CN201444147U - Belt conveyer metal detector - Google Patents
Belt conveyer metal detector Download PDFInfo
- Publication number
- CN201444147U CN201444147U CN2009200161972U CN200920016197U CN201444147U CN 201444147 U CN201444147 U CN 201444147U CN 2009200161972 U CN2009200161972 U CN 2009200161972U CN 200920016197 U CN200920016197 U CN 200920016197U CN 201444147 U CN201444147 U CN 201444147U
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- metal detector
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- belt conveyor
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Abstract
A belt conveyer metal detector used in the industries of coal, metallurgy, electric power, mine and the like comprises a sensor, an oscillator, a high discharge circuit, a detection circuit, a low discharge circuit and an executor, and further comprises two sensors L1 and L2, wherein L1 is sleeved on a belt, and L2 is placed on the lower side of a conveyer belt. L1 signals enter a positive and negative phase detection circuit formed by a diode D21 and a diode D22 after passing through an amplified channel, detected signals are divided into two paths, and respectively enter an amplifier IC8 and an amplifier IC9, IC8 outputs signals to an amplifier IC10 for driving the actuator to work, the IC9 outputs signals for controlling the grid of a field effect pipe V9, V9 and a resistance R30 output signals after diving voltage, thereby controlling input voltage of the amplifier IC10. L2 signals are output to drive the filed effect tube V10 after passing through an amplifying channel, and V10 and the resistance 30 control the input voltage of IC10 after dividing voltage. The belt conveyer metal detector solves the disturbance caused by reinforcing steel wire joints during conveying belts and solves the disturbance caused by the variation of magnetic conductivity when conveying ore materials.
Description
(1) technical field
The utility model relates to a kind of metal detecting device that is applied to industries such as coal, electric power, metallurgical mining, cement, chemical industry, particularly the metal detecting device that in the process of belt conveyor transmission material poisonous metal is detected.
(2) background technology
The metal detecting device that uses on industry band conveyors such as coal, electric power, metallurgical mining, cement, chemical industry all is to adopt vortex induction technique.When the cell winding, the higher-order of oscillation electric current that eddy effect is crossed coil midstream changes at metal, this change formed signal amplification ratio after, can demonstrate the existence of metal.
Sensor in the metal detecting device is exactly a L part in the LC oscillator.Be exactly the telefault of a single turn or multiturn in the enforcement, be made into block form, be enclosed within on the belt conveyor.Oscillator in the machine makes and flows through sinusoidal oscillating current in the telefault.Be entrained in when the metal in the material passes the square frame coil on the belt conveyor, the oscillating current in the coil will induce eddy current in metal.At this moment, metal is equivalent to the secondary coil of transformer.The existence of eddy current changes the electric current in the sensor that is equivalent to primary coil.Because the conductivity of different metals is different with magnetoconductivity, this variation might be to reduce, and also might increase.This reduce or the signal that increases by follow-up amplification, detection, discriminator circuit is handled, and by actuator poisonous metal is removed.
At present, two hang-ups are arranged in sector application, this two hang-up is the puzzlement that metal detecting device faced always.
A difficult problem one: the reinforcing steel wire is arranged in the belt conveyor, and at the wire joint place, amount of metal changes, and causes the metal detector misoperation;
A difficult problem two: when carrying the high ore of magnetoconductivity,, cause the metal detector misoperation because operational throughput changes.
(3) summary of the invention
The purpose of this utility model provides a kind of band conveyor metal detector, can in belt conveyor transmits the process of material, detect poisonous metal, and can accurately differentiate the reinforcing steel wire in the belt conveyor and carry the high ore of magnetoconductivity the time to the influence of detection instrument.
The technical solution adopted in the utility model is: the band conveyor metal detector comprises that sensor L1, oscillator, height are put, detection, low discharging circuit and actuator, the detected electric current changing value of L1 via the amplification channel that height is put, detection, low discharging circuit constitute after input amplifier IC10, IC10 exports to actuator, is finished the work of removing poisonous metal by actuator.The utility model also has a sensor L2, L2 is placed on the belt conveyor downside, have that alone oscillator, height put, detection, low discharging circuit, the L2 signal drives field effect transistor V10 through amplifier IC11 output again behind amplification channel, export control IC10 input voltage size after V10 and resistance R 30 dividing potential drops.
The common metal detection instrument has only a sensor.For detecting the joint of reinforcing steel wire in the belt conveyor, the utility model has been set up a sensor L2 again, this sensor is the coil of the toroidal of 10 centimetres of diameters, in the parallel placement of distance belt conveyor lower surface 5 centimeters, and is placed on the place ahead of sensor L1.When wire joint is surperficial through sensor L2, sensor L2 electric current changes, this change through too highly put, detection, the low formation signal of putting, driving V10 by IC11 causes bypass for master reference L1 channel signal, decay sensitivity is when this moment, wire joint was through sensor L1, because signal is decayed by bypass, actuator just can not produce misoperation, has controlled the interference of wire joint effectively.If there is this moment metal to exist on wire joint, metal signal and wire joint signal are superimposed together and can surpass the thresholding (this thresholding is adjustable) of IC10, make the actuator action.The metal of this moment just can not missed, the solution of this mode success first difficult problem.
The metal of carrying secretly in the belt conveyor is subjected to the induction of electric current in the sensor and produces eddy current, produces two components in the eddy current reflected back cell winding.One is the heating loss's component that is determined by the metallic resistance rate, and this component reduces the oscillating current in the sensor.Another component is the coil inductance energy storage component that the metal magnetic conducting rate is determined, this component increases the oscillating current in the sensor.Iron ore magnetoconductivity height, resistivity is big, and the sensor current variation that is caused by it is to increase.According to this principle, after the utility model detects sensor current by mutual inductor, the component that wherein changes is detected, by diode D21, the D22 of two positive and negative connections, be divided into two passages increasing and reduce to change.Reduce passage and walk D21, after low straightening connects actuate actuators, because the variation that this low metal that is resistivity causes.If the eddy current that ore produces reflection, electric current in the coil increases, at this moment the D22 passage then has output voltage to drive V9, cause bypass for the signal that is sent to actuator, the produced simultaneously signal that reduces of the ore of having decayed, avoided the misoperation that this moment, ore caused, this has just solved second difficult problem.
(4) description of drawings
Accompanying drawing is circuit theory diagrams of the present utility model.
(5) embodiment
The utility model has two sensor L1, L2, and L1 is enclosed within on the belt, and L2 is placed on the belt conveyor downside, and L1 and L2 have that separately oscillator, height put, detection, low discharging circuit.The output terminal of sensor L1 amplification channel constitutes positive negative detecting circuit through diode D21, D22, and detected signal is divided into two-way, and D21 passage (metal reaction passage) is sent into amplifier IC8, and IC8 exports to IC10; D22 passage (ore reaction channel) is sent into amplifier IC9, IC9 output control field effect transistor V9 grid, output control amplifier IC10 input voltage size after V9 and resistance R 30 dividing potential drops.The ore materials that magnetoconductivity is high, the eddy effect that is produced can make sensor current increase, and metal will reduce through out-of-date sensor current.According to this ultimate principle, sensor L1 is enclosed within on the belt conveyor, and by D21, D22 the variation of electric current being divided into increases and reduce two passages.The channel signal of ore reaction drives field effect transistor V9, drives sensitivity adjusting when the ore operational throughput changes, and IC10 does not export, and actuator is failure to actuate.
Sensor L2 is placed on below the belt conveyor, in order to detect the existence of reinforcing wire joint in the belt.When wire joint arrived, the steel wire passage that is connected at sensor L2 formed signal, and this signal drives field effect transistor V10 and regulates sensitivity.This sensitivity adjusting just is failure to actuate through out-of-date actuator to reinforcing wire joint, if above when being loaded with a metal, then IC10 produces output, and actuate actuators.
Claims (3)
1. band conveyor metal detector, comprise sensor L1, oscillator, height is put, detection, low discharging circuit and actuator, L1 is enclosed within on the belt conveyor, the detected electric current changing value of L1 is put via height, detection, input amplifier IC10 behind the amplification channel that low discharging circuit constitutes, the work of IC10 actuate actuators, it is characterized in that: it also has a sensor L2, L2 is placed on the belt conveyor downside, has oscillator alone, height is put, detection, low discharging circuit, the L2 signal drives field effect transistor V10 through amplifier IC11 output again behind amplification channel, export control IC10 input voltage size after V10 and resistance R 30 dividing potential drops.
2. band conveyor metal detector according to claim 1 is characterized in that: sensor L2 is the coil of the toroidal of 10 centimetres of diameters, in the parallel placement of distance belt conveyor lower surface 5 centimeters, and is placed on the place ahead of sensor L1.
3. band conveyor metal detector according to claim 1, it is characterized in that: the output terminal of sensor L1 amplification channel constitutes positive negative detecting circuit through diode D21, D22, and detected signal is divided into two-way, and the D21 passage is sent into amplifier IC8, and IC8 exports to IC10; The D22 passage is sent into amplifier IC9, IC9 output control field effect transistor V9 grid, output control amplifier IC10 input voltage size after V9 and resistance R 30 dividing potential drops.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200161972U CN201444147U (en) | 2009-08-05 | 2009-08-05 | Belt conveyer metal detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200161972U CN201444147U (en) | 2009-08-05 | 2009-08-05 | Belt conveyer metal detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201444147U true CN201444147U (en) | 2010-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200161972U Expired - Fee Related CN201444147U (en) | 2009-08-05 | 2009-08-05 | Belt conveyer metal detector |
Country Status (1)
| Country | Link |
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| CN (1) | CN201444147U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988971A (en) * | 2009-08-05 | 2011-03-23 | 抚顺隆基电磁科技有限公司 | Metal detector for belt conveyer |
| CN102411016A (en) * | 2011-08-12 | 2012-04-11 | 东莞市南星电子有限公司 | Metal resolution algorithm |
| CN108873078A (en) * | 2018-04-24 | 2018-11-23 | 福建金东矿业股份有限公司 | A kind of conveyer metal detector |
| CN111562287A (en) * | 2020-06-28 | 2020-08-21 | 福清市诚冠科技有限公司 | Can detect verifying attachment that plastic alloy panel contains metal volume qualification degree |
-
2009
- 2009-08-05 CN CN2009200161972U patent/CN201444147U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988971A (en) * | 2009-08-05 | 2011-03-23 | 抚顺隆基电磁科技有限公司 | Metal detector for belt conveyer |
| CN102411016A (en) * | 2011-08-12 | 2012-04-11 | 东莞市南星电子有限公司 | Metal resolution algorithm |
| CN102411016B (en) * | 2011-08-12 | 2014-06-04 | 聚能户外用品技术服务(深圳)有限公司 | Metal resolution algorithm |
| CN108873078A (en) * | 2018-04-24 | 2018-11-23 | 福建金东矿业股份有限公司 | A kind of conveyer metal detector |
| CN111562287A (en) * | 2020-06-28 | 2020-08-21 | 福清市诚冠科技有限公司 | Can detect verifying attachment that plastic alloy panel contains metal volume qualification degree |
| CN111562287B (en) * | 2020-06-28 | 2020-11-20 | 福清市诚冠科技有限公司 | Can detect verifying attachment that plastic alloy panel contains metal volume qualification degree |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENYANG LONGI ELECTROMAGNETIC TECHNOLOGY CO., LTD Free format text: FORMER NAME: FUSHUN LONGI MAGNET CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 113122 Liaoning province Fushun SHUNFA Road Economic Development Zone No. 82 Patentee after: Longi Magnet Co., Ltd. Address before: 113122 Liaoning province Fushun SHUNFA Road Economic Development Zone No. 82 Patentee before: Fushun LONGI Magnet Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100428 Termination date: 20130805 |