External damage prevention hard insulation protective cover for high-voltage end of 35kV cross insulator

Abstract

The invention discloses an external damage prevention hard insulation protective cover for a 35kV cross insulator high-voltage end, which is composed of an insulator high-voltage end shielding cover, two rotating column fixing modules and a rotating door closing wrapping cover, and is characterized in that the insulator high-voltage end shielding cover is composed of an n-shaped umbrella skirt shielding cover, an n-shaped metal head protection cover and a bare conductor protection cover; the rotating column fixing module is arranged at the top of the insulator high-voltage end shielding cover and is composed of a connecting main body, a rotating connecting rod movable groove and a rotating column rotating groove; the rotary door closing wrapping cover is connected with the insulator high-voltage end shielding cover through a rotary column fixing module and is composed of a bare conductor shield sealing door, a metal head shield sealing cavity, a connection opening sealing cavity and a rotary supporting column. According to the invention, the high-voltage end of the cross insulator and the bare conductor are wrapped and shielded in an insulated manner, the insulation protection effect of an electrified part can be exerted, the lap joint risk of bird nest branches or high-altitude ribbons can be reduced to a certain extent, the whole set of device can be installed under the condition that a line is not powered off, and the applicability of the device is improved.

Description

Technical Field

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

[0002] At present, the main cause of the tripping fault 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 high-voltage end of the 35kV cross-insulator to improve the insulation protection level, and has been applied and verified for several years. However, the installation requirement of power outage installation 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] As birds build nests on the 35kV crossarms, snakes are also attracted to climb to the crossarms of the poles in various ways to forage for food. When passing through weak points with low insulation levels, ground short circuit faults are likely to occur.

[0005] Especially at the location where the 35kV cross-insulator high-voltage end has not been installed with a soft insulation protective cover during a power outage, birds have built nests, and the existing bird-repelling measures can no longer play a bird-repelling and protective effect at this location after the bird nests are manually removed. At this time, there is an urgent need for an insulation protection device at the high-voltage end of the cross-insulator that can be installed without power outages to play an insulating shielding and isolation role, provide buffer time for human defense patrols, and provide certain help for line tripping voltage drops. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a hard insulating protective cover for the high-voltage end of a 35kV cross-beam insulator to prevent external damage. The high-voltage end of the cross-beam insulator and the bare wire are insulated, wrapped and shielded, which can exert the insulation protection effect of the live parts and reduce the risk of overlapping of bird nests, branches or high-altitude streamers to a certain extent. The whole set of equipment can be installed without power outages on the line, increasing the applicability of the equipment.

[0007] A technical solution to achieve the above purpose is: a hard insulation protective cover for the high-voltage end of a 35kV horizontal insulator to prevent external damage, which consists of an insulator high-voltage end shielding cover, two rotating column fixing modules and a rotating door wrapping cover, characterized in that:

[0008] The shielding cover of the high-voltage end of the insulator is composed of an n-type shed shielding cover, an n-type metal head shielding cover and a bare conductor shielding cover;

[0009] The rotating column fixing module is arranged on the top of the shielding cover of the high-voltage end of the insulator, and is composed of a connecting body, a rotating connecting rod movable groove, and a rotating column rotating groove;

[0010] The rotary closing door wrapping cover is connected to the high-voltage end shielding cover of the insulator through a rotary column fixing module, and is composed of a bare wire shield closing door, a metal head shield closing cavity, a joint closing cavity and a rotary support.

[0011] Furthermore, the n-type shed shield is used for shielding and protecting the shed across the insulator, and the opening is horizontally downward;

[0012] The n-type metal head shield is used to shield the metal head part of the high-voltage end of the horizontal insulator. The opening is horizontal and downward. One side is connected to the n-type shed shielding cover with an embedded partition inside, and the other side is connected to the live tool connection port;

[0013] The bare wire shield 13 is used to shield the bare wire placed on the metal head of the high-voltage end of the cross-insulator. The opening is horizontally downward and symmetrically distributed in pairs on both sides of the n-type metal head shield 12.

[0014] Furthermore, the high-voltage end shielding cover of the insulator also includes fixed connecting columns, which are symmetrically distributed on the upper ends of both sides of the bare wire shield and are used to connect the connecting cylindrical caps of the rotating column fixing module; the rotating column fixing module also includes connecting cylindrical caps, which are symmetrically distributed on both sides of the movable groove of the rotating connecting rod, and are nested one by one with the fixed connecting columns, and are fastened with self-tapping screws.

[0015] Furthermore, four fixed connection columns are respectively provided at the upper end of each side of the bare wire shield.

[0016] Furthermore, the shielding cover at the high-voltage end of the insulator also includes a rotating column support block, two on one side, symmetrically distributed on the upper ends of the two sides of the bare conductor shield, located in the middle of the four fixed connecting columns, and used to support the rotating pillar of the rotating door closing cover; the rotating column rotating groove and the rotating column support block of the shielding cover at the high-voltage end of the insulator constitute a rotating movable circular cavity of the rotating pillar of the rotating door closing cover.

[0017] Furthermore, the shielding cover at the high-voltage end of the insulator also includes a live tool connection port, which is located on one side of the n-type metal head shield.

[0018] Furthermore, the insulator high-voltage end shielding cover also includes an embedded partition plate, which is embedded in the connection between the n-type umbrella skirt shielding cover and the n-type metal head shield.

[0019] Furthermore, the movable groove of the rotating connecting rod is located on one side of the connecting body; the rotating groove of the rotating column is located in the center of the connecting body, and is distributed at 90 degrees with the movable groove of the rotating connecting rod.

[0020] Furthermore, the rotating column fixing module also includes a limiting protrusion, which is located on the connecting body, on the opposite side of the rotating connecting rod movable groove, and is used for limiting the rotating pillar of the rotating door closing wrapping cover to limit the rotating pillar of the rotating door closing wrapping cover.

[0021] Furthermore, the bare wire shield enclosed doors are symmetrically distributed on both sides of the main structure of the metal head shield enclosed cavity, and together with the bare wire shield of the insulator high-voltage end shielding cover, form an insulating shielding cavity for the bare wire; the metal head shield enclosed cavity, together with the n-type metal head shield of the insulator high-voltage end shielding cover, forms an insulating shielding cavity for the metal end of the cross-insulator; the connecting port enclosed cavity is located on the inner side of the metal head shield enclosed cavity; the rotating pillars are symmetrically distributed on the metal head shield enclosed cavity.

[0022] The advantages of the present invention are:

[0023] The invention is a hard insulating protective cover that can be installed at ground potential for the high-voltage end of the cross-arm insulator. Through the professional formulation of hard insulating materials, special structural molding and ingenious assembly combination, and flexible open and closed structures, it is suitable for the insulation protection of the high-voltage end of all such single-arm and double-arm cross-arm insulators. Compared with the traditional soft silicone rubber jacket, it can be used as an anti-external breakage protective cover for the high-voltage end of the insulator installed during normal power outages and maintenance, and can also be installed at ground potential on the pole without power outages to achieve anti-external breakage insulation shielding for the exposed high-voltage end of the insulator.

[0024] The present invention is used to improve the insulation level of the high-voltage end of the cross-beam insulator to prevent foreign objects from overlapping, so as to improve the protection level against external damage of small animals or bird nests and branches, reduce the probability of relative short-circuit external damage failure, provide time buffer for civil air defense inspections, and thus improve the power supply reliability of the distribution network.

[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 rigid insulating protective cover for preventing external damage at the high-voltage end of a 35kV horizontal insulator according to the present invention;

[0027] Figure 2 It is a structural schematic diagram of an insulator high-voltage end shielding cover of a hard insulating protective cover for preventing external damage at the high-voltage end of a 35kV horizontal insulator of the present invention;

[0028] Figure 3A bottom view of an insulator high-voltage end shielding cover of a hard insulating protective cover for preventing external damage at the high-voltage end of a 35kV horizontal insulator according to the present invention;

[0029] Figure 4 It is a structural schematic diagram of a rotating column fixing module of a hard insulating protective cover for preventing external damage at the high-voltage end of a 35kV horizontal insulator according to the present invention;

[0030] Figure 5 A bottom view of a rotating column fixing module of a hard insulating protective cover for preventing external damage at the high-voltage end of a 35kV horizontal insulator according to the present invention;

[0031] Figure 6 It is a structural schematic diagram of a rotary door-closing wrapping cover of a hard insulating protective cover for preventing external damage at the high-voltage end of a 35kV horizontal insulator according to the present invention;

[0032] Figure 7 It is a schematic structural diagram of an open state of a hard insulating protective cover for preventing external damage at the high-voltage end of a 35kV horizontal insulator according to the present invention;

[0033] Figure 8 The present invention is a schematic structural diagram of a closed state of a hard insulating protective cover for preventing external damage at the high-voltage end of a 35kV cross-insulator. DETAILED DESCRIPTION

[0034] In order to better understand the technical solution of the present invention, the following is a detailed description through specific embodiments:

[0035] The present invention is a hard insulation protective cover for the high-voltage end of a 35kV horizontal insulator that is resistant to external damage. It is formed and spliced ​​with a specially formulated hard insulation material, and is provided with a live installation tool connection interface. The molding material formula is modified by adding anti-weathering, anti-ultraviolet aging, flame retardant and other additives, and has the characteristic of not melting and supporting combustion after arc ablation. Its specific structure is as follows:

[0036] See also Figure 1 The hard insulating protective cover for preventing external damage for the high-voltage end of a 35kV horizontal insulator of the present invention is composed of an insulator high-voltage end shielding cover 1, two rotating column fixing modules 2 and a rotating door wrapping cover 3.

[0037] See also Figure 2 and Figure 3 The insulator high-voltage end shielding cover 1 is composed of an n-type shed shielding cover 11, an n-type metal head shield 12, a bare wire shield 13, a fixed connection column 14, a rotating column support block 15, a live tool connection port 16 and an embedded partition 17.

[0038] The n-type shed shielding cover 11 is used for shielding and protecting the shed across the insulator, and its opening is horizontal and downward.

[0039] The n-type metal head shield 12 is used to shield the metal head part of the high-voltage end of the cross-insulator. The opening is horizontal and downward. One side is connected to the n-type umbrella skirt shielding cover 11, and there is an embedded partition 17 inside. The other side is connected to the live tool connection port 16.

[0040] The bare wire shield 13 is used to shield the bare wire placed on the metal head of the high-voltage end of the cross-insulator. The opening is horizontally downward and symmetrically distributed in pairs on both sides of the n-type metal head shield 12.

[0041] There are four fixed connecting columns 14 on one side, which are symmetrically distributed on the upper ends of both sides of the bare wire shield 13 and are used to connect the connecting cylindrical cap 24 of the rotating column fixing module 2.

[0042] The rotating column support blocks 15, two on one side, are symmetrically distributed on the upper ends of the bare wire shield 13 on both sides, located in the middle of the four column fixed connection columns 14, and are used to support the rotating support pillars 34 of the rotating door closing package cover 3.

[0043] The live tool interface 16 is located on one side of the n-type metal head shield 12 and is used for inserting and removing the insulating operating rod tool head.

[0044] The embedded partition 17 is embedded in the connection between the n-type shed shielding cover 11 and the n-type metal head shielding cover 12, and is used to improve the insulation isolation level between the insulator shed and the metal head.

[0045] See also Figure 4 and Figure 5 The rotating column fixing module 2 is composed of a connecting body 21 , a rotating connecting rod movable groove 22 , a rotating column rotating groove 23 , four connecting cylindrical caps 24 and a limiting protrusion 25 .

[0046] The rotating connecting rod movable groove 22 is located on one side of the connecting body 21 .

[0047] The limiting protrusion 25 is located on the top of the other side of the connecting body 21 and is used for limiting protection of the rotating support 34 of the rotating door closing package cover 3.

[0048] The rotating column rotating groove 23 is located in the center of the connecting body 21 and is distributed at 90 degrees with the rotating connecting rod movable groove 22 .

[0049] The connecting cylindrical caps 24 are symmetrically distributed in pairs on both sides of the rotating connecting rod movable groove 22 .

[0050] The rotating column rotating groove 23 and the rotating column support block 15 of the insulator high-voltage end shielding cover 1 form a rotating movable circular cavity for the rotating support column 34 of the rotating door closing cover 3.

[0051] The connecting cylindrical cap 24 is nested in a one-to-one correspondence with the fixed connecting column 14 of the insulator high-voltage end shielding cover 1, and is fastened and fixed with self-tapping screws.

[0052] The limiting protrusion 25 serves to limit the rotation support 34 of the rotating door closing cover 3.

[0053] See also Figure 6 The rotary door-closing enclosure 3 is composed of a bare wire shield closing door 31 , a metal head shield closing cavity 32 , a connection closing cavity 33 and a rotary support 34 .

[0054] The bare wire shield closed doors 31 are symmetrically distributed on both sides of the main structure of the metal head shield closed cavity 32, and together with the bare wire shield 13 of the insulator high-voltage end shielding cover 1 form an insulating shielding cavity for the bare wire.

[0055] The metal head shield closed cavity 32 and the n-type metal head shield 12 of the insulator high voltage end shielding cover 1 together form an insulating shielding cavity for the metal end of the horizontal insulator.

[0056] The joint closed cavity 33 is located on one side of the inner side of the metal head shield closed cavity 32 .

[0057] The rotating pillars 34 are symmetrically distributed on the metal head shield closed cavity 32.

[0058] See also Figure 7 and Figure 8 The present invention adopts a remote operating rod, which can directly realize live installation and operation without the need for an insulating boom truck. When opening and closing the insulating cover, it is only necessary to insert the insulating operating rod tool head into the live tool connection port to realize the opening and closing of the hard insulating protective cover. It can be opened during maintenance work and closed during daily maintenance, so as to realize the insulation and shielding of the high-voltage end of the cross-beam insulator and the bare wire.

[0059] 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 high-voltage end of a 35kV horizontal insulator, comprising a shielding cover (1) for the high-voltage end of an insulator, two rotating column fixing modules (2) and a rotating door wrapping cover (3), characterized in that: The insulator high-voltage end shielding cover (1) is composed of an n-type shed shielding cover (11), an n-type metal head shielding cover (12) and a bare wire shielding cover (13); The rotating column fixing module (2) is arranged on the top of the insulator high voltage end shielding cover (1), and is composed of a connecting body (21), a rotating connecting rod movable groove (22), and a rotating column rotating groove (23); The rotary door-closing wrapping cover (3) is connected to the insulator high-voltage end shielding cover (1) through a rotary column fixing module (2), and is composed of a bare wire shield closing door (31), a metal head shield closing cavity (32), a joint closing cavity (33) and a rotary support column (34).

2. The hard insulating protective cover for preventing external damage of the high-voltage end of a 35kV horizontal insulator according to claim 1 is characterized in that: The n-type shed shielding cover (11) is used for shielding and protecting the shed across the insulator, and its opening is horizontal and downward; The n-type metal head shield (12) is used to shield the metal head part of the high-voltage end of the horizontal insulator, with an opening facing downward horizontally and one side connected to the n-type shed shielding cover (11); The bare conductor shield (13) is used to shield the bare conductor placed on the metal head of the high-voltage end of the cross-bracing insulator, and has an opening facing downward horizontally and symmetrically distributed in pairs on both sides of the n-type metal head shield (12).

3. The hard insulating protective cover for preventing external damage of the high-voltage end of a 35kV horizontal insulator according to claim 1 is characterized in that: The insulator high-voltage end shielding cover (1) also includes fixed connecting columns (14) symmetrically distributed on the upper ends of both sides of the bare wire shield (13) and used to connect with the connecting cylindrical caps (24) of the rotating column fixing module (2); the rotating column fixing module (2) also includes connecting cylindrical caps (24) symmetrically distributed on both sides of the rotating connecting rod movable groove (22), nested in a one-to-one correspondence with the fixed connecting columns (14), and fastened and fixed with self-tapping screws.

4. The hard insulating protective cover for preventing external damage of the high-voltage end of a 35kV horizontal insulator according to claim 3 is characterized in that: Four fixed connection columns (14) are respectively arranged at the upper end of each side of the bare wire shield (13).

5. The hard insulating protective cover for preventing external damage of the high-voltage end of a 35kV horizontal insulator according to claim 4 is characterized in that: The insulator high-voltage end shielding cover (1) also includes a rotating column support block (15), two of which are symmetrically distributed on the upper ends of both sides of the bare wire shield (13) and located in the middle of the four fixed connection columns (14) for supporting the rotating pillar (34) of the rotating door closing cover (3); the rotating column rotating groove (23) and the rotating column support block (15) of the insulator high-voltage end shielding cover (1) form a rotating movable circular cavity of the rotating pillar (34) of the rotating door closing cover (3).

6. The hard insulating protective cover for preventing external damage of the high-voltage end of a 35kV horizontal insulator according to claim 1 is characterized in that: The insulator high-voltage end shielding cover (1) also includes a live tool connection port (16) located on one side of the n-type metal head shield (12).

7. The hard insulating protective cover for preventing external damage of the high-voltage end of a 35kV horizontal insulator according to claim 1 is characterized in that: The insulator high-voltage end shielding cover (1) also includes an embedded partition plate (17) embedded in the connection between the n-type umbrella skirt shielding cover (11) and the n-type metal head shield (12).

8. The hard insulating protective cover for preventing external damage of the high-voltage end of a 35kV horizontal insulator according to claim 1 is characterized in that: The rotating connecting rod movable groove (22) is located at one side of the connecting body (21); the rotating column rotating groove (23) is located at the center of the connecting body (21) and is distributed at 90 degrees with the rotating connecting rod movable groove (22).

9. The hard insulating protective cover for preventing external damage of the high-voltage end of a 35kV horizontal insulator according to claim 1 is characterized in that: The rotating column fixing module (2) also includes a limiting protrusion (25), which is located on the connecting body (21) on the opposite side of the rotating connecting rod movable groove (22) and is used for limiting protection of the rotating support (34) of the rotating door closing cover (3), thereby limiting the rotating support (34) of the rotating door closing cover (3).

10. The hard insulating protective cover for preventing external damage of the high-voltage end of a 35kV horizontal insulator according to claim 1 is characterized in that: The bare wire shield closed doors (31) are symmetrically distributed on both sides of the main structure of the metal head shield closed cavity (32), and together with the bare wire shield (13) of the insulator high-voltage end shielding cover (1) form an insulating shielding cavity for the bare wire; The metal head shield closed cavity (32) and the n-type metal head shield (12) of the insulator high-voltage end shielding cover (1) together form an insulating shielding cavity for the metal end of the horizontal insulator; the joint closed cavity (33) is located on the inner side of the metal head shield closed cavity (32); and the rotating pillars (34) are symmetrically distributed on the metal head shield closed cavity (32).

Images