Overhead conductor insulating sleeve for high-voltage transmission line

Abstract

The utility model relates to an overhead conductor insulating sleeve for a high-voltage power transmission line, which comprises a plurality of sections of pipe sleeves sleeved on the outer side of a cable, and is characterized by further comprising a plurality of groups of fixing parts, the fixing parts are clamped at the joints of two adjacent sections of pipe sleeves, so that the fixing parts fix the position states of the pipe sleeves, the pipe sleeves comprise sleeving sections, and the sleeving sections are sleeved on the outer side of the cable. The sleeve joint section is a soft modified polyethylene pipe, an opening and closing center joint with the length equal to that of the sleeve joint section is formed in the top of the outer wall of the sleeve joint section, extending sections fixedly connected with the sleeve joint section are arranged on the two opposite sides of the opening and closing center joint, and first auxiliary sealing sections which are symmetrical to each other are formed on the opposite sides of the two extending sections. Through cooperation of the pipe sleeve and the fixing piece, the pipe sleeve can be conveniently fixed to the outer side of the cable to wrap and protect the cable, water can be prevented from leaking into a gap between the pipe sleeve and the cable from the opening and closing center joint, and the protection effect of the pipe sleeve on the cable is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of insulating bushings, in particular to an insulating bushing for overhead conductors used in high-voltage power transmission lines. Background Art

[0002] With the rapid development of the distribution network, the power supply area is covered by trees, and the influence of many factors such as severe corrosion and typhoons has brought new difficulties to the reliability of the distribution network. Due to the various threats posed by nature to the distribution network, overhead insulated wires have been created. Since the overhead insulated wires can withstand a voltage of 15kV, the minimum vertical distance between the insulated wire and the building is 1m, and the horizontal distance is 0.75m. Therefore, it is an effective distribution method to replace the low-voltage trunk line with a 10kV overhead insulated wire and directly send it to the load center to shorten the power supply radius of the low-voltage power grid.

[0003] Most of the existing insulated conductors are manually wound with insulating tape on the surface of the overhead conductors. During the winding process, the workers need to move with the winding position of the conductors, which is not only cumbersome, but also takes a lot of time, affecting work efficiency. For this reason, the utility model patent with Chinese patent announcement number CN219202867U proposes a 10kV overhead conductor insulating sleeve, which can avoid manual winding of insulating tape by sleeve-connecting the sleeve body to the conductor, simplifying the conductor insulation operation and improving work efficiency.

[0004] However, during the use of this type of 10kV overhead conductor insulation sleeve, due to the presence of gaps on the sleeve surface, it is easy for water to drip between the sleeve and the cable after the sleeve is fixed on the cable, thereby affecting the insulation protection effect of the cable. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] The utility model provides an overhead conductor insulating sleeve for a high-voltage transmission line, which solves the problem that, due to gaps on the sleeve surface, water is easily dripped into the space between the sleeve and the cable after the sleeve is fixed on the cable, thereby affecting the insulation protection effect of the cable.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an insulating sleeve for overhead wires for high-voltage transmission lines, comprising a plurality of sleeve sections sleeved on the outside of the cable, characterized in that it also comprises a plurality of sets of fixing parts, wherein the fixing parts are clamped at the joints between two adjacent sleeve sections so that the fixing parts fix the position of the sleeve.

[0009] Wherein, the pipe sleeve includes a sleeve section, which is set as a soft modified polyethylene tube, and the top of the outer wall of the sleeve section is formed with an opening and closing center seam with a length equal to the length of the sleeve section, and the opposite sides of the opening and closing center seam are provided with extension sections fixedly connected to the sleeve section, and the opposite sides of the two groups of extension sections are formed with mutually symmetrical first auxiliary sealing sections.

[0010] Wherein, the fixing part includes a hanger, a double-threaded rod, two groups of movable rings, two groups of pressing plates and two groups of second auxiliary sealing segments. The double-threaded rod is rotatably arranged on the inner side of the hanger, and one end of the double-threaded rod passes through the outer side of the hanger. The two groups of movable rings are threadedly connected to the hanger, and the bottom of each group of movable rings is fixedly connected to a group of pressing plates. The two groups of the second auxiliary sealing segments are respectively formed on the inner sides of the two groups of pressing plates and cooperate with the first auxiliary sealing segments. The middle part of the hanger is fixedly connected to a limiting plate, and the bottom of the limiting plate is in contact with the top of the pressing plate.

[0011] Preferably, the first auxiliary sealing segment and the second auxiliary sealing segment each have a plurality of parallel and spaced-apart plates, and each group of plates of the second auxiliary sealing segment is inserted into a gap between adjacent plates of the first auxiliary sealing segment.

[0012] In a further preferred embodiment, a sealant is evenly coated on the top of the opening and closing center seam along its length direction.

[0013] In a further embodiment, the double-threaded rod comprises two sections of threaded rod, the two sections of threaded rod are coaxially fixed, and the threads of the two sections of threaded rod have opposite directions of rotation.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides an overhead conductor insulating sleeve for a high-voltage transmission line, which has the following beneficial effects:

[0016] In the utility model, by cooperating with the pipe sleeve and the fixing part, the pipe sleeve can be conveniently fixed on the outside of the cable to cover and protect it, and can also reduce the dripping of water from the opening and closing middle seam into the gap between the pipe sleeve and the cable, thereby improving the protective effect of the pipe sleeve on the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The overall structure schematic diagram of an overhead conductor insulating bushing for a high-voltage transmission line according to the implementation scheme;

[0018] Figure 2 is a schematic structural diagram of a pipe sleeve according to an embodiment;

[0019] Figure 3 is a schematic structural diagram of a fixing member according to an embodiment of the present invention;

[0020] Figure 4 It is a cross-sectional view of the insulating sleeve for overhead wires of high-voltage transmission lines according to the implementation scheme when it is used in conjunction with a cable.

[0021] In the figure: 10, pipe sleeve; 11, sleeve section; 12, opening and closing center seam; 13, extension section; 14, first auxiliary sealing section; 20, fixing piece; 21, hanger; 22, double threaded rod; 23, movable ring; 24, pressing plate; 25, second auxiliary sealing section; 30, cable. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 and Figure 4 An insulating sleeve for an overhead conductor of a high-voltage transmission line includes a multi-section sleeve 10 sleeved on the outside of a cable 30 and a fixing member 20 for clamping and fixing the sleeve 10. The fixing member 20 is clamped and arranged at the joint between two adjacent sections of the sleeve 10 so that the fixing member 20 fixes the position of the sleeve 10.

[0024] See also Figure 2 The sleeve 10 includes a sleeve section 11, two groups of extension sections 13 and two groups of first auxiliary sealing sections 14. The sleeve section 11 can be made of a modified polyethylene material to form a soft tubular structure, and a middle opening and closing seam 12 with a length equal to that of the sleeve section 11 is cut out at the top of the outer wall of the sleeve section 11, so that the sleeve section 11 can be pushed and sleeved on the outside of the cable 30. The two groups of extension sections 13 are fixedly connected to the outer wall of the sleeve section 11 and are located on opposite sides of the middle opening and closing seam 12, and mutually symmetrical first auxiliary sealing sections 14 are formed on the opposite sides of the extension sections 13. The first auxiliary sealing section 14 has a plurality of parallel and spaced plate bodies, and cooperates with the second auxiliary sealing section 25 in the fixing member 20 to prevent water from dripping into the gap between the sleeve section 11 and the cable 30.

[0025] See also Figure 3The fixing member 20 includes a hanger 21, a double-threaded rod 22, two sets of movable rings 23, two sets of pressing plates 24 and two sets of second auxiliary sealing segments 25. The double-threaded rod 22 is rotatably arranged on the inner side of the hanger 21, and one end of the double-threaded rod 22 passes through the outer side of the hanger 21. The double-threaded rod 22 includes two sections of threaded rods, which are coaxially fixed, and the threads of the two sections of threaded rods are rotated in opposite directions, so that after the two sets of movable rings 23 are respectively threadedly connected to the two sections of threaded rods of the hanger 21, when the double-threaded rod 22 is rotated, the movable rings 23 can have different screw-in directions. A set of pressing plates 24 are fixedly connected to the bottom of each set of movable rings 23, and the two sets of second auxiliary sealing segments 25 are respectively formed on the inner sides of the two sets of pressing plates 24 and cooperate with the first auxiliary sealing segment 14. The second auxiliary sealing section 25 has a plurality of parallel and spaced plate bodies, and each set of plate bodies of the second auxiliary sealing section 25 is inserted into the gap between the adjacent first auxiliary sealing section 14 plates, so that a labyrinth seal can be formed between the second auxiliary sealing section 25 and the first auxiliary sealing section 14, which is used to prevent water from dripping from the joint between the two sets of pressing plates 24 into the gap between the sleeve section 11 and the cable 30. A limiting plate is fixedly connected to the middle of the hanger 21, and the bottom of the limiting plate contacts the top of the pressing plate 24, so that when the double-threaded rod 22 is rotated, the pressing plate 24 moves axially along the double-threaded rod 22 with the movable ring 23 under the limiting of the two sets of pressing plates 24 by the limiting plate, and the two move toward each other until the extension section 13 is pressed.

[0026] After the extension section 13 is pressed by the pressing plate 24, the opening and closing middle seam 12 can be in a state of smaller width. At this time, the user can also evenly apply sealant on the top of the opening and closing middle seam along its length direction to help improve the sealing performance.

[0027] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut connection, bolt or screw connection, bonding or other well-known connection methods, which are not listed here one by one. In the above, all fixed connections are preferably considered to be bonding. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. An overhead conductor insulating sleeve for a high-voltage transmission line, comprising a plurality of sleeve sections (10) sleeved outside a cable (30), characterized in that: It also includes a plurality of sets of fixing members (20), wherein the fixing members (20) are clamped and arranged at the joints between two adjacent sections of the pipe sleeves (10), so that the fixing members (20) fix the position of the pipe sleeves (10). The pipe sleeve (10) comprises a sleeve section (11), the top of the outer wall of the sleeve section (11) is formed with an opening and closing middle seam (12) of the same length as the sleeve section (11), the two opposite sides of the opening and closing middle seam (12) are provided with extension sections (13) fixedly connected to the sleeve section (11), and the opposite sides of the two groups of extension sections (13) are formed with mutually symmetrical first auxiliary sealing sections (14); The fixing member (20) comprises a hanger (21), a double-threaded rod (22), two groups of movable rings (23), two groups of pressing plates (24) and two groups of second auxiliary sealing sections (25); the double-threaded rod (22) is rotatably arranged on the inner side of the hanger (21), and one end of the double-threaded rod (22) passes through the outer side of the hanger (21); the two groups of movable rings (23) are both threadedly connected to the hanger (21); the bottom of each group of movable rings (23) is fixedly connected to a group of pressing plates (24); the two groups of the second auxiliary sealing sections (25) are respectively formed on the inner sides of the two groups of pressing plates (24) and cooperate with the first auxiliary sealing sections (14).

2. The insulating bushing for overhead wires of high-voltage power transmission lines according to claim 1, characterized in that: The middle part of the hanger (21) is fixedly connected to a limit plate, and the bottom of the limit plate is in contact with the top of the pressing plate (24).

3. The insulating bushing for overhead wires of high-voltage power transmission lines according to claim 2, characterized in that: The first auxiliary sealing section (14) and the second auxiliary sealing section (25) both have a plurality of parallel and spaced-apart plate bodies, and each group of plate bodies of the second auxiliary sealing section (25) is inserted into the gap between the plates of the adjacent first auxiliary sealing section (14).

4. The insulating bushing for overhead wires of high-voltage power transmission lines according to claim 3, characterized in that: The top of the opening and closing center seam (12) is evenly coated with sealant along its length direction.

5. An insulating bushing for overhead wires of high voltage transmission lines according to any one of claims 1 to 4, characterized in that: The double-threaded rod (22) comprises two sections of threaded rod, the two sections of threaded rod are coaxially fixed, and the threads of the two sections of threaded rod have opposite rotation directions.

6. The insulating bushing for overhead wires of high-voltage power transmission lines according to claim 1, characterized in that: The sleeve section (11) is configured as a soft modified polyethylene pipe.

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