Cooling device, guiding jig, and test method

Abstract

To easily test an outer peripheral face of a cooling pipe inside a shell.SOLUTION: A cooling device includes: a shell body; a shell having an end panel for closing an opening of an end part of the shell body in an axial direction; a cooler arranged inside the shell body; and a cover part attachable to and detachable from the end part of the shell body in the axial direction. The cooler has a plurality of cooling pipes, and a plurality of support panels having a plurality of pipe insertion holes. The end panel has: an end panel body for closing an opening of the shell body, the panel body forming a plate shape perpendicular to the axial direction; a plurality of pipe fixing holes formed on the end panel body and fixing in a state where the end part of the plurality of cooling pipes in the axial direction is inserted; a maintenance hole formed on the end panel body, formed to align with the pipe fixing holes and communicating with an inside of the shell body; and a closing member attachable to and detachable from the maintenance hole, and closing the maintenance hole.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a cooling device, a guiding jig, and an inspection method.

Background Art

[0002] When a fluid is compressed by a compressor, the temperature of the compressed fluid rises. In a multistage compressor or the like, when the compressed fluid is fed into another compressor or the like in the subsequent stage, a cooling device for cooling the fluid may be used in order to increase the compression efficiency of the fluid in the subsequent-stage compressor. As such a cooling device, a shell-and-tube type heat exchanger in which a tube bundle in which cooling tubes are gathered is arranged in a shell can be mentioned. In such a heat exchanger, it is necessary to inspect the inside of the shell.

[0003] For example, Patent Document 1 describes an in-tube cleaning and flaw detection device that cleans the inner surface of a heat transfer tube of a large heat exchanger and performs flaw detection inspection of the tube. In this device, a flexible tube having a flexibility with an outer diameter smaller than the inner diameter of the tube, an in-tube cleaner attached to the tip of the flexible tube, and a detector for flaw detection inspection, and a cable inserted into the flexible tube and connected to the detector are provided.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, when inspecting a shell-and-tube type heat exchanger, it is necessary to remove the lid arranged at the end of the shell to open the inside of the shell. Further, in the apparatus of Patent Document 1, although the inside of the cooling tube which is a tube can be inspected, the state of the outer peripheral surface of the tube cannot be inspected. And when inspecting the state of the outer peripheral surface of the tube, it is necessary to pull out and disassemble a bundle including a tube group in which a plurality of cooling tubes are gathered and other members attached to the tube group from the shell. Actual heat exchangers are often huge, and a great deal of labor is required for the work of pulling out the bundle from the shell. Therefore, it is desired to easily inspect the outer peripheral surface of the cooling tube inside the shell.

[0006] The present disclosure has been made to solve the above problems, and an object thereof is to provide a cooling device, a guiding jig, and an inspection method capable of easily inspecting the outer peripheral surface of a cooling tube inside a shell.

Means for Solving the Problems

[0007] To solve the above problems, the cooling device according to the present disclosure includes a shell body formed in a cylindrical shape extending around an axis, an inlet nozzle for feeding a fluid into the shell body, and an outlet nozzle disposed axially away from the inlet nozzle in the extending direction of the axis and for discharging the fluid inside the shell body to the outside, and a shell having 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 tubes extending in the axial direction and through which a cooling medium flows inside, and a plurality of support plates having a plate shape perpendicular to the axial direction, arranged at intervals in the axial direction, and having a plurality of tube insertion holes for fixing the cooling tubes in a state where the cooling tubes are 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 tube fixing holes formed in the end plate body and for fixing the axial ends of the plurality of cooling tubes in a state where the axial ends are inserted therethrough, an inspection hole formed in the end plate body and formed side by side with the tube fixing holes and communicating with the inside of the shell body, and a closing member detachably attached to the inspection hole and for closing the inspection hole.

[0008] Further, the guiding jig according to the present disclosure is a guiding jig for guiding an inspection cable inserted into the inspection hole of the cooling device and having a sensor disposed at the tip thereof into the shell body. The guiding jig is formed in a tubular shape through which the inspection cable can be inserted when inserted into the inspection hole.

[0009] Further, the inspection method according to the present disclosure is an inspection method for inspecting the cooling device with an inspection cable having a sensor disposed at the tip thereof, and includes a step of removing the closing member from the inspection hole and a step of inserting the inspection cable into the inspection hole and inspecting the inside of the shell body.

Effect of the Invention

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

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

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

[0013] (Configuration of Compressor System) As shown in FIG. 1, the cooling device 1 in this embodiment is provided in the 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] In the compressor system 8, the fluid G to be compressed is compressed by the front-stage compressor 9A and then sent to the 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 the front-stage connection pipe 10A. The cooling device 1 is connected to the inlet side Dw1 of the rear-stage compressor 9B via the rear-stage connection pipe 10B.

[0015] (Configuration of the cooling device) The cooling device 1 cools the gaseous fluid G compressed by the front-stage compressor 9A. The cooling device 1 reduces the power required for driving the rear-stage compressor 9B by cooling the fluid G during the compression process. In this embodiment, the fluid G cooled by the cooling device 1 is, for example, carbonic acid (CO2) gas containing moisture. The fluid G cooled by the cooling device 1 is not limited to carbonic acid gas and may be other gases such as air and nitrogen. The cooling device 1 is a shell-and-tube type 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 portion 7.

[0016] (Configuration of the shell) As shown in FIG. 2, the shell 2 has a hollow structure. The shell 2 includes a shell body 21, an inlet nozzle 24, an outlet nozzle 25, and end plates 26.

[0017] The shell body 21 is formed in a cylindrical shape extending around the axis O. As shown in FIG. 3, an opening 211 is formed at the end in the axial direction Da in which the axis O extends, such that one side in the axial direction Da is open in the shell body 21. In the shell body 21 of the present embodiment, the opening 211 is formed on the first side Da1 in the axial direction Da. The shell body 21 is arranged such that the axis O coincides with the horizontal direction. Note that, in the shell 2, it is preferable to make the inner diameter as large as possible in order to suppress the uneven flow of the fluid G inside.

[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 intervals in the axial direction Da in which the axis O extends. The inlet nozzle 24 and the outlet nozzle 25 are arranged above the shell body 21 in the vertical direction Dv with respect to the shell body 21 arranged in a horizontal state. Further, the inlet nozzle 24 and the outlet nozzle 25 are formed in a cylindrical shape extending upward from the upper part of the shell body 21 in the vertical direction Dv. The inlet nozzle 24 is connected to the front-stage connecting pipe 10A. The outlet nozzle 25 is connected to the rear-stage connecting pipe 10B. The lower ends of the inlet nozzle 24 and the outlet nozzle 25 open on the inner peripheral surface of the shell body 21 so as to communicate with the inside of the shell body 21.

[0019] In the present embodiment, the side on which the inlet nozzle 24 is arranged with respect 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 with respect to the inlet nozzle 24 is the second side Da2 in the axial direction Da.

[0020] As shown in FIG. 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. The end plate 26 is movable in the axial direction Da with respect to the shell body 21, and at the same time, the cooler 3 is movable. The detailed configuration of the end plate 26 will be described later.

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

[0022] The tube bundle 31 includes a plurality of cooling tubes 35 and a support plate 37. Each cooling tube 35 extends in the axial direction Da within the shell body 21. The plurality of cooling tubes 35 are arranged at intervals in the vertical direction Dv and the width direction Dw (the direction intersecting the axis O in the present embodiment) orthogonal to the axial direction Da, respectively. The plurality of cooling tubes 35 are arranged in a so-called staggered pattern such that the installation heights in the vertical direction Dv are different from each other between the cooling tubes 35 adjacent to each other in the width direction Dw. The cooling tube 35 is folded back in a U shape on the first side Da1 in the axial direction Da within the shell body 21. Each cooling tube 35 has, for example, a diameter of 30 mm or less. In each cooling tube 35, for example, water is supplied as a cooling medium. In each cooling tube 35, the water as the cooling medium flows from the first side Da1 in the axial direction Da toward the second side Da2, and the flow direction is changed 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 toward the first side Da1.

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

[0024] The tube insertion hole 371 fixes the cooling tube 35 in a state where it is inserted in the axial direction Da. Each tube insertion hole 371 penetrates the support plate 37 in the axial direction Da (plate thickness direction). Each cooling tube 35 is expanded and joined or inserted into each tube insertion hole 371 so as to be in sliding contact. For this reason, the plurality of tube insertion holes 371 are arranged in a staggered pattern according to the layout of the plurality of cooling tubes 35.

[0025] The support inspection holes 372 are formed in at least one of the support plates 37. The number of support inspection holes 372 in the present embodiment is the same as that of the inspection holes 263 described later. The support inspection holes 372 are formed side by side with the pipe insertion holes 371. The support inspection holes 372 penetrate the support plate 37 in the axial direction Da. When viewed from the axial direction Da, the support inspection holes 372 are arranged side by side at a distance from the position where the pipe insertion holes 371 are arranged. The support inspection holes 372 are formed with a diameter larger than that of the pipe insertion holes 371. When viewed from the axial direction Da, the support inspection holes 372 are formed at positions overlapping the inspection holes 263 with respect to the support plate 37.

[0026] The first plate portion 32 is arranged above the tube bundle 31 in the vertical direction Dv. The first plate portion 32 is arranged at a position close to the inlet nozzle 24 with respect to the plurality of cooling tubes 35. Thereby, the first plate portion 32 is arranged at a position facing the inlet nozzle 24 and the outlet nozzle 25 with respect to the tube bundle 31. The first plate portion 32 has a flat plate shape and extends along a plane (horizontal plane) orthogonal to the vertical direction Dv. The first plate portion 32 is formed in a rectangular shape when viewed from the vertical direction Dv orthogonal to the axial direction Da. The first plate portion 32 is arranged so as to cover the entire tube bundle 31 from above in the vertical direction Dv.

[0027] The second plate portion 33 is arranged on the opposite side of the first plate portion 32 with the plurality of cooling tubes 35 interposed therebetween. That is, the second plate portion 33 is arranged below the tube bundle 31 in the vertical direction Dv. The second plate portion 33 has a flat plate shape and extends along a plane (horizontal plane) orthogonal 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 arranged so as to cover the entire tube bundle 31 from below in the vertical direction Dv.

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

[0029] In the cooler 3, the fluid G passes between the first plate portion 32 and the second plate portion 33 arranged above and below in the vertical direction Dv from the inlet-side opening 3i to the outlet-side opening 3o, thereby contacting the cooling pipes 35 of the tube bundle 31. Here, the fluid G flows between the first plate portion 32 and the second plate portion 33 along the width direction Dw orthogonal to the axial direction Da. That is, the width direction Dw orthogonal 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 on which the inlet-side opening 3i is formed with respect to the tube bundle 31 is referred to as the inlet side (one side) Dw1. Also, the side where the fluid G flows out of the cooler 3 and on which the outlet-side opening 3o is formed with respect to the tube bundle 31 is referred to as the outlet side (the other side) Dw2. Therefore, between the first plate portion 32 and the second plate portion 33, it flows from the inlet side Dw1 to the outlet side Dw2 in the width direction Dw.

[0030] The end portion of the first plate portion 32 on the inlet side Dw1 in the width direction Dw is arranged with a gap from the shell body 21. The end portion of the first plate portion 32 on the outlet side Dw2 in the width direction Dw is arranged with a gap from the shell body 21.

[0031] Similarly, the end portion of the second plate portion 33 on the inlet side Dw1 in the width direction Dw is arranged with a gap from the shell body 21. The end portion of the second plate portion 33 on the outlet side Dw2 in the width direction Dw is arranged with a gap from the shell body 21.

[0032] (Configuration of the extending portion) Further, the cooler 3 further includes an extending portion 34. The extending portion 34 extends from the end of the second plate portion 33 toward the shell body 21. The extending portion 34 of the present embodiment has a flat plate shape. The extending portion 34 extends from the end on the inlet side Dw1 in the width direction Dw of the second plate portion 33 toward the inner peripheral surface of the shell body 21. The extending portion 34 extends obliquely so as to face the inlet side Dw1 in the width direction Dw as it goes downward in the vertical direction Dv from the end of the second plate portion 33. The tip of the second guide portion 53 is in contact with the lower inner peripheral surface 21f of the shell body 21. Thereby, the extending portion 34 is connected to the second plate portion 33 and partitions the space inside the shell body 21. Specifically, the extending portion 34 partitions the second plate portion 33 so that the fluid G does not flow into the lower part in the vertical direction Dv. Therefore, the fluid G that has reached the extending portion 34 is guided to the inlet side opening 3i without being directed downward in the vertical direction Dv with respect to the second plate portion 33. Further, the extending portion 34 is movable integrally with the cooler 3 and constitutes a part of the bundle together with the cooler 3.

[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 partitions the space between the cooler 3 and the inner peripheral surface of the shell body 21. Specifically, the partition member 5 partitions the space between the cooler 3 and the inner peripheral surface of the shell 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 constitutes a part of the bundle together with the cooler 3.

[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 in the width direction Dw of the cooler 3. That is, the perforated plate 4 covers the opening through which the fluid G flows into the cooler 3. The perforated plate 4 is arranged to cover the tube bundle 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. 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 constitutes a part of the bundle together with the cooler 3.

[0035] (Configuration of the demister) The demister 6 is arranged to cover the outlet-side opening 3o. The demister 6 collects the liquid component in which a part of the fluid G has condensed by the fluid G in which the fluid G in contact with the plurality of cooling tubes 35 flows. The demister 6 is arranged facing the outlet-side opening 3o located on the outlet side Dw2 in the width direction Dw of the cooler 3. That is, the demister 6 covers the opening through which the fluid G flows out of the cooler 3. The demister 6 is arranged to cover the tube bundle 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 constitutes a part of the bundle together with the cooler 3.

[0036] (Detailed configuration of the end plate) Further, as shown in FIGS. 3 and 5, the end plate 26 of the present embodiment has an end plate main body 261, a plurality of tube fixing holes 262, at least one inspection hole 263, and a closing member 264.

[0037] The end plate body 261 is formed in a flat plate shape that extends so as to be orthogonal to the axial direction Da. The end plate body 261 is detachably attached to the shell body 21 by a fastening member (not shown) such as a bolt. 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 (the inner side of the shell body 21) in the axial direction Da. 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 pipe fixing holes 262 are formed in the end plate body 261. The pipe fixing holes 262 penetrate the end plate body 261 in the axial direction Da and communicate the inside and the outside of the shell body 21. The pipe fixing holes 262 fix the axial ends of the plurality of cooling pipes 35 in a state where they are inserted therethrough. By fixing the plurality of cooling pipes 35 to the plurality of pipe fixing holes 262, it is possible to move the cooler 3 by moving the end plate body 261 in the axial direction Da with respect to the shell body 21. The plurality of pipe fixing holes 262 are formed at the positions where the plurality of cooling pipes 35 are arranged and at the positions where the pipe insertion holes 371 are formed when viewed from the axial direction Da.

[0039] At least one (three in this embodiment) inspection hole 263 is formed in the end plate body 261. The inspection hole 263 is formed side by side with the pipe fixing holes 262. The inspection hole 263 penetrates the end plate body 261 in the axial direction Da and communicates the inside and the outside of the shell body 21. When viewed from the axial direction Da, the inspection hole 263 is arranged separately from the position where the pipe fixing hole 262 is arranged. The cooling pipe 35 is not fixed to the inspection hole 263. The inspection hole 263 is formed with a diameter larger than that of the pipe fixing hole 262. The inspection hole 263 has the same diameter as the support inspection hole 372. The inspection hole 263 is arranged at the position where the fluid G flows in and at the position close to the second plate portion 33 when viewed from the axial direction Da. Therefore, the inspection hole 263 of this embodiment is formed at least at the end on the inlet side Dw1 in the width direction Dw and directly above the second plate portion 33 in the vertical direction Dv.

[0040] The closing member 264 is capable of closing the inspection hole 263. One closing member 264 corresponds to one inspection hole 263. The closing member 264 is formed of a corrosion-resistant material (e.g., stainless steel). The closing member 264 of the present 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 being 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 to have a size that cannot be 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 detachable from the end of the shell body 21 in the axial direction Da. The lid portion 7 is formed in a bottomed cylindrical shape. The lid portion 7 forms a space (water chamber) for storing the cooling medium between the surface facing the first side Da1 in the axial direction Da of the end plate body 261. 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 detachable from the end plate body 261 by a fastening member (not shown) such as a bolt.

[0043] (Procedure of the inspection method) Next, the inspection method S10 of the cooling device 1 will be described. As shown in FIG. 6, in the inspection method S10 of the present embodiment, inside the shell body 21 of the cooling device 1, the inside is inspected by an inspection cable 100 with a sensor 110 disposed at the tip. In the inspection method S10, the wear state of the cooling pipe 35 is inspected from the state of the outer peripheral surface of the cooling pipe 35. The inspection cable 100 is capable of photographing the inside of the shell body 21. The inspection cable 100 is, for example, a borescope (industrial endoscope) for observing and inspecting deep parts that cannot be directly visually observed. The sensor 110 is, for example, a sensor module incorporating a semiconductor element (solid-state imaging device) such as a CCD image sensor or a CMOS image sensor. The inspection cable 100 has flexibility and can be bent in any direction by operating from the outside. The inspection cable 100 has a cross-section of a size that can be inserted into the inspection hole 263 and the support inspection hole 372.

[0044] Note that the inspection cable 100 only needs to have a bendable structure. For example, it may be a serpentine robot having a multi-joint structure in which a plurality of highly flexible members are connected.

[0045] In the inspection method S10, the end plate body 261 is not removed from the shell body 21. The inspection method S10 is carried out in a state where the cooling medium is discharged from the inside of all the cooling pipes 35. Further, the inspection method S10 is carried out in a state where the fluid G is also discharged from the inside of the shell body 21. Also, in the inspection method S10 of the present embodiment, a guide jig 200 is used when inserting the inspection cable 100 into the inside of the shell body 21 from the inspection hole 263.

[0046] (Configuration of the guide jig) Here, the guiding jig 200 will be described. The guiding jig 200 is a jig for guiding the inspection cable 100 into the inside of the shell body 21 by being inserted into the inspection hole 263. The guiding jig 200 is formed in a tube shape into which the inspection cable 100 can be inserted when inserted into the inspection hole 263. The guiding jig 200 of the present embodiment is formed in a cylindrical shape. The guiding jig 200 has rigidity such that it does not bend due to its own weight when inserted into the inspection hole 263. Further, the guiding jig 200 has an opening in a direction orthogonal to the axial direction Da in a predetermined section from the tip inserted into the inside of the shell body 21. The opening 201 of the guiding jig 200 is formed to have a size that allows the sensor 110 to move. The opening 201 of the guiding jig 200 is formed such that the upper half orthogonal to the extending direction is opened when viewed from the extending direction. The length of the guiding jig 200 in the axial direction Da is made equal to the length of the shell body 21. Further, a plurality of scales 202 are formed on the outer peripheral surface of the guiding jig 200 at regular intervals. The plurality of scales 202 are formed at intervals of, for example, several tens of cm.

[0047] As shown in FIG. 7, in the inspection method S10, first, the closing member 264 is removed from the inspection hole 263 (step S1). In the present embodiment, first, the lid portion 7 is removed from the end plate body 261 fixed to the shell body 21. As a result, the closing member 264 with the head portion 268 exposed to the outside becomes visible. Then, the closing member 264 is removed from the inspection hole 263.

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

[0049] Thirdly, insert the inspection cable 100 into the inspection hole 263 to inspect the inside of the shell body 21 (step S3). Specifically, the inspection cable 100 is inserted into the inside of the guide jig 200 in a state of being 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. After that, together with the guide jig 200, the inspection cable 100 is inserted deeply to the position to be inspected of the shell body 21. However, even when the inspection cable 100 is inserted deeply into the shell body 21, the end portion of the guide jig 200 is maintained in a state of being located outside the shell body 21. Thereby, the sensor 110 reaches the position to be inspected and the inspection is carried out. After the inspection is completed, the closing member 264 is attached to the inspection hole 263. After that, the lid portion 7 is fixed to the end plate 26.

[0050] (Function and effect) In the cooling device 1 having the above configuration, a plurality of pipe fixing holes 262 for fixing the cooling pipes 35 are formed in the end plate 26 that closes the opening 211 at the end of the shell body 21. And an inspection hole 263 is formed side by side with the pipe fixing hole 262. Therefore, the space inside the shell body 21 that communicates with the inspection hole 263 in the axial direction Da is located alongside the outer peripheral surface of the cooling pipe 35. Therefore, in the inspection method S10 using such an inspection hole 263, by removing the closing member 264 that closes the inspection hole 263 and inserting the inspection cable 100 from the inspection hole 263, the sensor 110 can be inserted at a position very close to the outer peripheral surface of the cooling surface. That is, the cooler 3 having a plurality of cooling pipes 35 can be inspected without taking it out of the shell body 21. Generally, when inspecting the state of a plurality of cooling pipes 35, after taking out a bundle including the cooler 3, the perforated plate 4, the partition member 5, the demister 6, and the extension portion 34 from the shell body 21, it is necessary to further remove the perforated plate 4 and the demister 6 to disassemble the cooling pipes 35 so that they can be visually recognized. However, in the present embodiment, it is not necessary to disassemble the cooler 3. Thereby, the outer peripheral surface of the cooling pipe 35 inside the support plate 37 and the shell 2 can be easily inspected.

[0051] Further, the support plate 37 has a support inspection hole 372 formed at a position overlapping the inspection hole 263 when viewed in the axial direction Da. The support plate 37 is arranged at intervals in the axial direction Da inside the shell body 21 to support the cooling pipe 35. On the other hand, by inserting the inspection cable 100 from the inspection hole 263 and passing it through the support inspection hole 372, the sensor 110 can be inserted at a position very close to the outer peripheral surface of the cooling surface even at a position far from the inspection hole 263 in the axial direction Da without being obstructed by the support plate 37. Thereby, the inside of the shell body 21 can be easily inspected to a great depth.

[0052] Further, the inspection hole 263 is formed to be larger than the pipe fixing hole 262. Furthermore, 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 inside of the shell body 21.

[0053] Also, the fluid G flowing into the inside of the shell body 21 from the inlet nozzle 24 increases in flow velocity as it gets farther from the inlet nozzle 24. Therefore, at the position where the fluid G flows in away from the inlet nozzle 24, the fast-flowing fluid G collides with the cooling pipe 35, and the wear condition of the cooling pipe 35 becomes large. On the other hand, the inspection hole 263 is arranged at a position where the fluid G flows in and a position close to the second plate portion 33 when viewed in the axial direction Da. Therefore, the cooling pipe 35 with the largest wear and the earliest need for replacement can be easily inspected through the inspection hole 263.

[0054] Further, the closing member 264 has a screw shaft 267 fastened to the inspection hole 263, a head 268 having a diameter larger than that of the screw shaft 267, and a sealing member 269 capable of sealing between the head 268 and the end plate 26. By means of the screw shaft 267, the closing member 264 can be easily fixed to the end plate 26 simply by inserting it into the inspection hole 263. Also, since the head 268 has a diameter larger than that of the screw shaft 267, it is possible to prevent the closing member 264 from falling off from the inspection hole 263 into the interior of the shell body 21. Furthermore, by means of the sealing member 269, when the inspection hole 263 is closed by the closing member 264 and the fluid G is supplied into the interior of the shell body 21 by operating the cooling device 1, it is possible to suppress the fluid G inside the shell body 21 from leaking out through the inspection hole 263.

[0055] Also, when performing an inspection, a guiding jig 200 is inserted into the inspection hole 263. The guiding jig 200 is formed in a tube shape into which an inspection cable 100 can be inserted when the guiding jig 200 is inserted into the inspection hole 263. Therefore, when the inspection cable 100 is inserted from the inspection hole 263, it is possible to suppress the inspection hole 263 from being damaged.

[0056] Also, the guiding jig 200 has an opening in a direction orthogonal to the axial direction Da in a predetermined section from the tip portion inserted into the interior of the shell body 21. Therefore, the sensor 110 at the tip of the inspection cable 100 inserted into the guiding jig 200 can move freely in a direction orthogonal to the axial direction Da inside the shell body 21.

[0057] Also, a scale 202 is formed on the outer peripheral surface of the guiding jig 200. Therefore, when the guiding jig 200 is inserted from the inspection hole 263 into the interior of the shell body 21, it is possible to easily grasp how far the guiding jig 200 is inserted into the shell body 21 in the axial direction Da. Accordingly, the position of the sensor 110 of the inspection cable 100 inserted into the shell body 21 via the guiding jig 200 can also be easily grasped.

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

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

[0060] The shell inspection hole 28 communicates with the inside of the shell main body 21. The shell inspection hole 28 is arranged at a distance from the inlet nozzle 24 on the first side Da1 in the axial direction Da. That is, the shell inspection hole 28 is arranged between the end plate 26 and the inlet nozzle 24 in the axial direction Da. The shell inspection hole 28 is arranged above the shell main body 21 in the vertical direction Dv with respect to the shell main body 21 arranged in a horizontal state. Further, the shell inspection hole 28 is formed in a cylindrical shape extending upward in the vertical direction Dv from the upper part of the shell main body 21 and having a flange at the end. The lower end of the shell inspection hole 28 opens on the inner peripheral surface of the shell main body 21 so as to communicate with the inside of the shell main body 21. The shell inspection hole 28 is formed to have a size through which the inspection cable 100 and the guide jig 200 can be inserted.

[0061] The shell closing lid 29 can close 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 a fastening member (not shown) such as a bolt. The shell closing lid 29 closes the shell inspection hole 28 by being fixed to the shell main body 21.

[0062] Further, the first plate portion 32A of the first modification 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 portions 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. The plate inspection hole 321 of the present embodiment penetrates the first plate portions 32, 32A in the vertical direction Dv. That is, the plate inspection hole 321 is formed at the same position as the shell inspection hole 28 when viewed from the vertical direction Dv, so that together with the shell inspection hole 28, it 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 in a size through which the inspection cable 100 and the guide jig 200 can be inserted.

[0064] Further, the cooler 3A has a plate closing lid 350. The plate closing lid 350 can close the plate inspection hole 321. The plate closing lid 350 is formed in a flat plate shape. The plate closing lid 350 is detachable from the first plate portion 32A by a fastening member (not shown) such as a bolt. The plate closing lid 350 closes the plate inspection hole 321 by being fixed to the first plate portion 32A.

[0065] (Function and effect) When inspecting the cooling device 1A of the first modification of the above configuration, the lid portion 7 is not removed from the end plate body 261 fixed to the shell body 21. Instead, the shell closing lid 29 is removed from the shell inspection hole 28. Thereby, the first plate portion 32A inside the shell body 21 becomes visible from the shell inspection hole 28. Then, the plate closing lid 350 is removed from the plate inspection hole 321. As a result, when viewed from the vertical direction Dv, in a state where the shell inspection hole 28 and the plate inspection hole 321 are connected, it communicates 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 arranged. Thus, by inserting the guide jig 200 and the inspection cable 100 through the shell inspection hole 28 and the plate inspection hole 321, the sensor 110 can be inserted at a position very close to the outer peripheral surface of the cooling surface. That is, the outer peripheral surface of the cooling pipe 35 inside the support plate 37 and the shell 2 can be easily inspected without removing the lid portion 7 or the cooler 3.

[0066] <Second Modification Example> Next, the cooling device according to the second modification example of the present disclosure will be described. In the second modification example described below, components common to the above-described embodiment are denoted by the same reference numerals in the drawings and their descriptions are omitted. In the second modification example, although it is the same as the first modification example in that the inside of the shell 2 can be inspected without removing the lid portion 7A, it is different from the first modification example in that an inspection hole is formed in the lid portion 7A instead of the shell 2.

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

[0068] The lid inspection hole 71 communicates the inside and the 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. That is, 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, it communicates from the outside of the shells 2 and 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 that extends from the outer surface of the lid portion 7A toward the first side Da1 in the axial direction Da and has a flange at the end. The lid inspection hole 71 is formed to have a size through which the inspection cable 100 and the guide jig 200 can be inserted.

[0069] Further, the cooler 3 has an outer lid 750. The outer lid 750 can close 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 a fastening member (not shown) such as a bolt. The outer lid 750 closes the lid inspection hole 71 by being fixed to the lid portion 7A.

[0070] (Function and Effect) When inspecting the cooling device 1B of the second modification of the above configuration, the lid portion 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. As a result, the inside of the lid portion 7A becomes visible through the lid inspection hole 71. Thereafter, the closing member 264 is 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 portions 32, 32A and the second plate portion 33 where the cooling pipe 35 is arranged is communicated from the outside of the shell 2. Thus, by inserting the guide jig 200 and the inspection cable 100 through the lid inspection hole 71 and the inspection hole 263, the sensor 110 can be inserted at a position very close to the outer peripheral surface of the cooling surface. That is, the outer peripheral surface of the cooling pipe 35 inside the support plate 37 and the shell 2 can be easily inspected without removing the lid portion 7A or the cooler 3.

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

[0072] Note that the configurations of the cooling devices 1, 1A, and 1B are not limited to the configurations of the above embodiments. For example, the cooling devices 1, 1A, and 1B may have structures other than the shells 2, 2A, the coolers 3, 3A, the partition member 5, the perforated plate 4, and the demister 6. Further, the cooling devices 1, 1A, and 1B may not have the partition member 5, the perforated plate 4, and the demister 6. Also, the shells 2, 2A, the partition member 5, the perforated plate 4, and the demister 6 may have structures other than those of the above embodiments. Therefore, for example, the inlet nozzle 24 may be connected to the shell body 21 in the width direction Dw.

[0073] Also, the arrangement of the plurality of cooling pipes 35 constituting the tube bundle 31 is not limited to the arrangement of the above embodiments. For example, the plurality of cooling pipes 35 are not limited to being arranged in a staggered pattern as in the present embodiment, and may be arranged in a grid pattern.

[0074] Also, the number and positions of the inspection holes 263 and the closing members 264 arranged with respect to the end plate 26 are not limited to the structure of the present embodiment. For example, the number and positions of the inspection holes 263 and the closing members 264 may be set as appropriate within a range that does not affect the cooling performance of the cooling devices 1, 1A, and 1B, or in accordance with the locations to be inspected. Therefore, the number and positions of the inspection holes 263 and the closing members 264 may be other than those shown in the present embodiment, may be only at one location, or may be at four or more locations.

[0075] Also, the cooling devices 1, 1A, and 1B may have a structure that combines the first modification and the second modification. Therefore, the shells 2, 2A may have the plate inspection holes 321, and the lid portions 7, 7A may have the lid inspection holes 71.

[0076] <Appendix> The cooling devices 1, 1A, 1B, the guiding jig 200, and the inspection method S10 described in the embodiment are understood as follows, for example.

[0077] (1) The cooling devices 1, 1A, 1B according to the first aspect include a shell body 21 formed in a cylindrical shape extending around an axis O, an inlet nozzle 24 for feeding a fluid G into the shell body 21, and an outlet nozzle 25 disposed at a distance from the inlet nozzle 24 in the axial direction Da of the axis O and for discharging the fluid G inside the shell body 21 to the outside. Shells 2, 2A having an end plate 26 for closing an opening 201 at an end of the shell body 21 in the axial direction Da, a cooler 3, 3A disposed inside the shell body 21 and capable of being cooled by circulating the fluid G flowing from the inlet nozzle 24 toward the outlet nozzle 25 inside, and a lid portion 7, 7A detachably attached to an end of the shell body 21 in the axial direction Da. The cooler 3, 3A includes a plurality of cooling tubes 35 extending in the axial direction Da and through which a cooling medium flows inside, and a plurality of support plates 37 having a plate shape perpendicular to the axial direction Da, arranged at intervals in the axial direction Da, and having a plurality of tube insertion holes 371 for fixing the cooling tubes 35 in a state of being inserted therethrough in the axial direction Da. The end plate 26 includes an end plate main body 261 having a plate shape perpendicular to the axial direction Da and closing the opening 201 of the shell body 21, a plurality of tube fixing holes 262 formed in the end plate main body 261 for fixing the axial ends of the plurality of cooling tubes 35 in a state of being inserted therethrough, an inspection hole 263 formed in the end plate main body 261 and communicating with the inside of the shell body 21 and formed side by side with the tube fixing holes 262, and a closing member 264 detachably attached to the inspection hole 263 and closing 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 located along the outer peripheral surface of the cooling tubes 35. Therefore, in the inspection method S10 using such an inspection hole 263, by removing the closing member 264 closing the inspection hole 263 and inserting an inspection cable 100 through the inspection hole 263, the sensor 110 can be inserted at a position very close to the outer peripheral surface of the cooling surface. That is, the cooler 3, 3A having a plurality of cooling tubes 35 can be inspected without taking it out of the shell body 21 to the outside. Thereby, the outer peripheral surfaces of the support plates 37 and the cooling tubes 35 inside the shells 2, 2A can be easily inspected.

[0079] (2) The cooling devices 1, 1A, and 1B according to the second aspect are the cooling devices 1, 1A, and 1B of (1), and the plurality of the support plates 37 have support inspection holes 372 formed at positions overlapping the inspection hole 263 when viewed from the axial direction Da.

[0080] Thus, by inserting the inspection cable 100 from the inspection hole 263 and passing it through the support inspection hole 372, the sensor 110 can be inserted at a position very close to the outer peripheral surface of the cooling surface even at a position far from the inspection hole 263 in the axial direction Da without being obstructed by the support plate 37. As a result, the inside of the shell body 21 can be easily inspected up to the deep part.

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

[0082] As a result, the cooling tubes 35 with a large wear condition and the earliest need for replacement can be easily inspected through the inspection hole 263.

[0083] (4) The cooling devices 1, 1A, 1B according to the fourth aspect are any one of the cooling devices 1, 1A, 1B of (1) to (3), and the closing member 264 includes a screw shaft 267 fastened to the inspection hole 263 while being inserted into the inspection hole 263, a head 268 connected to an end of the screw shaft 267 and having a larger diameter than the screw shaft 267, and a seal member 269 capable of sealing between the head 268 and the end plate 26.

[0084] Thereby, by the screw shaft 267, the closing member 264 can be easily fixed to the end plate 26 only by inserting it into the inspection hole 263. Further, since the head 268 has a larger diameter than the screw shaft 267, it is possible to prevent the closing member 264 from falling off from the inspection hole 263 into the interior of the shell body 21. Furthermore, by the seal member 269, when the inspection hole 263 is closed by the closing member 264 and the cooling devices 1, 1A, 1B are operated to supply the fluid G into the interior of the shell body 21, it is possible to suppress the fluid G inside the shell body 21 from leaking through the inspection hole 263.

[0085] (5) The cooling device 1A according to the fifth aspect is any one of the cooling devices 1A of (1) to (4), and the shell 2A has a shell inspection hole 28 communicating with the interior of the shell body 21. The cooler 3A is disposed at a position close to the inlet nozzle 24 with respect to the plurality of cooling tubes 35, and includes first plate portions 32, 32A facing the inlet nozzle 24, and a second plate portion 33 disposed on the side opposite to the first plate portion 32A with the plurality of cooling tubes 35 interposed therebetween and supporting the plurality of support plates 37 together with the first plate portion 32A. The first plate portion 32A is formed at the same position as the shell inspection hole 28 in the axial direction Da and has a plate inspection hole 321 communicating 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 the space between the first plate portion 32A and the second plate portion 33 where the cooling pipe 35 is disposed from the outside of the shell 2A communicates. Thus, by inserting the guide jig 200 and the inspection cable 100 through the shell inspection hole 28 and the plate inspection hole 321, the sensor 110 can be inserted at a position very close to the outer peripheral surface of the cooling surface. That is, the outer peripheral surface 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 from (1) to (5), and the lid portion 7A has a lid inspection hole 71 formed at a position overlapping the inspection hole 263 when viewed from the axial direction Da.

[0088] 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 portions 32, 32A and the second plate portion 33 where the cooling pipe 35 is disposed from the outside of the shell 2 communicates. Thus, by inserting the guide jig 200 and the inspection cable 100 through the lid inspection hole 71 and the inspection hole 263, the sensor 110 can be inserted at a position very close to the outer peripheral surface of the cooling surface. That is, the outer peripheral surface of the cooling pipe 35 inside the support plate 37 or 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 from (1) to (6) and guides the inspection cable 100 having the sensor 110 disposed at the tip thereof into the inside of the shell body 21, and is formed in a tubular shape through which the inspection cable 100 can be inserted in a state of being inserted into the inspection hole 263.

[0090] As a result, when the inspection cable 100 is inserted through the inspection hole 263, it is possible to prevent the inspection hole 263 from being damaged.

[0091] (8) The guiding jig 200 according to the eighth aspect is the guiding jig 200 of (7), and has an opening in a direction orthogonal to the axial direction Da in a predetermined section from the tip inserted into the inside of the shell body 21.

[0092] As a result, the sensor 110 at the tip of the inspection cable 100 inserted into the guiding jig 200 can move freely inside the shell body 21 in a direction orthogonal 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 from (1) to (6) with an inspection cable 100 having a sensor 110 disposed at the tip, and includes a step S1 of removing the closing member 264 from the inspection hole 263, and a step S3 of inserting the inspection cable 100 into the inspection hole 263 to inspect the inside of the shell body 21.

[0094] As a result, by removing the closing member 264 that closes the inspection hole 263 and inserting the inspection cable 100 through the inspection hole 263, the sensor 110 can be inserted at a position very close to the outer peripheral surface of the cooling surface. That is, the coolers 3, 3A having a plurality of cooling pipes 35 can be inspected without taking them out of the shell body 21 to the outside. Thereby, the outer peripheral surfaces of the cooling pipes 35 inside the support plate 37 and the shells 2, 2A can be easily inspected.

Explanation of Signs

[0095] 8... Compressor system 9... Compressor 9A... Front-stage compressor 9B... Rear-stage compressor G... Fluid 10A... Front-stage connection pipe 10B... Rear-stage connection 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... Sealing member 3, 3A... Cooler 31... Tube bundle 35... Cooling tube 37... Support plate 371... Tube insertion hole 372... Support inspection hole 32, 32A... First plate part 33... Second plate part 3i... Inlet side opening 3o... Outlet side opening 34... Extension part 5... Partition member 4... Perforated plate 41... Hole 6... Demister 7, 7A... Cover part 100... Inspection cable 110... Sensor 200... Guide jig 201... Opening 202... Scale S10... Inspection method S1, S2, S3... Processes 28... Shell inspection hole 29... Shell closing lid 321... Plate inspection hole 350... Plate closing lid 71... Cover inspection hole 750... Outer cover 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 a fluid into the interior of the shell body, an outlet nozzle disposed axially away from the inlet nozzle in the direction of extension of the axis 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; A lid 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 with a cooling medium flowing inside; A plurality of support plates having a plate shape perpendicular to the axial direction, spaced apart 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 for 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, formed side by side with the pipe fixing holes and communicating with the inside of the shell body; A cooling device having a closing member detachably attached to the inspection hole for 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; A second plate portion disposed on the side opposite to the first plate portion with the plurality of cooling pipes interposed therebetween for 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 toward the plurality of cooling pipes and at a position close to the second plate portion when viewed from the axial direction, according to claim 1 or 2.

4. The closing member includes: 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 diameter larger than that of the screw shaft; The cooling device according to claim 1 or 2, further including a sealing member capable of sealing between the head and the end plate.

5. The shell has a shell inspection hole that communicates with the inside of the shell body. The cooler is provided with a first plate portion that is disposed at a position close to the inlet nozzle and faces the inlet nozzle with respect to the plurality of cooling pipes, and a second plate portion that is disposed on the side opposite to the first plate portion with the plurality of cooling pipes interposed therebetween and supports the plurality of support plates together with the first plate portion. The cooling device according to claim 1 or 2, wherein 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 that communicates with the space between the first plate portion and the second plate portion.

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

7. A guiding jig for guiding a 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 is formed in a tubular shape into which the inspection cable can be inserted while being inserted into the inspection hole.

8. The guiding jig according to claim 7, which is open 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 with an inspection cable having a sensor disposed at a tip end thereof, the 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 and inspecting the inside of the shell body.

Images