Light emitting diode and manufacturing method thereof, and display device

Abstract

The application discloses an electrode fixing structure for a lightning arrester, which comprises an insulating cylinder, electrodes arranged at both ends of the insulating cylinder, and an outer insulating umbrella cover wrapped outside the insulating cylinder, the electrode has an electrode boss part inserted into an end hole of the insulating cylinder and in interference fit with the insulating cylinder, and a glue layer is arranged between the electrode boss part and the inner wall of the insulating cylinder. The electrode boss part of the electrode is in interference fit with the insulating cylinder, the outer circumferential surface of the electrode boss part is coated with glue, a glue layer is formed between the electrode boss part and the inner wall of the insulating cylinder, the electrode can be fastened on the insulating cylinder, the inner environment of the insulating cylinder is well protected from the sealing performance, and the invasion of moisture is prevented from causing insulation failure in the insulating cylinder or damage to the resistance sheet. Moreover, the interference fit assembly difficulty is far less than that of a conventional threaded structure, the production time is shorter, the production efficiency is higher, and the automatic production is more favorable. The application further discloses a lightning arrester and a lightning arrester preparation method.

Description

Technical Field

[0001] This invention relates to the field of surge arrester technology, and in particular to a surge arrester, an electrode fixing structure, and a surge arrester manufacturing method. Background Technology

[0002] Surge arresters are protective devices for power transmission. They can quickly and effectively suppress lightning strikes, switching overvoltages, and other transient overvoltages to protect other equipment in the power network from damage. Therefore, they are the most common preventative measure for power equipment. With the ongoing power grid transformation, gapless metal oxide surge arresters have been widely used due to their excellent electrical performance.

[0003] The main body of a gapless metal oxide surge arrester is a core composed of zinc oxide resistive elements. Surge protection is achieved by utilizing the excellent nonlinear volt-ampere characteristics of the resistive elements. When a lightning overvoltage occurs, the surge arrester exhibits low resistance to discharge. After the discharge is completed, the surge arrester returns to a high resistance state, thus disengaging the discharge path.

[0004] Currently, the main structural forms of gapless metal oxide surge arresters are classified into porcelain bushing type and composite jacket type based on their external insulation. Among them, the composite jacket type gapless metal oxide surge arrester refers to a gapless metal oxide surge arrester with a polymer or composite material as the insulating jacket, commonly using silicone rubber and FRP (Fiber Reinforced Polymer / Plastic) as the jacket. Its weight is much lower than that of porcelain jacket surge arresters, making it easier to handle during transportation and installation, and it is widely used in line protection.

[0005] The tubular structure is a typical structure for low-voltage composite-insulated surge arresters. The resistor element is directly installed inside the insulating tube and pressed by a spring. Metal end blocks are connected to both ends of the insulating tube, and the assembled core is molded into a silicone rubber jacket in one piece.

[0006] The common form of tubular structure is to machine internal threads on the inner surface of both ends of the insulating tube and assemble it with the external threads on the electrode. Its production cost is high, the installation time is long, and the sealing performance cannot be guaranteed after being subjected to mechanical stress during long-term online operation.

[0007] In addition, the electrical contact between the spring and the parts it contacts is not stable enough. After repeated impacts from high-energy mechanical stress, poor circuit contact or even no conduction may occur, affecting the long-term operational reliability of the product.

[0008] Therefore, how to facilitate assembly, improve production efficiency, and ensure sealing performance after long-term operation are technical problems that need to be solved by those skilled in the art. Summary of the Invention

[0009] In view of this, the core of the present invention is to provide an electrode fixing structure for surge arresters, so as to facilitate assembly, improve production efficiency, and ensure sealing performance after long-term operation.

[0010] Another core aspect of this invention is to provide a surge arrester employing the above-mentioned electrode fixing structure for surge arresters, as well as a method for manufacturing the surge arrester.

[0011] To achieve the above objectives, the present invention provides the following technical solution:

[0012] An electrode fixing structure for a surge arrester includes an insulating cylinder, electrodes disposed at both ends of the insulating cylinder, and an outer insulating umbrella sleeve covering the outside of the insulating cylinder. At least one of the electrodes has an electrode boss portion that is inserted into an end hole of the insulating cylinder and is interference-fitted with the insulating cylinder. An adhesive layer is disposed between the electrode boss portion and the inner wall of the insulating cylinder.

[0013] Optionally, in the above-mentioned electrode fixing structure for surge arresters, the interference fit between the electrode boss and the insulating cylinder is greater than or equal to 0.05 mm and less than or equal to 0.15 mm.

[0014] Optionally, in the above-mentioned electrode fixing structure for surge arresters, the electrode has an electrode waist portion exposed outside the insulating cylinder, and the outer contour surface of the electrode waist portion is coplanar with the outer contour surface of the insulating cylinder.

[0015] Optionally, in the above-mentioned electrode fixing structure for surge arresters, the outer insulating sheath covers the outside of the electrode waist.

[0016] Optionally, in the above-mentioned electrode fixing structure for surge arresters, a sealing groove is provided on the outer peripheral surface of the electrode boss and / or the outer peripheral surface of the electrode waist.

[0017] Optionally, in the above-mentioned electrode fixing structure for surge arresters, the electrode has an exposed portion that is exposed outside the outer insulating sheath, and the outer contour surface of the exposed portion is coplanar with the minimum outer contour surface of the outer insulating sheath.

[0018] The electrode fixing structure for surge arresters provided by this invention uses an interference fit between the electrode boss and the insulating cylinder, and applies adhesive to the outer circumferential surface of the electrode boss to form an adhesive layer between the electrode boss and the inner wall of the insulating cylinder. Compared with the threaded fit in the prior art, this invention can firmly fix the electrode to the insulating cylinder, forming a good seal to protect the internal environment of the insulating cylinder and preventing moisture intrusion that could cause insulation failure or damage to the resistor element. Moreover, the assembly difficulty of the interference fit is much lower than that of the traditional threaded structure, resulting in shorter production time, less manpower required, higher production efficiency, and greater suitability for automated production.

[0019] A surge arrester includes electrodes, an insulating cylinder, an outer insulating sheath, and a core assembly disposed within the insulating cylinder. The electrodes are fixed by an electrode fixing structure for surge arresters as described in any of the preceding claims, and the core assembly is located between the electrodes at both ends of the insulating cylinder.

[0020] Optionally, in the above-mentioned surge arrester, the core assembly includes a resistor sheet disposed inside the insulating cylinder and an elastic adjustment assembly located between the resistor sheet and at least one of the electrodes. The elastic adjustment assembly includes a metal spring and a conductive strip connected to both ends of the metal spring.

[0021] Optionally, in the above-mentioned surge arrester, the core assembly further includes a metal gasket disposed between the elastic adjustment assembly and the resistor sheet.

[0022] The surge arrester provided by the present invention, because it adopts the above-mentioned electrode fixing structure for surge arresters, has all the technical effects of the above-mentioned electrode fixing structure for surge arresters, which will not be repeated here.

[0023] A method for manufacturing a surge arrester includes the following steps:

[0024] After applying adhesive to the electrode protrusion of one of the electrodes, it is pressed into one end of the insulating cylinder by static force.

[0025] The resistor, metal pad, and elastic adjustment assembly are stacked sequentially into the insulating cylinder;

[0026] After applying adhesive to the electrode protrusion of the other electrode, it is pressed into the other end of the insulating cylinder by static force.

[0027] The outer insulating umbrella sleeve is injection molded and vulcanized on the outside of the insulating cylinder.

[0028] The surge arrester manufacturing method provided by this invention, since it is used to manufacture the surge arrester described above, has all the technical effects of the surge arrester described above, and will not be repeated here. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the surge arrester disclosed in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the upper electrode structure disclosed in an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of the lower electrode disclosed in an embodiment of the present invention.

[0033] Figures 1 to 3 The meanings of the various reference numerals in the attached figures are as follows:

[0034] 1 is the upper double-slot screw, 2 is the upper electrode, 3 is the insulating cylinder, 4 is the elastic adjustment component, 5 is the metal washer, 6 is the resistance element, 7 is the outer insulating umbrella sleeve, 8 is the lower electrode, and 9 is the lower double-slot screw.

[0035] 201 is the exposed part of the upper electrode, 202 is the waist part of the upper electrode, and 203 is the boss part of the upper electrode.

[0036] 401 is a metal spring, and 402 is a conductive strip;

[0037] 801 is the exposed part of the lower electrode, 802 is the waist part of the lower electrode, and 803 is the boss part of the lower electrode. Detailed Implementation

[0038] The core of this invention is to provide an electrode fixing structure for surge arresters, which facilitates assembly, improves production efficiency, and ensures sealing performance after long-term operation.

[0039] Another core aspect of this invention is to provide a surge arrester employing the above-mentioned electrode fixing structure for surge arresters, as well as a method for manufacturing the surge arrester.

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] like Figures 1-3 As shown in the figure, this embodiment of the invention discloses an electrode fixing structure for a surge arrester, focusing on the cooperation relationship between the electrode and other components of the surge arrester.

[0042] The surge arrester electrode fixing structure disclosed in this embodiment of the invention includes an insulating cylinder 3, electrodes, and an outer insulating sheath 7. The electrodes include an upper electrode 2 and a lower electrode 8 respectively disposed at both ends of the insulating cylinder 3. The upper electrode 2 is generally provided with an upper double-slot screw 1, and the corresponding lower electrode 8 is generally provided with a lower double-slot screw 9. The upper double-slot screw 1 and the lower double-slot screw 9 are the wiring terminals of the surge arrester to facilitate electrical connection with external equipment.

[0043] The outer insulating sheath 7 covers the outside of the insulating cylinder 3. The outer insulating sheath 7 is a component of the external insulation of the surge arrester. It is an insulating component for suspending conductors on transmission lines. It is usually made by smelting insulating rubber material through a special mold and vulcanizing under pressure and temperature.

[0044] At least one electrode has an electrode boss that inserts into an end hole in the insulating cylinder 3. Optionally, the upper electrode 2 has an upper electrode boss 203 that inserts into an end hole at the upper end of the insulating cylinder 3, and the lower electrode 8 has a lower electrode boss 803 that inserts into an end hole at the lower end of the insulating cylinder 3. The upper electrode boss 203 and the lower electrode boss 803 may have the same or different lengths, depending on the specific application scenario. To improve the production efficiency of the surge arrester, it is preferable to select an upper electrode 2 and a lower electrode 8 with identical structures. This allows for the production of only one specification of motor, eliminating concerns about assembly errors, reducing costs, and improving assembly efficiency.

[0045] At least one electrode at one end of the insulating cylinder 3 has an electrode boss that is interference-fitted with the insulating cylinder 3, meaning that at least one electrode is connected to the insulating cylinder 3 via an interference fit, rather than via a conventional threaded connection. Optionally, both the upper electrode 2 and the lower electrode 8 at both ends of the insulating cylinder 3 can be connected to the insulating cylinder 3 via an interference fit. Alternatively, only one electrode can be connected to the insulating cylinder 3 via an interference fit; for example, the upper electrode boss 203 of the upper electrode 2 is interference-fitted with the end hole at the upper end of the insulating cylinder 3, while the lower electrode boss 803 of the lower electrode 8 is connected to the end hole at the lower end of the insulating cylinder 3 via a threaded fit. Those skilled in the art will understand that as long as at least one electrode is connected to the insulating cylinder 3 via an interference fit, the beneficial effects of an interference fit can be achieved.

[0046] It should be noted that the larger the interference fit between the electrode boss and the insulating cylinder 3, the better the sealing performance, but the more difficult it is to assemble and the greater the required static pressure for assembly. The smaller the interference fit, the easier it is to assemble and the less required static pressure for assembly, but the worse the sealing performance. The interference fit can be set according to the dimensions of the insulating cylinder 3 and the electrode boss to ensure sealing performance without causing assembly difficulties.

[0047] To further ensure the sealing between the electrode protrusion and the insulating cylinder 3, an adhesive layer can be provided between the electrode protrusion and the inner wall of the insulating cylinder 3. That is, before assembling the electrode into the insulating cylinder 3, adhesive can be applied to the outside of the electrode protrusion, and then the electrode protrusion is pressed into the insulating cylinder 3 by external force. This results in a dual sealing structure between the electrode protrusion and the insulating cylinder 3, namely an interference fit and an adhesive layer, which further improves the sealing effect and enhances structural stability.

[0048] Optionally, when both the upper electrode 2 and the lower electrode 8 at both ends of the insulating cylinder 3 are connected to the insulating cylinder 3 by an interference fit, an adhesive layer is provided between the upper electrode boss 203 of the upper electrode 2 and the insulating cylinder 3, and between the lower electrode boss 803 of the lower electrode 8 and the insulating cylinder 3. When only one electrode is connected to the insulating cylinder 3 by an interference fit, for example, the upper electrode boss 203 of the upper electrode 2 is interference-fitted with the end hole at the upper end of the insulating cylinder 3; while the lower electrode boss 803 of the lower electrode 8 is connected to the end hole at the lower end of the insulating cylinder 3 by a threaded fit. An adhesive layer is provided between the upper electrode boss 203 of the upper electrode 2 and the insulating cylinder 3, and an adhesive layer can also be provided between the lower electrode boss 803 of the lower electrode 8 and the insulating cylinder 3.

[0049] The electrode fixing structure for surge arresters provided by this invention uses an interference fit between the electrode boss and the insulating cylinder 3, and applies adhesive to the outer circumferential surface of the electrode boss to form an adhesive layer between the electrode boss and the inner wall of the insulating cylinder 3. Compared with the threaded fit in the prior art, this invention overcomes technical bias by replacing the threaded fit method, which has been widely used in the prior art for many years, with an interference fit and adhesive application method. In practice, the electrode fixing structure for surge arresters disclosed in this embodiment can firmly fix the electrode to the insulating cylinder 3, forming a good sealing performance to protect the internal environment of the insulating cylinder 3 and prevent moisture intrusion that could cause insulation failure or damage to the resistor sheet 6. Moreover, the assembly difficulty of the interference fit is much lower than that of the traditional threaded structure, requiring only static pressure to press in, resulting in shorter production time, less manpower, higher production efficiency, and greater suitability for automated production.

[0050] In one specific embodiment of the present invention, the interference fit between the electrode boss and the insulating cylinder 3 is greater than or equal to 0.05 mm and less than or equal to 0.15 mm. That is, in one embodiment, the interference fit between the electrode boss and the insulating cylinder 3 is controlled within the range of 0.05 mm to 0.15 mm. Practical verification has shown that in a surge arrester of a specific size, controlling the interference fit within the above-mentioned range ensures both convenient installation and good sealing performance protection for the internal environment of the insulating cylinder 3. It should be noted that the specific size of the interference fit is necessarily related to the specific sizes of the electrode boss and the insulating cylinder 3. That is, the larger the size of the electrode boss and the insulating cylinder 3, the larger the corresponding interference fit can be designed; conversely, the interference fit needs to be designed to be smaller than the above-mentioned size range.

[0051] To further improve the sealing performance of the insulating cylinder 3, in a specific embodiment of the present invention, the electrode has an electrode waist that is exposed outside the insulating cylinder 3, the outer contour surface of the electrode waist is coplanar with the outer contour surface of the insulating cylinder 3, and the outer insulating umbrella sleeve 7 covers the outside of the electrode waist.

[0052] The upper electrode 2 has an upper electrode waist 202, and the lower electrode 8 has a lower electrode waist 802. The end face of the upper electrode waist 202 abuts against the upper end of the insulating cylinder 3, and the end face of the lower electrode waist 802 abuts against the lower end of the insulating cylinder 3. The outer contour surface of the electrode waist is coplanar with the outer contour surface of the insulating cylinder 3, so that the upper electrode waist 202, the lower electrode waist 802, and the insulating cylinder 3 form a smooth cylindrical structure, allowing the outer insulating umbrella sleeve 7 to cover the outside of the upper electrode waist 202 and the lower electrode waist 802 to seal the contact surface between the insulating cylinder 3 and the upper electrode 2 and the lower electrode 8, further improving the sealing performance of the insulating cylinder 3.

[0053] In addition, before installing the upper electrode 2 and the lower electrode 8, adhesive can be applied to the end faces of the upper electrode waist 202 and the lower electrode waist 802 facing the insulating cylinder 3 to seal the gap between the end faces of the upper electrode waist 202 and the lower electrode waist 802 and the end face of the insulating cylinder 3, thereby further improving the sealing performance of the insulating cylinder 3.

[0054] In one specific embodiment of the present invention, a sealing groove is formed on the outer peripheral surface of the electrode boss portion and / or the outer peripheral surface of the electrode waist portion 202. This sealing groove is preferably an annular groove surrounding the outer peripheral surface. For example, a sealing groove surrounding the outer peripheral surface can be formed on the upper electrode boss portion 203 of the upper electrode 2 and the lower electrode boss portion 803 of the lower electrode 8. The number of these sealing grooves can be multiple and spaced apart, or only one can be provided. It should be noted that the sealing groove can be an annular groove surrounding the outer peripheral surface of the electrode boss portion, or it can be multiple discontinuous grooves.

[0055] The present invention provides a sealing groove on the electrode protrusion, which allows for the inclusion of more adhesive layer in the sealing groove. This increases the contact area between the adhesive layer and the electrode protrusion and the insulating cylinder 3, resulting in a tighter fit between the insulating cylinder 3 and the electrode. It also makes the path for moisture to penetrate the internal structure of the insulating cylinder 3 longer and more difficult to penetrate, thereby improving the stability of the surge arrester in humid and polluted environments and increasing its mechanical strength.

[0056] Sealing grooves can also be formed around the outer circumference of the upper electrode waist 202 of the upper electrode 2 and the lower electrode waist 802 of the lower electrode 8. The number of these sealing grooves can be multiple and spaced apart, or only one can be provided. It should be noted that the sealing groove can be an annular groove that surrounds the outer circumference of the electrode waist, or multiple discontinuous grooves that are disconnected from each other.

[0057] By providing a sealing groove on the waist of the electrode, the contact area between the outer insulating sleeve 7 and the waist of the electrode is larger, allowing the outer insulating sleeve 7 to fit tightly against the electrode. This also makes it more difficult for moisture to penetrate the internal structure of the insulating cylinder 3, further improving the stability of the surge arrester in humid and polluted environments and increasing its mechanical strength.

[0058] In one specific embodiment of the present invention, the electrode has an exposed electrode portion that protrudes outside the outer insulating umbrella sleeve 7, and the outer contour surface of the exposed electrode portion is coplanar with the smallest outer contour surface of the outer insulating umbrella sleeve 7. That is, the outer contour surface of the upper electrode exposed portion 201 of the upper electrode 2 is coplanar with the smallest outer contour surface of the outer insulating umbrella sleeve 7, and the outer contour surface of the lower electrode exposed portion 801 of the lower electrode 8 is coplanar with the smallest outer contour surface of the outer insulating umbrella sleeve 7.

[0059] In this embodiment, by making the outer contour surfaces of the exposed upper electrode portion 201 and the exposed lower electrode portion 801 coplanar with the minimum outer contour surface of the outer insulating sheath 7, the outer insulating sheath 7 and the portions of the electrodes exposed outside the outer insulating sheath 7 (exposed upper electrode portion 201 and exposed lower electrode portion 801) are on the same circumferential surface. This ensures that there are no abrupt changes in the steps between the outer insulating sheath 7 and the exposed portions of the electrodes (exposed upper electrode portion 201 and exposed lower electrode portion 801), making it less susceptible to deformation under external forces or impacts, which could lead to gaps in the sealing area and ultimately affect the sealing performance of the arrester after undergoing mechanical stress during long-term online operation.

[0060] like Figure 1 As shown in the figure, this invention also discloses a surge arrester, including an electrode, an insulating cylinder 3, an outer insulating sheath 7, and a core assembly disposed within the insulating cylinder 3. The electrode is fixed by the surge arrester electrode fixing structure disclosed in the above embodiment, and the core assembly is located between the upper electrode 2 and the lower electrode 8. The surge arrester disclosed in this invention, due to the adoption of the above-mentioned surge arrester electrode fixing structure, possesses all the technical effects of the above-mentioned surge arrester electrode fixing structure, which will not be elaborated further here.

[0061] In one specific embodiment of the present invention, the core assembly includes a resistor 6 disposed within an insulating cylinder 3 and an elastic adjustment assembly 4 located between the resistor 6 and at least one electrode. Figure 1 In the illustrated embodiment, the elastic adjustment component 4 is located between the resistive sheet 6 and the upper electrode 2. It should be noted that the elastic adjustment component 4 can also be located between the resistive sheet 6 and the lower electrode 8. Of course, the elastic adjustment component 4 can also be located between the resistive sheet 6 and the lower electrode 8, and between the resistive sheet 6 and the upper electrode 2. Three or more resistive sheets 6 are used; the specific number of resistive sheets 6 can be selected according to the actual application scenario.

[0062] The elastic adjustment component 4 includes a metal spring 401 and conductive strips 402 connected to both ends of the metal spring 401. To ensure electrical continuity, multiple conductive strips 402 can be provided and evenly distributed around the outer periphery of the metal spring 401. For example, two conductive strips 402 can be provided and symmetrically arranged on both sides of the metal spring 401. The even distribution of the conductive strips 402 not only facilitates automated production but also achieves a more stable conductivity.

[0063] Those skilled in the art will understand that, without considering the above effects, the arrangement of multiple conductive strips 402 can be arbitrarily set according to the actual situation. Of course, only one conductive strip 402 can also be set.

[0064] The conductive strip 402 has a better conductivity than the metal spring 401. The two ends of the conductive strip 402 are respectively wrapped around the two ends of the metal spring 401. When the metal spring 401 is placed between the resistor 6 and the electrode, taking the resistor 6 and the upper electrode 2 as an example, the two ends of the conductive strip 402 are electrically connected to the upper electrode 2 and the resistor 6 respectively. Under the action of the metal spring force of the metal spring 401, the two ends of the conductive strip 402 are pressed tightly onto the upper electrode 2 and the resistor 6 respectively, so that a good electrical path is formed from the upper electrode 2 to the resistor 6.

[0065] The metal spring 401 tightly presses all the parts inside the insulating cylinder 3 together, preventing shaking or displacement. Even after long-term online operation and mechanical vibration, it can still maintain good electrical performance, effectively improving the service life and operational reliability of the surge arrester.

[0066] The metal spring 401 can be made of carbon steel or other metal materials with good electrical conductivity, and the conductive strip 402 can be made of copper or other metal materials with good electrical conductivity and elasticity.

[0067] The core assembly may also include a metal pad 5 disposed between the elastic adjustment component 4 and the resistive sheet 6. In this embodiment, by providing a metal pad 5 between the resistive sheet 6 and the elastic adjustment component 4, the preload of the metal spring 401 can be adjusted according to the number and thickness of the metal pad 5 to ensure good electrical performance. The metal pad 5, the upper electrode 2, and the lower electrode 8 are generally made of aluminum to improve electrical performance.

[0068] This invention also discloses a method for manufacturing a surge arrester, used to manufacture the surge arrester disclosed in the above embodiments, comprising the following steps:

[0069] 1) After applying adhesive to the electrode protrusion 203 of one of the electrodes, it is pressed into one end of the insulating cylinder 3 by static pressure; the lower electrode 8 can be installed first. After applying adhesive to the outer circumferential surface of the lower electrode protrusion 803 of the lower electrode 8, it is pressed into the lower end of the insulating cylinder 3 by static pressure. The lower electrode protrusion 803 is interference-fitted with the hole of the insulating cylinder 3. The resistance caused by the interference is overcome by static pressure, and the lower electrode protrusion 803 of the lower electrode 8 is pressed into the lower end hole of the insulating cylinder 3.

[0070] 2) The resistor 6, the metal pad 5, and the elastic adjustment assembly are stacked in the insulating cylinder 3 in sequence, so that the resistor 6 abuts against the lower electrode protrusion 803 of the lower electrode 8 to form electrical conduction.

[0071] 3) After applying adhesive to the electrode protrusion of the other electrode, press it into the other end of the insulating cylinder 3 by static pressure; that is, after applying adhesive to the outer circumferential surface of the upper electrode protrusion 203 of the upper electrode 2, press it into the upper end of the insulating cylinder 3 by static pressure. The upper electrode protrusion 203 is interference-fitted with the hole of the insulating cylinder 3. The resistance caused by the interference is overcome by static pressure, and the upper electrode protrusion 203 of the upper electrode 2 is pressed into the upper end hole of the insulating cylinder 3.

[0072] 4) The outer insulating sleeve 7 is injection molded and vulcanized on the outside of the insulating cylinder 3. Since the injection molding and vulcanization of the outer insulating sleeve 7 is the same as the existing technology, it will not be described in detail here.

[0073] For details on the coordination relationships between the various components of the surge arrester, as well as the structural characteristics of each component, please refer to the content disclosed in the above embodiments.

[0074] The surge arrester manufacturing method provided by this invention, since it is used to manufacture the surge arrester described above, has all the technical effects of the surge arrester described above, and will not be repeated here.

[0075] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0076] It should be understood that the use of terms such as "system," "device," "unit," and / or "module" in this application is merely one method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0077] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0078] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0079] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying 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.

[0080] If a flowchart is used in this application, it is used to illustrate the operations performed by the system according to embodiments of this application. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, the steps can be processed in reverse order or simultaneously. Furthermore, other operations can be added to these processes, or one or more steps can be removed from them.

[0081] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An electrode fixing structure for a surge arrester, characterized in that, It includes an insulating cylinder (3), electrodes disposed at both ends of the insulating cylinder (3), and an outer insulating umbrella sleeve (7) covering the outside of the insulating cylinder (3). At least one of the electrodes has an electrode boss portion that is inserted into the end hole of the insulating cylinder (3) and is interference-fitted with the insulating cylinder (3). An adhesive layer is disposed between the electrode boss portion and the inner wall of the insulating cylinder (3). The electrode has an electrode waist that is exposed outside the insulating cylinder (3), and the outer contour surface of the electrode waist is coplanar with the outer contour surface of the insulating cylinder (3); The outer insulating umbrella sleeve (7) covers the outside of the electrode waist; The outer peripheral surface of the electrode boss and the outer peripheral surface of the electrode waist are provided with sealing grooves; The electrode includes an upper electrode (2) and a lower electrode (8) respectively disposed at both ends of the insulating cylinder (3). The upper electrode (2) has an upper electrode boss (203) inserted into the end hole at the upper end of the insulating cylinder (3), and the lower electrode (8) has a lower electrode boss (803) inserted into the end hole at the lower end of the insulating cylinder (3).

2. The electrode fixing structure for a surge arrester according to claim 1, characterized in that, The interference fit between the electrode boss and the insulating cylinder (3) is greater than or equal to 0.05 mm and less than or equal to 0.15 mm.

3. The electrode fixing structure for a surge arrester according to claim 1, characterized in that, The electrode has an exposed portion that is outside the outer insulating umbrella sleeve (7), and the outer contour surface of the exposed portion is coplanar with the minimum outer contour surface of the outer insulating umbrella sleeve (7).

4. A surge arrester, characterized in that, It includes electrodes, an insulating cylinder (3), an outer insulating umbrella sleeve (7), and a core assembly disposed within the insulating cylinder (3). The electrodes are fixed by an electrode fixing structure for a surge arrester as described in any one of claims 1-3, and the core assembly is located between the electrodes at both ends of the insulating cylinder (3).

5. The surge arrester according to claim 4, characterized in that, The core assembly includes a resistive sheet (6) disposed inside the insulating cylinder (3) and an elastic adjustment assembly (4) located between the resistive sheet (6) and at least one of the electrodes. The elastic adjustment assembly (4) includes a metal spring (401) and a conductive strip (402) connected to both ends of the metal spring (401).

6. The surge arrester according to claim 5, characterized in that, The core assembly also includes a metal pad (5) disposed between the elastic adjustment assembly and the resistive sheet (6).

7. A method for manufacturing a surge arrester, characterized in that, The method for manufacturing the surge arrester as described in claim 6 includes the following steps: After applying glue to the electrode protrusion of one of the electrodes, it is pressed into one end of the insulating cylinder (3) by static force. The resistor (6), metal pad (5) and elastic adjustment assembly are stacked in sequence into the insulating cylinder (3); After applying glue to the electrode protrusion of the other electrode, it is pressed into the other end of the insulating cylinder (3) by static force. The outer insulating umbrella sleeve (7) is injection molded and vulcanized on the outside of the insulating cylinder (3).

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