A GIL inner cone connection structure for gas-insulated cabinets

Abstract

This utility model relates to an inner cone connection structure for a gas-insulated switchgear (GIL), belonging to the technical field of GIL equipment. It includes an inner cone female connector, an inner cone male connector, and an inner cone cover plate. The inner cone cover plate connects to the inner cone female connector, and the inner cone male connector connects to the insulating tube female connector inside the gas-insulated switchgear. One end of the inner cone female connector has a insertion cavity for mating with the inner cone male connector, and the other end of the inner cone female connector has a connecting conductor that is crimped into contact with the contacts of the GIL. This application improves the compatibility between the GIL and the gas-insulated switchgear and enhances the current-carrying capacity of the gas-insulated switchgear.

Description

Technical Field

[0001] This utility model relates to the technical field of GIL equipment, and in particular to a GIL inner cone connection structure for gas-insulated cabinets. Background Technology

[0002] With the rapid expansion and vigorous development of my country's ultra-high voltage power grid, my country's power grid will achieve a leap from ultra-high voltage to extra-high voltage. In the extra-high voltage power transmission and transformation system, the safety of gas-insulated metal-enclosed transmission lines (GILs) is the foundation for the stable operation of the extra-high voltage power grid. GILs are high-voltage, high-current, long-distance power transmission equipment, and their full name is gas-insulated metal-enclosed transmission line. GILs are mostly used in conjunction with gas-insulated switchgear. However, as the voltage level and current increase, the GIL itself also increases, and therefore the connection surface between the GIL and the gas-insulated switchgear also increases. But this change is not conducive to the miniaturization, standardization, and high-current design of gas-insulated switchgear, and to some extent affects the compatibility between GILs and gas-insulated switchgear. Utility Model Content

[0003] To facilitate the connection between the gas-insulated switchgear (GIL) and the gas-insulated switchgear, this application provides a GIL inner cone connection structure for the gas-insulated switchgear.

[0004] This application provides a GIL inner cone connection structure for gas-insulated cabinets, which adopts the following technical solution:

[0005] A gas-insulated switchgear (GIL) inner cone connection structure for connecting a GIL to a gas-insulated switchgear includes an inner cone female and an inner cone male. The inner cone male connects to an insulating tube female inside the gas-insulated switchgear. One end of the inner cone female has a plug-in cavity that engages with the inner cone male. The other end of the inner cone female has a connecting conductor that is crimped into the contacts of the GIL.

[0006] By adopting the above technical solution, in practical applications, it is necessary to first select the corresponding inner conical female head according to the voltage level and current size, and then install the inner conical male head that is compatible with the inner conical female head at the end of the insulating tube. This allows for the connection of different specifications of GILs with gas-insulated cabinets without changing the gas-insulated cabinet, which not only effectively improves the compatibility between GILs and gas-insulated cabinets, but also improves the current carrying capacity of the gas-insulated cabinet.

[0007] Preferably, it also includes an inner conical cover plate for providing support for the inner conical female head, the inner conical cover plate having a corresponding connecting through hole for the inner conical male head to pass through, and the inner conical cover plate having a fixing member for fixing the inner conical female head.

[0008] By adopting the above technical solution, the inner cone cover plate, as the carrier for connecting the inner cone female head and the inner cone male head, can provide support for the connection between the inner cone male head and the inner cone female head, and provide positioning for the connection between the inner cone female head, thereby improving the reliability of fixing the inner cone male head and the inner cone female head to a certain extent.

[0009] Preferably, the fastener includes a fixing bolt, the inner conical cover plate has a fixing through hole for the fixing bolt to pass through, the inner conical female head has a fixing threaded hole that mates with the fixing bolt thread, and the inner conical cover plate has a fixing countersunk hole for accommodating the bolt head, the fixing countersunk hole communicating with the fixing through hole.

[0010] By adopting the above technical solution, the inner cone cover plate and the inner cone female head are connected by fixing bolts, which facilitates the installation of the inner cone female head. The setting of the fixing countersunk hole is used to accommodate the screw head of the fixing bolt, so that there is no gap between the inner cone cover plate and the gas insulation cabinet.

[0011] Preferably, the inner conical female head has a positioning part at one end with a insertion cavity, and the inner conical cover plate has a positioning cavity for the positioning part to fit into, and the positioning cavity is connected to the connecting through hole.

[0012] By adopting the above technical solution, the positioning part and positioning cavity provide positioning for the installation of the inner conical female head. On the one hand, it is convenient for the inner conical female head to move to the fixing through hole and the fixing bolt hole for connection. On the other hand, it makes it less likely for the inner conical female head to have displacement relative to the inner conical cover plate, thereby improving the reliability of the inner conical female head being fixed on the inner conical cover plate.

[0013] Preferably, the end of the inner conical female head is provided with a first sealing ring, and the inner conical female head is provided with a first sealing groove for the first sealing ring to fit into, and the fixing threaded hole is located inside the first sealing groove.

[0014] By adopting the above technical solution, the first sealing groove and the first sealing ring cooperate to provide protection for the connection between the inner conical female head and the inner conical cover plate, making it difficult for external liquids or impurities to enter the insertion cavity, thus ensuring the reliability of the connection between the inner conical male head and the inner conical female head.

[0015] Preferably, the insulating tube is flexibly configured.

[0016] By adopting the above technical solution, the flexible insulating female tube can drive the inner conical male tube to bend so that the inner conical male tube can move into the insertion cavity, which facilitates the connection between the inner conical female tube and the inner conical male tube.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. The appropriate inner conical female head can be selected according to the voltage level and current size. Then, an inner conical male head that fits into the inner conical female head can be installed at the end of the insulating tube. This allows for the connection of different specifications of GILs to the gas insulation cabinet without changing the gas insulation cabinet. This not only effectively improves the compatibility between GILs and gas insulation cabinets, but also improves the current carrying capacity of the gas insulation cabinet.

[0019] 2. The inner cone cover plate serves as the carrier for connecting the inner cone female head and the inner cone male head. It provides support for the connection between the inner cone male head and the inner cone female head, and provides positioning for the connection between the inner cone female head, thereby improving the reliability of the fixing of the inner cone male head and the inner cone female head to a certain extent. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0021] Figure 2 The embodiment of this application is a triangular outgoing line connection scheme for a three-phase common-phase inner cone connection structure of GIL.

[0022] Figure 3 yes Figure 2 Enlarged view of part A.

[0023] Figure 4 The embodiment of this application is a one-line outgoing line connection scheme for the GIL three-phase common-phase inner cone connection structure.

[0024] Figure 5 The embodiment of this application is a single-phase inner cone connection structure with a straight-line outgoing line connection scheme for GIL.

[0025] Explanation of reference numerals in the attached drawings: 1. GIL; 11. Control conductor; 111. Contact; 12. Metal casing; 13. Insulating medium; 2. Gas insulation cabinet; 21. Insulating female tube; 22. Inner conical male head; 3. Inner conical female head; 31. Insertion cavity; 32. Connecting conductor; 4. Inner conical cover plate; 41. Connecting through hole; 42. Fixing bolt; 421. Fixing through hole; 422. Fixing threaded hole; 423. Fixing countersunk hole; 43. Positioning part; 431. Positioning cavity; 44. First sealing groove; 441. First sealing ring. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-5 The present invention will be described in further detail below.

[0027] This application discloses an inner cone connection structure for a gas-insulated cabinet 2 (GIL1) for connecting GIL1 to the gas-insulated cabinet 2. GIL1 mainly includes a control conductor 11, a metal shell 12, and an insulating medium 13. A contact 111 is fixed on the control conductor 11 of GIL1, and the insulating tube 21 inside the gas-insulated cabinet 2 has a lead wire.

[0028] Reference Figure 1 and Figure 2 It includes an inner conical female head 3 and an inner conical male head 22. The inner conical male head 22 is fixed to the end of the insulating tube 21. One end of the inner conical female head 3 is provided with a plug-in cavity 31 that is inserted and matched with the inner conical male head 22. The insulating tube 21 is flexibly set so that the insulating tube 21 can drive the inner conical male head 22 to bend so that the inner conical male head 22 can move into the plug-in cavity 31, which facilitates the connection between the inner conical female head 3 and the inner conical male head 22. The other end of the inner conical female head 3 is provided with a connecting conductor 32, which is pressed and matched with the contact 111.

[0029] Reference Figure 2 and Figure 3 It also includes an inner cone cover plate 4 for providing support for the inner cone female head 3. The inner cone cover plate 4 serves as a carrier for connecting the inner cone female head 3 and the inner cone male head 22. In the actual installation process, the inner cone cover plate 4 is made to fit against the outer wall of the gas insulation cabinet 2. The inner cone cover plate 4 can be connected to the gas insulation cabinet 2 by bolts. Thus, the inner cone cover plate 4 can provide support for the connection between the inner cone male head 22 and the inner cone female head 3, which can improve the reliability of fixing the inner cone male head 22 and the inner cone female head 3 to a certain extent.

[0030] Reference Figure 2 and Figure 3 The inner conical cover plate 4 has a corresponding through hole 41 for the inner conical male head 22 to pass through. The inner conical cover plate 4 has a fixing component for fixing the inner conical female head 3. The fixing component includes a fixing bolt 42. The inner conical cover plate 4 has a fixing through hole 421 for the fixing bolt 42 to pass through. The inner conical female head 3 has a fixing threaded hole 422 that is threaded with the fixing bolt 42. The inner conical cover plate 4 has a fixing countersunk hole 423 for accommodating the fixing screw head. The fixing countersunk hole 423 is connected to the fixing through hole 421. The inner conical cover plate 4 and the inner conical female head 3 are connected by the fixing bolt 42, which facilitates the installation of the inner conical female head 3. The fixing countersunk hole 423 is set to accommodate the screw head of the fixing bolt 42, so that there is no gap between the inner conical cover plate 4 and the gas insulation cabinet 2.

[0031] Reference Figure 3 The inner conical female head 3 has a insertion cavity 31 at one end, which includes a positioning part 43 arranged in an annular shape. The inner conical cover plate 4 is provided with a positioning cavity 431 for the positioning part 43 to fit into. The positioning cavity 431 is connected to the connecting through hole 41. The positioning part 43 and the positioning cavity 431 provide positioning for the installation of the inner conical female head 3. On the one hand, it is convenient for the inner conical female head 3 to move to the fixing through hole 421 and connect with the fixing bolt 42 hole. On the other hand, it makes it less likely for the inner conical female head 3 to have displacement relative to the inner conical cover plate 4, thereby improving the reliability of the inner conical female head 3 fixed on the inner conical cover plate 4.

[0032] Reference Figure 3The inner conical female head 3 is provided with a first sealing ring 441 at its end. The inner conical female head 3 is provided with a first sealing groove 44 for the first sealing ring 441 to fit into. The fixed threaded hole 422 is located inside the first sealing groove 44. The first sealing groove 44 and the first sealing ring 441 cooperate to provide protection for the connection between the inner conical female head 3 and the inner conical cover plate 4, so that external liquids or impurities are not easy to enter the insertion cavity 31, thus ensuring the reliability of the connection between the inner conical male head 22 and the inner conical female head 3.

[0033] Reference Figure 2 , Figure 4 and Figure 5 The connection structure between GIL1 and gas-insulated cabinet 2 in this application embodiment has wide applicability. This application shows a three-phase common-phase inner cone connection structure with a triangular outgoing line connection scheme, a three-phase common-phase inner cone connection structure with a straight-line outgoing line connection scheme, and a single-phase inner cone connection structure with a straight-line outgoing line connection scheme.

[0034] In practical applications, the appropriate inner conical female connector 3 must first be selected according to the voltage level and current magnitude, and a corresponding inner conical cover plate 4 must be manufactured. The inner conical female connector 3 is first fixed to the inner conical cover plate 4 using fixing bolts 42. Then, the connecting conductor 32 is pressed against the contact 111. After the inner conical cover plate 4 is sealed and fixed to the metal shell 12 in the DIL, an insulating medium 13 can be filled into the metal shell 12. The insulating medium 13 can be composed of one or a mixture of nitrogen or SF6. Then, an inner conical male connector 22, which mates with the inner conical female connector 3, is installed at the end of the insulating tube 21. This allows for the connection of different specifications of GIL1 to the gas insulation cabinet 2 without altering the gas insulation cabinet 2, effectively improving the compatibility between GIL1 and the gas insulation cabinet 2, and also enhancing the current-carrying capacity of the gas insulation cabinet 2.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A GIL inner cone connection structure for a gas-insulated cabinet, used to connect a GIL (1) to a gas-insulated cabinet (2), characterized in that, It includes an inner conical female head (3) and an inner conical male head (22). The inner conical male head (22) is connected to the insulating tube female head (21) inside the gas insulation cabinet (2). One end of the inner conical female head (3) is provided with a plug-in cavity (31) that is plugged into the inner conical male head (22). The other end of the inner conical female head (3) is provided with a connecting conductor (32). The connecting conductor (32) is crimped into the contact (111) of the GIL (1).

2. The GIL inner cone connection structure for a gas-insulated cabinet according to claim 1, characterized in that, It also includes an inner cone cover plate (4) for providing support for the inner cone female head (3), and the inner cone cover plate (4) is provided with a corresponding connecting through hole (41) for the inner cone male head (22) to pass through, and the inner cone cover plate (4) is provided with a fixing member for fixing the inner cone female head (3).

3. The GIL inner cone connection structure for gas-insulated cabinets according to claim 2, characterized in that, The fastener includes a fixing bolt (42), the inner cone cover plate (4) is provided with a fixing through hole (421) for the fixing bolt (42) to pass through, the inner cone female head (3) is provided with a fixing threaded hole (422) that is threaded with the fixing bolt (42), the inner cone cover plate (4) is provided with a fixing countersunk hole (423) for accommodating the screw head of the fixing bolt (42), and the fixing countersunk hole (423) is connected to the fixing through hole (421).

4. The GIL inner cone connection structure for a gas-insulated cabinet according to claim 2, characterized in that, The inner conical head (3) has a positioning part (43) at one end with a insertion cavity (31). The inner conical cover plate (4) has a positioning cavity (431) for the positioning part (43) to fit into. The positioning cavity (431) is connected to the connecting through hole (41).

5. The GIL inner cone connection structure for a gas-insulated cabinet according to claim 3, characterized in that, The end of the inner conical head (3) is provided with a first sealing ring (441), and the inner conical head (3) is provided with a first sealing groove (44) for the first sealing ring (441) to fit into. The fixed threaded hole (422) is located inside the first sealing groove (44).

6. The GIL inner cone connection structure for a gas-insulated cabinet according to claim 1, characterized in that, The insulating tube (21) is flexibly designed.

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