Cable holding clamp for cable installation in offshore structures

Abstract

The present invention relates to a cable holding clamp for installing cables in offshore structures, and more specifically, to a cable holding clamp that is integrally formed within a hang-off assembly for fixing cables within a structure when installing offshore cables in various offshore structures. By allowing the cable to be supported and fixed within the structure for a pre-set time in advance without a hang-off assembly, the waiting time of the lifting vessel lifting the cable until the hang-off assembly is installed can be shortened without separate fixing work or additional support equipment. Additionally, a groove is formed on the inner circumference to further secure the fixation of the cable, and the clamp is manufactured from MC nylon material suitable for the marine environment to solve corrosion problems while ensuring lightweight, insulation, and corrosion resistance.

Description

Technology Field

[0001] The present invention relates to a cable holding clamp that is integrally installed within a hang-off assembly used to secure a cable when securing a cable to an object at sea, thereby enabling the cable to be supported and secured before the installation of the hang-off assembly, and thus reducing the waiting time of the lifting vessel and increasing work efficiency. Background Technology

[0002] The anchoring of submarine cables inside conventional offshore wind turbines was achieved solely through hang-off assemblies.

[0003] The assembly of the hang-off takes about 2 hours. According to the work sequence, the assembly of the hang-off must be carried out while the submarine cable lifting vessel has pulled the submarine cable above the water surface, and during this time, the submarine cable lifting vessel must remain in the lifted state for the duration of the operation.

[0004] There are multiple offshore wind turbines, and due to the nature of submarine cables requiring continuity in installation, massive time, manpower, and costs are consumed as massive cable lifting vessels must remain on standby for the entire duration of the hang-off assembly process; furthermore, operations are inevitably delayed if sea weather conditions are poor. (In other words, since the submarine cable could only be secured and moved on to the next stage after all assembly processes of the hang-off assembly were completed, having separate equipment capable of holding the cable for a short period would allow the remaining work to proceed by transferring the cable to smaller boats after the lifting vessel has departed, once the cable is temporarily secured.)

[0005] Accordingly, there is an urgent need to develop a device capable of supporting and securing such submarine cables for a short period or for a set duration, without the waiting time of the lifting vessel or the installation of the hang-off assembly, or before the installation of the hang-off assembly. Prior art literature

[0006] Republic of Korea Registered Patent Publication No. 10-1467113 (Registered Nov. 24, 2014) The problem to be solved

[0007] The present invention has been devised to solve the above-mentioned problems and is a cable holding clamp used when fixing a cable within an installation target at sea, which is integrally formed within a hang-off assembly used for fixing.

[0008] The invention provides a cable holding clamp for installing cables in offshore structures, wherein first and second clamps having the same shape are tightened through a fastener to wrap around and secure the outer circumference of the cable, and a separate groove is formed on the inner circumference to prevent slippage on the contact surface with the cable. It is manufactured from MC nylon material for suitability in marine environments to solve corrosion problems while ensuring lightweight, insulation, and corrosion resistance. Furthermore, it allows the cable to be held and secured for a pre-set time without a hang-off assembly, thereby reducing the waiting time of the lifting vessel holding the cable and increasing work efficiency without the need for separate fixing work or additional support equipment.

[0009] Other objects and advantages of the present invention will be described below and will be known from the embodiments of the present invention. Additionally, the objects and advantages of the present invention may be realized by means and combinations set forth in the claims. means of solving the problem

[0010] The present invention is a means for solving the above-mentioned problems,

[0011] When installing a cable (C) within an offshore tower or offshore wind structure, which is the object to be installed, it is installed and used within a hang-off assembly (30) that fixes the cable (C) within the object to be installed.

[0012] With the cable (C) suspended vertically through the center of the base plate (10) within the installation target by the marine crane of the submarine cable lifting vessel, the cable holding clamp (20) wraps around the outer circumference of the cable (C) on the upper surface of the base plate (10) and fixes its position.

[0013] The above-mentioned hang-off assembly (30) is characterized by the fact that, prior to installation, the cable (C) is temporarily supported and fixed for a pre-set time, thereby reducing the working time and operating costs of the lifting vessel and marine crane, and allowing the cable (C) to be stably held without the need for separate cable (C) fixing work or the installation of a fixing device, while preventing the cable (C) from moving out of position within the object to be installed. Effects of the invention

[0014] As described above, the present invention has the effect of supporting and fixing a submarine cable for a preset time prior to the waiting time of the lifting vessel and the installation of the hang-off assembly, thereby increasing work efficiency and stability and reducing operating costs.

[0015] In addition, the present invention has an efficient structure in which a cable holding clamp is secured internally within a hang-off assembly, which has the effect of stably gripping the cable and preventing displacement during installation.

[0016] In addition, the present invention uses MC nylon material for the cable holding clamp, thereby providing the effects of corrosion prevention in marine environments, lightweighting, insulation, and corrosion resistance. Brief explanation of the drawing

[0017] FIGS. 1 to 3 are drawings of an embodiment showing a cable holding clamp according to the present invention. FIGS. 4 and 5 are drawings of an embodiment showing a cable holding clamp according to the present invention fixed to a cable. FIG. 6 is a drawing of an embodiment showing a cable holding clamp according to the present invention assembled with a hang-off assembly. FIG. 7 is a drawing of an embodiment showing a hang-off assembly in which a cable holding clamp according to the present invention is mounted internally. FIG. 8 is a drawing of an embodiment showing a submarine cable fixing force test conducted at KOMERI (Korea Marine Equipment Research Institute) to ensure the fixing force of the cable holding clamp according to the present invention. FIGS. 9 to FIGS. 12 are test results of passing the accredited test of FIG. 9. Specific details for implementing the invention

[0018] Before describing various embodiments of the present invention in detail, it will be understood that the application is not limited to the details of the configuration and arrangement of components described in the following detailed description or illustrated in the drawings. The present invention may be embodied and practiced in other embodiments and may be carried out in various ways. Furthermore, it will be understood that the expressions and terms used herein regarding device or element orientations (e.g., "front," "back," "up," "down," "top," "bottom," "left," "right," "lateral") are used merely to simplify the description of the present invention and do not indicate or imply that the related device or element must simply have a specific orientation. Additionally, terms such as "first" and "second" are used in this and the appended claims for illustrative purposes and are not intended to indicate or imply relative importance or intent.

[0020] The present invention has the following features to achieve the above objective.

[0021] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, and should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0022] Therefore, it should be understood that the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, and that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0025] Hereinafter, a cable holding clamp for installing a cable of a marine structure according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 12.

[0027] The cable holding clamp for installing a cable in an offshore structure according to the present invention relates to a cable holding clamp that is integrally installed inside a hang-off assembly (30) used when installing a cable (submarine cable, etc., C) within an offshore tower or offshore wind power structure (various offshore structures) that is the object of installation. The cable holding clamp (20) can temporarily support and fix the cable suspended by the cable lifting vessel within the structure for a pre-set time (e.g., 1 to 2 hours) before the installation of the hang-off assembly (30), thereby reducing the working time and operating costs of the lifting vessel and offshore crane, and can stably hold the cable (C) while preventing it from moving out of position within the object of installation without the need for separate cable (C) fixing work or the installation of a fixing device.

[0029] The above-mentioned cable holding clamp is described in detail as follows.

[0030] The above cable holding clamp (20) is a fixing device that wraps around the outer circumference of the cable (C) on the upper surface of the base plate (10) and fixes its position while the cable (C) is suspended and positioned in a state where it is vertically penetrating the center of the base plate (10) within the installation target by the marine crane of the submarine cable lifting vessel.

[0031] To explain the cable holding clamp (20) in more detail, the cable holding clamp (20) is composed of a first clamp (21), a second clamp (22), and a fastener (23).

[0032] The first clamp (21) is a clamp having a semicircular cross-section or a 'C'-shaped cross-section to correspond to and wrap around the outer circumference of the cable (C).

[0033] The second clamp (22) has the same shape as the first clamp (21) described above and is positioned opposite the first clamp (21) to wrap around the outer circumference of the cable (C). It is a clamp positioned opposite the first clamp (21) to wrap around the cable (C) while maintaining a distance between the two ends so that they do not come into contact. That is, the first and second clamps (21, 22) have the same shape, but when wrapping around the outer circumference of the cable (C), the ends of the first and second clamps (21, 22) are spaced apart so that they do not come into contact with each other. This is intended to allow the distance between the ends of the first and second clamps (21, 22) to narrow or widen depending on the size (thickness) of the cable (C).

[0034] The above-mentioned plurality of fasteners (23) are fixing means for connecting the left and right spacing spaces (24) of the first and second clamps (21, 22) to each other, and are in the form of long bolts with screw threads formed on their outer circumferences, and have a shape in which nuts are tightened at each end.

[0035] In the present invention, three such fasteners (23) are formed on each side of the first and second clamps (21, 22) (of course, the number of fasteners (23) can be varied depending on the user). In order to securely fix the cable (C) using the cable holding clamp (20), the left fastener and right fastener located in the middle of the first and second clamps (21, 22), the right fastener and left fastener located at the top of the first and second clamps (21, 22), and the right fastener and left fastener located at the bottom of the first and second clamps (21, 22) are tightened step by step using a torque wrench. At this time, the tightening operation is performed repeatedly until a clicking sound is continuously produced from the torque wrench, and the torque sequencer, which is the torque adjustment range of the torque wrench, is set to 220~260 Nm. (Based on 7 tons for a maximum cable (C) length of 50M, and 21 tons with a safety factor of 3 times.)

[0036] The calculation formula of the above-mentioned torque sequencer will be explained below with reference.

[0037] The above fastener (23) consists of a bolt, a nut, a flat washer, and a spring washer.

[0038] (1) Bolt used M16 × 2.09, strength 10.9 (actual strength).

[0039] At strength 10.9, yield load: 14.4 ton (141,300 N), breaking load: 16 ton (157,000 N).

[0040] (2) Coefficient of friction (μ) = 0.5 (when internal irregular structure)

[0041] (3) It is a structure that is supported by frictional force for the purpose of preventing cable slippage.

[0042] F 마찰력 = μ × F 축력

[0043] F 축력 = F 마찰력 / μ = 3,500kgf / 0.5 = 7,000kgf

[0044] (Based on 21 tons, there are 6 bolts, so 21 tons / 6 = 3.5 tons (per bolt))

[0045] 7,000 × 9.8 = 68,600N

[0046] 4) Tightening torque T = k × F × d (Steel bolt k=0.2)

[0047] (Torque coefficient) × (Bolt axial force (N)) × Bolt nominal diameter (m) =

[0048] 0.2 ×68,600N × 0.016m = 219.5Nm

[0049] Therefore, at 21 tons, the tightening torque is 219.5 Nm

[0050] If you apply the above formula,

[0051] The tightening torque is 261.3 Nm at 25 tons.

[0052] The tightening torque is 313.6 Nm at 30 tons

[0053] The tightening torque is 418.1 Nm at 40 tons.

[0054] In conclusion, the appropriate tightening torque is 219.5 ~ 261.3 Nm (21 ton ~ 25 ton),

[0055] It is approximately 220 to 262 N.m.

[0057] In addition, the cable holding clamp (20) in the present invention has a groove (25) formed in a transverse direction perpendicular to the vertically erected cable (C) on the inner circumference that contacts the cable (C), and the groove (25) is formed continuously in a downward direction like screw threads to form an anti-slip portion (26), thereby preventing slippage by engaging with the outer sheath of the cable (C) and reducing the cable holding clamp (20) and damage to the cable (C) through the load distribution effect of the cable (C). The protruding portion between the grooves (25) in the anti-slip portion (26) forms a flat portion (27) that makes surface contact with the outer circumference of the cable (C), and has a trapezoidal shape of a projection (28) that gradually narrows toward the cable (C).

[0058] In addition, the cable holding clamp (20) is made of MC (Mono Cast) nylon material to provide corrosion prevention, lightweighting, insulation, and corrosion resistance in a marine environment.

[0059] This MC Nylon has excellent tensile strength (81 MPa) and tensile modulus (3.2 GPa), and is about one-third lighter than metal, with excellent wear resistance, salt water resistance, and insulation properties, so it does not rust and is environmentally friendly due to its high recyclability.

[0060] With a lightweight and non-corrosive structure, corrosion and rust do not occur even under conditions of exposure to salt and moisture in the marine environment, and the weight is reduced by about 40~80% compared to aluminum (Al 2.7g / cm³) and SCM440 (7.8g / cm³), thereby reducing the operating load of marine cranes, improving work efficiency, and reducing maintenance costs.

[0061] The aforementioned tensile strength of 81 MPa is similar to that of general structural aluminum (approx. 90 MPa), ensuring sufficient structural rigidity when gripping the cable (C) and minimizing deformation caused by cable (C) load, vibration, and waves (sea shaking).

[0062] In addition, since the cable holding clamp (20) is formed of MC (Mono Cast) nylon material, it has a high elastic recovery force with a tensile elongation of 35% and can be restored without cracking when subjected to impact load or repeated fastening, so it has the effect of maintaining stability even with vibration and changes in cable (C) tension when installing a marine tower.

[0063] item MC Nylon Aluminum (AL) / Special Steel (SCM440) note weight About 1 / 3 to 1 / 6 High weight increases risk during offshore operations Easy to install and handle Corrosion resistance Excellent (non-metallic) Corrosion may occur at sea, requiring regular maintenance. No corrosion or painting required insulating Excellent electrical insulation Conductive presence, insulation supplement required Improvement of electrical safety eco-friendliness Recyclable Surface treatment (plating / painting) required, environmental burden No marine pollution-causing factors unit price Cheap High material and processing costs

[0067] In the following, a hang-off assembly (30) for mounting the cable holding clamp (20) of the present invention inside will be described.

[0068] The above-described hang-off assembly (30) is installed by wrapping around the outside of the cable holding clamp (20) so that the aforementioned cable holding clamp (20) is embedded therein, and its lower part is fixedly installed on the base plate (10), thereby being a fixing device that fixes the position of the cable (C) while keeping it float.

[0069] In the case of such a hang-off assembly (30), it consists of a first lower flange (31), a second lower flange (35), a joint bolt (36), an upper flange portion (37), a rain injection portion, a ground wire, and an AI automatic monitoring sensor installed in the hang-off assembly (30).

[0070] The first lower flange (31) is a part that surrounds the cable (C) while forming an insertion space (A) inside into which the first clamp (21), which is half of the cable holding clamp (20), is inserted, and is composed of a body part (32) and upper and lower flanges (33, 34) located on the upper and lower sides of the body part (32).

[0071] The second lower flange (35) has the same shape as the first lower flange (31) and surrounds the cable (C) while forming an insertion space (A) inside into which the second clamp (22), which is the remaining half of the cable holding clamp (20), is inserted. By being combined with the first lower flange (31), it has a cylindrical shape with plate-shaped flanges formed on the left and right sides. The assembled first and second lower flanges (31, 35) must have their upper and lower ends closed so that the cable holding clamp (30), which is mounted in the internal insertion space (A), does not fall out downwards (the lower part of the cable holding clamp (20) is placed on the upper surface of the lower flange (34)), while having a shape in which only a central hole is drilled in the upper and lower center so that the cable (C) can vertically penetrate the center of the first and second lower flanges (31, 35).

[0072] According to an embodiment of the user, the hang-off assembly (30) may be further provided with a fixing hole (41) and a fixing means (42) that fix the cable holding clamp (20) and the hang-off assembly (30) by penetrating the outer circumference of the first lower flange (31) or the second lower flange (35) or the first and second lower flanges to the outer circumference of the internal cable holding clamp (20), and being fastened to a corresponding groove (40) formed on the outer circumference of the cable holding clamp (20), more specifically on the outer circumference of the first clamp (21) or the second clamp (22) or the first and second clamps (21, 22).

[0073] Additionally, an inwardly recessed keyway (43) is formed at the lower outer circumference of either the first clamp (21) or the second clamp (22), or at each of the first clamp (21) and the second clamp (22). When the first and second clamps (21, 22) are mounted within the hang-off assembly (30), a key (44) welded to the inner lower portions of the first lower flange (31) and the second lower flange (35) constituting the hang-off assembly (30) corresponds to and is joined, thereby enabling the support of the load of the cable (C). More specifically, the presence of such a key (44) and keyway (43) enables a rapid and accurate connection between the cable holding clamp (20) and the hang-off assembly (30) in a marine cable work environment where shaking due to waves is severe.

[0074] The joint bolt (36) is a plurality of fixing bolts (fixing means) that connect and fix the body portions (32) of the first and second lower flanges to each other, and connect and fix the second lower flange (35) and the base plate (10).

[0075] The upper flange portion (37) is configured in the form of a plate in which the wire sheath (C1), which is exposed to the outside by removing the outer serving layer of the cable (C) from the upper surface of the aforementioned upper flange (33), is spread out at a preset interval on the upper surface of the upper flange (33), cut to match the end of the upper flange (33), and then fixed to the upper flange (33) on the upper surface of the wire sheath (C1) with a joint bolt (36). These upper flange portions (37) are composed of a first upper flange in the shape of a semicircle and a second upper flange in the shape of a semicircle that are opposite each other and form a circular plate, and the connection direction is rotated 90 degrees so as not to be the same as the installation direction of the first lower flange (31) and the second lower flange (35) so that they are assembled facing each other on the upper flange (33). (That is, if the first lower flange (31) and the second lower flange (35) are connected to each other in the front and rear directions, the first upper flange and the second upper flange are connected to each other in the left and right directions rather than in the front and rear directions.)

[0076] In addition, regarding the multiple joint bolts (36) used for connecting and fixing the second lower flange (35, more specifically the lower flange (34)) and the base plate (10), and connecting and fixing the upper flange (33) and the upper flange part (37), the multiple joint bolts (36) are arranged and fixed in a circular pattern, and the joint bolts (36) are tightened and fixed in the order of upper, lower, right, and left in a cross (+) shape centered on the center of the hang-off assembly, and the cross-shaped tightening is performed multiple times while moving clockwise by a preset angle, and the torque sequencer, which is the torque adjustment range of the torque wrench tightening the joint bolts (36), is 220~260 Nm, and the tightening operation is performed repeatedly at least three times until a continuous clicking sound is heard from the torque wrench.

[0077] (As shown in the example below, numbers 1 through 12 represent the positions where the joint bolts (36) are installed and indicate the tightening order. As seen in the example below, after tightening number 1, the opposite diagonal number 2 is tightened, and numbers 3 and 4, which form a cross shape, are tightened sequentially to perform the cross-shaped tightening operation. Afterwards, numbers 5, 6, 7, and 8 need to be tightened. The cross shape of numbers 1, 2, 3, and 4 is rotated clockwise by a preset angle to become the positions of numbers 5, 6, 7, and 8.)

[0078] [example]

[0079]

[0080] The above-mentioned lane injection section is configured such that resin is injected through the optical fiber (C2) to a preset injection depth at the center of the upper flange where the optical fiber (C2) is exposed to the outside through a separate resin injection device.

[0081] The above grounding line is a grounding line connected to the upper flange portion (37) and the first and second lower flanges (31, 35).

[0082] The above AI automatic monitoring sensor (not shown) is a device that is pre-installed at a preset location within the hang-off assembly (30) or the object to be installed where the hang-off assembly (30) and the cable holder clamp (20) are installed, and allows for various checks to be made via a display from a control room on land or outside, such as whether the joint bolt (36) in the hang-off assembly (30) has loosened or if corrosion has occurred, or if there are any problems in supporting and fixing the cable (C). Depending on the user's embodiment, a camera and various sensors may be the target.

[0085] The installation method of the entire cable holding clamp (20) and the hang-off assembly (30) used together with the cable holding clamp (20) of the present invention is described as follows.

[0086] 1. A step (S100) in which a cable (C) is positioned upright in the center of a base plate (10) inside an offshore tower or offshore wind power structure, which is the object to be installed, via a submarine cable lifting vessel;

[0087] 2. A step (S200) in which a cable holding clamp (20) is assembled and mounted on the outer circumference of the cable (C) on the upper part of the base plate (10) within the object to be installed, through a worker or work machine within the object to be installed, thereby fixing and supporting the cable (C);

[0088] 3. A step (S300) in which a cable (C) is fixedly supported by a hang-off assembly (30) having its lower end fixedly installed on the base plate (10), while wrapping the cable holding clamp (20) so as to be installed on the upper part of the base plate (10) within the object to be installed through a worker or work machine within the object to be installed;

[0089] 4. A step (S400) in which, through a worker or work machine within the object to be installed, the outer sheath is removed from the cable exposed above the hang-off assembly (30) and the wire sheath is spread out and arranged at preset intervals on the upper surface of the hang-off assembly (30), wherein the ends of the wire sheath are cut to align with the outer line of the top of the hang-off assembly (30);

[0090] 5. A step (S500) in which an upper flange portion (37) is correspondingly assembled to the upper part of the wire outer casing through a worker or work machine within the object to be installed;

[0091] 6. A step (S600) of injecting resin into the hang-off assembly (30) to a preset depth inside through the wires vertically exposed in the center of the upper flange portion (37) via a resin injection device within the object to be installed;

[0092] 7. A step (S700) in which a grounding line is installed on the hang-off assembly (30) and the upper flange portion (37) through a worker or work machine within the object to be installed;

[0093] 8. A step (S800) in which an AI automatic monitoring sensor is installed on the hang-off assembly (30) to check the assembly status and installation status of the hang-off assembly (30);

[0094] It is composed of such that steps S100 through S800 can be carried out sequentially.

[0098] As described above, although the present invention has been explained by limited embodiments and drawings, the present invention is not limited thereto and it is obvious that various modifications and changes are possible within the scope of the technical spirit of the present invention and the equivalent scope of the claims described below by those skilled in the art to which the present invention belongs. Explanation of the symbols

[0099] 10: Base plate 20: Cable holding clamp 21: 1st clamp 22: 2nd clamp 23: Fastener 24: Separation distance 25: Home 26: Anti-slip part 27: Flat part 28: Protrusion 30: Hang-off assembly 31: First lower flange 32: Body part 33: Top flange 34: Bottom flange 35: Second bottom flange 36: Joint bolt 37: Upper flange 40: Corresponding groove 41: Fixing hole 42: Fixing means 43: Keyway 44: Key C : Cable C1: Steel wire sheath C2: Optical fiber

Claims

Claim 1 When installing a cable (C) within an installation target, such as an offshore tower or offshore wind power structure, the cable (C) is installed and used within a hang-off assembly (30) that fixes the cable (C) within the installation target. When the cable (C) is suspended vertically through the center of the base plate (10) within the installation target by a marine crane of a submarine cable lifting vessel, the cable (C) is positioned by wrapping around the outer circumference of the cable (C) on the upper surface of the base plate (10) and fixing its position. By temporarily supporting and fixing the cable (C) for a pre-set time prior to the installation of the hang-off assembly (30), the working time and operating costs of the lifting vessel and marine crane can be reduced, and the cable (C) can be stably held while preventing displacement within the installation target without the need for separate cable fixing work or the installation of a fixing device. The cable holding clamp (20) has a semicircular cross-section to correspond to and wrap around the outer circumference of the cable (C). It is composed of: a first clamp (21); a second clamp (22) having the same shape as the first clamp (21), positioned opposite the first clamp (21) to wrap around the outer circumference of the cable (C), and positioned opposite the first clamp (21) to wrap around the cable (C) while maintaining a distance between the two sides so as not to come into contact; and a plurality of fasteners (23) connecting the left and right spacing spaces (24) of the first and second clamps (21, 22) to each other. This allows for adjustment of the spacing between the first and second clamps (21, 22) to narrow or widen, thereby enabling the cable (C) to be wrapped around and fixed according to its thickness. In order to securely fix the cable (C) using the cable holding clamp (20), the left and right sides located in the middle of the first and second clamps (21, 22) The fasteners are tightened step by step with a torque wrench in the order of the fastener, the right and left fasteners located at the top of the first and second clamps (21, 22), and the right and left fasteners located at the bottom of the first and second clamps (21, 22).Tightening is performed repeatedly until a continuous clicking sound is produced from the torque wrench, and the torque sequencer, which is the torque adjustment range of the torque wrench, is 220 to 260 Nm. A keyway (43) that is recessed inward is formed at the lower outer circumference of the first clamp (21) or the second clamp (22). When the first and second clamps (21, 22) are installed inside the hang-off assembly (30), a key (44) formed on the inner bottom surface of the hang-off assembly (30) corresponds to and is fastened, allowing the cable holding clamp (20) and the hang-off assembly (30) to be quickly and accurately coupled to each other, thereby enabling the cable (C) to support the load. A groove (25) is formed in the inner circumference of the cable holding clamp (20) that contacts the cable (C), in a transverse direction perpendicular to the vertically erected cable (C), and a plurality of grooves (25) are formed in the downward direction. A cable holding clamp for installing a cable in a marine structure, characterized by the fact that the anti-slip portion (26) is formed by being continuously formed like screw threads, thereby preventing slippage by engaging with the outer sheath of the cable (C) and reducing damage to the cable (C) and preventing the cable holding clamp (20) from changing due to the load distribution effect of the cable (C), and the protruding portion between the grooves (25) in the anti-slip portion (26) forms a flat portion (27) that makes surface contact with the outer circumference of the cable (C), and has a trapezoidal shape of a projection (28) that gradually narrows toward the cable (C), and the cable holding clamp (20) is made of MC (Mono Cast) nylon material, thereby having the effects of corrosion prevention, lightweighting, insulation, and corrosion resistance in a marine environment. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 delete

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