CN213070766U - High-strength cage-type composite outer sleeve lightning arrester for medium-voltage system - Google Patents
High-strength cage-type composite outer sleeve lightning arrester for medium-voltage system Download PDFInfo
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- CN213070766U CN213070766U CN202022349990.3U CN202022349990U CN213070766U CN 213070766 U CN213070766 U CN 213070766U CN 202022349990 U CN202022349990 U CN 202022349990U CN 213070766 U CN213070766 U CN 213070766U
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Abstract
The utility model relates to the technical field of power system protection equipment, in particular to a high-strength cage-type composite outer sleeve lightning arrester for a medium-voltage system, which comprises a metal oxide resistance card column and a composite outer sleeve, wherein epoxy glass fiber drawing bars annularly distributed along the outer side of the metal oxide resistance card column are arranged on the outer side of the metal oxide resistance card column, a plurality of groups of epoxy glass fiber drawing bars are arranged on the epoxy glass fiber drawing bars, and its top and bottom are installed respectively in top end and bottom end, and metallic oxide resistance card post, the fine drawing stick of epoxy glass, top end, cage structure is constituteed to the bottom end, and top end, bottom end correspond the installation department of the fine drawing stick of epoxy glass and all are equipped with the hole groove, and the hole groove is the annular along metallic oxide resistance card post periphery and distributes, and the fine drawing stick of epoxy glass corresponds the hole inslot of installing at top end, bottom end, and compound overcoat vulcanization moulding is in metallic oxide resistance card post, the fine drawing stick of epoxy glass and the outside of two sets of ends. The utility model has the advantages of high mechanical strength, stable performance and good explosion-proof performance.
Description
Technical Field
The utility model relates to an electric power system protective apparatus technical field especially relates to a high strength cage type composite coat arrester for medium voltage system.
Background
The lightning arrester is an important internal overvoltage protection device in a power system, and has many faults caused by poor sealing, damage of a resistance card and the like in field operation, so that the safe operation and the operation reliability of the power system are influenced. Even fragments generated by the breakdown explosion of the arrester destroy nearby equipment facilities, endangering the safety of nearby personnel. The composite coated metal oxide lightning arrester has good protection characteristic and explosion-proof characteristic, and is applied to multiple voltage levels. Especially in medium-voltage power systems, the lightning arrester with the porcelain sleeve is basically replaced, and the lightning arrester with the porcelain sleeve is widely applied.
The overvoltage protection function element of the arrester is a metal oxide resistor disc column, and in order to ensure that the overvoltage protection function element can operate for a long time and even can stably operate under severe weather conditions, at present, various manufacturers mainly adopt the following three technical routes in the manufacture of medium-voltage arresters:
the medium-voltage lightning arrester with the insulating tube type core body is characterized in that a matched resistor disc column is arranged in a prefabricated insulating tube with a silicon rubber outer sleeve; or the resistance card column is arranged in the insulating tube in advance, and then the outer sleeve of the silicon rubber is formed by vulcanization. Due to the problems of space matching, insufficient pressing force of the spring and the like, sometimes the resistance card columns cannot be regularly arranged; the contact pressure between the resistance cards is insufficient, so that the failure rate of the lightning arrester is high. And because the arrester using the insulating tube type for the medium voltage system generally has no effective pressure relief device, the arrester may explode in case of failure, and the safety of equipment and personnel nearby the crisis may be caused.
The medium voltage lightning arrester with the winding type core is usually formed by winding an insulating cloth tape or insulating fibers, and can bear low mechanical force generally. And because the winding type lightning arrester adopted for the medium-voltage system does not have an effective pressure relief device generally, the lightning arrester is easy to crush and explode in case of failure, and the safety of equipment and personnel nearby the crisis is
The medium voltage arrester with cage core usually adopts the mode of extrusion to fix the insulating rod in the hole of end both sides, but for medium voltage arrester, because the insulating rod quantity of adopting is limited (for example 4, 8), and whole bending strength is not high. The core body of the built-in belleville spring needs special equipment for manufacturing, and needs to be tightly pressed while being extruded. The manufacturing process is complicated and the equipment requirement is high.
SUMMERY OF THE UTILITY MODEL
To the above situation, for overcoming the defect of prior art, the utility model aims to provide a middling pressure is compound overcoat arrester of high strength cage type for system, this kind of compound overcoat arrester of cage type has improved quality and mechanical properties, and the cost is lower, can the large-scale production middling pressure compound overcoat metal oxide arrester through using general equipment, and explosion-proof good performance.
The above technical purpose of the present invention can be achieved by the following technical solutions:
the high-strength cage-type composite outer sleeve lightning arrester for the medium-voltage system comprises a metal oxide resistance card column and a composite outer sleeve, wherein epoxy glass fiber drawing rods distributed annularly along the outer side of the metal oxide resistance card column are arranged on the outer side of the metal oxide resistance card column, a plurality of groups of epoxy glass fiber drawing rods are arranged on the epoxy glass fiber drawing rods, the tops and the bottoms of the epoxy glass fiber drawing rods are respectively installed in a top end and a bottom end, the metal oxide resistance card column, the epoxy glass fiber drawing rods, the top end and the bottom end form a cage-shaped structure, hole grooves are formed in the installation positions, corresponding to the epoxy glass fiber drawing rods, of the top end and the bottom end and are distributed annularly along the periphery of the metal oxide resistance card column, the epoxy glass fiber drawing rods are correspondingly installed in the hole grooves of the top end and the bottom end, and the composite outer sleeve is vulcanized and molded on the metal oxide resistance card column, the, Exterior of the bottom head.
Furthermore, the top of the metal oxide resistance chip column is provided with an upper positioning pressure electrode, the top of the upper positioning pressure electrode is provided with a top fastening bolt, the top fastening bolt is in threaded connection with the center of a matching nut inside the top end head, and the bottom of the top fastening bolt is tightly pressed on the top surface of the upper positioning pressure electrode.
Furthermore, a lower positioning pressure electrode is arranged at the bottom of the metal oxide resistance chip column, a bottom fastening bolt is arranged at the bottom of the lower positioning pressure electrode, and the bottom fastening bolt is fixed at the end head of the bottom.
Furthermore, the edges of the upper positioning pressure electrode and the lower positioning pressure electrode are provided with the slots with the same number as the epoxy glass fiber drawing rods, so that the positioning and the assembly of the epoxy glass fiber drawing rods are facilitated.
Furthermore, a side wire outlet connecting block and an insulating cushion block are fixedly mounted between the lower positioning pressure electrode and the bottom end head, the side wire outlet connecting block and the insulating cushion block are distributed from top to bottom, and a side wire outlet bolt is fixedly connected to the outer wall of the side wire outlet connecting block.
Further, the diameter of the epoxy glass fiber drawing rod is controlled to be between 4mm and 6 mm.
To sum up, the utility model discloses following beneficial effect has:
the utility model discloses a metal oxide resistance card post assembles in the cage type structure that the fine drawing stick of the nearly 12 epoxy glass and top end and bottom end are constituteed, adopt the supplementary extruded mode of mucilage binding to draw fine drawing stick of the fine drawing stick of epoxy glass and top end and the firm fixed of bottom end, make the whole mechanical properties of arrester have obvious improvement, be applicable to strong wind, abominable environment such as strong earthquake, be applicable to the transformer substation that mechanical pulling force is obviously higher than the standard requirement, projects such as wind-powered electricity generation field, can adopt general equipment, for example, the composite insulator extruder extrudes, replace the special extruder that has extrusion and the tight effect in top simultaneously, the technology is more simple and convenient and stable.
The utility model discloses a top end and bottom end adopt cast aluminium technology, 12 even hole grooves are respectively reserved at the edge, can be according to the demand of the different voltage level arresters of product, also can be according to project/customer's actual requirement, can satisfy different voltage level arresters, project/customer require and have under the condition of appropriate margin, the quantity that the glass pull-out stick of moderate degree reduction epoxy was used (control between 4~12 usually), control cost, reduce unnecessary consumption, consequently, this design is suitable for the compound overcoat metal oxide arrester of middling pressure of the most different voltage levels, almost can cover the requirement of most customers/projects, especially can satisfy the requirement that has high mechanical properties arrester.
Third the utility model discloses a tight bolt top of top is tightly gone up positioning pressure electrode, utilize special frock with the orderly range of resistance card post inside the arrester core at the tight in-process in top, the effect of resistance card is exerted to bigger degree, place the inside stainless steel nut cooperation of end in the utilization in, it is tight to compare only utilize the inside screw thread top of aluminium end, can guarantee bigger more stable top tension, can adopt specialized tool to carry out ration top tightly, make the product uniformity better, it is more stable.
The utility model discloses an upper positioning pressure electrode and lower positioning pressure electrode have the single face casting line, and this line face compresses tightly with the aluminium electrode of resistance card post, and more ordinary plane aluminium cushion can be favorable to better with the distribution of electrical contact and the impulse current in the resistance card post of resistance card aluminium electrode. The edges of the upper positioning pressure electrode and the lower positioning pressure electrode are provided with the slots with the same number as the epoxy glass fiber drawing rods, so that the positioning and the assembly of the epoxy glass fiber drawing rods are facilitated, and the working efficiency is improved.
The utility model discloses a metallic oxide resistance card post assembles in the cage type structure that the fine drawing stick of the glass of up to 12 epoxy and top end and bottom end are constituteed, has certain interval between the fine drawing stick of epoxy, is favorable to having sufficient pressure release space after the arrester breaks down in case, and the fine drawing stick of epoxy can prevent the inside part outwards to fly out, can not cause crushing explosion, endangers near equipment and personal safety. Compared with a winding core and an insulating tubular core, the winding core and the insulating tubular core have higher safety.
Sixthly, the high-temperature vulcanized silicone rubber jacket adopted by the high-strength cage-type composite jacket arrester for the medium-voltage system is produced by adopting the integral one-step forming technology, and can effectively prevent the arrester from being affected with damp and causing damage or even explosion risk. Meanwhile, because no air gap is arranged inside, the positioning pressure electrode is in close contact with the resistor disc column, the improvement of the heat dissipation efficiency of the lightning arrester is facilitated, and the long-term stable operation of the lightning arrester is facilitated.
The utility model discloses a diameter of epoxy glass fiber drawing stick is less, is benefited in large-scale production, and the cost is lower, and the cooperation uses the silicon rubber overcoat, has alleviateed the weight of this middling pressure arrester, has reduced the cost of transportation, has alleviateed the work load in the installation.
To sum up, the utility model has the advantages of simple process, with low costs, mechanical strength is high, the stable performance, and explosion-proof performance is good, can adopt general equipment to carry out large-scale production, and investment cost is low, is applicable to extensive popularization.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, do not constitute a limitation of the invention, and in which:
fig. 1 is a cross-sectional side view of a high-strength cage-type composite housed arrester for medium voltage systems;
FIG. 2 is a diagram of a high-strength cage-type composite housed arrester with a side outgoing line core for a medium-voltage system;
fig. 3 is a cross-sectional view of a high-strength cage-type composite cased lightning arrester for a medium-voltage system.
In the figure, 1, a top fastening bolt; 2. a top end; 3. an upper positioning pressure electrode; 4. epoxy glass fiber drawing rod; 5. a metal oxide resistor disc column; 6. compounding the outer sleeve; 7. a side outlet bolt; 8. a lower positioning pressure electrode; 9. a side outgoing line connecting block; 10. insulating cushion blocks; 11. a bottom end; 12. the bottom tightly fixes the bolt.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings 1 to 3. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
Example 1: as shown in fig. 1 to 3, a high-strength cage-type composite outer sleeve lightning arrester for medium-voltage system, including a metal oxide resistance card column 5 and a composite outer sleeve 6, the outer side of the metal oxide resistance card column 5 is provided with epoxy glass fiber drawing rods 4 distributed annularly along the outer side thereof, the diameter of the epoxy glass fiber drawing rods 4 is controlled between 4mm and 6mm, the epoxy glass fiber drawing rods 4 are provided with a plurality of groups, the tops and the bottoms of the epoxy glass fiber drawing rods are respectively installed in a top end head 2 and a bottom end head 11, the epoxy glass fiber drawing rods 4, the top end head 2 and the bottom end head 11 are firmly fixed integrally by adopting a glue-filling auxiliary extrusion mode, and the metal oxide resistance card column 5, the epoxy glass fiber drawing rods 4, the top end head 2 and the bottom end head 11 form a cage-shaped structure.
The installation department that top end 2, bottom end 11 correspond the fine drawing stick 4 of epoxy glass all is equipped with the hole groove, and the hole groove is the annular along 5 peripheries of metal oxide resistance card post and distributes, and the fine drawing stick 4 of epoxy glass corresponds installs inside the hole groove of top end 2, bottom end 11, and compound overcoat 6 vulcanization molding draws the outside of stick 4, top end 2, bottom end 11 at metal oxide resistance card post 5, the fine drawing stick of epoxy glass.
The top of metal oxide resistance card post 5 is equipped with location pressure electrode 3, and the top of going up location pressure electrode 3 is equipped with top holding bolt 1, and top holding bolt 1 threaded connection is in the inside cooperation nut center department of top end 2, and the bottom of top holding bolt 1 compresses tightly on the top surface of last location pressure electrode 3.
The bottom of the metal oxide resistance chip column 5 is provided with a lower positioning pressure electrode 8, the bottom of the lower positioning pressure electrode 8 is provided with a bottom fastening bolt 12, and the bottom fastening bolt 12 is fixed at the bottom end 11.
Go up positioning pressure electrode 3 and lower positioning pressure electrode 8 and have single face casting line, this line face compresses tightly with the aluminium electrode of resistance card post, can be favorable to the distribution of electrical contact and impulse current at resistance card post tip better, and the edge of going up positioning pressure electrode 3 and lower positioning pressure electrode 8 has the fluting the same with 4 quantity of epoxy glass fiber extraction stick, is favorable to the location and the assembly of epoxy glass fiber extraction stick 4.
A side outlet connecting block 9 and an insulating cushion block 10 are fixedly arranged between the lower positioning pressure electrode 8 and the bottom end 11, the side outlet connecting block 9 and the insulating cushion block 10 are distributed from top to bottom, and the outer wall of the side outlet connecting block 9 is fixedly connected with a side outlet bolt 7.
The installation method comprises the following steps: the metal oxide resistance card column 5 and other internal parts are arranged in order in a special tool, a special tool is used for quantitatively jacking to form a core body of the metal oxide resistance card column 5, high-temperature vulcanized silicone rubber is wrapped on the core body of the metal oxide resistance card column 5 in a flat vulcanizing machine or an injection vulcanizing machine for outer sleeve forming, and the side outgoing line bolt 7 can be directly fixed on the core body in the forming process.
Glue one end of 12 epoxy glass fiber drawing bars 4 in the bottom end 11, then carry out quantitative extrusion, assemble insulating pad 10, side play line connecting block 9, lower positioning pressure electrode 8, metal oxide resistance card post 5, last positioning pressure electrode 3 in proper order on the upper portion of bottom end 11 respectively, all spare parts are located the inside of epoxy glass fiber drawing bars 4, form cage-shaped structure, glue dress top end 2 at last, and carry out quantitative extrusion.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (6)
1. The utility model provides a high strength cage type composite coat arrester for medium voltage system, includes metal oxide resistance card post (5), composite coat (6), its characterized in that: the outside of metal oxide resistance card post (5) is equipped with the fine pull rod (4) of epoxy glass who is the annular and distributes along its outside, the fine pull rod (4) of epoxy glass is equipped with the multiunit, and installs respectively in top end (2) and bottom end (11) its top and bottom, the fine pull rod (4) of metal oxide resistance card post (5), epoxy glass, top end (2), bottom end (11) constitute cage structure, the installation department that top end (2), bottom end (11) correspond the fine pull rod (4) of epoxy glass all is equipped with the hole groove, the hole groove is distributed along metal oxide resistance card post (5) periphery is the annular, the fine pull rod (4) of epoxy glass corresponds the hole inslot portion of installing at top end (2), bottom end (11), compound overcoat (6) vulcanization moulding is at metal oxide resistance card post (5), The epoxy glass fiber drawing rod (4), the top end (2) and the bottom end (11).
2. The high-strength cage-type composite housed arrester for medium-voltage system according to claim 1, characterized in that: the top of metal oxide resistance card post (5) is equipped with positioning pressure electrode (3), the top of going up positioning pressure electrode (3) is equipped with top holding bolt (1), top holding bolt (1) threaded connection is in the inside cooperation nut center department of top end (2), just the bottom of top holding bolt (1) compresses tightly in the top surface of last positioning pressure electrode (3).
3. The high-strength cage-type composite housed arrester as claimed in claim 2, wherein: the bottom of the metal oxide resistance chip column (5) is provided with a lower positioning pressure electrode (8), the bottom of the lower positioning pressure electrode (8) is provided with a bottom fastening bolt (12), and the bottom fastening bolt (12) is fixed at a bottom end (11).
4. The high-strength cage-type composite housed arrester as claimed in claim 3, wherein: the edges of the upper positioning pressure electrode (3) and the lower positioning pressure electrode (8) are provided with grooves with the same number as the epoxy glass fiber drawing rods (4), so that the positioning and the assembly of the epoxy glass fiber drawing rods (4) are facilitated.
5. The high-strength cage-type composite housed arrester for medium-voltage system according to claim 4, characterized in that: a side wire outlet connecting block (9) and an insulating cushion block (10) are fixedly arranged between the lower positioning pressure electrode (8) and the bottom end (11), the side wire outlet connecting block (9) and the insulating cushion block (10) are distributed from top to bottom, and a side wire outlet bolt (7) is fixedly connected with the side wire outlet connecting block (9).
6. The high-strength cage-type composite housed arrester as claimed in claim 5, wherein: the diameter of the epoxy glass fiber drawing rod (4) is controlled to be between 4mm and 6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022349990.3U CN213070766U (en) | 2020-10-20 | 2020-10-20 | High-strength cage-type composite outer sleeve lightning arrester for medium-voltage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022349990.3U CN213070766U (en) | 2020-10-20 | 2020-10-20 | High-strength cage-type composite outer sleeve lightning arrester for medium-voltage system |
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| Publication Number | Publication Date |
|---|---|
| CN213070766U true CN213070766U (en) | 2021-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022349990.3U Active CN213070766U (en) | 2020-10-20 | 2020-10-20 | High-strength cage-type composite outer sleeve lightning arrester for medium-voltage system |
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| CN (1) | CN213070766U (en) |
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- 2020-10-20 CN CN202022349990.3U patent/CN213070766U/en active Active
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