Mine filling paste umbrella-shaped diffusion pressure stabilizing device
By designing an umbrella-shaped diffusion and pressure stabilizing device for mine filling paste, the problem of unstable slurry velocity during mine filling process was solved, achieving uniform diffusion of slurry and reduction of kinetic energy, thereby reducing pipeline wear and safety hazards.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA MINMETALS CHANGSHA MINING RES INST
- Filing Date
- 2025-09-15
- Publication Date
- 2026-07-17
AI Technical Summary
During the mine backfilling process, direct pipe injection can cause unstable slurry velocity, which can easily lead to problems such as head throwing, segregation, pipe wear and blockage, posing safety hazards.
Design a mine filling paste umbrella-shaped diffusion and pressure stabilizing device, including a rotating flow guiding mechanism, a pressure stabilizing buffer cavity, a conical umbrella disk and a self-cleaning device. The rotating flow guiding mechanism converts the kinetic energy of the slurry, the pressure stabilizing buffer cavity reduces the flow rate, the conical umbrella disk diffuses evenly, and the self-cleaning device prevents the through holes from being blocked.
It achieves uniform diffusion of slurry, reduces impact and pipe wear, prevents segregation and blockage, improves the support performance of the filling material, and reduces safety hazards.
Smart Images
Figure CN224515233U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mining technology for mine backfilling, and in particular to a mine backfilling paste umbrella-shaped diffusion and pressure stabilizing device arranged at the outlet of the backfilling pipeline in the goaf, which is used to achieve uniform and stable diffusion distribution of high-concentration paste slurry, and avoid secondary damage caused by slurry segregation and impact. Background Technology
[0002] During mine backfilling, when direct-pipe injection is used and the stability of the backfill slurry is poor, the slurry velocity is unstable before exiting the pipe, easily causing strong vibrations in the backfill pipe and a tendency for the slurry to swing out of its path. This also makes pipeline maintenance extremely difficult, highlighting the obvious drawbacks of this direct-pipe injection method. Some mines have made corresponding improvements, such as using a simple cone shape to disperse some pressure, but the results are still unsatisfactory. The main problems are as follows: First, the impact force of unloading is large; the impact kinetic energy of the high-speed slurry easily erodes the bottom and walls of the goaf, potentially damaging reserved pillars, false roofs, or bottom structures, creating safety hazards. Second, the high-speed flowing slurry is prone to severe segregation in actual operations, weakening the overall support performance of the backfill body. Third, the flow disturbance generated by the high-speed impact of the slurry causes severe vibrations in the pipeline system, accelerating the wear of pipe fittings, flanges, and elbows. Furthermore, simple nozzles are prone to aggregate blockage or slurry sedimentation, leading to pipe blockage accidents that are extremely difficult to handle.
[0003] Based on the above problems, the development of a mine filling paste umbrella-shaped diffusion pressure stabilizing device that can effectively reduce impact force and alleviate pipeline wear has important engineering application value. Utility Model Content
[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a mine filling paste umbrella-shaped diffusion pressure stabilizing device that can actively regulate the flow state of paste slurry, achieve uniform diffusion, reduce outlet kinetic energy, prevent aggregate segregation, and has a self-cleaning function.
[0005] This utility model provides a mine filling paste umbrella-shaped diffusion pressure stabilizing device, including a rotating guide mechanism arranged sequentially along the slurry flow direction, a pressure stabilizing buffer cavity connected to the outlet end of the filling pipe, a conical umbrella disk connected to the outlet end of the pressure stabilizing buffer cavity, and a self-cleaning device surrounding the outer periphery of the pressure stabilizing buffer cavity; the rotating guide mechanism includes a rotatable annular bearing disposed on the inner wall of the filling pipe and a plurality of guide blades disposed on the rotatable annular bearing; the pressure stabilizing buffer cavity is a cylindrical pipe section with a diameter larger than that of the filling pipe; the conical umbrella disk is provided with a plurality of through holes; the self-cleaning device includes an annular air pipe surrounding the outer periphery of the pressure stabilizing buffer cavity and a plurality of nozzles disposed on the annular air pipe, the nozzles being oriented towards the through holes; the annular air pipe is connected to a compressed air source through a pipeline.
[0006] As a further improvement of this utility model, the inclination angle of the guide vane is 15°-18°.
[0007] As a further improvement of this utility model, the through hole includes at least one first microhole disposed in the top central region of the conical umbrella disk, a plurality of second microholes disposed in the middle annular region of the conical umbrella disk, and a plurality of third microholes disposed in the edge annular region of the conical umbrella disk.
[0008] As a further improvement of this utility model, the diameter of the first micropore is smaller than the diameter of the second micropore, and the diameter of the second micropore is smaller than the diameter of the third micropore.
[0009] As a further improvement of this utility model, the diameter of the first micropore is in the range of 6-8 mm, the diameter of the second micropore is in the range of 10-12 mm, and the diameter of the third micropore is in the range of 18-20 mm.
[0010] As a further improvement of this utility model, a plurality of the guide vanes are circumferentially distributed on the rotatable annular bearing.
[0011] As a further improvement of this utility model, the number of guide vanes is 6-8.
[0012] As a further improvement of this utility model, the rotating guide mechanism is positioned 1-2 meters away from the outlet of the filling pipe.
[0013] As a further improvement of this utility model, the cone angle of the conical umbrella disc is 60°-80°.
[0014] As a further improvement of this utility model, the annular air pipe is a stainless steel annular air pipe, and the nozzles are evenly arranged on the annular air pipe.
[0015] The beneficial effects of this utility model are:
[0016] This utility model provides a mine filling paste umbrella-shaped diffusion pressure stabilizing device, which sequentially includes a rotating guide mechanism, a pressure stabilizing buffer chamber, a conical umbrella disc, and a self-cleaning device surrounding the pressure stabilizing buffer chamber along the slurry flow direction. Under the action of the rotating guide mechanism, the slurry in the filling pipe changes from axial motion to rotational motion, converting linear kinetic energy into rotational kinetic energy, effectively weakening the axial impact force. Subsequently, the slurry enters the pressure stabilizing buffer chamber, further reducing its kinetic energy and minimizing the impact on the original pipeline and the sway amplitude at the outlet. The through-holes on the conical umbrella disc further reduce the slurry flow velocity. Finally, the self-cleaning device cleans the through-holes promptly, preventing solidification and blockage.
[0017] This invention can effectively regulate the flow state of paste slurry, achieve uniform diffusion, reduce outlet kinetic energy, reduce slurry impact force, reduce pipeline wear, and has a self-cleaning function. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of the umbrella-shaped diffusion and pressure stabilizing device for mining filling paste according to this utility model.
[0019] Figure 2 This is a schematic diagram of the rotating guide mechanism.
[0020] Figure 3 This is a schematic diagram showing the position of the guide vanes.
[0021] Figure 4 This is a schematic diagram of the conical umbrella disc structure.
[0022] The components in the attached diagram are labeled as follows:
[0023] 10-Filling tube; 11-Welding area; 21-Rotable annular bearing; 22-Guide vane; 30-Pressure stabilizing buffer cavity; 40-Conical umbrella disc; 41-First micropore; 42-Second micropore; 43-Third micropore; 51-Annular air tube; 52-Nozzle; 60-Connector. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0025] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.
[0026] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0027] Please see Figures 1 to 4 As shown, this utility model provides a mine filling paste umbrella-shaped diffusion pressure stabilizing device, including a rotating guide mechanism arranged sequentially along the slurry flow direction, a pressure stabilizing buffer cavity 30 connected to the outlet end of the filling pipe 10, a conical umbrella disk 40 connected to the outlet end of the pressure stabilizing buffer cavity 30, and a self-cleaning device arranged around the outer periphery of the pressure stabilizing buffer cavity 30.
[0028] The rotating guide mechanism includes a rotatable annular bearing 21 disposed on the inner wall of the filling pipe 10 and a plurality of guide vanes 22 disposed on the rotatable annular bearing 21. The inclination angle of the guide vanes 22 is 15°-18°. In this embodiment, the rotatable annular bearing 21 is welded to the inner wall of the filling pipe 10, and the mark 11 in the figure refers to the welding area.
[0029] In this embodiment, the rotating guide mechanism is positioned 1-2 meters away from the outlet of the filling pipe 10.
[0030] Several guide vanes 22 are evenly distributed circumferentially on a rotatable annular bearing 21. The number of guide vanes is 6-8. With this arrangement, the guide vanes 22 will rotate under the impact of the slurry, changing the original axial motion of the slurry into rotational motion, converting linear kinetic energy into rotational kinetic energy, and effectively weakening the axial impact force.
[0031] The pressure-stabilizing buffer chamber 30 is a cylindrical pipe section with a diameter larger than that of the filling pipe 10, and the pressure-stabilizing buffer chamber 30 is connected to the filling pipe 10 by a connector 60. By setting the pressure-stabilizing buffer chamber 30 at the outlet end of the filling pipe 10, the flow rate of the slurry is further reduced, forming a buffer pressure-stabilizing chamber, which further reduces the kinetic energy of the slurry, thereby reducing the impact on the original pipeline and the sway amplitude of the outlet end.
[0032] In this embodiment, the conical umbrella disc 40 is a steel conical umbrella disc, and the conical umbrella disc 40 is provided with a plurality of through holes arranged in a gradient. Specifically, the through holes include at least one first microhole 41 provided in the top central region of the conical umbrella disc 40, a plurality of second microholes 42 provided in the middle annular region of the conical umbrella disc 40, and a plurality of third microholes 43 provided in the edge annular region of the conical umbrella disc 40.
[0033] The diameter of the first micropore 41 is smaller than the diameter of the second micropore 42, and the diameter of the second micropore 42 is smaller than the diameter of the third micropore 43. The diameter of the first micropore 41 ranges from 6 to 8 mm, the diameter of the second micropore 42 ranges from 10 to 12 mm, and the diameter of the third micropore 43 ranges from 18 to 20 mm. In this embodiment, the diameter of the first micropore 41 is 8 mm, the diameter of the second micropore 42 is 12 mm, and the diameter of the third micropore 43 is 20 mm.
[0034] With this configuration, the slurry forms a weak jet shape after passing through the first micropore 41, and the flow rate of the paste is further reduced by the second micropore 42, which promotes the homogenization of the slurry; the third micropore 43 causes the slurry to flow out mainly in the form of overflow, and achieves large-area spreading by gravity.
[0035] The cone angle of the conical umbrella disc 40 ranges from 60° to 80°. In this embodiment, the cone angle of the conical umbrella disc 40 is 60°.
[0036] The self-cleaning device includes an annular air pipe 51 surrounding the pressure-stabilizing buffer cavity 30 and a plurality of nozzles 52 disposed on the annular air pipe 51, with the nozzles 52 facing the through hole.
[0037] In this embodiment, the annular air pipe 51 is a stainless steel annular air pipe, and the nozzles 52 are evenly arranged on the annular air pipe 51. The annular air pipe 51 is connected to the downhole compressed air system through pipelines and is controlled by an electromagnetic pulse valve. When pumping stops, the control system is automatically triggered to blow air at a pressure of 0.6-0.8 MPa for 15-30 seconds to thoroughly clean the through holes and prevent the through holes on the conical umbrella disc 40 from solidifying and becoming blocked after filling.
[0038] The principle of this utility model's umbrella-shaped diffusion pressure stabilizing device for mining filling paste is explained below:
[0039] Under the action of the rotary guide mechanism, the slurry in the filling pipe 10 changes from axial motion to rotational motion, converting linear kinetic energy into rotational kinetic energy, effectively weakening the axial impact force. Subsequently, the slurry enters the pressure-stabilizing buffer chamber 30, where the kinetic energy of the slurry is further reduced, decreasing the impact on the original pipeline and the sway amplitude at the end outlet. The through-holes on the conical umbrella disc 40 further reduce the slurry flow rate. Finally, the self-cleaning device cleans the through-holes in a timely manner, preventing the through-holes from solidifying and becoming blocked.
[0040] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A mine filling paste umbrella-shaped diffusion pressure stabilizing device, characterized in that, The device includes a rotating guide mechanism arranged sequentially along the slurry flow direction, a pressure-stabilizing buffer cavity connected to the outlet end of a filling pipe, a conical umbrella-shaped disc connected to the outlet end of the pressure-stabilizing buffer cavity, and a self-cleaning device surrounding the outer periphery of the pressure-stabilizing buffer cavity. The rotating guide mechanism includes a rotatable annular bearing disposed on the inner wall of the filling pipe and several guide vanes disposed on the rotatable annular bearing. The pressure-stabilizing buffer cavity is a cylindrical pipe section with a diameter larger than that of the filling pipe. Several through holes are provided on the conical umbrella-shaped disc. The self-cleaning device includes an annular air pipe surrounding the outer periphery of the pressure-stabilizing buffer cavity and several nozzles disposed on the annular air pipe, with the nozzles facing the through holes. The annular air pipe is connected to a compressed air source through a pipeline.
2. The mine filling paste umbrella-shaped diffusion pressure stabilizing device according to claim 1, characterized in that, The inclination angle of the guide vanes is 15°-18°.
3. The mine filling paste umbrella-shaped diffusion pressure stabilizing device according to claim 1, characterized in that, The through-hole includes at least one first micro-hole disposed in the top central region of the conical umbrella disk, a plurality of second micro-holes disposed in the middle annular region of the conical umbrella disk, and a plurality of third micro-holes disposed in the edge annular region of the conical umbrella disk.
4. The mine filling paste umbrella-shaped diffusion pressure stabilizing device according to claim 3, characterized in that, The diameter of the first micropore is smaller than the diameter of the second micropore, and the diameter of the second micropore is smaller than the diameter of the third micropore.
5. The mine filling paste umbrella-shaped diffusion pressure stabilizing device according to claim 4, characterized in that, The diameter of the first micropore ranges from 6 to 8 mm, the diameter of the second micropore ranges from 10 to 12 mm, and the diameter of the third micropore ranges from 18 to 20 mm.
6. The mine filling paste umbrella-shaped diffusion pressure stabilizing device according to claim 1, characterized in that, Several of the guide vanes are circumferentially distributed on the rotatable annular bearing.
7. The mine filling paste umbrella-shaped diffusion pressure stabilizing device according to claim 1, characterized in that, The number of guide vanes is 6-8.
8. The mine filling paste umbrella-shaped diffusion pressure stabilizing device according to claim 1, characterized in that, The rotating guide mechanism is positioned 1-2 meters away from the outlet of the filling pipe.
9. The mine filling paste umbrella-shaped diffusion pressure stabilizing device according to claim 1, characterized in that, The cone angle of the conical umbrella disc is 60°-80°.
10. The mine filling paste umbrella-shaped diffusion pressure stabilizing device according to claim 1, characterized in that, The annular air tube is a stainless steel annular air tube, and the nozzles are evenly arranged on the annular air tube.