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CN104030004A - Belt slipping detecting method and device for belt conveyor - Google Patents

Belt slipping detecting method and device for belt conveyor Download PDF

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Publication number
CN104030004A
CN104030004A CN201410269198.3A CN201410269198A CN104030004A CN 104030004 A CN104030004 A CN 104030004A CN 201410269198 A CN201410269198 A CN 201410269198A CN 104030004 A CN104030004 A CN 104030004A
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CN
China
Prior art keywords
belt
relay
time
switch
detector switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201410269198.3A
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Chinese (zh)
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CN104030004B (en
Inventor
赵露露
张伟峰
葛志勇
张云朝
信延才
陈云
孙涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henan Yong Jin Coal Separation Co Ltd
Original Assignee
Henan Yong Jin Coal Separation Co Ltd
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Filing date
Publication date
Application filed by Henan Yong Jin Coal Separation Co Ltd filed Critical Henan Yong Jin Coal Separation Co Ltd
Priority to CN201410269198.3A priority Critical patent/CN104030004B/en
Publication of CN104030004A publication Critical patent/CN104030004A/en
Application granted granted Critical
Publication of CN104030004B publication Critical patent/CN104030004B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention relates to belt slipping detection for belt conveyors and discloses a belt slipping detecting method for a belt conveyor. The method includes the steps of firstly, detecting switches and a retaining block are fixed on the rotary drum and the support of the belt conveyor; secondly, a time period t is set by using each rotation circle of the transmission rotary drum as a cycle; the output signals of two groups of detecting switches are monitored in real time, and if the output signals transmitted by the detecting switches cannot be detected in the time period t, a user can judge that belt slipping occurs. A belt slipping detecting device comprises the detecting switches, intermediate relays, time relays and an alarm. The detecting switches are powered by a switch power supply. One intermediate relay is connected into each group of detecting switch loop. One time relay is connected into each intermediate control loop. The control switches of the time relays are parallelly connected and connected into a delay relay control loop. The control output signals of a delay replay is connected with the alarm or the power-off control loop of the belt conveyor.

Description

A kind of belt of belt conveyor skid method of inspection and belt skidding detecting device thereof
Technical field
The present invention relates to method of inspection and detection control apparatus that a kind of belt of belt conveyor skids.Utilize approach switch to detect the running state of conveyor transmission drum.
Background technology
Band conveyor is widely used in agricultural, chemical industry, electric power, the material transmission in the fields such as coal and mine.In order to prevent that conveyer fault from causing safety misadventure, technical personnel has designed sideslip protection and pull switch device.But conveyer is in operational process, and due to state and the moisture difference of material, the situation that sometimes there will be belt to kill, causes slipping of the belt, does not work.This situation can cause the idle running of head driven by motor head drum, for no reason consumes electric energy.But importantly,, if belt lag switch causes solid accumulation, different in the situation that, may there is different serious consequences.
Prior art personnel have proposed detection and the warning device for slipping of the belt at present, and it detects, and determination methods is different, and product structure is also had nothing in common with each other, but most complex structure, cost is high.In order to carry out better production safety protected working, avoid conveyer fault to enterprise produce make troubles, avoid causing heavy economic losses, person skilled to the research of this respect always constantly explore in.
Summary of the invention
The present invention is directed to prior art deficiency, proposed a kind of simple in structurely, cost is low, and practical slipping of the belt method of inspection and belt skidding detecting device are simple, reliable, easily realize.
The technical solution adopted in the present invention:
A kind of belt of belt conveyor method of inspection that skids, it is realized the detecting step that belt of belt conveyor skids and comprises:
1) on Belt Conveying machine support, be fixedly installed at least two group detector switches, and on the inner edge of driving drum one end of described band conveyor, a block being used in conjunction with described detector switch is set, described detector switch and described block correspondence, be arranged on the outer side frame of driving drum;
2) often circle as one-period taking driving drum, set a time period t that is greater than T period, utilize counting or time set to detect in real time the output switching signal of two groups of detector switches;
3) if can't detect the output switching signal that detector switch sends in described time period t, be judged as slipping of the belt, by slug relay's output alarm or control signal.
The described belt of belt conveyor method of inspection that skids, the mode that adopts two groups of detector switches to be connected in parallel, each shunt circuit connects an intermediate relay, in described each intermediate relay control loop, connect a time relay, complete the output switching signal that detects two groups of detector switches in described time period t, described time relay output contact access warning circuit.
The skid belt skidding detecting device of method of inspection of a kind of described belt of belt conveyor, comprise detector switch, intermediate relay, time relay, annunciator, described detector switch is at least two groups, power by Switching Power Supply, in every group of detector switch loop, connect an intermediate relay, in described each intermediate relay control loop, connect a time relay, the master cock parallel connection of described time relay, access slug relay's control loop, the master cock output signal of described slug relay connects annunciator or Belt Conveying tester in power-down state control loop.
Positive beneficial effect of the present invention:
1, skid method of inspection and device of belt of belt conveyor of the present invention, design science, rationally, simple in structure, easily to realize, cost of investment and operating cost are low.Detector switch is used in pairs, and can effectively prevent from skidding time, baffle plate just in time approaches the appearance (when approach switch is a group) of this phenomenon with approach switch, has improved the accuracy that slipping of the belt detects.
2, belt of belt conveyor slip detector of the present invention, to conceive dexterously, has realized slipping of the belt detection by conventional controller part, and circuit is simple, failure rate is low, and stable and reliable operation, result of use is good.Circuit is simple, and circuit can be configured in switch box, standardized management, and warning device can be selected arbitrarily installation site with environment.
3, skid method of inspection and device of belt of belt conveyor of the present invention, detector switch adopts proximity Hall switch (also can adopt capacitive approach switch or photo-electric approach switch etc.), there is contact pointless, low-power consumption, long life, response frequency high, can be under all kinds of harsies environment reliable operation, failure alarm signal is accurate, and signal disturbs little.
4, the present invention also can be used in conjunction with output signal and PLC, or is used in conjunction with computing machine, and selection can be changeable according to practical application.
Brief description of the drawings
Fig. 1 is belt of belt conveyor slip detector schematic diagram of the present invention.
Fig. 2 is the control drawing of belt of belt conveyor slip detector detector switch of the present invention.
Fig. 3 is the control principle drawing of belt of belt conveyor slip detector of the present invention to belt motor.
Fig. 4 is belt of belt conveyor slip detector scheme of installation of the present invention.
Detailed description of the invention
Below by accompanying drawing and detailed description of the invention, technical scheme of the present invention is described in further detail.
Embodiment 1
A kind of belt of belt conveyor method of inspection that skids, it is realized the detecting step that belt of belt conveyor skids and comprises:
1) on Belt Conveying machine support, be fixedly installed at least two group detector switches, and on the inner edge of driving drum one end of described band conveyor, a block being used in conjunction with described detector switch is set, described detector switch and described block correspondence, be arranged on the outer side frame of driving drum;
2) often circle as one-period taking driving drum, set a time period t that is greater than T period, utilize counting or time set to detect in real time the output switching signal of two groups of detector switches;
3) if can't detect the output switching signal that detector switch sends in described time period t, be judged as slipping of the belt, by slug relay's output alarm or control signal.
Embodiment 2
Belt of belt conveyor described in the present embodiment method of inspection that skids, the mode that adopts two groups of detector switches to be connected in parallel, each shunt circuit connects an intermediate relay, in described each intermediate relay control loop, connect a time relay, complete the output switching signal that detects two groups of detector switches in described time period t, described time relay output contact access warning circuit.
The described belt of belt conveyor method of inspection that skids, detector switch adopts proximity Hall switch, travel switch, infrared sensing switch or capacitance-sensitive switch, has or not by the output switching signal that detects detector switch the running state that reflects driving drum.
The belt of belt conveyor of the present invention method of inspection that skids, utilize conducting time delay and the power cut off delay characteristic of time relay, set a time period t to time relay, in the time of belt normal operation, when time relay also starts to walk, in the time that detector switch and baffle plate approach, time relay power-off once, it is resetted and zero clearing after while continuing to walk, the zero clearing that so repeatedly resets detects while walking; Once there is slipping of the belt phenomenon, detector switch in time period t without on-off signal output, the time relay zero clearing that can not reset, timing time is to time relay coil adhesive, by warning circuit output alarm signal.
The belt of belt conveyor of the present invention method of inspection that skids, in the output control circuit of time relay, the power-off control loop that be provided with band conveyor motor in parallel with warning circuit, the power-off control of skidding in situation to realize band conveyor.
Embodiment 3
Referring to Fig. 1, Fig. 2, Fig. 4.A kind of belt skidding detecting device, comprise detector switch, DC24V intermediate relay, time relay, annunciator, described detector switch is at least two groups, power by Switching Power Supply, in every group of detector switch loop, connect an intermediate relay, in described each intermediate relay control loop, connect a time relay, the master cock parallel connection of described time relay, access one slug relay's control loop, the master cock output signal of described slug relay connects annunciator or Belt Conveying tester in power-down state control loop.The block being used in conjunction with described detector switch is arranged on the inner edge of described band conveyor driving drum one end, described detector switch is fixed in band conveyor frame by erection support, described detector switch and described detection block correspondence, be distributed on the inner edge outer circumference outline line of described driving drum one end.
In figure, L, N:220V source of AC; KF: belt operation intermediate relay; KJ:DC24V intermediate relay; KT: time relay; HA: electric bell; SQ:DC24V approach switch; UR:AC220V~DC24V Switching Power Supply.Coordinate the effect of relay K F to be, in the time of conveyer electrical power, this device is also simultaneously in "on" position.
AC220V~DC24V Switching Power Supply energising, approach switch is in running order, is used for detecting the running state of conveyor transmission drum by being arranged on block on driving drum inner edge.In the time of conveyer generation skidding, driving drum stays cool, and now two groups of approach switchs must have one group to can't detect block, now approach switch is in on-state, and intermediate relay coil electricity, makes time relay conducting, through time delay, electric bell powers alarm.
In Fig. 4, label 1: band conveyor driving drum; 2: the block being used in conjunction with approach switch; 3: belt of belt conveyor; 4: the connection wire of approach switch (each one group of left and right); 5: Belt Conveying machine support; 6: the bearing of fixing approach switch; 7: approach switch (each one group of left and right).
Embodiment 4
Referring to Fig. 1~Fig. 4.Belt skidding detecting device described in the present embodiment, comprise band conveyor power-off control circuit, described band conveyor power-off control circuit comprises control relay, intermediate relay, described control relay drive coil is in parallel with described annunciator, and described control relay control output signal connects the intermediate relay in band conveyor power-off control circuit.The power cut off delay characteristic of utilizing time relay, makes belt conveyer motor power-off, reaches control action.
In Fig. 3, KM is motor control loop intermediate relay.
Belt skidding detecting device of the present invention fixedly mounts baffle plate on belt transmission roller inner edge, on driving drum support, approach switch is installed, and approach switch coordinates distance with the installation of baffle plate be 10~20mm.Time relay in detecting device is fixedly mounted in switch box, and switch box can be fixed on the position of handled easily and observation, by cable, approach switch is connected with time relay.
Described detecting device principle of work is as follows: this detecting device power supply draws from band conveyor motor power, and in the time of electrical power, described detecting device is also switched on and entered detected state.In the time that belt moves, time relay is in time status, in the time of belt normal operation, baffle plate on driving drum can rotate thereupon, every rotation one week, and baffle plate can approach once with two approach switchs are each, approach switch is just connected once, now time relay KT1, KT2 power-off and reset and automatic clear, in such cases, warning device does not have output signal.In the time of slipping of the belt; baffle plate can stay cool along with driving drum; approach switch and baffle plate lose and effectively approach apart from not moving; now time relay KT1, KT2 timing can not reset and automatic clear; in the time that timing reaches setting-up time T; time relay coil KT1, KT2 adhesive; time relay KT3 is in "on" position; also adhesive of coil after setting delay time; warning device energising output signal carry out jingle bell warning; warn staff's belt in sipping fault state, and cut off motor power and shut down processing controls.Alarm output signal can also enter PLC and shows slipping of the belt and control belt, also can more simplify circuit, with the output of approach switch directly arrive Computer I O template, enter computer system, remove to control the alarm and control that skids of belt by program.
Often can there is binder skidding in four cleaned coal band conveyors of certain coal preparation plant's second floor; and belt has only retained deviation switch and pull switch while installing, after decide the slipping of the belt detecting & monitoring that adopts this belt skidding detecting device to be applied to these four cleaned coal band conveyors.Through operation for a long time, four equal zero failures of band conveyor, operational excellence, has realized safety in production.
Fig. 4 is that belt skidding detecting device of the present invention uses scheme of installation.On band conveyor driving drum 1, block 2 for installation and measuring is installed approach switch 7 by bearing 6 on Belt Conveying machine support 5, and approach switch output signal is drawn by wire 4.Block 2 is used in conjunction with approach switch 7, and coordinating distance is 10~20mm.Detecting device is connected with warning device, in the time that band conveyor normally moves, block 2 on driving drum 1 rotates thereupon, every rotation one week, block and approach switch approach once, block 2 affects approach switch 7 and makes it conducting once, time relay can reset and automatic clear once, now time relay does not have output signal, and warning device is failure to actuate.In the time that belt 3 skids, driving drum 1 can not rotate, and stays cool, and block 2 also can not be rotated further, now approach switch can conducting, makes intermediate relay KJ1 or KJ2 magnet coil obtain electric, intermediate relay KJ1, KJ2 normally closed contact disconnect, time relay KT1, KT2 be in time status, when time delay is to setting-up time T, and normally closed contact closure, make time relay KT3 adhesive, utilize time relay KT3 conducting time delay, electric bell HA energising, enters alarm condition.Time relay KT4 is connected with the intermediate relay KM in motor control loop, and when after time relay K T3 adhesive, time relay KT4 switches on, and utilizes the power cut off delay characteristic of time relay KT4, makes intermediate relay KM power-off, reaches the object of controlling motor.

Claims (8)

1. the belt of belt conveyor method of inspection that skids, it is as follows that it realizes the detecting step that belt of belt conveyor skids:
1) on Belt Conveying machine support, be fixedly installed at least two group detector switches, and on the inner edge of driving drum one end of described band conveyor, a block being used in conjunction with described detector switch is set, described detector switch and described block correspondence, be arranged on the outer side frame of driving drum;
2) often circle as one-period taking driving drum, set a time period t that is greater than T period, utilize counting or time set to detect in real time the output switching signal of two groups of detector switches;
3) if can't detect the output switching signal that detector switch sends in described time period t, be judged as slipping of the belt, by slug relay's output alarm or control signal.
2. the belt of belt conveyor according to claim 1 method of inspection that skids, it is characterized in that: adopt two groups of modes that detector switch is connected in parallel, each shunt circuit connects an intermediate relay, in described each intermediate relay control loop, connect a time relay, complete the output switching signal that detects two groups of detector switches in described time period t, described time relay output contact access warning circuit.
3. the belt of belt conveyor according to claim 1 and 2 method of inspection that skids, it is characterized in that: described detector switch adopts proximity Hall switch, travel switch, infrared sensing switch or capacitance-sensitive switch, have or not by the output switching signal that detects detector switch the running state that reflects driving drum.
4. the belt of belt conveyor according to claim 3 method of inspection that skids, it is characterized in that: conducting time delay and the power cut off delay characteristic of utilizing time relay, set a time period t to time relay, in the time of belt normal operation, when time relay also starts to walk, in the time that detector switch and baffle plate approach, time relay power-off once, it is resetted and zero clearing after while continuing to walk, the zero clearing that so repeatedly resets detects while walking; Once there is slipping of the belt phenomenon, detector switch in time period t without on-off signal output, the time relay zero clearing that can not reset, timing time is to time relay coil adhesive, by warning circuit output alarm signal.
5. the belt of belt conveyor according to claim 4 method of inspection that skids, it is characterized in that: in the output control circuit of time relay, the power-off control loop that be provided with band conveyor motor in parallel with warning circuit, the power-off control of skidding in situation to realize band conveyor.
6. realize the skid belt skidding detecting device of method of inspection of belt of belt conveyor described in claim 1 for one kind, comprise detector switch, intermediate relay, time relay, annunciator, it is characterized in that: described detector switch is at least two groups, power by Switching Power Supply, in every group of detector switch loop, connect an intermediate relay, in described each intermediate relay control loop, connect a time relay, the master cock parallel connection of described time relay, access slug relay's control loop, the master cock output signal of described slug relay connects annunciator or Belt Conveying tester in power-down state control loop.
7. belt skidding detecting device according to claim 6, it is characterized in that: comprise the block being used in conjunction with described detector switch, described block is arranged on the inner edge of described band conveyor driving drum one end, described detector switch is fixed in band conveyor frame by erection support, described detector switch and described detection block correspondence, be distributed on the inner edge outer circumference outline line of described driving drum one end.
8. according to the belt skidding detecting device described in claim 6 or 7, it is characterized in that: comprise band conveyor power-off control circuit, described band conveyor power-off control circuit comprises control relay, intermediate relay, described control relay drive coil is in parallel with described annunciator, and described control relay control output signal connects the intermediate relay in band conveyor power-off control circuit.
CN201410269198.3A 2014-06-17 2014-06-17 A kind of belt of belt conveyor skidding method of inspection and belt skidding detecting device thereof Expired - Fee Related CN104030004B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106628942A (en) * 2016-12-25 2017-05-10 安徽华天机械股份有限公司 Control circuit system of automatic cloth counting and stacking machine
CN109109452A (en) * 2018-07-24 2019-01-01 重庆安卡自动化工程有限公司 Anilox roll control system for corrugated paper box printing machine tool
CN109422080A (en) * 2017-08-25 2019-03-05 辛鹏 A kind of belt of belt conveyor skidding detection method and its belt skidding detecting device
CN110562699A (en) * 2019-09-18 2019-12-13 翁松 Speed protection method, device, equipment and system of belt conveyor
CN111013210A (en) * 2019-12-23 2020-04-17 鞍钢集团矿业有限公司 Alarm device for fault parking of thickener
CN114834849A (en) * 2022-05-10 2022-08-02 内蒙古大中矿业股份有限公司 Mine belt conveyor slip detection device and control method
CN114890089A (en) * 2022-05-10 2022-08-12 首钢京唐钢铁联合有限责任公司 Belt edge tearing detection device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1038257A (en) * 1988-05-31 1989-12-27 牡丹江市环境科学研究所 Small Sewage Treatment Equipment and technology thereof
KR20040055854A (en) * 2002-12-23 2004-06-30 주식회사 포스코 An Apparatus for Sensing the Conveyor Belt's Slip
JP2012071925A (en) * 2010-09-28 2012-04-12 Ube Techno Enji Kk Method and mechanism for detecting belt slip of conveyor device
CN202784730U (en) * 2012-06-18 2013-03-13 内蒙古包钢钢联股份有限公司 Detecting and alarming device of slipping of belt
CN103508178A (en) * 2012-06-20 2014-01-15 上海梅山钢铁股份有限公司 Method for preventing slipping of lower belt of blast furnace groove

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1038257A (en) * 1988-05-31 1989-12-27 牡丹江市环境科学研究所 Small Sewage Treatment Equipment and technology thereof
KR20040055854A (en) * 2002-12-23 2004-06-30 주식회사 포스코 An Apparatus for Sensing the Conveyor Belt's Slip
JP2012071925A (en) * 2010-09-28 2012-04-12 Ube Techno Enji Kk Method and mechanism for detecting belt slip of conveyor device
CN202784730U (en) * 2012-06-18 2013-03-13 内蒙古包钢钢联股份有限公司 Detecting and alarming device of slipping of belt
CN103508178A (en) * 2012-06-20 2014-01-15 上海梅山钢铁股份有限公司 Method for preventing slipping of lower belt of blast furnace groove

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106628942A (en) * 2016-12-25 2017-05-10 安徽华天机械股份有限公司 Control circuit system of automatic cloth counting and stacking machine
CN108100612A (en) * 2016-12-25 2018-06-01 安徽华天机械股份有限公司 A kind of control method of amount ink recorder circuit system
CN109422080A (en) * 2017-08-25 2019-03-05 辛鹏 A kind of belt of belt conveyor skidding detection method and its belt skidding detecting device
CN109109452A (en) * 2018-07-24 2019-01-01 重庆安卡自动化工程有限公司 Anilox roll control system for corrugated paper box printing machine tool
CN110562699A (en) * 2019-09-18 2019-12-13 翁松 Speed protection method, device, equipment and system of belt conveyor
CN111013210A (en) * 2019-12-23 2020-04-17 鞍钢集团矿业有限公司 Alarm device for fault parking of thickener
CN114834849A (en) * 2022-05-10 2022-08-02 内蒙古大中矿业股份有限公司 Mine belt conveyor slip detection device and control method
CN114890089A (en) * 2022-05-10 2022-08-12 首钢京唐钢铁联合有限责任公司 Belt edge tearing detection device

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