Embedded-pole HV electrical apparatus combination switchgear

Abstract

A five-prevention interlocking pole type high-voltage switchgear includes a pole bracket, embedded poles, and spring and earthing isolated switch operating mechanisms; every three poles are arranged in a row on the bracket, the spring operating mechanism is joined with the switch operating mechanism through the chamber door interlocking piece and mechanism interlocking piece; the chamber interlocking piece, mechanism interlocking piece and door lock plate are joined, the door lock plate is opposite the opening semi-axis pinch plate in the spring operating mechanism and the door lock plate is set with a door lock pin. Chamber interlocking piece movement is used to open or close the switch operating mechanism crank operation hole and corresponds to the start of close brake operation and limit brake of opening pinch plate in the spring operating mechanism and the limiting and opening of the opening semi-axis and cable chamber door in the spring operating mechanism.

Claims

1. An Embedded-Pole High-Voltage Electrical Apparatus Combination Switchgear comprising: a pole bracket; a plurality of embedded poles; a spring operating mechanism; and an earthing isolated switch operating mechanism, wherein: a screw rod and an insulated rod of the embedded poles extend out of a seal base and lead out an upper pole and a lower pole, respectively; a vacuum interrupter is provided within the embedded pole; three embedded poles are arranged in a row on the pole bracket that is shaped in a triangular column framework; a seal flange is provided at a hole of the pole bracket on a first side of the pole bracket where the embedded pole is fixed, the first side of the pole bracket has an embedded triangular notch in which the spring operating mechanism and the earthing isolated switch operating mechanism are provided; an output shaft of the earthing isolated switch operating mechanism is connected with the screw rod corresponding to the embedded pole; a mounting base plate of the spring operating mechanism is provided with an operating shaft, with a plurality of symmetrical crank arms which are connected a plurality of ear bases at both sides, each ear base is provided with an ear slide opening; the insulated rod of the embedded pole extends out of a limit hole formed between the symmetrical crank arm and a shaft pin; the earthing isolated switch operating mechanism is provided in the triangular notch of pole bracket through the mounting base plate of the spring operating mechanism, the earthing isolated switch operating mechanism is located in an upper part of the mounting base plate of the spring operating mechanism which is connected as one piece with the earthing isolated switch operating mechanism through a chamber door interlocking piece a mechanism and interlocking piece piece; a plate slide opening is provided at a joint between the chamber door interlocking piece, the spring operating mechanism and the earthing isolated switch operating mechanism; a pull-up tension spring is provided at an inner side of a tension spring pin of the chamber door interlocking piece; a first end of the chamber door interlocking piece is located at an operating hole of a crank in the earthing isolated switch operating mechanism while a second end of the chamber door interlocking piece is located at a closing semi-axis pinch plate in the spring operating mechanism; a rotary disc interlocking piece is provided at an opening semi-axis pinch plate in the spring operating mechanism with a raised rim part offsetting the chamber door interlocking piece; and a raised knob is provided in the rim of rotary disc interlocking piece, an upward movement is driven by the chamber door interlocking piece offsetting the raised rim part of the rotary disc interlocking piece.

2. The Embedded-Pole High-Voltage Electrical Apparatus Combination Switchgear according to claim 1, further comprising: a crank operation hole end of the chamber door interlocking piece is joined as one entity with a first end of the mechanism interlocking piece, a second end of the mechanism interlocking piece is connected with one end of a door lock plate; and a first end of the door lock plate is connected with the pole bracket through a symmetrically provided guide pin and a compression spring is provided at the joint, a second end of the door lock plate is opposed to the opening semi-axis pinch plate in the spring operating mechanism.

3. The Embedded-Pole High-Voltage Electrical Apparatus Combination Switchgear according to claim 2, further comprising: a door lock pin which extends out of a bottom of the pole bracket is provided between the guide pins of the door lock plate.

4. The Embedded-Pole High-Voltage Electrical Apparatus Combination Switchgear according to claim 1, further comprising: an upper chamber and a lower chamber of the embedded pole are staggered in varying length; a static and dynamic contact assembly within the upper chamber and the lower chamber is connected via a conductive base; the vacuum interrupter is provided in the lower chamber of embedded pole; the upper leading pole of embedded pole vertically leads out the embedded pole and the lower leading pole horizontally leads out the embedded pole by 90 bending, in which the embedded pole is F-shaped.

5. The Embedded-Pole High-Voltage Electrical Apparatus Combination Switchgear according to claim 4, further comprising: an earthing bar connection nut is provided at a top of the seal base of the embedded pole.

6. The Embedded-Pole High-Voltage Electrical Apparatus Combination Switchgear according to claim 1, further comprising: a position switch is provided at an upper part of the earthing isolated switch operating mechanism; a wire from the position switch is connected with an auxiliary switch through a hub mounted on the pole bracket, an auxiliary switch is provided in the spring operating mechanism through an opening of the spring operating mechanism; a motor, a closing electromagnet and an opening electromagnet of the spring operating mechanism are connected with the auxiliary switch through a circuit; the closing electromagnet and the opening electromagnet are opposed to the closing semi-axis, the opening semi-axis drive end pinch plate of the spring operating mechanism, respectively; a closing/opening knob and signs are provided in the spring operating mechanism, the closing/opening knob are provided on a closing brake swing rod and an opening swing rod, respectively; a closing spring, an energy storage gear, an energy storage cam, a connecting rod assembly and a closing/breaking pawl are provided between a clamping plate and the mounting base plate; and an energy storage shaft of the energy storage gear at one end of the clamping plate extends out of an outer edge of the clamping plate.

7. The Embedded-Pole High-Voltage Electrical Apparatus Combination Switchgear according to claim 1, wherein: the earthing isolated switch operating mechanism is a three-position locking isolated mechanism; a transition shaft gear and an output shaft gear, and a position plate assembly and connecting nut plate assembly are provided between a plurality of mounting plates in the three-position locking isolated mechanism; an unlocking shaft in the position plate assembly is connected with an unlocking lever of an unlocking assembly at an outer edge of the mounting plate; a return spring and limit a screw column are provided at a joint; the unlocking lever, an unlocking piece is sequentially connected with a guide rod and an unlocking plate through a guide shell; the unlocking lever, unlocking piece in the unlocking assembly offsets a side roller of limit rod in the nut plate assembly; a plate structure in the nut plate assembly moves between a plurality of clamping plates through the screw rod and the guide rod and also drives an unlocking pin in the nut plate assembly and a position plate location hole in the position plate assembly for fit-locking or unlocking; and a hook end of the unlocking piece passes through the crank limit slot which is provided at one output shaft in the guide shell.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a back view of the invention which omits the structures including the crank, unlocking lever, unlocking piece and closing electromagnet.

(2) FIG. 2 is a back view of the structures of FIG. 1.

(3) FIG. 3 is an exploded view of a portion of the invention which shows the pole bracket, the embedded pole and the seal flange.

(4) FIG. 4 is a back view of the structures of FIG. 1 which omits the structures such as the door lock plate and the door lock pin.

(5) FIG. 5 is an exploded view of a portion of the invention which includes the spring operating mechanism and the earthing isolated switch operating mechanism.

(6) FIG. 6 is the structures of FIG. 5 being assembled in which the crank is provided.

(7) FIG. 7 is a left view of a portion of the structures of FIG. 6.

(8) The numbers indicated in the above figures denote: 1. Pole bracket, 2. Embedded pole, 201. Seal base, 3. Spring operating mechanism, 301. Mounting base plate, 302. Crank arm, 303. Operating shaft, 304. Closing electromagnet, 305. Opening electromagnet, 306. Closing electromagnet, 4. Earthing isolated switch operating mechanism. 401. Crank, 402. Unlocking shaft, 403. Unlocking lever, 404. Unlocking piece, 405. Guide shell, 406. Guide rod, 407. Unlocking plate, 408. Limit rod, 5. Chamber door interlocking piece, 501. Tension spring pin, 6. Mechanism interlocking piece, 7. Seal flange, 8. Motor, 9. Auxiliary switch, 10. Position switch, 11. Earthing bar connection nut, 12. Rotary disc interlocking piece, 13. Door lock plate, 14. Door lock pin.

DESCRIPTION OF THE EMBODIMENT

(9) Now the invention is further disclosed with reference to the drawings. As shown in FIG. 1 through FIG. 7, such high-voltage electrical switchgear comprises the pole bracket 1, the embedded pole 2, the spring operating mechanism 3 and the earthing isolated switch operating mechanism 4, the screw rod and insulated rod of the embedded pole extend out of the seal base 201 respectively, an earthing bar connection nut 11 is provided at the top of the seal base of embedded poles, the screw rod and insulated rod lead out the upper pole and the lower pole respectively, a vacuum interrupter is provided in the embedded pole; the upper chamber and the lower chamber of the said embedded pole are staggered in varying length, the static and dynamic contact assembly within the said upper chamber and the lower chamber is connected via the conductive base, a vacuum interrupter is provided in the lower chamber of embedded pole, the upper pole of embedded pole vertically leads out the embedded pole and the lower pole horizontally leads out the embedded pole by 90 bending, in which the embedded pole is gun-shaped. Every three of the embedded poles is arranged in a row on the pole bracket which is shaped in triangular column framework, a seal flange 7 is provided at the hole of pole bracket where the base of embedded pole is fixed; the pole bracket at this side has an embedded triangular notch in which the spring operating mechanism and the earthing isolated switch operating mechanism are provided, the output shaft of the earthing isolated switch operating mechanism is connected with the screw rod corresponding to the embedded pole. The mounting base plate 301 of the spring operating mechanism is provided with an operating shaft 303 with the symmetrical crank arms 302 which are connected to the ear bases at both sides, each ear base is provided with an ear slide opening, the insulated rod of embedded pole extends out of the limit hole formed between the symmetrical crank arm and the shaft pin; the earthing isolated switch operating mechanism is provided in the triangular notch of pole bracket through the mounting base plate of the spring operating mechanism, the earthing isolated switch operating mechanism is located in the upper part of the mounting base plate of the spring operating mechanism which is connected as one piece with the earthing isolated switch operating mechanism through the chamber door interlocking piece 5 and the mechanism interlocking piece 6. A plate slide opening is provided at the joint between the chamber door interlocking piece, the spring operating mechanism and the earthing isolated switch operating mechanism, a pull-up tension spring is provided at the inner side of the tension spring pin 501 of the chamber door interlocking piece, one end of the chamber door interlocking piece is located at the operating hole of the crank 401 in the earthing isolated switch operating mechanism while its other end is located at the closing semi-axis pinch plate in the spring operating mechanism; a rotary disc interlocking piece 12 is provided at the opening semi-axis pinch plate in the spring operating mechanism with the raised rim part of its one end offsetting the chamber door interlocking piece, a raised knob is provided in the rim of rotary disc interlocking piece.

(10) In the said structure, the chamber door interlocking piece drives the upward movement to block the crank operation hole of the earthing isolated switch operating mechanism by offsetting the rim raised part of the rotary disc interlocking piece, so that the crank of the earthing isolated switch operating mechanism cannot be inserted; the other end of the chamber door interlocking piece fits into the closing semi-axis pinch plate which leaves the spring operating mechanism, enabling the closing of the spring operating mechanism. The rim raised part of the rotary disc interlocking piece is separated from the chamber door interlocking piece by turning the rotary disc interlocking piece via the knob on the rotary disc interlocking piece, the chamber door interlocking piece returns through the tension spring, the crank operation hole of the earthing isolated switch operating mechanism is opened, the other end of the chamber door interlocking piece fits into the closing semi-axis pinch plate which blocks the spring operating mechanism, disabling the closing of the spring operating mechanism.

(11) Meanwhile, the crank operation hole end of the said chamber door interlocking piece is joined as one entity with one end of the mechanism interlocking piece, the other end of the mechanism interlocking piece is connected with one end of the door lock plate 13, the bottom of the door lock plate is connected with the pole bracket through the symmetrically provided guide pin and a compression spring is provided at the joint, the other end of the door lock plate is opposed to the opening semi-axis pinch plate in the spring operating mechanism; a door lock pin 14 which extends out of the bottom of pole bracket is provided between the guide pins of the said door lock plate. By this means, when the earthing isolated switch operating mechanism is at the earthing position, the chamber door interlocking piece moves upward to leave the door lock plate; when the breaker mechanism is at the closing position, the rotary disc interlocking piece is also at this position; in that situation, the door lock plate as driven by the mechanism interlocking plate will drive the door lock pin to move upward, so that the cable chamber door can be opened; and when the door lock plate moves upward, the door lock plate will block the opening semi-axis pinch plate of the spring operating mechanism, disabling the opening of the spring operating mechanism; in the said structure, the door lock drives the returning through the tension spring and the door lock plate. That is to say when the spring operating mechanism of such high-voltage electrical switchgear is at the closing position, the earthing isolated switch operating mechanism is not allowed to operate; when the earthing isolated switch operating mechanism is at the isolated closing position or the earthing closing position, the spring operating mechanism can be closed/opened; when the earthing isolated switch operating mechanism is at the earthing position and the spring operating mechanism is at the closing position, the cable chamber door can be opened; after opening the cable chamber door, the spring operating mechanism cannot be opened; during the switching process of position of the earthing isolated switch operating mechanism, the spring operating mechanism doesn't allow for the five-prevention interlocking of the spring operating mechanism.

(12) In addition, a position switch 10 is provided at the upper part of the earthing isolated switch operating mechanism, the wire from the position switch is connected with the auxiliary switch 9 through the hub mounted on the pole bracket, the auxiliary switch is provided in the spring operating mechanism through the opening of the spring operating mechanism, the motor 8, the closing electromagnet 304 and the opening electromagnet 305 of the spring operating mechanism are connected with the auxiliary switch through the circuit; the closing electromagnet and the opening electromagnet are opposed to the closing semi-axis, opening semi-axis drive end pinch plate of the spring operating mechanism respectively, the closing/opening knob and signs are provided in the spring operating mechanism, the closing/opening knob are provided on the closing brake swing rod and the opening swing rod respectively, the closing spring 306, the energy storage gear, the energy storage cam, the connecting rod assembly and the closing/breaking pawl are provided between the clamping plate and the mounting base plate, the energy storage shaft of the energy storage gear at one end of the clamping plate extends out of the outer edge of the clamping plate. The said earthing isolated switch operating mechanism is a three-position locking isolated mechanism, a transition shaft gear and an output shaft gear, and the position plate assembly and connecting nut plate assembly are provided between the mounting plates in the three-position locking isolated mechanism, the unlocking shaft 402 in the position plate assembly is connected with the unlocking lever 403 of the unlocking assembly at the outer edge of mounting plate and the return spring and limit screw column are provided at the joint, the unlocking lever, unlocking piece 404 is sequentially connected with the guide rod 406 and the unlocking plate 407 through the guide shell 405, the unlocking lever, unlocking piece in the unlocking assembly offsets the side roller of limit rod in the nut plate assembly, the plate structure in the nut plate assembly moves between the clamping plates through the screw rod and guide rod and also drives the unlocking pin in the nut plate assembly and the position plate location hole in the position plate assembly for fit-locking or unlocking, and the hook end of the unlocking piece passes through the crank limit slot which is provided at one output shaft in the guide shell.

(13) While in use, such high-voltage electrical switchgear is installed in the corresponding high-voltage switchgear cabinet, the upper pole of the embedded pole is connected with the bus and the lower pole is connected with the outgoing cable, the earthing bus bar nut is joined with the earthing bus bar, a panel is provided on the outer slope of the pole bracket, and the panel window openings correspond to the manual energy storage hole, the crank insertion hole, the opening/closing knob and signs. The manual energy storage shaft is operated if the manual energy storage is required; the crank is inserted to the earthing isolated switch operating mechanism and then the crank is swung for the switching of position if the manual three-position isolated operation is required; the opening/closing knob is just turned if the electric opening/closing is required.

(14) In conclusion, three embedded poles and an integrated operating interlocking mechanism of the invention are mounted at the front and rear part of the pole bracket, specifically as: three embedded poles are arranged in parallel; the spring operating mechanism and the earthing isolated switch operating mechanism are combined as an integrated operating interlocking mechanism which is arranged in the upper and lower section with interlocking control; the pole bracket is an integrated bracket formed by welding profile material. This invention is an integrated combination unit module in the high-voltage switches which has vacuum breakers or vacuum load switches with the function of three-position switch and operating mechanism; the overall dimensions are exactly the same under the status of the said function, the switching of the pole combination sets of different functions can be achieved through various mechanisms. Specifically, it can be divided into five combination sets: load switches+three-position switchgear, breaker+three-position switchgear, isolated switchgear, breaker+isolated switchgear, and load switches+isolated switchgear and with a complete five-prevention interlocking function, so that the switchgear cabinet doesn't need any interlocking. Meanwhile, the poles are entirely sealed and three positions are air-insulated to achieve the purpose of environmental protection and safety. It is applicable to the solid-insulated switchgear, gas insulated switchgear, and other composite insulated switchgear or similar products, which can be used as a combination unit module.