CN104452655A - Laminated type evaporation-preventing water retention mulching film - Google Patents
Laminated type evaporation-preventing water retention mulching film Download PDFInfo
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- CN104452655A CN104452655A CN201410648840.9A CN201410648840A CN104452655A CN 104452655 A CN104452655 A CN 104452655A CN 201410648840 A CN201410648840 A CN 201410648840A CN 104452655 A CN104452655 A CN 104452655A
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- film
- water conservation
- thin film
- topmost thin
- overlay film
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
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- Laminated Bodies (AREA)
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Abstract
The invention discloses a laminated type evaporation-preventing water retention mulching film which covers the surface of a water area and comprises an upper layer of film body and a lower layer of film body, the film bodies are insoluble in water, the specific gravity is smaller than one, and the film bodies are provided with a large amount of through holes. The upper layer of film body and the lower layer of mulching film can locally move relatively, and the coefficient of thermal expansion of the upper layer of film body is larger than or equal to the coefficient of thermal expansion of the lower layer of film body. According to the laminated type evaporation-preventing water retention mulching film, the water of the water area of the mulched area can be evaporated only through the through holes in the film bodies; when it is dry and the temperature is high, the upper layer of film body is heated to expand to enable the film holes in the upper layer of film body to be reduced, and the evaporation amount is reduced; when it is rainy and the temperature is reduced, the film holes of the upper layer of film body and the lower layer of film body are expanded so that rainwater can smoothly flow into the water area through the film holes. The laminated type evaporation-preventing water retention mulching film is ingenious in structure, low in manufacturing cost and capable of effectively lowering the water evaporation amount, and the functions of water retention and dry prevention are achieved.
Description
Technical field
The present invention relates to the water conservation water saving field in waters, particularly one covers water surface, the stacked vaporization prevention water conservation overlay film preventing moisture from evaporating.
Background technology
Because dividing of weather hydrologic process is different, on the earth, the Precipitation and evaporation of each department is uneven.Simply, when evaporation exceedes precipitation, formed " arid area of lack of water ", otherwise form " humid region of Fu Shui ".The countries and regions of whole world drought and water shortage are numerous, and China also belongs to serious water shortage country.China's Arid&semi-arid area area is vast, accounts for 51% of territory total area.The general weather in drought-hit area is xeothermic, and water evaporation quantity is large.Research shows, at underlying surface, (underlying surface: underlying surface refers to and the earth surface that air lower floor directly contacts China's Loess Plateau natural rainfall.Atmospheric thermodynamics is its lower bound with surface, the land and water of the earth, is called atmospheric underlying surface) distribution be: 20% ~ 25% formed primary productivity, 10% ~ 15% formed soil erosion, 60% ~ 70% is invalid evaporation.Water becomes steam state by liquid or Solid State Transformation, and the process escaped in air is called evaporation.And evaporation capacity refers within certain period, moisture spreads to aerial amount through evaporation.General area is larger, temperature is higher, humidity is less, wind speed is larger, air pressure is lower, then evaporation capacity is larger; Otherwise evaporation capacity is less.
Many north, China's distribution of water resources south is few, and Dong Duoxi is few, for strengthening the allotment of water resource, improving water utilization rate, building project of South-to-North water diversion.But after this project comes into operation, huge water resource loss can be caused because of evaporation completely in the allotment distance of water.Center line general main canal length 1276 km, except passing through the minority tunnels such as the Yellow River, substantially be all open channel, for center line, assumed average water surface width is 20 meters, then water surface area about 25520000 square metres, according to south water to north circuit temperature on average situation over the years, annual summer (120 days) mean daily temperature is at 30 DEG C, get parameter shown in accompanying drawing 1a, then the water evaporation quantity of every square metre of water surface area is 0.00115t/h, all the other daily mean temperatures are by 15 DEG C, get parameter shown in accompanying drawing 1b, then the water evaporation quantity of every square metre of water surface area is 0.00069t/h, then annual water evaporation quantity T=(0.00115*24*120+0.00069*24*245) * 25520000 ≈ 1.9 hundred million tons.National, global rivers and canals, pool, reservoir are countless.If the water resource loss avoiding this huge, consequent economic benefit, social benefit will be limitless.
Therefore, how to take necessary measure to store precipitation, prevent moisture from evaporating, will production, the life of people be related to, directly affect the national economy of arid countries and regions.
Summary of the invention
The object of the present invention is to provide the water conservation overlay film of a kind of effective reduction waters evaporation capacity, for realizing this object, the present invention by the following technical solutions:
A kind of stacked vaporization prevention water conservation overlay film, described water conservation overlay film is covered in water surface, and it comprises upper and lower double-layer films, and described upper and lower double-layer films is all water insoluble, proportion is less than 1, and is equipped with a large amount of through hole; Upper and lower double-layer films local can be movable relatively, and the coefficient of thermal expansion of topmost thin film is more than or equal to the coefficient of thermal expansion of lower film.
Further, overlap-like state between the through hole of described topmost thin film and the through hole of lower film.
Further, connecting line is formed between described topmost thin film and lower film, or pressing has grid between described topmost thin film and lower film, whole water conservation overlay film is divided into some regions by described connecting line or grid, and the topmost thin film in each region and lower film can be movable relatively.
Further, described lower film is provided with a large amount of projection in via clearance, described topmost thin film is superimposed or be bonded in convex surfaces, make to form space between topmost thin film and lower film, the center line of topmost thin film through hole and the misalignment of lower film are arranged, increase passage and the resistance of steam, thus reduce evaporation capacity further.
Further, described projection is hemisphere shape or polyhedral.
Further, the pressing of described water conservation overlay film periphery has connector, and multiple water conservation overlay films are joined together by connector each other.Water conservation overlay film and waters periphery, can fix with soft rope or hard moulding.
Further, described upper and lower layer film all adopts high molecular plastics and rubber or is compounded with the high molecular plastics and rubber of reinforcing rib fiber or the above two is material modified, makes through foaming or do not foam.
Further, described high molecular plastics and rubber material be selected from PE, PP, PS, PC, PA, PU, PET, PVC, ABS, EVA, PMMA, nylon, nitrile rubber, butadiene-styrene rubber one or more.
The present invention compared with prior art, has the following advantages:
The present invention opens coefficient difference by thermal expansion and is provided with the cooperation between the upper and lower double-layer films of a large amount of through hole, and make when more easily there is the higher temperature of moisture evaporation, the through hole of topmost thin film diminishes, and reduces waters evaporating surface; And when rainy day, temperature was lower, the through hole of topmost thin film becomes large, improve rainwater and enter waters by through hole, and then reach the object of water water conservation.Bilayer film can strengthen tensile strength simultaneously, improves application life.Structure of the present invention is ingenious, and manufacture craft is convenient, and cost of production economy, have a good application prospect.
Accompanying drawing explanation
Fig. 1 a is summer (30 DEG C) surface water evaporation capacity computational chart.
Fig. 1 b is spring and autumn (15 DEG C) surface water evaporation capacity computational chart.
Fig. 2 a is stacked vaporization prevention water conservation structure of film schematic diagram in the embodiment of the present invention.
Fig. 2 b is the generalized section of vaporization prevention water conservation overlay film stacked described in Fig. 2 a.
Fig. 3 is the waters generalized section of Moisture conservation overlay film in the embodiment of the present invention.
Fig. 4 is the enlarged diagram at A place in Fig. 3.
Fig. 5 is the top view of the embodiment of the present invention.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.
A kind of stacked vaporization prevention water conservation overlay film, described water conservation overlay film is covered in the water surface of Middle Line Project For Transferring Water From South To North open channel, and it comprises upper and lower double-layer films, and described film is all water insoluble, proportion is less than 1, and is equipped with a large amount of through hole; Upper and lower double-layer films local can be movable relatively, and the coefficient of thermal expansion of topmost thin film is more than or equal to the coefficient of thermal expansion of lower film.Described lower film adopts modified foaming rubber-plastics material to make, the coefficient of thermal expansion of this lower film is little, and there is heat insulation effect, film lower floor is made to keep low temperature and the low temperature in topmost thin film isolated water can be made, topmost thin film can better reduce its fenestra aperture when heat and drought condition expands, reduce the evaporation capacity of moisture.
Wherein, the through hole that lower films is arranged is manhole, can certainly be other shapes, as square, polygon etc., but circular through hole.Due to time rainy, the particle water particle diameter of heavy rain is 1x10^4 microns, and moderate rain particle water particle diameter is when raining heavyly 2x10^3 to 3x10^3 micron, and the molecular diameter of steam is 4x10^-4 micron.The aperture of described through hole is not less than 1x10^4 micron, and topmost thin film is not less than 4x10^-4 micron in fenestra aperture when expanding, and to ensure that rainwater flows into this waters, in turn ensure that gas exchanges during high temperature.The described through hole gross area accounts for 10% to 30% of whole overlay film area.
Wherein, overlap-like state between the through hole of described topmost thin film and the through hole of lower film.So-called overlapping state, namely, when water conservation overlay film is laid in water surface, depression angle can see that the through hole of topmost thin film and the through hole center line of lower film present dislocation, and upper and lower layer through hole presents partly overlapping situation.After this design can make topmost thin film expand, its through hole and lower film can form dislocation, and the overlapping area of the through hole of topmost thin film and the through hole of lower film reduces, and namely reduces disengagement area.
Wherein, described lower film is provided with a large amount of projection in via clearance, described topmost thin film is superimposed or be bonded in convex surfaces, make to form space between topmost thin film and lower film, the through hole of topmost thin film and the film of lower floor shift to install, when moisture is upwards evaporated from the through hole of lower film, cannot directly vertically run out of from lower film through hole and upper strata through hole, but need first to be evaporated to the space between levels film from lower film through hole, run out of from the through hole of topmost thin film again, extend evaporation approach, thus slow down moisture evaporation.
Wherein, in order to ensure the stacked globality of vaporization prevention water conservation overlay film and the relative motion between topmost thin film and lower film, the present invention is formed with connecting line between described topmost thin film and lower film, whole water conservation overlay film is divided into some regions by described connecting line, and the topmost thin film in each region and lower film can be movable relatively.The position of described connecting line is the connecting portion of topmost thin film and lower film, is can obtain connection by hot pressing topmost thin film and lower film in process of production.Another kind of mode is, then that pressing forms grid between described topmost thin film and lower film, described grid material comprises the fine rules such as lightweight aluminium wire, carbon fiber, basalt fibre, described grid and described connecting line have equal effectiveness, whole water conservation overlay film can be divided into some regions, the topmost thin film in each region and lower film can be movable relatively.
Wherein, as shown in Figure 2 a and 2 b, described lower film 10 is provided with a large amount of protruding 11 in through hole 12 gap, and described topmost thin film 20 is superimposed on protruding 11 surfaces, makes to form space between topmost thin film 20 and lower film 10.Described protruding 11 is hemispherical, and inside stuffing is gas, during making, blow molding process only need be adopted to get final product this structure of convenient acquisition.Certainly, this projection also can be other such as polyhedron-shaped structures, as long as can play a supporting role, makes to form space between levels film.For topmost thin film 20, its through hole 21 is preferably funnel-form through hole, is convenient to assemble rainwater, and is conducive to reducing bottom surface moisture evaporation.
Wherein, conveniently fix water conservation overlay film, and the connection between multiple water conservation overlay films, the pressing of described water conservation overlay film periphery has lap nylon buckles (namely described connector), and multiple water conservation overlay films are interlocked by lap nylon buckles each other and join together.This lap nylon buckles by the fixture at edge, fastening waters (such as spud pile, fixing iron wire ring etc.), can also form the fixing of whole water conservation overlay film.When clearing up waters or other need remove overlay film, nylon buckles being untied, facilitating overlay film to lay and removing.
Above-mentioned water conservation overlay film, its levels film all adopt in PE, PP, PS, PC, PA, PU, PET, PVC, ABS, EVA, PMMA, nitrile rubber, butadiene-styrene rubber and nylon material one or more, or these Material claddings have the fibroplastic material of reinforcing rib, or the material that the former two is formed through modification, makes by foaming or not foaming.Certainly also can choice for use with the close material of these high molecular plastics and rubber material propertys, here just do not enumerate.In selection, topmost thin film employing coefficient of thermal expansion is comparatively large, lower film then adopts coefficient of thermal expansion less and the material that heat-proof quality is good preparation.
Fig. 3 to Fig. 4 illustrates the schematic diagram covering water conservation overlay film of the present invention in waters.As shown in Figures 3 to 5, at waters 100 surface coverage water conservation overlay film of the present invention, this water conservation overlay film comprises topmost thin film 20, lower film 10.Topmost thin film 20 modification LDPE (low density polyethylene (LDPE)) film that water insoluble, proportion are 0.92, thickness is 0.5mm, coefficient of thermal expansion is large is made.The lower film 10 modification XPS expanded material that water insoluble, proportion are 0.3, thickness is 0.5mm, heat-proof quality is good is made.Topmost thin film 20 and lower film 10 are equipped with a large amount of through holes 21,12, and through hole 21 maximum diameter of hole of topmost thin film 2 is 0.5mm, and through hole 21 gross area accounts for 10% of the topmost thin film gross area, and through hole 12 aperture of lower film 10 is 1mm.The funnel-form that the through hole 21 one-tenth of described topmost thin film 20 is up big and down small, is convenient to assemble rainwater; The through hole 12 of lower film 10 is circular.Topmost thin film 20 and lower film 10 all adopt and form at the mode hasp of film edge pressing lap nylon buckles 30 (being described connector).In waters 100, periphery arranges fixing anchor ear, connecting rod (not shown in FIG.), and the link relative one by one with described overlay film periphery and/or hook and/or soft rope (not shown in FIG.) are mutually.
Described overlay film water-keeping device, by described water conservation overlay film in the surface coverage of whole waters 100, plays ventilated and evaporation by means of only through hole 21,12, greatly reduces disengagement area, reduces water evaporation quantity.During heat and drought condition, topmost thin film 20 temperature is high, prevent again with the lower film 10 that expanded material is formed and carry out heat transmission with low temperature in water and cause the temperature of topmost thin film 20 to reduce, under the effect of heat expansion, through hole 21 aperture of topmost thin film 20 can reduce, further reduction disengagement area, reduces evaporation capacity.Rain or air humidity is large time, the water on film top layer can flow in waters along numerous through hole, inject new former water resource to waters.
The waters that the present invention uses comprises paddy field, pond, reservoir, lake, rivers (in territory, obstructed navigating area) etc.Described water conservation overlay film can according to cultivation or other demands, and surface does not all cover described water conservation overlay film or covered above waters or in this compliance technically doing other every sky by described water conservation overlay film and reequips.
Stacked vaporization prevention water conservation overlay film of the present invention, coefficient difference is opened and cooperation between the upper and lower double-layer films being provided with a large amount of through hole by thermal expansion, make when more easily there is the higher temperature of moisture evaporation, the through hole of topmost thin film diminishes, and reduces waters evaporating surface; And when rainy day, temperature was lower, the through hole of topmost thin film becomes large, improve rainwater and enter waters by through hole, and then reach the object of water water conservation.Structure of the present invention is ingenious, and manufacture craft is convenient, and cost of production economy, have a good application prospect.
The above; be only the present invention's preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (9)
1. a stacked vaporization prevention water conservation overlay film, is characterized in that, described water conservation overlay film is covered in water surface, and it comprises upper and lower double-layer films, and described upper and lower double-layer films is all water insoluble, proportion is less than 1, and is equipped with a large amount of through hole; Upper and lower double-layer films local can be movable relatively, and the coefficient of thermal expansion of topmost thin film is more than or equal to the coefficient of thermal expansion of lower film.
2. stacked vaporization prevention water conservation overlay film according to claim 1, is characterized in that, overlap-like state between the through hole of described topmost thin film and the through hole of lower film.
3. stacked vaporization prevention water conservation overlay film according to claim 1, it is characterized in that, be formed with connecting line between described topmost thin film and lower film, whole water conservation overlay film is divided into some regions by described connecting line, and the topmost thin film in each region and lower film can be movable relatively.
4. stacked vaporization prevention water conservation overlay film according to claim 1, it is characterized in that, between described topmost thin film and lower film, pressing has grid, and whole water conservation overlay film is divided into some regions by described grid, and the topmost thin film in each region and lower film can be movable relatively.
5. stacked vaporization prevention water conservation overlay film according to claim 1, it is characterized in that, described lower film is provided with a large amount of projection in via clearance, described topmost thin film is superimposed or be bonded in convex surfaces, make to form space between topmost thin film and lower film, the center line of topmost thin film through hole and the misalignment of lower film are arranged.
6. stacked vaporization prevention water conservation overlay film according to claim 5, it is characterized in that, described projection is hemisphere shape or polyhedral.
7. stacked vaporization prevention water conservation overlay film according to claim 1, is characterized in that, described water conservation overlay film periphery is provided with connector, and multiple water conservation overlay films are joined together by connector each other; Water conservation overlay film and waters periphery, fix with soft rope or hard moulding.
8. the stacked vaporization prevention water conservation overlay film according to any one of claim 1 to 7, it is characterized in that, described upper and lower layer film all adopts high molecular plastics and rubber or is compounded with the high molecular plastics and rubber of reinforcing rib fiber or the above two is material modified, makes through foaming or do not foam.
9. stacked vaporization prevention water conservation overlay film according to claim 8, described high molecular plastics and rubber material be selected from PE, PP, PS, PC, PA, PU, PET, PVC, ABS, EVA, PMMA, nitrile rubber, butadiene-styrene rubber one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410648840.9A CN104452655B (en) | 2014-04-29 | 2014-11-14 | A kind of stacked vaporization prevention water conservation overlay film |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2014101766751 | 2014-04-29 | ||
| CN201410176675.1A CN103918513A (en) | 2014-04-29 | 2014-04-29 | Laminated covering film water retention device |
| CN201410648840.9A CN104452655B (en) | 2014-04-29 | 2014-11-14 | A kind of stacked vaporization prevention water conservation overlay film |
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| Publication Number | Publication Date |
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| CN104452655A true CN104452655A (en) | 2015-03-25 |
| CN104452655B CN104452655B (en) | 2016-04-27 |
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| CN201410176675.1A Pending CN103918513A (en) | 2014-04-29 | 2014-04-29 | Laminated covering film water retention device |
| CN201410648840.9A Active CN104452655B (en) | 2014-04-29 | 2014-11-14 | A kind of stacked vaporization prevention water conservation overlay film |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410176675.1A Pending CN103918513A (en) | 2014-04-29 | 2014-04-29 | Laminated covering film water retention device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105113451A (en) * | 2015-08-20 | 2015-12-02 | 罗丽秀 | Sunshade ball capable of improving water body sunblock effect |
| CN105113454A (en) * | 2015-08-20 | 2015-12-02 | 罗丽秀 | Water body sunshade ball capable of reducing production cost |
| CN107542062A (en) * | 2017-08-21 | 2018-01-05 | 安徽省康宇水电机械成套设备有限公司 | A kind of revetment brick with water sun-screening function |
| CN109121911A (en) * | 2018-08-03 | 2019-01-04 | 肖正宇 | A kind of nursery stock liquid manure holding film |
| WO2020191855A1 (en) * | 2019-03-28 | 2020-10-01 | 江苏爱索新材料科技有限公司 | Covering device and construction method therefor |
| WO2021009536A1 (en) * | 2019-07-13 | 2021-01-21 | Navidnia Behzad | Intelligent plates embedded in natural and artificial lakes and rivers, to prevent evaporation of water |
| CN112960711A (en) * | 2021-04-04 | 2021-06-15 | 厦门三和超道智能科技有限公司 | Evaporation-proof water-retaining device |
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| CN107211775A (en) * | 2016-03-22 | 2017-09-29 | 冯忠良 | A kind of arid agricultural and forestry production diaphragm and technology |
| CN107211776A (en) * | 2016-03-22 | 2017-09-29 | 冯忠良 | A kind of arid agricultural and forestry production diaphragm |
| CN109511447A (en) * | 2018-11-16 | 2019-03-26 | 山东隆昌塑业有限公司 | A kind of porous telescopic type has the water-permeable membrane of sealing function |
| CN111520379B (en) * | 2020-05-13 | 2021-09-10 | 瑞安市宏泰包装有限公司 | Side edge overlapping and connecting machine of covering film and using method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105113451A (en) * | 2015-08-20 | 2015-12-02 | 罗丽秀 | Sunshade ball capable of improving water body sunblock effect |
| CN105113454A (en) * | 2015-08-20 | 2015-12-02 | 罗丽秀 | Water body sunshade ball capable of reducing production cost |
| CN107542062A (en) * | 2017-08-21 | 2018-01-05 | 安徽省康宇水电机械成套设备有限公司 | A kind of revetment brick with water sun-screening function |
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| WO2020191855A1 (en) * | 2019-03-28 | 2020-10-01 | 江苏爱索新材料科技有限公司 | Covering device and construction method therefor |
| WO2021009536A1 (en) * | 2019-07-13 | 2021-01-21 | Navidnia Behzad | Intelligent plates embedded in natural and artificial lakes and rivers, to prevent evaporation of water |
| CN112960711A (en) * | 2021-04-04 | 2021-06-15 | 厦门三和超道智能科技有限公司 | Evaporation-proof water-retaining device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104452655B (en) | 2016-04-27 |
| CN103918513A (en) | 2014-07-16 |
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