Lightweight low-starting-current heat tracing band

Abstract

The invention discloses a light-weight low-starting-current heat tracing band, which relates to the technical field of heat tracing bands, and comprises a heat tracing band outer layer, a woven mesh, a middle insulating layer, a heating resistor body and the like, and the heat tracing band outer layer, the woven mesh, the middle insulating layer and the heating resistor body are arranged from outside to inside; the exposed bus conductor and the end part of the heating resistor body can be sealed, the heating resistor body adopts a three-dimensional network structure, the short circuit condition of the tail end of the heat tracing band is avoided, one tail end of the heat tracing band is conveniently cut and then inserted into electrical equipment, the two sealing blocks can realize multiple functions, the insulation reliability is ensured, and the service life of the heat tracing band is prolonged. The end part of the insulating outer cover is plastically packaged by using the thermal shrinkage insulating sleeve, so that liquid is prevented from permeating into the insulating outer cover, the two sides of the matching opening can be extruded for liquid isolation, the tail end insulating structure can be prevented from falling off from the tail end of the heat tracing band, and the tail end insulating structure is ensured to be firmly fixed outside the working equipment in the later period.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat tracing, in particular to a light-weight low-starting-current heat tracing. BACKGROUND

[0002] The light-weight low-starting-current heat tracing is a new type of electric heat tracing product, which has the characteristics of small starting current and light weight, and is widely used in the fields of industry and civil anti-coagulation and anti-freezing. The heat tracing has small starting current, low starting current, which can reduce the initial power distribution cost, reduce the impact on the power grid, and also prolong the service life of the heat tracing. Through optimization of materials and structure, the weight of the heat tracing is reduced, which is convenient for installation and transportation, and also reduces the additional load on the heat-traced equipment. The heating temperature is uniform within the standard range, and will not cause burning or burning due to overheating or short circuit. The manufacturing standard meets the relevant requirements, and the thermal stability is good.

[0003] In the prior art, the internal structure of the heat tracing includes heating elements, insulation layers and sheaths, etc. If the end is not sealed, water vapor and liquid in the environment may penetrate into the inside, damage the insulation layer, cause line short circuit, electric leakage or local overheating, and even cause fire. If the heat tracing is used in the anti-freezing scene, the end may be frozen after water enters, and the volume expansion of the ice will squeeze the internal elements, causing the heating wire to break or the sheath to crack, so that the heat tracing fails. If the wire joint at the end of the heat tracing is not sealed, the conductor may be exposed due to external force friction and pulling, causing electric shock risk or line interruption. Therefore, the end of the heat tracing cannot be well sealed, and the two bus conductors will also be short-circuited when the end of the heat tracing is not sealed and insulated. SUMMARY

[0004] The purpose of the present application is to provide a light-weight low-starting-current heat tracing to solve the problems in the background art.

[0005] The purpose of the present application can be achieved by the following technical solutions:

[0006] The utility model provides a kind of light weight low starting current heat tracing band, including heat tracing band outer layer, braided mesh, intermediate insulating layer, heating resistance body, two bus conductors and two bus insulating layers, the heat tracing band outer layer, braided mesh, intermediate insulating layer and heating resistance body are arranged from outside to inside, two the bus conductor and two bus insulating layers are distributed in the inside of heating resistance body, the end of the heating resistance body is provided with end sealing structure, the end sealing structure includes plug, the plug is arranged at the end of two bus conductors, two placement holes are formed in the inside of plug, two rubber rings are placed in the inside of two placement holes, two bus conductors are inserted in the inside of two rubber rings, rubber ring and the outside of bus conductor are tightly attached, plug is used to seal two bus conductors, the end of heating resistance body and located outside plug is provided with first sealing block and second sealing block, the edge of first sealing block is rotatably connected with the edge of second sealing block, the end surface of first sealing block and the end surface of second sealing block are mutually clamped, and first sealing block and second sealing block are used to fix two bus conductors.

[0007] As a preferred technical solution of the present application, a placement cavity is formed in the inside of the first sealing block and the second sealing block, the shape of the placement cavity is adapted to the shape of the plug, and the plug is arranged in the inside of the placement cavity. The closed first sealing block and second sealing block are used to fix the plug.

[0008] As a preferred technical solution of the present application, a placement groove is formed in the abutting surface of the first sealing block and the second sealing block, a first sealing gasket and a second sealing gasket are respectively arranged in the inside of the placement groove of the first sealing block and the placement groove of the second sealing block, the edge of the first sealing gasket and the edge of the second sealing gasket are provided with mutually matched matching holes, the diameter of the bus conductor is adapted to the diameter of the matching hole, and the shape of the placement groove, the shape of the first sealing gasket and the shape of the second sealing gasket are the same.

[0009] As a preferred technical solution of the present application, a pin shaft is arranged at the intersection of the edge of the first sealing block and the edge of the second sealing block, a first clamping block is integrally arranged on the end surface of the first sealing block, a second clamping block is integrally arranged on the end surface of the second sealing block, and the first clamping block of the first sealing block and the second clamping block of the second sealing block are plastically clamped.

[0010] As a preferred technical solution of the present application, a pressure mark strip is arranged on the inner wall of the first sealing block and the inner wall of the second sealing block, and the two pressure mark strips are located at the end of the heating resistance body. The pressure mark strips of the first sealing block and the second sealing block are used to compress the end of the heating resistance body.

[0011] As a preferred technical scheme of the present application, the end of the first sealing block and the end of the second sealing block are provided with a tangent structure on the abutting surface, the tangent structure comprises two fixed grooves, the first sealing block and the second sealing block are respectively provided on the abutting surface of the two fixed grooves, a first pressing block is melt-provided in the fixed groove of the first sealing block, a cutting knife is fixedly installed in the first pressing block, a second pressing block is melt-provided in the fixed groove of the second sealing block, a matching groove is provided in the second pressing block, the width of the cutting knife is matched with the width of the matching groove, and the cutting knife is used to cut the busbar insulating layer outside the busbar conductor.

[0012] As a preferred technical scheme of the present application, the lower surface of the first pressing block is provided with a first reserved hole, the upper surface of the second pressing block is provided with a second reserved hole, the shape of the first reserved hole is matched with the shape of the second reserved hole, the diameter of the first reserved hole and the diameter of the second reserved hole are both smaller than the diameter of the busbar insulating layer, and the diameter of the first reserved hole and the diameter of the second reserved hole are equal to the diameter of the busbar conductor.

[0013] As a preferred technical scheme of the present application, the material of the first clamping block is deformable plastic, the depth of the fixed groove of the second sealing block is smaller than the height of the second pressing block, and the end of the busbar conductor pushes the first clamping block to deflect.

[0014] As a preferred technical scheme of the present application, the outer end of the outer layer of the heat tracing tape is sleeved with a terminal insulation structure, the terminal insulation structure comprises an insulation cover and a containing cavity, the containing cavity is arranged in the insulation cover, the insulation cover is sleeved on the outside of the outer layer of the heat tracing tape, the end of the insulation cover and located outside the terminal sealing structure is sleeved with a matching end, the matching end is clamped with the insulation cover, the insulation cover and the matching end are both made of insulating material, and the insulation cover and the matching end are used to prevent liquid from entering the inside of the terminal sealing structure.

[0015] As a preferred technical scheme of the present application, the end of the insulation cover and located away from the end of the outer layer of the heat tracing tape is provided with a heat-shrinkable insulation sleeve, the edge of the heat-shrinkable insulation sleeve is integrally arranged with the end of the insulation cover, the heat-shrinkable insulation sleeve is wrapped outside the outer layer of the heat tracing tape after being heated and shrunk, and the inner wall of the insulation cover and located at the end of the intermediate insulating layer is provided with a pressing matching opening, which is used to clamp the end of the intermediate insulating layer after being extruded.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] The terminal sealing structure is provided, the rubber ring is closely abutted with the busbar conductor, the two sealing blocks are clamped with the plug block and the heating resistor body, the exposed end of the busbar conductor and the heating resistor body can be sealed, liquid can be prevented from penetrating into the end of the outer layer of the heat tracing tape, and the short circuit of the end of the heat tracing tape can be avoided.

[0018] The inner walls of the two sealing blocks are provided with two sealing pads and indentation strips, the two sealing pads can further seal the two busbar conductors, and the indentation strips can press the ends of the heating resistor body, further avoiding liquid from seeping into the heating resistor body;

[0019] The tangent structure is provided, the cutting knife is moved when the first sealing block and the second sealing block are closed, so that the external busbar insulation layer of the busbar conductor can be cut, and one end of the heating tape can be cut and inserted into the electrical equipment, and the two sealing blocks can realize multiple functions;

[0020] The end insulation structure is provided, the two sealing blocks are isolated by the insulating cover and the matching end, further avoiding liquid from entering the sealing block, ensuring the reliability of the insulation, and the end of the insulating cover is plastic sealed by the heat shrinkable insulating sleeve, avoiding liquid from seeping into the insulating cover;

[0021] The inner wall of the insulating cover is provided with an extrusion matching port, the outer skin material of the insulating cover is extruded, the extrusion matching port is clamped with the protruding insulating cover outer skin, not only the liquid can be isolated on both sides of the extrusion matching port, but also the end insulation structure can be prevented from falling off from the end of the heating tape, ensuring that the end insulation structure is fixed outside the working equipment. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to facilitate the understanding of those skilled in the art, the present application will be further described below with reference to the drawings.

[0023] Figure 1 is the main structure diagram of the present application;

[0024] Figure 2 is the busbar conductor and heating resistor body schematic diagram of the present application;

[0025] Figure 3 is the end sealing structure schematic diagram of the present application;

[0026] Figure 4 is the sealing block and rubber ring schematic diagram of the present application;

[0027] Figure 5 is the first sealing block and second sealing block schematic diagram of the present application;

[0028] Figure 6 is the tangent structure schematic diagram of the present application;

[0029] Figure 7 is the first pressing block and second pressing block schematic diagram of the present application;

[0030] Figure 8 is the end insulation structure schematic diagram of the present application;

[0031] Figure 9 Schematic diagram of the extrusion fitting port of the application;

[0032] Figure 10 Schematic diagram of the three-dimensional mesh structure of the heating resistor of the application.

[0033] In the figure: 1, outer layer of the heat tracing band; 2, end insulation structure; 3, end sealing structure; 4, tangent structure; 5, woven mesh; 6, intermediate insulation layer; 7, busbar conductor; 8, busbar insulation layer; 9, heating resistor; 21, insulation cover; 22, heat-shrinkable insulation sleeve; 23, accommodating cavity; 24, fitting end; 25, extrusion fitting port; 31, plug; 32, first sealing block; 33, second sealing block; 34, placement cavity; 35, rubber ring; 36, first sealing gasket; 37, second sealing gasket; 38, fitting hole; 39, indentation strip; 310, pin shaft; 311, first clamping block; 312, second clamping block; 41, fixing groove; 42, first pressing block; 43, second pressing block; 44, cutting knife; 45, first reserved hole; 46, second reserved hole; 47, fitting groove. DETAILED DESCRIPTION

[0034] The technical solutions of the application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the protection scope of the application.

[0035] Embodiment one:

[0036] Please refer to Figure 1 - Figure 6 As shown in the figure, a lightweight low-starting-current heat tracing band includes a heat tracing band outer layer 1, a woven mesh 5, an intermediate insulation layer 6, a heating resistor 9, two busbar conductors 7, and two busbar insulation layers 8. The heat tracing band outer layer 1, the woven mesh 5, the intermediate insulation layer 6, and the heating resistor 9 are arranged from outside to inside, and the two busbar conductors 7 and the two busbar insulation layers 8 are distributed inside the heating resistor 9. The heating resistor 9 adopts a three-dimensional mesh structure (as shown in the figure). Figure 10The electric heat tracing band is composed of nanometer conductive heating resistor 9 and two parallel busbar insulation layers 8. Due to the parallel structure, the electric heat tracing band can be cut into any length on site. One end of the electric heat tracing band is connected with the junction box or power supply. In each electric heat tracing band, the number of circuits between the heating resistors 9 changes with the influence of temperature. When the temperature around the electric heat tracing band becomes cold, the differential molecules of the conductive plastic shrink to connect the heating resistors 9 to form circuits. The current passing through the circuits makes the electric heat tracing band heat, so that the electric heat tracing band can generate heat. The other end of the electric heat tracing band is sealed. The end of the heating resistor 9 is provided with a terminal sealing structure 3. The terminal sealing structure 3 includes a plug 31 arranged at the end of the two busbar conductors 7. Two placing holes are formed in the plug 31. Rubber rings 35 are arranged in the two placing holes. The two busbar conductors 7 are inserted into the two rubber rings 35. The rubber rings 35 are tightly attached to the outside of the busbar conductors 7. The material on the outside of the busbar conductors 7 is stripped to expose the busbar conductors 7. Then the rubber rings 35 are inserted into the ends of the busbar conductors 7. The busbar conductors 7 are wrapped tightly. Then the rubber rings 35 of the two busbar conductors 7 are inserted into the plug 31. At this time, the rubber rings 35 are tightly attached to the outside of the busbar conductors 7. The plug 31 is used to seal the two busbar conductors 7. The two busbar conductors 7 can be cut off by the two rubber rings 35 to avoid short circuit of the electric heat tracing band. The ends of the busbar conductors 7 can be sealed by the plug 31 and the rubber rings 35 to avoid liquid from seeping into the busbar conductors 7. The ends of the heating resistors 9 outside the plug 31 are provided with a first sealing block 32 and a second sealing block 33. The edges of the first sealing block 32 and the second sealing block 33 are rotationally connected. The first sealing block 32 and the second sealing block 33 can be rotated to close or open the first sealing block 32 and the second sealing block 33. The end faces of the first sealing block 32 and the second sealing block 33 are clamped with each other. The first sealing block 32 and the second sealing block 33 are clamped when the first sealing block 32 and the second sealing block 33 are closed. The first sealing block 32 and the second sealing block 33 are loosened when the first sealing block 32 and the second sealing block 33 are opened. The first sealing block 32 and the second sealing block 33 are used to fix the two busbar conductors 7. The busbar conductors 7 are fixed between the first sealing block 32 and the second sealing block 33 to avoid the end of the electric heat tracing band from being separated from the two sealing blocks.

[0037] Please refer to Figure 3 and Figure 5As shown in the figure, the inside of the first sealing block 32 and the second sealing block 33 is provided with a placing cavity 34, the shape of the placing cavity 34 is matched with the shape of the plug 31, the plug 31 is arranged inside the placing cavity 34, and the closed first sealing block 32 and the second sealing block 33 are used to fix the plug 31. The plug 31 is placed between the first sealing block 32 and the second sealing block 33, so that the plug 31 can be tightly clamped between the first sealing block 32 and the second sealing block 33, and the busbar conductor 7 placed in the plug 31 is prevented from being separated from the inside of the first sealing block 32 and the second sealing block 33.

[0038] As shown in the figure, Figure 3 and Figure 5 As shown in the figure, the abutting surface of the first sealing block 32 and the second sealing block 33 is provided with a placing groove, the placing groove is located at the edge position of the placing cavity 34, and the inside of the placing groove of the first sealing block 32 and the inside of the placing groove of the second sealing block 33 are respectively provided with a first sealing gasket 36 and a second sealing gasket 37. The first sealing gasket 36 can be placed in the placing groove of the first sealing block 32, and the second sealing gasket 37 can be placed in the placing groove of the second sealing block 33. The sealing gasket can further seal the end of the heat tracing tape. The edge of the first sealing gasket 36 and the edge of the second sealing gasket 37 are provided with a matching hole 38 matched with each other, the diameter of the busbar conductor 7 is matched with the diameter of the matching hole 38, the shape of the placing groove, the shape of the first sealing gasket 36 and the shape of the second sealing gasket 37 are the same, the busbar conductor 7 can be inserted into the matching hole 38, so that the busbar conductor 7 can also be sealed.

[0039] As shown in the figure, Figure 5 and Figure 6 As shown in the figure, the intersection of the edge of the first sealing block 32 and the edge of the second sealing block 33 is provided with a pin shaft 310, the first sealing block 32 is rotatably connected with the second sealing block 33 through the pin shaft 310, the end surface of the first sealing block 32 is integrally provided with a first clamping block 311, the end surface of the second sealing block 33 is integrally provided with a second clamping block 312, and the first clamping block 311 of the first sealing block 32 and the second clamping block 312 of the second sealing block 33 are plastically clamped. After the first sealing block 32 and the second sealing block 33 are closed, the first clamping block 311 and the second clamping block 312 can be clamped, so that the plug 31 can be tightly clamped in the inside of the placing cavity 34.

[0040] As shown in the figure, Figure 5As shown, the inner wall of the first sealing block 32 and the inner wall of the second sealing block 33 are provided with indentation strips 39, and the two indentation strips 39 are located at the ends of the heating resistor body 9. The indentation strips 39 of the first sealing block 32 and the second sealing block 33 are used to press the ends of the heating resistor body 9. After the bus conductor 7 is exposed from the heating resistor body 9, the bus conductor 7 can be inserted into the gap between the first sealing block 32 and the second sealing block 33, and the heating resistor body 9 can also be inserted into the gap between the first sealing block 32 and the second sealing block 33. After the first sealing block 32 and the second sealing block 33 are closed, the indentation strips 39 in the two sealing blocks can be used to press the heating resistor body 9, so that a recessed area is formed at the end of the heating resistor body 9, thereby preventing liquid from seeping from the heating resistor body 9 to the bus conductor 7.

[0041] Please refer to Figure 2 、 Figure 6 and Figure 7 As shown, the end of the first sealing block 32 and the end of the second sealing block 33 are provided with a tangent structure 4 on the abutting surface. The tangent structure 4 includes two fixed grooves 41, and the two fixed grooves 41 are respectively provided on the abutting surface of the first sealing block 32 and the second sealing block 33. The positions of the two fixed grooves 41 are aligned with each other. The fixed groove 41 of the first sealing block 32 is internally fused with a first pressing block 42, and the first pressing block 42 is internally fixedly installed with a cutting knife 44. The first pressing block 42 rises and falls with the first sealing block 32, so as to drive the cutting knife 44 to move. The fixed groove 41 of the second sealing block 33 is internally fused with a second pressing block 43, and the second pressing block 43 is internally provided with a matching groove 47. The width of the cutting knife 44 is matched with the width of the matching groove 47. The cutting knife 44 is used to cut the busbar insulation layer 8 outside the bus conductor 7. The descending cutting knife 44 can be inserted into the matching groove 47 of the second pressing block 43, so as to cut the bus conductor 7 placed on the second pressing block 43, and cut off the busbar insulation layer 8 or the heating resistor body 9 outside the bus conductor 7.

[0042] Please refer to Figure 6 and Figure 7As shown, the lower surface of the first pressing block 42 is provided with a first reserved hole 45, the upper surface of the second pressing block 43 is provided with a second reserved hole 46, the shape of the first reserved hole 45 is matched with the shape of the second reserved hole 46, the first reserved hole 45 and the second reserved hole 46 of the first pressing block 42 and the second pressing block 43 form a whole circle, the diameter of the first reserved hole 45 and the diameter of the second reserved hole 46 are both smaller than the diameter of the busbar insulating layer 8, and the diameter of the first reserved hole 45 and the diameter of the second reserved hole 46 are equal to the diameter of the busbar conductor 7. The heating resistor 9 can be cut off by the cutting knife 44, and the busbar insulating layer 8 can be cut by the first reserved hole 45 and the second reserved hole 46. Therefore, one end of the busbar conductor 7 can be connected with the power supply or the connecting box, and the other end of the busbar conductor 7 can be put into the end sealing structure 3 for fixation.

[0043] As shown in Figure 6 As shown, the material of the first clamping block 311 is deformable plastic, the depth of the fixed groove 41 of the second sealing block 33 is smaller than the height of the second pressing block 43, and the end of the busbar conductor 7 pushes the first clamping block 311 to deflect. Since the first clamping block 311 is deformable plastic, the straightened first clamping block 311 can be clamped with the second clamping block 312. When the busbar conductor 7 is cut off by being put into the first reserved hole 45 and the second reserved hole 46, the protruding busbar conductor 7 or the heating resistor 9 and other materials can push the first clamping block 311, and the first clamping block 311 will not affect the cutting of the busbar conductor 7 and the heating resistor 9.

[0044] As shown in Figure 2 , Figure 8 and Figure 9 As shown, the outer end of the heating tape outer layer 1 is sleeved with the end insulation structure 2, the end insulation structure 2 includes an insulating cover 21 and a containing cavity 23, the containing cavity 23 is arranged inside the insulating cover 21, the insulating cover 21 is sleeved outside the heating tape outer layer 1, the inner cavity of the containing cavity 23 is matched with the cross section of the heating tape, so that the end of the heating tape can be inserted into the containing cavity 23, and the end of the insulating cover 21 outside the end sealing structure 3 is sleeved with a matching end 24, the cross section of the matching end 24 is matched with the cross section of the first sealing block 32 and the second sealing block 33, so that the matching end 24 can be fixed when the matching end 24 is inserted into the first sealing block 32 and the second sealing block 33, the matching end 24 is clamped with the insulating cover 21, the insulating cover 21 and the matching end 24 are both insulating materials, the liquid outside the heating tape outer layer 1 will not conduct electricity, and the insulating cover 21 and the matching end 24 are used to prevent the liquid from entering the inside of the end sealing structure 3. Clamping the insulating cover 21 with the matching end 24 can further seal the end of the busbar conductor 7.

[0045] As shown in Figure 8 andFigure 9 As shown, the end of the insulation cover 21 and the end of the outer layer 1 of the heat tracing band are provided with a heat-shrinkable insulation sleeve 22, the edge of the heat-shrinkable insulation sleeve 22 is integrally arranged with the end of the insulation cover 21, and the heat-shrinkable insulation sleeve 22 is wrapped outside the outer layer 1 of the heat tracing band after being heated and shrunk. The heat-shrinkable insulation sleeve 22 wrapped outside the heat tracing band can be heated and shrunk by using a hot air blower, so that the heat-shrinkable insulation sleeve 22 is tightly attached to the outer surface of the outer layer 1 of the heat tracing band. The inner wall of the insulation cover 21 and the end of the intermediate insulation layer 6 are provided with an extrusion fitting port 25, which is used to extrude and clamp the end of the intermediate insulation layer 6, and push the end skin of the outer layer 1 of the heat tracing band to gather at the extrusion fitting port 25. Since the heating resistor 9 adopts a three-dimensional mesh structure, it can be slightly shrunk, so that the extrusion fitting port 25 clamps the thick skin of the outer layer 1 of the heat tracing band. After the insulation cover 21 and the fitting end 24 are clamped together, the position of the insulation cover 21 is limited by the skin of the outer layer 1 of the heat tracing band, so that the end insulation structure 2 at the end of the bus conductor 7 cannot move or loosen.

[0046] The preferred embodiments disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details and do not limit the present application to the specific embodiments. Obviously, many modifications and variations can be made according to the content of the present application. The present application is selected and described in detail, in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application. The present application is limited by the claims and their full scope and equivalents.

Claims

1. A lightweight, low-starting-current heat tracing cable, comprising an outer layer (1), a braided mesh (5), an intermediate insulation layer (6), a heating resistor (9), two busbar conductors (7), and two busbar insulation layers (8), wherein the outer layer (1), braided mesh (5), intermediate insulation layer (6), and heating resistor (9) are arranged from the outside inwards, and the two busbar conductors (7) and two busbar insulation layers (8) are distributed inside the heating resistor (9), characterized in that, The end of the heating resistor (9) is provided with a terminal sealing structure (3), the terminal sealing structure (3) comprises a plug (31), the plug (31) is arranged at the end of the two bus conductors (7), the inside of the plug (31) is provided with two placing holes, the inside of the two placing holes is respectively provided with a rubber ring (35), the two bus conductors (7) are inserted into the inside of the two rubber rings (35), the rubber ring (35) is tightly combined with the outside of the bus conductor (7), the plug (31) is used for sealing treatment of the two bus conductors (7), the end of the heating resistor (9) and the outside of the plug (31) are provided with a first sealing block (32) and a second sealing block (33), the edge of the first sealing block (32) is rotatably connected with the edge of the second sealing block (33), the end surface of the first sealing block (32) and the end surface of the second sealing block (33) are mutually clamped, and the first sealing block (32) and the second sealing block (33) are used for fixing the two bus conductors (7).

2. The light weight low start-up current heat tracing tape according to claim 1, wherein, The inside of the first sealing block (32) and the second sealing block (33) is provided with a placing cavity (34), the shape of the placing cavity (34) is matched with the shape of the plug (31), the plug (31) is arranged in the inside of the placing cavity (34), and the closed first sealing block (32) and the second sealing block (33) are used for fixing the fixed plug (31).

3. The light weight low start-up current heat tracing tape according to claim 2, wherein, The abutting surface of the first sealing block (32) and the second sealing block (33) is provided with a placing groove, the inside of the placing groove of the first sealing block (32) and the inside of the placing groove of the second sealing block (33) are respectively provided with a first sealing pad (36) and a second sealing pad (37), the edge of the first sealing pad (36) and the edge of the second sealing pad (37) are provided with mutually matched matching holes (38), the diameter of the bus conductor (7) is matched with the diameter of the matching hole (38), and the shape of the placing groove, the shape of the first sealing pad (36) and the shape of the second sealing pad (37) are same.

4. The light weight low start-up current heat tracing tape of claim 3, wherein, The edge of the first sealing block (32) and the edge of the second sealing block (33) are provided with a pin shaft (310), the end surface of the first sealing block (32) is integrally provided with a first clamping block (311), the end surface of the second sealing block (33) is integrally provided with a second clamping block (312), and the first clamping block (311) of the first sealing block (32) and the second clamping block (312) of the second sealing block (33) are plasticly clamped.

5. The light weight low start-up current heat tracing tape according to claim 4, wherein, The inner wall of the first sealing block (32) and the inner wall of the second sealing block (33) are provided with a score line (39), the two score lines (39) are located at the end of the heating resistor (9), and the score lines (39) of the first sealing block (32) and the second sealing block (33) are used for pressing the end of the heating resistor (9).

6. The light weight low start-up current tracing band according to claim 4 or 5, characterized in that, The end of the first sealing block (32) and the end of the second sealing block (33) are provided with a tangent structure (4), the tangent structure (4) comprises two fixed grooves (41), the first sealing block (32) and the second sealing block (33) are respectively provided with a fixed groove (41), the inside of the fixed groove (41) of the first sealing block (32) is fusedly provided with a first pressing block (42), the inside of the first pressing block (42) is fixedly provided with a cutting knife (44), the inside of the fixed groove (41) of the second sealing block (33) is fusedly provided with a second pressing block (43), the inside of the second pressing block (43) is provided with a matching groove (47), the width of the cutting knife (44) and the width of the matching groove (47) are matched, and the cutting knife (44) is used for cutting the busbar insulating layer (8) outside the busbar conductor (7).

7. The light weight low start-up current heat tracing tape according to claim 6, wherein, The lower surface of the first pressing block (42) is provided with a first reserved hole (45), the upper surface of the second pressing block (43) is provided with a second reserved hole (46), the shape of the first reserved hole (45) and the shape of the second reserved hole (46) are matched, the diameter of the first reserved hole (45) and the diameter of the second reserved hole (46) are smaller than the diameter of the busbar insulating layer (8), and the diameter of the first reserved hole (45) and the diameter of the second reserved hole (46) are equal to the diameter of the busbar conductor (7).

8. The light weight low start-up current heat tracing tape according to claim 7, wherein, The material of the first clamping block (311) is deformable plastic, the depth of the fixed groove (41) of the second sealing block (33) is smaller than the height of the second pressing block (43), and the end of the busbar conductor (7) pushes the first clamping block (311) to deflect.

9. The light weight low start-up current heat trace tape of claim 8, wherein, The outer end of the heat tracing band outer layer (1) is sleeved with a terminal insulation structure (2), the terminal insulation structure (2) comprises an insulation cover (21) and a containing cavity (23), the containing cavity (23) is arranged in the inside of the insulation cover (21), the insulation cover (21) is sleeved on the outside of the heat tracing band outer layer (1), and the end of the insulation cover (21) and located outside the terminal sealing structure (3) is sleeved with a matching end (24), the matching end (24) is clamped with the insulation cover (21), the insulation cover (21) and the matching end (24) are both made of insulating material, and the insulation cover (21) and the matching end (24) are used for preventing liquid from entering the inside of the terminal sealing structure (3).

10. The light weight low start-up current heat trace tape of claim 9, wherein, The end of the insulation cover (21) and located away from the end of the heat tracing band outer layer (1) is provided with a heat-shrinkable insulation sleeve (22), the edge of the heat-shrinkable insulation sleeve (22) is integrally arranged with the end of the insulation cover (21), and the heat-shrinkable insulation sleeve (22) is wrapped outside the heat tracing band outer layer (1) after being heated and shrunk, and the inner wall of the insulation cover (21) and located at the end of the intermediate insulating layer (6) is provided with an extrusion matching port (25), which is used for clamping after extruding the end of the intermediate insulating layer (6).

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