Cable laying device and method for immersed fuel pump in liquid cargo tank

Abstract

The invention discloses a cable laying device and method for an immersed fuel pump in a liquid cargo tank, the cable laying device comprises a pump tower structure pipe column, the top of the pump tower structure pipe column penetrates through an LNG tank combined dome, and a cable can enter the liquid cargo tank through the pump tower structure pipe column to be connected with a fuel pump. A plurality of installation supports used for installing cables are arranged in the pump tower structure pipe column in a sliding mode, each installation support comprises a fixing clamp set capable of clamping the cables, every two adjacent installation supports are connected through a connecting rope, and the installation supports at the head ends and the tail ends of the cables are connected through connecting ropes. The cable laying device is adopted in the cable laying method. The device is suitable for liquid cargo tanks of all models, the laying length of the cable is reduced, the influence of shaking of liquid in the liquid cargo tank on the cable is reduced, the operation reliability and safety of the immersed fuel pump in the liquid cargo tank are guaranteed, and the cable laying work of the immersed fuel pump in the LNG tank is safe, simple and convenient.

Description

Technical Field

[0001] The invention relates to the field of shipbuilding, and in particular to a device and method for laying cables of a submerged fuel pump in a liquid cargo tank. Background Art

[0002] In LNG carriers and LNG powered ships, the fuel pump is usually submerged in the cargo tank, and the cable of the fuel pump is usually laid along the bulkhead of the cargo tank. This cable laying method requires a long cable to be laid along the bulkhead, which increases the cable laying cost. However, the bulkhead of some cargo tanks is not suitable for laying cables, so the cables can only be hung in the cargo tank to be in direct contact with LNG. The cables in direct contact with LNG are easily affected by the sway of LNG during the operation of the ship, resulting in poor contact between the fuel pump and the cable, reducing the reliability of the operation of the submerged fuel pump in the cargo tank and increasing the number of maintenance of the cargo tank. Summary of the invention

[0003] In view of the defects existing in the prior art, the present application provides a cable laying device and method for an immersible fuel pump in a liquid cargo tank, so as to solve the technical problems in the prior art such as high cost of cable laying of the immersible fuel pump in the liquid cargo tank and susceptibility to the influence of LNG sway.

[0004] In order to achieve the purpose of the above invention, the technical solution provided by the present invention is as follows:

[0005] A cable laying device for an immersed fuel pump in a liquid cargo tank comprises a pump tower structure pipe column with a top passing through a combined dome of an LNG tank, through which a cable can enter the liquid cargo tank and be connected to a fuel pump, a plurality of mounting brackets for mounting cables are slidably arranged in the pump tower structure pipe column, the mounting brackets comprise a fixing clamp group for clamping the cables, adjacent mounting brackets are connected by a connecting rope, and the mounting brackets at both ends of the cable are connected by a connecting rope.

[0006] In one embodiment, the mounting bracket further comprises a slider assembly, the fixing clamp assembly is arranged 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 assembly are detachably connected via fasteners.

[0007] In one embodiment, the fixing clamp group includes two first fixing clamp blocks and one second fixing clamp block, the first fixing clamp block and the second fixing clamp block are both rectangular, the length of the first fixing clamp block is smaller than the length of the second fixing clamp block, the first fixing clamp block and the second fixing clamp block are both arranged perpendicular to the inner wall of the pump tower structure pipe column, the two first fixing clamp blocks are symmetrically arranged on the front and rear sides of the second fixing clamp block, the two first fixing clamp blocks are detachably connected to the second fixing clamp block by fasteners, and when the first fixing clamp block is connected to the second fixing clamp block, the cable can be clamped between the first fixing clamp block and the second fixing clamp block.

[0008] In one embodiment, the opposite surfaces of the first fixing clamp block and the opposite surfaces of the second fixing clamp block are both provided with a plurality of arc grooves, and when the fastener connects the first fixing clamp block and the second fixing clamp block, the cable is embedded in the space formed by the arc grooves of the first fixing clamp block and the arc grooves of the second fixing clamp block.

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

[0010] In one embodiment, the slider assembly includes two sliders with the same structure, and the two sliders 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 open groove. When the fasteners connect the two sliders, the fixing clamp group is clamped in the space formed by the opening grooves of the two sliders.

[0011] In one embodiment, the arc angle of the circular arc edge is less than ninety degrees, and the open groove is a groove with one side being stepped.

[0012] In one embodiment, the mounting bracket also includes a hanging ring plate, which is provided with three vertically distributed through holes, the first vertical through hole is used for passing a connecting rope connecting adjacent mounting brackets, the second vertical through hole is used for fixing the hanging ring plate to the first fixed clamp block, and the third vertical through hole is used for passing a connecting rope connecting the upper and lower mounting brackets.

[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, the connecting rope is a steel wire rope, and the mounting brackets on the cable are evenly distributed.

[0014] The present application also provides a method for laying cables for a submerged fuel pump in a liquid cargo tank, using the above-mentioned cable laying device, comprising the following steps:

[0015] S1. Arrange the cables and clamp multiple mounting brackets on the cables;

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

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

[0018] S4: Insert the connecting rope in S3 from the top inlet of the LNG tank pump tower pipe column and pass it out from the bottom of the LNG tank pump tower pipe column to smoothly pass the cable into the pump tower structure pipe column;

[0019] S5: Pull the cable out from the bottom of the pump tower structure pipe column and connect it to the fuel pump. The cable at the top of the pump tower structure pipe column is passed through the cable interface on the pump tower structure pipe column and fixed, thus 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 the submerged fuel pump in the liquid cargo tank of the present invention includes a pump tower structure pipe column whose top passes through the combined dome of the LNG tank, so that the cable can enter the liquid cargo tank along the pump tower structure pipe column and connect with the fuel pump. It is not only suitable for all types of liquid cargo tanks, but also reduces the laying length of the cable, reduces the influence of the liquid sloshing in the liquid cargo tank on the cable, and ensures the reliability and safety of the operation of the submerged fuel pump in the liquid cargo tank. In the cable laying device of the present application, the connecting rope is used to limit the spacing displacement of the mounting bracket to ensure that the cable is not subjected to tensile force, and the cable direction and the connecting rope are pulled and protected by the mutual cooperation of the fixed clamp group and the slider assembly, so that the cable laying work of the submerged fuel pump in the LNG tank is safe and simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a cable laying device for a submerged fuel pump in a liquid cargo tank in an embodiment of the present application;

[0023] Figure 2 is a schematic diagram of a cable structure in which a mounting bracket is provided in an embodiment of the present application;

[0024] Figure 3 It is a top view of the connection point of the mounting bracket in the tower column in the embodiment of the present application;

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

[0026] Figure 5 is a top view schematic diagram of the mounting bracket in the embodiment of the present application;

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

[0028] Figure 7 is a top view of a fixing clip assembly in an embodiment of the present application;

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

[0030] Fig. 9 is a schematic structural diagram of a first fixed clamp block in an embodiment of the present application;

[0031] Fig.10 is a schematic structural diagram of a second fixed clamping block in an embodiment of the present application;

[0032] Fig.11 It is a schematic diagram of the structure of the hanging ring plate in the embodiment of the present application.

[0033] Figure numerals: 1. fuel pump; 2. mounting bracket; 3. pump tower structure pipe column; 4. LNG tank combined dome; 5. connecting rope; 6. cable; 7. fixing clamp group; 8. hanging ring; 9. fastener; 11. first fixing clamp block; 12. second fixing clamp block; 13. slider. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

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

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

[0037] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0038] In order to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings.

[0039] like Figure 1-11As described above, this embodiment provides a cable laying device for an immersed fuel pump in a liquid cargo tank, including a pump tower structure pipe column 3 whose top passes through the combined dome 4 of the LNG tank. The cable 6 can enter the liquid cargo tank through the pump tower structure pipe column 3 and be connected to the fuel pump 1. A plurality of mounting brackets 2 for installing the cable 6 are slidably arranged in the pump tower structure pipe column 3. The mounting bracket 2 includes a fixing clamp group 7 for clamping 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 pipe column 3. The mounting brackets 2 at the head and tail ends of the cable 6 are connected by connecting ropes 5 so that the cable can pass through the pump tower structure pipe column 3.

[0040] like Figure 2-7 As shown, the mounting bracket 2 also includes a slider assembly, a fixing clamp group 7 is arranged 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 group 7 are detachably connected by fasteners 9. Figure 7 As shown, the fixing clamp group 7 includes two first fixing clamps 10 and one second fixing clamp 11. The first fixing clamp 10 and the second fixing clamp 11 are both rectangular. The length of the first fixing clamp 10 is less than the length of the second fixing clamp 12. The first fixing clamp 10 and the second fixing clamp 12 are both arranged perpendicular to the inner wall of the pump tower structure pipe column 3. The two first fixing clamps 10 are symmetrically arranged on the front and rear sides of the second fixing clamp 12. The two first fixing clamps 10 are detachably connected to the second fixing clamp 12 by fasteners 9. When the first fixing clamp 10 is connected to the second fixing clamp 12, the cable 6 can be clamped between the first fixing clamp 10 and the second fixing clamp 12. In order to better clamp the cable 6, in this embodiment, the opposite surface of the first fixing clamp block 10 and the opposite surface of the second fixing clamp block 11 are both provided with a plurality of arc grooves, the arc of the arc grooves is less than ninety degrees, and when the fastener connects the first fixing clamp block 10 and the second fixing clamp block 12, the cable 6 is embedded in the space formed by the arc grooves of the first fixing clamp block 10 and the arc grooves of the second fixing clamp block 11. In this embodiment, the first fixing clamp block 10 and the second fixing clamp block 11 are both provided with three arc 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 sliders 13 of the same structure, and the two sliders 13 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 matching the inner wall of the pump tower structure column 3. In order to make the slider assembly as light as possible, the arc edge in this embodiment has an arc angle less than ninety degrees. An open groove is provided in the middle of the slider 13. When the fastener connects the two sliders 13, the fixing clamp group 7 is clamped in the space formed by the opening grooves of the two sliders 13. Among them, the open groove is a groove with a stepped shape on one side, so as to increase the connection strength between the sliders 13 while better limiting the movement of the first fixing clamp block 10 and the second fixing clamp block 12.

[0042] The fasteners in this embodiment include studs, nuts and washers, and the first fixing clamp block 10, the second fixing clamp block 12 and the slider are all provided with threaded through holes corresponding to the studs. After the studs pass through the threaded holes, the nuts are spot welded on the studs to prevent the fastener components from falling off and damaging the liquid cargo tank and the equipment inside the tank.

[0043] like Figure 4 , 5 As shown in FIG. 11 , the mounting bracket 2 further includes a hanging ring piece 8, and three vertically distributed through holes are arranged on the hanging ring piece 8. The first vertical through hole is used for passing the connecting rope 5 connecting the adjacent mounting brackets 2, the second vertical through hole is used for fixing the hanging ring piece 8 to the first fixing clamp block 10, and the third vertical through hole is used for passing the connecting rope 5 connecting the upper and lower mounting brackets 2. The length of the connecting rope 5 between the adjacent mounting brackets 2 is slightly greater than the length of the cable 6 arranged between the mounting brackets 2 to prevent the cable 6 from being damaged by the tensile force.

[0044] This embodiment provides a method for laying cables for a submerged fuel pump in a liquid cargo tank, using the above-mentioned device for laying cables for a submerged fuel pump in a liquid cargo tank, comprising the following steps:

[0045] S1, arranging the cables 6, and clamping a plurality of mounting brackets 2 on the cables 6;

[0046] S2, installing a guide connecting rope 5 between two adjacent mounting brackets 2, and passing the connecting rope 5 through the first vertical through hole on the hanging ring piece 8;

[0047] S3, installing the connecting rope 5 between the mounting brackets 2 at both ends of the cable 6, and passing the connecting rope 5 through the third vertical through hole on the inner hanging ring piece 8 of the mounting brackets 2 at both ends of the cable 6;

[0048] S4: Insert the connecting rope 5 in S3 from the top inlet of the LNG tank pump tower pipe column 3 and pass it out from the bottom, so as to smoothly pass the cable 6 into the pump tower structure pipe column 3;

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

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A cable laying device for a submerged fuel pump in a liquid cargo tank, characterized in that: It includes a pump tower structure pipe column with the top passing through the combined dome of the LNG tank. The cable can enter the liquid cargo tank through the pump tower structure pipe column and be connected to the fuel pump. A plurality of mounting brackets for installing the cables are slidably arranged in the pump tower structure pipe column. The mounting brackets include a fixing clamp group that can clamp the cables. Adjacent mounting brackets are connected by connecting ropes, and the mounting brackets at the head and tail ends of the cable are connected by connecting ropes.

2. The cable laying device for the submerged fuel pump in the liquid cargo tank according to claim 1, characterized in that: The mounting bracket also includes a slider assembly, the fixing clamp group is arranged inside the slider assembly, the slider assembly can slide along the inner wall of the pump tower structure pipe column, and the slider assembly and the fixing clamp group are detachably connected via fasteners.

3. The cable laying device for the submerged fuel pump in the liquid cargo tank according to claim 2, characterized in that: The fixing clamp group includes two first fixing clamp blocks and one second fixing clamp block, the first fixing clamp block and the second fixing clamp block are both rectangular, the length of the first fixing clamp block is smaller than the length of the second fixing clamp block, the first fixing clamp block and the second fixing clamp block are both arranged perpendicular to the inner wall of the pump tower structure pipe column, the two first fixing clamp blocks are symmetrically arranged on the front and rear sides of the second fixing clamp block, the two first fixing clamp blocks are detachably connected to the second fixing clamp block by fasteners, and when the first fixing clamp block is connected to the second fixing clamp block, the cable can be clamped between the first fixing clamp block and the second fixing clamp block.

4. The cable laying device for the submerged fuel pump in the liquid cargo tank according to claim 3, characterized in that: The opposite surfaces of the first fixing clamp block and the opposite surfaces of the second fixing clamp block are both provided with a plurality of arc grooves. When the fastener connects the first fixing clamp block and the second fixing clamp block, the cable is embedded in the space formed by the arc grooves of the first fixing clamp block and the arc grooves of the second fixing clamp block.

5. The cable laying device for the submerged fuel pump in the liquid cargo tank according to claim 4, characterized in that: The arc angle of the arc-shaped groove is less than ninety degrees.

6. The cable laying device for the submerged fuel pump in the liquid cargo tank according to claim 3, characterized in that: The slider assembly includes two sliders with the same structure, and the two sliders 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 open groove. When the fasteners connect the two sliders, the fixing clamp group is clamped in the space formed by the opening grooves of the two sliders.

7. The cable laying device for the submerged fuel pump in the liquid cargo tank according to claim 6, characterized in that: The arc angle of the circular arc edge is less than ninety degrees, and the open groove is a groove with one side being stepped.

8. The cable laying device for the submerged fuel pump in the liquid cargo tank according to claim 3, characterized in that: The mounting bracket also includes a hanging ring plate, which is provided with three vertically distributed through holes. The first vertical through hole is used for passing a connecting rope connecting adjacent mounting brackets, the second vertical through hole is used for fixing the hanging ring plate to the first fixed clamp block, and the third vertical through hole is used for passing a connecting rope connecting the upper and lower mounting brackets.

9. The cable laying device for a submerged fuel pump in a liquid cargo tank according to claim 1, characterized in that: 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 evenly distributed.

10. A method for laying cables for a submerged fuel pump in a liquid cargo tank, characterized in that: The cable laying device according to any one of claims 1 to 10 comprises the following steps: S1. Arrange the cables and clamp multiple mounting brackets on the cables; S2. Install a guide connecting rope between two adjacent mounting brackets; S3. Install the connecting rope between the mounting brackets at both ends of the cable; S4: Insert the connecting rope in S3 from the top inlet of the LNG tank pump tower pipe column and pass it out from the bottom of the LNG tank pump tower pipe column to smoothly pass the cable into the pump tower structure pipe column; S5: Pull the cable out from the bottom of the pump tower structure pipe column and connect it to the fuel pump. The cable at the top of the pump tower structure pipe column is passed through the cable interface on the pump tower structure pipe column and fixed, thus completing the cable installation.

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