Device for quantitative feeding at lower part of ash bin of bag type dust collector

Abstract

The utility model relates to a quantitative feeding device for the lower part of an ash bin of a bag type dust collector, which comprises a shell, a long shaft rotationally arranged in the shell, and a driving motor which is arranged outside the shell and is used for driving the long shaft to rotate, the upper end and the lower end of the shell are respectively provided with a feed port and a discharge port, and the center of the shell is provided with a bearing chamber for separating the inner cavity of the shell left and right. A supporting structure for supporting the long shaft is arranged in the bearing chamber, a rotating cylinder is fixedly connected to the portion, located outside the bearing chamber, of the long shaft in the shell, a plurality of scraping plates are fixedly connected to the outer ring of the rotating cylinder in the circumferential direction, the scraping plates and the inner wall of the shell are arranged in a sealed and attached mode, and a blowing pipe is fixedly connected to the top of the feeding port in the circumferential direction of the inner wall in a surrounding mode. A purging opening for blowing air to the inner wall of the feeding opening is formed in the purging pipe, and the purging pipe is communicated with an air source through an air inlet pipe. According to the quantitative feeding device suitable for the long-strip-shaped ash bin dust remover, ash blowing is conducted on the inner wall of the feeding port through the blowing pipe, dust accumulation and caking are effectively avoided, the using effect of the device is improved, and the service life of the device is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal of bag dust collectors, in particular to a device for quantitative feeding at the lower part of a ash bin of a bag dust collector. Background Art

[0002] In the dust removal systems used in the chemical, food, cement, metallurgical and other fields, bag dust collectors are usually used to purify and filter dust-containing gases. The filtered dust is transported for treatment by connecting an ash conveyor to the bottom of the ash bin of the bag dust collector. However, this direct connection between the dust collector and the ash conveyor is prone to ash spraying and dust raising when the system is shut down for maintenance due to the poor sealing of the ash conveyor. When the amount of ash is large, the ash conveying system may become blocked, seriously affecting the system maintenance efficiency.

[0003] The prior art usually installs a star-shaped discharger between the dust collector and the ash conveyor, and solves the problem of dust spraying during shutdown by uniformly feeding with high sealing performance of the discharger. However, the star-shaped discharger is only suitable for bag dust collectors with a conical funnel-shaped ash bin, and cannot be installed on dust collectors with a long strip-shaped ash bin. Therefore, a feeding device suitable for dust collectors with a long strip-shaped ash bin is needed to make up for the shortcomings of the prior art. In addition, the feed port of the existing discharger is usually also funnel-shaped, and some of the fallen dust is very easy to accumulate on the inclined wall of the feed port. After a long period of accumulation, agglomeration occurs on the feed port, which further hinders the sliding of dust, increases the burden on the feed port, and shortens the service life. Utility Model Content

[0004] Aiming at the deficiencies of the prior art, the utility model provides a quantitative feeding device for a dust collector of a long strip ash bin.

[0005] The utility model is realized through the following technical scheme: a device for quantitative feeding at the lower part of the ash bin of a bag dust collector, comprising a shell, a long shaft rotatably arranged in the shell, and a driving motor outside the shell for driving the long shaft to rotate, wherein the upper and lower ends of the shell are respectively provided with a feed port and a discharge port, a bearing chamber is provided at the center of the shell for dividing the inner cavity of the shell into left and right parts, the long shaft extends through the bearing chamber in the left and right directions and is rotatably connected to the left and right side walls of the shell, a supporting structure for supporting the long shaft is provided in the bearing chamber, a rotating drum is fixedly connected to the long shaft outside the bearing chamber in the shell, a plurality of scrapers are fixedly connected to the outer ring of the rotating drum in a circumferentially distributed manner, the scrapers extend along the length direction of the rotating drum, and the outer wall and the inner wall of the shell are sealed and fitted.

[0006] This solution arranges a long axis in the shell so that the device can be suitable for dust collectors with long ash silos. By arranging a supporting structure on the long axis, deformation and bending of the long axis due to excessively large diameter differences can be avoided, thereby improving the stability of operation. The supporting structure is arranged in the bearing room to protect the supporting structure, avoid blocking the support by falling dust, and further improve the operating reliability of the device.

[0007] As an optimization, the bearing chamber is sealed and fixedly connected to the inner wall of the housing, a cover with a conical cross section is fixedly connected to the top of the bearing chamber, and the cover is sealed and fixedly connected to the inner wall of the feed port. In this optimization solution, the bearing chamber and the housing are sealed and fixedly connected, which improves the sealing of the entire device and avoids the generation of dust. The cover above the bearing chamber facilitates dust to slide off and avoids dust accumulation on the bearing chamber.

[0008] As an optimization, the support structure includes a support bearing and a fixed seat, the inner ring of the support bearing is fixedly connected to the long shaft, and the fixed seat is fixedly connected to the bearing chamber and to the outer ring of the support bearing. In this optimization scheme, the long shaft is rotatably connected to the fixed seat through the support bearing, and the long shaft is supported by the fixed seat to ensure the stability of operation.

[0009] As an optimization, a refueling pipe for refueling the support bearing is provided in the bearing chamber, and a refueling hole connected to the refueling pipe is provided on the outer wall of the housing. This optimization solution facilitates refueling the support bearing and reduces friction.

[0010] As an optimization, a purge pipe is fixedly connected to the top of the feed port along the circumference of the inner wall, and a number of purge ports facing the inner wall of the feed port are evenly spaced on the purge pipe. An air inlet pipe is fixedly connected to the outer wall of the feed port and is connected to the purge pipe. The end of the air inlet pipe away from the purge pipe is connected to the air source. In this optimization solution, the air source provides air to the purge pipe, and the dust dropped on the feed port is purged through the air outlet of the purge port to prevent dust from accumulating on the side wall of the feed port.

[0011] As an optimization, a first inspection hole communicating with the bearing chamber is opened on the outer wall of the housing, and a first inspection door sealing the first inspection hole is hingedly connected to the outer wall of the housing. This optimization solution facilitates the inspection of the bearing chamber.

[0012] As an optimization, the left and right ends of the outer wall of the shell are provided with second inspection holes connected to the inner cavity of the shell, and the outer wall of the shell is hinged with a second inspection door that seals the second inspection hole. This optimization facilitates the inspection of the long axis connection on the left and right sides of the shell.

[0013] As an optimization, the inner cavity length of the shell is 3 meters. This optimized shell length can be used in conjunction with the most common long strip ash bin.

[0014] The beneficial effects of the utility model are as follows: by lengthening the shell and arranging a matching long shaft in the shell, the device can be installed at the bottom of a long ash bin, filling the blank area of ​​the existing unloading device; by arranging a bearing room and a supporting structure in the shell, the stability and reliability of the long shafts of different diameters during operation are improved; by arranging a purge pipe at the feed port, compressed air is provided through the air source to purge the side wall of the feed port, thereby avoiding dust accumulation and improving the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 For the utility model is trying;

[0016] Figure 2 This is a rear view of the utility model;

[0017] Figure 3 It is a top view of the utility model;

[0018] Figure 4 It is a front cross-sectional view of the utility model;

[0019] Figure 5 It is a side sectional view of the utility model;

[0020] Figure 6 for Figure 4 A magnified view of part A;

[0021] Figure 7 for Figure 4 A magnified view of part B

[0022] As shown in the figure:

[0023] 1. Shell, 2. Feed inlet, 3. Discharge outlet, 4. Long shaft, 5. Rotating drum, 6. Scraper, 7. Bearing chamber, 8. Support structure, 9. Purge pipe, 10. Cover, 11. First bearing, 12. Air inlet pipe, 13. Purge port, 14. First inspection door, 15. Second inspection door, 16. Reducer, 17. Support bearing seat, 18. Fueling hole, 19. Fueling pipe, 20. Driving motor, 81. Left base, 82. Right base, 83. Support bearing, 84. Fixing ring, 85. Fixing rod. DETAILED DESCRIPTION

[0024] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0025] like Figures 1 to 5 As shown, a device for quantitative feeding at the lower part of the ash bin of a bag filter includes a shell 1, a long shaft 4 rotatably arranged in the shell 1, and a driving motor 20 outside the shell 1 for driving the long shaft 4 to rotate. The upper and lower ends of the shell 1 are respectively provided with a feed port 2 and a discharge port 3.

[0026] like Figure 1 , 5As shown, the shell 1 of this embodiment is a cylindrical structure, and the left and right ends of the shell 1 are fixedly connected with end covers to form the left and right side walls of the shell. The feed port 2 and the discharge port 3 are both rectangular funnel-shaped structures and are connected to the inner cavity of the shell 1. The upper end of the feed port 2 and the lower end of the discharge port 3 are fixedly connected with flanges. The calibers of the feed port and the discharge port flanges of this device can be determined according to the actual size of the on-site ash bin outlet flange and the ash conveyor inlet flange. According to the size of the most commonly used long strip ash bin, the inner cavity length of the shell 1 of this embodiment is set to 3 meters. It is better that the side wall slope of the feed port 2 is greater than 45°, which can better make the dust slide off.

[0027] like Figure 4 As shown, a bearing chamber 7 is provided at the center of the housing 1 to separate the inner cavity of the housing into left and right. The bearing chamber 7 is sealed and fixedly connected to the inner wall of the housing 1, and a cover 10 with a conical cross section is fixedly connected to the top of the bearing chamber 7. The cover 10 is sealed and fixedly connected to the inner wall of the feed port 2 to improve the sealing of the device as a whole and avoid the generation of dust. The conical cover facilitates the dust to slide off and avoids the accumulation of dust on the bearing chamber. The bearing chamber 7 of this embodiment is composed of two partition plates adapted to the inner cavity of the housing and a top plate that is fixed by welding to the inner wall of the housing. The bearing chamber 7 is fixedly connected to the center of the housing 1 to separate the inner cavity of the housing into a left chamber and a right chamber.

[0028] like Figure 4 As shown, the long shaft 4 extends in the left-right direction through the bearing chamber 7 and is rotatably connected to the left and right side walls of the housing 1. In this embodiment, a sealing sleeve is used to seal the long shaft 4 and the bearing chamber 7. The end covers at the left and right ends of the housing 1 are fixed with an extended support bearing seat 17. The long shaft 4 is rotatably connected at the center of the left and right ends of the housing 1 through the first bearing 11, and the shaft seal is screwed through the sealing gland. The long shaft 4 of this embodiment is made of high-strength steel, and the sealing sleeve needs to be annealed and heat treated to ensure its strength.

[0029] In this embodiment, the driving motor 20 is fixedly connected to the supporting bearing seat 17 at one end of the housing 1, and the output end of the driving motor 20 is connected to a reducer, and the output end of the reducer is fixedly connected to the end of the long shaft.

[0030] A rotating drum 5 is fixedly connected to the long shaft 4 outside the bearing chamber 7 in the housing 1. A plurality of scrapers 6 are fixedly connected to the outer ring of the rotating drum 5 in a circumferential distribution. The scrapers 6 extend along the length direction of the rotating drum 5 and the outer wall is sealed and fitted with the inner wall of the housing 1. Figure 4 , 5 As shown, in this embodiment, a rotating drum is fixedly connected to the long axis of the left chamber and the right chamber in the shell 1, and six scrapers 6 are fixedly connected to the outer wall of the rotating drum 5 in this embodiment.

[0031] A support structure 8 for supporting the long shaft 4 is provided in the bearing chamber 7. The support structure 8 includes a support bearing 83 and a fixing seat. The inner ring of the support bearing 83 is fixedly connected to the long shaft 4. The fixing seat is fixedly connected to the bearing chamber 7 and to the outer ring of the support bearing 83. Figure 6 As shown, the support bearing 83 of this embodiment is located at the center of the long axis 4, and the fixed seat includes a left base 81 and a right base 82. The left base 81 and the right base 82 are respectively fixedly connected to the left and right partition plates of the bearing chamber 7 with bolts, and the outer wall of the support bearing 83 is fixedly connected with a fixing ring 84, and the upper and lower ends of the side wall of the left base 81 and the front and rear ends of the side wall of the right base 82 are fixedly connected with a fixing rod 85, and the end of the fixing rod 85 is provided with an internal thread and is fixedly connected with the fixing ring 84 with bolts.

[0032] The bearing chamber 7 is provided with a refueling pipe 19 for refueling the support bearing 83, and the outer wall of the shell 1 is provided with a refueling hole 18 connected to the refueling pipe 19, so as to facilitate refueling the support bearing. The outer wall of the shell 1 is provided with a first inspection hole connected to the bearing chamber 7, and a first inspection door 14 is hinged on the outer wall of the shell 1 to seal the first inspection hole, so as to facilitate maintenance of the bearing chamber. The left and right ends of the outer wall of the shell 1 are provided with second inspection holes connected to the inner cavity of the shell 1, and a second inspection door 15 is hinged on the outer wall of the shell 1 to seal the second inspection hole, so as to facilitate maintenance of the long axis connection on the left and right sides of the shell. Figure 1 , 2 As shown, the refueling pipe 19 in this embodiment is installed and fixed on the support bearing 83, the refueling hole 18 is located on the rear side wall of the shell 1, and the first inspection door 14 and the second inspection door 15 are located on the front side wall of the shell 1. The first inspection door and the second inspection door can be used to inspect and oil the first bearing.

[0033] A purge pipe 9 is fixedly connected to the top of the feed port 2 along the circumference of the inner wall. A number of purge ports 13 facing the inner wall of the feed port are evenly spaced on the purge pipe 9, and the purge ports are connected to the purge pipe. An air inlet pipe 12 is fixedly connected to the outer wall of the feed port 2 and is connected to the purge pipe 9. The end of the air inlet pipe 12 away from the purge pipe is connected to an air source. The air source in this embodiment is an air compressor or a system compressed gas pipeline. Compressed air is provided by the air compressor or the system compressed gas pipeline, and dust dropped on the feed port is purged through the purge port to avoid dust accumulation on the side wall of the feed port.

[0034] like Figure 3 , 7 As shown, the purge pipes 9 of this embodiment are arranged in two groups on the left and right around the inner cavity of the feed port, and the two groups of purge pipes are connected to the inner wall of the feed port and the cover on the top of the bearing chamber for purge respectively, and a flange connected to the air compressor or the system compressed gas pipeline is fixed at the pipe mouth of the air inlet pipe.

[0035] Working principle: The feed port 2 of the device is fixedly connected to the outlet of the ash bin, and the discharge port 3 is fixedly connected to the inlet of the ash conveyor. The dust falling from the ash bin falls between the scrapers 6. By adjusting the speed of the driving motor 20, the dust between the scrapers is evenly and steadily quantitatively input into the ash conveyor. During operation, air is blown into the purge pipe 9 through the air compressor or the system compressed air pipeline, and the dust attached to the inner wall of the feed port 2 is blown into the shell through the purge port 13 to avoid agglomeration. When the system is shut down, it can be shut down directly, which effectively avoids the occurrence of dust spraying in the system. At the same time, the system does not need to slow down the back-blowing ash, and can be shut down directly. The scraper 6 sealed in the shell 1 can effectively close the lower air inlet, ensuring that the dust blown back is in a relatively static and flowing space, and falls to the upper part of the device by the gravity of the dust, which effectively avoids the occurrence of dust spraying in the system.

[0036] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A device for quantitative feeding at the lower part of a dust bin of a bag filter, comprising a housing (1), a long shaft (4) rotatably arranged in the housing, and a drive motor (20) outside the housing for driving the long shaft to rotate, wherein a feed inlet (2) and a discharge outlet (3) are respectively provided at the upper and lower ends of the housing (1), and characterized in that: A bearing chamber (7) is provided at the center of the shell (1) for dividing the inner cavity of the shell into left and right parts. The long axis (4) extends in the left-right direction through the bearing chamber (7) and is rotatably connected to the left and right side walls of the shell (1). A support structure (8) for supporting the long axis is provided in the bearing chamber (7). A rotating drum (5) is fixedly connected to the long axis (4) outside the bearing chamber in the shell (1). A plurality of scrapers (6) are fixedly connected to the outer ring of the rotating drum (5) in a circumferentially distributed manner. The scrapers extend in the length direction of the rotating drum and the outer wall and the inner wall of the shell are arranged to be sealed and fitted.

2. A device for quantitative feeding at the bottom of the ash bin of a bag filter according to claim 1, characterized in that: The bearing chamber (7) is sealed and fixedly connected to the inner wall of the housing (1); a cover (10) having a conical cross section is fixedly connected to the top of the bearing chamber (7); and the cover (10) is sealed and fixedly connected to the inner wall of the feed port (2).

3. The device for quantitative feeding at the lower part of the ash bin of a bag filter according to claim 1, characterized in that: The support structure (8) comprises a support bearing (83) and a fixed seat, the inner ring of the support bearing (83) is fixedly connected to the long shaft (4), and the fixed seat is fixedly connected to the bearing chamber (7) and to the outer ring of the support bearing (83).

4. A device for quantitative feeding at the lower part of the ash bin of a bag filter according to claim 3, characterized in that: A refueling pipe (19) for refueling the support bearing (83) is provided in the bearing chamber (7), and a refueling hole (18) communicating with the refueling pipe is provided on the outer wall of the housing (1).

5. The device for quantitative feeding at the bottom of the ash bin of a bag filter according to claim 1, characterized in that: A purge pipe (9) is fixedly connected to the top of the feed port (2) along the circumference of the inner wall, and a plurality of purge ports (13) facing the inner wall of the feed port are evenly spaced and arranged on the purge pipe. An air inlet pipe (12) is fixedly connected to the outer wall of the feed port and is connected to the purge pipe (9), and an end of the air inlet pipe away from the purge pipe is connected to an air source.

6. The device for quantitative feeding at the bottom of the ash bin of a bag filter according to claim 1, characterized in that: A first inspection hole communicating with the bearing chamber (7) is formed on the outer wall of the housing (1), and a first inspection door (14) sealing the first inspection hole is hingedly connected to the outer wall of the housing (1).

7. The device for quantitative feeding at the lower part of the ash bin of a bag filter according to claim 1, characterized in that: The left and right ends of the outer wall of the shell (1) are provided with second inspection holes communicating with the inner cavity of the shell, and a second inspection door (15) is hingedly connected to the outer wall of the shell to seal the second inspection hole.

8. The device for quantitative feeding at the bottom of the ash bin of a bag filter according to claim 1, characterized in that: The inner cavity of the shell (1) is 3 meters long.

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