CN115000868A

CN115000868A - Environment-friendly gas insulation switch cabinet gas tank

Info

Publication number: CN115000868A
Application number: CN202210847358.2A
Authority: CN
Inventors: 曹玉生; 詹永钦
Original assignee: Shanghai Bapei Switch Equipment Co ltd
Current assignee: Shanghai Bapei Switch Equipment Co ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-09-02

Abstract

The invention discloses an environment-friendly gas-insulated switch cabinet gas tank, which comprises: three groups of polar columns are arranged in the gas box and correspond to A, B, C three phases, and a three-phase outgoing line sleeve is connected to an outgoing line end at the bottom of each polar column; the top of the pole is connected with a circuit breaker mechanism outside the gas tank through a corrugated pipe; the line outlet end of the pole is connected with a support, the support is connected with a guide rod, the guide rod is provided with a sliding guide sleeve, and two ends of the sliding guide sleeve are provided with a second watchband contact grease and a third watchband contact grease; one end of the transmission shaft is rotatably connected to the inner wall of the air box, the other end of the transmission shaft is connected with an isolation mechanism outside the air box, and a crank arm is arranged on the transmission shaft and connected with the sliding guide sleeve; the gas tank top is equipped with the three-phase wire casing pipe, the intraductal contact that matches with the slip uide bushing that is equipped with of cover, the gas tank lateral part is equipped with ground bus bar and the ground contact that matches with the slip uide bushing.

Description

Environment-friendly gas insulation switch cabinet gas tank

Technical Field

The invention relates to an environment-friendly gas-insulated switch cabinet gas box, and belongs to the technical field of high-voltage switch cabinets.

Background

The gas insulation switch cabinet in the current market adopts sulfur hexafluoride, nitrogen and dry air as insulation, among three gases, the sulfur hexafluoride gas insulation capability is strongest, the sulfur hexafluoride gas insulation capability occupies the output of a large number of switch cabinets in the market, the environmental climate temperature rise can be caused to generate greenhouse effect by using a large amount of sulfur hexafluoride for a long time, and the nitrogen or dry air adopted as the insulation switch cabinet can only meet the design of a switch cabinet product with the voltage of 12 kilovolts at present or can not meet the insulation design of the switch cabinet product with the voltage of 40.5 kilovolts at very high rated pressure. At present, three-station switches of a switch cabinet in the whole market are designed by adopting a structure of rotating and directly rotating a disconnecting link, and have the problems of high manufacturing cost, limited insulation distance, non-uniform electric field, high temperature, large volume and the like. The not enough problem of cubical switchboard in this product design structure solution existing market. The three stations adopt the rotatory fracture insulation distance increase of design that slides, insulating ability obtains promoting, three stations sliding structure bodies all are the cylinder shape, and the electric field is more even. When the three-station switch-on state is realized, the current is from top to bottom when the three-station switch-on state is used as a feeder cabinet, the current is from bottom to top when the three-station switch-on state is used as an incoming cabinet, and the heat of the heating body is radiated and flows out from bottom to top, so that the temperature is favorably reduced. The three-position switch structure can be realized to have the advantage of a two-position switch by removing the grounding position. When the width of the product is not changed, any one of the following three gases (sulfur hexafluoride, nitrogen and dry air) can be filled into the structure, and the product design of the 12-40.5 kV switch cabinet can be realized.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides an environment-friendly gas-insulated switch cabinet gas tank.

An environmental protection gas insulated switchgear gas tank, includes:

the air tank is internally provided with three groups of poles corresponding to A, B, C three phases, and a three-phase outlet sleeve is connected to a bottom outlet end of each pole; the top of the pole is connected with a circuit breaker mechanism outside the gas tank through a corrugated pipe;

the support is connected with a lead-out end of the pole, the support is connected with a guide rod, the guide rod is provided with a sliding guide sleeve, and two ends of the sliding guide sleeve are provided with a second watchband contact grease and a third watchband contact grease;

one end of the transmission shaft is rotatably connected to the inner wall of the air box, the other end of the transmission shaft is connected with an isolation mechanism outside the air box, and a crank arm is arranged on the transmission shaft and connected with the sliding guide sleeve; the gas tank top is equipped with the three-phase wire casing pipe, the intraductal contact that matches with the slip uide bushing that is equipped with of cover, the gas tank lateral part is equipped with ground bus bar and the ground contact that matches with the slip uide bushing.

Furthermore, the middle part of the pole is provided with a conductive clamp, and the side part of the conductive clamp is connected with the support through flexible connection.

Further, the conductive clamp is provided with an insulating pull rod, the insulating pull rod is connected with the corrugated pipe, and the corrugated pipe and the air box are sealed through a sealing ring.

Furthermore, the bottom of the pole is connected with a first feeder, a second feeder and a third feeder through a second cushion block, a first cushion block is arranged between the second feeder and the third feeder, and the first feeder, the second feeder and the third feeder are connected with a three-phase outgoing sleeve.

Furthermore, the guide rod is connected with the support through a guide sleeve, and a first watchband contact grease is arranged between the guide rod and the guide sleeve.

Furthermore, an explosion-proof pressure relief valve device is arranged at the lower part of the rear plate of the air box.

Furthermore, the sliding guide sleeve is connected with the guide rod through a fixing screw.

Furthermore, one end of the transmission shaft is connected with the air box through a first bearing seat, and the other end of the transmission shaft is connected with a contact part of the air box through a second bearing seat.

Compared with the prior art, the invention has the following beneficial effects: compared with the conventional product, the product of the invention has higher safe insulation distance, can meet the insulation requirement only by filling normal pressure gas, really achieves environmental protection and no pollution, has low product cost, and is a future development trend of the environmental protection switch cabinet. .

Drawings

FIG. 1 is a sectional view showing a closing state of the present invention;

FIG. 2 is a front view of the closing state of the present invention;

FIG. 3 is a schematic diagram of the grounding state of the present invention;

FIG. 4 is a schematic view of a second embodiment of the present invention;

in the figure: 1. a circuit breaker mechanism; 2. an isolation mechanism; 3. a gas tank; 4. an outgoing line sleeve; 5. a first feeder line; 6. a second feeder line; 7. a feeder line III; 8. a first cushion block; 9. a second cushion block; 10. a pole column; 11. a support; 12. a guide sleeve; 13. the watchband contacts fat one; 14. a guide bar; 15. a ground contact; 16. a ground bus; 17. contacting the watchband with grease; 18. a sliding guide sleeve; 19. contacting the watchband with grease; 20. a sleeve; 21. a crank arm; 22. a drive shaft; 23. fixing screws; 24. a conductive clip; 25. soft connection; 26. an insulating pull rod; 27. a bellows; 28. a first bearing seat; 29. a second bearing seat; 30. and a ground terminal.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

Example one

As shown in fig. 1-4, an environment-friendly gas-insulated switchgear gas cabinet is disclosed, comprising:

the air tank 3 is internally provided with a three-phase pole which is divided into a far, middle and near corresponding A, B, C three-phase layout, and the lower outlet end at the bottom of the pole is connected with a three-phase outlet sleeve; the top of the pole is connected with the breaker mechanism 1 through a corrugated pipe, the bottom of the pole 10 is connected with a first feeder 5, a second feeder 6 and a third feeder 7 through a second cushion block 9, a first cushion block 8 is arranged between the second feeder 6 and the third feeder 7, and the first feeder 5, the second feeder 6 and the third feeder 7 are connected with a three-phase outlet sleeve; a conductive clamp 24 is arranged inside the pole 10, the conductive clamp 24 is provided with an insulating pull rod 26, the insulating pull rod 26 is connected with a corrugated pipe 27, and the corrugated pipe 27 and the air box 3 are sealed through a sealing ring;

the side part of the conductive clamp 24 is connected with the support 11 through a flexible connection 25, the other end of the conductive clamp is movably connected with a guide sleeve 12, the guide sleeve 12 is connected with a guide rod 14, a watchband contact grease I13 is arranged between the guide sleeve 12 and the guide rod 14, and the guide rod 14 is connected with a sliding guide sleeve 18;

one end of the transmission shaft 22 is rotatably connected to the inner wall of the air box 3, the other end of the transmission shaft 22 is used for being connected with the circuit breaker mechanism 1 outside the air box 3, a crank arm 21 is arranged on the transmission shaft 22, and the crank arm 21 is connected with the sliding guide sleeve 18; the top of the air box 3 is provided with a sleeve 20 matched with the sliding guide sleeve 18, the side part of the air box 3 is provided with a grounding busbar 16 matched with the sliding guide sleeve 18, and the grounding busbar 16 is connected with a grounding contact 15;

in this embodiment, the present invention has a sliding type rotating three-position switch structure, the circuit breaker mechanism 1 drives the rotating shaft 22 to rotate, the crank arm 21 drives the sliding guide sleeve 18 to move to the position between the ground busbar 16 and the sleeve 20, which is in a switching-off state, and when the sliding guide sleeve 18 moves to the position of the ground busbar 16 and is connected with the contact of the ground busbar 16, the sliding guide sleeve is in a grounding state; a closing state when the sliding guide sleeve 18 moves to a position where it is connected to the sleeve 20 and is connected to a contact inside the sleeve 20;

a second strap contact grease 17 and a third strap contact grease 19 are provided at each end of the sliding guide sleeve 18, wherein the sliding guide sleeve 18 is connected to the guide bar 14 by a fixing screw 23.

One end of the transmission shaft 22 is connected with the air box 3 through a first bearing seat 28, and the other end of the transmission shaft is connected with the contact part of the air box 3 through a second bearing seat 29.

The isolation mechanism 2 is connected with a transmission shaft 22, the transmission shaft 22 is connected with a sliding guide sleeve 18 through a crank arm 21, the sliding guide sleeve 18 is sleeved on the guide rod 14, and the upper end and the lower end of the sliding guide sleeve 18 are provided with a watchband contact finger 19 or a spring contact finger; when the isolation mechanism 2 is in the opening state, the crank arm 21 is in the opening state (232.5 degrees), when the isolation mechanism 2 operates to the closing state, the crank arm 21 rotates to 180 degrees in the reverse direction, the sliding guide sleeve 18 is connected with the sleeve 20 to be conducted to form a loop, and if the isolation mechanism 2 operates to the grounding state, the crank arm 21 rotates to 285 degrees in the clockwise direction, and the sliding guide sleeve 18 is connected with the grounding contact 15 to be conducted to form a grounding loop.

The circuit breaker mechanism 1 is connected with a movable end of a pole 10 (a vacuum arc-extinguishing chamber) through a connecting corrugated pipe 27 and an insulating pull rod 26;

when current flows in from the insulating sleeve 4, the current flows into the pole 10 (the static end of the vacuum arc-extinguishing chamber) through the feeder line I5, the feeder line II 6, the feeder line III 7, the cushion block I8 and the cushion block II 9;

the breaker mechanism 1 presses down the operation switch-on button, breaker mechanism 1 transmission shaft 22 promotes bellows 27, insulating pull rod 26 moves down, when utmost point post 10 (vacuum interrupter) moves the end and contacts quiet end, the electric current flows to moving the end from quiet end, utmost point post 10 (vacuum interrupter) moves the end and is connected to electrically conductive clamp 24, flexible coupling 25, support 11 is connected to uide bushing 12, uide bushing 12 is equipped with the watchband and touches fat 13 (the spring touches the fat), the watchband touches fat 13 (the spring touches the fat) and contacts with guide bar 14. The guide bar 14 is connected to the sliding guide sleeve 18 with a contact grease (spring contact grease) contact. The sliding guide sleeve 18 and the sleeve 20 are connected to form a current output loop, and the sleeve 20 is connected with the adjacent switch cabinet sleeve through a bus.

Example two

As shown in fig. 4, the difference between the second embodiment and the first embodiment is that the installation position of the pole 10 is adjusted from the vertical position in fig. 1 to the horizontal position in the state of fig. 4, and the rest of the structure and the working principle are consistent with those of the first embodiment.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an environmental protection gas insulation cubical switchboard gas tank, characterized by includes:

the air tank (3) is internally provided with three groups of poles (10) corresponding to A, B, C three phases, and a three-phase outlet sleeve is connected to a bottom outlet end of each pole (10); the top of the pole (10) is connected with a circuit breaker mechanism (1) outside the gas tank (3) through a corrugated pipe (27);

the lead-out end of the pole (10) is connected with the support (11), the support (11) is connected with a guide rod (14), the guide rod (14) is provided with a sliding guide sleeve (18), and two ends of the sliding guide sleeve (18) are provided with a second watchband contact grease and a third watchband contact grease;

one end of the transmission shaft (22) is rotatably connected to the inner wall of the air box (3), the other end of the transmission shaft (22) is connected with the isolation mechanism (2) outside the air box (3), a crank arm (21) is arranged on the transmission shaft (22), and the crank arm (21) is connected with the sliding guide sleeve (18); the gas tank (3) top is equipped with three-phase wire outgoing sleeve pipe (20), be equipped with the contact that matches with slip uide bushing (18) in sleeve pipe (20), gas tank (3) lateral part is equipped with ground bus bar (16) and ground contact (30) with slip uide bushing (18) matching.

2. The gas tank of the environmental protection gas insulation switch cabinet according to claim 1, wherein the middle part of the pole (10) is provided with a conductive clip (24), and the side part of the conductive clip (24) is connected with the support (11) through a flexible connection (25).

3. The gas tank of the environmental-friendly gas insulated switchgear according to claim 2, wherein the conductive clip (24) is provided with an insulating pull rod (26), the insulating pull rod (26) is connected with a corrugated pipe (27), and the corrugated pipe (27) and the gas tank (3) are sealed by a sealing ring.

4. The gas tank of the environment-friendly gas insulated switchgear according to claim 1, wherein the bottom of the pole (10) is connected with a feeder line I (5), a feeder line II (6) and a feeder line III (7) through a pad block II (9), a pad block I (8) is arranged between the feeder line II (6) and the feeder line III (7), and the feeder line I (5), the feeder line II (6) and the feeder line III (7) are connected with a three-phase outlet bushing.

5. An environmental protection gas-insulated switchgear gas tank according to claim 1, characterized in that the guide bar (14) is connected to the support (11) by a guide sleeve (12), and a strap contact grease (13) is provided between the guide bar (14) and the guide sleeve (12).

6. An environmental protection gas insulated switchgear gas tank according to claim 1, characterized in that the explosion-proof relief valve device is provided under the back plate of the gas tank (3).

7. An environmentally friendly gas insulated switchgear gas cabinet according to claim 1, characterized in that the sliding guide sleeve (18) is connected to the guide bar (14) by means of a set screw (23).

8. The gas tank of the environmentally friendly gas insulated switchgear according to claim 1, wherein one end of the transmission shaft (22) is connected to the gas tank (3) through a first bearing seat (28), and the other end is connected to the contact portion of the gas tank (3) through a second bearing seat (29).