KR20170064878A

KR20170064878A - Dual check valve

Info

Publication number: KR20170064878A
Application number: KR1020150170886A
Authority: KR
Inventors: 박흥식; 이병우; 구경모
Original assignee: 동아대학교 산학협력단
Priority date: 2015-12-02
Filing date: 2015-12-02
Publication date: 2017-06-12

Abstract

With regard to the double check valve, it is possible to smoothly perform the flow control while performing the check function so that the fluid flows only in one direction.
According to the present invention, there is provided an air conditioning system comprising: a housing having an inlet and an outlet and connected to a pipe through which a fluid flows; A disk installed on an inlet side of the chamber of the housing and rotating upward in a forward flow of the fluid to open the flow path and rotate in a downward direction when the fluid flows in the reverse direction to shut off the flow path; And a flow control ball provided in the chamber of the housing so as to be rotatable in the left and right direction on the side of the outlet of the chamber and having a communication hole for allowing the flow of the fluid to control the flow rate according to the rotation angle, And the control channel can be blocked by at least one of the control balls, and the flow rate can be controlled by the flow rate control ball when the disk is opened.

Description

Double Check Valve with Flow Control {DUAL CHECK VALVE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve, and more particularly, to a double check valve capable of smoothly performing flow control while performing a check function so that fluid flows only in one direction.

In general, a swing type check valve is installed in a pipe through which a fluid passes to prevent the reverse flow of the fluid flowing in the pipe and to flow only in one direction, thereby interrupting the flow of the fluid. When the fluid normally flows into the pipe Is opened by the pressure of the fluid, and if the fluid reverses due to a malfunction of the pump or other reasons, it is automatically closed to block the back flow of the fluid.

1 and 2, the conventional swing type check valve 51 includes a valve body 52 having an inlet port 52a and an outlet port 52b, and a valve body 52, which is inserted through the inside of the valve body 52 A valve opening and closing disk 54 which opens and closes the inlet port 52a while rotating around the hinge axis 53 and a torsion spring 54 which is inserted into the outer circumferential surface of the hinge shaft 53 to press the valve opening and closing disk 54 And a coil spring 55.

In the conventional swing type check valve constructed as described above, when the fluid normally flows into the duct, the valve opening / closing disk is automatically opened by the pressure of the fluid, and if the fluid flows backward due to malfunction of the pump or other reasons The valve opening / closing disk swings in the reverse direction to quickly close the inlet port of the valve body, thereby preventing backflow of the fluid and preventing the water shock phenomenon.

However, such a swing type check valve has a problem in that the flow rate can not be adjusted. That is, when the pressure of the fluid flowing in the forward direction within the pipe becomes a certain value or more, the valve opening / closing disk swings to the full direction to open the flow path of the valve body as much as possible. By controlling the opening degree of the valve body, There is a problem that there is no function to control.

On the other hand, a technique relating to a control check valve capable of adjusting the flow rate by improving such a problem has been disclosed in Korean Patent Laid-Open Publication No. 2007-0121904 (Dec. 28, 2007). However, in this technology, the configuration for adjusting the flow rate is complicated, thus causing a new problem that the configuration of the entire valve is enlarged.

Therefore, it has been necessary to develop a technique which makes it simple to control the flow rate of the check valve.

Korean Utility Model Publication No. 0220512 (Feb. 2, 2001)

It is an object of the present invention to provide a double check valve capable of smoothly controlling a flow rate while performing a check function so that the fluid flows only in one direction, .

In order to achieve the above object, a double check valve according to the technical idea of the present invention is a check valve which is provided in a pipe through which a fluid flows and blocks reverse flow of the fluid. The check valve includes an inlet and an outlet, A housing having a chamber formed therein; A disk installed on an inlet side of the chamber of the housing and rotating upward in a forward flow of the fluid to open the flow path and rotate in a downward direction when the fluid flows in the reverse direction to shut off the flow path; And a flow control ball provided in the chamber of the housing so as to be rotatable in the left and right direction on the side of the outlet of the chamber and having a communication hole for allowing the flow of the fluid to control the flow rate according to the rotation angle, And the flow rate can be controlled by the flow rate controlling ball when the disk is in the open state.

Here, a first electromagnet may be installed on the lower end of the disk located on the opposite side from the hinge axis, and a second electromagnet may be installed on the chamber ceiling of the housing to indicate attraction and repulsion corresponding to the first electromagnet. have.

Further, a handle connected to the rotation axis of the flow rate adjusting ball may be provided to manually rotate the flow rate adjusting ball.

The rotation shaft of the flow control ball may be provided with a gear for receiving driving force from the electric motor.

In addition, a pressure damping member is further provided on a bottom surface of the chamber adjacent to the lower end of the disk to prevent vortices from passing through the fluid at the initial stage of opening of the passage by the disk and to filter foreign substances contained in the fluid. The pressure damping member may include a cavity material that forms a plurality of cavities such that the wires are entangled in a wire mesh to allow the fluid to pass therethrough.

The pressure damping member may be inserted in correspondence to the incision portion of the housing so as to be detachably coupled to the housing in such a manner that a part of the bottom wall of the chamber of the housing is cut and then the incision is filled, And a base coupled to the housing, wherein the gap is installed on one side of the base so that the base is located inside the housing when the base is coupled to the housing.

The double check valve according to the present invention can smoothly perform flow control while performing a check function so that the fluid flows only in one direction.

1 and 2 are cross-sectional views for explaining a conventional check valve;
3 is a sectional view for explaining the configuration of the double check valve according to the embodiment of the present invention
FIG. 4 is a cross-sectional view of a double check valve according to an embodiment of the present invention,
FIG. 5 is a cross-sectional view showing a state in which the flow path for the forward flow of fluid in the double check valve according to the embodiment of the present invention is fully opened;
6 is a cross-sectional view showing a state in which the flow rate is adjusted by the ball for controlling the flow rate in the forward flow of the fluid in the double check valve according to the embodiment of the present invention
7 is a cross-sectional view showing a state in which the flow path is closed by the ball for controlling the flow rate in the forward flow of the fluid in the double check valve according to the embodiment of the present invention
8 is a cross-sectional view for explaining the operation of the pressure reducing member in the double check valve according to the embodiment of the present invention
9 is a cross-sectional view for explaining a detachable configuration of the pressure reducing member in the double check valve according to the embodiment of the present invention

The double check valve according to the 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. 3 is a cross-sectional view for explaining a configuration of a double check valve according to an embodiment of the present invention, FIG. 4 is a cross-sectional view showing a state in which a fluid flows in a reverse direction in a double check valve according to an embodiment of the present invention, FIG. 6 is a cross-sectional view illustrating a double check valve according to an embodiment of the present invention. FIG. 6 is a cross-sectional view illustrating a double check valve according to an embodiment of the present invention. FIG. 7 is a cross-sectional view showing a state in which the flow path is closed by the ball for controlling the flow rate in the forward flow of the fluid in the double check valve according to the embodiment of the present invention. FIG.

As shown, the double check valve according to the embodiment of the present invention includes a housing 110, a disk 120, a flow control ball 130, and a pressure damping member 160, The swing type disk 120 that swings itself along the flow direction of the swing arm 120 and a flow control ball 130 that adjusts the flow rate of the swing type disk 120, Flow control can be performed conveniently while performing the check function.

Hereinafter, the double check valve according to the embodiment of the present invention will be described in more detail with respect to each of the above components.

The housing 110 has an inlet 110a and an outlet 110b and is connected to a pipe through which the fluid flows and a chamber which is a space in which the disk 120 and the flow control ball 130 are installed is formed in the housing 110.

The disk 120 is installed on the inlet 110a of the chamber 110 and rotates about the hinge shaft 121 so that when the fluid flows forward from the inlet 110a toward the outlet 110b, As shown in FIG. 5, when the fluid flows upward from the outlet 110b and flows in the reverse direction, the fluid flows downward as shown in FIG. The first electromagnet 141 is installed on the lower end of the disk 120 located on the opposite side from the hinge shaft 121. The chamber ceiling of the housing 110 is provided with an attraction force and a repulsive force The second electromagnet 142 is installed. The first electromagnet 141 and the second electromagnet 142 are installed in the first electromagnet 141 and the second electromagnet 142 in a state in which the disk 120 rotates upward to open the passage, So that the repulsive force between the first electromagnet 141 and the second electromagnet 142 can be achieved when the forward flow of the fluid disappears, There is an advantage that it can be blocked more quickly.

The flow control ball 130 is installed to be rotatable in the left and right direction around a rotation axis 131 vertical to the outlet 110b of the chamber of the housing 110, And a communication hole 130a for allowing the communication hole 130a. 6 and 7, the flow rate can be adjusted according to the angle at which the flow controlling ball 130 rotates in a state where the flow path is opened by the disk 120. [ In the case of FIG. 6, the flow controlling ball 130 is rotated by less than 90 degrees so that a certain amount of flow passes through the flow path. In FIG. 7, the flow controlling ball 130 rotates by 90 degrees to block the flow path.

As described above, the double check valve according to the embodiment of the present invention includes a disk 120 capable of shutting off the flow path, and a flow control ball 130 capable of controlling the flow rate, The flow rate can be controlled by the flow rate control ball 130 when the disk 120 is opened.

At least the handle 132 connected to the rotation axis 131 of the flow control ball 130 may be installed to manually rotate the flow control ball 130. Alternatively, It is also possible to rotate the ball 130 for controlling the flow rate. In order to allow the flow control ball 130 to rotate by driving the electric motor, the gear 151 must be installed on the rotation axis 131 of the flow control ball 130. If the gear 151 is provided on the rotating shaft 131 of the flow control ball 130, the electric motor and the gear 151 may be additionally provided with decelerating assemblies. The ball 130 for controlling the flow rate can be operated manually.

In the embodiment of the present invention, it is preferable that a pressure damping member 160 is further provided to reduce the hydraulic pressure and the flow velocity at the initial stage of opening by the disk 120 to suppress cavitation and vortex generation. The pressure damping member 160 will be described in more detail below.

FIG. 8 is a cross-sectional view for explaining the operation of the pressure reducing member in the double check valve according to the embodiment of the present invention, and FIG. 9 is a perspective view illustrating the detachable configuration of the pressure reducing member in the double check valve according to the embodiment of the present invention Fig.

As shown in the drawing, the pressure damping member 160 is installed on a lower surface of the housing 110, at which the lower end of the disk 120 is located, It suppresses vortex. In addition, it also serves to filter out foreign substances contained in the fluid. The pressure damping member 160 includes a base 161 detachably connected to the housing 110 by a bolt 161a in the form of cutting a part of the wall of the housing 110 and filling the cut- And a cavity material 162 installed on one side of the base 161 to form a plurality of cavities through which the wires are entangled in the form of a wire net so that the fluid can pass through. When the pressure reducing member 160 is installed, the pressure of the fluid flowing between the lower end of the disc 120 and the housing 110 can be reduced at the initial stage of opening of the channel by the rotation of the disc 120, It is possible to filter out foreign matter. In particular, as shown in FIG. 9, since the pressure damping member 160 can be easily attached to and separated from the housing 110, the pressure damping member 160 is separated from the housing 110, There is an advantage that it can be removed.

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: housing 120: disk
130: Flow control balls 141 and 142: Electromagnet
151: gear 160: pressure reducing member

Claims

A check valve provided in a pipe through which a fluid flows to block reverse flow of fluid,
A housing having an inlet and an outlet and connected to a pipe through which the fluid flows and having a chamber therein;
A disk installed on an inlet side of the chamber of the housing and rotating upward in a forward flow of the fluid to open the flow path and rotate in a downward direction when the fluid flows in the reverse direction to shut off the flow path;
And a flow control ball provided in the chamber of the housing so as to be rotatable in the left and right direction on the side of the outlet of the chamber and having a communication hole for allowing the flow of the fluid to control the flow rate according to the rotation angle,
Wherein the flow control valve is capable of shutting off the flow path by at least one of the disk and the flow control ball and controlling the flow rate by the flow control ball when the disk is opened.

The method according to claim 1,
Wherein a first electromagnet is installed on a lower end portion of the disk located on the opposite side from the hinge axis and a second electromagnet is installed on a chamber ceiling of the housing to indicate an attraction force and a repulsive force corresponding to the first electromagnet, .

3. The method of claim 2,
And a handle connected to the rotation axis of the flow control ball is provided to rotate the flow control ball manually.

The method of claim 3,
Wherein a gear is provided on a rotating shaft of the flow control ball so as to receive a driving force from the electric motor.

The method of claim 3,
A pressure damping member is further provided on a bottom surface of the chamber of the housing adjacent to the lower end of the disk to prevent vortices from passing through the fluid at the initial stage of the passage of the disk and to filter foreign substances contained in the fluid,
Wherein the pressure damping member comprises a void material which is entangled with a wire mesh to form a plurality of voids so that the fluid can pass through.

6. The method of claim 5,
The pressure damping member is inserted in correspondence with the incision portion of the housing so as to be detachably coupled to the housing in such a manner that a part of the bottom wall of the chamber of the housing is cut and then the incision is filled, Wherein the gap is provided on one side of the base so as to be located inside the housing in a state where the base is coupled to the housing.