CN115458259A - Lightning arrester and manufacturing method thereof - Google Patents
Lightning arrester and manufacturing method thereof Download PDFInfo
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- CN115458259A CN115458259A CN202211227129.7A CN202211227129A CN115458259A CN 115458259 A CN115458259 A CN 115458259A CN 202211227129 A CN202211227129 A CN 202211227129A CN 115458259 A CN115458259 A CN 115458259A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
- H01C1/032—Housing; Enclosing; Embedding; Filling the housing or enclosure plural layers surrounding the resistive element
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/08—Cooling, heating or ventilating arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/02—Apparatus or processes specially adapted for manufacturing resistors adapted for manufacturing resistors with envelope or housing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/28—Apparatus or processes specially adapted for manufacturing resistors adapted for applying terminals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
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Abstract
The invention relates to a lightning arrester and a preparation method thereof, wherein the lightning arrester comprises an inner core assembly, a thermosetting inner insulating layer and an outer insulating umbrella cover, wherein the inner core assembly comprises electrodes and a resistance component, and two ends of the resistance component are respectively abutted and matched with the two electrodes; the thermosetting inner insulating layer is wrapped outside the inner core assembly, and the end parts of the two electrodes, which are far away from the resistance component, are exposed out of the thermosetting inner insulating layer; the outer insulating umbrella cover wraps the thermosetting inner insulating layer, and two ends of the outer insulating umbrella cover respectively extend to the end parts of the two electrodes exposed out of the thermosetting inner insulating layer; the thermosetting inner insulating layer of the lightning arrester can reliably fix and support the inner core component, provides reliable mechanical performance for the lightning arrester, does not need to be perforated and threaded in the assembling process, does not relate to spring coupling, and the type and the quantity of the parts required by the lightning arrester assembly are small, so that the assembling difficulty is low, the assembling process flow is simplified, the automatic production is facilitated, the production efficiency is improved, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of lightning arrester manufacturing, in particular to a lightning arrester and a manufacturing method thereof.
Background
The composite-casing gapless metal oxide arrester refers to a gapless metal oxide arrester with a polymer or composite material as a casing, the common casing is made of silicon rubber and FRP composite materials, the weight of the composite-casing gapless metal oxide arrester is far lower than that of a porcelain-casing arrester, the composite-casing gapless metal oxide arrester is easy to carry in the transportation and installation processes, and the composite-casing gapless metal oxide arrester is generally applied to line protection.
The tubular structure is a typical structure applied to a low-voltage-level composite outer sleeve lightning arrester, the resistance chip is directly installed in the insulating tube and is pressed tightly by the spring, the two ends of the insulating tube are connected with the metal end blocks, and the outer portion of the assembled core body is integrally molded with the silicone rubber outer sleeve in one step.
The common form of the tubular structure is to machine threads on the inner surfaces of two ends of the epoxy glass fiber insulating tube, match the threads on the electrodes for assembly, or inject and mold thermoplastic materials such as Du Lidu and the like on the resistance sheet cylinder to form a core body. The former has the disadvantages of complex related parts, high assembly difficulty, high raw material cost and long production period, and the heat dissipation efficiency of the product is greatly influenced due to the air gap between the insulating tube and the resistance sheet piece; the latter has poor heat resistance due to the inherent high-temperature softening property of thermoplastic materials, is easy to age and deform after long-term online operation, and has insufficient overall stability and reliability of products.
Disclosure of Invention
One of the objectives of the present invention is to provide a lightning arrester, so that the lightning arrester has stable and reliable mechanical performance, reduces the types and the number of parts required for assembling, reduces the assembling difficulty, facilitates the automatic production, and reduces the cost.
Another object of the present invention is to provide a method for manufacturing the above lightning arrester.
In order to achieve the purpose, the invention provides the following technical scheme:
an arrester, comprising:
the inner core assembly comprises electrodes and a resistance component, and two ends of the resistance component are respectively abutted and matched with the two electrodes;
the thermosetting inner insulating layer is wrapped outside the inner core assembly, and the end parts, far away from the resistance component, of the two electrodes are exposed out of the thermosetting inner insulating layer;
the outer insulation umbrella cover, outer insulation umbrella cover wrap up in outside the thermosetting internal insulation layer, just the both ends of outer insulation umbrella cover extend to two respectively the electrode expose in the tip of thermosetting internal insulation layer.
Optionally, the resistance member is a resistance rod, and the height-diameter ratio of the resistance rod is more than 2;
alternatively, the resistance member is formed by stacking a plurality of resistance sheets with the height-diameter ratio smaller than 2.
Optionally, the cross-sectional shape of the resistance rod or the resistance sheet is circular or polygonal.
Optionally, the core assembly further comprises a tuning shim having a cross-sectional shape identical to a cross-sectional shape of the resistive member, one or more tuning shims for being disposed between the electrode and the resistive member to maintain a uniform height of each of the core assemblies.
Optionally, gaps in the contact surfaces of the components of the core assembly are filled with a conductive filling layer.
Optionally, the conductive filling layer is a conductive adhesive layer or a sponge metal sheet.
Optionally, the inner core assembly further comprises a fixing sleeve, the end of the electrode contacting the resistance member and the resistance member are wrapped inside the fixing sleeve, and the fixing sleeve relatively fixes the two electrodes and the resistance member.
Optionally, the securing sleeve is a heat shrink sleeve.
Optionally, the electrode includes an abutting portion, a neck portion, a waist portion and an exposed portion, which are connected in sequence, the abutting portion is in abutting fit with the resistance member, the cross-sectional shape of the abutting portion is the same as that of the resistance member, the cross-sectional area of the neck portion is smaller than that of the abutting portion and that of the waist portion, the cross-sectional area of the waist portion is larger than that of the abutting portion, the cross-sectional area of the exposed portion is larger than that of the waist portion, the exposed portion is exposed out of the outer insulating umbrella cover, the neck portion and the abutting portion are wrapped in the thermosetting inner insulating layer, and the waist portion is wrapped in the outer insulating umbrella cover.
Optionally, the neck portion and the thermosetting inner insulation layer are in a positive fit to limit the freedom of relative rotation therebetween.
Optionally, an annular clamping groove is formed between the waist and the exposed part, an annular boss is arranged at the end of the outer insulating umbrella cover, and the end of the outer insulating umbrella cover is clamped in the annular clamping groove between the waist and the exposed part through the annular boss.
Optionally, the thermosetting inner insulating layer is provided with a hollowed explosion-proof hole.
Optionally, a plurality of the explosion-proof holes are uniformly distributed along the circumferential direction of the thermosetting inner insulating layer.
A method for producing an arrester, for producing the arrester as described in the above item 5 or 6, comprising the steps of:
(1) Placing a resistance component and two electrodes of an inner core assembly of the lightning arrester on an operation platform in sequence according to the inner core assembly;
(2) Filling a conductive filling layer in a gap of a contact surface between the electrode and the resistance component;
(3) Applying pressure on the two electrodes along the axial direction of the inner core assembly by using a pressing tool so that the two electrodes and the resistance component are tightly contacted and relatively fixed;
(4) Placing the inner core assembly into a packaging mold, and molding a thermosetting inner insulating layer outside the inner core assembly through an injection molding or mould pressing process;
(5) And injecting and vulcanizing the thermosetting inner insulating layer to form the outer insulating umbrella cover.
Optionally, the step (1) specifically includes:
(101) Placing a resistance component and two electrodes of an inner core assembly of the lightning arrester on an operation table in sequence according to the inner core assembly;
(102) Measuring the length of the inner core assembly, if the length of the inner core assembly accords with the preset length of the inner core assembly, entering the step (2), if the length of the inner core assembly does not accord with the preset length of the inner core assembly, adjusting the length of the inner core assembly in a mode of placing an adjusting gasket between the electrode and the resistance component or adjusting the length of the resistance component until the length of the inner core assembly accords with the preset length, and entering the step (2).
A method for producing an arrester, for producing the arrester as described in item 7 above, comprising the steps of:
(1) Placing a resistance component and two electrodes of an inner core assembly of the lightning arrester on an operation table in sequence according to the inner core assembly;
(2) Fixing sleeves are sleeved outside the end part of the electrode, which is in contact with the resistance member, and the two electrodes and the resistance member are relatively fixed by the fixing sleeves;
(3) Placing the inner core assembly into a packaging mold, and molding a thermosetting inner insulating layer outside the inner core assembly through an injection molding or mould pressing process;
(4) And injecting and vulcanizing the thermosetting inner insulating layer to form the outer insulating umbrella cover.
Optionally, the step (1) specifically includes:
(101) Placing a resistance component and two electrodes of an inner core assembly of the lightning arrester on an operation table in sequence according to the inner core assembly;
(102) Measuring the length of the inner core assembly, if the length of the inner core assembly accords with the preset length of the inner core assembly, entering the step (2), if the length of the inner core assembly does not accord with the preset length of the inner core assembly, adjusting the length of the inner core assembly in a mode of placing an adjusting gasket between the electrode and the resistance component or adjusting the length of the resistance component until the length of the inner core assembly accords with the preset length, and entering the step (2).
Optionally, if the fixing sleeve is a heat-shrinkable sleeve, the step (2) specifically includes:
(201) Sleeving the heat-shrinkable sleeve outside the inner core assembly, wherein two ends of the heat-shrinkable sleeve exceed the end parts of the electrodes, which are in contact with the resistance component;
(202) And heating the heat-shrinkable sleeve by using a heating device, so that the heat-shrinkable sleeve is shrunk and wrapped outside the inner core assembly to relatively fix the resistance member and the two electrodes.
According to the technical scheme, the invention discloses a lightning arrester which comprises an inner core assembly, a thermosetting inner insulating layer and an outer insulating umbrella cover, wherein the inner core assembly comprises electrodes and a resistance component, and two ends of the resistance component are respectively abutted and matched with the two electrodes; the thermosetting inner insulating layer is wrapped outside the inner core assembly, and the end parts of the two electrodes, which are far away from the resistance component, are exposed out of the thermosetting inner insulating layer; the outer insulating umbrella cover wraps the thermosetting inner insulating layer, and two ends of the outer insulating umbrella cover respectively extend to the end parts of the two electrodes exposed out of the thermosetting inner insulating layer; the lightning arrester is characterized in that a thermosetting inner insulating layer is directly arranged outside the inner core component, the thermosetting material has the characteristics of high temperature resistance, corrosion resistance, high mechanical strength, low contractibility, excellent insulativity and flame retardance, the thermosetting inner insulating layer can be directly formed outside the inner core component in an injection molding or die pressing mode, the close contact fit with the inner core component is realized, a gap between the thermosetting inner insulating layer and the inner core component is prevented, a stable and reliable connecting structure between an electrode and a resistance member can be ensured, the inner core component can be reliably fixed and supported, the heat dissipation efficiency is ensured, a force bearing part of the lightning arrester is provided, the reliable mechanical performance is provided for the lightning arrester, the defect that the thermal stability of thermoplastic materials such as Du Lidu and the like is poor in the operation process is effectively overcome, the requirements of the lightning arrester product on the mechanical strength and the electrical performance can be better met, meanwhile, the connection of each part of the inner core component and the forming of the inner insulating layer are directly realized in the injection molding or the thermosetting inner insulating layer outside the inner core component, holes and threads do not need to be drilled and processed in the assembly process, the spring connection is not involved, the type and the parts and the assembly process is low, the assembly process is favorable for simplifying the automatic production cost reduction.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a longitudinal sectional view of a lightning arrester according to an embodiment of the present invention;
fig. 2 is a schematic structural view of an assembled inner core assembly and a thermosetting inner insulating layer of the arrester according to the embodiment of the present invention;
FIG. 3 is a cross-sectional view of FIG. 2;
fig. 4 is a longitudinal sectional view of an electrode of a lightning arrester according to an embodiment of the present invention;
fig. 5 is a cross-sectional view of an electrode of a lightning arrester at a neck portion according to an embodiment of the present invention.
In the figure:
1 is an electrode; 101 is an abutting part; 102 is a neck; 103 is waist; 104 is an exposed part; 2 is an adjusting gasket; 3 is a conductive filling layer; 4 is a resistance member; 5 is a fixed sleeve; 6 is a thermosetting inner insulating layer; 601 is an explosion-proof hole; and 7, an external insulation umbrella cover.
Detailed Description
The invention provides a lightning arrester, which has stable and reliable mechanical performance due to the structural design, reduces the types and the number of parts required by assembly, reduces the assembly difficulty, facilitates the automatic production and reduces the cost.
The other core of the invention is to provide a method for preparing the lightning arrester.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a longitudinal sectional view of a lightning arrester according to an embodiment of the present invention.
The embodiment of the invention discloses an arrester, which comprises an inner core assembly, a thermosetting inner insulating layer 6 and an outer insulating umbrella cover 7.
The inner core assembly comprises electrodes 1 and a resistance component 4, two ends of the resistance component 4 are respectively matched with the two electrodes 1 in an abutting mode, and the resistance component 4 is made of a semiconductor ceramic material; the thermosetting inner insulating layer 6 is wrapped outside the inner core assembly, the end parts of the two electrodes 1 far away from the resistance member 4 are exposed out of the thermosetting inner insulating layer 6, the thermosetting inner insulating layer 6 is made of Fiber Reinforced composite (FRP), specifically, the Fiber Reinforced composite is Bulk Molding Compound (BMC), sheet Molding Compound (SMC) or epoxy resin glass Fiber, preferably, the material is a low-cost BMC material, and the material has short molding cycle and stable molding quality in an injection molding process; the outer insulating umbrella cover 7 is wrapped outside the thermosetting inner insulating layer 6, and two ends of the outer insulating umbrella cover 7 respectively extend to the end parts of the two electrodes 1 exposed out of the thermosetting inner insulating layer 6.
Compared with the prior art, the lightning arrester provided by the embodiment of the invention directly arranges the thermosetting inner insulating layer 6 outside the inner core component, the thermosetting inner insulating layer 6 is made of thermosetting materials, the thermosetting materials have the characteristics of high temperature resistance, corrosion resistance, high mechanical strength, low shrinkage, excellent insulativity and flame retardance, and the like, the thermosetting inner insulating layer 6 can be directly formed outside the inner core component in an injection molding or die pressing mode to realize close contact and matching with the inner core component, so that a gap between the thermosetting inner insulating layer 6 and the inner core component is prevented, a stable and reliable connecting structure can be formed between the electrode 1 and the resistance member 4, reliable fixing and supporting can be formed for the inner core component, the heat dissipation efficiency is ensured, the lightning arrester is a force bearing part, reliable mechanical performance is provided for the lightning arrester, the defect that the thermal stability of thermoplastic materials such as Du Lidu is poor in the operation process is effectively avoided, the requirements of the lightning arrester on the mechanical strength and the electrical performance can be better met, meanwhile, the requirements of the lightning arrester on the mechanical strength and the inner insulating layer can be directly realized by the injection molding or die pressing of the inner insulating layer 6, the connecting process of the inner core component and the spring can be better met, the requirements of the production process of the lightning arrester can be reduced, the production process of the assembly, the production process is reduced, and the production cost is reduced, and the production of the assembly is also is facilitated, and the production process is reduced, and the production of the lightning arrester is reduced.
The resistance component 4 can adopt an integrated structure, namely the resistance component 4 is a resistance rod with a rod-shaped structure, the height-diameter ratio of the resistance rod is more than 2, and the height-diameter ratio refers to the ratio of the height of the resistance rod to the cross section circular diameter or the circumscribed circle diameter of the cross section shape of the resistance rod; the resistance member 4 may be a separate structure, that is, the resistance member 4 is formed by stacking a plurality of resistance sheets with an aspect ratio smaller than 2.
Preferably, the cross section of the resistance rod or the resistance sheet is circular or polygonal, and the polygon can be rectangular, square, triangular and the like.
In the manufacturing process of the inner core assembly, due to the existence of tolerance, the lengths of the inner core assemblies are different, in order to ensure that the lengths of the inner core assemblies are consistent, the inner core assembly further comprises an adjusting gasket 2, the cross-sectional shape of the adjusting gasket 2 is the same as that of the resistance member 4, one or more adjusting gaskets 2 are arranged between the electrode 1 and the resistance member 4 so as to keep the heights of the inner core assemblies consistent, when the length of the inner core assembly does not meet preset requirements, for example, the actual length of the inner core assembly is smaller than the preset length, the adjusting gasket 2 can be arranged between the electrode 1 and the resistance member 4 for adjustment, one or more adjusting gaskets 2 can be arranged between the electrode 1 and the resistance member 4, the electrode 1 is in contact with the resistance member 4 through the adjusting gasket 2, when a plurality of adjusting gaskets 2 are arranged, the thicknesses of the adjusting gaskets 2 can be the same or different, and if the actual length of the inner core assembly is equal to the preset length, the adjusting gasket 2 does not need to be arranged, the electrode 1 is in direct contact with the resistance member 4, and when the actual length of the inner core assembly is larger than the preset length, the resistance member 4 needs to be replaced or the resistance member 4 needs to be reprocessed.
In the embodiment of the present invention, the adjusting pad 2 is an aluminum pad.
In the embodiment of the present invention, the thermosetting inner insulating layer 6 needs to be formed outside the inner core assembly by injection molding or die pressing, and there inevitably exists a gap between the components of the inner core assembly, so that in order to prevent the thermosetting material from entering the gap between the components of the inner core assembly during the injection molding or die pressing process to affect the electrical communication of the inner core assembly, the inner core assembly can be protected by the following two ways.
One of them is to fill the conductive filling layer 3 in the gap in the contact surface of each component of the inner core assembly, this conductive filling layer 3 can effectively fill the gap between each component of the inner core assembly, thereby avoid thermosetting material to get into the gap between each component of the inner core assembly in the process of injection molding or mould pressing, when the inner core assembly does not adopt the adjusting shim 2, this conductive filling layer 3 is directly filled between electrode 1 and resistance component 4, when the inner core assembly adopts the adjusting shim 2, the conductive filling layer 3 is filled between electrode 1 and adjusting shim 2, between each adjusting shim 2 and between resistance component 4 and adjusting shim 2.
Preferably, the conductive filling layer 3 is a conductive adhesive layer or a sponge metal sheet.
Another is to arrange a fixing sleeve 5 outside the inner core assembly, as shown in fig. 1 to 3, the end of the electrode 1 contacting with the resistance member 4 and the resistance member 4 are wrapped by the fixing sleeve 5, the fixing sleeve 5 relatively fixes the two electrodes and the resistance member 4, the fixing sleeve 5 is used to protect the joint of the electrode 1 and the resistance member 4, if the adjusting gasket 2 is arranged between the electrode 1 and the resistance member 4, the fixing sleeve 5 also wraps the adjusting gasket 2, the fixing sleeve 5 is used to protect the inner core assembly, and the thermosetting material is prevented from entering gaps between the components of the inner core assembly in the injection molding or die pressing process.
Preferably, the fixing sleeve 5 is a heat shrinkable sleeve, which has the property of shrinking when heated, and can be shrunk and wrapped on the core assembly when heated, so as to achieve a good protection effect, and can be easily assembled on the core assembly.
As shown in fig. 4, the electrode 1 includes an abutting portion 101, a neck portion 102, a waist portion 103, and an exposed portion 104, which are connected in sequence, the abutting portion 101 abuts against and engages with the resistance member 4, a cross-sectional shape of the abutting portion 101 is the same as a cross-sectional shape of the resistance member 4, a cross-sectional area of the neck portion 102 is smaller than cross-sectional areas of the abutting portion 101 and the waist portion 103, a cross-sectional area of the waist portion 103 is larger than a cross-sectional area of the abutting portion 101, a cross-sectional area of the exposed portion 104 is larger than a cross-sectional area of the waist portion 103, the exposed portion 104 is exposed out of the outer insulating umbrella cover 7, the neck portion 102 and the abutting portion 101 are wrapped in the thermosetting inner insulating layer 6, and the waist portion 103 is wrapped in the outer insulating umbrella cover 7.
Preferably, the neck 102 is a positive fit with the thermosetting inner insulating layer 6 to limit the freedom of relative rotation between the two, as shown in fig. 5. In one embodiment of the invention, the cross-sectional shape of the neck 102 is a chamfered rectangle.
As shown in fig. 1, annular clamping groove is formed between waist 103 and the exposed part 104 of electrode 1, the tip of external insulation umbrella cover 7 sets up annular boss, the tip of external insulation umbrella cover 7 passes through annular boss joint in waist 103 and the annular clamping groove between the exposed part 104, be connected with annular clamping groove through annular boss between the tip of electrode 1 and external insulation umbrella cover 7, not only improve the stability of being connected between external insulation umbrella cover 7 and the electrode, can also play sealed effect, the good sealing performance of arrester has been guaranteed.
Further optimizing the above technical solution, the thermosetting inner insulating layer 6 is provided with a hollowed explosion-proof hole 601, an outer opening of the explosion-proof hole 601 is coplanar with an outer circumferential surface of the thermosetting inner insulating layer 6, an inner opening of the explosion-proof hole 601 is coplanar with an inner circumferential surface of the thermosetting inner insulating layer 6, and the fixing sleeve 5 or the inner core assembly is exposed and visible through the explosion-proof hole 601, as shown in fig. 2, the explosion-proof hole 601 enables the internal pressure of the lightning arrester in the energy release process to be effectively guided and released to the outside through the explosion-proof hole 601, thereby avoiding the possibility of occurrence of crushing damage in the thermoplastic structural product, and greatly improving the safety and the usability thereof.
Further optimizing the technical scheme, as shown in fig. 2, a plurality of explosion-proof holes 601 are uniformly distributed along the circumferential direction of the thermosetting inner insulating layer 6.
The embodiment of the invention also provides a preparation method of the arrester, which is used for preparing the arrester without the fixed sleeve 5 structure, and the preparation method comprises the following steps:
s1: placing a resistance component 4 of an inner core assembly of the lightning arrester and two electrodes 1 on an operation platform in sequence according to the composition sequence of the inner core assembly;
s2: filling a conductive filling layer 3 in a gap of a contact surface between the electrode 1 and the resistance member 4;
s3: applying pressure on the two electrodes 1 along the axial direction of the inner core assembly by using a pressing tool to tightly contact and relatively fix the two electrodes 1 and the resistance component 4;
s4: placing the inner core assembly into a packaging mold, and molding the thermosetting inner insulating layer 6 outside the inner core assembly by an injection molding or mould pressing process;
s5: an outer insulating shroud 7 is injected and vulcanised over the thermosetting inner insulating layer 6.
The step S1 specifically includes:
s101: placing a resistance component 4 of an inner core assembly of the lightning arrester and two electrodes 1 on an operation table in sequence according to the inner core assembly;
s102: measuring the length of the inner core assembly, if the length of the inner core assembly accords with the preset length of the inner core assembly, entering step S2, if the length of the inner core assembly does not accord with the preset length of the inner core assembly, adjusting the length of the inner core assembly by placing an adjusting gasket 2 between the electrode 1 and the resistance component 4 or adjusting the length of the resistance component 4 until the length of the inner core assembly accords with the preset length, and entering step S2.
The embodiment of the invention also provides another preparation method of the arrester, which is used for preparing the arrester with the fixing sleeve 5, and the preparation method comprises the following steps:
s1: placing a resistance component 4 of an inner core assembly of the lightning arrester and two electrodes 1 on an operation table in sequence according to the inner core assembly;
s2: a fixing sleeve 5 is sleeved outside the end part of the electrode 1 contacted with the resistance member 4 and the resistance member 4, and the two electrodes and the resistance member 4 are relatively fixed by the fixing sleeve 5;
s3: placing the inner core assembly into a packaging mold, and molding the thermosetting inner insulating layer 6 outside the inner core assembly by an injection molding or mould pressing process;
s4: an outer insulating shroud 7 is injected and vulcanised over the thermosetting inner insulating layer 6.
The step S1 specifically includes:
s101: placing a resistance component 4 of an inner core assembly of the lightning arrester and two electrodes 1 on an operation table in sequence according to the inner core assembly;
s102: measuring the length of the inner core assembly, if the length accords with the preset length of the inner core assembly, entering step S2, if the length does not accord with the preset length of the inner core assembly, adjusting the length of the inner core assembly by placing an adjusting gasket 2 between the electrode 1 and the resistance member 4 or adjusting the length of the resistance member 4 until the length of the inner core assembly accords with the preset length, and then entering step S2.
The fixing sleeve 5 is a heat shrinkable sleeve, and the step S2 specifically includes:
s201: sleeving a heat-shrinkable sleeve outside the inner core assembly, wherein two ends of the heat-shrinkable sleeve exceed the end parts of the electrodes 1, which are in contact with the resistance component 4;
s202: and (3) heating the heat-shrinkable sleeve by using a heating device, so that the heat-shrinkable sleeve is tightly wrapped outside the inner core assembly to relatively fix the resistance member 4 and the two electrodes 1.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It should be understood that the use of "system," "device," "unit," and/or "module" herein is merely one way to distinguish between different components, elements, components, parts, or assemblies of different levels. However, other words may be substituted by other expressions if they accomplish the same purpose.
As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements. An element defined by the phrase "comprising a … …" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
Wherein in the description of the embodiments of the present application, "/" indicates an inclusive meaning, for example, a/B may indicate a or B; "and/or" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two.
In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood 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 one or more of that feature.
If used in this application, the flowcharts are intended to illustrate operations performed by the system according to embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, the various steps may be processed in reverse order or simultaneously. Meanwhile, other operations may be added to or removed from these processes.
It is also noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in an article or apparatus that comprises the element.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (18)
1. An arrester, comprising:
the inner core assembly comprises electrodes and a resistance component, and two ends of the resistance component are respectively in butt fit with the two electrodes;
the thermosetting inner insulating layer is wrapped outside the inner core assembly, and the end parts, far away from the resistance component, of the two electrodes are exposed out of the thermosetting inner insulating layer;
the outer insulation umbrella cover, outer insulation umbrella cover wrap up in outside the thermosetting internal insulation layer, just the both ends of outer insulation umbrella cover extend to two respectively the electrode expose in the tip of thermosetting internal insulation layer.
2. A surge arrester as claimed in claim 1, wherein the resistive member is a resistive rod having a height to diameter ratio of greater than 2;
alternatively, the resistance member is formed by stacking a plurality of resistance sheets with the height-diameter ratio smaller than 2.
3. An arrester according to claim 2, characterized in that the cross-sectional shape of the resistor rod or the resistor disc is circular or polygonal.
4. The surge arrester of any of claims 1-3 wherein the core assembly further comprises a tuning shim having a cross-sectional shape that is the same as the cross-sectional shape of the resistive member, one or more of the tuning shims being adapted to be disposed between the electrode and the resistive member to maintain a uniform height of each of the core assemblies.
5. A surge arrester according to any of claims 1-3, characterized in that the gaps in the contact surfaces of the components of the core assembly are filled with a conductive filler layer.
6. A lightning arrester according to claim 5 characterized in that the conductive filler layer is a layer of conductive glue or a sheet of spongy metal.
7. The arrester of any of claims 1-3 wherein said core assembly further comprises a retaining sleeve, the ends of said electrodes in contact with said resistive member and said resistive member being encased by said retaining sleeve, said retaining sleeve relatively securing said two electrodes and said resistive member.
8. An arrester according to claim 7, characterized in that the retaining sleeve is a heat shrink.
9. The arrester according to any one of claims 1 to 3, 6 and 8, wherein the electrode comprises an abutting portion, a neck portion, a waist portion and an exposed portion, the abutting portion is abutted and matched with the resistance member, the abutting portion has a cross section with a shape identical to that of the resistance member, the cross section of the neck portion is smaller than that of the abutting portion and that of the waist portion, the cross section of the waist portion is larger than that of the abutting portion, the cross section of the exposed portion is larger than that of the waist portion, the exposed portion is exposed out of the outer insulating umbrella cover, the neck portion and the abutting portion are wrapped in the thermosetting inner insulating layer, and the waist portion is wrapped in the outer insulating umbrella cover.
10. A surge arrester as claimed in claim 9 wherein the neck portion and the thermosetting inner insulating layer are profiled to limit the freedom of relative rotation therebetween.
11. The arrester of claim 9 wherein an annular slot is formed between the waist and the exposed portion, an annular boss is provided at an end of the outer insulating shroud, and the end of the outer insulating shroud is clamped in the annular slot between the waist and the exposed portion by the annular boss.
12. A lightning arrester according to any one of claims 1-3, 6, 8, 10 and 11 characterized in that the thermosetting inner insulating layer is provided with hollowed-out explosion-proof holes.
13. A lightning arrester according to claim 12, characterized in that a plurality of said blast-proof holes are uniformly distributed along the circumference of said thermosetting inner insulating layer.
14. A method for producing an arrester according to claim 5 or 6, characterized by comprising the steps of:
(1) Placing a resistance component and two electrodes of an inner core assembly of the lightning arrester on an operation table in sequence according to the inner core assembly;
(2) Filling a conductive filling layer in a gap of a contact surface between the electrode and the resistance component;
(3) Applying pressure on the two electrodes along the axial direction of the inner core assembly by using a pressing tool so that the two electrodes and the resistance component are tightly contacted and relatively fixed;
(4) Placing the inner core assembly into a packaging mold, and forming a thermosetting inner insulating layer outside the inner core assembly by an injection molding or mould pressing process;
(5) And injecting and vulcanizing the thermosetting inner insulating layer to form the outer insulating umbrella cover.
15. A method for producing a lightning arrester according to claim 14, characterized in that the step (1) specifically comprises:
(101) Placing a resistance component and two electrodes of an inner core assembly of the lightning arrester on an operation table in sequence according to the inner core assembly;
(102) Measuring the length of the inner core assembly, if the length of the inner core assembly accords with the preset length of the inner core assembly, entering the step (2), if the length of the inner core assembly does not accord with the preset length of the inner core assembly, adjusting the length of the inner core assembly in a mode of placing an adjusting gasket between the electrode and the resistance component or adjusting the length of the resistance component until the length of the inner core assembly accords with the preset length, and entering the step (2).
16. A method for producing an arrester according to claim 7, characterized by comprising the steps of:
(1) Placing a resistance component and two electrodes of an inner core assembly of the lightning arrester on an operation table in sequence according to the inner core assembly;
(2) Fixing sleeves are sleeved on the end parts of the electrodes, which are in contact with the resistance component, and the two electrodes and the resistance component are relatively fixed by the fixing sleeves;
(3) Placing the inner core assembly into a packaging mold, and molding a thermosetting inner insulating layer outside the inner core assembly through an injection molding or mould pressing process;
(4) And injecting and vulcanizing the thermosetting inner insulating layer to form the outer insulating umbrella cover.
17. A method for producing a lightning arrester according to claim 16, characterized in that the step (1) specifically comprises:
(101) Placing a resistance component and two electrodes of an inner core assembly of the lightning arrester on an operation table in sequence according to the inner core assembly;
(102) Measuring the length of the inner core assembly, if the length of the inner core assembly accords with the preset length of the inner core assembly, entering the step (2), if the length of the inner core assembly does not accord with the preset length of the inner core assembly, adjusting the length of the inner core assembly in a mode of placing an adjusting gasket between the electrode and the resistance component or adjusting the length of the resistance component until the length of the inner core assembly accords with the preset length, and entering the step (2).
18. A method for preparing an arrester according to claim 16, wherein the fixing sleeve is a heat-shrinkable sleeve, and the step (2) specifically comprises:
(201) Sleeving the heat-shrinkable sleeve outside the inner core assembly, wherein two ends of the heat-shrinkable sleeve exceed the end parts of the electrodes, which are in contact with the resistance component;
(202) And heating the heat-shrinkable sleeve by using a heating device, so that the heat-shrinkable sleeve is shrunk and wrapped outside the inner core assembly to relatively fix the resistance member and the two electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211227129.7A CN115458259A (en) | 2022-10-09 | 2022-10-09 | Lightning arrester and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211227129.7A CN115458259A (en) | 2022-10-09 | 2022-10-09 | Lightning arrester and manufacturing method thereof |
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| CN115458259A true CN115458259A (en) | 2022-12-09 |
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| CN202211227129.7A Pending CN115458259A (en) | 2022-10-09 | 2022-10-09 | Lightning arrester and manufacturing method thereof |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2146046Y (en) * | 1992-08-13 | 1993-11-10 | 陈约维 | Synthetic insulating zinc oxide non-clearance arrester |
| CN1614722A (en) * | 2004-11-29 | 2005-05-11 | 贾民 | Composite insulative metal oxide lightning arrester and producing method thereof |
| CN201191547Y (en) * | 2008-03-14 | 2009-02-04 | 武汉雷泰电力科技发展有限公司 | 35kV tapper shape supporting column type composite sleeve gapless metal-oxide lighting arrester |
| JP2012099616A (en) * | 2010-11-01 | 2012-05-24 | Mitsubishi Electric Corp | Arrester and manufacturing method thereof |
| CN103000322A (en) * | 2012-12-05 | 2013-03-27 | 中国西电电气股份有限公司 | Forming method of high-voltage polymeric housed lightning arrester |
| CN203503407U (en) * | 2013-10-30 | 2014-03-26 | 浙江永固电缆附件有限公司 | Explosion-proof type lightning arrester |
| CN109859943A (en) * | 2019-03-29 | 2019-06-07 | 江苏神马电力股份有限公司 | A kind of sheath assembly and bushing shell for transformer being homogenized electric field |
| CN114783709A (en) * | 2022-04-13 | 2022-07-22 | 西安西电避雷器有限责任公司 | Lightning arrester, electrode fixing structure and lightning arrester manufacturing method |
-
2022
- 2022-10-09 CN CN202211227129.7A patent/CN115458259A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2146046Y (en) * | 1992-08-13 | 1993-11-10 | 陈约维 | Synthetic insulating zinc oxide non-clearance arrester |
| CN1614722A (en) * | 2004-11-29 | 2005-05-11 | 贾民 | Composite insulative metal oxide lightning arrester and producing method thereof |
| CN201191547Y (en) * | 2008-03-14 | 2009-02-04 | 武汉雷泰电力科技发展有限公司 | 35kV tapper shape supporting column type composite sleeve gapless metal-oxide lighting arrester |
| JP2012099616A (en) * | 2010-11-01 | 2012-05-24 | Mitsubishi Electric Corp | Arrester and manufacturing method thereof |
| CN103000322A (en) * | 2012-12-05 | 2013-03-27 | 中国西电电气股份有限公司 | Forming method of high-voltage polymeric housed lightning arrester |
| CN203503407U (en) * | 2013-10-30 | 2014-03-26 | 浙江永固电缆附件有限公司 | Explosion-proof type lightning arrester |
| CN109859943A (en) * | 2019-03-29 | 2019-06-07 | 江苏神马电力股份有限公司 | A kind of sheath assembly and bushing shell for transformer being homogenized electric field |
| CN114783709A (en) * | 2022-04-13 | 2022-07-22 | 西安西电避雷器有限责任公司 | Lightning arrester, electrode fixing structure and lightning arrester manufacturing method |
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