What are the problems in using reel sprinkler irrigation machine? How to solve it?

As an agricultural high-efficiency and water-saving irrigation equipment, reel sprinkler irrigation machine is widely used in Europe, America, Australia and other agricultural developed countries. Its development history has been more than 70 years. A number of world-famous brands such as Oakmis of Italy, Il of France, Paul of Austria and so on have emerged, which are well received and praised by farmers. What are the problems encountered in using reel sprinkler irrigation? How to solve it?

I. the use of reel sprinkler

1. The amount of irrigation is not enough. Users report that in case of drought, the reel sprinkler can not pour water, and the amount of irrigation can only reach 20m ³/ mu at most, so the surface will dry soon after irrigation. However, the amount of irrigation after sowing and heading stage of wheat and corn must be 30-40m / mu, so it is difficult for sprinkler to adjust the amount of irrigation, which can not meet the irrigation demand of wheat and corn.

2. The energy consumption of operation is too high. It is estimated that irrigating an acre of land consumes 23 kilowatt-hours of electricity (based on the motor-well submersible pump 7.5kW and booster pump 15kW), which is about 13 yuan, so some users complain that the electricity cost of the sprinkler is more expensive than the labor cost.

3. The sprinkler car occupies an area to press seedlings. When the tractor pulls the sprinkler car into the ground, it will press two rows of crops every 50m or so, which is difficult to accept the waste of land by sprinkler irrigation machine.

In view of the third situation, it is acceptable for large grain growers, because there is no need to repair canals and ridges, which covers more land than tractors, and users already know and understand it when they buy it. but the first and second problems are not acceptable, so many users complain or the equipment is idle after purchase.

Second, the analysis of the causes of the problems

1. Product design

Since the reel sprinkler was introduced into China in the 1970s, except for some large-scale state-owned farms, the domestic sales market is very small. In recent years, the rise of land transfer gradually has a new market, so there is a lack of corresponding technological innovation and product upgrading. At the same time, after more than 30 years of development, the design and manufacturing technology of sprinkler irrigation machine in Europe, America, Australia and other countries has been updated for several generations, but our country still adopts the design of foreign countries 30 years ago, such as the transmission of two-speed gearbox, the speed regulation range is too large, so that the sprinkler irrigation machine needs a lot of starting power to start, but once started, the speed of PE pipe can not be lower than that of 15m/h. It can not meet the irrigation needs of users with 30-40m ³/ mu. If the oblique impact type water turbine structure is adopted, the hydraulic efficiency is too low, in addition, the water turbine and the gearbox are driven by the belt, the transmission efficiency is on the low side, which increases the pressure on the sprinkler irrigation machine, which generally needs to be above 0.6MPa. If the inlet pressure exceeds 0.6MPa, each sprinkler generally needs to be equipped with a booster pump, resulting in the combined operation of a well submersible pump and a booster pump in the actual work of the reel sprinkler machine, which will undoubtedly greatly increase the operation cost.

2. Production process

When the reel sprinkler first entered the market, each machine cost more than one hundred thousand yuan, but with the expansion of market demand, manufacturers are springing up like bamboo shoots after a spring rain, from several to dozens of enterprises. Disorderly competition among enterprises has reduced the number of products from more than 100,000 yuan to 70,000 yuan to 80,000 yuan, to 40,000 yuan to 50,000 yuan, to 20,000 to 30,000 yuan now. The enterprise can only reduce the production cost, and the product technological process is also simplified. for example, the gear of the gearbox needs to be ground according to the process requirements, and after it is changed to a simple gear shaping process, the processing cost will be reduced several times, but the gear will become rough. driving gear transmission requires more power and increases noise. The water turbine needs heat treatment according to the process requirements, but without heat treatment in order to reduce the cost, rough machining reduces the efficiency of the water turbine. The simplification of these processes directly leads to the increase of energy consumption in the operation of sprinkler irrigation machine.