CN218867777U - Drawout circuit breaker - Google Patents

Abstract

A draw-out type circuit breaker belongs to the technical field of low-voltage electric appliances. Including circuit breaker body and drawer seat, be equipped with the body at the rear side of circuit breaker body and be qualified for the next round of competitions female arranging, be equipped with in the drawer seat and touch the bridge, characteristics are: still be equipped with at the rear side of circuit breaker body and correct the support, correspond, be equipped with the crossbeam on the drawer seat, push into when the circuit breaker body the in-process of drawer seat, correction support and crossbeam contact, correct the support and accept bulldozing of crossbeam to drive the circuit breaker body and correct its state of toppling, make the body of circuit breaker body is qualified for the next round of competitions female arranging and can keep inserting under the horizontality touch in the bridge. The advantages are that: when the circuit breaker body is drawn to the connecting position in the drawer seat, the overturning phenomenon of the circuit breaker body can be corrected, so that the damage to the contact bridge is avoided.

Description

Drawout circuit breaker

Technical Field

The utility model belongs to the technical field of low-voltage apparatus, concretely relates to draw-out type circuit breaker.

Background

Due to the convenience of inspection and maintenance, the withdrawable universal circuit breaker is widely used. The drawable universal circuit breaker is divided into a circuit breaker body and a drawer seat, the drawer seat is directly connected with an external power supply, and the circuit breaker body can be pushed or drawn in the drawer seat through the driving of a drawer seat transmission mechanism so as to realize the connection and disconnection of the circuit breaker body and the drawer seat.

Referring to fig. 1, the circuit breaker includes a circuit breaker body 1 and a drawer base 2, and the circuit breaker body 1 is movable in and out with respect to the drawer base 2. And a drawer seat outlet line row is arranged behind the drawer seat 2 and is electrically connected with the cabinet internal connecting row. A main body outlet line bank 11 is provided behind the breaker main body 1. A contact bridge 21 is arranged in the drawer seat 2, and one end of the contact bridge 21 is electrically connected with the line outlet row of the drawer seat. When the circuit breaker body 1 enters the connection position in the drawer base 2, the body outlet line bank 11 is inserted into the other end of the contact bridge 21. Therefore, the contact bridge 21 is used for realizing the electric connection between the body outlet line row 11 and the drawer seat outlet line row, so that the circuit breaker body 1 can be connected into a power grid.

Because the top at circuit breaker body 1 and the upside of drawer base 2 open-ended are equipped with the secondary and connect the subassembly for in-process when circuit breaker body 1 is drawn and gets into drawer base 2, circuit breaker body 1 be located by the draw position circuit breaker body 1's lower part, and receive the resistance that is located the secondary on upper portion and connect the subassembly, make circuit breaker body 1 self take place like the phenomenon of overturning of figure 2. When the main body outlet line bank 11 of the circuit breaker main body 1 is inserted into the contact bridge 21, the contact bridge may be damaged due to the inclination of the main body outlet line bank 11.

In view of the above-mentioned prior art, the applicant has made an advantageous design, and the technical solutions described below have been made in this context.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a draw-out type circuit breaker, it is when the circuit breaker body pulls the hookup location to in the drawer seat, can correct the phenomenon of toppling that circuit breaker body self takes place among the prior art to avoid causing the damage to touching the bridge.

The utility model aims at reaching like this, a draw-out type circuit breaker, including circuit breaker body and drawer seat, be equipped with the body at the rear side of circuit breaker body and be qualified for the next round of competitions female arranging, be equipped with in the drawer seat and touch the bridge, still be equipped with the correction support at the rear side of circuit breaker body, correspond, be equipped with the crossbeam on the drawer seat, push into when the circuit breaker body the in-process of drawer seat, correction support and crossbeam contact, correct the support and accept bulldozing of crossbeam to drive circuit breaker body and correct its state of toppling, make the body of circuit breaker body is qualified for the next round of competitions female arranging and can keep inserting under the horizontality touch in the bridge.

In a specific embodiment of the present invention, a pair of side plates is disposed on both sides of the drawer base, and the cross beam is fixed between the pair of side plates.

The utility model discloses a further concrete embodiment the leading-edge of crossbeam be equipped with guide portion, guide portion have the guide inclined plane, in the body of circuit breaker body be qualified for the next round of competitions female arranging contact to touch the removal process before the bridge, this guide inclined plane with correction support contact, bulldoze correction support, and then correct the state of toppling of circuit breaker body.

In another specific embodiment of the present invention, the correcting bracket includes a fixing portion, a bending portion and a roller, the roller is installed at one end of the bending portion, the other end of the bending portion is communicated with the fixing portion, the fixing portion is used for fixing with the rear housing of the circuit breaker body, and the roller is used for contacting with the beam.

In another specific embodiment of the present invention, a traction mechanism is disposed on the drawer seat, and the traction mechanism includes a transmission shaft and a rotating piece fixedly mounted on the transmission shaft; the two sides of the drawer seat are provided with slidable guide rail plates, and the guide rail plates are embedded and matched with the two sides of the circuit breaker body; the rotating sheet pushes and presses the roller on the guide rail plate to drive the circuit breaker body to move relative to the drawer seat.

In still another specific embodiment of the present invention, the beam is bent to form a bottom plate and a top plate, the bottom plate is located below and the top plate is located above, a communicating portion is further provided between the bottom plate and the top plate, the bottom plate, the top plate and the top plate form a structure that is opened toward the front side of the circuit breaker, and the guiding portion is located on the bottom plate.

In yet another specific embodiment of the present invention, when the circuit breaker body is in the connection position, the correction bracket contacts the beam in the height direction.

In a more specific embodiment of the present invention, when the circuit breaker body is in the connection position state, the roller of the correction bracket contacts with the abutting portion of the cross beam, and the abutting portion is located at the rear side of the guiding portion.

The utility model discloses a and then a concrete embodiment the bottom plate on still seted up at least one circuit breaker body be used for holding when being in hookup location correction support's portion of holding, when the circuit breaker body is in hookup location, the both sides portion of holding be located correction support's both sides, both sides portion restricted circuit breaker body rock about on circuit breaker width direction.

In a still more specific embodiment of the present invention, an insulating baffle is disposed below the straightening support.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has: it is equipped with the correction support at the rear side of circuit breaker body the drawer seat on be equipped with the crossbeam, work as the circuit breaker body draw when to hookup location, correction support and crossbeam contact cooperation, and correct the phenomenon of toppling of circuit breaker body, make the body of circuit breaker body is qualified for the next round of competitions female arranging and can keep inserting under the horizontality all the time the bridge of touching in to effectively avoid causing the damage to touching the bridge.

Drawings

Fig. 1 is a schematic diagram of a circuit breaker body and a drawer base in the prior art.

Fig. 2 is a schematic diagram of a circuit breaker body in an overturning state in the prior art.

Fig. 3 is the schematic diagram of the circuit breaker body and the drawer seat.

Fig. 4 is the schematic diagram of the circuit breaker body in the overturning state.

Fig. 5 is a schematic view of the fit between the rotating sheet of the rotating shaft and the roller of the guide rail plate according to the present invention.

Fig. 6 is a schematic view of an embodiment of the cross beam according to the present invention.

Fig. 7 is another perspective view of the beam of fig. 6.

Fig. 8 is a schematic perspective view of the correcting bracket of the present invention.

Fig. 9 is a schematic diagram of the circuit breaker body of the present invention.

In the figure: 1. the circuit breaker comprises a circuit breaker body and a circuit breaker 11, wherein the circuit breaker body is provided with a wire outlet; 2. a drawer seat, 21 contact bridges, 22 side plates; 3. a rotating shaft 31, a rotating sheet; 4. guide rail plates, 41. Rollers; 100. the device comprises a correcting bracket, 1001 fixing parts, 10011 mounting holes, 1002 bending parts, 1003 rollers, 10031 shafts; 200. the cross beam, 201, a mounting plate, 2011, a fixing hole, 202, a bottom plate, 2021, a guide part, 20211, a guide inclined surface, 2022, an abutting part, 2023, an accommodating part, 20231, a side part, 2024, a vent hole, 203, a top plate, 2031, an exhaust hole and 2032 are positioning bosses.

Detailed Description

The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, but the description of the embodiments is not intended to limit the technical solutions, and any changes made in the form of the present invention rather than the essential changes should be considered as the protection scope of the present invention.

In the following description, any concept related to the directions or orientations of up, down, left, right, front, and rear is based on the position shown in the corresponding drawings, and thus should not be construed as particularly limiting the technical solution provided by the present invention.

Referring to fig. 3, 4 and 5, the circuit breaker includes a circuit breaker body 1 and a drawer base 2, wherein the circuit breaker body 1 is movable relative to the drawer base 2. When the circuit breaker body 1 moves towards the drawer base 2, the circuit breaker body 1 experiences three position states, namely a separation position, a test position and a connection position. When the circuit breaker body 1 is in a connection position, the circuit breaker body 1 and the drawer base 2 are in an electric connection device, and the circuit breaker body 1 is connected into a power distribution network.

The rear side of the circuit breaker body 1 is provided with a body outlet line row 11, and the rear side of the drawer seat 2 is provided with a drawer seat outlet line row. A contact bridge 21 is installed in the drawer seat 2, one end of the contact bridge 21 is electrically connected with the line outgoing row of the drawer seat, and the other end of the contact bridge 21 can be used for inserting the line outgoing row 11 of the body. When the circuit breaker body 1 is in the connection position state, the body outlet line 11 is inserted into the other end of the contact bridge 21, thereby completing the electrical connection between the circuit breaker body 1 and the drawer base 2.

The rear of the breaker body 1 is provided with a correction bracket 100. The straightening support 100 protrudes out of the housing of the circuit breaker body 1. The orthodontic bracket 100 is located above the body wire array 11 in a height direction.

A pair of side plates 22 are disposed on two sides of the drawer base 2, and a cross beam 200 is disposed between the pair of side plates 22, generally, the cross beam 200 is formed by processing a metal member, and the cross beam 200 ensures reliable interval arrangement between the pair of side plates 22.

The drawer base 2 is provided with a traction mechanism which is used for drawing the circuit breaker body 1 to move relative to the drawer base 2. The traction mechanism comprises a transmission shaft 3 and a rotating piece 31 fixedly arranged on the transmission shaft 3, and when the rotation shaft 3 rotates, the rotating piece 31 also rotates.

The two sides of the drawer seat 2 are provided with a sliding guide rail plate 4. When the circuit breaker body 1 is placed between the guide rail plates 4, the guide rail plates 4 are matched with the two sides of the circuit breaker body 1 in an embedded mode, and then the circuit breaker body 1 and the circuit breaker body realize synchronous motion. Namely, the traction mechanism drives the circuit breaker body 1 to move in the drawer base 2 by drawing the guide rail plate 4. Specifically, the rotating sheet 31 on the rotating shaft 3 drives the guide rail plate 4 to move.

The guide rail plate 4 is provided with a convex roller 41, and the roller 41 is used for being matched with the rotating sheet 31 and receiving the driving of the rotating sheet 31, so that the guide rail plate 4 can be driven by the rotating sheet 31 to move. The rotating sheet 31 pushes the roller 41 on the guide rail plate 4 to drive the circuit breaker body 1 to move relative to the drawer base 2.

Fig. 6 and 7 are schematic views of the cross beam 200. The beam 200 comprises a pair of mounting plates 201, and the mounting plates 201 are attached to the side plates 22 and used for fixedly mounting the beam 200 between the pair of side plates 22. A fixing hole 2011 is formed in the mounting plate 201, and a screw is used for fixing the mounting plate 201 and the side plate 22 through the fixing hole 2011.

The cross member 200 is bent to form a bottom plate 202 and a top plate 203. The bottom plate 202 is located below and the top plate 203 is located above. A communication portion is further provided between the bottom plate 202 and the top plate 203, and the three form a "]" -shaped structure that opens toward the front side of the circuit breaker.

An exhaust hole 2031 is formed in the top plate 203, and correspondingly, a vent hole 2024 is also formed in the bottom plate 202. The exhaust 2031 and the vent 2024 ensure that gas can be exhausted upward through the beam 200.

A pair of positioning bosses 2032 are further provided on both sides of the cross beam 200, preferably, the positioning bosses 2032 are located on both sides of the top plate 203, and the pair of positioning bosses 2032 can play a positioning role when the cross beam 200 is fixedly installed, thereby ensuring accurate installation position of the cross beam 200.

A guide portion 2021 is disposed at the front edge of the cross beam 200, and specifically, the guide portion 2021 is disposed on the bottom plate 202. In the present embodiment, the guide portion 2021 is in the form of a cuff. The guide portion 2021 has a guide inclined surface 20211, and in the moving process before the main outlet busbar 11 of the circuit breaker body 1 contacts the contact bridge 21, the guide inclined surface 20211 contacts the straightening support 100 to push the straightening support 100, so as to correct the overturning state of the circuit breaker body 1.

An abutting part 2022 is arranged on the rear side of the guide part 2021, when the breaker body 1 enters a connection position, the straightening bracket 100 is in contact with the abutting part 2022, at this time, the abutting part 2022 is located above, and the straightening bracket 100 is located below. The number of the abutting portions 2022 is not limited at all, and three abutting portions are illustrated in the present embodiment, and are respectively provided at intervals in the longitudinal direction of the bottom plate 202.

At least one accommodating part 2023 for accommodating the straightening support 100 when the circuit breaker body 1 is at the connection position is further formed on the bottom plate 202. The number of the accommodating portions 2023 is also not limited at all, and three accommodating portions are illustrated in the present embodiment, and are respectively provided at intervals in the length direction of the bottom plate 202 and correspond to the positions of the abutting portions 2022. When the circuit breaker body 1 is at the connection position, the two side portions 20231 of the accommodating portion 2023 are located at the two sides of the straightening support 100.

Fig. 8 is a schematic view of an orthotic stent 100. The straightening support 100 includes a fixing portion 1001, a bending portion 1002, and a roller 1003, and the roller 1003 is mounted on the bending portion 1002 through a shaft 10031. The roller 1003 is installed on one end of the bending portion 1002, the other end of the bending portion 1002 is communicated with a fixing portion 1001, the fixing portion 1001 is used for being fixed with a rear side housing of the breaker body 1, and the roller 1003 is used for being in contact with the beam 200. The fixing portion 1001 is provided with a mounting hole 10011, and a screw passes through the mounting hole 10011 to mount the fixing portion 1001 to the rear side of the case of the circuit breaker body 1.

The above-mentioned straightening support 100 can be fixed by various mounting methods, and its shape can also be changed correspondingly, for example, a closed slot is opened downwards at the top of the rear side of the casing of the circuit breaker body 1, the straightening support 100 is pushed into the closed slot, and due to the gravity, the straightening support 100 is bound to be located at the closed end of the closed slot, and the mounting and fixing of the straightening support 100 can also be realized.

The roller 1003 can greatly reduce the friction between the straightening support 100 and the cross beam 200, so that the straightening support and the cross beam are more smoothly matched. Preferably, the roller 1003 is a rubber wheel.

Fig. 9 is a schematic view of the circuit breaker body 1 in the connection position. After the circuit breaker body 1 is powered on, an electric repulsive force is generated between the contact bridge 21 and the body outgoing line busbar 11, and because each body outgoing line busbar 11 is influenced by the electric repulsive force, a plurality of electric repulsive forces are combined into a resultant force, such as an electric repulsive force F shown in fig. 9, which is located between the upper and lower body outgoing line busbars 11.

When an overcurrent passes through the breaker body 1, for example (in a short tolerance process), the electric repulsive force F is large at this time, since there is contact between the straightening support 100 and the beam 200 in the height direction of the breaker, the beam 200 has a limit to the straightening support 100, and the breaker body 1 overcomes the spring force of the contact bridge 22 under the action of the electric repulsive force F, a slight amount of forward movement occurs, and finally, F1 applied to the roller 41 by the rotating piece 31 and F2 applied to the straightening support 100 by the beam 200 balance the redundant electric repulsive force F.

In the whole process, the cross beam 200 is used for limiting the correcting bracket 100, so that the body outgoing busbar 11 is always in a horizontal state, and the reliable electric contact between the contact bridge 22 and the circuit breaker body 1 is ensured. In addition, the contact bridge 22 does not need to resist all electric repulsive forces F in the invention, which is beneficial to the miniaturization of the contact bridge 22 and the reduction of the cost.

When the breaker body 1 is in the connection position, two sides 20231 of the accommodating portion 2023 are disposed on two sides of the straightening support 100. At this time, the left and right shaking of the breaker body 1 in the width direction of the breaker is also limited, the breaker body 1 is further stabilized, and the reliable electric contact between the contact bridge 22 and the breaker body 1 is ensured.

When the straightening support 100 is made of a metal material, preferably, an insulating baffle is arranged below the straightening support 100, the insulating baffle can improve the insulating property of the straightening support 100 relative to the main body outgoing line busbar 11, and more preferably, the insulating baffle can be U-shaped and can block the lower part and two sides of the straightening support 100.

In the invention, the cross beam 200 may be a cross beam 200 originally existing in the prior art and located at the top of the drawer base 2, or a separate cross beam 200 specially added for the present technical solution.

Claims (10)

1. The utility model provides a draw-out circuit breaker, includes circuit breaker body (1) and drawer seat (2), is equipped with the body at the rear side of circuit breaker body (1) and is qualified for the next round of competitions female arranging (11), is equipped with in drawer seat (2) and touches bridge (21), its characterized in that: still be equipped with at the rear side of circuit breaker body (1) and correct support (100), correspond, be equipped with crossbeam (200) on drawer seat (2), push into when circuit breaker body (1) the in-process of drawer seat (2), correction support (100) and crossbeam (200) contact, correct support (100) and accept bulldozing of crossbeam (200) to drive circuit breaker body (1) and correct its state of toppling, make the body of circuit breaker body (1) is qualified for the next round of competitions female arranging (11) and can keep inserting under the horizontality contact bridge (21).

2. A draw out circuit breaker according to claim 1, wherein: a pair of side plates (22) is arranged on two sides of the drawer seat (2), and the cross beam (200) is fixed between the side plates (22).

3. A draw-out circuit breaker according to claim 1, wherein: a guide part (2021) is arranged at the front edge of the cross beam (200), the guide part (2021) is provided with a guide inclined plane (20211), and in the moving process before a main body outgoing line busbar (11) of the breaker body (1) contacts the contact bridge (21), the guide inclined plane (20211) contacts the straightening bracket (100) to push the straightening bracket (100) so as to correct the overturning state of the breaker body (1).

4. A draw-out circuit breaker according to claim 3, wherein: the correcting support (100) comprises a fixing part (1001), a bending part (1002) and a roller (1003), the roller (1003) is installed at one end of the bending part (1002), the other end of the bending part (1002) is communicated with the fixing part (1001), the fixing part (1001) is used for being fixed with a rear side shell of the breaker body (1), and the roller (1003) is used for being in contact with the beam (200).

5. A draw out circuit breaker according to claim 1, wherein: the drawer seat (2) is provided with a traction mechanism, and the traction mechanism comprises a transmission shaft (3) and a rotating sheet (31) fixedly arranged on the transmission shaft (3); two sides of the drawer seat (2) are provided with slidable guide rail plates (4), and the guide rail plates (4) are embedded and matched with two sides of the circuit breaker body (1); the rotating sheet (31) pushes and presses the roller (41) on the guide rail plate (4) to drive the breaker body (1) to move relative to the drawer seat (2).

6. A draw-out circuit breaker according to claim 3, wherein: the transverse beam (200) is bent to form a bottom plate (202) and a top plate (203), the bottom plate (202) is positioned below the top plate (203) is positioned above the top plate, a communication part is further arranged between the bottom plate (202) and the top plate (203), the bottom plate (202) and the top plate (203) form a ']' -shaped structure which is opened towards the front side of the circuit breaker, and the guide part (2021) is positioned on the bottom plate (202).

7. A draw out circuit breaker according to claim 1, wherein: when the breaker body (1) is in a connection position, the correcting bracket (100) is in contact with the cross beam (200) in the height direction.

8. A drawout circuit breaker according to claim 4, wherein: when the breaker body (1) is in a connection position state, the roller (1003) of the straightening bracket (100) is in contact with the abutting part (2022) on the cross beam (200), and the abutting part (2022) is located on the rear side of the guide part (2021).

9. A draw out circuit breaker according to claim 6, wherein: the bottom plate (202) is further provided with at least one accommodating part (2023) for accommodating the correcting bracket (100) when the breaker body (1) is in the connecting position, two side parts (20231) of the accommodating part (2023) are positioned on two sides of the correcting bracket (100), and the two side parts (20231) limit the left-right shaking of the breaker body (1) in the width direction of the breaker.

10. A draw out circuit breaker according to claim 1, wherein: an insulating baffle is arranged below the correcting bracket (100).

Images