Equipment and method for detecting water level in rock stratum drilling hole

Abstract

The invention relates to the technical field of drilling fluid level detection, and discloses a rock stratum drilling hole water level detection device which comprises a device body, the bottom of the device body is connected with a water level detection assembly through a hanging assembly, and the water level detection assembly comprises a machine body and a guide wheel set located on the periphery of the machine body. The guide wheel set is used for guiding the machine body when the machine body enters a well drilling hole to move axially. The guide wheel sets are arranged on the periphery of the machine body in an array mode and connected with the machine body through the telescopic mechanism, and the telescopic mechanism comprises a displacement plate, a connecting rod, an arc-shaped sliding rail and a supporting frame. Therefore, the guide wheel set can adapt to well drilling holes of different sizes, the application range of the guide wheel set is wider, practicability is better, and meanwhile it is guaranteed that data are more accurate when the guide wheel set measures the water level.

Description

Technical Field

[0001] The invention relates to the technical field of drilling fluid level detection, and specifically discloses a device and a method for detecting the water level in a rock formation drilling hole. Background Art

[0002] In the fields of geotechnical engineering and geological exploration, accurate water level measurement is crucial for assessing groundwater resources, monitoring geological stability, and guiding engineering construction. However, traditional water level measurement technology has many limitations, especially in terms of the stability and accuracy of the measuring equipment.

[0003] In the existing technology, the operation of water level measurement equipment in the borehole is often limited by the irregularity of the well wall, which makes the equipment unable to maintain a horizontal state, thus affecting the accuracy of the measurement results. For example, some devices rely on gravity sensing or simple mechanical balance to maintain the level, but in actual operation, due to the unevenness of the borehole wall, these devices are often difficult to achieve true level, resulting in deviations in the measurement data. In addition, traditional water level measurement methods, such as electrical depth sounding, mercury pressure gauge method, water-filled tube method, and open water meter method, usually have the following technical defects: First, most of these methods rely on manual observation and operation, which is not only inefficient, but also easily affected by human errors. Secondly, due to the influence of groundwater flow and buoyancy, the traditional rope and float system is difficult to ensure the stability and accuracy of the measurement, resulting in measurement errors. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for detecting water level in a rock formation drilling hole, so as to solve one of the above-mentioned technical problems existing in the prior art.

[0005] Specifically, the present invention is achieved through the following technical solutions:

[0006] A water level detection device for a rock formation wellbore comprises a device body, the bottom of the device body is connected to a water level detection assembly via a suspension assembly, the water level detection assembly comprises a body and a guide wheel assembly located around the body, and the guide wheel assembly is used to guide the body when the body enters the wellbore for axial movement;

[0007] The guide wheel array is arranged around the body and is connected to the body through a telescopic mechanism. The telescopic mechanism comprises a displacement plate, a connecting rod, an arc slide rail and a support frame. The displacement plate is located on the upper part of the body, and a sliding rod with a bottom end connected to the body is penetrated at the middle position of the displacement plate. The displacement plate is slidably connected to the sliding rod, and the connecting rod is hinged at one side of the displacement plate. The arc slide rail is attached to the side of the body, and the curvature fits the outer contour of the body. The support frame is formed into a V-shaped structure by two connecting rods hinged to each other. The free ends of the two connecting rods are hinged to sliding blocks symmetrically arranged at both ends of the arc slide rail, and the hinged ends of the two connecting rods are connected to the guide wheel group through a connecting seat. The upper part of the connecting seat is also hinged to an end of the connecting rod away from the displacement plate. A cylinder is also provided around the bottom of the displacement plate and between the body, and the displacement plate is pushed by the cylinder to perform axial movement on the slide rod.

[0008] Preferably, the guide wheel assembly comprises a mounting plate connected to the connecting seat and a driving roller located on a side of the mounting plate, and the driving roller is connected to the mounting plate via a buffer mechanism.

[0009] Specifically, the suspension assembly includes a winder, a wire rope and a connector. The winder is arranged on the device body and connected to the wire rope through a winding roller. The surface of the wire rope is provided with a scale, and its bottom end is connected to the connector installed on the top of the sliding rod.

[0010] Preferably, a liquid level detection head is also provided at the bottom of the machine body, a horizontal adjustment mechanism is provided between the liquid level detection head and the machine body, a cavity is provided inside the liquid level detection head, a through hole penetrating the liquid level detection head is opened at the upper part of the cavity, a liquid sensor is provided inside the cavity, and the liquid sensor is signal-connected with the control unit of the winding machine. When the liquid sensor contacts the liquid, a corresponding electrical signal is generated and transmitted to the control unit of the winding machine, so that the control unit sends a stop command to the winding machine.

[0011] As a further technical solution, a plurality of distance measuring units are provided between the liquid level detection head and the machine body, and the distance measuring units include a laser distance measuring sensor, a detection buoy and a central control module. The laser distance measuring sensor is embedded in the bottom of the machine body and flush with it. The detection buoy is installed on the top of the liquid level detection head and corresponds one-to-one with the laser distance measuring unit. The central control module is integrated on the laser distance measuring sensor and connected with the liquid sensor signal. When the liquid sensor contacts the liquid and generates a corresponding electrical signal, it is sent to the central control module, so that the central control module sends a start instruction to the laser distance measuring sensor.

[0012] As a further preference, the horizontal adjustment mechanism includes a hemispherical connecting seat and an adjusting rod located around the hemispherical connecting seat, the hemispherical connecting seat includes a matching fixed part and a movable part, the top of the fixed part is connected to the machine body, the movable part is wrapped around the bottom of the fixed part and is movably adapted to the fixed part, and the bottom of the movable part is connected to the liquid level detection head, the adjusting rod is arranged in a ring array, and the top end of the adjusting rod is hinged to the bottom of the machine body, and the bottom end is hinged to the outside of the movable part.

[0013] As a further preferred technical solution, a falling object collection component is also provided at the lower part of the guide wheel group, and the falling object collection component includes a telescopic frame and a net bag. One end of the telescopic frame is connected to the mounting plate, and the other end is connected to the machine body. The net bag is arranged on the telescopic frame, and when the mounting plate is telescoped with the telescopic mechanism, the telescopic frame is driven to telescope synchronously.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0015] 1. The present invention provides a guide wheel group and a telescopic mechanism, so that when the operator is testing the water level in the wellbore, when the machine body is placed into the wellbore, the telescopic mechanism can perform a telescopic action to push the guide wheel group to be close to the inner wall of the wellbore, so that the guide wheel group can adapt to wellbores of different sizes, thereby making it more applicable and more practical. The main purpose of the guide wheel group is to guide the machine body to slide down along the inner wall of the wellbore when the machine body enters the wellbore and moves down along the wellbore, thereby guiding the machine body and ensuring that it always moves in a horizontal state when entering the wellbore. That is, the design of the guide wheel group The design allows the machine body to move smoothly in any direction on the inner wall of the borehole while keeping the machine body in a horizontal state, so that the data is more accurate when measuring the water level. The telescopic mechanism includes a displacement plate, a connecting rod, an arc-shaped slide rail and a support frame. Through its ingenious mechanical structure design, the displacement plate can simultaneously adjust the guide wheel groups around the machine body when moving axially, thereby ensuring that the guide wheel groups move synchronously when they are extended and retracted, and further ensuring that the machine body is still in a stable and balanced state when the guide wheel groups are adjusted, thereby greatly improving the adaptability and stability of the equipment and ensuring that it can perform accurate water level measurements under different well wall conditions.

[0016] 2. The guide wheel assembly of the present invention comprises a mounting plate and a driving roller, and a buffer mechanism is provided between the driving roller and the mounting plate. Therefore, through the setting of the buffer mechanism, when the driving roller rolls on the inner wall of the wellbore, a certain radial activity gap is allowed for the driving roller. Therefore, when the driving roller encounters unevenness on the inner wall of the wellbore, it can be adjusted to ensure that the machine body moves more smoothly on the inner wall of the wellbore. At the same time, it provides buffering when encountering irregularities or turns on the wellbore wall, reduces impact, protects the equipment from damage, enables the equipment to adapt to different wellbore conditions, maintains stable walking, and improves its measurement accuracy;

[0017] 3. The present invention ingeniously arranges a distance measuring unit and a level adjustment head between the liquid level detection head and the machine body. Through the cooperation between the two, the liquid level detection head can be accurately adjusted horizontally so that when entering the liquid, it can maintain a horizontal state parallel to the machine body, thereby ensuring that the water level height data can be accurately measured, thereby further improving the measurement accuracy of the equipment;

[0018] 4. The present invention further ingeniously arranges a falling object collection component at the bottom of the guide wheel group, and the falling object collection component includes a telescopic frame and a net bag, and one end of the telescopic frame is connected to the mounting plate, and the other end is connected to the machine body, and the net bag is arranged on the telescopic frame, so that when the mounting plate is telescoped with the telescopic mechanism, the telescopic frame can be synchronously telescoped, so that the rock protrusions that fall due to the collision of the driving roller can be collected in time, so that when the machine body moves along the inner wall of the borehole, the rock protrusions and other falling objects that fall are collected to prevent them from falling into the borehole and causing fluctuations in the water surface, thereby reducing interference with water level measurement and improving the accuracy of water level measurement results of the equipment. At the same time, it avoids the potential damage to the equipment caused by falling objects such as rocks and soil falling directly into the water, reduces the impact on the groundwater environment, and enhances the safety and adaptability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 For the present invention Figure 1 A partial enlarged structural diagram of the A is intended to show the structure of the guide wheel group;

[0022] Figure 3 It is a structural schematic diagram of the water level detection assembly of the present invention;

[0023] Figure 4 For the present invention Figure 1A top-down structural diagram is intended to show the superstructure of the fuselage;

[0024] Figure 5 For the present invention Figure 1 The bottom-up structural diagram is intended to show the bottom structure of the fuselage;

[0025] Figure 6 Schematic diagram of the structure of the detection component in Example 2 of the present invention.

[0026] The reference numerals represent: 1. device body; 2. suspension assembly; 20. winding machine; 21. wire cable; 3. water level detection assembly; 30. machine body; 31. guide wheel group; 310. mounting plate; 311. driving roller; 3120. buffer plate; 3121. buffer guide rod; 3122. buffer spring; 320. displacement plate; 321. connecting rod; 322. arc slide rail; 323. support frame; 324. slide rod; 325. cylinder; 4. liquid level detection head; 40. cavity; 41. liquid sensor; 5. horizontal adjustment mechanism; 50. hemispherical connector; 500. fixed part; 501. movable part; 51. adjusting rod; 60. laser ranging sensor; 61. detection buoy; 7. falling object collection assembly; 70. telescopic frame; 71. net bag. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and drawings. The schematic implementation modes and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention. It should be noted that the present invention is already in the actual development and use stage.

[0028] Example:

[0029] See also Figures 1 to 5 As shown, this embodiment discloses a water level detection device for a rock formation wellbore, comprising a device body 1, the bottom of the device body 1 is connected to a water level detection component 3 through a suspension component 2, the water level detection component 3 comprises a body 30 and a guide wheel group 31 located around the body 30, and the guide wheel group 31 is used to guide the body 30 when the body 30 enters the wellbore for axial movement;

[0030] The guide wheel group 31 is arranged in an array around the machine body 30 and is connected to the machine body 30 through a telescopic mechanism. The telescopic mechanism includes a displacement plate 320, a connecting rod 321, an arc-shaped slide rail 322 and a support frame 323. The displacement plate 320 is located on the upper part of the machine body 30, and a slide rod 324 whose bottom end is connected to the machine body 30 is penetrated at the middle position of the displacement plate 320. The displacement plate 320 is slidably connected to the slide rod 324, and the connecting rod 321 is hinged at one side of the displacement plate 320. The arc-shaped slide rail 322 is attached to the side of the machine body 30, and the curvature is the same as that of the machine body. The outer contour of the body 30 is fitted, and the support frame 323 is formed into a V-shaped structure by two connecting rods hinged to each other. The free ends of the two connecting rods are hinged to the sliders symmetrically arranged at both ends of the arc-shaped slide rail 322, and the hinged ends of the two connecting rods are connected to the guide wheel group 31 through a connecting seat, and the upper part of the connecting seat is also hinged to the end of the connecting rod 321 away from the displacement plate 320. A cylinder 325 is also provided around the bottom of the displacement plate 320 and between the body 30, and the displacement plate 320 is pushed by the cylinder 325 to perform axial movement on the slide rod 324.

[0031] It should be noted that the core of the water level detection device in the rock formation borehole disclosed in the above embodiment is to propose a mechanical structure that can adapt to the complex environment in the borehole and perform accurate water level measurement. The device is composed of a device body 1 and a water level detection component 3, wherein the water level detection component 3 includes a body 30 and a guide wheel group 31. The design of the guide wheel group 31 enables the body 30 to be effectively guided when axially moving in the borehole, thereby ensuring the stability and guidance of the device in the hole. Since the guide wheel group 31 is arranged in an array around the body 30 and connected to the body 30 through a telescopic mechanism, it can adapt to boreholes of different diameters.

[0032] The telescopic mechanism is composed of a displacement plate 320, a connecting rod 321, an arc-shaped slide rail 322 and a support frame 323. The displacement plate 320 is located on the upper part of the machine body 30, and a slide bar 324 connected to the machine body 30 is provided in the middle. The displacement plate 320 and the slide bar 324 are slidably connected to allow the displacement plate 320 to move axially along the slide bar 324. The connecting rod 321 is hinged on one side of the displacement plate 320. The arc-shaped slide rail 322 is attached to the side of the machine body 30, and the curvature fits the outer contour of the machine body 30. The support frame 323 is composed of Two mutually hinged connecting rods form a V-shaped structure, the free ends of the connecting rods are hinged to the sliders at both ends of the slide rails, and the upper part of the connecting seat is hinged to the other end of the connecting rod 321. Through this design, when it is telescopically adjusted, the cylinder 325 pushes the displacement plate 320 to move axially along the slide rod 324. This action is transmitted to the support frame 323 through the connecting rod 321, causing the V-shaped structure of the support frame 323 to move relative to each other, thereby driving the slider to slide along the arc-shaped slide rail 322, thereby realizing the telescopic movement of the guide wheel group 31. During this process, the guide wheel group 31 is connected to the support frame 323 through the connecting seat, so the guide wheel group 31 can be telescopically adjusted synchronously to adapt to boreholes of different sizes, and its movement process is continuous and coordinated, thereby ensuring the smoothness and accuracy of the telescopic action, so that the guide wheel group 31 can be telescopically adjusted as the diameter of the borehole changes, maintaining contact with the well wall, ensuring the stability of the body 30 when moving in the hole, and also enabling the entire water level detection assembly 3 to move flexibly in the borehole and maintain contact with the well wall, ensuring the stability and accuracy of the measurement process.

[0033] Based on the above embodiments, it should be noted that Figure 2 As shown, the guide wheel group 31 includes a mounting plate 310 connected to the connecting seat and a driving roller 311 located on the side of the mounting plate 310, and the driving roller 311 is connected to the mounting plate 310 through a buffer mechanism.

[0034] By setting the buffer mechanism, the driving roller 311 can be allowed to have a certain radial activity clearance when rolling on the inner wall of the borehole. Therefore, when the driving roller 311 encounters the uneven inner wall of the borehole, it can be adjusted to ensure that the body 30 moves more smoothly on the inner wall of the borehole. At the same time, it provides buffering when encountering irregularities or turns in the borehole wall, reduces impact, protects the equipment from damage, and enables the equipment to adapt to different borehole wall conditions, maintain stable movement, and improve its measurement accuracy.

[0035] For buffer mechanisms, see further Figure 2It should be added here that the buffer mechanism includes a buffer spring 3122, a buffer guide rod 3121 and a buffer plate 3120. The buffer middle plate is connected to the mounting plate 310. One end of the buffer guide rod 3121 is connected to the driving roller 311, and the other end is kept at a distance from the buffer plate 3120. The buffer spring 3122 is sleeved on the buffer middle guide rod, one end of which is connected to the support of the buffer guide rod 3121, and the other end is connected to the buffer plate 3120. In this way, when the driving roller 311 collides and jumps due to the uneven inner wall of the drilling hole, the buffer guide rod 3121 can impact and squeeze the buffer spring 3122 , thereby causing the buffer spring 3122 to undergo elastic deformation when impacted, absorb energy through deformation, and then return to its original shape after the impact to release the energy, thereby reducing or eliminating the direct impact on the body 30. The buffer plate 3120 maintains a certain distance from one end of the buffer guide rod as a buffer distance, and its function is to provide additional support when the buffer spring 3122 is compressed to the limit position to prevent the buffer spring 3122 from being over-compressed. At the same time, the buffer plate 3120 can be regarded as the end fixing point of the buffer mechanism, and the distance between it and the buffer guide determines the working range of the buffer spring 3122.

[0036] Furthermore, the suspension assembly 2 includes a winder 20, a wire rope 21 and a connector. The winder 20 is arranged on the device body 1 and connected to the wire rope 21 through a winding roller. The surface of the wire rope 21 is provided with a scale, and its bottom end is connected to the connector installed at the top of the slide bar 324. The design of the suspension assembly 2 is to achieve the vertical movement and positioning of the water level detection assembly 3 in the wellbore, and at the same time provide a simple method to measure and record the depth of the water level detection assembly 3 in the wellbore, that is, when the water level detection assembly 3 needs to be placed in the wellbore, the winder 20 releases the wire rope 21, and the water level detection assembly 3 descends accordingly. As the water level detection assembly 3 descends, the wire rope 21 on the winder 20 gradually unfolds, and the scale on its surface also changes accordingly, thereby providing real-time depth feedback of the water level detection assembly 3 entering the wellbore.

[0037] As a further possible implementation of the above embodiment, Figure 3 As shown, a liquid level detection head 4 is also provided at the bottom of the body 30, and a horizontal adjustment mechanism 5 is provided between the liquid level detection head 4 and the body 30. A cavity 40 is provided inside the liquid level detection head 4, and a through hole penetrating the liquid level detection head 4 is opened at the upper portion of the cavity 40. A liquid sensor 41 is provided inside the cavity 40, and the liquid sensor 41 is signal-connected with the control unit of the winding machine 20. When the liquid sensor 41 contacts the liquid, a corresponding electrical signal is generated and transmitted to the control unit of the winding machine 20, so that the control unit sends a stop command to the winding machine 20.

[0038] It should be noted that the liquid level detection head 4 disclosed in this embodiment is a key part of the water level detection equipment. It is designed to be inserted into the water to directly measure the water level, that is, a cavity 40 is provided inside the liquid level detection head 4, and a through hole penetrating the liquid level detection head 4 is opened at the upper part of the cavity 40. Such a design allows the liquid level detection head 4 to enter the borehole and when it is completely immersed in water, the liquid can enter the cavity 40 through the upper through hole, and a liquid sensor 41 is installed inside the cavity 40. When the liquid sensor 41 contacts the liquid, it will generate a corresponding electrical signal, which will be transmitted to the control unit of the winding machine 20 through the signal line. After receiving the signal, the control unit will send a stop command to the winding machine 20, indicating that the liquid level detection head 4 has been completely immersed in the water and it is necessary to stop the further descent of the liquid level detection head 4; and when the liquid level detection head 4 sinks into the water, the horizontal adjustment mechanism 5 will be dynamically adjusted according to the specific conditions of the borehole to keep the liquid level detection head 4 level.

[0039] Specifically, if Figure 3 and Figure 5 As shown, a plurality of distance measuring units are provided between the liquid level detection head 4 and the body 30, and the distance measuring units include a laser distance measuring sensor 60, a detection buoy 61 and a central control module. The laser distance measuring sensor 60 is embedded in the bottom of the body 30 and flush with it, and the detection buoy 61 is installed on the top of the liquid level detection head 4 and corresponds to the laser distance measuring unit one by one. The central control module is integrated on the laser distance measuring sensor 60 and is connected with the liquid sensor 41 signal. When the liquid sensor 41 contacts the liquid and generates a corresponding electrical signal, it is sent to the central control module, so that the central control module sends a start instruction to the laser distance measuring sensor 60.

[0040] When the liquid sensor 41 contacts the liquid, an electrical signal is generated and transmitted to the central control module. After receiving the signal, the central control module understands that the liquid level detection head 4 has been submerged in the water, and then sends a start command to multiple laser ranging sensors 60. The laser ranging sensors 60 start working, measuring and recording the distance from the bottom of the body 30 to the detection buoy 61 at the top of the liquid level detection head 4. In this way, the ranging unit can not only measure the water level height, but also detect the horizontal state of the liquid level detection head 4. Specifically, after multiple laser ranging sensors 60 are working, they can measure the distance data with the corresponding detection buoy 61. At this time, if the distance data measured by multiple laser ranging sensors 60 are consistent, it indicates that the liquid level detection head 4 is parallel to the body 30, that is, the liquid level detection head 4 is in a horizontal state in the water, that is, At this time, the distance from the bottom of the body 30 to the detection buoy 61 at the top of the liquid level detection head 4 is equal to the height data from the bottom of the body 30 to the water surface. At this time, the water level data in the borehole is the sum of the scale data on the wire rope 21, the distance data between the top of the slide bar 324 and the bottom of the body 30, and the height data from the bottom of the body 30 to the water surface measured by multiple laser ranging sensors 60. It should be noted that the distance data between the top of the slide bar 324 and the bottom of the body 30 is a constant, which is obtained by direct measurement; if the measured distance data are inconsistent, it indicates that the liquid level detection head 4 is not parallel to the body 30, that is, the liquid level detection head 4 is in a non-horizontal state. At this time, the laser ranging sensor 60 sends an adjustment instruction to the adjustment rod 51 through the central control module to enable it to adjust the horizontal state of the liquid level detection head 4.

[0041] Furthermore, Figure 3 As shown in the figure, the horizontal adjustment mechanism 5 includes a hemispherical connecting seat 50 and an adjusting rod 51 located around the hemispherical connecting seat 50, the hemispherical connecting seat 50 includes a matching fixed part 500 and a movable part 501, the top of the fixed part 500 is connected to the body 30, the movable part 501 is wrapped around the bottom of the fixed part 500 and is movably adapted to the fixed part 500, and the bottom of the movable part 501 is connected to the liquid level detection head 4, and the adjusting rod 51 is arranged in a ring array; and the top end of the adjusting rod 51 is hinged to the bottom of the body 30, and the bottom end is hinged to the outside of the movable part 501. For the adjusting rod 51, it is preferably an electric telescopic rod, and it is electrically connected to the central control module of the laser ranging sensor 60.

[0042] The specific adjustment of the horizontal adjustment structure is explained here. When the distance data measured by each laser ranging sensor 60 is inconsistent with the corresponding detection buoy 61, the laser ranging sensor 60 sends an adjustment command to the adjustment rod 51 through the central control module. The adjustment rod 51 is an electric telescopic rod. Therefore, when it receives the adjustment command, it can be extended and retracted to push the movable part 501 to rotate on the bottom surface of the fixed part 500, so that the liquid level detection head 4 is fine-tuned by the rotation of the movable part 501 until the distance data measured by all the distance measuring units are consistent, ensuring that the liquid level detection head 4 reaches a horizontal state.

[0043] It should be understood that when the body 30 moves on the inner wall of the wellbore, due to the possible loose geological conditions on the inner wall of the wellbore, it is inevitable that rock protrusions will fall to the bottom of the wellbore, causing the liquid surface to fluctuate, which may cause errors in the water level measurement of the equipment and affect its measurement accuracy.

[0044] Therefore, this embodiment hereby proposes a more preferred implementation method, that is, a falling object collection component 7 is further provided at the lower part of the guide wheel group 31, see Figure 6 The falling object collection assembly 7 includes a telescopic frame 70 and a net bag 71. One end of the telescopic frame 70 is connected to the mounting plate 310, and the other end is connected to the body 30. The net bag 71 is arranged on the telescopic frame 70. When the mounting plate 310 is telescoped along with the telescopic mechanism, the telescopic frame 70 is driven to telescope synchronously.

[0045] By arranging a falling object collection component 7 at the lower part of the guide wheel group 31, the problem of rock protrusions falling due to loose geology in the borehole is effectively solved, thereby reducing the error caused by the fluctuations of the liquid surface to the water level measurement. Specifically, the falling object collection component 7 is composed of a telescopic frame 70 and a net bag 71. One end of the telescopic frame 70 is connected to the mounting plate 310, and the other end is connected to the body 30. The net bag 71 is arranged on the telescopic frame 70. When the mounting plate 310 is telescopically extended along with the telescopic mechanism, the telescopic frame 70 can be driven to be synchronously extended and retracted, so that the rock protrusions that fall due to the collision of the driving roller 311 can be collected in time. In this way, when the body 30 moves along the inner wall of the borehole, the rock protrusions and other falling objects are collected to prevent them from falling into the borehole and causing fluctuations in the water surface, thereby reducing interference with water level measurement, improving the accuracy of the water level measurement results of the equipment, and avoiding the potential damage to the equipment caused by falling objects such as rock lumps falling directly into the water, reducing the impact on the groundwater environment, and enhancing the safety and adaptability of the equipment.

[0046] The above specific implementation methods further describe the purpose, technical scheme and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of the present specification are schematic diagrams, which are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can implement, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effects and purposes that the present invention can produce, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like cited in this specification are only for the convenience of description, and are not used to limit the scope of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the present invention without substantially changing the technical content.

Claims

1. A water level detection device for a rock formation borehole, comprising a device body (1), characterized in that: The bottom of the device body (1) is connected to a water level detection assembly (3) via a suspension assembly (2), and the water level detection assembly (3) comprises a body (30) and a guide wheel assembly (31) located around the body (30), and the guide wheel assembly (31) is used to guide the body (30) when the body (30) enters the wellbore for axial movement; The guide wheel group (31) is arranged in an array around the machine body (30) and is connected to the machine body (30) through a telescopic mechanism. The telescopic mechanism includes a displacement plate (320), a connecting rod (321), an arc-shaped slide rail (322) and a support frame (323). The displacement plate (320) is located on the upper part of the machine body (30), and a slide rod (324) whose bottom end is connected to the machine body (30) is provided through the middle position of the displacement plate (320). The displacement plate (320) is slidably connected to the slide rod (324). The connecting rod (321) is hinged at a side position of the displacement plate (320). The arc-shaped slide rail (322) is attached to the side of the machine body (30). , and the curvature fits the outer contour of the body (30), the support frame (323) is formed into a V-shaped structure by two mutually hinged connecting rods, the free ends of the two connecting rods are hinged to the sliders symmetrically arranged at the two ends of the arc-shaped slide rail (322), and the hinged ends of the two connecting rods are connected to the guide wheel group (31) through a connecting seat, and the upper part of the connecting seat is also hinged to the end of the connecting rod (321) away from the displacement plate (320), and a cylinder (325) is also provided around the bottom of the displacement plate (320) and between the body (30), and the displacement plate (320) is pushed by the cylinder (325) to perform axial movement on the slide rod (324).

2. The water level detection device for rock formation drilling holes according to claim 1 is characterized in that: The guide wheel group (31) comprises a mounting plate (310) connected to the connection seat and a driving roller (311) located on the side of the mounting plate (310); the driving roller (311) and the mounting plate (310) are connected via a buffer mechanism.

3. The water level detection device for rock formation drilling holes according to claim 1 is characterized in that: The suspension assembly (2) comprises a winder (20), a steel wire cable (21) and a connector. The winder (20) is arranged on the device body (1) and is connected to the steel wire cable (21) via a winding roller. The surface of the steel wire cable (21) is provided with a scale, and its bottom end is connected to the connector installed on the top of the sliding rod (324).

4. The water level detection device for rock formation drilling holes according to claim 3 is characterized in that: A liquid level detection head (4) is also provided at the bottom of the machine body (30), a horizontal adjustment mechanism (5) is provided between the liquid level detection head (4) and the machine body (30), a cavity (40) is provided inside the liquid level detection head (4), a through hole penetrating the liquid level detection head (4) is provided at the top of the cavity (40), a liquid sensor (41) is provided inside the cavity (40), and the liquid sensor (41) is signal-connected to a control unit of the winding machine (20), and when the liquid sensor (41) contacts the liquid, a corresponding electrical signal is generated and transmitted to the control unit of the winding machine (20), so that the control unit sends a stop instruction to the winding machine (20).

5. The water level detection device for rock formation drilling holes according to claim 4 is characterized in that: A plurality of distance measuring units are also provided between the liquid level detection head (4) and the body (30), the distance measuring units comprising a laser distance measuring sensor (60), a detection buoy (61) and a central control module. The laser distance measuring sensor (60) is embedded in the bottom of the body (30) and is flush with it. The detection buoy (61) is installed on the top of the liquid level detection head (4) and corresponds to the laser distance measuring unit one by one. The central control module is integrated on the laser distance measuring sensor (60) and is connected to the liquid sensor (41) by signal. When the liquid sensor (41) contacts the liquid and generates a corresponding electrical signal, the electrical signal is sent to the central control module, so that the central control module sends a start instruction to the laser distance measuring sensor (60).

6. The water level detection device for rock formation drilling holes according to claim 5 is characterized by: The horizontal adjustment mechanism (5) comprises a hemispherical connection seat (50) and adjustment rods (51) located around the hemispherical connection seat (50); the hemispherical connection seat (50) comprises a matching fixed portion (500) and a movable portion (501); the top of the fixed portion (500) is connected to the machine body (30); the movable portion (501) is wrapped around the bottom of the fixed portion (500) and is movably matched with the fixed portion (500); the bottom of the movable portion (501) is connected to the liquid level detection head (4); and the adjustment rods (51) are arranged in a ring array.

7. The water level detection device for rock formation drilling holes according to claim 2 is characterized by: A falling object collection assembly (7) is also provided at the lower part of the guide wheel assembly (31), and the falling object collection assembly (7) comprises a telescopic frame (70) and a net bag (71), one end of the telescopic frame (70) is connected to the mounting plate (310), and the other end is connected to the machine body (30), and the net bag (71) is arranged on the telescopic frame (70), and when the mounting plate (310) performs a telescopic action with the telescopic mechanism, the telescopic frame (70) is driven to be telescoped synchronously.

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