CN216015193U - Operating mechanism for lever type quick change-over switch - Google Patents
Operating mechanism for lever type quick change-over switch Download PDFInfo
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- CN216015193U CN216015193U CN202122224368.4U CN202122224368U CN216015193U CN 216015193 U CN216015193 U CN 216015193U CN 202122224368 U CN202122224368 U CN 202122224368U CN 216015193 U CN216015193 U CN 216015193U
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Abstract
The utility model relates to a lever is operating mechanism for quick change over switch, when the main power supply is normal, the main vacuum interrupter who is connected with main operating mechanism unit keeps normally closed state. When the main power supply has a voltage sag fault, the main operating mechanism unit enables the main vacuum arc-extinguishing chamber to be disconnected through electromagnetic repulsion, and meanwhile, the auxiliary vacuum arc-extinguishing chamber connected with the auxiliary operating mechanism is closed through the lever unit, so that the standby power supply is switched on, and the seamless switching from the main power supply to the standby power supply is achieved. When the main power supply is recovered to be normal, the auxiliary operating mechanism unit enables the auxiliary vacuum arc-extinguishing chamber to be disconnected through electromagnetic repulsion, and meanwhile, the main vacuum arc-extinguishing chamber connected with the main operating mechanism is closed through the lever unit, so that the main power supply is switched on, and therefore seamless switching from the standby power supply to the main power supply is achieved. The mechanism realizes the design of the shunt circuit of the quick change-over switch operating mechanism and improves the reliability of the opening and closing of the quick change-over switch.
Description
Technical Field
The utility model relates to a lever is operating mechanism for quick change over switch belongs to quick change over switch operating mechanism field.
Background
With the rapid development of social economy and the continuous construction of infrastructure, the influence of power supply interruption on the current economy is great, and control signals such as important traffic hubs and important communication hubs are disordered when power is cut off, so that the society is seriously disordered, and even personal safety is damaged. Therefore, a building with a higher power supply level needs to be capable of providing sufficient power under normal conditions, and also needs to have sufficient standby power when a power supply used normally fails, so that the reliable operation of the system is ensured. Therefore, fast safe switching of the main-standby power is extremely important.
As the capacity of the main-standby power supply system continuously increases and the voltage level continuously increases, the speed index of the main-standby power supply changeover switch also continuously increases. Conventional mechanical switches are widely used in dual power supply systems, and the switching time takes hundreds of milliseconds to several seconds. When long-time fault interruption occurs, the method is an effective countermeasure, and when voltage sag fault occurs to sensitive loads such as equipment which is precisely machined and uses a microprocessor as a control management system, high-intensity gas discharge lamps such as a high-pressure mercury lamp and a high-pressure sodium lamp, power supply switching must be carried out within tens of milliseconds to ensure normal operation of the equipment. Switching of a conventional mechanical switch in tens of milliseconds is impossible. For a solid-state change-over switch adopting a semiconductor device, the switch device is in a conducting state for a long time during operation, and the on-state energy consumption is not negligible; the solid-state current limiter needs to be connected in series by multiple modules to resist transient overvoltage of a system, has poor reliability and needs to be maintained regularly. The vacuum fast change-over switch based on the fast repulsion mechanism is small in size, free of maintenance, free of fire and explosion hazards, the on-off time can be less than 5ms, the traditional mechanical switch can be replaced perfectly, and the requirement of sensitive loads on high reliability of fast change-over power supply is met. However, the operating mechanism of the fast change-over switch has high requirements, the traditional operating mechanism is difficult to meet the speed requirement, and the research on the novel operating mechanism with the fast action capability becomes the current research hotspot. At present, the quick change-over switch based on the electromagnetic repulsion operating mechanism is mostly in the stages of theoretical research and principle prototype, no reliable engineering application case exists, and the development and the use of the quick change-over switch are seriously influenced.
SUMMERY OF THE UTILITY MODEL
Purpose of the utility model
The utility model aims at providing a lever is operating mechanism for quick change over switch, when the main power supply is normal promptly, the main vacuum interrupter who is connected with main operating mechanism unit keeps normally closed state. When the main power supply has a voltage sag fault, the main operating mechanism unit enables the main vacuum arc-extinguishing chamber to be disconnected through electromagnetic repulsion force to realize the opening of the main power supply, and meanwhile, the auxiliary vacuum arc-extinguishing chamber connected with the auxiliary operating mechanism is closed through the lever unit to realize the closing of the standby power supply, so that the seamless switching from the main power supply to the standby power supply is realized. When the main power supply is recovered to be normal, the auxiliary operating mechanism unit enables the auxiliary vacuum arc-extinguishing chamber to be disconnected through electromagnetic repulsion force, the brake of the standby power supply is achieved, meanwhile, the main vacuum arc-extinguishing chamber connected with the main operating mechanism is closed through the lever unit, the main power supply is switched on, and therefore seamless switching from the standby power supply to the main power supply is achieved. The mechanism realizes the design of a shunt circuit of the quick change-over switch operating mechanism, more accurate control on the opening and closing retaining force of the change-over switch operating mechanism, improves the reliability of the opening and closing of the quick change-over switch, realizes the synchronous operation of the opening and closing through a lever, achieves the quick switching of a main power supply and a standby power supply, and further improves the reliability of a power supply system.
Technical scheme
In a first aspect, an embodiment of the present invention provides an operating mechanism for a lever-type fast switch, including a main operating mechanism unit, an auxiliary operating mechanism unit, and a lever unit;
the main operating mechanism unit is connected with the auxiliary operating mechanism through a lever unit, wherein the main operating mechanism unit is arranged at the left side, and the auxiliary operating mechanism unit is arranged at the right side; the lever unit is driven by the main operating mechanism unit to realize downward movement of the left end, and when the left end of the lever unit moves downwards to a certain position, the auxiliary operating mechanism unit applies upward holding force to the right end of the lever unit; or the right end of the lever unit moves downwards under the driving of the auxiliary operating mechanism unit, and when the right end of the lever unit moves downwards to a certain position, the main operating mechanism unit applies upward holding force to the left end of the lever unit.
Further, the main operating mechanism unit includes a first electromagnetic repulsion pushing unit, a first connecting rod and a first permanent magnet holding unit;
wherein the first electromagnetic repulsion force pushing unit and the first permanent magnet holding unit are coaxially connected through the first connecting rod.
Further, the first electromagnetic repulsion pushing unit includes a first switching coil disc, a first metal repulsion disc and a first support member.
The first opening coil disc and the first metal repulsion disc are of an up-and-down structure and are coaxially connected through the first connecting rod; the first switching coil disc is connected with the first permanent magnet holding unit through the first supporting piece and is spaced by a first distance.
Further, the first permanent magnet holding unit comprises a first movable iron core, a first holding unit shell, a first permanent magnet, a first magnetic conduction ring and a first base.
The first movable iron core is fixed on the first connecting rod; the first base is arranged above the inner bottom surface of the first holding unit shell; the first permanent magnet is placed in the first holding unit shell and adsorbed on the inner side face of the first holding unit shell; the first magnetic conductive ring is adsorbed on the inner side surface of the first permanent magnet; the first holding unit shell, the first permanent magnet and the first magnetic conduction ring are coaxial.
Further, the auxiliary operating mechanism unit comprises a second electromagnetic repulsion pushing unit, a second connecting rod and a second permanent magnet holding unit;
the second electromagnetic repulsion force pushing unit and the second permanent magnet holding unit are coaxially connected through a second connecting rod.
Further, the second electromagnetic repulsion pushing unit includes a second switching coil disc, a second metal repulsion disc and a second support member.
The second opening coil disc and the second metal repulsion disc are in an up-and-down structure and are coaxially connected through the second connecting rod; the second switching coil disc is connected with the second permanent magnet holding unit through the second supporting piece and is spaced by a first distance.
Further, the second permanent magnet holding unit of the auxiliary operating mechanism unit includes a second movable iron core, a second holding unit casing, a second permanent magnet, a second magnetic conductive ring, and a second base.
The second movable iron core is fixed on the second connecting rod; the second base is arranged above the inner bottom surface of the second holding unit shell; the second permanent magnet is placed in the second holding unit shell and adsorbed on the inner side face of the second holding unit shell; the second magnetic conductive ring is adsorbed on the inner side surface of the second permanent magnet; the second holding unit shell, the second permanent magnet and the second magnetic conduction ring are coaxial.
Further, the lever unit comprises a lever and a bracket;
the left end of the lever is connected with the main operating mechanism unit; the right end of the lever is connected with the auxiliary operating mechanism unit; the middle position of the lever is fixed by the bracket.
Further, the first base is made of a non-metallic material.
Further, the second base is made of a non-metallic material.
Compared with the prior art, the embodiment of the utility model provides a high lever operating mechanism for quick change over switch of reliability can realize the design of shunt circuit, can realize the independent regulation of change over switch divide-shut brake holding power, has reduced the combined floodgate bounce at the combined floodgate in-process, makes the whole mechanism obtain improving at combined floodgate in-process reliability, has realized main-stand-by power supply's fast switch-over simultaneously, has further improved dual power supply system reliability.
Drawings
Fig. 1 is a schematic structural view of an operating mechanism for a lever-type fast switch according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an operating mechanism for a lever-type fast transfer switch according to an embodiment of the present invention;
the specific implementation mode is as follows:
the present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural view of an operating mechanism for a lever-type fast switch according to a first embodiment of the present invention, and as shown in fig. 1, the operating mechanism for the lever-type fast switch includes a main operating mechanism unit 1, a sub operating mechanism unit 2, and a lever unit three-part 3; the main operating mechanism unit 1 and the auxiliary operating mechanism unit 2 are connected through a lever unit 3, the main operating mechanism unit 1 is arranged at the left side, and the auxiliary operating mechanism unit 2 is arranged at the right side; the lever unit 3 is driven by the main operating mechanism unit 1 to move downwards at the lower left end, and when the left end of the lever unit 3 moves downwards to a certain position, the auxiliary operating mechanism unit 2 applies upward holding force to the right end of the lever unit 3; or, the lever unit 3 is driven by the auxiliary operating mechanism unit 2 to move downwards at the right end, and when the right end of the lever unit 3 moves downwards to a certain position, the main operating mechanism unit 1 applies upward holding force to the left end of the lever unit 3.
Further, with continued reference to fig. 1, the main operating mechanism unit 1 includes a first connecting rod 100, a first electromagnetic repulsive-force urging unit 200, a first permanent magnet holding unit 300; a circular hole is formed between the first electromagnetic repulsion pushing unit 200 and the first permanent magnet holding unit 300, and the two units are connected through a first connecting rod 100.
Further, with continued reference to fig. 1, the secondary operating mechanism unit 2 includes a second connecting rod 600, a second electromagnetic repulsive-force urging unit 700, and a second permanent magnet holding unit 800; a circular hole is formed between the second electromagnetic repulsion pushing unit 700 and the second permanent magnet holding unit 800, and the two units are connected through a second connecting rod 600.
Further, with continued reference to fig. 1, the lever unit 3 includes two parts, a lever 400 and a bracket 500; wherein, the left end of the lever 400 is connected with the main operating mechanism unit 1; the right end of the lever 400 is connected with the sub-operating mechanism unit 2; the lever 400 is fixed at a middle position by a bracket 500.
The operating mechanism has the advantages that the overall weight of the operating mechanism is light, the rapid change-over switch can provide enough holding force at the switching-on and switching-off positions, the contacts cannot be separated under the action of vibration or short-circuit current electric force, ablation of the contacts when the rapid change-over switch endures short-circuit current is avoided, in addition, the switching-on and switching-off of the main power supply and the switching-on and switching-off of the standby power supply are carried out simultaneously, and the seamless switching of the main power supply and the standby power supply is realized.
Fig. 2 is a schematic structural diagram of an operating mechanism for a lever-type fast switch according to an embodiment of the present invention, and as shown in fig. 2, the first electromagnetic repulsion pushing unit 200 includes a first brake coil disc 201, a first metal repulsion disc 202 and a first supporting member 203; wherein, the first opening coil plate 201 and the first metal repulsion plate 202 are in a vertical structure, and the two are connected through a first connecting rod 100; the first opening coil disc 201 is connected with the first permanent magnet holding unit 300 through the first support member 203 and is spaced by a first distance, the first distance needs to be determined according to the opening distance requirement of the arc extinguish chamber of the change-over switch, for example, if the change-over switch is 10kV, the distance is 19mm, and the size of the first distance is not limited in the present application; the first metal repulsive disc 202 is fixed to the first connecting rod 100; when a main power supply connected with the mechanism is opened, the first opening coil disc 201 is electrified, an eddy current effect is generated between the first opening coil disc 201 and the first metal repulsion disc 202, a downward repulsion force is generated between the first opening coil disc 201 and the first metal repulsion disc 202, the first connecting rod 100 and the first metal repulsion disc 202 are subjected to a downward acting force, and the first metal repulsion disc 202 drives the first connecting rod 100 to move downwards until the arc extinguish chamber opening position of the main power supply is reached, so that the main power supply is ensured to be successfully opened.
Further, with continued reference to fig. 2, the first permanent magnet holding unit 300 includes a first plunger 301, a first holding unit housing 302, a first permanent magnet 303, a first magnetic conductive ring 304, and a first base 305; wherein, the first movable iron core 301 is fixed on the first connecting rod 100; a first pedestal 305 is disposed above the bottom face of the first unit case 302; the first permanent magnet 303 is placed inside the first holding unit casing 302 and is adsorbed on the inner side surface of the first holding unit casing 302; the first magnetic conductive ring 304 is adsorbed on the inner side surface of the first permanent magnet 303; the first holding unit shell 302, the first permanent magnet 303 and the first magnetic conductive ring 304 are coaxial; the first base 305 is made of a non-metallic material; when the main power supply arc-extinguishing chamber connected with the mechanism is in the opening position, because the first base 305 is made of a material which can not conduct magnetism, a magnetic circuit formed by the first holding unit shell 302, the first permanent magnet 303, the first magnetic conduction ring 304 and the first movable iron core 301 is isolated by the first base 305, and therefore the first permanent magnet holding unit 300 at the position can not provide opening holding force for the main power supply arc-extinguishing chamber.
Further, with continued reference to fig. 2, the second electromagnetic repulsive-force urging unit 700 includes a second switching coil disc 701, a second metal repulsive disc 702, and a first support 703; the second switching coil plate 701 and the second metal repulsion plate 702 are in an up-and-down structure and are connected through a second connecting rod 600; the second shunt coil disc 701 is connected with the second permanent magnet holding unit 800 through the second support 703 and is spaced by a first distance, the first distance needs to be determined according to the requirement of the opening distance of the arc extinguish chamber of the change-over switch, for example, if the change-over switch is 10kV, the distance is 19mm, and the size of the first distance is not limited in the present application; the second metal repulsive plate 702 is fixed to the second link 600; when the standby power supply connected with the mechanism is switched off, the second switching coil disc 701 is electrified, an eddy current effect is generated between the second switching coil disc 701 and the second metal repulsion disc 702, a downward repulsion force is generated between the second switching coil disc 701 and the second metal repulsion disc 702, the second connecting rod 600 and the second metal repulsion disc 702 are subjected to a downward acting force, and the second metal repulsion disc 702 drives the second connecting rod 600 to move downwards until the switching-off position of an arc extinguish chamber of the standby power supply is reached, so that the standby power supply is ensured to be successfully switched off.
Further, with continued reference to fig. 2, the second permanent magnet holding unit 800 includes a second plunger 801, a second holding unit housing 802, a second permanent magnet 803, a second magnetic conductive ring 804, and a second base 805; the second movable iron core 801 is fixed on the second connecting rod 600; a second pedestal 805 is disposed above the bottom face of the second unit case 802; a second permanent magnet 803 is placed inside the second holding unit casing 802 and is adsorbed on the inner side surface of the second holding unit casing 802; the second magnetic conductive ring 804 is adsorbed on the inner side surface of the second permanent magnet 803; the second holding unit casing 802, the second permanent magnet 803 and the second magnetic conductive ring 804 are coaxial; the second base 805 is made of a non-metallic material; when the standby power supply arc-extinguishing chamber connected with the mechanism is in the opening position, the second base 805 is made of a material which can not conduct magnetism, so that a magnetic circuit formed by the second holding unit shell 802, the second permanent magnet 803, the second magnetic conduction ring 804 and the second movable iron core 801 is isolated by the second base 805, and therefore the second permanent magnet holding unit 800 at the position can not provide opening holding force for the standby power supply arc-extinguishing chamber.
When a main power supply has a voltage fault, a main power supply arc extinguish chamber of a quick change-over switch connected with the mechanism is switched off, a first switching coil disc 201 is electrified, an eddy current effect is generated between the first switching coil disc 201 and a first metal repulsion disc 202, a downward repulsion force is generated between the first switching coil disc 201 and the first metal repulsion disc 202, a first connecting rod 100 and the first metal repulsion disc 202 are subjected to a downward acting force, and the first metal repulsion disc 202 drives the first connecting rod 100 to move downward until the arc extinguish chamber of the main power supply is switched off; at this time, since the first base 305 is made of a material that cannot conduct magnetism, a magnetic circuit formed by the first holding unit casing 302, the first permanent magnet 303 and the first magnetic conductive ring 304 is isolated by the first base 305, and therefore the first permanent magnet holding unit 300 at this position cannot provide a breaking holding force for the main arc-extinguishing chamber; however, the magnetic circuit formed by the second holding unit housing 802, the second permanent magnet 803, the second magnetic conductive ring 804 and the second movable iron core 801 generates an upward holding force, so that the main arc-extinguishing chamber is kept at the opening position, the standby power arc-extinguishing chamber is at the closing position, and finally, the main power supply is cut off and the standby power supply is put into operation.
When the main power supply is recovered to be normal, the arc extinguish chamber of the standby power supply of the fast transfer switch connected with the mechanism is opened, the second opening coil plate 701 is electrified, an eddy current effect is generated between the second opening coil plate 701 and the second metal repulsion plate 702, a downward repulsion force is generated between the second opening coil plate 701 and the second metal repulsion plate 702, the second connecting rod 600 and the second metal repulsion plate 702 are subjected to a downward acting force, and the second metal repulsion plate 702 drives the second connecting rod 600 to move downward until the arc extinguish chamber opening position of the standby power supply is reached; at this time, since the second base 805 is made of a material that cannot conduct magnetism, a magnetic circuit formed by the second holding unit casing 802, the second permanent magnet 803, the second magnetic ring 804 and the second movable iron core 801 is isolated by the second base 805, and therefore the second permanent magnet holding unit 800 at the position cannot provide opening holding force for the standby arc-extinguishing chamber; however, because of the magnetic circuit formed by the first holding unit housing 302, the first permanent magnet 303, the first magnetic conductive ring 304 and the first movable iron core 301, the first permanent magnet holding unit 300 at this position can provide the opening holding force for the standby power supply arc-extinguishing chamber, so that the standby power supply arc-extinguishing chamber is in the opening position, the main arc-extinguishing chamber is held in the closing position, and finally the standby power supply is cut off and the main power supply is put into operation.
The embodiment of the utility model provides an in lever unit, two sets of electromagnetic repulsion force pushing unit, two sets of permanent magnet keep the unit effectively to combine, can improve switch divide-shut brake speed, shorten the arcing time, alleviate the contact ablation, improve change over switch's speediness. In addition, the application of the lever unit realizes the rapid and reliable switching of the main power supply and the standby power supply, and greatly improves the reliability of a dual-power supply system.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (8)
1. An operating mechanism for a lever type quick change-over switch is characterized by comprising a main operating mechanism unit, an auxiliary operating mechanism unit and a lever unit; the main operating mechanism unit is connected with the auxiliary operating mechanism unit through a lever unit, wherein the main operating mechanism unit is arranged at the left side, and the auxiliary operating mechanism unit is arranged at the right side; the lever unit drives the lower left end to move downwards under the driving of the main operating mechanism unit, and when the left end of the lever unit moves downwards to a certain position, the auxiliary operating mechanism unit applies upward holding force to the right end of the lever unit; or the right end of the lever unit moves downwards under the driving of the auxiliary operating mechanism unit, and when the right end of the lever unit moves downwards to a certain position, the main operating mechanism unit applies upward holding force to the left end of the lever unit.
2. The operating mechanism for a lever type fast switch according to claim 1, wherein the main operating mechanism unit comprises three parts of a first electromagnetic repulsive force urging unit, a first connecting rod and a first permanent magnet holding unit; the first electromagnetic repulsion force pushing unit is coaxially connected with the first permanent magnet holding unit through the first connecting rod.
3. The operating mechanism for a lever type fast switch according to claim 1, wherein the sub operating mechanism unit comprises a second electromagnetic repulsive force urging unit, a second connecting rod and a second permanent magnet holding unit; the second electromagnetic repulsion force pushing unit is coaxially connected with the second permanent magnet holding unit through the second connecting rod.
4. The operating mechanism for a lever-type quick switch as claimed in claim 1, wherein the lever unit comprises a lever and a bracket; the left end of the lever is connected with the main operating mechanism unit; the right end of the lever is connected with the auxiliary operating mechanism unit; the middle position of the lever is fixed by the bracket.
5. An operating mechanism for a lever type fast switch according to claim 2, wherein the first electromagnetic repulsive-force urging unit of the main operating mechanism unit comprises a first switching coil plate, a first metal repulsive-force plate and a first supporting member; the first brake coil disc and the first metal repulsion disc are of an up-and-down structure and are coaxially connected through the first connecting rod; the first switching coil disc is connected with the first permanent magnet holding unit through the first supporting piece and is spaced by a first distance.
6. The operating mechanism for a lever-type fast transfer switch as claimed in claim 2, wherein the first permanent magnet holding unit of the main operating mechanism unit comprises a first movable iron core, a first holding unit housing, a first permanent magnet, a first magnetic conductive ring and a first base; the first movable iron core is fixed on the first connecting rod; the first base is arranged above the inner bottom surface of the first holding unit shell; the first permanent magnet is placed in the first holding unit shell and adsorbed on the inner side face of the first holding unit shell; the first magnetic conductive ring is adsorbed on the inner side surface of the first permanent magnet; the first holding unit shell, the first permanent magnet and the first magnetic conduction ring are coaxial.
7. An operating mechanism for a lever type fast switch as claimed in claim 3, wherein the second electromagnetic repulsive force urging unit of the sub operating mechanism unit comprises a second opening coil plate, a second metal repulsive force plate and a second supporting member; the second brake coil disc and the second metal repulsion disc are of an upper-lower structure and are coaxially connected through the second connecting rod; the second switching coil disc is connected with the second permanent magnet holding unit through the second supporting piece and is spaced by a first distance.
8. The operating mechanism of claim 3, wherein the second permanent magnet holding unit of the secondary operating mechanism unit comprises a second movable iron core, a second holding unit housing, a second permanent magnet, a second magnetic conductive ring and a second base; the second movable iron core is fixed on the second connecting rod; the second base is arranged above the inner bottom surface of the second holding unit shell; the second permanent magnet is placed in the second holding unit shell and adsorbed on the inner side face of the second holding unit shell; the second magnetic conductive ring is adsorbed on the inner side surface of the second permanent magnet; the second holding unit shell, the second permanent magnet and the second magnetic conduction ring are coaxial.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122224368.4U CN216015193U (en) | 2021-09-15 | 2021-09-15 | Operating mechanism for lever type quick change-over switch |
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| CN202122224368.4U CN216015193U (en) | 2021-09-15 | 2021-09-15 | Operating mechanism for lever type quick change-over switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113658824A (en) * | 2021-09-15 | 2021-11-16 | 天津工业大学 | Operating mechanism for lever type quick change-over switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113658824A (en) * | 2021-09-15 | 2021-11-16 | 天津工业大学 | Operating mechanism for lever type quick change-over switch |
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