CN112820577B - Operating mechanism for quick circuit breaking and circuit breaker - Google Patents
Operating mechanism for quick circuit breaking and circuit breaker Download PDFInfo
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- CN112820577B CN112820577B CN202011644345.2A CN202011644345A CN112820577B CN 112820577 B CN112820577 B CN 112820577B CN 202011644345 A CN202011644345 A CN 202011644345A CN 112820577 B CN112820577 B CN 112820577B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 35
- 239000003921 oil Substances 0.000 claims abstract description 45
- 238000004146 energy storage Methods 0.000 claims abstract description 30
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 24
- 230000000694 effects Effects 0.000 abstract description 6
- 230000009471 action Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/24—Power arrangements internal to the switch for operating the driving mechanism using pneumatic or hydraulic actuator
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/28—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
- H01H5/02—Energy stored by the attraction or repulsion of magnetic parts
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses an operating mechanism for rapidly cutting off a circuit, which comprises: the working cylinder is internally provided with an oil way and a main working shaft; the oil tank is arranged above the working cylinder and is used for providing hydraulic oil; the pressurizing assembly is arranged at the rear side of the working cylinder; the energy storage disc spring group is assembled on at least one of the left side and the right side of the working cylinder, and the movement direction of the energy storage piston of the energy storage disc spring group is vertical to the movement direction of the main working shaft; the control assembly is arranged at the front side of the working cylinder and comprises a reversing valve, an electromagnetic driving module and a control module; the reversing valve comprises a valve core and is communicated with the working cylinder through an oil duct; the electromagnetic driving module comprises an electromagnetic repulsion disc and a first coil, the electromagnetic repulsion disc is connected with the valve core, and the first coil is positioned on one side of the electromagnetic repulsion disc; the control module controls the on-off of power supply to the first coil so as to drive the electromagnetic repulsion disc to move. The operating mechanism for rapidly cutting off the circuit and the circuit breaker can achieve the effect of cutting off the circuit more rapidly and reliably, and the safety of the high-voltage circuit breaker is enhanced.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to an operating mechanism for rapidly cutting off a circuit and the circuit breaker.
Background
The traditional high-voltage circuit breaker is electric with contacts, the purpose of opening and closing is achieved through opening and closing actions of the contacts, the opening and closing actions of the contacts can be completed by means of a certain mechanical operating system, and a mechanical operating device outside the circuit breaker body is called an operating mechanism.
The ultra-high voltage circuit breaker port technology generally adopts a single-break technology or a double-break technology, and the two technologies have low voltage and required starting speed, so that a matched operating mechanism does not need to have high power. However, if a breaker with more breaks is adopted, the voltage therein will be multiplied, and the distance between the breaks and the breaking speed will also need to be increased, so that the power, the operation speed and the stability of the matched operation mechanism will also need to be correspondingly increased, and the control module is a core component of the operation mechanism, which determines the operation of the operation mechanism. At present, most control modules for hydraulic operating mechanisms generally adopt secondary control, a primary valve drives a secondary valve to change and change, wherein the primary valve is subjected to mechanical transmission action, and the secondary valve is a hydraulic valve, so that the operation process is equivalent to the process of mechanically transmitting and driving the hydraulic transmission. Therefore, the two-stage switching control method has some defects in terms of the sensitivity and reliability of the operation, and is difficult to satisfy the effect of the ultra-high voltage circuit breaker on the rapid and safe circuit breaking.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an operating mechanism for rapidly cutting off a circuit and a circuit breaker, which can achieve the effect of cutting off the circuit more rapidly and reliably and enhance the safety of the high-voltage circuit breaker.
The invention adopts the following technical scheme:
an operating mechanism for rapidly switching off a circuit, comprising:
the working cylinder is internally provided with an oil duct and a main working shaft, and the main working shaft is positioned in the oil duct;
the oil tank is arranged above the working cylinder and is used for providing hydraulic oil;
the pressurizing assembly is arranged at the rear side of the working cylinder and is used for filling hydraulic oil in the oil tank into the oil duct;
the energy storage disc spring set is assembled on at least one of the left side and the right side of the working cylinder, an energy storage piston of the energy storage disc spring set is positioned in the oil duct, and the movement direction of the energy storage piston is perpendicular to the movement direction of the main working shaft;
the control assembly is arranged at the front side of the working cylinder and comprises a reversing valve, an electromagnetic driving module and a control module; the reversing valve is communicated with the working cylinder through the oil duct and comprises a valve core; the electromagnetic driving module comprises an electromagnetic repulsion disc and a first coil, wherein the electromagnetic repulsion disc is connected with the valve core, and the first coil is positioned on one side of the electromagnetic repulsion disc; the control module can control the power supply on-off of the first coil, and when the first coil is powered on or powered off, the electromagnetic repulsion tray can be driven to move.
Further, the control assembly further comprises a second coil, wherein the second coil is arranged opposite to the first coil, and a space for the electromagnetic repulsion disc to move is defined between the second coil and the first coil; the second coil is positioned at one side of the electromagnetic repulsion disc, which is away from the reversing valve, and the first coil is positioned at one side of the electromagnetic repulsion disc, which is towards the reversing valve; the control module can also control the power supply on-off of the second coil, and when the first coil is electrified and the second coil is powered off, the electromagnetic repulsion tray moves towards the first coil; when the second coil is energized and one coil is de-energized, the electromagnetic repulsion tray moves toward the second coil.
Further, the electromagnetic repulsion tray comprises a tray body and a central shaft, wherein the central shaft is perpendicular to the middle part of the tray body and extends in a direction away from the electromagnetic valve; the control assembly further comprises a clamping module arranged on one side, opposite to the reversing valve, of the electromagnetic driving module, the clamping module comprises a clamping piece and a spring part, one end of the clamping piece is hinged to the center shaft, the other end of the clamping piece is hinged to the spring part, and the spring part provides spring pressure for the clamping piece.
Further, at least two clamping modules are arranged, and all the clamping modules are uniformly distributed around the center shaft in the circumferential direction of the center shaft.
Further, the electromagnetic repulsion disc further comprises a connecting part which is coaxial with the valve core and the center shaft, the connecting part extends from the disc body to one side close to the electromagnetic valve, and the connecting part is connected with the valve core.
Further, the reversing valve further comprises a valve seat, a valve sleeve and an end cover, wherein the valve sleeve is arranged in the valve seat, the valve core is arranged in the valve sleeve, and the end cover is covered at one end, far away from the electromagnetic driving device, of the valve seat.
Further, a sealing sleeve and a buffer sleeve are sleeved outside the main working shaft below the energy storage piston, and the lower surface of the sealing sleeve can be contacted with or separated from the upper surface of the buffer sleeve.
Further, an upper step surface is formed on the lower surface of the sealing sleeve along the inner periphery and/or the outer periphery of the sealing sleeve, and a boosting space is formed between the upper step surface and the upper surface of the buffer sleeve when the lower surface of the sealing sleeve is in contact with the upper surface of the buffer sleeve.
Further, the upper surface of the buffer sleeve is provided with a lower step surface along the inner periphery and/or the outer periphery thereof, and when the lower surface of the sealing sleeve is in contact with the upper surface of the buffer sleeve, the boosting space is formed between the lower step surface and the lower surface or the upper step surface of the sealing sleeve.
A circuit breaker comprises the operating mechanism for rapidly cutting off a circuit.
The operating mechanisms of the circuit breakers of the prior art have drawbacks to which the present invention is directed. Wherein the working cylinder is a main body of the operating mechanism, a pressurizing assembly, an oil tank, an energy storage disc spring group and a control assembly are arranged around the working cylinder, when the high-pressure oil is filled into the pressurizing assembly, the energy storage piston can extend out under the pressure of the high-pressure oil, and the structure is compact in arrangement structure and saves space.
Particularly, the control component of the invention ensures that the reversing is more agile and stable. When the first coil is electrified, an alternating magnetic field is generated around the first coil, reverse induced eddy current is generated on the electromagnetic repulsion disc, the magnetic field generated by the eddy current interacts with the magnetic field generated by the current of the first coil to generate electromagnetic force, and the electromagnetic force enables the electromagnetic repulsion disc to move close to or far away from the first coil, and a valve core connected with the electromagnetic repulsion disc moves along with the electromagnetic repulsion disc, so that the reversing of the electromagnetic valve is realized. Therefore, the electromagnetic repulsion disc in the control assembly can directly act on the valve core, the valve core is controlled more directly and rapidly, the action is more sensitive, the problem that errors possibly occur in the process of driving the second-stage valve to change direction by adopting the first-stage valve in the prior art is avoided, the switching time is omitted, the breaking action is faster, and the valve is very suitable for a breaker needing high action speed and stability.
Drawings
FIG. 1 is a schematic front view of an operating mechanism for a quick disconnect circuit of the present invention;
FIG. 2 is a schematic top view of an operating mechanism for a quick disconnect of the present invention;
FIG. 3 is a schematic cross-sectional view of a control assembly in an operating mechanism for a quick disconnect circuit according to the present invention;
FIG. 4 is an enlarged view of FIG. 1 at A;
fig. 5 is an enlarged view at A1 in fig. 4.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
It will be understood that when an element is referred to as being "fixed 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 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 in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Fig. 1 to 5 show an operating mechanism of the quick-break circuit of the invention, comprising a working cylinder 1, a charging assembly, an oil tank 3, an energy-storage disc spring set 4, a disc spring monitoring module 5 and a control assembly 6: an oil duct and a main working shaft 11 are arranged in the working cylinder 1, the main working shaft 11 is positioned in the oil duct, the working cylinder 1 is a main body of an operating mechanism, and other structures are arranged around the working cylinder 1 to form a compact structure; the oil tank 3 is arranged above the working cylinder 1 and is used for providing hydraulic oil; the pressurizing assembly is arranged at the rear side of the working cylinder 1 and is used for filling the hydraulic oil in the oil tank 3 into the oil duct, and when the pressurizing assembly is filled with high-pressure oil, the energy storage piston 41 stretches out under the pressure of the high-pressure oil; the energy storage disc spring set 4 is assembled on the left side and the right side of the working cylinder 1, the energy storage piston 41 of the energy storage disc spring set is positioned in the oil duct, and the movement direction of the energy storage piston 41 is perpendicular to the movement direction of the main working shaft 11.
As shown in fig. 3, a control assembly 6 is disposed on the front side of the working cylinder 1, and the control assembly 6 includes a reversing valve 61, an electromagnetic driving module 62, and a control module; the reversing valve 61 communicates with the cylinder 1 through an oil passage and includes a valve spool 611; the electromagnetic driving module 62 includes an electromagnetic repulsive force disk 621 and a first coil 622, wherein the electromagnetic repulsive force disk 621 is connected with the valve core 611, and the first coil 622 is located at one side of the electromagnetic repulsive force disk; the control module controls the on-off of the power supply to the first coil 622, and the control module may be a PLC controller, and controls the on-off of the power supply by the controller, so as to control the on-off of the power supply, and when the first coil 622 is on-off, the electromagnetic repulsion disc 621 can be driven to move.
When the first coil 622 is energized, an alternating magnetic field is generated around the first coil 622, and a reverse induced eddy current is generated on the electromagnetic repulsion disc 621, the magnetic field generated by the eddy current interacts with the magnetic field generated by the current of the first coil 622 to generate electromagnetic force, and the electromagnetic force makes the electromagnetic repulsion disc 621 move close to or far from the first coil 622, and the valve core 611 connected with the electromagnetic repulsion disc 621 moves along with the electromagnetic repulsion disc, so that the reversing of the electromagnetic valve is realized. From the above, the electromagnetic repulsion disc 621 in the invention can directly act on the valve core 611, the control of the valve core 611 is more direct and rapid, the action is more sensitive, the problem that errors possibly occur in the process of reversing the primary valve and the secondary valve in the prior art is avoided, the switching time is omitted, the breaking action is faster, and the electromagnetic repulsion disc is very suitable for the circuit breaker which needs high action speed and stability.
As a preferred embodiment of the control unit 6, the control unit 6 further includes a second coil 623, where the second coil 623 is disposed opposite to the first coil 622, and a space for the electromagnetic repulsion disc to move is defined between the second coil 623 and the first coil 622; the second coil 623 is positioned at a side of the electromagnetic repulsive force disc 621 facing away from the direction valve 61, and the first coil 622 is positioned at a side of the electromagnetic repulsive force disc 621 facing toward the direction valve 61. When the first coil 622 or the second coil 623 is separately energized, the generated magnetic field interacts with the electromagnetic repulsion disc 621 to generate a force acting on the electromagnetic repulsion disc 621, and in this embodiment, when the first coil 622 is energized, the electromagnetic repulsion disc 621 moves towards the direction facing the first coil 622, that is, the first coil 622 and the electromagnetic repulsion disc 621 generate suction force, so that the electromagnetic repulsion disc 621 moves leftwards; similarly, when the second coil 623 is energized, the electromagnetic repulsion plate 621 approaches in a direction facing the second coil 623, that is, the second coil 623 and the electromagnetic repulsion plate 621 generate attraction force, so that the electromagnetic repulsion plate 621 moves rightward.
In order to avoid interaction between the first coil 622 and the second coil 623, and also to ensure that the space between the first coil 622 and the second coil 623 is sufficient, the electromagnetic repulsion disc 621 is moved a distance such that the movement of the spool 611 satisfies the commutation; the control device further comprises a limiter 624, wherein the limiter 624 is disposed in a space between the first coil 622 and the second coil 623, and two ends of the limiter 624 respectively abut against the first coil 622 and the second coil 623.
The reversing valve 61 in this embodiment further includes a valve seat 612, a valve sleeve 613, and an end cap 614, the valve sleeve 613 is disposed in the valve seat 612, the valve core 611 is disposed in the valve sleeve 613, and the end cap 614 covers an end of the valve seat 612 away from the electromagnetic driving device. The electromagnetic repulsion disk 621 drives the valve core 611 to move on the valve sleeve 613, so that the breaker operating mechanism can be rapidly opened or closed. The specific working principle is as follows: when the first coil 622 is energized, the electromagnetic repulsion disc 621 moves leftwards to drive the valve core 611 to move on the valve sleeve 613 so as to realize quick reversing, thereby realizing quick closing of the operating mechanism; similarly, when the second coil 623 is energized, the electromagnetic repulsion disc 621 moves rightward to drive the valve core 611 to move on the valve sleeve 613, so as to quickly reverse, thereby realizing quick opening of the operating mechanism.
In order to ensure that the state of the valve core 611 after operation can be maintained, the electromagnetic repulsion disc 621 comprises a disc body 621a and a central shaft 621b, wherein the central shaft 621b is perpendicular to the middle part of the disc body 621a and extends in a direction away from the electromagnetic valve; the control assembly 6 further comprises a clamping module 63 disposed on one side of the electromagnetic driving module 62 opposite to the reversing valve 61, the clamping module 63 comprises a clamping piece 631 and a spring portion, one end of the clamping piece 631 is hinged to the center shaft 621b, the other end of the clamping piece 631 is hinged to the spring portion, and the spring portion provides spring force for the clamping piece 631. After the electromagnetic repulsion disc 621 moves under the action of the first coil 622 or the second coil 623, the clamping piece 631 rotates to the position, and under the pressure of the spring part, the electromagnetic repulsion disc 621 and the valve core 611 can keep the position still until being overcome by another attractive force, and the scheme achieves the effect of keeping the position through a mechanical structure, so that the valve core 611 can keep unchanged in state without continuous power supply after the completion of the change of direction. More preferably, at least two clamping modules are arranged, all the clamping modules are uniformly distributed around the center shaft in the circumferential direction of the center shaft, so that the center shaft of the electromagnetic repulsion disc is more uniformly stressed, and the moving is not easy to deviate.
Specifically, the spring part includes a fixed seat 633, a spring 634, and a movable seat 635, where the movable seat 635 is a fixed member fixed on the side of the driving assembly, and the position of the movable seat 635 is not changeable; one end of the spring 634 abuts the fixed seat 633 and the other end abuts the movable seat 635 and moves with the compression and extension of the spring 634, thereby providing different forces to the clamping member 631 hinged to the movable seat 635.
As a preferred embodiment of the connection between the electromagnetic repulsion disc and the valve core 611, the electromagnetic repulsion disc 621 further includes a connection portion 621c coaxial with the valve core 611 and the central shaft 621b, the connection portion 621c extends from the disc 621a to a side close to the electromagnetic valve, and the connection portion 621c is connected to the valve core 611. An external thread is provided at one end of the valve core 611, an internal thread is provided on the connecting portion 621c of the electromagnetic repulsion disc 621, and the valve core 611 is connected with the internal thread of the connecting portion 621c by mutual screwing of the external thread. The connecting portion 621c and the valve core 611 are coaxially arranged, so that the movement between the two can be more coordinated and reliable, the disc body 621a and the connecting portion 621c are coaxially arranged, so that when the disc body 621a moves under force, the acting force applied to the connecting portion 621c is more consistent, and the movement of the electromagnetic repulsion disc 621 can be more stable and reliable.
As shown in fig. 4 and 5, in accordance with the rapid control action of the control assembly 6, the present invention further comprises a sealing sleeve 12 and a buffer sleeve 13, which are sleeved outside the main working shaft 11 below the energy storage piston 41, wherein the lower surface of the sealing sleeve 12 can be contacted with or separated from the upper surface of the buffer sleeve 13. The sealing sleeve 12 and the buffer sleeve 13 can increase the fit degree between parts and can be used for absorbing the impact force during closing. In order to increase the opening speed during the disconnection, a boosting space 14 is provided between the sealing sleeve 12 and the buffer sleeve 13, in this embodiment, preferably, the lower surface of the sealing sleeve 12 is provided with an upper step surface 121 along the inner circumference and the outer circumference, and the upper surface of the buffer sleeve 13 is provided with a lower step surface 131 along the inner circumference and the outer circumference, and the boosting space 14 is located between the upper step surface 121 and the lower step surface 131. An annular boosting space 14 is formed between the upper step surface 121 and the lower step surface 131, when the brake is separated, high-pressure oil enters the boosting space 14, the high-pressure oil forms upward thrust to the sealing sleeve 12, downward thrust to the buffer sleeve 13, and boosting effect is achieved on separation and breaking of the sealing sleeve 12 and the buffer sleeve 13, so that the brake separation and breaking speed in the scheme is improved by one level. Further preferably, the upper step surface 121 is annular and occupies one third to one half of the total surface of the lower surface of the sealing sleeve 12, so as to balance the buffering effect and the boosting effect.
After the working principle of the reversing valve 61 is explained, the following describes the overall working principle of the operating mechanism of the quick-cut-off circuit in the present invention for realizing closing and opening:
the pressurizing assembly injects high-pressure oil into the upper portion of the main working shaft 11, the top of the energy storage piston, the high-pressure oil passage of the reversing valve 61 of the electromagnetic driving module 62 and the passage cavity of the safety valve. When the charging assembly is used for filling oil, the energy storage piston stretches out under the pressure of high-pressure oil, meanwhile, the disc springs in the energy storage disc spring groups 4 at two sides are compressed for energy storage, and after the energy storage is full, a travel switch of the energy storage disc spring groups 4 cuts off an energy storage loop.
At this time, the upper part of the main working shaft 11 is high pressure oil, the lower part is communicated with the Z port (control oil port) of the main reversing valve 61, the Z port is communicated with the P port (high pressure oil port), the sealing sleeve 12 is contacted with the buffer member, and the whole operating mechanism is in a closing state. When the brake is required to be separated, the control assembly 6 provides high-voltage electricity for the electromagnetic driving module 62, so that the electromagnetic driving module 62 drives the reversing valve 61 to reverse in a very short time, the conduction of the Z port and the T port (low-pressure oil port) is realized, high-pressure oil is arranged above the piston of the main working shaft 11, and low-pressure oil is arranged below the piston of the main working shaft 11, and the main working shaft 11 moves downwards to realize brake separation. After the brake is separated, the auxiliary switch cuts off a brake separating loop, meanwhile, the disc spring monitoring module 5 starts the pressurizing assembly to start pressurizing, the automatic stop is carried out after energy storage is full, and the operating mechanism is kept in a brake separating state.
When the operating mechanism is in a brake-separating state and needs to be switched on, the control module supplies high-voltage electricity to the electromagnetic driving module 62, so that the electromagnetic driving module 62 drives the reversing valve 61 to reverse in a very short time, the Z port and the P port are conducted, high-voltage oil is led into the lower part of the main working shaft 11, the upper part and the lower part of the main working shaft 11 are high-voltage oil, but the main working shaft 11 is pushed to move upwards according to the differential pressure principle because the oil pressure area of the lower part is larger, and the sealing sleeve 12 and the buffer piece are separated, so that the brake-on is realized. After closing, the auxiliary switch cuts off the closing loop, meanwhile, the disc spring monitoring module 5 starts the pressurizing assembly to start pressurizing, the disc spring monitoring module automatically stops after energy is fully accumulated, and the operating mechanism is kept in a closing state.
In addition, the invention also provides a circuit breaker which comprises the operating mechanism for rapidly cutting off the circuit. Except for the operation mechanism for rapidly cutting off the circuit, other structures are commonly used in the art, and are not described herein.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (4)
1. An operating mechanism for rapidly switching off a circuit, comprising:
the working cylinder is internally provided with an oil duct and a main working shaft, and the main working shaft is positioned in the oil duct;
the oil tank is arranged above the working cylinder and is used for providing hydraulic oil;
the pressurizing assembly is arranged at the rear side of the working cylinder and is used for filling hydraulic oil in the oil tank into the oil duct;
the energy storage disc spring set is assembled on at least one of the left side and the right side of the working cylinder, an energy storage piston of the energy storage disc spring set is positioned in the oil duct, and the movement direction of the energy storage piston is perpendicular to the movement direction of the main working shaft;
the control assembly is arranged at the front side of the working cylinder and comprises a reversing valve, an electromagnetic driving module and a control module; the reversing valve is communicated with the working cylinder through the oil duct and comprises a valve core; the electromagnetic driving module comprises an electromagnetic repulsion disc and a first coil, wherein the electromagnetic repulsion disc is connected with the valve core, and the first coil is positioned on one side of the electromagnetic repulsion disc; the control module can control the power supply on-off of the first coil, and when the first coil is powered on or powered off, the electromagnetic repulsion tray can be driven to move;
the control assembly further comprises a second coil and a limiter, wherein the second coil and the first coil are oppositely arranged, and a space for the electromagnetic repulsion disc to move is defined between the second coil and the first coil; the second coil is positioned at one side of the electromagnetic repulsion disc, which is away from the reversing valve, and the first coil is positioned at one side of the electromagnetic repulsion disc, which is towards the reversing valve; the control module can also control the power supply on-off of the second coil, and when the first coil is electrified and the second coil is powered off, the electromagnetic repulsion tray moves towards the first coil; when the second coil is electrified and the coil is deenergized, the electromagnetic repulsion tray moves towards the second coil;
the limiter is arranged in a space between the first coil and the second coil, and two ends of the limiter are respectively abutted against the first coil and the second coil;
the electromagnetic repulsion disc comprises a disc body and a central shaft, wherein the central shaft is perpendicular to the middle part of the disc body and extends out in a direction away from the reversing valve, and is coaxially connected with the valve core; the control assembly further comprises a clamping module arranged on one side of the electromagnetic driving module, which is opposite to the reversing valve, wherein the clamping module comprises a clamping piece and a spring part, one end of the clamping piece is hinged to a center shaft lever close to the tail end of the center shaft, the other end of the clamping piece is hinged to the spring part, and the spring part provides spring pressure for the clamping piece;
at least two clamping modules are arranged, and all the clamping modules are uniformly distributed around the center shaft in the circumferential direction of the center shaft;
a sealing sleeve and a buffer sleeve are sleeved outside the main working shaft below the energy storage piston, and the lower surface of the sealing sleeve can be contacted with or separated from the upper surface of the buffer sleeve;
an upper step surface is formed on the lower surface of the sealing sleeve along the inner periphery and/or the outer periphery of the sealing sleeve, and a boosting space is formed between the upper step surface and the upper surface of the buffer sleeve when the lower surface of the sealing sleeve is in contact with the upper surface of the buffer sleeve;
the upper surface of the buffer sleeve is provided with a lower step surface along the inner periphery and/or the outer periphery, and when the lower surface of the sealing sleeve is in contact with the upper surface of the buffer sleeve, a boosting space is formed between the lower step surface and the lower surface or the upper step surface of the sealing sleeve.
2. The operating mechanism for a quick disconnect circuit as defined in claim 1, wherein said electromagnetic repulsion disc further includes a connecting portion coaxial with said spool and central axis, said connecting portion extending from said disc toward a side adjacent said reversing valve, said connecting portion being connected to said spool.
3. The quick disconnect circuit operating mechanism of claim 1, wherein the reversing valve further comprises a valve seat, a valve sleeve disposed within the valve seat, a valve core disposed within the valve sleeve, and an end cap disposed on an end of the valve seat remote from the electromagnetic drive module.
4. A circuit breaker comprising the operating mechanism of the quick disconnect circuit of any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011644345.2A CN112820577B (en) | 2020-12-30 | 2020-12-30 | Operating mechanism for quick circuit breaking and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011644345.2A CN112820577B (en) | 2020-12-30 | 2020-12-30 | Operating mechanism for quick circuit breaking and circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112820577A CN112820577A (en) | 2021-05-18 |
| CN112820577B true CN112820577B (en) | 2024-01-26 |
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| CN202011644345.2A Active CN112820577B (en) | 2020-12-30 | 2020-12-30 | Operating mechanism for quick circuit breaking and circuit breaker |
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| CN114389225B (en) * | 2021-12-31 | 2023-05-26 | 江苏英美迪自动化科技有限公司 | Emergency power-off power distribution cabinet for preventing line from being self-burning |
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|---|---|---|---|---|
| GB926437A (en) * | 1960-03-07 | 1963-05-15 | Oxley Robert Frederick | Electro-magnetic actuators |
| US3590188A (en) * | 1966-09-01 | 1971-06-29 | Westinghouse Electric Corp | Fluid-blast circuit interrupter with piston assembly and electromagnetic driving means |
| CN2831370Y (en) * | 2005-10-18 | 2006-10-25 | 王光顺 | Permanent-magnet locking hydraulic operation gear of ultrahigh voltage circuit breaker |
| CN101393816A (en) * | 2008-10-31 | 2009-03-25 | 沈阳东华工大高压电器设备有限公司 | Electromagnetic hydraulic valve type spring hydraulic operating mechanism having self-defense capability |
| CN102403139A (en) * | 2011-10-28 | 2012-04-04 | 中国电力科学研究院 | Repulsion reversing valve for extra-high voltage series compensation bypass switch |
| CN204332869U (en) * | 2014-10-16 | 2015-05-13 | 平高集团有限公司 | Repulsion operating mechanism |
| CN110966429A (en) * | 2019-12-31 | 2020-04-07 | 无锡市三信传动控制有限公司 | High-speed two-position three-way hydraulic valve |
| CN111173800A (en) * | 2019-12-16 | 2020-05-19 | 河南平高电气股份有限公司 | Electrohydraulic control valve for hydraulic operating mechanism and electromagnetic pilot valve and pilot valve thereof |
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2020
- 2020-12-30 CN CN202011644345.2A patent/CN112820577B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB926437A (en) * | 1960-03-07 | 1963-05-15 | Oxley Robert Frederick | Electro-magnetic actuators |
| US3590188A (en) * | 1966-09-01 | 1971-06-29 | Westinghouse Electric Corp | Fluid-blast circuit interrupter with piston assembly and electromagnetic driving means |
| CN2831370Y (en) * | 2005-10-18 | 2006-10-25 | 王光顺 | Permanent-magnet locking hydraulic operation gear of ultrahigh voltage circuit breaker |
| CN101393816A (en) * | 2008-10-31 | 2009-03-25 | 沈阳东华工大高压电器设备有限公司 | Electromagnetic hydraulic valve type spring hydraulic operating mechanism having self-defense capability |
| CN102403139A (en) * | 2011-10-28 | 2012-04-04 | 中国电力科学研究院 | Repulsion reversing valve for extra-high voltage series compensation bypass switch |
| CN204332869U (en) * | 2014-10-16 | 2015-05-13 | 平高集团有限公司 | Repulsion operating mechanism |
| CN111173800A (en) * | 2019-12-16 | 2020-05-19 | 河南平高电气股份有限公司 | Electrohydraulic control valve for hydraulic operating mechanism and electromagnetic pilot valve and pilot valve thereof |
| CN110966429A (en) * | 2019-12-31 | 2020-04-07 | 无锡市三信传动控制有限公司 | High-speed two-position three-way hydraulic valve |
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| CN112820577A (en) | 2021-05-18 |
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