Hydrological observation well preparation tool and construction method

Abstract

The application discloses a hydrological observation well preparation tool and construction method, relates to the technical field of observation well construction, and solves the problems that the clamping structure of the well pipe is relatively complex when the water temperature observation well is prepared, even heavy driving equipment is needed, sometimes it is difficult to meet the actual needs according to local conditions, and the well pipe with different inner diameters cannot be matched. A hydrological observation well preparation tool and construction method, including a lifting block, the bottom end of the lifting block is provided with a clamping mechanism, the inner side of the clamping mechanism is provided with an adjusting mechanism, and the bottom end of the adjusting mechanism is provided with a transmission mechanism. The application can drive the relative movement of the two side screw rod movable sleeves by manually rotating the bidirectional screw rod, and can simultaneously open a plurality of clamping rods by matching the transmission structure of the adjusting rod, the rotating shaft and the adjusting groove, so that the anti-skid clamping pad is tightly attached to the inner wall of the well pipe, the large friction force is clamped, the well pipe is not slipped and deviated during the lifting and lowering process, and the clamping and fixing operation of the well pipe with different inner diameters is matched.

Description

Technical Field

[0001] This invention relates to the field of observation well construction, specifically to a tool for preparing and constructing a hydrological observation well. Background Technology

[0002] Hydrological observation wells are core infrastructure for groundwater dynamic monitoring, water resource assessment, and geological disaster early warning. In the vast plains, river valleys, and desert edges of my country, the hydrogeological conditions are dominated by Quaternary loose sedimentary layers, with strata mainly composed of alternating layers of clay soil and sand (fine sand, medium sand, and coarse sand). These areas are key monitoring areas for agricultural irrigation, urban and rural water supply, and ecological protection.

[0003] The existing well casing preparation process for hydrological observation wells involves complex clamping structures and even requires bulky drive equipment. This makes it difficult to adapt to local conditions and meet actual needs, and it is also not compatible with well casings of different inner diameters. Therefore, it does not meet the existing requirements. In response, we propose a tool and method for preparing hydrological observation wells. Summary of the Invention

[0004] The purpose of this invention is to provide a tool and method for preparing hydrological observation wells, in order to solve the problems mentioned in the background art, such as the complex clamping structure of the well pipe during the preparation of the well pipe for water temperature observation wells, which sometimes requires heavy driving equipment, making it difficult to meet actual needs according to local conditions, and being unable to adapt to the use of well pipes with different inner diameters.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a tool for preparing hydrological observation wells, comprising a lifting block, a clamping mechanism at the bottom end of the lifting block, an adjusting mechanism on the inner side of the clamping mechanism, a transmission mechanism at the bottom end of the adjusting mechanism, a limiting mechanism at the bottom of the transmission mechanism, and a well pipe on the outer side of the lifting block;

[0006] The clamping mechanism includes a fixed rod, a lifting groove, a clamping rod, and hinges. The bottom end of the lifting block is fixedly installed with a fixed rod. Eight hinges are provided on the surface of the fixed rod near the middle position. Clamping rods are provided on the outer surface of the fixed rod near the hinges.

[0007] Preferably, the outer ends of the clamping rods are provided with anti-slip clamping pads, and the two ends of the clamping rods are respectively hinged to the fixing rod and the anti-slip clamping pads through hinges, and the anti-slip clamping pads are in contact with the inner wall surface of the well pipe.

[0008] Preferably, the adjusting structure includes a lifting groove, an adjusting rod, a bidirectional lead screw, and a lead screw movable sleeve. The fixed rod is a hollow tube. A bidirectional lead screw is rotatably installed inside the fixed rod. The top end of the bidirectional lead screw movably passes through the top end of the lifting block and extends to the outside of the top end of the lifting block. The outer surface of the fixed rod is provided with multiple lifting grooves. A lead screw movable sleeve is movably installed near both ends of the outer surface of the bidirectional lead screw. Four adjusting rods are fixedly installed on the outer surface of each lead screw movable sleeve. Each adjusting rod movably passes through the interior of the lifting groove and extends to the outside of the fixed rod.

[0009] Preferably, the outer ends of the adjusting rods are rotatably mounted with shafts, the inner surfaces of the clamping rods are provided with adjusting grooves, and both ends of the shafts are movably engaged into the adjusting grooves.

[0010] Preferably, the transmission mechanism includes a pinion, a large gear, and a rack. The bottom end of the bidirectional lead screw is fixedly mounted with a pinion, and the bottom end of the pinion is provided with a base plate. The bottom end of the pinion is rotatably connected to the base plate. Two large gears are meshed on the outer surface of the pinion, and racks are meshed on the outer surfaces of the large gears. The racks are slidably mounted in the gap between the base plate and the pinion.

[0011] Preferably, the transmission mechanism further includes a connecting frame, rollers, and a fixed ring. The outer end of the rack is fixedly mounted with a connecting frame, and the connecting frame is rotatably mounted with a roller near the inner wall of the well pipe. The rollers are elastically fitted to the surface of the well pipe, and the bottom end of the connecting frame is fixedly mounted with a fixed ring.

[0012] Preferably, T-shaped grooves are provided on both sides of the base plate surface, and T-shaped sliders are fixedly installed at the bottom end of the rack. The T-shaped sliders are slidably inserted into the interior of the T-shaped grooves. Compression springs are movably installed between the T-shaped sliders and the interior of the T-shaped grooves. One end of the compression spring is connected to the T-shaped slider, and the other end of the compression spring is connected to the inner wall of the T-shaped groove.

[0013] Preferably, the limiting mechanism includes a mounting ring, a ratchet, and a pawl. The mounting ring is fixedly mounted on the bottom end of the base plate. The ratchet is rotatably mounted inside the mounting ring. The top end of the ratchet is fixedly connected to the bottom end of the pinion. The pawl is hinged to the inner surface of the mounting ring. A torsion spring is provided at the hinge position of the pawl.

[0014] Preferably, a lifting rod is fixedly installed at the top of the lifting block, and a lifting rope is provided on the top surface of the lifting rod.

[0015] A method for constructing a hydrological observation well preparation tool, the method comprising the following steps:

[0016] S1: First, move the device to the vicinity of the hydrological observation well using a crane and hoisting rope, and place the hoisting block inside the well pipe. At this time, the double-ended screw protruding from the top of the hoisting block can be rotated to move the screw sleeve in the lifting groove towards the center of the well pipe, thereby moving the adjusting rod inside the well pipe. The adjusting rod will then drive the clamping rod to rotate outward through the rotating shaft, thereby making the anti-slip clamping pad tightly fit against the inner wall surface of the well pipe, and clamping the well pipe through the friction of the anti-slip clamping pad.

[0017] S2: The device is then lifted using a crane and hoisting ropes, and the hoisting block clamps the well pipe, lowering it into the hydrological observation well. When the well pipe reaches the bottom of the observation well, the bottom of the fixing ring will strike the pre-placed positioning pipe or the top surface of the already placed well pipe at the bottom of the observation well. The fixing ring will be pushed inward, causing the rollers and rack to move along the T-shaped groove via the connecting frame. The rack surface will push the large gear, causing it to rotate. This, in turn, drives the small gear to rotate. The small gear, in turn, drives the bidirectional screw to rotate synchronously, causing the two screw movable sleeves to move towards both ends of the well pipe. This allows the adjusting rod to rotate the clamping rod inward via the rotating shaft. At this point, the anti-slip clamping pad separates from the inner wall of the well pipe, releasing the clamping of the well pipe. The crane can then lift the device again to clamp and install subsequent well pipes.

[0018] S3: When the rack drives the large gear to rotate, the small gear will drive the ratchet at the bottom of the base plate to rotate at the same time. This will cause the ratchet to lock in one direction through the pawl, preventing the small gear from rotating due to external force or other effects, which would result in the clamping rod not being released from the well pipe. After the device is removed from the observation well, the pawl can be manually moved to stop it from blocking the ratchet, so that the bidirectional screw can be rotated normally.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. This invention utilizes a two-way lead screw, a movable lead screw sleeve, and a clamping rod in cooperation. Manually rotating the two-way lead screw drives the movable lead screw sleeves on both sides to move relative to each other. Combined with the transmission structure of the adjusting rod, rotating shaft, and adjusting groove, multiple sets of clamping rods can be opened simultaneously, allowing the anti-slip clamping pad to fit tightly against the inner wall of the well pipe, achieving a high-friction gripping and ensuring that the well pipe does not slip or deviate during the hoisting and lowering process. It is suitable for clamping and fixing operations of well pipes with different inner diameters and has strong versatility.

[0021] 2. This invention utilizes a gear and rack transmission mechanism involving a small gear, a large gear, and a rack. After the well casing is lowered into place and the fixing ring touches the bottom and is subjected to pressure, the rack can be automatically pushed to slide. Through the gear set reversing transmission, the bidirectional lead screw is driven to rotate in the opposite direction, automatically retracting the clamping rod and releasing the well casing clamp. This achieves automatic unhooking of the well casing upon positioning, eliminating the need for manual unlocking downhole, significantly reducing the risks of downhole operations, and improving the efficiency of hydrological observation well casing splicing construction. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the well casing clamp of the present invention;

[0023] Figure 2 This is a diagram of the invention without the well casing being clamped;

[0024] Figure 3 This is a cross-sectional front view of the entire invention;

[0025] Figure 4 This is a cross-sectional front view of the fixed ring position of the present invention;

[0026] Figure 5 This is a top cross-sectional view of the position of the adjusting rod in this invention;

[0027] Figure 6 This is a top cross-sectional view of the pinion location in this invention;

[0028] Figure 7 This is a bottom cross-sectional view of the ratchet position of the present invention;

[0029] Figure 8 For the present invention Figure 4 A partial structural diagram of part A in the middle.

[0030] In the diagram: 1. Lifting block; 2. Lifting rod; 3. Fixing rod; 4. Lifting groove; 5. Adjusting rod; 6. Clamping rod; 7. Hinge; 8. Base plate; 9. Well casing; 10. Anti-slip clamping pad; 11. Two-way lead screw; 12. Adjusting groove; 13. Pinion; 14. Gear; 15. Rack; 16. Connecting frame; 17. Roller; 18. Fixing ring; 19. Lead screw movable sleeve; 20. Rotating shaft; 21. Mounting ring; 22. Ratchet; 23. Pawl; 24. T-shaped slider; 25. Compression spring; 26. T-shaped slide groove. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] Please see Figures 1 to 8An embodiment of the present invention provides a tool for preparing a hydrological observation well, comprising a lifting block 1, a clamping mechanism at the bottom end of the lifting block 1, an adjusting mechanism at the inner side of the clamping mechanism, a transmission mechanism at the bottom end of the adjusting mechanism, a limiting mechanism at the bottom of the transmission mechanism, and a well pipe 9 at the outer side of the lifting block 1.

[0033] The clamping mechanism includes a fixed rod 3, a lifting groove 4, a clamping rod 6, and a hinge 7. The fixed rod 3 is fixedly installed at the bottom end of the lifting block 1. Eight hinges 7 are provided on the surface of the fixed rod 3 near the middle position. Clamping rods 6 are provided on the outer surface of the fixed rod 3 near the hinges 7.

[0034] The outer ends of the clamping rods 6 are provided with anti-slip clamping pads 10. The two ends of the clamping rods 6 are respectively connected to the fixing rods 3 and the anti-slip clamping pads 10 through hinges 7. The anti-slip clamping pads 10 are in contact with the inner wall surface of the well pipe 9.

[0035] The adjustment structure includes a lifting groove 4, an adjusting rod 5, a double-acting screw 11, and a screw movable sleeve 19. The fixed rod 3 is a hollow tube. The double-acting screw 11 is rotatably installed inside the fixed rod 3. The top end of the double-acting screw 11 movably passes through the top end of the lifting block 1 and extends to the outside of the top end of the lifting block 1. The outer surface of the fixed rod 3 is provided with multiple lifting grooves 4. The screw movable sleeve 19 is movably installed on the outer surface of the double-acting screw 11 near both ends. Four adjusting rods 5 are fixedly installed on the outer surface of the screw movable sleeve 19. The adjusting rods 5 movably pass through the interior of the lifting groove 4 and extend to the outside of the fixed rod 3.

[0036] By cooperating with the bidirectional lead screw 11, the movable sleeve 19 of the lead screw, and the clamping rod 6, the bidirectional lead screw 11 can be manually rotated to drive the movable sleeves 19 on both sides to move relative to each other. With the transmission structure of the adjusting rod 5, the rotating shaft 20 and the adjusting groove 12, multiple sets of clamping rods 6 can be opened simultaneously, so that the anti-slip clamping pad 10 fits tightly against the inner wall of the well pipe 9, and achieves a high friction force to hold and clamp, ensuring that the well pipe does not slip or deviate during the hoisting and lowering process. It is suitable for clamping and fixing operations of well pipes with different inner diameters and has strong versatility.

[0037] The outer ends of the adjusting rods 5 are rotatably mounted with shafts 20, and the inner surfaces of the clamping rods 6 are provided with adjusting grooves 12. Both ends of the shafts 20 are movably inserted into the adjusting grooves 12.

[0038] The transmission mechanism includes a pinion 13, a large gear 14, and a rack 15. The pinion 13 is fixedly installed at the bottom end of the double-acting lead screw 11. The bottom end of the pinion 13 is provided with a base plate 8. The bottom end of the pinion 13 is rotatably connected to the base plate 8. Two large gears 14 are meshed on the outer surface of the pinion 13. The outer surface of each large gear 14 is meshed with a rack 15. The racks 15 are slidably installed in the gap between the base plate 8 and the pinion 13.

[0039] Through the gear and rack transmission of the small gear 13, large gear 14 and rack 15, after the well pipe is lowered into place and the fixing ring 18 touches the bottom and is pressed, the rack 15 can be automatically pushed to slide. Through the gear set reversing transmission, the bidirectional lead screw 11 is driven to rotate in the opposite direction, automatically retracting the clamping rod 6 and releasing the well pipe clamp, realizing the automatic unhooking of the well pipe in place. No manual unlocking is required in the well, which greatly reduces the risk of downhole operation and improves the efficiency of hydrological observation well pipe splicing construction.

[0040] The transmission mechanism also includes a connecting frame 16, a roller 17 and a fixed ring 18. The connecting frame 16 is fixedly installed on the outer end of the rack 15. The roller 17 is rotatably installed on the connecting frame 16 near the inner wall of the well pipe 9. The roller 17 is elastically fitted to the surface of the well pipe 9. The fixed ring 18 is fixedly installed on the bottom end of the connecting frame 16.

[0041] By fitting the roller 17 against the inner wall of the well pipe 9, the device can be guided by rolling during its up and down movement, avoiding hard friction and scratching between the device and the inner wall of the well pipe, effectively protecting the inner wall structure of the well pipe, and reducing the lifting resistance of the device, making the hoisting operation smoother and more stable.

[0042] Both sides of the base plate 8 are provided with T-shaped grooves 26. T-shaped sliders 24 are fixedly installed at the bottom of the rack 15. The T-shaped sliders 24 are slidably inserted into the interior of the T-shaped grooves 26. Compression springs 25 are movably installed between the T-shaped sliders 24 and the interior of the T-shaped grooves 26. One end of the compression spring 25 is connected to the T-shaped slider 24, and the other end of the compression spring 25 is connected to the inner wall of the T-shaped grooves 26.

[0043] With the T-shaped slider 24 and the compression spring 25 working together, the rack 15 can maintain stable guidance during the pressure sliding process. After the device is removed from the bottom of the well, the compression spring 25 can automatically push the rack 15 back to its original position by releasing the limit of the ratchet 22, so that the transmission structure and clamping structure can automatically return to the initial clamping state, which is convenient for continuous cyclic hoisting and splicing of multiple well pipes.

[0044] The limiting mechanism includes a mounting ring 21, a ratchet 22, and a pawl 23. The mounting ring 21 is fixedly mounted on the bottom end of the base plate 8. The ratchet 22 is rotatably mounted inside the mounting ring 21. The top end of the ratchet 22 is fixedly connected to the bottom end of the pinion 13. The pawl 23 is hinged to the inner surface of the mounting ring 21. A torsion spring is provided at the hinge position of the pawl 23.

[0045] Through the one-way limiting cooperation of ratchet 22 and pawl 23, the device can form a one-way lock on the gear set and the two-way screw 11 during the automatic unlocking process. This effectively counteracts the structural rotation problem caused by external forces such as hoisting vibration, well wall friction, and water disturbance, prevents the clamping structure from being accidentally reset midway and the well pipe from falling off prematurely, and ensures the construction stability and safety of the entire process of lowering and positioning the well pipe, eliminating the hidden dangers of pipe falling and well position deviation.

[0046] A lifting rod 2 is fixedly installed on the top of the lifting block 1, and a lifting rope is provided on the top surface of the lifting rod 2.

[0047] A method for constructing a hydrological observation well preparation tool, comprising the following steps:

[0048] S1: First, move the device to the vicinity of the hydrological observation well using a crane and hoisting rope, and place the hoisting block 1 inside the well pipe 9. At this time, the double-ended screw 11 protruding from the top of the hoisting block 1 can be rotated to drive the screw movable sleeve 19 to move from the position of the lifting groove 4 toward the center of the well pipe 9, thereby driving the adjusting rod 5 to move inside the well pipe 9. At this time, the adjusting rod 5 will drive the clamping rod 6 to rotate outward through the rotating shaft 20, thereby making the anti-slip clamping pad 10 tightly fit with the inner wall surface of the well pipe 9, and clamping the well pipe 9 by the friction of the anti-slip clamping pad 10.

[0049] S2: Subsequently, the device is lifted using a crane and hoisting rope, and the hoisting block 1 clamps the well pipe 9, lowering it into the hydrological observation well. Once the well pipe 9 reaches the bottom of the observation well, the bottom end of the fixing ring 18 will impact the pre-placed positioning pipe at the bottom of the observation well or the top surface of the already placed well pipe 9. At this point, the fixing ring 18 will be pushed inwards, causing the roller 17 and rack 15 to move along the T-shaped groove 26 via the connecting frame 16. Simultaneously, the surface of the rack 15 will push the large tooth... The large gear 14 rotates, which in turn drives the small gear 13 to rotate. When the small gear 13 rotates, it drives the double-acting screw 11 to rotate synchronously, which in turn causes the two screw movable sleeves 19 to move to both ends of the well pipe 9 respectively. This causes the adjusting rod 5 to drive the clamping rod 6 to rotate inward through the rotating shaft 20. At this time, the anti-slip clamping pad 10 separates from the inner wall of the well pipe 9, thereby releasing the clamping of the well pipe 9. The crane can then raise the device again to clamp and install the subsequent well pipe 9.

[0050] S3: When the rack 15 pushes the large gear 14 to rotate, the small gear 13 will drive the ratchet 22 at the bottom of the base plate 8 to rotate at the same time. This causes the ratchet 22 to be locked in one direction by the pawl 23, preventing the small gear 13 from rotating due to external force or other actions, which would result in the clamping rod 6 not being released from the well pipe 9. After the device is removed from the observation well, the pawl 23 can be manually moved to stop it from blocking the ratchet 22, so that the bidirectional screw 11 can be rotated normally.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A tool for preparing hydrological observation wells, comprising a lifting block (1), characterized in that: The bottom end of the lifting block (1) is provided with a clamping mechanism, the inner side of the clamping mechanism is provided with an adjustment mechanism, the bottom end of the adjustment mechanism is provided with a transmission mechanism, the bottom of the transmission mechanism is provided with a limiting mechanism, and the outer side of the lifting block (1) is provided with a well pipe (9). The clamping mechanism includes a fixed rod (3), a lifting groove (4), a clamping rod (6) and a hinge (7). The bottom end of the lifting block (1) is fixedly installed with a fixed rod (3). Eight hinges (7) are provided on the surface of the fixed rod (3) near the middle. Clamping rods (6) are provided on the outer surface of the fixed rod (3) near the hinges (7).

2. The tool for preparing a hydrological observation well according to claim 1, characterized in that: The outer ends of the clamping rod (6) are provided with anti-slip clamping pads (10). The two ends of the clamping rod (6) are respectively connected to the fixing rod (3) and the anti-slip clamping pads (10) through hinges (7). The anti-slip clamping pads (10) are in contact with the inner wall surface of the well pipe (9).

3. The tool for preparing a hydrological observation well according to claim 2, characterized in that: The adjustment structure includes a lifting groove (4), an adjusting rod (5), a two-way screw (11), and a screw movable sleeve (19). The fixed rod (3) is a hollow tube. The two-way screw (11) is rotatably installed inside the fixed rod (3). The top end of the two-way screw (11) moves through the top end of the lifting block (1) and extends to the outside of the top end of the lifting block (1). The outer surface of the fixed rod (3) is provided with multiple lifting grooves (4). The two-way screw (11) is movably installed with screw movable sleeves (19) near both ends on the outer surface of the outer surface of the screw movable sleeve (19). Four adjusting rods (5) are fixedly installed on the outer surface of the screw movable sleeve (19). The adjusting rods (5) move through the interior of the lifting groove (4) and extend to the outside of the fixed rod (3).

4. The tool for preparing a hydrological observation well according to claim 3, characterized in that: The outer ends of the adjusting rods (5) are rotatably mounted with shafts (20), and the inner surfaces of the clamping rods (6) are provided with adjusting grooves (12). Both ends of the shafts (20) are movably inserted into the adjusting grooves (12).

5. The hydrological observation well preparation tool according to claim 4, characterized in that: The transmission mechanism includes a pinion (13), a large gear (14), and a rack (15). The bottom end of the bidirectional lead screw (11) is fixedly equipped with a pinion (13). The bottom end of the pinion (13) is provided with a base plate (8). The bottom end of the pinion (13) is rotatably connected to the base plate (8). The outer surface of the pinion (13) is meshed with two large gears (14). The outer surface of each large gear (14) is meshed with a rack (15). The racks (15) are slidably installed in the gap between the base plate (8) and the pinion (13).

6. The hydrological observation well preparation tool according to claim 5, characterized in that: The transmission mechanism also includes a connecting frame (16), a roller (17) and a fixed ring (18). The outer end of the rack (15) is fixedly installed with the connecting frame (16). The roller (17) is rotatably installed on the connecting frame (16) near the inner wall of the well pipe (9). The roller (17) is elastically attached to the surface of the well pipe (9). The bottom end of the connecting frame (16) is fixedly installed with the fixed ring (18).

7. The tool for preparing a hydrological observation well according to claim 6, characterized in that: Both sides of the base plate (8) are provided with T-shaped grooves (26), and T-shaped sliders (24) are fixedly installed at the bottom end of the rack (15). The T-shaped sliders (24) are slidably inserted into the interior of the T-shaped grooves (26). Compression springs (25) are movably installed between the T-shaped sliders (24) and the interior of the T-shaped grooves (26). One end of the compression springs (25) is connected to the T-shaped sliders (24), and the other end of the compression springs (25) is connected to the inner wall of the T-shaped grooves (26).

8. The tool for preparing a hydrological observation well according to claim 7, characterized in that: The limiting mechanism includes a mounting ring (21), a ratchet (22), and a pawl (23). The mounting ring (21) is fixedly mounted on the bottom end of the base plate (8). The ratchet (22) is rotatably mounted inside the mounting ring (21). The top end of the ratchet (22) is fixedly connected to the bottom end of the pinion (13). The pawl (23) is hinged to the inner surface of the mounting ring (21). A torsion spring is provided at the hinge position of the pawl (23).

9. A tool for preparing hydrological observation wells according to claim 8, characterized in that: The top of the lifting block (1) is fixedly installed with a lifting rod (2), and the top surface of the lifting rod (2) is provided with a lifting rope.

10. A method for operating a hydrological observation well preparation tool according to any one of claims 1-9, characterized in that: The application method includes the following steps: S1: First, move the device to the vicinity of the hydrological observation well using a crane and hoisting rope, and place the hoisting block (1) inside the well pipe (9). At this time, the double-ended screw (11) protruding from the top of the hoisting block (1) can be rotated to drive the screw movable sleeve (19) to move from the position of the lifting groove (4) towards the center of the well pipe (9), thereby driving the adjusting rod (5) to move inside the well pipe (9). At this time, the adjusting rod (5) will drive the clamping rod (6) to rotate outward through the rotating shaft (20), thereby making the anti-slip clamping pad (10) tightly fit with the inner wall surface of the well pipe (9), and clamping the well pipe (9) by the friction of the anti-slip clamping pad (10). S2: The device is then lifted by a crane and hoisting rope, and the hoisting block (1) clamps the well pipe (9) and puts the well pipe (9) into the hydrological observation well. When the well pipe (9) falls to the bottom of the observation well, the bottom end of the fixing ring (18) will hit the positioning pipe or the top surface of the well pipe (9) that has been placed in advance at the bottom of the observation well. At this time, the fixing ring (18) will be pushed inward, thereby driving the roller (17) and rack (15) to move along the direction of the T-shaped slide (26) through the connecting frame (16). At this time, the surface of the rack (15) will push the large gear (17) to move along the direction of the T-shaped slide (26). 4), thereby causing the large gear (14) to rotate, which in turn drives the small gear (13) to rotate. When the small gear (13) rotates, it will drive the double-acting screw (11) to rotate synchronously, thereby causing the two screw movable sleeves (19) to move to both ends of the well pipe (9) respectively, thereby causing the adjusting rod (5) to drive the clamping rod (6) to rotate inward through the rotating shaft (20). At this time, the anti-slip clamping pad (10) separates from the inner wall of the well pipe (9), thereby releasing the clamping of the well pipe (9). The crane can then raise the device again to clamp and install subsequent well pipes (9). S3: When the rack (15) drives the large gear (14) to rotate, the small gear (13) will drive the ratchet (22) at the bottom of the base plate (8) to rotate at the same time, so that the ratchet (22) is locked in one direction by the pawl (23) to prevent the small gear (13) from rotating due to external force or other action, which would cause the clamping rod (6) to not release the well pipe (9). After the device is removed from the observation well, the pawl (23) can be manually moved to stop it from blocking the ratchet (22), so that the bidirectional screw (11) can be rotated normally.

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