CN202733009U - Flange two-way pressure hard sealing butterfly valve - Google Patents

Flange two-way pressure hard sealing butterfly valve Download PDF

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Publication number
CN202733009U
CN202733009U CN 201220392863 CN201220392863U CN202733009U CN 202733009 U CN202733009 U CN 202733009U CN 201220392863 CN201220392863 CN 201220392863 CN 201220392863 U CN201220392863 U CN 201220392863U CN 202733009 U CN202733009 U CN 202733009U
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CN
China
Prior art keywords
valve
valve seat
butterfly
valve body
sealing
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.)
Expired - Fee Related
Application number
CN 201220392863
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Chinese (zh)
Inventor
陈孙强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Skill Wound Valve Manufacturing Co Ltd
Original Assignee
Beijing Skill Wound Valve Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing Skill Wound Valve Manufacturing Co Ltd filed Critical Beijing Skill Wound Valve Manufacturing Co Ltd
Priority to CN 201220392863 priority Critical patent/CN202733009U/en
Application granted granted Critical
Publication of CN202733009U publication Critical patent/CN202733009U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a flange two-way pressure hard sealing butterfly valve which comprises a valve body, a valve rod arranged on the valve body and a butterfly plate which is arranged on the valve rod. A movable valve seat is arranged between the periphery side of the butterfly plate and the inner wall of the valve body, the position where the butterfly plate and the movable valve seat are close is provided with a metal sealing ring, and the metal sealing ring is fixed on the butterfly plate by inner hexagon screws. The contacting face of the valve body and one end of the movable valve seat in a main pressure-bearing direction is provided with a limiting stopping block. The excircle of the movable valve seat in the main pressure-bearing direction is provided with a sealing groove, and an O-shaped ring is arranged inside the sealing groove. The sealing ring is fixed on the butterfly plate through the pressing plate, the excirle of the movable valve seat is provided with the sealing groove in a main bearing direction, and the O-shaped ring is arranged. Zero leakage sealing of the contacting face of the excircle of the movable valve seat and an inner cavity of the valve body is achieved, and the requirement that the contacting face of the valve seat and the inner cavity of the valve body is of no leakage is met. The flange two-way pressure hard sealing butterfly valve is simple in structure and low in cost and can achieve two-way sealing reliably.

Description

Flange Bidirectional pressure hard seal butterfly valve
Technical field
The utility model relates to butterfly valve, specifically flange Bidirectional pressure hard seal butterfly valve.
Background technique
The butterfly valve of prior art structurally substantially all is to be constituted by the valve rod of valve body, valve inner, the butterfly plate that is enclosed within on the valve rod at present, valve rod is by the drive unit driven rotary of peripheral hardware, then butterfly plate is followed valve rod rotary work in valve body, this shows, the butterfly plate periphery is a technology emphasis with the sealing of valve interior wall, but existing butterfly valve seal effect and bad, endurance is inadequate, will produce the poor problem of sealing in short time, directly affect the performance of butterfly valve; Also having in addition the more important, is exactly to solve the problem that seals after can't solving at present bidirectional pressing.So be a kind of brand-new butterfly valve of necessary exploitation at this point.
In view of this, for the problems referred to above, propose a kind of reasonable in design and effectively improve the flange Bidirectional pressure hard seal butterfly valve of above-mentioned disappearance.
The model utility content
The purpose of this utility model is to provide flange Bidirectional pressure hard seal butterfly valve, and metal o-ring is fixed by bolts on the butterfly plate by pressing plate, on one side movable valve seat cylindrical has seal groove in main pressure-bearing direction, O type circle is set.Realization activity valve seat cylindrical and body cavity surface of contact zero revealed sealing, and valve seat and body cavity surface of contact are without revealing requirement when guaranteeing bidirectional pressing.The utility model is simple in structure, and cost is low, can realize reliably two way sealed.
In order to reach above-mentioned purpose, the utility model has adopted following technological scheme, and flange Bidirectional pressure hard seal butterfly valve comprises valve body, is installed in valve rod on the valve body, is installed in the butterfly plate on the valve rod; Be provided with movable valve seat between described butterfly plate outer circumferential side and the valve interior wall, and the close position of butterfly plate and movable valve seat is provided with metal o-ring, described metal o-ring is fixed on the butterfly plate with socket head screw by pressing plate; Described movable valve seat cylindrical has seal groove on one side in main pressure-bearing direction, mounting O-shaped rings in the groove; Described butterfly plate, pressing plate, metal o-ring, O type circle form dish plate sealing pair assembly parts jointly; Described valve body arranges positive stop in main pressure-bearing direction and movable valve seat one end in contact face.
Described movable valve seat endoporus through three eccentric processing after, dish plate sealing pair assembly parts precision-fit is in movable valve seat; Hard alloy metal sealing surface by built-up welding in dish plate sealing pair assembly parts Multi-layer sealing face and the movable valve seat closely cooperates together.
Described butterfly plate is fixed on the valve rod with straight pin.
Described butterfly plate outer circumference side edge face be the circular cone inclined-plane with movable valve seat inner side end and tapering identical.
Be respectively arranged with Upper shaft sleeve and Lower shaft sleeve between two ends and the valve body about the described valve rod, described Upper shaft sleeve and Lower shaft sleeve all belong to self oiling bearing; Described valve rod is engaged on the valve body by single direction thrust ball bearing at afterbody.
Also be respectively arranged with filler and bottom on the valve body at two ends about the described valve rod; Described filler top is fixed with Gland, also is provided with sealing gasket between described bottom and the valve body.
Compared to prior art, the utility model butterfly valve has following beneficial effect:
Movable valve seat cylindrical has seal groove on one side in main pressure-bearing direction, and O type coil structures is set.Realization activity valve seat cylindrical and body cavity surface of contact zero revealed sealing, and valve seat and body cavity surface of contact are without revealing requirement when guaranteeing bidirectional pressing.
O type circle adopts the fluorine rubber (FDM) of special processing maximum operation (service) temperature to reach 300 ℃, can not affect because of new structure the usability of three eccentric hard sealed flygates.
Valve body arranges limit structure in main pressure-bearing direction and movable valve seat one end in contact face, and movable valve seat can not produce a large amount of Influence of Displacement sealings when guaranteeing main pressure-bearing pressuring direction, thereby guarantees main pressure-bearing direction sealing.
Valve body self oiling bearing setting up and down makes valve rod can not enter stuckly because of impurity in the pipeline, does not need artificial lubricating oil filling, prevents the valve rod locking, stuck phenomenon.
The valve rod afterbody arranges thrust ball bearing and valve body cooperating structure, reduces the increase of valve rod moment unlatching frictional force, improves the wear-resisting property of valve rod, reduces and opens the rapid opening and closing valve of the better realization of moment of torsion.
Surface hardness and wear resistance are improved by special nitriding treatment in the stem material surface.
Description of drawings
Fig. 1 is the structural front view of the utility model flange Bidirectional pressure hard seal butterfly valve;
Fig. 2 is the left pseudosection of Fig. 1;
Fig. 3 is the partial enlarged drawing of Fig. 2.
Among the figure: 1, bottom; 3, sealing gasket; 4, Bearing housing; 5, single direction thrust ball bearing; 6, Lower shaft sleeve; 7, valve body; 8, movable valve seat; 9, O type circle; 10, valve rod; 11, butterfly plate; 12, straight pin; 13, pressing plate; 14, socket head screw; 15, seal ring; 16, Upper shaft sleeve; 17, filler; 18, Gland; 22, support; 30, twin-stage worm-gear driven device; 31, positive stop.
Embodiment
Relevant detailed description of the present utility model and technology contents cooperate description of drawings as follows, yet accompanying drawing only provides the usefulness of reference with explanation, and the utility model is limited.
According to Fig. 1-shown in Figure 3, flange Bidirectional pressure hard seal butterfly valve comprises valve body 7, is installed in valve rod 10 on the valve body, is installed in the butterfly plate 11 on the valve rod; Be provided with movable valve seat 8 between described butterfly plate outer circumferential side and the valve interior wall, and the close position of butterfly plate and movable valve seat is provided with metal o-ring 15, described metal o-ring is fixed on the butterfly plate by pressing plate 13 usefulness socket head screws 14; Described valve body arranges positive stop 31 in main pressure-bearing direction and movable valve seat one end in contact face.Described movable valve seat cylindrical has seal groove on one side in main pressure-bearing direction, mounting O-shaped rings 9 in the groove; Described butterfly plate, pressing plate, metal o-ring, O type circle form dish plate sealing pair assembly parts jointly.Described movable valve seat endoporus through three eccentric processing after, dish plate sealing pair assembly parts precision-fit is in movable valve seat; Hard alloy metal sealing surface by built-up welding in dish plate sealing pair assembly parts Multi-layer sealing face and the movable valve seat closely cooperates together.Described butterfly plate is fixed on the valve rod with straight pin 12.Described butterfly plate 11 outer circumference side edge face be the circular cone inclined-plane with movable valve seat 8 inner side ends and tapering identical.Be respectively arranged with Upper shaft sleeve 16 and Lower shaft sleeve 6 between two ends and the valve body about the described valve rod, described Upper shaft sleeve and Lower shaft sleeve all belong to self oiling bearing; Described valve rod is engaged on the valve body by single direction thrust ball bearing 5 at afterbody.Also be respectively arranged with filler 17 and bottom 1 on the valve body at two ends about the described valve rod; Described filler top is fixing with Gland 18, also is provided with sealing gasket 3 between described bottom and the valve body.Described valve body upper end is connected with twin-stage worm-gear driven device 30 by support 22, and this twin-stage worm-gear driven device acts on the valve rod upper end and drives stem movement.
The butterfly valve metal o-ring is fixed by bolts on the butterfly plate by pressing plate, on one side movable valve seat cylindrical has seal groove in main pressure-bearing direction, O type coil structures is set.Realization activity valve seat cylindrical and body cavity surface of contact zero revealed sealing, and valve seat and body cavity surface of contact are without revealing requirement when guaranteeing bidirectional pressing.
Movable valve seat endoporus through three eccentric processing after, dish plate sealing pair assembly parts precision-fit is in movable valve seat.Hard alloy metal sealing surface by built-up welding in dish plate assembly parts Multi-layer sealing face and the movable valve seat closely cooperates together, realizes that dish plate sealing pair gravity fixed valve base can not produce large displacement.Fly out because manifold pressure raises suddenly for valve uses the security activity valve seat, have with a certain distance from movable valve seat at the uniform positive stop that is provided with of secondary pressure-bearing direction, can not fix movable valve seat.When both direction was exerted pressure, movable valve seat can be movable, can automatically regulate compression seal face position, alleviates any pressure concentration of sealing surface.Make the uniform pressurized of sealing surface, thereby guarantee seal pressure, alleviate the leakage of exerting pressure and producing.Thereby reach the requirement of the sealing load malleation back-pressure of Bidirectional pressure, satisfy the two way sealed effect.
Movable valve seat bidirectional sealed butterfly valve is realized the two way sealed requirement than common one-way sealing butterfly valve.Therefore the use that can replace ball valve in the water return pipeline reduces cost.With three eccentric hard sealed flygate costs of the ordinary construction advantage such as be more or less the same.
Movable valve seat pile-up welding hard alloy STL sealing surface adopts special welding procedure, can not make because of built-up welding the deformation effect O RunddichtringO sealability of movable valve seat generation, and sealing effect is good.
The above only is preferred embodiment of the present utility model, and non-in order to limit claim of the present utility model, other use the equivalence of patent spirit of the present utility model to change, and all should all belong to claim of the present utility model.

Claims (6)

1. flange Bidirectional pressure hard seal butterfly valve comprises valve body, is installed in valve rod on the valve body, is installed in the butterfly plate on the valve rod; It is characterized in that, be provided with movable valve seat between described butterfly plate outer circumferential side and the valve interior wall, and the close position of butterfly plate and movable valve seat is provided with metal o-ring, described metal o-ring is fixed on the butterfly plate with socket head screw by pressing plate; Described movable valve seat cylindrical has seal groove on one side in main pressure-bearing direction, mounting O-shaped rings in the groove; Described butterfly plate, pressing plate, metal o-ring, O type circle form dish plate sealing pair assembly parts jointly; Described valve body arranges positive stop in main pressure-bearing direction and movable valve seat one end in contact face.
2. flange Bidirectional pressure hard seal butterfly valve according to claim 1 is characterized in that, described movable valve seat endoporus through three eccentric processing after, dish plate sealing pair assembly parts precision-fit is in movable valve seat; Hard alloy metal sealing surface by built-up welding in dish plate sealing pair assembly parts Multi-layer sealing face and the movable valve seat closely cooperates together.
3. flange Bidirectional pressure hard seal butterfly valve according to claim 1 is characterized in that described butterfly plate is fixed on the valve rod with straight pin.
4. flange Bidirectional pressure hard seal butterfly valve according to claim 1 is characterized in that, described butterfly plate outer circumference side edge face be the circular cone inclined-plane with movable valve seat inner side end and tapering identical.
5. flange Bidirectional pressure hard seal butterfly valve according to claim 1 is characterized in that, is respectively arranged with Upper shaft sleeve and Lower shaft sleeve between two ends and the valve body about the described valve rod, and described Upper shaft sleeve and Lower shaft sleeve all belong to self oiling bearing; Described valve rod is engaged on the valve body by single direction thrust ball bearing at afterbody.
6. flange Bidirectional pressure hard seal butterfly valve according to claim 1 is characterized in that, also is respectively arranged with filler and bottom on the valve body at two ends about the described valve rod; Described filler top is fixed with Gland, also is provided with sealing gasket between described bottom and the valve body.
CN 201220392863 2012-08-09 2012-08-09 Flange two-way pressure hard sealing butterfly valve Expired - Fee Related CN202733009U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220392863 CN202733009U (en) 2012-08-09 2012-08-09 Flange two-way pressure hard sealing butterfly valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220392863 CN202733009U (en) 2012-08-09 2012-08-09 Flange two-way pressure hard sealing butterfly valve

Publications (1)

Publication Number Publication Date
CN202733009U true CN202733009U (en) 2013-02-13

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Family Applications (1)

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CN 201220392863 Expired - Fee Related CN202733009U (en) 2012-08-09 2012-08-09 Flange two-way pressure hard sealing butterfly valve

Country Status (1)

Country Link
CN (1) CN202733009U (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103498943A (en) * 2013-09-04 2014-01-08 北京艺创阀门制造有限公司 Double-direction pressure rigidity seal butterfly valve of long support structure with rolling friction
CN103615550A (en) * 2013-11-04 2014-03-05 乐清市阀门厂 Marine center type multilayer hard sealing butterfly valve
CN105156698A (en) * 2015-08-17 2015-12-16 王志强 Super-hard both-way sealing butterfly valve
CN105299285A (en) * 2015-11-11 2016-02-03 上海东宝阀门制造有限公司 Three-eccentric bidirectional all-metal hard-seal butterfly valve
CN108980376A (en) * 2018-08-07 2018-12-11 王中杰 Double plate double-valve-seat bidirectional metals or the butterfly valve of nonmetallic sealing
CN115013546A (en) * 2022-07-14 2022-09-06 良工阀门集团有限公司 Two-way seal structure and butterfly valve
CN115264087A (en) * 2022-09-28 2022-11-01 江苏大田阀门制造有限公司 Three-eccentric butterfly valve capable of being sealed in two directions

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103498943A (en) * 2013-09-04 2014-01-08 北京艺创阀门制造有限公司 Double-direction pressure rigidity seal butterfly valve of long support structure with rolling friction
CN103615550A (en) * 2013-11-04 2014-03-05 乐清市阀门厂 Marine center type multilayer hard sealing butterfly valve
CN105156698A (en) * 2015-08-17 2015-12-16 王志强 Super-hard both-way sealing butterfly valve
CN105299285A (en) * 2015-11-11 2016-02-03 上海东宝阀门制造有限公司 Three-eccentric bidirectional all-metal hard-seal butterfly valve
CN108980376A (en) * 2018-08-07 2018-12-11 王中杰 Double plate double-valve-seat bidirectional metals or the butterfly valve of nonmetallic sealing
CN115013546A (en) * 2022-07-14 2022-09-06 良工阀门集团有限公司 Two-way seal structure and butterfly valve
CN115013546B (en) * 2022-07-14 2023-03-14 良工阀门集团有限公司 Two-way seal structure and butterfly valve
CN115264087A (en) * 2022-09-28 2022-11-01 江苏大田阀门制造有限公司 Three-eccentric butterfly valve capable of being sealed in two directions

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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: 20130213

Termination date: 20180809

CF01 Termination of patent right due to non-payment of annual fee