Combustor tuyere flexible connection structure

Abstract

The utility model relates to pipeline connection technical field discloses a burner tuyere soft connection structure, including air inlet end, air outlet end and with connecting air inlet end and air outlet end connecting mechanism, the connecting mechanism includes front flange, rear flange and bellows, the both ends of bellows are fixedly connected with front flange and rear flange respectively, the front flange is fixedly connected with air inlet end through bolt, the rear flange is detachably connected with air outlet end, the utility model provides a burner tuyere soft connection structure, and the cooperation of front flange, rear flange and bellows can adjust the interval of front flange and rear flange through stretching bellows, makes it adapt to different interval air inlet end and air outlet end when installing, through the guiding mechanism arranged in the bellows, the inner wall of bellows can be made flat, and the turbulent flow caused by the concave collision of gas and the inner wall of bellows when passing through the bellows is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection technology, specifically to a flexible connection structure for burner air outlets. Background Technology

[0002] In industrial combustion equipment (such as boilers, heating furnaces, and blast furnaces), the connection between the burner and the air duct (air inlet) or furnace (air outlet) is a critical link. This connection not only needs to ensure airtightness to prevent gas leakage from affecting combustion efficiency and safety, but also needs to have a certain degree of adaptability to cope with factors such as alignment errors during equipment installation, displacement caused by thermal expansion and contraction, and equipment vibration.

[0003] Currently, common burner vent connection methods mainly include canvas connection, rigid flange connection, and bellows connection. However, each of these connection methods has certain shortcomings in use. Canvas connection is easily affected by wind pressure during use, has low durability, and is prone to damage. Rigid flange connection requires bolts to directly connect the flange to the inlet and outlet, which requires high precision. After installation, the flange spacing is fixed and cannot adapt to the spacing differences that may occur when adjusting the equipment or replacing different models. Although bellows connection does not require precision, the bellows are prone to compression or stretching deformation during installation due to their elasticity, making installation difficult. At the same time, the inner wall of the bellows has many uneven surfaces. When gas flows through at high speed, eddies and separation phenomena will be generated in these depressions, affecting the airflow speed. Therefore, a device is needed to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a flexible connection structure for burner vents, which solves the problems of insufficient flexibility in size adjustment and easy turbulence formation on the inner wall during installation of existing connection mechanisms.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a burner air outlet flexible connection structure, including an air inlet end, an air outlet end, and a connection mechanism for connecting the air inlet end and the air outlet end. The connection mechanism includes a front flange, a rear flange, and a bellows. The two ends of the bellows are fixedly connected to the front flange and the rear flange, respectively. The front flange is fixedly connected to the air inlet end by bolts, and the rear flange is detachably connected to the air outlet end.

[0006] The bellows has an internal guide mechanism to improve the flatness of the inner wall of the bellows. Both sides of the front flange and the rear flange are fixedly connected to a connecting seat. A guide rod is connected through the middle of the connecting seat. The connecting seat is provided with a fixing nut on the outside of the front flange and the rear flange. The fixing nut is threaded to the guide rod to limit the expansion and contraction length of the bellows.

[0007] Optionally, the guiding mechanism includes a sleeve and a connecting sleeve, which are fixedly connected to opposite sides of the front flange and the rear flange, respectively, with the end of the sleeve away from the front flange fitted onto the outer surface of the connecting sleeve.

[0008] Optionally, the sleeve is provided with a limiting mechanism inside to restrict the movement direction of the sleeve and the connecting cylinder.

[0009] Optionally, the limiting mechanism includes a guide groove and a guide block. The guide groove is formed on the inner wall of the sleeve, and the guide block is fixedly connected to the upper and lower surfaces of the connecting cylinder. The guide block is slidably connected to the guide groove.

[0010] Optionally, a sealing gasket is fixedly connected to both the front flange near the air inlet and the rear flange near the air outlet. The sealing gasket is used to seal the gaps between the front flange and the air inlet, and between the rear flange and the air outlet.

[0011] Optionally, the outer surface of the guide rod is provided with a clamping mechanism at the position between the front flange and the rear flange to push the front flange and the rear flange to move to both ends.

[0012] Optionally, the clamping mechanism includes a housing, a compression spring, and a stop block. The stop block is fixedly connected to the outer surface of the guide rod. The housing is sleeved on the outer surface of the stop block and slidably connected to the stop block. One end of the housing away from the stop block is attached to one side of the connecting seat. One end of the compression spring is fixedly connected to the inside of the housing, and the other end is attached to the stop block to push the housing to one side.

[0013] Optionally, a limiting block is fixedly connected to the inner side of one end of the housing, the limiting block being used to prevent the housing from detaching from the stop block.

[0014] This utility model provides a flexible connection structure for burner air outlets, which has the following beneficial effects:

[0015] This utility model provides a flexible connection structure for burner air outlets. Through the coordinated arrangement of a front flange, a rear flange, and a bellows, the distance between the front and rear flanges can be adjusted by stretching the bellows, allowing it to adapt to air inlets and outlets with different spacing during installation, thus improving the flexibility of the device. The connecting seats, guide rods, and fixing nuts at both ends of the flanges prevent flange movement during installation, making it easier to install the equipment. The guide mechanism inside the bellows makes the inner wall of the bellows smooth, reducing turbulence caused by gas colliding with the concave areas of the bellows' inner wall as it passes through, thereby increasing the airflow speed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the unfolded structure of this utility model;

[0018] Figure 3 This is a cross-sectional structural schematic diagram of the clamping mechanism of this utility model;

[0019] Figure 4 This is a cross-sectional structural schematic diagram of the corrugated pipe of this utility model;

[0020] Figure 5 This is a schematic diagram of the rear flange of this utility model.

[0021] In the diagram: 1. Air inlet; 2. Air outlet; 3. Front flange; 4. Rear flange; 5. Bellows; 6. Connecting seat; 7. Guide rod; 8. Fixing nut; 9. Sleeve; 10. Connecting cylinder; 11. Guide groove; 12. Guide block; 13. Sealing gasket; 14. Housing; 15. Compression spring; 16. Stop block; 17. Limit block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figures 1 to 5 The present invention provides a technical solution: a flexible connection structure for a burner air outlet, including an air inlet 1, an air outlet 2, and a connection mechanism for connecting the air inlet 1 and the air outlet 2. The connection mechanism includes a front flange 3, a rear flange 4, and a bellows 5. The two ends of the bellows 5 are fixedly connected to the front flange 3 and the rear flange 4, respectively. The front flange 3 is fixedly connected to the air inlet 1 by bolts, and the rear flange 4 is detachably connected to the air outlet 2.

[0024] The bellows 5 has an internal guide mechanism to improve the flatness of the inner wall of the bellows 5. Both sides of the front flange 3 and the rear flange 4 are fixedly connected to the connecting seat 6. The middle of the connecting seat 6 is connected to the guide rod 7. The connecting seat 6 is provided with a fixing nut 8 on the outside of the front flange 3 and the rear flange 4. The fixing nut 8 is threadedly connected to the guide rod 7 to limit the expansion and contraction length of the bellows 5.

[0025] The air outlet 2 is connected to the fan, guiding the air blown by the fan into the air outlet 2. The air inlet 1 is connected to the air inlet of the burner, introducing the supplied air into the burner. The bellows 5 is connected to the air inlet 1 and the air outlet 2 through the front flange 3 and the rear flange 4, guiding the air from the air outlet 2 into the air inlet 1. When the front flange 3 and the rear flange 4 move, the connecting seats 6 on both sides can extend and retract on the guide rod 7. The guide rod 7 restricts the movement direction of the flange. By rotating the fixing nut 8, the maximum distance between the two connecting seats 6 can be adjusted. During installation, the fixing nut 8 can be tightened to reduce the length of the bellows 5, making it easier to connect one end. After connection, the fixing nut 8 can be loosened to unfold the bellows 5 and facilitate the connection of the other end. The guide mechanism is located on the inner wall of the bellows 5, which can improve the flatness inside the bellows 5 and reduce the turbulence caused by the collision of air with the uneven parts of the inner wall of the bellows 5.

[0026] In this embodiment, as a preferred option, the guiding mechanism includes a sleeve 9 and a connecting cylinder 10. The sleeve 9 and the connecting cylinder 10 are respectively fixedly connected to the opposite side of the front flange 3 and the rear flange 4. The end of the sleeve 9 away from the front flange 3 is sleeved on the outer surface of the connecting cylinder 10. The sleeve 9 is provided with a limiting mechanism inside to limit the movement direction of the sleeve 9 and the connecting cylinder 10. The limiting mechanism includes a guide groove 11 and a guide block 12. The guide groove 11 is opened on the inner wall of the sleeve 9. The guide block 12 is fixedly connected to the upper and lower surfaces of the connecting cylinder 10. The guide block 12 is slidably connected to the guide groove 11.

[0027] During the expansion and contraction of the external bellows 5, the connecting cylinder 10 can slide inside the sleeve 9 to adapt to the expansion and contraction length of the bellows 5. When the connecting cylinder 10 and the sleeve 9 move, the guide block 12 on the connecting cylinder 10 will slide in the guide groove 11 to limit the movement distance of the connecting cylinder 10 and prevent the connecting cylinder 10 from separating from the sleeve 9.

[0028] In this embodiment, as a preferred option, a sealing gasket 13 is fixedly connected to the side of the front flange 3 near the air inlet 1 and the side of the rear flange 4 near the air outlet 2. The sealing gasket 13 is used to seal the gap between the front flange 3 and the air inlet 1 and the rear flange 4 and the air outlet 2.

[0029] The sealing gasket 13 fills the gaps between the front flange 3 and the rear flange 4 and the air inlet and outlet, preventing air from escaping from the gaps. This can increase the air pressure inside the bellows 5 and make the air flow faster.

[0030] In this embodiment, as a preferred option, a clamping mechanism is provided on the outer surface of the guide rod 7 at the position between the front flange 3 and the rear flange 4 to push the front flange 3 and the rear flange 4 to move to both ends. The clamping mechanism includes a housing 14, a compression spring 15 and a stop block 16. The stop block 16 is fixedly connected to the outer surface of the guide rod 7. The housing 14 is sleeved on the outer surface of the stop block 16 and is slidably connected to the stop block 16. One end of the housing 14 away from the stop block 16 is attached to one side of the connecting seat 6. One end of the compression spring 15 is fixedly connected to the inside of the housing 14 and the other end is attached to the stop block 16 to push the housing 14 to one side. A limit block 17 is fixedly connected to the inner side of one end of the housing 14 to prevent the housing 14 from coming off the stop block 16.

[0031] During the tightening of the fixing nut 8, the fixing nut 8 will compress the connecting seat 6, causing the front flange 3 and the rear flange 4 to move towards the middle, thereby compressing the distance between the front flange 3 and the rear flange 4, making installation more flexible. During the loosening of the fixing nut 8, the compression spring 15 will push the housing 14 and the stop block 16 to both sides, causing the housing 14 to push the connecting seat 6 to one side, thereby increasing the distance between the front flange 3 and the rear flange 4. After fixing one end, the overall length can be easily extended to fix the other end. The limiting block 17 limits the movement distance of the housing 14 to prevent the compression spring 15 from pushing the housing 14 off the stop block 16.

[0032] In this invention, the working steps of the device are as follows:

[0033] 1. Before installation, rotate the fixing nut 8 to tighten the internal compression spring 15, thereby shortening the length of the bellows 5, connecting the rear flange 4 to the air outlet 2 and fixing it with bolts.

[0034] 2. After the rear flange 4 is fixed, rotate the fixing nut 8 to loosen the compression spring 15, so that the compression spring 15 pushes the connecting seat 6 outward, causing the bellows 5 to extend. Adjust the position of the fixing nut 8 so that the front flange 3 of one end of the bellows 5 is connected to the air inlet 1. After both the front and rear ends are fixed, it can be used.

[0035] The specific embodiments provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A flexible connection structure for burner air outlets, characterized in that: It includes an air inlet (1), an air outlet (2), and a connecting mechanism for connecting the air inlet (1) and the air outlet (2). The connecting mechanism includes a front flange (3), a rear flange (4), and a bellows (5). The two ends of the bellows (5) are fixedly connected to the front flange (3) and the rear flange (4) respectively. The front flange (3) is fixedly connected to the air inlet (1) by bolts, and the rear flange (4) is detachably connected to the air outlet (2). The corrugated pipe (5) is provided with a guide mechanism inside to improve the flatness of the inner wall of the corrugated pipe (5). Both sides of the front flange (3) and the rear flange (4) are fixedly connected with connecting seats (6). A guide rod (7) is connected through the middle of the connecting seat (6). The connecting seat (6) is provided with fixing nuts (8) on the outside of the front flange (3) and the rear flange (4). The fixing nuts (8) are threadedly connected to the guide rod (7) to limit the extension and retraction length of the corrugated pipe (5).

2. The burner vent flexible connection structure according to claim 1, characterized in that: The guiding mechanism includes a sleeve (9) and a connecting sleeve (10). The sleeve (9) and the connecting sleeve (10) are fixedly connected to the opposite side of the front flange (3) and the rear flange (4), respectively. The end of the sleeve (9) away from the front flange (3) is sleeved on the outer surface of the connecting sleeve (10).

3. The burner vent flexible connection structure according to claim 2, characterized in that: The sleeve (9) is provided with a limiting mechanism inside to limit the movement direction of the sleeve (9) and the connecting cylinder (10).

4. The burner vent flexible connection structure according to claim 3, characterized in that: The limiting mechanism includes a guide groove (11) and a guide block (12). The guide groove (11) is opened on the inner wall of the sleeve (9). The guide block (12) is fixedly connected to the upper and lower surfaces of the connecting cylinder (10). The guide block (12) and the guide groove (11) are slidably connected.

5. The burner vent flexible connection structure according to any one of claims 1-4, characterized in that: A sealing gasket (13) is fixedly connected to the side of the front flange (3) near the air inlet (1) and the side of the rear flange (4) near the air outlet (2). The sealing gasket (13) is used to seal the gap between the front flange (3) and the air inlet (1) and the rear flange (4) and the air outlet (2).

6. The burner vent flexible connection structure according to claim 5, characterized in that: The outer surface of the guide rod (7) is provided with a clamping mechanism located between the front flange (3) and the rear flange (4) to push the front flange (3) and the rear flange (4) to move to both ends.

7. The burner vent flexible connection structure according to claim 6, characterized in that: The clamping mechanism includes a housing (14), a compression spring (15), and a stop (16). The stop (16) is fixedly connected to the outer surface of the guide rod (7). The housing (14) is sleeved on the outer surface of the stop (16) and is slidably connected to the stop (16). One end of the housing (14) away from the stop (16) is attached to one side of the connecting seat (6). One end of the compression spring (15) is fixedly connected to the inside of the housing (14), and the other end is attached to the stop (16) to push the housing (14) to move to one side.

8. The burner vent flexible connection structure according to claim 7, characterized in that: A limiting block (17) is fixedly connected to the inner side of one end of the housing (14), and the limiting block (17) is used to prevent the housing (14) from coming off the stop (16).

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