Power cable capable of preventing tension crack

Abstract

The utility model belongs to the technical field of power cables, and particularly relates to an anti-tension-crack power cable, which comprises an insulation protection layer and a wire core in the insulation protection layer, two ends of the insulation protection layer are provided with fixing blocks, the inner side wall of each fixing block is provided with rubber, the surface of each fixing block is in threaded connection with a bolt in a penetrating manner, and the surface of each fixing block is provided with a groove. The surface of the insulation protection layer is sleeved with a supporting block, the outer wall of one side of the supporting block is connected with a first reflector, the outer wall of the other side of the supporting block is connected with a second reflector, and the bottom end of the supporting block is in threaded connection with an extrusion pin. According to the utility model, the end part of the power cable between the two support frames is firmly installed on the support frames by utilizing the close fit of the fixing blocks and the bolts. Then, the screws are connected with the supporting blocks, and the same pulling force is generated. When the power cable is pulled, the pulling force of the power cable can be effectively shared, so that the risk that the cable is damaged due to the pulling force effect is remarkably reduced.

Description

Technical Field

[0001] This utility model belongs to the field of power cable technology, specifically relating to a power cable that is resistant to tearing. Background Technology

[0002] Power cables are mainly used to transmit high-voltage, medium-voltage, or low-voltage electrical energy to various types of equipment, such as buildings, factories, communication systems, and power transmission systems. They are widely used in urban underground power grids, power plant lead-out lines, internal power supply for industrial and mining enterprises, and underwater power transmission lines across rivers and seas.

[0003] During the installation of power cables, when overhead power cables are connected and secured to support frames, the weight of the cables themselves generates a downward tension, especially between two support frames. If this tension is not properly managed, it may cause damage or cracking of the outer abrasion-resistant protective layer of the power cable. Utility Model Content

[0004] The purpose of this invention is to provide a tear-resistant power cable, addressing the problem in existing power cable installation processes where, when overhead power cables are connected and fixed to support frames, their own weight generates downward tension, especially between two support frames. If this tension is not properly addressed, it can lead to damage or cracking of the cable's outer abrasion-resistant protective layer.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tear-resistant power cable, comprising an insulating protective layer and a wire core inside the insulating protective layer, with fixing blocks at both ends of the insulating protective layer, rubber installed on the inner sidewall of the fixing block, and bolts threaded through the surface of the fixing block, a support block sleeved on the surface of the insulating protective layer, a first reflector connected to one outer wall of the support block, a second reflector connected to the other outer wall of the support block, a compression pin threaded to the bottom end of the support block, and a mounting plate welded to the top end of the fixing block, with a groove formed on the surface of the mounting plate, and screws connected inside the groove on the surface of the mounting plate.

[0006] In a preferred embodiment of the present invention, the inner wall of the rubber is fixedly connected to the wear-resistant layer of the insulation protective layer, and the outer wall of the rubber is fixedly connected to the inner wall of the fixing block.

[0007] As a preferred embodiment of the present invention, the bolts are connected in a circular array on the surface of the fixing block.

[0008] As a preferred embodiment of the tear-resistant power cable of this utility model, the rubber is made of nitrile rubber.

[0009] In a preferred embodiment of the present invention, the inner diameter of the support block is larger than the diameter of the insulating protective layer.

[0010] As a preferred embodiment of the present invention for a tear-resistant power cable, the support block is connected to the insulation protective layer by a detachable compression fixation connection through a compression pin.

[0011] As a preferred embodiment of the tear-resistant power cable of this utility model, the first reflector and the second reflector are made of stainless steel.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] This invention utilizes the tight fit between the fixing block and the bolt to securely install the end of the power cable between the two support frames. Subsequently, the connection between the screw and the support block also generates tension. When the power cable is under tension, the tension is effectively distributed, significantly reducing the risk of cable damage due to tension. Furthermore, the added support block further enhances the dispersion of cable tension, providing additional protection and effectively preventing cable cracking caused by excessive tension. In addition, the combination of the first and second reflectors produces a strong reflective effect under light, effectively deterring birds that might attempt to perch on the power cable, thereby reducing safety hazards caused by birds perching or nesting and ensuring the safe operation of the power cable. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0016] Figure 2 This is a schematic diagram of the main body structure of this utility model from a bottom view;

[0017] Figure 3 This is a schematic diagram of the connection structure between the fixing block and the rubber of this utility model;

[0018] Figure 4 This is a schematic diagram of the connection structure between the support block and the first and second reflectors of this utility model.

[0019] In the diagram: 1. Insulation protective layer; 2. Wire core; 3. Fixing block; 4. Bolt; 5. Rubber; 6. Support block; 7. First reflector; 8. Second reflector; 9. Extrusion pin; 10. Mounting plate; 11. Screw. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-4 The present invention provides the following technical solution: a power cable that is resistant to tearing, comprising an insulating protective layer 1 and a wire core 2 inside the insulating protective layer 1, fixing blocks 3 are provided at both ends of the insulating protective layer 1, rubber 5 is installed on the inner side wall of the fixing block 3, bolts 4 are threaded through the surface of the fixing block 3, a support block 6 is sleeved on the surface of the insulating protective layer 1, a first reflector 7 is connected to one side of the outer wall of the support block 6, a second reflector 8 is connected to the other side of the outer wall of the support block 6, a compression pin 9 is threaded at the bottom end of the support block 6, and a mounting plate 10 is welded to the top of the fixing block 3. A groove is opened on the surface of the mounting plate 10, and a screw 11 is connected inside the groove on the surface of the mounting plate 10.

[0022] In a preferred embodiment: the inner wall of the rubber 5 is fixedly connected to the wear-resistant layer of the insulating protective layer 1, and the outer wall of the rubber 5 is fixedly connected to the inner wall of the fixing block 3.

[0023] In a preferred embodiment, the bolts 4 are connected to the surface of the fixing block 3 in a circular array.

[0024] In the preferred embodiment, rubber 5 is made of nitrile rubber.

[0025] In a preferred embodiment, the inner diameter of the support block 6 is larger than the diameter of the insulating protective layer 1.

[0026] In a preferred embodiment: the support block 6 is detachably and compressibly fixedly connected to the insulating protective layer 1 by means of the extrusion pin 9.

[0027] In a preferred embodiment, the first reflector 7 and the second reflector 8 are made of stainless steel.

[0028] The working principle is explained as follows: During the overhead installation of the insulation protective layer 1 via the support frame, firstly, the support block 6 is manually removed and fitted onto the surface of the power cable, and moved to the middle position of the cable between the two support frames. Then, the pressing pin 9 is manually rotated to firmly fix the support block 6 onto the cable. Simultaneously, the first reflector 7 and the second reflector 8 are also installed and fixed via the support block 6. Next, the screw 11 is manually inserted along the groove and then screwed into the support block 6, thereby creating tension on the power cable. Immediately afterwards, the bolt 4 is manually removed, and the fixing block 3 is firmly installed on the support frame. Subsequently, the power cable between the two support frames is stabilized by the tightening action of the fixing block 3 and the bolt 4.

[0029] When the power cable is subjected to tension, this tension is effectively distributed by the tightening force generated by the bolts 4 between the fixing block 3 and the support frame. Subsequently, the connection between the screw 11 and the support block 6 also generates tension. This significantly reduces the risk of cable damage due to tension. In addition, the added support block 6 not only further enhances the distribution effect of cable tension but also provides an extra protective layer for the cable, effectively preventing cracking caused by excessive tension.

[0030] In addition, the combined design of the first reflector 7 and the second reflector 8 can produce a strong reflective effect under light. This feature can effectively deter birds that may try to land on the power cable, thereby reducing the safety hazards caused by birds landing or nesting, and ensuring the safe and stable operation of the power cable.

[0031] It is worth noting that after the insulation layer 1 is installed, the cable will experience thermal expansion and contraction due to changes in ambient temperature. Fixing blocks 3 are installed at both ends of the insulation layer 1, working in conjunction with bolts 4 to fix the cable between the two support frames, forming one section of the overall power cable, not both ends. At this point, rubber 5 connects the gap between the fixing blocks 3 and the insulation layer 1. Rubber 5 possesses properties such as high temperature resistance, high elasticity, good flexibility, suitable hardness, and excellent aging resistance, effectively buffering the displacement caused by the cable's thermal expansion and contraction, preventing direct friction between the cable body and the fixing blocks 3, and preventing damage to the cable's wear-resistant layer due to long-term friction, thereby extending the service life of the power cable and ensuring the stability and safety of power transmission. Simultaneously, the elastic force of rubber 5 will not affect the normal installation of the power cable.

[0032] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A power cable resistant to cable tear, comprising an insulating protective layer (1) and a core (2) inside the insulating protective layer (1), characterized in that: The insulating protective layer (1) is provided with fixing blocks (3) at both ends, and rubber (5) is installed on the inner side wall of the fixing block (3). Bolts (4) are threaded through the surface of the fixing block (3). The surface of the insulating protective layer (1) is fitted with a support block (6). A first reflector (7) is connected to one side of the outer wall of the support block (6), and a second reflector (8) is connected to the other side of the outer wall of the support block (6). A pressing pin (9) is threaded to the bottom end of the support block (6). A mounting plate (10) is welded to the top of the fixing block (3). A groove is opened on the surface of the mounting plate (10), and a screw (11) is connected inside the groove on the surface of the mounting plate (10).

2. An anti-tearable power cable according to claim 1, characterized in that: The inner wall of the rubber (5) is fixedly connected to the wear-resistant layer of the insulating protective layer (1), and the outer wall of the rubber (5) is fixedly connected to the inner wall of the fixing block (3).

3. An anti-tearable power cable according to claim 1, characterized in that: The bolts (4) are connected in a circular array to the surface of the fixing block (3).

4. An anti-tearable power cable according to claim 1, characterized in that: The rubber (5) is made of nitrile rubber.

5. An anti-tearable power cable according to claim 1, characterized in that: The inner diameter of the support block (6) is larger than the diameter of the insulating protective layer (1).

6. An anti-tearable power cable according to claim 1, characterized in that: The support block (6) is connected to the insulating protective layer (1) by a compression pin (9) in a detachable compression fixed connection.

7. An anti-tearable power cable according to claim 1, characterized in that: The first reflector (7) and the second reflector (8) are made of stainless steel.

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