CN112814076A

CN112814076A - Water taking system

Info

Publication number: CN112814076A
Application number: CN202110186460.8A
Authority: CN
Inventors: 李丹凤; 王训明
Original assignee: Institute of Geographic Sciences and Natural Resources of CAS
Current assignee: Institute of Geographic Sciences and Natural Resources of CAS
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2021-05-18

Abstract

The application provides a water intaking system relates to and irrigates technical field. The water taking system comprises a control device and a water lifting device, the water lifting device is controlled by the control device to extract fresh water and salt water according to a preset water quantity proportion, the fresh water and the salt water can be respectively extracted by the water lifting device according to the preset water quantity proportion, then the fresh water and the salt water are mixed and then are conveyed to a water supply pipeline, the mixing of the fresh water and the salt water can be completed through the water lifting device, the water taking system can be realized by only drilling a well, a ground stirring mixing pool is not required to be arranged, and the investment cost of the irrigation system is greatly reduced.

Description

Water taking system

Technical Field

The application relates to the technical field of irrigation, in particular to a water taking system.

Background

The development and utilization of shallow salt water resources for irrigation in the areas with extremely deficient surface water resources become an important measure for solving the water resource crisis in the areas. For most crops, when the saline water with the concentration of more than 3g/L is used for irrigation, the growth of the crops is easily inhibited, the soil environment is easily subjected to salt alkalization, and the sustainable development of agriculture and ecology is not facilitated. Therefore, the method is widely applied to irrigation by mixing shallow underground salt water and deep fresh water and configuring the brackish water below tolerance threshold values of irrigated crops and vegetation, and the technology can provide technical support for reducing regional underground water exploitation and realizing regional water resource balance.

Usually, the saltwater reservoir is distributed at the surface and the freshwater reservoir is distributed at the deep. In order to mix the salt water and the fresh water, a salt water well and a fresh water well are generally drilled in a relatively close area, and facilities such as a water pump are disposed in the two wells. Fresh water and salt water are respectively pumped out from the water storage layer and collected into the stirring and mixing tank, so that the salt water and the fresh water are mixed, after the salt content or the conductivity of the mixed water is determined, whether the prepared brackish water meets the irrigation requirement is judged, and if the required salt content is not met, the salt content or the fresh water is repeatedly debugged in a manner of adding the salt water or the fresh water until the salt content of the mixed water meets the expected requirement. The method has the following disadvantages: 1) in order to realize the mixed irrigation of the salt water and the fresh water, at least two wells need to be drilled in the same irrigation area, so that the investment of an irrigation system is obviously increased; 2) the mixing and stirring tank arranged on the ground not only needs to occupy partial land, but also needs to invest certain capital construction, and can further reduce the economic and ecological benefits of the irrigation system.

Disclosure of Invention

An object of the embodiment of the present application is to provide a water intaking system, which is used for improving the problem of large investment cost of an irrigation system in the prior art.

In a first aspect, an embodiment of the present application provides a water intake system, which includes: a water lifting device and a control device;

the control device is connected with the water lifting device and is used for controlling the water lifting device to extract fresh water and salt water according to a preset water quantity proportion;

and the water lifting device is used for respectively extracting fresh water and salt water according to the preset water quantity proportion, and mixing the fresh water and the salt water according to the preset water quantity proportion and then conveying the mixture to a water supply pipeline.

In the implementation process, the control device controls the water lifting device to extract fresh water and salt water according to the preset water quantity proportion, so that the water lifting device can respectively extract the fresh water and the salt water according to the preset water quantity proportion, then the fresh water and the salt water are mixed and then are conveyed to a water supply pipeline, the mixing of the fresh water and the salt water can be completed through the water lifting device, the fresh water and the salt water can be realized only by drilling a well, a ground stirring and mixing tank is not required to be arranged, and the investment cost of an irrigation system is greatly reduced.

Optionally, the water lifting device comprises:

fresh water lifting device, isolation device, salt water lifting device and mixed water lifting device;

the fresh water lifting device is connected with the isolation device and the mixed water lifting device and is used for extracting a first amount of fresh water;

the saline water extracting device is connected with the mixed water extracting device and is used for extracting saline water with a second water quantity, wherein the ratio of the first water quantity to the second water quantity is the preset water quantity ratio;

the isolation device is used for isolating the fresh water layer and the salt water layer;

the mixed water extraction device is used for mixing the extracted fresh water and the extracted salt water and then conveying the mixture to a water supply pipeline.

In the implementation process, the fresh water layer and the salt water layer are isolated by the isolating device, so that the fresh water extracting device and the salt water extracting device can respectively extract pure fresh water and pure salt water, and more accurate mixing can be realized when the follow-up fresh water and salt water flow into the mixed water extracting device.

Optionally, the isolation device comprises:

a first flange, a second flange and a spacer;

the isolating piece is arranged between the first flange and the second flange, and the first flange and the second flange are oppositely arranged.

In the implementation process, the isolation effect of the isolation device can be simply achieved between the flange and the isolation piece, and the cost is lower.

Optionally, the first flange includes a first connecting hole, a first water passing hole and a first cable hole, the second flange includes a second connecting hole, a second water passing hole and a second cable hole, and the spacer includes a third connecting hole, a third water passing hole and a third cable hole;

the first connecting hole, the second connecting hole and the third connecting hole correspond in position, and the first flange, the second flange and the isolating piece are connected through the connecting holes;

the first cable hole, the second cable hole and the third cable hole correspond in position and are used for providing a channel for a cable connected between the control device and the fresh water lifting device;

the first water passing hole, the second water passing hole and the third water passing hole correspond in position and are used for providing a channel for a fresh water lifting pipe for conveying fresh water.

In the implementation process, the cable channel is provided in the isolation device, so that the control device can be conveniently connected with the water lifting device, and the water passing channel is provided in the isolation device, so that the fresh water can be conveniently conveyed under the condition of isolating the fresh water and the salt water.

Optionally, a first water stopping disc is arranged in a cable hole of the first flange, and a second water stopping disc is arranged in a cable hole of the second flange;

the first water stopping disc comprises a first water stopping disc framework and a first cylindrical structure;

the second water stopping disc comprises a second water stopping disc framework and a second cylindrical structure;

the first water stopping disc framework comprises a first cylinder and a convex edge formed on the outer peripheral surface of one end of the first cylinder, and the first cylindrical structure is provided with an annular groove corresponding to the first cylinder;

the second water stop disc framework comprises a second cylinder and a convex edge formed on the outer peripheral face of one end of the second cylinder, and the second cylindrical structure is provided with an annular groove corresponding to the second cylinder.

In the implementation process, the sealing of the cable hole can be realized by arranging the water stopping disc so as to better isolate fresh water and salt water.

Optionally, the fresh water lifting device comprises:

a fresh water lift pump and a fresh water lift pipe;

the fresh water lift pump is connected with the fresh water lift pipe and used for pumping fresh water from the fresh water layer and conveying the pumped fresh water to the mixed water lift device through the fresh water lift pipe.

In the implementation process, the extraction of the fresh water can be completed by arranging the simple fresh water lifting device.

Optionally, the salt water lifting device comprises:

a salt water lift pump and a salt water lift pipe;

the salt water extraction pump is connected with the salt water extraction pipe and used for extracting salt water from a salt water layer and conveying the extracted salt water to the mixed water extraction device through the salt water extraction pipe.

In the implementation process, the extraction of the salt water can be completed by arranging the simple salt water extracting device.

Optionally, the hybrid water lifting device comprises:

mixing a water extraction pipe, a check valve and a gate valve;

the check valve and the gate valve are arranged on the mixed water extraction pipe;

the mixed water lifting pipe is used for conveying the mixed fresh water and the mixed salt water to the water supply pipeline;

and the gate valve is used for controlling the delivery quantity of the mixed fresh water and the mixed salt water by the mixed water lifting pipe.

In the implementation process, the water extraction can be controlled by the mixed water extraction device, so that the problem of waste caused by excessive extraction is avoided.

Optionally, the control device comprises:

the device comprises a conductivity-temperature probe, an electromagnetic flowmeter, a remote pressure gauge, frequency conversion equipment and a central controller;

the conductivity-temperature probes are arranged on the fresh water lifting device, the salt water lifting device and the mixed water lifting device, are connected with the central controller through cables and are used for detecting the conductivity and the temperature of the fresh water and the salt water;

the electromagnetic flow meter is arranged on the fresh water lifting device and the salt water lifting device, is connected with the central controller through a lead and is used for detecting the lifting amount of fresh water and salt water;

the remote transmission pressure gauge is arranged on the mixed water lifting device and is used for detecting the water outlet pressure of the mixed water lifting device;

the frequency conversion equipment is connected with the fresh water lifting device and the salt water lifting device and is used for controlling the water lifting amount of the fresh water lifting device and the salt water lifting device;

and the central controller is used for adjusting the power of the frequency conversion equipment according to the preset water quantity proportion so as to enable the fresh water lifting device and the salt water lifting device to extract fresh water and salt water according to the preset water quantity proportion.

In the implementation process, the proportion of fresh water and salt water can be calculated by detecting the conductivity and the temperature of the fresh water and the salt water, and the water yield extraction control of the fresh water and the salt water can be realized through the frequency conversion equipment, so that the salt water and the fresh water can be taken as required in the water lifting device, the precise mixing can be realized according to the preset water yield proportion, the condition that the proportion of the fresh water and the salt water is not proper after the fresh water and the salt water are lifted to the ground can be avoided, the irrigation control difficulty is greatly reduced, and the resource waste is reduced.

Optionally, the central controller is configured to calculate the salt content of the fresh water and the salt content of the salt water according to the conductivity and the temperature of the fresh water and the salt water detected by the conductivity-temperature probe;

the central controller is used for calculating and obtaining the current water volume proportion of the extracted fresh water and the extracted salt water according to the salt content of the fresh water and the salt content of the salt water;

and the central controller is used for controlling the frequency conversion equipment to regulate and control the water lifting amount of the fresh water lifting device and the salt water lifting device according to the current water amount proportion and the preset water amount proportion.

In the implementation process, the central controller can be used for calculating the extraction ratio of the salt water and the fresh water, so that the extraction ratio of the salt water and the fresh water can be adjusted, the salt water and the fresh water can be accurately mixed, and the condition that the mixing ratio is not proper is avoided.

Optionally, the water intake system further comprises:

a motor-pumped well device for housing the water lift device;

the motor-pumped well device comprises:

the well pipe, the first filter pipe and the second filter pipe;

the water lifting device is arranged in the well pipe, and the well pipe is used for isolating the water lifting device from the external environment;

the first filtering pipe is arranged on the fresh water layer and the well pipe and is used for filtering fresh water from the external environment into the well pipe;

the second filtering pipe is arranged on the salt water layer and arranged on the well pipe and used for filtering salt water from the external environment into the well pipe.

In the above-mentioned realization process, through setting up the motor-pumped well device, can make water lifting device keep apart with external environment to in filtering the well casing with fresh water and salt water in the external environment, thereby can extract more pure fresh water and salt water, avoid mixing other impurity and produce the problem of influence to quality of water.

Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a first structural schematic diagram of a water intake system according to an embodiment of the present disclosure;

fig. 2 is a second schematic structural diagram of a water intake system according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a motor-pumped well device according to an embodiment of the present disclosure;

fig. 4 is a detailed structural schematic diagram of a water intake system according to an embodiment of the present disclosure;

fig. 5 is a schematic structural view of a fresh water lifting device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of an isolation device according to an embodiment of the present disclosure;

fig. 7 is a schematic view of an installation structure of an isolation device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a water stopping disc provided in an embodiment of the present application;

fig. 9 is a schematic view of flow rate adjustment provided in an embodiment of the present application.

Icon: 100-a water intake system; 110-a control device; 111-conductivity-temperature probe; 112-an electromagnetic flow meter; 113-remote pressure gauge; 114-frequency conversion equipment; 115-a central controller; 120-a water lifting device; 122-fresh water lifting device; 1222-fresh water pump; 1224-fresh water extracting pipe; 124-an isolation device; 1241-a first flange; 12412-first connection hole; 12414-first water passing hole; 12416-first cable hole; 1242-second flange; 12422-second connection hole; 12424-second water passing hole; 12426-second cable hole; 1243-spacers; 12432-third connection hole; 12434-third water passing hole; 12436-third Cable hole; 1244-a first water stopping disc framework; 1246-first cylindrical structure; 126-a salt water lifting device; 1262-saline water pump, 1264-saline water extracting pipe; 128-a mixed water lifting device; 1282-mixed water extraction pipe; 1284-check valve; 1286-gate valve; 130-a motor-pumped well device; 131-a wellbore; 1311-a well platform; 132-a well tubular; 134-a first filtering pipe; 136-second filtering conduit.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, and are only for convenience of description and simplification of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a water intake system 100 according to an embodiment of the present application, where the water intake system 100 includes a water lifting device 120 and a control device 110, the control device 110 is configured to control the water lifting device 120 to extract fresh water and salt water according to a preset water quantity ratio, the water lifting device 120 is configured to extract fresh water and salt water according to the preset water quantity ratio, and then mix the extracted fresh water and salt water with the preset water quantity ratio and deliver the mixture to a water supply pipeline; therefore, the water taking system 100 can simultaneously extract the salt water and the fresh water without respectively adopting a fresh water well to extract the fresh water and a salt water well to extract the salt water, the salt water and the fresh water can be extracted by drilling one hole, a ground stirring and mixing pool is not required to be arranged, and the investment cost of an irrigation system is greatly reduced.

In some embodiments, the control device 110 may be a processor, which may be an integrated circuit chip having signal processing capabilities. The Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. Which may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

In some embodiments, as shown in fig. 2, in order to facilitate the deployment of the water lifting device 120, the water intake system 100 may further include a motor-pumped well device 130, the motor-pumped well device 130 is used for accommodating the water lifting device 120, the motor-pumped well device 130 may be understood as an external environment device deployed during well drilling, the water lifting device 120 may be cylindrical, and the water lifting device 120 may be vertically placed into the motor-pumped well device 130, so that deep layer fresh water and shallow layer salt water can be extracted.

The motor-pumped well device 130 can isolate the water lifting device 120 from the external environment, so that purer fresh water and salt water can be extracted, and the problem that other impurities (such as soil) are mixed to influence the water quality is avoided. The motor-pumped well device 130 may be a hollow cylinder, and of course, the motor-pumped well device 130 may also be a hollow device with other shapes, and the cavity in the middle of the motor-pumped well device may be used for placing the water lifting device 120. In the irrigation system, a certain depth may be drilled into the ground through a well drilling device, and then a shaft 131 (i.e., a hollow barrel) is disposed, the shaft 131 is a building for taking the groundwater, and the shaft 131 may be cylindrical, and the depth and diameter thereof may be determined according to the water quantity and quality condition of the groundwater investigated in advance. The upper end of the wellbore 131 may be provided with a well 1311, primarily for supporting the water lift 120, which well 1311 may be constructed of concrete or other material that meets the strength requirements.

The motor-pumped well device 130 can be arranged in the shaft 131, so that the water lifting device 120 can extract fresh water and salt water, and because the fresh water layer and the salt water layer are positioned at different depths, when the water lifting device 120 is arranged in the motor-pumped well device 130, the requirements of different depths of the fresh water layer and the salt water layer are met, so that the fresh water and the salt water are respectively extracted.

In some embodiments, as shown in fig. 3, the pumped well device 130 can include a well tubular 132, a first filter tube 134, and a second filter tube 136.

Wherein the well pipe 132 is hollow, the well pipe 132 can be disposed in the wellbore 131, and the water lifting device 120 can be disposed in the well pipe 132, the well pipe 132 being used to isolate the water lifting device 120 from the external environment. In particular, the well pipe 132 is mainly used for supporting the well wall to prevent soil or rocks from entering the well pipe 132, which affects the installation and water-lifting effect of the water-lifting device 120. The well pipe 132 does not have a water permeable function and may be made of a concrete pipe, a steel pipe, or other material pipes satisfying strength requirements.

A first filter pipe 134 may be disposed in the fresh water layer and on the well casing 132 for filtering fresh water from the outside environment into the well casing 132. The first filtering pipe 134 has a water permeable function and a certain strength, and can prevent soil or stones from entering the well pipe 132, the installation depth of the first filtering pipe 134 can be determined according to the depth of the fresh water layer, and the length of the first filtering pipe 134 is determined according to the thickness and the collection capacity of the aquifer, so that fresh water in the underground aquifer can enter the well pipe 132 for being pumped by the water pumping device 120.

A second filter pipe 136 may be provided in the salt water layer and on the well pipe 132 for filtering salt water from the external environment into the well pipe 132. The second filtering pipe 136 has a water permeable function and a certain strength similar to the first filtering pipe 134, the installation depth of the second filtering pipe 136 can be determined according to the depth of the salt water layer, and the length of the second filtering pipe 136 is determined according to the thickness and the collecting capacity of the aquifer, so that the salt water in the underground aquifer can enter the inside of the well pipe 132 for being pumped by the water pumping device 120.

Since the depth of the fresh water layer is different from that of the salt water layer, the first filtering pipes 134 and the second filtering pipes 136 may have the well pipes 132 therebetween, i.e., the filtering pipes on the well pipes 132 are alternately installed. The number of the first filtering pipe 134 and the second filtering pipe 136 is not particularly limited, and a corresponding number of filtering pipes may be provided according to an actual cost requirement or a water quality requirement.

In the above implementation process, by providing the motor-pumped well device 130, the water lifting device 120 can be isolated from the external environment, so that fresh water and salt water in the external environment can be filtered into the well pipe 132, and therefore purified fresh water and salt water can be extracted, and the problem that other impurities are mixed to influence water quality is avoided.

In some embodiments, in order to avoid the problem that the fresh water and the salt water filtered by the motor-pumped well device 130 are mixed in the well pipe 132 to affect the subsequent mixing ratio of the fresh water and the salt water, the well pipe 132 is not completely communicated, and an isolation device 124 for isolating the filtered fresh water and the filtered salt water may be disposed therebetween.

For convenience of understanding, please refer to fig. 4 below, and fig. 4 is a schematic structural diagram of a water getting system 100 according to an embodiment of the present disclosure in detail. In some embodiments, the water lifting device 120 is used to separately extract fresh water and salt water, and since the fresh water and salt water are at different depths, the lifting device may include a fresh water lifting device 122, an isolation device 124, a salt water lifting device 126, and a mixed water lifting device 128, wherein the fresh water lifting device 122 is located at the fresh water layer for extracting fresh water, and the salt water lifting device 126 is located at the salt water layer for extracting salt water.

The isolating device 124 is used for isolating the fresh water extracting device 122 and the salt water extracting device 126, so as to avoid the problem that the ratio of the subsequent fresh water to the salt water is inappropriate because the fresh water extracting device 122 extracts the salt water and the salt water extracting device 126 extracts the fresh water.

The fresh water lift 122 is connected to the separator 124 and the mixed water lift 128 for extracting a first quantity of fresh water.

The salt water extracting device 126 is connected with the mixed water extracting device 128 and is used for extracting the salt water of the second water quantity, and the ratio of the first water quantity to the second water quantity is a preset water quantity ratio.

The isolation device 124 is used to isolate the fresh water layer from the salt water layer so that the fresh water and salt water do not mix within the well pipe 132.

The fresh water extraction device 122 delivers the extracted fresh water to the mixed water extraction device 128, the salt water extraction device 126 delivers the extracted salt water to the mixed water extraction device 128, and the mixed water extraction device 128 mixes the fresh water and the salt water and delivers the mixed water to the water supply pipeline.

In the implementation process, the fresh water layer and the salt water layer are isolated by the isolation device 124, so that the fresh water extraction device 122 and the salt water extraction device 126 can respectively extract relatively pure fresh water and salt water, and the subsequent fresh water and salt water can be more accurately mixed when flowing into the mixed water extraction device 128.

As shown in fig. 5, in some embodiments, the fresh water lift device 122 includes a fresh water lift pump 1222 and a fresh water lift pipe 1224, and the fresh water lift pump 1222 is connected to the fresh water lift pipe 1224 for extracting fresh water from the fresh water layer and delivering the extracted fresh water to the hybrid lift device 128 through the fresh water lift pipe 1224.

To facilitate the extraction of fresh water, the fresh water lift 122 is located in the fresh water layer, and since the fresh water layer is deeper than the salt water layer, the fresh water lift 122 is located in the lower layer of the well pipe 132, while the salt water lift 126 is located in the salt water layer, and in the upper layer of the well pipe 132, the salt water lift 126 is located above the fresh water lift 122 in terms of relative position.

The fresh water pumping pump 1222 comprises a motor, a water inlet, and an impeller, and is made of iron, PVC, PE, or other common pipe materials, wherein the motor can be connected to the control device 110, and is controlled by the control device 110, so as to control the pumping amount of fresh water.

Since fresh water needs to be delivered to the hybrid water lift 128 and the fresh water and salt water layers are isolated by the isolation device 124, the fresh water lift pipe 1224 needs to communicate through the isolation device 124 to the hybrid water lift 128. The specific implementation mode can be as follows: the fresh water extracting pipe 1224 is divided into two or more branches after passing through the isolating device 124, and the two branches in the embodiment of the present application can bypass the salt water extracting device 126, so that the fresh water and the salt water can be separately conveyed while the occupied space is reduced.

In some embodiments, the salt water lift device 126 may include a salt water lift pump 1262 and a salt water lift pipe 1264, the salt water lift pump 1262 being connected to the salt water lift pipe 1264 for pumping salt water from the salt water layer and delivering the pumped salt water to the mixed water lift device 128 through the salt water lift pipe 1264.

The salt water pump 1262 may also include a motor, a water inlet and an impeller, and is made of iron, PVC, PE or other common pipe materials, and the motor may be connected to the control device 110 and controlled by the control device 110, so as to control the amount of extracted salt water.

The brine extraction pipe 1264 may be in direct communication with the mixed water extraction device 128, and may in turn directly deliver brine to the mixed water extraction device 128.

In some embodiments, the mixed water lift device 128 may include a mixed water lift pipe 1282, a check valve 1284, and a gate valve 1286, wherein the check valve 1284 and the gate valve 1286 are disposed on the mixed water lift pipe 1282 intermediate the mixed water lift pipe 1282 and the water supply pipeline, the mixed water lift pipe 1282 is configured to deliver the mixed fresh water and the salt water to the water supply pipeline, and the gate valve 1286 is configured to control the delivery amount of the mixed fresh water and the salt water by the mixed water lift pipe 1282.

In order to save the layout space, the fresh water lifting pipe 1224 can be divided into two branches by the isolation device 124, the other ends of the two branches are communicated with the mixed lifting pipe 1282, and the salt water lifting pipe 1264 is directly communicated with the mixed lifting pipe 1282, so that the fresh water and the salt water can be mixed in the mixed lifting pipe 1282.

In order to increase the conveying capacity of the salt water and the fresh water, the diameter of the mixed water lifting pipe 1282 can be larger than that of the salt water lifting pipe 1264, so that the conveying speed of the salt water and the fresh water can be increased.

The check valve 1284 may be used to prevent water hammer from damaging the fresh water pump 1222 and the salt water pump 1262 when the system is shut down, and the gate valve 1286 may be used to control and regulate the amount of water supplied to the water supply pipeline by the water pump 120.

In some embodiments, as shown in fig. 6, the isolation device 124 may include a first flange 1241, a second flange 1242, and an isolator 1243, the isolator 1243 being disposed between the first flange 1241 and the second flange 1242, the first flange 1241 and the second flange 1242 being disposed opposite each other.

In order to achieve the isolation effect of the fresh water and the salt water, the spacer 1243 may be made of a flexible isolation material, and the material of the first flange 1241 and the second flange 1242 may be determined according to the material of the fresh water extraction pipe 1224, and may be metal, PVC, PE, or other materials.

In order to facilitate the installation of the isolation device 124 in the well casing 132, the first flange 1241 and the second flange 1242 are matched to the shape of the well casing 132, and if the well casing 132 is cylindrical, the first flange 1241 and the second flange 1242 are also circular and have a diameter slightly smaller than the inner diameter of the well casing 132, so that the two flanges can move up and down in the well casing 132 for easy installation.

The spacer 1243 is installed between the two flanges and has the same diameter as the inner diameter of the well pipe 132, so that the salt water and the fresh water can be better isolated, and the diameter of the spacer 1243 is larger than the diameters of the two flanges. The spacer 1243 has a certain strength and flexibility, so that the strength can isolate the mixture of the upper and lower aquifers (i.e. fresh water layer and salt water layer), and the flexibility can satisfy the requirement that the water lifting device 120 can be lifted and installed under the condition of a certain external force, and the water lifting device 120 cannot be clamped in the well pipe 132 due to the overlarge strength.

In some embodiments, the first flange 1241, the spacer 1243 and the second flange 1242 are connected in series in sequence, may be fixed by a connector, and may be provided with a water penetration hole in order to facilitate the fresh water supply pipe 1224 to penetrate therethrough. In a specific implementation, the first flange 1241 includes a first connection hole 12412, a first water passing hole 12414 and a first cable hole 12416, the second flange 1242 includes a second connection hole 12422, a second water passing hole 12424 and a second cable hole 12426, and the spacer 1243 includes a third connection hole 12432, a third water passing hole 12434 and a third cable hole 12436.

Here, the first, second, and third connection holes 12412, 12422, and 12432 correspond in position so that the first, second, and

partition members

1241, 1242, and 1243 can be connected through the connection holes. These attachment holes may be screw holes, i.e., the first flange 1241, the second flange 1242 and the spacer 1243 are fixedly attached by screws.

Or, the first flange 1241, the second flange 1242 and the spacer 1243 may be integrally formed, or may be connected together by riveting or welding (in this way, a riveting piece or a welding piece may pass through the connecting hole to connect the first flange 1241, the second flange 1242 and the spacer 1243), and only the cable hole and the water through hole need to be reserved.

In order to make the connection between the first flange 1241, the second flange 1242 and the spacer 1243 more secure and not easy to fall off, the first connection hole 12412, the second connection hole 12422 and the third connection hole 12432 may be a plurality of holes, and the number of the connection holes is the same, and the positions of the connection holes correspond to one another.

The first cable hole 12416, the second cable hole 12426 and the third cable hole 12436 are correspondingly positioned to provide a passage for the cable connected between the control device 110 and the fresh water lifting device 122. Specifically, the control device 110 is connected to the fresh water lift pump 1222 of the fresh water lift device 122 via a cable, and the cable passes through the cable hole. Wherein the diameter of the third cable hole 12436 may correspond to the diameter of a cable, and the diameters of the first cable hole 12416 and the third cable hole 12436 may be slightly larger than the diameter of a cable, which may facilitate routing of cables.

The first water passing hole 12414, the second water passing hole 12424 and the third water passing hole 12434 are correspondingly positioned to provide a passage for the fresh water lifting pipe 1224 for transporting fresh water. That is, if the upper flange is referred to as a first flange 1241 and the lower flange is referred to as a second flange 1242, the fresh water lifting pipe 1224 passes through the second flange 1242, the spacer 1243 and the first flange 1241 in sequence.

Since the fresh water extracting pipe 1224 is divided into two branch pipes after passing through the separating device 124, the first flange 1241 may have two first water passing holes 12414, the second flange 1242 may have one water passing hole, and the separating member 1243 may also have one water passing hole, and the specific installation structure is shown in fig. 7, such that the fresh water extracting pipe 1224 is divided into two branch pipes after passing through the separating member 1243, and the two branch pipes are connected to the mixing water extracting device 128 after passing through the first flange 1241, of course, if the fresh water extracting pipe 1224 is divided into N branch pipes after passing through the separating member 1243, the first flange 1241 provides N first water passing holes 12414.

Alternatively, in order to reduce the complexity of the structure of the isolating device 124, the first flange 1241 may have only one first water passing hole 12414, and the fresh water lifting pipe 1224 is divided into N branch pipes after passing through the first flange 1241 and then connected to the hybrid water lifting device 128, so that there is no need to provide more water passing holes for the first flange 1241.

In some embodiments, the first flange 1241, the second flange 1242 and the spacer 1243 are provided with a plurality of through holes, which may allow the salt water and the fresh water to permeate, thereby affecting the subsequent mixing ratio of the salt water and the fresh water, so to avoid this, a first water stopping disk may be provided on the first flange 1241, and a second water stopping disk may be provided on the second flange 1242.

A first water-stopping disk is arranged in the first cable hole 12416, and a second water-stopping disk is arranged in the second cable hole 12426, so that the exchange of fresh water and salt water through the cable holes can be prevented. Of course, if the fresh water supply pipe 1224 is not tightly sealed to the water flow opening, a water stop plate may be disposed in the water flow opening.

The structure of first stagnant water dish and second stagnant water dish is the same, as shown in fig. 8, first stagnant water dish includes first stagnant water dish skeleton 1244 and first tubiform structure 1246, and first stagnant water dish skeleton 1244 includes first barrel and the protruding edge that forms in the outer peripheral face of the one end of first barrel, and the annular groove that corresponds with first barrel is seted up to first barrel structure.

The second water stopping disc comprises a second water stopping disc framework and a second cylindrical structure, the structure of the second water stopping disc framework is the same as that of the first water stopping disc, the second water stopping disc framework comprises a second cylindrical body and a convex edge formed on the outer peripheral face of one end of the second cylindrical body, and an annular groove corresponding to the second cylindrical body is formed in the second cylindrical structure.

The shape and size of this first stagnant water dish and second stagnant water dish and the shape and size of cable hole or water hole match, and wherein, the annular groove is inflation rubber groove, and like this tubular structure can realize the inflation after meeting water to can realize closely the compaction with cable or fresh water lift pipe 1224, reach the effect that blocks water.

In some embodiments, continuing with fig. 4, the control device 110 may include a conductivity-temperature probe 111, an electromagnetic flow meter 112, a remote pressure gauge 113, a variable frequency device 114, and a central controller 115.

Conductivity-temperature probes 111 are disposed on the fresh water lift 122, the salt water lift 126 and the mixed lift 128, and are connected to the central controller 115 via cables for detecting the conductivity and temperature of the fresh water and the salt water.

The electromagnetic flow meters 112 are disposed on the fresh water lifting device 122 and the salt water lifting device 126, and connected to the central controller 115 through wires for detecting the lifting amount of the fresh water and the salt water.

The remote pressure gauge 113 is disposed on the mixed water lifting device 128 and is used for detecting the water outlet pressure of the mixed water lifting device 128.

The frequency conversion device 114 is connected with the fresh water lifting device 122 and the salt water lifting device 126 and is used for controlling the lifting amount of the fresh water lifting device 122 and the salt water lifting device 126.

And the central controller 115 is used for adjusting the power of the frequency conversion equipment 114 according to the preset water quantity proportion so that the fresh water lifting device 122 and the salt water lifting device 126 can extract fresh water and salt water according to the preset water quantity proportion.

Specifically, the conductivity-temperature probe 111 is disposed in a raised cavity disposed on the fresh water lifting pipe 1224, the salt water lifting pipe 1264, and the mixed water lifting pipe 1282, so that water flow in the cavity is stable, and influence of water fluctuation in the pipe on conductivity measurement can be avoided. The conductivity-temperature probe 111 may feed back the water conductivity-temperature in the fresh water lift pipe 1224, the salt water lift pipe 1264, and the mixed lift pipe 1282 to the central controller 115 in real time.

The central controller 115 can calculate the salt content in the fresh water, the salt water and the mixed water through the obtained water conductivity-temperature, and the specific calculation principle is as shown in the following process.

1) Collecting underground water W in the deep layer of the local area_{Bland taste}And shallow underground W_{Salty taste}Water samples are several in terms of W_{Bland taste}:W _{Salty taste}100 percent of fresh water-saline water mixed solution, 100 percent of each mixed solution of fresh water and saline water, 80 percent of each mixed solution, 20 percent of each mixed solution, 60 percent of each mixed solution, 40 percent of each mixed solution, 60 percent of each mixed solution, 20 percent of each mixed solution and 1000 percent of each mixed solution;

2) under the conditions that the temperature is 0 ℃, 5 ℃, 10 ℃, 15 ℃, 20 ℃, 25 ℃, 30 ℃ and 35 ℃, the conductivity value EC of the mixed water is measured by using a conductivity-temperature probe 111, and the conductivity correction formula under different temperature conditions is obtained by using least square regression:

EC₂₅＝EC_T[1+β(T-25)] (1)

in formula (1): EC (EC)₂₅The conductivity value of the mixed water measured at 25 ℃ is in units of mu S/m; EC (EC)_TThe conductivity value of the mixed water measured at the temperature T is measured in the unit of mu S/m; t is the measurement temperature; beta is a fitting parameter;

3) 100mL of mixed water is evaporated to a constant weight by using an evaporating dish at 105 +/-2 ℃, and the salt content in the mixed water is determined by a gravimetric method, wherein the calculation formula is as follows:

in formula (2): c is the salt content, and the unit is mg/L; m is the total weight of the evaporating dish and the residue, and the unit is g; m₀Is the weight of the evaporating dish and is expressed in g; v is the volume of the water sample in mL.

4) The linear relationship between the salt content and the conductivity value of the water sample at the ambient temperature of 25 ℃ is obtained by using least square regression, and is shown as the following formula:

C＝k×EC₂₅+b (3)

in formula (3): k and b are fitting coefficients respectively, and C represents the salt content.

5) Upon receiving the measured water temperature and conductivity, the central controller 115 first converts the measured water EC into EC according to equation (1)₂₅Then, the salt content (C, mg/L) was calculated by using the formula (3).

Therefore, the central controller 115 can calculate the salt content of the fresh water, the salt content of the salt water, and the salt content of the mixed water according to the above-described manner.

The electromagnetic flow meter 112 may be installed on the fresh water extraction pipe 1224 and the salt water extraction pipe 1264, and connected to the central controller 115 through a cable, which may collect the extraction amount of fresh water and salt water in real time.

The remote pressure gauge 113 can be installed on the upper part of the mixed water lifting pipe 1282, and the water outlet pressure of the mixed water lifting pipe 1282 is monitored in real time in the water lifting process.

The frequency conversion equipment 114 is connected with the motors of the fresh water lift pump 1222 and the salt water lift pump 1262, and can change the frequency of the motors under the control of the central controller 115, so as to change the water lift flow and pressure of the fresh water lift pump 1222 and the salt water lift pump 1262.

After the central controller 115 obtains the water outlet pressure of the mixed water lifting pipe 1282 detected by the remote pressure gauge 113, the frequency conversion device 114 is controlled according to the requirement to adjust the motor frequency of the fresh water lifting pump 1222 and the salt water lifting pump 1262, so as to achieve the expected water outlet pressure.

The central controller 115 can calculate the salt content of the fresh water and the salt content of the salt water according to the water lifting amounts of the fresh water and the salt water, and the electrical conductivities and the temperatures of the fresh water and the salt water, and then control the frequency conversion device 114 to regulate and control the water lifting amounts of the fresh water lifting device 122 and the salt water lifting device 126 according to the current water amount ratio and the preset water amount ratio, so as to change the mixed water amount ratio of the fresh water and the salt water, so that the mixed water amount ratio reaches the preset water amount ratio.

The mixed water quantity proportion adjusting process is as follows:

1) firstly, measuring the temperature and conductivity values of fresh water and saline water, and further calculating the salt content (C) of the fresh water according to the above calculation formula_{Bland taste}mg/L) and salt content (C) of salt water_{Salty taste}，mg/L)。

2) According to the irrigation requirement, the real-time flow requirement Q of the water pump is input into the central controller 115_d(m³H) and the salt content (C) of the mixed water_dmg/L) required.

3) The starting flow rate (Q) of the fresh water lift pump 1222 is calculated according to the following formula_{Light opener}，m³H) and salt water pump 1262 start flow (Q)_{Salty opener}，m³/h)。

4) The water outlet lift H of the wellhead pump is input into the central controller 115_d，m；

5) Estimation of head loss h of fresh water pump pipe by using head loss calculation formula_{Bland property of f}(m) and the loss h of the pipe head of the saline water pump_{f salty taste}(m), the calculation formula is as follows:

in formula (5): h is_fIs the on-way head loss in units of m; f is the coefficient of the loss of the on-way head; q_gIs the pipeline flow, unit L/h; d is the inner diameter of the pipeline in mm; l is the length of the tube in m; m is a flow index; b is the pipe diameter index. Wherein, f, m and b are obtained by querying according to the relevant data of the pipeline material.

6) Calculating the starting lift H of the fresh water pumping pump 1222 and the salt water pumping pump 1262_Light-up(m) and H_{Salt taste improving agent}(m)：

In formula (6): l is_{Bland taste}The distance between the water inlet of the fresh water pumping pump 1222 and the position of the wellhead is m; l is_{Salty taste}The distance between the water inlet of the salt water lifting pump 1262 and the position of a wellhead is m;

7) the central controller 115 selects the working frequency F of the fresh water pump 1222 according to the starting flow and the starting lift of the fresh water pump 1222 and the salt water pump 1262_{Light opener}(Hz) and salt water pump 1262 operating frequency F_{Salty opener}(Hz)；

8) Working frequency F of fresh water pump 1222 obtained according to calculation_{Light opener}(Hz) and salt water pump 1262 operating frequency F_{Salty opener}(Hz) starting the system to work;

9) the water lifting process is carried out, the conductivity and the temperature of the fresh water and the conductivity and the temperature of the salt water are collected once every 5min, and the real-time salt content (C) of the fresh water is calculated_{Bland and solid food}mg/L) and real-time salt content (C) of salt water_{Salty food}，mg/L)；

10) Recalculating the operating frequency F of the fresh water pump 1222 according to the above steps 2) -7)_{Light tune}(Hz) and salt water pump 1262 operating frequency F_{Salty taste}(Hz), and the frequency conversion equipment 114 is controlled to adjust the working frequency of each water pump, so as to adjust the flow of the two water pumps, and enable the irrigation water flow, the outlet pressure and the salt content to reach the design requirements (for example, the water volume proportion of the fresh water and the salt water reaches the preset water volume proportion). The principle is shown in fig. 9, and the specific process is as follows: when water pump lifts water lift H₁Timed, if the actual flow Q of the water pump₂If the calculated flow is exceeded, the frequency of the water pump is changed from f through the frequency conversion equipment 114₁Is adjusted to f₂The pump head-flow curve of the water pump changes to make it in H₁The water lifting flow is reduced to Q under the condition of no change₁(ii) a Vice versa, thereby realizing the adjustment of water extractionAnd controlling, so as to further realize the regulation and control of the proportion of the mixed water.

The operation of the overall water intake system 100 will now be described.

When the motor-pumped well device 130 is constructed, two drainage layers can be arranged according to the water quantity and the water quality characteristics of underground water, and a fresh water filter pipe (such as the first filter pipe 134) and a salt water filter pipe (such as the second filter pipe 136) are arranged in different layers, so that the deep layer fresh water and the shallow layer salt water are collected.

When the water lifting device 120 is installed, the fresh water lifting pump 1222 and the salt water lifting pump 1262 are installed corresponding to different water qualities, and the extraction of fresh water and salt water is isolated by installing the isolation device 124, so that the fresh water and the salt water are accurately mixed. When the water lifting device 120 works, the fresh water lifting pump 1222 and the salt water lifting pump 1262 lift water simultaneously, and the fresh water lifting pipe 1224 and the salt water lifting pipe 1264 lift water and then mix in the mixed water lifting pipe 1282, so that the system investment and management cost for configuring mixed water on the ground surface in the traditional method can be effectively reduced.

After the control unit 110 is installed, when the water lifting device 120 starts lifting water, the conductivity-temperature probe 111 transmits the detected conductivity and temperature to the central controller 115 in real time, meanwhile, the central controller 115 obtains the water outlet pressure of the mixed water lifting pipe 1282 through the remote pressure gauge 113 and obtains the water lifting amount of the salt water and the fresh water through the electromagnetic flow meter 112, whether the mixing ratio of the fresh water and the saline water reaches the preset water quantity ratio can be judged through the data, if the preset water quantity proportion is exceeded (for example, the salt content of the mixed water is higher than the expected value), according to the measured conductivity and flow rate values of the fresh water and the salt water, the output power of the fresh water lifting pump 1222 is controlled to be increased and the output power of the salt water lifting pump 1262 is controlled to be reduced by the frequency conversion equipment 114, and then increasing the fresh water extraction amount and reducing the salt water extraction amount, so that the mixing ratio of the fresh water and the salt water reaches the preset water ratio. If the ratio of the fresh water to the salt water does not reach the preset water ratio (for example, the salt content of the mixed water does not reach the expected value), the output power of the fresh water pumping pump 1222 is controlled to be reduced and the output power of the salt water pumping pump 1262 is controlled to be increased through the frequency conversion device 114 according to the measured conductivity and flow values of the fresh water and the salt water, so that the fresh water extraction amount is reduced and the salt water extraction amount is increased, and the mixed ratio of the fresh water and the salt water reaches the preset water ratio.

Therefore, through the water taking system 100 provided by the embodiment of the application, the deep fresh water and the shallow salt water can be simultaneously extracted in one motor-pumped well, the requirement for drilling two wells originally in the traditional method is reduced to one well, the well drilling investment of a salt water and fresh water mixed irrigation system is greatly reduced, the system investment and the operation cost are reduced, the underground water resource exploitation amount is reduced, and the high efficiency and the sustainable utilization of regional water resources are realized.

In addition, the calculation of the mixing ratio of the fresh water and the salt water is realized by monitoring the conductivity of the fresh water and the salt water, and the water lifting amount of the fresh water lifting pump 1222 and the salt water lifting pump 1262 is controlled by the frequency conversion device 114, so that the fresh water and the salt water can be taken as required in the motor-pumped well, and the precise mixing is realized in the motor-pumped well, the condition that the ratio of the fresh water and the salt water is not proper after being extracted to the ground and the repeated measurement and debugging are needed is avoided, the irrigation control difficulty is greatly reduced, and the energy waste is avoided.

To sum up, the embodiment of the present application provides a water taking system 100, control water lifting device 120 through controlling means 110 and extract fresh water and salt water according to preset water volume proportion for water lifting device 120 can extract fresh water and salt water respectively with preset water volume proportion, then carry water supply pipe after mixing fresh water and salt water, thereby can accomplish the mixture of fresh water and salt water through water lifting device 120, only need to make a hole can realize, also need not to set up ground stirring mixing tank, reduced irrigation system's investment cost widely.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A water intake system, comprising:

a water lifting device and a control device;

2. The water intake system of claim 1, wherein the water lift device comprises:

3. The water intake system of claim 2, wherein the isolation device comprises:

a first flange, a second flange and a spacer;

4. The water intake system of claim 3,

the first flange comprises a first connecting hole, a first water passing hole and a first cable hole, the second flange comprises a second connecting hole, a second water passing hole and a second cable hole, and the isolating piece comprises a third connecting hole, a third water passing hole and a third cable hole;

5. The water intake system of claim 4, wherein a first water stopping disk is disposed in the cable hole of the first flange, and a second water stopping disk is disposed in the cable hole of the second flange;

6. The water intake system of claim 2, wherein the fresh water lift device comprises:

a fresh water lift pump and a fresh water lift pipe;

7. The water intake system of claim 2, wherein the salt water lift comprises:

a salt water lift pump and a salt water lift pipe;

8. The water intake system of claim 2, wherein the hybrid water lift device comprises:

mixing a water extraction pipe, a check valve and a gate valve;

9. The water intake system of claim 2, wherein the control device comprises:

10. The water intake system of claim 1, further comprising:

a motor-pumped well device for housing the water lift device;

the motor-pumped well device comprises:

the well pipe, the first filter pipe and the second filter pipe;