CN110957700B - Automatic unlocking type transformer substation with emergency protection function - Google Patents
Automatic unlocking type transformer substation with emergency protection function Download PDFInfo
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- CN110957700B CN110957700B CN201911101816.2A CN201911101816A CN110957700B CN 110957700 B CN110957700 B CN 110957700B CN 201911101816 A CN201911101816 A CN 201911101816A CN 110957700 B CN110957700 B CN 110957700B
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- Prior art keywords
- unlocking
- voltage
- emergency protection
- temperature
- electronic lock
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
- E05B15/10—Bolts of locks or night latches
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
- E05B47/0002—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with electromagnets
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
- E05B47/0012—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with rotary electromotors
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B47/02—Movement of the bolt by electromagnetic means; Adaptation of locks, latches, or parts thereof, for movement of the bolt by electromagnetic means
- E05B47/026—Movement of the bolt by electromagnetic means; Adaptation of locks, latches, or parts thereof, for movement of the bolt by electromagnetic means the bolt moving rectilinearly
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B63/00—Locks or fastenings with special structural characteristics
- E05B63/14—Arrangement of several locks or locks with several bolts, e.g. arranged one behind the other
- E05B63/143—Arrangement of several locks, e.g. in parallel or series, on one or more wings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/047—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using a temperature responsive switch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/406—Temperature sensor or protection
Abstract
The embodiment of the invention discloses an emergency protection automatic unlocking type transformer substation, which comprises an anti-theft box body for protecting normal operation of a transformer operation, wherein a transformer assembly reduces and adjusts the high voltage of a high-voltage distribution network to a load normal power supply voltage, an emergency protection device for protecting safe operation of the transformer assembly is arranged between a primary winding of the transformer assembly and a high-voltage transmission line, the emergency protection device comprises a conductive contact connected with the primary winding of the transformer assembly and a connection reed arranged between the two conductive contacts, two support stand columns are arranged on a bottom base below the connection reed, a spring-driven thermal bimetallic strip is connected between the two support stand columns, a heat-conducting strip is pasted on the outer surface of the spring-driven thermal bimetallic strip, an insulating rubber pad is covered on the upper surface of the heat-conducting strip, and the connection reed is pushed to be disconnected to protect the transformer assembly from power failure; the scheme not only can realize emergency power-off protection, but also can realize intelligent self-energizing recovery voltage transformation work.
Description
Technical Field
The embodiment of the invention relates to the technical field of transformer substations, in particular to an emergency protection automatic unlocking type transformer substation.
Background
The transformer substation is a place for converting voltage and current, receiving electric energy and distributing electric energy in an electric power system. The transformer substation in the power plant is a boosting transformer substation, the effect of the boosting transformer substation is to boost the electric energy generated by the generator and feed the electric energy into a high-voltage power grid, and meanwhile, a step-down transformer substation is further arranged at the user end and used for stepping down the high-voltage power grid to a standard voltage and inputting the standard voltage to a power utilization end.
The box-type transformer substation is a typical representative of a transformer substation, is a high-voltage switch device, a distribution transformer and a low-voltage distribution device, is factory prefabricated indoor and outdoor compact distribution equipment which is integrated according to a certain wiring scheme, namely, the functions of transformer voltage reduction, low-voltage distribution and the like are organically combined together and installed in a steel structure box which is damp-proof, rust-proof, dust-proof, rat-proof, fire-proof, anti-theft, heat-insulating, totally-closed and movable, is particularly suitable for urban network construction and transformation, and is a brand-new transformer substation grown up after a civil transformer substation. The box-type transformer substation is suitable for mines, factory enterprises, oil-gas fields and wind power stations, replaces the original civil power distribution room and power distribution station, and becomes a novel complete set of power transformation and distribution device.
In order to avoid the overload condition of a transformer assembly in the working process, an emergency protection device is often used for protecting the transformer assembly of the whole box-type substation, but the existing emergency protection device is complex to control and needs to be manually powered on for resetting, so that the normal working efficiency of the substation is affected, in the prior art, locks of the substation are increasingly provided with locks needing to be powered on, such as electronic locks, intelligent locks and the like, when the emergency protection device is used for protecting and disconnecting the transformer assembly, the electronic locks are not directly supplied with power and lack of power drive, so that the electronic locks cannot be opened, and can only be pried, or the electronic locks are easily damaged, therefore, before the emergency protection device is used for disconnecting the transformer assembly, the automatic unlocking of the electronic locks needs to be controlled firstly, an electrician can conveniently enter, and the fault problem is quickly solved.
Disclosure of Invention
Therefore, the embodiment of the invention provides an emergency protection automatic unlocking type transformer substation, which adopts an elastic mechanism with self-recovery capability to drive the power-on and power-off operations of a switch-on reed, so that not only can emergency power-off protection be realized, but also intelligent self-power-on recovery voltage transformation work can be realized, and the problems that manual power-on reset is needed in the prior art, and the normal work efficiency of the transformer substation is low are solved.
In order to achieve the above object, an embodiment of the present invention provides an emergency protection automatic unlocking type transformer substation, including an anti-theft box for protecting normal operation of a transformer, a primary winding of a transformer assembly in the anti-theft box is connected to a high-voltage transmission line, a secondary winding of the transformer assembly in the anti-theft box is connected to a low-voltage power grid, the transformer assembly reduces and adjusts a high voltage of the high-voltage distribution network to a normal power supply voltage for a load, an emergency protection device for protecting safe operation of the transformer assembly is disposed between the primary winding of the transformer assembly and the high-voltage transmission line, the emergency protection device includes a conductive contact connected to the primary winding of the transformer assembly and a connection reed disposed between the two conductive contacts, two support columns are disposed on a base below the connection reed, a sprung thermal bimetallic strip is connected between the two support columns, the outer surface of the elastic thermal bimetallic strip is pasted with a heat conducting strip, the upper surface of the heat conducting strip is covered with a heat insulating rubber pad, the heat insulating rubber pad is fixedly connected with the switch-on reed through a contact, and the elastic thermal bimetallic strip is bent upwards to deform when being heated, so that the switch-on reed is pushed to be switched on and disconnected to carry out power-off protection on the voltage transformation assembly.
As a preferable scheme of the present invention, the heat conducting sheet includes aluminum heat collecting sheets hinged to each other, a vertical heat collecting sheet for enlarging a contact area with a heating surface of the voltage transformation assembly is disposed on a side surface of the aluminum heat collecting sheet, a heat conducting silver wire is laid on the vertical heat collecting sheet, an insertion hole is disposed inside each of the aluminum heat collecting sheets, and the elastic thermal bimetallic strip penetrates through the insertion hole of the aluminum heat collecting sheet and is connected to the support pillar.
As a preferable scheme of the invention, a T-shaped limiting groove is further formed on the aluminum heat collecting sheet below the inserting hole, and an I-shaped extrusion rubber pad is arranged between the inserting hole and the T-shaped limiting groove.
As a preferred scheme of the present invention, a temperature sensor for monitoring the working temperature of the primary winding in real time is further disposed on the primary winding of the voltage transformation assembly, the temperature sensor is connected to an over-temperature processing unit for calculating whether the working temperature of the primary winding is within a normal threshold range, the temperature sensor is connected to an input end of the over-temperature processing unit, and an output end of the over-temperature processing unit is connected to an alarm.
As a preferable scheme of the invention, the alarm temperature of the alarm is lower than the bending deformation temperature of the elastic thermal bimetallic strip, and after the alarm prompts that the working temperature of the voltage transformation assembly is higher than a normal threshold value, the temperature of a primary winding of the voltage transformation assembly continues to rise, and the elastic thermal bimetallic strip jacks up a connection reed to be disconnected.
As a preferable scheme of the invention, the output end of the over-temperature processing unit is further connected with an unlocking trigger switch for automatically unlocking the anti-theft box body, the working trigger temperature of the alarm is the same as that of the unlocking trigger switch, and the unlocking trigger switch drives the anti-theft box body to be opened to realize automatic unlocking before the elastic thermal bimetallic strip pushes the switch-on reed to be powered off.
According to a preferable scheme of the invention, a double anti-theft door is arranged on the anti-theft box body, the double anti-theft door comprises a left door plate and a right door plate on the anti-theft box body, a primary locking mechanism which is opened through facial information identification is arranged at the contact edge of the left door plate and the right door plate, a secondary electromagnetic adsorption lock mechanism which is opened through an electromagnetic ring is arranged at the upper end of each of the left door plate and the right door plate, the secondary electromagnetic adsorption lock mechanism is triggered to be electrified for double locking when the primary locking mechanism is unlocked, and the secondary electromagnetic adsorption lock mechanism is triggered to be powered off when the primary locking mechanism is locked.
As a preferred scheme of the invention, the primary locking mechanism comprises an electronic lock cylinder which is arranged on a right door plate and is driven by a driving mechanism to rotate, and a lock hole which is arranged in a left door plate, the electronic lock cylinder identifies identity through a face identification system, and regulates and controls the unlocking and locking operations of the electronic lock cylinder after identifying correct identity, a toothed ring is fixedly arranged at the inner end of the electronic lock cylinder, a cylindrical latch which is driven by the toothed ring is arranged below the electronic lock cylinder, a plurality of lower grooves which are meshed with the toothed ring are arranged on the surface of the cylindrical latch, the electronic lock cylinder can rotate after a key is inserted, and the cylindrical latch enters the lock hole of the left door plate under the driving of the toothed ring, so that the right door plate and the left door plate are locked.
As a preferred scheme of the present invention, the secondary electromagnetic adsorption lock mechanism includes electromagnets respectively disposed at upper end edges of a left door panel and a right door panel, magnetic metal blocks are disposed at contact positions of the dual security door with the left door panel and the right door panel, a power supply of the electromagnets is supplied by a low voltage component, a power supply interruption circuit is connected to a power supply circuit of the electromagnets, and access control systems for authenticating electromagnetic rings are disposed on surfaces of the left door panel and the right door panel, and are connected to the power supply interruption circuit.
As a preferred scheme of the present invention, the unlocking trigger switch is used for controlling the driving mechanism of the electronic lock cylinder to complete the unlocking operation, and the unlocking trigger switch and the face recognition system jointly drive the driving mechanism of the electronic lock cylinder to operate.
The embodiment of the invention has the following advantages:
(1) the invention utilizes real-time heat production index monitoring of the voltage transformation component to judge the temperature condition of the voltage transformation component during working, and when the temperature is too high, the spring mechanism sensitive to the temperature drives the power failure of the connected reed body, and after the temperature is reduced to a normal range, the spring mechanism resets due to the self-recovery capability and drives the connected reed body to be electrified again, thereby not only realizing emergency power failure protection, but also realizing intelligent self-powered recovery of voltage transformation working, and realizing unmanned intelligent stable monitoring of the voltage transformation circuit without manual control on-off of the connected reed.
(2) The emergency protection device controls the electronic lock cylinder to unlock before the voltage transformation component is disconnected, so that the situation that the electronic lock cylinder lacks a power supply and the whole anti-theft lock mechanism is damaged to open the box door after the voltage transformation component is powered off is avoided, and therefore when the working temperature of the voltage transformation component is too high, a worker can conveniently and rapidly and actively maintain the voltage transformation component through automatic unlocking of the anti-theft box body.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
Fig. 1 is a schematic overall structure diagram of an emergency protection device according to an embodiment of the present invention;
FIG. 2 is a schematic side view of a thermally conductive sheet according to an embodiment of the present invention;
fig. 3 is a block diagram of a regulation structure of an emergency protection device according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an anti-theft box according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a double-locking side view of the anti-theft box according to the embodiment of the present invention;
FIG. 6 is a schematic diagram of a double-locking top view of the anti-theft box according to the embodiment of the present invention;
FIG. 7 is a schematic diagram of a slot structure of a cutting hole of an anti-theft box according to an embodiment of the present invention;
FIG. 8 is a block diagram showing the opening of the anti-theft case according to the embodiment of the present invention;
in the figure:
1-anti-theft box body; 3-emergency protection means; 4-double security door; 5-a primary locking mechanism; 6-a secondary electromagnetic adsorption lock mechanism; 7-inserting holes; 8-T-shaped limiting grooves; 9-extruding the rubber pad by an I-shaped part; 10-a temperature sensor; 11-an over-temperature treatment unit; 12-an alarm; 13-unlocking trigger switch;
301-make reed; 302-support columns; 303-snapping a thermal bimetallic strip; 304-a thermally conductive sheet; 305-insulating rubber mat;
3041-aluminum heat collecting sheet; 3042-vertical heat collecting fin; 3043-thermally conductive silver wire;
401-left door panel; 402-right door panel;
501-an electronic lock cylinder; 502-keyhole; 503-toothed ring; 504-cylindrical bolt; 505-lower grooves; 506-cutting off the long hole; 507-semi-circular smooth fixture blocks; 508-anti-rotation raised strips; 509-cutting slot;
601-an electromagnet; 602-a magnetic metal block; 603-an interrupt circuit; 604-an access control system; 605-power switch button a; 606-power switch button B; 607-push protrusion.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. 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.
Example 1
The invention provides an emergency protection automatic unlocking type transformer substation which comprises an anti-theft box body 1 used for protecting normal operation of voltage transformation work, wherein a primary winding of a voltage transformation assembly in the anti-theft box body 1 is connected with a high-voltage power transmission line, a secondary winding of the voltage transformation assembly in the anti-theft box body 1 is connected with a low-voltage power grid, and the voltage transformation assembly reduces and adjusts high voltage of a high-voltage power distribution network to normal power supply voltage of a load.
The existing box-type substation is different from the prior art in main characteristics: (1) the current-carrying index of the transformer assembly is monitored in real time, and the energizing and de-energizing operations of the connection reed are driven by the elastic mechanism with self-recovery capability, so that not only can emergency power-off protection be realized, but also intelligent self-energizing recovery voltage transformation work can be realized, the connection and disconnection of the connection reed are not required to be controlled manually, and the stable monitoring of the voltage transformation circuit by unmanned intelligence is realized;
(2) in order to avoid the shortage of a power supply source for the electronic lock after the transformer assembly is disconnected, before the transformer assembly is subjected to power-off protection, the electronic lock of the box-type substation is unlocked, and maintenance personnel can conveniently enter and exit normally.
(3) When the box type transformation station is opened, the box type transformation station can be opened only by simultaneously unlocking the electronic lock and the electromagnetic ring, so that the safety level of the box type transformation station is improved, the anti-theft purpose is realized, and the box type transformation station can be widely applied to transformation stations in public places.
The specific implementation process is as follows: an emergency protection device 3 for protecting the transformer assembly to operate at a safe temperature is arranged between a primary winding of the transformer assembly and the high-voltage transmission line, and the emergency protection device 3 is used for protecting the transformer assembly from generating an over-temperature phenomenon during voltage reduction operation.
The emergency protection device 3 comprises conductive contacts connected with a primary winding of the transformer assembly and a switch-on reed 301 arranged between the two conductive contacts, two supporting columns 302 are arranged on a base below the switch-on reed 301, a spring-driven thermal bimetallic strip 303 is connected between the supporting columns 302, a heat-conducting strip 304 is pasted at the central position of the spring-driven thermal bimetallic strip 303, the upper surface of the heat-conducting strip 304 is covered with a heat-insulating rubber pad 305, and the heat-insulating rubber pad 305 is fixedly connected with the switch-on reed 301 through the contacts.
The installation position of the elastic thermal bimetallic strip 303 is positioned below the switch-on reed 301, and the elastic thermal bimetallic strip 303 is heated and then bends upwards to deform, so that the switch-on reed 301 is pushed to disconnect, and the transformer assembly is protected from power failure.
In the present embodiment, the on reed 301 may be a common knife switch, or may be another contact switch, and the present embodiment uses a knife switch as an example to refine the operation principle of the emergency protection device 3.
(1) First, the thermal bimetal 303 is elastically moved to act on the lower surface of the knife switch, and the thermal bimetal 303 is a composite material composed of two or more metals or other materials having suitable properties. The bimetallic strip is also called as a thermal bimetallic strip, and because the thermal expansion coefficients of all component layers are different, when the temperature changes, the deformation of the active layer is larger than that of the passive layer, so that the whole bimetallic strip can bend towards one side of the passive layer, and the curvature of the composite material changes to generate deformation.
(2) The heat-conducting strip 304 receives the temperature of the voltage transformation assembly, the temperature of the heat-conducting strip 304 changes along with the temperature change of the voltage transformation assembly, and the elastic thermal bimetallic strip 303 bends towards the knife switch after being heated by the heat-conducting strip 304, applies external force to the knife switch, pops the knife switch open, and disconnects the power supply to the voltage transformation assembly.
(3) When the heat-conducting strip 304 is no longer heated, the elastic thermal bimetallic strip 303 recovers to the original state, the knife switch is driven to be closed, the transformer assembly supplies power again, and normal boosting work is realized, so that emergency power-off protection is realized, and intelligent self-energizing transformation operation can be realized.
In this embodiment, the heat-insulating rubber pad 305 is in contact with the switch-on reed 301, the heat-insulating rubber pad 305 does not conduct heat, and the switch-on reed 301 is not damaged, and meanwhile, the heat-insulating property of the heat-insulating rubber pad 305 ensures that the temperature of the heat-conducting strip 304 cannot be dissipated, the temperature of the heat-conducting strip 304 is closest to the actual value of the voltage transformation assembly, so that the accuracy and the instantaneity of the elastic thermal bimetallic strip 303 for controlling the on-off of the switch are further improved, and the safety performance of the work of the emergency protection circuit control circuit is ensured.
Therefore, as one of the main characteristic points of the present invention, the heat conducting plate 304 in this embodiment is used as a medium for heat transfer, and the main function is to utilize the good heat conducting performance of itself to transfer the temperature of the transformer assembly to the elastic thermal bimetal 303 in real time, the elastic thermal bimetal 303 is deformed by heat, when the temperature of the transformer component is continuously raised, the switch is switched off by utilizing the deformation of the elastic thermal bimetallic strip 303, the transformer component is not switched off and does not work any more, when the temperature of the transformer component is reduced, the elastic thermal bimetallic strip 303 is gradually restored to the original state, the transformer component is electrified and works again, thereby driving the power-on and power-off operation of the connection reed through the elastic mechanism with self-recovery capability, therefore, emergency power-off protection can be realized, intelligent self-power-on recovery voltage transformation work can be realized, manual control on-off of the connected reed is not needed, and unmanned intelligent stable monitoring on the voltage transformation circuit is realized.
According to the above, the heat-conducting strip 304 needs to follow the deformation of the spring thermal bimetal 303, and it is also needed to ensure the close contact between the heat-conducting strip 304 and the spring thermal bimetal 303.
Therefore, the heat conducting sheet 304 of the present embodiment includes a plurality of aluminum heat collecting sheets 3041 hinged to each other, the aluminum heat collecting sheet 3041 is a vertical heat collecting sheet 3042 on a side cross section contacting with the transformer assembly for enlarging a contact area, a heat conducting silver wire 3043 is laid on the vertical heat collecting sheet 3042, and the lower surfaces of all the aluminum heat collecting sheets 3041 are provided with insertion holes 7 for fixing the elastic thermal bimetal 303.
The elastic thermal bimetal 303 sequentially passes through the insertion holes 7 in all the aluminum heat collecting plates 3041, and since all the aluminum heat collecting plates 3041 are hinged to each other, a certain degree of freedom of movement is provided between the aluminum heat collecting plates 3041, and the elastic thermal bimetal 303 can bend along with the deformation of the elastic thermal bimetal 303, so as to ensure that the elastic thermal bimetal 303 does not interfere with the deformation of the elastic thermal bimetal 303, and ensure the stability of the elastic thermal bimetal 303 controlling the on/off of the reed 301.
The vertical heat collecting sheet 3042 is closely attached to the transformer assembly, and since the heat conductivity of silver is the best in the metal material, the heat conducting silver wire 3043 is laid on the vertical heat collecting sheet 3042, so that the heat of the transformer assembly can be timely conducted to the vertical heat collecting sheet 3042 and the aluminum heat collecting sheet 3041.
In addition, in order to avoid that the weight of the heat conducting strip 304 is too large to affect the normal deformation of the elastic thermal bimetal strip 303, in this embodiment, the heat conducting strip 304 is made of aluminum, so that the heat conducting strip has good heat conducting performance and light weight, and has small influence on the deformation of the elastic thermal bimetal strip 303.
In order to ensure that the surface of the elastic thermal bimetallic strip 303 is in close contact with the aluminum heat collecting plate 3041, the elastic thermal bimetallic strip 303 below the insertion hole 7 is further provided with a T-shaped limiting groove 8, and an I-shaped heat-conducting silica gel 9 is arranged between the insertion hole 7 and the T-shaped limiting groove 8.
The i-shaped heat conducting silica gel 9 extrudes the bouncing heat bimetallic strip 303 to be closely contacted with the aluminum heat collecting plate 3041, meanwhile, the i-shaped heat conducting silica gel 9 can transmit the heat of the aluminum heat collecting plate 3041 to the bouncing heat bimetallic strip 303, so that the bouncing heat bimetallic strip 303 is guaranteed to be heated and deformed in time, and the i-shaped heat conducting silica gel 9 has elasticity and does not influence the normal deformation of the bouncing heat bimetallic strip 303.
When the temperature of the surface of the transformer assembly is detected to exceed the safety range, the transformer assembly is required to be powered off, and meanwhile, an alarm is required to be sent out to remind related workers of daily monitoring, so that the surface of a primary winding of the transformer assembly is also provided with a temperature sensor 10 for monitoring the working temperature in real time, the temperature sensor 10 is connected with an over-temperature processing unit 11, the temperature sensor 10 is connected with the input end of the over-temperature processing unit 11, and the output end of the over-temperature processing unit 11 is connected with an alarm 12.
Preferably, the alarm temperature of the alarm 12 is slightly lower than the bending deformation temperature of the elastic thermal bimetallic strip 303, that is, when the working temperature of the voltage transformation assembly is close to the highest safety temperature, the alarm processing is performed, and then the power supply function of the low-voltage end of the voltage transformation assembly is utilized to supply power to the over-temperature processing unit 11 before the power failure of the elastic thermal bimetallic strip 303.
Example 2
As shown in fig. 4, be equipped with dual burglary-resisting door 4 on the theftproof box 1, dual burglary-resisting door 4 includes left door plant 401 and the right door plant 402 on the theftproof box 1, the contact limit of left side door plant 401 and right door plant 402 is equipped with the one-level locking mechanical system 5 of opening through electronic information discernment, the upper end of left side door plant 401 and right door plant 402 all is equipped with the second grade electromagnetism adsorption latch mechanism 6 of opening through the electromagnetic ring, one-level locking mechanical system 5 is supplied power by the low-voltage end of vary voltage subassembly, trigger when one-level locking mechanical system 5 unblanks the circular telegram of second grade electromagnetism adsorption latch mechanism 6 carries out double locking trigger when one-level locking mechanical system 5 locks second grade electromagnetism adsorption latch mechanism 6 outage.
As shown in fig. 5 and 6, the unlocking mode of the primary locking mechanism 5 is specifically:
(1) an electronic lock cylinder 501 which is unlocked automatically by a driving mechanism is arranged on the right door plate 402, and a lock hole 502 is arranged in the left door plate 401, so that the driving mechanism is controlled to rotate automatically to unlock after the electronic lock cylinder 501 system identifies the identity, and the electronic lock cylinder 501 system in the prior art is used for identifying the identity, namely, the driving mechanism rotates automatically to unlock after the identity is identified.
(2) A toothed ring 503 is fixedly arranged at the inner side end of the electronic lock cylinder 501, a cylindrical bolt 504 driven by the toothed ring 503 is arranged below the electronic lock cylinder 501, and a plurality of lower grooves 505 meshed with the toothed ring 503 are formed in the surface of the cylindrical bolt 504.
When the electronic lock cylinder 501 is used for automatically locking a door, after the electronic lock cylinder 501 identifies identity, the toothed ring 503 is driven to rotate by the action of the driving mechanism, and the cylindrical bolt 504 enters the lock hole 502 of the left door panel 401 under the driving of the toothed ring 503, so that the right door panel 402 and the left door panel 401 are locked.
When the electronic lock cylinder 501 is automatically unlocked, after the electronic lock cylinder 501 identifies, the toothed ring 503 is driven to rotate reversely by the driving mechanism, the cylindrical bolt 504 is driven by the toothed ring 503 to exit from the lock hole 502 of the left door panel 401, and the right door panel 402 and the left door panel 401 can be opened.
(3) The right door plate 402 is internally provided with a cut-off long hole 506 for limiting the position of the cylindrical bolt 504, the lower end of the cut-off long hole 506 is provided with a semicircular smooth fixture block 507, the inner wall of the semicircular smooth fixture block 507 is provided with two anti-rotation protruding strips 508 parallel to the central axis of the semicircular smooth fixture block 507, and the corresponding position of the cylindrical bolt 504 is provided with a cutting slot 509 capable of clamping the anti-rotation protruding strips 508.
When the cylindrical bolt 504 moves left and right, the cylindrical bolt slides along the inner surface of the semicircular smooth fixture block 507 of the cut-off long hole 506, so that the friction force is small, the use is convenient, the anti-rotation protruding strips 508 and the cut slots 509 are mutually clamped, the cylindrical bolt 504 can be prevented from randomly rotating on the inner surface of the semicircular smooth fixture block 507, and therefore the cylindrical bolt 504 and the toothed ring 503 can be ensured to be always in the mutually meshed position through the limiting effect of the semicircular smooth fixture block 507 on the cylindrical bolt 504, and the working stability of the primary locking mechanism 5 is ensured.
In addition, the upper surface of the truncated long hole 506 is provided with a cutting groove 609, the cutting groove 609 is positioned right below the cylindrical latch 504, the toothed ring 503 is meshed with the cylindrical latch 504 through the cutting groove 609 for transmission, the position of the toothed ring 503 is not changed, and the position of the truncated long hole 506 is not changed, so that the toothed ring 503 can realize the stable movement of the cylindrical latch 504 in the truncated long hole 506 as long as being meshed with the cylindrical latch 504 through the cutting groove 609 until the cylindrical latch 504 enters the lock hole 502 of the left door panel 401, the displacement stability of the cylindrical latch 504 is further improved, and the locking stability of the primary locking mechanism 5 is ensured.
As shown in fig. 7 and 8, the two-stage electromagnetic adsorption lock mechanism 6 includes electromagnets 601 respectively disposed at the upper end edges of the left door panel 401 and the right door panel 402, a magnetic metal block 602 is disposed at the contact position between the dual security door 4 and the left door panel 401 and the right door panel 402, the power supply of the electromagnet 601 is supplied by the low-voltage end of the voltage transformation component, and a power supply interruption circuit 603 is connected to the power supply circuit of the electromagnet 601.
After being electrified, the electromagnet 601 generates strong suction force to firmly adsorb the left door panel 401 and the right door panel 402 with the magnetic metal block 602 of the anti-theft box body 1, so that the left door panel 401 and the right door panel 402 are locked.
The surfaces of the left door plate 401 and the right door plate 402 are both provided with an access control system 604 for authenticating the electromagnetic ring, and the access control system 604 is connected with the power supply interruption circuit 603. When the door control system 604 identifies that the information of the electromagnetic ring is correct, the power supply interruption circuit 603 is controlled to cut off the power of the electromagnet 601, and the electromagnetic lock can open the door when the attraction force of the electromagnetic lock is lost.
It should be added that the power supplies of the access control system 604 and the electromagnet 601 are both supplied with power from the low-voltage end of the voltage transformation component, and the power supply interruption circuit 603 has a timing characteristic, that is, after the access control system 604 identifies the identity, the power supply interruption circuit 603 is used to temporarily cut off the power supply of the electromagnet 601, and after the power supply suspension time is reached, the power supply interruption circuit 603 does not cut off the power supply circuit of the electromagnet 601, and the electromagnet 601 resumes supplying power.
A power supply switch button A605 is arranged in the lock hole 502 of the left door panel 401, the power supply switch button A605 is connected with a power line of the electromagnet 601 of the left door panel 401, a power supply switch button B606 is arranged in the cut-off long hole 506 of the right door panel 402, the power supply switch button B606 is connected with the power line of the electromagnet 601 of the right door panel 402, and the power supply switch button A605 and the power supply switch button B606 respectively control the locking condition of the left door panel 401 and the locking condition of the right door panel 402.
Pushing protrusions 607 are arranged at the left end and the right end of the upper surface of the cylindrical bolt 504, the cylindrical bolt 504 moves left and right under the driving of the lock cylinder, and the pushing protrusions 607 push the power supply switch button A605 and the power supply switch button B606 to be powered on and powered off simultaneously.
When the cylindrical bolt 504 moves under the driving of the lock cylinder, the cylindrical bolt 504 moves leftwards to enter the lock hole 502 of the left door plate 401, the normal locking of the first-level locking mechanism 5 is realized, when the cylindrical bolt 504 moves leftwards, the pushing protrusions 607 at the two ends of the cylindrical bolt 504 are respectively pushed leftwards, the power supply switch button A605 and the power supply switch button B606 are pushed to be opened, the power supply to the power end of the electromagnet 601 is disconnected, therefore, when the door is normally locked, the first-level locking mechanism 5 is normally locked, the second-level electromagnetic adsorption lock mechanism 6 is disconnected and does not work, the power supply is saved, and unnecessary waste is avoided.
Therefore, when the primary locking mechanism 5 is locked, the pushing protrusion 607 on the cylindrical bolt 504 controls the switch button a605 and the power supply switch button B606 to be switched off, the electromagnets 601 on the left door panel 401 and the right door panel 402 are powered off, and after the primary locking mechanism 5 is locked, the secondary electromagnetic adsorption lock mechanism 6 is in a switched-off state, and the locking of the left door panel 401 and the right door panel 402 is controlled only by the primary locking mechanism 5.
The first-stage locking mechanism 5 and the second-stage electromagnetic adsorption lock mechanism 6 are ingeniously combined together, so that the control is simple, the operation is convenient, the realization is easy, and the anti-theft lock mechanism can be widely applied to the anti-theft function of the box type transformer station.
When the cylindrical bolt 504 moves under the driving of the key cylinder, the cylindrical bolt 504 moves rightwards to exit the lock hole 502 of the left door panel 401, and the primary locking mechanism 5 is unlocked, when the cylindrical bolt 504 moves rightwards, the pushing protrusions 607 at the two ends of the cylindrical bolt 504 push rightwards respectively, and the power supply switch button a605 and the power supply switch button B606 are pushed to be closed.
As shown in fig. 5, that is, when the cylindrical latch 504 enters the locking hole 502 in the left door panel 401 and is locked, the pushing protrusion 607 entering the locking hole 502 pushes the power switch button a605 to be turned off, and the pushing protrusion 607 in the cutout long hole 506 pushes the power switch button B606 to be turned off.
The power supply switch button a605 is installed at a boundary position close to the left door panel 401, and the power supply switch button B606 is installed at a boundary position far from the left door panel 401, so that the stability of the switch control of the power supply switch button a605 and the power supply switch button B606 is ensured.
When the cylindrical bolt 504 exits the lock hole 502 in the left door panel 401 to unlock, the pushing protrusion 607 in the lock hole 502 pushes the power supply switch button a605 in the opposite direction, and the pushing protrusion 607 in the truncated long hole 506 pushes the power supply switch button B606 in the opposite direction. The realization is to the power supply of electro-magnet 601 power end, consequently when one-level locking mechanical system 5 unblanked, and double locking is realized to second grade electromagnetic absorption latch mechanism 6, needs secondary discernment personnel's identity.
The invention is characterized in that when the primary locking mechanism 5 is unlocked and locked, the secondary electromagnetic adsorption lock mechanism 6 is triggered to perform opposite locking and unlocking operations, so that a secondary unlocking procedure is ensured, and when the primary locking mechanism 5 is locked, the secondary electromagnetic adsorption lock mechanism 6 is powered off, so that normal door locking operation is ensured, and unnecessary electric quantity waste is also saved.
In summary, the locking mode of the secondary electromagnetic adsorption lock mechanism 6 is mainly completed by the door locking operation of the cylindrical bolt 504, and the unlocking mode of the secondary electromagnetic adsorption lock mechanism 6 is mainly completed by the identity recognition operation of the access control system 604.
Therefore, the secondary electromagnetic adsorption lock mechanism 6 works by means of the primary locking mechanism 5, when the primary locking mechanism 5 is unlocked, the pushing protrusion 607 on the cylindrical bolt 504 controls the electric switch button A605 and the power supply switch button B606 to be closed, the electromagnets 601 on the left door panel 401 and the right door panel 402 are driven to be electrified, even after the primary locking mechanism 5 is unlocked, the left door panel 401 and the right door panel 402 are still in a closed state, secondary identification is required to be carried out by using the access control system 604, the electrified connection of the electromagnets 601 is temporarily disconnected after the identity is determined, and the left door panel 401 and the right door panel 402 are opened.
As a third main characteristic point of the present invention, to open the box-type substation of the present invention, the dual security doors can be opened only by dual identification, and the dual security doors can be opened only by opening the primary locking mechanism 5 and then opening the secondary electromagnetic absorption lock mechanism 6 in sequence, so that for a single mechanical lock or electronic lock, the present invention can further improve the security level of the box-type substation by combining the locking modes of the mechanical lock and the electronic lock, thereby achieving the purpose of theft prevention.
Example 3
According to the working principle of the first-stage locking mechanism 5 and the second-stage electromagnetic adsorption lock mechanism 6, it should be particularly noted that the first-stage locking mechanism 5 specifically utilizes the basic control of the electronic lock, and the second-stage electromagnetic adsorption lock mechanism 6 utilizes the basic control of the electromagnetic lock, so that the first-stage locking mechanism 5 and the second-stage electromagnetic adsorption lock mechanism 6 both need power supply to realize the basic working process of unlocking and locking.
As shown in fig. 8, after the transformer assembly is disconnected by the emergency circuit protection device 3, the electronic lock cylinder 501 cannot be opened, and only the lock can be pried to damage the electronic lock to open the door, and since the electronic lock cylinder 501 also controls the locking of the secondary electromagnetic adsorption lock mechanism 6, it is obvious that the lock is pried to damage the electronic lock and the electromagnetic lock, and the security door completely fails, so that the electronic lock needs to be automatically controlled to automatically open the door before the transformer assembly is disconnected by the emergency circuit protection device, and the specific working process will be described in detail below.
The output end of the over-temperature processing unit 11 in the emergency protection device 3 is further connected with an unlocking trigger switch 13, the working trigger temperature of the alarm 12 is the same as that of the unlocking trigger switch 13, the alarm 12 starts to alarm because the alarm temperature according to the alarm 12 is slightly lower than the bending deformation temperature of the elastic thermal bimetallic strip 303, that is, the unlocking trigger switch 13 independently triggers the driving mechanism of the electronic lock cylinder 501 to control the electronic lock cylinder 501 to automatically unlock.
That is, the unlocking trigger switch 13 is used for controlling the driving mechanism of the electronic lock cylinder 501 to complete the unlocking operation, and the unlocking trigger switch 13 and the face recognition system jointly drive the driving mechanism of the electronic lock cylinder 501 to operate.
When the voltage transformation assembly works normally, the identity recognition system of the electronic lock cylinder 501 regulates and controls the driving mechanism to automatically unlock and lock the electronic lock cylinder 501, and when the working temperature of the voltage transformation assembly is abnormal, the unlocking trigger switch 13 triggers the driving mechanism of the electronic lock cylinder 501 to control the electronic lock cylinder 501 to automatically unlock.
As a fourth main characteristic point of the present invention, the emergency protection device of the present invention controls the electronic lock cylinder 501 to unlock before the voltage transformation component is disconnected, so as to prevent the electronic lock cylinder 501 from losing power supply after the voltage transformation component is powered off and the whole anti-theft lock mechanism from being damaged to open the box door, thereby the anti-theft implementation process is more stable and safe.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
1. The utility model provides an automatic unlocking-type transformer substation of emergency protection, is including the theftproof box (1) that is used for protecting vary voltage work normal operating, vary voltage subassembly primary winding in the theftproof box (1) is connected with high voltage transmission line, vary voltage subassembly secondary winding in the theftproof box (1) is connected with the low voltage power grid, the high voltage of vary voltage subassembly with high voltage distribution network reduces the adjustment to load normal supply voltage, be equipped with emergency protection device (3) that are used for protecting vary voltage subassembly safe operation between the primary winding of vary voltage subassembly and high voltage transmission line, its characterized in that: the emergency protection device (3) comprises conductive contacts connected with a primary winding of the transformer assembly and a connection reed (301) arranged between the two conductive contacts, two support columns (302) are arranged on a base below the connection reed (301), a spring-driven thermal bimetallic strip (303) is connected between the two support columns (302), a heat conducting strip (304) is pasted on the outer surface of the spring-driven thermal bimetallic strip (303), a heat insulating rubber pad (305) covers the upper surface of the heat conducting strip (304), the heat insulating rubber pad (305) is fixedly connected with the connection reed (301) through contacts, the spring-driven thermal bimetallic strip (303) bends upwards to deform when being heated, and the connection reed (301) is pushed to be disconnected to protect the transformer assembly from power failure;
the heat conducting sheet (304) comprises aluminum heat collecting sheets (3041) which are hinged to each other, vertical heat collecting sheets (3042) used for enlarging the contact area with the heating surface of the voltage transformation component are arranged on the side surfaces of the aluminum heat collecting sheets (3041), heat conducting silver wires (3043) are paved on the vertical heat collecting sheets (3042), inserting holes (7) are formed in all the aluminum heat collecting sheets (3041), and the elastic heat bimetal sheet (303) penetrates through the inserting holes (7) of the aluminum heat collecting sheets (3041) and is connected with the supporting upright column (302);
the aluminum heat collecting sheet (3041) below the inserting hole (7) is further provided with a T-shaped limiting groove (8), and an I-shaped extrusion rubber gasket (9) is arranged between the inserting hole (7) and the T-shaped limiting groove (8).
2. An emergency protection auto-unlocking substation according to claim 1, characterized in that: still be equipped with temperature sensor (10) that is used for real-time supervision primary winding operating temperature on the primary winding of vary voltage subassembly, temperature sensor (10) are connected with and are used for calculating whether primary winding operating temperature is in normal threshold value scope excess temperature processing unit (11), and temperature sensor (10) with the input of excess temperature processing unit (11) is connected, the output of excess temperature processing unit (11) is connected with alarm (12).
3. An emergency protection auto-unlocking substation according to claim 2, characterized in that: the alarm temperature of the alarm (12) is lower than the bending deformation temperature of the elastic thermal bimetallic strip (303), after the alarm (12) prompts that the working temperature of the voltage transformation assembly is higher than a normal threshold value, the temperature of a primary winding of the voltage transformation assembly continues to rise, and the elastic thermal bimetallic strip (303) jacks up the connection reed (301) to be disconnected.
4. An emergency protection auto-unlocking substation according to claim 3, characterized in that: the output end of the over-temperature processing unit (11) is further connected with an unlocking trigger switch (13) for automatically unlocking the anti-theft box body (1), the working trigger temperature of the alarm (12) is the same as that of the unlocking trigger switch (13), and before the elastic thermal bimetallic strip (303) pushes the switch-on reed (301) to power off, the unlocking trigger switch (13) drives the anti-theft box body (1) to be opened to realize automatic unlocking.
5. An emergency protection auto-unlocking substation according to claim 4, characterized in that: be equipped with dual burglary-resisting door (4) on theftproof box (1), dual burglary-resisting door (4) are including left door plant (401) and right door plant (402) on the theftproof box (1), the contact limit of left side door plant (401) and right door plant (402) is equipped with one-level locking mechanical system (5) of opening through facial information recognition, the upper end of left side door plant (401) and right door plant (402) all is equipped with second grade electromagnetic adsorption latch mechanism (6) of opening through the electromagnetic ring trigger when one-level locking mechanical system (5) are unblanked second grade electromagnetic adsorption latch mechanism (6) circular telegram carry out the double locking trigger when one-level locking mechanical system (5) are blocked second grade electromagnetic adsorption latch mechanism (6) outage.
6. An emergency protection auto-unlocking substation according to claim 5, characterized in that: the primary locking mechanism (5) comprises an electronic lock cylinder (501) which is arranged on the right door panel (402) and is driven by a driving mechanism to rotate, and a lock hole (502) arranged inside the left door panel (401), wherein the electronic lock cylinder (501) identifies through a face recognition system, and regulates and controls the unlocking and locking operations of the electronic lock cylinder (501) after identifying the correct identity, a toothed ring (503) is fixedly arranged at the inner end of the electronic lock cylinder (501), a cylindrical bolt (504) driven by a toothed ring (503) is arranged below the electronic lock cylinder (501), the surface of the cylindrical bolt (504) is provided with a plurality of lower grooves (505) which are mutually engaged with the toothed ring (503), the electronic lock cylinder (501) can rotate after a key is inserted, and the cylindrical bolt (504) enters the lock hole (502) of the left door panel (401) under the driving of the toothed ring (503), so that the right door panel (402) and the left door panel (401) are locked.
7. An emergency protection auto-unlocking substation according to claim 5, characterized in that: second grade electromagnetic adsorption latch mechanism (6) including setting up electro-magnet (601) at left door board (401) and right door board (402) upper end border position respectively, dual burglary-resisting door (4) go up with the contact position of left door board (401) and right door board (402) is equipped with magnetic metal piece (602), the power of electro-magnet (601) is supplied power by the low voltage subassembly, and be connected with power supply interrupt circuit (603) on the power supply circuit of electro-magnet (601), the surface of left door board (401) and right door board (402) all is equipped with access control system (604) that are used for authentication electric magnetic ring, access control system (604) are connected with power supply interrupt circuit (603).
8. An emergency protection auto-unlocking substation according to claim 6, characterized in that: the unlocking trigger switch (13) is used for controlling a driving mechanism of the electronic lock cylinder (501) to complete unlocking work, and the unlocking trigger switch (13) and the face recognition system jointly drive the driving mechanism of the electronic lock cylinder (501) to work.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911101816.2A CN110957700B (en) | 2019-11-12 | 2019-11-12 | Automatic unlocking type transformer substation with emergency protection function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911101816.2A CN110957700B (en) | 2019-11-12 | 2019-11-12 | Automatic unlocking type transformer substation with emergency protection function |
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| CN110957700B true CN110957700B (en) | 2021-09-24 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1191402A (en) * | 1997-10-05 | 1998-08-26 | 黄杰 | Transformer switch combination unit |
| CN207392945U (en) * | 2017-11-06 | 2018-05-22 | 广西华网电气有限公司 | A kind of safety lock for power distribution cabinet |
| CN109961990A (en) * | 2017-12-22 | 2019-07-02 | 南京萨特科技发展有限公司 | A kind of protection element and protective module |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9564753B2 (en) * | 2012-05-21 | 2017-02-07 | Emprimus, Llc | Transformer protection circuit and method |
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2019
- 2019-11-12 CN CN201911101816.2A patent/CN110957700B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1191402A (en) * | 1997-10-05 | 1998-08-26 | 黄杰 | Transformer switch combination unit |
| CN207392945U (en) * | 2017-11-06 | 2018-05-22 | 广西华网电气有限公司 | A kind of safety lock for power distribution cabinet |
| CN109961990A (en) * | 2017-12-22 | 2019-07-02 | 南京萨特科技发展有限公司 | A kind of protection element and protective module |
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