Coal mine goaf grouting filling construction equipment and use method

Abstract

The application discloses a kind of coal mine goaf grouting filling construction equipment and use method, including installation support and material preparation tank, the material preparation tank is fixedly arranged in the top of installation support by support, the top of installation support is fixedly connected with driving motor;By having pressure material mechanism, automatic screening mechanism and material removal mechanism between installation support and material preparation tank, so that the device can reciprocatingly press the inner wall higher than liquid level during preparing slurry, so as to re-inject the slurry splashed at high place into the inside of liquid level, avoid the problem that the inner wall at high place is easy to produce fouling due to the solidification of splashed material, and simultaneously screen the uniformization of feedstock, remove larger materials, to ensure the quality of slurry output, and simultaneously remove the large block material removed, to avoid its accumulation in screening mechanism, and affect the screening effect.

Description

Technical Field

[0001] This invention relates to the field of coal mine backfilling technology, specifically to a coal mine goaf grouting and filling construction equipment and its usage method. Background Technology

[0002] Goaf grouting is an effective method for managing mining areas, effectively stabilizing underground rock strata and preventing ground subsidence. A goaf in a coal mine specifically refers to the cavity or void formed after coal and rock are extracted during underground operations. Goafs contain large amounts of loose coal, which is prone to spontaneous combustion and fires. Underground voids can cause surface subsidence, damaging surface buildings. Fly ash, a waste product from thermal power plants, can be used as an active ingredient after adding activators. During the mixing of fly ash, cement, and water to prepare the grouting solution, the cement decomposes to release an activator called calcium hydroxide, forming a stable compound. Using fly ash and cement as raw materials for goaf grouting not only reduces construction costs but also avoids the impact of goafs on shaft construction.

[0003] In existing technologies, the use of grouting equipment is inevitable for grouting mined-out areas. Grouting equipment is mostly composed of a preparation mechanism and a conveying mechanism. Through rapid preparation and powerful conveying, the grout mixture can be easily injected into the designated mined-out area.

[0004] While existing technologies can conveniently obtain grouting materials and carry out construction through grouting equipment, they inevitably still have shortcomings in actual use. For example, the grouting equipment lacks a reciprocating pressing mechanism, which leads to the material splashing onto the inner wall above the liquid level of the mixture due to the lack of backfilling. Furthermore, the material dries prematurely, causing the inner wall of the equipment to easily form a solidified structure. To avoid such problems, a grouting and filling construction equipment and its usage method for coal mine goaf are proposed to solve the existing problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a grouting and filling construction equipment and method for coal mine goaf areas. It solves the problem that the lack of a reciprocating pressing mechanism in the grouting equipment leads to material splashing onto the inner wall at a high level during the grouting process, causing scaling on the inner wall due to pre-solidification of the material.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a coal mine goaf grouting and filling construction device, comprising an installation support and a material preparation tank. The material preparation tank is fixedly mounted on the top of the installation support via a bracket. A drive motor is fixedly connected to the top of the installation support, and the output shaft of the drive motor is fixedly connected to a stirring shaft assembly via a coupling. One end of the stirring shaft assembly penetrates and extends into the interior of the material preparation tank. A pressing mechanism is provided between the material preparation tank and the stirring shaft assembly. An automatic screening mechanism is provided between the stirring shaft assembly and the installation support, and located on top of the pressing mechanism. A discharge mechanism is provided between the automatic screening mechanism and the stirring shaft assembly.

[0007] Preferably, the pressing mechanism includes an electric telescopic rod, which is fixedly mounted on one side of the material preparation tank via a bracket. An installation sleeve is fixedly connected to the extended end of the electric telescopic rod via the bracket. A perforated convex plate is slidably mounted on the surface of the stirring shaft assembly, and the surface of the perforated convex plate is rotatably connected to the inner wall of the installation sleeve via a bearing. A scraper ring plate is mounted on the top of the installation sleeve. Ball bearings matching the perforated convex plate are fixedly connected to both sides of the bottom of the scraper ring plate. A first limiting sleeve is fixedly connected to the top of the installation sleeve via a bracket. A first limiting telescopic column is slidably connected inside the first limiting sleeve, and the bottom of the first limiting telescopic column is fixedly connected to the top of the scraper ring plate. A first return spring is fixedly connected between the first limiting telescopic column and the first limiting sleeve.

[0008] Preferably, the automatic screening mechanism includes two second limiting sleeves, each fixedly mounted on both sides of the material preparation tank via a bracket. A second limiting telescopic column is slidably connected inside each second limiting sleeve, and a second return spring is fixedly connected between the second limiting telescopic column and the second limiting sleeve. A conical bottom screen frame is rotatably mounted between the two second limiting telescopic columns. An inner conical material distribution frame, matching the conical bottom screen frame, is fixedly connected to the rear sides of both second limiting sleeves via a bracket. An installation ring is fixedly connected between the two second limiting sleeves. Arc-shaped protrusions are fixedly connected to both sides of the top of the installation ring. Guide rods matching the arc-shaped protrusions are rotatably connected to both sides of the conical bottom screen frame via bearings. L-shaped fixing sleeves are fixedly connected to the front and rear sides of the stirring shaft assembly. A supporting sliding column is slidably connected inside the L-shaped fixing sleeve, and the top of the supporting sliding column is fixedly connected to the bottom of the conical bottom screen frame.

[0009] Preferably, the material removal mechanism includes a foreign matter collection cylinder rotatably disposed inside a conical bottom screen frame. A rotating ring plate is fixedly connected to the bottom of the conical bottom screen frame. A rotating ring groove that slides and adapts to the rotating ring plate is opened at the top of the foreign matter collection cylinder. A protective ring plate is fixedly connected to the bottom of the conical bottom screen frame. A splash guard is fixedly connected to the bottom of the conical bottom screen frame and on the outer surface of the protective ring plate. A material conveying cylinder is fixedly connected to the inside of the foreign matter collection cylinder via a bracket. A material removal inclined pipe is connected to the rear side of the material conveying cylinder, and one end of the material removal inclined pipe passes through and extends to the rear side of the inner conical material distribution frame. A material driving roller is fixedly connected to the top of the stirring shaft assembly, and one end of the material driving roller passes through the foreign matter collection cylinder and extends into the inside of the material conveying cylinder. The through contact surface between the material driving roller and the foreign matter collection cylinder is rotatably connected via a bearing. A spiral conveying blade is fixedly connected to the surface of the material driving roller.

[0010] Preferably, a circular sliding frame is fixedly connected between the two second limiting telescopic columns, and an annular sliding plate is slidably connected inside the circular sliding frame, with the inner wall of the annular sliding plate fixedly connected to the outer wall of the cone bottom screen frame.

[0011] Preferably, the stirring shaft assembly has limit grooves on both sides, and limit blocks are slidably connected inside the limit grooves. The opposite sides of the two limit blocks are respectively fixedly connected to the two sides of the inner cavity of the perforated convex plate.

[0012] Preferably, a grouting pump is fixedly connected to the top of the mounting support, and the inlet end of the grouting pump is connected to the bottom of the material preparation tank through a pipeline.

[0013] Preferably, both the stirring shaft assembly and the supporting slide are fixedly connected to a conical shield.

[0014] This invention also discloses a method for grouting and filling coal mine goaf areas, specifically including the following steps:

[0015] S1. The aggregate is poured at a constant speed to the top of the inner conical distribution frame by the on-site lifting mechanism. The material is tilted and falls onto the inclined inner wall of the cone bottom screen frame by the tilting of the cone inside the cone bottom screen frame. The material rolls down and is screened by itself, so that the large aggregate is left in the cone bottom screen frame. After adding appropriate powder, water can be added and mixed.

[0016] S2. Start the drive motor. The drive motor starts its output shaft to drive the stirring shaft assembly to stir and prepare the mixture inside the material preparation tank. The rotation of the stirring shaft assembly will drive the perforated convex plate to rotate synchronously through the cooperation of its body limiting groove and limiting block. During the rotation of the perforated convex plate, the convex point on its top will continuously squeeze and lift the ball column. The reciprocating lifting of the ball column will drive the scraper ring plate to scrape up and down. The up and down scraping of the scraper ring plate can scrape and backfill the material splashed on the top of the inner wall.

[0017] S3. While the stirring shaft assembly drives the scraper ring plate to scrape the material back and forth, the stirring shaft assembly will also drive the L-shaped fixed sleeve to rotate. The rotation of the L-shaped fixed sleeve drives the support slide column to rotate, and the support slide column drives the cone bottom screen frame to rotate. The rotation of the cone bottom screen frame will promote the material to pass through the screen in multiple directions. The rotation of the cone bottom screen frame will drive the guide rod to rotate. During the rotation of the guide rod, it will repeatedly squeeze and contact the arc-shaped protrusion. Through contact, the guide rod will briefly drive the cone bottom screen frame to shake up and down. The reciprocating shaking of the cone bottom screen frame can vibrate the material. As the material vibrates and falls through the screen from top to bottom, the large pieces of aggregate will fall into the low-point foreign matter collection cylinder.

[0018] S4. The stirring shaft assembly drives the cone bottom screen frame to rotate and shake the screened material through the L-shaped fixed sleeve and support slide column. At the same time, the stirring shaft assembly also drives the material drive roller to rotate synchronously. The rotation of the material drive roller drives the spiral transmission blades. The rotation of the spiral transmission blades will continuously convey the large pieces of material accumulated inside the foreign matter collection cylinder upwards. After the material is conveyed upwards to a certain height, it will be discharged and removed through the discharge inclined pipe.

[0019] Preferably, a plurality of stirring rods are fixedly disposed on the surface of the stirring shaft assembly in S1.

[0020] This invention provides a grouting and filling construction device and method for coal mine goaf areas. Compared with existing technologies, it has the following advantages:

[0021] (1) The coal mine goaf grouting and filling construction equipment has a pressing mechanism, an automatic screening mechanism and a material removal mechanism between the installation support and the material preparation tank. During the preparation of slurry, the device can simultaneously press the inner wall above the liquid level, so that the slurry at the high splashing point can be re-poured into the liquid level, avoiding the problem of scale formation on the inner wall at the high point due to the solidification of the splashed material. It can also simultaneously screen the feed raw materials to remove larger materials to ensure the quality of the slurry output, and simultaneously remove the large pieces of material to avoid them accumulating in the screening mechanism and affecting the screening effect.

[0022] (2) The coal mine goaf grouting and filling construction equipment can be fixedly connected to the extension end of the electric telescopic rod, so that the pressing height of the scraper ring plate can be easily adjusted by the extension and retraction of the extension end of the electric telescopic rod, so as to adapt to different grout preparation heights.

[0023] (3) The coal mine goaf grouting and filling construction equipment, by rotating the guide rod on the surface of the cone bottom screen frame, so that when the cone bottom screen frame shakes up and down by the squeezing cooperation between the guide rod and the arc-shaped protrusion, the friction coefficient between the guide rod and the arc-shaped protrusion can be reduced by rotating the guide rod.

[0024] (4) The coal mine goaf grouting and filling construction equipment has a conical shield fixedly connected to the surface of the mixing shaft assembly and the support slide column. This allows the material pressing mechanism on the surface of the mixing shaft assembly and the mating point of the L-shaped fixed sleeve and the support slide column to be shielded by the conical shield, thus preventing materials from entering the mating point and ensuring the long-term normal operation of the equipment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0026] Figure 2 This is a bottom view of the material preparation tank structure of the present invention;

[0027] Figure 3 This is a cross-sectional view of the material preparation tank structure of the present invention;

[0028] Figure 4 This is a cross-sectional view of the mounting sleeve structure of the present invention;

[0029] Figure 5 For the present invention Figure 4 A magnified view of a section at point A in the middle;

[0030] Figure 6 This is a schematic diagram of the pressing mechanism structure of the present invention;

[0031] Figure 7 This is an unfolded view of the internal structure of the second limiting sleeve of the present invention;

[0032] Figure 8 This is a side view of the internal structure of the conical bottom sieve frame of the present invention;

[0033] Figure 9 This is a schematic diagram of the automatic screening mechanism structure of the present invention;

[0034] Figure 10 This is a cross-sectional view of the conical bottom sieve frame structure of the present invention;

[0035] Figure 11 This is a schematic diagram of the material removal mechanism structure of the present invention.

[0036] In the diagram: 1. Mounting support; 2. Material preparation tank; 3. Drive motor; 4. Stirring shaft assembly; 5. Pressing mechanism; 501. Electric telescopic rod; 502. Mounting sleeve; 503. Perforated convex plate; 504. Scraper ring plate; 505. Ball bearing column; 506. First limiting sleeve; 507. First limiting telescopic column; 508. First return spring; 6. Automatic screening mechanism; 601. Second limiting sleeve; 602. Second limiting telescopic column; 603. Second return spring; 604. Conical bottom screen frame; 605. Inner conical material distribution frame; 606. Installation ring sleeve; 607. Arc-shaped protrusion; 608. Guide rod; 609. L-shaped fixing sleeve; 610. Supporting slide column; 7. Unloading mechanism; 701. Foreign object collection cylinder; 702. Material conveying cylinder; 703. Unloading inclined tube; 704. Material drive roller; 705. Spiral conveying blade; 8. Circular sliding frame; 9. Circular sliding plate; 10. Limiting groove; 11. Limiting block; 12. Grouting pump; 13. Conical shield; 14. Protective ring plate; 15. Splash guard; 16. Rotating ring plate; 17. Rotating ring groove. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0038] Please see Figure 1-11 The present invention provides a technical solution:

[0039] Example 1

[0040] A coal mine goaf grouting and filling construction equipment includes an installation support 1 and a material preparation tank 2. The material preparation tank 2 is fixedly installed on the top of the installation support 1 by a bracket. A drive motor 3 is fixedly connected to the top of the installation support 1, and the output shaft of the drive motor 3 is fixedly connected to a stirring shaft assembly 4 through a coupling. One end of the stirring shaft assembly 4 passes through and extends into the interior of the material preparation tank 2. A grouting pump 12 is fixedly connected to the top of the installation support 1, and the inlet end of the grouting pump 12 is connected to the bottom of the material preparation tank 2 through a pipe.

[0041] As a preferred embodiment: To avoid scaling on the inner wall above the liquid level and to improve the adaptability of the pressing mechanism 5 to different heights, a pressing mechanism 5 is provided between the material preparation tank 2 and the stirring shaft assembly 4. The pressing mechanism 5 includes an electric telescopic rod 501, which is fixedly mounted on one side of the material preparation tank 2 by a bracket. The extended end of the electric telescopic rod 501 is fixedly connected to an mounting sleeve 502 by a bracket. A perforated convex plate 503 is slidably provided on the surface of the stirring shaft assembly 4. Limiting grooves 10 are provided on both sides of the stirring shaft assembly 4. Limiting blocks 11 are slidably connected inside the limiting grooves 10. The opposite sides of the two limiting blocks 11 are respectively connected to the perforated convex plate 503. The inner cavity is fixedly connected on both sides, and the surface of the perforated convex plate 503 is rotatably connected to the inner wall of the mounting sleeve 502 through bearings. A scraper ring plate 504 is provided on the top of the mounting sleeve 502. Both sides of the bottom of the scraper ring plate 504 are fixedly connected with ball bearings 505 that are used in conjunction with the perforated convex plate 503. A first limiting sleeve 506 is fixedly connected to the top of the mounting sleeve 502 through a bracket. A first limiting telescopic column 507 is slidably connected inside the first limiting sleeve 506, and the bottom of the first limiting telescopic column 507 is fixedly connected to the top of the scraper ring plate 504. A first return spring 508 is fixedly connected between the first limiting telescopic column 507 and the first limiting sleeve 506.

[0042] As a preferred embodiment: In order to fully utilize the screening range of the conical bottom screen frame 604 and improve the shaking effect of the conical bottom screen frame 604, an automatic screening mechanism 6 is provided between the stirring shaft assembly 4 and the mounting support 1 and located at the top of the pressing mechanism 5. The automatic screening mechanism 6 includes a second limiting sleeve 601. Two second limiting sleeves 601 are provided, and both second limiting sleeves 601 are fixedly installed on both sides of the material preparation tank 2 by brackets. A second limiting telescopic column 602 is slidably connected inside the second limiting sleeve 601, and a second return spring 603 is fixedly connected between the second limiting telescopic column 602 and the second limiting sleeve 601. The two second limiting telescopic columns 602 are rotatably connected. A conical bottom screen frame 604 is provided. The rear sides of the two second limiting sleeves 601 are fixedly connected by a bracket to an inner conical material distribution frame 605 that is used in conjunction with the conical bottom screen frame 604. An installation ring 606 is fixedly connected between the two second limiting sleeves 601. Arc-shaped protrusions 607 are fixedly connected to both sides of the top of the installation ring 606. Guide rods 608 that are used in conjunction with the arc-shaped protrusions 607 are rotatably connected to both sides of the conical bottom screen frame 604 through bearings. L-shaped fixing sleeves 609 are fixedly connected to the front and rear sides of the stirring shaft assembly 4. A support slide column 610 is slidably connected inside the L-shaped fixing sleeve 609, and the top of the support slide column 610 is fixedly connected to the bottom of the conical bottom screen frame 604.

[0043] As explained in detail: A circular slide frame 8 is fixedly connected between the two second limiting telescopic columns 602. An annular slide plate 9 is slidably connected inside the circular slide frame 8, and the inner wall of the annular slide plate 9 is fixedly connected to the outer wall of the cone bottom screen frame 604.

[0044] As a preferred embodiment: To facilitate the removal of large aggregate pieces and prevent them from occupying the filtration space of the cone-bottom screen frame 604, thus reducing the screening area of ​​the cone-bottom screen frame 604, a material removal mechanism 7 is provided between the automatic screening mechanism 6 and the stirring shaft assembly 4. The material removal mechanism 7 includes a foreign matter collection cylinder 701, which is rotatably disposed inside the cone-bottom screen frame 604. A rotating ring plate 16 is fixedly connected to the bottom of the cone-bottom screen frame 604. A rotating ring groove 17 that slides and adapts to the rotating ring plate 16 is opened on the top of the foreign matter collection cylinder 701. A protective ring plate 14 is fixedly connected to the bottom of the cone-bottom screen frame 604. The bottom of the cone-bottom screen frame 604 is located at the protective ring plate 14. A splash guard 15 is fixedly connected to the outer surface of the guard ring plate 14. A material conveying cylinder 702 is fixedly connected to the inside of the foreign object collection cylinder 701 through a bracket. A discharge inclined pipe 703 is connected to the rear side of the material conveying cylinder 702. One end of the discharge inclined pipe 703 passes through and extends to the rear side of the inner conical material distribution frame 605. A material driving roller 704 is fixedly connected to the top of the stirring shaft assembly 4. One end of the material driving roller 704 passes through the foreign object collection cylinder 701 and extends into the inside of the material conveying cylinder 702. The through contact surface between the material driving roller 704 and the foreign object collection cylinder 701 is rotatably connected by a bearing. A spiral conveying blade 705 is fixedly connected to the surface of the material driving roller 704.

[0045] Example 2

[0046] A coal mine goaf grouting and filling construction equipment includes an installation support 1 and a material preparation tank 2. The material preparation tank 2 is fixedly installed on the top of the installation support 1 by a bracket. A drive motor 3 is fixedly connected to the top of the installation support 1, and the output shaft of the drive motor 3 is fixedly connected to a stirring shaft assembly 4 through a coupling. One end of the stirring shaft assembly 4 passes through and extends into the interior of the material preparation tank 2. A grouting pump 12 is fixedly connected to the top of the installation support 1, and the inlet end of the grouting pump 12 is connected to the bottom of the material preparation tank 2 through a pipe.

[0047] As a preferred embodiment: To avoid scaling on the inner wall above the liquid level and to improve the adaptability of the pressing mechanism 5 to different heights, a pressing mechanism 5 is provided between the material preparation tank 2 and the stirring shaft assembly 4. The pressing mechanism 5 includes an electric telescopic rod 501, which is fixedly mounted on one side of the material preparation tank 2 by a bracket. The extended end of the electric telescopic rod 501 is fixedly connected to an mounting sleeve 502 by a bracket. A perforated convex plate 503 is slidably provided on the surface of the stirring shaft assembly 4. Limiting grooves 10 are provided on both sides of the stirring shaft assembly 4. Limiting blocks 11 are slidably connected inside the limiting grooves 10. The opposite sides of the two limiting blocks 11 are respectively connected to the perforated convex plate 503. The inner cavity is fixedly connected on both sides, and the surface of the perforated convex plate 503 is rotatably connected to the inner wall of the mounting sleeve 502 through bearings. A scraper ring plate 504 is provided on the top of the mounting sleeve 502. Both sides of the bottom of the scraper ring plate 504 are fixedly connected with ball bearings 505 that are used in conjunction with the perforated convex plate 503. A first limiting sleeve 506 is fixedly connected to the top of the mounting sleeve 502 through a bracket. A first limiting telescopic column 507 is slidably connected inside the first limiting sleeve 506, and the bottom of the first limiting telescopic column 507 is fixedly connected to the top of the scraper ring plate 504. A first return spring 508 is fixedly connected between the first limiting telescopic column 507 and the first limiting sleeve 506.

[0048] As a preferred embodiment: In order to fully utilize the screening range of the conical bottom screen frame 604 and improve the shaking effect of the conical bottom screen frame 604, an automatic screening mechanism 6 is provided between the stirring shaft assembly 4 and the mounting support 1 and located at the top of the pressing mechanism 5. The automatic screening mechanism 6 includes a second limiting sleeve 601. Two second limiting sleeves 601 are provided, and both second limiting sleeves 601 are fixedly installed on both sides of the material preparation tank 2 by brackets. A second limiting telescopic column 602 is slidably connected inside the second limiting sleeve 601, and a second return spring 603 is fixedly connected between the second limiting telescopic column 602 and the second limiting sleeve 601. The two second limiting telescopic columns 602 are rotatably connected. A conical bottom screen frame 604 is provided. The rear sides of the two second limiting sleeves 601 are fixedly connected by a bracket to an inner conical material distribution frame 605 that is used in conjunction with the conical bottom screen frame 604. An installation ring 606 is fixedly connected between the two second limiting sleeves 601. Arc-shaped protrusions 607 are fixedly connected to both sides of the top of the installation ring 606. Guide rods 608 that are used in conjunction with the arc-shaped protrusions 607 are rotatably connected to both sides of the conical bottom screen frame 604 through bearings. L-shaped fixing sleeves 609 are fixedly connected to the front and rear sides of the stirring shaft assembly 4. A support slide column 610 is slidably connected inside the L-shaped fixing sleeve 609, and the top of the support slide column 610 is fixedly connected to the bottom of the conical bottom screen frame 604.

[0049] As explained in detail: A circular slide frame 8 is fixedly connected between the two second limiting telescopic columns 602. An annular slide plate 9 is slidably connected inside the circular slide frame 8, and the inner wall of the annular slide plate 9 is fixedly connected to the outer wall of the cone bottom screen frame 604.

[0050] As a preferred embodiment: To facilitate the removal of large aggregate pieces and prevent them from occupying the filtration space of the cone-bottom screen frame 604, thus reducing the screening area of ​​the cone-bottom screen frame 604, a material removal mechanism 7 is provided between the automatic screening mechanism 6 and the stirring shaft assembly 4. The material removal mechanism 7 includes a foreign matter collection cylinder 701, which is rotatably disposed inside the cone-bottom screen frame 604. A rotating ring plate 16 is fixedly connected to the bottom of the cone-bottom screen frame 604. A rotating ring groove 17 that slides and adapts to the rotating ring plate 16 is opened on the top of the foreign matter collection cylinder 701. A protective ring plate 14 is fixedly connected to the bottom of the cone-bottom screen frame 604. The bottom of the cone-bottom screen frame 604 is located at the protective ring plate 14. A splash guard 15 is fixedly connected to the outer surface of the guard ring plate 14. A material conveying cylinder 702 is fixedly connected to the inside of the foreign object collection cylinder 701 through a bracket. A discharge inclined pipe 703 is connected to the rear side of the material conveying cylinder 702. One end of the discharge inclined pipe 703 passes through and extends to the rear side of the inner conical material distribution frame 605. A material driving roller 704 is fixedly connected to the top of the stirring shaft assembly 4. One end of the material driving roller 704 passes through the foreign object collection cylinder 701 and extends into the inside of the material conveying cylinder 702. The through contact surface between the material driving roller 704 and the foreign object collection cylinder 701 is rotatably connected by a bearing. A spiral conveying blade 705 is fixedly connected to the surface of the material driving roller 704.

[0051] Both the stirring shaft assembly 4 and the support slide column 610 are fixedly connected to a conical shield 13.

[0052] The advantage of Embodiment 2 over Embodiment 1 is that by fixing conical shields 13 to the surfaces of both the stirring shaft assembly 4 and the supporting slide column 610, the material pressing mechanism 5 on the surface of the stirring shaft assembly 4 and the mating points of the L-shaped fixed sleeve 609 and the supporting slide column 610 can all be shielded by the conical shields 13 to prevent materials from entering the mating points, thereby ensuring the long-term normal operation of the device.

[0053] This invention also discloses a method for grouting and filling coal mine goaf areas, specifically including the following steps:

[0054] S1. The aggregate is poured at a constant speed to the top of the inner conical distribution frame 605 by the on-site lifting mechanism. The material is tilted and falls onto the inclined inner wall of the cone bottom screen frame 604 by the inclined cone inside the inner cone distribution frame 605. The large aggregate is left in the cone bottom screen frame 604 by the material rolling and sieving. After adding appropriate powder, water can be added for mixing. Several stirring rods are fixedly installed on the surface of the stirring shaft assembly 4.

[0055] S2. Start the drive motor 3. The drive motor 3 starts its output shaft to drive the stirring shaft assembly 4 to stir and prepare the mixture inside the material preparation tank 2. The rotation of the stirring shaft assembly 4 will drive the perforated convex plate 503 to rotate synchronously through the cooperation of its main body limiting groove 10 and limiting block 11. During the rotation of the perforated convex plate 503, the convex point on its top will continuously squeeze and lift the ball column 505. The ball column 505 will drive the scraper ring plate 504 to scrape up and down repeatedly. The scraper ring plate 504 can scrape and backfill the material splashed on the top of the inner wall material.

[0056] S3. While the stirring shaft assembly 4 drives the scraper ring plate 504 to scrape the material back and forth, the stirring shaft assembly 4 will also drive the L-shaped fixed sleeve 609 to rotate synchronously. The rotation of the L-shaped fixed sleeve 609 drives the support slide column 610 to rotate, and the support slide column 610 drives the conical bottom screen frame 604 to rotate. The rotation of the conical bottom screen frame 604 will promote the material to pass through the screen in multiple directions. The rotation of the conical bottom screen frame 604 will drive the guide rod 608 to rotate synchronously. During the rotation of the guide rod 608, it will repeatedly press and contact the arc-shaped protrusion 607. Through contact, the guide rod 608 will briefly drive the conical bottom screen frame 604 to shake up and down. The reciprocating shaking of the conical bottom screen frame 604 can vibrate the material. As the material vibrates and falls from top to bottom through the screen, the large pieces of aggregate will fall into the low-point foreign matter collection cylinder 701.

[0057] S4. The stirring shaft assembly 4 drives the cone bottom screen frame 604 to rotate and shake the screened material through the L-shaped fixed sleeve 609 and the supporting sliding column 610. At the same time, the stirring shaft assembly 4 also drives the material drive roller 704 to rotate synchronously. The rotation of the material drive roller 704 drives the spiral transmission blade 705. The rotation of the spiral transmission blade 705 will continuously convey the large pieces of material accumulated inside the foreign object collection cylinder 701 upwards in a spiral. After the material is conveyed upwards to a certain height, it will be discharged and removed through the discharge inclined pipe 703.

[0058] Furthermore, all content not described in detail in this specification belongs to the prior art known to those skilled in the art. The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, and all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.

[0059] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A coal mine goaf grouting and filling construction equipment, comprising a mounting support (1) and a material preparation tank (2), the material preparation tank (2) is fixedly arranged on the top of the mounting support (1) through a support, characterized in that: A drive motor (3) is fixedly connected to the top of the mounting support (1), and the output shaft of the drive motor (3) is fixedly connected to a stirring shaft assembly (4) through a coupling. One end of the stirring shaft assembly (4) penetrates and extends into the interior of the material preparation tank (2). A pressing mechanism (5) is provided between the material preparation tank (2) and the stirring shaft assembly (4). An automatic screening mechanism (6) is provided between the stirring shaft assembly (4) and the mounting support (1) and at the top of the pressing mechanism (5). A discharge mechanism (7) is provided between the automatic screening mechanism (6) and the stirring shaft assembly (4). The pressing mechanism (5) includes an electric telescopic rod (501), which is fixedly mounted on one side of the material preparation tank (2) by a bracket. The extension end of the electric telescopic rod (501) is fixedly connected to an mounting sleeve (502) by a bracket. A perforated convex plate (503) is slidably provided on the surface of the stirring shaft assembly (4), and the surface of the perforated convex plate (503) is rotatably connected to the inner wall of the mounting sleeve (502) by a bearing. A scraper ring plate (504) is provided on the top of the mounting sleeve (502). 4) Both sides of the bottom are fixedly connected with ball bearings (505) that are used in conjunction with the perforated convex plate (503). The top of the mounting sleeve (502) is fixedly connected with a first limiting sleeve (506) through a bracket. The first limiting sleeve (506) is slidably connected with a first limiting telescopic column (507). The bottom of the first limiting telescopic column (507) is fixedly connected with the top of the scraper ring plate (504). A first return spring (508) is fixedly connected between the first limiting telescopic column (507) and the first limiting sleeve (506). The automatic screening mechanism (6) includes a second limiting sleeve (601). Two second limiting sleeves (601) are provided, and both second limiting sleeves (601) are fixedly installed on both sides of the material preparation tank (2) by brackets. A second limiting telescopic column (602) is slidably connected inside the second limiting sleeve (601), and a second return spring (603) is fixedly connected between the second limiting telescopic column (602) and the second limiting sleeve (601). A conical bottom screen frame (604) is rotatably installed between the two second limiting telescopic columns (602). The rear sides of the two second limiting sleeves (601) are jointly fixedly connected to the conical bottom screen frame (604) by brackets. 4) The inner conical material distribution frame (605) is used in conjunction with the two second limiting sleeves (601) and the mounting ring (606) is fixedly connected between them. The top of the mounting ring (606) is fixedly connected to both sides of the top, and the conical bottom screen frame (604) is rotatably connected to the guide rod (608) used in conjunction with the arc-shaped protrusion (607) through the bearings on both sides. The front and rear sides of the stirring shaft assembly (4) are fixedly connected to the L-shaped fixing sleeve (609). The L-shaped fixing sleeve (609) is slidably connected to the support slide column (610) inside, and the top of the support slide column (610) is fixedly connected to the bottom of the conical bottom screen frame (604). The material removal mechanism (7) includes a foreign object collection cylinder (701), which is rotatably disposed inside a conical bottom screen frame (604). A rotating ring plate (16) is fixedly connected to the bottom of the conical bottom screen frame (604). A rotating ring groove (17) that slides and adapts to the rotating ring plate (16) is opened on the top of the foreign object collection cylinder (701). A protective ring plate (14) is fixedly connected to the bottom of the conical bottom screen frame (604). A splash guard (15) is fixedly connected to the bottom of the conical bottom screen frame (604) and on the outer surface of the protective ring plate (14). The interior of the foreign object collection cylinder (701) is fixedly connected by a bracket. There is a material conveying cylinder (702), and the rear side of the material conveying cylinder (702) is connected to a discharge inclined tube (703). One end of the discharge inclined tube (703) passes through and extends to the rear side of the inner conical material distribution frame (605). The top of the stirring shaft assembly (4) is fixedly connected to a material driving roller (704), and one end of the material driving roller (704) passes through the foreign matter collection cylinder (701) and extends into the interior of the material conveying cylinder (702). The through contact surface of the material driving roller (704) and the foreign matter collection cylinder (701) is rotatably connected by a bearing. The surface of the material driving roller (704) is fixedly connected to a spiral transmission blade (705). The stirring shaft assembly (4) has limit grooves (10) on both sides. Limit blocks (11) are slidably connected inside the limit grooves (10). The two limit blocks (11) are fixedly connected to the two sides of the cavity of the perforated convex plate (503) on opposite sides respectively.

2. The coal mine goaf grouting and filling construction equipment according to claim 1, characterized in that: A circular slide frame (8) is fixedly connected between the two second limiting telescopic columns (602). An annular slide plate (9) is slidably connected inside the circular slide frame (8), and the inner wall of the annular slide plate (9) is fixedly connected to the outer wall of the cone bottom screen frame (604).

3. The coal mine goaf grouting and filling construction equipment according to claim 1, characterized in that: The top of the mounting support (1) is fixedly connected to a grouting pump (12), and the inlet end of the grouting pump (12) is connected to the bottom of the material preparation tank (2) through a pipe.

4. The coal mine goaf grouting and filling construction equipment according to claim 1, characterized in that: The surfaces of the stirring shaft assembly (4) and the support slide (610) are both fixedly connected with conical shields (13).

5. A method for grouting and filling construction of a coal mine goaf, using the coal mine goaf grouting and filling construction equipment according to any one of claims 1-4, characterized in that: Specifically, the following steps are included: S1. The aggregate is poured at a constant speed to the top of the inner conical distribution frame (605) by the on-site lifting mechanism. The material is tilted and dropped onto the inclined inner wall of the cone bottom screen frame (604) by the inclined cone inside the inner conical distribution frame (605). The large aggregate is left in the cone bottom screen frame (604) after the material rolls down and is screened. Water can be added and mixed after appropriate powder is added later. S2. Start the drive motor (3). The drive motor (3) starts its output shaft to drive the stirring shaft assembly (4) to stir and prepare the mixture inside the material preparation tank (2). The stirring shaft assembly (4) rotates and drives the perforated convex plate (503) to rotate synchronously through the cooperation of its main body limiting groove (10) and limiting block (11). During the rotation of the perforated convex plate (503), the convex point on its top will continuously squeeze and lift the ball column (505). The ball column (505) will repeatedly lift and drive the scraper ring plate (504) to scrape up and down repeatedly. The scraper ring plate (504) can scrape and backfill the material splashed on the top of the inner wall material. S3. While the stirring shaft assembly (4) drives the scraper ring plate (504) to scrape the material back and forth, the stirring shaft assembly (4) will also drive the L-shaped fixed sleeve (609) to rotate. The rotation of the L-shaped fixed sleeve (609) drives the support slide column (610) to rotate. The support slide column (610) drives the cone bottom screen frame (604) to rotate. The rotation of the cone bottom screen frame (604) will promote the material to pass through the screen in multiple directions. The rotation of the cone bottom screen frame (604) will drive the guide rod (608) to rotate. During the rotation of the guide rod (608), it will repeatedly press and contact the arc-shaped protrusion (607). Through contact, the guide rod (608) will briefly drive the cone bottom screen frame (604) to shake up and down. The reciprocating shaking of the cone bottom screen frame (604) can vibrate the material. As the material vibrates and the material rolls down from top to bottom through the screen, the large pieces of aggregate intercepted will fall into the low point foreign matter collection cylinder (701). S4. The stirring shaft assembly (4) drives the cone bottom screen frame (604) to rotate and shake the screen material through the L-shaped fixed sleeve (609) and the support slide column (610). At the same time, the stirring shaft assembly (4) also drives the material drive roller (704) to rotate synchronously. The rotation of the material drive roller (704) drives the spiral transmission blade (705). The rotation of the spiral transmission blade (705) will continuously convey the large pieces of material accumulated inside the foreign matter collection cylinder (701) upwards in a spiral. After the material is conveyed upwards to a certain height, it will be discharged and removed through the discharge inclined pipe (703).

6. The method according to claim 5, wherein: In step S1, a number of stirring rods are fixedly arranged on the surface of the stirring shaft assembly (4).

Images