KR101895985B1 - V-type Ball Valve - Google Patents

Abstract

The present invention relates to a V-type ball valve in which cavitation is greatly reduced when a valve is opened or closed by forming a gap at the edge of a disk, and is characterized by including a valve body having a flow passage penetrating in the forward and backward directions, A stem that is rotatably coupled to the upper and lower parts and is bent in a hemispherical shape in one lateral direction, a stem that extends from the outside of the valve body to the passage and is coupled to the upper or lower portion of the disk, And the disk has a plurality of air gaps formed at the left and right edges thereof for cavitation reduction upon opening and closing of the valve.

Description

A V-type ball valve having a gap formed at the edge of the disc.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a V-type ball valve having a gap formed at an edge of a disk, and more particularly, to a V-type ball valve in which cavitation is greatly reduced when a valve is opened or closed by forming a gap at an edge of the disk.

A valve is a mechanical element used in various piping to control the flow rate or pressure of a fluid in a pipe, or to control the flow of a fluid, and various kinds of valves are selected and used according to piping conditions and required functions in the piping.

A ball valve, which is one kind of such a valve, is a ball having a circular through hole as an element for controlling the flow rate, and the ball is a ball which is a flow path of the fluid And is rotated in accordance with the rotation of a stem provided in a direction perpendicular to the through hole.

Here, the stem may include a drive mechanism such as a manual lever, a manual gear, a manual gear with chain wheel, a pneumatic actuator, an electric actuator, And the rotation of the ball is induced according to the operation of the driving mechanism, and the ball provided inside the ball valve is also referred to as a valve ball.

In the conventional ball valve, when the through hole of the valve ball and the flow path of the fluid coincide, the maximum allowable flow amount is fully opened and the flow path of the fluid and the through hole of the valve ball are made 90 When the ball valve is fully closed, the fluid is prevented from flowing.

When it is necessary to adjust the flow rate of the fluid flowing through the ball valve, the valve ball is rotated at a predetermined angle so that the through hole of the ball and the flow path of the fluid have a partial open state at an angle of 90 ㅀ or less.

However, in the conventional ball valve as described above, a large cavitation phenomenon occurs in a state that the valve ball is opened minutely, so that sudden pressure change, vibration, and noise are generated in the valve and the pipeline. There was a problem that was damaged.

Patent Document 10-1275056: Ball Valve and Manufacturing Method Thereof

SUMMARY OF THE INVENTION It is an object of the present invention to provide a V-type ball valve in which cavitation is greatly reduced when a valve is opened and closed by forming a gap at the edge of a disk.

According to an aspect of the present invention, there is provided a V-type ball valve having a gap formed at an edge of a disk, the V-shaped ball valve comprising: a valve body having a flow passage penetrating in the forward and backward directions; A stem which is rotatably coupled to an upper portion and a lower portion of the valve body and which is bent in a hemispherical shape in one lateral direction and a stem which extends from the outside of the valve body to the passage and is coupled to an upper portion or a lower portion of the disk, And a plurality of air gaps are formed on the left and right edges of the disc to reduce cavitation during opening and closing of the valve.

In addition, the disc may be characterized in that both side edges thereof are recessed correspondingly to the formation of the flow path so as not to block the flow path at the open position.

In addition, the gap of the disk may become larger toward the edge of the disk.

Further, the disk may be characterized in that the rotation of the disk is limited to 90 degrees clockwise and 90 degrees counterclockwise on the basis of the closed state.

In addition, the valve body adjacent to the position where the handle and the stem are coupled is slidably coupled to the stem in a direction in which the flow path of the valve body is formed, and the valve body is slidably moved forward and rearward in the flow direction, Wherein the valve body further comprises a pivotally-deformable member having a first projection and a second projection protruding outward from the body, wherein a portion of the valve body, to which the pivotally-deformable member is coupled, Wherein the first and second protrusions are engaged with the opening protrusions and the first protrusions or the second protrusions of the turning direction changing member when the handle is pivoted, And a first stopper and a second stopper protruding inward are formed.

In addition, when the swinging direction variable member is slid to the one end and the other end of the valve body, the position is fixed to the valve body by the magnetism.

According to the V-type ball valve in which the gap is formed at the edge of the disk as described above,

First, the cavity formed at the edge of the disk greatly reduces the cavitation phenomenon caused by the opening and closing of the valve, so that the configuration of the valve and the channel connected to the valve can be prevented from being quickly damaged by the cavitation.

Secondly, as the vibration and the pressure change due to the cavitation shape are relaxed, the flow rate can be stably controlled to a predetermined numerical value even when the valve is finely opened.

Thirdly, since the disc is configured to rotate 90 degrees in both directions based on the closed state, the wear of the disc is dispersed on the both side edges, so that the lifetime of the disc is maximized twice.

1 is a perspective view showing the outline of a V-type ball valve according to an embodiment of the present invention;
FIG. 2 is a sectional view of a V-type ball valve according to an embodiment of the present invention, in which the handle is omitted. FIG.
3 is a perspective view showing a structure of a disk of a V-type ball valve according to an embodiment of the present invention.
4A is a bottom view showing a closed state of a V-type ball valve according to an embodiment of the present invention.
FIG. 4B is a bottom view showing a finely opened state of the V-type ball valve according to the embodiment of the present invention. FIG.
FIG. 5 is a graph showing a simulation result of cavitation generated during opening and closing of a general V-type ball valve and pressure applied inside the valve.
FIG. 6 is a graph showing a simulation result of cavitation generated during opening and closing of a V-type ball valve according to an embodiment of the present invention and the pressure applied to the inside of the valve. FIG.
FIG. 7A is a bottom view showing a state in which a disk and a handle of a V-type ball valve according to an embodiment of the present invention are rotated 90 degrees counterclockwise to open a valve. FIG.
FIG. 7B is a bottom view showing a state in which the disc and the handle of the V-type ball valve according to the embodiment of the present invention are rotated 90 degrees clockwise to open the valve. FIG.
FIGS. 8A and 8B are plan views illustrating the rotation of the handle in a counterclockwise direction in a state in which the swingable member of the V-type ball valve according to the embodiment of the present invention is slid to one side. FIG.
Figs. 9A and 9B are plan views showing the rotation of the handle in the clockwise direction in a state in which the pivotally deformable member of the V-type ball valve according to the embodiment of the present invention is slid to the other side. Fig.

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

A V-type ball valve according to an embodiment of the present invention is a device installed in a piping to control the flow and flow rate of a fluid flowing through a piping.

1 to 3, a V-type ball valve according to an embodiment of the present invention includes a valve body 110 having a flow passage 112 penetrating in the front-rear direction, A disk 120 which is rotatably coupled to the valve body 110 so as to open and close the valve body 112 and that is bent in a hemispherical shape in one lateral direction and a disk 120 which extends from the outside of the valve body 110 to the flow path 112, And a handle 160 coupled to the stem 130 extending outwardly of the valve body 110. The disc 120 is connected to the valve 120 via a valve 130, And a plurality of air gaps 122 are formed on the left and right edges to reduce cavitation upon opening and closing of the air gap 122.

The valve body 110 is mounted on a pipe through which gas or fluid flows, and accommodates therein the structures for controlling the flow and flow of the fluid. The flow path 112 formed through the valve body 110 is preferably formed in a straight line.

The disk 120 is coupled within the valve body 110 to be rotated by rotational movement transmitted to the stem 130. The stem 130 is coupled to the upper or lower portion of the rotating shaft of the disk 120.

The disk 120 is formed in a semi-spherical shape in one direction. This shape can be shaped like '⊃', and it can be classified as a ball valve because it is semi-spherical. The valve according to this embodiment is provided with an inflow path and a discharge path in the flow path 112 of the valve body 110 so as to block the fluid to the concave portion of the disk 120. [

The disc 120 is recessed at both side edges corresponding to the formation of the flow path 112 so as not to block the flow path 112 at the open position. The disk 120 of this embodiment also has a shape corresponding to the flow path 112 so that the ball does not interfere with the flow of the fluid at the time of opening, as the ball disk of a general ball valve has a passage having the same diameter as the flow path 112. [ .

Particularly, the disc 120 is characterized in that a plurality of air gaps 122 are formed at left and right edges to reduce the occurrence of cavitation upon opening and closing of the valve. Cavitation is a phenomenon in which water is evaporated as the static pressure at any part of the oil stream falls below the vapor pressure corresponding to the water temperature, and air bubbles are generated due to the low pressure of the water. This phenomenon is also referred to as cavitation. Cavitation results in noise and vibration, erosion in the surrounding configuration, resulting in shortened valve life. Cavitation occurs most at the moment when the disk 120 is opened finely (see Figs. 4A and 4B), such as when the valve is opened or closed. Fig. 5 is a simulation result of the cavitation generated when the V-type ball valve is opened and closed and the pressure applied to the inside of the valve. As shown in the drawing, it can be seen that a large number of bubbles are generated unevenly behind the disc 120, and the pressure increase in the valves and pipelines located behind the disc 120 is considerably increased.

 The disk 120 of this embodiment is formed with a plurality of perforated voids 122 at its edges wherein the flow of fluid at the moment of opening or closing of the disk 120 is progressively increased or decreased by the air gap 122, The degree of pressure change is relaxed, thereby suppressing the generation of bubbles. Fig. 6 shows the result of simulating the cavitation generated during opening and closing of this embodiment and the pressure applied to the inside of the valve. As shown in the figure, it can be seen that the number of bubbles generated from the rear of the disc 120 is considerably reduced, and thus the pressure applied to the valve and the duct located behind the disc 120 is greatly reduced. As described above, the cavity 122 of the disk 120 reduces the occurrence of cavitation at the moment of opening or closing, thereby extending the life of the overall valve.

The gap 122 of the disk 120 may be gradually increased in size toward the edge of the disk 120 in order to enhance the function of increasing or decreasing the flow of the fluid in a stepwise manner. Since the air gap 122 gradually increases in size toward the edge of the disk 120, the flow of the fluid can be increased or decreased at a more granular level at the opening or closing of the valve, There is an effect that is more strengthened.

Referring to FIGS. 7A and 7B, the disc 120 may be characterized in that its rotation is limited to 90 degrees in the clockwise direction and 90 degrees in the counterclockwise direction based on the closed state. When the disk 120 is opened and closed only in one direction, only one side edge of the disk 120 is worn. However, if the disc 120 is configured to rotate 90 degrees bidirectionally on the basis of the closed state, wear of the disc 120 is dispersed on both edges, so that the lifetime of the disc 120 is doubled .

Referring to FIGS. 8A and 8D and FIGS. 9A and 9B, the rotation of the disk 120 may be performed in the same direction and speed as the rotation of the handle 160. In this embodiment, rotation of the disc 120 in both directions by 90 degrees on the basis of the closed state is implemented by the structural features of the portion where the handle 160, the stem 130, and the valve body 110 are combined .

Specifically, the valve body 110 is formed with a protruded portion surrounding the stem 130 along a direction in which the stem 130 protrudes to prevent fluid from leaking to the extended portion of the stem 130. The handle 160 is also coupled to the stem 130 protruding from the top of the valve body 110. The valve body 110 adjacent to the position where the handle 160 and the stem 130 are coupled is slidably coupled with the stem 130 in a direction in which the flow path 112 of the valve body 110 is formed, And a pivotally deformable member 150 having a first projection 151 and a second projection 152 for limiting the rotation of the handle 160 in the forward and rearward directions. The swiveling direction adjustable member 150 is formed in an elliptical shape with a through-hole sliding hole 154 for vertically extending the stem 130 in the center. When the swiveling direction adjustable member 150 slides in one direction, the first protrusions 151 protrude in the sliding direction of the valve body 110. At this time, the second projection 152 located in the opposite direction is completely inserted into the valve body 110. When the swinging direction changing member 150 is slid in the other direction, the second protrusion 152 protrudes in the sliding direction of the valve body 110 and the first protrusion 151 located in the opposite direction protrudes from the valve body 110 ).

An opening protrusion 142 protruding in a direction orthogonal to the sliding direction of the swinging direction changing member 150 is formed at a portion where the swinging direction changing member 150 of the valve body 110 is coupled.

On the right and left sides of the portion of the handle 160 coupled with the stem 130 are formed a first protrusion 151 of the swinging direction changing member 150 and an opening protrusion 142 of the valve body 110 when the handle 160 is rotated. A first stopper 161 and a second stopper 162 protruding from the second protrusion 152 are formed.

8A and 8B, in order to rotate the handle 160 and the disk 120 in the counterclockwise direction, the pivoting direction changing member 150 is slid in one direction of the valve body 110, 151 protrude from the valve body 110. 8A, when the handle 160 faces the closing direction of the valve, the first stopper 161 of the handle 160 is hooked on the first protrusion 151 so that the handle 160 can be rotated clockwise Is limited. 8B, when the handle 160 is rotated in the counterclockwise direction, the handle 160 is rotated and stopped until the second stopper 162 is hooked on the opening protrusion 142. The rotation angle of the handle 160 is limited to 90 degrees since the opening projection 142 is formed to be orthogonal to the sliding direction of the turning direction changing member 150. [ At this time, the disc 120 also rotates together with the handle 160 so that the valve is opened (see Fig. 7A).

9A and 9B, in order to rotate the handle 160 and the disk 120 in the clockwise direction, the pivoting direction changing member 150 is slid toward the other side of the valve body 110 to form the second projection 152 Is projected on the valve body 110. As shown in Fig. 9A, when the handle 160 faces the closing direction of the valve, the second stopper 162 of the handle 160 is hooked on the second projection 152 and the handle 160 is rotated counterclockwise Is limited. 9B, when the handle 160 is rotated in the clockwise direction, the handle 160 is rotated and stopped until the first stopper 161 is hooked on the opening protrusion 142. The rotation angle of the handle 160 is limited to 90 degrees since the opening projection 142 is formed to be orthogonal to the sliding direction of the turning direction changing member 150. [ At this time, the disc 120 also rotates together with the handle 160 so that the valve is opened (see Fig. 7B).

The structure of the valve body 110, the stem 130 and the handle 160 as described above allows the disc 120 to be rotated 90 degrees clockwise and 90 degrees counterclockwise do.

The swivel direction changeable member 150 may further include a feature that the position is fixed to the valve body 110 by magnetic force when the swivel direction variable member 150 is slid to one end and the other end of the valve body 110. In this embodiment, the first magnet 156 is provided in the middle of the side portion of the turning direction changing member 150, and when the turning direction changing member 150 is slid to one side and the other side in the valve body 110, And a second magnet 116 having a polarity opposite to that of the first magnet 156 is installed on each of the portions facing the first magnet 156. When the swiveling direction variable member 150 is slid to one side and the other side in the valve body 110, the position is fixed by the attractive force of the first magnet 156 and the second magnet 116. The magnetic force of the first magnet 156 and the second magnet 116 is released when the user physically presses the first projection 151 or the second projection 152 protruding from the valve body 110 It is preferable that the swinging direction changing member 150 is slid to a degree.

In another embodiment, the position of the swivel-variable member 150 is magnetically fixed in the valve body 110 as long as the magnet is formed on both sides of the swivel-variable member 150. In another embodiment, it is also possible that only one of the first magnet 156 and the second magnet 116 is made of a magnet, and the other is made of a metal material from which magnet and attracting force are generated.

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: valve body 112:
120: Disk 122: Pore
130: stem 142: opening projection
150: turning direction variable member 151: first projection
152: second projection 154: sliding hole
160: handle 161: first stopper
162: Second stopper

Claims (7)

A valve body having a flow passage penetrating in the front-rear direction;
A disk rotatably coupled to the upper and lower parts of the valve body to open and close the flow path of the valve body, the disk being curved in a hemispherical shape in one lateral direction;
A stem extending from the outside of the valve body to the flow path and coupled with the upper or lower portion of the disk;
And a handle coupled to the stem extending outwardly of the valve body,
The disk is formed with a plurality of air gaps at left and right edges to reduce cavitation upon opening and closing of the valve,
The disc is limited to rotate 90 degrees clockwise and 90 degrees counterclockwise on the basis of the closed state,
Wherein the valve body is slidably coupled to the valve body adjacent to a position where the handle and the stem are coupled with each other in a direction in which the flow path of the valve body is formed about the stem, Further comprising a pivotally deformable member having a first protrusion and a second protrusion protruding from the outside,
Wherein an opening protrusion protruding in a direction orthogonal to the sliding direction of the swivel direction variable member is formed at a portion of the valve body where the swivel direction variable member is engaged,
A first stopper and a second stopper protruding from the opening protrusion and the first protrusion or the second protrusion of the pivoting direction variable member when the handle is pivoted are formed on left and right sides of the portion of the handle coupled with the stem, V-type ball valve. The method according to claim 1,
Wherein the discs are cut at both side edges so as not to block the flow path at the open position, concavely corresponding to the formation of the flow path. The method according to claim 1,
And the air gap of the disc increases in a direction toward an edge of the disc. delete delete The method according to claim 1,
And the position of the V-shaped ball valve is fixed to the valve body by magnetic force when the swinging direction variable member is slid to one end and the other end of the valve body. A valve body having a flow passage penetrating in the front-rear direction;
A disk rotatably coupled to the upper and lower parts of the valve body to open and close the flow path of the valve body, the disk being curved in a hemispherical shape in one lateral direction;
A stem extending from the outside of the valve body to the flow path and coupled with the upper or lower portion of the disk;
And a handle coupled to the stem extending outwardly of the valve body,
The disk is formed with a plurality of air gaps at left and right edges to reduce cavitation upon opening and closing of the valve,
The discs are concavely cut at both side edges so as not to block the flow path at the open position corresponding to the formation of the flow path,
Wherein the gap of the disk increases in size toward the edge of the disk,
The disc is limited to rotate 90 degrees clockwise and 90 degrees counterclockwise on the basis of the closed state,
Wherein the valve body is slidably coupled to the valve body adjacent to a position where the handle and the stem are coupled with each other in a direction in which the flow path of the valve body is formed about the stem, Further comprising a pivotally deformable member having a first protrusion and a second protrusion protruding from the outside,
Wherein an opening protrusion protruding in a direction orthogonal to the sliding direction of the swivel direction variable member is formed at a portion of the valve body where the swivel direction variable member is engaged,
A first stopper and a second stopper protruding from the opening protrusion and the first protrusion or the second protrusion of the turning direction variable member are formed on left and right sides of a portion of the handle coupled with the stem,
And the position of the V-shaped ball valve is fixed to the valve body by magnetic force when the swinging direction variable member is slid to one end and the other end of the valve body.

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