KR101367709B1 - Pressure reducing valve for controlling steady flow - Google Patents

Abstract

A pressure reducing valve for rectifying control is disclosed. The pressure reducing valve for rectification control of the present invention can stabilize the decompression function from the water shock or the hunting phenomenon by mitigating and eliminating the water shock and the hunting phenomenon at the inlet side and the outlet side of the pressure reducing valve at the same time. It includes, the water inlet pipe is formed horizontally on the inlet side of the housing, the water outlet pipe is formed horizontally on the outlet side of the housing, the inside of the housing is provided with a disk, stem and piston along the direction of water flow from the inlet side to the outlet side In the pressure reducing valve composed of a known double-chamber pressure reducing structure, the pressure reducing valve, the inlet is provided vertically through the fixing portion inside the water inlet pipe, a plurality of inlet holes are formed in the horizontal direction Side water hammer offset plate; It is provided to stand vertically through the fixing portion inside the discharge pipe, characterized in that it comprises an outlet side water hammer offset plate is formed in the horizontal direction a plurality of water discharge holes of a diameter smaller than the diameter of the water inlet hole.

Description

Pressure reducing valve for controlling steady flow

The present invention relates to a pressure reducing valve for rectification control, and more particularly, by reducing the water shock or the hunt due to pressure change in the pipe at the same time to relieve the pressure inlet and outlet side of the pressure reducing valve to reduce the pressure reducing function from the water shock or hunting phenomenon. A pressure reducing valve for rectification control can be stabilized.

In general, the fluid supplied to the reservoir, the pressurized plant, the village, the industrial complex, the shopping mall, etc. is branched from the main supply pipe and supplied to each use place. Where a branch is formed in the main supply pipe, a valve, a pump, and the like are installed to supply the fluid to the respective destinations normally.

However, in supplying the fluid to the respective destinations as described above, the valve connected to the branch pipe in the main supply pipe or another pipe branched in the branch pipe may be rapidly opened or closed, or the pump may be suddenly started and stopped. When the flow rate changes rapidly. In this way, if the flow rate changes rapidly, the rise and fall of the fluid pressure occurs, which causes a hunting phenomenon of the set pressure of the fluid.

That is, the hunting phenomenon is a phenomenon in which a control amount by a proportional operation exceeds or falls below a target value periodically and is not stable, and hunting is an undesired phenomenon in control, and hunting is a control method. This means that it does not match the dynamic characteristics of the control target.

Thus, a pressure reducing valve is generally used to prevent the hunting phenomenon as described above. The globe type pressure reducing valve will be described as an example.

As shown in Fig. 9, the conventional globe-type pressure reducing valve allows a fluid (water) supplied at a high pressure to be used at a low pressure in use (hereinafter referred to as "destination"). That is, it serves to reduce the excessive inlet pressure to a predetermined constant pressure and send it to the outlet.

Therefore, in order to perform the decompression function through the conventional globe-type pressure reducing valve, a pressure reducing valve having a diameter smaller than the main pipe is used. For example, if the main pipe is 100 mm, the pressure reducing valve is required at the outlet side by applying a 50-80 mm diameter. To meet the flow rate.

However, the conventional globe type pressure reducing valve is selected in consideration of the maximum inlet pressure and the allowable flow rate reducing ability to satisfy the pressure and flow rate required at the outlet side. However, in selecting the conventional globe-type pressure reducing valve, there is a problem that it is difficult to consider the vibration and instability generated in the pipe.

Therefore, conventionally, a water pressure relief valve, a disk support method, a pressure adjustment tank, a surge pressure, and the like have been used as a structure for preventing water shock while solving the problems of the globe type pressure reducing valve as described above.

However, the water pressure regulator has a short lifespan because the pilot easily breaks due to frequent water shocks.

In addition, the disk support method has a problem that the life of the spring is rapidly lost due to the water shock generated in various forms, similar to the water pressure pressure valve has a short life.

1. Republic of Korea Patent No. 10-1047850 (Registration Date: March 28, 2005) 2. Republic of Korea Patent No. 10-0454900 (Registration Date: October 20, 2004)

The technical problem of the present invention is to increase the pressure response speed and accuracy through the double-chamber structure in the water flow direction, as well as to rectify the water shock at the inlet and outlet side of the pressure reducing valve at the same time to eliminate the It is to provide a pressure reducing valve.

In addition, another technical problem of the present invention is to equalize the diameter of the water outlet holes formed in the outlet water hammer offset plate that the water shock generated on the pipe first reaches, thereby calming the water impact through the outlet water hammer offset plate. It is to provide a pressure reducing valve for rectification control to mitigate the wave and vibration of the.

In addition, another technical problem of the present invention is that the water discharge hole is formed as a tapered hole narrowing in the direction of the water discharge side in the direction of the water inlet side, water shock or hunting phenomenon is generated in the opposite direction of the water flow direction In this case, it is to provide a pressure reducing valve for rectifying control to sufficiently offset the water shock or hunting phenomenon.

In addition, another technical problem of the present invention, by forming a plurality of water inlet holes having a diameter larger than the water discharge hole in the inlet side water hammer and the plurality of small diameter water inlet holes between the water inlet holes, It is to provide a pressure reducing valve for rectifying control to maximize the amount of water passing through the water hammer offset plate.

In addition, another technical problem of the present invention, by further connecting the inlet and outlet pipes to the water inlet pipe and the water outlet pipe of the pressure reducing valve, the pressure control for rectification control to be installed easily connected to the piping line of the existing plant To provide a valve.

In addition, another technical problem of the present invention is to provide a pressure reducing valve for rectification control to more firmly fix the inlet-side water hammer offset plate and the outlet-side water hammer offset plate to the water inlet pipe and the water discharge pipe.

The technical problem, according to the present invention, comprises a housing provided in the horizontal direction, the water inlet pipe is formed horizontally on the inlet side of the housing, the water discharge pipe is formed horizontally on the outlet side of the housing, the inlet inside the housing A pressure reducing valve composed of a known double-chamber pressure reducing structure in which a disk, a stem, and a piston are provided along a direction in which water flows from a side to an outlet side, wherein the pressure reducing valve is vertically fixed through an inside of the water inlet pipe. An entrance side water hammer offset plate provided to stand up and having a plurality of water inflow holes formed in a horizontal direction; It is provided to stand vertically through the fixing part inside the discharge pipe, by a pressure reducing valve for rectification control including a water outlet offset plate formed in the horizontal direction a plurality of water discharge holes having a diameter smaller than the diameter of the water inlet hole Is achieved.

In addition, the water discharge holes are characterized in that the same diameter is formed.

In addition, the water discharge hole is characterized in that it is composed of a tapered hole formed to be narrow in the direction of the water discharge side in the direction of the water inlet side.

In addition, the inlet-side water hammer offset plate, characterized in that it further comprises a plurality of small diameter water inlet holes formed between the water inlet holes with a diameter smaller than the diameter of the water outlet holes.

In addition, the pressure reducing valve, the outlet side having an inlet connecting pipe connected to the outer periphery of the water inlet pipe and having a connecting flange, and a connecting flange connected to the outer periphery of the water discharge pipe by a fastening of the nut. It further comprises a connector.

In addition, the fixing part is formed on the inner circumferential surface of the water inlet pipe or the water discharge pipe and the engaging projection which is in close contact with the inner circumference of the inlet side water hammer offset plate or outlet side water hammer offset plate, the inlet connection pipe or outlet side connection It is provided in the connection portion of the pipe is characterized in that it comprises a pressing end for pressing the outer periphery of the outer surface of the inlet side water hammer offset plate or outlet side water hammer offset plate to fix the inlet side water hammer offset plate or outlet side water hammer offset plate.

As described above, the present invention has a superior effect of improving the decompression efficiency and reducing the head and vibration by increasing the decompression response speed and accuracy through the double chamber type structure in the water flow direction. As the hunting phenomenon is alleviated at the inlet side and the outlet side of the pressure reducing valve at the same time, the pressure reducing function can be stabilized from water shock or hunting phenomenon, and there is no need to install a separate water shock prevention device.

In addition, the present invention, the water discharge holes formed in the outlet water hammer offset plate to reach the water shock generated on the pipe for the first time to calm the water shock through the outlet water hammer offset plate to reduce the wave and vibration of the water hammer By mitigating, there is an effect of providing a pressure reducing valve that can further improve the mitigation effect of water shock.

In addition, the present invention, the water discharge hole is composed of a tapered hole that narrows in diameter in the direction of the water discharge side in the direction of the water inlet side to sufficiently offset the water shock even when water shock occurs in the opposite direction of the water flow direction. By doing so, there is an effect of providing a pressure reducing valve that can further improve the water shock alleviation effect.

In addition, the present invention forms a plurality of water inlet holes having a larger diameter than the water outlet holes in the inlet water hammer offset plate, and a plurality of small diameter water inlet holes are formed between the water inlet holes to pass through the inlet water hammer offset plate. By increasing the amount of water to the maximum, there is also an effect of providing a pressure reducing valve with a smooth flow of water.

In addition, the present invention, by further connecting the inlet side and the outlet side of the water inlet pipe and the water outlet pipe of the pressure reducing valve to be easily connected to the piping line of the existing plant to provide installation convenience, It is easy to maintain and also reduces maintenance costs.

In addition, the present invention, it is possible to more securely fixed to the water inlet pipe and the water outlet pipe to the water inlet and outlet side of the water hammer offset plate and the outlet water hammer offset plate, the effect that can be extended to a maximum life There is also.

1 is an external view showing a pressure reducing valve according to the present invention.
2 is a view showing the inside of the pressure reducing valve according to the present invention.
FIG. 3 is a view illustrating an inside of part A of FIG. 1.
4 is a view illustrating the inside of a portion B of FIG. 1.
5 is a view showing the inlet-side water hammer offset plate according to the present invention.
6 is a view showing an outlet side water hammer offset plate according to the present invention.
7 is an enlarged cross-sectional view of the water discharge hole formed in the outlet side water hammer offset plate according to the present invention.
8 is a piping diagram showing an installation state of a pressure reducing valve according to the present invention.
9 is a cross-sectional view showing a conventional pressure reducing valve.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the following description of the present invention, a description of a known function or configuration will be omitted to clarify the gist of the present invention.

1 is an external view showing a pressure reducing valve according to the present invention, Figure 2 is a view showing the inside of the pressure reducing valve according to the present invention, Figure 3 is a view showing the inside of the A part of Figure 1, Figure 4 1 is a view showing the inside of the portion B of Figure 1, Figure 5 is a view showing the inlet side water hammer offset plate according to the invention, Figure 6 is a view showing the outlet side water hammer offset plate according to the invention, Figure 7 8 is an enlarged cross-sectional view of a water discharge hole formed in the outlet side water hammer offset plate according to the present invention, and FIG. 8 is a piping diagram showing an installation state of a pressure reducing valve according to the present invention.

As shown in the figure, the pressure reducing valve 1 according to the present invention includes a housing 11 provided in the horizontal direction, the inlet side of the housing 11, the water inlet pipe 16 is formed horizontally The water outlet pipe 17 is horizontally formed at the outlet side of the housing 11, and the disc 12, the stem 13, and the piston 14 are disposed in the housing 11 along the direction in which water flows from the inlet side to the outlet side. Is provided, and both sides of the inside of the housing 11 include a pressure reducing valve 1 composed of a known double chamber pressure reducing structure in which a double chamber 15 is provided.

Therefore, the pressure reducing valve 1 having the double chamber pressure reducing structure configured in the same direction as the fluid flow direction as described above has less friction acting on the fluid than the pressure reducing valve 1 in the vertical direction of the conventional globe type. The advantage is that more flow rates can be sent at the same aperture.

In addition, the pressure reducing valve 1 according to the present invention is provided to stand vertically inside the water inlet pipe 16 so that water passes through the inlet-side water hammer offset plate 2 and vertically inside the discharge pipe. It includes an outlet side water hammer offset plate (3) is provided.

In addition, the inlet side water hammer offset plate 2 according to the present invention is provided to stand vertically through the fixing part 4 in the water inlet pipe 16, and a plurality of water inlet holes 21 are provided. It is formed in the horizontal direction.

That is, the water inlet hole 21 is formed in the circumference of the center and the center of the inlet side water hammer offset plate (2) to pass the water flowing into the inlet side of the pressure reducing valve 1 to mitigate water shock or hunting Play a role.

Further, a plurality of small diameter water inlet holes 22 may be formed between the water inlet holes 21 of the inlet side water hammer offset plate 2 to have a diameter smaller than that of the water outlet holes 31. Can be.

That is, the reference of the large diameter of the water inlet hole 21 should be a structure in consideration of the maximum flow rate, the small diameter water inlet hole 22 is the flow of flow in the plate between the large diameter water outlet hole 31 It serves to prevent this from interfering. For this reason, the water discharge hole 31 having the largest diameter is arranged in the inlet side water hammer offset plate 2, and the small diameter water inlet holes 22 are proportional to the sum of the flow rates of the large diameter water discharge holes 31. It is preferable to arrange them.

Accordingly, a plurality of water inflow holes 21 having a diameter larger than that of the water discharge holes 31 are formed in the inlet side water hammer offset plate 2, and a plurality of small diameter water inflow holes 21 are formed between the water inflow holes 21. By forming 22, the water flow can be more smoothly by increasing the amount of water passing through the inlet side water hammer offset plate 2 to the maximum. In addition, through the inlet side water hammer offset plate 2 and the water inlet hole 21, it is possible to alleviate the wave and vibration of the water hammer passing through the inlet water hammer offset plate (2).

In addition, the outlet side water hammer offset plate 3 according to the present invention is provided to stand vertically through the fixing portion 4 inside the discharge pipe, a plurality of diameters smaller than the diameter of the water inlet hole 21 Water discharge hole 31 is formed in the horizontal direction.

In addition, the water discharge holes 31 are preferably formed to have the same diameter so as to mitigate water shock or hunting phenomenon of the discharged water. In other words, by making the water discharge holes 31 formed in the outlet side water hammer offset plate 3 to which the water hammer or the hunting phenomenon occurring on the pipe first reach reach the same, the water hammer through the outlet water hammer offset plate 3 is the same. In addition, the hunting phenomenon can be calmed to mitigate the shock and vibration of water hammer.

The water discharge hole 31 is tapered so that the diameter is narrowed in the direction of the water discharge side in the direction of the inflow of water so that even if the water shock is generated in the opposite direction of the flow direction of the water sufficiently It is preferable to consist of a hole.

In other words, when the water discharge hole 31 is configured as a taper hole that narrows in the direction of the water discharge side in the direction of water inflow, water shock or hunting may occur in the opposite direction to the flow direction of the water. The effect of alleviating the shock and hunting phenomenon is better than the straight hole.

In addition, the pressure reducing valve (1) according to the present invention is connected to the outer periphery of the water inlet pipe (16) by an inlet connection pipe (18) having a connection flange (181) and the water discharge pipe ( It further comprises an outlet connector 19 having a connecting flange 191 connected to the fastening of the nut on the outer periphery of 17).

Therefore, through the inlet-side connection pipe 18 and the outlet-side connection pipe 19, it is possible to simply connect the pressure reducing valve 1 according to the present invention to the piping line of the existing plant. Therefore, the pressure reducing valve 1 according to the present invention has the advantages of convenience in installation, easy maintenance, and reducing maintenance costs.

On the other hand, the fixing part according to the present invention can be fixed to the inner periphery of the water inlet pipe 16 or the water outlet pipe 17 by welding the circumference of the inlet side water hammer offset plate (2) or the outlet side water hammer offset plate (3). It may be composed of a welded portion (not shown), or the periphery of the inlet side water hammer offset plate 2 or the outlet side water hammer offset plate 3 of the water inlet pipe 16 or the water discharge pipe 17. It may be composed of a fastening portion (not shown) that can be fixed to the inner periphery by the fastening, or in the manufacturing step of the housing 11 of the pressure-reducing valve 1, the inlet side water hammer offset plate (2) or outlet It may be composed of an integral connection part (not shown) that integrally connects the circumference of the side water hammer offset plate 3 to the inner circumference of the water inlet pipe 16 or the water outlet pipe 17, or a fixed part configured separately. (4) and the inlet side water hammer offset plate (2) and the outlet side water hammer offset plate (3) in the water inlet pipe (16) or the water discharge pipe (17) Can be fixed to the periphery, in the accompanying drawings shows a fixing portion 4 is configured separately.

Accordingly, the separately fixed part 4 is formed to protrude on the inner circumferential surface of the water inlet pipe 16 or the water outlet pipe 17 so that the inlet side water hammer offset plate 2 or the outlet side water hammer offset plate 3 can be formed. It is provided in the connection part of the engaging protrusion 41 and the inlet side connection pipe 18 or the outlet side connection pipe 19 which the inner periphery of a close contact is carried out, and the said inlet side water hammer offset plate 2 or the outlet side water hammer offset plate It can be composed of a pressing end 42 for pressing the periphery of the outer surface of (3) to fix the inlet side water hammer offset plate 2 or the outlet side water hammer offset plate 3. Therefore, the inlet side water hammer offset plate 2 and the outlet side water hammer offset plate 3 are more firmly connected to the water inlet pipe 16 and the water discharge pipe 17 through the separately configured fixing part 4. By fixing, the durability of the pressure reduction valve 1 can be further improved, and the life of the pressure reduction valve 1 can be extended to the maximum.

Hereinafter, the working relationship of the pressure reducing valve according to the present invention configured as described above is as follows.

1 to 8, in the state where the pressure reducing valve according to the present invention is mounted to be connected to the pipe, when water shock or hunting occurs on the pipe, water passes through the inlet water hammer offset plate (2). As a result, the water shock wave and vibration are alleviated.

Water passing through the inlet side water hammer offset plate 2 and the vibration of the water hammer is alleviated passes through the inside of the pressure reducing valve 1 and passes through the outlet side water hammer offset plate 3, thereby causing the wave of water hammer. Excessive vibration is alleviated again.

Therefore, as described above, the pressure reducing valve of the present invention has a superior effect of improving the pressure reducing efficiency and reducing the head and vibration by increasing the pressure reducing response speed and accuracy through a double chamber type structure in the water flow direction. Of course, it is a useful invention that does not need to install a separate water shock prevention device by alleviating the water shock or hunting phenomenon at the inlet and outlet side of the pressure reducing valve (1) at the same time.

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 embodiments, but, on the contrary, It is obvious to those who have. Therefore, such modifications or variations are not to be understood individually from the technical spirit or point of view of the present invention, the modified embodiments will belong to the claims of the present invention.

1: Pressure reducing valve
11: Housing
12: Disc
13: stem
14: Piston
15: chamber
16: water inlet pipe
17: water discharge pipe
18: inlet connector
181: connection flange
19: discharge connector
191: connection flange
2: entrance water hammer offset plate
21: water inlet hole
22: small diameter inflow hole
3: outlet side water hammer offset plate
31: water discharge hole
4:
41:
42: push end

Claims (6)

It includes a housing 11 provided in a horizontal direction, the water inlet pipe 16 is formed horizontally on the inlet side of the housing 11, the water discharge pipe 17 is formed horizontally on the outlet side of the housing 11, The inside of the housing 11 is provided with a disk 12, a stem 13, and a piston 14 in a direction in which water flows from the inlet side to the outlet side, and double chambers 15 are provided on both sides of the housing 11. In the pressure reducing valve (1) composed of a known double chamber pressure reducing structure is provided,
The pressure reducing valve 1,
An inlet-side water hammer offset plate (2) provided vertically through a fixing part in the water inflow pipe (16) and having a plurality of water inflow holes (21) formed in a horizontal direction; And
The outlet side water hammer offset plate (3) is provided to stand vertically through the fixing portion inside the discharge pipe, the water discharge hole 31 having a diameter smaller than the diameter of the water inlet hole 21 is formed in a horizontal direction (3) Rectification control pressure reducing valve comprising a). The method of claim 1,
Relief valve for rectification control, characterized in that the water discharge holes 31 are formed in the same diameter. 3. The method of claim 2,
The water discharge hole 31,
Rectification control pressure reducing valve, characterized in that consisting of a tapered hole formed to narrow the diameter in the direction of the water discharge side in the direction of the water inlet side. The method of claim 1,
The entrance side water hammer offset plate 2,
Rectification control pressure reducing valve, characterized in that it further comprises a plurality of small diameter water inlet hole (22) formed between the water inlet hole (21) having a diameter smaller than the diameter of the water outlet hole (31). The method of claim 1,
The pressure reducing valve 1,
An inlet connecting pipe (18) connected to the outer circumference of the water inlet pipe (16) by a fastening of a nut and having a connecting flange (181); And
Rectification control pressure reducing valve characterized in that it further comprises an outlet side connecting pipe (19) having a connecting flange (191) connected to the outer periphery of the water discharge pipe (17) by the fastening of the nut. The method of claim 5,
The fixing unit includes:
A locking protrusion 41 protruding from the inner circumferential surface of the water inlet pipe 16 or the water outlet pipe 17 to closely contact the circumference of the inner surface of the inlet water hammer offset plate 2 or the outlet water hammer offset plate 3; And
It is provided at the connecting portion of the inlet connecting pipe 18 or the outlet connecting pipe 91 to press the periphery of the outer surface of the inlet side water hammer offset plate 2 or the outlet side water hammer offset plate 3 to inlet side water hammer A pressure reducing valve for rectification control, characterized in that it comprises a push end portion (42) for fixing the offset plate (2) or the outlet side water hammer offset plate (3).

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