Cooperative grouting and monitoring integrated filling device for coal mine goaf

Abstract

The utility model discloses a coal mine goaf collaborative grouting and monitoring integrated filling device, which belongs to the technical field of coal mine goaf filling and comprises a bottom plate, a stirring barrel, a winding roller component and a slurry pump fixed on the top surface of the bottom plate, and the slurry pump is connected with a discharge pipe. A monitoring assembly is arranged in the discharging pipe and comprises a protective shell, a pressure sensor is fixed in the protective shell, and a movable disc is slidably arranged in the protective shell; a spring is arranged between the movable disc and the protective shell, a through hole is formed in the center of a bottom plate of the protective shell, and the top end of the movable rod penetrates through the through hole to be fixedly connected with the center of the movable disc. The monitoring rod is hinged to the inner wall of the discharging pipe, and the two ends of the swing rod are hinged to the bottom end of the movable rod and a rod body of the monitoring rod respectively. When the goaf is nearly full, the pressure of slurry on the pipe wall of the discharging pipe is obviously increased, the monitoring rod moves upwards, the movable disc is driven to move upwards, signals of the pressure sensor are changed, and therefore the grouting condition in the goaf is mastered.

Description

Technical Field

[0001] This utility model belongs to the field of coal mine goaf filling technology, specifically relating to an integrated filling device for coal mine goaf co-grouting and monitoring. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] When mining coal resources, goaf areas are created. As mining continues, the area of ​​the goaf areas expands. If not dealt with in time, it will lead to surface subsidence.

[0004] To address the aforementioned issues, the prior art discloses a coal mine cemented filling device for arranging coal gangue aggregate, comprising a storage bin, wherein the filler material is mixed evenly after entering the storage bin, and a concrete pump delivers the filler material from the storage bin to the goaf to ensure support for the coal mine goaf.

[0005] The above solution has the following drawbacks:

[0006] In the actual filling and grouting process, due to the lack of effective monitoring functions, it is impossible to grasp the grouting situation inside the goaf. When the grouting volume is too large, it is easy to cause grout overflow, which will result in waste of filling materials and increase mining costs. Utility Model Content

[0007] In view of this, the purpose of this utility model is to provide an integrated filling device for grouting and monitoring in coal mine goaf areas. The monitoring component in the filling device can solve the problem that the existing technology lacks effective monitoring functions and cannot grasp the grouting situation inside the goaf area.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] An integrated filling device for grouting and monitoring in coal mine goaf includes a base plate, a mixing tank fixed at one end of the top surface of the base plate, and a winding roller assembly at the other end; a mud pump is fixed between the mixing tank and the winding roller assembly.

[0010] A mixing assembly is installed inside the mixing tank, which is connected to a mud pump. The mud pump is connected to a discharge pipe via a hose. A monitoring assembly is installed inside the discharge pipe, which includes a protective shell fixed to the inner wall of the discharge pipe.

[0011] A pressure sensor is fixed to the top wall inside the protective shell, with the pressure sensor probe facing the bottom plate of the protective shell; a movable disc is slidably installed inside the protective shell, and a spring is installed between the movable disc and the top wall inside the protective shell, with the spring sleeved on the outer periphery of the pressure sensor; a through hole is opened in the center of the bottom plate of the protective shell, and the top of the movable rod passes through the through hole and is fixedly connected to the center of the movable disc.

[0012] The bottom of the movable rod is connected to the monitoring rod via a swing arm. On the side of the protective shell facing the hose, one end of the monitoring rod is hinged to the inner wall of the discharge pipe, and the monitoring rod body is located below the movable rod. The two ends of the swing arm are respectively hinged to the bottom of the movable rod and the monitoring rod body.

[0013] Preferably, the top plate of the mixing tank has a mixing hole, a feeding port, and a water inlet. The mixing hole is located at the center of the top plate of the mixing tank, and the feeding port and water inlet are symmetrically arranged relative to the mixing hole.

[0014] Preferably, a discharge port is opened at the bottom periphery of the mixing tank facing the winding roller assembly, the discharge port is fixed with a discharge pipe, and a cleaning port is opened on the other side, with a cover plate installed on the cleaning port.

[0015] Preferably, the stirring assembly includes a stirring motor, the output end of which is fixedly connected to a stirring shaft, and multiple stirring rods are fixedly arranged along the axial direction of the stirring shaft; the stirring shaft is rotatably connected to the stirring hole, and the stirring motor is fixed to the top plate of the stirring tank.

[0016] Preferably, pistons are provided on both the feed inlet and the water inlet, and handles are provided on the top of the pistons; handles are provided on the outer side of the cover plate.

[0017] Preferably, a protective cover is also fixed to the outside of the stirring motor and the stirring hole, and the protective cover is set between the feeding port and the water inlet.

[0018] Preferably, the take-up roller assembly includes two vertical rods fixed to the top surface of the base plate. At the same height on opposite sides of the two vertical rods, the vertical rods are rotatably connected to turntables, and a take-up roller is fixed between the two turntables.

[0019] Preferably, a rocker arm is fixed at the center of one side of the turntable, and the rocker arm is rotatably connected to the vertical rod; a hand-cranked turntable is fixed at the other end of the rocker arm.

[0020] Preferably, one end of the discharge pipe is connected to the hose, and the other end is fixed with a flared mouth, and a cap is provided on the flared mouth; multiple moving wheels are fixedly installed along the axial direction of the discharge pipe.

[0021] Preferably, casters are installed at the four corners of the bottom surface of the base plate.

[0022] Compared with the prior art, the advantages and positive effects of this utility model are:

[0023] This invention incorporates a monitoring component within the discharge pipe. As the filling slurry is gradually introduced, when the slurry inside the goaf is about to reach the roof or is nearly full, the flow rate of the slurry within the discharge pipe will significantly decrease. At this point, the pressure of the filling slurry on the pipe wall will significantly increase, causing the monitoring rod to move upwards. This, in turn, drives the swing rod, movable rod, and movable disc to move upwards. The spring, under the compression of the movable disc, begins to contract, causing a change in the signal of the pressure sensor, thereby monitoring the grouting status inside the goaf. In addition, this invention also includes a winding roller assembly to wind or unwind the hose, positioning the discharge pipe at the goaf filling position. This adjustable discharge design can adapt to the spatial layout of different goaf areas. Attached Figure Description

[0024] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0025] Figure 1 This is a front perspective view of the filling device according to an embodiment of the present invention;

[0026] Figure 2 This is a right perspective view of the filling device according to an embodiment of the present invention;

[0027] Figure 3 This is a cross-sectional view of the mixing tank according to an embodiment of the present utility model;

[0028] Figure 4 This is a cross-sectional view of the discharge pipe according to an embodiment of the present utility model;

[0029] Figure 5 This is an embodiment of the present utility model. Figure 4 Enlarged view of point A in the middle;

[0030] Figure 6 This is an enlarged schematic diagram of the protective shell according to an embodiment of the present utility model;

[0031] In the picture:

[0032] 1. Base plate; 2. Mixing tank; 3. Mixing assembly; 301. Mixing motor; 302. Mixing shaft; 303. Mixing rod; 4. Feeding port piston; 5. Water supply port piston; 6. Discharge pipe; 7. Casters; 8. Vertical rod; 9. Turntable; 10. Winding roller; 11. Cover plate; 12. Mud pump; 13. Hose; 14. Monitoring assembly; 1401. Protective shell; 1402. Pressure sensor; 1403. Spring; 1404. Movable disc; 1405. Movable rod; 1406. Swing rod; 1407. Monitoring rod. Detailed Implementation

[0033] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0034] The present invention will now be described in detail with reference to the accompanying drawings.

[0035] This embodiment discloses an integrated filling device for collaborative grouting and monitoring in coal mine goaf areas, such as... Figure 1 , Figure 2 As shown, the system includes a base plate 1, with a mixing tank 2 fixed to one end of the top surface of the base plate 1 and a winding roller assembly installed at the other end. A mud pump 12 is fixed between the mixing tank 2 and the winding roller assembly. A mixing assembly 3 is installed inside the mixing tank 2. The discharge port of the mixing tank 2 is connected to the feed port of the mud pump 12, and the discharge port of the mud pump 12 is connected to the discharge pipe 6 via a hose 13. The discharge pipe 6 is pre-positioned in the goaf area. Then, the filling material is added to the mixing tank 2 and mixed evenly by the mixing assembly 3 to obtain the filling slurry. The mud pump 12 then transports the filling slurry to the discharge pipe 6 and discharges it into the goaf area for filling operations.

[0036] like Figure 4 As shown, a monitoring component 14 is installed inside the discharge pipe 6 to monitor the pressure of the slurry filling the discharge pipe 6. Figures 4 to 6 As shown, the monitoring component 14 includes a hollow protective shell 1401, the top of which is fixed to the inner wall of the discharge pipe 6. A pressure sensor 1402 is fixed to the inner top wall of the protective shell 1401, with the probe end of the pressure sensor 1402 facing the bottom plate of the protective shell 1401. A movable disk 1404 is slidably disposed inside the protective shell 1401, and a spring 1403 is disposed between the movable disk 1404 and the inner top wall of the protective shell 1401. The spring 1403 is sleeved on the outer periphery of the pressure sensor 1402. A through hole is opened in the center of the bottom plate of the protective shell 1401, and the top end of the movable rod 1405 passes through the through hole and is fixedly connected to the center of the movable disk 1404. When the movable rod 1405 moves the movable disk 1404 toward the pressure sensor 1402, the spring 1403 can act as a buffer to prevent the movable disk 1404 from suddenly pressing against the pressure sensor 1402 and damaging it.

[0037] like Figures 3 to 6As shown, the monitoring assembly also includes a monitoring rod 1407. Along the axial direction of the discharge pipe 6, on the side of the protective shell 1401 facing the hose, one end of the monitoring rod 1407 is hinged to the inner wall of the discharge pipe 6, so that the rod body of the monitoring rod 1407 is located below the movable rod 1405, and is connected to the bottom end of the movable rod 1405 through a swing rod 1406. Under the pumping of the mud pump 12, the filling slurry is discharged to the goaf through the hose 13 and the discharge pipe 6. When the filling slurry flows through the discharge pipe 6, it drives the monitoring rod 1407 to rotate relative to the discharge pipe 6, so that the monitoring rod 1407 presses against the movable rod 1405, thereby causing the movable rod 1405 to drive the movable disc 1404 to press against the pressure sensor 1402, thus realizing pressure monitoring.

[0038] It is important to note that, such as Figure 5 , Figure 6 As shown, the movable rod 1405 is perpendicular to the inner wall of the discharge pipe 6. The monitoring rod 1407 forms a right-angled triangle with the movable rod 1405 and the inner wall of the discharge pipe 6. If the bottom end of the movable rod 1405 is directly connected to the body of the monitoring rod 1407, the monitoring rod 1407 cannot rotate. A swing rod 1406 is set between the bottom end of the movable rod 1405 and the body of the monitoring rod 1407, so that the two ends of the swing rod 1406 are hinged to the bottom end of the movable rod 1405 and the body of the monitoring rod 1407 respectively, allowing the monitoring rod 1407 to rotate relative to the inner wall of the discharge pipe 6. The spring has elastic force. When the filling slurry has a small force on the inner wall of the discharge pipe 6 (and cannot overcome the spring force), the monitoring rod 1407 cannot force the movable rod 1405 to move towards the pressure sensor 1402.

[0039] It needs to be explained that as the filling slurry is gradually filled, when the filling slurry inside the goaf is about to reach the roof, the flow velocity of the filling slurry in the discharge pipe 6 will significantly decrease. At this time, the pressure of the filling slurry on the pipe wall of the discharge pipe 6 will significantly increase (greater than the spring force), causing the monitoring rod 1407 to move upward, which in turn drives the swing rod 1406, the movable rod 1405, and the movable disc 1404 to move upward. The spring 1403 begins to contract under the compression of the movable disc 1404, causing the signal of the pressure sensor 1402 to change. In this embodiment, a wireless module (such as Wi-Fi, Zigbee, etc.) is used to transmit the data collected by the pressure sensor 1402 to the cloud or local server, and then the data is displayed on an industrial display screen (which supports Modbus). The HMI screen (using TCP / HTTP protocol, pulling cloud data via API) monitors pressure data. When the pressure value received by pressure sensor 1402 exceeds the preset threshold, the mud pump 12 is shut down, and the filling operation is stopped. When the grouting volume is insufficient, the pressure gradually weakens, spring 1403 pushes the movable disc 1404 to reset, and monitoring rod 1407 returns to its initial position. When the pressure value received by pressure sensor 1402 is zero, it is necessary to continue preparing filling slurry and filling.

[0040] like Figures 1 to 3 As shown, the top plate of the mixing tank 2 has a mixing hole, a feeding port, and a water inlet. The mixing hole is located at the center of the top plate of the mixing tank 2, and the feeding port and water inlet are symmetrically arranged opposite to the mixing hole. A discharge port is opened on the bottom side of the mixing tank 2 facing the mud pump 12. A discharge pipe is fixed to the discharge port and connected to the feeding port of the mud pump 12 through the discharge pipe. A cleaning port is opened on the other side of the bottom side of the mixing tank 2. A cover plate 11 is installed on the cleaning port. Opening the cover plate 11 allows the inner wall of the mixing tank 2 to be cleaned.

[0041] like Figure 3 As shown, the stirring assembly 3 includes a stirring motor 301, the output end of which is fixedly connected to a stirring shaft 302. Multiple stirring rods 303 are fixedly arranged along the axial direction of the stirring shaft 302. The stirring shaft 302 is rotatably connected to a stirring hole, and the stirring motor 301 is fixed to the top plate of the stirring tank 2. When the stirring motor 301 is started, it drives the stirring shaft 302 and stirring rods 303 to rotate, thereby uniformly stirring the filling material inside the stirring tank 2. The rotatable connection between the stirring shaft and the stirring hole can be achieved by using bearings.

[0042] like Figure 3 As shown, a feed inlet piston 4 is installed at the feed port, and a water inlet piston 5 is installed at the water inlet. Powdered or solid raw materials are fed into the mixing tank 2 through the feed port, and mixing water is supplied into the mixing tank 2 through the water inlet. Then, the feed inlet piston 4 and the water inlet piston 5 are inserted into the feed port and water inlet respectively. When mixing begins, this ensures that the mixing tank 2 remains sealed and tight to prevent the filling slurry from splashing out during mixing. Both the feed inlet piston 4 and the water inlet piston 5 have handles on their tops for easy removal and insertion from the feed port or water inlet.

[0043] like Figures 1 to 3 As shown, mounting bolts are provided at the top and bottom of the outer side of the cover plate 11. Corresponding threaded holes are made on the side wall of the mixing tank 2 above and below the cleaning port, which can fix the cover plate 11 to the cleaning port and seal the mixing tank 2. When cleaning is required, the mounting bolts are unscrewed to open the cleaning port and clean the inner wall of the mixing tank 2. A handle is provided on the outer side of the cover plate 11 to facilitate the installation or removal of the cover plate 11.

[0044] like Figures 1 to 3 As shown, a protective cover is also fixed on the outside of the mixing motor 301 and the mixing hole. The protective cover is set between the feeding port and the water supply port to prevent the mixing motor 301 from colliding with the mixing motor 301 when raw materials or mixing water are put into the mixing tank 2, which would cause damage to the mixing motor 301.

[0045] like Figures 1 to 3As shown, the take-up roller assembly includes two vertical rods 8 fixed to the top surface of the base plate. At the same height on opposite sides of the two vertical rods 8, the vertical rods 8 are rotatably connected to turntables 9, and a take-up roller 10 is fixed between the two turntables 9.

[0046] It should be noted that a rocker arm is fixed at the center of one side of the turntable 9. The rocker arm is rotatably connected to the vertical rod 8. For example, a hole is opened at the corresponding position of the vertical rod 8 and a bearing is installed so that the rocker arm is connected to the inner ring of the bearing, thereby realizing the rotational connection of the turntable 9. A hand-cranked turntable is fixed at the other end of the rocker arm, and a crank is set on the hand-cranked turntable. The turntable 9 and the take-up roller 10 are rotated by the hand-cranked turntable.

[0047] After the grouting operation is completed, the hose 13 is separated from the mud pump 12, and the hose 13 is wound around the take-up roller 10. The turntable 9 and the take-up roller 10 are rotated by a hand crank to wind up the hose 13, preventing it from scattering, bending, or being damaged. When it is necessary to lay the pipeline step by step, the turntable 9 and the take-up roller 10 are rotated by a hand crank to unwind the hose 13. By winding or unwinding the hose through the take-up roller assembly, the discharge pipe is positioned at the filling location in the goaf. This adjustable discharge design can adapt to the spatial layout of different goaf areas.

[0048] like Figures 3 to 6 As shown, one end of the discharge pipe 6 is connected to the hose 13, and the other end of the discharge pipe 6 is fixed with a flared mouth. A cap is installed on the flared mouth. After the operation and pipe cleaning are completed, the cap is placed on the flared mouth for protection. Multiple moving wheels are fixed along the axial direction of the discharge pipe 6 to facilitate the movement of the discharge pipe 6.

[0049] like Figure 1 As shown, the base plate 1 serves as a supporting base, and casters 7 are installed at the four corners of the bottom surface of the base plate 1. The four sets of casters 7 can provide stable support for the base plate 1 and enable the filling device to move.

[0050] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. An integrated filling device for grouting and monitoring in coal mine goaf areas, characterized in that, The system includes a base plate, with a mixing tank fixed at one end of the top surface of the base plate and a winding roller assembly at the other end; a mud pump is fixed between the mixing tank and the winding roller assembly. A mixing assembly is installed inside the mixing tank, and the mixing tank is connected to the mud pump. The mud pump is connected to the discharge pipe via a hose. A monitoring assembly is installed inside the discharge pipe, and the monitoring assembly includes a protective shell fixed to the inner wall of the discharge pipe. A pressure sensor is fixed to the top wall inside the protective shell, with the pressure sensor probe facing the bottom plate of the protective shell; a movable disk is slidably arranged inside the protective shell, and a spring is arranged between the movable disk and the top wall inside the protective shell, with the spring sleeved on the outer periphery of the pressure sensor; a through hole is opened in the center of the bottom plate of the protective shell, and the top end of the movable rod passes through the through hole and is fixedly connected to the center of the movable disk. The bottom end of the movable rod is connected to the monitoring rod via a swing arm. On the side of the protective shell facing the hose, the monitoring rod is hinged to the inner wall of the discharge pipe, and the monitoring rod body is located below the movable rod. The two ends of the swing arm are respectively hinged to the bottom end of the movable rod and the monitoring rod body.

2. The integrated filling device for collaborative grouting and monitoring in coal mine goaf as described in claim 1, characterized in that, The top plate of the mixing tank has a mixing hole, a feeding port, and a water inlet. The mixing hole is located at the center of the top plate of the mixing tank, and the feeding port and the water inlet are symmetrically arranged relative to the mixing hole.

3. The integrated filling device for grouting and monitoring in coal mine goaf as described in claim 2, characterized in that, The bottom of the mixing tank has a discharge port on one side facing the winding roller assembly, and a discharge pipe is fixed at the discharge port. A cleaning port is opened on the other side, and a cover plate is provided on the cleaning port.

4. The integrated filling device for grouting and monitoring in coal mine goaf as described in claim 3, characterized in that, The stirring assembly includes a stirring motor, the output end of which is fixedly connected to a stirring shaft, and multiple stirring rods are fixedly arranged along the axial direction of the stirring shaft; the stirring shaft is rotatably connected to the stirring hole, and the stirring motor is fixed to the top plate of the stirring tank.

5. The integrated filling device for grouting and monitoring in coal mine goaf as described in claim 4, characterized in that, Both the feed port and the water inlet are equipped with pistons, and the top of the pistons is equipped with handles; the outer side of the cover plate is equipped with handles.

6. The integrated filling device for grouting and monitoring in coal mine goaf as described in claim 5, characterized in that, A protective cover is also fixed to the outside of the stirring motor and the stirring hole, and the protective cover is located between the feeding port and the water supply port.

7. The integrated filling device for collaborative grouting and monitoring in coal mine goaf as described in claim 1, characterized in that, The take-up roller assembly includes two vertical rods fixed to the top surface of the base plate. At the same height on opposite sides of the two vertical rods, the vertical rods are rotatably connected to turntables, and a take-up roller is fixed between the two turntables.

8. The integrated filling device for collaborative grouting and monitoring in coal mine goaf as described in claim 7, characterized in that, A rocker arm is fixed at the center of one side of the turntable, and the rocker arm is rotatably connected to the vertical rod; a hand-cranked turntable is fixed at the other end of the rocker arm.

9. The integrated filling device for collaborative grouting and monitoring in coal mine goaf as described in claim 1, characterized in that, One end of the discharge pipe is connected to the flexible hose, and the other end is fixed with a flared mouth, which is covered with a cap; multiple moving wheels are fixedly installed along the axial direction of the discharge pipe.

10. The integrated filling device for grouting and monitoring in coal mine goaf as described in claim 1, characterized in that, The base plate is equipped with casters at the four corners of its bottom surface.

Images