Local control method of bag filter and used power distribution control cabinet
A bag dust collector and control method technology, applied to chemical instruments and methods, separation methods, and dispersed particle separation, etc., can solve the problems of many input and output port resources, many cables, and inconvenient operation, and achieve the goal of input and output port resources Less, scientific network structure, clear and simple lines
Active Publication Date: 2012-12-26
GUIYANG AL-MG DESIGN & RES INST
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Problems solved by technology
There are often multiple scattered bag dust collectors in a workshop. When each bag dust collector is controlled by a main logic controller PLC in the workshop, there are the following disadvantages. The independence of each bag dust collector is not good. It is inconvenient to operate; there are many cables leading from the low-voltage power distribution room, occupying many outlet circuits of the power distribution panel in the low-voltage power distribution room, occupying a lot of input and output port resources of the main logic controller PLC, and each electrical device needs to be equipped with a motor on site control box
Method used
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Embodiment Construction
[0016] Embodiment of the present invention: the local control method of the bag dust collector of the present invention is as figure 1 shown. It uses the logic relay 52 to control the blower fan 61, the ash conveying motor 62, the ash unloading motor 63 and the pulse valve in the bag filter; The contactors 31-33 are connected to the auxiliary contacts of the thermal relays 41-43; the control output terminals of the logic relay 52 are respectively connected to the coils of the contactors 31-33, and the fan 61 and the ash conveying motor 62 are connected respectively through the contactors 31-33. , Ash unloading motor 63 for control; the pulse valve control end of logic relay 52 is connected with each pulse valve respectively. -L in the figure is the output bus, +L is the input bus, and the arrow indicates the communication cable connected with the logic controller PLC in the central control room.
[0017] The wiring of the logic relay is as figure 2 As shown, the signal inp...
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The invention discloses a local control method for a cloth screen and a power distribution control cabinet used by the same. The method comprises: a logic relay is adopted to control a fan, an ash transportation motor, an ash discharge motor and pulse valves which are arranged in the cloth screen; the signal input end of the logic relay is connected with an automatic switch, a contactor and an auxiliary contact of a thermal relay which are arranged in a main circuit respectively; the control output end is connected with the coils of the contactor respectively and controls the fan, the ash transportation motor and the ash discharge motor through the contactor respectively; and the pulse vale control end of the logic relay is connected with the pulse valves respectively. The cloth screen can be controlled independently and locally, so that power-off operation or startup test can be carried out freely during overhauling; less outgoing line circuit of a distribution board of a low-voltage power distribution board is occupied, the configuration of a local control box for each motor is not required, fewer input and output interface resources of a primary logic controller PLC are used, the power distribution control circuit is clear and simple, and decentralized control is adopted and makes a network structure more scientific.
Description
technical field [0001] The invention relates to an on-site control method of a bag dust collector and a used power distribution control cabinet, belonging to the technical field of electric control. Background technique [0002] A typical bag filter in an electrolytic aluminum plant usually includes the following four electrical equipment: fan, ash conveying motor, ash unloading motor, and a pulse instrument for controlling the blowback valve. At present, when the logic controller PLC is used for control, the above four electrical equipments are usually controlled as four motors respectively. Such a control method requires three input points and one output point to control each motor. Then, for a bag filter, at least twelve input points and four output points are required to control, and the complex dust collector also has a control of the pressure difference between the inlet and outlet of the dust bag (the inlet and outlet of the dust collector are respectively There is ...
Claims
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IPC IPC(8): B01D46/46B01D46/02C25C3/22
Inventor 谢松泉宦述晓
Owner GUIYANG AL-MG DESIGN & RES INST