Belt coal feeder and belt sandwich cleaning device thereof

Abstract

The application provides a belt type coal feeder and a belt sandwich cleaning device thereof, and relates to the field of coal production.The belt type coal feeder comprises a frame body, a conveying assembly is arranged on the frame body, a hopper assembly is vertically arranged above the conveying assembly, a sealing air assembly is arranged on one side of the conveying assembly, and a cleaning device is arranged in the conveying assembly.The application solves the possibility of powder returning of the coal feeder after coal feeding is interrupted, judges the air pressure in the coal feeder according to the opening and closing of the sealing air assembly, avoids blind adjustment of personnel, timely cleans the coal powder in the coal feeder when powder returning occurs, avoids the sliding phenomenon caused by the accumulation of coal powder in the coal feeder, reduces the possibility of the coal feeder being stuck by the coal powder, improves the transportation efficiency, guarantees the stable operation of the equipment, and eliminates the technical problem of the safety hazard of the coal feeder caused by the friction and heating of the coal powder in the coal feeder.

Description

Technical Field

[0001] This invention belongs to the field of coal production, specifically relating to a belt feeder and its belt interlayer cleaning device. Background Technology

[0002] A coal feeder is a mechanical device that can accurately adjust the coal feed rate of a coal mill according to load requirements. It is located between the raw coal hopper and the coal mill. In a direct-fired pulverizing system, the coal feed rate is directly adapted to the boiler load.

[0003] For positive pressure direct-fired pulverizing systems, if the pulverizer cylinder is connected to the atmosphere after the belt feeder stops supplying coal, coal dust in the pulverizer will be sent back into the feeder. If the feeder back dust fault is not detected in time and the feeder electric gate is not immediately shut off, a large amount of coal dust will accumulate in the feeder, especially in the feeder belt interlayer. A large amount of coal dust will block the rollers as the feeder rotates, causing the rollers to jam. In the later stages, a lot of manpower will be needed to clean the accumulated dust in the belt interlayer and at the rollers. In severe cases, it can cause the coal dust in the feeder to spontaneously combust and cause a fire.

[0004] Meanwhile, the sealing air inlet of the coal feeder is generally located below the inlet of the coal feeder body, and is equipped with a sealing air flange interface, which is connected to the sealing air duct. The sealing air is drawn from the cold air pressure at the outlet of the primary air fan. Since the sealing air inlet is installed at the bottom, it is easily blocked by coal dust accumulation, which affects the sealing effect. In addition, due to the limited adjustment measures of the sealing air pressure and air volume of the coal feeder, the internal pressure is uncertain. Therefore, when coal is cut off, the sealing air cannot accurately prevent the back-pulverization phenomenon. Summary of the Invention

[0005] The present invention provides a belt feeder and a belt interlayer cleaning device thereon to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention discloses a belt feeder, comprising: a frame, a conveying assembly on the frame, a hopper assembly vertically arranged above the conveying assembly, a sealing air assembly on one side of the conveying assembly, and a cleaning device inside the conveying assembly.

[0007] Preferably, the hopper assembly includes a storage cylinder, a supporting ridge fixed to the outside of the storage cylinder, a plurality of tube sleeves fixed to the supporting ridge, the tube sleeves being fitted over the storage cylinder, the supporting ridge being fixed to the conveying pipe, a hopper fixed above the storage cylinder, an inclined discharge port fixed through the front side of the storage cylinder, a conveying assembly below the inclined discharge port, a dust suppression structure above the inclined discharge port, a cleaning structure at the bottom of the storage cylinder, and a material interception structure inside the storage cylinder above the inclined discharge port.

[0008] Preferably, the material cutting structure includes two symmetrically arranged cutting plates, clamps fixed on the front and rear sides of the storage cylinder, the two cutting plates being slidably connected within the clamps and penetrating the storage cylinder, limit posts fixed at the top and bottom of the cutting plates, the limit posts being slidably connected within guide grooves on the clamps, and angled arms fixedly connected to the other side of each cutting plate, the angled arms being slidably connected within sliding sleeves, the sliding sleeves being fixed within the housing, and a guide rod fixed at the other end of the angled arms, the guide rod being slidably connected within a guide rail on the turntable, the turntable being rotatably connected to an electric rotating shaft, the electric rotating shaft being rotatably connected to the storage cylinder, and the housing being fixed to the storage cylinder and the clamps.

[0009] Preferably, the cleaning structure includes a telescopic rod fixed to the bottom of the storage cylinder, a cleaning inclined plate fixed to the working end of the telescopic rod, the cleaning inclined plate slidably connected inside the storage cylinder, the cleaning inclined plate and the mounting plate in contact with each other, the mounting plate fixed to the inlet end of the inclined discharge port, a receiving plate provided below the cleaning inclined plate, the receiving plate fixed on the storage cylinder, an electric rotating shaft two rotatably connected below the receiving plate, a swing plate fixed to the top of the electric rotating shaft two, and the receiving plate and the swing plate sliding against each other.

[0010] Preferably, the dust collection structure includes dust collection wing plates, which are located on both sides of the conveying component below the inclined discharge port. A dust collection U-tube is fixedly connected above the dust collection wing plates, and a dust blowing pipe is connected above the dust collection U-tube. The dust blowing pipe passes through and is fixed to the inclined discharge port. A dust blowing fan is fixed to one end of the dust blowing pipe, and a windproof plate is fixed to the other end of the dust blowing pipe. A dust baffle is hinged inside the dust blowing pipe and is located between the dust blowing fan and the dust collection U-tube.

[0011] Preferably, the sealing air assembly includes a sealing air duct, one end of which is connected to the side of the delivery duct via a flange, and the other end of which is connected to an air inlet. A sealing fan is installed on the sealing air duct, and a one-way valve is fixed at the air outlet of the sealing air duct. Several shielding blades are rotatably connected inside the air inlet, and each shielding blade has a handle fixed to its top. Each handle is hinged to a linkage rod, and a transmission rod is rotatably connected to the linkage rod. The other end of the transmission rod is rotatably connected to an angle adjustment handle, which is rotatably connected to the air inlet.

[0012] Preferably, the conveying assembly includes a conveying tube, with several rotating shafts rotatably connected inside the conveying tube. The rotating shafts are connected to each other via a conveyor belt. One end of the conveying tube is fixed with a drive output end connected to one of the rotating shafts. A storage cylinder is fixedly connected above the input end of the conveying tube, and a discharge cylinder is fixedly connected below the output end of the conveying tube. Two crossbars are fixedly arranged symmetrically front and rear inside the conveying tube. A front sliding sleeve and a rear sliding sleeve are slidably connected to each crossbar. A U-shaped frame is fixed between the two front sliding sleeves, and a scraper is fixed on the U-shaped frame. A front rotating shaft plate is rotatably connected to the outside of the front sliding sleeve, and a rear rotating shaft plate is rotatably connected to the outside of the rear sliding sleeve. The front rotating shaft plate and the rear rotating shaft plate are hinged to each other, and an electric brush roller shaft is rotatably connected at the hinge. A compression elastic element is provided between the rear sliding sleeve and the crossbar.

[0013] A belt conveyor cleaning device includes a fixed plate, several fixed plates are arranged between the conveyor belts, the fixed plates are fixed to the conveyor pipe, several sleeves are symmetrically fixed at the top and bottom and left and right of the fixed plate, and a bottom rod is slidably connected inside each sleeve. A compression elastic element is connected between the left and right bottom rods, and the other end of each bottom rod is hinged to a diagonal rod. The other ends of the two diagonal rods are respectively hinged to the left and right sides of a support plate. Diverting baffles are fixed on the side of the support plate below the fixed plate, and a bottom plate cleaning assembly is provided below the fixed plate.

[0014] Preferably, the bottom plate cleaning assembly includes a slide bar, which is fixed on both sides of the conveying tube compartment. A slider is slidably connected to each slide bar, and a card is hinged to the left and right sides of each slider. A cleaning rod is rotatably connected between the two sliders. A brush plate is fixed above and below the cleaning rod. A limiting rod is fixed to the conveying tube compartment above the slide bar. The limiting rod and the cleaning rod slide relative to each other. A flipping push rod is fixed at one end of the discharge cylinder of the conveying tube compartment, and an oblique flipping push rod is fixed at the other end of the conveying tube compartment.

[0015] Preferably, the powder blowing assembly includes an air conveying pipe that passes through and is fixed inside the conveying pipe compartment. The air conveying pipe is located on one side of the conveyor belt, and one end of the air conveying pipe is connected to a blower. A flat nozzle is connected to the air conveying pipe. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the hopper assembly of the present invention;

[0019] Figure 3 This is a schematic diagram of the material cutting structure of the present invention;

[0020] Figure 4 This is a cross-sectional view of section AA of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0022] Figure 6 This is a schematic diagram of the dust suppression structure of the present invention;

[0023] Figure 7 This is a schematic diagram of the structure of the sealing air assembly of the present invention. Figure 1 ;

[0024] Figure 8 This is a schematic diagram of the structure of the sealing air assembly of the present invention. Figure 2 ;

[0025] Figure 9 This is a schematic diagram of the conveying assembly of the present invention;

[0026] Figure 10 This is a schematic diagram of the cleaning device of the present invention.

[0027] In the diagram: 1. Frame; 2. Hopper assembly; 21. Storage cylinder; 22. Support ridge; 23. Sleeve; 24. Hopper; 25. Sloping discharge port; 3. Cutting structure; 31. Cutting plate; 32. Clamping plate; 33. Limiting post; 34. Guide groove; 35. Angle arm; 36. Sliding sleeve; 37. Housing; 38. Guide rod; 39. Turntable; 310. Guide rail; 311. Electric rotating shaft one; 4. Cleaning structure; 41. Expansion joint 42. Pole; 43. Cleaning ramp; 44. Laying plate; 45. Receiving plate; 46. Electric rotating shaft II; 5. Swing plate; 6. Dust suppression structure; 51. Dust collection wing plate; 52. Dust collection U-tube; 53. Dust blowing pipe; 54. Dust blowing fan; 55. Wind shield; 56. Dust baffle plate; 57. ; 6. Sealing air assembly; 61. Sealing air duct; 62. Air inlet; 63. Sealing fan; 64. One-way valve; 65. Shielding blade; 66. Throttle 67. Linkage rod; 68. Transmission rod; 69. Angle adjustment handle; 7. Conveying assembly; 71. Conveying tube; 72. Rotary shaft; 73. Conveyor belt; 74. Drive component; 75. Discharge cylinder; 76. Crossbar; 77. Front sliding sleeve; 78. Rear sliding sleeve; 79. U-shaped frame; 710. Scraper; 711. Front rotating shaft plate; 712. Rear rotating shaft plate; 713. Brush roller shaft; 714. Compression elastic element one; 8. Cleaning device; 1. Fixed plate; 82. Sleeve; 83. Base rod; 84. Compression elastic element II; 85. Diagonal rod; 86. Support plate; 87. Diverter baffle; 9. Bottom plate cleaning assembly; 91. Sliding rod; 92. Sliding block; 93. Card swipe; 94. Cleaning rod; 95. Brush plate; 96. Limiting rod; 97. Tilting push rod; 98. Diagonal tilting push rod; 10. Powder blowing assembly; 101. Air duct; 102. Air conveyor; 103. Flat nozzle. Detailed Implementation

[0028] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0029] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0030] The present invention provides the following embodiments.

[0031] Example 1

[0032] This invention provides a belt feeder and its belt interlayer cleaning device, such as... Figure 1-10 As shown, the belt feeder includes: a frame 1, a conveying assembly 7 on the frame 1, a hopper assembly 2 vertically above the conveying assembly 7, a sealing air assembly 6 on one side of the conveying assembly 7, and a cleaning device 8 inside the conveying assembly 7.

[0033] The working principle and beneficial effects of the above technical solution are as follows: the coal powder is temporarily stored in the hopper assembly 2 to ensure the continuous supply of the conveying assembly 7. The conveying assembly 7 stably and continuously conveys the coal powder into the coal mill. The sealing air assembly 6 is used to supply air pressure to the conveying assembly 7 to ensure that the conveying assembly 7 will not experience backflow due to low pressure. The cleaning device 8 is used to clean the coal powder in the conveying assembly 7 after backflow occurs.

[0034] This invention utilizes the sealing air assembly 6 to maintain the air pressure within the conveying assembly 7. After the coal feeder stops producing coal, the air intake of the sealing air assembly 6 is increased to balance the pressure within the coal mill, reducing the possibility of coal feeder backflow. The connection position between the sealing air assembly 6 and the conveying assembly 7 ensures that the sealing air assembly 6 will not be blocked when backflow occurs. Furthermore, the air pressure within the coal feeder can be judged based on the opening and closing status of the sealing air assembly 6, avoiding blind adjustments by personnel. Simultaneously, the cleaning device 8 can promptly clean the coal dust in the conveying assembly 7 when backflow occurs, preventing slippage caused by coal dust accumulation within the conveying assembly 7, reducing the possibility of the conveying assembly 7 being jammed by coal dust, improving transportation efficiency, ensuring stable equipment operation, and eliminating the safety hazard of coal dust rubbing and heating within the conveying assembly 7, which could cause a fire in the coal feeder.

[0035] Example 2

[0036] Based on embodiment 1, the hopper assembly 2 includes a storage cylinder 21, a supporting ridge 22 fixed outside the storage cylinder 21, a plurality of tube sleeves 23 fixed on the supporting ridge 22, the tube sleeves 23 being fitted over the storage cylinder 21, the supporting ridge 22 being fixed on the conveying tube 71, a hopper 24 fixed above the storage cylinder 21, an inclined discharge port 25 fixed through the front side of the storage cylinder 21, a conveying assembly 7 below the inclined discharge port 25, a dust suppression structure 5 above the inclined discharge port 25, a cleaning structure 4 at the bottom of the storage cylinder 21, and a material interception structure 3 inside the storage cylinder 21 above the inclined discharge port 25.

[0037] The working principle and beneficial effects of the above technical solution are as follows: Coal enters the storage cylinder 21 from the hopper 24. The coal in the storage cylinder 21 is conveyed to the conveying assembly 7 through the inclined discharge port 25 below. While the coal falls into the conveying assembly 7, it accumulates in the storage cylinder 21. The storage cylinder 21 is supported by the support ridge 22 as the main support. The sleeve 23 fixes the storage cylinder 21 to the support ridge 22. When the coal falls into the conveying assembly 7, coal dust is generated due to the drop. Therefore, the dust suppression structure 5 absorbs the coal dust. When the conveying assembly 7 stops conveying, the intercepting structure 3 intercepts the coal in the storage cylinder 21. After a long period of coal feeding, coal will adhere to the inside of the storage cylinder 21. The cleaning structure 4 cleans the coal in the storage cylinder 21.

[0038] This invention utilizes the material interception structure 3 to intercept the coal in the storage cylinder 21, preventing the coal from accumulating in the storage cylinder 21 after the conveying component 7 stops conveying, causing excessive pressure that could collapse the conveying component 7 and lead to a safety production accident. This ensures the safe operation of the coal feeder. Meanwhile, the cleaning structure 4 ensures unobstructed flow in the storage cylinder 21, preventing coal from continuously adhering to the storage cylinder 21 and clogging it, thus avoiding production stoppages and the hassle of cleaning. At the same time, the dust suppression structure 5 is designed to prevent coal ash from flying and accumulating in the conveying component 7 during the conveying process.

[0039] Example 3

[0040] Based on embodiment 2, the material cutting structure 3 includes two symmetrically arranged cutting plates 31. Clamping plates 32 are fixed on the front and rear sides of the storage cylinder 21 respectively. The two cutting plates 31 are slidably connected in the clamping plates 32 and pass through the storage cylinder 21. Limiting posts 33 are fixed at the top and bottom of the cutting plates 31. The limiting posts 33 are slidably connected in the guide grooves 34 on the clamping plates 32. Angle arms 35 are fixedly connected to the other side of the cutting plates 31. The angle arms 35 are slidably connected in the sliding sleeves 36. The sliding sleeves 36 are fixed in the housing 37. A guide rod 38 is fixed at the other end of the angle arms 35. The guide rod 38 is slidably connected in the guide rails 310 on the turntable 39. The turntable 39 is rotatably connected to the electric rotating shaft 311. The electric rotating shaft 311 is rotatably connected to the storage cylinder 21. The housing 37 is fixed to the storage cylinder 21 and the clamping plates 32.

[0041] The working principle and beneficial effects of the above technical solution are as follows: After the coal material accumulates in the storage cylinder 21, when it is necessary to cut the material, the electric rotating shaft 311 rotates and drives the turntable 39 to rotate. When the turntable 39 rotates, the guide rod 38 slides along the guide rail 310, which in turn drives the angle arm 35 to move along the sliding sleeve 36 towards the center of the turntable 39. The displacement of the angle arm 35 causes the cutting plate 31 to slide synchronously between the clamping plates 32 and move towards the center of the storage cylinder 21 until the two cutting plates 31 come into contact with each other. During the sliding process of the cutting plate 31, the limiting post 33 slides in the guide groove 34 to prevent the cutting plate 31 from deflecting.

[0042] The design of the guide rod 38 and guide rail 310 in this invention can effectively ensure that the angled arm 35 can reciprocate and retract, and the retraction process is stable with a large retraction torque, preventing the angled arm 35 from shaking and causing structural lock-up. At the same time, the design of the cutting plate 31 and clamping plate 32 can ensure the vertical stability of the cutting plate 31 during the sliding process, and the design of the limiting post 33 can ensure that the cutting plate 31 will not wobble left and right and cause jamming. The entire cutting structure can effectively stop the coal in the storage cylinder 21 while having good sealing performance, preventing the coal from leaking into the conveying component 7.

[0043] Example 4

[0044] Based on embodiment 2, the cleaning structure 4 includes a telescopic rod 41, which is fixed to the bottom of the storage cylinder 21. A cleaning inclined plate 42 is fixed to the working end of the telescopic rod 41. The cleaning inclined plate 42 is slidably connected inside the storage cylinder 21. The cleaning inclined plate 42 is in contact with the mounting plate 43. The mounting plate 43 is fixed to the inlet end of the inclined discharge port 25. A receiving plate 44 is provided below the cleaning inclined plate 42. The receiving plate 44 is fixed on the storage cylinder 21. An electric rotating shaft 45 is rotatably connected to the bottom of the receiving plate 44. A swing plate 46 is fixed to the top of the electric rotating shaft 45. The receiving plate 44 and the swing plate 46 slide against each other.

[0045] The working principle and beneficial effects of the above technical solution are as follows: When coal adheres to the storage cylinder 21, the telescopic joint rod 41 begins to extend and push the cleaning inclined plate 42 to slide along the inside of the storage cylinder 21, scraping off all the coal adhering to the storage cylinder 21 with the thrust. The scraped coal accumulates on the cleaning inclined plate 42 until all the coal ash in the storage cylinder 21 is removed. Then, the telescopic joint rod 41 retracts and drives the cleaning inclined plate 42 to descend. The cleaning inclined plate 42 descends to the inclined discharge port 25 and contacts the plate 43. The coal on the cleaning inclined plate 42 falls into the inclined discharge port 25. At the same time, during the cleaning process, the coal falls into the receiving plate 44 and gradually accumulates. Then, the electric rotating shaft 45 rotates and drives the swing plate 46 to rotate, pushing away the coal accumulated behind the telescopic joint rod 41. The coal slides down along the receiving plate 44.

[0046] This invention utilizes the design of the cleaning inclined plate 42 and the telescopic rod 41 to remove coal ash. This design scrapes off the coal ash, effectively preventing coal ash from adhering to the storage cylinder 21 and causing blockage. Furthermore, no coal ash is left in the corners of the storage cylinder 21 during the cleaning process. The coal ash accumulates on the cleaning inclined plate 42 during the cleaning process and can be uniformly dropped into the inclined discharge port 25. At the same time, after the scattered coal ash falls onto the receiving plate 44, the swing plate 46 can push away the coal ash behind the telescopic rod 41, preventing the coal ash from accumulating and becoming impossible to clean.

[0047] Example 5

[0048] Based on embodiment 2, the dust collection structure 5 includes a dust collection wing plate 51, which is located on both sides of the conveying component 7 below the inclined discharge port 25. A dust collection U-tube 52 is fixedly connected above the dust collection wing plate 51, and a dust blowing pipe 53 is connected above the dust collection U-tube 52. The dust blowing pipe 53 is fixed through and fixed on the inclined discharge port 25. A dust blowing fan 54 is fixed at one end of the dust blowing pipe 53, and a windproof plate 55 is fixed at the other end of the dust blowing pipe 53. A dust baffle plate 56 is hinged inside the dust blowing pipe 53 and is located between the dust blowing fan 54 and the dust collection U-tube 52.

[0049] The working principle and beneficial effects of the above technical solution are as follows: When coal falls onto the conveying component 7, coal splashes and generates coal dust. The dust collecting wing plate 51 collects the coal dust. The dust blower 54 starts to blow air into the dust blowing pipe 53. The air in the dust blowing pipe 53 flows, causing the air in the dust collecting U-pipe 52 to flow into the dust blowing pipe 53 under pressure. This causes the dust collecting wing plate 51 to generate suction force on the coal dust. The coal dust flows along the air into the dust collecting wing plate 51 and finally enters the dust blowing pipe 53. The coal dust hits the windproof plate 55 and falls into the inclined discharge port 25. When the dust blower 54 starts, the wind force drives the dust baffle plate 56 to rotate, ensuring the smooth flow of the pipeline. When the dust blower 54 stops, the dust baffle plate 56 automatically falls down to block the pipeline and prevent coal dust from entering the dust blower 54.

[0050] This invention utilizes the Bernoulli principle to extract coal ash through the design of the dust blowing pipe 53 and the dust blowing fan 54. This design can effectively collect coal ash while avoiding any impact on the dust blowing fan 54. At the same time, the design of the dust baffle 56 can block the coal ash outside the dust blowing fan 54, preventing it from drifting in when the dust blowing fan 54 is not working. The design of the wind shield 55 ensures that the coal ash does not fly around after exiting the dust blowing pipe 53.

[0051] Example 6

[0052] Based on Embodiment 1, the sealing air assembly 6 includes a sealing air duct 61. One end of the sealing air duct 61 is connected to the side of the delivery duct 71 via a flange, and the other end of the sealing air duct 61 is connected to an air inlet 62. A sealing fan 63 is provided on the sealing air duct 61, and a one-way valve 64 is fixed at the air outlet of the sealing air duct 61. Several shielding blades 65 are rotatably connected inside the air inlet 62. A handle 66 is fixed to the top of each shielding blade 65. A linkage rod 67 is hinged to each handle 66. A transmission rod 68 is rotatably connected to the linkage rod 67. The other end of the transmission rod 68 is rotatably connected to an angle adjustment handle 69, which is rotatably connected to the air inlet 62.

[0053] The working principle and beneficial effects of the above technical solution are as follows: the sealing air assembly 6 ensures that the air pressure generated in the conveying assembly 7 avoids the phenomenon of dust return. When the air pressure in the conveying assembly 7 needs to be changed, the rotation angle adjustment handle 69 is turned so that the transmission rod 68 pushes the linkage rod 67 to move. The displacement of the linkage rod 67 causes the handle 66 to pull the shielding leaf 65 to rotate, thereby making the gap between the shielding leaves 65 expand or shrink. The change in the gap of the shielding leaves 65 in the air inlet 62 changes the air intake of the sealing air duct 61. After being conveyed by the sealing fan 63, the air pressure at the air outlet changes. The one-way air valve 64 prevents the air outlet from generating back air and entering coal ash.

[0054] The present invention utilizes the design of the shielding leaf 65 to effectively adjust the air intake volume of the air inlet 62. By changing the air intake volume, the air pressure at the air outlet is adjusted, thus preventing the backflow of coal dust within the conveying assembly 7. Furthermore, the design of the angle adjustment handle 69, the linkage rod 67, and the transmission rod 68 enables precise adjustment of the air pressure. At the same time, the design of the sealed air duct 61 on the side of the conveying duct 71 prevents coal dust from clogging the air outlet when backflow occurs, and the one-way air valve 64 prevents coal dust from drifting into the sealed air duct 61.

[0055] Example 7

[0056] Based on Embodiment 1, the conveying assembly 7 includes a conveying tube 71, with several rotating shafts 72 rotatably connected inside the conveying tube 71. The rotating shafts 72 are connected to each other via a conveyor belt 73. A drive unit 74 is fixed at one end of the conveying tube 71, and its output end is connected to one of the rotating shafts 72. A storage cylinder 21 is fixedly connected above the input end of the conveying tube 71, and a discharge cylinder 75 is fixedly connected below the output end of the conveying tube 71. Two crossbars 76 are fixedly arranged symmetrically front to back inside the conveying tube 71. A front sliding sleeve 77 and a rear sliding sleeve 78 are slidably connected to the rod 76. A U-shaped frame 79 is fixed between the two front sliding sleeves 77. A scraper 710 is fixed on the U-shaped frame 79. A front rotating shaft plate 711 is rotatably connected to the outside of the front sliding sleeve 77. A rear rotating shaft plate 712 is rotatably connected to the outside of the rear sliding sleeve 78. The front rotating shaft plate 711 and the rear rotating shaft plate 712 are hinged to each other, and an electric brush roller shaft 713 is rotatably connected at the hinge. A compression elastic element 714 is provided between the rear sliding sleeve 78 and the crossbar 76.

[0057] The working principle and beneficial effects of the above technical solution are as follows: After the coal material enters the conveying pipe 71 from the hopper assembly 2, the coal material falls onto the conveyor belt 73. The conveyor belt 73 is driven by the rotating shaft 72. After the conveyor belt 73 conveys the coal material to the end, it falls into the discharge cylinder 75 below. After the conveyor belt 73 conveys the coal material, the scraper 710 scrapes off the coal material adhering to the conveyor belt 73. After passing through the scraper 710, the brush roller shaft 713 cleans the conveyor belt 73. The brush roller shaft 713 is adjusted by the front sliding sleeve 77 and the rear sliding sleeve 78. Under the action of the compression elastic element 714, the rear sliding sleeve 78 causes the brush roller shaft 713 to squeeze the conveyor belt 73.

[0058] This invention utilizes the conveying pipe 71 to transport coal. This design avoids pollution and spillage during the coal transportation process. Furthermore, the scraper 710 is designed to scrape away coal from the surface of the conveyor belt 73, preventing coal accumulation on the conveyor belt 73, which would increase the load on the conveyor belt 73 and reduce its conveying capacity. At the same time, the brush roller shaft 713 is designed to adapt to the conveyor belt 73, keeping the brush roller shaft 713 in close contact with the conveyor belt 73 at all times, effectively removing residual coal from the conveyor belt.

[0059] Example 8

[0060] Based on any one of embodiments 1-7, the cleaning device 8 includes a fixed plate 81, and several fixed plates 81 are provided between the conveyor belts 73. The fixed plates 81 are fixed on the conveyor tube 71. Several sleeves 82 are symmetrically fixed on the upper and lower sides and left and right sides of the fixed plate 81. A bottom rod 83 is slidably connected inside each sleeve 82. A compression elastic element 84 is connected between the left and right bottom rods 83. The other end of each bottom rod 83 is hinged to a diagonal rod 85. The other ends of the two diagonal rods 85 are respectively hinged to the left and right sides of the support plate 86. Diverting baffles 87 are fixed on the side of the support plate 86 below the fixed plate 81. A bottom plate cleaning assembly 9 is provided below the fixed plate 81.

[0061] The working principle and beneficial effects of the above technical solution are as follows: When coal dust returns, there is coal dust accumulation between the conveyor belts 73. The coal dust is removed by rotating the conveyor belts 73 in both directions. When the support plate 86 and the conveyor belt 73 are pressed against each other, the support plate 86 is displaced, and the inclined rod 85 rotates around the support plate 86, causing the bottom rod 83 to be displaced along the sleeve 82. The distance between the left and right bottom rods 83 changes, causing the compression elastic element 84 to expand and contract. When the conveyor belt 73 rotates, the support plate 86 and the diversion baffle 87 can be pressed tightly against the conveyor belt 73 and block the coal dust between the conveyor belts 73. Then the coal dust falls below under the action of gravity.

[0062] This invention utilizes the properties of triangles. When the connection between the inclined rod 85 and the support plate 86 shifts, the length of the bottom rod 83 changes accordingly. This ensures that the support plate 86 and the diversion baffle 87 are always in contact with the conveyor belt 73, guaranteeing that the coal dust between the conveyor belts 73 can be thoroughly cleaned. At the same time, the conveyor belt 73 and the bottom rod 83, as well as the inclined rod 85 and the support plate 86, maintain an adaptive state. After installation, if the tension of the conveyor belt 73 changes, no manual adjustment is required, reducing the maintenance difficulty of the equipment.

[0063] Example 9

[0064] Based on embodiment 8, the bottom plate cleaning assembly 9 includes a slide bar 91, which is fixed on both sides of the conveying tube 71. A slider 92 is slidably connected to each slide bar 91. A card 93 is hinged to the left and right sides of each slider 92. A cleaning rod 94 is rotatably connected between the two sliders 92. A brush plate 95 is fixed above and below the cleaning rod 94. A limiting rod 96 is fixed to the conveying tube 71 above the slide bar 91. The limiting rod 96 and the cleaning rod 94 slide relative to each other. A flipping push rod 97 is fixed at one end of the discharge cylinder 75 of the conveying tube 71, and an oblique flipping push rod 98 is fixed at the other end of the conveying tube 71.

[0065] The working principle and beneficial effects of the above technical solution are as follows: When coal powder accumulates on the bottom plate of the conveying pipe silo 71, the electric slider 92 slides on the slide rod 91, driving the cleaning rod 94 to move. Since the cleaning rod 94 is octagonal, the limiting rod 96 is close to the top of the cleaning rod to restrict it, so that the cleaning rod cannot rotate during the displacement. At the same time, the brush plate 95 pushes the coal powder on the bottom plate of the conveying pipe silo 71 to the discharge cylinder 75. When the electric slider 92 reaches the discharge cylinder 75, the flip push rod 97 pushes the brush plate 95 to make the cleaning rod 94 rotate 90°. After that, the brush plate 95 disengages from the bottom plate of the conveying pipe silo 71, and the electric slider 92 resets and moves to the other end of the conveying pipe silo 71. After the electric slider 92 moves to the other end of the conveying pipe silo 71, the oblique flip push rod 98 pushes the brush plate 95 to flip 90° again, so that the brush plate 95 contacts the bottom plate of the conveying pipe silo 71 again to push the coal powder. When the electric slider 92 slides, the brush 93 cleans the slide rod 91.

[0066] This invention utilizes an electric slider 92 and a slide bar 91 to achieve reciprocating motion to remove coal dust. This design ensures stable operation in a coal dust environment and rapid response. At the same time, the design of the cleaning rod 94 and the brush plate 95 ensures that the coal dust is pushed forward and will not be pushed back when reversing.

[0067] Example 10

[0068] Based on embodiment 8, the powder blowing assembly 10 includes an air conveying pipe 101, which passes through the conveying pipe compartment 71 and is fixed inside the conveying pipe compartment 71. The air conveying pipe 101 is located on one side of the conveyor belt 73. One end of the air conveying pipe 101 is connected to a blower 102, and a flat nozzle 103 is connected to the air conveying pipe 101.

[0069] The working principle and beneficial effects of the above technical solution are as follows: when there is coal powder between the conveyor belt 73 and the rotating shaft 72, the blower 102 starts to supply air to the air pipe 101, and the flat nozzle 103 uses wind power to blow the coal powder between the conveyor belt 73 and the rotating shaft 72 off.

[0070] This invention utilizes wind power to remove coal dust between the conveyor belt 73 and the rotating shaft 72. This design ensures that slippage between the conveyor belt 73 and the rotating shaft 72 is avoided, reduces the amount of coal dust blocking the rotation of the conveyor belt 73 and the rotating shaft 72, reduces the possibility of friction heating and fire of the rotating shaft 72, and ensures the safety and stability of coal dust transportation.

[0071] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A belt feeder, characterized in that, include: There is a frame (1), a conveying assembly (7) is provided on the frame (1), a hopper assembly (2) is vertically provided above the conveying assembly (7), a sealing air assembly (6) is provided on one side of the conveying assembly (7), and a cleaning device (8) is provided inside the conveying assembly (7). The sealing air assembly (6) includes a sealing air duct (61), one end of which is connected to the side of the delivery duct (71) via a flange, and the other end of which is connected to an air inlet (62). A sealing fan (63) is provided on the sealing air duct (61), and a one-way valve (64) is fixed at the air outlet of the sealing air duct (61). Several shielding blades (65) are rotatably connected inside the air inlet (62), and a handle (66) is fixed at the top of each shielding blade (65). A linkage rod (67) is hinged to each handle (66), and a transmission rod (68) is rotatably connected to the linkage rod (67). The other end of the transmission rod (68) is rotatably connected to an angle adjustment handle (69), and the angle adjustment handle (69) is rotatably connected to the air inlet (62). The conveying assembly (7) includes a conveying tube (71), with several rotating shafts (72) rotatably connected inside the conveying tube (71). The rotating shafts (72) are connected to each other by a conveyor belt (73). A drive unit (74) is fixed at one end of the conveying tube (71), and its output end is connected to one of the rotating shafts (72). A storage cylinder (21) is fixedly connected above the input end of the conveying tube (71), and a discharge cylinder (75) is fixedly connected below the output end of the conveying tube (71). Two crossbars (76) are fixedly arranged symmetrically in front and behind inside the conveying tube (71). Both crossbars (76) are... A front sliding sleeve (77) and a rear sliding sleeve (78) are slidably connected. A U-shaped frame (79) is fixed between the two front sliding sleeves (77). A scraper (710) is fixed on the U-shaped frame (79). A front rotating shaft plate (711) is rotatably connected to the outside of the front sliding sleeve (77). A rear rotating shaft plate (712) is rotatably connected to the outside of the rear sliding sleeve (78). The front rotating shaft plate (711) and the rear rotating shaft plate (712) are hinged to each other, and an electric brush roller shaft (713) is rotatably connected at the hinge. A compression elastic element (714) is provided between the rear sliding sleeve (78) and the crossbar (76). The cleaning device (8) includes a fixed plate (81), and several fixed plates (81) are provided between the conveyor belts (73). The fixed plates (81) are fixed on the conveyor tube (71). Several sleeves (82) are symmetrically fixed on the upper and lower sides and left and right sides of the fixed plate (81). The bottom rods (83) are slidably connected inside the sleeves (82). The two bottom rods (83) are connected to the compression elastic element (84). The other end of the bottom rods (83) is hinged to the inclined rod (85). The other ends of the two inclined rods (85) are respectively hinged to the left and right sides of the support plate (86). The side of the support plate (86) below the fixed plate (81) is fixed with a diversion baffle (87). The bottom plate cleaning assembly (9) is provided below the fixed plate (81). The connection position between the sealing air assembly and the conveying assembly ensures that the sealing air assembly will not be blocked when back dust occurs, and the air pressure inside the coal feeder is judged based on the opening and closing of the sealing air assembly. The cleaning device can clean the coal dust in the conveying components in a timely manner when coal dust returns, thus preventing slippage caused by the accumulation of coal dust in the coal feeder conveying components. The hopper assembly (2) includes a storage cylinder (21), and a cutting structure (3) is provided inside the storage cylinder (21). The cutting structure (3) includes two cutting plates (31) arranged symmetrically front and back. Clamping plates (32) are fixed on the front and back sides of the storage cylinder (21). The two cutting plates (31) are slidably connected in the clamping plates (32) and pass through the storage cylinder (21). Limiting posts (33) are fixed at the top and bottom of the cutting plates (31). The limiting posts (33) are slidably connected in the guide grooves (34) on the clamping plates (32). On the other side, a folding arm (35) is fixedly connected. The folding arm (35) is slidably connected in the sliding sleeve (36). The sliding sleeve (36) is fixed in the housing (37). The other end of the folding arm (35) is fixed with a guide rod (38). The guide rod (38) is slidably connected in the guide rail (310) on the turntable (39). The turntable (39) is rotatably connected to the electric rotating shaft (311). The electric rotating shaft (311) is rotatably connected to the storage cylinder (21). The housing (37) is fixed on the storage cylinder (21) and the clamping plate (32).

2. The belt feeder according to claim 1, characterized in that: A support ridge (22) is fixed outside the storage cylinder (21), and several tube sleeves (23) are fixed on the support ridge (22). The tube sleeves (23) are fitted outside the storage cylinder (21). The support ridge (22) is fixed on the conveying tube (71). A hopper (24) is fixed above the storage cylinder (21). An inclined discharge port (25) is fixed through the front side of the storage cylinder (21). A conveying assembly (7) is provided below the inclined discharge port (25). A dust suppression structure (5) is provided above the inclined discharge port (25). A cleaning structure (4) is provided at the bottom of the storage cylinder (21).

3. A belt feeder according to claim 2, characterized in that: The cleaning structure (4) includes a telescopic rod (41), which is fixed at the bottom of the storage cylinder (21). A cleaning inclined plate (42) is fixed at the working end of the telescopic rod (41). The cleaning inclined plate (42) is slidably connected inside the storage cylinder (21). The cleaning inclined plate (42) is in contact with the ramp (43). The ramp (43) is fixed at the inlet end of the inclined discharge port (25). A receiving plate (44) is provided below the cleaning inclined plate (42). The receiving plate (44) is fixed on the storage cylinder (21). An electric rotating shaft (45) is rotatably connected below the receiving plate (44). A swing plate (46) is fixed at the top of the electric rotating shaft (45). The receiving plate (44) and the swing plate (46) slide against each other.

4. A belt feeder according to claim 2, characterized in that: The dust collection structure (5) includes a dust collection wing plate (51), which is located on both sides of the conveying component (7) below the inclined discharge port (25). A dust collection U-tube (52) is fixedly connected above the dust collection wing plate (51), and a dust blowing pipe (53) is connected above the dust collection U-tube (52). The dust blowing pipe (53) is fixed through the inclined discharge port (25), and a dust blowing fan (54) is fixed at one end of the dust blowing pipe (53). A windproof plate (55) is fixed at the other end of the dust blowing pipe (53). A dust baffle plate (56) is hinged inside the dust blowing pipe (53), and the dust baffle plate (56) is located between the dust blowing fan (54) and the dust collection U-tube (52).

5. A belt feeder according to claim 1, characterized in that: The bottom plate cleaning assembly (9) includes a slide bar (91), which is fixed on both sides of the conveying tube (71). A slider (92) is slidably connected to each slide bar (91). A card (93) is hinged to each side of the slider (92). A cleaning rod (94) is rotatably connected between the two sliders (92). A brush plate (95) is fixed above and below the cleaning rod (94). A limiting rod (96) is fixed on the conveying tube (71) above the slide bar (91). The limiting rod (96) and the cleaning rod (94) slide relative to each other. A flipping push rod (97) is fixed at one end of the discharge cylinder (75) of the conveying tube (71), and an oblique flipping push rod (98) is fixed at the other end of the conveying tube (71).

6. A belt feeder according to claim 1, characterized in that: The powder blowing assembly (10) includes an air conveying pipe (101), which passes through the conveying pipe compartment (71) and is fixed inside the conveying pipe compartment (71). The air conveying pipe (101) is located on one side of the conveyor belt (73), and one end of the air conveying pipe (101) is connected to a blower (102). A flat nozzle (103) is connected to the air conveying pipe (101).

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