45results about How to "Small work area" patented technology

The invention discloses a crushing and ridging culture method of rice. The method comprises the following steps that: a spiral bit machine is adopted to vertically mill the soil in a rotary manner to naturally form beds and ridges, the rotary milling depth in the soil is 20-30cm, the spiral bit machine is ensured to rotate till the raw soil layer and crush the soil into fine powder and ridge the soil, the crushed soil naturally floats upwards about 5-10cm, the soil is deeply loosened and the soil layer is not disturbed, the bed width ranges from 60cm to 300cm depending on the number of the crushing and ridging mechanical bit devices, irrigation and drainage ditches are formed between the beds, the no-tillage depth of the ditch bottoms is 20-30cm and the ditch width is 15-25cm; then directly seeding or seedling throwing or seedling transplanting after water return is carried out on the crushed and ridged fields; and the field moisture alternates between wetting and drying. The method has the following advantages: the traditional mode of directly seeding dry rice after harrowing the whole field with ploughs and transplanting (throwing) seedlings of rice after harrowing the field with ploughs is changed; the soil is fine and loose, has deeper active layer, stores and retains water, has sufficient oxygen, is beneficial to quick rooting and more roots, improves the drought, insect pest and lodging resistance, uses water to regulate atmosphere, fertilizers and growth, can meet the requirements of high yield, growth and development of rice for water, atmosphere and nutrients and improves the yield and quality of rice.

The invention discloses an RH vacuum tank building device. The RH vacuum tank building device comprises a building trolley, wherein the building trolley comprises a frame; the frame is a three-layer steel structure frame; a lifting mechanism is fixed on the top layer, and a lifting platform is hung on the lifting mechanism; the lifting mechanism is electrically connected with a lifting controller and is controlled by the lifting controller; a mobile controller and a driving mechanism are installed on the bottom layer of the frame; the driving mechanism is electrically connected with the mobile controller and is controlled by the mobile controller; a straight ladder is arranged between the middle layer and the bottom layer of the frame. The driving mechanism is controlled by the mobile controller, so that the building trolley is horizontally moved to the building position; the lifting mechanism is controlled by the lifting controller for providing power to the lifting platform, and then the lifting mechanism is declined from the upper tank to the tank body and the worker can enter the tank; when the lifting platform reaches the position near the bottom part of the lower tank, a cover plate trolley is moved away, and the worker descends to the bottom part of the lower tank to build through an opened manhole. The tank body placing position and the work plane height are reduced and the lifting route of the building platform is shortened. The RH vacuum tank building device has the characteristics of reliable lifting and convenient and safe operation.

The invention provides an assembly type hydraulic box culvert template and a construction method of a prefabricated assembly type box culvert of the assembly type hydraulic box culvert template, and belongs to the field of highway engineering construction. The assembly type hydraulic box culvert template comprises a template, a hydraulic power system and an adjusting support. The construction method comprises the steps that the assembly type hydraulic box culvert template is installed; the template is used; steel bars are machined and installed; a steel bar framework is hoisted put into the template; an internal mold is installed; the template is installed while concrete is poured; the concrete is poured; the concrete is cured; and the template is removed, and finally the prefabricated assembly type box culvert is prepared. The box culvert can be prefabricated in a centralized mode, and is installed on site, so that a lot of concrete is saved, the construction progress is accelerated,construction cost is reduced, damage and pollution to underground water and soil are greatly reduced, and the box culvert is especially prominent in green and environment-protecting aspects; and the entity quality of culverts is effectively improved, the yield of the appearance and a protection layer is greatly improved, and good economic and social benefits are obtained.