Flame-retardant shielding rubber jacketed flexible cable

Abstract

The invention discloses a flame-retardant shielding rubber jacketed flexible cable, and relates to the technical field of cables, the flame-retardant shielding rubber jacketed flexible cable comprises an outer sheath, a plurality of conductors are installed in the outer sheath in the circumferential direction at equal angles, the conductors are sleeved with insulating sleeves, and the outer curved surfaces of the insulating sleeves are sleeved with shielding nets in an embedded mode; limiting protruding rings are evenly installed at the positions, located on the outer side of the shielding net, in the outer sheath at equal intervals, and a plurality of conversion cavities are formed in the limiting protruding rings at equal angles in the circumferential direction. The conductor is endowed with ductility, so that the conductor can adapt to frequent displacement actions in the working process of mobile equipment, traction conversion is performed on external acting force, the cable is endowed with active convection heat dissipation capability, the heat dissipation efficiency of the cable is enhanced, the cable can work more efficiently and stably, and the effective service life of the cable is equivalently prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and specifically 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. The flame-retardant shielded rubber-sheathed flexible cable is a rubber-sheathed flexible cable that combines flame-retardant performance and electromagnetic shielding structure. It is a cable designed specifically for coal mines, mines, and mobile equipment, and has the characteristics of flame retardancy, anti-interference, and resistance to mechanical wear. It is the core cable type in high-risk and strong-interference scenarios such as mines, oil fields, and mobile equipment;

[0003] However, the rubber-sheathed flexible cables on the current market cannot effectively meet the heat dissipation requirements during the power transmission process and the frequent displacement requirements of mobile equipment. Usually, the cable strength is enhanced by simply stacking protective materials, which not only results in low heat dissipation efficiency, but also makes the conductor prone to damage or even breakage due to external pulling during the displacement of mobile equipment, resulting in unstable power transmission work 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 problems of the rubber-sheathed flexible cables on the current market, that is, they cannot effectively meet the heat dissipation requirements during the power transmission process and the frequent displacement requirements of mobile equipment. Usually, the cable strength is enhanced by simply stacking protective materials, which not only results in low heat dissipation efficiency, but also makes the conductor prone to damage or even breakage due to external pulling during the displacement of mobile equipment, resulting in 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, including an outer sheath, characterized in that: a shielding net is arranged inside the outer sheath, and a fusion strengthening mechanism is installed at a position outside the shielding net inside the outer sheath;

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

[0007] The outer sheath is equidistantly and uniformly installed with limiting convex rings at a position outside the shielding net inside. A plurality of conversion cavities are opened inside the limiting convex ring. Arc-shaped plates are symmetrically and slidably installed inside the conversion cavities. A sliding rod is installed in the middle of the side end face of the arc-shaped plate. A hollow rib is installed at the end of the sliding rod. A communication hole is opened in the middle of the side end face of the sliding rod. A limiting head is sleeved on the outer curved surface of the hollow rib;

[0008] An air intake valve is embedded on the outer curved surface of the conversion cavity. An inner arc-shaped airbag is installed inside the limiting convex ring. A blowing valve is embedded on the outer curved surface of the inner arc-shaped airbag;

[0009] Annular grooves are provided at both positions on both sides of the outer sheath, and an inner through pipe is inserted through the middle of the side end face 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 outside the conductors, 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 outside 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 along the circumferential direction. An outer through ring is installed at a position corresponding to the annular groove on one side of the limit convex ring. An air delivery pipe is installed at a position on the side end face of the inner arc airbag on the other side of one limit convex ring. 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 along the circumferential direction;

[0012] A conduction cylinder is installed at the end of the air intake valve. A drainage pipe is installed in the middle of the outer curved surface of the conduction cylinder. A hollow ring is installed at the end of the drainage pipe. A plurality of axial pipes are installed at equal angles along the circumferential direction in the middle of the side end face of the hollow ring.

[0013] According to the above technical solution, the hollow rib is an elastic member, and the original shape of the hollow rib is concave arc-shaped. The limit head is sleeved outside the conductor, and the conductors are distributed in a wavy shape along the axis.

[0014] According to the above technical solution, the gap between the two arc-shaped plates inside the conversion cavity is communicated with the conduction cylinder through the air intake valve, the gap between the two arc-shaped plates inside the conversion cavity is communicated with the inner arc airbag through the air blowing valve, and the gap between the two arc-shaped plates inside the conversion cavity is communicated with the hollow rib through the communication hole.

[0015] According to the above technical solution, the exhaust pipes and the axial pipes are both adjacent to the air guide nozzles. The exhaust pipes and the axial pipes are both communicated with the annular groove. The exhaust pipes and the axial pipes are not communicated with the same annular groove, and the annular groove communicated with the exhaust pipe and the annular groove communicated with the axial pipe are adjacent to each other. The annular groove is filled with activated carbon.

[0016] According to the above technical solution, a plurality of inner partition plates are installed at equal distances and evenly inside the inner through pipe. The distance between the inner partition plates is the same as that of the limit convex ring. The two ends of the space between the inner partition plates inside the inner through pipe are respectively communicated with the air delivery pipe and the straight pipe.

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

[0018] A number of outer spacer rings are evenly installed at equal intervals on the outer curved surface of the inner through-tube. An outer sleeve is installed on the outer curved surface of the outer spacer ring. A number of series ports are opened at equal angles along the circumferential direction on the side end surface of the outer spacer ring. A cylindrical bladder pad is sleeved outside the outer spacer ring. A number of arc-shaped holes are opened at equal angles along the circumferential direction on one side of the outer curved surface of the cylindrical bladder pad. A number of communication ports are opened at equal angles along the circumferential direction on the other side end surface of the cylindrical bladder pad. A waist bladder is installed at the end of the cylindrical bladder pad. A number of guiding holes are opened at equal angles along the circumferential direction on the outer curved surface of the outer sleeve corresponding to the middle position of the waist bladder;

[0019] An outer clamping bladder is installed outside the cylindrical bladder pad. Isolation seats are installed on both sides of the outer clamping bladder. A number of exhaust valves are embedded and installed at equal angles along the circumferential direction on one side end surface of the outer clamping bladder. A communication groove is opened on the outer curved surface of the outer sleeve corresponding to the middle position of the cylindrical bladder pad. An annular bladder piece is installed inside the cylindrical bladder pad, and the annular bladder piece divides the inner cavity of the cylindrical bladder pad into an outer through cavity and an inner return cavity. A return pipe is installed on one side of the outer curved surface of the annular bladder piece corresponding to the position of the arc-shaped hole. An intake valve is installed at the end of the return pipe;

[0020] An inner sheath is sleeved outside the insulating sleeve. A corrugated sleeve ring is embedded and installed on the side end surface of the limiting head corresponding to the position of the inner sheath. A number of rolling balls are embedded and installed at equal angles along the circumferential direction on the inner arc surface of the limiting head at the position outside the hollow rib.

[0021] According to the above technical solution, the corrugated sleeve ring fits with the inner sheath, the rolling balls fit with the hollow rib, and the hollow rib is connected to the inner sheath through the limiting head and the corrugated sleeve ring. Both the conductor and the hollow rib pass through the gap between the outer clamping bladder and the waist bladder.

[0022] According to the above technical solution, the cylindrical bladder pad and the waist bladder are connected end to end. The shape of the waist bladder is hourglass-shaped. The outer through cavity is located outside the inner return cavity, and the annular bladder piece is located between the communication port and the communication groove. Sulfur hexafluoride gas is filled in the gap inside the outer sheath outside the inner sheath and inside the outer sleeve, the cylindrical bladder pad, the waist bladder and the outer clamping bladder.

[0023] According to the above technical solution, both the exhaust valve and the arc-shaped hole are communicated with the gap inside the outer sheath outside the inner sheath. The inner return cavity is communicated with the other side of the inner cavity of the outer clamping bladder through the return pipe and the intake valve. Both the communication port and the guiding hole are communicated with the waist bladder. The communication groove is communicated with the inner return cavity.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: The structure of the present invention is scientific and reasonable, and it is safe and convenient to use;

[0025] 1. A fusion enhancement mechanism is provided. Through the cooperation of a limiting convex ring, a conversion cavity, an arc-shaped plate, a sliding rod, a hollow rib, and a limiting head, an interference force conversion and fusion structure can be formed. Coupled with the flow-limiting and guiding effects of the air intake valve and the air blowing valve, the external force can be tractionally converted, realizing the dispersed conduction and recycling of the interference force. On the one hand, it can endow the cable with the ability of active convective heat dissipation, convert harmful forces into air flow driving forces, actively extract external cold air for dynamic heat dissipation, effectively enhance the heat dissipation efficiency of the cable, enable the cable to work more efficiently and stably, enhance the endurance effect and the balance of power transmission, promote the thermal balance of each part of the cable, avoid local overheating and premature aging of the cable, and equivalently improve 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 the length requirement caused by displacement during the operation of the mobile device, and equivalently endow the conductor with ductility, enabling it to adapt to the frequent displacement actions during the operation of the mobile device, improving the compatibility and stability of the cable. It can also synchronously diffuse and transfer the impact force received during the operation along the radial direction of the cable, convert the interference stress into air flow pressure, and disperse and release it to the outside world, effectively avoiding the concentration of forces and causing local damage to the cable. While improving the heat dissipation efficiency of the cable, it greatly enhances the tensile strength of the cable. Through the cooperation of a communication hole, a gas guide nozzle, an inner arc airbag, an inner through pipe, an outer through ring, an air delivery pipe, a straight pipe, an exhaust pipe, a conduction cylinder, a drainage pipe, a hollow ring, and an axial pipe, the air flow and the interference force can be guided, synchronously improving the stability of heat dissipation and force unloading and buffering work. Coupled with the protective effects of the annular groove, the protective ring, and the inner partition, the reliability and stability of the cable during operation can be greatly improved.

[0027] 2. A synchronous protection mechanism is provided. Through the cooperation of an outer isolation ring, an outer sleeve, a cylindrical cushion, a waist-shaped airbag, an outer clamping airbag, and an isolation seat, a cable matrix protection structure can be constructed, which can further convert and utilize the external force during the operation of the cable, promote the directional circulation of sulfur hexafluoride gas, and convert static protection into dynamic protection. On the one hand, it can more directly absorb the heat dissipated by the conductor, make full use of the high specific heat capacity characteristic of sulfur hexafluoride gas, cooperate with the fusion enhancement mechanism, transfer the heat to the externally inhaled air flow, give full play to the convective heat dissipation advantage of sulfur hexafluoride gas, promote its rapid heat dissipation, further enhance the heat dissipation efficiency of the cable, form a double heat dissipation mechanism, greatly enhance the thermal stability of the cable during operation, avoid cable failures or even spontaneous combustion due to temperature imbalance, and can actively cut off the surrounding oxygen in case of accidental fire, preventing the spread of fire and improving the timeliness and effectiveness of flame retardant work.

[0028] On the other hand, the connection function of the series port can be utilized to promote the air pressure balance of sulfur hexafluoride gas at various parts inside the outer sheath, ensure the insulation shielding effect of sulfur hexafluoride gas, constitute a dual protection mechanism for gas insulation shielding, and further transmit and guide external forces, so that external disturbing forces are transmitted and dispersed along the circumferential direction of the cable. In cooperation with the fusion strengthening mechanism, a dual force unloading protection mechanism is formed, greatly enhancing the compressive strength of the cable. It can also cooperate with the corrugated collar, ball bearings and inner sheath to further transform the disturbing force of the cable, prevent the conductor from being displaced under external force, effectively enhance the compactness and stability among various structures inside the cable. Through the cooperation of the exhaust valve, arc holes, communication ports, guiding holes, series ports, communication grooves, annular bladder pieces, outer communication cavity, inner return cavity, return pipe and intake valve, the sulfur hexafluoride gas can be directionally guided, greatly improving the flow fluency and stability of sulfur hexafluoride gas, and ensuring the reliability of heat dissipation work and pressure relief and buffering work.

[0029] To sum up, this cable can multiply transform and utilize external disturbing forces, turn the unfavorable factors of external disturbing forces into favorable factors for heat dissipation and compression resistance, effectively integrate the heat dissipation mechanism and the compression resistance and force unloading mechanism, endow the cable with the ability of active convective heat dissipation while endowing the conductor with ductility, enable the cable to adapt to the frequent displacement requirements of mobile devices, greatly improve the cable strength, and can achieve dual shielding protection for the cable transmission work, realize the rapid dispersion and release of disturbing pressure, and improve the reliability of flame retardant work. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, but do not constitute a limitation to the present invention.

[0031] In the drawings:

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

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

[0034] Figure 3 is a schematic structural diagram of the installation structure of the outer clamping bladder of the present invention;

[0035] Figure 4 is a schematic structural diagram of the installation structure of the inner communication pipe of the present invention;

[0036] Figure 5 is a schematic structural diagram of the fusion strengthening mechanism of the present invention;

[0037] Figure 6 is a schematic structural diagram of the installation structure of the inner arc air bladder of the present invention;

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

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

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

[0041] Reference numerals in the figure: 1, outer sheath; 11, conductor; 12, insulating sleeve; 13, shielding net;

[0042] 200, fusion strengthening mechanism; 201, limiting convex ring; 202, conversion cavity; 203, arc-shaped plate; 204, sliding rod; 205, hollow rib; 206, communication 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, conduction cylinder; 220, drainage pipe; 221, hollow ring; 222, axial pipe; 223, inner partition;

[0043] 300, synchronous protection mechanism; 301, outer separation ring; 302, outer sleeve; 303, cylindrical bladder pad; 304, waist bag; 305, outer clamping bladder; 306, isolation seat; 307, exhaust valve; 308, arc-shaped hole; 309, communication port; 310, guiding hole; 311, series port; 312, communication groove; 313, annular bladder piece; 314, outer through cavity; 315, inner return cavity; 316, return pipe; 317, intake valve; 318, corrugated collar; 319, ball; 320, inner sheath. Specific embodiments

[0044] The preferred embodiments of the present invention will be 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] Embodiment: As Figures 1-9 shown, the present invention provides a technical solution, a flame-retardant shielded rubber-sheathed flexible cable, including an outer sheath 1, 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 outside the conductor 11, a shielding net 13 is embedded and sleeved on the outer curved surface of the insulating sleeve 12, and a fusion strengthening mechanism 200 is installed at the position outside the shielding net 13 inside the outer sheath 1;

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

[0047] Inside the outer sheath 1, at an equidistant and uniform position outside the shielding net 13, a number of limiting convex rings 201 are installed. Inside the limiting convex rings 201, a number of conversion cavities 202 are opened at equal angles along the circumferential direction. Inside the conversion cavities 202, arc-shaped plates 203 are symmetrically and slidably installed. In the middle of the side end face of the arc-shaped plate 203, a sliding rod 204 is installed. At the end of the sliding rod 204, a hollow rib 205 is installed. In the middle of the side end face of the sliding rod 204, a communication hole 206 is opened. 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 concave arc-shaped. The limiting head 207 is sleeved outside the conductor 11. The conductor 11 is distributed in a wavy shape along the axial direction to improve the tensile strength;

[0048] At both positions on the outer curved surface of the conversion cavity 202 on both sides of the arc-shaped plate 203, air suction valves 208 are embedded and installed. Inside the limiting convex ring 201, an inner arc airbag 210 is installed. On the outer curved surface of the inner arc airbag 210, air blowing valves 209 are embedded and installed at positions corresponding to the air suction valves 208. On both sides of the outer sheath 1 at positions corresponding to the limiting convex rings 201, annular grooves 211 are opened. In the middle of the side end face of the outer sheath 1, an inner through pipe 214 is inserted.

[0049] Outside the annular groove 211, a protective ring 212 is embedded and installed. On the outer curved surface of the protective ring 212, a number of air guide nozzles 213 are embedded and installed at equal angles along the circumferential direction. At a position on one side of the limiting convex ring 201 corresponding to the annular groove 211, an outer through ring 215 is installed. On the side end face of the inner arc airbag 210, at a position on the other side of one limiting convex ring 201, an air delivery pipe 216 is installed. On the inner curved surface of the outer through ring 215, a straight pipe 217 is installed. Inside the inner through pipe 214, a number of inner partition plates 223 are installed at an equidistant and uniform position. The distance between the inner partition plates 223 is the same as that of the limiting convex ring 201. The two ends of the space between the inner partition plates 223 inside the inner through pipe 214 are respectively communicated with the air delivery pipe 216 and the straight pipe 217 to improve the heat exchange effect. On the outer curved surface of the outer through ring 215, a number of exhaust pipes 218 are installed at equal angles along the circumferential direction;

[0050] At the end of the air suction valve 208, a conduction cylinder 219 is installed. The gap between the two arc-shaped plates 203 inside the conversion cavity 202 is communicated with the conduction cylinder 219 through the air suction valve 208. The gap between the two arc-shaped plates 203 inside the conversion cavity 202 is communicated with the inner arc airbag 210 through the air blowing valve 209. The gap between the two arc-shaped plates 203 inside the conversion cavity 202 is communicated with the hollow rib 205 through the communication hole 206 to limit and guide the air flow. In the middle of the outer curved surface of the conduction cylinder 219, a drainage pipe 220 is installed. At the end of the drainage pipe 220, a hollow ring 221 is installed;

[0051] 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, and the exhaust pipe 218 and the axial tube 222 are both distributed adjacent to the air guide nozzle 213, and 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, and the annular groove 211 is filled with activated carbon to improve the airflow stability.

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

[0053] A plurality of outer spacer rings 301 are evenly and equidistantly mounted on the outer curved surface of the inner through tube 214, an outer sleeve 302 is mounted on the outer curved surface of the outer spacer ring 301, a plurality of serial ports 311 are opened at equal angles on the side end surface of the outer spacer ring 301 along the circumferential direction, a cylindrical capsule pad 303 is sleeved on the outer side of the outer spacer ring 301, a plurality of arc holes 308 are opened at equal angles on one side of the outer curved surface of the cylindrical capsule pad 303 along the circumferential direction, a plurality of connecting ports 309 are opened at equal angles on the other side end surface of the cylindrical capsule pad 303 along the circumferential direction, a waist capsule 304 is mounted on the end of the cylindrical capsule pad 303, and a plurality of guide holes 310 are opened at equal angles on the outer curved surface of the outer sleeve 302 corresponding to the middle position of the waist capsule 304 along the circumferential direction;

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

[0055] An inner sheath 320 is sleeved outside the insulating sleeve 12. The corrugated collar 318 fits with the inner sheath 320, the ball 319 fits with the hollow rib 205, and the hollow rib 205 is connected to the inner sheath 320 through the limiting head 207 and the corrugated collar 318. Both the conductor 11 and the hollow rib 205 pass through the gap between the outer card capsule 305 and the waist capsule 304 for double-layer shielding protection. The cylindrical capsule pad 303 and the waist capsule 304 are connected end to end. The outer shape of the waist capsule 304 is hourglass-shaped. The outer through cavity 314 is located outside the inner return 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 inside 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 to improve the structural stability of the cable and enhance the working reliability.

[0056] A corrugated collar 318 is embedded and installed at the position corresponding to the inner sheath 320 on the side end face of the limiting head 207. Both the exhaust valve 307 and the arc-shaped hole 308 are communicated with the gap inside the outer sheath 1 outside the inner sheath 320. The inner return cavity 315 is communicated with the other side of the inner cavity of the outer card capsule 305 through the return pipe 316 and the intake valve 317. Both the communication port 309 and the guiding hole 310 are communicated with the waist capsule 304. The communication groove 312 is communicated with the inner return cavity 315 to further improve the heat dissipation efficiency and compressive strength of the cable. A number of balls 319 are embedded and installed in a circumferentially equiangular manner on the outer side of the hollow rib 205 at the inner arc surface of the limiting head 207.

[0057] The working principle and usage process of the present invention: During the application of this flame-retardant shielded rubber-sheathed flexible cable, first, according to the actual usage requirements, that is, according to the actual usage scenarios, specific uses, loads, etc., the specific parameters such as the transmission capacity and length of the cable should be selected and determined. Here, taking the transmission of electrical energy for mobile equipment in coal mines as an example;

[0058] First, based on the electrical energy load requirements of the mobile equipment, select a cable with a transmission capacity that matches it, and determine the length of the cable according to the displacement requirements of the mobile equipment. Here, on the premise of not affecting the normal operation of the mobile equipment, the length of the cable used should be minimized as much as possible to save the cable, reduce costs, and at the same time avoid the cable from being wound and coiled during the displacement of the mobile equipment. After selecting the cable specifications, connect the conductor 11 to the mobile equipment and the external relevant energy supply devices correspondingly, and then it can be put into normal use;

[0059] During the use of the cable, in the initial state, under the elastic support of the hollow rib 205 and the limiting buckling actions of the limiting head 207, the corrugated collar 318, and the inner sheath 320, the conductor 11 is distributed in a wavy shape along the radial direction inside the outer sheath 1. As the mobile device moves, the cable will be subjected to corresponding external pulling forces. At this time, under the action of the external pulling force, the hollow rib 205 will deform accordingly, and under the action of different external pulling forces and its own elastic force, it will reciprocally transform to a straight state to varying degrees from the concave arc state;

[0060] With the reciprocating deformation of the hollow rib 205, under the limiting buckling actions of the limiting head 207, the corrugated collar 318, and the inner sheath 320, the conductor 11 will displace correspondingly with the hollow rib 205, and reciprocally transform to varying degrees between a wavy shape and a straight shape, avoiding the direct hard pulling and impact of the external force on the conductor 11, compensating for the error in the cable length requirement caused by the displacement during the operation of the mobile device, and variably endowing the conductor 11 with ductility, enabling it to adapt to the frequent displacement actions during the operation of the mobile device;

[0061] Meanwhile, during the reciprocating deformation of the hollow rib 205, it will also reciprocally push and pull the sliding rods 204 at both ends, forcing the arc-shaped plate 203 to reciprocally displace inside the conversion cavity 202 driven by the sliding rods 204, thereby causing the space sizes on both sides of the arc-shaped plate 203 inside the conversion cavity 202 to reciprocally change, and further forming a negative pressure at the suction valve 208 and a positive pressure at the blowing valve 209;

[0062] Subsequently, during the reciprocating displacement of the arc-shaped plate 203, under the action of the negative pressure, the external air passes through the air guide nozzle 213, enters the annular groove 211, is dehumidified by activated carbon filtration, is inhaled into the hollow ring 221 through the axial pipe 222, and after being secondarily split by the hollow ring 221, will flow into each conduction cylinder 219 through the drainage pipe 220, and under the current-limiting and guiding action of the suction valve 208, is inhaled into each conversion cavity 202. Subsequently, during the reciprocating displacement of the arc-shaped plate 203, under the current-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 will expand correspondingly under the support of the air flow, squeezing the outer inner sheath 320, making each conductor 11 more stable, avoiding the circumferential misalignment displacement of each conductor 11 under the action of the external force, ensuring the transmission stability. At the same time, the air flowing in from the outside will absorb the heat dissipated during the operation of each conductor 11. Subsequently, the air flow will flow into the inner through pipe 214 through the air delivery pipe 216 and flow along the inner through pipe 214 to the straight pipe 217 communicated therewith, further absorbing the heat dissipated by each conductor 11 inside the outer sheath 1 during operation;

[0064] Subsequently, the air flow will flow into the outer through-ring 215 through the straight pipe 217, and under the conduction of the exhaust pipe 218, it will flow into the annular groove 211 connected thereto through the exhaust pipe 218. After being filtered and purified, it will be discharged into the external air through the air guide nozzle 213. Then, during the operation of the mobile device, with the displacement and pulling of the mobile device, a number of relatively independent internal and external air exchange cycles will be formed between two adjacent communication grooves 312. Under the connection effect of the hollow rib 205 and the communication hole 206, the relatively independent internal and external air exchange cycles will be connected in series and opened up;

[0065] Thus, during the operation of the mobile device, by means of the displacement pulling force during the operation of the external mobile device, the external air flow is promoted to flow inside and outside the outer sheath 1. While promoting the rapid discharge of the heat dissipated during the operation of the conductor 11, the displacement pulling force can be fully transmitted, transformed, buffered and diluted. During the process of the air flow, the external pulling force is dispersed and diluted along the radial direction and is transformed into the pressure of the air flow, which is released to the outside along with the flow of the air flow. Similarly, when the cable is subjected to other external impact pulling forces, it can also be deformed along with the hollow rib 205, and the pulling force can be converted, utilized, buffered and released, so as to avoid excessive impact force on the local part of the cable;

[0066] Similarly, during the use of the cable, when the hollow rib 205 is pulled by an external force and drives the conductor 11 to reciprocate correspondingly under the limiting buckle action of the limiting head 207, the corrugated sleeve ring 318 and the inner sheath 320, the inner arc surface of the outer card capsule 305 will also be correspondingly squeezed and deformed, resulting in the corresponding reciprocating fluctuation of the air pressure inside it;

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

[0068] Finally, under the guiding action of the return pipe 316 and the intake valve 317, during the elastic reset process of the outer card capsule 305, it is pumped back into the outer card capsule 305 again. Thus, the complete cyclic flow of the sulfur hexafluoride gas is promoted. During this process, the sulfur hexafluoride gas will more directly absorb the heat dissipated by the conductor 11. The high specific heat capacity characteristic of the sulfur hexafluoride gas can be fully utilized. During the reverse flow process of the sulfur hexafluoride gas in the outer sleeve 302, the heat is transferred to the externally inhaled air flow, and the convection heat dissipation advantage of the sulfur hexafluoride gas is fully exerted to promote its rapid heat dissipation;

[0069] During the cyclic flow of sulfur hexafluoride gas, when the sulfur hexafluoride gas flows through the waist bag 304, it will force the waist bag 304 to change from the concave state to the flat state, and make different amplitudes of conversion according to the air flow pressure, that is, according to the magnitude of the external force, which can further buffer and dilute the external force. It can not only further conduct directional traction on the sulfur hexafluoride gas, but also cooperate with the cylindrical bag pad 303 and the outer clamping bag 305, and with the help of the external pressure, further limit and lock the conductor 11 to ensure the stability of the internal structure of the cable;

[0070] At the same time, it can further transmit the external impact force along the circumferential direction of the cable to double buffer and balance the external force. Coupled with the connection function of the series port 311, it can promote the air pressure balance of sulfur hexafluoride gas at all parts inside the outer sheath 1, ensure the insulation shielding effect of sulfur hexafluoride gas, constitute a double protection mechanism for gas insulation shielding, and can further utilize the stability of sulfur hexafluoride gas. When the cable accidentally catches fire, it can isolate the surrounding oxygen and prevent the fire from spreading, realizing rapid flame retardancy.

[0071] Finally, it should be noted that the above are only the preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A flame-retardant and shielded rubber-sheathed flexible cable, comprising an outer sheath (1), characterized in that: A shielding net (13) is arranged inside the outer sheath (1), and a fusion strengthening mechanism (200) is installed at a position outside the shielding net (13) inside the outer sheath (1); The fusion strengthening mechanism (200) includes a limiting convex ring (201); Limiting convex rings (201) are evenly installed at equal intervals at a position outside the shielding net (13) inside the outer sheath (1). A plurality of conversion cavities (202) are formed inside the limiting convex ring (201). Arc-shaped plates (203) are symmetrically and slidably installed inside the conversion cavities (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 communication hole (206) is formed in the middle of the side end face of the sliding rod (204). A limiting head (207) is sleeved on the outer curved surface of the hollow rib (205); An air suction valve (208) is embedded and installed on the outer curved surface of the conversion cavity (202). An inner arc airbag (210) is installed inside the limiting convex ring (201). A blowing valve (209) is embedded and installed on the outer curved surface of the inner arc airbag (210); Annular grooves (211) are formed at both positions on both sides of the outer sheath (1), and an inner through pipe (214) is inserted through the middle of the side end face of the outer sheath (1).

2. A flame-retardant and shielded rubber-sheathed flexible cable according to claim 1, wherein, A plurality of conductors (11) are installed inside the outer sheath (1). An insulating sleeve (12) is sleeved outside the conductor (11). A shielding net (13) is embedded and sleeved on the outer curved surface of the insulating sleeve (12); A protective ring (212) is embedded and installed outside the annular groove (211). A plurality of air guide nozzles (213) are embedded and installed on the outer curved surface of the protective ring (212) at equal angles along 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). An air delivery pipe (216) is installed at a position on the side end face of the inner arc airbag (210) on the other side of one limiting convex ring (201). A straight pipe (217) is installed on the inner curved surface of the outer through ring (215). A plurality of exhaust pipes (218) are installed on the outer curved surface of the outer through ring (215) at equal angles along the circumferential direction; A conduction cylinder (219) is installed at the end of the air suction valve (208). A drainage pipe (220) is installed in the middle of the outer curved surface of the conduction cylinder (219). A hollow ring (221) is installed at the end of the drainage pipe (220). A plurality of axial pipes (222) are installed at equal angles along the circumferential direction in the middle of the side end face of the hollow ring (221).

3. A flame-retardant and 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 concave arc-shaped. The limiting head (207) is sleeved outside the conductor (11), and the conductors (11) are distributed in a wavy shape along the axis.

4. A flame-retardant and shielded rubber-sheathed flexible cable according to claim 2, characterized in that The gap inside the conversion cavity (202) between the two arc-shaped plates (203) is communicated with the conduction cylinder (219) through the suction valve (208). The gap inside the conversion cavity (202) between the two arc-shaped plates (203) is communicated with the inner arc airbag (210) through the blowing valve (209). The gap inside the conversion cavity (202) between the two arc-shaped plates (203) is communicated with the hollow rib (205) through the communication hole (206).

5. A flame-retardant and shielded rubber-sheathed flexible cable according to claim 2, characterized in that, The exhaust pipe (218) and the axial pipe (222) are both adjacent to the air guide nozzle (213). The exhaust pipe (218) and the axial pipe (222) are both communicated with the annular groove (211). The exhaust pipe (218) and the axial pipe (222) are not communicated with the same annular groove (211), and the annular groove (211) communicated with the exhaust pipe (218) and the annular groove (211) communicated with the axial pipe (222) are adjacent to each other. The annular groove (211) is filled with activated carbon.

6. A flame-retardant and shielded rubber-sheathed flexible cable according to claim 2, wherein, A number of inner partition plates (223) are evenly installed at equal intervals inside the inner through pipe (214). The distance between the inner partition plates (223) is the same as that of the limit convex ring (201). The two ends of the space inside the inner through pipe (214) between the inner partition plates (223) are respectively communicated with the air delivery pipe (216) and the straight pipe (217).

7. A flame-retardant shielded rubber-sheathed flexible cable according to claim 2, characterized in that, A synchronous protection mechanism (300) is installed outside the inner through pipe (214). The synchronous protection mechanism (300) includes an outer partition ring (301). A number of outer partition rings (301) are evenly installed at equal intervals on the outer curved surface of the inner through pipe (214). An outer sleeve pipe (302) is installed on the outer curved surface of the outer partition ring (301). A number of series ports (311) are opened at equal angles along the circumferential direction on the side end surface of the outer partition ring (301). A cylindrical bladder pad (303) is sleeved outside the outer partition ring (301). A number of arc-shaped holes (308) are opened at equal angles along the circumferential direction on one side of the outer curved surface of the cylindrical bladder pad (303). A number of communication ports (309) are opened at equal angles along the circumferential direction on the other side end surface of the cylindrical bladder pad (303). A waist bladder (304) is installed at the end of the cylindrical bladder pad (303). A number of guide holes (310) are opened at equal angles along the circumferential direction on the outer curved surface of the outer sleeve pipe (302) corresponding to the middle position of the waist bladder (304). An outer clamping capsule (305) is installed outside the cylindrical capsule pad (303). Isolation seats (306) are installed on both sides of the outer clamping capsule (305). A number of exhaust valves (307) are installed on one end face of the outer clamping capsule (305) at equal angles along the circumferential direction. A communication groove (312) is opened on the outer curved surface of the outer sleeve tube (302) corresponding to the middle position of the cylindrical capsule pad (303). An annular capsule piece (313) is installed inside the cylindrical capsule pad (303), and the annular capsule piece (313) divides the inner cavity of the cylindrical capsule pad (303) into an outer communication 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 capsule piece (313) corresponding to the arc-shaped hole (308). An intake valve (317) is installed at the end of the return pipe (316). An inner sheath (320) is sleeved outside the insulating sleeve (12). A corrugated sleeve ring (318) is installed on the side end face of the limit head (207) corresponding to the inner sheath (320). A number of rolling balls (319) are installed at equal angles along the circumferential direction on the inner arc surface of the limit head (207) outside the hollow rib (205).

8. A flame-retardant and shielded rubber-sheathed flexible cable according to claim 7, characterized in that, The corrugated sleeve ring (318) fits with the inner sheath (320), the rolling balls (319) fit 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 sleeve ring (318). Both the conductor (11) and the hollow rib (205) pass through the gap between the outer clamping capsule (305) and the waist capsule (304).

9. A flame-retardant and shielded rubber-sheathed flexible cable according to claim 7, characterized in that, The cylindrical capsule pad (303) and the waist capsule (304) are connected end to end. The outer shape of the waist capsule (304) is in the shape of an hourglass. The outer communication cavity (314) is located outside the inner return 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), as well as the inside of the outer sleeve tube (302), the cylindrical capsule pad (303), the waist capsule (304), and the outer clamping capsule (305) are all filled with sulfur hexafluoride gas.

10. A flame-retardant and shielded rubber-sheathed flexible cable according to claim 7, characterized in that, Both the exhaust valve (307) and the arc-shaped hole (308) are communicated with the gap inside the outer sheath (1) outside the inner sheath (320). The inner return cavity (315) is communicated with the other side of the inner cavity of the outer clamping capsule (305) through the return pipe (316) and the intake valve (317). Both the communication port (309) and the guide hole (310) are communicated with the waist capsule (304). The communication groove (312) is communicated with the inner return cavity (315).

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