CN203705030U - Powder material automatic weighing system based on PLC and variable frequency motor - Google Patents

Powder material automatic weighing system based on PLC and variable frequency motor Download PDF

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Publication number
CN203705030U
CN203705030U CN201320878524.1U CN201320878524U CN203705030U CN 203705030 U CN203705030 U CN 203705030U CN 201320878524 U CN201320878524 U CN 201320878524U CN 203705030 U CN203705030 U CN 203705030U
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CN
China
Prior art keywords
variable
weighing
frequency motor
frequency
plc
Prior art date
Application number
CN201320878524.1U
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Chinese (zh)
Inventor
罗开国
张金菊
龚芝
Original Assignee
湖南信息科学职业学院
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Filing date
Publication date
Application filed by 湖南信息科学职业学院 filed Critical 湖南信息科学职业学院
Priority to CN201320878524.1U priority Critical patent/CN203705030U/en
Application granted granted Critical
Publication of CN203705030U publication Critical patent/CN203705030U/en

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Abstract

The utility model discloses a powder material automatic weighing system based on a PLC and a variable frequency motor; the system comprises a blanking hopper, a frequency-variable controller, a variable frequency motor , a spiral propulsion machine, a weighing hopper, a weighing sensor, a bagging device, a photoelectric sensor and an input unit; feeding is fast and accurate by employing the variable frequency motor and the spiral propulsion machine; the variable frequency motor is stable in operation, quiet, and long in service life; the resistor foil gauge type weighing sensor is high in precision, and is not interfered by environment and temperature; the PLC controller looped control system is employed, so the whole weighing system is high in metering accuracy, fast in weighing speed, thereby realizing automatic weighting process.

Description

A kind of powder material automatic material weighing system based on PLC and variable-frequency motor
Technical field
The utility model relates to a kind of powder material automatic material weighing system based on PLC and variable-frequency motor.
Background technology
Urgent for 20~100 kilograms of powder particle material Automatic weighing and packaging machine demands in the market, demand is very big, of many uses, as: the packing of mechanism rice, flour, cereal etc., especially for the packing department of the industries such as valuable breeze, fine chemical material, food, medicine, various adjuvant, valuable granule materials, require especially high speed, high precision, the automatic material weighing system that productive capacity is stronger.
Utility model content
It is not high that the purpose of this utility model is to overcome in prior art powder material weighing precision, and the problem that speed is lower, provides a kind of powder material automatic material weighing system based on PLC and variable-frequency motor.
A kind of powder material automatic material weighing system based on PLC and variable-frequency motor, comprise hopper, frequency-variable controller, variable-frequency motor, screw propeller, weighing bucket, LOAD CELLS, sack-filling device, photoelectric sensor and input block, described variable-frequency motor, LOAD CELLS, sack-filling device, photoelectric sensor, sack-filling device and input block are all connected with frequency-variable controller;
Described screw propeller is installed on hopper below, and one end of screw propeller is connected with variable-frequency motor, and the other end is communicated with the porch of weighing bucket by pipeline;
Described LOAD CELLS is arranged at weighing bucket below, and is connected with described frequency-variable controller.
Described LOAD CELLS is resistance strain-gauge transducer.
Also comprise the display unit being connected with described frequency-variable controller.
Also comprise the printing and the storage unit that are connected with described frequency-variable controller.
Beneficial effect
The utility model provides a kind of powder material automatic material weighing system based on PLC and variable-frequency motor, comprise hopper, frequency-variable controller, variable-frequency motor, screw propeller, weighing bucket, LOAD CELLS, sack-filling device, photoelectric sensor and input block, adopt variable-frequency motor and screw propeller feeding fast, accurate, variable-frequency motor smooth running, peace and quiet, life-span are long; Adopt the LOAD CELLS precision of resistance-strain chip high, and be not subject to the interference of environment and temperature; The closed-loop control system that adopts PLC controller place, makes whole weighing system metering precision high, and weighing speed is fast, realizes automatic weighing process.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is control system structured flowchart of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and example, the utility model is described further.
As shown in Figure 1, a kind of powder material automatic material weighing system based on PLC and variable-frequency motor, comprise hopper, frequency-variable controller, variable-frequency motor, screw propeller, weighing bucket, LOAD CELLS, sack-filling device, photoelectric sensor and input block, described variable-frequency motor, LOAD CELLS, sack-filling device, photoelectric sensor, sack-filling device and input block are all connected with frequency-variable controller;
Described screw propeller is installed on hopper below, and one end of screw propeller is connected with variable-frequency motor, and the other end is communicated with the porch of weighing bucket by pipeline;
Described LOAD CELLS is arranged at weighing bucket below, and is connected with described frequency-variable controller.
Described LOAD CELLS is resistance strain-gauge transducer.
Also comprise the display unit being connected with described frequency-variable controller.
Also comprise the printing and the storage unit that are connected with described frequency-variable controller.
As shown in Figure 2, be control system structured flowchart of the present utility model, variable-frequency motor is the frequency-variable controller control by closed loop automatic control system control, variable-frequency motor rotation speed n: n=60f1 (1-s)/p
In above formula, f1-stator line frequency, the number of pole-pairs of p-motor; S-revolutional slip, belongs to the intrinsic parameter of variable-frequency motor.By changing the voltage of power supply and the frequency f of power supply 1, change the rotation speed n of motor, the frequency of frequency-variable controller output is higher, and the speed of variable-frequency motor is faster, the speed of the screw propeller pusher of connecting shaft is also just faster with it, and weighing sensor is also faster to the weighing speed of weighing bucket; Otherwise frequency-variable controller output frequency is lower, the speed of weighing is just slower.
Set by input block the weight of weighing, utilize the weight data of LOAD CELLS Real-time Collection and the weight input comparator of weighing of setting, comparer is delivered to both differences the input end of frequency-variable controller, according to the rotating speed of difference control variable-frequency motor, thereby control the speed that material enters weighing bucket, and then the weight of control charging, because frequency-variable controller is controlled accurately, the accurate motion of variable-frequency motor, drive screw propeller accurately moving along with variable-frequency motor, thereby accurately carry out feeding, solve high speed and the high precision problem of material weighing.
In the time that frequency-variable controller output control signal stops variable-frequency motor work, detect the signal of photoelectric sensor transmission simultaneously, have packaging bag if photoelectric sensor detects weighing bucket below, frequency-variable controller output control signal starts working sack-filling device to carry out material bagging.

Claims (4)

1. the powder material automatic material weighing system based on PLC and variable-frequency motor, it is characterized in that, comprise hopper, frequency-variable controller, variable-frequency motor, screw propeller, weighing bucket, LOAD CELLS, sack-filling device, photoelectric sensor and input block, described variable-frequency motor, LOAD CELLS, sack-filling device, photoelectric sensor, sack-filling device and input block are all connected with frequency-variable controller;
Described screw propeller is installed on hopper below, and one end of screw propeller is connected with variable-frequency motor, and the other end is communicated with the porch of weighing bucket by pipeline;
Described LOAD CELLS is arranged at weighing bucket below, and is connected with described frequency-variable controller.
2. the powder material automatic material weighing system based on PLC and variable-frequency motor according to claim 1, is characterized in that, described LOAD CELLS is resistance strain-gauge transducer.
3. the powder material automatic material weighing system based on PLC and variable-frequency motor according to claim 2, is characterized in that, also comprises the display unit being connected with described frequency-variable controller.
4. the powder material automatic material weighing system based on PLC and variable-frequency motor according to claim 3, is characterized in that, also comprises the printing and the storage unit that are connected with described frequency-variable controller.
CN201320878524.1U 2013-12-29 2013-12-29 Powder material automatic weighing system based on PLC and variable frequency motor CN203705030U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320878524.1U CN203705030U (en) 2013-12-29 2013-12-29 Powder material automatic weighing system based on PLC and variable frequency motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320878524.1U CN203705030U (en) 2013-12-29 2013-12-29 Powder material automatic weighing system based on PLC and variable frequency motor

Publications (1)

Publication Number Publication Date
CN203705030U true CN203705030U (en) 2014-07-09

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CN (1) CN203705030U (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104166394A (en) * 2014-08-21 2014-11-26 上海朗脉洁净技术股份有限公司 Weighing room control system and method and programmable logic controller
CN104949744A (en) * 2015-07-07 2015-09-30 中国矿业大学 Automatic weighing machine for granular products in supermarket
CN105904603A (en) * 2016-06-07 2016-08-31 苏州禾昌聚合材料股份有限公司 Extrusion pelletization finished product mixing device
CN106352963A (en) * 2016-08-31 2017-01-25 上海空间电源研究所 Automatic weighing system for high-viscosity thermal battery powder
CN106404136A (en) * 2016-06-20 2017-02-15 襄城县创世纪科技咨询有限公司 Electronic automation weighing device
CN107570039A (en) * 2017-10-29 2018-01-12 佛山市高明区云大机械科技有限公司 A kind of control method of agricultural frequency-conversion agitator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104166394A (en) * 2014-08-21 2014-11-26 上海朗脉洁净技术股份有限公司 Weighing room control system and method and programmable logic controller
CN104949744A (en) * 2015-07-07 2015-09-30 中国矿业大学 Automatic weighing machine for granular products in supermarket
CN105904603A (en) * 2016-06-07 2016-08-31 苏州禾昌聚合材料股份有限公司 Extrusion pelletization finished product mixing device
CN105904603B (en) * 2016-06-07 2018-11-09 苏州禾昌聚合材料股份有限公司 A kind of extruding pelletizing finished product mixing device
CN106404136A (en) * 2016-06-20 2017-02-15 襄城县创世纪科技咨询有限公司 Electronic automation weighing device
CN106352963A (en) * 2016-08-31 2017-01-25 上海空间电源研究所 Automatic weighing system for high-viscosity thermal battery powder
CN107570039A (en) * 2017-10-29 2018-01-12 佛山市高明区云大机械科技有限公司 A kind of control method of agricultural frequency-conversion agitator

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GR01 Patent grant
EXPY Termination of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140709

Termination date: 20141229