CN220420518U - Circuit breaker with protect function - Google Patents
Circuit breaker with protect function Download PDFInfo
- Publication number
- CN220420518U CN220420518U CN202321842124.5U CN202321842124U CN220420518U CN 220420518 U CN220420518 U CN 220420518U CN 202321842124 U CN202321842124 U CN 202321842124U CN 220420518 U CN220420518 U CN 220420518U
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- connecting rod
- limiting seat
- circuit
- operating mechanism
- circuit breaker
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- 238000000034 method Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model discloses a circuit breaker with a protection function, which comprises two detachably mounted shells, two wiring terminals symmetrically mounted on the shells, an arc extinguishing chamber arranged between the two wiring terminals, a connecting piece connected with one of the wiring terminals, an electromagnetic release and an operating mechanism mounted on the shells, and an operating handle arranged on the operating mechanism; the connecting piece comprises a first limiting seat arranged on the shell and a second limiting seat arranged on the operating mechanism; the first limiting seat is provided with a waist-shaped hole; the second limiting seat is provided with a preset radian, and the second limiting seat is also provided with a placing hole with the same radian; this device is through two spacing seats that set up, and then can increase the degree of freedom of hot trip pull rod, and then when bimetallic strip leads to its deformation volume less because of working for a long time, the circuit can normally work, when otherwise the circuit short circuit, carries out the brake work, avoids the circuit to appear the mistake brake of breaking, guarantees the safety of circuit and device.
Description
Technical Field
The utility model belongs to the technical field of circuit breakers, and particularly relates to a circuit breaker with a protection function.
Background
The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power line, the motor and the like, automatically cutting off the circuit when serious overload, short circuit, undervoltage and other faults occur, has the function equivalent to the combination of a fuse type switch, an over-under-heating relay and the like, and generally does not need to change parts after breaking fault current.
However, the existing circuit breaker still has some problems, the existing circuit breaker adopts two methods to carry out the brake breaking protection work, one of them is to carry out the brake breaking protection through electromagnetic release, when the circuit appears the short circuit, and then the electric current in the circuit increases, make the magnetic field in the electromagnetic release increase, when it is greater than the elasticity of spring, the push rod can move, and then can promote the moving contact and keep away from the stationary contact, accomplish brake breaking protection work, another mode is through the bimetallic strip that sets up, in its short circuit in-process, can make on the bimetallic strip produce certain heat, and then lead to bimetallic strip crooked, and then can promote the motion of thermal release pull rod, make the moving contact keep away from the stationary contact, accomplish brake breaking protection work, and for the second brake breaking protection mode, operating device is equipped with the connecting seat, and thermal release pull rod one end peg graft in the connecting hole in the connecting seat, through the deformation of bimetallic strip, when the device during the time of use overlength, and then can lead to bimetallic strip when deformation in normal scope, because the free between thermal release pull rod and the connecting seat is too little, and then the circuit breaking protection work is led to the fact the circuit to be broken, and even damage to the normal operation of the circuit in turn.
Therefore, how to reduce the situation that the breaker is erroneously opened due to too long use time is a problem to be solved at present.
Disclosure of Invention
The utility model aims to: a circuit breaker with protection function is provided to solve the above problems existing in the prior art.
The technical scheme is as follows: a circuit breaker with protection function, comprising:
the electromagnetic tripping device comprises two detachably mounted shells, two wiring terminals symmetrically mounted on the shells, an arc extinguishing chamber arranged between the two wiring terminals, a connecting piece connected with one of the wiring terminals, an electromagnetic tripping device and an operating mechanism mounted on the shells, and an operating handle arranged on the operating mechanism;
the connecting piece comprises a first limiting seat arranged on the shell, a second limiting seat arranged on the operating mechanism and a thermal tripping pull rod used for connecting the first limiting seat and the second limiting seat;
the first limiting seat is provided with a waist-shaped hole;
the second limiting seat is provided with a preset radian, and the second limiting seat is also provided with a placing hole with the same radian;
the two ends of the thermal tripping pull rod are respectively positioned in the waist-shaped hole and the placement hole; the operating mechanism is in the prior art.
In a further embodiment, the thermal trip bar includes a first link positioned within the placement hole, a second link vertically connected to the first link, a third link vertically connected to the second link, a fourth link connected to the third link, and a fifth link vertically connected to the fourth link and positioned in the waist-shaped hole;
the first connecting rod, the second connecting rod and the third connecting rod form a U-shaped structure;
the third connecting rod, the fourth connecting rod and the fifth connecting rod form a Z-shaped mechanism.
In a further embodiment, the connecting piece further comprises a connecting rod arranged on the shell and a connecting spring arranged on the connecting rod;
the other end of the connecting spring is connected with the operating mechanism.
In a further embodiment, the connecting piece further comprises a connecting piece connected with one of the connecting terminals, a bimetallic strip and a first arc striking piece which are respectively arranged at two sides of the connecting piece, and an adjusting spring which is positioned at the same side as the first arc striking piece and is arranged on the shell;
the other end of the first striking plate is positioned in the arc extinguishing chamber;
one end of the bimetallic strip is positioned between the first connecting rod and the third connecting rod and is used for pushing the thermal tripping pull rod to move.
In a further embodiment, the electromagnetic release is further provided with a second striking plate, a fixed contact and a moving contact arranged on the operating mechanism;
the movable contact is far away from the fixed contact by the driving of the bimetallic strip, so that the brake breaking work is completed.
In a further embodiment, the shell is further provided with an adjusting part;
the adjusting part comprises a connecting block arranged on the shell, an adjusting screw rod in threaded connection with the connecting block, and an adjusting block arranged at one end of the adjusting screw rod;
the adjusting block is abutted with the bimetallic strip.
The beneficial effects are that: the utility model relates to a circuit breaker with a protection function, which is provided with a first limit seat on a shell, a second limit seat on an operating mechanism and a thermal tripping pull rod for connecting the first limit seat and the second limit seat in order to reduce the situation that the circuit breaker is broken by mistake due to overlong service time; the first limiting seat is provided with a waist-shaped hole; the second limiting seat has predetermined radian, and the hole of placing of same radian has still been seted up on the second limiting seat, through placing hot trip pull rod both ends in waist type hole and place the hole, and then make hot trip pull rod can have certain degree of freedom in the hole, and then make it can move in the hole, and then when the circuit breaker works for a long time, bimetallic strip takes place slight deformation at this moment, and then can make hot trip pull rod move in the hole, can not lead to the moving contact to keep away from the stationary contact this moment, and then can guarantee circuit normal operating, and when the circuit appears short-circuit during operation, the electric current in the circuit increases, and then can lead to hot trip pull rod deflection is great, and then can make hot trip pull rod drive operating device motion, and then make the circuit breaker break the floodgate work, and then can accomplish the disconnection work of circuit, and then can increase the degree of freedom of hot trip pull rod, and then lead to its deformation volume to less because of long-time work at bimetallic strip, the circuit can normally work, when otherwise the circuit short-circuit, can carry out the outage work, and then guarantee that the circuit can break with the safety device of circuit.
Drawings
Fig. 1 is a perspective view of the present utility model.
FIG. 2 is a schematic diagram of the present utility model.
FIG. 3 is a partial schematic view of the present utility model.
FIG. 4 is a schematic view of a connector according to the present utility model.
The reference numerals in the drawings are as follows: the device comprises a shell 1, an adjusting part 2, a connecting block 21, an adjusting screw 22, an adjusting block 23, a wiring terminal 3, a connecting piece 4, a bimetallic strip 41, a first striking piece 42, a connecting piece 43, a first limiting seat 44, a second limiting seat 45, a thermal trip pull rod 46, a first connecting rod 461, a second connecting rod 462, a third connecting rod 463, a fourth connecting rod 464, a fifth connecting rod 465, a connecting rod 47, a connecting spring 48, an adjusting spring 49, an operating mechanism 5, an operating handle 6, an electromagnetic trip 7, a second striking piece 8, an arc extinguishing chamber 9, a moving contact 10 and a fixed contact 11.
Detailed Description
Through research and analysis of the applicant, the reason that this problem (the situation that the breaker is broken due to overlong service time) occurs is that an operating mechanism is provided with a connecting seat, one end of a thermal tripping pull rod is inserted into a connecting hole in the connecting seat, driving of the thermal tripping pull rod is completed through deformation of a bimetallic strip, when the service time of the device is overlong, and further the bimetallic strip is deformed in a normal range, as the degree of freedom between the thermal tripping pull rod and the connecting seat is too small, a moving contact in the breaker is still further led to be far away from a fixed contact, and further the breaking is caused, so that normal operation of a circuit is influenced, and the situation that the breaker is broken due to overlong service time and even the device is caused, and in order to reduce the situation that the breaker is broken due to overlong service time, a first limiting seat on a shell, a second limiting seat on the operating mechanism and the thermal tripping pull rod for connecting the first limiting seat and the second limiting seat are arranged in the device; the first limiting seat is provided with a waist-shaped hole; the second limiting seat has predetermined radian, and the hole of placing of same radian has still been seted up on the second limiting seat, through placing hot trip pull rod both ends in waist type hole and place the hole, and then make hot trip pull rod can have certain degree of freedom in the hole, and then make it can move in the hole, and then when the circuit breaker works for a long time, bimetallic strip takes place slight deformation at this moment, and then can make hot trip pull rod move in the hole, can not lead to the moving contact to keep away from the stationary contact this moment, and then can guarantee circuit normal operating, and when the circuit appears short-circuit during operation, the electric current in the circuit increases, and then can lead to hot trip pull rod deflection is great, and then can make hot trip pull rod drive operating device motion, and then make the circuit breaker break the floodgate work, and then can accomplish the disconnection work of circuit, and then can increase the degree of freedom of hot trip pull rod, and then lead to its deformation volume to less because of long-time work at bimetallic strip, the circuit can normally work, when otherwise the circuit short-circuit, can carry out the outage work, and then guarantee that the circuit can break with the safety device of circuit.
A circuit breaker with protection function, comprising: the device comprises a shell 1, an adjusting part 2, a connecting block 21, an adjusting screw 22, an adjusting block 23, a wiring terminal 3, a connecting piece 4, a bimetallic strip 41, a first striking piece 42, a connecting piece 43, a first limiting seat 44, a second limiting seat 45, a thermal trip pull rod 46, a first connecting rod 461, a second connecting rod 462, a third connecting rod 463, a fourth connecting rod 464, a fifth connecting rod 465, a connecting rod 47, a connecting spring 48, an adjusting spring 49, an operating mechanism 5, an operating handle 6, an electromagnetic trip 7, a second striking piece 8, an arc extinguishing chamber 9, a moving contact 10 and a fixed contact 11.
The device comprises two detachably mounted shells 1, two wiring terminals 3 symmetrically mounted on the shells 1, an arc extinguishing chamber 9 arranged between the two wiring terminals 3, a connecting piece 4 connected with one of the wiring terminals 3, an electromagnetic release 7 and an operating mechanism 5 mounted on the shells 1, and an operating handle 6 arranged on the operating mechanism 5; the connecting piece 4 comprises a first limiting seat 44 arranged on the shell 1, a second limiting seat 45 arranged on the operating mechanism 5, and a thermal tripping pull rod 46 used for connecting the first limiting seat 44 and the second limiting seat 45; the first limiting seat 44 is provided with a waist-shaped hole; the second limiting seat 45 has a preset radian, and the second limiting seat 45 is also provided with a placing hole with the same radian; the two ends of the thermal trip pull rod 46 are respectively positioned in the waist-shaped hole and the placement hole; through placing hot trip pull rod 46 both ends in waist type hole and placing the hole, and then make hot trip pull rod 46 can have certain degree of freedom in the downthehole, and then make it can be at downthehole motion, and then when the circuit breaker works for a long time, bimetallic strip 41 takes place slight deformation this moment, and then can make hot trip pull rod 46 move at downthehole, can not lead to moving contact 10 to keep away from static contact 11 this moment, and then can guarantee circuit normal work, and when the circuit appears short circuit work, the electric current in the circuit increases, and then can lead to hot trip pull rod 46 deflection great, and then can make hot trip pull rod 46 drive operating device 5 motion, and then make the circuit breaker carry out the brake breaking work, and then can accomplish the disconnection work of circuit, through two spacing seats that set up, and then can increase the degree of freedom of hot trip pull rod 46, and then when bimetallic strip 41 leads to its deflection less because of working for a long time, otherwise the circuit can carry out the brake breaking work normally, and then can avoid the circuit to appear the circumstances of breaking brake, and then guarantee the safety of circuit and device.
The thermal trip lever 46 includes a first link 461 positioned in the placement hole, a second link 462 vertically connected to the first link 461, a third link 463 vertically connected to the second link 462, a fourth link 464 connected to the third link 463, and a fifth link 465 vertically connected to the fourth link 464 and positioned in the waist-shaped hole; the first connecting rod 461, the second connecting rod 462 and the third connecting rod 463 form a U-shaped structure; the third, fourth and fifth links 463, 464, 465 form a zig-zag mechanism; through setting up hot trip pull rod 46, and then when bimetallic strip 41 deformation, can promote hot trip pull rod 46 and move, and then can make moving contact 10 keep away from stationary contact 11, realize the brake function.
The connecting piece 4 further comprises a connecting rod 47 arranged on the shell 1 and a connecting spring 48 arranged on the connecting rod 47; the other end of the connecting spring 48 is connected with the operating mechanism 5; through the connecting spring 48 that sets up, and then when moving contact 10 and stationary contact 11 butt, connecting spring 48 belongs to tensile state this moment, and then when hot tripping pull rod 46 is promoted, operating device 5 is in the unblock state this moment, under connecting spring 48's effect, can make moving contact 11 separate rapidly to reach the effect of breaking the floodgate.
The connecting piece 4 further comprises a connecting piece 43 connected with one of the terminals 3, a bimetallic strip 41 and a first striking plate 42 which are respectively arranged at two sides of the connecting piece 43, and an adjusting spring 49 which is positioned at the same side as the first striking plate 42 and is arranged on the shell 1; the other end of the first striking plate 42 is positioned in the arc extinguishing chamber 9; one end of the bimetal 41 is located between the first connecting rod 461 and the third connecting rod 463, and is used for pushing the thermal trip bar 46 to move; the shell 1 is also provided with an adjusting part 2; the adjusting part 2 comprises a connecting block 21 arranged on the shell 1, an adjusting screw 22 in threaded connection with the connecting block 21, and an adjusting block 23 arranged at one end of the adjusting screw 22; the adjusting block 23 is abutted against the bimetallic strip 41; by rotating the adjusting screw 22, the adjusting block 23 is abutted against the bimetal 41, and meanwhile, under the cooperation of the adjusting spring 49, the position of the bimetal 41 can be ensured to be stable, and the current passing is ensured.
The electromagnetic release 7 is also provided with a second arc striking plate 8, a fixed contact 11 and a moving contact 10 arranged on the operating mechanism 5; the movable contact 10 is far away from the fixed contact 11 by the driving of the bimetallic strip 41, so that the brake breaking work is completed; when the circuit is short-circuited, the current in the circuit is increased, the magnetic field in the electromagnetic release 7 is increased, and when the magnetic field is larger than the elastic force of the spring, the push rod can move, so that the movable contact 10 can be pushed to be far away from the fixed contact 11, and the breaking protection work is completed.
Description of working principle: during installation, through placing hot trip pull rod 46 both ends in waist type hole and placing the hole, and then make hot trip pull rod 46 can have certain degree of freedom in the downthehole, and then make it move in the downthehole, and then when the circuit breaker works for a long time, bimetallic strip 41 takes place slight deformation this moment, and then can make hot trip pull rod 46 move in the downthehole, can not lead to moving contact 10 to keep away from static contact 11 this moment, and then can guarantee circuit normal operating, and when the circuit appears short circuit during operation, the electric current in the circuit increases, and then can lead to hot trip pull rod 46 deflection great, and then can make hot trip pull rod 46 drive operating device 5 motion, and then make the circuit breaker break work, and then can accomplish the disconnection work of circuit, through two spacing seats that set up, and then can increase the degree of freedom of hot trip pull rod 46, and then when bimetallic strip 41 causes its deflection less for a long time work, the circuit can normally work, otherwise when the circuit short circuit can carry out the break work, and then can avoid the condition of circuit to appear breaking, and then guarantee the safety and the device of circuit.
As described above, although the present utility model has been shown and described with reference to certain preferred embodiments, it is not to be construed as limiting the utility model itself. Various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (6)
1. A circuit breaker with protection function, comprising:
the electromagnetic tripping device comprises two detachably mounted shells, two wiring terminals symmetrically mounted on the shells, an arc extinguishing chamber arranged between the two wiring terminals, a connecting piece connected with one of the wiring terminals, an electromagnetic tripping device and an operating mechanism mounted on the shells, and an operating handle arranged on the operating mechanism;
the connecting piece comprises a first limiting seat arranged on the shell, a second limiting seat arranged on the operating mechanism and a thermal tripping pull rod used for connecting the first limiting seat and the second limiting seat;
the first limiting seat is provided with a waist-shaped hole;
the second limiting seat is provided with a preset radian, and the second limiting seat is also provided with a placing hole with the same radian;
and two ends of the thermal tripping pull rod are respectively positioned in the waist-shaped hole and the placement hole.
2. A circuit breaker with protection function according to claim 1, characterized in that: the thermal tripping pull rod comprises a first connecting rod positioned in the placement hole, a second connecting rod vertically connected with the first connecting rod, a third connecting rod vertically connected with the second connecting rod, a fourth connecting rod connected with the third connecting rod, and a fifth connecting rod vertically connected with the fourth connecting rod and positioned in the waist-shaped hole;
the first connecting rod, the second connecting rod and the third connecting rod form a U-shaped structure;
the third connecting rod, the fourth connecting rod and the fifth connecting rod form a Z-shaped mechanism.
3. A circuit breaker with protection function according to claim 1, characterized in that: the connecting piece also comprises a connecting rod arranged on the shell and a connecting spring arranged on the connecting rod;
the other end of the connecting spring is connected with the operating mechanism.
4. A circuit breaker with protection function according to claim 2, characterized in that: the connecting piece further comprises a connecting piece connected with one of the wiring terminals, a bimetallic strip and a first arc striking piece which are respectively arranged at two sides of the connecting piece, and an adjusting spring which is positioned at the same side as the first arc striking piece and is arranged on the shell;
the other end of the first striking plate is positioned in the arc extinguishing chamber;
one end of the bimetallic strip is positioned between the first connecting rod and the third connecting rod and is used for pushing the thermal tripping pull rod to move.
5. The circuit breaker with protection function according to claim 4, wherein: the electromagnetic release is also provided with a second arc striking piece, a fixed contact and a moving contact arranged on the operating mechanism;
the movable contact is far away from the fixed contact by the driving of the bimetallic strip, so that the brake breaking work is completed.
6. A circuit breaker with protection function according to claim 3, characterized in that: the shell is also provided with an adjusting part;
the adjusting part comprises a connecting block arranged on the shell, an adjusting screw rod in threaded connection with the connecting block, and an adjusting block arranged at one end of the adjusting screw rod;
the adjusting block is abutted with the bimetallic strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321842124.5U CN220420518U (en) | 2023-07-13 | 2023-07-13 | Circuit breaker with protect function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321842124.5U CN220420518U (en) | 2023-07-13 | 2023-07-13 | Circuit breaker with protect function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220420518U true CN220420518U (en) | 2024-01-30 |
Family
ID=89643794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321842124.5U Active CN220420518U (en) | 2023-07-13 | 2023-07-13 | Circuit breaker with protect function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220420518U (en) |
-
2023
- 2023-07-13 CN CN202321842124.5U patent/CN220420518U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |