Circulating washing device for saline-alkali soil remediation and remediation method thereof

Abstract

The application provides a circulating flushing equipment for saline-alkali soil remediation and a remediation method thereof. The circulating flushing equipment for saline-alkali soil remediation comprises a communication pipe, a water collecting pipe, a water collecting pipe, a drain pipe, a water pumping vehicle, a water guide groove and a water return cylinder assembly. The water collecting pipe and the drain pipe are provided with the water collecting pipe, and the water return cylinder assembly is placed in the water collecting pipe by using a lifting mechanism. The water return cylinder assembly detects the water return while preventing the water return from being discharged into the drain pipe. The water return cylinder assembly pumps the water return meeting the recycling standard back into the water guide groove for flushing the field again, realizes efficient recycling of water resources, effectively improves the water resource utilization rate, and detects the water return at all times to determine whether the field is completely cleaned. The problems of excessive flushing and insufficient flushing are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of contaminated soil regeneration, in particular, to a circulating flushing equipment for saline-alkali soil remediation and a remediation method thereof. BACKGROUND

[0002] Saline-alkali soil is a kind of land affected by natural and human factors, resulting in salt accumulation and poor properties. It not only directly restricts agricultural production, but also threatens the ecological environment. Saline-alkali soil flushing is a traditional and important water conservancy measure for treating saline-alkali soil, which transforms high-salt, high-alkali, and unsuitable land for crop growth into fertile soil that can support the growth of healthy crops through human intervention.

[0003] Water irrigation and salt washing is a traditional and important water conservancy measure for treating saline-alkali soil. Its core principle is to dissolve and leach excessive soluble salt in the surface layer of soil and the root layer of crops to deep soil by irrigating a large amount of water, or to drain the soil through a drainage system. The drainage system specifically includes a buried underground pipe that collects and drains the leached salt-containing water through the pipe to avoid secondary salinization.

[0004] The existing Chinese patent with publication number CN109417875A discloses a buried pipe salt washing device and method. The device includes: a T-shaped tee, a buried pipe connected to the side port of the T-shaped tee, a water outlet pipe connected to the lower port of the T-shaped tee, a transparent vertical pipe connected to the upper port of the T-shaped tee, and a sealing piece for sealing the water outlet pipe or the upper port of the T-shaped tee. The device is used for washing salt in saline-alkali soil. The transparent vertical pipe is used to monitor and control the water level in the saline-alkali soil. The sealing piece is used to control the time of soaking the saline-alkali soil in irrigation water.

[0005] In view of the above related technology, water irrigation and salt washing requires a large amount of fresh water to be injected into the field for flushing the saline-alkali soil. However, in the case of different salt content in different parts of the field, it is difficult to accurately control the amount of water and time required for flushing. The drainage collected in the buried pipe may not reach the saturation state, which may cause waste of water resources or incomplete flushing. Moreover, the traditional method lacks real-time monitoring and recycling mechanism for the drainage after salt washing, resulting in low treatment efficiency.

[0006] In summary, the existing salt washing technology for saline-alkali soil remediation still has the problems of low water resource utilization rate, lack of precise control in the flushing process, and ineffective recycling of drainage. SUMMARY

[0007] In view of the defects in the prior art, the purpose of the present application is to provide a circulating flushing equipment for saline-alkali soil remediation and a remediation method thereof.

[0008] The application provides a circulating flushing device for saline-alkali soil remediation, which comprises a communication pipe, a water collecting pipe, a water collecting pipe, a drain pipe, a water pumping vehicle, a water guide groove and a water return cylinder assembly.

[0009] The water collecting pipe and the drain pipe are installed on two sides of the water collecting pipe, the communication pipe extends vertically from the surface of the field to the water collecting pipe in the field, and the water collecting pipe is installed directly below the water guide groove dug in the field.

[0010] The water pumping vehicle is used for pumping saline-alkali soil remediation water to the water guide groove, the water pumping vehicle is provided with a lifting mechanism, the lifting mechanism is connected with the water return cylinder assembly, and the lifting mechanism is used for driving the water return cylinder assembly to move vertically in the communication pipe.

[0011] The outer wall of the water return cylinder assembly is attached to the inner wall of the communication pipe, and the water return cylinder assembly is used for sending water returned from the water collecting pipe to the water guide groove.

[0012] Preferably, the water return cylinder assembly comprises a water return cylinder, a partition plate, a submersible pump, a first interface and a detection head.

[0013] The side wall of the water return cylinder is provided with a water inlet;

[0014] The submersible pump is arranged in the water return cylinder and located close to the water inlet;

[0015] The detection head is arranged on one side of the submersible pump;

[0016] The partition plate is arranged in the water return cylinder, and the partition plate separates the water inlet, the submersible pump and the detection head into a space;

[0017] The first interface is arranged at the water outlet end of the submersible pump, and the first interface penetrates the partition plate upwardly;

[0018] When the detection head detects that the water return meets the recycling standard, the submersible pump pumps the water return to the water guide groove;

[0019] When the detection head detects that the water return does not meet the recycling standard, the lifting mechanism drives the water return cylinder assembly to move upwardly in the communication pipe, and the water return is discharged to the drain pipe;

[0020] When the detection head detects that the water return meets the recycling standard within a set time, the lifting mechanism drives the water return cylinder assembly to move upwardly in the communication pipe until the water return cylinder assembly leaves the communication pipe, and the water return is discharged to the drain pipe.

[0021] Preferably, the water return cylinder assembly further comprises a telescopic column, a support plate and a positioning frame.

[0022] The central axis of the telescopic column is parallel to the central axis of the water return cylinder and does not coincide with the central axis of the water return cylinder.

[0023] The telescopic column comprises a fixed part and a telescopic part, the fixed part is fixedly installed on the water return cylinder, and the telescopic part is slidingly connected to the fixed part.

[0024] The support plate is fixed on the fixed part of the telescopic column, the top end support point of the support plate is in the same straight line with the axis of the water return cylinder, and the support plate is used for supporting the positioning frame.

[0025] The top end of the telescopic part of the telescopic column is fixedly connected with a top block, and the top block is slidingly connected to the positioning frame.

[0026] When the telescopic part of the telescopic column is not elongated, the positioning frame remains parallel, and the positioning frame is not in contact with the inner wall of the communication pipe; when the telescopic part of the telescopic column is elongated, the positioning frame is inclined, and the positioning frame is in contact with the inner wall of the communication pipe.

[0027] Preferably, the positioning frame comprises a first positioning strip and two second positioning strips with a common point, and the point is in the same straight line with the axis of the water return cylinder.

[0028] The top block fixedly connected to the top end of the telescopic column is slidingly connected to the first positioning strip,

[0029] The end of the first positioning strip extends downward with a first extension, and the end of the second positioning strip extends upward with a second extension.

[0030] The ends of the first extension and the second extension are respectively connected with friction columns.

[0031] Preferably, the two sides of the first positioning strip are provided with moving grooves parallel to the top surface and the bottom surface of the first positioning strip,

[0032] The top block is fixedly connected with a sliding column in the moving groove, and the sliding column can slide in the moving groove.

[0033] Preferably, the communication pipe is provided with two openings along the axis of the converging pipe, one opening is in communication with the water collecting pipe, and the other opening is in communication with the drain pipe.

[0034] When the water return cylinder assembly moves to the bottom end of the communication pipe, the top end of the water return cylinder in the water return cylinder assembly is higher than the opening, and the top end of the water return cylinder is provided with a sealing ring.

[0035] An enclosing plate is fixedly connected between the outer wall of the communication pipe and the inner wall of the converging pipe.

[0036] Preferably, the communication pipe is provided with a sand outlet near the bottom end of the water outlet, and the bottom end of the sand outlet is flush with the bottom surface of the backwater cylinder.

[0037] Preferably, the lifting mechanism comprises a cable and a winding disc.

[0038] The winding disc is installed at the top end of the tail of the pump cart.

[0039] One end of the cable is connected to the backwater cylinder assembly, and the other end is connected to the winding disc.

[0040] The winding disc is used to wind or unwind the cable.

[0041] Preferably, hollow insertion pipes are arranged in the water guide groove along the length direction and inserted into the ground, and the insertion pipes are provided with water permeable openings along their own axes.

[0042] According to the present application, a circulating flushing method for saline-alkali soil remediation is provided, which uses the above-mentioned circulating flushing equipment for saline-alkali soil remediation.

[0043] The communication pipe, the water collecting pipe, the flow collecting pipe, and the drainage pipe are buried in the field, the water collecting pipe and the drainage pipe are installed on both sides of the flow collecting pipe, one end of the communication pipe is connected to the flow collecting pipe, and the other end extends out of the field.

[0044] The pump cart moves to the position near the end of the communication pipe extending out of the field, and the lifting mechanism puts the backwater cylinder assembly into the bottom of the communication pipe along the axis of the communication pipe.

[0045] A water guide groove is dug on the surface of the field directly above the water collecting pipe along the length direction of the water collecting pipe, the pump cart pumps saline-alkali soil remediation water into the water guide groove, the saline-alkali soil remediation water in the water guide groove infiltrates into the field, the field is washed, and the backwater after washing the field enters the water collecting pipe.

[0046] The backwater collected by the water collecting pipe flows to the flow collecting pipe, and the backwater cylinder assembly detects whether the backwater meets the reuse standard.

[0047] If the backwater meets the reuse standard, the backwater cylinder assembly pumps the backwater to the water guide groove for reuse, and the backwater circulation washes the field.

[0048] If the backwater does not meet the reuse standard, the lifting mechanism lifts the backwater cylinder assembly in the communication pipe, so that the backwater is discharged into the drainage pipe.

[0049] When the backwater cylinder assembly detects that the backwater meets the recycling standard for a set period of time, it is determined that the field block in the area is cleaned by circulation, the pump water vehicle stops pumping saline-alkali soil repair water, and the lifting mechanism retracts the backwater cylinder assembly in the communication pipe.

[0050] Compared with the prior art, the present application has the following beneficial effects:

[0051] The present application sets a collecting pipe between the water collecting pipe and the drainage pipe, and uses a lifting mechanism to put the backwater cylinder assembly into the collecting pipe. The backwater cylinder assembly detects the backwater while preventing it from being discharged into the drainage pipe, and detects whether the backwater meets the recycling standard. The backwater cylinder assembly pumps backwater that meets the recycling standard back into the water guide groove to flush the field block again, realizing efficient recycling of water resources and effectively improving the utilization rate of water resources. The backwater cylinder assembly detects the backwater at all times to determine whether the field block is cleaned by circulation, avoiding the problems of excessive flushing and insufficient flushing. BRIEF DESCRIPTION OF DRAWINGS

[0052] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, read in conjunction with the accompanying drawings:

[0053] Figure 1 The present application mainly embodies a schematic diagram of circulating flushing of a field block;

[0054] Figure 2 The present application mainly embodies a schematic diagram of the buried state of the pipeline in the field block;

[0055] Figure 3 The present application mainly embodies Figure 2 An enlarged view of A in the present application;

[0056] Figure 4 The present application mainly embodies a connecting state perspective view of the collecting pipe, the communication pipe and the water collecting pipe;

[0057] Figure 5 The present application mainly embodies a perspective view of the internal structure of the collecting pipe and the communication pipe;

[0058] Figure 6 The present application mainly embodies Figure 5 An enlarged view of B in the present application;

[0059] Figure 7 The present application mainly embodies a perspective view of the collecting pipe and the communication pipe;

[0060] Figure 8 The present application mainly embodies a perspective view of the collecting pipe and the communication pipe from another angle;

[0061] Figure 9This is a perspective view showing the contact state between the positioning frame and the inner wall of the connecting pipe, which is the main feature of this invention.

[0062] Figure 10 This invention is mainly embodied in Figure 9 Enlarged view of C;

[0063] Figure 11 This is a front view showing the contact state between the positioning frame and the inner wall of the connecting pipe, which is the main feature of this invention.

[0064] Figure 12 This invention primarily illustrates a three-dimensional view of the return water cylinder when the positioning frame is in a horizontal state;

[0065] Figure 13 This invention primarily demonstrates a three-dimensional view of the return water cylinder when the positioning frame is in a horizontal state from another perspective.

[0066] The diagram shows: 1. Return water cylinder; 101. Inlet; 102. Sealing ring; 2. Partition plate; 3. Submersible pump; 4. First interface; 5. Detection head; 6. Telescopic column; 601. Top block; 7. Support plate; 8. Positioning frame; 801. First extension; 802. Second extension; 803. Friction column; 804. Moving groove; 9. Cable; 10. Manifold; 1001. Sealing plate; 11. Connecting pipe; 1101. Through port; 1102. Sand discharge port; 12. Water collection pipe; 13. Drainage pipe; 14. Pump truck; 15. Reel; 16. Second interface; 17. Third interface; 18. Field; 19. Water guide channel; 20. Insertion pipe; 21. Cover. Detailed Implementation

[0067] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0068] like Figures 1 to 3 As shown, a circulating flushing device for saline-alkali land remediation according to the present invention includes: a connecting pipe 11, a water collection pipe 12, a manifold pipe 10, a drain pipe 13, a water pump 14, a water guide trough 19, and a return water cylinder assembly.

[0069] The water collection pipe 12, the manifold pipe 10, and the drain pipe 13 form a concealed drainage pipe. The manifold pipe 10 and the drain pipe 13 are connected by a flange. The water collection pipe 12 is inserted into the manifold pipe 10 for connection. The water collection pipe 12, the manifold pipe 10, and the drain pipe 13 are buried in the field 18. The water collection pipe 12 and the drain pipe 13 are installed on both sides of the manifold pipe 10. Specifically, as shown... Figure 4 as well as Figure 5As shown, the water collecting pipe 12 comprises three water collecting pipe branches arranged in parallel and equidistant. The communication pipe 11 extends vertically from the surface of the field plot 18 to the field plot 18 and is connected with the collecting pipe 10. The water collecting pipe 12 is arranged directly below the water guide groove 19 dug on the field plot 18. The water collecting pipe 12 is opposite to the lower part of the water guide groove 19. The saline-alkali water flows through the field plot 18 from the water guide groove 19 and then flows back to the water collecting pipe 12 for collection. The end of the water collecting pipe 12 close to the collecting pipe 10 is lower than the other end. The water entering the water collecting pipe 12 can flow faster to the collecting pipe 10 under the action of gravity.

[0070] As shown in the drawings, Figure 1 In an embodiment, the communication pipe 11 is capped with a cap 21 when not in use. The cap 21 prevents sundries from falling into the communication pipe 11. In an embodiment, the end of the drain pipe 13 is connected with a water storage pool. The saline-alkali water in the water storage pool is pumped out regularly and transported for treatment, preventing the saline-alkali water from being directly discharged and polluting the land in other areas.

[0071] The carriage of the water pumping vehicle 14 is used to contain the saline-alkali water. The water pumping vehicle 14 is used to pump the saline-alkali water to the water guide groove 19. The water pumping vehicle 14 is provided with a lifting mechanism connected with the water return cylinder assembly. The lifting mechanism is used to drive the water return cylinder assembly to move vertically in the communication pipe 11.

[0072] In an embodiment, the tail end of the water pumping vehicle 14 is welded with a bracket for fixing the water return cylinder assembly. When the water pumping vehicle 14 moves with the water return cylinder assembly, the bracket keeps the water return cylinder assembly stable.

[0073] The lifting mechanism and the water return cylinder assembly are integrated devices. When the field plot 18 in an area is washed, the water pumping vehicle 14 moves to the field plot 18 in the next area with the lifting mechanism and the water return cylinder assembly, and the field plot 18 in the next area is washed in a cycle.

[0074] The outer wall of the water return cylinder assembly is attached to the inner wall of the communication pipe 11. The water return cylinder assembly is used to send the water returned from the water collecting pipe 12 to the water guide groove 19. When the water returned meets the recycling standard, the lifting mechanism places the water return cylinder assembly at the bottom end of the collecting pipe 10. The water return cylinder assembly prevents the water returned from being discharged into the drain pipe 13. The water return cylinder assembly sends the water returned from the water collecting pipe 12 to the water guide groove 19. When the water returned does not meet the recycling standard, the lifting mechanism lifts the water return cylinder assembly in the communication pipe 11. The water returned is discharged into the drain pipe 13. When the water returned meets the recycling standard for a set time, the lifting mechanism lifts the water return cylinder assembly in the communication pipe 11 to leave the communication pipe 11. The washing of the field plot 18 is completed. The water pumping vehicle 14 moves to the next field plot 18 with the water return cylinder assembly, and the next field plot 18 is washed.

[0075] The communication pipe 11, the collecting pipe 12, the collecting pipe 10, the drainage pipe 13 are buried in the field 18, the collecting pipe 12 and the drainage pipe 13 are installed on both sides of the collecting pipe 10, one end of the communication pipe 11 is connected with the collecting pipe 10, and the other end extends out of the ground.

[0076] The pump water vehicle 14 moves to the position near the position where the communication pipe 11 extends out of the ground, and the lifting mechanism puts the backwater cylinder assembly along the axis of the communication pipe 11 into the bottom of the communication pipe 11.

[0077] The water guide groove 19 is dug on the surface of the field 18 directly above the collecting pipe 12 along the length direction of the collecting pipe 12, the pump water vehicle 14 pumps the saline-alkali soil repairing water into the water guide groove 19, the saline-alkali soil repairing water in the water guide groove 19 infiltrates into the field 18, the field 18 is washed, and the backwater after washing the field 18 enters the collecting pipe 12.

[0078] The backwater collected by the collecting pipe 12 flows to the collecting pipe 10, the backwater cylinder assembly detects whether the backwater meets the recycling standard, if the backwater meets the recycling standard, the backwater cylinder assembly pumps the backwater to the water guide groove 19 for recycling, and the backwater circulation washes the field 18. If the backwater does not meet the recycling standard, the lifting mechanism lifts the backwater cylinder assembly in the communication pipe 11, so that the backwater enters the drainage pipe 13.

[0079] When the backwater cylinder assembly detects that the backwater always meets the recycling standard in a set time period, it is judged that the field 18 in the region is washed circularly, the pump water vehicle 14 stops pumping the saline-alkali soil repairing water, the lifting mechanism withdraws the backwater cylinder assembly in the communication pipe 11, and moves to the communication pipe 11 of the field 18 where the communication pipe 11, the collecting pipe 12, the collecting pipe 10 and the drainage pipe 13 are buried, to circularly wash the field 18 corresponding to the communication pipe 11.

[0080] The application sets the collecting pipe 10 between the collecting pipe 12 and the drainage pipe 13, and uses the lifting mechanism to put the backwater cylinder assembly into the collecting pipe 10, the backwater cylinder assembly detects the backwater while preventing the backwater from flowing into the drainage pipe 13, detects whether the backwater meets the recycling standard, and pumps the backwater meeting the recycling standard back to the water guide groove 19 to wash the field again, realizes efficient recycling of water resources, effectively improves the water resource utilization rate, the backwater cylinder assembly always detects the backwater to judge whether the field 18 is circularly washed, and the problems of excessive washing and insufficient washing are avoided.

[0081] As shown in the accompanying drawings, Figure 12 In some possible embodiments, the backwater cylinder assembly includes a backwater cylinder 1, a partition plate 2, a submersible pump 3, a first interface 4 and a detection head 5.

[0082] The outer diameter of the backwater cylinder 1 is the same as the inner diameter of the communication pipe 11, and the backwater cylinder 1 is provided with a water inlet 101 on the side wall; the submersible pump 3 is arranged in the backwater cylinder 1 close to the water inlet 101; the detection head 5 is installed on one side of the submersible pump 3; the partition plate 2 is arranged in the backwater cylinder 1, and the partition plate 2 separates the water inlet 101, the submersible pump 3 and the detection head 5 into a space; because the partition plate 2 separates the water inlet 101, the submersible pump 3 and the detection head 5 into a space, backwater only enters this area of the backwater cylinder 1, and does not enter other areas of the backwater cylinder 1, thereby avoiding the influence of backwater on the components arranged in other areas of the backwater cylinder 1. The first interface 4 is arranged at the water outlet end of the submersible pump 3, and the first interface 4 passes through the partition plate 2 upwards, so that the water inlet 101, the submersible pump 3 and the detection head 5 are separated into a space, and then the backwater can be pumped outwards through the partition plate 2.

[0083] Specifically, the tail of the water pumping vehicle 14 is provided with a second interface 16 and a third interface 17, a water pump is arranged in the water pumping vehicle 14, the water inlet end of the water pump is communicated with the water tank of the water pumping vehicle 14, the water outlet end of the water pump is connected with the third interface 17, the hose connected with the third interface is used for guiding water into the water guide groove 19, and the second interface 16 is connected with the first interface 4 through the hose, so that the backwater pumped by the submersible pump 3 can be transported into the water tank of the water pumping vehicle 14 through the hose, thereby realizing the reuse of water resources. In a feasible implementation manner, the backwater pumped by the submersible pump 3 can also be directly discharged into the water guide groove 19, thereby preventing the salt content in the water storage tank of the water pumping vehicle 14 from rising.

[0084] When the detection head 5 detects that the backwater meets the reuse standard, the submersible pump 3 pumps the backwater to the water guide groove 19; when the detection head 5 detects that the backwater does not meet the reuse standard, the lifting mechanism drives the backwater cylinder assembly to move upwards in the communication pipe 11, and the backwater is discharged to the drain pipe 13; when the detection head 5 detects that the backwater meets the reuse standard within a set time, the lifting mechanism drives the backwater cylinder assembly to move upwards in the communication pipe 11 until the backwater cylinder assembly leaves the communication pipe 11, and the backwater is discharged to the drain pipe 13. Specifically, the detection head 5 is an electric conductivity sensor, the detection head 5 detects whether the backwater meets the utilization standard by detecting the salt concentration in the backwater,

[0085] The backwater is collected by the collecting pipe 12 and flows to the collecting pipe 10. The backwater cylinder 1 prevents the backwater from flowing into the drain pipe 13. The backwater enters the backwater cylinder 1 through the water inlet 101, and the detection head 5 detects the backwater. When the detection head 5 detects that the backwater meets the recycling standard, the backwater in the backwater cylinder 1 enters through the water inlet 101 and is pumped by the submersible pump 3. The backwater is sent from the first interface 4 to the water guide groove 19. When the detection head 5 detects that the backwater does not meet the recycling standard, the lifting mechanism drives the backwater cylinder assembly to move upward in the communicating pipe 11, and the backwater is discharged to the drain pipe 13. When the detection head 5 detects that the backwater meets the recycling standard within a set time, the lifting mechanism drives the backwater cylinder assembly to move upward in the communicating pipe 11 until it leaves the communicating pipe 11, and the backwater is discharged to the drain pipe 13.

[0086] As shown in some possible embodiments, the backwater cylinder assembly further comprises a telescopic column 6, a support plate 7, and a positioning frame 8. Figure 6

[0087] The central axis of the telescopic column 6 is parallel to the central axis of the backwater cylinder 1 and does not coincide with the central axis of the backwater cylinder 1. The telescopic column 6 comprises a fixed part and a telescopic part. The fixed part is fixedly installed on the backwater cylinder 1, and the telescopic part is slidingly connected to the fixed part. Specifically, the telescopic column 6 adopts an electric push rod. The support plate 7 is fixed on the fixed part of the telescopic column 6. The top end support point of the support plate 7 is in the same straight line as the axis of the backwater cylinder 1. The support plate 7 is used to support the positioning frame 8. The top end of the telescopic part of the telescopic column 6 is fixedly connected with a top block 601, and the top block 601 is slidingly connected to the positioning frame 8.

[0088] When the telescopic part of the telescopic column 6 is not elongated, the top end support point of the support plate 7 is in the same straight line as the axis of the backwater cylinder 1. The top end support point of the support plate 7 is in contact with the top of the positioning frame 8, supporting the positioning frame 8. The positioning frame 8 remains parallel and does not contact the inner wall of the communicating pipe 11. When the telescopic part of the telescopic column 6 is elongated, the telescopic column 6 is not located at the central axis of the backwater cylinder 1. When the bottom of the positioning frame 8 is only in contact with the telescopic column 6, the positioning frame 8 is inclined under the action of its own gravity and is in contact with the inner wall of the communicating pipe 11.

[0089] ​The lifting mechanism puts the backwater cylinder assembly into the communicating pipe 11, and the backwater cylinder assembly slowly descends by its own gravity. The top end support point of the support plate 7 is in contact with the top of the positioning frame 8 to support the positioning frame 8, and the positioning frame 8 remains parallel and does not completely contact the inner wall of the communicating pipe 11. When the friction between the sealing ring 102 on the backwater cylinder 1 and the inner wall of the communicating pipe 11 gradually increases, the extension part of the telescopic column 6 is extended to lift the positioning frame 8, so that the positioning frame 8 is separated from the contact with the support plate 7. The positioning frame 8 is tilted by its own gravity, and the edge of the positioning frame 8 is in contact with the inner wall of the communicating pipe 11. As the extension part of the telescopic column 6 continues to extend, the extension part of the telescopic column 6 further tilts the positioning frame 8, so that the edge of the positioning frame 8 is further compressed, and the friction between the positioning frame 8 and the inner wall of the communicating pipe 11 is sufficient, so that the height of the positioning frame 8 in the communicating pipe 11 is fixed. As the extension part of the telescopic column 6 continues to extend, the backwater cylinder 1 can be easily pushed down. The extension part of the telescopic column 6 reciprocally extends and retracts to stably push the backwater cylinder 1 to the bottom end of the communicating pipe 11.

[0090] When the backwater cylinder 1 cannot continue to slide downward by its own gravity, the telescopic column 6 can provide a downward pushing force for the backwater cylinder 1, and will not affect the normal upward movement of the backwater cylinder 1 when the telescopic column 6 is retracted, so as to ensure that the backwater cylinder 1 can be smoothly lowered to the bottom of the communicating pipe 11, and can be steadily raised by the lifting mechanism when it is necessary to release backwater to the drain pipe 13.

[0091] As shown in Figures 6 to 13 In some possible embodiments, the positioning frame 8 includes a first positioning strip and two second positioning strips sharing a common point, and the common point is in the same straight line as the axis of the backwater cylinder 1. The positioning frame 8 has a Y-shaped structure as a whole.

[0092] The top block 601 fixedly connected to the top end of the telescopic column 6 is slidingly connected to the first positioning strip.

[0093] The end of the first positioning strip extends downward to have a first extension part 801, and the end of the second positioning strip extends upward to have a second extension part 802.

[0094] The ends of the first extension part 801 and the second extension part 802 are respectively connected to a friction column 803. When the positioning frame 8 is in a horizontal state, the friction column 803 does not simultaneously contact the inner wall of the communicating pipe 11.

[0095] Specifically, the friction column 803 is made of rubber material, and the rubber material friction column 803 is stably connected to the ends of the first extension part 801 and the second extension part 802 by bonding or clamping.

[0096] The lifting mechanism puts the water return cylinder assembly into the communicating pipe 11, and the water return cylinder assembly slowly descends under its own gravity. The top end support point of the support plate 7 is in contact with the midpoint of the first positioning strip and the two second positioning strips, supporting the positioning frame 8, which remains parallel. The friction columns 803 are not in contact with the inner wall of the communicating pipe 11 at the same time. When the friction force between the sealing ring 102 on the water return cylinder 1 and the inner wall of the communicating pipe 11 gradually increases, the water return cylinder assembly cannot continue to slide downward under its own gravity. The extension part of the telescopic column 6 is elongated, lifting the positioning frame 8 and causing the positioning frame 8 to tilt under the action of its own gravity. The friction columns 803 at the ends of the first extension part 801 and the second extension part 802 are in contact with the inner wall of the communicating pipe 11 at the same time. As the extension part of the telescopic column 6 continues to elongate, the first positioning strip is further tilted upward and the second positioning strip is further tilted downward, causing the friction columns 803 at the ends of the first extension part 801 and the second extension part 802 to be further compressed. This further increases the deformation amount of the friction columns 803, increases the contact area between the friction columns 803 and the inner wall of the communicating pipe 11, and increases the force on the friction columns 803 when in contact. The friction force between the positioning frame 8 and the inner wall of the communicating pipe 11 is sufficient, so that the height of the positioning frame 8 in the communicating pipe 11 is fixed. As the extension part of the telescopic column 6 continues to elongate, the water return cylinder 1 can be easily pushed downward. The extension part of the telescopic column 6 reciprocally elongates and contracts to stably push the water return cylinder 1 to the bottom end of the communicating pipe 11.

[0097] As shown in Figure 10 some possible embodiments, the first positioning strip is provided with a moving groove 804 on both sides parallel to the top surface and the bottom surface of the first positioning strip. The top block 601 is fixedly connected with a sliding column located in the moving groove 804, and the sliding column can slide in the moving groove 804.

[0098] Specifically, the top block 601 includes a bottom plate and two side plates. The bottom surface of the bottom plate is fixedly connected with the top end of the telescopic column 6. The diameter of the sliding column is the same as the height of the moving groove 804. The two side plates are respectively fixedly connected with one end of the sliding column, and the other end of the sliding column slides in the moving groove 804.

[0099] The sliding column slides in the moving groove 804 to support the positioning frame 8 at different positions, thereby further tilting the positioning frame 8.

[0100] As shown in Figure 7 and Figure 8 some possible embodiments, the communicating pipe 11 is inserted into the collector pipe 10. One end of the communicating pipe 11 is in contact with the bottom surface of the collector pipe 10, and the other end extends out of the field 18.

[0101] The communication pipe 11 is provided with two openings 1101 along the axial direction of the collecting pipe; one opening 1101 is communicated with the collecting pipe 12, and the other opening 1101 is communicated with the drain pipe 13.

[0102] When the backwater cylinder assembly moves to the bottom end of the communication pipe 11, the top end of the backwater cylinder 1 in the backwater cylinder assembly is higher than the opening 1101, and the top end of the backwater cylinder 1 is provided with a sealing ring 102; the top end of the backwater cylinder 1 is higher than the opening 1101, the water inlet 101 on the backwater cylinder 1 is communicated with the opening 1101, and the sealing ring 102 is in close contact with the inner wall of the communication pipe 11, so as to prevent the drain from flowing into the other side of the baffle 2 in the backwater cylinder 1, thereby avoiding the damage of the telescopic column 6 and other components caused by water.

[0103] The outer wall of the communication pipe 11 is fixedly connected with the inner wall of the collecting pipe 10 through a sealing plate 1001, which is used to prevent the drain from flowing out from the gap between the inner wall of the collecting pipe 10 and the outer wall of the communication pipe 11, so that the backwater can be pumped back to the water guide groove 19 by the backwater cylinder assembly as much as possible after detection.

[0104] As shown in Figure 7 and Figure 8 In some possible embodiments, the communication pipe 11 is provided with a sand outlet 1102 at the bottom end of the opening 1101 close to the drain pipe 13, and the bottom end of the sand outlet 1102 is flush with the bottom surface of the backwater cylinder 1. When the backwater cylinder 1 rises, small particles or silt in the drain are not effectively blocked under the action of water flow, and the small particles or silt can follow the drain to leave the communication pipe 11 through the sand outlet 1102, so that the small particles or silt can be prevented from accumulating at the bottom end of the communication pipe 11, and the bottom surface of the backwater cylinder 1 cannot be in contact with the bottom end of the communication pipe 11, causing the opening 1101 and the water inlet 101 to not correspond completely.

[0105] As shown in Figure 3 In some possible embodiments, the lifting mechanism includes a cable 9 and a winding disc 15; the winding disc 15 is installed at the top end of the tail of the water pumping vehicle 14; one end of the cable 9 is connected with the backwater cylinder assembly, and the other end of the cable 9 is connected with the winding disc 15; the winding disc 15 is used to wind or release the cable 9.

[0106] Specifically, the top end of the backwater cylinder 1 is provided with four hanging ears for connecting the cable, and the tail of the water pumping vehicle 14 is provided with the winding disc 15 for winding or releasing the cable. The winding of the cable 9 by the winding disc 15 realizes the lifting of the height of the backwater cylinder 1, and the release of the cable 9 by the winding disc 15 realizes the placement of the backwater cylinder 1 into the communication pipe 11.

[0107] In a feasible embodiment, during the movement of the telescopic column 6 pushing the water cylinder 1 downwards, the winding disc 15 continuously rotates to release the cable 9, preventing the cable 9 from being broken or stuck due to excessive tension, and when the telescopic column 6 is retracted, the positioning frame 8 is also in an inclined state, but the force of the contact between the friction column 803 and the inner wall of the communication pipe 11 is smaller, which does not affect the retraction of the telescopic column 6.

[0108] As shown in Figure 2 In some feasible embodiments, hollow insertion pipes 20 are arranged in the water guide channel 19 along the length direction and inserted into the ground, and the insertion pipes 20 are arranged with water permeable openings along the axis of the insertion pipes 20, and the outer wall of the insertion pipes 20 is wrapped with a water permeable coating layer for preventing soil from entering the pipe. The insertion pipes 20 enable the saline-alkali soil remediation water in the water guide channel 19 to be quickly infiltrated. The water permeable openings arranged on the side wall of the insertion pipes 20 uniformly and quickly infiltrate water to different depths of the soil layer, effectively improving the infiltration efficiency of the saline-alkali soil remediation water, and enabling the saline-alkali soil remediation water to quickly flush the field plot 18.

[0109] Specifically, the insertion pipes 20 are inserted into the water guide channel 19 along the vertical direction, and the bottom end of each insertion pipe 20 maintains the same safety distance from the water collecting pipe 12, preventing the insertion pipe 20 from inserting and breaking the water collecting pipe 12.

[0110] Specifically, the insertion pipes 20 can also be inserted into the water guide channel 19 in an inclined manner, and the inclined direction of the insertion pipes 20 is the extension direction of the water guide channel 19, and the insertion pipes 20 are inserted into the water guide channel 19 in an inclined manner to further improve the water guide speed to the field plot 18.

[0111] According to the present application, a saline-alkali soil remediation circulating flushing method is provided, which comprises: burying the communication pipe 11, the water collecting pipe 12, the water collecting pipe 10, and the drainage pipe 13 in the field plot 18, the water collecting pipe 12 and the drainage pipe 13 are installed on both sides of the water collecting pipe 10, the communication pipe 11 is kept in a vertical state, one end of the communication pipe 11 is connected to the water collecting pipe 10, and the other end extends out of the ground.

[0112] The pump water cart 14 moves to the position near the extension of the communication pipe 11 out of the ground, after opening the cover 21, the water supply hose is connected to the first interface 4 and the second interface 16, the bottom of the water return cylinder 1 is aligned with the communication pipe 11, and the water inlet 101 is directed to the direction of the opening 1101 near the water collecting pipe 12, the winding disc 15 slowly releases the pull rope, the water return cylinder 1 slowly descends along the axis of the communication pipe 11, when the friction force between the sealing ring 102 and the inner wall of the communication pipe 11 gradually increases, until the water return cylinder 1 cannot slide by its own gravity due to the friction force, the telescopic part of the telescopic column 6 is extended, the positioning frame 8 is lifted, the positioning frame 8 is out of contact with the support plate 7, the positioning frame 8 is tilted under the action of its own gravity, the first extension 801 and the second extension 802 end of the friction column 803 are in contact with the inner wall of the communication pipe 11 at the same time, as the telescopic column 6 continues to extend, the position of the telescopic column 6 on the positioning frame 8 is on the upper side of the inclined positioning frame 8, which further aggravates the inclination of the positioning frame 8, so that the friction column 803 is further compressed, thereby fixing the height of the positioning frame 8 in the communication pipe 11, as the telescopic column 6 continues to extend, the water return cylinder 1 can be easily pushed down, the telescopic column 6 thus reciprocating extension can stably push the water return cylinder 1 to the bottom end of the communication pipe 11, thereby realizing the stable placement of the communication pipe 11;

[0113] A water guide groove 19 is dug on the surface of the field 18 directly above the water collecting pipe 12 along the length direction of the water collecting pipe 12, the inclination direction of the water guide groove 19 is opposite to that of the water collecting pipe 12, the height of the end of the water guide groove 19 near the communication pipe 11 is higher than that of the other end, which facilitates the faster and uniform flow of the saline-alkali soil repair water pumped by the pump water cart 14 into the water guide groove 19.

[0114] The water pump in the pump water cart 14 works to discharge the saline-alkali soil repair water in the water tank into the water guide groove 19 through the hose connected by the third interface 17, the saline-alkali soil repair water enters the water collecting pipe 12 through infiltration, and is affected by the inclined water collecting pipe 12, the water flows into the collecting pipe 10 under the action of gravity, when the water level exceeds the detection head 5, the detection head 5 can judge whether the drainage can be reused this time by measuring the liquid conductivity;

[0115] The water collecting pipe 12 collects the return water flowing into the collecting pipe 10, the detection head 5 detects whether the return water meets the reuse standard, if it meets the reuse standard, the submersible pump 3 starts to pump the return water to the water guide groove 19 for reuse, and the return water circulation washes the field 18. If it does not meet the reuse standard, the winding disc 15 winds the pull rope 9, the water return cylinder assembly is lifted in the communication pipe 11, a channel is left between the bottom surface of the water return cylinder 1 and the inner wall of the communication pipe 11, the drainage that cannot be reused passes through the channel, so that the return water enters the drainage pipe 13.

[0116] When the backwater cylinder assembly detects that the backwater meets the recycling standard all the time within a set time period, it is determined that the area field plot 18 is recycled, the pump water vehicle 14 stops pumping saline soil remediation water, the lifting mechanism retracts the backwater cylinder assembly in the communication pipe 11, and moves to the next field plot 18 with the communication pipe 11, the water collecting pipe 12, the confluence pipe 10, and the drain pipe 13, and performs cycle flushing on the field plot 18 corresponding to the communication pipe 11.

[0117] After the backwater cylinder 1 in the communication pipe 11 is retracted, the next field plot 18 corresponding to the communication pipe 11 can be subjected to cycle flushing, and the target field plot can be subjected to regeneration work uniformly and efficiently.

[0118] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0119] The specific embodiments of the present application are described above. It should be understood that the present application is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the present application. The embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other without conflict.

Claims

1. A circulating flushing device for saline-alkali land remediation, characterized in that, include: Connecting pipe (11), collecting pipe (12), manifold (10), drain pipe (13), pump truck (14), water guide channel (19), and return water cylinder assembly; The water collection pipe (12), the confluence pipe (10) and the drainage pipe (13) are buried in the field. The water collection pipe (12) and the drainage pipe (13) are installed on both sides of the confluence pipe (10). The connecting pipe (11) extends vertically from the surface of the field to the field and connects with the confluence pipe (10). The water collection pipe (12) is installed directly below the water guide channel (19) dug on the field. The pump truck (14) is used to pump water for saline-alkali land restoration into the water guide channel (19). The pump truck (14) is equipped with a lifting mechanism, which is connected to the return water cylinder assembly. The lifting mechanism is used to drive the return water cylinder assembly to move vertically in the connecting pipe (11). The outer wall of the return water cylinder assembly is attached to the inner wall of the connecting pipe (11), and the return water cylinder assembly is used to send the return water from the water collection pipe (12) to the water guide trough (19). The return water cylinder assembly includes a return water cylinder (1), a partition (2), a submersible pump (3), a first interface (4), and a detection head (5); The return water cylinder (1) has an inlet (101) on its side wall. The submersible pump (3) is located inside the return water tank (1) near the inlet (101); The detection head (5) is installed on one side of the submersible pump (3); The partition (2) is disposed inside the return water cylinder (1), and the partition (2) isolates the water inlet (101), the submersible pump (3), and the detection head (5) into a space; The first interface (4) is located at the outlet end of the submersible pump (3), and the first interface (4) passes upward through the partition (2). When the detection head (5) detects that the return water meets the reuse standard, the submersible pump (3) pumps the return water to the water guide tank (19). When the detection head (5) detects that the return water does not meet the reuse standard, the lifting mechanism drives the return water cylinder assembly to move upward in the connecting pipe (11), and the return water is discharged to the drain pipe (13). When the detection head (5) detects that the return water meets the reuse standard within a set time, the lifting mechanism drives the return water cylinder assembly to move upward in the connecting pipe (11) until it leaves the connecting pipe (11), and the return water is discharged to the drain pipe (13).

2. The circulating flushing equipment for saline-alkali land remediation as described in claim 1, characterized in that, The return water cylinder assembly also includes a telescopic column (6), a support plate (7), and a positioning frame (8); The central axis of the telescopic column (6) is parallel to the central axis of the return water cylinder (1) and does not coincide with the central axis of the return water cylinder (1); The telescopic column (6) includes a fixed part and a telescopic part. The fixed part is fixedly installed on the return water cylinder (1), and the telescopic part is slidably connected to the fixed part. The support plate (7) is fixed to the fixed part of the telescopic column (6). The top support point of the support plate (7) is in the same straight line as the axis of the return water cylinder (1). The support plate (7) is used to support the positioning frame (8). The top end of the telescopic part of the telescopic column (6) is fixedly connected to a top block (601), and the top block (601) is slidably connected to the positioning frame (8). When the telescopic part of the telescopic column (6) is not extended, the positioning frame (8) remains parallel and does not contact the inner wall of the connecting pipe (11); when the telescopic part of the telescopic column (6) is extended, the positioning frame (8) tilts and contacts the inner wall of the connecting pipe (11).

3. The circulating flushing equipment for saline-alkali land remediation as described in claim 2, characterized in that, The positioning frame (8) includes a first positioning strip with a common midpoint and two second positioning strips, the midpoint being on the same straight line as the axis of the return water cylinder (1); The top block (601) fixedly connected to the top of the telescopic column (6) is slidably connected to the first positioning strip. The first positioning strip has a first extension portion (801) extending downward from its end, and the second positioning strip has a second extension portion (802) extending upward from its end. The ends of the first extension (801) and the second extension (802) are respectively connected to friction posts (803).

4. The circulating flushing equipment for saline-alkali land remediation as described in claim 3, characterized in that, The first positioning strip has movable grooves (804) on both sides, which are parallel to the top and bottom surfaces of the first positioning strip. The top block (601) is fixedly connected to a sliding column located in the moving groove (804), and the sliding column can slide in the moving groove (804).

5. The circulating flushing equipment for saline-alkali land remediation as described in claim 1, characterized in that, The connecting pipe (11) has two openings (1101) along the axial direction of the manifold (10). One opening (1101) is connected to the water collection pipe (12), and the other opening (1101) is connected to the drain pipe (13). When the return water cylinder assembly moves to the bottom of the connecting pipe (11), the top of the return water cylinder (1) in the return water cylinder assembly is higher than the opening (1101), and a sealing ring (102) is provided at the top of the return water cylinder (1). A sealing plate (1001) is fixedly connected between the outer wall of the connecting pipe (11) and the inner wall of the manifold (10).

6. The circulating flushing equipment for saline-alkali land remediation as described in claim 5, characterized in that, The bottom end of the opening (1101) of the connecting pipe (11) near the drain pipe (13) is provided with a sand discharge port (1102), and the bottom end of the sand discharge port (1102) is flush with the bottom surface of the return water cylinder (1).

7. The circulating flushing equipment for saline-alkali land remediation as described in claim 1, characterized in that, The lifting mechanism includes a cable (9) and a winding reel (15); The winding reel (15) is installed at the top of the rear of the water pump truck (14); One end of the cable (9) is connected to the return water cylinder assembly, and the other end is connected to the winding reel (15); The winding reel (15) is used to wind up or unwind the cable (9).

8. The circulating flushing equipment for saline-alkali land remediation as described in claim 1, characterized in that, The water channel (19) is provided with hollow tubes (20) inserted into the ground at intervals along its length direction, and the tubes (20) are provided with water inlets at intervals along their own axis.

9. A circulating flushing method for saline-alkali land remediation, characterized in that, The circulating flushing equipment for saline-alkali land remediation according to any one of claims 1 to 8 comprises: A connecting pipe (11), a water collection pipe (12), a confluence pipe (10), and a drainage pipe (13) are buried in the field (18). The water collection pipe (12) and the drainage pipe (13) are installed on both sides of the confluence pipe (10). One end of the connecting pipe (11) is connected to the confluence pipe (10), and the other end extends out of the field (18). The pump truck (14) moves to the vicinity of the position where the connecting pipe (11) extends out of the field (18), and the lifting mechanism puts the return water cylinder assembly into the bottom of the connecting pipe (11) along the axis of the connecting pipe (11); A water guide channel (19) is dug on the surface of the field (18) directly above the water collection pipe (12) along the length of the water collection pipe (12). The water pump truck (14) pumps saline-alkali land remediation water into the water guide channel (19). The saline-alkali land remediation water in the water guide channel (19) seeps into the field (18) to flush the field (18). The return water after flushing the field (18) enters the water collection pipe (12). The return water collected by the water collection pipe (12) flows to the manifold (10), and the return water cylinder assembly detects whether the return water meets the reuse standard; If the reuse standard is met, the return water cylinder assembly will pump the return water to the water guide channel (19) for reuse, and the return water circulation will rinse the field (18); If the reuse standard is not met, the lifting mechanism will lift the return water cylinder assembly in the connecting pipe (11) so that the return water is discharged into the drain pipe (13). When the return water cylinder assembly detects that the return water consistently meets the reuse standard within a set time period, it is determined that the field (18) has been cleaned in a cycle. The water pump truck (14) stops pumping water for saline-alkali land restoration, and the lifting mechanism retracts the return water cylinder assembly into the connecting pipe (11).

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