CN113922320B - Overvoltage protection combined lightning arrester of power system - Google Patents
Overvoltage protection combined lightning arrester of power system Download PDFInfo
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- CN113922320B CN113922320B CN202111272847.1A CN202111272847A CN113922320B CN 113922320 B CN113922320 B CN 113922320B CN 202111272847 A CN202111272847 A CN 202111272847A CN 113922320 B CN113922320 B CN 113922320B
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- 238000007789 sealing Methods 0.000 claims abstract description 187
- 229920005989 resin Polymers 0.000 claims abstract description 60
- 239000011347 resin Substances 0.000 claims abstract description 60
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims abstract description 36
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 239000012212 insulator Substances 0.000 claims description 20
- 239000004020 conductor Substances 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 4
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 210000001163 endosome Anatomy 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000002952 polymeric resin Substances 0.000 claims description 3
- 229920003002 synthetic resin Polymers 0.000 claims description 3
- 229920005992 thermoplastic resin Polymers 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 230000003647 oxidation Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000009991 scouring Methods 0.000 abstract description 3
- 238000003475 lamination Methods 0.000 description 10
- 230000032683 aging Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
- H02G13/80—Discharge by conduction or dissipation, e.g. rods, arresters, spark gaps
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermistors And Varistors (AREA)
Abstract
The invention discloses an overvoltage protection combined lightning arrester of a power system, wherein annular grooves are formed in an upper electrode and a lower electrode, and an annular sealing mechanism is arranged in each annular groove, is arranged between each annular groove and an inner insulating sealing layer in a sealing manner, and the outer wall of each annular sealing mechanism is tightly attached between the upper electrode or the lower electrode and the inner insulating sealing layer in a heat attaching manner, so that the heat attaching capability and effect of the inner part of the annular sealing mechanism can be effectively improved, the service life is prolonged, and the problem of oxidation caused by rainwater scouring due to cracking or cracks in the using process is prevented; according to the invention, an eddy current local heating mode is adopted, so that non-contact heating is carried out from the inside during hot bonding, the capability of a bonding position is effectively improved by heating the annular iron ring, the upper electrode and the lower electrode, and compared with bonding by heating materials such as resin, the bonding degree can be effectively ensured, and the bonding capability is improved.
Description
Technical Field
The invention particularly relates to an overvoltage protection combined lightning arrester of an electric power system, and relates to the relevant field of lightning protection equipment.
Background
At present, as for the conventional lightning protection device, as shown in fig. 1, the general structure generally mainly includes an upper electrode 2, a lower electrode 6, a resistor 3, an insulator 5, a connection fixing portion 1 and an inner insulating sealing layer 4, wherein the upper electrode 2 and the lower electrode 6 are respectively connected to the upper end and the lower end of the resistor 3, the connection fixing portion 1 is connected to both the lower end of the lower electrode and the upper end of the upper electrode, the inner insulating sealing layer 4 is sleeved outside the upper electrode, the resistor and the lower electrode for sealing, and then the insulator 5 is formed outside the inner insulating sealing layer 4.
Disclosure of Invention
Therefore, in order to solve the above-mentioned disadvantages, the present invention provides an overvoltage protection combination lightning arrester for an electric power system.
The invention is realized in such a way, an overvoltage protection combined lightning arrester of a power system is constructed, and the overvoltage protection combined lightning arrester comprises an upper electrode, a lower electrode, a resistor body, an insulator, a connection fixing part and an inner insulation sealing layer, wherein the upper electrode is connected to the upper part of the resistor body, the lower electrode is connected to the lower part of the resistor body, the lower end of the lower electrode and the upper end of the upper electrode are both connected with the connection fixing part, the insulators are sleeved outside the upper electrode, the resistor body and the lower electrode, and the inner insulation sealing layer is arranged between the insulators and the outer walls of the upper electrode, the resistor body and the lower electrode; the electrode structure is characterized in that annular grooves are formed in the peripheral sides of the upper electrode and the lower electrode, annular sealing mechanisms are arranged in the annular grooves, the annular sealing mechanisms are arranged between the annular grooves and the inner insulating sealing layer in a sealing mode, and the outer walls of the annular sealing mechanisms are attached between the upper electrode or the lower electrode and the inner insulating sealing layer in a sealing mode.
Further, preferably, the annular sealing structure comprises outer sealing resin, inner sealing resin and an annular iron ring, the inner sealing resin is hermetically wrapped around the outer portion of the annular iron ring, the outer sealing resin is hermetically sleeved on the outer portion of the inner sealing resin in an integrated sealing mode, the outer sealing resin is sleeved in the annular groove, a metal conductor is integrally arranged on the annular iron ring in the radial direction, and the annular iron ring is connected with the upper electrode or the lower electrode through the metal conductor.
Preferably, both the outer sealing resin and the inner sealing resin are insulating thermoplastic resins, and the curing temperature of the outer sealing resin is lower than the curing temperature of the inner sealing resin.
Further, as preferred, the outer sealing resin includes a groove joint section and a shaft joint section, the groove joint section is connected in the annular groove in an extending manner, the shaft joint section is connected to the inner side of the inner insulating sealing layer, and the groove joint section and the shaft joint section are integrally arranged.
Further, preferably, the longitudinal cross section of the annular iron ring is in an oval, circular or annular structure.
Preferably, the outer wall of the annular sealing mechanism is sealed and attached between the upper electrode or the lower electrode and the inner insulating sealing layer in a heat bonding manner, and the heat bonding manner includes: and the annular iron ring and/or the upper electrode and the lower electrode are thermally jointed in a way of increasing the temperature.
Further, it is preferable that the radial thickness between the outer wall of the inner sealing resin and the outer wall of the annular iron ring is the same at each position, that is, the inner sealing resin is provided with a uniform thickness in cross section.
Preferably, the resistor body is formed by a plurality of nonlinear resistor blocks, the nonlinear resistor blocks are connected in series in an overlapping manner, the connection fixing portion includes a stud and a connection washer, one end of the stud is in threaded connection with the upper electrode or the lower electrode, the other end of the stud extends upwards or downwards, the connection washers are arranged on two threaded heads of the stud, and the connection washers fix the end portions of the inner insulation sealing layers to the outer end portions of the upper electrode and the lower electrode.
Further, it is preferable that the inner insulating seal layer includes a cylindrical woven fabric made of glass fiber, the cylindrical woven fabric is impregnated with epoxy resin, and the nonlinear resistor block contains zinc oxide as a main component.
Further, it is preferable that the annular groove has a depth of a maximum groove depth of H1, and the upper electrode or the lower electrode has a minimum thickness at the maximum groove depth and is H2, wherein H2 is at least three times as large as H1.
Further, the invention also provides a preparation method of the overvoltage protection combined lightning arrester of the power system, which comprises the following steps:
(1) Preparation of endosome components: superposing a plurality of nonlinear resistance blocks together in a series superposition mode to form a resistor body, and respectively connecting an upper electrode and a lower electrode at two ends of the resistor body in a conductive way to form an inner body component;
(2) Preparing an annular sealing structure: preparing an annular iron ring which is adaptive to the size of the annular grooves of the upper electrode and the lower electrode, sealing and wrapping a layer of inner sealing resin around the outer part of the annular iron ring, and then integrally and hermetically sleeving outer sealing resin on the outer part of the inner sealing resin to form an annular sealing structure, and connecting the annular iron ring with the upper electrode or the lower electrode by adopting a metal conductor;
(3) The annular sealing structure is sleeved in the annular grooves of the upper electrode and the lower electrode, and can be sawn to have certain elasticity so as to be conveniently sleeved along the sawn part, and the annular sealing structure protrudes out of the annular grooves by a certain thickness after being sleeved;
(4) Covering at least one layer of inner insulating and sealing layer on the periphery of the inner body component, and enabling the inner insulating and sealing layer to be positioned on the outer side of the inner body component and the annular sealing structure, so that all structures inside the inner insulating and sealing layer form a whole;
(5) Heating, fitting and sealing: sleeving eddy current heating equipment outside the whole body formed in the step (4), wherein the eddy current heating equipment is just positioned outside the annular sealing structure, the upper electrode and the lower electrode are heated by the eddy current heating equipment, the annular iron ring in the annular sealing structure generates heat for heating, the outer sealing resin and the inner sealing resin are hot-melted and attached by heating the annular iron ring, meanwhile, the upper electrode and the lower electrode also generate heat for heating, and then the annular sealing structure is attached to the upper electrode or the lower electrode and the inner insulating sealing layer is attached to the annular sealing structure in a sealing manner, so that the sealing capability is ensured, and meanwhile, the pressing equipment is used for pressing the annular sealing structure uniformly and radially inwards in the radial direction;
(6) And (3) placing the structure processed in the step (5) in a mould, injecting polymer resin into the mould by using an injection moulding machine to form the insulator outside the whole body, and hardening the insulator in the mould to form the insulator.
The eddy current heating equipment at least comprises an eddy current coil, a power supply and a binding post, wherein two ends of the eddy current coil are connected to the power supply through the binding post, and a cavity in the middle of the eddy current coil is coaxially arranged on the outer side of the annular sealing structure in a penetrating mode.
The invention has the following advantages: compared with the same type of equipment, the overvoltage protection combined lightning arrester of the power system provided by the invention has the following advantages:
according to the invention, the annular grooves are formed in the upper electrode and the lower electrode, the annular sealing mechanism is arranged in the annular grooves and is arranged between the annular grooves and the inner insulating sealing layer in a sealing manner, and the outer wall of the annular sealing mechanism is in sealing fit between the upper electrode or the lower electrode and the inner insulating sealing layer in a heat fit manner, so that the heat fit capacity and effect of the interior of the annular sealing mechanism can be effectively improved, the service life is prolonged, and the problem of oxidation caused by rainwater scouring due to cracking or cracks in the use process is prevented; according to the invention, an eddy current local heating mode is adopted, so that non-contact heating is carried out from the inside during hot lamination, the capacity of a lamination part is effectively improved by heating the annular iron ring, the upper electrode and the lower electrode, compared with the lamination by heating materials such as resin, the lamination degree can be effectively ensured, the lamination capacity is improved, the end sealing effect and the bonding capacity are ensured, meanwhile, the annular iron ring is connected with the electrode through a conductor, so that the local discharge can be avoided, the durability is improved, and the problem of aging such as corrosion, oxidation and the like of the electrode, the resistor body and the like is effectively avoided.
Drawings
Fig. 1 is a schematic view of a lightning protection device according to the prior art;
fig. 2 is a schematic view of the structure of the lightning arrester according to the invention;
FIG. 3 is an enlarged partial schematic view of the annular seal of the present invention;
FIG. 4 is a schematic view of the coil structure of the eddy current heating apparatus of the present invention;
fig. 5 is a schematic structural view of the annular iron ring of the present invention.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 5, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
The invention provides an overvoltage protection combined lightning arrester of a power system through improvement, which comprises an upper electrode 2, a lower electrode 6, a resistor body 3, an insulator 5, a connecting and fixing part 1 and an inner insulating sealing layer 4, wherein the upper electrode 2 is connected to the upper part of the resistor body 3, the lower electrode 6 is connected to the lower part of the resistor body 3, the lower end of the lower electrode and the upper end of the upper electrode are both connected with the connecting and fixing part 1, the insulators 5 are sleeved outside the upper electrode, the resistor body and the lower electrode, and the inner insulating sealing layer 4 is arranged between the insulators and the outer walls of the upper electrode, the resistor body and the lower electrode; the electrode structure is characterized in that annular grooves 7 are formed in the peripheral sides of the upper electrode and the lower electrode, annular sealing mechanisms 8 are arranged in the annular grooves, the annular sealing mechanisms are arranged between the annular grooves and the inner insulating sealing layer in a sealing mode, and the outer walls of the annular sealing mechanisms are attached between the upper electrode or the lower electrode and the inner insulating sealing layer in a sealing mode.
In this embodiment, the annular sealing structure includes an outer sealing resin 13, an inner sealing resin 11 and an annular iron ring 12, the inner sealing resin 11 is hermetically wrapped around the outside of the annular iron ring, the outer sealing resin 13 is hermetically sealed and arranged on the outside of the inner sealing resin 11 in an integrated manner, the outer sealing resin 13 is sleeved in the annular groove 7, at least one metal conductor is integrally arranged in the radial direction of the annular iron ring 12, and the annular iron ring is connected with the upper electrode or the lower electrode by the metal conductor.
The outer sealing resin and the inner sealing resin are both made of insulating thermoplastic resin, and the curing temperature of the outer sealing resin is lower than that of the inner sealing resin, so that the outer sealing resin is firstly softened when heated, softened and attached, and the electrodes are attached tightly.
The outer sealing resin 13 comprises a groove connection section and a shaft connection section 10, the groove connection section extends into the annular groove, the shaft connection section 10 is connected to the inner side of the inner insulating sealing layer, and the groove connection section and the shaft connection section are integrally arranged.
The longitudinal cross section of the annular iron ring is in an oval, circular or annular structure.
The outer wall of the annular sealing mechanism is sealed and attached between the upper electrode or the lower electrode and the inner insulation sealing layer in a heat attaching mode, and the heat attaching mode comprises the following steps: and the annular iron ring and/or the upper electrode and the lower electrode are thermally jointed in a way of increasing the temperature.
The radial thickness between the outer wall of the inner sealing resin and the outer wall of the annular iron ring is the same at each position, namely the inner sealing resin is arranged with the same thickness on the cross section.
The resistance body is established by a plurality of nonlinear resistance pieces, and a plurality of nonlinear resistance pieces are in the same place with the mode superpose of establishing ties, connects the fixed part and includes stud 9 and connection washer, stud 9's one end and last electrode or lower electrode threaded connection, just stud's the other end upwards or downwardly extending, two threaded heads of stud 9 all are provided with connection washer, just connection washer is with the end fixing of interior insulating seal layer at the outside end of last electrode and lower electrode.
The inner insulating sealing layer comprises cylindrical woven cloth made of glass fiber, the cylindrical woven cloth is impregnated with epoxy resin, and the nonlinear resistance block takes zinc oxide as a main component.
The depth of the maximum groove depth of the annular groove is H1, the thickness of the upper electrode or the lower electrode at the maximum groove depth is the smallest, and is H2, wherein the H2 is at least three times the size of the H1.
In addition, the invention also provides a preparation method of the overvoltage protection combined lightning arrester of the power system, which comprises the following steps:
(1) Preparation of endosome components: a plurality of nonlinear resistance blocks are superposed together in a series superposition mode to form a resistor body 3, and an upper electrode 2 and a lower electrode 6 are respectively connected with two ends of the resistor body 3 in a conduction mode to form an inner body component;
(2) Preparing an annular sealing structure: preparing an annular iron ring 12 which is adaptive to the size of the annular grooves of the upper electrode 2 and the lower electrode 6, sealing and wrapping a layer of inner sealing resin around the outer part of the annular iron ring 12, and then integrally and hermetically sleeving outer sealing resin on the outer part of the inner sealing resin to form an annular sealing structure, wherein the annular iron ring is connected with the upper electrode or the lower electrode by adopting a metal conductor, namely the metal conductor penetrates through the inner sealing resin and the outer sealing resin;
(3) The annular sealing structure is sleeved in the annular grooves of the upper electrode 2 and the lower electrode 6, the annular sealing structure can be sawn to be convenient to sleeve, so that the annular sealing structure has certain elasticity and is further convenient to open and sleeve along the sawn part, and the annular sealing structure protrudes out of the annular grooves by a certain thickness after the annular sealing structure is sleeved;
(4) Covering at least one inner insulating and sealing layer 4 around the inner body member, and enabling the inner insulating and sealing layer to be positioned outside the inner body member and the annular sealing structure, so that all structures inside the inner insulating and sealing layer form a whole;
(5) Heating, fitting and sealing: sleeving eddy current heating equipment outside the whole body formed in the step (4), wherein the eddy current heating equipment is just positioned outside the annular sealing structure, the upper electrode and the lower electrode are heated by the eddy current heating equipment, the annular iron ring in the annular sealing structure generates heat for heating, the outer sealing resin and the inner sealing resin are hot-melted and attached by heating the annular iron ring, meanwhile, the upper electrode and the lower electrode also generate heat for heating, and then the annular sealing structure is attached to the upper electrode or the lower electrode and the inner insulating sealing layer is attached to the annular sealing structure in a sealing manner, so that the sealing capability is ensured, and meanwhile, the pressing equipment is used for pressing the annular sealing structure uniformly and radially inwards in the radial direction;
(6) And (3) placing the structure processed in the step (5) in a mould, injecting polymer resin into the mould by using an injection moulding machine to form the insulator 5 outside the whole body, and hardening the insulator in the mould to form the insulator.
The eddy current heating equipment at least comprises an eddy current coil 14, a power supply and a binding post 15, two ends of the eddy current coil 14 are connected to the power supply through the binding post 15, and a cavity in the middle of the eddy current coil is coaxially arranged in a penetrating mode on the outer side of the annular sealing structure.
According to the invention, the annular grooves are formed in the upper electrode and the lower electrode, the annular sealing mechanism is arranged in the annular grooves and is arranged between the annular grooves and the inner insulating sealing layer in a sealing manner, and the outer wall of the annular sealing mechanism is in sealing fit between the upper electrode or the lower electrode and the inner insulating sealing layer in a heat fit manner, so that the heat fit capacity and effect of the interior of the annular sealing mechanism can be effectively improved, the service life is prolonged, and the problem of oxidation caused by rainwater scouring due to cracking or cracks in the use process is prevented; according to the invention, an eddy current local heating mode is adopted, so that non-contact heating is carried out from the inside during hot lamination, the capacity of a lamination part is effectively improved by heating the annular iron ring, the upper electrode and the lower electrode, compared with the lamination by heating materials such as resin, the lamination degree can be effectively ensured, the lamination capacity is improved, the end sealing effect and the bonding capacity are ensured, meanwhile, the annular iron ring is connected with the electrode through a conductor, so that the local discharge can be avoided, the durability is improved, and the problem of aging such as corrosion, oxidation and the like of the electrode, the resistor body and the like is effectively avoided.
The basic principles and main features of the present invention and the advantages of the present invention are shown and described above, and the standard parts used in the present invention can be purchased from the market, the special-shaped parts can be customized according to the description and the description of the attached drawings, the specific connection mode of each part adopts the conventional means of bolt, rivet, welding and the like mature in the prior art, the machinery, parts and equipment adopt the conventional type in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, and the details are not described herein.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. An overvoltage protection combined lightning arrester of a power system comprises an upper electrode, a lower electrode, a resistor body, an insulator, a connecting fixing part and an inner insulating sealing layer, wherein the upper electrode is connected to the upper part of the resistor body, the lower electrode is connected to the lower part of the resistor body, the connecting fixing part is connected to the lower end of the lower electrode and the upper end of the upper electrode, the insulator is sleeved outside the upper electrode, the resistor body and the lower electrode, and the inner insulating sealing layer is arranged between the insulator and the outer walls of the upper electrode, the resistor body and the lower electrode; the electrode structure is characterized in that annular grooves are formed in the peripheral sides of the upper electrode and the lower electrode, annular sealing mechanisms are arranged in the annular grooves, the annular sealing mechanisms are arranged between the annular grooves and the inner insulating sealing layer in a sealing mode, and the outer walls of the annular sealing mechanisms are attached between the upper electrode or the lower electrode and the inner insulating sealing layer in a sealing mode;
the preparation method of the overvoltage protection combined lightning arrester for preparing the power system comprises the following steps:
(1) Preparation of endosome components: superposing a plurality of nonlinear resistance blocks together in a series superposition mode to form a resistor body, and respectively connecting an upper electrode and a lower electrode at two ends of the resistor body in a conductive mode to form an inner body component;
(2) Preparing an annular sealing structure: preparing an annular iron ring which is adaptive to the size of the annular grooves of the upper electrode and the lower electrode, sealing and wrapping a layer of inner sealing resin around the outer part of the annular iron ring, and then integrally and hermetically sleeving outer sealing resin on the outer part of the inner sealing resin to form an annular sealing structure, and connecting the annular iron ring with the upper electrode or the lower electrode by adopting a metal conductor;
(3) The annular sealing structure is sleeved in the annular grooves of the upper electrode and the lower electrode, and can be sawn to have certain elasticity so as to be conveniently sleeved along the sawn part, and the annular sealing structure protrudes out of the annular grooves by a certain thickness after being sleeved;
(4) Covering at least one layer of inner insulating and sealing layer on the periphery of the inner body component, and enabling the inner insulating and sealing layer to be positioned on the outer side of the inner body component and the annular sealing structure, so that all structures inside the inner insulating and sealing layer form a whole;
(5) Heating, fitting and sealing: sleeving eddy current heating equipment outside the whole formed in the step (4), wherein the eddy current heating equipment is just positioned outside the annular sealing structure, the upper electrode and the lower electrode are heated by the eddy current heating equipment, the annular iron ring in the annular sealing structure generates heat for heating, the annular iron ring is heated to realize hot melting and bonding of the outer sealing resin and the inner sealing resin, meanwhile, the upper electrode and the lower electrode also generate heat for heating, so that the annular sealing structure and the upper electrode or the lower electrode as well as the inner insulating sealing layer are sealed and bonded with the annular sealing structure, the sealing capability is ensured, and meanwhile, the pressing equipment is used for pressing the annular sealing structure radially inwards uniformly in the radial direction;
(6) Placing the structure processed in the step (5) in a mould, injecting polymer resin into the mould by using an injection moulding machine to form an insulator outside the whole body, and hardening the insulator in the mould to form the insulator;
the eddy current heating equipment at least comprises an eddy current coil, a power supply and a binding post, wherein two ends of the eddy current coil are connected to the power supply through the binding post, and a cavity in the middle of the eddy current coil is coaxially arranged on the outer side of the annular sealing structure in a penetrating mode.
2. The combined overvoltage protection arrester of an electrical power system according to claim 1, characterized in that: the annular sealing structure comprises outer sealing resin, inner sealing resin and an annular iron ring, the inner sealing resin is hermetically wrapped around the outer portion of the annular iron ring, the outer sealing resin is integrally sleeved on the outer portion of the inner sealing resin in a sealing mode, the outer sealing resin is sleeved in the annular groove in a sleeved mode, a metal conductor is integrally arranged on the annular iron ring in the radial direction, and the annular iron ring is connected with the upper electrode or the lower electrode through the metal conductor.
3. An overvoltage protection combination lightning protection device for an electrical power system according to claim 2, characterized in that: the outer sealing resin and the inner sealing resin are both made of insulating thermoplastic resin, and the curing temperature of the outer sealing resin is lower than that of the inner sealing resin.
4. A combined overvoltage protection arrester according to claim 3, characterized in that: the outer sealing resin comprises a groove connection section and a shaft connection section, the groove connection section extends into the annular groove and is connected with the inner side of the inner insulating sealing layer, and the groove connection section and the shaft connection section are integrally arranged; the longitudinal cross section of the annular iron ring is of an oval, circular or annular structure.
5. The overvoltage protection combination lightning arrester of an electric power system according to claim 4, characterized in that: the outer wall of the annular sealing mechanism is sealed and attached between the upper electrode or the lower electrode and the inner insulation sealing layer in a heat attaching mode, and the heat attaching mode comprises the following steps: and the annular iron ring and/or the upper electrode and the lower electrode are thermally jointed in a way of increasing the temperature.
6. An overvoltage protection combination lightning protection device for an electrical power system according to claim 5, characterized in that: the radial thickness between the outer wall of the inner sealing resin and the outer wall of the annular iron ring is the same at each position, namely the inner sealing resin is arranged with the same thickness on the cross section.
7. The overvoltage protection combination lightning protection device of an electric power system according to claim 6, characterized in that: the resistor body is constructed by a plurality of nonlinear resistance blocks, the nonlinear resistance blocks are connected together in a series connection mode in an overlapping mode, the connection fixing portion comprises a double-end stud and a connection gasket, one end of the double-end stud is in threaded connection with the upper electrode or the lower electrode, the other end of the double-end stud extends upwards or downwards, the connection gasket is arranged on two thread heads of the double-end stud, and the connection gasket fixes the end portion of the inner insulation sealing layer at the outer side end portions of the upper electrode and the lower electrode.
8. The overvoltage protection combination lightning protection device of an electric power system according to claim 7, characterized in that: the inner insulating sealing layer comprises cylindrical woven cloth made of glass fiber, the cylindrical woven cloth is impregnated with epoxy resin, and the nonlinear resistance block takes zinc oxide as a main component.
9. An overvoltage protection combination lightning arrester according to claim 8, characterized in that: the depth of the maximum groove depth of the annular groove is H1, the thickness of the upper electrode or the lower electrode at the maximum groove depth is the smallest, and is H2, wherein the H2 is at least three times the size of the H1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111272847.1A CN113922320B (en) | 2021-10-29 | 2021-10-29 | Overvoltage protection combined lightning arrester of power system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111272847.1A CN113922320B (en) | 2021-10-29 | 2021-10-29 | Overvoltage protection combined lightning arrester of power system |
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| Publication Number | Publication Date |
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| CN113922320A CN113922320A (en) | 2022-01-11 |
| CN113922320B true CN113922320B (en) | 2023-01-31 |
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| CN109346254A (en) * | 2018-10-23 | 2019-02-15 | 襄阳市三三电气有限公司 | Pressure discharges the distribution type arrester that no-spark generates |
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| US4841108A (en) * | 1987-11-06 | 1989-06-20 | Cooper Industries, Inc. | Recloser plenum puffer interrupter |
| CN201336195Y (en) * | 2008-12-23 | 2009-10-28 | 武汉雷泰新能源有限公司 | High-voltage power cable sheath protector |
| CN203910378U (en) * | 2014-06-24 | 2014-10-29 | 浙江天虹电气金具有限公司 | Composite external sleeve type metal oxide lightning arrester |
| CN206259548U (en) * | 2016-11-01 | 2017-06-16 | 泰科电子(上海)有限公司 | Electronic product and connection sleeve pipe |
| CN210349473U (en) * | 2019-04-22 | 2020-04-17 | 中国电力科学研究院有限公司 | Composite insulator device with built-in piezoresistor unit |
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| CN109346254A (en) * | 2018-10-23 | 2019-02-15 | 襄阳市三三电气有限公司 | Pressure discharges the distribution type arrester that no-spark generates |
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Denomination of invention: A combined lightning protection device for overvoltage protection in power systems Granted publication date: 20230131 Pledgee: Bank of Jiangsu Limited by Share Ltd. Shenzhen branch Pledgor: Runshida Engineering Co.,Ltd. Registration number: Y2024980009845 |