Cooling device, guide jig, and inspection method

Abstract

This cooling device comprises: a shell having a shell body and an end plate that blocks an opening at an end portion of the shell body; a cooler disposed inside the shell body; and a lid part that is attachable to and detachable from an end portion of the shell body in the axial direction. The end plate has: an end plate body that is in the shape of a plate orthogonal to the axial direction and blocks the opening of the shell body; a plurality of pipe-fixing holes that fix a plurality of cooling pipes in a state of having the end portions of the cooling pipes in the axial direction inserted therein; an inspection hole that is formed alongside the pipe-fixing holes and is in communication with the inside of the shell body; and a blocking member that is attachable to and detachable from the inspection hole and blocks the inspection hole.

Description

Cooling device, guide jig, and inspection method

[0001] This application claims priority to Japanese Patent Application No. 2023-222572, filed on December 28, 2023, the contents of which are incorporated herein by reference.

[0002] When a fluid is compressed in a compressor, the temperature of the compressed fluid increases. In a multi-stage compressor, when the compressed fluid is sent to another compressor in a subsequent stage, a cooling device is sometimes used to cool the fluid in order to increase the compression efficiency of the fluid in the subsequent compressor. An example of such a cooling device is a shell-and-tube heat exchanger, in which a group of cooling tubes is arranged inside a shell. In such a heat exchanger, the inside of the shell needs to be inspected.

[0003] For example, Patent Document 1 describes an internal pipe cleaning and flaw detection inspection device that cleans the inner surfaces of heat-conductive tubes of a large heat exchanger and performs flaw detection inspections of the tubes. This device includes a flexible tube with an outer diameter smaller than the inner diameter of the tube and is flexible, an internal pipe cleaner and a flaw detection detector attached to the tip of the flexible tube, and a cable that is inserted into the flexible tube and connected to the detector.

[0004] Japanese Patent Application Laid-Open No. 2000-180093

[0005] Inspecting a shell-and-tube heat exchanger requires removing a cover disposed at the end of the shell to open the interior of the shell. The device disclosed in Patent Document 1 can inspect the interior of the cooling pipes, but cannot inspect the condition of the outer circumferential surfaces of the tubes. Inspecting the condition of the outer circumferential surfaces of the tubes requires pulling out and disassembling a bundle, which includes a group of cooling pipes and other components attached to the bundle, from the shell. Actual heat exchangers are often huge, and the task of pulling out a bundle from the shell requires a great deal of effort. Therefore, there is a need for an easy way to inspect the outer circumferential surfaces of the cooling pipes inside the shell.

[0006] The present disclosure provides a cooling device, a guide jig, and an inspection method that can easily inspect the outer surface of a cooling pipe inside a shell.

[0007] A cooling device according to the present disclosure includes a shell having a cylindrical shell body extending about an axis, an inlet nozzle that feeds a fluid into the shell body, an outlet nozzle that is disposed apart from the inlet nozzle in an axial direction along which the axis extends and feeds the fluid inside the shell body to the outside, and an end plate that closes an opening at an end of the shell body in the axial direction, a cooler that is disposed inside the shell body and is capable of cooling by circulating the fluid that flows from the inlet nozzle toward the outlet nozzle inside the shell body, and a lid that is attachable to and detachable from an end of the shell body in the axial direction, the cooling pipes extend in an axial direction and have a cooling medium flowing through them; and a plurality of support plates each having a plate shape perpendicular to the axial direction, arranged at intervals in the axial direction, and having a plurality of pipe insertion holes through which the cooling pipes are inserted and fixed in place in the axial direction. The end plate has an end plate body having a plate shape perpendicular to the axial direction and closing the opening of the shell body, a plurality of pipe fixing holes formed in the end plate body and through which the axial ends of the plurality of cooling pipes are inserted and fixed, an inspection hole formed in the end plate body alongside the pipe fixing holes and communicating with the inside of the shell body, and a closing member that is attachable to and detachable from the inspection hole and closes the inspection hole.

[0008] In addition, the guide jig of the present disclosure is a guide jig that is inserted into the inspection hole of the cooling device and guides an inspection cable having a sensor at its tip into the interior of the shell body, and is formed in a tubular shape that allows the inspection cable to be inserted inside when inserted into the inspection hole.

[0009] In addition, the inspection method disclosed herein is an inspection method for inspecting the cooling device using an inspection cable with a sensor located at its tip, and includes the steps of removing the blocking member from the inspection hole and inserting the inspection cable into the inspection hole to inspect the inside of the shell body.

[0010] According to the cooling device, guide jig, and inspection method of the present disclosure, the outer surface of the cooling pipe inside the shell can be easily inspected.

[0011] FIG. 1 is a diagram showing a schematic configuration of a compressor system equipped with a cooling device according to the present embodiment; FIG. 2 is a perspective view showing the appearance of the cooling device according to the present embodiment; FIG. 3 is a cross-sectional view of a main part as viewed in the width direction showing the inside of a shell according to the present embodiment; FIG. 4 is a cross-sectional view of a main part as viewed in the axial direction showing the inside of a shell according to the present embodiment; FIG. 5 is a side view showing an end of a shell main body with a lid removed according to the present embodiment; FIG. 6 is a cross-sectional view of a main part as viewed in the width direction showing the state of a guiding jig according to the present embodiment; FIG. 7 is a flow chart showing an inspection method according to the present embodiment; FIG. 8 is a cross-sectional view of a main part as viewed in the width direction showing the inside of a shell according to a first modified example; FIG. 9 is a cross-sectional view of a main part as viewed in the width direction showing the inside of a shell according to a second modified example.

[0012] <Embodiment> Hereinafter, an embodiment for carrying out a cooling device 1 according to the present disclosure will be described with reference to the accompanying drawings. However, the present disclosure is not limited to only this embodiment.

[0013] (Configuration of Compressor System) As shown in Fig. 1 , the cooling device 1 in this embodiment is provided in a compressor system 8. The compressor system 8 includes a plurality of compressors 9 provided in series and the cooling device 1. The plurality of compressors 9 are connected in series. In this embodiment, for example, two compressors 9 are provided. Note that the number of compressors 9 provided in the compressor system 8 may be three or more.

[0014] The fluid G to be compressed in the compressor system 8 is compressed by a front-stage compressor 9A and then sent to a rear-stage compressor 9B. The fluid G compressed by the front-stage compressor 9A is further compressed by the rear-stage compressor 9B. The cooling device 1 is disposed between the front-stage compressor 9A and the rear-stage compressor 9B. The cooling device 1 is connected to the outlet side Dw2 of the front-stage compressor 9A via a front-stage connecting pipe 10A. The cooling device 1 is connected to the inlet side Dw1 of the rear-stage compressor 9B via a rear-stage connecting pipe 10B.

[0015] (Configuration of the Cooling Device) The cooling device 1 cools a gaseous fluid G compressed by a compressor 9A in a first stage. The cooling device 1 reduces the power required to drive a compressor 9B in a second stage by intermediately cooling the fluid G during the compression process. In this embodiment, the fluid G cooled by the cooling device 1 is, for example, carbon dioxide (CO2) gas containing moisture. The fluid G cooled by the cooling device 1 is not limited to carbon dioxide gas, and may be other gases such as air or nitrogen. The cooling device 1 is a shell-and-tube heat exchanger. As shown in FIGS. 2 and 3 , the cooling device 1 of this embodiment mainly includes a shell 2, a cooler 3, a partition member 5, a perforated plate 4, a demister 6, and a lid 7.

[0016] 2, the shell 2 has a hollow structure and includes a shell body 21, an inlet nozzle 24, an outlet nozzle 25, and an end plate 26.

[0017] The shell body 21 is formed in a cylindrical shape extending about the axis O. As shown in FIG. 3 , the shell body 21 has an opening 211 formed at an end in the axial direction Da so that one side in the axial direction Da along which the axis O extends is open. In the shell body 21 of this embodiment, the opening 211 is formed on a first side Da1 in the axial direction Da. The shell body 21 is disposed so that the axis O coincides with the horizontal direction. Note that it is preferable that the inner diameter of the shell 2 be as large as possible to suppress drift of the fluid G inside the shell 2.

[0018] As shown in FIG. 2 , an inlet nozzle 24 and an outlet nozzle 25 are integrally connected to the shell body 21. The inlet nozzle 24 and the outlet nozzle 25 are arranged at an interval in the axial direction Da, in which the axis O extends. The inlet nozzle 24 and the outlet nozzle 25 are arranged above the horizontally arranged shell body 21 in the vertical direction Dv. The inlet nozzle 24 and the outlet nozzle 25 are formed in a cylindrical shape extending upward in the vertical direction Dv from the top of the shell body 21. The inlet nozzle 24 is connected to the upstream connecting pipe 10A. The outlet nozzle 25 is connected to the downstream connecting pipe 10B. The lower ends of the inlet nozzle 24 and the outlet nozzle 25 open at the inner circumferential surface of the shell body 21 so as to communicate with the interior of the shell body 21.

[0019] In this embodiment, the side on which the inlet nozzle 24 is arranged relative to the outlet nozzle 25 is the first side Da1 in the axial direction Da. Conversely, the side on which the outlet nozzle 25 is arranged relative to the inlet nozzle 24 is the second side Da2 in the axial direction Da.

[0020] 3 , the end plate 26 closes the opening 211 at the end of the shell body 21 in the axial direction Da. The end plate 26 is detachable from the shell body 21. By moving the end plate 26 in the axial direction Da relative to the shell body 21, the cooler 3 can be moved at the same time. The detailed configuration of the end plate 26 will be described later.

[0021] (Configuration of Cooler) The cooler 3 is disposed inside the shell body 21. The cooler 3 is capable of cooling by circulating the fluid G flowing from the inlet nozzle 24 toward the outlet nozzle 25 inside the cooler 3. The cooler 3 of this embodiment includes a tube group 31, a first plate portion 32, and a second plate portion 33. The cooler 3 as a whole has a rectangular parallelepiped shape extending in the axial direction Da.

[0022] The tube group 31 includes a plurality of cooling pipes 35 and a support plate 37. Each cooling pipe 35 extends in the axial direction Da within the shell main body 21. The cooling pipes 35 are arranged at intervals in the vertical direction Dv and in the width direction Dw (a direction intersecting the axis O in this embodiment), which is perpendicular to the axial direction Da. The cooling pipes 35 are arranged in a staggered pattern so that adjacent cooling pipes 35 in the width direction Dw have different installation heights in the vertical direction Dv. The cooling pipes 35 are folded back in a U-shape on a first side Da1 in the axial direction Da within the shell main body 21. Each cooling pipe 35 has a diameter of, for example, 30 mm or less. A cooling medium, for example, water, is supplied into each cooling pipe 35. Within each cooling pipe 35, the cooling medium, water, flows from the first side Da1 in the axial direction Da to the second side Da2, changes its flow direction so as to turn back at the end of the second side Da2 in the axial direction Da, and then flows from the second side Da2 in the axial direction Da to the first side Da1.

[0023] The cooling pipes 35 are supported at intervals in the axial direction Da by a plurality of support plates 37. The support plates 37 are formed in a flat plate shape having a surface perpendicular to the axial direction Da. The support plates 37 have a plurality of pipe insertion holes 371 and at least one support inspection hole 372.

[0024] The pipe insertion holes 371 fix the cooling pipes 35 while they are inserted in the axial direction Da. Each pipe insertion hole 371 penetrates the support plate 37 in the axial direction Da (plate thickness direction). Each cooling pipe 35 is expanded and joined or inserted into each pipe insertion hole 371 so as to make sliding contact with the pipe insertion holes 371. For this reason, the multiple pipe insertion holes 371 are arranged in a staggered pattern according to the layout of the multiple cooling pipes 35.

[0025] At least one support inspection hole 372 is formed in the support plate 37. In this embodiment, the same number of support inspection holes 372 as the inspection holes 263 described below are formed. The support inspection hole 372 is formed side by side with the pipe insertion hole 371. The support inspection hole 372 penetrates the support plate 37 in the axial direction Da. When viewed from the axial direction Da, the support inspection hole 372 is aligned with but spaced apart from the position where the pipe insertion hole 371 is located. The support inspection hole 372 is formed with a larger diameter than the pipe insertion hole 371. When viewed from the axial direction Da, the support inspection hole 372 is formed at a position on the support plate 37 that overlaps with the inspection hole 263.

[0026] The first plate portion 32 is disposed above the tube group 31 in the vertical direction Dv. The first plate portion 32 is disposed in a position close to the inlet nozzle 24 relative to the plurality of cooling pipes 35. As a result, the first plate portion 32 is disposed in a position facing the inlet nozzle 24 and the outlet nozzle 25 relative to the tube group 31. The first plate portion 32 is flat and extends along a plane (horizontal plane) perpendicular to the vertical direction Dv. The first plate portion 32 is formed in a rectangular shape when viewed from the vertical direction Dv perpendicular to the axial direction Da. The first plate portion 32 is disposed so as to cover the entire tube group 31 from above in the vertical direction Dv.

[0027] The second plate portion 33 is disposed on the opposite side of the first plate portion 32 with the cooling pipes 35 interposed therebetween. In other words, the second plate portion 33 is disposed below the tube group 31 in the vertical direction Dv. The second plate portion 33 is flat and extends along a plane (horizontal plane) perpendicular to the vertical direction Dv. The second plate portion 33 is formed in a rectangular shape when viewed from the vertical direction Dv. The second plate portion 33 is disposed so as to cover the entire tube group 31 from below in the vertical direction Dv.

[0028] 4 , an inlet-side opening 3i and an outlet-side opening 3o are formed between the first plate portion 32 and the second plate portion 33, which are arranged above and below in the vertical direction Dv. The inlet-side opening 3i supplies the fluid G to the plurality of cooling pipes 35. The outlet-side opening 3o is formed on the opposite side in the width direction Dw, across the plurality of cooling pipes 35. The outlet-side opening 3o discharges the fluid G to the outside of the cooler 3 after contacting the plurality of cooling pipes 35.

[0029] In the cooler 3, the fluid G passes between the first plate portion 32 and the second plate portion 33, which are arranged above and below in the vertical direction Dv, from the inlet-side opening 3i to the outlet-side opening 3o, and comes into contact with the cooling tubes 35 of the tube group 31. Here, the fluid G flows between the first plate portion 32 and the second plate portion 33 along a width direction Dw perpendicular to the axial direction Da. In other words, the width direction Dw perpendicular to the axial direction Da coincides with the flow direction of the fluid G in the cooler 3. In the following description, in the width direction Dw, the side where the fluid G flows into the cooler 3 and where the inlet-side opening 3i is formed for the tube group 31 is referred to as the inlet side (one side) Dw1. Furthermore, the side where the fluid G flows out of the cooler 3 and where the outlet-side opening 3o is formed for the tube group 31 is referred to as the outlet side (other side) Dw2. Therefore, between the first plate portion 32 and the second plate portion 33, the fluid G flows from the inlet side Dw1 to the outlet side Dw2 in the width direction Dw.

[0030] An end portion of the first plate portion 32 on the inlet side Dw1 in the width direction Dw is disposed with a gap between it and the shell main body 21. An end portion of the first plate portion 32 on the outlet side Dw2 in the width direction Dw is disposed with a gap between it and the shell main body 21.

[0031] Similarly, an end portion of the second plate portion 33 on the inlet side Dw1 in the width direction Dw is disposed with a gap between it and the shell main body 21. An end portion of the second plate portion 33 on the outlet side Dw2 in the width direction Dw is disposed with a gap between it and the shell main body 21.

[0032] (Configuration of Extension Portion) The cooler 3 further includes an extension portion 34. The extension portion 34 extends from an end of the second plate portion 33 toward the shell main body 21. In this embodiment, the extension portion 34 has a flat plate shape. The extension portion 34 extends from an end of the second plate portion 33 on the inlet side Dw1 in the width direction Dw toward the inner circumferential surface of the shell main body 21. The extension portion 34 extends from the end of the second plate portion 33 downward in the vertical direction Dv, sloping toward the inlet side Dw1 in the width direction Dw. The tip of the second guide portion 53 contacts the lower inner circumferential surface 21f of the shell main body 21. As a result, the extension portion 34 is connected to the second plate portion 33 and partitions the internal space of the shell main body 21. Specifically, the extension portion 34 prevents the fluid G from flowing downward in the vertical direction Dv relative to the second plate portion 33. Therefore, the fluid G that reaches the extension portion 34 is guided to the inlet-side opening 3i without being directed downward in the vertical direction Dv relative to the second plate portion 33. In addition, the extension portion 34 is movable integrally with the cooler 3, and together with the cooler 3, constitutes part of the bundle.

[0033] (Configuration of Partition Member) The partition member 5 is fixed to the first plate portion 32. The partition member 5 extends on the first plate portion 32. The partition member 5 separates the space between the cooler 3 and the inner circumferential surface of the shell main body 21. Specifically, the partition member 5 separates the space between the cooler 3 and the inner circumferential surface of the shell main body 21 into a space communicating with the inlet nozzle 24 and a space communicating with the outlet nozzle 25. The partition member 5 is fixed to the first plate portion 32. Therefore, the partition member 5 is movable integrally with the cooler 3 and, together with the cooler 3, forms part of the bundle.

[0034] (Configuration of Perforated Plate) The perforated plate 4 is arranged to cover the inlet-side opening 3i. The perforated plate 4 is arranged facing the inlet-side opening 3i located on the inlet side Dw1 of the cooler 3 in the width direction Dw. In other words, the perforated plate 4 covers the opening in the cooler 3 through which the fluid G flows. The perforated plate 4 is arranged to cover the tube bank 31 from the inlet side Dw1 in the width direction Dw. The perforated plate 4 is arranged between the first plate portion 32 and the second plate portion 33 in the vertical direction Dv. The perforated plate 4 is formed in a rectangular shape when viewed from the width direction Dw. The perforated plate 4 has a plurality of holes 41 formed throughout its entirety. The perforated plate 4 is fixed to the first plate portion 32 and the second plate portion 33. Therefore, the perforated plate 4 is movable integrally with the cooler 3 and, together with the cooler 3, constitutes part of the bundle.

[0035] (Configuration of the demister) The demister 6 is arranged to cover the outlet-side opening 3o. The demister 6 collects liquid that is condensed as the fluid G flows through the demister 6 after contacting the plurality of cooling pipes 35. The demister 6 is arranged to face the outlet-side opening 3o located on the outlet side Dw2 in the width direction Dw of the cooler 3. In other words, the demister 6 covers the opening in the cooler 3 through which the fluid G flows out. The demister 6 is arranged to cover the tube group 31 from the outlet side Dw2 in the width direction Dw. The demister 6 is arranged between the first plate portion 32 and the second plate portion 33 in the vertical direction Dv. The demister 6 is fixed to the first plate portion 32 and the second plate portion 33. Therefore, the demister 6 is movable integrally with the cooler 3 and, together with the cooler 3, constitutes part of the bundle.

[0036] (Detailed Structure of End Plate) As shown in Figures 3 and 5, the end plate 26 of this embodiment has an end plate body 261, a plurality of pipe fixing holes 262, at least one inspection hole 263, and a blocking member 264.

[0037] The end plate body 261 is formed in a flat plate shape that extends perpendicular to the axial direction Da. The end plate body 261 is detachable from the shell body 21 with fastening members (not shown) such as bolts. The first plate portion and the second plate portion 33 are fixed to the surface of the end plate body 261 facing the second side Da2 in the axial direction Da (the inner side of the shell body 21). By being fixed to the shell body 21, the end plate body 261 closes the opening 211 of the shell body 21 in the axial direction Da.

[0038] A plurality of tube fixing holes 262 are formed in the end plate body 261. The tube fixing holes 262 penetrate the end plate body 261 in the axial direction Da, connecting the inside and outside of the shell body 21. The tube fixing holes 262 fix the ends of the plurality of cooling pipes 35 in the axial direction Da while they are inserted through the tube fixing holes 262. By fixing the plurality of cooling pipes 35 to the plurality of tube fixing holes 262, it is possible to move the cooler 3 by moving the end plate body 261 in the axial direction Da relative to the shell body 21. The plurality of tube fixing holes 262 are formed at positions where the plurality of cooling pipes 35 are arranged and at positions where the tube insertion holes 371 are formed, when viewed from the axial direction Da.

[0039] At least one inspection hole 263 (three in this embodiment) is formed in the end plate body 261. The inspection hole 263 is formed alongside the pipe fixing hole 262. The inspection hole 263 penetrates the end plate body 261 in the axial direction Da and connects the interior and exterior of the shell body 21. When viewed from the axial direction Da, the inspection hole 263 is aligned with and spaced apart from the position of the pipe fixing hole 262. No cooling pipe 35 is fixed to the inspection hole 263. The inspection hole 263 is formed with a larger diameter than the pipe fixing hole 262. The inspection hole 263 has the same diameter as the support inspection hole 372. When viewed from the axial direction Da, the inspection hole 263 is positioned near the position where the fluid G flows in and the second plate portion 33. Therefore, in this embodiment, the inspection hole 263 is formed at least at the end of the inlet side Dw1 in the width direction Dw and directly above the second plate portion 33 in the vertical direction Dv.

[0040] The blocking members 264 are capable of blocking the inspection holes 263. One blocking member 264 corresponds to one inspection hole 263. The blocking members 264 are formed of a corrosion-resistant material (e.g., stainless steel). The blocking member 264 of this embodiment has a screw shaft 267, a head 268, and a seal member 269.

[0041] The screw shaft 267 can be fastened to the inspection hole 263 while inserted into the inspection hole 263. The head 268 is connected to the end of the screw shaft 267 and has a larger diameter than the screw shaft 267. The head 268 is formed with a size that prevents it from being inserted into the inspection hole 263. The seal member 269 can seal between the head 268 and the end plate 26. The seal member 269 is, for example, a gasket that seals between the head 268 and the end plate body 261.

[0042] The lid portion 7 is detachably attached to the end of the shell body 21 in the axial direction Da. The lid portion 7 is formed in a cylindrical shape with a bottom. A space (water chamber) for storing a cooling medium is formed between the lid portion 7 and a surface of the end plate body 261 facing the first side Da1 in the axial direction Da. This space is partitioned into a space for supplying the cooling medium to the plurality of cooling pipes 35 and a space for storing the cooling medium discharged from the plurality of cooling pipes 35. A pipe for supplying the cooling medium and a pipe for discharging the cooling medium are connected to the lid portion 7. The lid portion 7 is detachably attached to the end plate body 261 by fastening members (not shown) such as bolts.

[0043] (Inspection Method Procedure) Next, an inspection method S10 for the cooling device 1 will be described. In the inspection method S10 of this embodiment, as shown in FIG. 6 , the interior of the shell body 21 of the cooling device 1 is inspected using an inspection cable 100 having a sensor 110 at its tip. In the inspection method S10, the wear state of the cooling tube 35 is inspected based on the condition of the outer surface of the cooling tube 35. The inspection cable 100 is capable of photographing the interior of the shell body 21. The inspection cable 100 is, for example, a borescope (industrial endoscope) used to observe and inspect deep areas that cannot be directly observed with the naked eye. The sensor 110 is, for example, a sensor module incorporating a semiconductor element (solid-state imaging element) such as a CCD image sensor or a CMOS image sensor. The inspection cable 100 is flexible and can be bent in any direction by external manipulation. The inspection cable 100 has a cross-section large enough to be inserted through the inspection hole 263 and the support inspection hole 372.

[0044] The inspection cable 100 may be any cable that has a bendable structure, and may be, for example, a snake-like robot having a multi-joint structure in which multiple highly flexible members are connected.

[0045] In inspection method S10, the end plate body 261 is not removed from the shell body 21. Inspection method S10 is performed with the cooling medium discharged from the interior of all of the cooling pipes 35. Furthermore, inspection method S10 is performed with the fluid G also discharged from the interior of the shell body 21. In addition, in inspection method S10 of this embodiment, a guide jig 200 is used when inserting the inspection cable 100 into the interior of the shell body 21 through the inspection hole 263.

[0046] (Configuration of the Guide Jig) Here, the guide jig 200 will be described. The guide jig 200 is a jig for guiding the inspection cable 100 into the interior of the shell main body 21 by being inserted into the inspection hole 263. The guide jig 200 is formed in a tubular shape that allows the inspection cable 100 to pass through it when inserted into the inspection hole 263. The guide jig 200 of this embodiment is formed in a cylindrical shape. The guide jig 200 has sufficient rigidity to prevent bending under its own weight when inserted into the inspection hole 263. The guide jig 200 also opens in a direction perpendicular to the axial direction Da at a predetermined section from the tip end that is inserted into the shell main body 21. The opening 201 of the guide jig 200 is formed to be large enough to allow the sensor 110 to move. When viewed from the extension direction, the opening 201 of the guide jig 200 is formed so that an upper half perpendicular to the extension direction is open. The length of the guide jig 200 in the axial direction Da is set to be equal to the length of the shell main body 21. Furthermore, a plurality of scales 202 are formed at regular intervals on the outer peripheral surface of the guide jig 200. The plurality of scales 202 are formed at intervals of several tens of centimeters, for example.

[0047] 7 , in the inspection method S10, first, the blocking member 264 is removed from the inspection hole 263 (step S1). In this embodiment, first, the lid portion 7 is removed from the end plate main body 261 fixed to the shell main body 21. This makes it possible to visually inspect the blocking member 264 with the head portion 268 exposed to the outside. Then, the blocking member 264 is removed from the inspection hole 263.

[0048] Second, the guide jig 200 is inserted into the inspection hole 263 (step S2). The guide jig 200 is inserted into the inspection hole 263 so that the tip end of the guide jig 200 is inserted inside the shell main body 21 and the opposite end is positioned outside the shell main body 21.

[0049] Third, the inspection cable 100 is inserted into the inspection hole 263 to inspect the interior of the shell body 21 (step S3). Specifically, the inspection cable 100 is inserted into the guide jig 200, which is inserted into the inspection hole 263. The inspection cable 100 is inserted until the sensor 110 protrudes from the opening 201 of the guide jig 200. The inspection cable 100, along with the guide jig 200, is then inserted deep into the shell body 21 to the position of the inspection target. However, even when the inspection cable 100 is inserted deep into the shell body 21, the end of the guide jig 200 remains positioned outside the shell body 21. This allows the sensor 110 to reach the position of the inspection target, and the inspection is performed. After the inspection is completed, the blocking member 264 is attached to the inspection hole 263. The lid 7 is then fixed to the end plate 26.

[0050] (Operation and Effect) In the cooling device 1 configured as described above, the end plate 26 closing the opening 211 at the end of the shell body 21 has a plurality of pipe fixing holes 262 for fixing the cooling pipes 35. An inspection hole 263 is also formed alongside the pipe fixing holes 262. Therefore, the internal space of the shell body 21 that communicates with the inspection hole 263 in the axial direction Da is aligned with the outer circumferential surface of the cooling pipe 35. Therefore, in the inspection method S10 using such an inspection hole 263, the closing member 264 closing the inspection hole 263 is removed, and the inspection cable 100 is inserted through the inspection hole 263, allowing the sensor 110 to be inserted very close to the outer circumferential surface of the cooling surface. In other words, the cooler 3 having a plurality of cooling pipes 35 can be inspected without being removed from the shell body 21. Generally, when inspecting the condition of the multiple cooling pipes 35, it is necessary to remove the bundle including the cooler 3, perforated plate 4, partition member 5, demister 6, and extension portion 34 from the shell body 21 to the outside, and then further remove the perforated plate 4 and demister 6 to disassemble the cooler 3 so that the cooling pipes 35 can be visually inspected. However, in this embodiment, it is not necessary to disassemble the cooler 3. This makes it possible to easily inspect the outer surfaces of the cooling pipes 35 inside the support plate 37 and the shell 2.

[0051] The support plate 37 also has a support inspection hole 372 formed at a position overlapping the inspection hole 263 when viewed from the axial direction Da. The support plate 37 is arranged at intervals in the axial direction Da inside the shell main body 21 to support the cooling pipe 35. By inserting the inspection cable 100 through the inspection hole 263 and passing it through the support inspection hole 372, the sensor 110 can be inserted into a position very close to the outer circumferential surface of the cooling surface, even if it is far from the inspection hole 263 in the axial direction Da, without being obstructed by the support plate 37. This allows for easy inspection deep inside the shell main body 21.

[0052] The inspection hole 263 is larger than the pipe fixing hole 262. The inspection hole 263 and the support inspection hole 372 have the same diameter. Therefore, the inspection cable 100 can be stably inserted into the shell body 21.

[0053] Furthermore, the flow velocity of the fluid G that flows into the inside of the shell body 21 from the inlet nozzle 24 increases the farther it is from the inlet nozzle 24. Therefore, at positions where the fluid G flows in away from the inlet nozzle 24, the fluid G, which flows at a high velocity, collides with the cooling pipe 35, causing greater wear on the cooling pipe 35. In contrast, the inspection hole 263 is disposed at a position where the fluid G flows in and close to the second plate portion 33, as viewed from the axial direction Da. Therefore, the cooling pipe 35, which is most worn and requires replacement the earliest, can be easily inspected via the inspection hole 263.

[0054] The blocking member 264 also has a threaded shaft 267 that is fastened to the inspection hole 263, a head 268 that is larger in diameter than the threaded shaft 267, and a seal member 269 that can seal between the head 268 and the end plate 26. The threaded shaft 267 allows the blocking member 264 to be easily fixed to the end plate 26 by simply inserting it into the inspection hole 263. Furthermore, because the head 268 has a larger diameter than the threaded shaft 267, the blocking member 264 can be prevented from falling off from the inspection hole 263 into the interior of the shell body 21. Furthermore, the seal member 269 can prevent the fluid G from leaking from the inspection hole 263 when the cooling device 1 is operated with the blocking member 264 closing the inspection hole 263 and supplying the fluid G into the shell body 21.

[0055] Furthermore, when performing an inspection, a guide jig 200 is inserted into the inspection hole 263. The guide jig 200 is formed in a tubular shape that allows the inspection cable 100 to be inserted therethrough when the guide jig 200 is inserted into the inspection hole 263. Therefore, when the inspection cable 100 is inserted through the inspection hole 263, damage to the inspection hole 263 can be prevented.

[0056] Furthermore, the guiding jig 200 opens in a direction perpendicular to the axial direction Da in a predetermined section from the tip end portion that is inserted into the shell main body 21. Therefore, the sensor 110 at the tip end of the inspection cable 100 inserted into the guiding jig 200 can move freely inside the shell main body 21 in a direction perpendicular to the axial direction Da.

[0057] Furthermore, a scale 202 is formed on the outer peripheral surface of the guide jig 200. Therefore, when the guide jig 200 is inserted into the shell body 21 through the inspection hole 263, it is easy to know how far the guide jig 200 has been inserted into the shell body 21 in the axial direction Da. Therefore, it is also easy to know the position of the sensor 110 of the inspection cable 100 inserted into the shell body 21 via the guide jig 200.

[0058] <First Modification> Next, a cooling device 1A according to a first modification of the present disclosure will be described. In the first modification described below, components common to the above embodiment will be denoted by the same reference numerals in the drawings, and description thereof will be omitted. The first modification differs from the above embodiment in that the interior of the shell 2A can be inspected without removing the lid 7.

[0059] As shown in FIG. 8, the shell 2A of the first modified example further has a shell inspection hole 28 and a shell closing lid 29.

[0060] The shell inspection hole 28 communicates with the interior of the shell main body 21. The shell inspection hole 28 is disposed on the first side Da1 in the axial direction Da relative to the inlet nozzle 24 at a distance. That is, the shell inspection hole 28 is disposed between the end plate 26 and the inlet nozzle 24 in the axial direction Da. The shell inspection hole 28 is disposed above the horizontally disposed shell main body 21 in the vertical direction Dv. The shell inspection hole 28 is formed in a cylindrical shape extending upward in the vertical direction Dv from the top of the shell main body 21 and having a flange at its end. The lower end of the shell inspection hole 28 opens at the inner circumferential surface of the shell main body 21 so as to communicate with the interior of the shell main body 21. The shell inspection hole 28 is formed with a size that allows the inspection cable 100 and the guide jig 200 to pass through.

[0061] The shell closing lid 29 is capable of closing the shell inspection hole 28. The shell closing lid 29 is formed in a flat plate shape. The shell closing lid 29 is detachable from the shell main body 21 by fastening members (not shown) such as bolts. The shell closing lid 29 closes the shell inspection hole 28 by being fixed to the shell main body 21.

[0062] Furthermore, the first plate portion 32A of the first modified example has a plate inspection hole 321 .

[0063] The plate inspection hole 321 communicates with the space communicating with the inlet nozzle 24 and the space between the first plate portion 32, 32A and the second plate portion 33. The plate inspection hole 321 is formed at the same position as the shell inspection hole 28 in the axial direction Da and the width direction Dw. In this embodiment, the plate inspection hole 321 penetrates the first plate portions 32, 32A in the vertical direction Dv. In other words, the plate inspection hole 321 is formed at the same position as the shell inspection hole 28 when viewed from the vertical direction Dv, and thus, together with the shell inspection hole 28, communicates from the outside of the shells 2, 2A to the space between the first plate portion 32A and the second plate portion 33. The plate inspection hole 321 is formed with a size that allows the inspection cable 100 and the guide jig 200 to be inserted therethrough.

[0064] The cooler 3A also has a plate blocking cover 350. The plate blocking cover 350 is capable of blocking the plate inspection hole 321. The plate blocking cover 350 is formed in a flat plate shape. The plate blocking cover 350 is detachable from the first plate portion 32A by fastening members (not shown) such as bolts. The plate blocking cover 350 blocks the plate inspection hole 321 by being fixed to the first plate portion 32A.

[0065] (Effects) When inspecting the cooling device 1A of the first modified example having the above configuration, the cover portion 7 is not removed from the end plate body 261 fixed to the shell body 21. Instead, the shell closing cover 29 is removed from the shell inspection hole 28. This makes the first plate portion 32A inside the shell body 21 visible through the shell inspection hole 28. Then, the plate closing cover 350 is removed from the plate inspection hole 321. As a result, when viewed from the vertical direction Dv, the shell inspection hole 28 and the plate inspection hole 321 are connected, and communication is established from the outside of the shell 2A to the space between the first plate portion 32A and the second plate portion 33, where the cooling pipe 35 is located. This allows the guide jig 200 and the inspection cable 100 to be inserted through the shell inspection hole 28 and the plate inspection hole 321, allowing the sensor 110 to be inserted at a position very close to the outer circumferential surface of the cooling surface. In other words, the outer surfaces of the support plate 37 and the cooling pipes 35 inside the shell 2 can be easily inspected without removing the lid portion 7 or the cooler 3 .

[0066] <Second Modification> Next, a cooling device of a second modification according to the present disclosure will be described. Note that in the second modification described below, components common to the above embodiment will be denoted by the same reference numerals in the drawings, and descriptions thereof will be omitted. The second modification is the same as the first modification in that the interior of the shell 2 can be inspected without removing the lid portion 7A, but differs from the first modification in that an inspection hole is formed in the lid portion 7A rather than the shell 2.

[0067] As shown in FIG. 9, a cover portion 7A of the second modified example has a cover inspection hole 71.

[0068] The lid inspection hole 71 connects the inside and outside of the lid portion 7A. The lid inspection hole 71 penetrates the lid portion 7A in the axial direction Da. The lid inspection hole 71 is formed at the same position as the inspection hole 263 in the vertical direction Dv and the width direction Dw. In other words, the lid inspection hole 71 is formed at the same position as the inspection hole 263 when viewed from the axial direction Da, and together with the inspection hole 263, connects the outside of the shell 2, 2A to the space between the first plate portion 32 and the second plate portion 33. The lid inspection hole 71 is formed in a cylindrical shape extending from the outer surface of the lid portion 7A toward the first side Da1 in the axial direction Da and having a flange at its end. The lid inspection hole 71 is formed to be large enough to allow the inspection cable 100 and the guide jig 200 to pass through.

[0069] The cooler 3 also has an outer lid 750. The outer lid 750 is capable of closing the lid inspection hole 71. The outer lid 750 is formed in a flat plate shape. The outer lid 750 is detachable from the lid portion 7A by fastening members (not shown) such as bolts. The outer lid 750 closes the lid inspection hole 71 by being fixed to the lid portion 7A.

[0070] (Effects) When inspecting the cooling device 1B of the second modified example having the above configuration, the lid 7A is not removed from the end plate body 261 fixed to the shell body 21. Instead, the outer lid 750 is removed from the lid inspection hole 71. This makes the interior of the lid 7A visible through the lid inspection hole 71. The blocking member 264 is then removed from the inspection hole 263. As a result, when viewed from the axial direction Da, the lid inspection hole 71 and the inspection hole 263 are connected, and the space between the first plate portion 32, 32A and the second plate portion 33, where the cooling pipe 35 is located, is connected from the outside of the shell 2. This allows the sensor 110 to be inserted very close to the outer periphery of the cooling surface by inserting the guide jig 200 and the inspection cable 100 through the lid inspection hole 71 and the inspection hole 263. In other words, the outer periphery of the cooling pipe 35 inside the support plate 37 and the shell 2 can be easily inspected without removing the lid 7A or the cooler 3.

[0071] (Other Embodiments) Although the embodiments of the present disclosure have been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like within the scope that does not deviate from the gist of the present disclosure are also included.

[0072] The configuration of the cooling devices 1, 1A, and 1B is not limited to that of the above embodiment. For example, the cooling devices 1, 1A, and 1B may have a structure other than the shells 2, 2A, coolers 3, 3A, partition member 5, perforated plate 4, and demister 6. Furthermore, the cooling devices 1, 1A, and 1B may not have the partition member 5, perforated plate 4, and demister 6. Furthermore, the shells 2, 2A, partition member 5, perforated plate 4, and demister 6 may have a structure other than that of the above embodiment. Therefore, for example, the inlet nozzle 24 may be connected to the shell body 21 in the width direction Dw.

[0073] Furthermore, the arrangement of the plurality of cooling pipes 35 constituting the pipe group 31 is not limited to the arrangement in the above embodiment. For example, the plurality of cooling pipes 35 are not limited to being arranged in a staggered pattern as in the present embodiment, but may be arranged in a grid pattern.

[0074] Furthermore, the number and positions of the inspection holes 263 and the blocking members 264 arranged on the end plate 26 are not limited to the structure of this embodiment. For example, the number and positions of the inspection holes 263 and the blocking members 264 may be set appropriately within a range that does not affect the cooling performance of the cooling devices 1, 1A, and 1B, or according to the locations to be inspected. Therefore, the number and positions of the inspection holes 263 and the blocking members 264 may be other than those shown in this embodiment, and may be in only one location or in four or more locations.

[0075] The cooling devices 1, 1A, and 1B may have a structure that combines the first and second modifications. Thus, the shells 2 and 2A may have the plate inspection hole 321, and the lids 7 and 7A may have the lid inspection hole 71.

[0076] <Additional Notes> The cooling devices 1, 1A, and 1B, the guide jig 200, and the inspection method S10 described in the embodiments can be understood, for example, as follows.

[0077] (1) A cooling device 1, 1A, 1B according to a first aspect includes a shell 2, 2A having a shell body 21 formed in a cylindrical shape extending about an axis O, an inlet nozzle 24 that feeds a fluid G into the shell body 21, an outlet nozzle 25 that is disposed apart from the inlet nozzle 24 in an axial direction Da along which the axis O extends and that feeds the fluid G from inside the shell body 21 to the outside, and an end plate 26 that closes an opening 201 at an end of the shell body 21 in the axial direction Da, a cooler 3, 3A that is disposed inside the shell body 21 and is capable of cooling by circulating the fluid G that flows from the inlet nozzle 24 toward the outlet nozzle 25 inside the shell body, and a lid 7, 7A that is attachable to and detachable from an end of the shell body 21 in the axial direction Da, and the cooler 3, 3A is the cooling pipes 35 extending in the axial direction Da and having a cooling medium flowing therethrough; and a plurality of support plates 37 each having a plate shape perpendicular to the axial direction Da, arranged at intervals in the axial direction Da, and having a plurality of pipe insertion holes 371 for fixing the cooling pipes 35 in a state in which they are inserted in the axial direction Da. The end plate 26 has an end plate main body 261 having a plate shape perpendicular to the axial direction Da and closing the opening 201 of the shell main body 21, a plurality of pipe fixing holes 262 formed in the end plate main body 261 and for fixing the ends of the cooling pipes 35 in the axial direction Da in a state in which they are inserted, an inspection hole 263 formed in the end plate main body 261 alongside the pipe fixing holes 262 and communicating with the inside of the shell main body 21, and a closing member 264 that is detachable from the inspection hole 263 and closes the inspection hole 263.

[0078] As a result, the space inside the shell body 21 that communicates with the inspection hole 263 in the axial direction Da is positioned alongside the outer circumferential surface of the cooling pipe 35. Therefore, in the inspection method S10 that uses such an inspection hole 263, the blocking member 264 blocking the inspection hole 263 is removed, and the inspection cable 100 is inserted through the inspection hole 263, allowing the sensor 110 to be inserted at a position very close to the outer circumferential surface of the cooling surface. In other words, the cooler 3, 3A having multiple cooling pipes 35 can be inspected without being removed from the shell body 21. This allows the outer circumferential surfaces of the cooling pipes 35 inside the support plate 37 and the shells 2, 2A to be easily inspected.

[0079] (2) The cooling device 1, 1A, 1B relating to the second aspect is the cooling device 1, 1A, 1B of (1), and the multiple support plates 37 have support inspection holes 372 formed at positions that overlap with the inspection holes 263 when viewed from the axial direction Da.

[0080] As a result, by inserting the inspection cable 100 through the inspection hole 263 and passing it through the support inspection hole 372, the sensor 110 can be inserted into a position very close to the outer circumferential surface of the cooling surface, even if it is far from the inspection hole 263 in the axial direction Da, without being obstructed by the support plate 37. This allows for easy inspection deep inside the shell body 21.

[0081] (3) The cooling device 1, 1A, 1B according to a third aspect is the cooling device 1, 1A, 1B of (1) or (2), wherein the cooler 3, 3A is arranged at a position close to the inlet nozzle 24 relative to the plurality of cooling pipes 35 and has a first plate portion 32, 32A facing the inlet nozzle 24, and a second plate portion 33 arranged on the opposite side of the first plate portion 32, 32A across the plurality of cooling pipes 35 and supporting the plurality of support plates 37 together with the first plate portion 32, 32A, wherein the fluid G flows in one direction between the first plate portion 32, 32A and the second plate portion 33, and the inspection hole 263 is arranged at a position where the fluid G flows toward the plurality of cooling pipes 35 and at a position close to the second plate portion 33 when viewed from the axial direction Da.

[0082] This allows the cooling pipe 35 , which is most worn and therefore requires replacement the earliest, to be easily inspected through the inspection hole 263 .

[0083] (4) The cooling device 1, 1A, 1B according to the fourth aspect is any one of the cooling devices 1, 1A, 1B of (1) to (3), in which the blocking member 264 has a screw shaft 267 that is inserted into the inspection hole 263 and fastened to the inspection hole 263, a head 268 that is connected to the end of the screw shaft 267 and has a larger diameter than the screw shaft 267, and a sealing member 269 that can seal between the head 268 and the end plate 26.

[0084] As a result, the blocking member 264 can be easily fixed to the end plate 26 simply by inserting it into the inspection hole 263 using the screw shaft 267. Also, because the head 268 has a larger diameter than the screw shaft 267, the blocking member 264 can be prevented from falling off from the inspection hole 263 into the inside of the shell body 21. Furthermore, the sealing member 269 can prevent the fluid G inside the shell body 21 from leaking from the inspection hole 263 when the inspection hole 263 is blocked with the blocking member 264 and the cooling devices 1, 1A, 1B are operated to supply the fluid G into the inside of the shell body 21.

[0085] (5) A cooling device 1A according to a fifth aspect is a cooling device 1A according to any one of (1) to (4), wherein the shell 2A has a shell inspection hole 28 that communicates with the interior of the shell body 21, and the cooler 3A has a first plate portion 32, 32A that is arranged in a position close to the inlet nozzle 24 relative to the plurality of cooling pipes 35 and faces the inlet nozzle 24, and a second plate portion 33 that is arranged on the opposite side of the first plate portion 32A across the plurality of cooling pipes 35 and supports the plurality of support plates 37 together with the first plate portion 32A, and the first plate portion 32A has a plate inspection hole 321 that is formed in the same position as the shell inspection hole 28 in the axial direction Da and communicates with the space between the first plate portion 32A and the second plate portion 33.

[0086] As a result, when viewed from the vertical direction Dv, the shell inspection hole 28 and the plate inspection hole 321 are connected, and communication is established from the outside of the shell 2A to the space between the first plate portion 32A and the second plate portion 33, where the cooling pipe 35 is located. This allows the sensor 110 to be inserted into a position very close to the outer periphery of the cooling surface by inserting the guide jig 200 and the inspection cable 100 through the shell inspection hole 28 and the plate inspection hole 321. In other words, the outer periphery of the cooling pipe 35 inside the shell 2A can be easily inspected without removing the lid portion 7 or the cooler 3A.

[0087] (6) The cooling device 1B according to the sixth aspect is any one of the cooling devices 1B of (1) to (5), and the lid portion 7A has a lid inspection hole 71 formed in a position that overlaps with the inspection hole 263 when viewed from the axial direction Da.

[0088] As a result, when viewed from the axial direction Da, with the lid inspection hole 71 and the inspection hole 263 connected, communication is established from the outside of the shell 2 to the space between the first plate portions 32, 32A and the second plate portion 33, where the cooling pipe 35 is arranged. This allows the sensor 110 to be inserted at a position very close to the outer circumferential surface of the cooling surface by inserting the guide jig 200 and the inspection cable 100 through the lid inspection hole 71 and the inspection hole 263. In other words, the outer circumferential surfaces of the cooling pipes 35 inside the support plate 37 and the shell 2 can be easily inspected without removing the lid portion 7A or the coolers 3, 3A.

[0089] (7) The guide jig 200 according to the seventh aspect is a guide jig 200 that is inserted into the inspection hole 263 of any one of the cooling devices 1, 1A, 1B of (1) to (6) and guides the inspection cable 100 having a sensor 110 at its tip into the interior of the shell body 21, and is formed in a tubular shape that allows the inspection cable 100 to be inserted inside when inserted into the inspection hole 263.

[0090] This prevents the inspection hole 263 from being damaged when the inspection cable 100 is inserted through the inspection hole 263.

[0091] (8) The guide jig 200 according to the eighth aspect is the guide jig 200 of (7), which opens in a direction perpendicular to the axial direction Da at a predetermined section from the tip end inserted into the inside of the shell body 21.

[0092] This allows the sensor 110 at the tip of the inspection cable 100 inserted into the guiding jig 200 to move freely inside the shell main body 21 in a direction perpendicular to the axial direction Da.

[0093] (9) The inspection method S10 according to the ninth aspect is an inspection method S10 for inspecting any one of the cooling devices 1, 1A, 1B of (1) to (6) using an inspection cable 100 having a sensor 110 disposed at its tip, and includes a step S1 of removing the blocking member 264 from the inspection hole 263, and a step S3 of inserting the inspection cable 100 into the inspection hole 263 and inspecting the inside of the shell body 21.

[0094] As a result, by removing the blocking member 264 blocking the inspection hole 263 and inserting the inspection cable 100 through the inspection hole 263, the sensor 110 can be inserted into a position very close to the outer circumferential surface of the cooling surface. In other words, the cooler 3, 3A having multiple cooling pipes 35 can be inspected without removing it from the shell body 21. This makes it easy to inspect the outer circumferential surfaces of the cooling pipes 35 inside the support plate 37 and the shell 2, 2A.

[0095] According to the cooling device, guide jig, and inspection method of the present disclosure, the outer surface of the cooling pipe inside the shell can be easily inspected.

[0096] DESCRIPTION OF SYMBOLS 8 Compressor system 9 Compressor 9A Front stage compressor 9B Rear stage compressor G Fluid 10A Front stage connecting pipe 10B Rear stage connecting pipe 1, 1A, 1B Cooling device 2, 2A Shell 21 Shell body 211 Opening 24 Inlet nozzle 25 Outlet nozzle O Axis 26 End plate 261 End plate body 262 Tube fixing hole 263 Inspection hole 264 Closing member 267 Screw shaft 268 Head 269 Seal member 3, 3A Cooler 31 Tube group 35 Cooling pipe 37 Support plate 371 Tube insertion hole 372 Support inspection hole 32, 32A First plate portion 33 Second plate portion 3i Inlet side opening 3o Outlet side opening 34 Extension portion 5 Partition member 4 Perforated plate 41 Hole 6 Demister 7, 7A Lid portion 100 Inspection cable 110 Sensor 200 Guide jig 201 Opening 202 Scale S10 Inspection method S1, S2, S3 Step 28 Shell inspection hole 29 Shell closing lid 321 Plate inspection hole 350 Plate closing lid 71 Lid inspection hole 750 Outer lid Da Axial direction Da1 First side Da2 Second side Dw Width direction Dw1 Inlet side Dw2 Outlet side Dv Vertical direction

Claims

1. A shell including a shell body formed in a cylindrical shape extending around an axis, an inlet nozzle for feeding fluid into the shell body, an outlet nozzle disposed away from the inlet nozzle in the axial direction of the axis and for discharging the fluid inside the shell body to the outside, and an end plate for closing an opening at an end of the shell body in the axial direction; a cooler disposed inside the shell body and capable of being cooled by circulating the fluid flowing from the inlet nozzle toward the outlet nozzle inside; and a lid portion detachably attached to an end of the shell body in the axial direction. The cooler includes a plurality of cooling pipes extending in the axial direction and through which a cooling medium flows, and a plurality of support plates having a plate shape perpendicular to the axial direction, disposed at intervals in the axial direction, and having a plurality of pipe insertion holes for fixing the cooling pipes in a state of being inserted therethrough in the axial direction. The end plate includes an end plate body having a plate shape perpendicular to the axial direction and closing the opening of the shell body, a plurality of pipe fixing holes formed in the end plate body for fixing the axial ends of the plurality of cooling pipes in a state of being inserted therethrough, an inspection hole formed in the end plate body and communicating with the inside of the shell body and formed side by side with the pipe fixing holes, and a closing member detachably attached to the inspection hole and closing the inspection hole.

2. The cooling device according to claim 1, wherein the plurality of support plates have support inspection holes formed at positions overlapping the inspection hole when viewed from the axial direction.

3. The cooler includes a first plate portion disposed at a position close to the inlet nozzle and facing the inlet nozzle with respect to the plurality of cooling pipes, and a second plate portion disposed on the opposite side of the first plate portion with the plurality of cooling pipes interposed therebetween and supporting the plurality of support plates together with the first plate portion. The fluid flows across between the first plate portion and the second plate portion in one direction. The inspection hole is disposed at a position where the fluid flows into the plurality of cooling pipes and at a position close to the second plate portion when viewed from the axial direction. The cooling device according to claim 1 or 2.

4. The closing member has a screw shaft fastened to the inspection hole in a state of being inserted into the inspection hole, a head connected to an end of the screw shaft and having a larger diameter than the screw shaft, and a sealing member capable of sealing between the head and the end plate. The cooling device according to claim 1 or 2.

5. The shell has a shell inspection hole communicating with the inside of the shell body. The cooler has a first plate portion disposed at a position close to the inlet nozzle and facing the inlet nozzle with respect to the plurality of cooling tubes, and a second plate portion disposed on the opposite side of the first plate portion with the plurality of cooling tubes interposed therebetween and supporting the plurality of support plates together with the first plate portion. The first plate portion is formed at the same position as the shell inspection hole in the axial direction and has a plate inspection hole communicating with a space between the first plate portion and the second plate portion. The cooling device according to claim 1 or 2.

6. The lid portion has a lid inspection hole formed at a position overlapping the inspection hole when viewed from the axial direction. The cooling device according to claim 1 or 2.

7. A guiding jig for guiding an inspection cable inserted into the inspection hole of the cooling device according to claim 1 or 2 and having a sensor disposed at a tip end thereof into the inside of the shell body, the guiding jig being formed in a tubular shape into which the inspection cable can be inserted in a state of being inserted into the inspection hole.

8. The guiding jig according to claim 7, which has an opening in a direction orthogonal to the axial direction in a predetermined section from a tip end portion inserted into the inside of the shell body.

9. An inspection method for inspecting the cooling device according to claim 1 or 2 by using an inspection cable having a sensor disposed at a tip end thereof, the inspection method including a step of removing the closing member from the inspection hole and a step of inserting the inspection cable into the inspection hole to inspect the inside of the shell body.

Images