阅读说明：本技术 一种快速升温的加热电缆 (Heating cable capable of rapidly heating ) 是由 黄小来 于 2021-06-07 设计创作，主要内容包括：本发明涉及电缆技术领域,特别涉及一种快速升温的加热电缆,包括发热丝,所述发热丝的外部设置有第一粘接层,所述的发热丝绕包在一快速升温结构上,所述的快速升温结构包括第一母线和第二母线,所述第一母线和第二母线之间均匀挤包一PTC材料层,所述PTC材料层外包覆有隔离层；本发明中,该快速升温结构包括两根母线和挤包在两母线之间的PTC材料层,在具体使用时,加热电缆一端的两根母线与电源接通,电流从一根母线横向流过PTC材料层到达另一根母线,将电能转换成热能,配合发热丝对加热电缆进行快速升温,当温度升高之后,PTC材料层的电阻增大,到了高阻区,电阻大到几乎阻断电流,此时PTC材料层不再发热,仅有发热丝持续产生热量对外部进行加热。(The invention relates to the technical field of cables, in particular to a heating cable capable of quickly raising temperature, which comprises a heating wire, wherein a first bonding layer is arranged outside the heating wire, the heating wire is wrapped on a quick temperature raising structure, the quick temperature raising structure comprises a first bus and a second bus, a PTC material layer is uniformly extruded between the first bus and the second bus, and an isolation layer is wrapped outside the PTC material layer; when the temperature rises, the resistance of the PTC material layer increases to a high resistance area, the resistance is so large as to almost block the current, at the moment, the PTC material layer does not generate heat, and only the heating wire continuously generates heat to heat the outside.)

1. A heating cable capable of rapidly heating comprises a heating wire (1) and is characterized in that a first bonding layer (6) is arranged outside the heating wire (1), a second bonding layer (8) is arranged outside the first bonding layer (6), a fastening structure (7) is arranged between the first bonding layer (6) and the second bonding layer (8), a third bonding layer (10) is arranged outside the second bonding layer (8), a protective structure (9) is arranged between the second bonding layer (8) and the third bonding layer (10), a fourth bonding layer (12) is arranged on one side of the third bonding layer (10), an installation structure (11) is arranged between the third bonding layer (10) and the fourth bonding layer (12), and a telescopic structure (13) is arranged on one side of the fourth bonding layer (12);

the heating wire (1) is wrapped on a rapid heating structure (14), the rapid heating structure (14) comprises a first bus (141) and a second bus (142) which are arranged at intervals in parallel, a PTC material layer (143) is evenly extruded between the first bus (141) and the second bus (142), and an isolation layer (144) is coated outside the PTC material layer (143).

2. A rapid heating cable according to claim 1, wherein a rapid heating structure is provided between the heating wire (1) and the first adhesive layer (6);

the rapid heating structure comprises a mica tape (2), wherein the mica tape (2) is arranged outside the heating wire (1), an insulating layer (3) is arranged on the inner wall of the mica tape (2), silicon rubber (4) is arranged inside the insulating layer (3), and a shielding layer (5) is arranged inside the silicon rubber (4).

3. The rapid heating cable according to claim 2, wherein the heating wire (1) is formed by twisting a plurality of groups of nichrome wires, the insulating layer (3) is internally provided with high temperature resistant magnesium oxide, and the shielding layer (5) is made of an aluminum alloy shielding sheet.

4. The heating cable capable of rapidly increasing the temperature according to claim 1, wherein the fastening structure (7) is composed of a polyethylene rubber sleeve (701), a waterproof layer (702), reinforcing ribs (703), an explosion-proof sleeve (704) and saw teeth (705), the explosion-proof sleeve (704) is sleeved outside the mica tape (2), the reinforcing ribs (703) are arranged outside the explosion-proof sleeve (704), the waterproof layer (702) is coated outside the reinforcing ribs (703), the polyethylene rubber sleeve (701) is sleeved outside the waterproof layer (702), the saw teeth (705) are arranged inside the reinforcing ribs (703) and outside the explosion-proof sleeve (704), and the reinforcing ribs (703) and the explosion-proof sleeve (704) are fixed by the saw teeth (705) in a clamping manner.

5. A fast heating cable according to claim 4, characterized in that the waterproof layer (702) is internally filled with waterproof film, the section of the sawtooth (705) is parallelogram-shaped, and the sawtooth (705) is distributed in the direction opposite to the distribution direction of the sawtooth (705) on the outer side of the explosion-proof sleeve (704) inside the reinforcing rib (703).

6. The rapid heating cable according to claim 1, wherein the protective structure (9) is composed of a stainless steel sleeve (901), an outer groove (902), an outer flange (903) and a metal braided wire (904), the stainless steel sleeve (901) is arranged outside the second adhesive layer (8), seven groups of outer grooves (902) and outer flanges (903) are arranged on the inner wall of the stainless steel sleeve (901), the outer grooves (902) and the outer flanges (903) are distributed on the inner wall of the stainless steel sleeve (901) in a staggered manner, and the metal braided wire (904) is arranged inside the outer groove (902).

7. A fast heating cable according to claim 6, characterized in that the outer grooves (902) are provided with seven groups and are annularly distributed about the inner centre of the stainless steel jacket (901).

8. The heating cable capable of rapidly increasing the temperature according to claim 1, wherein the mounting structure (11) comprises a female connector (1101), a clamping groove (1102), clamping blocks (1103), elastic clamping strips (1104) and a male connector (1105), the female connector (1101) is arranged on one side of the third adhesive layer (10), the male connector (1105) is fixedly connected to one side of the female connector (1101), four groups of clamping grooves (1102) are arranged around the female connector (1101), four groups of elastic clamping strips (1104) are arranged around the male connector (1105), and the clamping blocks (1103) are respectively arranged on the inner sides of the elastic clamping strips (1104).

9. The heating cable capable of rapidly increasing the temperature according to claim 8, wherein the locking block (1103) is fastened inside the locking groove (1102), the inner side of the male connector (1105) is provided with an external thread, the inner side of the female connector (1101) is provided with an internal thread, and the female connector (1101) and the male connector (1105) are in threaded connection.

10. The rapid heating cable according to claim 1, wherein the telescopic structure (13) is composed of an inner telescopic sleeve (1301), an outer telescopic sleeve (1302), a fixed sleeve (1303), a sliding groove (1304) and a sliding block (1305), the inner telescopic sleeve (1301) is fixedly connected to one side of the fourth adhesive layer (12), the outer telescopic sleeve (1302) is sleeved outside the inner telescopic sleeve (1301), the fixed sleeve (1303) is sleeved outside the outer telescopic sleeve (1302), the sliding groove (1304) is arranged on the inner walls of the outer telescopic sleeve (1302) and the fixed sleeve (1303), and the sliding block (1305) is arranged at the edge of the inner wall of the inner telescopic sleeve (1301) and the outer telescopic sleeve (1302) and is respectively embedded inside the sliding groove (1304) and is in sliding connection with the sliding groove (1304).

Technical Field

The invention relates to the technical field of cables, in particular to a heating cable capable of rapidly increasing temperature.

Background

Heating cable is the cable of the inside heating wire intensification heating of accessible in order to realize heat conduction effect, in the production life, the construction building, equipment manufacturing, field such as house ornamentation heating has all had wide application, traditional heating cable uses the alloy heater as the heat source more on the market, the heat-resisting scope of intensification is different, but all more or less exist the heat conduction inefficiency, easily receive electromagnetic pollution, waterproof explosion-proof performance is not good, easy wearing and tearing, defects such as maintenance inconvenience, a novel heating cable is proposed herein, improve life through improving inner structure, improve heat conduction efficiency.

In the process of implementing the invention, the inventor finds that at least the following problems in the prior art are not solved: (1) the traditional heating cable is low in heat conductivity, easy to be polluted by electromagnetism and unstable in physical property in a heat conduction state; (2) the traditional heating cable has low compressive strength and poor waterproof and explosion-proof performance, and is easy to be corroded and damaged after long-term use; (3) the traditional heating cable has the defects of insufficient external toughness, poor wear resistance, low mechanical strength and easy cracking caused by external force; (4) the traditional heating cable power supply joint is fastened with a plug by using screws, so that the connection stability is not strong, and later maintenance and overhaul are not convenient; (5) the power supply joint of the traditional heating cable has no special protection, is easy to damage due to bending and is easy to have poor contact; (6) the conventional heating cable has a slow temperature rise rate and needs a long time to reach the target temperature.

Disclosure of Invention

The invention aims to provide a heating cable capable of rapidly increasing the temperature, so as to solve the problem that the traditional heating cable in the background art is slow in temperature increasing speed and needs a long time to reach the target temperature.

In order to achieve the purpose, the invention adopts the following technical scheme:

a heating cable capable of rapidly increasing temperature comprises a heating wire, wherein a first bonding layer is arranged outside the heating wire, a second bonding layer is arranged outside the first bonding layer, a fastening structure is arranged between the first bonding layer and the second bonding layer, a third bonding layer is arranged outside the second bonding layer, a protective structure is arranged between the second bonding layer and the third bonding layer, a fourth bonding layer is arranged on one side of the third bonding layer, an installation structure is arranged between the third bonding layer and the fourth bonding layer, and a telescopic structure is arranged on one side of the fourth bonding layer;

the heating wire is wrapped on a rapid heating structure, the rapid heating structure comprises a first bus and a second bus which are arranged at intervals in parallel, a PTC material layer is evenly extruded between the first bus and the second bus, and an isolation layer is coated outside the PTC material layer.

Preferably, a rapid heating structure is arranged between the heating wire and the first bonding layer;

the rapid heating structure comprises a mica tape, the mica tape is arranged outside the heating wire, an insulating layer is arranged on the inner wall of the mica tape, silicon rubber is arranged inside the insulating layer, and a shielding layer is arranged inside the silicon rubber.

Preferably, the heating wire is formed by twisting a plurality of groups of nichrome wires, the insulating layer is internally provided with high-temperature-resistant magnesium oxide, and the shielding layer is made of an aluminum alloy shielding sheet.

Preferably, fastening structure comprises polyethylene gum cover, waterproof layer, strengthening rib, explosion-proof sleeve pipe and sawtooth, explosion-proof sleeve pipe cup joints in the outside of mica tape, explosion-proof sleeve pipe's outside is provided with the strengthening rib, the outside coating of strengthening rib has the waterproof layer, the polyethylene gum cover has been cup jointed to the outside of waterproof layer, the inside of strengthening rib and explosion-proof sleeve pipe's outside are provided with the sawtooth, strengthening rib and explosion-proof sleeve pipe pass through the sawtooth joint and fix.

Preferably, the waterproof layer is filled with a waterproof film, the cross section of each sawtooth is a parallelogram, and the distribution direction of the sawteeth on the inner side of each reinforcing rib is opposite to that of the sawteeth on the outer side of the explosion-proof sleeve.

Preferably, the protective structure comprises a stainless steel sleeve, an outer groove, an outer flange and a metal braided wire, the stainless steel sleeve is arranged outside the second bonding layer, seven groups of outer grooves and outer flanges are arranged on the inner wall of the stainless steel sleeve, the outer grooves and the outer flanges are distributed on the inner wall of the stainless steel sleeve in a staggered mode, and the metal braided wire is arranged inside the outer groove.

Preferably, the outer grooves are provided with seven groups and are annularly distributed about an inner center of the stainless steel sleeve.

Preferably, mounting structure comprises female connector, draw-in groove, fixture block, elasticity card strip and public connector, female connector sets up in one side of third adhesive linkage, one side fixedly connected with public connector of female connector, be provided with four group's draw-in grooves around the female connector, be provided with four group's elasticity card strips around the public connector, the inboard of elasticity card strip is provided with the fixture block respectively.

Preferably, the fixture block lock joint is in the inside of draw-in groove, the inboard of public connector is provided with the external screw thread, the inside of female connector is provided with the internal thread, female connector and public connector are threaded connection.

Preferably, the telescopic structure is composed of an inner telescopic sleeve, an outer telescopic sleeve, a fixed sleeve, a sliding groove and a sliding block, the inner telescopic sleeve is fixedly connected to one side of the fourth bonding layer, the outer telescopic sleeve is sleeved outside the inner telescopic sleeve, the fixed sleeve is sleeved outside the outer telescopic sleeve, the sliding grooves are formed in the inner walls of the outer telescopic sleeve and the fixed sleeve, the sliding block is arranged at the edge of the inner wall of the inner telescopic sleeve and the edge of the inner wall of the outer telescopic sleeve, and the sliding block is embedded in the sliding groove and is in sliding connection with the sliding groove.

Compared with the prior art, the invention has the following technical effects:

1. the heating cable capable of rapidly heating up provided by the invention is characterized in that a heating wire is wrapped on a rapid heating up structure, the rapid heating up structure comprises two buses and a PTC material layer extruded between the two buses, when the heating cable is used specifically, the two buses at one end of the heating cable are connected with a power supply, current flows from one bus to the other bus through the PTC material layer transversely, electric energy is converted into heat energy, the heating wire is matched to rapidly heat up the whole heating cable, after the temperature rises, the resistance of the PTC material layer is increased to a high resistance area, the resistance is almost blocked, the PTC material layer does not heat up at the moment, and only the heating wire continuously generates heat to heat the outside. According to the invention, the existing electric heating belt principle is combined into the heating cable based on the heating wire, so that the rapid heating is realized at the initial stage of the use of the heating cable, and when the specified temperature is reached, the rapid heating structure can automatically block the passing of current; particularly, when the heating cable meets the sudden drop of the external environment temperature, the heat produced by the heating wire is not enough to maintain the heat preservation requirement, and the internal quick heating structure automatically starts to work.

2. The heating cable capable of rapidly heating provided by the invention realizes safe and efficient heat conduction, improves the compressive strength, realizes wear resistance and strong tensile strength, realizes double fixation, and realizes bending resistance and joint protection; the heating wire is twisted by adopting nickel-chromium alloy to be used as a heating source, the high-temperature-resistant magnesium oxide is arranged in the insulating layer to prevent high-temperature heating from burning out an external package, heat is blocked in the mica tape, the high-temperature resistance and the combustion resistance are strong, toxic smoke cannot be released or volatilized at a high-temperature state, the influence of an external electromagnetic field on the operation of the cable can be reduced by the shielding layer, the outward radiation of electromagnetic waves of the cable is prevented, the external interference is reduced, the physical properties of each internal element are stable at the high-temperature state, the loss rate is low, and quick and efficient heat conduction is realized;

3. according to the invention, by arranging the polyethylene rubber sleeve, the waterproof layer, the reinforcing ribs, the explosion-proof sleeve and the sawteeth, the cable is different from a common heating cable on the market which is directly packaged outside a mica tape, the polyethylene rubber sleeve is sleeved outside the mica tape of the heating cable in a whole line, the output end and the input end of the mica tape always penetrate through the explosion-proof sleeve, the explosion-proof sleeve and the reinforcing ribs are firmly fixed through the sawteeth, the explosion-proof sleeve and the reinforcing ribs always keep the same direction regardless of turning and pulling inside and outside, the mica tape cannot be loosened and stranded inside the polyethylene rubber sleeve, the reinforcing ribs enhance the overall compressive strength of the cable and are not easy to deform, the waterproof layer and the explosion-proof sleeve improve the waterproof and explosion-proof performance of the cable, and the fire oil, gas and the like cannot invade from the outside and cannot corrode after long-term use;

4. according to the cable, the stainless steel sleeve, the outer groove, the outer flange and the metal braided wire are arranged, the stainless steel sleeve is bonded outside the polyethylene rubber sleeve through the second bonding layer, the outer groove and the outer flange are arranged outside the stainless steel sleeve in a staggered mode, the metal braided wire is arranged inside the outer groove, the metal braided wire enables the outer surface of the stainless steel sleeve to keep round and simultaneously disperse pressure, toughness is improved, the metal braided wire is not prone to fracture due to the material characteristics when being pulled by external force, the internal heating wire is protected from fracture, the abrasion resistance is high, the cable is not prone to damage due to friction with a rough surface or a ground surface, the integral mechanical strength of the cable is improved, and the service life of the cable in an outdoor severe environment can be effectively guaranteed;

5. according to the invention, the cable is provided with the female connector, the clamping groove, the clamping block, the elastic clamping strip and the male connector, the length of the cable can be customized according to actual needs, the mounting structure is arranged at the joint of the cable and the power plug, the female connector and the male connector form threaded connection with external threads through internal threads, the clamping groove and the clamping block form clamping connection, the double connection stability is stronger, the cable cannot be separated by bidirectional pulling and twisting, the elastic clamping strip is pulled outwards to separate the clamping block from the clamping groove when the connection is required to be released, then the threaded connection can be released by unscrewing, the fastening is realized from four directions without screws, and the later-period maintenance and repair are convenient;

6. according to the invention, the inner telescopic sleeve, the outer telescopic sleeve, the fixed sleeve, the sliding chute and the sliding block are arranged, the fixed sleeve is arranged at the input end of the cable, namely the power supply connector, the fixed sleeve is directly bonded and fixed with the mica tape, the outer telescopic sleeve in the fixed sleeve can be drawn out towards two sides, the sliding block slides in the sliding chute to keep the smooth drawing out, the inner telescopic sleeve can be drawn out from the outer telescopic sleeve in the same way, the input end of the cable is coated by the fixed sleeve from the outside to form protection after being drawn out, and the inner telescopic sleeve, the outer telescopic sleeve and the fixed sleeve are elastically bendable, so that the cable is prevented from being cracked or not contacted well due to a large bending angle between the inner telescopic sleeve, the outer telescopic sleeve and the fixed sleeve when the plug is plugged on the socket, and a certain guiding and protecting effect is achieved.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

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

FIG. 2 is an enlarged schematic view of position A of FIG. 1;

FIG. 3 is a front view of the fastening structure of the present invention;

FIG. 4 is a schematic side view of the protective structure of the present invention;

FIG. 5 is a front view of the mounting structure of the present invention;

FIG. 6 is a schematic front sectional view of the telescopic structure of the present invention;

fig. 7 is a side view of the telescoping structure of the present invention.

In the figure: 1. a heater; 2. mica tapes; 3. an insulating layer; 4. silicone rubber; 5. a shielding layer; 6. a first adhesive layer; 7. a fastening structure; 701. polyethylene rubber sleeves; 702. a waterproof layer; 703. reinforcing ribs; 704. an explosion-proof sleeve; 705. saw teeth; 8. a second adhesive layer; 9. a protective structure; 901. a stainless steel sleeve; 902. an outer groove; 903. an outer flange; 904. metal braided wires; 10. a third adhesive layer; 11. a mounting structure; 1101. a female connector; 1102. a card slot; 1103. a clamping block; 1104. an elastic clamping strip; 1105. a male connector; 12. a fourth adhesive layer; 13. a telescopic structure; 1301. an inner telescoping tube; 1302. an outer telescoping tube; 1303. fixing the sleeve; 1304. a chute; 1305. a slider; 14. a rapid heating structure; 141. a first bus bar; 142. a second bus bar; 143. a layer of PTC material; 144. an isolation layer.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further clarified by combining the specific drawings.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1: with reference to fig. 1 and 2, the invention provides a heating cable capable of rapidly increasing temperature, which comprises a heating wire 1, wherein a first bonding layer 6 is arranged outside the heating wire 1, a second bonding layer 8 is arranged outside the first bonding layer 6, a fastening structure 7 is arranged between the first bonding layer 6 and the second bonding layer 8, a third bonding layer 10 is arranged outside the second bonding layer 8, a protective structure 9 is arranged between the second bonding layer 8 and the third bonding layer 10, a fourth bonding layer 12 is arranged on one side of the third bonding layer 10, an installation structure 11 is arranged between the third bonding layer 10 and the fourth bonding layer 12, and a telescopic structure 13 is arranged on one side of the fourth bonding layer 12;

the heating wire 1 is wrapped on a rapid heating structure 14, the rapid heating structure 14 comprises a first bus 141 and a second bus 142 which are arranged in parallel at intervals, a PTC material layer 143 is evenly extruded between the first bus 141 and the second bus 142, and an isolation layer 144 is coated outside the PTC material layer 143.

According to the invention, the heating wire 1 is wrapped on the rapid heating structure 14, the rapid heating structure 14 comprises two buses and the PTC material layer 143 extruded between the two buses, when the rapid heating structure is used specifically, the two buses at one end of the heating cable are connected with a power supply, current flows from one bus transversely through the PTC material layer 143 to the other bus, electric energy is converted into heat energy, the whole heating cable is rapidly heated by matching with the heating wire 1, after the temperature is raised, the resistance of the PTC material layer 143 is increased to a high resistance area, the resistance is large enough to almost block the current, at the moment, the PTC material layer 143 does not heat any more, and only the heating wire 1 continuously generates heat to heat the outside. The invention combines the existing electric heating belt principle into the heating cable based on the heating wire 1, realizes the rapid heating at the initial stage of the use of the heating cable, and when reaching the specified temperature, the rapid heating structure 14 can automatically block the passing of the current; particularly, when the heating cable meets the sudden drop of the external environment temperature, the heat produced by the heating wire is not enough to maintain the heat preservation requirement, and the internal quick heating structure automatically starts to work.

Example 2: referring to fig. 1-7, a heating cable includes a heating wire 1 and a first adhesive layer 6, the first adhesive layer 6 is disposed outside the heating wire 1, a second adhesive layer 8 is disposed outside the first adhesive layer 6, a fastening structure 7 is disposed between the first adhesive layer 6 and the second adhesive layer 8, a third adhesive layer 10 is disposed outside the second adhesive layer 8, a protective structure 9 is disposed between the second adhesive layer 8 and the third adhesive layer 10, a fourth adhesive layer 12 is disposed on one side of the third adhesive layer 10, an installation structure 11 is disposed between the third adhesive layer 10 and the fourth adhesive layer 12, a telescopic structure 13 is disposed on one side of the fourth adhesive layer 12, and a rapid heating structure is disposed between the heating wire 1 and the first adhesive layer 6;

referring to fig. 1-7, the heating cable further comprises a rapid heating structure, the rapid heating structure comprises a mica tape 2, the mica tape 2 is arranged outside the heating wire 1, an insulating layer 3 is arranged on the inner wall of the mica tape 2, silicon rubber 4 is arranged inside the insulating layer 3, and a shielding layer 5 is arranged inside the silicon rubber 4;

the heating wire 1 is formed by twisting a plurality of groups of nickel-chromium alloy metal wires, high-temperature-resistant magnesium oxide is arranged inside the insulating layer 3, and the shielding layer 5 is made of an aluminum alloy shielding sheet;

specifically, as shown in fig. 1, 5 and 6, the heating wire 1 is made of nickel-chromium alloy through twisting and serves as a heating source, the insulating layer 3 is internally provided with high-temperature-resistant magnesium oxide to prevent high-temperature heating and burning loss of external packaging, heat is blocked in the mica tape 2, the high-temperature resistance and the combustion resistance are high, toxic smoke cannot be released or volatilized at a high-temperature state, the shielding layer 5 can reduce the influence of an external electromagnetic field on the operation of the cable, the outward radiation of the cable with electromagnetism is prevented, external interference is reduced, the physical performance of each internal element at the high-temperature state is stable, the loss rate is low, and quick and efficient heat conduction is realized.

Example 3: the fastening structure 7 consists of a polyethylene rubber sleeve 701, a waterproof layer 702, reinforcing ribs 703, an explosion-proof sleeve 704 and sawteeth 705, the explosion-proof sleeve 704 is sleeved outside the mica tape 2, the reinforcing ribs 703 are arranged outside the explosion-proof sleeve 704, the waterproof layer 702 is coated outside the reinforcing ribs 703, the polyethylene rubber sleeve 701 is sleeved outside the waterproof layer 702, the sawteeth 705 are arranged inside the reinforcing ribs 703 and outside the explosion-proof sleeve 704, and the reinforcing ribs 703 and the explosion-proof sleeve 704 are clamped and fixed through the sawteeth 705;

the waterproof layer 702 is internally filled with a waterproof film, the section of each sawtooth 705 is a parallelogram, and the distribution direction of the sawtooth 705 on the inner side of the reinforcing rib 703 is opposite to that of the sawtooth 705 on the outer side of the explosion-proof sleeve 704;

specifically, as shown in fig. 1 and fig. 3, different from the direct packaging of a common heating cable on the market outside the mica tape 2, the polyethylene rubber sleeve 701 is sleeved on the whole outside of the mica tape 2 of the heating cable, the output end and the input end of the mica tape 2 run through the inside of the explosion-proof sleeve 704 all the time, the explosion-proof sleeve 704 and the reinforcing rib 703 are firmly fixed through the saw teeth 705, the mica tape 2 can not be twisted inside the polyethylene rubber sleeve 701 in a loose manner, the reinforcing rib 703 strengthens the whole compressive strength of the cable, and is not easy to deform, the waterproof layer 702 and the explosion-proof sleeve 704 improve the waterproof and explosion-proof performance of the cable, and the fire oil gas and the like can not invade from the outside and can not corrode after long-term use.

Example 4: the protective structure 9 is composed of a stainless steel sleeve 901, an outer groove 902, an outer flange 903 and a metal braided wire 904, the stainless steel sleeve 901 is arranged outside the second adhesive layer 8, seven groups of outer grooves 902 and outer flanges 903 are arranged on the inner wall of the stainless steel sleeve 901, the outer grooves 902 and the outer flanges 903 are distributed on the inner wall of the stainless steel sleeve 901 in a staggered mode, and the metal braided wire 904 is arranged inside the outer grooves 902;

the outer grooves 902 are provided with seven groups and are annularly distributed about the inner center of the stainless steel sleeve 901;

specifically, as shown in fig. 1 and fig. 4, the stainless steel sleeve 901 is bonded to the outside of the polyethylene rubber sleeve 701 through the second bonding layer 8, the outside of the stainless steel sleeve 901 is provided with an outer groove 902 and an outer flange 903 in a staggered manner, the inside of the outer groove 902 is provided with the metal braided wire 904, the metal braided wire 904 enables the outer surface of the stainless steel sleeve 901 to keep circular and disperse pressure, the toughness is improved, the metal braided wire 904 is not easily broken due to the material characteristics when pulled by external force, so that the internal heating wire 1 is protected from being broken, the wear resistance is high, the cable is not easily damaged due to friction with a rough surface or a ground surface, the overall mechanical strength of the cable is improved, and the service life of the cable in an outdoor severe environment can be effectively guaranteed.

Example 5: the mounting structure 11 comprises a female connector 1101, a clamping groove 1102, clamping blocks 1103, elastic clamping strips 1104 and a male connector 1105, wherein the female connector 1101 is arranged at one side of the third adhesive layer 10, the male connector 1105 is fixedly connected to one side of the female connector 1101, four groups of clamping grooves 1102 are arranged around the female connector 1101, four groups of elastic clamping strips 1104 are arranged around the male connector 1105, and the clamping blocks 1103 are respectively arranged at the inner sides of the elastic clamping strips 1104;

the fixture block 1103 is buckled inside the clamping groove 1102, an external thread is arranged on the inner side of the male connector 1105, an internal thread is arranged inside the female connector 1101, and the female connector 1101 and the male connector 1105 are in threaded connection;

specifically, as shown in fig. 1 and 5, the cable can customize length according to actual need, be provided with mounting structure 11 with power plug junction, female connector 1101 and male connector 1105 form threaded connection through internal thread and external screw thread, draw-in groove 1102 and fixture block 1103 form the block connection, dual connection stability is stronger, two-way pulling, twist and move all can't break away from, pull out elasticity card strip 1104 outside with strength when needing to remove the connection and make fixture block 1103 break away from draw-in groove 1102, later unscrew can remove threaded connection again, need not to use the screw to fasten from four directions, be convenient for later stage maintenance and maintenance.

Example 6: the telescopic structure 13 is composed of an inner telescopic sleeve 1301, an outer telescopic sleeve 1302, a fixed sleeve 1303, a sliding groove 1304 and a sliding block 1305, the inner telescopic sleeve 1301 is fixedly connected to one side of the fourth adhesive layer 12, the outer telescopic sleeve 1302 is sleeved outside the inner telescopic sleeve 1301, the fixed sleeve 1303 is sleeved outside the outer telescopic sleeve 1302, the sliding groove 1304 is arranged on the inner walls of the outer telescopic sleeve 1302 and the fixed sleeve 1303, the sliding block 1305 is arranged at the edges of the inner walls of the inner telescopic sleeve 1301 and the outer telescopic sleeve 1302, and the sliding block 1305 is respectively embedded inside the sliding groove 1304 and is in sliding connection with the sliding groove 1304;

the cross section of the sliding block 1305 is semicircular, the inner diameters of the fixed sleeve 1303, the outer telescopic sleeve 1302 and the inner telescopic sleeve 1301 are sequentially arranged from large to small, the fixed sleeve 1303, the outer telescopic sleeve 1302 and the inner telescopic sleeve 1301 are arranged, and two groups of the outer telescopic sleeves 1302 are arranged inside the fixed sleeve 1303 and are symmetrically distributed about the horizontal center line of the fixed sleeve 1303;

specifically, as shown in fig. 1, 6 and 7, a fixing sleeve 1303 is disposed at an input end of the cable, i.e., a power connector, the fixing sleeve 1303 is directly bonded and fixed to the mica tape 2, an outer telescopic sleeve 1302 inside the fixing sleeve 1303 can be pulled out to both sides, a slider 1305 slides in a sliding groove 1304 to keep the smoothness of the pulling out, an inner telescopic sleeve 1301 can be pulled out from the outer telescopic sleeve 1302 in the same way, the input end of the cable is covered by the fixing sleeve 1303 to form a protection after being pulled out, the inner telescopic sleeve 1301, the outer telescopic sleeve 1302 and the fixing sleeve 1303 are all elastically bendable, so as to prevent the cable from being cracked or poorly contacted due to a large bending angle between the inner telescopic sleeve 1301, the outer telescopic sleeve 1302 and the fixing sleeve 1303 when the plug is plugged into the socket, and to achieve a certain guiding and protecting effect.

The working principle is as follows: when the cable is used, firstly, the heating wire 1 is twisted by nickel-chromium alloy to be used as a heating source, the high-temperature-resistant magnesium oxide is arranged in the insulating layer 3 to prevent high-temperature heating from burning and damaging external packaging, heat is blocked in the mica tape 2, the high-temperature resistance and the combustion resistance are strong, toxic smoke cannot be released or volatilized in a high-temperature state, the shielding layer 5 can reduce the influence of an external electromagnetic field on the operation of the cable, the cable is prevented from radiating electromagnetic waves outwards, external interference is reduced, the physical properties of all internal elements in the high-temperature state are stable, the loss rate is low, and quick and efficient heat conduction is realized.

Later, be different from the general heating cable in the market and directly encapsulate in mica tape 2 outside, this heating cable's mica tape 2 outside full line has cup jointed polyethylene gum cover 701, inside explosion-proof sleeve 704 is run through all the time to mica tape 2's output and input, explosion-proof sleeve 704 and strengthening rib 703 pass through sawtooth 705 and firmly fix, the same direction is kept all the time to inside and outside upset pulling no matter, mica tape 2 can not be at the inside not hard up stranded conductor of polyethylene gum cover 701, strengthening rib 703 strengthens the whole compressive strength of cable, non-deformable, waterproof layer 702 and explosion-proof sleeve 704 improve the waterproof and explosion-proof performance of cable, fire oil gas etc. can't invade from the outside, long-term use does not corrode.

Secondly, the outside of polyethylene gum cover 701 has stainless steel sleeve 901 through 8 bonding of second adhesive linkage, the outside crisscross outer recess 902 and the outward flange 903 of being provided with of stainless steel sleeve 901, the inside of outer recess 902 is provided with metal braid filament 904, metal braid filament 904 makes stainless steel sleeve 901 surface keep the circular while dispersion pressure, toughness is improved, metal braid filament 904 is difficult for the fracture because of its material characteristic when receiving external force to drag, thereby protect inside heater 1 not to split, wear resistance is strong, difficult damage with rough surface or earth's surface friction, the holistic mechanical strength of cable has been improved, can effectively guarantee the life of cable in outdoor adverse circumstances.

Thirdly, the cable can customize length according to actual need, be provided with mounting structure 11 with power plug junction, female connector 1101 and male connector 1105 pass through internal thread and external screw thread formation threaded connection, draw-in groove 1102 and fixture block 1103 form the block connection, dual connection stability is stronger, two-way pulling, twist and move all unable breaks away from, pull out elasticity card strip 1104 outside side power when needing to remove the connection and make fixture block 1103 break away from draw-in groove 1102, later unscrew and can remove threaded connection, need not to use the screw to fasten from four directions, be convenient for later stage maintenance and maintenance.

Finally, the input end of the cable, namely the power connector, is provided with a fixed sleeve 1303, the fixed sleeve 1303 is directly bonded and fixed with the mica tape 2, the outer telescopic sleeve 1302 inside the fixed sleeve 1303 can be drawn out towards two sides, the sliding block 1305 slides in the sliding groove 1304 to keep the smoothness of drawing out, the inner telescopic sleeve 1301 can be drawn out from the outer telescopic sleeve 1302 in the same way, the cable input end is covered by the fixed sleeve 1303 from the outside to form protection after being completely drawn out, the inner telescopic sleeve 1301, the outer telescopic sleeve 1302 and the fixed sleeve 1303 are all elastically bendable, the phenomenon that the cable is broken or poorly contacted due to a large bending angle between the cable input end and the actual direction of the cable when the plug is plugged into a socket is prevented, and a certain guiding and protecting effect is achieved.

The foregoing shows and describes the general principles, essential features, and inventive features of this invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.