Air cap for circulating fluidized bed boiler

Abstract

The utility model discloses an air cap for a circulating fluidized bed boiler, which relates to the technical field of circulating fluidized beds and comprises an air cap head and an air outlet, a tube core is inserted into the bottom of the air cap head, the air outlet is arranged on the outer side of the air cap head, fixing blocks are mounted on two sides of the tube core, inserting blocks are inserted into the middles of the fixing blocks, and the inserting blocks are inserted into the inserting blocks. A telescopic spring is installed in the inserting block through a groove, one end of the telescopic spring is connected with a telescopic block penetrating through the groove of the inserting block, and one end of the telescopic block is connected with a connecting rod. According to the air cap for the circulating fluidized bed boiler, when the air cap head is abraded and needs to be replaced, only the top block needs to be pushed towards the rotating block, so that the rotating block is extruded by the top block to rotate, and after the rotating block rotates to an angle and is aligned with the through groove of the fixed block, the air cap head can be pulled without being blocked by the rotating block; and the wind cap head drives the fixing block to be separated from the inserting block, so that the worn wind cap head can be conveniently replaced.

Description

Technical Field

[0001] This utility model relates to the field of circulating fluidized bed technology, specifically to a wind cap for a circulating fluidized bed boiler. Background Technology

[0002] A circulating fluidized bed (CFB) boiler is a highly efficient combustion device that uses a high-speed airflow to mix fuel and air and keep them in suspension, thereby achieving more uniform combustion. The air cap is a crucial component of a CFB boiler, mounted on the air distribution plate. Its main function is to distribute the primary air, ensuring uniform fluidization of the bed material, and thus guaranteeing the stability and efficiency of the combustion process.

[0003] Existing circulating fluidized bed air caps are usually connected by threads. Under the influence of high temperature, they will expand, resulting in a tight connection between the air cap head and the tube core. This makes it very cumbersome and inconvenient to disassemble and replace the air cap head. Utility Model Content

[0004] The purpose of this invention is to provide a wind cap for a circulating fluidized bed boiler, so as to solve the problem mentioned in the background art that the wind caps currently used in circulating fluidized beds are inconvenient to replace.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a wind cap for a circulating fluidized bed boiler, comprising: a wind cap head and an air outlet, wherein a tube core is inserted into the bottom of the wind cap head, and the air outlet is opened on the outer side of the wind cap head;

[0006] Fixing blocks are installed on both sides of the core tube. An insert block is inserted into the middle of the fixing blocks. A telescopic spring is installed inside the insert block through a groove. One end of the telescopic spring is connected to a telescopic block that passes through the groove of the insert block. One end of the telescopic block is connected to a connecting rod. The end of the connecting rod away from the telescopic block is connected to a rotating block through a rotating shaft. One end of the rotating block is connected to the groove of the insert block through a rotating shaft.

[0007] Preferably, a top rod is provided on one side of the rotating block, and a sliding block is connected between one side of the top rod and the groove of the insert block.

[0008] Preferably, the sliding block is slidably connected in a groove on one side of the insert block, and the insert block is installed in a groove in the hood head.

[0009] Preferably, the rotating block forms a rotating structure with the insert block via a rotating shaft.

[0010] Preferably, the inside of the hood head is provided with a circular groove, and a sealing block is installed inside the circular groove.

[0011] Preferably, a pressure ring is provided at one end of the sealing block, and a fixing ring is provided at the end of the sealing block away from the pressure ring.

[0012] Preferably, the retaining ring is installed on the inner wall of the hood head.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: When the air cap of this circulating fluidized bed boiler is worn and needs to be replaced, it is only necessary to push the top block towards the rotating block, so that the rotating block is squeezed by the top block and rotates. When the rotating block rotates to the point where the angle is aligned with the through groove of the fixed block, without the obstruction of the rotating block, the air cap head can be pulled, so that the air cap head drives the fixed block and the insert block to separate, thus facilitating the replacement of the worn air cap head. This is the characteristic of the use of the air cap for circulating fluidized bed boiler.

[0014] 1. When the air cap of this circulating fluidized bed boiler needs to be replaced, simply push the top rod towards the rotating block, so that the top rod squeezes the rotating block. The rotating block will rotate towards the side of the insertion block when squeezed. At this time, the rotating block will be aligned with the through groove of the fixed block. Without the obstruction of the rotating block, the air cap head can be separated from the tube core, thus facilitating the replacement of the air cap head.

[0015] 2. When installing the air cap for the circulating fluidized bed boiler, the air cap head can be squeezed and fitted to the tube core. At this time, the sealing block in the circular groove on the inner wall of the air cap head is deformed by the compression of the fixing ring on the inner wall of the air cap head and the pressure ring on the outer side of the tube core. Through the deformation of the sealing block, it can be fitted to the outer side of the tube core, thereby preventing gas from escaping from the air cap head and increasing the sealing effect of the entire air cap head. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main sectional view of the present invention;

[0017] Figure 2 This is a schematic diagram of the front sectional view of the sealing block of this utility model;

[0018] Figure 3 This is a schematic diagram of the front sectional view of the fixing block of this utility model;

[0019] Figure 4 This is a three-dimensional cross-sectional view of the fixing block of this utility model.

[0020] In the diagram: 1. Vent head; 2. Tube core; 3. Air outlet; 4. Fixing block; 5. Insert block; 6. Telescopic spring; 7. Telescopic block; 8. Connecting rod; 9. Rotating block; 10. Top rod; 11. Sliding block; 12. Circular groove; 13. Sealing block; 14. Pressure ring; 15. Fixing ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1 This utility model provides a technical solution: a wind cap for a circulating fluidized bed boiler, comprising: a wind cap head 1 and an air outlet 3, wherein a tube core 2 is inserted into the bottom of the wind cap head 1, and the air outlet 3 is opened on the outside of the wind cap head 1.

[0023] Fixed blocks 4 are installed on both sides of the core 2. An insert block 5 is inserted into the middle of the fixed blocks 4. A telescopic spring 6 is installed inside the insert block 5 through a groove. One end of the telescopic spring 6 is connected to a telescopic block 7 that passes through the groove of the insert block 5. One end of the telescopic block 7 is connected to a connecting rod 8. The end of the connecting rod 8 away from the telescopic block 7 is connected to a rotating block 9 through a rotating shaft. One end of the rotating block 9 is connected to the groove of the insert block 5 through a rotating shaft. A top rod 10 is provided on one side of the rotating block 9. A sliding block 11 is connected between one side of the top rod 10 and the sliding groove of the insert block 5. The sliding block 11 is slidably connected in the sliding groove on one side of the insert block 5. The insert block 5 is installed in the groove of the hood head 1. The rotating block 9 and the insert block 5 form a rotating structure through the rotating shaft. The telescopic block 7 and the groove of the insert block 5 form a telescopic structure through the telescopic spring 6.

[0024] In specific implementation, when the air cap 1 of the circulating fluidized bed boiler needs to be disassembled and replaced, it is only necessary to push the top rod 10 on one side of the insert block 5 so that the top rod 10 slides along the insert block 5 through the sliding block 11 on one side. When the insert block 5 slides, it will squeeze the rotating block 9 on one side. The rotating block 9 will rotate through the rotating shaft in the groove of the insert block 5 due to the squeezing of the insert block 5. When the rotating block 9 rotates, it will push the connecting rod 8 to rotate. Since both ends of the connecting rod 8 are connected between the telescopic block 7 and the rotating block 9 through the rotating shaft, the rotating block 9 will cause the connecting rod 8 to rotate when it rotates. The connecting rod 8 will squeeze the telescopic block 7 into the groove of the insert block 5, so that the telescopic spring 6 in the groove of the insert block 5 is in a compressed state. When the rotating block 9 is aligned with the through groove of the fixed block 4, the fixed block 4 is no longer limited by the rotating block 9, and the air cap 1 can be removed from the top of the tube core 2, so as to facilitate the replacement of the worn air cap 1.

[0025] When installing the hood head 1, simply attach the hood head 1 to the outside of the tube core 2. During the insertion of the hood head 1, the fixing block 4 presses against the rotating block 9. Then the rotating block 9 rotates again and, through the connecting rod 8 and the telescopic block 7, presses against the telescopic spring 6. When the fixing block 4 and the rotating block 9 are misaligned, the rotating block 9 will push the connecting rod 8 and the rotating block 9 to rotate in the opposite direction through the reset action of the telescopic spring 6 and the telescopic block 7. At this time, the rotating block 9 and the insert block 5 can limit the fixing block 4 in the hood head 1, thus facilitating the connection between the hood head 1 and the tube core 2.

[0026] See Figure 1 , Figure 3 and Figure 4 It can be seen that when the hood head 1 needs to be replaced, simply push the push rod 10. The push rod 10 will squeeze the rotating block 9 through the sliding block 11. The rotating block 9 will rotate to the side of the insert block 5 when squeezed, so that the rotating block 9 is aligned with the through groove of the fixed block 4. Without the limiting effect of the rotating block 9 on the fixed block 4, the hood head 1 can be separated from the tube core 2, making it convenient to replace the hood head 1.

[0027] The inside of the hood head 1 is provided with a circular groove 12, and a sealing block 13 is installed inside the circular groove 12. A pressure ring 14 is provided at one end of the sealing block 13, and a fixing ring 15 is provided at the other end of the sealing block 13 away from the pressure ring 14. The fixing ring 15 is installed on the inner wall of the hood head 1, and the pressure ring 14 is installed on the outer side of the tube core 2.

[0028] In practical implementation, when installing the air cap 1 for the circulating fluidized bed boiler, the air cap 1 can be squeezed to make the air cap 1 and the tube core 2 fit tightly together. At this time, the fixing ring 15 on the inner wall of the air cap 1 and the sealing block 13 on the inner wall of the circular groove 12 will move towards the pressure ring 14 on the outer side of the tube core 2. Since the sealing block 13 is made of rubber, the sealing block 13 in the circular groove 12 on the inner wall of the air cap 1 will expand to the other end under the pressure of the pressure block. The other side of the sealing block 13 is blocked by the fixing ring 15 and cannot continue to expand. Thus, the sealing block 13 can only expand towards the tube core 2. At this time, the sealing block 13 can seal the gap between the tube core 2 and the air cap 1, so that the internal gas will not escape from the gap between the tube core 2 and the air cap 1, thereby increasing the sealing effect of the entire air cap 1.

[0029] See Figure 1 and Figure 2It can be seen that during use, the vent cap 1 and the tube core 2 can be tightly fitted together, so that the fixing ring 15 on the inner wall of the vent cap 1 and the pressure ring 14 on the outer side of the tube core 2 can squeeze the sealing block 13 in the middle of the vent cap 1. At this time, the sealing block 13 will deform. Through the deformation of the sealing block 13, it can be fitted to the outer side of the tube core 2, thereby increasing the sealing effect between the vent cap 1 and the tube core 2 and preventing gas leakage.

[0030] In summary: When using this circulating fluidized bed boiler air cap, the air cap head 1 can be installed on the outside of the tube core 2, and then the entire air cap head 1 can be installed on the air distribution plate. At this time, the gas entering the air cap head 1 will be blown into the furnace through the air outlet, thereby lifting the bed material and forming the so-called "fluidized bed". The existence of the fluidized bed allows the fuel and air to be fully mixed, thereby achieving a more efficient and cleaner combustion process. This is the characteristic of the use of this circulating fluidized bed boiler air cap. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wind cap for a circulating fluidized bed boiler, comprising: The hood head (1) and the air outlet (3) are characterized in that: the bottom of the hood head (1) is inserted with a tube core (2), and the air outlet (3) is arranged on the outer side of the hood head (1). Both sides of the tube core (2) are provided with fixed blocks (4), the middle of the fixed block (4) is inserted with an insertion block (5), the inside of the insertion block (5) is provided with a telescopic spring (6) through a groove, one end of the telescopic spring (6) is connected with a telescopic block (7) penetrating the groove of the insertion block (5), one end of the telescopic block (7) is connected with a connecting rod (8), the end of the connecting rod (8) away from the telescopic block (7) is connected with a rotating block (9) through a rotating shaft, one end of the rotating block (9) is connected in the groove of the insertion block (5) through a rotating shaft.

2. A wind cap for a circulating fluidized bed boiler according to claim 1, characterized in that: One side of the rotating block (9) is provided with a top rod (10), one side of the top rod (10) is connected with a sliding block (11) between the sliding groove of the insertion block (5).

3. A wind cap for a circulating fluidized bed boiler according to claim 2, characterized in that: The sliding block (11) is slidingly connected in the sliding groove on one side of the insertion block (5), and the insertion block (5) is installed in the groove of the hood head (1).

4. A wind cap for a circulating fluidized bed boiler according to claim 1, characterized in that: The rotating block (9) and the insertion block (5) constitute a rotating structure through the rotating shaft.

5. A wind cap for a circulating fluidized bed boiler according to claim 1, characterized in that: The inside of the hood head (1) is provided with a circular groove (12), and the inside of the circular groove (12) is provided with a sealing block (13).

6. A wind cap for a circulating fluidized bed boiler according to claim 5, characterized in that: One end of the sealing block (13) is provided with a compression ring (14), and the end of the sealing block (13) away from the compression ring (14) is provided with a fixed ring (15).

7. A wind cap for a circulating fluidized bed boiler according to claim 6, characterized in that: The fixed ring (15) is installed on the inner wall of the hood head (1).

Images