Anti-blocking coal hopper device and anti-blocking coal bunker system

Abstract

The utility model discloses a kind of anti-blocking coal bucket device and anti-blocking coal bunker system, the anti-blocking coal bucket device includes integrated anti-blocking coal bucket and the bunker wall vibration hammer of being set in coal bucket outside, the coal bucket includes: blanking section, receives raw coal particle in raw coal bunker downward conveying;Discharge section, with the outlet end of the blanking section is connected, and raw coal particle is sent into coal feeder;The blanking section includes several sections of circular table structure connected in turn, the diameter of the upper end of the circular table structure is greater than its lower end diameter, the included angle between the side wall of each circular table structure and its cross section increases in turn from top to bottom;The bunker wall vibration hammer is relatively horizontal plane and is set to be inclined upwards.The utility model in this way, the blanking section of coal bucket is connected by multiple circular table structures, forms approximate curved surface, by the inclination angle design of each circular table structure side wall, raw coal is more easily fallen, reduces the risk of jam, bunker wall vibration hammer can be inclined and upwardly shake coal bucket to help dredge, avoid raw coal compaction in shaking process.

Description

Technical Field

[0001] This utility model belongs to the technical field of coal conveying equipment, specifically, it relates to an anti-blocking coal hopper device and an anti-blocking coal bunker system. Background Technology

[0002] In recent years, coal costs have accounted for more than 70% of the total power generation costs of thermal power plants, and this proportion has remained high due to persistently high coal prices. As a result, most thermal power plants have adopted coal blending technology to reduce operating costs. Current technology typically involves transporting coal from the raw coal bunker to a coal feeder, which then feeds it into the pulverizing system.

[0003] Currently, the urgent problems to be solved in boiler fuel transportation include the following aspects: 1. Under deep-heating conditions, there is a risk of fire extinguishing due to coal feeder interruption; 2. Coal feeder interruption severely restricts the unit's ability to handle high loads; 3. The risk of instantaneous excessive emissions of pollutants after fire extinguishing due to coal interruption; 4. Combustion deviation from design values ​​caused by operating multiple pulverizing systems to ensure that coal interruption does not occur; 5. From an economic point of view, it is necessary to purchase high-priced, high-quality coal to avoid or reduce the risk of coal interruption.

[0004] Therefore, in view of the constraints of fuel on the safe, environmental and economic operation of the unit and the long-term development needs of thermal power units, improving the equipment itself that supplies raw coal to the coal feeder to reduce or even avoid coal shortages is the key to avoiding the above problems.

[0005] In existing technologies, most raw coal hoppers with a gradually narrowing cross-section from top to bottom are used to transport raw coal particles from the raw coal bunker to the coal feeder. To clear blockages caused by raw coal particles, one solution is to vibrate the raw coal hopper from the outside, using impact force to achieve a clearing effect. However, in practical applications, it has been found that when the vibration direction or the distribution of multiple vibration positions is unreasonable, especially in the area near the raw coal hopper outlet, it is easier to compact the raw coal particles, exacerbating the blockage.

[0006] In view of the above, this utility model is hereby proposed. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art. The first aspect is to provide a coal hopper anti-blocking device, which can more effectively use the vibration effect of pounding the outer wall of the coal hopper to clear the coal slick, avoid local raw coal particles being vibrated and compacted, and thus more reliably prevent coal shortage failure.

[0008] The second aspect of this utility model provides an anti-clogging coal hopper device, which can enhance the structural strength of the area of ​​the coal hopper being pounded, prevent damage to the coal hopper, and at the same time avoid weakening the effect of pounding the coal hopper to clear raw coal particles.

[0009] The third aspect of this utility model provides an anti-blocking coal hopper system with the above-mentioned anti-blocking coal hopper device, which ensures continuous and regular coal flow output without spilling coal.

[0010] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0011] A coal hopper anti-clogging device includes an integrated anti-clogging coal hopper and a wall-vibrating hammer disposed on the outside of the coal hopper, wherein the coal hopper comprises:

[0012] The feeding section receives raw coal particles from the raw coal bunker and conveys them downwards.

[0013] The discharge section is located below the feeding section, and its inlet end is connected to the outlet end of the feeding section. It is used to feed raw coal particles into the coal feeder.

[0014] The feeding section includes several frustum structures connected in sequence. The upper diameter of the frustum structure is larger than its lower diameter, and the angle between the side wall of each frustum structure and its cross-section increases from top to bottom.

[0015] In the feeding section, at least some of the sequentially connected frustum structures are equipped with bin wall vibrating hammers on their outer sides, and the bin wall vibrating hammers on the outer sides of two adjacent frustum structures are staggered at a certain angle in the circumference of the coal hopper.

[0016] The outer side of the discharge section is also equipped with a bin wall vibrating hammer;

[0017] The bin wall vibrating hammers on the outer sides of the feeding section and the discharge section are all inclined upward relative to the horizontal plane, so that the end of the bin wall vibrating hammer near the coal hopper is higher than the other end of the bin wall vibrating hammer.

[0018] The tilt angle of the vibrating hammer on the outer side of the discharge section relative to the horizontal plane is smaller than the tilt angle of the vibrating hammer on the outer side of the unloading section relative to the horizontal plane.

[0019] Furthermore, the inclination angle of each set of bin wall vibrating hammers on the outer side of the feeding section relative to the horizontal plane decreases sequentially from top to bottom; the extension direction of the bin wall vibrating hammers is perpendicular or substantially perpendicular to the side wall of their corresponding frustum structure.

[0020] Furthermore, the hammerhead of the bin wall vibrating hammer is located at one end near the coal hopper; the hammerhead is arranged to reciprocate in a direction inclined relative to the horizontal plane, and moves in an upward direction to strike the feeding section or the discharge section.

[0021] Furthermore, the feeding section has 8 to 10 frustum structures; wherein, the height of the first and second frustum structures from bottom to top is H1, and the height of the remaining frustum structures is H2, and H1 > H2;

[0022] The material feeding section has at least three sequentially connected frustum structures from the bottom to the outside of each of the three sections. The frustum structure at the bottom of the material feeding section is spirally distributed around the outer periphery of the material feeding section.

[0023] The bin wall vibrating hammer is not installed on the outer side of the other frustum structures in the feeding section; wherein, the number of frustum structures with the bin wall vibrating hammer is less than or equal to the number of frustum structures without the bin wall vibrating hammer; the included angle between the side wall and the cross-section of the frustum structure with the bin wall vibrating hammer is greater than or equal to 75°.

[0024] Furthermore, two sets of opposing bin wall vibratory hammers are provided on the outer side of the discharge section.

[0025] A set of bin wall vibrating air hammers is installed on the outer side of the first to fourth truncated cone structures from bottom to top in the feeding section. The bin wall vibrating air hammers of adjacent truncated cone structures are staggered 180° circumferentially.

[0026] Furthermore, the discharge section includes an upper discharge section and a lower discharge section, both of which are frustum-shaped cylinders that are larger at the top and smaller at the bottom; the height of the upper discharge section is H3, the height of the lower discharge section is H4, and H1 > H4 > H2 > H3;

[0027] The discharge section is equipped with a bidirectional pneumatic slide gate located between the upper discharge section and the lower discharge section. A bin wall vibrating hammer located outside the discharge section is installed on the lower side of the bidirectional pneumatic slide gate and above the inlet of the coal feeder.

[0028] Furthermore, a reinforced protective plate is fixedly installed on the outer wall of the coal hopper corresponding to the striking position of the bin wall vibratory hammer.

[0029] Furthermore, the reinforced protective plate includes:

[0030] The main body of the protective plate is set perpendicular to the normal line of the outer wall of the coal hopper and is spaced apart from the outer wall of the coal hopper. The minimum distance between the main body of the protective plate and the outer wall of the coal hopper is 10±2mm.

[0031] Connecting ribs are arranged around the outer periphery of the protective plate body and are respectively connected to the outer wall of the protective plate body and the coal hopper;

[0032] The protective plate body, the connecting ribs, and the outer wall of the coal hopper together form a cavity, and the bin wall vibrating hammer is positioned towards the protective plate body.

[0033] A coal bunker anti-blocking system includes a raw coal bunker and a coal feeder, as well as the aforementioned coal hopper anti-blocking device;

[0034] The upper opening of the feeding section is connected to the feeding outlet of the raw coal bunker to receive raw coal particles from the raw coal bunker; the lower opening of the discharging section is connected to the inlet of the coal feeder to feed the raw coal particles into the coal feeder.

[0035] The feeder inlet is equipped with baffles located on both sides of the feeder belt for coal flow shaping.

[0036] Furthermore, the anti-blocking coal bunker system is equipped with a coal cut-off signal acquisition device and a pneumatic hammer action indicator light. The coal cut-off signal acquisition device, the bunker wall vibrating pneumatic hammer, and the pneumatic hammer action indicator light are electrically connected to the control module of the anti-blocking coal bunker system.

[0037] The activation state of the bin wall vibrating hammer corresponds to the lit state of the hammer action indicator light, and the deactivation state of the bin wall vibrating hammer corresponds to the deactivation state of the hammer action indicator light; or, the activation and deactivation states of the bin wall vibrating hammer correspond to different colors displayed on the hammer action indicator light.

[0038] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art.

[0039] 1. It can ensure a continuous and reliable supply of raw coal, effectively preventing coal shortages, thus enabling the boiler to use low-calorific-value, high-viscosity coal, saving fuel costs, while ensuring fuel supply when the unit is under heavy load, reducing the problem of the unit being unable to operate under heavy load;

[0040] 2. The feeding section of the coal hopper is composed of multiple frustum structures connected end to end. By designing the inclination angle and height of the side walls of each frustum structure, the sliding repose angle changes continuously during the flow of raw coal, which is conducive to the smooth falling of raw coal particles, prevents blockage, reduces the labor force for controlling coal blockage, and fundamentally solves the personal safety risks caused by coal blockage.

[0041] 3. The bin wall vibrating hammers correspond one-to-one with the truncated cone structure to avoid concentrated vibration and compression of raw coal at the same height position. Combined with the upward tilting setting of the bin wall vibrating hammers, the raw coal particles can be loosened upward first and then fall down along the direction of gravity, effectively avoiding the particle compaction problem caused by vertical vibration.

[0042] 4. The bin wall vibrating hammers are distributed in a spiral upward arrangement within a certain height range from the bottom of the feeding section, ensuring more comprehensive coverage of the cross-sectional position of the small diameter height area of ​​the coal hopper. The bin wall vibrating hammers are not set in a certain height range at the top, which can prevent secondary accumulation of particles caused by excessive vibration. Combined with the specific range of the included angle between the side wall of the frustum structure with bin wall vibrating hammers and the cross-section, the raw coal particles subjected to vibration are easier to slide, which can achieve efficient unblocking effect.

[0043] 5. The reinforced protective plate forms a local cavity with the outer wall of the coal hopper. When the hopper wall vibrating hammer is working, the hollow effect formed by the local cavity can amplify the excitation force. While avoiding the damage that may be caused by the hopper wall vibrating hammer directly hitting the outer wall of the coal hopper, it also prevents the reinforced protective plate from significantly weakening the effect of the hopper wall vibrating hammer, thus ensuring the efficient unblocking effect of the hopper wall vibrating hammer.

[0044] 6. Due to the reduction of coal shortage events, fewer pulverizing systems are required to maintain stable combustion during deep peak shaving operation of the unit. This not only saves plant power but also greatly improves the performance of pulverized coal combustion and optimizes the combustion dynamic field and temperature field.

[0045] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0046] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0047] Figure 1 This is a schematic diagram of the anti-blocking coal hopper device and coal feeder in the embodiments of this utility model;

[0048] Figure 2 This is an enlarged schematic diagram of the coal hopper in this embodiment of the present invention, showing the installation of the reinforced protective plate and the hopper wall vibrating hammer.

[0049] In the diagram: 100, coal hopper; 110, feeding section; 111, truncated cone structure; 120, discharge section; 121, upper discharge section; 122, lower discharge section; 130, bin wall vibratory hammer; 131, reinforced protective plate; 1311, main body of protective plate; 1312, connecting ribs; 1313, cavity; 140, two-way pneumatic slide gate; 150, manhole door; 200, coal feeder.

[0050] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0052] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0053] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0054] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides an anti-blocking coal hopper device and an anti-blocking coal bunker system having the anti-blocking coal hopper device.

[0055] Specifically, the anti-blocking coal bunker system includes a raw coal bunker (not shown in the figure) and a coal feeder 200. The anti-blocking coal hopper device includes an integrated anti-blocking coal hopper 100, which is a funnel-shaped hopper that is larger at the top and smaller at the bottom. The upper end of the coal hopper 100 is connected to the raw coal bunker, and the lower end is connected to the coal feeder 200, thereby feeding the raw coal particles in the raw coal bunker into the coal feeder 200 for conveying.

[0056] In this embodiment, the coal hopper 100 has a feeding section 110 and a discharge section 120 connected to the outlet end (i.e., the lower end) of the feeding section 110. The upper opening of the feeding section 110 is connected to the feeding outlet of the raw coal bunker to receive raw coal particles from the bunker. The lower opening of the discharge section 120 is connected to the inlet of the coal feeder 200, thereby feeding raw coal particles along the coal hopper 100 into the coal feeder 200.

[0057] The feeding section 110 of the coal hopper 100 is composed of several sequentially connected frustum structures 111. The upper diameter of each frustum structure 111 is larger than its lower diameter, and adjacent frustum structures 111 have the same diameter at the connection point. The angle between the sidewall of each frustum structure 111 and its cross-section (equivalent to the horizontal plane) increases from top to bottom, so that the sidewall of the feeding section 110 forms an approximately curved surface structure.

[0058] In the above scheme, by designing the height and side wall inclination angle of each section of the frustum structure 111 constituting the feeding section 110, the overall structure of the feeding section 110 is more in line with the flowability of raw coal particles. During the flow of raw coal, the sliding angle of repose changes continuously, making it easier to fall and less likely to accumulate, thereby preventing the occurrence of coal shortage events.

[0059] Furthermore, the anti-blocking coal hopper device in this embodiment also includes a wall-vibrating hammer 130 installed on the outside of the coal hopper 100. When a coal blockage occurs, the wall-vibrating hammer 130 can vibrate by striking the outer wall of the coal hopper 100 to achieve a rapid and effective unblocking effect.

[0060] Specifically, in this embodiment, silo wall vibrating hammers 130 are respectively provided on the outer side of the feeding section 110 and the outer side of the discharge section 120. The silo wall vibrating hammers 130 use compressed air as power and can drive the hammers to strike the outer wall of the coal hopper 100 to generate vibration when coal blockage occurs, thereby achieving a fast and effective unblocking effect.

[0061] In the unloading section 110, at least some of the sequentially connected frustum structures 111 are equipped with corresponding bin wall vibrating hammers 130 on their outer sides, and two adjacent sets of bin wall vibrating hammers 130 are staggered at a certain angle in the circumferential direction. That is to say, each frustum structure 111 in the unloading section 110 is equipped with at most one set of bin wall vibrating hammers 130 on its outer side.

[0062] Using the above scheme, multiple sets of bin wall vibratory hammers 130 are distributed at different heights around the outer perimeter of the feeding section 110, rather than being placed at the same height. This avoids the problem of raw coal particles being compacted by vibration within a local height range, which could worsen the blockage. The multiple sets of bin wall vibratory hammers 130 have staggered angles along the circumference, allowing for more comprehensive coverage of the circumferential area and more reliable unblocking results.

[0063] The outer side of the discharge section 120 is also equipped with a bin wall vibrating hammer 130 to facilitate the unblocking of the outlet area of ​​the coal hopper 100 and avoid the blockage of the outlet leading to coal shortage.

[0064] In a further embodiment, the vibratory hammers 130 on the outer sides of the feeding section 110 and the discharge section 120 are both inclined upwards relative to the horizontal plane, so that the end of the vibratory hammer 130 near the coal hopper 100 is higher than the other end of the vibratory hammer 130. The inclination angle of the vibratory hammer 130 on the outer side of the discharge section 120 relative to the horizontal plane is smaller than the inclination angle of the vibratory hammer 130 on the outer side of the feeding section 110 relative to the horizontal plane.

[0065] In this embodiment, the above-mentioned scheme is adopted. The feeding section 110 forms an approximately curved surface through a multi-section frustum structure 111, which enhances the guiding nature of the falling raw coal. The upper part is slow and anti-impact accumulation, while the lower part is accelerated to promote sliding. At the same time, the dead corners of the traditional coal hopper are eliminated, and the raw coal is always in a dynamic sliding state. This facilitates the uniform transmission of the vibration energy of the bin wall vibrating hammer 130 to drive the movement of raw coal particles and avoids the vibration energy acting on the static accumulation layer, causing compaction.

[0066] The bin wall vibratory hammers 130 correspond one-to-one with the frustum structure 111, arranged in layers to avoid concentrated energy compression of the raw coal. The staggered arrangement in the upper and lower circumferential directions disperses and transmits vibration waves, causing the raw coal particles to be disturbed in multiple directions and break down their adhesion, rather than being compressed and piled up in one direction. At least two sets of bin wall vibratory hammers 130 in the discharge section 120 enhance the unblocking of the outlet, while avoiding excessive energy concentration and compaction in narrow areas.

[0067] The 130 vibratory hammer on the silo wall is tilted upwards, directing the vibration energy upwards. This causes the raw coal particles to first loosen slightly upwards along the inner wall of the coal hopper 100 before falling downwards due to gravity, rather than being directly compressed downwards. This "loosening-falling" action effectively avoids the particle compaction problem caused by vertical vibration. The feeding section 110 has a thicker accumulation of raw coal particles, so a larger tilt angle is used to enhance the "loosening" effect of the vibration, allowing even deeper layers of raw coal to be disturbed. The discharge section 120 has a narrow space and denser raw coal particles, so a smaller tilt angle is used to avoid excessive vibration amplitude that could cause raw coal particles to splash and clog the outlet area, while ensuring that the vibration energy is precisely applied to the outlet area for gentle unblocking.

[0068] In a further embodiment, the inclination angles of the bin wall vibrating hammers 130 on the outer side of the unloading section 110 relative to the horizontal plane decrease sequentially from top to bottom. The extension direction of the bin wall vibrating hammers 130 is perpendicular or substantially perpendicular to the side wall of their corresponding frustum structure 111. Specifically, "substantially perpendicular" means that the angle between the extension direction of the bin wall vibrating hammers 130 and the side wall of their corresponding frustum structure 111 is controlled between 88° and 92°.

[0069] In the above scheme, the included angle of the side wall of the frustum structure 111 of the feeding section 110 is smaller at the top and larger at the bottom. The tilt angle of the bin wall vibratory hammer 130 gradually changes in the opposite direction and its extension direction is perpendicular to the side wall. This allows the upper bin wall vibratory hammer 130 to forcefully loosen the thick layer of raw coal with a large tilt angle, while the vibration energy of the lower bin wall vibratory hammer 130 is aligned with the particle sliding direction to avoid secondary accumulation. The layered and staggered arrangement of the bin wall vibratory hammer 130, combined with the differentiated tilt angle, allows the vibration energy to be distributed and transmitted. The vertical vibration design maximizes energy utilization, directly breaking the adhesion between raw coal particles and the inner wall of the coal hopper 100 and the particle bridging structure. There is no radial extrusion force, eliminating the risk of vibration compaction.

[0070] In one specific implementation, the hammerhead of the bin wall vibrating hammer 130 is located at one end near the coal hopper 100. The hammerhead is reciprocating along the extension direction of the bin wall vibrating hammer 130, that is, in a direction inclined relative to the horizontal plane. When the hammerhead moves towards the coal hopper 100, it moves in an upward inclined direction and strikes the outer wall of the feeding section 110 or the discharge section 120.

[0071] The direction of the hammer's movement determines the direction of its impact force when it strikes the outer wall of the feeding section 110 or the discharge section 120. By adopting the above structure, it can be ensured that the coal hopper 100 is subjected to an upward impact force, thereby achieving a dredging method that loosens the raw coal particles first and then makes them fall, ensuring the dredging effect and preventing vibration compaction.

[0072] In a further embodiment, the height of at least two frustum structures 111 extending upwards from the bottom of the unloading section 110 is greater than the height of the frustum structure 111 at the top of the unloading section 110.

[0073] Furthermore, the feeding section 110 of the coal hopper 100 has 8 to 10 sections of frustum structure 111. Among them, the height of the first and second sections of frustum structure 111 from bottom to top is H1, and the height of the remaining sections of frustum structure 111 is H2, and H1 > H2.

[0074] In one specific implementation, the feeding section 110 is provided with 8 frustum structures 111. The height of the first and second frustum structures 111 from bottom to top is equal, with a height H1 of 750±50mm. The height of the third to eighth frustum structures 111 is also equal, with a height H2 of 650±50mm.

[0075] In a further embodiment, the angle between the side wall of the uppermost frustum structure 111 of the feeding section 110 and its cross-section is 70°±5°, and the angle between the side wall of the lowermost frustum structure 111 and its cross-section is 80°±5°.

[0076] In one specific embodiment, the feeding section 110 has eight frustum structures 111 connected in sequence. The angles between the sidewalls of each frustum structure 111 and its cross-section are denoted as α1 to α8 from top to bottom, and satisfy: α1 < α2 < α3 < α4 < α5 < α6 < α7 < α8.

[0077] In one specific structure, the included angles α1 to α8 described above satisfy:

[0078] tanα1=2.74±0.005;

[0079] tanα² = 2.75 ± 0.005;

[0080] tanα3=2.86±0.005;

[0081] tanα4=3.22±0.005;

[0082] tanα5=3.66±0.005;

[0083] tanα6=4.28±0.005;

[0084] tanα7=5.12±0.005;

[0085] tanα8=6.48±0.005.

[0086] In a further embodiment, the discharge section 120 includes an upper discharge section 121 and a lower discharge section 122, both of which are frustoconical cylinders that are larger at the top and smaller at the bottom. The lower end of the upper discharge section 121 and the upper end of the lower discharge section 122 are substantially the same size.

[0087] More specifically, the height of the upper discharge section 121 is H3, and the height of the lower discharge section 122 is H4, where H4 > H3.

[0088] In one specific embodiment, the heights H1 to H4 satisfy the following condition: H3 < H2 < H4 < H1.

[0089] In one specific implementation, the height H3 of the upper discharge section 121 is 450±50mm, and the height H4 of the lower discharge section 122 is 660±50mm.

[0090] In one specific structure of this embodiment, there is a height difference H of 6500±500mm between the discharge outlet of the raw coal bunker and the inlet of the coal feeder 200. The coal hopper 100 is installed in the space formed by this height difference. The coal hopper 100 is made of tensile and wear-resistant stainless steel CJ1L / BN1G / 201 with a wall thickness of 10±0.5mm. The coal hopper 100 has a discharge section 110 composed of 8 frustum structures 111 and a discharge section 120 composed of two frustum-shaped cylinders, for a total of 10 sections.

[0091] The upper opening of the coal hopper 100 is connected to the discharge outlet of the raw coal bunker, and the lower opening is connected to the inlet of the coal feeder 200, for example, it can be inserted into the inlet of the coal feeder 200. The size of the lower opening of the coal hopper 100 is designed according to the belt width of the coal feeder 200, so that the raw coal particles discharged from the discharge section 120 of the coal hopper 100 all fall on the belt of the coal feeder 200, without spilling coal.

[0092] In one specific embodiment, the upper opening diameter of the coal hopper 100 is 3900±50mm, and the lower opening diameter is 650±50mm.

[0093] In a more specific structure, from top to bottom, the lower opening diameters of the frustum structures 111 in the feeding section 110 are 3400±50mm, 2900±50mm, 2400±50mm, 2000±50mm, 1700±50mm, 1300±50mm, and 800±50mm, respectively. It can be understood that the upper opening diameter of each frustum structure 111 matches the lower opening diameter of the frustum structure 111 above it.

[0094] The aforementioned frustum structures 111 are welded together, and the joints between adjacent frustum structures 111 are flat, with all welds smoothly transitioning to eliminate the initial growth conditions of raw coal blockage.

[0095] More specifically, the upper discharge section 121 of the feeding section 110 and the discharge section 120 are also connected by welding. Similarly, the upper discharge section 121 and the lower discharge section 122 are also connected by welding. Furthermore, the joints are flat and the welds are smoothly transitioned.

[0096] In one specific embodiment of this invention, utilizing the discrete characteristics of hard, viscous bulk fluid particles, and based on research into the flow regime, elasticity, plasticity, viscosity, deformation level, sliding, expansion, and flowability changes of complex raw coal particles, the influence of moisture, viscosity, pressure, and kinetic energy on the flowability of raw coal particles is analyzed. Combined with relevant parameters of the belt feeder 200 and actual application data, computer simulation analysis is performed to optimize the contraction rate of each section of the coal hopper 100, the angle between the sidewall and the horizontal plane, and the height of each section of the frustum structure 111. This ensures that the sliding repose angle continuously changes during the flow of raw coal, guaranteeing that any section of the coal hopper 100 satisfies the optimal solution for raw coal descent. In this way, the smooth descent of raw coal can be guaranteed to the greatest extent possible, preventing coal blockage events.

[0097] In a further embodiment, in the blanking section 110, a clamp is installed at least at the weld between the two adjacent frustum structures 111 at the uppermost end. Specifically, for the blanking section 110 with eight frustum structures 111, clamps are fitted around the welds of the seventh and eighth frustum structures 111 from bottom to top.

[0098] Since the seventh and eighth truncated cone structures 111 are the largest in size, meaning the weld between them has the largest circumferential radius, adding clamps can increase the strength of the coal hopper 100 and ensure safe and reliable operation.

[0099] Preferably, clamps are also fitted around the weld seams of the sixth and seventh frustum structures 111 from bottom to top, which can further increase the strength of the coal hopper 100.

[0100] In a more specific structure, reinforcing ribs are uniformly welded at the upper connection of the feeding section 110. The welding is required to be firm, which can further ensure the structural strength and improve safety and reliability.

[0101] In a further embodiment, the discharge section 120 is equipped with a bidirectional pneumatic slide gate 140, which is located at a certain distance from the inlet of the coal feeder 200. The door panel of the bidirectional pneumatic slide gate 140 is made of stainless steel CJ1L / BN1G / 201, the slide plate thickness is 15±0.5mm, and the rated thrust is ≥3T.

[0102] The bidirectional pneumatic slide gate 140 is a plug-in pneumatic structure that serves as a partition door between the raw coal bunker and the coal feeder 200 on the coal hopper 100. When it is fully open, there are no steps on the inner wall surface of the coal hopper 100, eliminating the conditions for raw coal to stick and clog near the bidirectional pneumatic slide gate 140.

[0103] In a further embodiment, the unloading section 110 has at least three sequentially connected frustum structures 111 arranged from bottom to top, each with a bin wall vibrating hammer 130 on its outer side. The bin wall vibrating hammers 130 are spirally distributed around the outer perimeter of the unloading section 110, starting from the lowest frustum structure 111. No bin wall vibrating hammers 130 are provided on the outer sides of the other frustum structures 111 of the unloading section 110.

[0104] In the above scheme, the bin wall vibrating hammers 130 are continuously distributed along the height direction from the lower end of the unloading section 110 upwards within a certain range, without any bin wall vibrating hammers 130 spaced apart by one or more frustum structures 111. After reaching a certain height, the upper frustum structures 111 are not equipped with bin wall vibrating hammers 130. The spiral arrangement of the bin wall vibrating hammers 130 along the circumferential direction ensures more comprehensive coverage of the cross-sectional position of the small-diameter height area of ​​the coal hopper 100, resulting in a more reliable unblocking effect.

[0105] With the above structure, the first and second frustum structures 111 at the lower end of the feeding section 110 have greater height, which can adapt to the tendency of the lower end to clog and enhance the structural guidance of the lower area. The bin wall vibrating hammer 130 covers at least three frustum structures 111 from the lower end of the feeding section 110 upwards, covering the two frustum structures 111 with greater height at the lower end and at least one adjacent frustum structure 111 in a spiral upward manner. The vibration energy is evenly transmitted along the circumference of the coal hopper 100, which not only continuously loosens the lower area where clogging is prone to occur, but also avoids local energy concentration and compaction of raw coal. At the same time, the upper frustum structure 111 does not have the bin wall vibrating hammer 130, which can prevent secondary accumulation of particles caused by excessive vibration and ensure the stable downward flow of raw coal.

[0106] Furthermore, the number of frustum structures 111 equipped with bin wall vibrating hammers 130 is less than or equal to the number of frustum structures 111 without bin wall vibrating hammers 130. In this way, the bin wall vibrating hammers 130 only act on the high-blockage area at the lower end of the feeding section 110, and transmit uniform vibration in a spiral continuous arrangement to quickly break up bridging.

[0107] In one specific implementation, the angle between the side wall of each section of the frustum structure 111 in the feeding section 110 and the horizontal plane gradually increases from about 70° to about 82° from top to bottom, and the angle between the side wall of the frustum structure 111 equipped with the bin wall vibrating hammer 130 and its cross-section is greater than or equal to 75°.

[0108] By analyzing the effects of factors such as moisture, viscosity, pressure, and kinetic energy on the flowability of raw coal particles, and combining this with computer simulation calculations, it was found that the frustum structure 111 with an angle greater than or equal to 75° between the sidewall and the cross-section has strong guiding properties, making it easier for raw coal to slide. Combined with the spirally continuous arrangement of the bin wall vibrating hammers 130, the vibration energy generated during hammering can efficiently break up particle bridging. Conversely, the frustum structure 111 with a smaller angle between the sidewall and the cross-section does not have the bin wall vibrating hammers 130 arranged on its outer side to avoid over-vibration. This overall effect of "structural guidance + precise vibration" ensures the smooth flow of raw coal.

[0109] In one specific embodiment, a total of six sets of bin wall vibrating air hammers 130 are provided, two of which are located on the outside of the discharge section 120 and the other four are located on the outside of the unloading section 110.

[0110] More specifically, two sets of bin wall vibrating hammers 130 on the outer side of the discharge section 120 are installed on the lower side of the bidirectional pneumatic slide gate 140 and above the inlet of the coal feeder 200, arranged in opposite directions. The other four sets of bin wall vibrating hammers 130 are respectively set on the outer periphery of the first to fourth truncated cone structures 111 of the discharge section 110 from bottom to top, with the bin wall vibrating hammers 130 on the outer periphery of adjacent truncated cone structures 111 staggered 180° circumferentially.

[0111] In the above scheme, the two sets of bin wall vibrating hammers 130 on the outer side of the discharge section 120 are equivalent to being set on the outer side of the lower discharge section 122. The lower discharge section 122 is a frustum-shaped cylinder, so the side wall of the lower discharge section 122 also has a certain angle of inclination relative to the vertical direction. Setting the bin wall vibrating hammers 130 on the outer side of the discharge section 120 at an upward inclination relative to the horizontal plane can make the impact force of the bin wall vibrating hammers 130 on the discharge section 120 basically perpendicular to the side wall of the discharge section 120, resulting in a better unblocking effect.

[0112] The solution in this embodiment can effectively solve the problem of coal blockage at both low and high positions. In the preferred embodiment, a vibration program is set according to the actual coal blockage situation. The vibration program is executed according to the principle of first starting the upper bin wall vibration hammer 130, then starting the lower bin wall vibration hammer 130, and the upper bin wall vibration hammer 130 hitting more times than the lower bin wall vibration hammer 130. This can effectively prevent the upper vibration from forcing the raw coal to compact.

[0113] Furthermore, an automatic gas-water separation and timed discharge device is installed at a certain height on the outer wall of the coal hopper 100. This automatic gas-water separation and timed discharge device is connected to the bin wall vibrating hammer 130. It adopts a vertical container and has the functions of gas-water separation and timed automatic drainage. It can provide a clean, dry and stable air source for the bin wall vibrating hammer 130, thereby driving the bin wall vibrating hammer 130.

[0114] In a further embodiment, a reinforced protective plate 131 is fixedly installed on the outer wall of the coal hopper 100 corresponding to the striking position of the bin wall vibrating hammer 130. By installing the reinforced protective plate 131, the striking position can be locally reinforced, preventing the striking action of the bin wall vibrating hammer 130 from damaging the coal hopper 100 and the equipment.

[0115] Furthermore, the reinforced protective plate 131 includes a protective plate body 1311 and connecting ribs 1312. The protective plate body 1311 is spaced apart from the outer wall of the coal hopper 100, and the connecting ribs 1312 are arranged around the outer periphery of the protective plate body 1311 and extend towards the outer wall of the coal hopper 100. The connecting ribs 1312 are connected to both the protective plate body 1311 and the outer wall of the coal hopper 100, thereby fixing the reinforced protective plate 131 to the outside of the coal hopper 100.

[0116] In the above scheme, see Figure 2 The protective plate body 1311 is set perpendicular to the normal line L of the outer wall of the coal hopper 100, and the minimum interval distance D between the protective plate body 1311 and the outer wall of the coal hopper 100 is 10±2mm. The side wall of the coal hopper 100 is a frustum side wall, and the normal line L of the outer wall of the coal hopper 100 refers to the straight line perpendicular to the tangent plane at any point on the side of the frustum.

[0117] With the above structure, the protective plate body 1311, the connecting ribs 1312, and the outer wall of the coal hopper 100 together form a cavity 1313. The bin wall vibrating hammer 130 is positioned towards the protective plate body 1311, so that the hammerhead of the bin wall vibrating hammer 130 strikes the protective plate body 1311. Thus, when the bin wall vibrating hammer 130 is working, the cavity 1313 forms a hollow effect, which can amplify the excitation force and enhance the impact force on the raw coal particles inside the coal hopper 100, avoiding the weakening of the vibrating and clearing effect of the bin wall vibrating hammer 130 due to the strengthening of the protective plate 131.

[0118] In one specific embodiment of this invention, the protective plate body 1311 and the connecting rib 1312 are an integral structure, or the two are welded together and fixed, and the connecting rib 1312 is welded to the outer wall of the coal hopper 100.

[0119] As one specific implementation, the unloading section 110 of the coal hopper 100 is provided with a manhole 150 at a certain height for observation and maintenance.

[0120] Specifically, the manhole door 150 is located on the sixth section upward of the bidirectional pneumatic slide gate 140, that is, on the fifth section of the frustum structure 111 from bottom to top of the unloading section 110.

[0121] More specifically, an observation hole matching the manhole door 150 is provided on the aforementioned frustum structure 111, and the manhole door 150 is installed on the outer periphery of the observation hole using a pivot hinge connection. The hinge used to connect the manhole door 150 is firmly welded, and the hinged connection method allows for easy opening and closing. After the manhole door 150 is closed, it is smooth and flush with the inner wall of the coal hopper 100, providing a tight seal without air or dust leakage, and preventing coal from adhering to or accumulating on the inner wall.

[0122] Furthermore, in this embodiment, the connection between the lower opening of the coal hopper 100 and the inlet of the coal feeder 200 is made by an insert-type stainless steel sealing bellows ring (also known as an expansion joint), which consists of a bellows ring and a straight pipe section.

[0123] In this embodiment, a coal flow shaping device is installed at the inlet of the coal feeder 200 to ensure that the coal flow entering from the inlet of the coal feeder 200 is smooth, regular, and uniformly output without spillage. As a specific implementation, the coal flow shaping device can be baffles installed on both sides of the conveyor belt in the coal feeder 200.

[0124] In a further embodiment, the anti-blocking coal storage system with the integrated anti-blocking coal hopper 100 is equipped with a coal cut-off signal acquisition device, and the hopper wall vibrating hammer 130 of the coal cut-off signal acquisition device is electrically connected to the control module of the anti-blocking coal storage system.

[0125] Specifically, the coal shortage signal acquisition device can obtain a corresponding signal when a coal shortage event occurs. After receiving the signal, the control module can control the activation of the bin wall vibrating hammer 130 to vibrate the coal hopper 100, achieving a clearing effect and resolving the problem of coal bridging. In this way, automatic control of clearing coal bridging in the raw coal bin can be achieved, with a more timely and intelligent response.

[0126] In one specific implementation, an electrical control box is installed and debugged near the coal feeder 200. The control box is a double-door, fully enclosed structure. The control system is located inside this control box, which has a control panel for operators to operate. Operators can use this control panel to switch between automatic and manual control modes of the bin wall vibrating hammer 130, thereby controlling the operation of the bin wall vibrating hammer 130 according to actual conditions.

[0127] In automatic control mode, the control module acquires signals from the coal shortage signal acquisition device in real time. When the device sends a signal corresponding to a coal shortage event, it can automatically activate the bin wall vibrating hammer 130 within 5 seconds to promptly resolve the coal shortage issue. In manual control mode, operators can manually activate the bin wall vibrating hammer 130 via the control panel.

[0128] In a further embodiment, the control panel is equipped with an indicator light for the operation of the air hammer 130, which indicates the working status of the bin wall vibrating air hammer.

[0129] In one specific implementation, when the bin wall vibrating hammer 130 is started, the hammer action indicator light is lit, and when the bin wall vibrating hammer 130 is not started, the hammer action indicator light is off.

[0130] In another specific implementation, the air hammer action indicator light can display different colors when the bin wall vibrating air hammer 130 is started and not started.

[0131] By setting up indicator lights for the air hammer's operation, especially when the bin wall vibrating air hammer 130 is in automatic control mode, staff can promptly understand whether the bin wall vibrating air hammer 130 has been started, and thus be able to promptly detect whether there is a problem with coal spillage.

[0132] The integrated anti-blocking coal hopper 100 and the anti-blocking coal storage system with the coal hopper 100 provided in this embodiment can make raw coal particles fall more smoothly from the raw coal storage into the coal feeder 200, ensuring a continuous and reliable supply of raw coal and effectively preventing coal shortages. Tests have shown that the anti-blocking coal storage system has not experienced a single coal shortage when deeply blending low-calorific-value coal. After the raw coal storage was modified, it operated in a dual-mill combination mode during deep peak shaving of the unit, greatly improving the boiler's combustion performance at low loads. Blending low-calorific-value coal reduces fuel costs and, considering both high load and deep peak shaving, maximizes efficiency.

[0133] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A coal hopper anti-blocking device, comprising an integrated anti-blocking coal hopper (100) and a wall-vibrating hammer (130) disposed on the outside of the coal hopper (100), characterized in that, The coal hopper (100) includes: The feeding section (110) receives raw coal particles from the raw coal bunker and conveys them downwards; The discharge section (120) is located below the feeding section (110), and its inlet end is connected to the outlet end of the feeding section (110) for feeding raw coal particles into the coal feeder (200). The feeding section (110) includes several frustum structures (111) connected in sequence. The upper diameter of the frustum structure (111) is larger than its lower diameter. The angle between the side wall of each frustum structure (111) and its cross-section increases from top to bottom. In the feeding section (110), at least some of the frustum structures (111) connected in sequence are provided with the bin wall vibrating hammers (130) on their outer sides, and the bin wall vibrating hammers (130) on the outer sides of two adjacent frustum structures (111) are staggered at a certain angle in the circumference of the coal hopper (100). The outer side of the discharge section (120) is also provided with a bin wall vibrating hammer (130); The bin wall vibrating hammers (130) on the outside of the feeding section (110) and the discharge section (120) are all inclined upward relative to the horizontal plane, so that the end of the bin wall vibrating hammer (130) near the coal hopper (100) is higher than the other end of the bin wall vibrating hammer (130); The tilt angle of the bin wall vibrating hammer (130) on the outer side of the discharge section (120) relative to the horizontal plane is smaller than the tilt angle of the bin wall vibrating hammer (130) on the outer side of the unloading section (110) relative to the horizontal plane.

2. The anti-blocking coal hopper device according to claim 1, characterized in that, The inclination angle of each set of bin wall vibrating hammers (130) on the outer side of the feeding section (110) relative to the horizontal plane decreases from top to bottom; the extension direction of the bin wall vibrating hammers (130) is perpendicular or basically perpendicular to the side wall of the corresponding frustum structure (111).

3. The anti-blocking coal hopper device according to claim 2, characterized in that, The hammerhead of the bin wall vibrating hammer (130) is located at one end near the coal hopper (100); the hammerhead is arranged to reciprocate in a direction inclined relative to the horizontal plane, and moves in an upward direction to strike the feeding section (110) or the discharge section (120).

4. The anti-blocking coal hopper device according to claim 1, characterized in that, The feeding section (110) has 8 to 10 sections of frustum structure (111); wherein, the height of the first and second sections of frustum structure (111) from bottom to top is H1, and the height of the remaining sections of frustum structure (111) is H2, and H1 > H2; The unloading section (110) has at least three frustum structures (111) connected sequentially from the bottom to the outside of each of them. The bin wall vibrating hammers (130) are provided on the outside of each of the three frustum structures (111) connected sequentially from the bottom to the top of the unloading section (110). The bin wall vibrating hammers (130) are spirally distributed around the outer periphery of the unloading section (110) from the frustum structure (111) at the bottom of the unloading section (110). The bin wall vibrating hammer (130) is not installed on the outside of the other frustum structures (111) of the feeding section (110); wherein, the number of frustum structures (111) with the bin wall vibrating hammer (130) is less than or equal to the number of frustum structures (111) without the bin wall vibrating hammer (130); the included angle between the side wall and the cross-section of the frustum structure (111) with the bin wall vibrating hammer (130) is greater than or equal to 75°.

5. The anti-blocking coal hopper device according to claim 4, characterized in that, Two sets of opposing bin wall vibrating hammers (130) are provided on the outside of the discharge section (120); A set of bin wall vibrating air hammers (130) is provided on the outer side of the first to fourth truncated cone structures (111) from bottom to top in the feeding section (110). The bin wall vibrating air hammers (130) on the outer periphery of two adjacent truncated cone structures (111) are staggered by 180° in the circumferential direction.

6. The anti-blocking coal hopper device according to claim 5, characterized in that, The discharge section (120) includes an upper discharge section (121) and a lower discharge section (122), both of which are frustum-shaped cylinders with a larger upper section and a smaller lower section; the height of the upper discharge section (121) is H3, the height of the lower discharge section (122) is H4, and H1 > H4 > H2 > H3; The discharge section (120) is provided with a bidirectional pneumatic slide gate (140) located between the upper discharge section (121) and the lower discharge section (122). A bin wall vibrating hammer (130) located outside the discharge section (120) is installed on the lower side of the bidirectional pneumatic slide gate (140) and above the inlet of the coal feeder (200).

7. The anti-blocking coal hopper device according to any one of claims 1-6, characterized in that, The outer wall of the coal hopper (100) is fixedly fitted with a reinforced protective plate (131) corresponding to the striking position of the bin wall vibrating hammer (130).

8. The anti-blocking coal hopper device according to claim 7, characterized in that, The reinforced protective plate (131) includes: The protective plate body (1311) is set perpendicular to the normal line of the outer wall of the coal hopper (100) and has a gap between it and the outer wall of the coal hopper (100). The minimum gap distance between the protective plate body (1311) and the outer wall of the coal hopper (100) is 10±2mm. Connecting ribs (1312) are arranged around the outer periphery of the protective plate body (1311) and are respectively connected to the outer walls of the protective plate body (1311) and the coal hopper (100); The protective plate body (1311), the connecting ribs (1312), and the outer wall of the coal hopper (100) together form a cavity (1313), and the bin wall vibrating hammer (130) is set towards the protective plate body (1311).

9. A coal bunker anti-clogging system, characterized in that, It includes a raw coal bunker and a coal feeder (200), as well as an anti-blocking coal hopper device as described in any one of claims 1-8; The upper opening of the feeding section (110) is connected to the feeding outlet of the raw coal bunker to receive raw coal particles in the raw coal bunker; the lower opening of the discharging section (120) is connected to the inlet of the coal feeder (200) to feed raw coal particles into the coal feeder (200). The inlet of the coal feeder (200) is equipped with baffles located on both sides of the belt in the coal feeder (200) for coal flow shaping.

10. The anti-clogging coal bunker system according to claim 9, characterized in that, The anti-blocking coal bunker system is equipped with a coal cut-off signal acquisition device and a pneumatic hammer action indicator light. The coal cut-off signal acquisition device, the bunker wall vibrating pneumatic hammer (130) and the pneumatic hammer action indicator light are electrically connected to the control module of the anti-blocking coal bunker system. The start-up state of the bin wall vibrating hammer (130) corresponds to the lit state of the hammer action indicator light, and the non-start-up state of the bin wall vibrating hammer (130) corresponds to the off state of the hammer action indicator light; or, the start-up and non-start-up states of the bin wall vibrating hammer (130) correspond to different colors displayed by the hammer action indicator light.

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