Coal mine underground grouting device

Abstract

The utility model provides a coal mine underground grouting device, which relates to the technical field of grouting and comprises a stirring box, a feeding hopper is arranged at the top of the stirring box, a stirring assembly is arranged in the stirring box, a slurry collecting box is arranged below the stirring box, a slurry discharging pipe is connected between the stirring box and the slurry collecting box, a slurry discharging valve is arranged on the slurry discharging pipe, and a grouting pipe is connected to the bottom of the slurry collecting box. A grouting pump is arranged on the grouting pipe, a slurry crushing assembly and an inclined filter screen are sequentially arranged in the slurry collecting box from top to bottom, an auger conveyor is arranged on one side of the slurry collecting box, a feeding hopper of the auger conveyor is connected with the slurry collecting box and located at the lower end of the inclined filter screen, and a discharging port of the auger conveyor is connected with the upper portion of the stirring box. After slurry prepared by the stirring box flows into the slurry collecting box through the slurry discharging pipe, the slurry crushing assembly crushes large particles, and the inclined filter screen screens and intercepts impurities, so that the situation that the grouting pipe is blocked by the large particles is avoided, the grouting smoothness is improved, the grouting failure risk is reduced, and coal mine safety is guaranteed.

Description

Technical Field

[0001] This application relates to the field of grouting technology, and more specifically, to a coal mine underground grouting device. Background Technology

[0002] During the mining process, the rock strata underground in coal mines develop numerous fissures and pores due to mining activities. Grouting devices can inject grout into these fissures and pores, making the rock strata more compact. For example, during coal roadway excavation, grouting to reinforce the roof and sidewalls can effectively prevent roof collapse and sidewall spalling, thus improving the stability of the roadway.

[0003] However, when existing grouting equipment is in use, the slurry produced during the mixing stage inevitably contains some large-volume raw materials. In the subsequent grouting process, these raw materials are very likely to accumulate inside the grouting pipe, causing pipe blockage. This seriously hinders the smooth progress of grouting work, greatly affects the efficiency and quality of grouting operations, and poses a potential threat to coal mine production safety and the progress of related projects. Summary of the Invention

[0004] The purpose of this application is to provide a coal mine underground grouting device that can solve the technical problem that the grouting material produced by existing grouting devices contains large volume raw materials, which are easy to accumulate in the grouting pipe and cause blockage, hindering the grouting process and affecting the efficiency, quality, coal mine production safety and project progress.

[0005] This application provides a coal mine underground grouting device, including a mixing box, a feed hopper at the top of the mixing box, a mixing assembly inside the mixing box, a slurry collection box below the mixing box, a slurry discharge pipe connected between the mixing box and the slurry collection box, a slurry discharge valve on the slurry discharge pipe, a grouting pipe connected to the bottom of the slurry collection box, a grouting pump on the grouting pipe, a slurry crushing assembly and an inclined filter screen arranged sequentially from top to bottom inside the slurry collection box, a screw conveyor on one side of the slurry collection box, the inlet of the screw conveyor connected to the slurry collection box and located at the lower end of the inclined filter screen, and the outlet of the screw conveyor connected to the upper part of the mixing box.

[0006] Furthermore, the stirring assembly includes a stirring motor fixed on the stirring tank, a stirring shaft rotatably disposed inside the stirring tank, and a plurality of stirring rods uniformly fixed on the stirring shaft, one end of the stirring shaft extending outside the stirring tank and connected to the output shaft of the stirring motor.

[0007] Furthermore, the slurry crushing assembly includes a crushing motor fixed on the slurry collection box, a rotating shaft rotatably disposed inside the slurry collection box, a fixed shaft fixed inside the slurry collection box and disposed opposite to the rotating shaft, a first crushing roller fixed on the rotating shaft, and a second crushing roller fixed on the fixed shaft. One end of the rotating shaft extends outside the slurry collection box and is connected to the output shaft of the crushing motor.

[0008] Furthermore, the top of the slurry collection box is provided with a first inspection port.

[0009] Furthermore, a support frame is fixedly provided at the bottom of the mixing tank, and the slurry collection tank, the screw conveyor and the grouting pump are all fixedly provided on the support frame.

[0010] Furthermore, multiple rotating wheels are evenly arranged on the stirring rod.

[0011] Furthermore, a transition box is provided at the connection between the feed inlet of the auger conveyor and the slurry collection box, and a second inspection port is provided on the top of the transition box.

[0012] The beneficial effects of this utility model are:

[0013] This invention features a slurry crushing component and an inclined filter screen arranged sequentially from top to bottom inside the slurry collection tank. The slurry produced in the mixing tank enters the slurry collection tank through the slurry pipe. The slurry crushing component can crush and refine larger particles in the slurry, while the inclined filter screen screens the crushed slurry, intercepting incompletely crushed or newly generated impurities. This ensures that the slurry flowing into the grouting pipe is pure and fine, preventing larger particles in the slurry from entering the grouting pipe and causing blockages. This improves the smoothness and durability of grouting operations, reduces the risk of grouting failure due to slurry quality problems, and ensures safe production in coal mines. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 These are schematic diagrams of structures in some embodiments of this application;

[0016] Figure 2 These are cross-sectional views of some embodiments of this application;

[0017] Figure 3 for Figure 2 Cross-sectional view at the AA axis;

[0018] The reference numerals in the attached figures are as follows:

[0019] 1. Mixing tank; 2. Feed hopper; 3. Mixing assembly; 31. Mixing motor; 32. Mixing shaft; 33. Mixing rod; 331. Rotary wheel; 4. Slurry collection box; 5. Slurry discharge pipe; 6. Slurry discharge valve; 7. Grouting pipe; 8. Grouting pump; 9. Slurry crushing assembly; 91. Crushing motor; 92. Rotary shaft; 93. Fixed shaft; 94. First crushing roller; 95. Second crushing roller; 10. Inclined filter screen; 11. Screw conveyor; 12. First inspection port; 13. Support frame; 14. Transition box; 15. Second maintenance port. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Specific implementation examples:

[0027] like Figure 1-3 As shown, this application provides a grouting device for underground coal mines, including a mixing tank 1, a feed hopper 2 at the top of the mixing tank 1, a mixing assembly 3 inside the mixing tank 1, a slurry collection tank 4 below the mixing tank 1, a slurry discharge pipe 5 connecting the mixing tank 1 and the slurry collection tank 4, a slurry discharge valve 6 on the slurry discharge pipe 5, a grouting pipe 7 connected to the bottom of the slurry collection tank 4, a grouting pump 8 on the grouting pipe 7, and a slurry crushing assembly 9 and an inclined filter screen 10 arranged sequentially from top to bottom inside the slurry collection tank 4. A screw conveyor 11 (existing technology, not described in detail here) is provided on one side of the slurry tank 4. The inlet of the screw conveyor 11 is connected to the slurry collection tank 4 and located at the lower end of the inclined filter screen 10. The outlet of the screw conveyor 11 is connected to the upper part of the mixing tank 1. In use, the required grouting material is added from the feed hopper 2 at the top of the mixing tank 1. The mixing component 3 inside the mixing tank 1 fully mixes the material to form a slurry. The slurry is controlled by the slurry pipe 5 (the slurry valve 6 controls the flow). The slurry flows into the slurry collection tank 4. Inside the slurry collection tank 4, the slurry crushing component 9 first crushes and refines any large particles or unevenly mixed materials. Then, it passes through the inclined filter screen 10 to filter impurities, resulting in a relatively pure and fine slurry. The grouting pipe 7 at the bottom of the slurry collection tank 4, under the action of the grouting pump 8, transports the qualified slurry to the underground grouting site. Meanwhile, the auger conveyor 11 on one side of the slurry collection tank 4 sends the impurities or large particles intercepted by the filter screen back to the mixing tank 1 for reprocessing. This cycle ensures the continuous operation of the grouting. The slurry crushing component 9 can crush and refine larger particles in the slurry, while the inclined filter screen 10 screens the crushed slurry, intercepting incompletely crushed or newly generated impurities. This ensures that the slurry flowing into the grouting pipe 7 is pure and fine, preventing larger particles in the slurry from entering the grouting pipe 7 and causing blockages. This improves the smoothness and durability of the grouting operation, reduces the risk of grouting failure due to slurry quality problems, and ensures safe production in the coal mine.

[0028] like Figure 2As shown, the mixing assembly 3 includes a mixing motor 31 fixed on the mixing tank 1, a mixing shaft 32 rotatably disposed inside the mixing tank 1, and a plurality of mixing rods 33 uniformly fixed on the mixing shaft 32. One end of the mixing shaft 32 extends to the outside of the mixing tank 1 and is connected to the output shaft of the mixing motor 31. The mixing motor 31 drives the mixing shaft 32 to rotate, and the mixing shaft 32 drives the mixing rods 33 to rotate, thereby mixing the grouting material in the mixing tank 1 to form a slurry.

[0029] like Figure 2 and Figure 3 As shown, the slurry crushing assembly 9 includes a crushing motor 91 fixed on the slurry collection box 4, a rotating shaft 92 rotatably disposed inside the slurry collection box 4, a fixed shaft 93 fixed inside the slurry collection box 4 and disposed opposite to the rotating shaft 92, a first crushing roller 94 fixed on the rotating shaft 92, and a second crushing roller 95 fixed on the fixed shaft 93. One end of the rotating shaft 92 extends to the outside of the slurry collection box 4 and is connected to the output shaft of the crushing motor 91. The crushing motor 91 drives the rotating shaft 92 to rotate, and the rotating shaft 92 drives the first crushing roller 94 to rotate. Together with the second crushing roller 95 fixed on the fixed shaft 93, a strong shearing and squeezing force is formed to crush and refine the slurry falling from the lower slurry pipe 5.

[0030] like Figure 2 As shown, the top of the slurry collection box 4 is equipped with a first inspection port 12. Operators can easily observe the liquid level, color, uniformity, and other status information of the slurry in the slurry collection box 4 through the first inspection port 12. For example, during the grouting process, they can check in real time whether there is stratification, sedimentation, or abnormal impurities in the slurry, and keep abreast of the dynamic quality of the slurry so as to make corresponding adjustments to the grouting operation. If an abnormal color of the slurry is found, it may mean that there is a problem with the raw material ratio. If sedimentation is observed, stirring or other treatment measures can be taken in time to ensure that the quality of the slurry injected into the well is stable and reliable. In addition, after the grouting is completed, the inside of the slurry collection box 4 can be rinsed with a water gun through the first inspection port 12.

[0031] like Figure 1-3 As shown, a support frame 13 is fixedly installed at the bottom of the mixing tank 1. The slurry collection tank 4, the screw conveyor 11 and the grouting pump 8 are all fixedly installed on the support frame 13. The support frame 13 at the bottom of the mixing tank 1 provides a stable support for the slurry collection tank 4, the screw conveyor 11 and the grouting pump 8. The layout of the mixing tank 1, the slurry collection tank 4, the screw conveyor 11 and the grouting pump 8 is reasonable, reducing the space occupied by each piece of equipment.

[0032] like Figure 2As shown, multiple rotating wheels 331 are uniformly arranged on the stirring rod 33. The rotating wheels 331 can generate additional stirring force during the stirring process. When the stirring rod 33 rotates around the stirring shaft 32, the rotating wheels 331 also rotate. The rotation of the rotating wheels 331 will form local small eddies in the slurry, so that the raw materials near the stirring rod 33 are more fully mixed.

[0033] like Figure 1-3 As shown, a transition box 14 is provided at the connection between the feed inlet of the auger conveyor 11 and the slurry collection box 4. A second inspection port 15 is provided on the top of the transition box 14. Through the second inspection port 15, the staff can periodically check the material condition in the transition box 14. The setting of the transition box 14 plays a certain buffering role. When the slurry in the collection box 4 enters the auger conveyor 11 after passing through the inclined filter screen 10, it may generate a large impact force due to factors such as drop. The transition box 14 can slow down the falling speed of this part of the slurry, so that the slurry enters the auger conveyor 11 in a more stable state, reducing the impact of the slurry on the feed hopper 2 and the spiral blades of the auger conveyor 11, and extending the service life of the auger conveyor 11.

[0034] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A coal mine underground grouting device, characterized in that: The utility model provides a slurry mixing device, which comprises a stirring box, a feeding hopper arranged on the top of the stirring box, a stirring assembly arranged in the stirring box, a slurry collecting box arranged below the stirring box, a slurry pipe connected between the stirring box and the slurry collecting box, a slurry valve arranged on the slurry pipe, a grouting pipe connected to the bottom of the slurry collecting box, a grouting pump arranged on the grouting pipe, a slurry crushing assembly and an inclined filter screen arranged in the slurry collecting box from top to bottom, a screw conveyor arranged on one side of the slurry collecting box, and a feeding port of the screw conveyor connected to the slurry collecting box and located at the lower end of the inclined filter screen.

2. The coal mine underground grouting device according to claim 1, characterized in that: The stirring assembly comprises a stirring motor fixed on the stirring box, a stirring shaft rotatably arranged in the stirring box, and a plurality of stirring rods uniformly fixed on the stirring shaft, one end of the stirring shaft extending out of the stirring box and connected to an output shaft of the stirring motor.

3. The coal mine underground grouting device according to claim 1, characterized in that: The slurry crushing assembly comprises a crushing motor fixed on the slurry collecting box, a rotating shaft rotatably arranged in the slurry collecting box, a fixed shaft fixed in the slurry collecting box and arranged opposite to the rotating shaft, a first crushing roller fixed on the rotating shaft, and a second crushing roller fixed on the fixed shaft, one end of the rotating shaft extending out of the slurry collecting box and connected to an output shaft of the crushing motor.

4. The coal mine underground grouting device according to claim 1, characterized in that: The top of the slurry collecting box is provided with a first inspection opening.

5. The coal mine underground grouting device according to claim 1, characterized in that: The bottom of the stirring box is fixedly provided with a support frame, and the slurry collecting box, the screw conveyor, and the grouting pump are all fixedly arranged on the support frame.

6. The coal mine underground grouting device according to claim 2, characterized in that: A plurality of rotating wheels are uniformly rotatably arranged on the stirring rods.

7. The coal mine underground grouting device according to claim 1, characterized in that: The feeding port of the screw conveyor is provided with a transition box connected to the slurry collecting box, and the top of the transition box is provided with a second inspection opening.

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