CN201415073Y

CN201415073Y - Constant water level filtering control device for filter grids of filter tank

Info

Publication number: CN201415073Y
Application number: CN2009200706758U
Authority: CN
Inventors: 张生
Original assignee: Shanghai Shenxa Computer Science & Technology Co Ltd
Current assignee: Shanghai Shenxa Computer Science & Technology Co Ltd
Priority date: 2009-04-17
Filing date: 2009-04-17
Publication date: 2010-03-03
Anticipated expiration: 2019-04-17

Abstract

The utility model relates to a constant water level filtering control device for filter grids of a filter tank, which comprises filter grids, a liquid level sensor, a water inlet channel, a valve mounted on the water inlet channel, a water outlet channel, a solenoid valve mounted on the water outlet channel and a control device. The control device consists of a computer chip CPU LMS301, an integrated component 74HC595, a liquid crystal screen TC1062, a keyboard KEY1-KEY5, a digital-analog conversion integrated chip DAC0832 and a communication module IPort. A liquid level converter transmits acquisition data to the computer chip CPU; and the user program of the computer chip transmits a control signal to the solenoid valve on the outlet channel. The filter grid of each filter tank is provided with an independent control system and really can carry out constant water level filtration; and meanwhile, all controllers are connected by a communication link, so that the filter grids are coordinated each other, thereby achieving the fully-automatic operation of an entire filter system. The control system has convenient and simple operation and maintenance and is connected with an industrial Ethernet so as to comfort to future development trend.

Description

Filter tank filter grid constant water level filtering control device

Technical field

The utility model relates to a kind of filter tank water treatment facilities, relates in particular to a kind of filter tank filter grid constant water level filtering control device.

Background technology

The filter tank is an important step in water factory's process treatment process.Filtration is meant with suspended impurity in the filter material layer trap water, makes water obtain the process that purifies.Usually the filter tank is divided into several filter grids, these do not have to press uncovered on water inlet, go out the filter grid of water running in running down, because of multiple reason can cause the into imbalance between the water and water outlet, can cause water level reduction in the filter grid of filter tank, make the filter material layer dehydration expose to the open air, make that effluent characteristics can not stably reaching standard.Constitute FC filter tank control system and adopt PLC to add the OP plate mostly to the water level control of this class filter tank filter grid at present, add a plurality of equipment that the OP plate is controlled a plurality of filter tanks filter grid by a PLC, to cause the whole system paralysis in case the somewhere is out of order, have to adopt the method for manual control.Complete equipment is reliability existing problems not only, and the cost height, when safeguarding the technical staff are required height, can not satisfy the needs that reality is produced.

The utility model content

The purpose of this utility model provides a kind of that can independently control, that reliability is high, easy filter tank filter grid constant water level filtering control device of maintenance.

The utility model is by the following technical programs in to realize: a kind of filter tank filter grid constant water level filtering control device, include filter grid, liquid level sensor, inlet channel and valve mounted thereto, go out water channel and magnetic valve mounted thereto, it is characterized in that: its control device is made up of microcomputer chip CPU LMS301, integrated component 74HC595, liquid crystal display TC1062, keyboard KEY1～KEY5, digital-to-analogue conversion integrated chip DAC0832, communication module IPort; Described microcomputer chip CPU connects liquid crystal display TC1062 input interface by its SSI mouth through integrated component 74HC595, keyboard KEY1～KEY5 connects PD0～PD4 interface of microcomputer chip CPU, the liquid level converter output end connects the ADC0 input interface of microcomputer chip CPU through the I/V conversion, the I/O interface PB0 of microcomputer chip CPU～PB7 output meets digital-to-analogue conversion integrated chip DAC0832 and connects the magnetic valve that is installed in out on the water channel through the V/I conversion, and the interface RS232 of communication module IPort links to each other with the URAT interface of microcomputer chip CPU.

Good effect of the present utility model is: the filter tank filter grid constant water level filtering control device that the utility model proposes, the filter grid in each filter tank has an independently cover control system, avoid a plurality of filter grids by interfering with each other that a PLC control causes, each filter grid is really accomplished constant water level filtering, all controllers connect by communication link simultaneously, each filter grid is coordinated mutually, thereby realized the full-automation operation of whole filter tank system.Owing to taked independently control mode, as break down and only need more that exchange device gets final product, the easy later period maintenance work of maintenance from the member.Native system operation, safeguard simple and conveniently, and field control system access industrial Ethernet is met the end come development trend.

Description of drawings

Fig. 1 is the utility model system architecture schematic diagram.

Fig. 2 is Fig. 1 embodiment control device theory structure block diagram.

The specific embodiment

The invention will be further described below in conjunction with embodiment: Fig. 1～Fig. 2 is the utility model system and control principle figure.A kind of filter tank filter grid constant water level filtering control device includes: filter grid 1, liquid level sensor 2, inlet channel 3. and valve 4 mounted thereto, go out water channel 5 and magnetic valve 6 mounted thereto.Its control device by: microcomputer chip CPU LMS301, integrated component 74HC595, liquid crystal display TC1062, keyboard KEY1～KEY5, digital-to-analogue conversion integrated chip DAC0832, communication module IPort form.Described microcomputer chip CPU connects liquid crystal display TC1062 input interface by its SSI mouth through integrated component 74HC595, keyboard KEY1～KEY5 connects PD0～PD4 interface of microcomputer chip CPU, the liquid level converter output end connects the ADC0 input interface of microcomputer chip CPU through the I/V conversion, the I/O interface PB0 of microcomputer chip CPU～PB7 output meets digital-to-analogue conversion integrated chip DAC0832 and connects the magnetic valve that is installed in out on the water channel through the V/I conversion, and the interface RS232 of communication module IPort links to each other with the URAT interface of microcomputer chip CPU.Wherein:

The little process chip CPU of system's control core adopts embedded-type ARM chip LMS301, and system itself carries small-sized LCDs and keyboard, is used for on-the-spot water level parameter demonstration and setting.Liquid crystal display TC1062 is 16 characters of standard, the liquid crystal display module of 2 row, and microcomputer chip CPU sends the character data serial by its SSI mouth, and 74HC595 reverts to parallel data through integrated component, inputs to the interface of liquid crystal display TC1062; The data input DB0-DB7 of the corresponding liquid crystal display TC1062 of the output QA-QH of integrated component 74HC595, control bit is directly provided control bit RS, R/W, the E of corresponding TC1062 by PC4, PC5, PC6.Described keyboard has 5, and wherein: KEY1 is used for carrying out the menu item selection and switches; KEY2 with for carry out cursor move and numerical value during data setting is revised, when switching to setting value, during by this key, from default value 0, whenever by a numerical value increase by 1.When in like manner pressing KEY3, from default value 9, numerical value of every button subtracts 1.The KEY4 key is determined the keyboard input, the input of KEY5 key cancellation keyboard, and above-mentioned 5 keys meet PD0～PD4 of microcomputer chip CPU successively.

The liquid level converter adopts ultrasonic level gage in the present embodiment, and the current analog amount 0～2mA of its gained imports little process chip CPU through the magnitude of voltage that I/V converts 0～5V to through ADC0.User program is solidificated in little process chip CPU, user program is designed to permanent water level constant rate filtration with it, set the working water level in filter tank according to operating experience, detect the filter tank water level according to ultrasonic level gage, itself and the deviation and the variation tendency that set value, PID adjusts the open degree of electromagnetic valve, its signal is through digital-to-analogue conversion integrated chip DAC0832, connect the magnetic valve that is installed in out on the water channel after V/I conversion, aperture by the electromagnetic valve by-pass valve control, by making the filter tank water level maintain in certain range of set value the fluctuation operation, thereby reach the purpose of automatic control water level.

The communication module IPort that the utility model adopts is a serial ports---the Ethernet modular converter, its interface is that RS232 directly links to each other with the URAT interface of microcomputer chip CPU, microcomputer chip CPU immediate data sends to IPort by TX during transmission, directly is sent to Ethernet after IPort receives; During reception, the data that microcomputer chip CPU directly receives the FIFO buffer area promptly send with reception and need not handshake.Because native system itself is a node in the Ethernet, has the EPA interface, system can be inserted internet, on-the-spot real-time working conditions such as water level, flow are sent on the far-end PC monitoring software interface or the Web page, this way is beneficial to each filter grid and coordinates mutually, thereby realizes the fully automatic operation of whole filter tank system.Native system is operated, safeguards simple and convenient, has very strong function expansibility, is that development trend is come at the end with field control system access industrial Ethernet, and native system meets this requirement.

Above-mentioned example does not constitute restriction of the present utility model, and all employings are equal to the technical scheme that form obtained of replacement or equivalent transformation, all drop within the protection domain of the present utility model.

Claims

1. filter tank filter grid constant water level filtering control device, include filter grid, liquid level sensor, inlet channel and valve mounted thereto, go out water channel and magnetic valve mounted thereto, it is characterized in that: its control device is made up of microcomputer chip CPU LMS301, integrated component 74HC595, liquid crystal display TC1062, keyboard KEY1～KEY5, digital-to-analogue conversion integrated chip DAC0832, communication module IPort; Described microcomputer chip CPU connects liquid crystal display TC1062 input interface by its SSI mouth through integrated component 74HC595, keyboard KEY1～KEY5 connects PD0～PD4 interface of microcomputer chip CPU, the liquid level converter output end connects the ADC0 input interface of microcomputer chip CPU through the I/V conversion, the I/O interface PB0 of microcomputer chip CPU～PB7 output meets digital-to-analogue conversion integrated chip DAC0832 and connects the magnetic valve that is installed in out on the water channel through the V/I conversion, and the interface RS232 of communication module IPort links to each other with the URAT interface of microcomputer chip CPU.