A gravity-based defrosting and snowing device for agricultural greenhouses

Abstract

The invention relates to the field of defrosting and snowing in agricultural greenhouses, and discloses a device for defrosting and snowing in agricultural greenhouses based on gravity. The top of the support column is fixedly connected with a horizontal plate, and the outer side of the lead screw is movably connected with a snow-removing arc through a connecting seat. The outer side of the snow removal arc plate is fixedly connected with a scraper, and the top of the horizontal plate is respectively movably connected with the first movable plate, the second movable plate and the installation block, and the first movable plate and the second movable plate are installed on the side facing the greenhouse. The pressing plate and the installation block are respectively provided with a spring and a switch. When the metal sheets on both sides are all in contact with the switch, the device can be started normally. The gravity-based agricultural greenhouse defrost and snow device, if there is too much snow on the top of the greenhouse, the spring will be compressed under the action of gravity. The purpose of starting, and avoiding the problem of frequent starting of the device caused by false touches caused by external factors.

Description

technical field [0001] The present invention relates to the field of defrosting and snowing in agricultural greenhouses, specifically a gravity-based defrosting and snowing device for agricultural greenhouses Background technique [0002] With the production of high molecular polymers such as polyethylene, plastic films are widely used in agriculture. The use of plastic films to cover agricultural greenhouses and greenhouses has achieved good results, which can effectively reduce the impact of the natural environment on crop growth and produce various cross-season products. Agricultural products, and greatly increase the yield of crops, effectively improve the economic benefits of growers, and promote economic development. [0003] Most of the existing agricultural greenhouses are supported by skeletons, which are covered with a film structure, which has a good thermal insulation effect. However, due to the large span of the greenhouses, the bearing capacity is not strong. W...

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Problems solved by technology

[0003] Most of the existing agricultural greenhouses are supported by skeletons, which are covered with a film structure, which has a good thermal insulation effect. However, due to the large span of the greenhouses, the bearing capacity is not strong. When encountering heavy snow, if there is a lot of snow, it is easy to As a result, the greenhouses are crushed. The current agricultural greenhouses lack the function of automatic snow removal. Manual cleaning is often used, which is not only slow in efficiency, but also easily causes damage to the film by snow removal tools. The snowboard scrapes off the snow, but cannot make it fall smoothly to the outside of the greenhouse, resulting in too concentrated snow weight, causing a partial collapse of the greenhouse, and cannot start automatically, or the automatic start device cannot avoid the influence of other factors, resulting in frequent starts The problems caused by the disadvantages of short service life and waste of electricity have increased the cost of use, which is not conducive to the improvement of economic benefits

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