Compression-resistant shock-absorbing crosslinked polyethylene insulated cable

Abstract

The application relates to the technical field of power cables, and discloses a compression-resistant and shock-absorbing cross-linked polyethylene insulated cable which comprises limiting strips, locking rings, winding sleeves and elastic connecting mechanisms, a plurality of the limiting strips are fixedly connected in a circle on an insulating layer, the locking rings are detachably arranged outside the insulating layer, gaps exist between the winding sleeves and the insulating layer, the winding sleeves and the locking rings are connected through the elastic connecting mechanisms, one side of the locking ring far from the winding sleeve is in contact with an external environment, when the winding sleeve is extruded and vibrated by the external environment, the elastic connecting mechanisms can absorb the shock of the cable body, the elastic connecting mechanisms comprise springs and tightening and contracting assemblies, the distance between the winding sleeve and the locking ring can be adjusted through the tightening and contracting assemblies, so that the length and the elastic force of the springs are adjusted, and the above technical scheme is used to solve the problems of the insufficient extrusion resistance and shock resistance of the outer layer of the power cable in the prior art.

Description

Technical Field

[0001] This invention relates to the field of power cable technology, specifically to a cross-linked polyethylene insulated cable with compression resistance and shock absorption. Background Technology

[0002] In special environments with complex terrains such as mines, underground pipelines, and mountainous areas, laid cables often face special conditions such as continuous vibration and external compression. This places high demands on the stability and structural strength of the cables. Currently, the insulation material of power cables mostly uses cross-linked polyethylene, which has advantages such as good voltage resistance, high mechanical strength, and high heat resistance compared to traditional insulation materials. It can maintain stable insulation performance in relatively complex environments and is suitable for the use needs of various special scenarios.

[0003] However, in environments such as mines and construction sites, power cables may be subjected to mechanical forces such as falling rocks, crushing equipment, and soil subsidence. Moving equipment can also cause dragging and scratching of the cables. At the same time, the movement of equipment and vehicles can cause continuous vibration. The insulation layer has a certain mechanical strength but lacks shock absorption capacity. Under long-term pressure and vibration, the insulation layer is prone to damage such as dents and cracks, which may lead to insulation failure. Summary of the Invention

[0004] This invention proposes a compression-resistant and shock-absorbing cross-linked polyethylene insulated cable to solve the problem of insufficient compression resistance and shock resistance of the outer layer of power cables in the prior art.

[0005] The technical solution of the present invention is as follows: A compression-resistant and shock-absorbing cross-linked polyethylene insulated cable includes a cable body with an insulation layer, and further includes limiting strips, a locking ring, a winding sleeve, and an elastic connecting mechanism. Multiple limiting strips are circumferentially fixed to the insulation layer. The locking ring is detachably sleeved on the outside of the insulation layer and detachably connected to the limiting strips. The winding sleeve is sleeved on the outside of the locking ring, with a gap between the winding sleeve and the insulation layer. The winding sleeve and the locking ring are connected by multiple elastic connecting mechanisms. The side of the winding sleeve furthest from the locking ring is in contact with the external environment. When the winding sleeve is subjected to external compression and vibration, it can protect the cable body. The elastic connecting mechanism can absorb shock from the cable body. The elastic connecting mechanism includes a spring and a tightening and contracting assembly. The tightening and contracting assembly can adjust the distance between the winding sleeve and the locking ring, thereby adjusting the length and elastic force of the spring. As an external protection for the cable body, the winding sleeve resists friction and compression from heavy objects. When the winding sleeve is subjected to compression and vibration, the elastic buffer of the elastic connection mechanism can cushion the cable body. When compressed, the winding sleeve deforms, but the support of the locking ring by the elastic connection mechanism prevents the cable body from contacting the winding sleeve, thus avoiding damage to the cable body caused by compression from heavy objects.

[0006] The locking ring is a detachable elastic ring. After being fitted onto the insulating layer, the first docking component is docked to complete the fixation. Similarly, the second docking component is provided on the winding sleeve for connecting and fixing the winding sleeve. The winding sleeve is made of an elastic material that will deform when compressed. It is elastically connected and fixed through an elastic connection mechanism.

[0007] The locking ring has multiple slots on the side near the insulation layer. When the locking ring is fitted onto the cable body, the limiting strip engages with the slots. The locking ring also has a mating component for securing it to the cable body. The slots allow the locking ring to bend easily, and the engagement of the slots with the limiting strip prevents the locking ring from twisting on the insulation layer.

[0008] The elastic connection mechanism further includes a first receiving seat and a second receiving seat. The first receiving seat is disposed on the locking ring, and the spring and the tightening and shrinking assembly are fixedly connected to the first receiving seat. The second receiving seat is disposed on the winding sleeve, and the spring is fixedly connected to the second receiving seat. The tightening and shrinking assembly is rotatably connected to the second receiving seat, and the spring is wound around the tightening and shrinking assembly.

[0009] The tightening and shrinking assembly includes a torsion limiting component and traction lines. The torsion limiting component is disposed on the second receiving seat. Multiple traction lines are connected at both ends to the first receiving seat and the torsion limiting component, respectively. When the torsion limiting component is rotated, the multiple traction lines can rotate along with it. The tightening and shrinking assembly of this invention uses a ratchet device. The traction lines are connected to the ratchet, and rotating the ratchet can twist the traction lines. When the multiple traction lines are not twisted, there is a certain gap between them. When the multiple traction lines twist each other, the distance between their ends shortens, pulling the first receiving seat and the second receiving seat closer together.

[0010] The multiple traction lines are arranged in parallel. When the torsion limiting component drives the traction lines to rotate, the multiple traction lines twist and intertwine with each other. When the multiple traction lines twist together, they can pull the first and second receiving seats closer to each other. At this time, the spring is compressed, and the elastic force increases.

[0011] When the winding sleeve is compressed or vibrated, the multiple springs can extend, retract, or bend, and the traction line can bend along with the springs. Because the traction line is made of a flexible material, it can still bend after twisting, thus adjusting the spring's elasticity without affecting its bending.

[0012] The take-up sleeve is provided with a butt buckle and a lap groove at both ends along the axial direction of the cable body. The butt buckle on one take-up sleeve is connected to the lap groove on another take-up sleeve to connect the two take-up sleeves. Depending on the actual use environment, multiple take-up sleeves and locking rings can be provided on the cable body. The take-up sleeves are connected to each other to form a complete sheath to protect the cable body.

[0013] The working principle and beneficial effects of this invention are as follows: 1. In this invention, an elastic connection mechanism is set to make the winding sleeve and the locking ring elastically connected. When the winding sleeve is squeezed and vibrated, the contraction and shaking of the elastic connection mechanism can buffer the vibration. When squeezed, the elastic connection mechanism can prevent the cable body from contacting the winding sleeve, thus protecting the cable body. At the same time, the spring force can be adjusted by tightening the contraction component, which can be adjusted according to different environments. 2. In this invention, a locking ring can be used to fix the winding sleeve to the cable body. The locking ring supports the winding sleeve through a spring. At the same time, the spring force can be adjusted by tightening the shrinking assembly. When there is a lot of vibration in the environment, the spring force can be reduced, making the spring easier to bend and shrink, thus better damping the vibration. When there is a high risk of being crushed by heavy objects in the environment, the spring force can be increased, allowing the spring to better support the winding sleeve and improve the protection capability of the cable body. Compared with traditional cable sheaths, this application can adjust the protection of the cable body according to different special environments, and can be easily connected and separated. It can be selectively set on the cable body. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural diagram from another perspective of the overall structure of the present invention; Figure 3 This is a schematic diagram of the structure in which the limiting strip and the locking ring cooperate in this invention; Figure 4 This is a partial structural diagram of the cooperation between the overlap groove and the winding sleeve in this invention; Figure 5 This is a partial structural diagram of the cooperation between the tightening and shrinking assembly and the receiving seat in this invention; Figure 6 This is a partial cross-sectional view of the screwing and tightening assembly and the spring in this invention.

[0016] In the diagram: 1. Cable body; 2. Insulation layer; 3. Limiting strip; 4. Locking ring; 5. Connecting component one; 6. Rewinding sleeve; 7. Connecting component two; 8. Spring; 9. Slot; 10. Receiver one; 11. Receiver two; 12. Torsion limiting component; 13. Traction line; 14. Connecting buckle; 15. Overlap groove. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] This embodiment proposes a compression-resistant and shock-absorbing cross-linked polyethylene insulated cable, such as... Figures 1-2As shown, the cable includes a cable body 1, an insulation layer 2, and also includes limiting strips 3, locking rings 4, a winding sleeve 6, and an elastic connecting mechanism. Multiple limiting strips 3 are circumferentially fixedly connected to the insulation layer 2. The locking ring 4 is detachably fitted onto the outside of the insulation layer 2 and is detachably connected to the limiting strips 3. The winding sleeve 6 is fitted onto the outside of the locking ring 4. Figure 3 As shown, there is a gap between the winding sleeve 6 and the insulation layer 2. The winding sleeve 6 and the locking ring 4 are connected by multiple elastic connection mechanisms. The side of the winding sleeve 6 away from the locking ring 4 is in contact with the external environment. When the winding sleeve 6 is subjected to external compression and vibration, the winding sleeve 6 can protect the cable body 1. The elastic connection mechanisms can also dampen the cable body 1. Figures 4-6 As shown, the elastic connection mechanism includes a spring 8 and a tightening and shrinking assembly. The distance between the winding sleeve 6 and the locking ring 4 can be adjusted by the tightening and shrinking assembly, thereby adjusting the length and elastic force of the spring 8. The winding sleeve 6 serves as the external protection of the cable body 1, resisting friction and compression by heavy objects. When the winding sleeve 6 is subjected to compression or vibration, the elastic buffer of the elastic connection mechanism can buffer the cable body 1. When compressed, the winding sleeve 6 deforms, but the support of the locking ring 4 by the elastic connection mechanism prevents the cable body 1 from contacting the winding sleeve 6, thus avoiding damage to the cable body 1 caused by compression by heavy objects.

[0019] The locking ring 4 has multiple slots 9 on the side near the insulation layer 2. When the locking ring 4 is fitted onto the cable body 1, such as Figures 3-4 As shown, the limiting strip 3 is connected to the slot 9. The slot 9 is opened on the inner side of the locking ring 4, which makes it easier to bend and more flexible when the locking ring 4 is put on the insulation layer 2. The locking ring 4 is provided with a docking part 5 for fixing the locking ring 4 on the cable body 1. The slot 9 makes the locking ring 4 easy to bend. At the same time, the docking of the slot 9 and the limiting strip 3 prevents the locking ring 4 from twisting on the insulation layer 2. The limiting strip 3 on the insulation layer 2 can also be used as a structure to resist friction when dragged on the ground, and protect the insulation layer 2.

[0020] like Figure 3 As shown, the locking ring 4 is a disconnectable elastic ring. The disconnection point can be connected through the docking component 5. After being sleeved on the insulating layer 2, the docking component 5 is then docked to complete the fixation. Similarly, the winding sleeve 6 is provided with a docking component 7. The disconnection point can be connected through the docking component 7 to connect and fix the winding sleeve 6. The winding sleeve 6 is made of an elastic material that will deform after being squeezed. It is elastically connected and fixed through an elastic connection mechanism.

[0021] The flexible connection mechanism also includes a first bearing seat 10 and a second bearing seat 11, such as Figure 6As shown, the receiving seat 10 is mounted on the locking ring 4, and a spring 8 and a tightening and retracting assembly are fixedly connected to the receiving seat 10, such as... Figure 5 As shown, the second receiving seat 11 is mounted on the take-up sleeve 6, and the spring 8 is fixedly connected to the second receiving seat 11. The tightening and shrinking assembly is rotatably connected to the second receiving seat 11, and the spring 8 is wound around the tightening and shrinking assembly. Since the first receiving seat 10 and the second receiving seat 11 are fixedly connected to the two ends of the spring 8 respectively, when the traction line 13 in the tightening and shrinking assembly twists and causes the length of the spring 8 to change, the spring 8 itself is not twisted, but only subjected to the change of the axial force of the spring 8, thus avoiding the generation of a torsional force between the first receiving seat 10 and the second receiving seat 11.

[0022] The tightening and shrinking assembly includes a torsion limiting component 12 and traction cables 13. The torsion limiting component 12 is mounted on the second receiving seat 11. The two ends of the multiple traction cables 13 are respectively connected to the first receiving seat 10 and the torsion limiting component 12. When the torsion limiting component 12 is rotated, the multiple traction cables 13 can rotate along with it. Figures 4-6 As shown, the tightening and shrinking assembly of this invention uses a ratchet device. The traction line 13 is connected to the ratchet, and the traction line 13 can be twisted when the ratchet is turned. The ratchet device is adjusted by rotating the bolt outside the winding sleeve 6. Figure 6 As shown, the bolt connected to the ratchet is located externally for easy adjustment. The ratchet device in this application can preferably be reset by pulling the bolt, which can avoid the ratchet being reset due to the bolt being squeezed during use. When the multiple traction lines 13 are not twisted, there is a certain gap between them. When the multiple traction lines 13 twist each other, the distance between the two ends is shortened, and the support seat 10 and support seat 2 11 are pulled closer to each other, thereby changing the length of the spring 8.

[0023] Multiple traction lines 13 are arranged in parallel, such as Figures 5-6 As shown, when the torsion limiting component 12 drives the traction wire 13 to rotate, multiple traction wires 13 twist and twist together. When multiple traction wires 13 twist together, they can pull the first receiving seat 10 and the second receiving seat 11 closer to each other. At this time, the spring 8 is compressed and the elastic force increases. In this application, there are four traction wires 13. When the traction wires 13 are not twisted by the ratchet device, the four traction wires 13 are kept in a parallel state. At this time, the spring 8 is the longest and the elastic force is the smallest. As the traction wires 13 twist, the length of the spring 8 gradually shortens and the elastic force gradually increases. As the elastic force of the spring 8 gradually increases, the change in force on the spring 8 when the winding sleeve 6 is squeezed by external force also decreases. Conversely, when the elastic force of the spring 8 is small, the slight compression and vibration received by the winding sleeve 6 can cause the spring 8 to extend and retract. Therefore, when there is a lot of vibration in the environment, the tension of the traction wire 13 can be adjusted to keep it in a small state, and when there is a lot of compression in the environment, the tension of the traction wire 13 can be adjusted to keep it in a large state.

[0024] When the winding sleeve 6 is squeezed or vibrated, multiple springs 8 can extend, retract or bend, and the traction line 13 can bend along with the springs 8. Since the traction line 13 is made of soft material, it can still bend after twisting, so that the bending of the springs 8 is not affected while adjusting the elasticity of the springs 8.

[0025] The take-up sleeve 6 is provided with a butt latch 14 and a lap groove 15 at both ends along the axial direction of the cable body 1. The butt latch 14 on one take-up sleeve 6 is connected to the lap groove 15 on another take-up sleeve 6 to connect the two take-up sleeves 6. Depending on the actual environment, multiple take-up sleeves 6 and locking rings 4 can be set on the cable body 1. The take-up sleeves 6 are connected to each other to form a complete sheath to protect the cable body 1.

[0026] In this embodiment, the locking ring 4 is fitted onto the insulation layer 2 after the slot 9 on the locking ring 4 is connected to the limiting strip 3. The locking ring 4 is called a ring shape by the connection of the first docking component 5. The winding sleeve 6 is formed into a cylindrical shape by the connection of the second docking component 7, forming a sheath that wraps around the outside of the cable body 1. The multiple traction lines 13 can be twisted by rotating the ratchet device. After the traction lines 13 are twisted, the distance between the first receiving seat 10 and the second receiving seat 11 can be shortened, thereby compressing the spring 8 and increasing the elastic force of the spring 8 itself. When the winding sleeve 6 is squeezed, the spring 8 can support the winding sleeve 6 and ensure that the cable body 1 is not squeezed by the winding sleeve 6. When the winding sleeve 6 is vibrated, the spring 8 can reduce the vibration transmitted to the cable body 1 through its own extension and shaking, thereby protecting the cable body 1.

[0027] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A compression-resistant and shock-absorbing cross-linked polyethylene insulated cable, comprising a cable body (1), wherein an insulation layer (2) is disposed on the cable body (1), characterized in that, Also includes: Multiple limiting strips (3) are circumferentially fixedly connected to the insulating layer (2); The locking ring (4) is detachably sleeved on the outside of the insulating layer (2), and the locking ring (4) is detachably connected to the limiting strip (3); A take-up sleeve (6) is sleeved on the outside of the locking ring (4). There is a gap between the take-up sleeve (6) and the insulating layer (2). The take-up sleeve (6) and the locking ring (4) are connected by multiple elastic connection mechanisms. The side of the take-up sleeve (6) away from the locking ring (4) is in contact with the external environment. When the winding sleeve (6) is subjected to external compression and vibration, the winding sleeve (6) can protect the cable body (1) and the elastic connection mechanism can reduce the shock of the cable body (1). The elastic connection mechanism includes a spring (8) and a tightening and shrinking assembly. The distance between the winding sleeve (6) and the locking ring (4) can be adjusted by the tightening and shrinking assembly, thereby adjusting the length and elastic force of the spring (8).

2. The compression-resistant and shock-absorbing cross-linked polyethylene insulated cable according to claim 1, characterized in that, The locking ring (4) has multiple slots (9) on one side near the insulation layer (2). When the locking ring (4) is fitted onto the cable body (1), the limiting strip (3) is in contact with the slots (9).

3. The compression-resistant and shock-absorbing cross-linked polyethylene insulated cable according to claim 1, characterized in that, The elastic connection mechanism further includes: A receiving seat (10) is provided on the locking ring (4), and the spring (8) and the tightening and shrinking assembly are fixedly connected to the receiving seat (10); The receiving seat 2 (11) is set on the winding sleeve (6), the spring (8) is fixedly connected to the receiving seat 2 (11), and the tightening shrink assembly is rotatably connected to the receiving seat 2 (11); The spring (8) is wound around the tightening and retracting assembly.

4. The compression-resistant and shock-absorbing cross-linked polyethylene insulated cable according to claim 3, characterized in that, The tightening and shrinking assembly includes: A torsion limiting component (12) is provided on the second receiving seat (11); Multiple traction lines (13) are connected at both ends to the receiving seat (10) and the torsion limiting component (12), respectively. When the torsion limiting component (12) is rotated, the multiple traction lines (13) can rotate with the torsion limiting component (12).

5. A compression-resistant and shock-absorbing cross-linked polyethylene insulated cable according to claim 4, characterized in that, The multiple traction lines (13) are arranged in parallel. When the torsion limiting component (12) drives the traction lines (13) to rotate, the multiple traction lines (13) twist and twist together.

6. The compression-resistant and shock-absorbing cross-linked polyethylene insulated cable according to claim 5, characterized in that, When multiple traction lines (13) are twisted together, they can pull the first support seat (10) and the second support seat (11) closer to each other. At this time, the spring (8) is compressed and the elastic force increases.

7. A compression-resistant and shock-absorbing cross-linked polyethylene insulated cable according to claim 6, characterized in that, When the winding sleeve (6) is squeezed or vibrated, the multiple springs (8) can extend or bend, and the traction line (13) can bend along with the springs (8).

8. A compression-resistant and shock-absorbing cross-linked polyethylene insulated cable according to claim 1, characterized in that, The take-up sleeve (6) is provided with a butt buckle (14) and a lap groove (15) at both ends along the axial direction of the cable body (1). The butt buckle (14) on one take-up sleeve (6) is connected to the lap groove (15) on the other take-up sleeve (6) so that the two take-up sleeves (6) can be connected.

Images