The rainy weather poses obstacles to the control of pests and diseases in crops. To improve the drug use in the rainy season, the following three aspects must be done:
First, the selection of drugs should use quick-acting pesticides and systemic pesticides. For example, in the insecticide, the cockroach, deltamethrin, etc., 1 to 2 hours after application, can kill the pests, even if the rain drenches into the shed, the effect on the efficacy is small. The systemic pesticide can enter the plant through the roots, stems, leaves and other parts of the plant, and is transported to other parts to play a poisonous killing effect within a certain period of time. If the systemic pesticide such as carbendazim is applied for 2 to 3 hours after application, more than 60% of the active ingredient is absorbed into the tissue by the crop, and the effect is not affected by rain showering.
2. Adding an adhesive to the liquid in the preparation of the pesticide, add some adhesives, such as washing powder, saponin, etc. After the application, it is not easy to wash away the liquid after the application. Dropping some diesel or kerosene emulsion into the liquid can also enhance the adhesion of the pesticide to the surface of the pest.
Third, we must grab the rain spray to pay attention to observe the weather changes, seize the rain gap and spray in time, avoid spraying while spraying. Generally, no rain is observed within 8 hours after spraying, and the effect on the efficacy is small.
According to different methods of use, winches can be divided into four types: manual winches, electric winches, pneumatic winches, and hydraulic winches. At present, the largest marine hydraulic winch is 350T, and the weight of the equipment reaches 150T.
According to the reel form, it is divided into single reel and double reel.
According to the reel distribution, there are parallel double reels and front and rear double reels.
The main technical indicators of hydraulic winches include rated load, supporting load, rope speed, rope capacity, etc.
A winch is a light and small lifting device (see hoisting machinery) that uses a reel to wind a wire rope or chain to lift or tow heavy objects, also known as a hoist. The winch can be used alone or as a component of machinery such as lifting, road construction and mine hoisting. It is widely used because of its simple operation, large rope winding volume and convenient displacement. The winch is also known as the hoist. The product has high versatility, compact structure, small size, light weight, heavy lifting, and convenient transfer. It is widely used in construction, water conservancy projects, forestry, mines, docks, etc. for material lifting or flat towing, and can also be used as modern electronic control Supporting equipment for automatic operation line.
According to the power, the winch is divided into three categories: manual, electric and hydraulic.
The transmission mechanism of the handle rotation of the manual winch is equipped with a stopper (ratchet wheel and pawl), which can keep the heavy object in the required position. The manual winch used for assembling or lifting heavy objects should also be equipped with safety handles and brakes. Manual winches are generally used in places where the lifting capacity is small, the facilities are poor, or where there is no power supply.
Electric winches are widely used in places with heavy work and large traction requirements. The electric motor of the single-drum electric winch (pictured) drives the drum through the reducer, and a brake is installed between the electric motor and the input shaft of the reducer. In order to meet the needs of lifting, traction and rotation, there are also double-drum and multi-drum winches. Generally, a winch with a rated load lower than 10T can be designed as an electric winch.
The hydraulic winch is mainly a winch with a larger rated load. Generally, the winch from 10T to 5000T is designed as a hydraulic winch. The winch can be divided into:
Marine winches: Marine winches can be divided into drag winches, mooring winches, anchor winches, traction winches, etc.
Engineering winch: Mainly used in engineering, with functions such as hoisting and hoisting as the main function.
Mine winches: divided into hoisting winches, dispatching winches, shaft sinking winches, column return winches, rake mine winches, column return winches, etc.
Cable winch: mainly used when laying cables.
Lifting And Traction Winch,Pneumatic Winches,Hydraulic Winches,Electric Winches
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