CN203625499U

CN203625499U - Cell voltage collecting device of aluminum electrolysis cell controller

Info

Publication number: CN203625499U
Application number: CN201320817812.6U
Authority: CN
Inventors: 杨叶伟; 熊自勇; 师彦东; 周朝元
Original assignee: Yunnan Yunlv Ruixin Aluminum Co Ltd
Current assignee: Yunnan Yunlv Ruixin Aluminum Co Ltd
Priority date: 2013-12-13
Filing date: 2013-12-13
Publication date: 2014-06-04
Anticipated expiration: 2023-12-13

Abstract

The utility model discloses a cell voltage collecting device of an aluminum electrolysis cell controller. The cell voltage collecting device comprises a voltage to frequency converter (VFC) module (1) and a central processing unit (CPU) module (2), wherein the VFC module (1) is connected with the CPU module (2) via a signal, and electrically connected with an isolation power supply module (3); an open circuit is formed between power interfaces of the VFC module (1) and the CPU module (2). By adopting the cell voltage collecting device, work power supply of the VFC module is independent, and external power supply is changed into internal work power supply, so that interference of the current collecting module and the VFC module is avoided, and meanwhile, connection of the power supply Vcc of voltage collecting channels in the VFC module and the CPU module is cut off. Thus, the VFC module and the CPU module respectively have internal work power supply, the problem that the VFC module encounters a lightning stroke when the external power supply is adopted, resulting in damage to the CPU module is solved, and the cell voltage collecting device is more reliable in operation.

Description

A kind of groove of aluminium electrolytic tank control machine is pressed gathering device

Technical field

The utility model belongs to automatic control technology field, is specifically related to a kind of groove simple in structure, large-scale pre-baked aluminum electrolysis cell slot control machine that immunity from interference is strong, safe and reliable to operation and presses gathering device.

Background technology

Large-scale pre-baked aluminum electrolysis cell application " Aluminium Electrolysis computer control system " in aluminium industry; its major way is to adopt " electrolysis local area network-monitoring management level-field control level " three grades of distributed frames; in the lower computer (slot control machine) of " field control level " be undertaking electrolyzer produce in the function such as crust-breaking & baiting, anode lifting, system power and bath voltage collection, data corresponding, safeguard protection, wherein most important for realizing the control that CPU module that bath voltage gathers produces electrolyzer.

The major control that " Aluminium Electrolysis computer control system " is positioned at the lower computer (slot control machine) of " field control level " comes from its logic unit---CPU module, its major function is by the volts DS directly obtaining from electrolyzer bus is converted to pulse, and the mode of acquisition pulse frequency is carried out the bath voltage real-time sampling of electrolyzer, sample range is 0-100VDC, and bath voltage isolation is reliable, measuring accuracy is high, immunity from interference is strong.

Although this CPU module has so high measuring accuracy and powerful immunity from interference, in practical application, find to exist the critical defect can not be ignored:

1, current acquisition passage and voltage acquisition passage (VFC module) share insulating power supply circuit, cause phase mutual interference, while occurring in application that voltage fluctuation is very large, and the situation that electric current fluctuates widely.

2, voltage acquisition passage (VFC module) adopts the mode of external power source, although slot control machine has input and output buffer circuit, but in the time of thundery sky, meet with the situation of thunderbolt, powerful discharging current still can puncture buffer circuit, arrive CPU module through external power source loop, thereby the whole logical circuit of thoroughly breaking causes shutdown, more serious cause whole Controlling System communication disruption, except a large amount of spare part of loss, cause the very big labor capacity of electrolysis personnel simultaneously, the financial loss causing is difficult to estimation, lightning strike accident happens occasionally in electrolysis of aluminum industry, therefore solve this significant problem value and significance great.

Utility model content

The purpose of this utility model is to provide a kind of groove simple in structure, large-scale pre-baked aluminum electrolysis cell slot control machine that immunity from interference is strong, safe and reliable to operation to press gathering device.

The purpose of this utility model is achieved in that and comprises VFC module, CPU module, and described VFC module is connected with CPU module by signal, and described VFC module and insulating power supply module are electrically connected, and between the power interface of described VFC module and CPU module, open a way.

The utility model passes through independent the working power of VFC module, become internal work power supply from external power source, cut off VFC module is connected with the power supply in CPU module simultaneously, thereby reach the each own own inner working power of VFC module and CPU module, solve when VFC module adopts external power source and met with and be struck by lightning and the problem of damage CPU module, moved more reliable.

Accompanying drawing explanation

Fig. 1 is functional block diagram of the present utility model;

Fig. 2 is VFC module logical diagram of the present utility model;

Fig. 3 is that logic of the present utility model connects block diagram;

In figure: 1-VFC module, 2-CPU module, 3-insulating power supply module, 4-current acquisition module, 5-insulating power supply module, the power Vcc interface of 6-DC-DC insulating power supply module, 7-CPU module voltage acquisition channel, 8-VFC modular power source interface.

Embodiment

The utility model is described in further detail below, but never in any form the utility model is limited, and any conversion of doing based on the utility model training centre, all falls into the utility model protection domain.

As shown in Figure 1, the utility model comprises VFC module 1, CPU module 2, and described VFC module 1 is connected with CPU module 2 signals, and described VFC module 1 is electrically connected with insulating power supply module 3, between the power interface of described VFC module 1 and CPU module 2, opens a way.

The utility model also comprises current acquisition module 4, and described current acquisition module 4 is electrically connected with insulating power supply module 5, described insulating power supply module 3 and the separate work of insulating power supply module 5.

Described insulating power supply module 3 and/or insulating power supply module 5 are DC-DC insulating power supply module.

In described VFC module 1 and CPU module 2, between the power Vcc interface of voltage acquisition passage, open a way.

The utility model principle of work and working process:

The utility model passes through independent the working power of VFC module, become internal work power supply from external power source, cut off VFC module is connected with the power supply in CPU module simultaneously, thereby reach the each own own inner working power of VFC module and CPU module, solve when VFC module adopts external power source and met with and be struck by lightning and the problem of damage CPU module, moved more reliable.In addition, adopt VFC module and not homology of current acquisition module working power, thereby avoid current acquisition module and the mutual interference of VFC module phase, improved overall immunity from interference, strengthened the precision and the reliability that detect data; Open circuit scheme between the further power Vcc interface that adopts voltage acquisition passage in VFC module and CPU module, system anti-lightning and interference free performance are better, have improved the operating safety factor of system; The insulating power supply module that current acquisition module is connected with VFC module adopts DC-DC insulating power supply module, has solved the disadvantage that relies on external power source, has effectively avoided the generation of thunderbolt, and more safe and reliable.

Select respectively the reliable MORNSUN F0505S-1W of high-quality DC-DC insulating power supply module, as the working power as VFC module 1 and/or current acquisition module 4; In CPU board, install independently F0505S-1W DC-DC insulating power supply module simultaneously additional, and cut off the power Vcc interface of voltage acquisition passage in VFC module 1 and CPU module 2, CPU module 2 does not just need VFC module 1 that power supply is provided, avoid thundery sky thunder-strike current to scurry into CPU board and burn CPU module 2 from VFC module 1, improved the safety coefficient of system; VFC module 1 is connected with different internal insulation power supplys respectively from current acquisition module 4, has avoided phase mutual interference to cause measuring accuracy to reduce and reliability.When work, the volts DS obtaining from electrolyzer bus is converted to pulse input CPU module 2 through VFC module 1, and carries out the bath voltage real-time sampling of electrolyzer through the mode of acquisition pulse frequency, thereby reaches the production of controlling accurately, reliably electrolyzer.

Claims

1. the groove of an aluminium electrolytic tank control machine is pressed gathering device, comprise VFC module (1), CPU module (2), described VFC module (1) is connected with CPU module (2) signal, it is characterized in that described VFC module (1) and insulating power supply module (3) are electrically connected, and open a way between the power interface of described VFC module (1) and CPU module (2).

2. groove according to claim 1 is pressed gathering device, characterized by further comprising current acquisition module (4), described current acquisition module (4) is electrically connected with insulating power supply module (5), described insulating power supply module (3) and the separate work of insulating power supply module (5).

3. groove according to claim 2 is pressed gathering device, it is characterized in that described insulating power supply module (3) and/or insulating power supply module (5) are DC-DC insulating power supply module.

4. groove according to claim 1 is pressed gathering device, it is characterized in that opening a way between the power Vcc interface of the middle voltage acquisition passage of described VFC module (1) and CPU module (2).