CN2159551Y - Induced material flow detector - Google Patents

Abstract

The utility model belongs to a belt conveyer detection device for materials transportation state. The lower side of an adhesive tape is provided with a suspension support induced roller; the tail end of the support arm is axially connected with the input end of a time base component IC1 with a torsion spring to form an induced device, and the time base unit is arranged in a control case; the output end of the time base component IC1 is connected with the input end of a mono-stable triggering component IC2 whose integral output end is delivered into the inverted input end of a comparing component IC3 whose output end is delivered to the input end of a Schmitt trigger circuit; the output end of an IC4 is connected with a relay J which is connected with a light emitting diode D2-D3. The utility model does not be influenced by the flow speed of the materials, the tension force of the adhesive tape and impact vibration. The detection is high in precision, and has long service life.

Description

Induced material flow detector

The utility model belongs to belt conveyor haul status detection device.

At present, flow detector commonly used is the contact detection mode, and its product has gate-type flow detector and pressure lever type flow detector.The gate-type flow detector is outstanding one to touch bat above adhesive tape, touches during no material on the adhesive tape and claps by action of gravity in vertical state, when material during by detecting device, touches bat beat under material promotes with adhesive tape, reflects the flow state of materials flow with the beat degree of touching bat; (1.2～6.8m/s), the maldistribution on adhesive tape is clapped when bumping against its impulsive force and is enough to make touch and claps and whole detecting device damages with touching when the material of projection, and its serviceable life is extremely low because the flow velocity of material is big.The pressure lever type flow detector is the depression bar that generation roller is set under adhesive tape, and when on the adhesive tape material being arranged, the gravity of material makes roller move down together with depression bar, reflects the flow state of material with the amount of moving down of depression bar; It is bigger that this detection mode is influenced by conveyor belt tension, less when material, and its gravity is still not enough when overcoming the tension force of adhesive tape, and this detecting device then can't be worked.

The purpose of this utility model provides a kind of accuracy of detection height, the materials flow pick-up unit of long service life.

Technical essential of the present utility model is: it is made up of sensing device and control box, the carrying roller that is equipped with below adhesive tape (1) is at a distance of 180～200mm place, the induction roller (2) that set support arm (3) front end suspends and supports, support arm (3) tail end is coupling and is with control box (4) the Nei Shiji assembly IC1 input end of torsion spring, constitutes sensing device; Time basic assembly IC1 output terminal in the control box connects monostable triggering assembly IC2 input end, the IC2 output terminal is through second order product dispensing comparing component IC3 inverting input, IC3 in-phase input end and reference voltage join, the IC3 output terminal constitutes the schmidt trigger circuit input end to time base assembly IC4, and IC4 output terminal pin connects the relay J that links to each other with light emitting diode D2～D3.

The utility model is contactless materials flow pick-up unit, and it is not subjected to the influence of material flow, conveyor belt tension and impact shock.Its accuracy of detection height, long service life.

Description of drawings:

Fig. 1 is a mounting structure synoptic diagram of the present utility model.

Fig. 2 is a control box inner control circuit voltage schematic diagram of the present utility model.

When having material to pass through on the conveyor belt running; DIELECTRIC CONSTANT between induction roller (2) electrode and frame changes; be that capacitor C changes; the time basic assembly IC1(model that causes linking to each other with the induction roller in the control box is NE555) square wave that is inversely proportional to of output frequency and capacitor C; it is CC4528 that this square wave is delivered to the IC2(model); potentiometer W1; resistance R 3; the monostable circuit that capacitor C 2 is formed; provide high level and the fixing square wave of width at its pin 10; after the second order product parallel circuit filtering of R4 and C3 and R5 and C4 composition; obtain galvanic current and press V1; sending comparing component IC3(model is LM311) compare with potentiometer W2 setting value V2; during V1＞V2; the IC3 output low level; through R7; C7 time-delay back to IC4(model is NE555) input end; IC4 output terminal pin 3 is a low level; the relay J action, light emitting diode D2 or D3 send normal or jam signal.

Claims (1)

1, a kind of induction type flow detector, have sensing device and control box, the carrying roller (1) that it is characterized in that being equipped with below adhesive tape is at a distance of 180～200mm place, the induction roller (2) that set support arm (3) front end suspends and supports, support arm (3) tail end is coupling and is with control box (4) the Nei Shiji assembly IC1 input end of torsion spring, constitutes sensing device; Time basic assembly IC1 output terminal in the control box connects monostable triggering assembly IC2 input end, the IC2 output terminal is through second order product dispensing comparing component IC3 inverting input, IC3 in-phase input end and reference voltage join, the IC3 output terminal constitutes the schmidt trigger circuit input end to time base assembly IC4, and IC4 output terminal pin meets the group electrical equipment J that links to each other with light emitting diode D2～D3.

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