Summary of the invention
The purpose of this utility model is to provide a kind of physical features discrepancy in elevation of nature of utilizing to obtain the slight irrigation that water delivery pressure is supplied the physical features lower for the deficiency that solves above-mentioned technology, carry out gravity irrigation, improve the availability of water resource, the gravity flow of realization high yields irrespective of drought or water logging declines and holds irrigation system.
In order to achieve the above object, the designed gravity flow of the utility model declines and holds irrigation system, its main irrigator, valve, water-supply-pipe are formed, have corresponding collective area and preferably the eminence of vegetation water point is set, water point constitute by check dam and with filtering ponds UNICOM, filtering ponds are that the aqueduct of 3%-5% is connected to cistern by gradient, cistern is arranged on the hillside, and is that 5 meters to 20 meters irrigator is communicated with by water-supply-pipe with being arranged on lower drop height, be provided with valve at cistern and water-supply-pipe junction, irrigator is provided with plug.
In order to reach better filter effect, the filtering ponds volume is 2 cubic metres to 4 cubic metres, the pond body is divided into both sides by dividing plate, pass through duct, bottom UNICOM between the both sides, at pond body one upper lateral part UNICOM water point, opposite side sidewall middle and upper part is connected with aqueduct, and layering is provided with filtration with cobblestone or charcoal in the body of pond, quantity accounts for 1/3rd to 2/3rds of filtering ponds volume, and the place is provided with valve at the nearly filtering ponds of aqueduct.In order to use for a long time in the retaining pond, cistern pond body should be embedded in underground, the part of basseting is zero to 1/3rd for pond height degree, the pond body wall is grouted by the piece stone of 30 centimetres thickness at least, and 0.8 centimetre of three-decker of forming to the fine sand cement of 1.2 cm thicks of the concrete of at least 10 cm thicks and batch brush constitutes; The hard stone that body front portion, pond is provided with 2-3 rice protects the pond; On Chi Tiding, be provided with loam cake, can prevent that foreign matter from entering cistern and polluting irrigation water and stop up each bar water pipe; On the watering place sidewall, be provided with water intaking valve, feed water valve, wash pond valve and spillway hole, wash the pond valve and be connected with discharge outlet, when suitably being, can close water intaking valve and feed water valve, open and wash the pond valve, to clean cistern by drainpipe.
In order to prevent that the aqueduct explosion from causing situation such as leak and taking place, aqueduct is buried underground and underground 40 centimeters at least, and is provided with air bleeding valve in the aqueduct stage casing, to get rid of inner air tube, reduces resistance to water-flow; Described water-supply-pipe by the water main, be in charge of with the arm water-supply-pipe and form, the water main buries underground and underground 50 centimeters at least, and should avoid with the water main be embedded in the road, in the ditch, leak with anti-tamper, the arm water-supply-pipe that inserts the field is that 25 millimeters special-purpose black polyethylene plastic tube is formed by external diameter; Connect by filter between described irrigator and the water-supply-pipe, prevent the irrigation hole plug of some tiny impurity irrigator.At the bottom of the cistern pond and side wall shop can also be provided with tension reinforcement, further strengthens the intensity of cistern.
The resulting gravity flow of the utility model declines and holds irrigation system, utilize scenery with hills and waters and rainwater and natural drop as water source and power, set up the pond in the physical features eminence and accumulate scenery with hills and waters and rainwater, utilize the physical features discrepancy in elevation of nature to obtain the gravity flow slight irrigation that water delivery pressure is supplied the physical features lower.Some tiny water source accumulations that run off in vain at ordinary times of mountain area are got up, the effect of performance " the big usefulness of little water ", but become valuable irrigation water resource, particularly can bring into play very important irrigation effect during lack of water dry season in mountain region farming is produced.This gravity flow decline hold irrigation system in the mountain area, upper level applies, can make mountain area a large amount of " by a day field " become the high-yield field of high yields irrespective of drought or water logging, be equivalent to increase the capacity and the effect of mountain area cultivated land resource and water resource, become and help mountain development high-efficiency and economic crop, the effective technology of high yields irrespective of drought or water logging, increase wealth.
Embodiment
The utility model will be further described in conjunction with the accompanying drawings below by embodiment.
Embodiment 1
As Fig. 1, shown in Figure 2, the gravity flow that present embodiment is described declines and holds irrigation system, its main irrigator 1, valve 2, water-supply-pipe 3 is formed, have corresponding collective area and preferably the eminence of vegetation water point is set, water point constitute by check dam 4 and with filtering ponds 5 UNICOMs, filtering ponds 5 are that 5% aqueduct 6 is connected to cistern 7 by gradient, cistern 7 is arranged on the hillside, and is that 5 meters irrigator 1 is communicated with by water-supply-pipe 3 with being arranged on lower drop height, be provided with feed water valve 21 in cistern 7 and water-supply-pipe 3 junctions, on irrigator 1, plug is set, when not needing to irrigate, blocks irrigator 1 by plug.Connect by filter 9 between described irrigator 1 and the water-supply-pipe 3, prevent the irrigation hole plug of some tiny impurity irrigator 1.Filtering ponds 5 volumes are 2 cubic metres, pond body 51 is divided into both sides by dividing plate 52, pass through duct, bottom 53 UNICOMs between the both sides, at pond body 51 1 upper lateral part UNICOM water points, opposite side sidewall middle and upper part is connected with aqueduct 6, layerings are provided with filtration with filter mediums such as cobblestone or charcoal 54 in the pond body 51, and quantity accounts for 1/3rd of filtering ponds volume, and 5 places are provided with valve 2 at aqueduct 6 nearly filtering ponds.
When setting up water point, notice that water point than nonirrigated farmland height, have corresponding drop, more than the water point corresponding collective area will be arranged, vegetation preferably be arranged.As with the combination of villager's drinking water, the water source is without pollution.Will build up check dam 4 according to concrete landform, the water yield to water point, the gully water that dams blocks silt particle, makes the water at water source can introduce filtering ponds 5 as far as possible.When needs are safeguarded filtering ponds 5, can use valve 2 to close aqueduct 6 simultaneously.Embodiment 2
As shown in Figure 3, the described gravity flow of present embodiment declines and holds irrigation system, and its described aqueduct 6 forced landings are 3%, and the volume of filtering ponds 5 is 4 cubic metres, and the height fall between cistern 7 and the irrigator 1 is 20 meters.Layerings are provided with filtration with cobblestone or charcoal in the pond body 51, and quantity accounts for 2/3rds of filtering ponds volume.For cistern 7 can use for a long time, cistern 7 pond bodies should be embedded in underground, the part of basseting is 1/3rd of pond body 71 height, body 71 walls in pond are by the concrete seven 3 and batch three-decker formation of brushing fine sand cement 74 compositions of 0.8 cm thick of cemented rock 72,10 cm thicks of 30 centimetres thickness; Body 71 front portions in pond are provided with 2 meters hard stone and protect pond 75; On pond body 71 tops, be provided with loam cake 76, can prevent that foreign matter from entering cistern and polluting irrigation water and stop up each bar water pipe; On the watering place sidewall, be provided with water intaking valve 22, feed water valve 23, wash pond valve 24, wash pond valve 24 and be connected with discharge outlet, when suitably being, can close water intaking valve 22 and feed water valve 23, open and wash pond valve 24, to clean cistern 7 by drainpipe 77.Simultaneously also be provided with spillway hole 78, after irrigation water reaches a constant volume in the cistern 4, can overflow from spillway hole 78 automatically, cistern 4 is damaged to prevent excessive irrigation water in cistern 7 side wall upper part.
When building cistern 7, the size in pond is determined according to the need irrigated area.General by per 100 mu of vegetable plots rotation flow in per 5 days a time, irrigated 1 hour for every mu at every turn, irrigate the criterion calculation of 4.5 tons of water (quite 12mm rainfall), need join the cistern of a reservoir storage hundredweight.Pouring should be selected concrete for use No. 150, and the cement sand coarse aggregate ratio is 1:6, and sandstone cleans no mud, free from admixture, thickness reasonable mixture ratio; At the bottom of the pond and side wall preferably lay tension reinforcement 78; Cemented rock 72 should be selected hard stone for use, can not use weathered granite; Body front portion, pond should have the hard stone of 2-3 rice to protect pond 75, when the soil body approaches, need add the stone-laying pound and reinforce; The washing pond, draining and preferably can water be drained into puddle or ditch of cistern 7 with drainpipe 77 (the big bore of relative aperture aqueduct).
Embodiment 3
As Fig. 4, shown in Figure 5, the described gravity flow of present embodiment declines and holds irrigation system, and its described cistern 7 is all imbedded underground, the pond body wall is by the concrete seven 3 and batch three-decker formation of brushing fine sand cement 74 compositions of 1.2 cm thicks of cemented rock 72,50 cm thicks of 50 centimetres thickness; Body 71 front portions in pond are provided with 3 meters hard stone and protect pond 75.In order to prevent that aqueduct 6 explosions from causing situation such as leak and taking place, aqueduct 6 is buried underground and underground 40 centimeters at least, and is provided with air bleeding valve 8 in aqueduct 6 stage casings, to get rid of inner air tube, reduces resistance to water-flow; Described water-supply-pipe 3 by water main 31, be in charge of 32 and arm water-supply-pipe 33 form, the water main buries underground and underground 50 centimeters at least, and should avoid with the water main be embedded in the road, in the ditch, leak with anti-tamper, the arm water-supply-pipe that inserts the field is that 25 millimeters special-purpose black polyethylene plastic tube is formed by external diameter.
When aqueduct is set, the caliber size of aqueduct is decided according to water source flow size, the water requirement of area of being benefited and the discrepancy in elevation between water source and the cistern, rule of thumb measuring and calculating, the daily flow of the general aqueduct bore of gradient about 3-5% is: 1 writing brush is 50-100 side, 1.5 writing brush is 110-150 side, 2 writing brushes are 170-200 side.It is too many that water diversion surpasses water requirement, causes waste, and principle is to guarantee sufficient water diversion, economical rationality again.Diversion will have certain drop (gradient), and gradient is too little, and flow velocity is slow excessively, sometimes because of vapour lock produces cutout, generally selects the gradient of 3-5% for use.Gradient neither be the bigger the better, and gradient is big more, and pressure is also big, moulds tube wall and bears pressure certain limit is arranged, and causes tube wall to break easily and leaks, and shortens and moulds pipe and valve service life.When laying aqueduct, descend along the slope, it is too big to rise and fall as far as possible, moulds pipe and wants buried below 40 centimetres, meets rock exposure, be difficult to buried, also will raggle on rock, water envelope with mixed earth above, do not allow to mould to manage and expose, the joint of moulding pipe is closely air tight.