CN212907618U - Current limiting device of quick circuit breaker - Google Patents
Current limiting device of quick circuit breaker Download PDFInfo
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- CN212907618U CN212907618U CN202020949142.3U CN202020949142U CN212907618U CN 212907618 U CN212907618 U CN 212907618U CN 202020949142 U CN202020949142 U CN 202020949142U CN 212907618 U CN212907618 U CN 212907618U
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- shell
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- contact rod
- circuit breaker
- movable plate
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Abstract
The utility model discloses a current limiting device of a quick circuit breaker, which comprises a shell, a static contact rod and a movable contact rod, wherein the static contact rod and the movable contact rod are arranged in the shell, an elastic pressing mechanism on the shell is pressed and held on one side of the movable contact rod, and the elastic pressing mechanism comprises a rectangular limit sleeve fixedly arranged on the inner wall of the shell, a rectangular movable plate, a screw rod which runs through the middle part of the rectangular movable plate and is in threaded connection with the rectangular movable plate, and a compression spring which is arranged under the rectangular limit sleeve and is fixedly connected with the static contact rod; the middle part of rectangle fly leaf is provided with pressure sensor, pressure sensor and the singlechip electric connection on the shell lateral wall, the singlechip turns into digital signal transmission from the signal of telecommunication that pressure sensor received and shows for the electronic screen that the shell outside set up. The device can carry out accurate quick regulation to the pressure holding power of elasticity pressure holding mechanism, bears the electronic repulsion that different heavy currents produced to conveniently use the circuit breaker in different usage.
Description
Technical Field
The utility model belongs to the technical field of electrical equipment, concretely relates to current limiting device of quick 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.
The circuit breaker adopts a group of contacts to perform switching-on and switching-off current, and when large short-circuit current occurs, the contacts are difficult to switch off electric arcs, so that high switching-off is difficult to realize. In particular, in the case of a circuit breaker having a rated current of 16A or less, when a large short-circuit current is applied, a problem of breaking the circuit breaker is likely to occur in which a coil or a heating element is blown. A current limiting device needs to be provided.
When the circuit breaker is normally used, the elastic pressing structure is pressed, the contacts on the opposite surfaces of the static contact rod and the movable contact rod are mutually abutted and pressed to form a channel with an external circuit, after a large current passes between the static contact rod and the movable contact rod, electric repulsion is generated to push the static contact rod and the movable contact rod to be away from each other, when a certain distance is kept away, short-circuit current is rapidly disconnected, so that a main circuit is protected, when the circuit breaker is applied to different electric equipment, the passing large current is different, the electric repulsion required to be resisted by the elastic pressing structure is also different, the circuit breaker is designed and manufactured just for the different electric equipment, the cost is increased, manpower and material resources are consumed, the applicability is also insufficient, and the improved design is required.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a quick circuit breaker's current limiting device comes into operation to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a current limiting device of a quick circuit breaker comprises a shell, a static contact rod and a movable contact rod, wherein the static contact rod and the movable contact rod are arranged in the shell, an elastic pressing and holding mechanism on the shell is pressed and held on one side of the movable contact rod, so that contacts on opposite surfaces of the movable contact rod and the static contact rod are pressed and held together, and the elastic pressing and holding mechanism comprises a rectangular limiting sleeve fixedly arranged on the inner wall of the shell, a rectangular movable plate arranged in the rectangular limiting sleeve in a sliding mode, a screw rod penetrating through the middle of the rectangular movable plate and in threaded connection with the rectangular movable plate, and a compression spring arranged under the rectangular limiting sleeve and fixedly connected with the static;
the middle part of rectangle fly leaf is provided with pressure sensor, pressure sensor and the singlechip electric connection on the shell lateral wall, the singlechip turns into digital signal transmission from the signal of telecommunication that pressure sensor received and shows for the electronic screen that the shell outside set up.
Preferably, a movable nut is fixedly arranged in the middle of the rectangular movable plate and sleeved on the outer side of the screw rod and is in threaded connection with the screw rod.
Preferably, the side of the shell is rotatably provided with a knob, and the end part of the screw penetrates through the shell and is fixedly connected with the middle part of the knob.
Preferably, the rectangular limiting sleeve and the shell are of an integrally formed structure, and the shell, the rectangular limiting sleeve, the rectangular movable plate and the screw are made of insulating rubber materials.
Preferably, a buzzer is arranged on the shell and electrically connected with the single chip microcomputer.
The utility model discloses a technological effect and advantage: this quick circuit breaker's current limiting device presses the pressure of holding the mechanism to compression spring through rotatory screw rod adjustment elasticity to the pressure gram number between adjustment movable contact pole and the stationary contact pole, the resistance to electronic repulsion between adjustment movable contact pole and the stationary contact pole, thereby it is different to the application degree of different numerical value heavy currents, thereby guarantee that the circuit breaker is applicable to various consumer, the practicality is stronger, has saved the step to different consumer customization circuit breakers, saves cost and manpower.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the elastic pressing mechanism.
In the figure: 1. a housing; 2. a stationary contact bar; 3. a movable contact rod; 4. an elastic pressing mechanism; 41. a rectangular limiting sleeve; 42. a rectangular movable plate; 43. a screw; 44. a compression spring;
5. a pressure sensor; 6. a single chip microcomputer; 7. an electronic screen; 8. a buzzer; 9. a knob; 10. a movable nut.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a current limiting device of a quick circuit breaker as shown in fig. 1-2, including shell 1 and the stationary contact pole 2 and the movable contact pole 3 that set up inside shell 1, the elasticity on shell 1 is pressed and is held one side of movable contact pole 3 in the pressure, makes the movable contact pole 3 and the contact on the stationary contact pole 2 opposite face press and hold together, elasticity is pressed and is held mechanism 4 by rectangle stop collar 41 of fixed mounting on the inner wall of shell 1, the rectangle movable plate 42 that sets up in rectangle stop collar 41 slidably, run through the middle part of rectangle movable plate 42 and with screw 43 of rectangle movable plate 42 threaded connection and set up in rectangle stop collar 41 under with the compression spring 44 of stationary contact pole 2 fixed connection;
the middle part of rectangle fly leaf 42 is provided with pressure sensor 5, pressure sensor 5 and the singlechip 6 electric connection on the shell 1 lateral wall, singlechip 6 turns into digital signal transmission from the signal of telecommunication that pressure sensor 5 received and shows for the electronic screen 7 that the shell 1 outside set up.
A current limiting device adjusting step, rotating the screw 43 clockwise, due to the screw 43 being in threaded connection with the middle of the rectangular movable plate 42, the rectangular movable plate 42 vertically descends along the screw 43 to press the compression spring 44 on the movable contact rod 3 through the interaction force between the threads, so that the compression spring 44 is shortened to generate a restoring force, and then the compression amount of the compression spring 44 is increased along with the descending of the rectangular movable plate 42, so as to generate a larger restoring force, so that the holding force of one end of the compression spring 44 on the movable contact rod 3 is increased, and simultaneously the restoring forces of the two ends of the compression spring 44 are the same, namely the pressure of the compression spring 44 on the movable contact rod 3 is the same as the pressure of the compression spring 44 on the pressure sensor 5 at the lower side of the rectangular movable plate 42, the pressure sensor 5 converts the pressure signal into a digital signal and transmits the, show specific body pressure gram number on electronic screen 7, through adjustment compression spring 44 pressure gram number, adjust the resistance to electronic repulsion between movable contact rod 3 and the quiet contact rod 2 to the application degree to different numerical value heavy currents is different, thereby guarantees that the circuit breaker is applicable to various consumer, and the practicality is stronger, has saved the step to different consumer customization circuit breakers, saves cost and manpower.
The middle part of the rectangular movable plate 42 is fixedly provided with a movable nut 10, and the movable nut 10 is sleeved outside the screw 43 and is in threaded connection with the screw 43. Through the cooperation between the movable nut 10 and the screw 43, it is ensured that the rectangular movable plate 42 is vertically lifted along the screw 43 in the process of clockwise or counterclockwise rotation of the screw 43.
The side of the shell 1 is rotatably provided with a knob 9, and the end part of the screw 43 penetrates through the shell 1 and is fixedly connected with the middle part of the knob 9. The screw 43 can be conveniently and rapidly rotated by an operator through the knob 9.
The shell 1 is provided with a buzzer 8, and the buzzer 8 is electrically connected with the singlechip 6. When a large current passes through the space between the movable contact rod 3 and the static contact rod 2, the generated electric repulsive force pushes the movable contact rod 3 and the static contact rod 2 to be away from each other, the upper end of the compression spring 44 and the rectangular movable plate 42 are squeezed to generate squeezing force, when the pressure detected by the pressure sensor 5 exceeds a set value, the single chip microcomputer 6 sends a starting signal to the buzzer 8, and the buzzer 8 makes a sound to prompt a maintenance worker.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (5)
1. A current limiting device of a quick circuit breaker comprises a shell (1), a static contact rod (2) and a movable contact rod (3) which are arranged inside the shell (1), wherein an elastic pressing and holding mechanism (4) on the shell (1) presses and holds one side of the movable contact rod (3) so that contacts on opposite surfaces of the movable contact rod (3) and the static contact rod (2) are pressed and held together, and the current limiting device is characterized in that: the elastic pressing and holding mechanism (4) comprises a rectangular limiting sleeve (41) fixedly arranged on the inner wall of the shell (1), a rectangular movable plate (42) arranged in the rectangular limiting sleeve (41) in a sliding mode, a screw rod (43) penetrating through the middle of the rectangular movable plate (42) and in threaded connection with the rectangular movable plate (42), and a compression spring (44) arranged right below the rectangular limiting sleeve (41) and fixedly connected with the static contact rod (2);
the middle part of rectangle fly leaf (42) is provided with pressure sensor (5), pressure sensor (5) and singlechip (6) electric connection on shell (1) lateral wall, singlechip (6) will be followed the signal of telecommunication conversion that pressure sensor (5) received and are shown for electronic screen (7) that shell (1) outside set up for digital signal transmission.
2. The current limiting apparatus of a quick circuit breaker according to claim 1, wherein: the middle part of the rectangular movable plate (42) is fixedly provided with a movable nut (10), and the movable nut (10) is sleeved on the outer side of the screw rod (43) and is in threaded connection with the screw rod (43).
3. The current limiting apparatus of a quick circuit breaker according to claim 1, wherein: the side of the shell (1) is rotatably provided with a knob (9), and the end part of the screw rod (43) penetrates through the middle part of the shell (1) and the knob (9) to be fixedly connected.
4. The current limiting apparatus of a quick circuit breaker according to claim 1, wherein: the rectangular limiting sleeve (41) and the shell (1) are of an integrally formed structure, and the shell (1), the rectangular limiting sleeve (41), the rectangular movable plate (42) and the screw (43) are all made of insulating rubber materials.
5. The current limiting apparatus of a quick circuit breaker according to claim 1, wherein: the shell (1) is provided with a buzzer (8), and the buzzer (8) is electrically connected with the single chip microcomputer (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020949142.3U CN212907618U (en) | 2020-05-29 | 2020-05-29 | Current limiting device of quick circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020949142.3U CN212907618U (en) | 2020-05-29 | 2020-05-29 | Current limiting device of quick circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN212907618U true CN212907618U (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020949142.3U Active CN212907618U (en) | 2020-05-29 | 2020-05-29 | Current limiting device of quick circuit breaker |
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| CN (1) | CN212907618U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023279287A1 (en) * | 2021-07-07 | 2023-01-12 | Abb Schweiz Ag | Sensing apparatus |
-
2020
- 2020-05-29 CN CN202020949142.3U patent/CN212907618U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023279287A1 (en) * | 2021-07-07 | 2023-01-12 | Abb Schweiz Ag | Sensing apparatus |
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