Groundwater sample collecting device for geological environment monitoring

Abstract

The invention discloses an underground water sample collecting device for geological environment monitoring, which belongs to the technical field of geological environment monitoring and comprises a vertical frame and a bottom collecting box. A driving shaft and a driven shaft I are rotationally mounted at the top of the frame, and a plurality of windward covers are circumferentially arranged on the driving shaft and coaxially fixed with a driving chain wheel I; the driven shaft I and the driven chain wheel I are in transmission through a tensioning chain wheel I and a chain I; the side surface of the frame is connected with a sampling pipe (communicated with an underground water well) and a sample discharging pipe (communicated with the top of the collecting box); the bottom of the first driven shaft is connected with a piston rod through a driven disc and an eccentric right-angle base to drive the piston disc to axially reciprocate. During work, wind blows the windward cover to rotate, the first driven shaft is driven to rotate through transmission of the chain wheel and the chain, the driven disc pushes the piston disc to reciprocate through the piston rod, automatic underground water sampling is achieved, no generator or external power source is needed in the whole process, and the device is suitable for field environments without power grids, saves manual operation and is convenient and efficient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of geological environment monitoring, in particular to a geological environment monitoring underground water sample collection device. BACKGROUND

[0002] In geological environment monitoring, the collection of underground water samples is a key link for analyzing regional hydrogeological conditions, pollutant distribution and ecological impact. In the prior art, underground water sample collection mainly relies on electric water pumps, which drive the water pump through a generator or external power supply to pump underground water out of the well and collect it. However, this method has the following problems: Strong energy dependence: Lack of stable power supply in outdoor or remote areas, need to carry a generator or long-distance wiring, inconvenient operation and high cost; High equipment complexity: Electric water pumps need to be matched with circuits, control modules, etc., which are easily disturbed by environmental factors such as humidity and dust, and are difficult to maintain; Insufficient flexibility: dependent on fixed power supply or fuel generator, difficult to carry out rapid sampling in mountainous, desert and other terrains without traffic conditions. SUMMARY

[0003] The first technical problem to be solved by the present application is to provide a geological environment monitoring underground water sample collection device, which does not require external energy, has a simple structure and is suitable for outdoor environments. Specifically, wind power is used to replace traditional electric power to achieve automatic and energy-free collection of underground water samples in the field environment.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions: A geological environment monitoring underground water sample collection device, comprising a vertical frame and a collection box mounted at the bottom of the vertical frame; The core improvement point is that two vertical main shafts and a driven shaft one are rotatably installed on the top of the vertical frame, a plurality of windward covers are fixedly arranged on the main shaft in a circumferential array, a main sprocket one is coaxially fixed on the main shaft, a driven sprocket one is coaxially fixed on the driven shaft one and located in the same plane as the main sprocket one, and a tension sprocket one is installed on the vertical frame beside the main sprocket, wherein the main sprocket, the driven sprocket one and the tension sprocket one are meshed and transmitted by a chain one. A sampling cylinder is fixedly installed on the top of the vertical frame, a piston disc capable of moving axially in the sampling cylinder is sealingly installed inside the sampling cylinder, a sampling pipe and a sample discharge pipe are connected to the side surface of the sampling cylinder, wherein the sampling pipe directly penetrates into the underground water well, and the sample discharge pipe directly penetrates into the top of the collection box. A driven disc is coaxially fixed on the bottom of the driven shaft one, a piston rod is eccentrically connected to the bottom of the driven disc through a right-angle seat, the piston rod is connected to the side surface of the piston disc, and the piston rod moves axially and reciprocally in the sampling cylinder along with the rotation of the driven disc.

[0005] By adopting the above scheme, by wind blowing the rotation of the wind shield, under the transmission of the driving sprocket, the driven sprocket, the tension sprocket and the chain, the reciprocating motion of the piston rod is converted by the chain, and finally the periodic sampling of underground water is completed by the sampling cylinder. This process does not require a generator or external power supply, is suitable for field environments without power grid coverage, and does not require manual operation, is convenient and labor-saving when applied.

[0006] As a preferred embodiment of the geological environment monitoring underground water sample collection device, in order to facilitate the disassembly of the wind shield and adjust the angle of the wind shield, a plurality of circumferentially arranged rotating seats are fixed on the driving shaft, each wind shield is disassembled and fixed directly below the rotating seat, the wind shield can be disassembled in the case of no sampling collection, and the wind angle of the wind shield can be adjusted according to the actual wind direction, so that the wind energy can be maximized to improve the utilization rate of wind energy.

[0007] As a preferred embodiment of the geological environment monitoring underground water sample collection device, in order to optimize the wind force distribution, the cover body of the wind shield is designed as an arc cover body, and the cover surface of all wind shields is convex or concave along the same circumferential direction of the driving shaft. The arc design can optimize the wind force distribution, reduce wind resistance loss, and improve the rotation efficiency of the driving shaft.

[0008] As a preferred embodiment of the geological environment monitoring underground water sample collection device, in order to further control the ordered flow of water samples, the sampling pipe and the sample discharge pipe are respectively connected with the inside of the sampling cylinder through one-way valves; the one-way valve at the connection of the sampling pipe only controls the one-way flow of fluid into the sampling cylinder (i.e. underground water can only flow in, but cannot flow out); the one-way valve at the connection of the sample discharge pipe only controls the one-way flow of fluid out of the sampling cylinder (i.e. the water in the sampling cylinder can only be discharged into the collection box, but cannot flow back).

[0009] As a preferred embodiment of the geological environment monitoring underground water sample collection device, in order to filter impurities in the water sample, a filter cartridge vertically arranged and not coaxially communicated with the sampling pipe is connected to the pipe body of the sampling pipe, the filter cartridge is fixed to the side of the collection box, a horizontally arranged filter plate is installed in the filter cartridge, and the filter plate can effectively intercept impurities.

[0010] As a preferred embodiment of the geological environment monitoring underground water sample collection device, in order to facilitate the collection of impurities, a horizontally arranged blowdown cylinder is connected to one side of the filter cartridge, and a blowdown cover is detachably installed at the opening of the blowdown cylinder; a pollution guide plate inclined and lowered towards the blowdown cylinder is fixed in the filter cartridge, and a flow port away from the blowdown cylinder is formed in the pollution guide plate; when sampling through the sampling pipe, the filter plate in the filter cartridge intercepts impurities, the intercepted impurities are guided to the blowdown cylinder by the pollution guide plate, and the pollution cleaning brush automatically cleans the filter plate to ensure the smoothness of the sampling pipeline.

[0011] As a preferred embodiment of the geological environment monitoring underground water sample collection device, in order to prevent external collision, a protective frame located at the bottom of the vertical frame and completely surrounding the collection box is fixed around the collection box; and a counterweight base is fixed at the bottom of the collection box, which can enhance the wind stability of the device.

[0012] As a preferred embodiment of the geological environment monitoring underground water sample collection device, a pressure relief port is opened at the top of the collection box, which can balance the internal air pressure and avoid the over-high pressure in the box caused by the sampling cylinder, and a sampling faucet is connected to the side of the bottom of the collection box, which facilitates direct extraction of the collected underground water sample.

[0013] The second technical problem to be solved by the present application is to provide a geological environment monitoring underground water sample collection device, which further cleans the impurities accumulated on the bottom of the filter plate using wind power driven on the basis of wind power, thereby ensuring the smoothness of the sampling pipeline.

[0014] To achieve the above-mentioned purposes, the following technical solutions are adopted in the present application: On the basis of the above-mentioned scheme, a vertical driven shaft two is rotatably installed at the top of the vertical frame, a driving sprocket two is coaxially fixed on the driving shaft, a driven sprocket one is coaxially fixed on the driven shaft two and located in the same plane as the driving sprocket two, and a tension sprocket two is installed on the vertical frame beside the driving shaft, wherein the driving sprocket, the driven sprocket two and the tension sprocket two are meshed and transmitted by a chain two. The bottom of the driven shaft two is coaxially fixed with a cleaning rod, the bottom of the cleaning rod is coaxially connected to the inside of the filter cylinder, and the bottom of the cleaning rod is connected with a cleaning brush close to the bottom of the filter plate.

[0015] By adopting the above-mentioned scheme, the wind-driven wind shield is rotated by wind power, and under the transmission of the driving sprocket two, the driven sprocket two, the tension sprocket two and the chain two, the rotation of the chain two is converted into the rotation of the cleaning rod, and the bottom of the filter plate is continuously cleaned by the rotating cleaning brush, thereby ensuring the smoothness of the sampling pipeline.

[0016] As a preferred embodiment of the geological environment monitoring underground water sample collection device, the driven sprocket one and the driven sprocket two are both multi-sprocket assemblies, which include a plurality of coaxially fixed sprockets with different diameters, and can switch the transmission ratio or serve as backup transmission according to needs.

[0017] The present application has the following beneficial effects: 1. Pure mechanical drive, no energy consumption: the wind-driven wind shield is rotated by wind power, and under the transmission of the driving sprocket one, the driven sprocket one, the tension sprocket one and the chain one, the reciprocating motion of the piston rod is converted by the transmission of the chain one, and finally the periodic sampling of underground water is completed by the sampling cylinder, which does not require a generator or external power supply and is suitable for field environments without power grid coverage. 2. Automatic sampling: The wind-driven process is continuous, and the piston reciprocating motion realizes automatic suction of groundwater (sampling pipe) and discharge into the collection box (sampling pipe), without manual operation; 3. Filtration and self-cleaning: The wind-driven rotating wind shield, driven by the main sprocket 2, driven sprocket 2, tension sprocket 2 and chain 2, is converted into the rotation of the cleaning rod by chain 2, and the bottom of the filter plate is continuously cleaned by the rotating cleaning brush, thereby ensuring the smoothness of the sampling pipe; 4. Strong adaptability: The angle of the wind shield can be adjusted to match different wind directions, and the counterweight base and the protective frame improve outdoor stability, suitable for mountainous, desert and other terrains. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 is a perspective view of the whole groundwater sample collection device for geological environment monitoring; Figure 2 is a perspective view of the upper half of the vertical frame; Figure 3 is a perspective view of the upper half of the vertical frame; Figure 2 is a perspective view of the upper half of the vertical frame; Figure 4 is a perspective view of the upper half of the vertical frame; Figure 2 is a perspective view of the upper half of the vertical frame; Figure 5 is a perspective view of the upper half of the vertical frame; Figure 3 is a perspective view of the upper half of the vertical frame; Figure 6 is a perspective view of the upper half of the vertical frame; Figure 7 is a perspective view of the upper half of the vertical frame; Figure 8 is a perspective view of the upper half of the vertical frame; Figure 9 is a perspective view of the upper half of the vertical frame; Figure 1 ; Figure 10 is a perspective view of the upper half of the vertical frame; Figure 2 ; Fig. 1 is a vertical frame; Fig. 2 is a collection box; Fig. 3 is a driving shaft; Fig. 4 is a driven shaft one; Fig. 5 is a wind cover; Fig. 6 is a driving sprocket one; Fig. 7 is a driven sprocket one; Fig. 8 is a tension sprocket one; Fig. 9 is a sampling cylinder; Fig. 10 is a piston disc; Fig. 11 is a sampling pipe; Fig. 12 is a sample discharge pipe; Fig. 13 is a driven disc; Fig. 14 is a right-angle seat; Fig. 15 is a piston rod; Fig. 16 is a rotating seat; Fig. 17 is a filter cylinder; Fig. 18 is a filter plate; Fig. 19 is a waste discharge cylinder; Fig. 20 is a waste discharge cover; Fig. 21 is a waste guide plate; Fig. 22 is a flow port; Fig. 23 is a driving sprocket two; Fig. 24 is a driven shaft two; Fig. 25 is a driven sprocket two; Fig. 26 is a tension sprocket two; Fig. 27 is a waste cleaning rod; Fig. 28 is a waste cleaning brush; Fig. 29 is a protective frame; Fig. 30 is a counterweight base; Fig. 31 is a pressure relief port; Fig. 32 is a sampling faucet. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0021] As shown in the drawings, Figures 1 to 3 A geological environment monitoring groundwater sample collection device for collecting groundwater for regular water quality analysis, which comprises a vertical frame 1 and a collection box 2 installed at the bottom of the vertical frame 1; two vertically arranged driving shafts 3 and driven shafts one 4 are rotatably installed at the top of the vertical frame 1, a plurality of circumferentially arrayed wind covers 5 are fixed on the driving shaft 3, a driving sprocket one 6 is coaxially fixed on the driving shaft 3, a driven sprocket one 7 is coaxially fixed on the driven shaft one 4 and located in the same plane as the driving sprocket one 6, and a tension sprocket one 8 is installed on the vertical frame 1 beside the driving shaft 3, wherein the driving sprocket, the driven sprocket one 7 and the tension sprocket one 8 are meshed and transmitted by a chain one (the chain one is omitted in the drawings due to the blurring of the drawing).

[0022] As shown in the drawings, Figure 3 , Figure 5As shown, the top of the vertical frame 1 is also fixedly installed with a sampling cylinder 9, the inside of the sampling cylinder 9 is sealingly installed with a piston disc 10 capable of moving axially along the sampling cylinder 9, the side of the sampling cylinder 9 is connected with a sampling pipe 11 and a sample discharge pipe 12, wherein the sampling pipe 11 is directly connected to the underground water well, and the sample discharge pipe 12 is directly connected to the top of the collection box 2; the bottom of the driven shaft 4 is coaxially fixed with a driven disc 13, the bottom of the driven disc 13 is eccentrically connected with a piston rod 15 through a right-angle seat 14, the piston rod 15 is connected with the side of the piston disc 10, and the piston rod 15 reciprocates along with the rotation of the driven disc 13 and the piston disc 10 in the sampling cylinder 9. The wind drives the rotation of the wind shield 5, and under the transmission of the driving sprocket 6, the driven sprocket 7, the tension sprocket 8 and the chain 1, the reciprocating motion of the piston rod 15 is converted by the chain 1, and finally the periodic sampling of underground water is completed through the sampling cylinder 9. This process does not require a generator or external power supply, is suitable for field environments without power grid coverage, and does not require manual operation, so it is convenient and labor-saving when applied.

[0023] As shown in Figure 2 In order to facilitate the disassembly of the wind shield 5 and adjust the angle of the wind shield 5, two circumferentially arrayed rotation seats 16 are fixed on the driving shaft 3, each wind shield 5 is fixed below the rotation seat 16 by bolts, the wind shield 5 can be removed in the case of no sampling collection, and the wind angle of the wind shield 5 can be adjusted according to the actual wind direction to maximize the capture of wind energy and improve the utilization rate of wind energy.

[0024] As shown in Figure 2 In order to optimize the distribution of wind force, the cover body of the wind shield 5 is designed as an arc cover body, and the cover surface of all wind shields 5 is convex or concave in the same circumferential direction of the driving shaft 3, wherein the arc design can optimize the distribution of wind force, reduce wind resistance loss, and improve the rotation efficiency of the driving shaft 3.

[0025] As shown in Figure 3 In order to further control the orderly flow of water samples, the sampling pipe 11 and the sample discharge pipe 12 are respectively connected with the inside of the sampling cylinder 9 through one-way valves; the one-way valve at the connection of the sampling pipe 11 only controls the one-way flow of fluid into the sampling cylinder 9 (i.e. underground water can only flow in, but cannot flow out); the one-way valve at the connection of the sample discharge pipe 12 only controls the one-way flow of fluid out of the sampling cylinder 9 (i.e. the water in the sampling cylinder 9 can only be discharged into the collection box 2, but cannot flow back).

[0026] As shown in Figures 6 to 7 In order to filter impurities in the water sample, a filter cylinder 17 is connected to the pipe body of the sampling pipe 11 and is vertically arranged and non-coaxially communicated with the sampling pipe 11, the filter cylinder 17 is fixed to the side of the collection box 2, a filter plate 18 is installed in the filter cylinder 17 and is horizontally arranged, and the filter plate 18 can effectively intercept impurities.

[0027] As shown inFigures 6 to 7 As shown, in order to facilitate the collection of impurities, a horizontal pollution discharge cylinder 19 is connected to one side of the filter cylinder 17, and a pollution discharge cover 20 is detachably installed at the opening of the pollution discharge cylinder 19 by screwing. A pollution guide plate 21 is fixed in the filter cylinder 17 and inclined downward to the position of the pollution discharge cylinder 19. The pollution guide plate 21 is provided with a flow port 22 away from the position of the pollution discharge cylinder 19. When sampling through the sampling pipe 11, the impurities are intercepted by the filter plate 18 in the filter cylinder 17 and guided to the pollution discharge cylinder 19 by the pollution guide plate 21. The pollution cleaning brush 28 automatically cleans the filter plate 18 to ensure the smoothness of the sampling pipe 11.

[0028] As shown in Figure 2 , Figure 4 , Figure 8 , the top of the vertical frame 1 is also rotatably installed with a vertical driven shaft two 24. The driven shaft two 24 is coaxially fixed with a driven sprocket one 7 located in the same plane as the driven sprocket two 25. The driven shaft two 24 is also coaxially fixed with a tension sprocket two 26 located on the vertical frame 1. The driven sprocket, the driven sprocket two 25 and the tension sprocket two 26 are engaged and transmitted by a chain two (the chain two is omitted in the figure due to unclear drawing).

[0029] As shown in Figure 8 , the bottom of the driven shaft two 24 is coaxially fixed with a pollution cleaning rod 27, and the bottom of the pollution cleaning rod 27 is coaxially connected to the inside of the filter cylinder 17. The bottom of the pollution cleaning rod 27 is connected with a pollution cleaning brush 28 close to the bottom surface of the filter plate 18. The wind drives the rotation of the wind shield 5, and under the transmission of the driven sprocket two 25, the tension sprocket two 26 and the chain two, the rotation of the pollution cleaning rod 27 is converted by the chain two. The rotating pollution cleaning brush 28 continuously cleans the bottom of the filter plate 18, thereby ensuring the smoothness of the sampling pipe 11.

[0030] As shown in Figures 3 to 4 , the driven sprocket one 7 and the driven sprocket two 25 are both multi-sprocket assemblies, which include three sprockets fixed coaxially and with different diameters. The transmission ratio can be switched according to the needs or used as a backup transmission.

[0031] As shown in Figures 9 to 10 , in order to prevent external collision, a protective frame 29 is fixed around the collection box 2 and located at the bottom of the vertical frame 1, which completely surrounds the collection box 2. A counterweight base 30 is fixed at the bottom of the collection box 2, which can enhance the wind stability of the device.

[0032] As shown in Figures 9 to 10 , a pressure relief port 31 is provided at the top of the collection box 2 to balance the internal pressure and avoid excessive pressure in the box due to sampling of the sampling cylinder 9. A sampling faucet 32 is connected to the side of the bottom of the collection box 2 for direct extraction of the collected groundwater sample.

[0033] As Figures 1 to 10 shown, the working principle of the present application is as follows: Wind-driven principle: when the natural wind blows to the wind cover 5, the arc design of the wind cover 5 converts the wind power into rotating torque, driving the driving shaft 3 to rotate around the vertical axis. The driving shaft 3 drives the driven sprocket one 7 and the driven shaft one 4 to rotate synchronously through the coaxially fixed driving sprocket one 6 and the chain one. At the same time, the driving sprocket two 23 on the driving shaft 3 drives the driven sprocket two 25 and the driven shaft two 24 to rotate through the chain two, wherein the driven sprocket one 7 and two are multi-sprocket assemblies, which can select sprockets with different diameters to match the rotating speed according to the transmission requirements.

[0034] Groundwater sampling principle: when the wind drives, the driven disc 13 at the bottom of the driven shaft one 4 rotates with the shaft, and the piston rod 15 connected eccentrically through the right-angle seat 14 drives the piston disc 10 to reciprocate in the sampling cylinder 9, forming a negative pressure in the sampling cylinder 9, and the groundwater is sucked into the sampling cylinder 9 through the sampling pipe and then is pressed into the collection box 2 through the sampling pipe 12.

[0035] Filtering and decontamination principle: when the groundwater enters the filter cylinder 17 through the sampling pipe 11, the dirt and other impurities are intercepted by the filter plate 18 and slide along the decontamination plate 21 to the decontamination cylinder 19. At the same time, when the wind drives, the decontamination rod 27 at the bottom of the driven shaft two 24 drives the decontamination brush 28 to rotate, scraping off the dirt on the surface of the filter plate 18, maintaining the smoothness of the sampling pipe 11, and reducing the blockage.

[0036] Sample extraction principle: the groundwater stored in the collection box 2 can be directly extracted through the sampling faucet 32 on the side of the bottom, and the top pressure relief port 31 balances the air pressure in the box when the sampling cylinder 9 discharges the sample, preventing the discharge from being blocked due to excessive pressure.

[0037] The above is only a preferred embodiment of the present application and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A groundwater sample collection device for geological environment monitoring, comprising a vertical frame and a collection box installed at the bottom of the vertical frame; Its features are: The top of the vertical frame is rotatably mounted with two vertically arranged drive shafts and driven shaft one. Multiple circumferentially arrayed wind shields are fixed on the drive shafts. A drive sprocket one is also coaxially fixed on the drive shafts. A driven sprocket one is coaxially fixed on the driven shaft one and located on the same plane as the drive sprocket one. A tension sprocket one located on the vertical frame is also installed on one side of the drive shafts. The drive sprocket, driven sprocket one, and tension sprocket one are driven by a chain meshing transmission. A sampling tube is also fixedly installed on the top of the vertical frame. A piston disc that can move along the axial direction of the sampling tube is sealed inside the sampling tube. A sampling pipe and a discharge pipe are connected to the side of the sampling tube. The sampling pipe is directly connected to the groundwater well, and the discharge pipe is directly connected to the top of the collection box. The driven shaft is coaxially fixed to the bottom of the driven disk. The bottom of the driven disk is eccentrically connected to a piston rod via a right-angle seat. The piston rod is connected to the side of the piston disk. As the driven disk rotates, the piston disk moves axially back and forth inside the sampling cylinder.

2. The groundwater sample collection device for geological environment monitoring according to claim 1, characterized in that: The drive shaft is also fixed with multiple circumferentially arrayed rotating seats, and each wind shield is detached and fixed directly below the rotating seat.

3. The groundwater sample collection device for geological environment monitoring according to claim 1, characterized in that: The windshield is an arc-shaped cover, and the surface of all windshields is raised or recessed along the same circumferential direction of the drive shaft.

4. The groundwater sample collection device for geological environment monitoring according to claim 1, characterized in that: The sampling tube and the discharge tube are respectively connected to the inside of the sampling cylinder through one-way valves; wherein the one-way valve at the connection of the sampling tube only controls the fluid to flow unidirectionally into the sampling cylinder, and the one-way valve at the connection of the discharge tube only controls the fluid to flow unidirectionally out of the sampling cylinder.

5. The groundwater sample collection device for geological environment monitoring according to claim 1, characterized in that: The sampling tube is also connected to a vertically arranged filter cylinder that is not coaxially connected to the sampling tube. The filter cylinder is fixed to the side of the collection box, and a horizontally arranged filter plate is installed inside the filter cylinder.

6. The groundwater sample collection device for geological environment monitoring according to claim 5, characterized in that: A horizontally arranged drain pipe is connected to one side of the filter cylinder, and a drain cover is detachably installed at the opening of the drain pipe. The filter cylinder is fixed with a guide plate that is inclined and lowered towards the location of the sewage discharge cylinder, and the guide plate has a flow port that is away from the location of the sewage discharge cylinder.

7. The groundwater sample collection device for geological environment monitoring according to claim 5, characterized in that: The top of the vertical frame is also rotatably mounted with a vertically arranged driven shaft two. A driving sprocket two is coaxially fixed on the driving shaft. A driven sprocket one is coaxially fixed on the driven shaft two and located on the same plane as the driving sprocket two. A tension sprocket two located on the vertical frame is also installed on one side of the driving shaft. The driving sprocket, the driven sprocket two, and the tension sprocket two are driven by a chain two meshing. A cleaning rod is coaxially fixed to the bottom of the driven shaft 2. The bottom of the cleaning rod is coaxially connected to the inside of the filter cylinder. A cleaning brush close to the bottom surface of the filter plate is connected to the bottom of the cleaning rod.

8. The groundwater sample collection device for geological environment monitoring according to claim 7, characterized in that: Both driven sprocket one and driven sprocket two are multi-sprocket assemblies, which include multiple coaxial fixed sprockets with different diameters.

9. The groundwater sample collection device for geological environment monitoring according to claim 1, characterized in that: The collection box is surrounded by a protective frame located at the bottom of the vertical frame and completely enclosing the collection box. A counterweight base is fixed to the bottom of the collection box.

10. The groundwater sample collection device for geological environment monitoring according to claim 1, characterized in that: The top of the collection box is equipped with a pressure relief port, and the bottom side of the collection box is connected to a sampling tap.

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