CN2239020Y - Double-constant feed belt steelyard - Google Patents
Double-constant feed belt steelyard Download PDFInfo
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- CN2239020Y CN2239020Y CN 95239845 CN95239845U CN2239020Y CN 2239020 Y CN2239020 Y CN 2239020Y CN 95239845 CN95239845 CN 95239845 CN 95239845 U CN95239845 U CN 95239845U CN 2239020 Y CN2239020 Y CN 2239020Y
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- steelyard
- belt
- motor
- asynchronous
- double
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Abstract
The utility model relates to a double-constant feed belt steelyard which is a belt steelyard with dynamic continuous conveying, dynamic measuring, and constant feeding functions based on the weighing principle of gravity. The double-constant feed belt steelyard is composed of a steelyard body, a load sensor, a speed measuring sensor, a control cabinet, and the bin of a matching device. The double-constant feed belt steelyard is characterized in that an electrical actuator part is arranged on the main loop of the asynchronous AC motor of the belt steelyard; a solid-state relay or a bidirectional thyristor is adopted; the speed measuring sensor adopts a magnetic induction speed measuring sensor which is arranged on the output shaft of the asynchronous AC motor; a microcomputer controller is composed of a CPU, a memory, a keyboard, a displayer, an I/O interface, an A/D transducer, a load signal amplifier, a communication part, a speed signal input, a watchdog circuit, a photoelectric isolation part, and a power part.
Description
What the utility model feeding method for double-constant feeding conveyer-belt weigher related to is a kind of dynamically conveying continuously, dynamic measurement, dosing belt conveyer scale based on gravity weighing principle, be applicable to industries such as building materials, chemical industry, metallurgy, coal, grain, realize industrial process controls such as Weighing, polycomponent batching.
Present cantilevered constant speed belt conveyer scale is the beam balance frame, and no snubber assembly is when material arrives zone face, to the running and the stressed serious interference of load sensor of scale frame.Operational throughput, the controlling object that supporting electro-vibrating feeder is regulated material is the shake amplitude of machine of electricity, the linear narrow range of working, is subjected to serious interference such as line voltage, frequency, mechanical vibration, control loop complexity, reliability low.And the supporting various bunchers of the speed governing type belt conveyer scale that uses are at present realized the adjusting to the material output quantity, controlling object is the rotating speed of buncher, when constituting Closed-Loop Speed Governing System, its control characteristic is subjected to the influence of multiple parameters such as raw meal particle size, storehouse pressure, line voltage, frequency, scale frame torque variation, in servicely be prone to vibration, unstable characteristics such as overshoot hysteresis, difficult parameters is to be stabilized to optimum condition.The closed-loop regulating system complexity of buncher, number of elements is many, reliability is low, when especially adopting DC MOTOR CONTROL and variable frequency regulating speed control, above-mentioned shortcoming is even more serious, itself also has bad adaptability when direct current generator is used in industry spot, safeguards complicated shortcoming.Variable frequency regulating speed control still is subjected to the restriction of import device, particularly major loop high power module at present.Domestic still do not have substitute products.When adopting the slip regulating speed motor, though can adopt easy controllable silicon half-bridge control, but in order to obtain high-quality control characteristic, still need adopt the controlling schemes of multiloop, thereby the reduction reliability index, the high anti-dust ability of slip electric motor energy consumption, range of adjustment are narrow etc. in addition brings intrinsic defective all for the speed governing type belt conveyer scale.
The objective of the invention is provides a kind of pair of constant feeding belt conveyer scale at the weak point that above-mentioned belt conveyer scale exists, adopt the time control mode of dynamic consecutive weighings, dosing, by the detection of weight of material and the comparison of specified rate, its error is eliminated with the mode of the increase and decrease cycle of operation, thereby has realized accurate metering, dosing, stable operation.
Feeding method for double-constant feeding conveyer-belt weigher is realized in the following manner: two constant feeding belt conveyer scale primary structures are made of scale body, load sensor, magnetic induction tachogenerator, switch board and corollary apparatus feed bin.Electric executive component part, electric protection componentry, microcomputerized controller are housed in the switch board.Scale body primary structure is made of frame, drive roll, driven cylinder, sideslip adjuster, annular feed belt, feed belt degree of tightness carrying roller, link code frame, center weighing carrying roller and weighing mechanism, load sensor, cross reed, balance weight iron, asynchronous AC motor, magnetic induction tachogenerator, reductor, driving-chain.Electric executive component partly is contained in and can adopts solid-state relay or bidirectional triode thyristor, electric protection componentry to comprise electrothermal relay, air switch on the major loop of belt conveyer scale asynchronous AC motor.Microcomputerized controller mainly is made up of CPU, memory, keyboard, display, I/O interface, A/D conversion, loading signal amplifier, communication part, rate signal input, watchdog circuit, photoelectricity isolated part, power unit.The magnetic induction tachogenerator is contained on the asynchronous AC motor output shaft, the rotating speed of motor signal is detected by the magnetic induction tachogenerator on motor output shaft and gives microcomputerized controller and handle, the rate signal that loading signal that is recorded by load sensor and magnetic induction tachogenerator record can calculate flow and semi-invariant, can set the operational throughput of material on microcomputerized controller.The corollary apparatus feed bin is contained in feed belt buffering top, transportation section, leans against driven cylinder one end.Feed bin is made of feed bin, gate, feed opening, feed opening bed of material adjustable plate.
Two constant feeding belt conveyer scales provide high-quality consecutive weighings, dosing equipment with diverse control mode, do not need other any feeding device to regulate the thickness of feed layer of belt conveyer scale in this equipment running process, just thickness of feed layer need not regulated, motor speed is fixing need not regulated, controlling object is the time, by the detection of weight of material and the comparison of specified rate, its error is eliminated with the mode of the increase and decrease cycle of operation, thereby realizes the adjusting of dosing and material output quantity.Because this belt conveyer scale adopts the time control mode, not disturbed by various rugged surroundings of industry spot and the various amount of influence.The appearance of this control mode constant feed weigher makes the commercial Application of belted electronic balance reach higher level.Because this weighing-appliance is regulated quick and precisely if having time, motor is open loop control, the control loop link is few, number of elements is few, simple and direct clear easy operating safeguards that the device context adaptive faculty is strong, accurately measures stable.
The invention will be further described below with reference to accompanying drawing.
Fig. 1 is two constant feeding belt conveyer scale structural representations.
Fig. 2 is two constant feeding belt conveyer scale microcomputerized controller schematic diagrams.
Fig. 3 is two electric operating parts of constant feeding belt conveyer scale, protecting component part synoptic diagram.
Has frame (21) with reference to 1 pair of constant feeding belt conveyer scale of accompanying drawing primary structure, frame one end is equipped with drive roll (1), the other end is equipped with driven cylinder (7), annular transmission belt (2) is contained on the driving and driven cylinder, sideslip adjuster (8) is housed on the driven cylinder (7), carrying roller (22) is equipped with on frame (21) top, with rest annular feed belt (2), frame lower is equipped with belt degree of tightness carrying roller (9) to regulate the feed belt degree of tightness, and belt deviation automatic regulating apparatus (10) also is housed.Center weighing carrying roller and weighing mechanism (4) are contained in the responsive part of upper rack weighing (feed belt weighing sensitive segment), and link code frame (5), cross reed (15), balance weight iron (16) are housed; Load sensor (3) is contained in weighing mechanism (4) bottom.Link to each other with switch board (20) by transmission line, electric executive component part is housed in the switch board (20), protecting component part, microcomputerized controller, asynchronous AC motor (13) output shaft link to each other with reductor (12); Reductor can adopt the single-stage reduction gear, is contained on asynchronous AC motor (13) output shaft by driving-chain (11) drive master rotor (1), magnetic induction tachogenerator (14), links to each other with switch board (20) by transmission line.The corollary apparatus feed bin is contained in belt conveyer scale buffering top, transportation section, is made of feed bin (19), gate (18), feed opening (17), feed opening bed of material adjustable plate.Gate (18) is contained between feed bin (19) bottom and the feed opening (17), and feed opening bed of material adjustable plate (6) is equipped with in the feed opening outlet.
With reference to accompanying drawing 3, electric executive component partly is contained on the major loop of belt conveyer scale, asynchronous AC motor D1, adopts solid-state relay or bidirectional triode thyristor, SD11, SD12, SD13, and be connected with microcomputerized controller.Protecting component comprises that partly electrothermal relay RJ1 is contained on the three-phase power line of motor D 1, and air switch ZK1 is a three-phase power switch.
With reference to accompanying drawing 2, the microcomputerized controller schematic diagram.Microcomputerized controller mainly is made up of CPU, memory, keyboard, display, I/O interface, A/D conversion, loading signal amplifier, communication part, rate signal input, watchdog circuit, photoelectricity isolated part, power unit.It is central processing unit that the CPU microcomputerized controller adopts high-grade 8 single-chip microcomputers of MCS-51 series, advantages such as this series monolithic has the integrated level height, function is strong, working temperature is wide, reliable operation.
Memory: expanded a slice 6264 random memories in the control circuit, a slice 27128 read-only memorys, the 6264th, the random memory of a slice 8KBX8 is used for depositing some parameters that parameters and operational process computing machine by the keyboard input obtain.6264 by a reliable power down protection circuit supply, and shutdown or power failure data can not lost, and 27128 is a 16KBX8 read-only memory, deposits whole programs of controller.
Keyboard, display; Controller has 16 of 16 light-emitting diode displays and touches film key, 16 displays are divided into left and right two viewing areas, respectively be used to show the relevant data of A, B two platform balances, wherein preceding 6 display parameter values, the 7th display parameter code, lowest order is used for alarm indication, the various operations of 16 buttons of controller to the control device, wherein a key is a shift key, is used for switching keyboard to A road scale or the operation of B road scale.Keyboard and display are by a slice 8279 module managements.
The I/O interface: controller has been expanded two 8255, wherein 8255 (1) PA mouths are used to export digital quantity to 4 0832 (DAC), by the transformation result of its output A, B two platform balance average discharges and long-pending amount analog signals, PB mouth reception modulus parallel operation AD574, the PC mouth is used for the channel selecting of DAC0832 and AD574.The part of 8255 (2) PC mouth is used to export the switching value control signal, and this signal is sent to solid-state relay or bidirectional triode thyristor control motor through the 74LS245 buffering.8255 (2) PA mouths receive outside given switching signal, to determine present flow rate by outer still inner setting.The part of PB mouth and PC mouth constitutes a printer interface.
The A/D conversion: the analog to digital conversion of controller is finished by AD574, it will become 12 bit digital quantity through the loading conversion of signals that amplifier amplifies, giving CPU by 8255 (1) PB mouth again handles, because controller will be controlled two platform balances, therefore AD574 will change two-way loading signal respectively, and this work is finished by multi-way switch MC4051 and 8255 (1) part PC mouths.
It is the millivolt level that loading signal amplifier, load sensor are sent voltage signal, must just can send AD574 to change after amplifying, and MC1558 and OP07 have formed instrumentation amplifier, can be with the 10V of millivolt voltage amplification to full scale.
Communication part: this part is finished the interface communication with host computer RS232 by 1488 and 1489, utilize this function can constitute master-slave mode multi computer communication system, several controllers of a upper managing computer control, and need not the I/O of direct modeling amount, can finish the exchanges data of upper and lower machine by this mouthful.
The rate signal input: the magnetic induction velometer is given CPU with the pulse signal that records by 8253 and is handled.
House dog: watchdog circuit is made of monostalbe trigger 74LS123, and it is monitoring the duty of controller all the time, in case crash, this circuit can make controller get back to normal state of a control rapidly.
Photoelectricity is isolated: this part is made up of multi-disc TLP521-4 photoelectrical coupler, and it makes, and controller control section and peripheral circuit are electric to be separated fully, can prevent effectively that undesired signal from sealing in, and improved the reliability of system.
Power supply: have seven groups of power supplys, wherein control section have+5V, ± three groups of 12V, the simulation part has+5V, ± 12V ,+four groups of 10V, wherein ± 12V ,+10V adopted two adjustable circuit, the stability of voltage is improved, thereby has guaranteed the precision of weighing.
Claims (1)
1. a two constant feeding belt conveyer scale is made of scale body, load sensor, tachogenerator, switch board, corollary apparatus feed bin; Scale structure is made of frame, drive roll, driven cylinder, sideslip adjuster, annular feed belt, feed belt degree of tightness carrying roller, link code frame, center weighing carrying roller and weighing mechanism, load sensor, cross reed, balance weight iron, asynchronous AC motor, reductor, driving-chain; Electric executive component part, electric protection componentry, microcomputerized controller are housed in the switch board; The corollary apparatus feed bin is made of feed bin, gate, feed opening, feed opening bed of material adjustable plate, it is characterized in that electric executive component partly is contained on the major loop of belt conveyer scale asynchronous AC motor, adopts solid-state relay or bidirectional triode thyristor; Tachogenerator is adopted the magnetic induction tachogenerator, is contained on the asynchronous AC motor output shaft; Microcomputerized controller is made up of CPU, memory, keyboard, display, I/O interface, A/D conversion, loading signal amplifier, communication part, rate signal input, watchdog circuit, photoelectricity isolated part, power unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95239845 CN2239020Y (en) | 1995-05-31 | 1995-05-31 | Double-constant feed belt steelyard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95239845 CN2239020Y (en) | 1995-05-31 | 1995-05-31 | Double-constant feed belt steelyard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2239020Y true CN2239020Y (en) | 1996-10-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95239845 Expired - Fee Related CN2239020Y (en) | 1995-05-31 | 1995-05-31 | Double-constant feed belt steelyard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2239020Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109375A (en) * | 2010-11-29 | 2011-06-29 | 山西长治维特衡器有限公司 | Fixed-value belt weigher rapid loading system |
| CN102953755A (en) * | 2011-08-31 | 2013-03-06 | 淮南矿业(集团)有限责任公司 | Mine material loading control method and control device as well as mine material loading system |
| CN104236686A (en) * | 2014-09-12 | 2014-12-24 | 杭州中南电子工程有限公司 | High-precision electronic belt scale |
| CN105217280A (en) * | 2015-09-17 | 2016-01-06 | 苏州新协力特种工业模板有限公司 | A kind of belted electronic balance automatic recipe maker |
| CN105675110A (en) * | 2016-04-20 | 2016-06-15 | 北京万向新元科技股份有限公司 | One-stage rubber compound online weighing and verification method and system |
| CN106774016A (en) * | 2017-02-13 | 2017-05-31 | 常熟理工学院 | A kind of SCM Based intelligent material control device |
| CN107271007A (en) * | 2017-04-20 | 2017-10-20 | 广州追远电气机械有限公司 | Large range high precision electromagnetism load cell |
| CN107487464A (en) * | 2016-06-10 | 2017-12-19 | 天津山口汽车紧固件制造有限公司 | One kind automatically controls feed device and its feeding method |
| CN109470341A (en) * | 2018-11-02 | 2019-03-15 | 贵州大学 | A kind of capsule automatic weighing machine with insulation blocking function |
-
1995
- 1995-05-31 CN CN 95239845 patent/CN2239020Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109375A (en) * | 2010-11-29 | 2011-06-29 | 山西长治维特衡器有限公司 | Fixed-value belt weigher rapid loading system |
| CN102109375B (en) * | 2010-11-29 | 2012-12-26 | 山西长治维特衡器有限公司 | Fixed-value belt weigher rapid loading system |
| CN102953755A (en) * | 2011-08-31 | 2013-03-06 | 淮南矿业(集团)有限责任公司 | Mine material loading control method and control device as well as mine material loading system |
| CN104236686A (en) * | 2014-09-12 | 2014-12-24 | 杭州中南电子工程有限公司 | High-precision electronic belt scale |
| CN105217280A (en) * | 2015-09-17 | 2016-01-06 | 苏州新协力特种工业模板有限公司 | A kind of belted electronic balance automatic recipe maker |
| CN105675110A (en) * | 2016-04-20 | 2016-06-15 | 北京万向新元科技股份有限公司 | One-stage rubber compound online weighing and verification method and system |
| CN107487464A (en) * | 2016-06-10 | 2017-12-19 | 天津山口汽车紧固件制造有限公司 | One kind automatically controls feed device and its feeding method |
| CN106774016A (en) * | 2017-02-13 | 2017-05-31 | 常熟理工学院 | A kind of SCM Based intelligent material control device |
| CN107271007A (en) * | 2017-04-20 | 2017-10-20 | 广州追远电气机械有限公司 | Large range high precision electromagnetism load cell |
| CN107271007B (en) * | 2017-04-20 | 2023-12-08 | 广州追远电气机械有限公司 | Large-range high-precision electromagnetic weighing sensor |
| CN109470341A (en) * | 2018-11-02 | 2019-03-15 | 贵州大学 | A kind of capsule automatic weighing machine with insulation blocking function |
| CN109470341B (en) * | 2018-11-02 | 2023-05-16 | 贵州大学 | Automatic capsule weighing machine with isolation and protection functions |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |