KR200213464Y1 - cage assembly for high pressure -fluid control valve - Google Patents

Abstract

The present invention is a cage assembly for a control valve that forms a vortex by the high-pressure oil fine curved flow path, forcibly guide the eddy current resistance acting on the fluid to reduce the flow pressure and speed of the fluid to prevent internal leakage to provide. The cage assembly has a plurality of through holes formed therein, and an inner surface of the inner wall, the outer wall, an upper surface on which the first projection and the second projection are formed to form a curved flow path between the inner wall and the outer wall. A plurality of disks having a lower surface formed from the periphery toward the outer periphery and stacked on each other to form a dummy; An upper plate disposed on an upper portion of the disk pile, the upper plate having a plurality of fixing holes communicating with each through hole drilled in each disk; A lower plate disposed at a lower portion of the disk pile and having a plurality of fixing holes communicating with each of the through holes drilled in each disk and the respective fixing holes of the upper plate; And a fixing device for assembling the disk pile by inserting the through-hole formed in each disk, the fixing hole of the upper plate, and the communication hole communicating with the fixing hole of the lower plate.

Description

Cage assembly for high pressure -fluid control valve

The present invention relates to a cage assembly for a high pressure oil control valve, and more particularly, the micro-channel cross-conversion portion formed on the upper surface of the disk and the vortex generating portion formed on the lower surface, so that the vortex and attenuation is effectively generated even at high pressure and high speed. A cage assembly for a high pressure oil control valve is easy to manufacture and assemble.

In general, although not limited, a high pressure oil control valve is widely used as a means for controlling a high temperature and high pressure fluid mainly used in an industry such as a nuclear power plant, a chemical plant, a steel mill, and the like. Such high pressure oil control valves should prevent internal leakage, malfunction, cavitation, high noise, high vibration, etc., to prevent equipment failure, equipment shutdown, and adverse conditions in the workplace atmosphere. In addition, such a high pressure oil control valve is expensive, and a high level of manufacturing technology and maintenance technology is currently being researched actively.

Such a control valve may be classified into various types such as orifice type, labyrinth type, curved maze type, and three-dimensional lattice type according to the type and characteristics of the fluid to be controlled. Of course, the high-pressure oil control valve that can be divided in this way can vary the size or capacity according to the density, speed, cage shape of the fluid bar, for example, in the case of the labyrinth type using the fluid redirection device It is determined by the number, shape, cross-sectional area, surface roughness, bend distance, or a combination of these factors. In addition, such a control valve is a damping device for controlling the speed and pressure drop of a fluid that can be used under adverse conditions requiring a rapid pressure drop, particularly under high temperature and high pressure, and a high differential pressure flow rate requiring control of fluid flow speed, pressure, noise, and high vibration. Applications include fluid control devices for regulating flow rates of control fluids such as control valves, high speed fluid depressurization devices, silencers, and the like.

As a conventional example of such a flow control valve, U.S. Patent Nos. 4,105,048, 4,279,274, 4,352,373, 4,407,327, 4,456,033, 4,567,915, 4,617,963, 4,921,014, 5,732,738, There are applications for multipath and multistage assembly, such as 5,819,803, 5,941,281, and the like. Control valves of this kind are also disclosed in Korean Utility Model Registration No. 20-0176124 and Korean Patent Publication No. 2000-0009026. These control valves are operated in such a way that they absorb energy at the fluid flow attenuation site along the curved flow path in which the flow path of the fluid is diverted.

However, these conventional control valves have been shown to cause some problems.

First, by manufacturing the valve by welding, there is a problem that the flow damping device such as a cage is blocked by foreign substances such as welding dregs, solid solution, and corrosion products remaining in the valve and floating in the fluid. . In addition, in order to increase the efficiency of the flow path, two or more attenuating devices are manufactured in a complicated structure, and by welding them by partial assembly or welding, foreign matters are deposited in the flow path, which makes it difficult to control the flow rate.

In addition, since the parts are difficult to disassemble, repair and cleaning are not easy, and manufacturing costs are expensive.

Moreover, in the case of controlling the high speed fluid, if the structure of the flow path is not dense or sophisticated, the flow path may be eroded, corroded, high noise, vibration, etc., and its size gradually increases over time. For example, in a fluid that uses mainly water, erosion occurs when the flow velocity of the fluid is about 12 m / sec or more. Flashing occurs when the pressure decreases and the pressure decreases below the vaporization pressure. This happens, and there is a problem that cavitation is caused when the pressure rises above the vaporization pressure.

Therefore, the present invention has been devised to solve the above-mentioned problems, and an object of the present invention is to provide a high pressure and a high velocity in water, steam, an ideal fluid in which water and steam are mixed, or a transition zone or a high differential pressure. It is to provide a cage assembly for a high pressure oil control valve that can effectively control the flow rate by attenuating and resisting.

Another object of the present invention is to provide a cage assembly for a high pressure oil control valve which is prevented from clogging due to foreign substances, the structure is simple, and the manufacturing cost is low.

Still another object of the present invention is to provide a cage assembly for a high pressure oil control valve that can be easily disassembled and assembled, can be easily cleaned, and the disk can be easily replaced.

Another object of the present invention is to provide a cage assembly for a control valve that can be manufactured without using a welding process.

1 is a cross-sectional view schematically showing a high pressure oil control valve to which the cage assembly according to the present invention is applied.

Figure 2 is an exploded perspective view showing a chamfer assembly according to the present invention.

3 is a plan view of a disk constituting the cage assembly of FIG.

4 is a partially enlarged perspective view showing the structure of the flow path of the disk of FIG. 3 in detail.

5 is a bottom view of the disk of FIG. 3.

FIG. 6 is a partially enlarged perspective view showing in detail a portion of the bottom of the disk of FIG. 5; FIG.

7 is a cross-sectional view of FIG.

8 is a perspective view showing a state in which the disk of FIG. 3 is assembled in a stack.

9 is a cross-sectional view of the cage assembly according to the present invention assembled.

♠ Explanation of symbols used in the main part of the drawing.

10: first passage 12: second passage

14: valve body 16: bonnet

18: plug 22: cage assembly

24: disc 26: top plate

28: lower plate 30: fixing device

34: through hole 36: inner circumferential wall

38: outer wall 40: first protrusion

42: second projection 44: euro

46: groove 48,50: fastener

54: guide sleeve 56: slit

58: fixed rod 60: first fixing end

62: second fixing stage

These objects are provided in the high pressure oil control valve having a valve body having a first passageway and a second passageway, a bonnet fixed to the valve body, and a plug reciprocating in the body and the inner space of the bonnet. In the cage assembly for the high pressure oil control valve for inducing and generating and controlling the fluid in a resistance manner to the fluid, the plug reciprocating opening is formed in the center, and a plurality of fixing holes are drilled at the same distance in the radial direction. The upper surface is alternately arranged along the circumference to form a mutually curved channel between the inner circumferential wall, the outer circumferential wall spaced at a predetermined distance from the inner circumferential wall and forming the outer circumference of the disk, and the inner circumferential wall and the outer circumferential wall. The first protrusion and the second protrusion are formed, and the lower surface has a plurality of grooves at regular intervals from the inner circumference to the outer circumference. Sex and, it is mutually stacked plurality of disks forming the pile; An upper plate disposed on an upper portion of the pile of disks and having a plurality of fixing holes communicating with each of the through holes drilled in the respective disks; A lower plate disposed in a lower portion of the pile, the lower plate having a plurality of fixing holes communicating with each of the through holes drilled in the respective disks and the respective fixing holes of the upper plate; And a fixing device inserted into the communication hole through which the through hole formed in each of the disks, the fixing hole of the upper plate, and the fixing hole of the lower plate communicate with each other, for assembling the respective disks to the upper plate and the lower plate. It can be achieved by the cage assembly for the control valve.

Before describing the cage assembly for a control valve according to the present invention in detail, for reference, the theoretical basis for configuring the carriage assembly for the high pressure oil control valve according to the present invention will be described by using an equation.

First, the flow coefficient (Cv) of the valve

Represented by

Where Q = Flow Rate (US Gal / min), Sg = Specific Gravity, ?? P = Presusure Drop (psi).

Next, the flow path area A is

Represented by

Wherein d = valve flow path diameter (m) and Am = sum of the cross-sectional area of the labyrinth flow path inlet (m 2); Am = nd ?? wd ?? np, where nd = disc maze flow, the number of discs, np = number of flow paths, w = height m of flow paths, and b = width m of flow paths.

Also, the number of bends (nt)

Represented by

Where K _tot is the total loss factor, K is the loss factor of the valve, K _{L is the} bent loss factor, A is the flow path area in m 2, and Am is the sum of the maze inlet cross-sections in m 2.

From the above equations, when the pressure drop and the velocity loss coefficient of the bend of the flow path become large, the fluid velocity and pressure are attenuated. Thus, even when the fluid is at a high differential pressure, high vibration, high noise, cavitation, etc. are remarkably attenuated, thereby allowing flexible and quiet flow control. It can be seen that.

Referring to these equations, the vortices and fluid resistances in the flow paths formed in each of the disks constituting the carriage assembly can be adjusted appropriately so as to induce vortices while effectively absorbing the pressure and velocity of the fluid. The carriage assembly is provided with a plurality of fine curved flow paths which can be formed in a flexible manner, and which can produce a large differential pressure in the attenuation portion of the speed and pressure and can effectively absorb the kinetic energy of the fluid without changing the flow path cross-sectional area.

In addition, a carriage assembly is provided in which the front face of the disk has an improved flow path and the vortex generating part on the back surface of the disk so that the attenuation is good for each of the small flow path crossing parts by using the heat flow and hydraulic change of the fluid.

In addition, in order to effectively generate the vortex of the right angle intersection of the micro-channel on the front side of the disk, the right angled corner is slightly rounded, and the right angled edge of the some free ends is kept at right angle, so that the vortices caused by the rotational force are absorbed flexibly. A carriage assembly is provided that is well established.

In addition, a certain flow path can be arranged in a zigzag shape on a disc, a standard can be fixed, a disc can be separated, a state can be observed and inspected periodically, and the necessary discs can be interchanged and installed in any direction. A carriage assembly is provided which does not change flow rate or attenuation even when replaced.

In addition, the disc is provided with a carriage assembly which can be simply assembled so that the assembling direction does not need an angle or direction and the disc surface with the flow path is upward.

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

First, in Figure 1, the high-pressure oil control valve in which another carriage assembly is built in the present invention is basically a valve body having a first passage 10 and a second passage 12 through which fluid can be introduced and discharged. (14) is provided. On the upper portion of the valve body 14, a bonnet 16 communicating with the inside thereof is fixed by fastening means such as bolts and nuts. The plug 18 is reciprocated in the inner space of the body 14 and the bonnet 16, and the stem 18 is actually connected to the plug 18 for reciprocating the plug. A guide 21 for guiding the plug 18 is installed between the body 14 and the bonnet 16. In addition, the valve body 14 is a so-called resistance device in order to actually control the fluid in a manner that resists or resists the flow of the fluid passing through the respective fluid passages 10 and 12. A carriage assembly 22 called therein is built in. In addition, a sealing ring 23 is provided at an inner lower portion of the body 14 in which the carriage assembly 22 is installed.

As shown in FIG. 2, the carriage assembly 22 includes a plurality of discs or disks 24. Each disk 24 is assembled in a stacked state as shown in the figure. The upper plate 26 is disposed above the disk 24 pile, and the lower plate 28 is disposed below the disk pile. In addition, a plurality of fasteners 30 are provided for disposing or assembling each disk 24 between the upper plate 26 and the lower plate 28.

As shown in FIG. 3, an entrance hole 32 through which the plug 18 is accessible is formed at the center of each disk 24 constituting the carriage assembly 22. In addition, each disk 24 is provided with a plurality of fixing holes 34 formed to be mutually fixed by the respective fixing device.

In particular, as shown in detail in FIG. 4, the upper surface of each disk 24 forms a through hole and has an inner circumferential wall 36 having a predetermined height, and spaced apart from the inner circumferential wall 36 by a predetermined distance. The outer circumferential wall 38 having a predetermined height forming the outer periphery is integrally formed. In addition, between the inner circumferential wall 36 and the outer circumferential wall 38, the first protrusions 40 and the second protrusions 42 are formed alternately. On each side of each protrusion 40; 42 a plurality of protrusions are integrally formed. That is, a plurality of first protrusion pieces 40a are formed at one side of the first protrusion part 40, and a plurality of second protrusion pieces 40b are formed at the other side thereof, and a first protrusion part is formed at one side of the second protrusion part 42. A piece 42a is formed and a plurality of second protrusion pieces 42b are formed on the other side. In particular, a curved flow path 44 is formed between each of the first protrusions 40 and the second protrusions 42 by them. That is, the flow path 44 is further formed by one side of the first protrusion 40 and the other side and the second protrusion 42b of each of the first protrusions 40a and the second protrusions 42 formed on one side thereof. The second projection piece 40b formed on the other side and the other side of the first projection part 40 and one side of the second projection part 42 and the second projection piece 42a on one side thereof are continuously formed repeatedly. As the flow paths 44 are formed as described above, each flow path 44 forms a zigzag or continuous '??' shape, so that each of the protrusions 40a, 42b, 40b, 42a in each flow path 44 is formed. They cause the vortex flow of the fluid. On the other hand, it is preferable that the connecting portion of each of the protrusions 40a, 40b; 42a, 42b of each of the protrusions 40; 42 is rounded to amplify the vortex flow of the fluid. In addition, the height of each of the protrusions 40 and 42 formed on the upper surface of the disk 24 is formed higher than the height of the inner circumferential wall 36 and the outer circumferential wall 38 formed on the inner and outer sides of the disk. .

5-7, a plurality of grooves 46 are formed in the lower surface of each disk 24 to effectively absorb or disperse vortices and resistances as fluid flows along the flow path. Each of the grooves 46 is preferably formed at regular intervals from the inner periphery of the disk 24 toward the outer periphery. Each groove 46 is formed in a closed circle and preferably also has a right cross section. In particular, it is preferable that the formation range of each disk 24 is formed only in the range of about 70% from the inner circumference 24a of the disk 24 toward the outer circumference 24b, which is followed by other disks 24. This is to improve the attenuation by promoting the vortex flow of the high-pressure and high-speed fluid flowing along the fine curved flow path of the. On the other hand, from the outermost groove 46 formed on the upper surface of the disk 24 to the outer side, that is, the remaining 30% portion of the upper surface of the disk is formed to maintain a plane to facilitate the inflow of fluid desirable. According to the structure of the lower surface of the disk, the fluid is attenuated primarily in the circumferential and radial directions while passing through the flow path formed on the upper surface of one disk 24, and in addition to the back of the other base. It can be attenuated once more in the radial direction by the formed groove 46 can improve the attenuation efficiency of the resistance of the fluid.

Referring back to FIG. 2, the upper plate 26 is perforated with fixing holes 48 corresponding to the through holes 34 formed in the respective discs 24, and similarly, the lower plate 28 also has each disc ( A fixing hole 50 corresponding to the through hole 34 drilled in 24 is formed.

On the other hand, the fixing device 30 for coupling the disk 14 pile to the upper plate 26 and the lower plate 28 is a through hole 34 formed in each disk 24, and the fixing hole of the upper plate 26 ( 48 and a guide sleeve 54 inserted into the communication hole through which the fixing hole 50 of the lower plate 28 communicates. The guide sleeve 54 is inserted into the communication hole is formed with a slit 54 cut in the longitudinal direction to have elasticity so that it can be stably maintained. The fixing rod 58 is inserted into the guide sleeve 54. The first fixing end 60 is formed at one end of the fixing rod 58, and the second fixing end 62 is formed at the other end thereof. In addition, one first washer 64 and two first bolts 66 are releasably fastened to the first fixing end 60 of the fixing rod 58 for stable fixing and coupling. Similarly, one second washer 68 and two second bolts 70 are also releasably fastened to the second fixing end 62 of the fixed rod 58.

Hereinafter, an assembly method and a mode of operation of the carriage assembly 24 for a flow control valve according to the present invention will be described in detail.

First, as shown in FIG. 8, the operator has to coincide with each of the through-holes 34 drilled in each of the disks 24 so that the upper surface of the disks 24 are identically formed. To be laminated. In this way, in a state where a plurality of disks 24 are stacked to form a disk pile, the worker places the upper plate 26 and the lower plate 28 on the upper and lower portions of the disk pile, respectively. At this time, both the fixing hole 48 of the upper plate 26 and the fixing hole 50 of the lower plate 28 are arranged to communicate with the corresponding through hole 34 of each disk 26 of the disk pile.

In this preliminary assembly, the operator inserts the guide sleeve 54 into each of the fixing holes of the upper and lower plates and the respective communicating holes of the through space of the disk. At this time, the slit 56 cut in the longitudinal direction of the guide sleeve 54 can be easily inserted into the communication hole as well as can be firmly maintained in the inserted state. Thereafter, the operator inserts the fixing rod 58 into each guide sleeve 54, inserts the first washer 64 into the first fixing end 60 of the fixing rod 58, and then removes the Tighten 1 bolt (66). Similarly, by inserting the second washer 68 into the second fixing end 62 of the fixed rod 58 and fastening the second bolt 70, as shown in Figure 9, assembly of the carriage assembly 22 This is done. Thereafter, of course, the fully assembled carriage assembly 22 is inserted into the interior between the first passage 10 and the second passage 12 of the valve body 14, as shown in FIG. 1, and the plug 18 Is inserted into the access hole 32 of the assembly, the guide 21 for guiding the plug is installed, and finally the bonnet 16 is fixed to the valve body 14 to complete the configuration of the high pressure oil control valve. do.

In the high pressure oil control valve configured as described above, the fluid is introduced through the first passage 10 or the second passage 12 or discharged through the respective passages. At this time, the fluid is formed between the flow path formed between each disk 24 constituting the carriage assembly 22, that is, between the inner circumferential wall 36 and the outer circumferential wall 38 of the upper surface of each disk 24. A zigzag flow path formed by each of the protruding pieces 40a, 40b; 42a, 42b formed on the side surfaces of the first protrusion 40 and the second protrusion 42, and ring-shaped on the lower surface of each disk 24. The vortex is effectively formed by the three-dimensional flow path formed by the plurality of grooves 46 formed, and the resistance of the vortex is forcibly guided to attenuate the flow pressure and the flow rate of the rapeseed, thereby stably and accurately controlling the fluid without internal leakage. You can do it. On the other hand, since the groove 46 is formed only in the range of about 70% from the inner circumference to the outer circumference of the lower surface of the disk 24 and is formed as a flat portion thereafter, the grooves are formed along the fine curved flow path. In addition, the vortex flow of the high pressure and high velocity fluid is additionally promoted to attenuate the attenuation, while the flat part can smoothly flow and enter the fluid.

Meanwhile, a guide sleeve 54 inserted into each of the through holes 34 and the fixing holes 48 and 50 formed in each of the disks 24 and the upper plate 26 and the lower plate 28 constituting the carriage assembly; By being fixed by the fixing rod 58 and the washers (64, 68) and nuts (66, 70) inserted and fastened to both ends thereof, it can be firmly assembled. In addition, when controlling the fluid at high pressure, high temperature, and high speed, the torsion or relaxation is prevented during the supercooling or the overheating of the fluid, thereby preventing cavitation, corrosion, abrasion, erosion, high vibration, and inflow of foreign substances.

As described above, according to the cage assembly for the high pressure oil control valve according to the present invention, the vortex is formed by the finely curved flow path formed in the cage assembly, forcibly guide the vortex resistance acting on the fluid to force the flow pressure of the fluid By preventing the internal leakage by reducing the over speed, it is possible to fundamentally block the inflow of cavitation, corrosion, wear, erosion, high vibration, high noise and foreign matter, there is an effect that improves the productability.

In addition, each disk has the advantages of being repairable and replaceable, easy to assemble, simple to manufacture and inexpensive.

In addition, the welding part is completely omitted, thereby preventing the flow and deposition of foreign substances such as debris generated during welding, and even when the fluid itself or the control environment changes, there is an effect of completely preventing deformation or malfunction.

In the above, the preferred embodiment according to the present invention has been described in detail, but it will be understood by those skilled in the art that various modifications and variations can be made without departing from the scope of the appended utility model claims.

Claims (6)

A valve body 14 having a first passage 10 and a second passage 12 through which fluid flows in and out, a bonnet 16 fixed to the valve body 14, a body 14, and a bonnet 16. In the cage assembly for the high pressure oil control valve for controlling the fluid in the high pressure oil control valve having a plug 18 reciprocating in the inner space of An entrance hole 32 reciprocating with the plug 18 is formed at the center thereof, and a plurality of fixing holes 34 are drilled at equal distances in the radial direction, and an inner circumferential wall 36 and an inner circumferential wall at an upper surface thereof. Alternating along the circumference to form a mutually curved channel 44 between the inner circumferential wall 38 and the outer circumferential wall 38 and the outer circumferential wall 38 which are spaced apart from the predetermined distance 36 and constitute the outer circumference of the disk. The first protrusion 40 and the second protrusion 42 are formed to be formed, the lower surface has a plurality of grooves 46 are formed to form a predetermined interval from the inner periphery to the outer periphery, are stacked on each other to form a pile A plurality of disks 24; An upper plate 26 disposed on an upper portion of the pile of disks 24 and having a plurality of fixing holes 48 communicating with respective through holes 34 drilled in the respective disks 24; A plurality of fixings disposed below the pile of disks 24 and communicating with respective through holes 34 drilled in the respective disks 24 and respective fixing holes 48 of the upper plate 26. A lower plate 28 through which the balls 50 are perforated; And The through-hole 34 formed in each of the disks 24, the fixing hole 48 of the upper plate 26 and the fixing hole 50 of the lower plate 28 is inserted into the communication hole to communicate with each disk Cage assembly for a high pressure oil control valve comprising a fixing device 30 for assembling the upper and lower plates. The method of claim 1, wherein a plurality of first protrusion pieces 40a are formed on one side of the first protrusion 40 of the disk 24, and a plurality of second protrusion pieces 40b are formed on the other side, and the second One side of the protrusion 42 is formed with a first protrusion 42a and a plurality of second protrusions 42b are formed at the other side, and a zigzag flow path is formed between the second protrusion 40 and the second protrusion 42. Cage assembly for a high pressure oil control valve, characterized in that formed. 3. The cage assembly for a high pressure oil control valve according to claim 2, wherein the connecting portion of each of the protrusions (40a, 40b; 42a, 42b) of each of the protrusions (40; 42) is rounded. 2. The grooves of claim 1, wherein each of the grooves 46 formed in the lower surface of each disk 24 is formed in a closed circle and has a right angled cross section, wherein the lower surface of the disk faces from the inner circumference to the outer circumference. Cage assembly for a high pressure oil control valve, characterized in that formed only in the range of about 70%. The method of claim 1, wherein the fixing device 30 A guide sleeve 54 inserted into a communication hole through which the through hole 34 formed in each of the disks 24, the fixing hole 48 of the upper plate 26, and the fixing hole 50 of the lower plate 28 communicate. ); A fixed rod 58 inserted into the guide sleeve 54 and having a first fixed end 60 formed at one end thereof and a second fixed end 62 formed at the other end thereof; A first washer 64 and two first bolts 66 fixed and fastened to the first fixing end 60 of the fixing rod 58; And Cage assembly for a high pressure oil control valve, characterized in that it comprises a second washer (68) and two second bolts (70) fixed and fastened to the second fixing end (62) of the fixed rod (58). 6. The high pressure oil control valve according to claim 5, wherein the guide sleeve (54) is formed with a slit (56) cut in the longitudinal direction.