An overburden separation grouting device for coal mining

Abstract

The utility model relates to the technical field of coal mining, concretely to an overburden separation layer grouting device for coal mining, which comprises a base, a mixing box fixedly installed at the upper end of the base, a feed inlet formed at the upper end of the mixing box, a discharge outlet formed at the lower end of the mixing box, and a mixing assembly installed inside the mixing box; a first connecting pipe, which is sealingly connected at the discharge outlet of the lower end of the mixing box, has a connecting piece sealingly connected at the end away from the discharge outlet, has a cavity inside the connecting piece, and has a filtering assembly installed inside the connecting piece; a second connecting pipe, which is sealingly connected at the end of the connecting piece away from the first connecting pipe, has a grouting head detachably installed at the end of the second connecting pipe; and a limiting assembly for clamping the second connecting pipe is installed at the side end of the second connecting pipe at the lower end of the base.

Description

Technical Field

[0001] This utility model relates to the field of coal mining technology, specifically to a grouting device for overburden separation in coal mining. Background Technology

[0002] Overburden delamination is a common geological phenomenon in coal mining. If not addressed promptly, it can lead to safety accidents such as roof subsidence and collapse. Grouting is an effective method for treating overburden delamination. By injecting grout into the delamination area, the space can be filled, improving the stability of the rock strata.

[0003] Currently, existing grouting devices for overburden separation in coal mines have several shortcomings. Among these, the stability of the grouting pipes is particularly prominent. Existing grouting devices often lack effective fixing mechanisms for the grouting pipes. During grouting, the impact force generated by the grout flow and the influence of the external environment easily cause the grouting pipes to shake. This shaking not only leads to instability in the position of the grouting head, affecting the accuracy of grouting and preventing the grout from being accurately injected into the target location of the overburden separation, thus reducing the grouting effect, but also, with prolonged shaking, can cause loosening at pipe connections, resulting in grout leakage, wasting materials, and potentially creating safety hazards. Furthermore, different grouting operation scenarios may require grouting pipes of different diameters, and most existing fixing mechanisms cannot be adjusted according to the pipe diameter, resulting in poor versatility and causing numerous inconveniences in actual operations.

[0004] To address the aforementioned problems, this utility model provides a grouting device for overburden separation in coal mining, which can effectively solve the defects existing in the prior art. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a grouting device for overburden separation in coal mining.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A grouting device for overburden separation in coal mining, comprising:

[0008] A base, on which a mixing tank is fixedly installed, has a feed inlet at the upper end and a discharge outlet at the lower end, and a mixing assembly is installed inside the mixing tank;

[0009] The first connecting pipe is sealed to the discharge port at the lower end of the mixing tank. The end of the first connecting pipe away from the discharge port is sealed to a connector. The connector has a cavity inside and a filter assembly is installed inside the connector.

[0010] The second connecting pipe is sealed to the end of the connector away from the first connecting pipe, and a grouting head is detachably installed at the end of the second connecting pipe; a limiting component for clamping the second connecting pipe is installed at the lower end of the base located on the side of the second connecting pipe.

[0011] Furthermore, the stirring assembly includes a stirring motor, a stirring shaft, and stirring blades. The stirring motor is installed at the upper end of the stirring tank. One end of the stirring shaft is fixedly connected to the output shaft of the stirring motor. The other end of the stirring motor passes through the upper cover of the stirring tank and is located inside the stirring tank. There are multiple stirring blades, all of which are installed on the side end of the stirring shaft.

[0012] Furthermore, a scraper is connected to the end of the stirring blade away from the stirring shaft, and the scraper is in contact with the inner wall of the mixing tank.

[0013] Furthermore, the connector has a groove for inserting the filter assembly, and sliding grooves are provided on both sides of the groove. The filter assembly includes a filter frame, a filter screen, a slider, and a handle. The filter screen is fixedly installed on the inner side of the filter frame, the slider is fixedly installed on both sides of the filter frame, the slider is adapted to the sliding groove, and the handle is fixedly installed on the upper end of the filter frame.

[0014] Furthermore, the limiting components are in two sets, both sets of the limiting components are installed at the lower end of the base and respectively at both ends of the second connecting pipe. The limiting components include a mounting block, a telescopic component and a clamping plate. The mounting block is fixedly installed at the lower end of the base, the telescopic component is fixedly installed at the side end of the mounting block, and the clamping plate is fixedly installed on the side of the telescopic component away from the mounting block, and the side end of the clamping plate cooperates with the second connecting pipe.

[0015] Furthermore, the telescopic assembly includes a first telescopic rod, a second telescopic rod, and a telescopic spring. The first telescopic rod is fixedly installed on the side end of the mounting block. The second telescopic rod is sleeved with the first telescopic rod, and the end of the second telescopic rod away from the first telescopic rod is fixedly connected to the clamping plate. The telescopic spring is installed inside the first telescopic rod and the second telescopic rod. One end of the telescopic spring is fixedly connected to the side end of the mounting block, and the other end of the telescopic spring is fixedly connected to the side end of the clamping plate.

[0016] Furthermore, a first solenoid valve is installed at the connection between the first connecting pipe and the discharge port of the mixing tank, and a second solenoid valve is installed at the connection between the second connecting pipe and the grouting head.

[0017] Furthermore, four support columns are fixedly installed at the lower end of the base, and each support column is fixedly installed with a self-locking caster wheel at its lower end.

[0018] The explanations of the nouns, conjunctions, or adjectives used in the above technical solutions are as follows:

[0019] Fixed connection: refers to a connection in which parts or components are fixed in place and there is no relative movement. It is divided into two types: detachable connection and non-detachable connection.

[0020] (1) Detachable connection: The components are fixed together using screws, splines, wedges, etc. This type of connection can be disassembled during maintenance without damaging the parts. However, the specifications of the connecting parts used must be correct (such as the length of the bolts, keys, wedges) and properly tightened.

[0021] (2) Non-removable connections: These mainly refer to welding, riveting, and tenon joints. Since disassembly requires forging, sawing, or oxyacetylene cutting for repair or replacement, the parts generally cannot be reused. At the same time, attention should be paid to process quality, technical inspection, and remedial measures (such as correction and polishing) during connection.

[0022] The beneficial effects of this utility model are:

[0023] 1. This device uses a stirring motor in the stirring assembly to drive the stirring shaft and multiple stirring blades to rotate, which can fully mix the grouting material, ensure the uniformity of the grout, and thus improve the grouting effect. At the same time, the scrapers on the stirring blades are in contact with the inner wall of the mixing tank, which can scrape off the grout adhering to the inner wall, avoid material waste, and facilitate cleaning of the mixing tank.

[0024] 2. This device uses a filter assembly within the connector to filter impurities in the grout, preventing them from clogging the grouting pipes and grouting heads, thus ensuring smooth grouting operations. Furthermore, the filter assembly engages with the sliding groove of the connector via a slider, and can be easily pulled out using a handle for convenient cleaning or replacement of the filter screen, making operation simple and convenient.

[0025] 3. In this device, two sets of limiting components clamp and fix the second connecting pipe from both ends. The telescopic component can adaptively adjust according to the pipe diameter, so that the clamping plate fits the pipe tightly, effectively preventing the pipe from shaking during grouting, improving the stability of the device, and ensuring the accuracy of grouting. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall device according to an embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional view of the overall device according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the stirring assembly according to an embodiment of the present invention;

[0030] Figure 4 This is a structural schematic diagram of the connector according to an embodiment of the present utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the filter assembly according to an embodiment of the present invention;

[0032] Figure 6 This is a cross-sectional view of the limiting component according to an embodiment of the present invention.

[0033] Reference numerals: 1. Base; 2. Mixing tank; 3. Inlet; 4. Outlet; 5. Mixing assembly; 6. First connecting pipe; 7. Connector; 8. Filter assembly; 9. Second connecting pipe; 10. Grouting head; 11. Limiting assembly; 12. Mixing motor; 13. Mixing blade; 14. Mixing shaft; 15. Scraper; 16. Groove; 17. Slide groove; 18. Filter frame; 19. Filter screen; 20. Slider; 21. Handle; 22. Mounting block; 23. Telescopic assembly; 24. Clamping plate; 25. First telescopic rod; 26. Second telescopic rod; 27. Telescopic spring; 28. First solenoid valve; 29. ​​Second solenoid valve; 30. Support column; 31. Self-locking caster wheel. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0035] A grouting device for overburden separation in coal mining, such as Figures 1-6 As shown, it includes:

[0036] A base 1, a mixing tank 2 is fixedly installed on the upper end of the base 1, a feed inlet 3 is opened on the upper end of the mixing tank 2, a discharge outlet 4 is opened on the lower end of the mixing tank 2, and a mixing assembly 5 is installed inside the mixing tank 2;

[0037] The first connecting pipe 6 is sealed to the discharge port 4 at the lower end of the mixing tank 2. The end of the first connecting pipe 6 away from the discharge port 4 is sealed to a connector 7. The connector 7 has a cavity inside and a filter assembly 8 is installed inside the connector 7.

[0038] The second connecting pipe 9 is sealed to the end of the connector 7 away from the first connecting pipe 6, and the end of the second connecting pipe 9 is detachably equipped with a grouting head 10; the lower end of the base 1 is equipped with a limiting component 11 for clamping the second connecting pipe 9 at the side end of the second connecting pipe 9.

[0039] This device integrates mixing, filtering, and grouting functions into a single unit via the base 1. The orderly connection of each component reduces the operational complexity caused by scattered equipment, making the grouting process more seamless and improving overall operational efficiency. The sealed connection between the first connecting pipe 6 and the discharge port 4 of the mixing tank 2, and the sealing connection between the second connecting pipe 9 and the connecting piece 7, effectively prevents grout leakage during transmission, avoids material waste, and maintains a clean working environment. The grouting head 10 is detachable, making it easy to replace when worn or required for different grouting needs. The filter assembly 8 is installed inside the connecting piece 7, facilitating regular removal for cleaning or replacement, ensuring filtration effectiveness, reducing equipment damage caused by impurities, and extending the device's service life. The limiting assembly 11 at the lower end of the base 1 clamps the second connecting pipe 9, effectively limiting its displacement and shaking during grouting, ensuring the stability of the grouting head 10, improving grouting accuracy, and guaranteeing the quality of overburden separation grouting.

[0040] In a preferred embodiment of this invention, the mixing assembly 5 includes a mixing motor 12, a mixing shaft 14, and mixing blades 13. The mixing motor 12 is mounted on the upper end of the mixing tank 2. One end of the mixing shaft 14 is fixedly connected to the output shaft of the mixing motor 12, and the other end of the mixing motor 12 passes through the upper cover of the mixing tank 2 and is located inside the mixing tank 2. Multiple mixing blades 13 are mounted on the side of the mixing shaft 14. By driving the mixing shaft 14 and mixing blades 13 to rotate, the mixing motor 12 can fully mix the grouting material in the mixing tank 2, ensuring the uniformity of the grout.

[0041] In a preferred embodiment of this invention, a scraper 15 is connected to the end of the stirring blade 13 away from the stirring shaft 14, and the scraper 15 is in contact with the inner wall of the mixing tank 2. The scraper 15 can scrape off the slurry adhering to the inner wall of the mixing tank 2 during the stirring process, avoiding material waste and facilitating the cleaning of the mixing tank 2.

[0042] In a preferred embodiment of this utility model, the connector 7 has a groove 16 for easy insertion of the filter assembly 8. Sliding grooves 17 are provided on both sides of the groove 16. The filter assembly 8 includes a filter frame 18, a filter screen 19, a slider 20, and a handle 21. The filter screen 19 is fixedly installed inside the filter frame 18, and the slider 20 is fixedly installed on both sides of the filter frame 18, adapting to the sliding grooves 17. The handle 21 is fixedly installed on the upper end of the filter frame 18. The filter assembly 8 can filter the stirred slurry, removing impurities and preventing them from clogging the grouting pipe and grouting head 10. The filter frame 18 can be pulled out of the groove 16 using the handle 21, facilitating cleaning or replacement of the filter screen 19. The operation is simple and convenient.

[0043] In a preferred embodiment of this utility model, the limiting components 11 consist of two sets. Both sets of limiting components 11 are installed at the lower end of the base 1 and at both ends of the second connecting pipe 9. Each limiting component 11 includes a mounting block 22, a telescopic component 23, and a clamping plate 24. The mounting block 22 is fixedly installed at the lower end of the base 1, the telescopic component 23 is fixedly installed on the side of the mounting block 22, and the clamping plate 24 is fixedly installed on the side of the telescopic component 23 away from the mounting block 22, with the side end of the clamping plate 24 engaging with the second connecting pipe 9. The two sets of limiting components 11 can clamp and fix the second connecting pipe 9 from both ends, improving the stability of the second connecting pipe 9 during grouting and preventing it from shaking and affecting the grouting effect.

[0044] In a preferred embodiment of this invention, the telescopic assembly 23 includes a first telescopic rod 25, a second telescopic rod 26, and a telescopic spring 27. The first telescopic rod 25 is fixedly installed on the side of the mounting block 22. The second telescopic rod 26 is sleeved with the first telescopic rod 25, and the end of the second telescopic rod 26 away from the first telescopic rod 25 is fixedly connected to the clamping plate 24. The telescopic spring 27 is installed inside the first telescopic rod 25 and the second telescopic rod 26. One end of the telescopic spring 27 is fixedly connected to the side of the mounting block 22, and the other end of the telescopic spring 27 is fixedly connected to the side of the clamping plate 24. The telescopic assembly 23 can adaptively adjust according to the diameter of the second connecting pipe 9, so that the clamping plate 24 can tightly fit the second connecting pipe 9, ensuring the clamping effect.

[0045] In a preferred embodiment of this utility model, a first solenoid valve 28 is installed at the connection between the first connecting pipe 6 and the discharge port 4 of the mixing tank 2, and a second solenoid valve 29 is installed at the connection between the second connecting pipe 9 and the grouting head 10. The first solenoid valve 28 and the second solenoid valve 29 are used to control the opening and closing of the first connecting pipe 6 and the second connecting pipe 9, respectively, to facilitate the control of the grouting operation.

[0046] In a preferred embodiment of this utility model, four support columns 30 are fixedly installed at the lower end of the base 1, and a self-locking caster wheel 31 is fixedly installed at the lower end of each support column 30. The self-locking caster wheel 31 facilitates the movement and fixation of the device, improving the flexibility and ease of use of the device.

[0047] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims of this utility model.

Claims

1. A grouting device for overburden separation in coal mining, characterized in that, include: A base (1) is provided, and a mixing box (2) is fixedly installed on the upper end of the base (1). A feed inlet (3) is provided on the upper end of the mixing box (2), and a discharge outlet (4) is provided on the lower end of the mixing box (2). A mixing assembly (5) is installed inside the mixing box (2). The first connecting pipe (6) is sealed and connected to the discharge port (4) at the lower end of the mixing tank (2). The end of the first connecting pipe (6) away from the discharge port (4) is sealed and connected to a connector (7). The connector (7) has a cavity inside and a filter assembly (8) is installed inside the connector (7). The second connecting pipe (9) is sealed to the end of the connector (7) away from the first connecting pipe (6), and the end of the second connecting pipe (9) is detachably equipped with a grouting head (10); the lower end of the base (1) is equipped with a limiting component (11) for clamping the second connecting pipe (9) on the side of the second connecting pipe (9).

2. The overburden separation grouting device for coal mining according to claim 1, characterized in that, The stirring assembly (5) includes a stirring motor (12), a stirring shaft (14), and stirring blades (13). The stirring motor (12) is installed on the upper end of the stirring box (2). One end of the stirring shaft (14) is fixedly connected to the output shaft of the stirring motor (12). The other end of the stirring motor (12) passes through the upper cover of the stirring box (2) and is located inside the stirring box (2). There are multiple stirring blades (13), all of which are installed on the side of the stirring shaft (14).

3. A grouting device for overburden separation in coal mining according to claim 2, characterized in that, The end of the stirring blade (13) away from the stirring shaft (14) is connected to a scraper (15), and the scraper (15) is in contact with the inner wall of the mixing tank (2).

4. A grouting device for overburden separation in coal mining according to claim 1, characterized in that, The connector (7) has a groove (16) for inserting the filter assembly (8). The groove (16) has a sliding groove (17) on both sides. The filter assembly (8) includes a filter frame (18), a filter screen (19), a slider (20), and a handle (21). The filter screen (19) is fixedly installed on the inside of the filter frame (18). The slider (20) is fixedly installed on both sides of the filter frame (18). The slider (20) is adapted to the sliding groove (17). The handle (21) is fixedly installed on the upper end of the filter frame (18).

5. A grouting device for overburden separation in coal mining according to claim 1, characterized in that, The limiting components (11) are in two sets. Both sets of limiting components (11) are installed at the lower end of the base (1) and at both ends of the second connecting pipe (9). The limiting components (11) include a mounting block (22), a telescopic component (23) and a clamping plate (24). The mounting block (22) is fixedly installed at the lower end of the base (1). The telescopic component (23) is fixedly installed at the side end of the mounting block (22). The clamping plate (24) is fixedly installed on the side of the telescopic component (23) away from the mounting block (22), and the side end of the clamping plate (24) cooperates with the second connecting pipe (9).

6. A grouting device for overburden separation in coal mining according to claim 5, characterized in that, The telescopic assembly (23) includes a first telescopic rod (25), a second telescopic rod (26), and a telescopic spring (27). The first telescopic rod (25) is fixedly installed on the side of the mounting block (22). The second telescopic rod (26) is sleeved with the first telescopic rod (25), and the end of the second telescopic rod (26) away from the first telescopic rod (25) is fixedly connected to the clamping plate (24). The telescopic spring (27) is installed inside the first telescopic rod (25) and the second telescopic rod (26). One end of the telescopic spring (27) is fixedly connected to the side of the mounting block (22), and the other end of the telescopic spring (27) is fixedly connected to the side of the clamping plate (24).

7. A grouting device for overburden separation in coal mining according to claim 1, characterized in that, A first solenoid valve (28) is installed at the connection between the first connecting pipe (6) and the discharge port (4) of the mixing tank (2), and a second solenoid valve (29) is installed at the connection between the second connecting pipe (9) and the grouting head (10).

8. A grouting device for overburden separation in coal mining according to claim 1, characterized in that, The lower end of the base (1) is fixedly equipped with four support columns (30), and each support column (30) is fixedly equipped with a self-locking caster wheel (31) at its lower end.

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