Method for layout of water-conducting pipeline of low-pressure circular-move sprinkler machine with truss structure of spans
Patent Information
- Authority / Receiving Office
- RU · RU
- Patent Type
- Patents
- Current Assignee / Owner
- FEDERALNOE GOSUDARSTVENNOE BYUDZHETNOE OBRAZOVATELNOE UCHREZHDENIE VYSSHEGO OBRAZOVANIYA SARATOVSKIJ GOSUDARSTVENNYJ UNIV GENETIKI BIOTEKHNOLOGII I INZHENERII IMENI N I VAVILOVA
- Filing Date
- 2025-02-26
- Publication Date
- 2026-06-30
AI Technical Summary
Existing pivot irrigation machines face inefficiencies in weight, metal consumption, and energy usage due to the design of the water supply pipeline, particularly the first section, which is not optimized for irrigation intensity and self-propelled cart operation, leading to increased energy consumption and wear.
The method optimizes the length of the first section of the water supply pipeline using truss spans of varying lengths, placing the longest spans at the beginning to reduce weight and metal consumption while ensuring the required water flow, and equips the outer span with a console for increased irrigation radius.
This approach reduces the machine's weight and metal consumption, extends the service life of self-propelled cart drives, and optimizes water flow for efficient irrigation, minimizing energy use and track alignment issues.
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Abstract
Description
[0001] The proposed invention can be used in low-pressure circular irrigation machines having a variable working cross-section of the water supply pipeline and used for irrigating agricultural crops.
[0002] The water supply pipeline of the pivot irrigation machine is formed by truss spans that are connected to each other in a series of hinged connections. The outer span of the machine is also equipped with a console, allowing for a larger irrigation radius.
[0003] Each truss span is a truss with a pipeline, one end of which is mounted on a self-propelled cart equipped with an electric drive and pneumatic support wheels. Typically, the self-propelled cart drive is an electric gearmotor, which drives two worm-type wheel reducers located at the ends of the cart. During operation, the self-propelled carts move the irrigation machine around a fixed support, which is supplied with electricity and irrigation water.
[0004] Irrigation machine truss spans can have varying lengths. Typically, each irrigation machine manufacturer offers several span lengths for a specific pipeline diameter. The longest spans can be achieved with piping made of Ø168 mm or Ø159 mm pipes [1, 2]. Using spans of varying lengths in an irrigation machine allows for a more precise selection of the machine length to suit the size of the irrigated area. In most cases, the truss piping is made of thin-walled galvanized steel pipes, connected by flanges.
[0005] The following diameters of thin-walled steel pipes are used for water supply pipelines of low-pressure irrigation machines: Ø114.3 mm; Ø127 mm; Ø133 mm; Ø141.3 mm; Ø152.4 mm; Ø159 mm; Ø168 mm; Ø177.8 mm; Ø193 mm; Ø203 mm; Ø219 mm; Ø254 mm. Moreover, the wall thickness of the water supply pipes, depending on the manufacturer, can range from 2.5 to 3.2 mm.
[0006] At the end of the irrigation machine, the volume of water transported for irrigation decreases. To reduce its weight and metal consumption, the water supply pipeline is designed with a variable cross-section. Typically, the machine's pipeline consists of two sections with different diameters of the water supply pipes, with the first section, located at the beginning of the machine, made of pipes with a larger cross-section.
[0007] In pivot irrigation machines used to irrigate large fields (over 100 hectares), the first section of the machine's water supply pipeline is made of pipes measuring Ø177.8 mm, Ø193 mm, Ø203 mm, Ø219 mm, or Ø254 mm. Truss spans equipped with such pipes are shorter and heavier. Increasing the number of such spans in the pivot irrigation machine increases its weight and metal consumption, increases the number of self-propelled carts, increases the energy consumption for moving the machine across the field, and leads to a greater loss of irrigated area for the track. Therefore, finding theoretically sound methods for optimizing the length of the first section of the water supply pipeline in a pivot irrigation machine is a pressing issue.
[0008] It should be noted that for low-pressure sprinkler pipelines, the recommended average water velocity is ν ≤ 3.5 m / s [3]. In circular pipelines, the water velocity at the center of the pipe will be greatest, while at the walls it will be virtually zero. Therefore, for water pipelines, it is customary to determine the average water velocity. Foreign manufacturers define the maximum throughput of low-pressure sprinkler pipelines at an average water flow velocity of 3.5 m / s [4, 5, 6]. Exceeding the recommended average flow velocity leads to a sharp increase in hydraulic resistance and significant energy losses. In this case, even a slight increase in the machine's length or irrigation radius will require a significant increase in the pressure at the machine inlet.Moreover, from a practical point of view, high pressure at the machine inlet is justified only for the purpose of compensating for pressure in the presence of elevation changes in the irrigated area.
[0009] A method for assembling a water supply pipeline for the low-pressure circular irrigation machine "Kuban-LK1" is known (Electric circular irrigation machine "Kuban-LK1". Operation manual. Part 2. SKB DM "Dozhd", 1991.– prototype), including the selection of the irrigation radius of the sprinkler machine, which is carried out taking into account the geometric parameters of the field, and the subsequent determination of the irrigation area, then, based on the analysis of the soil and climatic characteristics of the irrigated area and the permissible rain intensity, the value of the supply hydromodule is established, after which the required water flow is determined, then, taking into account the irrigation radius, the length and composition of the machine are selected, while the water supply pipeline of the machine is formed from pipelines of truss spans, which are successively hinged to each other, also the outer span of the machine is additionally equipped with a console, which is equipped with an end long-range jet apparatus or sprinkler, and the first section of the water supply pipeline of the machine is formed from truss spans equipped with a pipeline made of pipes with an external diameter. and wall thickness , and the second section of the machine's water supply pipeline is formed from truss spans equipped with a pipeline made of pipes with an external diameter and wall thickness , wherein the working cross-section of the first section of the water supply pipeline of the machine is made larger than the working cross-section of its second section, while = 203 mm and = 2.65 mm, and = 168 mm and = 2.65 mm, and the length of the first section of the water supply pipeline is performed depending on the total number of truss spans in the sprinkler machine, so, for example, if the machine has from 4 to 7 spans, then the length of the first section of the water supply pipeline is equal to the length of the first span of 38.7 m, and in machines containing from 8 to 13 spans, the length of the first section of the water supply pipeline increases with the increase in the number of spans in the machine according to a straight-line relationship, while the length of the second section of the pipeline does not change and remains equal to 292.2 m (sheet 18, table “Composition of machine modifications by trusses and lengths” [7]).
[0010] It should also be noted that the Kuban-LK1 irrigation machine utilizes two truss span designs, differing in both length and water supply pipeline diameter. The initial section of the machine utilizes short 38.5 m spans with a 203 x 2.65 mm diameter pipeline, while the end section utilizes 48.7 m spans with a 168 x 2.65 mm diameter pipeline [7, 8].
[0011] The disadvantages of the prototype are as follows.
[0012] Using a short section of Ø203x2.65 mm pipeline made from a single truss span at the start of machines with an irrigation radius of up to 370 m is excessive and does not make rational sense; the presence of this section of pipeline leads to an increase in the weight and metal consumption of the machine, and also increases the number of supporting self-propelled trolleys.
[0013] The proposed prototype method for arranging the water supply pipeline of a pivot irrigation machine does not allow for the full utilization of the 203x2.65 mm diameter pipeline's capacity, which, when operating in low-pressure mode, can reach up to 106 l / s [6]. To achieve this water flow rate, the first section of the machine's water supply pipeline must be longer.
[0014] Also, the table specified in the prototype description, on the basis of which the lengths of the sections of the water supply pipeline are calculated, is not applicable to pivot irrigation machines with other dimensional characteristics of the spans and with other parameters of the water supply pipeline.
[0015] In the prototype, the irrigation intensity of the irrigation machine is not taken into account when designing the sections of the water supply pipeline. The irrigation intensity is measured by the flow rate. The flow rate is the volume of water supplied per unit of irrigated area per unit of time, i.e., the specific water flow rate. Moreover, the higher the flow rate, the greater the water flow rate required to draw from the machine's pipeline for the same irrigation radius. Accordingly, the greater the required water flow rate, the longer the first section of the machine's water supply pipeline should be. Therefore, the flow rate, the irrigation radius, and the maximum permissible average water velocity (ν = 3.5 m / s) will significantly influence the layout of the water supply pipeline of a low-pressure pivot irrigation machine.In this prototype, the first section of the water supply pipeline increases with the increase in the number of spans in the machine according to a straight-line relationship; this approach to the arrangement of the water supply belt leads to an increase in the weight and metal content of the machine and does not allow for the full use of the pipeline's throughput capacity.
[0016] The value of the supply hydromodulus is established based on the analysis of the soil and climatic characteristics of the irrigated area and the permissible intensity of artificial rain. In this case, the intensity of artificial rain should be comparable with the rate of moisture absorption by the soil. If the artificial rain intensity is excessive, the water does not have time to be absorbed and accumulates on the soil surface, forming puddles and then runoff, which leads to soil erosion and thinning of the fertile layer. The problem of high intensity of artificial rain is especially relevant for long pivot irrigation machines with a high value of the supply hydromodulus. The rain intensity equal to the rate of water absorption into the soil is called permissible [9]. A. N. Kostyakov determined the permissible intensity based on the mechanical composition of soil: for heavy soils 0.1-0.2 mm / min; medium 0.2-0.3 mm / min; light 0.3-0.8 mm / min [9].
[0017] Furthermore, one of the operating characteristics of a pivot irrigation machine is that its self-propelled carts travel different distances as the machine travels around the circle. The farther the self-propelled cart is from the fixed support, the greater the distance traveled. Also, the farther the self-propelled cart is from the machine's center of rotation (the fixed support), the greater the number of electric drive activations per circle. Therefore, in pivot irrigation machines, the operating time of the self-propelled cart drive is unevenly distributed, and the closer the self-propelled cart is to the machine's center of rotation, the lower the operating time of its drive. Moreover, truss spans of different lengths can be used to form the first and / or second sections of the machine's water supply pipeline.Moreover, longer truss spans are heavier, and when the machine is moving, the electric drive of such spans experiences greater overload, leading to accelerated wear of the drive components. Therefore, the most rational solution is to place longer and heavier truss spans at the beginning of each section of the machine's water supply pipeline; this will increase the service life of the self-propelled bogie drive.
[0018] The objective of the invention is to optimize the length of the first section of the water supply pipeline of the machine depending on the required irrigation intensity, which will ensure the required water flow and will reduce the weight and metal consumption of the machine, as well as increase the service life of the drive of self-propelled carts due to the rational arrangement of truss spans in the machine.
[0019] The stated task is achieved in that in the method of assembling the water supply pipeline of a low-pressure pivot irrigation machine with a truss span structure, including the selection of the irrigation radius of the irrigation machine, which is carried out taking into account the geometric parameters of the field, the subsequent determination of the irrigation area, the analysis of the soil and climatic characteristics of the irrigated area and the determination of the permissible rain intensity, on the basis of which the value of the supply hydraulic module is established, after which the required water flow rate is determined, then, taking into account the irrigation radius, the length and composition of the machine are selected, while the water supply pipeline of the machine is formed from pipelines of truss spans, which are successively hinged to each other, also the outer span of the machine is additionally provided with a console, which is equipped with an end long-range device or sprinkler, and the first section of the water supply pipeline of the machine is formed from truss spans,equipped with a pipeline made of pipes with an external diameter, and wall thickness , and the second section of the machine's water supply pipeline is formed from truss spans equipped with a pipeline made of pipes with an external diameter and wall thickness , wherein the working cross-section of the first section of the water supply pipeline of the machine is made larger than the working cross-section of its second section, where, according to the invention, the first section of the water supply pipeline of the machine is made with a length determined using the following expression:
[0020] ,
[0021] where – length of the first section of the machine’s water supply pipeline, m;
[0022] – the number of truss spans that make up the first section of the machine’s water supply pipeline, pcs.;
[0023] – the serial number of the truss span equipped with a pipeline made of pipes with an external diameter and wall thickness ;
[0024] – length of the i-th truss span, m;
[0025] – the distance between the center of rotation of the irrigation machine and the center of the hinge joint of the first truss span with the rotary knee of the fixed support, m;
[0026] – outer diameter of the pipes of the second section of the water supply pipeline of the machine, m;
[0027] – thickness of the wall of the pipes of the second section of the water supply pipeline of the machine, m;
[0028] – supply hydraulic module, l / (s ha);
[0029] – irrigation radius of the sprinkler machine, m;
[0030] – the maximum value of the average water velocity recommended for low-pressure irrigation machine pipelines, m / s, ( m / s);
[0031] in addition, when forming the first section of the water supply pipeline of the machine from truss spans of different lengths, the longest truss spans are placed at the beginning of the first section of the water supply pipeline of the machine.
[0032] When using three or more standard sizes of truss spans that differ in length to form the first section of the water supply pipeline of the machine, the arrangement of the truss spans, when forming the first section of the water supply pipeline of the machine, is carried out from the beginning of the first section of the water supply pipeline of the machine in order of decreasing their length in the direction of the end part of the sprinkler machine.
[0033] When forming the first section of the water supply pipeline of the machine, priority is given to such a composition of truss spans intended for this section of the water supply pipeline of the machine, in which the first section of the water supply pipeline of the machine will have the shortest length with the minimum number of truss spans used to form the first section of the water supply pipeline of the machine.
[0034] When forming the second section of the water supply pipeline of the machine from truss spans of different lengths, the longest truss spans are placed at the beginning of the second section of the water supply pipeline of the machine.
[0035] When using three or more standard sizes of truss spans that differ in length to form the second section of the water supply pipeline of the machine, the arrangement of the truss spans, when forming the second section of the water supply pipeline of the machine, is carried out from the beginning of the second section of the water supply pipeline of the machine in order of decreasing their length in the direction of the end part of the sprinkler machine.
[0036] The length of the second section of the water supply pipeline of the machine is selected in such a way that the outer span of the machine can be equipped with a console with an end long-range jet device or sprinkler, having the largest possible width of rain capture in the direction of movement of the machine.
[0037] The console is equipped with an end-range jet device with a range of 15 to 39.5 m, which is fed from a booster pump through a parallel pipeline located along the console pipeline, while the booster pump is installed at the end of the second section of the machine's water supply pipeline.
[0038] The console is equipped with an end sprinkler with a range of 9.5 to 16.9 m, which is fed from a booster pump through a parallel pipeline located along the console pipeline, while the booster pump is installed at the end of the second section of the machine's water supply pipeline.
[0039] The differences between the proposed method and the prototype are as follows.
[0040] In the proposed method, the length of the machine's first section of water supply pipeline is determined based on the feeder hydraulic capacity, the irrigation radius, and the maximum permissible average water velocity of ν = 3.5 m / s for low-pressure irrigation machine pipelines. Moreover, the feeder hydraulic capacity is a specific characteristic of water flow, expressed in l / (s ha), which is also an indicator of irrigation intensity. In pivot irrigation machines with a variable cross-section of the water supply belt, optimizing the length of the first section of the water supply pipeline reduces the machine's weight and metal consumption while ensuring the required water flow rate for irrigation.
[0041] In the proposed method, each section of the machine's water supply pipeline can be formed from truss spans of varying lengths, allowing for more precise matching of the irrigation machine's length to the size of the area being irrigated. Moreover, when using truss spans of varying lengths to form the first and / or second sections of the machine's water supply pipeline, it is recommended to place the longest and heaviest truss spans at the beginning of each pipeline section. This solution will increase the service life of the self-propelled cart drive, since the closer the longest and heaviest truss spans are to the fixed support, the shorter the distance traveled by the self-propelled carts during the irrigation machine's rotation.
[0042] Furthermore, it is recommended that the length of the machine's second water supply pipeline be selected so that the outer span of the machine can be equipped with a cantilever with the widest possible rainfall coverage in the direction of machine travel. Equipping the irrigation machine with a cantilever and an end-of-range jet device, fed by a booster pump via a parallel pipeline located along the cantilever pipeline, will increase the irrigation radius and reduce the number of truss spans in the machine, which will also contribute to a reduction in the machine's weight and metal requirements.
[0043] The method for arranging the water supply pipeline of a low-pressure circular irrigation machine with a truss span structure is explained with graphic materials.
[0044] Fig. 1 shows a diagram for determining the length of the first section of the water supply pipeline of a low-pressure pivot irrigation machine, where:
[0045] – irrigation radius of the sprinkler machine, m;
[0046] – length of the irrigation machine, m;
[0047] – length of the first section of the machine’s water supply pipeline, m;
[0048] – the length of the second section of the machine’s water supply pipeline, m;
[0049] – console length, m;
[0050] – the operating range of the end long-range jet apparatus or sprinkler, m;
[0051] Fig. 2 shows a diagram of the articulated connection of the first span of the machine with the rotary knee of the fixed support, side view, where:
[0052] – the distance between the center of rotation of the irrigation machine and the center of the hinge joint of the first span with the rotary knee of the fixed support, m;
[0053] Fig. 3 shows the circular irrigation machine “Cascade 125T”, in which the first section of the water supply pipeline is formed from truss spans of different lengths, side view, where:
[0054] – length of the irrigation machine, m;
[0055] – length of the first section of the machine’s water supply pipeline, m;
[0056] – the length of the second section of the machine’s water supply pipeline, m;
[0057] – console length, m;
[0058] Fig. 4 shows the circular irrigation machine “Cascade 125T”, in which three standard sizes of truss spans, differing in length, were used to form the first section of the water supply pipeline, side view, where:
[0059] – length of the irrigation machine, m;
[0060] – length of the first section of the machine’s water supply pipeline, m;
[0061] – the length of the second section of the machine’s water supply pipeline, m;
[0062] – console length, m;
[0063] Fig. 5 shows the circular irrigation machine “Cascade 125T”, in which the second section of the water supply pipeline is formed from truss spans of different lengths, side view, where:
[0064] – length of the irrigation machine, m;
[0065] – length of the first section of the machine’s water supply pipeline, m;
[0066] – the length of the second section of the machine’s water supply pipeline, m;
[0067] – console length, m;
[0068] Fig. 6 shows the circular irrigation machine “Cascade 125T”, in which three standard sizes of truss spans, differing in length, were used to form the second section of the water supply pipeline, side view, where:
[0069] – length of the irrigation machine, m;
[0070] – length of the first section of the machine’s water supply pipeline, m;
[0071] – the length of the second section of the machine’s water supply pipeline, m;
[0072] – console length, m;
[0073] Fig. 7 shows the console of the “Cascade 125T” irrigation machine, which is equipped with an end long-range jet device, fed from a booster pump through a parallel pipeline, side view;
[0074] Fig. 8 shows the console of the “Cascade 125T” irrigation machine, which is equipped with an end sprinkler fed from a booster pump via a parallel pipeline, side view;
[0075] Fig. 9 shows a photograph of the console and the outer self-propelled trolley of the “Cascade 125T” irrigation machine;
[0076] Fig. 10 shows graphs of the dependence of the length of the first section of the water supply pipeline on the irrigation radius of the sprinkler machine and the value of the supply hydraulic module, made for the low-pressure circular sprinkler machine “Cascade 125T”.
[0077] The proposed method was developed as part of the development of the low-pressure pivot irrigation machine "Kaskad 125T," which features a variable-section water supply belt. Irrigation machines of the "Kaskad" family are developed at the Saratov State University of Genetics, Biotechnology, and Engineering named after N.I. Vavilov and have been in serial production since 2017. The wide-coverage pivot machines of the "Kaskad 125T" series are designed for irrigating large areas and are capable of delivering a water flow rate of up to 125 l / s when operating in low-pressure mode. The following examples will take into account the design features of the "Kaskad 125T" irrigation machines.
[0078] The low-pressure pivot irrigation machine consists of a water supply pipeline moving around a fixed support 1, formed from pipelines of truss spans 2, which are successively pivotally connected to each other (Fig. 1). Each truss span 2 is equipped with a self-propelled trolley 3, equipped with an electric drive and support pneumatic wheels. The drive of the self-propelled trolley 3 is an electric gear motor, which drives two worm-type wheel reducers located at the edges of the self-propelled trolley 3.
[0079] The outer truss span 2 of the irrigation machine is additionally equipped with a console 4, which is fitted with an end-of-range jet device or sprinkler. Equipping the irrigation machine with a console 4 allows for an increased irrigation radius.
[0080] In the pivot irrigation machine "Cascade 125T", the design of the console 4 has a cable-stayed suspension, and the length of the console 4 can be: 6 m; 12 m; 18 m; 24 m; 27 m; 30 m; 31 m.
[0081] In a pivot irrigation machine, the first truss span 2 has a hinged connection 5 with a rotary elbow 6 of the fixed support 1 (Fig. 2). Moreover, the hinged connection 5 of the rotary elbow 6 and the first span 2 is at a certain distance from the center of rotation of the machine. For example, in the Kaskad 125T irrigation machine, the distance between the center of rotation of the irrigation machine and the center of the hinged connection 5 of the first span 2 with the rotary elbow 6 is 700 mm, that is, = 0.7 m.
[0082] At the end of the irrigation machine, the volume of water transported for irrigation is reduced. To reduce its weight and metal consumption, the water supply pipeline is designed with a variable cross-section. Typically, the machine's pipeline consists of two sections with different diameters, with the first section, located at the beginning of the machine, made of pipes with a larger cross-section. Each section of the machine's water supply pipeline can be formed from 2 truss spans of different lengths. Using 2 truss spans of different lengths in the irrigation machine allows for more precise matching of the machine's length to the size of the area to be irrigated.
[0083] Another characteristic of a pivot irrigation machine is that as the machine moves around the circle, its self-propelled carts 3 travel different distances. The further a self-propelled cart 3 is from the fixed support 1, the greater the distance traveled. In pivot irrigation machines, the operating time of the self-propelled carts 3 is unevenly distributed, and the closer a self-propelled cart 3 is to the machine's center of rotation, the lower the operating time of its drive. Furthermore, longer truss spans 2 are heavier, and when the machine moves, the electric drive of such spans 2 experiences greater overloads, leading to accelerated wear of the drive components. Therefore, when using truss spans 2 of different lengths to form the first and / or second section of the machine's water supply pipeline, it is recommended to place the longest and heaviest truss spans 2 at the beginning of each section of the pipeline.This solution will increase the service life of the drive of the self-propelled carts 3, since the closer to the fixed support 1 the longest and heaviest truss spans 2 are located, the shorter the distance their self-propelled carts 3 travel when the irrigation machine passes in a circle.
[0084] In pivot irrigation machines used to irrigate fields over 100 hectares, the first section of the machine's water supply pipeline is made of pipes measuring Ø177.8 mm, Ø193 mm, Ø203 mm, Ø219 mm, or Ø254 mm. Truss spans 2 equipped with such pipes are shorter and heavier. Increasing the number of such spans 2 in the pivot irrigation machine increases its weight and metal consumption, as well as the number of self-propelled carts 3, which increases the energy consumption for moving the machine across the field and leads to a greater alienation of the irrigated area for the track. Therefore, optimizing the length of the first section of the pivot irrigation machine's water supply pipeline is a pressing issue.
[0085] The length of a pivot irrigation machine with a variable cross-section of the water supply belt can be determined by the formula:
[0086] , (1)
[0087] where – length of the circular irrigation machine, m;
[0088] – length of the first section of the machine’s water supply pipeline, m;
[0089] – the length of the second section of the machine’s water supply pipeline, m;
[0090] – console length, m.
[0091] The irrigation radius of the sprinkler machine is determined as follows:
[0092] , (2)
[0093] where – irrigation radius of the sprinkler machine, m;
[0094] – the operating range of the end long-range jet device or sprinkler, m.
[0095] The irrigation area of the pivot irrigation machine will be:
[0096] , (3)
[0097] where – irrigation area of a pivot irrigation machine, ha;
[0098] – the number Pi.
[0099] Taking into account the size of the supply hydraulic module, the water consumption of a pivot irrigation machine can be determined using the formula:
[0100] , (4)
[0101] where – water consumption of a circular irrigation machine, l / s;
[0102] – supply hydraulic module, l / (s ha).
[0103] Next, we determine the maximum throughput of the second section of the machine's water supply pipeline, which is achieved at the maximum recommended value of the average water flow velocity:
[0104] , (5)
[0105] where – maximum capacity of the second section of the machine’s water supply pipeline, l / s;
[0106] – the working cross-sectional area of the second section of the machine’s water supply pipeline, m 2 ;
[0107] – the maximum value of the average water velocity recommended for low-pressure irrigation machine pipelines, m / s. In this case, m / s
[0108] The working cross-sectional area of the second section of the machine’s water supply pipeline is determined by the formula:
[0109] , (6)
[0110] where – outer diameter of the pipes of the second section of the water supply pipeline of the machine, m;
[0111] – thickness of the wall of the pipes of the second section of the water supply pipeline of the machine, m.
[0112] By substituting expression (6) into formula (5), we obtain:
[0113] . (7)
[0114] The weight and metal consumption of a pivot irrigation machine can be reduced by minimizing the length of the first section of the machine's water supply pipeline.
[0115] With the minimum possible length of the first section of the machine's water supply pipeline, the second section should not exceed the maximum average water flow rate recommended for low-pressure sprinkler pipelines. Furthermore, the shorter the first section of the water supply pipeline, the less water is withdrawn from it for irrigation.
[0116] The minimum water flow rate taken for irrigation from the first section of the machine's water supply pipeline, with its minimum possible length, will be:
[0117] , (8)
[0118] where – the minimum water consumption taken for irrigation from the first section of the machine’s water supply pipeline, with its minimum possible length, l / s.
[0119] During irrigation, the first section of the machine's water supply pipeline irrigates the portion of the field over which it moves. Accordingly, the shorter the length of the first section of the machine's water supply pipeline, the smaller the area it will irrigate.
[0120] With the minimum possible length of the first section of the machine's water supply pipeline, this section of the pipeline will irrigate the smallest area, which can be determined by the formula:
[0121] , (9)
[0122] where – minimum area irrigated by the first section of the machine’s water supply pipeline, ha;
[0123] – minimum length of the first section of the machine’s water supply pipeline, m.
[0124] Taking into account the size of the feed hydraulic module, the minimum water flow taken for irrigation from the first section of the machine's water supply pipeline can be determined as follows:
[0125] . (10)
[0126] By substituting expression (9) into formula (10), we obtain:
[0127] , (11)
[0128] Next, using formulas (8) and (11) we can write the following equality:
[0129] , (12)
[0130] where can you determine the minimum length of the first section of the machine's water supply pipeline:
[0131] , (13)
[0132] then substituting expressions (4) and (7) into formula (13) we obtain:
[0133] , (14)
[0134] After transforming expression (14), the formula for determining the minimum length of the first section of the water supply pipeline of the machine will take the following form:
[0135] . (15)
[0136] However, the truss spans that form the sections of the irrigation machine's water supply pipeline have a fixed length. Moreover, several truss span sizes of varying lengths can be used to form the first section of the machine's water supply pipeline. For example, in the "Cascade 125T" irrigation machine, truss spans equipped with a pipeline made of Ø219x3 mm pipes are used to form the first section of the machine's water supply pipeline. These spans can be 42.1 m, 47.9 m, or 53.7 m long.
[0137] Thus, the length of the first section of the water supply pipeline of the machine can be written as follows:
[0138] , (16)
[0139] where – length of the first section of the machine’s water supply pipeline, m;
[0140] – the number of truss spans that make up the first section of the machine’s water supply pipeline, pcs.;
[0141] – the serial number of the truss span equipped with a pipeline made of pipes with an external diameter and wall thickness ;
[0142] – length of the i-th truss span, m;
[0143] – the distance between the center of rotation of the irrigation machine and the center of the hinge joint of the first truss span with the rotary knee of the fixed support, m.
[0144] For the irrigation machine "Cascade 125T" = 0.7 m.
[0145] Moreover, the water consumption required for irrigation will be ensured if the following condition is met:
[0146] . (17)
[0147] In a special case , but for most cases However, increasing the length of the first section of the machine's water supply pipeline by increasing the number of truss spans leads to an increase in the weight and metal requirements of the irrigation machine. The optimal length of the first section of the water supply pipeline will be achieved when the following condition is met:
[0148] . (18)
[0149] Using formulas (16) and (15), as well as inequalities (17) and (18), the expression for determining the length of the first section of the water supply pipeline of the machine will take the following form:
[0150] . (19)
[0151] Thus, the optimal length of the first section of the water supply pipeline of the machine will depend on the irrigation radius of the sprinkler machine, the size of the supply hydraulic module and the maximum value of the average water velocity ( m / s), which is recommended for low-pressure irrigation machine pipelines.
[0152] It should also be noted that in the Cascade 125T irrigation machine, the second section of the water supply pipeline is formed from truss spans equipped with a pipeline made of Ø159x3 mm pipes, and these spans can have a length of 59.5 m or 65.25 m or 71.05 m.
[0153] In addition, in cases where it is necessary to reduce the pressure at the inlet of the machine, the following condition must be met:
[0154] . (20)
[0155] The method for arranging the water supply pipeline of a low-pressure circular irrigation machine with a truss span structure is as follows.
[0156] Based on the field's geometric parameters, the irrigation radius of the sprinkler is selected and then the irrigation area is calculated. The irrigation area is calculated using formula (3).
[0157] Next, based on an analysis of the soil and climate characteristics of the irrigated area and the permissible rainfall intensity, the supply hydraulic module is determined, after which the required water flow rate is determined. Formula (4) is used to determine the water flow rate of a pivot irrigation machine.
[0158] Then, taking into account the irrigation radius, the length and composition of the machine are selected. The machine's water supply pipeline is formed from truss spans, which are successively connected to each other by hinges. The outer span of the machine is also additionally equipped with a console, which is equipped with an end-firing device or sprinkler. Moreover, the first section of the machine's water supply pipeline is formed from truss spans equipped with a pipeline made of pipes with an outer diameter of and wall thickness . And the second section of the machine's water supply pipeline is formed from truss spans equipped with a pipeline made of pipes with an external diameter and wall thickness In this case, the working cross-section of the first section of the machine's water supply pipeline is made larger than the working cross-section of its second section. Furthermore, the first section of the machine's water supply pipeline is made with a length determined using expression (19):
[0159] ,
[0160] where – length of the first section of the machine’s water supply pipeline, m;
[0161] – the number of truss spans that make up the first section of the machine’s water supply pipeline, pcs.;
[0162] – the serial number of the truss span equipped with a pipeline made of pipes with an external diameter and wall thickness ;
[0163] – length of the i-th truss span, m;
[0164] – the distance between the center of rotation of the irrigation machine and the center of the hinge joint of the first truss span with the rotary knee of the fixed support, m;
[0165] – outer diameter of the pipes of the second section of the water supply pipeline of the machine, m;
[0166] – thickness of the wall of the pipes of the second section of the water supply pipeline of the machine, m;
[0167] – supply hydraulic module, l / (s ha);
[0168] – irrigation radius of the sprinkler machine, m;
[0169] – the maximum value of the average water velocity recommended for low-pressure irrigation machine pipelines, m / s, ( m / s).
[0170] Thus, the first section of the water supply pipeline of the machine is made with a length determined taking into account the irrigation radius of the sprinkler machine, the value of the supply hydraulic module and the maximum value of the average speed of water movement ( m / s), which is recommended for low-pressure irrigation pipelines. Moreover, the flow rate is an indicator of irrigation intensity. The flow rate is the volume of water supplied per unit of irrigated area per unit of time.
[0171] In addition, when forming the first section of the water supply pipeline of the machine from truss spans of different lengths, the longest truss spans are placed at the beginning of the first section of the water supply pipeline of the machine (Fig. 3).
[0172] When using three or more standard sizes of truss spans that differ in length to form the first section of the water supply pipeline of the machine, the arrangement of the truss spans, when forming the first section of the water supply pipeline of the machine, is carried out from the beginning of the first section of the water supply pipeline of the machine in order of decreasing their length in the direction of the end part of the sprinkler machine (Fig. 4).
[0173] Also, when forming the first section of the water supply pipeline of the machine, priority is given to such a composition of truss spans intended for this section of the water supply pipeline of the machine, in which the first section of the water supply pipeline of the machine will have the shortest length with the minimum number of truss spans used to form the first section of the water supply pipeline of the machine.
[0174] The problem is that when using several truss span sizes of varying lengths to form the first section of the machine's water supply pipeline, expression (19) will have multiple solutions. Priority should be given to the solution that ensures the shortest first section of the machine's water supply pipeline with the minimum number of truss spans used to form the first section of the machine's water supply pipeline. This approach will not only reduce the machine's weight and metal consumption, but also reduce the number of self-propelled carts, which will lower the energy consumption for moving the machine across the field and reduce the loss of irrigated land due to track alignment.
[0175] For example, in the sprinkler machine “Cascade 125T” with an irrigation radius of 700 m, with a supply hydraulic module of 0.81 l / (s ha), the minimum length of the first section of the water supply pipeline of the machine should be = 486.95 m. In this case, expression (19) will have several of the following solutions (at = 0.7 m).
[0176] In the first variant, the length of the first section of the water supply pipeline of the machine will be = 491.3 m. In this case, the first section of the machine’s water supply pipeline will consist of two truss spans of 53.7 m in length and eight truss spans of 47.9 m in length (ten spans in total).
[0177] In the second option, the length of the first section of the water supply pipeline of the machine will be = 505.9 m. In this case, the first section of the machine’s water supply pipeline will consist of twelve truss spans 42.1 m long (twelve spans in total).
[0178] In the third variant, the length of the first section of the water supply pipeline of the machine will be = 492.8 m. In this case, the first section of the machine’s water supply pipeline will consist of five truss spans of 47.9 m in length and six truss spans of 42.1 m in length (eleven spans in total).
[0179] In the fourth variant, the length of the first section of the water supply pipeline of the machine will be = 491.3 m. In this case, the first section of the machine’s water supply pipeline will consist of six truss spans of 53.7 m in length and four truss spans of 42.1 m in length (ten spans in total).
[0180] In the fifth variant, the length of the first section of the water supply pipeline of the machine will be = 497.1 m. In this case, the first section of the machine’s water supply pipeline will consist of four truss spans of 53.7 m in length, five truss spans of 47.9 m in length, and one truss span of 42.1 m in length (a total of ten spans).
[0181] In the sixth variant, the length of the first section of the water supply pipeline of the machine will be = 491.3 m. In this case, the first section of the machine’s water supply pipeline will consist of four truss spans of 53.7 m in length, four truss spans of 47.9 m in length, and two truss spans of 42.1 m in length (a total of ten spans).
[0182] In the example considered, the priority decisions will be the first, fourth and sixth options, in which = 491.3 m when using ten truss spans, in the specified options the optimal length of the first section of the machine's water supply pipeline will be achieved.
[0183] When forming the second section of the water supply pipeline of the machine from truss spans of different lengths, the longest truss spans are placed at the beginning of the second section of the water supply pipeline of the machine (Fig. 4, 5).
[0184] When using three or more standard sizes of truss spans that differ in length to form the second section of the water supply pipeline of the machine, the arrangement of the truss spans, when forming the second section of the water supply pipeline of the machine, is carried out from the beginning of the second section of the water supply pipeline of the machine in order of decreasing their length in the direction of the end part of the sprinkler machine (Fig. 6).
[0185] In addition, the length of the second section of the water supply pipeline of the machine is selected in such a way that the outer span of the machine can be equipped with a console with an end long-range jet device or sprinkler, having the largest possible width of capture of rain in the direction of movement of the machine.
[0186] Moreover, the width of the console’s rain capture in the direction of the machine’s movement is determined as the sum of the console’s length and the range of the end long-range jet apparatus or sprinkler ( ).
[0187] The console design of the Kaskad 125T irrigation machine has the following length options: 6 m; 12 m; 18 m; 24 m; 27 m; 30 m; 31 m. Moreover, if the boundaries of the irrigated area allow, then priority should be given to installing the console that has the greatest width of capture of rain in the direction of movement of the machine.
[0188] For example, if the sprinkler machine “Cascade 125T” with an irrigation radius of 579 m has the first section of the water supply pipeline made 288.1 m long (six spans of 47.9 m, at = 0.7 m; = 0.81 l / (s ha)), then the remaining part of the machine should provide a rain coverage width in the direction of machine movement equal to 290.9 m. In this case, it is most rational to make the second section of the machine's water supply pipeline 238 m long (four spans of 59.5 m each), and on the outer span of the machine, install a 27 m long console equipped with an end long-range jet device with a range of 25.9 m. In this case, the console will have a rain coverage width in the direction of machine movement equal to 52.9 m.
[0189] Equipping a pivot irrigation machine with a console with a long-range end-of-range device increases the irrigation area without increasing the number of truss spans in the machine, which in turn reduces the machine's weight and metal requirements. Also, in some cases, installing a console with a long-range end-of-range device reduces the number of truss spans and self-propelled carts in the machine, which in turn reduces the loss of irrigated land to track tracks.
[0190] The console is equipped with an end long-range jet device with a range of 15 to 39.5 m, which is fed from a booster pump through a parallel pipeline located along the console pipeline, while the booster pump is installed at the end of the second section of the water supply pipeline of the machine (Fig. 7).
[0191] For example, the console can be equipped with R25S, SR75, or P85A long-range sector-action end-of-range jetters. The P85A end-of-range jetter has a range of 15 to 24 m, while the R25S end-of-range jetter has a range of 18 to 39.5 m. A booster pump, generating a pressure of 2 to 6 atm, is used to supply water to the end-of-range jetter.
[0192] In another embodiment, the console is equipped with an end sprinkler with a range of 9.5 to 16.9 m, which is fed from a booster pump through a parallel pipeline located along the console pipeline, while the booster pump is installed at the end of the second section of the water supply pipeline of the machine (Fig. 8).
[0193] For example, the console can be equipped with AXIS-II or R55VT (Nelson) end-of-run sprinklers. The AXIS-II end-of-run sprinkler has a throw range of 9.5 to 16.2 m, while the R55VT end-of-run sprinkler has a throw range of 12.2 to 16.9 m. A booster pump, generating pressure from 1.5 to 4 atm, is used to power the end-of-run sprinkler.
[0194] The proposed method for arranging a water supply pipeline was implemented in a low-pressure circular irrigation machine “Cascade 125T” (Fig. 9), which has a variable cross-section of the water supply belt.
[0195] To facilitate the selection of the "Cascade 125T" sprinkler system and the layout of its water supply pipeline, graphs were constructed using formula (15) to show the dependence of the minimum length of the first section of the machine's water supply pipeline on the irrigation radius and the supply hydraulic module (Fig. 10). A table was also compiled for the "Cascade 125T" sprinkler system, indicating the maximum irrigation radius and the maximum irrigation area depending on the irrigation intensity.
[0196] Using the proposed method will optimize the length of the machine's first water supply pipeline, which in turn will reduce the weight and metal requirements of the irrigation machine while ensuring the required water flow rate. Furthermore, the rational arrangement of the truss spans in the irrigation machine will increase the service life of the self-propelled cart drive.
[0197] Table 1 shows the maximum irrigation radius and maximum irrigation area for the low-pressure pivot irrigation machine “Cascade 125T” depending on the irrigation intensity (see the graphic section).
[0198] Examples of the method implementation.
[0199] For the convenience of demonstrating the proposed method, in each of the examples we will specify the geometric parameters of the irrigated area and the value of the feed hydromodule.
[0200] We will consider the implementation of this method using the example of a low-pressure circular irrigation machine “Cascade 125T”, which has a variable cross-section of the water supply belt.
[0201] Design features of the circular irrigation machine "Cascade 125T":
[0202] – the first section of the machine’s water supply pipeline is formed from truss spans equipped with a Ø219x3 mm pipeline;
[0203] – the second section of the machine’s water supply pipeline is formed from truss spans equipped with a Ø159x3 mm pipeline;
[0204] – truss spans equipped with Ø219x3 pipeline can have the following length: 42.1 m; 47.9 m; 53.7 m;
[0205] – truss spans equipped with Ø159x3 pipeline can have the following length: 59.5 m; 65.25 m; 71.05 m;
[0206] – the console design has the following length options: 6 m; 12 m; 18 m; 24 m; 27 m; 30 m; 31 m;
[0207] – the distance between the center of rotation of the irrigation machine and the center of the hinge joint of the first span with the rotary knee of the fixed support is 0.7 m;
[0208] – the console is equipped with an end-mounted long-range jet device with a range of 15 to 39.5 m;
[0209] – the console is equipped with an end sprinkler with a range of 9.5 to 16.9 m.
[0210] Thus, for the irrigation machine "Cascade 125T": = 0.219 m; = 0.003 m; = 0.159 m; = 0.003 m; = 0.7 m.
[0211] Example of implementation of method No. 1.
[0212] Implementation of the layout of the water supply pipeline of the sprinkler machine "Cascade 125T" for irrigation of a square area with dimensions of 1400x1400 m, with the size of the supply hydraulic module = 0.81 l / (s ha).
[0213] To irrigate an area of 1400x1400 m, the irrigation radius of the sprinkler machine should be = 700 m.
[0214] The irrigation area will be = 153.94 hectares.
[0215] With a supply hydraulic module of 0.81 l / (s ha), the water consumption of the irrigation machine will be = 124.69 l / s.
[0216] Next, using expression (19), we determine the length of the first section of the machine’s water supply pipeline.
[0217] In this case, knowing the irrigation radius and the value of the feed hydraulic module, the minimum length of the first section of the water supply pipeline of the machine can be established using expression (15) or using the graph (Fig. 10), in this case it will be = 486.95 m.
[0218] Taking into account the possible lengths of truss spans equipped with a Ø219x3 mm pipeline, and according to expression (19), the length of the first section of the water supply pipeline will be = 491.3 m. In this case, the first section of the machine’s water supply pipeline will consist of two truss spans of 53.7 m in length and eight truss spans of 47.9 m in length.
[0219] According to the proposed method, when forming the first section of the water supply pipeline of the machine, the arrangement of truss spans is carried out in the following order:
[0220] – the first and second spans in the machine are truss spans of 53.7 m long, equipped with a Ø219x3 mm pipeline;
[0221] – from the third to the tenth span of the machine, truss spans 47.9 m long are installed, equipped with a Ø219x3 mm pipeline.
[0222] If the irrigation radius of a sprinkler machine is 700 m and the length of the first section of the machine's water supply pipeline is 491.3 m, the remaining part of the machine should ensure a rain capture width in the direction of machine movement equal to 208.7 m. In this case, the most rational way to make the second section of the machine's water supply pipeline is to make it 142.1 m long (two spans of 71.05 m), and on the outer span of the machine, install a 31 m long console equipped with an end long-range jet device with a range of 35.6 m.
[0223] When forming the second section of the water supply pipeline of the machine, the arrangement of truss spans is carried out in the following order:
[0224] – the eleventh and twelfth spans of the machine are used to install 71.05 m long truss spans equipped with Ø159x3 mm pipeline.
[0225] – The outer (twelfth) truss bay of the machine is equipped with a 31-meter-long console, which is fitted with an end-firing jet device with a 35.6-meter reach. The end-firing jet device is fed from a booster pump via a parallel pipeline located along the console pipeline. The booster pump is installed at the end of the second section of the machine's water supply pipeline.
[0226] Example of implementation of method No. 2.
[0227] Implementation of the layout of the water supply pipeline of the sprinkler machine "Cascade 125T" for irrigation of a rectangular area with dimensions of 960x1010 m, with the size of the supply hydraulic module = 1.05 l / (s ha).
[0228] To irrigate an area of 960x1010 m, the irrigation radius of the sprinkler machine should be = 480 m.
[0229] The irrigation area will be = 72.38 hectares.
[0230] With a supply hydraulic module of 1.05 l / (s ha), the water consumption of the sprinkler machine will be = 76.0 l / s.
[0231] Next, using expression (19), we determine the length of the first section of the machine’s water supply pipeline.
[0232] In this case, knowing the irrigation radius and the value of the feed hydraulic module, the minimum length of the first section of the water supply pipeline of the machine can be established using expression (15) or using the graph (Fig. 10), in this case it will be = 187.95 m.
[0233] Taking into account the possible lengths of truss spans equipped with a Ø219x3 mm pipeline, and according to expression (19), the length of the first section of the water supply pipeline will be = 192.3 m. In this case, the first section of the machine’s water supply pipeline will consist of four truss spans 47.9 m long.
[0234] According to the proposed method, when forming the first section of the water supply pipeline of the machine, the arrangement of truss spans is carried out in the following order:
[0235] – from the first to the fourth span of the machine, truss spans of 47.9 m long are installed, equipped with a Ø219x3 mm pipeline.
[0236] If the irrigation radius of a sprinkler machine is 480 m and the length of the first section of the machine's water supply pipeline is 192.3 m, the remaining part of the machine must ensure a rain capture width in the direction of machine movement equal to 287.7 m. In this case, the most rational way to make the second section of the machine's water supply pipeline is to make it 238 m long (four spans of 59.5 m each), and on the outer span of the machine, install a 24 m long console equipped with an end long-range jet device with a range of 25.7 m.
[0237] When forming the second section of the water supply pipeline of the machine, the arrangement of truss spans is carried out in the following order:
[0238] – from the fifth to the eighth span of the machine, truss spans 59.5 m long are installed, equipped with a Ø159x3 mm pipeline.
[0239] – The outer (eighth) truss bay of the machine is equipped with a 24-meter-long console, which is fitted with an end-firing jet device with a 25.7-meter reach. The end-firing jet device is fed from a booster pump via a parallel pipeline located along the console pipeline. The booster pump is installed at the end of the second section of the machine's water supply pipeline.
Claims
1. A method for assembling a water supply pipeline for a low-pressure pivot irrigation machine with a truss span structure, including selecting the irrigation radius of the irrigation machine, which is performed taking into account the geometric parameters of the field, followed by determining the irrigation area, analyzing the soil and climatic characteristics of the irrigated area and determining the permissible rainfall intensity, on the basis of which the value of the supply hydraulic module is established, after which the required water flow rate is determined, then, taking into account the irrigation radius, the length and composition of the machine are selected, wherein the water supply pipeline of the machine is formed from pipelines of truss spans, which are successively hinged to each other, and the outer span of the machine is additionally equipped with a console, which is equipped with an end long-range jet apparatus or sprinkler, and the first section of the water supply pipeline of the machine is formed from truss spans equipped with a pipeline,made from pipes with an external diameter of d1 and a wall thickness of t1, and the second section of the water supply pipeline of the machine is formed from truss spans equipped with a pipeline made from pipes with an external diameter of d2 and a wall thickness of t2, wherein the working cross-section of the first section of the water supply pipeline of the machine is made larger than the working cross-section of its second section, characterized in that the first section of the water supply pipeline of the machine is made with a length determined using the following expression:, , where L1 is the length of the first section of the machine’s water supply pipeline, m; n – the number of truss spans that make up the first section of the machine’s water supply pipeline, pcs.; i is the serial number of the truss span equipped with a pipeline made of pipes with an outer diameter d1 and wall thickness t1; l i – length of the i-th truss span, m; l ш– the distance between the center of rotation of the irrigation machine and the center of the hinge joint of the first truss span with the rotary knee of the fixed support, m; d2 – outer diameter of the pipes of the second section of the water supply pipeline of the machine, m; t2 – wall thickness of the pipes of the second section of the water supply pipeline of the machine, m; q – supply hydraulic module, l / (s⋅ha); R ∂ – irrigation radius of the sprinkler machine, m; v max – the maximum value of the average water velocity recommended for low-pressure irrigation machine pipelines, m / s (v max = 3.5 m / s); in addition, when forming the first section of the water supply pipeline of the machine from truss spans of different lengths, the longest truss spans are placed at the beginning of the first section of the water supply pipeline of the machine.
2. A method for assembling a water supply pipeline of a low-pressure pivot irrigation machine with a truss span structure according to paragraph 1, characterized in that when using three or more standard sizes of truss spans that differ in length to form the first section of the water supply pipeline of the machine, the arrangement of the truss spans, when forming the first section of the water supply pipeline of the machine, is carried out from the beginning of the first section of the water supply pipeline of the machine in order of decreasing length in the direction of the end part of the irrigation machine.
3. A method for assembling a water supply pipeline of a low-pressure pivot irrigation machine with a truss span structure according to paragraph 1 or 2, characterized in that when forming the first section of the water supply pipeline of the machine, priority is given to such a composition of truss spans intended for a given section of the water supply pipeline of the machine, in which the first section of the water supply pipeline of the machine will have the shortest length with a minimum number of truss spans used to form the first section of the water supply pipeline of the machine.
4. A method for assembling a water supply pipeline of a low-pressure circular irrigation machine with a truss span structure according to paragraph 1, characterized in that when forming the second section of the water supply pipeline of the machine from truss spans of different lengths, the longest truss spans are placed at the beginning of the second section of the water supply pipeline of the machine.
5. A method for assembling a water supply pipeline of a low-pressure pivot irrigation machine with a truss span structure according to paragraph 1 or 4, characterized in that when using three or more standard sizes of truss spans that differ in length to form the second section of the water supply pipeline of the machine, the arrangement of the truss spans, when forming the second section of the water supply pipeline of the machine, is carried out from the beginning of the second section of the water supply pipeline of the machine in order of decreasing length in the direction of the end part of the irrigation machine.
6. A method for assembling a water supply pipeline for a low-pressure pivot irrigation machine with a truss span structure according to any one of paragraphs 1, 4 or 5, characterized in that the length of the second section of the water supply pipeline of the machine is selected in such a way that the outer span of the machine can be equipped with a console with an end long-range jet apparatus or sprinkler, having the largest possible rain capture width in the direction of movement of the machine.
7. A method for assembling a water supply pipeline for a low-pressure circular irrigation machine with a truss span structure according to paragraph 6, characterized in that the console is equipped with an end long-range jet device with a range of 15 to 39.5 m, which is fed from a booster pump through a parallel pipeline located along the console pipeline, wherein the booster pump is installed at the end of the second section of the water supply pipeline of the machine.
8. A method for assembling a water supply pipeline for a low-pressure pivot irrigation machine with a truss span structure according to paragraph 6, characterized in that the console is equipped with an end sprinkler with a range of 9.5 to 16.9 m, which is fed from a booster pump through a parallel pipeline located along the console pipeline, wherein the booster pump is installed at the end of the second section of the water supply pipeline of the machine.