KR101972946B1 - Pressure control valve using venturi effect - Google Patents

Abstract

The present invention relates to a flow control pressure reducing valve using a Venturi effect, a valve body having an inflow passage and a discharge passage, which is provided inside the valve body and extends in the longitudinal direction, and has a low pressure passage in the longitudinal direction therein. The stamp is provided in the upper part of the stamp, the coil spring having an elastic force, the plate provided along the outer circumference of the stamp, the inner circumference of the stamp and the outer circumference of the plate, respectively, in the valve body A guide wall provided to guide the longitudinal movement of the stamp and to form a low pressure chamber capable of accommodating fluid, and connected to a lower portion of the stamp and moving from the inflow path to the discharge path according to the movement of the stamp. A disk having an adjustable volume of fluid flowing thereon, provided on top of the disk The disk is variable in distance with the disk to form a fluid movement path and the inside of the disk includes a pressure control passage in communication with the low pressure passage, the low pressure passage and the low pressure chamber is characterized in that the communication .
According to the present invention having the configuration as described above, because the venturi effect more stamp and disk valve moves and the size of the flow path of the fluid movement path increases more flow rate from the inlet passage to the discharge passage pressure drop in the discharge passage There is an advantage that can supply a sufficient amount of fluid while mitigating.

Description

PRESSURE CONTROL VALVE USING VENTURI EFFECT}

The present invention relates to a flow control pressure reducing valve using a venturi effect, and more particularly, a flow control pressure reduction using a venturi effect to control a flow rate by increasing a distance between a disc and a seat according to the amount of use by using a low pressure according to the venturi effect. It is about a valve.

In general, as skyscrapers continue to increase due to the development of building materials and construction technology, smooth supply of water supply and fire fighting water is a problem. Specifically, in the buildings such as high-rise apartments, the supply water pressure is increasing gradually as smooth water supply such as water supply is required even in the high-rise part. However, when the supply water pressure is gradually increased, there is a case where the flow rate is insufficient in the high-rise part due to excessive pressure and flow rate in the lower part, and the water pressure in the lower part is too high, causing problems such as breakage or leakage of piping or peripheral equipment.

In order to solve this problem, a pressure reducing valve may be used. The pressure reducing valve serves to supply the user by relatively reducing the pressure at the inlet of the fluid due to the pressure and elasticity of the spring. have.

The pressure reducing valve is provided in the body having an inlet and an outlet, and a stem for controlling the amount of fluid flowing from the inlet to the inlet by a vertical motion in the body, a disk connected to the stamp, and an inside of the body, and having a variable distance from the disk. It consists of the sheet etc. which become. In the pressure reducing valve, the disk may include a rubber having watertightness and the like, and has a structure in which the amount of fluid passing varies according to the distance between the disk and the seat. Specifically, the fluid having a high pressure at the inlet flows through the gap between the disc and the seat, so that the flow rate is faster, and thus the pressure at the outlet is relatively lower than the inlet. The reduced pressure fluid is used in applications connected to the outlet, where relatively low water pressures are available.

As a related art, Korean Patent No. 10-0991065 discloses a pressure reducing valve and a method of manufacturing the valve. The patent uses a method of adjusting the fluid and the flow rate while the fluid passage port and the disk packing is spaced apart from each other by the elasticity and pressure of the spring. However, in the conventional pressure reducing valve and the registered patent, there is a problem that a smooth flow rate is not supplied when a large amount of water is used at the place of use. That is, when a plurality of flow rates are used at the same time, the pressure on the outlet side is temporarily lowered, so that the required flow rate supply cannot be smoothly performed.

In addition, in order to solve the above problems, if the pressure on the outlet side is low by using an electric device, a method of adjusting the distance between the disc and the seat can be considered to flow a large flow rate toward the outlet, but a separate electric Installing the device is economically difficult and practical in terms of manufacturing.

(Document 0001) Republic of Korea Patent Registration 10-0991065 (Registration Date: 2010.10.25.) (Patent 0002) Japanese Patent No. 2016-17620 (published: 2016.02.01.)

The object of the present invention in view of the above point is to provide a pressure reducing valve that can increase the flow rate to the outlet without additional power.

Another object of the present invention is to provide a pressure reducing valve which is easy to manufacture and supplies a sufficient amount of fluid so as not to inconvenience the use of the fluid even when using a large flow rate at the same time of use.

Flow control pressure reducing valve using the Venturi effect according to an embodiment of the present invention for achieving the above object is provided in the valve body, the valve body provided with the inlet and outlet passages extending in the longitudinal direction and the longitudinal direction therein Stamp is provided with a low pressure flow path, the upper portion of the stamp is provided with a coil spring having elastic force, the plate provided along the circumference of the stamp. In the valve body, the guide wall and the lower part of the stamp are provided in contact with the outer circumference of the stamp and the outer circumference of the plate, respectively, and extend in the longitudinal direction to guide the longitudinal movement of the stamp and to form a low pressure chamber in which the fluid can be accommodated. A disk that is connected to and adjusts the amount of fluid flowing from the inflow path to the discharge path according to the movement of the stamp, which is provided at the top of the disk, and is provided in the seat and the disk that form the fluid movement path while varying the distance with the disk according to the movement of the stamp. And a pressure regulating passage in communication with the low pressure passage, and the low pressure passage and the low pressure chamber communicate with each other.

In addition, when the fluid flows from the inflow passage to the discharge passage, the internal pressure P ₃ of the low pressure chamber may be lower than the internal pressure P ₁ of the inflow passage.

In addition, the low pressure flow passage, the first passage communicating with the low pressure chamber in the upper portion, the second passage communicating radially provided with the pressure control passage in the lower portion and the first provided in the longitudinal direction while connecting the first passage and the second passage with each other; It includes three passages, the stamp may include a first shaft member coupled to the plate and provided with a first passage and a second shaft member coupled to the lower portion of the first shaft member and coupled to the disk and provided with a second passage. have.

In addition, the pressure regulating flow passage may be provided to extend from the low pressure flow passage to the fluid movement passage.

The pressure regulating passage may be provided in plural, and the plurality of pressure regulating passages may be provided radially around the low pressure passage.

In addition, the first three-way valve is installed in the inlet passage to control the flow direction of the fluid, the second three-way valve is installed in the discharge path and the fluid to connect the first three-way valve and the second three-way valve connected to each other It may further include a pass euro.

The throttle valve may further include a throttle valve installed in the bypass passage and configured to adjust a flow rate of the fluid flowing in the bypass passage.

The apparatus may further include a filtration unit provided along the outer circumference of the guide wall and filtering the fluid flowing from the inflow passage to the discharge passage.

According to one embodiment of the invention it is possible to increase the flow rate of the fluid flowing from the inlet to the outlet without additional power and to reduce the pressure drop in the outlet.

In addition, the required fluid flow rate can be smoothly secured regardless of the flow rate of the fluid used at the pressure reducing valve.

In addition, the structure of the stamp is subdivided into a first shaft member and a second shaft member, so that a low pressure flow path for venturi effect can be easily formed and the parts can be easily maintained.

In addition, when a stamp or the like malfunctions or stops through the bypass flow path of the pressure reducing valve, the flow rate may be adjusted while bypassing the fluid and at the same time bypassing the fluid.

1 is a cross-sectional view showing a flow control pressure reducing valve using a venturi effect according to an embodiment of the present invention.
2 and 3 are detailed views showing the opening and closing state of the fluid movement path of the flow control pressure reducing valve according to an embodiment of the present invention.
4 to 6 are enlarged cross-sectional views of a part of a flow control pressure reducing valve according to an embodiment of the present invention.
7 and 8 are a state diagram showing a bypass flow path of the flow control pressure reducing valve according to an embodiment of the present invention.
9 is an image showing the pressure distribution of the flow control pressure reducing valve according to an embodiment of the present invention.
10 is an image showing a speed distribution of the flow control pressure reducing valve according to an embodiment of the present invention.

In describing the present invention, when it is determined that detailed descriptions of related known functions or configurations may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Embodiments according to the concept of the present invention can be variously modified and can have various forms, and specific embodiments will be illustrated in the drawings and described in detail in the present specification or application. However, this is not intended to limit the embodiments in accordance with the concept of the present invention to a particular disclosed form, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. As used herein, the terms "comprise" or "having" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof that is described, and that one or more other features or numbers are present. It should be understood that it does not exclude in advance the possibility of the presence or addition of steps, actions, components, parts or combinations thereof.

Hereinafter, the present invention will be described in detail.

1 is a cross-sectional view showing a flow control pressure reducing valve using a venturi effect according to an embodiment of the present invention, Figures 2 and 3 is a flow path 130 of the flow control pressure reducing valve according to an embodiment of the present invention It is the detail which showed the opening and shutting state. In FIG. 2, the fluid movement path 130 is closed, and in FIG. 3, the fluid movement path 130 is open.

1 to 3, the flow control pressure reducing valve using the venturi effect according to the first embodiment of the present invention includes a valve body 100 having an inflow path 110 and a discharge path 120, the valve body ( 100 is provided in the interior and extends in the longitudinal direction and provided with a low pressure passage 310 in the longitudinal direction therein 300, the coil spring 200 having an elastic force provided on the top of the stamp 300 , The plate 210 provided along the outer circumference of the stamp 300, the outer circumference of the stamp 300 and the outer surface of the plate 210 in the valve body 100, respectively, in the longitudinal direction Guide wall 140 provided to guide the longitudinal movement of the stamp 300 to form a low pressure chamber 220 capable of accommodating fluid, and connected to a lower portion of the stamp 300 and the stamp ( The vessel in the inflow path 110 in accordance with the movement of 300 The disk 400 and the pressure control passage 430 provided in the disk 400 and the inside of the disk 400, the adjustable flow rate of the fluid flowing in the furnace 120, the low pressure passage 310 ) And the low pressure chamber 220 is in communication.

Referring to the overall structure of the pressure reducing valve according to an embodiment of the present invention, the disk 400 and the seat as the distance between the disk 400 and the seat 150 provided inside the valve body 100 is variable The fluid flow path formed between the 150, that is, the fluid movement path 130 has a structure that is opened or blocked, the opening or blocking of the fluid movement path 130 is the elastic force, the inflow path of the coil spring 200 The internal pressure of the 110 and the internal pressure of the discharge path 120 may be determined. At this time, the fluid movement path 130 is formed narrower than the inflow path 110 or the discharge path (120).

One side of the valve body 100 is provided with an inflow path 110 through which fluid is introduced into the valve body 100, and the other side is provided with a discharge path 120 through which the fluid is discharged to the outside of the valve body 100. . The inflow passage 110 and the discharge passage 120 communicate with each other when the fluid movement passage 130 is opened.

The valve body 100 of the present invention may have various sizes and shapes according to installation conditions, positions, etc., and serves as a passage through which fluid moves. In one embodiment of the invention, the fluid may be water.

The coil spring 200 is provided inside the valve body 100. The coil spring 200 is provided inside the upper portion of the valve body 100 and has an elastic force of a predetermined size. In one embodiment of the present invention, the coil spring 200 is wound spirally based on the central axis, the upper portion of the coil spring 200 is coupled to the valve body 100 by a pressure adjusting screw 201 or the like It is preferable that the elastic force of the coil spring 200 can be varied by tightening or loosening the pressure adjusting screw 201.

The plate 210 and / or the stamp 300 are provided below the coil spring 200. The plate 210 may be provided at a lower side of the coil spring 200 and an upper outer circumference of the stamp 300, and may move up and down together with the stamp 300. According to an embodiment of the present invention, the stamp 300 is provided at the lower end of the coil spring 200 while the upper portion penetrates the plate 210 in the vertical direction, and the plate 210 is the stamp 300. Have the same central axis as).

A support member 124 for supporting the lower end of the coil spring 200 may be provided between the lower end of the coil spring 200 and the upper end of the plate 210. The support member 124 is coupled to the stem 300 to transmit the elastic force by the coil spring 200 to the stem 300.

A diaphragm 122 may be provided between the support member 124 and the plate 210, and the diaphragm 122 may move up and down together with the plate 210 and the stamp 300. . The diaphragm 122 may be formed of a flexible material to form an auxiliary chamber 121 between the lower portion of the diaphragm 122 and the upper portion of the guide wall 140. The auxiliary chamber 121 communicates with the discharge path 120 to receive the fluid pressure in the discharge path 120 to press the lower surface of the diaphragm 122, thereby to press the stem 300. By moving, the opening and closing of the fluid movement path 130 may be assisted.

The guide wall 140 provided in the valve body 100 is provided to contact the outer circumference of the plate 210 and the outer circumference of the stamp 300.

That is, the guide wall 140 is provided such that the plate 210 is relatively movable along the upper portion of the guide wall 140 while its upper portion is in contact with the outer circumference of the plate 210. In one embodiment, a portion of the guide wall 140 in contact with the plate 210 is provided with a sealing (R) may be maintained even when the plate 210 is moved. In one embodiment, the seal R may be an O-ring or a rubber ring.

The lower pressure chamber 220, which is bounded by the plate 210, the guide wall 140, and the stamp 300, is formed under the plate 210, and the plate 210 forms the guide wall 140. As a result, the volume of the low pressure chamber 220 is reduced. In this case, the low pressure chamber 220 is preferably watertightness is maintained by the plate 210, the guide wall 140, the stamp 300.

The lower portion of the guide wall 140 is provided to be in contact with the outer surface of the stamp 300 so that the stamp 300 is relatively movable along the guide wall 140. In one embodiment, a portion of the guide wall 140 in contact with the stamp 300 is provided with a sealing R to maintain watertightness between the guide walls 140 even when the stamp 300 is moved. In one embodiment, the seal R may be an O-ring or a rubber ring.

Specifically, according to an embodiment of the present invention, the upper portion of the guide wall 140 is in contact with the outer circumference of the plate 210, and the lower portion is gradually reduced in the inner diameter in the lower direction, the lower end to the stamp 300 It may have a structure in contact with. That is, the upper portion of the guide wall 140 is in contact with the plate 210, the lower portion is in contact with the stamp 300, it may have a shape that the inner cross-section gradually decreases in the downward direction while bending at a specific position. However, if the relative movement of the plate 210 and the stem 300 can be guided while maintaining watertightness, the guide wall 140 may be changed in various shapes or shapes.

The stem 300 of the present invention is provided in the valve body 100 and extends in the longitudinal direction or the vertical direction to open and close the fluid movement path 130 while moving up and down relative to the guide wall 140. The flow rate of the fluid flowing from the inlet 110 to the outlet 120 is adjusted. Specifically, the stamp 300 has a rod shape extending in the vertical direction, and may move up and down by the difference between the elastic force of the coil spring 200 and the pressure applied by the fluid, which will be described later. .

A low pressure passage 310 is provided inside the stamp 300, and the low pressure passage 310 is in communication with the low pressure chamber 220. The low pressure passage 310 extends along the longitudinal direction of the stamp 300. In one embodiment, it may be provided on the central axis of the stamp 300, the low pressure passage 310 may have a diameter set to prevent the capillary phenomenon.

The disk 400 is provided below the stamp 300, and the disk 400 has a shape extending outward along the circumference of the stamp 300 and is coupled to the bottom of the stamp 300 to the stamp. Move up and down with 300.

Specifically, the seat body 150 is provided inside the valve body 100 and the upper surface and the seat of the disk 400 coupled to the lower portion of the stamp 300 as the stamp 300 moves up and down. The fluid movement path 130 formed between the disk 400 and the seat 150 is opened and closed while the distance between the 150 is farther or closer, and the degree of opening and closing is controlled. The sheet 150 is provided to be spaced apart from the central axis of the stamp 300 by a predetermined distance along the outer circumference of the stamp 300, the upper surface of the disk 400 and the lower end of the sheet 150 stamp It may have a structure that is closer or farther from each other by the vertical movement of the (300). That is, in the state where the seat 150 and the upper surface of the disk 400 is in contact with each other, the fluid movement path 130 is in a closed state, and the stem 300 and the disk 400 move downward. Accordingly, the gap between the seat 150 and the disk 400 increases, so that the fluid passage 130 is gradually opened.

In one embodiment, a portion of the upper surface of the disk 400 in contact with the sheet 150 may include a packing 421 formed of a material such as rubber and having watertightness. The packing 421 is preferably detachable from the disk 400.

The seat 150 may have a variety of shapes within the scope of the present invention for communicating or blocking the inlet passage 110 and the discharge passage 120 of the valve body 100.

The disk 400 is provided on the upper side and the disk guide 410 formed to gradually widen the cross-sectional area in the downward direction, the disk guide disk plate provided in the lower portion of the disk guide 410 is in contact with the sheet 150 420 and the pressure control passage 430 formed to communicate with the low pressure passage 310.

The disc guide 410 may have a shape in which the cross-sectional area gradually widens from the top to the bottom, and the disc plate 420 is provided at the bottom of the disc guide 410 to become close to the sheet 150 or Adjust the flow rate flowing away to the discharge path (120). The pressure regulating passage 430 is formed to penetrate the inside of the disk 400, and the pressure regulating passage 430, the low pressure passage 310, and the low pressure chamber 220 may communicate with each other. In one embodiment, the disk guide 410 may be formed of a metallic material.

The pressure regulating passage 430 may be a plurality of radially extending from the center of the disk guide 410 or the low pressure passage 310, it may be formed in a horizontal direction. In one embodiment, the pressure control passage 430 is composed of four flow paths extending from the center of the disk guide 410 may extend in a horizontal direction and form a right angle with each other.

In addition, one end of the pressure control passage 430 may be provided so as to communicate adjacent to the fluid movement path (130). Since one end of the pressure control passage 430 is adjacent to the fluid movement passage 130, the fluid movement passage may be formed inside the low pressure passage 310 and the low pressure chamber 220 communicating with the pressure control passage 430. A fluid pressure equal to the fluid pressure acting at 130 is applied.

In an embodiment of the present invention, the low pressure passage 310 has a first passage 311 communicating with the low pressure chamber 220 at an upper portion thereof, and a second passage provided to communicate with the pressure control passage 430 at a lower portion thereof. 312 and a third passage 313 for communicating the first passage 311 and the second passage 312. In one embodiment, the first passage 311 which is in direct communication with the low pressure chamber 220 may extend in a horizontal direction, and the second passage 312 which is in direct communication with the pressure regulating passage 430. May extend in the horizontal direction. The first passage 311 or the second passage 312 may be formed in a plurality of radial from the central axis of the stamp (300). The third passage 313 may extend in the longitudinal direction of the stamp 300 while communicating the first passage 311 and the second passage 312.

In one embodiment, the stem 300 is coupled to the plate 210 and the first shaft member 320, the first shaft member 320 and the disk provided with the first passage 311 therein. It may include a second shaft member 330 coupled to 400 and provided with the second passage 312 therein. Specifically, the first shaft member 320 has an upper outer side is coupled to the plate 210, the lower portion and the second shaft member 330 of the first shaft member 320 is part or all of the guide Abutment is relatively movable along the lower portion of the wall 140. The disk 400 is coupled to the lower portion of the second shaft member 330. As described above, the stamp 300 composed of the first shaft member 320 and the second shaft member 330, which is composed of a plurality of components, which can be combined and separated, forms a low pressure flow path 310 provided therein. It increases the ease of manufacture of each part and maintenance of the finished product.

In one embodiment of the present invention may be provided along the outer periphery of the guide wall 140 and may further include a filtration unit 600 for filtering the fluid flowing from the inflow path 110 to the discharge path 120. .

The filtration unit 600 filters out foreign substances or contaminants contained in the fluid supplied from the inflow path 110. The filtering part 600 may be provided at the lower outer side of the guide wall 140, and more specifically, the guide wall 140 and the stamp 300 between the guide wall 140 and the disk 400. It is preferable to be provided in the outer side of this contacting part. The filtration unit 600 may have a porous shape and may be formed of various materials.

Hereinafter, the operation of the flow control pressure reducing valve according to an embodiment of the present invention.

4 to 6 are enlarged cross-sectional views of a portion of a low pressure chamber according to an embodiment of the present invention.

4 illustrates a state in which the fluid movement path 130 is closed, FIG. 5 illustrates a state in which the fluid movement path 130 is partially opened, and FIG. 6 illustrates a state in which the fluid movement path 130 is fully opened.

1 and 4 to 6, the flow control pressure reducing valve according to the present invention is the fluid flow path while the interval between the seat 150 and the disk 400 is changed in accordance with the movement of the stamp 300 130 is opened and closed and the amount of fluid moving from the inlet 110 to the outlet 120 is adjusted.

1 and 4 to 6, the pressure of the fluid on the inlet path 110 is P1, the pressure of the fluid on the outlet path is P2, the pressure of the low pressure chamber 220 is P3, and the upper surface of the disk 400. The pressure of the fluid in the diaphragm 122 in the auxiliary chamber 121 is A3, and the lower area of the plate 210 forming the low pressure chamber 220 is A2, the area of the lower surface of the disk 400 is A2. An elastic force exerted by the A4 and the coil spring 200 in the downward direction is described as C for the acting area. Since the auxiliary chamber 121 communicates with the discharge path 120, the internal pressure applied to the diaphragm 122 is equal to the pressure P2 of the discharge path side fluid.

First, when the disk 400 and the seat 150 are in contact with each other and the fluid movement path 130 is closed and no fluid flows from the inflow path 110 to the discharge path 120 (FIG. 4), the stamp If the direction of the force (the direction of the force to open the valve) for moving the 300 and the disk 400 downward is (+), the sum of the total external forces acting on the stamp 300 and the disk 400 is P1. P1 × A1-P2 × A2-P3 × A3-P2 × A4 + C, P1 × A1-P2 × A2-P3 × A3-P2 × A4 + C = 0 Becomes

In addition, when the fluid movement path 130 is closed (FIG. 4), the fluid on the inflow path 110 existing above the disk 400 is the pressure control passage 430, the low pressure passage 310, and the low pressure. Moving inside the chamber 220, the pressure P3 of the low pressure chamber 220 is equal to the pressure P1 of the fluid in the inflow path 110.

For convenience of calculation, the area A1 of the upper surface of the disk 400 and the lower area A3 of the plate 210 are designed to be the same so that the fluid path 130 is closed (FIG. 4). Since the values of the pressure P3 of the low pressure chamber 220 and the pressure P1 of the inlet-side fluid are the same, the terms P1 × A1-P3 × A3 are canceled and -P2 × A2-P2 × A4 + C = 0. C = P2 x A2 + P2 x A4. If P2 becomes lower than the initial P2 value of the equilibrium state, the stamp 300 and the disk 400 move downward and the fluid movement path 130 starts to open by the elastic force of the coil spring 200.

When a part of the fluid passageway 130 is opened (FIG. 5), the sum of the forces for opening the fluid passageway 130 (the force for moving the stamp 300 and the disc 400 downward) is P1 ×. If A1-P2 x A2-P2 x A4-P3 x A3 + C, and the area of A1 and A3 is the same, the sum of the forces for opening the fluid passage 130 is A1 (P1-P3)-P2 x A2 -P2 x A4 + C At this time, since the fluid movement path 130 is narrower than the inflow path 110, the velocity of the fluid flowing into the inflow path 110 becomes faster in the fluid movement path 130 (Bernui principle), and by the Venturi effect. The fluid pressure in the fluid movement path 130 is lower than the fluid pressure P1 in the inflow path 110. The pressure regulating passage 430 adjacent to the fluid movement passage 130, the low pressure passage 310 communicating with the pressure regulating passage 430, and the low pressure chamber 220 communicating with the low pressure passage 310 are the fluid movement passage ( The same pressure P3 as 130 is applied, and P3 is lower than the fluid pressure P1 in the inflow path 110 by the above-described Venturi effect. Compared to the case in which the fluid movement path 130 is closed, the force to open the fluid movement path 130 when the fluid movement path 130 is partially opened is added by A1 (P1-P3), and A1 ( P1-P3) is greater than 0 since P1> P3. Accordingly, in the present invention, when the pressure P2 inside the discharge path 120 is reduced, the force for opening the fluid movement path 130 is increased by A1 (P1-P3). Therefore, when there is no venturi effect, the force to open the fluid passage 130, which is the force to open the fluid passage 130, is added to A2 (P1-P3) by-P2 × A2-P2 × A4 + C. The stem 300 and the disk 400 move more than they would be without, resulting in a wider fluid flow path 130 and consequently more flow rate from the inflow path 110 to the discharge path 120.

When the fluid path 130 is completely open (FIG. 6), the sum of the forces for opening the fluid path 130 is P1 × A1-P2 × A2-P3 × A3-P2 × A4 + C, and A1 and Assuming that A3 is the same, the sum of the forces for opening the fluid passage 130 is A1 (P1-P3)-P2 x A2-P2 x A4 + C.

Since the fluid path 130 is fully open, the velocity of the fluid passing through the fluid path 130 may be somewhat reduced than when the fluid path 130 is only partially opened, but the fluid path 130 still flows in. If it is narrower than the furnace 110, the pressure of P3 is still smaller than that of P1, so that A1 (P1-P3) still has a positive value, so even in this case, the fluid flow path 130 is additionally compared to the case where there is no venturi effect. It acts as an opening force.

Flow control pressure reducing valve of the present invention having the structure as described above, even if the fluid consumption in the place of use, by additionally opening the fluid flow path 130 through the venturi effect to mitigate the pressure drop in the discharge path and the required water pressure and stably Flow rate can be supplied.

9 is an image showing the pressure distribution of the flow control pressure reducing valve using a venturi effect according to an embodiment of the present invention, Figure 10 is a speed distribution of the flow control pressure reducing valve using a venturi effect according to an embodiment of the present invention Image shown. 9 and 10 (a) shows the pressure and speed distribution of the conventional pressure reducing valve without the low pressure chamber, the low pressure passage and the pressure control passage, Figures 9 and 10 (b) shows the pressure and speed of the pressure reducing valve according to the present invention Indicates a distribution. Reference numerals used in FIGS. 9 and 10 (b) are the same as those used in FIGS. 1 to 6, and repeated descriptions thereof will be omitted.

9 and 10 (b), the pressure reducing valve according to the present invention has a relatively high velocity of the fluid passing through the fluid passage 130 when the fluid passage 130 is opened, so the Venturi effect By the internal pressure (P3) of the low pressure chamber 220 in communication with the fluid movement path 130 is lower than the internal pressure (P1) of the inflow path 110, as described above than there is no venturi effect Since the distance between the disk 400 and the seat 150 is further increased and the fluid movement path 130 is opened more, a smooth flow rate can be supplied in response to the flow rate consumption at the place of use.

7 and 8 are state diagrams illustrating the bypass passage 530 according to an embodiment of the present invention. 7 (a) shows the appearance of the bypass passage 530 is open, Figure 7 (b) shows a cross-sectional view of the bypass passage 530 is open, Figure 8 (a) is a bypass passage 8 (b) shows a cross-sectional view of the bypass channel 530 in a blocked state.

The pressure reducing valve according to the exemplary embodiment of the present invention includes a first three-way valve 510, a second three-way valve 520, and a bypass passage 530.

Specifically, referring to FIGS. 7 and 8, the first three-way valve 510 installed in the inflow path 110 and adjusting the moving direction of the fluid, the agent installed in the discharge path 120 and adjusting the moving direction of the fluid The two-way valve 520 and the first three-way valve 510 and the second three-way valve 520 is connected to each other is composed of a bypass passage 530. The first three-way valve 510 serves to adjust the moving direction of the fluid, and determines the direction of the fluid moving from the inflow path 110 to the fluid movement path 130 or the bypass flow path 530. The second three-way valve 520 determines the direction of the fluid moving from the fluid passage 130 or the bypass passage 530 to the discharge passage 120.

The first three-way valve 510 and the second three-way valve 520 are rotatably coupled to each of the inlet passage 110 and the outlet passage 120 of the valve body 100. That is, the first three-way valve 510 blocks the bypass passage 530 by rotation to move the fluid from the inflow passage 110 to the fluid movement passage 130, or the bypass passage 530. Open) to block the flow of fluid flowing from the inlet 110 to the fluid passage 130 and to move the fluid from the inlet 110 to the bypass passage 530. The same structure may be applied to the second three-way valve 520.

The first three-way valve 510 and the second three-way valve 520 is rotatably coupled to the valve body 100, the valve body 100, the first three-way valve 510 and the second three-way valve ( The opening and closing cover 540 may be provided to prevent the separation of the 520. In addition, a handle 550 protruding to the outside of the valve body 100 may be connected to the first three-way valve 510 and the second three-way valve 520, respectively. The handle 550 facilitates rotation of the first three-way valve 510 and the second three-way valve 520. For example, when the knob 550 is rotated 90 °, the first three-way valve 510 or the second three-way valve 520 may be rotated at the same angle.

Specifically, as shown in FIG. 7, the bypass passage 530 may be opened by rotating the handle 550 respectively connected to the first three-way valve 510 and the second three-way valve 520. In this case, the fluid of the inflow passage 110 moves to the discharge passage 120 via the bypass passage 530. In addition, as shown in FIG. 8, the handle 550 may be rotated to block the bypass passage 530 and move the fluid of the inflow passage 110 in the direction of the fluid movement passage 130. . The valve body 100 or the opening and closing cover 540 is preferably further provided with a pressure gauge to facilitate the measurement of the internal pressure of the pipe and / or valve.

In one embodiment of the present invention, the bypass passage 530 may be provided with a throttle valve 531 that can adjust the flow rate of the fluid flowing through the bypass passage 530. The throttle valve 531 is installed inside the bypass passage 530 and may have various configurations and structures.

For example, a fastening member is fastened to a lower portion of the bypass flow passage 530, and the throttle valve 531 is coupled to a rotating shaft of the fastening member to rotate the amount of fluid passing through the bypass flow passage 530. At the same time to control the pressure, by generating a friction with the fluid passing through the bypass passage 530 may serve to lower the pressure of the fluid.

In this case, the throttle valve 531 and the fastening member 532 may be separated from the valve body 100 for maintenance of the valve, and all the fluid located in the valve body 100 may be discharged to the outside.

In the present invention having the structure and configuration as described above is easy to repair when a problem occurs in the mechanism of the pressure reducing valve to control the flow rate by adjusting the opening degree of the fluid movement path 130, the use of excessive flow rate in the place of use Even if it occurs, there is an advantage that can continuously supply a sufficient flow rate by moving the fluid directly from the inlet 110 to the outlet 120 through the bypass passage 530. In addition, through the throttle valve 531 provided in the bypass passage 530, it is possible to easily adjust the flow rate of the fluid passing through the bypass passage 530, and at the same time, the fastening member can be detached from the valve body 100. Mounted so that the fluid present in the interior of the valve body 100 can be easily discharged.

100: valve body 110: inflow path
120: discharge path 121: auxiliary chamber
122: diaphragm 130: fluid movement path
140: guide wall 150: sheet
200: coil spring 210: plate
220: low pressure chamber 300: stamp
310: low pressure passage 311: first passage
312: second passage 313: third passage
320: first axis
330: second axis 400: disk
410: disk guide 420: disk plate
421: Packing
430: pressure regulating passage 510: first three-way valve
520: the second three-way valve 530: bypass flow path
531: throttle valve 532: fastening member
540: opening and closing cover 600: filtration unit
R: Shilling

Claims (6)

A valve body having an inlet and an outlet;
A stamp provided in the valve body and extending in a longitudinal direction and having a low pressure passage in the length direction therein;
A coil spring provided above the stamp and having an elastic force;
A plate provided along an outer circumference of the stamp;
A guide provided in the valve body in contact with an outer circumference of the stamp and an outer circumference of the plate, respectively, extending in the longitudinal direction to guide the longitudinal movement of the stamp and to form a low pressure chamber in which the fluid can be received; wall;
A disk connected to the bottom of the stamp and adjustable in flow amount from the inflow passage to the discharge passage in accordance with the movement of the stamp;
A sheet provided on the disk and forming a fluid movement path while varying a distance from the disk according to the movement of the stamp;
And a pressure regulating passage provided inside the disc and communicating with the low pressure passage and having one end adjacent to the fluid movement passage.
The low pressure passage and the low pressure chamber is in communication,
When the fluid flows from the inflow passage to the discharge passage, the internal pressure P ₃ of the low pressure chamber is lower than the internal pressure P ₁ of the inflow passage,
The internal pressure (P ₃ ) of the low pressure chamber is reduced as the velocity of the fluid passing through the fluid passage increases, the flow control pressure reducing valve using a venturi effect.
The method of claim 1,
The low pressure flow path,
A first passage communicating with the low pressure chamber at an upper portion thereof;
A second passage communicating with the pressure control passage at a lower portion and provided radially; And
And a third passage provided in the length direction while connecting the first passage and the second passage to each other.
The stamp is,
A first shaft member coupled to the plate and provided with the first passage; And
And a second shaft member connected to a lower portion of the first shaft member and coupled to the disk and provided with the second passage.
The pressure regulating flow path,
Flow control pressure reducing valve using a venturi effect, characterized in that extending from the low pressure flow path to the fluid movement path.
The method of claim 2,
The pressure regulating flow passage is a plurality, the plurality of pressure regulating flow passage is provided with a flow control pressure reducing valve using a venturi effect, characterized in that provided radially around the low pressure passage.
The method of claim 1,
A first three-way valve installed in the inflow path and adjusting a moving direction of the fluid;
A second three-way valve installed in the discharge path and controlling a moving direction of the fluid; And
And a bypass passage for connecting the first three-way valve and the second three-way valve to each other. 2.
The method of claim 4, wherein
And a throttle valve provided in the bypass flow path and configured to adjust a flow rate of the fluid flowing in the bypass flow path.
The method of claim 1,
And a filtration unit provided along the outer circumference of the guide wall and filtering the fluid flowing from the inflow passage to the discharge passage.

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