Depth measuring device for mining goaf exploration

Abstract

A mine goaf exploration depth measuring device disclosed by the present invention comprises a body, the top of the body is movably connected with a supporting structure and a hanging assembly, the hanging assembly is located at the central position of the top surface of the body, and the supporting structure comprises four supporting columns which slidably penetrate through the body and a connecting plate which fixedly connects the tops of the four supporting columns. The body is provided with four first through holes allowing the four supporting columns to be connected in a sliding and penetrating mode, and the connecting plate is movably connected with a soil sample collecting assembly and a gas sample collecting assembly close to the hanging assembly; the bottom of the body is movably connected with a water sample collection assembly; the device can be used for sampling water samples, gas samples and soil samples, can also be used for detecting the depth, water depth, flow direction and flow velocity of a goaf, and is diversified in function, practical and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of mine exploration equipment, in particular to a depth measuring device for exploring a mine goaf. Background Art

[0002] In the process of coal mining, underground coal resources need to be mined and transported away. Generally, in the process of excavation, a method similar to the mountain tunnel on the road is adopted to gradually open up the tunnel between the underground coal location and the coal mine mouth. Generally, the ore and coal encountered in the mining process are transported to the ground to form a reasonable transportation and mining operation surface. With the continuous transportation of coal and other ores, coal goafs are formed underground. The existence of goafs makes the safe production of mines face great safety problems. People and mechanical equipment may fall into the goafs and be injured. The underground goafs are highly hidden, the spatial distribution characteristics are poorly regular, and the roof of the goafs is prone to collapse.

[0003] Patent CN118328883A discloses a depth measuring device for exploring a goaf in a mine, which includes a connecting column and a connecting seat, a depth sounder is arranged on the top of the connecting seat, a connecting slot is provided on the connecting seat, an insertion slot is provided on the side wall of the connecting column, a limit slot corresponding to the insertion slot is provided in the connecting seat, a limit block and a limit spring are arranged in the limit slot, the limit block is movably connected to the connecting seat, both ends of the limit spring are fixedly connected to the limit block and the connecting seat, an insertion block is arranged at the end of the limit block near the connecting slot, and a soil extraction component, a gas extraction component and a water extraction component are arranged below the connecting seat. The staff connects the rope to the connecting column, lowers the connecting seat to the bottom of the goaf, samples and detects the soil, air and groundwater at the bottom of the goaf through the soil extraction component, the gas extraction component and the water extraction component, and the depth sounder measures the depth of the goaf, so that the connecting column is separated from the connecting seat, which is convenient for the staff to explore another goaf through the connecting column.

[0004] The existing measuring devices can be improved to sample the air, soil and water in the goaf. Although this overcomes the shortcoming of traditional measuring devices that they can only measure depth, they are only for sampling and cannot effectively measure important parameters such as the water depth, flow velocity, flow direction and other important parameters of the goaf. It still cannot fully meet the needs of goaf exploration. Summary of the invention

[0005] The purpose of the present invention is to provide a depth measuring device for exploring mine goafs in view of the above situation. The device can not only take water samples, gas samples and soil samples, but also detect the depth, water depth, flow direction and flow velocity of the goafs. The device has various functions and is practical and convenient.

[0006] The specific scheme of the present invention is: a depth measuring device for exploring mine goafs, comprising a main body, the top of the main body being movably connected with a support structure and a hanging assembly, the hanging assembly being located at the center of the top surface of the main body, the support structure comprising four support columns slidingly passing through the main body and a connecting plate fixedly connecting the tops of the four support columns, the main body being provided with four first through holes for slidingly passing the four support columns, the connecting plate being movably connected with a soil sample collection assembly and a gas sample collection assembly close to the hanging assembly; the bottom of the main body being movably connected with a water sample collection assembly.

[0007] By adopting the above technical scheme, the staff connects the rope to the hanging assembly, and then gradually puts it into the goaf. If the tension on the rope decreases, but there is still a downward tension, it means that there is water flow at the bottom of the goaf, and the body contacts the water flow. At this time, the water sample collection assembly and the gas sample collection assembly work to collect water samples and gas samples. The water sample collection assembly can detect the flow rate and flow direction. After the collection is completed, the support structure drives the soil sample collection assembly to extend downward from the body, and then continues to lower the rope until the tension on the rope changes for the second time and disappears to zero, indicating that the device has been lowered to the bottom, and then the soil sample collection assembly is used to collect soil samples; if the rope is directly reduced to zero when the force changes for the first time during the lowering process, it means that there is no water at the bottom of the goaf or the water volume is very small; at the same time, according to the force change during the lowering of the rope, the depth and water depth of the goaf can be measured. Therefore, the present invention is used to explore the goaf, not only can water samples, gas samples, and soil samples be sampled, but also the depth, water depth, flow direction, and flow velocity of the goaf can be detected, which has various functions and is practical and convenient.

[0008] The present invention is further configured as follows: the main body is in an arc-shaped smooth transition shape with a wide middle and narrow ends.

[0009] By adopting the above technical solution, when the device is placed in water, it will automatically adjust to the direction of the water flow according to the direction of the water flow, and will not rotate continuously, affecting the water flow detection effect. Moreover, when detecting the flow direction and flow rate of groundwater, the arc-shaped smooth transition shape will make the water flow smoothly, reduce fluctuations, avoid a large impact on the flow rate detection, and ensure the accuracy of the detection.

[0010] The present invention is further configured as follows: a first telescopic rod is embedded in the top of the body, the first telescopic rod adopts an automatically controlled telescopic structure, and the telescopic end of the first telescopic rod is fixedly connected to the connecting plate.

[0011] By adopting the above technical solution, the connecting plate connects the four supporting columns and the soil sample collection assembly into a whole, and the first telescopic rod is used to drive the telescopic columns and the soil sample collection assembly to rise and fall. The purpose of this design is to avoid that when collecting water samples, the supporting columns and the soil sample collection assembly will cause certain obstructions, thereby causing water flow swirl and fluctuations, etc., affecting the accuracy of flow velocity and flow direction measurement.

[0012] The present invention is further configured as follows: the soil sample collection assembly includes a collection tube, the main body is provided with a second through hole for the collection tube to move, a first connecting rod is fixedly connected to the top of the collection tube, the first connecting rod is fixedly connected to the connecting plate, a partition is fixedly provided in the collection tube, the partition separates the first collection barrel into a piston chamber and a sample storage chamber, a piston plate is slidably connected in the piston chamber, a motor is fixedly connected to the bottom of the piston plate, the motor is rotatably connected to a rotating shaft, and the rotating shaft is fixedly connected to a drill bit and an auger after passing through the partition.

[0013] By adopting the above technical solution, the piston chamber can be designed as a pneumatic, hydraulic or oil pressure telescopic structure. The piston plate and the motor are used to drive the rotating shaft, auger and drill bit to rotate and move downward to penetrate into the soil. After penetration, the motor stops running, the piston chamber is evacuated, and the piston plate drives the rotating shaft, auger, drill bit and soil sample back into the collection tube to complete soil sample collection. After sampling is completed, when the rope drives the device to move upward, the soil sample will not be dispersed by the water flow due to the protection of the collection tube, thereby ensuring the effectiveness of the sample.

[0014] The present invention is further configured as follows: the drill bit is a conical structure, and the radius of the circular bottom surface is equal to the inner diameter of the collection tube.

[0015] By adopting the above technical solution, the auger can be ensured to conveniently pound the soil, and at the same time, the drill bit can be used to seal the collection tube when the auger carries the soil sample back to the collection tube, so as to prevent water from washing away the soil sample.

[0016] The present invention is further configured as follows: the hanging assembly includes a T-shaped hanging rod, the main body is provided with a first limiting hole for the T-shaped hanging rod to move, a pressure sensor is provided in the first limiting hole, and a hanging ring is provided on the top surface of the T-shaped hanging rod.

[0017] By adopting the above technical solution, when the device is lowered into the goaf, the entire device will apply pressure to the pressure sensor; when it is lowered into the groundwater, the force on the pressure sensor will be reduced due to the buoyancy of the main body; when it is lowered to the bottom, the force on the pressure sensor will be reduced to zero. Therefore, by judging the pressure changes transmitted back by the pressure sensor, the depth of the goaf and the depth of the groundwater in the goaf can be judged.

[0018] The present invention is further configured as follows: a corrugated rubber sealing tube is connected between the side wall of the T-shaped hanging rod and the body.

[0019] By adopting the above technical solution, since the T-shaped hanging rod needs to move up and down in the first limiting hole, and water cannot enter the first limiting hole, otherwise the force detected on the pressure sensor will be inaccurate. Therefore, a corrugated rubber sealing tube is designed to cut off the water flow without affecting the movement of the T-shaped hanging rod.

[0020] The present invention is further configured as follows: the gas sample collection component includes a collection chamber, a collection port is provided on the top of the collection chamber, an air valve is provided in the collection port, an air pump is connected to the bottom of the air valve, a sampling port is provided on the side of the collection chamber, the sampling port passes through the top of the main body and is provided with a cover.

[0021] By adopting the above technical solution, when the rope undergoes the first force change during the lowering process, the air valve opens and the air pump starts to collect gas. After the collection is completed, the air valve is immediately closed to prevent it from entering the water. After the water enters the collection chamber, the gas sample is taken out through the cover body. The cover body can be made of soft rubber material, and the needle tube is directly inserted into the sampling port for sampling.

[0022] The present invention is further configured as follows: the water sample collection assembly includes a collection tube, the collection tube is fixedly connected to the main body, both ends of the collection tube are slidably connected with piston blocks, a second connecting rod is fixedly connected between the two piston blocks, a second telescopic rod is embedded in the main body, and the telescopic end of the second telescopic rod is fixedly connected to one of the piston blocks.

[0023] By adopting the above technical solution, when the water sample collection assembly enters the water body, the second telescopic rod drives the two piston blocks to move downward. At this time, the piston block away from the second telescopic rod leaves the collection tube, and the water sample enters the collection tube. Then the second telescopic rod drives the piston block back into the collection tube. At this time, the water sample is stored between the two piston blocks, which is efficient and fast.

[0024] The present invention is further configured as follows: a sleeve is rotatably sleeved on the outside of the collection tube, a propeller-type flowmeter is fixedly connected to the sleeve, the sleeve is rotatably connected to the body, the body is provided with a slot for the sleeve to rotate, a linear electrode sheet is embedded on the top of the sleeve, the electrode sheet is parallel to the axis of the propeller-type flowmeter and is close to the propeller end of the propeller-type flowmeter, and the collection tube is fixedly sleeved with an annular induction sheet close to the electrode sheet.

[0025] By adopting the above technical scheme, the propeller current meter can be used to detect the flow velocity. At the same time, the propeller current meter itself has the function of automatically adjusting the direction. When entering the water, under the action of the water flow, the propeller end will automatically rotate to the direction against the water flow. Since the electrode sheet is parallel to the axis of the propeller current meter and close to the propeller end of the propeller current meter, the annular sensor sheet will sense the position of the electrode sheet and generate an induction signal. The direction of the water flow can be determined according to the position of the induction signal, which is intuitive and clear.

[0026] The present invention has the following beneficial effects: 1. The present invention connects the rope to the hanging assembly through the staff, and then gradually puts it into the goaf. If the tension on the rope decreases, but there is still a downward tension, it means that there is water flow at the bottom of the goaf, and the body contacts the water flow. At this time, the water sample collection assembly and the gas sample collection assembly work to collect water samples and gas samples. The water sample collection assembly can detect the flow rate and flow direction. After the collection is completed, the support structure drives the soil sample collection assembly to extend downward from the body, and then continues to lower the rope until the tension on the rope changes for the second time and disappears to zero, indicating that the device has been lowered to the bottom, and then the soil sample collection assembly is used to collect soil samples; if the rope is directly reduced to zero when the force changes for the first time during the lowering process, it means that there is no water at the bottom of the goaf or the amount of water is very small; at the same time, according to the force change during the lowering of the rope, the depth and water depth of the goaf can be measured. Therefore, the present invention is used to explore the goaf, not only can water samples, gas samples, and soil samples be sampled, but also the depth, water depth, flow direction, and flow velocity of the goaf can be detected, with diverse functions and practical convenience; 2. The present invention utilizes the arc-shaped smooth transition of the main body, which is wide in the middle and narrow at both ends. When the device is placed in water, it will automatically adjust to the direction of the water flow according to the direction of the water flow, and will not rotate all the time to affect the water flow detection effect. In addition, when detecting the flow direction and flow velocity of groundwater, the arc-shaped smooth transition shape will make the water flow smoothly, reduce fluctuations, avoid a large impact on the flow velocity detection, and ensure the accuracy of the detection; 3. The present invention connects four support columns and the soil sample collection assembly into a whole through a connecting plate, and uses a first telescopic rod to drive the telescopic columns and the soil sample collection assembly to rise and fall. The purpose of this design is to avoid that the support columns and the soil sample collection assembly will cause certain obstructions during water sample collection, thereby causing water flow swirls and fluctuations, etc., affecting the accuracy of flow velocity and flow direction measurement; 4. The piston chamber of the present invention can be designed as a pneumatic, hydraulic or oil pressure telescopic structure, and the piston plate and the motor are used to drive the rotating shaft, the auger and the drill bit to rotate and move downward to drive into the soil. After driving, the motor stops running, the piston chamber is evacuated, and the piston plate drives the rotating shaft, the auger, the drill bit and the soil sample to be retracted into the collection tube to complete the soil sample collection. After the sampling is completed, when the rope driving device moves upward, the soil sample will not be dispersed by the water flow due to the protection of the collection tube, thereby ensuring the effectiveness of the sample; the drill bit structure of the drill bit ensures that the auger can be conveniently driven into the soil, and at the same time, the drill bit can be used to seal the collection tube when the auger carries the soil sample back to the collection tube to prevent the water flow from washing the soil sample; 5. The present invention utilizes the design of the hanging assembly. When the device is lowered in the goaf, the entire device will apply pressure to the pressure sensor; when it is lowered into the groundwater, the force on the pressure sensor will be reduced due to the buoyancy of the main body; when it is lowered to the bottom, the force on the pressure sensor will be reduced to zero. Therefore, by judging the pressure change transmitted back by the pressure sensor, the depth of the goaf and the depth of the groundwater in the goaf can be judged; because the T-shaped hanging rod needs to move up and down in the first limit hole, and water cannot enter the first limit hole, otherwise the force detected on the pressure sensor will be inaccurate, so a corrugated rubber sealing tube is designed to cut off the water flow without affecting the movement of the T-shaped hanging rod; 6. In the present invention, when the rope undergoes the first force change during the lowering process, the air valve is opened, and the air pump is started to collect gas. After the collection is completed, the air valve is immediately closed to prevent the gas from entering the water. After the sampling is completed, the gas sample is taken out through the cover body. The cover body can be made of soft rubber material, and the needle tube is directly inserted into the sampling port for sampling; 7. After the water sample collection assembly enters the water body, the second telescopic rod drives the two piston blocks to move downward. At this time, the piston block away from the second telescopic rod leaves the collection tube, and the water sample enters the collection tube. Then the second telescopic rod drives the piston block back into the collection tube. At this time, the water sample is stored between the two piston blocks, which is efficient and fast. 8. The present invention utilizes a propeller flow meter to detect flow velocity. The propeller flow meter itself has the function of automatically adjusting direction. When it enters the water, under the action of the water flow, the propeller end will automatically rotate to the direction against the water flow. Since the electrode sheet is parallel to the axis of the propeller flow meter and close to the propeller end of the propeller flow meter, the annular sensor sheet will sense the position of the electrode sheet and generate an induction signal. The direction of the water flow can be determined according to the position of the induction signal, which is intuitive and clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 1 is an external structural diagram of the device in an embodiment of the present invention (slanting from top to bottom); Figure 2: is an external structural diagram of the device in an embodiment of the present invention (slanting from bottom to top); Figure 3 yes Figure 1 Internal structure diagram below the middle BB section (soil sample collection component); Figure 4 yes Figure 1 Internal structure diagram under the middle BB section (gas sample collection component, hanging component); Figure 5 yes Figure 3 Enlarged structural diagram at A in the middle.

[0028] In the figure: 1, body; 11, first through hole; 12, second through hole; 14, pressure sensor; 15, notch; 2, support structure; 21, support column; 22, connecting plate; 23, first telescopic rod; 3, hanging assembly; 31, T-shaped hanging rod; 32, hanging ring; 33, corrugated rubber sealing tube; 4, soil sample collection assembly; 41, collection tube; 42, first connecting rod; 43, partition; 431, piston chamber; 432, sample storage chamber; 44 , piston plate; 45, click; 46, rotating shaft; 47, auger; 48, drill bit; 5, gas sample collection assembly; 51, collection chamber; 52, collection port; 53, air valve; 54, air pump; 55, sampling port; 56, cover body; 6, water sample collection assembly; 61, collection tube; 62, piston block; 63, second connecting rod; 64, second telescopic rod; 65, casing; 66, propeller flowmeter; 67, electrode sheet; 68, annular sensor sheet. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. It is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention. In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the invented product is usually placed when used, which are only for the convenience of describing the present invention or simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The following is an embodiment of the present invention: See also Figure 1 to Figure 5 As shown, a depth measuring device for exploring a goaf in a mine includes a body 1, which is in the shape of an arc with a smooth transition, wide in the middle and narrow at both ends. When the device is placed in water, it will automatically adjust to the direction of the water flow according to the direction of the water flow, and will not rotate all the time to affect the water flow detection effect. In addition, when detecting the flow direction and flow velocity of groundwater, the arc-shaped smooth transition shape will make the water flow smoothly, reduce fluctuations, avoid a large impact on the flow velocity detection, and ensure the accuracy of the detection.

[0032] The top of the body 1 is movably connected with a support structure 2 and a hanging assembly 3, and the hanging assembly 3 is located at the center of the top surface of the body 1. The support structure 2 includes four support columns 21 that slide through the body 1 and a connecting plate 22 that fixes the tops of the four support columns 21. The body 1 is provided with four first through holes 11 for the four support columns 21 to slide through, and the connecting plate 22 is movably connected with a soil sample collection assembly 4 and a gas sample collection assembly 5 near the hanging assembly 3. A first telescopic rod 23 is embedded on the top of the body 1, and the first telescopic rod 23 adopts an automatically controlled telescopic structure, and the telescopic end of the first telescopic rod 23 is fixedly connected to the connecting plate 22. The connecting plate 22 connects the four support columns 21 and the soil sample collection assembly 4 as a whole, and uses the first telescopic rod 23 to drive the telescopic columns and the soil sample collection assembly 4 to rise and fall. The purpose of this design is to avoid that the support columns 21 and the soil sample collection assembly 4 will cause certain obstructions when collecting water samples, thereby generating water flow swirls and fluctuations, etc., affecting the accuracy of flow velocity and flow direction measurement.

[0033] The soil sample collection assembly 4 includes a collection tube 41. The main body 1 is provided with a second through hole 12 for the collection tube 41 to move. A first connecting rod 42 is fixedly connected to the top of the collection tube 41. The first connecting rod 42 is fixedly connected to the connecting plate 22. A partition 43 is fixedly provided in the collection tube 41. The partition 43 separates the first collection barrel into a piston chamber 431 and a sample storage chamber 432. A piston plate 44 is slidably connected in the piston chamber 431. A motor is fixedly connected to the bottom of the piston plate 44. The motor is rotatably connected to a rotating shaft 46. After the rotating shaft 46 passes through the partition 43, it is fixedly connected to a drill bit 48 and an auger 47.

[0034] The piston chamber 431 can be designed as a pneumatic, hydraulic or oil pressure telescopic structure. The piston plate 44 and the motor are used together to drive the rotating shaft 46, the auger 47 and the drill bit 48 to rotate and move downward to penetrate into the soil. After penetration, the motor stops running, the piston chamber 431 is evacuated, and the piston plate 44 drives the rotating shaft 46, the auger 47, the drill bit 48 and the soil sample to be retracted into the collection tube 41 to complete the soil sample collection. After the sampling is completed, when the rope drives the device to move upward, due to the protection of the collection tube 41, the soil sample will not be dispersed by the water flow, thereby ensuring the effectiveness of the sample.

[0035] The drill bit 48 is a conical structure, and the radius of the circular bottom surface is equal to the inner diameter of the collection tube 41. While ensuring that the auger 47 can easily drill the soil, the drill bit 48 can be used to seal the collection tube 41 when the auger 47 carries the soil sample to retract the collection tube 41, so as to prevent the water flow from scouring the soil sample. The hanging assembly 3 includes a T-shaped hanging rod, and the main body 1 is provided with a first limit hole for the movement of the T-shaped hanging rod 31. The first limit hole is provided with a pressure sensor 14, and the top surface of the T-shaped hanging rod is provided with a hanging ring 32. When the device is lowered in the goaf, the pressure sensor 14 will be given pressure by the entire device; when it is lowered into the groundwater, the force on the pressure sensor 14 will be reduced due to the buoyancy of the main body 1; when it is lowered to the bottom, the force on the pressure sensor 14 will be reduced to zero, so by judging the pressure change transmitted back by the pressure sensor 14, the depth of the goaf and the depth of the groundwater in the goaf can be judged.

[0036] A corrugated rubber sealing tube 33 is connected between the side wall of the T-shaped hanging rod and the main body 1. Since the T-shaped hanging rod needs to move up and down in the first limiting hole, and water cannot enter the first limiting hole, otherwise the force detected on the pressure sensor 14 will be inaccurate, the corrugated rubber sealing tube 33 is designed to cut off the water flow without affecting the movement of the T-shaped hanging rod. The gas sample collection component 5 includes a collection chamber 51, a collection port 52 is provided at the top of the collection chamber 51, an air valve 53 is provided in the collection port 52, an air pump 54 is connected to the bottom of the air valve 53, and a sampling port 55 is provided on the side of the collection chamber 51, and the sampling port 55 passes through the top of the main body 1 and is provided with a cover 56. When the rope undergoes the first force change during the lowering process, the air valve 53 opens and the air pump 54 starts to collect gas. After the collection is completed, the air valve 53 is immediately closed to prevent it from entering the water. The water enters the collection chamber 51. After the sampling is completed, the gas sample is taken out through the cover 56. The cover 56 can be made of soft rubber material, and the needle is directly inserted into the sampling port 55 for sampling.

[0037] The bottom of the body 1 is movably connected with a water sample collection component 6. The water sample collection component 6 includes a collection tube 61, which is fixedly connected to the body 1. Both ends of the collection tube 61 are slidably connected with piston blocks 62. A second connecting rod 63 is fixedly connected between the two piston blocks 62. A second telescopic rod 64 is embedded in the body 1, and the telescopic end of the second telescopic rod 64 is fixedly connected to one of the piston blocks 62. When the water sample collection component 6 enters the water body, the second telescopic rod 64 drives the two piston blocks 62 to move downward. At this time, the piston block 62 away from the second telescopic rod 64 leaves the collection tube 61, and the water sample enters the collection tube 61. Then the second telescopic rod 64 drives the piston block 62 back into the collection tube 61. At this time, the water sample is stored between the two piston blocks 62, which is efficient and fast. A sleeve 65 is rotatably sleeved on the outside of the collection tube 61, and a propeller flow meter 66 is fixedly connected to the sleeve 65. The sleeve 65 is rotatably connected to the main body 1, and the main body 1 is provided with a slot 15 for the sleeve 65 to rotate. A linear electrode sheet 67 is embedded in the top of the sleeve 65, and the electrode sheet 67 is parallel to the axis of the propeller flow meter 66 and close to the propeller end of the propeller flow meter 66. The collection tube 61 is fixedly sleeved with an annular sensing sheet 68 close to the electrode sheet 67. The propeller flow meter 66 can be used to detect flow velocity. At the same time, the propeller flow meter 66 itself has the function of automatically adjusting the direction. When entering the water, under the action of the water flow, the propeller end will automatically rotate to the direction against the water flow. Since the electrode sheet 67 is parallel to the axis of the propeller flow meter 66 and close to the propeller end of the propeller flow meter 66, the annular sensor sheet 68 will sense the position of the electrode sheet 67 and generate an induction signal. The direction of the water flow can be determined according to the position of the induction signal, which is intuitive and clear.

[0038] Working principle: The staff connects the rope to the hanging component 3, and then gradually puts it into the goaf. If the tension on the rope decreases, but there is still a downward pulling force, it means that there is water flow at the bottom of the goaf, and the body 1 is in contact with the water flow. At this time, the water sample collection component 6 and the gas sample collection component 5 work to collect water and gas samples. The water sample collection component 6 can detect the flow rate and flow direction. After the collection is completed, the support structure 2 drives the soil sample collection component 4 to extend downward from the body 1, and then continues to lower the rope until the tension on the rope changes for the second time, and If it disappears to zero, it means that the device has been lowered to the bottom, and soil samples are collected through the soil sample collection component 4; if the force change of the rope occurs for the first time during the lowering process and then directly drops to zero, it means that there is no water at the bottom of the goaf or the amount of water is very small; at the same time, according to the force change during the lowering of the rope, the depth and water depth of the goaf can be measured. Therefore, the present invention is used to explore the goaf, not only for sampling water samples, gas samples, and soil samples, but also for detecting the depth, water depth, flow direction, and flow velocity of the goaf, with diverse functions and practical convenience.

[0039] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A depth measuring device for exploring a mine goaf, characterized in that: The invention comprises a main body (1), the top of the main body (1) is movably connected with a support structure (2) and a hanging assembly (3), the hanging assembly (3) is located at the center of the top surface of the main body (1), the support structure (2) comprises four support columns (21) that slide through the main body (1) and a connecting plate (22) that fixes the tops of the four support columns (21), the main body (1) is provided with four first through holes (11) for the four support columns (21) to slide through, the connecting plate (22) is movably connected with a soil sample collection assembly (4) and a gas sample collection assembly (5) close to the hanging assembly (3); the bottom of the main body (1) is movably connected with a water sample collection assembly (6).

2. A depth measuring device for exploring a mine goaf according to claim 1, characterized in that: The body (1) is in an arc-shaped smooth transition shape, wide in the middle and narrow at both ends.

3. A depth measuring device for exploring a mine goaf according to claim 1, characterized in that: A first telescopic rod (23) is embedded in the top of the body (1); the first telescopic rod (23) adopts an automatically controlled telescopic structure; the telescopic end of the first telescopic rod (23) is fixedly connected to the connecting plate (22).

4. A depth measuring device for exploring a mine goaf according to claim 1, characterized in that: The soil sample collection assembly (4) comprises a collection tube (41). The body (1) is provided with a second through hole (12) for the collection tube (41) to move. The top of the collection tube (41) is fixedly connected with a first connecting rod (42). The first connecting rod (42) is fixedly connected to the connecting plate (22). A partition (43) is fixedly provided inside the collection tube (41). The partition (43) separates the first collection barrel into a piston chamber (431) and a sample storage chamber (432). A piston plate (44) is slidably connected inside the piston chamber (431). The bottom of the piston plate (44) is fixedly connected with a motor. The motor is rotatably connected with a rotating shaft (46). The rotating shaft (46) passes through the partition (43) and is fixedly connected with a drill bit (48) and an auger (47).

5. A depth measuring device for exploring a mine goaf according to claim 4, characterized in that: The drill bit (48) is of a conical structure, and the radius of the circular bottom surface is equal to the inner diameter of the collection tube (41).

6. A depth measuring device for exploring a mine goaf according to claim 1, characterized in that: The hanging assembly (3) comprises a T-shaped hanging rod, the main body (1) is provided with a first limiting hole for the T-shaped hanging rod (31) to move, a pressure sensor (14) is provided in the first limiting hole, and a hanging ring (32) is provided on the top surface of the T-shaped hanging rod.

7. A depth measuring device for exploring a mine goaf according to claim 6, characterized in that: A corrugated rubber sealing tube (33) is connected between the side wall of the T-shaped hanging rod and the body (1).

8. A depth measuring device for exploring a mine goaf according to claim 1, characterized in that: The gas sample collection component (5) comprises a collection chamber (51), the top of the collection chamber (51) is provided with a collection port (52), an air valve (53) is provided in the collection port (52), the bottom of the air valve (53) is connected to an air pump (54), and the side of the collection chamber (51) is provided with a sampling port (55), the sampling port (55) passes through the top of the body (1) and is provided with a cover (56).

9. A depth measuring device for exploring a mine goaf according to claim 1, characterized in that: The water sample collection assembly (6) comprises a collection tube (61), the collection tube (61) is fixedly connected to the body (1), both ends of the collection tube (61) are slidably connected to piston blocks (62), a second connecting rod (63) is fixedly connected between the two piston blocks (62), a second telescopic rod (64) is embedded in the body (1), and the telescopic end of the second telescopic rod (64) is fixedly connected to one of the piston blocks (62).

10. A depth measuring device for exploring a mine goaf according to claim 9, characterized in that: A sleeve (65) is rotatably sleeved on the outer side of the collection tube (61), and the sleeve (65) is fixedly connected to a propeller-type flow meter (66). The sleeve (65) is rotatably connected to the body (1), and the body (1) is provided with a slot (15) for the sleeve (65) to rotate. A linear electrode sheet (67) is embedded in the top of the sleeve (65), and the electrode sheet (67) is parallel to the axis of the propeller-type flow meter (66) and is close to the propeller end of the propeller-type flow meter (66). The collection tube (61) is fixedly sleeved with an annular induction sheet (68) close to the electrode sheet (67).

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