KR20170084932A

KR20170084932A - Hybrid valve for micro flow control

Info

Publication number: KR20170084932A
Application number: KR1020160004373A
Authority: KR
Inventors: 이권희; 변지훈
Original assignee: 동아대학교 산학협력단
Priority date: 2016-01-13
Filing date: 2016-01-13
Publication date: 2017-07-21

Abstract

The present invention relates to a hybrid valve for fine flow control. Comprising: a body having a flow path through which fluid flows; A ball which is installed in the flow field provided by the body so as to be rotatable and has a through hole for passing a fluid through the center thereof and opens and closes the flow passage in accordance with the rotational movement; A stem secured to the ball and extending outwardly of the body; A handle for axially rotating the stem; A rotation shaft installed to be rotatable about an axis of the ball across the through hole and extending to the outside of the body; A disk located inside the through hole of the ball and operating according to the rotation of the shaft of the rotation shaft to open and close the through hole; And an operation handle for operating a rotation shaft from the outside of the body.
In the hybrid valve for controlling minute flow rate according to the present invention, the blocking disk used in the butterfly valve is installed in the inner flow path of the ball constituting the ball valve to realize the advantages of the ball valve and the butterfly valve have.

Description

[0001] The present invention relates to a hybrid valve for micro flow control,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a valve for controlling the flow of a fluid, and more particularly, to a hybrid valve for controlling minute flow rate in which a ball valve and a butterfly valve are combined.

There are many different types of valves installed in the pipeline for moving fluids such as various fluids, chemicals, or water or gas to a desired place. Such a valve functions to regulate the flow rate of fluid passing therethrough or to block the flow if necessary, and is selected as those designed optimally for the purpose of use.

For example, ball valves are excellent in safety and reliability against high temperature and high pressure and have good durability, and are widely used for industrial purposes, for example, in gas pipelines and power plants.

The ball valve includes a body through which the fluid passes, a spherical ball which is installed inside the body and is rotatable in a direction of 90 degrees and in which a flow path is formed, and a base Various kinds of structures having different structural characteristics have been developed according to purposes.

The butterfly valve is a valve that is installed in a pipe for transferring fluids such as various kinds of industrial water and oil and controls the flow of the fluid. The butterfly valve includes a valve body connected to a pipeline constituting a pipeline, And is constituted by a disk which is rotated by the drive shaft to open and close the duct. The drive shaft receives a rotational force from an opening / closing operation part provided outside the valve body, and rotates in an axial direction to open / close the disk.

Such a butterfly valve is fast in operation because it has a simple opening and closing action, and is widely used not only for low pressure but also for control of high pressure water, steam or gas.

On the other hand, the ball valve is excellent in sealing performance because there is little leakage of pressure in the shutoff state, but it has a disadvantage that it is not easy to control the flow rate. In addition, the butterfly valve has the above-mentioned various advantages but has a problem that it can not guarantee the leakage of pressure or fluid in the blocking state.

Thus, although the ball valve and the butterfly valve have complementary characteristics, a so-called hybrid type valve combining the advantages of a ball valve and a butterfly valve has not been proposed.

In the case of Korean Patent Laid-Open No. 10-2009-0118039 (tube end butterfly metering and shut-off valve), it has a configuration including a C-shaped or hemispherical intermediate member and a support plate provided inside the intermediate member, Although attempts have been made to solve the problem of leaks with fly valves, they have not been able to achieve near-perfect leakage protection such as typical ball valves.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a shut-off disk used in a butterfly valve in an inner flow path of a ball constituting a ball valve, The present invention provides a hybrid valve for regulating a flow rate of a fluid.

According to an aspect of the present invention, there is provided a hybrid valve for controlling minute flow rate, comprising: a body having a flow path through which fluid flows; A ball which is installed in the flow field provided by the body so as to be rotatable and has a through hole for passing a fluid through the center thereof and opens and closes the flow passage in accordance with the rotational movement; A stem secured to the ball and extending outwardly of the body; A handle for axially rotating the stem; A rotation shaft installed to be rotatable about an axis of the ball across the through hole and extending to the outside of the body; A disk located inside the through hole of the ball and operating according to the rotation of the shaft of the rotation shaft to open and close the through hole; And an operation handle for operating a rotation shaft from the outside of the body.

In addition, the stem and the rotating shaft are disposed coaxially, and the disc and the ball operate independently of each other.

In the hybrid valve for controlling minute flow rate according to the present invention, the blocking disk used in the butterfly valve is installed in the inner flow path of the ball constituting the ball valve to realize the advantages of the ball valve and the butterfly valve have.

FIG. 1 is a view for explaining a configuration of a hybrid valve for controlling minute flow rate according to an embodiment of the present invention.
FIG. 2 is a view showing the ball and disk assembly in the hybrid valve for fine flow rate control shown in FIG. 1. FIG.

Hereinafter, one embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

The hybrid valve 11 for microfluid flow control according to the present embodiment is basically provided with a flow rate adjusting disk 27 in a ball 23 provided inside the ball valve and combining the advantages of the ball valve and the butterfly valve .

1 is a view for explaining a configuration of a hybrid valve 11 for controlling minute flow rate according to an embodiment of the present invention. 2 is a cross-sectional view of FIG. 1 showing a ball 23 and a disc 27 assembly in the valve 11 shown in FIG.

As shown in the figure, the high-flow valve 11 for controlling the micro-flow rate according to the present embodiment includes a body 13 for passing a fluid into the high-bulb valve 11, and a ball 13 disposed inside the flow path 13a of the body 13, A pair of ball seats 19 for rotatably supporting the ball 23 and a stem groove 23b formed in the upper portion of the ball 23, A handle 21 for axially rotating the stem 17; a disk 27 provided in the through hole 23a of the ball 23; And an operation handle 31 for operating the operation handle.

The body 13 has a predetermined inner diameter, and both ends of the body 13 are connected to an external pipeline to pass the fluid therethrough. The body 13 can be made of stainless steel, alloy steel, or the like.

The ball 23 is a spherical member whose both sides are supported by the ball seat 19 and has a through hole 23a at the center. The through hole 23a is a passage for the fluid having the same inner diameter as the flow passage 13a of the body 13. [ The central shaft of the through hole 23a is opened from the central axis of the body 13 as the handle 21 is rotated to rotate the ball 23 and the handle 21 is rotated by 90 degrees so that the through hole 23a Is orthogonal to the central axis of the body 13 and the valve 11 is blocked.

Reference numeral 15 denotes a cap 15 screwed into the body 13. The cap 15 can be separated from the body 13 and the ball 23 can be removed.

Meanwhile, a rotation shaft 33 is provided in the through hole 23a provided by the ball 23. [ The rotating shaft 33 is a shaft mounted across the through hole 23a in the radial direction and is rotatable about an axis in a state of being supported by the ball 23 in response to a rotational force sheared from the outside.

In particular, the rotary shaft 33 has the same central axis as the stem 17. And is in line with the stem (17).

The disk 27 is designed to have a size such that its outer circumferential surface can contact the inner circumferential surface of the through hole 23a. The disk 27 has the rotary shaft 33 therein. And the rotary shaft 33 is positioned in the radial direction of the disk 27. [

Accordingly, when the rotary shaft 33 is rotated in the direction of arrow a in Fig. 2, the disk 27 rotates and the through hole 23a can be opened. The rotating shaft is rotated in the opposite direction to block the through hole 23a with water.

The opening and closing motion of the disk 27 is the same as that in which the disk opens and closes the flow path in a normal butterfly valve. In addition, the shape of the disk 27 may be variously changed according to circumstances.

The rotary shaft (33) has an operation handle (31) at its extended end in a state of extending to the outside of the body (13). The operation handle 31 has a handle bracket 31a as a handle that the user holds by hand and rotates. The handle bracket 31a serves as a stopper for fixing the operation handle 31 to the set position. The above-described handle bracket 31a and the operation handle 31 function as the operation handle of a general butterfly valve.

Reference numeral 29 denotes a guide tube. The guide tube 29 surrounds the rotation shaft 33 as a hollow pipe extending through the ball 23 and the body 13 and extending to the outside. The rotary shaft 33 extends through the induction tube 29 to the outside.

The hybrid valve 11 for controlling the flow rate according to the present embodiment having the above-described configuration uses a ball valve and a butterfly valve, so that the airtightness is good and the flow rate can be accurately controlled.

That is, the flow rate passing through the through hole 23a can be finely adjusted by simultaneously controlling the rotation angle of the ball 23 and the disk 27. [

For example, if the fluid is not to be passed through, the ball 23 is rotated by 90 degrees so that the center axis of the through hole 23a is perpendicular to the center axis of the body. Particularly, at this time, it is preferable that the disk 27 is positioned at a position where the through hole 23a is blocked.

In this state, in order to allow the fluid to pass through the body 13, the ball 23 is slightly rotated so that the through hole 23a is finely opened to the flow path 13a. At this time, since the disk 27 blocks the through hole 23a, the fluid is blocked by the disk 27 and can not pass through the through hole 23a.

When the disk 27 is rotated using the manipulation handle 31 in this state, the clogged fluid is supplied to the destination through the through hole 23a. It is needless to say that the supply amount can be adjusted by adjusting the opening degree of the disk 27. In order to further increase the supply amount in this state, the ball 23 is further rotated.

As a result, the hybrid valve according to the present embodiment configured as described above can simultaneously control the supply flow rate of the fluid through the ball 23 and the disk 27, thereby finely adjusting the supply flow rate.

The operation of the hybrid flow rate control valve 11 according to the present embodiment is as follows.

In order to pass the once-blocked fluid, the handle 21 is operated to rotate the ball 23 like a normal ball valve. When the through hole 23a starts to appear in the flow field as the ball 23 rotates, the disc 27 is then opened using the manipulation handle 31. [

If the passing flow rate is determined by combining the opening degree of the ball 23 and the disk 27, the disk 27 is fixed at the position using the handle bracket 31a.

In order to cut off the supply of the fluid, the ball 23 and the disk 27 are rotated in opposite directions by using the handle 21 and the manipulating handle 31 to block the flow path 13a.

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, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

11: valve 13: body
13a:
15: Cap 17: Stem
19: ball seat 21: handle
23: ball 23a: through hole
23b: stem groove 27: disk
29: guide tube 31: operation handle
31a: handle bracket 33:

Claims

A body (13) having a flow path (13a) through which fluid flows;
A ball 23 installed to be rotatable in a flow field provided by the body 13 and having a through hole 23a for passing a fluid through the center thereof and opening and closing the flow path 13a according to the rotational motion;
A stem (17) secured to the ball (23) and extending outwardly of the body (13);
A handle 21 for axially rotating the stem 17;
A rotation shaft 33 installed to be rotatable across the through hole 23a of the ball 23 and extending to the outside of the body 13;
A disk 27 located inside the through hole 23a of the ball 23 and operating according to the rotation of the shaft 33 to open and close the through hole 23a;
And an operation handle (31) for operating the rotary shaft (33) from the outside of the body (13).

The method according to claim 1,
Wherein the stem (17) and the rotary shaft (33) are disposed coaxially, and the disc (27) and the ball (23) operate independently of each other.