TRUSS SPAN OF THE SPRINKLER MACHINE Russian patent published in 2022 - IPC A01G25/09 

FIELD: agriculture.

SUBSTANCE: invention relates to the field of agriculture. The truss span of the sprinkler machine contains a truss with subdivided panels placed at one end on a self-propelled trolley, which is a prefabricated, prestressed structure, the upper belt of which is formed by a water supply pipeline consisting of thin-walled galvanized steel pipes with an outer diameter of 159 mm, connected by means of flanges, between which sealing polyethylene gaskets are installed. The water supply pipeline is assembled from six pipes. The first five pipes of the truss are interchangeable and identical in length and design, and the last, sixth, pipe is equipped with fasteners for the support posts of the self-propelled trolley. Sections of crossbars are mounted on the water supply pipeline, each of which is formed by four crossbars and a crossbar connecting their ends. The further the section of crossbars is located from the center of the truss, the shorter crossbars are used in it. The sections of the crossbars are connected to each other by means of trusses with subdivided panels, which form the two lower belts of the truss. The upper and lower truss belts are arranged along smooth parabolic curves. This arrangement of the truss belts is achieved due to the fact that in each section of the truss crossbars, the crossbars with a slope towards the middle of the truss are made longer than the crossbars with a slope towards the end of the truss. The further the section of crossbars is located from the middle of the truss, the greater the difference in the length of these crossbars. To connect with adjacent spans at the ends of the truss, hinge assemblies are installed with pipes that are part of the water supply pipeline. The hinge assemblies are equipped with fasteners for the extreme trusses with subdivided panels. Each truss with subdivided panels is made in the form of an all-metal rod of circular cross-section, at the ends of which eyelets with fixing holes are welded. All trusses with subdivided panels are made interchangeable and identical in length and design. The last section of the crossbars of the truss with the help of stiffeners is connected to the racks of a self-propelled trolley, which is equipped with an electric drive that drives two wheel reducers, the output shafts of which are equipped with supporting pneumatic wheels. The wheel reducers are mounted on the edges of the self-propelled trolley and each of them is secured with five bolts. Sprinkler nozzles are placed on the water supply pipeline, and steel components and parts of the metal structure of the span, with the exception of fasteners, are galvanized by hot-dip galvanizing. In order to increase the span length to 71.05 m, the truss is additionally equipped with a central section of crossbars. The total number of sections of crossbars in the truss has been increased to eleven. To tighten the trusses with subdivided panels connected to the central section of the crossbars, an expansion ring with an additional polyethylene gasket is installed in the flange connection of the pipes located in the center of the truss above the crossbars of the central section. The sealing gaskets are located on both sides of the expansion ring. To increase the degree of prestressed state of the truss, its trusses with subdivided panels are installed in a special order, in which, in the projection of the trusses with subdivided panels on the horizontal plane, their eyelets are arranged in the form of steps of a ladder ascending from the center to the edges of the truss. The water supply pipeline is made of six pipes of the same length. The self-propelled trolley is equipped with UMC 765-UV wheel reducers, each of which is secured with five bolts having a Grade 8 strength class according to SAE J429.

EFFECT: reduction in the number of self-propelled trolleys, a reduction in the weight and metal consumption of the machine, a reduction in energy consumption for its movement, as well as a reduction in the coefficient of losses of irrigated land under the track.

11 cl, 18 dwg