External damage prevention hard insulation protective cover for 35kV cross arm insulator cross arm

Abstract

The invention discloses an external damage prevention hard insulation protective cover for a 35kV cross arm insulator cross arm, which comprises an insulator installation metal head shielding cover and a baffle plate assembly, and is characterized in that the insulator installation metal head shielding cover comprises an n-shaped cross arm shield, an n-shaped metal head shielding cover, a metal head fixing screw rod shielding cover and an n-shaped insulator umbrella skirt shielding cover; the baffle assembly is erected on the top of the insulator installation metal head shielding cover. According to the invention, insulation protection can be carried out on the exposed metal part of the iron cross arm at the installation position of the cross insulator, and a snake climbing and crossing prevention structure and a bird nest building prevention structure are added.

Description

Technical Field

[0001] The invention relates to a hard insulating protective cover for preventing external damage and used in the field of insulation protection of overhead lines and for the cross arm of a 35kV cross-over insulator. Background Art

[0002] At present, the main cause of the tripping failure of the distribution network overhead line is external damage factors, among which bird nesting (tree branches) and small animals climbing (rats, snakes) account for a large proportion. The overhead wires on the 35kV overhead distribution line are basically bare wires, and the insulator position between them and the iron cross arm of the pole is a relatively weak link in the insulation level of the line.

[0003] A special soft silicone rubber insulating cover has been developed for installation at the cross arm of the 35kV cross-arm insulator to improve the insulation protection level, and has been applied and verified for several years. However, the installation requirement of power outage and the reality that it cannot prevent birds from nesting on it have failed to completely solve the hidden danger of external damage at this location.

[0004] Various bird-proofing devices are installed on the iron crossarms of the cross insulators, and snake-proofing devices are added on the pole paths, and some effects have been achieved. However, with the increase in years of operation, the effectiveness of various bird-repellent devices has declined or even failed. For example, windmill-type bird repellents will become stuck as their service life increases, and their rotation will slow down or even stop; sound and light bird repellents will fail due to solar cells.

[0005] At the same time, animals will also develop adaptive and countermeasures, causing some bird-proof and snake-proof devices to lose their effectiveness, and bird nests are frequently built on overhead lines that have been equipped with bird-repellent devices. After the bird-repellent fails, the few branches that initially built the bird nests can cause the line to trip, increasing the risk of power grid operation. As birds build nests at the 35kV crossarms, they also attract snakes to climb to the crossarms of the poles in various ways to forage. When passing through weak points with low insulation levels, ground short-circuit faults are likely to occur. In particular, birds nest at locations where soft insulation protective covers have not been installed at the crossarms of 35kV cross-arms of cross-arms of cross-arms of cross-arms of cross-arms of cross-arms of cross-arms of cross-arms of cross-arms of cross-arms of cross-arms of cross-arms of cross-arms of cross-arms of cross-arms of cross-arms of cross-arms of cross-arms. The existing bird-repellent measures can no longer play a bird-repellent protective effect at this location after the bird nests are manually removed. At this time, an insulation protection device at the crossarm of cross-arms of cross-arms of cross-arms that can be installed without power outages and an insulation protection baffle device for preventing branch overlap of iron cross-arms are urgently needed to play an insulation shielding and isolation role, provide buffer time for human defense patrols, and provide certain help for line tripping voltage drop. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a hard insulating protective cover for preventing external damage at the cross arm of a 35kV cross-arm insulator, to insulate and protect the exposed metal part of the iron cross arm at the installation location of the cross-arm insulator, to increase the anti-snake climbing and crossing structure and the anti-bird nest building structure, so as to achieve the following effects: 1. The anti-bird nest building structure increases the difficulty of building bird nests, forcing birds to give up nesting on the poles, thereby reducing the chance of snakes climbing poles; 2. The anti-snake climbing and crossing structure can be erected to isolate between electrical equipment and the cross arm to prevent line tripping before the initial bird nesting is discovered, thereby ensuring the safety of the power grid and reducing the risk of relative overlapping of the snake body; 3. The protective cover can be installed without power outages on the line, thereby increasing the applicability of the equipment.

[0007] A technical solution to achieve the above purpose is: a hard insulation protective cover for preventing external damage at the cross arm of a 35kV cross-over insulator, including an insulator mounting metal head shielding cover and a baffle assembly:

[0008] The insulator mounting metal head shielding cover comprises an n-shaped cross arm shield, an n-shaped metal head shielding cover, a metal head fixing screw shielding cover and an n-shaped insulator umbrella skirt shielding cover; the baffle assembly is mounted on the top of the insulator mounting metal head shielding cover.

[0009] Further, the n-shaped cross arm shield is used for the installation of the iron cross arm of the 35kV cross insulator for the insulation shielding part, with the opening horizontally downward and the top of one side bulging upward;

[0010] The n-shaped metal head shielding cover is used to insulate and shield the installation metal head of the 35kV cross-arm insulator, and is connected to the inner side of the upward raised part of the n-shaped cross-arm shield;

[0011] The metal head fixing screw shielding cover is used to insulate and shield the fastening screws that fix the installation metal head of the 35kV cross-arm insulator on the cross arm, and is connected to the top of the raised part of the n-shaped metal head shielding cover, with the internal opening facing downward;

[0012] The n-shaped insulator shed shield is used to span and shield a round of sheds close to the installation metal head of the 35kV cross-arm insulator. The opening is horizontal and downward, and is connected to the outer side of the raised part of the n-shaped cross-arm shield.

[0013] Furthermore, a strong magnetic fixing module is provided on the top of the non-raised side of the n-shaped crossarm shield, with the internal opening facing the n-shaped crossarm shield, and the strong magnet installed inside is used to adsorb on the iron crossarm.

[0014] Furthermore, the connecting part of the N-shaped crossarm shield and the N-shaped insulator umbrella skirt shield is provided with a baffle mounting groove for installing the baffle assembly, which is composed of the N-shaped metal head shield and the metal head fixing screw shield as one side and the N-shaped insulator umbrella skirt shield as the other side to form an insertion groove.

[0015] Furthermore, the insulator installation metal head shielding cover also includes a live tool connection port, which is located on both sides of the n-shaped cross arm shield and below the n-shaped metal head shielding cover, and is used for inserting and removing the insulating operating rod tool head.

[0016] Furthermore, the baffle assembly includes an anti-spanning special-shaped baffle and an anti-lapping special-shaped baffle.

[0017] Furthermore, the anti-overlap special-shaped baffle is composed of a special-shaped baffle body, side mounting strips, ventilation holes, docking mounting holes and fixed mounting holes.

[0018] Furthermore, the special-shaped baffle body, which serves as the main body of the anti-overlap special-shaped baffle to play a barrier role, has numerous ventilation holes randomly arranged thereon, and a notch on one side edge thereof is provided to match the shape of the top of the insulator mounting metal head shielding cover.

[0019] Furthermore, the side mounting strips are located on both sides of the bottom edge of the notch side of the special-shaped baffle body; the docking mounting holes are located on the side mounting strips and are symmetrically distributed with the special-shaped baffle body as the symmetry plane; the fixed mounting holes are located on the side mounting strips and are symmetrically distributed with the special-shaped baffle body as the symmetry plane, and the anti-overlap special-shaped baffle is fixed to the top of the insulator mounting metal head shielding cover with self-tapping screws to form an anti-foreign object overlapping structure of the hard insulation protective cover at the cross arm of the 35kV cross-arm insulator.

[0020] Furthermore, the anti-spanning special-shaped baffle is composed of two anti-lapping special-shaped baffles that are horizontally flipped 180 degrees and connected together, and are fixed with fastening screws through the connecting mounting holes on the side mounting strips.

[0021] The hard insulating protective cover for preventing external damage used for the cross arm of a 35kV cross-insulator of the present invention has the following advantages:

[0022] The invention is suitable for insulation protection at the installation places of cross-arms of all such single- and double-cross-arm cross-arm insulators through professional formula of hard insulating materials, special structural molding, ingenious assembly combination, and flexible opening and closing structures.

[0023] Compared with the traditional soft silicone rubber jacket, the invention can be used as an insulator low-voltage end anti-external breakage shield installed during normal power outage maintenance, and can also be installed live through the non-power-off installation method of the ground potential on the pole.

[0024] The present invention is used to improve the level of preventing foreign matter from overlapping at the low-voltage end of the cross-arm insulator: the vertical plate structure increases the difficulty of building a bird's nest at the intersection of the cross-arms of the pole, forcing the birds to give up building nests on the poles, thereby reducing the probability of snakes climbing the poles; at the same time, the anti-snake climbing and crossing structure can block foreign matter from extending to the energized position of the high-voltage end of the insulator as much as possible, reduce line tripping before the initial bird nesting is discovered, and also reduce the relative overlapping risk of the snake body, providing a time buffer for civil air defense inspections, thereby improving the reliability of distribution network power supply.

[0025] The present invention can realize live installation operations directly on the pole without the need for an insulated boom truck, thus simplifying the operating personnel and operating tools, improving work efficiency, reducing equipment use costs, expanding the scope of non-stop operations, and directly reducing the voltage drop for distribution network overhead line fault tripping, greatly reducing line maintenance costs and fault repair costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a hard insulating protective cover for preventing external damage used at the cross arm of a 35kV cross-insulator of the present invention;

[0027] Figure 2 It is a structural schematic diagram of an insulator installation metal head shielding cover of an anti-external breakage hard insulation protective cover for a cross arm of a 35kV cross-over insulator of the present invention;

[0028] Figure 3 It is a structural schematic diagram of an anti-lapping special-shaped baffle plate for an anti-external breakage hard insulation protective cover at a cross arm of a 35kV cross-over insulator of the present invention;

[0029] Figure 4 The present invention is a schematic structural diagram of an anti-crossing special-shaped baffle for an anti-external breakage hard insulating protective cover at a cross arm of a 35kV cross-insulator. DETAILED DESCRIPTION

[0030] In order to better understand the technical solution of the present invention, the following is a detailed description through specific embodiments:

[0031] The present invention is a hard insulating protective cover for preventing external damage at the cross arm of a 35kV cross-cantilever insulator which can be installed live at ground potential on an electric pole, hereinafter referred to as the hard insulating protective cover at the cross arm of a 35kV cross-cantilever insulator. It is formed and spliced ​​together using specially formulated hard insulating materials, and is provided with a live installation tool connection interface. The molding material formula is modified by adding additives such as anti-weathering, anti-ultraviolet aging, and flame retardant, and has the characteristic of not melting and supporting combustion after arc erosion.

[0032] See also Figure 1The invention discloses a hard insulating protective cover for preventing external damage used at the cross arm of a 35kV cross-over insulator, which is composed of an insulator mounting metal head shielding cover 1, an anti-crossing special-shaped baffle 2 and an anti-lapping special-shaped baffle 3.

[0033] See also Figure 2 The insulator installation metal head shielding cover 1 is composed of an n-shaped cross arm shield 11, a strong magnetic fixing module 12, an n-shaped metal head shielding cover 13, a metal head fixing screw shielding cover 14, an n-shaped insulator shed shielding cover 15, a baffle installation groove 16 and two live tool connection ports 17.

[0034] The n-shaped cross arm shield 11 is used for the installation of the iron cross arm of the insulating shielding part of the 35kV cross insulator. Its opening is horizontally downward, and the top of one side is raised upward.

[0035] The strong magnetic fixing module 12 has a fixing installation hole on the top, is insulated as a whole on the outside, and has an internal opening facing downward to the n-shaped crossarm shield 11. The strong magnet installed inside can be adsorbed on the iron crossarm to fix the insulating protective cover on the crossarm.

[0036] The n-shaped metal head shielding cover 13 is used for insulating and shielding the mounting metal head of the 35kV cross arm insulator and is connected to the inner side surface of the upwardly raised portion of the n-shaped cross arm shield 11 .

[0037] The metal head fixing screw shielding cover 14 is used to insulate and shield the fastening screws that fix the installation metal head of the 35kV cross-arm insulator to the cross arm, and is connected to the top of the raised part of the n-shaped metal head shielding cover 13, with the internal opening facing downward.

[0038] The n-shaped insulator shed shielding cover 15 is used to span and shield a round of sheds of the 35kV cross-arm insulator close to the installation metal head. The opening is horizontal and downward, and is connected to the outer side surface of the raised part of the n-shaped cross-arm shield 11.

[0039] The baffle mounting groove 16 is located at the connection part of the n-shaped cross arm shield 11 and the n-shaped insulator umbrella skirt shielding cover 15, with the n-shaped metal head shielding cover 13 and the metal head fixing screw shielding cover 14 as one side and the n-shaped insulator umbrella skirt shielding cover 15 as the other side, forming an insertion groove for inserting and fixing the anti-crossing special-shaped baffle 2.

[0040] The live tool connection port 17 is located on both sides of the N-shaped cross arm shield 11 and below the N-shaped metal head shielding cover 13, and is used for inserting and removing the insulating operating rod tool head.

[0041] See also Figure 3 The special-shaped baffle body 31 is the main body of the anti-overlap special-shaped baffle 3 to play a blocking role, and a plurality of ventilation holes 33 are randomly arranged on it. The ventilation holes can reduce wind resistance and prevent the baffle and the protective cover from being blown away from the installation position by strong wind.

[0042] The side mounting strips 32 are on both sides of the special-shaped baffle body 31. The docking mounting holes 34 are symmetrically distributed on the side mounting strips 32 with the special-shaped baffle body 31 as the symmetry plane, so as to be spliced ​​with each other to form the anti-crossing special-shaped baffle 2.

[0043] The fixed mounting holes 35 are four mounting through holes arranged on the side mounting strip 32, which are symmetrically distributed in pairs with the special-shaped baffle body 31 as the symmetry plane. The anti-overlap special-shaped baffle 3 is fixed to the top of the insulator mounting metal head shielding cover 1 by self-tapping screws, and matched with the fixed mounting holes on the top of the strong magnetic fixing module 12, to form an anti-foreign object overlapping structure of the hard insulating protective cover at the cross arm of the 35kV cross-arm insulator.

[0044] See also Figure 4 The anti-crossing special-shaped baffle 2 is composed of two anti-lapping special-shaped baffles 3 that are horizontally turned 180 degrees and butted together, and fixed with fastening screws through the butt mounting holes 34 on the side mounting strips 32. The anti-crossing special-shaped baffle 2 composed of two anti-lapping special-shaped baffles 3 is inserted and fixed in the baffle mounting groove 16 of the insulator mounting metal head shielding cover 1, as a foreign body crossing and overlapping structure of the hard insulation protective cover at the cross arm of the 35kV cross-insulator.

[0045] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A hard insulating protective cover for preventing external damage at the cross arm of a 35kV cross-over insulator, comprising an insulator mounting metal head shielding cover (1) and a baffle assembly, characterized in that: The insulator mounting metal head shielding cover (1) comprises an n-shaped cross arm shield (11), an n-shaped metal head shielding cover (13), a metal head fixing screw shielding cover (14) and an n-shaped insulator umbrella skirt shielding cover (15); the baffle assembly is mounted on the top of the insulator mounting metal head shielding cover (1).

2. The hard insulating protective cover for preventing external damage for the cross arm of a 35kV cross-insulator according to claim 1 is characterized in that: n-shaped cross arm shield (11), used for insulating and shielding the iron cross arm of the 35kV cross insulator, with the opening facing downward horizontally and the top of one side bulging upward; An n-shaped metal head shielding cover (13) is used for insulating and shielding the mounting metal head of the 35kV cross-arm insulator and is connected to the inner side surface of the upwardly protruding portion of the n-shaped cross-arm shield (11); A metal head fixing screw shielding cover (14) is used for insulating and shielding the fastening screws that fix the installation metal head of the 35kV cross-arm insulator to the cross arm, and is connected to the top of the raised part of the n-shaped metal head shielding cover (13), with the internal opening facing downward; The n-shaped insulator shed shielding cover (15) is used to span and shield a round of sheds close to the installation metal head of the 35kV cross-arm insulator, with an opening horizontally downward and connected to the outer side surface of the raised part of the n-shaped cross arm shield (11).

3. The hard insulating protective cover for preventing external damage for the cross arm of a 35kV cross-insulator according to claim 2 is characterized in that: A strong magnetic fixing module (12) is provided at the top of the non-raised side of the n-shaped cross arm shield (11), with the internal opening facing the n-shaped cross arm shield (11), and the strong magnet installed inside is used to be adsorbed on the iron cross arm.

4. The hard insulating protective cover for preventing external damage for the cross arm of a 35kV cross-insulator according to claim 2 is characterized in that: A baffle mounting groove (16) for mounting a baffle assembly is provided at a connection portion between an n-shaped cross arm shield (11) and an n-shaped insulator shed shield (15), wherein an insertion groove is formed by an n-shaped metal head shield (13) and a metal head fixing screw shield (14) as one side and an n-shaped insulator shed shield (15) as the other side.

5. The hard insulating protective cover for preventing external damage used for the cross arm of a 35kV cross-insulator according to claim 1 is characterized in that: The insulator installation metal head shielding cover (1) also includes a live tool connection port (17) which is located on both sides of the N-shaped cross arm shield (11) and below the N-shaped metal head shielding cover (13) and is used for inserting and removing the insulating operating rod tool head.

6. The anti-external damage hard insulation protective cover for the cross arm of a 35kV cross-insulator according to claim 1 is characterized in that: The baffle assembly comprises an anti-spanning special-shaped baffle (2) and an anti-lapping special-shaped baffle (3).

7. The hard insulating protective cover for preventing external damage used for the cross arm of a 35kV cross-insulator according to claim 6, characterized in that: The anti-overlapping special-shaped baffle (3) is composed of a special-shaped baffle body (31), a side mounting strip (32), a ventilation hole (33), a docking mounting hole (34) and a fixed mounting hole (35).

8. The hard insulating protective cover for preventing external damage used for the cross arm of a 35kV cross-insulator according to claim 7, characterized in that: The special-shaped baffle body (31) serves as the main body of the anti-overlap special-shaped baffle (3) to play a barrier role. A plurality of ventilation holes (33) are randomly arranged on the baffle body, and a notch matching the top shape of the insulator mounting metal head shielding cover (1) is provided on one side edge thereof.

9. The hard insulating protective cover for preventing external damage used for the cross arm of a 35kV cross-insulator according to claim 8, characterized in that: The side mounting strips (32) are located on both sides of the bottom edge of the notch side of the special-shaped baffle body (31); the docking mounting holes (34) are located on the side mounting strips (32) and are symmetrically distributed with the special-shaped baffle body (31) as a symmetry plane; the fixing mounting holes (35) are located on the side mounting strips (32) and are symmetrically distributed with the special-shaped baffle body (31) as a symmetry plane, and the anti-overlapping special-shaped baffle (3) is fixed to the top of the insulator mounting metal head shielding cover (1) by self-tapping screws, so as to form an anti-foreign matter overlapping structure of the hard insulation protective cover at the cross arm of the 35kV cross-cantilever insulator.

10. The hard insulating protective cover for preventing external damage used for the cross arm of a 35kV cross-insulator according to claim 9, characterized in that: The anti-crossing special-shaped baffle plate (2) is composed of two anti-lapping special-shaped baffle plates (3) that are horizontally turned 180 degrees and butted together, and are fixed by fastening screws through butt mounting holes (34) on the side mounting strips (32).

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