CN106707076A - Shearer earth leakage lockout detection device - Google Patents
Shearer earth leakage lockout detection device Download PDFInfo
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- CN106707076A CN106707076A CN201510779274.XA CN201510779274A CN106707076A CN 106707076 A CN106707076 A CN 106707076A CN 201510779274 A CN201510779274 A CN 201510779274A CN 106707076 A CN106707076 A CN 106707076A
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- coal
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- detection
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- winning machine
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Abstract
The invention discloses a shearer earth leakage lockout detection device. The device adopts two high-voltage isolation relays, the voltage-withstanding stage of the detection device and a power circuit can be enhanced further, the voltage current of the power circuit can be detected before an earth leakage detection channel is built, the power supply state of the power circuit is judged, earth leakage detection can be ensured to be carried out when the power circuit is in a no power supply state, and the reliability of the earth leakage lockout detection device is improved. After the device is applied to the shearer, through field test, the earth leakage lockout actions are reliable, and effective detection and protection can be provided for the insulation state of the power circuit of the shearer.
Description
Technical field
The present invention relates to a kind of coal-winning machine electric leakage locking detection device, it is adaptable to field of mining.
Background technology
Domestic high-power high working face coal winning machine, its power loop is all multiloop, independent start-stop control system, and earth leakage protective form uses earth leakage search/lockout mode.The electric leakage locking detection device of power loop; due to the factor such as detection means frequent switching in power loop voltage class (being powered using 3300V voltage class more than the high-power coal cutter power loop of general 1000 more than kW) high, multi-loop transmission electric process; fault rate is high and failure can induce one detection means the high pressure of power loop often; cause failure damaged condition further to increase, or even influence whether the electric-control system of coal-winning machine.
The content of the invention
The present invention proposes a kind of coal-winning machine electric leakage locking detection device, the device is using double high_voltage isolation relays, further increase the stress levels of detection means and power loop, and the voltage x current to power loop before detection of electrical leakage Path Setup is detected, judge the power supply state of power loop, ensure that power loop carries out detection of electrical leakage in the state of without power supply, improve the reliability of electric leakage locking detection device.The device can provide effective detection and protection through on-the-spot test, earth leakage search/lockout reliable in action after being applied to coal-winning machine for the insulation status of coal-winning machine power loop.
The technical solution adopted in the present invention is：
The method of the earth leakage search/lockout detection uses additional dc power supply detection method, and measure loop is：From wherein a phase, motor that additional dc power supply positive pole passes through two groups of high_voltage isolation relays of KA, KB to cut power loop, then through the earth to device sampling circuit, power cathode is eventually passed back to.During normal work：After detection means receives the enabling signal of cut power loop, KA, KB normally closed, leak channel is set up and starts detection, when detecting loop and leaking electricity, apparatus control system sends power-on mechanism of the electric leakage signal to coal-winning machine master control system master control system locking cut power loops, forbids upper electricity to be concurrently out of order alarm signal：When not detecting electric leakage, the detection of apparatus control system disconnection detection channel end earth leakage search/lockout, and testing result is sent to coal-winning machine master control system, it is electricity on cut power loop that master control system drives and performs structure.
The electric-control system all has carries out the function of real-time monitoring to the voltage and current of each power loop, and gives missing inspection device by signal real-time Transmission.Missing inspection device can be avoided because starting-up later time failure or leakage detecting circuit failure are so that power loop is under power supply state before earth leakage search/lockout detection to the judgement of power loop voltage and current signal, electrical leakage locking device puts into detection of electrical leakage, detection of electrical leakage channel errors are connected, high pressure is directly introduced into measure loop, fault degree is further expanded.Meanwhile, high-voltage relay KA, KB's is used in series.A kind of redundancy interlocking structure can be formed, and power loop can be strengthened and more efficiently prevented from due to the high-voltage breakdown measure loop expansion fault coverage that power loop failure is produced with the stress levels that isolates of measure loop.The electric leakage locking detection device by changing earth leakage search/lockout working value, in can be applied to the coal-winning machine power loop of 3300 V or 1140V voltage class.
The master control system of the electric leakage locking detection device is the control system with STM32F107 microprocessors as core.Master control system hardware circuit design is mainly including electric power loop, signal isolation loop, On-off signal output loop, A/D sample circuits, CAN communication interface circuit etc..STM32F107 is the 32-bit microprocessor with Cortex-M3 as kernel; its maximum operating frequency can reach 72MHz; internal high-speed memories on piece; with 10 abundant ports and peripheral hardware resource; 12 A/D converters on piece; the design requirement of electric leakage sampling can well be met, it is ensured that the reliability of protection act.
The software system design of described device is divided into main program and the part of subprogram 2, and according to real work needs, software has been divided into multiple functional modules.In main program; after inquiring the enabling signal of major loop; the voltage and current signal that is detected in power loop by the interrupt module of timer 1 is under conditions of zero simultaneously; detection means starts earth leakage detection functions; carry out A/D sampled-data processings and according to result control protection executing agency, result can in real time by CAN interface communication transfer to coal-winning machine master control system.Data processing, when power loop insulation values over the ground are less than 5MQ, Insulation monitoring value can be transferred to coal-winning machine master control system by earth detector, can be shown as early warning in coal-winning machine monitoring and controlling system.Bad environments in view of coal mine work area are changeable, and performance certain change to electrical equipment can occur during use, therefore device adds people's self-correcting function in the design process.When detection means in use for some time, the earth leakage search/lockout detection action caused due to operating mode factor is inaccurate, can manually operate introducing self-correcting positive signal, compensation is modified to testing result, with the accuracy for ensureing to detect.
The beneficial effects of the invention are as follows：The device is using double high_voltage isolation relays, further increase the stress levels of detection means and power loop, and the voltage x current to power loop before detection of electrical leakage Path Setup is detected, judge the power supply state of power loop, ensure that power loop carries out detection of electrical leakage in the state of without power supply, improve the reliability of electric leakage locking detection device.The device can provide effective detection and protection through on-the-spot test, earth leakage search/lockout reliable in action after being applied to coal-winning machine for the insulation status of coal-winning machine power loop.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is detection of electrical leakage schematic diagram of the invention.
Fig. 2 is master control system theory diagram of the invention.
Fig. 3 is software flow block diagram of the invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Such as Fig. 1, before KA is to allow detection of electrical leakage high-voltage relay detection of electrical leakage Path Setups, voltage, current signal to power loop judge, when to detect voltage in loop, current signal be zero, show that the power loop is not operated.KA is closed, it is allowed to carry out earth leakage search/lockout detection：Otherwise .KA will not be closed, power loop is forbidden to carry out earth leakage search/lockout detection.KB is detection of electrical leakage high-voltage relay, is closed on the premise of KA is allowed.Set up the detection of detection of electrical leakage channel start.The method of earth leakage search/lockout detection uses additional dc power supply detection method, and measure loop is：From wherein a phase, motor that additional dc power supply positive pole passes through two groups of high_voltage isolation relays of KA, KB to cut power loop, then through the earth to device sampling circuit, power cathode is eventually passed back to.During normal work：After detection means receives the enabling signal of cut power loop, KA, KB normally closed, leak channel is set up and starts detection, when detecting loop and leaking electricity, apparatus control system sends power-on mechanism of the electric leakage signal to coal-winning machine master control system master control system locking cut power loops, forbids upper electricity to be concurrently out of order alarm signal：When not detecting electric leakage, the detection of apparatus control system disconnection detection channel end earth leakage search/lockout, and testing result is sent to coal-winning machine master control system, it is electricity on cut power loop that master control system drives and performs structure.
Electric-control system all has carries out the function of real-time monitoring to the voltage and current of each power loop, and gives missing inspection device by signal real-time Transmission.Missing inspection device can be avoided because starting-up later time failure or leakage detecting circuit failure are so that power loop is under power supply state before earth leakage search/lockout detection to the judgement of power loop voltage and current signal, electrical leakage locking device puts into detection of electrical leakage, detection of electrical leakage channel errors are connected, high pressure is directly introduced into measure loop, fault degree is further expanded.Simultaneously.High-voltage relay KA, KB's is used in series.A kind of redundancy interlocking structure can be formed, and power loop can be strengthened and more efficiently prevented from due to the high-voltage breakdown measure loop expansion fault coverage that power loop failure is produced with the stress levels that isolates of measure loop.The electric leakage locking detection device by changing earth leakage search/lockout working value, in can be applied to the coal-winning machine power loop of 3300 V or 1140V voltage class.
Such as Fig. 2, the master control system of electric leakage locking detection device is the control system with STM32F107 microprocessors as core.Master control system hardware circuit design is mainly including electric power loop, signal isolation loop, On-off signal output loop, A/D sample circuits, CAN communication interface circuit etc..STM32F107 is the 32-bit microprocessor with Cortex-M3 as kernel; its maximum operating frequency can reach 72MHz; internal high-speed memories on piece; with 10 abundant ports and peripheral hardware resource; 12 A/D converters on piece; the design requirement of electric leakage sampling can well be met, it is ensured that the reliability of protection act.
As Fig. 3, the software system design of device are divided into main program and the part of subprogram 2, software flow is as shown in Figure 3.According to real work needs, software has been divided into multiple functional modules.In main program; after inquiring the enabling signal of major loop; the voltage and current signal that is detected in power loop by the interrupt module of timer 1 is under conditions of zero simultaneously; detection means starts earth leakage detection functions; carry out A/D sampled-data processings and according to result control protection executing agency, result can in real time by CAN interface communication transfer to coal-winning machine master control system.Data processing, when power loop insulation values over the ground are less than 5MQ, Insulation monitoring value can be transferred to coal-winning machine master control system by earth detector, can be shown as early warning in coal-winning machine monitoring and controlling system.Bad environments in view of coal mine work area are changeable, and performance certain change to electrical equipment can occur during use, therefore device adds people's self-correcting function in the design process.When detection means in use for some time, the earth leakage search/lockout detection action caused due to operating mode factor is inaccurate, can manually operate introducing self-correcting positive signal, compensation is modified to testing result, with the accuracy for ensureing to detect.
Claims (6)
1. a kind of coal-winning machine electric leakage locking detection device, it is characterized in that：The method of the earth leakage search/lockout detection uses additional dc power supply detection method, from wherein a phase, motor that additional dc power supply positive pole passes through two groups of high_voltage isolation relays of KA, KB to cut power loop, then through the earth to device sampling circuit, power cathode is eventually passed back to.
2. a kind of coal-winning machine electric leakage locking detection device according to claim 1, it is characterized in that the electric-control system all has carries out the function of real-time monitoring to the voltage and current of each power loop, and gives missing inspection device by signal real-time Transmission.
3. a kind of coal-winning machine electric leakage locking detection device according to claim 1, it is characterized in that：The master control system of the electric leakage locking detection device is the control system with STM32F107 microprocessors as core.
4. a kind of coal-winning machine electric leakage locking detection device according to claim 1, it is characterized in that：The master control system hardware circuit design is mainly including electric power loop, signal isolation loop, On-off signal output loop, A/D sample circuits, CAN communication interface circuit etc..
5. a kind of coal-winning machine electric leakage locking detection device according to claim 1, it is characterized in that：The software system design of described device is divided into main program and the part of subprogram 2, and according to real work needs, software has been divided into multiple functional modules.
6. a kind of coal-winning machine electric leakage locking detection device according to claim 1, it is characterized in that：Bad environments in view of coal mine work area are changeable, performance certain change to electrical equipment can occur during use, therefore device adds people's self-correcting function in the design process, when detection means in use for some time, because the earth leakage search/lockout detection action that operating mode factor is caused is inaccurate, introducing self-correcting positive signal can be manually operated, compensation is modified to testing result, to ensure the accuracy of detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510779274.XA CN106707076A (en) | 2015-11-14 | 2015-11-14 | Shearer earth leakage lockout detection device |
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| CN201510779274.XA CN106707076A (en) | 2015-11-14 | 2015-11-14 | Shearer earth leakage lockout detection device |
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| CN106707076A true CN106707076A (en) | 2017-05-24 |
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| CN201510779274.XA Pending CN106707076A (en) | 2015-11-14 | 2015-11-14 | Shearer earth leakage lockout detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441603A (en) * | 2019-08-13 | 2019-11-12 | 西安西驰电气股份有限公司 | A kind of earth leakage search/lockout sample circuit and detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441603A (en) * | 2019-08-13 | 2019-11-12 | 西安西驰电气股份有限公司 | A kind of earth leakage search/lockout sample circuit and detection method |
| CN110441603B (en) * | 2019-08-13 | 2021-07-20 | 西安西驰电气股份有限公司 | Electric leakage blocking sampling circuit and detection method |
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Application publication date: 20170524 |