1.1 High reliability and accuracy.
It can be said that so far, no industrial control equipment can achieve PLC reliability.
1.2 Convenient programming, simple operation PLC uses a ladder diagram that is very close to the actual wiring, easy to understand and easy to edit; no matter the wiring, configuration is simple.
1.3 Environmental Requirements Low PLC anti-dust, impact resistance, anti-jamming, suitable for harsh industrial environments.
2. Application of PLC Technology 2.1 Application of PLC in Belt Conveying Control System The coal belt conveyor system generally includes a plurality of conveyor belt conveyors, a tape conveyor, a picking belt conveyor, a scraper, and a coal storage system.
Shandong Zhongli Electric Appliance Co., Ltd. adopts the new product S7-1200 PLC developed by Siemens in recent years as its core. The “KXJ127 Mine Flameproof and Intrinsically Safe Display Control Box†is applied to the centralized monitoring system of all-tape belt conveyors to achieve chain control and stand-alone control. Various control modes can be used by the operator for flexible selection according to the actual situation on the site to ensure that the system operates flexibly and is easy to maintain when the system is in normal operation. In the event of system failure or communication interruption, on-site control can be performed to ensure the normal operation of the belt device and the system is improved. Stability. In addition, based on the KXJ127 control box belt conveyor centralized control system can achieve protection against slip, deviation, tearing, temperature, coal, smoke, emergency stop and other protection functions, so that when the belt conveyor failure, the system can quickly respond .
2.2 PLC in the mine drainage system Mine water inflow from the underground drainage system to the ground, whether it can be effective and reliable operation, related to the safety of the entire mine. China's mine drainage generally uses manual operation. There are many problems such as large labor intensity, long start-up and shutdown times, and low efficiency that are not suitable for modern mine management.
In this regard, Shandong China Coal Electric Co., Ltd. uses Siemens PLC as the core, according to the actual situation of underground coal mines, in the original facilities on the basis of automated transformation, developed so that the equipment in the case of unattended automatic operation and self-diagnosis A set of systems. Through the decision-making control of industrial computers, the equipment's operating status and process are automatically detected and automatically controlled to achieve a good working status of the equipment so as to effectively save energy, reduce labor intensity, reduce operating costs, and prolong equipment life.
The system uses the company's "KXJ660 mine flameproof and intrinsically safe programmable control box", "KXJ127 mine flameproof and intrinsically safe display control box", as well as the collection of sensors and actuators. The system has four working modes: "automatic", "manual", "overhaul" and "remote".
When “Automaticâ€, the level sensor continuously monitors the water level of the bunker. According to the water level of the bunker and the water absorption well, the water pump and its valve are automatically opened and stopped, and the quantity of the input water pump is determined according to the level of the water level; when “manual†the operator displays according to the Water level, manually open and stop the pump. The opening and stopping of the motor and its valve are automatically performed by the PLC; when the “overhaul†is performed, the maintenance personnel can operate the switch of any pump motor, electric gate valve, and solenoid valve with the operation button to release the interlocking relationship. When “Remote†is selected, the “Remote Control†interface is selected by the ground monitoring center. In this state, “manual†and “automatic†state control can be performed.
3. Conclusion Mine production includes mining, excavation, transportation, ventilation, safety, drainage, power supply, washing and other links. In these links, various monitoring and monitoring systems are complex and varied. Each product can be used in the same system through the conversion of Ethernet and protocols, and together form an automatic centralized control system. This application of centralized control technology will promote China's coal industry to a higher level.
Technical Department
Automatic Sliding X-ray hospital Door
hospital door, hospital sliding door, medical sliding door , automatic medical airtigh door, clean room door ,operating theaters door
Hospital door
Medical sliding door , each door has a single whole steel plate , lined with aluminum profile inner frame and high strength honeycomb panels , surrounded by high quality stainless steel shut perfect treatment , high dimensional accuracy , closed surface made of high quality EPDM special rubber seal to be perfect seamless seal , Bao steel steel board used in all high-quality cold-rolled steel , the surface with high-quality weather-resistant color pure polyester electrostatic powder coating , its performance in line with GB5237.4-2000 standard (in line with European standards QUALICOA D), and the development of a variety of wood effect , Door Press (medical diagnostic X-ray emission prevention health protection requirements ) lining thickness corresponding stereotype . protective harness toward lining 2mmpb thickness , the thickness of the other 1mmbp protection , The vertical axis hinge design unique , different from the conventional hinge , changing the point of impact to avoid sagging door , making more durable protective door , you open smoothly
Automatic Medical Airtight Doors with airtight , Sound insulation , thermal insulation , fire protection , radiation protection
1 Using a small volume , high-power brushless DC motor , frequent opening and closing , also can be long-term trouble-free operation
2. The sides of the door equipped with professional vacuum airtight tape , using a unique compression technology to ensure the door when the door is closed with the close coordination to achieve reliable sealing effect
3. With foot switch and special handle , health care workers to open the door easily , when power outage it can be opened by handle
4. The Safety sensors can effectively prevent the clip people , also can be set to automatic door sensor drive from indoor
5. Also can be opened easily by a remote control
6. The user can set the sensor effects , the flexibility to set the sensor operation mode according to the doctor`s work habits and characteristics of various types of surgery , in order to achieve the best results
Designed for clean room environments such as hospital operating rooms , pharmaceutical production plants, precision equipment factories, food shop , laboratory access port
Technical parameters
Power Voltage : 220V/50HZ
Power consumption : <150w
Door weight :<200KG
Opening/Closing speed : 20-60cm/sec
Closed way: Auto/induction
Safety Light Beam Switch :
This is which accord with the European standards , with a completely interference immunity . Also accord with ESC standards and in line with the French government about the workplace regulations require automatic doors
Accord with German regulations concerning the outer doors of power starting
hospital door, hospital sliding door, medical sliding door , automatic medical airtigh door, clean room door ,operating theaters door
SHENZHEN HONGFA AUTOMATIC DOOR CO., LTD , https://www.hongfafd.com