Support elements for water-carrying pipeline of a self-propelled multi-tower sprinkler irrigation machine

Abstract

The utility model relates to agriculture and can be used in the construction of trusses, central pivoting supports, self-propelled support carriages and other support elements for supporting a water-carrying pipeline, specifically a water-carrying pipeline of a self-propelled multi-tower sprinkler irrigation machine. The claimed support elements for a water-carrying pipeline 1 of a self-propelled multi-tower sprinkler irrigation machine are made of low-carbon steel having a carbon content of from 0.01% to 0.4% in the form of angle bars having a length of 1-4 m and a zinc coating having a thickness of 40-250 µm. The steel from which the angle bars are made for struts 12, cross-members 13, a central pivoting support 5 and self-propelled support carriages 3 contains from 0.12% to 0.3% silicon, not more than 0.06% phosphorous and not more than 0.06% sulphur.

Description

[0001] SUPPORT ELEMENTS OF THE WATER PIPELINE OF A SELF-PROPELLED MULTI-SUPPORT IRRIGATION MACHINE

[0002] The utility model relates to agriculture and can be used in the design of trusses, central pivot supports, self-propelled support trolleys and other supporting elements supporting a water pipeline, namely, a water pipeline of a self-propelled multi-support irrigation machine.

[0003] Support elements of a water supply pipeline of a self-propelled multi-support irrigation machine are known, described in the patent of the Russian Federation for utility model No. 216737 (published on February 27, 2023).

[0004] The supporting elements are made in the form of diagonals connecting the water supply pipeline on both sides with the lines of ties (trusses), between which spacers (crossbars) are located.

[0005] A similar design for the support elements of a self-propelled multi-support irrigation machine's water supply pipeline is known from Russian Federation patent for utility model No. 173953 (published September 21, 2017). The braces are made of angle iron, and the crossbars are made of pipe with flattened, bent ends, and fitted with mounting holes. Making the crossbars from pipe is not an optimal solution, as the crossbar's interior is not airtight and lacks moisture removal, leading to increased internal corrosion of the crossbar.

[0006] The prototype is the design of the supporting elements of the water supply pipeline of a self-propelled multi-support irrigation machine, known from Russian Federation patent for invention No. 2781626 (published October 17, 2022), in which the truss span of the irrigation machine contains a truss truss, located at one end on a self-propelled cart, which is a prefabricated prestressed structure. The upper chord of the truss is formed by a water supply pipeline consisting of thin-walled galvanized steel pipes. Sections are mounted on the water supply pipeline.

[0007] A SUBSTITUTE SHEET of diagonals, each formed by four diagonals and a crossbar connecting their ends. The farther a diagonal section is from the center of the truss, the shorter the diagonals and crossbars used. The diagonal sections are connected to each other using trusses, which form the two lower chords of the truss. The upper and lower chords of the truss are arranged along smooth parabolic curves.

[0008] To ensure the required strength of the structure and to enable hot-dip galvanizing, the parts and assemblies of the span metal structure, with the exception of fasteners and truss rods, are made of calm steel grades StZsp5 and StZsp with a silicon content of 0.15% to 0.25% and an arsenic content of less than 0.08%.

[0009] The technical challenge of the described design is the uniform approach to hot-dip galvanizing for all components of the irrigation machine's span, which reduces the variability of the permissible chemical composition of the steel used to manufacture the supporting elements of the water supply pipeline. It is clear from the outset that hot-dip galvanizing long, thin-walled steel pipes 11,600 mm long and 159 mm in external diameter requires special conditions that take into account the specified geometric and physical parameters.

[0010] Thus, when galvanizing the aforementioned pipes by dipping them into molten zinc, given the specifics of the hanging scheme for long products, the coating thickness on the top and bottom of the structure differs, as the time the bottom and top parts spend in the melt differs. It is impossible to reduce this time and speed up the dipping process, as filling the pipe's interior is a rather lengthy procedure. The time it takes to remove the pipe from the melt and drain the zinc from its cavity must also be taken into account. Furthermore, the time it takes for thin-walled long steel pipes to be in the zinc melt should be as short as possible to avoid warping (wall deformation in the form of metal deflections), as well as deviations in axial straightness (curvature) of more than 0.2% of the pipe length, which may make the part unusable in an assembled structure. Under the influence of

[0011] REPLACEMENT SHEET temperature stresses associated with metal deformation during installation and operation may cause peeling of the coating, which contributes to the formation of corrosion centers.

[0012] At the same time, the aforementioned limitations of hot-dip galvanizing do not apply to the supporting elements of water pipelines, which are typically made of steel angles (Fig. 3, Fig. 15, Fig. 16 of Russian Federation Patent No. 2781626). The appearance of galvanized supporting elements is not critical, and the galvanized surface area is insignificant compared to the external and internal surfaces of the pipe. The speed of insertion and removal of supporting elements in the form of steel angles 1-3 meters long is quite high due to their short length and the absence of cavities that pose challenges when filling and removing molten zinc.

[0013] The website https: / / konus.by / goryachee-czinkovanie / o-goryachem-czinkovanii.html (page "Technical Regulations," document "Technical Regulations for Hot-Dip Galvanizing of Metal Structures") provides recommended silicon content values ​​for low-carbon steels with a carbon content of less than 0.25% for subsequent cost-effective and smooth hot-dip galvanizing. One of the optimal ranges is from 0.15% to 0.25% silicon content. At the same time, the maximum permissible silicon content is 0.37%, and the lower limit for appearance is 0.12%. From the Internet resource https: / / ankorltd.ru / cinkovanie / goryachee-cinkovanie / zashchita- goriachim-tcinkovaniem / (SP 53-101-98 “Manufacturing and quality control of steel building structures” (approved and put into effect by the Resolution of the State Construction Committee of the Russian Federation dated May 17, 1999).N 37) it is known that in order to prevent the formation of cracks in zinc coatings during operation, its thickness should not exceed 250 µm. It also provides data on the change in zinc coating thickness for metal thicknesses of 6 mm and more, depending on the silicon content in the steel and the time the product is held in molten zinc at a bath temperature of 480°C. Thus, with a silicon content of

[0014] SUBSTITUTE SHEET steel in the range from 0.12% to 0.3% and holding time up to 6 minutes, the thickness of the zinc coating does not reach the limit value of 250 µm.

[0015] The Internet resource https: / / www.bls.bv / uslugi / ro M4ee-nHHKOBaHHe indicates the maximum permissible content of sulfur and phosphorus at 0.03% each in steel subjected to hot-dip galvanizing.

[0016] The specified technical problem for the supporting elements of the water supply pipeline of a self-propelled multi-support irrigation machine, made of low-carbon steel in the form of angles 1 - 4 m long with a zinc coating 40 - 250 μm thick, is solved by the fact that they are made of steel with a silicon content of 0.12% to 0.3%, with a carbon content of 0.01% to 0.4%, with a phosphorus content of no more than 0.06% and with a sulfur content of no more than 0.06%.

[0017] The technical result of the utility model is the expansion of the arsenal of technical means, namely, the expansion of the variability of the permissible chemical composition of steel used for the manufacture of supporting elements of water pipelines, such as diagonals and crossbars of truss spans and structural elements of central rotary supports of mobile multi-support irrigation machines.

[0018] The claimed utility model is shown in the following figures.

[0019] Fig. 1 shows a truss irrigation machine.

[0020] Fig. 2 shows the span of a truss irrigation machine, front view.

[0021] Fig. 3 shows the span of a truss irrigation machine, viewed from above.

[0022] Fig. 4 shows a sprinkler machine with a cable support system, front view.

[0023] Fig. 5 shows a sprinkler machine with a cable support system, viewed from above.

[0024] Fig. 6 shows a variant of the design of the central rotary support of the irrigation machine.

[0025] Fig. 7 shows the support trolley of the water supply pipeline of the irrigation machine.

[0026] Fig. 8 shows the installation unit for the support element section on the lower chord of the truss, front view.

[0027] REPLACEMENT SHEET Fig. 9 shows a cross-section of the span of a truss irrigation machine.

[0028] Fig. 10 shows the installation unit for the support element section on the lower chord of the truss, view A in Fig. 9.

[0029] Fig. 11a, 11b, 11c show a corner as the basis for the supporting elements of a water supply pipeline of a self-propelled multi-support irrigation machine in three projections.

[0030] The sprinkler machine (Fig. 1, Fig. 4, Fig. 5) comprises a water supply pipeline 1 with spraying devices 2 connected thereto, mounted on support trolleys 3 with wheels 4 (Fig. 7) with the ability to move along the treated field around the central rotary support 5 (Fig. 6). Each of the support trolleys 3 is self-propelled and is provided with a drive electric motor 6 (Fig. 1, Fig. 7)) or a hydraulic piston engine 7 (Fig. 4), connected to at least one wheel 4 of the trolley 3. The sprinkler machine is provided with a support system for the water supply pipeline 1 in the form of trusses 8 (Fig. 1, Fig. 2, Fig. 3) or a cable support system (Fig. 4, Fig. 5), including cable supports 9 on the support trolleys 3.

[0031] The most frequently used truss irrigation machines are those in which the truss span (Fig. 2, Fig. 3) comprises a truss 8, which is a prefabricated prestressed structure, mounted at one end on a self-propelled support trolley 3. The upper chord of the truss 8 is formed by a water supply pipeline 1, consisting of thin-walled galvanized steel pipes. Sections 10 of the support elements are mounted on the water supply pipeline 1, each formed by four diagonals 11 and a crossbar 12 connecting their ends (Fig. 8, Fig. 9, Fig. 10). The further the section 10 of the support elements is located from the center of the truss 8, the shorter the diagonals 11 and crossbars 12 used in it. Sections 10 of the supporting elements are connected to each other using trusses 13, which form two lower chords of the truss 8. The upper and lower chords of the truss 8 are located along smooth parabolic curves.

[0032] SUBSTITUTE SHEET The supporting elements of the water supply pipeline 1 of the self-propelled multi-support irrigation machine are made of low-carbon steel with a carbon content from 0.01% to 0.4% in the form of angles (Fig. 11) 1 - 4 m long with a zinc coating 40 - 250 μm thick. The steel, from which the angles for the diagonals 11, crossbars 12, central rotary support 5 and self-propelled support trolleys 3 are made, contains silicon from 0.12% to 0.3%, phosphorus no more than 0.06% and sulfur no more than 0.06%. As tests of the self-propelled multi-support irrigation machines have shown, the supporting elements of the water supply pipeline, made in the form of steel angles with the specified chemical composition and a zinc coating formed by the hot-dip galvanizing method, operate stably and reliably in various climatic conditions. Thus, the range of steels used for the manufacture of supporting elements of water pipelines can be expanded by adding steels with the stated chemical composition.

[0033] SUBSTITUTE SHEET

Claims

FORMULA OF A UTILITY MODEL 1. Support elements of the water supply pipeline of a self-propelled multi-support irrigation machine, made of low-carbon steel in the form of angles 1-4 m long with a zinc coating 40-250 μm thick, characterized in that they are made of steel with a silicon content of 0.12% to 0.3%, with a carbon content of 0.01% to 0.4%, with a phosphorus content of no more than 0.06% and with a sulfur content of no more than 0.06%. SUBSTITUTE SHEET

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