Lightning arrester and gap two-component glue filling sealing method

Abstract

The invention relates to the field of lightning arresters, and discloses a lightning arrester, which comprises a core body, a winding type insulating cylinder, a first locking electrode, a second locking electrode, a silica gel umbrella-shaped outer sleeve, a first sealed positioning electrode and a second sealed positioning electrode, and is characterized in that the core body is positioned through the first sealed positioning electrode and the second sealed positioning electrode; the first sealing type positioning electrode and the second sealing type positioning electrode are provided with V-shaped sealing grooves and are in sealing connection with the core body through a thermal shrinkage process after being coated with sealant, and the winding type insulating cylinder is used for wrapping the core body and is filled with bi-component sealant. Through sealed connection of the first sealed positioning electrode, the second sealed positioning electrode and the smeared sealant, invasion of moisture and pollutants can be effectively prevented, and residual air and bubbles are eliminated through cooperation with the synergistic effect of the sealant injection port and the suction port, so that the sealant is uniformly distributed in the winding type insulating cylinder, and the sealing performance is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning arresters, and specifically to a lightning arrester and a method for gap two-component potting and sealing. Background Art

[0002] Currently, as a key protection device widely used in power systems, the main function of a lightning arrester is to limit the amplitude of overvoltage and protect power equipment from lightning and switching overvoltage damage.

[0003] During the processing, in order to prevent the internal core group from getting damp, epoxy resin glue is usually poured into the lightning arrester to encapsulate the core group. For the needs of potting and suction exhaust, air extraction holes are opened on the electrodes at both ends of the lightning arrester, and after potting, a seal is used to block the air extraction holes. However, in this potting and moisture-proof process of the lightning arrester, the potting process is difficult to control, and it is easy to generate more bubbles inside the epoxy resin glue. Often, the bubbles inside the epoxy resin glue cannot be completely discharged within the specified time, resulting in partial discharge effects of varying degrees during long-term use. And if the position of the air extraction hole is not blocked tightly, it will become a moisture intrusion point for the entire lightning arrester, posing a certain hidden danger to the safe operation of the lightning arrester. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a lightning arrester and a method for gap two-component potting and sealing, which solve the problems of insufficient sealing performance, poor mechanical stability, and low insulation reliability existing in traditional lightning arresters.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A lightning arrester includes a core body, a wound insulating cylinder, a first locking electrode, a second locking electrode, a silicone umbrella-shaped outer sleeve, a first sealed positioning electrode, and a second sealed positioning electrode. The core body is positioned by the first sealed positioning electrode and the second sealed positioning electrode. The first sealed positioning electrode and the second sealed positioning electrode are provided with V-shaped sealing grooves, and after applying sealant, they are hermetically connected to the core body through a heat shrinkage process. The wound insulating cylinder is used to wrap the core body, and its interior is filled with a two-component sealant, and both ends are hermetically connected by the first locking electrode and the second locking electrode. The outer walls of the first locking electrode and the second locking electrode are provided with trapezoidal threads, and their surfaces are coated with sealed electric grease; The silicone umbrella-shaped outer sleeve is integrally connected to the wound insulating cylinder after vulcanization to form an external sealing protection.

[0006] Preferably, an annular sealing groove is opened on one side of the first locking electrode and the second locking electrode, and an overflow groove is opened on the outer wall for hermetically connecting the wound insulating cylinder and discharging excess sealant.

[0007] Preferably, glue injection ports and suction ports are provided on opposite sides of the first locking electrode and the second locking electrode. Sealing check valves are installed on the inner walls of the glue injection ports and the suction ports to exhaust the gas in the cylinder and prevent air from flowing back.

[0008] Preferably, an insulating component is installed between the core body and the wound insulating cylinder to enhance the electrical insulation performance of the arrester and avoid the breakdown risk under internal high-voltage conditions.

[0009] Preferably, a preloading spring is provided between the second sealed positioning electrode and the first locking electrode to apply an axial pressure to the core body to prevent structural loosening caused by long-term operation.

[0010] Preferably, the silicone umbrella-shaped outer sheath is made of weather-resistant silicone material, has the properties of moisture-proof, ultraviolet-proof and anti-mechanical impact, and is integrally connected with the wound insulating cylinder through high-temperature vulcanization.

[0011] Preferably, the glue overflow groove is opened on the outer walls of the first locking electrode and the second locking electrode to facilitate the discharge of excess sealant.

[0012] Preferably, the glue injection port is connected to a vacuum negative pressure device for injecting two-component sealant, and the suction port is used to exhaust the air in the cylinder.

[0013] Preferably, the surface of the wound insulating cylinder is evenly coated with vulcanization aids to enhance its adhesion performance with the silicone umbrella-shaped outer sheath.

[0014] The gap two-component glue injection sealing method includes the following steps: Position the core body through the first sealed positioning electrode and the second sealed positioning electrode, apply sealant and then seal it by heat shrinkage process; Connect the first locking electrode and the second locking electrode to the wound insulating cylinder respectively, and apply an axial pressure to the core body through the preloading spring; Inject two-component sealant under the action of vacuum negative pressure through the glue injection port, exhaust the air in the cylinder and fill it evenly; Use a sealing nut to block the glue injection port and the suction port; Coat the wound insulating cylinder and the silicone umbrella-shaped outer sheath with vulcanization aids, and form an integrated sealing structure through high-temperature vulcanization.

[0015] The present invention provides an arrester and a gap two-component glue injection sealing method. It has the following beneficial effects: 1. Through the V-shaped sealing groove design of the first sealed positioning electrode and the second sealed positioning electrode in the present invention, and the sealed connection with the core body by using the heat shrinkage process after applying sealant, a high degree of sealing of the internal core structure is achieved, which can effectively prevent the intrusion of moisture and pollutants. In combination with the vacuum negative pressure injection process of the two-component sealant, through the coordinated action of the injection port and the suction port, residual air and bubbles are removed, and the sealant is evenly distributed inside the wound insulating cylinder, greatly improving the sealing performance and effectively preventing insulation defects or partial discharge caused by bubbles.

[0016] 2. Through the pre-pressure spring arranged between the second sealed positioning electrode and the core body in the present invention, a stable axial pressure is applied to the core body during operation, preventing structural loosening or position deviation caused by thermal expansion, vibration or long-term use, thereby improving the mechanical stability of the lightning arrester. At the same time, the first locking electrode and the second locking electrode with trapezoidal thread structure provide a firm connection through high-precision mechanical locking, further enhancing the seismic performance of the device.

[0017] 3. The design of the injection port and the suction port in the present invention enables the two-component sealant to be quickly injected into the wound insulating cylinder through a vacuum negative pressure device. At the same time, the suction port removes the air and residual gas in the cylinder, forming a bubble-free and uniform injection layer, significantly improving the injection efficiency. The setting of the overflow groove prevents the accumulation of excess colloid at the position of the locking electrode, avoids the problem of uneven sealing, and improves the reliability and production efficiency of the sealing process. Brief Description of the Drawings

[0018] Figure 1 It is a schematic cross-sectional view of the silicone umbrella-shaped outer casing of the present invention; Figure 2 It is a schematic structural view of the first sealed positioning electrode of the present invention; Figure 3 It is a schematic structural view of the overflow groove of the present invention; Figure 4 It is a schematic structural view of the second sealed positioning electrode of the present invention; Figure 5 It is a schematic view of the setting of the overflow groove on the second sealed positioning electrode of the present invention; Figure 6 It is a schematic structural view of the annular sealing groove of the present invention; Figure 7 It is a schematic structural view of the second locking electrode of the present invention; Figure 8 It is a schematic top view of the second locking electrode of the present invention; Figure 9 It is a schematic view of the method steps of the present invention.

[0019] Among them, 1. Silicone umbrella-shaped outer sleeve; 2. Wound insulating cylinder; 3. Two-component sealant; 4. Core body; 5. First locking electrode; 6. Sealing nut; 7. Glue injection port; 8. Sealing check valve; 9. Preloading spring; 10. Second sealed positioning electrode; 11. First sealed positioning electrode; 12. Insulating part; 13. Suction port; 14. Second locking electrode; 15. Glue overflow groove; 16. V-shaped sealing groove; 17. Annular sealing groove; 18. Trapezoidal thread. Detailed implementation mode

[0020] Next, in combination with the drawings of the present invention, the technical solutions of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

[0021] Please refer to the attached Figure 2 - attached Figure 4 , the embodiment of the present invention provides a lightning arrester, including a core body 4, a wound insulating cylinder 2, a first locking electrode 5, a second locking electrode 14, a silicone umbrella-shaped outer sleeve 1, a first sealed positioning electrode 11, and a second sealed positioning electrode 10. The core body 4 is positioned by the first sealed positioning electrode 11 and the second sealed positioning electrode 10. The first sealed positioning electrode 11 and the second sealed positioning electrode 10 are provided with a V-shaped sealing groove 16, and after applying sealant, they are hermetically connected to the core body 4 through a heat shrinkage process; a preloading spring 9 is provided between the second sealed positioning electrode 10 and the first locking electrode 5, which is used to apply an axial pressure to the core body 4 to prevent structural loosening caused by long-term operation.

[0022] Specifically, the core body 4 is positioned by the first sealed positioning electrode 11 and the second sealed positioning electrode 10. The connecting surface of the first sealed positioning electrode 11 is provided with a V-shaped sealing groove 16, and the V-shaped sealing groove 16 is used to accommodate sealant. After the positioning electrode is assembled, the sealant is evenly applied in the sealing groove, and through the heat shrinkage process, the sealant shrinks under the heating condition and tightly fits with the surface of the core body 4 to form a highly reliable sealing structure, which can effectively prevent moisture intrusion and sealing failure. The positioning end of the second sealed positioning electrode 10 is in contact with the bottom surface of the core body 4, and the stable connection between the core body 4 and the positioning electrode is ensured through high-precision fitting. At the same time, a preloading spring 9 is installed between the second sealed positioning electrode 10 and the first locking electrode 5. The preloading spring 9 keeps the core body 4 in a constant pressure state by applying axial force, so as to prevent structural loosening or position deviation caused by factors such as vibration and thermal expansion during long-term use, and ensure the safety and stability of the operation of the lightning arrester.

[0023] Please refer to the attached Figure 5, the inner cavity of the wound insulating cylinder 2 wraps the core body 4, and its two ends are connected to the wound insulating cylinder 2 through the first locking electrode 5 and the second locking electrode 14. The first locking electrode 5 and the second locking electrode 14 adopt the trapezoidal thread 18 structure, and the electrode is mechanically locked with the wound insulating cylinder 2 by screwing. An annular sealing groove 17 is machined on the electrode end face, and a sealing electric grease is filled in the annular sealing groove 17. After locking, the airtightness is further improved. The overflow groove 15 is designed to exclude excess sealant during the injection process, ensuring that the sealant is evenly distributed and there is no bubble residue, thereby improving the sealing effect and operation reliability.

[0024] The outside of the wound insulating cylinder 2 is covered with a silica gel umbrella-shaped outer sleeve 1. The silica gel umbrella-shaped outer sleeve 1 and the insulating cylinder are subjected to high-temperature vulcanization treatment after coating with vulcanization aids. After being integrally formed, a complete external protection structure is formed. The silica gel umbrella-shaped outer sleeve 1 has excellent moisture-proof, anti-aging and anti-environmental corrosion properties, and can effectively isolate the influence of rain, moisture, dust, etc. in the external environment on the internal structure, thereby improving the service life and long-term operation performance of the lightning arrester.

[0025] Please refer to the appendix Figure 1 , the wound insulating cylinder 2 is used to wrap the core body 4, and its interior is filled with a two-component sealant 3. The two ends are hermetically connected through the first locking electrode 5 and the second locking electrode 14. Trapezoidal threads 18 are provided on the outer walls of the first locking electrode 5 and the second locking electrode 14, and a sealing electric grease is coated on their surfaces. The surface of the wound insulating cylinder 2 is evenly coated with vulcanization aids.

[0026] The silica gel umbrella-shaped outer sleeve 1 is integrally connected to the wound insulating cylinder 2 after vulcanization to form an external sealing protection. The silica gel umbrella-shaped outer sleeve 1 is made of weather-resistant silica gel material, has the properties of moisture-proof, anti-ultraviolet and anti-mechanical impact, and is integrally connected to the wound insulating cylinder 2 through high-temperature vulcanization.

[0027] Specifically, the wound insulating cylinder 2 is used to wrap the core body 4, and its interior is filled with a two-component sealant 3. The two-component sealant 3 is evenly injected into the internal space of the wound insulating cylinder 2 through a vacuum negative pressure injection process to ensure that the colloid completely covers the outer surface of the core body 4. The two ends are hermetically connected through the first locking electrode 5 and the second locking electrode 14. Trapezoidal threads 18 are provided on the outer walls of the first locking electrode 5 and the second locking electrode 14. The design of the trapezoidal thread 18 can provide a reliable mechanical locking force during the tightening process. At the same time, a sealing electric grease is coated on its surface, and the sealing electric grease and the thread structure form a good airtight effect, further preventing the infiltration of external moisture or other media.

[0028] The surface of the wound insulating cylinder 2 is evenly coated with a vulcanization aid, which can enhance the bonding force between the silicone umbrella-shaped outer sheath 1 and the wound insulating cylinder 2, ensuring the stability and durability of the subsequent vulcanization process. After high-temperature vulcanization, the silicone umbrella-shaped outer sheath 1 is integrally connected to the wound insulating cylinder 2 to form an integrated external sealing and protection structure. The silicone umbrella-shaped outer sheath 1 is made of weather-resistant silicone material, with excellent moisture-proof, ultraviolet-proof, and anti-mechanical impact properties. At the same time, the umbrella-shaped design can effectively guide rainwater and moisture to slide along the umbrella skirt, reducing the erosion of the external environment on the internal structure.

[0029] Please refer to the appendix Figure 6 - appendix Figure 7 As shown in the figure, on one side of the first locking electrode 5 and the second locking electrode 14, there is an annular sealing groove 17, and on the outer wall, there is an overflow groove 15 for sealing and connecting the wound insulating cylinder 2 and discharging excess sealant. The overflow groove 15 is provided on the outer walls of the first locking electrode 5 and the second locking electrode 14, facilitating the discharge of excess sealant.

[0030] Specifically, on one side of the first locking electrode 5 and the second locking electrode 14, there is an annular sealing groove 17. The annular sealing groove 17 cooperates with the coated sealing electric grease to form a reliable sealing structure when connecting the wound insulating cylinder 2, thus effectively preventing the intrusion of external moisture or pollutants. On the outer wall, there is an overflow groove 15. The position and shape of the overflow groove 15 are precisely designed. Its function is to provide a discharge path for the two-component sealant 3 during the injection process to prevent excess sealant from accumulating inside the cylinder, resulting in a decline in sealing performance or the retention of air bubbles. The cooperation of the overflow groove 15 and the annular sealing groove 17 can ensure that the sealant is evenly distributed in the locking area during the connection process between the locking electrode and the wound insulating cylinder 2, and automatically adjust the amount of sealant by overflowing from the groove, avoiding excessive sealant from hindering the locking action of the electrode or affecting the sealing effect.

[0031] Please refer to the appendix Figure 6 - appendix Figure 8 As shown in the figure, on the opposite sides of the first locking electrode 5 and the second locking electrode 14, there are injection ports 7 and suction ports 13. Sealing check valves 8 are installed on the inner walls of the injection ports 7 and the suction ports 13 for exhausting the gas inside the cylinder and preventing air from flowing back. The injection port 7 is connected to a vacuum negative pressure device for injecting the two-component sealant 3, and the suction port 13 is used for exhausting the air inside the cylinder.

[0032] Specifically, glue injection ports 7 and suction ports 13 are provided on the opposite sides of the first locking electrode 5 and the second locking electrode 14. Sealing check valves 8 are respectively installed on the inner walls of the glue injection ports 7 and the suction ports 13. The setting of the sealing check valves 8 can effectively control the unidirectional flow of gas, thereby exhausting the gas in the cylinder during the glue injection process and preventing external air from flowing back into the internal space of the wound insulating cylinder 2. The glue injection port 7 is connected to a vacuum negative pressure device through a pipeline. The suction force provided by the vacuum negative pressure device is used to evenly inject the two-component sealant 3 into the internal part of the wound insulating cylinder 2 and fully fill the surrounding space of the core body 4 to ensure that the sealant covers without gaps. The design of the suction port 13 is used to discharge the gas and residual air generated during the glue injection process, and eliminate the possible remaining bubbles in the cylinder through the suction effect, thereby avoiding the influence of air interlayers in the sealant on its sealing performance.

[0033] The positions of the glue injection port 7 and the suction port 13 are arranged to be adapted to the internal structure of the cylinder, ensuring a reasonable flow path of the two-component sealant 3. At the same time, through the coordinated action at both ends, the functions of efficient glue injection and gas discharge are realized, so that the sealant in the entire wound insulating cylinder 2 is evenly distributed, further improving the sealing effect and the stability of the equipment operation.

[0034] Please refer to the attached Figure 1 , an insulating component 12 is installed between the core body 4 and the wound insulating cylinder 2, which is used to enhance the electrical insulation performance of the lightning arrester and avoid the breakdown risk under internal high-voltage conditions.

[0035] Specifically, an insulating component 12 is installed between the core body 4 and the wound insulating cylinder 2. The insulating component 12 is made of a high-strength and high-voltage-resistant insulating material, and its shape and size are closely matched with the inner wall of the core body 4 and the wound insulating cylinder 2, and a stable fixing effect is achieved through a reasonable assembly method. The setting of the insulating component 12 can form a protective layer with excellent electrical insulation performance between the core body 4 and the wound insulating cylinder 2, significantly improving the insulation ability of the lightning arrester under high-voltage operating conditions, thereby effectively preventing the electrical breakdown phenomenon that may occur under high electric field strength. The insulating component 12 can not only withstand the long-term high-voltage action, but also adapt to the temperature changes and mechanical stresses during the operation of the lightning arrester, and maintain stable insulation characteristics.

[0036] Please refer to the attached Figure 9 , the gap two-component glue filling and sealing method includes the following steps: Position the core body 4 through the first sealed positioning electrode 11 and the second sealed positioning electrode 10, apply sealant and then seal it using a heat shrinkage process; Connect the first locking electrode 5 and the second locking electrode 14 to the wound insulating cylinder 2 respectively, and apply an axial pressure to the core body 4 through the preloading spring 9; Inject the two-component sealant 3 through the glue injection port 7 under vacuum negative pressure, exhaust the air in the cylinder and fill it evenly; Use a sealing nut 6 to block the glue injection port 7 and the suction port 13; Apply vulcanization aids to the wound insulating cylinder 2 and the silicone umbrella-shaped outer sheath 1, and form an integrated sealing structure through high-temperature vulcanization.

[0037] Specifically, install the core body 4 between the first sealed positioning electrode 11 and the second sealed positioning electrode 10. The first sealed positioning electrode 11 and the second sealed positioning electrode 10 are evenly coated with sealant through the designed V-shaped sealing groove 16. After installation, perform a heat shrinkage process. Utilize the heat shrinkage effect to make the sealant closely fit the surface of the core body 4 and the positioning electrode, forming a preliminary airtight seal to ensure a firm and gapless connection between the core body 4 and the positioning electrode.

[0038] Then connect the first locking electrode 5 and the second locking electrode 14 to both ends of the wound insulating cylinder 2 respectively. The locking electrodes are tightened through the trapezoidal thread 18 to form a stable mechanical connection with the outer wall of the insulating cylinder. The preloading spring 9 is installed between the second sealed positioning electrode 10 and the core body 4, and the core body 4 is fixed through the axial pressure action, enabling it to maintain a stable stress state during long-term operation and preventing structural loosening caused by vibration or thermal expansion.

[0039] After completion of the installation, connect the wound insulating cylinder 2 to a vacuum negative pressure device through the glue injection port 7. After starting the vacuum device, inject two-component sealant 3 into the interior of the wound insulating cylinder 2 through the glue injection port 7. At the same time, utilize the exhaust function of the suction port 13 to discharge the residual gas and possible bubbles in the cylinder until the two-component sealant 3 is evenly distributed in the wound insulating cylinder 2 and completely covers the outer surface of the core body 4.

[0040] After completion of the glue injection process, use the sealing nut 6 to block the glue injection port 7 and the suction port 13 respectively. The sealing nut 6 cooperates with the annular sealing groove 17 on the locking electrode to form a tight sealing structure, further preventing external moisture or contaminants from entering the interior of the wound insulating cylinder 2 through the glue injection port 7 or the suction port 13.

[0041] Evenly coat vulcanization aids on the outer surface of the wound insulating cylinder 2 and the inner surface of the silicone umbrella-shaped outer sheath 1. The vulcanization aids can enhance the bonding force between the silicone umbrella-shaped outer sheath 1 and the wound insulating cylinder 2. After coating, cover the silicone umbrella-shaped outer sheath 1 on the outside of the wound insulating cylinder 2, and form an integrated sealing structure for the two through the high-temperature vulcanization process.

[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lightning arrester, comprising a core body (4), a wound insulating cylinder (2), a first locking electrode (5), a second locking electrode (14), a silicone rubber umbrella-shaped outer sheath (1), a first sealed positioning electrode (11), and a second sealed positioning electrode (10), characterized in that: The core body (4) is positioned by the first sealed positioning electrode (11) and the second sealed positioning electrode (10). The first sealed positioning electrode (11) and the second sealed positioning electrode (10) are provided with V-shaped sealing grooves (16). After applying sealant, they are hermetically connected to the core body (4) through a heat-shrinkage process. The wound insulating cylinder (2) is used to wrap the core body (4), and its interior is filled with a two-component sealant (3). Both ends are hermetically connected through the first locking electrode (5) and the second locking electrode (14). Trapezoidal threads (18) are provided on the outer walls of the first locking electrode (5) and the second locking electrode (14), and their surfaces are coated with a sealing electrical grease. The silicone umbrella-shaped outer sleeve (1) is integrally connected to the wound insulating cylinder (2) after vulcanization to form an external sealing protection.

2. The lightning arrester according to claim 1, characterized in that, An annular sealing groove (17) is provided on one side of the first locking electrode (5) and the second locking electrode (14), and an overflow groove (15) is provided on the outer wall for hermetically connecting the wound insulating cylinder (2) and discharging excess sealant.

3. An arrester according to claim 1, characterized in that, On the opposite sides of the first locking electrode (5) and the second locking electrode (14), a glue injection port (7) and a suction port (13) are provided. Sealing check valves (8) are installed on the inner walls of the glue injection port (7) and the suction port (13) to exhaust the gas in the cylinder and prevent air from flowing back.

4. An arrester according to claim 1, characterized in that, An insulating member (12) is installed between the core body (4) and the wound insulating cylinder (2) to enhance the electrical insulation performance of the lightning arrester and avoid the breakdown risk under internal high-voltage conditions.

5. An arrester according to claim 1, characterized in that, A preloading spring (9) is provided between the second sealed positioning electrode (10) and the first locking electrode (5) to apply an axial pressure to the core body (4) to prevent structural loosening caused by long-term operation.

6. An arrester according to claim 1, characterized in that, The silicone umbrella-shaped outer sleeve (1) is made of a weather-resistant silicone material, has the properties of moisture-proof, ultraviolet-proof and anti-mechanical impact, and is integrally connected to the wound insulating cylinder (2) through high-temperature vulcanization.

7. An arrester according to claim 2, characterized in that, The overflow groove (15) is provided on the outer walls of the first locking electrode (5) and the second locking electrode (14) to facilitate the discharge of excess sealant.

8. The lightning arrester according to claim 3, characterized in that The glue injection port (7) is connected to a vacuum negative pressure device for injecting the two-component sealant (3), and the suction port (13) is used to exhaust the air in the cylinder.

9. An arrester according to claim 1, characterized in that, The surface of the wound insulating cylinder (2) is evenly coated with a vulcanization aid to enhance its adhesion performance to the silicone umbrella-shaped outer sleeve (1).

10. Gap two-component glue filling and sealing method, for a lightning arrester according to any one of claims 1-9, characterized in that, It includes the following steps: Position the core body (4) through the first sealed positioning electrode (11) and the second sealed positioning electrode (10), apply sealant, and then seal it through a heat-shrinkage process. Connect the first locking electrode (5) and the second locking electrode (14) to the wound insulating cylinder (2) respectively, and apply an axial pressure to the core body (4) through the preloading spring (9). Inject the two-component sealant (3) under the action of vacuum negative pressure through the glue injection port (7), exhaust the air in the cylinder and fill it evenly. Use a sealing nut (6) to block the glue injection port (7) and the suction port (13). Apply a vulcanization aid to the wound insulating cylinder (2) and the silicone umbrella-shaped outer sleeve (1), and form an integrated sealing structure through high-temperature vulcanization.

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