Groundwater pollution assessment sampling device in mining areas

Abstract

The present invention provides a mining area groundwater pollution assessment sampling device, including a frame, a sampling tank, a vacuum pump, a water pump, a driving assembly, and a controller; the frame is provided with a lifting joint; the sampling tank is rotatably connected to the frame and is provided with a first elastic valve at one end and a second elastic valve at the other end; the negative pressure pipeline of the vacuum pump is connected with a first electromagnetic valve; the drainage pipe of the water pump is connected with a second electromagnetic valve; the driving assembly is used to drive the sampling tank to rotate so that the washing water shakes and flushes the inner wall of the sampling tank; wherein, when the lifting joint and the first elastic valve are connected, the vacuum pump vacuumizes the sampling tank through the opened first electromagnetic valve; when the target vacuum degree is reached in the sampling tank, the first electromagnetic valve is closed, and the water pump extracts water samples into the sampling tank through the opened second electromagnetic valve. The mining area groundwater pollution assessment sampling device provided by the present invention can improve the groundwater sampling efficiency and the groundwater pollution assessment accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of geological environment detection, and in particular relates to a groundwater pollution assessment sampling device for a mining area. Background Art

[0002] The pollution risk level of non-ferrous metal, ferrous metal and other mineral mines is relatively high. The storage of tailings ponds and solid waste will cause serious pollution to the groundwater environment. Therefore, investigating and evaluating the groundwater environment in mining areas is a basic work for the protection of groundwater ecological environment.

[0003] At present, for groundwater sampling and analysis, monitoring wells are usually set up within the investigation range for sampling based on the distribution of pollution sources. According to the sampling specifications, the wells need to be cleaned 24 hours before collecting water samples in the monitoring wells to avoid monitoring wells from contaminating groundwater and affecting the accuracy of water sample evaluation results. However, the specifications do not give specific requirements for the cleaning of the sampling device itself. Therefore, the current sampling process mostly ignores the impact of the sampling device itself and the contact between the outside air and the water sample during the sampling process on the final water sample evaluation results. In addition, the specifications require that bubbles are strictly prohibited after the water sample is collected in the sampling bottle. The current commonly used method of directly pumping water samples through a sampling pump is difficult to avoid the bubble problem. Therefore, it is usually necessary to repeatedly fill the sampling bottle to successfully collect qualified water samples, resulting in extremely low sampling efficiency. Summary of the invention

[0004] The embodiment of the present invention provides a groundwater pollution assessment sampling device in a mining area, aiming to improve the groundwater sampling efficiency and the groundwater pollution assessment accuracy.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: to provide a groundwater pollution assessment sampling device in a mining area, comprising:

[0006] A frame having a lifting joint;

[0007] The sampling tank is rotatably connected to the frame and the rotating axis is the radial direction of the sampling tank. A first elastic valve is provided at one end of the sampling tank. The first elastic valve is used to dock with the lifting joint up and down when the sampling tank is rotated to a vertical state, and is opened under the pushing action of the lifting joint; a second elastic valve is provided at the other end of the sampling tank. The second elastic valve is used to detachably connect the sampling bottle and is opened under the pressure of the bottle mouth of the sampling bottle;

[0008] A vacuum pump is arranged on the frame and has a negative pressure pipeline connected to the lifting joint, and a first solenoid valve is connected to the negative pressure pipeline;

[0009] A water pump is arranged on the frame, and has a water pumping pipe for extending into the monitoring well and a drainage pipe connected to the lifting joint, and a second solenoid valve is connected to the drainage pipe;

[0010] A driving assembly is arranged on the frame and the output end is connected to the rotating shaft of the sampling tank. The driving assembly is used to drive the sampling tank to rotate so that the washing water shakes and flushes the inner wall of the sampling tank;

[0011] A controller is arranged on the frame and is electrically connected to the lifting joint, the vacuum pump, the water pump, the driving assembly, the first solenoid valve, and the second solenoid valve respectively;

[0012] Among them, when the lifting joint and the first elastic valve are connected, the vacuum pump evacuates the sampling tank through the opened first solenoid valve; when the target vacuum degree is reached in the sampling tank, the first solenoid valve is closed and the water pump draws water samples into the sampling tank through the opened second solenoid valve.

[0013] In a possible implementation, an intermediate water tank is provided on the frame, a water inlet nozzle is provided on the top of the intermediate water tank, and a water outlet is provided on the bottom; the drainage pipe includes a first pipe and a second pipe; one end of the first pipe is connected to a water pump, and the other end is connected to the water inlet nozzle, and the first pipe is connected to a second solenoid valve; one end of the second pipe is connected to a lifting joint, and the other end is connected to the water outlet, and the second pipe is provided with a third solenoid valve electrically connected to the controller; wherein, when the third solenoid valve is closed, the water pump draws water samples into the intermediate water tank through the opened second solenoid valve; when the liquid level of the intermediate water tank submerges the water outlet, the third solenoid valve is opened to allow the water sample to enter the sampling tank under the pressure difference between the sampling tank and the intermediate water tank.

[0014] In some embodiments, a breathing filter valve is provided at the top of the intermediate water tank to maintain normal pressure in the intermediate water tank; a first water level sensor and a second water level sensor electrically connected to a controller are provided at upper and lower intervals on the side walls of the intermediate water tank; wherein, when the liquid level in the intermediate water tank is higher than the second water level sensor, the third solenoid valve is opened, and when the liquid level in the intermediate water tank is lower than the first water level sensor, the second solenoid valve and the water pump are opened.

[0015] Exemplarily, a fourth solenoid valve electrically connected to the controller is provided on the water suction pipe; the second solenoid valve is connected to a waste discharge pipe, the third solenoid valve is connected to a water washing circulation pipe, and the water washing circulation pipe is connected to the fourth solenoid valve; wherein the water suction pump is used to draw the flushing water sample in the sampling tank through the water washing circulation pipe to circulate and flush the intermediate water tank, and to discharge the flushing water sample after multiple cycles through the waste discharge pipe.

[0016] By way of example, lift joints include:

[0017] The fixed pipe body is vertically fixed to the frame and is used to connect the drainage pipe and the negative pressure pipe;

[0018] The lifting tube body is slidably arranged in the fixed tube body and seals against the inner wall of the fixed tube body. The top end of the lifting tube body extends out of the fixed tube body and is used to connect with the first elastic valve. The peripheral wall of the lifting tube body extending out of the fixed tube body is provided with an ear plate, and the ear plate is provided with a permanent magnet;

[0019] The electromagnetic coil is arranged on the frame and is located directly below the permanent magnet, and the electromagnetic coil is electrically connected to the controller;

[0020] When a positive current is passed through the electromagnetic coil, the electromagnetic coil repels the permanent magnet to make the lifting tube rise and connect with the first elastic valve. When a reverse current is passed through the electromagnetic coil, the electromagnetic coil attracts the permanent magnet to make the lifting tube descend and separate from the first elastic valve.

[0021] In some embodiments, one end of the sampling tank is formed into a cone and has a straight through hole, and the inner end of the straight through hole forms a cone wall; the first elastic valve includes a valve stem and a first elastic member; the valve stem is slidably connected to the straight through hole, and one end extends into the interior of the sampling tank to form a cone ball, and the first elastic member is sleeved on the valve stem and is used to make the cone ball elastically press against the cone wall; wherein, a water sample channel is provided between the valve stem and the hole wall of the straight through hole, and when the lifting joint is docked with the valve stem and pushes the valve stem upward, the cone ball separates from the cone wall to allow the sampling tank and the lifting joint to be connected through the water sample channel.

[0022] In some embodiments, a tapered hole is provided at one end of the valve stem away from the tapered ball, and the tapered hole is used to seal and dock with the top end of the lifting joint; the valve stem has multiple notches connected to the tapered hole distributed along its axial direction, and each notch and the tapered hole together form a water sample channel.

[0023] Exemplarily, an end of the sampling tank facing away from the straight through hole is provided with a mounting hole for connecting a sampling bottle; the second elastic valve includes a guide baffle, a valve plate, a push plate and a plurality of second elastic members; wherein the guide baffle is arranged in a position close to the mounting hole in the sampling tank, and a sample outlet is provided in the middle of the guide baffle and is aligned with the mounting hole, and the sample outlet is connected to a sample outlet cone tube extending into the mounting hole; the valve plate is aligned with the sample outlet and is located on a side of the guide baffle facing away from the mounting hole; the push plate is located on a side of the guide baffle close to the mounting hole and has a plurality of sliding rods distributed at intervals, each of which is slidably penetrated through the guide baffle and connected to the valve plate, and the push plate has an avoidance hole for the sample outlet cone tube to pass through; each second elastic member is respectively sleeved on each sliding rod and is used to make the valve plate elastically press against the guide baffle to block the sample outlet; wherein, when the sampling bottle is connected to the mounting hole, the sample outlet cone tube is inserted into the bottle mouth of the sampling bottle, and the bottle mouth of the sampling bottle pushes the push plate upward to separate the valve plate from the guide baffle.

[0024] For example, a puncture membrane is provided in the mouth of the sampling bottle, and a sealing film is provided on the puncture membrane; when the sampling bottle is connected to the mounting hole, the sample cone tube pierces the puncture membrane, and the sealing film is used to seal the hole on the puncture membrane after the sampling is completed.

[0025] In some embodiments, the drive assembly includes:

[0026] A first gear, rotatably connected to the frame and provided with an eccentric shaft;

[0027] A rocker, one end of which is sleeved on the rotating shaft of the sampling tank;

[0028] A ring rail, arranged on the frame and located between the first gear and the rocker;

[0029] A connecting rod, one end of which is rotatably connected to the other end of the rocker, and the other end of which is rotatably connected to the eccentric shaft; a guide wheel is provided on the connecting rod, and the guide wheel rolls on the ring rail;

[0030] The rotary driving member is arranged on the frame and has a second gear at the output end, and the second gear is meshed with the first gear.

[0031] The beneficial effect of the groundwater pollution assessment sampling device for mining areas provided by the present invention is that compared with the prior art, the groundwater pollution assessment sampling device for mining areas provided by the present invention uses a frame to support the ground near the monitoring well and extends the pumping pipe into the monitoring well below the water sample liquid level, and then the driving component drives the sampling tank to rotate until the first elastic valve is vertically aligned with the lifting joint downward, the controller controls the lifting joint to rise to achieve a sealed docking with the first elastic valve, and the first elastic valve is opened under the pushing action of the lifting joint, and then the vacuum pump and the first solenoid valve are turned on to vacuum the sampling tank through the negative pressure pipeline, and the first solenoid valve and the vacuum pump are closed after the vacuum degree of the sampling tank reaches the target value, and then the second solenoid valve and the pumping pump are turned on to draw a certain amount of water sample into the sampling tank, and then the sampling tank is driven to rotate by the driving component so that the water sample flushes and cleans the inner wall of the sampling tank, and after the cleaning is completed, the water sample is discharged, and then the sampling tank is re-introduced into the sampling tank. A water sample for testing is extracted from the tank, and then the sampling bottle is installed on the second elastic valve and the second elastic valve is opened by the pressure of the bottle mouth of the sampling bottle. At this time, the driving component drives the sampling tank to rotate until the sampling bottle is located at the bottom of the sampling tank, and the sampling bottle can be filled with water samples. Finally, the sampling bottle is removed and sealed. By using the water sample in the monitoring well to clean the sampling tank during the sampling process, it is possible to avoid other impurities in the final collected water sample and affect the accuracy of the water sample evaluation result, thereby improving the sampling quality. By vacuuming the sampling tank, on the one hand, it is possible to avoid the substances in the water sample from contacting with the outside air and deteriorating, thereby affecting the accuracy of the evaluation result. On the other hand, it is possible to make the bubbles in the water sample precipitate in the sampling tank, and then use gravity to make the water sample flow to fill the sampling bottle, which can not only improve the sampling quality, but also avoid the appearance of bubbles in the water sample collected in the sampling bottle, thereby improving the sampling success rate and further improving the sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the main structure of a groundwater pollution assessment sampling device for a mining area provided by an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the connection structure between the sampling tank and the rack used in the embodiment of the present invention;

[0034] Figure 3 A schematic cross-sectional view of the sampling tank used in an embodiment of the present invention when evacuating a vacuum and collecting a water sample;

[0035] Figure 4 It is a schematic cross-sectional view of the sampling tank used in the embodiment of the present invention when water sample flows into the sampling bottle;

[0036] Figure 5 for Figure 3 A schematic diagram of the local enlarged structure at point A in the middle;

[0037] Figure 6 A schematic cross-sectional view of a sampling bottle used in an embodiment of the present invention;

[0038] Figure 7 It is a schematic diagram of the three-dimensional structure of the valve stem used in the embodiment of the present invention.

[0039] In the figure: 10, frame; 20, lifting joint; 21, fixed tube body; 22, lifting tube body; 221, ear plate; 222, permanent magnet; 23, electromagnetic coil; 30, sampling tank; 31, first elastic valve; 311, valve stem; 3111, cone ball; 312, first elastic member; 313, water sample channel; 3131, cone hole; 3132, notch; 32, second elastic valve; 321, guide baffle; 3211, sample outlet; 3212, sample outlet cone tube; 322, valve plate; 323, push plate; 3231, slide rod; 3232, avoidance hole; 324, second elastic member; 33, negative pressure sensor; 34, straight through hole; 341, cone wall; 35, mounting hole; 40 , sampling bottle; 41, puncture membrane; 42, sealing film; 50, vacuum pump; 51, negative pressure pipeline; 511, first solenoid valve; 60, water pump; 61, water pipe; 611, fourth solenoid valve; 62, second solenoid valve; 621, waste pipe; 63, third solenoid valve; 631, water washing circulation pipe; 70, drive assembly; 71, first gear; 711, eccentric shaft; 72, rocker; 73, ring rail; 74, connecting rod; 741, guide wheel; 75, rotating drive member; 751, second gear; 80, controller; 90, intermediate water tank; 91, water inlet nozzle; 92, water outlet; 93, breathing filter valve; 94, first water level sensor; 95, second water level sensor. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on another element or indirectly on another element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0042] Please also read Figures 1 to 7 , the groundwater pollution assessment sampling device for mining areas provided by the present invention is now described. The groundwater pollution assessment sampling device for mining areas includes a frame 10, a sampling tank 30, a vacuum pump 50, a water pump 60, a driving assembly 70, and a controller 80; wherein, a lifting joint 20 is provided on the frame 10; the sampling tank 30 is rotatably connected to the frame 10 and the rotation axis is the radial direction of the sampling tank 30, and a first elastic valve 31 is provided at one end of the sampling tank 30, and the first elastic valve 31 is used to dock with the lifting joint 20 up and down when the sampling tank 30 rotates to a vertical state, and is opened under the pushing action of the lifting joint 20; a second elastic valve 32 is provided at the other end of the sampling tank 30, and the second elastic valve 32 is used to detachably connect the sampling bottle 40, and is opened under the pressure of the bottle mouth of the sampling bottle 40; the vacuum pump 50 is arranged on the frame 10, and has a negative pressure pipeline 51 connected to the lifting joint 20, and the negative pressure pipeline 51 is connected to the first solenoid valve 511; the water pump 6 0 is arranged on the frame 10, and has a water suction pipe 61 for extending into the monitoring well and a drainage pipe connected to the lifting joint 20, and the drainage pipe is connected to the second solenoid valve 62; the driving component 70 is arranged on the frame 10 and the output end is connected to the rotating shaft of the sampling tank 30, and the driving component 70 is used to drive the sampling tank 30 to rotate so that the washing water shakes and flushes the inner wall of the sampling tank 30; the controller 80 is arranged on the frame 10 and is electrically connected to the lifting joint 20, the vacuum pump 50, the water suction pump 60, the driving component 70, the first solenoid valve 511, and the second solenoid valve 62 respectively; wherein, when the lifting joint 20 and the first elastic valve 31 are connected, the vacuum pump 50 vacuumizes the sampling tank 30 through the opened first solenoid valve 511; when the target vacuum degree is reached in the sampling tank 30, the first solenoid valve 511 is closed, and the water suction pump 60 extracts water samples into the sampling tank 30 through the opened second solenoid valve 62.

[0043] Compared with the prior art, the mining area groundwater pollution assessment sampling device provided in this embodiment uses a frame 10 to support the ground near the monitoring well and extends the water pumping pipe 61 into the monitoring well below the water sample liquid level, and then the driving component 70 drives the sampling tank 30 to rotate until the first elastic valve 31 is vertically aligned with the lifting joint 20 downward, the controller 80 controls the lifting joint 20 to rise to achieve a sealed docking with the first elastic valve 31, and the first elastic valve 31 is opened under the pushing action of the lifting joint 20, and then the vacuum pump 50 is turned on. The sampling tank 30 is evacuated through the negative pressure pipeline 51 with the first solenoid valve 511. After the vacuum degree of the sampling tank 30 reaches the target value (the sampling tank 30 may be provided with a negative pressure sensor 33 electrically connected to the controller 80), the first solenoid valve 511 and the vacuum pump 50 are closed, and then the second solenoid valve 62 and the water pump 60 are opened to draw a certain amount of water sample into the sampling tank 30 for cleaning the sampling tank 30, and then the sampling tank 30 is driven to rotate by the driving assembly 70 so that the water sample can flush and clean the inner wall of the sampling tank 30.

[0044] After cleaning is completed, the cleaning water sample is discharged, and then the water sample for detection is drawn into the sampling tank 30 again, and then the sampling bottle 40 is installed on the second elastic valve 32 and the second elastic valve 32 is opened by the pressure of the bottle mouth of the sampling bottle 40. At this time, the driving assembly 70 drives the sampling tank 30 to rotate until the sampling bottle 40 is located at the bottom of the sampling tank 30, and this state is maintained until the water sample in the sampling tank 30 flows downward and fills the sampling bottle 40. Finally, the sampling bottle 40 is removed and sealed to complete a sampling.

[0045] By using the water sample in the monitoring well to clean the sampling tank 30 during the sampling process, it is possible to avoid other impurities (including water stains and impurities in the water remaining in the sampling tank 30 after sampling in other monitoring wells) from being mixed into the final collected water sample, thereby affecting the accuracy of the water sample evaluation results, thereby improving the sampling quality; by evacuating the sampling tank 30, on the one hand, it is possible to avoid the substances in the water sample from coming into contact with the outside air (chemical reaction) and deteriorating, thereby affecting the accuracy of the evaluation results, and on the other hand, it is possible to allow the bubbles in the water sample to precipitate in the sampling tank 30 (under the action of vacuum negative pressure), and then use gravity to make the water sample flow to fill the sampling bottle 40, thereby avoiding excessive oscillation of the water flow entering the sampling bottle 40 and re-generating bubbles, which not only improves the sampling quality, but also avoids the bubble problem, thereby increasing the success rate of one-time sampling, and further improving the sampling efficiency.

[0046] In some embodiments, see Figure 1An intermediate water tank 90 is provided on the frame 10, a water inlet nozzle 91 is provided on the top of the intermediate water tank 90, and a water outlet 92 is provided on the bottom; the drainage pipe includes a first pipe and a second pipe; one end of the first pipe is connected to the water pump 60, and the other end is connected to the water inlet nozzle 91, and the first pipe is connected to the second solenoid valve 62; one end of the second pipe is connected to the lifting joint 20, and the other end is connected to the water outlet 92, and the second pipe is provided with a third solenoid valve 63 electrically connected to the controller 80; wherein, the water pump 60 draws water samples into the intermediate water tank 90 through the opened second solenoid valve 62 when the third solenoid valve 63 is closed; when the liquid level of the intermediate water tank 90 submerges the water outlet 92, the third solenoid valve 63 is opened to allow the water sample to enter the sampling tank 30 under the pressure difference between the sampling tank 30 and the intermediate water tank 90.

[0047] After the sampling tank 30 is evacuated, the third solenoid valve 63 is first closed and the second solenoid valve 62 is opened. The water pump 60 draws water samples into the intermediate water tank 90 through the first tube, and then the third solenoid valve 63 is opened. At this time, since the pressure of the sampling tank 30 is lower than that of the intermediate water tank 90, the water sample in the intermediate water tank 90 enters the sampling tank 30 through the second tube under the action of the pressure difference. Compared with the method of directly sucking the water sample into the sampling tank 30 through the water pump 60, the process of the water sample entering the sampling tank 30 can be more relaxed, which helps to alleviate the excessive oscillation phenomenon of the water sample entering the sampling tank 30, thereby reducing the bubble content in the water sample in the sampling tank 30. On this basis, the negative pressure in the sampling tank 30 is used to make all the bubbles in the water sample precipitate, thereby avoiding the situation where the water sample is still mixed with bubbles after flowing into the sampling bottle 40, further improving the success rate of one-time sampling.

[0048] The function of the water inlet nozzle 91 is to enable the flushing water sample to be sprayed on the entire inner wall of the intermediate water tank 90 when drawing the water sample for flushing into the intermediate water tank 90, thereby flushing the intermediate water tank 90, and then the flushing water sample enters the sampling tank 30 for flushing and is emptied after completion. This can avoid the water samples in other monitoring wells remaining in the intermediate water tank 90 from affecting the quality of this water sample collection, thereby ensuring the accuracy of the water sample evaluation results in the monitoring well at the current location.

[0049] As a further variation of the intermediate water tank 90, please refer to Figure 1 A breathing filter valve 93 is set at the top of the intermediate water tank 90 to keep the intermediate water tank 90 at normal pressure; a first water level sensor 94 and a second water level sensor 95 electrically connected to the controller 80 are set at intervals on the upper and lower side walls of the intermediate water tank 90; wherein, when the liquid level of the intermediate water tank 90 is higher than the second water level sensor 95, the third solenoid valve 63 is opened, and when the liquid level of the intermediate water tank 90 is lower than the first water level sensor 94, the second solenoid valve 62 and the water pump 60 are opened.

[0050] By setting the breathing filter valve 93, it is possible to exhale when drawing water samples into the intermediate water tank 90 to avoid an increase in the pressure in the intermediate water tank 90. ​​At the same time, it is also possible to replenish air into the intermediate water tank 90 through the breathing filter valve 93 when the intermediate water tank 90 discharges water into the sampling tank 30 based on the pressure difference between the two, thereby avoiding negative pressure in the intermediate water tank 90 due to the drop in water level, which makes it impossible for the water sample to enter the sampling tank 30. On this basis, two water level sensors are set to detect the water level in the intermediate water tank 90 in real time. The second water level sensor 95 is located above the water outlet 92. Therefore, when the liquid level in the intermediate water tank 90 is higher than the second water level sensor 95, it indicates that the water sample has completely submerged the water outlet 92. At this time, opening the third solenoid valve 63 can allow the water sample to enter the sampling tank 30. Under the action of pressure difference, it enters the sampling tank 30. During this process, the second solenoid valve 62 and the water pump 60 maintain normal operation. When the water level of the intermediate water tank 90 is higher than the first water level sensor 94, the second solenoid valve 62 and the water pump 60 can be closed. At this time, the water level of the intermediate water tank 90 decreases as the water sample continues to enter the sampling tank 30. When the water level drops to below the first water level sensor 94, the second solenoid valve 62 and the water pump 60 are restarted to replenish the water sample into the intermediate water tank 90, thereby ensuring that the water sample can continuously and stably enter the sampling tank 30. On the one hand, it can avoid the problem of the intermediate water tank 90 being full of water due to the continuous operation of the water pump 60. On the other hand, it can avoid the water level in the intermediate water tank 90 being too low, causing air to enter the sampling tank 30 and produce bubbles.

[0051] It should be noted that, in the present embodiment, the water outlet 92 is located at the bottom of the intermediate water tank 90. ​​Since the water sample can submerge the water outlet 92 and the intermediate water tank 90 is a normal pressure water tank, although the outside air can enter the intermediate water tank 90 after being filtered through the breathing filter valve 93, the air entering the intermediate water tank 90 can only contact the water sample on the surface of the liquid, and will not penetrate into the water sample below the liquid surface, nor will it enter the sampling tank 30 from the water outlet 92. Therefore, the water sample entering the sampling tank 30 can be isolated from the outside air, thereby ensuring the sampling quality.

[0052] For some possible implementations, see Figure 1 A fourth solenoid valve 611 electrically connected to the controller 80 is provided on the water suction pipe 61; the second solenoid valve 62 is connected to the waste discharge pipe 621, the third solenoid valve 63 is connected to the water washing circulation pipe 631, and the water washing circulation pipe 631 is connected to the fourth solenoid valve 611; wherein, the water suction pump 60 is used to draw the flushing water sample in the sampling tank 30 through the water washing circulation pipe 631 to circulate and flush the intermediate water tank 90, and to discharge the flushing water sample after multiple cycles through the waste discharge pipe 621.

[0053] Here, the second solenoid valve 62, the third solenoid valve 63, and the fourth solenoid valve 611 are all three-way solenoid valves controlled by the controller 80. After the sampling tank 30 is vacuumed, when the water sample from the monitoring well is used to wash the intermediate water tank 90 and the sampling tank 30, the flushing water sample is first drawn from the monitoring well into the intermediate water tank 90 through the pumping pipe 61 and the first pipe. In this process, the flushing water sample is sprayed on the inner wall of the intermediate water tank 90 by the water inlet nozzle 91 to achieve the washing of the intermediate water tank 90. ​​Then, the second pipe is used to make the flushing water sample enter the sampling tank 30 under the pressure difference between the sampling tank 30 and the intermediate water tank 90. ​​The driving component 70 drives the sampling tank 30 to rotate and shake the water sample to wash the inner wall of the sampling tank 30. After the washing is completed, the third solenoid valve 63 is replaced to make the lifting joint 20 and the water washing cycle The annular pipe 631 is connected, and at the same time, the fourth solenoid valve 611 is changed to connect the water washing circulation pipe 631 with the water pump 60, and then the flushing water sample in the sampling tank 30 is pumped back to the intermediate water tank 90 through the water pump 60 to clean the intermediate water tank 90 again. After multiple cycles, the second solenoid valve 62 is changed to connect the first pipe with the waste discharge pipe 621, and then the cleaning water sample in the sampling tank 30 is emptied through the waste discharge pipe 621 through the suction pump, and after the sampling tank 30 is emptied, the second solenoid valve 62 is changed to connect the second pipe with the water washing circulation pipe 631, and finally the cleaning water sample in the intermediate water tank 90 is emptied through the suction pump; the above-mentioned multiple flushing processes can improve the water washing effect of the sampling tank 30 and the intermediate water tank 90, thereby improving the final sampling quality and the accuracy of the water sample evaluation results.

[0054] As a specific embodiment of the lifting joint 20, see Figure 3 and Figure 4 The lifting joint 20 includes a fixed tube body 21, a lifting tube body 22 and an electromagnetic coil 23; the fixed tube body 21 is vertically fixed to the frame 10 and is used to connect the drain pipe and the negative pressure pipeline 51; the lifting tube body 22 is slidably arranged in the fixed tube body 21 and is sealed against the inner wall of the fixed tube body 21, the top of the lifting tube body 22 extends out of the fixed tube body 21 and is used to connect with the first elastic valve 31, and the peripheral wall of the lifting tube body 22 extending out of the fixed tube body 21 is provided with an ear plate 221, and the ear plate 221 is provided with a permanent magnet 222; the electromagnetic coil 23 is arranged on the frame 10 and is located directly below the permanent magnet 222, and the electromagnetic coil 23 is electrically connected to the controller 80; wherein, when a forward current is passed through the electromagnetic coil 23, the permanent magnet 222 repels each other so that the lifting tube body 22 rises to connect with the first elastic valve 31, and when a reverse current is passed through the electromagnetic coil 23, the permanent magnet 222 attracts each other so that the lifting tube body 22 descends and separates from the first elastic valve 31.

[0055] When the driving assembly 70 drives the sampling tank 30 to rotate until the first elastic valve 31 is vertically downward, the controller 80 controls the electromagnetic coil 23 to pass a positive current. At this time, the top end of the electromagnetic coil 23 forms a magnetic pole that repels the permanent magnet 222 and pushes the lifting tube body 22 upward, so that the lifting tube body 22 slides upward and seals with the first elastic valve 31. When the sampling tank 30 needs to be rotated and flushed, the controller 80 controls the current of the electromagnetic coil 23 in the opposite direction, so that the top end of the electromagnetic coil 23 forms a magnetic pole that attracts the permanent magnet 222, thereby causing the lifting tube body 22 to slide downward under the magnetic attraction of the electromagnetic coil 23 and separate from the first elastic valve 31. The structure is simple and compact, and the action response is sensitive and efficient.

[0056] In some embodiments, in combination Figure 3 , Figure 5 and Figure 7 It is understood that one end of the sampling tank 30 is formed into a cone and has a straight hole 34, and the inner end of the straight hole 34 forms a cone wall 341; the first elastic valve 31 includes a valve stem 311 and a first elastic member 312; the valve stem 311 is slidably connected to the straight hole 34, and one end extends into the interior of the sampling tank 30 to form a cone ball 3111, and the first elastic member 312 is sleeved on the valve stem 311 and is used to make the cone ball 3111 elastically press against the cone wall 341; wherein, a water sample channel 313 is provided between the valve stem 311 and the hole wall of the straight hole 34, and when the lifting joint 20 is docked with the valve stem 311 and pushes the valve stem 311 upward, the cone ball 3111 is separated from the cone wall 341 to allow the sampling tank 30 and the lifting joint 20 to be connected through the water sample channel 313.

[0057] The inner end of the straight through hole 34 is located at one end inside the sampling tank 30, and the inner end forms a conical wall 341 which can cooperate with the conical ball 3111 at the end of the valve stem 311 to form a seal on the straight through hole 34, thereby ensuring the normal sealing of the sampling tank 30; when the lifting joint 20 pushes the valve stem 311 upward, the conical ball 3111 separates from the conical wall 341, so that the inner cavity of the sampling tank 30 is connected with the water sample channel 313, and then connected with the lifting joint 20; when the lifting joint 20 slides down and the pushing force on the valve stem 311 is cancelled, the valve stem 311 is reset under the pushing action of the first elastic member 312, so that the conical ball 3111 is pressed against the conical wall 341 again, thereby realizing the linkage switch control of the first elastic valve 31 with the help of the lifting action of the lifting joint 20, and the operation is simple and efficient.

[0058] Specifically, see Figure 5 and Figure 7In this embodiment, a tapered hole 3131 is provided at one end of the valve stem 311 away from the tapered ball 3111, and the tapered hole 3131 is used to seal and dock with the top end of the lifting joint 20; the valve stem 311 has a plurality of notches 3132 distributed along its axial direction and connected to the tapered hole 3131, and each notch 3132 and the tapered hole 3131 together form a water sample channel 313. The tapered hole 3131 at the end of the valve stem 311 facilitates sealed docking with the tapered head at the top of the lifting joint 20. Since the valve stem 311 slides with the wall of the straight hole 34, a notch 3132 is provided on the peripheral wall of the valve stem 311 to communicate with the tapered hole 3131. When the tapered ball 3111 and the tapered wall 341 are in sealing contact, the inner cavity of the sampling tank 30 can be blocked from each notch 3132. When the tapered ball 3111 and the tapered wall 341 are separated, the water sample (or air during vacuum) in the sampling tank 30 can enter each notch 3132 through the gap between the two, and then enter the tapered hole 3131 to flow toward the lifting joint 20. The structure is compact and reliable.

[0059] Please note that, see Figure 4 In some embodiments, a mounting hole 35 for connecting a sampling bottle 40 is provided at one end of the sampling tank 30 away from the straight through hole 34; the second elastic valve 32 includes a guide baffle 321, a valve plate 322, a push plate 323 and a plurality of second elastic members 324; wherein the guide baffle 321 is arranged in the sampling tank 30 near the mounting hole 35, and a sample outlet 3211 aligned with the mounting hole 35 is provided in the middle of the guide baffle 321, and the sample outlet 3211 is connected to a sample outlet cone 3212 extending into the mounting hole 35; the valve plate 322 is aligned with the sample outlet 3211 and is located on the side of the guide baffle 321 away from the mounting hole 35; the push plate 323 is located in the guide baffle A plurality of slide bars 3231 are arranged at intervals on one side of the plate 321 close to the mounting hole 35. Each slide bar 3231 is slidably penetrated through the guide baffle 321 and connected to the valve plate 322. The push plate 323 has an avoidance hole 3232 for the sample outlet cone 3212 to pass through. Each second elastic member 324 is respectively sleeved on each slide bar 3231 and is used to make the valve plate 322 elastically press against the guide baffle 321 to block the sample outlet 3211. When the sampling bottle 40 is connected to the mounting hole 35, the sample outlet cone 3212 is inserted into the bottle mouth of the sampling bottle 40, and the bottle mouth of the sampling bottle 40 pushes the push plate 323 upward to separate the valve plate 322 from the guide baffle 321.

[0060] Here, the mounting hole 35 can specifically be a threaded hole or a plug-in hole. The bottle mouth of the sampling bottle 40 is a straight tube structure that cooperates with the mounting hole 35, and the bottle mouth can pass through the mounting hole 35 to apply a pushing force to the push plate 323; when the sampling tank 30 is cleaned and the water sample for detection is collected, the sampling tank 30 is still in a vertical state with the second elastic valve 32 facing upward. At this time, the sampling bottle 40 is installed in the mounting hole 35, and the push plate 323 drives the valve plate 322 to separate from the guide partition 321 under the pushing action of the bottle mouth of the sampling bottle 40. At this time, the sampling tank 30 and the sampling bottle 40 are connected through the sample outlet cone 3212, so the internal pressures of the two tend to be consistent (the overall pressure decreases due to the increase in space), and then the controller 80 controls the lifting and lowering connection After the head 20 is separated from the first elastic valve 31, the sampling tank 30 is rotated one hundred and eighty degrees driven by the driving assembly 70. At this time, the sampling bottle 40 is located below the sampling tank 30, and the water sample in the sampling tank 30 enters the sample outlet cone 3212 through the sample outlet 3211 above the guide baffle 321, and then flows into the sampling bottle 40. Because the sampling bottle 40 is at the same pressure as the sampling tank 30 before the sampling tank 30 is turned over, it can ensure that the water sample used for detection inside the sampling tank 30 flows smoothly into the sampling bottle 40 after the sampling tank 30 is turned over, avoiding the situation where the pressure in the sampling bottle 40 is higher than that in the sampling tank 30, resulting in the water sample being unable to flow smoothly into the sampling bottle 40. Not only can the risk of bubbles in the water sample be reduced by gravity filling, but also the sampling efficiency can be improved.

[0061] Figure 6 The figure shows a specific structure of a sampling bottle 40, in which a puncture membrane 41 is provided in the bottle mouth of the sampling bottle 40, and a sealing film 42 is provided on the puncture membrane 41; wherein, when the sampling bottle 40 is connected to the mounting hole 35, the sample outlet cone 3212 punctures the puncture membrane 41, and the sealing film 42 is used to seal the hole on the puncture membrane 41 after the sampling is completed. The sampling bottle 40 is a pre-treated clean container, which is sealed by a puncture membrane 41. The puncture membrane 41 and the sealing film 42 can specifically be medical rubber or plastic film. The puncture membrane 41 is in good condition before the sampling bottle 40 is installed. When installing the sampling bottle 40, the sealing film 42 is first removed. During the installation process, the tip of the sample outlet cone 3212 is used to pierce the puncture membrane 41 and the sample outlet cone 3212 is tightened using the perforation formed on the puncture membrane 41, thereby ensuring the sealing of the connection between the sampling bottle 40 and the sampling tank 30. After the sampling bottle 40 is filled with water sample, the sampling bottle 40 is removed and the sealing film 42 is re-covered on the puncture membrane 41, thereby ensuring the sealing of the sampling bottle 40. This can not only prevent the outside air from contacting the water sample and affecting the accuracy of the water sample evaluation result, but also prevent water sample leakage, thereby facilitating sample transportation.

[0062] For example, see Figure 1 and Figure 2The driving assembly 70 includes a first gear 71, a rocking arm 72, a ring rail 73, a connecting rod 74, and a rotating driving member 75; wherein the first gear 71 is rotationally connected to the frame 10 and an eccentric shaft 711 is provided on the first gear 71; one end of the rocking arm 72 is sleeved on the rotating shaft of the sampling tank 30; the ring rail 73 is provided on the frame 10 and is located between the first gear 71 and the rocking arm 72; one end of the connecting rod 74 is rotationally connected to the other end of the rocking arm 72, and the other end is rotationally connected to the eccentric shaft 711; a guide wheel 741 is provided on the connecting rod 74, and the guide wheel 741 rolls on the ring rail 73; the rotating driving member 75 is provided on the frame 10 and is electrically connected to the controller 80, and a second gear 751 is provided at the output end, and the second gear 751 is meshed with the first gear 71.

[0063] The rotating drive member 75 can specifically be a motor electrically connected to the controller 80. The second gear 751 of the rotating drive member 75 drives the first gear 71 to rotate, thereby driving the rocker 72 to swing through the connecting rod 74. The guiding effect of the slide rail on the guide wheel 741 can enable the rocker 72 to rotate 360 ​​degrees and drive the sampling tank 30 to rotate as a whole, thereby ensuring the comprehensive flushing of the inner wall of the sampling tank 30 by the flushing water sample. At the same time, the sampling tank 30 can also be rotated and maintained in a vertical state for water sample collection. The working process is stable and reliable.

[0064] Specifically, the eccentricity of the eccentric shaft 711, the radius of the ring rail 73, and the distance between the connection points at both ends of the rocker 72 are equal, thereby ensuring that the first gear 71 drives the rocker 72 to rotate synchronously, avoiding irregular swinging of the rocker 72, and improving movement smoothness and stability.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sampling device for assessing groundwater pollution in mining areas, characterized in that: include: A frame having a lifting joint; A sampling tank is rotatably connected to the frame and the rotation axis is the radial direction of the sampling tank. A first elastic valve is provided at one end of the sampling tank. The first elastic valve is used to dock with the lifting joint up and down when the sampling tank is rotated to a vertical state, and is opened under the pushing action of the lifting joint; a second elastic valve is provided at the other end of the sampling tank. The second elastic valve is used to detachably connect to a sampling bottle and is opened under the pressure of the bottle mouth of the sampling bottle; A vacuum pump is arranged on the frame and has a negative pressure pipeline connected to the lifting joint, wherein the negative pressure pipeline is connected to a first solenoid valve; A water pump, arranged on the frame, having a water pumping pipe for extending into the monitoring well and a drainage pipe connected to the lifting joint, wherein the drainage pipe is connected to a second solenoid valve; A driving assembly is arranged on the frame and the output end of which is connected to the rotating shaft of the sampling tank, and the driving assembly is used to drive the sampling tank to rotate so that the flushing water sample shakes and flushes the inner wall of the sampling tank; A controller, which is disposed on the frame and is electrically connected to the lifting joint, the vacuum pump, the water pump, the driving assembly, the first solenoid valve, and the second solenoid valve respectively; Among them, when the lifting joint and the first elastic valve are connected, the vacuum pump evacuates the sampling tank through the opened first solenoid valve; when the target vacuum degree is reached in the sampling tank, the first solenoid valve is closed and the water pump draws water samples into the sampling tank through the opened second solenoid valve.

2. The mining area groundwater pollution assessment sampling device according to claim 1, characterized in that: The frame is provided with an intermediate water tank, the top of the intermediate water tank is provided with a water inlet nozzle, and the bottom is provided with a water outlet; the drainage pipe includes a first pipe and a second pipe; one end of the first pipe is connected to the water pump, and the other end is connected to the water inlet nozzle, and the first pipe is connected to the second solenoid valve; One end of the second tube is connected to the lifting joint, and the other end is connected to the water outlet, and a third solenoid valve electrically connected to the controller is provided on the second tube; wherein, when the third solenoid valve is closed, the water pump extracts water samples into the intermediate water tank through the opened second solenoid valve; when the liquid level of the intermediate water tank submerges the water outlet, the third solenoid valve is opened to allow the water sample to enter the sampling tank under the pressure difference between the sampling tank and the intermediate water tank; A breathing filter valve is arranged on the top of the intermediate water tank to keep the intermediate water tank at normal pressure; a first water level sensor and a second water level sensor electrically connected to the controller are arranged at intervals on the upper and lower side walls of the intermediate water tank; wherein, when the liquid level of the intermediate water tank is higher than the second water level sensor, the third solenoid valve is opened, and when the liquid level of the intermediate water tank is lower than the first water level sensor, the second solenoid valve and the water pump are opened.

3. The mining area groundwater pollution assessment sampling device as claimed in claim 2, characterized in that: The water pump is provided with a fourth solenoid valve electrically connected to the controller; the second solenoid valve is connected to a waste pipe, the third solenoid valve is connected to a water washing circulation pipe, and the water washing circulation pipe is connected to the fourth solenoid valve; wherein the water pump is used to suck the flushing water sample in the sampling tank through the water washing circulation pipe to circulate and flush the intermediate water tank, and to empty the flushing water sample after multiple cycles through the waste pipe.

4. The mining area groundwater pollution assessment sampling device according to claim 1, characterized in that: The lifting joint comprises: A fixed pipe body, vertically fixed to the frame and used to connect the drain pipe and the negative pressure pipeline; A lifting tube body is slidably arranged in the fixed tube body and seals against the inner wall of the fixed tube body, the top end of the lifting tube body extends out of the fixed tube body and is used to dock with the first elastic valve, and the peripheral wall of the lifting tube body extending out of the fixed tube body is provided with an ear plate, and the ear plate is provided with a permanent magnet; An electromagnetic coil is arranged on the frame and is located directly below the permanent magnet, and the electromagnetic coil is electrically connected to the controller; When a forward current is passed through the electromagnetic coil, the electromagnetic coil repels the permanent magnet to cause the lifting tube to rise and dock with the first elastic valve. When a reverse current is passed through the electromagnetic coil, the electromagnetic coil attracts the permanent magnet to cause the lifting tube to descend and detach from the first elastic valve.

5. The mining area groundwater pollution assessment sampling device according to claim 1, characterized in that: One end of the sampling tank is formed into a cone and has a straight through hole, and the inner end of the straight through hole forms a cone wall; the first elastic valve includes a valve stem and a first elastic member; the valve stem is slidably connected to the straight through hole, and one end extends into the interior of the sampling tank to form a cone ball, and the first elastic member is sleeved on the valve stem and is used to make the cone ball elastically press against the cone wall; wherein a water sample channel is provided between the valve stem and the hole wall of the straight through hole, and when the lifting joint is docked with the valve stem and pushes the valve stem upward, the cone ball is separated from the cone wall to allow the sampling tank and the lifting joint to be connected through the water sample channel.

6. The mining area groundwater pollution assessment sampling device as claimed in claim 5, characterized in that: A tapered hole is provided at one end of the valve stem away from the tapered ball, and the tapered hole is used to seal and dock with the top end of the lifting joint; the valve stem is provided with a plurality of notches connected to the tapered hole at intervals along its axial direction, and each of the notches and the tapered hole together form the water sample channel.

7. The mining area groundwater pollution assessment sampling device as claimed in claim 5, characterized in that: The end of the sampling tank away from the straight through hole is provided with a mounting hole for connecting the sampling bottle; the second elastic valve includes a guide baffle, a valve plate, a push plate and a plurality of second elastic members; wherein the guide baffle is arranged in the sampling tank near the mounting hole, and the middle part of the guide baffle is provided with a sample outlet aligned with the mounting hole, and the sample outlet is connected to a sample outlet cone extending into the mounting hole; the valve plate is aligned with the sample outlet and is located on the side of the guide baffle away from the mounting hole; the push plate is located at the guide baffle near the mounting hole A plurality of sliding rods are arranged at intervals on one side of the mounting hole, each of the sliding rods is slidably penetrated through the guide baffle and connected to the valve plate, and the push plate has an avoidance hole for the sample outlet cone to pass through; each of the second elastic members is respectively sleeved on each of the sliding rods and is used to make the valve plate elastically press against the guide baffle to block the sample outlet; wherein, when the sampling bottle is connected to the mounting hole, the sample outlet cone is inserted into the bottle mouth of the sampling bottle, and the bottle mouth of the sampling bottle pushes the push plate upward to separate the valve plate from the guide baffle.

8. The mining area groundwater pollution assessment sampling device as claimed in claim 7, characterized in that: A puncture membrane is provided in the mouth of the sampling bottle, and a sealing film is provided on the puncture membrane; wherein, when the sampling bottle is connected to the mounting hole, the sample outlet cone pierces the puncture membrane, and the sealing film is used to seal the hole on the puncture membrane after sampling is completed.

9. The mining area groundwater pollution assessment sampling device according to any one of claims 1 to 8, characterized in that: The drive assembly comprises: A first gear, rotatably connected to the frame and provided with an eccentric shaft; A rocker, one end of which is sleeved on the rotating shaft of the sampling tank; A ring rail, provided on the frame and located between the first gear and the rocker; A connecting rod, one end of which is rotatably connected to the other end of the rocker, and the other end of which is rotatably connected to the eccentric shaft; a guide wheel is provided on the connecting rod, and the guide wheel rolls on the ring rail; The rotary driving member is arranged on the frame and has a second gear at the output end, and the second gear is meshed with the first gear.

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