CN217182127U

CN217182127U - Drawer seat contact system of frame-type circuit breaker

Info

Publication number: CN217182127U
Application number: CN202220961806.7U
Authority: CN
Inventors: 陈炳新; 刘廷良; 陈奔; 刘成国
Original assignee: Zhejiang Bertley New Material Technology Co ltd
Current assignee: Zhejiang Bertley New Material Technology Co ltd
Priority date: 2022-04-23
Filing date: 2022-04-23
Publication date: 2022-08-12
Anticipated expiration: 2032-04-23

Abstract

The utility model relates to a drawer seat contact system of frame-type circuit breaker, including circuit breaker body generating line, drawer seat generating line, bridge type contact include that support, a plurality of contact piece, the symmetry that set up on the support set up two axles on a plurality of contact pieces, set up at two epaxial extension springs, contact piece both ends symmetry be provided with the contact protrusion, circuit breaker body generating line, drawer seat generating line on be provided with respectively with contact protrusion matched with contact groove, the laminating of contact protrusion in contact groove, and constitute the electricity of circuit breaker body generating line, drawer seat generating line and bridge type contact and be connected, the contact piece on correspond each contact protrusion department and all be provided with the louvre. The utility model has the advantages of simple structure, stable and reliable performance, low temperature rise and high safety.

Description

Drawer seat contact system of frame-type circuit breaker

Technical Field

The utility model relates to a frame-type circuit breaker technical field, concretely relates to frame-type circuit breaker's drawer seat contact system.

Background

The universal circuit breaker is also called frame type circuit breaker, and is a mechanical switch electric appliance which can connect, bear and break the current under the normal circuit condition, and can also connect, bear and break the current for a certain time under the specified abnormal circuit condition. Frame breakers are used to distribute electrical energy and to protect lines and power equipment from overloads, undervoltages, short circuits, and the like. Traditional frame-type withdrawable circuit-breaker mostly adopts the drawer seat to pass through bridge type contact with the body and connects, when the circuit breaker body broke down, releases the body from the drawer seat through operating device on the drawer seat, conveniently maintains the circuit breaker body, and the contact department of contact piece and the generating line of traditional connection bridge type contact adopts sharp linear structure, and the joint department of generating line adopts sharp linear structure, and the contact piece directly influences the temperature rise of frame-type circuit-breaker with the good or bad of generating line contact quality and hangs down. If meet drawer seat generating line and body generating line when not in a straight line, the contact piece is very difficult reliably to contact with the generating line, and the heat dispersion of the contact piece of bridge type contact is relatively poor, causes the circuit breaker temperature rise too high in service, and the accident of burning out the circuit breaker takes place occasionally for this frame-type circuit breaker's life is shorter.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a simple structure, dependable performance, temperature rise are low, the high security's of frame-type circuit breaker drawer seat contact system.

In order to realize the above purpose, the utility model discloses a drawer seat contact system of frame-type circuit breaker, including circuit breaker body generating line, drawer seat generating line, bridge type contact include that support, a plurality of contact piece, the symmetry of setting on the support set up two axles on a plurality of contact pieces, set up at two epaxial extension springs, contact piece both ends symmetry be provided with the contact protrusion, circuit breaker body generating line, drawer seat generating line on be provided with respectively with contact protrusion matched with contact groove, the contact protrusion laminating in contact groove, and constitute the electricity of ware body generating line, drawer seat generating line and bridge type contact and be connected, the contact piece on correspond each contact protrusion department and all be provided with the louvre.

The beneficial effect of above-mentioned structure is: the contact lug boss is symmetrically arranged on the contact piece of the bridge contact, the contact lug boss can be balanced and abutted on a circuit breaker body bus, a drawer seat bus, the contact can be between the contact piece of the bridge contact and the circuit breaker body bus, the contact area of the drawer seat bus can be increased, the contact resistance can be reduced, the heat dissipation area of the contact piece can be increased, the heat dissipation speed is accelerated, the bridge contact and the circuit breaker body bus can be ensured, the drawer seat bus can be reliably contacted, the alternating current has the characteristic of skin effect, the heat dissipation hole can reduce the internal resistance of the contact piece, the heat dissipation area of the contact piece can be increased, the purpose of reducing the temperature rise of the circuit breaker in the running process can be achieved, the weight of the contact piece can be reduced, and the production cost of the bridge contact can be reduced.

Particularly, the contact bulge part is in a semicircular arc shape, and the shape of the contact groove is matched with that of the contact bulge part. The contact bulge is designed to be arc-shaped, so that the contact area between the contact piece of the bridge contact and the bus of the circuit breaker body and the bus of the drawer seat can be increased, the contact resistance can be reduced, the heat dissipation area of the contact piece can be increased, the heat dissipation speed is accelerated, and the improvement of the contact reliability between the bridge contact and the bus of the circuit breaker body and the bus of the drawer seat is facilitated.

Particularly, the heat dissipation holes are square. The alternating current has the characteristic of skin effect, the heat dissipation holes are designed to be square, the internal resistance of the contact piece is reduced, the heat dissipation area of the contact piece can be increased, the weight of the contact piece can be reduced, and therefore the production cost of the bridge contact is reduced.

Particularly, two sides of the bus of the drawer seat are respectively provided with an L-shaped fixed plate connected with the drawer seat. The drawer seat bus is connected to the drawer seat through the L-shaped fixing plate, so that the assembly of the drawer seat bus and the drawer seat is facilitated, and the assembly is more convenient.

Particularly, one end of the circuit breaker body bus is provided with a guide inclined plane matched with the contact bulge, and the contact bulge can slide into the contact groove along the guide inclined plane. The circuit breaker body bus is provided with the guide inclined plane matched with the contact piece, so that the circuit breaker bus can be ensured to be smoothly inserted into the bridge contact, and the connection between the circuit breaker body bus and the bridge contact is ensured to be more reliable.

Drawings

Fig. 1 is a structural diagram of an embodiment of the present invention.

Fig. 2 is a top view of a bridge contact according to an embodiment of the present invention.

Fig. 3 is a front view of a bus bar of a drawer base according to an embodiment of the present invention.

Fig. 4 is a front view of a bus bar of a circuit breaker body according to an embodiment of the present invention.

Fig. 5 is a front view of a contact piece according to an embodiment of the present invention.

Fig. 6 is a front view of the tension spring according to the embodiment of the present invention.

Detailed Description

As shown in fig. 1 to 6, an embodiment of the present invention is a drawer base contact system of a frame-type circuit breaker, including a breaker body bus 10 disposed on a breaker body, a drawer base bus 11 disposed in a drawer base, and a bridge contact 20 connected between the breaker body bus 10 and the drawer base bus 11, where the bridge contact 20 includes a support 21, a plurality of contact pieces 22 disposed on the support 21, two shafts 23 symmetrically disposed on the plurality of contact pieces 22, and tension springs 24 disposed on the two shafts 23, a plug cavity 220 connected with the breaker body bus 10 and the drawer base bus 11 is formed between the plurality of contact pieces 22, contact protrusions 221 are symmetrically disposed at two ends of the contact pieces 22, contact grooves 100 matched with the contact protrusions 221 are respectively disposed on the breaker body bus 10 and the drawer base bus 11, the contact protrusions 221 are attached in the contact grooves 100, and the electrical connection between the road device body bus 10, the drawer seat bus 11 and the bridge contact 20 is formed, and the contact sheet 22 is provided with heat dissipation holes 222 corresponding to the contact protrusions 221. The contact protrusion 221 is in the shape of a semicircular arc, and the shape of the contact groove 100 is matched with that of the contact protrusion. The contact bulge is designed to be arc-shaped, so that the contact area between the contact piece of the bridge contact and the bus of the circuit breaker body and the bus of the drawer seat can be increased, the contact resistance can be reduced, the heat dissipation area of the contact piece can be increased, the heat dissipation speed is accelerated, and the improvement of the contact reliability between the bridge contact and the bus of the circuit breaker body and the bus of the drawer seat is facilitated. The heat dissipation hole 222 is square. The alternating current has the characteristic of skin effect, the heat dissipation holes are designed to be square, the internal resistance of the contact piece is reduced, the heat dissipation area of the contact piece can be increased, the weight of the contact piece can be reduced, and therefore the production cost of the bridge contact is reduced. Two sides of the bus 11 of the drawer seat are respectively provided with an L-shaped fixed plate 12 connected with the drawer seat. The drawer seat bus is connected to the drawer seat through the L-shaped fixing plate, so that the assembly of the drawer seat bus and the drawer seat is facilitated, and the assembly is more convenient.

As shown in fig. 4, a guiding inclined plane 101 is provided at one end of the breaker body busbar 10 to match with the contact protrusion 221, and the contact protrusion 221 can slide into the contact groove 100 along the guiding inclined plane 101. The circuit breaker body bus is provided with the guide inclined plane matched with the contact piece, so that the circuit breaker bus can be ensured to be smoothly inserted into the bridge contact, and the connection between the circuit breaker body bus and the bridge contact is ensured to be more reliable.

The contact lug boss is symmetrically arranged on the contact piece of the bridge contact, the contact lug boss can be balanced and abutted on a circuit breaker body bus, a drawer seat bus, the contact can be between the contact piece of the bridge contact and the circuit breaker body bus, the contact area of the drawer seat bus can be increased, the contact resistance can be reduced, the heat dissipation area of the contact piece can be increased, the heat dissipation speed is accelerated, the bridge contact and the circuit breaker body bus can be ensured, the drawer seat bus can be reliably contacted, the alternating current has the characteristic of skin effect, the heat dissipation hole can reduce the internal resistance of the contact piece, the heat dissipation area of the contact piece can be increased, the purpose of reducing the temperature rise of the circuit breaker in the running process can be achieved, the weight of the contact piece can be reduced, and the production cost of the bridge contact can be reduced.

Claims

1. The utility model provides a drawer seat contact system of frame-type circuit breaker, includes circuit breaker body generating line, drawer seat generating line, bridge type contact include two axles that support, a plurality of contact piece, the symmetry that set up on the support set up on a plurality of contact pieces, set up at two epaxial extension springs, its characterized in that: contact piece both ends symmetry be provided with the contact protrusion, circuit breaker body generating line, drawer seat generating line on be provided with respectively with contact protrusion matched with contact recess, the contact protrusion laminating in contact recess, and constitute the electricity of way ware body generating line, drawer seat generating line and bridge type contact and be connected, the contact piece on correspond each contact protrusion department and all be provided with the louvre.

2. A drawer seat contact system of a frame circuit breaker as claimed in claim 1, wherein: the contact bulge is in a semicircular arc shape, and the shape of the contact groove is matched with that of the contact bulge.

3. A drawer seat contact system of a frame type circuit breaker according to claim 1 or 2, wherein: the heat dissipation holes are square.

4. A drawer seat contact system of a frame type circuit breaker according to claim 1 or 2, wherein: and two sides of the bus of the drawer seat are respectively provided with an L-shaped fixed plate connected with the drawer seat.

5. A drawer seat contact system of a frame type circuit breaker according to claim 1 or 2, wherein: one end of the circuit breaker body bus is provided with a guide inclined plane matched with the contact protrusion part, and the contact protrusion part can slide into the contact groove along the guide inclined plane.