Pressure-reducing trim and joule-thomson valve including the same

Abstract

A pressure reduction trim according to one embodiment of the present invention comprises a cage including a plurality of stacked annular disks, an annular base supporting the cage, and a cage cover covering the cage, wherein the cage has a plurality of stepped holes that provide a pressure reduction path for a fluid.

Description

Technology Field

[0001] The present invention relates to a pressure reducing trim and a Joule-Thomson valve including the same, and more specifically, to a pressure reducing trim for reducing fluid pressure and a Joule-Thomson valve including the same, and more specifically, to a pressure reducing trim in which fluid flow is uniformly distributed during pressure reduction, durability is improved, and assembly is easy, and to a Joule-Thomson valve including the same. Background Technology

[0002] Generally, a Joule-Thomson valve is a valve that reduces the pressure of a high-pressure fluid under adiabatic conditions to convert it into a low-temperature fluid, and is used in various cryogenic manufacturing devices such as LNG plants, refrigerant circulation systems, gas separation devices, and semiconductor manufacturing equipment.

[0003] These Joule-Thomson valves gradually reduce fluid pressure through an internal pressure-reducing trim, utilizing the Joule-Thomson effect in which the fluid temperature decreases during this process.

[0004] The pressure reducing trim is a key operating part inside the Joule-Thomson valve that directly controls fluid flow; it consists of a disk, seat, cage, etc., and performs the function of controlling fluid pressure, flow rate, temperature, etc.

[0005] However, conventional depressurization trims may cause uneven fluid flow during depressurization or deformation and damage to the disc due to problems such as poor disc stacking, insufficient assembly precision, and reduced wear resistance.

[0006] In this case, it leads to a decrease in the pressure reduction performance of the Joule-Thomson valve, the generation of vibration and noise, and a shortened maintenance cycle, which can reduce the efficiency of cryogenic manufacturing equipment in which the Joule-Thomson valve is used. Prior art literature

[0007] Korean Registered Patent Publication No. 10-2176498 (Method for manufacturing a Joule-Thomson valve trim using diffusion bonding, published Nov. 09, 2020) The problem to be solved

[0008] The objective of the present invention is to provide a pressure reduction trim that allows for uniform distribution of fluid flow during pressure reduction, improved durability, and easy assembly, and a Joule-Thomson valve including the same. means of solving the problem

[0009] To achieve the aforementioned purpose, one embodiment of the present invention provides a pressure reduction trim comprising: a cage (100) including a plurality of stacked annular disks (110, 110a, 110b, 110c); an annular base (200) supporting the cage (100); and a cage cover (300) covering the cage (100), wherein the cage (100) has a plurality of stepped holes (SH) that provide a pressure reduction path for a fluid.

[0010] Here, a pair of fixing pins (400) may be further included to be inserted into the base (200) and the cage (100) to align and fix the base (200) and the cage (100).

[0011] At this time, the base (200) and the disk (100) may have a pair of pin holes (PH) through which the fixing pin (400) passes.

[0012] Additionally, each of the plurality of disks (110, 110a, 110b, 110c) comprises a lower disk (111) and an upper disk (112) that are joined vertically to each other, wherein the lower disk (111) comprises a lower plate (11) having a lower central hole (DCH) and a lower outer wall (12) extending vertically from the outer edge of the lower plate (11), wherein the lower plate (11) has a plurality of lower holes (DH) penetrating the lower plate (11), and the upper disk (112) comprises an upper plate (21) having an upper central hole (UCH) and an upper inner wall (22) extending vertically from the inner edge of the upper plate (21), wherein the upper plate (21) has a plurality of upper holes (UH) penetrating the upper plate (21), and the lower holes (DH) and the upper holes (UH) overlap each other to form the step It can form a hole (SH).

[0013] Here, the lower hole (DH) includes a first lower hole (DH1) communicating with the lower outer wall (12) and a second lower hole (DH2) located spaced apart from the first lower hole (DH1) and communicating with the inner surface of the lower plate (11), and the upper hole (UH) includes a first upper hole (UH1) communicating with the outer surface of the upper plate (21) and a second upper hole (UH2) located spaced apart from the first upper hole (UH1) and communicating with the upper inner wall (22) of the disk (112), and the first lower hole (DH1) may overlap with the first upper hole (UH1), and the second lower hole (DH2) may overlap with the second upper hole (UH2).

[0014] At this time, the lower plate (11) has a first lower partition (11a) that divides the first lower hole (DH1) and a second lower partition (11b) that divides the second lower hole (DH2), and the upper plate (21) has a first upper partition (21a) that divides the first upper hole (UH1) and a second upper partition (21b) that divides the second upper hole (UH2), and the first lower partition (11a) and the first upper partition (21a) may be positioned opposite each other, and the second lower partition (11b) and the second upper partition (21b) may be positioned opposite each other.

[0015] And, among the plurality of disks (110, 110a, 110b, 110c), the first upper hole (UH1) and the second lower hole (DH2) between adjacent disks overlap each other, and the second upper hole (UH2) and the first lower hole (DH1) between adjacent disks can overlap each other.

[0016] Additionally, the base (200) comprises a base plate (210) having a base central hole (BCH) and a base inner wall (220) extending vertically from the inner edge of the base plate (210), and the base plate (210) has a plurality of base holes (BH) penetrating the base plate (210), and the base holes (BH) may overlap with the lower holes (DH).

[0017] Here, the base hole (BH) may include a first base hole (BH1) that overlaps with the first lower hole (DH1) and a second base hole (BH2) that is spaced apart from the first base hole (BH1), communicates with the outer surface of the base plate (210), and overlaps with the second lower hole (DH2).

[0018] At this time, the base plate (210) has a first base partition (210a) that divides the first base hole (BH1) and a second base partition (210b) that divides the second base hole (BH2), and the first base partition (210a) and the first lower partition (11a) are positioned opposite each other, and the second base partition (210b) and the second lower partition (11b) can be positioned opposite each other.

[0019] Meanwhile, another embodiment of the present invention provides a Joule-Thomson valve comprising: a valve body (BD) having a fluid flow passage (BD1); and a pressure reduction trim (TR) installed inside the fluid flow passage (BD1) of the valve body (BD) and reducing the pressure of the fluid to cool the fluid, wherein the pressure reduction trim (TR) is the aforementioned trim. Effects of the invention

[0020] According to the present invention, by including a cage and a base having a plurality of stepped holes, the fluid can be depressurized stepwise to uniformly disperse the fluid flow during depressurization, and accordingly, the durability of the depressurization trim can be improved.

[0021] In addition, according to the present invention, by including a pair of fixing pins inserted into the base and cage to align and fix the base and cage, assembly of the pressure reduction trim is easy, and thus replacement and maintenance of the pressure reduction trim are easy. Brief explanation of the drawing

[0022] FIG. 1 is a cross-sectional view of a Joule-Thomson valve including a pressure reduction trim according to an embodiment of the present invention. FIG. 2 is a perspective view of a pressure reduction trim according to one embodiment of the present invention. Figure 3 is an exploded perspective view of Figure 2. Figure 4 is a cross-sectional view taken along the line IV-IV' of Figure 2. Fig. 5 is a bottom view of Fig. 2. Figure 6 is an enlarged exploded perspective view of a pressure-reducing trim to explain a step hole. Figure 7 is an enlarged perspective view of the base and cage of Figure 6. Specific details for implementing the invention

[0023] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0024] Embodiments of the present invention will be described in detail below with reference to the drawings.

[0025] FIG. 1 is a cross-sectional view of a Joule-Thomson valve including a pressure reduction trim according to an embodiment of the present invention.

[0026] As illustrated in FIG. 1, a Joule-Thomson valve including a pressure reducing trim according to an embodiment of the present invention includes a valve body (BD), a pressure reducing trim (TR), a seat (SE), and a plug (PL).

[0027] The valve body (BD) may have a fluid flow passage (BD1) inside. A valve inlet (BD2) connected to the fluid flow passage (BD1) may be formed on one side of the valve body (BD), and a valve outlet (BD3) connected to the fluid flow passage (BD1) may be formed on the other side of the valve body (BD).

[0028] The pressure reduction trim (TR) is installed inside the flow passage (BD1) of the valve body (BD) and can cool the fluid by reducing the pressure of the fluid.

[0029] The seat (SE) is a ring-shaped member installed inside the flow passage (BD1) of the valve body (BD), and provides a sealing surface to which the pressure reducing trim (TR) is in close contact with the valve body (BD).

[0030] The plug (PL) has a rod shape and can be inserted into the central hole (CH) of the pressure reduction trim (TR). As this plug (PL) reciprocates in the up-and-down direction within the central hole (CH) of the pressure reduction trim (TR), the seat (SE) can open or close the flow path of the pressure reduction trim (TR), thereby regulating the fluid flow rate and pressure.

[0031] A stem is coupled to the upper part of the plug (PL), and the stem can provide a driving force for the reciprocating movement of the plug (PL).

[0032] Hereinafter, a pressure reduction trim according to one embodiment of the present invention will be described in detail with reference to the drawings.

[0033] FIG. 2 is a perspective view of a pressure-reducing trim according to an embodiment of the present invention, FIG. 3 is an exploded perspective view of FIG. 2, FIG. 4 is a cross-sectional view taken along the line IV-IV' of FIG. 2, FIG. 5 is a bottom view of FIG. 2, FIG. 6 is an enlarged exploded perspective view of the pressure-reducing trim to explain the step hole, and FIG. 7 is an enlarged perspective view of the base and cage of FIG. 6.

[0034] As illustrated in FIGS. 2 to 7, a pressure reduction trim according to one embodiment of the present invention includes a cage (100), a base (200), a cage cover (300), and a pair of fixing pins (400).

[0035] The cage (100) may include a plurality of stacked disks (110). In this embodiment, the cage (100) includes three disks (110a, 110b, 110c), namely the first disk (110a), the second disk (110b), and the third disk (110c), but is not necessarily limited thereto and the cage may be made of various numbers of disks.

[0036] The cage (100) may have a plurality of stepped holes (SH) of a stepped shape that provide a fluid pressure reduction path.

[0037] One disk (100) may have a planar annular shape. The disk (100) may include a lower disk (111) and an upper disk (112) that are joined together vertically.

[0038] The lower disk (111) may include a lower plate (11) and a lower outer wall (12).

[0039] The lower plate (11) has a circular shape and may have a circular lower central hole (DCH) in the center. The lower plate (11) may have a plurality of rectangular lower holes (DH) penetrating the lower plate (11). The lower holes (DH) may include a rectangular first lower hole (DH1) communicating with the lower outer wall (12) and the inner surface of the lower plate (11), and a rectangular second lower hole (DH2) located spaced apart from the first lower hole (DH1) and communicating with the inner surface of the lower plate (11).

[0040] The lower plate (11) may have a first lower partition (11a) that divides the first lower hole (DH1) into three spaces, and a second lower partition (11b) that divides the second lower hole (DH2) into two spaces. Adjacent first lower partition (11a) and second lower partition (11b) may be arranged staggered relative to each other.

[0041] The lower outer wall (12) may extend vertically from the outer edge of the lower plate (11). The lower outer wall (12) may be formed integrally with the lower plate (11).

[0042] The upper disk (112) may include an upper plate (21) and an upper inner wall (22).

[0043] The upper plate (21) has a circular shape and may have a circular upper central hole (UCH) in the center. The upper plate (21) may have a plurality of upper holes (UH) penetrating the upper plate (21).

[0044] The upper hole (UH) may include a first upper hole (UH1) communicating with the outer surface of the upper plate (21), and a second upper hole (UH2) located spaced apart from the first upper hole (UH1) and communicating with the upper inner wall (22) of the upper disk (112).

[0045] The upper plate (21) may have a first upper partition (21a) that divides the first upper hole (UH1) into two spaces and a second upper partition (21b) that divides the second upper hole (UH2) into two spaces. The adjacent first upper partition (21a) and second upper partition (21b) may be arranged staggered relative to each other.

[0046] The upper inner wall (22) may extend vertically from the inner edge of the upper plate (21). The upper inner wall (22) may be formed integrally with the upper plate (21).

[0047] At this time, the lower hole (DH) and the upper hole (UH) may overlap each other to form a stepped hole (SH). That is, the first lower hole (DH1) of the lower hole (DH) overlaps with the first upper hole (UH1) of the upper hole (UH), and the second lower hole (DH2) of the lower hole (DH) overlaps with the second upper hole (UH2) of the upper hole (UH). The first lower partition (11a) dividing the first lower hole (DH1) and the first upper partition (21a) dividing the first upper hole (UH1) are positioned in an alternating manner, and the second lower partition (11b) of the second lower hole (DH2) and the second upper partition (21b) of the second upper hole (UH2) are positioned in an alternating manner, thereby forming a stepped hole (SH) having a stepped shape.

[0048] These step holes (SH) can depressurize the fluid by progressively obstructing the fluid flow.

[0049] Additionally, the first upper hole (UH1) and the second lower hole (DH2) of adjacent disks among the plurality of disks (110a, 110b, 110c) may overlap each other. Also, the second upper hole (UH2) and the first lower hole (DH1) of adjacent disks among the plurality of disks (110a, 110b, 110c) may overlap each other.

[0050] For example, as illustrated in FIG. 6, the first upper hole (UH1) of the first disk (110a) and the second lower hole (DH2) of the second disk (110b) overlap each other, and the first upper hole (UH1) of the second disk (110b) and the second lower hole (DH2) of the third disk (110c) may overlap each other. Also, the second upper hole (UH2) of the first disk (110a) and the first lower hole (DH1) of the second disk (110b) overlap each other, and the second upper hole (UH2) of the second disk (110b) and the first lower hole (DH1) of the third disk (110c) may overlap each other.

[0051] The base (200) supports the cage (100) and may have an annular shape.

[0052] The base (200) may include a base plate (210) and an inner wall (220) of the base.

[0053] The base plate (210) has a circular shape and may have a circular base center hole (BCH) in the center. The base plate (210) may have a plurality of rectangular base holes (BH) penetrating the base plate (210). The base holes (BH) may include a first base hole (BH1) that overlaps with a first lower hole (DH1), and a second base hole (BH2) that is spaced apart from the first base hole (BH1), communicates with the inner wall (220) of the base and the outer surface of the base plate (210), and overlaps with a second lower hole (DH2).

[0054] The base plate (210) may have a first base partition (210a) that divides the first base hole (BH1) into two spaces, and a second base partition (210b) that divides the second base hole (BH2) into three spaces. The adjacent first base partition (210a) and second base partition (210b) may be arranged staggered relative to each other.

[0055] The inner wall (220) of the base can be extended vertically from the inner edge of the base plate (210).

[0056] At this time, the base hole (BH) may overlap with the lower hole (DH) to form a stepped hole (SH). That is, the first base hole (BH1) overlaps with the first lower hole (DH1), and the second base hole (BH2) overlaps with the second lower hole (DH2). The first base partition (210a) dividing the first base hole (BH1) and the first lower partition (11a) dividing the first lower hole (DH1) are positioned in an alternating manner, and the second base partition (210b) dividing the second base hole (BH2) and the second lower partition (11b) dividing the second lower hole (DH2) are positioned in an alternating manner, thereby forming a stepped hole (SH) having a stepped shape.

[0057] Accordingly, a pressure reduction trim (TR) according to one embodiment of the present invention comprises a cage (100) and a base (200) having a plurality of stepped holes (SH) of a stepped shape, thereby allowing the fluid to be reduced in steps and the fluid flow to be uniformly dispersed during pressure reduction. Therefore, the durability of the pressure reduction trim (TR) can be improved.

[0058] The cage cover (300) can cover the cage (100). The cage cover (300) may have a cover center hole (CCH) in the center. The cover center hole (CCH) may overlap with an upper center hole (UCH), a lower center hole (DCH), and a base center hole (BCH). These cover center hole (CCH), upper center hole (UCH), lower center hole (DCH), and base center hole (BCH) together form a center hole (CH).

[0059] A pair of fixing pins (400) can be inserted into the cage (100) and the base (200) to align and fix the cage (100) and the base (200).

[0060] The base (200) and the disk (110) may have a pair of pin holes (PH) through which a pair of fixing pins (400) pass.

[0061] As such, the pressure reduction trim (TR) according to one embodiment of the present invention includes a pair of fixing pins (400) that are inserted into the cage (100) and base (200) to align and fix the cage (100) and base (200), thereby making assembly of the pressure reduction trim easy, and thus making replacement and maintenance of the pressure reduction trim easy.

[0062] Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto and can be implemented with various modifications within the scope of the claims, the detailed description of the invention, and the attached drawings, and it is obvious that such modifications also fall within the scope of the present invention. Explanation of the symbols

[0063] BD: Valve body TR: Pressure relief trim 100: Cage 110: Disc 111: Lower disk 112: Upper disk 11: Bottom plate 12: Lower outer wall 21: Top plate 22: Upper inner wall 200: Bass 210: Bass plate 220: Base inner wall 300: Cage cover 400: Fixing pin

Claims

Claim 1 A cage (100) comprising a plurality of stacked annular disks (110, 110a, 110b, 110c); an annular base (200) supporting the cage (100); and a cage cover (300) covering the cage (100); wherein the cage (100) has a plurality of stepped holes (SH) having a stepped shape that provide a fluid depressurization path, and each of the plurality of disks (110, 110a, 110b, 110c) includes a lower disk (111) and an upper disk (112) that are joined together vertically, and the lower disk (111) includes a lower plate (11) having a lower central hole (DCH) and a lower outer wall (12) extending vertically from the outer edge of the lower plate (11), the lower plate (11) has a plurality of lower holes (DH) penetrating the lower plate (11), and the upper disk (112) includes an upper plate (21) having an upper central hole (UCH) and an upper inner wall (22) extending vertically from the inner edge of the upper plate (21), and Pressure reduction trim, characterized in that the upper plate (21) has a plurality of upper holes (UH) penetrating the upper plate (21), and the lower holes (DH) and the upper holes (UH) overlap each other to form the stepped holes (SH). Claim 2 A pressure reduction trim according to claim 1, further comprising a pair of fixing pins (400) inserted into the base (200) and the cage (100) to align and fix the base (200) and the cage (100). Claim 3 In claim 2, the pressure reduction trim is characterized in that the base (200) and the disk (110, 110a, 110b, 110c) have a pair of pin holes (PH) through which the fixing pin (400) passes. Claim 4 delete Claim 5 In claim 1, the lower hole (DH) comprises a first lower hole (DH1) communicating with the lower outer wall (12) and a second lower hole (DH2) positioned spaced apart from the first lower hole (DH1) and communicating with the inner surface of the lower plate (11); the upper hole (UH) comprises a first upper hole (UH1) communicating with the outer surface of the upper plate (21) and a second upper hole (UH2) positioned spaced apart from the first upper hole (UH1) and communicating with the upper inner wall (22) of the upper disk (112); wherein the first lower hole (DH1) overlaps with the first upper hole (UH1) and the second lower hole (DH2) overlaps with the second upper hole (UH2), characterized by a pressure reduction trim. Claim 6 In claim 5, the lower plate (11) has a first lower partition (11a) that divides the first lower hole (DH1) and a second lower partition (11b) that divides the second lower hole (DH2), and the upper plate (21) has a first upper partition (21a) that divides the first upper hole (UH1) and a second upper partition (21b) that divides the second upper hole (UH2), wherein the first lower partition (11a) and the first upper partition (21a) are positioned staggered from each other, and the second lower partition (11b) and the second upper partition (21b) are positioned staggered from each other, characterized in that the pressure reduction trim. Claim 7 In claim 6, the first upper hole (UH1) and the second lower hole (DH2) between adjacent disks among the plurality of disks (110, 110a, 110b, 110c) overlap each other, and the second upper hole (UH2) and the first lower hole (DH1) between adjacent disks overlap each other, characterized by a pressure reduction trim. Claim 8 In claim 7, the base (200) comprises a base plate (210) having a base central hole (BCH) and a base inner wall (220) extending vertically from the inner edge of the base plate (210), wherein the base plate (210) has a plurality of base holes (BH) penetrating the base plate (210), and the base holes (BH) overlap with the lower holes (DH), characterized by a pressure reduction trim. Claim 9 In claim 8, the pressure reduction trim is characterized in that the base hole (BH) includes a first base hole (BH1) that overlaps with the first lower hole (DH1) and a second base hole (BH2) that is spaced apart from the first base hole (BH1), communicates with the outer surface of the base plate (210), and overlaps with the second lower hole (DH2). Claim 10 In claim 9, the base plate (210) has a first base bulkhead (210a) that divides the first base hole (BH1) and a second base bulkhead (210b) that divides the second base hole (BH2), wherein the first base bulkhead (210a) and the first lower bulkhead (11a) are positioned staggered from each other, and the second base bulkhead (210b) and the second lower bulkhead (11b) are positioned staggered from each other, characterized in that the pressure reduction trim. Claim 11 A Joule-Thomson valve comprising: a valve body (BD) having a fluid flow passage (BD1); and a pressure reduction trim (TR) installed inside the fluid flow passage (BD1) of the valve body (BD) and reducing the pressure of the fluid to cool the fluid, wherein the pressure reduction trim (TR) is a pressure reduction trim according to any one of claims 1 to 3 and claims 5 to 10.

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