Sampling device for geological engineering underground water monitoring

Abstract

The invention relates to the technical field of geological drilling sampling, in particular to a geological engineering underground water monitoring sampling device which comprises a box, a supporting mechanism, a lifting mechanism and a drilling mechanism. The box bodies are distributed left and right and are provided with storage cavities for containing samples; the drilling mechanism comprises a base, a drill rod, a driving piece and a sampling piece; the drill rod is of a hollow structure; the driving part is used for being connected with the rotating shaft and driving the drill rod to conduct drilling operation with the rotating speed adjustable. The sampling piece comprises a liquid taking pipe and a sampling structure; a plurality of mounting cavities which are annularly and uniformly distributed are formed in the middle of the drill rod; the sampling structure comprises a sampling plate and a sampling driver; the sampling plate is mounted in the hollow inner cavity of the drill rod and is provided with a plurality of sampling vessels which are annularly and uniformly distributed; the sampling driver is used for driving the sampling plate to move upwards according to a preset speed and keeping the output end of the inner connecting pipe corresponding to the sampling vessel so as to complete multi-depth and multi-dimensional underground water sampling operation under single drilling operation.

Description

Technical Field

[0001] The invention relates to the technical field of geological drilling sampling, and in particular to a sampling device for groundwater monitoring in geological engineering. Background Art

[0002] The engineering geological problems caused by groundwater mainly include the following: 1. Ground subsidence: Artificially lowering the groundwater level will cause consolidation and subsidence of the surrounding soil layers. The filter screen and sand filter layer of the pumping well are not designed reasonably or the construction quality is poor. When pumping water, fine particles are brought out of the ground with groundwater, resulting in uneven subsidence of the surrounding ground soil layers, which in turn causes damage to ground buildings and underground pipelines. When pumping water, a precipitation funnel is formed, causing uneven subsidence or even cracking of surrounding buildings or underground pipelines. 2. Quicksand: When the dynamic water pressure is greater than the floating weight of the soil particles, the soil particles lose their own weight and are in a suspended state. This phenomenon is called quicksand. Quicksand will make it difficult to dig the foundation pit to the designed depth. In severe cases, it will cause the slope of the foundation pit to collapse, resulting in uneven subsidence and damage to surrounding buildings, roads, pipelines and other facilities. Quicksand may reduce the lateral friction resistance of the pile foundation and affect the bearing capacity of the pile. 3. Subsidence: When groundwater flows in the soil, it will scour and transport the soil particles, which can be divided into two types: mechanical subsidence and chemical subsidence. Mechanical erosion is mainly caused by the dynamic water pressure of groundwater. When the groundwater level reaches a certain level, the groundwater will carry away soil particles, forming soil holes, which may eventually cause ground collapse. Chemical erosion is caused by the dissolution and transportation of soluble salts in the soil by groundwater. Long-term action will reduce the strength and stability of the soil. 4. Foundation settlement: Changes in groundwater levels will cause compression and expansion of rock and soil layers, leading to foundation settlement. When the groundwater level drops, the rock and soil layers will lose water and produce dehydration shrinkage, causing the ground to sink; when the groundwater level rises, the rock and soil layers will absorb water and expand, causing the foundation to rise. This foundation settlement will cause the building to tilt, crack and be damaged. 5. Soil erosion: The seepage of groundwater will cause the dissolution and erosion of soil, especially when there are cracks or holes in the rock layer. Groundwater will enter the rock and soil layer through the cracks and holes and carry away rock and soil particles, causing soil loss and erosion. This soil erosion will weaken the stability of the rock and soil layer and increase the risks of bending, sliding and fracture of the soil. 6. Foundation pit surge: Rapid changes in groundwater levels may cause foundation pit surges, posing a threat to construction workers and equipment in the foundation pit. Therefore, it is often necessary to drill and sample groundwater for analysis in geological engineering operations. However, the existing groundwater drilling and sampling technologies are performed separately and separately, which is time-consuming and labor-intensive, and has low operating efficiency. At the same time, the storage of groundwater after sampling has strict sterility and temperature requirements. Workers generally use external insulated boxes for storage, but this method increases the amount of work that the staff has to carry, which is more laborious and easy to lose, resulting in a decrease in groundwater sampling efficiency. It is also impossible to achieve a reasonable, efficient, and quantitative sample storage effect based on the convenience of multi-depth and multi-dimensional groundwater sampling under a single drilling operation of the drill rod. For this reason, we need a sampling device for groundwater monitoring in geological engineering. Summary of the invention

[0003] In order to solve the above-mentioned shortcomings and deficiencies in the use of existing geological engineering drilling sampling technologies, the present invention provides a geological engineering groundwater monitoring sampling device with a reasonable structural design, which can realize multi-depth and multi-dimensional groundwater sampling under a single drilling operation of a drill rod, and achieve reasonable and efficient quantitative sample storage effect, thereby improving the efficiency of groundwater drilling and sampling operations.

[0004] The present invention adopts the following technical solutions to achieve the above purpose: A sampling device for groundwater monitoring in geological engineering, comprising a box, a supporting mechanism, a lifting mechanism and a drilling mechanism; the box is distributed on the left and right, and is provided with a storage cavity for holding samples; the supporting mechanism is used to drive the box to move to a preset outdoor sampling point and can complete position fixing; a mounting slot is provided in the middle of the box, and the lifting mechanism is vertically distributed and installed in the mounting slot, and the drilling mechanism comprises a base, a drill rod, a driving member and a sampling member; the base is horizontally distributed and connected to the bottom of the lifting mechanism; the inside of the drill rod is a hollow structure, and a cap is connected and installed at the top end, and the cap is connected to the base through a rotating shaft; the driving member is used to connect the rotating shaft and can adjust the rotation speed to drive the drill rod to perform drilling operations; the sampling member comprises a liquid collection tube and a sampling structure; the middle of the drill rod is provided with a plurality of evenly distributed rings An installation cavity, the liquid collection tube is adapted to be installed in the installation cavity, and the liquid collection tube includes an outer connecting tube, a central tube and an inner connecting tube which are distributed in sequence from the outside to the inside and have an integrally formed structure; the outer end of the outer connecting tube is flush with the end face of the drill pipe, and is provided with a filter, and a clamped butterfly valve is also provided on the outer connecting tube; the inner end of the inner connecting tube is flush with the inner cavity surface of the drill pipe, and an electromagnetic flow control valve is also provided on the inner connecting tube; a liquid pump is installed in the central tube through a bracket; the sampling structure includes a sampling plate and a sampling drive; there are multiple sampling plates, and each of the sampling plates is adapted to be installed in the hollow inner cavity of the drill pipe, and is provided with multiple sampling vessels evenly distributed in an annular shape; the sampling drive is used to drive the sampling plate to move up to a specified position at a preset speed and keep the output end of the inner connecting tube corresponding to the sampling vessel to complete multi-depth and multi-dimensional groundwater sampling operations under a single drilling operation.

[0005] Preferably: there are two storage cavities symmetrically distributed on the left and right, and each storage cavity is also provided with a plurality of partitions spaced apart from each other in an upper and lower manner; the plurality of partitions divide the storage cavity into sampling units; a groove for adapting to the sampling plate is provided in the center of the partition, and a plurality of through holes distributed in an annular manner are also provided on the partition and located on the outside of the groove.

[0006] Further preferably, the supporting mechanism comprises moving wheels and hydraulic telescopic legs; the moving wheels are mounted on the bottom of the box through brackets, and the hydraulic telescopic legs are telescopically fixedly mounted on one side of the box and can form a moving state and a fixed state of the box.

[0007] Further preferably, the lifting mechanism adopts a hydraulic cylinder, and a mounting seat is connected to the bottom end, a connecting rod is also provided at the bottom end of the mounting seat, and a fixed column is connected below the connecting rod; a slot adapted for connecting rod installation is provided at the upper end of the fixed column, and the two can be fixed by bolt connection; a connecting rod is also provided at the lower end of the fixed column, and the two are an integrally formed structure, and the connecting rod of the fixed column is connected and installed with the slot of the adjacent connected and installed fixed column; a fixing rod extending upward is provided on one side of the base, and a slot is also provided at the top of the fixing rod for connecting the fixed column.

[0008] Further preferably: a guide structure is provided between the back plate of the box and the mounting seat; the guide structure comprises a guide rod and a guide groove; the guide rod is provided on the mounting seat, the guide groove is opened on the back plate of the box and maintains a vertical distribution; the guide rod and the guide groove are matched and installed.

[0009] Further preferably, the cover cap and the rotating shaft are an integrally formed structure, the rotating shaft and the base are connected via a bearing; the cover cap and the drill rod are fixed via bolts.

[0010] Further preferably: the driving member includes a driving wheel, a driven wheel, a movable plate, a driving motor and an auxiliary shaft; the driven wheel is detachably mounted on the rotating shaft through a keyway, the movable plate is movably arranged on the base, the auxiliary shaft is rotatably arranged on the movable plate, the output shaft of the driving motor is connected to the auxiliary shaft, the driving wheel is sleeved on the auxiliary shaft, and keeps meshing and rotating with the driven wheel.

[0011] Further preferably, a slide rail is fixedly mounted on one side of the base by screws, and a slide plate is provided on one side of the movable plate, and the slide plate is mounted in matching relationship with the slide rail.

[0012] Further preferably: the sampling vessel on the sampling plate and the liquid collection tube are matched and installed in four groups evenly distributed in a ring; the output end of the inner tube is also provided with a connecting tube, and the connecting tube is a hose; a fixing groove is opened on the sampling plate, and the sampling vessel is fixedly installed in the fixing groove, and the top of the sampling vessel is 1-2 cm higher than the end face of the sampling plate; and the output end of the connecting tube is kept directly above the center of the sampling vessel in the sampling operation state.

[0013] Further preferably: the sampling drive includes a hydraulic lifting column, a driving plate, and a positioning groove; the hydraulic lifting column is fixedly installed on the bottom of the hollow inner cavity of the drill rod by bolts; the driving plate is fixedly installed on the top of the hydraulic lifting column; the positioning grooves are opened on the driving plate, and are four evenly distributed in a ring, and are distributed at a 45-degree angle with the adjacent fixed grooves; the upper end of the sampling plate is also provided with a positioning groove, and the lower end is provided with a positioning column; the positioning column of the adjacent sampling plate is matched and installed with the positioning groove of the sampling plate below; the positioning column of the lowest sampling plate is matched and installed with the positioning groove of the driving plate; the height of the positioning column is maintained at 5-6cm.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the sampling device has a reasonable structural design, adopts a split structure, simplifies assembly operations and manufacturing processes, and improves the dynamic balance of the structure; since the soil layer drilling and groundwater sampling structures are combined into one, the volume of the entire structure is relatively short, which saves structural space, and can compress the length by more than 50% compared with traditional groundwater sampling of the same power; further, through the cooperation of moving wheels and hydraulic telescopic legs, it is used to drive the box to move to a preset outdoor sampling point and complete position fixation, which is convenient to move when operating at different outdoor sampling points, and the operation efficiency is high; further, the storage cavity is divided into sampling units, and the sampling plate is adapted to be clamped and installed to ensure the stability of the sampled samples, while providing a sterile and low-temperature storage environment, combining the sample storage and sampling structure together for sampling. The overall structure of the sampling device is optimized and upgraded, and it is more practical. At the same time, a drill rod with a special structural design is further adopted. On the basis of ensuring soil drilling, a sampling plate, a sampling structure, and a sampling drive are installed inside. When groundwater sampling is required at the first preset depth, the drilling action of the drill rod stops, and the liquid pump is started. Through the cooperation of multiple sets of sampling tubes and sampling vessels, multi-directional groundwater sampling operations at the same depth of the borehole will be carried out, which is more conducive to subsequent groundwater monitoring and analysis operations. The sampling device fully realizes automated and intelligent drilling and groundwater sampling operations, drives the sampling plate to move up to the designated position at a preset speed, and keeps the output end of the inline tube corresponding to the sample vessel to complete multi-depth and multi-dimensional groundwater sampling operations under a single drilling operation, greatly improving the drilling efficiency of geological operations and the efficiency of groundwater monitoring and sampling operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the local structure of the present invention; Figure 3 A perspective view of a partition of the present invention; Figure 4 It is a three-dimensional structural diagram of the drilling mechanism of the present invention; Figure 5 is a schematic diagram of the lifting mechanism of the present invention; Figure 6 It is a connection structure diagram of the fixing column of the present invention; Figure 7 for Figure 4 A magnified view of the structure of part A; Figure 8 It is a cross-sectional structural diagram of a drill rod of the present invention; Fig. 9 for Figure 8 A magnified view of the structure of part B; Fig.10 This is a diagram of the sampling plate distribution structure of the present invention.

[0017] In the figure: 1, box body; 101, storage cavity; 102, mounting groove; 103, partition; 104, sampling unit; 105, groove; 106, through hole; 2, support mechanism; 21, moving wheel; 22, hydraulic telescopic leg; 3, lifting mechanism; 31, mounting seat; 32, connecting rod; 33, fixing column; 34, slot; 35, fixing rod; 4, drilling mechanism; 41, base; 42, drill rod; 43, driving member; 431, driving wheel; 432, driven wheel; 433, moving plate; 434, driving motor; 435, auxiliary shaft; 436, slide rail; 437, slide plate; 44, sampling part; 441, liquid collection tube; 442, sampling structure; 45, cover cap; 46, rotating shaft; 47, installation cavity; 51, external connection tube; 52, center tube; 53, internal connection tube; 54, filter screen; 55, wafer butterfly valve; 56, electromagnetic flow control valve; 57, liquid pump; 58, connecting pipe; 61, sampling plate; 611, sampling vessel; 612, fixing groove; 62, sampling drive; 7, guide structure; 71, guide rod; 72, guide groove; 81, hydraulic lifting column; 82, drive plate; 83, positioning groove; 84, positioning column. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that in the specific embodiments of the present invention, the terms such as "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the phrase "including one" or other defined elements that may appear does not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0020] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "provided with" that may appear should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0021] Example: Figures 1 to 10 As shown: A sampling device for groundwater monitoring in geological engineering, comprising a box 1, a supporting mechanism 2, a lifting mechanism 3 and a drilling mechanism 4; the sampling device has a reasonable structural design, adopts a split structure, simplifies assembly operations and manufacturing processes, and improves the dynamic balance of the structure; because the soil layer drilling and groundwater sampling structures are combined into one, the entire structure is relatively short, saving structural space, and the length can be compressed by more than 50% compared with traditional groundwater sampling of the same power. Figure 2 As shown: the box 1 is distributed on the left and right, and is provided with a storage cavity 101 for holding samples. The storage cavities 101 are two symmetrically distributed on the left and right, and each storage cavity 101 is also provided with a plurality of partitions 103 distributed in an upper and lower interval; the plurality of partitions 103 divide the storage cavity 101 into sampling units 104. Figure 3As shown: the center of the partition 103 is provided with a groove 105 adapted to the sampling plate 61, corresponding to a sampling unit 104 in which a group of sampling plates 61 or multiple groups of sampling plates 61 are placed. The multiple sampling vessels 611 in a group of sampling plates 61 correspond to groundwater sampling samples in different dimensions (different directions) at the same depth of the borehole. A plurality of through holes 106 distributed in an annular manner are also provided on the partition 103 and located on the outside of the groove 105. The purpose of such a setting is to ensure the consistency of the environment in the storage chamber 101. In this embodiment, preferably, in order to ensure the rationality of the storage of groundwater sampling samples, that is, the sterilization and low-temperature environment, a refrigeration device is arranged at the top of the box body 1, wherein the refrigeration device includes refrigeration components such as a compressor and a condenser, which are prior art and therefore will not be repeated. A manifold can also be arranged at the top of the box body 1, the input end of the manifold is connected to the refrigeration device to provide a cold source, and the output end of the manifold is connected to a branch pipe through a three-way joint, and the branch pipe is distributed left and right as a whole, leading to the left storage chamber 101 and the right storage chamber 101 respectively. At the same time, an ultraviolet sterilization lamp is also provided on the top of the storage cavity 101, and a temperature sensor is provided at the bottom of the storage cavity 101. The temperature sensor is connected to the refrigeration equipment to ensure the low temperature environment required by the storage cavity 101. Such a setting can avoid the staff from carrying additional external sample storage equipment, saving time and effort. Under the requirement of ensuring the storage environment of groundwater sampling samples, the storage cavity 101 is further divided into sampling units 104, and the sampling plate 61 is clamped and installed to ensure the stability of the sampled samples. At the same time, a sterile and low-temperature storage environment is provided, and the sample storage and sampling structures are combined together to optimize and upgrade the overall structure of the sampling device, which is more practical.

[0022] like Figure 2 As shown: In this embodiment, the support mechanism 2 is used to drive the box 1 to move to a preset outdoor sampling point and complete the position fixation. In a preferred embodiment, the support mechanism 2 includes a moving wheel 21 and a hydraulic telescopic leg 22. The moving wheel 21 is installed on the bottom of the box 1 through a bracket, and the hydraulic telescopic leg 22 is telescopically fixedly installed on one side of the box 1, and can form a moving state and a fixed state of the box 1. The hydraulic telescopic leg 22 adopts an electric hydraulic telescopic rod. Preferably, a towing hook can be set on one side of the box 1, and connected by an external towing device (tractor) to realize long-distance moving operations. Refer to Figure 1 As shown: when the sampling device is in a mobile state, the hydraulic telescopic legs 22 are retracted and the moving wheels 21 are in contact with the ground. This state can also be used for short-distance mobile operations for groundwater monitoring and sampling at different sampling calibration points in regional geological engineering operations. Figure 2As shown, when the sampling device is in a fixed state as a whole, that is, when the sampling device is in a drilling sampling operation as a whole, the hydraulic telescopic legs 22 are extended, so that the box body 1 and the moving wheels 21 are raised as a whole, and the moving wheels 21 are separated from the ground. Such a structure is convenient to move, stable to operate, simple to operate, and time-saving and labor-saving. At the same time, in this embodiment, the box body 1 can have a built-in battery, and the normal operation of the sampling device as a whole can also be achieved by connecting an external power supply.

[0023] like Figure 1 As shown: In this embodiment, the middle of the box body 1 is provided with a mounting groove 102, and the lifting mechanism 3 is vertically distributed and installed in the mounting groove 102. Preferably, the lifting mechanism 3 uses a hydraulic cylinder, and the hydraulic cylinder can preferably use the SY180-L multi-stage hydraulic cylinder provided by Dezhou Shunde Hydraulic Machinery Factory, which has a light structure and low operating noise. Figure 2 As shown: the bottom end of the hydraulic cylinder is connected to a mounting seat 31 to drive the mounting seat 31 to move up and down. Figure 5 and Figure 6 The structure shown is as follows: a connecting rod 32 is also provided at the bottom of the mounting seat 31, and a fixing column 33 is connected below the connecting rod 32; a slot 34 adapted to the installation of the connecting rod 32 is provided at the upper end of the fixing column 33, and the two can be fixed by bolt connection; a connecting rod 32 is also provided at the lower end of the fixing column 33, and the two are an integrated structure, and the connecting rod 32 of the fixing column 33 is connected and installed with the slot 34 of the adjacent fixing column 33 connected and installed; the purpose of such a setting is that the height of the drill rod 42 is generally small due to the special structure of the drill rod 42 and the cost limitation. Therefore, by connecting a plurality of fixing columns 33, connections of different lengths are completed to meet the requirements of geological drilling operations at different depths. A fixing rod 35 extending upward is provided on one side of the base 41, and the two can be fixedly connected and can be provided with reinforcing ribs. A slot 34 is also provided at the top of the fixing rod 35 for connecting the fixing column 33.

[0024] like Figure 4 As shown: In a preferred embodiment, a guide structure 7 is further provided between the back plate of the box body 1 and the mounting seat 31. The guide structure 7 includes a guide rod 71 and a guide groove 72. The guide rod 71 is arranged on the mounting seat 31, and the two are arranged in the same horizontal plane and can be fixed by welding. The guide groove 72 is opened on the back plate of the box body 1 and maintains a vertical distribution; the guide rod 71 is matched with the guide groove 72. Such a setting provides a good guiding effect for the movement of the mounting seat 31, thereby ensuring the stability of the subsequent drilling rod 42 downward drilling.

[0025] like Figure 1 , Figure 7 and Figure 8As shown in the figure: In this embodiment, the drilling mechanism 4 includes a base 41, a drill rod 42, a driving member 43 and a sampling member 44. The base 41 is horizontally distributed and connected to the lower part of the lifting mechanism 3. Figure 8 As shown: the cap 45 and the rotating shaft 46 are an integrally formed structure, and the rotating shaft 46 and the base 41 are connected by a bearing; so as to keep the rotating shaft 46 and the base 41 relatively rotatable but not relatively movable. The cap 45 and the drill rod 42 are fixed by bolts. In this embodiment, the interior of the drill rod 42 is a hollow structure, and the cap 45 is connected and installed on the top end, and the cap 45 and the base 41 are connected by the rotating shaft 46. The purpose of such a setting is to optimize and upgrade the drilling sampling structure by using a special groundwater sampling space on the basis of ensuring the stable drilling operation of the drill rod 42 itself. Figure 7 As shown: In this embodiment, the driving member 43 is used to connect the rotating shaft 46 and can drive the drill rod 42 to perform drilling operations at an adjustable rotation speed. The driving member 43 includes a driving wheel 431, a driven wheel 432, a movable plate 433, a driving motor 434 and an auxiliary shaft 435. The driven wheel 432 is detachably mounted on the rotating shaft 46 through a keyway, and can be auxiliaryly fixed by bolts. The movable plate 433 is movably arranged on the base 41, the auxiliary shaft 435 is rotatably arranged on the movable plate 433, and the output shaft of the driving motor 434 is connected to the auxiliary shaft 435, wherein the driving motor 434 adopts a servo control motor.

[0026] like Figure 7 As shown: the driving wheel 431 is sleeved and installed on the auxiliary shaft 435, and keeps meshing and rotating with the driven wheel 432. A slide rail 436 is fixedly installed on one side of the base 41 by screws, and a slide plate 437 is provided on one side of the movable plate 433, and the two are integrally formed. The slide plate 437 is matched and installed with the slide rail 436. The purpose of such a setting is that the staff found that in geological engineering operations, different drilling speeds are required for drilling operations in different soil conditions, and the groundwater drilling equipment in the prior art all adopts a fixed mode, and the drilling efficiency is poor. In severe cases, the drill rod will be damaged, resulting in the suspension of geological drilling operations. Therefore, this embodiment adopts a movable movable plate 433 to carry a drive motor 434, and specifically, the drive motor 434 is fixedly installed on the movable plate 433 through a motor mounting frame. The diameter of the driven wheel 432 is greater than that of the driving wheel 431. At the same time, the driven wheel 432 and the rotating shaft 46 are detachably connected. When the rotating shaft 46 and the drill rod 42 as a whole require different drilling speeds, driven wheel 432 structures of different diameters can be installed on the rotating shaft 46 to match the meshing transmission of the driving wheel 431, thereby completing the different drilling operation requirements of the drill rod 42 under different geological conditions. It has stronger adaptability and can better ensure the safety of the drill rod 42 itself and the drilling operation efficiency.

[0027] like Figure 8 As shown in the figure: In this embodiment, the sampling member 44 includes a liquid collection tube 441 and a sampling structure 442. The middle of the drill rod 42 is provided with a plurality of mounting cavities 47 evenly distributed in an annular shape, and the mounting cavities 47 keep the inside and outside of the drill rod 42 connected. The purpose of opening the mounting cavity 47 in the middle of the drill rod 42 is to facilitate the step-by-step elevation of the sampling plate inside the drill rod 42 and complete the automated sampling operation. Fig. 9 As shown: the liquid extraction pipe 441 is adapted to be installed in the installation cavity 47, and the liquid extraction pipe 441 includes an outer connection pipe 51, a central pipe 52 and an inner connection pipe 53 which are distributed in sequence from the outside to the inside and have an integrally formed structure. The outer end of the outer connection pipe 51 is flush with the outer end surface of the drill rod 42, and a filter screen 54 is provided. Such a setting does not affect the strength of the drilling operation of the drill rod 42, and the filter screen is provided to intercept large particles of impurities. A clamp butterfly valve 55 is also provided on the outer connection pipe 51; the clamp butterfly valve 55 is always kept closed when the drill rod 42 is in the drilling operation state. It will only be opened during the groundwater sampling operation. The inner end of the inner connection pipe 53 is flush with the inner cavity surface of the drill rod 42, and an electromagnetic flow control valve 56 is also provided on the inner connection pipe 53; in the initial state, the staff initializes the electromagnetic flow control valve to complete the quantitative automatic operation of groundwater monitoring sampling. A liquid pump 57 is installed in the central pipe 52 through a bracket; the liquid pump 57 can realize the groundwater sampling operation when it is turned on. The clamp butterfly valve 55 and the liquid pump 57 are operated by setting corresponding control switches or automatically controlled by a PLC controller. In a preferred embodiment, a filter bag can also be installed at the connection between the external connection pipe 51 and the central pipe 52, wherein the filter bag is connected to the central pipe 52 through a spiral pad to form a block. The filter bag mainly adopts a composition structure of an outer non-woven fabric and an inner activated carbon particle to block small particle impurities, avoid damage to the liquid pump, and further complete the filtering effect of groundwater monitoring sampling.

[0028] like Fig.10As shown: In this embodiment, the sampling structure 442 includes a sampling plate 61 and a sampling drive 62. There are multiple sampling plates 61, and each of the sampling plates 61 is adapted to be installed in the hollow inner cavity of the drill rod 42, and is provided with multiple sampling vessels 611 evenly distributed in an annular shape. Preferably, the sampling vessels 611 on the sampling plate 61 and the liquid collection tube 441 are matched and installed in four groups evenly distributed in an annular shape; the output end of the inner tube 53 is also provided with a connecting pipe 58, and the connecting pipe 58 is a hose; in this way, even if the up and down movement of the sampling plate 61 bends it, it can still be quickly reset after the previous sampling plate 61 moves out of position. A fixing groove 612 is provided on the sampling plate 61, and the sampling vessel 611 is fixedly installed in the fixing groove 612. Preferably, a first strong magnet block can be provided at the bottom of the sampling vessel 611, and a second strong magnet block can be provided at the fixing groove 612, and then the first strong magnet block and the second strong magnet block are adsorbed and fastened to complete the stable placement of the sampling vessel 611. The top of the sampling vessel 611 is 1-2 cm higher than the end surface of the sampling plate 61, and the output end of the connecting tube 58 is kept directly above the center of the sampling vessel 611 during the sampling operation. This arrangement facilitates the staff to take the samples separately and perform testing and analysis operations.

[0029] like Fig.10As shown: In this embodiment, the sampling drive 62 is used to drive the sampling plate 61 to move up to the specified position at a preset speed and keep the output end of the inner tube 53 corresponding to the sampling vessel 611 to complete the multi-depth and multi-dimensional groundwater sampling operation under a single drilling operation. Among them, the sampling drive 62 includes a hydraulic lifting column 81, a driving plate 82, and a positioning groove 83. The hydraulic lifting column 81 is fixedly installed at the bottom of the hollow inner cavity of the drill rod 42 by bolts; wherein, the hydraulic lifting column 81 adopts a small hydraulic cylinder carrying a high-precision displacement sensor, and specifically can adopt the SDMSS magnetostrictive displacement sensor-hydraulic cylinder provided by Shenzhen Xinwei Technology Development Co., Ltd., adopts a non-contact measurement method, has a long service life, strong environmental adaptability, and has the technical characteristics of high precision, high stability, high reliability and high repeatability. The purpose is to ensure the precise height of a single upward movement, and provide a strong foundation for the subsequent connection tube to correspond to the sampling vessel 611 for quantitative automatic sampling. The driving plate 82 is fixedly installed at the top of the hydraulic lifting column 81. The positioning grooves 83 are provided on the driving plate 82, and are four evenly distributed in an annular shape, and are distributed at an angle of 45 degrees with the adjacent fixing grooves 612; the upper end of the sampling plate 61 is also provided with a positioning groove 83, and the lower end is provided with a positioning column 84; the positioning column 84 of the adjacent sampling plate 61 is matched and installed with the positioning groove 83 of the lower sampling plate 61; the positioning column 84 of the lowermost sampling plate 61 is matched and installed with the positioning groove 83 of the driving plate 82; the height of the positioning column 84 is maintained at 5-6 cm. In this way, the sampling plate 61 can be provided with multiple layers, and stable support is provided by the cooperation of the positioning column 84 and the positioning groove 83, and a sufficiently large gap is provided to ensure the normal operation of groundwater sampling.

[0030] When the sampling device needs to sample groundwater at the first preset depth, that is, when the drill rod 42 reaches the first preset depth with the assistance of the lifting mechanism 3 and the driving motor 434, the drilling action of the drill rod 42 stops. In the initial state, the top sampling plate 61 is located in the middle of the inner cavity of the drill rod 42, and ensures that the output end of the connecting pipe 58 connected to the liquid collection pipe 441 corresponds to the sampling vessel 611 at the corresponding position. The liquid pump 57 is started, the clamp butterfly valve 55 is opened, and the groundwater outside the drill rod 42 begins to enter the connecting pipe 58 through the liquid collection pipe 441. Finally, with the assistance of the electromagnetic flow control valve 56, the quantitative groundwater sample is sampled and stored in the sampling vessel 611. That is, through the cooperation of multiple groups of liquid collection pipes 441 and sampling vessels 611, groundwater sampling operations at the same depth position of the borehole and in multiple directions are carried out, which is more conducive to the subsequent monitoring and analysis of groundwater. When the groundwater sampling of the first preset depth is completed, the liquid pump 57, the electromagnetic flow control valve 56 and the clamped butterfly valve 55 are all kept closed, and the hydraulic lifting column 81 is turned on to complete the upward movement of the initial setting of the specified spacing. At this time, the output end of the connecting pipe 58 connected to the liquid collection pipe 441 corresponds to the sampling vessel 611 on the second layer of the distribution sampling plate 61, preparing for the groundwater sampling of the second preset depth. And so on. The sampling device fully realizes the automation and intelligent drilling and groundwater sampling operations, drives the sampling plate 61 to move up to the specified position at a preset speed, and keeps the output end of the inner tube 53 corresponding to the sampling vessel 611 to complete the multi-depth and multi-dimensional groundwater sampling operation under a single drilling operation, which greatly improves the drilling efficiency of geological operations and the operation efficiency of groundwater monitoring sampling.

[0031] 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, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sampling device for groundwater monitoring in geological engineering, characterized in that: It includes a box body, a supporting mechanism, a lifting mechanism and a drilling mechanism; the box body is distributed on the left and right, and is provided with a storage cavity for holding samples; the supporting mechanism is used to drive the box body to move to a preset outdoor sampling point and can complete position fixing; a mounting groove is provided in the middle of the box body, and the lifting mechanism is vertically distributed and installed in the mounting groove, and the drilling mechanism includes a base, a drill rod, a driving member and a sampling member; the base is horizontally distributed and connected to the bottom of the lifting mechanism; the inside of the drill rod is a hollow structure, and a cap is connected and installed on the top end, and the cap is connected to the base through a rotating shaft; the driving member is used to connect the rotating shaft and can drive the drill rod to perform drilling operations at an adjustable rotation speed; the sampling member includes a liquid collection tube and a sampling structure; a plurality of mounting cavities evenly distributed in an annular manner are provided in the middle of the drill rod, and the liquid collection tube is provided with a plurality of mounting cavities evenly distributed in an annular manner. The tube is adapted to be installed in the installation cavity, and the liquid sampling tube includes an outer connecting tube, a central tube and an inner connecting tube which are distributed in sequence from the outside to the inside and are of an integrally formed structure; the outer end of the outer connecting tube is flush with the end face of the drill pipe, and is provided with a filter, and a clamped butterfly valve is also provided on the outer connecting tube; the inner end of the inner connecting tube is flush with the inner cavity surface of the drill pipe, and an electromagnetic flow control valve is also provided on the inner connecting tube; a liquid pump is installed in the central tube through a bracket; the sampling structure includes a sampling plate and a sampling drive; there are multiple sampling plates, and each of the sampling plates is adapted to be installed in the hollow inner cavity of the drill pipe, and is provided with multiple sampling vessels evenly distributed in an annular shape; the sampling drive is used to drive the sampling plate to move up to a specified position at a preset speed and keep the output end of the inner connecting tube corresponding to the sampling vessel to complete multi-depth and multi-dimensional groundwater sampling operations under a single drilling operation.

2. A sampling device for groundwater monitoring in geological engineering as claimed in claim 1, characterized in that: There are two storage cavities symmetrically distributed on the left and right, and each storage cavity is provided with a plurality of partitions spaced apart from each other in an upper and lower manner; the plurality of partitions divide the storage cavity into sampling units; a groove for adapting to the sampling plate is provided in the center of the partition, and a plurality of through holes distributed in an annular manner are provided on the partition and located on the outside of the groove.

3. A sampling device for groundwater monitoring in geological engineering as claimed in claim 2, characterized in that: The supporting mechanism comprises moving wheels and hydraulic telescopic legs; the moving wheels are mounted on the bottom of the box through brackets, and the hydraulic telescopic legs are telescopically fixedly mounted on one side of the box and can form a moving state and a fixed state of the box.

4. A sampling device for groundwater monitoring in geological engineering as claimed in claim 3, characterized in that: The lifting mechanism adopts a hydraulic cylinder, and a mounting seat is connected to the bottom end. A connecting rod is also provided at the bottom end of the mounting seat, and a fixed column is connected below the connecting rod; a slot adapted for connecting rod installation is provided at the upper end of the fixed column, and the two can be fixed by bolt connection; a connecting rod is also provided at the lower end of the fixed column, and the two are an integrally formed structure, and the connecting rod of the fixed column is connected and installed with the slot of the adjacent connected and installed fixed column; a fixing rod extending upward is provided on one side of the base, and a slot is also provided at the top end of the fixing rod for connecting the fixing column.

5. A sampling device for groundwater monitoring in geological engineering as claimed in claim 4, characterized in that: A guide structure is also provided between the back plate of the box and the mounting seat; the guide structure comprises a guide rod and a guide groove; the guide rod is arranged on the mounting seat, and the guide groove is opened on the back plate of the box and maintains a vertical distribution; the guide rod and the guide groove are matched and installed.

6. A sampling device for groundwater monitoring in geological engineering as claimed in claim 5, characterized in that: The cover cap and the rotating shaft are an integrally formed structure, the rotating shaft and the base are connected via a bearing, and the cover cap and the drill rod are fixed via bolts.

7. A sampling device for groundwater monitoring in geological engineering as claimed in claim 6, characterized in that: The driving member includes a driving wheel, a driven wheel, a movable plate, a driving motor and an auxiliary shaft; the driven wheel is detachably mounted on the rotating shaft through a keyway, the movable plate is movably arranged on a base, the auxiliary shaft is rotatably arranged on the movable plate, the output shaft of the driving motor is connected to the auxiliary shaft, the driving wheel is mounted on the auxiliary shaft, and keeps meshing and rotating with the driven wheel.

8. A sampling device for groundwater monitoring in geological engineering as claimed in claim 7, characterized in that: A slide rail is fixedly installed on one side of the base by screws, and a slide plate is provided on one side of the movable plate, and the slide plate is matched and installed with the slide rail.

9. A sampling device for groundwater monitoring in geological engineering as claimed in claim 8, characterized in that: The sampling vessels on the sampling plate and the liquid collection tubes are matched and installed in four groups evenly distributed in a ring; the output end of the inner tube is also provided with a connecting tube, and the connecting tube is a hose; a fixing groove is opened on the sampling plate, and the sampling vessel is fixedly installed in the fixing groove, and the top of the sampling vessel is 1-2 cm higher than the end face of the sampling plate; and the output end of the connecting tube is kept directly above the center of the sampling vessel in the sampling operation state.

10. A sampling device for groundwater monitoring in geological engineering as claimed in claim 9, characterized in that: The sampling drive includes a hydraulic lifting column, a driving plate, and a positioning groove; the hydraulic lifting column is fixedly installed at the bottom of the hollow inner cavity of the drill rod by bolts; the driving plate is fixedly installed at the top of the hydraulic lifting column; the positioning grooves are opened on the driving plate, and there are four of them are evenly distributed in a ring, and are distributed at a 45-degree angle with the adjacent fixed grooves; the upper end of the sampling plate is also provided with a positioning groove, and the lower end is provided with a positioning column; the positioning column of the adjacent sampling plate is matched and installed with the positioning groove of the sampling plate below; the positioning column of the lowest sampling plate is matched and installed with the positioning groove of the driving plate; the height of the positioning column is maintained at 5-6cm.

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