Cable for high-voltage direct-current remote supply

Abstract

The utility model discloses a cable for high-voltage direct-current remote supply. The cable comprises an insulating jacket, a cross-shaped frame, an anode cable and a cathode cable, the cross-shaped frame comprises a transverse plate and a vertical plate; the positive cable comprises a positive upper cable and a positive lower cable, and the negative cable comprises a negative upper cable and a negative lower cable; the transverse plates comprise a left transverse plate and a right transverse plate, and the vertical plates comprise an upper vertical plate and a lower vertical plate; the upper vertical plate is provided with an anode upper clamping groove and a cathode upper clamping groove, and the lower vertical plate is provided with an anode lower clamping groove and a cathode lower clamping groove; the left transverse plate is provided with a positive electrode left upper clamping groove and a positive electrode left lower clamping groove, and the right transverse plate is provided with a negative electrode right upper clamping groove and a negative electrode right lower clamping groove; the outer layer of the positive electrode upper cable is provided with a positive electrode upper clamping block; a positive electrode lower clamping block is arranged on the outer layer of the positive electrode lower cable; a negative electrode upper clamping block is arranged on the outer layer of the negative electrode upper cable; and a cathode lower clamping block is arranged on the outer layer of the cathode lower cable. According to the utility model, the positive electrode cable and the negative electrode cable are prevented from loosening, and the connection stability and reliability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to high voltage direct current remote supply technical field more specifically, it relates to the cable for high voltage direct current remote supply. BACKGROUND

[0002] High voltage direct current remote supply system is a kind of remote power supply technology using direct current power supply, it has high efficiency, stability, reliability, safety and other advantages, and is widely used in communication, power, transportation and other fields.The high voltage direct current remote supply system mainly includes local terminal equipment and remote equipment, and the two are connected by cable.The local terminal equipment is usually powered from stable mains power supply, and after voltage boosting, high voltage direct current is delivered to remote equipment through transmission cable.The remote equipment is responsible for converting the received high voltage direct current into voltage and current suitable for use by the electrical equipment.

[0003] High voltage direct current remote supply system supports multiple voltage levels, including 380V and 750V, 380V voltage level is suitable for some small power or low voltage requirement equipment, and 750V voltage level is suitable for equipment requiring higher voltage and larger power.The system can flexibly select appropriate voltage level for power supply according to different application requirements and equipment characteristics.

[0004] Because the cable from the local terminal equipment reaches the pole, the positive and negative cables are separated on the pole, so that a certain interval is maintained between the positive and negative cables on the pole, and the seemingly parallel positive and negative cables will swing back and forth due to the effect of wind, and the positive and negative cables will generate magnetic field, and the higher the voltage and the larger the current, the stronger the magnetic field generated;Another wire is cutting the magnetic field relative to the wire generating the magnetic field, the larger the wind, the larger the swing amplitude of the cable, the higher the induced potential.

[0005] Chinese patent document 1 (application number: 202220934864.0, application date: April 20, 2022) provides a communication cable harness for electrically connecting two communication devices to realize information interaction of each communication device, referring to Figure 1 As shown in Figure 1Fig. 1 is a schematic diagram of a cross-sectional structure of a communication cable harness provided by Chinese Patent Document 1; the communication cable harness includes: an insulating sheath 1' having a containing space; a first RS232 serial data communication cable 2' plugged into the containing space of the insulating sheath 1'; a first RS485 serial data communication cable 3' plugged into the containing space of the insulating sheath 1'; a first positive power supply cable 4' plugged into the containing space of the insulating sheath 1'; a first negative power supply cable 5' plugged into the containing space of the insulating sheath 1'; and an insulating material 6' filling the remaining containing space inside the insulating sheath 1', and the insulating material 6' is filled between any two of the first RS232 serial data communication cable 2', the first RS485 serial data communication cable 3', the first positive power supply cable 4', and the first negative power supply cable 5'. Although the first positive power supply cable 4' and the first negative power supply cable 5' are integrated in one communication cable harness in the above scheme, when any one of the first positive power supply cable 4' and the first negative power supply cable 5' is damaged, a complete communication cable harness needs to be replaced, which causes waste of resources. Assuming that the first positive power supply cable 4' is not replaced after being damaged, a positive cable needs to be drawn out from a local station, and the above defects still exist. Therefore, it is a technical problem urgently to be solved in the field.

[0006] Chinese Patent Document 2 (Application No. 202110796458.2, Application Date: July 14, 2021) discloses a charging cable, which belongs to the technical field of new energy charging cables and includes an outer sheath, a liquid cooling pipe, a plurality of positive cables, and a plurality of negative cables. The liquid cooling pipe is used for flowing cooling liquid. At least a part of the plurality of positive cables is in close contact with the liquid cooling pipe. Each positive cable includes a positive conductor and an insulating layer wrapping the positive conductor. At least a part of the plurality of negative cables is also in close contact with the liquid cooling pipe. Each negative cable includes a negative conductor and an insulating layer wrapping the negative conductor. The outer sheath is sleeved outside the liquid cooling pipe, the positive cables, and the negative cables. The plurality of positive cables and the plurality of negative cables in the scheme are used to contact the liquid cooling pipe, effectively increase the contact area between the power cable and the liquid cooling pipe, and increase the heat dissipation area and the heat conduction area. The present application belongs to the field of high-voltage direct-current remote supply. Since the technical fields to which the two applications belong are different, there is a big gap in the application scenarios and the technical problems solved. Therefore, the technical personnel in the field cannot easily think of applying the scheme of Chinese Patent Document 2 to Chinese Patent Document 1. Chinese Patent Document 1 belongs to armored design, while Chinese Patent Document 2 belongs to non-armored design. The plurality of positive cables and the plurality of negative cables are prone to move, which is also a technical problem urgently to be solved in the field. Utility model content

[0007] The utility model provides a cable for high voltage direct current remote supply, including insulating outer cover, cross type frame, positive cable and negative cable, the insulating outer cover is hollow circular structure,

[0008] The cross type frame is located in the insulating outer cover, the cross type frame includes the horizontal plate and the vertical plate who is connected with the horizontal plate, the horizontal plate and the vertical plate constitute cross type structure between, the length extension direction of the horizontal plate is same with the length extension direction of the vertical plate,

[0009] The horizontal plate and the vertical plate divide the hollow circular structure into four containing spaces,

[0010] The positive cable includes positive upper cable and positive lower cable, the negative cable includes negative upper cable and negative lower cable, the positive upper cable, the positive lower cable, negative upper cable and negative lower cable are inserted respectively in different containing spaces,

[0011] The horizontal plate includes oppositely arranged left horizontal plate and right horizontal plate, the vertical plate includes oppositely arranged upper vertical plate and lower vertical plate who is connected with the upper vertical plate, the left horizontal plate and the upper vertical plate and the right horizontal plate and the upper vertical plate constitute L shape structure between respectively, the left horizontal plate and the lower vertical plate and the right horizontal plate and the lower vertical plate constitute inverted L shape structure between respectively,

[0012] Along the direction of the left horizontal plate points to the right horizontal plate, the opposite sides of the upper vertical plate are provided with positive upper clamping groove and negative upper clamping groove respectively, the positive upper clamping groove and the negative upper clamping groove recess to the side close to the upper vertical plate, the opposite sides of the lower vertical plate are provided with positive lower clamping groove and negative lower clamping groove respectively, the positive lower clamping groove and the negative lower clamping groove recess to the side of the lower vertical plate, along the direction of the upper vertical plate points to the lower vertical plate, the opposite sides of the left horizontal plate are provided with positive left upper clamping groove and positive left lower clamping groove respectively, the positive left upper clamping groove and the positive left lower clamping groove recess to the side of the left horizontal plate, the opposite sides of the right horizontal plate are provided with negative right upper clamping groove and negative right lower clamping groove respectively, the negative right upper clamping groove and the negative right lower clamping groove recess to the side of the right horizontal plate respectively,

[0013] The outer layer of the positive upper cable is provided with the positive upper clamping block matched with the positive upper clamping groove and the positive left upper clamping groove respectively, two the positive upper clamping blocks are clamped to the positive upper clamping groove and the positive left upper clamping groove respectively, the outer layer of the positive lower cable is provided with the positive lower clamping block matched with the positive lower clamping groove and the positive left lower clamping groove respectively, two the positive lower clamping blocks are clamped to the positive lower clamping groove and the positive left lower clamping groove respectively,

[0014] The outer layer of the positive upper cable is respectively provided with a positive upper clamping block matched with the positive upper clamping groove and the positive right upper clamping groove, and the two positive upper clamping blocks are respectively clamped to the positive upper clamping groove and the positive right upper clamping groove.

[0015] Compared with the prior art, the cable for high-voltage direct-current remote supply provided by the utility model at least realizes the following beneficial effects:

[0016] Firstly, through the cable for high-voltage direct-current remote supply provided by the utility model, the positive cable and the negative cable are fixed in the insulating cover at the same time, even if there is wind in the natural environment, the parallel state between the positive cable and the negative cable can be maintained to ensure the stability and safety of power transmission.

[0017] Secondly, through the cable for high-voltage direct-current remote supply provided by the utility model, not only the deformation or displacement of the positive cable and the negative cable during long-term use or under external force can be prevented, thereby ensuring the stability and reliability of the positive cable and the negative cable, but also the mechanical strength of the cable as a whole can be enhanced, so that it can resist the influence of external mechanical stress, such as stretching and extrusion, thereby prolonging the service life of the cable, and the cross-shaped frame as part of the internal structure of the cable can provide certain protection for the positive cable and the negative cable to prevent direct damage or interference from the external environment.

[0018] Thirdly, through the cable for high-voltage direct-current remote supply provided by the utility model, not only the close contact of the positive upper cable, the negative upper cable, the positive lower cable and the negative lower cable with the cross-shaped frame can be ensured to prevent the positive upper cable, the negative upper cable, the positive lower cable and the negative lower cable from loosening, thereby improving the stability and reliability of the connection, but also one or two damaged cables can be easily extracted without replacing the entire cable, thereby reducing the cost.

[0019] Of course, any product implementing the utility model does not necessarily need to achieve all the technical effects described above.

[0020] Other features and advantages of the utility model will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings incorporated in and forming a part of the specification illustrate embodiments of the utility model and, together with the description, serve to explain the principles of the utility model.

[0022] Figure 1is a cross-sectional structure schematic view of a communication cable harness provided by Chinese patent document 1;

[0023] Figure 2 is a structure schematic view of a cable for high-voltage direct-current remote supply provided by the utility model;

[0024] Figure 3 is a structure schematic view of a cross type frame provided by the utility model;

[0025] Figure 4 is Figure 2 is a local enlarged view of A in the figure;

[0026] Figure 5 is Figure 2 is a local enlarged view of B in the figure;

[0027] Figure 6 is a structure schematic view of a positive electrode upper cable provided by the utility model;

[0028] Figure 7 is a structure schematic view of a negative electrode upper cable provided by the utility model;

[0029] Figure 8 is a structure schematic view of a positive electrode upper clamping block and a positive electrode upper clamping slot in the positive electrode upper cable provided by the utility model. DETAILED DESCRIPTION

[0030] Various exemplary embodiments of the present utility model will now be described in detail below with reference to the drawings. Note that the relative arrangement, numerical expressions, and numerical values of the components and steps set forth in these embodiments are not limiting to the scope of the present utility model unless otherwise specifically stated.

[0031] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the present utility model and its application or uses.

[0032] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as part of the specification, where appropriate.

[0033] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary, and not as a limitation. Thus, other examples of exemplary embodiments can have different values.

[0034] Note that like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0035] Referring to Figures 2-7 the figure, Figure 2It is the structural schematic view of the cable for high-voltage direct current remote supply provided by the utility model; Figure 3 It is the structural schematic view of the cross type frame provided by the utility model;

[0036] Figure 4 It is Figure 2 The local enlarged view of A in the middle; Figure 5 It is Figure 2 The local enlarged view of B in the middle; Figure 6 It is the structural schematic view of the positive upper cable provided by the utility model; Figure 7 It is the structural schematic view of the negative upper cable provided by the utility model; the embodiment provides a cable for high-voltage direct current remote supply, which comprises an insulating outer cover 1, a cross type frame 2, a positive cable 3 and a negative cable 4;

[0037] The insulating outer cover 1 is a hollow circular structure;

[0038] The cross type frame 2 is located in the insulating outer cover 1, the cross type frame 2 comprises a horizontal plate 21 and a vertical plate 22 connected with the horizontal plate 21, a cross type structure is formed between the horizontal plate 21 and the vertical plate 22, and the length extension direction of the horizontal plate 21 is same with that of the vertical plate 22;

[0039] The horizontal plate 21 and the vertical plate 22 divide the hollow circular structure into four containing spaces (not marked in the drawing);

[0040] The positive cable 3 comprises a positive upper cable 31 and a positive lower cable 32, the negative cable 4 comprises a negative upper cable 41 and a negative lower cable 42, and the positive upper cable 31, the positive lower cable 32, the negative upper cable 41 and the negative lower cable 42 are respectively inserted into different containing spaces;

[0041] The horizontal plate 21 comprises oppositely arranged left and right horizontal plates 210 and 211, the vertical plate 22 comprises oppositely arranged upper and lower vertical plates 220 and 221, an L-shaped structure is respectively formed between the left horizontal plate 210 and the upper vertical plate 220 and between the right horizontal plate 211 and the upper vertical plate 220, and an inverted L-shaped structure is respectively formed between the left horizontal plate 210 and the lower vertical plate 221 and between the right horizontal plate 211 and the lower vertical plate 221;

[0042] Along the direction of the left horizontal plate 210 pointing to the right horizontal plate 211, the opposite sides of the upper vertical plate 220 are respectively provided with a positive electrode upper clamping groove 2201 and a negative electrode upper clamping groove 2202, the positive electrode upper clamping groove 2201 and the negative electrode upper clamping groove 2202 are recessed towards the side of the upper vertical plate 220, the opposite sides of the lower vertical plate 221 are respectively provided with a positive electrode lower clamping groove 2210 and a negative electrode lower clamping groove 2211, the positive electrode lower clamping groove 2210 and the negative electrode lower clamping groove 2211 are recessed towards the side of the lower vertical plate 221; along the direction of the upper vertical plate 220 pointing to the lower vertical plate 221, the opposite sides of the left horizontal plate 210 are respectively provided with a positive electrode left upper clamping groove 2101 and a positive electrode left lower clamping groove 2102, the positive electrode left upper clamping groove 2101 and the positive electrode left lower clamping groove 2102 are recessed towards the side of the left horizontal plate 210, the opposite sides of the right horizontal plate 211 are respectively provided with a negative electrode right upper clamping groove (not marked in the figure) and a negative electrode right lower clamping groove (not marked in the figure); the negative electrode right upper clamping groove and the negative electrode right lower clamping groove are respectively recessed towards the side of the right horizontal plate 211;

[0043] The outer layer of the positive electrode upper cable 31 is respectively provided with a positive electrode upper clamping block 3141 matched with the positive electrode upper clamping groove 2201 and the positive electrode left upper clamping groove 2101, and the two positive electrode upper clamping blocks 3141 are respectively clamped to the positive electrode upper clamping groove 2201 and the positive electrode left upper clamping groove 2101; the outer layer of the positive electrode lower cable 32 is respectively provided with a positive electrode lower clamping block 3142 matched with the positive electrode lower clamping groove 2210 and the positive electrode left lower clamping groove 2102, and the two positive electrode lower clamping blocks 3142 are respectively clamped to the positive electrode lower clamping groove 2210 and the positive electrode left lower clamping groove 2102.

[0044] The outer layer of the positive electrode upper cable 31 is respectively provided with a positive electrode upper clamping block 3141 matched with the positive electrode upper clamping groove 2201 and the positive electrode left upper clamping groove 2101, and the two positive electrode upper clamping blocks 3141 are respectively clamped to the positive electrode upper clamping groove 2201 and the positive electrode left upper clamping groove 2101; the outer layer of the positive electrode lower cable 32 is respectively provided with a positive electrode lower clamping block 3142 matched with the positive electrode lower clamping groove 2210 and the positive electrode left lower clamping groove 2102, and the two positive electrode lower clamping blocks 3142 are respectively clamped to the positive electrode lower clamping groove 2210 and the positive electrode left lower clamping groove 2102.

[0045] Specifically, continuing to refer to Figure 2 The embodiment provides a cable for high-voltage direct-current remote supply, which comprises an insulating outer cover 1, a cross-shaped frame 2, a positive electrode cable 3 and a negative electrode cable 4, wherein the positive electrode cable 3 is used for transmitting a positive electrode, and the negative electrode cable 4 is used for transmitting a negative electrode.

[0046] The insulating outer cover 1 is a hollow circular structure, which is wrapped in the outermost layer of the cross-shaped frame 2, the positive electrode cable 3 and the negative electrode cable 4, and plays a role of protecting the internal structure (such as the cross-shaped frame 2, the positive electrode cable 3 and the negative electrode cable 4) and insulation of the cable; the material of the insulating outer cover 1 is usually selected from materials with excellent insulation performance and weather resistance, such as polymer insulating materials, so as to ensure the stability and reliability of the cable in the long-term use process.

[0047] In combination Figure 1 And Figure 2 As shown in the drawings, the cross-shaped frame 2 is located in the insulating sheath 1, that is, the insulating sheath 1 wraps outside the cross-shaped frame 2, the cross-shaped frame 2 not only can fix the positive cable 3 and the negative cable 4, but also can enhance the mechanical strength of the cable as a whole, so that it can better resist the influence of external mechanical stress, such as stretching and extrusion, thereby prolonging the service life of the cable; the cross-shaped frame 2 includes a horizontal plate 21 and a vertical plate 22 connected with the horizontal plate 21, the shape of the horizontal plate 21 and the vertical plate 22 can be rectangular, a cross-shaped structure is formed between the horizontal plate 21 and the vertical plate 22, the length extension direction of the horizontal plate 21 is the same as the length extension direction of the vertical plate 22, and the length extension direction of the horizontal plate 21 can extend along the axial direction of the cable, that is, the horizontal plate 21 is consistent with the laying direction of the positive cable 3 and the negative cable 4. Such a design helps to ensure that the cable can evenly disperse the pressure when subjected to external force, thereby enhancing the mechanical strength of the cable; the vertical plate 22 mainly serves to support and fix the horizontal plate 21, and also helps to improve the compression resistance and tensile strength of the cable.

[0048] The horizontal plate 21 and the vertical plate 22 divide the hollow circular structure into four accommodation spaces, the shape of each accommodation space can be a sector, and the positive cable 3 and the negative cable 4 can be inserted into each sector-shaped accommodation space; the positive upper cable 31, the positive lower cable 32, the negative upper cable 41 and the negative lower cable 42 can be inserted into the four accommodation spaces respectively.

[0049] The positive upper cable 31 and the positive lower cable 32 have the same structure and the same polarity, and the positive upper cable 31 and the positive lower cable 32 can more effectively transmit current and improve the current-carrying capacity of the cable, which is particularly important for a DC remote supply system that needs to transmit large current, and can ensure stable operation and high efficiency of the system; using two positive conductors 310 can increase the redundancy and reliability of the cable, so that even if one of the positive conductors 310 fails, the other positive conductor 310 can still continue to transmit current, thereby ensuring continuous operation and safety of the high-voltage DC remote supply, and in addition, the electric field stress can be more effectively dispersed, the electric field strength of the cable during operation is reduced, and the insulation performance and service life of the cable are improved.

[0050] The positive upper cable 31 and the positive lower cable 32 each include at least two positive conductors 310, the number of the positive conductors 310 can be 2, 4, 5, 6 or 7, and the number of the positive conductors 310 can be increased or decreased according to actual conditions, which is not limited in the embodiment. The material of the positive conductor 310 can be copper, which has a low resistivity and can meet the demand for efficient transmission of electric energy.

[0051] In combination Figure 2 And Figure 6As shown, the outer surface of the at least two positive conductors 310 is successively covered with an inner positive silane cross-linked polyethylene insulation layer 311, a positive heat-conductive layer 312, a positive aluminum foil layer 313, and an outer positive silane cross-linked polyethylene insulation layer 314. The inner positive silane cross-linked polyethylene insulation layer 311 mainly serves as insulation to ensure that the positive upper cable 31 and the positive lower cable 32 will not short circuit or leak electricity when transmitting direct current due to the exposure of the positive conductors 310. The positive heat-conductive layer 312 mainly serves to help the positive conductors 310 dissipate heat and ensure that the positive upper cable 31 and the positive lower cable 32 will not be damaged due to overheating during long-term operation. It can effectively conduct the heat generated by the positive conductors 310 out, maintaining the stable operation of the positive upper cable 31 and the positive lower cable 32. The positive aluminum foil layer 313 serves as a shielding layer, which can block the influence of external electromagnetic interference on the internal signals of the cable, and also has a certain heat insulation effect, protecting the internal structure of the positive upper cable 31 and the positive lower cable 32 from damage by the external environment. The outer positive silane cross-linked polyethylene insulation layer 314 further enhances the insulation performance and mechanical strength of the positive upper cable 31 and the positive lower cable 32, improving the durability and safety of the cable. It meets the use requirements of high-voltage direct-current remote power supply cables in complex environments, ensuring that the electrical, thermal, and mechanical properties of the cable can all be in the best state.

[0052] The positive upper cable 31 and the positive lower cable 32 adopt different multi-layer designs, which not only improve the electrical, heat dissipation, and anti-interference performance of the high-voltage direct-current remote power supply cable, but also enhance its mechanical strength and stability, thereby ensuring the efficient and stable operation of the cable during long-distance and large-capacity power transmission.

[0053] Optionally, continuing to refer to Figure 2 As shown, the above-mentioned positive silane cross-linked polyethylene insulation layer can be filled with copper material between at least two adjacent positive conductors 310, which helps to more evenly distribute the current, reduces resistance, and improves the conductivity of the positive upper cable 31 and the positive lower cable 32.

[0054] In combination with Figure 2 and Figure 7As shown, the negative cable 4 includes a negative upper cable 41 and a negative lower cable 42, both of which include at least two negative conductors 410, the outer surfaces of which are sequentially covered with an inner negative silane cross-linked polyethylene insulation layer 411, a negative heat conduction layer 412, a negative aluminum foil layer 413, and an outer negative silane cross-linked polyethylene insulation layer 414; the inner negative silane cross-linked polyethylene insulation layer 411 mainly serves as an insulation function to ensure that the negative upper cable 41 and the negative lower cable 42 will not cause short circuit or electric leakage when transmitting direct current due to the exposure of the negative conductors 410. The negative heat conduction layer 412 mainly serves to help the negative conductors 410 dissipate heat, ensuring that the negative upper cable 41 and the negative lower cable 42 will not be damaged due to overheating during long-term operation. It can effectively conduct the heat generated by the negative conductors 410 out, maintaining the stable operation of the negative upper cable 41 and the negative lower cable 42. The negative aluminum foil layer 413 serves as a shielding layer, which can block the influence of external electromagnetic interference on the internal signals of the cable, and also has a certain heat insulation effect, protecting the internal structure of the negative upper cable 41 and the negative lower cable 42 from damage by the external environment. The outer negative silane cross-linked polyethylene insulation layer 414 further enhances the insulation performance and mechanical strength of the negative upper cable 41 and the negative lower cable 42, improving the durability and safety of the cable. It meets the use requirements of high-voltage direct-current remote power supply cables in complex environments, ensuring that the electrical, thermal and mechanical properties of the cable can all be in the best state.

[0055] The negative upper cable 41 and the negative lower cable 42 adopt different multi-layer designs, which not only improve the electrical performance, heat dissipation performance and anti-interference ability of the high-voltage direct-current remote power supply cable, but also enhance its mechanical strength and stability, thereby ensuring the efficient and stable operation of the cable during long-distance and large-capacity power transmission.

[0056] The above-mentioned inner positive silane cross-linked polyethylene insulation layer 311, outer positive silane cross-linked polyethylene insulation layer 314, inner negative silane cross-linked polyethylene insulation layer 411 and outer negative silane cross-linked polyethylene insulation layer 414 all adopt silane cross-linked polyethylene material, which is a existing material with excellent insulation performance and heat resistance, and the present embodiment does not improve the silane cross-linked polyethylene material; the material of the positive heat conduction layer 312 and the negative heat conduction layer 412 can adopt heat-conducting silicone particles or heat-conducting rubber material, which is a material with excellent heat conduction performance, used to conduct the heat generated by the positive conductors 310 and the negative conductors 410 out, maintaining the stable operation of the positive cable 3 and the negative cable 4; the above-mentioned heat-conducting silicone particles are existing materials, and the present embodiment does not improve the heat-conducting silicone particles, such as Chinese Patent Document 3 (Application No. 201621311224.5, Application Date: December 2, 2016); the positive aluminum foil layer 313 and the negative aluminum foil layer 413 can adopt aluminum foil, which has shielding effectiveness, and the aluminum foil is an existing material, and the present embodiment does not improve the aluminum foil.

[0057] Optionally, continuing to refer to Figure 2 As shown in the above, the copper material can be filled between the at least two adjacent negative conductors 410 in the negative silane cross-linked polyethylene insulation layer, which helps to more evenly distribute the current, reduce the resistance, and improve the conductivity of the positive upper cable 41 and the negative lower cable 42.

[0058] Continuing to refer to Figure 2 As shown in the above, the left horizontal plate 210 and the right horizontal plate 211 are respectively located on the left and right sides of the vertical plate 22, the left horizontal plate 210 and the right horizontal plate 211 are respectively cuboid structures, the vertical plate 22 includes the upper vertical plate 220 and the lower vertical plate 221 connected with the upper vertical plate 220, the left horizontal plate 210, the right horizontal plate 211, the upper vertical plate 220 and the lower vertical plate 221 are integrated structures, the above left horizontal plate 210, right horizontal plate 211, upper vertical plate 220 and lower vertical plate 221 are integrated structures, which not only can avoid assembly, but also the overall structure is more stable; the L-shaped structure formed between the left horizontal plate 210 and the upper vertical plate 220 and the L-shaped structure formed between the right horizontal plate 211 and the upper vertical plate 220 have different opening directions, the inverted L-shaped structure formed between the left horizontal plate 210 and the lower vertical plate 221 and the inverted L-shaped structure formed between the right horizontal plate 211 and the lower vertical plate 221 have different opening directions; the two L-shaped structures and the two inverted L-shaped structures can quickly guide the positive upper cable 31, the positive lower cable 32, the negative upper cable 41 and the negative lower cable 42 to be inserted into the insulation outer cover 1.

[0059] The above positive upper clamping groove 2201 and the negative upper clamping groove 2202 are respectively designed on the left and right sides of the upper vertical plate 220 along the direction of the left horizontal plate 210 pointing to the right horizontal plate 211; the positive lower clamping groove 2210 and the negative lower clamping groove 2211 are respectively designed on the left and right sides of the left horizontal plate 210 along the direction of the left horizontal plate 210 pointing to the right horizontal plate 211; the positive left upper clamping groove 2101 and the positive left lower clamping groove 2102 are respectively designed on the upper and lower sides of the upper vertical plate 220 along the direction of the upper vertical plate 220 pointing to the lower vertical plate 221, and the negative right upper clamping groove and the negative right lower clamping groove are respectively designed on the upper and lower sides of the upper vertical plate 220 along the direction of the upper vertical plate 220 pointing to the lower vertical plate 221.

[0060] In combination with Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the outer layer of the positive electrode upper cable 31 is fixedly connected with the positive electrode upper clamping block 3141 matched with the positive electrode upper clamping groove 2201 and the positive electrode left upper clamping groove 2101, that is, the number of the positive electrode upper clamping block 3141 is two, and the two positive electrode upper clamping blocks 3141 are clamped to the positive electrode upper clamping groove 2201 and the positive electrode left upper clamping groove 2101 respectively; by clamping between the two positive electrode upper clamping blocks 3141 and the positive electrode upper clamping groove 2201 and the positive electrode left upper clamping groove 2101, the positive electrode upper cable 31 is fixed between the left horizontal plate 210 and the upper vertical plate 220, so as to avoid loosening of the positive electrode upper cable 31.

[0061] The outer layer of the positive electrode lower cable 32 is fixedly connected with the positive electrode lower clamping block 3142 matched with the positive electrode lower clamping groove 2210 and the positive electrode left lower clamping groove 2102, that is, the number of the positive electrode lower clamping block 3142 is two, and the two positive electrode lower clamping blocks 3142 are clamped to the positive electrode lower clamping groove 2210 and the positive electrode left lower clamping groove 2102 respectively; by clamping between the two positive electrode lower clamping blocks 3142 and the positive electrode lower clamping groove 2210 and the positive electrode left lower clamping groove 2102, the positive electrode lower cable 32 is fixed between the left horizontal plate 210 and the lower vertical plate 221, so as to avoid loosening of the positive electrode lower cable 32.

[0062] The outer layer of the positive electrode lower cable 32 is fixedly connected with the positive electrode lower clamping block 3142 matched with the positive electrode lower clamping groove 2210 and the positive electrode left lower clamping groove 2102, that is, the number of the positive electrode lower clamping block 3142 is two, and the two positive electrode lower clamping blocks 3142 are clamped to the positive electrode lower clamping groove 2210 and the positive electrode left lower clamping groove 2102 respectively; by clamping between the two positive electrode lower clamping blocks 3142 and the positive electrode lower clamping groove 2210 and the positive electrode left lower clamping groove 2102, the positive electrode lower cable 32 is fixed between the left horizontal plate 210 and the lower vertical plate 221, so as to avoid loosening of the positive electrode lower cable 32.

[0063] The outer layer of the positive electrode lower cable 32 is fixedly connected with the positive electrode lower clamping block 3142 matched with the positive electrode lower clamping groove 2210 and the positive electrode left lower clamping groove 2102, that is, the number of the positive electrode lower clamping block 3142 is two, and the two positive electrode lower clamping blocks 3142 are clamped to the positive electrode lower clamping groove 2210 and the positive electrode left lower clamping groove 2102 respectively; by clamping between the two positive electrode lower clamping blocks 3142 and the positive electrode lower clamping groove 2210 and the positive electrode left lower clamping groove 2102, the positive electrode lower cable 32 is fixed between the left horizontal plate 210 and the lower vertical plate 221, so as to avoid loosening of the positive electrode lower cable 32.

[0064] By adopting the above scheme, the positive electrode upper cable 31, the negative electrode upper cable 41, the positive electrode lower cable 32 and the negative electrode lower cable 42 can be ensured to be in close contact with the cross-shaped frame 2, and loosening of the positive electrode upper cable 31, the negative electrode upper cable 41, the positive electrode lower cable 32 and the negative electrode lower cable 42 is prevented, so as to improve the stability and reliability of the connection.

[0065] Since the positive upper cable 31, the negative upper cable 41, the positive lower cable 32 and the negative lower cable 42 are independently designed, not armored cables, when one or two of the positive upper cable 31, the negative upper cable 41, the positive lower cable 32 and the negative lower cable 42 are removed, the corresponding positive or negative cable can be replaced according to the actual situation, without the need to replace the entire cable, thereby greatly saving costs; assuming that only one of the positive upper cable 31, the negative upper cable 41, the positive lower cable 32 and the negative lower cable 42 is damaged, the damaged cable can be removed, since the positive upper cable 31 and the positive lower cable 32 are used for transmitting positive, even if one is damaged, it does not affect the use of the cable; if one of the positive upper cable 31 and the positive lower cable 32 is damaged, and one of the negative upper cable 41 and the negative lower cable 42 is damaged, such as the positive upper cable 31 is damaged and the negative upper cable 41 is damaged, since the positive lower cable 32 and the negative lower cable 42 can still be used normally, the entire cable does not need to be replaced, the positive upper cable 31 and the negative upper cable 41 can be removed, or new positive upper cable 31 and negative upper cable 41 can be inserted into the corresponding positions of the original positive upper cable 31 and negative upper cable 41 according to the actual situation.

[0066] Compared with the prior art, the cable for high-voltage direct-current remote supply provided by the embodiment at least achieves the following beneficial effects:

[0067] First, the cable for high-voltage direct-current remote supply provided by the embodiment fixes the positive cable 3 and the negative cable 4 in the insulation sheath 1 at the same time, so that the positive cable 3 and the negative cable 4 can be kept in a parallel state even if there is wind in the natural environment, to ensure the stability and safety of power transmission.

[0068] Second, the cable for high-voltage direct-current remote supply provided by the embodiment not only prevents the positive cable 3 and the negative cable 4 from deforming or displacing during long-term use or under external force, thereby ensuring the stability and reliability of the positive cable 3 and the negative cable 4, but also enhances the mechanical strength of the entire cable, so that it can better resist external mechanical stress such as stretching and extrusion, thereby prolonging the service life of the cable, and the cross-shaped frame 2 as part of the internal structure of the cable can provide certain protection for the positive cable 3 and the negative cable 4, preventing them from being directly damaged or interfered by the external environment.

[0069] Third, the cable for high-voltage direct current remote supply provided by the embodiment can not only ensure the close contact of the positive upper cable 31, the negative upper cable 41, the positive lower cable 32 and the negative lower cable 42 with the cross-shaped frame 2, prevent the positive upper cable 31, the negative upper cable 41, the positive lower cable 32 and the negative lower cable 42 from loosening, thereby improving the stability and reliability of the connection, but also facilitate the extraction of one or two damaged cables, without the need to replace the entire cable, thereby reducing the cost.

[0070] Optionally, continuing to refer to Figure 2 As shown, the insulating sheath 1 can be made of cross-linked polyethylene material, which has heat resistance, aging resistance, mechanical strength and electrical insulation performance, can not only improve the heat resistance, but also maintain stability in high temperature and harsh environment, and can withstand high voltage without being punctured.

[0071] Optionally, continuing to refer to Figure 2 As shown, along the axial direction of the insulating sheath 1, the length of the cross-shaped frame 2 along the insulating sheath 1 can be 20-50 cm, and the number of the cross-shaped frame 2 can be two, and the two cross-shaped frames 2 are respectively arranged at the head and tail ends of the insulating sheath 1, so as to guide the positive upper cable 31, the negative upper cable 41, the positive lower cable 32 and the negative lower cable 42 to be inserted into the insulating sheath 1. Of course, according to the actual situation, the length of the cross-shaped frame 2 along the insulating sheath 1 can also be equal to the length of the insulating sheath 1, and the embodiment is not limited in particular.

[0072] Optionally, continuing to refer to Figure 3 As shown, the positive upper clamping groove 2201, the negative upper clamping groove 2202, the positive lower clamping groove 2210, the negative lower clamping groove 2211, the positive upper left clamping groove 2101, the positive lower left clamping groove 2102, the negative upper right clamping groove and the negative lower right clamping groove are designed at the head of the upper vertical plate 220, the lower vertical plate 221, the left horizontal plate 210 and the right horizontal plate 211, so as to facilitate the operation of personnel.

[0073] In an optional embodiment, in combination with Figure 2 , Figure 4 , Figure 5 and Figure 8 As shown, Figure 8 is a structure diagram of the positive upper clamping block and the positive upper clamping groove in the positive upper cable provided by the utility model; the positive upper clamping groove 2201 and the negative upper clamping groove 2202 both comprise an upper clamping groove body 22011, the upper clamping groove body 22011 is provided with an upper recessed area 22011a, the upper recessed area 22011a is recessed to one side of the upper vertical plate 220 in the direction of the upper vertical plate 220 pointing to the lower vertical plate 221, and the opposite sides of the upper clamping groove body 22011 are also provided with upper edge recessed areas 22011b in communication with the upper recessed area 22011a;

[0074] The positive electrode lower clamping groove 2210 and the negative electrode lower clamping groove 2211 each include a lower clamping groove body (not labeled in the figure), and a lower recessed area (not labeled in the figure) is formed in the lower clamping groove body, the lower recessed area is recessed to one side of the lower vertical plate 221, and along a direction in which the upper vertical plate 220 points to the lower vertical plate 221, opposite sides of the lower clamping groove body are also provided with lower edge recessed areas (not labeled in the figure) that are in communication with the lower recessed area;

[0075] The positive electrode left upper clamping groove 2101 and the positive electrode left lower clamping groove 2102 each include a left clamping groove body 21011, and a left recessed area 21011a is formed in the left clamping groove body 21011, the left recessed area 21011a is recessed to one side of the left horizontal plate 210, and along a direction in which the left horizontal plate 210 points to the right horizontal plate 211, opposite sides of the left clamping groove body 21011 are also provided with left edge recessed areas 21011b that are in communication with the left recessed area 21011a;

[0076] The positive electrode left upper clamping groove 2101 and the positive electrode left lower clamping groove 2102 each include a left clamping groove body 21011, and a left recessed area 21011a is formed in the left clamping groove body 21011, the left recessed area 21011a is recessed to one side of the left horizontal plate 210, and along a direction in which the left horizontal plate 210 points to the right horizontal plate 211, opposite sides of the left clamping groove body 21011 are also provided with left edge recessed areas 21011b that are in communication with the left recessed area 21011a;

[0077] The positive electrode upper cable 31 is provided with a positive electrode upper clamping block 3141, and the positive electrode upper clamping block 3141 is provided with a left edge protruding block area 31412 that is matched with the left edge recessed area 21011b of the positive electrode left upper clamping groove 2101, and the positive electrode lower cable 32 is provided with a positive electrode lower clamping block 3142, and the positive electrode lower clamping block 3142 is provided with a right edge protruding block area (not labeled in the figure) that is matched with the right edge recessed area of the positive electrode right lower clamping groove;

[0078] The positive electrode upper cable 31 is provided with a positive electrode upper clamping block 3141, and the positive electrode upper clamping block 3141 is provided with a left edge protruding block area 31412 that is matched with the left edge recessed area 21011b of the positive electrode left upper clamping groove 2101, and the positive electrode lower cable 32 is provided with a positive electrode lower clamping block 3142, and the positive electrode lower clamping block 3142 is provided with a right edge protruding block area (not labeled in the figure) that is matched with the right edge recessed area of the positive electrode right lower clamping groove;

[0079] The positive electrode upper cable 31 is provided with a positive electrode upper clamping block 3141, and the positive electrode upper clamping block 3141 is provided with a left edge protruding block area 31412 that is matched with the left edge recessed area 21011b of the positive electrode left upper clamping groove 2101, and the positive electrode lower cable 32 is provided with a positive electrode lower clamping block 3142, and the positive electrode lower clamping block 3142 is provided with a right edge protruding block area (not labeled in the figure) that is matched with the right edge recessed area of the positive electrode right lower clamping groove;

[0080] The positive electrode upper cable 31 is provided with a positive electrode upper clamping block 3141, and the positive electrode upper clamping block 3141 is provided with a left edge protruding block area 31412 that is matched with the left edge recessed area 21011b of the positive electrode left upper clamping groove 2101, and the positive electrode lower cable 32 is provided with a positive electrode lower clamping block 3142, and the positive electrode lower clamping block 3142 is provided with a right edge protruding block area (not labeled in the figure) that is matched with the right edge recessed area of the positive electrode right lower clamping groove.

[0081] Specifically, in combination with Figure 2 and Figure 4 shown in the above, the structure of the upper clamping groove body 22011, the lower clamping groove body, the left clamping groove body 21011 and the right clamping groove body can be rectangular structure, the upper recessed area 22011a in the above clamping groove body 22011 is an upper trapezoidal structure, the upper base of the upper trapezoidal structure is close to one side of the upper vertical plate 220, the lower base is away from one side of the upper vertical plate 220, and the length of the upper base in the upper trapezoidal structure is less than the length of the lower base in the direction of the upper vertical plate 220 pointing to the lower vertical plate 221; the upper and lower ends of the upper base in the upper trapezoidal structure are respectively provided with upper edge recessed areas 22011b, the structure of the two upper edge recessed areas 22011b is rectangular structure, the positive electrode upper clamping block 3141 in the positive electrode upper cable 31 is close to one side of the positive electrode upper clamping groove 2201, and the negative electrode upper clamping block 4141 in the negative electrode upper cable 41 is close to one side of the negative electrode upper clamping groove 2202, respectively provided with the upper edge protruding block area 31411 matched with the upper edge recessed area 22011b, and the two upper edge protruding block areas 31411 can be directly clamped to the two upper edge recessed areas 22011b;

[0082] The lower recessed area in the above lower clamping groove body is a lower trapezoidal structure, the upper base of the lower trapezoidal structure is close to one side of the lower vertical plate 221, the lower base is away from one side of the lower vertical plate 221, and the length of the upper base in the lower trapezoidal structure is less than the length of the lower base in the direction of the upper vertical plate 220 pointing to the lower vertical plate 221; the upper and lower ends of the upper base in the lower trapezoidal structure are respectively provided with lower edge recessed areas, the structure of the two lower edge recessed areas is rectangular structure, the positive electrode lower clamping block 3142 in the positive electrode lower cable 32 is close to one side of the positive electrode lower clamping groove 2210, and the negative electrode lower clamping block 4142 in the negative electrode lower cable 42 is close to one side of the negative electrode lower clamping groove 2211, respectively provided with the lower edge protruding block area matched with the lower edge recessed area, and the two lower edge protruding block areas can be directly clamped to the two lower edge recessed areas;

[0083] The left recessed area 21011a in the above left clamping groove body 21011 is a left trapezoidal structure, the upper base of the left trapezoidal structure is close to one side of the left horizontal plate 210, the lower base is away from one side of the left horizontal plate 210, and the length of the upper base in the left trapezoidal structure is less than the length of the lower base in the direction of the left horizontal plate 210 pointing to the right horizontal plate 211; the left and right ends of the upper base in the left trapezoidal structure are respectively provided with left edge recessed areas 21011b, the structure of the two left edge recessed areas 21011b is rectangular structure, the positive electrode upper clamping block 3141 in the positive electrode upper cable 31 is close to one side of the positive electrode left upper clamping groove 2101, and the positive electrode lower clamping block 3142 in the positive electrode lower cable 32 is close to one side of the positive electrode left lower clamping groove 2102, respectively provided with the left edge protruding block area 31412 matched with the left edge recessed area 21011b, and the two left edge protruding block areas 31412 can be directly clamped to the two left edge recessed areas 21011b;

[0084] The right recessed area in the right slot body is a right trapezoidal structure. The upper base of the right trapezoidal structure is close to one side of the right horizontal plate 211, and the lower base is away from the other side of the right horizontal plate 211. The length of the upper base in the right trapezoidal structure is less than the length of the lower base in the direction of the left horizontal plate 210 pointing to the right horizontal plate 211. Right edge recessed areas are respectively arranged at the left and right ends of the upper base in the right trapezoidal structure. The two right edge recessed areas are rectangular structures. The positive upper clamping block 3141 in the positive upper cable 41 and the negative lower clamping block 4142 in the negative lower cable 42 are respectively provided with right edge protruding block areas matched with the right edge recessed areas. The two right edge protruding block areas can be directly clamped to the two right edge recessed areas.

[0085] The structure of the lower slot body in the positive lower slot 2210 and the negative lower slot 2211 is the same as that of the upper slot body 22011 in the positive upper slot 2201 and the negative upper slot 2202. The structure of the right slot body in the negative right upper slot and the negative right lower slot is the same as that of the left slot body 21011 in the positive left upper slot 2101 and the positive left lower slot 2102. This embodiment will not be specifically described.

[0086] By adopting the above scheme, after the positive upper cable 31, the positive lower cable 32, the negative upper cable 41 and the negative lower cable 42 are inserted, the upper edge protruding block area 31411 and the upper edge recessed area 22011b, the lower edge protruding block area and the lower edge recessed area, the left edge protruding block area 31412 and the left edge recessed area 21011b, and the right edge protruding block area and the right edge recessed area are mutually coordinated, the positive upper cable 31, the positive lower cable 32, the negative upper cable 41 and the negative lower cable 42 are further fixed, and the positive upper cable 31, the negative upper cable 41, the positive lower cable 32 and the negative lower cable 42 are more effectively prevented from loosening, thereby better improving the stability and reliability of the connection.

[0087] In an optional embodiment, in combination with Figure 2 and Figure 3 As shown in the figures, in the direction of the left horizontal plate 210 pointing to the right horizontal plate 211, the thickness of the upper vertical plate 220 is the same as the thickness of the lower vertical plate 221. In the direction of the upper vertical plate 220 pointing to the lower vertical plate 221, the thickness of the left horizontal plate 210 is the same as the thickness of the right horizontal plate 211. The thickness of the upper vertical plate 220 in the direction of the left horizontal plate 210 pointing to the right horizontal plate 211 is greater than the thickness of the left horizontal plate 210 in the direction of the upper vertical plate 220 pointing to the lower vertical plate 221.

[0088] By adopting the above scheme, not only can the positive cable 3 and the negative cable 4 be distinguished, but also the electromagnetic interference of the different polarity cables at the corresponding cross-shaped frame 2 can be shielded, which is also conducive to improving the heat dissipation at the corresponding cross-shaped frame 2.

[0089] In an optional embodiment, continuing to refer toFigure 2 As shown, in the direction of the upper vertical plate 220 pointing to the lower vertical plate 221, the positive upper cable 31 and the positive lower cable 32 are located on the opposite sides of the left horizontal plate 210, and the negative upper cable 41 and the negative lower cable 42 are located on the opposite sides of the right horizontal plate 211; in the direction of the left horizontal plate 210 pointing to the right horizontal plate 211, the positive upper cable 31 and the negative upper cable 41 are located on the opposite sides of the upper vertical plate 220, and the positive lower cable 32 and the negative lower cable 42 are located on the opposite sides of the lower vertical plate 221.

[0090] In the above scheme, in the direction of the upper vertical plate 220 pointing to the lower vertical plate 221, the positive upper cable 31 and the positive lower cable 32 are located on the upper and lower sides of the left horizontal plate 210, and the negative upper cable 41 and the negative lower cable 42 are located on the upper and lower sides of the right horizontal plate 211, that is, the positive upper cable 31 and the positive lower cable 32 are designed side by side in the direction of the upper vertical plate 220 pointing to the lower vertical plate 221, and the negative upper cable 41 and the negative lower cable 42 are designed side by side in the direction of the upper vertical plate 220 pointing to the lower vertical plate 221; in the direction of the left horizontal plate 210 pointing to the right horizontal plate 211, the positive upper cable 31 and the negative upper cable 41 are located on the left and right sides of the upper vertical plate 220, and the positive lower cable 32 and the negative lower cable 42 are located on the left and right sides of the lower vertical plate 221, that is, the positive upper cable 31 and the negative upper cable 41 are designed side by side in the direction of the left horizontal plate 210 pointing to the right horizontal plate 211, and the positive lower cable 32 and the negative lower cable 42 are designed side by side in the direction of the left horizontal plate 210 pointing to the right horizontal plate 211.

[0091] The above layout design not only helps to ensure the neat arrangement and effective management of the positive cable 3 and the negative cable 4, effectively prevents the occurrence of current interference and short circuit, and makes the arrangement of the positive cable 3 and the negative cable 4 more neat and orderly, facilitating maintenance and management. The safety performance of the positive cable 3 and the negative cable 4 is improved by separating the positive and negative poles, reducing the safety hazards caused by damage or aging of the positive cable 3 and the negative cable 4.

[0092] In an alternative embodiment, continuing to refer to Figure 2As shown, the outer surface of the left transverse plate 210 is etched with positive electrode marks 2103, and the outer surface of the right transverse plate 211 is etched with negative electrode marks 2112. The number of the positive electrode marks 2103 and the negative electrode marks 2112 can be multiple, such as the outer surface of the left transverse plate 210 is etched with ++++++…, and the outer surface of the right transverse plate 211 is etched with ————… By the above scheme, not only can the workers quickly and accurately identify and correctly connect the positive cable 3 and the negative cable 4 during installation, maintenance and repair, avoiding equipment damage or safety accidents caused by reverse polarity, but also can help prevent electric shock or short circuit accidents caused by misoperation, providing additional safety protection for workers. At the same time, when the cable for high-voltage direct-current remote supply fails, it can also help maintenance personnel quickly locate the problem and determine whether the positive or negative is the problem, thereby speeding up the troubleshooting and repair speed.

[0093] It can be known from the above embodiment that the cable for high-voltage direct-current remote supply provided by the utility model at least realizes the following beneficial effects:

[0094] Firstly, through the cable for high-voltage direct-current remote supply provided by the utility model, the positive cable and the negative cable are fixed in the insulating cover at the same time, so that the parallel state between the positive cable and the negative cable can be maintained even if there is wind in the natural environment, so as to ensure the stability and safety of power transmission.

[0095] Secondly, through the cable for high-voltage direct-current remote supply provided by the utility model, not only can the deformation or displacement of the positive cable and the negative cable be prevented when they are used for a long time or subjected to external force, so as to ensure the stability and reliability of the positive cable and the negative cable, but also the mechanical strength of the whole cable can be enhanced, so that it can resist the influence of external mechanical stress, such as stretching and extrusion, thereby prolonging the service life of the cable. At the same time, the cross-shaped frame as part of the internal structure of the cable can provide certain protection for the positive cable and the negative cable, preventing them from being directly damaged or interfered by the external environment.

[0096] Thirdly, through the cable for high-voltage direct-current remote supply provided by the utility model, not only can the close contact of the positive upper cable, the negative upper cable, the positive lower cable and the negative lower cable with the cross-shaped frame be ensured, so as to prevent the positive upper cable, the negative upper cable, the positive lower cable and the negative lower cable from loosening, thereby improving the stability and reliability of the connection, but also one or two damaged cables can be easily extracted, without the need to replace the whole cable, thereby reducing the cost.

[0097] The utility model has the mutual cooperation between various technical features, the relationship of supporting each other in function, namely in the technical scheme is not the "simple superposition" of the technical features between the multiple comparison files, so the utility model does not belong to the case of "simple superposition" in the second part fourth chapter of "patent examination guidelines".

[0098] Although some specific embodiments of the utility model have been described in detail by examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the utility model. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims

1. A cable for high voltage direct current off-take, characterised in that, The insulation sheath, the cross-shaped frame, the positive cable and the negative cable; The insulation sheath is a hollow circular structure; The cross-shaped frame is located in the insulation sheath, and the cross-shaped frame comprises a horizontal plate and a vertical plate connected with the horizontal plate, the horizontal plate and the vertical plate are both rectangular in shape, and the horizontal plate and the vertical plate form a cross-shaped structure, and the length extension direction of the horizontal plate is the same as that of the vertical plate; The horizontal plate and the vertical plate divide the hollow circular structure into four accommodation spaces, and each accommodation space is fan-shaped; The positive cable comprises a positive upper cable and a positive lower cable, and the negative cable comprises a negative upper cable and a negative lower cable, and the positive upper cable, the positive lower cable, the negative upper cable and the negative lower cable are respectively inserted into different accommodation spaces; The horizontal plate comprises oppositely arranged left and right horizontal plates, and the vertical plate comprises oppositely arranged upper and lower vertical plates connected with the upper vertical plate, and the left and right horizontal plates and the upper vertical plate form L-shaped structures respectively, and the left and right horizontal plates and the lower vertical plate form inverted L-shaped structures respectively; In the direction of the left horizontal plate pointing to the right horizontal plate, the opposite sides of the upper vertical plate are respectively provided with positive upper clamping grooves and negative upper clamping grooves, the positive upper clamping grooves and the negative upper clamping grooves are recessed towards the side close to the upper vertical plate, the opposite sides of the lower vertical plate are respectively provided with positive lower clamping grooves and negative lower clamping grooves, and the positive lower clamping grooves and the negative lower clamping grooves are recessed towards the side of the lower vertical plate; in the direction of the upper vertical plate pointing to the lower vertical plate, the opposite sides of the left horizontal plate are respectively provided with positive left upper clamping grooves and positive left lower clamping grooves, the positive left upper clamping grooves and the positive left lower clamping grooves are recessed towards the side of the left horizontal plate, the opposite sides of the right horizontal plate are respectively provided with negative right upper clamping grooves and negative right lower clamping grooves, and the negative right upper clamping grooves and the negative right lower clamping grooves are respectively recessed towards the side of the right horizontal plate; The outer layer of the positive upper cable is respectively provided with positive upper clamping blocks matched with the positive upper clamping grooves and the positive left upper clamping grooves, and the two positive upper clamping blocks are respectively clamped into the positive upper clamping grooves and the positive left upper clamping grooves; the outer layer of the positive lower cable is respectively provided with positive lower clamping blocks matched with the positive lower clamping grooves and the positive left lower clamping grooves, and the two positive lower clamping blocks are respectively clamped into the positive lower clamping grooves and the positive left lower clamping grooves; The outer layer of the negative upper cable is respectively provided with negative upper clamping blocks matched with the negative upper clamping grooves and the negative right upper clamping grooves, and the two negative upper clamping blocks are respectively clamped into the negative upper clamping grooves and the negative right upper clamping grooves; the outer layer of the negative lower cable is respectively provided with negative lower clamping blocks matched with the negative lower clamping grooves and the negative right lower clamping grooves, and the two negative lower clamping blocks are respectively clamped into the negative lower clamping grooves and the negative right lower clamping grooves.

2. Cable for high voltage direct current off-take according to claim 1, characterized in that, The upper clamping groove of the positive electrode and the upper clamping groove of the negative electrode each include an upper clamping groove body, and an upper recessed area is formed on the upper clamping groove body, the upper recessed area is recessed towards one side of the upper vertical plate, and along the direction of the upper vertical plate pointing to the lower vertical plate, opposite sides of the upper clamping groove body are also provided with upper edge recessed areas in communication with the upper recessed area; The lower clamping groove of the positive electrode and the lower clamping groove of the negative electrode each include a lower clamping groove body, and a lower recessed area is formed on the lower clamping groove body, the lower recessed area is recessed towards one side of the lower vertical plate, and along the direction of the upper vertical plate pointing to the lower vertical plate, opposite sides of the lower clamping groove body are also provided with lower edge recessed areas in communication with the lower recessed area; The upper left clamping groove of the positive electrode and the lower left clamping groove of the positive electrode each include a left clamping groove body, and a left recessed area is formed on the left clamping groove body, the left recessed area is recessed towards one side of the left horizontal plate, and along the direction of the left horizontal plate pointing to the right horizontal plate, opposite sides of the left clamping groove body are also provided with left edge recessed areas in communication with the left recessed area; The upper right clamping groove of the negative electrode and the lower right clamping groove of the negative electrode each include a right clamping groove body, and a right recessed area is formed on the right clamping groove body, the right recessed area is recessed towards one side of the right horizontal plate, and along the direction of the right horizontal plate pointing to the right horizontal plate, opposite sides of the right clamping groove body are also provided with right edge recessed areas in communication with the right recessed area; The positive electrode upper cable and the negative electrode upper cable are located on opposite sides of the left horizontal plate along the direction of the upper vertical plate pointing to the lower vertical plate, and the positive electrode upper cable and the negative electrode upper cable are located on opposite sides of the right horizontal plate along the direction of the upper vertical plate pointing to the lower vertical plate; The positive electrode upper cable and the negative electrode upper cable are located on opposite sides of the left horizontal plate along the direction of the upper vertical plate pointing to the lower vertical plate, and the positive electrode upper cable and the negative electrode upper cable are located on opposite sides of the right horizontal plate along the direction of the upper vertical plate pointing to the lower vertical plate; The positive electrode upper cable and the negative electrode upper cable are located on opposite sides of the left horizontal plate along the direction of the upper vertical plate pointing to the lower vertical plate, and the positive electrode upper cable and the negative electrode upper cable are located on opposite sides of the right horizontal plate along the direction of the upper vertical plate pointing to the lower vertical plate; The positive electrode upper cable and the negative electrode upper cable are located on opposite sides of the left horizontal plate along the direction of the upper vertical plate pointing to the lower vertical plate, and the positive electrode upper cable and the negative electrode upper cable are located on opposite sides of the right horizontal plate along the direction of the upper vertical plate pointing to the lower vertical plate; 3. The cable for high voltage direct current off-site power supply according to claim 1, characterized by, The thickness of the upper vertical plate along the direction of the left horizontal plate pointing to the right horizontal plate is the same as the thickness of the lower vertical plate, and the thickness of the left horizontal plate along the direction of the upper vertical plate pointing to the lower vertical plate is the same as the thickness of the right horizontal plate; The thickness of the upper vertical plate along the direction of the left horizontal plate pointing to the right horizontal plate is greater than the thickness of the left horizontal plate along the direction of the upper vertical plate pointing to the lower vertical plate.

4. The cable for high voltage direct current off-site power supply according to claim 1, characterized by, The positive electrode upper cable and the negative electrode upper cable are located on opposite sides of the left horizontal plate along the direction of the upper vertical plate pointing to the lower vertical plate, and the positive electrode upper cable and the negative electrode upper cable are located on opposite sides of the right horizontal plate along the direction of the upper vertical plate pointing to the lower vertical plate; The positive upper cable and the negative upper cable are located on opposite sides of the upper vertical plate in a direction of the left horizontal plate pointing to the right horizontal plate, and the positive lower cable and the negative lower cable are located on opposite sides of the lower vertical plate.

5. Cable for high voltage direct current off-take according to claim 4, characterized in that, An outer surface of the left horizontal plate is etched with a positive electrode mark, and an outer surface of the right horizontal plate is etched with a negative electrode mark.

Images