A composite lightning arrester protective cover and insulating clamp capable of live working

Abstract

The present invention discloses a composite lightning arrester protective cover capable of live working and can be installed live; it includes a protective cover main body and a protective cylinder for wrapping the cable of the composite lightning arrester; the protective cover main body is provided with a cavity with an opening facing downward and can be sleeved into the composite lightning arrester; the protective cylinder is horizontally fixed on the right side of the protective cover main body; a first slit is respectively provided at the top and bottom of the protective cylinder along the axial direction, and a third slit with the slit opening becoming larger from right to left is provided, and a second slit coplanar with the first slit is provided at the top of the protective cover main body; a fourth slit connected to the third slit is provided on the right side of the bottom of the protective cover main body. An insulating fixture is also provided, which includes a clamping part and a fixing part detachably connected to an insulating rod; the clamping part is provided with two semicircular clamping grooves suitable for the insertion of the protective cylinder; the clamping part is provided with a third through hole located between the two clamping grooves and suitable for the passage of the cable; a cable opening suitable for the cable to move to the third through hole is provided at the bottom side of the clamping part; the fixing part is arranged on the left side of the clamping part and is fixedly connected to the clamping part.

Description

Technical Field

[0001] The present invention belongs to the technical field of insulation protection for power equipment, and particularly relates to a composite lightning arrester protective cover and an insulating fixture that can perform live working. Background Art

[0002] Metal oxide lightning arresters, also known as metal zinc oxide lightning arresters, are new types of lightning arresters that emerged in the early 1970s. So far, they have been widely used in China's power grid. Metal oxide lightning arresters (MOA) are important protective electrical appliances used to provide insulation protection for power transmission and transformation equipment against overvoltage hazards. They have the advantages of fast response, flat volt-ampere characteristics, stable performance, large current-carrying capacity, low residual voltage, long service life, and simple structure, and are widely used in power generation, power transmission, power transformation, power distribution and other systems. Composite jacket metal oxide lightning arresters use silicone rubber composite materials as jackets, and compared with traditional porcelain jacket lightning arresters, they have the advantages of small size, light weight, strong structure, good pollution resistance, and good explosion-proof performance.

[0003] To prevent mice and other small animals from climbing onto the metal part of the lightning arrester and causing an accidental short circuit to the ground, resulting in a line fault, a rubber material protective cover is used in the market to wrap and protect the lightning arrester. However, this protective cover has a short service life, cannot perform inspection and temperature measurement operations, has a high operation cost (i.e., requires power outage operation), and at the same time, its own material is opaque, which poses a certain obstacle to the inspection and maintenance operations of maintenance personnel.

[0004] It can be seen that the existing technology still needs to be improved. Summary of the Invention

[0005] In view of the above deficiencies of the existing technology, one of the purposes of the present invention is to provide a composite lightning arrester protective cover that can perform live working, with a unique and novel structure, simple and convenient installation, capable of working anytime and anywhere, without the need for a lifting platform, supplementary power supply, and large live working vehicles, and can be installed on a composite lightning arrester under live conditions.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A composite lightning arrester protective cover that can perform live working, which includes a protective cover main body and a protective cylinder for wrapping the cable of the composite lightning arrester; the protective cover main body is provided with a cavity that opens downward and can be sleeved into the composite lightning arrester; the protective cylinder is horizontally fixed on the right side of the protective cover main body; a first slit is axially opened at the top of the protective cylinder, and a second slit coplanar with the first slit is correspondingly opened at the top of the protective cover main body; a third slit with a slit opening that gradually becomes larger from right to left is axially opened at the bottom of the protective cylinder, and a fourth slit connected to the third slit is correspondingly opened on the right side of the protective cover main body.

[0008] In the described composite lightning arrester protective cover capable of live working, the protective cover body is made of transparent PC material; the protective cylinder is integrally formed with the protective cover body.

[0009] In the described composite lightning arrester protective cover capable of live working, a first through hole adapted to measure the temperature of the composite lightning arrester is provided on the outer side of the protective cover body.

[0010] In the described composite lightning arrester protective cover capable of live working, a three-phase identification member is detachably connected to the top of the protective cover body.

[0011] In the described composite lightning arrester protective cover capable of live working, an arc-shaped through hole is provided at the top of the protective cover body; a clamping block adapted to be clamped with the arc-shaped through hole is provided at the bottom of the three-phase identification member.

[0012] In the described composite lightning arrester protective cover capable of live working, a skirt extending outward and having a wavy shape and inclined downward is formed at the bottom of the protective cover body.

[0013] In addition, the second object of the present invention is to provide an insulating fixture, which is ingeniously designed and is used to cooperate with the installation of the above-mentioned composite lightning arrester protective cover, clamp the composite lightning arrester protective cover, and install it on the lightning arrester under live conditions.

[0014] In order to achieve the second object, the present invention adopts the following technical solutions:

[0015] An insulating fixture includes a clamping portion for clamping the above-mentioned composite lightning arrester protective cover capable of live working, and a fixing portion detachably connected to an insulating rod; two semicircular clamping slots adapted to insert the protective cylinder are provided on the clamping portion; a third through hole located between the two clamping slots and adapted to allow the cable of the composite lightning arrester to pass through is provided on the clamping portion; a cable opening adapted to allow the cable of the composite lightning arrester to move to the third through hole is provided on the bottom side of the clamping portion; the fixing portion is provided on the left side of the clamping portion and fixedly connected to the clamping portion.

[0016] In the described insulating fixture, support bars for clamping the protective cylinder are respectively provided on the outer sides of the clamping slots of the clamping portion.

[0017] The described insulating fixture further includes an extension rod; a first connection hole adapted to insert the extension rod is provided on the front side of the fixing portion; a connection portion is provided on the clamping portion, and second connection holes and third connection holes adapted to insert the extension rod correspondingly are respectively provided on the front side and the rear side of the connection portion; a locking portion adapted to fit over the insulating rod is provided on the rear side of the fixing portion.

[0018] In the described insulating clamp, the connecting part is cylindrical and has a fourth connecting hole provided on the left side of the outer peripheral surface; an arc-shaped groove matching the connecting part is provided on the right side of the fixing part; a connecting post adapted to be inserted into the fourth connecting hole is provided on the right side of the fixing part.

[0019] Advantageous effects:

[0020] The present invention provides a composite lightning arrester protective cover that can be operated live, with a unique and novel structure, simple and convenient installation, capable of operating at any time and place, without the need for a lift table, supplementary power supply, and large live operation vehicles, and can be installed on the composite lightning arrester in a live state.

[0021] In addition, the present invention also provides an insulating clamp, which is ingeniously designed and used to cooperate with the installation of the above-mentioned composite lightning arrester protective cover, clamping the composite lightning arrester protective cover and installing it on the lightning arrester in a live state. Description of the drawings

[0022] Figure 1 Is a three-dimensional structure of the composite lightning arrester protective cover that can be operated live provided by the present invention Figure 1 。

[0023] Figure 2 Is a three-dimensional structure of the composite lightning arrester protective cover that can be operated live provided by the present invention Figure 2 。

[0024] Figure 3 Is a three-dimensional structure diagram of the composite lightning arrester protective cover that can be operated live provided by the present invention in another specific embodiment.

[0025] Figure 4 Is a working principle diagram of the composite lightning arrester protective cover that can be operated live provided by the present invention.

[0026] Figure 5 Is a three-dimensional structure diagram of the three-phase identification member in the composite lightning arrester protective cover that can be operated live provided by the present invention.

[0027] Figure 6 Is a three-dimensional structure diagram of the connection between the insulating clamp and the insulating rod provided by the present invention.

[0028] Figure 7 Is a three-dimensional structure diagram of the connection between the insulating clamp, the extension rod, and the insulating rod provided by the present invention.

[0029] Figure 8 Is a three-dimensional structure of the clamping part in the insulating clamp provided by the present invention Figure 1 。

[0030] Figure 9 Is a three-dimensional structure of the clamping part in the insulating clamp provided by the present invention Figure 2 。

[0031] Figure 10 The top view of the clamping part in the insulating fixture provided by the present invention.

[0032] Figure 11 The three-dimensional structure of the fixing part in the insulating fixture provided by the present invention Figure 1 。

[0033] Figure 12 The three-dimensional structure of the fixing part in the insulating fixture provided by the present invention Figure 2 。 Detailed implementation manners

[0034] The present invention provides a composite lightning arrester protective cover and an insulating fixture capable of live working. To make the objectives, technical solutions and effects of the present invention clearer and more definite, the following further describes the present invention in detail with reference to the accompanying drawings and by way of examples. It should be understood that the specific examples described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 The present invention provides a composite lightning arrester protective cover capable of live working, which includes a protective cover main body 1 and a protective cylinder 2 for wrapping the cable of a composite lightning arrester 4; the protective cover main body 1 is provided with a cavity (not marked in the figure) with an opening facing downwards and capable of sleeving the composite lightning arrester 4; the protective cylinder 2 is horizontally fixed on the right side of the protective cover main body 1; a first slit 22 is axially opened at the top of the protective cylinder 2, and a second slit 12 coplanar with the first slit 22 is correspondingly opened at the top of the protective cover main body 1; a third slit 21 with a slit opening gradually increasing from right to left is axially opened at the bottom of the protective cylinder 2, and a fourth slit 16 connected to the third slit 21 is correspondingly opened on the right side of the protective cover main body 1.

[0036] In this embodiment, the cavity is cylindrical, and the protective cover main body is cylindrical; the slit openings of the second slit 12 and the first slit 22 are 1 mm wide. The slit opening of the fourth slit 16 remains unchanged, and the slit opening of the third slit 21 gradually increases from right to left (i.e., from the outside to the inside of the protective cylinder), so as to ensure that the cable can move upward from bottom to top into the inner cavity of the protective cylinder after the protective cylinder is pried open.

[0037] Since there is a cable with a cross-sectional area of 70 square millimeters in a composite metal oxide lightning arrester (also known as a composite lightning arrester), a protective cylinder 2 with a width of 16 mm and a length of 68 mm is provided on one side of the protective cover main body 1, which is convenient for completely wrapping the cable without affecting the use of the cable.

[0038] The protective cover body 1 is made of transparent PC material imported from abroad. The protective cylinder 2 is integrally formed with the protective cover body 1 and is injection molded by a shielding design. It is visually visible, convenient for inspection and maintenance personnel to conduct inspections, can withstand a high voltage of 38 KV, is high-temperature resistant and has a long service life.

[0039] As Figure 3 , Figure 4 shown, a first through hole 14 suitable for measuring the temperature of the composite lightning arrester 4 is provided on the outer side of the protective cover body 1. By opening holes on the front and back sides of the protective cover body respectively, it is convenient for inspection and maintenance personnel to perform line temperature measurement operations during fault troubleshooting, improving work efficiency.

[0040] As Figure 2 , Figure 3 , Figure 5 shown, a three-phase identification member 3 is detachably connected to the top of the protective cover body 1. An arc-shaped through hole 13 is provided at the top of the protective cover body 1; a clamping block 31 that is clamped with the arc-shaped through hole 13 and is integrally formed with the three-phase identification member 3 is provided at the bottom of the three-phase identification member 3.

[0041] The three-phase identification member 3 is pressed from soft rubber TPU material and has three colors: yellow, green, and red, which is convenient for maintenance staff to distinguish the tower phase lines, provide phase line information, and improve the overall work efficiency. The three-phase identification member 3 is directly inserted into the arc-shaped through holes 13 provided on the front and back sides of the protective cover body 1 through the clamping block 31 provided thereon and realizes snap connection, so that the three-phase identification member is detachably connected to the protective cover body.

[0042] In this embodiment, the arc-shaped through holes 13 are symmetrically arranged on the top of the protective cover body 1 with respect to the second slit 12.

[0043] As Figure 1 , Figure 2 , Figure 3 , Figure 4 shown, a skirt 11 that is wavy and inclined downward extends outward from the bottom of the protective cover body 1. With a wavy design, when the protective cover body 1 is buckled onto the composite lightning arrester, the skirt can ventilate and drain water in a strong wind and heavy rain environment, achieving the effects of no water accumulation and reduced internal wind pressure.

[0044] In addition, as Figure 3 shown, a second through hole 15 suitable for the cable of the composite lightning arrester 4 to pass through is provided in the middle of the top of the protective cover body 1. This structural design is to provide cable routing for a straight-type composite lightning arrester (for some composite lightning arresters, the cable routing is upward, so it is called a straight-type composite lightning arrester). At this time, an opening suitable for the cable to pass through is also provided in the middle of the three-phase identification member 3.

[0045] In addition, as Figure 2 , Figure 4 ,Figure 6 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12 As shown in

[0046] FIG.

[0047] As shown in Figure 2 , Figure 8 FIG.

[0048] As shown in Figure 7 , Figure 8 , Figure 9 , Figure 11 FIG.

[0049] As shown in Figure 8 , Figure 10 FIG.

[0050] , the present invention further provides an insulating fixture, which includes a clamping portion 5 for clamping the composite lightning arrester protective cover capable of live working as described above, and a fixing portion 6 detachably connected to an insulating rod 7; two semicircular clamping grooves 52 adapted for inserting a protective cylinder 2 are formed in the clamping portion 5; a third through hole 54 adapted for the cable of the composite lightning arrester 4 to pass through is formed between the two clamping grooves 52 in the clamping portion 5; a cable opening (not marked in the figure) adapted for the cable of the composite lightning arrester 4 to move to the third through hole 54 is formed in the bottom side of the clamping portion 5; the fixing portion 6 is arranged on the left side of the clamping portion 5 and fixedly connected to the clamping portion 5. Among them, the insulating fixture is printed and made of fiberglass material, and has the characteristics of high strength, high hardness and high withstand voltage. As shown in

[0048] As shown in Figure 7 , Figure 8 , Figure 9 , Figure 11 FIG.

[0049] As shown in Figure 8 , Figure 10 FIG.

[0050] , support bars 53 for clamping the protective cylinder 2 are respectively arranged on the outer sides of the clamping grooves 52 in the clamping portion 5. When the protective cylinder 2 is split into two parts along the first slit 22 and the third slit 21 and respectively inserted into the clamping grooves 52, the protective cylinder is clamped by the two support bars 53 to enhance the overall stability and prevent the protective cylinder from shaking and sagging. As shown in

[0049] As shown in Figure 8 , Figure 10 FIG.

[0050] , the insulating fixture further includes an extension rod 8; a first connection hole 62 adapted for inserting the extension rod 8 is formed in the front side of the fixing portion 6; a connection portion 51 is arranged on the clamping portion 5, and second connection holes 55 and third connection holes 58 adapted for respectively inserting the extension rod 8 are formed in the front side and the rear side of the connection portion 51; a locking portion 61 adapted for sleeving the insulating rod 7 is arranged on the rear side of the fixing portion 6. After the locking portion 61 is sleeved on the insulating rod 7, mounting holes (not marked in the figure) are formed at both ends of the locking portion. Insulating screws can be sequentially inserted into the mounting holes at the ends of the locking portion and tightened, so that the inner wall surface of the locking portion is tightly attached to the outer peripheral surface of the insulating rod, and the locking portion is stably fixed and will not fall down. As shown in

[0050] , in this embodiment, the clamping portion 5 is in a "C" shape and is fixedly connected to the connection portion 51 through a connecting rod, and the clamping portion, the connecting rod and the connection portion are integrally formed. Among them, the clamping grooves 52 and the support bars 53 are symmetrically arranged respectively, and an included angle is formed by the extension lines of the two support bars 53.In case of needing to extend the length for use, an extension rod can be used, and the two ends of the extension rod 8 can be respectively inserted into the first connection hole 62 and the second connection hole 55, or the first connection hole 62 and the third connection hole 58. The extension rod is matched and connected with the first connection hole, the second connection hole, and the third connection hole. Specifically, positioning holes (not shown in the figure) are respectively provided at both ends of the extension rod. After the clamping part 5 and the fixing part 6 are connected by the extension rod 8, a pin can be used to pass through the insertion hole 65 and the positioning hole of the extension rod, and the extension rod can be fixed to the fixing part by a snap-fit method. In addition, the pin can be passed through the insertion hole 56, and the extension rod can be fixed to the clamping part by a snap-fit method. According to the use requirements, one end of the extension rod can be inserted into the second connection hole 55 or the third connection hole 58.

[0051] In this embodiment, the diameter of the extension rod is 26 mm, and the inner diameters of the first connection hole 62, the second connection hole 55 and the third connection hole 58 are all 26 mm. The insertion holes 56 and 65 can be screw holes. The inner diameter of the through hole surrounded by the locking portion 61 that can be inserted into the insulating rod is 32 mm, and it is used in conjunction with the existing insulating rod with a diameter of 32 mm (which consists of a working head, an insulating rod and a handle).

[0052] like Figure 6 , Figure 8 , Figure 9 , Figure 11 As shown, the connecting portion 51 is cylindrical and has a fourth connecting hole 59 on the left side of the outer circumference; the right side of the fixing portion 6 is provided with an arc-shaped groove 63 that matches the connecting portion 51; and the right side of the fixing portion 6 is provided with a connecting column 64 that is suitable for inserting into the fourth connecting hole 59. When the extension rod is not needed, the connecting column 64 of the fixing portion 6 is correspondingly inserted into the fourth connecting hole 59 of the connecting portion 51, and the outer circumference of the cylindrical connecting portion 51 and the arc-shaped groove 63 are in contact with each other. In addition, a pin can be inserted into the insertion hole 57 provided in the connecting portion 51 and the positioning hole 66 of the connecting column 64 to achieve the connection of the connecting portion 51 to the fixing portion 6. With such an ingenious structural design, quick disassembly and assembly can be achieved, and it is stable and reliable when used.

[0053] In this embodiment, the diameter of the connecting column 64 is 12 mm, and the inner diameter of the fourth connecting hole 59 is 12 mm.

[0054] The composite lightning arrester protective cover provided by the present invention has an ingenious structural design. When in use, the protective tube 2 is opened to both sides along the first slit 22 to form a large-angle opening, and then the corresponding slot 52 of the insulating clamp is inserted. At the same time, the protective tube is clamped by two support bars 53, so that the composite lightning arrester protective cover is completely clamped and will not shake or sag.

[0055] Then, the insulating fixture is fixedly connected to the insulating rod through the locking portion 61. After wearing insulating gloves and insulating boots, the staff holds the insulating rod and sends the composite lightning arrester protective cover onto the tower. The cable on the composite metal oxide lightning arrester passes through the protective cover in the opened state, that is, when the protective cover moves downward from top to bottom, the cable enters the inner cavity of the protective cylinder from the outside, and at the same time, it also passes through the cable opening of the insulating fixture and enters the third through hole 54 of the clamping portion 5, so that when the protective cylinder is closed, the cable is wrapped by the protective cylinder; then the protective cover is gently placed above the lightning arrester and sleeved down onto the lightning arrester.

[0056] When the protective cover is completely fitted to the lightning arrester, gently pull the insulating rod outwards to separate the protective cover from the insulating fixture. Since the protective cover needs to restore its original state and close, it wraps the lightning arrester and the cable, completing the live working of isolating the protective cover, and at the same time preventing mice and other small animals from climbing onto the metal part of the lightning arrester and causing a ground short circuit, resulting in an accidental line fault.

[0057] The composite lightning arrester protective cover provided by the present invention has a service life of up to 10 years and can withstand a high temperature of 750 °C. In case of a fire accident, there is a certain phenomenon of burning and no burning with fire on the protective cover, avoiding secondary damage to the line and other equipment; at the same time, it can withstand a high-voltage strike of 38 KV and is in an absolutely insulated state for the target medium-voltage 10 KV tower, so it meets the requirements of live operation.

[0058] With the composite lightning arrester protective cover and insulating fixture provided by the present invention that can perform live operation, together with an insulating rod, live operation can be carried out without using a live operation vehicle for line power outage and supplementary power supply operations, greatly saving working time. The protective cover can be directly installed on the composite lightning arrester. During operation, standard insulating gloves and insulating boots can be worn to achieve a secondary protection effect. Multiple protections achieve complete insulation, providing safety protection for the staff, while greatly reducing working time and improving the overall working efficiency to a greater extent.

[0059] In summary, the present invention provides a composite lightning arrester protective cover that can perform live operation, with a unique and novel structure, simple and convenient installation, and can be operated at any time without a lifting platform, supplementary power supply, and large live operation vehicles, and can be installed on the composite lightning arrester under live conditions.

[0060] In addition, the present invention also provides an insulating fixture, which is cleverly designed and used to cooperate with the installation of the above-mentioned composite lightning arrester protective cover, clamping the composite lightning arrester protective cover and installing it on the lightning arrester under live conditions.

[0061] For the composite jacket metal oxide arrester in medium-voltage power distribution towers, the present invention designs a composite arrester protective cover that can be operated live. Based on the insulation of the protective cover, it is installed and operated in cooperation with special tools such as the insulating fixture provided by the present invention and the existing insulating rod (also known as the link rod), enabling operation at any time and place without the assistance of a lift table, without power supply supplementation, and without a large live operation vehicle. It can carry out inspection and temperature measurement work, with the advantages of high temperature and high pressure resistance and long service life, reducing the installation operation time from several hours to a few minutes.

[0062] It can be understood that for those of ordinary skill in the art, equivalent substitutions or changes can be made according to the technical solutions and inventive concepts of the present invention, and all such changes or substitutions should fall within the protection scope of the appended claims of the present invention.

Claims

1. An insulating fixture, characterized in that, It includes a clamping part for clamping the composite lightning arrester protective cover for live working and a fixing part that can be detachably connected to an insulating rod; The composite lightning arrester protective cover for live working includes a protective cover body and a protective cylinder for wrapping the cable of the composite lightning arrester; the protective cover body is provided with a cavity with an opening facing downwards and can be sleeved into the composite lightning arrester; the protective cylinder is horizontally fixed on the right side of the protective cover body; a first slit is axially opened at the top of the protective cylinder, and a second slit coplanar with the first slit is correspondingly opened at the top of the protective cover body; a third slit with a slit opening gradually increasing from right to left is axially opened at the bottom of the protective cylinder, and a fourth slit connected to the third slit is correspondingly opened on the right side of the protective cover body; A first through hole suitable for measuring the temperature of the composite lightning arrester is provided on the outer side of the protective cover body; a three-phase identification piece is detachably connected to the top of the protective cover body; an arc-shaped through hole is opened at the top of the protective cover body; a clamping block that is clamped with the arc-shaped through hole is provided at the bottom of the three-phase identification piece; a skirt that is wavy and inclined downwards extends outwards from the bottom of the protective cover body; The cavity is cylindrical; the protective cover body is cylindrical; the slit openings of the second slit and the first slit are both 1 mm wide; the slit opening of the fourth slit remains unchanged, and the slit opening of the third slit gradually increases from right to left to ensure that when the protective cylinder is pried open, the cable can move upwards from the bottom to the inner cavity of the protective cylinder; The clamping part is provided with two semicircular clamping slots suitable for inserting the protective cylinder; the clamping part is provided with a third through hole located between the two clamping slots and suitable for the cable of the composite lightning arrester to pass through; a cable opening suitable for the cable of the composite lightning arrester to move to the third through hole is opened at the bottom side of the clamping part; the fixing part is arranged on the left side of the clamping part and is fixedly connected to the clamping part; Support bars for clamping the protective cylinder are respectively provided on the outer sides of the clamping slots of the clamping part; It also includes an extension rod; a first connection hole suitable for inserting the extension rod is provided on the front side of the fixing part; the clamping part is provided with a connection part, and second connection holes and third connection holes suitable for the extension rod to be correspondingly inserted are respectively provided on the front side and the rear side of the connection part; a locking part suitable for sleeving the insulating rod is provided on the rear side of the fixing part; The connection part is cylindrical and a fourth connection hole is provided on the left side of the outer peripheral surface; an arc-shaped groove matched with the connection part is provided on the right side of the fixing part; a connection post suitable for inserting into the fourth connection hole is provided on the right side of the fixing part.

Images