Multi-angle coal bunker fluidization blockage removing system

Abstract

The application discloses a multi-angle coal bunker fluidization blockage removing system, which is provided with a screw-resisting type material level meter and multiple spray heads surrounding the coal bunker. When the screw-resisting type material level meter detects coal blockage, the corresponding spray head receives external airflow, so that the external airflow enters the coal bunker through a gas injection port. The opening of the gas injection port is downward, and the airflow can be stably discharged from the gas injection port after being blocked by the inclined baffle. On one hand, the airflow blows the coal blocks downward, and on the other hand, the airflow blows the mud and powder between the coal blocks, so that the blockage forms a fluidization state, that is, the coal blocks flow like fluid under the action of flowing gas and particles, thereby achieving the purpose of removing the blockage. The multiple spray heads surrounding the coal bunker can simultaneously push the coal blocks at the same height, so that the coal blocks at more regions form the fluidization state and move downward synchronously, thereby achieving a better blockage removing effect. Furthermore, a pulse type electric valve is further arranged, so that the airflow impacts the coal blocks at the blockage in a pulse mode, thereby improving the blockage removing effect.

Description

Technical Field

[0001] This invention relates to the field of coal bunker unblocking technology, and in particular to a multi-angle coal bunker fluidization unblocking system. Background Technology

[0002] A coal bunker is a storage silo for granular materials such as coal lumps or coal slurry in a thermal power plant. It is mainly used as an intermediate storage device to directly supply coal for boiler combustion. In actual production, coal stored elsewhere is first transported to the coal bunker, and the coal in the bunker falls into the belt feeder and other devices by its own gravity. However, in the process of discharging from existing coal bunkers, serious coal sticking and coal blockage often occur, causing coal lumps or coal slurry to block the flow and making it impossible to discharge smoothly. In actual processing, manual or equipment knocking and impacting the outer wall of the coal bunker is used.

[0003] Manually or using devices to knock on the coal bunker is not only noisy but also inefficient, often failing to fully and quickly resolve the problem of coal blockage. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a multi-angle coal bunker fluidization unblocking system.

[0005] This invention provides a multi-angle coal bunker fluidization unblocking system, comprising:

[0006] A coal bunker, wherein a first axis is located at the center of the coal bunker, and the extension direction of the first axis is a first direction;

[0007] The gas injection mechanism includes a main gas pipe located on one side of the coal bunker. One end of the main gas pipe is connected to a gas source. The coal bunker has several sets of secondary gas paths arranged along a first direction. Each secondary gas path includes two symmetrically arranged second branch gas channels. One end of each of the two second branch gas channels is connected to the main gas pipe. Each second branch gas channel is equipped with a pulse-type electric valve near the end of the main gas pipe.

[0008] A plurality of nozzle mechanisms, each corresponding to a secondary air path, include a plurality of nozzles that pass through the coal bunker around the first axis. Each nozzle has a second axis, the extension direction of which is perpendicular to the first axis. Each nozzle is provided with an inclined baffle at its inner end in the coal bunker. The inclined baffle and the inner wall of the coal bunker have a first angle with a downward opening. The bottom end of the nozzle is provided with an air injection port between the inclined baffle and the inner wall of the coal bunker. The opening direction of the air injection port is perpendicular to the normal direction of the inclined baffle.

[0009] Several rotary paddle level gauges are installed on the coal bunker and correspond to each of the secondary air passages, respectively, for monitoring the material position in the coal bunker.

[0010] According to the technical solution provided in the embodiments of this application, the nozzle mechanism further includes a plurality of intermediate tubes connected to the ends of each nozzle away from the first axis. An adjustment disc is provided in the middle of the intermediate tube and rotates around a third axis. The extension direction of the third axis is the first direction. The arc surface of the adjustment disc is adapted to the inner surface of the intermediate tube.

[0011] The unblocking system also includes several driving mechanisms, each of which corresponds to a secondary air path. Each driving mechanism drives the corresponding nozzle to rotate around a second axis and / or drives the corresponding adjustment disc to rotate around a third axis.

[0012] According to the technical solution provided in the embodiments of this application, the nozzle is rotatably installed at one end of the intermediate tube, the other end of the intermediate tube is connected to the second branch air passage, a self-rotating rotating shaft is provided through the middle of the intermediate tube, the rotating shaft has the third axis, and the adjusting disc is clamped in the middle of the rotating shaft.

[0013] According to the technical solution provided in the embodiments of this application, each of the nozzles is fitted with a driven bevel gear on the outer wall outside the coal bunker, and each of the rotating shafts is fitted with a driven spur gear through the intermediate tube at its top end.

[0014] The drive mechanism includes a drive ring disposed between each of the driven bevel gears and each of the driven spur gears. The drive ring has an inner ring surface and an outer ring surface. The drive ring is provided with a meshing area corresponding to each of the nozzles. Each meshing area includes a forward rotation area, an airflow adjustment area, and a reverse rotation area. The inner ring surface of the forward rotation area and the reverse rotation area is provided with a second transmission tooth, and each second transmission tooth meshes with the corresponding driven bevel gear. The outer ring surface of the airflow adjustment area is provided with a first transmission tooth, and each first transmission tooth meshes with the corresponding driven spur gear.

[0015] According to the technical solution provided in the embodiments of this application, the driving mechanism further includes a transmission outer gear ring sleeved outside the coal bunker, the driving ring is disposed on the bottom surface of the transmission outer gear ring, a motor is provided on the outer wall of the coal bunker corresponding to the position of the transmission outer gear ring, a driving gear is sleeved on the output shaft end of the motor, and the driving gear meshes with the transmission outer gear ring for transmission connection.

[0016] According to the technical solution provided in the embodiments of this application, a first support seat is provided on the outer wall of the coal bunker at each of the nozzle positions, and a thrust ball bearing is embedded in the first support seat, with the other end face of the thrust ball bearing embedded in the driven bevel gear end.

[0017] According to the technical solution provided in the embodiments of this application, the coal bunker is provided with a plurality of protective mechanisms, each of which is located above each of the rotary paddle level gauges, and is used to prevent the material from colliding with the detection rod of the rotary paddle level gauge when it falls.

[0018] According to the technical solution provided in the embodiments of this application, an airflow transfer box is provided above each of the rotary paddle level gauges in the coal bunker. An air distribution plate is provided in the middle of the airflow transfer box. A third branch air passage connected to the main air pipe is provided on one side of the airflow transfer box located away from the third branch air passage. Several interlocking strips arranged along a first direction are provided at the top of the airflow transfer box away from the third branch air passage. A strip-shaped air outlet channel is provided in the middle of the interlocking strips. Two insertion tubes are symmetrically provided at the bottom of the airflow transfer box away from the third branch air passage. Side air outlet holes are evenly provided on the opposite sides of the insertion tubes.

[0019] According to the technical solution provided in the embodiments of this application, the second branch airway includes a plurality of airway branch structures connected to the nozzle, and a connecting pipe connecting each of the airway branch structures, wherein each airway branch structure is used for the installation of the intermediate pipe and the nozzle.

[0020] According to the technical solution provided in the embodiments of this application, the airway branch structure includes two straight tubes and a three-way tube. The two ends of the three-way tube are rotatably connected to the two straight tubes respectively, and the remaining end of the three-way tube is detachably connected to the intermediate tube.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. A rotary paddle level gauge and multiple nozzles surrounding the coal bunker are installed. When the rotary paddle level gauge detects coal blockage, the corresponding nozzle receives external airflow, which enters the coal bunker through the air inlet. The air inlet is set with its opening facing downwards. After being blocked by the inclined baffle, the airflow can be stably discharged from the air inlet. On the one hand, it blows the coal blocks downwards, and on the other hand, it blows away the mud and powder between the coal blocks, so that the blockage is fluidized. That is, the coal blocks flow like a fluid under the action of flowing gas and particles, thereby achieving the purpose of clearing the blockage. Moreover, the multiple nozzles surrounding the coal bunker can simultaneously push coal blocks at the same height, so that more areas of coal blocks are fluidized and move downwards synchronously, resulting in a better clearing effect. Furthermore, a pulse-type electric valve is also installed so that the airflow impacts the coal blocks at the blockage in a pulse manner, improving the clearing effect.

[0023] 2. Based on the nozzle clearing mechanism, the drive mechanism can drive all nozzles at the same height to rotate synchronously, causing the downward-facing air injection ports to swing to the same side. Compared to directly pushing the coal block downwards, the rotating nozzles can push some of the coal blocks to move clockwise or counterclockwise. On the basis of the original downward flow, the fluidized coal blocks have a tendency to move downwards at an angle. In actual clearing, if the resistance of the airflow driving the fluidized coal blocks to move downwards is too great and the blockage problem is not solved, the nozzles can be rotated to adjust the coal block flow angle, so as to achieve multi-angle driving of coal block flow, avoid the situation where the resistance of the single-direction movement trend is too great and the blockage cannot be cleared, thus achieving an effective clearing effect.

[0024] 3. An intermediate pipe, an adjusting disc, and a rotating shaft are also provided. The adjusting disc is driven to rotate by a drive mechanism, which adjusts the cross-sectional area of ​​the airflow passing through the intermediate pipe. The smaller the cross-sectional area of ​​the airflow, the faster the airflow speed. Thus, when the gas source has been adjusted to the maximum gas flow speed, the cross-sectional area of ​​the airflow passing through the intermediate pipe can be reduced by adjusting the disc, thereby increasing the gas flow speed and further enhancing the gas driving force. This allows the gas to push the coal block more stably and powerfully, further improving the unblocking effect.

[0025] 4. The drive mechanism includes a drive ring, a forward rotation area, and a reverse rotation area. The rotation of the drive ring drives the nozzle to rotate in the forward and reverse directions, thereby adjusting the air injection port angle. Furthermore, an airflow adjustment area is set between the forward and reverse rotation areas to facilitate the rotation of the adjustment disc and adjust the airflow through the internal cross-section of the intermediate pipe. The operation of the nozzle and the adjustment disc is achieved by a single drive ring, reducing the number of drive electrical components and ensuring the synchronous operation of each nozzle and the adjustment disc, thus ensuring the unblocking efficiency.

[0026] 5. The rotary paddle level gauge is a commonly used instrument for detecting the position of materials in silos. It determines the presence of coal blockage below the level gauge by detecting the cessation of rotation of the probe rod. This invention incorporates a protective mechanism that connects to the main air pipe via an airflow transfer box and discharges through the strip-shaped air outlet channel of the interlocking strip, forming an airflow obstruction. This obstructed airflow pushes away the coal block, preventing it from impacting the probe rod and causing misjudgment by the rotary paddle level gauge. Compared to using a baffle directly, which can easily become a fulcrum for coal blockage, the airflow obstruction avoids this. Furthermore, an insertion tube and a side air outlet are provided to prevent coal from impacting the probe rod of the rotary paddle level gauge from the side, further reducing the probability of misjudgment by the rotary paddle level gauge.

[0027] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of the present invention, nor is it intended to restrict the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0028] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0029] Figure 1 A schematic diagram of a multi-angle coal bunker fluidization unblocking system provided in this application embodiment;

[0030] Figure 2 A schematic diagram of the structure of the second branch air passage in a multi-angle coal bunker fluidization unblocking system provided in this application embodiment;

[0031] Figure 3 A schematic diagram of the nozzle installation structure in a multi-angle coal bunker fluidization unblocking system provided in this application embodiment;

[0032] Figure 4 A schematic diagram of the opening structure of the gas injection port in a multi-angle coal bunker fluidized blockage clearing system provided in this application embodiment;

[0033] Figure 5 This application provides a schematic diagram of the air duct branch structure in a multi-angle coal bunker fluidization unblocking system.

[0034] Figure 6 for Figure 5 A magnified schematic diagram of a portion of region A in the middle;

[0035] Figure 7 A schematic diagram of the installation structure of the drive ring and the transmission external gear ring in a multi-angle coal bunker fluidization unblocking system provided in this application embodiment;

[0036] Figure 8 A schematic diagram of the drive ring structure in a multi-angle coal bunker fluidization unblocking system provided in this application embodiment;

[0037] Figure 9 A schematic diagram of the installation structure of an airflow transfer box in a multi-angle coal bunker fluidization unblocking system provided in this application embodiment;

[0038] Figure 10 A schematic diagram of the installation structure of the gas distribution plate in a multi-angle coal bunker fluidization unblocking system provided in this application embodiment;

[0039] Figure 11 This is a schematic diagram of the installation structure of the insert pipe in a multi-angle coal bunker fluidized blockage clearing system provided in an embodiment of this application.

[0040] Numbering on the map:

[0041] 1. Coal bunker;

[0042] 2. Injection mechanism; 21. Main air pipe; 22. First branch airway; 23. Second branch airway; 231. Connecting pipe; 24. Pulse-type electric valve;

[0043] 3. Nozzle mechanism; 31. Nozzle head; 32. Air inlet; 321. Air injection angle; 33. Sloping baffle; 34. Driven bevel gear; 35. First reducing pipe; 36. Intermediate pipe; 37. Rotating shaft; 38. Adjusting disc; 39. Driven spur gear; 310. First support base; 311. Thrust ball bearing; 312. First bearing;

[0044] 4. Drive mechanism; 41. External transmission gear ring; 42. Drive ring; 421. Inner ring surface; 422. Outer ring surface; 423. Forward rotation area; 424. Airflow regulation area; 425. Reverse rotation area; 426. First transmission gear; 427. Second transmission gear; 43. Motor; 44. Drive gear;

[0045] 5. Airway branch structure; 51. Straight pipe; 52. Second reducer pipe; 53. Tee pipe; 54. Second bearing; 55. First external thread; 56. First internal thread sleeve; 57. Second external thread; 58. Second internal thread sleeve; 59. Annular stop block;

[0046] 6. Rotary paddle level gauge;

[0047] 7. Protective mechanism; 71. Airflow transfer box; 72. Third branch airway; 73. Fitting strip; 74. Strip-shaped air outlet channel; 75. Guide slope; 76. Insertion tube; 77. Side air outlet; 78. Air distribution plate. Detailed Implementation

[0048] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0049] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0050] Please refer to Figures 1 to 11 The present invention provides a multi-angle coal bunker fluidization unblocking system, comprising:

[0051] Coal bunker 1 has a first axis at its center, and the direction of extension of the first axis is a first direction; wherein, the first direction is Figure 1 In the vertical direction, the first axis is the centerline of coal bunker 1;

[0052] The gas injection mechanism 2 includes a main gas pipe 21 located on one side of the coal bunker 1. One end of the main gas pipe 21 is connected to a gas source. The coal bunker 1 has several sets of secondary gas paths arranged along the first direction. Each secondary gas path includes two symmetrically arranged second branch gas channels 23. One end of each of the two second branch gas channels 23 is connected to the main gas pipe 21. Each second branch gas channel 23 is equipped with a pulse-type electric valve 24 near the end of the main gas pipe 21.

[0053] Several nozzle mechanisms 3, each corresponding to a secondary air path, include several nozzles 31 that pass through the coal bunker 1 around the first axis. Each nozzle 31 has a second axis, the extension direction of which is perpendicular to the first axis. Each nozzle 31 located inside the coal bunker 1 is provided with an inclined baffle 33. The inclined baffle 33 and the inner wall of the coal bunker 1 have a first angle with a downward opening. The bottom end of the nozzle 31 is provided with an air injection port 32 located between the inclined baffle 33 and the inner wall of the coal bunker 1. The opening direction of the air injection port 32 is perpendicular to the normal direction of the inclined baffle 33.

[0054] like Figure 1 As shown, two second branch air passages 23 of the same secondary air passage are connected to the main air pipe 21 through the first branch air passage 22. The gas generated by the gas source first enters the main air pipe 21, then is diverted to each first branch air passage 22, and then enters each secondary air passage. Finally, it flows from the second branch air passage 23 into each nozzle 31. After being blocked by the inclined baffle 33, the airflow can be stably discharged from the air inlet 32. On the one hand, it drives the coal blocks to move downwards, and on the other hand, it blows away the mud and powder between the coal blocks, making it easier for the coal blocks to move downwards, thereby achieving the purpose of clearing the blockage. In addition, the multiple nozzles 31 surrounding the coal bunker 1 can push coal blocks at the same height, improving the ability of the coal block assembly to move downwards together, resulting in a better blockage clearing effect. Furthermore, a pulse-type electric valve 24 is also provided, so that the airflow impacts the coal block at the blockage in a pulse manner, improving the blockage clearing effect. In addition, as Figure 4 As shown, the opening of the gas injection port 32 has a gas injection angle 321, which is 120 degrees, and can drive the coal block more effectively.

[0055] Several rotary paddle level gauges 6 are installed on the coal bunker 1 and correspond to each secondary air passage respectively, for monitoring the material position in the coal bunker 1;

[0056] like Figure 1 and Figure 9As shown, the rotary paddle level gauge 6 is a common existing mechanism. Its installation method is usually to set a pipe and flange on the coal bunker 1 and connect them through the flange on the main body of the rotary paddle level gauge 6. The detection rod of the rotary paddle level gauge 6 extends into the coal bunker 1 through the pipe. When the detection rod stops rotating, the rotary paddle level gauge 6 will determine that the material is nearby, that is, the detection rod is stuck after the coal blockage occurs, so as to realize the purpose of detecting the coal blockage. When the blockage occurs, the pulse electric valve 24 of the corresponding secondary air circuit can be quickly activated to realize the purpose of air injection to clear the blockage.

[0057] In some embodiments, the nozzle mechanism 3 further includes a plurality of intermediate tubes 36 connected to the ends of each nozzle 31 away from the first axis. The intermediate tubes 36 are provided with an adjustment disk 38 rotating about a third axis in the middle. The extension direction of the third axis is the first direction. The arc surface of the adjustment disk 38 is adapted to the inner surface of the intermediate tubes 36.

[0058] The unblocking system also includes several drive mechanisms 4, each drive mechanism 4 corresponding to a secondary air path. Each drive mechanism 4 drives the corresponding nozzle 31 to rotate around the second axis and / or drives the corresponding adjustment disk 38 to rotate around the third axis.

[0059] like Figure 2 and Figure 3 As shown, based on the unblocking of nozzle 31, the drive mechanism 4 can drive all nozzles 31 at the same height to rotate synchronously, causing the downward-facing air injection port 32 to swing to the same side. Compared to directly pushing the coal block downwards, the rotating nozzle 31 can push some of the coal block to move clockwise or counterclockwise. On the basis of the original downward flow, it makes the fluidized coal block have a tendency to move obliquely downwards. In actual unblocking, if the resistance to the downward movement of the fluidized coal block driven by the airflow is too great and the blockage problem is not solved, the nozzle 31 can be rotated to adjust the flow angle of the coal block, so as to achieve multi-angle drive of coal block flow and avoid a unidirectional movement tendency. In cases of excessive resistance, the adjustment disc 38 is further rotated by the drive mechanism 4 to adjust the cross-sectional area of ​​the airflow passing through the intermediate pipe 36. The smaller the cross-sectional area, the faster the airflow velocity. Thus, when the gas source has been adjusted to the maximum gas velocity, the cross-sectional area of ​​the airflow passing through the intermediate pipe 36 can be reduced by adjusting the disc 38, thereby increasing the gas velocity and further enhancing the gas driving force. This allows the gas to push the coal block more stably and powerfully, further improving the unblocking effect. Moreover, the driving mode of the two can be designed in advance according to the requirements, enabling them to operate independently or in tandem, thus improving the unblocking efficiency.

[0060] In some embodiments, the nozzle 31 is rotatably mounted on one end of the intermediate tube 36, the other end of the intermediate tube 36 is connected to the second branch air passage 23, a self-rotating shaft 37 is provided through the middle of the intermediate tube 36, the shaft 37 has a third axis, and an adjustment disc 38 is clamped in the middle of the shaft 37.

[0061] like Figure 3 and Figure 5 As shown, the adjusting disc 38 will rotate with the rotating shaft 37. The arc surface of the adjusting disc 38 is adapted to the inner surface of the intermediate tube 36. At this time, the airflow cross section is the smallest. As the adjusting disc 38 rotates, it will gradually increase and then decrease, achieving the purpose of repeated adjustment.

[0062] In some embodiments, each nozzle 31 is fitted with a driven bevel gear 34 on the outer wall outside the coal bunker 1, and each shaft 37 is fitted with a driven spur gear 39 through the intermediate tube 36 at its top end.

[0063] The drive mechanism 4 includes a drive ring 42 disposed between each driven bevel gear 34 and each driven spur gear 39. The drive ring 42 has an inner ring surface 421 and an outer ring surface 422. The drive ring 42 is provided with a meshing area corresponding to each nozzle 31. Each meshing area includes a forward rotation area 423, an airflow adjustment area 424 and a reverse rotation area 425. The inner ring surface 421 in the forward rotation area 423 and the reverse rotation area 425 is provided with a second transmission tooth 427. Each second transmission tooth 427 meshes with the corresponding driven bevel gear 34. The outer ring surface 422 in the airflow adjustment area 424 is provided with a first transmission tooth 426. Each first transmission tooth 426 meshes with the corresponding driven spur gear 39.

[0064] like Figure 3 and Figure 8 As shown, when the drive ring 42 rotates, the first transmission tooth 426 pushes the teeth of the driven spur gear 39, thereby driving the driven spur gear 39 to rotate, achieving the purpose of driving the rotating shaft 37 and the adjusting disc 38 to rotate. Meanwhile, the second transmission tooth 427 on the inner ring surface 421 pushes the teeth of the driven bevel gear 34, thereby driving the driven bevel gear 34 to rotate, driving the nozzle 31 to rotate, thus achieving the purpose of adjusting the air outlet angle of the air inlet 32.

[0065] In this embodiment, the initial state of the drive ring 42 is as follows: Figure 8As shown, the airflow direction through the intermediate pipe 36 is perpendicular to the normal direction of the adjusting disk 38. When the drive ring 42 rotates, the flow rate is first adjusted, that is, the first transmission tooth 426 of the airflow adjustment area 424 drives the adjusting disk 38 to rotate. When the driven spur gear 39 disengages from the airflow adjustment area 424, the adjusting disk 38 returns to its initial state and continues to move. Regardless of whether it enters the forward rotation area 423 or the reverse rotation area 425, the second transmission tooth 427 of the inner ring surface 421 drives the driven bevel gear 34 to rotate. However, due to the difference in the rotation direction of the drive ring 42, the nozzle 31 will rotate forward or reverse, so as to achieve the purpose of stabilizing the angle of the nozzle 31. Further optionally, a number of first transmission teeth 426 are provided on the outer ring surface 422 of the forward rotation area 423 and the reverse rotation area 425. By adjusting the interval between the first transmission teeth 426, the rotation angle of the driven spur gear 39 is adjusted, thereby realizing the synchronous rotation of the nozzle 31 and the adjustment disk 38, so as to achieve a more thorough unblocking.

[0066] In some embodiments, the drive mechanism 4 further includes a transmission external gear ring 41 sleeved outside the coal bunker 1, a drive ring 42 disposed on the bottom surface of the transmission external gear ring 41, a motor 43 disposed on the outer wall of the coal bunker 1 at the position corresponding to the transmission external gear ring 41, a drive gear 44 sleeved on the output shaft end of the motor 43, and the drive gear 44 meshing with the transmission external gear ring 41 for transmission connection.

[0067] like Figure 3 , Figure 7 and Figure 8 As shown, the drive gear 44 is driven to rotate by the motor 43, and then the drive gear 44 drives the transmission outer gear ring 41 to rotate. The drive ring 42 is located on the bottom surface of the transmission outer gear ring 41, which realizes the stable adjustment of the drive ring 42.

[0068] In some embodiments, a first support seat 310 is provided on the outer wall of the coal bunker 1 at the position corresponding to each nozzle 31. A thrust ball bearing 311 is embedded in the first support seat 310, and the other end face of the thrust ball bearing 311 is embedded in the driven bevel gear 34.

[0069] like Figure 3 As shown, the driven bevel gear 34 is supported by the thrust ball bearing 311, which improves the stability of the driven bevel gear 34 during rotation. Furthermore, the transmission external gear ring 41 is supported by the top of the first support seat 310, which ensures the stable rotation of the transmission external gear ring 41. When disassembling or adjusting the nozzle 31, the transmission external gear ring 41 can be pushed upward.

[0070] In some embodiments, the coal bunker 1 is provided with a plurality of protective mechanisms 7, each protective mechanism 7 being located above each rotary paddle level gauge 6, for preventing material from colliding with the detection rod of the rotary paddle level gauge 6 when it falls; such as Figure 1 and Figure 9As shown, this design avoids situations where coal blocks collide with the detection rod, causing it to stop operating, thus preventing misjudgments by the rotary paddle level gauge 6 and improving its detection accuracy.

[0071] In some embodiments, the coal bunker 1 is provided with an airflow transfer box 71 above each rotary paddle level gauge 6. The airflow transfer box 71 is provided with an air distribution plate 78 in the middle. The airflow transfer box 71 is provided with a third branch air passage 72 connected to the main air pipe 21 on one side of the air distribution plate 78. The top of the airflow transfer box 71 away from the third branch air passage 72 is provided with a plurality of interlocking strips 73 arranged along the first direction. The middle of the interlocking strips 73 is provided with a strip-shaped air outlet channel 74. The bottom of the airflow transfer box 71 away from the third branch air passage 72 is symmetrically provided with two insertion tubes 76. The insertion tubes 76 are evenly provided with side air outlet holes 77 on the sides away from each other.

[0072] like Figure 9 , Figure 10 and Figure 11 As shown, the gas distribution plate 78 is evenly distributed with several fine holes. Gas enters the airflow transfer box 71 from the main gas pipe 21 through the third branch gas channel 72, passes through the fine holes on the gas distribution plate 78 for even distribution, and then exits through the strip-shaped gas outlet channel 74 of the interlocking strip 73, forming a blocking airflow. The blocking airflow can push away coal blocks, preventing coal blocks from hitting the detection rod and causing the rotary paddle level gauge 6 to misjudge. Compared with using a baffle directly, which is also prone to becoming a fulcrum for coal blockage, the blocking airflow can avoid this situation. In addition, the multiple interlocking strips 73 arranged in the vertical direction give the protective mechanism 7 multiple blocking airflows, improving the blocking effect. In addition, some gas will also be discharged from the side vent 77 of the insertion tube 76, preventing coal blocks from hitting the detection rod of the rotary paddle level gauge 6 from the side, further reducing the probability of misjudgment by the rotary paddle level gauge 6. Furthermore, the insertion tubes 76 are also evenly provided with side vent 77 on the sides close to each other, and these two sets of side vent 77 are staggered, which forms a new blocking airflow and reduces the mutual interference between the blocking airflows, improving the blocking effect. Optionally, the inner edge of the strip-shaped air outlet channel 74 is provided with a guiding slope 75, so that more gas can enter the interior of the strip-shaped air outlet channel 74, increasing the air outlet rate and thus increasing the strength of the blocking airflow.

[0073] In some embodiments, the second branch airway 23 includes a plurality of airway branch structures 5 connected to the nozzle 31, and a connecting pipe 231 connecting each airway branch structure 5. Each airway branch structure 5 is used for the installation of the intermediate pipe 36 and the nozzle 31.

[0074] like Figure 3 , Figure 5 and Figure 6As shown, after the intermediate tube 36 and the nozzle 31 are installed, the nozzle 31 can be inserted into the corresponding mounting hole and can rotate on its own after installation. Furthermore, this ensures that the intermediate tube 36 remains stable after installation and does not rotate with it, thus ensuring that the nozzle 31 rotates stably and the intermediate tube 36 remains stable when the drive mechanism 4 is working.

[0075] In some embodiments, the airway branch structure 5 includes two straight tubes 51 and a three-way tube 53. The two ends of the three-way tube 53 are rotatably connected to the two straight tubes 51 respectively, and the remaining end of the three-way tube 53 is detachably connected to the intermediate tube 36.

[0076] like Figure 3 , Figure 5 and Figure 6 As shown, when installing the nozzle 31 or the intermediate tube 36, first lift the transmission outer gear ring 41 upwards, then insert the nozzle 31 into the corresponding mounting hole, then swing the three-way tube 53 to adjust it so that the remaining end of the three-way tube 53 corresponds to the intermediate tube 36, and then the assembly can be carried out.

[0077] In some embodiments, the remaining end of the three-way pipe 53 is provided with a first external thread 55, and the first external thread 55 is externally threaded to a first internal thread sleeve 56. The end of the intermediate pipe 36 away from the nozzle 31 is provided with a second external thread 57, and the second external thread 57 is externally threaded to a second internal thread sleeve 58. An annular stop block 59 is embedded in the end of the second internal thread sleeve 58 near the end of the first internal thread sleeve 56.

[0078] like Figure 5 and Figure 6 As shown, when installing the remaining end of the tee pipe 53 and the intermediate pipe 36, first rotate the second internal thread sleeve 58. Through the cooperation of the second internal thread sleeve 58 and the second external thread 57, the two are initially connected. Then, push the nozzle 31 and the intermediate pipe 36 towards the coal bunker 1, so that the driven bevel gear 34 presses the thrust ball bearing 311 against the first support seat 310 to maintain the stability of the thrust ball bearing 311. Then rotate the first internal thread sleeve 56. Through the cooperation of the first internal thread sleeve 56 and the first external thread 55, drive the first internal thread sleeve 56 to move towards the nozzle 31 and abut against the annular block 59. Through the action of the second internal thread sleeve 58 and the second external thread 57, push the intermediate pipe 36 and the nozzle 31 towards the coal bunker 1, and the driven bevel gear 34 presses the thrust ball bearing 311 and the first support seat 310 to ensure the stable installation of the nozzle 31 and the intermediate pipe 36.

[0079] In some embodiments, such as Figure 2 and Figure 5As shown, a second reducer 52 is provided between each of the two straight pipes 51 and the three-way pipe 53. A first reducer 35 is provided at one end of the nozzle 31. Both the first reducer 35 and the second reducer 52 have narrow and wide openings. Along the gas flow direction, the narrow opening of the second reducer 52 near the pulse-type electric valve 24 is welded to the three-way pipe 53, and a second bearing 54 is embedded in its wide opening. The second bearing 54 is fitted onto the corresponding straight pipe 51. Meanwhile, the narrow opening of the second reducer 52 away from the pulse-type electric valve 24 is welded to the straight pipe 51, and a second bearing 54 is embedded in its wide opening. This second bearing 54 is fitted onto the corresponding end of the three-way pipe 53. Figure 3 As shown, one end of the nozzle 31 is welded to the narrow opening of the first reducing pipe 35. The wide opening of the first reducing pipe 35 contains a first bearing 312, which is fitted onto the outer wall of the intermediate pipe 36. The various components are connected through the reducing pipe fittings to achieve rotational connection between the pipes. The airflow always flows from the wide opening to the narrow opening, improving the flow efficiency of the airflow and reducing the waste of gas kinetic energy. If the airflow flows from the narrow opening to the wide opening, flow resistance will occur, resulting in a decrease in airflow velocity.

[0080] In some embodiments, such as Figure 2 and Figure 5 As shown, both the first bearing 312 and the second bearing 54 are provided with sealing rings near the narrow opening. The sealing rings are connected to the inner wall of the first reducing pipe 35 or the inner wall of the second reducing pipe 52, which reduces the contact between the airflow and the first bearing 312 or the second bearing 54. This reduces the leakage of airflow and also avoids damage to the first bearing 312 or the second bearing 54 caused by long-term airflow impact.

[0081] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be 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 application according to the specific circumstances.

[0082] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0083] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A multi-angle coal bunker unblocking system, characterized in that, include: A coal bunker, wherein a first axis is located at the center of the coal bunker, and the extension direction of the first axis is a first direction; The gas injection mechanism includes a main gas pipe located on one side of the coal bunker. One end of the main gas pipe is connected to a gas source. The coal bunker has several sets of secondary gas paths arranged along a first direction. Each secondary gas path includes two symmetrically arranged second branch gas channels. One end of each of the two second branch gas channels is connected to the main gas pipe. Each second branch gas channel is equipped with a pulse-type electric valve near the end of the main gas pipe. A plurality of nozzle mechanisms, each corresponding to a secondary air path, include a plurality of nozzles that pass through the coal bunker around the first axis. Each nozzle has a second axis, the extension direction of which is perpendicular to the first axis. Each nozzle is provided with an inclined baffle at its inner end in the coal bunker. The inclined baffle and the inner wall of the coal bunker have a first angle with a downward opening. The bottom end of the nozzle is provided with an air injection port between the inclined baffle and the inner wall of the coal bunker. The opening direction of the air injection port is perpendicular to the normal direction of the inclined baffle. Several rotary paddle level gauges are installed on the coal bunker and correspond to each of the secondary air passages, respectively, for monitoring the material position in the coal bunker; The nozzle mechanism further includes several intermediate tubes connected to the ends of each nozzle away from the first axis. The middle of each intermediate tube is provided with an adjustment disk that rotates around a third axis. The extension direction of the third axis is the first direction. The arc surface of the adjustment disk is adapted to the inner surface of the intermediate tube. The unblocking system also includes several driving mechanisms, each driving mechanism corresponding to each of the secondary air passages. Each driving mechanism drives the corresponding nozzle to rotate around the second axis and / or drives the corresponding adjustment disc to rotate around the third axis. The nozzle is rotatably mounted on one end of the intermediate tube, and the other end of the intermediate tube is connected to the second branch air passage. A rotating shaft is provided through the middle of the intermediate tube, and the rotating shaft has the third axis. The adjusting disc is clamped in the middle of the rotating shaft. Each of the nozzles is fitted with a driven bevel gear on the outer wall outside the coal bunker, and each of the rotating shafts is fitted with a driven spur gear through the intermediate tube at its top end; The drive mechanism includes a drive ring disposed between each of the driven bevel gears and each of the driven spur gears. The drive ring has an inner ring surface and an outer ring surface. The drive ring is provided with a meshing area corresponding to each of the nozzles. Each meshing area includes a forward rotation area, an airflow adjustment area, and a reverse rotation area. The inner ring surface of the forward rotation area and the reverse rotation area is provided with a second transmission tooth, and each second transmission tooth meshes with the corresponding driven bevel gear. The outer ring surface of the airflow adjustment area is provided with a first transmission tooth, and each first transmission tooth meshes with the corresponding driven spur gear. The driving mechanism also includes a transmission outer gear ring sleeved outside the coal bunker. The driving ring is located on the bottom surface of the transmission outer gear ring. A motor is provided on the outer wall of the coal bunker at the position corresponding to the transmission outer gear ring. A driving gear is sleeved on the output shaft end of the motor. The driving gear meshes with the transmission outer gear ring for transmission.

2. The multi-angle coal bunker unblocking system according to claim 1, characterized in that, Each of the nozzle positions is provided with a first support seat on the outer wall of the coal bunker. A thrust ball bearing is embedded in the first support seat, and the other end face of the thrust ball bearing is embedded in the driven bevel gear.

3. The multi-angle coal bunker unblocking system according to claim 1, characterized in that, The coal bunker is equipped with several protective mechanisms, each located above the rotary paddle level gauge, to prevent material from colliding with the detection rod of the rotary paddle level gauge when it falls.

4. The multi-angle coal bunker unblocking system according to claim 2, characterized in that, Each coal bunker is equipped with an airflow transfer box above each of the rotary paddle level gauges. The airflow transfer box has an air distribution plate in the middle. The airflow transfer box has a third branch air passage connected to the main air pipe on one side of the air distribution plate. The top of the airflow transfer box away from the third branch air passage has several interlocking strips arranged along the first direction. The middle of the interlocking strips has a strip-shaped air outlet channel. The bottom of the airflow transfer box away from the third branch air passage has two symmetrical insertion tubes. The insertion tubes are evenly provided with side air outlets on the opposite sides.

5. The multi-angle coal bunker unblocking system according to claim 1, characterized in that, The second branch airway includes several airway branch structures connected to the nozzle, and a connecting pipe connecting each of the airway branch structures. Each airway branch structure is used for the installation of the intermediate pipe and the nozzle.

6. The multi-angle coal bunker unblocking system according to claim 5, characterized in that, The airway branch structure includes two straight tubes and a three-way tube. The two ends of the three-way tube are rotatably connected to the two straight tubes respectively, and the remaining end of the three-way tube is detachably connected to the intermediate tube.

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