A halogen-free flame-retardant fireproof cable

Abstract

The invention discloses a halogen-free flame-retardant fireproof cable, which relates to the technical field of cables. The cable comprises a cable body. Both ends of the cable body are provided with connecting components. The connecting components include a fixed joint and a connecting end. The cable body is provided with a sliding component. Two sliding components are provided. The two sliding components are symmetrically arranged. The sliding component comprises a limit frame. The limit frame is slidably connected to a limit slide. The bottom of the limit slide is rotatably connected with a cooling swivel. The cooling swivel and the fixed joint are matched by magnetic force. A cleaning swivel is provided on one side of the cooling swivel. The invention detects the deformation condition of the cable body through an electric telescopic rod. According to the thermal expansion and contraction deformation state of the middle part of the cable body, the tension of the middle part of the cable body is dynamically adjusted accordingly to avoid continuous excessive deformation of the cable body due to thermal expansion and contraction, so as to maintain the stability of the cable body during the operation of the power system and its service life.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to a halogen-free flame-retardant and fireproof cable. Background Art

[0002] Ordinary plastic insulated cables have poor flame retardancy. After adding flame retardants, their electrical insulation is reduced. When burned, they produce a large amount of harmful smoke and toxic halogen gas, which is extremely harmful to the environment and people's lives in the event of a fire.

[0003] As the industrial market pays more and more attention to environmental protection, the application of environmentally friendly cables in modern industrial and civil fields has also received more and more attention. How to make the cables flame retardant, less smoke, and no halogen release in high temperature environments is an important indicator for selecting cables.

[0004] A Chinese patent with application number 202121252256.3 discloses a halogen-free, low-smoke, and highly flame-retardant cable, including a conductive unit, wherein the conductive unit includes a predetermined number of inner cores, the inner cores are formed by twisting multiple cable cores, the inner cores are filled with water-blocking yarn, and an insulating layer is arranged outside each of the inner cores, and a fire-blocking layer, a heat-insulating layer, and an outer sheath are arranged in sequence outside the conductive unit.

[0005] A Chinese patent application with application number 202410407416.9 discloses an intelligent fireproof cable. Through the setting of a fireproof monitoring sleeve, in cooperation with a color sensor and a temperature-sensitive coating, the cable has the effect of intelligently monitoring the temperature of the surrounding environment. When the temperature is abnormal, the alarm can be triggered to automatically alarm. Obvious color changes may occur at the temperature abnormality, which can reduce the workload of staff in pinpointing abnormalities when handling abnormalities and speed up the handling of abnormalities. However, when the temperature of the cable is abnormal, the high-temperature area cannot be cooled in time. The cable has low heat dissipation efficiency relying solely on its own. At the same time, the attachments on the cable will cause corrosion damage to the cable, further reducing the service life of the cable.

[0006] In addition, the heat generated by the cable itself during use will cause the cable to expand thermally, and the cable will be squeezed and deformed under the action of the thermal expansion force. The current cables can only absorb the expansion force by themselves. When the cable is excessively deformed, the risk of safety accidents will increase.

[0007] Therefore, a halogen-free flame retardant and fireproof cable is proposed to solve the above problems. Summary of the invention

[0008] The purpose of the present invention is to disclose a halogen-free flame-retardant and fire-proof cable to solve the problems raised in the above background technology.

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: A halogen-free flame-retardant fireproof cable, comprising a cable body, two ends of the cable body are provided with connecting components, the connecting components include a fixed joint and a connecting end, a sliding component is provided on the cable body, two sliding components are provided, and the two sliding components are symmetrically arranged;

[0010] The sliding assembly comprises a limit frame, a limit slide seat is slidably connected to the limit frame, a cooling swivel is rotatably connected to the bottom of the limit slide seat, the cooling swivel is matched with the fixed joint by magnetic force, and a cleaning swivel is provided on one side of the cooling swivel;

[0011] A fan blade is provided on the inner side of the cooling swivel, a clamping block is provided on the side of the cooling swivel close to the cleaning swivel, a clamping slot corresponding to the clamping block is provided on the side of the cleaning swivel close to the cooling swivel, an electromagnetic latch is provided inside the clamping slot, arc-shaped airbags are provided on both sides of the cleaning swivel, an electric telescopic rod is provided between two adjacent arc-shaped airbags, and the sides of the two arc-shaped airbags close to each other are fixedly connected to the two sides of the electric telescopic rod.

[0012] Optionally, the cable body comprises a core and a first fiber layer, the cores are provided with five, the five cores include three power cores, one neutral core and one ground core, the five cores have the same structure, the core comprises a conductor, a fireproof layer is provided on the outside of the conductor, and an insulating layer is provided on the outside of the fireproof layer;

[0013] The gap between the wire core and the first fiber layer is filled with a flame retardant layer, a copper tube layer is provided on the outside of the first fiber layer, a second fiber layer is provided on the outside of the copper tube layer, a protective layer is provided on the outside of the second fiber layer, a third fiber layer is provided on the outside of the protective layer, an outer sheath is provided on the outside of the third fiber layer, a temperature detector is provided on the outside of the outer sheath, the temperature detector is a linear temperature detector, and the temperature detection wire of the linear temperature detector is spirally wound around the circumference of the outer sheath.

[0014] Optionally, the conductor is a soft copper conductor, the fireproof layer is an inorganic mineral fireproof layer, the insulating layer is a ceramic polyolefin insulating layer, the first fiber layer, the second fiber layer and the third fiber layer are all alkali-free glass fiber tape layers, the flame retardant layer is a highly flame retardant inorganic filling rope, the copper tube layer is a corrugated copper tube layer, the protective layer is a ceramic polyolefin sheath, and the outer sheath is a low-smoke halogen-free flame retardant polyolefin sheath.

[0015] Optionally, a fixing mechanism for the connecting end is provided in the fixed joint, two ends of the limit frame are provided on the fixed joint and the connecting end, the limit frame includes a fixing plate and a limit shaft, the fixed joint and the connecting end are fixedly connected to the limit shaft through the fixing plate, a limit hole corresponding to the limit shaft is provided on the limit slide seat, electromagnets are respectively provided on the sides where the fixed joint and the connecting end are close to each other, and a magnetic adsorption block is provided on the side of the cooling swivel close to the fixed joint.

[0016] Optionally, a tooth groove is provided inside the limiting slide seat, a ring groove is provided at the bottom of the tooth groove, a gear is rotatably connected inside the tooth groove, the gear is driven by a motor, a gear ring is movably connected inside the ring groove, the rack on the outside of the gear ring is meshed with the gear, and the inner side of the gear ring is fixedly connected to the outer side of the cooling rotating ring.

[0017] Optionally, a plurality of the fan blades are provided, and the plurality of the fan blades are distributed in an array with the center point of the cooling swivel as the center of the circle, and one end of the fan blade away from the cable body passes through the cooling swivel.

[0018] Optionally, a plurality of cleaning swivels are provided, a clamping block is provided on one side of the cleaning swivel away from the clamping groove, and a scraping pad layer is provided on the inner side of the arc-shaped airbag.

[0019] Optionally, a contraction space for the movable end of the electric telescopic rod is reserved on the fixed end of the electric telescopic rod, the connecting material of the arc-shaped airbag close to the electric telescopic rod is not affected by thermal expansion and contraction, and a tension sensor and a pressure sensor are provided on the telescopic end of the electric telescopic rod.

[0020] Technical effects and advantages of the present invention:

[0021] 1. The cable structure of the present invention adopts copper tube layer, protective layer and sheath with excellent performance, mineral insulation material with good environmental performance, multi-layer insulation and heat insulation protection, so that the cable has higher temperature resistance level, safer electrical performance, soft, low smoke, halogen-free performance, good fireproof effect, and can effectively suppress internal and external electromagnetic interference, and has good shielding performance.

[0022] 2. When the cable body needs to dissipate heat, the present invention moves the cooling swivel to the high-temperature area under the action of the magnetic force between the cooling swivel and the fixed joint. During the rotation of the cooling swivel, the high temperature generated by the cable body is quickly dissipated, thereby achieving the heat dissipation effect on the cable body and ensuring the stability of the cable body when in use.

[0023] 3. The present invention regularly utilizes the magnetic force of the cooling swivel and the fixed joint to move the cleaning swivel together with the cooling swivel horizontally along the cable body. During this process, the cleaning swivel and the cooling swivel rotate synchronously, and the rotation of the arc-shaped airbag is utilized to clean away bird droppings and other attachments on the outside of the cable body.

[0024] 4. The present invention detects the deformation state of the cable body through an electric telescopic rod, and dynamically adjusts the tension in the middle of the cable body according to the deformation state of the middle of the cable body due to thermal expansion and contraction, so as to avoid continuous excessive deformation of the cable body due to thermal expansion and contraction, so as to maintain the stability of the cable body during the operation of the power system and its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the cable body of the present invention;

[0026] Figure 2 This is a schematic diagram of the cross-sectional structure of the cable body of the present invention;

[0027] Figure 3 It is a schematic diagram of the wire core material layer structure of the cable body of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the connecting assembly and the sliding assembly of the present invention;

[0029] Figure 5 It is a schematic diagram of the double sliding assembly structure of the present invention;

[0030] Figure 6 It is a schematic diagram of the internal structure of the limiting slide of the present invention;

[0031] Figure 7 It is a schematic diagram of the cleaning swivel structure of the present invention.

[0032] In the figure: 1. Cable body; 101. Conductor; 102. Fireproof layer; 103. Insulation layer; 104. Flame retardant layer; 105. First fiber layer; 106. Copper tube layer; 107. Second fiber layer; 108. Protective layer; 109. Third fiber layer; 110. Outer sheath; 111. Linear temperature detector; 2. Connecting assembly; 201. Fixed joint; 2011. Electromagnet; 2012. Limiting frame; 202. Connecting end; 3, sliding assembly; 301, limiting slide; 3011, tooth groove; 3012, gear; 20121, fixing plate; 20122, limiting shaft; 3013, ring groove; 302, cooling swivel; 3021, tooth ring; 3022, fan blade; 3023, clamping block; 303, cleaning swivel; 3031, arc-shaped airbag; 30311, scraping pad layer; 3032, clamping groove; 3033, electric telescopic rod. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from the description. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0035] Embodiment 1

[0036] See also Figure 1-3 The present embodiment discloses a halogen-free flame-retardant fireproof cable, comprising a cable body 1, the cable body 1 comprising a core and a first fiber layer 105, the cores are provided with five, the five cores include three power cores, one neutral core and one ground core, the five cores have the same structure, the core comprises a conductor 101, a fireproof layer 102 is provided on the outside of the conductor 101, an insulating layer 103 is provided on the outside of the fireproof layer 102, a gap between the core and the first fiber layer 105 is filled with a flame-retardant layer 104, the first A copper tube layer 106 is provided on the outside of the fiber layer 105, a second fiber layer 107 is provided on the outside of the copper tube layer 106, a protective layer 108 is provided on the outside of the second fiber layer 107, a third fiber layer 109 is provided on the outside of the protective layer 108, an outer sheath 110 is provided on the outside of the third fiber layer 109, a temperature detector is provided on the outside of the outer sheath 110, and the temperature detector is a linear temperature detector 111. The temperature detection line of the linear temperature detector 111 is spirally wound around the circumference of the outer sheath 110.

[0037] Among them, three power cores, one neutral core, one ground core and the flame retardant layer 104 are twisted together to form a cable core, the conductor 101 is a soft copper conductor, the fireproof layer 102 is an inorganic mineral fireproof layer, the insulating layer 103 is a ceramic polyolefin insulating layer, the first fiber layer 105, the second fiber layer 107 and the third fiber layer 109 are all alkali-free glass fiber tape layers, the flame retardant layer 104 is a highly flame-retardant inorganic filling rope, and the copper tube layer 106 is a seamless welded corrugated copper tube layer. Specifically, the copper tube layer 106 adopts a structure of copper tape longitudinally wrapped seamless welded corrugation, which is soft and has good flexibility. The melting point of copper is 1083°C, and the high melting point of copper can also play a good fire-proofing role. In addition, the copper tube layer 106 can prevent the external electromagnetic field from interfering with the signal of the cable body 1, and play a shielding and protective role. The protective layer 108 is a ceramic polyolefin sheath. The ceramic polyolefin sheath can quickly crust and solidify at high temperature to form a layer of ceramic-like inorganic matter, which has the characteristics of fire resistance, heat insulation and temperature insulation, and protects the normal operation of the cable core. The outer sheath 110 is a low-smoke halogen-free flame-retardant polyolefin sheath. This material has flame retardant properties, does not contain halogen, does not burn when encountering fire, and does not produce toxic black smoke.

[0038] Embodiment 2

[0039] See also Figure 1-7, connection components 2 are provided at both ends of the cable body 1, and the connection components 2 include a fixed joint 201 and a connection end 202. A fixing mechanism for the connection end 202 is provided in the fixed joint 201. A sliding component 3 is provided on the cable body 1. Two sliding components 3 are provided. The two sliding components 3 are symmetrically arranged. Multiple cable bodies 1 are fixedly connected by docking and locking the fixed joint 201 and the connection end 202. Through the arrangement of the two sliding components 3, when high temperature appears locally in the cable body 1 and heat dissipation is required, the nearest sliding component 3 is moved to the high temperature area for heat dissipation, thereby improving the heat dissipation response and processing efficiency.

[0040] Among them, the sliding component 3 includes a limit frame 2012, and the two ends of the limit frame 2012 are arranged on the fixed joint 201 and the connecting end 202. Specifically, the limit frame 2012 includes a fixed plate 20121 and a limit shaft 20122, and the fixed joint 201 and the connecting end 202 are fixedly connected to the limit shaft 20122 through the fixed plate 20121.

[0041] The limit frame 2012 is slidably connected to a limit slide 301, and a limit hole corresponding to the limit shaft 20122 is provided on the limit slide 301. The bottom of the limit slide 301 is rotatably connected to a cooling swivel 302, and a fan blade 3022 is provided on the inner side of the cooling swivel 302. There are multiple fan blades 3022, and the multiple fan blades 3022 are distributed in an array with the center point of the cooling swivel 302 as the center of the circle. The end of the fan blade 3022 away from the cable body 1 passes through the cooling swivel 302. Through the synchronous rotation of the cooling swivel 302 and the fan blade 3022, the heat dissipation efficiency of the cable body 1 is accelerated. The cooling swivel 302 and the fixed joint 201 are matched by magnetic force, and a cleaning swivel 303 is provided on one side of the cooling swivel 302.

[0042] Specifically, a tooth groove 3011 is provided inside the limiting slide 301, and a ring groove 3013 is provided at the bottom of the tooth groove 3011. The tooth groove 3011 is rotatably connected to a gear 3012, and the gear 3012 is driven by a motor. The ring groove 3013 is movably connected to a gear ring 3021. The rack on the outer side of the gear ring 3021 is meshed with the gear 3012, and the inner side of the gear ring 3021 is fixedly connected to the outer side of the cooling swivel 302. Driven by the motor, the gear 3012 cooperates with the gear ring 3021 to drive the cooling swivel 302 and the cleaning swivel 303 to rotate. The cooling swivel 302 accelerates the heat dissipation of the cable body 1, and the cleaning swivel 303 eliminates the attachments on the cable body 1.

[0043] Specifically, an electromagnet 2011 is provided on the side where the fixed joint 201 and the connecting end 202 are close to each other, and a magnetic adsorption block is provided on the side where the cooling swivel 302 is close to the fixed joint 201. Under the cooperation of the magnetic force of the electromagnet 2011 and the magnetic adsorption block, the cooling swivel 302 and the cleaning swivel 303 are moved horizontally under the limiting action of the limiting frame 2012.

[0044] Furthermore, a block 3023 is provided on one side of the cooling swivel 302 close to the cleaning swivel 303, and a slot 3032 corresponding to the block 3023 is provided on one side of the cleaning swivel 303 close to the cooling swivel 302. An electromagnetic latch is provided inside the slot 3032. The electromagnetic latch is used to connect the slot 3032 of the cleaning swivel 303 with the block 3023 of the cooling swivel 302 and lock them to maintain the stability of the cleaning swivel 303 and the cooling swivel 302 when they rotate synchronously.

[0045] Arc-shaped airbags 3031 are provided on both sides of the cleaning swivel 303. In the initial state, there is a gap between the arc-shaped airbags 3031 and the cable body 1, and gas can flow through the gap. An electric telescopic rod 3033 is provided between two adjacent arc-shaped airbags 3031. The sides of the two arc-shaped airbags 3031 close to each other are fixedly connected to the two sides of the electric telescopic rod 3033. After the arc-shaped airbags 3031 are expanded, the contraction of one of the electric telescopic rods 3033 can form a local opening on the arc-shaped airbag 3031, so that the gas inside the cleaning swivel 303 is discharged outward through the opening to avoid the generation of toxic gas or smoke when the cable body 1 burns and causing harm to nearby personnel.

[0046] There are multiple cleaning swivels 303, and a blocking block 3023 is provided on one side of the cleaning swivel 303 away from the slot 3032. After the multiple cleaning swivels 303 are docked with the blocking block 3023 in the slot 3032, they are connected through the electromagnetic pins in the slot 3032 to form an integrated structure. After the electromagnetic pin in the slot 3032 of a cleaning swivel 303 releases the lock on the blocking block 3023, the cleaning swivel 303 of this section is detached separately.

[0047] A contraction space for the movable end of the electric telescopic rod 3033 is reserved on the fixed end of the electric telescopic rod 3033. The connecting material of the arc-shaped airbag 3031 close to the electric telescopic rod 3033 is not affected by thermal expansion and contraction. The arc-shaped airbag 3031 is fixedly connected to the electric telescopic rod 3033 through the connecting material. The contraction space prevents the connecting material from moving with the telescopic end and getting stuck at the telescopic part of the fixed end and the movable end of the electric telescopic rod 3033 when the telescopic end of the electric telescopic rod 3033 contracts. When the telescopic end of the electric telescopic rod 3033 contracts, the connecting material of the telescopic end moves in the contraction space without entering the telescopic part of the fixed end and the movable end of the electric telescopic rod 3033.

[0048] When in use, multiple cable bodies 1 are connected and fixed by the docking and locking of the fixed joint 201 and the connecting end 202 to extend the length of the cable body 1. An external support portion corresponding to the laying path of the cable body 1 is provided on the top of each section of the cable body 1, and is fixedly connected to the external support portion through a fixing plate 20121, so that the fixed joint 201 and the connecting end 202 can stably support the wiring point of the two cable bodies 1.

[0049] During use, the temperature detection line of the linear temperature detector 111 is used to detect the heat generated by the cable body 1 as a whole during operation. The linear temperature detector 111 is preset with a temperature sensing threshold T1. When the local temperature detected on the cable body 1 reaches the threshold T1, it means that the cable body 1 needs to dissipate heat at this time. In this regard, through the cooperation of the electromagnet 2011 and the magnetic adsorption block on the cooling swivel 302, the cooling swivel 302 is moved to the high temperature area under the action of the magnetic repulsion between the electromagnet 2011 and the magnetic adsorption block, and then the motor is started and drives the gear 3012 to rotate. Under the cooperation of the gear 3012 and the gear ring 3021, the cooling swivel 302 rotates rapidly. During the process, the high temperature generated locally in the cable body 1 is absorbed by the fan blades 3022 and conducted outwardly through one end of the fan blades 3022. At the same time, the cooling swivel 302 uses multiple fan blades 3022 to accelerate the rapid dissipation of the internal high-temperature gas during the rotation process, thereby achieving the heat dissipation effect on the high-temperature area of ​​the cable body 1, so as to improve the stability of the cable body 1 during use. When the temperature in the high-temperature area drops below the temperature threshold T1, it indicates that the cooling of the high-temperature area of ​​the cable body 1 is completed. At this time, the magnetic attraction between the electromagnet 2011 and the magnetic adsorption block drives the cooling swivel 302 to move and reset in the direction of the fixed joint 201 under the limiting action of the limiting shaft 20122 on the limiting slide 301.

[0050] It should be further explained that, during use, when there is no local high temperature phenomenon on the cable body 1, the electromagnet 2011 on the fixed joint 201 and the magnetic force of the magnetic adsorption block on the cooling swivel 302 are still periodically coordinated to drive the cooling swivel 302 and the cleaning swivel 303 to move away from the fixed joint 201. At the same time, the cooling swivel 302 and the cleaning swivel 303 are driven by the meshing of the gear ring 3021 and the gear 3012 to rotate. During the rotation of the cleaning swivel 303, the arc-shaped airbag 3031 rotates synchronously. The cleaning swivel 303 is rotated while moving horizontally, and cooperates with the arc-shaped airbag 3031 to rotate to clean up the bird droppings and other attachments on the outside of the cable body 1. The flexible material of the arc-shaped airbag 3031 itself can avoid damage to the cable body 1 during the cleaning process. Furthermore, a scraping pad layer 30311 is provided on the inner side of the arc-shaped airbag 3031. The scraping pad layer 30311 is utilized to increase the friction between the arc-shaped airbag 3031 and the cable body 1, thereby improving the efficiency of removing attachments and avoiding the corrosion of the attachments on the cable.

[0051] On the other hand, although the cable body 1 has multiple layers of protection, when the cable body 1 is damaged or there are combustibles around it during use, the cable body 1 may still be ignited, thereby causing a greater fire risk. In this regard, the following solution is provided to solve the above problem:

[0052] By presetting a temperature sensing threshold value T2 in the linear temperature sensing detector 111, the temperature threshold value T2> the temperature threshold value T1, and the temperature corresponding to the temperature threshold value T2 is the temperature threshold value when the cable body 1 is on fire. When the linear temperature sensing detector 111 detects through the temperature sensing detection line that the local temperature of the cable body 1 reaches the temperature threshold value T2, under the magnetic repulsion of the electromagnet 2011 on the magnetic adsorption block, the cooling swivel 302 and the cleaning swivel 303 move toward the fire area, and the middle of the cleaning swivel 303 is moved to the fire area. Corresponding to the fire area, at this time, the movable end of the electric telescopic rod 3033 is pressed against the side wall of the cable body 1, and the two arc-shaped air bags 3031 expand thermally due to the high temperature in the fire area. The two arc-shaped air bags 3031 expand inward to form a seal on both sides of the cleaning swivel 303, and the internal space of the cleaning swivel 303 is isolated from the external air, thereby achieving fire extinguishing at the fire point, and at the same time, the harmful gases generated during the fire are sealed inside the cleaning swivel 303, and are discharged after being processed after the maintenance personnel arrive.

[0053] Next, after the lock of the block 3023 on the cooling swivel 302 is released by the electromagnetic latch in the slot 3032, the magnetic attraction of the electromagnet 2011 on the magnetic adsorption block again moves the cooling swivel 302 toward the fixed joint 201 and resets, wherein a plurality of cleaning swivels 303 are provided, and the plurality of cleaning swivels 303 have the same structure. After the block 3023 and the slot 3032 are docked, the electromagnetic latch in the slot 3032 locks and fixes the block 3023. Based on this, when one of the cleaning swivels 303 corresponds to a fire area and After the extension of the movable end of the electric telescopic rod 3033 and the expansion of the arc-shaped airbag 3031 form a seal on the fire area, the electromagnetic latch releases the lock of the card slot 3032 on the card block 3023, and then the cleaning swivel 303 corresponding to the fire area is separated from the cooling swivel 302 under the drive of the magnetic attraction of the electromagnet 2011 on the magnetic adsorption block, so that the cooling swivel 302 can continue to maintain horizontal movement under the cooperation of the magnetic force of the electromagnet 2011 and the magnetic adsorption block, so as to achieve fire extinguishing or heat dissipation in other fire areas or high-temperature areas, thereby improving the flexibility of the device when used.

[0054] Among them, the length of the cleaning swivel 303 is set according to actual use needs to adapt to different ranges of fire. In actual use, according to the detection of the temperature of the cable body 1 by the linear temperature detector 111, the fire range of the cable body 1 is actively judged, and the cleaning swivel 303 adapted to the fire range corresponds to the fire area to achieve targeted fire extinguishing of the fire area, and at the same time, an alarm signal is issued to remind maintenance personnel to maintain the cable body 1 in time. During maintenance work, the cleaning swivel 303 helps maintenance personnel to clearly find the actual fire location.

[0055] Embodiment 3

[0056] See also Figure 1-7 As shown, in actual use, the cable body 1 is affected by thermal expansion and contraction. Since both ends of the cable body 1 are fixed and restricted by the connecting components 2, the cable body 1 cannot be extended to both ends, which will in turn cause deformation of a certain part of the cable body 1. The protective material in the deformed area will be excessively squeezed and stretched, thereby increasing the risk of safety accidents of the cable body 1. In this regard, the following solution is provided to solve the above problem:

[0057] A tension sensor is provided on the telescopic end of the electric telescopic rod 3033. Tension thresholds F1 and F0 are preset in the tension sensor. F0 is the tension threshold detected by the tension sensor when the cable body 1 is in a horizontal state. The tension threshold F1>F0.

[0058] A margin section for thermal expansion and contraction is reserved on the cable body 1. The margin section of the cable body 1 is located between the fixed joint 201 and the cooling swivel 302. According to actual use needs, the margin section of the cable body 1 can be set as a flexible section. The number of margin sections can be set to two, and the other margin section can be set at one end of the connection end 202 of the cable body 1.

[0059] In the initial state, the fixed joint 201 and the cooling swivel 302 are kept at a specific distance by utilizing the cooperation of the electromagnet 2011 and the magnetic adsorption block in the cooling swivel 302. The remaining section of the cable body 1 is pressed against the cable body 1 through the electric telescopic rod 3033, stably maintained between the fixed joint 201 and the cooling swivel 302, and the cable body 1 is kept straight, while the tension force remains stable.

[0060] When the tension sensor detects that the tension threshold reaches F1, it first actively determines that the cable body 1 between the two sliding components 3 has contracted, and uses the contraction of the telescopic end of the electric telescopic rod 3033 to release the restriction on the cable body 1. At the same time, the excess section can be added to the cable body 1 between the two sliding components 3 under the drive of the contraction force of the cable body 1 to weaken the contraction force of the cable body 1 between the two sliding components 3. In the process of the excess section moving and supplementing toward the middle of the cable body 1, the telescopic ends of multiple electric telescopic rods 3033 are repeatedly contracted and extended synchronously to achieve intermittent movement of the excess section toward the middle of the cable body 1 to avoid excessive contraction of the cable body 1 causing a decrease in tension. When the tension threshold is lower than F1, it indicates that the contraction force of the cable body 1 is eliminated. At this time, the telescopic end of the electric telescopic rod 3033 remains extended and continues to maintain a tight positioning against the cable body 1.

[0061] In the above process, if the tension threshold detected by the tension sensor remains at F1 after the telescopic end of the electric telescopic rod 3033 has been repeatedly contracted and extended, it is actively judged that thermal expansion and extension have occurred in the middle part of the cable body 1, causing the cable body 1 to bend, and the expansion force of the cable body 1 cannot restore the cable body 1 to be straight. At this time, the tension threshold F1 detected by the tension sensor is generated by the expansion force of the cable body 1 toward both ends. In this regard, the telescopic end of the electric telescopic rod 3033 close to the fixed joint 201 is first contracted to release the restriction on the cable body 1.

[0062] Then, the electric telescopic rod 3033 close to the fixed joint 201 releases the restriction on the cable body 1 by contracting the telescopic end, and then, with the cooperation of the electromagnet 2011 and the magnetic adsorption block, the cooling swivel 302 and the cleaning swivel 303 are moved away from the fixed joint 201. After moving a specified distance, the electric telescopic rod 3033 continues to press against the cable body 1 for restriction by extending the telescopic end, and then, with the cooperation of the magnetic attraction of the electromagnet 2011 and the magnetic adsorption block, the cooling swivel 302 and the cleaning swivel 303 are moved toward the fixed joint 201. During the movement, the cable section in the middle of the cable body 1 is pulled toward the fixed joint 201 under the action of the clamping force of the electric telescopic rod 3033 on the cable body 1. When the tension threshold detected by the tension sensor returns to the threshold F0, it indicates that the cable body 1 is in a straight state at this time. At this time, the electromagnet 2011 maintains the magnetic attraction to the magnetic adsorption block to keep the cable body 1 in the straight state at this time.

[0063] In this way, the tension in the middle of the cable body 1 can be dynamically adjusted according to the thermal expansion and contraction deformation state of the middle of the cable body 1, thereby preventing the cable body 1 from being continuously over-deformed due to thermal expansion and contraction, so as to maintain the stability of the cable body 1 during the operation of the power system and its service life.

[0064] In addition, during use, the cable body 1 is affected by the thermal expansion force, and the cable body 1 will bend. However, when the cable body 1 is subjected to uneven force as a whole, the cable body 1 will be partially over-folded. The existence of the folded area will serve as a node for releasing the thermal expansion force of the cable body 1. As the cable body 1 expands and contracts with heat, the folded area will be folded repeatedly, thereby causing damage to the conductor 101 and damage and fracture of the protective material in the folded area. In this regard, the following solution is provided to solve the above problem:

[0065] A pressure sensor is provided on the telescopic end of the electric telescopic rod 3033 , and a pressure threshold value P1 is preset in the pressure sensor.

[0066] Through the magnetic coordination of the electromagnet 2011 and the magnetic adsorption block, when the cooling swivel 302 and the cleaning swivel 303 are regularly driven by the electromagnet 2011 to move toward the middle of the cable body 1, the cooling swivel 302 and the cleaning swivel 303 rotate synchronously with the coordination of the gear 3012 and the gear ring 3021.

[0067] During the rotation process, if the cable body 1 is not straight, the pressure sensor corresponding to the folding deformation of the cable body 1 will detect that the pressure threshold reaches P1. At this time, the motor will stop driving the gear 3012, and the electromagnet 2011 will no longer enhance the magnetic repulsion force on the magnetic adsorption block.

[0068] It should be noted that before the cooling swivel 302 and the cleaning swivel 303 near the fixed joint 201 move toward the middle of the cable body 1, the electric telescopic rod 3033 on the cleaning swivel 303 will release the tight limit on the cable body 1. At this time, the release of the remaining section of the cable body 1 will cause the cable body 1 to be unable to be straight in a natural state. Therefore, when the remaining section near the fixed joint 201 is released, the cleaning swivel 303 near the connecting end 202 is retracted through the telescopic end of the electric telescopic rod 3033, and then the cleaning swivel 303 near the connecting end 202 is retracted by the electromagnet 2011 and the magnetic adsorption block on the connecting end 202. With the cooperation of magnetic force, the cleaning swivel 303 near the connection end 202 also moves a distance toward the middle of the cable body 1, and then the cleaning swivel 303 near the connection end 202 extends the telescopic end of the electric telescopic rod 3033 to tighten the cable body 1 to a limit position, and is pulled back toward the connection end 202 under the traction of the magnetic attraction of the electromagnet 2011, so that the remaining section of the cable body 1 is transferred to a position close to the connection end 202. At the same time, according to the tension sensor on the electric telescopic rod 3033 close to the connection end 202, when the tension sensor detects that the tension threshold reaches F0, it indicates that the cable body 1 as a whole tends to be straight at this time.

[0069] At this time, the cooling swivel 302 and the cleaning swivel 303 near the fixed joint 201 are further enhanced by the magnetic repulsion of the electromagnet 2011 on the fixed joint 201, so that the cleaning swivel 303 continues to move toward the folding area. At the same time, the motor continues to drive the gear 3012 to rotate. When the cleaning swivel 303 rotates, the pressure of the telescopic end of the electric telescopic rod 3033 repeatedly acts on the folding protruding area to gradually squeeze the folding protruding area inward. When the pressure threshold detected by the pressure sensor at the telescopic end of the electric telescopic rod 3033 is lower than P1, it indicates that the folding protruding area has completed the inward squeezing and the folding area has returned to flatness. Subsequently, the electromagnet 2011 near the fixed joint 201 cooperates with the magnetic attraction force between the magnetic adsorption block to move the cooling swivel 302 and the cleaning swivel 303 toward the fixed joint 201 and reset.

[0070] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A halogen-free flame-retardant fireproof cable, comprising a cable body (1), wherein both ends of the cable body (1) are provided with connection components (2), wherein the connection components (2) comprise a fixed joint (201) and a connection end (202), wherein: The cable body (1) is provided with a sliding assembly (3), two sliding assemblies (3) are provided, and the two sliding assemblies (3) are symmetrically arranged; The sliding assembly (3) comprises a limit frame (2012), a limit slide seat (301) is slidably connected to the limit frame (2012), a cooling swivel (302) is rotatably connected to the bottom of the limit slide seat (301), the cooling swivel (302) and the fixed joint (201) are matched by magnetic force, and a cleaning swivel (303) is provided on one side of the cooling swivel (302); A fan blade (3022) is provided on the inner side of the cooling rotating ring (302); a clamping block (3023) is provided on the side of the cooling rotating ring (302) close to the cleaning rotating ring (303); a clamping slot (3032) corresponding to the clamping block (3023) is provided on the side of the cleaning rotating ring (303) close to the cooling rotating ring (302); an electromagnetic latch is provided inside the clamping slot (3032); arc-shaped air bags (3031) are provided on both sides of the cleaning rotating ring (303); an electric telescopic rod (3033) is provided between two adjacent arc-shaped air bags (3031); and the sides of the two arc-shaped air bags (3031) close to each other are fixedly connected to the two sides of the electric telescopic rod (3033).

2. The halogen-free flame-retardant and fireproof cable according to claim 1, characterized in that: The cable body (1) comprises a wire core and a first fiber layer (105), the wire cores are provided with five, the five wire cores have the same structure, the wire cores comprise a conductor (101), a fireproof layer (102) is provided on the outer side of the conductor (101), an insulating layer (103) is provided on the outer side of the fireproof layer (102), and the five wire cores comprise three power wire cores, one neutral wire core, and one ground wire core; The gap between the wire core and the first fiber layer (105) is filled with a flame retardant layer (104); a copper tube layer (106) is provided on the outside of the first fiber layer (105); a second fiber layer (107) is provided on the outside of the copper tube layer (106); a protective layer (108) is provided on the outside of the second fiber layer (107); a third fiber layer (109) is provided on the outside of the protective layer (108); an outer sheath (110) is provided on the outside of the third fiber layer (109); a temperature detector is provided on the outside of the outer sheath (110); the temperature detector is a linear temperature detector (111); and a temperature detection wire of the linear temperature detector (111) is spirally wound around the circumference of the outer sheath (110).

3. The halogen-free flame-retardant and fireproof cable according to claim 2, characterized in that: The conductor (101) is a soft copper conductor, the fireproof layer (102) is an inorganic mineral fireproof layer, the insulating layer (103) is a ceramic polyolefin insulating layer, the first fiber layer (105), the second fiber layer (107) and the third fiber layer (109) are all alkali-free glass fiber tape layers, the flame retardant layer (104) is a highly flame retardant inorganic filling rope, the copper tube layer (106) is a corrugated copper tube layer, the protective layer (108) is a ceramic polyolefin sheath, and the outer sheath (110) is a low-smoke halogen-free flame retardant polyolefin sheath.

4. The halogen-free flame-retardant and fireproof cable according to claim 1, characterized in that: The fixed joint (201) is provided with a fixing mechanism for the connecting end (202); the two ends of the limiting frame (2012) are provided on the fixed joint (201) and the connecting end (202); the limiting frame (2012) comprises a fixing plate (20121) and a limiting shaft (20122); the fixed joint (201) and the connecting end (202) are both fixedly connected to the limiting shaft (20122) via the fixing plate (20121); the limiting slide seat (301) is provided with a limiting hole corresponding to the limiting shaft (20122); the sides of the fixed joint (201) and the connecting end (202) close to each other are respectively provided with an electromagnet (2011); and the side of the cooling swivel (302) close to the fixed joint (201) is provided with a magnetic adsorption block.

5. The halogen-free flame-retardant and fireproof cable according to claim 1, characterized in that: A tooth groove (3011) is provided inside the limit slide seat (301), a ring groove (3013) is provided at the bottom of the tooth groove (3011), a gear (3012) is rotatably connected inside the tooth groove (3011), the gear (3012) is driven by a motor, a gear ring (3021) is movably connected inside the ring groove (3013), a rack on the outside of the gear ring (3021) is meshedly connected to the gear (3012), and the inside of the gear ring (3021) is fixedly connected to the outside of the cooling rotating ring (302).

6. The halogen-free flame-retardant fireproof cable according to claim 1, characterized in that: A plurality of the fan blades (3022) are provided, and the plurality of the fan blades (3022) are distributed in an array with the center point of the cooling rotating ring (302) as the center of a circle, and one end of the fan blade (3022) away from the cable body (1) passes through the cooling rotating ring (302).

7. The halogen-free flame-retardant and fireproof cable according to claim 1, characterized in that: A plurality of cleaning rotating rings (303) are provided, a clamping block (3023) is provided on one side of the cleaning rotating ring (303) away from the clamping groove (3032), and a scraping pad layer (30311) is provided on the inner side of the arc-shaped air bag (3031).

8. The halogen-free flame-retardant and fireproof cable according to claim 1, characterized in that: A contraction space for the movable end of the electric telescopic rod (3033) is reserved on the fixed end of the electric telescopic rod (3033); the connection material of the arc-shaped airbag (3031) close to the electric telescopic rod (3033) is not affected by thermal expansion and contraction; and a tension sensor and a pressure sensor are provided on the telescopic end of the electric telescopic rod (3033).

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