Enhanced impact-resistant cross-linked polyethylene insulated cable

Abstract

The invention relates to the technical field of cross-linked polyethylene insulated cables, and provides an enhanced impact-resistant cross-linked polyethylene insulated cable, which comprises a conductor, an inner shielding layer, a cross-linked polyethylene insulating layer, an outer shielding layer, an armor layer, an outer sheath, a damping ring, an annular protective cover, a damping fin and a buffer piece, the damping rings are detachably arranged outside the outer sheath, the annular protective covers are of a spliced structure, the annular protective covers and the damping rings are in one-to-one correspondence, the annular protective covers are arranged outside the damping rings, and two damping fins are fixedly connected to the inner side walls of the annular protective covers. The two damping fins are located on the two sides of the damping ring and make contact with the damping ring to absorb and dissipate impact borne by the annular protective cover, and the buffering piece is installed between the annular protective cover and the outer sheath and used for buffering the impact borne by the annular protective cover. According to the technical scheme, the problem that in the prior art, a crosslinked polyethylene insulated cable is prone to damage and fracture when being impacted is solved.

Description

Technical Field

[0001] This invention relates to the field of cross-linked polyethylene insulated cable technology, and more specifically, to an enhanced impact-resistant cross-linked polyethylene insulated cable. Background Technology

[0002] Cross-linked polyethylene (XLPE) insulated cables undergo a chemical or physical process to transform the linear molecular structure of polyethylene into a three-dimensional network, significantly improving its heat resistance, mechanical strength, and dimensional stability. This prevents it from melting when heated and maintains excellent electrical properties. These cables are widely used in industries with extremely high reliability requirements, such as industrial manufacturing, rail transportation, mining, marine engineering, and military facilities.

[0003] In the aforementioned complex and harsh operating environments, cables are often exposed to sudden mechanical impact loads, such as equipment collisions, falling objects, and installation dragging. Although traditional XLPE cables themselves have a certain mechanical strength, their insulation layer and outer sheath still have relatively limited impact resistance. Especially under frequent or high-intensity impacts, they are prone to insulation damage, sheath rupture, and even conductor breakage, which can affect the continuity of power supply and may lead to safety accidents. At present, most cables in the industry still mainly rely on the resistance of the material itself and lack additional, detachable impact protection structures, resulting in significant shortcomings in their impact protection. Summary of the Invention

[0004] This invention proposes an enhanced impact-resistant cross-linked polyethylene insulated cable to solve the problem that cross-linked polyethylene insulated cables are easily damaged and broken when subjected to impact in the prior art.

[0005] The technical solution of the present invention is as follows: A reinforced, impact-resistant cross-linked polyethylene insulated cable, comprising a conductor and, sequentially wrapped around the conductor, an inner shielding layer, a cross-linked polyethylene insulation layer, an outer shielding layer, an armor layer, and an outer sheath, further comprising: Damping rings, wherein multiple damping rings are provided, and the damping rings are detachably disposed on the outside of the outer sheath; A ring-shaped protective cover, wherein the ring-shaped protective cover is a spliced ​​structure, and the ring-shaped protective cover and the damping ring correspond one-to-one, and the ring-shaped protective cover is disposed outside the damping ring; Two damping plates are fixedly connected to the inner wall of the annular protective cover. The two damping plates are located on both sides of the damping ring and in contact with the damping ring to absorb and dissipate the impact on the annular protective cover. A buffer element, installed between the annular protective cover and the outer sheath, is used to buffer the impact received by the annular protective cover. The buffer element includes: A buffer spring is disposed between the annular protective cover and the outer sheath; An arc-shaped support plate is fixedly installed at one end of the buffer spring near the outer sheath.

[0006] To enable the detachable design of the damping ring, the damping ring includes two damping half-rings. One end of each damping half-ring is fixedly connected to a plate, and the other end of each damping half-ring has a slot that matches the plate. The plate is detachably mounted inside the slot via connecting bolts.

[0007] Preferably, the annular protective cover includes two semi-cylindrical protective covers, which are detachably connected by a connector, the connector comprising: Two connecting rings are provided. The connecting rings are located inside the two semi-cylindrical protective covers and are in contact with the inner wall of the semi-cylindrical protective covers. The end of the buffer spring away from the outer sheath is fixedly installed on the connecting ring. The device includes a locking block, which is fixedly connected to a baffle via an elastic plate. Both the semi-cylindrical protective cover and the connecting ring have connection ports for the locking block and the baffle to pass through. When the locking block passes through the connection port, it can be locked at the connection port position under the rebound action of the elastic plate. The semi-cylindrical protective cover has a mounting groove that matches the baffle. The baffle, the semi-cylindrical protective cover, and the connecting ring all have disassembly ports for pressing the locking block.

[0008] To reduce scratches on the outer sheath from the curved support plate, multiple ball bearings are rotatably mounted on the curved support plate, and the ball bearings are in contact with the outer sheath.

[0009] To provide more comprehensive protection for the cable, a telescopic protective cover is fixedly connected to the end of the semi-cylindrical protective cover. The telescopic protective cover contacts the end of two adjacent annular protective covers that are close to each other, so as to cover and protect the gap between the two annular protective covers.

[0010] The working principle and beneficial effects of this invention are as follows: 1. In this invention, an annular protective cover provides an additional layer of protection on the outside of the cable. When equipment or other foreign objects collide with the annular protective cover first, the annular protective cover moves after being impacted. The impact energy is absorbed and released by the friction between the damping ring and the damping plate, converting the impact energy into frictional force, thereby reducing the impact on the cable itself. At the same time, the impact of the annular protective cover on the cable is reduced by the buffer spring, further providing buffer protection and reducing damage to the cable.

[0011] 2. In this invention, the annular protective cover can move and rotate, reducing rigid contact between the annular protective cover and external objects. After being impacted, it can dissipate force through movement and rotation, thereby reducing damage to the annular protective cover. The elasticity of the buffer spring allows the annular protective cover to return to its original position after being impacted, maintaining the best protection for the cable.

[0012] 3. In this invention, a complete protection system is formed by the annular protective cover and the telescopic protective cover to provide overall protection for the cable. The telescopic protective cover allows the cable to bend more freely, enabling the cable to be laid normally. The connecting ring further improves the impact resistance of the annular protective cover, thereby providing better protection for the cable.

[0013] 4. In this invention, the annular protective cover and the connecting ring are connected by a locking block. Pushing the locking block can release the limiting effect of the connecting ring on the annular protective cover, thereby making it easier to disassemble and replace the damaged annular protective cover, saving replacement time and cost. 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 side view of the planar structure of the present invention; Figure 3 This is a schematic diagram of the structure of the damping ring, annular protective cover, damping plate and buffer component of the present invention; Figure 4 This is a schematic diagram of the damping ring, damping plate, annular protective cover, and telescopic protective cover of the present invention. Figure 5 This is a schematic diagram of the damping ring structure of the present invention; Figure 6 This is a schematic diagram of the structure of the damping sheet, telescopic protective cover, annular protective cover and buffer component of the present invention; Figure 7 This is an exploded structural diagram of the telescopic protective cover, the annular protective cover, and the buffer component of the present invention; Figure 8 This is a schematic diagram of the connecting ring and buffer component of the present invention.

[0016] In the picture: 1. Conductor; 2. Inner shielding layer; 3. Cross-linked polyethylene insulation layer; 4. Outer shielding layer; 5. Armoring layer; 6. Outer sheath; 7. Damping sheet; 8. Telescopic protective cover; 101. Damping semi-ring; 102. Insert plate; 201. Semi-cylindrical protective cover; 301. Connecting ring; 302. Locking block; 303. Elastic plate; 304. Baffle; 401. Buffer spring; 402. Arc-shaped support plate; 403. Ball bearing. 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] like Figures 1 to 8 As shown, this embodiment proposes an enhanced impact-resistant cross-linked polyethylene insulated cable, including a conductor 1 and an inner shielding layer 2, a cross-linked polyethylene insulation layer 3, an outer shielding layer 4, an armor layer 5, and an outer sheath 6 sequentially wrapped around the conductor 1. The inner shielding layer 2 is an extruded semiconductor 1 layer, which is uniformly coated on the conductor 1 by extruded cross-linked ultra-smooth semiconductor 1 material. The outer shielding layer 4 is also an extruded semiconductor 1 layer. It is required that the insulation shielding and the cross-linked polyethylene insulation layer 3 are extruded simultaneously. The armor layer 5 is the outer protective layer of the cable, which is usually made of metal materials (such as steel strip or steel wire) and is mainly used to protect the cable from mechanical damage and corrosion. It also includes a damping ring, an annular protective cover, a damping plate 7, and a buffer.

[0019] like Figures 1 to 5 As shown, multiple damping rings are provided. The damping rings are detachably installed outside the outer sheath 6. The damping ring includes two damping half-rings 101. One end of the damping half-ring 101 is fixedly connected to a plate 102. The other end of the damping half-ring 101 has a slot that matches the plate 102. The plate 102 is detachably installed inside the slot by connecting bolts. The damping half-ring 101 has a threaded hole for the bolt to be screwed in. The plate 102 has a through hole for the bolt to pass through. The plate 102 is inserted into the slot, and the bolt is screwed into the threaded hole and through the through hole to fix the plate 102 inside the slot. The damping ring is installed outside the outer sheath 6. The damping ring and the outer sheath 6 are in close contact and stably installed outside the outer sheath 6. The plate 102 can further improve the stability of the connection between the two damping half-rings 101.

[0020] like Figures 1 to 8As shown, the annular protective cover has a spliced ​​structure, with each annular protective cover corresponding to a damping ring. The annular protective cover is located outside the damping ring. The annular protective cover includes two semi-cylindrical protective covers 201, which are detachably connected by a connector. The connector includes a connecting ring 301 and a locking block 302. There are two connecting rings 301, which are located inside the two semi-cylindrical protective covers 201 and contact the inner wall of the semi-cylindrical protective covers 201. The end of the buffer spring 401 away from the outer sheath 6 is fixedly installed on the connecting ring 301. The locking block 302 is connected by an elastic plate. 303 is fixedly connected to a baffle 304. The semi-cylindrical protective cover 201 and the connecting ring 301 are all provided with connection ports for the locking block 302 and the baffle 304 to pass through. When the locking block 302 passes through the connection port, it can be locked in the connection port position by the rebound action of the elastic plate 303. The baffle 304, the semi-cylindrical protective cover 201, and the connecting ring 301 are all provided with disassembly ports for pressing the locking block 302. The semi-cylindrical protective cover 201 has a mounting groove that matches the baffle 304. The locking block 302 is wedge-shaped. Inserting the locking block 302 into the connection port allows it to be pushed open through the connection port. When the elastic plate 303 bends, and the locking block 302 passes through the connection port, the elastic plate 303 springs back to its original shape, causing the locking block 302 and the end of the connection port to fit tightly against the elastic plate 303, thus limiting its position. The baffle 304 is located inside the mounting groove and its shape matches the outer wall of the annular protective cover, preventing the cable from contacting foreign objects and causing obstruction during cable laying or movement. The annular protective cover and the connecting ring 301 are connected by the baffle 304, the elastic plate 303, and the locking block 302. The connecting ring 301 supports and limits the annular protective cover, while also increasing the strength of the annular protective cover and further reducing... The deformation and damage of the annular protective cover improve the protection effect of the cable. When it is necessary to disassemble the annular protective cover, you can insert your fingers or a stick-shaped object into the disassembly port and push the locking block 302 into the connection port. You can pull the baffle 304 to remove the locking block 302 from the connection port, and disconnect the connection between the semi-cylindrical protective cover 201 and the connecting ring 301. Thus, the semi-cylindrical protective cover 201 can be disassembled and replaced. As a shell that directly bears the impact, the material of the annular protective cover must have high rigidity and toughness (such as engineering plastics, composite materials or lightweight metals).

[0021] like Figures 1 to 7As shown, two damping plates 7 are fixedly connected to the inner wall of the annular protective cover. The two damping plates 7 are located on both sides of the damping ring and are in contact with the damping ring to absorb and dissipate the impact on the annular protective cover. When the annular protective cover is impacted by the outside, the annular protective cover causes the damping plates 7 to slide. There is a certain gap between the inner wall of the annular protective cover and the outer wall of the damping ring. The external impact is absorbed and released by the sliding damping between the damping plates 7 and the damping ring. The impact force is converted into friction force to dissipate energy and reduce the damage of the external impact to the cable. The damping ring and the damping plates 7 are made of high damping coefficient materials (such as rubber or polymer composite materials with added fillers) to enhance energy dissipation.

[0022] like Figures 1 to 8 As shown, a buffer component is installed between the annular protective cover and the outer sheath 6 to buffer the impact received by the annular protective cover. The buffer component includes a buffer spring 401 and an arc-shaped support plate 402. The buffer spring 401 is disposed between the annular protective cover and the outer sheath 6. The arc-shaped support plate 402 is fixedly installed at one end of the buffer spring 401 near the outer sheath 6. To reduce scratches on the outer sheath 6 by the arc-shaped support plate 402, multiple balls 403 are rotatably mounted on the arc-shaped support plate 402. The balls 403 contact the outer sheath 6. When the annular protective cover is subjected to external impact... During impact, the buffer spring 401 can decelerate and buffer the impact. At the same time, the buffer spring 401 supports and limits the annular protective cover, improving its stability. After the annular protective cover is displaced by the impact, it resets the annular protective cover, ensuring that it is in the optimal protective position. The ball bearing 403 reduces the friction of the arc support plate 402 on the outer sheath 6, thereby reducing cable damage. It also allows the annular protective cover to rotate and move, thereby dissipating force and providing better protection.

[0023] like Figures 1 to 7 As shown, to provide more comprehensive protection for the cable, a telescopic protective cover 8 is fixedly connected to the end of the semi-cylindrical protective cover 201. The telescopic protective covers 8 are connected at the ends of two adjacent annular protective covers that are close to each other, so as to cover and protect the gap between the two annular protective covers. The telescopic protective cover 8 has a certain degree of elasticity and can be stretched and bent. The telescopic protective covers 8 at the ends of two adjacent annular protective covers that are close to each other are pressed tightly together under the action of elasticity to adapt to the bending of the cable. The telescopic protective cover 8 supplements the protection of the gap between two adjacent annular protective covers, thereby providing more comprehensive protection for the outside of the cable.

[0024] The working principle or usage process of this reinforced impact-resistant cross-linked polyethylene insulated cable is as follows: Select an appropriate number of damping rings and annular protective covers according to the cable laying length. First, install the damping rings on the outside of the outer sheath 6, insert the insert plate 102 into the slot, and fix the insert plate 102 in the slot with bolts to fix the damping rings on the outside of the outer sheath 6. Then, the annular protective cover is installed on the outside of the damping ring, the damping plate 7 is installed on both sides of the damping ring, the two semi-cylindrical protective covers 201 are pressed tightly together, the connecting ring 301 is installed between the two semi-cylindrical protective covers 201, so that the positions of the connection ports are aligned, the locking block 302 is inserted into the inside of the connection port, and the semi-cylindrical protective cover 201 and the connecting ring 301 are connected by the locking block 302 and the baffle 304, thereby realizing the installation of the annular protective cover; The telescopic protective cover 8 connected to two adjacent annular protective covers fit tightly together to block the gap between the annular protective covers. The annular protective covers and the telescopic protective cover 8 protect the outside of the cable. When the annular protective cover is subjected to external impact, the buffer spring 401 decelerates and buffers the impact. At the same time, the sliding damping generated by the damping plate 7 and the damping ring dissipates the impact energy to resist the impact and avoid damage to the cable caused by the external impact. After the impact ends, the buffer spring 401 drives the annular protective cover to reset. When a ring-shaped protective cover or telescopic protective cover 8 is damaged, insert a rod-shaped object into the disassembly port and move the locking block 302 towards the connection port to move it into the range of the connection port. The locking block 302 can be pulled out from the inside of the connection port through the baffle 304 to release the connection between the semi-cylindrical protective cover 201 and the connecting ring 301, disassemble the semi-cylindrical protective cover 201, and install the new ring-shaped protective cover in the disassembly position and fix it by the locking block 302 and the baffle 304. When an impact occurs, the annular protective cover first bears the external force. Through the buffering effect of the buffer spring 401, combined with the friction energy dissipation of the damping ring and damping plate 7, the impact intensity is significantly weakened. Even if the annular protective cover is damaged in a localized manner under extreme impact, it can be replaced separately through the connector that allows for quick disassembly and assembly, without the need to replace the entire cable, thus greatly saving maintenance costs and time.

[0025] 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 reinforced, impact-resistant cross-linked polyethylene insulated cable, comprising a conductor (1) and, sequentially wrapped around the conductor (1), an inner shielding layer (2), a cross-linked polyethylene insulation layer (3), an outer shielding layer (4), an armor layer (5), and an outer sheath (6), characterized in that, Also includes: Damping rings, wherein multiple damping rings are provided, and the damping rings are detachably disposed outside the outer sheath (6); A ring-shaped protective cover, wherein the ring-shaped protective cover is a spliced ​​structure, and the ring-shaped protective cover and the damping ring correspond one-to-one, and the ring-shaped protective cover is disposed outside the damping ring; Damping plates (7): Two damping plates (7) are fixedly connected to the inner side wall of the annular protective cover. The two damping plates (7) are located on both sides of the damping ring and in contact with the damping ring to absorb and dissipate the impact on the annular protective cover. A buffer is installed between the annular protective cover and the outer sheath (6) to buffer the impact on the annular protective cover.

2. The reinforced impact-resistant cross-linked polyethylene insulated cable according to claim 1, characterized in that, The buffer includes: A buffer spring (401) is disposed between the annular protective cover and the outer sheath (6); An arc-shaped support plate (402) is fixedly installed on one end of the buffer spring (401) near the outer sheath (6).

3. The reinforced impact-resistant cross-linked polyethylene insulated cable according to claim 2, characterized in that, Multiple balls (403) are rotatably mounted on the arc-shaped support plate (402), and the balls (403) are in contact with the outer sheath (6).

4. The reinforced impact-resistant cross-linked polyethylene insulated cable according to claim 1, characterized in that, The damping ring includes two damping half-rings (101). One end of the damping half-ring (101) is fixedly connected to a plug plate (102), and the other end of the damping half-ring (101) is provided with a slot that matches the plug plate (102). The plug plate (102) is detachably installed inside the slot by connecting bolts.

5. The reinforced impact-resistant cross-linked polyethylene insulated cable according to claim 2, characterized in that, The annular protective cover includes two semi-cylindrical protective covers (201), which are detachably connected by a connector.

6. The reinforced impact-resistant cross-linked polyethylene insulated cable according to claim 5, characterized in that, The connector includes: Connecting ring (301), two connecting rings (301) are provided, the connecting ring (301) is located inside the two semi-cylindrical protective covers (201) and contacts the inner wall of the semi-cylindrical protective cover (201), and the end of the buffer spring (401) away from the outer sheath (6) is fixedly installed on the connecting ring (301); The locking block (302) is fixedly connected to the baffle (304) via the elastic plate (303). The semi-cylindrical protective cover (201) and the connecting ring (301) are both provided with connection ports for the locking block (302) and the baffle (304) to pass through. When the locking block (302) passes through the connection port, it can be locked at the connection port position under the rebound action of the elastic plate (303). The baffle (304), the semi-cylindrical protective cover (201) and the connecting ring (301) are all provided with disassembly ports for pressing the locking block (302).

7. The reinforced impact-resistant cross-linked polyethylene insulated cable according to claim 6, characterized in that, The semi-cylindrical protective cover (201) has a mounting groove that matches the baffle (304).

8. The reinforced impact-resistant cross-linked polyethylene insulated cable according to claim 5, characterized in that, The end of the semi-cylindrical protective cover (201) is fixedly connected to a telescopic protective cover (8). The telescopic protective cover (8) is connected to the end of two adjacent annular protective covers that are close to each other, so as to block and protect the gap between the two annular protective covers.

Images