Boiler raw coal bunker anti-blocking device

Abstract

The utility model is suitable for the technical field of raw coal bunker blocking prevention, and provides a boiler raw coal bunker blocking prevention device which comprises a boiler raw coal bunker body. The upper supporting frame and the lower supporting frame are fixed to the inner side wall of the boiler raw coal bin body through bolts, and the upper supporting frame is located above the lower supporting frame; the three-phase asynchronous motor is fixed at the central position of the top of the upper support frame through a bolt; the rotating shaft is fixed at the output end of the three-phase asynchronous motor; the upper scraping plate, the middle scraping plate and the lower scraping plate are fixed on the outer side wall of the rotating shaft through screws; blockage clearing in the raw coal bunker body of the boiler and overall dredging of coal flow are achieved through three-scraper type rotation, the lower scraper extends to the position below the inserting plate door, the situation that coal adheres to the lower portion of the inserting plate door and the raw coal bunker is blocked is avoided, the V-shaped plate moves in a reciprocating mode along the straight line, raw coal in the raw coal bunker body of the boiler can be swept, the area of a blockage clearing area is increased, and the blockage clearing efficiency is improved. And therefore, the tight raw coal is loosened in a large range, and falling of the raw coal is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of raw coal bunker anti-blocking, in particular to a boiler raw coal bunker anti-blocking device. Background Art

[0002] Due to the constant change of coal types in the raw coal bunker of thermal power plant boilers, economic coal, sludge, and high-moisture raw coal are added to the raw coal, which causes frequent coal blockage and coal overflow during use. Coal blockage in the raw coal bunker causes coal shortage in the grinding group, seriously affecting the stable operation of the unit. Therefore, when the raw coal bunker is blocked, it is necessary to frequently clear the blockage and clear the bunker. Manual clearing and clearing of the bunker is a job with greater safety risks and poses a greater safety hazard.

[0003] Therefore, a boiler raw coal bunker anti-blocking device is proposed. Utility Model Content

[0004] The utility model provides a boiler raw coal bunker anti-blocking device, aiming to solve the above-mentioned problem.

[0005] The utility model is implemented as follows: a boiler raw coal bunker anti-blocking device comprises: a boiler raw coal bunker body; an upper support frame and a lower support frame fixed to the inner wall of the boiler raw coal bunker body by bolts, the upper support frame being located above the lower support frame; a three-phase asynchronous motor fixed to the center position of the top of the upper support frame by bolts; a rotating shaft fixed to the output end of the three-phase asynchronous motor; an upper scraper, a middle scraper and a lower scraper fixed to the outer wall of the rotating shaft by screws, the middle scraper being located between the upper scraper and the lower scraper; a first electric push rod fixed to the inside of the upper scraper and the middle scraper by bolts; a moving block fixed to the output end of the first electric push rod; a straight plate fixed to the top of the moving block by screws ; V-shaped plate welded to the top of the straight plate; through grooves are provided on the top of the upper scraper and the middle scraper near the outer side of the straight plate; movable grooves are provided at the bottom of the through grooves near the outer side of the moving block; inner cavities are provided inside the upper scraper and the middle scraper near one side of the moving block; inclined surfaces are provided on the inner side walls of the through grooves; valve seats are fixed to the outer side wall of the boiler raw coal bin near the upper side of the lower scraper by bolts; a second electric push rod is fixed to the outer side wall of the valve seat by bolts; a plug-in door is fixed to the output end of the second electric push rod; a semicircular groove is provided on the outer wall of one side of the plug-in door near the outer side of the rotating shaft; an air hammer vibrator is provided on the inner wall of the boiler raw coal bin.

[0006] Preferably, the outer side wall of the boiler raw coal bunker adopts a hyperbolic design.

[0007] Preferably, the bottom end of the rotating shaft is rotatably connected to the top of the lower support frame.

[0008] Preferably, the top of the lower scraper is in contact with the bottom of the sliding door.

[0009] Preferably, the straight plate and the V-shaped plate are combined to form a triangular frame structure, and the straight plate and the through groove match and fit together.

[0010] Preferably, the through groove and the inner cavity are both communicated with the movable groove.

[0011] Preferably, there are two of each of the upper scraper, the middle scraper and the lower scraper, and the two upper scrapers, the two middle scrapers and the two lower scrapers are symmetrically arranged on the outer side wall of the rotating shaft.

[0012] Preferably, the rotating shaft passes through the semicircular groove, and the outer side wall of the rotating shaft fits against the inner side wall of the semicircular groove.

[0013] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0014] The three-scraper rotation is used to clear the blockage inside the boiler raw coal bunker, dredge the coal flow as a whole, and extend the lower scraper to under the plug-in door to avoid coal sticking to the lower part of the plug-in door, which causes coal blockage in the raw coal bunker. The V-shaped plate moves back and forth in a straight line to sweep the raw coal in the boiler raw coal bunker, increase the area of ​​the clearing zone, and loosen the compacted raw coal on a large scale, making it easier for the raw coal to fall. There is no need for manual clearing and clearing of the bunker, which is a job with higher safety risks and poses greater safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the rotating shaft structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the explosion of the upper scraper of the utility model;

[0018] Figure 4 This is a schematic diagram of the valve seat structure of the utility model;

[0019] Figure 5 It is a cross-sectional view of the upper scraper of the present utility model.

[0020] In the figure: 1. Boiler raw coal bunker; 2. Upper support frame; 3. Lower support frame; 4. Three-phase asynchronous motor; 5. Rotating shaft; 6. Upper scraper; 7. Middle scraper; 8. Lower scraper; 9. First electric push rod; 10. Moving block; 11. Straight plate; 12. V-shaped plate; 13. Through groove; 14. Movable groove; 15. Inner cavity; 16. Inclined surface; 17. Valve seat; 18. Second electric push rod; 19. Slot door; 20. Semicircular groove; 21. Air hammer vibrator. DETAILED DESCRIPTION

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting upon the application; the terms "comprising," "including," and "having," and variations thereof, as used in enrolling and claims herein, are intended to be open-ended and to mean including, but not limited to; the terms "first," "second," and the like, as used in the description herein, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

[0022] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of other embodiments. It is expressly understood that the embodiments described herein are merely examples from a whole class of comparable embodiments which those skilled in the art will readily appreciate.

[0023] The utility model embodiment provides a kind of boiler raw coal bunker anti-blocking device, such as Figure 1-5As shown, it includes a boiler raw coal bunker body 1, and the outer wall of the boiler raw coal bunker body 1 adopts a hyperbolic design to reduce the resistance of raw coal to the flow of the boiler raw coal bunker body 1, and reduce the frequency of coal blockage and coal overflow in the boiler raw coal bunker body 1. An upper support frame 2 and a lower support frame 3 are fixedly connected to the inner wall of one side of the boiler raw coal bunker body 1 by bolts. The upper support frame 2 is located above the lower support frame 3, and a three-phase asynchronous motor 4 is fixedly connected to the center position of the top of the upper support frame 2 by bolts. The three-phase asynchronous motor 4 is fixedly connected to a rotating shaft 5 through the output end on one side thereof, and the bottom end of the rotating shaft 5 rotates between the top of the lower support frame 3. The outer wall of the rotating shaft 5 is fixedly connected with an upper scraper 6, a middle scraper 7 and a lower scraper 8 by screws. The middle scraper 7 is located between the upper scraper 6 and the lower scraper 8. There are two upper scrapers 6, middle scrapers 7 and lower scrapers 8 in total, and the two upper scrapers 6, the two middle scrapers 7 and the two lower scrapers 8 are symmetrically arranged on the outer wall of the rotating shaft 5. The interior of the upper scraper 6 and the middle scraper 7 are fixedly connected with a first electric push rod 9 by bolts. The first electric push rod 9 is fixedly connected to a moving block 10 through the output end on one side thereof. The top of the moving block 10 is fixedly connected to a straight plate 11 by screws. The straight plate A V-shaped plate 12 is welded to the top of 11, a through groove 13 is provided on the top of the upper scraper 6 and the middle scraper 7 near the outer side of the V-shaped plate 12, a movable groove 14 is provided at the bottom of the inner portion of the through groove 13 near the outer side of the moving block 10, an inner cavity 15 is provided on the inner portion of the upper scraper 6 and the middle scraper 7 near one side of the moving block 10, the through groove 13 and the inner cavity 15 are both connected to the movable groove 14, and the straight plate 11 always covers the movable groove 14 during the movement to prevent the raw coal from falling into the movable groove 14 and clogging the inner cavity 15, and a slope 16 is provided on the inner wall of one side of the through groove 13. A valve seat 17 is fixedly connected to the outer wall of one side of the boiler raw coal bunker body 1 near the upper position of the lower scraper 8 by bolts, and a second electric push rod 18 is fixedly connected to the outer wall of the valve seat 17 away from the boiler raw coal bunker body 1 by bolts. The second electric push rod 18 is fixedly connected to the plug-in door 19 through the output end of one side thereof. A semicircular groove 20 is provided on the outer wall of the plug-in door 19 near the outer side of the rotating shaft 5. The rotating shaft 5 passes through the semicircular groove 20, and the outer wall of the rotating shaft 5 fits into the inner wall of the semicircular groove 20. An air hammer vibrator 21 is provided on the inner wall of one side of the boiler raw coal bunker body 1.

[0024] It should be noted that, due to the continuous change of coal type in the boiler coal bunker of the thermal power plant, the addition of economic coal, sludge and high-moisture raw coal in the raw coal causes frequent coal blocking and coal piling in the raw coal bunker during use. The coal blocking in the raw coal bunker causes the coal cutting of the mill group, which seriously affects the stable operation of the unit. In the embodiment, the three-blade rotary is used to realize the internal coal blocking of the boiler raw coal bunker body 1, the coal flow is overall dredged, the lower scraper 8 is extended to the lower part of the plug door 19, the coal sticking to the lower part of the plug door 19 is avoided, the coal blocking of the raw coal bunker is caused, the V-shaped plate 12 moves along the straight line reciprocatingly, the raw coal in the boiler raw coal bunker body 1 is swept, the area of the coal blocking area is increased, and the compact raw coal is loosened in a large range, so that the raw coal falls conveniently. Manual coal blocking and coal cleaning are safe and risky work, and there is a great safety hazard.

[0025] Specifically, in the embodiment, the scheme mainly includes the upper scraper 6, the middle scraper 7, the lower scraper 8, the straight plate 11 and the V-shaped plate 12. When the raw coal in the boiler raw coal bunker body 1 is discharged, the second electric push rod 18 is controlled to drive the plug door 19 to move through the output end on one side of the second electric push rod 18, the plug door 19 is accommodated into the valve seat 17, and the raw coal in the boiler raw coal bunker body 1 moves downward under the action of gravity and falls out. In the coal falling process, the three-phase asynchronous motor 4 is controlled to drive the rotating shaft 5 to rotate through the output end on one side of the three-phase asynchronous motor 4. The upper scraper 6, the middle scraper 7 and the lower scraper 8 on the rotating shaft 5 rotate and move axially, and the upper scraper 6, the middle scraper 7 and the lower scraper 8 rotate and move axially. The raw coal in the boiler raw coal bunker body 1 is rotated and dredged, and the coal flow is overall dredged. In the rotating process of the upper scraper 6 and the middle scraper 7, the first electric push rod 9 is controlled to drive the moving block 10 to move through the output end on one side of the first electric push rod 9. The straight plate 11 on the top of the moving block 10 moves synchronously, the V-shaped plate 12 on the top of the straight plate 11 moves along the straight line reciprocatingly, the V-shaped plate 12 disturbs the raw coal in the boiler raw coal bunker body 1 in the moving process, the compact raw coal is loosened, and the raw coal falls conveniently. The air hammer vibrator 21 vibrates the raw coal in the boiler raw coal bunker body 1, the coal blocking and coal piling area is vibrated, and the coal falling is facilitated.

[0026] In the further preferred embodiment of the utility model, as shown in Figure 1 and Figure 4 , the top of the lower scraper 8 is attached to the bottom of the plug door 19.

[0027] In the embodiment, the lower scraper 8 extends to the lower part of the plug door 19 to avoid the coal sticking to the lower part of the plug door 19 and causing the coal blocking of the raw coal bunker.

[0028] In the further preferred embodiment of the utility model, as shown in Figure 1-3 , the straight plate 11 and the V-shaped plate 12 are combined to form a triangular frame structure, and the straight plate 11 matches the through groove 13.

[0029] In this embodiment, the triangular frame structure can ensure the structural strength of the combination of the straight plate 11 and the V-shaped plate 12, thereby preventing the straight plate 11 and the V-shaped plate 12 from being squeezed and damaged. By moving the straight plate 11 in the through groove 13, the through groove 13 can limit the straight plate 11, and the straight plate 11 can also push the raw coal in the through groove 13 to avoid blockage of the through groove 13.

[0030] It should be noted that for the aforementioned embodiments, for simplicity of description, they are all expressed as a series of action combinations. However, those skilled in the art should be aware that the present invention is not limited by the order of the actions described, because according to the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0031] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative, such as the division of the above-mentioned units. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the coupling or communication connection between each other shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0032] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope to be protected by the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making any creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also fall within the scope to be protected by the present invention.

Claims

1. A boiler raw coal bunker anti-blocking device, characterized in that: include: Boiler raw coal bunker (1); An upper support frame (2) and a lower support frame (3) fixed to the inner side wall of the boiler raw coal bin (1) by bolts, wherein the upper support frame (2) is located above the lower support frame (3); A three-phase asynchronous motor (4) fixed to the top center of the upper support frame (2) by bolts; A rotating shaft (5) fixed to the output end of the three-phase asynchronous motor (4); An upper scraper (6), a middle scraper (7) and a lower scraper (8) fixed to the outer wall of the rotating shaft (5) by screws, wherein the middle scraper (7) is located between the upper scraper (6) and the lower scraper (8); a first electric push rod (9) fixed to the interior of the upper scraper (6) and the middle scraper (7) by bolts; a moving block (10) fixed to the output end of the first electric push rod (9); A straight plate (11) fixed to the top of the moving block (10) by screws; a V-shaped plate (12) welded to the top of the straight plate (11); Through grooves (13) are provided on the top of the upper scraper (6) and the middle scraper (7) at positions close to the outer sides of the straight plate (11); A movable groove (14) is provided at the bottom of the through groove (13) and close to the outer side of the movable block (10); The inner cavities (15) are both provided inside the upper scraper (6) and the middle scraper (7) at a position close to one side of the moving block (10); An inclined surface (16) provided on the inner side wall of the through groove (13); A valve seat (17) is fixed to the outer wall of the boiler raw coal bin (1) at an upper position near the lower scraper (8) by means of bolts; a second electric push rod (18) fixed to the outer side wall of the valve seat (17) by bolts; A plug-in door (19) fixed to the output end of the second electric push rod (18); A semicircular groove (20) is provided on the outer wall of one side of the plug-in door (19) near the outer side of the rotating shaft (5); An air hammer vibrator (21) is provided on the inner side wall of the boiler raw coal bin (1).

2. A boiler raw coal bunker anti-blocking device according to claim 1, characterized in that: The outer side wall of the boiler raw coal bin (1) adopts a hyperbolic design.

3. The boiler raw coal bunker anti-blocking device according to claim 1, characterized in that: The bottom end of the rotating shaft (5) is rotatably connected to the top of the lower support frame (3).

4. The boiler raw coal bunker anti-blocking device according to claim 1, characterized in that: The top of the lower scraper (8) is in contact with the bottom of the plug-in door (19).

5. The boiler raw coal bunker anti-blocking device according to claim 1, characterized in that: The straight plate (11) and the V-shaped plate (12) are combined to form a triangular frame structure, and the straight plate (11) and the through groove (13) are matched and fitted.

6. The boiler raw coal bunker anti-blocking device according to claim 1, characterized in that: The through groove (13) and the inner cavity (15) are both communicated with the movable groove (14).

7. The boiler raw coal bunker anti-blocking device according to claim 1, characterized in that: There are two upper scrapers (6), two middle scrapers (7) and two lower scrapers (8) in total, and the two upper scrapers (6), two middle scrapers (7) and two lower scrapers (8) are symmetrically arranged on the outer side wall of the rotating shaft (5).

8. The boiler raw coal bunker anti-blocking device according to claim 1, characterized in that: The rotating shaft (5) passes through the semicircular groove (20), and the outer side wall of the rotating shaft (5) fits the inner side wall of the semicircular groove (20).

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