CN201964440U

CN201964440U - Electronic-weighting coal feeder

Info

Publication number: CN201964440U
Application number: CN201120022343XU
Authority: CN
Inventors: 李娜; 卢丽; 张克范; 王希宁; 尤保常; 程辉; 李红; 李章才
Original assignee: Henan Tianguan Group Co Ltd
Current assignee: Henan Tianguan Group Co Ltd
Priority date: 2011-01-24
Filing date: 2011-01-24
Publication date: 2011-09-07
Anticipated expiration: 2021-01-24

Abstract

The utility model belongs to the field of coal feeder equipment and provides an electronic-weighting coal feeder. The electronic-weighting coal feeder is characterized by comprising a conveyor, sensors and controller arranged in the conveyor. A spindle of a velocity sensor is connected with a spindle of a coal feeding motor, and the spindle of the velocity sensor and the spindle of the coal feeding motor are concentric. The electronic-weighting coal feeder adopts the technical measure of installing the velocity sensor on the spindle of the coal feeding motor with the same rotating speed of a driven shaft, thereby improving working conditions of sensors, resolving the problem of the decentraction between the spindle of the velocity sensor and the driven shaft of the coal feeder, remarkably reducing the wear rate of the velocity sensor, prolonging the service life of the velocity sensor and facilitating daily maintenance work of maintenance personnel.

Description

Electronic weighing type coal feeder

Technical field

The utility model belongs to the feeder technical field, is specifically related to a kind of electronic weighing type coal feeder.

Background technology

The feeder controller is the visual plant of CFBB, and it not only will guarantee the continuous supply of boiler oil, and requires to adjust motor speed according to boiler load, carries out speed control, to guarantee boiler safety, operation stably.

At present, mainly have the high problem of fault rate in the existing feeder use, tracing it to its cause is that the sensor of controller detection speed signal of feeder also is unreasonable the causing in installation site of " velocity sensor ".

Operating personnel find in the practice process of the existing feeder of operation and maintenance: 1. be installed on the driven shaft of feeder owing to sensor, this driven shaft is in the following outlet of coal bunker, when producing coal, coal bunker causes chute blockage in the feeder when failsafe valve can't be closed easily, easy holding wire damage with velocity sensor in the process of chute blockage causes the feeder scram in the cleaning feeder; 2. on machining, deviation appears in the driven shaft bore size, cause the main shaft and the driven shaft decentraction of sensor, make sensor often be in swinging condition, thereby cause the sensor stand fracture, sensor comes off or goes between and twists off, and causes to carry out tachometric survey, controller can not correctly calculate the coal supply flow, also with regard to the work of uncontrollable feeder.Under the situation that coal-supplying amount can't be determined, cause boiler coke easily, even cause boiler to stop production.3. because the main shaft and the driven shaft decentraction of sensor, increased the friction between the outer shaft in the sensor, make the sensor measurement inaccuracy, and coal ash is many in the feeder, slit in the easy admission velocity sensor between the outer shaft, accelerate the rate of wear of velocity sensor, shortened the service life of velocity sensor.

Sensor price height in addition, frequent replacing can bring no small economic loss.

Feeder running environment is abominable in summary, uses frequently the fault rate height, especially velocity sensor, irrational installation site makes its frequent breakage, and is difficult for changing, once repeatedly in boiler operatiopn, broke down, influenced the ordinary production of manufacturer, safety in production had been brought threat.Bring economic loss to manufacturer.In addition, because velocity sensor and LOAD CELLS are installed in feeder inside, the dismounting trouble, maintenance inconvenience and efficient are low.

Summary of the invention

The medium-term and long-term operation and maintenance feeder of inventor's activity in production finds that there is above-mentioned defective in existing feeder, and the purpose of this utility model is to provide a kind of electronic weighing type coal feeder, with respect to existing feeder low, the easy to maintenance advantage that has fault rate.

For solving the problems of the technologies described above, the technical scheme that this practicality is taked is that described electronic weighing type coal feeder comprises: by the conveyer of carrying frame, cylinder, weighing carrier roller, conveying adhesive tape, coal supply motor to constitute and the PID controller of being made up of LOAD CELLS, velocity sensor and single-chip microcomputer, the main shaft of wherein said velocity sensor is connected with the main shaft of coal supply motor.

The main shaft of the main shaft of described velocity sensor and coal supply motor is concentric.

The utility model adopts abovementioned technology, velocity sensor be installed in the main shaft of driven shaft with the coal supply motor of rotating speed on, so both solved the problem of velocity sensor main shaft and feeder driven shaft decentraction, improved the working environment of sensor again, reduced the wear rate of velocity sensor, because the coal supply electric machine main shaft places the outside of feeder, to be convenient to observe, the convenient for maintaining personnel are to the line service of velocity sensor.

Description of drawings

Further specify concrete structure of the present utility model below in conjunction with drawings and Examples.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is an A part assembly structure schematic diagram among Fig. 1.

The specific embodiment

Referring to accompanying drawing, electronic weighing type coal feeder described in the utility model comprises: by the conveyer of carrying frame 1, cylinder 2, weighing carrier roller 3, conveying adhesive tape 4, coal supply motor 8 to constitute, in the above-mentioned executing agency of conveyer, embed the PID controller of forming by LOAD CELLS 5, velocity sensor 6 and single-chip microcomputer 7, the main shaft of wherein said velocity sensor 6 is connected with the main shaft of coal supply motor 8, and the main shaft of the main shaft of described velocity sensor 6 and coal supply motor 8 is concentric.

Coal dust enters feeder from coal bunker through coal feed point and delivers to coal outlet by metering conveying adhesive tape during use, below adhesive tape is carried in metering the very accurate weighing carrier roller of size Control is housed, and constitutes the span of weighing.A weighing carrier roller that is connected with the high-precision weighing sensor is housed in the middle of the span of weighing, LOAD CELLS just produces a signal of telecommunication that is directly proportional with ature of coal amount on the adhesive tape when the coal that is transferred is weighed span by this, this signal is given the feeder controller with data signal after the A/D conversion; The conveying tape speed that the while speed probe records is given the feeder controller with the form of pulse signal.The computing of above-mentioned signal process calculus can obtain the instantaneous delivery and the integrated flux of coal in controller.Controller internal PID adjuster, the demand coal amount signal that it sends the instantaneous flow rate signal that calculates and control system relatively after, export its deviation signal control variable-frequency governor and change adhesive tape drive motors rotating speed, make the actual fed amount consistent with demand.

Claims

1. electronic weighing type coal feeder, comprise by the conveyer of carrying frame, cylinder, weighing carrier roller, conveying adhesive tape, coal supply motor to constitute with by the PID controller that LOAD CELLS, velocity sensor and single-chip microcomputer are formed, it is characterized in that the main shaft of described velocity sensor is connected with the main shaft of coal supply motor.

2. electronic weighing type coal feeder as claimed in claim 1 is characterized in that: the main shaft of the main shaft of described velocity sensor and coal supply motor is concentric.