Erosion resistant control cable for marine use

Abstract

The present application relates to cable technical field, particularly to a kind of marine erosion-resistant control cable, including cable core and inner heat sleeve being sequentially sleeved from inside to outside, multiple first installation holes for installing cable core and multiple second cavities of different sizes are opened on inner heat sleeve, first installation hole forms arc-shaped protrusion in cavity, protrusion is connected with each first cavity, and multiple second cavities are sequentially distributed in the circumferential direction of protrusion, the size of second cavity is negatively correlated with the distance from the part of protrusion located in second cavity to the axis of inner heat sleeve, second cavity is filled with inert gas, and the pressure in second cavity is positively correlated with the size of second cavity;Second cavity is set, so that the heat of cable core periphery is more evenly emitted through the periphery of inner heat sleeve, improve the heat dissipation uniformity of the periphery of first installation hole;The different pressure in second cavity makes the heat dissipation speed in each second cavity substantially consistent, further improves the heat dissipation uniformity of cable core.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cables, in particular to a marine erosion-resistant control cable. BACKGROUND

[0002] In today's rapidly developing shipbuilding industry, marine control cables, as a crucial component of the ship's electrical system, directly affect the safe operation and service life of the ship.

[0003] Currently, the existing erosion-resistant marine control cables have some problems to be solved in practical application. Due to the complex and changeable operating environment of the ship, especially in the marine environment, the cable is subjected to the test of seawater erosion, humidity, high temperature and other adverse factors. However, the existing erosion-resistant marine control cables have certain limitations in design and manufacturing.

[0004] One of the more prominent problems is that due to the different number of cable inner cores, the distance from the outer part of the inner core at each position is different. In the process of cable operation, heat is generated by the current passing through the core, and this distance difference will cause uneven heat transfer inside. The part of the core closer to the outside is relatively easier to dissipate heat, while the part farther away is difficult to dissipate heat, thereby affecting the overall heat dissipation effect. Uneven heat distribution will cause local thermal stress inside the cable, and long-term in this state will cause damage to the insulation layer and other structures of the cable, reducing the service life of the cable; at the same time, the cable is prone to unstable performance due to uneven heat distribution, which poses a safety hazard. SUMMARY

[0005] Therefore, it is necessary to provide a marine erosion-resistant control cable to solve the problem of weak heat dissipation of the current multi-core cable.

[0006] The above-mentioned purpose is achieved by the following technical solutions:

[0007] The utility model provides an anti-erosion control cable for ship, which comprises a cable core, an inner protective layer and an outer protective layer from inside to outside, the inner protective layer comprises an inner heat conducting sleeve, the axis of the cable core is parallel to the axis of the inner heat conducting sleeve, a plurality of first installation holes for installing the cable core and cavities are arranged on the inner heat conducting sleeve, the first installation holes are uniformly distributed around the axis of the inner heat conducting sleeve, the number of the cavities is the same as that of the first installation holes, each cavity is located between two radial lines of the inner heat conducting sleeve passing through the centers of adjacent first installation holes, each cavity is an independent space, the first installation holes form arc protrusions in the cavities, a first partition plate is arranged in each cavity, the first partition plate divides the cavity into two first cavities which are symmetrical in the circumferential direction of the inner heat conducting sleeve, a plurality of second partition plates are arranged in each first cavity, one side of each second partition plate is connected with the inner wall of the inner heat conducting sleeve, the other side of each second partition plate is connected with the protrusion in the corresponding cavity, the second partition plates divide the corresponding first cavity into a plurality of second cavities which are distributed around the circumferential direction of the protrusion, the size of the second cavity is negatively correlated with the distance from the part of the protrusion in the second cavity to the axis of the inner heat conducting sleeve, the second cavities are filled with inert gas, and the pressure in the second cavities is positively correlated with the size of the second cavities; the outer protective layer is used for protecting the inner protective layer.

[0008] Preferably, the sides of the plurality of second partition plates connected with the protrusion are sequentially distributed along the circumferential direction of the protrusion, and the plurality of second partition plates equally divide the protrusion; the sides of the plurality of second partition plates connected with the inner wall of the inner heat conducting sleeve are sequentially distributed around the circumferential direction of the inner heat conducting sleeve, and the plurality of second partition plates equally divide the inner wall of the inner heat conducting sleeve in the corresponding first cavity.

[0009] Preferably, a second installation hole is arranged in the center of the inner heat conducting sleeve, the second installation hole is not communicated with the first installation holes and the cavities, and the second installation hole is used for installing a reinforcing core.

[0010] Preferably, a plurality of through grooves are arranged on the circumferential surface of the inner heat conducting sleeve, the number of the through grooves is the same as that of the first installation holes, each through groove is correspondingly arranged with a first installation hole, and the through groove penetrates the circumferential surface of the inner heat conducting sleeve along the radial direction of the inner heat conducting sleeve and is communicated with the corresponding first installation hole, and one of the through grooves penetrates the first installation hole and is communicated with the second installation hole.

[0011] Preferably, the inner heat conducting sleeve comprises a plurality of sector-shaped columns, the number of the sector-shaped columns is the same as that of the cable core, the plurality of sector-shaped columns can form a complete cylinder, a semicircular groove is arranged on the side of each two adjacent sector-shaped columns in the cylinder, the two semicircular grooves form a first installation hole, each cavity is arranged on one sector-shaped column, an arc groove is arranged in the center of each sector-shaped column, the arc groove is coaxial with the corresponding sector-shaped column, and the arc grooves on the plurality of sector-shaped columns after forming the cylinder form a second installation hole.

[0012] Preferably, the inner protective layer further comprises an outer heat conducting sleeve, the outer heat conducting sleeve is sleeved on the peripheral surface of the inner heat conducting sleeve, the inner heat conducting sleeve is internally provided with a plurality of third cavities, a third partition plate is arranged between two adjacent third cavities, the third partition plate extends along the axial direction of the outer heat conducting sleeve, and the third partition plate is spirally arranged around the axis of the outer heat conducting sleeve, inert gas is filled in each third cavity, and the connecting line between the two ends of each third partition plate is parallel to the axis of the outer heat conducting sleeve.

[0013] Preferably, a plurality of inner heat conducting sleeves and outer heat conducting sleeves are arranged, and the plurality of inner heat conducting sleeves and outer heat conducting sleeves are arranged along the axial direction of the cable core, and the second cavities in the inner heat conducting sleeves and the third cavities in the outer heat conducting sleeves are all independent sealed cavities.

[0014] Preferably, the corrosion-resistant marine control cable further comprises a plurality of end covers, the number of the end covers is consistent with the number of the cavities on the inner heat conducting sleeve, the shape of each end cover is consistent with the cross-sectional shape of the cavity perpendicular to the axis of the cable core, and the radius of the end cover is consistent with the radius of the outer heat conducting sleeve.

[0015] Preferably, the inner protective layer further comprises a corrosion-resistant layer and a shielding armor layer, the corrosion-resistant layer is sleeved on the outer heat conducting sleeve and is used for reducing the corrosion of the outer heat conducting sleeve, and the shielding armor layer is sleeved on the corrosion-resistant layer and is attached to the outer protective sleeve, and the shielding armor layer is processed by weaving corrosion-resistant tinned copper wires.

[0016] Preferably, an adhesive is arranged between the outer heat conducting sleeve, the corrosion-resistant layer, the shielding armor layer and the outer protective sleeve which are sequentially sleeved on the inner heat conducting sleeve.

[0017] The beneficial effects of the present application are as follows: by arranging the first cavity around the first mounting hole, the heat of the peripheral surface of the cable core is more evenly emitted into the first cavity, the heat of the first cavity is further emitted through the peripheral surface of the inner heat conducting sleeve, the heat dissipation uniformity of the peripheral surface of the first mounting hole is improved, local overheating of the cable core in the first mounting hole due to a long distance from the peripheral surface of the inner heat conducting sleeve is avoided, and thus the overall heat dissipation effect is affected; the second cavity is arranged, the gas pressure of the large second cavity is increased, the molecular distance between the gases is reduced, the heat dissipation speed in each second cavity is basically consistent, and the heat dissipation uniformity of the cable core is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A structural schematic view of a marine corrosion-resistant control cable provided by the embodiment of the present application;

[0019] Figure 2 A top view of a marine corrosion-resistant control cable provided by the embodiment of the present application;

[0020] Figure 3 A Figure 2 A sectional view in the direction of A-A;

[0021] Figure 4A structural schematic diagram of an inner heat sleeve of a marine erosion-resistant control cable provided by an embodiment of the present application is shown in the figure.

[0022] Figure 5 A structural schematic diagram of an outer heat sleeve of a marine erosion-resistant control cable provided by an embodiment of the present application is shown in the figure.

[0023] Figure 6 An internal structural schematic diagram of an outer heat sleeve of a marine erosion-resistant control cable provided by an embodiment of the present application is shown in the figure.

[0024] Figure 7 A structural schematic diagram of an end cover of a marine erosion-resistant control cable provided by an embodiment of the present application is shown in the figure.

[0025] In the figure, 100 is a cable core; 101 is an inner heat sleeve; 102 is a first mounting hole; 103 is a first partition plate; 104 is a second partition plate; 105 is a second cavity; 106 is a second mounting hole; 107 is a through slot; 200 is an outer heat sleeve; 201 is a third cavity; 202 is a third partition plate; 300 is an end cover; 400 is an anticorrosion layer; 500 is a shielding armor layer; 600 is an outer sheath; and 700 is a reinforcing core. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0027] In this document, the serial numbers of components, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. In the present application, "connection" and "coupling" include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In the present application, unless otherwise explicitly specified and limited, a first feature is "on" or "under" a second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature can be "above", "over" and "on top of" the second feature, which can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature can be "under", "below" and "underneath" the second feature, which can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0029] As shown in Figures 1 to 7 The embodiment of the present application provides a kind of marine erosion-resistant control cable, including cable core 100, inner sheath and outer sheath 600 in turn from inside to outside, inner sheath includes inner heat conducting sleeve 101, inner heat conducting sleeve 101 is cylindrical, the axis of cable core 100 is parallel with the axis of inner heat conducting sleeve 101, multiple first installation holes 102 for installing cable core 100 are set on inner heat conducting sleeve 101, multiple first installation holes 102 are evenly distributed around the axis of inner heat conducting sleeve 101, the number of cavity is same with the number of first installation hole 102, each cavity is located between the two radial lines of inner heat conducting sleeve 101 respectively passing through the center of adjacent first installation hole 102, each cavity is independent space, first installation hole 102 forms arc-shaped protrusion in cavity, first partition 103 is provided in cavity, first partition 103 separates cavity into two first cavities symmetrical in the circumferential direction of inner heat conducting sleeve 101, multiple second partitions 104 are provided in each first cavity, one side of each second partition 104 is connected with the inner wall of inner heat conducting sleeve 101, the other side of each second partition 104 is connected with the protrusion in the corresponding cavity, multiple second partitions 104 separate corresponding first cavity into multiple second cavities 105 distributed around the circumferential direction of protrusion, the size of second cavity 105 is negatively correlated with the distance from the part of protrusion located in the second cavity 105 to the axis of inner heat conducting sleeve 101, inert gas is filled in second cavity 105, and the pressure in second cavity 105 is positively correlated with the size of second cavity 105;Outer sheath 600 is used to protect inner sheath.

[0030] By setting first cavity around first installation hole 102, heat of cable core 100 periphery is more evenly radiated into first cavity, and heat of first cavity is radiated away through the periphery of inner heat conducting sleeve 101, to improve the heat dissipation uniformity of the periphery of first installation hole 102, avoid local overheating of cable core 100 in first installation hole 102 due to far distance from the periphery of inner heat conducting sleeve 101, so as to affect the overall heat dissipation effect;Second cavity 105 is set, and the gas pressure of larger second cavity 105 is increased, to reduce the intermolecular distance of gas, so that the heat dissipation speed in each second cavity 105 is basically consistent, to further improve the heat dissipation uniformity of cable core 100.

[0031] In the embodiment, the side of the plurality of second partitions 104 connected with the protrusions is sequentially distributed along the circumferential direction of the protrusions, and the plurality of second partitions 104 connected with the protrusions equally divide the protrusions; the side of the plurality of second partitions 104 connected with the inner wall of the inner heat conduction sleeve 101 is sequentially distributed along the circumferential direction of the inner heat conduction sleeve 101, and the plurality of second partitions 104 connected with the inner wall of the inner heat conduction sleeve 101 equally divide the inner wall of the inner heat conduction sleeve 101 in the corresponding first cavities, which can improve the uniformity of the inner heat conduction sleeve 101 after being heated; the number of the second partitions in each first cavity determines the size of the second cavity 105, and also determines the number of segments of the first mounting hole 102 and the inner heat conduction sleeve 101, and the more the number of segments of the first mounting hole 102 and the inner heat conduction sleeve 101 after being divided, the better the heat dissipation uniformity of the corresponding cable core 100.

[0032] The larger the second cavity 105, the closer the position of the first mounting hole 102 corresponding to the second cavity 105 to the center of the inner heat conduction sleeve 101, and the greater the gas pressure in the second cavity 105, the greater the pressure that the position can withstand along the radial direction of the inner heat conduction sleeve 101, and the smaller the difference between the pressure that the position can withstand and the pressure that the position where the cable core 100 passes through along the radial direction of the inner heat conduction sleeve 101 can withstand, so that the pressure bearing capacity of each position of the inner heat conduction sleeve 101 is basically consistent.

[0033] In the embodiment, the center of the inner heat conduction sleeve 101 is provided with a second mounting hole 106, the second mounting hole 106 is not communicated with the first mounting hole 102 and the cavity, and the second mounting hole 106 is used for mounting the reinforcing core 700. The reinforcing core 700 is made of aramid rope, which can ensure its softness and improve the overall tensile strength of the cable.

[0034] In the embodiment, the circumferential surface of the inner heat conducting sleeve 101 is provided with the same number of through grooves 107 as the first mounting holes 102. Each through groove 107 is provided corresponding to one first mounting hole 102, and the through groove 107 penetrates the circumferential surface of the inner heat conducting sleeve 101 along the radial direction of the inner heat conducting sleeve 101 and communicates with the corresponding first mounting hole 102. One of the through grooves 107 penetrates the first mounting hole 102 and communicates with the second mounting hole 106. The inner heat conducting sleeve 101 is made of rubber. Before the cable core 100 is installed, the reinforcing core 700 is installed into the second mounting hole 106 through the through groove 107 communicating with the second mounting hole 106, and then each cable core 100 is installed into the corresponding first mounting hole 102 through each through groove 107, which is convenient and fast. After all the cable cores 100 and the reinforcing core 700 are installed, the through groove 107 can be closed under the elastic force of the inner heat conducting sleeve 101 itself. The number of the inner heat conducting sleeve 101 is multiple. The two adjacent inner heat conducting sleeves 101 can be connected by an adhesive. The inside of each inner heat conducting sleeve 101 is filled with inert gas. When the cable is cut according to the actual installation requirement, the gas in the inner heat conducting sleeve 101 and the outer heat conducting sleeve 200 which are not cut is not affected.

[0035] In the embodiment, the inner heat conducting sleeve 101 includes multiple sector-shaped columns. The number of the sector-shaped columns is consistent with the number of the cable cores 100. The multiple sector-shaped columns can form a complete cylinder. The two adjacent sector-shaped columns in the cylinder are provided with semicircular grooves on the side close to each other. The two semicircular grooves form a first mounting hole 102. Each cavity is provided on a sector-shaped column. The center of each sector-shaped column is provided with an arc groove. The arc groove and the corresponding sector-shaped column are coaxial. The arc grooves on the multiple sector-shaped columns after being combined into a cylinder form a second mounting hole 106. The inner heat conducting sleeve 101 adopts a split design, which is convenient for processing and coating on the cable core 100.

[0036] In the embodiment, the inner protective layer further comprises an outer heat conducting sleeve 200, the outer heat conducting sleeve 200 is sleeved on the peripheral surface of the inner heat conducting sleeve 101, the inner heat conducting sleeve 101 is internally provided with a plurality of third cavities 201, a third partition plate 202 is arranged between two adjacent third cavities 201, the third partition plate 202 extends along the axial direction of the outer heat conducting sleeve 200, and the third partition plate 202 is spirally arranged around the axis of the outer heat conducting sleeve 200, each third cavity 201 is filled with inert gas, and the line between the two ends of each third partition plate 202 is parallel to the axis of the outer heat conducting sleeve 200, the third cavities 201 spirally arranged on the peripheral surface of the inner heat conducting sleeve 101 can be located above each cable core 100, when the heat generation of a certain cable core 100 is large, the heat of the cable core 100 can be covered on the surface of the entire cable through the third cavities 201, so that the overall temperature of the cable is as consistent as possible, and local overheating of the cable is avoided; meanwhile, the plurality of third cavities 201 can reduce the uncontrollability of heat transfer in the third cavities 201. A spiral mounting groove is arranged on the peripheral surface of the outer heat conducting sleeve 200, the spiral direction of the mounting groove is consistent with the spiral direction and pitch of the third partition plate 202, and when the outer heat conducting sleeve 200 is installed, the outer heat conducting sleeve 200 is pried open to make the mounting groove larger, and then the inner heat conducting sleeve 101 can be passed. The first partition plate 103 and the second partition plate 104 arranged in the inner heat conducting sleeve 101 and the third partition plate 202 arranged in the outer heat conducting sleeve 200 can improve the compression resistance and torsion resistance of the inner heat conducting sleeve 101 and the outer heat conducting sleeve 200.

[0037] The outer heat conducting sleeve 200 is based on halogen-free low-smoke flame-retardant polyolefin, and is added with flame retardants, antioxidants, crosslinking agents, ultraviolet light absorbers or light shielding agents and other auxiliaries, and then high-energy electron accelerator irradiation technology is adopted to make the branch structure into a network crosslinked structure, so as to meet the requirements of oil resistance, ultraviolet resistance, corrosion resistance, wear resistance, ozone resistance, high temperature resistance, sea water resistance and the like.

[0038] In the embodiment, a plurality of inner heat conducting sleeves 101 and outer heat conducting sleeves 200 are arranged, the plurality of inner heat conducting sleeves 101 and outer heat conducting sleeves 200 are arranged along the axial direction of the cable core 100, the second cavities 105 in the inner heat conducting sleeves 101 and the third cavities 201 in the outer heat conducting sleeves 200 are independent sealed cavities, after the cable is adaptively cut, there are still a plurality of inner heat conducting sleeves 101 and outer heat conducting sleeves 200 in the cable that can be normally used, and the cable as a whole still has good heat dissipation effect.

[0039] In the embodiment, the erosion-resistant marine control cable further comprises a plurality of end caps 300, the number of the end caps 300 is consistent with the number of the cavities on the inner heat-conducting sleeve 101, the shape of each end cap 300 is consistent with the cross-sectional shape of the cavity perpendicular to the axis of the cable core 100, and the radius of the end cap 300 is consistent with the radius of the outer heat-conducting sleeve 200. When the cable is adaptively cut and one of the inner heat-conducting sleeve 101 or the outer heat-conducting sleeve 200 is cut therefrom, the gas in the second cavity 105 of the inner heat-conducting sleeve 101 or the gas in the third cavity 201 of the outer heat-conducting sleeve 200 leaks. At this time, the second cavity 105 or the third cavity 201 can be sealed by installing the end cap 300 on the end surface of the cut cable, and the inner heat-conducting sleeve 101 or the outer heat-conducting sleeve 200 can be refilled with gas, so that the cable core 100 can better dissipate heat.

[0040] In the embodiment, the inner protective layer further comprises a corrosion-resistant layer 400 and a shielding armor layer 500. The corrosion-resistant layer 400 is sleeved on the outer heat-conducting sleeve 200 to reduce the corrosion of the outer heat-conducting sleeve 200. The shielding armor layer 500 is sleeved on the corrosion-resistant layer 400 and is attached to the outer protective sleeve 600. The shielding armor layer 500 is made of corrosion-resistant tin-plated copper wire and is spirally wound on the corrosion-resistant layer 400. The adjustment of the weaving pitch of the tin-plated copper wire meets the shielding requirement. The shielding armor layer 500 has an integrated structure, effectively shields electric field interference, and meets the normal control signal transmission requirement. The weaving structure is stable and can be used as an armor layer, and the laying space is saved.

[0041] In the embodiment, the outer heat-conducting sleeve 200, the corrosion-resistant layer 400, the shielding armor layer 500, and the outer protective sleeve 600 that are sequentially sleeved on the inner heat-conducting sleeve 101 are all provided with an adhesive. The adhesive can prevent the relative movement between the two components in contact with each other, thereby improving the overall tensile strength of the cable.

[0042] The assembly process of the marine erosion-resistant control cable provided in the above embodiment is as follows:

[0043] The inner heat conducting sleeve 101, the outer heat conducting sleeve 200 and the shielding armor layer 500 are all prefabricated parts; when assembling the cable, first, the through slot 107 on the inner heat conducting sleeve 101, which is in communication with the second mounting hole 106, is pried open, so that the reinforcing core 700 can pass through the through slot 107 and enter the second mounting hole 106, then a cable is installed into the corresponding first mounting hole 102 through the pried open through slot 107, the remaining through slots 107 are pried open in the same way, and the remaining cable cores 100 are installed into the corresponding first mounting holes 102; or the inner heat conducting sleeve 101 composed of a plurality of fan-shaped columns is used, the relative positions of the reinforcing core 700 and the plurality of cable cores 100 are fixed first, then the plurality of fan-shaped columns are sequentially moved towards the reinforcing core 700 along the radial direction of the reinforcing core 700 until the semicircular slots on the fan-shaped columns are in contact with the corresponding cable cores 100 and the arc slots are in contact with the reinforcing core 700.

[0044] When the outer heat conducting sleeve 200 is installed, the outer heat conducting sleeve 200 is pried open through the installation slot and then is sleeved on the inner heat conducting sleeve 101; then the corrosion protection layer 400 and the shielding armor layer 500 are sequentially sleeved, and then the outer sheath 600 is wrapped on the shielding armor layer 500 through the extrusion mechanism.

[0045] Finally, the end cap 300 is installed on the cross section of the cable.

[0046] The technical features of the above embodiments can be combined in any manner, and to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0047] The above described embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the present application. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A marine erosion resistant control cable, characterized in that, The cable includes a cable core, an inner protective layer and an outer protective layer which are sequentially sleeved from inside to outside, the inner protective layer includes an inner heat conducting sleeve, the inner heat conducting sleeve is columnar, the axis of the cable core is parallel to the axis of the inner heat conducting sleeve, a plurality of first installation holes for installing the cable core and cavities are arranged on the inner heat conducting sleeve, the plurality of first installation holes are uniformly distributed around the axis of the inner heat conducting sleeve, the number of the cavities is the same as that of the first installation holes, each cavity is located between two radial lines of the inner heat conducting sleeve which respectively pass through the centers of adjacent first installation holes, each cavity is an independent space, the first installation holes form arc-shaped protrusions in the cavities, a first partition plate is arranged in each cavity, the first partition plate divides the cavity into two first cavities which are symmetrical in the circumferential direction of the inner heat conducting sleeve, a plurality of second partition plates are arranged in each first cavity, one side of each second partition plate is connected with the inner wall of the inner heat conducting sleeve, the other side of each second partition plate is connected with the protrusion in the corresponding cavity, the plurality of second partition plates divide the corresponding first cavity into a plurality of second cavities which are distributed around the circumferential direction of the protrusion, the size of the second cavity is negatively correlated with the distance from the part of the protrusion located in the second cavity to the axis of the inner heat conducting sleeve, the second cavity is filled with inert gas, and the pressure in the second cavity is positively correlated with the size of the second cavity; the outer protective layer is used for protecting the inner protective layer. The sides of the plurality of second partition plates connected with the protrusion are sequentially distributed along the circumferential direction of the protrusion, and the plurality of second partition plates connected with the protrusion equally divide the protrusion; the sides of the plurality of second partition plates connected with the inner wall of the inner heat conducting sleeve are sequentially distributed around the circumferential direction of the inner heat conducting sleeve, and the plurality of second partition plates connected with the inner wall of the inner heat conducting sleeve equally divide the inner wall of the inner heat conducting sleeve in the corresponding first cavity. The inner protective layer further includes an outer heat conducting sleeve, the outer heat conducting sleeve is sleeved on the circumferential surface of the inner heat conducting sleeve, a plurality of third cavities are arranged in the inner heat conducting sleeve, a third partition plate is arranged between two adjacent third cavities, the third partition plate extends along the axial direction of the outer heat conducting sleeve, and the third partition plate is spirally arranged around the axis of the outer heat conducting sleeve, each third cavity is filled with inert gas, and the line connecting the two ends of each third partition plate is parallel to the axis of the outer heat conducting sleeve.

2. A marine erosion resistant control cable according to claim 1, characterised in that, A second installation hole is arranged in the center of the inner heat conducting sleeve, the second installation hole is not communicated with the first installation hole and the cavity, and the second installation hole is used for installing a reinforcing core.

3. A marine erosion resistant control cable according to claim 2, characterised in that, The same number of through grooves as the first installation holes are arranged on the circumferential surface of the inner heat conducting sleeve, each through groove is correspondingly arranged with a first installation hole, and the through groove penetrates the circumferential surface of the inner heat conducting sleeve along the radial direction of the inner heat conducting sleeve and is communicated with the corresponding first installation hole, and one of the through grooves penetrates the first installation hole and is communicated with the second installation hole.

4. An erosion resistant control cable for marine use according to claim 2, characterized in that, The inner heat conducting sleeve includes a plurality of sector columns, the number of the sector columns is consistent with the number of the cable core, the plurality of sector columns can form a complete cylinder, a semicircular groove is arranged on the side of each two adjacent sector columns in the cylinder, the two semicircular grooves form a first installation hole, each cavity is arranged on a sector column, an arc groove is arranged in the center of each sector column, the arc groove and the corresponding sector column are coaxial, and the arc grooves on the plurality of sector columns after forming the cylinder form a second installation hole.

5. An erosion resistant control cable for marine use according to claim 1, characterized in that, The inner heat conducting sleeve and the outer heat conducting sleeve are provided in plurality, the plurality of inner heat conducting sleeves and outer heat conducting sleeves are arranged along the axial direction of the cable core, and the second cavity in the inner heat conducting sleeve and the third cavity in the outer heat conducting sleeve are independent sealed cavities.

6. An erosion resistant control cable for marine use according to claim 1, characterized in that, A plurality of end caps are further included, the number of the end caps is consistent with the number of the cavities on the inner heat conducting sleeve, the shape of each end cap is consistent with the cross-sectional shape of the cavity perpendicular to the cable core axis, and the radius of the end cap is consistent with the radius of the outer heat conducting sleeve.

7. An erosion resistant control cable for marine use according to claim 1, characterized in that, The inner protective layer further includes a corrosion prevention layer and a shielding armor layer, the corrosion prevention layer is sleeved on the outer heat conducting sleeve to reduce the corrosion of the outer heat conducting sleeve, and the shielding armor layer is sleeved on the corrosion prevention layer and is attached to the outer sheath, and the shielding armor layer is processed by weaving of corrosion prevention type tinned copper wire.

8. An erosion resistant control cable for marine use according to claim 1, characterized in that, An adhesive is arranged between the outer heat conducting sleeve, the corrosion prevention layer, the shielding armor layer and the outer sheath which are sequentially sleeved on the inner heat conducting sleeve.

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