Air cannon for unblocking coal bunker of boiler

Abstract

The utility model provides an air cannon for unblocking a coal bunker of a boiler, which comprises a feed bin, an air storage tank and a delivery pipe are arranged on the feed bin, the air storage tank is connected with the delivery pipe through a connecting pipe, a plurality of through holes are uniformly distributed on the delivery pipe, and the through holes are communicated with the air storage tank. A through hole is formed in the feeding bin, a branch pipe penetrating through and extending into the feeding bin is arranged on the through hole, two elastic mechanisms are arranged in the branch pipe in a spaced mode, a connecting plate matched with the branch pipe is arranged between the two elastic mechanisms, a plurality of crushing parts and guide pipes are arranged on the connecting plate, the connecting plate is pushed by gas, and the crushing parts and the guide pipes are arranged on the connecting plate. And the broken pieces are discharged out of the branch pipe, and the feeding bin is dredged.

Description

Technical Field

[0001] The utility model relates to the technical field of air cannons, in particular to an air cannon for clearing blockages in a boiler coal bunker. Background Art

[0002] Most of the boilers in thermal power plants are coal-fired boilers, and each boiler needs to be equipped with a coal bunker. During normal operation, due to factors such as wet coal and fine coal, some coal blocks will adhere to the surface of the coal bunker, resulting in blockage of the coal bunker feed port. In the prior art, it is generally dredged through an air cannon pipeline, and the accumulated coal blocks are blown away by high-pressure wind.

[0003] However, the wind pressure is limited. When there is a large backlog of coal blocks, the coal blocks are squeezed and agglomerated with each other, resulting in an unsatisfactory wind dredging effect. Therefore, an air cannon for clearing blockages in a boiler coal bunker is proposed to solve the above problems. Content of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model provides an air cannon for clearing blockages in a boiler coal bunker, which has the advantages of strong dredging effect and can dredge the feed port according to various situations, and solves the technical problem that the wind negative pressure is limited and it is impossible to complete dredging only by wind when there is a large backlog of coal blocks.

[0005] To achieve the above object, the utility model provides the following technical solution: an air cannon for clearing blockages in a boiler coal bunker, including a feed bin, a gas storage tank and a delivery pipe are arranged on the feed bin, the gas storage tank and the delivery pipe are connected by a connecting pipe, a plurality of through holes are evenly arranged on the delivery pipe, a branch pipe that penetrates and extends into the feed bin is arranged on the through hole, two elastic mechanisms are arranged at intervals in the branch pipe, a connecting plate adapted to the branch pipe is arranged between the two elastic mechanisms, a plurality of crushing parts and a conduit are arranged on the connecting plate, and gas pushes the connecting plate so that the crushing parts extend out of the branch pipe and dredge the feed bin.

[0006] Further, the number of the gas storage tank and the delivery pipe can be four, and the four gas storage tanks and delivery pipes are respectively and evenly arranged on four surfaces of the feed bin.

[0007] Further, the delivery pipe includes two mounting plates arranged at intervals left and right on the feed bin, and a delivery pipe is arranged between the two mounting plates.

[0008] Further, the elastic mechanism includes a limiting rod, mounting grooves are respectively arranged on the left and right walls of the branch pipe, the limiting rod is installed in the mounting groove, a connecting block fixedly connected with the connecting plate is slidably arranged on the limiting rod, two springs are fixedly sleeved on the limiting rod, and the two springs are fixed to the mounting groove at the ends away from each other and fixed to the connecting block at the ends close to each other.

[0009] Furthermore, the crushing member is a striking rod with a convex outer surface. An external thread is provided at one end of the striking rod close to the connecting plate. A threaded connection hole is provided on the connecting plate, and the striking rod is threadedly connected to the connecting plate through the external thread.

[0010] Compared with the prior art, the technical solution of the present application has the following beneficial effects: By providing a connecting block, an elastic mechanism and a conduit in the branch pipe, in the case of a more serious blockage, the conduit is closed, so that the air flow pushes the connecting block, and the crushing member on the connecting block impacts the blocked coal block to break it, for cleaning the blockage. In the case of a smaller blockage, the conduit is opened, so that the gas is discharged from the conduit for cleaning the blockage. These two options make the cleaning effect better. Description of the Drawings

[0011] Figure 1 is a perspective view of the present utility model;

[0012] Figure 2 is a sectional view of the structure of the branch pipe of the present utility model;

[0013] Figure 3 is a right sectional view of the structure of the branch pipe of the present utility model.

[0014] In the figure: 1, feed bin; 2, mounting plate; 3, conveying pipe; 4, gas storage tank; 5, connecting pipe; 6, branch pipe; 7, first control valve; 8, mounting groove; 9, limiting rod; 10, connecting block; 11, spring; 12, connecting plate; 13, conduit; 14, second control valve; 15, striking rod. Detailed Embodiments

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0016] Please refer to Figures 1-3, An air cannon for unclogging a boiler coal bunker in this embodiment includes a feed bin 1. A gas storage tank 4 and a delivery pipe are arranged on the feed bin 1. The gas storage tank 4 and the delivery pipe are connected by a connecting pipe 5. A plurality of through holes are evenly distributed on the delivery pipe. A branch pipe 6 that penetrates and extends into the feed bin 1 is arranged on the through hole. A first control valve 7 is arranged on the branch pipe 6. After the first control valve 7 is opened, the branch pipe 6 is in an open state, and air can be introduced into the branch pipe 6 to carry out the unclogging work. Two elastic mechanisms are arranged at intervals in the branch pipe 6. A connecting plate 12 adapted to the branch pipe 6 is arranged between the two elastic mechanisms. A plurality of crushing members and a conduit 13 are arranged on the connecting plate 12. A second control valve 14 is arranged in the conduit 13. In the case of relatively light blockage, the conduit 13 is opened through the second control valve 14, and high-pressure air is used for dredging. In the case of relatively serious blockage, the conduit 13 is closed, so that the gas pushes the connecting plate 12, causing the crushing members to pop out of the branch pipe 6 to impact and crush the coal blocks, and then cleaning is carried out through the air cannon and the feed bin 1 is dredged.

[0017] In this embodiment, in the case of relatively light blockage, the second control valve 14 is opened. The gas storage tank 4 is transported to the branch pipe 6 through the delivery pipe, and then discharged into the feed bin 1 from the conduit 13 in the branch pipe 6. The coal blocks are blown by the high-pressure gas to dredge the coal blocks. When the accumulation is serious, the branch pipe 6 is closed through the second control valve 14. At this time, the high-pressure gas pushes the connecting plate 12 to accelerate displacement, so that the crushing members on the connecting plate 12 impact the coal blocks, thereby dispersing the coal blocks, and then normal air dredging is carried out to adapt to different blockage situations.

[0018] Preferably, as another embodiment of the present invention, there may be four gas storage tanks 4 and delivery pipes. The four gas storage tanks 4 and delivery pipes are respectively and evenly arranged on the four sides of the feed bin 1.

[0019] In this embodiment, through the four gas storage pipes and delivery pipes, the feed bin 1 can be dredged from multiple directions, making the dredging effect better.

[0020] Preferably, as another embodiment of the present invention, the delivery pipe includes two mounting plates 2 arranged at a left-right interval on the feed bin 1, and a delivery pipe 3 is arranged between the two mounting plates 2.

[0021] In this embodiment, the gas is discharged from the gas storage tank 4 to the connecting pipe 5 and then transported into the delivery pipe 3 by the connecting pipe 5.

[0022] Preferably, as another embodiment of the present utility model, the elastic mechanism includes a limiting rod 9. Installation grooves 8 are formed on the left and right walls of the branch pipe 6. The limiting rod 9 is installed in the installation grooves 8. A connecting block 10 fixedly connected to the connecting plate 12 is slidably arranged on the limiting rod 9. Two springs 11 are fixedly sleeved on the limiting rod 9. One end of the two springs 11 facing away from each other is fixed to the installation groove 8, and the adjacent end is fixed to the connecting block 10.

[0023] In this embodiment, when the connecting plate 12 is pushed by the wind force, the connecting plate 12 drives the connecting block 10 to move. The limiting rod 9 limits the connecting block 10, so that the connecting plate 12 moves in a straight line. At the same time, when the connecting block 10 moves, the connecting block 10 can compress the spring 11. When the thrust is lost, the connecting block 10 can drive the connecting plate 12 to reset to wait for the next operation.

[0024] Preferably, as another embodiment of the present utility model, the crushing member is a striking rod 15 with a convex outer surface. An external thread is provided at one end of the striking rod 15 close to the connecting plate 12. A threaded connection hole is formed on the connecting plate 12, and the striking rod 15 is threadedly connected to the connecting plate 12 through the external thread.

[0025] In this embodiment, it is convenient to replace the striking rod 15 that has been knocked off.

[0026] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An air cannon for clearing blockage in a boiler coal bunker, comprising a feed bunker (1), characterized in that: A gas storage tank (4) and a conveying pipe (3) are arranged on the feed bin (1). The gas storage tank (4) and the conveying pipe are connected via a connecting pipe (5). A plurality of through holes are evenly distributed on the conveying pipe (3). A branch pipe (6) is arranged on the through hole and passes through and extends into the feed bin (1). Two elastic mechanisms are arranged at intervals in the branch pipe (6). A connecting plate (12) adapted to the branch pipe (6) is arranged between the two elastic mechanisms. A plurality of crushing parts and a guide tube (13) are arranged on the connecting plate (12). The gas pushes the connecting plate (12) so that the crushing parts go out of the branch pipe (6) and collide with the coal blocks.

2. The air cannon for clearing blockage in a boiler coal bunker according to claim 1 is characterized in that: There may be four gas storage tanks (4) and four delivery pipes, and the four gas storage tanks (4) and the four delivery pipes are evenly distributed on four sides of the feed bin (1).

3. The air cannon for clearing blockage in a boiler coal bunker according to claim 2 is characterized in that: The conveying pipe comprises two mounting plates (2) which are arranged on the feed bin (1) at intervals on the left and right, and a conveying pipe (3) is arranged between the two mounting plates (2).

4. The air cannon for clearing blockage in a boiler coal bunker according to claim 1 is characterized in that: The elastic mechanism comprises a limit rod (9), and mounting grooves (8) are provided on the left and right walls of the branch pipe (6). The limit rod (9) is installed in the mounting groove (8), and a connecting block (10) fixedly connected to the connecting plate (12) is slidably provided on the limit rod (9). Two springs (11) are fixedly sleeved on the limit rod (9), and the separated ends of the two springs (11) are fixed to the mounting groove (8), and the close ends are fixed to the connecting block (10).

5. The air cannon for clearing blockage in a boiler coal bunker according to claim 1 is characterized in that: The crushing member is a striker rod (15) with a protruding surface, an end of the striker rod (15) close to the connecting plate (12) is provided with an external thread, a threaded connection hole is provided on the connecting plate (12), and the striker rod (15) is threadedly connected to the connecting plate (12) via the external thread.

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