KR102199188B1 - Pressure reducing control valve and method - Google Patents

Abstract

An embodiment of the present invention provides a pressure reducing control valve capable of increasing depressurization performance while preventing cavitation, flashing, etc. by forming a plurality of channels therein and having the channels have a shape suitable for decompression. . A pressure reducing control valve according to an embodiment of the present invention includes: a valve body having an inlet through which fluid is introduced at one side, an outlet through which fluid is discharged at the other side, and having a flow path connecting the inlet and the outlet; A valve trim formed in the flow path of the valve body, opening and closing the flow path of the valve while rising up and down, and having a center flow path, which is a flow path formed along a central axis therein; A channel forming unit coupled to the upper and lower portions of the valve trim and formed by stacking a plurality of them, a flow hole, which is a hole through which fluid flows, at a center portion, and a channel through which a fluid flows in a direction from the flow hole to the outside; And a drive shaft portion which is formed by being inserted into the central flow path and coupled with the valve trim to vertically lift the valve trim.

Description

Pressure reducing control valve and method {PRESSURE REDUCING CONTROL VALVE AND METHOD}

The present invention relates to a pressure reducing control valve and method, and more particularly, by forming a plurality of channels inside and having a shape suitable for pressure reduction, cavitation, flashing, etc. are prevented and the pressure reducing performance is improved. It relates to a pressure reducing control valve that can be increased.

In general, a valve regulates the flow rate, pressure, and speed of the fluid, plays a role of changing the direction of the fluid, conveying and shutting off the fluid, and has a valve body with an inlet and an outlet formed inside, and inside the valve body. It is composed of a valve trim that opens and closes the flow path so that the flow of fluid passing through the flow path is controlled by the valve trim.

When trying to control the flow rate by adjusting the pressure difference, the excessive flow control increases the pressure difference and causes instability in the fluid flow in the valve.The most frequent damage structure is the amount of pressure loss in the valve during pressure control. As a result, it is cavitation that occurs when the pressure at the valve throttling part falls below the saturated vapor pressure of the fluid and then recovers at the rear end of the valve.

In addition, the control valve of the heater drainage system may operate the valve in a bubble state without recovering the fluid pressure at the rear end of the valve by discharging the fluid to a device with a relative vacuum, which is expressed as flashing.

These cavitation and flashing phenomena cause a choke phenomenon in which fluid does not flow instantaneously even when the valve is open and intermittently generates large vibration or noise, and cavitation in the control valve wears out the valve trim and causes a large noise. there is a problem.

In Korean Patent Registration No. 10-1351364 (name of the invention: flow control valve and assembly method thereof), a pair of ports 12 and 14 are displaced by displacing a rod 54 having a control member 88 at its tip in the axial direction. A flow control valve (10) capable of controlling the flow rate of fluid flowing between the ports (12, 14) and a pair of fluid passages (32, 34) through which the fluid supplied from the ports (12, 14) flows. A main body 16 having ); A sub-body 50 disposed inside the main body 16 and screwed in a manner in which the rod 54 advances and retreats; And a hole connected to the end of the sub-body 50 and communicating between the seat portion 78 for seating the control member 88 and the one fluid passage 32 and the other fluid passage 34 ( A tubular sheet member 52 having 76) is provided, and a positioning mechanism is composed of the sub-body 50 and the sheet member 52, and the positioning mechanism is the sub-body 50 and the sheet A flow control valve is disclosed, wherein the member 52 can be adjusted and disposed, and the sub-body 50 and the seat member 52 are disposed on the same axis.

Korean Patent Registration No. 10-1351364

An object of the present invention for solving the above problems is to prevent cavitation, flashing, and the like that may occur in the pressure reducing control valve.

In addition, an object of the present invention is to increase the decompression efficiency when depressurizing is performed in the decompression control valve.

The technical problem to be achieved by the present invention is not limited to the technical problems mentioned above, and other technical problems that are not mentioned can be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. There will be.

The configuration of the present invention for achieving the above object is a valve body having an inlet through which fluid is introduced on one side and an outlet through which fluid is discharged on the other side, and having a flow path connecting the inlet and the outlet; A valve trim that is formed in the flow path of the valve body, opens and closes the flow path of the valve while rising up and down, and has a center flow path that is a flow path formed along a central axis therein; A channel forming unit coupled to an upper portion of the valve trim and formed by stacking a plurality of them, a flow hole, which is a hole through which fluid flows, at a center portion, and a channel through which the fluid flows in an outward direction from the flow hole; And a drive shaft part which is formed by being inserted into the central flow path and is coupled to the valve trim to vertically lift the valve trim.

In an embodiment of the present invention, the cross-sectional shape of the channel may be hexagonal.

In an embodiment of the present invention, the channel may include a first channel inlet and outlet connected to the flow hole, and a second channel inlet and outlet connected to a flow path of the valve body.

In an embodiment of the present invention, each of the second channel inlets and outlets formed in the channels of each of the plurality of channel forming units to be stacked may be helically arranged along the circumferential direction of the side of the valve trim.

In an embodiment of the present invention, the channel forming part includes an upper channel plate forming an upper portion of the channel forming part and having a groove for forming the channel, and a shape corresponding to the upper channel plate forming a lower part of the channel forming part. As a result, a lower channel plate having a groove for forming the channel may be provided.

In an embodiment of the present invention, the channel may have a plurality of repeated bending portions.

In an embodiment of the present invention, the valve body includes a first body flow path formed from the inlet to a lower portion of the valve trim, and a second body flow path connected to the first body flow path and formed from the top of the valve trim to the outlet. A body flow path, and a connection hole connecting the first body flow path and the second body flow path, may be provided.

In an embodiment of the present invention, the valve trim may be formed through the connection hole.

In an embodiment of the present invention, the central flow path and the flow hole may be connected to each other.

In an embodiment of the present invention, the central axis of the central flow path and the central axis of the flow hole may be formed equally.

In an embodiment of the present invention, a plurality of channel forming units may be stacked on the valve trim to form an upper channel module.

The configuration of the present invention for achieving the above object includes: a first step of flowing a fluid into the inlet and flowing to a lower portion of the valve trim; A second step of flowing a fluid into an inlet of a central passage formed under the valve trim and flowing to an upper portion of the valve trim along the central passage; A third step in which the fluid flows into the flow hole of the channel forming part formed on the upper part of the valve trim, passes through the channel, is depressurized, and discharges to the outlet; And a fourth step of controlling the flow rate of the fluid passing through the valve trim and the channel forming part by changing the position of the valve trim by moving up and down.

The effect of the present invention according to the configuration as described above is that by forming a plurality of channels in the pressure reducing control valve and having the channels have a shape suitable for depressurization, phenomena such as cavitation and flashing are prevented and the decompression performance can be increased. There is.

In addition, the effect of the present invention is that the number of channels through which the fluid in the channel flows is changed in the valve trim according to the position change according to the vertical elevation of the valve trim, so that precise control over the pressure reduction is possible.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a cross-sectional view of a pressure reducing control valve according to an embodiment of the present invention.
2 is an enlarged view of an upper side of a valve trim according to an embodiment of the present invention.
3 is a perspective view of a lower channel plate and a cross-sectional view of the channel according to an embodiment of the present invention.
4 is an analysis model for analyzing the performance of a channel forming unit according to an embodiment of the present invention.
5 is an image of flow velocity performance analysis of a channel forming unit according to an embodiment of the present invention.
6 is a graph illustrating a flow rate performance analysis graph of a channel forming unit according to an embodiment of the present invention.
7 is an image of hydraulic performance analysis of a channel forming unit according to an embodiment of the present invention.
8 is a graph showing hydraulic performance analysis of a channel forming unit according to an embodiment of the present invention.
9 is an image of turbulent kinetic energy of a fluid in a channel forming unit according to an embodiment of the present invention.
10 is a graph of turbulent kinetic energy of a fluid in a channel forming unit according to an embodiment of the present invention.
11 is an image of turbulence dissipation of fluid in a channel forming unit according to an exemplary embodiment of the present invention.
12 is a graph of turbulence dissipation of a fluid in a channel forming part according to an exemplary embodiment of the present invention.
13 is an image of a turbulent vortex of a fluid in a channel forming part according to an embodiment of the present invention.
14 is an image of shear stress of a channel of a channel forming unit according to an embodiment of the present invention.
15 and 16 are images of fluid mass flow through a channel and a flow hole of a channel forming unit according to an embodiment of the present invention, respectively.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be implemented in a number of different forms, and therefore is not limited to the exemplary embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part is said to be "connected (connected, contacted, bonded)" with another part, it is not only "directly connected", but also "indirectly connected" with another member in the middle. "Including the case. In addition, when a part "includes" a certain component, it means that other components may be further provided, rather than excluding other components unless specifically stated to the contrary.

The terms used in this specification are used only to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a pressure reducing control valve according to an embodiment of the present invention, FIG. 2 is an enlarged view of an upper side of a valve trim 200 according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. A perspective view of the lower channel plate 130 and a cross-sectional view of the channel 110 according to the embodiment. Here, (a) of FIG. 3 is a perspective view of the lower channel plate 130, and (b) of FIG. 3 is a cross-sectional view of the channel 110 having a hexagonal cross section.

1 and 2, the pressure-reducing control valve of the present invention has an inlet 310 of the valve body through which fluid flows into one side, and an outlet 320 of the valve body through which fluid is discharged on the other side. , A valve body 300 having a flow path connecting the inlet and the outlet 320 of the valve body; A valve trim 200 formed in the flow path of the valve body 300, opening and closing the flow path of the valve while rising up and down, and having a center flow path 210, which is a flow path formed along a central axis therein; A flow hole 120, which is a hole through which fluid flows, is formed at the center portion, which is coupled to the upper portion of the valve trim 200 and is formed by stacking a plurality of pieces, and the fluid flows along the direction from the flow hole 120 to the outside. A channel forming unit 100 in which the channel 110 is formed; And a drive shaft part 400 which is formed by being inserted into the central flow path 210 and is coupled with the valve trim 200 to lift the valve trim 200 up and down.

The valve body 300 is connected to the first body flow path 331 and the first body flow path 331 formed from the inlet 310 of the valve body to the lower portion of the valve trim 200 and is connected to the valve trim 200. A second body flow path 332 formed from the top to the outlet 320 of the valve body, and a connection hole 333 connecting the first body flow path 331 and the second body flow path 332, may be provided. . As shown in Fig. 1, one end of the first body flow path 331 in which the inlet 310 of the valve body is formed is formed higher with respect to the ground than the other end of the first body flow path 331, so that the inlet 310 of the valve body The fluid introduced into the valve flows toward the bottom of the valve trim 200, and the other end of the second body flow path 332 in which the outlet 320 of the valve body is formed is more with respect to the ground than the one end of the second body flow path 332 The fluid that is formed low and flows along the first body flow path 331 and then passes through from the bottom of the valve trim 200 to the top flows from the top of the valve trim 200 toward the outlet 320 of the valve body. I can.

The valve trim 200 may be formed through the connection hole 333. In addition, the upper side circumferential length of the valve trim 200 is formed longer than the lower side circumferential length of the valve trim 200, and in a cross-sectional area perpendicular to the central axis of the valve trim 200, the Since the upper cross-sectional area is larger than the lower cross-sectional area of the valve trim 200, the side surface of the valve trim 200 may be formed in multiple stages. In addition, when the lower portion of the valve trim 200 passes through the connection hole 333 and is formed to be in contact with the bottom surface of the valve body 300, and the lower portion of the valve trim 200 is located at the lowest point, the valve The upper portion of the trim 200 may be formed so as to be caught in a portion where the connection hole 333 is formed inside the valve body 300. In this way, since the side of the valve trim 200 is formed in multiple stages, the valve body 300 is located at the lowest point of the valve trim 200 and the hydraulic pressure of the fluid passing through the valve trim 200 is the largest. In the inside of the valve trim 200 can be fixed and supported easily and firmly.

The channel 110 may include a first channel inlet 121 connected to the flow hole 120 and a second channel inlet 122 connected to a flow path of the valve body 300. The fluid introduced into the flow hole 120 may flow into the first channel inlet and outlet 121 from the flow hole 120, pass through the channel 110 and then be discharged through the second channel inlet and outlet 122. In addition, the fluid flowing from the outside of the valve trim 200 to the second channel inlet and outlet 122 may pass through the channel 110 and then be discharged through the first channel inlet and outlet 121 to flow into the flow hole 120. .

The central flow path 210 and the flow hole 120 may be connected to each other. Here, the central axis of the central flow path 210 and the central axis of the flow hole 120 may be formed identically. And, the drive shaft part 400 is formed by combining with the upper end of the valve trim 200, and formed to reduce the volume of the central passage 210 by the inlet portion of the drive shaft part 400 that is introduced into the central passage 210 Can be. That is, when the fluid passes through the inside of the valve trim 200, the inner surface of the valve trim 200 forming the central flow path 210 and not the entire center flow path 210 and the inlet portion of the drive shaft 400 The fluid can flow through the space between the sides. The drive shaft part 400 may have a bar shape having a circular cross section, but is not limited thereto.

The channel forming unit 100 forms an upper portion of the channel forming unit 100 and forms an upper channel plate having a groove for forming the channel 110, and a lower portion of the channel forming unit 100 and corresponds to the upper channel plate. A lower channel plate 130 having a groove for forming the channel 110 may be provided. The upper channel plate and the lower channel plate 130 are combined to form one disc-shaped channel 110 shape, and the groove of the upper channel plate and the groove of the lower channel plate 130 are combined to form the channel 110 can do. Accordingly, by manufacturing the channel forming unit 100 using the upper channel plate and the lower channel plate 130 having a simple structure, the process can be simplified and manufacturing cost can be reduced.

Further, a plurality of channel forming units 100 may be stacked on the valve trim 200 to form an upper channel module. The pressure reducing control valve of the present invention allows the hydraulic pressure of the fluid to be reduced while the fluid flowing into the inlet 310 of the valve body passes through the plurality of channel forming units 100 coupled to the valve trim 200, as described above. Since the hydraulic pressure of the fluid decreases while passing through the upper channel module, the decompression efficiency can be increased, and the fluid in the channel 110 flows according to the position change according to the vertical elevation of the valve trim 200. Since the number is changed, precise control for the decompression may be possible.

Specifically, when the valve trim 200 is raised, some of the channel forming units 100 provided in the upper channel module may be closed by the side inside the valve body 300. Accordingly, when the valve trim 200 rises, the amount of fluid passing through the valve trim 200 and the channel forming unit 100 decreases, so that a pressure reduction ratio of the fluid passing through the valve body 300 may increase. In addition, when the valve trim 200 is lowered, a ratio of the channel forming units 100 to be opened among the channel forming units 100 provided in the upper channel module may increase. Accordingly, when the valve trim 200 is lowered, the amount of fluid passing through the valve trim 200 and the channel forming unit 100 increases, so that a pressure reduction ratio of the fluid passing through the valve body 300 may be lowered.

The channel 110 may be formed to be radially arranged around the flow hole 120. And, each of the channels 110 may be arranged at a uniform interval. Accordingly, since the fluid passing through each channel 110 can flow at a constant hydraulic pressure, generation of vortex or pulsation is prevented in advance, so that the depressurization performance of the pressure reducing control valve of the present invention can be maintained constant.

As shown in (b) of Figure 3, the cross-sectional shape of the channel 110 may be a hexagon. In the exemplary embodiment of the present invention, it is described that the cross-sectional shape of the channel 110 is hexagonal, but the cross-sectional shape of the channel 110 is not necessarily limited thereto, and the cross-sectional shape of the channel 110 may be formed in a circular shape, an elliptical shape, or another polygon. However, when the cross-sectional shape of the channel 110 is formed in a hexagonal shape, the efficiency of the fluid flowing through the channel 110 may be increased. This will be described in detail in the performance analysis of the channel forming unit 100 below.

The channel 110 may have a plurality of repeated bending portions 111. In addition, the size of each portion forming the channel 110 may increase from the flow hole 120 to the outside of the channel 110, and accordingly, from the flow hole 120 to the outside of the channel 110 The size of the bent portion 111 may increase. By such a bent portion 111, the flow length of the fluid in the channel 110 is increased and the hydraulic direction of the fluid is changed a plurality of times, so that the efficiency of reducing the hydraulic pressure of the fluid may be increased.

In addition, one channel 110 and the other channel 110 may be formed in a pair by forming a shape corresponding to each other and formed adjacent to each other. Accordingly, the number of channels 110 in one channel forming unit 100 can be maximized.

Each of the second channel inlet and outlet 122 formed in each channel 110 of the plurality of channel forming units 100 to be stacked may be helically arranged along the circumferential direction of the side of the valve trim 200. And, corresponding to this, the first channel 110 inlet and outlet may be helically arranged along the circumferential direction of the side of the central flow path 210 of the valve trim 200. In addition, the arrangement of the channel forming units 100 as described above may be formed in the upper channel module. In addition, as shown in FIG. 2, an upper wall 220 may be formed on the valve trim 200 in a shape surrounding the upper channel module and having a plurality of holes.

The hole 221 of the upper wall is formed in a position corresponding to the second channel inlet and outlet 122 of the channel forming unit 100 provided in the upper channel module, and is thus helically arranged along the side circumference direction of the valve trim 200 Can be.

As described above, each second channel inlet and outlet 122 are helically arranged in the upper channel module, so that the fluid discharged from the second channel inlet and outlet 122 swings and flows inside the valve body 300 to facilitate the second body flow path ( After the flow is introduced into 332 ), it may be discharged to the outlet 320 of the valve body of the valve body 300. Accordingly, the flow efficiency of the fluid flowing in the pressure reducing control valve of the present invention can be increased.

Hereinafter, a method for controlling a pressure reduction using a pressure reducing control valve of the present invention will be described.

In the first step, the fluid flows into the inlet 310 of the valve body and flows under the valve trim 200.

In the second step, it is introduced into the inlet 211 of the central passage formed under the valve trim 200 and may flow to the upper portion of the valve trim 200 along the central passage 210.

In the third step, the fluid flows into the flow hole 120 of the channel forming part 100 formed on the upper part of the valve trim 200, passes through the channel 110, is depressurized, and discharges to the outlet 320 of the valve body. Can be.

In the fourth step, the valve trim 200 moves up and down to change the position, thereby controlling the flow rate of the fluid passing through the valve trim 200 and the channel forming unit 100.

Hereinafter, a performance analysis of the channel forming unit 100 will be described.

4 is a shape of an analysis model for performance analysis of the channel forming unit 100 according to an embodiment of the present invention. In order to grasp the characteristics of the fluid passing through the channel forming unit 100, after forming the shape of the channel forming unit 100, a flowing unit 500 having a shape surrounding the channel forming unit 100 may be formed. Accordingly, it may be set that the fluid flowing into the flow hole 120 passes through the channel 110 and then flows inside the flow unit 500 and is discharged through the outlet 510 of the flow unit. The finite element method (using ANSYS program) analysis was performed using the structural shape of the analysis model.

5 is an image of a flow rate performance analysis of the channel forming unit 100 according to an embodiment of the present invention, and FIG. 6 is a flow rate performance analysis graph of the channel forming unit 100 according to an embodiment of the present invention. Here, (a) of FIG. 5 is an image of an analysis model (hereinafter referred to as'hexagonal channel analysis model') including a channel forming unit 100 in which the cross-sectional shape of the channel 110 is hexagonal. (b) is an image of an analysis model (hereinafter referred to as a'square channel analysis model') including a channel forming unit 100 in which the cross-sectional shape of the channel 110 is square. And, in FIG. 6, a Honeycomb graph (a graph) is a graph for an analysis model including a channel forming unit 100 having a hexagonal cross-sectional shape of the channel 110, and a square graph (b graph) is a channel 110 It is a graph of an analysis model including a channel forming unit 100 having a quadrangular cross-sectional shape.

5 and 6, the maximum flow velocity of the channel 110 of the square channel analysis model is faster than the channel 110 of the hexagonal channel analysis model. (The final discharge flow rate is the channel 110 of the hexagonal channel analysis model. The flow rate of the fluid passing through was reduced by 47% compared to the flow rate of the fluid passing through the channel 110 of the rectangular device)

However, in the location and time of the decrease in flow rate, the location and time of the decrease in the flow rate of the fluid passing through the channel 110 of the hexagonal channel analysis model is the location and time of the decrease in the flow rate of the fluid passing through the channel 110 of the rectangular channel analysis model. Since it is advanced, it can be confirmed that the fluid passing through the channel 110 having a hexagonal cross-sectional shape has less influence on the substrate at the rear end. That is, when the cross-sectional shape of the channel 110 of the channel forming unit 100 is formed in a hexagonal shape, the fluid flowing through the channel 110 may flow relatively stably.

7 is an image of hydraulic performance analysis of the channel forming unit 100 according to an embodiment of the present invention, and FIG. 8 is a graph of hydraulic performance analysis of the channel forming unit 100 according to an embodiment of the present invention. Here, (a) of FIG. 7 is an image of a hexagonal channel analysis model, and (b) of FIG. 7 is an image of a rectangular channel analysis model. And, in FIG. 8, the Honeycomb graph (a graph) is a graph for an analysis model including a channel forming unit 100 having a hexagonal cross-sectional shape of the channel 110, and a square graph (b graph) is a channel 110 It is a graph of an analysis model including a channel forming unit 100 having a quadrangular cross-sectional shape. And, in FIG. 7, it may mean that the pressure is low in the order of red-orange-yellow-green-blue.

As shown in Figs. 7 and 8, even though the flow velocity of the fluid passing through the hexagonal channel analysis model and the flow velocity of the fluid passing through the square channel analysis model are set to be the same, the fluid inflow loss of the hexagonal channel analysis model is more than that of the square channel analysis model. Is less, and it can be seen that the decompression performance of the hexagonal channel analysis model is improved by 8%. This may be a phenomenon that occurs because the fluid flow in the channel 110 of the hexagonal channel analysis model is smoother than the flow of the fluid in the channel 110 of the square channel analysis model, and the fluid flow resistance value is low.

9 is an image of turbulent kinetic energy of fluid in the channel forming unit 100 according to an embodiment of the present invention, and FIG. 10 is an image of turbulent motion of fluid in the channel forming unit 100 according to an embodiment of the present invention. It is a graph of energy. Here, (a) of FIG. 9 is an image of a hexagonal channel analysis model, and (b) of FIG. 9 is an image of a rectangular channel analysis model. And, in FIG. 10, a Honeycomb graph (a graph) is a graph for an analysis model including a channel forming unit 100 having a hexagonal cross-sectional shape of the channel 110, and a square graph (b graph) is a channel 110 It is a graph of an analysis model including a channel forming unit 100 having a quadrangular cross-sectional shape. In addition, in FIG. 9, it may mean that the turbulent kinetic energy is low in the order of red-orange-yellow-green-blue.

Turbulence kinetic energy may mean the sum of components that disturb the velocity of a fluid. 9 and 10, it can be seen that the maximum turbulent kinetic energy of the fluid in the channel 110 of the hexagonal channel analysis model is higher than the fluid in the channel 110 of the square channel analysis model. This is because the flow velocity of the fluid increases due to a constant laminar flow after a predetermined time, resulting in the occurrence of eddy, resulting in an increase in turbulent kinetic energy, which is more easily generated in the hexagonal channel analysis model than in the rectangular channel analysis model. It could be because. The fluid flow in the hexagonal channel analysis model, unlike the flow of the fluid in the quadrangular channel analysis model, may be uniformly formed by the generation of vorticity rather than a small turbulence interfering with the fluid flow in multiple angles.

11 is an image of turbulence dissipation of fluid in the channel forming unit 100 according to an embodiment of the present invention, and FIG. 12 is an image of turbulence dissipation of fluid in the channel forming unit 100 according to an embodiment of the present invention. It is a graph for. Here, (a) of FIG. 11 is an image of a hexagonal channel analysis model, and (b) of FIG. 11 is an image of a rectangular channel analysis model. And, in FIG. 12, a Honeycomb graph (a graph) is a graph for an analysis model including a channel forming unit 100 having a hexagonal cross-sectional shape of the channel 110, and a square graph (b graph) is a channel 110 It is a graph of an analysis model including a channel forming unit 100 having a quadrangular cross-sectional shape. In addition, in FIG. 11, it may mean that the turbulence dissipation rate is low in the order of red-orange-yellow-green-blue.

Turbulence Eddy Dissipation may be a rate of change in time transmitted by dividing the kinetic energy of a fluid into small vortices (swirls). 11 and 12, it can be seen that the turbulent dissipation rate of the fluid in the hexagonal channel analysis model is higher than that of the fluid in the square channel analysis model. In the fluid flow in the hexagonal channel analysis model, it can be confirmed that the turbulent flow that is generally generated is converted to laminar flow and thus the kinetic energy increases, and accordingly, the kinetic energy of the fluid discharged from the hexagonal channel analysis model is discharged from the rectangular channel analysis model It can be seen that the kinetic energy of the fluid is increased by 50%. As such, the relatively increase in the turbulent dissipation rate of the hexagonal channel analysis model than the turbulence dissipation rate of the rectangular channel analysis model may be due to the conversion of turbulent fluid in the hexagonal channel analysis model to constant kinetic energy or to vibration energy. have.

13 is an image of a turbulent flow vortex of a fluid in the channel forming unit 100 according to an embodiment of the present invention. Here, (a) of FIG. 13 is an image of a hexagonal channel analysis model, and (b) of FIG. 13 is an image of a rectangular channel analysis model. In addition, in FIG. 13, it may mean that the half of the turbulent flow occurs in the order of red-orange-yellow-green-blue.

As shown in FIG. 13, when comparing the turbulence eddy frequency of the fluid in the hexagonal channel analysis model with the turbulence eddy frequency of the fluid in the rectangular channel analysis model, turbulence vortex generation in the fluid in the hexagonal channel analysis model It can be seen that the frequency increases by 52%, but the area where the turbulent vortex occurs is reduced.

14 is an image of the shear stress of the channel 110 of the channel forming unit 100 according to an embodiment of the present invention. Here, (a) of FIG. 14 is an image of a hexagonal channel analysis model, and (b) of FIG. 14 is an image of a rectangular channel analysis model. And, in FIG. 14, it may mean that the shear stress is low in the order of red-orange-yellow-green-blue.

14, when comparing the shear stress of the fluid in the hexagonal channel analysis model and the shear stress of the fluid in the rectangular channel analysis model, the shear stress of the channel 110 in the hexagonal channel analysis model is 52 % Increase, but it can be seen that the area where the shear stress occurs is reduced.

15 and 16 are images of fluid mass flow through the channel 110 and the flow hole 120 of the channel forming unit 100 according to an exemplary embodiment of the present invention. Here, Figure 15 (a) is an image of the fluid mass flow in the channel 110 of the hexagonal channel analysis model, and Figure 15 (b) is an image of the fluid mass flow in the flow hole 120 of the hexagonal channel analysis model to be. In addition, Figure 16 (a) is an image of the fluid mass flow in the channel 110 of the square channel analysis model, and Figure 16 (b) is an image of the fluid mass flow in the flow hole 120 of the square channel analysis model. to be. In addition, in FIGS. 15 and 16, it may mean that the fluid mass flow is low in the order of red-orange-yellow-green-blue.

15 and 16, when comparing the fluid mass flow in the hexagonal channel analysis model with the fluid mass flow in the quadrangular channel analysis model, the fluid mass flow in the hexagonal channel analysis model increased by 6% and the fluid mass flow change Since it is relatively small, it can be confirmed that the occurrence of pulsation and cavitation in the fluid flow in the hexagonal channel analysis model is small.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative and non-limiting in all respects. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention.

100: channel forming unit 110: channel
111: bending portion 121: first channel inlet and outlet
122: second channel inlet and outlet 120: flow hole
130: lower channel plate 200: valve trim
210: central passage 211: inlet of central passage
220: upper wall 221: hole in the upper wall
300: valve body 310: inlet of the valve body
320: outlet of the valve body 331: first body flow path
332: second body flow path 333: connection hole
400: drive shaft part 500: moving part
510: outlet of the flowing part

Claims (12)

A valve body having an inlet through which fluid flows in at one side and an outlet through which fluid is discharged at the other side, and having a flow path connecting the inlet and the outlet;
A valve trim formed in the flow path of the valve body, opening and closing the flow path of the valve while rising up and down, and having a center flow path, which is a flow path formed along a central axis therein;
A flow hole, which is a hole through which fluid flows is formed at a center portion, which is coupled to the upper portion of the valve trim and is formed by stacking a plurality of the flow holes, and a plurality of channels through which fluid flows along an outward direction from the flow hole are the flow holes. Channel forming units arranged radially at uniform intervals around the; And
Including; is formed by being inserted into the central flow path, and coupled to the valve trim to lift the valve trim up and down;
A plurality of bending portions formed in a repeating pattern are connected to one to form one channel, and the length of the bending portion forming the channel increases from the flow hole toward the outer side of the channel, so that the flow length of the fluid The efficiency of reducing the hydraulic pressure of the fluid is increased by increasing the value of and changing the hydraulic direction multiple times,
When the cross-sectional shape of the channel is formed in a regular hexagon, the fluid flow resistance is reduced to increase the fluid flow efficiency, and the fluid mass flow change is reduced to reduce the occurrence of pulsation and cavitation in the fluid flow.
delete The method according to claim 1,
The channel,
A first channel inlet and outlet connected to the flow hole, and
A pressure reducing control valve comprising: a second channel inlet and outlet connected to the flow path of the valve body.
The method of claim 3,
Each of the second channel inlets and outlets formed in the channels of each of the plurality of stacked channel forming portions is helically arranged along a circumferential direction of a side surface of the valve trim.
The method according to claim 1,
The channel forming unit,
An upper channel plate forming an upper portion of the channel forming part and having a groove for forming the channel, and
And a lower channel plate forming a lower portion of the channel forming part and having a groove for forming the channel in a shape corresponding to the upper channel plate.
delete The method according to claim 1,
The valve body,
A first body flow path formed from the inlet to a lower portion of the valve trim,
A second body flow path connected to the first body flow path and formed from an upper portion of the valve trim to the outlet, and
A pressure reducing control valve comprising a connection hole connecting the first body flow path and the second body flow path.
The method of claim 7,
The valve trim is a pressure reducing control valve, characterized in that formed through the connection hole.
The method according to claim 1,
The pressure reducing control valve, characterized in that the central flow channel and the flow hole are connected to each other.
The method according to claim 1,
The pressure reducing control valve, characterized in that the central axis of the central flow channel and the central axis of the flow hole are formed equally.
The method according to claim 1,
A pressure reducing control valve, characterized in that a plurality of channel forming units are stacked on the valve trim to form an upper channel module.
In the pressure reducing control method using the pressure reducing control valve of claim 1,
A first step of flowing a fluid through the inlet and flowing under the valve trim;
A second step of flowing a fluid into an inlet of a central passage formed under the valve trim and flowing to an upper portion of the valve trim along the central passage;
A third step in which the fluid flows into the flow hole of the channel forming part formed on the upper part of the valve trim, passes through the channel, is depressurized, and discharges to the outlet; And
And a fourth step of controlling the flow rate of the fluid passing through the valve trim and the channel forming unit by changing the position of the valve trim by moving up and down.

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