Steel-cored reinforced low wind pressure overhead insulated cable

Abstract

This utility model belongs to the field of cable technology and discloses a steel-core reinforced low wind pressure overhead insulated cable, including an insulation layer, a cable body disposed inside the insulation layer, and butt sleeves disposed at both ends of the insulation layer. Each butt sleeve has a connecting mechanism inside, which is used to connect the cable. The cable body includes a shielding layer, the outer wall of which is fixedly connected to the inner wall of the insulation layer. Multiple aluminum wire conductors are connected to the inner wall of the shielding layer, and the outer walls of the multiple aluminum wire conductors are connected to the same insulating layer on adjacent sides. This overhead insulated cable separates the steel wire core from the aluminum wire conductors through the insulating layer, avoiding electrochemical corrosion caused by contact between different materials. The steel wire core enables the cable to withstand its own weight and external loads, and the tensile strength of the ribs enhances the mechanical strength of the cable.

Description

Technical Field

[0001] This utility model belongs to the field of cable technology, and in particular relates to a steel-core reinforced low wind pressure overhead insulated cable. Background Technology

[0002] Traditional high-voltage power transmission methods mostly use high-voltage overhead lines or high-voltage cable lines as transmission channels. As power grid construction continues to expand into areas with complex terrain and climate conditions, the natural environmental challenges faced by power lines are increasing. Among these, strong winds have a particularly significant impact on power lines. Although existing power lines are designed with a certain level of wind pressure resistance in mind, many problems still exist in strong wind environments. For example, the shape and structure of ordinary power lines are prone to generating significant wind resistance under strong winds, leading to excessive wind pressure and phenomena such as conductor galloping and increased swaying. This can not only cause the conductors to collide with surrounding objects, resulting in safety hazards such as insulation damage, but also loosen conductor connections due to excessive swaying, affecting the stability of power transmission and even causing power outages. Furthermore, excessive wind pressure can also exert additional pressure on supporting structures such as towers, increasing the risk of tower collapse and threatening the safe operation of the entire transmission line.

[0003] Traditional copper cables suffer from insufficient mechanical strength. During long-distance installations or in severe weather, they are prone to tensile deformation, excessive sag, and even breakage due to excessive stress, severely impacting the safe and stable operation of transmission lines. To address this issue, a common practice is to incorporate a steel core within the cable. The high strength of the steel core enhances the cable's tensile and bending resistance. However, in practical applications, because the steel core and conductor are different metals, moisture, dust, and corrosive gases in the air can form an electrolyte at the interface, causing a reaction between the steel core and conductor. This leads to a decrease in steel core strength and damage to the conductor's conductivity, increasing line maintenance costs and safety hazards. Furthermore, cable connection mechanisms are required during cable laying or breakage repairs, and sealing at the connection points is a critical concern. Therefore, a steel-core reinforced low-wind-pressure overhead insulated cable is proposed to address these problems. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a steel-core reinforced low wind pressure overhead insulated cable, which aims to improve the problem in the prior art where the steel core and conductor react, resulting in a decrease in the strength of the steel core and damage to the conductivity of the conductor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A steel-core reinforced low wind pressure overhead insulated cable includes an insulation layer, a cable body is disposed inside the insulation layer, and butt sleeves are disposed at both ends of the insulation layer. A connecting mechanism is disposed inside each of the two butt sleeves, and both connecting mechanisms are used to connect the cable.

[0007] The cable body includes a shielding layer, the outer wall of which is connected to the inner wall of the insulation layer. Multiple aluminum wire conductors are connected to the inner wall of the shielding layer. The outer walls of the multiple aluminum wire conductors are connected to the same isolation layer on adjacent sides. Multiple steel wire cores are connected to the inner wall of the isolation layer. Grooves are uniformly arranged on the surface of the insulation layer. Reinforcing components are provided on the outside of the insulation layer.

[0008] As a further description of the above technical solution:

[0009] The reinforcing component includes multiple ribs, the outer walls of which are fixedly connected to the inner wall of the insulating layer, and multiple guide grooves are formed in the groove.

[0010] As a further description of the above technical solution:

[0011] The outer walls of both connecting sleeves are provided with multiple drainage grooves, and the outer walls of both connecting sleeves are connected with lifting lugs.

[0012] As a further description of the above technical solution:

[0013] The connecting mechanism includes a conductor crimping block, the outer wall of which is fixedly connected to the outer wall of the aluminum wire conductor on one side. A connecting protrusion is connected to the top of the top conductor crimping block, and a connecting groove is provided at the bottom of the bottom conductor crimping block. A filling component is provided inside the conductor crimping block. A flange is connected to the outer wall of the mating sleeve. A positioning component is provided on the opposite side of the flange. An installation component is provided on the opposite side of the flange. A sealing component is provided on the opposite side of the flange.

[0014] As a further description of the above technical solution:

[0015] The filling component includes a water-blocking filling block, the outer wall of which is fixedly connected to the inner wall of the conductor crimping block, and an insulating filling block is connected to the outer wall of the conductor crimping block.

[0016] As a further description of the above technical solution:

[0017] The positioning component includes multiple positioning blocks, the tops of which are fixedly connected to the bottom of the bottom flange, and the outer wall of the top flange is provided with multiple positioning grooves.

[0018] As a further description of the above technical solution:

[0019] The mounting assembly includes multiple bolts, the outer walls of which are threaded to the inner wall of the bottom flange, and the outer walls of both flanges are provided with multiple threaded holes.

[0020] As a further description of the above technical solution:

[0021] The sealing assembly includes a waterproof sealing strip, the top of which is fixedly connected to the bottom of the bottom flange, and a sealing groove is provided on the top of the top flange.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the steel wire core is separated from multiple aluminum wire conductors by an isolation layer, which avoids electrochemical corrosion caused by contact between different materials and ensures the conductive environment of the aluminum wire conductors. The multiple steel wire cores form a core support skeleton, enabling the cable to withstand its own weight and external loads. The tensile strength of the multiple ribs fixed on the inner wall of the insulation layer enhances the mechanical strength of the cable. At the same time, the multiple guide grooves opened on the outer wall of the insulation layer guide the airflow along the spiral path, thereby reducing air resistance, reducing wind pressure load in strong wind environments, and improving the stability of the cable under complex weather conditions.

[0024] 2. The two conductor crimping blocks in the connecting mechanism are fixed to the outer walls of the aluminum wire conductors of the two cable segments and mechanically crimped to form a conductive whole, ensuring the continuity of current transmission. The connecting protrusion of the top conductor crimping block and the connecting groove of the bottom conductor crimping block fit together to achieve positioning and docking of the two cable segments, avoiding misalignment during connection. The water-blocking filler block in the filling component expands when exposed to water to form a seal, preventing moisture from seeping into the conductor connection area. The waterproof sealing strip in the sealing component deforms elastically under the action of bolt tightening force and fills the sealing groove of the top flange to achieve a waterproof sealing effect. Attached Figure Description

[0025] Figure 1 This is a perspective view of the steel-cored reinforced low wind pressure overhead insulated cable of this embodiment;

[0026] Figure 2 This is a partial structural exploded view of the steel-core reinforced low wind pressure overhead insulated cable of this embodiment;

[0027] Figure 3 This is a cross-sectional view of the cable body of the steel-core reinforced low wind pressure overhead insulated cable of this embodiment;

[0028] Figure 4 This is a cross-sectional view of the top connection mechanism of the steel-core reinforced low wind pressure overhead insulated cable in this embodiment;

[0029] Figure 5This is a cross-sectional view of the bottom connection mechanism of the steel-core reinforced low wind pressure overhead insulated cable in this embodiment.

[0030] Legend:

[0031] 1. Insulation layer; 2. Cable body; 201. Shielding layer; 202. Aluminum wire conductor; 203. Insulation layer; 204. Steel wire core; 205. Reinforcing assembly; 2051. Rib core; 2052. Drainage groove; 3. Butt sleeve; 4. Connection mechanism; 401. Conductor crimping block; 402. Connecting protrusion; 403. Connecting groove; 404. Filling assembly; 4041. Water-blocking filler block; 4042. Insulating filler block; 405. Flange; 406. Positioning assembly; 4061. Positioning block; 4062. Positioning groove; 407. Mounting assembly; 4071. Bolt; 4072. Screw hole; 408. Sealing assembly; 4081. Waterproof sealing strip; 4082. Sealing groove; 5. Drainage groove; 6. Lifting lug. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] See attached document Figure 1 Appendix Figure 2 and attached Figure 3 An embodiment of this utility model is provided: a steel-core reinforced low wind pressure overhead insulated cable, including an insulation layer 1, which serves as an electrical insulation layer and prevents current leakage. The cable body 2 is provided inside the insulation layer 1. The two ends of the insulation layer 1 are provided with connecting sleeves 3, which provide positioning and support for cable connection. Both connecting sleeves 3 are provided with connecting mechanisms 4 inside, which are used to connect cables.

[0034] The cable body 2 includes a shielding layer 201. The outer wall of the shielding layer 201 is fixedly connected to the inner wall of the insulation layer 1. The shielding layer 201 can distribute the electric field evenly and avoid local electric field concentration. Multiple aluminum wire conductors 202 are connected to the inner wall of the shielding layer 201. The multiple aluminum wire conductors 202 serve as conductive carriers and are responsible for transmitting current. The same isolation layer 203 is connected to the adjacent side of the outer wall of the multiple aluminum wire conductors 202. The isolation layer 203 separates the aluminum wire conductors 202 from the steel wire cores 204 to prevent electrochemical corrosion. Multiple steel wire cores 204 are connected to the inner wall of the isolation layer 203. The multiple steel wire cores 204 provide core tensile strength and bear the cable load.

[0035] The surface of the insulation layer 1 is uniformly provided with grooves, and the outside of the insulation layer 1 is provided with a reinforcing component 205, which is used to enhance the structural strength of the cable and reduce wind pressure.

[0036] Specifically, the reinforcing component 205 includes multiple ribs 2051, the outer walls of which are fixedly connected to the inner wall of the insulation layer 1. The multiple ribs 2051 enhance the cable's resistance to compression. The grooves of the insulation layer 1 are provided with guide grooves 2052, which guide airflow, reduce wind resistance, and lower wind pressure.

[0037] Specifically, during power transmission, multiple steel wire cores 204 form a supporting skeleton to bear the cable's own weight and external loads. The outer isolation layer 203 of the steel wire cores 204 separates them from multiple aluminum wire conductors 202. The multiple aluminum wire conductors 202 transmit current, and the outer shielding layer 201 has a uniform electric field distribution to prevent uneven surfaces of the aluminum wire conductors 202 from causing local electric field concentration and to protect the outer insulation layer 1. The insulation layer 1 blocks current leakage. Multiple ribs 2051 on the inner wall of the insulation layer 1 enhance the cable's mechanical strength, and multiple guide grooves 2052 on its outer wall guide airflow along a spiral path to reduce air resistance, reduce wind pressure load under strong winds, and improve the cable's stability under complex weather conditions.

[0038] See attached document Figure 1 Appendix Figure 4 and attached Figure 5 Both connecting mechanisms 4 include conductor crimping blocks 401. The outer walls of the two conductor crimping blocks 401 are fixedly connected to the outer walls of the aluminum wire conductor 202 on adjacent sides, forming a whole with the aluminum wire conductor 202 and the conductor crimping blocks 401. The conductor crimping blocks 401 achieve connection and conductivity of the aluminum wire conductor 202. A connecting protrusion 402 is connected to the top of the top conductor crimping block 401 for positioning and docking. A connecting groove 403 is provided at the bottom of the bottom conductor crimping block 401, which engages with the connecting protrusion 402 to achieve docking. The inner... Each part is equipped with a filling component 404, which serves to provide waterproofing and insulation. The outer walls of the two mating sleeves 3 are connected to flanges 405, which provide rigid support for the connection. Positioning components 406 are provided on the opposite sides of the two flanges 405 to ensure accurate mating position of the flanges 405. Mounting components 407 are provided on the opposite sides of the two flanges 405 to fasten the flanges 405. Sealing components 408 are provided on the opposite sides of the two flanges 405 to achieve waterproof sealing of the connection.

[0039] Specifically, the filling component 404 includes a water-blocking filling block 4041, which prevents water from seeping into the conductor connection. The outer wall of the water-blocking filling block 4041 is fixedly connected to the inner wall of the conductor crimping block 401, so that the water-blocking filling block 4041 can function stably. An insulating filling block 4042 is connected to the outer wall of the conductor crimping block 401, which enhances the insulation performance of the connection. The sealing component 408 includes a waterproof sealing strip 4081, which plays a role in sealing and waterproofing. The top of the waterproof sealing strip 4081 is fixedly connected to the bottom of the bottom flange 405, so that the position of the waterproof sealing strip 4081 is fixed. A sealing groove 4082 is opened on the top of the top flange 405, and the sealing groove 4082 cooperates with the waterproof sealing strip 4081 to enhance the sealing performance.

[0040] Specifically, when connecting two cable segments, the mating sleeve 3 provides positioning and support. In the connecting mechanism 4, two conductor crimping blocks 401 are fixed to the outer walls of the aluminum wire conductors 202 of the two cable segments respectively, forming a conductive whole through mechanical crimping. The connecting protrusion 402 of the top conductor crimping block 401 is fitted into the connecting groove 403 of the bottom conductor crimping block 401. In the filling component 404 inside the conductor crimping block 401, the water-blocking filling block 4041 fills its inner wall, and the outer insulating filling block 4042 enhances the insulation. The flange 405 provides rigid support. The positioning component 406 ensures that the flange 405 is accurately mated. The installation component 407 fastens the two flanges 405. In the sealing component 408, the waterproof sealing strip 4081 deforms under the fastening force of the installation component 407, filling the sealing groove 4082 of the top flange 405 to achieve waterproof sealing.

[0041] See attached document Figure 1 Appendix Figure 4 and attached Figure 5 The positioning assembly 406 includes multiple positioning blocks 4061, the tops of which are fixedly connected to the bottom of the bottom flange 405, forming an integral unit between the positioning blocks 4061 and the bottom flange 405. The outer wall of the top flange 405 has multiple positioning grooves 4062, which cooperate with the positioning blocks 4061 to achieve precise alignment. The mounting assembly 407 includes multiple bolts 4071, which are used to fasten the two flanges 405. The outer walls of 71 are threaded to the inner walls of the bottom flange 405, providing connection points for the fastening of the flange 405. The outer walls of both flanges 405 are provided with multiple threaded holes 4072, which provide threaded connection positions for bolts 4071. The outer walls of both connecting sleeves 3 are provided with multiple drainage grooves 5, which are used to drain water accumulated on the connecting sleeves 3. The outer walls of both connecting sleeves 3 are connected with lifting lugs 6, which provide force points for the lifting of the connecting sleeves 3.

[0042] Specifically, when connecting two cable segments, the lifting lugs 6 on the outer wall of the connecting sleeve 3 are used to complete the lifting and positioning. The positioning block 4061 at the bottom of the bottom flange 405 is embedded in the positioning groove 4062 of the top flange 405 to achieve precise docking of the flanges 405. The bolts 4071 on the inner wall of the bottom flange 405 pass through the bolt holes 4072 of the two flanges 405 to tighten them. The drainage groove 5 on the outer wall of the connecting sleeve 3 drains accumulated water to prevent the liquid from affecting the connecting parts.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.

Claims

1. A steel-core reinforced low wind pressure overhead insulated cable, comprising an insulation layer (1), characterized in that: The insulation layer (1) is provided with a cable body (2) inside, and the two ends of the insulation layer (1) are provided with connecting sleeves (3). The connecting sleeves (3) are provided with a connecting mechanism (4) inside, and the connecting mechanism (4) is used to connect the cable. The cable body (2) includes a shielding layer (201), the outer wall of the shielding layer (201) is connected to the inner wall of the insulation layer (1), the inner wall of the shielding layer (201) is connected to a plurality of aluminum wire conductors (202), the outer walls of the plurality of aluminum wire conductors (202) are connected to the same isolation layer (203) on adjacent sides, the inner wall of the isolation layer (203) is connected to a plurality of steel wire cores (204), the surface of the insulation layer (1) is uniformly provided with grooves, and the outside of the insulation layer (1) is provided with reinforcing components (205).

2. The steel-core reinforced low-air-pressure overhead insulated cable according to claim 1, characterized in that: The reinforcing component (205) includes multiple ribs (2051), the outer walls of the multiple ribs (2051) are fixedly connected to the inner wall of the insulating layer (1), and the groove is provided with multiple guide grooves (2052).

3. The steel-core reinforced low-air- pressure overhead power cable according to claim 1, characterized in that: Multiple drainage grooves (5) are provided on the outer walls of both of the two connecting sleeves (3), and lifting lugs (6) are connected to the outer walls of both of the two connecting sleeves (3).

4. The steel-core reinforced low-air- pressure overhead power cable according to claim 1, characterized in that: The connecting mechanism (4) includes a conductor crimping block (401). The outer walls of the conductor crimping block (401) are fixedly connected to the outer walls of the aluminum wire conductor (202) on adjacent sides. The top of the top conductor crimping block (401) is connected to a connecting protrusion (402). The bottom of the bottom conductor crimping block (401) is provided with a connecting groove (403). The conductor crimping block (401) is provided with a filling component (404) inside. The outer wall of the mating sleeve (3) is connected to a flange (405). The flange (405) is provided with a positioning component (406) on the opposite side. The flange (405) is provided with an installation component (407) on the opposite side. The flange (405) is provided with a sealing component (408) on the opposite side.

5. The steel-core reinforced low-air-pressure overhead cable according to claim 4, characterized in that: The filling component (404) includes a water-blocking filling block (4041), the outer wall of which is fixedly connected to the inner wall of the conductor crimping block (401), and an insulating filling block (4042) is connected to the outer wall of the conductor crimping block (401).

6. The steel-core reinforced low-air- pressure overhead cable according to claim 4, characterized in that: The positioning component (406) includes multiple positioning blocks (4061), the tops of which are fixedly connected to the bottom of the bottom flange (405), and the outer wall of the top flange (405) is provided with multiple positioning grooves (4062).

7. The steel-core reinforced low-air- pressure overhead power cable according to claim 4, characterized in that: The mounting assembly (407) includes a plurality of bolts (4071), the outer walls of which are threaded to the inner wall of the bottom flange (405), and the outer walls of both flanges (405) are provided with a plurality of bolt holes (4072).

8. The steel-core reinforced low-air- pressure overhead power cable of claim 4, wherein: The sealing assembly (408) comprises a waterproof sealing strip (4081), the top of which is fixedly connected to the bottom of the flange (405), and the top of the flange (405) is provided with a sealing groove (4082).

Images