CN202140584U - Two-way sealing floating type tri-eccentric butterfly valve - Google Patents

Two-way sealing floating type tri-eccentric butterfly valve Download PDF

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Publication number
CN202140584U
CN202140584U CN201120242100U CN201120242100U CN202140584U CN 202140584 U CN202140584 U CN 202140584U CN 201120242100 U CN201120242100 U CN 201120242100U CN 201120242100 U CN201120242100 U CN 201120242100U CN 202140584 U CN202140584 U CN 202140584U
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CN
China
Prior art keywords
valve
floating
butterfly
eccentric
butterfly plate
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Expired - Fee Related
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CN201120242100U
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Chinese (zh)
Inventor
赵秀祥
徐正占
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Individual
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Individual
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Priority to CN201120242100U priority Critical patent/CN202140584U/en
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Publication of CN202140584U publication Critical patent/CN202140584U/en
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Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a two-way sealing floating type tri-eccentric butterfly valve, which comprises a valve body, a valve rod and a butterfly plate and is characterized in that the butterfly plate inside the valve body is fixedly connected to the valve rod through a pin, and the valve rod is connected to a transmission mechanism through a key so as to transmit motion. A floating valve seat is disposed respectively on two axial ends of the butterfly plate close to the inner wall of the valve body. An eccentric structure is adopted among the valve body, the valve rod and the butterfly plate, the floating valve seat is a dynamic seal, and a spring pretightening force controls axial displacement of the floating valve seat. The two-way sealing floating type tri-eccentric butterfly valve adopts a tri-eccentric structure, and the valve seat is the dynamic seal, so that the sealing structure is not limited by a medium pressure direction.

Description

The floating type three eccentric butterfly valve of two way sealed
Technical field
The utility model relates to butterfly valve, relates in particular to the floating type three eccentric butterfly valve of two way sealed.
Background technique
Simple in structure because of it, open and close fast, structure is short and small, price is low, butterfly valve is applied widely.Common in the market butterfly valve product mainly is made up of valve body, valve rod, butterfly plate, driving mechanism, and valve body is provided with the sealing surface of seat that cooperatively interacts with the butterfly plate sealing surface, and this sealing surface of seat has hard sealing and two kinds of structural types of soft seal.In order to reduce open and close torque, improve seal pressure, general three eccentric structures that adopt between the valve body of butterfly valve, valve rod, the butterfly plate.
Existing butterfly valve product; Like publication number is the disclosed metallic sealing butterfly valve of one Chinese patent application CN1570434; Mainly comprise valve body, valve seat, valve rod, valve plate, support, seal ring, rotating mechanism etc. on the structure; The sealing surface of its valve plate and the rotating center of valve plate depart from, the rotating center of valve plate and the misalignment of valve body, and the center and the valve plate rotating center of valve plate involute shape sealing surface depart from.This structure becomes the three eccentric butterfly valve, and major advantage is that unlatching is laborsaving, reduces wear.
Through development in recent years, three eccentric hard seal butterfly valves design and make trend maturation and perfect, and novelty is with reliable more for structure, and performance is more superior, especially for bigbore equipment.But; When working condition is the valve two way sealed; The inaccessible designing requirement of existing three eccentric butterfly valve: eccentric-butterfly-valve is because of the existence of the eccentric structure of its valve rod and channel center; Along with the increase valve plate of pressure medium and the unit positive pressure between the valve seat during less than medium pressure, sealing begins to leak, and can't satisfy reverse seal request when medium counter flow.
The floating type three eccentric butterfly valve of the disclosed two way sealed of the utility model has overcome above-mentioned defective.
Summary of the invention
The utility model discloses the floating type three eccentric butterfly valve of two way sealed; Overcome three eccentric butterfly valve of the prior art owing to the existence of eccentric-butterfly-valve because of the eccentric structure of its valve rod and channel center; When medium counter flow along with the increase valve plate of pressure medium and the unit positive pressure between the valve seat during less than medium pressure; Sealing begins to leak, and can't satisfy the defective of reverse seal request, and the floating type three eccentric butterfly valve sealing configuration of disclosed two way sealed does not receive the restriction of pressure medium direction.
The floating type three eccentric butterfly valve of the disclosed two way sealed of the utility model comprises valve body, valve rod, butterfly plate; It is characterized in that the butterfly plate in the said valve body is fixedly connected on the valve rod by pin, said valve rod is connected to the driving mechanism transmitting movement through key; Said butterfly plate axis is provided with floating valve seat to two ends near valve interior wall; Adopt eccentric structure between said valve body, valve rod, the butterfly plate, said floating valve seat is motive sealing, controls the axial displacement of said floating valve valve seat by initial tension of spring.
In the utility model, said floating valve seat sealing surface adopts stainless steel to be processed into tilted conical surface and the butterfly plate external diameter soft or hard overlapping seal ring of packing into and is processed into the sealing that cooperatively interacts between the tilted conical surface; Said soft or hard overlapping seal ring is fixed by trim ring and hexagon socket head cap screw.Although the claimant points out that at this tilted conical surface is processed by stainless steel, also be to belong to the utility model protection domain equally for understood by one of ordinary skill in the art yet adopt other suitable material.
In the utility model, said floating valve seat external diameter car groove be placed with two resistant to elevated temperatures elasticity O type circles by spring with compress gland location; The said gland that compresses is by hexagon socket head cap screw and interior hexagonal flush end Cock screw free adjustment.
Compare with existing procucts with existing technology, the floating type three eccentric butterfly valve of the two way sealed of the utility model, sealing surface are three off-centre, and floating valve seat is motive sealing, by its axial displacement of initial tension of spring control.Begin to interfere with floating valve seat in 2 positions, the degree left and right sides when butterfly plate closes valve, moving through initial tension of spring makes the sealing that closely cooperates of butterfly plate sealing surface and floating valve seat sealing surface, has realized that sealing configuration does not receive the restriction of pressure medium direction.
In the utility model, the floating valve seat sealing surface is made up of the stainless steel metal material, and not washed away by medium influences, longer service life.Butterfly plate adopts streamlined structure, and intensity is high, and area of passage is big, and flow resistance is little.The butterfly plate external diameter soft or hard overlapping seal ring of packing into, can be conveniently maintenance and changing on pipeline.Can not break away from valve in opposite direction working pressure lower seal and sit the optimal seal position, play automatic compensating action, keep reliable sealing along with the valve plate distortion.
The floating type three eccentric butterfly valve of the two way sealed of the utility model, sealability is reliable and stable, and its design of experiment confirm meets the regulation of JB/T8527.
Description of drawings
Fig. 1 is the structural front view of the floating type three eccentric butterfly valve of two way sealed of the utility model;
Fig. 2 is the partial enlarged drawing of the floating type three eccentric butterfly valve of two way sealed of the utility model.
In giving accompanying drawing, the following implication of each digitized representation:
1, end cap; 2, end caps hexagon socket head cap screw; 3, pad; 4, divided ring; 5, self lubrication bearing; 6, valve body; 7, gland place hexagon socket head cap screw; 8, spring; 9, gland; 10, trim ring; 11, straight pin; 12, valve rod; 13, butterfly plate; 14, trim ring place hexagon socket head cap screw; 15, soft or hard overlapping seal ring; 16, floating valve seat; 17, O shape circle; 18, interior hexagonal flush end Cock screw; 19, stuffing box packing; 20, Gland; 21, support; 22, key; 23, driving mechanism.
Embodiment
Can better understand the invention spirit of the utility model below in conjunction with accompanying drawing and embodiment.It is to be noted; Following embodiment only is used to a kind of mode of execution example of explaining that the utility model is used; Common variation that those skilled in the art carries out on the basis that makes much of the utility model invention spirit and replacement still belong to the protection domain of the utility model, and the protection domain of the utility model is covered by the equivalents of its claim and claim.
Like Fig. 1, shown in Figure 2, the utility model the floating type three eccentric butterfly valve of two way sealed, comprise valve body 6, valve rod 12, butterfly plate 13, butterfly plate 13 is fixedly connected on the valve rod 12 by pin 10, valve rod 12 is connected to driving mechanism 23 transmission motion through key 22.Adopt eccentric structure between valve body 6, valve rod 12, the butterfly plate 13, floating valve seat 16 is for motive sealing, by its axial displacement of spring 8 pretightening forces control.
Further, floating valve seat 16 sealing surfaces adopt stainless steel to be processed into tilted conical surface and the butterfly plate 13 external diameters soft or hard overlapping seal ring 15 of packing into and are processed into the sealing that cooperatively interacts between the tilted conical surface.Floating valve seat 16 external diameter car grooves are put into 2 resistant to elevated temperatures elasticity O type circles 17 and are done to regulate the location by spring 8, gland 9 and hexagon socket head cap screw 7, hexagonal flush end Cock screw 18.Soft or hard overlapping seal ring 15 is fixed by trim ring 10 and hexagon socket head cap screw 14.
On between valve body 6 upper ends and the valve rod 12, seal employing stuffing box packing 19, sealing filler 19 compresses installation by Gland 20, and driving mechanism 23 is installed on the valve body 6 through support 21.Valve body 6 lower end pads 3 compress end cap 1 sealing by hexagon socket head cap screw 2.Divided ring 4 is by valve rod 12 and end cap 1 location.
Begin to interfere with floating valve seat 16 in 2 positions, the degree left and right sides when butterfly plate 13 closes valve, make the sealing that closely cooperates of soft or hard overlapping seal ring 15 and floating valve seat 16 sealing surfaces through the motion of spring 8 pretightening forces; During the positive stream mode of medium; Pressure is high more, and the sealing extruding is tight more, when runner medium counter flow state; Increase with pressure medium; Unit positive pressure between butterfly plate 13 and the floating valve seat 16 is during less than medium pressure, and butterfly plate 13 can produce small resiliently deformable because of the medium active force, and produces small change in location along the direction of medium active force; At this moment compensate, absorb and discharge small size and change in location by the energy of deformation of being stored behind spring 8 stands under load, keep sealing state.
The above embodiment is a kind of of the more preferably concrete mode of execution of the utility model, and common variation that those skilled in the art carries out in the utility model technological scheme scope and replacement all should be included in the protection domain of the utility model.

Claims (5)

1. the floating type three eccentric butterfly valve of two way sealed comprises valve body, valve rod, butterfly plate, it is characterized in that the butterfly plate in the said valve body is fixedly connected on the valve rod by pin, and said valve rod is connected to the driving mechanism transmitting movement through key; Said butterfly plate axis is provided with floating valve seat to two ends near valve interior wall; Adopt eccentric structure between said valve body, valve rod, the butterfly plate, said floating valve seat is motive sealing, and initial tension of spring is controlled said floating valve seat axial displacement.
2. the floating type three eccentric butterfly valve of two way sealed according to claim 1 is characterized in that said floating valve seat sealing surface adopts stainless steel to be processed into tilted conical surface and the butterfly plate external diameter soft or hard overlapping seal ring of packing into and is processed into the sealing that cooperatively interacts between the tilted conical surface.
3. the floating type three eccentric butterfly valve of two way sealed according to claim 1 is characterized in that said soft or hard overlapping seal ring is fixed by trim ring and hexagon socket head cap screw.
4. the floating type three eccentric butterfly valve of two way sealed according to claim 1, it is characterized in that said floating valve seat external diameter car groove be placed with two resistant to elevated temperatures elasticity O type circles by spring with compress gland location.
5. the floating type three eccentric butterfly valve of two way sealed according to claim 4 is characterized in that the said gland that compresses is by hexagon socket head cap screw and interior hexagonal flush end Cock screw free adjustment.
CN201120242100U 2011-07-11 2011-07-11 Two-way sealing floating type tri-eccentric butterfly valve Expired - Fee Related CN202140584U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201120242100U CN202140584U (en) 2011-07-11 2011-07-11 Two-way sealing floating type tri-eccentric butterfly valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201120242100U CN202140584U (en) 2011-07-11 2011-07-11 Two-way sealing floating type tri-eccentric butterfly valve

Publications (1)

Publication Number Publication Date
CN202140584U true CN202140584U (en) 2012-02-08

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CN201120242100U Expired - Fee Related CN202140584U (en) 2011-07-11 2011-07-11 Two-way sealing floating type tri-eccentric butterfly valve

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103375595A (en) * 2012-04-12 2013-10-30 上海康泉阀门有限公司 Zero-friction bidirectional metal seal butterfly valve
CN104329475A (en) * 2014-11-04 2015-02-04 无锡市亚迪流体控制技术有限公司 Three-eccentric and bidirectional metal sealing butterfly valve
CN104482228A (en) * 2014-12-11 2015-04-01 天津国际机械有限公司 Bidirectional metal seal hydraulic control butterfly valve
CN105221777A (en) * 2015-11-02 2016-01-06 河南泉舜流体控制科技有限公司 Bidirectional metal sealing spiral valve
CN105465385A (en) * 2016-02-01 2016-04-06 上海理工大学 Three-eccentric center butterfly valve used in high temperature and high pressure steam
CN105570486A (en) * 2016-03-01 2016-05-11 江苏神通阀门股份有限公司 Ball valve sealed by using corrugated pipe
CN106321867A (en) * 2016-11-09 2017-01-11 胜利阀门有限公司 Multilayerbidirectional hard sealing butterfly valve

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103375595A (en) * 2012-04-12 2013-10-30 上海康泉阀门有限公司 Zero-friction bidirectional metal seal butterfly valve
CN104329475A (en) * 2014-11-04 2015-02-04 无锡市亚迪流体控制技术有限公司 Three-eccentric and bidirectional metal sealing butterfly valve
CN104482228A (en) * 2014-12-11 2015-04-01 天津国际机械有限公司 Bidirectional metal seal hydraulic control butterfly valve
CN105221777A (en) * 2015-11-02 2016-01-06 河南泉舜流体控制科技有限公司 Bidirectional metal sealing spiral valve
CN105465385A (en) * 2016-02-01 2016-04-06 上海理工大学 Three-eccentric center butterfly valve used in high temperature and high pressure steam
CN105570486A (en) * 2016-03-01 2016-05-11 江苏神通阀门股份有限公司 Ball valve sealed by using corrugated pipe
CN106321867A (en) * 2016-11-09 2017-01-11 胜利阀门有限公司 Multilayerbidirectional hard sealing butterfly valve

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120208

Termination date: 20150711

EXPY Termination of patent right or utility model