When guiding the production in the field, it is often found that farmers have the following misunderstandings in the prevention and control of crop pests and diseases: (1) blind prevention and treatment: pesticides are applied without clearing the disease. (2) The choice of pesticides is not correct: use insecticides when seeing insects, and use fungicides when seeing spots. (3) The best prevention and control period for conventional pests and diseases can not be grasped. (4) Improper preparation of pesticides. (5) Spraying pesticides is not correct. (6) Improper time for pesticide application. Due to the above reasons, the appropriate period of prevention and control has been delayed, resulting in excessive control costs and poor control effects. In response to the above problems, combined with the actual production of several suggestions for production reference.
First, find out the situation of pests and diseases, the right medicine: carefully identify the symptoms of pests and diseases, a variety of pests and diseases mixed or the pests and diseases are not clear, ask the scientific and technical personnel to find out the disease and insects, choose high-efficiency counterpart pesticides , The right medicine.
Second, grasp the appropriate period of prevention and control, organize on-site training: agricultural science and technology personnel should often go to the field to check the situation, in the best prevention and control period of pests and diseases, carry out on-site training sessions, in the simplest way to enable farmers to master different diseases at the fastest Insect control time and method.
Third, strictly in accordance with the standard concentration of pharmaceutical liquid: in the preparation of liquid medicine, read the instructions carefully, strictly proportional to the preparation of pesticide concentration, it is strictly prohibited to increase the dosage or concentration, no well water and sewage against pesticides. Before cleaning the pesticide, clean the bucket and the watering can with water. First add a small amount of water to the bucket, weigh the medicine according to the standard area and add it to the bucket. Dilute with water and mix well. Add one third of the water in the watering can. According to the concentration of the liquid solution, divide the prepared liquid into several parts, and take one part into the barrel. Add enough water and mix well to spray.
Fourth, master the application of techniques, send medicine in place: adjust the nozzle when spraying pesticides, so that the liquid sprays from the nozzle to form a layer of mist adhered to the stems and leaves of the crop. When applying pesticides, you must master the speed, not fast or slow, so do not leak the spray. When applying pesticides, different pesticides and pesticides should be used according to the hazards and occurrences of pests and diseases, and pesticides should be delivered in place. For pests and diseases that endanger the roots, the pesticide is applied to the roots of the plants, applied by the ditch, applied or poured; the food on the back of the leaves is sprayed onto the opposite side of the leaves, such as controlling aphids, rice planthoppers, Ye Wei chooses a systemic insecticide that sprays the liquid from top to bottom and repeatedly from bottom to top onto the stems and leaves.
Fifth, timely application of pesticides: when applying pesticides, choose sunny days, according to the law of insect activity, to achieve a favorable time to apply pesticides. It is advisable to use pesticides and pesticides for most pests after 4 pm. Evening insects such as chafers and ground tigers should be applied in the evening.
More pesticide knowledge , please pay attention to China Pesticide Network
Elevator modernization (or lift modernisation) is the process of upgrading the critical parts of the elevator in order for it to be able to handle new technology, have better performance, improve safety, and even give the aesthetics an up-to-date appeal
Most elevators are built to provide about 20 years of service, as long as service intervals specified and periodic maintenance/inspections by the manufacturer are followed. As the elevator ages and equipment become increasingly difficult to find or replace, along with code changes and deteriorating ride performance, a complete overhaul of the elevator may be suggested to the building owners.
A typical modernization consists of controller equipment, electrical wiring and buttons, position indicators and direction arrows, hoist machines and motors (including door operators), and sometimes door hanger tracks. Rarely are car slings, rails, or other heavy structures changed. The cost of an elevator modernization can range greatly depending on which type of equipment is to be installed.
Modernization can greatly improve operational reliability by replacing mechanical relays and contacts with solid-state electronics. Ride quality can be improved by replacing motor-generator-based drive designs with Variable-Voltage, Variable Frequency (VVVF) drives, providing near-seamless acceleration and deceleration. Passenger safety is also improved by updating systems and equipment to conform to current codes.
Components needs to be replaced in different elevator modernization plan
| Component | Scheme of elevator modernization plan | |||
|---|---|---|---|---|
| Refurbishment work | Partial modernization | Full modernization | Full replacement | |
| Elevator car | ||||
| Sling | No | No | by building owners | Yes |
| Door operator | No | by building owners | Yes | Yes |
| Cab design | by building owners | by building owners | Yes | Yes |
| Car doors | by building owners | by building owners | Yes | Yes |
| Car fixtures | Yes | by building owners | Yes | Yes |
| Wedges connected to the governor | No | No | Yes | Yes |
| Additional phone/intercom if they don't equipped | by building owners | Yes | Yes | Yes |
| Traveling cable | No | Yes | Yes | Yes |
| Hydraulic rams | No | No | No | Yes |
| Wire ropes | No | by building owners | Yes | Yes |
| Shaft | ||||
| Counterweight | No | No | No | Yes |
| Guide rails | No | No | No | Yes |
| Buffers | No | No | Yes | Yes |
| Electrical components | No | No | No | Yes |
| Tapehead | No | Yes | Yes | Yes |
| Limit switches | No | Yes | Yes | Yes |
| Wiring | No | Yes | Yes | Yes |
| Compensations | No | No | No | Yes |
| Lobby | ||||
| Shaft door components | by building owners | by building owners | Yes | Yes |
| Shaft doors | by building owners | by building owners | by building owners | Yes |
| Hall fixtures | Yes | by building owners | Yes | Yes |
| Machine room | ||||
| Machines | No | by building owners | Yes | Yes |
| Controllers | No | Yes | Yes | Yes |
| Removal of the selector | by building owners | Yes | Yes | Yes |
| Overspeed governor | No | No | Yes | Yes |
| Additional unintended car movement protection device if they don't equipped | by building owners | by elevator safety code in countries | ||
| Backup battery or uninterruptible power supply | No | Yes | Yes | Yes |
Benefits of elevator modernization
Modernization can greatly improve operational reliability by replacing mechanical relays and contacts with solid-state electronics. Ride quality can be improved by replacing motor-generator-based drive designs with Variable-Voltage, Variable Frequency (VVVF) drives, providing near-seamless acceleration and deceleration. Passenger safety is also improved by updating systems and equipment (such as double brake system, unintended car movement protection device on the brake system etc.) to conform to current codes.
With CEP traction elevator modernization, we use the existing elevator structure while upgrading the ride quality and reliability with state-of-the-art components. Upgrade to a CEP closed loop door operator or a sophisticated, energy saving VVVF inverter.
CEP traction elevator modernization can include:
- CEP Microprocessor Based Control System
- CEP Microprocessor Based Efficient Dispatch System
- Energy Efficient AC Drives or SCR Drives on Existing AC Gearless Machines
- Traction Machines (Geared / Gearless)
- Rope Brake System
- CEP Closed Loop Door Operating System
- Car & Hall Pushbutton Fixtures & Indicators
- Car & Counterweight Roller Guides
- Seismic Upgrades
- Security Upgrades
- Cab Interior Renovations or Cab Replacement
NOTE: Complete tear-out modernizations are available.
Contact us TODAY for Right Modernization Package Available
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Elevator Modernization,Lift Modernisation,Passenger Lift Modernization,Passenger Elevator Modernization
CEP Elevator Products ( China ) Co., Ltd. , https://www.china-elevators.com