High-voltage one-to-three-phase gas-insulated metal-enclosed isolation grounding switch equipment

Abstract

The utility model relates to a high-voltage one-to-three-phase gas insulation metal enclosed isolation grounding switch device, which comprises a sleeve branch and a switch assembly, the switch assembly comprises a shell, a straight conductor, a triangular conductor and three isolation grounding switch assemblies, the straight conductor, the triangular conductor and the three isolation grounding switch assemblies are arranged in the shell, and the shell is provided with a single-phase insulator and a three-phase insulator. One end of the straight conductor is connected with a single-phase conductor of the single-phase insulator, the other end of the straight conductor is connected with the triangular conductor, one ends of the three isolation grounding switch assemblies are respectively connected with a three-phase conductor of the three-phase insulator, and the other ends of the three isolation grounding switch assemblies are all connected with the triangular conductor; the sleeve branch comprises an outgoing line sleeve, a bent pipe branch bus and a straight pipe branch bus which are connected in sequence, and the straight pipe branch bus is connected with the single-phase insulator. The device is compact in structure and simple to operate, can realize rapid butt joint with a GIS product, does not need repeated operation during a test, is convenient to use, and greatly improves the test efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to high voltage power equipment technical field, specifically point to a high voltage one three phase gas insulation metal enclosed isolated grounding switch equipment. BACKGROUND

[0002] The combined electric appliance needs to carry out insulation test before leaving factory, namely, power frequency withstand voltage test and impact test, to ensure the safety and stability of the combined electric appliance. To carry out insulation test on GIS product before leaving factory, a connecting device is needed to connect power frequency insulation test transformer and impact voltage generator with GIS product, and the connecting device needs to have the requirements of high voltage resistance, withstand multi-frequency voltage resistance work, long service life and can pressurize any phase of three phases of 220kV voltage grade GIS product. The existing connecting device adopts single-phase outgoing line mode to carry out on-site test on GIS three-phase bus respectively, so after completing one phase bus test, the connecting device needs to be reconnected, gas is filled, and grounding is carried out, which leads to repeated operation, complicated operation, long test period and low efficiency, and seriously hinders the production progress of GIS product. SUMMARY

[0003] The utility model provides a kind of high voltage one three phase gas insulation metal enclosed isolated grounding switch equipment for the deficiency of prior art, with compact structure, simple operation, can realize and GIS product are quickly connected, do not need repeated operation when testing, convenient to use, greatly improve test efficiency.

[0004] The utility model is through following technical scheme realizes, a kind of high voltage one three phase gas insulation metal enclosed isolated grounding switch equipment, including bushing branch and switch assembly, the switch assembly includes shell, and the straight conductor, triangular conductor and three isolated grounding switch components in shell, single-phase insulator and three-phase insulator are equipped on the shell, the single-phase conductor of single-phase insulator is connected with the one end of straight conductor, and the other end of straight conductor is connected with the triangular conductor, the three isolated grounding switch components are connected with the three-phase conductor of three-phase insulator respectively in one end, and the other end of three isolated grounding switch components is all connected with triangular conductor;The bushing branch includes outgoing line bushing, elbow branch busbar and straight pipe branch busbar connected in sequence, and the straight pipe branch busbar is connected with the single-phase insulator.

[0005] As optimization, the straight conductor includes transition conductor and hollow conductor, the one end of transition conductor is connected with the single-phase insulator, the hollow conductor is connected with the other end of transition conductor, and the end, away from transition conductor, of hollow conductor is screwed with conductor shield cover, and the middle part of triangular conductor is equipped with first screw hole, and first screw hole is screwed and fixed with the side wall of hollow conductor.

[0006] As optimization, the isolation grounding switch assembly comprises a static side assembly, an isolation grounding moving side assembly, an isolation switch operating mechanism and a grounding switch.

[0007] As optimization, the static side assembly comprises a static contact seat and a conductive spring, second screw holes are arranged at three end corners of the delta conductor, one end of the static contact seat is screwed with the second screw holes, and a contact plug hole is arranged at the other end of the static contact seat, and the conductive spring is fixedly arranged in the contact plug hole.

[0008] As optimization, the isolation grounding moving side assembly comprises an isolation moving contact seat and a grounding moving support, one end of the grounding moving support is connected with the conductor of the three-phase insulator, the other end of the grounding moving support is connected with the isolation moving contact seat, the isolation moving contact seat, the grounding moving support and the static contact seat are coaxial, and a moving contact head moving in the axial direction is arranged in the isolation moving contact seat.

[0009] As optimization, the isolation switch operating mechanism comprises a gear shaft rotatably arranged on the isolation moving contact seat, a gear arranged on the outer wall of the gear shaft is engaged with a gear rack fixedly arranged on the moving contact head, a rotating shaft coaxial with the gear shaft is rotatably arranged on the shell, one end of the rotating shaft is in transmission connection with the gear shaft through an insulating rod, and a rotating handle is fixedly arranged at the other end of the rotating shaft.

[0010] As optimization, the grounding switch comprises a sealing mounting seat fixedly arranged on the shell, a sliding rod is slidably arranged on the sealing mounting seat, the sliding direction of the sliding rod is perpendicular to the axial direction of the grounding moving support, a grounding contact handle in contact with the grounding moving support is arranged at one end of the sliding rod, a grounding seat is arranged at the other end of the sliding rod, and a pressing handle is arranged at the end of the grounding seat away from the sliding rod.

[0011] As optimization, a buckle baffle is fixedly arranged at the end of the sealing mounting seat close to the grounding seat, a buckle groove is arranged on the buckle baffle, a buckle block matched with the buckle groove is arranged on the grounding seat, and the buckle block is in clamping fixation with the buckle groove when the grounding contact handle is in contact with the grounding moving support.

[0012] As optimization, the grounding contact handle is arranged in axial sliding mode on the sliding rod, and a contact handle spring is arranged between the grounding contact handle and the sliding rod.

[0013] The utility model discloses a beneficial effect is: the present scheme is through a sleeve branch connection power frequency insulation test transformer power supply, through the transition of straight conductor and delta conductor distributes voltage to three isolation grounding switch assemblies, realizes one three-phase power supply, thereby can carry out insulation experiment to GIS three -phase bus respectively, can exempt from the present connecting equipment to carry out butt joint, gas filling, grounding etc. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the utility model;

[0015] Figure 2 It is Figure 1 the A part enlarged view of;

[0016] Figure 3 It is a switch assembly structure schematic view;

[0017] Figure 4 It is three isolating switch operating mechanism distribution schematic view;

[0018] Figure 5 It is three ground switch distribution schematic view;

[0019] Figure 6 It is Figure 5 the B part enlarged view of;

[0020] Figure 7 It is isolation ground moving side assembly right section view;

[0021] Figure 8 It is isolation moving contact seat side section view;

[0022] Figure 9 It is ground switch section view;

[0023] Figure 10 It is Figure 9 the C part enlarged view of;

[0024] Figure 11 It is triangular conductor front view;

[0025] Figure 12 It is triangular conductor side section view;

[0026] As shown in the figure:

[0027] 1, sleeve branch, 11, outgoing line sleeve, 12, elbow pipe branch bus, 13, straight pipe branch bus, 14, gas filling hole;

[0028] 2, shell, 21, single-phase insulator, 22, three-phase insulator, 23, first installation hole, 24, second installation hole;

[0029] 3, isolation ground switch assembly, 31, static side assembly, 311, static contact seat, 312, conductive spring, 313, static contact seat shield, 314, contact insertion hole;

[0030] 32, isolation ground moving side assembly, 321, isolation moving contact seat, 321A, insertion hole, 322, ground moving support, 323, moving contact, 324, contact finger, 325, moving contact seat shield, 326, moving side shield seat, 327, moving contact seat shield;

[0031] 33, disconnecting switch operating mechanism, 331, gear shaft, 332, rotating shaft, 333, insulating rod, 334, bearing seat, 335, rotating handle;

[0032] 34, grounding switch, 341, sealed mounting seat, 341A, compression spring, 341B, copper pad, 341C, sealing ring, 341D, guide ring, 342, sliding rod, 342A, blind hole, 342B, limiting sliding slot, 342C, limiting rod, 343, grounding handle, 344, grounding seat, 344A, clamping block, 345, pressing handle, 346, clamping baffle, 346A, sealing cover plate, 346B, clamping plate, 347, clamping groove, 347A, circular sunken groove, 347B, rectangular clamping hole, 348, sealing ring, 349, handle spring;

[0033] 4, straight conductor, 41, transition conductor, 42, hollow conductor, 43, conductor shielding cover;

[0034] 5, delta conductor, 51, first threaded hole, 52, second threaded hole, 53, third threaded hole, 54, weight-reducing hole. DETAILED DESCRIPTION

[0035] In order to clearly illustrate the technical features of the present application, the present application will be described below through specific embodiments.

[0036] As shown in Figures 1-12 , a high-voltage three-phase gas-insulated metal-enclosed isolating grounding switch device includes a bushing branch 1 and a switch assembly. The switch assembly includes a housing 2, and a straight conductor 4, a delta conductor 5 and three isolating grounding switch assemblies 3 located in the housing 2. Single-phase insulators 21 and three-phase insulators 22 are provided on the housing 2. One end of the straight conductor 4 is connected to a single-phase conductor of the single-phase insulators 21, and the other end of the straight conductor 4 is connected to the delta conductor 5. One end of each of the three isolating grounding switch assemblies 3 is connected to a three-phase conductor of the three-phase insulators 22, and the other end of each of the three isolating grounding switch assemblies 3 is connected to the delta conductor 5. The bushing branch 1 includes an outgoing line bushing 11, a bent branch bus 12 and a straight branch bus 13 connected in sequence. The straight branch bus 13 is connected to the single-phase insulators 21.

[0037] As shown in Figure 1 , specifically, the single-phase insulators 21 are located on the outer wall of the housing 2, and the three-phase insulators 22 are located at one end of the housing 2. The axes of the single-phase insulators 21 and the three-phase insulators 22 are arranged perpendicularly. The straight branch bus 13 is coaxially arranged with the single-phase insulators 21, and the internal conductor of the straight branch bus 13 is connected to the single-phase conductor of the single-phase insulators 21.

[0038] The bending angle of the elbow branch bus 12 is 90°-120°, and the internal conductor of the elbow branch bus 12 is connected with the internal conductor of the straight branch bus 13. The internal conductor of the outgoing sleeve 11 is connected with the internal conductor of the elbow branch bus 12, and the end of the outgoing sleeve 11 away from the elbow branch bus 12 is used for connecting with the power frequency insulation test transformer, so as to form a conductive path for supplying power to the switch assembly. The outgoing sleeve is connected through the transition of the elbow branch bus and the straight branch bus, so that the voltage transmitted by the power frequency insulation test transformer is more stable, and the outgoing sleeve is inclined through the bending transition of the elbow branch bus, which is convenient for connecting with the power frequency insulation test transformer and is more convenient to install.

[0039] As shown in Figure 1 , specifically, the elbow branch bus 12, the straight branch bus 13, and the outer wall of the shell 2 are all provided with SF6 gas filling holes. During the test, SF6 gas is filled into the elbow branch bus, the straight branch bus, and the shell through the gas filling holes, so that the sleeve branch and the switch assembly form two insulation gas chambers to prevent electric leakage.

[0040] As shown in Figure 2 , specifically, the straight conductor 4 is coaxially arranged with the single-phase insulator 21, and the single-phase insulator 21 and the delta conductor 5 are connected through the straight conductor 4, so as to guide the voltage flow and make the electric field in the shell 2 more stable. The straight conductor 4 includes a transition conductor 41 and a hollow conductor 42, one end of the transition conductor 41 is connected with the single-phase insulator 21, and the other end of the hollow conductor 42 is connected with the transition conductor 41, and a conductor shielding cover 43 is screwed on the end of the hollow conductor 42 away from the transition conductor 41.

[0041] As shown in Figure 2 , 11 , the middle part of the delta conductor 5 is provided with a first screw hole 51, and the first screw hole 51 is fixedly screwed with the side wall of the hollow conductor 42. In this embodiment, the middle part of the delta conductor 5 is annularly distributed and provided with a plurality of first screw holes 51, and bolts are arranged in the first screw holes to connect and fix the hollow conductor. The conductor shielding cover 43 is also connected and fixed with the hollow conductor 41 through bolts, and a hand hole is arranged in the middle part of the hollow conductor to facilitate tightening the bolts by hand, so that the installation is convenient.

[0042] Specifically, the three-phase insulator 22 is used for connecting with the GIS three-phase bus to be tested, and the three phases of the GIS three-phase bus are respectively connected with the three phases of the three-phase insulator one by one, so as to realize the insulation test of the three-phase bus through the control of the three isolation grounding switch assemblies.

[0043] As shown in Figure 3 , the isolation grounding switch assembly 3 includes a static side assembly 31, an isolation grounding moving side assembly 32, an isolation switch operating mechanism 33, and a grounding switch 34.

[0044] As Figure 11 , 12 shown, specifically, the static side assembly 31 includes a static contact seat 311 and a conductive spring 312, the three end angles of the triangular conductor 5 are each provided with a second threaded hole 52, one end of the static contact seat 311 is screwed with the second threaded hole 52, and the other end of the static contact seat 311 is provided with a contact insertion hole 314, and the conductive spring 312 is fixedly arranged in the contact insertion hole 314.

[0045] Preferably, two second threaded holes 52 are arranged at each end angle of the triangular conductor 5 in the embodiment, and the static contact seat 311 is connected and fixed with the second threaded holes 52 by two bolts. A third threaded hole 53 is arranged between the two second threaded holes, a static contact seat shielding cover 313 is arranged on the side of the triangular conductor 5 away from the static contact seat 311, and the static contact seat shielding cover 313 is screwed on the third threaded hole 53 by a bolt, thereby preventing the end of the static contact seat from leaking electricity.

[0046] Preferably, two weight-reducing holes 54 are further arranged on the triangular conductor 5 in the embodiment, thereby reducing the weight of the device.

[0047] As Figure 3 , 7 shown, specifically, the isolation ground moving side assembly 32 includes an isolation moving contact seat 321 and a ground moving support 322, one end of the ground moving support 322 is connected with one phase conductor of the three-phase insulator 22, the other end of the ground moving support 322 is connected with the isolation moving contact seat 321, and the isolation moving contact seat 321, the ground moving support 322 and the static contact seat 311 are coaxial. A moving contact 323 is arranged in the isolation moving contact seat 321 and moves along the axial direction, the moving contact 323 moves along the axial direction and is inserted into the contact insertion hole 314 of the static contact seat 311 by the driving of the disconnecting switch operating mechanism 33, thereby forming a conductive path for the one-phase GIS bus corresponding to the isolation ground switch assembly. The ground switch 34 is in contact with the ground moving support 322, thereby forming a grounding path for the one-phase GIS bus corresponding to the isolation ground switch assembly.

[0048] Preferably, a moving side shielding seat 326 is fixedly screwed on the conductor of the three-phase insulator 22 in the embodiment, the ground moving support 322 and the moving side shielding seat 326 are connected and fixed by a bolt, thereby preventing the end of the ground moving support from leaking electricity. A contact finger 324 is fixedly screwed on one end of the isolation moving contact seat 321 away from the ground moving support 322, and a moving contact seat shielding cover 325 is threadedly connected to the outer wall of the contact finger 324, thereby preventing the end of the isolation moving contact seat from leaking electricity.

[0049] As Figure 4As shown, in particular, the isolating switch operating mechanism 33 comprises a gear shaft 331 rotatably installed on the isolating movable contact seat 321, the gear on the outer wall of the gear shaft 331 is engaged with the gear rack fixed on the movable contact 323, the shell 2 rotatably supports a rotating shaft 332 coaxial with the gear shaft 331, one end of the rotating shaft 332 is in transmission connection with the gear shaft 331 through an insulating rod 333, and the other end of the rotating shaft 332 is fixedly provided with a rotating handle 335. By rotating the rotating handle 335 to drive the rotating shaft 332 to rotate, the rotating shaft 332 drives the gear shaft 331 to rotate through the insulating rod 333, so as to realize the axial movement of the movable contact 323 and the connection or disconnection with the contact insertion hole 314, and realize the opening and closing of the isolating switch, which is convenient to use.

[0050] As shown in Figure 4 , 5 , the outer wall of the shell 2 of the embodiment is circumferentially provided with three first installation holes 23 for installing the isolating switch operating mechanism 33, and three second installation holes 24 for installing the grounding switch 34.

[0051] As shown in Figure 7 , the gear shaft 331 of the embodiment is rotatably installed in the vertical pipe seat of the isolating movable contact seat 321 through a bearing, and the movable contact seat shield 327 is bolted on the port of the vertical pipe seat. The outer wall of the movable contact 323 is provided with a gear rack slot along the length direction, the gear rack is fixedly connected in the gear rack slot, and the axial direction of the gear shaft 331 is perpendicular to the axial direction of the movable contact 323, so that the gear on the outer wall of the gear shaft is engaged with the gear rack, thereby driving the rotation of the movable contact.

[0052] As shown in Figure 3 , 8 , the outer wall of the vertical pipe seat of the isolating movable contact seat 321 is provided with an insertion hole 321A for the insulating rod 333 to pass through, and one end of the insulating rod is connected and fixed with the gear shaft 331 through the insertion hole 321A.

[0053] As shown in Figure 4 , the first installation hole 23 is fixedly provided with a bearing seat 334, the rotating shaft 332 is rotatably connected with the bearing seat 334 through a bearing, and the other end of the insulating rod 333 and the rotating shaft 332 are fixedly connected.

[0054] As shown in Figure 9As shown, specifically, the grounding switch 34 includes a sealing mounting seat 341 fixed on the shell 2, a sliding rod 342 is arranged on the sealing mounting seat 341 in sliding mode, the sliding direction of the sliding rod 342 is perpendicular to the axial direction of the grounding movable support 322, the sliding rod 342 is provided with a grounding contact handle 343 at one end which is in contact with the grounding movable support, and the sliding rod 342 is provided with a grounding seat 344 at the other end, the grounding seat 344 is in conductive connection with the ground, and the grounding seat 344 is provided with a pressing handle 345 away from the one end of the sliding rod 342. The pressing handle drives the sliding of the sliding rod, so that the grounding contact handle at the end of the sliding rod is in contact with or disconnected from the grounding movable support, thereby realizing the opening and closing of the grounding switch, which is convenient to use.

[0055] As shown in Figure 5 , 6 , the sealing mounting seat 341 is fixedly installed on the second mounting hole 24, and the sealing mounting seat 341 and the second mounting hole 24 are sealed by a sealing ring 348. The sealing mounting seat 341 is internally provided with a sliding hole, the sliding rod 342 is arranged in the sliding hole, and the sliding hole is provided with, in sequence along the axial direction, a compression spring 341A, a copper pad 341B, a plurality of sealing rings 341C and a plurality of guide rings 341D which are sequentially sleeved on the sliding rod 342, and the plurality of sealing rings 341C and the plurality of guide rings 341D are arranged at intervals. The sealing ring 341C is made of ethylene-propylene-diene rubber material and is used for sealing the sliding hole. The guide ring 341D is made of polytetrafluoroethylene material and is used for guiding the sliding of the sliding rod 342. The compression spring 341A is used for providing pre-tightening pressure to the sealing ring, so that the sealing ring is compressed and deformed, thereby playing a sealing role. The copper pad 341B prevents the compression spring from damaging the sealing ring.

[0056] As shown in Figure 6 , 9 , specifically, the sealing mounting seat 341 is fixedly connected with a buckle baffle 346 at one end close to the grounding seat 344, the buckle baffle 346 is provided with a clamping groove 347, the grounding seat 344 is provided with a clamping block 344A matched with the clamping groove, and the clamping block 344A is clamped and fixed with the clamping groove 347 when the grounding contact handle is in contact with the grounding movable support. The clamping block and the clamping groove are clamped and fixed, so that the grounding contact handle always maintains the contact state with the grounding movable support, thereby improving the stability during grounding.

[0057] The buckle baffle 346 includes a sealing cover plate 346A and a clamping plate 346B. The sealing cover plate 346A is fixed to the outer end surface of the sealing mounting seat 341 and seals the sliding hole. A through hole is formed in the center of the sealing cover plate 346A for the sliding rod 342 to pass through. The outer end surface of the sealing cover plate 346A is provided with a circular recess 347A coaxially arranged with the through hole. The clamping plate 346B is fixed to the outer end surface of the sealing cover plate 346A and seals the circular recess 347A. The clamping plate 346B is provided with a rectangular clamping hole 347B communicating with the circular recess 347A. The circular recess 347A and the rectangular clamping hole 347B form the clamping groove 347. The clamping block 344A of the grounding seat is a rectangular protrusion matched with the rectangular clamping hole. By inserting the clamping block into the rectangular clamping hole and accommodating it in the circular recess, rotating the grounding seat, and rotating the clamping block by 90°, the clamping block can be clamped in the circular recess, which is convenient to use.

[0058] As shown in Figure 10 The grounding contact handle 343 is arranged in the axial sliding mode along the sliding rod 342. The grounding contact handle 343 is provided with a contact handle spring 349 between the sliding rod 342. The sliding rod 342 is provided with a blind hole 342A at one end close to the grounding contact handle. The end of the grounding contact handle 343 is inserted into the blind hole. The side wall of the sliding rod 343 is provided with a limiting sliding groove 342B communicating with the blind hole 342A. A limiting rod 342C is slidingly arranged in the limiting sliding groove. The end of the grounding contact handle 343 is fixed to the limiting rod 342C. During grounding, the grounding contact handle 343 is tightly contacted with the grounding movable support 322 by the pressing of the contact handle spring 349, thereby preventing disconnection.

[0059] Working principle: during use, the high-voltage line of the power frequency insulation test transformer is connected to the outgoing terminal of the outgoing sleeve 11. The three-phase conductors of the three-phase insulator 22 are connected to the three-phase bus of the GIS. SF6 gas is filled into the gas filling holes on the outer wall of the bent pipe branch bus 12, the straight pipe branch bus 13, and the shell 2, so that the sleeve branch and the switch assembly form two insulation gas chambers to prevent electric leakage.

[0060] During the test, the pressing handle 345 of two isolation grounding switch assemblies 3 is pressed, so that the two isolation grounding switch assemblies 3 are in the state of grounding switch closing and isolation switch opening. Then, the rotating handle 335 of the third isolation grounding switch assembly 3 is rotated, so that the third isolation grounding switch assembly 3 is in the state of isolation switch closing and grounding switch opening. Thus, the power frequency withstand voltage test of the GIS bus of the phase can be performed. Then, the same method is used to perform the power frequency withstand voltage test of the other two phases. The SF6 gas in the sleeve branch and the switch assembly does not need to be recovered and vacuumized, and the equipment docking and gas filling operation does not need to be repeated. At the same time, the other two phases can be safely grounded, and the test efficiency is greatly improved.

[0061] Of course, the above description is also not limited to the above examples, the technical features not described in the utility model can be realized by or using the prior art, which will not be repeated here; the above embodiments and drawings are only used to illustrate the technical scheme of the utility model and are not a limitation on the utility model, the utility model has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that the changes, modifications, additions or replacements made by those skilled in the art within the essential scope of the utility model do not deviate from the purpose of the utility model, and should also belong to the protection scope of the claims of the utility model.

Claims

1. A high-voltage three-phase gas-insulated metal-enclosed isolating grounding switchgear, comprising bushing branches (1) and switch assembly, characterized in that: The switch assembly includes a housing (2), and a straight conductor (4), a delta conductor (5), and three isolation grounding switch assemblies (3) located inside the housing (2). The housing (2) is provided with a single-phase insulator (21) and a three-phase insulator (22). One end of the straight conductor (4) is connected to the single-phase conductor of the single-phase insulator (21), and the other end of the straight conductor (4) is connected to the delta conductor (5). One end of each of the three isolation grounding switch assemblies (3) is connected to the three-phase conductor of the three-phase insulator (22), and the other end of each of the three isolation grounding switch assemblies is connected to the delta conductor (5). The bushing branch (1) includes an outgoing bushing (11), a bent branch busbar (12) and a straight branch busbar (13) connected in sequence, and the straight branch busbar is connected to the single-phase insulator (21).

2. The high-voltage three-phase gas-insulated metal-enclosed isolating grounding switchgear according to claim 1, characterized in that: The straight conductor (4) includes a transition conductor (41) and a shell conductor (42). One end of the transition conductor (41) is connected to the single-phase insulator (21), and the other end of the shell conductor (42) is connected to the transition conductor (41). A conductor shield (43) is screwed to the end of the shell conductor (42) away from the transition conductor. A first screw hole (51) is provided in the middle of the triangular conductor (5), and the first screw hole is connected to the side wall of the shell conductor by bolts.

3. The high-voltage three-phase gas-insulated metal-enclosed isolating grounding switchgear according to claim 1, characterized in that: The isolating grounding switch assembly (3) includes a stationary side assembly (31), an isolating grounding moving side assembly (32), an isolating switch operating mechanism (33), and a grounding switch (34).

4. A high-voltage three-phase gas-insulated metal-enclosed isolating grounding switchgear according to claim 3, characterized in that: The stationary component (31) includes a stationary contact seat (311) and a conductive spring (312). The three corners of the triangular conductor (5) are provided with second screw holes (52). One end of the stationary contact seat (311) is screwed to the second screw hole (52), and the other end of the stationary contact seat is provided with a contact insertion hole (314). The conductive spring (312) is fixed in the contact insertion hole.

5. A high-voltage three-phase gas-insulated metal-enclosed isolating grounding switchgear according to claim 4, characterized in that: The isolation grounding moving side assembly (32) includes an isolation moving contact seat (321) and a grounding moving support seat (322). One end of the grounding moving support seat (322) is connected to the conductor of the three-phase insulator (22), and the other end of the grounding moving support seat (322) is connected to the isolation moving contact seat (321). The isolation moving contact seat, the grounding moving support seat and the stationary contact seat (311) are coaxial. The isolation moving contact seat (321) is provided with a moving contact (323) that moves along the axial direction.

6. A high-voltage one-to-three-phase gas-insulated metal-enclosed isolating grounding switchgear according to claim 5, characterized in that: The disconnect switch operating mechanism (33) includes a gear shaft (331) rotatably mounted on the disconnect moving contact seat (321). The gear on the outer wall of the gear shaft (331) meshes with a rack fixed on the moving contact (323). A rotating shaft (332) coaxial with the gear shaft (331) is rotatably supported on the housing (2). One end of the rotating shaft (332) is connected to the gear shaft (331) through an insulating rod (333), and the other end of the rotating shaft is fixed with a rotating handle (335).

7. A high-voltage three-phase gas-insulated metal-enclosed isolating grounding switchgear according to claim 5, characterized in that: The grounding switch (34) includes a sealed mounting base (341) fixed to the housing (2). A sliding rod (342) is slidably mounted on the sealed mounting base. The sliding direction of the sliding rod is perpendicular to the axial direction of the grounding support (322). One end of the sliding rod (342) is provided with a grounding contact handle (343) that contacts the grounding support. The other end of the sliding rod is provided with a grounding seat (344). The end of the grounding seat (344) away from the sliding rod (342) is provided with a pressing handle (345).

8. A high-voltage three-phase gas-insulated metal-enclosed isolating grounding switchgear according to claim 7, characterized in that: The sealing mounting base (341) is fixedly connected to a snap-on baffle (346) at one end near the grounding base (344). The snap-on baffle has a snap-on groove (347). The grounding base (344) has a snap-on block (344A) that matches the snap-on groove. When the grounding contact handle (343) contacts the grounding moving support (322), the snap-on block (344A) snaps into the snap-on groove (347) and fixes it in place.

9. A high-voltage one-to-three-phase gas-insulated metal-enclosed isolating grounding switchgear according to claim 8, characterized in that: The grounding contact handle (343) is slidably arranged along the slide rod (342) axially, and a contact handle spring (349) is provided between the grounding contact handle (343) and the slide rod (342).

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