High-voltage, extra-high-voltage dry-type insulation outdoor terminal

Abstract

The utility model discloses a high pressure, extra -high voltage dry type insulation outdoor terminal, including the body, the body includes the epoxy sleeve (2) for with the fixed connection of cable (1) end -to -end conductor, the insertion end sealed fixed connection of epoxy sleeve (2) has the connecting base (3), the outer sleeve of epoxy sleeve (2) outer layer is sleeved with the sleeve pipe (4), the insertion end of sleeve pipe (4) is also sealed fixed connection in the connecting seat bottom, and the epoxy sleeve (2) with sleeve pipe (4) between being equipped with insulation filler (5). The utility model provides a kind of modularization structure, the dry type insulation structure of combined form, to reduce the difficulty of outdoor terminal production, the high pressure, extra -high voltage dry type insulation outdoor terminal of production cost.

Description

Technical Field

[0001] This utility model relates to the field of cable connection equipment, specifically high voltage and ultra-high voltage dry-type insulated outdoor terminals. Background Technology

[0002] Currently, with available technology, the insulation of dry-type outdoor terminals is mostly made of one-piece molding, either epoxy resin + silicone or silicone rubber. However, when connecting high-voltage and ultra-high-voltage cables, the outdoor terminals need to reduce the electric field strength, resulting in a larger structure. In this case, the one-piece molded outdoor terminals have higher quality and larger volume. The mold cost for the large-volume structure is higher, the injection molding process quality requirements are higher, and the production difficulty is greater, resulting in higher production costs for large-volume outdoor terminals. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a high-voltage and ultra-high-voltage dry-insulated outdoor terminal with a modular and combined dry insulation structure, thereby reducing the difficulty and cost of outdoor terminal production.

[0004] The technical solution adopted by this utility model to solve the above problems is as follows: a high-voltage and ultra-high-voltage dry-type insulated outdoor terminal, including a body, the body including an epoxy sleeve for fixed connection with the end conductor of the cable, the insertion end of the epoxy sleeve is sealed and fixedly connected to a connecting base, the outer sleeve of the epoxy sleeve is sleeved with an outer sleeve, the insertion end of the outer sleeve is also sealed and fixedly connected to the bottom of the connecting base, and an insulating filler is provided between the epoxy sleeve and the outer sleeve.

[0005] Compared with existing technologies, the advantages of this utility model are as follows: The insulating functional structure of the main body is decomposed into epoxy sleeve, outer sleeve, and insulating filler. The epoxy sleeve and outer sleeve are then fixedly connected via a connecting base, maintaining their integrity. Insulating filler is then injected between the epoxy sleeve and outer sleeve to ensure the operational effectiveness of the outdoor terminal. During product installation, the epoxy sleeve, outer sleeve, and insulating filler can be pre-installed at the factory. On-site installation simply requires inserting the cable into the epoxy sleeve, significantly reducing on-site installation difficulty and increasing installation stability, thus ensuring operational stability and safety. Furthermore, because the epoxy sleeve and outer sleeve are designed as separate components, the molds for producing them are correspondingly smaller, reducing mold costs and injection molding difficulty, thereby lowering the production cost of the outdoor terminal.

[0006] As an improvement of this utility model, the connecting base is cylindrical, with an epoxy sleeve connecting flange at one end for sealing and fixing connection with the epoxy sleeve, and an outer sleeve connecting flange at the other end for sealing and fixing connection with the outer sleeve. The diameter of the outer sleeve connecting flange is larger than the diameter of the epoxy sleeve connecting flange. Through this improvement, the epoxy sleeve and the outer sleeve can be installed on the connecting base, and the epoxy sleeve and the outer sleeve can be ensured to not interfere with each other during installation, reducing the installation difficulty and ensuring the safety of high-altitude operations.

[0007] As an improvement of this utility model, the connection between the epoxy sleeve and the epoxy sleeve connecting flange and the connection between the outer sleeve and the outer sleeve connecting flange are both fixedly connected by fasteners and are equipped with sealing rings. With this improvement, an insulating filler needs to be injected between the epoxy sleeve and the outer sleeve. The insulating filler can be in either gaseous or solid state. Therefore, it is necessary to ensure the sealing between the epoxy sleeve and the outer sleeve, hence the need for the design of sealing rings.

[0008] As an improvement of this utility model, a bottom connecting sleeve is connected between the outer sleeve and the outer sleeve connecting flange. The bottom connecting sleeve is fitted onto the outer sleeve. The inner layer of the bottom connecting sleeve is provided with a bottom positioning flange. A sealing ring is provided between the bottom positioning flange and the outer sleeve. A sealing ring is also provided between the end of the bottom connecting sleeve away from the outer sleeve and the outer sleeve connecting flange. With this improvement, the outer sleeve is large and difficult to form. By designing the bottom connecting sleeve, the structure of one end of the outer sleeve can be simplified, and this end can be directly formed into a straight cylinder. Then, the bottom connecting sleeve is used in conjunction with the outer sleeve for sealing and fixing installation, thereby reducing the forming difficulty of the outdoor terminal and reducing production costs.

[0009] As an improvement of this utility model, the outer tube is provided with a cap at the end away from the insertion end. The cap is sealed and fixedly connected to the outer tube. A self-sealing valve is provided on both the cap and the connecting base. Through this improvement, the cap ensures the sealing of the outer tube at the cap end, while the self-sealing valve on the cap is used for vacuuming, and the self-sealing valve on the connecting base is used for injecting insulating filler. When the self-sealing valve is not working, it is in a closed state.

[0010] As an improvement of this utility model, a top connecting sleeve is connected between the outer sleeve and the cap. The top connecting sleeve is fitted onto the outer sleeve, and the inner layer of the top connecting sleeve is provided with a top positioning flange. A sealing ring is provided between the top positioning flange and the outer sleeve. A sealing ring is also provided between the end of the top connecting sleeve away from the outer sleeve and the cap. With this improvement, the outer sleeve is large and difficult to form. By designing the top connecting sleeve, the structure of the other end of the outer sleeve can be simplified, and this end can be directly formed into a straight cylinder. Then, the top connecting sleeve is used in conjunction with the outer sleeve for sealing and fixing installation, thereby reducing the forming difficulty of the outdoor terminal and reducing production costs.

[0011] As an improvement of this utility model, the outer layer of the outer tube is fitted with a skirt. Through this improvement, the structure of the skirt is added to the outer tube to increase the creepage distance of the outdoor terminal and reduce the electric field strength.

[0012] As an improvement of this utility model, the inner layer of the epoxy sleeve is provided with a tapered hole, and a stress cone is sleeved on the end conductor of the cable. The tapered hole and the stress cone fit together. The body also includes a stress cone support assembly, which is used to squeeze the stress cone to move towards the small diameter of the tapered hole to fix the cable. Through this improvement, the outdoor terminal can be fixedly connected to the cable.

[0013] As an improvement of this utility model, the stress cone support assembly includes a stress cone support, a spring, and a connecting ring. The outer ring of the connecting ring is fixedly connected to the bottom of the connection by fasteners, and the inner ring of the connecting ring is axially elastically connected to the stress cone support by the spring. Through this improvement, the spring is used to realize the compression of the stress cone by the stress cone support assembly, thereby ensuring that the stress cone is reduced in diameter along the tapered hole, and realizing the compression and fixed connection of the cable.

[0014] As an improvement of this utility model, the stress cone is provided with an abutting conical surface on the side near the stress cone support, and the stress cone support is provided with a conical sleeve that abuts against the abutting conical surface on the side near the stress cone. The conical sleeve fits into the abutting conical surface. Through this improvement, the contact area between the stress cone support and the stress cone is guaranteed, thereby ensuring the effectiveness of the stress cone support in compressing the stress cone. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall internal structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the connection structure of the connecting base of this utility model.

[0017] Figure 3 This is a schematic diagram of the connection structure between the connecting base and the epoxy sleeve of this utility model.

[0018] Figure 4 This is a schematic diagram of the connection structure between the connecting base and the outer sleeve of this utility model.

[0019] Figure 5 This is a schematic diagram of the connection structure between the cap and the outer sleeve of this utility model.

[0020] Figure 6 This is a schematic diagram of the self-sealing valve connection structure on the connecting base of this utility model.

[0021] Figure 7 This is a schematic diagram of the connection structure between the stress cone and the stress cone support of this utility model.

[0022] The figure shows: 1. Cable, 2. Epoxy sleeve, 2.1. Tapered hole, 3. Connecting base, 3.1. Epoxy sleeve connecting flange, 3.2. Outer sleeve connecting flange, 4. Outer sleeve, 5. Insulating filler, 6. Sealing ring, 7. Bottom connecting sleeve, 7.1. Bottom positioning flange, 8. Cover, 9. Self-sealing valve, 10. Top connecting sleeve, 10.1. Top positioning flange, 11. Umbrella skirt, 12. Stress cone, 12.1. Abutting tapered surface, 13. Stress cone support assembly, 13.1. Stress cone support, 13.1.1. Tapered sleeve, 13.2. Spring, 13.3. Connecting ring. Detailed Implementation

[0023] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0024] like Figure 1-2 As shown, a high-voltage and ultra-high-voltage dry-type insulated outdoor terminal includes a body. The body includes an epoxy sleeve 2 for fixed connection with the end conductor of a cable 1. The insertion end of the epoxy sleeve 2 is sealed and fixedly connected to a connecting base 3. An outer sleeve 4 is sleeved on the outer layer of the epoxy sleeve 2. The insertion end of the outer sleeve 4 is also sealed and fixedly connected to the bottom of the connecting base. An insulating filler 5 is provided between the epoxy sleeve 2 and the outer sleeve 4. The insulating filler 5 can be SF6 (gaseous) or insulating paste (semi-solid).

[0025] The connecting base 3 is cylindrical. One end of the connecting base 3 is provided with an epoxy sleeve connecting flange 3.1 for sealing and fixing connection with the epoxy sleeve 2. The other end of the connecting base 3 is provided with an outer sleeve connecting flange 3.2 for sealing and fixing connection with the outer sleeve 4. The diameter of the outer sleeve connecting flange 3.2 is larger than the diameter of the epoxy sleeve connecting flange 3.1.

[0026] like Figure 2 , Figure 3 As shown, the connection between the epoxy sleeve 2 and the epoxy sleeve connecting flange 3.1 and the connection between the outer sleeve 4 and the outer sleeve connecting flange 3.2 are both fixedly connected by fasteners and are equipped with sealing rings 6.

[0027] like Figure 4 , Figure 6 As shown, a bottom connecting sleeve 7 is connected between the outer sleeve 4 and the outer sleeve connecting flange 3.2. The bottom connecting sleeve 7 is sleeved on the outer sleeve 4. The inner layer of the bottom connecting sleeve 7 is provided with a bottom positioning flange 7.1. A sealing ring 6 is provided between the bottom positioning flange 7.1 and the outer sleeve 4. A sealing ring 6 is also provided between the end of the bottom connecting sleeve 7 away from the outer sleeve 4 and the outer sleeve connecting flange 3.2.

[0028] like Figure 1 , Figure 5 , Figure 6 As shown, the outer sleeve 4 has a cap 8 at the end away from the insertion end. The cap 8 is sealed and fixedly connected to the outer sleeve 4. Both the cap 8 and the connecting base 3 are provided with a self-sealing valve 9. The self-sealing valve 9 is a conventional structure. A top connecting sleeve 10 is connected between the outer sleeve 4 and the cap 8. The top connecting sleeve 10 is sleeved on the outer sleeve 4. The inner layer of the top connecting sleeve 10 is provided with a top positioning flange 10.1. A sealing ring 6 is provided between the top positioning flange 10.1 and the outer sleeve 4. A sealing ring 6 is also provided between the end of the top connecting sleeve 10 away from the outer sleeve 4 and the cap 8.

[0029] After the epoxy sleeve 2, outer sleeve 4, and cap 8 are installed, the self-sealing valve 9 on the cap 8 is evacuated, while the self-sealing valve 9 on the connecting base 3 is injected with insulating filler 5. Compared with the traditional integrated outdoor terminal, the installation difficulty is reduced.

[0030] like Figure 1 As shown, the outer layer of the outer sleeve 4 is fitted with a skirt 11. The two ends of the skirt 11 abut against the ends of the bottom connecting sleeve 7 and the top connecting sleeve 10, respectively. The skirt 11 is usually arranged with one large and one small interval.

[0031] like Figure 1 , Figure 2 , Figure 7As shown, the inner layer of the epoxy sleeve 2 has a tapered hole 2.1. A stress cone 12 is sleeved on the end conductor of the cable 1. The tapered hole 2.1 fits into the stress cone 12. The body also includes a stress cone support assembly 13. The stress cone support assembly 13 is used to compress the stress cone 12 and move it towards the smaller diameter of the tapered hole 2.1 to fix the cable 1. The stress cone support assembly 13 includes a stress cone support 13.1, a spring 13.2, and a connecting ring 13.3. The outer ring of the connecting ring 13.3 is fastened to the bottom of the connection by fasteners. The inner ring of the connecting ring 13.3 is axially elastically connected to the stress cone support 13.1 via a spring 13.2. The spring 13.2 is sleeved on an axial rod to ensure the axiality of the elastic force of the spring 13.2. The stress cone 12 has an abutting conical surface 12.1 on the side near the stress cone support 13.1. The stress cone support 13.1 has a conical sleeve 13.1.1 on the side near the stress cone 12 that abuts against the abutting conical surface 12.1. The conical sleeve 13.1.1 fits into the abutting conical surface 12.1.

[0032] By using high-voltage and ultra-high-voltage dry-type insulated outdoor terminals, the conventional integrated outdoor terminals are disassembled, reducing the difficulty of installing outdoor terminals under high-altitude conditions, making it easier to ensure installation quality, thereby ensuring operational safety and stability, and also reducing production costs.

[0033] The above description only illustrates the preferred embodiment of this utility model and should not be construed as limiting the scope of the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are also within the scope of protection of this utility model.

Claims

1. A high-voltage and ultra-high-voltage dry-type insulated outdoor terminal, comprising a body, characterized in that: The body includes an epoxy sleeve (2) for fixed connection with the end conductor of the cable (1). The insertion end of the epoxy sleeve (2) is sealed and fixedly connected to a connecting base (3). An outer sleeve (4) is sleeved on the outer layer of the epoxy sleeve (2). The insertion end of the outer sleeve (4) is also sealed and fixedly connected to the bottom of the connecting base. An insulating filler (5) is provided between the epoxy sleeve (2) and the outer sleeve (4).

2. The high-voltage and ultra-high-voltage dry-type insulated outdoor terminal according to claim 1, characterized in that: The connecting base (3) is cylindrical. One end of the connecting base (3) is provided with an epoxy sleeve connecting flange (3.1) for sealing and fixing connection with the epoxy sleeve (2). The other end of the connecting base (3) is provided with an outer sleeve connecting flange (3.2) for sealing and fixing connection with the outer sleeve (4). The diameter of the outer sleeve connecting flange (3.2) is larger than the diameter of the epoxy sleeve connecting flange (3.1).

3. The high-voltage and ultra-high-voltage dry-type insulated outdoor terminal according to claim 2, characterized in that: The connection between the epoxy sleeve (2) and the epoxy sleeve connecting flange (3.1) and the connection between the outer sleeve (4) and the outer sleeve connecting flange (3.2) are all fixedly connected by fasteners and are all provided with sealing rings (6).

4. The high-voltage and ultra-high-voltage dry-type insulated outdoor terminal according to claim 3, characterized in that: A bottom connecting sleeve (7) is connected between the outer sleeve (4) and the outer sleeve connecting flange (3.2). The bottom connecting sleeve (7) is sleeved on the outer sleeve (4). The inner layer of the bottom connecting sleeve (7) is provided with a bottom positioning flange (7.1). A sealing ring (6) is provided between the bottom positioning flange (7.1) and the outer sleeve (4). A sealing ring (6) is also provided between the end of the bottom connecting sleeve (7) away from the outer sleeve (4) and the outer sleeve connecting flange (3.2).

5. The high-voltage and ultra-high-voltage dry-type insulated outdoor terminal according to claim 1, characterized in that: The outer tube (4) is provided with a cap (8) at the end away from the insertion end. The cap (8) is sealed and fixedly connected to the outer tube (4). A self-sealing valve (9) is provided on both the cap (8) and the connecting base (3).

6. The high-voltage and ultra-high-voltage dry-type insulated outdoor terminal according to claim 5, characterized in that: A top connecting sleeve (10) is connected between the outer sleeve (4) and the cap (8). The top connecting sleeve (10) is fitted onto the outer sleeve (4). The inner layer of the top connecting sleeve (10) is provided with a top positioning flange (10.1). A sealing ring (6) is provided between the top positioning flange (10.1) and the outer sleeve (4). A sealing ring (6) is also provided between the end of the top connecting sleeve (10) away from the outer sleeve (4) and the cap (8).

7. The high-voltage and ultra-high-voltage dry-type insulated outdoor terminal according to claim 1, characterized in that: The outer layer of the outer tube (4) is fitted with an umbrella skirt (11).

8. The high-voltage and ultra-high-voltage dry-type insulated outdoor terminal according to claim 1, characterized in that: The inner layer of the epoxy sleeve (2) is provided with a tapered hole (2.1), and a stress cone (12) is sleeved on the end conductor of the cable (1). The tapered hole (2.1) fits with the stress cone (12). The body also includes a stress cone support assembly (13), which is used to squeeze the stress cone (12) to move towards the small diameter of the tapered hole (2.1) to fix the cable (1).

9. The high-voltage and ultra-high-voltage dry-type insulated outdoor terminal according to claim 8, characterized in that: The stress cone support assembly (13) includes a stress cone support (13.1), a spring (13.2) and a connecting ring (13.3). The outer ring of the connecting ring (13.3) is fixedly connected to the bottom of the connection by fasteners, and the inner ring of the connecting ring (13.3) is axially elastically connected to the stress cone support (13.1) by the spring (13.2).

10. The high-voltage and ultra-high-voltage dry-type insulated outdoor terminal according to claim 9, characterized in that: The stress cone (12) has an abutting conical surface (12.1) on the side near the stress cone support (13.1), and the stress cone support (13.1) has a conical sleeve (12.1) on the side near the stress cone (12) that abuts against the abutting conical surface (12.1). 13.1.1), the conical sleeve (13.1.1) fits into the abutting conical surface (12.1).

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