KR20110098129A - Multiple eccentric butterfly valve - Google Patents

Multiple eccentric butterfly valve Download PDF

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Publication number
KR20110098129A
KR20110098129A KR1020100017588A KR20100017588A KR20110098129A KR 20110098129 A KR20110098129 A KR 20110098129A KR 1020100017588 A KR1020100017588 A KR 1020100017588A KR 20100017588 A KR20100017588 A KR 20100017588A KR 20110098129 A KR20110098129 A KR 20110098129A
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KR
South Korea
Prior art keywords
valve
seat ring
disc
valve body
sealing
Prior art date
Application number
KR1020100017588A
Other languages
Korean (ko)
Inventor
이석우
Original Assignee
한국유니콤밸브주식회사
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Publication date
Application filed by 한국유니콤밸브주식회사 filed Critical 한국유니콤밸브주식회사
Priority to KR1020100017588A priority Critical patent/KR20110098129A/en
Publication of KR20110098129A publication Critical patent/KR20110098129A/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
    • F16K1/222—Shaping of 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
    • 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
    • F16K1/2263—Shaping or arrangements of the sealing the sealing being arranged on the valve seat
    • 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
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/46—Attachment of sealing rings
    • F16K1/465—Attachment of sealing rings to the valve seats
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiple eccentric butterfly valve including three or more, and since the butterfly valve configured inside the valve body to open or close the inside of the valve body is quadruple eccentric, the disk sealing surface of the valve disc and the valve The sealing surface of the seat ring fixed to the body makes uniform sealing by the valve disc, so that the seat ring can be prevented from being quickly worn out or damaged, and the seat ring can be completely and uniformly sealed. The sealing property against temperature and pressure change can be greatly improved, preventing fluid from leaking when the valve disc is blocked, and the sealing surface of the seat ring fixed to the valve body is formed in an arc shape so that the disc sealing face and the seat ring By allowing the sealing surfaces to be in line contact with each other, the sealing and blocking properties can be improved, and Intended to provide a multiple eccentric butterfly valve that at the time of collision of the fluid can reduce the seat ring receiving shock.
To this end, the present invention is a valve body (11) that is a cylindrical fluid passageway, and the valve disk (13) to rotate the fluid within the valve body 11 within a 90 degree angle around the rotation shaft 12 to regulate the flow of fluid And a seat ring 14 for sealing fixed to the valve disc 13 and the valve body 11, the valve disc 13 being primarily eccentric at the centerline of the valve body 11, and again the valve disc. In the butterfly valve in which the rotary shaft 12 rotating the 13 is eccentrically at the center of the valve body 11, and the valve disc 13 is eccentrically, the flow path flowing to the inside of the body 11. From the disc sealing surface 102 formed at the end of the seat ring 14 by eccentric rotation by the angle ß in the direction of the rotation shaft 12 of the valve disc 13 with the central axis 101 in the direction as a reference point The extension line 103 extending to become the center line C of the valve disc Characterized by four-way eccentricity.

Description

Multiple Eccentric Butterfly Valve

The present invention relates to a multiple eccentric butterfly valve including three or more, and more specifically, to triple the eccentric valve disk configuration eccentrically the disk sealing surface of the valve disk and the sealing surface of the seat ring fixed to the valve body uniform By making contact with each other to enable constant sealing by the valve disc, the seat ring can be prevented from being quickly worn or damaged.The sealing property against temperature and pressure changes is greatly increased by the perfect and uniform sealing of the seat ring. It can be improved to prevent the leakage of fluid when the valve disc is blocked, and the sealing surface of the seat ring fixed to the valve body to form an arc so that the line sealing surface and the sealing surface of the seat ring is in contact with each other. By doing so, the sealing property and the blocking property can be improved, and the impact of the seat ring in the event of a collision with the flowing fluid is reduced. Kill relates to a multi-eccentric butterfly valves can.

In general, the butterfly valve is a valve for controlling the opening and closing of the fluid by using a disk-shaped disk that rotates about the valve axis in the cylindrical fluid passage, and in recent years, the triple eccentric butterfly valve is used among the butterfly valve do.

The triple eccentric butterfly valve, as shown in FIG. 1, rotates within 90 degrees of the body 1, which is a cylindrical fluid passageway, and the valve shaft 3 within the body 1 to rotate the fluid flow. The valve disk (2) to adjust and the ring form located at the outer end of the valve disk (2) is composed of a seat ring (4) for sealing the valve disk (2) and the body (1), the seat ring ( 4) is fixed to the valve disc 2 by the sea retainer (6).

The triple eccentric butterfly valve of such a structure is a valve shaft which is a rotation shaft for eccentric the valve disc 2 from the center line a of the valve body 1 to the X side (primary eccentric), and then rotates the valve disc 2 again. (3) eccentrically by Y in the vertical line (b) drawn at the center of the valve body 1 (second eccentricity), and forming a virtual cone formed between the valve disc 2 and the end point O at an arbitrary angle of Z (Third eccentric) It consists of an eccentric valve.

These triple eccentric butterfly valves, including primary eccentric, secondary eccentric, and tertiary eccentric, have improved airtightness of valve disc 2 and seat ring 4 than double eccentric butterfly valves including primary, secondary eccentric.

However, such a conventional triple eccentric butterfly valve has a cross section of the seat ring 4 assembled to the valve disc 2 when the valve disc 2 is opened so that the seat ring 4 is directly exposed to the flow of the fluid. There is a problem that wear occurs easily.

That is, the valve disc 2 rotates by 90 degrees when the valve is opened, and the seat ring 4 also rotates by 90 degrees due to the rotation of the valve disc 2 by 90 degrees. Since the cross section of the c) faces the front of the fluid flow, the cross section of the cit ring 4 directly collides with the fluid, so that the abrasion of the cit ring 4 is severe, and is particularly applicable to high temperature and high pressure fluids. In the case of a valve, this problem becomes more serious.

As this problem occurs, there is a problem that the seat ring 4 may not perform a perfect sealing function in the event of a fire.

In addition, the conventional triple eccentric butterfly valve has a side surface portion of the seat ring (4) in a planar cross-section so that the surface contact between the inner surface (5) of the valve body (1) and the seat ring (4) is in contact with the surface Therefore, the seat ring 4 has a problem in that the area in contact with the flowing fluid becomes wider, so that the seat ring 4 wears faster as the impact with the flowing fluid is increased.

Looking at the prior art, a metal seat type butterfly valve having a tertiary eccentric structure, which is registered Patent No. 10-0367532, has been devised, which is the center line of the valve body in which the valve seat, which is the axis of rotation of the valve disc, is interposed with the seat. The valve which has a eccentric structure which is secondary eccentric by "b" from the A-A 'line which is the flow center line of the valve in the state which eccentrically "a" from the B' line, and closes them between the valve disc and the valve body. In the butterfly valve comprising a seat, the C-C 'line which is the reference axis of the conical valve disc with the reference point "O" which is the intersection of the channel center line and the body center line of the valve in the state where the valve seat has the secondary eccentric structure. Rotate by an arbitrary angle and then move the C-C 'line which is the reference axis by "c".

As another example, a metal seat type butterfly valve having a tertiary eccentric structure, which is registered in Korean Patent No. 10-0387306, has been devised. It has an eccentric structure in which the center line of the seat portion diameter of the valve body is eccentrically "f" from the center line DD 'line which is the rotation axis of the valve in the state which eccentrically "a" from the line, and the seat flow path of the valve in this state. The CC 'line, which is the reference axis of the conical valve disc 12, is rotated by a predetermined angle α with the reference point "0", which is the intersection of the AA' center line and the EE 'line center line of the valve body seat, and then the reference point. The axis CC 'is axially shifted (C 1 -C 1 ′) by “c” to form a triple eccentric structure.

These conventional technologies also, by configuring the valve disk configured in the valve body by the triple eccentricity, the problem that the conventional triple eccentric butterfly valve described above, that is, the problem of the rapid progress of wear phenomenon on the seat ring is solved I can't do it.

Moreover, in the conventional triple eccentric butterfly valve, the valve disc is eccentrically at the center line of the valve body, and the valve shaft, which is a rotation axis for rotating the valve disc, is second eccentrically at the vertical line drawn from the center of the valve body. Since the virtual cones formed between the end points are eccentrically formed at an arbitrary angle, the valve disc is formed in an elliptical shape because the shape of the valve disc is formed in an elliptical shape in which one of the upper / lower part and the left / right part is further opened. The seat ring is also configured to oval because the oval sealing is made, there is a problem that the airtightness is lowered as well as the airtightness.

The present invention has been made to solve the problems of the conventional triple eccentric butterfly valve, the center line extending the disk sealing surface in the rotation shaft direction of the valve disc relative to the central axis of the flow path flow path of the triple eccentric butterfly valve Since the center of the flow path direction is eccentric by an arbitrary angle so that the disk sealing surface of the valve disk and the sealing surface of the seat ring fixed to the valve body are in uniform contact with each other, thereby enabling constant sealing by the valve disk. Not only can the seat ring be prevented from being worn out or damaged quickly, but the seal can be greatly improved against temperature and pressure changes due to the perfect and uniform sealing of the seat ring. And the sealing surface of the seat ring fixed to the valve body is formed into an arc shape. By sealing the sealing surface of the sealing surface and the seat ring, the sealing and blocking properties can be improved, and the multiple eccentric including triplet or more can reduce the impact of the seat ring when colliding with the flowing fluid. Its purpose is to provide a butterfly valve.

The multi-eccentric butterfly valve of the present invention as a means for achieving the above object is a valve body which is a cylindrical fluid passage, and a valve disk for controlling the flow of fluid by rotating within a 90 degree angle around the rotary shaft in the valve body; It is composed of a seat ring for sealing fixed to the valve body, the valve disk is the primary eccentric at the center line of the valve body, the rotating shaft for rotating the valve disk again secondary eccentric at the center of the valve body, In the third eccentric butterfly valve, the center line of the valve disc has an extension line extending from the disc sealing surface by eccentric rotation by an angle in the rotation shaft direction of the valve disc, with the central axis in the flow path direction flowing inside the valve body as a reference point. To be eccentric to be done.

The sealing surface of the seat ring fixed to the valve body in contact with the valve disk is formed to be round, the disk sealing surface contacting the sealing surface of the seat ring fixed to the valve body is to be in line contact with the sealing surface of the seat ring. Formed.

In addition, the sheet ring, a metal sheet and a graphite sheet (graphite) are sequentially stacked, the outer side of the sheet ring is configured to be laminated so that the metal sheet, respectively.

The inventors of the present invention have a multi-eccentric butterfly valve which has a quadruple eccentric butterfly valve configured inside the valve body to open or close the inside of the valve body, thus sealing the disk sealing surface of the valve disc and the seat ring fixed to the valve body. By making the surface uniformly contact, it is possible to prevent the wear and damage of the seat ring quickly by the constant sealing by the valve disc, and the sealing property against temperature and pressure change by the perfect and uniform sealing of the seat ring. This can be greatly improved to prevent leakage of fluid when the valve disc is blocked, and the sealing surface of the seat ring fixed to the valve body is formed in an arc shape so that the line sealing surface and the sealing surface of the seat ring are in contact with each other. Sealability and barrier properties can be improved, and the seat ring is subjected to a collision with the flowing fluid. It can reduce the price.

1 is a configuration diagram showing a conventional triple eccentric butterfly valve configuration.
Figure 2 is a block diagram showing the configuration of the present inventors quadruple eccentric butterfly valve.
Figure 3 is a block diagram showing the seating structure of the present inventors quadruple eccentric butterfly valve.
Figure 4 is a block diagram of a state in which the seat ring of the present inventors eccentric butterfly valve is in close contact with the valve body.

Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to the accompanying drawings. In describing the present invention, the term or word used in the present specification and claims is based on the principle that the inventor can appropriately define the concept of the term in order to best describe the invention of his or her own. It should be interpreted as meanings and concepts corresponding to the technical idea of

In describing the multiple eccentric butterfly valve according to the present invention, the same technology as in the prior art will be described with the same name.

As shown, the multi-eccentric butterfly valve of the present invention rotates within 90 degrees of the valve body 11, which is a cylindrical fluid passage, and the rotation shaft 12 in the valve body 11 to flow the fluid. It consists of a valve disk 13 for adjusting and a seat ring 14 for sealing fixed to the valve body (11).

The valve disc 13 is primarily eccentric at the center line of the valve body 11, and the rotary shaft 12 for rotating the valve disc 13 is second eccentric at the center of the valve body 11 so that the valve disc ( 13) is eccentrically rotated and eccentrically rotated by the angle ß in the direction of the rotation shaft 12 of the valve disc 13 with the central axis 101 in the flow path direction flowing inside the valve body 11 as a reference point. By making the extension line 103 extend from the disc sealing surface 11a so that it may become the center line C of a valve disc, it will be made eccentrically.

As such, the center line C of the valve disc 13 is formed by the extension line 103 extending from the disc sealing surface 11a, so that the flow and blocking of the fluid formed inside the valve body 11 can be achieved. Abrasion can be minimized to the seat ring 14 fixed to the valve disc 13 and the valve body 11 rotated at an angle of 90 degrees.

That is, in the case of the conventional triple eccentric valve disk, the contact surface of the seat ring has a strong force in order to prevent the leakage between the sealing surface of the valve body in contact with the seat ring and the disk sealing surface of the seat ring to enhance the adhesion. Excessive force acts on the left and right or top and bottom of the valve disc because it is pressed, and the seat ring of the valve disc in which the excessive force is applied is also excessively pressed, so that the left and right or top and bottom surfaces wear more quickly than other parts. Is eccentrically rotated by the angle ß in the direction of the rotation shaft 12 of the valve disc 13 with respect to the central axis 101 in the flow path direction flowing toward the inner side of the body 11 from the disc sealing surface 11a. By extending the extension line 103 is constituted by the fourth eccentric so as to be the center line (C) of the valve disk, the right and left upper and lower surfaces of the valve disk 13, Hit evenly's force may be any one acting portion is typically press further deviation phenomenon is prevented that by being pressed can be prevented from variation in wear ring seat (14).

In other words, according to the present invention, since the valve disk 13 is eccentrically formed into a quadruple including three or more, the pressing surface of the seat ring 14 may be acted evenly against the upper and lower sides and the left and right surfaces thereof. 102 can be pressed with the same force by the disk sealing surface 11a of the valve disk 13, and the sealing surface 102 of the seat ring 14 is the disk sealing surface 11a of the valve disk 13. Since the uniform adhesion force against, the leakage of the fluid can be blocked.

As described above, the multi-eccentric butterfly valve according to the present invention has a sealing surface 102 of the seat ring 14 with respect to the disk sealing surface 11a of the valve disk 13 as the valve disk 13 is eccentrically configured. Since it is evenly contacted by the same pressure), it is possible to prevent the leakage of the fluid due to the deviation wear of the seat ring 14 as well as to shorten the life of the seat ring (14).

In addition, in the present invention, the multi-eccentric butterfly valve, the sealing surface 102 of the seat ring 14 formed on the end side of the seat ring 14 is formed to be rounded arc-shaped, the sealing of the seat ring 14 The disk sealing surface 11a, which is in contact with the surface 102 and is a contact surface of the valve disk 13, is formed to be inclined, so that the sealing surface 102 and the disk sealing surface 11a of the seat ring 14 are in line contact. Since it is comprised so that the contact force and adhesive force of the sealing surface 102 and the disk sealing surface 11a of the seat ring 14 can be made more firm, the water tightness of a fluid can be improved.

Furthermore, since the valve disk 13 is configured to be eccentrically configured in the present invention, the eccentric butterfly valve of the present invention may have a circular shape of the valve disk 13 and thus the seat ring 14 may be formed in a circular shape. Since the sealing is made of a circular seal, it is possible to solve the problem that the sealing performance caused by the oval sealing is lowered as well as the airtightness is deteriorated due to the conventional triple eccentric butterfly valve constituted by the third eccentric.

The seat ring 14 may be configured so that two adjusting bolts 203 press the seat ring 14 in the screw hole 202 of the retaining ring 201, thereby adjusting the two adjusting bolts 203. By adjusting the pressing force of the seat ring 14 freely, the sealing point of the seat ring and the valve disc can be adjusted precisely, and the upper adjustment bolt prevents the loosening of the lower adjustment bolt, thereby enabling more robust installation. Do.

In addition, the sheet ring 14 is a metal sheet 14a and the graphite sheet 14b are sequentially stacked, the outer side of the sheet ring 14 is configured to be laminated so that the metal sheet 14a is located respectively.

Therefore, since the cit ring 14 is formed of a double sheet of metal and graphite, life extension and wear on the cit ring 14 can be minimized.

The metal sheet 14a can exert an excellent sealing effect even in an ultra low temperature, high temperature, or high pressure environment, and performs a perfect sealing function by the material of the metal sheet 14a even in the event of a fire.

In addition, the graphite sheet 14b is a soft material that can be used according to the environment by using a fluorine resin or rubber, and the graphite sheet 14b operates during the rotation operation of the valve disc 13 by the graphite sheet 14b. Since the soft graphite sheet 14b seals the insufficient sealing portion of the metal sheet 14a, the sealing effect is greatly increased.

On the other hand, the seat ring 14 is not only a quadruple eccentric butterfly valve, but also a primary eccentric butterfly valve, a secondary eccentric butterfly valve including a primary eccentric, a primary ring and a third eccentric butterfly valve including a secondary eccentric. By forming the sealing surface 102 of the arc-shaped round shape, the disk sealing surface 11a of the valve disk 13 and the sealing surface 102 of the seat ring 14 may be configured to be in line contact.

11 valve body 11a disk sealing surface
12: rotary shaft 13: valve disc
14: sheeting 14a: metal sheet
14b: graphite sheet 101: the central axis
102: sealing surface 103: extension line
C: centerline

Claims (3)

The valve body 11, which is a cylindrical fluid passage, and the valve disk 13 and the valve disk 13, which rotate within an angle of 90 degrees around the rotary shaft 12 in the valve body 11 to control the flow of the fluid. ) And the seat ring 14 for sealing fixed to the valve body 11,
The valve disc 13 is eccentrically at the center line of the valve body 11, and the rotary shaft 12 for rotating the valve disc 13 is second eccentrically at the center of the valve body 11 so that the valve disc ( In the butterfly valve with the third eccentricity 13),
The seat ring 14 may be eccentrically rotated by an angle ß in the direction of the rotation shaft 12 of the valve disc 13 with the central axis 101 in the flow path direction flowing toward the inside of the valve body 11 as a reference point. Multiple eccentric butterfly valve, characterized in that the extension line 103 extending from the sealing surface 102 formed on the end side is made eccentrically so as to become the center line (C) of the valve disc. The method according to claim 1,
The sealing surface 102 formed at the end side of the seat ring 14 is formed to be round in an arc shape,
The disk sealing surface 11a, which is in contact with the sealing surface 102 of the seat ring 14 and the contact surface of the valve disk 13, is formed to be inclined,
The eccentric butterfly valve, characterized in that the sealing surface 102 and the disk sealing surface (11a) of the seat ring 14 is configured to be in line contact. The method according to claim 1,
The sheet ring 14 is a metal sheet 14a and the graphite sheet 14b are sequentially stacked,
The outer side of the seat ring 14, the eccentric butterfly valve, characterized in that the metal sheet (14a) is laminated so that each position.
KR1020100017588A 2010-02-26 2010-02-26 Multiple eccentric butterfly valve KR20110098129A (en)

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KR1020100017588A KR20110098129A (en) 2010-02-26 2010-02-26 Multiple eccentric butterfly valve

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KR20110098129A true KR20110098129A (en) 2011-09-01

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103759027A (en) * 2014-02-13 2014-04-30 江苏神通阀门股份有限公司 Five-eccentric butterfly valve
KR20170037432A (en) 2015-09-25 2017-04-04 (주) 포엠엔지니어링 Triple eccentric butterfly valve having resilient airtight structure
KR101916006B1 (en) 2018-06-27 2019-01-30 (주) 삼진정밀 Eccentric bi-directional butterfly valve with watertight structure of movable body seat
KR102067132B1 (en) * 2018-08-28 2020-01-15 주식회사 코에그 Butterfly valve having quadruple eccentric structure
CN110953354A (en) * 2019-12-23 2020-04-03 河源孚罗泰自控阀门有限公司 Four-eccentric butterfly valve
KR102268251B1 (en) 2020-12-10 2021-06-23 한국유니콤밸브주식회사 Butterfly valve with quintuple offset structure
CN114623246A (en) * 2021-12-24 2022-06-14 浙江国泰萧星密封材料股份有限公司 Sealing gasket special for triple eccentric butterfly valve and manufacturing method thereof
CN114704652A (en) * 2022-05-05 2022-07-05 德科隆（无锡）流体控制有限公司 Six-dimensional eccentric valve sealing structure

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103759027A (en) * 2014-02-13 2014-04-30 江苏神通阀门股份有限公司 Five-eccentric butterfly valve
KR20170037432A (en) 2015-09-25 2017-04-04 (주) 포엠엔지니어링 Triple eccentric butterfly valve having resilient airtight structure
KR101916006B1 (en) 2018-06-27 2019-01-30 (주) 삼진정밀 Eccentric bi-directional butterfly valve with watertight structure of movable body seat
KR102067132B1 (en) * 2018-08-28 2020-01-15 주식회사 코에그 Butterfly valve having quadruple eccentric structure
CN110953354A (en) * 2019-12-23 2020-04-03 河源孚罗泰自控阀门有限公司 Four-eccentric butterfly valve
CN110953354B (en) * 2019-12-23 2021-10-15 河源孚罗泰自控阀门有限公司 Four-eccentric butterfly valve
KR102268251B1 (en) 2020-12-10 2021-06-23 한국유니콤밸브주식회사 Butterfly valve with quintuple offset structure
CN114623246A (en) * 2021-12-24 2022-06-14 浙江国泰萧星密封材料股份有限公司 Sealing gasket special for triple eccentric butterfly valve and manufacturing method thereof
CN114704652A (en) * 2022-05-05 2022-07-05 德科隆（无锡）流体控制有限公司 Six-dimensional eccentric valve sealing structure

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