Soil leaching apparatus

Abstract

The utility model discloses a soil leaching device, including leaching column, water distribution mechanism and liquid supply mechanism, be equipped with the soil filling area in the leaching column, and the top and bottom of leaching column are equipped with the liquid inlet end and liquid outlet end of being connected to soil filling area respectively, water distribution mechanism includes mesh plate, at least two filter screen board and at least one water -permeable sponge piece, mesh plate and at least two filter screen board are installed in leaching column from top to bottom interval in proper order, and are located above soil filling area, and water -permeable sponge piece is installed in leaching column and is located between two adjacent filter screen board, and the buffer gap is formed between water -permeable sponge piece and two side filter screen board, liquid supply mechanism is connected with liquid inlet end, and can transport liquid to leaching column. The problem of the uniformity of rainfall leaching simulated by the water distribution mechanism in the soil leaching device in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to a soil leaching device. Background Technology

[0002] In conducting soil erosion tests, soil infiltration tests, and other scientific experiments that require simulated rainfall, artificial rainfall simulation devices are typically used to simulate rainfall in order to avoid the influence of natural factors, obtain the necessary data quickly within a given time, and successfully complete the planned experiment.

[0003] For example, the existing patent document with patent number CN216595122U discloses a device including a rainwater storage tank and a leaching column. The rainwater storage tank is connected to the top cover of the leaching column via a hose. The hose is equipped with a peristaltic pump for adjusting the rainwater flow rate. The interior of the leaching column is equipped with a soil filling area, a filtration device, and a water distribution device. The filtration device is located at the bottom of the soil filling area, and the water distribution device is located at the top of the soil filling area. The bottom end of the leaching column is equipped with a drain valve. The water distribution device consists of an orifice plate and a foamed sponge attached to the upper part of the orifice plate. With the above solution, simply attaching the foamed sponge to the upper part of the orifice plate to simulate rainfall has a limited effect on water droplet refinement. Moreover, the refinement effect of the foamed sponge is weakened by the orifice plate, and it cannot fully utilize its advantage of forming small and uniform water droplets, resulting in insufficient uniformity of simulated rainfall leaching. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a drying and shaping device that solves the problem of insufficient uniformity in the water distribution mechanism of existing soil leaching devices when simulating rainfall leaching.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This utility model provides a soil leaching device, comprising: A leaching column, which has a soil filling area inside, and the top and bottom of the leaching column are respectively provided with an inlet end and a outlet end connected to the soil filling area; A water distribution mechanism includes a perforated plate, at least two filter screens, and at least one permeable sponge block. The perforated plate and the at least two filter screens are sequentially installed from top to bottom at intervals within a leaching column and are located above the soil filling area. The permeable sponge block is installed in the leaching column and located between two adjacent filter screens, and a buffer gap is formed between the permeable sponge block and the filter screens on both sides. A liquid supply mechanism is connected to the liquid inlet and is capable of delivering liquid into the elution column.

[0006] In some embodiments, the water distribution mechanism further includes a connecting seat and at least one support ring block. The connecting seat is installed inside the leaching column and has a channel. The perforated plate is fixed inside the channel. At least one support ring block and at least two filter screens are movably disposed inside the channel. The opposite ends of the support ring block abut against two adjacent filter screens respectively. The permeable sponge block is installed on the support ring block.

[0007] In some embodiments, the leaching column includes a column body and a top cover, the column body is provided with a soil filling area, the bottom of the column body is provided with a drain end, and the top cover is provided with a liquid inlet end; The connecting seat includes a seat body and a cover. The channel is formed in the seat body. The cover is detachably connected to one end of the seat body. The cover has a through hole. The seat body and the top cover are detachably connected to the column body via multiple locking elements.

[0008] In some embodiments, each sieve hole on the perforated plate is fitted with a rubber stopper, and each rubber stopper is fitted with a liquid guide tube.

[0009] In some embodiments, at least two of the filter screens are covered with at least one nonwoven fabric layer.

[0010] In some embodiments, the liquid supply mechanism includes a liquid storage tank and a liquid extraction component. The liquid storage tank is used to hold liquid and is connected to the inlet end of the liquid extraction component.

[0011] In some embodiments, a filtration mechanism is also included, which is disposed within the column and supported below the soil filling area, and has a plurality of leakage holes for connecting the soil filling area with the drainage end.

[0012] In some embodiments, the filtration mechanism includes a pressure plate, a plurality of support columns and at least one nylon mesh layer. One end of the plurality of support columns is fixedly connected to the pressure plate. The pressure plate has a plurality of leakage holes. The pressure plate and the bottom of the columns have a height difference. At least one nylon mesh layer is laid on the pressure plate.

[0013] In some embodiments, a detection device is also included, which includes a plurality of moisture content sensors, a plurality of ORP sensors and a data collector. The plurality of moisture content sensors and the plurality of ORP sensors are spaced apart along the height direction of the column and inserted into the soil filling area. The plurality of moisture content sensors are electrically connected to one of the data collectors, and the plurality of ORP sensors are electrically connected to another data collector.

[0014] In some embodiments, the column is provided with a plurality of sampling holes spaced apart along its height, and each of the sampling holes is fitted with a plug.

[0015] Compared with the prior art, the soil leaching device provided by this utility model has a soil filling area in the leaching column. The top and bottom of the leaching column are respectively provided with an inlet end and a outlet end connected to the soil filling area. A perforated plate and at least two filter plates are installed sequentially from top to bottom in the leaching column and are located above the soil filling area. A permeable sponge block is installed in the leaching column and is located between two adjacent filter plates. A buffer gap is formed between the permeable sponge block and the filter plates on both sides. The liquid supply mechanism is connected to the inlet end and can deliver liquid into the leaching column. After the liquid enters the leaching column, it can be initially refined by the perforated plate. Subsequently, during the liquid falling, the fine pores of the filter plate can further refine the water flow dispersed by the perforated plate, forming fine water droplets that are closer to natural rainfall. The buffer gap between the filter plate and the permeable sponge block can allow the water droplets sufficient time to diffuse and distribute evenly. The permeable sponge can further disperse the water flow, reduce water flow concentration, and effectively improve the uniformity of rainfall. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a soil leaching device provided by this utility model; Figure 2 yes Figure 1 Enlarged view of region A in the middle; Figure 3 This is a schematic diagram of the water distribution mechanism provided by this utility model; Figure 4 This is a schematic diagram of the structure of the support ring block provided by this utility model; Figure 5 This is a schematic diagram of the structure of the filter screen provided by this utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0018] To address the technical problem of insufficient uniformity in simulated rainfall leaching caused by the water distribution mechanism within existing soil leaching devices, this solution provides a soil leaching device that enables multiple diffusions and uniform distribution of water flow, thereby improving the uniformity of simulated rainfall leaching.

[0019] Please see Figures 1-5 , Figures 1-5A soil leaching device according to one embodiment of the present invention includes a leaching column 1, a water distribution mechanism 2, and a liquid supply mechanism 3. The leaching column 1 has a soil filling area 1a. The top and bottom of the leaching column 1 are respectively provided with an inlet end 1b and a outlet end 1c connected to the soil filling area 1a. The water distribution mechanism 2 includes a perforated plate 21, at least two filter screens 22, and at least one permeable sponge block 23. The perforated plate 21 and the at least two filter screens 22 are installed sequentially from top to bottom in the leaching column 1 and are located above the soil filling area 1a. The permeable sponge block 23 is installed in the leaching column 1 and is located between two adjacent filter screens 22. A buffer gap 2a is formed between the permeable sponge block 23 and the filter screens 22 on both sides. The liquid supply mechanism 3 is connected to the inlet end 1b and can deliver liquid into the leaching column 1.

[0020] In actual use, the water flow is stably delivered into the leaching column 1 by the liquid supply mechanism 3. The sieve holes on the mesh plate 21 can initially refine the water flow. Subsequently, when the water flow drips onto the filter screen plate 22, the fine holes of the filter screen plate 22 can further refine the water flow dispersed by the mesh plate 21. The refined water flow can be diffused and evenly distributed again within the buffer gap 2a. The permeable sponge block 23 can further disperse the water flow and reduce water flow concentration. The water flow alternately passes through the filter screen plate 22 and the permeable sponge block 23, which can effectively improve the uniformity of simulated rainfall leaching.

[0021] The leaching column 1 is made of acrylic material, which has excellent properties such as good chemical stability (corrosion resistance, pollution resistance), high impact strength, lightweight and reusability. Specifically, the leaching column 1 has an inner diameter of 20 cm, an outer diameter of 21 cm, and a total height of 100 cm.

[0022] It should be noted that, based on the above scheme, the water distribution mechanism 2 further includes a connecting seat 24 and at least one supporting ring block 25. The connecting seat 24 is installed inside the leaching column 1. The connecting seat 24 has a channel 24a. The mesh plate 21 is fixed in the channel 24a. At least one supporting ring block 25 and at least two filter screens 22 are movably disposed in the channel 24a. The opposite ends of the supporting ring block 25 abut against two adjacent filter screens 22 respectively. The permeable sponge block 23 is installed on the supporting ring block 25.

[0023] Specifically, the leaching column 1 includes a column body 11 and a top cover 12. The column body 11 has a soil filling area 1a inside, and a drain end 1c is provided at the bottom of the column body 11. The top cover 12 has a liquid inlet end 1b and an air hole for maintaining stable internal and external air pressure. The connecting seat 24 includes a seat body 241 and a cover 242. The channel 24a is formed inside the seat body 241. The cover 242 is detachably connected to one end of the seat body 241. The cover 242 has a through hole. The seat body 241 and the top cover 12 are detachably connected to the column body 11 via multiple locking elements.

[0024] It is understood that the seat 241 is cylindrical, and one end of the seat 241 is provided with an external thread, and the cover 242 is provided with an internal thread that mates with the external thread; wherein, the other end of the seat 241 is provided with an annular flange, and the annular flange is provided with multiple connecting holes along the circumferential direction; the column 11 is provided with a first annular pressure block, and the first annular pressure block is provided with multiple first through holes along the circumferential direction; the top cover 12 is provided with a second annular pressure block, and the second annular pressure block is provided with multiple second through holes along the circumferential direction; the locking component includes a locking bolt and a locking nut. When the annular flange is located between the first annular pressure block and the second annular pressure block, and the connecting hole corresponds to the first through hole and the second through hole, the locking bolt can be inserted into the first through hole, the connecting hole and the second through hole and screwed into the locking nut.

[0025] Furthermore, based on the above scheme, sealing gaskets are pressed between the first annular pressing block and the annular flange, and between the second annular pressing block and the annular flange.

[0026] Specifically, when the filter screen and permeable sponge block 23 need to be cleaned or replaced, the column 11 and top cover 12 can be disassembled. After removing the base 241, the cover 242 can be disassembled and reassembled by rotating the base 241 and the cover 242 relative to each other. The inner diameter of the through hole on the cover 242 is smaller than the diameter of the filter screen 22. The lowermost filter screen 22 abuts against the cover 242. After the cover 242 is separated from the base 241, the filter screen 22, permeable sponge block 23 and support ring block 25 can move into or out of the channel 24a. When the cover 242 is installed on the base 241, the filter screen 22, permeable sponge block 23 and support ring block 25 can be locked in the channel 24a.

[0027] The inner wall of the support ring block 25 is provided with annular protrusions, which can support the permeable sponge block 23.

[0028] Based on the above scheme, in order to adjust the rainfall intensity, specifically, each sieve hole on the mesh plate 21 is equipped with a rubber stopper 26, and each rubber stopper 26 is fitted with a liquid guide tube 27. It should be noted that the rubber stopper 26 can be a penicillin bottle stopper. The rubber stopper 26 is inserted from above the mesh plate 21, and the diameter of the sieve hole on the mesh plate 21 should be 2 mm smaller than the diameter of the rubber stopper 26. The rainfall intensity can be adjusted simply by replacing the liquid guide tubes 27 with different inner diameters.

[0029] Based on the above scheme, in order to further improve the uniformity of simulated rainfall leaching, specifically, at least two of the filter screens 22 are covered with at least one non-woven fabric layer.

[0030] It should be noted that, based on the above scheme, the liquid supply mechanism 3 includes a liquid storage tank 31 and a liquid extraction component 32. The liquid storage tank 31 is used to hold liquid. The liquid storage tank 31 is connected to the liquid inlet 1b of the liquid extraction component 32. Specifically, the liquid extraction component 32 is a peristaltic pump. When the liquid in the liquid storage tank 31 is pumped into the leaching column 1 by the peristaltic pump, the water supply pressure should be kept stable.

[0031] Based on the above solution, in one embodiment, a filter mechanism 4 is also included. The filter mechanism 4 is disposed inside the column 11 and supported below the soil filling area. The filter mechanism 4 has a plurality of leakage holes for connecting the soil filling area with the drainage end 1c.

[0032] In addition, water can be injected and drained into the leaching column 1 through the drain end 1c. A ball valve is installed on the drain end 1c, and an external silicone tube is connected to a peristaltic pump to facilitate precise control of the injection and drainage volume and rate.

[0033] Specifically, the filtration mechanism 4 includes a pressure plate 41, multiple support columns 42, and at least one nylon mesh layer. One end of each support column 42 is fixedly connected to the pressure plate 41. The pressure plate 41 has multiple leakage holes. There is a height difference between the pressure plate and the bottom of the columns. At least one nylon mesh layer is laid on the pressure plate 41. The height difference between the pressure plate 41 and the bottom of the columns is 15 cm. The pressure plate 41 is a perforated plexiglass plate. The pressure plate 41 supports the upper soil-water mixture layer and prevents collapse. Multiple support columns 42 can improve the pressure-bearing capacity of the pressure plate. It should be noted that by attaching 300-mesh nylon mesh to the surface of the bearing plate, the loss of soil filled in the soil filling area 1a can be effectively prevented.

[0034] Based on the above scheme, in order to facilitate soil testing within the soil filling area 1a, specifically, It also includes a detection device 5, which includes multiple moisture content sensors 51, multiple ORP sensors 52 and two data collectors 53. The multiple moisture content sensors 51 and multiple ORP sensors 52 are all spaced apart along the height direction of the column 11 and inserted into the soil filling area 1a. The multiple moisture content sensors 51 are electrically connected to one data collector 53 and the multiple ORP sensors 52 are electrically connected to the other data collector 53.

[0035] Specifically, the moisture content in the soil within the soil filling area 1a is monitored in real time by a moisture content sensor 51, and the redox environment changes within the soil filling area 1a are monitored in real time by an ORP sensor 52. Both data collectors 53 are used to collect and store the real-time data generated by the sensors.

[0036] Furthermore, based on the above scheme, the column 11 is provided with multiple sampling holes spaced apart along its height, and each sampling hole is fitted with a plug. Specifically, by setting up sampling holes, it is possible to conveniently collect soil and aquifer samples in layers. Furthermore, the leaching column 1 has at least one injection / drainage hole at heights of 10cm, 25cm, and 45cm. The diameter of the injection / drainage hole is 0.6cm, and a 300-mesh nylon mesh is embedded inside the injection / drainage hole to prevent clogging. A ball valve and a silicone hose (inner diameter 0.35-0.4cm) are connected to the injection / drainage hole to realize multi-point dynamic injection / drainage.

[0037] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A soil leaching device, characterized in that, include: A leaching column, which has a soil filling area inside, and the top and bottom of the leaching column are respectively provided with an inlet end and a outlet end connected to the soil filling area; A water distribution mechanism includes a perforated plate, at least two filter screens, and at least one permeable sponge block. The perforated plate and the at least two filter screens are sequentially installed from top to bottom at intervals within a leaching column and are located above the soil filling area. The permeable sponge block is installed in the leaching column and located between two adjacent filter screens, and a buffer gap is formed between the permeable sponge block and the filter screens on both sides. A liquid supply mechanism is connected to the liquid inlet and is capable of delivering liquid into the elution column.

2. The soil leaching device according to claim 1, characterized in that, The water distribution mechanism further includes a connecting seat and at least one support ring block. The connecting seat is installed inside the leaching column and has a channel. The perforated plate is fixed inside the channel. At least one support ring block and at least two filter screens are movably disposed inside the channel. The opposite ends of the support ring block abut against two adjacent filter screens respectively. The permeable sponge block is installed on the support ring block.

3. A soil leaching device according to claim 2, characterized in that, The leaching column includes a column body and a top cover. The column body is provided with a soil filling area, the bottom of the column body is provided with a drain end, and the top cover is provided with a liquid inlet end. The connecting seat includes a seat body and a cover. The channel is formed in the seat body. The cover is detachably connected to one end of the seat body. The cover has a through hole. The seat body and the top cover are detachably connected to the column body via multiple locking elements.

4. A soil leaching device according to claim 3, characterized in that, Each sieve hole on the perforated plate is fitted with a rubber stopper, and each rubber stopper is fitted with a liquid guide tube.

5. A soil leaching device according to claim 4, characterized in that, At least two of the filter screens are covered with a non-woven fabric layer.

6. A soil leaching device according to claim 5, characterized in that, The liquid supply mechanism includes a liquid storage tank and a liquid extraction component. The liquid storage tank is used to hold liquid, and the liquid storage tank is connected to the liquid inlet end of the liquid extraction component.

7. A soil leaching device according to claim 6, characterized in that, It also includes a filtration mechanism, which is located inside the column and supported below the soil filling area, and has multiple leakage holes for connecting the soil filling area with the drainage end.

8. A soil leaching device according to claim 7, characterized in that, The filtration mechanism includes a pressure plate, multiple support columns, and at least one nylon mesh layer. One end of each of the multiple support columns is fixed to the pressure plate. The pressure plate has multiple leakage holes. There is a height difference between the bottom of the pressure plate and the bottom of the columns. At least one nylon mesh layer is laid on the pressure plate.

9. A soil leaching device according to claim 8, characterized in that, It also includes a detection device, which includes multiple moisture content sensors, multiple ORP sensors and a data collector. The multiple moisture content sensors and multiple ORP sensors are spaced apart along the height direction of the column and inserted into the soil filling area. The multiple moisture content sensors are electrically connected to one of the data collectors, and the multiple ORP sensors are electrically connected to another data collector.

10. A soil leaching device according to claim 9, characterized in that, The column is provided with multiple sampling holes at intervals along its height, and each sampling hole is fitted with a plug.

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