A submerged fuel pump cable installation apparatus and method for a liquid cargo tank

Abstract

The application discloses a kind of cable laying device and method in liquid cargo tank immersed fuel pump, cable laying device in the application includes the pump tower structure pipe column of top through LNG cabin combination dome, cable can enter liquid cargo tank and be connected with fuel pump by the pump tower structure pipe column, multiple installation supports for installing cable are slidably arranged in the pump tower structure pipe column, the installation support includes fixed clip group that can clamp cable, adjacent installation support is connected by connecting rope, and the installation support of head and tail of cable is connected by connecting rope.The cable laying method in the application uses the above-mentioned cable laying device.The device in the application is not only suitable for all types of liquid cargo tank, but also reduces the laying length of cable, reduces the influence of cable by liquid in liquid cargo tank, ensures the reliability and safety of immersed fuel pump operation in liquid cargo tank, so that the cable laying work of immersed fuel pump in LNG cabin is safe and simple.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding, and in particular to a cable laying device and method for a submersible fuel pump in a liquid cargo tank. Background Technology

[0002] In LNG carriers and LNG-powered ships, fuel pumps are typically submerged within the cargo tanks. The fuel pump cables are usually laid along the tank walls, a method that requires long cables and increases installation costs. However, some cargo tank walls are unsuitable for cable laying, necessitating the suspension of cables within the tank in direct contact with the LNG. Cables in direct contact with LNG are susceptible to LNG sloshing during ship operation, leading to poor contact between the fuel pump and the cable. This reduces the reliability of the submerged fuel pumps within the cargo tanks and increases the frequency of tank maintenance. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this application provides a cable laying device and method for a submerged fuel pump in a liquid cargo tank, thereby solving the technical problems of high cable laying cost and susceptibility to LNG sloshing in existing technologies.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0005] A cable laying device for a submersible fuel pump in a liquid cargo tank includes a pump tower structure column that passes through the top of the LNG tank assembly dome. The cable can enter the liquid cargo tank through the pump tower structure column and connect to the fuel pump. Multiple mounting brackets for installing the cable are slidably arranged inside the pump tower structure column. The mounting brackets include fixing clamps that can clamp the cable. Adjacent mounting brackets are connected by connecting ropes. The mounting brackets at both ends of the cable are connected by connecting ropes.

[0006] In one embodiment, the mounting bracket further includes a slider assembly, the fixing clamp is disposed inside the slider assembly, the slider assembly can slide along the inner wall of the pump tower structure column, and the slider assembly and the fixing clamp are detachably connected by fasteners.

[0007] In one embodiment, the fixing clamp assembly includes two first fixing clamps and one second fixing clamp. Both the first and second fixing clamps are cuboids. The length of the first fixing clamp is less than the length of the second fixing clamp. Both the first and second fixing clamps are perpendicular to the inner wall of the pump tower structure column. The two first fixing clamps are symmetrically arranged on the front and rear sides of the second fixing clamp. The two first fixing clamps are detachably connected to the second fixing clamp by fasteners. When the first fixing clamp is connected to the second fixing clamp, the cable can be clamped between the first and second fixing clamps.

[0008] In one embodiment, the opposing surfaces of the first fixing block and the second fixing block are each provided with a plurality of arc-shaped grooves. When the fastener connects the first fixing block and the second fixing block, the cable is embedded in the space formed by the arc-shaped grooves of the first fixing block and the arc-shaped grooves of the second fixing block.

[0009] In one embodiment, the arc of the arc groove is less than ninety degrees.

[0010] In one embodiment, the slider assembly includes two sliders with identical structures, which are detachably connected by fasteners. The left and right sides of the sliders are symmetrically provided with arc edges that match the inner wall of the pump tower structure column. The middle of the slider is provided with an opening groove. When the fasteners connect the two sliders, the fixing clamp is engaged in the space formed by the opening grooves of the two sliders.

[0011] In one embodiment, the arc of the circular edge is less than 90 degrees, and the opening groove is a groove with a stepped shape on one side.

[0012] In one embodiment, the mounting bracket further includes a hanging ring piece with three vertically distributed through holes. The first vertical through hole is used to connect the connecting rope of the adjacent mounting bracket to pass through, the second vertical through hole is used to fix the hanging ring piece to the first fixing clamp, and the third vertical through hole is used to connect the connecting rope of the upper and lower mounting brackets to pass through.

[0013] In one embodiment, the length of the connecting rope between adjacent mounting brackets is slightly greater than the length of the cable disposed between the mounting brackets, and the connecting rope is a steel wire rope, with the mounting brackets on the cable evenly distributed.

[0014] This application also provides a cable laying method for a submersible fuel pump in a liquid cargo tank, using the aforementioned cable laying device, comprising the following steps:

[0015] S1. Organize the cables and clamp multiple mounting brackets onto the cables;

[0016] S2. Install guide connecting ropes between two adjacent mounting brackets;

[0017] S3. Install connecting ropes between the mounting brackets at both ends of the cable;

[0018] S4: Insert the connecting rope from the top inlet of the LNG tank pump tower pipe column into the LNG tank pump tower pipe column and exit from the bottom of the LNG tank pump tower pipe column to smoothly insert the cable into the pump tower structure pipe column.

[0019] S5: Pull the cable out from the bottom of the pump tower structure column and connect it to the fuel pump. The cable at the top of the pump tower structure column is then passed through the cable interface on the pump tower structure column and fixed, completing the cable installation.

[0020] Compared with the prior art, this application has at least the following beneficial effects:

[0021] The cable laying device for a submerged fuel pump in a liquefied cargo tank according to this invention includes a pump tower structure column that passes through the top of the LNG tank's combined dome. This allows the cable to enter the liquefied cargo tank along the pump tower structure column and connect to the fuel pump. It is applicable to all types of liquefied cargo tanks, reduces cable laying length, and minimizes the impact of liquid sloshing within the cargo tank on the cable, ensuring the reliability and safety of the submerged fuel pump's operation. In this cable laying device, connecting ropes are used to limit the spacing displacement of the mounting brackets, ensuring the cable is not subjected to tensile force. The cooperation of the fixing clamps and slider assembly provides traction protection for the cable direction and connecting ropes, making the cable laying work for the LNG submerged fuel pump safe and simple. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the cable laying device for the submersible fuel pump in the liquid cargo tank in the embodiments of this application;

[0023] Figure 2 This is a schematic diagram of a cable structure with a mounting bracket installed in an embodiment of this application;

[0024] Figure 3 This is a top view of the connection point of the mounting bracket inside the tower tube column in the embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the mounting bracket in the embodiments of this application;

[0026] Figure 5 This is a top view of the mounting bracket in an embodiment of this application;

[0027] Figure 6 This is a side view of the mounting bracket in an embodiment of this application;

[0028] Figure 7 This is a top view of the fixed clamp assembly in an embodiment of this application;

[0029] Figure 8 This is a top view of the slider in an embodiment of this application;

[0030] Figure 9 This is a schematic diagram of the structure of the first fixing block in the embodiment of this application;

[0031] Figure 10 This is a schematic diagram of the structure of the second fixing block in the embodiment of this application;

[0032] Figure 11 This is a schematic diagram of the hanging ring plate structure in an embodiment of this application.

[0033] Reference numerals: 1. Fuel pump; 2. Mounting bracket; 3. Pump tower structure column; 4. LNG compartment dome; 5. Connecting rope; 6. Cable; 7. Fixing clamp; 8. Hanging ring; 9. Fastener; 11. First fixing block; 12. Second fixing block; 13. Sliding block. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0035] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0036] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms and should not be construed as indicating or implying relative importance. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0037] In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical connection or internal connection between two components. They can be direct connection or indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0038] To better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0039] like Figure 1-11The present embodiment provides a submersible fuel pump cable laying device in a liquid cargo tank, including a pump tower structure column 3 that passes through the top of the LNG tank combined dome 4. The cable 6 can enter the liquid cargo tank through the pump tower structure column 3 and connect to the fuel pump 1. Multiple mounting brackets 2 for installing the cable 6 are slidably arranged in the pump tower structure column 3. The mounting bracket 2 includes a fixing clamp group 7 that can clamp the cable 6. Adjacent mounting brackets 2 are connected by connecting ropes 5 to fix the position of the cable 6 in the pump tower structure column 3. The mounting brackets 2 at both ends of the cable 6 are connected by connecting ropes 5 so that the cable can pass out from the pump tower structure column 3.

[0040] like Figure 2-7 As shown, the mounting bracket 2 also includes a slider assembly, and the fixing clamp 7 is disposed inside the slider assembly. The slider assembly can slide along the inner wall of the pump tower structure column 3, and the slider assembly and the fixing clamp 7 are detachably connected by fasteners 9. Figure 7 As shown, the fixing clamp group 7 includes two first fixing clamps 11 and one second fixing clamp 12. Both the first fixing clamps 11 and the second fixing clamp 12 are cuboids. The length of the first fixing clamp 11 is less than the length of the second fixing clamp 12. Both the first fixing clamps 11 and the second fixing clamp 12 are set perpendicular to the inner wall of the pump tower structure column 3. The two first fixing clamps 11 are symmetrically arranged on the front and rear sides of the second fixing clamp 12. The two first fixing clamps 11 are detachably connected to the second fixing clamp 12 by fasteners 9. When the first fixing clamps 11 and the second fixing clamp 12 are connected, the cable 6 can be clamped between the first fixing clamps 11 and the second fixing clamp 12. To better secure the cable 6, in this embodiment, the opposing surfaces of the first fixing block 11 and the second fixing block 12 are each provided with several arc-shaped grooves. The curvature of the arc-shaped grooves is less than 90 degrees. When the fastener connects the first fixing block 11 and the second fixing block 12, the cable 6 is embedded in the space formed by the arc-shaped grooves of the first fixing block 11 and the second fixing block 12. In this embodiment, both the first fixing block 11 and the second fixing block 12 are provided with three arc-shaped grooves. The connecting rope 5 is a steel wire rope, and the mounting brackets 2 on the cable 6 are evenly distributed.

[0041] The slider assembly includes two identical sliders 13, which are detachably connected by fasteners, such as... Figure 8 As shown, the left and right sides of the slider 13 are symmetrically provided with arc edges that match the inner wall of the pump tower structure column 3. In order to make the slider assembly as lightweight as possible, the arc of the arc edge in this embodiment is less than 90 degrees. An opening groove is provided in the middle of the slider 13. When the fastener connects the two sliders 13, the fixing clamp 7 is engaged in the space formed by the opening groove of the two sliders 13. The opening groove is a stepped groove on one side, which increases the connection strength between the sliders 13 and can better restrict the movement of the first fixing clamp 11 and the second fixing clamp 12.

[0042] The fasteners in this embodiment include studs, nuts, and washers. The first fixing block 11, the second fixing block 12, and the slider are all provided with threaded through holes corresponding to the studs. After the stud passes through the threaded hole, the nut is spot-welded to the stud to prevent the fastener components from falling off and damaging the cargo tank and the equipment inside.

[0043] like Figure 4 , 5 As shown in Figure 11, the mounting bracket 2 also includes a hanging ring plate 8. The hanging ring plate 8 has three vertically distributed through holes. The first vertical through hole is used to connect the connecting rope 5 of adjacent mounting brackets 2, the second vertical through hole is used to fix the hanging ring plate 8 to the first fixing clamp 11, and the third vertical through hole is used to connect the connecting ropes 5 of the upper and lower mounting brackets 2. The length of the connecting rope 5 between adjacent mounting brackets 2 is slightly greater than the length of the cable 6 placed between the mounting brackets 2 to avoid potential damage to the cable 6 due to tensile force.

[0044] This embodiment also provides a method for laying cables for submersible fuel pumps in liquid cargo tanks, using the aforementioned cable laying device for submersible fuel pumps in liquid cargo tanks, including the following steps:

[0045] S1. Organize the cable 6 and clamp multiple mounting brackets 2 onto the cable 6;

[0046] S2. Install a guide connecting rope 5 between two adjacent mounting brackets 2. The connecting rope 5 passes through the first vertical through hole on the hanging ring piece 8.

[0047] S3. Install a connecting rope 5 between the mounting brackets 2 at both ends of the cable 6. The connecting rope 5 passes through the third vertical through hole on the hanging ring plate 8 inside the mounting brackets 2 at both ends of the cable 6.

[0048] S4: Insert the connecting rope 5 from the top inlet of the LNG tank pump tower pipe column 3 and exit from the bottom to smoothly insert the cable 6 into the pump tower structure pipe column 3.

[0049] S5: Pull the cable 6 out from the bottom of the pump tower structure column 3 and connect it to the fuel pump 1. The cable 6 at the top of the pump tower structure column 3 passes through the cable interface on the pump tower structure column 3 and is fixed to complete the installation of the cable 6.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. An immersed fuel pump cable installation device within a liquid cargo tank, characterized by, The pump tower structure column comprises a plurality of mounting brackets for mounting the cable, the mounting brackets are slidably arranged in the pump tower structure column, the mounting brackets comprise a fixed clamp set capable of clamping the cable, adjacent mounting brackets are connected by a connecting rope, and the mounting brackets at the two ends of the cable are connected by a connecting rope; The mounting bracket further comprises a sliding block assembly, the fixed clamp set is arranged in the sliding block assembly, the sliding block assembly is slidably arranged along the inner wall of the pump tower structure column, and the sliding block assembly and the fixed clamp set are detachably connected by a fastener; the fixed clamp set comprises two first fixed clamp blocks and one second fixed clamp block, the first fixed clamp block and the second fixed clamp block are both cuboids, the length of the first fixed clamp block is smaller than that of the second fixed clamp block, the first fixed clamp block and the second fixed clamp block are both arranged perpendicularly to the inner wall of the pump tower structure column, the two first fixed clamp blocks are symmetrically arranged on the front and back sides of the second fixed clamp block, and the two first fixed clamp blocks are detachably connected to the second fixed clamp block by a fastener; when the first fixed clamp block is connected to the second fixed clamp block, the cable can be clamped between the first fixed clamp block and the second fixed clamp block; the sliding block assembly comprises two sliding blocks which are the same in structure, the two sliding blocks are detachably connected by a fastener, and arc edges which are matched with the inner wall of the pump tower structure column are symmetrically arranged on the left and right sides of the sliding block; an open slot is arranged in the middle of the sliding block, and when the fastener connects the two sliding blocks, the fixed clamp set is clamped in the space formed by the open slots of the two sliding blocks.

2. A cable routing arrangement for an immersed fuel pump in a liquid cargo tank according to claim 1, characterized in that, The opposite surfaces of the first fixed clamp block and the second fixed clamp block are both provided with a plurality of arc-shaped slots, and when the first fixed clamp block and the second fixed clamp block are connected by the fastener, the cable is embedded in the space formed by the arc-shaped slots of the first fixed clamp block and the second fixed clamp block.

3. A cable routing arrangement for an immersed fuel pump in a liquid cargo tank according to claim 2, characterized in that, The arc of the arc-shaped slot is less than ninety degrees.

4. The cable routing arrangement for an immersed fuel pump in a liquid cargo tank according to claim 1, characterized in that, The arc of the arc edge is less than ninety degrees, and the open slot is a groove with a ladder-shaped side.

5. The cable routing arrangement for an immersed fuel pump in a liquid cargo tank according to claim 1, characterized in that, The mounting bracket further comprises a hanging ring piece, three vertical through holes are arranged on the hanging ring piece, the vertical first through hole is used for allowing the connecting rope of the adjacent mounting bracket to pass through, the vertical second through hole is used for fixing the hanging ring piece to the first fixed clamp block, and the vertical third through hole is used for allowing the connecting rope of the mounting bracket at the upper end or the lower end to pass through.

6. The cable routing arrangement for an immersed fuel pump within a liquid cargo tank of claim 1 wherein, The length of the connecting rope between adjacent mounting brackets is slightly greater than the length of the cable arranged between the mounting brackets, the connecting rope is a steel wire rope, and the mounting brackets on the cable are uniformly distributed.

7. A method of cable routing for an immersed fuel pump in a liquid cargo tank, characterized by The cable laying device comprises the following steps: S1, arranging the cable and clamping a plurality of mounting brackets on the cable; S2, installing a guide connecting rope between two adjacent mounting brackets; S3, installing a connecting rope between the mounting brackets at the two ends of the cable; S4, passing the connecting rope in S3 into the LNG tank pump tower column from the top inlet and out of the LNG tank pump tower column from the bottom, so that the cable is smoothly passed into the pump tower structure column; S5, pulling the cable out of the bottom of the pump tower structure column and connecting it to the fuel pump, and fixing the cable at the top of the pump tower structure column from the cable interface on the pump tower structure column, thereby completing the installation of the cable.

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