JP2023016145A - Piping structure inside waveform partition tank upper stool - Google Patents

Abstract

To provide a piping structure inside a waveform partition tank upper stool not having an instrumentation piping and instrumentation piping support exposed to sunlight or sea water and, in addition, to provide a piping structure inside a waveform partition tank upper stool with block construction applied to the instrumentation piping and the instrumentation piping support device.SOLUTION: A piping structure inside a waveform partition tank upper stool is arranged with instrumentation piping and an instrumentation piping support for transferring cargo to each tank inside the waveform partition tank upper stool.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a piping structure in an upper stool of a corrugated bulkhead tank of a tanker.

2. Description of the Related Art Ships such as tankers are divided into a plurality of cargo holds in order to balance cargo and transport a wide variety of cargoes, and the cargo holds are partitioned by corrugated bulkheads. In order to erect each corrugated bulkhead in the hull, the corrugated bulkhead is supported above and below by structures called stools.

The applicant of the present application has already proposed the disclosure of Japanese Unexamined Patent Application Publication No. 2021-49854 regarding this type of upper stool with corrugated bulkheads. The disclosure of Japanese Patent Application Laid-Open No. 2021-49854 relates to the invention title "Tanker Upper Stool Arrangement Structure", and "... Residual liquid (cargo slag) does not stay on the stool top even when the cargo is changed. , To provide an upper stool arrangement structure for a tanker that enables work to be performed without climbing the stool top when cleaning a cargo tank. It has an upper vertical stool and/or an upper horizontal stool that are joined to the ceiling of the cargo tank and that suspend and fix the longitudinal corrugated bulkhead and/or the horizontal corrugated bulkhead that partition the cargo tank into a plurality of parts. By doing so (see the description of claim 1 of the patent publication, etc.), "... even when the cargo of the tanker is changed, the slag does not remain on the stool top, and the stool can be cleaned when the cargo tank is washed. It is possible to work without climbing on the top.. Structurally, there is no step in the tank top, so it contributes to reducing the load in tank cleaning work." See number 0012).

FIG. 6 is a diagram schematically showing an intersection of corrugated bulkheads of a cargo tank of a tanker of Example 1 of the upper stool arrangement structure for a tanker according to the disclosed invention attached as FIG. 1 to JP-A-2021-49854. , Fig. 6(a) is a schematic cross-sectional view in the horizontal direction (width direction) of the hull, Fig. 6(b) is a side cross-sectional view in the longitudinal direction (longitudinal direction) of the hull, Fig. 6(c) is a cross-sectional view It is a plane sectional view seen from the direction. In FIG. 6, reference numeral 101 denotes an upper stool arrangement structure for a tanker according to Embodiment 1 of the disclosed invention, 102a is a corrugated longitudinal bulkhead, 102b is a corrugated horizontal bulkhead, 103a is an upper vertical stool, and 103b is an upper horizontal stool. , 104a, 104b are cargo tanks (cargo holds), 105 is a tank top, and 106 is a ballast tank. changed and explained.)

Further, regarding the piping structure inside the upper stool of a ship, for example, the one disclosed in Japanese Patent Application Laid-Open No. 2018-86951 is known. The disclosure of Japanese Patent Application Laid-Open No. 2018-86951 relates to the invention title "Bilge discharge promotion pipe", and "... A bilge discharge promotion pipe suitable for use in an ore carrier with a large loading capacity of iron ore relative to the hold volume. (see paragraph 0010 of the specification of the same publication), "a bilge discharge promoting pipe for discharging bilge contained in iron ore as a cargo to a bilge well, which is connected in order. A first portion provided in a lower stool supporting bulkheads that divide a ship hold into a plurality of cargo holds; a second portion having a plurality of communicating holes; and an end connected to the second portion and provided in an upper stool supporting the bulkhead opposite the end connected to the second portion, and a third portion reaching the upper deck, and the hole provided in the second portion is provided from the side of the first portion to at least a position higher than the upper surface of the cargo” (the same publication patent Scope of claim (see claim 1), and effects such as "the need to discharge the bilge in the cargo hold during unloading is eliminated or reduced." reference).

FIG. 7 is a schematic diagram of a bilge discharge promotion pipe attached as FIG. 1 to JP-A-2018-86951. 7, reference numeral 310 denotes a bilge discharge promotion pipe, 320 a first portion, 322, 332, 342 a first end portion, 324, 334, 344 a second end portion, and 330 a second portion. , 336 is a hollow portion, 338 is a hole, 340 is a third portion, 3100 is a hold, 3110 is a bilge well, 3120 is a lower stool, 3130 is a partition, 3140 is an upper stool, 3200 is a cargo (The code has been changed to 3 or 4 digits by the applicant in order to clarify that it is prior art.).
As described above, the disclosure of Japanese Patent Application Laid-Open No. 2021-49854 relates to a suspension type upper stool arrangement structure, and the disclosure of Japanese Patent Application Laid-Open No. 2018-86951 is a bilge discharge promoting pipe between the upper and lower stools. 310 is arranged.

Figures 8, 9, and 10 are schematic diagrams showing the layout of the tanker exposed section (outdoor) lead design equipment pipes of the applicant company. FIG. 9 is a cross-sectional view of the hull at the reference position of FIG. 8, and shows an enlarged circular view of the outline of the fixed state of the tanker exposed section guide fitting shown in FIG. Also, FIG. 10 is a schematic diagram of the vicinity of a remote control valve arranged on the bottom of the ship. 8, 9 and 10, reference numeral 400 denotes a tanker exposed deck, 401a and 401b cargo tanks, and 402 a tanker exposed (outdoor) conduit design (e.g., copper pipes, multi-core pipes, etc.). 403 is an instrumentation pipe support which is a cradle for fixing the instrumentation pipe 402; 404 is a unit band; (Codes have been described with three digits in the 400s to identify prior art).

As is clear from FIGS. 8, 9 and 10, the applicant company's tanker exposed section lead design instrumentation tube 402 consists of a plurality of instrumentation tubes on a unit band 404 arranged on a tanker exposed deck 400. 402 is fixed by an instrumentation pipe support 403, and is arranged from an instrumentation device 405 arranged near the bow cargo tank 401 on a unit band 404 on the tanker exposed deck 400 into a pipe duct 406 on the bottom of the ship on the stern side. It was led up to the remote control valve 407 provided.

However, since the tanker exposed section (outdoor) conduit pipe 402 is installed in an exposed section, it is exposed to sunlight and seawater, and there is a problem that both the instrumentation pipe 402 and the instrumentation pipe support 403 are easily corroded. was there. In addition, regarding the instrumentation pipe 402 in the exposed part, there are many concerns from various viewpoints such as workability in construction, appearance after completion, and corrosion countermeasures after entering service. In order to solve the problem, the shape of the instrumentation pipe support 403, the piping method, the construction method, etc. have been improved.

Therefore, the inventor of the present application is required to install an upper stool under the deck for ships with a mold depth of 16m or more in accordance with the application of the Steel Ship Regulations CSR-B&T enacted on February 27, 2015 (2020 Steel Ship Rules CSR-B&T Part 1, Chapter 3, Section 6, 10.4). It has been found that the instrumentation tube 402 and the instrumentation tube support 403 are installed in the upper stool.

JP-A-2021-49854 JP-A-2018-86951

To provide a piping structure inside an upper stool of a corrugated bulkhead tank in which an instrumentation pipe and an instrumentation pipe support are not exposed to sunlight or seawater by arranging the instrumentation pipe inside the corrugated bulkhead tank upper stool. .
Another object of the present invention is to provide a piping structure inside the upper stool of a corrugated bulkhead tank to which block construction is applied in installing an instrumentation pipe and an instrumentation pipe support inside the upper stool of the corrugated bulkhead tank.

In order to solve the above-mentioned problems, the invention according to claim 1 of the present application provides a corrugated bulkhead tank upper stool inner piping structure, an instrumentation pipe for transferring cargo to each tank into the corrugated bulkhead tank upper stool, and an instrumentation pipe. A support is provided.
Further, the invention according to claim 2 of the present application is the piping structure inside the corrugated bulkhead tank upper stool according to claim 1, wherein the instrumentation pipe and the instrumentation pipe support extend from the instrumentation equipment near the bow to the inside of the corrugated bulkhead tank upper stool. It is characterized by an instrumentation pipe and an instrumentation pipe support that are led through the bottom pipe duct to the remote control valve in the ship bottom pipe duct.
The invention according to Claim 3 of the present application is the corrugated bulkhead tank upper stool inner piping structure according to claim 1 or claim 2, wherein the corrugated bulkhead tank upper stool inner piping structure is used for suspending the upper stool top plate or the exposed deck. It is characterized by being a downward structure.
Further, the invention according to claim 4 of the present application is the corrugated bulkhead tank upper stool inner piping structure according to claim 1 or claim 3, wherein the corrugated bulkhead tank upper stool inner piping structure is used in block construction in a land factory. , and a piping structure inside the corrugated bulkhead tank upper stool located in the corrugated bulkhead tank upper stool after the block is turned upside down.

By installing the piping such as the instrumentation pipe 402 and the instrumentation pipe support 403 in the upper stool on the cargo tank 401 partitioned by the corrugated bulkhead of the tanker, it is not exposed to sunlight and seawater, and the material grade is lowered. can reduce costs.
Regarding workability of the installation work, the shape of the instrumentation pipe support 403 can be changed so that the preceding work can be done at the block stage, which contributes to the reduction of on-site installation work, and can flexibly respond to design changes. Therefore, in the future, it is possible to horizontally develop ships with similar structures, and similar effects can be expected.

FIG. 1 is a schematic view of the vicinity of the instrumentation equipment of the piping structure inside the upper stool of the corrugated bulkhead tank according to the first embodiment. FIG. 2 is a cross-sectional view of the hull of the upper stool internal piping structure of the corrugated bulkhead tank according to the first embodiment at the reference position of FIG. FIG. 3 is a schematic view of the vicinity of the remote control valve arranged on the bottom of the upper stool piping structure of the corrugated bulkhead tank according to the first embodiment. FIGS. 4(a), 4(b) and 4(c) are diagrams schematically showing the construction of the suspension piping structure inside the upper stool 3 of the piping structure 1 inside the corrugated bulkhead tank upper stool according to the first embodiment. 5(a), 5(b) and 5(c) show the shape of the instrumentation pipe support 6 used in the corrugated bulkhead tank upper stool inner piping structure 1 according to the present embodiment 1, and the instrumentation pipe support 6, which is turned upside down in the block construction after arrangement, and attached to the hull. It is a figure which shows the outline which installs. FIG. 6 is a diagram schematically showing an intersection of corrugated bulkheads of a cargo tank of a tanker in Example 1 of the upper stool arrangement structure for a tanker according to the disclosed invention attached as FIG. 1 to JP-A-2021-49854. . FIG. 7 is a schematic diagram of a bilge discharge promotion pipe attached as FIG. 1 to JP-A-2018-86951. FIG. 8 is a schematic view of the exposed lead installation near the instrumentation equipment of the conventional tanker exposed section (outdoor) lead design equipment of the Applicant Company. 9 is a sectional view of the hull at the reference position of FIG. 8. FIG. FIG. 10 is a schematic view of the vicinity of the bottom-mounted remote-controlled valve of the conventional tanker exposed section (outdoor) conduit design equipment of the Applicant Company.

An embodiment for carrying out the piping structure in the upper stool of the corrugated bulkhead tank according to the present invention will be described in detail with reference to the drawings.

1, 2, and 3 are schematic diagrams showing Example 1 of the piping structure in the upper stool of the corrugated bulkhead tank according to the present invention, and correspond to FIGS. 8, 9, and 10 described above. That is, FIG. 1 is a diagram corresponding to FIG. 8 described above, and is a schematic diagram of the vicinity of the instrumentation equipment of the piping structure in the upper stool of the corrugated bulkhead tank according to the first embodiment, and FIG. Correspondingly, it is a hull cross-sectional view of the piping structure in the upper stool of the corrugated bulkhead tank according to the present embodiment 1 at the reference position of FIG. It is shown in an enlarged view. FIG. 3 corresponds to FIG. 10 and is a schematic view of the vicinity of the remote control valve disposed on the bottom of the upper stool piping structure of the corrugated bulkhead tank according to the first embodiment.

1 to 3, reference numeral 1 denotes the piping structure inside the upper stool of the corrugated bulkhead tank according to the first embodiment, 2 denotes the tanker exposed deck, 3 denotes the upper stool of the corrugated bulkhead tank, and 4 denotes the corrugated bulkhead. A partitioned cargo tank, 5 is an instrumentation pipe arranged in the upper stool 3, 6 is an instrumentation pipe support for suspending the instrumentation pipe 5, 7 is a bottom pipe duct, and 8 is a bottom pipe. It is a remotely controlled valve placed in the duct 7 .
As is clear from FIGS. 1 to 3, the piping structure 1 in the upper stool of the corrugated bulkhead tank according to the first embodiment includes an upper stool 3 provided on top of the cargo tanks 4, 4 . . . partitioned by the corrugated bulkhead. It is a piping structure inside the upper stool of the corrugated bulkhead tank that is installed in the longitudinal direction of the hull inside, and one of the features is that it is housed and installed inside the upper stool 3 that is not exposed to sunlight or seawater on the exposed deck. .

Further, as is clear from the circular enlarged view of the outline of the fixing state of the piping inside the upper stool of the corrugated bulkhead tank in FIG. It is fixed in a suspended state under the deck, which is the top plate.

Such a hanging pipe structure under the deck, which is the top plate in the upper stool 3, can be easily realized by block construction (block construction) for the upper stool 3.
FIGS. 4(a), 4(b), and 4(c) are schematic diagrams showing the construction of the suspended piping structure within the upper stool 3 of the corrugated bulkhead tank upper stool internal piping structure 1 according to the first embodiment. (a) is an enlarged schematic diagram showing an outline of piping work in a factory during block construction, and FIG. 4(b) is an upside-down after block construction, and an upper stool 3 is installed in the upward direction of the hull. 4(c) is a schematic cross-sectional view of the hull, and FIG. 4(c) shows that the corrugated bulkhead tank upper stool inner piping structure 1 according to the first embodiment is positioned inside the upper stool 3 when the upper stool 3 is turned upside down. It is characterized in that it is installed in a so-called “suspension structure” that is suspended under the board or exposed deck 2 .
In FIGS. 4(a), 4(b) and 4(c), the same reference numerals are used for the members described in FIGS. 1 to 3, and detailed description thereof will be omitted.

As shown in FIGS. 4(a) to 4(c), one of the features is that the corrugated bulkhead tank upper stool internal piping structure 1 according to the first embodiment has a hanging structure inside the upper stool 3. FIG. However, the corrugated bulkhead tank upper stool internal piping structure 1 according to the first embodiment is not limited to a suspension structure within the upper stool 3 . As long as it is installed inside the upper stool 3 , it does not prevent it from being fixed to the floor or side wall of the upper stool 3 .
In short, the corrugated bulkhead tank upper stool internal piping structure 1 according to the first embodiment has an affinity for block construction, and even as an internal piping structure, the workability of its installation work, etc., will depend on prior construction at the block stage. It means that the workability is not particularly inferior.
In addition, by devising the shape of the instrumentation pipe support 6, it means that retrofitting can be easily changed even for a ship that already has the corrugated bulkhead tank upper stool 3.

Next, regarding the piping structure 1 inside the corrugated bulkhead tank upper stool 3 according to the first embodiment, the instrumentation pipe support 6 when performing block construction for installing the instrumentation pipe 5 will be described.
The instrumentation pipe support 6 used in the piping structure 1 inside the corrugated bulkhead tank upper stool 3 according to the first embodiment is assumed to be used in block construction (block construction).

5(a), 5(b) and 5(c) show the shape of the instrumentation pipe support 6 used in the corrugated bulkhead tank upper stool 3 internal piping structure 1 according to the present embodiment 1, and the hull after being reversed in the block construction after placement. It is a figure which shows the outline installed in.
5(a), 5(b) and 5(c), reference numeral 6 denotes an instrumentation tube support, 6a1 and 6a2 an instrumentation tube support outer frame, 6b an instrumentation tube receiving support, and 6c an instrumentation tube holder. Plates 6d1 and 6d2 are bolt holes formed in the upper plate between the outer frames 6a1 and 6a2, 6e1 and 6e2 are bolts at both ends of the 6c instrumentation tube support, and 6f1 and 6f2 are nuts.

As shown in FIG. 5(a), in the block construction of the upper stool 3, which is carried out upside down, the instrumentation pipe support 6 is opened under the U-shaped outer frames 6a1 and 6a2. The bolts 6e1 and 6e2 at both ends are directed upward, and a plurality of instrumentation tubes 5 to be installed are arranged thereon. After that, as shown in FIG. 5B, bolts 6e1 and 6e2 at both ends are inserted into the bolt holes 6d1 and 6d2 and tightened with nuts 6f1 and 6f2 to suspend the instrumentation tube 5. As shown in FIG.

Furthermore, as shown in FIG. 4(b), at the end of block construction, the upper stool 3 is turned over so that it is positioned above the hull, and finally a plurality of instrumentation pipes 5 are suspended within the upper stool 3. placed in a state. FIG. 5(c) shows that state.
By implementing block construction as shown in Fig. 5 (a), (b), and (c), installation of an upper stool 3 will be required for ships with a corrugated structure (corrugated bulkhead structure) and a mold depth of 16 m or more. (Rules for Steel Ships CSR-B&T), the support 6 for the instrumentation pipe, which was conventionally piped in the exposed part, was made of expensive stainless steel as a countermeasure against corrosion, but in the upper stool 3 By relocating it to a new location, there is no need to take measures against corrosion from seawater, etc., and it is possible to change the support material to a cheaper material. I know that.

This means that not only the members of the instrumentation pipe support 6, but also the plurality of instrumentation pipes 5 themselves do not need to be protected against corrosion from seawater, etc., and the upper stool 3 of the new section is used as a space for the pipes 5. Therefore, it becomes possible to install pipes and supports, which were installed in the open, in an environment where corrosion is difficult to occur.
Furthermore, since the piping 5 is abolished in the upper stool 3 without being exposed to exposure, it is freed from corrosion concerns, and the external appearance of the hull can also be improved. A cost advantage can also be obtained.

In particular, in the exposed arrangement of the instrumentation pipe 5, it took time to adjust the structure design and the site at the stage of determining the size and installation position of the opening for the pipe, and workability was poor. By doing so, the shape of the instrumentation pipe support 6 is changed so that the preceding construction can be performed at the block stage, and the installation of the instrumentation pipe 5 and the instrumentation pipe support 6 can be completed in the block construction, so the on-site installation work can be performed. This also contributes to the reduction of the workability.

INDUSTRIAL APPLICATION This invention is utilized for the piping structure in a corrugated bulkhead tank upper stool.

1 Piping Structure in Upper Stool of Corrugated Bulkhead Tank According to First Embodiment 2 Tanker Exposure Deck 3 Upper Stool of Corrugated Bulkhead Tank 4 Cargo Tank Partitioned by Corrugated Bulkhead 5 Instrumentation Pipe Arranged in Upper Stool 3 6 Meter Instrumentation pipe supports 6a1 and 6a2 for suspending the instrumentation pipe 5 Instrumentation pipe support outer frame 6b Instrumentation pipe receiving support 6c Instrumentation pipe holding plates 6d1 and 6d2 Bolts opened in the upper plate between the outer frames 6a1 and 6a2 Holes 6e1, 6e2 Bolts 6f1, 6f2 at both ends of instrumentation tube receiving support 6c Nuts 7 Ship bottom pipe duct 8 Remote control valve 101 arranged in ship bottom pipe duct 7 Tanker upper stool arrangement structure 102a according to Embodiment 1 of the disclosed invention Vertical corrugated bulkhead 102b Horizontal corrugated bulkhead 103a Upper vertical stool 103b Upper horizontal stool 104a, 104b Cargo tank (cargo hold)
105 tank top 106 ballast tank 310 bilge discharge promotion pipe 320 first part 322, 332, 342 first end 324, 334, 344 second end 330 second part 336 hollow part 338 hole 340 third part 3100 hold 3110 bilge well 3120 lower stool 3130 bulkhead 3140 upper stool 3200 cargo 400 tanker exposed deck 401a, 401b cargo tank 402 tanker exposed section conduit 403 instrumentation tube support 404 unit band 405 instrumentation 406 pipe duct 407 remote control valve

In order to solve the above-mentioned problems, the invention according to claim 1 of the present application provides a corrugated bulkhead tank upper stool internal piping structure, wherein the corrugated bulkhead tank upper stool internal piping structure is a suspension structure for the upper stool top plate or exposed deck. An instrumentation pipe and an instrumentation pipe support for transferring cargo to each tank are disposed in the corrugated bulkhead tank upper stool.
Further, the invention according to claim 2 of the present application is the piping structure inside the corrugated bulkhead tank upper stool according to claim 1, wherein the instrumentation pipe and the instrumentation pipe support extend from the instrumentation equipment near the bow to the inside of the corrugated bulkhead tank upper stool. It is characterized by an instrumentation pipe and an instrumentation pipe support that are led through the bottom pipe duct to the remote control valve in the ship bottom pipe duct.
Further, the invention according to claim 3 of the present application is the corrugated bulkhead tank upper stool inner piping structure according to claim 1 or claim 2 , wherein the corrugated bulkhead tank upper stool inner piping structure is used in block construction in an onshore factory. , a piping structure inside the corrugated bulkhead tank upper stool, which is piped at a lower position and positioned inside the corrugated bulkhead tank upper stool after the block is turned upside down.

Claims (4)

A piping structure in a corrugated bulkhead tank upper stool, characterized in that an instrumentation pipe and an instrumentation pipe support for transferring cargo to each tank are arranged in the corrugated bulkhead tank upper stool. The instrumentation pipe and instrumentation pipe support shall be the instrumentation pipe and instrumentation pipe support that lead from the instrumentation near the bow to the remote control valve in the bottom pipe duct through the upper stool of the corrugated bulkhead tank. The piping structure inside the corrugated bulkhead tank upper stool according to claim 1. 3. The piping structure in the corrugated bulkhead tank upper stool according to claim 1 or 2, wherein the piping structure in the upper stool of the corrugated bulkhead tank is a structure suspended from the top plate of the upper stool or the exposed deck. The piping structure inside the upper stool of the corrugated bulkhead tank shall be a piping structure inside the upper stool of the corrugated bulkhead tank, which is installed at the lower position during block construction in a land factory and located inside the upper stool of the corrugated bulkhead tank after the block is turned upside down. The corrugated partition tank upper stool internal piping structure according to claim 1 or 3, characterized in that:

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