Online screening and detecting device for granularity of blast furnace injection pulverized coal

Abstract

The utility model discloses an on-line screening detection device for the granularity of blast furnace injection pulverized coal, and relates to the technical field of blast furnace injection pulverized coal detection devices. The device comprises a coal conveying pipeline, a detection cabinet and a control cabinet, the coal conveying pipeline is provided with a sampler, the discharge end of the sampler is connected with a conveying pipe, the conveying pipe is provided with a cleaning assembly, the end, away from the sampler, of the conveying pipe is connected into the detection cabinet, and the control cabinet is connected with the detection cabinet. A return pipe is arranged between the discharge part of the detection cabinet and the coal conveying pipeline, and the control cabinet is electrically connected with the detection cabinet; the surface of the conveying pipe can be repeatedly beaten through the beating plate, it is guaranteed that attached pulverized coal impurities fall off, the air blowing pump is arranged to blow air back, the pulverized coal impurities are discharged through the discharging valve to complete cleaning, the inner wall of the conveying pipe can be greatly treated through the operation, and the conveying pipe is prevented from being damaged. And the influence on the accuracy of online detection caused by the fact that the pulverized coal is subsequently brought into the detection cabinet due to excessive attachment is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace coal powder injection detection devices, in particular to an online screening detection device for blast furnace coal powder injection particle size. Background Art

[0002] Over the past half century since blast furnace pulverized coal injection (BFI) products have been widely used in industry, market demand has gradually expanded with the increasing domestic steel production capacity and the continuous advancement and improvement of key BFI technologies. In particular, with the increasing scarcity of high-quality coking coal resources in China, the importance of BFI coal in the steelmaking process has been increasing. During the production process, BFI coal pulverized coal now requires online screening and testing of its particle size to ensure that subsequent production meets the required specifications.

[0003] When testing the particle size of coal powder online, the coal powder sampler takes samples in the coal conveying pipeline, and then inputs them into the detection cabinet through the conveying pipe for coal powder system testing. Subsequently, an online test is completed in the coal conveying pipeline through the return pipe. However, during long-term operation, it is necessary to clean the inner wall of the conveying pipe entering the detection cabinet to prevent excessive impurities from adhering to the inner wall of the pipeline during the transportation of coal powder, which will be brought into the detection cabinet later and affect the accuracy of the test. Utility Model Content

[0004] In order to solve the above problems, the purpose of the present invention is to provide an online screening and detection device for the particle size of pulverized coal injected into a blast furnace.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: an online screening and detection device for the particle size of pulverized coal injected into a blast furnace, the screening and detection device comprising a coal conveying pipeline, a detection cabinet and a control cabinet, a sampler is installed on the coal conveying pipeline, a delivery pipe is connected to the discharge end of the sampler, a cleaning assembly is provided on the delivery pipe, an end of the delivery pipe away from the sampler is connected to the detection cabinet, a return pipe is provided between the discharge end of the detection cabinet and the coal conveying pipeline, and the control cabinet is electrically connected to the detection cabinet;

[0006] The cleaning assembly includes an air pump, which is installed at one end of the delivery pipe away from the sampler, and a discharge valve is installed at the end of the delivery pipe away from the air pump. A mounting block is installed on the delivery pipe, and grooves are provided at the upper and lower ends of the mounting block. Two symmetrically distributed rotating columns are rotated in the grooves, and a knocking plate is fixed on the rotating column. The end of the knocking plate is arranged in an arc shape. One end of the rotating column passes through the mounting block and is fixed with a driving gear. The driving gears on the two adjacent rotating columns are meshed and connected, and a driving drive assembly is provided on the side wall of the mounting block away from the driving gear.

[0007] The two gears of the two said first and second gears are connected with each other through the gear train of the two said first and second gears and the two gears are connected with each other through the gear train of the two said second gears and the two gears are connected with each other through the gear train of the two said second gears.

[0008] Compared with the prior art, the beneficial effects of the present invention are:

[0009] The knocking plate provided in the utility model can knock the surface of the conveying pipe repeatedly to ensure that the attached coal powder impurities fall off. Subsequently, an air pump is provided to back-blow gas, and the coal powder impurities are discharged through the discharge valve to complete the cleaning. Through the above operation, the inner wall of the conveying pipe can be greatly processed to prevent excessive attachment of coal powder, which will be subsequently brought into the detection cabinet and affect the accuracy of online detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0012] Figure 2 This is a schematic diagram of the cleaning component structure of the utility model.

[0013] Figure 3 This is a schematic diagram of the installation block structure of the utility model.

[0014] Figure 4 This is a schematic diagram of the connecting plate structure of the utility model.

[0015] In the figure: 1. Coal conveying pipeline; 11. Sampler; 12. Conveying pipe; 13. Detection cabinet; 14. Return pipe; 15. Control cabinet; 2. Air pump; 21. Discharge valve; 3. Mounting block; 31. Groove; 32. Rotating column; 33. Drive gear; 34. Beating plate; 35. Protective cushion; 36. Rotating shaft; 37. First gear; 38. Rotating rod; 39. Second gear; 4. Connecting plate; 41. Teeth; 42. Tooth plate; 43. Movable plate; 44. Movable groove; 45. Moving rod; 46. Rotating plate; 47. Drive rod; 5. Drive motor; 51. Protective cover; 52. Support frame. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] Example: Figure 1-4 As shown, the utility model provides an online screening and detection device for the particle size of pulverized coal injected into a blast furnace. The screening and detection device includes a coal conveying pipeline 1, a detection cabinet 13 and a control cabinet 15. A sampler 11 is installed on the coal conveying pipeline 1. The discharge end of the sampler 11 is connected to a conveying pipe 12. The conveying pipe 12 is provided with a cleaning component. The end of the conveying pipe 12 away from the sampler 11 is connected to the detection cabinet 13. The detection cabinet 13 includes a host and a sample dispersion system. A return pipe 14 is provided between the discharge end of the detection cabinet 13 and the coal conveying pipeline 1. The control cabinet 15 is electrically connected to the detection cabinet 13. The control cabinet 15 includes an industrial computer, a PLC, an air distribution system, and a data transmission system. The control cabinet 15 is used for automatic control and data processing of on-site tests and has a remote communication interface. Data can be exchanged with a central control room through an optical cable. An integrated industrial computer is used to collect and process data and display the particle size distribution of online particles in real time. The controller adopts a PLC.

[0018] The cleaning component includes an air blowing pump 2, which is installed at one end of the delivery pipe 12 away from the sampler 11. It is worth noting that the back-blowing gas uses cold dry gas, which can ensure that the pipeline is always kept in a low temperature state, effectively preventing the occurrence of safety accidents. A discharge valve 21 is installed at one end of the delivery pipe 12 away from the air blowing pump 2, and a mounting block 3 is installed on the delivery pipe 12. Grooves 31 are provided at the upper and lower ends of the mounting block 3. Two symmetrically distributed rotating columns 32 are arranged for rotation in the groove 31. A knocking plate 34 is fixed on the rotating column 32, and the end of the knocking plate 34 is arranged in an arc shape. One end of the rotating column 32 passes through the mounting block 3 and is fixed with a driving gear 33. The driving gears 33 on the two adjacent rotating columns 32 are meshed and connected. The two adjacent rotating columns 32 are connected by the meshing driving gear 33, so that the knocking plates 34 on the two rotating columns 32 can work simultaneously towards or back to back, and a driving drive assembly is provided on the side wall of the mounting block 3 away from the driving gear 33.

[0019] A protective cushion 35 is installed at the end of the knocking plate 34 , and the protective cushion 35 can prevent the knocking plate 34 from being damaged by excessive hard contact with the delivery pipe 12 .

[0020] The drive assembly includes a rotating shaft 36, and the rotating shaft 36 is provided with two, and the rotating shaft 36 is respectively fixed on one of the rotating columns 32 at the upper and lower ends, and the two rotating shafts 36 are diagonally arranged. The two rotating shafts 36 are fixed with a first gear 37 at one end away from the mounting block 3, and a rotating rod 38 is rotatably provided at the middle end of the outer wall of the mounting block 3 near the rotating shaft 36. Two second gears 39 are fixed on the rotating rod 38. Two connecting plates 4 are provided with diagonally distributed arrangements near the second gear 39 of the mounting block 3. Both sides of the connecting plate 4 are fixed with diagonally distributed teeth 41. The teeth 41 on the two connecting plates 4 are meshed together and arranged on the second gear 39. The two connecting plates 4 are meshed with the second gear 39 at one end away from the second gear 39 through the teeth 41. When the second gear 39 is driven by the rotating rod 38 to drive the two connecting plates 4 to move back or toward each other at the same time, the rotating columns 32 at the upper and lower ends can be driven to rotate at the same time, so that the knocking plate 34 knocks on the conveying pipe 12, knocking off the coal powder on the inner wall of the conveying pipe 12.

[0021] A horizontally arranged toothed plate 42 is engaged below the second gear 39 away from the mounting block 3, and a movable plate 43 is fixedly provided at the bottom of the toothed plate 42. A movable groove 44 is penetrated through the movable plate 43, and a moving rod 45 is movably inserted in the movable groove 44. A rotating plate 46 is fixed at one end of the movable rod 45 away from the movable groove 44, and a driving rod 47 is fixed at one end of the rotating plate 46 away from the moving rod 45. When the driving rod 47 passes through the rotating plate 46, the moving rod 45 pushes the movable plate 43 to move back and forth repeatedly, so that the toothed plate 42 fixed on the top of the movable plate drives the second gear 39 to rotate repeatedly, and the second gear 39 drives the connecting plate 4 engaged with it to repeatedly move toward or away from each other, thereby controlling the forward and reverse rotation of the first gear 37, and finally causing the knocking plate 34 on the rotating column 32 to repeatedly knock the side wall of the conveying pipe 12, causing it to vibrate.

[0022] A drive motor 5 is fixedly installed on the side wall of the mounting block 3 near the drive rod 47, and the output end of the drive motor 5 is coaxially fixed on the drive rod 47. The set drive motor 5 can provide power for the knocking plate 34 in the cleaning assembly to facilitate the staff to operate. A support frame 52 is fixed on the outside of the protective cover 51 near the drive motor 5, and the drive motor 5 is fixed on the support frame 52. The set support frame 52 supports the drive motor 5 so that it can rotate stably.

[0023] A protective cover 51 is fixedly provided on the side wall of the mounting block 3 near the connecting plate 4. The connecting plate 4 and the first gear 37 are both located inside the protective cover 51. The rotating rod 38 rotates and passes through the protective cover 51. The movable plate 43 slides horizontally on the side wall of the protective cover 51. The protective cover 51 protects the connecting plate 4 and the first gear 37, and at the same time ensures that the components driven by the rotating rod 38 and the second gear 39 can rotate stably. At the same time, the movable plate 43 is slidably set on the side wall of the protective cover 51, so that the movable plate 43 can move back and forth stably when driven, thereby improving the stability of the operation.

[0024] Working principle: When cleaning the conveying pipe 12, the driving motor 5 first drives the driving rod 47 to rotate, and the driving rod 47 drives the rotating plate 46 to make the moving rod 45 continuously rotate in the movable groove 44. At this time, the moving rod 45 will push the movable plate 43 to move back and forth repeatedly, so that the toothed plate 42 fixed on the top of the movable plate 43 drives the second gear 39 to rotate repeatedly, and the second gear 39 drives the two connecting plates 4 meshed with it to move repeatedly toward or back to each other. At this time, the connecting plate 4 will control the first gear 37 to rotate forward and backward. At the same time, since the two adjacent rotating columns 32 are connected by the driving gear 33, the rotating column 32 can be driven to drive the knocking plate 34 to repeatedly knock the side wall of the conveying pipe 12, causing it to vibrate, thereby causing the coal powder attached to the inner wall of the conveying pipe 12 to fall off. At the same time, the air pump 2 blows back the gas, causing the gas to move along the conveying pipe 12, and finally the coal powder impurities are discharged through the discharge valve 21 to complete the cleaning.

[0025] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. An online screening and detection device for blast furnace injected coal powder particle size, characterized in that: The screening detection device comprises a coal conveying pipeline (1), a detection cabinet (13) and a control cabinet (15); a sampler (11) is installed on the coal conveying pipeline (1); a delivery pipe (12) is connected to the discharge end of the sampler (11); a cleaning assembly is provided on the delivery pipe (12); an end of the delivery pipe (12) away from the sampler (11) is connected to the detection cabinet (13); a return pipe (14) is provided between the discharge end of the detection cabinet (13) and the coal conveying pipeline (1); and the control cabinet (15) is electrically connected to the detection cabinet (13); The cleaning component includes an air pump (2), which is installed at one end of the delivery pipe (12) away from the sampler (11), and a discharge valve (21) is installed at the end of the delivery pipe (12) away from the air pump (2). A mounting block (3) is installed on the delivery pipe (12), and grooves (31) are provided at the upper and lower ends of the mounting block (3). Two symmetrically distributed rotating columns (32) are rotatably provided in the groove (31), and a knocking plate (34) is fixed on the rotating column (32). The end of the knocking plate (34) is arranged in an arc shape. One end of the rotating column (32) passes through the mounting block (3) and is fixed with a driving gear (33). The driving gears (33) on the two adjacent rotating columns (32) are meshed and connected. A driving assembly is provided on the side wall of the mounting block (3) away from the driving gear (33).

2. The device for online screening and detecting particle size of pulverized coal injected into a blast furnace according to claim 1, characterized in that: A protective cushion (35) is installed at the end of the knocking plate (34).

3. The device for online screening and detecting particle size of pulverized coal injected into a blast furnace according to claim 1, characterized in that: The driving assembly includes a rotating shaft (36), wherein two rotating shafts (36) are respectively fixed on one of the rotating columns (32) located at the upper and lower ends and are diagonally arranged between the two rotating shafts (36), a first gear (37) is fixedly provided at one end of the two rotating shafts (36) away from the mounting block (3), a rotating rod (38) is rotatably provided at the middle end of the outer wall of the mounting block (3) close to the rotating shaft (36), two second gears (39) are fixed on the rotating rod (38), two connecting plates (4) arranged diagonally are provided at the second gear (39) close to the mounting block (3), teeth (41) arranged diagonally are fixed on both sides of the connecting plate (4), the teeth (41) on the two connecting plates (4) are meshed together on the second gear (39), and the two connecting plates (4) are meshed with the second gear (39) through the teeth (41) at one end away from the second gear (39).

4. The device for online screening and detecting particle size of pulverized coal injected into a blast furnace according to claim 3, characterized in that: A horizontally arranged tooth plate (42) is engaged below the second gear (39) away from the mounting block (3), a movable plate (43) is fixedly provided at the bottom of the tooth plate (42), a movable groove (44) is penetrated through the movable plate (43), a movable rod (45) is movably inserted into the movable groove (44), a rotating plate (46) is fixedly provided at one end of the movable rod (45) away from the movable groove (44), and a driving rod (47) is fixedly provided at one end of the rotating plate (46) away from the movable rod (45).

5. The device for online screening and detecting particle size of pulverized coal injected into a blast furnace according to claim 3, characterized in that: A drive motor (5) is fixedly mounted on the side wall of the mounting block (3) near the drive rod (47), and the output end of the drive motor (5) is coaxially fixed to the drive rod (47).

6. The device for online screening and detecting particle size of pulverized coal injected into a blast furnace according to claim 4, characterized in that: A protective cover (51) is fixedly provided on the side wall of the mounting block (3) near the connecting plate (4); the connecting plate (4) and the first gear (37) are both located in the protective cover (51); the rotating rod (38) rotates through the protective cover (51); and the movable plate (43) is horizontally slidably provided on the side wall of the protective cover (51).

7. The device for online screening and detecting particle size of pulverized coal for blast furnace injection according to claim 6, characterized in that: A support frame (52) is fixedly provided on the outside of the protective cover (51) near the drive motor (5), and the drive motor (5) is fixed on the support frame (52).

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