CN213845186U

CN213845186U - Upper-inlet and upper-outlet type circuit breaker

Info

Publication number: CN213845186U
Application number: CN202023127781.0U
Authority: CN
Inventors: 陈友; 刘继勇
Original assignee: Zhongshan Keke Electrical Appliance Co ltd
Current assignee: Zhongshan Keke Electrical Appliance Co ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-07-30
Anticipated expiration: 2030-12-22

Abstract

The utility model provides an upper-inlet upper-outlet type circuit breaker, including a casing, still include: the arc extinguishing cover is arranged at the bottom of the shell of the circuit breaker; the magnetic release is positioned on one side of the arc extinguishing cover; the wire inlet end and the wire outlet end are respectively positioned on one side of the arc extinguishing cover away from the magnetic release; the push rod is positioned on the upper surface of the arc extinguishing cover; the contact actuating mechanism is fixedly arranged on the side wall close to the wire inlet end and the wire outlet end; the push rod of the magnetic release is in contact with one end of the push rod, and the push rod can push the push rod to move towards the direction far away from the magnetic release until the other end of the push rod is in contact with the contact actuating mechanism so as to trigger the contact actuating mechanism. The utility model discloses an upward go up out formula circuit breaker, when the circuit breaker was as master switch, all locate master switch top with inlet wire end and leading-out terminal, have that the line is simple, occupation space is little, pleasing to the eye degree is high, characteristics with low costs, that the security is good.

Description

Upper-inlet and upper-outlet type circuit breaker

Technical Field

The utility model relates to an electrical switch control technical field especially relates to an upper-inlet and upper-outlet type circuit breaker.

Background

In the prior art, as a circuit protection device, a circuit breaker is required to protect a circuit when overcurrent and short-circuit faults occur.

The prior art circuit breakers are single pole, double pole, triple pole or quadruple pole.

Referring to fig. 1, a circuit breaker in the prior art includes: the device comprises a shell 1, a wire inlet end 2, a wire outlet end 3, a contact action mechanism 4, a magnetic release 5, a rear-end bus 6, an arc extinguishing cover 7 and a handle 13, wherein the wire inlet end 2, the wire outlet end 3, the contact action mechanism, the magnetic release 5, the rear-end bus 6, the arc extinguishing cover 7 and the handle 13 are arranged in the shell 1; the contact actuating mechanism 4 includes a fixed contact 401 and a movable contact 402.

Referring to fig. 3, taking a dipole as an example, the incoming line end 2 and the outgoing line end 3 are disposed on two opposite sides of the housing 1, the incoming line end 2 is connected with a power incoming line 8, and the outgoing line end 3 is connected with an external connection 9; the external connection 9 includes an external wire or a bus bar.

The contact actuating mechanism 4 is provided on one side of the line inlet terminal 2, and the movable contact 402 is electrically connected to the line inlet terminal 2.

One end of the handle 13 is located at the top of the inner side of the housing 1, the other end extends out of the housing 1, and one end of the handle 8 located inside the housing 1 is connected with the contact actuating mechanism 4.

The arc extinguishing chamber 7 is positioned at the bottom of the shell 1, and the upper end of the arc extinguishing chamber 7 is provided with the magnetic release 5.

One end of the electromagnetic coil of the magnetic release 5 is electrically connected with the stationary contact 401, and the other end of the electromagnetic coil of the magnetic release 5 is electrically connected with the outlet terminal 3 through the rear-section bus 6.

When the handle 13 is pushed upward, the first contact operating mechanism 4 operates to bring the fixed contact 401 into contact with the movable contact 402, and at this time, power is output to the branch switch through the breaker.

When an excessive overcurrent or short-circuit fault occurs in the line, the ejector rod of the magnetic release 5 acts to trigger the first contact action mechanism 4, so that the first fixed contact 401 and the first movable contact 402 are separated, and the line is disconnected.

Referring to fig. 2, when installed, the incoming line terminal 2 is above the circuit breaker and the outgoing line terminal 3 is below the circuit breaker. The position of the port for going in and out is arranged, and the port serves as a terminal circuit protection device, so that the direct load control is practical. However, when this circuit breaker is used as a master switch in a two-pole or multi-pole protection circuit, the top-in-bottom-out port arrangement has many disadvantages. When wiring, a power line is led in from the upper wire inlet end of the main switch, and a wire is led out from the lower wire outlet end. The main switch and the branch switch are commonly installed in a mode that the main switch and the branch switch are adjacent and parallel in the same horizontal row, an outgoing line winds to the upper side of the main switch from a reserved roadway on the outer side face, the back face or the inner side of the main switch and is connected with an incoming line end of the branch switch, wherein the branch switch comprises other circuit breakers, a self-recovery overvoltage and undervoltage protector and a leakage protection circuit breaker.

With this connection, the following problems arise: the method has the advantages of large number of connecting wires, large workload of connecting wires, high requirement on connecting technology, low connecting speed, large occupied space of connection, poor aesthetic degree after connection, poor consistency of batch connection, high comprehensive production cost, poor connecting effect, low safety, multiple fault points, easy influence of vibration on electrical stability and the like.

SUMMERY OF THE UTILITY MODEL

In view of the above prior art's shortcoming, the utility model aims to provide an go up out formula circuit breaker on for lead-in terminal and leading-out terminal are located the circuit breaker both sides respectively among the solution prior art, cause the line complicated, occupation space is big, pleasing to the eye degree is poor, with high costs, the poor problem of security.

In order to achieve the above and other related objects, the present invention provides an upward-entering and upward-exiting circuit breaker, which comprises a housing, an arc-extinguishing chamber, a magnetic trip, an incoming line end, a outgoing line end, a push rod, a contact actuating mechanism and a handle;

the arc extinguishing cover is arranged at the bottom of the shell;

the magnetic release is positioned on one side of the arc extinguishing cover;

the wire inlet end and the wire outlet end are respectively positioned on one side of the arc extinguishing cover away from the magnetic release;

the push rod is positioned on the upper surface of the arc extinguishing chamber;

one end of the handle is positioned at the top of the inner side of the shell, and the other end of the handle extends out of the shell;

the contact actuating mechanism is fixedly arranged on the side wall of the shell close to the wire inlet end and the wire outlet end;

the contact actuating mechanism is connected with one end of the handle positioned in the shell;

the contact action mechanism comprises a movable contact and a fixed contact, the movable contact is electrically connected with the wire inlet end, the fixed contact is electrically connected with one end of the coil of the magnetic release, and the other end of the coil of the magnetic release is electrically connected with the wire outlet end;

the push rod of the magnetic release is in contact with one end of the push rod, and the push rod can push the push rod to move towards the direction far away from the magnetic release until the other end of the push rod is in contact with the contact actuating mechanism so as to trigger the contact actuating mechanism.

In an embodiment of the present invention, the height difference between the wire inlet end and the wire outlet end to the bottom of the housing is different.

In an embodiment of the present invention, the upper-inlet and upper-outlet type circuit breaker further includes a rear-end bus, and the other end of the coil of the magnetic trip passes through the rear-end bus and the leading-out terminal is electrically connected.

In an embodiment of the present invention, a bus duct is reserved between the bottom of the housing and the arc extinguishing chamber, for the rear-end bus to route.

In an embodiment of the present invention, the wire-leading end is provided with a wire-pressing frame, the wire-pressing frame is electrically connected to the rear-end bus bar, and the external connection is crimped to the inside of the wire-pressing frame.

In an embodiment of the present invention, the wire-out end is provided with a connecting wire, the connecting wire is electrically connected to the rear-end bus bar, and the external connection wire is welded to the connecting wire.

In an embodiment of the present invention, a bracket is fixed on the upper surface of the arc-extinguishing chamber, and the push rod is erected on the bracket; the push rod is close to one end cover of contact actuating mechanism is equipped with the spring, the both ends of spring are equipped with the stopper respectively.

In an embodiment of the present invention, the upper-inlet and upper-outlet type circuit breaker is a monopole, a dipole, a tripolar or a quadrupole.

In an embodiment of the present invention, the number of the incoming line ends and the number of the outgoing line ends matches with the number of poles of the upper-inlet upper-outlet type circuit breaker, and the incoming line ends correspond to the outgoing line ends one to one.

As described above, the utility model discloses an upper-inlet upper-outlet type circuit breaker, when as master switch, with the same one side that the casing was all located to inlet wire end and appearance end, reduced the complexity of wiring, the line is small in quantity, the line work load reduces, connect technical requirement and reduce, can connect at a high speed, the space occupies for a short time, the pleasing to the eye degree is high, connect the uniformity in batches good, the wire use amount is little, synthesize low in production cost, the connection effect is good, the security is high, the fault point is few, be difficult for receiving the vibration influence, electrical stability is good.

Drawings

Fig. 1 is a sectional view showing an internal structure of a circuit breaker disclosed in the related art.

Fig. 2 shows a top view of a circuit breaker disclosed in the prior art.

Fig. 3 is a perspective view schematically showing a circuit breaker disclosed in the prior art.

Fig. 4 is a sectional view showing an internal structure of the crimping type upper-inlet and upper-outlet circuit breaker disclosed in the embodiment of the present invention.

Fig. 5 is a sectional view showing an internal structure of a welded type top-in and top-out type circuit breaker according to an embodiment of the present invention.

Fig. 6 is a top view of a bipolar crimp-style top-entry and top-exit circuit breaker as disclosed in an embodiment of the present invention.

Fig. 7 is a top view of a bipolar welding type top-entry and top-exit circuit breaker according to an embodiment of the present invention.

Fig. 8 is a schematic diagram of the connection of the top-in and top-out type circuit breaker as a main switch disclosed in the embodiment of the present invention.

Element number description:

1-a shell; 2-a wire inlet end; 3-a wire outlet end; 4-a contact actuation mechanism; 5-magnetic release; 6-rear end bus; 7-arc extinguishing chamber;

8, power supply incoming line; 9-external wiring; 10-a push rod; 11-a spring; 12-a scaffold; 13-a handle;

14-self-healing overvoltage and undervoltage protector; 15-bimetallic strip; 16-bent pieces; 17-a contact cord;

301-line pressing frame; 302-connecting wires; 401 — stationary contact; 402-moving contact; 501-mandril.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

Please refer to fig. 4 to 8. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

Referring to fig. 4, the top-in and top-out type circuit breaker of the present invention includes a housing 1, a wire inlet end 2, a wire outlet end 3, a contact actuating mechanism 4, a magnetic trip 5, a rear-end bus 6, an arc extinguishing chamber 7, a push rod 10 and a handle 13; wherein, the shell 1 is an insulating shell.

For traditional circuit breaker, the utility model discloses all change leading-out terminal 3, magnetic trip 5, arc-extinguish chamber 7, rear end generating line 6's position, but their function does not change separately, does not produce the change influence to the short circuit control ability of circuit breaker, the function of opening circuit, also does not produce the variability influence to the overload protection control ability of circuit breaker, specific theory:

referring to fig. 4, the arc extinguishing chamber 7 is disposed at the bottom of the housing 1, the magnetic trip 5 is disposed at one side of the arc extinguishing chamber 7, the top end of the magnetic trip 5 is provided with a push rod 501, the push rod 10 is disposed on the upper surface of the arc extinguishing chamber 7, and the push rod 501 contacts with one end of the push rod 10.

The upper surface of the arc extinguishing chamber 7 is also provided with a support 12, a push rod 10 is erected on the support 12, one end of the push rod 10 close to the contact actuating mechanism 4 is sleeved with a spring 11, and two ends of the spring 11 are respectively provided with a limiting block.

One end of the handle 13 is arranged on the top of the housing 1, the other end extends out of the housing 1, and the end located inside the housing is connected with the contact actuating mechanism 4.

The contact actuating mechanism 4 is fixedly arranged on the side wall of the shell 1 close to the wire inlet end 2 and the wire outlet end 3, and the contact actuating mechanism 4 comprises a fixed contact 401 and a movable contact 402.

By adopting the scheme, when an extra-large overcurrent and short-circuit fault occurs in an output line or a rear-end load, the magnetic release 5 acts, the ejector rod is ejected outwards, the ejector rod 501 pushes the push rod 10 to move towards the direction far away from the magnetic release 5 until the other end of the push rod 10 is contacted with the contact action mechanism 4 to trigger the contact action mechanism 4, so that the fixed contact 401 and the movable contact 402 are separated to complete the action of breaking a circuit, and the extra-large overcurrent and short-circuit protection is realized. Meanwhile, the spring 11 is compressed while the push rod moves horizontally, after the push rod 10 pushes the contact actuating mechanism 4 to act, the magnetic release 5 loses a large magnetic field due to power failure, the push rod returns to the original position without abutting against the push rod 10, and the push rod 10 returns to the original position under the reaction of the spring 11.

Referring to fig. 5, the top-in and top-out type circuit breaker of the present invention further includes a bimetal 15, a bending piece 16, and a contact cord 17.

When a general overcurrent fault occurs in a circuit or a load, the magnetic release 5 does not act; the overload current flows into the front end of the bimetallic strip 15 through the bending piece 16 electrically connected with the wire inlet end 2, and then flows to the movable contact 402 through the contact flexible wire 17 electrically connected with the rear end of the bimetallic strip 15; when overcurrent passes through the bimetallic strip 15, the internal resistance of the bimetallic strip 15 is heated by the overcurrent to generate and accumulate excessive heat, so that the dynamic range of thermal bending balance of the bimetallic strip 15 when the current within the rated current value is only passed is broken through, the excessive heat generates excessive bending, the bimetallic strip 15 generates excessive bending towards the disconnection direction, the contact action mechanism 4 is synchronously pulled to slowly move towards the disconnection direction, finally, the contact action mechanism 4 is triggered to act, the movable contact 402 is pulled away from the fixed contact 401, and the circuit breaker is disconnected. After the breaker is disconnected, no current passes through the bimetallic strip 15, and the bimetallic strip 15 slowly bends back along with the emission of the measured quantity and gradually returns to the initial state, so that the breaker is prepared for being switched on after the fault is eliminated.

Referring to fig. 4, the wire inlet end 2 and the wire outlet end 3 are both located on a side of the arc chute 7 away from the magnetic release 5; the height of the inlet terminal 2 and the outlet terminal 3 with respect to the bottom of the housing 1 is different. In the embodiment, the wire inlet end 2 and the wire outlet end 3 are fixed on the shell 1, the wire outlet end 3 is arranged behind the wire inlet end 2, and the wire inlet end 2 and the wire outlet end 3 are insulated from each other; with this structure, wiring errors can be effectively prevented.

The wire inlet end 2 is connected with a power supply wire inlet 8, and the wire outlet end 3 is connected with an external wiring 9; wherein, external connection 9 includes external wire or busbar, and outlet terminal 3 has two kinds of connected modes with external connection 9: crimping and welding. By adopting the connection method, the problem of wrong connection is not easy to occur.

Referring to fig. 4, when the crimping method is adopted, the wire outlet end 3 is provided with a wire pressing frame 301, the wire pressing frame 301 is electrically connected with the rear-end bus 6, and an external wire or bus is crimped into the wire pressing frame 301.

Referring to fig. 5, when the welding method is adopted, the outlet terminal 3 is provided with a connecting wire 302, the connecting wire 302 is electrically connected with the rear-end bus 6, and an external wire or bus is welded to the connecting wire 302.

Referring to fig. 4, one end of the coil of the magnetic release 5 is electrically connected to the stationary contact 401, and the other end is electrically connected to the outlet terminal 3 through the rear-end bus 6; a bus channel is reserved between the bottom of the shell 1 and the arc extinguishing cover 7 for the wiring of the rear-end bus 6.

It should be noted that, after the outlet terminal 3 is moved to the same side of the inlet terminal 2, the rear-end bus 6 is also extended to the same side of the outlet terminal 3, and there is no space below the arc-extinguishing chamber 7 of the conventional circuit breaker, and the volume of the arc-extinguishing chamber 7 cannot be reduced due to the characteristic of the circuit breaker, so that the arc-extinguishing chamber 7 is moved upward appropriately to make room for the rear-end bus 6.

Correspondingly, the space of moving up of arc-extinguish chamber 7 compressed the magnetic trip 5 of traditional circuit breaker, and the space of magnetic trip 5 can not reduce, nevertheless in order to use with other traditional circuit breakers cooperations, the utility model provides a top space of circuit breaker can not expand easily, so move leading-out terminal 3 to 2 one sides of inlet wire end after, move magnetic trip 5 to the circuit breaker and keep away from the vertical placing in inlet wire end 2 one side.

Correspondingly, after the magnetic release 5 is moved to the side of the breaker far away from the incoming line end 2 and is vertically placed, when an output line or a rear end load is short-circuited, the magnetic release 5 acts, the ejector rod 501 is ejected out, but the contact action mechanism 4 cannot be directly pushed to act due to the space distance, so that the action of breaking the circuit is completed, and the pushing work is completed through the additionally arranged push rod 10. The top rod 501 of the magnetic release 5 pushes one end of the push rod 10, the push rod 10 moves horizontally, and the other end of the push rod 10 pushes the contact actuating mechanism 4 to actuate, so as to complete the action of disconnecting the circuit and realize short-circuit protection.

The utility model discloses a go up out formula circuit breaker on enterprising can be monopole, bipolar, tripolar or quadrupole, the quantity of inlet wire end and leading-out terminal and the number of poles phase-match of going up out formula circuit breaker on enterprising, inlet wire end and leading-out terminal one-to-one.

Fig. 6 is a top view of a bipolar press-fit top-up and top-down type circuit breaker.

Fig. 7 is a top view of a bipolar welding type top-in and top-out circuit breaker.

Referring to fig. 8, from left to right, there are a bipolar welding type upper-inlet and upper-outlet circuit breaker, a self-healing overvoltage and undervoltage protector 14 and a conventional upper-inlet and lower-outlet circuit breaker; the power inlet wire 8 is connected to the inlet wire end 2, the outlet wire end 3 is connected with the inlet wire end of the self-recovery overvoltage and undervoltage protector 14 at the middle end through the external connection wire 9, the outlet wire end of the self-recovery overvoltage and undervoltage protector 14 is connected with the inlet wire end of each traditional top-in and bottom-out circuit breaker, and the outlet wire end of each traditional top-in and bottom-out circuit breaker is connected with subsequent devices respectively. By adopting the structure, the connecting lines between the inlet terminals of the upper-inlet upper-outlet type circuit breaker, the self-recovery overvoltage and undervoltage protector and the traditional upper-inlet lower-outlet type circuit breakers are positioned above, so that the problem that in the prior art, the connecting lines need to be wound to the upper side of the main switch from a reserved roadway on the outer side surface, the back surface or the inner side of the main switch and then are connected with the inlet terminals of the branch switches is avoided, the wiring complexity is reduced, the number of the connecting lines is small, the workload of the connecting lines is reduced, the requirements on the connecting technology are reduced, high-speed connection can be realized, the occupied space is small, the attractiveness is high, the batch connection consistency is good, the usage amount of the wires is small, the comprehensive production cost is low, the connecting effect is good, the safety is high, the number of fault points is small, the vibration influence is not easy to cause, and the electrical stability is good.

To sum up, the upper-inlet and upper-outlet type circuit breaker of the utility model is only used as a master switch control occasion and not used as a branch switch; when the circuit breaker is used as a main switch, the incoming line end and the appearance end are arranged above the main switch, so that the wiring complexity is reduced, the wiring quantity is small, the wiring workload is reduced, the connection technical requirement is reduced, high-speed connection can be realized, the space occupation is small, the attractiveness is high, the batch connection consistency is good, the wire usage amount is small, the comprehensive production cost is low, the connection effect is good, the safety is high, the fault point is few, the circuit breaker is not easily influenced by vibration, and the electrical stability is good. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. An upper-in and upper-out type circuit breaker is characterized by comprising a shell, an arc extinguishing cover, a magnetic release, a wire inlet end, a wire outlet end, a push rod, a contact actuating mechanism and a handle;

the arc extinguishing cover is arranged at the bottom of the shell;

the magnetic release is positioned on one side of the arc extinguishing cover;

2. The upper inlet and upper outlet circuit breaker of claim 1, wherein: the height difference from the wire inlet end to the bottom of the shell is different from that from the wire outlet end to the bottom of the shell.

3. The top-entry and top-exit circuit breaker of claim 2, wherein: the upper-inlet and upper-outlet type circuit breaker further comprises a rear-end bus, and the other end of the coil of the magnetic release is electrically connected with the wire outlet end through the rear-end bus.

4. The top-entry and top-exit circuit breaker of claim 3, wherein: and a bus channel is reserved between the bottom of the shell and the arc extinguishing cover and used for wiring the rear-end bus.

5. The top-entry and top-exit circuit breaker of claim 3, wherein: the leading-out terminal is equipped with the line ball frame, the line ball frame with the rear end generating line electricity is connected, and outside wiring crimping arrives in the line ball frame.

6. The top-entry and top-exit circuit breaker of claim 3, wherein: and the wire outlet end is provided with a connecting wire, the connecting wire is electrically connected with the rear-end bus, and an external wiring is welded on the connecting wire.

7. The upper inlet and upper outlet circuit breaker of claim 1, wherein: a bracket is fixed on the upper surface of the arc extinguishing chamber, and the push rod is erected on the bracket; the push rod is close to one end cover of contact actuating mechanism is equipped with the spring, the both ends of spring are equipped with the stopper respectively.

8. The upper inlet and upper outlet circuit breaker of claim 1, wherein: the pole number of the upper-inlet and upper-outlet type circuit breaker is a single pole, a double pole, a three pole or a four pole.

9. The top-entry and top-exit circuit breaker of claim 8, wherein: the number of the wire inlet ends and the number of the wire outlet ends are matched with the pole number of the upper-inlet upper-outlet type circuit breaker, and the wire inlet ends correspond to the wire outlet ends one to one.