KR101852038B1 - Shock absorbing device of swing check valve - Google Patents

Abstract

A swing check valve provided with an impact damping device according to the present invention includes a body (10) having a fluid inlet and a fluid outlet formed on both sides thereof, and a flow path connecting the fluid inlet and the fluid outlet is formed therein; The hinge 100 extends from the hinge 100 and is not connected to the hinge 100. The hinge 100 is in contact with one side of the hinge 100 when the hinge 100 is rotated about the axis, A disc 200 which is connected to the arm 110 to control the fluid to be transferred and rotates about the hinge 100 by fluid pressure; One side of the disc 200 shields the fluid inlet 300 and the hinge 100 is applied with a spring hinge so that a sudden opening and closing of the disc 200 due to a high fluid pressure And provides an effect of improving the durability of the disk and reducing noise and vibration by attenuating the impact of the disk when the disk is suddenly opened or closed due to high pressure.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a swing check valve having an impact damper,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve mounted in a cryogenic gas piping system such as an LNG storage facility or a transfer pipe, and is equipped with an impact damping device for preventing damage due to rapid opening and closing of a valve due to high pressure, Swing check valve.

The check valve is a kind of opening / closing device for controlling the flow of the fluid only in one direction and not flowing in the opposite direction.

There are various types of check valves. Depending on the application, there is a difference between the regulated pressure and the material used. The manual check valve maintains a constant flow rate and remains open when there is no back pressure.

The feature of the check valve is that when the fluid acts at a positive pressure, the disk is kept open and the fluid is continuously flowing and closed when the back pressure is applied.

For example, if the set back pressure of the check valve is 30 bar and the back pressure is greater than 30 bar, the valve should be closed. However, the conventional check valve does not close quickly at a back pressure of 30 bar even when the set back pressure is 30 bar, and even if it is 35 bar, it keeps the open state without being closed.

If the valve fails to close quickly even if the set back pressure is exceeded, the operation fluid leaks undesirably and the valve disc is momentarily closed due to excessive pressure, which causes noise or vibration and adversely affects the valve device there is a problem.

Such a check valve operation delay may cause a serious danger to the safety of the apparatus, particularly in the case of a facility for transferring a cryogenic fluid such as an LNG piping facility.

Accordingly, in the 'Registration Practical Utility Model No. 20-0435109', a rubber seat coupling structure of a dual plate check valve in which a half-moon-shaped disk and a rubber sheet in contact with a half-moon-shaped disk are combined, And a rubber sheet joining structure of a dual plate check valve is disclosed in which a narrowed trapezoidal groove is formed and a rubber sheet is press-molded in a trapezoidal groove. In the 'Registration Practical Utility Model No. 20-0443398' The backflow prevention device is provided adjacent to the water inlet side or the water intake side for the purpose of preventing the backflow of the water meter. The backflow prevention device is characterized in that the backflow prevention device has a hollow hollow structure having an inlet and an outlet through which the fluid can pass, Straight Socket; A fastener provided at an outer edge of the socket inlet side and having a thread in the inner shell; A first check valve disposed at an inlet of the socket to block the flow of fluid backwashing from the outlet to the inlet side; A snap ring disposed in series with the first check valve and press-fitted into the inner diameter of the socket central portion; And a second check valve which is arranged in series with the snap ring, one opening end of which is supported by the snap ring and the other end is supported by an inner diameter step of the outlet side of the socket, and the first and second check valves A valve seat having a centrally open flow path; A poppet holder having an outer diameter such that the valve seat is tightly connected to one opening end of the valve seat and can be fitted and fixed to the socket; A poppet which is slidably installed in the poppet holder and is in close contact with or in contact with the valve seat in accordance with the flow of the fluid or opens or closes the flow passage; And a coil spring interposed between the poppet and the poppet holder to apply elasticity to the poppet in a direction to close the opening end of the poppet holder, wherein the poppet holder has a predetermined distance And the poppet has a poppet shaft having an elongated length so as to be able to move with respect to the longitudinal direction of the shaft so as to be integral with the rear of the poppet shaft, And the flow path formed in the front valve seat of the poppet holder is opened or closed while sliding in the left and right sides in the poppet holder. In addition, the same technology as the swing check valve type linear backflow prevention device is disclosed, It is possible to install and operate precisely even at fine set pressure, Although it is disclosed technology relates to a check valve to operate, there is a durability problem due to a high pressure by a sudden opening and closing of the disc.

KR 1993-0010417 A

KR 20-0435109 Y1

KR 20-0443398 Y1

It is an object of the present invention to solve the above-described problems of the prior art, and more specifically, to provide a disc drive which is excellent in operability even in a very low temperature environment and which improves the durability of the disc by attenuating impact of the disc when the disc is suddenly opened / Swing check valve.

In order to achieve the above object, a swing check valve provided with an impact damping device according to the present invention includes a body 10 having fluid inlets and fluid outlets formed on both sides thereof, and a flow path connecting the fluid inlets and the fluid outlets are formed therein; The hinge 100 extends from the hinge 100 and is not connected to the hinge 100. The hinge 100 is in contact with one side of the hinge 100 when the hinge 100 is rotated about the axis, A disc 200 which is connected to the arm 110 to control the fluid to be transferred and rotates about the hinge 100 by fluid pressure; One side of the disc 200 shields the fluid inlet 300 and the hinge 100 is applied with a spring hinge so that a sudden opening and closing of the disc 200 due to a high fluid pressure .

As described above, the present invention has an excellent operability even in a very low temperature environment, and has an effect of reducing noise and vibration by damping impact of the disk when the disk is suddenly opened and closed due to high pressure, and also improving durability of the disk.

1 is a cross-sectional view illustrating an operation state of a swing check valve provided with an impact damping device according to an embodiment of the present invention;
2 is a block diagram of a swing check valve provided with an impact damping device according to another embodiment of the present invention;
3 is a conceptual diagram illustrating control of a swing check valve provided with an impact damping device according to another embodiment of the present invention;
4 is a flowchart illustrating an operation of a dual check valve provided with an impact damping device according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited by the scope of the present invention.

The check valve is a kind of opening / closing device for controlling the flow of the fluid only in one direction and not flowing in the opposite direction.

There are various types of check valves. Depending on the application, there is a difference between the regulated pressure and the material used. The manual check valve maintains a constant flow rate and remains open when there is no back pressure.

The feature of the check valve is that when the fluid acts at a positive pressure, the disk is kept open and the fluid is continuously flowing and closed when the back pressure is applied.

However, in the case of the conventional check valve, the valve disc is momentarily closed due to an excessively large pressure, causing noises or vibrations, which adversely affects the valve device.

Referring to FIG. 1, a first embodiment of a swing check valve provided with an impact damping device according to the present invention includes a fluid inlet and a fluid outlet formed on both sides thereof, and a flow path connecting the fluid inlet and the fluid outlet is formed (10); The hinge 100 extends from the hinge 100 and is not connected to the hinge 100. The hinge 100 is in contact with one side of the hinge 100 when the hinge 100 is rotated about the axis, A disc 200 which is connected to the arm 110 to control the fluid to be transferred and rotates about the hinge 100 by fluid pressure; One side of the disc 200 shields the fluid inlet 300 and the hinge 100 is applied with a spring hinge so that a sudden opening and closing of the disc 200 due to a high fluid pressure .

Specifically, the spring hinge applied to the hinge 100 can adjust the force and the restoring force depending on the type of the fluid flowing through the valve 1 or the fluid pressure. Also, it is possible to freely modify the present invention within a range that can be deduced from the first embodiment.

In the second embodiment of the present invention, magnets of the same polarity are formed on one side of the inside of the body which abuts against the stop 111 and the stop, so that when the disc 200 is opened suddenly, It is possible to prevent the impact between the inner surface of the body 200 and the inner surface of the body 200 and the fluid inlet 300 contacting the disk 200 and the disk 200 to form magnets of the same polarity, It is possible to prevent the impact between the disc 200 and the fluid inlet 300 by the repulsive force between the magnets when it is abruptly closed due to the reaction and also to be freely modified within a range that can be analogized in the second embodiment.

In the third embodiment of the present invention, a spring is formed on one side of the inside of the body which abuts against the stop 111 or the stop 111. When the disc 200 is opened rapidly, the stop 111 and the inside And when the disc 200 is suddenly closed by suddenly opening the disc 200 by forming a spring on the fluid inlet 300 contacting the disc 200 or the disc 200, It is possible to attenuate the impact between the fluid inlet 300 and the fluid inlet 300 and to perform the modification freely within a range that can be analogized in the third embodiment.

As a fourth embodiment of the present invention, as shown in FIG. 2, the hinge 100 includes a driving unit, a sensor (not shown) for measuring the pressure and a flow rate at the front end and the rear end of a flow path extending on both sides of the valve body 10, And a controller (C) to which the disk (S) is mounted and controls the driving unit in response to pressure and flow rate information from the sensor (S) to open and close the disk (200).

3, the control unit C is connected to the main control unit C ', and the main control unit C' is also connected to a plurality of other valve control units C, And the main control unit C 'is connected to the smart device S so that the opening and closing state of the valve 1 can be checked and the opening and closing of the valve 1 can be controlled through the smart device S.

Through the integrated control, the user can check the presence or absence of the operation of the valve 1 through the smart device S anywhere, and it is easy to detect the failure.

Specifically, the controller C may be connected to the driving unit and the sensor S in a wired manner, but a Bluetooth system or a short-range network system is preferable, and a long-distance network system may be used in some cases.

The above connection method can be applied to a connection method between all devices used in the present invention.

The fourth embodiment will be described in detail below with reference to FIG.

The sensor S of the distal end part measures the fluid pressure and sends it to the control part C while the control part C measures the pressure of the fluid of the back end sensor S It is possible to prevent the pressure difference from becoming larger by controlling the driving unit coupled to the hinge 100 to open the disc 200. When the pressure difference between the front end and the rear end is normal In the case of a pressure difference range, the disk 200 is naturally opened by the fluid. When the flow of the fluid gradually decreases, the flow rate is measured by the sensor S at the front end and the rear end, respectively, and sent to the control unit C. In the control unit C, when the flow rate at the rear end is larger than the flow rate at the front end, It is preferable that the driving unit is controlled so that the disc 200 is closed so that the opening state is maintained or naturally closed when the flow rate at the front end is larger than the flow rate at the rear end.

In addition, it is possible to freely modify the present invention within a range that can be deduced from the fourth embodiment.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

1: Valve
10: Valve body
100: Hinge
110: Cancer
111:
200: disk
300: fluid inlet

Claims (8)

A body having a fluid inlet and a fluid outlet formed on both sides thereof and a flow path connecting the fluid inlet and the fluid outlet are formed therein;
The hinge 100 extends from the hinge 100 and is not connected to the hinge 100. The hinge 100 is in contact with one side of the hinge 100 when the hinge 100 is rotated about the axis, A disc 200 which is connected to the arm 110 to control the fluid to be transferred and rotates about the hinge 100 by fluid pressure; Lt; / RTI >
The hinge 100 is mounted with a driving unit and a sensor S for measuring pressure and flow rate is mounted on the front and rear ends of the flow path extending on both sides of the body 10, Further comprising a control unit (C) for receiving information and controlling the driving unit to open and close the disc (200)
In the absence of fluid flow, one side of the disc 200 shields the fluid inlet 300,
The hinge 100 is provided with a spring hinge to prevent sudden opening and closing of the disc 200 according to fluid pressure,
The sensor S of the distal end part measures the fluid pressure and sends it to the control part C while the control part C measures the pressure of the fluid of the back end sensor S It is possible to prevent the pressure difference from becoming larger by controlling the driving unit coupled to the hinge 100 to open the disc 200. When the pressure difference between the front end and the rear end is normal When the flow of the fluid gradually decreases, the flow rate is measured by the sensor S at the front end and the rear end, respectively, and the flow rate is measured and sent to the control unit C. The control unit C ) Controls the driving unit so that the disc 200 is closed to prevent the backflow of the fluid when the flow rate at the rear end is larger than the flow rate at the front end. When the flow rate at the front end is larger than the flow rate at the rear end, The swing check valve with or impact attenuating device that is characterized in that that the closed nature. The method according to claim 1,
When the disc 200 is suddenly opened, a magnetic force is generated between the stopper 111 and one side of the inside of the body by repulsive force between the magnets, The swing check valve having an impact damper. The method according to claim 1,
When magnets of the same polarity are formed on the fluid inlet 300 contacting the disk 200 and the disk 200 and the disk 200 is abruptly closed by a suddenly opened reaction, (300) to prevent shocks between the fluid inlets (300). The method according to claim 1,
A spring is formed on one side of the inside of the body which abuts against the stop 111 or the stop 111 so that the shock between the stop 111 and one side of the inside of the body is attenuated when the disc 200 is opened rapidly A swing check valve provided with an impact damping device. The method according to claim 1,
A spring is formed in the fluid inlet 300 contacting the disk 200 or the disk 200 so that the shock between the disk 200 and the fluid inlet 300 is attenuated when the disk 200 abruptly closes due to suddenly opened reaction. Wherein the swing check valve is provided with an impact damper. delete The method according to claim 1,
Wherein the control unit C is connected to the main control unit C 'and the main control unit C' is also connected to a plurality of other valve control units C, A swing check valve. 8. The method of claim 7,
Wherein the main controller C is connected to the smart device S so that the opening and closing state of the valve 1 can be checked and the opening and closing of the valve 1 can be controlled through the smart device S.

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