Split air hood for circulating fluidized bed boiler

Abstract

The utility model belongs to the technical field of boiler hoods, specifically a split hood for a circulating fluidized bed boiler, comprising a hood rod, a hood head being threadedly connected to the top of the hood rod, air outlets being equidistantly provided inside the hood head, a sealing ring being arranged below the outside of the hood rod, a sealing ring being fixedly connected to the top of the sealing ring, a partition being fixedly connected to the bottom of the hood rod, and a sliding rod being equidistantly slidably connected inside the partition; the utility model provides a split hood for a circulating fluidized bed boiler, which solves the problem in the prior art that, when the hood is connected to a bellows, a sealing ring is installed on the hood rod of the boiler hood to improve the sealing between the hood and the air box. However, the sealing ring will be greatly worn due to frequent disassembly of the hood during use, affecting the sealing effect of the hood, and the existing sealing ring is annular in structure, which will result in the sealing ring being unable to seal the surface of the bellows, further affecting the sealing effect of the hood.

Description

Technical Field

[0001] The utility model belongs to the field of boiler hoods, in particular to a split hood for a circulating fluidized bed boiler. Background Art

[0002] The boiler hood is installed on the wind plate at the bottom of the fluidized bed boiler combustion chamber and is connected to the bellows. Its purpose is to deliver the boiler air to the furnace bed material layer to meet the air required for boiler combustion. By controlling the amount of air supply, the furnace bed material layer is always kept in a fluidized boiling state, allowing the coal to burn thoroughly.

[0003] When the hood in the prior art is connected to the bellows, a sealing ring is installed on the hood rod of the boiler to improve the sealing between the hood and the air box. However, the frequent removal of the hood during use will cause significant wear to the sealing ring, affecting the sealing effect of the hood. In addition, the existing sealing ring is annular in structure, which will cause the sealing ring to be unable to seal the surface of the bellows, further affecting the sealing effect of the hood. Utility Model Content

[0004] In view of the above problems existing in the prior art, the main purpose of the utility model is to provide a split hood for a circulating fluidized bed boiler.

[0005] The technical solution of the utility model is as follows: a split wind hood for a circulating fluidized bed boiler, comprising a cap rod, a cap head being threadedly connected to the top of the cap rod, air outlets being equidistantly provided inside the cap head, a sealing ring being arranged at a lower portion of the outside of the cap rod, a sealing ring being fixedly connected to the top of the sealing ring, a partition being fixedly connected to the bottom of the cap rod, a sliding rod being equidistantly slidably connected to the inside of the partition, a push plate being fixedly connected to one end of the outside of the sliding rod, a pressure ring being slidably connected to the outside of the cap rod and located above the sealing ring, cams being equidistantly provided on the outside of the cap rod and located above the pressure ring, and a transmission assembly being arranged inside the cap rod.

[0006] As a preferred embodiment, the transmission assembly includes a rotating column and a transmission unit, the rotating column is rotatably connected to the inside of the cap rod, the bottom of the rotating column is fixedly connected to a rotating block, the outside of the rotating block is fixedly connected to an arc block equidistantly corresponding to the sliding rod, the outside of the arc block is fixedly connected to a disc on one side close to the partition, a spring is provided on the outside of the arc block and between the disc and the inner wall of the cap rod, and the cam is rotated by the transmission unit.

[0007] As a preferred embodiment, the transmission unit includes a first bevel gear, which is fixedly connected to the outside of the rotating column and located above the rotating block. The inner wall of the cap rod is equidistantly connected to a rotating rod located above the push plate. One end of the rotating rod inside the cap rod is fixedly connected to a second bevel gear, the first bevel gear is respectively meshed with multiple groups of second bevel gears, and one end of the rotating rod extending to the outside of the cap rod is fixedly connected to a cam.

[0008] As a preferred implementation, the exterior of the push plate is an arc-shaped structure, and a buffer pad is fixedly connected to one side of the exterior of the push plate close to the sealing ring, and the buffer pad is made of rubber material.

[0009] As a preferred embodiment, first through holes are equidistantly formed inside the rotating block, and second through holes corresponding to the first through holes are equidistantly formed inside the first bevel gear.

[0010] As a preferred embodiment, the top of the rotating column extends to the top of the cap rod and is fixedly connected to a rotating wheel, and the outside of the rotating wheel is provided with a knurling pattern.

[0011] The beneficial effects of the utility model are as follows:

[0012] The device can press the sealing ring and the sealing ring by pushing the push plate and rotating the cam, so that they fit tightly with the bellows and avoid the sealing ring from loosening and causing air leakage after being used for a period of time, effectively improving the sealing between the hood and the bellows and the service life of the sealing ring and avoiding air leakage. In addition, it is convenient to disassemble and replace the sealing ring and the sealing ring after they cannot be used, which further improves the ease of use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model will be further described below in conjunction with the accompanying drawings.

[0014] Figure 1 It is a three-dimensional diagram of the utility model;

[0015] Figure 2 It is a cross-sectional view of the utility model;

[0016] Figure 3 It is a top sectional view of the utility model;

[0017] Figure 4 For the utility model Figure 2 Enlarged view of point A in the middle;

[0018] Figure 5 For the utility model Figure 3 Enlarged view of point B in the middle.

[0019] In the figure: 1. cap rod; 2. cap head; 3. air outlet; 4. sealing ring; 5. sealing ring; 6. sliding rod; 7. push plate; 8. pressure ring; 9. cam; 10. rotating column; 11. rotating block; 12. arc block; 13. disk; 14. spring; 15. first bevel gear; 16. rotating rod; 17. second bevel gear; 18. partition; 19. first through hole; 20. second through hole; 21. rotating wheel. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] See also Figure 1-5 A split hood for a circulating fluidized bed boiler comprises a cap rod 1, a cap head 2 is threadedly connected to the top of the cap rod 1, air outlets 3 are equidistantly provided inside the cap head 2, a sealing ring 4 is arranged at the lower part of the outside of the cap rod 1, a sealing ring 5 is fixedly connected to the top of the sealing ring 4, a partition 18 is fixedly connected to the bottom of the cap rod 1, a sliding rod 6 is equidistantly slidably connected to the inside of the partition 18, a push plate 7 is fixedly connected to one end of the outside of the sliding rod 6, a pressure ring 8 is slidably connected to the outside of the cap rod 1 and located above the sealing ring 5, a cam 9 is equidistantly provided on the outside of the cap rod 1 and located above the pressure ring 8, and a transmission assembly is arranged inside the cap rod 1.

[0022] Specifically, the transmission assembly includes a rotating column 10 and a transmission unit. The rotating column 10 is rotatably connected to the inside of the cap rod 1. The bottom of the rotating column 10 is fixedly connected to a rotating block 11. The outside of the rotating block 11 is equidistantly fixedly connected to an arc block 12 corresponding to the sliding rod 6. The outside of the arc block 12 is fixedly connected to a disk 13 on one side close to the partition 18. A spring 14 is provided on the outside of the arc block 12 and between the disk 13 and the inner wall of the cap rod 1. The cam 9 is rotated through the transmission unit. The transmission unit includes a first bevel gear 15. The first bevel gear 15 is fixedly connected to the outside of the rotating column 10 and is located above the rotating block 11. The inner wall of the cap rod 1 is equidistantly rotatably connected to a rotating rod 16 above the push plate 7. One end of the rotating rod 16 inside the cap rod 1 is fixedly connected to a second bevel gear 17. The first bevel gear 15 is respectively meshed with multiple groups of second bevel gears 17. The end of the rotating rod 16 extending to the outside of the cap rod 1 is fixedly connected to the cam 9.

[0023] By means of the above technical scheme, after the hood is installed, the rotating wheel 21 is rotated to drive the rotating column 10 to rotate, so that the rotating column 10 drives the rotating block 11 at the bottom to rotate, and the rotating block 11 drives the external arc block 12 to move, and the arc surface of the arc block 12 can push the slide bar 6 to slide outward under the limit of the partition 18, and at the same time push the push plate 7 to squeeze the sealing ring 4 and drive the disc 13 to compress the spring 14, and the sealing ring 4 can be tightly fitted with the inner wall of the bellows through the squeezing of the push plate 7, thereby improving the sealing performance of the device, and when the rotating column 10 rotates, the first bevel gear 15 can be driven to rotate, so that the first bevel gear 15 drives the multiple second bevel gears 17 to rotate through the meshing relationship, and the second bevel gear 17 drives the external cam 9 to rotate through the rotating rod 16, and one end of the cam 9 can push the compression spring 14 when it rotates to the bottom. The ring 8 presses the sealing ring 5 downward, so that the sealing ring 5 fits tightly against the top surface of the bellows, further improving the sealing performance of the device; when the sealing ring 4 and the sealing ring 5 need to be disassembled and replaced, the rotating wheel 21 is rotated in the opposite direction to drive the push plate 7 and the cam 9 to move away from the sealing ring 4 and the sealing ring 5 respectively, so that a gap is created between the sealing ring 4 and the sealing ring 5 and the bellows, and they can be disassembled; when the cap head 2 is severely worn after long-term use, the cap head 2 can be disassembled and replaced by unscrewing it through the thread; the device can compress the sealing ring 4 and the sealing ring 5 by pushing the push plate 7 and rotating the cam 9, so that they fit tightly against the bellows, effectively improving the sealing between the hood and the bellows, avoiding air leakage, and it is convenient to disassemble and replace the sealing ring 4 and the sealing ring 5 after they cannot be used, further improving the ease of use of the device.

[0024] Specifically, the outside of the push plate 7 is an arc-shaped structure, and a buffer pad is fixedly connected to one side of the outside of the push plate 7 close to the sealing ring 4, and the buffer pad is made of rubber material.

[0025] Through the above technical solution, the buffer pad can be provided to prevent the sharp corners of the push plate 7 from causing premature damage to the sealing ring 4.

[0026] Specifically, first through holes 19 are equidistantly provided inside the rotating block 11, second through holes 20 corresponding to the first through holes 19 are equidistantly provided inside the first bevel gear 15, the top of the rotating column 10 extends to the top of the cap rod 1 and is fixedly connected to a rotating wheel 21, and the outside of the rotating wheel 21 is provided with a knurled pattern.

[0027] Through the above technical solution, the air output of the hood can be effectively controlled by providing the first through hole 19 and the second through hole 20 in cooperation with the air outlet 3 .

[0028] When in use, after the hood is installed, the rotating wheel 21 is rotated to drive the rotating column 10 to rotate, so that the rotating column 10 drives the rotating block 11 at the bottom to rotate, and the rotating block 11 drives the external arc block 12 to move, and the arc surface of the arc block 12 can push the slide bar 6 to slide outward under the limit of the partition 18, and at the same time push the push plate 7 to squeeze the sealing ring 4 and drive the disc 13 to compress the spring 14. The squeezing of the push plate 7 can make the sealing ring 4 fit tightly with the inner wall of the bellows, thereby improving the sealing performance of the device. When the rotating column 10 rotates, the first bevel gear 15 can be driven to rotate, so that the first bevel gear 15 drives multiple second bevel gears 17 to rotate through the meshing relationship, and the second bevel gear 17 drives the external cam 9 to rotate through the rotating rod 16. When one end of the cam 9 rotates to the bottom, it can push the pressure ring 8 to press the sealing ring 5 downward, so that the sealing ring 5 is tightly fitted with the top surface of the bellows, further improving the sealing performance of the device. When it is necessary to disassemble and replace the sealing ring 4 and the sealing ring 5, the rotating wheel 21 is rotated in the opposite direction to drive the push plate 7 and the cam 9 to move away from the sealing ring 4 and the sealing ring 5 respectively, so that a gap is generated between the sealing ring 4 and the sealing ring 5 and the bellows, and they can be disassembled. When the cap head 2 is severely worn after long-term use, the cap head 2 can be unscrewed through the thread for disassembly and replacement. The buffer pad can prevent the sharp corners of the push plate 7 from causing premature damage to the sealing ring 4. The first through hole 19 and the second through hole 20 are provided to cooperate with the air outlet 3 to effectively control the air outlet of the hood.

[0029] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0031] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A circulating fluidized bed boiler split hood, comprising a hood rod (1), characterized in that: The top of the cap rod (1) is threadedly connected to a cap head (2), and air outlets (3) are equidistantly provided inside the cap head (2). A sealing ring (4) is provided at the lower part of the outside of the cap rod (1), and a sealing ring (5) is fixedly connected to the top of the sealing ring (4). The bottom of the cap rod (1) is fixedly connected to a partition plate (18), and a sliding rod (6) is equidistantly slidably connected inside the partition plate (18), and a push plate (7) is fixedly connected to one end of the outside of the sliding rod (6). A pressure ring (8) is slidably connected outside the cap rod (1) and located above the sealing ring (5). Cams (9) are equidistantly provided outside the cap rod (1) and located above the pressure ring (8), and a transmission assembly is provided inside the cap rod (1).

2. The circulating fluidized bed boiler split hood according to claim 1, characterized in that: The transmission assembly comprises a rotating column (10) and a transmission unit. The rotating column (10) is rotatably connected to the inside of the cap rod (1). A rotating block (11) is fixedly connected to the bottom of the rotating column (10). An arc block (12) is fixedly connected to the outside of the rotating block (11) at an equidistant distance corresponding to the sliding rod (6). A disc (13) is fixedly connected to the outside of the arc block (12) on a side close to the partition (18). A spring (14) is provided outside the arc block (12) and between the disc (13) and the inner wall of the cap rod (1). The cam (9) is rotated by the transmission unit.

3. The split air hood of a circulating fluidized bed boiler according to claim 2, characterized in that: The transmission unit comprises a first bevel gear (15), the first bevel gear (15) being fixedly connected to the outside of the rotating column (10) and being located above the rotating block (11); a rotating rod (16) being equidistantly rotatably connected to the inner wall of the cap rod (1) and being located above the push plate (7); one end of the rotating rod (16) located inside the cap rod (1) being fixedly connected to a second bevel gear (17); the first bevel gear (15) being meshedly connected to a plurality of groups of second bevel gears (17); and one end of the rotating rod (16) extending to the outside of the cap rod (1) being fixedly connected to a cam (9).

4. The circulating fluidized bed boiler split hood according to claim 3, characterized in that: The outside of the push plate (7) is an arc-shaped structure, and a buffer pad is fixedly connected to the outside of the push plate (7) on one side close to the sealing ring (4), and the buffer pad is made of rubber material.

5. The split air hood of a circulating fluidized bed boiler according to claim 4, characterized in that: The rotating block (11) has first through holes (19) equidistantly formed inside, and the first bevel gear (15) has second through holes (20) equidistantly formed inside and corresponding to the first through holes (19).

6. The split air hood of a circulating fluidized bed boiler according to claim 5, characterized in that: The top of the rotating column (10) extends to the top of the cap rod (1) and is fixedly connected to a rotating wheel (21), and the outside of the rotating wheel (21) is provided with a knurled pattern.

Images