CN214505376U - Circuit that rebounds is prevented in circuit breaker divide-shut brake - Google Patents
Circuit that rebounds is prevented in circuit breaker divide-shut brake Download PDFInfo
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- CN214505376U CN214505376U CN202120965760.1U CN202120965760U CN214505376U CN 214505376 U CN214505376 U CN 214505376U CN 202120965760 U CN202120965760 U CN 202120965760U CN 214505376 U CN214505376 U CN 214505376U
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Abstract
The utility model discloses a circuit that prevents kickback is opened in circuit breaker divide-shut brake, the circuit breaker includes explosion chamber, static contact, moving contact and motion pole, be connected with separating brake mechanism and combined floodgate mechanism on the motion pole, combined floodgate mechanism includes the combined floodgate circuit, the combined floodgate circuit includes inductance coil one, inductance coil one connects with first electric capacity and second electric capacity on and, first electric capacity and second electric capacity connect in series respectively on the parallel branch road of separately locating first silicon controlled rectifier and second silicon controlled rectifier; the first capacitor stores electric energy required by closing, the first controlled silicon is conducted during closing, the second capacitor stores electric energy required by deceleration of the repulsion plate during closing, and the second controlled silicon is conducted when the repulsion plate moves to the tail end during closing; the utility model discloses a circuit that prevents kickback is closed to circuit breaker divide-shut brake through "non-contact" electromagnetic induction speed reduction, and the repulsion dish or the moving contact collision impact force when moving to the end are almost zero, have slow down effectual, the practicality is strong, advantages such as long service life.
Description
Technical Field
The utility model belongs to the circuit breaker field, more specifically the utility model relates to a circuit that prevents rebounding is opened and shut to circuit breaker.
Background
Vacuum circuit breakers are so named because the arc-extinguishing medium and the insulating medium in the contact gap after arc extinction are both high vacuum. The vacuum circuit breaker has the advantages of small volume, light weight, suitability for frequent operation, no need of maintenance after arc extinction and the like, is used for protecting and controlling electrical equipment in industrial and mining enterprises, power plants and transformer substations, is particularly suitable for use places requiring no oiling, less maintenance and frequent operation, and is relatively popularized in three-phase mating power grids of 3-35 kV and 50 Hz. The vacuum circuit breaker of the electromagnetic repulsion force driving system has the advantages of high closing and opening speed and the like, so that the application of the vacuum circuit breaker is more and more extensive. However, the existing vacuum circuit breakers of the electromagnetic repulsion force driving system in the market at present have obvious defects: firstly, mechanical collision deceleration is poor in deceleration effect, secondary noise is easy to generate, and an original system needs to be changed; secondly, the speed is extremely fast when the closing is stopped, the contact of the arc extinguish chamber is easy to wear, and the service life is short.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a circuit that rebounds is prevented to circuit breaker divide-shut brake, through "non-contact" electromagnetic induction speed reduction, the impact force of repulsion dish or moving contact when moving to the end is almost zero, has advantages such as slow down effectually, the practicality is strong, long service life.
The utility model provides a circuit breaker divide-shut brake anti-bounce circuit, the circuit breaker includes the explosion chamber, arranges static contact and moving contact and the motion pole with moving contact fixed connection in the explosion chamber in, be connected with the repulsion dish on the motion pole and drive the repulsion dish motion and realize the separating brake mechanism and the closing mechanism that the moving contact divides and shuts; the switching-on mechanism comprises a switching-on circuit, the switching-on circuit comprises an inductance coil I, a first capacitor and a second capacitor are connected to the inductance coil I in parallel, and a first silicon controlled rectifier and a second silicon controlled rectifier are respectively connected to parallel branches where the first capacitor and the second capacitor are respectively located in series; the first capacitor stores electric energy required by closing, the first controlled silicon is conducted during closing, the second capacitor stores electric energy required by deceleration of the repulsion plate during closing, and the second controlled silicon is conducted when the repulsion plate moves to the tail end during closing.
Preferably, the switching-off mechanism comprises a switching-off circuit, the switching-off circuit comprises a second inductance coil, and a third capacitor and a third controllable silicon are connected to the second inductance coil in series; the third capacitor stores the electric energy required by opening, and the third controllable silicon is conducted when opening.
Preferably, the opening circuit is further connected with an opening speed reduction circuit, the opening speed reduction circuit comprises a fourth capacitor and a fourth controlled silicon which are connected in series, the fourth capacitor and the fourth controlled silicon are connected with the third capacitor and the third controlled silicon in parallel, electric energy required by the deceleration of the repulsion plate during opening is stored in the fourth capacitor, and the fourth controlled silicon is conducted when the repulsion plate moves to the tail end during opening.
Preferably, the opening mechanism further includes an opening retaining device, the closing mechanism further includes a closing retaining device, the opening circuit and the closing retaining device are both disposed on the side where the repulsive force plate is close to the arc extinguishing chamber, and the closing circuit and the opening retaining device are both disposed on the side where the repulsive force plate is far away from the arc extinguishing chamber.
Preferably, the closing holding device and the opening holding device are provided with annular grooves on opposite sides respectively, the second inductance coil is arranged in the annular groove on the closing holding device, and the first inductance coil is arranged in the annular groove on the opening holding device.
Preferably, the opening holding device and the closing holding device are both provided with metal capable of being attracted by a magnet.
Preferably, a permanent magnet is fixed on the repulsion disk, and two poles of the permanent magnet are respectively close to and far away from two sides of the arc extinguishing chamber towards the repulsion disk.
The utility model discloses technical scheme's a circuit is prevented kickback by circuit breaker divide-shut brake's beneficial effect is:
1. the switching-on circuit is arranged, electric energy required during switching-on is stored in a first capacitor in the switching-on circuit, a first silicon controlled rectifier is switched on during switching-on, electric energy required during switching-on is stored in a second capacitor, and the second silicon controlled rectifier is switched on when the repulsion plate moves to the tail end during switching-on, so that when the moving contact is close to the static contact during switching-on, the moving contact is moved to be close to the static contact to reduce the speed, the speed is almost zero when the moving contact and the static contact are switched on, switching-on collision between the moving contact and the static contact is avoided, switching-on noise is avoided, and meanwhile abrasion caused by switching-on of the moving contact and the static contact is also avoided.
2. The opening circuit and the closing circuit are arranged, so that the repulsion disc, the opening retaining device and the closing retaining device are hardly collided or attracted together by a small impact force in opening and closing, the repulsion disc is prevented from being attracted at a high speed with the opening retaining device and the closing retaining device, the repulsion disc is prevented from rebounding, and the service lives of the repulsion disc, the opening retaining device and the closing retaining device are prolonged.
Drawings
Figure 1 is a schematic diagram of the circuit breaker according to the technical solution of the present invention,
figure 2 is a schematic diagram of a closing circuit of the technical scheme of the utility model,
fig. 3 is the schematic diagram of the switching-off circuit according to the technical solution of the present invention.
Detailed Description
In order to facilitate the understanding of the technical solutions of the present invention by those skilled in the art, the technical solutions of the present invention will now be further described with reference to the drawings attached to the specification.
As shown in fig. 1, the utility model provides a circuit breaker divide-shut brake prevents bounce-back circuit, circuit breaker include explosion chamber 1, arrange static contact 11 and moving contact 12 in explosion chamber 1 in and with moving contact 12 fixed connection's motion pole 100. The moving rod 100 is connected with a repulsion plate 21 and an opening mechanism and a closing mechanism for driving the repulsion plate 21 to move up and down to open and close the moving contact 12.
The opening mechanism includes an opening circuit 42 (the circuit is shown in fig. 3) and an opening holding device 41, and the closing mechanism includes a closing circuit 32 (the circuit is shown in fig. 2) and a closing holding device 31. The opening circuit 42 and the closing holding device 31 are both arranged on the side of the repulsive disc 21 close to the arc extinguishing chamber 1. The closing circuit 32 and the opening holding device 41 are both disposed on the side of the repulsive disc 21 away from the arc extinguishing 1 chamber.
Based on the above technical solution, when switching on, a switching-on magnetic force is induced in the switching-on circuit 32 by a switching-on current, and the switching-on magnetic force overcomes the magnetic force of the permanent magnet on the repulsive disc 21, so as to push the repulsive disc 21 to the switching-on holding device 31, and the repulsive disc 21 is attracted to the switching-on holding device 31, so that the moving contact 12 and the static contact 11 in the arc extinguish chamber 1 are kept in a switching-on state, and are kept in the switching-on state until the current is switched in the switching-off circuit 42.
Based on the above technical solution, during opening, the opening circuit 42 induces an opening magnetic force through an opening current, the opening magnetic force overcomes a magnetic force of a permanent magnet on the repulsive disc 21, the repulsive disc 21 is pushed to the opening retaining device 41, and the repulsive disc 21 and the opening retaining device 41 attract each other, so that the moving contact 12 is kept in an opening state with the fixed contact 11, and is kept in the opening state until the current is switched in the closing circuit 32.
As shown in fig. 1, the closing holding device 31 and the opening holding device 41 are each provided with an annular groove on the side surface opposite thereto. The opening circuit 42 is disposed in an annular groove on the closing holding device 31. The closing circuit 32 is disposed in an annular groove on the opening holding device 41. The switching-on circuit 32 and the switching-off circuit 42 are respectively embedded into the switching-off holding device 41 and the switching-on holding device 31, and the influence of element processing errors on a driving system is greatly reduced by optimizing the structural design, and meanwhile, the size of the whole structure is also reduced.
As shown in fig. 1, a permanent magnet 22 is fixed on the repulsion disk 21, and two poles of the permanent magnet 22 are respectively close to and far away from two sides of the arc extinguishing chamber 1 towards the repulsion disk 21. The opening holding device 41 and the closing holding device 31 are both provided with metal that can be attracted by a magnet. The permanent magnet 22 in the repulsion plate 21 can provide holding force during closing and opening, so that the using amount of the magnet is greatly reduced, the economical efficiency is improved, the structure of the whole breaker is simplified, the failure rate is reduced, and the use cost is reduced. The opening holding device 41 and the closing holding device 31 are both provided with metal that can be attracted by the permanent magnet. The arrangement of the permanent magnet and the metal simplifies the structure and reduces the cost.
As shown in fig. 2, the closing circuit includes a first inductor L1, and a first capacitor C11 and a second capacitor C12 are connected to the first inductor L1. The parallel branch circuits of the first capacitor C11 and the second capacitor C12 are respectively connected with a first silicon controlled rectifier SCR11 and a second silicon controlled rectifier SCR12 in series. The first capacitor C11 stores the electric energy required for closing, and the first SCR11 is turned on when closing. The second capacitor C12 stores electric energy required by deceleration of the repulsion plate 21 during closing, and the second silicon controlled rectifier SCR12 is turned on when the repulsion plate 21 moves to the tail end during closing.
The first silicon controlled rectifier, the second silicon controlled rectifier, the third silicon controlled rectifier and the fourth silicon controlled rectifier can be replaced by rapid conducting elements such as spark gaps, insulated gate bipolar transistors and the like.
Based on the technical scheme of the upper section, when the switch is switched on, the first silicon controlled rectifier SCR11 is conducted, the first capacitor C11 discharges electricity to the first inductance coil L1, the first inductance coil L1 induces the switch-on magnetic force through the switch-on current, and the switch-on magnetic force overcomes the electromagnetic force on the repulsion plate to push the repulsion plate 21 to the switch-on holding device 31, so that the switch is switched on. When the repulsion plate 21 moves to close with the closing holding device 31, the second silicon controlled rectifier SCR12 is started, the second capacitor C12 discharges electricity to the first inductance coil L1, the first inductance coil L1 induces closing deceleration magnetic force through closing deceleration current, the closing deceleration magnetic force is opposite to the closing magnetic force in direction, the repulsion plate 21 moving at high speed is decelerated rapidly, and then when the repulsion plate 21 moves to the closing holding device 31, the speed is almost zero. Namely, the speed is almost zero when the moving contact and the static contact are switched on, the switching-on collision between the moving contact and the static contact is avoided, the switching-on noise is avoided, and meanwhile, the abrasion of the moving contact and the static contact caused by switching-on is also avoided. Meanwhile, the repulsion disc 21 and the closing keeping device 31 are hardly collided or attracted together at a small speed, the collision force in attraction is small, closing noise is avoided, and the service lives of the repulsion disc 21 and the closing keeping device 31 are prolonged.
As shown in fig. 3, the switching-off circuit 42 includes a second inductor L2, and a third capacitor C21 and a third SCR21 are connected in series with the second inductor L2. The third capacitor C21 stores the electric energy required for opening, and the third SCR21 is turned on when opening. Based on the above technical scheme, when the brake is opened, the third silicon controlled rectifier SCR21 is turned on, the third capacitor C21 discharges to the second inductor L2, the second inductor L2 induces the brake-opening magnetic force through the brake-opening current, and the brake-opening magnetic force overcomes the electromagnetic force on the repulsion plate to push the repulsion plate 21 to the brake-opening retaining device 41, so that the brake opening is realized.
As shown in fig. 3, the opening circuit 42 is further connected to an opening deceleration circuit, and the opening deceleration circuit includes a fourth capacitor C22 and a fourth SCR22 connected in series. The fourth capacitor C22 and the fourth silicon controlled rectifier SCR22 are connected in parallel with the third capacitor C21 and the third silicon controlled rectifier SCR 21. The fourth capacitor C22 stores the electric energy needed by the repulsion plate deceleration during opening, and the fourth silicon controlled rectifier SCR22 is conducted when the repulsion plate 21 is opened to the end. Based on the above technical scheme, when the repulsion plate 21 moves to close with the opening retaining device 41 during opening, the fourth silicon controlled rectifier SCR22 is started, the fourth capacitor C22 discharges to the second inductor coil L2, the second inductor coil L2 induces the opening deceleration magnetic force through the opening deceleration current, the opening deceleration magnetic force is opposite to the opening magnetic force, so that the repulsion plate 21 moving at high speed is decelerated rapidly, and then the speed is almost zero when the repulsion plate 21 moves to the opening retaining device 41. Namely, the repulsion plate 21 and the opening holding device 41 do not collide with each other, thereby avoiding opening noise and prolonging the service life of the repulsion plate 21 and the opening holding device 41. Meanwhile, the repulsion plate 21 is prevented from attracting the opening retaining device 41 or the closing retaining device 31 at a high speed, and the rebound problem of the repulsion plate is avoided.
The technical solution of the present invention is to provide an improved method for manufacturing a semiconductor device, which is characterized in that the method is not limited by the above-mentioned method, and the method is not substantially improved by the method and the device, or the method and the device are directly applied to other occasions without improvement, all within the protection scope of the present invention.
Claims (7)
1. A circuit breaker switching-on and switching-off anti-rebound circuit comprises an arc extinguish chamber, a static contact, a moving contact and a moving rod, wherein the static contact and the moving contact are arranged in the arc extinguish chamber, the moving rod is fixedly connected with the moving contact, a repulsion plate is connected onto the moving rod, and a switching-off mechanism and a switching-on mechanism are used for driving the repulsion plate to move to realize switching-on and switching-off of the moving contact; the first capacitor stores electric energy required by closing, the first controlled silicon is conducted during closing, the second capacitor stores electric energy required by deceleration of the repulsion plate during closing, and the second controlled silicon is conducted when the repulsion plate moves to the tail end during closing.
2. The circuit of claim 1, wherein the opening mechanism comprises an opening circuit, the opening circuit comprises a second inductor coil, and a third capacitor and a third thyristor are connected in series to the second inductor coil; the third capacitor stores the electric energy required by opening, and the third controllable silicon is conducted when opening.
3. The circuit of claim 2, wherein the opening and closing circuit is further connected with an opening deceleration circuit, the opening deceleration circuit comprises a fourth capacitor and a fourth thyristor which are connected in series, the fourth capacitor and the fourth thyristor are connected in parallel with the third capacitor and the third thyristor, electric energy required by deceleration of the repulsion plate during opening is stored in the fourth capacitor, and the fourth thyristor is switched on when the repulsion plate moves to the tail end during opening.
4. The circuit of claim 2, wherein the opening mechanism further comprises an opening retaining device, the closing mechanism further comprises a closing retaining device, the opening circuit and the closing retaining device are both disposed on the side of the repulsive disc close to the arc extinguishing chamber, and the closing circuit and the opening retaining device are both disposed on the side of the repulsive disc far away from the arc extinguishing chamber.
5. The circuit of claim 4, wherein the closing holding device and the opening holding device are provided with annular grooves on opposite sides, the second inductor coil is disposed in the annular groove of the closing holding device, and the first inductor coil is disposed in the annular groove of the opening holding device.
6. The circuit breaker opening and closing switch anti-bounce circuit according to claim 4, wherein the opening retaining device and the closing retaining device are both provided with metal capable of being attracted by a magnet.
7. The circuit of claim 1, wherein a permanent magnet is fixed on the repulsion plate, and two poles of the permanent magnet are respectively close to and far away from two sides of the arc extinguish chamber towards the repulsion plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120965760.1U CN214505376U (en) | 2021-05-08 | 2021-05-08 | Circuit that rebounds is prevented in circuit breaker divide-shut brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120965760.1U CN214505376U (en) | 2021-05-08 | 2021-05-08 | Circuit that rebounds is prevented in circuit breaker divide-shut brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214505376U true CN214505376U (en) | 2021-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120965760.1U Active CN214505376U (en) | 2021-05-08 | 2021-05-08 | Circuit that rebounds is prevented in circuit breaker divide-shut brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214505376U (en) |
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2021
- 2021-05-08 CN CN202120965760.1U patent/CN214505376U/en active Active
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