A material receiving buffer device for a feeding well

Abstract

The invention discloses a material receiving buffer device for a feeding well, wherein the lower part of the feeding well is a closed chamber and a material storage bin which are connected in sequence; the material receiving buffer device is arranged in the closed chamber, and comprises a material receiving device foundation arranged just below the center of the feeding well, the upper surface of the material receiving device foundation is arranged in a segmented inclination, the 45° inclined surface is located just below the center of the feeding well, and the lower part of the 60° inclined surface is connected to the wall of the material storage bin; a groove is provided on the 45° inclined surface of the material receiving device foundation, a material receiving steel plate is installed in the groove, a rear baffle is welded at the rear of the material receiving steel plate, and side baffles are welded on both sides, an internal thread embedded component is arranged at the bottom of the groove, one end of the external thread guide rod is connected to the internal thread embedded component, and the other end is used to install a buffer spring, and a nut is used to fix the material receiving steel plate; a steel plate is installed on the side wall of the groove by an anchor rod, and a steel ball is installed between the steel plate and the material receiving steel plate. The invention solves the problem of receiving and buffering materials falling at high speed in the feeding well of underground mines.

Description

Technical Field

[0001] The invention belongs to the technical field of mining engineering, and in particular relates to a material receiving buffer device for a feeding shaft, which is suitable for buffering high-speed falling materials in a feeding shaft of an underground mine. Background Art

[0002] During the construction and production process of underground mines, cement, sand, coal gangue and other materials need to be delivered to the bottom of the well through a feeding well. A storage bin is generally required at the bottom of the feeding well. The materials falling at high speed in the feeding well will seriously damage the storage bin, and will also cause the materials in the cabin to stick together due to strong impact, resulting in a bunker explosion accident and affecting the continuous operation of the system. Therefore, a material receiving buffer structure needs to be set between the feeding well and the storage bin to prevent the high-speed falling materials from directly hitting the storage bin.

[0003] The existing feeding well buffer device uses a mechanical buffer to achieve material receiving buffering of falling materials. The buffer is composed of a buffer pad, an umbrella frame, a guide rod, and a base. This structure needs to be improved in terms of system reliability and service life. Summary of the invention

[0004] The purpose of the present invention is to provide a material receiving and buffering device for a feeding pit to solve the problem of receiving and buffering high-speed falling materials in the feeding pit of underground mines, avoid the impact and damage of high-speed falling materials on the storage bin, and improve the service life of the feeding system.

[0005] The present invention is achieved by adopting the following technical solutions:

[0006] A material receiving buffer device for a feeding well, wherein a closed chamber and a material storage bin are sequentially connected below the feeding well, and the feeding well and the material storage bin are eccentrically arranged; wherein the material receiving buffer device is arranged in the closed chamber, and comprises a material receiving device foundation arranged in the closed chamber and directly below the center of the feeding well, wherein the upper surface of the material receiving device foundation is arranged in sections, and is respectively in the form of a 45° inclined surface and a 60° inclined surface in a bent shape, wherein the 45° inclined surface is located directly below the center of the feeding well, and the 60° inclined surface is located directly below the center of the feeding well. The lower part of the inclined surface is connected to the wall of the storage bin; a groove is opened on the 45° inclined surface on the basis of the receiving device, and a receiving steel plate is installed in the groove. A rear baffle is welded to the rear of the receiving steel plate and side baffles are welded on both sides. An internal thread embedded component is arranged at the bottom of the groove, one end of the external thread guide rod is connected to the internal thread embedded component, and the other end is used to install a buffer spring, and a nut is used to fix the receiving steel plate; a steel plate is installed on the side wall of the groove by using an anchor rod, and a steel ball is installed between the steel plate and the receiving steel plate.

[0007] A further improvement of the present invention is that the foundation of the material receiving device is built with reinforced concrete.

[0008] A further improvement of the present invention is that a groove is reserved on the 45° inclined surface of the material receiving device foundation when casting.

[0009] A further improvement of the present invention is that the thickness of the connecting steel plate is a wear-resistant steel plate of 100 to 200 mm;

[0010] Countersunk holes are evenly distributed on the material receiving steel plate, but there shall be no countersunk holes within the projection area of ​​the feeding well on the material receiving steel plate; lifting ears for lifting are arranged on both sides of the material receiving steel plate 7.

[0011] A further improvement of the present invention is that the internal thread embedded component is connected to the steel skeleton before pouring the foundation of the material connection device.

[0012] A further improvement of the present invention is that a front retaining wall is installed at the upper edge of the storage bin in the closed chamber; wall-mounted retaining tiles are installed on the walls on both sides of the closed chamber between the front retaining wall and the rear baffle, and the wall-mounted retaining tiles are fixed to the walls on both sides of the closed chamber using anchor rods I; an I-beam is arranged on the top of the closed chamber, the upper baffle is fixed on multiple I-beams, and the front and rear ends of the upper baffle are both inclined.

[0013] A further improvement of the present invention is that the front retaining wall is built with reinforced concrete and the inner side is fully paved with steel plates.

[0014] A further improvement of the present invention is that two closed walls are arranged on the outlet side of the closed chamber, a pressure relief pipe arranged in the closed chamber passes through the closed wall into the water pool, an electric gate valve I is installed on the pressure relief pipe, and a pressure sensor is installed in the closed chamber near the closed wall.

[0015] A further improvement of the present invention is that a compressed air blowing device is also arranged in the closed chamber, which includes a main pipe, an electric gate valve II, a secondary pipe and a nozzle; wherein the main pipe is connected to the compressed air pipeline system underground in the mine, and the electric gate valve II is installed on the main pipe outside the closed wall of the closed chamber; the main pipe is laid along the bottom plate of the closed chamber to the back side of the material receiving device foundation, and the main pipe is arranged in a "T" shape on the back side of the material receiving device foundation, and the main pipe is connected to multiple secondary pipes, each secondary pipe is connected to a nozzle, and the nozzles are evenly distributed on the upper edge and both side edges of the material receiving steel plate.

[0016] A further improvement of the present invention is that the diameters of the main pipe and the pressure relief pipe are the same; the nozzle on the upper edge of the receiving steel plate forms a 90° angle with the back of the receiving device base, and the nozzles on both sides of the receiving steel plate form a 45° angle with the side of the receiving device base.

[0017] The present invention has at least the following beneficial technical effects:

[0018] 1. The feeding well is separated from the center of the storage bin by a certain distance. The foundation of the receiving device built with reinforced concrete is used to withstand the impact of high-speed falling materials. The receiving steel plate with a buffer spring at the bottom is used to buffer the high-speed falling materials, and the structure is safe and reliable.

[0019] 2. The material receiving device is at a large distance from the bottom of the feeding well. The compressed air blowing device continuously uses compressed air for blowing while the feeding operation is in progress, which can effectively avoid the accumulation of materials on the material receiving device.

[0020] 3. The rear baffle, side baffle, front baffle, wall-mounted baffle tile, upper baffle and thickened upper part of the storage bin can effectively resist the secondary rebound of high-speed falling materials after they contact the receiving device. This prevents the high-speed rebounding materials from damaging the surrounding tunnel walls after the system has been running for a long time, and preventing the wall from falling off and entering the storage bin, causing the underground filling pipeline to be blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the material receiving buffer structure of the feeding well of the present invention.

[0022] Figure 2 It is a schematic diagram of the internal thread embedded component and the external thread guide rod of the present invention.

[0023] Figure 3 It is a rear view of the compressed air blowing device of the present invention.

[0024] Figure 4 It is a top view of the compressed air blowing device of the present invention.

[0025] Description of reference numerals:

[0026] 1. Enclosed chamber; 2. Storage silo; 3. Feeding well; 4. Material receiving device foundation; 5. Rear baffle; 6. Side baffle; 7. Material receiving steel plate; 8. Compressed air blowing device; 9. Front retaining wall; 10. Wall-mounted retaining tile; 11. Upper baffle; 12. Enclosed wall; 13. Pressure relief pipe; 14. I-beam; 15. Internal thread embedded component; 16. Groove; 17. External thread guide rod; 18. Buffer spring; 19. Steel plate; 20. Steel ball; 21. Water tank; 22. Pressure sensor; 23. Electric gate valve I; 24. Main pipe; 25. Electric gate valve II; 26. Secondary pipe; 27. Nozzle; 28. Countersunk hole; 29. ​​Lifting ear; 30. Anchor rod. DETAILED DESCRIPTION

[0027] The specific technical solutions of the present invention are described in detail below in conjunction with the accompanying drawings, but this does not mean to limit the protection scope of the present invention.

[0028] like Figure 1As shown, the present invention provides a material receiving buffer device for a feeding well, wherein the feeding well 3 and the storage bin 2 are arranged eccentrically, and a closed chamber 1 is constructed between the two; a receiving device foundation 4 is constructed directly below the center of the feeding well 3 in the closed chamber 1, and in order to withstand the huge impact force and impact vibration of the falling materials, the receiving device foundation 4 is built with reinforced concrete, and the size of the receiving device foundation 4 is calculated according to the size of the impact vibration, and its depth needs to be 3 to 4 meters below the bottom plate of the closed chamber 1; the upper surface of the receiving device foundation 4 is arranged in a segmented tilt, wherein the 45° inclined surface is located directly below the center of the feeding well 3, a groove 16 is opened on the upper surface, and the lower part of the 60° inclined surface is connected to the wall of the storage bin 2. A receiving steel plate 7 is installed in the groove 16, and the receiving steel plate 7 is a wear-resistant steel plate with a thickness of 100 to 200 mm, and the thickness can be adjusted accordingly with the depth of the feeding well; a rear baffle 5 is welded to the rear of the receiving steel plate 7, and side baffles 6 are welded on both sides.

[0029] A front retaining wall 9 is installed at the upper edge of the storage bin 2 in the closed chamber 1. The front retaining wall 9 is built with reinforced concrete and the inner side is covered with steel plates. Wall-mounted retaining tiles 10 are installed on the walls on both sides of the closed chamber 1 between the front retaining wall 9 and the rear baffle 5. The wall-mounted retaining tiles 10 are fixed to the walls on both sides of the closed chamber 1 using anchor rods I. The size of each wall-mounted retaining tile 10 is 500mm×500mm. An I-beam 14 is arranged on the top, and an upper baffle 11 is fixed on a plurality of I-beams 14. The front and rear ends of the upper baffle 11 are both inclined. Two closed walls 12 are arranged on the outlet side of the closed chamber 1. A pressure relief pipe 13 arranged in the closed chamber 1 passes through the closed wall 12 and enters the pool 21. An electric gate valve I 23 is installed on the pressure relief pipe 13. A pressure sensor 22 is installed in the closed chamber 1 near the closed wall 12.

[0030] like Figure 2 As shown, a groove 16 is reserved when pouring the 45° inclined surface on the material receiving device foundation 4, and an internal thread embedded component 15 is arranged at the bottom of the groove 16. The internal thread embedded component 15 is connected to the steel skeleton before pouring the material receiving device foundation. One end of the external thread guide rod 17 is connected to the internal thread embedded component 15, and the other end is used to install the buffer spring 18, and the material receiving steel plate 7 is fixed with a nut; the side wall of the groove 16 is installed with a steel plate 19 by an anchor rod 30, and a steel ball 20 is installed between the steel plate 19 and the material receiving steel plate 7.

[0031] like Figure 1 , Figure 3 , Figure 4As shown, a compressed air blowing device 8 is also provided in the closed chamber 1, which is composed of a main pipe 24, an electric gate valve II 25, a secondary pipe 26, and a nozzle 27; wherein the main pipe 24 is connected to the underground compressed air pipeline system of the mine, and the electric gate valve II 25 is installed on the main pipe 24 outside the closed wall 12; the main pipe 24 has the same pipe diameter as the pressure relief pipe 13, the main pipe 24 is laid along the bottom plate of the closed chamber 1 to the back of the material receiving device foundation 4, the main pipe 24 is arranged in a "T" shape on the back of the material receiving device foundation 4, the main pipe 24 is connected to a plurality of secondary pipes 26, each secondary pipe 26 is connected to a nozzle 27, and the nozzles 27 are evenly distributed on the upper edge and both side edges of the material receiving steel plate 7; the nozzle 27 on the upper edge of the material receiving steel plate 7 is at a 90° angle to the back of the material receiving device foundation 4, and the nozzles 27 on the both side edges of the material receiving steel plate 7 are at a 45° angle to the side of the material receiving device foundation 4. Countersunk holes 28 are evenly distributed on the receiving steel plate 7, but there shall be no countersunk holes 28 within the projection area of ​​the feeding well 3 on the receiving steel plate 7. The countersunk holes 28 are used to fix the receiving steel plate 7 with nuts; and lifting ears 29 for lifting are set on both sides of the receiving steel plate 7.

[0032] The working principle and implementation process of the present invention are:

[0033] Before feeding, the feeding well 3 opens the electric gate valve II 25, and the compressed air starts to purge the receiving steel plate 7; when the pressure in the closed chamber 1 gradually increases, the pressure sensor 22 reaches the set value, and sends a signal to open the electric gate valve I. The main pipe 24 has the same diameter as the pressure relief pipe 13, which can maintain the closed chamber 1 at the set pressure; the feeding well 3 starts to feed, and the material falls on the receiving steel plate 7 at a high speed. The receiving steel plate 7 uses the buffer spring 18 to buffer the material at a high speed. The rear baffle 5, side baffle 6, front baffle wall 9, and wall-mounted baffle tile 10 can effectively resist the secondary rebound of high-speed falling materials and protect the closed chamber 1; compressed air is transmitted to each nozzle 27 distributed on the upper edge and both sides of the receiving steel plate 7 through the main pipe 24 and the secondary pipe 26, and the materials are continuously purged, so that the materials fall into the storage bin 2. When the materials in the storage bin 2 reach the storage height, the feeding well 3 stops feeding, and the electric gate valve II 25 and the electric gate valve I 23 are closed in turn. The operator regularly cleans the scattered materials on the ground of the closed chamber 1.

[0034] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A material receiving buffer device for a feeding well, characterized in that: Below the feeding well (3) are a closed chamber (1) and a storage bin (2) which are connected in sequence, and the feeding well (3) and the storage bin (2) are eccentrically arranged; wherein, The material receiving buffer device is arranged in a closed chamber (1), and comprises a material receiving device foundation (4) arranged in the closed chamber (1) and directly below the center of a feeding well (3); the upper surface of the material receiving device foundation (4) is arranged in sections, and is respectively in the form of a 45° inclined surface and a 60° inclined surface in a bent shape, wherein the 45° inclined surface is located directly below the center of the feeding well (3), and the lower part of the 60° inclined surface is connected to the wall of a storage bin (2); a groove (16) is provided on the 45° inclined surface of the material receiving device foundation (4), and a A material connection steel plate (7) is provided, a rear baffle (5) is welded to the rear of the material connection steel plate (7), side baffles (6) are welded to both sides, an internal thread embedded component (15) is provided at the bottom of the groove (16), one end of an external thread guide rod (17) is connected to the internal thread embedded component (15), and the other end is used to install a buffer spring (18), and a nut is used to fix the material connection steel plate (7); a steel plate (19) is installed on the side wall of the groove (16) by using an anchor rod (30), and a steel ball (20) is installed between the steel plate (19) and the material connection steel plate (7); The material receiving device foundation (4) is constructed of reinforced concrete; A groove (16) is reserved on the 45° inclined surface of the material receiving device foundation (4) when casting.

2. A material receiving buffer device for a feeding well according to claim 1, characterized in that: The connecting steel plate (7) is a wear-resistant steel plate with a thickness of 100 to 200 mm; Countersunk holes (28) are evenly spaced on the material receiving steel plate (7), but no countersunk holes (28) are allowed within the projection area of ​​the material feeding well (3) on the material receiving steel plate (7); and lifting ears (29) for lifting are arranged on both sides of the material receiving steel plate (7).

3. A material receiving buffer device for a feeding well according to claim 1, characterized in that: The internal thread embedded component (15) is connected to the steel bar skeleton before pouring the material connection device foundation.

4. A material receiving buffer device for a feeding well according to claim 1, characterized in that: A front retaining wall (9) is installed at the upper edge of a storage bin (2) in a sealed chamber (1); wall-mounted retaining tiles (10) are installed on the walls on both sides of the sealed chamber (1) between the front retaining wall (9) and the rear retaining plate (5), and the wall-mounted retaining tiles (10) are fixed to the walls on both sides of the sealed chamber (1) using anchor rods I; an I-beam (14) is arranged on the top of the sealed chamber (1), and an upper retaining plate (11) is fixed on a plurality of I-beams (14), and the front and rear ends of the upper retaining plate (11) are both inclined.

5. A material receiving buffer device for a feeding well according to claim 4, characterized in that: The front retaining wall (9) is built with reinforced concrete and the inner side is fully paved with steel plates.

6. The material receiving buffer device of a feeding well according to claim 1, characterized in that: Two sealed walls (12) are arranged on the outlet side of the sealed chamber (1), a pressure relief pipe (13) arranged in the sealed chamber (1) passes through the sealed wall (12) and enters the water pool (21), and an electric gate valve I (23) is installed on the pressure relief pipe (13), and a pressure sensor (22) is installed in the sealed chamber (1) near the sealed wall (12).

7. A material receiving buffer device for a feeding well according to claim 6, characterized in that: A compressed air blowing device (8) is also provided in the sealed chamber (1), comprising a main pipe (24), an electric gate valve II (25), a secondary pipe (26) and a nozzle (27); wherein the main pipe (24) is connected to the underground compressed air pipeline system of the mine, and the electric gate valve II (25) is installed on the main pipe (24) outside the sealed wall (12) of the sealed chamber (1); the main pipe (24) is laid along the bottom plate of the sealed chamber (1) to the back of the material receiving device foundation (4), and the main pipe (24) is arranged in a "T" shape on the back of the material receiving device foundation (4), and the main pipe (24) is connected to a plurality of secondary pipes (26), each of which is connected to a nozzle (27), and the nozzles (27) are evenly distributed on the upper edge and both side edges of the material receiving steel plate (7).

8. A material receiving buffer device for a feeding well according to claim 7, characterized in that: The main pipe (24) and the pressure relief pipe (13) have the same diameter; the nozzle (27) on the upper edge of the material receiving steel plate (7) forms an angle of 90° with the back of the material receiving device base (4), and the nozzles (27) on both side edges of the material receiving steel plate (7) form an angle of 45° with the side of the material receiving device base (4).

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