CN106452111A - Power supply method of intrinsically safe power and intrinsically safe power system - Google Patents
Power supply method of intrinsically safe power and intrinsically safe power system Download PDFInfo
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- CN106452111A CN106452111A CN201611047885.6A CN201611047885A CN106452111A CN 106452111 A CN106452111 A CN 106452111A CN 201611047885 A CN201611047885 A CN 201611047885A CN 106452111 A CN106452111 A CN 106452111A
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- Prior art keywords
- intrinsic safety
- electric source
- power
- power supply
- circuit
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
-
- 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
- H02J9/061—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 for DC powered loads
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Emergency Protection Circuit Devices (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a power supply method of intrinsically safe power and an intrinsically safe power system, and relates to downhole power supply technology; the method comprises: from the power supply side of a switch or cable junction box of a downhole power supply system, leading out branch wire power via a power branch wire; limiting safety and power of the branch wire power led out to obtain intrinsically safe power for powering intrinsically safe loads; supplying the intrinsically safe power to the corresponding intrinsically safe load by using an intrinsically safe output port. The stability of intrinsically safe power supply can be improved.
Description
Technical field
The present invention relates to underground power supply used technology, more particularly to a kind of method of supplying power to of intrinsic safety electric source and intrinsic safety electric source system.
Background technology
Fig. 1 is that electric power system schematic diagram is being used in the down-hole that prior art is provided, as shown in figure 1, three phase supply main switch 10
Positioned at access adit, control tunnel power supply inlet wire 1, on-load switch 30 is located at work surface, powers to induction-motor load 40, always
Generally at a distance of hundreds of rice to several kms between switch 10 and on-load switch 40, there is 14 connection cable of multiple rosettees centre.Three-phase
The voltage of power supply inlet wire 1 is introduced always by cable entry 4 in 127V～10KV scope, 127V～10KV electric power incoming line 1
Switch 10 after, successively supply connection winch switch 11 winch, connection pump switch 13 water pump, connected load switch 30 electricity
Motivation 40.The system-specific such as gas-monitoring intrinsic safety electric source 2 draws several kms to enter work surface from electric substation, powers to gas probe 3.
Underground coal mine three phase supply supply voltage is in 127V～10KV scope, and single-phase voltage is 36V, is not essential safety
System.So-called intrinsic safety system (hereinafter referred to as the essence safety system) refers to that for the circuit of explosive atmosphere or partial circuit be this
The electrical equipment for interconnecting in combination, the i.e. system of the electric equipment interconnecting parts of matter safety circuit adopts intrinsicallysafecircuit, makes
System can be used for explosive atmosphere.
Essential safe type is a kind of type of explosion proof construc tion, and it is by device interior and the connecting wire for being exposed to potential explosive atmosphere
Issuable electric spark or heat effect energy are limited in the level that can not light.For non-inductive circuit, spark ignition gas
Level be 50 watts, intrinsically safe circuit can light gas in no instance, and therefore the output of intrinsically safe circuit is less, tool
Say, output should be less than 50 watts body.The current application such as underground monitoring, monitoring, Internet of Things requires that intrinsic safety electric source is powered, this
The low power intrinsic safety electric source of sample far can not meet requirement.
In addition, the civilian power supply in ground can mounting receptacle everywhere, can easily draw power supply with socket.But down-hole intrinsic safety is supplied
Never intrinsic safety electric source seat in electric system.Some switches carry intrinsic safety electric source 200 and export, and supply to the loads such as start-stop button (202)
Electricity, also without socket, and is arranged on switch load side, and after disconnecting switch disconnects, the intrinsic safety electric source for being arranged on switch load side does not have
There is output, the instrument now powered by intrinsic safety electric source, instrument, sensor etc. can not all work, it is clear that can not meet demand.
Underworkings distance, needs a few km intrinsic safety electric source lines, and intrinsic safety electric source output is not less than 50 watts, due to this
Peace power supply does not typically allow used in parallel, therefore must draw when to a lot of instruments, instrument, sensor power very long, a lot
Circuit, be not easy to multiple stage intrinsic safety electric source and work respectively, constrain Internet of Things, big data transmission and information technology pushing away in down-hole
Wide application.
If intrinsic safety electric source takes from the load side of on-load switch, as shown in figure 1, the switch in on-load switch 30 carries intrinsic safety
Power supply 200, after disconnecting switch disconnects, intrinsic safety electric source 200 is not exported, but the power supply supply side of disconnecting switch has electricity.If from
Power supply supply side draws intrinsic safety electric source, it becomes possible to more stably powers to intrinsic safety load, and is not affected by disconnecting switch folding.
But, all draw not over control line wiring mouth 5 in the power supply supply side of underground power supply system on-load switch both at home and abroad at present
The precedent of intrinsic safety electric source.Main cause is as follows：
First, the load power of supply main is very big, and the cross-section of cable is usually 25mm2～95mm2, voltage be 380V, 660V or
1140V, intrinsic safety electric source power is less than 50 watts, and the branch line section for supplying power for typically is adopted discounting for mechanical strength
1.5mm2It is sufficient that holding wire.
For example, the short circuit protection and setting value of main switch 10 is short-circuited with d1 point and carries out calculating checking, it is ensured that the short circuit of d1 point
When can action message cut off the electricity supply, if from the mains side of on-load switch 30, a section is drawn by control line wiring mouth
1.5mm2Branch line, if only 1 meter long, by equivalent resistance calculate, equivalent to 63 meters of long sections be 95mm2Cable, or about suitable
It is 35mm in 38 meters of long sections2Cable.Obviously the cable that so grows not in short-circuit protection scope of design, branch cable end
In the event of short circuit, short-circuit protection may be failure to actuate, and cause gas and dust explosion.
2nd, in actually used, the stress levels of small bore signal cable are also all relatively low, it is impossible to access 380V, 660V or
1140V electric power system.
3rd, the branch line that draws from on-load switch power supply supply side d1 point is not controlled by on-load switch, when on-load switch has a power failure,
Branch cable also has electricity, and when without short-circuit protection, it is easy to cause the accident.
Content of the invention
It is an object of the invention to provide a kind of method of supplying power to of intrinsic safety electric source and intrinsic safety electric source system, preferably can improve
The stability that intrinsic safety electric source is powered.
According to an aspect of the invention, there is provided a kind of method of supplying power to of intrinsic safety electric source, including：
Branch line power supply is drawn in the switch of underground power supply system or the power supply supply side of cable coupling box via power distribution cable；
Safety is carried out to the branch line power supply of the extraction and Power Limitation is processed, obtain the sheet for powering for intrinsic safety load
Peace power supply；
Using intrinsic safety delivery outlet, the intrinsic safety electric source is supplied to corresponding intrinsic safety load.
Preferably, using power limitation device, safety is carried out to the branch line power supply and Power Limitation is processed.
Preferably, also include：
The power limitation device is integrated with the power distribution cable, the intrinsic safety delivery outlet, and is used outside
Insulant or Secure Shell encapsulation, form the intrinsic safety electric source seat of safety.
Preferably, the intrinsic safety electric source seat of the safety is installed in the shell of switch, motor, cable coupling box or miscellaneous equipment
Internal outer surface, middle board, wiring cavity.
Preferably, the power limitation device includes：
Circuit is introduced, for the branch line power supply of the extraction is carried out blood pressure lowering and AC-DC conversion process；
Inversion rises frequency circuit, for the introducing circuit output is carried out raising frequency process, obtains high-frequency electrical；
Blood pressure lowering isolation circuit, for carrying out blood pressure lowering isolation processing to the high-frequency electrical；
Rectification limit energy circuit, the unidirectional current for obtaining to the blood pressure lowering isolation processing carries out rectification limit and can process, obtains
Intrinsic safety electric source of the output less than 50 watts.
Preferably, the introducing circuit is single phase bridge type rectifier circu or single-phase transformers circuit.
Preferably, the introducing circuit is bidirectional triode thyristor circuit or three-phase bridge rectifier circuit or three-phase capacitance-resistance rectified current
Road.
According to a further aspect in the invention, there is provided a kind of intrinsic safety electric source system, including：
Power distribution cable, draws branch line electricity for the power supply supply side of the switch in underground power supply system or cable coupling box
Source；
Power limitation device, is processed for carrying out safety and Power Limitation to the branch line power supply of the extraction, obtain for
For the intrinsic safety electric source that intrinsic safety load is powered；
Intrinsic safety delivery outlet, for being supplied to corresponding intrinsic safety load by the intrinsic safety electric source.
Preferably, the power limitation device is integrated with the power distribution cable, the intrinsic safety delivery outlet, and outside
Encapsulated with insulant or Secure Shell, form the intrinsic safety electric source seat of safety.
Preferably, the intrinsic safety electric source seat of the safety is installed in the shell of switch, motor, cable coupling box or miscellaneous equipment
Internal outer surface, middle board, wiring cavity.
Compared with prior art, the beneficial effect of the embodiment of the present invention is：
The intrinsic safety electric source that the embodiment of the present invention is taken out less than 50 watts from switch, cable coupling box or miscellaneous equipment is different
Intrinsic safety load is powered, and when the switch load side has a power failure, intrinsic safety electric source remains to normal power supply, it is ensured that intrinsic safety load obtains stable
Intrinsic safety electric source is supplied, and improves the stability that intrinsic safety is powered.
Description of the drawings
Fig. 1 is that electric power system schematic diagram is being used in the down-hole that prior art is provided；
Fig. 2 is the method for supplying power to block diagram of intrinsic safety electric source provided in an embodiment of the present invention；
Fig. 3 is the structured flowchart of the intrinsic safety electric source of the present invention；
Fig. 4 is provided in an embodiment of the present invention based on down-hole in the intrinsic safety electric source seat installation site signal with supply line
Figure；
Fig. 5 is the structural representation of intrinsic safety electric source seat provided in an embodiment of the present invention；
Fig. 6 is the front view of power distribution cable shown in Fig. 5；
Fig. 7 is the first structure figure for introducing circuit shown in Fig. 5；
Fig. 8 is the second structure chart for introducing circuit shown in Fig. 5；
Fig. 9 is the 3rd structure chart for introducing circuit shown in Fig. 5；
Figure 10 is the 4th structure chart for introducing circuit shown in Fig. 5；
Figure 11 is the 5th structure chart for introducing circuit shown in Fig. 5；
Figure 12 is the circuit diagram of intrinsic safety electric source seat provided in an embodiment of the present invention；
Figure 13 is the schematic diagram that intrinsic safety electric source seat provided in an embodiment of the present invention is integrated with cable packages；
Description of reference numerals：1-127V～10KV electric power incoming line；The special intrinsic safety electric source of 2-；3- gas is popped one's head in；4- cable draws
Enter device；5- control line wiring mouth；10- main switch；11- winch is switched；13- pump switch；14- cable coupling box；D1- short circuit
Point；30- on-load switch；40- motor；41- is installed in the intrinsic safety electric source seat of load motor enclosure；42- switch load side；
50- is not by the power supply supply side of the control of on-load switch 30；52- is installed in the intrinsic safety electric source seat of 30 enclosure of on-load switch；56-
The intrinsic safety electric source seat being integrated with the casting of power distribution cable cable in cable coupling box 14；70- is installed in main switch 10
The intrinsic safety electric source seat of board in flameproof enclosure；74- is not by the power supply supply side of the control of main switch 10；80- intrinsic safety electric source seat
Outlet；81- intrinsic safety load；82- introduces circuit；83- inversion rises frequency circuit；84- high frequency voltage descending isolation circuit；85- stabilivolt；
86- current-limiting resistance；87- rectification limit can circuit；88- intrinsic safety delivery outlet；89- intrinsic safety conversion module；Outside 90- insulation or insulation blocking
Skin；The circuit supporting plate of 91- intrinsic safety electric source seat；142- screw pad；The fixed connection point of 143- wire and screw pad；144- power supply
Branch line；145- plus can shield the insulated conductor of surrounding layer；The junction point of 146- wire and intrinsic safety electric source seat；147- controllable silicon blood pressure lowering
Circuit；148- screw；200- switch carries intrinsic safety electric source；202- start-stop button；The shell of 244- intrinsic safety electric source seat；246- encapsulation
Use insulation filler；The circuit board of 248- intrinsic safety electric source seat；250- intrinsic safety output cable.
Specific embodiment
Below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail, it will be appreciated that described below is excellent
Select embodiment to be merely to illustrate and the present invention is explained, be not intended to limit the present invention.
Fig. 2 is the method for supplying power to block diagram of intrinsic safety electric source provided in an embodiment of the present invention, as shown in Fig. 2 step includes：
Step S101：Draw via power distribution cable in the switch of underground power supply system or the power supply supply side of cable coupling box
Branch line power supply.
Step S102：Safety is carried out to the branch line power supply of the extraction and Power Limitation is processed, obtain for negative for intrinsic safety
The intrinsic safety electric source that lotus is powered.
Using power limitation device, execution step S102.
The introducing circuit for processing for blood pressure lowering and AC-DC conversion that the power limitation device includes to be sequentially connected, for
The inversion that raising frequency is processed rises frequency circuit, the blood pressure lowering isolation circuit for blood pressure lowering isolation processing, limits treatable rectification for rectification
Limit can circuit.Wherein, introducing circuit is used for the branch line Power convert of the extraction being AC or DC electricity, can specifically adopt
Any one in single phase bridge type rectifier circu, single-phase transformers circuit, three-phase bridge rectifier circuit, three-phase capacitance-resistance rectification circuit etc.
Individual；Inversion rises frequency circuit to be used for for the electric current raising frequency being converted to being processed as high frequency electric；It is right that blood pressure lowering isolation circuit is used for
The high frequency electric carries out blood pressure lowering isolation processing；The unidirectional current that rectification limit energy circuit is used for obtaining the blood pressure lowering isolation processing enters
Row rectification limit can be processed, and obtain intrinsic safety electric source of the output less than 50 watts.
Step S103：Using intrinsic safety delivery outlet, the intrinsic safety electric source is supplied to corresponding intrinsic safety load.
Power limitation device can be integrated with power distribution cable, intrinsic safety delivery outlet, form intrinsic safety electric source seat.By
The outside encapsulation bonding agent of intrinsic safety electric source seat, forms the intrinsic safety electric source seat of encapsulation explosion-proof type.The intrinsic safety electric source seat of the encapsulation explosion-proof type
May be mounted at the middle board of main switch, the housing wiring cavity of explosion-proof on-load switch or outer surface, motor load switch connect
The position such as line cavity or housing outer surface, the housing wiring cavity of cable coupling box or outer surface, ensure taken out less than 50
Watt intrinsic safety electric source be that different intrinsic safety loads carries out stable power-supplying.
Fig. 3 is the structured flowchart of intrinsic safety electric source of the present invention, as shown in figure 3, including power distribution cable, power limitation device and this
Peace delivery outlet.
Power distribution cable, its connection switch of underground power supply system or the power supply supply side of cable coupling box, in down-hole
The power supply supply side of the switch of electric power system or cable coupling box draws branch line power supply.
Power limitation device, which passes through to connect the power distribution cable access branch line power supply, for the extraction
Branch line power supply carries out safety and Power Limitation is processed, and obtains the intrinsic safety electric source for powering for intrinsic safety load；
Intrinsic safety delivery outlet, which passes through to connect power limitation device access intrinsic safety electric source, and by connecting intrinsic safety load
Intrinsic safety electric source supply intrinsic safety load is used.
Fig. 4 is provided in an embodiment of the present invention based on down-hole in the intrinsic safety electric source seat installation site signal with supply line
Figure, as shown in figure 4,127V～10KV electric power incoming line 1 introduces main switch 10 by cable entry 4, the power supply of introducing via
Cable coupling box 14 is supplied to the motor 40 of connected load switch 30.
Intrinsic safety electric source seat is may be mounted on equipment, for example, is fixed on the cable on the middle board of main switch 10, explosion-proof and is connect
The housing wiring cavity of line box 14 or outer surface, the housing wiring cavity of explosion-proof on-load switch 30 or outer surface, motor load 40
The wiring cavity of switch or housing outer surface.Fixed form can be adopted and is screwed, is bonded in shell surfaces externally and internally, magnet adsorption
In surfaces externally and internally, using loudspeaker nozzle, locking locking is scheduled on shell termination.Further, cable connection can also be arranged on
In box, specifically, the circuit board 248 of intrinsic safety electric source seat is integrated with the casting of 144 cable of power distribution cable, connects installed in cable
In line box 14, as 56 institute of intrinsic safety electric source seat being integrated with the casting of power distribution cable cable in cable coupling box 14 of Fig. 4
Show, cable one end connection alternating current power supply of power distribution cable 144 is not by the mains side 50 of the on-off control, the sheet of intrinsic safety electric source seat 56
Peace output cable outwards exports intrinsic safety electric source through the termination of rosette 14；Cable one end of the power supply lead wire 144 also may be used
The load side 42 of the control of on-load switch 30 is connected to, and is arranged in the rosette of on-load switch 30 or motor 40, from rosette
Wiring mouth in draw intrinsic safety seat outlet.
In conjunction with Fig. 4, concrete installation site is as follows：
Position 1
From down-hole the main switch 10 with supply line the power supply supply side 74 not controlled by the main switch 10, via electricity
Source branch line 144 draws branch line power supply.The intrinsic safety electric source seat 70 that the end of the power distribution cable 144 is accessed in flameproof enclosure, and
Installed in the enclosure interior of main switch 10, such as on the middle board of main switch 10, it should be noted that install here
Intrinsic safety electric source seat without epoxy encapsulation, and can only install Secure Shell isolation additional.The branch line power supply of extraction is through overvoltage electricity
Rheology obtains intrinsic safety electric source after changing, and exports from the outlet 80 of intrinsic safety electric source seat 70.
Position 2
From connection line of the down-hole in the cable coupling box 14 with supply line, branch line is drawn via power distribution cable 144
Power supply, wherein, the connection line in the cable coupling box 14 is not controlled by on-load switch 30, is electricity with respect to on-load switch 30
Source supply side.Intrinsic safety electric source seat 56 is accessed in the end of the power distribution cable 144, and in cable coupling box 14, further
Ground, power distribution cable cable is integrated with the casting of intrinsic safety electric source seat 56, in cable coupling box 14.The branch line power supply warp of extraction
Intrinsic safety electric source being obtained after overvoltage current transformation, and is exported from the outlet 80 of intrinsic safety electric source seat 56, uses for intrinsic safety load 81.
Position 3
From down-hole in the power supply supply side 50 not controlled by the on-load switch 30 of the on-load switch 30 with supply line or
The switch load side 42 being controlled, draws branch line power supply via power distribution cable 144.The end of the power distribution cable 144 is accessed
Intrinsic safety electric source seat 52 is simultaneously arranged on equipment, that is, be arranged on 30 housing outer surface of on-load switch.The branch line power supply of extraction is through electricity
Intrinsic safety electric source is obtained after current voltage conversion, and exports intrinsic safety voltage and current from the outlet 80 of intrinsic safety electric source seat 52, negative for intrinsic safety
Lotus 81 uses.
Position 4
From down-hole in the power supply supply side of the motor 40 with supply line, branch line power supply is drawn via power distribution cable 144,
Intrinsic safety electric source seat 41 is accessed, and is arranged on 40 housing outer surface of motor.The branch line power supply of extraction is after voltage current transformation
Intrinsic safety electric source is obtained, and is exported from the outlet 80 of intrinsic safety electric source seat 41, use for intrinsic safety load 81.
Wherein, above-mentioned power distribution cable 144 can be the cable of general cable connection lead, or structure shown in Fig. 6
Connecting lead wire.It is possible to further one end of the close alternating current power supply in power distribution cable 144, short-circuit protection thermal element is set, this
Sample, when intrinsic safety electric source seat 52 or line related are short-circuited, by the short-circuit protection thermal element, stops power distribution cable 144
Power supply.
The minimum line to line fault electric current of 144 end of power distribution cable is more than or equal to the main switch 10 for protecting the end power distribution cable
The short-circuit setting valve of short-circuit protection, or the power distribution cable 144 is converted to section 50mm according to equivalent resistance2Characteristic chamber length is little
In 20m, or it is converted to section 1.5mm2Characteristic chamber length is less than 0.6m, and 144 stress levels of power distribution cable, mechanical strength, absolutely
Edge shielding propertiess meet the requirements, and meet security control requirements.
Fig. 5 is the structural representation of intrinsic safety electric source seat provided in an embodiment of the present invention, as shown in figure 5, including：Power supply lead wire
144, introducing circuit 82, inversion liter frequency circuit 83, high frequency voltage descending isolation circuit 84, rectification limit energy circuit 87, intrinsic safety delivery outlet 88,
Intrinsic safety conversion module 89, insulation or insulation blocking crust 90, insulation filler or circuit supporting plate 91, by above-mentioned device by diagram
Electrical connection sequential combination is together.
As a example by installed in the intrinsic safety electric source seat 52 of 30 housing outer surface of on-load switch, intrinsic safety electric source seat 52 includes：One piece
Intrinsic safety conversion module 89, the conversion module 89 is with input/output interface circuit, the bonding agent encapsulation such as outside epoxy resin, shape
Become the intrinsic safety electric source seat of pouring type explosion-proof type.The intrinsic safety electric source seat 52 is connected to the mains side not controlled by the switch 30, and
On equipment.When using intrinsic safety electric source, " plug " of intrinsic safety load is connected on the intrinsic safety electric source seat 52, described
Can also include on peace power socket 52 for wired, wireless or photoelectricity transmission controller.
Conversion module 89 has includes rectification, blood pressure lowering, inversion, raising frequency, high frequency voltage descending, rectification, the function of limit energy.Specifically
Say, conversion module 89 introduces 127V～10KV branch line power supply via power distribution cable 144；The 127V of introducing 82 pairs of introducings of circuit～
10KV branch line power supply carries out AC-DC conversion, becomes unidirectional current；Inversion rises 83 DC inverters being converted to of frequency circuit
High frequency voltage, is added in high frequency voltage in high frequency voltage descending isolation circuit 84 (such as transformator), is isolated by transformer pressure-reducing, high
Low pressure is isolated, and exporting rectification limit energy circuit 87 carries out rectification limit energy；Rectification limit energy circuit 87 is connected to intrinsic safety delivery outlet 88, leads to
Cross intrinsic safety delivery outlet 88 to be connected with intrinsic safety load.
Intrinsic safety electric source seat is may be mounted on switch and other device housings, as " socket " of intrinsic safety electric source, works as needs
During intrinsic safety electric source, " plug " of intrinsic safety load is connected to " socket " upper.
Also can be comprising for wired, wireless or photoelectricity transmission controller on the intrinsic safety change-over panel 91 of intrinsic safety electric source seat 52.
By above-described embodiment, intrinsic safety electric source seat is fixedly mounted on switch, motor housing outer surface, can use anti-uncaging
It is fixed on termination, or with the more covert position on shell of epoxy bond, to avoid increasing housing profile size.
Intrinsic safety electric source pedestal product very little as shown in Figure 5, can be made into miniature intrinsic safety seat, and can turn power with high voltage
It is changed to the very low intrinsic safety voltage of power very little, voltage.
Fig. 6 is the front view of power distribution cable shown in Fig. 5, as shown in fig. 6, passing through for drawing the power distribution cable of branch line power supply
Wiring mouth introduces wire connection cavity, if exposed on power -line terminal line ball nut have more than 3 buttons, can draw power supply with screw pad 142
Branch line, is screwed in screw pad 142 on nut.If exposed be less than 3 buttons, clamp nut can be backed out, remove on former line ball and block
Pawl, changes claw pad and draws power distribution cable.Wherein, screw pad 142 can be plain cushion, or claw pad.
Above-mentioned introducing circuit includes：The blood pressure lowering link that the element tandem compound such as resistance, electric capacity, controllable silicon becomes, to reduce electricity
Pressure input, or by the elements such as series capacitance, switch, relay cut-off and the DC channel of three-phase electrical source of power, or series connection is molten
The protection elements such as disconnected device, relay carry out after overcurrent protection, or rectification rectification again after blood pressure lowering, or blood pressure lowering again, or three-phase capacitance-resistance or
Three-phase bridge is introduced, or single-phase bridge is introduced, or bidirectional triode thyristor is introduced, or single-phase transformers are introduced.The embodiment of the present invention is with Fig. 7 extremely
As a example by introducing circuit shown in Figure 11, different application circuit can be selected according to actual needs, wherein, DC inversion be become exchange
And to be increased to the circuit of high frequency be prior art, can select from textbook or online download, high frequency transformer, stabilivolt, current limliting
Resistance etc. is all commercially available.
Fig. 7 is the first structure figure for introducing circuit shown in Fig. 5, as shown in fig. 7, introducing circuit 82 to adopt unidirectional bridge rectifier
Circuit, it is also possible to which Switching Power Supply is introduced.After branch line power supply introducing single phase bridge type rectifier circu carries out AC-DC conversion process, enter one
Step carries out blood pressure lowering process by reduction voltage circuit 147.
Reduction voltage circuit 147 can adopt controllable silicon reduction voltage circuit, and the blood pressure lowerings such as stabilivolt may also be employed.
Further, the exchange input section shown in Fig. 7, can adopt resistance-capacitance circuit parallel connection blood pressure lowering.
Fig. 8 is the second structure chart for introducing circuit shown in Fig. 5, as shown in figure 8, introducing circuit 82 to adopt three-phase bridge rectification
Circuit, can use silicon controlled rectifier.
Additionally, introduce circuit 82 can also be using the three-phase capacitance-resistance rectification circuit shown in Fig. 9, bidirectional triode thyristor shown in Figure 11
Circuit, and the single-phase transformers circuit shown in Figure 10.
Figure 12 is the circuit diagram of intrinsic safety electric source seat provided in an embodiment of the present invention, in fig. 12, via power distribution cable
144 introduce branch line power supplys, and using the branch line plant-grid connection as introduce circuit 82 three-phase bridge rectifier circuit input power.
Three-phase bridge rectifier circuit is carried out to branch line power supply after AC-DC conversion, is obtained unidirectional current, and is exported to inversion liter frequency circuit 83.
Inversion rises 83 pairs of unidirectional currents of frequency circuit and carries out raising frequency process, obtains high frequency electric, and exports tremendously high frequency blood pressure lowering isolation circuit
84.High frequency voltage descending isolation circuit 84 adopts transformator, the high frequency electric is carried out after blood pressure lowering isolation processing, exports and limits to rectification
Can circuit.The rectification limit energy circuit includes the stabilivolt 85 for blood pressure lowering and the resistance 86 for current limliting, and the rectification limits energy
Circuit is carried out to the unidirectional current after blood pressure lowering isolation processing after rectification limit can process, and obtaining output, to be less than 50 watts of intrinsic safety electric
Source, and export via intrinsic safety delivery outlet 88.
Figure 13 is the schematic diagram that intrinsic safety electric source seat provided in an embodiment of the present invention is integrated with cable packages, as Figure 13 institute
Show, be integrated with the cable packages of power distribution cable 144, be a part for the cable, intrinsic safety electric source seat shell 244 has enough machines
Tool intensity and insulating properties, or cable rubber crust.The circuit board 248 of intrinsic safety electric source seat is by encapsulation insulation filler
246 encapsulation, or cable rubber-covered.Intrinsic safety output cable 250 is connected with the circuit board 248 of intrinsic safety electric source seat, from this
Peace power socket shell 244 and encapsulation are drawn with insulation filler 246.
The circuit board 248 of intrinsic safety electric source seat is designed and produced according to relevant standard, is mounted in and is made of plastics or epoxy resin
In the intrinsic safety electric source seat shell 244 of insulation, intrinsic safety electric source seat shell 244 is filled out with insulation with encapsulation with enough mechanical strengths
246 encapsulation of thing is filled, for example, is fixedly mounted on plate in the switch with epoxy resin encapsulation, or be bonded in binding agents such as epoxy resin
Where in flameproof enclosure, space is larger, power distribution cable is connected with mains side inlet wire in switch, by intrinsic safety output lead with connect
Line chamber binding post is connected, the intrinsic safety electric source seat 70 in flameproof enclosure of the installation main switch 10 in such as Fig. 4, or fixed installation
In switch, motor housing outer surface, can be scheduled on termination with locking locking, or more hidden on shell with epoxy bond
Where secret, in case increasing housing profile size.By taking the intrinsic safety electric source seat 70 in main switch 10 as an example, it is fixedly mounted on
On the middle board of main switch 10, it is also possible to binding agents such as epoxy resin, it is bonded in where in flameproof enclosure, space is larger, will
The power distribution cable of extraction is connected with power supply supply side inlet wire in switch, and intrinsic safety output lead is connected with the binding post of wire connection cavity
Connect.
For example, long 0.5 meter, 2.5 square millimeters of section is specially designed, is met the 1140v of underground power supply used requirement, carries ground wire
Shielded cable as power distribution cable 144, intrinsic safety electric source seat shell 244 is using having enough mechanical strengths and insulating properties
Flame retardant plastics is made, or cable rubber crust.The circuit board 248 of intrinsic safety electric source seat can be used insulation filler by encapsulation
Epoxy resin 246 is encapsulated, or cable rubber-covered, is integrated with cable packages, becomes a part for the cable.Application
When, as shown in figure 4, power distribution cable 144 is connected with the power -line terminal of cable coupling box 14, intrinsic safety output cable 250 is by connecing
Line apparatus output is used to 14 outside of cable coupling box for intrinsic safety load 81.
In sum, the present invention has following technique effect：
1st, due to just having electricity where down-hole someone work, where having electricity, just there are switch or cable coupling box, the present invention
Embodiment can from each switch or cable coupling box take out intrinsic safety electric source, the intrinsic safety electric source power of taking-up add up be one very
Big numeral, that is to say, that can provide general power sufficiently large power supply for a lot of intrinsic safety loads.
2nd, prior art installs an intrinsic safety electric source in electric substation or near the access adit branch switch, by special line length away from
From the work surface intrinsic safety load with less than 50 watts of power as tunnel is powered, and the intrinsic safety load of the embodiment of the present invention is general
Close with a distance from switch and cable coupling box in tunnel, so the intrinsic safety electric source line of distance need not be elongated, with respect to existing
Technology has substantial progress.
3rd, prior art goes out intrinsic safety electric source in switch load side draw, and load side has a power failure, and intrinsic safety electric source does not just have an electricity yet, and this
Inventive embodiments draw intrinsic safety electric source from the mains side of switch or cable coupling box, when the switch load side has a power failure, intrinsic safety electric source
Normal power supply is remained to, the stability for making intrinsic safety power has substantial advance, for example, after main switch 10 has a power failure, intrinsic safety seat 70 is still
So intrinsic safety electric source can be exported, power to monitoring system.
4th, the embodiment of the present invention makes intrinsic safety electric source seat supply such as ground by increasing intrinsic safety electric source seat for underground power supply system
The socket of electricity is the same, greatly facilitates intrinsic safety and powers, be easy to supervisory control system running, with respect to the existing skill without intrinsic safety electric source seat
Art, with substantial advance.
5th, the intrinsic safety electric source seat of the embodiment of the present invention is together with cable packages, and the intrinsic safety electric source seat need not be with bolt etc.
Fastening means are fixed on device housings, can be connected with cable and are arranged in facility terminal cabinet, very convenient.
6th, the intrinsic safety electric source seat of the embodiment of the present invention is may be installed on any equipment, due to the sheet of dangerous voltage
Peace translation circuit is packed, and in antiknock device rosette, the intrinsic safety electric source after conversion, by termination, draws
Go out to the surface of outside facility terminal cabinet, therefore can achieve the high safety reliability that intrinsic safety is powered.
Although above the present invention is described in detail, but the invention is not restricted to this, those skilled in the art of the present technique
Various modifications can be carried out according to the principle of the present invention.Therefore, all modifications that is made according to the principle of the invention, all should be understood to
Fall into protection scope of the present invention.
Claims (10)
1. a kind of method of supplying power to of intrinsic safety electric source, it is characterised in that include：
Branch line power supply is drawn in the switch of underground power supply system or the power supply supply side of cable coupling box via power distribution cable；
Safety is carried out to the branch line power supply of the extraction and Power Limitation is processed, obtain the intrinsic safety electricity for powering for intrinsic safety load
Source；
Using intrinsic safety delivery outlet, the intrinsic safety electric source is supplied to corresponding intrinsic safety load.
2. method according to claim 1, it is characterised in that using power limitation device, the branch line power supply is carried out
Safety and Power Limitation are processed.
3. method according to claim 2, it is characterised in that also include：
The power limitation device is integrated with the power distribution cable, the intrinsic safety delivery outlet, and is insulated in outside
Material or Secure Shell encapsulation, form the intrinsic safety electric source seat of safety.
4. method according to claim 3, it is characterised in that the intrinsic safety electric source seat of the safety is installed in switch, electricity
The housing surfaces externally and internally of mechanical, electrical cable rosette or miscellaneous equipment, middle board, wiring cavity.
5. according to Claims 2 or 3 or 4 methods describeds, it is characterised in that the power limitation device includes：
Circuit is introduced, for the branch line power supply of the extraction is carried out blood pressure lowering and AC-DC conversion process；
Inversion rises frequency circuit, for the introducing circuit output is carried out raising frequency process, obtains high-frequency electrical；
Blood pressure lowering isolation circuit, for carrying out blood pressure lowering isolation processing to the high-frequency electrical；
Rectification limit energy circuit, the unidirectional current for obtaining to the blood pressure lowering isolation processing carries out rectification limit and can process, exported
Intrinsic safety electric source of the power less than 50 watts.
6. method according to claim 5, it is characterised in that the introducing circuit is single phase bridge type rectifier circu or single-phase
Transformer circuit.
7. method according to claim 5, it is characterised in that the introducing circuit is bidirectional triode thyristor circuit or three-phase bridge
Formula rectification circuit or three-phase capacitance-resistance rectification circuit.
8. a kind of intrinsic safety electric source system, it is characterised in that include：
Power distribution cable, draws branch line power supply for the power supply supply side of the switch in underground power supply system or cable coupling box；
Power limitation device, processes for carrying out safety and Power Limitation to the branch line power supply of the extraction, obtains for for originally
The intrinsic safety electric source that peace load is powered；
Intrinsic safety delivery outlet, for being supplied to corresponding intrinsic safety load by the intrinsic safety electric source.
9. system according to claim 8, it is characterised in that the power limitation device and the power distribution cable, described
Intrinsic safety delivery outlet is integrated, and outside insulant or Secure Shell encapsulation, forms the intrinsic safety electric source seat of safety.
10. system according to claim 9, it is characterised in that the intrinsic safety electric source seat of the safety is installed in switch, electricity
The housing surfaces externally and internally of mechanical, electrical cable rosette or miscellaneous equipment, middle board, wiring cavity.
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| CN201611047885.6A CN106452111B (en) | 2016-11-25 | 2016-11-25 | Power supply method of intrinsic safety power supply and intrinsic safety power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611047885.6A CN106452111B (en) | 2016-11-25 | 2016-11-25 | Power supply method of intrinsic safety power supply and intrinsic safety power supply system |
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| CN106452111B CN106452111B (en) | 2020-06-02 |
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Cited By (1)
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| CN113840494A (en) * | 2021-09-30 | 2021-12-24 | 深圳市拓海通用电气有限公司 | External vehicle-mounted power supply wall box |
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| CN106452111B (en) | 2020-06-02 |
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