CN2666555Y

CN2666555Y - Testing device for feeding test of crusher

Info

Publication number: CN2666555Y
Application number: CN 03248607
Authority: CN
Inventors: 赵文彬
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-08-26
Filing date: 2003-08-26
Publication date: 2004-12-29
Anticipated expiration: 2013-08-26

Abstract

The utility model discloses a detector used for a material inlet detection of a crusher. The utility model comprises a detecting coil used for collecting signals, a multivibrator, a differential detection amplifier and a control relay which are sequentially connected; wherein, the installation of the detecting coil can be close to a material inlet conveying belt. As the installation of the detecting coil of the utility model can be close to the material inlet conveying belt, when the stone materials have metal objects, an inductive signal can be produced to the detecting coil to cause the metal objects in the stone materials to be detected out and removed before entering the crusher, thus effectively protecting the crusher, shortening the shutdown time when the crusher eliminates the malfunction and improving the production efficiency at the same time.

Description

Feed of crusher detects the detector of usefulness

Technical field:

The utility model relates to the detector that a kind of feed of crusher detects usefulness.

Background technology:

Crusher in crushing stone; often need carry out secondary or repeatedly broken (by the continuous productive process that transmits with conveyer belt); massive stone is sent into another disintegrating machine by conveyer belt and is carried out once more broken after primary crushing; the Luo bolt of (mainly being the primary crushing machine) in the equipment during this; maintenance tool; iron block all might enter into building stones; and then fall in the recursher; equipment is caused great damage; the metal object that falls into slowly be sought and be removed to service worker must with magnet simultaneously; if metal object is stuck in equipment; taking-up is very difficult; so can cause long downtimes, thereby influence is produced.

The utility model content:

Can not prevent the problem that metal object falls at existing disintegrating machine, the utility model provides a kind of metal object that can prevent to enter the detector of the feed of crusher detection usefulness in the disintegrating machine.

The technical solution adopted in the utility model is: it comprises the search coil that is used to gather signal, multivibrator, differential check amplifier, the control relay that connects in turn.

When the utility model uses, the normally-closed contact of control relay should be connected with the belt transportation motor power-supply wire of disintegrating machine, search coil should be installed near the charging conveyer belt of disintegrating machine simultaneously.Like this; when in the building stones metal object being arranged, just can produce induced signal, by multivibrator and differential check amplifier to search coil; amplifying signal is transported to control relay; the belt conveyer power supply is cut off in the actuating of relay, makes the metal object in the building stones not be detected when entering disintegrating machine and dispose; so the metal object of having avoided effectively being mixed in the building stones enters disintegrating machine; thereby protected disintegrating machine, shortened the downtime of disintegrating machine troubleshooting barrier simultaneously, improved production efficiency.

Description of drawings:

Fig. 1 is a circuit block diagram of the present utility model.

Fig. 2 is the circuit diagram of an embodiment of the present utility model.

The specific embodiment:

As can be seen from Figure 1, circuit of the present utility model is formed by connecting in turn by search coil, multi-resmator, differential check amplifier, control relay.The normally-closed contact of control relay also ought be connected with the belt conveyer motor power of disintegrating machine during use, and search coil should be installed near the feed of crusher conveyer belt.Search coil is used for signals collecting; in building stones, there is metal object to sneak into; control coil can produce induced signal; metal object and search coil are near more; induced signal is strong more; this signal is sent to the Differential Detection amplification appliance by the pulse of multivibrator; control relay receives the signal after the amplification; produce action, cut off the belt conveyer power supply, make conveyer belt out of service; after metal object is excluded; resume operation, thereby stoped metal object to enter disintegrating machine, play the effect of effective protection disintegrating machine.

Fig. 2 shows the circuit diagram of a specific embodiment of the utility model.In this circuit, multivibrator has one with IC ₁, R ₁, R ₂, C ₂The single-shot trigger circuit of forming and one are with IC ₂, R ₄, C ₄The delay circuit of forming, delay circuit are the misoperations in order to prevent that interfering signal from producing.Ic chip ₁And IC ₂Be time base circuit 555, resistance R ₁And resistance R ₂Value is 47k Ω, capacitor C ₂Value is 100n, resistance R ₄Be 15k Ω, capacitor C ₄Be 10n.When in the building stones metal object being arranged, search coil sends signal, ic chip ₁2. pin be in electronegative potential, ic chip ₁Be triggered, the 3. pin output high level, this signal passes through capacitor C ₃Deliver to ic chip ₂2. pin, make ic chip ₂Be subjected to ic chip ₁Pulse-triggered, work as ic chip ₂3. pin output high level the time, pass through resistance R ₆, R ₇Trigger triode BG ₁, triode BG ₂, and make it conducting, amplify step by step by the Differential Detection amplifying circuit again.The Differential Detection amplifying circuit mainly is made up of two amplifier integrated package LM, and as LM324, search coil produces the metal induced signal, will be through electrochemical capacitor C ₁₁Be coupled to the amplifier integrated package (by A ₁-A ₄Composition) A of LM324 ₁3. pin of input, when 3. pin is received high level signal, because 2. its level is higher than pin, A ₁The output pin 1. will export high level, this signal is by adjustable resistance W ₁, electrochemical capacitor C ₁₃Deliver to integrated package LM324A ₂6. pin of input, after 6. pin is received signal, from output 7. pin output high level to A ₃9. pin of input, also deliver to A simultaneously ₄Input pin, A ₄Pin be output, output signal is by diode D ₂, resistance R ₁₄, resistance R ₁₆Deliver to another piece amplifier integrated package (by A ₅, A ₆Composition) A of LM324 ₅Input pin.While A ₃ Output 8. pin also pass through resistance R ₁₄, R ₁₆Be input to the A of amplifier integrated package ₅Input pin, A ₅The pin be output, signal is through resistance R ₂₄, diode D ₃Deliver to same integrated package A ₆Input 10. pin, 10. pin and resistance R ₂₃, capacitor C ₁₈Join A ₆9. pin insert resistance R ₂₂, R ₂₁, resistance R ₂₂Insert adjustable resistance W ₂, pass through resistance R ₁₉Ground connection.Adjustable resistance W ₂The other end inserts resistance R ₁₈The back is to positive source, A ₆8. pin be output, signal by this pin through resistance R ₂₀Deliver to triode BG ₃Base stage, make triode BG ₃Conducting, the relay J action disconnects the belt conveyer power supply thus, and belt conveyer is shut down, and the workman can get rid of metal object at this moment, has prevented that effectively metal object from falling into disintegrating machine.

Claims

1, a kind of feed of crusher detects the detector of usefulness, it is characterized in that: this detector comprises the search coil that is used to gather signal, multivibrator, differential check amplifier, the control relay that connects in turn.