A deep aquifer groundwater monitoring well

Abstract

The application discloses a kind of deep aquifer groundwater monitoring wells, including well pipe, connecting assembly and sampling assembly;Well pipe includes outer tube and the middle tube and inner tube that are sequentially set in the inside of outer tube;Connecting assembly includes the connecting seat being arranged at the bottom end of outer tube and the wellhead fixing seat being set on the upper end of outer tube outside, connecting seat is respectively connected with outer tube, middle tube and inner tube by screw thread, wellhead fixing seat is equipped with well lid and the limiting component being respectively connected with outer tube, middle tube and inner tube by clamping;Sampling assembly includes the sampling cylinder being arranged in the inside of inner tube and the sampling cable being connected with sampling cylinder;The application structure design is reasonable, effectively reduces the risk of plugging of monitoring well and the difficulty of well flushing, and is suitable for promotion and use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of groundwater monitoring equipment, in particular to a deep aquifer groundwater monitoring well. BACKGROUND

[0002] China is a country of water resource shortage, and the underground fresh water accounts for one third of the total amount of water resources in China, which is an important water source for industrial and agricultural production and urban and rural domestic water use, and is an important guarantee for human survival and social and economic development. However, with the threat of urbanization and industrialization and other human activities in recent years, the groundwater quality in China is deteriorating, and the groundwater pollution has been very serious. Due to the complexity of the stratum below the ground surface and the slow flow of groundwater, groundwater pollution has the characteristics of slow process, difficult to find and difficult to control. Moreover, unlike surface water, groundwater cannot be directly observed, so it is necessary to monitor groundwater specially, to strengthen the dynamic monitoring of groundwater, to master the spatial and temporal distribution and variation of the quantity and quality of groundwater, and to prevent the further deterioration of groundwater pollution.

[0003] Establishing a groundwater monitoring well is currently the main method for long-term monitoring of dynamic changes of groundwater, and the monitoring well mainly monitors dynamic elements such as groundwater level, water quality, water temperature and water quantity. However, the cost of the groundwater monitoring well mainly depends on the depth, and once the deep groundwater monitoring well is silted, it is difficult to clean, which can easily lead to the scrap of the monitoring well. Moreover, the water quantity of well completion and well washing of the deep aquifer groundwater monitoring well is large, and a large amount of well washing wastewater produced in the well washing can easily cause secondary pollution. SUMMARY

[0004] In view of the above technical problems, the present application provides a deep aquifer groundwater monitoring well.

[0005] The technical scheme of the present application is as follows: a deep aquifer groundwater monitoring well, comprising a well pipe, a connecting assembly arranged at the end of the well pipe, and a sampling assembly movably arranged in the well pipe; the well pipe comprises an outer pipe, an intermediate pipe and an inner pipe which are sequentially arranged in the well pipe; water inlet holes are arranged on the side walls of the outer pipe, the intermediate pipe and the inner pipe, and the heights of the water inlet holes on the outer pipe, the intermediate pipe and the inner pipe increase sequentially, and a filter screen is arranged on each water inlet hole.

[0006] The connecting assembly comprises a connecting seat arranged at the bottom end of the outer pipe and a wellhead fixing seat arranged on the upper end of the outer pipe; a threaded connection sleeve with a decreasing inner diameter is arranged on the upper end face of the connecting seat, and the outer pipe, the intermediate pipe and the inner pipe are respectively connected with each threaded connection sleeve through internal threads; a first step portion and a second step portion are sequentially arranged in the wellhead fixing seat from top to bottom; a limiting assembly for clamping the outer pipe, the intermediate pipe and the inner pipe is movably clamped on the upper end of the wellhead fixing seat and the first step portion and the second step portion;

[0007] The sampling assembly comprises a sampling cylinder movably arranged inside the inner tube and a sampling cable having one end connected to the top end of the sampling cylinder and the other end penetrating through the top of the inner tube; a plurality of sampling cavities are equidistantly arranged inside the sampling cylinder; a through slot is arranged on the side wall of the sampling cylinder and corresponds to the position of each sampling cavity; a pulling sleeve is arranged inside the side wall of the sampling cylinder and corresponds to the position of each sampling cavity; a filter screen part capable of being in communication with the through slot is arranged on the pulling sleeve; and a cross rod is arranged at the top end of each pulling sleeve and is slidably connected to the inner wall of the sampling cavity at the corresponding position.

[0008] Further, the limiting assembly comprises a mounting frame movably connected to the second stepped portion through bolts, expansion rods arranged on the lower bottom surface of the mounting frame and located between the outer tube and the intermediate tube and between the intermediate tube and the inner tube, and a pushing ring arranged on the upper end of the mounting frame and connected to the expansion rods; the lower bottom surface of the mounting frame is provided with guide tubes located between the outer tube and the intermediate tube and between the intermediate tube and the inner tube; the expansion rods are arranged in pairs, and the two expansion rods of each pair are movably connected to the lower end of the guide tube on both sides; and a pushing rod is slidably connected between the two expansion rods of each pair; the pushing ring is threadedly connected on both sides with rotary lead screws rotatably connected to the upper end surface of the second stepped portion, and the lower bottom surface of the pushing ring is provided with a top rod penetrating the guide tube and movably connected to the pushing rod at the corresponding position.

[0009] Description: During use, the rotary lead screws are rotated to make the pushing ring pull the top rods in the corresponding guide tubes to rise, and the pushing rods are pulled to move between the two expansion rods during the rising of the top rods, so that the two expansion rods of each pair move away from each other and are clamped in the gap between the outer tube and the intermediate tube and between the intermediate tube and the inner tube, thereby limiting and fixing the intermediate tube and the inner tube.

[0010] Further, the bottom end of each expansion rod is rotatably connected with a sliding wheel.

[0011] Description: By arranging the sliding wheels, the pipe walls of the outer tube, the intermediate tube and the inner tube can be prevented from being scratched during the movement of the expansion rods.

[0012] Further, 3-6 groups of expansion rods are arranged between the outer tube and the intermediate tube and between the intermediate tube and the inner tube.

[0013] Description: By arranging multiple groups of expansion rods, the stress between the outer tube and the intermediate tube and between the intermediate tube and the inner tube is more uniform, and the deformation and displacement of the outer tube, the intermediate tube and the inner tube during the expansion of the expansion rods are avoided.

[0014] Further, the bottom ends of the outer pipe, the intermediate pipe and the inner pipe are provided with positioning sleeves; the lower bottom surfaces of the positioning sleeves are provided with positioning grooves; the upper end surfaces of the connecting seat and the positions corresponding to the positioning sleeves are provided with clamping grooves; the clamping grooves are provided with positioning balls capable of being clamped with the positioning grooves; the lower ends of the positioning balls are provided with damping springs abutting against the clamping grooves.

[0015] It is specified that when the outer pipe, the intermediate pipe and the inner pipe are connected with the corresponding threaded connecting sleeves, the positioning sleeves are inserted into the corresponding clamping grooves, the positioning balls are clamped and fixed with the positioning grooves under the action of the damping springs, the outer pipe, the intermediate pipe and the inner pipe are prevented from being separated from the connecting seat, and the use reliability of the monitoring well is improved.

[0016] Further, the filter screens are clamped with the water inlet holes at the corresponding positions, the lower ends of the filter screens are provided with pull springs connected with the outer pipe, the intermediate pipe and the inner pipe respectively, the upper ends of the filter screens are provided with pull ropes penetrating through the outer pipe, the intermediate pipe and the inner pipe respectively, and the upper end openings of the water inlet holes are provided with cleaning brush rings abutting against the filter screens at the corresponding positions; the upper ends of the outer pipe, the intermediate pipe and the inner pipe are provided with pull rings connected with the pull ropes at the corresponding positions.

[0017] It is specified that by pulling the pull rings, the pull ropes pull the corresponding filter screens to move upwards, the cleaning brush rings clean the pollutants adsorbed on the surfaces of the filter screens during the movement of the filter screens, and the use effect of the monitoring well is prevented from being affected due to the blockage of the filter screens.

[0018] Further, the pull rings are fixedly connected between the pull rings.

[0019] It is specified that by connecting the pull rings together, the filter screens can move synchronously, and the cleaning efficiency of the filter screens is improved.

[0020] Further, the connecting part between the well cover and the first step portion is provided with a locking bolt.

[0021] It is specified that by arranging the locking bolt, the monitoring well can be prevented from being damaged by human beings and being disabled.

[0022] Further, the outer pipe, the intermediate pipe and the inner pipe are PVC pipes, and the connecting seat, the wellhead fixing seat and the limiting component are made of stainless steel.

[0023] It is specified that the PVC pipes have better corrosion resistance, the outer pipe, the intermediate pipe and the inner pipe can be prevented from being corroded during use and interfering with the monitoring results of underground water, and the connecting seat, the wellhead fixing seat and the limiting component made of stainless steel have better use reliability.

[0024] Further, the outer pipe is provided with water-stopping expansion rings at the upper and lower ends of the water inlet hole.

[0025] Description: When the outer tube is inserted into the formation, the water stop expansion ring expands when it encounters water, preventing groundwater from seeping into the outer tube during the construction of the monitoring well, which affects the accuracy of the groundwater monitoring results.

[0026] The use method of the present application is:

[0027] S1, respectively, the outer tube, the intermediate tube and the inner tube are connected with the threaded connection sleeve on the connecting seat, then the outer tube, the intermediate tube and the inner tube are placed in the excavated underground well together; finally, the wellhead fixing seat is sleeved on the outside of the outer tube, and the outer tube, the intermediate tube and the inner tube are fixed and limited with the wellhead fixing seat by using the limiting assembly;

[0028] S2, the sampling cylinder is placed in the inner tube through the sampling cable, and the well cover is covered;

[0029] S3, the groundwater sample passes through the filter screen on the outer tube, the intermediate tube and the inner tube, and finally enters the inner tube; the groundwater sample in the inner tube enters each sampling cavity through the through slot on the sampling cylinder;

[0030] S4, when sampling is needed, open the well cover and pull the sampling cable, at this time each pulling sleeve slides along the corresponding sampling cavity under the action of gravity, and the through slot is closed; ensure that the water samples in each sampling cavity do not disturb each other during sampling.

[0031] Compared with the prior art, the beneficial effects of the present application are reflected in the following aspects:

[0032] First, the structure of the present application is reasonable, by setting the outer tube, the intermediate tube and the inner tube which are sleeved together, and the water inlet holes on the outer tube, the intermediate tube and the inner tube increase in height in turn, so that the groundwater enters the inner tube from bottom to top, and the particles in the groundwater are affected by gravity during migration and deposited in the gap between the outer tube, the intermediate tube and the inner tube, making the groundwater in the inner tube more clear, reducing the discharge of well flushing wastewater, and solving the problem of environmental secondary pollution caused by well flushing wastewater;

[0033] Second, the outer tube, the intermediate tube and the inner tube of the present application are respectively connected with the connecting seat by threads, which improves the convenience of cleaning and replacing the intermediate tube and the inner tube under the premise of ensuring reliable connection, and makes it easier to clean the deposited silt in the outer tube, reducing the maintenance cost of the monitoring well;

[0034] Third, the sampling assembly of the present application can collect multiple groundwater samples at the same time, and the groundwater samples will not interfere with each other during sampling, improving the reliability of the groundwater monitoring results; at the same time, since the concentration and solubility of different pollutants in groundwater have certain differences, collecting multiple groundwater samples makes the groundwater samples more representative. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a longitudinal sectional view of the present application;

[0036] Figure 2 is a connection schematic view of the outer tube, the intermediate tube, the inner tube and the connecting seat of the present application;

[0037] Figure 3 is a connection schematic view of the filter screen and the outer tube of the present application;

[0038] Figure 4 is a partial enlarged schematic view of A in the present application; Figure 3

[0039] Figure 5 is a connection schematic view of the limiting assembly, the outer tube, the intermediate tube and the inner tube of the present application;

[0040] Figure 6 is a partial enlarged schematic view of B in the present application; Figure 5

[0041] Figure 7 is a distribution diagram of the expansion rod between the outer tube and the intermediate tube, and between the intermediate tube and the inner tube of the present application;

[0042] Figure 8 is a structural schematic view of the sampling cylinder of the present application;

[0043] wherein, 1 - well pipe, 10 - outer tube, 11 - intermediate tube, 12 - inner tube, 13 - water inlet hole, 14 - filter screen, 140 - tension spring, 141 - pull rope, 15 - positioning sleeve, 150 - positioning groove, 16 - cleaning brush ring, 17 - pull ring, 18 - water stop expansion ring, 2 - connecting assembly, 20 - connecting seat, 200 - threaded connecting sleeve, 201 - clamping groove, 202 - positioning ball, 203 - damping spring, 21 - wellhead fixing seat, 210 - first step portion, 211 - second step portion, 22 - well cover, 23 - limiting assembly, 230 - mounting frame, 231 - expansion rod, 2310 - sliding wheel, 232 - pushing ring, 233 - guide tube, 234 - pushing rod, 235 - rotating lead screw, 236 - jacking rod, 3 - sampling assembly, 30 - sampling cylinder, 300 - sampling cavity, 301 - through groove, 31 - sampling pull cable, 32 - pulling sleeve, 320 - filter screen portion, 321 - cross rod. DETAILED DESCRIPTION

[0044] Example 1

[0045] As Figure 1 ​​The deep aquifer groundwater monitoring well shown comprises a well pipe 1, a connecting assembly 2 arranged at the end of the well pipe 1, and a sampling assembly 3 movably arranged inside the well pipe 1; the well pipe 1 comprises an outer pipe 10, an intermediate pipe 11 and an inner pipe 12 which are sequentially sleeved inside the outer pipe 10; water inlet holes 13 are arranged through the side walls of the outer pipe 10, the intermediate pipe 11 and the inner pipe 12, and the heights of the water inlet holes 13 on the outer pipe 10, the intermediate pipe 11 and the inner pipe 12 increase sequentially, and each water inlet hole 13 is provided with a filter screen 14;

[0046] As shown in Figure 1 、 2 , the connecting assembly 2 comprises a connecting seat 20 arranged at the bottom end of the outer pipe 10 and a wellhead fixing seat 21 sleeved on the outer end of the outer pipe 10; the upper end surface of the connecting seat 20 is provided with three thread connection sleeves 200 with decreasing inner diameters sequentially, and the outer pipe 10, the intermediate pipe 11 and the inner pipe 12 are threadedly connected with each thread connection sleeve 200 one by one; the inside of the wellhead fixing seat 21 is sequentially provided with a first step portion 210 and a second step portion 211 from top to bottom; the upper end of the wellhead fixing seat 21 is provided with a well lid 22 movably clamped with the first step portion 210, and the second step portion 211 is movably clamped with limiting assemblies 23 clamped with the outer pipe 10, the intermediate pipe 11 and the inner pipe 12 respectively; the limiting assemblies 23 are commercially available limiting bolts;

[0047] As shown in Figure 1 、 8 , the sampling assembly 3 comprises a sampling cylinder 30 movably arranged inside the inner pipe 12 and a sampling cable 31 with one end connected with the top end of the sampling cylinder 30 and the other end penetrating through the top of the inner pipe 12; the inside of the sampling cylinder 30 is equally distributed with four sampling cavities 300, the side wall of the sampling cylinder 30 is provided with a through slot 301 at a position corresponding to each sampling cavity 300, the inside of the side wall of the sampling cylinder 30 is provided with a pulling sleeve 32 at a position corresponding to each sampling cavity 300, the pulling sleeve 32 is provided with a filter screen portion 320 capable of being communicated with the through slot 301, and the top end of each pulling sleeve 32 is provided with a cross rod 321 slidably clamped with the inner wall of the corresponding sampling cavity 300; the sampling cable 31 penetrates through the sampling cylinder 30 and is connected with each cross rod 321 respectively.

[0048] Embodiment 2

[0049] As shown in Figure 1 , the deep aquifer groundwater monitoring well comprises a well pipe 1, a connecting assembly 2 arranged at the end of the well pipe 1, and a sampling assembly 3 movably arranged inside the well pipe 1; the well pipe 1 comprises an outer pipe 10, an intermediate pipe 11 and an inner pipe 12 which are sequentially sleeved inside the outer pipe 10; water inlet holes 13 are arranged through the side walls of the outer pipe 10, the intermediate pipe 11 and the inner pipe 12, and the heights of the water inlet holes 13 on the outer pipe 10, the intermediate pipe 11 and the inner pipe 12 increase sequentially, and each water inlet hole 13 is provided with a filter screen 14;

[0050] As Figure 1 , 2 , 5, 6, 7, the connecting assembly 2 comprises a connecting seat 20 arranged at the bottom end of the outer tube 10 and a wellhead fixing seat 21 sleeved on the outer top end of the outer tube 10; the upper end surface of the connecting seat 20 is provided with three threaded connecting sleeves 200 with decreasing inner diameters in sequence, and the outer tube 10, the intermediate tube 11 and the inner tube 12 are respectively connected with each threaded connecting sleeve 200 through internal threads; the inside of the wellhead fixing seat 21 is sequentially provided with a first stepped portion 210 and a second stepped portion 211 from top to bottom; the upper end of the wellhead fixing seat 21 is provided with a well cover 22 movably connected with the first stepped portion 210, and the second stepped portion 211 movably connects with a limiting assembly 23 connected with the outer tube 10, the intermediate tube 11 and the inner tube 12 respectively; the limiting assembly 23 comprises a mounting bracket 230 movably connected with the second stepped portion 211 through bolts, expansion rods 231 arranged on the lower bottom surface of the mounting bracket 230 and located between the outer tube 10 and the intermediate tube 11 and between the intermediate tube 11 and the inner tube 12, and a pushing ring 232 arranged on the upper end of the mounting bracket 230 and connected with the expansion rods 231; the lower bottom surface of the mounting bracket 230 is provided with guide tubes 233 located between the outer tube 10 and the intermediate tube 11 and between the intermediate tube 11 and the inner tube 12, and the expansion rods 231 are arranged in pairs, and the two expansion rods 231 of each pair are movably hinged on both sides of the lower end of the guide tube 233, and a pushing rod 234 is movably connected between the two expansion rods 231 of each pair; the pushing ring 232 is threadedly connected with a rotating lead screw 235 rotatably connected with the upper end surface of the second stepped portion 211 on both sides, and the lower bottom surface of the pushing ring 232 is provided with a jack 236 penetrating the guide tube 233 and movably connected with the pushing rod 234 at the corresponding position; the bottom end of each expansion rod 231 is rotatably connected with a sliding wheel 2310; there are three groups of expansion rods 231 between the outer tube 10 and the intermediate tube 11 and between the intermediate tube 11 and the inner tube 12;

[0051] As Figure 1 , 8 shown, the sampling assembly 3 comprises a sampling cylinder 30 movably arranged inside the inner tube 12 and a sampling cable 31 having one end connected with the top end of the sampling cylinder 30 and the other end penetrating the top of the inner tube 12; the inside of the sampling cylinder 30 is equally distributed with four sampling cavities 300, the side wall of the sampling cylinder 30 is provided with a through slot 301 at the position corresponding to each sampling cavity 300, and the inside of the side wall of the sampling cylinder 30 is provided with a pulling sleeve 32 at the position corresponding to each sampling cavity 300, the pulling sleeve 32 is provided with a filter screen portion 320 capable of being communicated with the through slot 301, and the top end of each pulling sleeve 32 is provided with a cross rod 321 slidably connected with the inner wall of the sampling cavity 300 at the corresponding position; the sampling cable 31 penetrates the sampling cylinder 30 and is connected with each cross rod 321 respectively.

[0052] Example 3

[0053] like Figure 1 , 4 A deep aquifer groundwater monitoring well is shown, comprising a well pipe 1, a connecting assembly 2 disposed at the end of the well pipe 1, and a sampling assembly 3 movably disposed inside the well pipe 1; the well pipe 1 includes an outer pipe 10 and an intermediate pipe 11 and an inner pipe 12 sequentially sleeved inside the outer pipe 10; water inlet holes 13 are provided through the side walls of the outer pipe 10, the intermediate pipe 11 and the inner pipe 12, and the height of the water inlet holes 13 on the outer pipe 10, the intermediate pipe 11 and the inner pipe 12 increases sequentially, and a filter screen 14 is provided on each water inlet hole 13; a positioning sleeve 15 is provided at the bottom end of the outer pipe 10, the intermediate pipe 11 and the inner pipe 12; a positioning groove 150 is provided on the bottom surface of each positioning sleeve 15;

[0054] like Figure 1 , 2, 4, 5, 6, 7, the connecting assembly 2 comprises a connecting seat 20 arranged at the bottom end of the outer tube 10 and a wellhead fixing seat 21 sleeved on the outer end of the outer tube 10; the upper end surface of the connecting seat 20 is provided with three threaded connecting sleeves 200 with decreasing inner diameters in turn, and the outer tube 10, the intermediate tube 11 and the inner tube 12 are respectively connected with each threaded connecting sleeve 200 through internal threads; the inside of the wellhead fixing seat 21 is sequentially provided with a first step portion 210 and a second step portion 211 from top to bottom; the upper end of the wellhead fixing seat 21 is provided with a well cover 22 movably connected with the first step portion 210, and the second step portion 211 movably connects a limiting assembly 23 connected with the outer tube 10, the intermediate tube 11 and the inner tube 12 respectively; the limiting assembly 23 comprises a mounting bracket 230 movably connected with the second step portion 211 through bolts, expansion rods 231 arranged on the lower bottom surface of the mounting bracket 230 and located between the outer tube 10 and the intermediate tube 11 and the intermediate tube 11 and the inner tube 12, and a push ring 232 arranged on the upper end of the mounting bracket 230 and connected with the expansion rods 231; the lower bottom surface of the mounting bracket 230 is provided with a guide tube 233 located between the outer tube 10 and the intermediate tube 11 and the intermediate tube 11 and the inner tube 12, the expansion rods 231 are arranged in pairs, and the two expansion rods 231 of each pair are movably hinged on both sides of the lower end of the guide tube 233, and the push rod 234 is movably connected between the two expansion rods 231 of each pair; the push ring 232 is threadedly connected with a rotating lead screw 235 rotatably connected with the upper end surface of the second step portion 211 on both sides, and the lower bottom surface of the push ring 232 is provided with a top rod 236 penetrating the guide tube 233 and movably connected with the push rod 234 at the corresponding position; the bottom end of each expansion rod 231 is rotatably connected with a sliding wheel 2310; four groups of expansion rods 231 are arranged between the outer tube 10 and the intermediate tube 11 and the intermediate tube 11 and the inner tube 12; the upper end surface of the connecting seat 20 is provided with a clamping groove 201 corresponding to the position of each positioning sleeve 15; the clamping groove 201 is provided with a positioning ball 202 movably connected with the positioning groove 150, and the lower end of each positioning ball 202 is provided with a damping spring 203 abutting against the clamping groove 201;

[0055] As Figure 1 、 8As shown, the sampling assembly 3 comprises a sampling cylinder 30 movably arranged inside the inner tube 12 and a sampling cable 31 connected to the top end of the sampling cylinder 30 and penetrating through the top of the inner tube 12; four sampling cavities 300 are equidistantly arranged inside the sampling cylinder 30, and a through slot 301 is arranged on the side wall of the sampling cylinder 30 and corresponds to the position of each sampling cavity 300, a pulling sleeve 32 is arranged inside the side wall of the sampling cylinder 30 and corresponds to the position of each sampling cavity 300, a filter screen part 320 capable of being communicated with the through slot 301 is arranged on the pulling sleeve 32, and a cross rod 321 is arranged at the top end of each pulling sleeve 32 and is slidably connected to the inner wall of the sampling cavity 300 at the corresponding position; the sampling cable 31 penetrates through the sampling cylinder 30 and is connected to each cross rod 321.

[0056] Embodiment 4

[0057] As shown in Figure 1 , 3 , a deep aquifer groundwater monitoring well, comprising a well pipe 1, a connecting assembly 2 arranged at the end of the well pipe 1, and a sampling assembly 3 movably arranged inside the well pipe 1; the well pipe 1 comprises an outer tube 10, an intermediate tube 11 and an inner tube 12 arranged in sequence inside the outer tube 10; water inlet holes 13 are arranged through the side walls of the outer tube 10, the intermediate tube 11 and the inner tube 12, and the heights of the water inlet holes 13 on the outer tube 10, the intermediate tube 11 and the inner tube 12 increase in sequence, and a filter screen 14 is arranged on each water inlet hole 13; a positioning sleeve 15 is arranged at the bottom end of the outer tube 10, the intermediate tube 11 and the inner tube 12; a positioning groove 150 is arranged on the lower bottom surface of each positioning sleeve 15; each filter screen 14 is movably connected to the water inlet hole 13 at the corresponding position, and a pulling spring 140 is arranged at the lower end of each filter screen 14 and connected to the outer tube 10, the intermediate tube 11 and the inner tube 12, respectively; a pulling rope 141 is arranged at the upper end of each filter screen 14 and penetrates through the outer tube 10, the intermediate tube 11 and the inner tube 12, respectively; a cleaning brush ring 16 is arranged at the upper end opening of the water inlet hole 13 and abuts against the filter screen 14 at the corresponding position; a pulling ring 17 is arranged at the upper end of the outer tube 10, the intermediate tube 11 and the inner tube 12 and connected to the pulling rope 141 at the corresponding position; the pulling rings 17 are fixedly connected between them;

[0058] As shown in Figure 1 , 2, 4, 5, 6, 7, the connecting assembly 2 comprises a connecting seat 20 arranged at the bottom end of the outer tube 10 and a wellhead fixing seat 21 sleeved on the outer end of the outer tube 10; the upper end surface of the connecting seat 20 is provided with three threaded connecting sleeves 200 with decreasing inner diameters in turn, and the outer tube 10, the intermediate tube 11 and the inner tube 12 are respectively connected with each threaded connecting sleeve 200 through internal threads; the inside of the wellhead fixing seat 21 is sequentially provided with a first step portion 210 and a second step portion 211 from top to bottom; the upper end of the wellhead fixing seat 21 is provided with a well cover 22 movably connected with the first step portion 210, and the second step portion 211 movably connects a limiting assembly 23 connected with the outer tube 10, the intermediate tube 11 and the inner tube 12 respectively; the limiting assembly 23 comprises a mounting bracket 230 movably connected with the second step portion 211 through bolts, expansion rods 231 arranged on the lower bottom surface of the mounting bracket 230 and located between the outer tube 10 and the intermediate tube 11 and between the intermediate tube 11 and the inner tube 12, and a pushing ring 232 arranged on the upper end of the mounting bracket 230 and connected with the expansion rods 231; the lower bottom surface of the mounting bracket 230 is provided with a guide tube 233 located between the outer tube 10 and the intermediate tube 11 and between the intermediate tube 11 and the inner tube 12, the expansion rods 231 are arranged in pairs, and the two expansion rods 231 of each pair are movably hinged on both sides of the lower end of the guide tube 233, and a pushing rod 234 is movably connected between the two expansion rods 231 of each pair; the pushing ring 232 is threadedly connected with a rotating lead screw 235 rotatably connected with the upper end surface of the second step portion 211 on both sides, and the lower bottom surface of the pushing ring 232 is provided with a jacking rod 236 penetrating the guide tube 233 and movably connected with the pushing rod 234 at the corresponding position; the bottom end of each expansion rod 231 is rotatably connected with a sliding wheel 2310; six pairs of expansion rods 231 are arranged between the outer tube 10 and the intermediate tube 11 and between the intermediate tube 11 and the inner tube 12; the upper end surface of the connecting seat 20 is provided with a clamping groove 201 corresponding to the position of each positioning sleeve 15; the clamping groove 201 is provided with a positioning ball 202 movably connected with the positioning groove 150, and the lower end of each positioning ball 202 is provided with a damping spring 203 abutting against the clamping groove 201;

[0059] As Figure 1 、 8As shown, the sampling assembly 3 comprises a sampling cylinder 30 movably arranged inside the inner tube 12 and a sampling cable 31 connected to the top end of the sampling cylinder 30 and penetrating through the top of the inner tube 12; the sampling cylinder 30 is provided with four sampling cavities 300 equidistantly arranged inside the sampling cylinder 30, and the side wall of the sampling cylinder 30 is provided with a through slot 301 corresponding to the position of each sampling cavity 300, and the inside of the side wall of the sampling cylinder 30 is provided with a pulling sleeve 32 corresponding to the position of each sampling cavity 300, the pulling sleeve 32 is provided with a filter screen part 320 capable of being communicated with the through slot 301, and the top end of each pulling sleeve 32 is provided with a horizontal rod 321 slidably connected with the inner wall of the sampling cavity 300 at the corresponding position; the sampling cable 31 penetrates through the sampling cylinder 30 and is connected with each horizontal rod 321.

[0060] Embodiment 5

[0061] As shown in Figure 1 , 3 , a deep aquifer groundwater monitoring well, comprising a well pipe 1, a connecting assembly 2 arranged at the end of the well pipe 1, and a sampling assembly 3 movably arranged inside the well pipe 1; the well pipe 1 comprises an outer tube 10, an intermediate tube 11 and an inner tube 12 successively arranged inside the outer tube 10; the side wall of the outer tube 10, the intermediate tube 11 and the inner tube 12 is provided with a water inlet hole 13, and the height of the water inlet hole 13 on the outer tube 10, the intermediate tube 11 and the inner tube 12 increases successively, and each water inlet hole 13 is provided with a filter screen 14; the bottom end of the outer tube 10, the intermediate tube 11 and the inner tube 12 is provided with a positioning sleeve 15; the lower bottom surface of each positioning sleeve 15 is provided with a positioning groove 150; each filter screen 14 is movably connected to the water inlet hole 13 at the corresponding position, and the lower end of each filter screen 14 is provided with a tension spring 140 connected with the outer tube 10, the intermediate tube 11 and the inner tube 12 respectively, and the upper end of each filter screen 14 is provided with a pulling rope 141 penetrating through the outer tube 10, the intermediate tube 11 and the inner tube 12 respectively, and the upper end opening of the water inlet hole 13 is provided with a cleaning brush ring 16 abutting against the filter screen 14 at the corresponding position; the upper end of the outer tube 10, the intermediate tube 11 and the inner tube 12 is provided with a pulling ring 17 connected with the pulling rope 141 at the corresponding position; each pulling ring 17 is fixedly connected; the outer tube 10, the intermediate tube 11 and the inner tube 12 are PVC tubes; the outer tube 10 is provided with a water stop expansion ring 18 arranged at the upper and lower ends of the water inlet hole 13;

[0062] As shown in Figure 1 , 2, 4, 5, 6, 7, the connecting assembly 2 includes a connecting seat 20 arranged at the bottom end of the outer tube 10 and a wellhead fixing seat 21 sleeved on the outer end of the outer tube 10; the upper end surface of the connecting seat 20 is provided with three threaded connecting sleeves 200 with decreasing inner diameters in sequence, and the outer tube 10, the intermediate tube 11 and the inner tube 12 are respectively connected with each threaded connecting sleeve 200 in one-to-one correspondence through internal threads; the inside of the wellhead fixing seat 21 is sequentially provided with a first step portion 210 and a second step portion 211 from top to bottom; the upper end of the wellhead fixing seat 21 is provided with a well cover 22 movably clamped with the first step portion 210, and the connecting portion of the well cover 22 and the first step portion 210 is provided with a locking bolt; the second step portion 211 movably clamps a limiting assembly 23 clamped with the outer tube 10, the intermediate tube 11 and the inner tube 12 respectively; the limiting assembly 23 includes a mounting bracket 230 movably connected with the second step portion 211 through a bolt, an expansion rod 231 arranged on the lower bottom surface of the mounting bracket 230 and located between the outer tube 10 and the intermediate tube 11 and the intermediate tube 11 and the inner tube 12, and a pushing ring 232 arranged on the upper end of the mounting bracket 230 and connected with the expansion rod 231; the lower bottom surface of the mounting bracket 230 is provided with a guide pipe 233 located between the outer tube 10 and the intermediate tube 11 and the intermediate tube 11 and the inner tube 12, the expansion rods 231 are arranged in pairs, and the two expansion rods 231 of each pair are movably hinged on both sides of the lower end of the guide pipe 233, and the pushing rod 234 is movably clamped between the two expansion rods 231 of each pair; the two sides of the pushing ring 232 are threadedly connected with the rotary lead screws 235 movably clamped with the upper end surface of the second step portion 211, and the lower bottom surface of the pushing ring 232 and the position corresponding to each guide pipe 233 are provided with the top rod 236 penetrating the guide pipe 233 and movably hinged with the pushing rod 234 at the corresponding position; the bottom end of each expansion rod 231 is movably clamped with a sliding wheel 2310; six groups of expansion rods 231 are arranged between the outer tube 10 and the intermediate tube 11 and the intermediate tube 11 and the inner tube 12; the upper end surface of the connecting seat 20 and the position corresponding to each positioning sleeve 15 are provided with a clamping groove 201; the clamping groove 201 is provided with a positioning ball 202 movably clamped with the positioning groove 150, and the lower end of each positioning ball 202 is provided with a damping spring 203 abutting with the clamping groove 201; the connecting seat 20, the wellhead fixing seat 21 and the limiting assembly 23 are all made of stainless steel material;

[0063] As Figure 1 、 8As shown, the sampling assembly 3 comprises a sampling cylinder 30 movably arranged inside the inner tube 12 and a sampling cable 31 having one end connected with the top end of the sampling cylinder 30 and the other end penetrating through the top of the inner tube 12; four sampling cavities 300 are equidistantly arranged inside the sampling cylinder 30, and a through slot 301 is arranged on the side wall of the sampling cylinder 30 and corresponds to the position of each sampling cavity 300; a pulling sleeve 32 is arranged inside the side wall of the sampling cylinder 30 and corresponds to the position of each sampling cavity 300, and a filter screen part 320 capable of being communicated with the through slot 301 is arranged on the pulling sleeve 32; the top end of each pulling sleeve 32 is provided with a cross rod 321 which is slidably connected with the inner wall of the sampling cavity 300 at the corresponding position; and the sampling cable 31 penetrates through the sampling cylinder 30 and is connected with each cross rod 321 respectively.

Claims

1. A deep-aquifer groundwater monitoring well characterized by, The utility model provides a kind of well pipe (1), connecting assembly (2) being arranged at the end of the well pipe (1) and movable sampling assembly (3) being arranged inside well pipe (1);The well pipe (1) includes outer tube (10) and middle tube (11) and inner tube (12) are successively set inside the outer tube (10);Water inlet hole (13) is arranged on the lateral wall of the outer tube (10), middle tube (11) and inner tube (12) in penetration, and the height of water inlet hole (13) on the outer tube (10), middle tube (11) and inner tube (12) increases in turn, each water inlet hole (13) is provided with filter screen (14); The connecting assembly (2) includes connecting seat (20) arranged at the bottom end of outer tube (10) and wellhead fixing seat (21) set on the outer end upper end of outer tube (10);3 thread connection sleeves (200) with gradually decreasing inner diameters are arranged on the upper end surface of connecting seat (20), and outer tube (10), middle tube (11) and inner tube (12) are threadedly connected with each thread connection sleeve (200) one by one;First step portion (210) and second step portion (211) are arranged in the wellhead fixing seat (21) from top to bottom in turn;Well lid (22) is movably connected with the first step portion (210) on the upper end of wellhead fixing seat (21), and limiting assembly (23) is movably connected with outer tube (10), middle tube (11) and inner tube (12) respectively on the second step portion (211); The sampling assembly (3) includes sampling cylinder (30) movably arranged inside inner tube (12) and sampling cable (31) with one end connected with the top end of sampling cylinder (30) and the other end penetrating the top of inner tube (12);A plurality of sampling cavities (300) are equidistantly distributed inside sampling cylinder (30), through slot (301) is arranged on the lateral wall of sampling cylinder (30) and corresponds to each sampling cavity (300), pulling sleeve (32) is arranged inside the lateral wall of sampling cylinder (30) and corresponds to each sampling cavity (300), filter screen part (320) capable of conducting through slot (301) is arranged on pulling sleeve (32), and the top end of each pulling sleeve (32) is provided with horizontal rod (321) movably connected with the inner wall of corresponding sampling cavity (300);Sampling cable (31) penetrates sampling cylinder (30) and is connected with each horizontal rod (321) respectively. The limiting assembly (23) comprises a mounting frame (230) movably connected with the second step portion (211) by a bolt, expansion rods (231) arranged on the lower bottom surface of the mounting frame (230) and located between the outer pipe (10) and the intermediate pipe (11) and between the intermediate pipe (11) and the inner pipe (12), and a pushing ring (232) arranged on the upper end of the mounting frame (230) and connected with the expansion rods (231); the lower bottom surface of the mounting frame (230) is provided with guide pipes (233) located between the outer pipe (10) and the intermediate pipe (11) and between the intermediate pipe (11) and the inner pipe (12), the expansion rods (231) are arranged in groups of two, and the two expansion rods (231) of each group are movably hinged on the two sides of the lower end of the guide pipe (233) respectively, and a pushing rod (234) is slidingly connected between the two expansion rods (231) of each group; the pushing ring (232) is threadedly connected with rotary lead screws (235) rotatably connected with the upper end surface of the second step portion (211) on the two sides thereof, and the lower bottom surface of the pushing ring (232) is provided with jack rods (236) penetrating through the guide pipes (233) and movably hinged with the pushing rods (234) at the positions corresponding to the guide pipes (233); The bottom ends of the outer pipe (10), the intermediate pipe (11) and the inner pipe (12) are provided with positioning sleeves (15); the lower bottom surface of each positioning sleeve (15) is provided with a positioning groove (150); the upper end surface of the connecting seat (20) and the positions corresponding to each positioning sleeve (15) are provided with clamping grooves (201); the clamping grooves (201) are provided with positioning balls (202) movably connected with the positioning grooves (150); the lower end of each positioning ball (202) is provided with a damping spring (203) abutting against the clamping groove (201); Each filter screen (14) is movably connected with the water inlet hole (13) at the corresponding position, the lower end of each filter screen (14) is provided with a pull spring (140) connected with the outer pipe (10), the intermediate pipe (11) and the inner pipe (12) respectively, the upper end of each filter screen (14) is provided with a pull rope (141) penetrating through the outer pipe (10), the intermediate pipe (11) and the inner pipe (12) respectively, and the opening at the upper end of the water inlet hole (13) is provided with a cleaning brush ring (16) abutting against the filter screen (14) at the corresponding position; the upper ends of the outer pipe (10), the intermediate pipe (11) and the inner pipe (12) are provided with pull rings (17) connected with the pull ropes (141) at the corresponding positions.

2. The deep aquifer groundwater monitoring well of claim 1, wherein, The bottom end of each expansion rod (231) is rotatably connected with a sliding wheel (2310).

3. The deep aquifer groundwater monitoring well of claim 1, wherein, Between the outer pipe (10) and the intermediate pipe (11) and between the intermediate pipe (11) and the inner pipe (12), 3-6 groups of expansion rods (231) are arranged.

4. The deep aquifer groundwater monitoring well of claim 1, wherein, Each pull ring (17) is fixedly connected.

5. The deep aquifer groundwater monitoring well of claim 1, wherein, The well lid (22) is provided with a locking bolt at the connection with the first step portion (210).

6. The deep aquifer groundwater monitoring well of claim 1, wherein, The outer pipe (10), the intermediate pipe (11) and the inner pipe (12) are all PVC pipes; the connecting seat (20), the well mouth fixing seat (21) and the limiting component (23) are all made of stainless steel material.

Images