KR20170064852A - Butterfly valve comprising a anti-cavitation disk - Google Patents

Butterfly valve comprising a anti-cavitation disk Download PDF

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Publication number
KR20170064852A
KR20170064852A KR1020150170833A KR20150170833A KR20170064852A KR 20170064852 A KR20170064852 A KR 20170064852A KR 1020150170833 A KR1020150170833 A KR 1020150170833A KR 20150170833 A KR20150170833 A KR 20150170833A KR 20170064852 A KR20170064852 A KR 20170064852A
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KR
South Korea
Prior art keywords
disk
main
stem
auxiliary
main disk
Prior art date
Application number
KR1020150170833A
Other languages
Korean (ko)
Inventor
박영철
성정현
황영준
변지향
Original Assignee
동아대학교 산학협력단
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Application filed by 동아대학교 산학협력단 filed Critical 동아대학교 산학협력단
Priority to KR1020150170833A priority Critical patent/KR20170064852A/en
Publication of KR20170064852A publication Critical patent/KR20170064852A/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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • 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)
  • Details Of Valves (AREA)

Abstract

The present invention relates to a butterfly valve capable of dispersing a fluid and reducing a flow velocity and suppressing cavitation when a plurality of holes are formed to prevent cavitation, A main disk provided inside the valve body and having a plurality of holes formed therein for opening and closing the channel while linearly moving in a rotation or rotation axis direction about the rotation axis, And a driving unit connected to the main disc through the stem to transmit rotational force from the outside of the valve body.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a butterfly valve having a disk having a cavity prevention function,

The present invention relates to a disk for opening and closing a flow path of a valve, and more particularly, to a disk having a plurality of holes for preventing cavitation, thereby dispersing a fluid when opening the flow path, To a butterfly valve.

Generally, a butterfly valve is formed by rotating a disc-shaped disk to open and close a flow path, and is mainly used for waterworks, sewage, and buildings. When the disc starts to open in a closed state or when it is opened at a relatively small angle to control the flow of the fluid, the flow rate of the disc rapidly increases and the pressure of the back surface of the disc rapidly drops below the saturated vapor pressure. Thereby causing cavitation in which air in the fluid (water) is converted into bubbles.

Such cavitation causes noise and vibration, and causes problems of eroding the disk and the channel. In order to reduce such cavitation, it is necessary to develop a technique for reducing the flow velocity by inducing the flow velocity of the fluid to be interfaced with the disk surface to be dispersed when the disk of the valve is changed to the bottom opening degree.

In Korean Utility Model No. 0256367 (registered on Nov. 22, 2001), an arc-shaped porous pressure reducing plate having a plurality of through holes on the front side of the disk is provided, and a plurality of flow guide plates are fixed to the lower side of the disk And a diaphragm pressure damping plate having a plurality of through holes is attached to the diaphragm to diffuse the fluid through the pressure damping plate and the flow guide plate to lower the flow rate of the fluid, The cavitation preventing device of the butterfly valve is disclosed in which the cavitation preventing device is prevented from falling into the cavitation preventing device.

As described above, conventionally, cavitation is suppressed by changing the inner shape of the valve or the shape of the disk, but the prevention of cavitation by changing the shape is limited.

Registration Practical Utility Model No. 20-0256367 (registered on November 22, 2001)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide a disk having a plurality of holes to disperse a fluid when opening a flow path, A butterfly valve is provided.

The present invention provides a butterfly valve having a disk having a cavity protection function, comprising: a valve body having a front surface and a rear surface opened to be connected to a conduit through which fluid flows; A main disk provided in the main body and having a plurality of holes formed therein for opening and closing the channel while being linearly moved in the rotational direction or the rotational axis direction about the rotation axis, and a driving part connected to the main disk through the stem, And a control unit.

The main disk and the auxiliary disk may further include a disk-shaped auxiliary disk coupled to the center of the main disk. The stem may be coupled to an upper portion or a lower portion of the main disk and the auxiliary disk, And the auxiliary disk rotates together.

The auxiliary disk may further include a plurality of holes formed in the valve body so as to be in close contact with the front surface or the rear surface of the main disk. The hole formed in the auxiliary disk may be formed in the same position as the hole formed in the main disk And the fluid flows inside the valve body when the main disk rotates or linearly moves and the holes of the main disk and the holes of the auxiliary disk coincide with each other.

The main disk and the stem may be connected such that the main disk is linearly moved in a direction in which the stem extends when the driving unit rotates.

In addition, a screw type gear is formed on the outer circumferential surface of the stem, and a rack gear is formed on the main disk, and the stem and the gear of the main disk are engaged with each other.

The main disk is rotatably coupled to the auxiliary disk at its center, and the rotation axes of the main disk and the driving unit are perpendicularly connected to each other.

Also, the main disk and the stem may be engaged with bevel gears.

The auxiliary disk may further include a plurality of holes formed in the main disk, the auxiliary disk being in contact with the front surface or the rear surface of the main disk, the holes being formed in the same position as the holes formed in the main disk, When the main disk is linearly moved by the rotation of the driving unit and the hole of the main disk coincides with the hole of the auxiliary disk, fluid flows inside the valve body. When the driving unit further rotates in the same direction, The disk and the auxiliary disk are rotated together with the driving unit so that the inside of the valve body is fully opened.

The main disk and the stem may be connected such that the main disk is linearly moved in a direction in which the stem extends when the driving unit rotates.

In addition, a screw-shaped gear is formed on the outer circumferential surface of the stem, and a nut-shaped gear is formed on the main disk to be coupled to the gear of the stem.

The main disk is connected to the stem between an upper portion and a lower portion of the auxiliary disk, and the auxiliary disk is connected to the stem by a range of a linear motion of the main disk And the main disk is seated in the guide groove of the auxiliary disk.

According to the present invention, as the fluid introduced into the valve body passes through the hole of the disk, the fluid is dispersed and the flow velocity is slowed, so that cavitation occurring in the valve body can be suppressed.

Further, the main disk and the auxiliary disk, which are in a state of obstructing the passage of the valve body, are configured to be rotated by 90 ° together with the driving unit, so that the pressure loss of the fluid can be minimized by fully opening the passage of the valve body.

1 is a perspective view of a butterfly valve according to an embodiment of the present invention.
2 is a sectional view of the butterfly valve according to the first embodiment of the present invention in a closed state.
3 is a sectional view of the butterfly valve according to the first embodiment of the present invention in an open state.
4 is a sectional view of the butterfly valve according to the second embodiment of the present invention in a closed state.
5 is a sectional view of the butterfly valve according to the second embodiment of the present invention in an open state.
6 is a front view and a cross-sectional view of a butterfly valve according to a third embodiment of the present invention in a closed state.
7 is a front view and a cross-sectional view of a butterfly valve according to a third embodiment of the present invention in an open state.
8 is a front view and a cross-sectional view of a butterfly valve according to a fourth embodiment of the present invention in a closed state.
FIG. 9 is a front view and a cross-sectional view of a state in which the holes of the main disk and the auxiliary disk of the butterfly valve coincide with each other and fluid flows, according to the fourth embodiment of the present invention.
FIG. 10 is a front view and a cross-sectional view of the butterfly valve according to the fourth embodiment of the present invention, in which the main disk and the auxiliary disk are rotated by 90 °.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a butterfly valve 100 having a disk having a cavity protection function according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1, an embodiment of the present invention is a valve for controlling a flow of a fluid connected to a conduit through which a fluid flows, the conduit being connected to a conduit through which fluid flows, A main body 110 provided on the inside of the valve body 101 and having a plurality of holes 112 formed therein for opening and closing the pipeline while linearly moving in a rotational or rotational axis direction about the rotational axis, And a driving unit 130 connected to the main disc 110 via a stem 133 to transmit a rotational force from the outside of the main body 101.

Here, the driving unit 130 may be a handle that rotates by hand, and may be a power transmission device such as a gear or a belt for transmitting the power of the motor and the electric motor to the rotary shaft.

2 and 3 show a butterfly valve 100 having a disk having a cavity protection function according to the first embodiment of the present invention. The main disk 110 of the first embodiment includes a valve body 101, And the opening 108 of the valve body 101 is opened and closed while being rotated inside the valve body 101 by the driving part 130. [

The first embodiment of the present invention further includes a disk-shaped auxiliary disk 120 which is coupled to the center of the main disk 110 at right angles. A stem 133 is coupled to an upper portion or a lower portion of the main disk 110 and the auxiliary disk 120 so that the main disk 110 and the auxiliary disk 120 are rotated together by the rotational force of the driving portion 130. [ .

The auxiliary disk 120 is formed in a disc shape having a diameter corresponding to the inner diameter of the passage 108 of the valve body 101 and is not provided with a hole unlike the main disk 110.

Since the main disk 110 and the auxiliary disk 120 are orthogonally coupled to each other at the center, they have a 'ten' shape when viewed from above or below.

The first embodiment of the present invention thus constituted operates as follows.

As shown in FIG. 2, if the auxiliary disk 120 is blocking the passage 108 of the valve body 101, the flow of the fluid in the valve body 101 is blocked.

3, the main disk 110 and the auxiliary disk 120 are rotated by the rotational force of the driving unit 130 so that the main disk 110 is inserted into the passages 108 of the valve body 101 instead of the auxiliary disk 120 The fluid flows to the hole 112 of the main disk 110. [ At this time, as the fluid introduced into the valve body 101 passes through the hole 112 of the main disk 110, the fluid is dispersed and the flow velocity is slowed to suppress the cavitation occurring in the valve body 101 do.

Next, a butterfly valve 100 having a disk having a cavity prevention function according to a second embodiment of the present invention will be described.

4 and 5 illustrate a second embodiment of the present invention in which an auxiliary disk is provided in the valve body 101 in close contact with the front surface or the rear surface of the main disk 110, (120).

In the second embodiment, the auxiliary disk 120 is fixed to the passage 108 of the valve body 101 in close contact with the front surface of the main disk 110.

The hole 122 formed in the auxiliary disk 120 is formed at the same position as the hole 112 formed in the main disk 110 so that the main disk 110 linearly moves to the hole 112 of the main disk 110 When the positions of the holes 122 of the auxiliary disk 120 are matched, the fluid flows inside the valve body 101.

When the driving unit 130 is rotated, the main disk 110 and the stem 133 are connected to each other in a linear motion in a direction in which the stem 133 extends.

A screw gear 134 is formed on an outer circumferential surface of the stem 133 of the second embodiment and a rack gear 114 is formed on the main disk 110 so that the stem 133 and the main disk 110, The gears 114 and 134 are engaged with each other and connected to each other. The main disk 110 may be replaced by a ball screw gear (not shown) which is fastened to the screw gear 134 of the stem 133 instead of the rack gear 114.

The main disc 110 can be linearly moved upward or downward in the direction in which the stem 133 extends in accordance with the rotation direction of the driving unit 130. [

The second embodiment of the present invention thus configured operates as follows.

4, if the hole 112 of the main disk 110 does not coincide with the hole 122 of the auxiliary disk 120, the flow of the fluid in the passage 108 of the valve body 101 is blocked.

5, when the driving unit 130 rotates, the main disk 110 engaged with the stem 133 is lifted or lowered in the direction in which the stem 133 is formed. When the main disk 110 is lifted or lowered and the hole 112 of the main disk 110 coincides with the hole 122 of the auxiliary disk 120, And the holes 112 and 122 of the main disk 110 and the auxiliary disk 120, respectively.

At this time, the fluid introduced into the valve body 101 passes through the holes 112 and 122 of the main disk 110 and the auxiliary disk 120, and the fluid is dispersed and the flow velocity is slowed, Lt; / RTI > is suppressed.

Next, a butterfly valve 100 having a disk having a cavity prevention function according to a third embodiment of the present invention will be described.

6 and 7 relate to a third embodiment of the present invention. The auxiliary disk 100 is provided inside the valve body 101 in close contact with the front surface or the rear surface of the main disk 110, (120).

The auxiliary disk 120 is attached to the front surface of the main disk 110 and is fixed to the passageway 108 of the valve body 101 in the third embodiment.

The hole 122 formed in the auxiliary disk 120 is formed at the same position as the hole 112 formed in the main disk 110 and the main disk 110 is rotated to move the hole 112 of the main disk 110 When the positions of the holes 122 of the auxiliary disk 120 are matched, the fluid flows inside the valve body 101.

The center of the main disk 110 is rotatable with respect to the auxiliary disk 120 so that the positions of the holes 112 of the main disk 110 and the holes 122 of the auxiliary disk 120 are aligned with the rotation of the main disk 110. [ Lt; / RTI >

The main disk 110 is rotatably coupled to the auxiliary disk 120. The rotation axis of the main disk 110 is perpendicular to the rotation axis of the driving unit 130. The rotation of the main disk 110 And the driving unit 130 are vertically connected to each other.

Bevel gears 116 and 136 are formed on the main disk 110 and the stem 133 for coupling the main disk 110 and the driving unit 130 in which the rotation axis is perpendicular to each other.

Thus, the main disk 110 can be rotated clockwise or counterclockwise on the auxiliary disk 120 according to the rotation direction of the driving unit 130.

The third embodiment of the present invention thus configured operates as follows.

6, if the hole 112 of the main disk 110 does not coincide with the hole 122 of the auxiliary disk 120, the flow of fluid in the passage 108 of the valve body 101 is blocked.

7, when the driving unit 130 rotates, the main disk 110 engaged with the stem 133 is rotated in the corresponding direction on the auxiliary disk 120. [ When the main disk 110 rotates and the hole 112 of the main disk 110 coincides with the hole 122 of the auxiliary disk 120, the flow of the fluid stagnated in the passage 108 of the valve body 101 And the holes 112 and 122 of the main disk 110 and the auxiliary disk 120, respectively.

At this time, the fluid introduced into the valve body 101 passes through the holes 112 and 122 of the main disk 110 and the auxiliary disk 120, and the fluid is dispersed and the flow velocity is slowed, Lt; / RTI > is suppressed.

Next, a butterfly valve 100 having a disk having a cavity prevention function according to a fourth embodiment of the present invention will be described.

8, 9, and 10 relate to a fourth embodiment of the present invention. Referring to FIGS. 8, 9, and 10, the auxiliary disk 100 is connected to the stem 133 while closely contacting the front surface or the rear surface of the main disk 110, And further includes a disc 120.

The auxiliary disk 120 is formed in a disc shape having a diameter corresponding to the inner diameter of the passage 108 of the valve body 101 and is in close contact with the rear surface of the main disk 110 and is connected to the stem 133 .

The hole 122 formed in the auxiliary disk 120 is formed at the same position as the hole 112 formed in the main disk 110. The rotation of the driving unit 130 causes the main disk 110 to linearly move, The fluid flows inside the valve body 101 (see FIG. 9) when the positions of the holes 112 of the auxiliary disk 120 and the holes 122 of the auxiliary disk 120 coincide with each other.

In the fourth embodiment, when the driving unit 130 further rotates in the same direction, the main disk 110 and the auxiliary disk 120 are rotated together with the driving unit 130 to completely open the inside of the valve body 101 (See Fig. 10)

The main disk 110 and the stem 133 are connected to each other in a linear motion in a direction in which the stem 133 extends when the driving unit 130 is rotated. Shaped gear 134 is formed in the main disk 110 and a nut 117 is formed in the main disk 110 to be coupled to the gear 134 of the stem 133. The main disk 110 and the stem 133 Can be engaged.

More specifically, the auxiliary disk 120 is connected to the upper and lower stems 133 idly so as to be supported from the stem 133 and fixed in position in the passage 108 of the valve body 101. The auxiliary disk 120 is not affected by the rotation of the driving unit 130 while the main disk 110 is vertically moved in the extending direction of the stem 133 by the rotation of the driving unit 130. [

In addition, the main disc 110 is connected to the stem 133 between the upper and lower portions of the auxiliary disc 120. For this structure, the stem 133 is formed with a gear 134 in the form of a screw only at an intermediate portion connected to the main disk 110, and gears are not formed at upper and lower portions where the auxiliary disk 120 is idly connected .

The auxiliary disk 120 is formed with guide grooves 128 recessed in a range in which the main disk 110 linearly moves. The main disk 110 is mounted on the stem 133 in a state of being seated in the guide grooves 128, Lt; / RTI >

The main disk 110 is mounted on the guide groove 128 of the auxiliary disk 120 and is connected to the stem 133 at the top and bottom by a nut- 117 are combined. Therefore, the main disk 110 receives the rotation force of the driving unit 130 and transmits the rotation force to the nut gear 117, so that the stem 133 linearly moves in the direction in which the stem 133 extends.

Since the main disk 110 is placed in the guide groove 128 of the auxiliary disk 120 and linearly moved, the range of the linear motion is limited only within the guide groove 128.

The fourth embodiment of the present invention configured as above operates as follows.

The main disk 110 is positioned above the guide grooves 128 of the auxiliary disk 120 so that the holes 112 of the main disk 110 are aligned with the positions of the holes 122 of the auxiliary disk 120 The flow of the fluid in the passage 108 of the valve body 101 is blocked.

9, when the driving unit 130 rotates and the stem 133 rotates in one direction, the main disc 110 engaged with the stem 133 is guided in the guide groove 128 of the auxiliary disc 120, The stem 133 is lowered in the extended direction. When the main disk 110 is lowered and the hole 112 of the main disk 110 is aligned with the hole 122 of the auxiliary disk 120, the fluid stagnant in the passage 108 of the valve body 101 And flows through the holes 112 and 122 of the main disk 110 and the auxiliary disk 120. [

At this time, the fluid introduced into the valve body 101 passes through the holes 112 and 122 of the main disk 110 and the auxiliary disk 120, and the fluid is dispersed and the flow velocity is slowed, Lt; / RTI > is suppressed.

10, when the main disk 110 is lowered to contact the lower portion of the guide groove 128 of the auxiliary disk 120 and further rotated in the direction in which the driving unit 130 rotates, The auxiliary disk 120 and the main disk 110 mounted on the guide grooves 128 are moved in the direction of the axis of the main disk 110, (130).

When the main disk 110 and the auxiliary disk 120 which are in a state of blocking the passage 108 of the valve body 101 rotate together with the driving unit 130 by 90 degrees, the passage 108 of the valve body 101 is completely So that the pressure loss of the fluid is minimized and passed through the valve body 101.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the appended claims. And it is to be understood that such modified embodiments belong to the scope of protection of the present invention defined by the appended claims.

100: Butterfly valve 101: Valve body
108: passage 110: main disk
112: main disk hole 114: rack gear
116: Bevel gear of main disc 117: Nut gear
120: auxiliary disk 122: auxiliary disk hole
128: guide groove 130:
133: stem 134:
136: bevel gear of driving part

Claims (11)

A valve body connected to the conduit through which the fluid flows, the valve body being opened to open the front and rear surfaces;
A main disc provided inside the valve body and having a plurality of holes formed therein for opening and closing the channel while linearly moving in a rotational or rotational axis direction about the rotational axis;
And a driving unit connected to the main disc via a stem to transmit a rotational force from the outside of the valve body. The method according to claim 1,
Further comprising a disk-shaped auxiliary disk coupled to the center of the main disk at right angles,
Wherein the stem is coupled to an upper portion or a lower portion of the main disk and the auxiliary disk, and the main disk and the auxiliary disk are rotated together by the rotational force of the driving portion. The method according to claim 1,
Further comprising an auxiliary disk provided inside the valve body in close contact with a front surface or a rear surface of the main disk and having a plurality of holes,
The hole formed in the auxiliary disk is formed at the same position as the hole formed in the main disk,
Wherein a fluid flows inside the valve body when the main disk is rotated or linearly moved such that the holes of the main disk coincide with the holes of the auxiliary disk. The method of claim 3,
Wherein the main disk and the stem are connected such that the main disk is linearly moved in a direction in which the stem extends when the driving unit rotates. 5. The method of claim 4,
Wherein a screw-shaped gear is formed on an outer circumferential surface of the stem, and a rack gear is formed on the main disk, so that the stem and the gear of the main disk mesh with each other. The method of claim 3,
Wherein the main disk is rotatably coupled to the auxiliary disk at its center,
Wherein the main disk and the driving unit are connected to each other with their rotational axes vertically connected to each other. The method according to claim 6,
Wherein the main disc and the stem are engaged with bevel gears. The method according to claim 1,
Further comprising an auxiliary disk having a plurality of holes formed therein, the auxiliary disk being in contact with the front surface or the rear surface of the main disk and connected to the stem,
The hole formed in the auxiliary disk is formed at the same position as the hole formed in the main disk,
When the main disk is linearly moved by the rotation of the driving unit and the hole of the main disk coincides with the hole of the auxiliary disk, fluid flows inside the valve body. When the driving unit further rotates in the same direction, Wherein the disk and the auxiliary disk are rotated together with the driving unit to fully open the inside of the valve body. 9. The method of claim 8,
Wherein the main disk and the stem are connected such that the main disk is linearly moved in a direction in which the stem extends when the driving unit rotates. 10. The method of claim 9,
Wherein a screw-shaped gear is formed on an outer circumferential surface of the stem, and a nut-shaped gear is formed on the main disk to be engaged with gears of the stem. 11. The method of claim 10,
Wherein the upper and lower portions of the auxiliary disk are idly connected to the stem,
The main disk is connected to the stem between an upper portion and a lower portion of the auxiliary disk,
Wherein the auxiliary disk is formed with guide grooves recessed in a range in which the main disk linearly moves,
Wherein the main disc is seated in a guide groove of the auxiliary disc.
KR1020150170833A 2015-12-02 2015-12-02 Butterfly valve comprising a anti-cavitation disk KR20170064852A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150170833A KR20170064852A (en) 2015-12-02 2015-12-02 Butterfly valve comprising a anti-cavitation disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150170833A KR20170064852A (en) 2015-12-02 2015-12-02 Butterfly valve comprising a anti-cavitation disk

Publications (1)

Publication Number Publication Date
KR20170064852A true KR20170064852A (en) 2017-06-12

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Family Applications (1)

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KR1020150170833A KR20170064852A (en) 2015-12-02 2015-12-02 Butterfly valve comprising a anti-cavitation disk

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102125942B1 (en) * 2020-01-21 2020-06-23 주식회사 현대밸브 Butterfly valve with rectifier for filter basin
CN117386825A (en) * 2023-12-11 2024-01-12 江苏正良船用附件有限公司 Low-noise butterfly valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102125942B1 (en) * 2020-01-21 2020-06-23 주식회사 현대밸브 Butterfly valve with rectifier for filter basin
CN117386825A (en) * 2023-12-11 2024-01-12 江苏正良船用附件有限公司 Low-noise butterfly valve
CN117386825B (en) * 2023-12-11 2024-03-12 江苏正良船用附件有限公司 Low-noise butterfly valve

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