A depth measuring device for mining goaf exploration

Abstract

This invention relates to the exploration of goaf areas in mines and discloses a depth measuring device for goaf area exploration. The device includes a fixed frame with a mounting plate fixed on it. A water storage tank is also fixed on the fixed frame, and water is stored inside the tank. A retraction assembly is provided on the mounting plate, comprising a motor and a winding wheel. The motor is mounted on the side of the mounting plate, and the winding wheel is fixedly sleeved on the motor. A pull wire is wound around the winding wheel, with one end of the pull wire connected to the winding wheel. This invention achieves directional water delivery by using a motor-driven eccentric wheel to drive a piston in reciprocating motion, combined with a one-way valve-controlled sealed cylinder. During the descent of the distance sensor, water is continuously injected into the counterweight tank to increase its weight, effectively suppressing swaying during descent using gravity. Simultaneously, the counterweight tank continuously provides stable counterweight during the measurement phase, providing dual protection that significantly improves the static and dynamic stability under suspension.

Description

Technical Field

[0001] This invention relates to the exploration of goaf areas in mines, and more particularly to a depth measuring device for the exploration of goaf areas in mines. Background Technology

[0002] Depth measurement in mine goaf exploration is the process of detecting the spatial location, occurrence form and burial depth of underground goaf through geophysical exploration technology or integrated methods. Its core lies in using the difference in physical properties between the target body and the surrounding rock to achieve precise positioning.

[0003] A search revealed Chinese patent CN222895714U, which discloses a depth measuring device for mining goaf exploration, relating to the technical field of depth measuring devices. The device includes a base; a mounting frame is fixedly connected to the base; a turntable and a winding roller are rotatably connected to the mounting frame; a connecting assembly is rotatably connected to the turntable; a reflector is fixedly connected to the bottom of the connecting assembly; a detection component is connected to the reflector; a fixing rope is fixedly connected to the winding roller, with the other end of the rope fixedly connected to the bottom of the connecting assembly; a motor is fixedly connected to the mounting frame via a mounting base; the turntable is fixedly connected to the output shaft of the motor; and the winding roller is connected to the output shaft of the motor via a transmission belt. This solution, by setting up a turntable and a connecting assembly, can effectively explore goaf areas of different depths, while also increasing stability. Adjusting the installation angle of the mounting base solves the problem of inconvenient storage for existing goaf depth measuring devices. However, this solution still has the following shortcomings in practical use: The above-mentioned method of using distance sensors to measure the depth of goaf areas has significant drawbacks in its suspension and lowering operation. The core problem is that the sensors are not stable enough and the operation flexibility is limited when suspended. Due to the open space inside the goaf area and the possibility of airflow disturbance, the sensors will swing irregularly during suspension due to airflow, resulting in drastic fluctuations and poor repeatability of the measurement data. They may even be damaged by violent shaking and collision with the goaf wall. At the same time, the suspension and lowering relies on a single fixed point of rope or robotic arm, making it difficult for operators to adjust the spatial position and detection angle of the sensors in real time according to the complex terrain of the goaf area. For example, it is not possible to accurately get close to the top and bottom plates or inclined surfaces for local measurements, and it is also difficult to avoid obstacles such as water accumulation and loose rocks, resulting in an increase in measurement blind spots and ultimately affecting the integrity and accuracy of the depth data. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that when measuring the depth of mined-out areas by suspending and lowering a distance sensor, the sensor is prone to swinging due to internal airflow, resulting in data distortion. In addition, the fixed-point lowering method restricts the flexible adjustment of position and angle, resulting in an increase in measurement blind spots and a decrease in accuracy. To address this, we propose a depth measuring device for mining goaf exploration.

[0005] To achieve the above objectives, this application adopts the following technical solution: a depth measuring device for mining goaf exploration, including a fixed frame, an mounting plate fixed on the fixed frame, and a water storage tank fixed on the fixed frame, wherein water is stored inside the water storage tank; The mounting plate is provided with a take-up and release assembly, which includes a motor and a winding wheel. The motor is mounted on the side of the mounting plate, and the winding wheel is fixedly sleeved on the motor. A pull wire is wound on the winding wheel, and one end of the pull wire is connected to the winding wheel. The fixed frame is equipped with a measuring component, which includes a main board, a frame and a distance sensor. The main board is connected to the end of the pull wire away from the winding wheel. The frame is arranged on one side of the main board. The distance sensor is installed on the frame. A counterweight water tank is fixed at the bottom of the main board. The fixing frame is equipped with a water supply component for supplying water to the counterweight water tank; The main body is provided with an adjustment component for adjusting the position of the distance sensor, and the mounting bracket is provided with a control component that works in conjunction with the adjustment component for supplying gas.

[0006] Preferably, the measuring component further includes a mounting bracket and a rod. The mounting bracket is fixed to the side of the frame and connected to the main board. The rod is fixed to the frame and a bracket is fixed on the rod. The distance sensor is mounted on the bracket. A counterweight is fixed to the side of the main board away from the frame.

[0007] Preferably, a level is fixed to both the side and top of the frame, and the two level provides a reference for the verticality and horizontality of the distance sensor.

[0008] Preferably, the water supply assembly includes a rotating shaft and a sealing cylinder. The rotating shaft passes through a mounting plate and is rotatably connected to the mounting plate. The rotating shaft is connected to the output shaft of the motor via a meshing first gear and a second gear. An eccentric wheel is fixedly sleeved on the rotating shaft. The sealing cylinder is fixed on a mounting frame with its opening facing upwards. A piston is slidably connected inside the sealing cylinder. A push rod is fixed on the piston, and the top end of the push rod extends to the outside of the sealing cylinder. The piston and the sealing cylinder are connected by a spring. Two mounting pipes are connected to the sealing cylinder. A one-way valve is installed on each of the two mounting pipes. One end of one mounting pipe away from the sealing cylinder is connected to a water storage tank, and the other end of the mounting pipe away from the sealing cylinder is connected to a counterweight water tank.

[0009] Preferably, the two check valves have opposite flow-limiting directions, with one check valve restricting water flow to enter the sealing cylinder only, and the other check valve restricting water flow to exit the sealing cylinder only.

[0010] Preferably, the eccentric wheel is positioned directly opposite the top rod.

[0011] Preferably, the adjustment assembly includes a T-shaped rod and a fixing ring. The T-shaped rod is fixed to the bottom end of the main body, and the fixing ring is fixed to the T-shaped rod. Four circumferential jet nozzles are fixed on the fixing ring, and the four circumferential jet nozzles are arranged in a circumferential array around the fixing ring. Each circumferential jet nozzle is arranged in a horizontal direction. The fixing ring is also provided with two axial jet nozzles. The jetting directions of the two axial jet nozzles are tangent to the fixing ring, and the jetting directions of the two axial jet nozzles are opposite.

[0012] Preferably, the control component includes an air pump and an airflow distributor. The air pump is mounted on a fixed frame, and the airflow distributor is fixed on the fixed frame. The air outlet of the air pump is connected to the airflow distributor through an air supply pipe. The airflow distributor is connected to six connecting pipes, four of which are connected to four circumferential jet nozzles, and the other two are connected to two axial jet nozzles. Each connecting pipe is equipped with a solenoid valve, and the airflow distributor is equipped with six control switches, which are used to control the on / off state of the six solenoid valves.

[0013] Preferably, each of the control switches is provided with a direction indicator.

[0014] Preferably, the mounting bracket is rotatably disposed on the side of the motherboard body, and the side of the motherboard body is provided with a positioning component for adjusting the angle of the mounting bracket.

[0015] The technical effects and advantages of this invention are as follows: In this invention, the piston is driven to reciprocate by a motor-driven eccentric wheel, and the water flow is directionally delivered by a sealed cylinder controlled by a one-way valve. During the descent of the distance sensor, water is continuously injected into the counterweight tank to increase its weight, effectively suppressing swaying during descent by utilizing gravity. At the same time, the counterweight tank continuously provides stable counterweight during the measurement phase, and the dual protection significantly improves the static and dynamic stability in the suspended state. In this invention, circumferential and axial jet nozzles are integrated to form an active anti-interference mechanism. When the sensor swings laterally or rotates around a wire, the corresponding jet nozzle is controlled to generate a reverse thrust or torque to correct the spatial attitude in real time. Combined with the precise control system of air pump-solenoid valve-airflow distributor, it can achieve rapid response and directional adjustment, and greatly improve the measurement anti-interference capability in complex goaf environments. In this invention, a shaft-positioning gear transmission structure is used to achieve 90° rotation switching of the sensor, and mechanical locking of the slide rod-positioning block ensures directional stability. Combined with the double-sided level of the frame, it enables accurate measurement of vertical and horizontal depth. This design takes into account both the need for measurement flexibility and the reliability of directional fixation, effectively expanding the application scenarios and data accuracy of depth exploration in goaf areas. Attached Figure Description

[0016] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 for Figure 1 Enlarged view of the structure at point A; Figure 3 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 4 for Figure 3 Enlarged view of the structure at point B; Figure 5 This is a diagram showing the usage state of the present invention; Figure 6 This is a cross-sectional structural diagram of the present invention; Figure 7 Schematic diagram of the measuring component Figure 1 ; Figure 8 for Figure 7 Enlarged view of the structure at point C; Figure 9 Schematic diagram of the measuring component Figure 2 ; Figure 10 A schematic diagram of the jet direction adjustment component.

[0017] Legend: 1. Fixing frame; 11. Mounting plate; 12. Water tank; 21. Motor; 22. Winding wheel; 23. Pull cable; 31. Main body; 311. Counterweight; 32. Mounting frame; 33. Frame; 331. Level; 34. Rod; 35. Bracket; 36. Distance sensor; 37. Counterweight water tank; 41. Shaft; 42. First gear; 43. Second gear; 44. Eccentric wheel; 45. Sealing cylinder; 451 452. Mounting pipe; 46. Check valve; 47. Piston; 48. Spring; 59. Push rod; 50. T-shaped rod; 51. Retaining ring; 52. Circumferential jet nozzle; 53. Axial jet nozzle; 64. Air pump; 65. Air supply pipe; 66. Airflow distributor; 67. Connecting pipe; 68. Solenoid valve; 69. Control switch; 70. Shaft; 71. Positioning gear; 72. Side plate; 73. Slide rod; 74. Positioning block; 75. V-shaped spring. Detailed Implementation

[0018] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0019] Reference Figure 1 As shown, the present invention provides a technical solution: a depth measuring device for mining goaf exploration, including a fixed frame 1, an mounting plate 11 fixed on the fixed frame 1, and a water storage tank 12 fixed on the fixed frame 1, the water storage tank 12 storing water flow inside; Reference Figure 1 As shown, a take-up and take-down assembly is provided on the mounting plate 11. The take-up and take-down assembly includes a motor 21 and a winding wheel 22. The motor 21 is mounted on the side of the mounting plate 11. The winding wheel 22 is fixedly sleeved on the motor 21. A pull wire 23 is wound on the winding wheel 22, and one end of the pull wire 23 is connected to the winding wheel 22.

[0020] Reference Figure 7 As shown, a measuring component is provided on the fixed frame 1. The measuring component includes a main board 31, a frame 33, and a distance sensor 36. The main board 31 is connected to the end of the pull wire 23 away from the winding wheel 22. The frame 33 is arranged on one side of the main board 31. The distance sensor 36 is installed on the frame 33. A counterweight water tank 37 is fixed at the bottom of the main board 31. The measuring component also includes a mounting bracket 32 ​​and a rod 34. The mounting bracket 32 ​​is fixed on the side of the frame 33 and is connected to the main board 31. The rod 34 is fixed on the frame 33. A bracket 35 is fixed on the rod 34. The distance sensor 36 is installed on the bracket 35. A counterweight block 311 is fixed on the side of the main board 31 away from the frame 33. When using the depth measuring device for mining goaf exploration proposed in this invention, such as... Figure 5 As shown, the staff places the fixing frame 1 in a position facing the goaf, then puts the main body 31 into the goaf and starts the motor 21. When the motor 21 runs, it drives the winding wheel 22 to rotate. When the winding wheel 22 rotates, it releases the pull wire 23, so that the main body 31 and the distance sensor 36 slowly enter the goaf. During this process, the distance sensor 36 measures the depth of the goaf. The specific measurement principle is existing technology and will not be described in detail here.

[0021] Reference Figure 6As shown, a water supply assembly is installed on the fixed frame 1 for supplying water to the counterweight water tank 37. The water supply assembly includes a rotating shaft 41 and a sealing cylinder 45. The rotating shaft 41 passes through the mounting plate 11 and is rotatably connected to the mounting plate 11. The rotating shaft 41 is connected to the output shaft of the motor 21 through a meshing first gear 42 and a second gear 43. An eccentric wheel 44 is fixedly sleeved on the rotating shaft 41. The sealing cylinder 45 is fixed on the fixed frame 1, with the opening of the sealing cylinder 45 facing upwards. A piston 46 is slidably connected inside the sealing cylinder 45, and a push rod 48 is fixed on the piston 46. The eccentric wheel 44 is positioned directly opposite the push rod 48. The top of rod 48 extends to the outside of sealing cylinder 45. Piston 46 is connected to sealing cylinder 45 by spring 47. Two mounting pipes 451 are connected to sealing cylinder 45. One-way valves 452 are installed on both mounting pipes 451. One end of one mounting pipe 451 away from sealing cylinder 45 is connected to water storage tank 12, and the other end of the mounting pipe 451 away from sealing cylinder 45 is connected to counterweight water tank 37. The flow limiting directions of the two one-way valves 452 are opposite. One one-way valve 452 restricts water flow to enter sealing cylinder 45, and the other one-way valve 452 restricts water flow to exit sealing cylinder 45. To improve the stability of the distance sensor 36 in a suspended state, this invention designs a counterweight water tank 37. The purpose is to improve the stability of the distance sensor 36 through the gravity generated by the counterweight water tank 37. When the water flow in the counterweight water tank 37 increases, the overall weight of the main body 31 and its related structures increases, and the stability also increases accordingly. This can effectively reduce the swaying phenomenon that occurs during the descent of the distance sensor 36. Specifically, while the motor 21 drives the winding wheel 22 to rotate, it can also drive the rotating shaft 41 to rotate through the meshing first gear 42 and second gear 43. When the rotating shaft 41 rotates, the eccentric wheel 44 rotates accordingly. Figure 6As shown, the eccentric wheel 44 continuously presses the push rod 48 during rotation. When the push rod 48 is pressed by the eccentric wheel 44, it drives the piston 46 to move downward. When the push rod 48 separates from the eccentric wheel 44, the piston 46 returns to its original position under the action of the spring 47. Therefore, with the rotation of the eccentric wheel 44, the piston 46 continuously moves up and down inside the sealing cylinder 45. Two mounting pipes 451 are connected to the sealing cylinder 45, and one-way valves 452 are installed on both mounting pipes 451. The flow restriction directions of the two one-way valves 452 are opposite. One one-way valve 452 restricts water flow to enter the sealing cylinder 45, and the other one-way valve 452 restricts water flow to exit the sealing cylinder 45. When the piston 46... During descent, piston 46 can force the water in sealing cylinder 45 into counterweight water tank 37 through the corresponding mounting pipe 451. When piston 46 moves upward, piston 46 can draw water from water storage tank 12 through the corresponding mounting pipe 451. Based on the above process, during the descent of distance sensor 36 in the goaf area, sealing cylinder 45 continuously supplies water to counterweight water tank 37 to increase the overall weight of counterweight water tank 37. The counterweight effect applied by counterweight water tank 37 to main body 31 can effectively improve the stability of distance sensor 36 during descent. Similarly, when distance sensor 36 descends to the bottom, counterweight water tank 37 can still play a role to ensure the stability of distance sensor 36 during operation.

[0022] Reference Figure 9 As shown, the main body 31 is provided with an adjustment component for adjusting the position of the distance sensor 36. The adjustment component includes a T-shaped rod 51 and a fixing ring 52. The T-shaped rod 51 is fixed to the bottom end of the main body 31, and the fixing ring 52 is fixed to the T-shaped rod 51. Four circumferential jet nozzles 53 are fixed on the fixing ring 52. The four circumferential jet nozzles 53 are arranged in a circumferential array around the fixing ring 52. Each circumferential jet nozzle 53 is arranged in a horizontal direction. The fixing ring 52 is also provided with two axial jet nozzles 54. The jet direction of the two axial jet nozzles 54 is tangent to the fixing ring 52, and the jet direction of the two axial jet nozzles 54 is opposite. To further address the shaking and rotation of the distance sensor 36, operators can adjust the distance sensor 36 using the adjustment and control components. Specifically, for example... Figure 2 , 4As shown in Figures 9 and 10, four circumferential nozzles 53 are fixed on the fixed ring 52. The four circumferential nozzles 53 are arranged in a circumferential array around the fixed ring 52, and each circumferential nozzle 53 is arranged in a horizontal direction. Two axial nozzles 54 are also provided on the fixed ring 52. The air jet directions of the two axial nozzles 54 are tangent to the fixed ring 52, and the air jet directions of the two axial nozzles 54 are opposite. With the circumferential nozzles 53 and axial nozzles 54 arranged on the fixed ring 52, when the distance sensor 36 swings due to airflow or external force, the circumferential nozzles 53 that are opposite to the swing direction will... The horizontal jet generates a reverse thrust, using the principle of action and reaction to counteract the lateral displacement tendency of the sensor. When the distance sensor 36 rotates around the pull wire 23, the axial jet nozzle 54, which is opposite to the direction of rotation, jets tangentially along the fixed ring 52, generating a reverse torque to neutralize the rotational kinetic energy. The two jet nozzles work together to form a dynamic stabilization system, which corrects the spatial attitude of the distance sensor 36 in real time to eliminate swaying and rotational interference. This active pneumatic adjustment mechanism can dynamically correct the spatial attitude of the distance sensor 36 in real time, significantly improving the stability and anti-interference ability during the measurement process.

[0023] Reference Figure 4 As shown, a control component is provided on the fixed frame 1 for use with the adjustment component to provide gas. The control component includes an air pump 61 and an airflow distributor 62. The air pump 61 is mounted on the fixed frame 1, and the airflow distributor 62 is fixed on the fixed frame 1. The air outlet of the air pump 61 is connected to the airflow distributor 62 through an air supply pipe 611. The airflow distributor 62 is connected to six connecting pipes 63, four of which are connected to four circumferential jet nozzles 53 respectively, and the other two connecting pipes 63 are connected to two axial jet nozzles 54 respectively. Each connecting pipe 63 is equipped with a solenoid valve 64. The airflow distributor 62 is equipped with six control switches 65, which are used to control the opening and closing of the six solenoid valves 64 respectively. Each control switch 65 is equipped with a direction indicator. For the control components, when the operator starts the air pump 61, the air pump 61 supplies air to the airflow distributor 62. When a certain circumferential nozzle 53 or axial nozzle 54 needs to spray air, the operator can press the corresponding control switch 65 to open the solenoid valve 64 at the corresponding position, so that the nozzle can spray air. Each control switch 65 is equipped with a direction indicator for the airflow spray direction, so that the operator can quickly find the control switch 65 corresponding to each nozzle.

[0024] Reference Figure 8 As shown, the mounting bracket 32 ​​is rotatably mounted on the side of the main board body 31. The side of the main board body 31 is provided with a positioning component for adjusting the angle of the mounting bracket 32. The side and top of the frame 33 are both fixed with a level 331. The two level 331 provide a reference for the verticality and horizontality of the distance sensor 36. In this invention, the operator can also adjust the measurement direction of the distance sensor 36. When the distance sensor 36 is in a vertical state, it can measure the vertical depth of the goaf. When the distance sensor 36 is in a horizontal state, it can measure the horizontal depth of the goaf. Specifically, the mounting bracket 32 ​​is rotatably mounted on the side of the main body 31 via a shaft 71. A positioning gear 72 is fixedly sleeved on the shaft 71. A side plate 73 is fixed on the side of the main body 31. Holes are opened on the side plate 73, and a sliding rod 74 slides in the holes. A positioning block 75 is fixed at the bottom of the sliding rod 74, and the positioning block 75 is provided with teeth that are compatible with the positioning gear 72. The sliding rod 74 and the side plate 73 are connected by two V-shaped springs 76. Under the elastic force of the two V-shaped springs 76, the positioning block 75 remains engaged with the positioning gear 72. In this state, the positions of the positioning gear 72 and the shaft 71 are fixed, and the positions of the frame 33 and the distance sensor 36 are also fixed. When the state of the distance sensor 36 needs to be adjusted, the operator first pulls up the slide bar 74, causing the slide bar 74 to move the positioning block 75 until the positioning block 75 separates from the positioning gear 72. Without the restriction of the positioning block 75, the positioning gear 72 and the shaft 71 can rotate freely. At this time, the operator rotates the frame 33 until the distance sensor 36 rotates 90°. Finally, the slide bar 74 is released, so that the positioning block 75 is reset under the action of the two V-shaped springs 76 and re-engages with the positioning gear 72. At this time, the shaft 71 is fixed, and the distance sensor 36 is fixed accordingly. Furthermore, a level 331 is provided on the side and top surface of the frame 33. The operator can use the level 331 to judge the horizontality and verticality of the distance sensor 36.

[0025] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A depth measuring device for exploring goaf areas in mines, characterized in that: Includes a fixed frame (1), on which a mounting plate (11) is fixed, and on which a water storage tank (12) is also fixed, the water storage tank (12) storing water flow; The mounting plate (11) is provided with a take-up and release assembly, which includes a motor (21) and a winding wheel (22). The motor (21) is mounted on the side of the mounting plate (11), and the winding wheel (22) is fixedly sleeved on the motor (21). A pull wire (23) is wound on the winding wheel (22), and one end of the pull wire (23) is connected to the winding wheel (22). The fixing frame (1) is provided with a measuring component, which includes a main board body (31), a frame (33) and a distance sensor (36). The main board body (31) is connected to the end of the pull wire (23) away from the winding wheel (22). The frame (33) is arranged on one side of the main board body (31). The distance sensor (36) is installed on the frame (33). A counterweight water tank (37) is fixed at the bottom of the main board body (31). The fixing frame (1) is equipped with a water supply component for supplying water to the counterweight water tank (37); An adjustment component is provided on the main body (31) for adjusting the position of the distance sensor (36), and a control component is provided on the fixing frame (1) for cooperating with the adjustment component to provide gas; The water supply assembly includes a rotating shaft (41) and a sealing cylinder (45). The rotating shaft (41) passes through the mounting plate (11) and is rotatably connected to the mounting plate (11). The rotating shaft (41) is connected to the output shaft of the motor (21) by a meshing first gear (42) and a second gear (43). An eccentric wheel (44) is fixedly sleeved on the rotating shaft (41). The sealing cylinder (45) is fixed on the mounting bracket (1), and the opening of the sealing cylinder (45) faces upward. A piston (46) is slidably connected inside the sealing cylinder (45). A top rod (48) is fixed on the piston (46), the top end of which extends to the outside of the sealing cylinder (45). The piston (46) and the sealing cylinder (45) are connected by a spring (47). Two mounting pipes (451) are connected to the sealing cylinder (45). A one-way valve (452) is installed on each of the two mounting pipes (451). One end of one mounting pipe (451) away from the sealing cylinder (45) is connected to the water storage tank (12), and the other end of the mounting pipe (451) away from the sealing cylinder (45) is connected to the counterweight water tank (37).

2. The depth measuring device for mining goaf exploration according to claim 1, characterized in that: The measuring assembly also includes a mounting bracket (32) and a rod (34). The mounting bracket (32) is fixed to the side of the frame (33) and is connected to the main board (31). The rod (34) is fixed to the frame (33) and a bracket (35) is fixed on the rod (34). The distance sensor (36) is mounted on the bracket (35). A counterweight (311) is fixed on the side of the main board (31) away from the frame (33).

3. The depth measuring device for mining goaf exploration according to claim 2, characterized in that: The frame (33) is fixed with a level (331) on its side and top. The two level (331) provide a reference for the verticality and horizontality of the distance sensor (36).

4. The depth measuring device for mining goaf exploration according to claim 3, characterized in that: The two check valves (452) have opposite flow-limiting directions. One of the check valves (452) restricts the water flow to enter the sealed cylinder (45), and the other check valve (452) restricts the water flow to exit the sealed cylinder (45).

5. The depth measuring device for mining goaf exploration according to claim 3, characterized in that: The eccentric wheel (44) is positioned opposite the push rod (48).

6. The depth measuring device for mining goaf exploration according to claim 1, characterized in that: The adjustment assembly includes a T-shaped rod (51) and a fixing ring (52). The T-shaped rod (51) is fixed to the bottom end of the main body (31), and the fixing ring (52) is fixed on the T-shaped rod (51). Four circumferential jet nozzles (53) are fixed on the fixing ring (52). The four circumferential jet nozzles (53) are arranged in a circumferential array around the fixing ring (52). Each circumferential jet nozzle (53) is arranged in a horizontal direction. The fixing ring (52) is also provided with two axial jet nozzles (54). The jet direction of the two axial jet nozzles (54) is tangent to the fixing ring (52), and the jet direction of the two axial jet nozzles (54) is opposite.

7. The depth measuring device for mining goaf exploration according to claim 6, characterized in that: The control assembly includes an air pump (61) and an airflow distributor (62). The air pump (61) is mounted on a fixed frame (1), and the airflow distributor (62) is fixed on the fixed frame (1). The air outlet of the air pump (61) is connected to the airflow distributor (62) through an air supply pipe (611). The airflow distributor (62) is connected to six connecting pipes (63), four of which are connected to four circumferential jet nozzles (53) respectively, and the other two connecting pipes (63) are connected to two axial jet nozzles (54) respectively. Each connecting pipe (63) is equipped with a solenoid valve (64). The airflow distributor (62) is equipped with six control switches (65) for controlling the opening and closing of the six solenoid valves (64).

8. The depth measuring device for mining goaf exploration according to claim 7, characterized in that: Each of the control switches (65) is provided with a direction indicator.

9. The depth measuring device for mining goaf exploration according to claim 3, characterized in that: The mounting bracket (32) is rotatably disposed on the side of the main board body (31), and the side of the main board body (31) is provided with a positioning component for adjusting the angle of the mounting bracket (32).

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