CN206818822U - A kind of underground electrical equipment grounding monitoring and controlling system - Google Patents
A kind of underground electrical equipment grounding monitoring and controlling system Download PDFInfo
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- CN206818822U CN206818822U CN201720106848.1U CN201720106848U CN206818822U CN 206818822 U CN206818822 U CN 206818822U CN 201720106848 U CN201720106848 U CN 201720106848U CN 206818822 U CN206818822 U CN 206818822U
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- earthing pole
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Abstract
The utility model discloses a kind of underground electrical equipment grounding monitoring and controlling system, is related to field of coal mine safety, including：The earthing pole of underground electrical equipment；Grounding monitor supervising device, inside or outside earthing pole；Wherein, the grounding monitor supervising device includes：Power supply is measured, for being powered for device；Resistance measuring instrument; it is connected between the measurement power supply and the earthing pole; the measurement power supply, the resistance measuring instrument, the earthing pole is set to form current detection circuit by the earth; and according to the electric current that the earthing pole is flowed through in the current detection circuit; grounding resistance resistance is determined, the monitoring result of the resistance comprising the grounding resistance is transferred to monitoring protection facility on underground or well.By the utility model embodiment, real time on-line monitoring, and fail secure and/or alarm in imperfect earth can be carried out to underground electrical equipment grounding situation, extremely hanging locking is especially grounded, mine safe power supply reliability can be greatly improved.
Description
Technical field
Field of coal mine safety is the utility model is related to, more particularly to a kind of underground electrical equipment grounding monitoring and controlling system.
Background technology
《Safety regulations in coal mine》Chapter 10, Section of six regulation：Underground electrical equipment must have ground protection, it is necessary to which installation makes
With earth leakage protective device, and periodically carry out leakage tripping experiment.《Three big protection detailed rules and regulations of underground coal mine power supply》Regulation is used per season
Earthing megohm meter measure grounding resistance once, and monthly at least does a distance leakage testing.Ground protection must use earthing pole,
When leak detection relay is tested it is necessary that with earthing pole, but without finding the hanging locking of relevant earthing pole and connect in various data
The report of the realtime on-line monitoring method of ground situation.Wherein, the hanging locking of earthing pole refers to, when earthing pole is hanging, on earthing pole
It can not send non-intrinsic safety voltage, or cut-out to be grounded the device power supply (DPS) of pole protection, danger alarm signal sent if necessary, to ensure to pacify
It is complete reliable.Due to the hanging locking of no earthing pole and realtime on-line monitoring method this two technologies of situation are grounded, earthing pole
Grounding safety reliability is difficult to ensure that.
So-called earthing pole is hanging, refers to that for some reason, earthing pole is not embedded in coal seam by regulation, but all leakages
Outside coal seam, grounding resistance is caused to greatly increase.Fig. 1 is the test for ground principle schematic that prior art provides, and is such as being connect
By the experiment electric leakage Reliability of Microprocessor of test button 3 when earth polar is hanging, it will 660V voltages are passed through test resistance 1, test button 3
Normal opened contact, guide on earthing pole 5, " electric spark " may occur on hanging earthing pole 5, cause actuation gas coal dust or
Cause personal electric shock.
Utility model content
A kind of underground electrical equipment grounding monitoring and controlling system provided by the utility model, it is therefore an objective to solve prior art without
Method is grounded the problem of extremely hanging locking and real time on-line monitoring earthing pole ground connection situation, can so as to greatly improve grounding safety
By property.
A kind of underground electrical equipment grounding monitoring and controlling system provided by the utility model, including：
The earthing pole of underground electrical equipment；
Grounding monitor supervising device, inside or outside the earthing pole；
Wherein, the grounding monitor supervising device includes：
Power supply is measured, for being powered for device；
Resistance measuring instrument, it is connected between the measurement power supply and the earthing pole, makes the measurement power supply, the resistance
Measuring instrument, the earthing pole form current detection circuit by the earth, and connect according to being flowed through in the current detection circuit
The electric current in earth polar, grounding resistance resistance is determined, the monitoring result of the resistance comprising the grounding resistance is transferred to underground
Or monitoring protection facility on well.
Preferably, the grounding monitor supervising device also includes actuating mechanism, and the actuating mechanism is connected to the measurement
Between power supply and the resistance measuring instrument, its contact is connected to the supply line of the leak(age) test device of the underground electrical equipment
In, the supply line for the leak(age) test device to the underground electrical equipment carries out on/off control.
Preferably, the measurement power supply, the actuating mechanism, the resistance measuring instrument are encapsulated by insulating materials.
Preferably, in addition to：
The protection device for the prevention short circuit being fixed on the earthing pole metal shell or inclined-plane, for preventing the ground connection
The electric current outflow detection line and electric current of monitoring device flow into metal shell short circuit of the detection line by the earthing pole.
Preferably, the protection device of the prevention short circuit includes：
Middle conductor, it flows out the wire of detection line or electric current inflow detection line with electric current and is connected；
Insulator, it is laid in middle conductor surrounding.
Preferably, the earthing pole is tubular earthing pole, and the grounding monitor supervising device is arranged on the tubular ground connection
The hollow part or outside of pole.
Preferably, the earthing pole is earth plate, and the grounding monitor supervising device is arranged on the outside of the earth plate.
The technical scheme that the utility model embodiment provides has the advantages that：
By the utility model embodiment, real time on-line monitoring can be carried out to underground electrical equipment grounding situation, and
Fail secure and/or alarm during imperfect earth, extremely hanging locking is especially grounded, mine safe power supply can be greatly improved can
By property.
Brief description of the drawings
Fig. 1 is the test for ground principle schematic that prior art provides；
Fig. 2 is that the grounding resistance monitoring and controlling system first being arranged in equipment that the utility model embodiment provides is illustrated
Figure；
Fig. 3 is that the grounding resistance monitoring and controlling system second installed in equipment that the utility model embodiment provides is illustrated
Figure；
Fig. 4 is that the grounding resistance monitoring principle being arranged in tubular earthing pole that the utility model embodiment provides is shown
It is intended to；
Fig. 5 is K that the utility model embodiment provides to figure；
Fig. 6 is the grounding resistance monitoring principle schematic for the grounded screen that the utility model embodiment provides；
Description of reference numerals：1- test resistances；3- tests button；The tubular local auxiliary earth poles of 5-；6- monitorings are set
Apply；7- grounding resistance monitoring devices, and its equivalent circuit, resistance, diode, or access capacitance-resistance are also can access if necessary
Absorbing circuit etc., to prevent high voltage damage intrinsically safe circuit；9- resistance measuring instruments；91- current samples module, 92- processors,
93- communication modules；11- relays or similar actuating of relay device, its output contact is j1；13- measures power supply；15- is examined
Survey line a；16- is grounded；17- output lines；19- detection lines b insulated hull；21- detection lines b wire；25- ground connection inspections
Survey earth electrode special；26- grounded screens；27- earthing poles inclined-plane；The main ground connection office of 29- earth leakage protective devices or the office of miscellaneous equipment
Portion's earthing pole or grounded screen or measurement of Grounding Resistance earth electrode special.
Embodiment
Preferred embodiment of the present utility model is described in detail below in conjunction with accompanying drawing, it will be appreciated that described below
Preferred embodiment be merely to illustrate and explain the utility model, be not used to limit the utility model.
A kind of underground electrical equipment grounding monitoring and controlling system that the utility model embodiment provides, including underground are electrically set
Standby earthing pole and the grounding monitor supervising device inside or outside the earthing pole, specifically enter with reference to accompanying drawing 2 to Fig. 6
One step explanation.
The utility model embodiment method and device can carry out real time on-line monitoring monitoring to the grounding resistance of earthing pole,
Monitored suitable for the grounding resistance on-line real time monitoring under colliery and other application scenarios, be grounded pole imperfect earth power-off and close
Lock and/or alarm, effectively improve the Earthing Reliability of earthing pole.
Fig. 2 is that the grounding resistance monitoring principle first being arranged in equipment that the utility model embodiment provides is illustrated
Figure, as shown in Fig. 2 the leak(age) test device and grounding monitor supervising device of underground electrical equipment.Wherein, leak(age) test device bag
Include 660V supply voltages, test resistance 1, contact j1, experiment button 3, tubular local auxiliary earth pole 5；Grounding monitor monitoring dress
Put and be serially connected in leak(age) test including measurement power supply 13, current sample module 91, processor 92, communication module 93 and contact J1
The relay of device.
Measure local earthed electrode or the ground connection of the main earthing pole or miscellaneous equipment of the one end of power supply 13 connection earth leakage protective device
Net or measurement of Grounding Resistance earth electrode special 29, the other end connect earthing pole 5 by current sample module 91, make measurement power supply
13rd, current sample module 91 forms current detection circuit with the earthing pole by the earth, that is, measures the electric current that power supply 13 flows out
Successively measurement power supply 13 is flowed back to via current sample module 91, earthing pole 5, the earth, earthing pole 29.
Processor 92 obtains the size of current in current detection circuit using current sample module 91 in real time, and according to electric current
Size, determines the grounding resistance of earthing pole 5, and by communication module 93 by resistance size and actuating of relay state reporting extremely
Monitoring facility 6, such as Jing Shang Surveillance center.
Processor 92 can also determine whether earthing pole 5 is hanging, such as according to size of current and/or the resistance of grounding resistance
Fruit determines that earthing pole 5 is hanging, then generation alarm or power-off signal, and report to monitoring facility 6 by communication module 93.Together
When, processor 92 is disconnected by the contact J1 of control relay, avoid 660V voltages by test resistance 1, contact j1, experiment by
Knob 3 introduces hanging earthing pole 5, eliminates the hidden danger for producing " electric spark ", ensures downhole safety.
The contact j1 of the relay can be normally closed contact or normal opened contact.
Fig. 3 is that the grounding resistance monitoring principle second being arranged in equipment that the utility model embodiment provides is illustrated
Figure, as shown in figure 3, measurement power supply 13 one end ground connection, the other end is connected with relay 11, then is connected with resistance measuring instrument 9, then
It is connected in tubular local earthed electrode 5.Wherein, relay 11 can be the electronics relay using the wired or wireless way of output
Device, resistance measuring instrument 9 can be pointer ohmmeter or use the digital of wired or wireless transmission means measured value
Sheet resistance measurement.Measurement power supply 13, relay 11, resistance measuring instrument 9 collectively constitute grounding monitor supervising device 7, detect electric current
Flowed out by measurement power supply 13, tubular local earthed electrode 5 is flowed into by relay 11 and resistance measuring instrument 9, by greatly flowing back to survey
Measure power supply 13.Resistance measuring instrument 9 determines the grounding resistance size of tubular local earthed electrode 5 according to the size of current flowed through, and
It is shown in gauge outfit, or is sent to by wired forms or wireless on monitoring facility (such as Jing Shang Surveillance center) 6,
When the grounding resistance of earthing pole 5 reaches certain value, such as earthing pole is hanging, when grounding resistance exceedes certain setting, relay
11 actions, its contact J1 releases (disconnect), cut-out 660V power supplys enter the path of test button 3 by test resistance 1, when by
During test button 3, earthing pole 5 separates with 660V power supplys, therefore 660V power supplys will not be guided on hanging earthing pole, ensures
Earthing pole 5 is similarly safe and reliable when vacantly earth-free, will not draw 660V " electric spark " and cause the accident, that is, realize
5 hanging locking of earthing pole, while monitoring facility 6 can obtain the alarm signal hanging on earthing pole.Wherein, monitoring
Facility 6 can be various general monitoring and controlling systems, and measurement power supply 13 can be general intrinsic safety electric source.
The job step of the system is as follows：
Step S101：Grounding monitor supervising device is connected with the earthing pole of underground electrical equipment, makes the grounding monitor
Supervising device forms current detection circuit with the earthing pole by the earth.
The earthing pole can be tubular earthing pole, and the grounding monitor supervising device is arranged on the tubular earthing pole
Hollow part or outside.
The earthing pole can be earth plate, and the grounding monitor supervising device is arranged on the outside of the earth plate.
Step S102：Grounding monitor supervising device flows through the electricity of the earthing pole by monitoring in the current detection circuit
Stream, determine the resistance of the grounding resistance of the earthing pole.
The grounding monitor supervising device includes：For the measurement power supply powered for device, for being examined according to the electric current
The resistance measuring instrument of the Current calculation grounding resistance resistance of the earthing pole is flowed through in survey time road.
Step S103：The monitoring result of resistance comprising the grounding resistance is transferred to by grounding monitor supervising device
Monitoring protection facility on underground or well.
The monitoring result can also include alarm signal or power-off signal.Specifically, the grounding monitor prison
Resistance or the electric current that flows through the earthing pole of the device according to the grounding resistance are controlled, determines whether the earthing pole is reliable
Ground connection, however, it is determined that the non-reliable ground of earthing pole, then generate alarm signal or power-off signal, and be transferred on underground or well and supervise
Control protection facility.For example, grounding monitor supervising device by the resistance of the grounding resistance compared with preset resistance threshold value, and
According to comparative result, determine the earthing pole whether reliable ground, furtherly, if the resistance of grounding resistance is more than default electricity
Threshold value is hindered, then illustrates that earthing pole is hanging or ground connection is bad, now determines that earthing pole ground connection is unreliable, now, grounding monitor monitoring
Device generation alarm or power-off signal, it is transferred to monitoring protection facility on underground or well.In another example grounding monitor supervising device will
Whether the electric current for flowing through earthing pole determines the earthing pole compared with predetermined current threshold, and according to comparative result
Reliable ground, furtherly, if electric current is less than predetermined current threshold, illustrate that earthing pole is hanging or ground connection is bad, now really
It is unreliable to determine earthing pole ground connection, now, grounding monitor supervising device generation alarm or power-off signal, is transferred on underground or well and supervises
Control protection facility.
The grounding monitor supervising device also includes actuating mechanism, and the contact of the actuating mechanism is serially connected in the underground electricity
In the supply line of the leak(age) test device of gas equipment.Grounding monitor supervising device is in generation alarm signal or power-off signal and passes
, can also be by its actuating mechanism while being defeated by monitoring protection facility on underground or well, the leakage to the underground electrical equipment
Electric test device carries out on/off control, and furtherly, if earthing pole is hanging, grounding monitor supervising device is acted by it
Mechanism disconnects the path between the 660V power supplys and earthing pole of the leak(age) test device, specifically, grounding monitor monitoring dress
The actuating mechanism put can be relay, and the contact ji of the relay is serially connected in the supply line of the leak(age) test device
In, by disconnecting the contact, disconnect the supply line of the leak(age) test device.As shown in figure 1, pass through control contact
J1 is disconnected, and the path between 660V power supplys and earthing pole is reliably cut off, so, test button 3 by normal opened contact to try
When testing earth leakage protective Reliability of Microprocessor, the normal opened contact of test resistance 1, contact j1, test button 3 can be avoided passing through by 660V
Voltage is guided on earthing pole 5 and " electric spark " occurs, so as to eliminate the hidden danger that actuation gas coal dust or the person get an electric shock.
The contact j1 of the contact of the operating mechanism, particularly relay can be normally closed contact or normally opened connect
Point.
Above-mentioned measurement power supply, actuating mechanism, resistance measuring instrument are packaged using insulating materials.
To avoid, the electric current of the grounding monitor supervising device flows out detection line and electric current flows into detection line and connect by described
The metal shell short circuit in earth polar, can fix the protection device of prevention short circuit on the earthing pole metal shell or inclined-plane, should
The protection device of prevention short circuit includes middle conductor and is laid in the insulator of middle conductor surrounding, wherein, the middle conductor
The wire that detection line or electric current inflow detection line are flowed out with electric current is connected.Fig. 4 is being arranged on for the utility model embodiment offer
Grounding resistance monitoring principle schematic in tubular earthing pole 5, Fig. 5 be K that the utility model embodiment provides to figure, such as
Shown in Fig. 4 and Fig. 5, grounding monitor supervising device 7 is arranged in the pipe of tubular local auxiliary earth pole 5, grounding monitor monitoring dress
7 electric current is put from detection line a (flowing out detection line equivalent to electric current) 15 outflows, after too greatly, from detection line b (equivalent to electricity
Stream flow into detection line) wire flow back to grounding monitor supervising device 7.When earthing pole 5 is hanging or ground connection is serious bad, it is fixed on
Grounding monitor supervising device 7 in tubular earthing pole flows into the earth by detection line a15, returns detection line b wire 21
Electric current is greatly reduced, the resistance increase of grounding resistance measurement, and the actuating of relay in grounding monitor supervising device 7 is leaked electricity with disconnecting
The supply access of experimental rig, while alarm or power-off signal are exported extremely with wired and wireless mode by output line 17
Monitoring facility.The present embodiment realizes whether real time on-line monitoring monitoring earthing pole is hanging, can alarm or cut off if necessary connecing
The power supply of equipment where earth polar.
Make a K on earthing pole 5 to figure shown device, the device is fixed on the metal shell of earthing pole 5 or earthing pole is oblique
Face 27, surrounding have insulant 19, and middle conductor is connected with detection line b wire 21.The wire of tape insulation can also be drawn, such as
Shown in Fig. 6 K to figure, it is fixed on earthing pole metal shell.The function of insulant 19 shown in Fig. 6 K to figure is to prevent from being grounded
Both ends detection line a, b of monitoring device 7 is ensured when being grounded good, both ends detection by the short circuit of earthing pole metal shell
Line a, b form loop by the earth, breaking when earthing pole is hanging.
Fig. 6 is the grounding resistance monitoring principle schematic for the grounded screen that the utility model embodiment provides, such as Fig. 6 institutes
Show, the measurement power supply 13 of grounding monitor supervising device 7 can be replaced with dry cell, and be sealed with the insulating materials such as epoxy resin are unified
Dress, is installed to the hollow part of tubular earthing pole 5, and the extraction wire 21 of grounding monitor supervising device 7 connects with earthing pole metal shell
Connect, the wire can tape insulation skin 19, in order to avoid short circuit connection.The other end lead-out wire of grounding monitor supervising device 7 is with being apart grounded
Earthing detection earth electrode special 25 remote pole 5m is connected, and output line 17 is connected with monitoring facility, and grounding resistance is surveyed
The signal such as value or actuating of relay value is transferred to monitoring facility by wired or wireless mode, is supervised for real-time online
Survey earthing pole grounding resistance.If earthing pole is connected to grounded screen 26, so that it may the grounding resistance of grounded screen at this is monitored, it is necessary
When, it can alarm, power off, locking (not giving grounding resistance undesirable equipment power supply).Earthing pole 5 can also be ground connection
Plate, grounding monitor supervising device 7 is at this moment arranged on earth plate outside.
In summary, electric leakage of the embodiment of the present utility model due at home and abroad realizing earth leakage protective device first tries
The hanging locking of earthing pole is tested, so when carrying out distance leakage testing in underground or ground, even if nobody checks earthing pole at the scene
It is whether hanging, be also not in the hidden danger that earthing pole vacantly draws electric spark, contribution is made that for downhole safety.
Monitoring intellectuality is at home and abroad realized in the monitoring of grounding resistance on-line real time monitoring first, substantially increases ground connection
Protect security reliability.
Although the utility model is described in detail above, the utility model not limited to this, the art
Technical staff can carry out various modifications according to principle of the present utility model.Therefore, it is all to be made according to the utility model principle
Modification, all should be understood to fall into the scope of protection of the utility model.
Claims (7)
- A kind of 1. underground electrical equipment grounding monitoring and controlling system, it is characterised in that including：The earthing pole of underground electrical equipment；Grounding monitor supervising device, inside or outside the earthing pole；Wherein, the grounding monitor supervising device includes：Power supply is measured, for being powered for device；Resistance measuring instrument, it is connected between the measurement power supply and the earthing pole, makes the measurement power supply, the resistance measurement Instrument, the earthing pole form current detection circuit by the earth, and according to flowing through the earthing pole in the current detection circuit Electric current, determine grounding resistance resistance, the monitoring result of the resistance comprising the grounding resistance be transferred to underground or well Upper monitoring protection facility.
- 2. system according to claim 1, it is characterised in that the grounding monitor supervising device also includes actuating mechanism, The actuating mechanism is connected between the measurement power supply and the resistance measuring instrument, and its contact is connected to the underground and electrically set In the supply line of standby leak(age) test device, the supply line for the leak(age) test device to the underground electrical equipment enters Row on/off controls.
- 3. system according to claim 2, it is characterised in that the measurement power supply, the actuating mechanism, the resistance are surveyed Amount instrument is encapsulated by insulating materials.
- 4. according to the system described in claim 1 or 2 or 3, it is characterised in that also include：The protection device for the prevention short circuit being fixed on the earthing pole metal shell or inclined-plane, for preventing the grounding monitor The electric current outflow detection line and electric current of supervising device flow into metal shell short circuit of the detection line by the earthing pole.
- 5. system according to claim 4, it is characterised in that the protection device of the prevention short circuit includes：Middle conductor, it flows out the wire of detection line or electric current inflow detection line with electric current and is connected；Insulator, it is laid in middle conductor surrounding.
- 6. system according to claim 1, it is characterised in that the earthing pole is tubular earthing pole, the grounding monitor Supervising device is arranged on the hollow part or outside of the tubular earthing pole.
- 7. system according to claim 1, it is characterised in that the earthing pole is earth plate, the grounding monitor monitoring Device is arranged on the outside of the earth plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720106848.1U CN206818822U (en) | 2017-02-04 | 2017-02-04 | A kind of underground electrical equipment grounding monitoring and controlling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720106848.1U CN206818822U (en) | 2017-02-04 | 2017-02-04 | A kind of underground electrical equipment grounding monitoring and controlling system |
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| CN206818822U true CN206818822U (en) | 2017-12-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707087A (en) * | 2017-02-04 | 2017-05-24 | 山西全安新技术开发有限公司 | Grounding monitoring and controlling method and system for underground electric equipment |
-
2017
- 2017-02-04 CN CN201720106848.1U patent/CN206818822U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707087A (en) * | 2017-02-04 | 2017-05-24 | 山西全安新技术开发有限公司 | Grounding monitoring and controlling method and system for underground electric equipment |
| WO2018141259A1 (en) * | 2017-02-04 | 2018-08-09 | 山西全安新技术开发有限公司 | Grounding monitoring system, method and device, and computer-readable storage medium |
| US11061079B2 (en) | 2017-02-04 | 2021-07-13 | Shanxi Quan'an New Technology Development Co., Ltd. | Grounding monitoring system, method, device and computer readable storage medium |
| CN106707087B (en) * | 2017-02-04 | 2024-04-05 | 山西全安新技术开发有限公司 | Underground electrical equipment grounding monitoring method and system |
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