CN115458362A - Adjustable flexible buffer method for switching on and switching off of circuit breaker - Google Patents
Adjustable flexible buffer method for switching on and switching off of circuit breaker Download PDFInfo
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- CN115458362A CN115458362A CN202211042100.1A CN202211042100A CN115458362A CN 115458362 A CN115458362 A CN 115458362A CN 202211042100 A CN202211042100 A CN 202211042100A CN 115458362 A CN115458362 A CN 115458362A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
- H01H33/6662—Operating arrangements using bistable electromagnetic actuators, e.g. linear polarised electromagnetic actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
- F16F15/0232—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means with at least one gas spring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to the technical field of circuit breakers, in particular to an adjustable flexible buffer method for switching on and switching off of a circuit breaker, which comprises the steps that a flexible buffer mechanism for switching on is arranged above a bistable permanent magnet retaining mechanism, and a flexible buffer mechanism for switching off is arranged between the bistable permanent magnet retaining mechanism and a vortex repulsion mechanism; the switching-on and switching-off flexible buffer mechanisms comprise cylinder bodies, buffer pistons are arranged in the cylinder bodies and are used for separating the cylinder bodies to form a high-pressure gas buffer chamber and a quick-exhaust type low-pressure gas chamber, flexible damping gas passages are arranged beside the cylinder bodies and are used for communicating the high-pressure gas buffer chamber with the quick-exhaust type low-pressure gas chamber, and flexible buffer regulating valves are arranged on the flexible damping gas passages; the buffering piston is provided with a one-way valve for air to flow into the high-pressure air buffering chamber from the quick-discharge low-pressure air chamber; the quick-exhaust type low-pressure air chamber is provided with a quick-exhaust gas port for communicating with the external environment; the switching-on and switching-off flexible buffering method provided by the invention can be conveniently adjusted to meet the buffering requirement of a rapid breaker, and has better adaptability.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to an adjustable flexible buffer method for switching on and switching off of a circuit breaker.
Background
High voltage circuit breakers are important control and protection devices in electrical power systems. The operating mechanism is an indispensable important component of the high-voltage circuit breaker, not only needs to ensure that the circuit breaker accurately opens and closes short-circuit current and reliably keeps on an opening position or a closing position, but also needs to complete rapid automatic reclosing operation, and has the functions of jump prevention, automatic reset, locking and the like. Because the switching-on and switching-off operations of the circuit breaker are realized through the operating mechanism, the working performance and the stability of the operating mechanism directly influence the working performance and the reliability of the high-voltage circuit breaker.
The circuit breaker is used as an online protection and control element and has the capacity of quickly isolating fault current. Therefore, the opening and closing speed of the high-voltage circuit breaker is high. On the other hand, in order to reduce the size of the circuit breaker and improve the manufacturing economy of the circuit breaker, the moving stroke of the contact of the circuit breaker is small. To stop the moving part with high speed in a short stroke, the high moving speed is reduced to zero in a small moving stroke, and a large impact is necessarily generated on related parts. Therefore, in the high-voltage circuit breaker, the buffer is required to be adopted to absorb the kinetic energy of the moving part, the redundant energy in the later stage of the opening of the circuit breaker is absorbed, the stability of the opening operation of the circuit breaker is improved, the service life of the circuit breaker is prolonged, and meanwhile, certain parts in the circuit breaker are prevented from being damaged due to huge impact. In addition, the performance index of the circuit breaker also requires that the moving part of the circuit breaker should not be obviously rebounded when the contact movement is finished. Therefore, the damping action of the damper has an important influence on the circuit breaker.
The too strong or too weak buffer can bring influence to the switching-on and switching-off performance of the circuit breaker, and especially has more obvious influence on a quick circuit breaker with the switching-off time less than 5ms and the switching-on time less than 13 ms.
The common switching-on and switching-off buffer device of the existing high-voltage circuit breaker has a hydraulic oil buffer scheme, a spring buffer scheme, a rubber buffer scheme and the like, the buffer schemes play a certain role in switching-on and switching-off buffering of the common-speed circuit breaker, but various problems exist in the role of the quick circuit breaker, and the effect is not ideal.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide an adjustable breaker switching-on and switching-off flexible buffering method, which realizes stable buffering of a quick breaker.
In order to achieve the purpose, the invention adopts the following technical scheme:
an adjustable breaker switching-on and switching-off flexible buffering method comprises the steps that a switching-on flexible buffering mechanism is arranged above a bistable permanent magnet retaining mechanism, and a switching-off flexible buffering mechanism is arranged between the bistable permanent magnet retaining mechanism and a vortex repulsion mechanism;
the flexible closing buffer mechanism and the flexible opening buffer mechanism both comprise cylinder bodies, buffer pistons are arranged in the cylinder bodies and are used for separating the cylinder bodies to form a high-pressure gas buffer chamber and a quick-discharge type low-pressure gas chamber, a flexible damping gas passage is arranged beside the cylinder bodies and is used for communicating the high-pressure gas buffer chamber with the quick-discharge type low-pressure gas chamber, and a flexible buffer regulating valve is arranged on the flexible damping gas passage;
the buffering piston is provided with a one-way valve for allowing gas to flow into the high-pressure gas buffering chamber from the quick-discharge type low-pressure gas chamber;
and a gas quick-discharge port is arranged on the quick-discharge type low-pressure gas chamber and is used for communicating the external environment.
In a further technical scheme, the speed of discharging gas from the high-pressure gas buffer chamber to the quick-discharge type low-pressure gas chamber is adjusted by controlling the opening of the flexible buffer regulating valve.
In a further technical scheme, the check valve including run through the setting and be in air vent on the buffering piston, the articulated offset plate that has arranged on the buffering piston of air vent side, the offset plate can shelter from the air vent is in order to prevent the air flow between high-pressure gas surge chamber and the formula of arranging low pressure air chamber soon.
In a further technical scheme, the air vent has the major diameter section that closes on high-pressure gas surge chamber and closes on the little diameter section of quick-release type low-pressure air chamber, the offset plate articulate on the step portion between major diameter section and the little diameter section.
In a further technical scheme, a concave cavity protruding outwards is arranged on the cylinder body at the gas quick discharge port, and one end of the concave cavity close to the high-pressure gas buffer chamber forms a buffer starting point.
In a further technical scheme, the closed starting point of the high-pressure gas buffer chamber is controlled by controlling the distance between one end of the concave cavity close to the high-pressure gas buffer chamber and the bottom of the high-pressure gas buffer chamber, so that the input starting point of the buffer is controlled, and the requirements of low resistance and rapid braking of the rear section on early acceleration of the rapid breaker are met.
Compared with the prior art, the invention has the following technical effects:
the switching-on and switching-off flexible buffering method provided by the invention can be conveniently adjusted to adapt to the buffering requirement of a quick circuit breaker, and has better adaptability.
By combining the working principle of the opening and closing flexible buffer device provided by the invention, due to the special compression performance of air, the buffer strength is very small and almost negligible during the initial compression, and when the air pressure ratio is increased at the rear section of movement, the buffer strength is rapidly increased, and the buffer strength is rapidly improved. The flexible and stable sudden drop-to-zero requirement that the moving stroke of a contact of the circuit breaker is small, the acceleration at the initial stage of movement is required to be fast, the resistance is small, and the high moving speed is flexibly and stably dropped to zero in the small moving stroke at the rear stage of the movement is just met.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
Fig. 1 is a schematic structural diagram illustrating an adjustable flexible buffer device for opening and closing a circuit breaker according to an embodiment of the present invention;
FIG. 2 isbase:Sub>A schematic view of section A-A of FIG. 1;
fig. 3 is a schematic structural diagram of a quick circuit breaker with a switching flexible buffer device according to an embodiment of the present invention;
FIG. 4 is an enlarged schematic view of position B of FIG. 3;
the reference numbers in the figures illustrate: 1. a primary contact system; 101. static contact; 102. a moving contact; 103. an insulating pull rod; 104. adjusting the pull rod; 2. driving a swing rod; 3. driving the ejector rod; 10. a bistable permanent magnet retention mechanism; 11. opening and maintaining; 12. a holding iron core; 13. closing and keeping; 20. a switching-on flexible buffer mechanism; 21. a first cylinder; 22. a first cushion piston; 23. a first high-pressure gas buffer chamber; 24. a first quick-discharge type low-pressure air chamber; 25. a first flexible damping air passage; 251. a first flexible buffer regulating valve; 26. a first check valve; 27. a first gas quick discharge port; 30. a vortex repulsion mechanism; 301. a closing coil; 302. a brake separating coil; 303. a vortex drive disk; 40. a brake separating flexible buffer mechanism; 41. a second cylinder; 42. a second cushion piston; 43. a second high-pressure gas buffer chamber; 44. a second fast exhaust type low-pressure air chamber; 45. a second flexible damping air passage; 46. a second check valve; 47. and a second gas quick discharge port.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further clarified by combining the specific drawings.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As described above, the present invention provides an adjustable flexible buffer method for opening and closing a breaker, which includes disposing a flexible buffer mechanism 20 above a bistable permanent magnet holding mechanism 10, and disposing an opening flexible buffer mechanism 40 between the bistable permanent magnet holding mechanism 10 and a vortex repulsion mechanism 30;
the flexible closing buffer mechanism 20 and the flexible opening buffer mechanism 40 both comprise cylinder bodies, buffer pistons are arranged in the cylinder bodies and used for separating the cylinder bodies to form a high-pressure gas buffer chamber and a quick-exhaust type low-pressure gas chamber, flexible damping gas passages are arranged beside the cylinder bodies and used for communicating the high-pressure gas buffer chamber with the quick-exhaust type low-pressure gas chamber, and flexible buffer regulating valves are arranged on the flexible damping gas passages;
the buffering piston is provided with a one-way valve for allowing gas to flow into the high-pressure gas buffering chamber from the quick-discharge type low-pressure gas chamber;
and a gas quick-discharge port is arranged on the quick-discharge type low-pressure gas chamber and is used for communicating the external environment.
According to the invention, the opening of the flexible buffer regulating valve is controlled to regulate the speed of discharging gas from the high-pressure gas buffer chamber to the quick-discharge type low-pressure gas chamber.
In the invention, the check valve comprises a vent hole penetrating through the buffer piston, a rubber plate is hinged on the buffer piston beside the vent hole, and the rubber plate can shield the vent hole to prevent the air flow between the high-pressure gas buffer chamber and the quick-discharge type low-pressure air chamber.
In the invention, the vent hole is provided with a large-diameter section close to the high-pressure gas buffer chamber and a small-diameter section close to the quick-discharge type low-pressure gas chamber, and the rubber plate is hinged on a step part between the large-diameter section and the small-diameter section.
In the invention, a concave cavity which protrudes outwards is arranged on the cylinder body at the quick gas exhaust port, and one end of the concave cavity close to the high-pressure gas buffer chamber forms a buffer starting point. Based on the buffering starting point, the buffering piston and the inner wall of the cylinder body start to form sealing fit.
According to the invention, the distance between one end of the concave cavity close to the high-pressure gas buffer chamber and the bottom of the high-pressure gas buffer chamber is controlled, and the closed starting point of the high-pressure gas buffer chamber is controlled, so that the input starting point of the buffer is controlled, and the requirements of low resistance and rapid braking at the rear section on the early-stage acceleration of the rapid breaker are met.
In a specific embodiment of the present invention, referring to fig. 1 and 2, the switching-on flexible buffer mechanism 20 includes a first cylinder 21, a first buffer piston 22 is disposed in the first cylinder 21 for separating the first cylinder 21 into a first high-pressure gas buffer chamber 23 and a first fast-exhaust type low-pressure gas chamber 24, a first flexible damping gas channel 25 is disposed beside the first cylinder 21 for communicating the first high-pressure gas buffer chamber 23 with the first fast-exhaust type low-pressure gas chamber 24, and a first flexible buffer regulating valve 251 is disposed on the first flexible damping gas channel 25; a first check valve 26 is arranged on the first buffer piston 22 to allow air to flow into the first high-pressure air buffer chamber 23 from the first quick-exhaust type low-pressure air chamber 24; the first quick exhaust type low pressure air chamber 24 is provided with a first air quick exhaust port 27 for communicating with the external environment.
The opening flexible buffer mechanism 40 comprises a second cylinder body 41, a second buffer piston 42 is arranged in the second cylinder body 41 and used for separating the second cylinder body 41 into a second high-pressure gas buffer chamber 43 and a second fast-exhaust type low-pressure gas chamber 44, a second flexible damping gas passage 45 is arranged beside the second cylinder body 41 and used for communicating the second high-pressure gas buffer chamber 43 with the second fast-exhaust type low-pressure gas chamber 44, and a second flexible buffer regulating valve 451 is arranged on the second flexible damping gas passage 45; a second check valve 46 is arranged on the second buffer piston 42 to allow air to flow from the second quick-discharge type low-pressure air chamber 44 into the second high-pressure air buffer chamber 43; and a second quick air exhaust port 47 is arranged on the second quick exhaust type low-pressure air chamber 44 and is used for communicating with the external environment.
In a specific embodiment of the present invention, the circuit breaker is a fast circuit breaker with eddy current repulsion operating mechanism, and as shown in fig. 3, the fast circuit breaker is specifically composed of modules such as a primary contact system 1, a bistable permanent magnet holding mechanism 10, an eddy current repulsion mechanism 30, and a driving swing rod 2.
The primary contact system 1 comprises a fixed contact 101, a movable contact 102, an insulating pull rod 103 and an adjusting pull rod 104, wherein the fixed contact 101 and the movable contact 102 are both packaged in a vacuum arc extinguishing chamber.
The bistable permanent magnet retaining mechanism 10 comprises a switching-off retaining mechanism 11, a retaining iron core 12 and a switching-on retaining mechanism 13; permanent magnets are arranged in the opening holder 11 and the closing holder 13, so that the holding iron core 12 can be firmly adsorbed at a working position or an opening position.
The eddy current repulsion mechanism 30 includes a closing coil 301, an opening coil 302 and an eddy current driving disc 303, and plays a role in driving the breaker to rapidly operate.
Taking closing as an example, the working principle of the rapid breaker is as follows:
when a closing command is sent out, a closing energy storage capacitor of the energy storage module is conducted with a closing coil 301 to form a discharge loop, the closing coil 301 generates a transient magnetic field, the magnetic field penetrates through a vortex driving disc 303 close to the closing coil 301, the vortex driving disc 303 generates reverse vortex, the magnetic field generated by the vortex and the magnetic field generated by coil current interact to generate electromagnetic force, the holding force of a brake opening holding magnet is overcome, and meanwhile, great acceleration is generated to drive the vortex driving disc 303 to move downwards; the eddy current driving disk 303, the driving ejector rod 3 and the holding iron core 12 are combined to form a rigid integral synchronous motion, so that the driving ejector rod 3 simultaneously drives the driving swing rod 2 to rotate along a fulcrum, the adjusting pull rod 104 is driven to move upwards together, the insulating pull rod 103 is connected with the moving contact 102 in the vacuum arc-extinguishing chamber, the moving contact 102 is pushed upwards to be closed with the static contact 101, the static contact 101 is pressed together, and a primary loop is switched on. The brake separating principle is the same, and the reverse directions are opposite.
In the technical scheme provided by the invention, the driving ejector rod 3 of the quick breaker is rigidly connected with the first buffer piston 22 of the closing flexible buffer mechanism 20, the second buffer piston 42 of the opening flexible buffer mechanism 40, the holding iron core 12 and the eddy current driving disc 303 together, and moves up and down along with the opening and closing operation of the quick breaker.
During specific work, when the quick breaker is switched on and switched off, the first buffer piston 22 of the switching-on flexible buffer mechanism 20 and the second buffer piston 42 of the switching-off flexible buffer mechanism 40 move up and down along with the driving ejector rod 3.
During switching-on operation, the switching-on flexible buffer mechanism 20 buffers work, and the switching-off flexible buffer mechanism 40 is in a release state and does not generate damping;
on the contrary, during the opening operation, the opening flexible buffer mechanism 40 works in a buffering manner, and the closing flexible buffer mechanism 20 is in a release state and does not generate damping. The flexible buffer of the quick breaker switching-on and switching-off operation tail end is realized, and the breaker performance is improved.
More specifically, during closing operation:
(1) When the circuit breaker is switched on, the ejector rod 3 is driven to drive the first buffer piston 22 to rapidly move downwards, the air pressure in the first high-pressure air buffer chamber 23 is increased steeply, and the first one-way valve 26 arranged on the first buffer piston 22 is driven to close an air passage to maintain the rising of the air pressure; the first quick-exhaust low-pressure air chamber 24 is connected with the outside through the first quick-exhaust air port 27 and is always equal to the atmospheric pressure, so that the air pressure difference between the two sides of the first buffer piston 22 generates a reverse braking force to play a role in buffering.
(2) Because the special compression performance of air, when initial stage compression, buffer strength is very little, can be ignored almost, and to the motion back end, after the gas pressure ratio contracts and increases, buffer strength increases rapidly, and buffer strength promotes rapidly. The requirements that the dynamic stroke of a contact of the circuit breaker is small, the acceleration at the initial stage of motion is fast, the resistance is small, and the high motion speed is flexibly and stably reduced to zero in the small dynamic stroke at the rear stage of motion are met.
(3) Because the two compartments of the first high-pressure gas buffer chamber 23 and the first fast-discharging type low-pressure gas chamber 24 are communicated through the first flexible damping gas passage 25 and the first flexible buffer regulating valve 251, the high-pressure gas of the first high-pressure gas buffer chamber 23 can be controlled through the first flexible buffer regulating valve 251, and according to the requirement of buffer flexibility, the gas is discharged to the first fast-discharging type low-pressure gas chamber 24, and the buffer rigidity is flexibly adjusted to the best value by matching with the parameter requirement of the circuit breaker.
(4) The height of the buffering starting point of the first gas quick discharge port 27 is adjusted, so that the airtight starting point of the first high-pressure gas buffering chamber 23 can be controlled, the input starting point of buffering is controlled, and the requirements of low resistance and quick braking at the rear section of the quick breaker on early acceleration are met.
Specifically, as shown in fig. 3 and 4, an outwardly protruding cavity is provided on the first cylinder 21 at the first gas fast exhausting port 27, and an end of the cavity adjacent to the first high-pressure gas buffer chamber 23 forms a buffer starting point, i.e., a point C shown in fig. 4, based on which the first buffer piston 22 and the inner wall of the first cylinder 21 begin to form a sealing fit.
(5) Design of the first flexible damping air duct 25 without residual reaction force: after the circuit breaker reaches a closing keeping position, high-pressure gas in the first high-pressure gas buffer chamber 23 is released to the first quick-exhaust type low-pressure gas chamber 24 through the first flexible buffer regulating valve 251, and no reverse force is remained after damping is finished, so that the reliability of the circuit breaker in the closing position is ensured.
During the opening operation, the closing flexible buffer mechanism 20 is in a release state and does not work.
Specifically, when the circuit breaker is opened, the driving ejector rod 3 drives the first buffer piston 22 to move upwards quickly, the air pressure of the first high-pressure air buffer chamber 23 generates negative pressure, the first check valve 26 arranged on the first buffer piston 22 is driven to be opened, the air passage is completely opened, the first air quick discharge port 27 of the first quick discharge type low-pressure air chamber 24 is connected with the outside and is always equal to atmospheric pressure, and thus the air pressure difference on two sides of the first buffer piston 22 is zero, and no damping effect is realized.
The brake-separating buffering principle is the same as the brake-closing buffering principle, and the moving direction is opposite, which is not described herein.
The realization of flexible buffering of adjustable switching on and off:
(1) Buffer reaction equation: f = P 1 A 1 -P 2 A 2
In the formula: f-buffering the counter force; p 1 -high pressure gas buffer chamber gas pressure; a. The 1 -the active area of the high-pressure gas buffer chamber; p 2 The pressure of the gas in the low-pressure chamber, which is the atmospheric pressure (P), is quickly vented 2 ＝O.1MPa)；A 2 The active area of the quick-discharge low-pressure air chamber.
(2) Orifice flow equation
The orifice flow type can be determined according to the ratio of the length to the diameter of the orifice, and the repulsive force mechanism is expressed by the flow equation of the damper cylinder orifice as follows:
in the formula: q-flow through the orifice; c d -a flow coefficient; a-total flow area of the damping orifice (area can be adjusted by a flexible buffer regulating valve); rho-hydraulic oil density; Δ p-pressure difference across the orifice.
(3) Variable equation in flexible damping
q＝vA 1 ；
V’＝xA'；
In the formula: v-the speed of movement of the damping piston; x-the motion displacement of the damping piston; a' -effective area of the cross section of the buffer piston; v and V' are respectively the initial air volume and the compressed air volume in the gas buffer chamber.
(4) Method for realizing flexible buffer adjustment
As can be seen from the above mathematical model, there is a relationship between the buffering reaction force F and the movement velocity v and movement displacement x of the piston, and if the movement velocity v and movement displacement x of the piston at a certain time are known, the buffering reaction force F at that time can be calculated; meanwhile, when the damping hole is larger, the buffer is weaker, the rigid collision is obvious, and the rebound of the brake opening and closing is larger; when the damping hole is small, the buffer is strong, the flexible buffer time is too long, although the brake closing and opening rebounding is small, the brake closing and opening is overtime and in place, and the control is also needed.
Therefore, by adjusting the through-flow clearance of the flexible buffer adjusting valve, the optimal flexible buffer point can be found, so that the performance of the circuit breaker is in the optimal state.
The foregoing shows and describes the general principles, essential features, and inventive features of this invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. An adjustable breaker switching-on and switching-off flexible buffering method is characterized by comprising the steps that a switching-on flexible buffering mechanism is arranged above a bistable permanent magnet retaining mechanism, and a switching-off flexible buffering mechanism is arranged between the bistable permanent magnet retaining mechanism and a vortex repulsion mechanism;
the flexible closing buffer mechanism and the flexible opening buffer mechanism both comprise cylinder bodies, buffer pistons are arranged in the cylinder bodies and are used for separating the cylinder bodies to form a high-pressure gas buffer chamber and a quick-discharge type low-pressure gas chamber, a flexible damping gas passage is arranged beside the cylinder bodies and is used for communicating the high-pressure gas buffer chamber with the quick-discharge type low-pressure gas chamber, and a flexible buffer regulating valve is arranged on the flexible damping gas passage;
the buffering piston is provided with a one-way valve for allowing gas to flow into the high-pressure gas buffering chamber from the quick-discharge type low-pressure gas chamber;
and a gas quick-discharge port is arranged on the quick-discharge type low-pressure gas chamber and is used for communicating the external environment.
2. The adjustable breaker opening and closing flexible buffering method as claimed in claim 1, wherein the opening degree of the flexible buffering adjusting valve is controlled to adjust the speed of the gas exhausted from the high pressure gas buffering chamber to the fast exhaust type low pressure gas chamber.
3. The adjustable flexible buffer method for opening and closing of the breaker as claimed in claim 1, wherein the check valve includes a vent hole penetrating through the buffer piston, a rubber plate is hinged on the buffer piston beside the vent hole, and the rubber plate can block the vent hole to prevent air flow between the high pressure gas buffer chamber and the fast exhaust type low pressure gas chamber.
4. The method as claimed in claim 3, wherein the vent hole has a large diameter section adjacent to the high pressure gas buffer chamber and a small diameter section adjacent to the fast discharge type low pressure gas chamber, and the rubber plate is hinged on a step portion between the large diameter section and the small diameter section.
5. The adjustable opening and closing flexible buffering method for the circuit breaker according to claim 1, wherein a cavity protruding outwards is formed on the cylinder body at the gas fast exhaust port, and one end of the cavity, which is close to the high-pressure gas buffering chamber, forms a buffering starting point.
6. The adjustable breaker switching on/off flexible buffering method according to claim 5, wherein the distance between one end of the cavity close to the high-pressure gas buffering chamber and the bottom of the high-pressure gas buffering chamber is controlled to control the starting point of the airtight high-pressure gas buffering chamber, so as to control the starting point of the buffering, and to meet the requirements of the rapid breaker on low resistance in the early stage and rapid braking in the later stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211042100.1A CN115458362A (en) | 2022-08-29 | 2022-08-29 | Adjustable flexible buffer method for switching on and switching off of circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211042100.1A CN115458362A (en) | 2022-08-29 | 2022-08-29 | Adjustable flexible buffer method for switching on and switching off of circuit breaker |
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| CN115458362A true CN115458362A (en) | 2022-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211042100.1A Pending CN115458362A (en) | 2022-08-29 | 2022-08-29 | Adjustable flexible buffer method for switching on and switching off of circuit breaker |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117081019A (en) * | 2023-10-10 | 2023-11-17 | 西安合容开关有限公司 | Quick current limiting device |
-
2022
- 2022-08-29 CN CN202211042100.1A patent/CN115458362A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117081019A (en) * | 2023-10-10 | 2023-11-17 | 西安合容开关有限公司 | Quick current limiting device |
| CN117081019B (en) * | 2023-10-10 | 2024-03-12 | 西安合容开关有限公司 | Quick current limiting device |
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