CN202239554U

CN202239554U - Programmable logic control (PLC) system for centrifuge

Info

Publication number: CN202239554U
Application number: CN2011202361523U
Authority: CN
Inventors: 张广明
Original assignee: Yangzhou Wutingqiao Cylinder Casing Co Ltd
Current assignee: Yangzhou Wutingqiao Cylinder Casing Co Ltd
Priority date: 2011-07-06
Filing date: 2011-07-06
Publication date: 2012-05-30
Anticipated expiration: 2021-07-06

Abstract

The utility model relates to a programmable logic control (PLC) system for a centrifuge. The PLC system comprises a touch screen, an S7-226 module and frequency converters, which are connected in turn, and digital quantity input and output modules and analog quality input and output modules, which are connected with the S7-226 module; the analog quantity input modules are connected with a pressure transmitter and a flowmeter; the analog quantity output modules are connected with a regulating valve; and the digital quantity input and output modules are connected with a control switch of the centrifuge. The PLC system has the advantages that: a circuit structure is highly simplified, the system stability is improved, the work efficiency is improved, the service life is prolonged, the PLC system is more convenient to maintain, an output function is perfected, production cost is reduced and product quality is ensured.

Description

Centrifuge PLC controls system

Technical field

The utility model relates to a kind of centrifuge PLC and controls system.

Background technology

Traditional cylinder sleeve manufacturing enterprise adopts separate unit cantilevered centrifuge to produce cylinder sleeve, and production efficiency is low, unstable product quality, and labour intensity is big, and work under bad environment is typical labor-intensive production.Along with the development and progress of society, market requires the cost of cylinder sleeve further to reduce in increasingly high to the cylinder sleeve quality requirements.This is under the environment that raw material and labor cost are all going up, and traditional mode of production can not satisfy the requirement in market, and the traditional mode of production mode has seriously restricted the development of cylinder sleeve manufacturing enterprise.

The utility model content

The utility model provides a kind of centrifuge PLC to control system for solving the problems of the technologies described above.

The technical scheme that the utility model solves the problems of the technologies described above is following: a kind of centrifuge PLC controls system; It comprises touch-screen, PLC module and the frequency converter that connects successively; And the digital quantity input module that is connected with the PLC module respectively, digital quantity output module; And the analog quantity input module, said analog quantity input module is connected with pressure transmitter, flowmeter, and said digital quantity input module all is connected with the gauge tap of centrifuge with the digital quantity output module;

Said PLC module, the running of the unit head through the Frequency Converter Control centrifuge;

Said digital quantity input module is used to gather the switch state signal of Centrifugal Machine Control switch;

Said digital quantity output module exports the signal of digital quantity input module collection to frequency converter, thus the running status and the sequential of control centrifuge unit head, the perhaps state of the water valve of centrifuge, air valve or hydraulic valve;

Said analog quantity input module, molten iron temperature signal when being used to gather analog signal, mold temperature signal and the cast of pressure and the flow of cooling water.

Further, said digital quantity output module also is used to export the product technological parameter information that the PLC module is set, and said product technological parameter information comprises the temperature of pouring molten iron; The temperature of mould control; Cooling water flow how much, and the air cooling time, coating content requires and the requirement of blank rotary speed.

Further, said PLC module adopts the S7-200CN of Siemens Company series S7-226, comprises CPU module and I/O module.

Further, said digital quantity input module and digital quantity output module adopt the S7-200CN of Siemens Company series EM233 or the S7-200CN of Siemens Company series EM221.

Further, said analog quantity input module adopts the S7-200CN of Siemens Company series EM235.

The beneficial effect of the utility model is: the circuit structure height is simplified, and the stability of a system strengthens, and increases work efficiency, and increases the service life, and safeguards more conveniently, when improving output function, has reduced production cost, the assurance product quality.

Description of drawings

Fig. 1 is the utility model control block diagram;

Fig. 2 is the utility model EM233 circuit theory diagrams;

Fig. 3 is the utility model EM221 circuit theory diagrams;

Fig. 4 is the utility model EM235 circuit theory diagrams.

The specific embodiment

Below in conjunction with accompanying drawing the principle and the characteristic of the utility model are described, institute gives an actual example and only is used to explain the utility model, is not the scope that is used to limit the utility model.

As shown in Figure 1; A kind of centrifuge PLC controls system; It is characterized in that: it comprises successively touch-screen, PLC module and the frequency converter that connects, and the digital quantity input module that is connected with the PLC module respectively, digital quantity output module, and the analog quantity input module; Said analog quantity input module is connected with pressure transmitter, flowmeter, and said digital quantity input module is connected with the gauge tap of centrifuge with the digital quantity output module.

Said PLC module is through the running of Frequency Converter Control centrifuge unit head;

Said digital quantity output module; Export the signal of digital quantity input module collection to frequency converter; Thereby the running status and the sequential of control centrifuge unit head, the perhaps state of the water valve of centrifuge (going into water valve and outlet valve), air valve (intake valve and air outlet valve) or hydraulic valve (open and close or aperture size);

Said analog quantity input module is gathered analog signal, the mold temperature signal of the pressure of cooling water and flow and molten iron temperature signal when pouring into a mould.

When the analog signals of gathering is unusual (such as: cooling water pressure is excessive or too small etc.) the PLC module controls the aperture size of corresponding switch through digital quantity output module output output switching signal.

Said PLC module adopts the S7-200CN of Siemens Company series S7-226, comprises CPU module, communication interface modules, I/O module and power module.

Said digital quantity input module and digital quantity output module adopt the S7-200CN of Siemens Company series EM233 or the S7-200CN of Siemens Company series EM221; The S7-200CN cost performance is than higher; Present embodiment adopts 4 EM233 and 2 EM221 (requiring to decide according to output and input) simultaneously; Be used to gather the switching value signal of centrifuge station, thereby pass through the switching of the corresponding motor of S7-226 module controls.

As shown in Figure 4, said analog quantity input module adopts the S7-200CN of Siemens Company series EM235, is used to gather the hydraulic pressure of centrifuge, mould and molten iron temperature, and analog signalses such as cooling water flow are then through being transferred to the PLC module after the A/D conversion.

During work, to the CPU resume module, the data after the I/O module will be handled transfer to frequency converter through the digital quantity output module to the I/O module, thereby control corresponding machine operation with the transfer of data of gathering.

Can import corresponding analog value through touch-screen, thus the operation of control centrifuge.

The above is merely the preferred embodiment of the utility model, and is in order to restriction the utility model, not all within the spirit and principle of the utility model, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the utility model.

Claims

1. a centrifuge PLC controls system; It is characterized in that: it comprises the PLC module; The touch-screen and the frequency converter that are connected with said PLC module; And the digital quantity input module that is connected with the PLC module, digital quantity output module and analog quantity input module, said analog quantity input module also is connected with pressure transmitter, flowmeter, and said digital quantity input module all is connected with the gauge tap of centrifuge with the digital quantity output module;

2. centrifuge PLC according to claim 1 controls system, and it is characterized in that: said PLC module comprises CPU module and I/O module.

3. centrifuge PLC according to claim 1 and 2 controls system, it is characterized in that: said digital quantity input module and digital quantity output module adopt the S7-200CN of Siemens Company series EM233 or the S7-200CN of Siemens Company series EM221.

4. centrifuge PLC according to claim 1 and 2 controls system, it is characterized in that: said analog quantity input module adopts the S7-200CN of Siemens Company series EM235.