Assembling method and assembling device applied to 500kV and above lightning protection insulator

Abstract

The invention provides an assembling method and an assembling device applied to a lightning protection insulator of 500kV and above. The assembling method comprises the following steps: superposing a plurality of resistor discs and then winding an adhesive tape; springs and aluminum blocks are added to the upper ends and the lower ends of the stacked resistor discs, core rods penetrate into inner rings of the resistor discs, and the aluminum blocks and the core rods are subjected to compression joint and shaping to form first sections; the lifting device lifts the first section to a set height, the steps are repeated, and a next section continues to be formed below the first section until the inner core of the lightning protection insulator is assembled; and gluing a gap between the annular barrel and the inner core of the lightning protection insulator, and then baking to complete the manufacturing of the lightning protection insulator. Therefore, the assembly of the lightning protection insulator can be completed at the window of the existing tower, the size of a fitting does not need to be increased, the length of the whole section of the assembled lightning protection insulator is more than 3m, and the lightning protection insulator can be applied to a high-voltage line of 500kV and more.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of electrical engineering, and particularly relates to an assembling method and an assembling device applied to 500kV and above lightning protection insulators. BACKGROUND

[0002] Global lightning strikes are more than one billion times per year, which is the most frequent serious disaster causing line tripping and power failure. The lightning protection mode of the traditional insulator parallel lightning arrester is restricted by the electric field distribution, and a safety distance of at least 30% of the length of the insulator must be provided between the two, which requires the installation of a cross arm and is difficult to install.

[0003] Patent ZL201811052145.0 discloses a 500kV line lightning protection device based on a lightning arrester and an insulator, which can simultaneously realize lightning protection and insulation functions. However, there are problems in the actual manufacturing process. The traditional lightning arrester is assembled in sections, and the assembly difficulty is low. Only one section is assembled at a time, and the subsequent sections are vulcanized in sections. The process is relatively simple. The lightning protection insulator needs to be installed in the tower window instead of the insulator. Compared with the traditional lightning arrester, the height is reduced by 30%. Therefore, if the section assembly is used again, the size of the fitting is increased, which is difficult to meet the requirements.

[0004] Therefore, how to realize the whole-section assembly of the lightning protection insulator in the existing tower without increasing the size of the fitting has become a technical problem to be solved by the technical personnel in the field. SUMMARY

[0005] In order to solve the above technical problems, the present disclosure provides an assembling method and an assembling device applied to 500kV and above lightning protection insulators, which are used to realize the whole-section assembly of the lightning protection insulator in the existing tower without increasing the size of the fitting.

[0006] In a first aspect, the present disclosure provides an assembling method applied to 500kV and above lightning protection insulators, which comprises the following steps:

[0007] Step S1: stacking a plurality of resistance sheets;

[0008] Step S2: winding adhesive tape on the stacked resistance sheets;

[0009] Step S3: adding springs and aluminum blocks to both ends of the stacked resistance sheets, and inserting a core rod into the inner ring of the resistance sheets, and performing pressure connection and shaping on the aluminum blocks and the core rod to form a first section;

[0010] Step S4: lifting the first section to a set height by a lifting device, repeating steps S1 to S3, and continuing to form a next section below the first section until the lightning protection insulator inner core is assembled;

[0011] Step S5: fixing a ring-shaped barrel on the lightning protection insulator inner core by a line crane.

[0012] Step S6: After the gap between the annular barrel and the inner core of the lightning protection insulator is glued, baking is performed to complete the production of the lightning protection insulator.

[0013] Optionally, the stacking of the plurality of resistance sheets comprises:

[0014] A corrugated sheet is arranged between at least some adjacent resistance sheets in the plurality of resistance sheets, the corrugated sheet is in direct contact with the resistance sheet, the outer diameter of the corrugated sheet is 0.5mm-1mm smaller than the outer diameter of the resistance sheet, and the inner diameter of the corrugated sheet is 0.5mm-1mm larger than the inner diameter of the resistance sheet.

[0015] Optionally, the elastic modulus of the corrugated sheet is greater than or equal to 68GPa and less than or equal to 72GPa.

[0016] Optionally, the spring is a linear spring.

[0017] Optionally, the aluminum block and the core rod are crimped by a crimping force of 5-12MPa.

[0018] Optionally, the inner ring size of the aluminum block is 0.5mm-5mm smaller than the inner diameter of the resistance sheet.

[0019] Optionally, the length of the lightning protection insulator is greater than or equal to 3m.

[0020] Optionally, the adhesive tape comprises an insulating adhesive tape.

[0021] In a second aspect, based on the same inventive concept, the present disclosure provides an assembling device applied to 500kV and above lightning protection insulators, which is used to assemble lightning protection insulators by using the assembling method of lightning protection insulators according to the first aspect, and comprises a winding table, a lifting device, a crimping machine, and a steel structure main body, wherein the lifting device is located inside the steel structure main body, the winding table is located on one side of the steel structure main body, and the crimping machine is fixed on the steel structure main body near the side of the winding table.

[0022] Optionally, the lifting device is configured to drive the first section to be lifted to a preset height in a vertical direction relative to the steel structure main body.

[0023] The technical scheme provided by the embodiment of the present disclosure has the following advantages compared with the prior art: the assembling method and the assembling device for the lightning protection insulator with a voltage of 500kV or above provided by the present disclosure stack multiple resistance sheets; the stacked resistance sheets are wrapped with adhesive tape; springs and aluminum blocks are added to the upper and lower ends of the stacked resistance sheets, and a core rod is inserted into the inner ring of the resistance sheet, and the aluminum blocks and the core rod are crimped to form a first section; the lifting device lifts the first section to a set height, and the above steps are repeated to continue to form a next section below the first section until the lightning protection insulator inner core is assembled; a ring-shaped barrel is fixed on the lightning protection insulator inner core by a line crane; the gap between the ring-shaped barrel and the lightning protection insulator inner core is glued and baked to complete the production of the lightning protection insulator. By lifting the completed first section, the lightning protection insulator can be vertically assembled in the existing tower window, without the need to increase the size of the hardware, and the resistance sheets of each section of the lightning protection insulator are crimped and shaped by the aluminum blocks, avoiding loosening under high current, and improving the high current bearing capacity of the lightning protection insulator. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0026] Figure 1 Fig. 1 shows a lightning protection insulator assembling flowchart provided by the embodiment of the present disclosure;

[0027] Figure 2 Fig. 2 shows a structure schematic diagram of a lightning protection insulator assembling device provided by the embodiment of the present disclosure. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0029] Many specific details are set forth in the following description in order to provide a thorough understanding of the present disclosure. However, the present disclosure can be practiced according to other embodiments that do not require some of the specific details described below. It is understood that the present disclosure is well suited to implement embodiments like those described below, but the description is not intended to limit the scope of the present disclosure.

[0030] When the lightning protection insulator is installed in the tower window instead of the insulator, the lightning protection insulator is lowered by 30% compared with the traditional lightning arrester structure height, and if the segmented assembly is used, the size of the fitting needs to be increased, which is difficult to meet the process requirements. Therefore, the lightning protection insulator needs to be assembled in whole section. Since the length of the lightning protection insulator used on the 500kV and above high-voltage line is as long as 3m or more, it is difficult for the core rod to penetrate into such a long annular resistance sheet, and therefore, it is necessary to develop an assembly method and assembly device of the lightning protection insulator that can be applied to the 500kV and above high-voltage line.

[0031] Figure 1 Fig. 1 shows an assembly process schematic diagram of a lightning protection insulator provided by an embodiment of the present disclosure, Figure 2 Fig. 2 shows a structure schematic diagram of a lightning protection insulator assembly device provided by an embodiment of the present disclosure, please refer to Figure 1 and Figure 2 The present disclosure provides an assembly method of a lightning protection insulator applied to 500kV and above, which comprises the following steps: S1, stacking a plurality of resistance sheets; S2, winding adhesive tape on the stacked resistance sheets; S3, adding springs and aluminum blocks at both ends of the stacked resistance sheets, and penetrating the core rod into the inner ring of the resistance sheet, and performing pressure connection and shaping of the aluminum block and the core rod to form a first section; S4, lifting the first section to a set height by the lifting device 40, repeating steps S1 to S3, and continuing to form a next section below the first section until the lightning protection insulator inner core is assembled; S5, fixing the annular barrel on the lightning protection insulator inner core by the line crane; S6, gluing and baking the gap between the annular barrel and the lightning protection insulator inner core to complete the production of the lightning protection insulator.

[0032] Specifically, in step S1, the resistance sheet is clamped from the upper station, and the resistance sheet is an annular resistance sheet; a plurality of annular resistance sheets are placed in the corresponding clamps and fixed, and are stacked to a set height. In step S2, after the plurality of annular resistance sheets are stacked to the set height, the stacked annular resistance sheets are wrapped with adhesive tape on the winding table 30, the adhesive tape can provide mechanical protection for the annular resistance sheet and improve its stability, facilitating the smooth progress of the subsequent glue hitting process; in addition, the wrapped adhesive tape can also slow down the impact force of the large current on the lightning protection insulator. In step S3, after the resistance sheets are stacked to the set height, springs and aluminum blocks are added to the upper and lower end faces of the stacked resistance sheets, or the springs and aluminum blocks at the lower end of the resistance sheet are placed in advance before the resistance sheets are stacked, which is not limited in the present disclosure; at the same time, the mandrel is inserted into the inner ring of the stacked resistance sheets, and then the aluminum blocks and the mandrel are crimped to shape the resistance sheets in this section, and the first section of the lightning protection insulator can be obtained. Crimping and shaping can avoid loosening of the resistance sheet under a large current, and can improve the large current bearing capacity of the entire lightning protection insulator. In step S4, the first section prepared is lifted to a certain height by the lifting device 40, and steps S1 to S3 are repeated to continue assembling the next section on the same mandrel, thereby achieving the assembly of the entire section of the lightning protection insulator core in the existing tower window without the need for sectional assembly and the need to increase the size of the fittings, which is conducive to simplifying the process. It should be noted that the number of sections is not limited in the present disclosure, and the length and number of sections can be divided according to the actual length of the lightning protection insulator required, and optionally, the assembly of the lightning protection insulator core can be divided into two sections, or three sections, or four sections, etc., which is not limited in the present disclosure, and can be set according to actual conditions. In step S5, after the lightning protection insulator core is assembled, the annular barrel is fixed on the fitting threads at both ends of the lightning protection insulator core by the traveling crane. In step S6, the gap between the annular barrel and the lightning protection insulator core is glued, and high-performance insulating glue can be used, and the type and model of the glue are not limited in the present disclosure, and the actual needs are used as the standard; after the gluing is completed, it is subjected to high-temperature baking, and a lightning protection insulator applicable to 500kV and above can be obtained. In this way, by lifting the first section prepared, the entire section assembly of the lightning protection insulator can be realized in the existing tower window without the need to increase the size of the fittings, thereby meeting the process requirements.

[0033] In addition, by stacking the resistance sheets and extruding and fixing the resistance sheets with the fittings at both ends, it can be ensured that the resistance sheets of each section of the assembled lightning protection insulator bear a certain extrusion force, avoiding the resistance sheets at both ends of the lightning protection insulator not bearing force, so as to avoid loosening of the resistance sheet under a large current, improve the large current bearing capacity of the entire lightning protection insulator, and improve the safety of on-site use. Optionally, the length of the lightning protection insulator provided in the present embodiment is greater than or equal to 3 meters, and the length of the lightning protection insulator is not limited in the present disclosure, and can be set according to actual product needs.

[0034] Please continue to refer to Figure 1 The application discloses an assembling method of a lightning protection insulator applied to 500kV and above, and the method comprises the following steps: adding a corrugated sheet between at least part of adjacent resistance sheets in a plurality of resistance sheets, the corrugated sheet is in direct contact with the resistance sheet, the outer diameter of the corrugated sheet is 0.5mm-1mm smaller than the outer diameter of the resistance sheet, and the inner diameter of the corrugated sheet is 0.5mm-1mm larger than the inner diameter of the resistance sheet.

[0035] Specifically, in an optional embodiment of the application, a corrugated sheet is added between at least part of adjacent resistance sheets in a plurality of stacked resistance sheets, the corrugated sheet is provided with a periodic corrugated structure on the surface, and the corrugated sheet is in direct contact with the resistance sheet. During the process of stacking the resistance sheets, the addition of the corrugated sheet between at least part of adjacent resistance sheets can ensure good contact between the resistance sheets, and the elastic deformation capability of the corrugated sheet can absorb the stress generated by thermal expansion or mechanical vibration of the resistance sheet under a large current, thereby reducing the cracks or breakage of the resistance sheet. In addition, the corrugated structure of the corrugated sheet can also provide axial support to prevent the resistance sheet from deviating. In this way, the addition of the corrugated sheet between at least part of adjacent resistance sheets can significantly reduce the stress of the resistance sheet under a large current and also prevent the resistance sheet from deviating.

[0036] Please continue to refer to Figure 1 The application discloses an assembling method of a lightning protection insulator applied to 500kV and above, and the method comprises the following steps: adding a corrugated sheet between at least part of adjacent resistance sheets in a plurality of resistance sheets, the corrugated sheet is in direct contact with the resistance sheet, the outer diameter of the corrugated sheet is 0.5mm-1mm smaller than the outer diameter of the resistance sheet, and the inner diameter of the corrugated sheet is 0.5mm-1mm larger than the inner diameter of the resistance sheet.

[0037] Specifically, the elastic modulus of the corrugated sheet is a core mechanical parameter describing the ability of its material to resist elastic deformation, reflecting the quantitative relationship between the stiffness and deformation response of the material under stress. The elastic modulus (E) is represented as the ratio of stress (σ) to strain (ε) in the elastic deformation stage, that is, E = σ / ε, with the unit of Pascal (Pa). The elastic modulus can represent the ability of the material to resist elastic deformation. The greater the value, the harder the material, and the more difficult the deformation. In an optional embodiment provided by the present disclosure, the elastic modulus of the corrugated sheet located between adjacent resistance sheets is greater than or equal to 68 GPa and less than or equal to 72 GPa. Optionally, the elastic modulus of the corrugated sheet can be greater than or equal to 68 GPa and less than or equal to 70 GPa, or the elastic modulus of the corrugated sheet can be greater than or equal to 69 GPa and less than or equal to 71 GPa, or the elastic modulus of the corrugated sheet can be greater than or equal to 70 GPa and less than or equal to 72 GPa, and so on. Here, they are not listed one by one, and can be set according to actual process needs. As long as the elastic modulus of the corrugated sheet located between adjacent resistance sheets is in the interval range of greater than or equal to 68 GPa and less than or equal to 72 GPa. When the elastic modulus of the corrugated sheet is less than 68 GPa, the elastic modulus of the corrugated sheet is small, the material is relatively "soft", the ductility is too good, and the deformation is too large, which is not conducive to providing axial support for the resistance sheet. When the elastic modulus of the corrugated sheet is greater than 72 GPa, the elastic modulus of the corrugated sheet is large, the material is relatively "hard", the ductility is too poor, and the deformation is difficult, which is not conducive to absorbing the stress generated by the resistance sheet under large current, and is easy to cause the resistance sheet to crack or directly break. Therefore, by setting the elastic modulus of the corrugated sheet in the interval range of greater than or equal to 68 GPa and less than or equal to 72 GPa, the appropriate deformation of the corrugated sheet is conducive to absorbing the stress generated by the resistance sheet under large current, reducing the cracking or breaking of the resistance sheet, and also reducing the displacement of the resistance sheet and providing axial support.

[0038] Please continue to refer to Figure 1 The present disclosure provides an assembly method for a 500kV and above lightning protection insulator, and the spring is a linear spring.

[0039] Specifically, the linear spring is usually made of a metal wire. The types of linear springs include cylindrical spiral springs, conical spiral springs, plate springs, and the like. The present disclosure does not limit the types of linear springs in this embodiment, which can be selected according to actual process needs. In an optional embodiment provided by the present disclosure, the pressure F of the linear spring can be represented by the formula F = 82 x S 0.48 , where the unit of pressure F is MPa, and S is the area with the unit of m 2When the resistance sheet is stacked to a certain height, linear springs and aluminum blocks are added to both ends of the stacked resistance sheet, and the linear springs contact the resistance sheet to generate pressure. In this way, the springs added to both ends of the stacked resistance sheet are mainly used to provide stable mechanical pressure and adapt to environmental factors such as thermal expansion and vibration, so as to ensure that the resistance sheet maintains reliable electrical contact during long-term operation.

[0040] Of course, in other embodiments, nonlinear springs or the like can also be added to both ends of the resistance sheet, and the present disclosure does not limit this.

[0041] Please continue to refer to Figure 1 The present disclosure provides an assembly method for 500kV and above lightning protection insulators, which uses a pressure bonding force of 5-12MPa to pressure bond the aluminum block and the core rod.

[0042] Specifically, in an optional embodiment provided by the present disclosure, a pressure bonding force of 5-12MPa is used to pressure bond the aluminum block and the core rod. The pressure bonding force refers to the plastic deformation of the contact surface between the aluminum block and the core rod caused by mechanical external force, forming reliable mechanical interlocking and metallurgical bonding. The aluminum block has good ductility but low strength, and needs to be avoided from cracking during pressure bonding; the surface of the aluminum block is easy to form an oxide film, which needs to be destroyed by pressure bonding to achieve the conductivity / thermal conductivity performance. The core rod is usually steel or copper alloy, which has higher hardness than aluminum, and the pressure bonding force needs to be controlled to avoid excessive extrusion of aluminum material. Therefore, a suitable pressure bonding force needs to be selected to pressure bond the core rod and the aluminum material. In an optional embodiment provided by the present disclosure, a pressure bonding force of 5-12MPa is used to pressure bond the aluminum block and the core rod. Alternatively, a pressure bonding force of 5-11MPa can be used to pressure bond the aluminum block and the core rod, or a pressure bonding force of 5-10MPa can be used to pressure bond the aluminum block and the core rod, or a pressure bonding force of 5-9MPa can be used to pressure bond the aluminum block and the core rod, or a pressure bonding force of 5-8MPa can be used to pressure bond the aluminum block and the core rod, or a pressure bonding force of 5-7MPa can be used to pressure bond the aluminum block and the core rod, and so on. The specific values of the pressure bonding force are not limited in the present disclosure, as long as the pressure bonding force for pressure bonding the aluminum block and the core rod is within the range of 5-12MPa. When the pressure bonding force for pressure bonding the aluminum block and the core rod is less than 5MPa, the plastic deformation between the aluminum block and the core rod is not enough, which may cause poor contact and reduce the production yield; when the pressure bonding force for pressure bonding the aluminum block and the core rod is greater than 12MPa, the aluminum block and the core rod are excessively deformed, which may cause material rupture or tool damage. Therefore, the pressure bonding force for pressure bonding the aluminum block and the core rod is set within the range of 5-12MPa, so that the contact surface of the aluminum block and the core rod is plastically deformed to form reliable mechanical interlocking and metallurgical bonding, reducing the poor contact or excessive deformation caused by poor pressure bonding.

[0043] Please continue to refer to Figure 1The application discloses an assembling method of a lightning protection insulator applied to 500kV and above, wherein the inner ring size of the aluminum block is 0.5mm-5mm smaller than the inner diameter of the resistance sheet.

[0044] Specifically, in an optional embodiment provided by the application, the aluminum block is located at the two ends of the stacked resistance sheet and is press-connected with the core rod, the resistance sheet is in a ring structure and comprises an inner diameter and an outer diameter, the inner ring size of the aluminum block is 0.5mm-5mm smaller than the inner diameter of the resistance sheet, optionally, the inner ring size of the aluminum block is 0.5mm-4mm smaller than the inner diameter of the resistance sheet, or the inner ring size of the aluminum block is 0.5mm-3mm smaller than the inner diameter of the resistance sheet, or the inner ring size of the aluminum block is 0.5mm-2mm smaller than the inner diameter of the resistance sheet, or the inner ring size of the aluminum block is 0.5mm-1mm smaller than the inner diameter of the resistance sheet, and the like, which are not listed one by one herein, as long as the difference between the inner ring size of the aluminum block and the inner diameter of the resistance sheet is within the range of 0.5mm-5mm, so that the distance between the core rod and the inside of the resistance sheet between the two aluminum blocks is 0.5-5mm, the contact friction is avoided, and the internal insulation performance is not damaged. When the difference between the inner ring size of the aluminum block and the inner diameter of the resistance sheet is less than 0.5mm, the distance between the core rod and the resistance sheet is too small, which may lead to insufficient insulation between the core rod and the resistance sheet, breakdown under high voltage, short circuit or equipment damage, and may also lead to electric field concentration and increase the risk of partial discharge, thereby affecting the long-term reliability of the lightning protection insulator. When the difference between the inner ring size of the aluminum block and the inner diameter of the resistance sheet is greater than 5mm, the distance between the core rod and the resistance sheet is too large, which may increase the contact resistance between the core rod and the resistance sheet, thereby leading to local heating and energy loss, and the large distance between the core rod and the resistance sheet under high voltage may lead to electric field distortion, uneven voltage distribution and increased risk of partial breakdown. Therefore, by setting the difference between the inner ring size of the aluminum block and the inner diameter of the resistance sheet within the range of 0.5mm-5mm, the contact friction between the core rod and the inside of the resistance sheet can be reduced, and the reliability, safety and service life of the lightning protection insulator can be significantly improved.

[0045] Please continue to refer to Figure 1 The application discloses an assembling method of a lightning protection insulator applied to 500kV and above, wherein the length of the lightning protection insulator is greater than or equal to 3m.

[0046] Specifically, in an optional embodiment provided by the present disclosure, the lightning protection insulator assembled through the foregoing steps has a length greater than or equal to 3 m, optionally, the lightning protection insulator has a length greater than or equal to 3 m, or the lightning protection insulator has a length greater than or equal to 4 m, and so on. The present disclosure does not limit the length of the lightning protection insulator, and the length can be set according to actual needs. According to the rolling ball method theory, increasing the height of the lightning protection insulator can expand the protection radius. For example, the lightning protection insulator with a length of more than 3 m provided by the present embodiment can cover a larger area and is suitable for scenarios that require large-scale protection, while ordinary lightning protection insulators may have a protection blind spot due to insufficient height. By increasing the height, it can be ensured that lightning is effectively intercepted, and equipment damage is avoided. The lightning protection insulator with a length of more than 3 m provided by the present embodiment can be applied to 500 kV and above high-voltage lines, can cope with complex environments, can attract lightning earlier, and can reduce the risk of side strikes.

[0047] In addition, the lightning protection insulator with a length of more than 3 m provided by the present embodiment can integrate a monitoring and alarm system to provide real-time feedback on the operating state, facilitate fault early warning and rapid response.

[0048] Please continue to refer to Figure 1 The present disclosure provides an assembly method for a lightning protection insulator applied to 500 kV and above, and the adhesive tape includes an insulating adhesive tape.

[0049] Specifically, in an optional embodiment provided by the present disclosure, the insulating adhesive tape is wound on the resistance sheet, which is conducive to electrical insulation and optimization of electric field distribution, and prevents edge discharge. After the resistance sheet edge is wound with the adhesive tape, the local electric field strength can be reduced by 30%-50%. The adhesive tape can fill the gap, uniformize the electric field distribution, and reduce the risk of edge discharge. Contamination (such as dust and moisture) may exist on the surface of the resistance sheet or the inner wall of the epoxy barrel, causing surface creepage. Winding the insulating adhesive tape on the resistance sheet can form a physical barrier, increase the creepage distance, suppress surface creepage, and improve insulation reliability. During the gluing process, the epoxy resin may penetrate into the interior through the gap between the resistance sheets, causing short circuit or degradation of insulation performance. Winding the insulating adhesive tape on the resistance sheet can prevent the adhesive from penetrating into the gap between the resistance sheets, avoiding short circuit caused by adhesive penetration. The resistance sheet and the epoxy barrel have different coefficients of thermal expansion, and mechanical stress may be generated when the temperature changes. Winding the insulating adhesive tape on the resistance sheet can absorb part of the stress, reducing the risk of cracking of the resistance sheet or peeling of the epoxy barrel, and facilitating the buffering of thermal stress. In addition, the adhesive tape can temporarily fix the position of the resistance sheet to prevent displacement during gluing. The uneven surface of the resistance sheet may cause uneven filling of the epoxy adhesive, forming bubbles or cavities. The adhesive tape can smooth the surface of the resistance sheet, promote uniform distribution of the adhesive, and improve the packaging quality. The adhesive tape can also isolate water vapor, prolonging the service life of the component. In this way, winding the adhesive tape on the resistance sheet before gluing can be used to optimize electrical performance, improve mechanical stability, improve process compatibility, and reduce long-term operation risks.

[0050] Please refer toFigure 2 The application provides an assembling device 100 for lightning protection insulators with a voltage of 500kV or above, and the lightning protection insulator is assembled by using an assembling method for lightning protection insulators with a voltage of 500kV or above, and the assembling device 100 comprises a winding table 20, a lifting device 40, a pressure welding machine 30 and a steel structure main body 10, wherein the lifting device 40 is located in the interior of the steel structure main body 10, the winding table 20 is located on one side of the steel structure main body 10, and the pressure welding machine 30 is fixed on the steel structure main body 10 and located on the side close to the winding table 20. The assembling device 100 for lightning protection insulators further comprises a lifting table 50 and a transfer trolley 60, the lifting table 50 is located on the side of the steel structure main body 10 away from the winding table 20, the lifting table 50 is used for lifting the lightning protection insulator, and the transfer trolley 60 can be used for transferring the lightning protection insulator.

[0051] Specifically, in an optional embodiment provided by the application, the assembling device 100 for lightning protection insulators with a voltage of 500kV or above comprises a winding table 20, a lifting device 40, a pressure welding machine 30 and a steel structure main body 10, wherein the steel structure main body 10 serves as a support frame of the assembling device 100 for lightning protection insulators with a voltage of 500kV or above, is usually located at the bottom layer and provides a stable mounting base for other components. The lifting device 40 is installed in the interior of the steel structure main body 10, so as to facilitate the cooperation with the components such as the winding table 20 and the pressure welding machine 30 and realize the vertical assembly of the lightning protection insulator. The winding table 20 is arranged in the middle of the steel structure main body 10, so as to facilitate the winding operation of the lightning protection insulator by an operator. The pressure welding machine 30 is installed on a fixed station of the steel structure main body 10 and located close to the winding table 20, so as to perform the pressure welding operation on the lightning protection insulator and ensure the continuity of the assembly process. The transfer trolley 60 is located at the end or the outlet of the steel structure main body 10 and is used for receiving the lightning protection insulator after the assembly is completed and transferring the lightning protection insulator to the next process or a storage area.

[0052] In an optional embodiment provided by the application, the steps for assembling the lightning protection insulator by using the assembling device 100 for lightning protection insulators with a voltage of 500kV or above provided by the application are as follows: a plurality of resistance sheets are stacked, the stacked resistance sheets are wound with adhesive tape on the winding table 20, the clamping device clamps the resistance sheets from the upper station, the resistance sheets are placed in the corresponding clamps for fixation, springs and aluminum blocks are added to the upper and lower ends of the stacked resistance sheets, the lifting device 40 passes the mandrel into the inner ring of the resistance sheets, and the pressure welding machine 30 performs pressure welding on the aluminum blocks and the mandrel to form a first section. The lifting device 40 drives the first section after pressure welding to rise to a preset height, the previous steps are repeated, the lifting device 40 drives the first section and the mandrel to pass into the inner ring of the resistance sheets of the next section, and the pressure welding machine 30 performs pressure welding on the next section until the assembly of the inner core of the lightning protection insulator is completed. The ring barrel is fixed on the inner core of the lightning protection insulator by using the travelling crane, the gap between the ring barrel and the inner core of the lightning protection insulator is glued and baked, and the lightning protection insulator is completed.

[0053] Referring to Figure 2 The application provides an assembling device 100 for lightning protection insulators with a voltage of 500 kV or above, wherein the lifting device 40 is configured to drive the first section to be lifted to a preset height along the vertical direction relative to the steel structure body 10.

[0054] Specifically, in an optional embodiment provided by the application, after the resistance sheet is stacked, wound and crimped to form the first section, the lifting device 40 can lift the first section to a preset height, wherein the preset height refers to the height of the first section rising along the vertical direction relative to the steel structure body 10. In this way, after the first section is lifted to the preset height, the resistance sheet of the next section can be assembled on the same core rod, and lightning protection insulators can be assembled in whole sections through the existing tower window without increasing the size of the hardware. The length of the lightning protection insulator assembled in whole sections by using the assembling device 100 for lightning protection insulators with a voltage of 500 kV or above provided by the application is more than 3 m, and the lightning protection insulator can be applied to high-voltage lines with a voltage of 500 kV or above. In addition, when multiple sections need to be combined and assembled, the lifting device 40 drives the first section to be lifted to a preset height along the vertical direction relative to the steel structure body 10, and the preset height can be adjusted according to the actual length of the lightning protection insulator and the actual height of the first section. It should be noted that the lightning protection insulator can be vertically assembled by two or more sections, and the number of sections is not limited by the application, and can be divided according to the length of the lightning protection insulator to be manufactured.

[0055] In summary, the disclosure provides an assembly method and device for 500kV and above lightning protection insulator, comprising: stacking multiple resistance sheets; winding adhesive tape on the stacked resistance sheets; adding springs and aluminum blocks to both ends of the stacked resistance sheets, and inserting a core rod into the inner ring of the resistance sheet, and pressure bonding the aluminum block and the core rod to form a first section; lifting the first section to a set height by the lifting device, repeating the above steps, and continuing to form a lower section below the first section until the lightning protection insulator inner core is assembled; fixing the ring barrel on the lightning protection insulator inner core by the line crane; gluing and baking the gap between the ring barrel and the lightning protection insulator inner core to complete the production of the lightning protection insulator. By lifting the completed first section, at least two sections can be vertically assembled without increasing the size of the hardware, and the lightning protection insulator can be assembled in whole sections through the existing tower window. The lightning protection insulator assembled by the assembly device provided by the disclosure has a length of more than 3m, and can be applied to 500kV and above high-voltage lines. Adding corrugated sheets between at least some adjacent resistance sheets in multiple resistance sheets can significantly reduce the stress on the resistance sheets under high current, and also prevent the resistance sheets from shifting. The elastic modulus of the corrugated sheet is set to be greater than or equal to 68GPa and less than or equal to 72GPa, and the appropriate deformation of the corrugated sheet helps to absorb the stress generated by the resistance sheet under high current, reduce cracking or breaking of the resistance sheet, and also reduce displacement of the resistance sheet, providing axial support. Adding springs to both ends of the stacked resistance sheets mainly provides stable mechanical pressure and adapts to environmental factors such as thermal expansion and vibration, ensuring reliable electrical contact of the resistance sheet during long-term operation. The pressure bonding force of the aluminum block and the core rod is set to be in the interval range of 5-12MPa, which can cause plastic deformation of the contact surface of the aluminum block and the core rod, forming reliable mechanical interlocking and metallurgical bonding, and reducing poor contact or excessive deformation caused by poor pressure bonding. By setting the difference between the inner ring size of the aluminum block and the inner diameter of the resistance sheet to be in the interval range of 0.5mm-5mm, the contact friction between the resistance sheet and the core rod can be reduced, thereby significantly improving the reliability, safety and service life of the lightning protection insulator. Wrapping adhesive tape on the resistance sheet before gluing can be used to optimize electrical performance, improve mechanical stability, improve process compatibility, and reduce long-term operation risks.

[0056] The above description is merely a specific implementation of the disclosure, enabling those skilled in the art to understand or implement the disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the disclosure. Therefore, the disclosure will not be limited to these embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An assembly method for lightning protection insulators of 500kV and above, characterized in that, include: Step S1: Stack multiple resistor sheets together; Step S2: Wrap adhesive tape around the stacked resistor sheet; Step S3: Add springs and aluminum blocks to both the top and bottom ends of the stacked resistor sheet, and insert the mandrel into the inner ring of the stacked resistor sheet. Press and shape the aluminum block and the mandrel to form the first section. Step S4: The lifting device raises the first section to a set height, and repeats steps S1 to S3 to continue forming the next section below the first section until the lightning protection insulator core is assembled. Step S5: The overhead crane fixes the annular barrel onto the inner core of the lightning protection insulator; Step S6: Apply glue to the gap between the annular barrel and the inner core of the lightning protection insulator, and then bake it to complete the production of the lightning protection insulator.

2. The assembly method of the lightning protection insulator as described in claim 1, characterized in that, The stacking of multiple resistor sheets includes: A corrugated sheet is added between at least some of the adjacent resistor sheets in a plurality of resistor sheets, the corrugated sheet being in direct contact with the resistor sheets, the outer diameter of the corrugated sheet being 0.5mm-1mm smaller than the outer diameter of the resistor sheets, and the inner diameter of the corrugated sheet being 0.5mm-1mm larger than the inner diameter of the resistor sheets.

3. The assembly method of the lightning protection insulator as described in claim 2, characterized in that, The elastic modulus of the corrugated sheet is greater than or equal to 68 GPa and less than or equal to 72 GPa.

4. The assembly method of the lightning protection insulator as described in claim 1, characterized in that, The spring is a linear spring.

5. The assembly method of the lightning protection insulator as described in claim 1, characterized in that, The aluminum block and the mandrel are pressed together using a pressing force of 5-12 MPa.

6. The assembly method of the lightning protection insulator as described in claim 1, characterized in that, The inner ring size of the aluminum block is 0.5mm-5mm smaller than the inner diameter of the resistor sheet.

7. The assembly method of the lightning protection insulator as described in claim 1, characterized in that, The length of the lightning protection insulator is greater than or equal to 3m.

8. The assembly method of the lightning protection insulator as described in claim 1, characterized in that, The tape includes insulating tape.

9. An assembly device for lightning protection insulators of 500kV and above, characterized in that, The lightning protection insulator is assembled using the assembly method described in any one of claims 1-8, comprising: a winding table, a lifting device, a crimping machine, and a steel structure main body, wherein, The lifting device is located inside the main steel structure, the winding table is located on one side of the main steel structure, and the crimping machine is fixed on the main steel structure near the winding table.

10. The assembly device for lightning protection insulators as described in claim 9, characterized in that, The lifting device is configured to drive the first section to rise vertically relative to the main steel structure to a preset height.

Images