CN116759246A

CN116759246A - Switch device for electric power

Info

Publication number: CN116759246A
Application number: CN202311037414.7A
Authority: CN
Inventors: 贾芸; 毕见
Original assignee: Jiangsu Beigao Electric Technology Co ltd
Current assignee: Jiangsu Beigao Electric Technology Co ltd
Priority date: 2023-08-17
Filing date: 2023-08-17
Publication date: 2023-09-15
Anticipated expiration: 2043-08-17
Also published as: CN116759246B

Abstract

The invention belongs to the technical field of power switches, and discloses a power switching device which comprises an insulating shell, wherein the left side and the right side of the top end of an inner cavity of the insulating shell are respectively provided with a first binding post, the left side and the right side of the bottom end of the inner cavity of the insulating shell are respectively provided with a second binding post, and one ends, relatively far away from the first binding post and the second binding post, of each of the first binding posts and the second binding post are respectively fixedly provided with a metal corrugated rod. The electromagnetic valve is started by using electromagnetic attraction as switch trigger, the power transmission is realized by using the flowing of liquid as pressure, the large-range mechanical action is realized by using the pressure action, and the two contacts are directly disconnected by the mechanical action to realize the disconnection of a circuit.

Description

Switch device for electric power

Technical Field

The invention belongs to the technical field of power switches, and particularly relates to a power switching device.

Background

A power switching device is an electrical device commonly used in a power system for controlling and protecting the normal operation of a circuit. Power switching devices include circuit breakers, load switches, disconnectors, grounding switches, fuses, and the like, which function to control and protect electrical equipment in a power system to ensure safe and reliable operation of the power system. The circuit breaker is used for opening or closing a circuit, the isolating switch is used for isolating the circuit, the load switch is used for controlling a switch of a load, the grounding switch is used for grounding the circuit, the combined electrical appliance is used for combining a plurality of electrical appliances, the lightning arrester is used for protecting electrical equipment from lightning stroke, the transformer is used for converting voltage and the like, and the common power switching device is mainly a circuit breaker structure and is mainly used for automatically opening the circuit to protect the electrical equipment when the circuit is short-circuited or overloaded.

The conventional power switch equipment mainly comprises two contacts and an interlocking device, the interlocking device is in a normal working state during normal use, the two contacts are in contact with each other at the moment, a circuit is switched on, when the circuit is overloaded or shorted, the current in the circuit is obviously increased, an electromagnet positioned in the device generates a certain magnetic field, and attracts an iron sheet in the device, so that the iron sheet bends to cause the contacts to separate and disconnect the circuit, the device can separate the two contacts at the first time, but the bending amplitude of the iron sheet is limited, when the current in the circuit is overlarge, even if the two contacts are not contacted any more, the circuit is not completely disconnected due to the existence of an electric arc, and therefore, how to separate the two contacts by a larger distance to rapidly disconnect the circuit during circuit abnormality is important.

The power switching equipment used at present mainly adopts the contact mode to realize the break-make of circuit, but because the heavy current can produce certain electric arc at the metal surface, can produce a large amount of electric arcs promptly at the spaced moment of two contacts, can adopt the explosion chamber in prior art to carry out the extinction of electric arc to the extinction of auxiliary arc through being filled with shielding gas in the inside of explosion chamber, but the volume of explosion chamber is limited, when the electric current is too big, is limited by the explosion chamber volume and leads to the arc extinguishing time longer, has certain security risk.

Disclosure of Invention

The present invention is directed to a power switching device that solves the above-mentioned problems of the related art.

In order to achieve the above object, the present invention provides the following technical solutions: the utility model provides a switching device for electric power, includes insulating housing, the left and right sides on insulating housing inner chamber top all is equipped with first terminal, the left and right sides on insulating housing inner chamber bottom all is equipped with the second terminal, the equal fixed mounting of one end that first terminal and second terminal kept away from relatively has the metal ripple pole, two the equal fixed mounting of one end that the metal ripple pole kept away from relatively has binding post, binding post's the other end runs through insulating housing's one end and is located insulating housing's upper and lower both ends, the rear end between first terminal and the second terminal is equipped with the fly leaf that is located insulating housing inside, insulating housing's rear end fixed has break away from the subassembly, break away from being connected between subassembly and the fly leaf, fly leaf front end fixed mounting has the extension pole, the front end of extension pole runs through insulating housing's front end, the explosion chamber that is located one side between first terminal and the second terminal is all installed to the left and right sides of insulating housing inner chamber front end, first terminal and second terminal all can relative insulating housing displacement from top to bottom.

When in actual use, the upper wiring terminal, the lower wiring terminal and the circuit are connected through the device, namely the device is connected in series to the circuit for on-off control of the circuit, meanwhile, cooling liquid in the separation assembly is required to be ensured to be at a reasonable level, when the circuit is connected, the upper wiring terminal, the lower wiring terminal, the first wiring terminal and the second wiring terminal are in contact with each other, and current can be communicated through the first wiring terminal and the second wiring terminal, so that transmission of current is completed.

As a further technical scheme of the invention, the separation assembly comprises an air storage chamber, the bottom end of the air storage chamber is connected with the back surface of the insulating shell, the top end of the air storage chamber is fixedly communicated with a communicating pipe, and the other end of the communicating pipe is fixedly communicated with a temporary storage pipe.

As a further technical scheme of the invention, an electromagnetic valve is arranged in the communicating pipe, the air storage chamber is filled with cooling liquid, the bottom end of the temporary storage pipe penetrates through the back surface of the insulating shell and is embedded with the insulating shell, and a piston plate is movably sleeved in the temporary storage pipe.

As a further technical scheme of the invention, a piston rod is fixedly arranged at the front end of the piston plate, the piston rod penetrates through the front end of the temporary storage pipe and is connected with the middle part of the back surface of the movable plate, a reset spring is movably sleeved on the outer side surface of the piston rod, and the upper end and the lower end of the reset spring are respectively connected with the back surface of the movable plate and one end of the temporary storage pipe.

According to the invention, as a further technical scheme, the back of the air storage chamber is fixedly provided with the tact switch, the tact switch penetrates through the back of the insulating shell and is positioned in the insulating shell, the output end of the tact switch is connected with the input end of the electromagnetic valve, the disengaging assembly further comprises an electromagnet positioned at one side of the tact switch, the electromagnet is connected with the inner side surface of the insulating shell and is connected with a circuit through a wire, the top end of the electromagnet is provided with a thin iron sheet, and when the electromagnet is started, bao Tiepian is bent and is contacted with the tact switch.

When the circuit is abnormal, namely overload or the circuit occurs, the current in the circuit is suddenly increased in a short time, the electromagnet is subjected to the current to generate a magnetic field and attractive force is generated on the thin iron sheet, the thin iron sheet is bent under the action of the magnetic field until one end of the thin iron sheet is contacted with the tact switch, the electromagnetic valve positioned in the communicating pipe is started, cooling liquid positioned in the air storage chamber enters the temporary storage pipe through the communicating pipe, acting force is applied to the piston plate in the temporary storage pipe to drive the piston plate to move forwards, the piston plate and the piston rod move forwards, the reset spring is stretched, and the movable plate moves forwards, so that power transmission is completed.

As a further technical scheme of the invention, the upper side and the lower side of the movable plate far away from one end of the separation assembly are fixedly provided with the first fixing seat, one side of the first fixing seat far away from the movable plate is movably connected with the connecting rod through the rotating shaft, and one end of the connecting rod far away from the first fixing seat is movably connected with the second fixing seat through the rotating shaft.

As a further technical scheme of the invention, one end of the second fixing seat is fixedly provided with a mounting sleeve, and the upper mounting sleeve and the lower mounting sleeve are respectively fixedly sleeved with the first binding post and the second binding post.

When the movable plate moves forwards, the first fixing seat at one end of the movable plate is acted by force, the connecting rod deflects along with the force, the included angle between the two connecting rods is increased, namely the two connecting rods are mutually far away, the mounting sleeves at one end of the two connecting rods are relatively far away, namely the corresponding first binding post and the corresponding second binding post are driven to be relatively far away, the metal corrugated rod is shortened, the first binding post and the second binding post are separated along with the moving plate until the piston plate moves to the top end of the inner cavity of the temporary storage tube, the disengaging assembly is at the limit position, the first binding post and the second binding post are also at the maximum spacing state, the circuit is disconnected along with the moving plate, otherwise, the thin iron sheet is not bent any more when the circuit returns to be normal, the tact switch is not connected, the cooling liquid in the temporary storage tube returns to the air storage chamber under the reset action, and meanwhile, the movable plate returns to the initial state, and the first binding post and the second binding post are relatively close until contacting with each other, so that the circuit is closed.

The electromagnetic attraction circuit breaker is utilized in a way of opening and closing the circuit by adopting the electromagnetic attraction, the electromagnetic attraction is used as a switch to trigger the opening of the electromagnetic valve, the power transmission is realized by the flowing of liquid as pressure, the large-range mechanical action is realized by the pressure action, the two contacts are directly opened by the mechanical action to realize the circuit opening, and in the whole opening process, the arc elongation range is large due to the large interval between the two contacts, the problem that the circuit opening is slow due to the small interval between the contacts of the traditional device can be effectively avoided, the quick opening of the circuit can be realized, and the safety is improved.

As a further technical scheme of the invention, the left side and the right side of the movable plate far from one end of the separation assembly are fixedly provided with extension frames, the upper end and the lower end of each extension frame are fixedly provided with cleaning brushes, and when the separation assembly is in a complete separation state, one end of each cleaning brush is contacted with one end of the first binding post or one end of the second binding post.

When the circuit takes place to break under the effect of device, owing to the displacement forward of fly leaf this moment, the fly leaf can drive the extension frame forward displacement in step this moment, simultaneously under the effect of fly leaf, interval between first terminal and the second terminal increases and keep away from each other, when interval between first terminal and the second terminal is in the limit value, the cleaning brush that is located the upper and lower both ends of extension frame can contact with the one end that first terminal or second terminal are close to produce the friction between contact and first terminal and second terminal and carry out self-cleaning to the surface of first terminal and second terminal, and when the circuit is closed, the cleaning brush can follow fly leaf automatic re-setting and release the contact between first terminal or the second terminal.

Through utilizing traditional electromagnetic actuation's mode again, utilize the circuit to break off the motion of opportunity action automatic realization cleaning brush, and then make it and first terminal and second terminal between contact each other and rub, realize the self-cleaning to first terminal and second terminal surface, get rid of the oxide layer, reduce traditional device and use the back for a long time because the contact oxidation phenomenon that the electric arc effect leads to, the self-cleaning of contact when can realizing breaking off the circuit, can effectively reduce the maintenance number of times of device, and then improve the life of contact, improve the stability of device.

As a further technical scheme of the invention, the arc-extinguishing chamber is in a horn shape, arc-extinguishing gas is filled in the arc-extinguishing chamber, and an extension chamber is movably arranged on the inner side surface of the arc-extinguishing chamber.

As a further technical scheme of the invention, the extension chambers penetrate through the front surfaces of the insulating shells, connecting plates are fixedly arranged on the front surfaces of the two extension chambers, and the front ends of the extension rods are connected with the middle parts of the back surfaces of the connecting plates.

When the circuit is disconnected, the movable plate can synchronously drive the extension rod to move forwards at the moment, the connecting plate can be pushed to move forwards at the moment, the extension chamber can be synchronously driven to move forwards when the connecting plate moves forwards, the extension chamber can move relative to the arc extinguishing chamber at the moment, the distance between the arc extinguishing chamber and the extension chamber is increased along with the increase of the distance between the arc extinguishing chamber and the extension chamber, namely the overlapping space of the arc extinguishing chamber and the extension chamber is increased along with the increase of the distance, and when the first binding post and the second binding post are separated, an arc generated at the moment can be guided into the extension chamber through the arc extinguishing chamber and is consumed in the increased space until the arc is completely extinguished.

Through utilizing the mechanical action when carrying out circuit disconnection earlier stage, through the displacement forward of fly leaf, realize the displacement of extension room relative explosion chamber to increase the space that electric arc consumed through the space that increases, make electric arc burning more rapid, accelerate the time that electric arc burnt, and then reduce the arc extinguishing time, avoid traditional device limited and the volume of explosion chamber to lead to the longer problem of arc extinguishing time, the security is better, is fit for using in the heavy-duty circuit.

The beneficial effects of the invention are as follows:

1. the invention utilizes the traditional circuit breaker by adopting the electromagnetic attraction circuit breaking mode, realizes the opening of the electromagnetic valve by only utilizing the electromagnetic attraction as the switch trigger, realizes the power transmission by taking the flow of liquid as the pressure, realizes the larger-range mechanical action by the pressure action, directly breaks two contacts by the mechanical action to realize the circuit breaking, and can effectively avoid the problem of slow circuit breaking caused by the smaller interval of the contacts of the traditional device due to larger interval of the two contacts in the whole breaking process.

2. According to the invention, mechanical actions during circuit breaking in the early stage are utilized, the displacement of the extension chamber relative to the arc extinguishing chamber is realized through forward displacement of the movable plate, and the space consumed by the arc is increased through the increased space, so that the arc burns more rapidly, the time of arc burning is accelerated, the arc extinguishing time is further shortened, the problem that the arc extinguishing time is longer due to the fact that the traditional device is limited by the volume of the arc extinguishing chamber is avoided, the safety is better, and the device is suitable for being used in a large-load circuit.

3. According to the invention, the traditional electromagnetic attraction mode is utilized again, the motion of the cleaning brush is automatically realized by utilizing the mechanical action of the circuit disconnection, and then the cleaning brush is contacted with the first binding post and the second binding post and rubbed with the first binding post and the second binding post, so that the surfaces of the first binding post and the second binding post are automatically cleaned, the oxide layer is removed, the contact oxidation phenomenon caused by the arc effect after the traditional device is used for a long time is reduced, the automatic cleaning of the contact during circuit disconnection can be realized, the maintenance times of the device can be effectively reduced, the service life of the contact is further prolonged, and the stability of the device is improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a top view of the overall structure of the present invention;

FIG. 3 is a schematic cross-sectional view of the internal structure of the present invention;

fig. 4 is a schematic cross-sectional view of the arc chute and extension chamber structure of the present invention;

FIG. 5 is a schematic view of the present invention with the insulating housing hidden;

FIG. 6 is a schematic diagram showing the mating of the first terminal and the second terminal of the present invention;

FIG. 7 is an isolated schematic view of the structure of the disengaging assembly of the present invention;

fig. 8 is an enlarged schematic view of the structure at a in fig. 6.

In the figure: 1. an insulating housing; 2. a first terminal; 3. a second binding post; 4. an extension rod; 5. a movable plate; 6. a first fixing seat; 7. the second fixing seat; 8. a connecting rod; 9. a mounting sleeve; 10. a metal corrugated rod; 11. a connection terminal; 12. an extension rack; 13. a cleaning brush; 14. a disengagement assembly; 141. an air storage chamber; 142. a communicating pipe; 143. a temporary storage tube; 144. a piston plate; 145. a piston rod; 146. a return spring; 147. touching the switch; 148. an electromagnet; 149. bao Tiepian; 15. an arc extinguishing chamber; 16. an extension chamber; 17. and (5) connecting a plate.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 to 8, in an embodiment of the present invention, a switch device for electric power includes an insulating housing 1, a first binding post 2 is disposed on both left and right sides of a top end of an inner cavity of the insulating housing 1, a second binding post 3 is disposed on both left and right sides of a bottom end of the inner cavity of the insulating housing 1, metal corrugated rods 10 are fixedly mounted at both ends of the first binding post 2 and the second binding post 3, a connection terminal 11 is fixedly mounted at both ends of the two metal corrugated rods 10, the other ends of the connection terminal 11 penetrate through one end of the insulating housing 1 and are located at both upper and lower ends of the insulating housing 1, a movable plate 5 located inside the insulating housing 1 is disposed at a rear end between the first binding post 2 and the second binding post 3, a detachment assembly 14 is fixedly mounted at a rear end of the insulating housing 1, the detachment assembly 14 is connected with the movable plate 5, an extension rod 4 is fixedly mounted at a front end of the movable plate 5, an arc extinguishing chamber 15 located at one side between the first binding post 2 and the second binding post 3 is mounted at both left and right sides of the front end of the inner cavity of the insulating housing 1, and the first binding post 2 and the second binding post 3 can be displaced relatively up and down.

When in actual use, the upper wiring terminal 11 and the lower wiring terminal 11 are connected with a circuit through the connecting device, namely the connecting device is connected in series to the circuit for controlling the on-off of the circuit, meanwhile, the cooling liquid in the disengaging assembly 14 is required to be ensured to be at a reasonable level, when the circuit is connected, the upper wiring terminal 2 and the lower wiring terminal 3 are in contact with each other, and the current can be communicated through the first wiring terminal 2 and the second wiring terminal 3, so that the transmission of the current is completed.

As shown in fig. 1 and 4 and fig. 5 and 7, the disengaging assembly 14 comprises an air storage chamber 141, the bottom end of the air storage chamber 141 is connected with the back surface of the insulating housing 1, the top end of the air storage chamber 141 is fixedly communicated with a communicating pipe 142, the other end of the communicating pipe 142 is fixedly communicated with a temporary storage pipe 143, an electromagnetic valve is installed inside the communicating pipe 142, the air storage chamber 141 is filled with cooling liquid, the bottom end of the temporary storage pipe 143 penetrates through the back surface of the insulating housing 1 and is embedded between the insulating housing 1, a piston plate 144 is movably sleeved inside the temporary storage pipe 143, a piston rod 145 is fixedly arranged at the front end of the piston plate 144, the piston rod 145 penetrates through the front end of the temporary storage pipe 143 and is connected with the middle part of the back surface of the movable plate 5, a reset spring 146 is movably sleeved on the outer side surface of the piston rod 145, the upper end and the lower end of the reset spring 146 are respectively connected with the back surface of the movable plate 5 and one end of the temporary storage pipe 143, a light touch switch 147 is fixedly installed on the back surface of the air storage chamber 141, the light touch switch 147 penetrates through the back surface of the insulating housing 1 and is located inside the insulating housing 1, the output end of the light switch 147 is connected with the input end of the electromagnetic valve, the disengaging assembly 14 further comprises an electromagnet 148, when the electromagnet 148 is in contact with the electromagnet 148, the electromagnet 148 is in contact with the electromagnet circuit 148, and when the electromagnet is in contact with the electromagnet, and the electromagnet is in contact with the electromagnet.

When the circuit is abnormal, namely overload or circuit occurs, the current in the circuit is suddenly increased in a short time, the electromagnet 148 is subjected to the current to generate a magnetic field and attractive force is generated on the thin iron sheet 149, the Bao Tiepian is subjected to the magnetic field to bend until one end of the thin iron sheet 149 contacts with the tact switch 147, the electromagnetic valve positioned in the communicating pipe 142 is started, the cooling liquid positioned in the air storage chamber 141 subsequently enters the temporary storage pipe 143 through the communicating pipe 142, the piston plate 144 in the temporary storage pipe 143 is driven to move forwards by applying the acting force to the piston plate 144, the piston rod 145 moves forwards along with the piston plate 144, the return spring 146 is stretched, and the movable plate 5 moves forwards along with the piston plate, so that power transmission is completed.

As shown in fig. 4, 5 and 6, the upper and lower sides of the end of the movable plate 5 far away from the separation component 14 are fixedly provided with a first fixing seat 6, one side of the first fixing seat 6 far away from the movable plate 5 is movably connected with a connecting rod 8 through a rotating shaft, one end of the connecting rod 8 far away from the first fixing seat 6 is movably connected with a second fixing seat 7 through the rotating shaft, one end of the second fixing seat 7 is fixedly provided with a mounting sleeve 9, and the upper and lower mounting sleeves 9 are fixedly sleeved with the first binding post 2 and the second binding post 3 respectively.

When the movable plate 5 moves forwards, the first fixing seat 6 at one end of the movable plate 5 is acted by force, the connecting rod 8 deflects along with the first fixing seat, the included angle between the two connecting rods 8 is increased, namely, the two connecting rods 8 are far away from each other, the mounting sleeve 9 at one end of the two connecting rods 8 is relatively far away from each other, namely, the corresponding first binding post 2 and the corresponding second binding post 3 are driven to be relatively far away, the metal corrugated rod 10 is shortened, the first binding post 2 and the second binding post 3 are separated along with the moving plate, until the piston plate 144 moves to the top end of the inner cavity of the temporary storage tube 143, the disengaging assembly 14 is in the limit position, the first binding post 2 and the second binding post 3 are also in the maximum spacing state, the circuit is disconnected along with the maximum spacing state, otherwise, the thin iron plate 149 is not bent any more when the circuit is recovered normally, the light touch switch 147 is not turned on, the cooling liquid in the temporary storage tube 143 is returned to the inside the air storage chamber 141 under the reset action, the movable plate 5 is recovered to the initial state, and the first binding post 2 and the second binding post 3 are relatively close to each other until the circuit is contacted with each other, and the circuit is closed.

As shown in fig. 6 and 8, extension frames 12 are fixedly mounted on the left and right sides of one end of the movable plate 5 far from the disengaging assembly 14, cleaning brushes 13 are fixedly mounted on the upper and lower ends of the extension frames 12, and when the disengaging assembly 14 is in a completely disengaged state, one end of each cleaning brush 13 is in contact with one end of the first binding post 2 or one end of the second binding post 3.

When the circuit is disconnected under the effect of the device, at this moment, because the movable plate 5 moves forward, the movable plate 5 can synchronously drive the extension frame 12 to move forward, meanwhile, under the effect of the movable plate 5, the distance between the first binding post 2 and the second binding post 3 is increased and is far away from each other, when the distance between the first binding post 2 and the second binding post 3 is at a limit value, the cleaning brushes 13 positioned at the upper end and the lower end of the extension frame 12 can be contacted with one end of the first binding post 2 or the second binding post 3, which is close to each other, and friction is generated between the cleaning brushes and the first binding post 2 and the second binding post 3 before the contact so as to automatically clean the surfaces of the first binding post 2 and the second binding post 3, and when the circuit is closed, the cleaning brushes 13 can automatically reset along with the movable plate 5 to release the contact between the cleaning brushes and the first binding post 2 or the second binding post 3.

Through utilizing traditional electromagnetic actuation's mode again, utilize the circuit to break off the motion of opportunity action automatic realization cleaning brush 13, and then make it and first terminal 2 and second terminal 3 between contact each other and rub, realize the self-cleaning to first terminal 2 and second terminal 3 surface, get rid of the oxide layer, reduce traditional device and use the back for a long time because the contact oxidation phenomenon that the electric arc effect leads to, the self-cleaning of contact when can realize breaking the circuit, can effectively reduce the maintenance number of times of device, and then improve the life of contact, improve the stability of device.

As shown in fig. 1, 2 and 4, the arc extinguishing chamber 15 is horn-shaped, arc extinguishing gas is filled in the arc extinguishing chamber 15, the arc extinguishing gas can be sulfur hexafluoride gas, an extension chamber 16 is movably mounted on the inner side surface of the arc extinguishing chamber 15, the extension chamber 16 penetrates through the front surface of the insulating shell 1, connecting plates 17 are fixedly mounted on the front surfaces of the two extension chambers 16, and the front ends of the extension rods 4 are connected with the middle parts of the back surfaces of the connecting plates 17.

When the circuit is disconnected, the movable plate 5 can synchronously drive the extension rod 4 to move forwards at the moment, the connecting plate 17 can be pushed to move forwards at the moment, the extension chamber 16 can be synchronously driven to move forwards at the moment when the connecting plate 17 moves forwards, the extension chamber 16 can move relative to the arc extinguishing chamber 15 at the moment, the distance between the arc extinguishing chamber 15 and the extension chamber 16 is increased, namely the overlapping space of the arc extinguishing chamber 15 and the extension chamber 16 is increased, and when the first binding post 2 and the second binding post 3 are separated, the generated arc can be guided by the arc extinguishing chamber 15 and enter the extension chamber 16 and is consumed in the increased space until the arc is completely extinguished.

Through utilizing the mechanical action when carrying out circuit disconnection earlier stage, realize the displacement of extension room 16 relative explosion chamber 15 through the forward displacement of fly leaf 5 to increase the space that electric arc consumed through the space that increases, make electric arc burning more rapid, accelerate the time that electric arc burnt, and then reduce the arc extinguishing time, avoid traditional device limited and the volume of explosion chamber 15 to lead to the longer problem of arc extinguishing time, the security is better, is fit for using in the heavy load circuit.

Working principle and using flow:

when the circuit is abnormal, namely overload or circuit occurs, the current in the circuit is suddenly increased in a short time, the electromagnet 148 is subjected to the current to generate a magnetic field and generate attractive force to the thin iron sheet 149, the Bao Tiepian is subjected to the magnetic field to bend until one end of the thin iron sheet 149 contacts with the tact switch 147, the electromagnetic valve positioned in the communicating pipe 142 is started, the cooling liquid positioned in the air storage chamber 141 subsequently enters the temporary storage pipe 143 through the communicating pipe 142, the piston plate 144 in the temporary storage pipe 143 is driven to move forwards by applying an acting force to the piston plate 144, the piston rod 145 moves forwards along with the piston plate 144, the return spring 146 is stretched, and the movable plate 5 moves forwards along with the piston plate, so that power transmission is completed;

when the movable plate 5 moves forwards, the first fixing seat 6 at one end of the movable plate 5 is acted by force, the connecting rod 8 deflects along with the first fixing seat, the included angle between the two connecting rods 8 is increased, namely the two connecting rods 8 are far away from each other, the mounting sleeve 9 at one end of the two connecting rods 8 is relatively far away from each other, namely the corresponding first binding post 2 and the corresponding second binding post 3 are driven to be relatively far away, the metal corrugated rod 10 is shortened, the first binding post 2 and the second binding post 3 are separated along with the first binding post, the separation assembly 14 is at the limit position until the piston plate 144 moves to the top end of the inner cavity of the temporary storage tube 143, the first binding post 2 and the second binding post 3 are also at the maximum distance state, the circuit is disconnected along with the separation, otherwise, the thin iron sheet 149 is not bent any more when the circuit is recovered to be normal, the switch 147 is not switched on, the cooling liquid in the temporary storage tube 143 is returned to the inside the air storage chamber 141 under the reset action, the movable plate 5 is recovered to the initial state, and the first binding post 2 and the second binding post 3 are relatively close to each other until the circuit is contacted with each other, and the circuit is closed;

when the circuit is disconnected under the action of the device, at the moment, due to the forward displacement of the movable plate 5, the movable plate 5 can synchronously drive the extension frame 12 to move forward, meanwhile, under the action of the movable plate 5, the distance between the first binding post 2 and the second binding post 3 is increased and is far away from each other, when the distance between the first binding post 2 and the second binding post 3 is at a limit value, the cleaning brushes 13 positioned at the upper end and the lower end of the extension frame 12 can be contacted with one end of the first binding post 2 or the second binding post 3, which is close to each other, friction is generated between the cleaning brushes and the first binding post 2 and the second binding post 3 before the contact so as to automatically clean the surfaces of the first binding post 2 and the second binding post 3, and when the circuit is closed, the cleaning brushes 13 can automatically reset along with the movable plate 5 so as to release the contact between the cleaning brushes and the first binding post 2 or the second binding post 3;

Claims

1. An electrical switching apparatus comprising an insulating housing (1), characterized in that: the left and right sides on the top end of the inner cavity of the insulating shell (1) are respectively provided with a first binding post (2), the left and right sides on the bottom end of the inner cavity of the insulating shell (1) are respectively provided with a second binding post (3), one ends, far away from each other, of the first binding post (2) and the second binding post (3) are respectively fixedly provided with a metal corrugated rod (10), one ends, far away from each other, of the two metal corrugated rods (10) are respectively fixedly provided with a binding post (11), the other ends of the binding posts (11) penetrate through one end of the insulating shell (1) and are positioned at the upper end and the lower end of the insulating shell (1), the rear end between the first binding post (2) and the second binding post (3) is provided with a movable plate (5) positioned inside the insulating housing (1), the rear end of the insulating housing (1) is fixedly provided with a disengaging assembly (14), the disengaging assembly (14) is connected with the movable plate (5), the front end of the movable plate (5) is fixedly provided with an extension rod (4), the front end of the extension rod (4) penetrates through the front end of the insulating housing (1), the left side and the right side of the front end of the inner cavity of the insulating housing (1) are respectively provided with an arc extinguishing chamber (15) positioned at one side between the first binding post (2) and the second binding post (3), the first binding post (2) and the second binding post (3) can move up and down relative to the insulating shell (1).

2. A switching device for electric power according to claim 1, characterized in that: the separation assembly (14) comprises an air storage chamber (141), the bottom end of the air storage chamber (141) is connected with the back surface of the insulating shell (1), the top end of the air storage chamber (141) is fixedly communicated with a communicating pipe (142), and the other end of the communicating pipe (142) is fixedly communicated with a temporary storage pipe (143).

3. A switching device for electric power according to claim 2, characterized in that: the inside of communicating pipe (142) is installed the solenoid valve, the inside of gas receiver (141) is filled with the coolant liquid, the bottom of temporary storage pipe (143) runs through the back of insulating housing (1) and inlay the installation between insulating housing (1), piston board (144) have been cup jointed in the inside activity of temporary storage pipe (143).

4. A switching device for electric power according to claim 3, characterized in that: the front end of the piston plate (144) is fixedly provided with a piston rod (145), the piston rod (145) penetrates through the front end of the temporary storage tube (143) and is connected with the middle of the back of the movable plate (5), the outer side surface of the piston rod (145) is movably sleeved with a reset spring (146), and the upper end and the lower end of the reset spring (146) are respectively connected with the back of the movable plate (5) and one end of the temporary storage tube (143).

5. A switching device for electric power according to claim 3, characterized in that: the utility model discloses a gas receiver, including gas receiver (141) back fixed mounting has and dabs switch (147), dabs the back of switch (147) and be located the inside of insulating housing (1), the output of dab switch (147) is connected with the input of solenoid valve, break away from subassembly (14) still including being located the electro-magnet (148) of dab switch (147) one side, electro-magnet (148) are connected with the medial surface of insulating housing (1) and are connected with the circuit through the wire, bao Tiepian (149) are installed on the top of electro-magnet (148), when electro-magnet (148) start, bao Tiepian (149) crooked and contact with dab switch (147).

6. A switching device for electric power according to claim 1, characterized in that: the movable plate (5) is kept away from the upper and lower both sides of breaking away from subassembly (14) one end and is all fixed mounting have first fixing base (6), one side that movable plate (5) was kept away from to first fixing base (6) has connecting rod (8) through pivot swing joint, one end that first fixing base (6) was kept away from to connecting rod (8) has second fixing base (7) through pivot swing joint.

7. The electrical switching apparatus of claim 6 wherein: one end of the second fixing seat (7) is fixedly provided with a mounting sleeve (9), and the upper mounting sleeve and the lower mounting sleeve (9) are fixedly sleeved with the first binding post (2) and the second binding post (3) respectively.

8. A switching device for electric power according to claim 1, characterized in that: the movable plate (5) is kept away from the left and right sides that breaks away from subassembly (14) one end and is all fixed mounting has extension frame (12), the upper and lower both ends of extension frame (12) are all fixed mounting has cleaning brush (13), when breaking away from subassembly (14) and being in the complete state of breaking away from, the one end of cleaning brush (13) contacts with the one end of first terminal (2) or the one end of second terminal (3).

9. A switching device for electric power according to claim 1, characterized in that: the arc extinguishing chamber (15) is horn-shaped, arc extinguishing gas is filled in the arc extinguishing chamber (15), and an extension chamber (16) is movably mounted on the inner side surface of the arc extinguishing chamber (15).

10. A switching device for electric power according to claim 9, characterized in that: the extension chambers (16) penetrate through the front face of the insulating shell (1), connecting plates (17) are fixedly arranged on the front faces of the two extension chambers (16), and the front ends of the extension rods (4) are connected with the middle parts of the back faces of the connecting plates (17).