CN205789339U - A kind of 35kV transmission overhead line labyrinth type insulated sleeve - Google Patents

Abstract

The utility model relates to a labyrinth insulating bushing for a 35kV power transmission overhead line, which comprises a first connecting section of the insulating bushing, an insulating bushing section and a tail connecting section of the insulating bushing. The first connection section of the insulating bushing is a casing structure with side openings. One end of the opening is provided with the first connection section cable casing edge A, and the other end is provided with the first connection section cable casing edge B. The two form a "back" shape. First hemming structure. The insulating sleeve section is a casing structure with side openings. One end of the opening is provided with an insulating sleeve segment cable shell wrapping A, and the other end is provided with an insulating sleeve section cable shell wrapping B. The two form a "back" shape insulating wrapping structure. The tail connection section of the insulating bushing is a casing structure with side openings. One end of the opening is provided with the cable shell edge A of the tail connection section, and the other end is provided with the cable shell edge B of the tail connection section. The two form a "back" shape. Tail bound construction. The new model adopts a labyrinth insulating sleeve structure, which greatly reduces the possibility of flashover along the surface of the 35kV transmission overhead line.

Description

A Labyrinth Insulation Sleeve for 35kV Transmission Overhead Lines

technical field

The utility model relates to a 35kV power transmission overhead line insulating bushing, in particular to a 35kV power transmission overhead line labyrinth insulating bushing, which belongs to the field of 35kV power transmission devices.

Background technique

The 35kV overhead line has a vast territory and a large transmission power, and it is the backbone of the distribution network transmission. Due to the high rated voltage of 35kV voltage level wires, if the 10kV insulated wire manufacturing process is also used to add an insulating layer on the surface of the bare wire, the weight of the wire will double, resulting in a double increase in the bending strength of the transmission line insulator and the tensile strength of the pole. Thereby causing the problem that the current overhead transmission line structure cannot carry. Because of the above reasons, the current national 35kV and above transmission overhead lines still use bare conductors. With the continuous advancement of rural urbanization, a large number of road infrastructure, construction sites and high-rise buildings have appeared beside the original 35kV overhead transmission line, resulting in recent years due to construction machinery, high-rise parabolic objects, kites, balloons, etc. colliding with 35kV overhead bare wires. Accidents such as electric shock, short circuit, and tripping that affect personal safety and transmission safety occur from time to time, bringing great harm to people's lives and power grid safety.

The concept of overhead line insulation has been proposed for a long time, and it has been widely used on 10kV transmission and distribution overhead lines, and has achieved relatively ideal results, but the application on 35kV transmission and distribution overhead lines is still in the exploration stage. This is mainly because the insulation cover of the conventional structure type used for 10kV transmission and distribution overhead lines has several difficulties in the application of 35kV transmission and distribution overhead lines: First, due to the increase in operating voltage, to achieve safe insulation performance, the insulation cover Thickness is about to increase, which is accompanied by an increase in cost and a substantial increase in the weight of overhead lines, causing a series of subsequent problems. Second, as the voltage increases, the possibility of flashover along the surface is far greater than that of breakdown flashover, and the insulating cover with conventional structure cannot meet the requirements in this respect.

Contents of the invention

The utility model 35kV power transmission overhead line labyrinth insulating bushing discloses a new scheme, adopts a brand-new labyrinth insulating bushing structure, greatly reduces the possibility of flashover along the surface of the 35kV power transmission overhead line, and solves the problem of existing 35kV power transmission overhead line The problem of line insulation.

The utility model is a labyrinth insulating bushing for 35kV power transmission overhead line, which comprises an insulating bushing first connecting section, an insulating bushing section and an insulating bushing tail connecting section, an insulating bushing first connecting section, an insulating bushing section and an insulating bushing tail connecting section Seamlessly connected successively to form the whole insulating sleeve.

The first connecting section of the insulating bushing includes the cable housing of the first connecting section. The cable housing of the first connecting section is a casing structure with the side opening along the axial direction. The side of the cable housing of the first connecting section is provided with a first connecting section The cable housing edge A, the side of the cable housing of the first connecting section along the other end of the axial opening is provided with the cable housing edge B of the first connecting section, the cable housing edge B of the first connecting section is along the cable housing of the first connecting section The edge of the wrapping armor is folded and covered on the outer surface of the first connecting section cable shell wrapping armor to form a "back" shaped labyrinth first wrapping structure.

The insulating bushing section includes the insulating bushing section cable housing, the insulating bushing section cable housing is a casing structure with side openings along the axial direction, and the side of the insulating bushing section cable housing is provided with an insulating bushing section cable housing at one end of the axial opening Edge wrapping A, the side of the cable shell of the insulating sleeve section along the other end of the axial opening is provided with the edge wrapping of the cable casing section of the insulating sleeve section B, the edge wrapping B of the cable shell of the insulating sleeve section is along the cable shell edge A of the insulating sleeve section The edge of the insulation sleeve is folded and covered on the outer surface of the cable casing of the insulating sleeve section to form a "back"-shaped labyrinth insulation wrapping structure.

The tail connection section of the insulating sleeve includes a cable housing of the tail connection section. The cable housing of the tail connection section is a casing structure with an axial opening on the side. The side of the cable housing of the tail connection section is provided with a tail connection section at one end of the axial opening The side of the cable housing side A, the side of the cable housing of the tail connection section is along the other end of the axial opening. The edge of the hemming armor is folded and covered on the outer surface of the hemming armor of the cable housing of the tail connection section to form a "back" shape labyrinth tail hemming structure.

Further, the surface of the first connecting section cable shell wrapping B and the first connecting section cable shell wrapping A outer covering combined surface is provided with a nail structure I, and the first connecting section cable shell wrapping A sinkhole structure I is provided on the outer surface of the nail, and the nail structure I is pressed together with the sinkhole structure I to form an anti-loosening buckle structure I.

The surface of the insulating bushing section cable shell wrapping B and the insulating bushing section cable shell wrapping A outer surface coating combination is provided with a nail structure II, and the insulating bushing section cable shell wrapping A outer surface A sinkhole structure II is provided on the surface, and the nail structure II is pressed together with the sinkhole structure II to form an anti-loosening buckle structure II.

The surface of the cable casing edge B of the tail connection section and the outer surface of the cable casing edge A of the tail connection section is combined with a nail structure III on the surface, and the cable casing edge A outer surface of the tail connection section A sinkhole structure III is provided on the surface, and the nail structure III is pressed together with the sinkhole structure III to form an anti-loosening buckle structure III.

Further, the nail-pressing structure I, nail-pressing structure II and nail-pressing structure III are a nail-pressing bar structure A integrated in the axial direction, and the sinkhole structure I, sinkhole structure II and sinkhole structure III are along the An axially integrated sinkhole groove structure A, the nail-pressing strip structure A and the sinkhole groove structure A are pressed together to form an anti-loosening buckle structure A.

Further, on the surface where the cable shell wrapping B of the insulating sleeve section is combined with the inner surface of the cable shell wrapping A of the insulating bushing section, a nail structure II' is provided, and the cable shell wrapping A of the insulating bushing section A sinkhole structure II' is provided on the inner surface, and the nail structure II' is pressed together with the sinkhole structure II' to form an anti-loosening buckle structure II';

The surface of the cable shell edge B of the tail connection section combined with the inner surface of the cable shell edge A of the tail connection section is provided with a nail structure III', and the inner surface of the cable shell edge A of the tail connection section There is a sinkhole structure III' on it, and the nail structure III' is pressed together with the sinkhole structure III' to form an anti-loosening buckle structure III'.

Further, the nail structure II' and the nail structure III' are a nail bar structure B integrated in the axial direction, and the sinkhole structure II' and the sinkhole structure III' are integrated in the axial direction The sinkhole structure B, the nail-pressing strip structure B is pressed together with the sinkhole structure B to form the anti-loosening buckle structure B.

Further, the inner diameter of the cable housing of the first connection section is larger than the inner diameter of the cable housing of the tail connection section, and the inner surface of the first connection section cable housing edge B and the first connection section cable shell edge A There is a slot cavity of tail-wrapping structure between them, and the slot cavity of tail-wrapping structure and the inner lumen of the cable housing of the first connecting section form the whole inner cavity of the cable housing of the first connecting section, and the cable housing of the tail connecting section The free end of the body can be inserted into the free end of the inner cavity of the cable housing of the first connecting section to form a sealed and connected plug-in structure.

Further, a locking through-hole structure is provided on the side armor of the cable shell of the first connecting section, and a locking screw is arranged in the locking through-hole structure, and the locking screw is connected to the inside of the locking through-hole structure. Forming internal and external thread connections, the locking screw is screwed into or out of the slot cavity of the tail wrapping structure through the locking through hole structure, and the locking screw is screwed into the slot cavity of the tail wrapping structure against The tail wrapping structure tightly inserted into the slot cavity of the tail wrapping structure forms a locking structure, and the locking screw is unscrewed out of the slot cavity of the tail wrapping structure to be disconnected and connected to the tail wrapping structure The tail wrapping structure in the socket cavity forms a detachable plug-in structure.

Further, the inner wall of the cable casing of the insulating sleeve section is provided with several reinforcing rib rings in the axial direction, and the inner diameter of the reinforcing rib rings is larger than the outer diameter of the bare wire.

Further, the material of the labyrinth insulating bushing for the 35kV power transmission overhead line is a silicon rubber material with a thickness greater than or equal to 2.5 mm.

The utility model 35kV power transmission overhead line labyrinth insulating bushing adopts a new labyrinth insulating bushing structure, which greatly reduces the possibility of surface flashover of the 35kV power transmission overhead line and improves the safety of the 35kV power transmission overhead line.

Description of drawings

Fig. 1 is a schematic cross-sectional view of an insulating bushing used in an existing 10kV overhead line.

Fig. 2 is a schematic diagram of a labyrinth insulating bushing for a 35kV power transmission overhead line of the present invention.

Fig. 3 is a schematic cross-sectional view of A-A of the first connection section of the insulating bushing in Fig. 2 .

Fig. 4 is a schematic cross-sectional view of section B-B of the insulating bushing in Fig. 2 .

Fig. 5 is a schematic cross-sectional view of C-C section of the insulating bushing tail connection section in Fig. 2 .

Among them, 100 is the first connection section of the insulating bushing, 110 is the first connection section cable shell edge A, 120 is the first connection section cable shell edge B, 130 is the anti-loosening buckle structure I, and 140 is the tail wrapping structure plug Groove cavity, 150 is the locking through hole structure, 200 is the insulating bushing section, 210 is the cable shell wrapping A of the insulating bushing section, 220 is the cable shell wrapping B of the insulating bushing section, 230 is the anti-loosening buckle structure II, 240 250 is the reinforcing rib ring, 300 is the tail connection section of the insulating sleeve, 310 is the cable shell edge A of the tail connection section, 320 is the cable shell edge B of the tail connection section, and 330 is the anti The loose buckle structure III, 340 is the anti-loosen buckle structure III'.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, a schematic diagram of an insulating bushing used in an existing 10kV overhead line. The structure is an open sleeve structure with an "Ω"-shaped cross section, which is locked by the pins at the opening. A prominent problem when this structure is applied to 35kV transmission overhead lines is that the overlapping edges of the insulating bushings are short, which is prone to flashover along the surface. In order to solve this problem, this scheme adopts the "back" shape labyrinth insulating sleeve. Figure 2 shows the external schematic diagram of the insulating bushing of this scheme, that is, the labyrinth insulating bushing of the 35kV transmission overhead line includes the first connecting section of the insulating bushing, the insulating bushing section and the tail connecting section of the insulating bushing, the first connecting section of the insulating bushing, The insulating bushing section and the insulating bushing tail connection section are successively seamlessly connected to form the whole insulating bushing. The first connecting section of the insulating bushing includes the cable housing of the first connecting section. The cable housing of the first connecting section is a casing structure with the side opening along the axial direction. The side of the cable housing of the first connecting section is provided with a first connecting section The cable housing edge A, the side of the cable housing of the first connecting section along the other end of the axial opening is provided with the cable housing edge B of the first connecting section, the cable housing edge B of the first connecting section is along the cable housing of the first connecting section The edge of the wrapping armor is folded and covered on the outer surface of the first connecting section cable shell wrapping armor to form a "back" shaped labyrinth first wrapping structure. The insulating bushing section includes the insulating bushing section cable housing, the insulating bushing section cable housing is a casing structure with side openings along the axial direction, and the side of the insulating bushing section cable housing is provided with an insulating bushing section cable housing at one end of the axial opening Edge wrapping A, the side of the cable shell of the insulating sleeve section along the other end of the axial opening is provided with the edge wrapping of the cable casing section of the insulating sleeve section B, the edge wrapping B of the cable shell of the insulating sleeve section is along the cable shell edge A of the insulating sleeve section The edge of the insulation sleeve is folded and covered on the outer surface of the cable casing of the insulating sleeve section to form a "back"-shaped labyrinth insulation wrapping structure. The tail connection section of the insulating sleeve includes a cable housing of the tail connection section. The cable housing of the tail connection section is a casing structure with an axial opening on the side. The side of the cable housing of the tail connection section is provided with a tail connection section at one end of the axial opening The side of the cable housing side A, the side of the cable housing of the tail connection section is along the other end of the axial opening. The edge of the hemming armor is folded and covered on the outer surface of the hemming armor of the cable housing of the tail connection section to form a "back" shape labyrinth tail hemming structure. As shown in Figures 3 to 5, the above-mentioned "back" shaped labyrinth wrapping structure is specifically that one side wrapping (longer side) is folded and the other side wrapping (shorter side) is sandwiched in it to form a rotation. On the combined surface, this kind of hemming structure is not limited to the one-layer sandwich shown in the figure, and can also be folded again on the basis of a layer of sandwich to form a multi-layer sandwich structure, that is, the above-mentioned "back" shaped insulating bag The edge structure is folded again to form a multi-layer labyrinth wrapping structure. The above-mentioned "back"-shaped wrapping structure increases the length of the inner surface of the insulating bushing, thereby extending the length of flashover along the surface, effectively improving the safety performance of the insulating bushing, and also overcoming the locking structure of the existing 10kV overhead line insulating bushing. The stress concentration at the hole reduces the mechanical properties of the structure and leads to the problem that the insulating sleeve is easy to crack.

The "back" shaped insulation wrapping structure of this scheme can be bonded with insulating glue to form a one-time closed structure, but this structure has poor maintainability and cannot be disassembled for maintenance. In order to solve this problem, this scheme discloses a groove The buckle structure is used to realize the firm combination of the wrapping, that is, the surface of the first connecting section cable casing wrapping B and the outer surface of the first connecting section cable casing wrapping A is combined with a horseshoe-shaped nail structure I, and the first connecting section A horseshoe-shaped sinkhole structure I is provided on the outer surface of the wrapping armor of the cable housing, and the horseshoe-shaped nail structure I is pressed together with the horseshoe-shaped sinkhole structure I to form an anti-loosening buckle structure I. There is a horseshoe-shaped nail structure II on the surface where the cable shell wrapping B of the insulating bushing section and the outer surface of the cable shell wrapping A of the insulating bushing section are combined, and the outer surface of the cable shell wrapping A of the insulating bushing section is provided with The horseshoe-shaped sinkhole structure II, the horseshoe-shaped nail structure II and the horseshoe-shaped sinkhole structure II are pressed together to form the anti-loosening buckle structure II. There is a horseshoe-shaped nail structure III on the surface where the cable shell wrapping B of the tail connection section is combined with the outer surface of the cable shell wrapping A of the tail connection section, and the outer surface of the cable shell wrapping A of the tail connection section is provided with The horseshoe-shaped sinkhole structure III, the horseshoe-shaped nail structure III and the horseshoe-shaped sinkhole structure III are pressed together to form the anti-loosening buckle structure III. The introduction of the above-mentioned horse-shoe-shaped anti-loosening buckle structure improves the maintainability of the "back"-shaped labyrinth insulation wrapping structure, and the installation and disassembly are more convenient, and the casing body structure of the insulation casing is not changed. Based on the seamless connection of the first connecting section of the insulating bushing, the insulating bushing section and the insulating bushing tail connecting section to form the overall structural frame of the insulating bushing, the horseshoe-shaped nail structure and the horseshoe-shaped sinkhole structure of this scheme can also be designed as The integrated structure, that is, the horseshoe-shaped nail structure I, the horse-shoe-shaped nail structure II and the horse-shoe-shaped nail structure III is the nail strip structure A with a horseshoe-shaped cross-section that is integrated in the axial direction, and the horseshoe-shaped sinkhole Structure I, horseshoe-shaped sinkhole structure II and horseshoe-shaped sinkhole structure III are the sinkhole structure A with a horseshoe-shaped cross-section connected in the axial direction, and the nail bar structure A is pressed together with the sinkhole structure A to form an anti- Loose buckle structure A. This continuous pressing structure makes the packaging operation of the insulating sleeve similar to the zipper process, which not only has the convenience of operation, but also improves the sealing performance of the packaging. At the same time, the packaging structure is stable and not easy to crack and fall off.

In order to further strengthen the stability of the combination of the "back"-shaped insulation wrapping structure and make the wrapping structure more difficult to slit and fall off, this scheme adds an anti-loose buckle structure on the basis of the above scheme, as shown in Figures 4 and 5, that is There is a horseshoe-shaped nail structure II′ on the surface where the cable shell wrapping B of the insulating bushing section is combined with the inner surface of the cable shell wrapping A of the insulating bushing section, and a riding shoe is provided on the inner surface of the cable shell wrapping A of the insulating bushing section shaped sinkhole structure II', and the horseshoe-shaped nail structure II' is pressed together with the horseshoe-shaped sinkhole structure II' to form the anti-loosening buckle structure II'. There is a horseshoe-shaped nail structure III' on the surface where the cable shell wrapping B of the tail connection section is combined with the inner surface of the cable shell wrapping A of the tail connection section, and a riding shoe is provided on the inner surface of the cable shell wrapping A of the tail connection section shaped sinkhole structure III', and the horseshoe-shaped nail structure III' is pressed together with the horseshoe-shaped sinkhole structure III' to form the anti-loosening buckle structure III'. Same as the basic scheme above, the strengthening scheme also designs the horseshoe-shaped nail structure and the horseshoe-shaped sinkhole structure into an integrated structure, that is, the horseshoe-shaped nail structure II' and the horseshoe-shaped nail structure III' are connected along the axial direction. The integrated nail strip structure B with a horseshoe-shaped cross section, the horseshoe-shaped sinkhole structure II' and the horseshoe-shaped sinkhole structure III' are the sinkhole groove structures B with a horseshoe-shaped cross-section that are integrated in the axial direction, and the nails The bar structure B is pressed together with the sinkhole structure B to form the anti-loosening bar buckle structure B. Likewise, this reinforced press-fit structure improves the structural strength and sealing performance of the insulating sleeve package.

In order to meet the requirements of full insulation coverage of 35kV transmission overhead lines, the insulating sleeve of this scheme adopts the scheme of standard tube socketing, that is, multiple standard insulating sleeves are socketed end-to-end to achieve full coverage of cables. In order to achieve the above-mentioned technical purpose, the insulating sleeve of this scheme is designed to be end-to-end nested, that is, the inner diameter of the cable shell of the first connection section is larger than the inner diameter of the cable shell of the tail connection section, and the edge B of the cable shell of the first connection section A tail-wrapping structure slot cavity is provided between the inner surfaces of the first connection section cable shell shell armor, and the tail-wrap structure slot cavity and the inner tube cavity of the first connection section cable shell form an overall inner cavity of the first connection section cable shell. The free end of the cable housing of the tail connecting section can be inserted into the free end of the inner cavity of the cable housing of the first connecting section to form a sealed and connected plug-in structure. This plug-in structure enables the insulating sleeve to be infinitely extended according to actual needs, and is convenient for disassembly and assembly, which improves the maintainability of the overall line insulating sleeve. In actual use, due to the influence of external environmental factors, such as strong winds, heavy precipitation, etc., the overhead cables are in a swaying working state, and the sleeve structure based on the above-mentioned plugging is easy to loosen or even detach during frequent disorderly movements. To solve this problem, this scheme also discloses a scheme to enhance the stability of plugging, that is, a locking through-hole structure is provided on the edge armor of the cable shell of the first connection section, and a locking screw is provided in the locking through-hole structure to lock The screw and the locking through-hole structure form an internal and external thread connection, the locking screw is screwed into or out of the slot cavity of the tail-wrapping structure through the locking through-hole structure, and the locking screw is screwed into the slot cavity of the tail-wrapping structure for tight insertion The tail wrapping structure connected in the slot cavity of the tail wrapping structure forms a locking structure, and the locking screw is unscrewed out of the slot cavity of the tail wrapping structure to break away from the tail wrapping structure inserted in the slot cavity of the tail wrapping structure to form Detachable plug structure. The introduction of the locking through-hole structure strengthens the connection stability of the adjacent socketed insulating tubes, and at the same time facilitates disassembly, and the locking parts of this solution are not limited to the matching method of screws and threads, and can also be fastened by pins .

The existing 10kV overhead line insulation bushing and its modification are applied to the 35kV transmission overhead line. The inner wall of the bushing of the same type of product is in direct contact with the bare wire. Under the disturbance of external force, the cable will swing irregularly. , resulting in frequent friction between the inner wall of the insulating sleeve and the surface of the bare wire, resulting in wear and even cracking from the inside of the insulating sleeve, eventually leading to insulation failure. In order to solve this problem, this scheme sets a ring-shaped reinforcing rib inside the insulating tube, as shown in Figures 2 and 4, that is, there are several reinforcing rib rings along the axial direction on the inner wall of the cable housing of the insulating sleeve section, and the inner diameter of the reinforcing rib ring greater than the outer diameter of the bare conductor. This scheme of using several reinforcing ribs to cover the bare wire not only strengthens the mechanical properties of the insulating tube itself, but also isolates the bare wire from the inner wall of the insulating sleeve, creating a gap between the inner wall of the insulating tube and the bare wire, which not only prevents the gap between the two. friction, but also conducive to air convection heat dissipation in the gap. In order to meet the requirements of cable insulation and take into account the bearing capacity of the erection structure, the insulating sleeve of this scheme optimizes the material and product size, that is, the material of the labyrinth insulating sleeve for 35kV transmission overhead lines is thicker than or equal to 2.5mm silicone rubber material. The dielectric strength of silicone rubber is very high. Silicon rubber with a thickness of 1mm can withstand a 20kV withstand voltage test. The experiment proves that as long as the thickness of the silicone rubber insulating cover is designed to be more than 2.5mm, it can meet the needs of actual use, and this thickness is quite The thickness of the insulating cover is used at 10kV.

The conventional structure of the insulating bushing currently in use is evolved from the insulation scheme of the 10kV overhead bare wire. This structure can be used normally in the 10kV system, but for the overhead line of the 35kV voltage level, there are the following defects : ⑴The inner surface of the insulating sleeve is in direct contact with the bare wire. Under the action of wire galloping and wind force, the inner surface of the insulating sleeve is gradually worn, resulting in a decrease in insulation performance; ⑵The inner surface of the insulating sleeve is in direct contact with the bare wire, and there is no air layer in the middle , it is not easy to form heat convection, which is not conducive to heat dissipation; (3) due to the short distance of the insulating sleeve, flashover along the surface is prone to occur; (4) the button-type joint structure will form stress concentration at the opening of the insulating layer, reduce mechanical properties, and cause cracking . The 35kV transmission overhead line labyrinth insulating bushing of this scheme adopts a new "back" shape labyrinth insulating bushing structure, which greatly reduces the possibility of flashover along the surface of the 35kV transmission overhead line, and at the same time avoids changing the structure of the bushing to overcome To solve the problem of reducing the mechanical performance of the structure caused by multiple openings, the horseshoe-shaped anti-loosening buckle structure adopted effectively strengthens the stability of the labyrinth structure and prevents its slits from falling off. The scheme meets the requirements of the full insulation coverage of the cable, and at the same time increases the overall maintainability of the insulating sleeve. The scheme of adding a ring-shaped reinforcing rib inside the insulating sleeve avoids the inside of the sleeve on the basis of improving the overall mechanical properties of the sleeve. The wear problem caused by the direct contact between the wall and the bare wire, and the gap between them also improves the heat dissipation performance of the wire. The insulating sleeve is made of silicone rubber material with a thickness of 2.5mm (and above), which ensures the insulation performance. The size and weight of the cable are optimized, taking into account the structural bearing capacity of the erection device. Based on the above characteristics, the labyrinth insulation bushing for 35kV transmission overhead lines of this scheme has substantial characteristics and progress compared with the existing insulation schemes for transmission overhead lines.

The 35kV power transmission overhead line labyrinth insulating bushing of this scheme is not limited to the content disclosed in the specific implementation. The technical schemes appearing in the embodiments can exist independently or include each other. Those skilled in the art can make according to this scheme combined with common knowledge. The simple replacement scheme of also belongs to the scope of this scheme.

Claims (9)

1. a 35kV transmission overhead line labyrinth type insulated sleeve, is characterized in that including insulated sleeve head linkage section, insulation sleeve Pipeline section and insulated sleeve tail linkage section, described insulated sleeve head linkage section, insulation sleeve pipeline section and insulated sleeve tail linkage section are successively It is overall that seamless connection forms insulated sleeve；

Described insulated sleeve head linkage section include first linkage section cable housing, described first linkage section cable housing be side vertically The sleeve structure of opening, one end of the side opening vertically of described first linkage section cable housing is provided with first linkage section cable housing Bound edge first, the other end of the side opening vertically of described first linkage section cable housing is provided with first linkage section cable housing bound edge Second, described first linkage section cable housing bound edge second is coated on described along the edge fold of described first linkage section cable housing bound edge first " returning " shape labyrinth type head binding structure is formed on first linkage section cable housing bound edge first outer surface；

Described insulation sleeve pipeline section includes insulation sleeve pipeline section cable housing, and described insulation sleeve pipeline section cable housing is that side is opened vertically The sleeve structure of mouth, one end of the side opening vertically of described insulation sleeve pipeline section cable housing is provided with insulation sleeve pipeline section cable shell Body bound edge first, the other end of the side opening vertically of described insulation sleeve pipeline section cable housing is provided with insulation sleeve pipeline section cable housing Bound edge second, described insulation sleeve pipeline section cable housing bound edge second is along the edge fold bag of described insulation sleeve pipeline section cable housing bound edge first Overlay on formation " returning " shape labyrinth type insulated covering edge structure on described insulation sleeve pipeline section cable housing bound edge first outer surface；

Described insulated sleeve tail linkage section include tail linkage section cable housing, described tail linkage section cable housing be side vertically The sleeve structure of opening, one end of the side opening vertically of described tail linkage section cable housing is provided with tail linkage section cable housing Bound edge first, the other end of the side opening vertically of described tail linkage section cable housing is provided with tail linkage section cable housing bound edge Second, described tail linkage section cable housing bound edge second is coated on described along the edge fold of described tail linkage section cable housing bound edge first " returning " shape labyrinth type tail binding structure is formed on tail linkage section cable housing bound edge first outer surface.

35kV transmission overhead line labyrinth type insulated sleeve the most according to claim 1, it is characterised in that described first connection The surface that section cable housing bound edge second combines with described first linkage section cable housing bound edge first outer surface cladding is provided with nail pressing knot Structure I, described first linkage section cable housing bound edge first outer surface is provided with heavy hole structure I, described nail pressing structure I and heavy hole structure I Pressing forms locking buckle structure I；

Described insulation sleeve pipeline section cable housing bound edge second combines with described insulation sleeve pipeline section cable housing bound edge first outer surface cladding Surface be provided with nail pressing structure I I, described insulation sleeve pipeline section cable housing bound edge first outer surface is provided with heavy hole structure I I, institute State nail pressing structure I I and form locking buckle structure II with heavy hole structure I I pressing；

The table that described tail linkage section cable housing bound edge second combines with described tail linkage section cable housing bound edge first outer surface cladding Face is provided with nail pressing structure III, and described tail linkage section cable housing bound edge first outer surface is provided with heavy hole structure III, described pressure Pin structure III forms locking buckle structure III with heavy hole structure III pressing.

35kV transmission overhead line labyrinth type insulated sleeve the most according to claim 2, it is characterised in that described nail pressing is tied Structure I, nail pressing structure I I and nail pressing structure III are nail pressing bar structures A being connected vertically, described heavy hole structure I, heavy hole knot Structure II and heavy hole structure III are heavy pit structures A being connected vertically, and described nail pressing bar structure A is pressed with heavy pit structure A Close and form locking bar buckle structure A.

35kV transmission overhead line labyrinth type insulated sleeve the most according to claim 2, it is characterised in that described insulation sleeve Pipeline section cable housing bound edge second is provided with nail pressing knot with the surface that described insulation sleeve pipeline section cable housing bound edge first inner surface is combined Structure II ', described insulation sleeve pipeline section cable housing bound edge first inner surface is provided with heavy hole structure I I ', described nail pressing structure I I ' and sinks Hole structure I I ' pressing forms locking buckle structure II '；

Described tail linkage section cable housing bound edge second is on the surface that described tail linkage section cable housing bound edge first inner surface is combined Being provided with nail pressing structure III ', described tail linkage section cable housing bound edge first inner surface is provided with heavy hole structure III ', described nail pressing Structure III ' forms locking buckle structure III ' with heavy hole structure III ' pressing.

35kV transmission overhead line labyrinth type insulated sleeve the most according to claim 4, it is characterised in that described nail pressing is tied Structure II ' and nail pressing structure III ' are nail pressing bar structures B being connected vertically, described heavy hole structure I I ' and heavy hole structure III ' is heavy pit structure B being connected vertically, and described nail pressing bar structure B and heavy pit structure B pressing form locking bar Buckle structure B.

35kV transmission overhead line labyrinth type insulated sleeve the most according to any one of claim 1 to 5, its feature exists In, the internal diameter of described first linkage section cable housing is more than the internal diameter of described tail linkage section cable housing, described first linkage section cable It is provided with tail binding structure slot chamber, described tail bag between the inner surface of housing bound edge second and described first linkage section cable housing bound edge first Structure slot chamber, limit is overall with the interior segment dislocation head linkage section cable housing cavity of described first linkage section cable housing, described tail The free end that the free end of linkage section cable housing can be inserted into described first linkage section cable housing cavity overall forms sealing connection Connected structure.

35kV transmission overhead line labyrinth type insulated sleeve the most according to claim 6, it is characterised in that described first connection Section cable housing bound edge first is provided with locking through-hole structure, is provided with lock screw, described locking screw in described locking through-hole structure Silk is internally formed internal and external threads with described locking through-hole structure and is connected, and described lock screw is screwed in by described locking through-hole structure Or screw out described tail binding structure slot chamber, described lock screw screw in described tail binding structure slot chamber push against be plugged on described The tail binding structure of tail binding structure slot intracavity forms locking mechanism, and described lock screw screws out described tail binding structure slot Chamber disengaging is plugged on the tail binding structure of described tail binding structure slot intracavity and forms dismountable connected structure.

8. according to the 35kV transmission overhead line labyrinth type insulated sleeve described in any one of claim 1 to 5, it is characterised in that Being provided with some reinforcing rib rings vertically in described insulation sleeve pipeline section cable inner walls, the internal diameter of described reinforcing rib ring is led more than naked The external diameter of line.

9. according to the 35kV transmission overhead line labyrinth type insulated sleeve described in any one of claim 1 to 5, it is characterised in that The material of described 35kV transmission overhead line labyrinth type insulated sleeve is the silastic material that thickness is more than or equal to 2.5mm.