CN205658126U - Negative pressure governing system - Google Patents
Negative pressure governing system Download PDFInfo
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- CN205658126U CN205658126U CN201620452654.2U CN201620452654U CN205658126U CN 205658126 U CN205658126 U CN 205658126U CN 201620452654 U CN201620452654 U CN 201620452654U CN 205658126 U CN205658126 U CN 205658126U
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Abstract
The utility model discloses a negative pressure governing system. Include: sepage ware, aqueduct, reservoir, air duct and negative pressure regulator are irrigated to the negative pressure, and wherein, the one end of aqueduct inserts during the negative pressure irrigates the sepage ware, and drain hole that the other end passes through the reservoir lateral wall is inserted to the reservoir in, the negative pressure is irrigated the sepage ware and is inclined inclined and put, the holding has water in the reservoir, the one end of air duct inserts to the reservoir in through the air guide hole, air guide hole and drain hole site in same horizontal position, and the other end of air duct inserts in the negative pressure regulator, negative pressure regulator comprises sealed container and intake pipe, and the intake pipe is hollow direct pipeline, and through the sealed container top inserting, the holding has water in the sealed container, the negative pressure water head threshold value of water head for setting up in advance of intake pipe bottom to sealed container water -logging liquid level, and the pressure in the air duct equals the atmospheric pressure with the threshold value pressure sum that negative pressure water head threshold value corresponds. Use the utility model discloses, can ensure the water pressure maintain constant who supplies water to crops.
Description
Technical field
This utility model relates to agricultural sub-irrigation technology, particularly to a kind of negative pressure regulation system.
Background technology
In the growth and development process of crops, soil is often difficult to the moisture providing crops required.Therefore, in the modern times
In agricultural production process, supplement, to soil, the important ring that corresponding moisture is farming production and operating activities by irrigating.
Under China's the most unbalanced situation of current distribution of water resources, using Negative pressure irrigation technology is to improve water resource profit
By the effective way of efficiency.Wherein, Negative pressure irrigation technology is to utilize plastic conduit to be filled by the aperture on hollow billet or negative pressure by water
Irrigate head to be transported to crops root soil and carry out the technology of localized irrigation, low-voltage tube can be passed through according to crops water-requiring property
Road and the douche being arranged on low pressure pipeline, by the uniform moisture needed for crops and lentamente instill crops Soil-in-Root
In earth.Soil structure is not destroyed, so that soil internal water, fertilizer, air and heat keep being suitable for crops life due to Negative pressure irrigation
Long good condition；Meanwhile, evaporation loss is little, do not produce surface runoff, irrigation quantity is little, and duration of once pouring water is longer, water
Resource utilization is high；And, Negative pressure irrigation need not Manual pressurizing, is that the negative pressure (flow of water is poor) produced with crop water consumption is for making
The active pressure of thing water suction, it is thus possible to accurately Controlled irrigation amount, can reduce invalid Evaporation among plants, not result in water
Waste.Thus, it is a kind of Water Saving Irrigation Mode being widely used in water-deficient area, is applicable to fruit tree, grain, vegetable, economy
The crops such as crop and warmhouse booth are irrigated,
Fig. 1 is the structural representation of prior art Negative pressure irrigation water adding system.See Fig. 1, this Negative pressure irrigation water adding system
Including: water head 11, water receiver 12 and negative pressure adjusting device 13, wherein,
Negative pressure adjusting device 13 includes: U-tube 21 and negative pressure regulation pipe 22, and wherein, one end of negative pressure regulation pipe 22 is even
Stretching enters in the left side pipe of U-tube 21, and other end connection is stretched in the right side pipe of U-tube 21；
It is the container sealed for depositing the water receiver 12 of water, between water ullage and water receiver top, forms negative pressure
Room, the left side pipe connection of U-tube 21 is stretched in negative pressure chamber, and the right side pipe of U-tube 21 communicates with air, the left side pipe of U-tube 21
In liquid level exceed most the position that negative pressure regulation pipe 22 stretches on the left of U-tube 21 in pipe；
Water head 11 is connected bottom water receiver 12, and being positioned in soil growth has the position of crops root system；
The air presetting pressure it is full of so that the flow of water of water head is higher than making the soil that crop growth is corresponding in negative pressure chamber
The flow of water, is in soil water potential during field capacity less than soil；
The pressure sum of the liquid height difference generation that described default pressure is filled with in U-tube 21 is equal to atmospheric pressure.
In this Negative pressure irrigation water adding system, negative pressure chamber connects with left side pipe, during original state, is filled with water in water receiver,
The pressure sum of the liquid height difference generation that the pressure in negative pressure chamber is filled with in U-tube is equal to atmospheric pressure.
Along with being gradually increased of irrigation time, in water receiver, water liquid level declines, and the negative pressure interior space increases, and pressure reduces,
On the left of the atmospheric pressure driving of right side pipe, intraluminal fluid face rises, and intraluminal fluid face, right side declines, until the pressure in negative pressure chamber and U-tube
The pressure sum that the interior liquid height difference filled produces is equal to atmospheric pressure.
When intraluminal fluid face, right side is decreased below the position lower edge that negative pressure regulation pipe stretches on the right side of U-tube in pipe, along with
In water receiver, the continuation of water liquid level declines, and in negative pressure chamber, pressure reduces further, owing to the liquid in negative pressure regulation pipe is by air
Separating, liquid height difference keeps constant, if the pressure that the pressure in negative pressure chamber produces with the liquid height difference in negative pressure regulation pipe
Strong sum is less than atmospheric pressure, and so, under the driving of atmospheric pressure, the liquid in negative pressure regulation pipe rises along negative pressure regulation pipe, and
By the tube head that stretches on the left of U-tube in pipe inject on the left of in pipe.
After liquid in negative pressure regulation pipe all injects left side pipe, exceed most due to the liquid level in the pipe of left side
Stretch into the position in pipe on the left of U-tube.Thus, negative pressure chamber, left side pipe ullage space, negative pressure regulation pipe are formed even with air
Logical, air enters negative pressure chamber by negative pressure regulation pipe, left side pipe ullage space so that in negative pressure chamber, pressure increases, and increases
Pressure the water in water receiver both can have been driven to enter soil by fertilizing head, it is also possible on the left of driving the liquid level in pipe decline,
So that the liquid level in the pipe of right side rises, until the liquid level in the pipe of right side rises exceeds the second intercommunicating pore, thus cut off air
Enter the path of negative pressure chamber, and make left side pipe liquid level, negative pressure regulation pipe liquid level and right side pipe liquid level reach new dynamic equilibrium,
So move in circles.
But this Negative pressure irrigation water adding system, the hydraulic pressure of water head is the pressure in negative pressure chamber and liquid level in water receiver
And value, the pressure supplied water for water head and should be worth to crops root system, and in managing with negative pressure regulation due to the pressure in negative pressure chamber
Liquid level relevant to the difference in height of liquid level in U-tube, and fluctuate along with the fluctuation of difference in height, thus so that water head
The pressure supplied water to crops root system fluctuates within the specific limits, it is impossible to maintain the constant of water supply pressure, thus it cannot be guaranteed that agriculture
Crop is grown under stable Soil Moisture always.
Utility model content
In view of this, main purpose of the present utility model is to propose a kind of negative pressure regulation system, ensures and supplies to crops
The hydraulic pressure of water remains constant, makes crop growth under stable Soil Moisture, thus realizes root region soil moisture content
Be precisely controlled.
For reaching above-mentioned purpose, this utility model provides a kind of negative pressure regulation system, including: Negative pressure irrigation liquid-penetrating device,
Aqueduct, reservoir, airway and draft regulator, wherein,
One end of aqueduct is linked in Negative pressure irrigation liquid-penetrating device, the drain that the other end is offered by reservoir lower sidewall
Hole accesses in reservoir；
Negative pressure irrigation liquid-penetrating device slant setting, the one end being connected with aqueduct distance earth's surface distance less than the other end away from
Distance from earth's surface；
Reservoir is equipped with water；
One end of airway accesses in reservoir by the gas port that reservoir lower sidewall is offered, gas port and drain
Hole is positioned at same level position, and the other end of airway accesses negative by the gas regulation hole that draft regulator side wall upper part is offered
In pressure actuator；
Draft regulator, is sealed container by one and air inlet pipe forms, and the other end of airway is by sealing container side wall
The gas regulation hole that top is offered is accessed and is sealed in container, and air inlet pipe is the direct piping of hollow, inserts by sealing container top
Enter to sealing in container, seal container contents and be equipped with water, be in advance to sealing the water-head of water liquid level in container bottom air inlet pipe
The negative pressure water-head threshold value arranged, the threshold value pressure sum that the pressure in airway is corresponding with negative pressure water-head threshold value is equal to air
Pressure.
It is preferred that described Negative pressure irrigation liquid-penetrating device is placed in crops root system soil region.
It is preferred that aqueduct respectively with Negative pressure irrigation liquid-penetrating device and reservoir be connected place, airway respectively with
The place that is connected, the water inlet of reservoir and the air inlet pipe of reservoir and sealing container is inserted at sealing container, all profits
Seal with sealing ring.
It is preferred that described Negative pressure irrigation liquid-penetrating device is a permeable air-locked vitrified-clay pipe.
It is preferred that described tilted-putted Negative pressure irrigation liquid-penetrating device and soil water plane are the angle of 1-5 °, and and water guide
The distance on the distance earth's surface, vitrified-clay pipe one end that pipe is connected is less than the distance on other end distance earth's surface.
It is preferred that the water liquid level in described sealing container is less than gas regulation hole.
It is preferred that described reservoir is hydrostatic column with sealing container.
It is preferred that farther include to be provided with the water-level gauge of instruction water content consumption scale, water-level gauge is external in reservoir, water
One end of position meter is accessed in reservoir by the first water level hole that reservoir side wall upper part is offered, and the other end of water-level gauge is by storage
The first water level hole that liquid device lower sidewall is offered is accessed in reservoir, and wherein, the first water level hole is parallel or is higher than delivery hole.
It is preferred that described water level is calculated as [shape.
It is preferred that described air inlet pipe is up provided with altitude scale from bottom.
As seen from the above technical solutions, a kind of negative pressure regulation system that this utility model provides.Including: Negative pressure irrigation oozes
Liquid device, aqueduct, reservoir, airway and draft regulator, wherein, one end of aqueduct is linked into Negative pressure irrigation liquid-penetrating device
In, the delivery hole that the other end is offered by reservoir lower sidewall accesses in reservoir；Negative pressure irrigation liquid-penetrating device slant setting,
The distance on the distance earth's surface, one end being connected with aqueduct is less than the distance on other end distance earth's surface；Reservoir is equipped with water；
One end of airway accesses in reservoir by the gas port that reservoir lower sidewall is offered, and gas port and delivery hole are positioned at same
One horizontal level, draft regulator is accessed in the gas regulation hole that the other end of airway is offered by draft regulator side wall upper part
In, the position that the gas port that the air in airway is filled to offer with reservoir lower sidewall is connected；Draft regulator,
Being sealed container by one and air inlet pipe forms, the other end of airway is by sealing the gas regulation hole that container side wall top is offered
Accessing and seal in container, air inlet pipe is the direct piping of hollow, is inserted in sealing container by sealing container top, seals and hold
It is equipped with water in device, is the negative pressure water-head threshold value pre-set to sealing the water-head of water liquid level in container bottom air inlet pipe,
The threshold value pressure sum that pressure in airway is corresponding with negative pressure water-head threshold value is equal to atmospheric pressure.So, utilize air inlet pipe with
And the container that seals being equipped with water produces constant negative pressure water-head threshold value so that can provide constant to Negative pressure irrigation liquid-penetrating device
Hydraulic pressure (difference of the pressure therewith that atmospheric pressure and negative pressure water-head threshold value produce), thus it is stable to ensure that crops are grown in always
Soil Moisture under.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art Negative pressure irrigation water adding system.
Fig. 2 is that this utility model embodiment negative pressure regulates system structure schematic diagram.
Fig. 3 is the original state schematic diagram of this utility model embodiment negative pressure regulation system.
Fig. 4 is that this utility model embodiment negative pressure regulation system is at the postrun schematic diagram of original state.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing and be embodied as
This utility model is described in further detail by example.
Fig. 2 is that this utility model embodiment negative pressure regulates system structure schematic diagram.See Fig. 2, this negative pressure regulation system bag
Include: Negative pressure irrigation liquid-penetrating device 201, aqueduct 202, reservoir 203, airway 204 and draft regulator 205, wherein,
One end of aqueduct 202 is linked in Negative pressure irrigation liquid-penetrating device 201, and the other end is offered by reservoir lower sidewall
Delivery hole 101 access in reservoir 203；
Negative pressure irrigation liquid-penetrating device 201 slant setting, the distance on distance earth's surface, the one end being connected with aqueduct 202 is less than another
The distance on distance earth's surface, one end；
Being equipped with water in reservoir 203, as an alternative embodiment, top is provided with water inlet 102；
One end of airway 204 accesses in reservoir 203 by the gas port 103 that reservoir 203 lower sidewall is offered,
Gas port 103 and delivery hole 101 are positioned at same level position, and the other end of airway 204 is by draft regulator 205 sidewall
The gas regulation hole 104 that portion offers is accessed in draft regulator 205；
Draft regulator 205, is sealed container 105 by one and air inlet pipe 106 forms, and the other end of airway 204 passes through
Sealing in the gas regulation hole 104 access sealing container 105 that container 105 side wall upper part is offered, air inlet pipe 106 is the straight-through of hollow
Pipeline, is inserted in sealing container 105 by sealing container 105 top, is equipped with water, air inlet pipe 106 end in sealing container 105
Portion is the negative pressure water-head threshold value pre-set to the water-head of water liquid level in sealing container, the pressure in airway and negative pressure water
Threshold value pressure sum corresponding to potential difference threshold value is equal to atmospheric pressure.
In this utility model embodiment, as an alternative embodiment, seal the water liquid level in container 105 less than gas regulation
Hole 104, negative pressure water-head threshold value is set to h.As an alternative embodiment, Negative pressure irrigation liquid-penetrating device is placed in crops root soil
Region.
In this utility model embodiment, when system stability works, as an alternative embodiment, the sky in airway 204
The position that the gas port 103 that gas is filled to offer with reservoir 203 lower sidewall is connected.
The connectivity part of reservoir and airway, the side of corresponding airway is air, corresponding reservoir side for water, i.e.
In the connectivity part of reservoir Yu airway, there is liquid-gas interface.
In this utility model embodiment, aqueduct respectively with Negative pressure irrigation liquid-penetrating device and the place that is connected of reservoir,
Airway respectively with reservoir and seal container the place that is connected, the water inlet of reservoir and air inlet pipe be inserted into sealing
At container, sealing ring is all utilized to seal.
In this utility model embodiment, soil water potential is a kind of natural quality that soil has, i.e. natural in the overwhelming majority
In the case of, the soil nutrient mobile dependence soil moisture in soil is as medium, and moisture is always from the local flow direction that potential energy is high
The place that potential energy is low.Thus, can moisture flow to crops root system, and crops can absorb moisture, depends entirely on
The flow of water between soil water potential and the crops flow of water is poor, by irrigating, can promote soil water potential, if by providing to soil
The soil water potential of the constant correspondence of different soils moisture content, it is possible to achieve be precisely controlled different soil moisture contents, meets crop not
With the needs of growthdevelopmental stage, and in a certain period, thereby may be ensured that crops are grown in stable Soil Moisture always
Under.
The follow-up described negative pressure of it should be noted that this utility model embodiment, is for atmospheric pressure, i.e. described
Pressure in system and the relative value of atmospheric pressure, owing to native system delivery head is less than atmospheric pressure, thus also referred to as bear
Pressure is irrigated.
In this utility model embodiment, as an alternative embodiment, Negative pressure irrigation liquid-penetrating device is a permeable air-locked pottery
Soil pipe.
In this utility model embodiment, as an alternative embodiment, vitrified-clay pipe internal diameter 11mm, external diameter 18mm, long 250mm.
In this utility model embodiment, vitrified-clay pipe is fine and close many hollow structures, in certain pressure, has airtight,
But moisture can rely on flow of water difference to ooze out into the characteristic of outside soil.Specifically, when utilizing water supply negative pressure water supply, vitrified-clay pipe
Space in be full of moisture, and with the flow of water of the outer wall of vitrified-clay pipe (vitrified-clay pipe and soil contact position) less than or equal in vitrified-clay pipe
The flow of water (water supply negative pressure), so, during system water supply, the water in reservoir can only flow to soil, or, keep dynamically
Balance does not flows out so that water can be full of vitrified-clay pipe space always, thus significantly limit air and enter vitrified-clay pipe so that potter's clay
Pipe has airtight, but the characteristic of infiltration.
In this utility model embodiment, vitrified-clay pipe is according to crops Root Distribution and needs regimen condition to place into the soil a depthkeeping
Degree, such as, if crops are Fructus Cucumidis sativi, the suitable buried depth of vitrified-clay pipe is 15-25cm (distance earth's surface).
In this utility model embodiment, in order to be conducive to the air bubble produced in irrigating to discharge vitrified-clay pipe to enter liquid storage
Device, arranging tilted-putted vitrified-clay pipe and soil water plane is the angle of 1-5 °, and the vitrified-clay pipe one end being connected with aqueduct
Higher than the other end, the distance on distance earth's surface, the vitrified-clay pipe one end being i.e. connected with aqueduct less than other end distance earth's surface away from
From.
In this utility model embodiment, as an alternative embodiment, during in order to prevent negative pressure regulation system from bringing into operation,
In the case of water filled by reservoir, the water in reservoir may enter draft regulator along airway (CE pipe), thus impact is negative
The degree of regulation of pressure actuator, in this utility model embodiment, the E position arranging airway (is connected with sealing container
Position) height higher than the height of reservoir, the i.e. position in gas regulation hole higher than the water liquid level in reservoir.It is preferred that
The position in gas regulation hole is higher than the water inlet of reservoir.
In this utility model embodiment, the moisture storage capacity in reservoir can need regimen condition according to crops in each stage, fills
Enter the water yield needed for this stage.
In this utility model embodiment, as another alternative embodiment, pouring into water in draft regulator, water level is less than leading
When E (gas regulation hole) position that trachea is connected with draft regulator, in order to prevent day and night temperature from negative pressure being adjusted
The joint pressure that controlled of device produces impact, improves control crystal's degree of Negative pressure irrigation, and arrange in draft regulator is most without hydrospace
Measuring little, i.e. arrange draft regulator middle water level and try one's best close to E position, the water liquid level namely sealed in container is slightly less than inducing QI
Manage and seal the E position lower edge (gas regulation hole) that container is connected.
In this utility model embodiment, as an alternative embodiment, reservoir is hydrostatic column with sealing container.
It is preferred that this negative pressure regulation system still further comprises the water-level gauge 206 being provided with instruction water content consumption scale, water
Position meter 206 is external in reservoir, and liquid storage is accessed in the first water level hole that one end of water-level gauge 206 is offered by reservoir side wall upper part
In device, the first water level hole that the other end of water-level gauge 206 is offered by reservoir lower sidewall is accessed in reservoir.Wherein,
One water level hole is parallel or is higher than delivery hole.
In this utility model embodiment, as an alternative embodiment, water level is calculated as that [shape is used for measuring water level in reservoir
Change, and obtain water consumption according to the change of the floor space of reservoir and water level, illustrate with scale.As another optional reality
Executing example, water level is calculated as transparent scale pipe.
As an alternative embodiment, the aperture of aqueduct is more than 5cm.
In this utility model embodiment, air inlet pipe communicates with extraneous air.As an alternative embodiment, air inlet pipe is from bottom
Up it is provided with altitude scale.
In this utility model embodiment, in sealing container, the gas pressure intensity in water ullage space is less than or equal to air
Pressure.It is inserted into by change air inlet pipe and seals the subsurface height of water in container, can control to seal water ullage in container
Gas pressure intensity (air pressure) in space, and then by the system soil water in the range of soil water supply can control certain soil
Gesture so that soil water potential is consistent with the system water supply head set by air inlet pipe, and soil water potential is relevant to soil moisture content, because of
And, by soil water potential maintains a certain value, i.e. can realize soil moisture is precisely controlled by the height of regulation h,
And then provide the suitableeest soil moisture content at the growthdevelopmental stage that crop is different.It is strong that soil water potential bears hydraulic pressure for the water supply that system provides
(delivery head), size is equal to the hydraulic pressure in aqueduct, and the hydraulic pressure in aqueduct is equal to the gas pressure intensity in airway, i.e. exists
In the negative pressure regulation system sealed, the CE segment pipe at airway place is full of air, thus, Negative pressure irrigation liquid-penetrating device inner chamber
In location A at, at the B location of aqueduct, the most equal with the pressure of E position at the location of C of airway, the E position of airway
The pressure (it is strong that hydraulic pressure is born in water supply) putting place is isolated at liquid level to the water-head generation of water liquid level in sealing container with air inlet pipe air water
Pressure and value for atmospheric pressure.Thus, it is inserted into by control air inlet pipe and seals the subsurface height of water in container, can control
System supplies water and bears hydraulic pressure by force, makes soil moisture content surely hold at different content.
Below the work process of this utility model embodiment negative pressure regulation system is illustrated:
After installing the negative pressure regulation system of this utility model embodiment, Fig. 3 is that this utility model embodiment negative pressure is adjusted
The original state schematic diagram of joint system.Seeing Fig. 3, reservoir fills water by water inlet, by inlet seal, seals in container
It is filled with the water yield of (gas regulation hole) position that is connected with sealing container close to airway, air inlet pipe is inserted and seals container
In, air inlet pipe bottom is the first height with the distance of water liquid level in sealing container, in the water liquid level in air inlet pipe and sealing container
Water liquid level is concordant, and the atmospheric pressure in airway is atmospheric pressure, the air underfill in airway to reservoir lower sidewall
The position that the gas port offered is connected；
When negative pressure regulation system initial launch, the atmospheric pressure in airway is atmospheric pressure, the pressure of aqueduct outlet
Strong is also atmospheric pressure, higher than soil water potential, drives the water in reservoir to penetrate into soil by aqueduct and Negative pressure irrigation liquid-penetrating device
, there is space, thus drives and seal vessel water ullage space in earth so that the water level decreasing in reservoir above reservoir
Air enters reservoir superjacent air space by airway, and the water level in airway is to the gas port offered with reservoir lower sidewall
The position being connected is close；
Fig. 4 is that this utility model embodiment negative pressure regulation system is at the postrun schematic diagram of original state.See Fig. 4,
After the air of sealing vessel level superjacent air space enters reservoir superjacent air space by airway, airway internal gas pressure declines, and enters
Endotracheal air drives the water liquid level in air inlet pipe to decline, to produce water-head with liquid level in sealing container so that airway
The pressure sum that internal gas pressure and water-head produce is equal to atmospheric pressure, along with in reservoir, water oozes via aqueduct and Negative pressure irrigation
Liquid device enters in crops root soil, and soil moisture content gradually rises, and corresponding soil water potential gradually rises, gas in airway
Pressure is gradually reduced；
Airway internal gas pressure declines, but remains above soil water potential so that the water level in reservoir continues to decline, and persistently drives
The air sealing vessel level superjacent air space enters reservoir superjacent air space by airway, and then makes the air in airway
The position that the gas port being filled to offer with reservoir lower sidewall is connected, in the air in air inlet pipe drives air inlet pipe
Water liquid level continues to decline, until water liquid level drops to air inlet pipe bottom in air inlet pipe, in air inlet pipe water liquid level with seal in container
When the water-head that water liquid level produces reaches the first height, the pressure that draft regulator seals in upper vessel portion space becomes constant
Value, the most now the delivery head of system is steady state value, owing to the soil moisture content of system water supply crops root soil increases, when
When increasing to certain value, the soil water potential corresponding with this soil moisture content is consistent with system water supply head, then reach dynamic equilibrium,
Reservoir stops to soil water supply, and negative pressure regulation system enters steady operational status, as shown in Figure 2；
During the stable operation of negative pressure regulation system, due to evaporation or the transpiration of crops, again cause root system week
Enclose soil moisture content to reduce, during less than system water supply negative pressure, produce the flow of water poor, drive reservoir to cause to soil water supply, water supply
Water level decreasing in reservoir, system water supply negative pressure declines, and in airway, atmospheric pressure is more than system water supply negative pressure, thus drives
The air sealed in container enters reservoir superjacent air space along airway, with maintain in reservoir at B location with location of C at pressure
Strong balance, thus complete a cyclic process.So, system water supply negative pressure, when changing at the beginning, just can drive air inlet pipe
From outside suction air to sealing container, thus maintain system water supply negative pressure constant, it is possible to ensure that crops are grown in always
Under the conditions of stable soil moisture (constant soil moisture content), it is achieved do the crop continuous, automatic, the stability contorting to water.
In this utility model embodiment, due to the soil that the air pressure in airway is always corresponding more than or equal to soil moisture content
The flow of water so that air can only enter reservoir superjacent air space from airway, i.e. reservoir superjacent air space is constantly in from airway
The state of air-breathing.
In this utility model embodiment, system can be according to the law of needing the water of crops different phase, by regulation negative pressure
The water level extent of air inlet pipe bottom position and the water liquid level position sealed in container in actuator, such that it is able to provide suitable
Output.
In this utility model embodiment, if system is not when irrigating, air inlet pipe has the water of certain water level, enters
In water pipe, water level is contour with water level in sealing container, when supplying water, owing in airway, atmospheric pressure reduces, for maintaining airway
The pressure that middle atmospheric pressure and difference in height produce, equal to atmospheric pressure, needs to increase difference in height so that in airway atmospheric pressure with
The pressure sum of water-head is equal to atmospheric pressure, owing to water inlet pipe caliber is less, seals container caliber big so that have in air inlet pipe
The water of water level is quickly drained, and is drained into the water sealed in container and can ignore the water level impact sealed in container, thus
The atmospheric pressure in airway is quickly made to form constant voltage.
In this utility model embodiment, as an alternative embodiment, if the soil moisture content of crop culture is the lowest, shape
Time needed for becoming pressure constant state is the shortest, thus realizes during irrigating, and the atmospheric pressure in airway can self adaptation
Regulation, it is not necessary to the atmospheric pressure in airway is carried out manually or mechanically formula regulation.
Thus, this utility model embodiment has the advantage that
(1), energy-conservation；
This utility model embodiment is pressurizeed power set without the external world, by utilizing crop moisture physiological property and soil
Earth tensile property, it is achieved crops are continuous to moisture, obtain automatically, and ensure that the hydraulic pressure supplied water to crops remains constant,
Make crop growth under stable Soil Moisture.
(2), it is adaptable to different crops and the irrigation of crops different growing stage；
This utility model embodiment can be irrigated according to the water requirement of crops different times, for crops in difference
The situation that the soil appropriate aqueous amount of growth period is different, by change air inlet pipe with seal container in the difference in height of liquid level, can
To adjust system water supply negative pressure, crops are carried out at different growing stage the water supply of timely and appropriate discovery.
(3), it is to avoid clogging during irrigation.
In this utility model embodiment, Negative pressure irrigation liquid-penetrating device uses permeable air-locked vitrified-clay pipe, can significantly improve
The soil particle blockage problem to douche.
The foregoing is only preferred embodiment of the present utility model, be not intended to limit protection model of the present utility model
Enclose.All within spirit of the present utility model and principle, that made any amendment, equivalent and improvement etc., all should comprise
Within protection domain of the present utility model.
Claims (10)
1. a negative pressure regulation system, it is characterised in that this negative pressure regulation system includes: Negative pressure irrigation liquid-penetrating device, aqueduct, storage
Liquid device, airway and draft regulator, wherein,
One end of aqueduct is linked in Negative pressure irrigation liquid-penetrating device, and the delivery hole that the other end is offered by reservoir lower sidewall connects
Enter to reservoir；
Negative pressure irrigation liquid-penetrating device slant setting, the distance on distance earth's surface, the one end being connected with aqueduct is less than other end distance ground
The distance of table；
Reservoir is equipped with water；
One end of airway accesses in reservoir by the gas port that reservoir lower sidewall is offered, gas port and delivery hole position
In same level position, the other end of airway accesses negative pressure by the gas regulation hole that draft regulator side wall upper part is offered and adjusts
In joint device；
Draft regulator, is sealed container by one and air inlet pipe forms, and the other end of airway is by sealing container side wall top
The gas regulation hole offered is accessed and is sealed in container, and air inlet pipe is the direct piping of hollow, is inserted into by sealing container top
In sealing container, seal container contents and be equipped with water, to the water-head of water liquid level in sealing container for pre-setting bottom air inlet pipe
Negative pressure water-head threshold value, the threshold value pressure sum corresponding with negative pressure water-head threshold value of the pressure in airway is equal to atmospheric pressure.
2. negative pressure regulation system as claimed in claim 1, it is characterised in that described Negative pressure irrigation liquid-penetrating device is placed in crops
Root soil region.
3. negative pressure regulation system as claimed in claim 1, it is characterised in that aqueduct respectively with Negative pressure irrigation liquid-penetrating device with
And reservoir be connected place, airway respectively with reservoir and the water inlet of be connected place, reservoir that seals container
And air inlet pipe is inserted at sealing container, sealing ring is all utilized to seal.
4. negative pressure regulation system as claimed in claim 1, it is characterised in that described Negative pressure irrigation liquid-penetrating device is permeable impermeable
The vitrified-clay pipe of gas.
5. negative pressure regulation system as claimed in claim 4, it is characterised in that described tilted-putted Negative pressure irrigation liquid-penetrating device with
Soil water plane is the angle of 1-5 °, and be connected with aqueduct vitrified-clay pipe one end distance earth's surface distance less than the other end away from
Distance from earth's surface.
6. negative pressure regulation system as claimed in claim 1, it is characterised in that the water liquid level in described sealing container is less than gas
Adjustment hole.
7. negative pressure regulation system as claimed in claim 1, it is characterised in that described reservoir is cylinder with sealing container
Container.
8. negative pressure regulation system as claimed in claim 1, it is characterised in that farther include to be provided with instruction water content consumption and carve
The water-level gauge of degree, water-level gauge is external in reservoir, the first water level hole that one end of water-level gauge is offered by reservoir side wall upper part
In access reservoir, the other end of water-level gauge accesses in reservoir by the first water level hole that reservoir lower sidewall is offered, its
In, the first water level hole is parallel or is higher than delivery hole.
9. negative pressure regulation system as claimed in claim 1, it is characterised in that described water level is calculated as [shape.
10. negative pressure regulation system as claimed in claim 1, it is characterised in that described air inlet pipe is up provided with height from bottom
Degree scale.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620452654.2U CN205658126U (en) | 2016-05-18 | 2016-05-18 | Negative pressure governing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620452654.2U CN205658126U (en) | 2016-05-18 | 2016-05-18 | Negative pressure governing system |
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| CN205658126U true CN205658126U (en) | 2016-10-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108353762A (en) * | 2018-03-13 | 2018-08-03 | 中国农业科学院农业资源与农业区划研究所 | A kind of device for the control irrigation taps that absorbed water using soil negative pressure |
| CN108450111A (en) * | 2018-04-09 | 2018-08-28 | 湖南农业大学 | The water-fertilizer integral Negative pressure irrigation method of overwintering cauliflower |
-
2016
- 2016-05-18 CN CN201620452654.2U patent/CN205658126U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108353762A (en) * | 2018-03-13 | 2018-08-03 | 中国农业科学院农业资源与农业区划研究所 | A kind of device for the control irrigation taps that absorbed water using soil negative pressure |
| CN108450111A (en) * | 2018-04-09 | 2018-08-28 | 湖南农业大学 | The water-fertilizer integral Negative pressure irrigation method of overwintering cauliflower |
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