Anti-deformation type circulating stirring mechanism and high-fluidity coal bunker provided with same

Abstract

The invention discloses an anti-deformation type circulating stirring mechanism and a high-fluidity coal bunker provided with the same, and belongs to the technical field of coal mining auxiliary equipment.The mechanism comprises a stirring shaft and a stirring motor which are transversely arranged, a plurality of main stirring blades extending in the radial direction of the stirring shaft are installed on the stirring shaft, and auxiliary stirring blades are connected to the ends of the main stirring blades; a plurality of protective steel wires completely surrounding the auxiliary stirring blade are wound in the length direction of the auxiliary stirring blade, the head ends and the tail ends of all the protective steel wires are fastened by fastening assemblies installed on the side wall of the main stirring blade, and all the fastened protective steel wires are in a tensioned state. The protective steel wires wrap the auxiliary stirring blades through tensile force to form an external rigid protective layer, impact force generated when coal falls and transverse extrusion force generated when the coal is stacked can be effectively dispersed, meanwhile, the steel wires limit deformation of the auxiliary stirring blades, and the deformation risk of the auxiliary stirring blades is remarkably reduced; and the diameter of the protective steel wire is very small, so that the problem that the stirring resistance is greatly increased due to the reinforcing ribs is avoided.

Description

Technical Field

[0001] This invention relates to the field of coal mining auxiliary equipment technology, specifically to a variable-form circulating agitator and a high-flow coal bunker equipped with the same mechanism. Background Technology

[0002] During coal mining, coal needs to be temporarily stored in coal bunkers before being transported to subsequent transportation stages (such as belt conveyors and mine cars) through the bottom discharge port. Due to the uneven particle size, large moisture variations, and high bulk density of coal, long-term storage easily leads to the formation of a compacted layer or bridging at the bottom of the bunker (i.e., localized coal accumulation and blockage, causing interruption of the discharge channel), severely affecting discharge efficiency and even causing production stoppages. To improve the fluidity of coal at the bottom of the bunker, existing technologies typically install a stirring mechanism at the bottom of the bunker. This mechanical stirring breaks down the compacted structure of the coal, allowing it to loosen and fall smoothly. A typical structure of a traditional stirring mechanism includes: a horizontally positioned stirring shaft (driven by a stirring motor), multiple axially distributed main stirring blades (extending radially, directly contacting and propelling the coal), and auxiliary stirring blades vertically connected to the ends of the main stirring blades (expanding the stirring range and covering more coal areas). However, existing stirring mechanisms still have the following problems in practical applications.

[0003] Auxiliary stirring blades are prone to deformation: As a component that extends directly to the densely packed coal area, the auxiliary stirring blades need to withstand the impact of coal falling from above and resist the lateral compression generated when coal is piled up. Traditional auxiliary stirring blades are usually made of ordinary steel plates or alloy plates in one piece, which has limited strength. Under long-term impact and compression, they are prone to bending, twisting or even breaking, resulting in a reduction in the stirring range and the inability to effectively loosen local coal, ultimately affecting the discharge efficiency. In addition, if the deformed auxiliary stirring blades need to be replaced, the main stirring blades or the entire stirring mechanism must be disassembled first, which is complicated and time-consuming, seriously affecting the normal operation of the coal bunker.

[0004] Excessive stirring resistance: To enhance the strength of the auxiliary stirring blade, existing technologies often weld multiple reinforcing ribs (such as metal strips) between the main stirring blade and the auxiliary stirring blade to prevent deformation by increasing structural rigidity; however, the introduction of reinforcing ribs significantly increases the contact area between the stirring mechanism and the coal. Not only do the main stirring blade and the auxiliary stirring blade themselves rub against the coal, but the surface of the reinforcing ribs will also generate excessive resistance with the coal, leading to increased motor energy consumption, aggravated mechanical wear, and even motor failure due to overload. Summary of the Invention

[0005] The first technical problem to be solved by the present invention is to provide a circulating agitator mechanism for preventing deformation, which is mainly used in coal bunkers. By wrapping the auxiliary agitator blades with protective steel wire and keeping them taut, the protective steel wire can alleviate the impact force of falling coal and solve the problem of easy deformation of existing auxiliary agitator blades. At the same time, it avoids the need to add reinforcing ribs. The small diameter of the protective steel wire can reduce the agitation resistance and solve the problem of excessive agitation resistance of existing agitator shafts.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A variable-form circulating agitation mechanism includes a horizontally arranged agitation shaft and an agitation motor that drives the agitation shaft to rotate. Multiple main agitation blades that extend radially are installed on the agitation shaft. At the ends of the main agitation blades, auxiliary agitation blades that are arranged perpendicularly to them to expand the agitation range are connected. The core improvement is that multiple protective steel wires are wound along the length direction of the auxiliary agitation blades to completely surround them. The beginning and end of all the protective steel wires are fastened by fastening components installed on the side wall of the main agitation blades. After being fastened, all the protective steel wires are in a taut state.

[0007] By adopting the above scheme, the protective steel wire wraps around the auxiliary stirring blade with tension, forming an external rigid protective layer. This effectively disperses the impact force when coal falls and the lateral extrusion force when it accumulates. The impact energy of the coal is buffered and absorbed by the steel wire, while the steel wire restricts the deformation of the auxiliary stirring blade, significantly reducing the risk of deformation. Compared with the traditional design that adds reinforcing ribs, because the diameter of the protective steel wire is very small, the protective steel wire only wraps around the auxiliary stirring blade without increasing its additional contact area with the coal, thus avoiding the problem of a significant increase in stirring resistance caused by reinforcing ribs.

[0008] As a preferred embodiment of the anti-variable circulating agitation mechanism, multiple limiting grooves located on the same straight line are provided at the ends of the main agitator and the auxiliary agitator. All protective steel wires are confined within the limiting grooves. The limiting grooves precisely constrain the position of the protective steel wires, preventing the steel wires from shifting or loosening when the auxiliary agitator rotates, ensuring that the protective steel wires always uniformly wrap around the auxiliary agitator and maintain a stable tension protection effect; at the same time, it simplifies the installation and positioning process of the protective steel wires and improves assembly efficiency.

[0009] As a preferred embodiment of the anti-variable circulating agitation mechanism, the locking assembly includes a locking seat connected to the side wall of the main agitator. Multiple top screws are installed through the locking seat to lock the ends of the protective steel wire. The preload of the top screws can be adjusted by rotation to flexibly control the tension of the protective steel wire (adjusted according to the impact intensity of the coal). The connection structure between the locking seat and the main agitator is simple and reliable, and easy to maintain. If the protective steel wire needs to be replaced, it can be disassembled simply by loosening the top screws.

[0010] In a preferred embodiment of the anti-variable circulating agitation mechanism, a positioning screw is connected to the end of the main agitator blade furthest from the auxiliary agitator blade, extending into the agitator shaft. A positioning nut is installed on the positioning screw to fix the main agitator blade to the agitator shaft. The cooperation between the positioning screw and the positioning nut enables the detachable fixing of the main agitator blade, facilitating the individual replacement of a damaged main agitator blade or adjustment of the main agitator blade's installation angle (such as optimization of a spiral staggered distribution), without requiring the entire agitator shaft to be disassembled, thus reducing maintenance costs.

[0011] As a preferred embodiment of the anti-variable circulating agitation mechanism, all main agitators are evenly arrayed along the agitation shaft axis and are spirally staggered. The spiral staggered distribution causes the force exerted by each main agitator on the coal to have a spiral propulsion trend when the agitation shaft rotates. This can not only evenly loosen the coal in each area at the bottom of the coal bunker, but also form a directional thrust, further improving fluidity. The even array ensures the overall balance of the agitation force and avoids local overload.

[0012] The second technical problem to be solved by the present invention is to provide a high-flowability coal bunker equipped with an anti-deformation circulating agitator. The anti-deformation circulating agitator wraps the auxiliary stirring blades with protective steel wire and keeps them in a taut state. The protective steel wire can alleviate the impact force of falling coal and solve the problem of easy deformation of the existing auxiliary stirring blades in the coal bunker. At the same time, it avoids the need to add reinforcing ribs to the anti-deformation circulating agitator. The small diameter of the protective steel wire can reduce the agitation resistance and solve the problem of excessive agitation resistance of the existing agitator shaft in the coal bunker.

[0013] To achieve the above objectives, the present invention provides the following technical solution: A high-flowability coal bunker equipped with an anti-variable type circulating agitation mechanism includes a cylindrical bunker body and a conical bunker body connected to the bottom of the cylindrical bunker body. The entire cylindrical bunker body and the conical bunker body are suspended by a vertical support. A horizontally arranged discharge mechanism is installed at the bottom of the conical bunker body. The core improvement is that an anti-variable type circulating agitation mechanism is installed inside the conical bunker body, located directly above the discharge mechanism. The discharge mechanism and the anti-variable type circulating agitation mechanism are in the same direction and of equal length.

[0014] By adopting the above scheme, the agitator is placed directly above the discharge mechanism, which can specifically loosen the coal that is about to enter the discharge port. This area is most prone to blockage due to compaction. It works in conjunction with the discharge mechanism (agitation and loosening → continuous discharge) to ensure that the coal at the bottom of the coal bunker is always in a loose state, which greatly improves the overall discharge smoothness.

[0015] As a preferred embodiment of a high-flowability coal bunker equipped with an anti-variable circulating agitation mechanism, the discharge mechanism includes a transverse auger arranged horizontally and connected to the bottom of the conical bunker. A transverse discharge motor is installed at one end of the transverse auger to drive its rotation. The transverse auger pushes the coal to one side through spiral blades to achieve preliminary centralized conveying, which is suitable for coal collection in a wider area at the bottom of the conical bunker.

[0016] As a preferred embodiment of a high-flowability coal bunker equipped with an anti-variable circulating agitation mechanism, the discharge mechanism also includes a longitudinal auger arranged horizontally and connected vertically to the transverse auger. A longitudinal discharge motor is installed at one end of the longitudinal auger to drive its rotation, and a discharge port is provided at the other end of the longitudinal auger. The longitudinal auger further pushes the coal conveyed by the transverse auger towards the discharge port in a directional manner, forming a continuous and stable discharge process and avoiding coal accumulation at the discharge port. The combined design of the longitudinal and transverse augers is adaptable to different coal bunker layouts and has high flexibility.

[0017] As a preferred embodiment of a high-flowability coal bunker equipped with an anti-variable circulating agitation mechanism, the side of the conical bunker is equipped with a maintenance door that can be flipped open or closed. The maintenance door allows staff to regularly check the working status of the agitation mechanism (such as whether the protective steel wire is loose or whether the auxiliary agitator blades are worn), or to quickly disassemble and repair it in case of failure, without having to completely dismantle the coal bunker structure, thus improving the maintainability of the equipment.

[0018] The beneficial effects of this invention are: 1. Strong anti-deformation ability: The protective steel wire wraps around the auxiliary stirring blade with tension to form an external rigid protective layer, which can effectively disperse the impact force when coal falls and the lateral extrusion force when it accumulates. The impact energy of the coal will be buffered and absorbed by the steel wire. At the same time, the steel wire restricts the deformation of the auxiliary stirring blade, significantly reducing the risk of deformation of the auxiliary stirring blade. 2. Low stirring resistance: Compared with the traditional design with added reinforcing ribs, the protective steel wire has a very small diameter. The protective steel wire only wraps around the auxiliary stirring blade and does not increase its extra contact area with the coal, thus avoiding the problem of a significant increase in stirring resistance caused by reinforcing ribs. 3. Easy maintenance: The protective steel wire is tightened by the top screw and positioned by the limit groove, and the main agitator is fixed by the positioning nut, all of which support quick disassembly and assembly; the inspection door design facilitates regular inspection, and the overall maintenance cost is low. 4. Improved fluidity: The spirally staggered main stirring blades generate directional thrust, working in conjunction with the discharge mechanism to ensure that coal is loose and smooth throughout the entire process from storage to discharge, completely solving the problem of difficult discharge from the bottom of the coal bunker. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A three-dimensional diagram of the circulating agitator mechanism to prevent variations in its operating form; Figure 2 A three-dimensional view of the main stirring blade and auxiliary stirring blades as a whole; Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 A front view of the main and auxiliary stirring blades as a whole; Figure 5 A top view of the main and auxiliary stirring blades as a whole; Figure 6 A three-dimensional view of a high-flowability coal bunker equipped with an anti-variable type circulating agitation mechanism; Figure 7 A three-dimensional cone-shaped compartment Figure 1 ; Figure 8 A three-dimensional cone-shaped compartment Figure 2 ; Figure 9 This is a 3D view of the material discharge mechanism.

[0021] The markings in the diagram are: 1-Agitator shaft; 2-Agitator motor; 3-Main agitator blade; 4-Auxiliary agitator blade; 5-Protective steel wire; 6-Securing assembly; 61-Securing seat; 62-Top screw; 7-Limit groove; 8-Positioning screw; 9-Positioning nut; 10-Cylindrical silo; 11-Conical silo; 12-Vertical support; 13-Discharge mechanism; 131-Transverse auger; 132-Transverse discharge motor; 133-Vertical auger; 134-Vertical discharge motor; 135-Discharge port; 14-Inspection door. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figures 1 to 5As shown, a variable-form circulating agitation mechanism is provided, which is applied in a coal bunker. Specifically, it includes a horizontally arranged agitation shaft 1 and an agitation motor 2 that drives the agitation shaft 1 to rotate. Eight main agitation blades 3 that extend radially are installed on the agitation shaft 1. At the end of the main agitation blades 3, auxiliary agitation blades 4 are connected to them perpendicularly to expand the agitation range. Three protective steel wires 5 are wound along the length of the auxiliary agitation blades 4 to completely surround them. The first and last ends of all the protective steel wires 5 are fastened by fastening components 6 installed on the side wall of the main agitation blades 3. After being fastened, all the protective steel wires 5 are in a taut state. The protective steel wire 5 wraps around the auxiliary stirring blade 4 with tension, forming an external rigid protective layer. This effectively disperses the impact force when coal falls and the lateral extrusion force when it accumulates. The impact energy of the coal is buffered and absorbed by the steel wire, while the steel wire restricts the deformation of the auxiliary stirring blade 4, significantly reducing the risk of deformation of the auxiliary stirring blade 4. Compared with the traditional design that adds reinforcing ribs, because the diameter of the protective steel wire 5 is very small, the protective steel wire 5 only wraps around the auxiliary stirring blade 4 without increasing its additional contact area with the coal, thus avoiding the problem of a significant increase in stirring resistance caused by reinforcing ribs.

[0024] like Figures 4 to 5 As shown, three limiting grooves 7 located on the same straight line are provided at the end of the main stirring blade 3 and the end of the auxiliary stirring blade 4. All protective steel wires 5 are limited within the limiting grooves 7. The limiting grooves 7 precisely constrain the position of the protective steel wires 5 to prevent the steel wires from shifting or loosening when the auxiliary stirring blade 4 rotates, ensuring that the protective steel wires 5 always wrap the auxiliary stirring blade 4 evenly and maintain a stable tension protection effect. At the same time, it simplifies the installation and positioning process of the protective steel wires 5 and improves assembly efficiency.

[0025] like Figure 3 As shown, the fastening assembly 6 includes a fastening seat 61 connected to the side wall of the main stirring blade 3. Three top screws 62 are installed through the fastening seat 61 to fasten the ends of the protective steel wire 5. The preload of the top screws 62 can be adjusted by rotating to flexibly control the tension of the protective steel wire 5 (adjusted according to the coal impact intensity). The connection structure between the fastening seat 61 and the main stirring blade 3 is simple and reliable, and easy to maintain later. If the protective steel wire 5 needs to be replaced, it can be disassembled simply by loosening the top screws 62.

[0026] like Figures 4 to 5 As shown, the end of the main stirring blade 3 furthest from the auxiliary stirring blade 4 is connected to a positioning screw 8 that extends into the stirring shaft 1. A positioning nut 9 is installed on the positioning screw 8 to fix the main stirring blade 3 to the stirring shaft 1. The cooperation between the positioning screw 8 and the positioning nut 9 enables the main stirring blade 3 to be detachably fixed, facilitating the individual replacement of a damaged main stirring blade 3 or the adjustment of the installation angle of the main stirring blade 3 (such as optimization of the spiral staggered distribution), without the need to disassemble the entire stirring shaft 1, thus reducing maintenance costs.

[0027] like Figure 1As shown, all the main stirring blades 3 are evenly arrayed along the axial direction of the stirring shaft 1 and are distributed in a spiral staggered manner. The spiral staggered distribution makes the force of each main stirring blade 3 on the coal in a spiral propulsion trend when the stirring shaft 1 rotates. This can not only evenly loosen the coal in each area at the bottom of the coal bunker, but also form a directional thrust to further improve the fluidity. The uniform array ensures the overall balance of the stirring force and avoids local overload.

[0028] like Figures 6 to 8 As shown, a high-flow coal bunker equipped with an anti-variable circulating agitator is used for temporary coal storage, which is then transported to subsequent transportation stages (such as belt conveyors, mine cars, etc.) through the bottom discharge port. Specifically, it includes a cylindrical bunker body 10 and a conical bunker body 11 connected to the bottom of the cylindrical bunker body 10. The entire cylindrical bunker body 10 and conical bunker body 11 are suspended by a vertical support 12. A horizontally arranged discharge mechanism 13 is installed at the bottom of the conical bunker body 11. An anti-variable circulating agitator is installed inside the conical bunker body 11, located directly above the discharge mechanism 13. The discharge mechanism 13 and the anti-variable circulating agitator are aligned and of equal length. Placing the agitator directly above the discharge mechanism 13 allows for targeted loosening of the coal about to enter the discharge port, an area most prone to blockage due to compaction. Working in conjunction with the discharge mechanism 13 (agitation and loosening → continuous discharge), it ensures that the coal at the bottom of the bunker remains loose, significantly improving overall discharge flow.

[0029] like Figure 9 As shown, the discharge mechanism 13 includes a horizontally arranged auger 131 that communicates with the bottom of the conical silo 11. A horizontal discharge motor 132 is installed at one end of the horizontal auger 131 to drive its rotation. The horizontal auger 131 pushes the coal to one side through spiral blades, achieving initial centralized conveying, which is suitable for coal collection in the wider area at the bottom of the conical silo 11. The discharge mechanism 13 also includes a longitudinally arranged auger 133 that communicates vertically with the horizontal auger 131. A longitudinal discharge motor 134 is installed at one end of the longitudinal auger 133 to drive its rotation, and a discharge port 135 is provided at the other end of the longitudinal auger 133. The longitudinal auger 133 further pushes the coal conveyed by the horizontal auger 131 towards the discharge port 135 in a directional manner, forming a continuous and stable discharge process and avoiding coal accumulation at the discharge port. The combined design of the longitudinal and horizontal augers 131 is adaptable to different coal silo layouts and offers high flexibility.

[0030] like Figures 7 to 8 As shown, the side of the conical silo 11 is equipped with a maintenance door 14 that can be flipped open or closed. The maintenance door 14 makes it convenient for staff to regularly check the working status of the stirring mechanism (such as whether the protective steel wire 5 is loose or whether the auxiliary stirring blade 4 is worn), or to quickly disassemble and repair it in case of failure, without having to completely dismantle the coal silo structure, thus improving the maintainability of the equipment.

[0031] The working principle of this high-flowability coal bunker equipped with an anti-variable circulating agitation mechanism: Agitation process: The agitator motor 2 drives the agitator shaft 1 to rotate, which in turn drives the main agitator blade 3 and the auxiliary agitator blade 4 to rotate synchronously; the main agitator blade 3 pushes the coal to flow, and the auxiliary agitator blade 4 further loosens the surrounding coal by vertical expansion; the protective steel wire 5 remains taut during rotation, dispersing the impact and compression of the coal on the auxiliary agitator blade 4. The impact energy of the coal is buffered and absorbed by the steel wire, while the steel wire restricts the deformation of the auxiliary agitator blade 4, significantly reducing the risk of deformation of the auxiliary agitator blade 4; Discharge coordination: The loosened coal falls to the bottom of the conical bin 11, the horizontal auger 131 pushes the coal to one side, and the vertical auger 133 then conveys the coal to the discharge port 135, forming a continuous discharge process. Maintenance operation: The condition of the protective steel wire 5 (such as whether it is loose) can be checked through the inspection door 14. If necessary, the tension can be adjusted by loosening the top screw 62. If the auxiliary stirring blade 4 or the main stirring blade 3 is damaged, the corresponding parts can be replaced by removing the positioning nut 9 or the top screw 62 without disassembling the whole.

[0032] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A variable-form circulating agitation mechanism, comprising a horizontally arranged agitation shaft and an agitation motor for driving the agitation shaft to rotate, wherein multiple main agitation blades extending radially are mounted on the agitation shaft, and auxiliary agitation blades arranged perpendicularly to the main agitation blades are connected to the ends of the main agitation blades to expand the agitation range; characterized in that, Multiple protective steel wires are wound along the length of the auxiliary stirring blade to completely surround it. The beginning and end of all the protective steel wires are fastened by fastening components installed on the side wall of the main stirring blade. All the protective steel wires are in a taut state after being fastened.

2. The anti-variable circulating agitation mechanism according to claim 1, characterized in that, Multiple limiting grooves located on the same straight line are provided at the ends of the main stirring blade and the auxiliary stirring blade, and all protective steel wires are limited within the limiting grooves.

3. The anti-variable circulating agitation mechanism according to claim 1, characterized in that, The fastening assembly includes a fastening seat connected to the side wall of the main agitator blade, and multiple set screws for fastening the ends of the protective steel wire are installed through the fastening seat.

4. The anti-variable circulating agitation mechanism according to claim 1, characterized in that, The main stirring blade is connected to a positioning screw that extends into the stirring shaft at the end furthest from the auxiliary stirring blade, and a positioning nut is installed on the positioning screw to fix the main stirring blade to the stirring shaft.

5. The anti-variable circulating agitation mechanism according to claim 1, characterized in that, All the main blades are evenly arrayed along the stirring axis and are distributed in a spiral staggered manner.

6. A high-flowability coal bunker equipped with an anti-variable circulating agitation mechanism, comprising a cylindrical bunker body and a conical bunker body connected to the bottom of the cylindrical bunker body, the entire cylindrical bunker body and the conical bunker body being suspended by a vertical support, and a horizontally arranged discharge mechanism installed at the bottom of the conical bunker body, characterized in that, An anti-variable circulating agitation mechanism, as described in any one of claims 1-5, is installed inside the conical silo and is located directly above the discharge mechanism, wherein the discharge mechanism and the anti-variable circulating agitation mechanism are in the same direction and of equal length.

7. The high-flowability coal bunker equipped with an anti-variable type circulating agitation mechanism according to claim 6, characterized in that, The discharge mechanism includes a horizontally arranged auger that communicates with the bottom of the conical hopper, and a horizontal discharge motor that drives the auger to rotate is installed at one end of the auger.

8. The high-flowability coal bunker equipped with an anti-variable type circulating agitation mechanism according to claim 7, characterized in that, The discharge mechanism also includes a longitudinal auger that is arranged horizontally and connected vertically to the transverse auger. A longitudinal discharge motor that drives the longitudinal auger to rotate is installed at one end of the longitudinal auger, and a discharge port is provided at the other end of the longitudinal auger.

9. The high-flowability coal bunker equipped with an anti-variable type circulating agitation mechanism according to claim 6, characterized in that, The conical compartment is equipped with a maintenance door on its side that can be flipped open or closed.

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