Device for actively absorbing and draining water by utilizing permeation effect and water draining method

Abstract

The invention provides a device for actively absorbing and draining water by utilizing permeation and a drainage method.The device is characterized in that a circulating solution is stored in a reservoir, a solute containing cylinder and a water level sensor are arranged on the wall of the reservoir, a concentration sensor and a drainage pipe are arranged at the bottom of the reservoir, an electric control valve is arranged in the drainage pipe, and one end of an outer pipe is connected with a filter pipe and arranged in a dewatering well; the water pumping inner pipe is arranged in the outer pipe, one end of the water pumping inner pipe is arranged in the filter pipe, the other end of the water pumping inner pipe is connected with the water pump, the water pump pumps out the solution and discharges the solution into the reservoir, and the electric control valve is respectively connected with the concentration sensor and the water level sensor. The drainage method comprises the steps that after the water suction pump is started, due to the fact that the two ends of the outer pipe are in a closed environment, a circulating solution is sucked into the filter pipe through the pipe opening of the pool end of the outer pipe, and the circulating solution is pumped out through the water pumping inner pipe and discharged into the water storage pool to form circulation; under the cooperation of the two sensors and the electric control valve, drainage is achieved.

Description

Technical Field

[0001] The present invention relates to the field of engineering drainage, in particular to a device and a drainage method for actively absorbing and draining water by utilizing osmosis. Background Art

[0002] Drainage engineering is an essential and crucial task in civil engineering. It involves a wide range of fields, including urban construction, roads, bridges, and tunnels, and plays a crucial role in ensuring the smooth progress of projects. For example, foundation pit dewatering, ground drainage and consolidation, and slope interception and drainage all involve the design and construction of drainage engineering. However, in practical engineering, aquifers with low permeability, such as fine sand, silt, silt, and silty clay, are often encountered. The difficulty in draining these strata is that capillary water, under the influence of gravity, is difficult to drain freely.

[0003] Common drainage methods for these formations include vacuum tube wells, light wellpoints, electroosmosis, and jet wellpoints. However, vacuum tube wells require high airtightness and are prone to clogging; light wellpoints are complex and have limited drawdown per stage; and electroosmosis and jet wellpoints are complex and require significant investment. Therefore, a drainage device and method that is efficient, simple in principle, and economically sound for aquifers with low permeability coefficients is urgently needed. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in existing drainage devices and methods, the present invention provides a device and a drainage method that utilizes osmosis to actively absorb and drain water, the purpose of which is to solve one or some defects in existing drainage devices and methods.

[0005] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0006] A device that uses osmosis to actively absorb and drain water, including a filter tube, an outer tube, an inner pumping tube, a water pump, a water reservoir, a circulating solution, a solute placement tube, a concentration sensor, a water level sensor, an electrically controlled valve, and a drain pipe: It is characterized in that: the water reservoir contains circulating solution, the outer tube is placed in a precipitation well and is connected to the filter tube by a thread, the other end of the outer tube is in the water reservoir and is always below the water level of the circulating solution in the water reservoir during operation of the device, the inner pumping tube is placed in the outer tube, one end of the inner pumping tube is located in the filter tube, and the other end is connected to the water pump, and the extracted solution is discharged into the water reservoir through the water pump, a water level sensor and a solute placement tube are provided on the wall of the water reservoir, a concentration sensor and a drain pipe are provided on the bottom of the water reservoir, an electrically controlled valve is provided in the drain pipe, and the electrically controlled valve is respectively connected to the concentration sensor and the water level sensor.

[0007] Specifically, when the drainage device of the present invention is in use, the pipe ends at both ends of the outer pipe are in a closed state, which solves the problem of high air tightness requirements for vacuum well pipe dewatering; the components contained in the device are easy to obtain, have low technological content, and are low in cost, which solves the problem of huge economic investment in some traditional methods; as mentioned above, the drainage device and drainage method have simple components, are sturdy and durable, have clear principles, are not difficult to operate, and have a wide range of applications, especially for aquifers with small permeability coefficients, which can greatly improve their drainage efficiency.

[0008] Preferably, the filter tube body is evenly distributed with several permeable holes. The outer surface of the tube is covered with a semipermeable membrane and then a protective sponge to prevent the semipermeable membrane from being scratched by sharp objects in the formation and losing its sealing properties. A lashing net is used to securely bind the protective sponge and semipermeable membrane to the outermost layer. A conical cap is provided at the lower end of the filter tube. The semipermeable membrane and protective sponge wrapped around the filter tube eliminate the problem of well pipe clogging during pumping. The mechanism of actively drawing groundwater through osmosis makes this device suitable for drainage in aquifers with low permeability coefficients.

[0009] Preferably, the semipermeable membrane covering the outside of the filter tube should be an RO membrane. The RO membrane is economical, durable and has a certain degree of air tightness. The RO membrane allows water molecules to pass through, but impurities such as inorganic salts, heavy metal ions, organic matter, colloids, etc. in the water cannot pass through the RO membrane.

[0010] Preferably, the binding net is made of a water-permeable fabric material to reduce the obstruction of groundwater entering the filter pipe, and the conical pipe cap should be easy to penetrate the aquifer.

[0011] Preferably, the outer tube is formed by several straight tubes and several angle tubes connected by threads. The outer tube is threadedly connected to the filter tube at its outlet in the precipitation well. The outer tube outlet in the reservoir is always below the water level of the circulating solution in the reservoir during operation of the device.

[0012] Preferably, the inner pumping pipe is a flexible hose with a smaller diameter than the inner diameter of the outer pipe. A pump connected to the inner pumping pipe can be either a self-priming pump or a submersible pump. Both pumps should discharge the pumped solution into the reservoir, creating a solution circulation system within the drainage system. The solute for the circulating solution should preferably be a low-cost, water-soluble solute, such as sodium chloride, that is easy to handle and poses minimal environmental impact.

[0013] Preferably, the solute placement tube must be located higher than the water level sensor, with sufficient solute placed in the tube. The solute placement tube body must have good water permeability, and the material should preferably be made of fine plastic mesh or permeable woven fabric, and the solute in the tube must not fall.

[0014] The concentration sensor of the present invention can detect the concentration of the circulating solution and set an upper concentration limit. The upper concentration limit shall not be lower than the initial concentration of the circulating solution and shall not be higher than the saturation concentration of the circulating solution. Only when the solution concentration exceeds the set upper concentration limit, the concentration sensor will give a signal feedback to the electronically controlled valve.

[0015] The water level sensor of the present invention must be located lower than the solute placement tube and higher than the outer pipe well end. The water level sensor can monitor whether the solution water level is higher than its location. Only when the solution water level is higher than the water level sensor, the water level sensor will give signal feedback to the electric control valve.

[0016] The electric-controlled valve of the present invention is placed in the drain pipe and is in a closed state under normal circumstances. The valve switch is controlled by both the concentration sensor and the water level sensor. The electric-controlled valve opens when and only when the electric-controlled valve simultaneously receives signal feedback one sent by the concentration sensor and signal feedback two sent by the water level sensor.

[0017] On the other hand, a drainage method of a device for actively absorbing and draining water by osmosis is provided, comprising:

[0018] S1. Form a dewatering well to the designed depth by punching or drilling technology;

[0019] S2. Connect several straight tubes to an outer tube of appropriate length and size through threads, and connect the outer tube to a filter tube of appropriate length and size through threads;

[0020] S3. Insert the filter tube and outer tube into the precipitation well to the designed depth;

[0021] S4. Select several straight pipes and several angle pipes and connect them by threads to extend the outer pipe until the other end of the outer pipe is located at a certain depth in the water reservoir;

[0022] S5. Insert the inner pumping pipe continuously from the end of the outer pipe pool until it is inserted into the filter pipe;

[0023] S6. Connect the inner pumping pipe to the pump, and place the pump in the reservoir;

[0024] S7. Pour the circulating solution into the water reservoir. The initial water level must not reach the solute placement cylinder and must not be lower than the outer pipe end. That is, the circulating solution forms a water seal around the outer pipe end.

[0025] S8. Start the water pump. Since both ends of the outer tube are sealed, the circulating solution is sucked into the outer tube through the annular channel between the inner pumping tube and the nozzle at the tank end of the outer tube under the action of the water pump and atmospheric pressure. It is finally drawn out from the inner pumping tube in the filter tube and discharged into the reservoir again through the water pump, forming a circulation of the circulating solution in the drainage device.

[0026] S9. During the circulation of the circulating solution, since the concentration of the circulating solution in the filter tube is much higher than that of the groundwater outside the filter tube, the groundwater outside the filter tube penetrates through the semipermeable membrane wrapped outside the filter tube through the water permeable holes and enters the filter tube under the action of osmosis, and joins the circulating solution in the tube;

[0027] S10. As groundwater enters the filter tube through osmosis and participates in the circulation, the concentration of the circulating solution gradually decreases, causing the water level in the reservoir to rise continuously. When the solution level exceeds the water level sensor, the water level sensor gives the electric control valve a second signal feedback, and the water level continues to rise until it reaches the solute placement cylinder.

[0028] S11, the solute begins to dissolve in the tube, and the concentration of the solution increases again;

[0029] S12. When the solution concentration exceeds the upper limit of the concentration sensor, the concentration sensor gives the electronically controlled valve a signal feedback of one;

[0030] S13: The electronically controlled valve receives signal feedback 1 and signal feedback 2 simultaneously, the valve opens, the solution is discharged from the drain pipe, and the solution level drops rapidly. At this time, the solution concentration is at a high level.

[0031] S14. When the water level in the reservoir is lower than the water level sensor, the second signal feedback disappears, the electronically controlled valve closes, and the circulating solution re-enters the above-mentioned S9 to S13 circulation process at a higher concentration level until the drainage meets the design and construction requirements.

[0032] As a preference, in S2 and S4, the pipes should be tightly connected by threads to ensure the air tightness of the entire pipeline; in S3, the outer pipe together with the filter tube should be inserted into the precipitation well to the designed depth quickly to prevent the precipitation well from collapsing.

[0033] Preferably, in S8, when the water pump is first turned on, the initial water level in the pool will drop slightly, and the water level will reach the lowest point when the water pump draws out the solution into the reservoir. The lowest point should be higher than the pipe outlet at the end of the outer pipe pool.

[0034] The method of the present invention has a wide range of applications and is more suitable for precipitation and drainage of aquifers with small permeability coefficients such as fine sand, silt soil, and silty clay.

[0035] As a preference, considering that the circulating solution may be corrosive, the filter tube and outer tube should be made of materials with a certain degree of corrosion resistance to prevent corrosion of the pipe material from destroying the air tightness. The concentration sensor, water level sensor and electronically controlled valve should all be well protected against corrosion.

[0036] In addition to the technical problems solved by the present invention, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, the present invention provides other technical problems that can be solved, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features, which will be further described in detail in the specific implementation methods.

[0037] When the drainage device of the present invention is in use, a semi-permeable membrane is covered on the outside of the filter tube to protect the sponge, so that the device is prevented from being blocked. By connecting one end of the outer tube to the filter tube and submerging the other end below the liquid level of the circulating solution, a closed environment is formed to construct a circulation channel. A water pump is connected to the inner pumping tube to pump water inside the outer tube so that the circulating solution in the reservoir enters the circulation channel. The water pump discharges the water into the reservoir, forming a circulation of the solution in the device. Due to the concentration difference between the circulating solution and the groundwater in the formation, under the action of osmosis, the groundwater is actively sucked into the drainage device to participate in the solution circulation. Through the coordination and action relationship between the solute placement cylinder, the water level sensor, the concentration sensor, and the electrically controlled valve, the circulating solution can always maintain a certain concentration to produce an osmotic effect on the groundwater and ultimately meet the drainage requirements for aquifers with a small permeability coefficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the filter tube structure of the present invention.

[0039] Figure 2 Schematic diagram of the outer tube structure of the present invention.

[0040] Figure 3 Schematic diagram of S1, S2, S3, and S4 in the drainage method of the present invention.

[0041] Figure 4 Schematic diagram of S5, S6, and S7 in the drainage method of the present invention.

[0042] Figure 5 Schematic diagram of S8 and S9 in the drainage method of the present invention.

[0043] Figure 6 Schematic diagram of S10 in the drainage method of the present invention.

[0044] Figure 7 Schematic diagram of S11, S12, and S13 in the drainage method of the present invention.

[0045] Figure 8 Schematic diagram of S14 in the drainage method of the present invention.

[0046] Figure 9 Schematic diagram of the change in concentration of the circulating solution during the drainage method of the present invention.

[0047] Figure 10Schematic diagram of the change in water level of the circulating solution in the reservoir during the drainage method of the present invention.

[0048] Among them: 1. Filter tube; 2. Outer tube; 3. Inner pumping tube; 4. Pumping pump; 5. Reservoir; 6. Circulating solution; 7. Solute placement cylinder; 8. Concentration sensor; 9. Water level sensor; 10. Electric control valve; 11. Drain pipe; 1-1. Binding net; 1-2. Semipermeable membrane; 1-3. Water-permeable hole; 1-4. Protective sponge; 1-5. Conical pipe cap; 2-1. Straight pipe; 2-2. Angle pipe. DETAILED DESCRIPTION

[0049] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0050] Please refer to Figure 1 、 Figure 2 、 Figure 4 The present invention provides a device for actively absorbing and draining water by osmosis, comprising a filter tube 1, an outer tube 2, an inner pumping tube 3, a pumping pump 4, a reservoir 5, a circulating solution 6, a solute placement cylinder 7, a concentration sensor 8, a water level sensor 9, an electric control valve 10, and a drain pipe 11. The reservoir 5 contains the circulating solution 6, the outlet of the outer tube 2 placed in the precipitation well is connected to the filter tube 1 through a thread, and the outlet of the outer tube 2 in the reservoir 5 is always located below the water level of the circulating solution 6 in the reservoir 5 during the operation of the device; the inner pumping tube 3 is placed inside the outer tube 2. One end of the inner pumping pipe 3 is located inside the filter tube 1, and the other end is connected to the pump. The solution pumped out by the pump is discharged into the reservoir. In this embodiment, the pump 4 is placed inside the reservoir 5. Of course, the pump 4 can also be placed next to the reservoir. A water level sensor 9 and several solute placement cylinders 7 are installed on the wall of the reservoir 5, and a concentration sensor 8 is installed at the bottom of the reservoir. A drain pipe 11 is installed at the bottom of the wall of the reservoir 5. An electric control valve 10 is installed in the drain pipe 11. The electric control valve 10 is connected to the concentration sensor 8 and the water level sensor 9 respectively. The solute of the circulating solution 6 should preferably be selected from sodium chloride, which is low-cost, easily soluble in water, and the solution formed is easy to handle and has low environmental pollution.

[0051] For further reference, Figure 1For ease of understanding, the outer wrapping of the tube is drawn in layers in the figure. In fact, the outer wrapping of the tube should be tightly wrapped. The filter tube 1 is evenly arranged with a number of water-permeable holes 1-3, and the outer surface of the tube is covered with a layer of semipermeable membrane 1-2, and then covered with a layer of protective sponge 1-4 to prevent the semipermeable membrane 1-2 from being scratched by sharp objects in the formation and losing its airtightness. The outermost layer is firmly tied with a tying net 1-1 to tie the protective sponge 1-4 and the semipermeable membrane 1-2. A conical tube cap 1-5 is provided at the lower end of the filter tube 1.

[0052] Furthermore, the semipermeable membrane 1-2 is an RO membrane. The RO membrane is economical, durable and has a certain air tightness. The RO membrane allows water molecules to pass through, but impurities such as inorganic salts, heavy metal ions, organic matter, colloids, etc. in the water cannot pass through the RO membrane.

[0053] Furthermore, the binding net 1-1 is made of a water-permeable fabric material to reduce the obstruction of groundwater entering the filter pipe, and the conical pipe cap 1-5 should be easy to penetrate the aquifer.

[0054] For further reference, Figure 2 、 Figure 4 The outer tube 2 is formed by a plurality of straight tubes 2-1 and a plurality of angle tubes 2-2 connected by threads. The pipe mouth of the outer tube 2 in the precipitation well is connected to the filter tube 1 by threads. The pipe mouth of the outer tube 2 in the water reservoir 5 is always located below the water level of the circulating solution 6 in the water reservoir 5 during the operation of the device.

[0055] Furthermore, the inner water-pumping pipe 3 is a hose with a diameter smaller than the inner diameter of the outer pipe 2; the water-pumping pump 4 is connected to the inner water-pumping pipe 3, and the water-pumping pump 4 can be a self-priming pump or a submersible pump, but both should discharge the extracted solution into the water reservoir 5 to form a solution circulation in the drainage device.

[0056] It should also be noted that the water pump 4 is a technically mature product on the market, and the present invention will not elaborate on its working principle and internal structure.

[0057] The solute placing tube 7 of the present invention must be located higher than the water level sensor 9, and sufficient solute must be placed in the tube. The body of the solute placing tube 7 must have good water permeability, and the material should be made of fine plastic mesh or permeable woven fabric, and the solute in the tube cannot fall.

[0058] The concentration sensor 8 of the present invention can detect the concentration of the circulating solution 6 and set an upper concentration limit. The upper concentration limit shall not be lower than the initial concentration of the circulating solution 6 and shall not be higher than the saturation concentration of the circulating solution. Only when the solution concentration exceeds the set upper concentration limit, the concentration sensor 8 shall give a signal feedback to the electronically controlled valve 10.

[0059] The position of the water level sensor 9 of the present invention must be lower than the solute placement tube 7 and higher than the pipe mouth of the well end of the outer tube 2. The water level sensor 9 can monitor whether the water level of the solution is higher than its position. Only when the water level of the solution is higher than the water level sensor 9, the water level sensor 9 should give signal feedback 2 to the electric control valve 10.

[0060] The electrically controlled valve 10 of the present invention is placed in the drain pipe 11 and is in a closed state under normal circumstances. The valve switch is dual-controlled by the concentration sensor 8 and the water level sensor 9. The electrically controlled valve 10 opens when and only when the electrically controlled valve 10 simultaneously receives signal feedback 1 sent by the concentration sensor 8 and signal feedback 2 sent by the water level sensor 9.

[0061] It should also be noted that the water level sensor 9, concentration sensor 8, and electric control valve 10 are already technically mature products on the market, and their internal structures and working principles are no longer described in detail in the present invention.

[0062] On the other hand, please refer to Figures 3 to 8 The present invention provides a drainage method of a device that actively absorbs and drains water by osmosis, comprising the following steps:

[0063] S1. Form a dewatering well to the designed depth by punching or drilling technology;

[0064] S2. Connect several straight tubes 2-1 to outer tubes 2 of appropriate length and size through threads, and connect the outer tubes 2 to filter tubes 1 of appropriate length and size through threads;

[0065] S3, insert the filter tube 1 and the outer tube 2 into the precipitation well to the designed depth;

[0066] Specifically, the process of inserting the outer tube together with the filter tube into the precipitation well should be rapid to prevent the precipitation well from collapsing or breaking down.

[0067] S4, select several straight tubes 2-1 and several angle tubes 2-2 and connect them by thread to extend the outer tube 2 until the other end of the tube is located at a certain depth in the water reservoir 5;

[0068] Specifically, the pipes should be tightly connected by threads to ensure the airtightness of the entire pipeline.

[0069] S5, continuously insert the inner pumping pipe 3 from the pipe opening of the outer pipe 2 until it is inserted into the filter tube 1;

[0070] S6. Connect the inner pumping tube 3 to the water pump 4. The solution pumped out by the water pump 4 is discharged into the water reservoir 5. In this embodiment, the water pump 4 is placed in the water reservoir 5. Of course, the water pump 4 can also be placed next to the water reservoir.

[0071] S7, pouring the circulating solution 6 into the water reservoir 5, requiring that the initial water level must not reach the solute placement tube 7 and must not be lower than the pipe opening at the end of the outer pipe 2, that is, the circulating solution 6 forms a water seal around the pipe opening at the end of the outer pipe 2;

[0072] S8, start the water pump 4. Since the nozzles at both ends of the outer tube 2 are in a sealed state, the circulating solution 6 is sucked into the outer tube 2 through the annular channel between the inner pumping tube 3 and the nozzles at the tank end of the outer tube 2 under the action of the water pump 4 and atmospheric pressure, and is finally drawn out from the inner pumping tube 2 in the filter tube 1, and is discharged into the water reservoir 5 again through the water pump 4, forming a circulation of the circulating solution 6 in the drainage device;

[0073] Specifically, when the water pump 4 is first turned on, the initial water level in the pool will drop slightly, and when the water pump 4 pumps the solution out and discharges it into the water reservoir 5, the water level reaches its lowest point, which should be higher than the outlet of the outer pipe 2 at the pool end.

[0074] S9. During the circulation of the circulating solution 6, since the concentration of the circulating solution in the filter tube 1 is much higher than that of the groundwater outside the filter tube 1, the groundwater outside the filter tube 1 penetrates through the semipermeable membrane 1-2 wrapped around the filter tube 2 through the water permeable holes 1-3 into the filter tube 1 under the action of osmosis and joins the circulating solution in the tube;

[0075] S10. As groundwater enters the filter tube 2 through osmosis and participates in the circulation, the concentration of the circulating solution gradually decreases, causing the water level in the reservoir 5 to continue to rise. When the solution level exceeds the water level sensor 9, the water level sensor gives the electric control valve 10 a second feedback signal, and the water level continues to rise until it reaches the solute placement cylinder 7.

[0076] S11, the solute in the tube begins to dissolve and the concentration of the solution increases again;

[0077] Specifically, when the solute in the solute placement cylinder 7 is exhausted, the solute should be replenished in time.

[0078] S12, when the solution concentration exceeds the upper limit of the concentration set by the concentration sensor 8, the concentration sensor 8 gives a signal feedback of one to the electronically controlled valve 10;

[0079] S13, the electronically controlled valve 10 receives signal feedback 1 and signal feedback 2 simultaneously, the valve opens, the solution is discharged from the drain pipe 11, and the solution level drops rapidly. At this time, the solution concentration is at a high level;

[0080] S14. When the water level in the water reservoir 5 is lower than the water level sensor 9, the second signal feedback disappears, the electronically controlled valve 10 is closed, and the circulating solution 6 re-enters the above-mentioned S9 to S13 circulation process at a higher concentration level until the drainage meets the design and construction requirements.

[0081] Further, such as Figures 4 to 8In FIG. 5 , the density of the filling pattern of the circulating solution 6 is used to represent the change in the concentration of the circulating solution 6 during the drainage process. A larger pattern density indicates a higher solution concentration.

[0082] Further, such as Figures 9 and 10 They correspond to the changes in the concentration of the circulating solution during the drainage process and the changes in the water level of the circulating solution in the reservoir. The curves in the figure only represent the general trend of the changes in the corresponding variables, and do not represent the rate of change in the actual drainage process. "SS" on the horizontal axis indicates entering the next round of solution circulation.

[0083] The method of the present invention has a wide range of applications and is more suitable for precipitation and drainage of aquifers with small permeability coefficients such as fine sand, silt soil, and silty clay.

[0084] Considering that the circulating solution 6 may be corrosive, the filter tube 1 and outer tube 2 should be made of materials with a certain degree of corrosion resistance to prevent corrosion of the pipes and damage to the air tightness. The concentration sensor 8, water level sensor 9 and electric control valve 10 should all be well protected against corrosion.

[0085] When the drainage device of the present invention is in use, the pipe openings at both ends of the outer pipe are in a sealed state, which solves the problem of high air tightness requirements for vacuum well pipe dewatering; the filter tube is wrapped with a semipermeable membrane and a protective sponge, which solves the problem of well pipe clogging during the pumping process; the mechanism of actively sucking groundwater through osmosis makes the device suitable for dewatering aquifers with a small permeability coefficient; the components contained in the device are easy to obtain, the technological content is not high, and the cost is low, which solves the problem of huge economic investment in some traditional methods; as mentioned above, the drainage device and drainage method have simple components, are sturdy and durable, have clear principles, are not difficult to operate, and have a wide range of applications, especially for aquifers with a small permeability coefficient, which can greatly improve their dewatering efficiency.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for actively absorbing and draining water by osmosis, comprising a filter tube (1), an outer tube (2), an inner pumping tube (3), a pumping pump (4), a water reservoir (5), a circulating solution (6), a solute placement cylinder (7), a concentration sensor (8), a water level sensor (9), an electric control valve (10), and a drain pipe (11); characterized in that: A circulating solution (6) is stored in the water reservoir (5). The outer tube (2) is connected to the filter tube (1) at its outlet in the precipitation well through a threaded connection. The outlet of the outer tube (2) in the water reservoir (5) is always located below the water level of the circulating solution (6) in the water reservoir (5) during operation of the device. The pumping inner tube (3) is placed in the outer tube (2). One end of the outlet of the pumping inner tube (3) is located in the filter tube (1), and the other end is connected to the pumping pump (4). The solution pumped out by the pumping pump (4) is discharged into the water reservoir. A water level sensor (9) and a plurality of solute placement cylinders (7) are provided on the wall of the water reservoir (5). A concentration sensor (8) is provided at the bottom of the pool. A drain pipe (11) is provided at the bottom of the wall of the water reservoir (5). An electric control valve (10) is provided in the drain pipe (11). The electric control valve (10) is connected to the concentration sensor (8) and the water level sensor (9) respectively.

2. The device for active water absorption and drainage using osmosis according to claim 1, characterized in that: The filter tube (1) has a plurality of water-permeable holes (1-3) evenly arranged on its body. The outer surface of the tube is covered with a semipermeable membrane (1-2), and then with a protective sponge (1-4). The outermost layer is securely tied to the protective sponge (1-4) and the semipermeable membrane (1-2) using a tying net (1-1). A conical tube cap (1-5) is provided at the lower end of the filter tube (1).

3. The device for active water absorption and drainage using osmosis according to claim 2, characterized in that: The semipermeable membrane (1-2) is made of RO membrane, and the binding net (1-1) is made of water-permeable fabric material.

4. The device for active water absorption and drainage using osmosis according to claim 1, characterized in that: The outer tube (2) is formed by connecting a plurality of straight tubes (2-1) and a plurality of angle tubes (2-2) through threads.

5. The device for active water absorption and drainage using osmosis according to claim 1, characterized in that: The inner water-pumping pipe (3) is a hose with a diameter smaller than the inner diameter of the outer pipe (2); the water-pumping pump (4) can be a self-priming pump or a submersible pump.

6. The device for active water absorption and drainage using osmosis according to claim 1, characterized in that: The position of the solute placing tube (7) must be higher than the water level sensor (9), and the body of the solute placing tube (7) is made of a fine plastic mesh or a water-permeable braid.

7. The device for active water absorption and drainage using osmosis according to claim 1, characterized in that: The water level sensor (9) must be located lower than the solute placement tube (7) and higher than the outlet of the outer tube (2) in the water reservoir.

8. A drainage method using the device for active water absorption and drainage by osmosis according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Form a dewatering well to the designed depth by punching or drilling technology; S2, connecting a plurality of straight tubes (2-1) to an outer tube (2) of appropriate length and size through threads, and connecting the outer tube (2) to a filter tube (1) of appropriate length and size through threads; S3, inserting the filter tube (1) and the outer tube (2) into the precipitation well to the designed depth; S4, select a plurality of straight pipes (2-1) and a plurality of angle pipes (2-2) and connect them by threading to extend the outer pipe (2) to the other end of the pipe mouth located at a certain depth in the water reservoir (5); S5, continuously inserting the inner pumping pipe (3) from the end of the outer pipe (2) of the water reservoir (5) until it is inserted into the filter tube (1); S6. Connect the inner pumping pipe (3) to the pump (4); the solution pumped out by the pump (4) is discharged into the water reservoir; S7, pouring the circulating solution (6) into the water reservoir (5), requiring that the initial water level must not reach the solute placement tube (7) and must not be lower than the pipe opening at the pool end of the outer pipe (2), that is, the circulating solution (6) forms a water seal with the pipe opening at the pool end of the outer pipe (2); S8, start the water pump (4). Since both ends of the outer tube (2) are in a sealed state, the circulating solution (6) is sucked into the outer tube (2) through the annular channel between the inner water pumping tube (3) and the nozzle at the tank end of the outer tube (2) under the action of the water pump (4) and atmospheric pressure, and is finally drawn out from the inner water pumping tube (3) in the filter tube (1), and is discharged into the water reservoir (5) again through the water pump (4), forming a circulation of the circulating solution (6) in the drainage device; S9. During the circulation of the circulating solution (6), since the concentration of the circulating solution in the filter tube (1) is much higher than the concentration of the groundwater outside the filter tube (1), the groundwater outside the filter tube (1) penetrates through the semipermeable membrane (1-2) wrapped around the filter tube (1) through the water permeable holes (1-3) under the action of osmosis and enters the filter tube (1), and joins the circulating solution in the tube; S10. As groundwater enters the filter tube (1) through osmosis and participates in the circulation, the concentration of the circulating solution gradually decreases, and at the same time, the water level of the solution in the reservoir (5) continues to rise. When the solution level exceeds the water level sensor (9), the water level sensor gives the electric control valve (10) a second signal feedback, and the water level continues to rise and reaches the solute placement cylinder (7); S11, the solute in the solute placement tube (7) begins to dissolve, and the solution concentration increases again; S12, when the concentration of the solution exceeds the upper concentration limit set by the concentration sensor (8), the concentration sensor (8) gives a signal feedback of one to the electric control valve (10); S13, the electric control valve (10) receives the signal feedback 1 and the signal feedback 2 at the same time, the valve opens, the solution is discharged from the drain pipe (11), and the solution level drops rapidly. At this time, the solution concentration is at a high level; S14. When the water level of the solution in the water reservoir (5) is lower than the water level sensor (9), the second signal feedback disappears, the electric control valve (10) is closed, and the circulating solution (6) re-enters the above-mentioned S9 to S13 circulation process at a higher concentration level until the drainage meets the design and construction requirements.

9. The drainage method of the device for active water absorption and drainage using osmosis according to claim 8, characterized in that: In step S8, when the water pump (4) is turned on, the initial water level in the pool will drop slightly. When the water pump (4) pumps the solution out and discharges it into the water reservoir (5), the water level reaches its lowest point, which should be higher than the outlet of the outer pipe (2) at the pool end.

10. The drainage method of the device for active water absorption and drainage using osmosis according to claim 8, characterized in that: The filter tube (1) and the outer tube (2) are made of corrosion-resistant materials, and the concentration sensor (8), the water level sensor (9) and the electric control valve (10) are all provided with corrosion protection.

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