KR20150057348A - Valve device for backflow and water hammer prevention - Google Patents

Abstract

The present invention relates to a valve device for preventing water hammer and backflow and, more specifically, to a valve device for preventing water hammer and backflow including a hollow valve body wherein a flow passage is formed; an opening and closing unit formed in the valve body to open and close the flow passage; an inflow unit formed on one end of the valve body to flow a fluid inside the flow passage; and a buffering opening and closing unit pressed to one side by elasticity and formed on the flow passage of the valve body to open and close the end of the inflow unit. When the flow passage is open by the opening and closing unit, the buffering opening and closing unit is moved by the pressure of the fluid supplied through the inflow unit so that the inflow unit is opened. When the flow passage is closed by the opening and closing unit, the buffering opening and closing unit is restored as the pressure of the fluid supplied through the inflow unit is decreased so that the inflow unit is closed by the buffering opening and closing unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve device for preventing backflow and water hammer,

The present invention relates to a valve device, and more particularly, to a valve device capable of preventing back flow, mitigating a water hammer phenomenon, easily responding to thermal expansion by heating, To a valve device for preventing backflow and preventing water hammer.

Generally, a pipeline is installed to move a fluid or a gas in one direction, and various valves are installed and used to control the supply of such fluid or gas.

These valves are equipped with check valves, which are installed in pipelines to prevent backflow of the fluid flowing in the pipeline and to flow only in one direction, which is opened by the fluid pressure. If the flow of the fluid stops or flows backward, The valve is automatically closed by a spring for pressing the valve plate or the like.

Here, a water hammer is a water hammer that can cause water hammer. When a fluid flows inside a pipe, sudden pump operation is stopped due to power failure or malfunction. Accordingly, the kinetic energy of the fluid is converted into pressure energy as the pressure in the tube rises or falls rapidly due to a sudden change in the flow rate of the fluid flowing through the tube, and a high pressure is generated immediately before the valve. .

Such a water hammer causes the valve plate to abruptly repeatedly bump into the valve seat, resulting in abrasion or damage such as damage to pipes, valves, and peripheral devices, thereby shortening the service life.

As a conventional technique for preventing such a water hammer phenomenon, a check valve of Korean Utility Model Registration No. 20-192319, a check valve of a wafer type tilting disc for preventing backflow of Korean Patent Laid-Open Publication No. 1999-018545, A check valve for buffering the water hammer and a water shock buffering countervalue of Korean Utility Model Registration No. 20-0165946 are known.

However, the prior art has a disadvantage in that the closing speed of the plate or disk of the check valve is delayed by a predetermined time by a method of installing a spring or the like on the check valve, and the back pressure on the valve plate itself of the check valve can not be reduced .

In other words, when the valve plate of the check valve is closed to the valve seat by the fluid backflow, a considerable back pressure is generated in the valve plate due to the interruption of the fluid flow flowing in one direction. In the conventional check valve, Since there is no shock absorber of any type, it is necessary to withstand only the valve plate against the back pressure of the fluid, and this phenomenon repeatedly occurs, which shortens the service life of these parts.

Further, when the pipes are mutually connected, a separate flange is formed at both ends of the pipe, and the portions where the flanges come in contact with each other are sealed with gaskets, and these flanges are screwed together with fixing bolts.

However, when heated by the temperature of the fluid supplied along the conduit or by other devices around the conduit, the connected conduit is pulled by thermal expansion, the tensioned conduit is subjected to a connection load with the other conduit to which it is connected, If the water hammer occurs, the pipeline is damaged and water leakage occurs.

Therefore, there is a desperate need to develop a technique that can mitigate backlash and impact caused by water hammer phenomenon, thereby extending the life span.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a valve body having a valve body through which an internal passage is formed and an opening / closing part for opening / And a buffer opening / closing portion is provided in the flow path of the valve body so as to open and close the flow path by opening and closing the end portion of the inflow portion by the water pressure so that the supply and shutoff of the fluid can be controlled, Preventing reverse flow, preventing water hammer phenomenon, easily responding to thermal expansion due to heating, preventing breakage and leakage, increasing lifetime and improving product reliability, It is an object to provide a device.

According to an aspect of the present invention, there is provided a valve device comprising: a valve body having a passage formed therein so as to communicate with the passage body; an opening / closing part provided in the valve body for opening and closing the passage; And a cushioning opening / closing part which is pressurized to one side by elasticity and provided to the flow path of the valve body so as to open and close the end part of the inflow part by water pressure, and when the flow path is opened / closed by the opening / The buffer opening / closing portion is moved by the pressure of the fluid supplied through the inlet portion to open the inlet portion, and when the flow path is closed by the opening / closing portion, the pressure of the fluid supplied through the inlet portion is lowered, Is returned to the original state to close the inflow part.

Preferably, the inflow portion includes an inflow block screwed to one end of the flow path of the valve body, an inflow hole communicated with the inside of the inflow block to supply fluid, and an edge of the inflow hole corresponding to the cushioning opening / And an escape opening formed along the opening.

In addition, a flange is formed at both ends of the valve body. The inlet includes an inlet block screwed to one end of the flow path of the valve body, an inlet hole for passing the fluid through the inlet block, An inlet hole formed along an edge of the inflow hole so as to correspond to the opening and closing part, an inflow flange formed at an end of the inflow block corresponding to the flange of the valve body, and a seal provided between the flange of the valve body and the inflow flange, And the flange of the valve body and the inlet flange are mutually fixed by a fixing member.

In addition, the flow path of the valve body may be formed with a guide path having an inner diameter larger than that of the other end of the flow path, the inflow part being formed with an inflow hole therein, An inflow block for inserting one end of the inflow pipe into the valve body, and an inlet block formed in the inflow block for inserting the other end of the inflow pipe into the inflow block, And an air hole formed along an edge of the inflow hole so as to correspond to the buffer opening and closing part. The inflow pipe is movable along the guide passage by an external impact, a water hammer phenomenon and a tensile force, To mitigate the impact.

Further, a packing member is further provided along the outer periphery of one end of the inflow pipe.

The packing member may be provided at a portion of the one end of the inflow pipe which is adjacent to the buffer opening and closing portion so as to prevent water leakage due to a water hammer phenomenon generated in the opposite direction of supply when the flow passage is closed by the opening / And a second packing formed in the direction of the inlet block from the first packing and secondarily packing the fluid in the flow passage.

Further, an auxiliary packing part is further provided on the inner side of the insertion hole of the inflow block.

The buffer opening / closing portion may include a buffer body provided in the flow passage, a plurality of open holes through which the fluid passes, a guide body formed in the direction of the inlet, a movable body along the guide portion of the buffer body, And an elastic member provided between the buffering body and the opening and closing head for pressing the opening and closing head toward the inlet, wherein the opening and closing part opens the oil passage by the opening and closing part, The flow path is closed or supplied by the opening and closing part to a fluid pressure of a predetermined pressure or lower than the predetermined pressure, The opening / closing pad is returned to the original state by the elastic member to close the inlet portion .

The opening and closing head includes a central portion to be positioned in the inflow hole when the inflow portion is brought into contact with the inflow portion, and an opening and closing pad having elasticity and formed along an edge of the center portion to be in contact with the air hole.

Also, the opening / closing pad is detachably attached, and an installation groove is formed along an edge of the central portion, and is detachably attached to the installation groove.

The elastic member is provided with a support bracket between the cushioning body and the elastic member so as to support one end, and a fixing groove is formed in the opening-closing head so that the other end is inserted.

As described above, according to the valve device for preventing backflow and water hammer according to the present invention, it is possible to open and close the flow path, to control supply and interruption of the fluid, to prevent backflow of the fluid by the buffer opening / closing part, And it is a very useful and effective invention that can easily cope with thermal expansion due to heating to prevent breakage and leakage, increase lifetime, and improve product reliability.

1 is a view showing a valve apparatus according to the present invention,
2 is an exploded view of a valve device according to the present invention,
3 is a view showing a buffer opening / closing part according to the present invention,
FIG. 4 is a view showing an embodiment of an inlet according to the present invention,
FIG. 5 is a view showing another embodiment of the inlet according to the present invention,
6 is a view showing another embodiment of the inlet according to the present invention,
7 is a view showing a fluid supply state by the operation of the buffer opening / closing part according to the present invention,
8 is a view showing an operating state of an inflow portion and a buffer opening / closing portion of another embodiment according to the present invention,
9 is a view showing another embodiment of the shock absorber opening / closing part according to the present invention,
10 is a view showing a state in which a supporting bracket is further provided in the buffer opening / closing part according to the present invention.

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

It should be noted that the present invention is not limited to the scope of the present invention but is only illustrative and various modifications are possible within the scope of the present invention.

FIG. 1 is a view showing a valve apparatus according to the present invention, FIG. 2 is an exploded view of a valve apparatus according to the present invention, FIG. 3 is a view showing an embodiment of an inlet unit according to the present invention, FIG. 4 is a view showing another embodiment of the inlet according to the present invention, FIG. 5 is a view showing still another embodiment of the inlet according to the present invention, FIG. 6 is a view showing the buffer opening / FIG. 7 is a view showing a fluid supply state by the operation of the buffer opening / closing part according to the present invention, FIG. 8 is a view showing an operating state of the inlet part and the buffer opening / closing part of another embodiment according to the present invention, 9 is a view showing another embodiment of the shock absorber opening / closing part according to the present invention, and FIG. 10 is a view showing a state where a supporting bracket is further provided in the shock absorber opening / closing part according to the present invention.

As shown in the figure, the valve device 10 for preventing backflow and water hammer is composed of a valve body 100, an opening / closing part 200, an inflow part 300 and a buffer opening / closing part 400.

The valve body 100 is provided with a passage 110 formed therein and the opening and closing part 200 is provided in the valve body 100 to open and close the passage 110.

The opening and closing part 200 includes an opening and closing plate having the same shape as the end face of the oil passage 110 and a rotating shaft and a handle for opening and closing the oil passage 110 by rotating the opening and closing plate.

The inflow portion 300 is provided at one end of the valve body 100 to introduce the fluid into the flow path 110.

The buffer opening and closing part 400 is pressed to one side by elasticity and is provided in the flow path 110 of the valve body 100 to open and close the end of the inlet part 300 by water pressure.

When the flow path 110 is opened and closed by the opening and closing part 200, the pressure of the fluid supplied through the inlet part 300 is controlled by the buffer opening / closing part 400 Is moved to open the inflow portion 300.

Conversely, when the flow path 110 is closed by the opening and closing part 200, as the pressure of the fluid supplied through the inlet part 300 is lowered, the buffer opening / closing part 400 is returned to the original state to close the inlet part 300 do.

This prevents the fluid from flowing backward and mitigates the water hammer phenomenon that occurs when the flow path 110 of the opening and closing part 200 is opened and closed by the elasticity of the buffer opening / closing part 400.

3, the buffer opening / closing unit 400 includes an impact buffering body 410, an opening / closing head 420, and an elastic member 430.

The buffer body 410 is provided in the flow path 110 and has a plurality of open holes 412 through which fluids pass and a guide part 414 in the direction of the inlet part 300.

The opening and closing head 420 is provided movably along the guide portion 414 of the cushioning body 410 and is provided for opening and closing the inlet portion 300 in contact with the inlet portion 300.

The elastic member 430 is provided between the buffering body 410 and the opening and closing head 420 to press the opening and closing head 420 toward the inlet 300.

When the opening 110 is opened by the opening and closing part 200, the opening / closing head 420 is moved to the buffering body 410 by the fluid pressure supplied from the inlet 300, The inlet 300 is opened and the fluid is supplied.

When the fluid 110 is closed or supplied by the opening and closing part 200 to a pressure lower than a predetermined pressure, the opening and closing head 420 is returned to the original state by the elastic member 430 to close the inlet 300, .

As shown in FIG. 4, the inlet 300 includes an inlet block 310, an inlet hole 320, and an air hole 330.

The inflow block 310 is screwed to one end of the flow path 110 of the valve body 100 and the inflow hole 320 is provided inside the inflow block 310 for supplying fluid.

The air hole 330 is formed along the edge of the inflow hole 320 so as to correspond to the buffer opening / closing part 400 to be contacted.

As the buffer opening / closing part 400 is seated on the air hole 330, the fluid can be prevented from flowing backward easily.

5, the inlet 300 'of another embodiment includes an inlet block 310', an inlet hole 320 ', an air hole 330', an inlet flange 340 'and a sealing portion 340' (350 ').

Prior to this, a flange 120 is formed at both ends of the valve body 100.

The inflow block 310 'is screwed to one end of the flow path of the valve body 100 and the inflow hole 320' is provided inside the inflow block 310 'to be supplied with fluid.

The opening 330 'is formed along the edge of the inflow hole 320' so as to correspond to the cushioning opening and closing part 400 to be contacted and the inflow flange 340 'corresponds to the flange 120 of the valve body 100 Is formed at the end of the inlet block 310 '.

A sealing portion 350 'is also provided between the flange 120 of the valve body 100 and the inlet flange 340' to prevent fluid from leaking.

Here, the flange 120 of the valve body 100 and the inlet flange 340 'are mutually fixed by the fixing member 360'.

The fixing member 360 'is composed of a bolt and a nut and is fixed through the flange 120 of the valve body 100 and the inlet flange 340' so that the flange 120 of the valve body 100, (340 ') are mutually fixed.

Yet another embodiment of the inflow section 300 "comprises an inflow tube 310 ", an inflow block 330 " and an air hole 340" as shown in FIG.

First, the flow path 110 of the valve body 100 is formed with a guide flow path 112 having an inner diameter larger than that of the other end of the flow path.

An inflow hole 320 "is formed in the inflow pipe 310" and an end 312 "is protruded outward so as to contact the guide flow passage 112.

The inlet block 330 "is formed with an insertion hole 332" for inserting the other end of the inlet pipe 310 "and is screwed to one end of the oil passage 110 of the valve body 100, 310 "to the valve body 100. The valve body < RTI ID = 0.0 > 100 < / RTI >

The air vent hole 340 " is formed along the edge of the inflow hole 320 " so as to correspond to the cushioning opening / closing part 400 to be contacted.

7, the fluid is supplied by the operation of the opening / closing part 200, and the buffer opening / closing part 400 is operated by the pressure of the supplied fluid so that the inflow part 300 ' Quot; 300 ") is opened.

8, the inflow pipe 310 "of the inflow portion 300" is movable along the guide flow path 112 by an external impact, a water hammer phenomenon, and thermal expansion, To mitigate the impact.

The length of the guide channel 112 is set to be at least 1.5 times the length of the end 312 '' of the inlet pipe 310 ' ") Of one end 312"

The inflow pipe 310 '' can be moved along the guide passage 112 to secure a space that can be stretched even if it is thermally expanded by heating, thereby preventing breakage in the conventional connection part, thereby preventing leakage.

For reference, the length of the tube thermally expanded by the heat applied to the pipeline can be tensile by 20 cm or more, and it can be easily handled by the inflow pipe 310 "

Here, a packing member 350 "is further provided along the outer periphery of one end of the inflow pipe 310 ".

This packing member 350 "comprises a first packing 352" and a second packing 354 ".

The first packing 352 "is provided in the direction of the buffer opening / closing part 400 of the one end 312" of the inlet pipe 310 ", so that when the oil passage 110 is closed by the opening / closing part 200, Thereby preventing water leakage due to the generated water hammer phenomenon.

A plurality of second packings 354 "are formed in the direction of the inlet block 330 " from the first packing 352 ".

In other words, the first packing 352 " packs the leak water first, and the second packing 354 "packs the leak water effectively, thereby effectively preventing leakage.

Further, an auxiliary packing portion 360 "may be further provided on the inner side of the insertion hole 332" of the inflow block 330 ".

8, the opening / closing head 420 has elasticity with the central portion 422 to be positioned at the inflow hole 320 when the opening and closing head 420 is in contact with the inflow portion 300, And an opening / closing pad 424 formed along the edge of the central portion 422 as much as possible.

The opening / closing pad 424 is detachably attached to the center portion 422. The opening / closing pad 424 is formed along the edge of the center portion 422 and is detachably attached to the mounting groove 426.

Therefore, when the opening / closing pad 424 is worn out excessively, it can be easily replaced and maintenance is easy.

A locking protrusion 427 is further provided on the side surface of the mounting groove 426. A locking groove 425 for fitting the locking protrusion is formed on the opening and closing pad 424 to prevent unintended detachment .

10, the elastic member 430 is provided with a support bracket 440 between the cushioning body 410 and the elastic member 430 so as to support one end of the elastic member 430, and the opening / closing head 430 The fixing groove 450 is formed.

It is preferable that the other end of the elastic member 430 is firmly fixed by the fixing groove 450 and the support bracket 440 prevents the buffering body 410 from being damaged by the elastic member 430.

Here, the support bracket 440 may further include a separation preventing jaw 442 to prevent one end of the elastic member 430 from being seated and separated.

A flow meter or an anemometer can be installed in the valve body 100. The flow meter and the flow meter are preferably installed in the valve body 100 so that the flow rate and the flow velocity can be measured at the site where the buffer opening and closing part 400 is located.

The valve body 100 is provided with a sensor installation part 130 for installing the flowmeter or the flowmeter so that the flowmeter or the flowmeter can be detachably attached to the valve body 100. The flowmeter and the flow rate can be selectively measured as needed.

10: valve device 100: valve body
110: Flow path 112: Guide path
120: flange 200: opening / closing part
300 ', 300', 300 ": inlet 310, 310 ', 310": inlet block
320, 320 ', 320 ": Inflow hole 330, 330', 330"
340 ': inlet flange 350': sealing part
400: buffer opening / closing part 410: buffer body
420: opening / closing head 422:
424: opening / closing pad 425:
426: Installation groove 427:
430: elastic member 440: support bracket
450: Fixing groove

Claims (10)

A valve body through which the passage is formed;
An opening / closing part provided in the valve body for opening / closing the flow path;
An inflow portion provided at one end of the valve body for introducing fluid into the flow path; And
And a buffer opening / closing part provided in the flow path of the valve body so as to open and close the end of the inflow part by water pressure,
When the flow path is opened or closed by the opening / closing part, the buffer opening / closing part is moved by the pressure of the fluid supplied through the inflow part to open the inflow part,
Wherein when the flow path is closed by the opening / closing part, the buffer opening / closing part is returned to the original state as the pressure of the fluid supplied through the inlet is lowered to close the inlet part.
The apparatus according to claim 1,
An inlet block screwed into one end of the flow path of the valve body;
An inflow hole through which the fluid is supplied into the inflow block; And
And an air hole formed along an edge of the inflow hole so as to correspond to the cushioning opening and closing part to be contacted.
The method according to claim 1,
Flanges are formed on both end portions of the valve body,
Wherein:
An inlet block screwed into one end of the flow path of the valve body;
An inflow hole through which the fluid is supplied into the inflow block;
An air hole formed along an edge of the inflow hole so as to correspond to the cushioning opening and closing part to be contacted;
An inlet flange formed at an end of the inlet block to correspond to a flange of the valve body; And
And a sealing portion provided between the flange of the valve body and the inlet flange,
Wherein the flange of the valve body and the inlet flange are mutually fixed by a fixing member.
The method according to claim 1,
Wherein a flow path of the valve body is formed with a guide flow path having an inner diameter larger than that of the other end of the flow path,
Wherein:
An inflow pipe having an inflow hole therein and having one end protruded outward to be in contact with the guide channel;
An inlet block formed in the inside of the inlet pipe for inserting the other end of the inlet pipe and screwed to one end of the flow path of the valve body to install one end of the inlet pipe on the valve body; And
And an air hole formed along an edge of the inflow hole so as to correspond to the buffer opening / closing part to be contacted,
Wherein the inflow pipe is movable along the guide passage by an external impact, a water hammer phenomenon and a tensile force, and alleviates an impact with the elasticity of the buffer opening / closing part.
5. The method of claim 4,
And a packing member is further provided along an outer periphery of one end of the inflow pipe.
6. The battery pack according to claim 5,
A first packing provided at a portion of one end of the inflow pipe in the direction of the buffer opening and closing portion to prevent leakage due to a water hamper phenomenon generated in a direction opposite to the supply port when the flow passage is closed by the opening and closing portion; And
And a second packing formed in the direction of the inlet block from the first packing to secondarily pack the fluid in the flow path.
5. The method of claim 4,
And an auxiliary packing portion is further provided on an inner surface of the insertion hole of the inflow block.
The battery pack according to any one of claims 2 to 4, wherein the buffer opening /
A buffer body provided in the flow path and formed with a plurality of open holes through which fluids pass, the buffer body having a guide portion in the direction of the inlet;
An opening / closing head provided movably along the guide portion of the cushioning body for opening and closing the inlet portion; And
And an elastic member provided between the buffering body and the opening and closing head to press the opening and closing head toward the inlet,
When the flow path is opened by the opening / closing part, the opening part is opened by the fluid pressure supplied from the inflow part toward the cushioning body,
Wherein the opening / closing part returns to the original state by the elastic member to close the inlet part when the fluid pressure to be closed or supplied by the opening / closing part is lower than a certain pressure.
9. The apparatus according to claim 8,
A central portion to be positioned in the inflow hole upon contact with the inflow portion; And
And an opening / closing pad having elasticity and formed along an edge of the center portion so as to contact the air hole.
10. The method of claim 9,
Wherein the opening / closing pad is detachably attached, and an installation groove is formed along an edge of the center portion, and is detachably attached to the installation groove.

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