Underground water dynamic monitoring device for coal mine water prevention and control

Abstract

The invention relates to the technical field of coal mine water prevention and control dynamic monitoring, in particular to a coal mine water prevention and control underground water dynamic monitoring device which comprises a protective shell, a mounting frame is fixedly connected to the top of the protective shell, and a controller is fixedly connected to the outer wall of the top of the mounting frame. One side of the controller is provided with a signal transmission connector used for transmitting monitoring data. A detection rod is fixedly connected to the bottom of the controller, a floating ball is slidably connected to the circumferential outer wall of the detection rod, an annular seat is fixedly connected to the circumferential inner wall of the floating ball, and a permanent magnet ring is arranged in the annular seat. The cleanliness of the outer wall of the detection rod is guaranteed, the smoothness of the floating ball sliding along the detection rod when the water level rises or falls is further guaranteed, the situation that the timeliness and accuracy of water level sensing are affected due to the fact that water scale hinders movement of the floating ball is prevented, meanwhile, corrosion of the water scale to sensing elements on the surface of the detection rod is reduced, and the service life of the detection rod is prolonged; and long-term stable operation of the whole monitoring device is further ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mine water prevention and control dynamic monitoring, in particular to a coal mine water prevention and control underground water dynamic monitoring device. BACKGROUND

[0002] Coal mine water disaster is one of the main disasters in the production process of coal mine, which seriously threatens the safety production of coal mine and the safety of workers. Underground water dynamic monitoring is the core link of coal mine water prevention and control work. By real-time monitoring of the change of underground water level and other parameters, the water disaster risk can be predicted in time, and scientific basis can be provided for the formulation of water prevention and control measures.

[0003] At present, the underground water is mainly monitored by using mine hydrological monitoring system. When the mine underground water dynamic detection tool is used, the water level sensor is suspended in the underground water layer through a lifting rope, and the detection value of the water level sensor is transmitted to the computer in real time. The water level is dynamically detected in real time by the computer. However, in the process of dynamic detection of the existing monitoring device for mine underground water, if the underground water level increases rapidly, the underground water flow will be turbulent, which will cause the detection tool to deviate or float up and down, thereby affecting the water pressure detection result, or the detection tool will be damaged by the impact of impurities in the water flow, so that the detection tool cannot detect the rapidly rising underground water pressure and quickly respond and issue an alarm, which causes the mine workers to be unable to evacuate in the first time, and there is a risk. Therefore, the coal mine water prevention and control underground water dynamic monitoring device is needed to solve the above problems. SUMMARY

[0004] Based on the deficiencies of the prior art mentioned in the above background technology, the coal mine water prevention and control underground water dynamic monitoring device is provided.

[0005] The present application overcomes the above technical problems by adopting the following technical solutions, in particular: The coal mine water prevention and control underground water dynamic monitoring device comprises a protective shell, a mounting frame fixedly connected to the top of the protective shell, a controller fixedly connected to the top outer wall of the mounting frame, and a signal transmission connector for transmitting monitoring data arranged on one side of the controller. A detection rod is fixedly connected to the bottom of the controller, a floating ball is slidably connected to the circumferential outer wall of the detection rod, an annular seat is fixedly connected to the circumferential inner wall of the floating ball, and a permanent magnet ring is arranged in the annular seat. A filter assembly for blocking impurities in the underground water is arranged at the bottom of the protective shell. A flow stabilizing assembly for avoiding direct impact of the underground water on the floating ball and a protection assembly for protecting the outer wall of the detection rod are arranged in the protective shell.

[0006] Preferably, the filtering assembly comprises a filtering plate fixedly connected to the outer wall of the bottom of the protective shell, the top of the filtering plate is provided with a second filtering hole and a through hole respectively, and the top of the filtering plate is fixedly connected with a filtering cylinder.

[0007] Preferably, the inner diameter of the filtering cylinder gradually decreases in the direction away from the filtering plate, the circumferential outer wall of the filtering cylinder is provided with a first filtering hole, and the inner diameter of the first filtering hole is smaller than the inner diameter of the second filtering hole.

[0008] Preferably, the flow stabilizing assembly comprises a first flow stabilizing bucket fixedly connected to the inner wall of the protective shell, the circumferential inner wall of the first flow stabilizing bucket is fixedly connected with a second flow stabilizing bucket, the circumferential inner wall of the second flow stabilizing bucket is fixedly connected with a third flow stabilizing bucket, and the cross sections of the first flow stabilizing bucket, the second flow stabilizing bucket and the third flow stabilizing bucket are all in the shape of an inverted horn.

[0009] Preferably, one side of the first flow stabilizing bucket is provided with a first water inlet groove, one side of the second flow stabilizing bucket is provided with a second water inlet groove, and the bottom of the third flow stabilizing bucket is provided with a third water inlet groove.

[0010] Preferably, the first water inlet groove is arranged on the right side of the first flow stabilizing bucket, the second water inlet groove is arranged on the left side of the second flow stabilizing bucket, the third water inlet groove is arranged on the middle part of the third flow stabilizing bucket, and the flow stabilizing assembly is located directly above the filtering assembly.

[0011] Preferably, the circumferential outer wall of the detection rod is fixedly connected with a limiting ring block, and the number of the limiting ring blocks is two, and the two limiting ring blocks are located on the upper and lower sides of the floating ball respectively.

[0012] Preferably, the protection assembly comprises a sleeve fixedly connected to the inner wall of the protective shell, the inner part of the sleeve is inserted with a sliding rod, one end of the sliding rod extending to the outside of the sleeve is fixedly connected with a ball head shaft, the ball head shaft is rotatably connected with a ball head seat, and one side of the ball head seat is fixedly connected with a floating ring plate for clamping and protecting the detection rod.

[0013] Preferably, one end of the sliding rod away from the ball head shaft is fixedly connected with a sliding block, and the sliding block is slidingly connected with the inner wall of the sleeve.

[0014] Preferably, the sleeve is arranged in an inclined manner in the inside of the protective shell, and the circumferential outer wall of the sleeve is provided with a through-type drainage hole.

[0015] After the above structure is adopted, compared with the prior art, the present application has the following advantages: 1. In the application, the underground water entering the device is effectively filtered by the filter assembly at the bottom of the protective shell first, avoiding the impurities in a large amount of underground water from entering the inside of the protective shell to pollute the detection rod, thereby causing the water level monitoring result to have a large error, and when the filter assembly blocks the impurities in the underground water, the filter cylinder is fixedly connected to the top outer wall of the filter plate, forming a double filtering structure of the filter cylinder cooperating with the filter plate, wherein the filter cylinder adopts a design that the inner diameter gradually decreases away from the filter plate, the circumferential outer wall is provided with first filter holes, and the inner diameter of the first filter holes is smaller than that of the second filter holes. The combination of the hierarchical pore size and the gradual change structure can make the underground water pass through the first filter holes of the filter cylinder to intercept small-particle-size impurities first, and then flow to the filter plate through the through holes, and filter larger impurities through the second filter holes, realizing efficient layered filtering of different particle size impurities in the underground water, avoiding the influence of impurities entering the inside of the protective shell on the detection accuracy of the whole monitoring device, providing a clean and stable water flow environment for the subsequent monitoring link, and the inverted filter cylinder (because the inner diameter decreases away from the filter plate, it actually assumes an inverted shape of wide at the bottom and narrow at the top) can utilize water flow impact and gravity to reduce the adhesion of impurities on its outer wall, reduce the probability of filter hole blockage caused by impurity accumulation, and ensure the long-term stable filtering efficiency of the filter assembly.

[0016] 2. In the application, the buffered component is provided, the filtered underground water enters the inside of the protective shell, and then flows through the flow stabilizing component located directly above the filter assembly. The first, second and third flow stabilizing hoppers are in the shape of a horn, and the first, second and third water inlets are respectively arranged on the right side, left side and middle part to guide the water flow to pass through in a staggered manner, greatly weakening the water flow impact force and avoiding the direct impact of the rising underground water on the float ball to cause its deviation or up and down floating, thereby providing a stable environment for water level detection and ensuring accurate and reliable detection data. With the change of water level, the float ball sleeved on the detection rod slides along the detection rod through the permanent magnet ring in the annular seat, and the limit ring blocks on both sides of the detection rod can strictly limit the sliding range of the float ball to prevent excessive displacement from affecting the detection accuracy. The detection rod senses the position change of the float ball in real time and transmits the water level data to the top controller, the controller transmits the monitoring data to the external terminal in real time through the signal transmission connector, and realizes real-time monitoring of the underground water.

[0017] 3. In the application, through the setting of the protection assembly, in the process of the rising of the underground water level, the protection assembly inside the protection shell works synchronously, at this time the rising water level will exert an upward thrust on the floating ring plate, when the floating ring plate is subjected to the upward thrust, it will drive the sliding rod to move out from the inside of the sleeve and gradually approach the detection rod, until the floating ring plate stops transverse migration after adhering to the outer wall of the detection rod, at this time the floating ring plate can effectively wrap and protect the detection rod located underwater, avoid the outer wall of the detection rod from producing a large amount of water scale due to long-term immersion in underground water, ensure the cleanliness of the outer wall of the detection rod, and thus ensure the smoothness of the floating ball when sliding along the detection rod when the water level rises or falls, prevent the water scale from hindering the movement of the floating ball and affecting the timeliness and accuracy of the water level sensing, at the same time, reduce the corrosion of the water scale to the surface sensing element of the detection rod, prolong the service life of the detection rod, further protect the long-term stable operation of the whole monitoring device, at the same time, the sleeve is inclined in the protection shell, therefore the floating ring plate and the sliding rod above the floating ball will slide to the inside of the sleeve due to gravity, avoid the floating ring plate from blocking the floating ball when the underground water rises in the future. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an overall front structure schematic diagram of the application.

[0019] Figure 2 It is an overall bottom structure schematic diagram of the application.

[0020] Figure 3 It is an overall structure schematic diagram of the protection shell and the controller after being split.

[0021] Figure 4 It is an enlarged structure schematic diagram of A in the application. Figure 3

[0022] Figure 5 It is an overall semi-sectional plane structure schematic diagram of the application.

[0023] Figure 6 It is an enlarged structure schematic diagram of B in the application. Figure 5

[0024] Figure 7 It is an enlarged structure schematic diagram of C in the application. Figure 5

[0025] Figure 8 It is a semi-sectional structure schematic diagram of the filtering assembly and the flow stabilizing assembly of the application.

[0026] ​​​In the figure: 1, protective shell; 2, mounting bracket; 3, controller; 4, signal transmission connector; 5, filter assembly; 501, filter cartridge; 502, first filter hole; 503, filter plate; 504, second filter hole; 505, through hole; 6, detection rod; 7, limit ring block; 8, protection assembly; 801, sleeve; 802, drain hole; 803, ball head seat; 804, ball head shaft; 805, sliding rod; 806, floating ring plate; 807, sliding block; 9, steady flow assembly; 901, first steady flow hopper; 902, second steady flow hopper; 903, third steady flow hopper; 904, first water inlet groove; 905, second water inlet groove; 906, third water inlet groove; 10, floating ball; 11, annular seat; 12, permanent magnet ring. DETAILED DESCRIPTION

[0027] The technical solutions of the patent will be further described in detail below in combination with specific embodiments.

[0028] The embodiments of the patent will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the patent, and cannot be understood as a limitation on the patent.

[0029] In the description of the patent, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the patent and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the patent.

[0030] In the description of the patent, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meanings of the above terms in the patent can be understood according to the specific circumstances.

[0031] Please refer to Figures 1-8 In the embodiments of the present application, the coal mine water prevention and control underground water dynamic monitoring device comprises a protective shell 1, the top of the protective shell 1 is fixedly connected with a mounting bracket 2, the top outer wall of the mounting bracket 2 is fixedly connected with a controller 3, and one side of the controller 3 is provided with a signal transmission connector 4 for transmitting monitoring data; The bottom of the controller 3 is fixedly connected with a detection rod 6, the outer wall of the circumference of the detection rod 6 is slidably connected with a floating ball 10, the inner wall of the circumference of the floating ball 10 is fixedly connected with an annular seat 11, the inside of the annular seat 11 is provided with a permanent magnet ring 12, with the change of water level, the floating ball 10 sleeved on the detection rod 6 slides along the detection rod 6 through the permanent magnet ring 12 in the annular seat 11, the limiting ring block 7 on both sides of the detection rod 6 can strictly limit the sliding range of the floating ball 10, prevent its excessive displacement from affecting the detection precision, the detection rod 6 senses the position change of the floating ball 10 in real time and transmits the water level data to the top controller 3, the controller 3 transmits the monitoring data to the external terminal in real time through the signal transmission connector 4, realizes the real-time monitoring of underground water dynamics; The bottom of the protective shell 1 is provided with a filter assembly 5 for blocking impurities in underground water; The inside of the protective shell 1 is provided with a flow stabilizing assembly 9 for avoiding direct impact of underground water on the floating ball 10 and a protection assembly 8 for protecting the outer wall of the detection rod 6.

[0032] Further, the filter assembly 5 includes a filter plate 503 fixedly connected to the outer wall of the bottom of the protective shell 1, the top of the filter plate 503 is respectively provided with a second filter hole 504 and a through hole 505, the outer wall of the top of the filter plate 503 is fixedly connected with a filter cylinder 501, the filter plate 503 is communicated with the filter cylinder 501 through the through hole 505, the filter assembly 5 at the bottom of the protective shell 1 first effectively filters the underground water entering the device, avoids a large amount of impurities in the underground water from entering the inside of the protective shell 1 to pollute the detection rod 6, thereby causing the water level monitoring result to have a large error, and when the filter assembly 5 blocks the impurities in the underground water, the filter cylinder 501 is fixedly connected to the outer wall of the top of the filter plate 503, forming a double filtering structure of the filter cylinder 501 cooperating with the filter plate 503.

[0033] Further, the inner diameter of the filter cartridge 501 gradually decreases in the direction away from the filter plate 503, the circumferential outer wall of the filter cartridge 501 is provided with a first filter hole 502, the inner diameter of the first filter hole 502 is smaller than the inner diameter of the second filter hole 504, and the inner diameter of the first filter hole 502 is smaller than the inner diameter of the second filter hole 504. The combination of such hierarchical pore size and gradual change structure can make the underground water first pass through the first filter hole 502 of the filter cartridge 501 to intercept smaller particle size impurities, then flow to the filter plate 503 through the through hole 505, and filter larger impurities through the second filter hole 504, realizing efficient layered filtration of different particle size impurities in the underground water, avoiding impurities entering the inside of the protective shell 1 to affect the monitoring accuracy of the whole detection device, providing a clean and stable water flow environment for the subsequent monitoring link. At the same time, the inverted filter cartridge 501 (because the inner diameter decreases in the direction away from the filter plate 503, it actually assumes an inverted shape with a wide bottom and a narrow top) can use water flow impact and gravity to reduce the adhesion of impurities on its outer wall, reduce the probability of filter hole blockage caused by impurity accumulation, and ensure the long-term stable filtration effect of the filter assembly 5.

[0034] Further, the flow stabilizing assembly 9 includes a first flow stabilizing bucket 901 fixedly connected to the circumferential inner wall of the protective shell 1, the circumferential inner wall of the first flow stabilizing bucket 901 is fixedly connected with a second flow stabilizing bucket 902, the circumferential inner wall of the second flow stabilizing bucket 902 is fixedly connected with a third flow stabilizing bucket 903, the cross sections of the first flow stabilizing bucket 901, the second flow stabilizing bucket 902 and the third flow stabilizing bucket 903 are all in inverted trumpet shape, one side of the first flow stabilizing bucket 901 is provided with a first water inlet groove 904, one side of the second flow stabilizing bucket 902 is provided with a second water inlet groove 905, and the bottom of the third flow stabilizing bucket 903 is provided with a third water inlet groove 906. The first water inlet groove 904 is provided on the right side of the first flow stabilizing bucket 901, the second water inlet groove 905 is provided on the left side of the second flow stabilizing bucket 902, and the third water inlet groove 906 is provided in the middle of the third flow stabilizing bucket 903. The flow stabilizing assembly 9 is located directly above the filter assembly 5, and the filtered underground water enters the inside of the protective shell 1 and then flows through the flow stabilizing assembly 9 located directly above the filter assembly 5. The trumpet-shaped first flow stabilizing bucket 901, the second flow stabilizing bucket 902 and the third flow stabilizing bucket 903 guide the water flow to pass through in a staggered manner through the first water inlet groove 904, the second water inlet groove 905 and the third water inlet groove 906 provided on the right side, the left side and the middle respectively, greatly weakening the water flow impact force, avoiding the direct impact of the rising underground water on the float ball 10, and causing the float ball 10 to deviate or float up and down, providing a stable environment for water level detection and ensuring the accuracy and reliability of the detection data.

[0035] Further, the circumferential outer wall of the detection rod 6 is fixedly connected with a limiting ring block 7, the number of the limiting ring blocks 7 is two, and the two limiting ring blocks 7 are respectively located on the upper and lower sides of the float ball 10. The two limiting ring blocks 7 can avoid the float ball 10 from floating up and down out of range.

[0036] Further, the protection assembly 8 comprises a sleeve 801 fixedly connected to the circumferential inner wall of the protection shell 1, a sliding rod 805 is inserted into the sleeve 801, one end of the sliding rod 805 extending to the outside of the sleeve 801 is fixedly connected with a ball shaft 804, the ball shaft 804 is rotatably connected with a ball seat 803, one side of the ball seat 803 is fixedly connected with a floating ring plate 806 for clamping and protecting the detection rod 6, during the process of the rising of the underground water level, the protection assembly 8 in the protection shell 1 plays a synchronous role at this time, at this time, the rising water level will exert an upward thrust on the floating ring plate 806, when the floating ring plate 806 is subjected to the upward thrust, the sliding rod 805 will move out from the inside of the sleeve 801 and gradually approach the detection rod 6, until the floating ring plate 806 stops moving horizontally after adhering to the outer wall of the detection rod 6, at this time, the floating ring plate 806 can effectively wrap and protect the detection rod 6 located underwater, avoiding that the detection rod 6 is soaked in the underground water for a long time to cause a large amount of water scale on the outer wall, ensuring the cleanliness of the outer wall of the detection rod 6, and further ensuring the smoothness of the floating ball 10 when sliding along the detection rod 6 when the water level rises or falls, preventing the water scale from hindering the movement of the floating ball 10 to affect the timeliness and accuracy of the water level sensing, and also reducing the corrosion of the water scale on the surface sensing element of the detection rod 6, prolonging the service life of the detection rod 6, and further ensuring the long-term stable operation of the entire monitoring device.

[0037] Further, one end of the sliding rod 805 away from the ball shaft 804 is fixedly connected with a sliding block 807, the sliding block 807 is slidingly connected with the circumferential inner wall of the sleeve 801, and the sliding rod 805 can be stably slid in the sleeve 801 through the sliding block 807.

[0038] Further, the sleeve 801 is inclined arranged in the protection shell 1, the floating ring plate 806 and the sliding rod 805 located above the floating ball 10 will slide to the inside of the sleeve 801 due to gravity, avoiding the situation that the floating ring plate 806 blocks the floating ball 10 when the underground water rises in the subsequent process, and the circumferential outer wall of the sleeve 801 is provided with a through-type drain hole 802, which can avoid the situation that the accumulated water in the sleeve 801 cannot be discharged when the underground water level drops, causing the sliding rod 805 to fail to reset.

[0039] Working principle: in use, first deploy the device to the coal mine underground water monitoring area, in the monitoring process, through the filter assembly 5 at the bottom of the protective shell 1 first to the underground water entering the device is effectively filtered, avoid a large number of impurities in the groundwater into the protective shell 1 inside the detection rod 6 caused by pollution, thus leading to the water level monitoring result error larger situation occurs, and in the filter assembly 5 blocks the impurities in the groundwater, through the filter plate 503 top outer wall is fixedly connected with filter cartridge 501, forms the filter cartridge 501 cooperation filter plate 503 double filter structure, wherein, filter cartridge 501 adopts the gradually reducing design of the inner diameter along away from the filter plate 503 direction, its circumferential outer wall is provided with first filter hole 502, and the inner diameter of first filter hole 502 is smaller than that of second filter hole 504, the combination of this hierarchical aperture and the gradual change structure can make the groundwater first pass through the first filter hole 502 of filter cartridge 501 to intercept small particle size impurities, and then flow to the filter plate 503 through the through hole 505, and filter larger impurities through the second filter hole 504, realize efficient layered filtration of different particle size impurities in the groundwater, avoid impurities entering the protective shell 1 inside influence the monitoring accuracy of the whole detection device, provide clean, stable water flow environment for subsequent monitoring link, and the inverted filter cartridge 501 (because the inner diameter decreases along away from the filter plate 503 direction, actually use the inverted shape of wide bottom and narrow top) can utilize water flow impact and gravity effect, reduce the adhesion of impurities on its outer wall, reduce the probability of filter hole blockage caused by impurity accumulation, guarantee the long-term stable filtration effect of filter assembly 5; The filtered groundwater enters the protective shell 1 inside, and then flows through the flow stabilizing assembly 9 located directly above the filter assembly 5. The first, second and third flow stabilizing hoppers 901, 902 and 903 are trumpet-shaped and guide the water flow to pass through the first, second and third water inlet grooves 904, 905 and 906 respectively arranged on the right, left and middle to stagger the water flow and greatly weaken the water flow impact force, avoiding the direct impact of the rising groundwater on the float ball 10, which may cause the float ball 10 to deviate or float up and down, thereby providing a stable environment for water level monitoring and ensuring accurate and reliable detection data. As the water level changes, the float ball 10 on the detection rod 6 slides along the detection rod 6 through the permanent magnet ring 12 in the annular seat 11. The limit ring 7 on both sides of the detection rod 6 strictly limits the sliding range of the float ball 10 to prevent excessive displacement and affect the detection accuracy. The detection rod 6 senses the position change of the float ball 10 in real time and transmits the water level data to the top controller 3. The controller 3 transmits the monitoring data to the external terminal in real time through the signal transmission connector 4, realizing real-time monitoring of the groundwater. In the process of the rising of the groundwater level, the protection assembly 8 in the protection shell 1 works synchronously, at this time, the rising water level will exert an upward thrust on the floating ring plate 806, when the floating ring plate 806 is subjected to the upward thrust, the sliding rod 805 will be moved out from the inside of the sleeve 801 and gradually close to the detection rod 6, until the floating ring plate 806 stops moving horizontally after adhering to the outer wall of the detection rod 6, at this time, the floating ring plate 806 can effectively wrap and protect the detection rod 6 located underwater, avoid the detection rod 6 from being soaked in the groundwater for a long time to cause a large amount of water scale on the outer wall, ensure the cleanliness of the outer wall of the detection rod 6, and then ensure the smoothness of the floating ball 10 when sliding along the detection rod 6 when the water level rises or falls, prevent the water scale from hindering the movement of the floating ball 10 to affect the timeliness and accuracy of the water level sensing, at the same time, reduce the corrosion of the water scale on the surface sensing element of the detection rod 6, prolong the service life of the detection rod 6, further protect the long-term stable operation of the entire detection device, at the same time, the sleeve 801 is inclined in the protection shell 1, therefore, the floating ring plate 806 and the sliding rod 805 located above the floating ball 10 will slide to the inside of the sleeve 801 due to gravity, avoid the floating ring plate 806 from blocking the floating ball 10 when the groundwater rises in the subsequent process.

[0040] It is obvious to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application.

Claims

1. A dynamic monitoring device for groundwater control in coal mines, comprising a protective shell (1), characterized in that, The top of the protective shell (1) is fixedly connected to a mounting bracket (2), and the top outer wall of the mounting bracket (2) is fixedly connected to a controller (3). A signal transmission connector (4) for transmitting monitoring data is provided on one side of the controller (3). The bottom of the controller (3) is fixedly connected to a detection rod (6), a float (10) is slidably connected to the outer circumference of the detection rod (6), an annular seat (11) is fixedly connected to the inner circumference of the float (10), and a permanent magnet ring (12) is provided inside the annular seat (11). The bottom of the protective shell (1) is provided with a filter assembly (5) for blocking impurities in groundwater. The protective shell (1) is equipped with a flow stabilizing component (9) to prevent groundwater from directly impacting the float (10) and a protective component (8) to protect the outer wall of the detection rod (6).

2. The dynamic monitoring device for groundwater control in coal mines according to claim 1, characterized in that, The filter assembly (5) includes a filter plate (503) fixedly connected to the bottom outer wall of the protective shell (1). The top of the filter plate (503) is provided with a second filter hole (504) and a through hole (505). A filter cylinder (501) is fixedly connected to the top outer wall of the filter plate (503). The filter plate (503) is connected to the filter cylinder (501) through the through hole (505).

3. The groundwater dynamic monitoring device for coal mine water control according to claim 2, characterized in that, The inner diameter of the filter cylinder (501) gradually decreases in the direction away from the filter plate (503), and a first filter hole (502) is provided on the outer circumferential wall of the filter cylinder (501). The inner diameter of the first filter hole (502) is smaller than the inner diameter of the second filter hole (504).

4. The dynamic monitoring device for groundwater control in coal mines according to claim 3, characterized in that, The flow stabilizing assembly (9) includes a first flow stabilizing hopper (901) fixedly connected to the inner circumference of the protective shell (1), a second flow stabilizing hopper (902) fixedly connected to the inner circumference of the first flow stabilizing hopper (901), and a third flow stabilizing hopper (903) fixedly connected to the inner circumference of the second flow stabilizing hopper (902). The cross-sections of the first flow stabilizing hopper (901), the second flow stabilizing hopper (902), and the third flow stabilizing hopper (903) are all inverted trumpet shape.

5. The groundwater dynamic monitoring device for coal mine water control according to claim 4, characterized in that, The first flow stabilizer (901) has a first water inlet trough (904) on one side, the second flow stabilizer (902) has a second water inlet trough (905) on one side, and the third flow stabilizer (903) has a third water inlet trough (906) at the bottom.

6. The groundwater dynamic monitoring device for coal mine water control according to claim 5, characterized in that, The first water inlet tank (904) is located on the right side of the first flow stabilizer (901), the second water inlet tank (905) is located on the left side of the second flow stabilizer (902), the third water inlet tank (906) is located in the middle of the third flow stabilizer (903), and the flow stabilizer component (9) is located directly above the filter component (5).

7. The groundwater dynamic monitoring device for coal mine water control according to claim 6, characterized in that, The outer circumferential wall of the detection rod (6) is fixedly connected to a limiting ring block (7). There are two limiting ring blocks (7), which are located on the upper and lower sides of the float (10) respectively.

8. The groundwater dynamic monitoring device for coal mine water control according to claim 7, characterized in that, The protective assembly (8) includes a sleeve (801) fixedly connected to the inner circumferential wall of the protective shell (1). A slide rod (805) is inserted inside the sleeve (801). A ball head shaft (804) is fixedly connected to one end of the slide rod (805) extending to the outside of the sleeve (801). A ball head seat (803) is rotatably connected to the ball head shaft (804). A floating ring plate (806) for clamping and protecting the detection rod (6) is fixedly connected to one side of the ball head seat (803).

9. The dynamic monitoring device for groundwater control in coal mines according to claim 8, characterized in that, The end of the slide rod (805) away from the ball head shaft (804) is fixedly connected to a slider (807), and the slider (807) is slidably connected to the inner circumferential wall of the sleeve (801).

10. The groundwater dynamic monitoring device for coal mine water control according to claim 8, characterized in that, The sleeve (801) is inclined inside the protective shell (1), and the outer circumferential wall of the sleeve (801) is provided with a through-hole (802).

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