CN217933606U

CN217933606U - Load switch of vacuum arc extinguishing mode

Info

Publication number: CN217933606U
Application number: CN202221974454.5U
Authority: CN
Inventors: 金宁; 戴宁; 张丽; 邢爱国; 周喜章; 刘海辰; 鲁绪乾
Original assignee: Nanjing Kangni Huanwang Switch Equipment Co ltd
Current assignee: Nanjing Kangni Huanwang Switch Equipment Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-11-29
Anticipated expiration: 2032-07-29

Abstract

The utility model relates to a load switch with a vacuum arc extinguishing mode, wherein a rotating rod is installed on the side wall of a branch loop contact; a closing switch is installed on the rotating rod in a butt joint mode; the outer side wall of the vacuum arc extinguishing mechanism is provided with a convex plate; the side wall of the end head of the convex plate is provided with an upper rotating shaft in an access way; the upper rotating shaft is rotatably provided with a rotating block; an arc-shaped groove is formed in the side wall of the rotating block in a penetrating mode; the side wall of the lower end of the rotating block is provided with a lower rotating shaft in a leading-in manner; the lower rotating shaft is provided with a connecting socket in a butt joint way; a vacuum cavity is formed in the sleeve; the left end of the sleeve is provided with a flow guide column; limiting rods are symmetrically arranged on the side wall of the guide column; the limiting rod is clamped in the arc-shaped groove; the outer side wall of the guide column is sleeved with a limiting table; the utility model discloses can provide an arc extinguishing load switch that bearing current is big and safe arc extinguishing performance is good vacuum arc extinguishing mode.

Description

Load switch of vacuum arc extinguishing mode

Technical Field

The utility model belongs to the technical field of electrical equipment is relevant, concretely relates to load switch of vacuum arc extinguishing mode.

Background

At present, the gas insulated load switch has various arc extinguishing modes, typically a rotary arc type, a gas compression type and a metal deionization grid type; the arc-rotating type arc extinguishing mode adopts a strong magnetic field to rotate and stretch an electric arc for arc extinguishing, so that the arc extinguishing has high breaking capacity, but because a coil structure is adopted, the coil is heated and burnt out due to the repeated opening and closing of the switch, and further the breaking failure is caused, the arc flying distance is not easy to control, the ground short circuit is easily caused, the ground distance of an arc extinguishing device needs to be controlled, and the size design of a load switch is increased; the pneumatic arc extinguishing mode adopts an insulating gas blowing arc extinguishing mode, has strong arc extinguishing capability, but has complex structural design, higher cost and large required operation power of a mechanism, and is generally applied to high voltage grade; due to the special pneumatic structure, the moving contact and the static contact are arranged in the cylinder, so that the reduction of the insulation environment in the cylinder is easily caused to influence the breaking performance; the metal deionization grid type arc extinguishing load switch widely adopts a metal deionization grid arc extinguishing device with a bar-shaped supporting structure, and the metal deionization grid type arc extinguishing load switch is widely applied to the switch industry due to simple and reliable structure and low price, but high-temperature gas generated by electric arc heat effect of the structure in the switching-on and switching-off process easily causes deformation of a supporting rod, even drops of an arc extinguishing grid sheet, and influences the switching-on and switching-off performance and service life.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a load switch of vacuum arc extinguishing mode that arc extinguishing load current is big and safe arc extinguishing performance is good.

In order to achieve the above purpose, the utility model provides a following technical scheme: a load switch of vacuum arc extinguishing mode comprises a main loop contact, a branch loop contact, a vacuum arc extinguishing mechanism and a grounding contact; the side wall of the branch loop contact is provided with a rotating rod in a leading-in manner; a switch-on is installed on the rotating rod in a butt joint mode; the outer side wall of the vacuum arc extinguishing mechanism is provided with a convex plate; an upper rotating shaft is arranged on the side wall of the end head of the convex plate in a leading-in manner; the upper rotating shaft is rotatably provided with a rotating block; an arc-shaped groove is formed in the side wall of the rotating block in a penetrating mode; the side wall of the lower end of the rotating block is provided with a lower rotating shaft in a leading-in manner; the lower rotating shaft is provided with a connecting socket in a butt joint mode; the vacuum arc extinguishing mechanism comprises a sleeve; a vacuum cavity is formed in the sleeve; the left end of the sleeve is provided with a flow guide column; limiting rods are symmetrically arranged on the side wall of the flow guide column; the limiting rod is clamped in the arc-shaped groove; the outer side wall of the flow guide column is sleeved with a limiting table; an inner boss is sleeved and mounted at the inner end of the flow guide column; a return spring is sleeved on the flow guide column; a return line is led into the right end of the sleeve; the return spring is positioned between the limiting boss and the inner boss; a sealing ring is sleeved on the flow guide column; the sealing ring extends from the limiting boss to the inner boss; the grounding contact is arranged beside the branch loop contact through a bracket and is grounded through a wire.

As a further improvement of the utility model, the flow guide column with the butt joint is installed with the water conservancy diversion line between the electrical connection seat.

As a further improvement of the present invention, the main circuit contact is connected to the return line.

As a further improvement of the utility model, the main loop contact is sleeved with an electrified bus.

As a further improvement, the branch line is connected with the electricity by sleeving on the branch circuit contact.

As a further improvement, the sleeve, the convex plate and the rotating block are made of plastic materials.

As a further improvement, the main circuit contact, the branch circuit contact, the combined floodgate, the power connection seat, the water conservancy diversion line, the ground contact, the water conservancy diversion post and the return line all adopt the copper product to make and form.

Compared with the prior art, the beneficial effects of the utility model are that: according to the technical scheme, the vacuum arc extinguishing mechanism is provided with the rotating block, the upper rotating shaft, the lower rotating shaft, the limiting rod, the arc-shaped groove and the reset spring, the upper rotating shaft and the lower rotating shaft are matched firstly, when the closing pushes the electric connection seat, the rotating block can rotate, then under the elastic tension of the reset spring, the electric connection seat of the opening can realize automatic reset, and finally under the matching of the limiting rod and the arc-shaped groove, the rotating block can be prevented from being opened in a transition mode, and irreversible damage can be caused to the reset spring; according to the technical scheme, the vacuum arc extinguishing mechanism is arranged between the main loop contact and the branch loop contact of the three-phase load switch, at the moment when the main loop contact of the switch-on and the load is switched off, the switch-on is simultaneously contacted with the contact sockets butted with the main loop contact of the load and the vacuum arc extinguishing mechanism respectively, so that shunt is formed, then the main loop contact of the switch-on and the load is switched off and is independently conducted with the vacuum arc extinguishing mechanism, electric arcs generated by the vacuum arc extinguishing mechanism are completely extinguished, the reliable isolation of the main loop is ensured, the main loop contact of the load switch is prevented from being burnt by residual electric arcs, and further the use fault of the load switch is caused.

Drawings

Fig. 1 is the utility model discloses a whole scene structure schematic diagram that uses among the separating brake process.

Fig. 2 is the schematic diagram of the internal amplification structure of the vacuum arc extinguishing mechanism of the present invention.

In the figure: 1. a main circuit contact; 2. a branch circuit contact; 3. a vacuum arc extinguishing mechanism; 301. a sleeve; 302. a vacuum chamber; 303. a flow guide column; 304. a limiting rod; 305. a limiting table; 306. an inner boss; 307. a return spring; 308. a return line; 309. a seal ring; 4. rotating the rod; 5. closing a switch; 6. a convex plate; 7. an upper rotating shaft; 8. rotating the block; 9. an arc-shaped slot; 10. a lower rotating shaft; 11. an electric connection seat; 12. a diversion line; 13. a ground contact; 14. a power-on bus; 15. the branch line is connected electrically.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 2, the present invention provides a technical solution: a load switch of vacuum arc extinguishing mode comprises a main loop contact 1, a branch loop contact 2, a vacuum arc extinguishing mechanism 3 and a grounding contact 13; the side wall of the branch loop contact 2 is provided with a rotating rod 4; a closing switch 5 is installed on the rotating rod 4 in a butt joint mode; the outer side wall of the vacuum arc extinguishing mechanism 3 is provided with a convex plate 6; the side wall of the end head of the convex plate 6 is provided with an upper rotating shaft 7; a rotating block 8 is rotatably arranged on the upper rotating shaft 7; an arc-shaped groove 9 is formed in the side wall of the rotating block 8 in a penetrating mode; the side wall of the lower end of the rotating block 8 is provided with a lower rotating shaft 10; the lower rotating shaft 10 is provided with a connecting socket 11 in a butt joint mode; the vacuum arc extinguishing mechanism 3 comprises a sleeve 301; a vacuum cavity 302 is formed in the sleeve 301; the left end of the sleeve 301 is provided with a flow guide column 303; limiting rods 304 are symmetrically arranged on the side wall of the guide column 303; the limiting rod 304 is clamped in the arc-shaped groove 9; the outer side wall of the guide column 303 is sleeved with a limiting table 305; an inner boss 306 is sleeved and mounted at the inner end of the flow guide column 303; a return spring 307 is sleeved on the flow guide column 303; a return line 308 is led into the right end of the sleeve 301; the return spring 307 is located between the limit boss 305 and the inner boss 306; a sealing ring 309 is sleeved on the flow guide column 303; the seal ring 309 extends from the stop 305 to the inner boss 306; the grounding contact 13 is arranged beside the branch circuit contact 2 through a bracket and is grounded through a wire; a guide line 12 is installed between the guide column 303 and the electric connection seat 11 in a butt joint mode; main circuit contact 1 is butted together with return line 308; the main loop contact 1 is sleeved with an electrified bus 14; the branch loop contact 2 is sleeved with an electric branch line 15; the sleeve 301, the convex plate 6 and the rotating block 8 are all made of plastic materials; the main loop contact 1, the branch loop contact 2, the closing 5, the electrical connection seat 11, the diversion line 12, the grounding contact 13, the diversion column 303 and the return line 308 are all made of copper materials.

Under the normal power connection condition, the main loop contact 1, the branch loop contact 2 and the switch-on 5 are butted together; when the current is required to be cut off and the brake is switched off, the switch-on 5 is pushed through the insulating part, at the moment when the switch-on 5 is contacted with the electric connection seat 11, current can enter the vacuum cavity through the electric connection seat 11, the guide line 12 and the guide column 303 in sequence for arc extinguishing treatment, residual current can return to the main loop contact 1 through the return line 308, and the switch-on 5 needs to be pushed all the time to be separated from the main loop contact 1 and the electric connection seat 11 until the switch-on 5 is butted with the grounding contact.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A load switch of a vacuum arc extinguishing mode is characterized in that: the arc extinguishing device comprises a main loop contact (1), a branch loop contact (2), a vacuum arc extinguishing mechanism (3) and a grounding contact (13); the side wall of the branch loop contact (2) is provided with a rotating rod (4) in a leading-in manner; a closing part (5) is installed on the rotating rod (4) in a butt joint mode; the outer side wall of the vacuum arc extinguishing mechanism (3) is provided with a convex plate (6); an upper rotating shaft (7) is arranged on the side wall of the end head of the convex plate (6) in a leading-in manner; a rotating block (8) is rotatably arranged on the upper rotating shaft (7); an arc-shaped groove (9) is formed in the side wall of the rotating block (8) in a penetrating mode; the side wall of the lower end of the rotating block (8) is provided with a lower rotating shaft (10) in a leading-in manner; the lower rotating shaft (10) is provided with an electric connection seat (11) in a butt joint manner; the vacuum arc extinguishing mechanism (3) comprises a sleeve (301); a vacuum cavity (302) is formed in the sleeve (301); the left end of the sleeve (301) is provided with a flow guide column (303) in a leading way; limiting rods (304) are symmetrically arranged on the side wall of the flow guide column (303); the limiting rod (304) is clamped in the arc-shaped groove (9); the outer side wall of the flow guide column (303) is sleeved with a limiting table (305); an inner boss (306) is sleeved and mounted at the inner end of the flow guide column (303); a return spring (307) is sleeved on the flow guide column (303); a return line (308) is led into the right end of the sleeve (301); the return spring (307) is positioned between the limit boss (305) and the inner boss (306); a sealing ring (309) is sleeved on the flow guide column (303); the sealing ring (309) extends from the limiting boss (305) to an inner boss (306); the grounding contact (13) is arranged beside the branch circuit contact (2) through a bracket and is grounded through a wire.

2. A load switch of a vacuum quenching type according to claim 1, wherein: and a guide line (12) is installed between the guide column (303) and the electric connection seat (11) in a butt joint manner.

3. A load switch of a vacuum quenching type according to claim 1, wherein: the main circuit contact (1) is butted with the return line (308).

4. A load switch of a vacuum quenching type according to claim 1, wherein: and an electrified bus (14) is sleeved on the main loop contact (1).

5. A load switch of a vacuum quenching type according to claim 1, wherein: and the branch loop contact (2) is sleeved with an electric branch line (15).

6. A load switch of a vacuum quenching type according to claim 1, wherein: the sleeve (301), the convex plate (6) and the rotating block (8) are all made of plastic materials.

7. A load switch of a vacuum quenching type according to claim 1, wherein: the main loop contact (1), the branch loop contact (2), the switch-on (5), the electric connection seat (11), the guide line (12), the grounding contact (13), the guide column (303) and the return line (308) are all made of copper materials.