CN112042519B - Variable-depth underground irrigation device and method for guiding root growth - Google Patents
Variable-depth underground irrigation device and method for guiding root growth Download PDFInfo
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- CN112042519B CN112042519B CN202010890952.0A CN202010890952A CN112042519B CN 112042519 B CN112042519 B CN 112042519B CN 202010890952 A CN202010890952 A CN 202010890952A CN 112042519 B CN112042519 B CN 112042519B
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- 238000003973 irrigation Methods 0.000 title claims abstract description 130
- 230000002262 irrigation Effects 0.000 title claims abstract description 127
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000002786 root growth Effects 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 195
- 238000003860 storage Methods 0.000 claims abstract description 46
- 230000012010 growth Effects 0.000 claims abstract description 25
- 239000003621 irrigation water Substances 0.000 claims abstract description 13
- 238000009736 wetting Methods 0.000 claims abstract description 13
- 239000002689 soil Substances 0.000 claims abstract description 9
- 239000003337 fertilizer Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 5
- 230000003165 hydrotropic effect Effects 0.000 claims 1
- 239000003566 sealing material Substances 0.000 claims 1
- 238000001704 evaporation Methods 0.000 abstract description 4
- 230000008020 evaporation Effects 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract description 3
- 238000009423 ventilation Methods 0.000 abstract description 3
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 230000018109 developmental process Effects 0.000 description 8
- 229940059082 douche Drugs 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- 238000007605 air drying Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010496 root system development Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G29/00—Root feeders; Injecting fertilisers into the roots
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C23/00—Distributing devices specially adapted for liquid manure or other fertilising liquid, including ammonia, e.g. transport tanks or sprinkling wagons
- A01C23/02—Special arrangements for delivering the liquid directly into the soil
- A01C23/023—Special arrangements for delivering the liquid directly into the soil for liquid or gas fertilisers
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C23/00—Distributing devices specially adapted for liquid manure or other fertilising liquid, including ammonia, e.g. transport tanks or sprinkling wagons
- A01C23/04—Distributing under pressure; Distributing mud; Adaptation of watering systems for fertilising-liquids
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C23/00—Distributing devices specially adapted for liquid manure or other fertilising liquid, including ammonia, e.g. transport tanks or sprinkling wagons
- A01C23/04—Distributing under pressure; Distributing mud; Adaptation of watering systems for fertilising-liquids
- A01C23/042—Adding fertiliser to watering systems
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- Environmental Sciences (AREA)
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Abstract
本发明涉及引导根系生长的变深度地下灌溉装置及方法。本发明包括加压装置、干管、封闭支管以及开孔支管；灌溉水通过封闭支管的柱形流道流向贮水仓，再经分流管流向环形灌水器，最后由环形灌水器的出水孔流向开孔支管的灌水孔及下段干管。本发明可实现引导根系横纵向发展，从而促进作物生长；根据作物不同的生育期控制灌水量及灌水深度，减少蒸发，节约水资源及肥料；灌水深度及湿润半径可变，可拓宽一般地下灌溉系统的适用范围；通过控制根系与灌溉水接触时间，有利于土壤通气，防止烂根；灌水器置于支管内部，可避免地下灌水器堵塞的问题；可拆卸的特性，可让地下灌溉装置适用于更多场合，同时便于干管的回收及存放；可实现水肥一体化。
The invention relates to a variable depth underground irrigation device and method for guiding root growth. The invention includes a pressurizing device, a main pipe, a closed branch pipe and an open-hole branch pipe; the irrigation water flows to the water storage tank through the cylindrical flow channel of the closed branch pipe, and then flows to the annular irrigator through the branch pipe, and finally flows to the water outlet of the annular irrigator. The irrigation hole of the perforated branch pipe and the lower section of the main pipe. The invention can guide the horizontal and vertical development of the root system, thereby promoting the growth of crops; control the amount of irrigation water and the depth of irrigation according to different growth periods of crops, reduce evaporation, save water resources and fertilizers; the depth of irrigation and the wetting radius are variable, and can widen the general underground irrigation. The scope of application of the system; by controlling the contact time between the root system and the irrigation water, it is conducive to soil ventilation and prevents root rot; the irrigator is placed inside the branch pipe, which can avoid the problem of clogging of the underground irrigator; the detachable feature can make the underground irrigation device suitable In more occasions, it is convenient for the recovery and storage of main pipes; it can realize the integration of water and fertilizer.
Description
Technical Field
The invention relates to a variable-depth underground irrigation device and method for guiding root growth, and belongs to the technical field of agricultural water-saving irrigation.
Background
In the current agricultural production, in order to improve the utilization rate of water resources and save the water consumption for irrigation, people explore various water-saving irrigation modes. Agricultural water-saving irrigation technology develops till now, and underground irrigation is comparatively ripe in the field irrigation engineering, but in the actual production process, ordinary underground irrigation system function and application condition are more single, and have defects such as easy jam. With the growth of crops, the root systems of the crops develop gradually, and the required irrigation water quantity, irrigation depth and irrigation wetting radius are also different. Most of the existing underground irrigation systems are embedded underground before the fixed planting of crops, the irrigation depth and the irrigation radius are fixed, and the limitation on root growth, crop development and water utilization is large. Therefore, the application conditions of the underground irrigation system are widened, the function diversification of the underground irrigation is improved, and the method is particularly important in the technical field of agricultural water-saving irrigation.
Existing subsurface irrigation devices generally have the following disadvantages:
(1) most of the existing underground irrigation devices are pre-buried before the fixed planting of crops, the irrigation depth and the radius are fixed and unchanged, and the development of crop roots is limited, so that the growth of the crops is influenced.
(2) The irrigation flow of the existing underground irrigation device is generally unchangeable and can not be completely adapted to the irrigation water requirement of crops in different periods.
(3) The irrigation water volume of the underground irrigation device mostly stays in a shallow soil area, the evaporation capacity is large, and the water utilization efficiency needs to be improved.
(4) The current underground irrigation device is usually directly carried irrigation water to around the crop root system, fails make full use of root system to water to fertile nature, guides the root system development, promotes crop growth.
The existing underground irrigation device is easy to block and is not easy to dredge and overhaul.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention provides a variable-depth underground irrigation device and method for guiding root growth, which can realize the transverse and longitudinal development of the root so as to promote the growth of crops, reduce the evaporation of irrigation water and save water resources and fertilizers, and meanwhile, the irrigation depth, irrigation quantity and wetting radius of the irrigation device are variable, so that the application range of a common underground irrigation system can be widened, the ventilation of soil is facilitated, root rot is prevented, the problem of blockage of the underground irrigation device can be avoided, the device has the detachable characteristic, and the water and fertilizer integration is realized.
The technical scheme of the invention is as follows: a variable-depth underground irrigation device for guiding root growth comprises a pressurizing device 1, a main pipe 2, a closed branch pipe 5 and a perforated branch pipe 8;
irrigation water enters from a water inlet at the left end of the air drying pipe 2, flows to the water storage bin 9 through the cylindrical flow channel 11 of the closed branch pipe 5, flows to the annular irrigator 13 through the flow dividing pipe 10, and finally flows to the irrigation holes 16 of the perforated branch pipe 8 and the lower section trunk pipe from the water outlet hole 14 of the annular irrigator 13; the main pipe 2 is vertically connected with the closed branch pipe 5 in a tee pipe mode; in the closed branch pipe 5, the sliding piston 6 is tightly attached to the inner wall of the closed branch pipe 5, the sliding piston slides in the sliding cavity 7 under the action of water pressure, the cylindrical runner 11 is connected with the water storage bin 9 in the perforated branch pipe 8, the water storage bin 9 in the perforated branch pipe 8 is connected with the shunt pipe 10, the annular emitter 13 is a hollow cylinder, a row of water outlet holes 14 are uniformly formed in the outer curved surface and tightly attached to the inner wall of the perforated branch pipe 8, the shunt pipe 10 is connected to the inner curved surface of the annular emitter 13, the hollow piston 12 is tightly attached to the upper portion of the annular emitter 13, the closed piston 15 is tightly attached to the lower portion of the annular emitter 13, and the water filling holes 16 are uniformly formed in the lower half portion of the perforated branch pipe 8.
As a further proposal of the invention, in the closed branch pipe 5, the sliding piston 6 is a hollow cylinder made of elastic waterproof material, the outer edge of the ring-shaped irrigator is tightly attached to the inner wall of the closed branch pipe 5, a cylindrical flow passage 11 in the sliding piston 6 is connected with a water storage bin 9 of the branch pipe 8 with a hole, the water storage bin 9 is connected with four branch pipes 10, the branch pipes 10 are communicated with the inner curved surface of the ring-shaped irrigator 13, a hollow piston 12 and a closed piston 15 are respectively fixed on the upper part and the lower part of the ring-shaped irrigator 13, namely a sliding piston 6, a cylindrical flow passage 11, a water storage bin 9, a shunt pipe 10, an annular douche 13, a hollow piston 12 and a closed piston 15 are connected into a whole, are pushed by water pressure to move in a closed branch pipe 5 and an open branch pipe 8, therefore, the purpose of changing the irrigation depth is achieved, the water outlet pressure of the water outlet hole 14 is changed by combining the adjustment of the water pressure, and the purpose of changing the radius of the wetting body is achieved.
As a further scheme of the invention, the closed branch pipe 5 comprises a sliding piston 6, a sliding cavity 7 and a cylindrical flow passage 11; the sliding piston 6 is tightly attached to the inner wall of the closed branch pipe 5 and slides in the sliding cavity 7; the perforated branch pipe 8 comprises a water storage bin 9, a shunt pipe 10, a hollow piston 12, an annular douche 13 and a closed piston 15; the shell of the closed branch pipe 5 is made of impervious closed material, the shell of the perforated branch pipe 8 is divided into an upper part and a lower part by an annular irrigator 13 at an initial position, the upper part is closed, and the lower part is provided with an irrigation hole 16.
As a further scheme of the invention, according to the arrangement mode that the underground irrigation device is matched with the crops to be planted, the water outlet holes 14 arranged on the annular irrigator 13 can be manually and selectively opened, and if the water outlet holes 14 are fully opened on the annular irrigator 13, the variable-depth underground irrigation device for guiding the root system to grow can be arranged under a single row of crops; if apopore 14 is seted up to half side on the annular emitter 13, the variable depth underground irrigation device of guide root system growth can arrange between two rows of crops, both ends about main pipe 2, seal branch pipe 5, trompil branch pipe 8 both ends are all made and are dismantled the form from top to bottom, can be connected with arbitrary irrigation pipe promptly, realize different irrigation methods, satisfy different irrigation demands.
As a further scheme of the invention, the opening 17 is arranged on the perforated branch pipe 8 and is used for sleeving the cylindrical flow passage 11, the diameter of the cylindrical flow passage 11 is consistent with that of the opening 17, the cylindrical flow passage 11 and the opening 17 are movably connected, the lower half part of the perforated branch pipe 8 is provided with a water filling hole 16, the circular surface of the bottom is closed to prevent leakage, one end of the shunt pipe 10 is communicated with the water storage bin 9, the other end of the shunt pipe is communicated with a water inlet 20 inside the annular water filling device 13, and the specific sizes of the closed branch pipe 5 and the perforated branch pipe 8 can be changed according to the change of the types of crops.
As a further scheme of the invention, the outer diameter of the sliding piston 6 is larger than the opening 17 of the perforated branch pipe, so that the plane of the opening 17 of the perforated branch pipe is the lower limit of the sliding piston 6, the connecting surface of the cylindrical flow passage 11 and the water inlet 19 of the water storage bin is circular, the diameter is consistent with that of the cylindrical flow passage 11, the outer diameter of the annular emitter 13 is consistent with the inner diameter of the perforated branch pipe 8, the water outlet 14 is tightly attached to the inner wall of the perforated branch pipe 8 and is attached to the water irrigation holes 16, the aperture of the water irrigation holes 16 is smaller than that of the water outlet 14, and the opening density of the water irrigation holes 16 is larger than that of the water outlet 14, so as to ensure smooth water outlet and prevent the annular emitter 13 from being blocked due to winding of soil and gravel or root systems.
As a further scheme of the invention, the hollow piston 12, the annular emitter 13 and the closed piston 15 are fixedly connected and move together with the cylindrical runner 11, the outer diameters of the three are consistent, the inner diameter of the hollow piston 12 is consistent with the inner diameter of the annular emitter 13, the three are tightly attached to the inner wall of the perforated branch pipe 8 and are pressurized by the pressurizing device 1 to push the sliding piston 6 to move downwards so as to drive the cylindrical runner 11, the water storage bin 9, the shunt pipe 10 and the annular emitter 13 to move along the inner wall of the perforated branch pipe 8, the depth of the water outlet 14 on the annular emitter 13 is the only water outlet depth of the underground irrigation device, and the emitter 16 matched with the water outlet 14 is the only water outlet of the underground irrigation device.
A method of variable depth sub-irrigation for guiding root growth, the method comprising:
step1, according to the growth rules of different crop roots, in the growth and development process of crops, the pressurizing device 1 pressurizes to push the sliding piston 6 to move downwards to a first depth A, so as to drive the cylindrical runner 11, the water storage bin 9, the shunt pipe 10 and the annular irrigator 13 to move along the inner wall of the perforated branch pipe 8, the depth of a water outlet hole 14 on the annular irrigator 13 along with the water outlet hole is the only water outlet depth B of irrigation, the irrigation hole 16 matched with the water outlet hole 14 is the only water outlet of irrigation, the water outlet depth B is greater than the length of the longest root system, namely, the wetting body keeps a certain depth from the root system for a certain time; during the period, the periphery of the root system is dry, and the root system grows deeper and wider due to the fertilizer property towards water, namely the root system grows towards a moist body;
step2, when the root system grows and contacts the wetting body, the pressurizing device 1 stops pressurizing, the sliding piston 6 is kept at the first depth A, the cylindrical flow channel 11, the water storage bin 9, the shunt pipe 10 and the annular emitter 13 also stay at corresponding positions, the water outlet hole 14 on the annular emitter 13 continuously discharges water, the water discharging depth is unchanged at the depth B, the water discharging hole 16 matched with the water outlet hole 14 is the only water outlet of the underground irrigation device, and the root system is kept in contact with the wetting body for a certain time; during the period, the root system absorbs water to ensure the water needed by the growth of crops;
step3, after the root system is kept in contact with the moist body for a certain time, the pressurizing device 1 continues pressurizing, the sliding piston 6 is pushed to move downwards to the depth C, the cylindrical flow channel 11, the water storage bin 9, the flow dividing pipe 10 and the annular irrigator 13 are driven to move along the inner wall of the perforated branch pipe 8, the depth of the water outlet hole 14 on the annular irrigator 13 along with the water outlet hole is the only water outlet depth D of the underground irrigator, the irrigation hole 16 matched with the water outlet hole 14 is the only water outlet for irrigation, the only water outlet depth D for irrigation is larger than the longest root system length at the moment, and the moist body is kept for a certain time at a certain depth from the root system; during the period, the roots are dry, and because the roots grow to be fertile towards water, the roots can grow to be deeper and wider, namely to be in the direction of a wet body.
And (3) repeatedly executing Step 1-Step 3, gradually increasing the pressure of the pressurizing device 1, wherein the pressurizing strength is higher than the last pressurizing strength every time, so that the irrigation depth is pushed to move to a deeper position along with the growth of the root system, the necessary water of the crop can be ensured, the growth of the root system of the crop is guided, the development of the root system is promoted, and the water utilization efficiency is improved.
The invention has the beneficial effects that: the invention can realize the transverse and longitudinal development of the guide root system, thereby promoting the growth of crops; controlling irrigation quantity and irrigation depth according to different growth periods of crops, reducing evaporation and saving water resources and fertilizers; the irrigation depth and the wetting radius of the irrigation system are variable, so that the application range of a common underground irrigation system can be widened; the contact time of the root system and irrigation water is controlled, so that soil ventilation is facilitated, and root rot is prevented; the douche is arranged inside the branch pipe, so that the problem of blockage of the douche is avoided; the characteristic of detachability can make the underground irrigation device suitable for more occasions, and is convenient for the recovery and storage of the main pipe; can realize the integration of water and fertilizer.
Drawings
FIG. 1 is a schematic view of the general structure of the present invention;
FIG. 2 is a partial detail view of the perforated leg 8 of the present invention;
FIG. 3 is an internal detail view of the present invention;
FIG. 4 is a partial detail view of the present invention;
FIG. 5 is a schematic three-dimensional view of the hollow piston 12 of the present invention;
FIG. 6 is a three-dimensional perspective view of the annular emitter 13 of the present invention;
FIG. 7 is a three-dimensional perspective view of the closure piston 15 of the present invention;
FIG. 8 is a first schematic view of the present invention, with the arrows indicating the direction of water flow;
FIG. 9 is a second schematic view of the present invention, with the arrows indicating the direction of water flow.
The reference numbers in the figures: 1-pressurizing device, 2-trunk, 3-crop root system, 4-soil surface, 5-closed branch pipe, 6-sliding piston, 7-sliding cavity, 8-perforated branch pipe, 9-water storage bin, 10-shunt pipe, 11-column flow channel, 12-hollow piston, 13-annular irrigator, 14-water outlet hole, 15-closed piston, 16-irrigation hole, 17-opening, 18-perforated branch pipe perforated upper limit, 19-water storage bin water inlet and 20-water inlet inside the annular irrigator.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Example 1: as shown in fig. 1-9, a variable depth underground irrigation device for guiding root growth comprises a pressurizing device 1, a main pipe 2, a closed branch pipe 5 and an open branch pipe 8;
irrigation water enters from a water inlet at the left end of the air drying pipe 2, flows to the water storage bin 9 through the cylindrical flow channel 11 of the closed branch pipe 5, flows to the annular irrigator 13 through the flow dividing pipe 10, and finally flows to the irrigation holes 16 of the perforated branch pipe 8 and the lower section trunk pipe from the water outlet hole 14 of the annular irrigator 13; the main pipe 2 is vertically connected with the closed branch pipe 5 in a tee pipe mode; in the closed branch pipe 5, the sliding piston 6 is tightly attached to the inner wall of the closed branch pipe 5, the sliding piston slides in the sliding cavity 7 under the action of water pressure, the cylindrical runner 11 is connected with the water storage bin 9 in the perforated branch pipe 8, the water storage bin 9 in the perforated branch pipe 8 is connected with the shunt pipe 10, the annular emitter 13 is a hollow cylinder, a row of water outlet holes 14 are uniformly formed in the outer curved surface and tightly attached to the inner wall of the perforated branch pipe 8, the shunt pipe 10 is connected to the inner curved surface of the annular emitter 13, the hollow piston 12 is tightly attached to the upper portion of the annular emitter 13, the closed piston 15 is tightly attached to the lower portion of the annular emitter 13, and the water filling holes 16 are uniformly formed in the lower half portion of the perforated branch pipe 8.
As a further proposal of the invention, in the closed branch pipe 5, the sliding piston 6 is a hollow cylinder made of elastic waterproof material, the outer edge of the ring-shaped irrigator is tightly attached to the inner wall of the closed branch pipe 5, a cylindrical flow passage 11 in the sliding piston 6 is connected with a water storage bin 9 of the branch pipe 8 with a hole, the water storage bin 9 is connected with four branch pipes 10, the branch pipes 10 are communicated with the inner curved surface of the ring-shaped irrigator 13, a hollow piston 12 and a closed piston 15 are respectively fixed on the upper part and the lower part of the ring-shaped irrigator 13, namely a sliding piston 6, a cylindrical flow passage 11, a water storage bin 9, a shunt pipe 10, an annular douche 13, a hollow piston 12 and a closed piston 15 are connected into a whole, are pushed by water pressure to move in a closed branch pipe 5 and an open branch pipe 8, therefore, the purpose of changing the irrigation depth is achieved, the water outlet pressure of the water outlet hole 14 is changed by combining the adjustment of the water pressure, and the purpose of changing the radius of the wetting body is achieved.
As a further scheme of the invention, the closed branch pipe 5 comprises a sliding piston 6, a sliding cavity 7 and a cylindrical flow passage 11; the sliding piston 6 is tightly attached to the inner wall of the closed branch pipe 5 and slides in the sliding cavity 7; the perforated branch pipe 8 comprises a water storage bin 9, a shunt pipe 10, a hollow piston 12, an annular douche 13 and a closed piston 15; the shell of the closed branch pipe 5 is made of impervious closed material, the shell of the perforated branch pipe 8 is divided into an upper part and a lower part by an annular irrigator 13 at an initial position, the upper part is closed, and the lower part is provided with an irrigation hole 16.
As a further scheme of the invention, according to the arrangement mode that the underground irrigation device is matched with the crops to be planted, the water outlet holes 14 arranged on the annular irrigator 13 can be manually and selectively opened, and if the water outlet holes 14 are fully opened on the annular irrigator 13, the variable-depth underground irrigation device for guiding the root system to grow can be arranged under a single row of crops; if apopore 14 is seted up to half side on the annular emitter 13, the variable depth underground irrigation device of guide root system growth can arrange between two rows of crops, both ends about main pipe 2, seal branch pipe 5, trompil branch pipe 8 both ends are all made and are dismantled the form from top to bottom, can be connected with arbitrary irrigation pipe promptly, realize different irrigation methods, satisfy different irrigation demands.
As a further scheme of the invention, the opening 17 is arranged on the perforated branch pipe 8 and is used for sleeving the cylindrical flow passage 11, the diameter of the cylindrical flow passage 11 is consistent with that of the opening 17, the cylindrical flow passage 11 and the opening 17 are movably connected, the lower half part of the perforated branch pipe 8 is provided with a water filling hole 16, the circular surface of the bottom is closed to prevent leakage, one end of the shunt pipe 10 is communicated with the water storage bin 9, the other end of the shunt pipe is communicated with a water inlet 20 inside the annular water filling device 13, and the specific sizes of the closed branch pipe 5 and the perforated branch pipe 8 can be changed according to the change of the types of crops.
As a further scheme of the invention, the outer diameter of the sliding piston 6 is larger than the opening 17 of the perforated branch pipe, so that the plane of the opening 17 of the perforated branch pipe is the lower limit of the sliding piston 6, the connecting surface of the cylindrical flow passage 11 and the water inlet 19 of the water storage bin is circular, the diameter is consistent with that of the cylindrical flow passage 11, the outer diameter of the annular emitter 13 is consistent with the inner diameter of the perforated branch pipe 8, the water outlet 14 is tightly attached to the inner wall of the perforated branch pipe 8 and is attached to the water irrigation holes 16, the aperture of the water irrigation holes 16 is smaller than that of the water outlet 14, and the opening density of the water irrigation holes 16 is larger than that of the water outlet 14, so as to ensure smooth water outlet and prevent the annular emitter 13 from being blocked due to winding of soil and gravel or root systems.
As a further scheme of the invention, the hollow piston 12, the annular emitter 13 and the closed piston 15 are fixedly connected and move together with the cylindrical runner 11, the outer diameters of the three are consistent, the inner diameter of the hollow piston 12 is consistent with the inner diameter of the annular emitter 13, the three are tightly attached to the inner wall of the perforated branch pipe 8 and are pressurized by the pressurizing device 1 to push the sliding piston 6 to move downwards so as to drive the cylindrical runner 11, the water storage bin 9, the shunt pipe 10 and the annular emitter 13 to move along the inner wall of the perforated branch pipe 8, the depth of the water outlet 14 on the annular emitter 13 is the only water outlet depth of the underground irrigation device, and the emitter 16 matched with the water outlet 14 is the only water outlet of the underground irrigation device.
A method of variable depth sub-irrigation for guiding root growth, the method comprising:
step1, according to the growth rules of different crop roots, in the growth and development process of crops, the pressurizing device 1 pressurizes to push the sliding piston 6 to move downwards to a first depth A, so as to drive the cylindrical runner 11, the water storage bin 9, the shunt pipe 10 and the annular emitter 13 to move along the inner wall of the perforated branch pipe 8, the depth reached by the water outlet hole 14 on the annular emitter 13 is the only water outlet depth B for irrigation, the irrigation hole 16 matched with the water outlet hole 14 is the only water outlet for irrigation, the water outlet depth B is greater than the longest root length, namely, the moist body is kept at a certain depth from the root system for a certain time (the periphery of the root system is dry during the period, the root system grows to be water fertile, and the root system grows to be deeper and wider, namely, in the direction of the moist body);
step2, when the root system grows and contacts the wetting body, the pressurizing device 1 stops pressurizing, the sliding piston 6 is kept at the first depth A, the cylindrical flow channel 11, the water storage bin 9, the shunt pipe 10 and the annular emitter 13 also stay at corresponding positions, the water outlet hole 14 on the annular emitter 13 continuously discharges water, the water discharging depth is unchanged at the depth B, the water discharging hole 16 matched with the water outlet hole 14 is the only water outlet of the underground irrigation device, and the root system is kept in contact with the wetting body for a certain time (during the period, the root system absorbs water, and the water required by the growth of crops is ensured);
step3, after the root system is kept in contact with the moist body for a certain time, the pressurizing device 1 continues pressurizing, the sliding piston 6 is pushed to move downwards to the depth C, the cylindrical flow channel 11, the water storage bin 9, the flow dividing pipe 10 and the annular irrigator 13 are driven to move along the inner wall of the perforated branch pipe 8, the depth of the water outlet hole 14 on the annular irrigator 13 along with the water outlet hole is the only water outlet depth D of the underground irrigator, the irrigation hole 16 matched with the water outlet hole 14 is the only water outlet for irrigation, the only water outlet depth D for irrigation is larger than the longest root system length at the moment, namely, the moist body is kept at a certain depth from the root system for a certain time (during the period, the root system is dry around the root system, and the root system grows towards a deeper and wider part, namely the direction of the moist body).
And (3) repeatedly executing Step 1-Step 3, gradually increasing the pressure of the pressurizing device 1, wherein the pressurizing strength is higher than the last pressurizing strength every time, so that the irrigation depth is pushed to move to a deeper position along with the growth of the root system, the necessary water of the crop can be ensured, the growth of the root system of the crop is guided, the development of the root system is promoted, and the water utilization efficiency is improved.
Furthermore, the irrigation method for guiding the root system to grow and the variable-depth underground irrigation device can be independently separated, namely the irrigation method for guiding the root system to grow can be realized by matching with other irrigation devices, and the variable-depth underground irrigation device can also be used by matching with other irrigation methods.
As shown in figure 1, a main pipe 2 is connected with a pressurizing device 1, laid on the soil surface 4, and a closed branch pipe 5 structure and an open branch pipe 8 are buried underground.
The structure of the closed branch pipe 5 mainly comprises a sliding piston 6, a sliding cavity 7 and a cylindrical runner 11, wherein the sliding piston 6 is tightly attached to the inner wall of the closed branch pipe 5 and slides in the sliding cavity 7; the structure of the branch pipe 8 with the opening mainly comprises a water storage bin 9, a shunt pipe 10, a hollow piston 12, an annular emitter 13 and a closed piston 15, wherein the water storage bin 9 is communicated with a cylindrical flow passage 11 and the shunt pipe 10, the shunt pipe 10 is connected with the annular emitter 13, the annular emitter 13 is provided with a water outlet 14, the outer wall of the branch pipe 8 with the opening is provided with a water filling hole 16, as shown in figure 2, the reference number 18 on the branch pipe 8 with the opening indicates the upper limit of the opening of the branch pipe with the opening. The operation of the pressurizing means 1 can be controlled manually or by computer. The pressurizing device 1 pressurizes to push the sliding piston 6, so as to drive the cylindrical runner 11, the water storage bin 9, the shunt pipe 10 and the annular irrigator 13 to move, and control the water outlet depth and the wetting radius of the perforated branch pipe 8.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes and modifications can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
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| DE959956C (en) * | 1955-06-14 | 1957-03-14 | Ruhr Stickstoff Ag | Floor lance with piston pump and several tips |
| FR2360812A1 (en) * | 1976-07-07 | 1978-03-03 | Stubenruss Paul | Water distributor valve with automatic actuation - has piston oscillated by spring and water forces to open valve and rotate single aperture flange above multi-aperture outlet plate |
| CN102405792B (en) * | 2011-09-13 | 2013-04-24 | 宁波市鄞州千峰机械科技有限公司 | Speed-control type plant culture device |
| CN103766061B (en) * | 2014-01-16 | 2016-04-27 | 梁玉祥 | A kind of efficient no-tillage irrigation and seeding apparatus and irrigation, type of seeding |
| KR101473152B1 (en) * | 2014-04-29 | 2014-12-15 | 곽창환 | Bag for vegetation |
| CN106804396A (en) * | 2015-11-28 | 2017-06-09 | 重庆上田生态农业开发有限公司 | Fertilizer applicator for fruit trees |
| CN205727404U (en) * | 2016-06-23 | 2016-11-30 | 杭州申华景观建设有限公司 | Underground drip irrigation device |
| CN109287441B (en) * | 2018-10-31 | 2023-08-22 | 福建省恒鼎建筑工程有限公司 | Variable flow irrigation system capable of pressing salt |
| CN211241149U (en) * | 2019-11-08 | 2020-08-14 | 宁夏大学 | Root system adaptive layering variable flow underground infiltrating irrigation emitter |
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