Underground water pollution source permeation simulation equipment

Abstract

The invention relates to the technical field of underground water pollution source permeation, in particular to underground water pollution source permeation simulation equipment which comprises a base platform, and a foundation supporting frame is fixedly mounted on one side of the top of the base platform; a blocking assembly is arranged above the foundation supporting frame and used for preventing the adjacent substance filling layers distributed in the direction perpendicular to the top of the base station from being fused with each other. A surrounding material assembly is arranged between every two adjacent blocking assemblies, the surrounding material assemblies are used for containing different types of material filling layers, a supporting frame is fixedly installed at the top end of the base table, and a sealing cover is assembled on the inner side of the supporting frame and used for blocking the blocking assemblies; partitioned accurate spraying is achieved through an independent switch valve, the permeation efficiency and authenticity are improved through a pressure pump, the dual functions of separation and water permeation of adjacent soil layers are achieved through packing cloth, meanwhile, convenient and interference-free sampling is achieved through multi-position threaded sealing sampling holes, and pollution simulation accuracy, experiment efficiency and operation convenience are comprehensively improved.

Description

Technical Field

[0001] This invention relates to the field of groundwater pollution source infiltration technology, specifically a groundwater pollution source infiltration simulation device. Background Technology

[0002] Groundwater is an important freshwater resource reserve, supporting drinking water supply, industrial and agricultural production, and ecological stability. However, with the advancement of industrialization and urbanization, industrial wastewater, agricultural non-point source pollution, and landfill leachate continue to infiltrate the ground, leading to increasingly serious groundwater pollution problems. Compared with surface water pollution, groundwater pollution is characterized by its strong concealment, slow migration, difficulty in treatment, and high cost. After pollutants enter the aquifer, they diffuse through multiple processes, threatening drinking water safety and human health, and damaging the ecosystem. Recalcitrant pollutants further exacerbate the difficulty of treatment. In the prevention and treatment of groundwater pollution, accurately grasping the infiltration patterns of pollution sources and the migration and transformation mechanisms of pollutants in underground media is the premise and core of formulating scientific prevention and control strategies, optimizing treatment plans, and evaluating treatment effects.

[0003] However, in groundwater pollution source infiltration simulation experiments, the liquid distribution process generally adopts a fixed global model, which cannot adapt to real scenarios such as local leakage and non-uniform diffusion of pollution sources. This results in a significant disconnect between the simulated working conditions and the actual pollution situation. This problem has been clearly mentioned in the research of related experimental devices such as closed mine pollutant simulation. Existing devices are difficult to replicate the complex pollution release patterns in the field due to their single liquid distribution method. The infiltration process mostly relies on natural infiltration, which not only has a long experimental cycle and high time cost, but also cannot replicate the deep high-pressure hydrogeological environment, making the simulation data have limited reference value for actual engineering. The study of seepage simulation in high-pressure water-rich areas shows that traditional natural infiltration simulation is difficult to reflect the real seepage characteristics of deep strata. At the same time, the sampling process has obvious shortcomings. Most devices require disassembly of equipment to complete sampling, which is not only cumbersome to operate, but also damages the existing infiltration environment and leads to data distortion. It is impossible to systematically obtain multi-soil layer migration data. This limitation is reflected in the research of sand box simulation experimental devices and three-dimensional pollution migration simulation systems. These combined issues make it difficult for existing technologies to produce reliable experimental results. Therefore, there is an urgent need for a penetration simulation technology solution that can adapt to complex scenarios, ensure experimental stability, simplify operation, and improve data reliability. Summary of the Invention

[0004] The purpose of this invention is to provide a groundwater pollution source infiltration simulation device to solve the problems mentioned in the background art above.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A groundwater pollution source infiltration simulation device includes a base, a foundation support frame fixedly installed on one side of the top of the base; a barrier component is provided above the foundation support frame, which is used to prevent adjacent material filling layers distributed along the direction perpendicular to the top of the base from merging with each other; a containment component is provided between adjacent barrier components, which is used to contain different types of material filling layers. A support frame is fixedly installed at the top of the base, and a cover is fitted inside the support frame to seal the barrier components.

[0006] Preferably, the barrier component and the enclosure component are arranged at intervals along a direction perpendicular to the top of the base. The barrier component consists of two clamps of the same shape, two clips, and a sealing cloth.

[0007] Preferably, each of the four outer corners of the clamp is fixedly connected with a mounting buckle, and the two clamps are fixedly connected by the cooperation of bolts and mounting buckles. The clamp strip is integrally formed with the inner wall of the clamp. The sealing cloth is sandwiched between two corresponding clamps.

[0008] Preferably, the material containment assembly includes a material containment frame, the top and bottom of which are respectively snapped into the inner cavity of the clamp and adapted to the corresponding clamp strips. The outer wall of the material containment frame is provided with a plurality of sampling holes. A threaded sleeve is fixedly connected to the material containment frame at the corresponding position of each sampling hole. A sealing sleeve is threadedly connected to the inner cavity of the threaded sleeve.

[0009] Preferably, each of the four corners of the outer wall of the enclosure frame is fixedly connected to an installation block, the top of the installation block is provided with an insertion hole, and the bottom of the installation block is fixedly connected to an insertion block.

[0010] Preferably, an electric lifting push rod is fixedly installed at the bottom of the support frame, the bottom end of the electric lifting push rod is fixedly connected to the top of the cover, and multiple sets of horizontal drain pipes are fixedly installed in the inner cavity of the cover, with one end of the drain pipe connected to a switch valve.

[0011] Preferably, a pollution source storage tank and a pressurizing pump are fixedly installed in the inner cavity of the base. The outer side of the pollution source storage tank is connected to the pump body through a conduit, and one end of the pump body is connected to a switching valve through a multi-port pipe.

[0012] Preferably, the bottom of the basic support frame is connected to a liquid outlet pipe for discharging the pollutant liquid, and the bottom of the liquid outlet pipe has several liquid outlet holes. One end of the pressurizing pump is connected to the cover through a pressurizing pipe.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. The design of each group of horizontally positioned drain pipes with an independent on / off valve allows for individual control of the spraying in each area. This enables precise simulation of complex pollution scenarios such as non-uniform distribution of pollution sources and localized leaks, overcoming the limitations of traditional equipment that cannot simulate complex actual pollution conditions through uniform spraying across the entire area. Simultaneously, the combination of the pressurized pump and the enclosed space rapidly drives the liquid infiltration from the pollution source, solving the problems of slow natural infiltration rates and long experimental cycles. It also simulates the high-pressure environment of deep groundwater, making the simulation process closer to actual geological conditions and significantly improving experimental efficiency and the reliability of results.

[0014] 2. The sealing fabric in the barrier component effectively prevents adjacent soil simulation layers from merging while allowing normal liquid infiltration through its surface permeable pores. This achieves both separation and permeability, ensuring the independence of soil properties in each layer and the continuity of the infiltration process. Simultaneously, the design of multiple sampling holes and threaded sealing structures on the outer wall of the containment frame allows for permeate sampling from different soil layers and areas without disassembling the equipment or disrupting the infiltration environment. This avoids interference with the experiment during sampling, systematically acquires migration data of pollution sources in each soil layer, provides comprehensive support for experimental analysis, and simplifies and speeds up the sampling operation, reducing the difficulty of experimental procedures. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings; Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective; Figure 3 This is a schematic diagram of the enclosure frame structure in this invention; Figure 4 This is a schematic diagram of the plug-in block structure in this invention; Figure 5 This is a schematic diagram of the clamp structure in this invention; Figure 6 This is a schematic diagram of the sealing fabric structure in this invention; Figure 7 This is a schematic diagram of the drain pipe structure in this invention.

[0016] Reference numerals in the attached drawings: 1. Base; 2. Foundation support frame; 3. Support frame; 4. Cover; 501. Clamp; 502. Clip; 503. Sealing cloth; 6. Mounting buckle; 701. Enclosing frame; 702. Threaded sleeve; 703. Sealing sleeve; 8. Mounting block; 9. Insertion block; 10. Electric lifting push rod; 11. Drain pipe; 12. Switch valve; 13. Pollution source storage tank; 14. Pump body; 15. Multi-port pipe; 16. Discharge pipe; 17. Booster pump; 18. Booster pipeline. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1: The core design goal of the local groundwater pollution source infiltration simulation equipment is to achieve flexible superposition and precise separation of different types of material filling layers through modular assembly structure, accelerate the infiltration process of pollution source liquid by pressurization drive, and complete the monitoring of infiltration in different soil layers through multi-location sampling structure; like Figure 1 - Figure 7 As shown, a groundwater pollution source infiltration simulation device includes a base 1, a foundation support frame 2 fixedly installed on one side of the top of the base 1; a barrier component is provided above the foundation support frame 2, which is used to prevent adjacent material filling layers distributed along the direction perpendicular to the top of the base 1 from merging with each other; a retaining component is provided between adjacent barrier components, which is used to hold different types of material filling layers. A support frame 3 is fixedly installed at the top of the base 1, and a cover 4 is assembled inside the support frame 3. The cover 4 is used to seal the barrier components.

[0019] The barrier components and the enclosure components are arranged at intervals along a direction perpendicular to the top of the base 1. The barrier components consist of two identical clamps 501, two clips 502, and a sealing cloth 503.

[0020] Each clamp 501 has a mounting buckle 6 fixedly connected to its four outer corners. The two clamps 501 are fixedly connected by bolts and mounting buckles 6. The clamp strip 502 is integrally formed with the inner wall of the clamp 501. The sealing cloth 503 is sandwiched between two corresponding clamps 501.

[0021] The material containment assembly includes a material containment frame 701. The top and bottom of the material containment frame 701 are respectively snapped into the inner cavity of the clamp 501 and are adapted to the corresponding clamp strip 502. The outer wall of the material containment frame 701 has several sampling holes. A threaded sleeve 702 is fixedly connected to the corresponding position of each sampling hole of the material containment frame 701. A sealing sleeve 703 is threadedly connected to the inner cavity of the threaded sleeve 702. Mounting blocks 8 are fixedly connected to the four corners of the outer wall of the material containment frame 701. The top of the mounting block 8 has an insertion hole, and the bottom of the mounting block 8 is fixedly connected to an insertion block 9.

[0022] Example 2: An electric lifting push rod 10 is fixedly installed at the bottom of the support frame 3. The bottom end of the electric lifting push rod 10 is fixedly connected to the top of the cover 4. Multiple sets of horizontal drain pipes 11 are fixedly installed in the inner cavity of the cover 4. One end of the drain pipe 11 is connected to the switch valve 12.

[0023] The inner cavity of the base 1 is fixedly installed with a pollution source storage tank 13 and a pressurizing pump 17. The outer side of the pollution source storage tank 13 is connected to the pump body 14 through a conduit. One end of the pump body 14 is connected to the switch valve 12 through a multi-port pipe 15. The bottom of the base support frame 2 is connected to an outlet pipe 16 for discharging the pollution source liquid. Several drainage holes are opened at the bottom of the drain pipe 11. One end of the pressurizing pump 17 is connected to the cover 4 through a pressurizing pipe 18.

[0024] Based on Examples 1 and 2, the working principle of the groundwater pollution source infiltration simulation device is as follows: First, the base 1 serves as the supporting foundation for the entire equipment. The bases are arranged alternately in a direction perpendicular to the top of the base 1, forming a layered and fillable spatial structure.

[0025] The assembly of the barrier component requires the initial combination of two identical clamps 501. Since the clamp strip 502 is integrally formed with the inner wall of the clamp 501, the sealing cloth 503 is first clamped between the two clamps 501. The clamp strip 502 is used to limit the edge of the sealing cloth 503, preventing displacement. Then, using the mounting buckles 6 fixed at the four corners of the two clamps 501, bolts are passed through the mounting buckles 6 to achieve a tight connection between the two clamps 501, ensuring the sealing cloth 503 is stably held between them, forming a barrier structure that combines separation and permeability. It should be noted that the multiple permeable holes on the surface of the sealing cloth 503 are key to achieving the dual functions of separating adjacent soil layers and allowing liquid infiltration. This prevents the particles of adjacent filling layers from mixing while providing channels for the vertical infiltration of contaminated liquids. The top and bottom of the retaining frame 701 are respectively inserted into the inner cavity of the clamps 501 of the upper and lower barrier components, and the end of the retaining frame 701 is precisely matched with the clamp strip 502 on the inner wall of the clamp 501. The clamp strip 502 further limits and fixes the retaining frame 701 to prevent the retaining frame 701 from shifting during the filling of soil or pressurization process.

[0026] Meanwhile, adjacent retaining frames 701 are quickly fixed together via mounting blocks 8: the insertion block 9 at the bottom of the upper retaining frame 701 is inserted into the insertion hole of the mounting block 8 at the top of the lower retaining frame 701, forming a vertical positioning fixation; the bottom retaining frame 701 is fixed at the bottom by inserting the insertion block 9 into the insertion hole on the outside of the base support frame 2. This assembly method requires no complicated tools, enabling rapid assembly and disassembly, and greatly facilitating subsequent adjustments to the stacking order of the material filling layers.

[0027] The core advantage of this design lies in its ability to freely adjust the stacking order and thickness of different types of material filling layers according to simulation requirements, accurately reproducing complex geological structures. First, the inner cavity of the bottommost containment frame 701 is filled with the first type of soil simulation material (such as sandy soil, silty soil, etc.). During the filling process, the filling thickness can be controlled according to experimental requirements to ensure uniform density of the material filling layer.

[0028] After the bottom layer of soil is filled, a barrier component is assembled on top of the retaining frame 701. This component is secured by clamps 501 that engage with the retaining frame 701. At this point, the sealing fabric 503 of the barrier component precisely covers the top of the bottom layer of material, forming the first layer of separation. Subsequently, the second retaining frame 701 is clamped into the clamps 501 above the barrier component, and a second type of soil simulation material is filled into the second retaining frame 701. This process is repeated to complete the stacking of multiple layers of different types of materials. Throughout the filling process, each layer of soil simulation material is confined within its corresponding retaining frame 701 and separated from adjacent soil layers by the sealing fabric 503 of the barrier component. This effectively prevents the different material layers from merging during filling or subsequent infiltration, ensuring the independence of the soil properties of each layer.

[0029] It is important to note that the topmost barrier component does not have a sealing cloth 503 installed. This design provides a channel for the contaminant liquid to enter the material filling layer, allowing the subsequently transported contaminant liquid to directly contact the topmost material filling layer and ensuring the smooth start of the infiltration process.

[0030] After the material filling layer is completed, the electric lifting push rod 10 installed inside the support frame 3 at the top of the base 1 is activated. The electric lifting push rod 10 drives the bottom-fixed cover 4 to descend vertically until the bottom of the cover 4 is in close contact with the top of the clamp 501 of the uppermost barrier component. At this time, the cover 4, the clamps 501 of each barrier component, the surrounding frame 701, and the sealing strips set at the top and bottom of the surrounding frame 701 together form a closed permeation space, effectively preventing leakage of the contaminant liquid during the pressurized permeation process and ensuring the stability of the pressurization effect.

[0031] After sealing, the relevant pipeline valves are first opened. The contaminant storage tank 13, fixed in the inner cavity of the base 1, is connected to the pump body 14 through a conduit. After the pump body 14 is started, the contaminant liquid in the contaminant storage tank 13 is extracted and distributed through the multi-port pipe 15 to multiple sets of horizontally placed drain pipes 11 that are connected to the inner cavity of the cover 4. The contaminant liquid is evenly sprayed onto the surface of the uppermost material filling layer through several drain holes opened at the bottom of the drain pipe 11, completing the initial distribution of the contaminant liquid.

[0032] Each set of horizontally placed drain pipes 11 is connected to an independent switch valve 12. By individually controlling the opening and closing of each switch valve 12, precise spraying of different areas can be achieved. When it is necessary to spray a specific area of ​​the top soil simulation layer, simply open the switch valve 12 connected to the drain pipe 11 of the corresponding area and close the switch valves 12 of other areas. The pollutant liquid delivered by the pump body 14 will be sprayed only through the drain pipe 11 and drain hole of that area. If it is necessary to achieve simultaneous spraying or staged spraying of multiple different areas, it can be flexibly achieved by combining and controlling the opening and closing states of each switch valve 12. This design greatly improves the flexibility of pollutant spraying and can simulate complex pollution situations such as non-uniform distribution of pollutants and local leakage in actual scenarios. To accelerate the infiltration of the contaminated liquid into each soil layer, a pressurization pump 17 inside the base 1 is activated. The pump 17 injects high-pressure gas into the enclosed space formed by the enclosure 4 through a pressurization pipe 18, increasing the air pressure within the enclosed space. Under pressure, the contaminated liquid is rapidly forced into the top layer of material filling and then permeates sequentially into the lower layers through the permeable pores of the sealing fabric 503. This pressurized drive overcomes the limitation of slow natural infiltration rates, enabling multi-layer infiltration simulation to be completed in a shorter time. Furthermore, the high-pressure environment can simulate the pressure conditions of deep groundwater, making the simulation results closer to the actual geological environment.

[0033] During the pressurized infiltration of pollutant source liquid, multiple sampling holes on the retaining frame 701 can be used to sample the permeate from different soil layers and locations, accurately monitoring the migration patterns and infiltration effects of the pollutant source in each soil layer. The sampling holes are evenly distributed along the retaining frame 701, covering different areas of the entire material filling layer and ensuring comprehensive sampling.

[0034] When sampling is required, simply unscrew the sealing sleeve 703 fixed at the corresponding position of the sampling hole. Since the sealing sleeve 703 and the threaded sleeve 702 are threadedly connected, the sampling hole will be exposed after unscrewing. Then, insert a long tube (such as a sampling tube, sampling needle, etc.) into the surrounding frame 701 through the inner cavity of the threaded sleeve 702, reaching the specified depth of the target material filling layer, and the permeate sample at that location can be collected. After sampling is completed, simply screw the sealing sleeve 703 back into the threaded sleeve 702 to reseal the sampling hole, without affecting the continuation of the subsequent permeation process.

[0035] By taking multiple samples at different time points and through different sampling holes in different enclosure frames 701, the infiltration rate, migration path, and concentration variation of the pollutant liquid in different types of material filling layers can be systematically analyzed, providing detailed experimental data for studying the migration mechanism of groundwater pollution. Simultaneously, excess permeate generated during the infiltration process can be discharged through the outlet pipe 16 connected to the bottom of the foundation support frame 2, preventing permeate accumulation at the bottom of the equipment from affecting experimental results.

[0036] This equipment utilizes a modular assembly structure to allow for flexible stacking and rapid replacement of different material filling layers. It employs 503 sealing fabric to effectively separate adjacent soil layers and facilitate liquid infiltration. A pressurization system and a closed structure accelerate the infiltration process, while multi-location sampling holes enable comprehensive infiltration monitoring. The entire process allows for flexible adjustment of the stacking order, type, and thickness of the material filling layers according to experimental needs, making it suitable for simulating groundwater pollution source infiltration under various complex geological conditions. Furthermore, the rapid assembly and disassembly design reduces the difficulty of operation, while the multi-location sampling design enhances the comprehensiveness and accuracy of experimental data.

[0037] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A groundwater pollution source infiltration simulation device, comprising a base (1), characterized in that, A base support frame (2) is fixedly installed on one side of the top of the base (1); a barrier component is provided above the base support frame (2), which is used to prevent adjacent material filling layers distributed along the direction perpendicular to the top of the base (1) from merging with each other; a surrounding material component is provided between adjacent barrier components, which is used to hold different types of material filling layers. A support frame (3) is fixedly installed on the top of the base (1), and a cover (4) is assembled on the inner side of the support frame (3). The cover (4) is used to seal the barrier components.

2. The groundwater pollution source infiltration simulation device according to claim 1, characterized in that, The barrier component and the enclosure component are arranged at intervals along a direction perpendicular to the top of the base (1). The barrier component consists of two clamps (501) of the same shape, two clips (502) and a sealing cloth (503).

3. The groundwater pollution source infiltration simulation device according to claim 2, characterized in that, Each of the four outer corners of the clamp (501) is fixedly connected with a mounting buckle (6). The two clamps (501) are fixedly connected by bolts and mounting buckles (6). The clip (502) is integrally formed with the inner wall of the clamp (501). The sealing cloth (503) is sandwiched between the two corresponding clamps (501).

4. The groundwater pollution source infiltration simulation device according to claim 1, characterized in that, The material containment assembly includes a material containment frame (701), the top and bottom of which are respectively snapped into the inner cavity of the clamp (501) and adapted to the corresponding clamp strip (502). The outer wall of the material containment frame (701) is provided with several sampling holes. A threaded sleeve (702) is fixedly connected to the corresponding position of each sampling hole of the material containment frame (701). A sealing sleeve (703) is threadedly connected to the inner cavity of the threaded sleeve (702).

5. A groundwater pollution source infiltration simulation device according to claim 4, characterized in that, The four corners of the outer wall of the enclosure frame (701) are fixedly connected with mounting blocks (8), the top of the mounting block (8) is provided with a plug hole, and the bottom of the mounting block (8) is fixedly connected with a plug block (9).

6. The groundwater pollution source infiltration simulation device according to claim 1, characterized in that, An electric lifting push rod (10) is fixedly installed at the bottom of the support frame (3). The bottom end of the electric lifting push rod (10) is fixedly connected to the top of the cover (4). Multiple sets of horizontal drain pipes (11) are fixedly installed in the inner cavity of the cover (4). One end of the drain pipe (11) is connected to the switch valve (12).

7. The groundwater pollution source infiltration simulation device according to claim 1, characterized in that, The inner cavity of the base (1) is fixedly installed with a pollution source storage tank (13) and a pressurizing pump (17). The outer side of the pollution source storage tank (13) is connected to the pump body (14) through a conduit. One end of the pump body (14) is connected to the switch valve (12) through a multi-port pipe (15).

8. A groundwater pollution source infiltration simulation device according to claim 7, characterized in that, The bottom of the basic support frame (2) is connected to an outlet pipe (16) for discharging the liquid from the pollution source. The bottom of the outlet pipe (11) is provided with several outlet holes. One end of the pressurizing pump (17) is connected to the cover (4) through a pressurizing pipe (18).

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