Drilling water level measuring mechanism and water pumping test system

Abstract

The utility model relates to the technical field of hydrological survey, in particular to a drilling water level measuring mechanism and a water pumping test system, by arranging a sleeve, a measuring part and at least two sliding parts, when the drilling water level measuring mechanism is used, the sleeve is sleeved on the periphery of a drilling rod, and a mounting space is formed between the sleeve and the drilling rod; then, the at least two sliding components are distributed in the circumferential direction of the drill rod at intervals, all the sliding components are connected with the inner wall of the sleeve, finally, the measuring component is arranged at the end close to the sleeve, and the measuring component can extend out of the sleeve from the mounting space from one end of the sleeve to detect the water level in the drill hole. Therefore, when the drilling water level measuring mechanism is used, wire harnesses such as cables can penetrate through the installation space, interference of the wire harnesses such as the cables to the drilling water level measuring mechanism is avoided, and use safety is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of hydrological surveying technology, and in particular to a borehole water level measuring mechanism and a pumping test system. Background Technology

[0002] Hydrogeological work frequently utilizes pumping tests to obtain hydrogeological parameters such as permeability coefficients. A pumping test involves using a pump to extract water from a borehole. Simultaneously, the drawdown (S) and flow rate (Q) in the borehole are measured at predetermined intervals. Substituting the drawdown (S) and flow rate (Q) into the standard formula yields the permeability coefficient.

[0003] During pumping tests, the water pump, borehole level measuring mechanism, and cables are typically attached to the drill rod. The drill rod then lowers the water pump and drilling level measuring mechanism to perform pumping and water level measurement. While existing technology can monitor water levels during pumping tests, the limited borehole diameter in actual monitoring can cause entanglement between the drilling level measuring mechanism and the cable, affecting safety. Utility Model Content

[0004] The main purpose of this utility model is to provide a borehole water level measuring mechanism and a pumping test system, which aims to solve the technical problem in the related technology that, while water level monitoring can be achieved during pumping tests, the limited borehole diameter causes entanglement between the borehole water level measuring mechanism and the cable, affecting the safety of use.

[0005] To achieve the above objectives, in a first aspect, this utility model proposes a borehole water level measuring mechanism, the borehole water level measuring mechanism comprising:

[0006] A sleeve is fitted around the outer periphery of the drill rod. The outer diameter of the sleeve is smaller than the diameter of the drill hole. The sleeve is connected to an external drive device via a flexible connector. An installation space is formed between the inner wall of the sleeve and the drill rod.

[0007] At least two sliding components are provided, spaced apart circumferentially along the drill pipe within the mounting space, and each sliding component is connected to the inner wall of the sleeve; and,

[0008] A measuring component is disposed near one end of the sleeve and can extend from one end of the sleeve from the mounting space to the outside of the sleeve to detect the water level in the borehole.

[0009] Optionally, the sliding component includes a telescopic member and a sliding roller. The telescopic member is installed on the inner wall of the sleeve, and the sliding roller is installed on the telescopic end of the telescopic member. The telescopic member can drive the sliding roller to extend to contact the outer periphery of the drill rod, so that the sliding roller slides along the outer periphery of the drill rod.

[0010] Optionally, the sliding component further includes a connecting bracket, with a hinged end and a mounting end at its two ends. The hinged end is hinged to the inner wall of the sleeve, and the mounting end is rotatably connected to the sliding roller. The telescopic member and the connecting bracket are spaced apart along the extension direction of the drill rod. The telescopic member is hinged to the inner wall of the sleeve, and the telescopic end is hinged to the mounting end. The telescopic member can drive the mounting end to rotate around the connecting end, thereby causing the sliding roller to approach and contact the outer periphery of the drill rod.

[0011] Optionally, the outer periphery of the sliding roller is fitted onto an elastic compression ring, and the telescopic member can drive the mounting end to rotate around the connecting end, so as to bring the sliding roller closer to and abut against the outer periphery of the drill pipe.

[0012] Optionally, the measuring component includes:

[0013] A drive assembly is disposed within the installation space and is located near the bottom end of the sleeve;

[0014] A guide assembly, connected to the drive assembly, and at least a portion of the guide assembly extending from the bottom end of the sleeve to the mounting space beyond the sleeve, to suspend the drive assembly on the sleeve; and,

[0015] A measuring component, wherein the measuring component is disposed outside the sleeve and is connected to the guide component;

[0016] The drive assembly can rotate around the drill rod along the inner wall of the sleeve and drive the guide assembly and the measuring assembly to rotate around the sleeve, so that the measuring assembly can measure the water level in the borehole.

[0017] Optionally, the drive assembly includes a gear ring, a drive gear, and a drive member. The gear ring is sleeved on the outer periphery of the drill rod and mounted on the inner wall of the sleeve. A retaining ring is formed between the gear ring and the inner wall of the sleeve, surrounding the outer periphery of the drill rod. The drive gear meshes with the gear ring. The output end of the drive member is interference-fitted with the drive gear, and the side wall of the drive member is engaged with the retaining ring. The drive member can slide around the retaining ring when driving the drive gear to rotate around the gear ring.

[0018] Optionally, the guide assembly includes a first connecting arm, a first sliding wheel, a second connecting arm, and a second sliding wheel. One end of the first connecting arm is connected to the drive member. The first sliding wheel is mounted on the end of the first connecting arm away from the drive member and can slide within the retaining ring. The two ends of the second connecting arm are respectively connected to the output end of the drive member and the second sliding wheel. The end of the second connecting arm connected to the second sliding wheel extends from the bottom end of the sleeve from the mounting space to the outer wall of the sleeve. The outer wall of the sleeve is provided with a slip ring arranged circumferentially around the drill pipe, and the second sliding wheel slides in cooperation with the slip ring.

[0019] Optionally, the measuring component includes a telescopic joint and a visual measuring element, with the two ends of the telescopic joint connected to the second connecting arm and the visual measuring element, respectively.

[0020] Optionally, the inner and outer walls of the sleeve are provided with water level scale lines that are spaced apart along their extension direction.

[0021] Based on the same technical concept, in a second aspect, this utility model proposes a pumping test system, including a drill rod, a pumping device, and the borehole water level measuring mechanism described in the first aspect. The pumping device is installed at the bottom end of the drill rod, and the pumping device can perform a pumping test on the borehole. The water level measuring mechanism is used to measure the water level in the borehole.

[0022] This utility model's technical solution involves setting up a sleeve, a measuring component, and at least two sliding components. In use, the sleeve is fitted around the outer circumference of the drill rod, forming an installation space between the sleeve and the drill rod. At least two sliding components are then spaced apart along the circumference of the drill rod, with each sliding component connected to the inner wall of the sleeve. Finally, the measuring component is positioned near one end of the sleeve, extending from one end of the sleeve through the installation space to the outside of the sleeve to detect the water level inside the borehole. This allows cables and other wiring harnesses to pass through the installation space during use, avoiding interference with the borehole water level measuring mechanism and ensuring safety. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the borehole water level measuring mechanism as an example of this utility model from one perspective;

[0025] Figure 2 Another structural schematic diagram of the borehole water level measuring mechanism as an example of this utility model;

[0026] Figure 3 This is a side view of the borehole water level measuring mechanism as an example of the present invention.

[0027] Figure 4 This is a schematic diagram of the installation state of the borehole water level measuring mechanism as an example of this utility model;

[0028] Figure 5 This is a schematic diagram of the pumping test system as an example of this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] label name label name 100 sleeve 110 Installation space 200 Sliding components 120 Flexible connectors 300 Measuring components 130 External drive device 210 expansion joint 311 Gear ring 220 sliding roller 312 Drive gear 230 Connecting bracket 313 Drive components 231 Hinged end 321 First connecting arm 232 Installation end 322 First pulley 240 Elastic compression ring 323 Second connecting arm 310 Driver components 324 Second pulley 320 Guide components 331 Telescopic joint 330 Measurement components 332 Visual measurement components 140 Water level markings 10 drill pipe 20 Pumping equipment 30 Borehole water level measurement mechanism 314 Card slot 325 slip ring

[0031] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0036] The inventive concept of this utility model will be further explained below with reference to some specific embodiments.

[0037] This utility model proposes a borehole water level measurement mechanism and a pumping test system.

[0038] like Figures 1 to 5 As shown, an embodiment of the borehole water level measuring mechanism 30 and the pumping test system of this utility model is presented.

[0039] Please see Figures 1 to 4 This type of borehole water level measuring mechanism 30 includes a sleeve 100, a measuring component 300, and at least two sliding components 200. The sleeve 100 is sleeved on the outer periphery of the drill rod 10, and the outer diameter of the sleeve 100 is smaller than the borehole diameter. The sleeve 100 is connected to an external drive device 130 through a flexible connector 120. An installation space 110 is formed between the inner wall of the sleeve 100 and the drill rod 10. At least two sliding components 200 are distributed at intervals along the circumference of the drill rod 10 in the installation space 110, and each sliding component 200 is connected to the inner wall of the sleeve 100. The measuring component 300 is set near one end of the sleeve 100, and the measuring component 300 can extend from one end of the sleeve 100 from the installation space 110 to the outside of the sleeve 100 to detect the water level in the borehole.

[0040] In this embodiment, by setting up a sleeve 100, a measuring component 300, and at least two sliding components 200, in use, the sleeve 100 is fitted onto the outer periphery of the drill rod 10, forming an installation space 110 between the sleeve 100 and the drill rod 10. At least two sliding components 200 are then spaced apart circumferentially along the drill rod 10, with each sliding component connected to the inner wall of the sleeve 100. Finally, the measuring component 300 is positioned near one end of the sleeve 100, extending from one end of the sleeve 100 through the installation space 110 to the outside of the sleeve 100 to detect the water level in the borehole. This allows cables and other wire harnesses to pass through the installation space 110 during use, avoiding interference from cables and other wire harnesses to the borehole water level measuring mechanism 30 and ensuring safety during use.

[0041] It should be specifically and explicitly stated that, in this embodiment, the example measuring component 300 may be, but is not limited to, any device or apparatus in the prior art capable of performing water level measurement. For example, the example measuring component 300 in this embodiment may be a device composed of a CCD vision camera capable of performing water level measurement. It should also be clarified that, in this embodiment, the example flexible connector 120 may be, but is not limited to, a steel rope, nylon rope, etc., and the example external drive device 130 may be, but is not limited to, a winch, etc.

[0042] It should be further emphasized that, in practical use, since an installation space 110 is formed between the sleeve 100 and the drill rod 10, and at least two sliding parts 200 are distributed circumferentially along the drill rod 10, a gap is formed between any two adjacent sliding parts 200 within the installation space 110. At the same time, the measuring part 300 can extend from one end of the sleeve 100 from the installation space 110 to the outside of the sleeve 100. In practical use, cables and other wire harnesses can pass through the gap between any two adjacent sliding parts 200, thereby enabling the cables and other wire harnesses and the measuring part 300 to be located on the inside and outside of the sleeve 100, respectively. This achieves the function of separating the cables and other wire harnesses from the measuring part 300 using the sleeve 100, thereby preventing the cables and other wire harnesses from tangling with the measuring part 300.

[0043] In some specific embodiments, the sliding component 200 includes a telescopic member 210 and a sliding roller 220. The telescopic member 210 is installed on the inner wall of the sleeve 100, and the sliding roller 220 is installed on the telescopic end of the telescopic member 210. The telescopic member 210 can drive the sliding roller 220 to extend to contact the outer periphery of the drill rod 10, so that the sliding roller 220 slides along the outer periphery of the drill rod 10.

[0044] In this embodiment, by setting the telescopic member 210 and the sliding roller 220, during use, the telescopic member 210 can drive the sliding roller 220 to extend and contact the outer periphery of the drill rod 10, so that the sliding roller 220 slides along the outer periphery of the drill rod 10. This allows the sleeve 100 and the measuring component 300 mounted on the sleeve 100 to slide along the drill rod 10 under the combined action of the telescopic member 210 and the sliding roller 220, thereby changing the position of the measuring component 300 in the borehole. This ensures that the measuring component 300 can follow the water level in the borehole to detect the water level at different positions.

[0045] It should be specifically and clearly stated that the telescopic member 210 exemplified in this embodiment may be, but is not limited to, a hydraulic rod driven by a hydraulic pump, an electric actuator driven by an electric cylinder, or a cylinder driven by an air compressor, etc., as is done in the prior art.

[0046] In some exemplary embodiments, the sliding component further includes a connecting bracket 230, with a hinged end 231 and a mounting end 232 at its two ends. The hinged end 231 is hinged to the inner wall of the sleeve 100, and the mounting end 232 is rotatably connected to the sliding roller 220. The telescopic member 210 and the connecting bracket 230 are spaced apart along the extension direction of the drill rod 10. The telescopic member 210 is hinged to the inner wall of the sleeve 100, and the telescopic end is hinged to the mounting end 232. The telescopic member 210 can drive the mounting end 232 to rotate around the connecting end, so as to drive the sliding roller 220 to approach and contact the outer periphery of the drill rod 10.

[0047] In this embodiment, by setting a connecting bracket 230, the two ends of the connecting bracket 230 are respectively a hinge end 231 and a mounting end 232. The hinge end 231 is hinged to the inner wall of the sleeve 100, and the mounting end 232 is rotatably connected to the sliding roller 220. Furthermore, the telescopic member 210 and the connecting bracket 230 are spaced apart along the extension direction of the drill rod 10, so that the connecting bracket 230 and the telescopic member 210 can form a triangular structure when the present invention is used, thereby improving the stability of the sliding roller 220 when sliding along the drill rod 10.

[0048] In some preferred embodiments, the outer periphery of the sliding roller 220 is fitted onto the elastic compression ring 240, and the telescopic member 210 can drive the mounting end 232 to rotate around the connecting end, so as to drive the sliding roller 220 to approach and contact the outer periphery of the drill rod 10.

[0049] In this embodiment, by providing an elastic compression ring 240 on the outer periphery of the sliding roller 220, the present invention can control the compression force between the elastic compression ring 240 and the drill rod 10 by controlling the extension distance of the telescopic member 210, thereby controlling the speed at which the sliding roller 220 slides along the drill rod 10 and ensuring safety.

[0050] It should be specifically and clearly stated that the elastic compression ring 240 exemplified in this embodiment is preferably made of elastic rubber with friction and anti-slip effects.

[0051] In some optional embodiments, the measuring component 300 includes a drive assembly 310, a guide assembly 320, and a measuring component 330. The drive assembly 310 is disposed within the mounting space 110 and is located near the bottom end of the sleeve 100. The guide assembly 320 is connected to the drive assembly 310, and at least a portion of the guide assembly 320 can extend from the bottom end of the sleeve 100 to the outside of the mounting space 110 to suspend the drive assembly 310 on the sleeve 100. The measuring component 330 is disposed outside the sleeve 100 and is connected to the guide assembly 320. The drive assembly 310 can rotate along the inner wall of the sleeve 100 around the drill rod 10 and drive the guide assembly 320 and the measuring component 330 to rotate around the sleeve 100, so that the measuring component 330 measures the water level in the borehole.

[0052] In this embodiment, by setting up a driving component 310, a guiding component 320, and a measuring component 330, the driving component 310 can rotate around the drill rod 10 along the inner wall of the sleeve 100 and drive the guiding component 320 and the measuring component 330 to rotate around the sleeve 100, so that the measuring component 330 can measure the water level in the borehole. This allows the present invention to control the measuring position of the measuring component 330 in the borehole by using the driving component 310 and the guiding component 320, thereby improving the flexibility of the measuring component 330 in measuring the water level in the borehole.

[0053] In some preferred embodiments, the drive assembly 310 includes a gear ring 311, a drive gear 312, and a drive member 313. The gear ring 311 is sleeved on the outer periphery of the drill rod 10 and is mounted on the inner wall of the sleeve 100. A retaining ring is formed between the gear ring 311 and the inner wall of the sleeve 100, which is arranged around the outer periphery of the drill rod 10. The drive gear 312 meshes with the gear ring 311. The output end of the drive member 313 is interference-fitted with the drive gear 312, and the side wall of the drive member 313 is engaged with the retaining ring. The drive member 313 can slide around the retaining ring when the drive gear 312 rotates around the gear ring 311.

[0054] In this embodiment, by setting a gear ring 311, a drive gear 312, and a drive member 313, the drive member 313 can be engaged along the retaining ring provided between the gear ring 311 and the inner wall of the sleeve 100. Furthermore, when the drive gear 312 slides along the gear ring 311, the drive member 313 can be driven to slide along the retaining ring. Thus, this utility model realizes the function of suspending the drive member 313 and the drive gear 312 within the installation space 110, ensuring the simplification of the overall structure.

[0055] It should be specifically and clearly stated that the drive in this embodiment may be, but is not limited to, a drive motor or a stepper motor driven by a battery.

[0056] In some preferred embodiments, the guide assembly 320 includes a first connecting arm 321, a first sliding wheel 322, a second connecting arm 323, and a second sliding wheel 324. One end of the first connecting arm 321 is connected to the drive member 313. The first sliding wheel 322 is mounted on the end of the first connecting arm 321 away from the drive member 313 and can slide within the retaining ring. The two ends of the second connecting arm 323 are respectively connected to the output end of the drive member 313 and the second sliding wheel 324. The end of the second connecting arm 323 connected to the second sliding wheel 324 extends from the bottom end of the sleeve 100 from the mounting space 110 to the outer wall of the sleeve 100. The outer wall of the sleeve 100 is provided with a slip ring 325 arranged circumferentially around the drill rod 10. The second sliding wheel 324 slides in cooperation with the slip ring 325.

[0057] In this embodiment, by setting a first connecting arm 321, a first sliding wheel 322, a second connecting arm 323, and a second sliding wheel 324, and by making the first sliding wheel 322 mounted on the first connecting arm 321 slide along the groove ring when the driving member 313 drives the driving gear 312 to rotate around the gear ring 311, and at the same time making the second sliding wheel 324 mounted on the second connecting arm 323 and set outside the sleeve 100 slide along the slip ring 325 set on the outer wall of the sleeve 100, the present invention can slide synchronously around the sleeve 100, ensuring motion accuracy. Furthermore, since the inner and outer walls of the sleeve 100 are provided with a groove ring for sliding the first sliding wheel 322 and a slip ring 325 for sliding the second sliding wheel 324, the present invention can utilize the cooperation between the groove ring and the first sliding wheel 322 and the cooperation between the second sliding wheel 324 and the slip ring 325 to make the driving component 313 and the driving gear 312 more securely suspended at the bottom of the sleeve 100, thereby improving the safety of use.

[0058] It should be specifically and clearly stated that, in this embodiment, the example first groove ring can also be an annular slide rail circumferentially arranged on the inner wall of the sleeve 100 around the drill rod 10, and the first sliding wheel 322 corresponds to a slider that slides in cooperation with the annular slide rail; the example slip ring 325 can also be an annular slide rail circumferentially arranged on the outer wall of the sleeve 100 around the drill rod 10, and the second sliding wheel 324 corresponds to a slider that slides in cooperation with the annular slide rail. This arrangement ensures the connection stability between the drive member 313 and the drive gear 312 and the sleeve 100 during use.

[0059] In some preferred embodiments, the measuring component 330 includes a telescopic joint 331 and a visual measuring element 332, with the two ends of the telescopic joint 331 connected to the second connecting arm 323 and the visual measuring element 332, respectively.

[0060] In this embodiment, by providing a telescopic joint 331 and a visual measuring element 332, the present invention can change the position of the visual measuring element 332 mounted thereon using the telescopic joint 331, thereby improving the flexibility of the visual measuring element 332 during use. Simultaneously, due to the telescopic joint 331, the present invention can also drive the bottom end of the visual measuring element to move from outside the sleeve 100 to inside the sleeve 100 during use, thereby detecting the water level inside the sleeve 100.

[0061] It should be specifically and clearly stated that, in this embodiment, the example visual measurement device 332 can be, but is not limited to, a CCD visual camera or similar device capable of acquiring visual images using existing technology. Of course, it is particularly important to note that the visual measurement device 332 should be waterproof. The example telescopic joint 331 can be a flexible robotic arm or a multi-joint robotic arm.

[0062] In some specific embodiments, the inner wall and outer wall of the sleeve 100 are provided with water level scale lines 140 that are spaced apart along their extension direction.

[0063] In this embodiment, by setting water level scale lines 140 on both the inner and outer walls of the sleeve 100, the present invention can simultaneously detect the water level outside and inside the sleeve 100 during use, thereby improving the accuracy of detecting the water level inside the borehole.

[0064] To facilitate a clearer understanding of this utility model, in specific use, the telescopic joint 331 can be used to drive the vision detection component to collect visual images of the water level scale line 140 set on the outer wall or inner wall of the sleeve 100. External operators can then read the water level in the borehole based on the visual images collected by the vision measurement component 332.

[0065] Based on the same technical concept, in a second aspect, this utility model proposes a pumping test system, including a drill rod 10, a pumping device 20, and a borehole water level measuring mechanism 30. The pumping device 20 is installed at the bottom end of the drill rod 10 and can perform a pumping test on the borehole. The water level measuring mechanism is used to measure the water level in the borehole.

[0066] In this embodiment, by setting up a drill rod 10, a pumping device 20, and a borehole water level measuring mechanism 30, the present invention can use the drill rod 10 to send both the pumping device 20 and the borehole water level measuring mechanism 30 into the borehole during use, so as to realize the function of pumping test and water level measurement test in the borehole.

[0067] It should be specifically and clearly stated that, in this embodiment, the drill rod 10 is of the same structure as the drill rod 10 in the previous embodiment. In actual use, the pumping test system exemplified in this embodiment should also include the external drive device 130 exemplified in the previous embodiment, which should be installed on the ground or surface at the location of the borehole. The external drive device 130 can be used to change the position of the sleeve 100 inside the borehole.

[0068] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. All equivalent structural transformations made based on the contents of this utility model specification and drawings under the utility model concept, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A borehole water level measuring mechanism characterized by, The application relates to a water level measuring device for a drill hole. The device comprises a sleeve, at least two sliding components and a measuring component. The sleeve is sleeved on the outer periphery of a drill rod, the outer diameter of the sleeve is smaller than the hole diameter of the drill hole, the sleeve is connected with an external driving device through a flexible connecting piece, and an installation space is formed between the inner wall of the sleeve and the drill rod. The at least two sliding components are distributed in the installation space along the circumference of the drill rod and are connected with the inner wall of the sleeve.

2. The drillhole water level measuring mechanism according to claim 1, characterized in that The measuring component is arranged near one end of the sleeve and can extend from the one end of the sleeve to the outside of the sleeve from the installation space to detect the water level in the drill hole.

3. A borehole water level measuring mechanism according to claim 2, characterised in that, The sliding component comprises a telescopic piece and a sliding roller.

4. The drillhole water level measuring device according to claim 3, characterized in that The telescopic piece is arranged on the inner wall of the sleeve, the sliding roller is arranged on the telescopic end of the telescopic piece, and the telescopic piece can drive the sliding roller to extend to the outer periphery of the drill rod to make the sliding roller slide along the outer periphery of the drill rod.

5. The drillhole water level measuring mechanism according to any one of claims 1 to 4, characterized in that, The sliding component further comprises a connecting bracket. The two ends of the connecting bracket are respectively a hinged end and a mounting end. The hinged end is hinged with the inner wall of the sleeve, the mounting end is rotatably connected with the sliding roller, the telescopic piece and the connecting bracket are distributed along the extension direction of the drill rod, the telescopic piece is hinged with the inner wall of the sleeve, and the telescopic end is hinged with the mounting end. The telescopic piece can drive the mounting end to rotate around the hinged end to drive the sliding roller to approach and contact the outer periphery of the drill rod.

6. A borehole water level measuring mechanism according to claim 5, wherein The outer periphery of the sliding roller is sleeved with an elastic extrusion ring. The measuring component comprises a driving assembly, a guide assembly and a measuring assembly. The driving assembly is arranged in the installation space and is arranged near the bottom end of the sleeve. The guide assembly is connected with the driving assembly, and at least part of the guide assembly can extend from the bottom end of the sleeve to the outside of the sleeve from the installation space to hang the driving assembly in the sleeve. The measuring assembly is arranged outside the sleeve and is connected with the guide assembly. The driving assembly can rotate around the drill rod along the inner wall of the sleeve and drive the guide assembly and the measuring assembly to rotate around the sleeve, so that the measuring assembly measures the water level in the drill hole. The driving assembly comprises a gear ring, a driving gear and a driving piece. The gear ring is sleeved on the outer periphery of the drill rod and is arranged on the inner wall of the sleeve. A clamping groove ring is arranged around the outer periphery of the drill rod between the gear ring and the inner wall of the sleeve. The driving gear is engaged with the gear ring. The output end of the driving piece is in interference fit with the driving gear, and the side wall of the driving piece is clamped with the clamping groove ring. The driving piece can slide around the clamping groove ring when driving the driving gear to rotate around the gear ring.

7. A borehole water level measuring device according to claim 6, characterised in that, The guiding assembly comprises a first connecting arm, a first sliding wheel, a second connecting arm and a second sliding wheel, one end of the first connecting arm is connected with the driving member, the first sliding wheel is installed at the end of the first connecting arm away from the driving member and can slide in the clamping groove ring, two ends of the second connecting arm are connected with the output end of the driving member and the second sliding wheel respectively, one end of the second connecting arm connected with the second sliding wheel extends from the mounting space to the outer wall of the sleeve at the bottom end of the sleeve, the outer wall of the sleeve is provided with a slip ring arranged around the circumference of the drill pipe, and the second sliding wheel is in sliding fit with the slip ring.

8. A borehole water level measuring mechanism according to claim 7, characterised in that, The measuring assembly comprises a telescopic joint and a visual measuring member, two ends of the telescopic joint are connected with the second connecting arm and the visual measuring member respectively.

9. The drillhole water level measuring mechanism according to any one of claims 1 to 4, characterized in that, The inner wall and the outer wall of the sleeve are both provided with water level scale lines distributed at intervals along the extension direction thereof.

10. A pumping test system, characterized by, The drilling water level measuring mechanism comprises a drill pipe, a water pumping device and the drilling water level measuring mechanism according to any one of claims 1 to 9, the water pumping device is installed at the bottom end of the drill pipe, the water pumping device can perform water pumping test on the drill hole, and the water level measuring mechanism is used for measuring the water level in the drill hole.

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