CN201251615Y - Monitoring alarming device for grounding cable - Google Patents
Monitoring alarming device for grounding cable Download PDFInfo
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- CN201251615Y CN201251615Y CNU2008200600369U CN200820060036U CN201251615Y CN 201251615 Y CN201251615 Y CN 201251615Y CN U2008200600369 U CNU2008200600369 U CN U2008200600369U CN 200820060036 U CN200820060036 U CN 200820060036U CN 201251615 Y CN201251615 Y CN 201251615Y
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Abstract
The utility model discloses a monitoring alarming device for grounding cable, which is adapted for monitoring and alarming when grounding wires of an electric power ground net are stolen. The monitoring alarming device mainly comprises a cable breakage detecting unit, a detection signal processing unit and an alarming unit, wherein the cable breakage detecting unit disposed at the detected grounding cable is a conductor attached to the detected grounding cable, an output end of the cable breakage detecting unit is connected to an input end of the detection signal processing unit, an output end of the detection signal processing unit is connected to an input end of the alarming unit, and the alarming unit outputs alarming signals. The monitoring alarming device can be applied to operational grounding net for electrical, metallurgical, electrochemical and other enterprises for power supply, and can be widely popularized and applied to protecting grounding systems, such as grounding nets, lighting-protection grounding nets and the like.
Description
Technical field
The utility model relates to the holding circuit device, refers in particular to a kind of earthing cable monitoring alarm, and this device is applicable to the monitoring, alarming that the ground wire of electric power grounding grid is cut.
Background technology
Produce the life safety that leakage current threatens operating personnel in the electrical equipment sometimes, the effect of ground wire is to utilize ground wire that leakage current is discharged into the earth, plays and guarantees equipment, personal safety protection measure.The type of ground connection has earthing mode inequality with the different circuit of effect, and earthing mode common in the electron electric power equipment mainly contains: prevent stored charge on the casing, produce static discharge and jeopardize equipment and personal safety.When making casing charged, impel the protection action of power supply and cut off the electricity supply, so that protection staff's safety when the insulation damages of equipment.Can the huge electric field of shielding device, play a protective role.The safety ground that the shell of high-tension apparatus is connected with the earth; For preventing thunderbolt, (for example roof, chimney top) is provided with lightning rod and links to each other with the earth generally aloft, jeopardizes the lightning protection of equipment and personal security when anti-lightning strike; A reference potential that provides for the circuit operate as normal, when this reference potential is connected with the earth, reference potential is considered as the zero potential of the earth, and can not change along with the variation of external electromagnetic field, thereby effective control circuit produces the working earthing of various interference at work.Because reliable and stable ground connection is most important to guaranteeing the equipment personal safety, generally adopt in the system mode of forming grounded screen by some earth points and earthing cable to guarantee reliable ground electrical ground at electric system, metallurgy, the contour power consumption industry of galvanochemistry and building lightning protection.
The earthing cable that is distributed on the grounded screen may perhaps cause fracture because of accident is subjected to the external force infringement because of being subjected to the damage of weather or geologic hazard; Owing to do not have electric current and voltage substantially on system's normal operating conditions earthing cable, the earthing cable on the place cable channels such as the cable duct that is laid in is easy to suffer lawless person's robber to cut.Because impaired or suffer to steal the process of cutting and lack effective monitoring alarm to ground wire at present, the Operation Administration and Maintenance personnel can not find in time that usually earthing cable damages, and can not in time find and prevent the incident of stealing cutover ground cable.Stealing cutover ground cable phenomenon not only makes the national collective interests suffer a loss, what is more important is because the damaged or stolen of earthing cable can not be found in time that electric system operation under disappearance earthing cable state brings great hidden danger also can for power equipment and personal safety.
Utility model patent ZL200620021461.8 discloses a kind of safety monitoring sample circuit that possesses the security appliance protective device of ground wire disconnection monitoring warning function; its principle of work is the detection junctional potential that detects in the sample circuit that is connected between power supply and the ground wire; when the ground wire disconnection fault takes place when; there is not electric current to pass through in the sample circuit; detect contact and become 0 current potential; cause the monitoring alarm action, thereby realize electrical appliance ground wire disconnection monitoring warning function.But, for widely used systems that forms grounded screen by some earth points and earthing cable of industrial electricity supplying and using system such as electric system, metallurgy, galvanochemistry, one or more earthing cable under system's normal operating condition in the grounded screen is damaged or is cut and can't change the current potential of ground wire, this safety monitoring sample circuit that causes ZL200620021461.8 to provide can't detect potential change, and therefore also just can not or be cut for the damage of the earthing cable in the grounded screen provides effective monitoring, alarming function.The existing various break-make that is used for the principle decision circuitry that the power circuit anti-theft alarming equipment detects according to voltage or current signal usually, these determination methods are also powerless usually for normal condition not only no-voltage but also currentless earthed system.
The utility model content
The purpose of this utility model will design a kind of earthing cable monitoring alarm exactly; the emergency protective circuit device of monitoring grounding system state in real time; earthing cable to grounded screen provides real-time monitoring; the technical matters that solves the earthing cable damage or can not in time find when being cut guarantees that the Operation of Electric Systems managerial personnel can find the damage of ground wire or stolen in the very first time.
The utility model is finished above-mentioned purpose, and the technical scheme that is adopted is:
A kind of earthing cable monitoring alarm, comprise the cable breakage detecting unit, detection signal processing unit and alarm unit, the cable breakage detecting unit is arranged on monitored earthing cable place, its output terminal is connected to the input end of detection signal processing unit, the output terminal of detection signal processing unit is connected to the input end of alarm unit, the alarm unit output alarm signal.
Described cable breakage detecting unit is one to adhere to the conductor of setting side by side along monitored earthing cable.
Described conductor is the lead that is arranged side by side with detected cable, or coats conductive metal foil or graphite coating on the cable.
Described conductor is the loop that constitutes attached to the series connection of the electric conductor on the tested cable more than two sections or two sections respectively, to realize the monitoring, alarming function to multistage earthing cable state.
Described detection signal processing unit is made up of triode trigger control circuit, transwitch and alarm region indicating circuit, and the output terminal of triode trigger control circuit is received the control end of transwitch, and controllable silicon is connected in series mutually with the alarm region indicating circuit.
Described alarm unit comprises multivibrator and warning circuit, and multivibrator drives warning circuit and sends alerting signal.
Also comprise and be and be connected with several cable breakage detecting units, several detection signal processing units and the disjunction gate logical circuit of putting, several cable breakage detecting units are exported respectively, and correspondence is connected to described several detection signal processing unit input ends, several detection signal processing unit output terminals are received the input end of disjunction gate logical circuit jointly, or door " output terminal of logical circuit is connected to the input end of described alarm unit, can provide the monitoring, alarming function to the earthing cable that is distributed in a plurality of zones of grounded screen like this.
The beneficial effects of the utility model are: the earthing cable monitoring alarm that utilizes the utility model to provide, can realize the earthing cable of electric system grounded screen is realized monitoring in real time, the Operation Administration and Maintenance personnel can find in time that earthing cable damages, avoid causing the electric system potential safety hazard that operation brings for the equipment person under disappearance earthing cable state because of the earthing cable fault, can also in time find and prevent the robber of earthing cable to cut incident, avoid the loss of state and collective's property.The subregion monitoring, alarming function that the utility model earthing cable monitoring alarm provides can also help the Operation Administration and Maintenance personnel to locate the position of the earthing cable fault or the incident that is cut fast and effectively, improve the work efficiency of accident treatment, can avoid the expansion of accident.The utility model earthing cable monitoring alarm can be at electric system, metallurgy, galvanochemistry and other kinds working earthing net and protective ground net for electricity consumption enterprise, and the earthed systems such as lightning protection grounding network of important building are applied widely.
Description of drawings
Fig. 1 is the square frame principle synoptic diagram of the utility model warning device.
Fig. 2 a, Fig. 2 b, Fig. 2 c, Fig. 2 d, Fig. 2 e are respectively the cable breakage detecting unit of the utility model warning device and five kinds of structural representations between earthing cable.
Fig. 3 is the square frame principle synoptic diagram that the utility model warning device is multi-path monitoring.
Fig. 4 is the circuit theory synoptic diagram that the utility model warning device is multi-path monitoring.
Fig. 5 is that input, the output signal of the utility model warning device concerns synoptic diagram.
Embodiment
In order to understand technique scheme of the present utility model better, describe in detail further below in conjunction with drawings and Examples.
First embodiment of the utility model earthing cable monitoring alarm as shown in Figure 1, comprise cable breakage detecting unit 1, detection signal processing unit 2 and alarm unit 3, cable breakage detecting unit 1 is connected to the input end of detection signal processing unit 2, the output terminal of detection signal processing unit 2 is connected to the input end of alarm unit 3, alarm unit 3 output alarm signals.Cable breakage detecting unit 1 is to be made of an electric conductor that adheres to along monitored earthing cable 10.
Fig. 2 is the cable breakage detecting unit 1 and earthing cable structural representation of the utility model earthing cable monitoring alarm, in order to express clearly, in Fig. 2, represent monitored earthing cable 10 with heavy line, with representing attached to the electric conductor that constitutes cable breakage detecting unit 1 on this earthing cable with the parallel fine line of this heavy line, each represents between the two attachment relationship to the oval little ring at thickness solid line two ends.Be wired to connector 121 attached to the electric conductor two ends on the monitoring grounding cable 10, constitute the cable breakage detecting unit 1 of the utility model earthing cable monitoring alarm.The electric conductor that constitutes cable breakage detecting unit 1 can be the special thin wire as signal wire that has in the earthing cable of signal wire, also can be the thin wire that lays and band together with this earthing cable along common earthing cable.Because cable breakage detecting unit 1 does not have electric current to pass through in working order basically, the operating voltage of bearing is also very low, can also use outside common earthing cable the conductive metal foil that coats or the graphite coating electric conductor as cable breakage detecting unit 1 in specific embodiment.
In the grounded screen of reality, may comprise a plurality of areas to be monitored, can lay one or more snippets earthing cable in the same area to be monitored.A kind of embodiment preferably of the utility model earthing cable monitoring alarm is being the electric conductor loop attached to the series connection of the electric conductor on the monitored earthing cable more than two sections or two sections respectively, constitute a cable breakage detecting unit 1, be connected to the detection input end of detection signal processing unit 2, realize monitoring, alarming function multistage earthing cable state.As embodiment of the present utility model, present embodiment grounded screen shown in Figure 2 has comprised five areas to be monitored, area to be monitored 101 comprises one section monitored earthing cable 10, be wired to connector 121 attached to the electric conductor on this section earthing cable, constitute cable breakage detecting unit 1, be connected to the detection signal processing unit 2 corresponding with it; Area to be monitored 102 comprises two sections monitored earthing cables 10, be the electric conductor loop attached to two sections electric conductors on these the two sections monitored earthing cables 10 by the lead series connection respectively, constitute cable breakage detecting unit 1, be connected to corresponding detection signal processing unit 2 by connector 122; Area to be monitored 103 comprises three sections monitored earthing cables 10, be the electric conductor loop attached to three sections electric conductors on these the three sections monitored earthing cables 10 by the lead series connection respectively, constitute cable breakage detecting unit 1, be connected to corresponding detection signal processing unit 2 by connector 123; Equally, the electric conductor that adheres on area to be monitored 104 and 105 three sections and the two sections monitored earthing cables 10 is the electric conductor loop by the lead series connection respectively, the cable breakage detecting unit 1 of forming corresponding monitored earthing cable 10 is connected to corresponding detection signal processing unit 2 by connector 124 and 125 respectively.
A kind of embodiment of multi-path monitoring preferably of the utility model earthing cable monitoring alarm as shown in Figure 3, two groups or more cable breakage detecting unit 1 and detection signal processing unit 2 are connected to the input end of described alarm unit 3 by the output terminal of disjunction gate logical circuit 4, can provide the monitoring, alarming function to the earthing cable that is distributed in a plurality of zones of grounded screen like this.The disjunction gate logical circuit 4 of the utility model earthing cable monitoring alarm can adopt diode and the discrete component disjunction gate logical circuit that switch triode is formed that comprises more than two or two, also can adopt the integrated circuit disjunction gate logical circuit that possesses said function.
As another embodiment of the present utility model, Fig. 4 discloses an earthing cable monitoring alarm that 5 road earthing cable monitoring, alarming functions can be provided, and can be used for the grounded screen that comprises 5 areas to be monitored shown in Figure 2.In the present embodiment, grounded screen shown in Figure 2 comprise 5 road cable breakage detecting units 1, be connected to the input end of 5 road detection signal processing units 2 respectively by connector 121～125 (see figure 4)s.
The embodiment of Fig. 4 comprises 5 tunnel identical detection signal processing units 2, detection signal processing unit 2 is to comprise the triode trigger control circuit, the discrete component detection signal processing unit that transwitch and light emitting diode alarm region indicating circuit are formed, by triode VT1, transwitch VS1, resistance R 1, R2, R3, capacitor C 1 and LED 1 are formed.5 road cable breakage detecting units 1 are connected respectively to the input end of 5 road detection signal processing units 2, the LED 1 of each detection signal processing unit 2 output terminal, monitor the state of the earthing cable in 5 zones respectively, realize subregion monitoring, alarming deixis.The output terminal of detection signal processing unit 2 is connected to disjunction gate logical circuit 4.
Disjunction gate logical circuit 4 in the present embodiment is disjunction gate logical circuits of 5 tunnel inputs, is made up of 5 diode D1～D5 and triode VT4, and its output terminal is connected to alarm unit 3.
Fig. 5 is the input/output signal graph of a relation of present embodiment, and the Ui1-5 among Fig. 5 is the input signal of the input end of detection signal processing unit 2, and UL+ is the output signal of disjunction gate logical circuit 4, and Uo is the output signal of alarm unit 3 multi resonant oscillator circuit.
Under normal condition, 5 road cable breakage detecting units 1 of monitored earthing cable 10 all are the short circuit electric conductors that connects into loop, be connected to the input end of 5 road detection signal processing units 2 by connector 121～125, the input signal Ui1-5 of detection signal processing unit 2 is 0 current potential.When arbitrary section among the monitored earthing cable 10 quilt accident damaged or suffered that the robber cuts, cable breakage detecting unit 1 opened circuit, and becomes high level with the signal Ui1-5 of corresponding detection signals processing unit 2 input ends that are connected in the connector 121～125.Input end becomes high level one of in the detection signal processing unit 2, and detection signal processing unit 2 output high level are lighted corresponding LED 1 simultaneously, and alarm condition takes place in the expression corresponding region.One of input end diode D1～D5 of the disjunction gate logical circuit 4 that is connected with detection signal processing unit 2 output terminals becomes high level, and the output level UL+ of disjunction gate logical circuit 4 becomes high level.That is to say that no matter among five groups of monitored earthing cables 10 among the 101-105 of area to be monitored arbitrary section be by unexpected damage or suffer to steal and cut, disjunction gate logical circuit 4 output UL+ can become and are high level.When disjunction gate logical circuit 4 output UL+ are high level, trigger the work of multi resonant oscillator at once, multi resonant oscillator circuit output signal Uo is the high and low level of periodicity, and the light-emitting diode flash pilot lamp LED3 that drives alarm unit 3 sends flicker warning light, and loudspeaker Y is sent alarm sound.
The embodiment of the utility model earthing cable monitoring alarm provides low-voltage DC supply by power circuit 5.Power circuit 5 is the simple and easy D.C. regulated power supplies that comprise isolating transformer, bridge rectifier and voltage stabilizing diode.Power circuit 5 provides low-voltage DC supply by power connection points 51 for detection signal processing unit 2, disjunction gate logical circuit 4 and alarm unit 3.Irrigate the electrical network of the electricity consumption enterprise of electrical network or seasonal work for the rural power of intermittent power supply or often power failure; can use dry cell or accumulator to provide low-voltage dc power supply as the utility model earthing cable monitoring alarm by power connection points 51; thereby guarantee to continue to provide monitoring, alarming, prevent that the lawless person from utilizing power off time to implement to steal the criminal activity of cutover ground cable protected ground networks in outage.
At last, need to prove,
The detection signal processing unit of the utility model earthing cable monitoring alarm and alarm unit can adopt integrated circuit detection signal processing unit or other circuit form.
Light-emitting diode flash pilot lamp and hummer, loudspeaker or alarm bell that the multivibrator that alarm unit can adopt discrete component to form drives are formed acoustic-optic alarm, also can adopt common sound and light alarm integrated circuit to form acousto-optic warning unit.
The output signal of the detection signal processing unit of the utility model earthing cable monitoring alarm and disjunction gate logical circuit is connected to the input end of wired or wireless alarm signal transmitter, utilize wired or wireless alarm signal transmitter as alarm unit, can also constitute the cable monitoring warning device that possesses the long-distance alarm function.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of the above embodiment.
Claims (7)
1, a kind of earthing cable monitoring alarm, it is characterized in that: comprise the cable breakage detecting unit, detection signal processing unit and alarm unit, the cable breakage detecting unit is arranged on monitored earthing cable place, its output terminal is connected to the input end of detection signal processing unit, the output terminal of detection signal processing unit is connected to the input end of alarm unit, the alarm unit output alarm signal.
2, earthing cable monitoring alarm according to claim 1 is characterized in that: described cable breakage detecting unit is one to adhere to the conductor of setting side by side along monitored earthing cable.
3, earthing cable monitoring alarm according to claim 2 is characterized in that: described conductor is the lead that is arranged side by side with detected cable, or coats conductive metal foil or graphite coating on the cable.
4, according to claim 2 or 3 described earthing cable monitoring alarms, it is characterized in that:
Described conductor is the loop that constitutes attached to the series connection of the electric conductor on the tested cable more than two sections or two sections respectively.
5, earthing cable monitoring alarm according to claim 1, it is characterized in that: described detection signal processing unit is made up of triode trigger control circuit, transwitch and alarm region indicating circuit, the output terminal of triode trigger control circuit is received the control end of transwitch, and controllable silicon is connected in series mutually with the alarm region indicating circuit.
6, earthing cable monitoring alarm according to claim 1, it is characterized in that: described alarm unit comprises multivibrator and warning circuit, multivibrator drives warning circuit and sends alerting signal.
7, earthing cable monitoring alarm according to claim 1, it is characterized in that: also comprise being and being connected with several cable breakage detecting units, several detection signal processing units and the disjunction gate logical circuit of putting, several cable breakage detecting units are exported respectively, and correspondence is connected to described several detection signal processing unit input ends, several detection signal processing unit output terminals are received the input end of disjunction gate logical circuit jointly, or door " output terminal of logical circuit is connected to the input end of described alarm unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200600369U CN201251615Y (en) | 2008-06-20 | 2008-06-20 | Monitoring alarming device for grounding cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200600369U CN201251615Y (en) | 2008-06-20 | 2008-06-20 | Monitoring alarming device for grounding cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201251615Y true CN201251615Y (en) | 2009-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200600369U Expired - Fee Related CN201251615Y (en) | 2008-06-20 | 2008-06-20 | Monitoring alarming device for grounding cable |
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| CN (1) | CN201251615Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771803A (en) * | 2016-12-06 | 2017-05-31 | 庄爱芹 | A kind of outdoor power system connector and its control method |
| CN107985111A (en) * | 2017-12-28 | 2018-05-04 | 山西得尔新能源汽车有限公司 | A kind of intelligent DC charging pile |
| CN109932620A (en) * | 2019-04-20 | 2019-06-25 | 开滦（集团）有限责任公司电信分公司 | Fixed-line telephone and network communication cable broken string remote auto warning positioning system |
-
2008
- 2008-06-20 CN CNU2008200600369U patent/CN201251615Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771803A (en) * | 2016-12-06 | 2017-05-31 | 庄爱芹 | A kind of outdoor power system connector and its control method |
| CN107985111A (en) * | 2017-12-28 | 2018-05-04 | 山西得尔新能源汽车有限公司 | A kind of intelligent DC charging pile |
| CN109932620A (en) * | 2019-04-20 | 2019-06-25 | 开滦（集团）有限责任公司电信分公司 | Fixed-line telephone and network communication cable broken string remote auto warning positioning system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090603 Termination date: 20160620 |
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| CF01 | Termination of patent right due to non-payment of annual fee |