CN218768925U - Insulator lightning arrester - Google Patents

Abstract

The utility model discloses an insulator arrester. The insulator lightning arrester comprises a leading and dialing member, a first electrode, a core body and a second electrode, wherein the leading and dialing member is coaxially arranged, the core body is located between the first electrode and the second electrode, and the leading and dialing member is located at one end, far away from the second electrode, of the core body. The insulator lightning arrester of this structure draws shifting piece and first electrode, core and second electrode through the setting, has integrateed the lightning protection function on having the voltage limiting function's basis to the installation operation can be installed and is accomplished, can improve the installation convenience, improves transmission network's security and reduction product purchase cost simultaneously.

Description

Insulator lightning arrester

Technical Field

The utility model relates to an overhead line and distribution network equipment technical field, concretely relates to insulator arrester.

Background

In recent years, with the rapid development of national socioeconomic and electric power construction, high-voltage transmission lines are erected to more and more places, the erection distance in a power transmission network is continuously increased, the problems of overhead laying of the transmission lines need to be noticed, and especially the problem that the transmission lines are struck by lightning is more and more prominent. The transmission line is usually provided with a voltage limiter which can prevent power frequency follow current from arcing after the circuit is accumulated, so that the protection effect is better, and the reliability of the transmission network is improved to a limited extent. However, the traditional voltage limiter only has a voltage limiting function and a lightning protection function, and an overhead line support column needs to be additionally installed when a line is erected, so that two devices need to be installed in one operation, the cost is increased, and the operation is laborious.

Therefore, how to provide a product with both insulation support and lightning stroke protection is a technical problem to be solved at present.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an insulator arrester uses the insulator arrester of this structure to integrate the lightning protection function on the basis that has the voltage limiting function, improves the security of transmission of electricity network when improving installation convenience.

The existing support column insulator is only used as a special insulating space, can play a role in supporting a lead and preventing current from flowing back to the ground in an overhead transmission line, cannot generate flashover breakdown caused by changes of environment and charge conditions to cause failure, and can damage the service life and the service life of the whole line due to the self-failure of the insulator. The insulator is usually provided with a plurality of disc insulators for once creepage distance, and is usually made of glass or ceramic or rubber, but has no lightning protection function.

According to the utility model discloses insulator arrester, including draw the plectrum with draw first electrode, core and the second electrode of the coaxial setting of plectrum, the core is located first electrode with between the second electrode, draw the plectrum to be located the core keeps away from the one end of second electrode.

In some embodiments, the puller may also be located at an end of the core body remote from the first electrode.

Specifically, the first electrode, the core body and the second electrode are sleeved on the guiding and shifting piece.

Further, the first hardware fitting is located the core is kept away from the one end of the second electrode, the second hardware fitting is located the core body is close to the one end of the second electrode, and the first hardware fitting and the second hardware fitting are coaxial and are arranged oppositely.

In some embodiments, the conductive rod is inserted into the first electrode, and an insulating layer is wound on the surface of the conductive rod from the position close to the first electrode to the position far away from the first electrode.

Specifically, the discharge ball is inserted into one end of the conductive rod far away from the first electrode.

Furthermore, the conducting rod is bent towards one end far away from the second electrode, and an included angle between the bent section and the core body is an acute angle.

In some embodiments, the leading and pulling member, the first electrode, the core body and the second electrode are connected with the insulating layer on the outer surface of the leading and pulling member, the first electrode, the core body and the second electrode through sleeving.

Specifically, the insulating layer is made of a silicon rubber composite material.

Further, an insulating layer is arranged between the core body and the drawing and stirring piece.

To sum up, the insulator arrester disclosed in this application draws dial piece and first electrode, core and second electrode through the setting, has integrateed the lightning protection function on the basis that has the voltage limiting function to once the installation operation can install the completion, can improve the installation convenience, improve transmission of electricity network's security and reduce product purchase cost simultaneously.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a structural view of an insulator surge arrester in one embodiment;

fig. 2 is a structural view of an insulator arrestor in another embodiment.

Reference numerals:

an insulator lightning arrester 100,

The lead-dial piece 101, the first electrode 102, the core body 103, the second electrode 104, the first hardware 105, the second hardware 106, the conductive rod 107, the discharge ball 108 and the bolt 110.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "length", "diameter", "upper", "rear", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

An insulator arrester 100 according to an embodiment of the present invention is described below with reference to fig. 1.

Referring to fig. 1, the insulator arrester 100 according to the embodiment of the present invention includes a drawing member 101 and a first electrode 102, a core 103 and a second electrode 104 coaxially disposed on the drawing member 101, where the core 103 is located between the first electrode 102 and the second electrode 104, and the drawing member 101 is located at one end of the core 103 far away from the second electrode 104.

In the present application, the length and diameter of the puller 101 are not limited herein, and the length of the core 103 is not limited herein, and the diameter of the core 103 should be the same as the diameter of the puller 101, and the length and diameter can be adjusted appropriately according to the transmission network line interval. Optionally, the length of the pick-up 101 is 0.5 meter and the diameter is 0.1 meter, and the length of the core body 103 is 0.5 meter and the diameter is 0.1 meter.

The puller 101 is typically a fiberglass rod, which is high temperature pultruded by impregnating a high temperature epoxy matrix with fiberglass. The high-voltage cable has the characteristics of high voltage, corrosion resistance, no deformation or delamination, long service life, stable mechanical property, excellent insulating property and the like, and has excellent tensile resistance. Usually the tensile strength can reach 1360Mpa or more.

The core body 103 is made of zinc oxide, and the zinc oxide has good nonlinear volt-ampere characteristics, so that the resistance value is very large under normal working voltage, namely the resistance value is in an insulation state, and the current flowing through the lightning arrester is very small; when the overvoltage acts, the resistance drops sharply, which is equivalent to a short circuit state, and the energy of the overvoltage is discharged, so that the protection effect is achieved. And after being struck, the zinc oxide can restore the insulation state, namely, the high-resistance state is restored. In some embodiments, the zinc oxide core 103 may also be composed of a plurality of pie-shaped zinc oxide resistor sheets connected in series, and the pie-shaped zinc oxide resistor sheets may improve the overall mechanical strength, protection level, current permeability, residual voltage, and sealing performance over conventional resistors. The first electrode 102 is fixed to the upper end of the zinc oxide core 103, and the second electrode 104 is fixed to the lower end of the zinc oxide core 103. The puller 101, the first electrode 102, the core 103, and the second electrode 104 are coaxially fixed to the bolt 110. The first electrode 102 and the second electrode 104 are used for conducting electricity. The diameter of the cake-shaped zinc oxide resistor is not limited, the diameter of the cake-shaped zinc oxide resistor is the same as that of the puller 101, and preferably, the diameter of the zinc oxide resistor is 615mm to 7850mm.

The whole section of the core body 103 consists of a discharge gap insulating section and an overvoltage-proof lightning arrester section, the protective gap is insulating under the condition of normal operation, when an overhead power line is struck by lightning, air in the gap is punctured, lightning current is discharged into the ground, and instantaneous voltage and current of a line insulator and a circuit are not overhigh, so that the protective effect is achieved; the lightning arrester section is formed by connecting a plurality of cake-shaped zinc oxide core resistance cards in series.

In other embodiments, the zinc oxide core 103 may also be an integral cylindrical resistor, which reduces manufacturing costs without changing performance as compared to a series annular resistor.

In some embodiments, the puller 101 may also be located at an end of the core 103 distal from the first electrode 102.

Specifically, the structure of the insulator arrester 100 may be arranged in the order of the pick-up 101, the first electrode 102, the core 103, and the second electrode 104 from top to bottom. The first electrode 102, the core 103, the second electrode 104 and the puller 101 may be arranged in this order from top to bottom. Or the drawing piece 101, the second electrode 104, the core body 103 and the first electrode 102 are arranged in sequence. The order of arranging the elements in the insulator arrester 100 is not limited herein.

In some embodiments, the first electrode 102, the core 103, and the second electrode 104 are sleeved on the dial-up member 101.

Specifically, the lower end of the leading and dialing member 101 comprises a leading and dialing pipe with a diameter far smaller than that of the leading and dialing member 101, the first electrode 102, the core body 103 and the second electrode 104 are sleeved on the leading and dialing pipe at the lower end of the leading and dialing member 101, the first electrode 102, the core body 103 and the second electrode 104 are sequentially connected in series, and are fixed together by a moisture-proof insulating layer 109, so that the leading and dialing member 101 and the core body 103 are prevented from being conducted due to rainwater or snow, and the lightning protection function is lost.

In another embodiment, the lower end of the drawing member 101 is provided with a wall structure, i.e. a drawing wall, having the same diameter as the drawing member 101, the first electrode 102, the core 103, and the second electrode 104 are disposed on the drawing wall of the lower end of the drawing member 101, and the first electrode 102, the core 103, and the second electrode 104 are connected in series.

In some embodiments, the first fitting 105 is located at one end of the core body 103 far away from the second electrode 104, the second fitting 106 is located at one end of the core body 103 close to the second electrode 104, and the first fitting 105 and the second fitting 106 are coaxially and oppositely disposed.

In other embodiments, the fixing surfaces of the first hardware 105 and the second hardware 106 and the bolt 110 are provided with threads, and the surface of the same bolt 110 is provided with fixing threads matched with the first hardware 105 and the second hardware 106. The first hardware fitting 105 and the second hardware fitting 106 are fixed on the screw rod through thread self-locking. The structure scheme has the advantages of simple structure, reliable connection, convenient assembly and disassembly, contribution to later-stage maintenance and high mechanical reliability. And the first fitting 105, the second fitting 106 and the center of the bolt are in a straight line, i.e. coaxially arranged.

Specifically, when the structure of the insulator lightning arrester 100 is arranged from top to bottom and the drawing member 101, the first electrode 102, the core body 103 and the second electrode 104 are sequentially arranged, the first hardware fitting 105 is arranged at one end of the core body 103 far away from the second electrode 104, that is, the first hardware fitting 105 is arranged at the upper end of the drawing rod; the second metal fitting 106 is disposed at one end of the core 103 close to the second electrode 104, that is, at a lower end of the second metal fitting 106. And the second gold 106 needs to be pressed tightly against the second electrode 104. The first hardware 105 and the second hardware 106 are fixed on the screw, and the fixed first hardware 105, the second hardware 106, the drawing part 101, the first electrode 102, the core body 103 and the second electrode 104 form a whole. The first fitting 105 and the second fitting 106 are coaxially and oppositely disposed. And the first metal fitting 105, the second metal fitting 106, the drawing piece 101, the first electrode 102, the core body 103 and the second electrode 104 are coaxial.

In some embodiments, the conductive rod 107 is inserted into the first electrode 102, and the insulating layer 109 is wound on the surface of the conductive rod 107 from the direction close to the first electrode 102 to the direction away from the first electrode 102.

Specifically, when the structure of the insulator lightning arrester 100 is arranged from top to bottom in the sequence of the pick-up 101, the first electrode 102, the core 103, and the second electrode 104, the first electrode 102 is provided with a cylindrical recess for inserting the conductive rod 107, and the diameter of the cylindrical opening of the first electrode 102 should be equal to the diameter of the conductive rod 107. The conductive rod 107 is used for lightning strike, so as to prevent the power transmission line from breaking down. The surface of the conductive rod 107 is further provided with an insulating layer 109 for transmitting current to the first electrode 102 when the conductive rod 107 is conducted, so as to prevent the current from breaking down the conductive rod 107 during the conducting process. The insulating layer 109 on the surface of the conductive rod 107 is wound from the end near the first electrode 102 to the end far from the first electrode 102. The insulating layer 109 wound on the surface of the conductive rod 107 can avoid personal accidents caused by high-voltage suspension potential.

In other embodiments, the insulating layer 109 on the surface of the conductive rod 107 wraps from the end away from the first electrode 104 to the end near the first electrode 102.

In another embodiment, the surface of the conductive bar 107 is an integrally formed insulating layer 109.

In one embodiment, a discharge bulb 108 is inserted into an end of the conductive rod 107 away from the first electrode 102.

Specifically, the discharge ball 108 is provided with a cylindrical recess for insertion with the conductive rod 107. The discharge ball 108 and the first fitting 105 form a gap, and the reliable action of the gap has a protective effect on a current source loop, can reduce inductance, and has a shielding effect of a certain current. The discharge ball 108 is also used to discharge static electricity. The size of the discharge ball 108 is not limited herein, and the diameter of the discharge ball 108 can be adjusted appropriately according to the voltage of the power transmission network to ensure that the gap discharge voltage value and stability requirements are met. Optionally, the diameter of the discharge ball 108 is phi 10-phi 20mm, and the discharge ball 108 with the size is not easy to cause gap short circuit when being subjected to rain, icing, accumulated snow and accumulated bird dung.

In one embodiment, the conductive rod 107 is bent towards the end away from the second electrode 104, and the bent section forms an acute angle with the core 103.

Specifically, the conductive rod 107 is bent towards an end away from the second electrode 104, an included angle between the bent segment and the core 103 is an acute angle, and an unbent portion of the conductive rod 107 is disposed at a right angle with the first electrode 102. The conductive rod 107 may also be bent toward an end near the second electrode 104.

In other embodiments, as shown in fig. 2, the conductive rod 107 is bent toward an end near the second electrode 104, and the bent portion of the conductive rod 107 forms an obtuse angle with the non-bent portion. In other embodiments, after the conductive rod 107 is bent toward the end close to the second electrode 104 or the conductive rod 107 is bent toward the end far from the second electrode 104, the included angle between the bent segment and the conductive rod 107 is an acute angle. In another embodiment, after the conductive rod 107 is bent toward the end close to the second electrode 104 or the conductive rod 107 is bent toward the end far from the second electrode 104, the included angle between the bent segment and the conductive rod 107 is a right angle. In another embodiment, the conductive bar 107 is not bent.

In one embodiment, the puller 101, the first electrode 102, the core 103, and the second electrode 104 are coupled to the insulation 109 on the outer surface of the puller 101, the first electrode 102, the core 103, and the second electrode 104 by sleeving.

Specifically, the lower end of the leading and dialing member 101 comprises a leading and dialing pipe with a diameter far smaller than that of the leading and dialing member 101, the first electrode 102, the core body 103 and the second electrode 104 are sleeved on the leading and dialing pipe at the lower end of the leading and dialing member 101, the first electrode 102, the core body 103 and the second electrode 104 are sequentially connected in series, and the insulating layer 109 is arranged on the outer surfaces of the leading and dialing member 101, the first electrode 102, the core body 103 and the second electrode 104, so that the leading and dialing member 101, the first electrode 102, the core body 103 and the second electrode 104 are completely sealed to the outside, and electricity leakage of the insulator lightning arrester 100 is prevented.

In one embodiment, the insulating layer 109 is a silicon rubber composite.

Specifically, the silicon rubber composite material arranged on the outer surfaces of the leading and pulling piece 101, the first electrode 102, the core 103 and the second electrode 104 has good insulation, and the silicon rubber composite material has high chemical stability, heat resistance, low glass transition temperature and good cold resistance, so that the silicon rubber composite outer sleeve has a wide application range. Meanwhile, the silicone rubber jacket has good waterproofness and insulativity, the problem of electric leakage cannot be caused, and insulating silicon can be generated even after combustion.

In other use scenes, the silicon rubber composite material has better aging resistance, and the silicon material has good ultraviolet resistance, is not easy to age due to ultraviolet irradiation and also generates cracks due to aging after long-term use.

In other embodiments, the outer-coated silicon rubber composite insulating layer 109 may be provided in an umbrella shape. The umbrella-shaped silicone rubber composite insulating layer 109 can reduce the large-scale manual cleaning of the insulator arrester 100. However, when the distance between the umbrellas is too small, the umbrella skirt is easy to bridge and short-circuit under the dirty condition, and the purpose of providing the antifouling property cannot be achieved. The umbrella covers of the insulator lightning arrester 100 are all provided with umbrella skirts with different umbrella diameters, and the umbrella skirts with different diameters are arranged in a staggered mode. The diameter ratio of the large umbrella and the small umbrella is required to be not less than 30mm. When the insulator lightning arrester 100 encounters extreme weather such as low-temperature rain, snow, ice and freezing weather, the umbrella-shaped silicon rubber has abundant umbrella-shaped structures and increased umbrella diameters and umbrella intervals, the large umbrella skirt can play a good shielding effect on the small umbrella skirt, the ice bridging time between umbrellas is effectively delayed, the ice bridging between umbrellas can be effectively prevented, the overall creepage distance and the dry arc distance are increased, the flashover voltage of dirt resistance and ice covering of the umbrella-shaped silicon rubber is greatly improved, and the probability of line tripping in the freezing weather is greatly reduced. Under the ice-coating weather condition, the power frequency voltage borne by the insulator lightning arrester 100 is lower, and the influence of uneven ice coating on the metal oxide of the insulator lightning arrester 100 is favorably prevented. Meanwhile, a plurality of umbrella-shaped structures can be arranged, and the umbrella-shaped silicon rubber can also provide an antifouling effect for the insulator lightning arrester 100. Aiming at the anti-fouling umbrella-shaped silicon rubber, the angle of the umbrella skirt needs to be increased so as to improve the anti-fouling and self-cleaning capabilities of the umbrella-shaped structure, and the angle of the umbrella skirt needs to be not less than 15 degrees. The umbrella-shaped silicon rubber for providing the antifouling effect can be arranged in a staggered mode with the umbrella-shaped silicon rubber for providing the freezing effect, the number of the umbrella-shaped silicon rubber structures is not limited, and preferably, 2 umbrella-shaped silicon rubber structures for providing the antifouling effect and 2 umbrella-shaped silicon rubber structures for providing the anti-icing effect are arranged. In other embodiments, 3 umbrella-shaped silicone rubber structures providing an anti-fouling effect and 3 umbrella-shaped silicone rubber structures providing an anti-icing effect can be provided. The number of umbrella-shaped silicone rubber structures providing an anti-fouling effect and the umbrella-shaped silicone rubber structures providing an anti-icing effect can be appropriately modified according to the height of the insulator arrester 100 and the degree of environmental severity in which it is located.

To sum up, the insulator lightning arrester 100 of this application structure draws dial-up 101 and first 102, core 103 and second electrode 104 through the setting, has integrated the lightning protection function on the basis that has the voltage limiting function to once the installation operation can install the completion, can improve the installation convenience, improve transmission network's security and reduce product purchase cost simultaneously.

In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. An insulator lightning arrester (100) is characterized by comprising a leading and pulling piece (101) and a first electrode (102), a core body (103) and a second electrode (104) which are coaxially arranged on the leading and pulling piece (101), wherein the core body (103) is positioned between the first electrode (102) and the second electrode (104), and the leading and pulling piece (101) is positioned at one end, far away from the second electrode (104), of the core body (103).

2. The insulator arrester (100) according to claim 1, characterized in that the pick-up (101) is also located at an end of the core body (103) remote from the first electrode (102).

3. The insulator arrester (100) according to claim 1, wherein the first electrode (102), the core body (103), and the second electrode (104) are sleeved on the pick-up member (101).

4. The insulator arrester (100) according to claim 1, further comprising a first fitting (105) and a second fitting (106), wherein the first fitting (105) is located at one end of the core body (103) far away from the second electrode (104), the second fitting (106) is located at one end of the core body (103) close to the second electrode (104), and the first fitting (105) and the second fitting (106) are coaxially and oppositely arranged.

5. The insulator arrester (100) according to claim 1, further comprising a conductive rod (107), wherein the conductive rod (107) is inserted into the first electrode (102), and an insulating layer (109) is wound on the surface of the conductive rod (107) from the position close to the first electrode (102) to the position far away from the first electrode (102).

6. The insulator arrester (100) according to claim 5, further comprising a discharge ball (108), wherein the discharge ball (108) is inserted into an end of the conductive rod (107) away from the first electrode (102).

7. The insulator arrester (100) according to claim 5, characterized in that the conducting rod (107) is bent towards the end away from the second electrode (104), and the bent section forms an acute angle with the core body (103).

8. The insulator arrester (100) according to claim 1, characterized in that the pick-up member (101), the first electrode (102), the core (103) and the second electrode (104) are connected to the insulating layer (109) on the outer surface of the pick-up member (101), the first electrode (102), the core (103) and the second electrode (104) by means of a sleeve.

9. The insulator arrester (100) according to claim 8, characterized in that the insulating layer (109) is a silicone rubber composite.

10. The insulator arrester (100) according to claim 1, characterized in that an insulating layer (109) is arranged between the core body (103) and the pick-up member (101).

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