Pulverized coal burner with adjustable air output

Abstract

The pulverized coal burner comprises a burner body, an air inlet pipe is fixedly connected to the upper portion of one side of the burner body, a lantern ring is rotationally connected to the outer side of the air inlet pipe, a control panel is fixedly connected to the interior of the side, close to the lantern ring, of the air inlet pipe, and a first vent hole is formed in the middle of the control panel; a plurality of sets of adjusting holes are formed in the two sides of the control plate, two sets of sector plates tightly attached to the control plate are fixedly connected into the lantern ring, and second vent holes right opposite to the first vent holes are formed in the sector plates, so that the air inlet amount of the pulverized coal burner can be controlled, and the mixing proportion of pulverized coal and air can be accurately controlled; and sufficient oxygen supply of the pulverized coal in the combustion process is ensured, so that the combustion efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of pulverized coal burners, in particular to a pulverized coal burner with adjustable air supply volume. Background Technique

[0002] The pulverized coal burner realizes full combustion by a specially designed multi-stage and multi-nozzle air supply guiding structure, which enables the pulverized coal to generate high-temperature eddy currents in a short time. It is widely used in various annealing furnaces, metal heating furnaces, quenching furnaces, precision casting shell burning furnaces, melting furnaces, forging furnaces and other heating furnaces.

[0003] The traditional pulverized coal burner adjusts the air supply volume of the pulverized coal burner by manipulating the power of the induced draft fan, resulting in the over-reliance of the pulverized coal burner on the air volume adjustment of the induced draft fan. However, the service life of the power structures such as the induced draft fan is limited, making the traditional pulverized coal burner lack a mechanical structure for adjusting the induced air volume. Content of the Utility Model

[0004] The purpose of the utility model is to provide a pulverized coal burner with adjustable air supply volume to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A pulverized coal burner with adjustable air supply volume, including a burner, a gas inlet pipe is fixedly connected to the upper part of one side of the burner, a collar is rotatably connected to the outside of the gas inlet pipe, a control board is fixedly connected to the inside of the gas inlet pipe near the collar, a first ventilation hole is opened in the middle of the control board, several groups of adjustment holes are opened on both sides of the control board, two sector plates closely attached to the control board are fixedly connected to the inside of the collar, and a second ventilation hole facing the first ventilation hole is opened in the sector plate.

[0006] Preferably, two rotation grooves are opened on the outside of the gas inlet pipe, two rotation pieces are fixedly connected to the inside of the collar, and the rotation pieces are rotatably connected to the inside of the rotation grooves.

[0007] Preferably, a connecting piece is fixedly connected to one side of the upper part of the collar, a first threaded rod is threadedly connected to the inside of the connecting piece, and three fixing holes for cooperating with the first threaded rod are opened on the outside of the gas inlet pipe.

[0008] Preferably, a sliding groove is opened on the outside of the gas inlet pipe, an exhaust hole communicated with the sliding groove is opened on the outside of the gas inlet pipe, and a shielding ring closely attached to the sliding groove is slidably connected to the inside of the sliding groove.

[0009] Preferably, two groups of second connecting plates are fixedly connected to one end of the sliding groove, a first connecting plate facing the second connecting plate is fixedly connected to one side of the blocking ring, a sliding rod is fixedly connected to the second connecting plate on one side, the sliding rod penetrates the first connecting plate and is fixedly connected to a limiting plate, and a second threaded rod is rotatably connected to the second connecting plate on the other side, and the second threaded rod is threadedly connected to the inside of the first connecting plate.

[0010] Preferably, a flange is fixedly connected to one side of the air inlet pipe, and a feed pipe is fixedly connected to the middle part of one side of the burner.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model allows air to enter the burner along the air intake pipe, and the gas enters through the second air vent in the middle of the fan-shaped plate and the first air vent on the control plate. By rotating the collar, the fan-shaped plate blocks different numbers of adjustment holes. By connecting the first threaded rod to the fixed holes at different positions, the position of the collar is fixed when the fan-shaped plate blocks different numbers of adjustment holes, thereby changing the air supply volume of the air intake pipe, being able to control the air intake volume of the pulverized coal burner, being able to accurately control the mixing ratio of pulverized coal and air, ensuring that the pulverized coal is adequately supplied with oxygen during the combustion process, thereby improving the combustion efficiency.

[0013] The utility model also rotates the second threaded rod so that the first connecting piece drives the shielding ring to slide along the inside of the sliding groove to shield the exhaust holes. By adjusting the number of exposed exhaust holes, the gas in the intake pipe is depressurized to control the intake volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model from the first viewing angle;

[0015] Figure 2 This is a cross-sectional view of the air intake pipe structure from a second viewing angle of the utility model;

[0016] Figure 3 This is a schematic diagram of the intake pipe structure of the utility model from the third viewing angle.

[0017] In the figure: 1. burner; 2. air inlet pipe; 3. flange; 4. feed pipe; 5. collar; 6. rotating groove; 7. rotating plate; 8. control plate; 9. first air vent; 10. adjusting hole; 11. fan-shaped plate; 12. second air vent; 13. connecting plate; 14. first threaded rod; 15. fixing hole; 16. sliding groove; 17. exhaust hole; 18. shielding ring; 19. first connecting plate; 20. second connecting plate; 21. sliding rod; 22. limiting plate; 23. second threaded rod. DETAILED DESCRIPTION

[0018] 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. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the protection scope of the present utility model.

[0019] Please refer to Figures 1-3 , the present utility model provides a technical solution: a pulverized coal burner with adjustable air supply volume, including a burner 1. A gas inlet pipe 2 is fixedly welded to the upper part on one side of the burner 1. A collar 5 is rotatably connected to the outside of the gas inlet pipe 2. A control plate 8 is fixedly welded to the inside of the gas inlet pipe 2 near the collar 5. A first ventilation hole 9 is opened in the middle of the control plate 8. A number of groups of adjustment holes 10 are opened on both sides of the control plate 8. Two sector plates 11 that are closely attached to the control plate 8 are fixedly welded inside the collar 5. A second ventilation hole 12 facing the first ventilation hole 9 is opened inside the sector plate 11. Air can enter the burner 1 along the gas inlet pipe 2. The gas enters through the second ventilation hole 12 in the middle of the sector plate 11 and the first ventilation hole 9 of the control plate 8. By rotating the collar 5, the sector plate 11 blocks different numbers of adjustment holes 10, thereby changing the air supply volume of the gas inlet pipe 2;

[0020] Two sets of rotating grooves 6 are formed on the outer side of the intake pipe 2. Two rotating vanes 7 are fixedly welded inside the collar 5. The rotating vanes 7 are rotatably installed inside the rotating grooves 6 to connect two sections of the intake pipe 2 and ensure that the collar 5 can rotate smoothly. One side of the upper part of the collar 5 is fixedly welded with a connecting piece 13. A first threaded rod 14 is threadedly installed inside the connecting piece 13. Three fixing holes 15 for matching the first threaded rod 14 are formed on the outer side of the intake pipe 2. By connecting the first threaded rod 14 to different fixing holes 15, when the sector plate 11 blocks different numbers of adjusting holes 10, the position of the collar 5 is fixed. A sliding groove 16 is formed on the outer side of the intake pipe 2. An exhaust hole 17 communicating with the sliding groove 16 is formed on the outer side of the intake pipe 2. A shielding ring 18 closely attached to the sliding groove 16 is slidably installed inside the sliding groove 16. By sliding the shielding ring 18 along the sliding groove 16, the exhaust hole 17 is shielded. By adjusting the number of exposed exhaust holes 17, the gas inside the intake pipe 2 is depressurized to control the intake air volume. Two second connecting pieces 20 are fixedly welded at one end of the sliding groove 16. A first connecting piece 19 facing the second connecting pieces 20 is fixedly welded on one side of the shielding ring 18. A sliding rod 21 is fixedly welded to one of the second connecting pieces 20. The sliding rod 21 penetrates through the first connecting piece 19 and is fixedly welded with a limiting piece 22. The other second connecting piece 20 is rotatably connected with a second threaded rod 23. The second threaded rod 23 is threaded inside the first connecting piece 19. By rotating the second threaded rod 23, the first connecting piece 19 drives the shielding ring 18 to slide inside the sliding groove 16, thereby controlling the position of the shielding ring 18. A flange 3 is fixedly welded on one side of the intake pipe 2 for connecting with an external induced draft fan. A feed pipe 4 is fixedly welded in the middle of one side of the burner 1 for conveying pulverized coal.

[0021] Working principle: When the utility model is in use, air can enter the burner 1 along the intake pipe 2. The gas enters through the second ventilation hole 12 in the middle of the sector plate 11 and the first ventilation hole 9 of the control plate 8. By rotating the collar 5, the sector plate 11 blocks different numbers of adjusting holes 10. By connecting the first threaded rod 14 to different fixing holes 15, when the sector plate 11 blocks different numbers of adjusting holes 10, the position of the collar 5 is fixed, thereby changing the air supply volume of the intake pipe 2. By rotating the second threaded rod 23, the first connecting piece 19 drives the shielding ring 18 to slide inside the sliding groove 16 to shield the exhaust hole 17. By adjusting the number of exposed exhaust holes 17, the gas inside the intake pipe 2 is depressurized to control the intake air volume.

[0022] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0023] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pulverized coal burner with adjustable air delivery volume, comprising a burner (1), characterized in that: On the upper part of one side of the burner (1), an air inlet pipe (2) is fixedly connected. A collar (5) is rotatably connected to the outside of the air inlet pipe (2). A control board (8) is fixedly connected to the inside of the air inlet pipe (2) near the collar (5). A first ventilation hole (9) is formed in the middle of the control board (8). A number of groups of adjustment holes (10) are formed on both sides of the control board (8). Two sector plates (11) that closely adhere to the control board (8) are fixedly connected to the inside of the collar (5). A second ventilation hole (12) that is aligned with the first ventilation hole (9) is formed in the sector plate (11).

2. The pulverized coal burner with adjustable air supply volume according to claim 1, characterized in that: Two rotation grooves (6) are formed on the outside of the air inlet pipe (2). Two rotation pieces (7) are fixedly connected to the inside of the collar (5). The rotation pieces (7) are rotatably connected to the inside of the rotation grooves (6).

3. The pulverized coal burner with adjustable air delivery volume according to claim 1, characterized in that: A connection piece (13) is fixedly connected to one side of the upper part of the collar (5). A first threaded rod (14) is threadedly connected to the inside of the connection piece (13). Three fixing holes (15) that cooperate with the first threaded rod (14) are formed on the outside of the air inlet pipe (2).

4. A pulverized coal burner with adjustable air delivery volume according to claim 1, characterized in that: A sliding groove (16) is formed on the outside of the air inlet pipe (2). An exhaust hole (17) that communicates with the sliding groove (16) is formed on the outside of the air inlet pipe (2). A shielding ring (18) that closely adheres to the sliding groove (16) is slidably connected to the inside of the sliding groove (16).

5. The pulverized coal burner with adjustable air delivery volume according to claim 4, characterized in that: Two second connection pieces (20) are fixedly connected to one end of the sliding groove (16). A first connection piece (19) that is aligned with the second connection pieces (20) is fixedly connected to one side of the shielding ring (18). A sliding rod (21) is fixedly connected to one of the second connection pieces (20). The sliding rod (21) penetrates through the first connection piece (19) and is fixedly connected to a limiting piece (22). A second threaded rod (23) is rotatably connected to the other second connection piece (20). The second threaded rod (23) is threadedly connected to the inside of the first connection piece (19).

6. The pulverized coal burner with adjustable air delivery volume according to claim 1, wherein: A flange (3) is fixedly connected to one side of the air inlet pipe (2). A feed pipe (4) is fixedly connected to the middle of one side of the burner (1).

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