CN203202254U - Double-eccentric and bidirectional metallic seal butterfly valve - Google Patents

Double-eccentric and bidirectional metallic seal butterfly valve Download PDF

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Publication number
CN203202254U
CN203202254U CN 201320073546 CN201320073546U CN203202254U CN 203202254 U CN203202254 U CN 203202254U CN 201320073546 CN201320073546 CN 201320073546 CN 201320073546 U CN201320073546 U CN 201320073546U CN 203202254 U CN203202254 U CN 203202254U
Authority
CN
China
Prior art keywords
valve
sealing
valve seat
butterfly
eccentric
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 201320073546
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Chinese (zh)
Inventor
林益东
郑定义
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.)
CHINA ZHEJIANG ZHONGGONG VALVE GROUP Co Ltd
Original Assignee
CHINA ZHEJIANG ZHONGGONG VALVE GROUP 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 CHINA ZHEJIANG ZHONGGONG VALVE GROUP Co Ltd filed Critical CHINA ZHEJIANG ZHONGGONG VALVE GROUP Co Ltd
Priority to CN 201320073546 priority Critical patent/CN203202254U/en
Application granted granted Critical
Publication of CN203202254U publication Critical patent/CN203202254U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a double-eccentric and bidirectional metallic seal butterfly valve which comprises a valve body, a butterfly plate, a valve rod, a valve seat, a sealing piece and an installing piece. The double-eccentric and bidirectional metallic seal butterfly valve is mainly characterized in that the cross section of the valve seat is in the shape of S, and soft sealing padding made of elastic rubber material is arranged between the S-shaped valve seat and the valve body. When the valve is stressed by reversed pressure, fluid pressure compresses the elastic rubber, therefore, the S-shaped tapered valve seat sealing face and the butterfly plate tapered sealing face can be sealed better, the tolerance zone between a shaft sleeve and the valve body is compensated automatically, elastic deformation of the valve rod under the pressure of media is compensated automatically, and the poor sealing problem existing in the bidirectional exchange medium conveying process of the valve is solved. In addition, the contact portion of the valve seat sealing face and the media and the contact portion of the butterfly plate sealing face and the media are made of metal materials, the sealing faces can be prevented from being eroded by the media, and therefore bidirectional sealing performance is achieved. Furthermore, the double-eccentric and bidirectional metallic seal butterfly valve is reliable in sealing performance, long in service life, and suitable for being used in bidirectional medium pipelines.

Description

Two eccentric two-way metallic sealing butterfly valves
Technical field
The utility model relates to a kind of metallic sealing butterfly valve, particularly about a kind of pair of eccentric two-way pressure-bearing metal seal butterfly valve.
Background technique
The hard seal butterfly valve of producing both at home and abroad at present and using is divided into elastic sealing structure and multi-level sealing configuration substantially.The elastic sealing structure butterfly valve relying on the elastic seal ring on the valve body to deform under the valve closing state, reaches interference fit and realizes sealing function.Its major defect is: in using process opened and closed frequently, the elastic packing loop material fatigue occurred easily and follows the string, and does not reach seal request; Elastic seal ring is easily annealed phenomenon and is out of shape under the worst hot case, does not reach seal request; Sealing pair is linear sealing, and working life and scope are restricted.The butterfly valve of multi-level sealing configuration, the sealing pair on its butterfly plate is formed by the alternate gummed with the rubber asbestos material of metallic material, and " during state, velocity of medium descends the valve seal performance to the erosion that the rubber asbestos produce when the butterfly plate unlatching is in 90.So the butterfly valve of these two kinds of structures all exists sealability unreliable, the problem that working life is short.And majority is unidirectional pressure-bearing, namely only allows medium from a side inflow of valve, and under the working state of reverse media pressure, along with the increase of pressure, when the unit positive pressure between butterfly plate and the valve seat during less than medium pressure, sealing pair just begins to leak.For this reason, publication number is " a kind of high-performance three eccentric two-way metal hard-sealing butterfly valve " of CN2545434, and its valve seat insert is made up of soft T RunddichtringO and both sides multilayer stainless steel sheets, and the sealing surface of valve plate and valve seat is the oblique cone structure; Between the regulating ring that cooperates with seal ring and pressing plate, be provided with one by the Regulation spring of regulating bolt control, compensated tolerance range and the resiliently deformable of valve rod under pressure medium between axle sleeve and the valve body, solved the sealing problem that valve exists in the medium transport process of two-way exchange.But its shortcoming is: valve seat insert is made up of soft T RunddichtringO and both sides multilayer stainless steel sheets, and under valve opening state, the forward MEDIA FLOW can produce soft T RunddichtringO washes away, and uses sealability to descend for a long time, influences working life; Both sides adopt the multilayer stainless steel sheets to constitute hard seal valve seat, and complex structure is difficult to guarantee the craft precision of sealing surface, and sealability is unreliable.
Summary of the invention
The purpose of this utility model is the shortcoming that exists at prior art, and a kind of bidirectional bearing that has is provided, and is simple in structure, sealability reliable, two eccentric two-way metallic sealing butterfly valves of long service life.
The technological scheme that realizes the utility model purpose comprises valve body, butterfly plate, valve rod, valve seat and Sealing and assembling set, valve rod center line and butterfly plate sealing surface and valve channel center line have offset respectively, valve seat has the conical seal (contact) face that cooperatively interacts with the butterfly plate sealing surface, be installed on the valve body by gland, the sectional shape that mainly is valve seat is S shape, between S shape valve seat and valve body soft sealed packing is set.
In above technological scheme, gland is press-fited on valve body by screw, is provided with stuffing box packing between itself and the valve seat, and and valve body between leave compensate for clearance.
In above technological scheme, the butterfly plate sealing surface is installed on the butterfly plate through pressing plate by a seal ring to be formed.
The utility model advantage compared with prior art is: the valve seat insert of S shape with the soft sealed packing envelope between its sealing surface and valve body, this soft sealed packing is elastic rubber material, when valve is subjected to backpressure, hydrodynamic pressure pressure elasticity rubber, make S shape conical valve seat sealing surface and butterfly plate conical seal (contact) face reach better sealing, automatically tolerance range and the resiliently deformable of valve rod under pressure medium between axle sleeve and the valve body have been compensated, solve the sealing problem that valve exists in the medium transport process of two-way exchange, had the two way sealed function; No matter be valve opening or closed condition, sealing surface of seat and butterfly plate sealing surface and medium contact segment all are metallic material, have solved the prior art sealing surface and have been subjected to medium to wash away problem, it is simple in structure, machining accuracy guarantees that easily it is reliable to have sealability, characteristics such as long service life.
Description of drawings
Fig. 1 is structure sectional view of the present utility model.
Fig. 2 is I portion structure enlarged view among the utility model Fig. 1.
Embodiment
Two eccentric two-way metallic sealing butterfly valves as shown in Figure 1, comprise valve body 1, butterfly plate 2, valve rod 3, valve seat 4 and Sealing and assembling set, valve rod 3 center lines and butterfly plate 2 sealing surfaces and valve body 1 channel centerline have offset respectively, valve seat 4 has the conical seal (contact) face that cooperatively interacts with butterfly plate 2 sealing surfaces, be installed on the valve body 1 by gland 5, the sectional shape of valve seat 4 is S shape, between valve seat 4 and valve body 1 soft sealed packing 6 is set.Described soft sealed packing 6 is the seal ring of elastic rubber material, and soft sealed packing 6 envelopes that this elastic rubber material is made are between its valve seat 4 sealing surfaces and valve body 1.Valve seat 4 sealing surfaces have the conical seal (contact) face that cooperatively interacts with butterfly plate 2 sealing surfaces, and butterfly plate 2 sealing surfaces are installed on the butterfly plate 2 through pressing plate 8 by a seal ring 7 to be formed.Described gland 5 is press-fited on valve body 1 by screw 10, and and valve body 1 between leave compensate for clearance 11, the stuffing box packing 9 of rubber material is housed between gland 5 and the valve seat 4.When valve is subjected to backpressure, because between gland 5 and the valve body 1 gapped 11, can axial float, reverse media pressure acts on the valve seat 4 of S shape by gland 5, gum filler 9, with soft sealed packing 6 compressions, make the conical seal (contact) face of S shape conical valve seat sealing surface and butterfly plate seal ring reach better sealing, automatically compensated tolerance range and the resiliently deformable of valve rod 3 under pressure medium between axle sleeve and the valve body 1, solved the sealing problem that valve exists in the medium transport process of two-way exchange.When valve was subjected to positive pressure, pressure medium promoted butterfly plate 2, and its seal ring 7 and the sealing surface of valve seat 4 are sealed more.

Claims (3)

1. two eccentric two-way metallic sealing butterfly valve, comprise valve body (1), butterfly plate (2), valve rod (3), valve seat (4) and Sealing and assembling set, valve rod (3) center line and butterfly plate (2) sealing surface and valve body (1) channel centerline have offset respectively, valve seat (4) has the conical seal (contact) face that cooperatively interacts with butterfly plate (2) sealing surface, be installed on the valve body (1) by gland (5), the sectional shape that it is characterized in that valve seat (1) is S shape, between S shape valve seat (4) and valve body (1) soft sealed packing (6) is set.
2. according to claim 1 pair of eccentric two-way metallic sealing butterfly valve is characterized in that gland (5) is press-fited on valve body (1) by screw (10), is provided with stuffing box packing (9) between itself and the valve seat (4), and and valve body (1) between leave compensate for clearance (11).
3. according to claim 1 and 2 pair of eccentric two-way metallic sealing butterfly valve is characterized in that butterfly plate
(2) sealing surface is installed on the butterfly plate (2) through pressing plate (8) by a seal ring (7) and forms.
CN 201320073546 2013-02-02 2013-02-02 Double-eccentric and bidirectional metallic seal butterfly valve Expired - Fee Related CN203202254U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320073546 CN203202254U (en) 2013-02-02 2013-02-02 Double-eccentric and bidirectional metallic seal butterfly valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320073546 CN203202254U (en) 2013-02-02 2013-02-02 Double-eccentric and bidirectional metallic seal butterfly valve

Publications (1)

Publication Number Publication Date
CN203202254U true CN203202254U (en) 2013-09-18

Family

ID=49146363

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201320073546 Expired - Fee Related CN203202254U (en) 2013-02-02 2013-02-02 Double-eccentric and bidirectional metallic seal butterfly valve

Country Status (1)

Country Link
CN (1) CN203202254U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104019243A (en) * 2014-06-17 2014-09-03 上海冠龙阀门机械有限公司 Butterfly valve with bi-directional sealing device
CN104964047A (en) * 2015-07-02 2015-10-07 中山铁王流体控制设备有限公司 Dual-angle three-eccentricity hard sealing butterfly valve
CN110410509A (en) * 2019-07-22 2019-11-05 凯斯特阀门集团有限公司 A kind of butterfly valve plate seal protecting device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104019243A (en) * 2014-06-17 2014-09-03 上海冠龙阀门机械有限公司 Butterfly valve with bi-directional sealing device
CN104964047A (en) * 2015-07-02 2015-10-07 中山铁王流体控制设备有限公司 Dual-angle three-eccentricity hard sealing butterfly valve
CN110410509A (en) * 2019-07-22 2019-11-05 凯斯特阀门集团有限公司 A kind of butterfly valve plate seal protecting device

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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: 20130918

Termination date: 20170202

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