A new sealing connecting device of an ultra-high voltage composite insulator

Abstract

This application discloses a novel sealing connection device for ultra-high voltage composite insulators, comprising a metal sleeve, an insulating sleeve, a connecting assembly, and a core. A sealing element is disposed at the middle of the upper end face of the metal sleeve; a groove-shaped structure corresponding to the sealing element is formed on the lower end face of the insulating sleeve; the upper end of the metal sleeve and the lower end of the insulating sleeve are connected by the connecting assembly; the core passes through the metal sleeve and the insulating sleeve; wherein, a secondary sealing assembly is disposed on the outer surface of the connecting assembly at the connection point between the metal sleeve and the insulating sleeve. The key technical point is that this novel sealing connection device for ultra-high voltage composite insulators has a secondary sealing assembly disposed on the outer side of the connecting assembly, and a sealing element structure disposed on the inner side of the secondary sealing assembly. Furthermore, during use, the connecting assembly itself, as well as the metal sleeve and the insulating sleeve, are tightly fitted together, effectively forming a sealing structure. This creates a multi-layered sealing structure with excellent sealing performance, making it suitable for various environments and showing promising application prospects.

Description

Technical Field

[0001] This invention belongs to the field of electric power, specifically a novel sealing connection device for ultra-high voltage composite insulators. Background Technology

[0002] Electricity is an energy source that uses electrical energy as power. Discovered in the 1870s, the discovery and application of electricity sparked the Second Industrial Revolution. It became one of the three technological revolutions that have occurred in the world since the 18th century, and since then, technology has changed people's lives.

[0003] The large-scale power system that emerged in the 20th century is one of the most important achievements in the history of human engineering science. It is a power production and consumption system composed of power generation, transmission, transformation, distribution and consumption.

[0004] It converts primary energy from nature into electricity through mechanical energy devices, and then supplies the electricity to various users through transmission, transformation and distribution.

[0005] With the development of the power industry, ultra-high voltage and extra-high voltage transmission lines have increasingly higher requirements for the anti-pollution flashover capability and end sealing performance of composite insulators.

[0006] The end sealing structures of composite insulators are mainly divided into integral sealing structures and combined sealing structures. Practice has shown that the former is simpler in process, more suitable for assembly line operation, has fewer control points, and is more reliable than the latter. Most composite insulators adopt integral sealing structures. However, with the increase in the voltage level of transmission lines, the existing end sealing structures cannot well meet the higher mechanical and electrical performance requirements of ultra-high voltage and extra-high voltage composite insulators.

[0007] Research has revealed certain drawbacks in the use of novel sealing connection devices for existing ultra-high voltage composite insulators.

[0008] In the operation of existing composite insulators, the end seals of the composite insulators directly affect the safety of their internal insulation performance. If the end seals of the insulators fail, external moisture and dirt will penetrate into the interface between the sheath and the core rod and corrode the core rod, thereby posing a risk of breakdown along the interface between the sheath and the core rod, and may also lead to corrosion and brittle fracture of the core rod, threatening the safety of power grid operation.

[0009] Existing systems use a combined sealing structure for ease of installation. However, the sealing effect of existing combined sealing structures is not good, especially at the joints. These joints are exposed to the external environment for a long time. After a period of thermal expansion and contraction, the joints will deform and the core rod is prone to corrosion and brittle fracture, which does not meet people's requirements. Therefore, we propose a new sealing connection device for ultra-high voltage composite insulators. Summary of the Invention

[0010] To overcome the shortcomings of the prior art, this application provides a novel sealing connection device for ultra-high voltage composite insulators, which describes a multi-seal structure. In use, a secondary sealing component is provided on the outside of the connecting component, and a sealing structure is provided on the inside of the secondary sealing component. Moreover, in use, the connecting component itself, as well as the metal sleeve and the insulating sleeve, are tightly fitted together, which is equivalent to forming a sealing structure. This forms a multi-seal structure with good sealing performance, is suitable for various environments, and has good application prospects.

[0011] The technical solution adopted by this application to solve its technical problem is:

[0012] A novel sealing connection device for ultra-high voltage composite insulators includes a metal sleeve, an insulating sleeve, a connecting assembly, and a core.

[0013] A seal is provided at the middle position of the upper end face of the metal sleeve;

[0014] The lower end face of the insulating sleeve has a groove-shaped structure corresponding to the sealing element;

[0015] The upper end of the metal sleeve and the lower end of the insulating sleeve are connected by a connecting assembly;

[0016] The core passes through the metal sleeve and the insulating sleeve;

[0017] The outer surface of the connecting component is provided with a secondary sealing component on the outside of the connection between the metal sleeve and the insulating sleeve.

[0018] The metal sleeve and the insulating sleeve are bonded together to form a seal.

[0019] At this point, the seal is inserted into the corresponding groove structure to form a seal.

[0020] The connecting assembly forms a seal on the outside of the metal sleeve and the insulating sleeve.

[0021] The secondary sealing assembly forms a seal on the outside of the connecting assembly.

[0022] This invention describes a novel sealing connection device for ultra-high voltage composite insulators, which features a multi-seal structure. In use, a secondary sealing component is provided on the outer side of the connecting assembly, and a sealing structure is provided on the inner side of the secondary sealing component. Furthermore, the tight fit between the connecting assembly itself, the metal sleeve, and the insulating sleeve also constitutes a sealing structure. This multi-seal structure provides excellent sealing performance, is suitable for various environments, and has promising application prospects.

[0023] Preferably, the sealing element includes a sealing sleeve integrally formed with the upper end face of the metal sleeve, and the groove structure includes a connecting groove formed on the inner surface of the insulating sleeve, wherein the sealing sleeve is inserted into the connecting groove.

[0024] The connecting groove communicates with the insulating sleeve, and the sealing sleeve is in direct contact with the core, which is the innermost sealing structure of the device.

[0025] Preferably, the sealing element further includes an annular sealing strip fixedly installed on the upper end face of the metal sleeve. The annular sealing strip is disposed on the outside of the sealing sleeve, and an annular groove is formed on the lower end face of the insulating sleeve corresponding to the position of the annular sealing strip. The annular groove is inserted into the annular sealing strip.

[0026] The annular sealing strip is located in the middle of the upper end face of the metal sleeve. The annular sealing strip is inserted into the annular groove. The annular sealing strip creates a new sealing structure between the metal sleeve and the insulating sleeve, resulting in a good sealing effect when the metal sleeve and the insulating sleeve are in contact.

[0027] Preferably, the connecting component includes a first connecting ring and a second connecting ring:

[0028] The first connecting ring is fixedly installed on the outer surface of the metal sleeve;

[0029] The second connecting ring is fixedly installed on the outer surface of the insulating sleeve;

[0030] The number of connectors is several sets, and the first connecting ring is connected and limited to the second connecting ring through several sets of connectors.

[0031] During use, the first connecting ring and the second connecting ring are opposite each other, and the first connecting ring and the second connecting ring are limited by the plug-in connector, so that the metal sleeve and the insulating sleeve will not separate.

[0032] Preferably, the connector includes a snap-fit ​​groove and a snap-fit ​​block. The number of snap-fit ​​grooves and snap-fit ​​blocks is several sets. The snap-fit ​​grooves and snap-fit ​​blocks are arranged in a circular array. The snap-fit ​​groove is opened on the upper end face of the first connecting ring. The snap-fit ​​block is fixedly installed on the lower end face of the second connecting ring. The snap-fit ​​groove is inserted into the snap-fit ​​block.

[0033] The slot and plug are connected by a plug-in method, which can be directly plugged in and unplugged during use without rotation or other tools, making it very convenient to use.

[0034] Preferably, the outer surface of the first connecting ring is provided with a plurality of limiting components, and the limiting components are engaged with the second connecting ring.

[0035] The first and second connecting rings are fixed together by a limiting component, which improves stability and prevents them from loosening.

[0036] Preferably, the limiting component includes a through hole, a limiting groove, a tension block, and a spring.

[0037] Through holes are formed on the outer surface of the connector block;

[0038] The limiting groove is formed in the first connecting ring;

[0039] Limiting rings are fixedly installed on the outer surface of the stretching block;

[0040] The two ends of the spring are connected to the limiting ring and the through hole, respectively;

[0041] The stretching block passes through the middle of the limiting groove and is inserted into the through hole.

[0042] In use, the tension block passes through the middle of the limiting groove and is inserted into the through hole, thereby limiting the insertion block.

[0043] The spring serves to limit the position of the limiting ring, ensuring that the tension block is always inserted into the through hole.

[0044] The stretching block is tilted at one end within the limiting groove.

[0045] During the insertion process, the plug-in block contacts the inclined end face of the tension block, thereby squeezing the tension block and causing it to move outward, so that the plug-in block can be fully inserted. After insertion, under the tension of the spring, the tension block is inserted into the through hole.

[0046] This invention discloses a novel sealing connection device for ultra-high voltage composite insulators. The device includes a connection component in which the snap-fit ​​groove and the plug-in block are connected by a plug-in method. During installation, the components can be directly inserted. During disassembly, the second connecting ring is pulled outward to separate the first and second connecting rings. The device is easy to install and disassemble, convenient to use, reusable, and has good performance and promising application prospects.

[0047] Preferably, the secondary sealing assembly includes a first sealing cap and a second sealing bag. The first sealing cap is fixedly installed on the upper end face of the metal sleeve, and the second sealing bag is fixedly installed on the lower end face of the insulating sleeve. The insulating sleeve is in contact with the metal sleeve.

[0048] When the first connecting ring and the second connecting ring are attached, the first sealing cap and the second sealing bag close together to form a whole, forming a protective structure on the outside of the first connecting ring and the second connecting ring.

[0049] Preferably, both the first sealing cap and the second sealing bag are annular in shape, and the first sealing cap or the second sealing bag has an injection port.

[0050] During use, glue is injected into the first and second connecting rings through the glue injection port, which forms a ring-shaped glue strip structure between the first and second connecting rings, thereby preventing external water from entering between the metal sleeve and the insulating sleeve.

[0051] Preferably, a heat insulation layer is fixedly installed on the inner surface of both the metal sleeve and the insulating sleeve, and an annular cavity is opened inside the metal sleeve, with an electric heating coil fixedly installed inside the cavity.

[0052] This invention discloses a novel sealing connection device for ultra-high voltage composite insulators, which includes a secondary sealing component and an electric heating coil. During use, adhesive is injected into the secondary sealing component through the injection port to form a ring structure, thereby preventing external water from entering between the first and second connecting rings and improving the sealing effect. During disassembly, the electric heating coil is activated to melt the adhesive. It is convenient to use and has good application prospects.

[0053] In summary, the present invention has at least one of the following beneficial technical effects:

[0054] First, this invention describes a novel sealing connection device for ultra-high voltage composite insulators, which describes a multi-seal structure. In use, a secondary sealing component is provided on the outside of the connecting component, and a sealing component structure is provided on the inside of the secondary sealing component. Moreover, in use, the connecting component itself, as well as the metal sleeve and the insulating sleeve, are tightly fitted together, which is equivalent to forming a sealing structure. This forms a multi-seal structure with good sealing performance, is suitable for various environments, and has good application prospects.

[0055] Secondly, this invention describes a novel sealing connection device for ultra-high voltage composite insulators. It describes a connection component in which the snap-fit ​​groove and the plug-in block are connected by plugging in. During installation, they can be directly inserted. During disassembly, the second connecting ring is pulled outward to separate the first and second connecting rings directly. It is easy to assemble and disassemble, easy to use, reusable, and has good performance and good application prospects.

[0056] Thirdly, this invention describes a novel sealing connection device for ultra-high voltage composite insulators, which includes a secondary sealing component and an electric heating coil. During use, adhesive is injected into the secondary sealing component through the injection port to form a ring structure, thereby preventing external water from entering between the first and second connecting rings and improving the sealing effect. When disassembling, the electric heating coil is activated to melt the adhesive. It is convenient to use and has good application prospects. Attached Figure Description

[0057] Figure 1 This is an overall structural block diagram of the present invention;

[0058] Figure 2 This is a partial structural diagram of the present invention;

[0059] Figure 3 This is a structural diagram of the metal sleeve in this invention;

[0060] Figure 4 This is a partial structural diagram of the insulating sleeve in this invention;

[0061] Figure 5 This is a partial cross-sectional view of the internal structure of the metal sleeve in this invention;

[0062] Figure 6 This is a structural diagram of the first connecting ring in this invention;

[0063] Figure 7 This is a partial structural diagram of the first connecting ring in this invention.

[0064] Reference numerals: 1. Metal sleeve; 2. Insulating sleeve; 3. Core; 4. Sealing sleeve; 5. Connecting groove; 6. Annular sealing strip; 7. First connecting ring; 8. Second connecting ring; 9. Snap-fit ​​groove; 10. Insertion block; 11. Limiting groove; 12. Tensioning block; 13. Limiting ring; 14. Spring; 15. First sealing cover; 16. Second sealing bag; 17. Glue injection port; 18. Heat insulation layer; 19. Electric heating coil. Detailed Implementation

[0065] This application provides a novel sealing connection device for ultra-high voltage composite insulators, solving the problem that in existing technologies, the end seal of the composite insulator directly affects the safety of its internal insulation performance during operation. If the end seal fails, external moisture and dirt can penetrate the interface between the sheath and the core rod and corrode the core rod, leading to the risk of breakdown along the interface and potentially causing corrosion and brittle fracture of the core rod, threatening the safety of power grid operation. Existing technologies use a combined sealing structure for ease of installation, but this structure has poor sealing performance, especially at the connection points. These connections are exposed to the external environment for extended periods, and after thermal expansion and contraction, deformation can occur at the connection points, making the core rod prone to corrosion and brittle fracture.

[0066] This invention describes a novel sealing connection device for ultra-high voltage composite insulators, which features a multi-seal structure. In use, a secondary sealing component is provided on the outer side of the connecting component, and a sealing structure is provided on the inner side of the secondary sealing component. Furthermore, the tight fit between the connecting component itself, the metal sleeve, and the insulating sleeve also constitutes a sealing structure, thus forming a multi-seal structure with excellent sealing performance. It is suitable for various environments and has good application prospects.

[0067] The novel sealing connection device for ultra-high voltage composite insulators describes the connection components. When in use, the snap-fit ​​groove and the plug-in block are connected by plugging. During installation, they can be directly inserted. When disassembling, the second connecting ring is pulled outward to separate the first and second connecting rings. It is easy to assemble and disassemble, easy to use, reusable, has good performance, and has good application prospects.

[0068] The novel sealing connection device for ultra-high voltage composite insulators describes a secondary sealing component and an electric heating coil. During use, adhesive is injected into the secondary sealing component through the injection port to form a ring structure, thereby preventing external water from entering between the first and second connecting rings and improving the sealing effect. When disassembling, the electric heating coil is activated to melt the adhesive. It is convenient to use and has good application prospects.

[0069] Example 1:

[0070] A novel sealing connection device for ultra-high voltage composite insulators, such as Figures 1-7 As shown, it includes a metal sleeve 1, an insulating sleeve 2, a connecting assembly, and a core 3:

[0071] A sealing element is provided at the middle position of the upper end face of the metal sleeve 1;

[0072] The lower end face of the insulating sleeve 2 is provided with a groove-shaped structure corresponding to the sealing element;

[0073] The upper end of the metal sleeve 1 and the lower end of the insulating sleeve 2 are connected by a connecting assembly;

[0074] Core 3 passes through metal sleeve 1 and insulating sleeve 2;

[0075] A secondary sealing component is provided on the outer surface of the connecting assembly at the connection between the metal sleeve 1 and the insulating sleeve 2.

[0076] The metal sleeve 1 and the insulating sleeve 2 are fitted together to form a seal.

[0077] At this point, the seal is inserted into the corresponding groove structure to form a seal.

[0078] The connecting assembly forms a seal on the outside of the metal sleeve 1 and the insulating sleeve 2.

[0079] The secondary sealing assembly forms a seal on the outside of the connecting assembly.

[0080] This invention describes a novel sealing connection device for ultra-high voltage composite insulators, which features a multi-seal structure. In use, a secondary sealing component is provided on the outer side of the connecting assembly, and a sealing structure is provided on the inner side of the secondary sealing component. Furthermore, the tight fit between the connecting assembly itself, the metal sleeve 1, and the insulating sleeve 2 also constitutes a sealing structure, forming a multi-seal structure with excellent sealing performance. It is suitable for various environments and has good application prospects.

[0081] Example 2:

[0082] Based on Example 1, such as Figures 1-7 As shown, this embodiment illustrates the specific structure of the connecting component;

[0083] The sealing element includes a sealing sleeve 4 integrally formed with the upper end face of the metal sleeve 1, and the groove structure includes a connecting groove 5 formed on the inner surface of the insulating sleeve 2, and the sealing sleeve 4 is inserted into the connecting groove 5.

[0084] The connecting groove 5 communicates with the insulating sleeve 2, and the sealing sleeve 4 is in direct contact with the core 3, which is the innermost sealing structure.

[0085] The sealing element also includes an annular sealing strip 6 fixedly installed on the upper end face of the metal sleeve 1. The annular sealing strip 6 is located on the outside of the sealing sleeve 4. An annular groove is opened on the lower end face of the insulating sleeve 2 corresponding to the position of the annular sealing strip 6. The annular groove is inserted into the annular sealing strip 6.

[0086] The annular sealing strip 6 is located in the middle of the upper end face of the metal sleeve 1. It is inserted into the annular groove, which makes the metal sleeve 1 and the insulating sleeve 2 form a new sealing structure, resulting in a good sealing effect when the metal sleeve 1 and the insulating sleeve 2 are in contact.

[0087] The connecting assembly includes a first connecting ring 7 and a second connecting ring 8:

[0088] The first connecting ring 7 is fixedly installed on the outer surface of the metal sleeve 1;

[0089] The second connecting ring 8 is fixedly installed on the outer surface of the insulating sleeve 2;

[0090] The number of connectors is several sets, and the first connecting ring 7 is connected to the second connecting ring 8 through the connectors.

[0091] When in use, the first connecting ring 7 and the second connecting ring 8 are opposite each other, and the first connecting ring 7 and the second connecting ring 8 are limited by the plug-in connector, so that the metal sleeve 1 and the insulating sleeve 2 will not separate.

[0092] The connector includes a snap-fit ​​groove 9 and a snap-fit ​​block 10. There are several sets of snap-fit ​​grooves 9 and snap-fit ​​blocks 10. The snap-fit ​​grooves 9 and snap-fit ​​blocks 10 are arranged in a ring array. The snap-fit ​​grooves 9 are opened on the upper end face of the first connecting ring 7. The snap-fit ​​blocks 10 are fixedly installed on the lower end face of the second connecting ring 8. The snap-fit ​​grooves 9 and the snap-fit ​​blocks 10 are inserted into each other.

[0093] The slot 9 and the plug block 10 are connected by a plug-in method. They can be directly plugged in and unplugged during use without rotation or the use of other tools, making them convenient to use.

[0094] The outer surface of the first connecting ring 7 is provided with several sets of limiting components, which are engaged with the second connecting ring 8.

[0095] The first connecting ring 7 and the second connecting ring 8 are fixed together by a limiting component, which can improve stability.

[0096] The limiting assembly includes a through hole, a limiting groove 11, a tension block 12, and a spring 14.

[0097] Through holes are formed on the outer surface of the plug-in block 10;

[0098] The limiting groove 11 is formed in the first connecting ring 7;

[0099] A limit ring 13 is fixedly installed on the outer surface of the tension block 12;

[0100] The two ends of the spring 14 are connected to the limiting ring 13 and the through hole, respectively;

[0101] The stretching block 12 passes through the middle of the limiting groove 11 and is inserted into the through hole.

[0102] In use, the stretching block 12 passes through the middle position of the limiting groove 11 and is inserted into the through hole, thereby limiting the insertion block 10.

[0103] The spring 14 limits the position of the limiting ring 13, so that the tension block 12 is always inserted into the through hole.

[0104] The stretching block 12 is inclined at one end in the limiting groove 11.

[0105] During the insertion process of the plug block 10, the plug block 10 contacts the inclined end face of the tension block 12, thereby squeezing the tension block 12 and causing the tension block 12 to move outward, so that the plug block 10 can be fully inserted. After insertion, under the tension of the spring 14, the tension block 12 is inserted into the through hole.

[0106] This invention discloses a novel sealing connection device for ultra-high voltage composite insulators. The device includes a connection component in which the snap-fit ​​groove 9 and the plug block 10 are connected by a plug-in connection. During installation, the plug can be inserted directly. During disassembly, the second connecting ring 8 is pulled outward to separate the first connecting ring 7 and the second connecting ring 8. The device is easy to install and disassemble, easy to use, reusable, and has good performance and promising application prospects.

[0107] Example 3:

[0108] Based on Example 2, such as Figures 1-7 As shown, this embodiment illustrates other structures of the secondary sealing assembly;

[0109] The secondary sealing assembly includes a first sealing cap 15 and a second sealing bag 16. The first sealing cap 15 is fixedly installed on the upper end face of the metal sleeve 1, and the second sealing bag 16 is fixedly installed on the lower end face of the insulating sleeve 2. The insulating sleeve 2 is in contact with the metal sleeve 1.

[0110] When the first connecting ring 7 and the second connecting ring 8 are attached, the first sealing cap 15 and the second sealing bag 16 close to form a whole, forming a protective structure on the outside of the first connecting ring 7 and the second connecting ring 8, thus achieving a better protective effect.

[0111] The first sealing cap 15 and the second sealing bag 16 are both annular in shape, and an injection port 17 is provided on the first sealing cap 15 or the second sealing bag 16.

[0112] During use, glue is injected into the first connecting ring 7 and the second connecting ring 8 through the glue injection port 17, which can form an annular glue strip structure between the first connecting ring 7 and the second connecting ring 8, thereby preventing external water from entering between the metal sleeve 1 and the insulating sleeve 2.

[0113] The inner surfaces of both the metal sleeve 1 and the insulating sleeve 2 are fixedly fitted with heat insulation layers 18. The metal sleeve 1 has an annular cavity inside, and an electric heating coil 19 is fixedly installed inside the cavity.

[0114] This invention discloses a novel sealing connection device for ultra-high voltage composite insulators, which includes a secondary sealing component and an electric heating ring 19. During use, adhesive is injected into the secondary sealing component through the adhesive injection port 17 to form a ring structure, thereby preventing external water from entering between the first connecting ring 7 and the second connecting ring 8, thus improving the sealing effect. During disassembly, the electric heating ring 19 is activated, and the adhesive is melted by heating. It is convenient to use and has good application prospects.

[0115] It should be noted that, in use, the novel sealing connection device for ultra-high voltage composite insulators of the present invention involves aligning the first connecting ring 7 on the metal sleeve 1 with the second connecting ring 8, and moving the first connecting ring 7 so that the plug block 10 on the second connecting ring 8 is inserted into the snap-fit ​​groove on the first connecting ring 7.

[0116] During the insertion process of the plug block 10, the plug block 10 contacts the inclined end face of the tension block 12, thereby squeezing the tension block 12 and causing the tension block 12 to move outward, so that the plug block 10 can be fully inserted. After insertion, under the tension of the spring 14, the tension block 12 is inserted into the through hole, thereby fixing the position of the first connecting ring 7 and the second connecting ring 8.

[0117] When the first connecting ring 7 and the second connecting ring 8 are fixed in position, the upper end face of the metal sleeve 1 is in contact with the lower end face of the insulating sleeve 2, and then the sealing sleeve 4 is inserted into the connecting groove 5, and the annular sealing strip 6 is inserted into the annular groove to form a multiple seal.

[0118] Glue is injected into the first sealing cap 15 and the second sealing bag 16 through the glue injection port 17. After the glue is injected, an annular rubber strip is formed, which covers the connection between the first connecting ring 7 and the second connecting ring 8 to prevent external water from entering. Moreover, the first sealing cap 15 and the second sealing bag 16 protect the rubber strip, thereby effectively extending the service life of the rubber strip and achieving good performance.

[0119] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A novel sealing connection device for ultra-high voltage composite insulators, characterized in that, include: A metal sleeve (1) has a sealing element at the middle position of its upper end face; The insulating sleeve (2) has a groove-shaped structure on its lower end face that corresponds to the sealing element; The upper end of the metal sleeve (1) and the lower end of the insulating sleeve (2) are connected by the connecting assembly; The core (3) passes through the metal sleeve (1) and the insulating sleeve (2); Wherein, a secondary sealing component is provided on the outer surface of the connecting component at the connection between the metal sleeve (1) and the insulating sleeve (2); The sealing element includes a sealing sleeve (4) integrally formed with the upper end face of the metal sleeve (1), and the groove structure includes a connecting groove (5) formed on the inner surface of the insulating sleeve (2), and the sealing sleeve (4) is inserted into the connecting groove (5). The sealing element also includes an annular sealing strip (6) fixedly installed on the upper end face of the metal sleeve (1). The annular sealing strip (6) is located on the outside of the sealing sleeve (4). The lower end face of the insulating sleeve (2) is provided with an annular groove corresponding to the position of the annular sealing strip (6). The annular groove is inserted into the annular sealing strip (6). The connection component includes: The first connecting ring (7) is fixedly installed on the outer surface of the metal sleeve (1); The second connecting ring (8) is fixedly installed on the outer surface of the insulating sleeve (2); The number of plug-in components is several, and the first connecting ring (7) is connected to the second connecting ring (8) through the plug-in components; The connector includes a snap-fit ​​groove (9) and a snap-fit ​​block (10). The number of snap-fit ​​grooves (9) and snap-fit ​​blocks (10) are several sets. The snap-fit ​​grooves (9) and snap-fit ​​blocks (10) are arranged in a ring array. The snap-fit ​​groove (9) is opened on the upper end face of the first connecting ring (7). The snap-fit ​​block (10) is fixedly installed on the lower end face of the second connecting ring (8). The snap-fit ​​groove (9) and the snap-fit ​​block (10) are inserted into each other. The outer surface of the first connecting ring (7) is provided with a plurality of limiting components, which are engaged with the second connecting ring (8); The limiting component includes: Through holes are formed on the outer surface of the plug block (10); A limiting groove (11) is formed in the first connecting ring (7); A tension block (12) has a limit ring (13) fixedly installed on its outer surface; Spring (14), whose two ends are connected to the limiting ring (13) and the through hole respectively; The stretching block (12) passes through the middle position of the limiting groove (11) and is inserted into the through hole.

2. The novel sealing connection device for ultra-high voltage composite insulators as described in claim 1, characterized in that: The secondary sealing assembly includes a first sealing cap (15) and a second sealing bag (16). The first sealing cap (15) is fixedly installed on the upper end face of the metal sleeve (1), and the second sealing bag (16) is fixedly installed on the lower end face of the insulating sleeve (2). The insulating sleeve (2) is in contact with the metal sleeve (1).

3. A novel sealing connection device for ultra-high voltage composite insulators as described in claim 2, characterized in that: The first sealing cap (15) and the second sealing bag (16) are both annular in shape, and the first sealing cap (15) or the second sealing bag (16) is provided with an injection port (17).

4. A novel sealing connection device for ultra-high voltage composite insulators as described in claim 3, characterized in that: The inner surfaces of the metal sleeve (1) and the insulating sleeve (2) are both fixedly equipped with heat insulation layer (18). The metal sleeve (1) has an annular cavity inside, and an electric heating coil (19) is fixedly installed inside the cavity.

Images