A laying tool for a low-temperature cable of a dual-fuel container ship

Abstract

The application discloses a kind of laying tool of dual-fuel container ship low-temperature cable, including the support (1) of frame structure, fixed state clamp (2) is fixed in one end of frame structure, universal rotation hook (5) is arranged in the other end inside, the one end of low-temperature steel wire rope (6) is connected to the universal rotation hook (5), the handle (5) is arranged outside support (1) and is connected universal rotation hook (5), a plurality of group distribution movable state clamp (2) are arranged in the middle of support (1), low-temperature cable (3) is fixed on support (1) by multiple groups of clamp (2) with low-temperature steel wire rope (6), the interval size of low-temperature cable (3) between adjacent clamp (2) is longer than the interval size of low-temperature steel wire rope (6).The laying tool of the application makes the interval length of low-temperature steel wire rope less than the interval length of low-temperature cable, and the stress point is set on the steel wire rope to avoid cable damage, and the tension state of the steel wire rope is controlled to avoid error increase.

Description

Technical Field

[0001] This invention relates to shipbuilding, and particularly to preparatory work for laying cryogenic cables for dual-fuel container ships, specifically to a laying fixture for adjusting the spacing of cable wire ropes in a liquid cargo tank. Background Technology

[0002] This study addresses how to improve the quality of cryogenic cables for dual-fuel container ships operating at -161°C. Analysis revealed that during the construction of the first vessel, the spacing between the cryogenic cables securing the gas submersible pumps and the steel wire ropes was often uncontrolled. Repeated measurements of the cable clamp gaps showed they were either too small or too large. Particularly concerning was the installation of cryogenic cables for the backup gas submersible pumps; the supplier's factory dimensions did not meet the quality requirements of the shipowner and surveyor, resulting in excessive cable slack at the top flange, making it difficult to secure within the pump tower and causing friction and vibration, thus degrading product quality. Although stainless steel U-shaped clamps were later used to secure the cryogenic cables, the material did not meet the -161°C low-temperature resistance requirement.

[0003] Therefore, we need to invent a new type of tooling to adjust the seven clamps at the top of the flange, disassemble these clamps one by one, reduce the unnecessary size, and adjust the tension of the wire rope in the clamps on the bracket by the tension of the universal rotating hook, using the thread in the bracket to ensure that the length of the wire rope must be shorter than the low temperature cable, and the dimensions between the two clamps must also meet the requirements of the drawing. Summary of the Invention

[0004] The purpose of this invention is to provide a tooling for adjusting the spacing of cable wire ropes, which solves the problem that the spacing length of the low-temperature wire ropes is less than that of the low-temperature cables, so that the stress point is on the wire ropes and not on the cables after installation on the ship, thus avoiding cable damage; at the same time, it ensures that the dimensions of the low-temperature cables and low-temperature wire ropes installed must meet the requirements of the drawings.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0006] A laying fixture for cryogenic cables used in dual-fuel container ships is disclosed. The cryogenic cables are suspended and laid side-by-side in the liquid cargo tanks of the dual-fuel container ship by cryogenic steel wire ropes. The laying fixture structure includes a support, clamps, universal rotating hooks, and a crank handle. The support is a frame structure made of square steel and steel pipes. A fixed clamp is fixed at one end of the frame structure. The cryogenic cable and cryogenic steel wire rope pass through the fixed clamp into the support. The universal rotating hook is provided on the inner side of the other end of the frame structure and is connected to one end of the cryogenic steel wire rope. The crank handle is located on the outer side of the support and coaxially connected to the universal rotating hook. Multiple movable clamps are provided in the middle of the support and are distributed in groups. The cryogenic cable and cryogenic steel wire rope are clamped and fixed to the support by the multiple groups of clamps. The spacing between adjacent clamps on the support is longer than the spacing between cryogenic steel wire ropes. The cryogenic cable passes through the support from the end with the fixed clamp.

[0007] To further achieve the objectives of this invention, the support frame comprises: a frame consisting of square steel and steel pipes forming a reinforcing structure; long steel pipes welded to the middle positions on both sides of the support frame; and short steel pipes supported by a base and welded to the long steel pipes. Specifically, the entire frame is composed of square steel and steel pipes, with the square steel serving as the base. The steel pipes include long and short steel pipes; the long steel pipes are welded to the middle positions on both sides of the support frame and are parallel to the square steel; and the short steel pipes are supported between the square steel and the long steel pipes and connected by welding.

[0008] To further achieve the purpose of this invention, a universal rotating hook and a crank handle are installed on the right side of the bracket. The universal rotating hook and the crank handle are located on the same side of the bracket. The low-temperature steel wire rope is hooked onto the universal rotating hook, and the steel wire rope is tightened or loosened by rotating the internal thread crank handle of the bracket.

[0009] To further achieve the purpose of the present invention, a set of clamps are attached to the bracket. The first clamp is installed on the left side of the bracket. After the low-temperature cable and the low-temperature steel wire rope are passed through the clamp, they are fixed to the bracket with bolts. The other clamps are in a movable state and their dimensions can be changed according to the drawing requirements or the actual site conditions.

[0010] To further achieve the purpose of this invention, the clamp includes a low-temperature cable (-161°C). The low-temperature cable is inserted into a set of clamps and secured with bolts. It is necessary to ensure that the spacing of the low-temperature cable is longer than that of the low-temperature steel wire rope to avoid damage to the low-temperature cable due to stress.

[0011] To further achieve the purpose of this invention, a low-temperature steel wire rope is used as a component to connect two clamps. The connecting piece passes through the clamp and can move left and right in the gap between the clamps. Each side of the connecting piece is connected to one end of the steel wire rope. The steel wire ropes on the connecting pieces at both ends are fixed with tiger claws, so that multiple steel wire ropes can be connected into a whole steel wire rope. The tension of the low-temperature steel wire rope is adjusted by rotating the crank handle through the internal thread of the bracket. The steel wire rope must always be kept taut, and the spacing of the low-temperature steel wire ropes must be smaller than the spacing of the low-temperature cable.

[0012] To further achieve the purpose of this invention, in one implementation, the bracket is made of three low-temperature cables (U1, V1, W1) braided together and installed on the bracket, and the distance from the left to the right side of the bracket is exactly the distance between the two clamps.

[0013] To further achieve the purpose of this invention, in one implementation, the bracket can also be made of four low-temperature cables (E, U, V, W) braided together and installed on the bracket. The first clamp on the left side of the bracket is fixed on the bracket, and the subsequent clamps are flexibly positioned according to the requirements of the drawings or the site conditions.

[0014] To further achieve the purpose of this invention, in one implementation, the bracket can also be made of six low-temperature cables (U2, V2, W3, U3, V3, W3) braided together and installed on the bracket, with the distance from the left to the right side of the bracket being exactly the distance between the two clamps.

[0015] Based on the above technical solution, the laying fixture for cryogenic cables for dual-fuel container ships of the present invention has achieved the following technical effects through practical application:

[0016] 1. This invention is a tooling for adjusting the spacing of cable wire ropes during the laying of cryogenic cables for dual-fuel container ships. The tooling fixes one end of the first cable clamp on the left side of the support, while the other clamps are in a movable state, so that cryogenic cables and cryogenic wire ropes of various specifications can be simultaneously inserted into the clamp group to adjust the size between the clamp groups.

[0017] 2. In the auxiliary device of the present invention, the tension of the low-temperature steel wire rope is controlled by combining a universal rotating hook with a crank handle, thereby avoiding repeated measurement of the distance between the low-temperature cable and the low-temperature steel wire rope due to large errors, which further improves work efficiency and product quality. Attached Figure Description

[0018] Figure 1 This is a front view of a laying fixture for a dual-fuel container ship cryogenic cable according to the present invention.

[0019] Figure 2This is a top view of a laying fixture for a dual-fuel container ship cryogenic cable according to the present invention.

[0020] Figure 3 This is a structural diagram of three cryogenic cables mounted on a bracket in Embodiment 1 of a laying fixture for cryogenic cables for dual-fuel container ships according to the present invention.

[0021] Figure 4 This is a structural diagram of four cryogenic cables mounted on a bracket in Embodiment 2 of a cryogenic cable for a dual-fuel container ship according to the present invention.

[0022] In the diagram: 1. Support frame; 2. A set of clamps; 3. Low-temperature cable; 4. Universal rotating hook; 5. Hand crank; 6. Low-temperature steel wire rope Detailed Implementation

[0023] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, in order to further describe its structural composition and working method, but this should not be used to limit the scope of protection of the present invention.

[0024] like Figure 1 and 2 As shown, this invention is a laying fixture for cryogenic cables used in dual-fuel container ships. The cryogenic cables are suspended and laid side-by-side in the liquid cargo tanks of the dual-fuel container ship using cryogenic steel wire ropes. The auxiliary working structure for laying cryogenic cables includes a support frame 1 and a universal rotating hook 4. The universal rotating hook 4 is tightly fitted with a crank handle 5. A set of clamps 2 is installed on the support frame 1, and the cryogenic cable 3 and cryogenic steel wire rope 6 pass through the clamps 2 and are fixed with bolts. The support frame 1 is a frame structure. A fixed clamp 2 is fixed at one end of the frame structure. The cryogenic cable 3 and cryogenic steel wire rope 6 pass through the fixed clamp 2 into the support frame 1. The universal rotating hook 4 is located on the inner side of the other end of the frame structure. The universal rotating hook 4 is connected to one end of the cryogenic steel wire rope 6. One end of the universal rotating hook 4 is fixed, while the other end can rotate freely.

[0025] The crank handle 5 is located on the outside of the bracket 1 and coaxially connected to the universal rotating hook 4. Multiple movable clamps 2 are provided in the middle of the bracket 1. The multiple movable clamps 2 are distributed in groups. The low temperature cable 3 and the low temperature steel wire rope 6 are clamped and fixed on the bracket 1 by multiple groups of clamps 2.

[0026] The aforementioned cryogenic steel wire rope serves as a component for connecting two clamps. Connecting plates extend through both sides of the clamps and can move left and right within the clamp gaps. Each side of the connecting plate connects to one end of the steel wire rope. The steel wire ropes on both ends of the connecting plates are secured with claw-like fasteners, allowing multiple sections of steel wire rope to be connected into a single, continuous steel wire rope. The tension of the entire cryogenic steel wire rope can be adjusted by rotating a handle. It is crucial to maintain the steel wire rope at all times, and ensure that the spacing between the cryogenic steel wire ropes is smaller than the spacing between the cryogenic cables. This ensures that the cryogenic cables remain relaxed, preventing damage from excessive tension.

[0027] As the core objective of this invention, the spacing between adjacent clamps 2 on the support 1 is longer than the spacing between the low-temperature cables 3 and the low-temperature steel wire ropes 6, and the low-temperature cables 3 pass through the support 1 from one end of the clamps 2 which are in a fixed state.

[0028] The support 1 is a frame structure made of square steel and steel pipe. To strengthen the support 1 and prevent it from being affected by the tension of the wire rope 6, a long steel pipe with a total length of 2900mm is welded to the middle of the left and right sides of the support 1. Three short steel pipes with a length of 800mm are respectively perpendicular to the base and the long steel pipe, and are welded and fixed at the top and bottom to form the entire frame. Specifically, a universal rotating hook 4 and a crank handle 5 are installed on the right side of the support 1. The universal rotating hook 4 and the crank handle 5 are located on the same side of the support. The low-temperature wire rope 6 hooks onto the universal rotating hook 4, and the wire rope 6 is tightened or loosened by rotating the crank handle 5 located on the internal thread of the support.

[0029] As a basic application, a set of clamps 2 are attached to the bracket 1. The first clamp is installed on the left side of the bracket 1 as a fixed clamp. After the cryogenic cable 3 and the cryogenic steel wire rope 6 are inserted into the fixed clamp, they are fixed to the bracket with bolts. The other clamps are in a movable state, and their dimensions can be changed according to the drawings or actual site conditions. The working temperature of the cryogenic cable 3 is -161℃. After it is inserted into the set of clamps 2, it is tightened with bolts. It is necessary to ensure that the spacing of the cryogenic cable 3 is longer than the spacing of the cryogenic steel wire rope 6 to avoid damage to the cryogenic cable due to stress. The cryogenic steel wire rope 6 is used to connect the components between the two clamps. The steel wire rope 6 on the connecting pieces at both ends is fixed with three tiger claws. The tension of the cryogenic steel wire rope 6 is adjusted by rotating the crank handle 5 through the internal thread of the bracket 1. The steel wire rope 6 must always be kept taut, and the spacing of the cryogenic steel wire rope 6 must be smaller than the spacing of the cryogenic cable 3.

[0030] Example 1

[0031] In this embodiment, as Figure 3As shown, the three cryogenic cables 3 (U1, V1, W1) of each grade are braided into a group. First, they are threaded into the first clamp of the first set of clamps 2 on the left side of the bracket 1 and fixed to the bracket 1 with bolts. Simultaneously, the cryogenic steel wire rope 6 is threaded into the round hole of the connecting piece on the clamp, and the three wire clamps are tightened. The tension of the cryogenic steel wire rope 6 is adjusted by rotating the crank handle 5 through the internal thread of the bracket 1. After determining the spacing, the cryogenic steel wire rope 6 must always be kept taut to avoid affecting the dimensional accuracy. The distance between the first and second clamps is 2900mm, and so on until the last clamp, with each grade having a spacing of 2900mm. This spacing is exactly the spacing between the two sets of cryogenic cables (six and three cables), and also the spacing of the tooling. The length of the cryogenic cable 3 is adjusted by using a cryogenic steel wire rope. The length of the cryogenic cable 3 must be greater than the length of the cryogenic steel wire rope 6. Otherwise, the stress point of the cryogenic steel wire rope 6 will be transferred to the cryogenic cable 3, affecting the service life of the cryogenic cable 3.

[0032] Example 2

[0033] In this embodiment, as Figure 4 As shown, the four cryogenic cables 3 (E, U, V, W) of each grade are braided into a group. First, they are threaded into the first clamp of the set of clamps 2 on the left side of the bracket 1 and fixed to the bracket 1 with bolts. The cryogenic steel wire 6 is also threaded into the clamp at the same time. The tension of the cryogenic steel wire rope 6 is adjusted by rotating the crank handle 5 through the internal threads of the bracket 1 at the subsequent six clamp positions. After determining the spacing, the cryogenic steel wire rope 6 must always be kept taut to prevent loosening and ensure dimensional accuracy. Then, the length of the cryogenic cable 3 for each grade is adjusted. The length of the cryogenic cable 3 must be greater than the length of the cryogenic steel wire rope 6; otherwise, the stress point of the cryogenic steel wire rope 6 will shift to the cryogenic cable 3, affecting its service life.

[0034] Example 3

[0035] In this embodiment, the six cryogenic cables 3 (U2, V2, W2, U3, V3, W3) of each grade are braided into a group. First, they are threaded into the first clamp of a set of clamps 2 on the left side of the bracket 1 and fixed to the bracket 1 with bolts. Simultaneously, the cryogenic steel wire 6 is threaded into the circular hole of the connecting piece on the clamp, and the three wire clamps are tightened. The clamp position at the other end is then adjusted by rotating the crank handle 5 through the internal threads of the bracket 1 to adjust the tension of the cryogenic steel wire rope 6. After determining the spacing, the cryogenic steel wire rope 6 must always be kept taut to prevent loosening and ensure dimensional accuracy. Then, the length of the cryogenic cable 3 is adjusted. The length of the cryogenic cable 3 must be greater than the length of the cryogenic steel wire rope 6; otherwise, the stress point of the cryogenic steel wire rope 6 will shift to the cryogenic cable 3, affecting its service life.

[0036] In summary, the tooling for adjusting the spacing of cable wire ropes according to the present invention tightly integrates the bracket 1, the universal rotating hook 4, and the crank handle 5. Simultaneously, a set of clamps 2 are installed on the bracket 1, and the cryogenic cable 3 and the cryogenic wire rope 6 are threaded into the clamps 2 and fixed with bolts, thus achieving precision in the pre-assembly of the cryogenic cable. This tooling has a simple structure, low manufacturing cost, and is easy to use, further improving production efficiency.

[0037] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A laying fixture for cryogenic cables on dual-fuel container ships, wherein the cryogenic cables (3) are suspended and laid side-by-side on the dual-fuel container ship by cryogenic steel wire ropes (6), characterized in that, The laying fixture structure includes a support (1), a clamp (2), a universal rotating hook (4), and a crank handle (5). The support (1) is a frame structure made of square steel and steel pipe. A fixed clamp (2) is fixed at one end of the frame structure. The low-temperature cable (3) and the low-temperature steel wire rope (6) pass through the fixed clamp (2) and enter the support (1). The universal rotating hook (4) is provided on the inner side of the other end of the frame structure. The universal rotating hook (4) is connected to one end of the low-temperature steel wire rope (6). The crank handle (5) is located on the support. The universal rotating hook (4) is coaxially connected to the outside of the bracket (1). Multiple movable clamps (2) are provided in the middle of the bracket (1). The multiple movable clamps (2) are distributed in groups. The low temperature cable (3) and the low temperature steel wire rope (6) are clamped and fixed on the bracket (1) by multiple sets of clamps (2). Between adjacent clamps (2) on the bracket (1), the spacing of the low temperature cable (3) is longer than the spacing of the low temperature steel wire rope (6). The low temperature cable (3) passes through the bracket (1) from one end of the clamp (2) with a fixed state. On the same side of the bracket (1), a universal rotating hook (4) and a crank handle (5) are installed. One end of the low-temperature steel wire rope (6) is hooked onto the universal rotating hook (4). An internal thread is provided on the bracket (1). The crank handle (5) is inserted into the internal thread and rotates to tighten or loosen the low-temperature steel wire rope (6). A connecting piece is provided inside the clamp (2) to limit the low-temperature steel wire rope (6). The connecting piece can be movably inserted through the clamp. The two ends of the connecting piece are respectively connected to the steel wire rope, and the connection part is fixed with a tiger claw.

2. The laying fixture for cryogenic cables for dual-fuel container ships according to claim 1, characterized in that, The support frame is composed of square steel and steel pipes. The square steel serves as the base, and the steel pipes include long steel pipes and short steel pipes. The long steel pipes are welded to the middle position on both sides of the support and are parallel to the square steel. The short steel pipes are supported between the square steel and the long steel pipes and are connected by welding.

3. The laying fixture for cryogenic cables for dual-fuel container ships according to claim 1, characterized in that, The three low-temperature cables (U1, V1, W1) are braided together and installed on the bracket (1). The distance between the left and right sides of the bracket (1) is exactly the distance between the two clamps.

4. The laying fixture for cryogenic cables for dual-fuel container ships according to claim 1, characterized in that, The four low-temperature cables (E, U, V, W) are braided together and installed on the bracket (1). The first clamp on the left side of the bracket (1) is fixed to the end of the bracket as a fixed clamp, and the subsequent clamps are flexible positioning clamps.

5. The laying fixture for cryogenic cables for dual-fuel container ships according to claim 1, characterized in that, The bracket (1) is equipped with six low-temperature cables (U2, V2, W2, U3, V3, W3) braided into a group and installed on the bracket (1). The distance between the left and right sides of the bracket (1) is exactly the distance between the two clamps, 2900mm.

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