Anti-backfire device for combustion chamber

Abstract

The utility model relates to the technical field of combustion chambers, and discloses an anti-backfire device used on a combustion chamber, which comprises a combustion chamber main body, one end of the combustion chamber main body is fixedly connected with an exhaust pipe, the outer wall of the exhaust pipe is fixedly connected with a motor, the output end of the motor is fixedly connected with a first gear, the inner wall of the exhaust pipe is provided with a circular groove, and the inner wall of the circular groove is provided with a second gear. The inner wall of the exhaust pipe is rotationally connected with a movable pipe, the outer wall of the movable pipe is fixedly connected with a second gear, and the outer wall of the second gear is connected with the outer wall of the first gear in an engaged mode. According to the utility model, the stop ball is stressed to slide out from the inner wall of the circular ring and is separated from the circular ring, so that gas passes through the circular ring and then is discharged through the movable pipe through the circular hole formed in the inner wall of the fixed block, thereby achieving the effect of preventing flame from burning out the combustion chamber during tempering, and further protecting the structural integrity of the combustion chamber; the service life of the combustion chamber is obviously prolonged, and the equipment replacement frequency and cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of combustion chambers, in particular to an anti-backfire device used in combustion chambers. Background Art

[0002] In traditional thermal power generation, the combustion chamber is the core component of the boiler. By burning fossil fuels such as coal, natural gas, and oil, chemical energy is converted into thermal energy, which heats water to produce high-temperature and high-pressure steam, driving the steam turbine to generate electricity. Combustion chamber flashback is a dangerous phenomenon, which refers to the reversal of the flame propagation direction in the combustion chamber and propagation toward the air inlet or fuel supply system.

[0003] In the prior art, anti-backfire mechanisms are usually not provided. The high-temperature flames generated by backfire may damage key components of the combustion equipment, such as the combustion chamber wall, valves, nozzles, etc. Long-term backfire may cause the performance of the equipment to decline and shorten the service life of the equipment. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides an anti-backfire device for a combustion chamber, aiming to improve the problem that the prior art usually does not have an anti-backfire mechanism, and long-term backfire may cause performance degradation of the equipment and shorten the service life of the equipment.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A backfire prevention device for a combustion chamber comprises a combustion chamber body, one end of the combustion chamber body is fixedly connected to an exhaust pipe, the outer wall of the exhaust pipe is fixedly connected to a motor, the output end of the motor is fixedly connected to gear one, the inner wall of the exhaust pipe is provided with a circular groove, the inner wall of the exhaust pipe is rotatably connected to a movable tube, the outer wall of the movable tube is fixedly connected to gear two, the outer wall of gear two is meshed with the outer wall of gear one, the outer wall of the movable tube is fixedly connected to a limiting ring, the outer wall of the limiting ring is rotatably connected to the inner wall of the circular groove, and the inner wall of the combustion chamber body is provided with an exhaust assembly.

[0007] Preferably, the exhaust assembly includes a circular ring, the outer wall of the circular ring is fixedly connected to the inner wall of the exhaust pipe, the inner wall of the circular ring is slidably connected to a blocking ball, the outer wall of the blocking ball is fixedly connected to one end of a spring, the other end of the spring is fixedly connected to a fixed block, the outer wall of the fixed block is fixedly connected to the inner wall of the exhaust pipe, and a circular hole is opened at one end of the fixed block.

[0008] Preferably, a fixing ring 1 is attached to the outer wall of the exhaust pipe, an anti-scalding cover 1 is fixedly connected to the outer wall of the fixing ring 1, and a clamping block 1 is fixedly connected to the outer wall of the fixing ring 1.

[0009] Preferably, a second fixing ring is attached to the outer wall of the exhaust pipe, a second anti-scalding cover is fixedly connected to the outer wall of the second fixing ring, and a rectangular groove is opened on the outer wall of the second fixing ring.

[0010] Preferably, a sliding column is slidably connected inside the second fixing ring, a limiting plate is fixedly connected to an outer wall of the sliding column, and a second clamping block is fixedly connected to one end of the sliding column.

[0011] Preferably, a second spring is slidably connected to the outer wall of the sliding column, one end of the second spring is fixedly connected to the outer wall of the second clamping block, and the other end of the second spring is fixedly connected to the inner wall of the rectangular groove.

[0012] Preferably, the outer wall of the second clamping block is fixedly connected to a fixing column, the outer wall of the fixing column is rotatably connected to a rotating wheel, and the outer wall of the rotating wheel is slidably connected to the inner wall of the rectangular groove.

[0013] Preferably, the outer wall of the first clamping block is slidably connected to the outer wall of the second clamping block.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, the blocking ball is forced to slide out from the inner wall of the ring and break away from the fitting state with the ring, so that the gas passes through the ring and then is discharged through the circular hole opened on the inner wall of the fixed block through the movable tube, thereby preventing the flame from burning the combustion chamber during backfire, thereby protecting the structural integrity of the combustion chamber, significantly extending the service life of the combustion chamber, and reducing the frequency and cost of equipment replacement.

[0016] 2. In the present invention, by starting the motor to rotate gear 1, gear 2 is driven to rotate, and then the movable tube drives the limit ring to rotate on the inner wall of the circular groove to achieve the effect of adjusting the direction of the pipe mouth of the movable tube, which can prevent sparks or afterflames generated during exhaust gas discharge from directly pointing at users, which is beneficial to ensuring production and personnel safety.

[0017] 3. In the present invention, the second clamping block is pushed back to reset by the second spring to limit the first clamping block, thereby achieving the effect of quickly installing the first and second anti-scalding covers, thereby reducing the risk of personnel contacting high-temperature areas, protecting the safety of workers, and reducing the occurrence of work-related accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional diagram of an anti-backfire device for a combustion chamber proposed by the present invention;

[0019] Figure 2 This is a cross-sectional view of an exhaust pipe of an anti-backfire device for a combustion chamber proposed by the present invention;

[0020] Figure 3A schematic diagram of a scalding cover for an anti-backfire device used on a combustion chamber proposed in the present invention;

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 This is a schematic diagram of a second clamping block of an anti-backfire device for a combustion chamber proposed by the present invention.

[0023] Legend:

[0024] 1. Combustion chamber body; 2. Exhaust pipe; 3. Motor; 4. Gear 1; 5. Movable tube; 6. Gear 2; 7. Circular groove; 8. Limiting ring; 9. Circular ring; 10. Block ball; 11. Spring 1; 12. Fixed block; 13. Circular hole; 14. Fixed ring 1; 15. Clamping block 1; 16. Anti-scalding cover 1; 17. Fixed ring 2; 18. Anti-scalding cover 2; 19. Rectangular groove; 20. Sliding column; 21. Limiting piece; 22. Clamping block 2; 23. Spring 2; 24. Fixed column; 25. Rotating wheel. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings of the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Reference Figure 1 - Figure 2 The utility model provides an embodiment: a backfire prevention device for a combustion chamber, comprising a combustion chamber body 1, one end of the combustion chamber body 1 is fixedly connected to an exhaust pipe 2, the outer wall of the exhaust pipe 2 is fixedly connected to a motor 3, the output end of the motor 3 is fixedly connected to a gear 1 4, the inner wall of the exhaust pipe 2 is provided with a circular groove 7, the inner wall of the exhaust pipe 2 is rotatably connected to a movable pipe 5, the outer wall of the movable pipe 5 is fixedly connected to a gear 2 6, the outer wall of the gear 2 6 is meshed with the outer wall of the gear 1 4, and the outer wall of the movable pipe 5 is fixed. A limit ring 8 is connected, the outer wall of the limit ring 8 is rotatably connected to the inner wall of the circular groove 7, and an exhaust assembly is provided on the inner wall of the combustion chamber body 1; the exhaust assembly includes a circular ring 9, the outer wall of the circular ring 9 is fixedly connected to the inner wall of the exhaust pipe 2, the inner wall of the circular ring 9 is slidably connected to a blocking ball 10, the outer wall of the blocking ball 10 is fixedly connected to one end of a spring 11, the other end of the spring 11 is fixedly connected to a fixing block 12, the outer wall of the fixing block 12 is fixedly connected to the inner wall of the exhaust pipe 2, and a circular hole 13 is opened at one end of the fixing block 12;

[0027] Specifically, the spring 11 can push and reset the baffle ball 10. During daily combustion, the internal pressure of the combustion chamber body 1 is stable. The spring 11 pushes the baffle ball 10 and the inner wall of the ring 9 to fit together to form a seal on the exhaust pipe 2, thereby ensuring the stability of combustion inside the combustion chamber body 1. The spring 11 can be fixed by the fixing block 12, and the circular hole 13 opened at one end of the fixing block 12 is used for gas to pass through.

[0028] Reference Figure 3 - Figure 5 The outer wall of the exhaust pipe 2 is fitted with a fixing ring 14, the outer wall of the fixing ring 14 is fixedly connected with a scalding cover 16, and the outer wall of the fixing ring 14 is fixedly connected with a clamping block 15;

[0029] Specifically, the anti-scalding cover 16 can fix the fixing ring 14.

[0030] Reference Figure 3 - Figure 5 The outer wall of the exhaust pipe 2 is fitted with a fixing ring 2 17, the outer wall of the fixing ring 2 17 is fixedly connected to a scald-proof cover 2 18, and the outer wall of the fixing ring 2 17 is provided with a rectangular groove 19; the interior of the fixing ring 2 17 is slidably connected to a sliding column 20, the outer wall of the sliding column 20 is fixedly connected to a limiting plate 21, and one end of the sliding column 20 is fixedly connected to a clamping block 22; the outer wall of the sliding column 20 is slidably connected to a spring 23, one end of the spring 23 is fixedly connected to the outer wall of the clamping block 22, and the other end of the spring 23 is fixedly connected to the inner wall of the rectangular groove 19; the outer wall of the clamping block 22 is fixedly connected to a fixing column 24, the outer wall of the fixing column 24 is rotatably connected to a rotating wheel 25, and the outer wall of the rotating wheel 25 is slidably connected to the inner wall of the rectangular groove 19; the outer wall of the clamping block 15 is slidably connected to the outer wall of the clamping block 22;

[0031] Specifically, one end of spring 23 is fixedly connected to the inner wall of the rectangular groove 19, and the other end is fixedly connected to the outer wall of block 22 to prevent block 22 from rotating and deviating. The limiting plate 21 can limit the sliding column 20 to prevent the sliding column 20 from sliding out of the inside of the rectangular groove 19. The outer wall of the fixed column 24 fixedly connected to the outer wall of the rotating wheel 25 is rotatably connected to the rotating wheel 25 to improve the smoothness of the movement of block 22. When block 22 moves, block 22 will drive the fixed column 24 to move, thereby causing the rotating wheel 25 to rotate on the inner wall of the rectangular groove 19.

[0032] Working principle: After backfire occurs inside the combustion chamber main body 1, the pressure inside the combustion chamber main body 1 will increase instantly. Under the impact of high-pressure gas, the blocking ball 10 is forced to slide out from the inner wall of the ring 9 and break away from the fitting state with the ring 9, and prompt the spring 11 to be forced to contract, so that the gas passes through the ring 9 and is discharged through the movable tube 5 through the circular hole 13 opened on the inner wall of the fixed block 12, thereby preventing the flame from burning the combustion chamber main body 1 during backfire, thereby protecting the structural integrity of the combustion chamber main body 1, significantly extending the service life of the combustion chamber main body 1, and reducing the frequency and cost of equipment replacement. When it is necessary to adjust the exhaust direction of the movable tube 5, it is only necessary to start the motor 3. The start of the motor 3 will prompt the gear 1 4 to rotate. The rotation of the gear 1 4 will drive the gear 2 6 to rotate, and then the movable tube 5 drives the limit ring 8 to rotate on the inner wall of the circular groove 7 to realize the direction of the pipe mouth of the movable tube 5, which can prevent the sparks or afterflames generated during exhaust gas discharge from directly pointing at the user, which is beneficial to ensuring production and personnel safety. When the scalding shield 16 and the scalding shield 2 18 need to be installed, the fixing ring 2 17 is first fitted with the outer wall of the exhaust pipe 2, and then the fixing ring 14 is driven to fit with the outer wall of the exhaust pipe 2 by the scalding shield 16. During the placement process, the outer wall of the clamping block 15 will slide on the outer wall of the clamping block 2 22. At this time, the clamping block 22 will be subjected to force, and the clamping block 22 will move under the force, thereby causing the sliding column 20 to slide on the inner wall of the fixing ring 2 17 and drive the limit plate 21 to move. At the same time, the spring 23 will also be subjected to force. The force contracts. When the block 15 slides to the end of the block 2 22, the block 2 22 will no longer be subjected to force, so that the spring 2 23 in the contracted state rebounds and resets to push the block 2 22 to reset and limit the block 15, thereby completing the rapid installation of the anti-scalding cover 1 16 and the anti-scalding cover 2 18, thereby achieving the effect of quickly installing the anti-scalding cover 1 16 and the anti-scalding cover 2 18, thereby reducing the risk of personnel contacting high-temperature areas, protecting the safety of personnel, and reducing the occurrence of work-related accidents.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A backfire prevention device for a combustion chamber, comprising a combustion chamber body (1), characterized in that: One end of the combustion chamber body (1) is fixedly connected to an exhaust pipe (2), the outer wall of the exhaust pipe (2) is fixedly connected to a motor (3), the output end of the motor (3) is fixedly connected to a gear 1 (4), the inner wall of the exhaust pipe (2) is provided with a circular groove (7), the inner wall of the exhaust pipe (2) is rotatably connected to a movable pipe (5), the outer wall of the movable pipe (5) is fixedly connected to a gear 2 (6), the outer wall of the gear 2 (6) is meshed with the outer wall of the gear 1 (4), the outer wall of the movable pipe (5) is fixedly connected to a limiting ring (8), the outer wall of the limiting ring (8) is rotatably connected to the inner wall of the circular groove (7), and the inner wall of the combustion chamber body (1) is provided with an exhaust assembly.

2. The anti-backfire device for a combustion chamber according to claim 1, characterized in that: The exhaust assembly includes a circular ring (9), the outer wall of the circular ring (9) is fixedly connected to the inner wall of the exhaust pipe (2), the inner wall of the circular ring (9) is slidably connected to a blocking ball (10), the outer wall of the blocking ball (10) is fixedly connected to one end of a spring (11), the other end of the spring (11) is fixedly connected to a fixing block (12), the outer wall of the fixing block (12) is fixedly connected to the inner wall of the exhaust pipe (2), and a circular hole (13) is opened at one end of the fixing block (12).

3. The anti-backfire device for a combustion chamber according to claim 1, characterized in that: The outer wall of the exhaust pipe (2) is fitted with a fixing ring (14), the outer wall of the fixing ring (14) is fixedly connected with an anti-scalding cover (16), and the outer wall of the fixing ring (14) is fixedly connected with a clamping block (15).

4. The anti-backfire device for a combustion chamber according to claim 1, characterized in that: The outer wall of the exhaust pipe (2) is fitted with a second fixing ring (17), the outer wall of the second fixing ring (17) is fixedly connected with a second scalding cover (18), and the outer wall of the second fixing ring (17) is provided with a rectangular groove (19).

5. The anti-backfire device for a combustion chamber according to claim 4, characterized in that: The interior of the second fixing ring (17) is slidably connected to a sliding column (20), the outer wall of the sliding column (20) is fixedly connected to a limiting plate (21), and one end of the sliding column (20) is fixedly connected to a second clamping block (22).

6. The anti-backfire device for a combustion chamber according to claim 5, characterized in that: The outer wall of the sliding column (20) is slidably connected to a spring 2 (23), one end of the spring 2 (23) is fixedly connected to the outer wall of the clamping block 2 (22), and the other end of the spring 2 (23) is fixedly connected to the inner wall of the rectangular groove (19).

7. The anti-backfire device for a combustion chamber according to claim 5, characterized in that: The outer wall of the second clamping block (22) is fixedly connected to a fixed column (24), the outer wall of the fixed column (24) is rotatably connected to a rotating wheel (25), and the outer wall of the rotating wheel (25) is slidably connected to the inner wall of the rectangular groove (19).

8. The anti-backfire device for a combustion chamber according to claim 3, characterized in that: The outer wall of the first clamping block (15) is slidably connected to the outer wall of the second clamping block (22).

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