A flame retardant shielded rubber sheathed flexible cable

Abstract

The present invention discloses a flame-retardant shielded rubber-sheathed flexible cable, which relates to the technical field of cables. The outer sheath comprises a plurality of conductors installed at equal angles in the inner part thereof along a circumferential direction, an insulating sheath is sleeved on the outer side of the conductor, a shielding net is embedded and sleeved on the outer curved surface of the insulating sheath, and limiting convex rings are evenly and equidistantly installed at positions outside the shielding net inside the outer sheath, and a plurality of conversion cavities are opened at equal angles in the inner part of the limiting convex ring along the circumferential direction. The present invention can prevent the conductor from being directly subjected to hard pulling and impact of external forces, compensate for the error in length requirement caused by displacement, and give the conductor ductility so that it can adapt to frequent displacement actions during the operation of mobile equipment, perform traction conversion on external forces, give the cable the ability of active convection heat dissipation, enhance the heat dissipation efficiency of the cable, enable the cable to work more efficiently and stably, and equivalently improve the effective service life of the cable.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to a flame-retardant shielded rubber-sheathed flexible cable. Background Art

[0002] Rubber-sheathed cables are divided into heavy-duty rubber-sheathed flexible cables, medium-duty rubber-sheathed flexible cables, and light-duty rubber-sheathed flexible cables. Flame-retardant shielded rubber-sheathed flexible cables are rubber-sheathed flexible cables that combine flame-retardant properties with electromagnetic shielding. They are specially designed for coal mines, mining, and mobile equipment. They are flame-retardant, anti-interference, and resistant to mechanical wear, making them a core cable type for high-risk, high-interference scenarios such as mines, oil fields, and mobile equipment.

[0003] However, the rubber-sheathed flexible cables currently on the market cannot effectively meet the heat dissipation requirements during power transmission and the frequent displacement requirements of mobile devices. Cable strength is usually improved by simply piling up protective materials, which not only results in low heat dissipation efficiency, but also makes the conductor easily damaged or even broken by external forces during the displacement of mobile devices, resulting in unstable power transmission and frequent failures. Summary of the Invention

[0004] The present invention provides a flame-retardant shielded rubber-sheathed flexible cable, which can effectively solve the problem raised in the above-mentioned background technology that the rubber-sheathed flexible cables currently on the market are unable to effectively meet the heat dissipation requirements during the power transmission process and the frequent displacement requirements of mobile devices. The cable strength is usually improved by simply stacking protective materials, which not only results in low heat dissipation efficiency, but also makes the conductor easily damaged or even broken due to external force during the displacement of the mobile device, thereby causing unstable power transmission work and frequent failures.

[0005] To achieve the above object, the present invention provides the following technical solution: a flame-retardant shielded rubber-sheathed flexible cable, comprising an outer sheath, characterized in that a shielding net is provided inside the outer sheath, and a fusion reinforcement mechanism is installed inside the outer sheath at a position outside the shielding net;

[0006] The fusion reinforcement mechanism includes a limiting convex ring;

[0007] A limiting convex ring is evenly and equidistantly installed inside the outer sheath at a position outside the shielding net, a plurality of conversion cavities are opened inside the limiting convex ring, an arc-shaped plate is symmetrically and slidably installed inside the conversion cavity, a sliding rod is installed in the middle of the side end surface of the arc-shaped plate, a hollow rib is installed at the end of the sliding rod, a connecting hole is opened in the middle of the side end surface of the sliding rod, and a limiting head is sleeved on the outer curved surface of the hollow rib;

[0008] An air intake valve is embedded in the outer curved surface of the conversion cavity, an inner arc airbag is installed on the inner side of the limiting convex ring, and an air blowing valve is embedded in the outer curved surface of the inner arc airbag;

[0009] Annular grooves are provided at both sides of the outer sheath, and an inner through-tube is inserted through the middle of the side end surface of the outer sheath.

[0010] According to the above technical solution, a plurality of conductors are installed inside the outer sheath, an insulating sleeve is sleeved on the outer side of the conductor, and a shielding net is embedded and sleeved on the outer curved surface of the insulating sleeve;

[0011] A protective ring is embedded and installed on the outer side of the annular groove, and a plurality of air guide nozzles are embedded and installed on the outer curved surface of the protective ring at equal angles in the circumferential direction. An outer through ring is installed at the position of the annular groove on one side of the limiting convex ring, and an air delivery pipe is installed on the end surface of the inner arc airbag at the position on the other side of the limiting convex ring on one side. A straight pipe is installed on the inner curved surface of the outer through ring, and a plurality of exhaust pipes are installed on the outer curved surface of the outer through ring at equal angles in the circumferential direction.

[0012] A guide tube is installed at the end of the intake valve, a drainage tube is installed in the middle of the outer curved surface of the guide tube, a hollow ring is installed at the end of the drainage tube, and several axial tubes are installed at equal angles in the middle of the side end surface of the hollow ring along the circumferential direction.

[0013] According to the above technical solution, the hollow rib is an elastic member, and the original shape of the hollow rib is a concave arc. The limit head is clamped on the outside of the conductor, and the conductor is distributed in a wave shape along the axial direction.

[0014] According to the above technical solution, the gap between the two arc plates inside the conversion chamber is connected to the conducting tube through the air intake valve, the gap between the two arc plates inside the conversion chamber is connected to the inner arc airbag through the air blowing valve, and the gap between the two arc plates inside the conversion chamber is connected to the hollow rib through the connecting hole.

[0015] According to the above technical solution, the exhaust pipe and the axial tube are both distributed adjacent to the air guide nozzle, and the exhaust pipe and the axial tube are both connected to the annular groove. The exhaust pipe and the axial tube are not connected to the same annular groove, and the annular groove connected to the exhaust pipe and the annular groove connected to the axial tube are distributed adjacent to each other, and the inside of the annular groove is filled with activated carbon.

[0016] According to the above technical solution, several inner partitions are evenly and equidistantly installed inside the inner tube, and the spacing between the inner partitions is the same as that of the limiting convex ring. The two ends of the space between the inner partitions inside the inner tube are respectively connected to the gas pipe and the straight pipe.

[0017] According to the above technical solution, a synchronous protection mechanism is installed on the outside of the inner through pipe, and the synchronous protection mechanism includes an outer spacer ring;

[0018] The outer curved surface of the inner tube is evenly and evenly mounted with a plurality of outer spacer rings, the outer curved surface of the outer spacer ring is mounted with an outer sleeve, the side end surface of the outer spacer ring is provided with a plurality of serial openings at equal angles in the circumferential direction, a cylindrical bag cushion is sleeved on the outer side of the outer spacer ring, a plurality of arc holes are provided at equal angles in the circumferential direction on one side of the outer curved surface of the cylindrical bag cushion, a plurality of communication openings are provided at equal angles in the circumferential direction on the other side end surface of the cylindrical bag cushion, a waist bag is mounted on the end of the cylindrical bag cushion, and a plurality of guide holes are provided at equal angles in the circumferential direction at the middle position of the waist bag on the outer curved surface of the outer sleeve;

[0019] An outer card bag is installed on the outside of the cylindrical bag cushion, and isolation seats are installed on both sides of the outer card bag. Several exhaust valves are embedded and installed at equal angles on the end surface of one side of the outer card bag along the circumferential direction. A connecting groove is opened at the middle position of the outer curved surface of the outer sleeve corresponding to the cylindrical bag cushion. An annular bag sheet is installed inside the cylindrical bag cushion, and the annular bag sheet divides the inner cavity of the cylindrical bag cushion into an outer through cavity and an inner return cavity. A return pipe is installed at the position of the arc hole on one side of the outer curved surface of the annular bag sheet, and an air intake valve is installed at the end of the return pipe;

[0020] The outer side of the insulating sleeve is sleeved with an inner sleeve, the side end surface of the limit head is embedded with a corrugated ring at the position corresponding to the inner sleeve, and the inner arc surface of the limit head is located at the outer side of the hollow rib and is embedded with a plurality of rolling balls at equal angles along the circumferential direction.

[0021] According to the above technical solution, the corrugated collar fits with the inner sheath, the ball fits with the hollow rib, and the hollow rib is connected to the inner sheath through the limit head and the corrugated collar, and the conductor and the hollow rib both pass through the gap between the outer card bag and the waist bag.

[0022] According to the above technical solution, the cylindrical bag pad and the waist bag are connected end to end, the waist bag has an hourglass shape, the external communication cavity is located outside the internal return cavity, and the annular bag piece is located between the communication port and the communication groove, and the gap inside the outer sheath outside the inner sheath, as well as the outer sleeve, the cylindrical bag pad, the waist bag and the outer card bag are all filled with sulfur hexafluoride gas.

[0023] According to the above technical solution, the exhaust valve and the arc hole are both connected to the gap inside the outer sheath located outside the inner sheath, the inner return cavity is connected to the other side of the inner cavity of the outer card bag through the reflux pipe and the air intake valve, the connecting port and the guide hole are both connected to the waist bag, and the connecting groove is connected to the inner return cavity.

[0024] Compared with the prior art, the present invention has the following beneficial effects: the structure of the present invention is scientific and reasonable, and the use is safe and convenient;

[0025] 1. A fusion reinforcement mechanism is provided. By cooperating with the limiting convex ring, the conversion cavity, the arc plate, the sliding rod, the hollow rib and the limiting head, an interference force conversion and fusion structure can be formed. In addition, the flow limiting and guiding function of the suction valve and the blowing valve can convert the external force into traction, realize the dispersed conduction and recycling of the interference force, and on the one hand, give the cable the ability of active convection heat dissipation, transform the harmful force into the driving force of the airflow, actively extract the external cold air for dynamic heat dissipation, effectively enhance the heat dissipation efficiency of the cable, make the cable work more efficiently and stably, enhance the endurance effect and the balance of power transmission, and promote the thermal balance of various parts of the cable, avoid local overheating of the cable and excessive aging, and equivalently extend the effective service life of the cable;

[0026] On the other hand, it can prevent the conductor from being directly pulled and impacted by external forces, compensate for the error in length requirement caused by displacement during the operation of mobile equipment, and can give the conductor ductility in a variable phase, so that it can adapt to the frequent displacement movements of mobile equipment during operation, thereby improving the compatibility and stability of the cable. It can also synchronously diffuse and transmit the impact force received during operation along the radial direction of the cable, transform the interference stress into airflow pressure, and disperse and release it to the outside world, effectively avoiding the concentration of force and causing local damage to the cable. While improving the heat dissipation efficiency of the cable, it also greatly improves the tensile strength of the cable. Through the coordination of connecting holes, air guide nozzles, inner arc air bags, inner through pipes, outer through rings, air pipes, straight pipes, exhaust pipes, guide tubes, drainage pipes, hollow rings and axial tubes, the airflow and disturbance force can be guided, and the stability of heat dissipation and force unloading and buffering work can be simultaneously improved. In addition, the protective function of the annular groove, protective ring and inner partition can greatly improve the reliability and stability of the cable during operation.

[0027] 2. A synchronous protection mechanism is provided. By cooperating with the outer spacer ring, outer sleeve, cylindrical bag pad, waist bag, outer card bag and isolation seat, a cable matrix protection structure can be constructed. The external force during the cable operation process can be further transformed and utilized, and the directional circulation of sulfur hexafluoride gas is promoted, and static protection is transformed into dynamic protection. On the one hand, it can more directly absorb the heat emitted by the conductor, and can make full use of the high specific heat capacity characteristics of sulfur hexafluoride gas. In conjunction with the fusion reinforcement mechanism, the heat is transferred to the external airflow, giving full play to the convection heat dissipation advantage of sulfur hexafluoride gas, promoting its rapid heat dissipation, further enhancing the heat dissipation efficiency of the cable, forming a dual heat dissipation mechanism, greatly enhancing the thermal stability of the cable, avoiding cable failure or even spontaneous combustion due to temperature imbalance, and actively cutting off the surrounding oxygen in the event of an accidental fire to prevent the spread of fire, thereby improving the timeliness and effectiveness of flame retardant work;

[0028] On the other hand, the connectivity of the series ports can be utilized to promote the pressure balance of sulfur hexafluoride gas at various locations inside the outer sheath, ensure the insulation shielding effect of sulfur hexafluoride gas, constitute a dual protection mechanism of gas insulation shielding, and further transmit and guide the external force, promote the external disturbance force to be transmitted and dispersed along the circumference of the cable, cooperate with the fusion reinforcement mechanism to form a dual force unloading protection mechanism, greatly enhance the compressive strength of the cable, and cooperate with the corrugated ring, ball and inner sheath to further transform the disturbance force of the cable to avoid the dislocation of the conductor under the action of external force, which can effectively enhance the density and stability of the various structures inside the cable. Through the cooperation of the exhaust valve, arc hole, connecting port, guide hole, series port, connecting groove, annular capsule, external cavity, internal return cavity, reflux pipe and intake valve, the sulfur hexafluoride gas can be directed and guided, which greatly improves the flow smoothness and stability of the sulfur hexafluoride gas and ensures the reliability of heat dissipation and pressure relief buffering.

[0029] In summary, this cable can perform multiple transformations and utilizations on external disturbance forces, turning the adverse factors of external disturbance forces into favorable factors for heat dissipation and pressure resistance, effectively integrating the heat dissipation mechanism and the pressure unloading mechanism, giving the cable the ability of active convection heat dissipation while giving the conductor ductility, so that the cable can adapt to the frequent displacement requirements of mobile devices, greatly improving the cable strength, and realizing double shielding protection for cable transmission work, realizing the rapid dispersion and release of disturbance pressure, and improving the reliability of flame retardant work. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0031] In the attached figure:

[0032] Figure 1 It is a structural schematic diagram of the present invention;

[0033] Figure 2 This is a schematic diagram of the outer through ring installation structure of the present invention;

[0034] Figure 3 This is a schematic diagram of the external card bag installation structure of the present invention;

[0035] Figure 4 This is a schematic diagram of the internal pipe installation structure of the present invention;

[0036] Figure 5 It is a schematic diagram of the structure of the fusion reinforcement mechanism of the present invention;

[0037] Figure 6 This is a schematic diagram of the inner arc airbag installation structure of the present invention;

[0038] Figure 7It is a structural schematic diagram of the synchronous protection mechanism of the present invention;

[0039] Figure 8 This is a schematic diagram of the waist bag installation structure of the present invention;

[0040] Figure 9 This is a schematic diagram of the corrugated collar installation structure of the present invention;

[0041] Numbers in the figure: 1, outer sheath; 11, conductor; 12, insulation sleeve; 13, shielding mesh;

[0042] 200, fusion reinforcement mechanism; 201, limiting convex ring; 202, conversion chamber; 203, arc plate; 204, sliding rod; 205, hollow rib; 206, communicating hole; 207, limiting head; 208, suction valve; 209, blowing valve; 210, inner arc airbag; 211, annular groove; 212, protective ring; 213, air guide nozzle; 214, inner through pipe; 215, outer through ring; 216, air delivery pipe; 217, straight pipe; 218, exhaust pipe; 219, guide tube; 220, drainage pipe; 221, hollow ring; 222, axial pipe; 223, inner partition;

[0043] 300. Synchronous protection mechanism; 301. Outer spacer ring; 302. Outer sleeve; 303. Cylindrical bag cushion; 304. Waist bag; 305. Outer card bag; 306. Isolation seat; 307. Exhaust valve; 308. Arc hole; 309. Communication port; 310. Guide hole; 311. Series port; 312. Communication groove; 313. Annular bag piece; 314. External communication cavity; 315. Internal return cavity; 316. Return pipe; 317. Inlet valve; 318. Corrugated collar; 319. Ball; 320. Inner sheath. DETAILED DESCRIPTION

[0044] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0045] Example: Figure 1-9 As shown, the present invention provides a technical solution, a flame-retardant shielded rubber sheathed flexible cable, comprising an outer sheath 1, wherein a plurality of conductors 11 are installed at equal angles along the circumferential direction inside the outer sheath 1, an insulating sheath 12 is sleeved on the outer side of the conductor 11, a shielding net 13 is embedded and sleeved on the outer curved surface of the insulating sheath 12, and a fusion reinforcement mechanism 200 is installed inside the outer sheath 1 at a position outside the shielding net 13;

[0046] The fusion reinforcement mechanism 200 includes a limiting convex ring 201;

[0047] A limiting convex ring 201 is evenly and equidistantly installed inside the outer sheath 1 at a position outside the shielding net 13. A number of conversion cavities 202 are opened at equal angles along the circumferential direction inside the limiting convex ring 201. An arc-shaped plate 203 is symmetrically and slidably installed inside the conversion cavity 202. A sliding rod 204 is installed in the middle of the side end surface of the arc-shaped plate 203. A hollow rib 205 is installed at the end of the sliding rod 204. A connecting hole 206 is opened in the middle of the side end surface of the sliding rod 204. A limiting head 207 is slidably sleeved in the middle of the outer curved surface of the hollow rib 205. The hollow rib 205 is an elastic member, and the original shape of the hollow rib 205 is a concave arc. The limiting head 207 is clamped on the outside of the conductor 11, and the conductor 11 is distributed in a wave shape along the axial direction to improve the tensile strength.

[0048] An air intake valve 208 is embedded and installed on the outer curved surface of the conversion chamber 202 at both sides of the arc plate 203, an inner arc air bag 210 is installed on the inner side of the limiting convex ring 201, and an air blowing valve 209 is embedded and installed at the position of the outer curved surface of the inner arc air bag 210 corresponding to the air intake valve 208. An annular groove 211 is provided on both sides of the outer sheath 1 at the position of the limiting convex ring 201, and an inner through pipe 214 is inserted in the middle of the side end face of the outer sheath 1.

[0049] A protective ring 212 is embedded and installed on the outside of the annular groove 211. Several air guide nozzles 213 are embedded and installed on the outer curved surface of the protective ring 212 at equal angles in the circumferential direction. An outer through ring 215 is installed at the position of the annular groove 211 on one side of the limiting convex ring 201. An air pipe 216 is installed on the end surface of the inner arc airbag 210 at the other side of the limiting convex ring 201 on one side. A straight pipe 217 is installed on the inner curved surface of the outer through ring 215. Several inner baffles 223 are evenly installed inside the inner through pipe 214 at equal intervals. The spacing between the inner baffles 223 is the same as that of the limiting convex ring 201. The two ends of the space between the inner baffles 223 inside the inner through pipe 214 are respectively connected to the air pipe 216 and the straight pipe 217 to improve the heat exchange effect. Several exhaust pipes 218 are installed on the outer curved surface of the outer through ring 215 at equal angles in the circumferential direction.

[0050] A guide tube 219 is installed at the end of the suction valve 208. The gap between the two curved plates 203 inside the conversion chamber 202 is connected to the guide tube 219 through the suction valve 208. The gap between the two curved plates 203 inside the conversion chamber 202 is connected to the inner arc airbag 210 through the blowing valve 209. The gap between the two curved plates 203 inside the conversion chamber 202 is connected to the hollow rib 205 through the connecting hole 206 to limit and guide the airflow. A drainage tube 220 is installed in the middle of the outer curved surface of the guide tube 219, and a hollow ring 221 is installed at the end of the drainage tube 220.

[0051] A number of axial tubes 222 are installed at equal angles along the circumferential direction in the middle of the side end surface of the hollow ring 221. The exhaust pipe 218 and the axial tube 222 are adjacent to the air guide nozzle 213. The exhaust pipe 218 and the axial tube 222 are both connected to the annular groove 211. The exhaust pipe 218 and the axial tube 222 are not connected to the same annular groove 211, and the annular groove 211 connected to the exhaust pipe 218 and the annular groove 211 connected to the axial tube 222 are adjacent to each other. The inside of the annular groove 211 is filled with activated carbon to improve the stability of the airflow.

[0052] A synchronous protection mechanism 300 is installed on the outside of the inner through pipe 214, and the synchronous protection mechanism 300 includes an outer spacer ring 301;

[0053] Several outer spacer rings 301 are evenly and evenly mounted on the outer curved surface of the inner tube 214. An outer sleeve 302 is mounted on the outer curved surface of the outer spacer ring 301. Several serial ports 311 are formed at equal angles along the circumferential direction on the side end surface of the outer spacer ring 301. A cylindrical bladder 303 is sleeved on the outside of the outer spacer ring 301. Several arcuate holes 308 are formed at equal angles along the circumferential direction on one side of the outer curved surface of the cylindrical bladder 303. Several connecting ports 309 are formed at equal angles along the circumferential direction on the other side end surface of the cylindrical bladder 303. A waist bladder 304 is mounted on the end of the cylindrical bladder 303. Several guide holes 310 are formed at equal angles along the circumferential direction on the outer curved surface of the outer sleeve 302 at the middle position corresponding to the waist bladder 304.

[0054] An outer card bag 305 is installed on the outside of the cylindrical bag cushion 303, and isolation seats 306 are installed on both sides of the outer card bag 305. Several exhaust valves 307 are embedded and installed at equal angles along the circumferential direction on the end surface of one side of the outer card bag 305. A connecting groove 312 is opened at the middle position of the cylindrical bag cushion 303 on the outer curved surface of the outer sleeve 302. An annular bag piece 313 is installed inside the cylindrical bag cushion 303, and the annular bag piece 313 divides the inner cavity of the cylindrical bag cushion 303 into an outer through cavity 314 and an inner return cavity 315. A return pipe 316 is installed on one side of the outer curved surface of the annular bag piece 313 at the position corresponding to the arc hole 308, and an air intake valve 317 is installed at the end of the return pipe 316.

[0055] The outer side of the insulating sleeve 12 is sleeved with an inner sheath 320, the corrugated collar 318 is matched with the inner sheath 320, the ball 319 is matched with the hollow rib 205, and the hollow rib 205 is connected to the inner sheath 320 through the limit head 207 and the corrugated collar 318. The conductor 11 and the hollow rib 205 pass through the gap between the outer card bag 305 and the waist bag 304 to provide double-layer shielding protection. The cylindrical bag pad 303 and the waist bag 304 are connected end to end. The waist bag 304 has an hourglass shape. The outer through cavity 314 is located outside the inner return cavity 315, and the annular bag piece 313 is located between the communication port 309 and the communication groove 312. The gap inside the outer sheath 1 outside the inner sheath 320 and the outer sleeve 302, the cylindrical bag pad 303, the waist bag 304 and the outer card bag 305 are filled with sulfur hexafluoride gas to improve the stability of the cable structure and improve the working reliability.

[0056] A corrugated collar 318 is embedded in the side end surface of the limit head 207 at the position corresponding to the inner sheath 320. The exhaust valve 307 and the arc hole 308 are both connected to the gap inside the outer sheath 1 located outside the inner sheath 320. The inner return cavity 315 is connected to the other side of the inner cavity of the outer card bag 305 through the return pipe 316 and the air intake valve 317. The connecting port 309 and the guide hole 310 are both connected to the waist bag 304, and the connecting groove 312 is connected to the inner return cavity 315 to further improve the heat dissipation efficiency and compressive strength of the cable. The inner arc surface of the limit head 207 is located on the outside of the hollow rib 205, and a number of balls 319 are embedded and rolled at equal angles along the circumferential direction.

[0057] The working principle and usage process of the present invention: In the application process of this flame-retardant shielded rubber-sheathed flexible cable, the specific parameters such as the transmission capacity and length of the cable should be selected and determined according to the actual use requirements, that is, according to the actual use scenario, specific purpose and load requirements. Here, the transmission of power to mobile equipment in coal mines is taken as an example;

[0058] First, based on the power load requirements of the mobile device, select a cable with a transmission capacity that matches it, and determine the cable length based on the mobile device's displacement requirements. Without affecting the normal operation of the mobile device, the cable length should be minimized to save cable and reduce costs. This also prevents excessive cable length from causing entanglement and curling during the movement of the mobile device. After selecting the cable specifications, connect the conductor 11 to the mobile device and the relevant external energy supply device accordingly, and then put it into normal use.

[0059] During the use of the cable, in the initial state, under the elastic support of the hollow ribs 205 and the limiting snap action of the limit head 207, the corrugated collar 318 and the inner sheath 320, the conductor 11 is distributed in a wavy shape in the radial direction inside the outer sheath 1. As the mobile device moves, the cable will be pulled by the corresponding external force. At this time, under the action of the external pulling force, the hollow ribs 205 will deform accordingly and, under the action of different external pulling forces and their own elastic force, undergo a reciprocating transition from an inwardly concave arc state to a straight state to varying degrees.

[0060] As the hollow rib 205 reciprocates, the conductor 11 moves accordingly with the hollow rib 205 under the action of the limiting buckles of the limiting head 207, the corrugated collar 318, and the inner sheath 320, and undergoes varying degrees of reciprocating transitions between the wavy and straight shapes. This protects the conductor 11 from direct external pulling and impact, compensates for errors in the required cable length caused by displacement during the operation of the mobile device, and allows the conductor 11 to be flexibly adapted to the frequent displacements of the mobile device during operation.

[0061] At the same time, during the reciprocating deformation process of the hollow rib 205, it also pushes and pulls the sliding rods 204 at both ends, forcing the curved plate 203 to move back and forth inside the conversion chamber 202 under the drive of the sliding rods 204. As a result, the size of the space on both sides of the curved plate 203 inside the conversion chamber 202 changes back and forth, further forming a negative pressure at the suction valve 208 and a positive pressure at the blowing valve 209.

[0062] Subsequently, during the reciprocating movement of the curved plate 203, under the action of negative pressure, external air passes through the air guide nozzle 213 and enters the annular groove 211. After being filtered and dehumidified by the activated carbon, it is sucked into the hollow ring 221 through the axial tube 222. After secondary diversion by the hollow ring 221, it flows into each guide tube 219 through the drainage duct 220 and is sucked into each conversion chamber 202 under the flow-limiting and guiding action of the suction valve 208. Subsequently, during the reciprocating movement of the curved plate 203, under the flow-limiting and guiding action of the suction valve 208, it is pressed into the inner arc airbag 210.

[0063] During this process, the inner arc airbag 210 expands accordingly with the support of the airflow, squeezing the outer inner sheath 320, making the conductors 11 more stable and preventing the conductors 11 from being displaced in the circumferential direction under the action of external forces, thereby ensuring transmission stability. At the same time, the air flowing in from the outside absorbs the heat dissipated by the conductors 11 during operation. The air then flows through the air delivery pipe 216 into the inner through-tube 214 and flows along the inner through-tube 214 to the straight pipe 217 connected thereto, further absorbing the heat dissipated by the conductors 11 inside the outer sheath 1 during operation.

[0064] The airflow then flows through the straight pipe 217 into the outer through-ring 215 and, under the guidance of the exhaust pipe 218, flows through the exhaust pipe 218 into the annular groove 211 connected thereto. After being filtered and purified, it is discharged into the outside air through the air guide nozzle 213. During the operation of the mobile device, as the mobile device moves and pulls, several relatively independent internal and external ventilation cycles are formed between each two adjacent connecting grooves 312. Under the communication function of the hollow ribs 205 and the connecting holes 206, the relatively independent internal and external ventilation cycles are connected in series.

[0065] Therefore, during the operation of the mobile device, the displacement pulling force of the external mobile device during operation is used to promote the external airflow to flow inside and outside the outer sheath 1. While promoting the rapid discharge of heat emitted by the conductor 11 during operation, the displacement pulling force can be fully transferred, converted, and buffered and diluted. During the airflow process, the external pulling force is dispersed and diluted in the radial direction and converted into airflow pressure, which is released to the outside world with the flow of the airflow. Similarly, when the cable is subjected to other external impact pulling forces, they can also be converted, utilized, and buffered and released as the hollow ribs 205 deform, thereby preventing the cable from being subjected to excessive impact forces locally.

[0066] Similarly, during the use of the cable, when the hollow rib 205 is pulled by an external force and the conductor 11 is driven to move back and forth accordingly under the action of the limiting buckle of the limiting head 207, the corrugated collar 318 and the inner sheath 320, the inner arc surface of the outer card bag 305 is also squeezed and deformed accordingly, causing the air pressure inside it to fluctuate back and forth accordingly;

[0067] Then, under the flow-limiting guidance of the exhaust valve 307, when the outer card bag 305 is compressed and deformed, the sulfur hexafluoride gas inside it will flow through the exhaust valve 307 under the action of the air pressure into the gap inside the outer sheath 1 located outside the inner sheath 320, and then pass through the corresponding arc-shaped hole 308 to enter the outer through cavity 314. Under the guidance of the cylindrical bag pad 303, it will flow into the waist bag 304 through the communication port 309, then flow along the inner cavity of the waist bag 304, enter the outer sleeve 302 through the guide hole 310, and then flow back along the outer sleeve 302 in the opposite direction to the flow inside the inner through tube 214, and then enter the inner return cavity 315 through the communication groove 312.

[0068] Finally, under the guidance of the return pipe 316 and the intake valve 317, the outer card bag 305 is re-drawn into the outer card bag 305 during its elastic reset process, thereby promoting the complete circulation of the sulfur hexafluoride gas. During this process, the sulfur hexafluoride gas will more directly absorb the heat emitted by the conductor 11, making full use of its high specific heat capacity. During its reverse reflux process in the outer sleeve 302, the sulfur hexafluoride gas transfers the heat to the external inhaled air flow, giving full play to the convection heat dissipation advantage of the sulfur hexafluoride gas and promoting its rapid heat dissipation.

[0069] During the circulation of the sulfur hexafluoride gas, as it flows through the waist bag 304, it forces the waist bag 304 to transform from a concave state to a flat state. The transformation varies in amplitude depending on the airflow pressure, that is, the magnitude of the external force. This can further buffer and dilute the external force, not only further directional pulling of the sulfur hexafluoride gas, but also cooperate with the cylindrical bag pad 303 and the external clamping bag 305 to further limit and lock the conductor 11 with the help of external pressure, thereby ensuring the stability of the internal structure of the cable.

[0070] At the same time, the external impact force can be further transmitted along the circumference of the cable, and the external force can be double-buffered and balanced. In addition, the connectivity of the series port 311 can promote the pressure balance of the sulfur hexafluoride gas at various locations inside the outer sheath 1, ensure the insulation shielding effect of the sulfur hexafluoride gas, and form a dual protection mechanism of gas insulation shielding. The stability of the sulfur hexafluoride gas can be further utilized. When the cable accidentally catches fire, the surrounding oxygen can be isolated, the fire can be prevented from spreading, and rapid flame retardancy can be achieved.

[0071] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A flame retardant shielded rubber sheathed flexible cable, comprising an outer sheath (1), characterized in that: A plurality of conductors (11) are installed at equal angles along the circumferential direction inside the outer sheath (1); an insulating sleeve (12) is sleeved on the outside of the conductor (11); a shielding net (13) is embedded and sleeved on the outer curved surface of the insulating sleeve (12); and a fusion reinforcement mechanism (200) is installed inside the outer sheath (1) at a position outside the shielding net (13); The fusion reinforcement mechanism (200) comprises a limiting convex ring (201); A limiting convex ring (201) is evenly and equidistantly installed inside the outer sheath (1) at a position outside the shielding net (13), a plurality of conversion cavities (202) are opened at equal angles along the circumferential direction inside the limiting convex ring (201), an arc-shaped plate (203) is symmetrically and slidably installed inside the conversion cavity (202), a sliding rod (204) is installed in the middle of the side end face of the arc-shaped plate (203), a hollow rib (205) is installed at the end of the sliding rod (204), a connecting hole (206) is opened in the middle of the side end face of the sliding rod (204), and a limiting head (207) is slidably sleeved in the middle of the outer curved surface of the hollow rib (205); The outer curved surface of the conversion chamber (202) is embedded with an air intake valve (208) at positions on both sides of the arc plate (203); an inner arc air bag (210) is installed on the inner side of the limiting convex ring (201); an air blow valve (209) is embedded in the outer curved surface of the inner arc air bag (210) at a position corresponding to the air intake valve (208); an annular groove (211) is formed at positions on both sides of the limiting convex ring (201); and an inner through pipe (214) is inserted into the middle of the side end surface of the outer sleeve (1); A protective ring (212) is embedded and installed on the outer side of the annular groove (211), and a plurality of air guide nozzles (213) are embedded and installed on the outer curved surface of the protective ring (212) at equal angles in the circumferential direction. An outer through ring (215) is installed at a position corresponding to the annular groove (211) on one side of the limiting convex ring (201), and an air delivery pipe (216) is installed on the side end surface of the inner arc airbag (210) at a position on the other side of the limiting convex ring (201). A straight pipe (217) is installed on the inner curved surface of the outer through ring (215), and a plurality of exhaust pipes (218) are installed on the outer curved surface of the outer through ring (215) at equal angles in the circumferential direction. A guide tube (219) is installed at the end of the air intake valve (208), a drainage tube (220) is installed in the middle of the outer curved surface of the guide tube (219), a hollow ring (221) is installed at the end of the drainage tube (220), and a plurality of axial tubes (222) are installed at equal angles along the circumferential direction in the middle of the side end surface of the hollow ring (221).

2. The flame-retardant shielded rubber-sheathed flexible cable according to claim 1, characterized in that: The hollow rib (205) is an elastic member, and the original shape of the hollow rib (205) is a concave arc. The limit head (207) is clamped on the outside of the conductor (11), and the conductor (11) is distributed in a wave shape along the axial direction.

3. The flame-retardant shielded rubber-sheathed flexible cable according to claim 1, characterized in that: The gap between the two arc-shaped plates (203) inside the conversion chamber (202) is communicated with the guide tube (219) via the air suction valve (208), the gap between the two arc-shaped plates (203) inside the conversion chamber (202) is communicated with the inner arc airbag (210) via the air blowing valve (209), and the gap between the two arc-shaped plates (203) inside the conversion chamber (202) is communicated with the hollow rib (205) via the communication hole (206).

4. The flame-retardant shielded rubber-sheathed flexible cable according to claim 1, characterized in that: The exhaust pipe (218) and the axial pipe (222) are both distributed adjacent to the air guide nozzle (213), and the exhaust pipe (218) and the axial pipe (222) are both connected to the annular groove (211). The exhaust pipe (218) and the axial pipe (222) are not connected to the same annular groove (211), and the annular groove (211) connected to the exhaust pipe (218) and the annular groove (211) connected to the axial pipe (222) are distributed adjacent to each other, and the annular groove (211) is filled with activated carbon.

5. The flame-retardant shielded rubber-sheathed flexible cable according to claim 1, characterized in that: A plurality of inner baffles (223) are evenly and equidistantly installed inside the inner tube (214), and the spacing between the inner baffles (223) is the same as that of the limiting convex ring (201). The two ends of the space between the inner baffles (223) inside the inner tube (214) are respectively connected to the gas transmission pipe (216) and the straight pipe (217).

6. The flame-retardant shielded rubber-sheathed flexible cable according to claim 1, characterized in that: A synchronous protection mechanism (300) is installed on the outside of the inner tube (214), and the synchronous protection mechanism (300) includes an outer spacer ring (301); The outer curved surface of the inner tube (214) is evenly and evenly provided with a plurality of outer spacer rings (301), the outer curved surface of the outer spacer ring (301) is provided with an outer sleeve (302), the side end surface of the outer spacer ring (301) is provided with a plurality of serial openings (311) at equal angles in the circumferential direction, the outer side of the outer spacer ring (301) is sleeved with a cylindrical capsule pad (303), the outer curved surface of the cylindrical capsule pad (303) is provided with a plurality of arc holes (308) at equal angles in the circumferential direction on one side, the side end surface of the cylindrical capsule pad (303) is provided with a plurality of connecting openings (309) at equal angles in the circumferential direction, the end of the cylindrical capsule pad (303) is provided with a waist bag (304), and the outer curved surface of the outer sleeve (302) is provided with a plurality of guide holes (310) at equal angles in the circumferential direction at the middle position corresponding to the waist bag (304); An outer card bag (305) is installed on the outside of the cylindrical bag cushion (303), and isolation seats (306) are installed on both sides of the outer card bag (305). A plurality of exhaust valves (307) are embedded and installed at equal angles along the circumferential direction on the end surface of one side of the outer card bag (305). A connecting groove (312) is opened at a position in the middle of the cylindrical bag cushion (303) on the outer curved surface of the outer sleeve (302). An annular bag sheet (313) is installed inside the cylindrical bag cushion (303), and the annular bag sheet (313) divides the inner cavity of the cylindrical bag cushion (303) into an outer through cavity (314) and an inner return cavity (315). A return pipe (316) is installed at a position corresponding to the arc hole (308) on one side of the outer curved surface of the annular bag sheet (313), and an air intake valve (317) is installed at the end of the return pipe (316); The outer side of the insulating sleeve (12) is sleeved with an inner sleeve (320), a corrugated collar (318) is embedded and installed at a position corresponding to the inner sleeve (320) on the side end surface of the limiting head (207), and a plurality of balls (319) are embedded and installed in a rolling manner at equal angles along the circumferential direction on the inner arc surface of the limiting head (207) at a position outside the hollow rib (205).

7. The flame-retardant shielded rubber-sheathed flexible cable according to claim 6, characterized in that: The corrugated collar (318) is fitted with the inner sheath (320), the ball (319) is fitted with the hollow rib (205), and the hollow rib (205) is connected to the inner sheath (320) via the limit head (207) and the corrugated collar (318), and the conductor (11) and the hollow rib (205) both pass through the gap between the outer card bag (305) and the waist bag (304).

8. The flame-retardant shielded rubber-sheathed flexible cable according to claim 6, characterized in that: The cylindrical capsule pad (303) and the waist capsule (304) are connected end to end. The waist capsule (304) has an hourglass shape. The external cavity (314) is located outside the internal cavity (315), and the annular capsule piece (313) is located between the communication port (309) and the communication groove (312). The gap inside the outer sheath (1) outside the inner sheath (320) and the interior of the outer sleeve (302), the cylindrical capsule pad (303), the waist capsule (304) and the outer card capsule (305) are all filled with sulfur hexafluoride gas.

9. The flame-retardant shielded rubber-sheathed flexible cable according to claim 6, characterized in that: The exhaust valve (307) and the arc hole (308) are both connected to the gap inside the outer sheath (1) and outside the inner sheath (320), the inner return cavity (315) is connected to the other side of the inner cavity of the outer card bag (305) through the return pipe (316) and the air inlet valve (317), the communication port (309) and the guide hole (310) are both connected to the waist bag (304), and the communication groove (312) is connected to the inner return cavity (315).

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