KR20160074192A - Butterfly valve - Google Patents

Butterfly valve Download PDF

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Publication number
KR20160074192A
KR20160074192A KR1020140183194A KR20140183194A KR20160074192A KR 20160074192 A KR20160074192 A KR 20160074192A KR 1020140183194 A KR1020140183194 A KR 1020140183194A KR 20140183194 A KR20140183194 A KR 20140183194A KR 20160074192 A KR20160074192 A KR 20160074192A
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KR
South Korea
Prior art keywords
disk
seat ring
hole
butterfly valve
imaginary line
Prior art date
Application number
KR1020140183194A
Other languages
Korean (ko)
Inventor
이재성
Original Assignee
한국유니콤밸브주식회사
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 한국유니콤밸브주식회사 filed Critical 한국유니콤밸브주식회사
Priority to KR1020140183194A priority Critical patent/KR20160074192A/en
Publication of KR20160074192A publication Critical patent/KR20160074192A/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
    • 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
    • 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
    • F16K1/42—Valve seats

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

Abstract

The disk unit includes a valve body having a through hole through which a fluid flows, a disk having a circular disk and a rotating shaft hole into which a shaft for providing a rotating force is inserted at one side of the disk, A butterfly valve comprising a seat ring disposed in contact with an outer circumferential surface of a disk to seal the through hole, characterized in that when the butterfly valve is viewed from above, a central axis in the flow direction of the fluid passing through the through hole is a And a vertical axis passing through a center of the valve body is a b, the disk portion is disposed at a position spaced apart from the disk a by a rotation axis of the rotary shaft hole located at the b- The vertex of the imaginary cone c extending from the outer circumferential surface of the seat ring and the contact surface of the seat ring is provided on the a The.

Description

Butterfly Valve {BUTTERFLY VALVE}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a butterfly valve capable of bidirectional flow control, and more particularly, to a butterfly valve having improved watertightness and durability by improving a triple eccentric structure.

The butterfly valve is disposed between pipes that are the flow paths of the fluid or gas, and is used to control the flow of the fluid or gas by opening or closing the pipe in whole or in part.

FIG. 1 is a top view of a conventional triple eccentric butterfly valve, and FIG. 2 is a view showing the arrangement of a disk with respect to a valve body in a conventional triple eccentric butterfly valve.

Such a conventional triple eccentric butterfly valve 10 includes a valve body 11, a disk 12 and a seat ring 13.

Here, the valve body 11 has a substantially cylindrical inner circumferential surface and a through hole 11a through which gas or fluid flows at the center. The disk 12 has a shaft (not shown) at the center of one side thereof And a rotary shaft hole 12a is formed to receive the opening and closing force from the shaft.

Here, a is a central axis in the flow direction of the fluid passing through the through-hole 11a, a is perpendicular to the a, and a vertical axis passing through the center of the valve body 11 is b, a conventional butterfly valve (10) is implemented as follows.

First, the center of the disk 12 is primarily eccentric to the a-axis. That is, the center of the rotation shaft hole 12a formed at the center of the disk 12 and the center of the through hole 11a of the valve body 11 are configured to be parallel to the flow direction of the fluid.

Second, the center of the disk 12 is secondarily eccentrically deformed with respect to the b-axis. That is, the center of the outer peripheral surface of the circular disk 12 is arranged horizontally with the center of the inner peripheral surface of the circular through hole 11a.

Third, the imaginary cone (c) formed by the outer circumferential surface of the disk (12) is eccentric to one side to form the outer circumferential surface of the disk (12).

This triple eccentric butterfly valve 10 is designed so that the disc 12 and the valve body 11 (precisely the seat ring 13 disposed in the valve body 11) ).

However, the conventional triple eccentric butterfly valve 10 has the following problems.

As shown in FIG. 2, since the shape of the valve disc 12 is formed in an elliptical shape in which either the upper / lower portion or the left / right portion is widened, the seat ring 13 constituted in the elliptically formed valve disc 12 There is a problem that the airtightness is deteriorated as well as the airtightness is deteriorated because the airtight seal is formed by elliptical sealing.

In the case of the triple-eccentric valve disc 12, in order to prevent leakage between the sealing surface of the valve body contacting the seat ring 13 and the sealing surface of the disc 12 of the seat ring 13, An excessive force acts on the left and right or upper and lower surfaces of the valve disc 12 because the contact surface of the seat ring 13 is pressed with a strong force and the seat ring 13 of the valve disc 12, The left and right or upper and lower surfaces can be worn more quickly than the other parts.

In addition, the conventional triple eccentric valve provides line contact with the disc 12 and the seat ring 13. An elliptical structure with such line contact is vulnerable in an environment for controlling the bidirectional flow rate. For example, when the fluid flowing from one side to the other side in which the rotary shaft hole 12a is arranged is referred to as a forward direction d1 and vice versa as a reverse direction d2, the conventional elliptical structure is a reverse direction d2) Leakage will occur even if only 0.1mm is pushed against the flow.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a triple eccentric butterfly valve capable of opening and closing a flow path capable of bidirectional flow while improving watertightness and durability.

According to an aspect of the present invention, there is provided a valve apparatus including a valve body having a through hole through which fluid flows, a circular disk, and a rotary shaft hole into which a shaft for providing a rotational force is inserted, And a seat ring disposed in contact with the outer circumferential surface of the disk to seal the through hole, the butterfly valve comprising: a valve plate And a vertical axis passing through the center of the valve body is perpendicular to the axis a and the vertical axis passing through the center of the valve body is represented by b, the rotating shaft of the rotating shaft hole is positioned on the b- And the vertex of the imaginary cone c extending from the contact surface between the outer circumferential surface of the disk and the seat ring is positioned on the a It provides a butterfly valve.

The angle formed by the imaginary line a and the imaginary cone c may be the same in both busbars.

In addition, the angle formed by the imaginary line a and the virtual line of the cone c may be 20 ° to 40 °.

The angle formed by the imaginary line ab connecting the outer circumferential surface of the disk and the rotation axis of the rotary shaft hole at the contact surface of the seat ring and the imaginary cone c may be 85 ° to 95 °.

Also, both sides of the disc may be formed parallel to each other, and one side of the disc may be formed so as not to be parallel to the imaginary line b.

Further, the center of the disk may be disposed on the imaginary line a.

Further, the outer circumferential surface of the disk may be formed to be in surface contact with the seat ring.

Further, the sheet ring may include at least one of a metal sheet, a graphite sheet and polytetrafluoroethylene (PTFE).

The present invention improves the structure of the valve body and disc so that the disc can be brought into surface contact with the seat ring and also realizes a circular contact that is not elliptical and can realize a virtual cone without eccentricity, The butterfly valve having improved durability can be provided.

1 is a top view of a conventional triple eccentric butterfly valve.
Figure 2 shows the arrangement of the disc relative to the valve body in a conventional triple eccentric butterfly valve.
3 is a top view of a butterfly valve according to an embodiment of the present invention.
4 is a side view of a butterfly valve in accordance with an embodiment of the present invention.
5 illustrates an arrangement of discs for a valve body in a triple eccentric butterfly valve in accordance with an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Unless defined otherwise, all terms used herein are the same as the generic meanings of the terms understood by those of ordinary skill in the art, and where the terms used herein contradict the general meaning of the term, they shall be as defined herein.

It is to be understood, however, that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

FIG. 3 is a top view of a butterfly valve according to an embodiment of the present invention, FIG. 4 is a side view of a butterfly valve in accordance with an embodiment of the present invention, and FIG. 5 is a perspective view of a triple eccentric butterfly valve FIG. 3 is a view showing the arrangement of the disc with respect to the valve body in FIG.

Referring to FIG. 3, a butterfly valve 100 according to an embodiment of the present invention may include a valve body 110, a disc portion 120, and a seat ring 130.

In addition, the embodiment may include a driving unit for providing a driving force for opening and closing the disk unit 120, and the driving unit may include a handle (not shown) and a handle for transmitting the driving force of the handle to the disk unit 120 And a shaft 152 inserted into the rotation shaft hole 122 of the disk unit 120. [

Here, the driving force in accordance with the rotation of the handle in the forward and reverse directions (d2) causes the disk unit 120 to rotate with the shaft 152 by using the shaft 152 as a medium, thereby opening / closing the flow path of the fluid or gas .

The valve body 110 has a substantially cylindrical inner circumferential surface and a through hole 111 through which gas or fluid flows in the center, and can be tightened with a pipe (not shown) by water tightness.

The disk unit 120 can open and close the through hole 111. [ Specifically, the disk unit 120 may include a circular disk 121 and a rotary shaft hole 122 into which a shaft 152 for providing a rotational force is inserted.

Here, the flow of the fluid flowing in the direction opposite to the direction in which the rotation shaft hole 122 is formed is referred to as a forward direction d1 and the direction opposite thereto is referred to as an opposite direction d2.

The seat ring 130 may be disposed to seal the through hole 111 in contact with the outer circumferential surface of the disc 121.

The seat ring 130 may be configured such that the adjustment bolts 137 press the seat rings 130 in the holes of the retaining rings 135 so that the seat rings 130 are rotated by the adjustment bolts 137 The pressing force can be freely adjusted so that the sealing points of the seat ring 130 and the valve disc 121 can be precisely adjusted.

The sheet ring 130 may include at least one of a metal sheet, a graphite sheet, and polytetrafluoroethylene (PTFE). For example, the seat ring 130 may be formed of solid metal in the shape of a thick plate, or may be laminated only with a metal sheet in the form of a thin plate, or may be implemented with polytetrafluoroethylene only. In addition, the seat ring 130 may be formed by stacking a metal sheet and a graphite sheet, or by laminating the three materials.

Here, if the sheet ring 130 is stacked only on the metal sheet and the graphite sheet, the metal sheet and the graphite sheet may be stacked in order, and the outer side of the seat ring 130 may be stacked such that the metal sheets are respectively positioned . Therefore, since the seat ring 130 is constituted by the double sheet of metal and graphite, the durability of the seat ring 130 can be enhanced.

5, in the butterfly valve 100 according to the embodiment of the present invention including such a configuration, the force that the disk 121 is evenly pressed against the entire surface of the seat ring 130 acts The seat ring 130 can be pressed with the same force by the disc 121 and a uniform adhering force can be obtained so that the flow in the forward direction d1 as well as the flow in the reverse direction d2 The leakage of the fluid can be blocked.

The characteristics of the butterfly valve 100 according to the embodiment of the present invention will be described in more detail as follows.

3, when the butterfly valve 100 is viewed from above, the central axis of the fluid flowing through the through-hole 111 is denoted by a, And a vertical axis passing through the center of the valve body 110 is defined as b. Here, the center of the valve body 110 may mean the center of the valve body 110, or may mean the center of the valve body 110.

The imaginary cone that extends from the outer circumferential surface of the disk 121 to the contact surface of the seat ring 130 is defined as c and the outer circumferential surface of the disk 121 and the contact surface of the seat ring 130 define the rotational shaft hole The imaginary line joining the rotation axis r of the rotor 122 is defined as ab.

First, in the disk unit 120 according to the embodiment of the present invention, the rotation axis r of the rotation axis hole 122 is located on the b-axis, and may be disposed at a predetermined distance from the a. That is, the rotation axis r of the disk unit 120 is primarily eccentric.

Second, the vertex of the imaginary cone c extending from the outer circumferential surface of the disk 121 and the contact surface of the seat ring 130 may be located on the a. That is, the center of the disk 121 may be disposed on the imaginary line a.

Third, the angle? 1 between the imaginary line a and the imaginary cone c may be the same in both busbars. Here, the outer circumferential surface of the disk 121 may be inclined so that the angle α 1 formed by the imaginary line a and the imaginary cone c is 20 ° to 40 °.

Fourthly, an angle formed by the imaginary line ab connecting the rotation axis r of the rotation shaft hole 122 and the imaginary line of the virtual cone c at the contact surface between the outer circumferential surface of the disk 121 and the seat ring 130 alpha 2 ) may be from 85 DEG to 95 DEG. Preferably, the angle? 2 formed by the imaginary line ab and the busbars of the imaginary cone c is preferably the same everywhere, more preferably 90 °.

Fifth, both surfaces of the disk 121 are formed parallel to each other, and one surface of the disk 121 may be formed not parallel to the imaginary line b. This structural feature can effectively implement the third feature to create a circular bonding surface.

Sixth, the outer circumferential surface of the disk 121 may be formed to be in surface contact with the seat ring 130. This surface contact is represented by reference numeral 121a in Fig. As shown in FIG. 5, the present invention is not limited to elliptical contact, but may be circularly contacted with respect to all directions, and may be formed so as to make surface contact to improve sealing force. Here, it is preferable that the surface contact with the seat ring 130 at a position where the largest diameter of the inclined outer circumferential surface of the disk 121 is about 80% to 90% with respect to the largest diameter is preferable for a tight sealing force.

Here, the order of precedence over the features is irrelevant.

That is, in the butterfly valve 100 according to the embodiment of the present invention, the rotational axis r of the disc portion 120 is eccentric from the valve body 110, and the disc 121 is parallel to the imaginary line b The outer circumferential surface of the disk 121 is formed so that the disk 121 can be formed symmetrically with respect to the central axis a of the fluid flowing through the through hole 111 of the valve body 110 .

The butterfly valve 100 according to the embodiment of the present invention has an advantage that effectively removes the disadvantages of the conventional triple eccentric valve and has an effective and excellent sealing force against the fluid flowing in both directions.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined by the appended claims. Range and its equivalent range.

100: Butterfly valve 110: Valve body
111: through hole 120: disk portion
121: Disk 122: Rotation shaft hole
130: seat ring a, b, ab: imaginary line
c: hypothetical cone r:

Claims (8)

A disc portion including a circular disc and a rotating shaft hole into which a shaft for providing a rotating force is inserted to one side of the disc to open and close the through hole; A butterfly valve comprising a seat ring disposed in contact with and sealing said through-hole,
When the butterfly valve is viewed from above, a is a central axis in the flow direction of the fluid passing through the through hole, and a vertical axis passing through the center of the valve body and perpendicular to the a is b,
In the disk unit,
A rotation axis of the rotary shaft hole is positioned on the b-th surface,
Wherein a vertex of an imaginary cone (c) extending from an outer circumferential surface of the disk and a contact surface of the seat ring is located on the a.
The method according to claim 1,
Wherein an angle formed by the imaginary line a and the imaginary cone c is formed to be the same in both busbars.
The method according to claim 1,
Wherein the angle formed by the imaginary line a and the busbars of the imaginary cone c is 20 ° to 40 °.
The method according to claim 1,
Wherein an imaginary line ab connecting the outer circumferential surface of the disk to the rotation axis of the rotary shaft hole at the contact surface of the seat ring and an imaginary line of the imaginary cone c form an angle of 85 to 95 degrees.
The method according to claim 1,
Both sides of the disk are formed parallel to each other,
Wherein one side of the disk is formed not parallel to the imaginary line b.
The method according to claim 1,
And the center of the disk is disposed on the imaginary line a.
The method of claim 1, wherein
And an outer circumferential surface of the disk is formed to be in surface contact with the seat ring.
The method according to claim 1,
Wherein the seat ring comprises at least one of a metal sheet, a graphite sheet and polytetrafluoroethylene (PTFE).
KR1020140183194A 2014-12-18 2014-12-18 Butterfly valve KR20160074192A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140183194A KR20160074192A (en) 2014-12-18 2014-12-18 Butterfly valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140183194A KR20160074192A (en) 2014-12-18 2014-12-18 Butterfly valve

Publications (1)

Publication Number Publication Date
KR20160074192A true KR20160074192A (en) 2016-06-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020140183194A KR20160074192A (en) 2014-12-18 2014-12-18 Butterfly valve

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200028171A (en) * 2018-09-06 2020-03-16 캄텍주식회사 A valve of a vechicle
KR102268251B1 (en) * 2020-12-10 2021-06-23 한국유니콤밸브주식회사 Butterfly valve with quintuple offset structure

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200028171A (en) * 2018-09-06 2020-03-16 캄텍주식회사 A valve of a vechicle
KR102268251B1 (en) * 2020-12-10 2021-06-23 한국유니콤밸브주식회사 Butterfly valve with quintuple offset structure
WO2022124527A1 (en) * 2020-12-10 2022-06-16 한국유니콤밸브주식회사 Butterfly valve with quintuple offset structure
US12092225B2 (en) 2020-12-10 2024-09-17 Korea Unicom Valve Co., Ltd Butterfly valve with quintuple offset structure

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Free format text: TRIAL NUMBER: 2016101005223; TRIAL DECISION FOR APPEAL AGAINST DECISION TO DECLINE REFUSAL REQUESTED 20160905

Effective date: 20180112