A method for wiring a temperature sensor measuring cable of a LNG ship cargo hold containment system

Abstract

The application discloses a wiring method of a temperature sensing cable of a temperature sensor of a LNG ship cargo hold enclosure system, according to the operation platform space of the cargo hold back where the temperature sensing cable junction box can be installed and the size design of the insulation box and the insulation plate in the cargo hold, the space of the cabin hole and the space of the temperature sensing cable laying are reserved, according to the position of the cargo hold temperature sensor installed in the cargo hold, the cabin hole is opened by electric welding of the temperature sensing cable during the installation of the secondary insulation layer, after the temperature sensor is positioned and installed, the temperature sensing cable is smoothly laid in the installation of the secondary insulation box and the secondary insulation plate, and the wiring is completed through the cabin hole to the junction box on the cargo hold back. The application considers the size characteristics of the secondary insulation box and the secondary insulation plate of the new type LNG ship cargo hold enclosure system, meanwhile, the size and the form of the cabin hole of the temperature sensor temperature sensing cable are considered, and the best position of the cabin hole is reasonably designed.

Description

Technical Field

[0001] This invention belongs to the field of ship design and construction, and particularly relates to a wiring method for temperature sensor measuring cable in LNG ship cargo hold enclosure system. Background Technology

[0002] Large LNG carriers are special vessels that transport liquefied natural gas at a temperature of -163 degrees Celsius. The cargo hold storage temperature is -163 degrees Celsius. Real-time monitoring of the temperature of the secondary insulation layer of the membrane-type enclosure system, which adopts the concept of secondary panel shielding, is an essential means to determine whether the secondary panel shielding is intact. Therefore, the laying and installation of cargo hold temperature sensors and their temperature measuring cables are particularly important during the construction of the cargo hold.

[0003] In the prior art, Chinese invention patent 201810645373.2 discloses a method for arranging the primary loop trunk cable of a nuclear power ship, including determining the working section and obtaining the current safety level of the trunk cable arrangement within the working section; determining the routing and installation structure of the trunk cable within the working section, as well as the type and spacing of each branch cable in the trunk cable, based on the relevant structural information of the working section; determining the routing, installation structure, and spacing of the redundant trunk cable with the corresponding trunk cable, as well as the type and spacing of each branch redundant cable in the redundant trunk cable, based on the current safety level of the trunk cable arrangement within the working section; and arranging the cable in the working section according to the aforementioned information on the trunk cable and redundant trunk cable. This application differs from the ship type structure applied in this invention and is not applicable to large LNG ships.

[0004] Therefore, a wiring method for the temperature sensor measuring cable of the LNG ship cargo hold enclosure system was developed, which is suitable for large LNG ships. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and design a wiring method for the temperature sensor cable of the LNG ship cargo hold enclosure system. The method takes into account the size characteristics of the insulation box and insulation board of the new cargo hold enclosure system, while also taking into account the size and form of the penetration hole of the temperature sensor cable. The optimal position of the penetration hole is designed, the optimal route of the temperature sensor cable is designed, the amount of cable used is reduced, and cable damage is avoided as much as possible during actual ship installation.

[0006] To achieve the above objectives, the technical solution provided by the present invention is as follows: A wiring method for a temperature sensor cable in an LNG carrier cargo hold containment system is disclosed. The LNG carrier cargo hold containment system includes a temperature sensor connected to a temperature sensor cable. Multiple sets of temperature sensors are arranged between the secondary insulation layers of the LNG carrier cargo hold containment system. The temperature sensor cable is routed to a penetration hole in the LNG carrier cargo hold containment system and then through the penetration hole to a junction box installed on the back of the cargo hold. The temperature sensor cable is electrically connected to the ship's control system, enabling real-time monitoring of the temperature of the cargo hold containment system during LNG carrier loading.

[0007] A further preferred technical solution is a wiring method for a temperature sensor cable in an LNG carrier cargo hold containment system, the wiring method comprising the following steps: S1, A first type of through-tank process hole is opened. The secondary insulation layer includes a secondary insulation box and a secondary insulation board. A first type of through-tank process hole is opened between the secondary insulation boxes. According to the 1mm horizontal spacing and 60mm vertical spacing between the secondary insulation boxes of the LNG ship cargo tank enclosure system, a first type of through-tank process hole is opened between the secondary insulation boxes in the longitudinal corner area near the boundary of the LNG ship cargo tank wall. Space for the first type of through-tank process hole is reserved at the same time as the hole is opened. S2, Open a second type of through-tank process hole. Open another second type of through-tank process hole between the transverse ring secondary insulation boxes of the LNG ship cargo tank wall. According to the maximum longitudinal gap between the secondary insulation plate of the LNG ship cargo tank enclosure system and the hull structure connector, open the second type of through-tank process hole at the transverse ring of the LNG ship cargo tank wall. At the same time as opening the hole, reserve space for the second type of through-tank process hole. S3, Install temperature sensor. According to the design area of ​​the temperature sensor, install the temperature sensor of the cargo compartment enclosure system on the connector between the secondary insulation layers. S4. Laying the temperature measuring cable: After the temperature sensor is positioned and installed, the temperature measuring cable of the temperature sensor is laid through multiple compartment walls, and then through the second type of compartment penetration process hole and the first type of compartment penetration process hole to the junction box set on the back of the cargo compartment to complete the wiring.

[0008] S5, the temperature sensor is electrically connected to the ship's control system to monitor the temperature of the secondary insulation layer in the cargo hold in real time during the LNG carrier's loading process.

[0009] A further preferred technical solution is that the first type of through-cabin process hole includes a second through-cabin hole and a first through-cabin hole between the longitudinal angle secondary insulation boxes of the starboard top side bulkhead and the port side top side bulkhead; The second type of through-cabin process holes includes the fourth and fifth through-cabin holes between the transverse ring insulation box and the secondary insulation plate of the port side bottom side cabin bulkhead, and the third and sixth through-cabin holes between the transverse ring insulation boxes of the port side transverse bulkhead and the starboard side bottom side cabin bulkhead.

[0010] In a further preferred embodiment, the second and first penetration holes are circular holes with a diameter of 120 mm; the third penetration hole is an elliptical hole with a length of 140 mm and a width of 80 mm; the fourth and fifth penetration holes are elliptical holes with a length of 260 mm and a width of 80 mm; and the sixth penetration hole is an elliptical hole with a length of 260 mm and a width of 80 mm.

[0011] In a further preferred embodiment, the temperature sensors are arranged in pairs and installed on a connector that connects the secondary insulation layer to the hull structure. This connector is provided with a mounting plate that connects to the hull structure.

[0012] In a further preferred embodiment, the bottom of the mounting plate is connected to the hull structure, and the mounting plate has a thickness of 9mm and dimensions of 1197.5mm x 980mm.

[0013] In a further optimized technical solution, the maximum longitudinal gap between the connectors connecting the secondary insulation plate and the hull structure is 31.25 mm.

[0014] A further preferred technical solution involves installing wooden blocks of varying thicknesses to adjust the flatness of the bulkheads between the secondary insulation layers and between the secondary insulation layers and the hull structure.

[0015] This invention discloses a wiring method for temperature sensor measuring cable in an LNG carrier cargo hold enclosure system. Through practical application in shipbuilding, this method has yielded the following beneficial effects: The wiring method for the temperature sensor measuring cable of this invention is applied to the cargo hold enclosure system of an LNG ship. It takes into account the size characteristics of the secondary insulation box and secondary insulation board of the cargo hold enclosure system, while also taking into account the size and form of the penetration hole of the temperature sensor measuring cable, and rationally designs the optimal position of the penetration hole.

[0016] The present invention relates to a wiring method for the temperature sensor cable of the LNG ship cargo hold enclosure system. It designs the optimal routing of the temperature sensor cable, reduces the amount of cable used, and avoids cable damage during actual ship installation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a cargo hold layout diagram for a wiring method of temperature sensor measuring cable for an LNG ship cargo hold enclosure system.

[0019] Figure 2 This is a schematic diagram illustrating the wiring method for a temperature sensor cable in an LNG carrier cargo hold enclosure system.

[0020] Figure 3 This invention relates to a wiring method for a temperature sensor cable in an LNG carrier cargo hold enclosure system, including the design of the second through-hole layout and the layout of the temperature sensor cable.

[0021] Figure 4 This invention relates to a wiring method for a temperature sensor cable in an LNG carrier cargo hold enclosure system, including the layout of the first through-hole and the arrangement of the temperature sensor cable.

[0022] Figure 5 This invention relates to a wiring method for a temperature sensor cable in an LNG carrier cargo hold enclosure system, including the layout of the third through-hole and the arrangement of the temperature sensor cable.

[0023] Figure 6 This document presents a design drawing of the sixth through-hole arrangement and the arrangement of the temperature measuring wire for a wiring method of a temperature sensor cable in an LNG ship cargo hold enclosure system.

[0024] Figure 7 This invention relates to a wiring method for a temperature sensor cable in an LNG carrier cargo hold enclosure system, including the arrangement of the fourth and fifth penetration holes and the cable layout.

[0025] The labels in the diagram are as follows: 11-First hatch, 12-Second hatch, 13-Third hatch, 14-Fourth hatch, 15-Fifth hatch, 16-Sixth hatch, TE-Sensor, TE 1-14A / B are sensors, A-Port deck, B-Port transverse bulkhead, C-Port bottom bulkhead, D-Starboard bottom bulkhead, E-Starboard top bulkhead, F-Starboard side bulkhead, G-Starboard side bottom bulkhead, H-Port top bulkhead, J-Port side bulkhead, K-Port side bottom bulkhead. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific examples, but this should not be construed as limiting the scope of protection of the present invention.

[0028] This invention discloses a wiring method for a temperature sensor cable in an LNG carrier cargo hold containment system. The method is applied to a novel containment system for LNG carriers. The LNG carrier cargo hold containment system includes a temperature sensor connected to a temperature sensor cable. Multiple temperature sensors are arranged between the secondary insulation layers of the LNG carrier cargo hold containment system. The temperature sensor cable is routed to the cargo hold penetration point of the LNG carrier cargo hold containment system. The wiring is completed at a junction box installed on the back of the cargo hold of the LNG carrier cargo hold containment system. The temperature sensor cable is electrically connected to the ship's control system, enabling real-time monitoring of the temperature of the secondary insulation layer of the cargo hold during LNG carrier loading. Specifically, there are 24 through-holes in the cargo hold of the temperature measuring cable, 112 temperature sensors, and approximately 4,500 meters of temperature measuring cable. The design principle is that the cargo hold temperature sensors are designed to monitor the real-time temperature of a designated area in the cargo hold during LNG carrier transportation. The cargo hold temperature sensors are routed through the temperature measuring cable to the through-hole on the cargo hold surface and through the cargo hold to the back of the cargo hold. The wiring is completed in the junction box on the back of the cargo hold, transmitting the temperature to the monitoring system.

[0029] A wiring method for a temperature sensor cable in an LNG carrier cargo hold enclosure system, the wiring method comprising the following steps: S1, A first type of through-tank process hole is opened. The secondary insulation layer includes a secondary insulation box and a secondary insulation board. A first type of through-tank process hole is opened between the secondary insulation boxes. According to the 1mm horizontal spacing and 60mm vertical spacing between the secondary insulation boxes of the LNG ship cargo tank enclosure system, a first type of through-tank process hole is opened between the secondary insulation boxes in the longitudinal corner area near the boundary of the LNG ship cargo tank wall. Space for the first type of through-tank process hole is reserved at the same time as the hole is opened. S2, Open a second type of through-tank process hole. Open another second type of through-tank process hole between the transverse ring secondary insulation boxes of the LNG ship cargo tank wall. According to the maximum longitudinal gap between the secondary insulation plate of the LNG ship cargo tank enclosure system and the hull structure connector, open the second type of through-tank process hole at the transverse ring of the LNG ship cargo tank wall. At the same time as opening the hole, reserve space for the second type of through-tank process hole. S3, Install temperature sensor. According to the design area of ​​the temperature sensor, install the temperature sensor of the cargo compartment enclosure system on the connector between the secondary insulation layers. S4. Laying the temperature measuring cable: After the temperature sensor is positioned and installed, the temperature measuring cable of the temperature sensor passes through multiple compartment walls for cable laying, and passes through the second type of compartment penetration process hole and the first type of compartment penetration process hole to the junction box set on the back of the cargo compartment to complete the wiring.

[0030] S5, the temperature sensor is electrically connected to the ship's control system to monitor the temperature of the secondary insulation layer in the cargo hold in real time during the LNG carrier's loading process.

[0031] like Figure 1 As shown, the insulation space of the 10 bulkheads on the starboard and port sides of the cargo hold, including the deck, top side compartment, side side compartment, bottom side compartment, bottom side compartment, and transverse bulkhead, encompassing 10 cargo hold bulkheads A / B / C / D / E / F / G / H / J / K, was created during the secondary insulation layer installation process after the structure was formed. This involved welding the temperature sensor cable through the compartment holes. After the temperature sensor was positioned and installed, the temperature sensor cable was successfully laid in the installation space of the secondary insulation box and secondary insulation board, and successfully passed through the compartment holes to the junction box at the rear of the cargo hold to complete the wiring.

[0032] like Figure 2 As shown, considering the new LNG carrier cargo hold containment system (NO96 SUPER+), the arrangement and specific form of the gaps in the secondary insulation modules for laying temperature sensor measuring cables have changed. This invention makes an innovative design for the penetration holes and their arrangement, all of which are designed near the boundary area. The holes are made using a larger longitudinal gap, making full use of the different spacings of the secondary insulation boxes and the secondary insulation plates to ensure that the penetration holes can be opened smoothly, the sensor measuring cables can pass through the hold smoothly, and the cable routing avoids 90-degree bends in the planar area.

[0033] The specific temperature sensor arrangement is as follows: Two sensors, 1A / B, are installed at the center of the ship on deck A on the port side. The cargo hold height is approximately 9 / 10 of the cargo hold height along the starboard top side bulkhead E. Two sensors, 2A / B, are installed approximately 5000mm from the stern. Two sensors, 7A / B, are installed approximately 4 / 10 of the cargo hold height along the starboard side bulkhead in the F-height direction, about 5000mm from the stern. Two sensors, 10A / B, are installed approximately 1 / 10 of the cargo hold height along the bottom bulkhead G on the starboard side of the cargo hold, about 5000mm from the stern. The cargo hold is located approximately 8 / 10 of its height along the H-axis of the top side bulkhead on the port side. Two sensors, 3A / B, are installed approximately 5000mm from the bow. Two sensors, 6A / B, are installed approximately 5000mm from the bow on the port side bulkhead, at a height of approximately 1 / 2 the cargo hold height in the J direction. Two sensors, 9A / B, are installed approximately 1 / 10 of the cargo hold height along the bottom bulkhead K on the port side of the cargo hold, about 5000mm from the bow. The cargo hold is approximately 6 / 10 of its height along the port side transverse bulkhead B. Two sensors, 5A and 5B, are installed near the ship's centerline. Eight sensors are installed on the port side bottom bulkhead C of the cargo hold; two 12A / B sensors are located near the pump tower base; and two 13A / B sensors are located near the center of port side bottom bulkhead C. There are two on each side, approximately 2000mm from the stern, on both sides: 14A / B and 11A / B.

[0034] The specific arrangement of the temperature measuring cable is based on the following: the secondary insulation box in the boundary area has a size of 1140mm x 999mm, and the spacing between the secondary insulation boxes is 60mm longitudinally and 1mm laterally; the insulation board in the planar area is a polyurethane foam board, and the size of the polyurethane foam board has changed significantly. The bottom plate with a thickness of 9mm in contact with the hull structure has a size of 1197.5mm x 980mm, and the upper polyurethane foam board has a size of 1179.5mm x 980mm. Therefore, the longitudinal bottom spacing of the secondary insulation board is only 2.5mm, the upper longitudinal spacing is 20.5mm, and the lateral spacing is 20mm.

[0035] like Figure 3 As shown, the starboard top bulkhead E has a second through-hole 12 with a diameter of 120mm. This hole is a circular hole and needs to pass through the sensors 2A / 2B on the starboard top bulkhead E, the sensors 7A / B on the starboard side bulkhead F, and the sensors 10A / B on the starboard side bottom bulkhead G, for a total of 6 sensors, requiring 6 temperature measurement cables. The longitudinal spacing of the 2Hxxx type secondary insulation boxes is 60mm, and the transverse gap is 1mm. The SF2xxx type module is a polyurethane insulation board, with a longitudinal gap of 2.5mm between the bottom mounting plate in contact with the cargo hold, a longitudinal gap of 20.5mm between the upper polyurethane foam, and a transverse gap of 20mm. Since the sensor temperature measurement cables need to be laid from the starboard side bottom bulkhead G all the way to the starboard top bulkhead E, the through-hole must be located at the nearest upper 2H type insulation box with a 60mm gap about 5000mm from the stern of the cargo hold. The 60mm insulation box gap is sufficient for laying 6 cables.

[0036] like Figure 4As shown, the port side top bulkhead H is provided with a first through hole 11. The upper part of the port side top bulkhead H (the back is a passage) about 5000mm from the bow has a first through hole 11 with a diameter of 120mm. The first through hole 11, which is 8 cables of 8 sensors of the port side deck A, port side top bulkhead H, port side bulkhead J, and port side bottom bulkhead K, is to pass through the first through hole of the port side top bulkhead H. The first through hole of the port side top bulkhead H needs to pass through the 8 cables required by the 8 sensors of the port side deck A, port side top bulkhead H, port side bulkhead J, and port side bottom bulkhead K. The sensor temperature measurement cable needs to be laid from the port side bottom bulkhead K all the way to the port side top bulkhead H. Therefore, the first through hole must be located about 60mm from the nearest upper 2H type secondary insulation box about 5000mm from the bow of the cargo hold. The 60mm gap is sufficient for the laying of 8 cables.

[0037] like Figure 5 As shown, a third through-hole 13, 140mm long and 80mm wide, is made near the upper centerline of the port side transverse bulkhead B at the stern of the cargo hold (the back of which is the transverse bulkhead). Two sensors of the port side transverse bulkhead B pass through this through-hole. The sensor temperature measurement cable needs to be installed from the connector between the nearest secondary insulation plates near the centerline (approximately 6 / 10 of the cargo hold height) all the way to the third through-hole. Therefore, the through-hole is located near the centerline, in the 60mm gap of the nearest upper 2H-type secondary insulation box. Two 5mm cables can be fixed side by side and pass through the third through-hole 13.

[0038] like Figure 6 As shown, the starboard bottom bulkhead D at the bow of the cargo hold is provided with a sixth through-hole 16. This hole needs to pass through the four cables required for the four sensors of the starboard bottom bulkhead D. The sensor temperature measurement cables need to be laid from the connector mounting plate between the nearest secondary insulation plates at approximately 3 / 10 and 7 / 10 of the cargo hold height near the centerline all the way to the sixth through-hole. Therefore, the sixth through-hole is located at the 60mm gap of the nearest upper 2H-type secondary insulation box near the centerline. The four 5mm cables can pass through the sixth through-hole in a fixed position side by side.

[0039] like Figure 7 As shown, two elliptical holes, 260mm long and 80mm wide, are made in the port side bottom bulkhead C and the bottom pipe tunnel area of ​​the cargo hold. The fourth through hole 14 and the fifth through hole 15 are made in the port side bottom bulkhead C. The fourth through hole 14 passes through four sensors 12A / B and 14A / B on the port side bottom bulkhead C. The fifth through hole 15 passes through four cables of four sensors 11A / B and 13A / B on the port side bottom bulkhead C.

[0040] The fourth through-hole 14 in the double-bottom pipe tunnel area at the stern of the cargo hold needs to pass through the four temperature measuring cables required for the four sensors 12A / B and 14A / B of the port bottom bulkhead D. The fifth through-hole 15 needs to pass through 11A / B and 13A / B of the port bottom bulkhead D. Four temperature measurement cables are required for the four sensors. Due to the special position of the sensors on the port side bottom bulkhead C, the penetration holes need to be opened in the pipe tunnel area near the stern centerline of the port side bottom bulkhead C to ensure the operating space of the junction box on the back. The longitudinal spacing of the secondary insulation boxes of the 1Hxxx type is 60mm, and the transverse gap is 1mm. The SC2xxx type module is a polyurethane insulation board. The longitudinal gap of the mounting plate in contact with the cargo hold surface at the bottom is 2.5mm, the longitudinal gap of the upper polyurethane foam is 20.5mm, and the transverse gap is 20mm. The largest longitudinal gap is the gap between the stern secondary insulation box and the secondary polyurethane foam board, which is 30+1.25=31.25mm. The cable diameter is 5mm. The four cables can pass side by side through the fourth penetration hole 14 and the fifth penetration hole 15.

[0041] This invention takes into account the size characteristics of the secondary insulation box and secondary insulation board of the new cargo hold containment system (NO96 SUPER+) for LNG ships, while also taking into account the size and form of the penetration hole for the temperature sensor temperature measurement cable, and rationally designs the optimal position of the penetration hole.

[0042] The above is merely one implementation of this invention. Other similar methods and structural substitutions can be made based on the same idea, and are not limited to the steps and structural components already described. In summary, the scope of protection of this invention also includes other variations and substitutions that are obvious to those skilled in the art.

Claims

1. A wiring method for a temperature sensor measuring cable in an LNG carrier cargo hold enclosure system, characterized in that, The LNG carrier cargo hold containment system includes temperature sensors connected to temperature sensing cables. Multiple sets of temperature sensors are arranged between the secondary insulation layers of the LNG carrier cargo hold containment system. The temperature sensing cables are routed to the cargo hold containment system's penetration holes and then through these holes to a junction box installed on the back of the cargo hold. The temperature sensing cables are electrically connected to the LNG carrier's control system, allowing for real-time monitoring of the cargo hold containment system's temperature during LNG loading. The wiring method includes the following steps: S1, A first type of through-tank process hole is opened. The secondary insulation layer includes a secondary insulation box and a secondary insulation board. A first type of through-tank process hole is opened between the secondary insulation boxes. According to the 1mm horizontal spacing and 60mm vertical spacing between the secondary insulation boxes of the LNG ship cargo tank enclosure system, a first type of through-tank process hole is opened between the secondary insulation boxes in the longitudinal corner area near the boundary of the LNG ship cargo tank wall. Space for the first type of through-tank process hole is reserved at the same time as the hole is opened. S2, Open a second type of through-tank process hole. Open another second type of through-tank process hole between the transverse ring secondary insulation boxes of the LNG ship cargo tank wall. According to the maximum longitudinal gap between the secondary insulation plate of the LNG ship cargo tank enclosure system and the hull structure connector, open the second type of through-tank process hole at the transverse ring of the LNG ship cargo tank wall. At the same time as opening the hole, reserve space for the second type of through-tank process hole. S3, Install temperature sensor. According to the design area of ​​the temperature sensor, install the temperature sensor of the cargo compartment enclosure system on the connector between the secondary insulation layers. S4, Laying the temperature measuring cable: After the temperature sensor is positioned and installed, the temperature measuring cable of the temperature sensor is laid through multiple compartment walls, and then through the second type of compartment penetration process hole and the first type of compartment penetration process hole to the junction box set on the back of the cargo compartment to complete the wiring. S5, the temperature sensor is electrically connected to the control system of the LNG ship to monitor the temperature of the secondary insulation layer of the cargo hold in real time during the loading of the LNG ship.

2. The wiring method for the temperature sensor measuring cable of the LNG ship cargo hold enclosure system according to claim 1, characterized in that, The first type of through-cabin process hole includes a second through-cabin hole (12) and a first through-cabin hole (11) between the longitudinal angle secondary insulation boxes of the starboard top side bulkhead (E) and the port top side bulkhead (H). The second type of through-cabin process holes include the fourth through-cabin hole (14) and the fifth through-cabin hole (15) between the transverse ring insulation box and the secondary insulation plate of the port side bottom bulkhead (C), and the third through-cabin hole (13) and the sixth through-cabin hole (16) between the transverse ring insulation boxes of the port side transverse bulkhead (B) and the starboard side bottom bulkhead (D).

3. The wiring method for the temperature sensor measuring cable of the LNG ship cargo hold enclosure system according to claim 2, characterized in that, The second through-hole (12) and the first through-hole (11) are circular holes with a diameter of 120 mm; The third through-hole (13) is an elliptical hole with a length of 140 mm and a width of 80 mm; The fourth and fifth through holes (14 and 15) are elliptical holes with a length of 260 mm and a width of 80 mm. The sixth through-hole (16) is an elliptical hole with a length of 260 mm and a width of 80 mm.

4. The wiring method for the temperature sensor measuring cable of the LNG ship cargo hold enclosure system according to claim 1, characterized in that, The temperature sensors are arranged in pairs and installed on the connector that connects the secondary insulation layer to the hull structure. The connector is equipped with a mounting plate that is connected to the hull structure.

5. The wiring method for the temperature sensor measuring cable of the LNG ship cargo hold enclosure system according to claim 4, characterized in that, The bottom of the mounting plate is connected to the hull structure. The mounting plate is 9mm thick and has dimensions of 1197.5mm x 980mm.

6. The wiring method for the temperature sensor measuring cable of the LNG ship cargo hold enclosure system according to claim 1, characterized in that, The maximum longitudinal gap between the connectors that connect the secondary insulation plate to the hull structure is 31.25 mm.

7. The wiring method for the temperature sensor measuring cable of the LNG ship cargo hold enclosure system according to claim 1, characterized in that, Wooden blocks of varying thicknesses are installed between the secondary insulation layers and between the secondary insulation layers and the hull structure to adjust the flatness of the bulkheads.

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