Permanent magnet adsorption walking trolley for water-cooled wall of boiler

Abstract

The utility model relates to a boiler water-cooled wall permanent magnet adsorption walking trolley, which belongs to the technical field of cutting auxiliary equipment and particularly comprises a walking trolley body, the walking trolley body is used for being mounted on a boiler water-cooled wall tube, and a plurality of permanent magnets used for adsorbing the boiler water-cooled wall tube are mounted at the bottom of a frame of the walking trolley body. The utility model provides the permanent magnet adsorption walking trolley for the water-cooled wall of the boiler, which is simple in structure, reasonable in design and capable of carrying a cutting or welding machine and automatically walking on the water-cooled wall of the boiler.

Description

Technical Field

[0001] The utility model relates to a boiler water-cooled wall permanent magnetic adsorption walking trolley, belonging to the technical field of cutting auxiliary equipment. Background Art

[0002] At present, due to the influence of coal type changes and low-nitrogen combustion transformation, some boiler water-cooled wall tubes have large-scale serious corrosion. The water-cooled wall tubes are corroded and thinned. Water-cooled wall tube bursts and leaks may occur at any time, which seriously threatens the safe operation of the unit. In order to ensure the safe operation of the boiler, the corroded water-cooled wall tubes must be replaced every time they are inspected. The water-cooled walls of modern large-scale power station boilers are mostly membrane water-cooled walls. When replacing the water-cooled wall tubes, it is necessary to cut the membrane between the adjacent water-cooled walls to separate the adjacent water-cooled walls before removing the water-cooled wall tubes that need to be replaced. After the water-cooled wall tubes are replaced, the fins between the water-cooled wall tubes need to be welded and sealed. Therefore, the quality of fin cutting affects the quality and construction period of the later welding. At present, the cutting and welding of the tube row fins still use manual gas cutting, which has slow cutting speed, difficult to guarantee quality, and even causes quality problems such as cutting adjacent tubes. Due to poor cutting quality, the later welding needs to go through grinding, seaming, welding and other processes to complete, which requires a lot of personnel investment, takes a long time, and is difficult to guarantee quality. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the utility model provides a boiler water-cooled wall permanent magnetic adsorption walking trolley which has a simple structure, reasonable design, can carry a cutting or welding machine, and automatically walks on the boiler water-cooled wall.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is a boiler water-cooled wall permanent magnet adsorption walking trolley, including a walking trolley body, the walking trolley body is used to be installed on the boiler water-cooled wall tube, and a plurality of permanent magnets for adsorbing the boiler water-cooled wall tube are installed at the bottom of the frame of the walking trolley body; the walking trolley body includes a frame, walking wheels, a lifting main shaft, a lifting secondary shaft, and a right-angle swing shaft, the lifting main shaft and the two lifting secondary shafts are respectively rotatably installed on the frame, the two lifting secondary shafts are respectively located on both sides of the lifting main shaft, the lifting main shaft is connected to the output shaft of the lifting worm gear box, a lifting drive motor is installed on the input shaft of the lifting worm gear box, and hinged ear plates are respectively installed on the lifting secondary shaft and the lifting main shaft, and the hinged ears on the lifting secondary shaft and the lifting main shaft The plates are hingedly connected by a connecting plate, and a right-angle swing shaft is installed at one end of the lifting secondary shaft, and the right-angle swing shaft extends to the outside of the frame, and correspondingly, a first arc-shaped limiting hole is provided on the frame, the right-angle swing shaft is located in the first arc-shaped limiting hole, and a walking wheel is installed on the right-angle swing shaft, and a driving assembly is installed on the lifting main shaft, and two ends of the driving assembly respectively extend to the outside of the frame, and correspondingly, a second arc-shaped limiting hole is provided on the frame, and two ends of the driving assembly are located in the second arc-shaped limiting hole, one end of the driving assembly is connected with the right-angle swing shaft through a sprocket chain, and a swing beam is installed on the other end, and wheel axles are respectively installed at both ends of the swing beam, and walking wheels are installed on the wheel axles, and the driving assembly and the wheel axle are connected through a sprocket chain.

[0005] Preferably, the drive assembly includes a mounting sleeve, a spline sleeve, a first drive shaft, and a second drive shaft. The first drive shaft and the second drive shaft are respectively mounted in the mounting sleeves. The mounting sleeves are fixed to the lifting main shaft through a main swing arm. One end of the first drive shaft is connected to a traveling worm gear box. A traveling motor is mounted on the input shaft of the traveling worm gear box. A spline sleeve is mounted on the other end of the first drive shaft. One end of the second drive shaft is inserted in the spline sleeve through a spline, and the other end is mounted on the swing beam.

[0006] Preferably, the first arc-shaped limiting hole and the second arc-shaped limiting hole have the same shape and are both 1 / 2 arc.

[0007] Preferably, the S poles and N poles of the plurality of permanent magnets are arranged alternately and evenly at the bottom of the frame.

[0008] Compared with the prior art, the utility model has the following technical effects: the utility model has a simple structure and a reasonable design. It designs a non-contact permanent magnetic adsorption wall-climbing walking trolley that can automatically walk on the boiler water-cooled wall. The trolley can carry a cutting or welding device and can realize automatic cutting or welding of the water-cooled wall fins through a control system, thereby improving the work efficiency of boiler tube row replacement, ensuring construction safety and construction quality, and being able to meet the company's boiler inspection and maintenance business needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model.

[0010] Figure 2 It is a side view of the utility model.

[0011] Figure 3 It is a schematic diagram of the walking state of the utility model.

[0012] Figure 4 It is a schematic diagram of the arrangement structure of the permanent magnets in the utility model. DETAILED DESCRIPTION

[0013] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0014] like Figures 1 to 4As shown, the boiler water-cooled wall permanent magnet adsorption trolley comprises a trolley body 1, the trolley body 1 is used to be installed on the boiler water-cooled wall tube 2, and a plurality of permanent magnets 3 for adsorbing the boiler water-cooled wall tube are installed at the bottom of the frame of the trolley body 1; the trolley body 1 comprises a frame 4, a walking wheel 5, a lifting main shaft 6, a lifting secondary shaft 7, and a right-angle swing shaft 8, the lifting main shaft 6 and two lifting secondary shafts 7 are rotatably installed on the frame 4, the two lifting secondary shafts 7 are respectively located on both sides of the lifting main shaft 6, the lifting main shaft 6 is connected to the output shaft of the lifting worm gear box 9, a lifting drive motor 10 is installed on the input shaft of the lifting worm gear box 9, and hinged ear plates 13 are respectively installed on the lifting secondary shaft 7 and the lifting main shaft 6, and the hinged ear plates on the lifting secondary shaft 7 and the lifting main shaft 6 are hinged by a connecting plate 14 A right-angle swing shaft 8 is installed at one end of the lifting secondary shaft 7, and the right-angle swing shaft 8 extends to the outside of the frame 4. Correspondingly, a first arc-shaped limiting hole 15 is provided on the frame 4, and the right-angle swing shaft 8 is located in the first arc-shaped limiting hole 15, and a walking wheel 5 is installed on the right-angle swing shaft 8. A driving component is installed on the lifting main shaft 6, and both ends of the driving component extend to the outside of the frame respectively. Correspondingly, a second arc-shaped limiting hole 16 is provided on the frame 4, and both ends of the driving component are located in the second arc-shaped limiting hole 16. One end of the driving component is connected to the right-angle swing shaft 8 through a sprocket chain, and a swing beam 17 is installed on the other end. Wheel axles 18 are respectively installed at both ends of the swing beam 17, and walking wheels 5 are installed on the wheel axle 18. The driving component and the wheel axle are connected through a sprocket chain.

[0015] The utility model adopts water-cooled wall tube 2 as the track for directional walking of walking trolley 1. Walking trolley 1 can move on water-cooled wall tube 2. Walking wheel 5 adopts V-groove wheel. Four V-shaped driving wheels of walking trolley 1 ride on the pipe and contact the pipe surface. At the same time, permanent magnet 3 installed at the bottom of trolley forms permanent magnetic circuit with pipe row to generate super strong adsorption force, and firmly adsorbs trolley to the wall surface of water-cooled wall pipe row. Permanent magnet 3 is adjusted by lifting mechanism to keep a small distance with pipe wall, and the distance is controlled at 3-5mm, so as to avoid contact between trolley adsorption device and pipe wall and affect trolley walking. S poles and N poles of multiple permanent magnets 3 are arranged alternately and evenly at the bottom of frame 4, so that magnetic field distribution is reasonable and adsorption effect is better.

[0016] The trolley controls the rotation of four walking wheels 5 through the driving assembly, so that the trolley can move on the water-cooled wall tube 2. Considering the distance between the trolley and the water-cooled wall tube, a multi-link mechanism is formed by the lifting main shaft 6, the lifting secondary shaft 7, and the right-angle swing shaft 8 to control the lifting of the entire mobile trolley. During operation, the lifting worm gear box 9 is controlled to rotate by the lifting drive motor 10, driving the lifting main shaft to rotate, and at the same time controlling the lifting secondary shaft to rotate, so that the driving assembly and the right-angle swing shaft 8 can slide in the second arc-shaped limit hole 16 and the first arc-shaped limit hole 15, thereby driving the walking wheels to move up and down, and controlling the distance between the entire trolley and the water-cooled wall tube. The first arc-shaped limit hole 15 and the second arc-shaped limit hole 16 have the same shape, and are both 1 / 2 arcs, and the adjustment space is large enough to meet the use requirements. A swing beam 17 is installed on the driving assembly, and the swing beam 17 can swing up and down with the water-cooled wall tube, so that the trolley can remain relatively stable when passing through uneven tube rows. The swing beam swings around the driving assembly to adapt to uneven tube rows, so that the trolley can maintain stable walking, and at the same time, the four walking wheels can adapt to tube rows with different pitches. In addition, by adjusting the lifting mechanism, the permanent magnet of the permanent magnetic adsorption device is kept at a small distance from the tube row wall, so that the trolley can travel smoothly and ensure sufficient adsorption force.

[0017] Among them, the driving assembly includes a mounting sleeve 19, a spline sleeve 20, a first driving shaft 21, and a second driving shaft 12. The first driving shaft 11 and the second driving shaft 22 are respectively installed in the mounting sleeve 19. The mounting sleeve 19 is fixed to the lifting spindle 6 through the main swing arm 23. One end of the first driving shaft 11 is connected to a traveling worm gear box 23. A traveling motor 24 is installed on the input shaft of the traveling worm gear box 23. The other end of the first driving shaft 11 is installed with a spline sleeve 20. One end of the second driving shaft 12 is inserted into the spline sleeve 20 through a spline, and the other end is installed on the swing beam 17. The driving assembly serves as the driving component of the entire walking trolley and also as an adjustment mechanism for the walking wheel spacing. Considering the different spacings of the water-cooled wall tubes, the walking trolley needs to move on the water-cooled wall tubes and match the spacing of the water-cooled wall tubes. The driving component adopts a telescopic structure, and the left and right spacing adjustment is achieved through a spline sleeve. Taking into account the needs of lifting, a swing beam is used to control the traveling wheel on one side. By pulling the swing beam, the traveling wheel on one side can slide left and right along the spline sleeve to achieve the adjustment of the traveling wheel spacing.

[0018] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. The boiler water-cooled wall permanent magnetic adsorption walking trolley includes a walking trolley body, which is characterized by: The walking trolley body is used to be installed on the boiler water-cooled wall tubes, and a plurality of permanent magnets for adsorbing the boiler water-cooled wall tubes are installed at the bottom of the frame of the walking trolley body; the walking trolley body includes a frame, walking wheels, a lifting main shaft, a lifting secondary shaft, and a right-angle swing shaft, the lifting main shaft and the two lifting secondary shafts are rotatably installed on the frame respectively, the two lifting secondary shafts are respectively located on both sides of the lifting main shaft, the lifting main shaft is connected to the output shaft of the lifting worm gear box, the input shaft of the lifting worm gear box is installed with a lifting drive motor, the lifting secondary shaft and the lifting main shaft are respectively installed with hinged ear plates, the lifting secondary shaft and the hinged ear plates on the lifting main shaft are hingedly connected through a connecting plate, and one end of the lifting secondary shaft is installed with a straight The right-angle swing shaft extends to the outside of the frame, and correspondingly, the frame is provided with a first arc-shaped limiting hole, the right-angle swing shaft is located in the first arc-shaped limiting hole, and a walking wheel is installed on the right-angle swing shaft, and a driving component is installed on the lifting main shaft, and the two ends of the driving component respectively extend to the outside of the frame, and correspondingly, the frame is provided with a second arc-shaped limiting hole, and the two ends of the driving component are located in the second arc-shaped limiting hole, one end of the driving component is connected with the right-angle swing shaft through a sprocket chain, and a swing beam is installed on the other end, and wheel axles are respectively installed at both ends of the swing beam, and walking wheels are installed on the wheel axles, and the driving component and the wheel axle are connected through a sprocket chain.

2. The boiler water wall permanent magnetic adsorption walking trolley according to claim 1 is characterized in that: The driving assembly includes a mounting sleeve, a spline sleeve, a first driving shaft, and a second driving shaft. The first driving shaft and the second driving shaft are respectively mounted in the mounting sleeves. The mounting sleeves are fixed to the lifting main shaft through a main swing arm. One end of the first driving shaft is connected to a traveling worm gear box. A traveling motor is mounted on the input shaft of the traveling worm gear box. A spline sleeve is mounted on the other end of the first driving shaft. One end of the second driving shaft is inserted in the spline sleeve through a spline, and the other end is mounted on the swing beam.

3. The boiler water wall permanent magnetic adsorption walking trolley according to claim 1 is characterized in that: The first arc-shaped limiting hole and the second arc-shaped limiting hole have the same shape and are both 1 / 2 arcs.

4. The boiler water wall permanent magnetic adsorption walking trolley according to claim 1 is characterized in that: The S poles and N poles of the plurality of permanent magnets are arranged alternately and evenly at the bottom of the frame.

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