An impact-resistant cable and a method of making the same

Abstract

The application provides an anti-impact cable and a preparation method thereof, and relates to the technical field of cables. The anti-impact cable and the preparation method thereof comprise a core wire, an insulation layer arranged on the outer surface of the core wire, and a buffer layer arranged on the outer surface of the insulation layer. The buffer layer has a first storage chamber and a second storage chamber which are in communication with each other, and the interiors of the first storage chamber and the second storage chamber are filled with buffer liquid. When the cable is impacted, the buffer liquid in the interior of one of the storage chambers is subjected to extrusion impact and enters the interior of the other storage chamber. By arranging the buffer layer on the outer surface of the insulation layer and arranging an outer surface layer on the outer surface of the buffer layer, the user can conveniently fill the buffer liquid into the interiors of the first flow guide chamber, the second flow guide chamber, the first storage chamber and the second storage chamber formed in the buffer layer. When the cable is impacted, the impact force received by the cable can be buffered by the buffer liquid. Moreover, the buffer liquid can also dissipate heat and cool the core wire during the use of the cable.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to an impact-resistant cable and its preparation method. Background Technology

[0002] A cable is a conductor consisting of one or more insulated cores and an outer sheath. It is widely used in power systems, information transmission systems, and mechanical instrumentation systems. With technological advancements, the application range and environments of cables have become more complex, making them more susceptible to impacts during use. When subjected to impact, the outer sheath can compress the inner insulated cores, causing damage and ultimately resulting in cable failure.

[0003] Chinese Patent CN213877632U discloses an impact-resistant cable, including a conductor, a buffer covering the conductor, and a protective layer covering the buffer. The buffer includes an inner sheath and a protective layer sleeved on the outer side of the inner sheath. The buffer is made of an elastic material. The buffer includes an inner sheath, an outer sheath sleeved on the outer side of the inner sheath, and multiple buffer portions connected between the inner and outer sheaths. The conductor is disposed within the inner sheath, and the protective layer covers the outer side of the outer sheath. The buffer portions are necked in the middle and are evenly distributed within the cavity formed by the inner and outer sheaths. The space between each pair of adjacent buffer portions forms a buffer cavity. The line connecting the center of any buffer portion to the center of the inner sheath passes through the center of a buffer cavity. The protective layer has multiple buffer holes inside, with each buffer hole corresponding to one buffer portion.

[0004] However, the above technical solution still has the following drawbacks: the buffer cavity in the buffer component is easily damaged when subjected to impact force, resulting in a reduction in impact resistance. Summary of the Invention

[0005] The purpose of this invention is to provide an impact-resistant cable and its preparation method, aiming to solve the problem that existing impact-resistant cables are easily damaged, affecting their impact resistance.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: the impact-resistant cable and its preparation method include: Core wire; Insulation layer, installed on the outer surface of the core wire; A buffer layer is installed on the outer surface of the insulation layer. The buffer layer has a first storage chamber and a second storage chamber that are interconnected. Both the first storage chamber and the second storage chamber are filled with buffer solution. When the cable is impacted, the buffer solution inside one of the storage chambers is squeezed and enters the other storage chamber. An outer layer, installed on the outer surface of the buffer layer, is used to seal the first and second storage chambers.

[0007] A further technical solution of the present invention is that the buffer layer includes a sleeve fitted onto the outer surface of the insulating layer, and a first support ring and a second support ring are fixedly connected to the outer surface of the sleeve. The first support ring is located at both ends of the sleeve, and the second support ring is located between the two first support rings.

[0008] A further technical solution of the present invention is that the buffer layer includes a sleeve fitted onto the outer surface of the insulating layer, and a first support ring and a second support ring are fixedly connected to the outer surface of the sleeve. The first support ring is located at both ends of the sleeve, and the second support ring is located between the two first support rings.

[0009] A further technical solution of the present invention is that the gap between the first support ring and the adjacent second support ring is divided into a first flow chamber and a second flow chamber for storing buffer solution by a first partition, and the gap between two adjacent second support rings is divided into a first storage chamber and a second storage chamber for storing buffer solution by a second partition. The first flow chamber and the first storage chamber are interconnected, and the second flow chamber and the second storage chamber are interconnected. The second support ring, the first partition and the second partition are all made of flexible material.

[0010] A further technical solution of the present invention is that the buffer layer further includes a plurality of third support rings sleeved on the outer surface of the sleeve, and the plurality of third support rings are connected to each other and to the first support ring by two elastic members.

[0011] A further technical solution of the present invention is that a collar is sleeved on the outer surface of the sleeve, the collar is located between two adjacent second support rings, and the collar is made of a flexible hollow material.

[0012] A further technical solution of the present invention is that reinforcing strips for strengthening are fixedly connected to both sides of the inner wall of the second support ring, and connecting strips for connecting the inner wall of the first support ring and the edges of both sides of the second support ring are fixedly connected to the outer surface layer.

[0013] A further technical solution of the present invention is that the third support ring has the same structure as the second support ring.

[0014] A further technical solution of the present invention is that the insulating layer is made of one of polyethylene, silicone rubber and polyolefin.

[0015] A method for preparing an impact-resistant cable, characterized by comprising: An insulating layer is sleeved on the outer surface of the wire core; A buffer layer is installed on the outer surface of the insulation layer by bonding or welding. The outer surface layer is also installed on the outer surface of the buffer layer by bonding or welding, and the buffer solution is filled into the interior of the buffer layer at the same time as the outer surface layer is installed. The buffer layer has a first storage chamber and a second storage chamber that are interconnected, and both the first and second storage chambers are filled with buffer solution. When the cable is impacted, the buffer solution inside one of the storage chambers is squeezed and enters the other storage chamber.

[0016] The beneficial effects of this invention are: By setting a buffer layer on the outer surface of the insulation layer and an outer surface layer on the outer surface of the buffer layer, users can easily fill the first flow-conducting chamber, the second flow-conducting chamber, the first storage chamber and the second storage chamber formed inside the buffer layer with buffer solution. When the cable is subjected to impact, the buffer solution will buffer the impact force it receives, thereby protecting the core wire. In addition, the buffer solution can also dissipate heat and cool the core wire during cable use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal structure of the first embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of the first support ring in a specific embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the internal structure of the second embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of the internal structure of the third embodiment of the present invention.

[0022] In the diagram: 1-core wire, 2-insulation layer, 3-buffer layer, 31-sleeve, 32-first support ring, 321-annular groove, 322-guide hole, 33-second support ring, 331-through hole, 34-first partition, 341-first guide chamber, 342-second guide chamber, 35-second partition, 351-first storage chamber, 352-second storage chamber, 36-connecting strip, 37-third support ring, 38-elastic element, 39-ring, 4-outer layer. Detailed Implementation

[0023] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0024] like Figure 1-2 As shown, an impact-resistant cable includes a core wire 1, an insulation layer 2 sleeved on the outer surface of the core wire 1, a buffer layer 3 sleeved on the outer surface of the insulation layer 2 for buffering the impact force received by the cable, and an outer layer 4 sleeved on the outer surface of the buffer layer 3.

[0025] Core wire 1 is made of pure copper, and there may be one or more core wires 1.

[0026] The insulating layer 2 is made of one of polyethylene, silicone rubber, or polyolefin.

[0027] The outermost layer 4 is made of low-smoke halogen-free polyolefin.

[0028] like Figure 1-3 As shown, this is a first embodiment of the buffer layer 3 of the present invention. The buffer layer 3 includes a sleeve 31 sleeved on the outer surface of the insulating layer 2. A first support ring 32 and a second support ring 33 are fixedly connected to the outer surface of the sleeve 31. The first support ring 32 and the second support ring 33 can provide preliminary support for the outer surface layer 4. There are two first support rings 32, which are located at the two ends of the sleeve 31 respectively. There are five second support rings 33, which are evenly distributed between the two first support rings 32. It can be imagined that the number of second support rings 33 can be one, two, six or even more. The first support ring 32 has an annular groove 321 inside. The first support ring 32 has two guide holes 322 that communicate with the annular groove 321 on the side near the second support ring 33. The two guide holes 322 are symmetrically distributed about the axis of the sleeve 31. Each second support ring 33 has two through holes 331 inside. The two through holes 331 and the two guide holes 322 are on the same axis. It can be imagined that the number of guide holes 322 and through holes 331 can be three, four or even more, and the guide holes 322 and through holes 331 may not be on the same axis. Two first partitions 34 are fixedly connected between the first support ring 32 and the adjacent second support ring 33. The first partitions 34 divide the gap between the first support ring 32 and the second support ring 33 into a first flow chamber 341 and a second flow chamber 342 for storing buffer solution. Two second partitions 35 are fixedly connected between two adjacent second support rings 33. The second partitions 35 divide the gap between two adjacent second support rings 33 into a first storage chamber 351 and a second storage chamber 352 for storing buffer solution. The first flow chamber 341 is interconnected with the first storage chamber 351 through a through hole 331. The second flow chamber 342 is also interconnected with the second storage chamber 352 through a through hole 331. The second support ring 33, the first partitions 34 and the second partitions 35 are all made of flexible material and can deform when subjected to impact. The inner walls of the second support ring 33 are fixedly connected to both sides of the reinforcing strip 332 for strengthening it. The inner walls of the first support ring 32 and the edges of both sides of the second support ring 33 are fixedly connected to the connecting strip 36 for connecting them. The connecting strip 36 is also used to support the outer layer 4. The connecting strip 36 is in groups of two, and the two connecting strips 36 in each group are circumferentially distributed with the first partition 34 or the second partition 35. In use, the outer layer 4 is first fitted onto the outer surface of the buffer layer 3, and buffer solution is filled inside the first flow chamber 341, the second flow chamber 342, the first storage chamber 351, and the second storage chamber 352. When one side of the first flow chamber 341 and the first storage chamber 351 is impacted, the second support ring 33 and the second partition 35 deform, causing the internal space of one of the first storage chambers 351 to shrink and the internal space of the opposite second storage chamber 352 to increase. The buffer solution inside the first storage chamber 351, whose internal space has shrunk, enters the first flow chamber 341 and enters the second flow chamber 342 through the flow hole 322, thereby entering the interior of the second storage chamber 352, which has increased in internal space, in order to achieve the purpose of buffering the impact force received by the cable. In addition, the buffer solution can also dissipate heat from the core wire 1.

[0029] In this specific embodiment, by providing a buffer layer 3 on the outer surface of the insulation layer 2 and an outer surface layer 4 on the outer surface of the buffer layer 3, it is convenient for the user to fill the first flow guiding chamber 341, the second flow guiding chamber 342, the first storage chamber 351 and the second storage chamber 352 formed inside the buffer layer 3 with buffer solution, so that when the cable is impacted, the impact force it receives is buffered by the buffer solution, thereby protecting the core wire 1.

[0030] like Figure 4As shown, this is a second embodiment of the buffer layer 3 of the present invention. The difference from the first embodiment is that the buffer layer 3 further includes five third support rings 37 sleeved on the outer surface of the sleeve 31. The five third support rings 37 are connected to each other and to the first support ring 32 by two elastic members 38. The two elastic members 38 are symmetrically distributed and are either springs or elastic bars. Compared with the first embodiment, in this embodiment, when the cable is impacted, the buffer layer drives the two third support rings 37 at the impact point to move in opposite directions, so that the elastic members 38 connecting the two third support rings 37 generate a force in the opposite direction to cancel out the force generated during the impact. Moreover, it can automatically return to its original position after the impact is completed, thus achieving a better protection effect.

[0031] like Figure 5 As shown, this is the third embodiment of the buffer layer 3 of the present invention. The difference from the first embodiment is that there are three second support rings 33, and a collar 39 is sleeved on the outer surface of the sleeve 31. The collar 39 is slidably connected between two adjacent second support rings 33. The collar 39 is made of flexible hollow material. Compared with the first embodiment, when the cable is impacted, the hollow collar 39 can absorb and offset the impact force received by the buffer through deformation, and can also automatically recover after the impact is completed, thus achieving a better protection effect.

[0032] A method for preparing an impact-resistant cable, comprising: An insulating layer 2 is sleeved on the outer surface of the wire core 1; The buffer layer 3 is installed on the outer surface of the insulating layer 2 by means of bonding or welding. The outer surface layer 4 is also installed on the outer surface of the buffer layer 3 by bonding or welding, and the buffer solution is filled into the interior of the buffer layer 3 at the same time as the outer surface layer 4 is installed. The buffer layer 3 has a first storage chamber 351 and a second storage chamber 352 that are interconnected, and both the first storage chamber 351 and the second storage chamber 352 are filled with buffer solution. When the cable is impacted, the buffer solution inside one of the storage chambers is squeezed and enters the interior of the other storage chamber.

Claims

1. An impact-resistant cable, characterized in that, include: Core wire; Insulation layer, installed on the outer surface of the core wire; A buffer layer is installed on the outer surface of the insulation layer. The buffer layer has a first storage chamber and a second storage chamber that are interconnected. Both the first and second storage chambers are filled with buffer solution. When the cable is impacted, the buffer solution inside one of the storage chambers is squeezed and impacted into the interior of the other storage chamber. An outer layer, installed on the outer surface of the buffer layer, is used to seal the first and second storage chambers; The buffer layer includes a sleeve fitted onto the outer surface of the insulating layer. A first support ring and a second support ring are fixedly connected to the outer surface of the sleeve. The first support ring is located at both ends of the sleeve, and the second support ring is located between the two first support rings. The gap between the first support ring and the adjacent second support ring is divided by the first partition into a first flow chamber and a second flow chamber for storing buffer solution. The gap between two adjacent second support rings is divided by the second partition into a first storage chamber and a second storage chamber for storing buffer solution. The first flow chamber and the first storage chamber are interconnected, and the second flow chamber and the second storage chamber are interconnected. The second support ring, the first partition, and the second partition are all made of flexible material. The first support ring has an annular groove inside. The first support ring has two guide holes that communicate with the annular groove on the side near the second support ring. The two guide holes are symmetrically distributed with the axis of the sleeve as the axis of symmetry. Each second support ring has two through holes inside. The two through holes and the two guide holes are on the same axis. The buffer layer also includes multiple third support rings fitted onto the outer surface of the sleeve. The multiple third support rings are connected to each other and to the first support ring through two elastic elements. The buffer causes the two third support rings at the impact point to move in opposite directions, so that the elastic elements connecting the two third support rings generate a force in the opposite direction to cancel out the force generated during the impact, and automatically return to their original positions after the impact is completed.

2. The impact-resistant cable according to claim 1, characterized in that, The outer surface of the sleeve is fitted with a collar, which is located between two adjacent second support rings. The collar is made of flexible hollow material.

3. The impact-resistant cable according to claim 1, characterized in that, The inner walls of the second support ring are fixedly connected to both sides with reinforcing strips for strengthening them. The inner walls of the first support ring and the edges of both sides of the second support ring are fixedly connected with connecting strips for connecting them. The connecting strips are also used to support the outer surface layer.

4. The impact-resistant cable according to claim 1, characterized in that, The third support ring has the same structure as the second support ring.

5. An impact-resistant cable according to any one of claims 1-4, characterized in that, The insulating layer is made of one of polyethylene, silicone rubber, or polyolefin.

6. The method for preparing an impact-resistant cable according to claim 1, characterized in that, include: An insulating layer is sleeved on the outer surface of the core wire; A buffer layer is installed on the outer surface of the insulating layer by means of bonding or welding. The outer surface layer is also installed on the outer surface of the buffer layer by bonding or welding, and the buffer layer is filled with buffer solution at the same time as the outer surface layer is installed. The buffer layer has a first storage chamber and a second storage chamber that are interconnected, and both the first and second storage chambers are filled with buffer solution. When the cable is impacted, the buffer solution inside one of the storage chambers is squeezed and enters the other storage chamber.

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