CN116289783A - Dynamic water diversion revolving door of irrigation channel, irrigation channel system and water control method - Google Patents

Abstract

The invention discloses a dynamic diversion revolving door of an irrigation channel, an irrigation channel system and a water control method, which belong to the technical field of automatic measurement and control of irrigation agricultural channel flow, and comprise an arc-shaped side wall, a revolving door body, a supporting frame, a rotary driving mechanism and a PLC control system, wherein the rotary driving mechanism is used for driving the revolving door body to rotate; the PLC control system is used for controlling the start and stop of the rotary driving mechanism, the dynamic water diversion revolving door is arranged between an upstream channel and a downstream channel, an upstream water level logging is further arranged beside the upstream channel, an automatic data acquisition control instrument and a pressure water level meter are arranged in the logging, the on-site control system connected with the water diversion revolving door is used for establishing the correlation between the rotation number of the water diversion revolving door and the flow through the revolving door, and the flow of water passing through the revolving door can be calculated. Therefore, the measurement and control integrated irrigation management for adjusting the irrigation water quantity according to meteorological information, soil moisture content, crop requirements and the like is realized.

Description

Dynamic water diversion revolving door of irrigation channel, irrigation channel system and water control method

Technical Field

The invention belongs to the technical field of automatic measurement and control of irrigation canal flow, and particularly relates to a dynamic diversion revolving door of an irrigation canal, an irrigation canal system and a water control method.

Background

With the rapid development of the comprehensive national force of China, the total economic quantity is continuously increased, the consumption of resources is continuously increased, the population is increased and the agriculture is developed, so that the demand for water resources is gradually increased. Because the reserves of water resources in China are not abundant, saving water becomes a key task for sustainable development. The water resource is an indispensable resource in our daily life, the water resource consumption of farmland irrigation is large, and the water resource waste is serious due to inaccurate channel irrigation flow control. The water metering device has the advantages that various water metering facilities with stable performance, low manufacturing cost, high precision and convenient use in the irrigation area are researched and developed by combining the characteristics of the irrigation area, so that the metering water supply requirements of various channels in the irrigation area are met.

The water in the irrigation area is an important component of irrigation management work in the irrigation area, is an important work for reasonably scheduling irrigation water resources and implementing plan water consumption and metering charge, and is a necessary measure for strengthening economic management in the irrigation area. Through construction for decades, the irrigation area water measuring technology and measuring facilities are remarkably improved, irrigation area water management and development of water conservancy projects in China are effectively promoted, and the automation of the irrigation area water measuring technology is gradually realized in developed countries in the west. The water measurement technology in China is relatively late to start, and the water measurement consciousness is insufficient, so that the current measurement technology and facilities in the irrigation area cannot meet the actual water measurement requirement in the irrigation area. Along with the continuous development of water metering technology in irrigation areas, novel water level and water quantity measuring facilities such as a wing-shaped water metering tank, a channel self-recording type simple water level logging and the like are developed, but the problems that a plurality of limiting factors such as a measuring building cannot flexibly regulate and control water level and water quantity according to crop demands, the measuring precision of the controlling building is difficult to accurately control, frost heaving damage and maintenance requirements of the existing building are high, the automatic control degree is lower and the like still exist.

There is a need in the art for a new solution to this problem.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a dynamic water diversion revolving door of an irrigation channel, an irrigation channel system and a water control method, which are used for solving the problems that the water level and the water quantity can not be flexibly regulated and controlled according to the crop demands and the automation control degree is lower.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: an irrigation canal dynamic water diversion revolving door comprises an arc-shaped side wall, a revolving door body, a supporting frame, a rotary driving mechanism and a PLC control system; the two arc-shaped side walls are symmetrically arranged on the side walls of the irrigation channel; the rotary door body is arranged between the two arc-shaped side walls, and is in rotatable close fit with the arc-shaped side walls, and comprises a central shaft and a door leaf; the support frame is arranged on the side wall of the irrigation channel in a crossing manner; the rotary driving mechanism is hung below the supporting frame, is connected with the top of the middle shaft of the rotary door body and is used for driving the rotary door body to rotate; the PLC control system is used for controlling the start and stop of the rotary driving mechanism; the number of the door leaves is at least three, one end of each door leaf is fixed on the central shaft, and the door leaves are uniformly distributed on the circumference; the cambered surface of the arc side wall and the adjacent door leaf can enclose a closed fan-shaped space.

The rotary driving mechanism comprises a rotary shaft, a rotary angle engraving disc, a flange disc, a stepping motor, a rotary angle position sensor, a proximity switch, an infrared calibrator, a reduction gearbox, a motor and a limit switch; the rotating angle engraving disc is arranged on the rotating shaft, and a stepping motor is arranged above the rotating angle engraving disc through a flange disc; the rotation angle position sensor, the proximity switch and the infrared calibrator are arranged on one side of the stepping motor; the upper part of the stepping motor is provided with a reduction gearbox through a rotating shaft; the upper part of the reduction gearbox is provided with a motor through a flange plate; a limit switch is arranged below the motor; one end of the rotating shaft is connected with the supporting frame through a bearing, and the other end of the rotating shaft is connected with a center shaft of the revolving door body.

An irrigation channel system adopts the dynamic diversion revolving door of an irrigation channel, and further comprises an upstream channel, a downstream channel, an upstream water level logging, an automatic data acquisition control instrument, a solar panel and a pressure water level meter; an irrigation channel dynamic water diversion turnstile is arranged between the upstream channel and the downstream channel, and an upstream water level logging is also arranged beside the upstream channel; the upstream water level logging and the upstream channel are communicated with each other at the bottom, and the bottoms of the upstream water level logging and the upstream channel are positioned on the same horizontal plane; the automatic data acquisition control instrument and the pressure water level gauge are arranged in the upstream water level logging; the solar panel is arranged at the upper end of the upstream water level logging, and is used for supplying power to the system; the PLC control system is arranged at the upper end of the upstream water level logging.

An irrigation channel water control method adopts the irrigation channel system, which comprises the following steps:

step one, obtaining the width of door leaves of a rotary door body, the number of the door leaves and the water level height of an upstream channel;

converting the relation between the flow passing through the rotary door body and the revolution of the rotary door body; the formula is as follows:

Q＝(ψ/360o)*πρ2H*(KN/t+C)

wherein Q is the flow through the revolving door body, unit: cubic meters per second; psi is the included angle between the door leaves, and the unit is degree; ρ is the width of the door leaf in meters; h is the water level of the upstream channel, and the unit is meter; k and C are constants, and are obtained through experimental fitting; n is the revolution number of the water diversion revolving door in the irrigation period; t is irrigation duration, unit: second, wherein the second is;

setting single irrigation quantity, irrigation times and time intervals in a PLC control system according to the irrigation period requirement of crops;

step four, receiving a starting signal and selecting an initial position of the rotary door body as a zero point;

step five, calculating the number of revolutions for rotating the door body from the zero point according to the single irrigation demand and the formula of the step two;

step six, closing a circuit to start the rotary door body to drain;

step seven, after the single irrigation flow requirement is met, a circuit is disconnected, so that the rotary door body stops rotating to stop water;

and step eight, repeating the step four to the step seven according to the time interval set in the step three, and completing full-period irrigation.

Through the design scheme, the invention has the following beneficial effects:

1. the blades rotated by the water diversion revolving door have the effects of stirring and aerating, so that the oxygen content of irrigation water is improved, and meanwhile, flocculation and sedimentation of sediment in water can be accelerated, discharge of sediment, organic pollutants, chemical sediment and the like in the irrigation water can be reduced, and the yield and quality of crops are improved;

2. the measurement and control integrated irrigation management of irrigation water quantity regulation can be carried out according to meteorological information, soil moisture content, crop requirements and the like;

3. the motor and the gearbox are matched for use, so that the rotating speed of the water diversion revolving door can be flexibly changed, and the automatic adjustment of the revolving speed of the revolving door is realized.

Drawings

FIG. 1 is a schematic structural view of a dynamic water diversion revolving door for an irrigation channel according to the present invention.

FIG. 2 is a schematic structural view of a rotary driving mechanism of a dynamic diversion revolving door for irrigation channels.

Fig. 3 is a top view of an irrigation channel system of the present invention.

FIG. 4 is a 1-1 cross-sectional view of an irrigation channel system of the present invention.

Fig. 5 is a 2-2 cross-sectional view of an irrigation channel system of the present invention.

In the figure, the device comprises a 1-arc-shaped side wall, a 2-rotating door body, a 21-center shaft, a 22-door leaf, a 3-supporting frame, a 4-rotating driving mechanism, a 401-rotating shaft, a 402-rotating angle carving disc, a 403-flange disc, a 404-stepping motor, a 405-rotating angle position sensor, a 406-proximity switch, a 407-infrared calibrator, a 408-reduction gearbox, a 409-motor, a 410-limit switch, a 5-PLC control system, a 6-upstream channel, a 7-downstream channel, an 8-upstream water level logging, a 9-data automatic acquisition controller, a 10-solar panel and an 11-pressure water level gauge.

Detailed Description

The following describes the embodiments of the present invention in detail with reference to the drawings

It should be noted that the terms "front and rear," up and down, left and right, "and the like are merely simplified terms for intuitively describing the positional relationship based on the drawings, and are not limited to the technical solution.

In order to more clearly illustrate the present invention, the present invention will be further described with reference to preferred embodiments. Those skilled in the art will appreciate that. The following detailed description is illustrative rather than limiting, and the user may make various changes to the following parameters without departing from the inventive mechanism and scope set forth in the claims. Well-known methods and procedures have not been described in detail so as not to obscure the present invention.

The method is shown in the accompanying drawings from 1 to 5: an irrigation canal dynamic water diversion revolving door comprises an arc-shaped side wall 1, a revolving door body 2, a supporting frame 3, a rotary driving mechanism 4 and a PLC control system 5; the number of the arc-shaped side walls 1 is two, and the arc-shaped side walls 1 are symmetrically arranged on the side walls of the irrigation channels; the rotary door body 2 is arranged between the two arc-shaped side walls 1, the rotary door body 2 and the arc-shaped side walls 1 are in rotatable close fit, and the rotary door body 2 comprises a central shaft 21 and a door leaf 22; the support frames 3 are arranged on the side walls of the irrigation channels in a crossing mode; the rotary driving mechanism 4 is hoisted below the supporting frame 3, the rotary driving mechanism 4 is connected with the top of the center shaft 21 of the rotary door body 2, and the rotary driving mechanism 4 is used for driving the rotary door body 2 to rotate; the PLC control system 5 is used for controlling the start and stop of the rotary driving mechanism 4; the number of the door leaves 22 is at least three, one end of each door leaf 22 is fixed on the center shaft 21, and the door leaves 22 are uniformly distributed on the circumference; the cambered surface of the arc-shaped side wall 1 and the adjacent door leaf 22 can enclose a closed fan-shaped space, so that the rotary door body 2 can be ensured to be in a water stop state when staying at any position.

The rotation driving mechanism 4 may be constructed by any known technique, so long as it can drive the rotation of the revolving door body 2. In order to more precisely control the rotation of the revolving door body 2, the further rotation driving mechanism 4 includes a rotation shaft 401, a rotation angle dial 402, a flange 403, a stepping motor 404, a rotation angle position sensor 405, a proximity switch 406, an infrared calibrator 407, a reduction gearbox 408, a motor 409 and a limit switch 410; the rotating angle engraving plate 402 is arranged on the rotating shaft 401, and a stepping motor 404 is arranged above the rotating angle engraving plate 402 through a flange plate 403; the rotation angle position sensor 405, the proximity switch 406 and the infrared calibrator 407 are installed at one side of the stepper motor 404; the upper part of the stepping motor 404 is provided with a reduction gearbox 408 through a rotating shaft 401; the upper part of the reduction gearbox 408 is provided with a motor 409 through a flange plate 403; a limit switch 410 is arranged below the motor 409; one end of the rotating shaft 401 is connected with the supporting frame 3 through a bearing, and the other end of the rotating shaft 401 is connected with the center shaft 21 of the revolving door body 2.

The door leaf 22 may have a planar structure or a curved structure.

An irrigation channel system adopts the dynamic diversion turnstile of an irrigation channel, and further comprises an upstream channel 6, a downstream channel 7, an upstream water level logging 8, an automatic data acquisition control instrument 9, a solar panel 10 and a pressure water level meter 11; an irrigation channel dynamic water diversion turnstile is arranged between the upstream channel 6 and the downstream channel 7, and an upstream water level logging 8 is also arranged beside the upstream channel 6; the upstream water level well logging 8 is communicated with the bottom of the upstream channel 6, and the upstream water level well logging 8 and the bottom of the upstream channel 6 are positioned on the same horizontal plane; the automatic data acquisition controller 9 and the pressure water level meter 11 are arranged in the upstream water level logging 8; the solar panel 10 is arranged at the upper end of the upstream water level well logging 8, and the solar panel 10 is used for supplying power to the system; the PLC control system 5 is arranged at the upper end of the upstream water level well logging 8.

The irrigation canal system can rotate the water diversion revolving door by utilizing the motor. When the water diversion revolving door leaf rotates, the water diversion revolving door leaf is in a water drainage state; when the water diversion revolving door stops rotating, the water diversion revolving door is in a water stopping state, and the passing flow is regulated by controlling the rotating speed of the water diversion revolving door. When the rotation speed of the motor is fixed, the water level measured by the upstream water level meter is consistent with the water level in the revolving door, the rotation speed and the number of turns of the revolving door under the drive of the motor are known, and at the moment, the local control system connected with the water diversion revolving door establishes the correlation between the number of turns of the water diversion revolving door and the flow through the revolving door, so that the flow of water passing through the revolving door can be calculated. Therefore, the measurement and control integrated irrigation management for adjusting the irrigation water quantity according to meteorological information, soil moisture content, crop requirements and the like is realized.

An irrigation channel water control method adopts the irrigation channel system, which comprises the following steps:

step one, obtaining the width of the door leaves 22 of the rotary door body 2, the number of the door leaves 22 and the water level height of the upstream channel 6;

converting the relation between the flow passing through the revolving door body 2 and the revolution of the revolving door body 2; the formula is as follows:

Q＝(ψ/360o)*πρ2H*(KN/t+C)

wherein Q is the flow through the revolving door body, unit: cubic meters per second; psi is the included angle between the door leaves, and the unit is degree; ρ is the width of the door leaf in meters; h is the water level of the upstream channel, and the unit is meter; k and C are constants, and are obtained through experimental fitting; n is the revolution number of the water diversion revolving door in the irrigation period; t is irrigation duration, unit: second, wherein the second is;

setting single irrigation quantity, irrigation times and time intervals in the PLC control system 5 according to the irrigation period requirement of crops;

step four, receiving a starting signal and selecting an initial position of the rotary door body 2 as a zero point;

step five, calculating the number of revolutions for rotating the door body 2 from the zero point according to the single irrigation demand and the formula of the step two;

step six, closing a circuit to start the rotary door body 2 to drain;

step seven, after the single irrigation flow requirement is met, a circuit is disconnected, so that the rotary door body 2 stops rotating to stop water;

and step eight, repeating the step four to the step seven according to the time interval set in the step three, and completing full-period irrigation.

In specific implementation, the channel is a rectangular channel; the automatic data acquisition controller 9 is in data transmission connection with the motor through a data line; the solar panel 10 is arranged on the vertical rod, and the solar panel 10 is in power transmission connection with the automatic data acquisition controller 9 and the motor 409 through a power line; the revolving door body 2 is of a three-wing revolving vane structure, and waterproof adhesive tapes are arranged at the bottom and the side edges of the door leaf 22 and used for sealing, caulking and waterproofing. Limit switch 410 is used to detect the position of the water diversion revolving door and to lock the water diversion revolving door; the rotation angle position sensor 405, the proximity switch 406 and the infrared calibrator 407 are used in combination with the rotation angle dial 402 to detect the rotation angle and rotation speed of the revolving door and calibrate the rotation position of the revolving door. The pressure water level meter 11 is placed in the upstream water level well logging 8, a sensor is placed in the upstream water level well logging 8 and used for measuring the water level of the upstream channel 6, and a signal is input into the data automatic acquisition control instrument 9 through a wire.

When the control center receives irrigation requirement information, firstly, the data automatic acquisition controller 9 receives signals to start to acquire field data such as a revolving door, a motor nameplate and a water level, and the relationship between the converted flow and the revolution is started; the rotation angle position sensor 405 receives the start signal and selects an initial position of the revolving door as a zero point (a specific initial value is set according to specific field application), the control center calculates the rotation number and angle of the revolving door which starts to rotate from the zero point and transmits the signal to the rotation angle position sensor 405, the proximity switch 406 is instructed to rotate to the position, at the moment, the infrared calibrator 407 starts to calibrate whether the position of the proximity switch 406 is accurate or not, and feeds the calibration information back to the revolving angle position sensor 405 to check the initial zero point, and then the proximity switch 406 is closed to be connected in a circuit. Before the motor 409 starts to rotate, the on-site reduction gearbox 408 adjusts the rotation speeds of the motor 409 and the revolving door according to the transmission ratio of the motor 409, an input rotation speed signal is transmitted to the motor 409, an output signal is transmitted to the stepping motor 404, the motor 409 starts to rotate at a specified input rotation speed after receiving the signal, and the revolving door and the stepping motor 404 are driven to synchronously rotate at the output rotation speed through the rotating shaft, so that the channel is in a water draining state. Of course, the speed change adjustment method mentioned herein is only an optimal method, and other methods for achieving this speed change can be adopted by those skilled in the art to solve the speed change problem. The rotation speed of the revolving door is set to be three gears of high, medium and low, when the revolving door is about to complete the task of the appointed revolution, the control center instructs the reduction gearbox 408 to adjust and reduce the speed, so that the revolving door runs at a low rotation speed. The closing information is transmitted to the control center, the control center receives the signal and instructs the limit switch 410 to start closing, the circuit is opened, the motor 409 is closed, the revolving door stops rotating, and the channel is in a water stop state.

The irrigation system of early rice in a certain irrigation area is specifically described by taking irrigation of early rice in a certain year as an example, and is as follows:

TABLE 1 irrigation schedule for early rice growth period of certain year in certain irrigation area

This early rice's growth period needs to irrigate 5 times altogether, before the first time irrigates, arrange branch water revolving door device in channel water diversion mouth department, control center is according to the weather information of irrigation date on the day, soil moisture content, information such as crop demand, instruction data acquisition control appearance 9 gathers information and calculate required water yield, it is the revolution that needs pivoted to irrigate the revolving door at every turn with it through the flow calculation formula of branch water revolving door, and upload to control center, and then instruct the revolving door to rotate to appointed position with certain rotational speed in appointed time, accomplish automatic irrigation, realize the full growth period developments of crop and irrigate.

It will be apparent that the embodiments described above are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Claims (6)

1. An irrigation canal developments branch revolving door, its characterized in that: comprises an arc-shaped side wall (1), a rotary door body (2), a supporting frame (3), a rotary driving mechanism (4) and a PLC control system (5); the number of the arc-shaped side walls (1) is two, and the arc-shaped side walls (1) are symmetrically arranged on the side wall of the irrigation channel; the rotary door body (2) is arranged between the two arc-shaped side walls (1), the rotary door body (2) and the arc-shaped side walls (1) are in rotatable close fit, and the rotary door body (2) comprises a central shaft (21) and a door leaf (22); the supporting frame (3) is arranged on the side wall of the irrigation channel in a crossing way; the rotary driving mechanism (4) is hoisted below the supporting frame (3), the rotary driving mechanism (4) is connected with the top of a middle shaft (21) of the rotary door body (2), and the rotary driving mechanism (4) is used for driving the rotary door body (2) to rotate; the PLC control system (5) is used for controlling the start and stop of the rotary driving mechanism (4); the number of the door leaves (22) is at least three, one end of each door leaf (22) is fixed on the center shaft (21), and the door leaves (22) are uniformly distributed on the circumference; the cambered surface of the arc side wall (1) and the adjacent door leaf (22) can enclose a closed fan-shaped space.

2. The dynamic diversion revolving door for irrigation channels according to claim 1, wherein: the rotary driving mechanism (4) comprises a rotating shaft (401), a rotary angle engraving disc (402), a flange (403), a stepping motor (404), a rotary angle position sensor (405), a proximity switch (406), an infrared calibrator (407), a reduction gearbox (408), a motor (409) and a limit switch (410); the rotating angle engraving disc (402) is arranged on the rotating shaft (401), and a stepping motor (404) is arranged above the rotating angle engraving disc (402) through a flange (403); the rotation angle position sensor (405), the proximity switch (406) and the infrared calibrator (407) are arranged on one side of the stepping motor (404); the upper part of the stepping motor (404) is provided with a reduction gearbox (408) through a rotating shaft (401); the upper part of the reduction gearbox (408) is provided with a motor (409) through a flange plate (403); a limit switch (410) is arranged below the motor (409); one end of the rotating shaft (401) is connected with the supporting frame (3) through a bearing, and the other end of the rotating shaft (401) is connected with the center shaft (21) of the revolving door body (2).

3. The dynamic diversion revolving door for irrigation channels according to claim 1, wherein: the door leaf (22) is of a planar structure.

4. The dynamic diversion revolving door for irrigation channels according to claim 1, wherein: the door leaf (22) is of a curved surface structure.

5. An irrigation channel system employing a dynamic diversion turnstile for irrigation channels according to any one of claims 1-4, wherein: the system also comprises an upstream channel (6), a downstream channel (7), an upstream water level logging (8), a data automatic acquisition control instrument (9), a solar panel (10) and a pressure water level meter (11); an irrigation channel dynamic water diversion turnstile is arranged between the upstream channel (6) and the downstream channel (7), and an upstream water level logging (8) is also arranged beside the upstream channel (6); the upstream water level well logging (8) is communicated with the bottom of the upstream channel (6), and the upstream water level well logging (8) and the bottom of the upstream channel (6) are positioned on the same horizontal plane; the automatic data acquisition control instrument (9) and the pressure water level gauge (11) are arranged in the upstream water level logging (8); the solar panel (10) is arranged at the upper end of the upstream water level well logging (8), and the solar panel (10) is used for supplying power to the system; the PLC control system (5) is arranged at the upper end of the upstream water level well logging (8).

6. An irrigation channel control method using an irrigation channel system according to claim 5, comprising the steps of:

step one, obtaining the width of the door leaves (22) of the rotary door body (2), the number of the door leaves (22) and the water level height of the upstream channel (6);

converting the relation between the flow passing through the rotary door body (2) and the revolution of the rotary door body (2); the formula is as follows:

Q＝(ψ/360°)*πρ ² H*(KN/t+C)

wherein Q is the flow through the revolving door body, unit: cubic meters per second; psi is the included angle between the door leaves, and the unit is degree; ρ is the width of the door leaf in meters; h is the water level of the upstream channel, and the unit is meter; k and C are constants, and are obtained through experimental fitting; n is the revolution number of the water diversion revolving door in the irrigation period; t is irrigation duration, unit: second, wherein the second is;

setting single irrigation quantity, irrigation times and time intervals in a PLC control system (5) according to the irrigation period requirement of crops;

step four, receiving a starting signal and selecting an initial position of the rotary door body (2) as a zero point;

step five, calculating the number of revolutions for rotating the door body (2) from the zero point according to the single irrigation demand and the formula of the step two;

step six, closing a circuit to start the rotary door body (2) to drain;

step seven, after the single irrigation flow requirement is met, a circuit is disconnected, so that the rotary door body (2) stops rotating to stop water;

and step eight, repeating the step four to the step seven according to the time interval set in the step three, and completing full-period irrigation.

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