A groundwater collection device for geotechnical engineering and method of use

Abstract

This invention relates to the field of groundwater sampling devices, specifically a groundwater sampling device and its usage method for geological engineering. The device includes a sampler housing with several sampling chambers located on the upper part of the inner wall of the housing. Each sampling chamber has an inlet at its upper part, and a sealing rod is movably installed at the inlet. It also includes a lifting mechanism movably installed at the bottom of the sampler housing for removing the sampler housing from the groundwater. This groundwater sampling device for geological engineering uses the inherent water pressure difference between the shallow, middle, and deep groundwater layers as its driving force. Through a series of mechanical linkages involving a piston cylinder, piston rod, geared disc sleeve, gear set, driven rod, lever ring, and swing plate, the three sampling chambers can be independently opened and closed automatically and sequentially by lowering and pulling the rope, based on changes in water pressure. This achieves adaptive stratified water sampling, significantly simplifying field operations, reducing manual labor intensity, and significantly improving the automation level and efficiency of sampling.

Description

Technical Field

[0001] This invention relates to the field of groundwater collection devices, specifically a groundwater collection device for geological engineering and its usage method. Background Technology

[0002] In geological engineering exploration, hydrogeological surveys, and groundwater environmental monitoring, it is often necessary to collect water samples from different depths of groundwater bodies to analyze the water quality components, pollution distribution, and hydrogeological characteristics of shallow, middle, and deep groundwater. Current industry standards generally require stratified sampling of groundwater at three levels (upper, middle, and lower). By collecting water samples at different water levels, the water quality variation patterns of vertical aquifers can be accurately determined, providing reliable sample data support for geological engineering design, groundwater pollution control, and ecological environment assessment.

[0003] The following problems exist in the existing technology that have not been adequately solved: 1. Traditional stratified sampling equipment mostly relies on electronic control and sensor triggering or manual step-by-step operation. The damp and deep water environment underground can easily cause circuit failure and sensor malfunction, resulting in low reliability. The purely manual step-by-step opening of the water collection chamber involves many steps and a complex lowering and pulling process. Moreover, it cannot utilize the inherent water pressure difference at different water depths to achieve purely mechanical adaptive triggering for stratified collection, resulting in low automation and limited work efficiency. 2. Existing collection devices often have simple filters at the water inlet. In the field groundwater environment, there is silt, suspended solids, and impurities. Long-term sampling operations can easily cause the filter to become clogged with dirt, obstructing water flow. This not only reduces sampling efficiency but also leads to insufficient water intake in the collection chamber due to poor water flow, affecting the accuracy of the detection data. It usually requires repeated manual disassembly and cleaning, which is cumbersome, labor-intensive, and has poor applicability in complex field conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a groundwater collection device and its usage method for geological engineering, in order to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: a groundwater collection device for geological engineering, comprising a water sampler housing, wherein a plurality of collection chambers are provided on the upper part of the inner wall of the water sampler housing, and a water inlet is provided on the upper part of the collection chamber, and a sealing rod is movably installed at the water inlet position; It also includes: a lifting mechanism that is mounted on the bottom of the water sampler housing for removing the water sampler housing from the groundwater; The water intake mechanism, which is installed in the middle of the water sampler housing and works in conjunction with the lifting mechanism, is used to drive the sealing rod to release the seal on the collection chamber and collect groundwater.

[0005] Preferably, the lifting mechanism includes: a sleeve fixedly installed on the top of the water sampler housing, and a pull rope is movably inserted inside the sleeve; A lever symmetrically rotates and is located at the bottom of the water sampler housing. The bottom of the pull rope passes through the water sampler housing and is fixedly connected to a pad that drives the lever to deflect. An annular groove is formed inside the water sampler housing, and piston cylinders are fixedly connected to both sides of the annular groove. A sealing plate for sealing the end of the piston cylinder is slidably provided on the outer wall of the water sampler housing, and the surface of the sealing plate is hinged to the upper part of the adjacent lever. A piston rod is slidably disposed inside the piston cylinder, and a geared disc sleeve that rotates along the axis of the annular groove is hinged between the two piston rods; A driven rod is rotatably set in the middle of the water sampler housing and cooperates with the water intake mechanism. A gear set for transmission is movably connected between the lower part of the driven rod and the gear plate sleeve. A cam is fixedly sleeved on the lower part of the driven rod. A wedge-shaped push rod that fits against the surface of the cam is slidably set on the inner wall of the water sampler housing. Several brushes are rotatably mounted on the surface of the water sampler housing for cleaning the inlet, and the lower part of the brushes is in contact with the inclined surface of the corresponding wedge-shaped push rod.

[0006] Preferably, the lower part of the outer shell of the water sampler is symmetrically provided with waist-shaped grooves, and the two sealing plates are respectively slidably disposed inside the two waist-shaped grooves; A hinge pin is fixedly connected to the surface of the sealing plate, and a positioning plate that restricts the movement of the sealing plate is fixedly connected to the surface of the waist-shaped groove. The surface of the positioning plate and the upper part of the lever are both provided with hinge grooves, and the hinge pin is movably inserted between the two hinge grooves. A compression spring is fixedly connected between the bottom of the water sampler housing and the top of the pad.

[0007] Preferably, the gear sleeve is rotatably positioned at the center of the annular groove, and the outer ring of the gear sleeve is symmetrically and fixedly connected with U-shaped hinge blocks. The two U-shaped hinge blocks are respectively hinged and installed on the surfaces of the two piston rods, and a spring telescopic rod is fixedly connected between the end of the piston rod away from the piston cylinder and the inner wall of the annular groove. A circular groove is provided in the middle of the water sampler housing, and the lower part of the driven rod is rotatably disposed inside the circular groove along with the cam. The water sampler housing has three equidistant sliding grooves along the circumference in the middle, which are connected to the circular groove. There are three wedge-shaped push rods, which are slidably arranged inside the three sliding grooves respectively. The inner wall of the sliding groove is fixedly connected with a return spring that drives the wedge-shaped push rods to reset. The number of wedge-shaped push rods is consistent with the number of collection chambers and brush plates, and they correspond one-to-one. A filter screen that cooperates with the brush plate is installed on the surface of the water inlet.

[0008] Preferably, the gear set consists of a double-ended gear rod and a driven gear ring. The double-ended gear rod is rotatably disposed between a circular groove and an annular groove. The lower part of the double-ended gear rod meshes with the inner ring at the top of the gear disc sleeve. The driven gear ring is fixedly connected to the bottom of the driven rod and meshes with the upper part of the double-ended gear rod.

[0009] Preferably, the water intake mechanism includes: a movable groove formed on the upper part of the water sampler housing, and a lever ring is fixedly sleeved inside the movable groove extending from the upper part of the moving rod; The inclined sleeve rod is rotated between the collection chamber and the movable trough, and the end of the sealing rod away from the water inlet is fixedly connected to a ball-head pressure rod that cooperates with the inclined sleeve rod; A unidirectional rotating swing plate is set at the end of the inclined sleeve rod and engages with the lever ring.

[0010] Preferably, the driven rod is rotatably disposed between the movable groove and the circular groove via a connecting bearing, and a positioning rod for limiting the lever ring is installed on the inner bottom surface of the movable groove; The inclined sleeve rod is rotatably mounted between the collection chamber and the movable groove via a sealed bearing. A rectangular block is fixedly connected to the end of the inclined sleeve rod away from the sealing rod, and a groove is provided at the bottom of the rectangular block to restrict the unidirectional rotation of the swing plate. The swing plate is rotatably mounted inside the groove via a return torsion spring.

[0011] Preferably, a pad is fixedly connected to the inner top surface of the collection chamber, the sealing rod is movably inserted through the middle of the pad, and a return spring for driving the sealing rod to reset is movably sleeved on the surface of the pad; The sealing rod is tapered at one end of the inlet, and the middle part of the inner wall of the inlet is tapered. A drain valve is installed at the bottom of the collection chamber to facilitate the extraction of the collected groundwater.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, the inherent water pressure difference between the shallow, middle, and deep layers of groundwater is used as the driving force. Through the step-by-step mechanical linkage transmission of the piston cylinder, piston rod, gear plate sleeve, gear set, driven rod, lever ring, and swing plate, the three-layer sampling chamber can be independently opened and closed automatically by lowering and pulling the rope, taking advantage of water pressure changes. This achieves adaptive stratified water sampling, greatly simplifies the field operation process, reduces the intensity of manual operation, and significantly improves the degree of automation and efficiency of sampling.

[0013] In this invention, by utilizing water pressure to drive a cam to intermittently push a wedge-shaped push rod, which in turn drives the brush plate to swing back and forth, the device can automatically clean the mud, suspended matter, and various impurities attached to the surface of the inlet filter screen in real time. This effectively solves the drawback of traditional simple filters that are prone to clogging, ensuring smooth water flow at the inlet for a long time. It avoids problems such as insufficient water intake and inadequate water collection in the sampling chamber caused by filter clogging, ensuring the integrity of groundwater sampling and the accuracy of water quality test data. It eliminates the need for frequent manual disassembly of the device to clean the filter screen, saving tedious manual maintenance steps, reducing labor intensity, and adapting to muddy and complex field geological conditions. The device's environmental adaptability and long-term reliability are greatly improved. Attached Figure Description

[0014] Figure 1 This is a perspective view of the water sampler housing and lever of the present invention; Figure 2 This is a cross-sectional view of a portion of the water sampler housing and the pull rope of the present invention; Figure 3 This is a cross-sectional view of the water sampler housing and the annular groove of the present invention; Figure 4 This is a cross-sectional view of the piston cylinder and piston rod of the present invention; Figure 5 This is a perspective view of the toothed disc sleeve and gear assembly of the present invention; Figure 6 This is a cross-sectional view showing the positions of the water sampler housing and the wedge-shaped push rod of the present invention; Figure 7 This is a cross-sectional view showing the positions of the water sampler housing and the movable channel of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of the structure at point A in the middle; Figure 9 This is a cross-sectional view showing a partial position of the inclined sleeve and the rectangular block in this invention.

[0015] In the diagram: 1. Water sampler housing; 2. Sample collection chamber; 3. Inlet; 4. Sealing rod; 5. Lifting mechanism; 501. Sleeve; 502. Pull rope; 503. Lever; 504. Pad; 505. Annular groove; 506. Piston cylinder; 507. Sealing plate; 508. Piston rod; 509. Gear disc sleeve; 510. Driven rod; 511. Gear set; 512. Cam; 513. Wedge-shaped push rod; 514. 515. Brush plate; 516. Waist-shaped groove; 517. Hinge groove; 518. U-shaped hinge block; 519. Spring telescopic rod; 520. Filter screen; 521. Double-headed gear rod; 522. Driven gear ring; 6. Water intake mechanism; 601. Movable groove; 602. Toggle ring; 603. Inclined sleeve rod; 604. Ball head pressure rod; 605. Swing plate; 606. Rectangular block; 607. Groove; 608. Return spring. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figures 1 to 9 This invention provides a technical solution: a groundwater collection device for geological engineering, comprising a water sampler housing 1, with a plurality of collection chambers 2 formed in the upper part of the inner wall of the water sampler housing 1, and a water inlet 3 formed in the upper part of the collection chamber 2, with a sealing rod 4 movably installed at the water inlet 3. It should be noted that the sealing rod 4 seals the water inlet 3, and a one-way valve is installed on the top of the collection chamber 2. When groundwater enters the collection chamber 2 from inside the water inlet 3, the air inside the collection chamber 2 is discharged through the one-way valve, ensuring effective collection of groundwater. Furthermore, the water in the collection chamber 2 will not flow back through the one-way valve, and the one-way valve is a low-pressure venting valve that only releases air and is open at normal pressure, automatically closing after sampling is completed.

[0018] It also includes a lifting mechanism 5 that is movably installed at the bottom of the water sampler housing 1, for removing the water sampler housing 1 from the groundwater.

[0019] The water intake mechanism 6, which is installed in the middle of the water sampler housing 1 and cooperates with the lifting mechanism 5, is used to drive the sealing rod 4 to release the seal on the collection chamber 2 and collect groundwater.

[0020] In this embodiment, as Figures 1 to 9 As shown, the lifting mechanism 5 includes: a sleeve 501 fixedly installed on the top of the water sampler housing 1, and a pull rope 502 is movably inserted inside the sleeve 501; A lever 503 is symmetrically rotated and positioned at the lower part of the water sampler housing 1. The bottom of the pull rope 502 passes through the water sampler housing 1 and is fixedly connected to a pad 504 that drives the lever 503 to deflect. It should be noted that the pull rope 502 passes through the water sampler housing 1. First, the water sampler housing 1 is lowered to its limit position by the cooperation of the sleeve and the pull rope 502. Then, by pulling the pull rope 502, the water sampler housing 1 is moved upward to collect groundwater samples.

[0021] An annular groove 505 is formed inside the water sampler housing 1, and piston cylinders 506 are fixedly connected to both sides of the annular groove 505. A sealing plate 507 for sealing the end of the piston cylinder 506 is slidably provided on the outer wall of the water sampler housing 1, and the surface of the sealing plate 507 is hinged to the upper part of the adjacent lever 503. It should be noted that a counterweight is installed on the outer wall of the water sampler housing 1 to ensure that the water sampler housing 1 can sink stably inside the groundwater. At the same time, the counterweight is set so that when the pull rope 502 lifts the pad 504, the compression spring between the pad 504 and the water sampler housing 1 is compressed first, and the water sampler housing 1 is not lifted immediately. This ensures that the seal at the end of the piston cylinder 506 is released, and groundwater collection can begin. Only then can the pull rope 502 lift the water sampler to collect groundwater at different locations.

[0022] A piston rod 508 is slidably disposed inside the piston cylinder 506, and a geared sleeve 509 that rotates along the axis of the annular groove 505 is hinged between the two piston rods 508. It should be noted that when the sealing plate 507 releases the seal on the piston cylinder 506, water pressure will drive the piston rods 508 to move inside the piston cylinder 506, and during the movement of the two piston rods 508, the hinged geared sleeve 509 will drive to rotate inside the annular groove 505.

[0023] A driven rod 510, rotatably mounted in the middle of the water sampler housing 1 and cooperating with the water intake mechanism 6, is movably connected between the lower part of the driven rod 510 and the gear disc sleeve 509 for transmission via a gear set 511. A cam 512 is fixedly sleeved on the lower part of the driven rod 510, and a wedge-shaped push rod 513, which slidably conforms to the surface of the cam 512, is mounted on the inner wall of the water sampler housing 1. It should be noted that the rotating gear disc sleeve 509 drives the driven rod 510 and the cam 512 to rotate via the gear set 511, causing the cam 512 to intermittently compress the wedge-shaped push rod 513 and move it outward from the water sampler housing 1.

[0024] Several brush plates 514 are rotatably mounted on the surface of the water sampler housing 1 for cleaning the inlet 3, and the lower part of the brush plate 514 is in contact with the inclined surface of the corresponding wedge-shaped push rod 513. It should be noted that when the wedge-shaped push rod 513 is reciprocated by the squeezing of the cam 512, the inclined surface of the wedge-shaped push rod 513 contacts the lower part of the brush plate 514, driving the brush plate 514 to swing on the surface of the water sampler housing 1, cleaning the filter screen 519 at the inlet 3 and preventing the filter screen 519 from clogging. The lower part of the brush plate 514 is rod-shaped, and the arc surface of the rod contacts the inclined surface of the wedge-shaped push rod 513, reducing the friction during the engagement with the inclined surface of the wedge-shaped push rod 513.

[0025] In this embodiment, as Figures 1 to 9 As shown, the lower part of the outer shell 1 of the water sampler is symmetrically provided with waist-shaped grooves 515, and two sealing plates 507 are respectively slidably disposed inside the two waist-shaped grooves 515.

[0026] A hinge pin is fixedly connected to the surface of the sealing plate 507, and a positioning plate that restricts the movement of the sealing plate 507 is fixedly connected to the surface of the waist-shaped groove 515. Both the surface of the positioning plate and the upper part of the lever 503 have hinge grooves 516, and the hinge pin is movably inserted between the two hinge grooves 516. It should be noted that the middle part of the lever 503 is rotatably mounted on the surface of the water sampler housing 1 via a pin, and a return torsion spring is fixedly connected between the pin surface and the surface of the water sampler housing 1, facilitating the return movement of the lever 503 with the sealing plate 507. Sealing rubber is provided on the side of the sealing plate 507 near the piston cylinder 506 to ensure a sealing effect.

[0027] A compression spring is fixedly connected between the bottom of the water sampler housing 1 and the top of the pad 504.

[0028] In this embodiment, as Figures 1 to 9 As shown, the gear sleeve 509 is rotatably set at the center of the annular groove 505. The outer ring of the gear sleeve 509 is symmetrically and fixedly connected with U-shaped hinge blocks 517. The two U-shaped hinge blocks 517 are respectively hinged and installed on the surfaces of the two piston rods 508. A spring telescopic rod 518 is fixedly connected between the end of the piston rod 508 away from the piston cylinder 506 and the inner wall of the annular groove 505. It should be noted that: the gear sleeve 509 has a circular hole on its shaft that mates with the center of the annular groove 505. The circular hole of the gear sleeve 509 is used to mount the center of the annular groove 505 via a bearing. The two piston rods 508 are symmetrically arranged around the gear sleeve 509. When the two piston rods 508 are driven by water pressure and move relative to each other, the two piston rods 508 drive the gear sleeve 509 to rotate inside the annular groove 505. Due to the different water pressures on the spring telescopic rod 518 and the piston rod 508 at different water depths, the spring telescopic rod 518 returns to its original position with the piston rod 508 at different sampling water levels. Therefore, according to the change in water pressure, the piston... During the reset path of rod 508, three equidistantly distributed swing plates 605 triggers are set up through the cooperation of lifting mechanism 5 and water sampling mechanism 6, which can automatically realize sample collection at three different water locations; the spring telescopic rod 518 is equipped with a pre-tightening force adjustment structure, which can be calibrated on-site or at the factory according to the target sampling depth range. The calibration principle is: the thrust generated by the maximum hydrostatic pressure in the deep layer is greater than the spring pre-tightening force, and the net pressure difference corresponding to the minimum hydrostatic pressure in the shallow layer (deep pressure - shallow pressure) is less than the spring pre-tightening force. By adjusting the pre-compression amount, the device can be reliably compressed and reset within the preset depth range. This adjustment method and use adopt existing technology, which will not be described in detail here.

[0029] A circular groove is provided in the middle of the water sampler housing 1, and the lower part of the driven rod 510 is rotatably disposed inside the circular groove along with the cam 512.

[0030] The water sampler housing 1 has three equidistant grooves along its circumference at the center, which are connected to the circular grooves. Three wedge-shaped push rods 513 are provided, each slidably positioned inside one of the three grooves. A return spring 608, which drives the wedge-shaped push rods 513 to reset, is fixedly connected to the inner wall of each groove. It should be noted that the return spring 608 allows the cam 512 to reciprocate, driving the wedge-shaped push rods 513 to slide within the grooves. After the sealing plate 507 is opened, the open end of the piston cylinder 506 is directly connected to the groundwater outside the water sampler housing 1. Therefore, the pressure inside the piston cylinder 506 is always equal to the current ambient water pressure. When the water sampler housing 1 is lifted, the pressure inside the cylinder decreases synchronously with the decrease in water depth, providing a dynamic pressure differential condition for the spring telescopic rod 518 to push the piston rod 508 to reset.

[0031] The number of wedge-shaped push rods 513 is the same as that of the collection chamber 2 and the brush plate 514, and they correspond one-to-one. The surface of the water inlet 3 is equipped with a filter screen 519 that cooperates with the brush plate 514.

[0032] In this embodiment, as Figures 1 to 9 As shown, the gear set 511 consists of a double-ended gear rod 520 and a driven gear ring 521. The double-ended gear rod 520 is rotatably positioned between the circular groove and the annular groove 505. The lower part of the double-ended gear rod 520 meshes with the inner ring at the top of the gear disc sleeve 509. The driven gear ring 521 is fixedly connected to the bottom of the driven rod 510 and meshes with the upper part of the double-ended gear rod 520. It should be noted that, through the gear structure of the gear disc sleeve 509, the double-ended gear rod 520, and the driven gear ring 521, during the rotation of the piston rod 508 with the gear disc sleeve 509, the trajectory of the driven rod 510 under the transmission action of the gear set 511 can effectively cover the positions of the three collection chambers 2.

[0033] In this embodiment, as Figures 1 to 9 As shown, the water intake mechanism 6 includes: a movable groove 601 opened on the upper part of the water sampler housing 1, and a lever ring 602 is fixedly sleeved inside the movable groove 601 extending from the upper part of the moving rod 510.

[0034] A sloping sleeve rod 603, positioned between the collection chamber 2 and the movable trough 601, is rotated. A ball-head pressure rod 604, which mates with the sloping sleeve rod 603, is fixedly connected to the end of the sealing rod 4 furthest from the inlet 3. It should be noted that when the lever ring 602 drives the sloping sleeve rod 603 to rotate, the sloping surface of the sloping sleeve rod 603 engages with the ball-head pressure rod 604, driving the sealing rod 4 to move outwards from the water sampler housing 1, releasing the seal on the inlet 3 position, and allowing groundwater collection. Since the lever ring 602 contacts the three swing plates 605 respectively, sampling is achieved in the upper, middle, and lower areas of groundwater at a depth of approximately 10 meters, and the triggering time is fixed, a slight pause is made when the pull rope 502 raises the water sampler housing 1 to these three sampling positions to facilitate effective sampling.

[0035] A unidirectional rotating swing plate 605 is installed at the end of the inclined sleeve 603 and engages with the lever ring 602. It should be noted that when the driven rod 510 rotates counterclockwise with the lever ring 602, the swing plate 605 can rotate on its own on the surface of the inclined sleeve 603 without rotating the inclined sleeve 603. Conversely, when the driven rod 510 resets and rotates clockwise with the lever ring 602, the lever ring 602 will drive the swing plate 605 to rotate synchronously with the inclined sleeve 603, causing the inclined sleeve 603 to drive the ball head pressure rod 604 and the sealing rod 4 to move.

[0036] In this embodiment, as Figures 1 to 9 As shown, the driven rod 510 is rotatably mounted between the movable groove 601 and the circular groove via a connecting bearing. A positioning rod for limiting the position of the lever ring 602 is installed on the inner bottom surface of the movable groove 601. It should be noted that there are two positioning rods, which limit the starting and ending points of the lever ring 602's rotation with the driven rod 510. When the lever ring 602 is at either the starting or ending point, it can effectively pass over the adjacent swing plate 605, ensuring effective contact with the swing plate 605 during the next rotation.

[0037] The inclined sleeve 603 is rotatably mounted between the collection chamber 2 and the movable groove 601 via a sealed bearing. A rectangular block 606 is fixedly connected to the end of the inclined sleeve 603 away from the sealing rod 4. The lower part of the rectangular block 606 has a groove 607 that restricts the unidirectional rotation of the swing plate 605. The swing plate 605 is rotatably mounted inside the groove 607 via a return torsion spring. It should be noted that the groove 607 is a right-angled single-sided through groove. Through the cooperation of the groove 607 and the return torsion spring, when the lever ring 602 rotates clockwise, the swing plate 605 is compressed and can rotate inside the groove 607. Conversely, when the lever ring 602 rotates counterclockwise, the swing plate 605 is not restricted by the inner wall of the groove 607 and cannot rotate, thus causing the inclined sleeve 603 to rotate synchronously. The return torsion spring can then reset the swing plate 605 after rotation.

[0038] In this embodiment, as Figures 1 to 9 As shown, a pad is fixedly connected to the inner top surface of the collection chamber 2, the sealing rod 4 is movably inserted in the middle of the pad, and a return spring that drives the sealing rod 4 to reset is movably sleeved on the surface of the pad.

[0039] The sealing rod 4 is tapered at one end of the inlet 3, and the middle part of the inner wall of the inlet 3 is also tapered. It should be noted that the tapered surface and the tapered end of the sealing rod 4 enable the sealing rod 4 to effectively self-seal the inlet 3 under the pressure of the groundwater.

[0040] A drain valve is installed at the bottom of the collection chamber 2 to facilitate the extraction of the collected groundwater.

[0041] In this embodiment, as Figures 1 to 9 As shown, a method for using a groundwater collection device for geological engineering includes the following steps:

[0042] S1. During the operational phase, the water sampler housing 1 is lowered to the target groundwater detection depth point via the casing 501. When the water sampler housing 1 reaches its travel limit, the pull rope 502 is initially pulled upwards to axially displace the pad 504. Under the self-weight stabilizing effect of the external counterweight block of the water sampler housing 1, the water sampler housing 1 remains stationary and does not move upwards synchronously with the pull rope 502. Under this condition, the compression spring located between the water sampler housing 1 and the pad 504... Under compression, the upward-moving pad 504 synchronously drives the lower end of the levers 503 symmetrically arranged on the left and right sides of the water sampler housing 1 to deflect. The upper end of the lever 503 is hinged with the hinge pin and the hinge groove 516, which pulls the sealing plate 507 to slide along the trajectory defined by the waist-shaped groove 515, thereby releasing the sealing state of the sealing plate 507 on the piston cylinder 506. Under the action of the hydrostatic pressure of the groundwater, the water pressure pushes the piston rod 508 into the inner cavity of the piston cylinder 506 to perform axial sliding movement.

[0043] S2. When the piston rod 508 generates relative displacement, the two sets of piston rods 508 inside the annular groove 505 move in opposite directions, and are driven by the U-shaped hinge block 517 to rotate the gear sleeve 509. The gear sleeve 509 transmits power through the gear meshing pair between the double-headed gear rod 520 and the driven gear ring 521, driving the driven rod 510 to rotate synchronously, so that the cam 512 fixed on the surface of the driven rod 510 presses the end of the wedge-shaped push rod 513 in an intermittent pushing manner. The wedge-shaped push rod 513 extends outward from inside the water sampler housing 1. During the outward extension of the wedge-shaped push rod 513, its inclined structure forms an inclined contact transmission with the lower end of the brush plate 514, driving the brush plate 514 to deflect at an angle around the assembly fulcrum on the outside of the water sampler housing 1. The brush plate 514 performs a cleaning operation on the filter screen 519 at the water inlet 3 of the collection chamber 2, effectively avoiding filter screen clogging and ensuring the flow efficiency and collection stability of groundwater sampling operations.

[0044] S3. After the water sampler housing 1 sinks to the deep groundwater layer, the high hydrostatic pressure in the deep layer continues to act and drive the piston rod 508 to slide to its travel limit position. Through the speed change transmission logic of the gear set 511, the driven rod 510 and the lever ring 602 are driven to rotate synchronously to the limit position. After the pull rope 502 pulls the pad 504 to the bottom limit travel position of the water sampler housing 1, the pull rope 502 continues to rise and drives the entire water sampler housing 1 to be pulled upward synchronously and slowly. When the water sampler housing 1 rises to the preset sampling layer, the external hydrostatic pressure gradually decreases, the spring telescopic rod 518 releases elastic potential energy and drives the piston rod 508 to reset and slide inside the piston cylinder 506. During the reset process of the piston rod 508, the hinged matching U-shaped... The hinge block 517, gear sleeve 509, gear set 511, and driven rod 510 perform a reset rotation. In the reset state, the driven rod 510, relying on the pushing action of the lever ring 602, drives the swing plate 605 within the motion trajectory range to produce an angular deflection. The swing plate 605 drives the inclined sleeve rod 603 to rotate synchronously. The inclined sleeve rod 603 drives the ball head pressure rod 604 and the sealing rod 4 to move axially towards the outside of the water inlet 3 through the inclined surface pushing transmission, releasing the sealing and locking state of the water inlet 3. The groundwater of the corresponding layer is then introduced into the inner cavity of the collection chamber 2 to complete automatic sampling and collection. After the water inside the collection chamber 2 is filled and the internal and external pressure is balanced, the spring releases the elastic driving force, driving the sealing rod 4 to reset and return to its original position, thus re-sealing the water inlet 3.

[0045] S4. The three sets of sampling chambers 2 are evenly distributed around the outer periphery of the water sampler housing 1 along the circumference. During the process of the driven rod 510 driving the lever ring 602 to rotate back to the initial reference position, they can sequentially form a linkage with the sealing rods 4 corresponding to the three sets of sampling chambers 2. Each sealing rod 4 releases its seal sequentially according to the change of hydrostatic pressure in different water layers, completing the independent collection of groundwater at different water levels in layers. This significantly improves the automation level and efficiency of sampling, and avoids problems such as circuit failure, sensor malfunction, and electronic component failure caused by the damp and deep water complex environment in the well. After sampling is completed, the water sampler housing 1 is lifted out as a whole with the help of the pull rope 502. The drain valve configured in each sampling chamber 2 can be opened to export and use the groundwater samples collected in the chamber.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A groundwater collection device for geological engineering, comprising a water sampler housing (1), wherein a plurality of collection chambers (2) are provided on the upper part of the inner wall of the water sampler housing (1), and an inlet (3) is provided on the upper part of the collection chamber (2), and a sealing rod (4) is movably installed at the inlet (3). characterized in that Also includes: The lifting mechanism (5) installed at the bottom of the water sampler housing (1) is used to remove the water sampler housing (1) from the groundwater. The water intake mechanism (6), which is installed in the middle of the water sampler housing (1) and cooperates with the lifting mechanism (5), is used to drive the sealing rod (4) to release the seal on the collection chamber (2) and collect groundwater.

2. The groundwater harvesting device for geotechnical engineering according to claim 1, characterized in that: The lifting mechanism (5) includes: a sleeve (501) fixedly installed on the top of the water sampler housing (1), and a pull rope (502) is movably inserted inside the sleeve (501). A lever (503) is symmetrically rotated and installed at the lower part of the water sampler housing (1). The bottom of the pull rope (502) passes through the water sampler housing (1) and is fixedly connected to a pad (504) that drives the lever (503) to deflect. An annular groove (505) is formed inside the water sampler housing (1), and piston cylinders (506) are fixedly connected to both sides of the annular groove (505). A sealing plate (507) for sealing the end of the piston cylinder (506) is slidably provided on the outer wall of the water sampler housing (1), and the surface of the sealing plate (507) is hinged to the upper part of the adjacent lever (503). A piston rod (508) is slidably disposed inside the piston cylinder (506), and a gear sleeve (509) that rotates along the axis of the annular groove (505) is hinged between the two piston rods (508). A driven rod (510) is rotatably disposed in the middle of the water sampler housing (1) and cooperates with the water intake mechanism (6). A gear set (511) for transmission is movably connected between the lower part of the driven rod (510) and the gear plate sleeve (509). A cam (512) is fixedly sleeved on the lower part of the driven rod (510). A wedge-shaped push rod (513) that fits against the surface of the cam (512) is slidably disposed on the inner wall of the water sampler housing (1). Several brush plates (514) are rotatably mounted on the surface of the water sampler housing (1) for cleaning the inlet (3), and the lower part of the brush plates (514) is in contact with the inclined surface of the corresponding wedge-shaped push rod (513).

3. A groundwater harvesting device for geotechnical engineering according to claim 2, characterised in that: The lower part of the outer shell (1) of the water sampler is symmetrically provided with waist-shaped grooves (515), and the two sealing plates (507) are respectively slidably disposed inside the two waist-shaped grooves (515); A hinge pin is fixedly connected to the surface of the sealing plate (507), and a positioning plate that restricts the movement of the sealing plate (507) is fixedly connected to the surface of the waist-shaped groove (515). The surface of the positioning plate and the upper part of the lever (503) are both provided with hinge grooves (516), and the hinge pin is movably inserted between the two hinge grooves (516). A compression spring is fixedly connected between the bottom of the water sampler housing (1) and the top of the pad (504).

4. The groundwater harvesting device for geotechnical engineering according to claim 3, characterized in that: The gear sleeve (509) is rotatably set at the center of the annular groove (505). The outer ring of the gear sleeve (509) is symmetrically fixedly connected with U-shaped hinge blocks (517). The two U-shaped hinge blocks (517) are respectively hinged to the surfaces of the two piston rods (508). A spring telescopic rod (518) is fixedly connected between the end of the piston rod (508) away from the piston cylinder (506) and the inner wall of the annular groove (505). A circular groove is provided in the middle of the water sampler housing (1), and the lower part of the driven rod (510) is rotatably disposed inside the circular groove along with the cam (512); The water sampler housing (1) has three grooves that are equidistant from each other along the circumference in the middle. There are three wedge-shaped push rods (513). The three wedge-shaped push rods (513) are slidably arranged inside the three grooves respectively. The inner wall of the groove is fixedly connected with a return spring (608) that drives the wedge-shaped push rods (513) to reset. The number of wedge-shaped push rods (513) is the same as that of the collection chamber (2) and the brush plate (514) and they correspond one-to-one. The surface of the water inlet (3) is equipped with a filter screen (519) that cooperates with the brush plate (514).

5. A groundwater collection device for geological engineering according to claim 4, characterized in that: The gear set (511) consists of a double-ended gear rod (520) and a driven gear ring (521). The double-ended gear rod (520) is rotatably disposed between the circular groove and the annular groove (505). The lower part of the double-ended gear rod (520) meshes with the inner ring at the top of the gear disc sleeve (509). The driven gear ring (521) is fixedly connected to the bottom of the driven rod (510) and meshes with the upper part of the double-ended gear rod (520).

6. A groundwater collection device for geological engineering according to claim 5, characterized in that: The water intake mechanism (6) includes: a movable groove (601) opened on the upper part of the water sampler housing (1), and a lever ring (602) is fixedly sleeved inside the movable groove (601) extending from the upper part of the moving rod (510). Rotate the inclined sleeve rod (603) set between the collection chamber (2) and the movable groove (601), and fix the end of the sealing rod (4) away from the water inlet (3) with a ball head pressure rod (604) that cooperates with the inclined sleeve rod (603). A unidirectional rotating swing plate (605) is provided at the end of the inclined sleeve (603) and cooperates with the lever ring (602).

7. A groundwater collection device for geological engineering according to claim 6, characterized in that: The driven rod (510) is rotatably disposed between the movable groove (601) and the circular groove via a connecting bearing. A positioning rod for limiting the lever ring (602) is installed on the inner bottom surface of the movable groove (601). The inclined sleeve rod (603) is rotatably mounted between the collection chamber (2) and the movable groove (601) via a sealed bearing. A rectangular block (606) is fixedly connected to one end of the inclined sleeve rod (603) away from the sealing rod (4). A groove (607) is provided at the lower part of the rectangular block (606) to restrict the unidirectional rotation of the swing plate (605). The swing plate (605) is rotatably mounted inside the groove (607) via a return torsion spring.

8. A groundwater collection device for geological engineering according to claim 7, characterized in that: A pad is fixedly connected to the inner top surface of the collection chamber (2), and the sealing rod (4) is movably inserted in the middle of the pad. A restoring spring for driving the sealing rod (4) to reset is movably sleeved on the surface of the pad. The sealing rod (4) is tapered at one end of the inlet (3), and the middle part of the inner wall of the inlet (3) is tapered. A drain valve is installed at the bottom of the collection chamber (2) to facilitate the extraction of the collected groundwater.

9. A method of using a groundwater collection device for geological engineering, characterized in that, Using a groundwater collection device for geological engineering as described in any one of claims 1-8 includes the following steps: S1. During operation, the water sampler housing (1) is lowered to the target depth through the sleeve (501). After reaching the limit position, the pull rope (502) is pulled up to pull the pad (504) upward. The water sampler housing (1) remains stationary due to the counterweight. The compression spring is loaded, and the pad (504) drives the lower end of the lever (503) to deflect. The upper end is engaged with the hinge groove (516) through the hinge pin. The sealing plate (507) is pulled to slide along the waist-shaped groove (515), releasing the seal on the piston cylinder (506). The water pressure pushes the piston rod (508) to slide axially. S2. The piston rod (508) moves in opposite directions and drives the gear sleeve (509) to rotate through the U-shaped hinge block (517). Through the double-headed gear rod (520) and the driven gear ring (521), the driven rod (510) and the cam (512) intermittently push the wedge-shaped push rod (513) to extend. The inclined surface of the wedge-shaped push rod (513) drives the brush plate (514) to deflect, cleaning the filter screen (519) and preventing clogging. S3. Deep water pressure drives the piston rod (508) to its limit, which drives the driven rod (510) and the lever ring (602) to rotate via the gear set (511). The pull rope (502) lifts the water sampler housing (1) to the sampling layer. The water pressure decreases, and the spring telescopic rod (518) drives the piston rod (508) to reset. The driven rod (510) is reset via the U-shaped hinge block (517), the gear plate sleeve (509), and the gear set (511). The lever ring (602) pushes the swing plate (605), causing the inclined sleeve rod (603) to drive the ball head pressure rod (604) and the sealing rod (4) to move outward, opening the water inlet (3) to complete sampling. Then the spring is restored to reset the sealing rod (4) and seal it. S4. The three collection chambers (2) are evenly distributed on the outer periphery of the water sampler shell (1). When the driven rod (510) drives the lever ring (602) to rotate, it is linked with the three sealing rods (4) in sequence. Water samples are collected independently in the chambers according to the water pressure changes corresponding to different depth layers. After sampling, the water sampler shell (1) is pulled out and the drain valve is opened to export the sample.

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