A multi-continuous heating cable and method of use thereof

Abstract

The present application relates to the technical field of heating cable, in particular to a multi-connected heating cable and a using method thereof, through the connecting sheet connected to the both sides of the cable body, the end of the connecting sheet away from the cable body is connected with the connecting ring, the connecting ring is sleeved on the connecting sheet on the adjacent cable body respectively, in the initial state, the elastic component pushes the pressing block, so that the elastic ball component abuts on the sleeved connecting sheet, and the connecting ring slides along the connecting sheet, which is used for easily adjusting the distance between the adjacent cable bodies, forming the multi-connected heating cable which can be easily and flexibly adjusted, after adjusting, the multi-connected heating cable is directly wound on the pipeline, the connecting sheet is deflected, thereby pressing the elastic ball component, so that the pressing block is tightly pressed on the sleeved connecting sheet, thereby increasing the sliding resistance between the connecting sheet and the connecting ring, avoiding the displacement or distortion of each cable body after winding, and facilitating the stable winding use of the cable body.

Description

Technical Field

[0001] This invention relates to the field of heating cable technology, and in particular to a multi-connected heating cable and its usage method. Background Technology

[0002] Heating cables typically consist of a heating element, an insulation layer around the heating element, and a sheath surrounding the insulation layer. The heating element generates Joule heat when current is passed through it. Mineral-insulated heating cables, for example, consist of a metal core, a tightly wrapped magnesium oxide insulation layer, and a metal sheath. They are suitable for pipe freezing protection and heat preservation / heating of process media within pipes in industrial or construction applications. However, in practice, multiple cables are usually wound around the pipe one by one, which is cumbersome and prone to loosening. To address this, existing technologies, such as the one disclosed in Chinese patent document CN204697323U, provide a solution... The induction heating device for pipe-to-pipe tee welding has multiple radial bottom pressure plates and multiple axial surrounding pressure plates arranged around a circular perimeter. Multiple turns of bottom heating cable are coiled between the bottom pressure plates from the outside to the inside, and multiple turns of surrounding heating cable are wrapped around the surrounding pressure plates from top to bottom. Multiple heating cables are pre-connected by welding. However, especially for mineral-insulated heating cables, the welding process has strict requirements, which can easily damage the cable structure and is not suitable for on-site welding and maintenance. As a result, the spacing between the heating cables is not easy to adjust, and the adaptability to flexibly adjust the density is insufficient when used in different pipelines. Summary of the Invention

[0003] In view of this, the purpose of this invention is to provide a multi-connected heating cable and its usage method to solve the problem that the spacing between the heating cables is inconvenient to adjust when multiple heating cables are connected.

[0004] To achieve the above objectives, the present invention provides a multi-connected heating cable, comprising a cable body, and further comprising:

[0005] Connecting pieces are attached to both sides of the cable body. A connecting ring is attached to the end of the connecting piece away from the cable body. The connecting pieces between adjacent cable bodies are staggered so that the connecting rings are respectively fitted onto the connecting pieces on the adjacent cable bodies.

[0006] An elastic component is located inside the connecting ring. One end of the elastic component is fixedly connected to the inner side of the connecting ring, and the other end is connected to a pressure block. An elastic ball component is protruding from the end face of the pressure block away from the elastic component. In the initial state, the elastic component pushes the pressure block so that the elastic ball component abuts against the sleeved connecting piece. The connecting ring slides along the connecting piece to adjust the spacing between adjacent cable bodies. When the connecting piece deflects, it presses against the elastic ball component so that the pressure block is pressed tightly against the sleeved connecting piece.

[0007] Preferably, the connecting piece is rotatably connected to both sides of the cable body, and the rotatable connection is provided with a spring-loaded part.

[0008] Preferably, the cable body is provided with hinge seats on both sides, the end of the connecting piece is rotatably connected to the hinge seat, and the spring-loaded part is an L-shaped spring piece located on both sides of the end of the connecting piece inside the hinge seat.

[0009] Preferably, the elastic ball assembly includes a ball seat elastically connected to the end face of the pressure block, and a ball is rotatably connected to the ball seat, with the ball abutting against the sleeved connecting piece.

[0010] Preferably, the end face of the pressure block away from the elastic component is frosted, and the side of the connecting piece facing the pressure block is frosted.

[0011] Preferably, the connecting ring includes a first half-ring and a second half-ring. One end of the first half-ring is rotatably connected to one end of the second half-ring. A limiting groove is formed at the other end of the first half-ring. A spring is provided at the other end of the second half-ring. One end of the spring is elastically connected to the second half-ring, and the other end is connected to a limiting wedge. The limiting wedge is inserted into the limiting groove and is used to connect the first half-ring and the second half-ring. A pin is fixedly connected to the end of the spring that penetrates into the second half-ring. In the initial state, the spring pushes the pin out of the second half-ring. A protruding edge is provided on the end of the connecting ring away from the pin. When adjacent connecting rings collide, the protruding edge pushes the pin, and the pin drives the limiting wedge to retract inward so that the limiting wedge moves out of the limiting groove.

[0012] Preferably, one end of the elastic component is fixedly connected to the inner side of the first half-ring, and a flat groove is provided on the inner side of the second half-ring. The elastic ball component protrudes into the flat groove and is used to abut against the connecting piece of the sleeve.

[0013] Preferably, the inner end face of the flat groove is frosted, and the side of the connecting piece facing the flat groove is frosted.

[0014] The present invention also provides a method for using a multi-connected heating cable, comprising the following steps:

[0015] In the initial state, each cable body is placed horizontally, and the elastic ball assembly abuts against the sleeved connecting piece. The connecting ring slides along the connecting piece to adjust the spacing between adjacent cable bodies, forming a multi-connected heating cable with adjustable density.

[0016] After adjustment, the multi-connected heating cable is wound around the pipe. The connecting plate deflects, thereby pressing against the elastic ball assembly, so that the pressure block is pressed tightly against the sleeved connecting plate, increasing the resistance to sliding between the connecting plate and the connecting ring, and preventing the cable body from shifting or twisting after winding.

[0017] Preferably, when storing or transporting multi-layer heating cables, the cable bodies of each layer are stacked in an alternating manner, with the upper layer of cable body pressed against the middle of the connecting piece of the lower layer. The bottom connecting piece is deformed by weight, thereby pressing against the elastic ball bearing assembly, so that the connecting piece and the pressure block are pressed together, increasing the resistance to sliding between the connecting piece and the connecting ring, and preventing the cable bodies from shifting.

[0018] The beneficial effects of this invention are as follows: A connecting ring is connected to the end of the connecting piece away from the cable body, which is connected to both sides of the cable body. The connecting rings are respectively sleeved on the connecting pieces of adjacent cable bodies. In the initial state, the elastic component pushes the pressure block, causing the elastic ball assembly to abut against the sleeved connecting piece. As the elastic ball assembly rolls against the sleeved connecting piece, the connecting ring slides along the connecting piece, easily adjusting the spacing between adjacent cable bodies. This forms a multi-connected heating cable with easily and flexibly adjustable density. After adjustment, the multi-connected heating cable is directly wound around the pipe. At this time, the connecting piece will deflect, thereby pressing against the elastic ball assembly, causing the pressure block to press tightly against the sleeved connecting piece. This increases the resistance to sliding between the connecting piece and the connecting ring, preventing displacement or twisting of each cable body after winding, and facilitating stable winding and use of the cable body. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 For the present invention Figure 1 Enlarged view of point B in the middle;

[0023] Figure 4 This is a schematic diagram of the connecting ring of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the first and second half-rings of the present invention during separation;

[0025] Figure 6 This is a top view of the limiting groove and limiting wedge of the present invention;

[0026] Figure 7This is a schematic diagram of the structure of the limiting wedge block of the present invention when it is moved into the limiting groove;

[0027] Figure 8 This is a schematic diagram of the structure of the present invention when the limiting wedge is engaged in the limiting groove;

[0028] Figure 9 This is a schematic diagram of the structure of the cable body of the present invention when it is wound around a pipe;

[0029] Figure 10 The present invention Figure 9 Enlarged view of point C in the middle;

[0030] Figure 11 This is a schematic diagram of the structure of the cable body of the present invention when it is wound in reverse around the pipe;

[0031] Figure 12 The present invention Figure 11 Enlarged view of point D in the middle;

[0032] Figure 13 This is a schematic diagram of the structure of the cable body of the present invention when it is stacked in an interlaced manner;

[0033] Figure 14 The present invention Figure 13 Enlarged diagram of point E in the middle.

[0034] The diagram is marked as follows:

[0035] 1. Cable body; 2. Connecting piece; 3. Connecting ring; 31. First half ring; 32. Second half ring; 33. Flat groove; 4. Elastic component; 5. Pressure block; 6. Elastic ball assembly; 61. Ball seat; 62. Ball; 7. Hinge seat; 8. Rebound part; 9. Limiting groove; 10. Spring tongue; 11. Limiting wedge; 12. Pin; 13. Protruding edge. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0037] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] like Figure 1 , Figure 2 , Figure 3 As shown, a multi-connected heating cable includes a cable body 1 and connecting pieces 2 connected to both sides of the cable body 1. A connecting ring 3 is connected to the end of the connecting piece 2 away from the cable body 1. The connecting pieces 2 between adjacent cable bodies 1 are staggered so that the connecting ring 3 is respectively sleeved on the connecting piece 2 on the adjacent cable body 1. An elastic component 4 is provided inside the connecting ring 3. One end of the elastic component 4 is fixedly connected to the inner side of the connecting ring 3, and the other end is connected to a pressure block 5. An elastic ball component 6 is protruding on the end face of the pressure block 5 away from the elastic component 4. In the initial state, the pressure block 5 is pushed by the elastic component 4 so that the elastic ball component 6 abuts against the sleeved connecting piece 2. The connecting ring 3 slides along the connecting piece 2 to adjust the spacing between adjacent cable bodies 1. When the connecting piece 2 deflects, it presses against the elastic ball component 6 so that the pressure block 5 is pressed tightly against the sleeved connecting piece 2.

[0039] This invention is based on existing heating cable structures, such as mineral-insulated heating cables, and includes a cable body 1. Specifically, it also includes connecting pieces 2 connected to both sides of the cable body 1. A connecting ring 3 is connected to the end of each connecting piece 2 furthest from the cable body 1. The connecting pieces 2 between adjacent cable bodies 1 are staggered; that is, one connecting piece 2 is located slightly above the center of the cable body 1, with the corresponding connecting ring 3 facing downwards, while the other connecting piece 2 is located slightly below the center of the cable body 1, with the corresponding connecting ring 3 facing upwards. This allows the connecting ring 3 to fit onto the connecting pieces 2 on adjacent cable bodies 1, preventing them from easily coming undone during normal use. This forms a multi-connected heating cable with multiple self-connecting cable bodies 1. An elastic component 4 is provided inside the connecting ring 3. One end of the elastic component 4 is fixedly connected to the inner side of the connecting ring 3, and the other end is connected to a pressure block 5. The pressure block 5 is located away from the elastic component 3. One end face of the elastic component 4 is provided with an elastic ball assembly 6. The elastic component 4 can be an existing elastic component such as a spring. In the initial state, the elastic component 4 pushes the pressure block 5 so that the elastic ball assembly 6 abuts against the sleeved connecting piece 2. As the elastic ball assembly 6 rolls against the sleeved connecting piece 2, it slides along the connecting piece 2 through the connecting ring 3, which is used to easily adjust the spacing between adjacent cable bodies 1, forming a multi-connected heating cable with easily and flexibly adjustable density. After adjustment, the multi-connected heating cable is directly wound around the pipe. At this time, the connecting piece 2 will deflect, thereby pressing against the elastic ball assembly 6, so that the pressure block 5 is pressed tightly against the sleeved connecting piece 2. This increases the resistance to sliding between the connecting piece 2 and the connecting ring 3, preventing the displacement or twisting of each cable body 1 after winding, which is conducive to the stable winding and use of the cable body 1.

[0040] In embodiments of the present invention, such as Figure 1 , Figure 2 , Figure 3 As shown, the connecting piece 2 is rotatably connected to both sides of the cable body 1. Specifically, the cable body 1 has hinge seats 7 on both sides, and the end of the connecting piece 2 is rotatably connected to the hinge seat 7. A spring-loaded part 8 is provided at the rotatable connection point. The spring-loaded part 8 can be an existing elastic component such as a spring, torsion spring, or spring sheet. Figure 3 As shown, the spring return section 8 uses L-shaped spring pieces located on both sides of the connecting piece 2.

[0041] In embodiments of the present invention, such as Figure 1 , Figure 2 , Figure 3 As shown, the elastic ball assembly 6 includes a ball seat 61 elastically connected to the end face of the pressure block 5. A ball 62 is rotatably connected to the ball seat 61. The ball seat 61 can elastically extend or retract along the end face of the pressure block 5. In the initial state, the ball seat 61 pops out and the ball 62 abuts against the sleeved connecting piece 2. Through rolling abutment, the connecting ring 3 can be easily slid and adjusted along the connecting piece 2.

[0042] In embodiments of the present invention, such as Figure 1 , Figure 2 , Figure 3 As shown, the end face of the pressure block 5 away from the elastic component 4 is treated with a frosted finish, and the side of the connecting piece 2 facing the pressure block 5 is treated with a frosted finish. The frosting finish can be achieved by existing methods such as surface sandblasting passivation, surface chemical corrosion passivation, or surface mechanical grinding passivation.

[0043] Thus, in the initial state, such as Figure 1 , Figure 2 , Figure 3 As shown, each cable body 1 is placed horizontally, and the spring-loaded part 8 pushes the connecting piece 2 to also be in a horizontal state. The elastic ball assembly 6 abuts against the sleeved connecting piece 2. When the cable body 1 is lifted one by one and wound around the pipe, as... Figure 9 , Figure 10 As shown, the connecting piece 2 deflects, the elastic deformation of the rebound part 8 is applied to the deflected connecting piece 2, and the connecting piece 2 naturally presses against the elastic ball assembly 6. The ball seat 61 retracts, so that the connecting piece 2 and the pressure block 5 are pressed together. The connecting piece 2 adopts a sheet-like structure and has a certain elastic deformation capability, which is conducive to the matte surface of the connecting piece 2 and the pressure block 5 to fit together and press together, increasing the frictional resistance, making it difficult for the connecting piece 2 and the connecting ring 3 to slide easily, avoiding the displacement of each cable body 1 during winding. At the same time, if the cable body 1 is twisted during winding, it is equivalent to the connecting piece 2 deflecting relative to the cable body 1, which also makes the matte surface of the connecting piece 2 and the pressure block 5 fit together and press together, which is conducive to the stable winding and use of the cable body 1. In addition, during the storage or transportation of multiple cable bodies 1, conventional heating cables are simply stacked, and the heavier cables lack protection. Moreover, the original cylindrical cables are prone to rolling and displacement in the stack. In this invention, as Figure 13 , Figure 14 As shown, the cable bodies 1 of each layer are stacked in an alternating manner. The upper cable body 1 is pressed against the middle of the lower connecting piece 2. The bottom connecting piece 2 is deformed by weight, which will also press against the elastic ball assembly 6, so that the connecting piece 2 and the pressure block 5 are pressed together, preventing the cable bodies 1 from shifting. The middle connecting piece 2 also plays a buffering and protective role, making the product transportation and storage safer and more stable.

[0044] In embodiments of the present invention, such as Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8As shown, the connecting ring 3 includes a first half-ring 31 and a second half-ring 32. One end of the first half-ring 31 is rotatably connected to one end of the second half-ring 32. A limiting groove 9 is formed at the other end of the first half-ring 31. A spring tongue 10 is provided at the other end of the second half-ring 32. One end of the spring tongue 10 is elastically connected to the second half-ring 32, and the other end is connected to a limiting wedge 11. Figure 6 , Figure 7 , Figure 8 The diagram shows a top view of the connection between the limiting groove 9 and the limiting wedge 11. In the initial state, the limiting wedge 11 is inserted into the limiting groove 9 to connect the first half-ring 31 and the second half-ring 32. The first half-ring 31 and the second half-ring 32 are stably connected to form a complete circular structure. A pin 12 is fixedly connected to one end of the spring tongue 10 that penetrates into the second half-ring 32. In the initial state, the spring tongue 10 pushes the pin 12 out of the second half-ring 32. A protruding edge 13 is provided on the end of the connecting ring 3 away from the pin 12, thereby allowing it to wrap around the ring. At the end, pull the cable body 1 until the adjacent connecting rings 3 collide with each other. The protruding edge 13 abuts against the push pin 12, and the push pin 12 pushes the limiting wedge block 11 inward so that the limiting wedge block 11 moves out of the limiting groove 9, so that one end of the second half ring 32 is loosened and separated from the first half ring 31, which facilitates the removal of the excess cable body 1. Only the connecting pieces 2 between the first and last cable bodies 1 are interconnected, and then the corresponding first half ring 31 and second half ring 32 are fastened together so that the connecting ring 3 is sleeved on the connecting piece 2, completing the stable winding of the entire pipe.

[0045] Preferably, one end of the elastic component 4 is fixedly connected to the inner side of the first semi-ring 31, and a flat groove 33 is provided on the inner side of the second semi-ring 32. The elastic ball component 6 protrudes into the flat groove 33 and abuts against the sleeved connecting piece 2, thereby pushing the pin 12 so that when the first semi-ring 31 and the second semi-ring 32 are loosened, such as... Figure 5 As shown, the elastic component 4 pushes outward, which facilitates the automatic rotation and separation of the second half-ring 32.

[0046] The inner end face of the flat groove 33 is frosted, and the side of the connecting piece 2 facing the flat groove 33 is frosted. This allows the connecting piece 2 to rotate in different directions, such as... Figure 11 , Figure 12 As shown, both can press against the elastic ball assembly 6 to make the connecting piece 2 fit and press tightly against the flat groove 33, making it difficult for the connecting piece 2 and the connecting ring 3 to slide easily, avoiding displacement or twisting of each cable body 1 during winding, which is conducive to the stable winding and use of the cable body 1.

[0047] The present invention also provides a method for using a multi-connected heating cable, comprising the following steps:

[0048] In the initial state, each cable body 1 is placed horizontally, and the elastic ball assembly 6 abuts against the sleeved connecting piece 2. The connecting ring 3 slides along the connecting piece 2 to adjust the spacing between adjacent cable bodies 1, forming a multi-connected heating cable with adjustable density.

[0049] After adjustment, the multi-connected heating cable is wound around the pipe, and the connecting piece 2 deflects, thereby pressing against the elastic ball assembly 6, so that the pressure block 5 is pressed tightly on the sleeved connecting piece 2, increasing the resistance to sliding between the connecting piece 2 and the connecting ring 3, and preventing the cable body 1 from shifting or twisting after winding.

[0050] Preferably, when storing or transporting multi-layer heating cables, the cable bodies 1 of each layer are stacked in an alternating manner, with the upper cable body 1 pressed against the middle of the lower connecting piece 2. The bottom connecting piece 2 is deformed by weight, thereby pressing against the elastic ball bearing assembly 6, so that the connecting piece 2 and the pressure block 5 are pressed together, increasing the resistance to sliding between the connecting piece 2 and the connecting ring 3, and preventing each cable body 1 from shifting.

[0051] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0052] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A multi-connected heating cable, comprising a cable body (1), characterized in that, Also includes: Connecting piece (2) is connected to both sides of the cable body (1). A connecting ring (3) is connected to one end of the connecting piece (2) away from the cable body (1). The connecting pieces (2) between adjacent cable bodies (1) are staggered so that the connecting ring (3) is respectively sleeved on the connecting piece (2) on the adjacent cable body (1). An elastic component (4) is disposed inside the connecting ring (3). One end of the elastic component (4) is fixedly connected to the inner side of the connecting ring (3), and the other end is connected to a pressure block (5). An elastic ball component (6) is protruding on the end face of the pressure block (5) away from the elastic component (4). In the initial state, the elastic component (4) pushes the pressure block (5) so that the elastic ball component (6) abuts against the sleeved connecting piece (2). The connecting ring (3) slides along the connecting piece (2) to adjust the spacing between adjacent cable bodies (1). When the connecting piece (2) deflects, it presses against the elastic ball component (6) so that the pressure block (5) is pressed tightly against the sleeved connecting piece (2).

2. The multi-connected heating cable according to claim 1, characterized in that, The connecting piece (2) is rotatably connected to both sides of the cable body (1), and a spring-back part (8) is provided at the rotatable connection.

3. A multi-connected heating cable according to claim 2, characterized in that, The cable body (1) is provided with hinge seats (7) on both sides. The end of the connecting piece (2) is rotatably connected to the hinge seat (7). The spring part (8) is an L-shaped spring piece located on both sides of the end of the connecting piece (2) inside the hinge seat (7).

4. A multi-connected heating cable according to claim 1, characterized in that, The elastic ball assembly (6) includes a ball seat (61) elastically connected to the end face of the pressure block (5), and a ball (62) is rotatably connected to the ball seat (61), the ball (62) abutting against the sleeved connecting piece (2).

5. A multi-connected heating cable according to claim 1, characterized in that, The end face of the pressure block (5) away from the elastic component (4) is frosted, and the side of the connecting piece (2) facing the pressure block (5) is frosted.

6. A multi-connected heating cable according to claim 1, characterized in that, The connecting ring (3) includes a first half-ring (31) and a second half-ring (32). One end of the first half-ring (31) is rotatably connected to one end of the second half-ring (32). A limiting groove (9) is provided at the other end of the first half-ring (31). A spring tongue (10) is provided at the other end of the second half-ring (32). One end of the spring tongue (10) is elastically connected to the second half-ring (32), and the other end is connected to a limiting wedge (11). The limiting wedge (11) is inserted into the limiting groove (9) and is used to connect the first half-ring (31) and the second half-ring (32). Ring (32), the end of the spring tongue (10) that enters the second half ring (32) is fixedly connected to a pin (12). In the initial state, the spring tongue (10) pushes the pin (12) out of the second half ring (32). The end of the connecting ring (3) away from the pin (12) is provided with a protruding edge (13). When adjacent connecting rings (3) collide, the protruding edge (13) pushes against the pin (12). The pin (12) drives the limiting wedge (11) to retract inward so that the limiting wedge (11) moves out of the limiting groove (9).

7. A multi-connected heating cable according to claim 6, characterized in that, One end of the elastic component (4) is fixedly connected to the inner side of the first half ring (31), and a flat groove (33) is provided on the inner side of the second half ring (32). The elastic ball component (6) protrudes into the flat groove (33) and is used to abut against the sleeved connecting piece (2).

8. A multi-connected heating cable according to claim 7, characterized in that, The inner end face of the flat groove (33) is frosted, and the side of the connecting piece (2) facing the flat groove (33) is frosted.

9. A method of using a multi-connected heating cable, wherein the method employs a multi-connected heating cable as described in any one of claims 1-8, characterized in that, Includes the following steps: In the initial state, each cable body (1) is placed horizontally, and the elastic ball assembly (6) abuts against the sleeved connecting piece (2). The connecting ring (3) slides along the connecting piece (2) to adjust the spacing between adjacent cable bodies (1) to form a multi-connected heating cable with adjustable density. After adjustment, the multi-connected heating cable is wound around the pipe, and the connecting piece (2) deflects, thereby pressing against the elastic ball assembly (6) so that the pressure block (5) is pressed tightly on the sleeved connecting piece (2), increasing the resistance to sliding between the connecting piece (2) and the connecting ring (3), and preventing the cable body (1) from shifting or twisting after winding.

10. A method of using a multi-connected heating cable according to claim 9, characterized in that: When storing or transporting multi-layer heating cables, the cable bodies (1) of each layer are stacked in an alternating manner. The upper cable body (1) is pressed against the middle of the lower connecting piece (2). The bottom connecting piece (2) is deformed by weight, thereby pressing against the elastic ball assembly (6) so that the connecting piece (2) and the pressure block (5) are pressed together, increasing the resistance to sliding between the connecting piece (2) and the connecting ring (3) and preventing the cable bodies (1) from shifting.

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