CN114360826A - Direct mould pressing type composite outer sleeve lightning arrester and manufacturing method thereof - Google Patents
Direct mould pressing type composite outer sleeve lightning arrester and manufacturing method thereof Download PDFInfo
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- CN114360826A CN114360826A CN202111465209.1A CN202111465209A CN114360826A CN 114360826 A CN114360826 A CN 114360826A CN 202111465209 A CN202111465209 A CN 202111465209A CN 114360826 A CN114360826 A CN 114360826A
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Abstract
The invention relates to the technical field of power transmission and distribution primary equipment of a power system, in particular to a direct mould pressing type composite outer sleeve lightning arrester and a manufacturing method thereof. The direct mould pressing type composite outer sleeve lightning arrester comprises a pressure-resistant support, a resistor disc core body and a silicon rubber umbrella, wherein the pressure-resistant support is a cylindrical component, hollow areas are distributed on the periphery of the pressure-resistant support, the resistor disc core body is assembled between two ends of an inner cavity of the pressure-resistant support, one end of the resistor disc core body is a high-voltage end, the other end of the resistor disc core body is a low-voltage end, and the silicon rubber umbrella is wrapped outside the pressure-resistant support and is in contact with the resistor disc core body through the hollow areas of the pressure-resistant support. The advantages are that: the structure is simple and reasonable, the mechanical strength is high, and the large mechanical load can be borne; the heat dissipation performance is good; has good pressure release performance.
Description
Technical Field
The invention relates to the technical field of power transmission and distribution primary equipment of a power system, in particular to a direct mould pressing type composite outer sleeve lightning arrester and a manufacturing method thereof.
Background
The zinc oxide arrester has excellent nonlinear resistance characteristics, and is widely applied to power systems. The traditional porcelain bushing lightning arrester and the traditional mould pressing composite sheath lightning arrester adopted at present have certain defects in structural formula, and the safety and reliability of the traditional porcelain bushing lightning arrester and the traditional mould pressing composite sheath lightning arrester in operation can be influenced. Plays an important role in ensuring the normal operation of the power system.
When the traditional porcelain bushing lightning arrester breaks down, the air inside the traditional porcelain bushing lightning arrester is heated by high temperature of an electric arc and expands rapidly, and great stress is generated. Although the porcelain insulator lightning arrester is provided with the pressure release device at present, the power system is continuously enlarged, the short-circuit current of the system is continuously increased, and the difficulty of pressure release is increased, so that the vicious accident of explosion of the lightning arrester still happens at times. At present, the requirements of China on the large current of the pressure release action of the station-type lightning arrester with the grade of 10kA and 20kA are 40 kA-63 kA, and the voltage of North America is improved to 100 kA. The lightning arrester explodes to damage other equipment, endangers the safety of operating personnel.
In the traditional process of directly molding the composite housed arrester, the zinc oxide resistance card is usually fixed by adopting an electrician weftless tape winding mode or a Duliton engineering plastic injection molding mode, and the mechanical strength of the zinc oxide resistance card is poor. When the current system has short-circuit fault, the lightning arrester of the type can not bear large short-circuit current, is easy to explode and crack, and damages other surrounding equipment and causes danger to personnel.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a direct mould pressing type composite outer sleeve lightning arrester and a manufacturing method thereof, and the defects of the prior art are effectively overcome.
The technical scheme for solving the technical problems is as follows:
a direct mould pressing type composite outer sleeve lightning arrester comprises a pressure-resistant support, a resistor disc core body and a silicon rubber umbrella, wherein the pressure-resistant support is a cylindrical component, hollow areas are distributed on the periphery of the pressure-resistant support, the resistor disc core body is assembled between two ends of an inner cavity of the pressure-resistant support, one end of the resistor disc core body is a high-voltage end, the other end of the resistor disc core body is a low-voltage end, and the silicon rubber umbrella is wrapped outside the pressure-resistant support and is in contact with the resistor disc core body through the hollow areas of the pressure-resistant support.
The beneficial effects are that: the structure is simple and reasonable, the mechanical strength is high, and the large mechanical load can be borne; the heat dissipation performance is good; has good pressure release performance.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the resistor chip body includes a high-voltage side electrode, a low-voltage side electrode, and a plurality of zinc oxide resistor blocks, the high-voltage side electrode and the low-voltage side electrode are respectively fixed in the two end ports of the voltage-resistant support, the plurality of zinc oxide resistor blocks are arranged in a row and are arranged in the voltage-resistant support, the high-voltage side electrode and the low-voltage side electrode are respectively connected with the zinc oxide resistor blocks at the two ends in a contact manner, and two adjacent zinc oxide resistor blocks are in contact with each other.
The beneficial effect of adopting the further scheme is that: the resistor disc core body is simple in structure and convenient to assemble.
Furthermore, the high-voltage side electrode and the low-voltage side electrode are respectively partially inserted into two end ports of the pressure-resistant support and are respectively assembled and fixed with the pressure-resistant support through bolts, and two ends of the silicon rubber umbrella are respectively wrapped outside the zinc oxide resistance block and the part of the high-voltage side electrode exposed out of the pressure-resistant support.
The beneficial effect of adopting the further scheme is that: the resistor disc core body is firmly assembled integrally.
Furthermore, the resistance chip core body also comprises a conductive metal cushion block, and the metal cushion block is assembled between any two adjacent zinc oxide resistance blocks and is in contact connection with any two adjacent zinc oxide resistance blocks.
The beneficial effect of adopting the further scheme is that: the height of the resistor disc core body can be adjusted by designing the metal cushion block, so that the resistor disc core body is matched with the whole height of the lightning arrester.
The resistance chip core body further comprises a belleville spring, the high-voltage side electrode and the low-voltage side electrode are respectively embedded into the end heads of the pressure-resistant supports, and the high-voltage side electrode and the low-voltage side electrode are respectively connected with the zinc oxide resistance block at the corresponding ends in a pressing mode through the corresponding belleville springs.
The beneficial effect of adopting the further scheme is that: the resistance card core body is assembled more closely and firmly, and the stability is better.
Further, the pressure-resistant support is an epoxy plate member.
The beneficial effect of adopting the further scheme is that: the adoption of the epoxy plate member enables the overall mechanical structure to have higher strength.
The manufacturing method of the direct mould pressing type composite outer sleeve lightning arrester comprises the following steps:
step one, manufacturing the pressure-resistant support according to the zinc oxide resistance block in advance;
step two, manufacturing a mold blank, namely, installing an appropriate number of the zinc oxide resistor blocks into the pressure-resistant support, and assembling the high-voltage side electrode and the low-voltage side electrode at two ends of the pressure-resistant support;
and step three, mould pressing, specifically, putting the mould blank obtained in the step three into a special mould, adopting high-temperature vulcanized rubber to mould press the mould blank outside the resistor chip core, injecting the high-temperature vulcanized rubber into the mould under a set pressure, and vulcanizing the mould blank at a set temperature to form the silicon rubber umbrella.
The beneficial effects are that: the process design is simple, the integrity is better, and the performance of the lightning arrester is good.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, a mold flash hole is formed in the low-voltage side electrode along the longitudinal direction of the pressure-resistant support.
The beneficial effect of adopting the further scheme is that: the design of the mould pressing overflow hole is beneficial to the overflow of vulcanized rubber in the manufacturing process, and excessive silicon rubber is discharged through the mould pressing overflow hole, so that the silicon rubber is prevented from being squeezed between the zinc oxide resistance blocks.
Drawings
Fig. 1 is a schematic structural view of a direct compression molded composite cased lightning arrester according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. pressure-resistant support; 2. a silicone rubber umbrella; 3. a high voltage side electrode; 4. a low voltage side electrode; 5. a zinc oxide resistance block; 6. a metal cushion block; 41. the overflow hole is molded.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the direct-mold composite housed arrester of the present embodiment includes a pressure-resistant support 1, a resistor disc core and a silicon rubber umbrella 2, wherein the pressure-resistant support 1 is a cylindrical member and has hollow areas distributed on the periphery thereof, the resistor disc core is assembled between two ends of an inner cavity of the pressure-resistant support 1, one end of the resistor disc core is a high-voltage end, and the other end of the resistor disc core is a low-voltage end, and the silicon rubber umbrella 2 is wrapped outside the pressure-resistant support 1 and contacts with the resistor disc core through the hollow areas of the pressure-resistant support 1.
In the using process, the high-voltage end of the resistor disc core body is connected with the high voltage of the power system through a wire; the low-voltage end is grounded through a wire, and the whole resistor disc core body is fixed by the pressure-resistant support 1 in the whole structure, so that the whole structure is simple, the mechanical strength is high, and the resistor disc core body can bear larger mechanical load. And, have the following advantage: 1) the heat dissipation performance is good: because the silicon rubber umbrella 2 and the resistance chip core body are in direct contact through the hollow-out area of the pressure-resistant support 1, when overvoltage occurs, the lightning arrester absorbs energy, the resistance chip core body generates heat, the heat can be well dissipated through the silicon rubber umbrella 2, and the overvoltage tolerance of the lightning arrester can be improved. 2) Has good pressure release performance: when power system takes place ground fault, the arrester will bear great short-circuit current, and silicon rubber umbrella 2 is because intensity is lower, and inside energy can be quick tears silicon rubber umbrella 2, falls the inside thermal stress release of arrester, ensures that the arrester can not explode under this kind of operating mode and splits, guarantees that other equipment and staff around the arrester can not receive harm because arrester pressure release.
In a preferred embodiment, the resistive chip core includes a high-voltage side electrode 3, a low-voltage side electrode 4, and a plurality of zinc oxide resistive blocks 5, the high-voltage side electrode 3 and the low-voltage side electrode 4 are respectively fixed to both end ports of the pressure-resistant support 1, the plurality of zinc oxide resistive blocks 5 are arranged in a row and are mounted inside the pressure-resistant support 1, the high-voltage side electrode 3 and the low-voltage side electrode 4 are respectively connected to the zinc oxide resistive blocks 5 located at both ends in contact, and two adjacent zinc oxide resistive blocks 5 are in contact with each other.
In this embodiment, the resistance card core adopts integrated configuration, is convenient for with withstand voltage support 1's assembly, and overall design is reasonable, can come the length (the height) of nimble whole resistance card core of adjustment through increasing zinc oxide resistance block 5.
More specifically, the high-voltage side electrode 3 and the low-voltage side electrode 4 are partially inserted into ports at both ends of the pressure-resistant support 1, the high-voltage side electrode 3 and the low-voltage side electrode 4 are also cylindrical members, and after the high-voltage side electrode 3 and the low-voltage side electrode are partially inserted into corresponding ports of the pressure-resistant support 1, they are respectively assembled and fixed (laterally) with the pressure-resistant support 1 by 2-M8 bolts, and both ends of the silicone rubber umbrella 2 are respectively wrapped around the zinc oxide resistance block 5 and the portion of the high-voltage side electrode 3 exposed out of the pressure-resistant support 1.
As a preferable real-time mode, the resistor chip body further includes a conductive metal spacer 6, and the metal spacer 6 is assembled between any two adjacent zinc oxide resistor blocks 5 and is in contact connection with any two adjacent zinc oxide resistor blocks 5.
In this embodiment, the metal pad 6 is a cylindrical member, and the inner wall of the pressure-resistant support 1 is attached to the periphery of the metal pad, so that the height and the number of the metal pads 6 can be adjusted according to the number of the zinc oxide resistance blocks 5 during use, and the height of the metal pads is matched with the overall height of the lightning arrester.
Generally, one metal spacer 6 may be used, and is disposed in the middle of the plurality of zinc oxide resistor blocks 5.
In a preferred embodiment, the resistive chip core further includes a belleville spring (not shown), the high-voltage side electrode 3 and the low-voltage side electrode 4 are respectively embedded in the end of the pressure-resistant support 1, and the high-voltage side electrode 3 and the low-voltage side electrode 4 are respectively connected to the zinc oxide resistive block 5 at the corresponding ends by pressing via the corresponding belleville springs.
In this embodiment, after the high-voltage side electrode 3 and the low-voltage side electrode 4 at both ends are fixed to the pressure-resistant support 1, the belleville springs at both ends are in a compressed state and act on the two zinc oxide resistance blocks 5 at both ends by elastic force, so that all the zinc oxide resistance blocks 5 are pressed against each other and maintain good contact.
In this embodiment, the pressure-resistant support 1 is an epoxy plate member, and is made of a material having high mechanical strength.
In the design, withstand voltage supports 1 can adopt many epoxy laths that the specification is unanimous, and the cross section of every epoxy lath all designs for fan ring shape, and many epoxy laths interval encircle to distribute on same circumference, and the both ends of every epoxy lath are connected fixedly with the periphery of high pressure side electrode 3 and low pressure side electrode 4 respectively.
Example 2
The manufacturing method of the direct mould pressing type composite outer sleeve lightning arrester comprises the following steps:
firstly, manufacturing the pressure-resistant support 1 in advance according to the zinc oxide resistance block 5;
step two, manufacturing a mold blank, specifically, installing an appropriate number of the zinc oxide resistance blocks 5 into the pressure-resistant support 1, and assembling the high-voltage side electrode 3 and the low-voltage side electrode 4 at two ends of the pressure-resistant support 1;
and step three, mould pressing, specifically, putting the mould blank obtained in the step three into a special mould, adopting high-temperature vulcanized rubber to mould press the mould blank outside the resistor chip core, injecting the high-temperature vulcanized rubber into the mould under a set pressure, and vulcanizing the mould blank at a set temperature to form the silicon rubber umbrella 2.
The process is simple, and the finally formed silicon rubber umbrella 2 is tightly connected with the resistor disc core body and the pressure-resistant support 1 structure by adopting mould pressing, so that the whole lightning arrester is ensured to have good heat dissipation performance.
Preferably, the low voltage side electrode 4 has a mold flash hole 41 formed therethrough along the longitudinal direction of the pressure-resistant support 1.
In the scheme, in the injection molding process, after the high-temperature vulcanized rubber enters the pressure-resistant support 1, excessive silicon rubber can be discharged through the mold pressing overflow hole 41 of the low-voltage side electrode 4, so that the silicon rubber is prevented from being squeezed into the zinc oxide resistance blocks 5 and/or the zinc oxide resistance blocks 5 and the metal cushion block 6.
In the present embodiment, the size of the stamp discharge hole 41 is preferably 4mm in diameter, and two stamp discharge holes 41 are preferably provided on the low-voltage side electrode 4.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," 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 are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. The utility model provides a compound overcoat arrester of direct mould pressing type which characterized in that: including withstand voltage support (1), resistance card core and silicon rubber umbrella (2), withstand voltage support (1) is cylindric component, and the fretwork district is covered with in its periphery, the resistance card core assemble in between the both ends of withstand voltage support (1) inner chamber, and its one end is the high pressure end, and the other end is the low pressure end, silicon rubber umbrella (2) parcel is in withstand voltage support (1) outside, and see through the fretwork district of withstand voltage support (1) with the contact of resistance card core.
2. The direct compression molded composite cased lightning arrester according to claim 1, wherein: the resistance chip core body comprises a high-voltage side electrode (3), a low-voltage side electrode (4) and a plurality of zinc oxide resistance blocks (5), the high-voltage side electrode (3) and the low-voltage side electrode (4) are respectively assembled and fixed in ports at two ends of the pressure-resistant support (1), the zinc oxide resistance blocks (5) are arranged in a row and assembled inside the pressure-resistant support (1), the high-voltage side electrode (3) and the low-voltage side electrode (4) are respectively in contact connection with the zinc oxide resistance blocks (5) at two ends, and the zinc oxide resistance blocks (5) are in contact with each other two adjacent electrodes.
3. The direct compression molded composite cased lightning arrester according to claim 2, wherein: the high-voltage side electrode (3) and the low-voltage side electrode (4) are respectively partially inserted into ports at two ends of the pressure-resistant support (1) and are respectively assembled and fixed with the pressure-resistant support (1) through bolts, and two ends of the silicon rubber umbrella (2) are respectively wrapped on the zinc oxide resistance block (5) and the high-voltage side electrode (3) exposed outside the pressure-resistant support (1).
4. The direct compression molded composite cased lightning arrester according to claim 2, wherein: the resistor chip core body further comprises a conductive metal cushion block (6), and the metal cushion block (6) is assembled between any two adjacent zinc oxide resistor blocks (5) and is in contact connection with any two adjacent zinc oxide resistor blocks (5).
5. The direct compression molded composite housed arrester as claimed in any one of claims 2 to 4, wherein: the resistance chip core body further comprises a belleville spring, the high-voltage side electrode (3) and the low-voltage side electrode (4) are respectively installed in the end of the pressure-resistant support (1), the belleville spring is embedded in the end, and the high-voltage side electrode (3) and the low-voltage side electrode (4) are respectively in compression connection with the zinc oxide resistance block (5) at the corresponding end through the corresponding belleville spring.
6. The direct compression molded composite housed arrester as claimed in any one of claims 2 to 4, wherein: the pressure-resistant support (1) is an epoxy plate component.
7. A method for manufacturing a direct compression molded composite housed arrester as claimed in any one of claims 2 to 6, comprising the steps of:
firstly, manufacturing the pressure-resistant support (1) in advance according to the zinc oxide resistance block (5);
step two, manufacturing a mold blank, specifically, installing an appropriate number of zinc oxide resistance blocks (5) into the pressure-resistant support (1), and assembling the high-voltage side electrode (3) and the low-voltage side electrode (4) at two ends of the pressure-resistant support (1);
and step three, mould pressing, specifically, putting the mould blank obtained in the step three into a special mould, adopting high-temperature vulcanized rubber, mould pressing the mould blank outside the resistance chip core, injecting the high-temperature vulcanized rubber into the mould under a set pressure, and vulcanizing the mould blank at a set temperature to form the silicon rubber umbrella (2).
8. The method of claim 7, wherein the method comprises the steps of: and a mold pressing overflow hole (41) penetrating through the low-voltage side electrode (4) is arranged in the long axis direction of the pressure-resistant support (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111465209.1A CN114360826A (en) | 2021-12-03 | 2021-12-03 | Direct mould pressing type composite outer sleeve lightning arrester and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111465209.1A CN114360826A (en) | 2021-12-03 | 2021-12-03 | Direct mould pressing type composite outer sleeve lightning arrester and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116052970A (en) * | 2022-12-30 | 2023-05-02 | 湖南防灾科技有限公司 | Lightning arrester |
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2021
- 2021-12-03 CN CN202111465209.1A patent/CN114360826A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116052970A (en) * | 2022-12-30 | 2023-05-02 | 湖南防灾科技有限公司 | Lightning arrester |
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