CN2089458U

CN2089458U - Anti-slip controller for belt conveyer

Info

Publication number: CN2089458U
Application number: CN 90209199
Authority: CN
Inventors: 骆汉平; 阎景平
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-06-18
Filing date: 1990-06-18
Publication date: 1991-11-27

Abstract

The monitor is used to prevent the conveying belt of a belt conveyor from slipping with a drive pulley. The utility model mainly comprises an active sensor, a driven sensor, a monitor, an alarm, etc. The output terminal of the utility model, coupled with the power switch of the belt conveyor, can send out alarming signal when the running belt conveyor occurs slippage and cut off the dynamic power supply of the conveyor. In addition, the sensor adopts a non-contact method and is provided with a spiral dust-proof structure to increase the reliability of the apparatus greatly.

Description

Anti-slip controller for belt conveyer

The utility model is that a kind of load-transfer device of belt conveyer and head roll generation mal of preventing skids, that is crosses the control setup that skids.

At present, the belt conveyer in the use, for want of desirable fender guard can't in time be found skidding accident, often because of the generation high temperature that skids that continues of head roll and load-transfer device, burnt out load-transfer device so that cause fire.This type of accident is in the mine down-hole or have the working space of imflammable gas to take place, and the danger that causes gas or coal-dust explosion is just arranged.

For overcoming the problems referred to above, the purpose of this utility model is to provide a kind of control monitor unit that prevents belt conveyer to cross to skid; The purpose of this utility model also is to provide a kind of system protection device of transport systems of many transport planes serial connections of being made up of belt conveyer.Monitor described in the utility model mainly is made up of active sensor, slave sensor, monitor and annunciator etc.After the conveyer work; driving and driven sensor is transported to the rotary speed information of the rotary speed information of head roll and belt roller respectively and carries out revolution ratio in the monitor relatively; when rotating speed ratio during greater than a certain preset value; monitor promptly sends accident signal and halt instruction to conveyer power supply shape; and send chimes of doom simultaneously, thereby controlled the further deterioration of crossing skidding accident timely and effectively.

In the transport systems of many transport plane serial connections of forming by belt conveyer; after this device is set; as long as wherein the skidding accident monitor took place and can send to accident signal to system's center console in a conveyer; and can cut off the total system power supply immediately; in case because of certain transport plane accidental shutdown; other conveyer continues the phenomenon of charging, thereby has reduced the work capacity of settlement of accident.

Electronic control circuit and principle of work thereof in this device, designer of the present utility model is in its design-calculated patent of invention " inclined shaft is with preventing coaster safety door open in usual " (patent No. 85105087.5, issue licence) and the product of " overspeed signal generating device for bogie (patent No. 85107454 is authorized) " in use.Therefore, this specification sheets only is described in detail mechanics of the present utility model.

Below be to brief description of drawings:

Fig. 1 belt conveyer is crossed the monitoring principle schematic of skidding

Fig. 2 slave sensor structure and scheme drawing is set.

Below in conjunction with accompanying drawing, the most preferred embodiment of physical construction of the present utility model is carried out more detailed narration:

This monitor is a body structure from the appearance, in the colliery and there is the imflammable gas place to make the explosion-resistant enclosure structure, its input termination active sensor (5), slave sensor (8), the source switch (1) and the annunciator of the defeated shutdown of its mouth tape splicing formula, input end connects active sensor and slave sensor respectively; Comprise OR circuit (2), revolution ratio relatively determining device (3) and annunciator (4) etc. in its casing.

The working process of revolution ratio comparison determining device is: the rotary speed information that driving and driven sensor is sent here (being that level changes number) carries out the speed counting respectively earlier, the revolution ratio that draws compares by a comparator and a preset value, during the conveyer normal operation, the revolution ratio of head roll (6) and last band carrying roller (9) is certain value substantially, and test the speed relatively find actual principal and subordinate's revolution ratio therewith the error of definite value surpass allowed band; Promptly surpass the preset value scope, then revolution ratio relatively determining device (3) can have ever made the judgement of skidding, the adhesive alarm circuit makes its warning, the overcurrent protection coil to conveyer source switch (1) in send electricity with cut-out conveyer electrical source of power simultaneously.

Annunciator generally replaces with transportation signal electric bell, adopts stick circuit, in case i.e. electric bell energising, just closed this circuit of its holding coil is shut down the back electric bell at conveyer and still reported to the police by the signal power source power supply.

Sensor is made by magneto sensor, active sensor (5) is installed in the wheel hub of head roll (6), and stud with a permanent magnet at wheel hub and on the week of the corresponding garden of active sensor, guarantee that permanent magnet cooperates with magneto sensor formation noncontact in the active sensor, array slave sensor (8) also is installed in all outer ends of going up band carrying roller (9) or guide pulley (7) with same method.

When (1) power supply that closes a switch, the belt conveyer and the monitor that skids are excessively all devoted oneself to work, head roll (6) drives load-transfer device (11) running, the motion of flexible load-transfer device drives carrying roller again, under be with carrying roller (10), guide pulley (7), commutation belt tensioning drum (12) rotates, and head roll whenever circles, permanent magnet on its wheel hub promptly to the induction of the magneto sensor in the active sensor (5) once, so just extract the rotary speed information of head roll, the array slave sensor also extracts driven rotary speed information with same principle, these information carry out the speed counting by monitor and revolution ratio compares, work as the master, from revolution ratio just often, monitor is not interfered the conveying normal operation; And master and slave revolution ratio error is in case when surpassing certain preset value, monitor sends the instruction that has a power failure (even protective circuit action in the switch) to switch (1) immediately; Cut off the conveyer power supply, send accident signal by annunciator (4) simultaneously.

Slave sensor installing array and will pass through a disjunction gate mechanism, its effect be same as in the digital circuit or.Reason is to consider the actual working environment factor, at work, as long as band idler pulley has one also rotating on several of installing slave sensor, disjunction gate (2) all guarantees driven rotary speed information is transported to determining device (3) thereby the interior reliability that improves whole device.

For solving the working space dirt problems, slave sensor and combining of last band carrying roller have been adopted the structure of Fig. 2, permanent magnet (13) is set in the end edge of band carrying roller (9), the magneto sensor of making slave sensor (8) is contained in carrying roller cover (14) bottom and carrying roller permanent magnet corresponding section, and carrying roller cover and support (15) are fixing; For preventing that dust from entering the sensor fitting surface, dress carrying roller end diameter is made greater than entrusting the driving surface diameter, and on the garden of carrying roller cover (14) and upper supporting roller (9) post rotation faying face, process directed non-matching thread, after the conveyer running, this screw thread guarantees dust is squeezed outside jacket all the time, has further strengthened the reliability of sensor.

In the multimachine serial connection transport systems of forming by belt conveyer, the monitor mouth that only mistake of every conveyer need be skidded is switched to center console, at any time show each transport plane service condition, in case skidding accident appearred in certain conveyer, cut off whole transport systems power supply, so that the processing of accident.

Claims

1, a kind ofly is used to prevent the load-transfer device of belt conveyer and the monitor that head roll took place to skid, it is characterized in that the permanent magnet mutual action that is set in head roll (6) wheel hub by a magneto sensor and that serves as active sensor extracts initiatively rotary speed information of conveyer; Extract the driven rotary speed information of conveyer respectively with the permanent magnet mutual action of going up band carrying roller (9) end separately accordingly by several magneto sensors that serve as slave sensor.

2, monitor as claimed in claim 1, what it is characterized in that installing permanent magnet (13) goes up band carrying roller (9) end and carrying roller (14) place of matching diameter greater than entrusting place's diameter.

3, monitor as claimed in claim 2 is characterized in that being shaped on directed dustproof helical on band carrying roller (9) and the cylinder faying face of carrying roller cover (14).