Composite overhead insulated cable

Abstract

The invention discloses a composite overhead insulated cable, and relates to the field of insulated cable devices, the composite overhead insulated cable comprises an insulated heat conduction layer, a plurality of groups of power transmission conductors are arranged in the insulated heat conduction layer, each power transmission conductor is formed by twisting a plurality of copper alloy wire cores, and a protection unit is arranged outside the insulated heat conduction layer. According to the composite overhead insulated cable, the positioning assembly is arranged in the cable, and the deformation limiting assembly and the extrusion buffer assembly are respectively arranged at the positioning assembly, so that multiple groups of power transmission conductors are positioned through the positioning assembly; effective extension of the cable under the conditions of torsion and extrusion force can be ensured through the deformation limiting assembly and the extrusion buffering assembly, so that the limiting assembly and the anti-extrusion assembly do not influence each other and buffer the generated torsion force and extrusion force, the overall pressure resistance of the cable can be improved, the rebound effect of the cable is ensured, and the service life of the cable is prolonged. The overall flexibility of the cable is improved, and the service life of the cable is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of insulated cables, in particular to a composite overhead insulated cable. Background Art

[0002] Composite overhead insulated cable is a cable used for overhead transmission lines. It is a cable that wraps insulating material around the outside of the conductor and is made of a combination of multiple materials or structures. This cable combines the advantages of different materials, can effectively improve the performance of the cable, and is suitable for various complex overhead transmission environments.

[0003] Since the use environment of cables is relatively complex, the overall flexibility and strength of the cables must be ensured during use. The internal structure of the cables is complex and usually contains multiple conductors. These conductors may have different materials, diameters and functions. When the cables are subjected to large external extrusion forces during use, the external protective layer can provide certain protection, but it cannot control the deformation range of the internal structure of the cables, making the internal structure susceptible to irreversible damage and reducing the strength of the cables. Secondly, the insulating layer may be squeezed and deformed, resulting in a decrease in insulation performance, and the internal conductors may undergo relative displacement, affecting the use of the conductors. In view of the shortcomings of the existing technology, we propose a composite overhead insulated cable to solve the above problems. Summary of the invention

[0004] To achieve the above object, the present invention is implemented by the following technical scheme: a composite overhead insulated cable, comprising an insulating heat-conducting layer, a plurality of groups of power transmission conductors are arranged inside the insulating heat-conducting layer, the power transmission conductors are formed by twisting a plurality of copper alloy wire cores, a protection unit is arranged outside the insulating heat-conducting layer, a positioning assembly is arranged inside the insulating heat-conducting layer, and the plurality of groups of power transmission conductors are distributed inside the positioning assembly; The positioning assembly is provided with a deformation limiting assembly and an extrusion buffer assembly. The deformation limiting assembly is respectively installed on the top of multiple groups of transmission conductors. The deformation limiting assembly limits the torsion angle of the cable. The extrusion buffer assembly is installed on the top between two adjacent groups of transmission conductors. The extrusion buffer assembly buffers the extrusion force generated by the cable. A support plate is provided on the top of the deformation limiting assembly, and the support plate cooperates with the extrusion buffer assembly to improve the overall strength of the cable; The deformation limiting assembly comprises an arc-shaped cylinder, an arc-shaped column, a first limiting blocking piece, a second limiting blocking piece, a return spring and a limiting sliding groove, the arc-shaped column is slidably connected inside the arc-shaped cylinder, the first limiting blocking piece and the second limiting blocking piece are respectively fixedly sleeved on the outer peripheral walls of the arc-shaped cylinder and the arc-shaped column, and the two ends of the return spring are respectively fixedly connected to the inner walls of the arc-shaped cylinder and the arc-shaped column; The extrusion buffer assembly includes an extrusion plate, a metal plate, a bending groove, a buffer spring and a reinforcing rib. The bottom of the extrusion plate is respectively slidably connected inside a plurality of support plates. The metal plates are fixedly installed at the top of the extrusion plate at equal intervals. The bending grooves are evenly arranged at the top of the extrusion plate. The plurality of bending grooves and the metal plates are evenly distributed along the length of the extrusion plate. The metal plates and the bending grooves are staggered. The limiting slide grooves are arranged on the outer walls on both sides of the extrusion plate, and the positions of the extrusion plate and the limiting slide grooves correspond to the positions of the arc tube and the arc column. The ends of the arc tube and the arc column that are away from each other are respectively slidably connected inside the limiting slide grooves at the two adjacent groups of extrusion plates.

[0005] Preferably, the positioning assembly includes a mounting shaft and a positioning bracket, the mounting shaft is installed at the center position inside the cable, the positioning bracket is fixedly sleeved on the outer peripheral wall of the mounting shaft, the positioning bracket is composed of multiple groups of support plates, and the multiple groups of support plates are distributed in a ring-shaped and equidistant manner on the outer peripheral wall of the mounting shaft, and the insulating heat-conductive layer is installed between two adjacent groups of support plates.

[0006] Preferably, the positioning bracket is made of a deformable material, the deformation limiting assembly is installed between two adjacent groups of support plates, multiple groups of the deformation limiting assemblies are equidistantly distributed along the length of the support plate, and the deformation limiting assembly supports the two adjacent groups of support plates.

[0007] Preferably, the top of the buffer spring is fixedly connected to the bottom of the extrusion plate, the other end of the buffer spring is fixedly connected to the inner bottom of the support plate, the bottom of the extrusion plate is fixedly connected to the reinforcing rib, and the reinforcing rib is located inside the buffer spring.

[0008] Preferably, the support plate is retractable, and the two ends of the support plate are respectively fixedly connected to the first limit baffle and the second limit baffle, the outer peripheral wall of the transmission conductor is clamped with a clamping plate, and the bottom of the clamping plate is fixedly installed with a support column, and the bottom of the support column is fixedly installed on the surface of the mounting shaft, and multiple groups of support columns are distributed in a ring-shaped and equidistant manner on the outer peripheral wall of the mounting shaft.

[0009] Preferably, the insulating heat-conducting layer is composed of an inner sleeve and an outer sleeve, a flame-retardant layer is wrapped between the inner sleeve and the outer sleeve, the inner circumferential wall of the inner sleeve is in contact with the top of multiple groups of metal plates, and the gaps between the inner sleeve and the multiple groups of power transmission conductors are filled with heat-conducting material.

[0010] Preferably, the protective unit includes a threaded tube and a protective sleeve, the threaded tube is wrapped around the outer peripheral wall of the insulating heat-conducting layer, the protective sleeve is wrapped around the outer peripheral wall of the threaded tube, a heat-conducting column is fixedly installed inside the protective sleeve, multiple groups of the heat-conducting columns are distributed equidistantly in a ring shape, and a heat dissipation channel is formed between two adjacent groups of heat-conducting columns.

[0011] The invention discloses a composite overhead insulated cable, which has the following beneficial effects: 1. The composite overhead insulated cable, by arranging a positioning component inside the cable, and arranging a deformation limiting component and an extrusion buffer component at the positioning component, can ensure the effective extension of the cable under torsion and extrusion force by respectively using the deformation limiting component and the extrusion buffer component while positioning multiple groups of transmission conductors through the positioning component, so that the limiting component and the anti-extrusion component do not affect each other, and the torsion force and the extrusion force generated are buffered respectively, thereby improving the overall compression resistance of the cable, ensuring the cable rebound effect, and improving the overall flexibility and service life of the cable.

[0012] 2. The composite overhead insulated cable, by distributing multiple groups of support plates equidistantly on the outer peripheral wall of the installation shaft and installing multiple groups of transmission conductors between two adjacent groups of support plates, can provide mechanical support for the multiple groups of transmission conductors, effectively prevent mutual squeezing and displacement between the transmission conductors, keep the transmission conductors in a relatively stable position in space, fix the transmission conductors in their respective areas, avoid disorder of the conductor structure due to torsion, and avoid damage to the transmission conductors due to external mechanical forces.

[0013] 3. The composite overhead insulated cable installs a deformation limiter assembly between two adjacent groups of support plates. When the cable is twisted, it can drive the arc column to slide inside the arc tube and deform the internal reset spring to buffer the generated torsional force. When the torsion angle increases, the deformation of the support plate at the positioning bracket intensifies, and the distance between the two adjacent groups of support plates gradually decreases, so that the two groups of limit baffles start to contact and take effect, which can prevent further excessive deformation and ensure that the relative positions of multiple groups of transmission conductors will not change seriously. The force generated during the torsion process will not squeeze the transmission conductors, further improving the protection strength of the multiple groups of transmission conductors and ensuring the effective extension of the cable under torsion.

[0014] 4. The composite overhead insulated cable can effectively buffer the extrusion force generated by the cable by installing an extrusion buffer component on the top of the sub-plate, and a bending groove is provided at the extrusion plate to facilitate the bending and laying of the cable. When the cable is subjected to excessive external extrusion, the extrusion plate can be supported by multiple groups of reinforcing ribs, so that the extrusion plate can rigidly support the generated extrusion force. Moreover, when the extrusion plate is squeezed and slides inside the support plate, the positions of the multiple groups of deformation limit components will not change, and the generated extrusion force can be further rigidly supported by the support plate. The strength of the support plate can disperse the external extrusion force borne by the reinforcing ribs, thereby further improving the overall compression resistance of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the explosion structure of the present invention; Figure 3 It is a schematic diagram of the installation position structure of the positioning component, the deformation limiting component and the extrusion buffer component of the present invention; Figure 4 A side sectional view of the present invention; Figure 5 It is a schematic diagram of the installation structure of the deformation limiting assembly and the extrusion plate of the present invention; Figure 6 This is a schematic diagram of the explosion structure of the deformation limiting component of the present invention; Figure 7 This is a schematic diagram of the explosion structure of the extrusion plate and the support plate of the present invention; Figure 8 A side sectional view of the protection unit of the present invention; Fig. 9 It is a schematic diagram of the structure of the positioning component of the present invention.

[0017] In the figure: 1, insulating heat-conducting layer; 101, inner sleeve; 102, outer sleeve; 103, flame-retardant layer; 2. Transmission conductor; 201. Clamping plate; 202. Support column; 3. Protection unit; 301. Threaded pipe; 302. Protection sleeve; 3021. Heat conducting column; 3022. Heat dissipation channel; 4. Positioning assembly; 401. Mounting shaft; 402. Positioning bracket; 4021. Support plate; 5. Deformation limiting assembly; 501. arc-shaped cylinder; 502. arc-shaped column; 503. first limiting baffle; 504. second limiting baffle; 505. return spring; 506. limiting slide groove; 6. Extrusion buffer assembly; 601. Extrusion plate; 602. Metal plate; 603. Bending groove; 604. Buffer spring; 605. Reinforcement rib; 7. Support plate; 8. Thermal conductive material. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] The embodiment of the invention discloses a composite overhead insulated cable.

[0021] According to the attached Figure 1-9 As shown, it includes an insulating heat-conducting layer 1, a plurality of groups of power transmission conductors 2 are arranged inside the insulating heat-conducting layer 1, and the power transmission conductors 2 are formed by twisting a plurality of copper alloy wire cores, a protection unit 3 is arranged outside the insulating heat-conducting layer 1, and a positioning component 4 is arranged inside the insulating heat-conducting layer 1, and the plurality of groups of power transmission conductors 2 are distributed inside the positioning component 4; Specifically, the positioning component 4 is provided with a deformation limiting component 5 and an extrusion buffer component 6. The deformation limiting component 5 is respectively installed on the top of multiple groups of transmission conductors 2. The deformation limiting component 5 limits the torsion angle of the cable. The extrusion buffer component 6 is installed on the top between two adjacent groups of transmission conductors 2. The extrusion buffer component 6 buffers the extrusion force generated by the cable. Specifically, a support plate 7 is provided on the top of the deformation limiting component 5, and the support plate 7 cooperates with the extrusion buffer component 6 to improve the overall strength of the cable. When the extrusion force generated by the cable is strong, the cooperation of the extrusion buffer component 6 can ensure that the position of the deformation limiting component 5 will not change, and the extrusion force generated can be further rigidly supported by the support plate 7. The strength of the support plate 7 can disperse the external extrusion force borne by the extrusion buffer component 6, thereby improving the overall compression resistance of the cable and improving the overall strength of the cable.

[0022] Specifically, the deformation limiting assembly 5 includes an arc cylinder 501, an arc column 502, a first limiting baffle 503, a second limiting baffle 504, a return spring 505 and a limiting slide groove 506. The arc column 502 is slidably connected to the inside of the arc cylinder 501. The first limiting baffle 503 and the second limiting baffle 504 are fixedly sleeved on the outer peripheral walls of the arc cylinder 501 and the arc column 502 respectively. The two ends of the return spring 505 are fixedly connected to the inner walls of the arc cylinder 501 and the arc column 502 respectively, gradually driving the two groups of limiting baffles on the top of the multiple groups of transmission conductors 2 to slide close to each other, so that the two groups of limiting baffles are in contact. It should be noted that the two groups of limiting baffles are made of metal material, and the distance between the two groups of limiting baffles can be adjusted according to the maximum torsional force borne by the transmission conductor 2, so that the two groups of limiting baffles are in contact with each other and prevent further torsion. This method can control the torsion limit of the cable and ensure that the internal structure of the cable will not be damaged due to excessive torsion.

[0023] Specifically, the extrusion buffer component 6 includes an extrusion plate 601, a metal plate 602, a bending groove 603, a buffer spring 604 and a reinforcing rib 605. By adopting a staggered arrangement of the bending groove 603 and the deformation limiting component 5, when the cable is bent through the bending groove 603, the installed deformation limiting component 5 will not affect the bending of the cable, so that the bending of the cable and the torsion limiting work of the cable do not affect each other. The bottom of the extrusion plate 601 is respectively slidably connected to the inside of the multiple groups of support plates 4021, and the metal plate 602 is equidistantly fixedly installed on the top of the extrusion plate 601. The bending grooves 603 are evenly spaced at the top of the extrusion plate 601, and multiple groups of bending grooves 603 and the metal plate 602 are evenly distributed along the length of the extrusion plate 601. The metal plate 602 and the bending grooves 603 are staggered. When the extrusion force generated by the cable does not exceed the bearing limit of the extrusion plate 601, the reinforcing ribs 605 at the bottom of the extrusion plate 601 do not contact the support plate 4021. When the bearing limit of the extrusion plate 601 is exceeded, the bottom of the reinforcing ribs 605 contacts the support plate 4021, and the extrusion force generated is rigidly supported by the reinforcing ribs 605 to prevent the internal power transmission conductor 2 from being directly squeezed and deformed.

[0024] Specifically, the limiting slide grooves 506 are provided on the outer walls of both sides of the extrusion plate 601, and the positions of the extrusion plate 601 and the limiting slide grooves 506 correspond to the positions of the arc tube 501 and the arc column 502. The ends of the arc tube 501 and the arc column 502 that are away from each other are respectively slidably connected inside the limiting slide grooves 506 of the two adjacent groups of extrusion plates 601. Before the cable is subjected to external extrusion force, the positions of the arc tube 501 and the arc column 502 are located at the bottom of the limiting slide grooves 506, and at the same time, the reinforcing ribs 605 at the bottom of the extrusion plate 601 do not fit the bottom of the support plate 4021. For details, please refer to the attached Figure 3 With attached Figure 7When the external extrusion force exceeds the bearing limit of the extrusion plate 601, the bottom of the reinforcing rib 605 contacts the support plate 4021, and the arc tube 501 and the arc column 502 are located at the top of the limiting slide groove 506, so that the two adjacent groups of extrusion plates 601 slide between the arc tube 501 and the arc column 502, so that the positions of the arc tube 501 and the arc column 502 remain unchanged, and then the support plate 7 on the top of the arc tube 501 and the arc column 502 can disperse the external extrusion force borne by the extrusion plate 601, thereby improving the overall compression resistance of the cable.

[0025] Specifically, the positioning component 4 includes a mounting shaft 401 and a positioning bracket 402. The mounting shaft 401 is installed at the center position inside the cable. The positioning bracket 402 is fixedly sleeved on the outer peripheral wall of the mounting shaft 401. The positioning bracket 402 is composed of multiple groups of support plates 4021. The multiple groups of support plates 4021 are distributed in a ring-shaped and equidistant manner on the outer peripheral wall of the mounting shaft 401. The insulating thermal conductive layer 1 is installed between two adjacent groups of support plates 4021.

[0026] Specifically, the positioning bracket 402 is made of a deformable material, the deformation limiting component 5 is installed between two adjacent groups of support plates 4021, and multiple groups of deformation limiting components 5 are equidistantly distributed along the length of the support plate 4021. The deformation limiting component 5 supports the two adjacent groups of support plates 4021. The positioning bracket 402 is set to a deformable material, such as elastic rubber or shape memory alloy. When the cable is twisted, the positioning bracket 402 can buffer the stress caused by the twisting through its own deformation. It can be twisted and stretched like a spring, absorb the torsional force, and reduce the stress directly transmitted to the conductor. This stress buffering mechanism helps to protect the conductor and maintain its relative position to a certain extent.

[0027] Specifically, the top of the buffer spring 604 is fixedly connected to the bottom of the extrusion plate 601, the other end of the buffer spring 604 is fixedly connected to the inner bottom of the support plate 4021, the bottom of the extrusion plate 601 is fixedly connected to the reinforcing rib 605, and the reinforcing rib 605 is located inside the buffer spring 604. When the cable is subjected to external extrusion force and torsional force, the extrusion plate 601 and the buffer spring 604 can effectively buffer the extrusion force generated, and at the same time, the torsional force generated can be buffered by the return spring 505 inside the arc tube 501 and the arc column 502, and the buffer spring 604 and the return spring 505 are driven to deform respectively. When the external force disappears, the torsional force and the extrusion force are respectively applied, and the buffer spring 604 and the return spring 505 are deformed by themselves, so as to ensure the rebound effect of the cable and improve the overall flexibility of the cable.

[0028] Specifically, the support plate 7 is retractable, and the two ends of the support plate 7 are fixedly connected to the first limit baffle 503 and the second limit baffle 504 respectively. The outer peripheral wall of the transmission conductor 2 is clamped with a clamping plate 201, and the clamping plate 201 and the support column 202 clamp and support the transmission conductor 2. The bottom of the clamping plate 201 is fixedly installed with a support column 202, and the bottom of the support column 202 is fixedly installed on the surface of the installation shaft 401. Multiple groups of support columns 202 are distributed in a circular shape and equidistantly on the outer peripheral wall of the installation shaft 401. During the use of the cable, it is necessary to perform a bending operation. During the bending process, the cooperation between the equidistantly arranged bending grooves 603 and the threaded tube 301 facilitates the bending operation of the cable, which can make the cable easier to bend and control the bending radius. By arranging the bending grooves 603 at specific positions, damage to the internal wires of the cable during the bending process is avoided, and the cable can be smoothly bent to fit the corner of the wall or the shape of the equipment, thereby improving the use effect of the cable.

[0029] Specifically, the insulating heat-conducting layer 1 is composed of an inner sleeve 101 and an outer sleeve 102, and a flame-retardant layer 103 is wrapped between the inner sleeve 101 and the outer sleeve 102. The inner peripheral wall of the inner sleeve 101 is in contact with the top of the multiple groups of metal plates 602, and the gaps between the inner sleeve 101 and the multiple groups of power transmission conductors 2 are filled with a heat-conducting material 8. The heat-conducting material 8 is magnesium oxide powder. Magnesium oxide powder is an excellent heat-conducting insulating material. It is filled between the multiple groups of power transmission conductors 2 and the outer layer of the cable. The magnesium oxide powder can quickly conduct the heat generated by the conductor to prevent heat from accumulating inside the cable. The magnesium oxide powder can ensure that the heat is evenly dissipated, protect the insulation material of the cable from being damaged by high temperature, and extend the service life of the cable. In addition, the inner sleeve 101 can use a soft And the insulating material with good resilience, such as silicone rubber, can play a buffering role when the cable is twisted, reducing the stress on the outer insulating thermal conductive layer 1. The outer sleeve 102 can adopt an insulating material with slightly higher hardness and strong wear resistance and puncture resistance, such as cross-linked polyethylene. Such a combination can effectively protect the internal structure of the outer sleeve 102 and prevent gaps from appearing on the interface, thereby improving the insulation performance of the insulating thermal conductive layer 1. At the same time, by arranging a flame retardant layer 103 between the inner sleeve 101 and the outer sleeve 102, the flame retardant layer 103 can delay or prevent the flame from propagating along the longitudinal direction of the cable, i.e., along the length direction of the cable, and transversely, i.e., between different conductors and insulating layers inside the cable, through physical and chemical means, and can protect the transmission conductor 2 inside the cable.

[0030] Specifically, the protection unit 3 includes a threaded tube 301 and a protection sleeve 302. The threaded tube 301 is wrapped around the outer peripheral wall of the insulating heat-conducting layer 1, and the protection sleeve 302 is wrapped around the outer peripheral wall of the threaded tube 301. A heat-conducting column 3021 is fixedly installed inside the protection sleeve 302. Multiple groups of heat-conducting columns 3021 are distributed in a ring shape with equal distances, and a heat dissipation channel 3022 is formed between two adjacent groups of heat-conducting columns 3021. The heat-conducting columns 3021 are heat-conducting silicone. Heat-conducting silicone is a high thermal conductivity insulating material. It not only has good thermal conductivity, but also can play a certain insulating role. After the conductor inside the cable generates heat, it will first transfer the heat to the surrounding insulating heat-conducting layer 1 through the heat-conducting material 8, and the heat can be evenly distributed in the heat dissipation channel 3022 through the heat-conducting column 3021. It can fill the tiny gaps in the heat dissipation channel 3022 to ensure that heat will not accumulate locally, thereby comprehensively improving the heat dissipation effect of the cable during use, ensuring the normal use of multiple groups of power transmission conductors 2 inside the cable, and improving the service life of the cable.

[0031] In summary, during use, by installing multiple groups of transmission conductors 2 inside the positioning bracket 402, the transmission conductors 2 are fixed inside it, which can first play a role of mechanical support, effectively prevent mutual squeezing and displacement between the transmission conductors 2, and keep the transmission conductors 2 in a relatively stable position in space, thereby avoiding damage to the transmission conductors 2 caused by mechanical external forces. When the cable body is subjected to an external torsional force, the generated force is first distributed to the positioning bracket 402, and the stress generated during the torsion process is buffered by the deformation of the positioning bracket 402 itself; Furthermore, when the cable is twisted, the shear stress generated by the torsional force will act on the support plate 4021 of the positioning bracket 402. This shear stress will cause the support plate 4021 of the positioning bracket 402 to deform, and the angle between two adjacent groups of support plates 4021 will change. Under the action of the torsional force, they will produce relative displacement, thereby being able to drive the arc column 502 between the two adjacent groups of support plates 4021 to slide inside the arc cylinder 501. When the torsional angle increases, the deformation of the support plate 4021 at the positioning bracket 402 intensifies, and the distance between the two adjacent groups of support plates 4021 will gradually decrease. The deformation limiting component 5 begins to work to prevent further excessive deformation, ensuring that the relative positions of the multiple groups of transmission conductors 2 will not change seriously, and the force generated during the torsion process will not squeeze the transmission conductors 2, further improving the protection strength of the multiple groups of transmission conductors 2, and ensuring the effective extension of the cable under torsion. At the same time, when the cable is subjected to external extrusion, the cable is deformed and the multiple groups of power transmission conductors 2 are extruded. The extrusion force generated can act on the extrusion buffer component 6, and the extrusion force can be buffered by the extrusion buffer component 6. First, the force generated acts on the top of the multiple groups of metal plates 602, so that the metal plates 602 drive the extrusion plates 601 to slide inside the support plate 4021, and at the same time, the internal buffer spring 604 can be deformed to effectively buffer the generated pressure. When the generated extrusion force is strong, the reinforcing ribs 605 at the bottom of the extrusion plate 601 contact the inner bottom of the support plate 4021, thereby controlling the extrusion limit to prevent excessive extrusion from easily causing damage to the multiple groups of power transmission conductors 2. While ensuring that the cable can be effectively extended under extrusion, the overall compression resistance of the cable can be improved. It should be noted that when the cable is subjected to excessive external extrusion, the extrusion plate 601 can be supported by multiple groups of reinforcing ribs 605, so that the extrusion plate 601 can rigidly support the generated extrusion force, and when the extrusion plate 601 is squeezed and slides inside the support plate 4021, the positions of the multiple groups of deformation limit assemblies 5 will not change, and the generated extrusion force can be further rigidly supported by the support plate 7. The strength of the support plate 7 can disperse the external extrusion force borne by the reinforcing ribs 605, thereby further improving the overall compression resistance of the cable.

[0032] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A composite overhead insulated cable, comprising an insulating heat-conducting layer (1), wherein a plurality of groups of power transmission conductors (2) are arranged inside the insulating heat-conducting layer (1), wherein the power transmission conductors (2) are formed by twisting a plurality of copper alloy wire cores, and characterized in that: A protection unit (3) is arranged outside the insulating heat-conducting layer (1), a positioning component (4) is arranged inside the insulating heat-conducting layer (1), and a plurality of groups of power transmission conductors (2) are distributed inside the positioning component (4); The positioning assembly (4) is provided with a deformation limiting assembly (5) and an extrusion buffer assembly (6); the deformation limiting assembly (5) is respectively installed on the top of a plurality of groups of power transmission conductors (2); the deformation limiting assembly (5) limits the torsion angle of the cable; the extrusion buffer assembly (6) is installed on the top between two adjacent groups of power transmission conductors (2); the extrusion buffer assembly (6) buffers the extrusion force generated by the cable; A support plate (7) is provided on the top of the deformation limiting component (5), and the support plate (7) cooperates with the extrusion buffer component (6) to improve the overall strength of the cable; The deformation limiting assembly (5) comprises an arc-shaped cylinder (501), an arc-shaped column (502), a first limiting blocking piece (503), a second limiting blocking piece (504), a return spring (505) and a limiting sliding groove (506); the arc-shaped column (502) is slidably connected inside the arc-shaped cylinder (501); the first limiting blocking piece (503) and the second limiting blocking piece (504) are respectively fixedly sleeved on the outer peripheral walls of the arc-shaped cylinder (501) and the arc-shaped column (502); and the two ends of the return spring (505) are respectively fixedly connected to the inner walls of the arc-shaped cylinder (501) and the arc-shaped column (502); The extrusion buffer assembly (6) comprises an extrusion plate (601), a metal plate (602), a bending groove (603), a buffer spring (604) and a reinforcing rib (605); the bottom of the extrusion plate (601) is slidably connected to the inside of a plurality of groups of support plates (4021); the metal plate (602) is fixedly installed at an equal distance on the top of the extrusion plate (601); the bending grooves (603) are evenly arranged on the top of the extrusion plate (601); a plurality of groups of the bending grooves (603) and the metal plate (602) are evenly distributed along the length of the extrusion plate (601); and the metal plate (602) and the bending grooves (603) are arranged in a staggered manner; The limiting slide grooves (506) are provided on the outer walls of both sides of the extrusion plate (601); the positions of the extrusion plate (601) and the limiting slide grooves (506) correspond to the positions of the arc tube (501) and the arc column (502); the ends of the arc tube (501) and the arc column (502) that are away from each other are respectively slidably connected inside the limiting slide grooves (506) at two adjacent groups of extrusion plates (601).

2. A composite overhead insulated cable according to claim 1, characterized in that: The positioning assembly (4) comprises a mounting shaft (401) and a positioning bracket (402); the mounting shaft (401) is mounted at a central position inside the cable; the positioning bracket (402) is fixedly sleeved on an outer peripheral wall of the mounting shaft (401); the positioning bracket (402) is composed of a plurality of groups of support plates (4021); the plurality of groups of support plates (4021) are distributed in an annular shape and at equal intervals on the outer peripheral wall of the mounting shaft (401); and the insulating heat-conducting layer (1) is mounted between two adjacent groups of support plates (4021).

3. A composite overhead insulated cable according to claim 2, characterized in that: The positioning bracket (402) is made of a deformable material, the deformation limiting assembly (5) is installed between two adjacent groups of support plates (4021), and multiple groups of the deformation limiting assemblies (5) are equidistantly distributed along the length of the support plates (4021), and the deformation limiting assemblies (5) support the two adjacent groups of support plates (4021).

4. A composite overhead insulated cable according to claim 1, characterized in that: The top of the buffer spring (604) is fixedly connected to the bottom of the extrusion plate (601), the other end of the buffer spring (604) is fixedly connected to the inner bottom of the support plate (4021), the bottom of the extrusion plate (601) is fixedly connected to the reinforcing rib (605), and the reinforcing rib (605) is located inside the buffer spring (604).

5. A composite overhead insulated cable according to claim 1, characterized in that: The support plate (7) is retractable, and the two ends of the support plate (7) are respectively fixedly connected to the first limit baffle (503) and the second limit baffle (504), the outer peripheral wall of the power transmission conductor (2) is clamped with a clamping plate (201), the bottom of the clamping plate (201) is fixedly mounted with a support column (202), the bottom of the support column (202) is fixedly mounted on the surface of the installation shaft (401), and a plurality of groups of the support columns (202) are distributed in an annular manner and at equal distances on the outer peripheral wall of the installation shaft (401).

6. A composite overhead insulated cable according to claim 1, characterized in that: The insulating heat-conducting layer (1) is composed of an inner sleeve (101) and an outer sleeve (102); a flame-retardant layer (103) is wrapped between the inner sleeve (101) and the outer sleeve (102); the inner peripheral wall of the inner sleeve (101) is in contact with the top of the plurality of metal plates (602); and the gaps between the inner sleeve (101) and the plurality of power transmission conductors (2) are filled with heat-conducting material (8).

7. A composite overhead insulated cable according to claim 1, characterized in that: The protection unit (3) comprises a threaded tube (301) and a protection sleeve (302); the threaded tube (301) is wrapped around the outer peripheral wall of the insulating heat-conducting layer (1); the protection sleeve (302) is wrapped around the outer peripheral wall of the threaded tube (301); a heat-conducting column (3021) is fixedly installed inside the protection sleeve (302); a plurality of groups of the heat-conducting columns (3021) are distributed in an annular manner and at equal intervals, and a heat dissipation channel (3022) is formed between two adjacent groups of heat-conducting columns (3021).

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