CN112837976A

CN112837976A - Restorable automatic circuit breaker

Info

Publication number: CN112837976A
Application number: CN202011620617.5A
Authority: CN
Inventors: 刘义宝
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-05-25

Abstract

The invention discloses a restorable automatic circuit breaker, which comprises a box body, wherein one side of the box body is fixedly connected with a first electrode, the other side of the box body, corresponding to the first electrode, is fixedly connected with a second electrode, the second electrode is connected with an external circuit, a cavity is formed in the box body, a sliding block is connected in the cavity in a sliding mode, the two sliding blocks are fixedly connected with a baffle together, the center of the baffle is fixedly connected with a sliding electrode, the box body is divided into two parts by the baffle, a memory alloy spring is fixedly welded on the right side part of the sliding electrode, and the other end of the memory alloy spring is fixedly welded on the first electrode. Has the advantages that: through the characteristic that utilizes the memory alloy spring, when the electric current increases in the circuit, the memory alloy spring shrink to automatically pull back the sliding electrode, make the circuit disconnection, thereby protect the safety of electrical apparatus, after a period of time, the device automatic recovery has saved the step that traditional circuit breaker need change the resistance wire.

Description

Restorable automatic circuit breaker

Technical Field

The invention relates to the technical field of circuit breakers, in particular to a recoverable automatic circuit breaker.

Background

The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. The circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to the application range, the high-voltage and low-voltage boundary lines are relatively vague, and the circuit breakers above 3kV are generally called high-voltage electric appliances. The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, the motor and the like, and automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur, and the function of the circuit breaker is equivalent to the combination of a fuse type switch, an over-under-heat relay and the like. Furthermore, no parts need to be changed after breaking the fault current. At present, it has been widely used. Distribution of electricity is an extremely important link in the generation, transmission and use of electricity. The distribution system comprises a transformer and various high-low voltage electrical equipment, and the low-voltage circuit breaker is an electrical appliance with a large using amount.

Due to the fault caused by the short circuit of the circuit, the temperature rises very fast during the short circuit, and if the temperature is reduced after the circuit is disconnected, the circuit can be short-circuited again under the condition of no supervision by the automatic recovery of the circuit, so that the circuit can be continuously short-circuited and broken, the circuit is possibly burnt, and even a fire disaster is caused.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a recoverable automatic circuit breaker.

In order to achieve the purpose, the invention adopts the following technical scheme: the recoverable automatic circuit breaker comprises a box body, wherein a first electrode is fixedly connected to one side of the box body, the first electrode is connected with an external circuit, a second electrode is fixedly connected to the other side, corresponding to the first electrode, of the box body, the second electrode is connected with the external circuit, a cavity is formed in the box body, a sliding block is connected to the interior of the cavity in a sliding mode, a baffle is fixedly connected to the two sliding blocks jointly, a sliding electrode is fixedly connected to the center of the baffle, the box body is divided into two parts by the baffle, the sliding electrode is abutted to the left side of the second electrode, a memory alloy spring is fixedly welded to the right side of the sliding electrode, the other end of the memory alloy spring is fixedly welded to the first electrode, and a fixing device is connected to the baffle and the box.

In the recoverable automatic circuit breaker, the fixing device comprises a fixing block fixed inside the box body in a welding mode, a straight rod is fixed on one side of the block in a welding mode and perpendicular to the block, the straight rod penetrates through the fixing block, a cavity is formed inside the fixing block, the straight rod is located inside the cavity, a limiting block is fixed at one end, located inside the cavity, of the straight rod in a welding mode, fixing hooks are symmetrically connected to two sides of one end, located inside the cavity, of the straight rod in a hinge pin mode, the fixing hooks abut against the inner side of the limiting block, springs are fixedly connected to the two fixing hooks, and the other ends of the two springs are fixedly connected to two sides of.

In the recoverable automatic circuit breaker, the two sides of the cavity are symmetrically provided with the sliding chutes which are communicated with the cavity, the connecting part of the chute and the cavity is connected with a limiting hook in a sliding way, the limiting hook corresponds to the fixed hook, the inside of the sliding chute is connected with a connecting block in a sliding way, the connecting block is welded and fixed with a limit hook, the connecting block is vertical to the limit hook, a return spring is welded and fixed on one side of the connecting block, the return spring is welded and fixed on the bottom end of the sliding chute, the other end of the connecting block is connected with a rotating rod through a pin shaft, the rotating rod is connected with a disc through a pin shaft, the rotating rod is vertical to the connecting block, the inside of the fixing block is rotatably connected with a rotating shaft, the rotating shaft is coaxially welded and fixed with the disc, the rotating shaft penetrates through the box body, and a knob is coaxially welded and fixed at one end, located outside the box body, of the rotating shaft.

In the recoverable automatic circuit breaker, helium is arranged in the cavity, the memory alloy spring is made of shape memory metal, the sliding block is connected with the cavity in a sealing and sliding mode, and the box body is made of insulating plastics.

In the restorable automatic circuit breaker, the spring is welded and fixed on the inner side of the fixed hook, the angle between the spring and the straight rod is 45 degrees, and the two fixed hooks are perpendicular to the straight rod.

In the recoverable automatic circuit breaker, the included angle between the rotating rod and the horizontal plane is 30 degrees, and the knob is provided with anti-skid patterns.

Compared with the prior art, the invention has the advantages that:

1. according to the restorable automatic circuit breaker, the characteristics of the memory alloy spring are utilized, when the current in the circuit is increased, the memory alloy spring contracts, so that the sliding electrode is automatically pulled back, the circuit is disconnected, the safety of an electric appliance is protected, the device is automatically restored after a period of time, and the step that the resistance wire of the traditional circuit breaker needs to be replaced is omitted.

2. According to the restorable automatic circuit breaker provided by the invention, by utilizing the memory alloy spring and the fixing device, when the current in the circuit is huge, the memory alloy spring generates heat, and when the temperature reaches a critical value, the spring contracts so as to fix the fixing device, so that the device cannot be automatically restored, and the damage to people caused by sudden electrification in the maintenance process is prevented.

Drawings

Fig. 1 is a schematic structural diagram of a recoverable automatic circuit breaker according to the present invention;

fig. 2 is an enlarged view of a portion a of a resettable automatic circuit breaker according to the present invention;

fig. 3 is a schematic side view of a recoverable automatic circuit breaker according to the present invention.

In the figure: the device comprises a box body 1, a first electrode 2, a second electrode 3, a cavity 4, a sliding block 5, a baffle 6, a sliding electrode 7, a memory alloy spring 8, a straight rod 9, a fixing block 10, a knob 11, a cavity 12, a fixing hook 13, a limiting block 14, a sliding groove 15, a limiting hook 16, a connecting block 17, a return spring 18, a rotating rod 19, a disc 20, a rotating shaft 21 and a spring 22.

Detailed Description

The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

Referring to fig. 1-3, a recoverable automatic circuit breaker comprises a box body 1, a first electrode 2 is fixedly connected to one side of the box body 1, the first electrode 2 is connected with an external circuit, a second electrode 3 is fixedly connected to the other side of the box body 1 corresponding to the first electrode 2, the second electrode 3 is connected with the external circuit, a cavity 4 is formed in the box body 1, a sliding block 5 is slidably connected to the inside of the cavity 4, a baffle 6 is fixedly connected to the two sliding blocks 5, a sliding electrode 7 is fixedly connected to the center of the baffle 6, the baffle 6 divides the box body 1 into two parts, the sliding electrode 7 abuts against the second electrode 3 at the left side part, a memory alloy spring 8 is fixedly welded to the right side part of the sliding electrode 7, the other end of the memory alloy spring 8 is fixedly welded to the first electrode 2, and the baffle 6 and the.

Fixing device is including welded fastening at the inside fixed block 10 of box 1, dog 6 one side welded fastening has straight-bar 9, straight-bar 9 and dog 6 mutually perpendicular, straight-bar 9 runs through fixed block 10, cavity 12 has been seted up to fixed block 10 inside, straight-bar 9 is located inside cavity 12, straight-bar 9 is located the inside one end welded fastening of cavity 12 and has stopper 14, the bilateral symmetry that straight-bar 9 is located the inside one end of cavity 12 has fixed hook 13 through the round pin hub connection, fixed hook 13 offsets with stopper 14 inboards, equal fixedly connected with spring 22 on two fixed hooks 13, two spring 22 other end fixed connection are in straight-bar 9 both sides.

The two sides of the cavity 12 are symmetrically provided with sliding grooves 15, the sliding grooves 15 are communicated with the cavity 12, the joint of the sliding grooves 15 and the cavity 12 is slidably connected with a limit hook 16, the limit hook 16 corresponds to a fixed hook 13, the inside of the sliding groove 15 is slidably connected with a connecting block 17, the connecting block 17 is fixedly welded with the limit hook 16, the connecting block 17 is perpendicular to the limit hook 16, one side of the connecting block 17 is fixedly welded with a reset spring 18, the reset spring 18 is fixedly welded at the bottom end of the sliding groove 15, the other end of the connecting block 17 is connected with a rotating rod 19 through a pin shaft, the rotating rod 19 is connected with a disc 20 through a pin shaft, the rotating rod 19 is perpendicular to the connecting block 17, the inside of the fixed block 10 is rotatably connected with a rotating shaft 21, the rotating shaft 21 and the disc 20 are coaxially welded and, when the current increases in the circuit, memory alloy spring 8 contracts to automatically pull back sliding electrode 7, make the circuit disconnection, thereby protect the safety of electrical apparatus, after a period of time, the device automatic recovery has saved the step that traditional circuit breaker need change the resistance wire.

Inside helium that is provided with of cavity 4, memory alloy spring 8 adopts shape memory metal to make, slider 5 and the sealed sliding connection of cavity 4, box 1 adopts insulating plastic to make, spring 22 welded fastening is inboard at fixed hook 13, the angle between spring 22 and the straight-bar 9 is 45, two fixed hooks 13 and straight-bar 9 mutually perpendicular, dwang 19 is 30 with the contained angle of horizontal plane, be provided with anti-skidding decorative pattern on the knob 11, through utilizing memory alloy spring 8 and fixing device, when the electric current in the circuit is huge, memory alloy spring 8 generates heat, when its temperature reachs the critical value, thereby the spring shrink makes fixing device fixed, make the unable automatic recovery of device, prevent in the maintenance process, the sudden power on, cause the injury to the people.

In the invention, the first electrode 2 and the second electrode 3 are firstly communicated with an external circuit, and in an initial state, the second electrode 3 is pressed against the sliding electrode 7 to connect the circuit, when the circuit is short-circuited, the current is increased instantaneously, so that the memory alloy spring 8 contracts, the sliding electrode 7 is pulled, the baffle 6 slides along with the sliding electrode 7, the circuit is cut off, the memory alloy spring 8 starts to recover, because the friction between the sliding block 5 and the box body 1 is large, the baffle 6 slides slowly, so that time is reserved, people can process the short-circuit position, by utilizing the characteristics of the memory alloy spring 8, when the current in the circuit increases, the memory alloy spring 8 contracts, thereby automatically drawing back sliding electrode 7 for the circuit disconnection, thereby protecting the safety of electrical apparatus, after a period of time, the device resumes automatically, has saved the step that traditional circuit breaker need change the resistance wire. When the current in the circuit is large, the electrical appliance is damaged, when the memory alloy spring 8 flows large current, the memory alloy spring 8 generates heat, after the temperature reaches a critical value, the memory alloy spring 8 recovers to be in a high-temperature phase shape, so the memory alloy spring contracts violently, the straight rod 9 is driven to slide, the fixing hook 13 moves inwards, then the fixing hook 13 rotates under the action of the limiting hook 16, then the fixing hook 13 is fixed with the limiting hook 16, by utilizing the memory alloy spring 8 and the fixing device, when the current in the circuit is large, the memory alloy spring 8 generates heat, when the temperature reaches the critical value, the spring contracts, so that the fixing device is fixed, the device cannot automatically recover, the sudden power-on and the injury to people are prevented in the maintenance process, when the maintenance is finished, the knob 11 is rotated, the rotating shaft 21 is driven to rotate, and the disc 20 is rotated, the rotating rod 19 is driven to rotate, so that the connecting block 17 is pushed to slide in the sliding groove 15, the return spring 18 is extruded, the limit hook 16 is driven to slide, the limit of the fixed hook 13 is released, and therefore the device can be restored to the initial state, so that the circuit is switched on.

Although the terms of the case 1, the first electrode 2, the second electrode 3, the cavity 4, the slider 5, the baffle 6, the sliding electrode 7, the memory alloy spring 8, the straight rod 9, the fixing block 10, the knob 11, the cavity 12, the fixing hook 13, the stopper 14, the sliding groove 15, the stopper hook 16, the connecting block 17, the return spring 18, the rotating rod 19, the disk 20, the rotating shaft 21, the spring 22, and the like are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. The recoverable automatic circuit breaker comprises a box body (1), and is characterized in that one side of the box body (1) is fixedly connected with a first electrode (2), the first electrode (2) is connected with an external circuit, the other side of the box body (1) corresponding to the first electrode (2) is fixedly connected with a second electrode (3), the second electrode (3) is connected with the external circuit, a cavity (4) is formed in the box body (1), a sliding block (5) is connected in the cavity (4) in a sliding manner, the two sliding blocks (5) are fixedly connected with a baffle (6) together, a sliding electrode (7) is fixedly connected to the center of the baffle (6), the box body (1) is divided into two parts by the baffle (6), the sliding electrode (7) is abutted against the second electrode (3) at the left side part, and a memory alloy spring (8) is fixedly welded to the right side part of the sliding electrode (7), the other end of the memory alloy spring (8) is welded and fixed on the first electrode (2), and the baffle (6) and the box body (1) are jointly connected with a fixing device.

2. The recoverable automatic circuit breaker according to claim 1, wherein the fixing device comprises a fixing block (10) fixed inside the box body (1) in a welding manner, a straight rod (9) is fixed on one side of the block (6) in a welding manner, the straight rod (9) is perpendicular to the block (6), the straight rod (9) penetrates through the fixing block (10), a cavity (12) is formed inside the fixing block (10), the straight rod (9) is located inside the cavity (12), a limiting block (14) is fixed on one end of the straight rod (9) located inside the cavity (12) in a welding manner, fixing hooks (13) are symmetrically connected to two sides of one end of the straight rod (9) located inside the cavity (12) through pin shafts, the fixing hooks (13) abut against the inner sides of the limiting block (14), and springs (22) are fixedly connected to the two fixing hooks (13), the other ends of the two springs (22) are fixedly connected to the two sides of the straight rod (9).

3. The recoverable automatic circuit breaker according to claim 2, wherein sliding grooves (15) are symmetrically formed in two sides of the cavity (12), the sliding grooves (15) are communicated with the cavity (12), a limiting hook (16) is slidably connected at the joint of the sliding grooves (15) and the cavity (12), the limiting hook (16) corresponds to the fixed hook (13), a connecting block (17) is slidably connected inside the sliding grooves (15), the connecting block (17) and the limiting hook (16) are fixedly welded, the connecting block (17) and the limiting hook (16) are perpendicular to each other, a return spring (18) is fixedly welded on one side of the connecting block (17), the return spring (18) is fixedly welded on the bottom end of the sliding grooves (15), the other end of the connecting block (17) is connected with a rotating rod (19) through a pin shaft, and the rotating rod (19) is connected with a disc (20) through a pin shaft, dwang (19) and connecting block (17) mutually perpendicular, fixed block (10) internal rotation is connected with pivot (21), pivot (21) and disc (20) coaxial weld are fixed, box (1) is run through in pivot (21), the one end coaxial weld that pivot (21) is located box (1) outside is fixed with knob (11).

4. The automatic restorable circuit breaker according to claim 1, characterized in that helium is provided inside said cavity (4), said memory alloy spring (8) is made of shape memory metal, said slider (5) is connected with said cavity (4) in a sealed sliding manner, and said case (1) is made of insulating plastic.

5. A recoverable automatic circuit breaker according to claim 2, characterized in that said spring (22) is fixed inside a fixed hook (13), the angle between said spring (22) and the straight bar (9) being 45 °, the two fixed hooks (13) being perpendicular to the straight bar (9).

6. A recoverable automatic circuit breaker according to claim 3, wherein the angle between said swivelling levers (19) and the horizontal plane is 30 °, said knob (11) being provided with anti-slip patterns.