A soil salt removal device

Abstract

The application relates to the technical field of soil remediation, in particular to a soil salt removal device which comprises a peripheral weir for separating soil, an inner peripheral weir arranged in the peripheral weir and a water pumping mechanism arranged in the inner peripheral weir; the peripheral weir is a cylindrical body with both ends being open; the inner peripheral weir is a circular cylindrical body structure with the upper end being open; a plurality of water inlet channels for connecting the inner and outer spaces of the inner peripheral weir and control mechanisms for controlling the opening / closing of the water inlet channels are uniformly distributed on the side wall of the inner peripheral weir; and the water pumping mechanism is used for pumping the water in the inner peripheral weir out of the peripheral weir. According to the scheme, the soil is soaked to make the salt in the soil fully dissolved in the water, and then the salt-containing water is pumped out, so that the soil salt removal is more thorough, and the desalination effect is better.

Description

Technical Field

[0001] This invention relates to the field of soil remediation technology, specifically to a soil salinity removal device. Background Technology

[0002] Saline-alkali land is a type of salt accumulation, referring to soil where the salt content affects the normal growth of crops. Most saline-alkali land is related to the accumulation of carbonates in the soil, resulting in generally high alkalinity. In severely saline-alkali soil areas, plants can hardly survive. Various types of saline-alkali soil are formed under specific natural conditions. The formation process mainly involves the horizontal and vertical redistribution of various soluble salts on the ground, leading to the gradual accumulation of salts in the surface layer of the soil in salt-accumulating areas. Severe soil salinization severely restricts agricultural development. Improving and restoring large areas of saline-alkali wasteland is of paramount importance for agricultural production development, land management, and ecological environmental protection.

[0003] Currently, the main methods for improving saline-alkali land include physical methods and chemical methods. Physical methods mainly rely on leaching to remove salt, combined with tillage, leaching, and siltation to achieve the goal of improving saline-alkali soil. However, conventional leaching methods for removing soil salts cannot fully dissolve the salts in the soil, resulting in poor soil salt removal effects. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a soil salinity removal device to solve the problem that conventional rinsing methods for removing soil salinity cannot fully dissolve the salt in the soil and have poor soil salinity removal effect.

[0005] To solve the above-mentioned technical problems, the present invention adopts a basic solution as follows: providing a soil salinity removal device, including an outer weir for separating the soil, an inner weir disposed within the outer weir, and a pumping mechanism disposed within the inner weir; the outer weir is a cylindrical body with open ends, the inner weir is a circular cylindrical structure with open top, and multiple water inlet channels connecting the inner and outer spaces of the inner weir and a control mechanism for controlling the opening / closing of the water inlet channels are evenly distributed on the side wall of the inner weir; the pumping mechanism is used to pump the water in the inner weir to the outside of the outer weir.

[0006] In the above basic scheme, the surface of the soil to be treated is leveled, and the outer dike is inserted into the soil to be treated to a certain depth. A water collection pit adapted to the inner dike is dug in the soil inside the outer dike. The inner dike is placed in the water collection pit so that the upper end of the inner dike is higher than the soil plane. The water inlet channel on the inner dike is closed by the control mechanism, and water is poured into the soil inside the outer dike to soak the soil. After the soil has been soaked for a period of time to dissolve as much salt as possible in the water, the water inlet channel on the inner dike is opened to allow the salt-containing water to enter the inner dike. The water pumping mechanism is operated to pump the salt-containing water that has entered the inner dike out of the outer dike for subsequent treatment. After the salt-containing water in the inner dike has been completely pumped out, the water inlet channel on the inner dike can be closed again, and water can be poured into the soil inside the outer dike again to repeat the soaking and desalination treatment multiple times to fully remove the salt from the soil.

[0007] Compared with existing methods of leaching saline soil, this method soaks the soil to fully dissolve the salts in the water before removing the saline water, resulting in more thorough salt removal and better desalination.

[0008] Furthermore, the lower outer diameter of the inner cofferdam is smaller than the upper outer diameter of the inner cylinder, and the water inlet channels are all located on the lower sidewall of the inner cofferdam. The saline water needs to flow into the inner cofferdam through the deeper soil layers, thus removing salt from the deeper soil.

[0009] Furthermore, the inner cofferdam includes an inner cylinder with an opening at the top and a rotating cylinder disposed within the side wall of the inner cylinder. An annular groove coaxial with the inner cylinder is disposed within the side wall of the inner cylinder. The upper end of the annular groove extends upward through the upper surface of the inner cylinder. The rotating cylinder is a circular cylinder with openings at both ends. The lower end of the rotating cylinder is located within the annular groove and is slidably connected to the inner cylinder. The upper end of the rotating cylinder extends upward beyond the upper end of the inner cylinder.

[0010] The water inlet channel includes a first through hole arranged radially between the annular groove and the outer wall of the inner cylinder, a third through hole coaxially arranged between the annular groove and the inner wall of the inner cylinder and the first through hole, and a second through hole coaxially arranged on the rotating cylinder with the first through hole.

[0011] The control mechanism is used to drive the rotating cylinder to rotate at a certain angle so that the second through hole is offset from the first through hole and the third through hole to isolate the water inlet channel.

[0012] Furthermore, the control mechanism includes a motor mounted on the inner cylinder, a gear coaxially and fixedly connected to the output shaft of the motor, and an arc-shaped rack mounted on the upper outer wall of the rotating cylinder and meshing with the gear, wherein the arc-shaped rack is coaxially arranged with the rotating cylinder.

[0013] Furthermore, to prevent soil from entering the inner cofferdam through the water inlet channel, a filter screen is installed inside the first through hole.

[0014] Furthermore, a vertical groove corresponding to the first through hole is provided on the side wall of the annular groove away from the axis of the inner cylinder. The upper end of the vertical groove extends upward through the upper end face of the inner cylinder. The inner wall of the vertical groove is set as an arc-shaped surface coaxial with the inner cylinder. A closing ring is provided on the upper end face of the inner cylinder to close the upper end of the vertical groove. A connecting hole connecting the vertical groove and the first through hole is provided on the side wall of the inner cylinder. A protrusion corresponding to the vertical groove is provided on the outer wall of the rotating cylinder. The side wall of the protrusion away from the axis of the inner cylinder is aligned with the inner wall of the vertical groove. A sealed sliding connection is provided, with the upper end face of the protrusion and the lower end face of the closing ring in a sealed sliding connection, and the lower end face of the protrusion and the inner bottom surface of the vertical groove in a sealed sliding connection. The closing ring is provided with a strip-shaped vent hole corresponding to the vertical groove, which connects the outer space of the inner cylinder with the upper inner cavity of the vertical groove away from the first through hole. The length of the strip-shaped vent hole is greater than the width of the protrusion, so that when the rotating cylinder rotates to a predetermined position to close the water inlet channel, the strip-shaped vent hole is connected to the inner cavity of the vertical groove on both sides of the protrusion.

[0015] Furthermore, the outer perimeter weir is a circular enclosure formed by sequentially connecting multiple arc-shaped plates. In the above scheme, the outer perimeter weir can be disassembled into multiple arc-shaped plates, facilitating its transportation and assembly.

[0016] Furthermore, one side of the arc-shaped plate is configured as a protruding T-shaped block, and the other side of the arc-shaped plate is configured with a T-shaped groove that mates with the T-shaped block.

[0017] Furthermore, the outer wall of the inner cylinder is provided with lifting lugs.

[0018] Furthermore, the pumping mechanism includes a pump installed inside the inner cylinder and a drain pipe connected to the pump. One end of the drain pipe is connected to the pump, and the other end of the drain pipe is located outside the outer weir.

[0019] The present invention has at least the following beneficial effects:

[0020] Compared to existing technologies that remove soil salinity solely through rinsing, this solution soaks the soil to fully dissolve the salts in the water before pumping out the saline solution, resulting in more thorough and effective desalination. The outer weir can be disassembled into multiple arc-shaped plates, facilitating its transportation and assembly. A clever structural design automatically flushes the inlet channel's filter screen during the opening of the inlet channel by a manually driven rotating cylinder, preventing soil accumulation and clogging, and improving the filtration and drainage rate. Furthermore, this device ensures that the saline solution flows through deep soil into the inner weir via the inlet channel, effectively removing salts from the deeper soil layers as well. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is a top view schematic diagram of the structure of a soil salinity removal device according to the present invention.

[0023] Figure 2 This is a schematic diagram of the inner cofferdam from a top-down view.

[0024] Figure 3 This is a schematic diagram of the structure of the inner cofferdam from the main view direction.

[0025] Figure 4 for Figure 1 Enlarged view of section A.

[0026] Figure 5 for Figure 2 Enlarged view of section B in the middle.

[0027] Figure 6 When the water inlet channel is closed Figure 2 A schematic diagram of the structure of section B.

[0028] Figure 7 for Figure 5 Sectional view of AA.

[0029] Figure 8 for Figure 5 BB section view.

[0030] Figure 9 for Figure 6 CC section view.

[0031] Figure 10 This is a schematic diagram of the structure of the outer dam as viewed from above.

[0032] Figure 11 This is a schematic diagram of the curved plate from a top-down view.

[0033] The meanings of the labels in the attached diagram are as follows:

[0034] 10 outer weir, 101 arc plate, 102 T-block, 103 T-groove, 20 inner weir, 201 inner cylinder, 2011 first through hole, 2012 second through hole, 2013 third through hole, 2014 filter screen, 2015 connecting hole, 202 rotating cylinder, 2021 protrusion, 203 annular groove, 2031 vertical groove, 204 closed ring, 2041 strip-shaped vent hole, 30 pumping mechanism, 301 pump, 302 drain pipe, 401 motor, 402 gear, 403 arc rack, 50 lifting lug, 60 water storage space. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0037] This embodiment provides a soil salinity removal device, such as... Figure 1 As shown, it includes an outer weir 10 for separating the soil, an inner weir 20 disposed within the outer weir 10, and a pumping mechanism 30 disposed within the inner weir 20. The outer weir 10 is a cylindrical body with openings at both ends, and the inner weir 20 is a circular cylindrical structure with an opening at the top. Multiple water inlet channels connecting the inner and outer spaces of the inner weir 20 and a control mechanism for controlling the opening / closing of the water inlet channels are evenly distributed on the side wall of the inner weir 20. The pumping mechanism 30 is used to pump the water in the inner weir 20 to the outside of the outer weir 10.

[0038] Combination Figure 10 , Figure 11 As shown, the outer perimeter weir 10 is a circular enclosure formed by connecting multiple arc-shaped plates 101 in sequence. Specifically, in this embodiment, the outer perimeter weir is composed of 8 arc-shaped plates. One side of each arc-shaped plate 101 is provided with a protruding T-shaped block 102, and the other side of each arc-shaped plate 101 is provided with a T-shaped groove 103 that mates with the T-shaped block 102. The outer perimeter weir 10 can be disassembled into multiple arc-shaped plates 101, which facilitates the transportation and assembly of the outer perimeter weir 10. In other feasible embodiments, other suitable numbers of arc-shaped plates 101 can be selected to form the outer perimeter weir according to the size of the outer perimeter weir 10. Examples are not given here.

[0039] like Figure 3As shown, the inner cofferdam 20 includes a circular inner cylinder 201 with an open upper end and a rotating cylinder 202 disposed within the side wall of the inner cylinder 201. The lower outer diameter of the inner cylinder 201 is smaller than the upper outer diameter. All water inlet channels are disposed on the lower side wall of the inner cofferdam 20. An annular groove 203, coaxial with the inner cylinder 201, is disposed within the side wall of the inner cylinder 201. The upper end of the annular groove 203 extends upward through the upper surface of the inner cylinder 201. The rotating cylinder 202 is a circular cylinder with open ends. The lower end of the rotating cylinder 202 is located within the annular groove 203 and is slidably connected to the inner cylinder 201. The upper end of the rotating cylinder 202 extends upward beyond the upper end of the inner cylinder 201. Figure 2 , Figure 3 , Figure 5 , Figure 6 As shown, the water inlet channel includes a first through hole 2011 radially disposed between the annular groove 203 and the outer wall of the inner cylinder 201, a third through hole 2013 coaxially disposed with the first through hole 2011 between the annular groove 203 and the inner wall of the inner cylinder 201, and a second through hole 2012 coaxially disposed with the first through hole 2011 on the rotating cylinder 202. To prevent soil from entering the inner cofferdam 20 through the water inlet channel, a filter screen 2014 is disposed in the first through hole 2011. Figure 2 As shown, in order to facilitate the hoisting of the inner cylinder 201 into the water collection pit, lifting lugs 50 are provided on the outer wall of the inner cylinder 201.

[0040] like Figure 2 , Figure 5 , Figure 7 , Figure 8 , Figure 9As shown, the annular groove 203 has vertical grooves 2031 on its sidewall away from the axis of the inner cylinder 201, corresponding one-to-one with the first through holes 2011. The upper end of the vertical groove 2031 extends upward through the upper end face of the inner cylinder 201. The inner wall of the vertical groove 2031 is set as an arc-shaped surface coaxial with the inner cylinder 201. A closing ring 204 is provided on the upper end face of the inner cylinder 201 to close the upper port of the vertical groove 2031. The closing ring 204 is fixedly connected to the upper end face of the inner cylinder 201 by screws. A connecting hole 2015 is provided on the sidewall of the inner cylinder 201 to connect the vertical groove 2031 with the first through hole 2011. The outer wall of the rotating cylinder 202 has a protrusion corresponding to the vertical groove 2031. The corresponding protrusion 2021, the side wall of the protrusion 2021 away from the axis of the inner cylinder 201 is slidably connected to the inner wall of the vertical groove 2031, the width of the protrusion 2021, the upper end face of the protrusion 2021 is slidably connected to the lower end face of the closing ring 204, the solid dimension of the protrusion 2021 on the arc coaxial with the inner cylinder 201 is defined as the width dimension of the protrusion 2021, the lower end face is slidably connected to the inner bottom surface of the vertical groove 2031, and the closing ring 204 is provided with a strip-shaped vent hole 2041 corresponding to the vertical groove 2031, which connects the external space of the inner cylinder 201 with the upper inner cavity of the vertical groove 2031 away from the first through hole 2011, such as Figure 4 , Figure 6 As shown, the length of the strip-shaped vent 2041 is set along an arc coaxial with the inner cylinder 201. The length of the strip-shaped vent 2041 is greater than the width of the protrusion 2021, so that when the rotating cylinder 202 rotates to the predetermined position to close the water inlet channel, the strip-shaped vent 2041 is connected to the inner cavity of the vertical groove 2031 on both sides of the protrusion 2021. When the rotating cylinder 202 rotates to the predetermined position to close the water inlet channel, the second through hole 2012 is offset from the third through hole 2013 and the first through hole 2011. The rotating cylinder 202 separates the first through hole 2011 from the third through hole 2013. At this time, the minimum distance between the inner wall of the second through hole 2012 and the inner wall of the third through hole 2013 is greater than the length of the strip-shaped vent 2041.

[0041] The control mechanism is used to drive the rotating cylinder 202 to rotate at a certain angle so that the second through hole 2012 is offset from the first through hole 2011 and the third through hole 2013 to isolate the water inlet channel. Specifically, in conjunction with Figure 1 , Figure 3 , Figure 4As shown, the control mechanism includes a motor 401 mounted on the upper outer wall of the inner cylinder 201, a gear 402 coaxially and fixedly connected to the output shaft of the motor 401, and an arc-shaped rack 403 mounted on the upper outer wall of the rotating cylinder 202 and meshing with the gear 402. The motor 401 is fixedly connected to the upper outer wall of the inner cylinder 201, and the output shaft of the motor 401 is parallel to the axis of the inner cylinder 201. The motor 401 is connected to an external power source. The arc-shaped rack 403 is coaxially mounted with the rotating cylinder 202 and fixedly connected to the rotating cylinder 202. Running the motor 401 causes the motor 401 to rotate at a certain angle, thereby driving the gear 402 to rotate, and the arc-shaped rack 403 meshing with the gear 402 drives the rotating cylinder 202 to rotate around the axis of the inner cylinder 201 at a certain angle.

[0042] The pumping mechanism 30 includes a pump 301 installed inside the inner cylinder 201 and a drain pipe 302 connected to the pump 301. The pump 301 is an electric pump connected to an external power source. One end of the drain pipe 302 is connected to the pump 301, and the other end of the drain pipe 302 is located outside the outer weir 10.

[0043] The principles and beneficial effects of this invention are as follows:

[0044] The surface of the soil to be treated is leveled. The arc-shaped plates 101 are connected in sequence to form an outer weir 10, which is then inserted into the soil to be treated to a certain depth. A water collection pit adapted to the outer wall of the inner cylinder 201 is dug in the soil within the outer weir 10. The inner cylinder 201 is placed into the water collection pit so that its upper end is above the soil surface. The motor 401 is controlled to drive the rotating cylinder 202 to rotate at a certain angle so that the protrusion 2021 is in a predetermined position, thereby closing the water inlet channel on the side wall of the inner cylinder 201. When the protrusion 2021 slides in the vertical groove 2031, the gas in the vertical groove 2031 is released through the strip-shaped ventilation hole. 2041 enters and exits the vertical groove 2031. At this time, a water storage space 60 is formed in the vertical groove 2031 on the side of the protrusion 2021 near the first through hole 2011. Water can pass through the filter screen 2014 and then enter the water storage space 60 through the connecting hole 2015. After the inner cylinder 201 is placed into the water collection pit, the gap between the upper outer wall of the inner cylinder 201 and the inner wall of the water collection pit is filled and sealed with soil to prevent saline body from flowing into the water collection pit from the port of the water collection pit through the gap between the outer wall of the inner cylinder 201 and the inner wall of the water collection pit. This forces the saline body to flow into the inner cylinder 201 from the deep soil through the water inlet channel.

[0045] Water is poured into the soil inside the outer weir 10 to soak it. After the soil has been soaked for a period of time to dissolve as much salt as possible in the water, the motor 401 drives the rotating drum 202 to rotate until the second through hole 2012 is aligned with the first through hole 2011 and the third through hole 2013. The saline body inside the outer weir 10 enters the inner weir 20 through the water inlet channel. The pump 301 is operated to pump the saline body that has entered the inner weir 20 out to the outside of the outer weir 10 through the drain pipe 302 for further treatment. After the saline body inside the inner weir 20 has been completely pumped out, the motor 401 can be controlled again to drive the rotating drum 202 to rotate and close the water inlet channel on the inner weir 20. Water is then poured into the soil inside the outer weir 10 again to repeat the soaking and desalination process multiple times to fully remove the salt from the soil.

[0046] When the soil is soaked, the water in the soil passes through the filter screen 2014 and enters the water storage space 60 formed in the vertical groove 2031 on the side of the protrusion 2021 near the first through hole 2011 through the connecting hole 2015. When the motor 401 drives the rotating cylinder 202 to rotate and align the second through hole 2012 with the first through hole 2011 and the third through hole 2013, the water storage space 60 is compressed, and the water in the water storage space 60 is squeezed through the connecting hole 2015 into the first through hole 2011 and then flows out of the first through hole 2011 quickly. When the water flows out of the inner cylinder 201 quickly, it knocks away the soil that may be adhering to the outside of the filter screen 2014, thereby achieving the purpose of cleaning the filter screen 2014.

[0047] Compared with existing technologies that only remove soil salts by rinsing, this solution soaks the soil to fully dissolve the salts in the water before pumping out the saline water, resulting in more thorough salt removal and better desalination. The outer weir 10 of this solution can be disassembled into multiple arc-shaped plates 101, facilitating the transportation and assembly of the outer weir 10. Through ingenious structural design, the filter screen 2014 in the first through hole 2011 is automatically flushed during the process of the rotating cylinder 202 driven by the motor 401 to open the water inlet channel, preventing soil accumulation and clogging of the filter screen 2014 and increasing the water inlet speed of the water inlet channel. This device ensures that the saline water flows into the inner weir 20 through the deep soil via the water inlet channel, thus fully removing the salts from the deep soil as well.

[0048] The above are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics in the solutions is not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A soil salt removal device, comprising a peripheral weir for partitioning soil, an inner weir arranged in the peripheral weir, and a water pumping mechanism arranged in the inner weir, characterized in that: the peripheral weir is a cylindrical body with both ends open, and the inner weir is a circular cylindrical structure with an upper end open; a plurality of water inlet channels for connecting the inner and outer spaces of the inner weir are evenly distributed on the side wall of the inner weir; and a control mechanism for controlling the opening and closing of the water inlet channels is arranged on the side wall of the inner weir. The inner weir comprises an inner cylinder with an upper end open and a rotating cylinder arranged in the side wall of the inner cylinder; an annular groove coaxial with the inner cylinder is arranged in the side wall of the inner cylinder, and the upper end of the annular groove penetrates the upper surface of the inner cylinder; the rotating cylinder is a circular cylindrical body with both ends open, and the lower end of the rotating cylinder is in sliding connection with the inner cylinder in the annular groove, and the upper end of the rotating cylinder extends out of the upper end of the inner cylinder. The water inlet channel comprises a first through hole arranged between the annular groove and the outer wall of the inner cylinder in the radial direction of the inner cylinder, a third through hole coaxial with the first through hole and arranged between the annular groove and the inner wall of the inner cylinder, and a second through hole coaxial with the first through hole and arranged on the rotating cylinder. The control mechanism is used to drive the rotating cylinder to rotate so that the second through hole is staggered with the first through hole and the third through hole to block the water inlet channel. The water pumping mechanism is used to pump the water in the inner weir out of the outer weir. The outer diameter of the lower part of the inner weir is smaller than the outer diameter of the upper part of the inner cylinder, and the water inlet channels are arranged on the side wall of the lower part of the inner weir.

2. The soil salinity removal device of claim 1, wherein: The control mechanism comprises a motor arranged on the inner cylinder, a gear fixedly connected with the output shaft of the motor, and an arc-shaped rack arranged on the upper outer wall of the rotating cylinder and engaged with the gear, and the arc-shaped rack is coaxial with the rotating cylinder.

3. The soil salinity removal apparatus of claim 2, wherein: A filter screen is arranged in the first through hole.

4. The soil salinity removal device of claim 3, wherein: A vertical groove corresponding to the first through hole is arranged on the side wall of the annular groove away from the axis of the inner cylinder, the upper end of the vertical groove penetrates the upper end surface of the inner cylinder, the inner wall of the vertical groove is arranged as an arc surface coaxial with the inner cylinder, a closing ring for closing the upper end of the vertical groove is arranged on the upper end surface of the inner cylinder, a connecting hole for connecting the vertical groove with the first through hole is arranged on the side wall of the inner cylinder, a protrusion corresponding to the vertical groove is protruded on the outer wall of the rotating cylinder, the side wall of the protrusion away from the axis of the inner cylinder is in sealing sliding connection with the inner wall of the vertical groove, the upper end surface of the protrusion is in sealing sliding connection with the lower end surface of the closing ring, the lower end surface of the protrusion is in sealing sliding connection with the inner bottom surface of the vertical groove, a strip-shaped vent hole for connecting the outer space of the inner cylinder with the upper inner cavity of the vertical groove away from the side of the first through hole is arranged on the closing ring corresponding to the vertical groove, and the length of the strip-shaped vent hole is greater than the width of the protrusion, so that when the rotating cylinder is rotated to close the water inlet channel, the strip-shaped vent hole is in communication with the inner cavities of the vertical grooves on both sides of the protrusion.

5. The soil salinity removal device of claim 4, wherein: The peripheral weir is a circular surrounding plate formed by sequentially connecting a plurality of arc-shaped plates.

6. The soil salinity removal device of claim 5, wherein: One side edge of the arc-shaped plate is arranged as a protruding T-shaped block, and the other side edge of the arc-shaped plate is arranged with a T-shaped groove matched with the T-shaped block.

7. The soil salinity removal apparatus of claim 6, wherein: ​ 8. The soil salinity removal device of claim 2, wherein: A lug is arranged on the outer wall of the inner cylinder.

9. The soil salinity removal device of claim 2, wherein: The water pumping mechanism comprises a water pump arranged in the inner cylinder and a drain pipe communicated with the water pump, one end of the drain pipe is communicated with the water pump, and the other end of the drain pipe is located outside the peripheral weir.

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