CN115312248B

CN115312248B - Multi-layer co-extrusion type insulation cross-linking flame-retardant cable

Info

Publication number: CN115312248B
Application number: CN202211251884.9A
Authority: CN
Inventors: 刘航; 赵乐微
Original assignee: Jinte Cable Co ltd
Current assignee: Jinte Cable Co ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2022-12-09
Anticipated expiration: 2042-10-13
Also published as: CN115312248A

Abstract

The invention discloses a multilayer co-extrusion insulating cross-linking flame-retardant cable, which relates to the technical field of cables and comprises a cable body, wherein a pre-connecting mechanism is arranged on the outer side of the cable body, the pre-connecting mechanism comprises an outer sheath, a connecting protective shell is arranged on one side of the outer sheath, a movable mounting seat is arranged in the connecting protective shell, a clamping air bag ring is arranged on one side of the movable mounting seat, a linkage plate and an adjusting pointer are arranged on the outer side of the movable mounting seat, a driving rod is arranged on the other side of the movable mounting seat, a guide block is arranged on the outer surface of the driving rod, and a sliding groove is formed in the side end surface of the connecting protective shell.

Description

Multi-layer co-extrusion type insulation cross-linking flame-retardant cable

Technical Field

The invention relates to the technical field of cables, in particular to a multi-layer co-extrusion type insulated cross-linked flame-retardant cable.

Background

The cable is an electric energy or signal transmission device, usually twisted by several or several groups of wires, similar to the cable, each group of wires are insulated and often twisted around a center, the whole outside is wrapped with a highly insulating covering layer, the cable has the characteristics of internal electrification and external insulation, the cable comprises a power cable, a control cable, a compensation cable, a shielding cable, a high-temperature cable, a fire-resistant cable, a mining cable, an aluminum alloy cable and the like, the cables are all composed of single-strand or multi-strand wires and insulating layers and are used for connecting circuits, electric appliances and the like, and the cable has higher requirements on the protection performance of the cable in the occasions where the cables such as a cable well, a power distribution room and the like are concentrated.

But the cable in the existing market, protection to the cable is comprehensive inadequately, can not compromise performances such as resistance to compression of cable, anti-interference, fire-retardant, insulation and heat dissipation and mechanical strength, when leading to the cable to use in the occasion that the cable is comparatively concentrated, the fault rate is higher, the phenomenon of catching fire appears easily, and can not cut off the isolation fault cable in time again after catching fire, so that produce chain reaction and cause bigger potential safety hazard and economic loss, and the cable is when erection joint, because there is not reasonable supplementary protection coupling mechanism, not only because of the joint department reserves longer cable, cause the cable extravagant, also lead to connecting reliability also not good enough, the potential safety hazard has further been enlarged.

Disclosure of Invention

The invention provides a multilayer co-extrusion insulating cross-linking flame-retardant cable, which can effectively solve the problems that the cable in the current market proposed in the background technology has incomplete protection on the cable, cannot give consideration to the performances of compression resistance, interference resistance, flame retardance, insulation, heat dissipation, mechanical strength and the like of the cable, so that when the cable is used in a concentrated occasion, the fault rate is high, a fire catching phenomenon easily occurs, and the fault cable cannot be cut off in time after the fire catching, so that a chain reaction is generated to cause larger potential safety hazard and economic loss.

In order to achieve the purpose, the invention provides the following technical scheme: a multi-layer co-extrusion insulation cross-linking flame-retardant cable comprises a wire body, wherein a pre-connecting mechanism is arranged on the outer side of the wire body;

the pre-attachment mechanism includes an outer sheath;

a connecting protective shell is arranged on one side of the outer sheath, a movable mounting seat is arranged in the connecting protective shell, a clamping air bag ring is mounted on one side of the movable mounting seat, and a linkage plate and an adjusting pointer are mounted on the outer side of the movable mounting seat;

a driving rod is installed on the other side of the movable installation seat, a guide block is installed on the outer surface of the driving rod, and a sliding groove is formed in the end face of the side of the connecting protection shell;

the end face of the connecting protective shell side is provided with an installation block, the end face of the installation block side is provided with a rotating shaft seat, the end face of the rotating shaft seat side is provided with a screw, the end face of the installation block side is provided with a limiting rod, and the outer side of the screw is provided with a driving block;

connect protective case internally mounted and have the fixed mounting seat, fixed gasbag circle is installed to fixed mounting seat a side end face, original pointer is installed to fixed mounting seat curved surface one side.

Preferably, the outer side curved surface of the fixed mounting seat is symmetrically provided with mounting rods, and the fixed mounting seat is connected with the connecting protective shell through the mounting rods;

the middle part of the bottom end of the driving block is provided with a ball in a rolling way;

the middle parts of the end faces of the two sides of the guide block are uniformly provided with a plurality of grinding beads in an equidistant rolling manner, and the sliding groove is formed in the position, corresponding to the guide block, of the middle part of the end face of the side of the connecting protective shell;

the middle parts of the curved surfaces of the clamping air bag ring and the fixed air bag ring are provided with inflation tubes;

the end part of the inflation tube is clamped with an inflation valve, and the middle part of the end face of the outer side of the connecting protective shell, which corresponds to the original pointer, is provided with a scale plate.

Preferably, the wire body comprises an insulating pad;

an insulating pad is embedded in the middle of the wire body, a plurality of wires are embedded in the edge of the side end face of the insulating pad at equal angles along the circumferential direction, a shielding net is sleeved outside the wires, and reinforcing ribs are embedded in the middle of the side end face of the insulating pad;

the outer side of the insulation pad is sleeved with a heat-conducting silica gel sleeve, the outer side of the heat-conducting silica gel sleeve is filled with heat-conducting silicone grease, the outer side of the heat-conducting silicone grease is provided with a heat insulation pad, the outer side of the heat insulation pad is glued with a buffering air bag, the outer side of the buffering air bag is provided with a co-extrusion sheath, the outer side of the co-extrusion sheath is provided with an alkali-free glass fiber net, the outer side of the alkali-free glass fiber net is sleeved with a reinforcing net, and the outer side of the reinforcing net is provided with a tensile outer sleeve; and an outer sheath is arranged on the outer side of the tensile outer sheath.

Preferably, an auxiliary on-off mechanism is installed inside the pre-connection mechanism;

the auxiliary on-off mechanism comprises an adjusting groove;

an on-off sliding plate is slidably mounted on the inner side of the movable mounting seat, a fixed sliding plate is slidably mounted on the inner side of the fixed mounting seat, adjusting grooves are formed in the middle parts of the inner sides of the fixed mounting seat and the movable mounting seat, and the on-off sliding plate and the fixed sliding plate are slidably mounted in the adjusting grooves;

the side end faces of the on-off sliding plate and the fixed sliding plate are embedded with a plurality of wiring sleeves at equal angles along the circumferential direction, elastic clamping pieces are arranged on the inner sides of the wiring sleeves, a plurality of sliding rods are embedded with the side end faces of the on-off sliding plate and the fixed sliding plate in a sliding manner at equal angles along the circumferential direction, and fastening springs are sleeved on the outer sides of the sliding rods;

the improved multifunctional cable connector is characterized in that a multi-stage telescopic rod is installed on one side of the wiring sleeve, a tensioning spring is sleeved on the outer side of the multi-stage telescopic rod, a shielding telescopic hose is sleeved on the outer side of the tensioning spring, an electric connection plug is installed on the side end face of the shielding telescopic hose and connected with the wiring sleeve through the multi-stage telescopic rod, an insulating block is installed in the middle of the side end face of the on-off sliding plate and the side end face of the fixed sliding plate, a telescopic limiting rod is installed in the middle of the side end face of the insulating block, a cutting spring is sleeved on the outer side of the telescopic limiting rod, and an insulating telescopic hose is sleeved on the outer side of the cutting spring.

Preferably, a protection adjusting mechanism is installed on the outer side of the pre-connecting mechanism;

the protection adjusting mechanism comprises a protection air bag;

the protective air bag is embedded in the inner side of the outer sheath, air guide tubes are symmetrically arranged on the side end face of the protective air bag, a connecting box is arranged at the end part of the air guide tube, a sub-clamping tube is arranged in the middle of the side end face of the connecting box, an air supplementing tube is arranged on the side end face of the other side of the protective air bag, and an air supplementing nozzle is clamped at the end part of the air supplementing tube;

pneumatic boxes are respectively arranged at positions, located on two sides of the movable mounting seat, in the connecting protection shell, mounting grooves are formed in the connecting protection shell corresponding to the positions of the pneumatic boxes, sliding plates are slidably mounted inside the pneumatic boxes, push rods are mounted in the middles of the side end faces of the sliding plates, the sliding plates are connected with linkage plates through the push rods, sealing rings are embedded in the middles of the side end faces of the pneumatic boxes, the push rods are connected with the pneumatic boxes through the sealing rings, vent pipes are mounted in the middles of the other side end faces of the pneumatic boxes, air guide boxes are mounted at the end portions of the vent pipes, and female clamping pipes are mounted in the middles of the side end faces of the air guide boxes;

connect the protecting crust side end face and be located installation piece one side position department and install the pressure regulating gas box, pressure regulating gas box side end face mid-rotation installs sealed axle bed, sealed axle bed mid-rotation installs the lead screw, the piston is installed through the screw thread in the lead screw outside, pressure regulating gas box side end face mid-mounting has the connection gas-supply pipe, the pressure regulating gas box is connected with the air guide box through connecting the gas-supply pipe.

Preferably, the spout shape is the cross, the spout agrees with the guide block mutually, the drive block side end face corresponds actuating lever position department and has seted up the arc draw-in groove, drive block and gag lever post sliding connection, the scale plate is transparent material.

Preferably, the on-off slide plate is connected with the movable mounting seat in a sliding mode through a slide rod, the fixed slide plate is connected with the fixed mounting seat in a sliding mode through a slide rod, the on-off slide plate and the fixed slide plate are both penetrated through by the wiring sleeve, the multi-stage telescopic rod is made of a conductive material, and the electric connection plug is matched with the wiring sleeve.

Preferably, the maximum expansion amount of the multi-stage telescopic rod is equal to the original length of the tension spring, the maximum expansion amount of the telescopic limiting rod is equal to the original length of the cutting spring, the original length of the cutting spring is greater than the original length of the tension spring, and the elastic coefficient of the cutting spring is greater than the elastic coefficient of the tension spring.

Preferably, a plurality of sealing gaskets are uniformly sleeved on the outer side of the daughter card tube at equal intervals, a plurality of airtight gaskets are uniformly sleeved on the outer side of the sliding plate at equal intervals, the inner wall of the mother card tube is matched with the outer wall of the daughter card tube, and the volume of the air guide box is equal to the sum of the volumes of the two pneumatic boxes.

Compared with the prior art, the invention has the beneficial effects that: the invention has scientific and reasonable structure and safe and convenient use;

1. be provided with crowded sheath altogether, cooperate through crowded sheath and alkali-free glass fiber net altogether, can effectively improve flame retardant property, through sheathe in the wire outside insulating pad, can avoid the inside many wires of line body to take place mutual contact, cause the short circuit phenomenon, can avoid the wire electromagnetic interference phenomenon to appear in the use through the shielding net, cooperate through heat conduction silicone sleeve, heat conduction silicone grease cover and heat insulating pad, can effectively improve heat dispersion, avoid the line body too high temperature in the use to influence normal use, through buffering the gasbag, can effectively improve the protection comprehensiveness, avoid the line body to be extruded by external force and damage, and through its inside inert gas, can restrain the intensity of a fire to spread when the cable catches fire, cooperate through strengthening rib and reinforcing mesh, can effectively improve the line body and continue intensity, the line body plasticity is strengthened, through tensile overcoat, then effectively improve the tensile property of the line body, and improve its wearability, effectively prolong its life.

2. The cable head part pre-connecting device is provided with a pre-connecting mechanism, the head parts of two sections of cables can be quickly aligned and fixed by matching the inflation tube, the inflation valve, the clamping air bag ring and the fixing air bag ring, so that a worker can quickly connect a plurality of sections of cables, the convenience of cable connection is improved, the connection stability of the cable head part is effectively improved, and the cable head part pre-connecting device can adapt to cables with different diameters and sizes, expand the application range of the cables, effectively improve the protection effect and enable the protection to be more comprehensive by air bag type soft clamping;

the driving rod, the guide block, the sliding chute, the rotating shaft seat, the mounting block, the screw rod, the limiting rod and the driving block are matched, so that original driving force can be provided for the movable mounting seat, the distance between the movable mounting seat and the fixed mounting seat is changed, the indirect butt joint work of wires at two ends is quickly realized during cable mounting, original pressure is given to a joint, the initial connection stability of a cable is improved, a standard clamping force is provided for the on-off work of the auxiliary on-off mechanism through the linkage plate, and a bedding is made for the subsequent automatic on-off work;

through the oversheath, it cooperatees with the installation pole to connect the protecting crust, can be when improving the protecting effect to the cable, for each mechanism provides stable support power, through adjusting the pointer, original pointer and scale plate cooperate, then can confirm the distance between movable mounting seat and fixed mounting seat in real time, improve the regulation precision of original pressure, improve the convenience that protection adjustment mechanism carried out regulation work, cooperate through falling mill pearl and ball, then effectively reduce the frictional force in the accommodation process, effectively improve the sensitivity that supplementary break-make mechanism carries out automatic break-make work.

3. The auxiliary on-off mechanism is arranged, the auxiliary cable joint can realize pull-plug type connection through the matching of the wiring sleeve, the tensioning spring, the power connection plug, the multi-stage telescopic rod, the cutting spring and the telescopic limiting rod, on one hand, the quick on-off work can be realized when the cable is on fire, the connection between a fault cable and a normal cable can be cut off in time, the chain reaction is avoided, and the damage of a non-fault cable is avoided;

through the adjustment tank, the break-make slide, fixed slide, slide bar and fastening spring cooperate, then can effectively improve the connection stability between cable joint and wiring sleeve, and wiring sleeve and connect the connection stability between the electric plug, elastic force through the elasticity clamping piece, make the device adapt to the cable of different diameter sizes, when expanding its accommodation, the connection stability of joint department has further been improved, and effectively improved the contact surface of joint department, effectively reduce generating heat of cable joint department, through shielding expansion hose, insulating block and insulating expansion hose cooperate, then when cable junction, protect cable joint department, avoid different wire contacts to cause short circuit phenomenon, and effectively reduce electromagnetic interference.

4. The protection adjusting mechanism is arranged, and the protection adjusting mechanism is matched with the pneumatic box, the sliding plate and the push rod, so that on one hand, a long-term stable clamping pressure can be provided for the movable mounting seat by utilizing air pressure in the normal use process of the cable, a balance acting force is formed by the clamping pressure and the elastic force of the tensioning spring and the cutting spring, and the connection stability of a joint is effectively improved;

through the air guide box, pressure regulating air box, the lead screw, a piston, sealed axle bed and connection gas-supply pipe cooperate, can be after removing original pressure, adjust pneumatic box inside atmospheric pressure, make around removing original pressure, the clamping-force that movable mounting seat received is unanimous, further effectively improve connection stability, cooperate through the protection gasbag, can effectively improve the protecting effect to the cable, and when the cable catches fire, in time release inert gas, prevent the intensity of a fire from stretching, through the air supplement pipe, the air supplement mouth, the air duct, the connection box, the son blocks the pipe, the sealing washer, female card pipe, mounting groove and breather pipe cooperate, then effectively improved the convenience of inflating work, thereby further improved the installation convenience.

To sum up, through above-mentioned mechanism, can be when the cable mounting, avoid joint department to reserve longer one section cable, cause the extravagant phenomenon of cable, and effectively improve connection reliability, when the cable is normally used, can effectively improve cable protective effect, effectively improve the resistance to compression of cable, anti-interference, fire-retardant, insulating and heat dissipation and mechanical strength's performance, improve the comprehensive nature to cable protection, when the cable catches fire, in time automatic cutout keeps apart trouble cable, prevent the intensity of a fire to spread, avoid causing bigger economic loss and potential safety hazard because of chain reaction.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the structure of the wire body of the present invention;

FIG. 3 is a schematic view of the drive rod configuration of the present invention;

FIG. 4 is a schematic view of the connecting shield structure of the present invention;

FIG. 5 is a schematic view of the putter of the present invention;

FIG. 6 is a schematic view of the pre-attachment mechanism of the present invention;

FIG. 7 is a schematic view of the auxiliary on/off mechanism of the present invention;

FIG. 8 is a schematic view of the structure of the air bag of the present invention;

FIG. 9 is a schematic view of the guard adjustment mechanism of the present invention;

reference numbers in the figures: 1. a wire body; 101. an insulating pad; 102. a wire; 103. a shielding mesh; 104. reinforcing ribs; 105. a heat-conducting silica gel sleeve; 106. heat-conducting silicone grease; 107. a heat insulating pad; 108. a buffer air bag; 109. co-extruding the sheath; 110. an alkali-free glass fiber web; 111. a reinforcing mesh; 112. a tensile outer sleeve;

2. a pre-connection mechanism; 201. an outer sheath; 202. connecting the protective shell; 203. a movable mounting seat; 204. a drive rod; 205. a guide block; 206. reducing the grinding beads; 207. mounting blocks; 208. a screw; 209. a limiting rod; 210. a drive block; 211. clamping the airbag ring; 212. a linkage plate; 213. adjusting the pointer; 214. fixing the mounting seat; 215. mounting a rod; 216. fixing the air bag ring; 217. an original pointer; 218. an inflation tube; 219. an inflation valve; 220. a ball bearing; 221. a chute; 222. a scale plate; 223. a rotating shaft seat;

3. an auxiliary on-off mechanism; 301. an adjustment groove; 302. switching on and off the sliding plate; 303. fixing the sliding plate; 304. a wire connection sleeve; 305. an elastic clip; 306. a slide bar; 307. a fastening spring; 308. a multi-stage telescopic rod; 309. tensioning the spring; 310. shielding the flexible hose; 311. connecting a power plug; 312. an insulating block; 313. a telescopic limiting rod; 314. cutting off the spring; 315. an insulated flexible hose;

4. a protection adjustment mechanism; 401. a protective air bag; 402. an air duct; 403. a connection box; 404. a sub-clamping tube; 405. a pneumatic cartridge; 406. a sliding plate; 407. a push rod; 408. a seal ring; 409. a gas guiding box; 410. a mother clamping pipe; 411. a pressure regulating gas box; 412. a screw rod; 413. a piston; 414. sealing the shaft seat; 415. connecting a gas transmission pipe; 416. mounting grooves; 417. a breather pipe; 418. air supplying pipe; 419. the air supplement nozzle.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Example (b): as shown in fig. 1-9, the present invention provides a technical solution, a multilayer co-extrusion insulation cross-linking flame retardant cable, which includes a cable body 1, a pre-connection mechanism 2 is disposed outside the cable body 1, and the pre-connection mechanism 2 can assist workers in performing multi-stage cable connection work during cable installation, so as to achieve accurate positioning and butt joint of cable joints, and simultaneously give an initial elastic pressure to the cable joints, so that the cable joints are tightly connected in an insertion manner under the action of the initial pressure, so as to improve the connection reliability of the joints, and effectively protect the cable joints, thereby effectively improving the protection effect and power consumption safety of the cable;

the cable body 1 comprises an insulating pad 101, a lead 102, a shielding net 103, a reinforcing rib 104, a heat-conducting silica gel sleeve 105, heat-conducting silicone grease 106, a heat-insulating pad 107, a buffer air bag 108, a co-extrusion sheath 109, an alkali-free glass fiber net 110, a reinforcing net 111 and a tensile outer sleeve 112;

an insulating pad 101 is embedded in the middle of the wire body 1, a plurality of wires 102 are embedded in the edge of the end face of the side end of the insulating pad 101 at equal angles along the circumferential direction, a shielding net 103 is sleeved outside the wires 102, and reinforcing ribs 104 are embedded in the middle of the end face of the side end of the insulating pad 101;

the heat-conducting silica gel sleeve 105 is sleeved on the outer side of the insulating pad 101, the heat-conducting silica gel sleeve 105 is filled with the heat-conducting silica gel 106, the heat-insulating pad 107 is installed on the outer side of the heat-conducting silica gel sleeve 106, the buffering air bag 108 is glued on the outer side of the heat-insulating pad 107, the co-extrusion sheath 109 is installed on the outer side of the buffering air bag 108, the co-extrusion sheath 109 comprises a cross-linked polyethylene insulating sleeve, a cross-linked foaming insulating sleeve, a cross-linked halogen-free low-smoke flame-retardant polyolefin insulating sleeve and adopts a three-layer co-extrusion technology to extrude the heat-insulating sleeve once, the insulating pad 101 is made of a high-permeability material, the shielding net 103 is formed by weaving silver-plated copper wires, the heat-insulating pad 107 is made of an aerogel material, the buffer air bag 108 is filled with inert gas so as to improve the protection comprehensiveness of cables, the alkali-free glass fiber net 110 is installed on the outer side of the co-extrusion sheath 109, the reinforcing net 111 is sleeved on the outer side of the alkali-free glass fiber net 110, and the tensile outer sleeve 112 is installed on the outer side of the reinforcing net 111.

The pre-connection mechanism 2 comprises an outer sheath 201, a connection protective shell 202, a movable mounting seat 203, a driving rod 204, a guide block 205, a grinding ball 206, a mounting block 207, a screw 208, a limiting rod 209, a driving block 210, a clamping air bag ring 211, a linkage plate 212, an adjusting pointer 213, a fixed mounting seat 214, a mounting rod 215, a fixed air bag ring 216, an original pointer 217, an inflation tube 218, an inflation valve 219, a ball 220, a chute 221, a scale plate 222 and a rotating shaft seat 223;

an outer sheath 201 is installed on the outer side of the tensile outer sheath 112, a connecting protective shell 202 is installed on the end face of one side of the outer sheath 201, a movable installation seat 203 is installed inside the connecting protective shell 202 in a sliding mode, a clamping air bag ring 211 is installed on the end face of one side of the movable installation seat 203, linkage plates 212 are symmetrically installed on the outer side of the movable installation seat 203 in a curved surface mode, and an adjusting pointer 213 is installed on one side of the curved surface of the movable installation seat 203;

the other side of the curved surface of the movable mounting seat 203 is provided with a driving rod 204, the middle part of the outer surface of the driving rod 204 is provided with a guide block 205, the middle parts of the end surfaces at two sides of the guide block 205 are uniformly provided with a plurality of grinding balls 206 in a rolling manner at equal intervals, and the middle part of the end surface at the side end of the connecting protective shell 202 corresponding to the position of the guide block 205 is provided with a sliding groove 221;

a mounting block 207 is mounted on the side end surface of the connecting protective shell 202, which is located on one side of the sliding groove 221, a rotating shaft seat 223 is rotatably mounted on one side of the side end surface of the mounting block 207, a screw 208 is rotatably mounted in the middle of the side end surface of the rotating shaft seat 223, a limiting rod 209 is mounted on the side end surface of the mounting block 207, which is located on one side of the screw 208, a driving block 210 is mounted on the outer side of the screw 208 through threads, and a ball 220 is rotatably mounted in the middle of the bottom end of the driving block 210;

the fixed mounting seat 214 is fixedly mounted at a position on one side of the movable mounting seat 203 inside the connecting protective shell 202, mounting rods 215 are symmetrically mounted on the outer side curved surface of the fixed mounting seat 214, the fixed mounting seat 214 is connected with the connecting protective shell 202 through the mounting rods 215, a fixed air bag ring 216 is mounted on one side end surface of the fixed mounting seat 214, an original pointer 217 is mounted on one side of the curved surface of the fixed mounting seat 214, air inflation tubes 218 are mounted in the curved surfaces of the clamping air bag ring 211 and the fixed air bag ring 216, air inflation valves 219 are clamped at the end portions of the air inflation tubes 218, a scale plate 222 is mounted in the middle of the outer side end surface of the connecting protective shell 202 corresponding to the original pointer 217, the shape of the sliding groove 221 is cross-shaped, the sliding groove 221 is matched with the guide block 205, an arc-shaped clamping groove is formed in the position of the side end surface of the driving block 210 corresponding to the driving rod 204, the driving block 210 is slidably connected with the limiting rod 209, and the scale plate 222 is made of a transparent material so as to adjust initial clamping force and improve convenience and stability of mounting and connection.

The auxiliary on-off mechanism 3 is arranged in the pre-connection mechanism 2, the phenomenon that a long cable needs to be reserved for connection to cause cable waste when a traditional cable is connected can be avoided through the auxiliary on-off mechanism 3, meanwhile, the connection of a fault cable can be automatically cut off when a circuit is in fault and a fire disaster occurs through the auxiliary on-off mechanism 3, the fire disaster is prevented from spreading to a non-fault cable along a fault circuit, and the cable protection effect is effectively improved;

the auxiliary on-off mechanism 3 comprises an adjusting groove 301, an on-off sliding plate 302, a fixed sliding plate 303, a wiring sleeve 304, an elastic clamping piece 305, a sliding rod 306, a fastening spring 307, a multi-stage telescopic rod 308, a tension spring 309, a shielding telescopic hose 310, an electric connection plug 311, an insulating block 312, a telescopic limiting rod 313, a cut-off spring 314 and an insulating telescopic hose 315;

an on-off sliding plate 302 is slidably mounted on the inner side of the movable mounting seat 203, a fixed sliding plate 303 is slidably mounted on the inner side of the fixed mounting seat 214, adjusting grooves 301 are formed in the middle portions of the inner sides of the fixed mounting seat 214 and the movable mounting seat 203, and the on-off sliding plate 302 and the fixed sliding plate 303 are slidably mounted inside the adjusting grooves 301;

a plurality of wiring sleeves 304 are embedded into the side end faces of the on-off sliding plate 302 and the fixed sliding plate 303 at equal angles along the circumferential direction, elastic clamping pieces 305 are installed inside the wiring sleeves 304, a plurality of sliding rods 306 are embedded into the side end faces of the on-off sliding plate 302 and the fixed sliding plate 303 at equal angles along the circumferential direction in a sliding manner, and fastening springs 307 are sleeved outside the sliding rods 306;

the multi-stage telescopic rod 308 is installed on one side of the wiring sleeve 304, the tensioning spring 309 is sleeved on the outer side of the multi-stage telescopic rod 308, the shielding telescopic hose 310 is sleeved on the outer side of the tensioning spring 309, the power connection plug 311 is installed on the side end face of the shielding telescopic hose 310, the power connection plug 311 is connected with the wiring sleeve 304 through the multi-stage telescopic rod 308, the insulating blocks 312 are installed in the middle of the side end faces of the on-off sliding plate 302 and the fixed sliding plate 303, the telescopic limiting rod 313 is installed in the middle of the side end face of the insulating block 312, the cutting spring 314 is sleeved on the outer side of the telescopic limiting rod 313, the on-off sliding plate 302 is connected with the movable mounting seat 203 in a sliding mode through the sliding rod 306, the fixed sliding plate 303 is connected with the fixed mounting seat 214 in a sliding mode through the wiring sleeve 304 through the sliding rod 306, the multi-stage telescopic rod 308 is made of a conductive material, the power connection plug 311 is matched with the wiring sleeve 304 so that a large number of cables is reserved at the joint, waste of the cables is avoided, the maximum telescopic rod 308 is equal to the original length of the tensioning spring 309, the telescopic rod 313, the maximum telescopic length of the original length of the cutting spring 314 is equal to the original length of the cutting spring 314, the insulating telescopic rod 314, the elastic coefficient of the outer side of the insulating telescopic spring is timely cutting spring for isolating the insulating telescopic spring when a fire is broken spring, and the insulating hose is isolated.

The protection adjusting mechanism 4 is installed on the outer side of the pre-connecting mechanism 2, stable elastic supporting pressure can be provided for the auxiliary on-off mechanism 3 in the normal use process of the cable through the protection adjusting mechanism 4, the reliability of cable connection is guaranteed, when a circuit fault occurs, the elastic supporting pressure is timely removed, and the work of automatically cutting off the fault cable is realized in cooperation with the auxiliary on-off mechanism 3.

The protective adjusting mechanism 4 comprises a protective air bag 401, an air duct 402, a connecting box 403, a sub-clamping tube 404, a pneumatic box 405, a sliding plate 406, a push rod 407, a sealing ring 408, an air guide box 409, a sub-clamping tube 410, a pressure regulating box 411, a screw rod 412, a piston 413, a sealing shaft seat 414, a connecting air duct 415, a mounting groove 416, an air duct 417, an air supplementing tube 418 and an air supplementing nozzle 419;

a protective air bag 401 is embedded in the inner side of the outer sheath 201, air guide tubes 402 are symmetrically arranged on the side end face of the protective air bag 401, a connecting box 403 is arranged on the end portion of each air guide tube 402, a sub-clamping tube 404 is arranged in the middle of the side end face of the connecting box 403, an air supplement tube 418 is arranged on the side end face of the other side of the protective air bag 401, and an air supplement nozzle 419 is clamped on the end portion of the air supplement tube 418;

pneumatic boxes 405 are respectively installed at two sides of the movable installation seat 203 inside the connection protection shell 202, installation grooves 416 are formed in the connection protection shell 202 corresponding to the positions of the pneumatic boxes 405, sliding plates 406 are installed inside the pneumatic boxes 405 in a sliding mode, push rods 407 are installed in the middle of the side end faces of the sliding plates 406, the sliding plates 406 are connected with the linkage plate 212 through the push rods 407, sealing rings 408 are installed in the middle of the side end faces of the pneumatic boxes 405 in an embedded mode, the push rods 407 are connected with the pneumatic boxes 405 through the sealing rings 408, vent pipes 417 are installed in the middle of the side end faces of the pneumatic boxes 405, air guide boxes 409 are installed at the ends of the vent pipes 417, female clamping pipes 410 are installed in the middle of the side end faces of the air guide boxes 409, a plurality of sealing ring pads are evenly sleeved on the outer sides of the daughter clamping pipes 404 at equal intervals, a plurality of airtight pads are evenly sleeved on the outer sides of the sliding plates 406 at equal intervals, the inner walls of the female clamping pipes 410 are matched with the outer walls of the daughter clamping pipes 404, the capacity of the air guide boxes is equal to facilitate air pressure adjustment, and provide long-term stable pneumatic clamping force;

the side end face of the connection protection shell 202 is provided with a pressure regulating box 411 at one side of the mounting block 207, the middle part of the side end face of the pressure regulating box 411 is rotatably provided with a sealing shaft seat 414, the middle part of the sealing shaft seat 414 is rotatably provided with a screw rod 412, the outer side of the screw rod 412 is provided with a piston 413 through threads, the middle part of the side end face of the pressure regulating box 411 is provided with a connection air pipe 415, and the pressure regulating box 411 is connected with the air guide box 409 through the connection air pipe 415.

The working principle and the using process of the invention are as follows: when the cable is in actual use, firstly, the wire body 1 penetrates through the outer sheath 201, then, the wire head of the wire body 1 penetrates through the connecting protective shell 202, the end part of the wire 102 is clamped into the interior of the wiring sleeve 304 on the on-off sliding plate 302, under the elastic extrusion action of the elastic clamping piece 305, the wire 102 can be tightly connected with the wiring sleeve 304, the connection stability and convenience can be effectively improved, then, the inflation valve 219 on the clamping air bag ring 211 is connected with an external inflation device, the external inflation device conveys inert gas into the clamping air bag ring 211 through the inflation pipe 218, the clamping air bag ring 211 is inflated and expanded, the tensile outer sleeve 112 is extruded, the part of the wire body 1 extending into the inner side of the connecting protective shell 202 is clamped and fixed, the connection reliability is further improved, and the wire body 1 can be stably connected with the movable mounting seat 203;

then, another section of the wire body 1 passes through another outer sheath 201, then, the wire head of the wire body 1 is inserted into the connecting protective shell 202, so that the end part of the wire 102 is clamped into the wiring sleeve 304 on the fixed sliding plate 303, the wire 102 is tightly connected with the wiring sleeve 304 under the elastic extrusion action of the elastic clamping piece 305, then, the inflation valve 219 on the fixed air bag ring 216 is connected with an external inflation device, the external inflation device conveys inert gas into the fixed air bag ring 216 through the inflation tube 218, the fixed air bag ring 216 is inflated and expanded, the tensile outer sleeve 112 is extruded, and the part of the other section of the wire body 1 extending into the connecting protective shell 202 is clamped and fixed, so that the other section of the wire body can be stably connected with the fixed mounting seat 214;

then, the screw 208 is rotated, the screw 208 drives the driving block 210 through threads to slide along the limiting rod 209, the driving block 210 can abut against the driving rod 204 in a sliding manner, so that the driving rod 204 slides towards the direction close to the fixed mounting seat 214 under the guiding action of the guiding block 205, further, the driving rod 204 can drive the movable mounting seat 203 to synchronously displace, and the movable mounting seat 203 displaces, so that the on-off sliding plate 302 can be driven to displace, the on-off sliding plate 302 can drive the multi-stage telescopic rod 308 to displace, further, the electric plug 311 can be driven to displace, finally, the distance between the on-off sliding plate 302 and the fixed sliding plate 303 is shortened, the tensioning spring 309 is extruded, under the elastic force action of the tensioning spring 309, the electric plug 311 can be inserted into the wiring sleeve 304 on the fixed sliding plate 303, the quick connection between the two wire bodies 1 can be realized, the accurate alignment can be realized, the connection convenience is effectively improved, and the protection effect on the joint is enhanced;

in the connection process, the on-off sliding plate 302 can slide in the movable mounting seat 203, and the fixed sliding plate 303 can slide in the fixed mounting seat 214, so that the elastic force of the fastening spring 307 can be effectively utilized, the connection stability between the wire body 1 and the wiring sleeve 304 and between the wiring sleeve 304 and the power connection plug 311 can be further improved, and the scalability of the multi-stage telescopic rod 308 can avoid the waste phenomenon caused by the fact that a longer cable is reserved due to the fact that the reserved length at the joint of the wire body 1 is not enough in the traditional connection process when the wire body 1 is connected;

after the connection work of the wire body 1 is completed, the outer sheath 201 is moved, the outer sheath 201 is butted with the connecting protective shell 202, meanwhile, the sub-clamping tube 404 is clamped into the main clamping tube 410, the outer sheath 201 and the connecting protective shell 202 are fixed through bolts, then, the air supplement nozzle 419 is connected with external inflation equipment, an external inflation device is used for inflating inert gas into the protective air bag 401 through the air supplement tube 418, the inert gas entering the protective air bag 401 enters the connecting box 403 through the air duct 402, then enters the main clamping tube 410 through the sub-clamping tube 404, then enters the air guide box 409 through the main clamping tube 410, part of the inert gas entering the air guide box 409 enters the pressure regulating air box 411 through the connecting air duct 415, and the other part of the inert gas enters the pneumatic box 405 through the air duct 417;

when the interior of the protective airbag 401 is filled with inert gas, the protective airbag 401 inflates and expands, so that the protective airbag 401 extrudes the tensile outer sleeve 112 with a proper elastic force, the wire body 1 is tightly connected with the outer sheath 201, the inert gas in the pneumatic box 405 butts against the sliding plate 406 with a proper pressure, the air supplementing nozzle 419 is disconnected from the external inflation equipment, the gas transmission is stopped, then the screw 208 is rotated, the screw 208 drives the driving block 210 through threads, the driving block 210 slides along the limiting rod 209, the driving block 210 is separated from the driving rod 204, and the driving block 210 is reset;

after the driving block 210 is reset, the movable mounting seat 203 is kept in the original position under the action of the airflow pressure of the inert gas in the pneumatic box 405, if the movable mounting seat 203 displaces, the screw rod 412 is rotated, the screw rod 412 drives the piston 413 to displace through threads, the piston 413 compresses the inert gas in the pressure regulating box 411, the inert gas in the pressure regulating box 411 enters the gas guide box 409 through the connecting air pipe 415 and then enters the pneumatic box 405 through the vent pipe 417, the air pressure in the pneumatic box 405 increases due to the increase of the inert gas in the pneumatic box 405, under the action of the air pressure, the air flow pushes the sliding plate 406 to displace, the sliding plate 406 drives the push rod 407 to displace, the push rod 407 pushes the linkage plate 212 to displace, the linkage plate 212 drives the movable mounting seat 203 to displace, the adjusting pointer 213 and the movable mounting seat 203 synchronously displace, the scale plate 222 is used for observation, when the distance between the adjusting pointer 213 and the original pointer 217 is restored to the distance before the driving block 210 is reset, the rotation of the screw rod 412 is stopped, at this time, the distance between the adjusting pointer 213 and the pneumatic box 405 is connected with the plug of the pneumatic box 304, and the plug for stably compressing the spring 311, and the plug for compressing the inert gas;

when a cable fails or a certain section of cable catches fire, inert gas inside the protective airbag 401 can leak, the inert gas can prevent fire from burning, meanwhile, the inert gas inside the protective airbag 401 leaks, so that the inert gas inside the pneumatic box 405 can flow into the protective airbag 401 and finally can be completely leaked out, along with the outflow of the inert gas inside the pneumatic box 405, the air pressure inside the pneumatic box 405 can be continuously reduced, the push rod 407 does not have enough force to counteract the compression elastic force between the tension spring 309 and the cut-off spring 314, under the action of the compression elastic force of the cut-off spring 314, the on-off sliding plate 302 can be pushed to be away from the fixed sliding plate 303, as the elastic coefficient of the cut-off spring 314 is larger than that of the tension spring 309 and the original length of the cut-off spring 314 is larger than that of the tension spring 309, the connection plug 311 can finally be separated from the connection sleeve 304 by the electric connector, the connection between a faulty cable and a normal cable can be automatically disconnected in time, and the damage to the non-faulty cable can be avoided.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a multilayer coextrusion type insulating crosslinked flame retarded cable, includes the line body (1), its characterized in that: a pre-connecting mechanism (2) is arranged on the outer side of the wire body (1);

the pre-connection mechanism (2) comprises an outer sheath (201);

a connecting protective shell (202) is arranged on one side of the outer sheath (201), a movable mounting seat (203) is arranged inside the connecting protective shell (202), a clamping air bag ring (211) is mounted on one side of the movable mounting seat (203), and a linkage plate (212) and an adjusting pointer (213) are mounted on the outer side of the movable mounting seat (203);

a driving rod (204) is installed on the other side of the movable installation seat (203), a guide block (205) is installed on the outer surface of the driving rod (204), and a sliding groove (221) is formed in the end face of the side of the connecting protection shell (202);

an installation block (207) is installed on the end face of the side of the connection protection shell (202), a rotating shaft seat (223) is installed on the end face of the side of the installation block (207), a screw rod (208) is installed on the end face of the side of the rotating shaft seat (223), a limiting rod (209) is installed on the end face of the side of the installation block (207), and a driving block (210) is installed on the outer side of the screw rod (208);

connect protective housing (202) internally mounted have fixed mounting seat (214), fixed gasbag circle (216) are installed to fixed mounting seat (214) one side terminal surface, original pointer (217) are installed to fixed mounting seat (214) curved surface one side.

2. The multi-layer co-extrusion insulation cross-linking flame-retardant cable as claimed in claim 1, wherein the outer curved surface of the fixed mounting seat (214) is symmetrically provided with mounting rods (215), and the fixed mounting seat (214) is connected with the connecting protective shell (202) through the mounting rods (215);

the middle part of the bottom end of the driving block (210) is provided with a ball (220) in a rolling way;

the middle parts of the end faces on the two sides of the guide block (205) are uniformly and rollingly provided with a plurality of grinding balls (206) at equal intervals, and the sliding groove (221) is formed in the middle part of the end face on the side of the connecting protective shell (202) and corresponds to the position of the guide block (205);

the middle parts of the curved surfaces of the clamping air bag ring (211) and the fixed air bag ring (216) are respectively provided with an inflation tube (218);

an inflation valve (219) is clamped at the end part of the inflation tube (218), and a scale plate (222) is arranged in the middle of the end surface of the outer side of the connecting protective shell (202) corresponding to the original pointer (217).

3. A multilayer, co-extruded, insulated, cross-linked flame retardant cable according to claim 1, characterized in that the wire body (1) comprises an insulating mat (101);

an insulating pad (101) is embedded in the middle of the wire body (1), a plurality of wires (102) are embedded in the edge of the side end face of the insulating pad (101) at equal angles along the circumferential direction, a shielding net (103) is sleeved on the outer side of each wire (102), and reinforcing ribs (104) are embedded in the middle of the side end face of the insulating pad (101);

the insulation structure is characterized in that a heat-conducting silica gel sleeve (105) is sleeved on the outer side of the insulation pad (101), heat-conducting silicone grease (106) is filled in the outer side of the heat-conducting silica gel sleeve (105), a heat insulation pad (107) is installed on the outer side of the heat-conducting silicone grease (106), a buffer air bag (108) is glued on the outer side of the heat insulation pad (107), a co-extrusion sheath (109) is installed on the outer side of the buffer air bag (108), an alkali-free glass fiber net (110) is installed on the outer side of the co-extrusion sheath (109), a reinforcing net (111) is sleeved on the outer side of the alkali-free glass fiber net (110), and a tensile outer sleeve (112) is installed on the outer side of the reinforcing net (111); an outer sheath (201) is installed on the outer side of the tensile outer sheath (112).

4. A multi-layer co-extruded insulated cross-linked flame retardant cable according to claim 1, wherein the pre-connection mechanism (2) is internally provided with an auxiliary on-off mechanism (3);

the auxiliary on-off mechanism (3) comprises an adjusting groove (301);

an on-off sliding plate (302) is slidably mounted on the inner side of the movable mounting seat (203), a fixed sliding plate (303) is slidably mounted on the inner side of the fixed mounting seat (214), adjusting grooves (301) are formed in the middle parts of the inner sides of the fixed mounting seat (214) and the movable mounting seat (203), and the on-off sliding plate (302) and the fixed sliding plate (303) are slidably mounted in the adjusting grooves (301);

a plurality of wiring sleeves (304) are embedded into the side end faces of the on-off sliding plate (302) and the fixed sliding plate (303) at equal angles along the circumferential direction, elastic clamping pieces (305) are installed on the inner sides of the wiring sleeves (304), a plurality of sliding rods (306) are embedded into the side end faces of the on-off sliding plate (302) and the fixed sliding plate (303) at equal angles along the circumferential direction in a sliding mode, and fastening springs (307) are sleeved on the outer sides of the sliding rods (306);

the utility model discloses a connector, including wiring sleeve (304), coupling sleeve (304), multistage telescopic link (308), tensioning spring (309) have been cup jointed in the multistage telescopic link (308) outside, shielding expansion hose (310) have been cup jointed in the tensioning spring (309) outside, shielding expansion hose (310) side end face is installed and is connect electric plug (311), connect electric plug (311) to be connected with coupling sleeve (304) through multistage telescopic link (308), insulating block (312) are all installed in break-make slide (302) and fixed slide (303) side end face middle part, insulating block (312) side end face mid-mounting has flexible gag lever post (313), cutting spring (314) have been cup jointed in flexible gag lever post (313) outside, insulating expansion hose (315) have been cup jointed in cutting spring (314) outside.

5. A multi-layer co-extruded insulation cross-linking flame-retardant cable according to claim 1, characterized in that the pre-connection mechanism (2) is provided with a protective adjusting mechanism (4) at the outer side;

the protection adjusting mechanism (4) comprises a protection air bag (401);

a protective air bag (401) is embedded into the inner side of the outer sheath (201), air guide pipes (402) are symmetrically arranged on the side end face edge of the protective air bag (401), a connecting box (403) is arranged at the end part of each air guide pipe (402), a sub-clamping pipe (404) is arranged in the middle of the side end face of the connecting box (403), an air supplementing pipe (418) is arranged on the side end face edge of the other side of the protective air bag (401), and an air supplementing nozzle (419) is clamped on the end part of the air supplementing pipe (418);

pneumatic boxes (405) are installed at positions, located on two sides of a movable installation seat (203), inside the connection protection shell (202), mounting grooves (416) are formed in the position, corresponding to the pneumatic boxes (405), inside the connection protection shell (202), sliding plates (406) are installed in the pneumatic boxes (405) in a sliding mode, push rods (407) are installed in the middle of the side end faces of the sliding plates (406), the sliding plates (406) are connected with linkage plates (212) through the push rods (407), sealing rings (408) are installed in the middle of the end face of one side of each pneumatic box (405) in an embedded mode, the push rods (407) are connected with the pneumatic boxes (405) through the sealing rings (408), vent pipes (417) are installed in the middle of the end face of the other side of each pneumatic box (405), air guide boxes (409) are installed at the ends of the vent pipes (417), and mother clamping pipes (410) are installed in the middle of the end face of each air guide box (409);

connect protective case (202) side end face and be located installation piece (207) one side position department and install pressure regulating gas box (411), pressure regulating gas box (411) side end face mid rotation installs sealed axle bed (414), lead screw (412) are installed in sealed axle bed (414) mid rotation, piston (413) are installed through the screw thread in lead screw (412) outside, pressure regulating gas box (411) side end face mid mounting has and connects gas-supply pipe (415), pressure regulating gas box (411) are connected with air guide box (409) through connecting gas-supply pipe (415).

6. The multilayer co-extrusion insulation cross-linking flame-retardant cable according to claim 2, wherein the sliding groove (221) is cross-shaped, the sliding groove (221) is matched with the guide block (205), an arc-shaped clamping groove is formed in the end face of the driving block (210) at the position corresponding to the driving rod (204), the driving block (210) is connected with the limiting rod (209) in a sliding manner, and the scale plate (222) is made of a transparent material.

7. The multi-layer co-extrusion insulation cross-linking flame-retardant cable according to claim 4, wherein the on-off sliding plate (302) is slidably connected with the movable mounting seat (203) through a sliding rod (306), the fixed sliding plate (303) is slidably connected with the fixed mounting seat (214) through a sliding rod (306), the on-off sliding plate (302) and the fixed sliding plate (303) are both penetrated through by a wiring sleeve (304), the multi-stage telescopic rod (308) is made of a conductive material, and the electric connection plug (311) is engaged with the wiring sleeve (304).

8. The multi-layer co-extrusion insulated cross-linked flame retardant cable according to claim 4, wherein the maximum expansion amount of the multi-stage expansion rod (308) is equal to the original length of the tension spring (309), the maximum expansion amount of the expansion limiting rod (313) is equal to the original length of the cut-off spring (314), the original length of the cut-off spring (314) is greater than the original length of the tension spring (309), and the elastic coefficient of the cut-off spring (314) is greater than the elastic coefficient of the tension spring (309).

9. The multi-layer co-extrusion insulation cross-linking flame-retardant cable as claimed in claim 5, wherein a plurality of sealing gaskets are uniformly sleeved on the outer side of the sub-clamping tube (404) at equal intervals, a plurality of airtight gaskets are uniformly sleeved on the outer side of the sliding plate (406) at equal intervals, the inner wall of the main clamping tube (410) is matched with the outer wall of the sub-clamping tube (404), and the volume of the air guide box (409) is equal to the sum of the volumes of the two pneumatic boxes (405).