and broach between the group equidistant placement of interlocking.
The staggered equidistant placement of broach between described group and group is 7.2 °~9 °.
The beneficial effect that the utlity model has is:
The utlity model has the function of single eccentric-butterfly-valve, valve close with the Open valve process in, the valve plate outside compresses gradually brokenly rubber valve seat and produces magnitude of interference from each position, reach seal pressure, realizes good sealability.In addition, fluid can effectively reduce valve front and back pressure reduction through the comb structure effect on the valve plate, and main purpose is to reach to reduce the purpose that the valve cavitation phenomenon produces.
In addition, because the valve plate surface integral is parabolic shape, and valve plate is centered close to eccentric position, stressedly when compressing valve seat evenly do not concentrate point-blank, therefore can not cause rubber valve seat (packing ring) to turn down or tear; In the Open valve process, valve plate breaks away from valve seat gradually, does not have the effect of vertical forces between valve plate and the valve seat, thereby greatly reduced the frictional heat between the sealing pair, reduce wearing and tearing, reduced the operation moment of torsion, therefore reduced the energy consumption that valve plate opens and closes.
The utility model can satisfy the demand in the fields such as petroleum and chemical industry.
Description of drawings
Fig. 1 is the structural representation of butterfly valve.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the sectional view of Fig. 2 valve plate.
Fig. 4 is the worm's eye view of Fig. 3.
Fig. 5 is the plan view of Fig. 3.
Fig. 6 is the right elevation of valve plate among Fig. 1.
Among the figure: 1, valve plate opens and closes operating mechanism, and 2, valve rod, 3, valve body, 4, packing ring, 5, valve plate, 6, broach, 7, the shunting chamfering, 8, the water conservancy diversion conical surface, 9, the rigid seal face, 10, the valve rod pilot hole, 11, valve plate assembling tapped hole.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 1 and Figure 2, a kind of butterfly valve plate based on reducing to cavitate and damage comprises that valve plate opens and closes operating mechanism 1, valve rod 2, and valve body 3, packing ring 4 and valve plate 5 valve plates 5 are provided with broach 6.Comprise that the valve plate circumferential edges has rigid seal face 9, the valve plate middle part has the valve rod pilot hole: such as Fig. 3, Fig. 4, Fig. 5, shown in Figure 6, the cone angle of described rigid seal face αBe 45 °< α<60 °, the pilot hole at valve plate middle part is less than normal to the fluid input place with the valve plate central position, is platen surface near fluid input one side valve plate, is the water conservancy diversion conical surface 8 near fluid output one side valve plate, on platen surface and the water conservancy diversion conical surface all take radius as R 1, R 2, R 3, and in the radially equally distributed three groups of broach of the ratio of 11:19:27, every group of broach all tilts the tilt angle to the central position ωBe 60 °< ω<66 °, broach be the top with the cone of circular arc, cone angle is 5 °~7 °, group and broach between the group equidistant placement of interlocking.The staggered equidistant placement of broach between described group and group is 7.2 °~9 °.
Such as Fig. 3, Fig. 4, Fig. 5, shown in Figure 6, the valve plate diameter that the utility model adopts is 300mm, and thickness is 112mm, adopts rigid seal face 9, and sealing surface edge cone angle is α=60 °, the pilot hole diameter at valve plate middle part is 35mm, and its central position is less than normal to the fluid input place, and eccentric distance is 25mm; Adopting platen surface near the fluid input place, the transition region of valve rod pilot hole and platen surface adopts large chamfering structure, and shunting chamfering 7 is R=50mm; Distribute on the valve rod pilot hole three and assemble tapped holes 11, its radial spacing is L 1=L 2=120mm; On the platen surface take radius as R 1=55mm, R 2=95mm, R 3=135mm three groups of the broach that radially evenly distribute, radius is R 1One group of broach be 24, the comb tooth spacing angle is θ=15 °, radius is R 2One group of broach be 22, the comb tooth spacing angle is θ=15 °, radius is R 3One group of broach be 20, the comb tooth spacing angle is θ=15 °, every group of staggered equidistant placement of broach; Be the water conservancy diversion conical surface near fluid output one side valve plate, take butterfly plate pilot hole center and intersection, conical surface tilt angle as basal plane, on this basal plane take radius as R 1=55mm, R 2=95mm, R 3=135mm three groups of the broach that radially evenly distribute, radius is R 1One group of broach be 12, the comb tooth spacing angle is θ=15 °, radius is R 2One group of broach be 18, the comb tooth spacing angle is θ=15 °, radius is R 3One group of broach be 20, the comb tooth spacing angle is θ=15 °, every group of staggered equidistant placement of broach; Every group of broach all tilts to the central position, and the angle of inclination is ω=66 °, broach be the top with the cone of circular arc, highly consistent, cone angle is β=6 °, the broach 6 on valve plate two sides can not be long, when valve plate rotates, in order to avoid produce interference with valve interior wall.
Such as Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, comprise in a kind of butterfly valve plate design that damages based on reducing to cavitate that valve plate opens and closes operating mechanism 1, valve rod 2, valve body 3, packing ring 4, valve plate 5, rigid seal face 6, decompression broach 7, shunting chamfering 8, the water conservancy diversion conical surface 9, valve rod pilot hole 10, valve plate assembling tapped hole 11.Be provided with successively from top to bottom three tapped holes between stem lower portion and the valve plate.
A kind of butterfly valve plate design that damages based on reducing to cavitate is a kind of valve with sealing and shunting decompression function, especially the shunting decompression valve board structure with broach that itself has is a kind of novel expenditure and pressure and sealing configuration, and the valve board structure of shunting decompression cooperates with valve seal.Wherein, the cone angle on valve plate rigid seal limit is α(45 °< α<60 °), it is R(R=50mm that plate face one side of shunting decompression valve plate adopts platen surface and chamfering) the transiens structure, another side adopts cone to add broach 6 structures, between each broach with θ(10 °< θ<15 °) angle evenly distributes, and the angle of broach and the water conservancy diversion conical surface is ω(60 °< ω<66 °), size is respectively R 1, R 2, R 3, L 1, L 2The advantage of valve is that this valve plate has the function of single eccentric-butterfly-valve, valve close with the Open valve process in, the valve plate outside compresses gradually brokenly rubber valve seat and produces magnitude of interference from each position, reach seal pressure, realizes good sealability.In addition, fluid can effectively reduce valve front and back pressure reduction through the comb structure effect on the valve plate, and main purpose is to reach to reduce the purpose that the valve cavitation phenomenon produces.
The utility model is intended to by solve some shortcomings of modern valve in conjunction with shunting decompression and anti-cavitation erosion principle and rigid seal structure.Take full advantage of shock resistance destruction and the rigid seal reliability of structure energy of shunting decompression structure, developed the butterfly valve of novel shunting decompression valve board structure, researched and developed corresponding valve plate sealing structure, improve shock resistance damage capability and the working life of butterfly valve, adapted to multiple special flow body medium to the demand of butterfly valve performance.
Working procedure of the present utility model is as follows:
1) opens and closes operating mechanism by valve plate and be connected to the valve plate of valve rod lower end, in the Open valve process, valve plate breaks away from valve seat gradually, owing to there not being the effect of vertical forces between valve plate and the valve seat, thereby greatly reduced the frictional heat between the sealing pair, reduce wearing and tearing, reduced the operation moment of torsion, therefore reduced the energy consumption that valve plate opens and closes.
2) when butterfly valve one side-entrance end incoming fluid medium, open and close the operating mechanism rotation valve rod by valve plate and slowly open the shunting decompression valve plate, flowing medium arrives around the valve plate flowing medium through shunting decompression face and the shunting broach of sidewall band throttle angle, forms for the first time shunting decompression.
3) by rotation valve rod the shunting decompression valve plate is opened gradually, shunting decompression valve plate one side liquid medium is again through the water conservancy diversion conical surface and shunting broach, fluid medium forms for the second time shunting decompression, and then flowing medium flows out the outlet end of valve flowing channel, namely finishes the moment of valve and opens.
4) being rotated further along with valve rod, it is large that the valve plate corner becomes, the utilization ratio of valve plate sidewall shunting decompression broach increases gradually, when valve plate is in 90 ° when opening fully, be that flowing medium is more obvious through the effect of shunting decompression valve plate shunting decompression, so that the erosion attack effect in high speed and high pressure fluid convection road reduces greatly, thereby prolonged working life of valve.
5) when valve plate is closed, stressed even when compressing valve seat because valve plate integral body is parabolic shape, do not concentrate point-blank, therefore can not cause rubber valve seat (packing ring) to turn down or tear; The comb structure design of both sides produces magnitude of interference so that valve valve plate outside when closure compresses rubber valve seat brokenly gradually from each position, reaches seal pressure, realizes good sealability.
Shunting decompression valve board structure of the present utility model is entity, when high temperature, high pressure, high-velocity fluid medium are flowed through the valve plate process by valve plate one side runner, form for the first time shunting decompression of eddy current behind the shunting chamfering front end of the certain throttle angle of band and the broach, and when flowing medium flows through valve plate one side and enters opposite side, enter by the water conservancy diversion conical surface and to play for the second time shunting decompression effect after the broach district forms eddy current again.So far, flowing medium by shunting decompression repeatedly after, substantially slow down and eliminated flowing medium in valve plate opening and closing moment the high speed erosion attack to valve plate; Anisopleural surface design, the in addition effect of flowing medium, make valve convenient when opening, simultaneously, the comb structure design of both sides, produce magnitude of interference so that valve valve plate outside when closure compresses rubber valve seat brokenly gradually from each position, reach seal pressure, realize good sealability.Therefore, the design of the shunting decompression on valve plate surface has further increased the working life of valve with the structure that forms that cooperates of the rigid seal face at valve plate edge, has improved its whole performance, guarantees that long-time the continuing of valve used.

Claims (2)

1. one kind based on the butterfly valve plate that reduces to cavitate and damage, and comprises that the valve plate circumferential edges has the rigid seal face, and the valve plate middle part has the valve rod pilot hole; It is characterized in that: the cone angle of described rigid seal face αBe 45 °< α<60 °, the pilot hole at valve plate middle part is platen surface with deflection fluid input place, valve plate central position near fluid input one side valve plate, is the water conservancy diversion conical surface near fluid output one side valve plate, on platen surface and the water conservancy diversion conical surface all take radius as R 1, R 2, R 3, and in the radially equally distributed three groups of broach of the ratio of 11:19:27, every group of broach all tilts the tilt angle to the central position ωBe 60 °< ω<66 °, broach be the top with the cone of circular arc, cone angle is 5 °~7 °, group and broach between the group equidistant placement of interlocking.
2. a kind of butterfly valve plate based on reducing to cavitate and damaging according to claim 1 is characterized in that: described group with group between the broach equidistant placement of interlocking be 7.2 °~9 °.
CN 201220388195 2012-08-07 2012-08-07 Butterfly valve plate based on reduction of cavitation erosion damage Withdrawn - After Issue CN202691091U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220388195 CN202691091U (en) 2012-08-07 2012-08-07 Butterfly valve plate based on reduction of cavitation erosion damage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220388195 CN202691091U (en) 2012-08-07 2012-08-07 Butterfly valve plate based on reduction of cavitation erosion damage

Publications (1)

Publication Number Publication Date
CN202691091U true CN202691091U (en) 2013-01-23

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102840344A (en) * 2012-08-07 2012-12-26 浙江理工大学 Valve plate of butterfly valve based on reduction of cavitation damage
CN104879507A (en) * 2015-04-10 2015-09-02 袁前灿 Vibration attenuation adjusting butterfly valve
CN107387797A (en) * 2017-07-04 2017-11-24 神华集团有限责任公司 Ball valve

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102840344A (en) * 2012-08-07 2012-12-26 浙江理工大学 Valve plate of butterfly valve based on reduction of cavitation damage
CN102840344B (en) * 2012-08-07 2013-12-25 浙江理工大学 Valve plate of butterfly valve based on reduction of cavitation damage
CN104879507A (en) * 2015-04-10 2015-09-02 袁前灿 Vibration attenuation adjusting butterfly valve
CN107387797A (en) * 2017-07-04 2017-11-24 神华集团有限责任公司 Ball valve

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C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20130123

Effective date of abandoning: 20131225

RGAV Abandon patent right to avoid regrant