CN112583104A - Mining incessant formula DC power supply control box - Google Patents
Mining incessant formula DC power supply control box Download PDFInfo
- Publication number
- CN112583104A CN112583104A CN202011385352.5A CN202011385352A CN112583104A CN 112583104 A CN112583104 A CN 112583104A CN 202011385352 A CN202011385352 A CN 202011385352A CN 112583104 A CN112583104 A CN 112583104A
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- China
- Prior art keywords
- air inlet
- power supply
- arc
- conductive component
- extinguishing switch
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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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
- H01H33/662—Housings or protective screens
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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
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/52—Cooling of switch parts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/0354—Gas-insulated switchgear comprising a vacuum switch
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to the technical field of power control, in particular to a mining uninterrupted direct-current power supply control box. Including box, main power supply, stand-by power supply and circuit breaker, the circuit breaker includes arc extinguishing switch, admit air stopper, locking device, pre-break device and electromagnetic control device, has aspirating hole and inlet channel on the arc extinguishing switch, and the aspirating hole intercommunication air exhaust device. When the arc-extinguishing switch is switched on, the air inlet channel is communicated with the external atmosphere, and the air exhaust device exhausts air from the interior of the arc-extinguishing switch so as to realize ventilation and guarantee effective heat dissipation of the arc-extinguishing switch; when the voltage of the main power supply is higher than the preset value, the electromagnetic control device enables the air inlet plug to plug the air inlet channel, the air exhaust device continues to exhaust air to enable the vacuum degree inside the arc extinguishing switch to be increased, when the vacuum degree inside the arc extinguishing switch is higher than the preset value, the arc extinguishing switch is disconnected, and meanwhile arcing is avoided under the vacuum environment inside the arc extinguishing switch at the moment.
Description
Technical Field
The invention relates to the technical field of power control, in particular to a mining uninterrupted direct-current power supply control box.
Background
An uninterruptible power supply is a power supply with an energy storage device, and is mainly used for providing continuous power supply for parts of equipment with high requirements on the stability of the power supply. The uninterrupted power supply is widely applied to the fields of mines, aerospace, national defense, hospitals, emergency lighting systems, railways, nuclear power stations, fire safety alarm systems and the like.
The mining uninterrupted direct current power supply has a strong explosion-proof function due to the special requirement of the environment, and the vacuum circuit breaker for explosion prevention has the problems of difficult heat dissipation and poor explosion-proof performance. Therefore, it is necessary to provide a vacuum switch having both high explosion-proof performance and good heat dissipation performance.
Disclosure of Invention
According to at least one defect in the prior art, the invention provides a mining uninterruptible direct-current power supply control box, which is used for solving the problems that the existing uninterruptible direct-current power supply is difficult to radiate heat and has poor explosion-proof performance.
The invention relates to a mining uninterrupted DC power supply control box, which adopts the following technical scheme: the circuit breaker is connected between the main power supply and a load circuit so as to disconnect the main power supply and the load circuit when the voltage of the main power supply is higher than a preset value; the circuit breaker comprises an arc extinguishing switch, an air inlet plug, a locking device, a pre-breaking device and an electromagnetic control device;
the arc-extinguishing switch is provided with an air exhaust hole and an air inlet channel which are communicated with the interior of the arc-extinguishing switch, an air exhaust device connected with the air exhaust hole is arranged outside the arc-extinguishing switch, when the arc-extinguishing switch is switched on, the air inlet channel is communicated with the outside atmosphere, and the air exhaust device exhausts air from the interior of the arc-extinguishing switch so as to realize ventilation;
the locking device is arranged on the arc-extinguishing switch, and the movable conductive component and the static conductive component of the arc-extinguishing switch are electrically connected under the action of air pressure inside and outside the arc-extinguishing switch;
when the voltage of the main power supply is higher than a preset value, the output end of the electromagnetic control device acts, the air inlet plug is enabled to plug an air inlet channel of the arc-extinguishing switch through the transmission device, the pre-breaking device accumulates force for disconnecting the movable conductive component and the static conductive component, the air exhaust device exhausts air inside the arc-extinguishing switch, so that the vacuum degree inside the arc-extinguishing switch is increased, when the vacuum degree inside the arc-extinguishing switch is higher than the preset value, the locking device releases locking of the movable conductive component under the action of air pressure inside and outside the arc-extinguishing switch, the force accumulated by the pre-breaking device enables the arc-extinguishing switch to be disconnected, and meanwhile, arc starting is avoided in the vacuum environment inside the arc-extinguishing switch at the moment.
Optionally, the arc extinguishing switch comprises an insulating shell, the air exhaust hole is arranged on the lower side wall of the insulating shell, and the air inlet channel is arranged on the upper side wall of the insulating shell; the air inlet channel comprises a first air inlet hole, a second air inlet hole and a third air inlet hole, the first air inlet hole and the second air inlet hole are arranged vertically and at intervals, the first air inlet hole penetrates through the upper surface of the insulating shell, the second air inlet hole penetrates through the upper side wall of the insulating shell, and the third air inlet hole is horizontally connected between the first air inlet hole and the second air inlet hole;
the air inlet plug is inserted at the upper end of the second air inlet hole, the air inlet plug is hollow, a first air inlet is formed in the side wall of the air inlet plug, when the static conductive component is in contact with the dynamic conductive component, the first air inlet is communicated with the third air inlet hole, when the voltage of the main power supply is higher than a preset value, the electromagnetic control device drives the air inlet plug to move upwards through the transmission device, and the first air inlet and the third air inlet hole are staggered;
and a first return spring is arranged between the air inlet plug and the second air inlet hole to urge the air inlet plug to return.
Optionally, the pre-breaking device includes a first connection tension spring and a transmission sleeve, the transmission sleeve is installed in move the conducting component and with move conducting component sliding connection, first connection tension spring cover is located move the conducting component, and with move the conducting component with the transmission sleeve is connected when the voltage of main power supply is higher than the default, the electromagnetic control device passes through the transmission device control the transmission sleeve is followed move the conducting component and is removed, and then pull open first connection tension spring, first connection tension spring is accumulated and is made the conducting component keep away from the power of quiet conducting component.
Optionally, the locking device includes a permanent magnet, a locking magnetic buckle, a first fixing spring and a second fixing spring, the permanent magnet is slidably mounted in the first air inlet hole, the first fixing spring is connected between the first air inlet hole and the permanent magnet along the vertical direction, the lower end of the first air inlet hole is communicated with the inside of the insulating housing, the locking magnetic buckle is mounted in the movable conductive component through the second fixing spring, and the polarities of two corresponding surfaces of the permanent magnet and the locking magnetic buckle are opposite;
the upper side wall of the insulating shell is provided with a sliding hole, the movable conductive component penetrates through the sliding hole, the lower side of the third air inlet hole is provided with a horizontally extending locking hole, the locking hole is communicated with the first air inlet hole and the sliding hole, when the static conductive component is communicated with the movable conductive component, the permanent magnet block corresponds to the locking magnetic buckle, and the locking magnetic buckle is positioned in the locking hole under the action of magnetic attraction to block the movement of the movable conductive component; when the vacuum degree in the insulating shell is increased and is higher than a preset value, the permanent magnet blocks overcome the elastic force of the first fixing spring to move downwards, the magnetic force of the locking magnetic buckle and the permanent magnet blocks is weakened when the locking magnetic buckle and the permanent magnet blocks are away from each other, and the locking magnetic buckle retracts into the movable conductive component under the action force of the second fixing spring to allow the movable conductive component to move;
the locking device further comprises a sealing sliding block, and the sealing sliding block is connected below the permanent magnet blocks.
Optionally, a plunger is arranged on the movable conductive component and located in the air exhaust hole, the plunger is communicated with the air exhaust hole in a conventional state, and after the static conductive component is separated from the movable conductive component, the plunger moves upwards along with the movable conductive component to block the air exhaust hole, so that the vacuum degree in the insulating shell is maintained.
Optionally, the transmission device includes a transmission rod and a support sleeve, the support sleeve is movably hinged to the insulating housing through a support frame, the transmission rod is slidably inserted into the support sleeve, one end of the transmission rod is hinged to the transmission sleeve, and the other end of the transmission rod is connected to an output end of the electromagnetic control device;
the transmission rod is sleeved with a transmission sliding block in a sliding mode, and the transmission sliding block is connected with the air inlet plug through a second return spring.
Optionally, the output end of the electromagnetic control device is an armature, the electromagnetic control device further comprises an electromagnet and a second connecting tension spring, the electromagnet is fixedly arranged, the armature is arranged on the opposite side of the electromagnet through the second connecting tension spring, and the armature is movably hinged to the transmission rod.
Optionally, the insulating casing includes a movable end sealing cover, a ceramic pipe body and a stationary end sealing cover which are sequentially connected from top to bottom, the stationary conductive component includes a stationary contact and a stationary conductive rod, the movable conductive component includes a movable contact and a movable conductive rod, the stationary conductive rod is fixedly mounted on the stationary end sealing cover and extends into the insulating casing, the movable conductive rod is slidably mounted on the movable end sealing cover, and the stationary contact and the movable contact are respectively connected to the stationary conductive rod and the inner end of the movable conductive rod.
Optionally, the outer circumferential surfaces of the static contact and the moving contact are both provided with an insulating housing, a shielding case is installed in the insulating housing, and the static contact and the moving contact are located in the shielding case.
Optionally, the preset voltage of the main power supply is higher than the preset voltage of the backup power supply, the main power supply supplies power to the load circuit in a normal state, and when the voltage of the main power supply is lower than the voltage of the backup power supply, the main power supply is automatically switched to supply power to the load circuit by the backup power supply; when the voltage of the main power supply rises and is higher than a preset value, the circuit breaker is switched to the standby power supply to supply power to the load circuit.
The invention has the beneficial effects that: according to the mining uninterrupted DC power supply control box, the arc extinguishing switch is provided with the air exhaust hole and the air inlet channel, the interior of the arc extinguishing switch is communicated with the outside, and is connected with the air exhaust device through the air exhaust hole, and when the arc extinguishing switch is disconnected, the arc is in a vacuum state to inhibit the generation of electric arcs, so that the arc extinguishing and explosion preventing effects are achieved; under the on-state of the arc-extinguishing switch, the arc-extinguishing switch is in a ventilation state, so that the heat dissipation problem is solved. Therefore, the uninterrupted direct-current power supply control box has high explosion-proof performance and high heat dissipation performance at the same time, and the safety coefficient is high.
Drawings
In order to illustrate more clearly the embodiments of the invention or the solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained by those skilled in the art without inventive exercise from these drawings, it being understood that these drawings are not necessarily drawn to scale.
Fig. 1 is a circuit layout schematic diagram of an uninterruptible direct-current power supply control box for a mine.
Fig. 2 is a schematic diagram of the general structure of the arc extinguishing switch of the present invention.
Fig. 3 is a partially enlarged view of a portion a in fig. 2.
Fig. 4 is a schematic view of the internal structure of the arc extinguishing switch of the present invention when closed.
Fig. 5 is a schematic diagram of the internal structure of the arc extinguishing switch before the arc extinguishing switch is turned off.
Fig. 6 is a schematic diagram of the internal structure of the arc extinguishing switch of the invention after being turned off.
FIG. 7 is a schematic diagram of an electromagnetic control device according to the present invention.
Fig. 8 is a partial enlarged view of fig. 4 at B.
Fig. 9 is a partial enlarged view of fig. 4 at C.
In the figure: 100. a stationary end sealing cover; 101. an air exhaust hole; 102. a second communication hole; 200. a movable end sealing cover; 201. a first air intake hole; 202. a second air intake hole; 203. a third air inlet hole; 204. a first communication hole; 205. locking the hole; 300. a ceramic tube body; 400. a moving contact; 402. a plunger; 403. a second air inlet; 405. a movable conductive rod; 500. static contact; 501. an insulating housing; 502. a static conductive rod; 600. locking the magnetic buckle; 601. a second fixed spring; 700. a transmission rod; 702. a support sleeve; 800. an air inlet plug; 801. a first air inlet; 802. a second return spring; 803. a transmission slide block; 804. a first return spring 804; 900. permanent magnet blocks; 901. sealing the sliding block; 902. a first fixed spring; 1000. a drive sleeve; 1001. the first connecting tension spring; 1100. an armature; 1101. connecting a support; 1200. an electromagnet; 1300. a second connecting tension spring; 1400. and (7) mounting frames.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 9, the mining uninterruptible direct current power supply control box of the invention includes a box body (not shown in the figures), a main power supply (U in fig. 1), a backup power supply (backup battery pack in fig. 1), and a circuit breaker (QS in fig. 1), wherein the circuit breaker is connected between the main power supply and a load circuit, the preset voltage of the main power supply is higher than the preset voltage of the backup power supply, the main power supply supplies power to the load circuit in a normal state, and the backup power supply is in a float state. When the voltage of the main power supply is lower than that of the standby power supply, the standby power supply is automatically switched to supply power to the load circuit, diodes are arranged on the main power supply circuit and the standby power supply circuit, and the side with high voltage is conducted to output or is realized by other modes. When the voltage of the main power supply rises and is higher than a preset value, the circuit breaker disconnects the main power supply from the load circuit, and therefore the circuit breaker is switched into a standby power supply to supply power to the load circuit.
The circuit breaker includes an arc extinguishing switch, an air inlet plug 800, a locking device, a pre-breaking device, and an electromagnetic control device. The arc-extinguishing switch is provided with an air exhaust hole 101 and an air inlet channel which are communicated with the interior of the arc-extinguishing switch, an air exhaust device connected with the air exhaust hole 101 is arranged outside the arc-extinguishing switch, and the air exhaust device can be an external air pump, such as M in figure 1. When the arc extinguishing switch switches on, the air inlet channel communicates with the outside atmosphere, and the air exhaust device exhausts the inside of the arc extinguishing switch to realize ventilation and guarantee the effective heat dissipation of the arc extinguishing switch. The locking device is arranged on the arc-extinguishing switch, and the movable conductive component and the static conductive component of the arc-extinguishing switch are electrically connected under the action of the air pressure inside and outside the arc-extinguishing switch.
When the voltage of the main power supply is higher than a preset value, the output end of the electromagnetic control device acts and enables the air inlet plug 800 to block an air inlet channel of the arc extinguishing switch through the transmission device, and the pre-breaking device accumulates the force for breaking the movable conductive component and the static conductive component. Air exhaust device continues to bleed air to the inside of arc extinguishing switch to make the inside vacuum grow of arc extinguishing switch, when the inside vacuum of arc extinguishing switch was higher than the default, locking device removed the locking to moving conductive component under the effect of the inside and outside atmospheric pressure of arc extinguishing switch, and the power of pre-breaking device accumulation makes the disconnection of arc extinguishing switch, avoids striking simultaneously under the vacuum environment this moment inside the arc extinguishing switch. According to the scheme, the interior of the arc-extinguishing switch is communicated with the outside and is connected with the air extraction device, and the arc-extinguishing switch is in a vacuum state when being disconnected to inhibit electric arcs from being generated, so that arc-extinguishing and explosion-proof effects are achieved; under the on-state of the arc-extinguishing switch, the arc-extinguishing switch is in a ventilation state, so that the heat dissipation problem is solved.
In this embodiment, the arc extinguishing switch includes an insulating case, the air exhaust hole 101 is provided in a lower sidewall of the insulating case, and the air intake passage is provided in an upper sidewall of the insulating case. The air inlet channel includes first inlet port 201, second inlet port 202 and third inlet port 203, and first inlet port 201 and the vertical and interval setting of second inlet port 202, the upper surface of insulating casing is run through to first inlet port 201, and the last lateral wall of insulating casing is run through to second inlet port 202, and third inlet port 203 horizontal connection is between first inlet port 201 and second inlet port 202. The air inlet plug 800 is inserted at the upper end of the second air inlet hole 202, the air inlet plug 800 is hollow, the side wall of the air inlet plug 800 is provided with a first air inlet 801, when the static conductive component contacts with the dynamic conductive component, the first air inlet 801 is communicated with the third air inlet hole 203, when the main power voltage is higher than a preset value, the electromagnetic control device drives the air inlet plug 800 to move upwards through the transmission device, the first air inlet 801 and the third air inlet hole 203 are staggered to cut off an air inlet channel, the air exhaust device exhausts the inside of the insulating shell, and the vacuum degree of the inside of the insulating shell is improved.
A first return spring 804 is provided between the inlet plug 800 and the second inlet hole 202 to urge the inlet plug 800 to return. Specifically, the upper end of the second air inlet 202 is provided with a mounting hole having a diameter larger than that of the second air inlet 202, the left side of the mounting hole is provided with a placing groove, the peripheral wall surface of the air inlet plug 800 is provided with a protrusion, the height of the protrusion is smaller than the depth of the placing groove, and the first return spring 804 is vertically connected between the upper limiting surface and the lower surface of the placing groove. For the installation of the air inlet plug 800, a vertical guide groove communicated with the placing groove is formed in the inner side wall of the mounting hole, the protrusion is placed downwards along the vertical guide groove, and the protrusion rotates to enter the placing groove after the connection position of the vertical guide groove and the placing groove.
In this embodiment, the pre-breaking device includes a first connection tension spring 1001 and a transmission sleeve 1000, the transmission sleeve 1000 is installed on the movable conductive component and slidably connected to the movable conductive component, and the first connection tension spring 1001 is sleeved on the movable conductive component and connected to the movable conductive component and the transmission sleeve 1000. When the voltage of the main power supply is higher than a preset value, the electromagnetic control device controls the transmission sleeve 1000 to move upwards along the movable conductive component through the transmission device, so that the first connection tension spring 1001 is pulled open, and the first connection tension spring 1001 accumulates the force for enabling the movable conductive component to be far away from the static conductive component.
In this embodiment, the locking device includes a permanent magnet 900, a locking magnetic buckle 600, a first fixing spring 902 and a second fixing spring 601, the permanent magnet 900 is slidably installed in the first air inlet hole 201, the first fixing spring 902 is connected between the first air inlet hole 201 and the permanent magnet 900 along the vertical direction, the lower end of the first air inlet hole 201 is communicated with the inside of the insulating housing through a first communication hole 204, the locking magnetic buckle 600 is installed in the movable conductive component through the second fixing spring 601, and the polarities of the two corresponding surfaces of the permanent magnet 900 and the locking magnetic buckle 600 are opposite.
The upper side wall of insulating casing is provided with the slide opening, moves the conducting component and passes the slide opening, and the downside of third inlet port 203 is provided with the horizontal extension's lock hole 205, and lock hole 205 communicates first inlet port 201 and slide opening. When the static conductive component and the dynamic conductive component are conducted, the permanent magnet 900 corresponds to the locking magnetic fastener 600, and the locking magnetic fastener 600 is positioned in the locking hole 205 under the action of magnetic attraction force to block the movement of the dynamic conductive component; when the vacuum degree in the insulating shell is increased and is higher than the preset value, under the action of the air pressure difference in the insulating shell, the permanent magnet 900 overcomes the elastic force of the first fixing spring 902 to move downwards, the locking magnetic buckle 600 and the permanent magnet 900 are far away from each other, the magnetic force is weakened, and the locking magnetic buckle 600 retracts into the movable conductive component under the action force of the second fixing spring 601 to allow the movable conductive component to move.
In order to improve the sealing effect of the locking device, the locking device further comprises a sealing sliding block 901, the sealing sliding block 901 is connected below the permanent magnet block 900, the sealing sliding block 901 is in sliding connection with the first air inlet hole 201, and the first fixing spring 902 is connected between the sealing sliding block 901 and the lower bottom surface of the first air inlet hole 201.
In this embodiment, the movable conductive component is provided with the plunger 402, the plunger 402 is located in the air exhaust hole 101, the plunger 402 is communicated with the air exhaust hole 101 in a conventional state, and after the movable conductive component is separated from the stationary conductive component, the plunger 402 moves upwards along with the movable conductive component to block the air exhaust hole 101, so that the vacuum degree in the insulating shell is maintained, and the arc extinguishing effect can be still achieved when the movable conductive component and the stationary conductive component are switched on next time. Specifically, a second air inlet 403 is provided on the side wall of the plunger 402, a second communication hole 102 for communicating the inside of the insulating housing with the first pumping hole 101 is provided on the lower side wall of the insulating housing, the second air inlet 403 and the second communication hole 102 are communicated in a normal state, and after the static conductive member and the dynamic conductive member are separated, the second air inlet 403 and the second communication hole 102 are dislocated to block the pumping hole 101.
In this embodiment, the transmission device includes a transmission rod 700 and a support sleeve 702, a support frame is disposed on the insulating housing, the support sleeve 702 is movably hinged to the support frame, the transmission rod 700 is slidably inserted into the support sleeve 702, and one end of the transmission rod is hinged to the transmission sleeve 1000, and the other end of the transmission rod is connected to an output end of the electromagnetic control device. The transmission slider 803 is slidably sleeved on the transmission rod 700, the transmission slider 803 is connected with the air inlet plug 800 through the second return spring 802, and when the transmission rod 700 rotates counterclockwise and downward, the air inlet plug 800 is pulled to move upward through the second return spring 802, and the transmission sleeve 1000 is driven to slide upward along the movable conductive assembly.
In this embodiment, the output end of the electromagnetic control device is an armature 1100, the electromagnetic control device further includes an electromagnet 1200 and a second connecting tension spring 1300, the electromagnet 1200 is fixedly disposed, the armature 1100 is disposed on the opposite side of the electromagnet 1200 through the second connecting tension spring 1300, and the armature 1100 is movably hinged to the transmission rod 700. A connection bracket 1101 is provided on a side wall of the armature 1100 to facilitate connection with the transmission lever 700. The electromagnetic control device is installed on the insulating shell of the arc extinguishing switch through the installation frame 1400, and the installation frame and the insulating shell of the arc extinguishing switch can be set at a proper angle according to the position of the transmission rod 700, so that the transmission rod 700 can be reliably transmitted. The electromagnet 1200 is separately connected to the circuit of the main power supply, and generates magnetic force after being powered on, and when the voltage of the main power supply rises and is higher than a preset value, the magnetic force of the electromagnet 1200 increases, so that the armature 1100 is driven to move downwards by overcoming the tension of the second connecting tension spring 1300, and further the transmission rod 700 is driven to rotate clockwise and move towards the upper end of the transmission rod 700 along the support sleeve 702. When the voltage of the main power supply is lowered and is lower than a preset value, the magnetic force of the electromagnet 1200 is weakened, and the armature 1100 is reset by the force of the second connection tension spring 1300.
In this embodiment, the insulation shell includes a movable end sealing cover 200, a ceramic tube 300 and a stationary end sealing cover 100 connected in sequence from top to bottom, the movable end sealing cover 200 forms an upper side wall of the insulation shell, the stationary end sealing cover 100 forms a lower side wall of the insulation shell, and the insulation shell is configured as a split structure for convenient installation. The static conductive component comprises a static contact 500 and a static conductive rod 502, the dynamic conductive component comprises a dynamic contact 400 and a dynamic conductive rod 405, the static conductive rod 502 is fixedly arranged on the static end sealing cover 100 and extends into the insulating shell, the dynamic conductive rod 405 is slidably arranged on the dynamic end sealing cover 200, and the static contact 500 and the dynamic contact 400 are respectively connected to the static conductive rod 502 and the inner end of the dynamic conductive rod 405. An installation groove is formed in the outer circular surface of the movable conducting rod 405, the second fixing spring 601 is connected between the locking magnetic buckle 600 and the installation groove, and the locking magnetic buckle 600 is located in the installation groove under the action of the second fixing spring 601. A collar is protruded outwards from the outer circumferential surface of the movable conductive rod 405, the first connection tension spring 1001 is connected between the collar and the transmission sleeve 1000, and the collar is provided to facilitate the installation of the first connection tension spring 1001.
The outer circular surfaces of the static contact 500 and the moving contact 400 are both provided with an insulating housing 501, a shielding case is installed in the insulating housing, and the static contact 500 and the moving contact 400 are located on the inner side of the shielding case.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a mining incessant formula DC power supply control box which characterized in that: the circuit breaker is connected between the main power supply and a load circuit so as to disconnect the main power supply and the load circuit when the voltage of the main power supply is higher than a preset value; the circuit breaker comprises an arc extinguishing switch, an air inlet plug, a locking device, a pre-breaking device and an electromagnetic control device;
the arc-extinguishing switch is provided with an air exhaust hole and an air inlet channel which are communicated with the interior of the arc-extinguishing switch, an air exhaust device connected with the air exhaust hole is arranged outside the arc-extinguishing switch, when the arc-extinguishing switch is switched on, the air inlet channel is communicated with the outside atmosphere, and the air exhaust device exhausts air from the interior of the arc-extinguishing switch so as to realize ventilation;
the locking device is arranged on the arc-extinguishing switch, and the movable conductive component and the static conductive component of the arc-extinguishing switch are electrically connected under the action of air pressure inside and outside the arc-extinguishing switch;
when the voltage of the main power supply is higher than a preset value, the output end of the electromagnetic control device acts, the air inlet plug is enabled to plug an air inlet channel of the arc-extinguishing switch through the transmission device, the pre-breaking device accumulates force for disconnecting the movable conductive component and the static conductive component, the air exhaust device exhausts air inside the arc-extinguishing switch, so that the vacuum degree inside the arc-extinguishing switch is increased, when the vacuum degree inside the arc-extinguishing switch is higher than the preset value, the locking device releases locking of the movable conductive component under the action of air pressure inside and outside the arc-extinguishing switch, the force accumulated by the pre-breaking device enables the arc-extinguishing switch to be disconnected, and meanwhile, arc starting is avoided in the vacuum environment inside the arc-extinguishing switch at the moment.
2. The mining uninterruptible direct-current power supply control box according to claim 1, characterized in that: the arc extinguishing switch comprises an insulating shell, the air exhaust hole is formed in the lower side wall of the insulating shell, and the air inlet channel is formed in the upper side wall of the insulating shell; the air inlet channel comprises a first air inlet hole, a second air inlet hole and a third air inlet hole, the first air inlet hole and the second air inlet hole are arranged vertically and at intervals, the first air inlet hole penetrates through the upper surface of the insulating shell, the second air inlet hole penetrates through the upper side wall of the insulating shell, and the third air inlet hole is horizontally connected between the first air inlet hole and the second air inlet hole;
the air inlet plug is inserted at the upper end of the second air inlet hole, the air inlet plug is hollow, a first air inlet is formed in the side wall of the air inlet plug, when the static conductive component is in contact with the dynamic conductive component, the first air inlet is communicated with the third air inlet hole, when the voltage of the main power supply is higher than a preset value, the electromagnetic control device drives the air inlet plug to move upwards through the transmission device, and the first air inlet and the third air inlet hole are staggered;
and a first return spring is arranged between the air inlet plug and the second air inlet hole to urge the air inlet plug to return.
3. The mining uninterruptible direct-current power supply control box according to claim 1, characterized in that: the pre-breaking device comprises a first connection tension spring and a transmission sleeve, the transmission sleeve is installed on the movable conductive component and is in sliding connection with the movable conductive component, the first connection tension spring is sleeved on the movable conductive component and is connected with the movable conductive component and the transmission sleeve, when the voltage of the main power supply is higher than a preset value, the electromagnetic control device controls the transmission sleeve to move along the movable conductive component, the first connection tension spring is pulled open, and the first connection tension spring accumulates force for enabling the movable conductive component to be far away from the static conductive component.
4. The mining uninterruptible direct-current power supply control box according to claim 2, characterized in that: the locking device comprises a permanent magnet, a locking magnetic buckle, a first fixing spring and a second fixing spring, the permanent magnet is slidably mounted in the first air inlet hole, the first fixing spring is connected between the first air inlet hole and the permanent magnet in the vertical direction, the lower end of the first air inlet hole is communicated with the inside of the insulating shell, the locking magnetic buckle is mounted in the movable conductive component through the second fixing spring, and the polarities of the two corresponding surfaces of the permanent magnet and the locking magnetic buckle are opposite;
the upper side wall of the insulating shell is provided with a sliding hole, the movable conductive component penetrates through the sliding hole, the lower side of the third air inlet hole is provided with a horizontally extending locking hole, the locking hole is communicated with the first air inlet hole and the sliding hole, when the static conductive component is communicated with the movable conductive component, the permanent magnet block corresponds to the locking magnetic buckle, and the locking magnetic buckle is positioned in the locking hole under the action of magnetic attraction to block the movement of the movable conductive component; when the vacuum degree in the insulating shell is increased and is higher than a preset value, the permanent magnet blocks overcome the elastic force of the first fixing spring to move downwards, the magnetic force of the locking magnetic buckle and the permanent magnet blocks is weakened when the locking magnetic buckle and the permanent magnet blocks are away from each other, and the locking magnetic buckle retracts into the movable conductive component under the action force of the second fixing spring to allow the movable conductive component to move;
the locking device further comprises a sealing sliding block, and the sealing sliding block is connected below the permanent magnet blocks.
5. The mining uninterruptible direct-current power supply control box according to claim 2, characterized in that: and the plunger moves upwards along with the movable conductive component after the static conductive component is separated from the movable conductive component so as to plug the air exhaust hole, thereby maintaining the vacuum degree in the insulating shell.
6. The mining uninterruptible direct-current power supply control box according to claim 2, characterized in that: the transmission device comprises a transmission rod and a support sleeve, the support sleeve is movably hinged with the insulating shell through a support frame, the transmission rod is inserted into the support sleeve in a sliding mode, one end of the transmission rod is hinged with the transmission sleeve, and the other end of the transmission rod is connected with the output end of the electromagnetic control device;
the transmission rod is sleeved with a transmission sliding block in a sliding mode, and the transmission sliding block is connected with the air inlet plug through a second return spring.
7. The mining uninterruptible direct-current power supply control box according to claim 1, characterized in that: the output end of the electromagnetic control device is an armature, the electromagnetic control device further comprises an electromagnet and a second connecting tension spring, the electromagnet is fixedly arranged, the armature is arranged on the opposite side of the electromagnet through the second connecting tension spring, and the armature is movably hinged with the transmission rod.
8. The mining uninterruptible direct-current power supply control box according to claim 2, characterized in that: the insulating shell comprises a movable end sealing cover, a ceramic pipe body and a static end sealing cover which are sequentially connected from top to bottom, the static conductive component comprises a static contact and a static conductive rod, the movable conductive component comprises a movable contact and a movable conductive rod, the static conductive rod is fixedly arranged on the static end sealing cover and extends to the inside of the insulating shell, the movable conductive rod is slidably arranged on the movable end sealing cover, and the static contact and the movable contact are respectively connected to the static conductive rod and the inner end of the movable conductive rod.
9. The mining uninterruptible direct-current power supply control box according to claim 8, characterized in that: the outer circumferential surfaces of the static contact and the moving contact are provided with insulating housings, shielding covers are installed in the insulating housings, and the static contact and the moving contact are located inside the shielding covers.
10. The mining uninterruptible direct-current power supply control box according to claim 7, characterized in that: the preset voltage of the main power supply is higher than the preset voltage of the standby power supply, the main power supply supplies power to the load circuit in a conventional state, and when the voltage of the main power supply is lower than the voltage of the standby power supply, the standby power supply is automatically switched to supply power to the load circuit; and when the voltage of the main power supply rises and is higher than a preset value, the main power supply is disconnected through the circuit breaker, and the standby power supply is switched to supply power to the load circuit.
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| CN202011385352.5A CN112583104B (en) | 2020-12-02 | 2020-12-02 | Mining uninterrupted direct current power supply control box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011385352.5A CN112583104B (en) | 2020-12-02 | 2020-12-02 | Mining uninterrupted direct current power supply control box |
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| CN112583104B CN112583104B (en) | 2023-05-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115654452A (en) * | 2022-12-26 | 2023-01-31 | 徐州市苏文机械设备制造有限公司 | Searchlight for coal mine tunnel |
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| CN105185647A (en) * | 2015-09-11 | 2015-12-23 | 西安交通大学 | Vacuum CROWBAR switch with variable air pressure and replaceable electrode |
| CN109066965A (en) * | 2018-08-29 | 2018-12-21 | 日立楼宇技术（广州）有限公司 | A kind of elevator emergency equipment and system |
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| CN112583104B (en) | 2023-05-16 |
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Effective date of registration: 20230324 Address after: 214200 Yongxing Village, HeQiao Town, Yixing City, Wuxi City, Jiangsu Province Applicant after: JIANGSU HINLI TECHNOLOGY INDUSTRY CO.,LTD. Address before: 214200 No.128 Ezhou South Road, HeQiao Town, Yixing City, Wuxi City, Jiangsu Province Applicant before: Liu Xiaoming |
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