CN114303504B - Drainage gathering device and saline-alkali soil improvement method - Google Patents

Abstract

The present invention relates to the technical field of saline-alkali land improvement, in particular to a poly-drainage device and a method for improving saline-alkali land. Located in the outer tube, the inner tube and the outer tube are in close contact and are in a sliding connection; a concave surface, a part of the outer tube passes through the bottom of the concave surface, and the part of the outer tube located in the concave surface has a drainage hole. The saline-alkali land improvement method adopts the above-mentioned poly-drainage device, which also includes the steps of soaking and draining water for many times. The present invention is ingenious in design and novel in structure, and solves the problem of saline-alkali land improvement in the arid and water-scarce environment of the northwest region, and has very significant advantages. Promote the meaning of application.

Description

A poly drainage device and a method for improving saline-alkali land

technical field

The invention relates to the technical field of saline-alkali land improvement, in particular to a drainage device and a saline-alkali land improvement method.

Background technique

In the northwest of my country, there are many barren lands, and the soil in these places is mostly saline-alkali land. The surface color of saline-alkali soil is generally white, covered with a layer of alkali. This type of soil is extremely unsuitable for plant growth, especially crops.

Generally speaking, the sand pressing method is a common way to improve saline-alkali land in Northwest China. Farmers transport the yellow salad from the barren beach to the alkaline land that needs to be improved, cover the alkaline land, and add sand to greatly weaken the alkalinity of the soil. After years of planting and raising the land, the alkaline land gradually Alkalinity will be improved to a certain extent, and eventually it will become fertile land. However, this method has great geographical limitations and high cost input. First, there must be abundant yellow sand resources around the saline-alkali land, and second, the farmers who improve the land must have rich economic strength to support it. The short-term improvement effect of this method is not obvious, and it requires a long-term investment of a large amount of manpower and material resources, so this method is not suitable for large-scale promotion and application. There is drought and water shortage in Northwest China, making improvement difficult.

It is necessary to solve the above-mentioned technical problems.

Contents of the invention

In view of the above technical problems, the purpose of the present invention is to provide a drainage device and a method for improving saline-alkali land, which can effectively improve saline-alkali land, and has the characteristics of simple operation and large-area use. The technical scheme adopted by the present invention is as follows:

A poly drainage device, comprising:

an outer tube, the outer tube is a hollow tube and a plurality of drainage holes are arranged on the tube wall;

The inner tube is inserted into the outer tube, and the inner tube and the outer tube are in close contact and slidingly connected;

A concave surface, a part of the outer tube passes through the bottom of the concave surface, and a part of the outer tube located in the concave surface has drainage holes.

On the other hand, the present invention also provides a method for improving salinity,

Adopt a kind of poly drainage device as mentioned above, also comprise the following steps:

S1. Select the area to be improved and dig a planting pit, put the drainage device into the planting pit, and the concave surface is formed by an impermeable isolation layer arranged on the inner wall of the planting pit;

S2. Backfilling the excavated soil material in the planting pit in the concave surface;

S3. After moving the inner pipe to block the drainage hole, pour water into the concave surface and soak the earth material;

S4. Move the inner pipe until the drain hole is opened, and discharge the water in the concave surface;

S5. Steps S3 and S4 are repeated until the earth material in the concave surface meets the production requirements.

In some embodiments, the planting pit is provided with a plurality of planting pits, and the plurality of planting pits are connected to form a planting groove, and the concave surface is formed by a water-impermeable isolation layer arranged on the inner wall of the planting groove.

In some embodiments, multiple sets of outer tubes and inner tubes are arranged in the concave surface.

In some embodiments, the isolation layer is made of a material with air permeability, or is an air-impermeable plastic cloth or scraper cloth.

In some embodiments, in the step S1, the outer tubes located inside the concave surface and outside the concave surface both have drainage holes.

In some embodiments, in step S2, after backfilling the soil material in the planting pit, the inner pipe

and / or

The outer tube protrudes beyond the top of the earth material.

In some embodiments, in step S3, the soil material is soaked for 12-48 hours.

In some embodiments, the planting pit is U-shaped or V-shaped.

In some embodiments, openings are preset on the isolation layer, and connecting pipes are arranged at the openings, the isolation layer is tightly connected to the outer wall of the connecting pipes, and the connecting pipes have The inner diameter of the outer tube.

Compared with prior art, the beneficial effect that the present invention has is:

1. A drainage device provided by the present invention is provided with an outer tube with drainage holes and an inner tube slidingly connected with the outer tube. Moving the inner tube can realize the accumulation and discharge of water in the concave surface. The structure is simple but very efficient .

2. The method for improving saline-alkali land provided by the present invention can select the area to be improved and dig a planting pit according to the needs, and use the poly drainage device to realize repeated cleaning of the saline-alkali land in the concave surface, and reduce the salinity to meet the production requirements. The method is ingenious and low in cost, and does not waste too much water resources, and is suitable for large-scale promotion in Northwest China.

3. In the saline-alkali land improvement method provided in the present invention, the isolation layer is impermeable, which can not only be used to form the concave surface of the poly-drainage device for water isolation, but also isolate the saline-alkali land in the adjacent area from the water that has been cleaned. The area is polluted and has a good technical effect.

4. The inner pipe and the outer pipe in the present invention can be set to have a certain length to ensure that in the step S2, after backfilling the soil material in the planting pit, the inner pipe and/or the outer pipe exceed the soil The top of the material meets the production needs in saline-alkali land, and the outer tube and inner tube can be removed conveniently, which is beneficial to the subsequent crop planting, greatly reduces the cost, and has significant economic benefits.

To sum up, the present invention has ingenious design and novel structure, which solves the problem of improving saline-alkali land in the arid and water-deficient environment of the northwest region, and has very significant significance for popularization and application.

Description of drawings

In the following, preferred embodiments will be described in a clear and understandable manner with reference to the accompanying drawings, and the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention will be further described.

Fig. 1 is a schematic structural view of the drainage device of the present invention;

Fig. 2 is a schematic diagram of the principle of step S3 in a saline-alkali land improvement method of the present invention;

Fig. 3 is a schematic diagram of the principle of step S4 in a saline-alkali land improvement method of the present invention;

Description of reference numerals: 100 is an outer pipe, 200 is an inner pipe, 300 is a drainage hole, and 400 is a concave surface.

Detailed ways

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other accompanying drawings based on these drawings and obtain other implementations.

In order to keep the drawings concise, each drawing only schematically shows the parts related to the invention, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown or only one of them is marked. Herein, "a" not only means "only one", but also means "more than one".

It should be further understood that the term "and/or" used in the description of the present application and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations .

In this article, it needs to be explained that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

Referring to Fig. 1, the present invention provides a poly drainage device, including an outer tube, an inner tube and a concave surface, wherein the outer tube is a hollow tube and a number of drainage holes are arranged on the tube wall, and both the outer tube and the inner tube can be metal tubes Or a plastic pipe, the inner pipe is inserted in the outer pipe, and the inner pipe and the outer pipe are close to each other and are in a sliding connection; moving the inner pipe can block or open the drainage hole provided on the outer pipe, and the concave surface is used for water storage , a part of the outer pipe passes through the bottom of the concave surface, and a part of the outer pipe located in the concave surface has drainage holes.

When in use, move the inner tube to the inner tube to block the drainage holes on the outer tube located in the concave surface, and the outer tube, inner tube and concave surface cooperate to form a closed water storage space, and the water can be injected into the concave surface for a long time When the water is stored in the concave surface and the water in the concave surface needs to be drained, the inner tube is moved to open the drainage hole in the concave surface of the outer tube, and the discharge can be realized quickly, which has very high efficiency.

On the other hand, with reference to Figures 1 to 3, the present invention also provides a method for improving saline-alkali land, using the aforementioned drainage device, and further comprising the following steps:

S1. Select the area to be improved and dig a planting pit, put the drainage device into the planting pit, and the concave surface is formed by an impermeable isolation layer arranged on the inner wall of the planting pit;

S2. Backfilling the excavated soil material in the planting pit in the concave surface;

S3. After moving the inner pipe to block the drainage hole, pour water into the concave surface and soak the earth material;

S4. Move the inner pipe until the drain hole is opened, and discharge the water in the concave surface;

S5. Steps S3 and S4 are repeated until the soil material in the concave surface meets the production requirements, and then the outer tube and the inner tube can be removed, or the outer tube and the inner tube can be left in the planting pit.

It is worth noting that in step S1, the selected area to be improved is determined according to the crop to be planted, generally 3-5m, and the planting pit is dug after the area to be improved is determined, and the height of the planting pit is determined according to the general height of the plant root , the excavated planting pit is concave, and an isolation layer is laid on the inner wall of the concave planting pit. The purpose of the isolation layer is impermeable to form a concave surface in the poly drainage device for subsequent water storage. Attached to the inner wall of the planting pit, preferably, in some embodiments, the isolation layer not only covers the inner wall of the planting pit, but also extends to the surface of the saline-alkali ground around the planting pit, so as to avoid the impact of the surrounding saline-alkali land on the subsequent land improvement effect.

In this step S2, it should be noted that when backfilling the soil material, it is necessary to reserve a moving space for the inner pipe and ensure that the inner pipe can be moved relative to the outer pipe later. The water in step S3 is fresh water or weakly acidic fresh water. After soaking, it can react with alkaline substances in the soil to produce salt and dissolve in water, which is convenient for subsequent discharge. In step S4, due to the drought and water shortage in the northwest region and the low groundwater level, the inner pipe is moved to the drain hole to open , the water in the concave surface can be completely discharged and has high efficiency. A saline-alkali land improvement method provided in the present invention is proposed based on the characteristics of saline-alkali land in Northwest China. It has good adaptability and is worth noting Yes, in areas with high water tables, the technical effectiveness of this method is reduced.

In some embodiments, the planting pits are provided with a plurality of planting pits that communicate with each other to form a planting groove. The pits are provided with a separate isolation layer, but as a preferred embodiment, the planting grooves formed by these planting pits are preferably completely covered with an isolation layer on the inner wall of the planting groove, and the isolation layer forms an integral concave surface, and then each Set up a set of outer pipes and inner pipes in the area to be improved and form a drainage device. The soil material in the planting tank can be washed and discharged as a whole, which can greatly improve the improvement efficiency and facilitate the later planting planning. In addition, it is worth noting that , In the concave surface in the planting pit, multiple sets of outer tubes and inner tubes can also be arranged to improve the efficiency of drainage. The principle is the same as that of the planting tank, and will not be repeated.

In some embodiments, the isolation layer is made of a material with air permeability, or an air-impermeable plastic cloth or a knife scraping cloth. The air-permeable material can be more conducive to satisfying the air needed by the crops to breathe, but the air-impermeable The material is also acceptable, and opening a slightly larger opening of the planting pit can also meet the breathing needs of the plants, but it should be noted that in the same area, the number of planted plants will be reduced.

In some embodiments, in step S1, both the outer tubes located inside and outside the concave surface have drainage holes, the drainage holes located inside the concave surface are used to lead out the waste water in the concave surface, and the drainage holes located outside the concave surface are used to improve the discharge efficiency , which have the same structure but have different effects, in these embodiments, the drainage efficiency of the concave surface will be significantly improved.

In some embodiments, after the soil material in the planting pit is backfilled in step S2, the inner pipe and/or the outer pipe exceed the top of the soil material. In these embodiments, the outer pipe can be embedded in the soil material , but the inner pipe must exceed the top of the soil material. Compared with the embodiment of reserving the movable space of the inner pipe, the inner pipe set in this way is more convenient to move. Preferably, the outer pipe is also set to exceed The top of the soil after backfilling is convenient for subsequent removal of the inner and outer pipes.

In some embodiments, the soaking time of the soil material in the step S3 is specifically set to be 12-48 hours, so as to fully clear the saline-alkali substances on the soil surface and maximize the use of water resources. In some embodiments, the The planting pit is U-shaped or V-shaped, and the bottom is relatively concentrated to facilitate the discharge of water flow. In addition, as a preference, openings can also be preset on the isolation layer, and connecting pipes are arranged at the openings. The isolation layer is tightly connected to the outer wall of the connecting pipe, and the connecting pipe has an inner diameter suitable for the outer pipe, which not only facilitates the outer pipe to form a structure passing through the isolation layer, but also the isolation layer and the connecting pipe are pre-connected , the connection is tighter, the service life is longer, and the improvement effect of the soil is better.

It should be noted that the above embodiments can be freely combined as required. The above are only preferred embodiments of the present invention, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can also be made without departing from the principle of the present invention, and these improvements and modifications should also be considered Be the protection scope of the present invention.

Claims (8)

1. A method for improving saline-alkali soil is characterized in that,

a drainage device is adopted, comprising:

the outer tube is a hollow tube, and a plurality of water draining holes are formed in the tube wall;

the inner tube is inserted into the outer tube, and the inner tube and the outer tube are tightly attached and in sliding connection;

a concave surface, a part of the outer tube passes through the bottom of the concave surface, and a drain hole is formed in the part of the outer tube positioned in the concave surface;

the method also comprises the following steps:

s1, selecting an area to be improved, digging a planting pit, and placing the drainage collecting device into the planting pit, wherein the concave surface is formed by an isolation layer with water-impermeable property, which is arranged on the inner wall of the planting pit;

s2, backfilling the soil dug out by the planting pit in the concave surface; after backfilling the soil material of the planting pit, the inner tube and/or the outer tube exceeds the top of the soil material;

s3, after the inner pipe is moved to plug the drain hole, pouring water into the concave surface and soaking soil materials;

s4, moving the inner pipe to the drain hole to be opened, and discharging water in the concave surface;

s5, repeating the steps S3 and S4 until the soil material in the concave surface meets the production requirement.

2. The method for improving saline-alkali soil according to claim 1, wherein,

the planting pits are provided with a plurality of planting grooves and are communicated with each other to form the planting pits, and the concave surface is formed by an isolation layer with water-impermeable property, wherein the isolation layer is arranged on the inner wall of the planting grooves.

3. The method for improving saline-alkali soil according to claim 1, wherein,

and a plurality of groups of outer pipes and inner pipes are arranged in the concave surface.

4. The method for improving saline-alkali soil according to claim 1, wherein,

the isolating layer is made of a material with air permeability, or is air-proof plastic cloth or knife scraping cloth.

5. The method for improving saline-alkali soil according to claim 1, wherein,

in the step S1, the outer pipes positioned inside and outside the concave surface are respectively provided with a drain hole.

6. The method for improving saline-alkali soil according to claim 1, wherein,

and S3, soaking the soil for 12-48 hours.

7. The method for improving saline-alkali soil according to claim 1, wherein,

the planting pit is U-shaped or V-shaped.

8. The method for improving a saline-alkali soil as claimed in any one of claims 1 to 7, wherein,

the isolating layer is provided with an opening in advance, a connecting pipe is arranged at the opening, the isolating layer is tightly connected to the outer wall of the connecting pipe, and the connecting pipe is provided with an inner diameter size which is adaptive to the outer pipe.

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