KR20170064859A - Butterfly valve with pressure reducing member for preventing vortex - Google Patents

Butterfly valve with pressure reducing member for preventing vortex Download PDF

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Publication number
KR20170064859A
KR20170064859A KR1020150170848A KR20150170848A KR20170064859A KR 20170064859 A KR20170064859 A KR 20170064859A KR 1020150170848 A KR1020150170848 A KR 1020150170848A KR 20150170848 A KR20150170848 A KR 20150170848A KR 20170064859 A KR20170064859 A KR 20170064859A
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KR
South Korea
Prior art keywords
disk
pressure
main body
semicircular
fluid
Prior art date
Application number
KR1020150170848A
Other languages
Korean (ko)
Inventor
한승호
김태영
이명곤
김양균
임재훈
Original Assignee
동아대학교 산학협력단
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.)
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Application filed by 동아대학교 산학협력단 filed Critical 동아대학교 산학협력단
Priority to KR1020150170848A priority Critical patent/KR20170064859A/en
Publication of KR20170064859A publication Critical patent/KR20170064859A/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
    • F16K1/16—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
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • 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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member

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

Abstract

The present invention relates to a pressure damping member and a butterfly valve having the pressure damping member, and is capable of effectively suppressing a vortex by controlling the flow velocity so as not to change suddenly at the beginning of opening and closing by rotation of the disk.
According to the present invention, there is provided an air conditioner comprising: a main body having a circular tubular shape for forming a flow passage therein; The semicircular one side portion and the semicircular side portion formed at positions symmetrical to each other about the rotation axis are rotated in the direction of retreating and advancing at the opening of the main body, A disk; A first semicircular plate provided on a front surface of one side of the disk and having a plurality of micropores formed in a semicircular shape corresponding to a front surface of the disk and having a through hole through which the fluid can pass; And a first circumferential support portion having a plurality of micropores through which the first semicircular plate portion is spaced apart from the front surface of one side of the disc and spaced apart from the first circumferential support portion, Wherein a fluid flowing between one side of the disk and the main body at the initial stage of the passage opening due to the rotation of the disk is formed in the micropores formed in the first semicircular plate portion of the first pressure- And the formation of vortex is suppressed while passing through the micropores.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a butterfly valve having a vortex prevention pressure reducing member,

The present invention relates to a butterfly valve, and more particularly, to a butterfly valve having a vortex prevention pressure damping member capable of effectively suppressing a vortex by controlling a flow velocity at an early stage of opening and closing due to rotation of a disk.

Generally, a butterfly valve is a valve that controls the opening and closing of a fluid by using a disk of a disk rotating in a cylinder, which is a cylindrical fluid passage, and is relatively simple in structure compared to other types of valves. .

Such butterfly valves are classified into a concentric type, a single offset type, a double offset type, and a triple offset type.

As shown in Fig. 1A, the concentric butterfly valve is configured such that the sealing surface of the valve and the center of the body 10, the disc 20, and the shaft 30 are positioned in the same line, Symmetrical about the axis and symmetrical up and down about the central axis of the body 10. The concentric butterfly valve is most widely used for low temperature and low pressure applications among the butterfly valves and has an advantage of high exponential rate at low pressure. However, when the disk 20 presses the rubber sheet 11 for exponent, The damage rate of the rubber sheet 11 is high and friction between the disc 20 and the rubber sheet 11 is severe and the index ratio is drastically lowered during frequent operation.

The single offset butterfly valve is configured such that the center of the valve body 10 and the shaft 30 are located on the same line as shown in Fig. 1B, but the sealing surface of the disk 20 is "a" As a structure eccentric to one side, it is possible to manufacture and use a large-sized valve as compared with a con- centric valve, to have a lower operating torque than a con- centric valve, to reduce the damage rate of the seat 40 as compared with a con- However, since the disc 20 and the seat 40 are frictionally operated when the valve is opened or closed, there is a limitation in achieving a low torque.

The double offset butterfly valve is configured such that the sealing surface of the disc 20 is eccentric to the center of the valve by "a" as in the case of the single offset butterfly in FIG. 1C, Of the shaft 30 with respect to the outer diameter of the shaft 30 is shifted in one direction by "b ", so that the operation torque is remarkably smaller than that of the concentric butterfly valve and maintenance is easy. On the other hand, There is a restriction that the sealing contact surface is reduced as compared with the single offset type, which causes the seat 40 to vibrate. Therefore, there is a restriction that a material of Teflon type or a material of high elasticity should be used when the seat material is selected. .

In addition to the double offset butterfly valve structure, the triple offset butterfly valve is constructed such that the sealing surface has an elliptical cross section by giving an angle of "a" of one sealing surface with respect to the axis of the shaft 30 as shown in FIG. 1D , A low operating torque can be realized as compared to a concentric valve and a double offset butterfly valve and the valve life is extended due to a drastic reduction of the sealing contact surface and the sealing surface of the seat (40) On the other hand, it is difficult to process the disk 20 having an elliptical shape, which is disadvantageous in that it is very expensive.

The various types of butterfly valves described above have a common advantage in that they have a simple structure in which the flow path is opened and closed by rotation of the disk. However, due to a sudden change in the flow rate during opening and closing using the disk, the pressure of the fluid is lowered below the vapor pressure, Steam bubbles were generated inside the fluid, and there was a persistent vortex problem causing corrosion, wear and noise.

Particularly, in the early stage of opening, the fluid is rapidly concentrated in the narrow flow path formed between the disk and the pipe, and vortex is generated, causing corrosion, wear and noise.

Korean Patent Laid-Open Publication No. 2013-0123615 (November 13, 2013)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the related art as described above, and an object of the present invention is to provide a vortex prevention pressure And to provide a butterfly valve having a damping member.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a butterfly valve having a pressure reducing member for preventing vortex flow, comprising: a main body having a circular tube shape; The semicircular one side portion and the semicircular side portion formed at positions symmetrical to each other about the rotation axis are rotated in the direction of retreating and advancing at the opening of the main body, A disk; A first semicircular plate provided on a front surface of one side of the disk and having a plurality of micropores formed in a semicircular shape corresponding to a front surface of the disk and having a through hole through which the fluid can pass; And a first circumferential support portion having a plurality of micropores through which the first semicircular plate portion is spaced apart from the front surface of one side of the disc and spaced apart from the first circumferential support portion, Wherein a fluid flowing between one side of the disk and the main body at the initial stage of the passage opening due to the rotation of the disk is formed in the micropores formed in the first semicircular plate portion of the first pressure- And the formation of the vortex is suppressed while passing through the micropores.

Here, a second semicircular plate portion is provided on the entire surface of the other side of the disk, and has a plurality of micropores formed in a semicircular shape corresponding to the rear surface of the disk surface, And a second circumferential support portion having a plurality of micropores which are perpendicularly formed along a circumferential portion formed by a straight line of the circumferential portion to support the second semicircular plate portion spaced apart from the rear surface of the other side portion of the disk and through which the fluid can pass And a second pressure reducing member.

Further, a plurality of fluids separated from each other are flowed in a divided form between the first semicircular plate portion of the first pressure-reducing member and the front surface of one side of the disk, A first partition wall for guiding the vortex to prevent vortex flow; A plurality of second partition walls are provided between the second semicircular plate portion of the second pressure reducing member and the rear surface of the other side portion of the disk so as to flow the fluid in a divided form so as to prevent vortices .

Further, the disk has a "?" Shaped cross-section.

In addition, the main body is provided on the rear side of the disk near the one side end of the disk provided with the first pressure damping member so that the fluid passing through the first pressure damping member is flown at the beginning of the flow path, The third pressure-reducing member may further include a void material that forms a plurality of voids through which the wire can penetrate through the wire mesh. .

The third pressure-reducing member may include a base detachably connected to the main body by bolts in a manner to cut a part of the wall of the main body and fill the cut-away portion; And the air gap material provided on one side of the base.

The butterfly valve provided with the vortex prevention pressure damping member according to the present invention can control vortex flow effectively by controlling the flow velocity so as not to change suddenly at the beginning of opening and closing due to rotation of the disk.

In addition, The first pressure-reducing member, the second pressure-attenuating member, and the third pressure-attenuating member, the eddy current suppressing effect can be effectively achieved.

FIGS. 1A to 1D are views for explaining a butterfly valve according to the prior art;
2 is a sectional view for explaining a configuration of a butterfly valve according to an embodiment of the present invention;
3 is a perspective view for explaining the main constitution of the disk, the first pressure damping member and the second pressure damping member in the butterfly valve according to the embodiment of the present invention;
4 is a plan view of the disk, the first pressure damping member and the second pressure damping member in the butterfly valve according to the embodiment of the present invention.
5 is a side view of the disk, the first pressure reducing member and the second pressure reducing member in the butterfly valve according to the embodiment of the present invention
6 is a perspective view for explaining a configuration of a first pressure damping member in a butterfly valve according to an embodiment of the present invention;
7 is a perspective view for explaining the configuration of the second pressure damping member in the butterfly valve according to the embodiment of the present invention.
8 is a cross-sectional view for explaining the configuration of the third pressure damping member in the butterfly valve according to the embodiment of the present invention

A butterfly valve having a pressure reducing member for preventing vortex according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention, and are actually shown in a smaller scale than the actual dimensions in order to understand the schematic structure.

Also, the terms first and second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. On the other hand, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

FIG. 2 is a cross-sectional view for explaining a configuration of a butterfly valve according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of a butterfly valve according to an embodiment of the present invention, 4 is a plan view of a disk, a first pressure damping member and a second pressure damping member in a butterfly valve according to an embodiment of the present invention, and Fig. 5 is a perspective view of a butterfly valve according to an embodiment of the present invention And a side view of the disk and the first pressure-reducing member and the second pressure-reducing member in the butterfly valve.

The butterfly valve according to the embodiment of the present invention includes a main body 110, a disk 120, a first pressure reducing member 130, a second pressure reducing member 140, a third pressure And a damping member (150).

According to such a configuration, by the action of the first pressure damping member 130 and the second pressure damping member 140 installed on the disk 120 and the third pressure damping member 150 installed on the main body 110, It is possible to control so that the flow velocity does not change abruptly in the area A and the area B where the flow of the fluid is concentrated at the beginning of the opening and closing by the rotation of the rotor 120, thereby effectively suppressing the problems caused by the vortex.

Hereinafter, the butterfly valve according to the embodiment of the present invention will be described in more detail with reference to the respective components.

The main body 110 is formed in a circular tube shape so as to be installed by connecting a pipe and a pipe. Here, the main body 110 is not provided with a flange for piping connection, but a flange may be provided.

The disk 120 is rotatable about a rotation axis 120a in the main body 110 to control opening and closing of the passage. In the case of such a disk 120, a semicircular one-side portion and a semicircular-shaped other side portion are tightened at symmetrical positions with respect to the rotation axis 120a, and the one side portion and the other side portion are rotated . As shown in the figure, the disk 120 is formed of a thin plate having a gradually decreasing thickness centered on the rotation axis 120a. Shaped cross-section. If the disk 120 is "??" The inclined angle between the front surface and the rear surface of the disc 120 can be made more gentle with respect to the flow direction of the fluid at the initial stage of the opening of the flow path. Therefore, when the fluid is supplied to the first pressure reducing member 130 and the second pressure reducing member 130, It is advantageous in terms of suppressing the vortex before passing through the first passage 140.

The first pressure damping member 130 is installed on the front surface of one side of the disc 120 to reduce the pressure of the flowing fluid to thereby suppress vortex. 6, the first pressure-reducing member 130 includes a first half-circle plate 131, a first perimeter support 132, and a first partition wall 133. The first half-circle plate 131 is formed on the front surface of one side of the disk 120 and is formed in a semicircular shape corresponding to the entire surface of one side of the disk 120, and has a plurality of micropores 131a ). The first circumferential support part 132 is formed to be perpendicular to the circumferential part of the circumference of the first semicircular part 131, 131) and a plurality of micropores (132a) through which fluid can pass. The first partitioning rib 133 is formed by dividing the fluid between the first half-circle plate 131 of the first pressure-reducing member 130 and the front surface of one side of the disk 120, A plurality of which are spaced apart from each other.

According to the configuration of the first pressure reducing member 130, the flowing fluid passes through the micropores 131a formed in the first semicircular plate 131 and the micropores 132a formed in the first perimeter support 132 The pressure is reduced and guided along the plurality of first partitioning ribs 133 to suppress the vortex generation tendency.

The second pressure damping member 140 is installed on the rear surface of the other side of the disk 120 to reduce the pressure of the fluid flowing thereby to suppress vortex. For this, the second pressure-reducing member 140 includes a second semi-circular plate 141, a second peripheral support 142, and a second partition 143 as shown in FIG. Here, the second half-circle plate 141 is provided on the entire surface of the other side of the disk 120, and is formed in a semicircular shape corresponding to the rear surface of the other side of the disk 120, 141a. The second circumferential support portion 142 is formed perpendicularly to the circumferential portion of the circumferential portion of the second semicircular plate portion 141 so as to be straight, And a plurality of micropores 142a that support the micropores 141 in a spaced apart relation and through which the fluid can pass. The second partitioning rib 143 may be formed by dividing the fluid between the second semi-circle plate 141 of the second pressure reducing member 140 and the rear surface of the other side of the disk 120, A plurality of which are spaced apart from each other.

According to the configuration of the second pressure damping member 140, the flowing fluid is first guided along the plurality of first partitioning ribs 133 in a state of passing through the gap between the disk 120 and the main body 110, The pressure is reduced while passing through the micropores formed in the second semicircular plate 141 and the micropores formed in the second perimeter support 142, thereby suppressing the tendency of vortex generation.

 The third pressure damping member 150 is installed on the rear side of one side end of the disk 120 in which the first pressure damping member 130 of the main body 110 is installed, The fluid passing through the member 130 is passed once again and the vortex is restrained again. In addition, it also serves to filter out foreign substances contained in the fluid. To this end, the third pressure-reducing member 150 is detachably coupled to the main body 110 by a bolt 151a in such a manner that a part of the wall of the main body 110 is cut and then the cut portion is filled A base 151 and a cavity 152 formed on one side of the base 151 to form a plurality of cavities through which the wires can penetrate through a wire mesh. When the third pressure damping member 150 is installed, a fluid flowing between the one side of the disc 120 and the main body 110 at the initial stage of opening of the channel due to the rotation of the disc 120, 130, the pressure of the fluid can be reduced once again while the pressure is lowered, and at the same time the foreign matter contained in the fluid can be filtered out. 8, since the third pressure-reducing member 150 can be easily attached to and detached from the main body 110, the third pressure-reducing member 150 can be separated from the main body 110 It is possible to easily remove foreign matter that is separated and separated.

The third pressure damping member 150 may be installed on the rear side of the other side end of the disk 120 on which the second pressure damping member 140 of the main body 110 is installed. When the third pressure damping member 150 is installed on the rear side of the other side of the disk 120 on which the second pressure damping member 140 of the main body 110 is installed, The pressure of the fluid can be reduced once again in the state where the pressure is lowered via the second pressure damping member 140 at the beginning of the flow path by the first pressure reducing member 140 and at the same time the foreign substances contained in the fluid can be filtered.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be suitably modified and applied in the same manner. Therefore, the above description does not limit the scope of the present invention, which is defined by the limitations of the following claims.

110: main body 120: disk
130: first pressure reducing member 140: second pressure reducing member
150: third pressure damping member

Claims (7)

In butterfly valves,
A main body having a circular tubular shape for forming a flow path therein;
The semicircular one side portion and the semicircular side portion formed at positions symmetrical to each other about the rotation axis are rotated in the direction of retreating and advancing at the opening of the main body, A disk;
A first semicircular plate provided on a front surface of one side of the disk and having a plurality of micropores formed in a semicircular shape corresponding to a front surface of the disk and having a through hole through which the fluid can pass; And a first circumferential support portion having a plurality of micropores through which the first semicircular plate portion is spaced apart from the front surface of one side of the disc and spaced apart from the first circumferential support portion, Including a pressure damping member,
The fluid flowing between the one side of the disk and the main body at the initial stage of the passage opening due to the rotation of the disk passes through the micropores formed in the first semicircular plate portion of the first pressure reducing member and the micropores formed in the first perimeter support portion, Wherein the valve is closed to prevent formation of the butterfly valve. The method according to claim 1,
A second semicircular plate portion provided on a front surface of the other side of the disk and having a plurality of micropores formed in a semicircular shape corresponding to a rear surface of the disk other side portion and through which a fluid can pass, And a second circumferential support portion having a plurality of micropores through which the fluid can pass, the second circumferential support portion being orthogonally formed along the circumferential region formed by the middle straight line and supporting the second semicircular plate portion spaced apart from the rear surface of the other side portion of the disk, Further comprising a force damping member. 3. The method of claim 2,
A plurality of fluids separated from each other so as to prevent vortexes from flowing in a divided form between the first semicircular plate portion of the first pressure reducing member and the front surface of one side of the disk, A first partition wall for preventing vortex flow;
A plurality of second partition walls are provided between the second semicircular plate portion of the second pressure reducing member and the rear surface of the other side portion of the disk so as to flow the fluid in a divided form so as to prevent vortices Butterfly valve. 4. The method according to any one of claims 1 to 3,
The disk has a "?" Wherein the valve is formed in a cross-sectional shape. 5. The method of claim 4,
The fluid flowing through the first pressure reducing member at the initial stage of opening of the flow passage is flown while the vortex is suppressed and the foreign matter contained in the fluid is supplied to the first pressure reducing member, Further comprising a third pressure damping member for filtering,
Wherein the third pressure damping member comprises a void material that is entangled with a wire network to form a plurality of voids so that the fluid can pass through. 6. The method of claim 5,
Wherein the third pressure-reducing member is installed at a rear side of the main body near the other end of the disk on which the second pressure-reducing member is installed. The method according to claim 5 or 6,
The third pressure-reducing member is inserted in correspondence to a cut-away portion of the main body so as to be detachably coupled to the main body in such a manner that a part of the wall of the main body is cut and then the cut- And a base coupled to the main body, wherein the gap material is installed on one side of the base so that the base is located inside the main body in a state where the base is coupled to the main body.
KR1020150170848A 2015-12-02 2015-12-02 Butterfly valve with pressure reducing member for preventing vortex KR20170064859A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102240464B1 (en) * 2020-04-02 2021-04-13 김상일 Swing gate type Adjustable Orifice Valve unit of pulverized coal supply control system of thermal power plant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102240464B1 (en) * 2020-04-02 2021-04-13 김상일 Swing gate type Adjustable Orifice Valve unit of pulverized coal supply control system of thermal power plant

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