CN109392400A - A kind of Negative pressure irrigation water system for greenhouse field - Google Patents
A kind of Negative pressure irrigation water system for greenhouse field Download PDFInfo
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- CN109392400A CN109392400A CN201811398176.1A CN201811398176A CN109392400A CN 109392400 A CN109392400 A CN 109392400A CN 201811398176 A CN201811398176 A CN 201811398176A CN 109392400 A CN109392400 A CN 109392400A
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- water
- pipe
- negative pressure
- irrigation
- aqueduct
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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
- A01C23/007—Metering or regulating systems
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
Abstract
The embodiment of the present invention discloses a kind of Negative pressure irrigation water system for greenhouse field.It include: water source device, aqueduct and negative pressure double water pipe, wherein the quantity of water source device is 2, is located at target irrigation district two sides；The quantity of aqueduct is multiple, multiple aqueducts are in turn connected into water-main by triple valve, and sequentially connected aqueduct runs through the irrigation district Wen Peng Zhong Long and ditch, wherein, first aqueduct is connected with the water source device of side, the last one aqueduct is connected with the water source device of the other side；The quantity of negative pressure double water pipe be it is multiple, positioned at water-main road two sides and be embedded in the ridge Wen Peng, connect with water-main road by triple valve；Water source device includes: water butt, irrigation water draft regulator, irrigation water gas-guide tube.With the application of the invention, can be precisely controlled on greenhouse scale to root region soil moisture content, and then improve Crop Water Use Efficiency.
Description
Technical field
The present invention relates to the micro- infiltration irrigation technologies in agriculture underground more particularly to a kind of Negative pressure irrigation for greenhouse field for water system
System.
Background technique
Earth freshwater resources at least 2/3 are agricultural waters.Most area in the world, agricultural irrigation water are excessive
Exploitation and use.Freshwater resources are in short supply have become restrict the development of world's major part arid and semi-arid lands it is primary because
Element.China is a Water Resources Restriction country, and freshwater resources amount is 1/4 that the world is worth per capita per capita, per capita far below the world
Water resources quantity.In recent years, domestic Available water resources were sharply declining, as human resources are reduced, energy shortage situation
How aggravation improves automation, the Mechanization Level of China's irrigation technique, promotes agricultural production efficiency, is to develop China's modern times
The problem of agriculture overriding concern.Wherein, it depends on science and technology innovation, promoting negative pressure energy-saving water delivery is to alleviate or solve China's agricultural water shortage
Status walks the effective technology means for developing water-saving modern agriculture road.
Negative pressure irrigation is a kind of new type auto supply water-saving irrigation technique that douche is embedded in underground, is supplied water by control
Negative pressure, can make crop throughout the growing season, soil water potential can keep and supply water the dynamic equilibrium of negative pressure, to realize
Continuous automatic acquisition of the crop to moisture.Since negative pressure energy-saving water delivery does not destroy soil texture, can make soil internal water,
Fertilizer, air and heat keep the good condition for being suitable for crop growth；Meanwhile evaporation loss is small, does not generate surface runoff, irrigation quantity
Small, perdurabgility of once pouring water is longer, and water utilization rate is high；Moreover, negative pressure energy-saving water delivery is generated with crop water consumption
Negative pressure (flow of water is poor) is the active pressure of crop water suction, it is thus possible to which accurately Controlled irrigation amount can be reduced between invalid
Evaporation, greatly reduces the waste of water.
Fig. 1 is existing Negative pressure irrigation water system structural schematic diagram.Referring to Fig. 1, which includes: to fill
Hydrophone 11, water-supply-pipe 12, water butt 13 and negative pressure generator 14.Wherein,
Douche 11 is embedded in soil (matrix), is the vitrified-clay pipe of a kind of " permeable airtight ".
Water level pipe 131 is installed, for measuring the variation of inner bucket water position (h1) on water butt 13.
Negative pressure generator 14 consists of three parts, and is respectively as follows: solenoid valve 141, pressure control switch 142 and gas tank 143, negative pressure
Generator 14 is connected with water butt 13 by gas pipeline 15, and air is full of in gas pipeline 15.
Pressure control switch 142 is set for scheduled negative pressure to be arranged when the pressure in gas tank 143 reaches pressure control switch 142
Fixed negative pressure, so continue decline when, pressure control switch 142 trigger solenoid valve 141 so that outside air pass through solenoid valve 141
Into gas tank 143.When the pressure of the air entered in gas tank 143 is greater than the negative pressure that pressure control switch 142 is set, electromagnetism
Valve 141 is closed, and thus can guarantee that 143 internal pressure of gas tank is stablized.Since Negative pressure irrigation water system is sealing and gas
Air is full of in pipeline and gas tank, thus, the negative pressure being arranged on pressure control switch in gas tank and the pressure phase in vitrified-clay pipe
Deng.According to Soil Moisture Dynamics principle, vitrified-clay pipe is embedded in soil, it is poor by the water potential gradient between soil and vitrified-clay pipe,
When the water flow in vitrified-clay pipe enters soil, the water level decreasing in water butt causes pressure in water butt to reduce, scheduled when being less than
When negative pressure, the gas in negative pressure generator enters water butt, so that whole system pressure maintains a dynamic balance state.Its
In, scheduled negative pressure is known as delivery head (water supply negative pressure), can control soil water-containing by changing scheduled negative pressure
Amount.
But existing Negative pressure irrigation water system, since irrigation water itself contains certain gas, existing negative pressure fills
During irrigating, as irrigation water penetrates into root region soil from seepage controllor, the gas in irrigation water rests on the water-supply-pipe of irrigation system
It is interior, if gas can not effectively exclude irrigation system in time, air column can be generated in water-supply-pipe, to block the stream of irrigation water
It is dynamic, cause irrigation water not supply water in time to crop, Negative pressure irrigation is caused to fail；Also, what current Negative pressure irrigation system used
Negative pressure seepage controllor can only for the plant growth in small area, if expand water supply coverage project cost will be greatly improved,
And the usage amount of the single negative pressure seepage controllor in one piece of ground is excessive, and it is inconvenient uneven with water supply to will lead to management；Existing negative pressure fills
Irrigating water-fertilizer integral system, there are pressure of supply water to fluctuate in a certain range, the constant of water supply pressure cannot be maintained, thus cannot
Guarantee that crops are grown in always under stable Soil Moisture.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of Negative pressure irrigation water system for greenhouse field, it can be in temperature
Root region soil moisture content is precisely controlled on the scale of room, and then improves irrigation water utilization efficiency.
Negative pressure irrigation water system provided in an embodiment of the present invention for greenhouse field, comprising: water source device, aqueduct
With negative pressure double water pipe, wherein
The quantity of water source device is 2, is located at target irrigation district two sides；
The quantity of aqueduct be it is multiple, multiple aqueducts are in turn connected into water-main road by triple valve, successively
The water-main road of connection runs through the irrigation district Wen Peng Zhong Long and ditch, wherein and first aqueduct is connected with the water source device of side,
The last one aqueduct is connected with the water source device of the other side；
The quantity of negative pressure double water pipe be it is multiple, positioned at water-main road two sides and be embedded in the ridge Wen Peng, it is defeated with master
Waterpipe is connected by triple valve；
Water source device includes: water butt, irrigation water draft regulator and irrigation water gas-guide tube, wherein
One end of irrigation water gas-guide tube is connected with water butt bottom, is connected at the top of the other end and irrigation water draft regulator
It is logical；
Irrigation water draft regulator, including the first sealing container and the first air inlet pipe are equipped in the first sealing container
Water, the first air inlet pipe are hollow direct piping, by the water level for being inserted into the first sealing container at the top of the first sealing container
Interior, water-head is pre-set first negative pressure water-head threshold between water level in the first air inlet bottom of the tube and the first sealing container
Value；
It is connected in the irrigation water gas-guide tube at the top of water butt bottom and irrigation water draft regulator and forms liquid-gas interface；
Water butt bottom also passes through outlet conduit and is connected with aqueduct.
Optionally, water source device water butt is accessed in first aqueduct one end in water-main road, and the other end accesses threeway
Valve, other two interface of triple valve are connected with the second aqueduct and negative pressure double water pipe, remaining negative pressure double water pipe and defeated
Water pipe is sequentially connected by triple valve；
Optionally, the junction center of the outlet conduit of the water butt and first aqueduct is higher than in aqueduct
Heart point 3-5cm.
Optionally, the first gas for being connected with irrigation water gas-guide tube opened up in first sealing container is adjusted
The position in hole is higher than the water level in water butt.
Optionally, the position of the first gas adjustment hole is higher than the water inlet of water butt.
Optionally, the water level in first sealing container is lower than first gas adjustment hole.
Optionally, in the aqueduct company with the connectivity part of negative pressure double water pipe, irrigation water gas-guide tube and water butt respectively
The place of connecing, irrigation water gas-guide tube are inserted into first with the place that is connected of the first sealing container, the water inlet of water butt, the first air inlet pipe
At sealing container, it is sealed using sealing ring.
Optionally, the aqueduct include: the first water-supply-pipe, second support water pipe, third water-supply-pipe, delivery hose with
And steel wire mesh frame polyvinyl formal PVFM multiple tube, wherein
First water-supply-pipe slant setting, third water-supply-pipe is horizontal positioned, and the second support water pipe is placed vertically, steel wire mesh frame
PVFM multiple tube is embedded in the soil, to soil with predetermined negative pressure water supply；
It is connected at the top of first water-supply-pipe with external water butt, the first water-supply-pipe is also connected with the second support water pipe, the
Two support water pipes are connected with third water-supply-pipe, and third water-supply-pipe is connected with delivery hose, delivery hose and steel wire mesh frame
PVFM multiple tube is connected.
Optionally, first water-supply-pipe and third water-supply-pipe are in 3 ° of -5 ° of angles.
Optionally, the steel wire mesh frame PVFM multiple tube includes: interior hard layer, middle reinforcement layer and outer soft layer,
Wherein,
Interior hard layer makes to form hollow pipeline using hard PVFM material, and middle reinforcement layer is rigid for reinforced composite pipe
The steel wire compartment of degree and intensity covers interior hard layer, and outer soft layer makes to be formed using soft PVFM material, covers intermediate increase
Strong layer.
A kind of Negative pressure irrigation water system for greenhouse field provided in an embodiment of the present invention, comprising: water source device, water delivery
Pipeline and negative pressure double water pipe, wherein the quantity of water source device is 2, is located at target irrigation district two sides；The quantity of aqueduct is
Multiple, multiple aqueducts are in turn connected into water-main road by triple valve, and sequentially connected aqueduct runs through warm canopy and fills
Irrigate area Zhong Long and ditch, wherein first aqueduct is connected with the water source device of side, the last one aqueduct and the other side
Water source device is connected；The quantity of negative pressure double water pipe be it is multiple, positioned at water-main road two sides and be embedded in the ridge Wen Peng；It constitutes
First aqueduct one end access water source device aqueduct in water-main road and fertilizer pipeline junction, other end access three
Port valve, other two interface of triple valve are connected with the second aqueduct and negative pressure double water pipe, remaining negative pressure double water pipe and
Water-supply-pipe is sequentially connected by triple valve；Water source device includes: water butt, irrigation water draft regulator and irrigation water gas-guide tube,
Wherein, one end of irrigation water gas-guide tube is connected with water butt bottom, is connected at the top of the other end and irrigation water draft regulator；
Irrigation water draft regulator, including the first sealing container and the first air inlet pipe, are equipped with water in the first sealing container, first into
Tracheae is hollow direct piping, by being inserted into the water level of the first sealing container at the top of the first sealing container, first into
The water-head of water level is pre-set first negative pressure water-head threshold value in tracheae bottom and the first sealing container；It is connected to water storage
Liquid-gas interface is formed in irrigation water gas-guide tube at the top of bucket bottom and irrigation water draft regulator；Water butt bottom also passes through out
Waterpipe is connected with aqueduct.In this way, utilizing crop moisture physiological property and soil without extraneous pressurization power device
Earth tensile property realizes that crops are continuous to moisture, automatic acquisition, avoids irrigation water caused by the extraneous pressure control error pressurizeed
Utilization efficiency is not high, and realization is precisely controlled root region soil moisture content on greenhouse scale, improves irrigation water utilization efficiency, and
It ensures that the hydraulic pressure to supply water to crops remains constant, makes crop growth under stable Soil Moisture.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is existing Negative pressure irrigation water system structural schematic diagram；
Fig. 2 is the Negative pressure irrigation water system overlooking structure diagram that the embodiment of the present invention is used for greenhouse field；
Fig. 3 is the water source device structural schematic diagram of the embodiment of the present application；
Fig. 4 is the negative pressure double water pipeline configuration schematic diagram of the embodiment of the present invention；
Fig. 5 is steel wire mesh frame of embodiment of the present invention PVFM composite pipe structure schematic diagram.
Specific embodiment
The embodiment of the present invention is described in detail with reference to the accompanying drawing.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the embodiment of the present application, it is obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
It should be noted that negative pressure described in the embodiment of the present invention, is for atmospheric pressure, i.e., in the described system
The air pressure of the relative value of pressure and atmospheric pressure, since native this system delivery head is less than atmospheric pressure, thus it is also referred to as negative
Pressure is irrigated.
In the embodiment of the present invention, soil water potential is a kind of natural quality that soil has, i.e., in most natural situations
Under, the movement of soil nutrient in the soil relies primarily on soil moisture as medium, moisture place flow direction always high from potential energy
The low place of potential energy, dissolved fertilizer is depending mainly on water distribution.Thus, can moisture and nutrient flow to crop root system, farming
Object can effectively be absorbed into moisture and nutrient, and the flow of water depended entirely between soil water potential and the crops flow of water is poor.Pass through
It irrigates, soil water potential can be promoted, if may be implemented by providing different soils moisture content corresponding soil water potential to soil
Soil moisture content is precisely controlled, so as to meet crop different growth stage to the needs of soil moisture, meanwhile, it can be with
Guarantee that specific period crops are grown in always under stable Soil Moisture.
Fig. 2 is the Negative pressure irrigation water system overlooking structure diagram that the embodiment of the present invention is used for greenhouse field.Referring to figure
2, which includes: water source device 21, aqueduct 22 and negative pressure double water pipe 23, wherein
The quantity of water source device 21 is 2, is located at target irrigation district two sides, i.e., in the boundary Wen Peng；
Constitute water-main road 22 aqueduct quantity be it is multiple, multiple aqueducts 22 are successively connected by triple valve 24
Connect, Wen Peng ridge 25 and ditch 26 of the sequentially connected water-main road 22 in the irrigation district, wherein first aqueduct 22 with
The water source device 21 of side is connected, the last one aqueduct 22 is connected with the water source device 21 of the other side；
The quantity of negative pressure double water pipe be it is multiple, positioned at water-main road 22 two sides and be embedded in the ridge Wen Peng 25, with
Water-main road is connected by triple valve 24；
Fig. 3 is the water source device structural schematic diagram of the embodiment of the present application.As shown in figure 3, in the embodiment of the present application, it can as one
Embodiment is selected, water source device includes: water butt 31, irrigation water draft regulator 33 and irrigation water gas-guide tube 35, wherein
One end of irrigation water gas-guide tube 35 is connected with 31 bottom of water butt, and the other end and irrigation water draft regulator 33 push up
Portion is connected；
Irrigation water draft regulator 33, including the first sealing container 331 and the first air inlet pipe 332, the first sealing container
Water is equipped in 331, the first air inlet pipe 332 is hollow direct piping, by being inserted into first at the top of the first sealing container 331
In the water level of sealing container 331, the water-head of water level is pre- in 332 bottom of the first air inlet pipe and the first sealing container 331
The first negative pressure water-head threshold value being first arranged；
It is connected in the irrigation water gas-guide tube 35 at 33 top of 31 bottom of water butt and irrigation water draft regulator and forms gas-liquid point
Interface；
31 bottom of water butt also passes through outlet conduit and is connected with aqueduct 22.
In the embodiment of the present application, water butt 31 is closed air tight.
In the embodiment of the present application, in one end access water source device 21 of first aqueduct 22, the other end passes through triple valve
It is connected with double water pipe；
In the embodiment of the present application, for agricultural irrigation area, since the distance that aqueduct 22 is laid with is longer, there are certain
Depth displacement.Therefore, inconsistent in order to reduce system water supply head caused by depth displacement, by the head and the tail both ends of aqueduct 22
One water source device of each setting can guarantee that system more uniformly supplies water and fertilizer in this way, and in the presence of depth displacement, logical
Setting double water source device is crossed, the discharge of bubble in aqueduct 22 is more conducive to.More preferably, the embodiment of the present application is applied to greenhouse
Greenhouse.
In the embodiment of the present invention, as an alternative embodiment, water inlet 310 is provided at the top of water butt 31, for storing up
When water level in bucket 31 is lower than pre-set water level threshold value, into water butt 31 plus water is intake after having added water
Mouth 310 is closed.
In the embodiment of the present application, as an alternative embodiment, the outlet conduit of water butt 31 and first aqueduct 22
Junction center be higher than 22 central point 3-5cm of aqueduct to ensure preferable irrigation effect, can with laser leveler into
The row elevation measurement.
In the embodiment of the present invention, as an alternative embodiment, in the connection with negative pressure double water pipe respectively of aqueduct 22
Place, irrigation water gas-guide tube 35 are connected with the junction of water butt 31, irrigation water gas-guide tube 35 with the first sealing container 331
Place, the water inlet of water butt 31, the first air inlet pipe 332 are inserted at the first sealing container 331, are carried out using sealing ring 312
Sealing.
In the embodiment of the present invention, as an alternative embodiment, when irrigation water draft regulator 33 brings into operation in order to prevent,
In the case where water butt 31 fills water, the water in water butt 31 may enter irrigation water negative pressure along irrigation water gas-guide tube 35 and adjust
Device 33, to influence the degree of regulation of irrigation water draft regulator 33, in the embodiment of the present invention, setting irrigation water gas-guide tube 35 with
First sealing container 331 be connected place position be higher than water butt 31 in water level height.That is it is opened in the first sealing container 331
If the first gas adjustment hole for being connected with irrigation water gas-guide tube 35 position be higher than water butt 31 in water level.
Preferably, the position in the gas regulation hole is higher than the water inlet of water butt 31.
In the embodiment of the present invention, as another alternative embodiment, water is poured into irrigation water draft regulator 33, guarantees water
Under conditions of position is lower than first gas adjustment hole on 33 side wall of draft regulator, day and night temperature is to draft regulator 33 in order to prevent
The pressure controlled has an impact, and improves control crystal's degree of Negative pressure irrigation system, and the nothing in irrigation water draft regulator 33 is arranged
Hydrospace is small as far as possible, i.e., water level is as far as possible close to first gas adjustment hole in setting irrigation water draft regulator 33.
Gas in the embodiment of the present invention, as an alternative embodiment, in the first sealing container 331 in water level upper space
Body pressure is less than or equal to atmospheric pressure.It is inserted into the first sealing container 331 under water level by changing the first air inlet pipe 332
Highly (h4), so as to adjust the water level of water level in the liquid-gas interface of 332 bottom of the first air inlet pipe and the first sealing container 331
Difference, can control the gas pressure intensity (air pressure) in the first sealing container 331 in water level upper space, and then control system is to soil
Earth supplies water, so as to control the soil water potential within the scope of certain soil, so that set by soil water potential and the first air inlet pipe 332
Delivery head (the first negative pressure water-head threshold value) it is consistent.Since soil water potential is related to soil moisture content, thus, pass through by
Soil water potential maintains a certain value, i.e., by adjusting between 332 bottom of the first air inlet pipe and 331 water level of the first sealing container
Difference in height may be implemented to be precisely controlled soil moisture, and then provides most suitable soil in the different growthdevelopmental stage of crop and contain
Water rate.
In the embodiment of the present application, soil water potential is that the water supply negative water pressure that system provides is strong, and size is equal in aqueduct 22
Hydraulic pressure, and the hydraulic pressure in aqueduct 22, equal to the gas pressure intensity in irrigation water gas-guide tube 35.Adjusted in the negative pressure of sealing
In system, in the irrigation water gas-guide tube 35 between water butt 31 and irrigation water draft regulator 33, it is full of air, thus, it bears
Press at 22 position of aqueduct of irrigation system, aqueduct 22 and the place that is connected of water butt 31, irrigation water gas-guide tube 35 and
The place that is connected of be connected place and the irrigation water gas-guide tube 35 and irrigation water draft regulator 33 of water butt 31, pressure are homogeneous
Deng, and in the pressure and 332 bottom of the first air inlet pipe to the first sealing container 331 in the first gas-guide tube 35 water level height
(h4) equal.Thus, it is inserted into the height in the first sealing container 331 under water level by controlling the first air inlet pipe 332, it can be with
It controls water supply negative water pressure by force (pressure in water-main 22), holds soil moisture content surely in suitable content.
Fig. 4 is the aqueduct structural schematic diagram of the embodiment of the present invention, as shown in figure 4, the aqueduct includes: first defeated
Water pipe 41, second supports water pipe 42, third water-supply-pipe 43, delivery hose 44 and steel wire mesh frame polyvinyl formal
(PVFM, Polyvinyl formal) multiple tube 45, wherein
First water-supply-pipe slant setting, third water-supply-pipe is horizontal positioned, and the second support water pipe is placed vertically, steel wire mesh frame
PVFM multiple tube is embedded in the soil, to soil with predetermined negative pressure water supply；
It is connected at the top of first water-supply-pipe with water-main road 22, the first water-supply-pipe is also connected with the second support water pipe,
Second support water pipe is connected with third water-supply-pipe, and third water-supply-pipe is connected with delivery hose, delivery hose and steel wire bone
Frame PVFM multiple tube is connected.
In the embodiment of the present application, tilted-putted first water-supply-pipe can lead to the gas risen at the top of the first water-supply-pipe
It crosses the first gas-guide tube 332 and is expelled to atmosphere, and input irrigation water or solution from water butt 31 or solution bucket 32.First water-supply-pipe inclines
Tiltedly to place, the gas for being conducive to generate in each water-supply-pipe rises at the top of the first water-supply-pipe and is discharged by the first gas-guide tube 332,
Air column is not generated in water-supply-pipes at different levels, so that the influence of air column obstruction irrigation water and the negative pressure to setting is avoided, it can be effective
Lifting negative pressure irrigation efficiency and Negative pressure irrigation precision.And it is parallel to the ground to be arranged third water-supply-pipe, can in water-pouring process,
Ensure to steel wire mesh frame PVFM multiple tube supply water the flow of water be identical, thus ensure that steel wire mesh frame PVFM multiple tube to
The uniformity of soil water supply.
In the embodiment of the present application, as an alternative embodiment, the first water-supply-pipe and third water-supply-pipe are in 3 ° of -5 ° of angles, from
And the gas generated in each water-supply-pipe can be conducive to, rise at the top of the first water-supply-pipe and be discharged outside water-supply-pipe, in water-supply-pipe
In do not generate air column.
In the embodiment of the present application, polyvinyl formal is high-molecular organic material, and having aperture is supplemented by main macropore
Foam structure, thus, hydrophily is very good, water absorbing capacity is strong, and chemical stability is good and wear resistance is good.Thus, utilize suction
The strong PVFM of outlet capacity is contacted as Negative pressure irrigation seepage controllor and with soil, can greatly improve the seepage of water of traditional seepage controllor
Can, and blocking of the soil particle to Negative pressure irrigation seepage controllor is effectively prevented, and there is preferable toughness, it can be avoided operation
Being crushed in the process, to reduce the replacement number of seepage controllor, reduces the cost of Negative pressure irrigation, is conducive to the cloth of field pipeline
It sets.
Fig. 5 is steel wire mesh frame of embodiment of the present invention PVFM composite pipe structure schematic diagram.As shown in figure 5, optional as one
Embodiment, steel wire mesh frame PVFM multiple tube include: interior hard layer 51, middle reinforcement layer 52 and outer soft layer 53, wherein
Interior hard layer makes to form hollow pipeline using hard PVFM material, and middle reinforcement layer is rigid for reinforced composite pipe
The steel wire compartment 54 of degree and intensity covers interior hard layer, and outer soft layer makes to be formed using soft PVFM material, and covering is intermediate
Enhancement layer.
As an alternative embodiment, in order to guarantee that multiple tube seeps water gastight characteristic under water-filled state, production
The foaming point value of the hard PVFM material of interior hard layer is not less than 20kPa, makes the foaming of the soft PVFM material of outer soft layer
Point value is not less than 30kPa.
It does not influence to supply water while crushing resistance in order to increase steel wire mesh frame PVFM multiple tube, makes middle reinforcement layer
The mesh area of steel wire grid is arranged in 4-50mm2Between, the gauge of wire for making steel wire grid is 2mm (No. 18).
As another alternative embodiment, in order to guarantee the steel wire mesh frame PVFM multiple tube contact area suitable with soil,
Guarantee multiple tube simultaneously in the gastight characteristic of working condition infiltration, the compound bore of steel wire mesh frame PVFM is 14mm, outer diameter
For 16mm, anti-suction strength is higher than 30kPa.
In the embodiment of the present application, the lose-lose water pipe with the first water-supply-pipe and third water-supply-pipe, wherein the first water-supply-pipe was both
It can be downward grade pipe (third water-supply-pipe and the second support water pipe) water delivery, can also irrigated using air bubble or air column
There is the characteristic moved up in water, it, can be by the gas of the water-supply-pipe of each connection generation by the way that the first water-supply-pipe is in tilted layout
Body is smoothly discharged.Horizontal positioned third water-supply-pipe can guarantee to manage (PE delivery hose and steel wire mesh frame PVFM to junior
Multiple tube) supply water the water delivery flow of water it is consistent, and then guarantee enter steel wire mesh frame PVFM multiple tube in the flow of water it is consistent, be conducive to
Uniformly supply water.
In the embodiment of the present application, as an alternative embodiment, water butt further include: the water level for being used to indicate water content consumption is seen
Test tube 313, water-level observation pipe 313 are external in water butt 31, and one end of water-level observation pipe is opened up by 31 side wall upper part of water butt
The first water level hole access water butt 31 in, the second water that the other end of water-level observation pipe is opened up by 31 lower sidewall of water butt
In position hole access water butt 31, wherein the second water level hole is parallel or is higher than delivery hole.
As an alternative embodiment, water-level observation pipe is [shape.
In the embodiment of the present application, water-main road 22 crosses Wen Penglong and ditch.
The course of work to the embodiment of the present invention for the Negative pressure irrigation water system in greenhouse field is illustrated below:
After installing the system of the embodiment of the present invention, water butt 31 fills water by water inlet, by inlet seal,
It is filled with the water for adjusting hole site close to first gas in one sealing container, the first air inlet pipe is inserted into the first sealing container
In, the first air inlet pipe bottom end is the first negative pressure water-head threshold value (the first height) at a distance from water level in the first sealing container,
At this point, the water level in the first air inlet pipe is concordant with water level in the first sealing container, the atmospheric pressure in irrigation water gas-guide tube
For atmospheric pressure, air also 31 sidewall bottom of underfill water butt in irrigation water gas-guide tube is connected with irrigation water gas-guide tube
Place.
In system initial launch, the atmospheric pressure in irrigation water gas-guide tube is atmospheric pressure, the pressure of water pipe outlet
Also it is atmospheric pressure, is higher than soil water potential, to drives the water in water butt 31 multiple by water-supply-pipe and steel wire mesh frame PVFM
It closes pipe and penetrates into soil, so that the water level decreasing in water butt 31,31 ullage of water butt occurs space (h3), gas pressure in bucket
It is strong to reduce, so that the air of the first sealing container water level upper space of driving enters water butt 31 by irrigation water gas-guide tube 35
Upper space leans at the position that the water level in irrigation water gas-guide tube is connected to the gas port opened up with 31 sidewall bottom of water butt
Closely；
Sky above water butt 31 is entered by irrigation water gas-guide tube in the air of 331 ullage space of the first sealing container
Between after, in the first sealing container 331 air pressure decline, the atmosphere in the first air inlet pipe communicated with atmosphere, drive the first air inlet pipe
Interior water level decline, so that water-head is generated with liquid level in the first sealing container, so that air pressure and the water in sealing container
The sum of pressure that potential difference generates is equal to atmospheric pressure；
With in water butt 31, water via irrigation water aqueduct and steel wire mesh frame PVFM multiple tube enters Crop Root
Be in soil, soil moisture content gradually rises, and corresponding soil water potential gradually rises, irrigation water air guide intraductal atmospheric pressure gradually under
Drop；
Although soil water potential is still higher than, so that the water level in water butt 31 at this point, irrigation water air guide intraductal atmospheric pressure declines
Continue to decline, the air of the first sealing container ullage space is persistently driven to enter on water butt 31 by irrigation water gas-guide tube
Side space is connected so that the air in irrigation water gas-guide tube is filled to the gas port opened up with 31 lower sidewall of water butt
Position at, atmosphere in the first air inlet pipe drives the water level in the first air inlet pipe to continue to decline, until in the first air inlet pipe
Water level drops to the first air inlet pipe bottom end, the water level that water level is generated with water level in the first sealing container in the first air inlet pipe
When difference reaches the first height (the first negative pressure water-head threshold value), the pressure in the first sealing container upper space becomes steady state value,
I.e. the delivery head of system is steady state value at this time, since the soil moisture content of system water supply crop root system soil increases, works as increasing
When arriving certain value greatly, soil water potential corresponding with the soil moisture content is consistent with system water supply head, then reaches dynamic equilibrium, stores up
Bucket 31 stops to soil water supply, and system enters steady operational status；
During the stable operation of system, due to the evaporation or transpiration of crops, root system surrounding soil can be caused again
The reduction of water content when the corresponding threshold value pressure of i.e. the first negative pressure water-head threshold value, generates the flow of water when being lower than system water supply negative pressure
Difference, driving steel wire mesh frame PVFM multiple tube 45 is to soil water supply, and the water level decreasing caused in water butt 31 that supplies water, system supply
Water negative pressure declines, and atmospheric pressure is greater than system water supply negative pressure in irrigation water gas-guide tube, thus in the first sealing container 331 of driving
Air enters 31 upper space of water butt along irrigation water gas-guide tube, with the position for maintaining water butt 31 to be connected with aqueduct
The pressure equilibrium at position that place, water butt 31 are connected with irrigation water negative pressure generator, and at this moment due to the first sealing container
Pressure in 331 is reduced, and can enter a certain amount of air from the first air inlet pipe 332, so that whole system maintains a dynamic and puts down
During weighing apparatus, to complete a cyclic process.In this way, system water supply negative pressure when changing at the beginning, can drive first
Air inlet pipe 332, into the first sealing container, to maintain system water supply negative pressure constant, can guarantee farming from outside sucking air
Object is grown in always under the conditions of stable soil moisture (constant soil moisture content), realizes crops to the company of water and nutrient
Continuous, automatic, stability contorting.
In the embodiment of the present invention, due to the air pressure in irrigation water gas-guide tube be always more than or be equal to soil moisture content it is corresponding
Soil water potential, so that air can only enter water butt 31 from irrigation water gas-guide tube, i.e. 31 upper space of water butt is constantly in from phase
Answer the state of gas-guide tube air-breathing.
In the embodiment of the present invention, system can be negative by adjusting irrigation water according to the law of needing the water of crops different phase
Press the size of the water-head of the first air inlet pipe bottom position and the water level position in the first sealing container in adjuster, Ke Yixiang
Crop provides suitable water supply and for fertilizer amount.
In the embodiment of the present invention, if system when not irrigated, has the water of certain water level in the first air inlet pipe, and
Water level and water level in the first sealing container are contour in first air inlet pipe.When supplying water, due to atmospheric pressure in irrigation water gas-guide tube
It reduces, to maintain the pressure that atmospheric pressure and difference in height generate in irrigation water gas-guide tube to be equal to atmospheric pressure, needs to increase difference in height,
So that in irrigation water gas-guide tube the sum of atmospheric pressure and the pressure of water-head be equal to atmospheric pressure, due to the first air inlet pipe caliber compared with
Small, the first sealing container caliber is small, so that the water in the first air inlet pipe with water level is drained quickly, and is drained into the first sealing
Water in container can ignore the water level influence in the first sealing container, to quickly make the air in irrigation water gas-guide tube
Pressure forms constant pressure.
In the embodiment of the present invention, if the soil moisture content of crop culture is lower, the time needed for forming pressure constant state
Also shorter, to realize during irrigation, atmospheric pressure in irrigation water gas-guide tube can automatic adjusument, without to irrigation
Atmospheric pressure in water gas-guide tube carries out manually or mechanically formula and adjusts.
The Negative pressure irrigation water system for greenhouse field of the embodiment of the present invention has the advantage that as follows:
(1), energy saving；
The embodiment of the present invention is without extraneous pressurization power device, by utilizing crop moisture physiological property and soil
Force characteristic realizes that crops are continuous to moisture, automatic acquisition, and ensures that the hydraulic pressure to supply water to crops remains constant, makes agriculture
Plant growth is under stable Soil Moisture.
(2), the irrigation suitable for tomato different growing stage；
The embodiment of the present invention can be irrigated according to the water requirement of tomato different times, for tomato in different growing stage
It is different to soil appropriate aqueous amount demand, it is adjustable by changing the difference in height of liquid level in air inlet pipe and sealing container
System water supply negative pressure carries out the water supply of timely and appropriate discovery to crops in different growing stage.
(3), clogging when irrigating is avoided；
In the embodiment of the present invention, Negative pressure irrigation liquid-penetrating device uses permeable air-locked PVFM multiple tube, can significantly improve
Blockage problem of the soil particle to douche.
(4), increase for water area, be conducive to system popularization.
Compared with traditional negative pressure seepage controllor, the novel steel wire network framework PVFM multiple tube in the embodiment of the present application avoids biography
System negative pressure seepage controllor is only the shortcomings that one plant or two plants of crops water supply, can supply water for a full line crop in greenhouse, greatly
Being uniformly distributed for soil moisture is improved, the popularization of farmland management and this system is more advantageous to.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (10)
1. a kind of Negative pressure irrigation water system for greenhouse field characterized by comprising water source device, aqueduct and negative
Press double water pipe, wherein
The quantity of water source device is 2, is located at target irrigation district two sides；
The quantity of aqueduct be it is multiple, multiple aqueducts are in turn connected into water-main road by triple valve, are sequentially connected
Aqueduct run through the irrigation district Wen Peng Zhong Long and ditch, wherein first aqueduct is connected with the water source device of side, last
A aqueduct is connected with the water source device of the other side；
The quantity of negative pressure double water pipe be it is multiple, positioned at water-main road two sides and be embedded in the ridge Wen Peng, with water-main
Road is connected by triple valve；
Water source device includes: water butt, irrigation water draft regulator and irrigation water gas-guide tube, wherein
One end of irrigation water gas-guide tube is connected with water butt bottom, is connected at the top of the other end and irrigation water draft regulator；
Irrigation water draft regulator, including the first sealing container and the first air inlet pipe are equipped with water in the first sealing container, and
One air inlet pipe is hollow direct piping, by being inserted into the water level of the first sealing container at the top of the first sealing container, the
Water-head is pre-set first negative pressure water-head threshold value between water level in one air inlet bottom of the tube and the first sealing container；
It is connected in the irrigation water gas-guide tube at the top of water butt bottom and irrigation water draft regulator and forms liquid-gas interface；
Water butt bottom also passes through outlet conduit and is connected with aqueduct.
2. the Negative pressure irrigation water system according to claim 1 for greenhouse field, which is characterized in that
Water source device is accessed in first aqueduct one end for constituting water-main road, and the other end accesses triple valve, and triple valve is in addition
Two interfaces are connected with the second aqueduct and negative pressure double water pipe, and remaining negative pressure double water pipe and water-supply-pipe pass through triple valve
It is sequentially connected；
Negative pressure double water pipe mainly has PVC water-supply-pipe, PE delivery hose, triple valve, four-way valve and steel wire mesh frame polyvinyl alcohol
Formal foam (PVFM) multiple tube, wherein the PVC aqueduct is connected by triple valve with four-way valve；
PE delivery hose one end four-way valve is connected with PVC water-supply-pipe, and other end triple valve and steel wire mesh frame PVFM are compound
Pipe is connected；
Three layers of steel wire mesh frame PVFM multiple tube point, internal layer are hard PVFM material, and centre is steel wire grid enhancement layer, and outer layer is
Soft PVFM material is connected with triple valve between multiple tube.
3. the Negative pressure irrigation water system according to claim 1 for greenhouse field, which is characterized in that the water butt
It is higher than aqueduct central point 3-5cm with the junction of first aqueduct.
4. the Negative pressure irrigation water system according to claim 1 for greenhouse field, which is characterized in that described first is close
The position of the first gas adjustment hole for being connected with irrigation water gas-guide tube opened up on envelope container is higher than the water in water butt
Liquid level.
5. the Negative pressure irrigation water system according to claim 4 for greenhouse field, which is characterized in that first gas
The position of body adjustment hole is higher than the water inlet of water butt.
6. the Negative pressure irrigation water system according to claim 4 for greenhouse field, which is characterized in that described first is close
The water level sealed in container is lower than first gas adjustment hole.
7. the Negative pressure irrigation water system according to claim 1 for greenhouse field, which is characterized in that in aqueduct
It is close with the connectivity part of negative pressure double water pipe, the junction of irrigation water gas-guide tube and water butt, irrigation water gas-guide tube and first respectively
Seal the place that is connected of container, the water inlet of water butt, the first air inlet pipe be inserted into the first sealing container at, using sealing ring into
Row sealing.
8. the negative pressure double water pipe according to claim 1 for greenhouse field, which is characterized in that the aqueduct packet
It includes: the first water-supply-pipe (PVC), the second support water pipe (PVC), third water-supply-pipe (PVC), delivery hose (PE) and steel wire bone
Frame polyvinyl formal PVFM multiple tube, wherein
First water-supply-pipe slant setting, third water-supply-pipe is horizontal positioned, and the second support water pipe is placed vertically, steel wire mesh frame PVFM
Multiple tube is embedded in the soil, to soil with predetermined negative pressure water supply；
First water-supply-pipe upper end is connected by four-way valve with water delivery main pipeline, and the first water-supply-pipe is also connected with the second support water pipe
Logical, the second support water pipe is connected with third water-supply-pipe, and third water-supply-pipe is connected with delivery hose, delivery hose and steel wire
Skeleton PVFM multiple tube is connected.
9. the Negative pressure irrigation water system according to claim 8 for greenhouse field, which is characterized in that described first is defeated
Water pipe and third water-supply-pipe are in 3 ° of -5 ° of angles.
10. the Negative pressure irrigation water system according to claim 9 for greenhouse field, which is characterized in that the steel wire
Network framework PVFM multiple tube includes: interior hard layer, middle reinforcement layer and outer soft layer, wherein
Interior hard layer makes to form hollow pipeline using hard PVFM material, middle reinforcement layer be for reinforced composite pipe rigidity and
The steel wire compartment of intensity covers interior hard layer, and outer soft layer makes to be formed using soft PVFM material, covers intermediate enhancing
Layer.
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| CN201811398176.1A CN109392400B (en) | 2018-11-22 | 2018-11-22 | Negative pressure irrigation water supply system for greenhouse fields |
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|---|---|---|---|
| CN201811398176.1A CN109392400B (en) | 2018-11-22 | 2018-11-22 | Negative pressure irrigation water supply system for greenhouse fields |
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