Insulated bearing cable anchor

Abstract

The utility model provides a kind of insulating bearing cable anchor, comprising: connecting component, with power transmission line hardware connection and bear load;Core body lifting ring, accommodate the glass fiber reinforced silicone rubber wire harness wound to form core body and bear load;Clamp, the inner cavity of the clamp is horn shape, the horn shape inner cavity is consistent with the wire harness of the core body lifting ring wire slot tangent direction introduction, gather has been wound in the core body lifting ring, wire harness, which needs to be shaped, is shrunk into substantially cylindrical through the cylindrical outlet of the clamp;The connecting component is connected with the core body lifting ring, and the clamp is tightly clamped on the core body lifting ring. The utility model has the beneficial effects that: by the inner cavity of the clamp is horn shape, improve the stress state of wire harness, and by additionally provided glue injection hole groove A and glue injection hole B, form complete sealing structure after silicone rubber overall coating forming, improve the reliability of product and overall electromechanical performance.

Description

Technical fields:

[0001] This utility model relates to high-voltage power transmission and transformation technology, and in particular to an anchor for an insulated load-bearing cable. Background technology:

[0002] Existing structural fiber-reinforced composite cables are used for insulation and mechanical fixing between transmission lines and towers, operating under high voltage, alternating bending and torsional loads, and harsh natural environments.

[0003] However, existing cable anchors suffer from the following technical defects: After the cable and anchor are connected, there is no sealing mechanism, resulting in multiple structural gaps. These gaps, after prolonged exposure to rain and moisture, are prone to partial discharge and insulation degradation, severely impacting the cable's insulation performance. When the anchor forcibly contracts two parallel cable strands into a cylinder, it alters the direction of force on the parallel fiber-reinforced composite fibers. Due to insufficient contact area between the cable and anchor, the forced contraction of the rigid anchor leads to stress concentration in the cable. After the anchor and cable are connected, when the cable swings in the wind, asynchronous anchor movements cause friction between them, leading to wear and even breakage of the reinforcing fibers within the cable. These defects not only reduce the reliability of the cable anchors but also severely affect their overall electromechanical performance and service life. Utility model content:

[0004] To address the aforementioned problems, this utility model proposes an insulated load-bearing cable anchor.

[0005] The insulating load-bearing cable anchor proposed in this utility model includes a connecting component that connects to the transmission line fittings and bears the load; a core lifting ring that houses the glass fiber reinforced silicone rubber wire bundle that forms the core and bears the load; and a clamp with a flared inner cavity that fits against the wire bundle introduced tangentially into the core lifting ring's groove, gathering the wire bundle that needs to be shaped and is already wound inside the core lifting ring. The clamp's cylindrical outlet causes the front end of the wire bundle to contract into a generally cylindrical shape. The connecting component connects to the core lifting ring, and the clamp is tightly fitted onto the core lifting ring.

[0006] As a further improvement of this utility model, the core lifting ring includes a pair of connecting plates and an injection groove A, wherein the injection groove A is disposed at the contact surface between the connecting plates and the clamp.

[0007] As a further improvement of this utility model, the core lifting ring also includes an injection hole B, which is disposed on both sides of the connecting plate.

[0008] As a further improvement of this utility model, the core lifting ring also includes a wire groove, which is disposed between the two connecting plates.

[0009] As a further improvement of this utility model, the core lifting ring also includes a mandrel, and the mandrel has an irregular cross-section near the clamping side.

[0010] As a further improvement of this utility model, the mandrel has a polyhedral cross-section and has at least two symmetrically arranged planar bearing surfaces.

[0011] As a further improvement of this utility model, the surface of the connecting component, as well as the inner and outer surfaces of the core lifting ring and clamp, are provided with an anti-corrosion layer.

[0012] As a further improvement of this utility model, the anti-corrosion layer is a hot-dip galvanized layer.

[0013] As a further improvement of this utility model, the arc-shaped head of the core lifting ring covers the outside of the connecting member.

[0014] As a further improvement of this utility model, the insulated load-bearing cable anchor is formed by silicone rubber encapsulation to create a complete sealed structure.

[0015] The beneficial effects of this utility model are as follows: by setting the inner cavity of the clamp to a trumpet shape, the contact area of ​​the wire harnesses on both sides of the clamp shrink core lifting ring is increased, improving the stress state of the wire harnesses. At the same time, through the added glue injection groove A and glue injection hole B, after the silicone rubber is integrally encapsulated and molded, the gaps inside the insulating load-bearing cable anchor are eliminated, forming a complete sealed structure. This avoids partial discharge and insulation degradation caused by structural gaps, thereby improving the reliability of the product and its overall electromechanical performance and service life. Attached image description:

[0016] Figure 1 This is a schematic diagram of the disassembled structure of the insulated load-bearing cable anchor of this utility model;

[0017] Figure 2 This is a partially enlarged view of the insulated load-bearing cable anchor of this utility model;

[0018] Figure 3 This is a schematic diagram of the left and right connections of the clamp in this utility model;

[0019] Figure 4 This is a schematic cross-sectional view of the insulated load-bearing cable anchor of this utility model after it has been encapsulated and molded.

[0020] The correspondence between the reference numerals and the component names is as follows:

[0021] Connecting component—1; Core—3; Core lifting ring—5; Clamp—7; Connecting plate—8; Glue injection groove A—10;

[0022] Injection hole B—12; mandrel—14; annular screw hole—16; wire groove—18; silicone rubber sealing sleeve—20. Detailed implementation method:

[0023] The technical solutions in the embodiments of this utility model will be described in detail below with reference to the accompanying drawings. The embodiments are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0025] like Figures 1 to 4 As shown, the insulating load-bearing cable anchor provided by this utility model includes: a connecting component 1, a core 3, a core lifting ring 5, a clamp 7, a connecting plate 8, an injection groove A10, an injection hole B12, a mandrel 14, an annular screw hole 16, a wire groove 18, and a silicone rubber sealing jacket 20.

[0026] like Figures 1 to 4 As shown, the connecting member 1 is connected to the transmission line fittings and bears the load; the core lifting ring 5 accommodates the glass fiber reinforced silicone rubber wire bundle that makes up the core 3 and bears the load; the clamp 7 is divided into left and right parts, and the inner cavity of the clamp 7 is trumpet-shaped. The trumpet-shaped inner cavity fits with the wire bundle introduced in the tangential direction of the wire groove of the core lifting ring 5, and gathers the wire bundle that needs to be shaped after being wound in the core lifting ring 5. Through the cylindrical outlet of the clamp 7, the front end of the wire bundle is contracted into a roughly cylindrical shape; the connecting member 1 is connected to the core lifting ring 5, and the clamp 7 is tightly fitted onto the core lifting ring 5.

[0027] like Figure 1 and Figure 2As shown, the core lifting ring 5 specifically includes a pair of connecting plates 8, an injection groove A10, an injection hole B12, a mandrel 14, an annular screw hole 16, and a wire groove 18. The injection groove A10 is located at the contact surface between the connecting plate 8 and the clamp 7. The injection hole B12 is located on both sides of the connecting plate 8. The wire groove 18 is located between the two connecting plates 8 to accommodate the wound wire bundle. The mandrel 14 is located on the left side of the wire groove 18. The mandrel 14 near the clamp has an irregular cross-section, which is a polyhedral shape with at least two symmetrically arranged planar bearing surfaces. These planes match the shape of the gap after the wire bundle is wound to bear the axial pressure and transmit the axial load to the cable body. The annular screw hole 16 is located at the connection between the connecting plate 8 and the clamp 7. When the core lifting ring 5 is installed and connected to the clamp 7, the annular screw hole 16 reduces the error of the bolt connection between the two components and improves the installation efficiency of the connection between the insulating bearing anchor components.

[0028] like Figure 1 and Figure 4 As shown, after the core lifting ring 5 is installed and connected to the clamp 7 and connected to the core 3 by winding, silicone rubber is used to encapsulate and mold it through a mold. Silicone rubber is used to fill the gap between the bolt and the bolt hole through the injection groove A10; silicone rubber is used to fill the gap between the wire harness and the mandrel 14 through the injection hole B12; silicone rubber is used to fill all the gaps inside the insulating load-bearing cable anchor; silicone rubber is used to encapsulate the outside of the insulating load-bearing cable anchor using a mold to form an outer jacket; after the silicone rubber vulcanizes, the silicone rubber glass fiber wires impregnated with silicone rubber wrapped on the insulating load-bearing cable anchor are removed and cured. The gap between the insulated load-bearing cable anchors forms the silicone rubber sealing jacket 20, ensuring a completely sealed overall structure without gaps. The surface of the connecting member 1, as well as the inner and outer surfaces of the core lifting ring 5 and the clamp 7, are all provided with an anti-corrosion layer. This anti-corrosion layer is a hot-dip galvanized layer; that is, after hot-dip galvanizing anti-corrosion treatment, the connecting member 1, the core lifting ring 5, and the clamp 7 all have a hot-dip galvanized layer formed on their inner and outer surfaces. The arc-shaped head of the core lifting ring 5 covers the outside of the connecting member 1. The cross-section of the inner cavity of the connecting member 1 and the core lifting ring 5 is an anti-rotation structure. This structure matches the irregular hole of the equalizing ring connecting rod, preventing the installed equalizing ring from rotating. The shape of the core 3 is exemplary; its specific shape can be adapted to meet actual application requirements.

[0029] The technical requirements, test methods, inspection rules, marking and packaging of the insulated load-bearing cable anchor provided by this utility model shall refer to the relevant clauses of the following standards: Fiber reinforced composite cable for structural use (GB / T 35156-2017); Technical conditions for suspension insulator caps (JB / T 8178-1999).

[0030] The insulated load-bearing cable anchor provided by this utility model is classified according to the requirements of Clause 4 of standard JB / T8178-1999 and the relevant clauses of GB / T2315-2008 Nominal Destructive Load Series and Connection Dimensions of Power Fittings.

[0031] The insulating load-bearing cable anchor provided by this utility model shall have material properties that meet the requirements of Clause 5.1 of standard JB / T8178-1999 and conform to the material and physical and chemical properties requirements of the grades specified in GB / T9440 or GB / T91348.

[0032] The insulating load-bearing cable anchorage provided by this utility model has dimensional tolerances, shape tolerances and position tolerances in accordance with the requirements of clauses 5.3, 5.4 and 5.5 of standard JB / T8178-1999; and the relevant clauses of fiber reinforced composite cable for structural use (GB / T 35156-2017).

[0033] The insulated load-bearing cable anchorage provided by this utility model shall meet the requirements of Clause 5.5 of standard JB / T8178-1999 and the relevant clauses of fiber-reinforced composite cable for structural use (GB / T 35156-2017) in terms of casting quality.

[0034] The hot-dip galvanizing requirements of the insulated load-bearing cable anchor provided by this utility model shall comply with the requirements of Clause 5.6 of standard JB / T8177-1999.

[0035] The appearance quality of the insulated load-bearing cable anchor provided by this utility model shall meet the requirements of Clause 5.7 of standard JB / T8178-1999 and the relevant clauses of fiber-reinforced composite cable for structural use (GB / T 35156-2017).

[0036] The mechanical tensile strength of the insulated load-bearing cable anchor provided by this utility model shall meet the requirements of Clause 5.8 of standard JB / T8178-1999 and the relevant clauses of fiber-reinforced composite cable for structural use (GB / T 35156-2017).

[0037] The insulated load-bearing cable anchor proposed in this utility model increases the contact area of ​​the wire harnesses on both sides of the clamp's shrinking core ring by making the inner cavity of the clamp flared, thus improving the stress state of the wire harnesses. At the same time, the addition of injection groove A and injection hole B eliminates the internal gaps of the insulated load-bearing cable anchor after the silicone rubber is integrally encapsulated and molded, forming a gapless whole. This avoids partial discharge and insulation degradation caused by structural gaps, thereby improving the reliability of the product, as well as its overall electromechanical performance and service life.

[0038] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered as belonging to the present invention.

Claims

1. An insulated load-bearing cable anchor, characterized in that, include: The connecting component (1) is connected to the transmission line fittings and bears the load; The core lifting ring (5) accommodates the glass fiber reinforced silicone rubber wire bundle that forms the core (3) and bears the load; The clamp (7) has a horn-shaped inner cavity. The horn-shaped inner cavity fits with the wire bundle introduced in the tangential direction of the wire groove of the core lifting ring (5). The wire bundle that has been wound in the core lifting ring (5) and needs to be shaped is gathered. The wire bundle is then condensed into a roughly cylindrical shape at the cylindrical outlet of the clamp (7). The connecting member (1) is connected to the core lifting ring (5), and the clamp (7) is tightly fitted onto the core lifting ring (5).

2. The insulated load-bearing cable anchor according to claim 1, characterized in that: The core lifting ring (5) includes a pair of connecting plates (8) and an injection groove A (10), wherein the injection groove A (10) is located at the contact surface between the connecting plate (8) and the clamp (7).

3. The insulated load-bearing cable anchor according to claim 2, characterized in that: The core lifting ring (5) also includes an injection hole B (12), which is located on both sides of the connecting plate (8).

4. The insulated load-bearing cable anchor according to claim 2, characterized in that: The core lifting ring (5) also includes a wire groove (18), which is disposed between the two connecting plates (8).

5. The insulated load-bearing cable anchor according to claim 1, characterized in that: The core lifting ring (5) also includes a mandrel (14).

6. The insulated load-bearing cable anchor according to claim 1, characterized in that: The surface of the connecting component (1) and the inner and outer surfaces of the core lifting ring (5) and clamp (7) are all provided with anti-corrosion layers.

7. The insulated load-bearing cable anchor according to claim 6, characterized in that: The anti-corrosion layer is a hot-dip galvanized layer.

8. The insulated load-bearing cable anchor according to claim 1, characterized in that: The arc-shaped head of the core ring (5) covers the outside of the connecting member (1).

9. The insulated load-bearing cable anchorage according to any one of claims 1-8, characterized in that: The insulated load-bearing cable anchor is molded by silicone rubber coating to form a complete sealed structure.

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