A new type of rapping device suitable for membrane wall of waste heat boiler

Abstract

The utility model provides a novel rapping device suitable for waste heat boiler membrane type wall, it includes rapping drive mechanism, rapping transmission mechanism, rapping transmission mechanism includes force board, expansion joint, mounting plate, force guide, force board fixed mounting is in the rapping point of membrane type wall outside, force board outside fixedly connected mounting plate, the both sides of waste heat boiler shell are provided with first flange plate, second flange plate respectively, first flange plate is fixedly connected with second flange plate, expansion joint both ends are connected first flange plate, mounting plate respectively, second flange plate sets up in the protective housing, and the protective housing is fixed on the outer wall of waste heat boiler shell, and the outer side center of force guide inner end is fixedly connected with mounting plate, and the outer end horizontal sliding of force guide passes out protective housing, and rapping drive mechanism can intermittent type hammering force guide outer end. The utility model avoids the periodic stress and damage caused by the axial thermal expansion difference of waste heat boiler shell and membrane type wall to the device.

Description

Technical Field

[0001] This utility model relates to the field of rapping ash removal technology for waste heat boilers, and in particular to a novel rapping device suitable for membrane walls of waste heat boilers. Background Technology

[0002] During operation, fly ash in the flue gas easily adheres to the surface of the membrane wall of a waste heat boiler, forming an ash layer. This ash accumulation significantly reduces the boiler's thermal efficiency, affects its output, and can even cause corrosion and blockage of the heating surfaces, threatening the safe and stable operation of the boiler. Therefore, it is necessary to regularly remove the ash from the membrane wall.

[0003] Currently, common soot removal methods include sonic soot blowing, steam soot blowing, and mechanical rapping. Among these, mechanical rapping devices are widely used due to their simple structure, high energy, and direct soot removal effect. However, rapping devices typically need to penetrate the boiler shell, and their internal components are constantly situated within the narrow space formed by the boiler shell and the internal membrane wall. This space experiences high temperature and pressure, and during operation, there is an axial thermal expansion difference between the high-temperature internal membrane wall and the relatively cool external boiler shell. This expansion difference generates periodic thermal stress on the rapping device connected between the two, leading to problems such as jamming of the device's guide components, cracking of the connection structure, and overload damage to the drive mechanism.

[0004] Therefore, there is an urgent need for a rapping device that can effectively transmit rapping force, adapt to thermal expansion, and ensure good sealing. Utility Model Content

[0005] This utility model addresses the problems existing in the prior art by providing a novel rapping device suitable for membrane walls of waste heat boilers.

[0006] To achieve the above objectives, the present invention provides a novel rapping device suitable for membrane walls of waste heat boilers, comprising a rapping drive mechanism and a rapping transmission mechanism. The rapping transmission mechanism includes a force plate, an expansion joint, a mounting plate, and a guide rod. The force plate is fixedly installed at the rapping point on the outer side of the membrane wall, and the mounting plate is fixedly connected to the outer side of the force plate. A first flange and a second flange are respectively provided on the inner and outer sides of the waste heat boiler shell, and the first flange and the second flange are fixedly connected. The two ends of the expansion joint are respectively connected to the first flange and the mounting plate. The second flange is located inside a protective shell, which is fixed to the outer wall of the waste heat boiler shell. The inner end of the guide rod is fixedly connected to the center of the outer side of the mounting plate, and the outer end of the guide rod slides horizontally through the protective shell. The rapping drive mechanism is independently located outside the waste heat boiler shell or installed outside the protective shell, and the rapping drive mechanism can intermittently hammer the outer end of the guide rod.

[0007] Furthermore, the guide rod and the mounting plate are connected by a number of reinforcing ribs, which are evenly arranged in a circumferential array on the outside of the guide rod.

[0008] Furthermore, the vibration drive mechanism includes a bracket, a motor, a reducer, a drive sprocket, a driven sprocket, a vibration rod, and a vibration head. The bracket is independently set or installed outside the protective shell. The motor and reducer are both fixed on the bracket. The input shaft of the reducer is connected to the output shaft of the motor. The drive sprocket is installed on the output shaft of the reducer. The drive sprocket is connected to the driven sprocket via a chain. The central shaft of the driven sprocket is rotatably mounted on the bracket. An eccentric shaft is provided on the outer surface of the driven sprocket. The upper part of the vibration rod is rotatably mounted on the central shaft of the driven sprocket. A groove matching the eccentric shaft is also provided on the upper edge of the vibration rod. The vibration head is installed at the lower end of the vibration rod.

[0009] Furthermore, a limiting mechanism is also installed on the bracket. The limiting mechanism includes a limiting block, a clamping member, and an adjusting screw. The limiting block is located inside the U-shaped clamping member, and a screw is provided on the outer surface of the limiting block. The screw passes through a strip hole opened on the outer surface of the clamping member and is threadedly connected to the adjusting screw.

[0010] Furthermore, a heat insulation layer is provided on the inner side of the expansion joint.

[0011] Due to the adoption of the above technical solution, the beneficial technical effects of this utility model are as follows: By setting an expansion joint, this utility model not only prevents the rapping transmission mechanism from being directly in the high-temperature interlayer between the waste heat boiler shell and the membrane wall, but also absorbs the small radial displacement of the membrane wall itself relative to the shell, thereby avoiding the periodic stress and damage to the device caused by the difference in axial thermal expansion between the two. The rapping drive mechanism and the rapping transmission mechanism are in a natural environment connected to the atmosphere, enabling the device to work in a normal temperature environment. While ensuring the safe and stable execution of the rapping ash removal operation under the normal operating conditions of the waste heat boiler (high temperature and high pressure), it greatly improves the reliability and service life of the device. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of a novel vibrating device applicable to the membrane wall of a waste heat boiler according to this utility model. Reference numerals: 1- Waste heat boiler shell, 2- Membrane wall, 3- Stress plate, 4- Mounting plate, 5- Reinforcing rib, 6- Guide rod, 7- Expansion joint, 8- Insulation layer, 9- First flange, 10- Protective shell, 11- Second flange, 12- Bracket, 13- Motor, 14- Reducer, 15- Drive sprocket, 16- Driven sprocket, 1601- Eccentric shaft, 17- Vibrating rod, 18- Vibrating head, 19- Limiting block, 1901- Screw, 20- Clamping component, 2001- Strip hole, 21- Adjusting screw. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the following describes this utility model in further detail through preferred embodiments.

[0014] Please see the appendix Figure 1 As shown in the figure, this embodiment discloses a novel rapping device suitable for membrane walls of waste heat boilers, including a rapping drive mechanism and a rapping transmission mechanism. The rapping transmission mechanism includes a force plate 3, an expansion joint 7, a mounting plate 4, and a guide rod 6. The force plate 3 is fixedly installed at the rapping point on the outside of the membrane wall 2, and the mounting plate 4 is fixedly connected to the outside of the force plate 3. A first flange 9 and a second flange 11 are respectively provided on the inner and outer sides of the waste heat boiler shell 1. The first flange 9 and the second flange 11 are fixedly connected. The two ends of the expansion joint 7 are respectively connected to the first flange 9 and the mounting plate 4. The second flange 11 is set inside the protective shell 10, and the protective shell 10 is fixed to the outer wall of the waste heat boiler shell 1. The inner end of the guide rod 6 is fixedly connected to the center of the outer side of the mounting plate 4, and the outer end of the guide rod 6 slides horizontally through the protective shell 10. The rapping drive mechanism is independently set outside the waste heat boiler shell 1 or installed outside the protective shell 10. The rapping drive mechanism can intermittently hammer the outer end of the guide rod 6.

[0015] In this embodiment, the expansion joint 7 is a metal bellows structure, and the outer end of the guide rod 6 is exposed to the natural environment.

[0016] Specifically, the guide rod 6 is connected to the mounting plate 4 by a number of reinforcing ribs 5, which are evenly arranged in a circular array on the outside of the guide rod 6 to enhance structural stability.

[0017] Specifically, the vibration drive mechanism includes a bracket 12, a motor 13, a reducer 14, a drive sprocket 15, a driven sprocket 16, a vibration rod 17, and a vibration head 18. The bracket 12 is independently set or installed outside the protective shell 10. The motor 13 and the reducer 14 are both fixed on the bracket 12. The input shaft of the reducer 14 is connected to the output shaft of the motor 13. The drive sprocket 15 is installed on the output shaft of the reducer 14. The drive sprocket 15 is connected to the driven sprocket 16 via a chain. The central shaft of the driven sprocket 16 is rotatably mounted on the bracket 12. An eccentric shaft 1601 is provided on the outer surface of the driven sprocket 16. The upper part of the vibration rod 17 is rotatably mounted on the central shaft of the driven sprocket 16. A groove matching the eccentric shaft 1601 is also provided on the upper edge of the vibration rod 17. The vibration head 18 is installed at the lower end of the vibration rod 17.

[0018] In this embodiment, the vibration drive mechanism is completely in a natural environment, and the vibration head 18 is positioned directly opposite the outer end of the guide rod 6.

[0019] Specifically, a limiting mechanism is also installed on the bracket 12. The limiting mechanism includes a limiting block 19, a clamping member 20, and an adjusting screw 21. The limiting block 19 is located inside the U-shaped clamping member 20. A screw 1901 is provided on the outer surface of the limiting block 19. The screw 1901 passes through a strip hole 2001 opened on the outer surface of the clamping member 20 and is threadedly connected to the adjusting screw 21. By loosening the adjusting screw 21, the limiting block 19 can be moved up and down, thereby changing the extreme position of the clockwise swing of the vibrating rod 17 and realizing the adjustment of the vibration impact force.

[0020] Specifically, the expansion joint 7 is provided with a heat insulation layer 8 on its inner side, and the heat insulation layer 8 can be made of ceramic fiber blanket.

[0021] The working principle of this utility model is as follows: When cleaning, the motor 13 is started and rotates forward, the power input reducer 14, the drive sprocket 15 rotates clockwise, driving the driven sprocket 16 to rotate clockwise, the eccentric shaft 1601 rotates and enters the groove on the upper part of the vibrating rod 17, driving the vibrating rod 17 to swing to the left to a certain extent, then the motor 13 is controlled to reverse, the drive sprocket 15 rotates counterclockwise, driving the driven sprocket to rotate counterclockwise, the eccentric shaft 1601 rotates and slides out of the groove on the upper part of the vibrating rod 17, the vibrating rod 17 swings to the left under inertia to the limit position and collides with the limiting block 19, and under the reaction force and gravity, swings to the right until the vibrating head 18 violently hits the outer end of the guide rod 6, the impact force is transmitted through the guide rod 6, the mounting plate 4, and the force plate 3, and finally transmitted to the membrane wall 2 in the form of stress wave, causing it to vibrate at high frequency, thereby shaking off the accumulated dust on the surface.

[0022] The above description is a preferred embodiment of the present utility model, used to explain the technical solution of the present utility model. Those skilled in the art can also make conventional modifications, equivalent substitutions and improvements within the spirit and principles of the present utility model.

Claims

1. A novel rapping device suitable for membrane walls of waste heat boilers, comprising a rapping drive mechanism and a rapping transmission mechanism; characterized in that: The rapping transmission mechanism includes a force plate, an expansion joint, a mounting plate, and a guide rod. The force plate is fixedly installed at the rapping point on the outside of the membrane wall, and the mounting plate is fixedly connected to the outside of the force plate. A first flange and a second flange are respectively provided on the inner and outer sides of the waste heat boiler shell. The first flange and the second flange are fixedly connected. The two ends of the expansion joint are respectively connected to the first flange and the mounting plate. The second flange is set inside the protective shell, which is fixed to the outer wall of the waste heat boiler shell. The inner end of the guide rod is fixedly connected to the center of the outer side of the mounting plate, and the outer end of the guide rod slides horizontally through the protective shell. The rapping drive mechanism is independently set outside the waste heat boiler shell or installed outside the protective shell. The rapping drive mechanism can intermittently hammer the outer end of the guide rod.

2. A novel rapping device for membrane walls of waste heat boilers according to claim 1, characterized in that: The guide rod and the mounting plate are connected by several reinforcing ribs, which are evenly arranged in a circumferential array on the outside of the guide rod.

3. A novel rapping device for membrane walls of waste heat boilers according to claim 1, characterized in that: The vibration drive mechanism includes a bracket, a motor, a reducer, a drive sprocket, a driven sprocket, a vibration rod, and a vibration head. The bracket is independently set or installed outside the protective shell. The motor and reducer are both fixed on the bracket. The input shaft of the reducer is connected to the output shaft of the motor. The drive sprocket is installed on the output shaft of the reducer. The drive sprocket is connected to the driven sprocket via a chain. The central shaft of the driven sprocket is rotatably mounted on the bracket. An eccentric shaft is provided on the outer surface of the driven sprocket. The upper part of the vibration rod is rotatably mounted on the central shaft of the driven sprocket. A groove matching the eccentric shaft is also provided on the upper edge of the vibration rod. The vibration head is installed at the lower end of the vibration rod.

4. A novel rapping device for membrane walls of waste heat boilers according to claim 3, characterized in that: The bracket is also equipped with a limiting mechanism, which includes a limiting block, a clamping member, and an adjusting screw. The limiting block is located inside the U-shaped clamping member, and a screw is provided on the outer surface of the limiting block. The screw passes through a strip hole opened on the outer surface of the clamping member and is threadedly connected to the adjusting screw.

5. A novel rapping device for membrane walls of waste heat boilers according to claim 1, characterized in that: The expansion joint has a heat insulation layer on its inner side.

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