Machinery scarfing cinder grid maker is crossed moment early warning guard method and device
Technical field
The present invention relates to a kind of early warning guard method and the device of scarfing cinder grid maker when operational process moment is excessive that is used for WWT, belong to the scarfing cinder grid maker technical field in the WWT.
Background technology
In sewage treatment industry; Commonly used to grid (processing) by one group of parallel metal grizzly bar or screen cloth; Be installed in the water inlet of foul drainage, pump house pump well or the end of sewage work, in order to suspended substance or the swimmer of holding back increasing, like fiber, onal, hair, wood chip, pericarp, vegetables, plastics etc.; So that alleviate the processing load of subsequent disposal structures, and make it normal operation.The material that is trapped is called the grid slag, need clear up these grid slags, and according to the scarfing cinder mode, grid can be divided into artificial scarfing cinder grid and mechanical scarfing cinder grid maker again.Be to improve work and sanitary condition, when the grid quantity of slag is big (greater than 0.2m
3/ day), often adopting mechanical scarfing cinder grid maker, mechanical scarfing cinder grid maker commonly used at present has rotary type, back rake type, rotary drum etc.Which kind of mode no matter, its structure all are that motor passes through transmission rig and drives transmission shaft and rotate, and transmission shaft drives conveyor chain or conveying belt operation again, with foreign material by elevating in the sewage.
Because suspended substance or swimmer in the sewage are not of uniform size; Especially in the municipal wastewater, often contain more paper scrap, plastics bag, branch etc., cause in above-mentioned mechanical scarfing cinder grid maker operational process; It is excessive resistance often to occur; The excessive causes motor of current of electric shuts down even situation such as burns, and has reduced the work-ing life of motor, and has been difficult to effectively supervise.Solution for the problems referred to above; Mainly depend on transformation, precision sizing and the increase overcurrent protection device etc. of manufacturer to local parts such as bearings; The producer that also has self is provided with the mechanical overload safety guard at mechanical scarfing cinder grid maker, and when device fails, shear pin is cut off; Can avoid the equipment overwork, the damage equipment parts.But these methods are to be prerequisite to improve manufacturing cost or damage equipment, all can not fundamentally carry out early warning and protection to the mistake moment phenomenon of equipment.
Chinese patent CN03205256.1 discloses a kind of " WWT grid automatic control device "; This device comprises a float chamber that float is arranged; Float top in the float chamber is provided with power switch K1, is provided with time relay sj in the voltage circuit of this power switch K1, is parallel with intermediate relay ZJ with time relay sj; A normally closed contact SJK of time relay sj connects with intermediate relay ZJ, and a normal opened contact ZJK of intermediate relay ZJ is parallelly connected with above-mentioned power switch K1.Compared with prior art, this device can start or closes the grid drive-motor according to the adherent suspended substance situation of grid automatically, reduces running cost.But this device can only start or close the grid drive motors automatically based on the height situation of suspension, can not carry out early warning and protection to the mistake moment phenomenon of equipment equally.
Summary of the invention
The present invention is directed to and cross the deficiency that the moment resist technology exists in the existing machinery scarfing cinder grid maker operational process; A kind of level of automation height is provided, can effectively protects the mechanical scarfing cinder grid maker of equipment to cross moment early warning guard method, provide a kind of mechanical scarfing cinder grid maker of this method of can realizing to cross the moment early warning protector simultaneously.
Mechanical scarfing cinder grid maker of the present invention is crossed moment early warning guard method, is:
Mounting torque transmitter, data processing unit and wireless launcher on the transmission shaft of mechanical scarfing cinder grid maker make torque sensor be connected with data processing unit, and data processing unit is connected with wireless launcher; Torque sensor detects transmission shaft suffered moment data of when operation in real time, after handling through data processing unit, is constantly sent by wireless launcher; Receive the signal that wireless launcher sends through radio receiver; The line data of going forward side by side is handled; Radio receiver is connected with a PLC programmable logic controller, and gives this PLC programmable logic controller with data transmission, and the start-up circuit of mechanical scarfing cinder grid maker also is connected with this PLC programmable logic controller; After the PLC programmable logic controller receives data; With the suffered torque analysis of the transmission shaft of setting under data in real time and the mechanical scarfing cinder grid maker normal operating condition relatively; When the suffered moment of detected transmission shaft reaches or surpass the suffered moment of setting under the mechanical scarfing cinder grid maker normal operating condition of transmission shaft; PLC Controlled by Programmable Controller machinery scarfing cinder grid maker is out of service automatically, and sends guard signal immediately, and the prompting staff checks the scene; Handle, thereby reach the purpose of the mechanical scarfing cinder grid maker of effective protection.
The mechanical scarfing cinder grid maker of realization aforesaid method is crossed the moment early warning protector and is adopted following technical solution:
This prior-warning device; Comprise torque sensor, data processing unit, wireless launcher, radio receiver and PLC programmable logic controller; Torque sensor is connected with data processing unit; Data processing unit is connected with wireless launcher, and radio receiver is connected with wireless mode with wireless launcher, and radio receiver is connected with the PLC programmable logic controller.
When said apparatus is used; Torque sensor, data processing unit and wireless launcher are arranged on the position that does not influence its rotation on the transmission shaft of mechanical scarfing cinder grid maker; Can rotate with transmission shaft, the start-up circuit of controlling mechanical scarfing cinder grid maker operation simultaneously also is connected with the PLC programmable logic controller.When mechanical scarfing cinder grid maker running work; Torque sensor detects the transmission shaft moment in when operation in real time, and sends to data processing unit and carry out data processing, sends to radio receiver through wireless launcher then; Radio receiver is imported the PLC programmable logic controller with data; After the PLC programmable logic controller receives data, analyze automatically, when mechanical scarfing cinder grid maker transmission shaft moment reaches or surpass the suffered moment of setting under the mechanical scarfing cinder grid maker normal operating condition of transmission shaft; PLC Controlled by Programmable Controller machinery scarfing cinder grid maker is out of service, and sends guard signal immediately.
The present invention can realize that mechanical scarfing cinder grid maker transmission shaft transmits the online detection of moment of torsion; And with wireless mode emission with accept receipt; The equipment that do not influence normally moves, and can carry out failure prediction and warning according to the transmission shaft moment variations, and arrestment operation automatically; Protected equipment, made the equipment operating safety with reliable.
Description of drawings
Fig. 1 is the structural principle synoptic diagram that mechanical scarfing cinder grid maker is crossed the moment early warning protector among the present invention.
Wherein: 1, torque sensor, 2, data processing unit, 3, wireless launcher, 4, radio receiver, 5, the PLC programmable logic controller, 6, mechanical scarfing cinder grid maker.
Embodiment
As shown in Figure 1; Mechanical scarfing cinder grid maker of the present invention is crossed the moment early warning protector; Comprise torque sensor 1, data processing unit 2, wireless launcher 3, radio receiver 4 and PLC programmable logic controller 5; Torque sensor 1, data trap 2 and wireless launcher 3 are arranged on the main driving axle position of mechanical scarfing cinder grid maker, can rotate with main driving axle.Torque sensor 1 is connected with data processing unit 2, and data processing unit 2 is connected with wireless launcher 3.Radio receiver 4 is connected with PLC programmable logic controller 5, and radio receiver 4 and wireless launcher 3 are connected with wireless mode.Each parts is existing common technology.Torque sensor 1, data processing unit 2 and wireless launcher 3 are installed on the transmission shaft of mechanical scarfing cinder grid maker 6, and are positioned at the position that does not influence the transmission shaft rotation.
The process that said apparatus is crossed the moment early warning to mechanical scarfing cinder grid maker is described below:
The start-up circuit of mechanical scarfing cinder grid maker 6 is connected with PLC programmable logic controller 5; The suffered moment numerical value of transmission shaft when in the program of PLC programmable logic controller 5, setting mechanical scarfing cinder grid maker 6 normal operating conditions; The limit setting that this moment numerical value can bear to be no more than mechanical scarfing cinder grid maker 6 can be set according to experiment or experience.
Before 6 operations of machinery scarfing cinder grid maker, open power supply (can adopt the heavy-duty battery) switch of data processing unit 2 and wireless launcher 3, start mechanical scarfing cinder grid maker 6 then like lithium cell.Suffered torque signals when torque sensor 1 detects the transmission shaft operation in real time, and send this signal to data processing unit 2.Data processing unit 2 constantly sends torque sensor 1 detected feeble signal processing and amplifying by wireless launcher 3 then.Receive the signal that wireless launcher 3 sends through radio receiver 4, the line data of going forward side by side is handled, and radio receiver 4 is given this PLC programmable logic controller 5 with data transmission.After PLC programmable logic controller 5 receives data; With the suffered torque ratio of setting under data in real time and mechanical scarfing cinder grid maker 6 normal operating conditions of transmission shaft; Reach or surpass the suffered moment of transmission shaft of setting under the mechanical scarfing cinder grid maker normal operating condition when the suffered moment of detected transmission shaft; The mechanical scarfing cinder grid maker of PLC programmable logic controller 5 controls is out of service automatically, and sends guard signal immediately, and the prompting staff checks the scene; Handle, thereby reach the purpose of the mechanical scarfing cinder grid maker of effective protection.