Vibration limiting device for nonferrous smelting waste heat boiler

Abstract

The utility model discloses a nonferrous metallurgy waste heat boiler vibration limiting device which is characterized in that the nonferrous metallurgy waste heat boiler vibration limiting device comprises a fixing plate, a compression spring and a threaded lead screw, the fixing plate is fixed on a steel stand column cross beam outside a boiler hearth, and a mounting through hole facing a boiler water wall rigid beam is formed in the fixing plate; the threaded lead screw is movably arranged in an installation through hole of the fixing plate in a penetrating mode, the two ends of the threaded lead screw extend out of the fixing plate respectively, a fixing nut and an adjusting nut are connected to the threaded lead screw in a threaded mode, and the adjusting nut and the fixing nut are located on the two sides of the fixing plate respectively. A spring positioning piece is fixed to the end, close to the boiler water-cooled wall rigid beam, of the threaded lead screw, the compression spring is located between the boiler water-cooled wall rigid beam and the threaded lead screw, one end of the compression spring is positioned on the spring positioning piece, and the other end of the compression spring abuts against the boiler water-cooled wall rigid beam. The device has the advantage that the operation safety of the boiler can be improved.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, specifically to a vibration limiting device for a waste heat boiler in non-ferrous metallurgy. Background Technology

[0002] After the waste heat boiler in non-ferrous smelting is put into operation, on the one hand, the boiler will undergo thermal expansion due to heating. After absorbing heat from a cold state, the boiler will become hot, causing a certain amount of displacement. On the other hand, under the action of the induced draft fan at the tail outlet, the flue gas pressure inside the furnace gradually increases from the furnace mouth to the furnace tail. The change in flue gas pressure load inside the furnace causes changes in flue gas velocity inside the furnace. The change in flue gas velocity inside the boiler results in uneven distribution of flue gas. The unevenly distributed high-speed flue gas causes the boiler to vibrate. The vibration generated by the boiler under long-term hot operation will affect the butt welds of the boiler water-cooled wall tubes, causing hazards such as tube rupture and water leakage, affecting the safe operation of the boiler. Utility Model Content

[0003] The purpose of this invention is to provide a vibration limiting device for waste heat boilers in non-ferrous metallurgy that can improve the safety of boiler operation.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a vibration limiting device for a waste heat boiler in non-ferrous smelting, comprising a fixed plate, a compression spring, and a threaded rod. The fixed plate is fixed to a steel column beam outside the boiler furnace. An installation through hole is provided on the fixed plate facing the rigid beam of the boiler water-cooled wall. The threaded rod is movably inserted through the installation through hole of the fixed plate, with both ends of the threaded rod extending out of the fixed plate. A fixing nut and an adjusting nut are threadedly connected to the threaded rod. The adjusting nut and the fixing nut are located on both sides of the fixed plate. A spring positioning component is fixed at the end of the threaded rod near the rigid beam of the boiler water-cooled wall. The compression spring is located between the rigid beam of the boiler water-cooled wall and the threaded rod, with one end of the compression spring positioned on the spring positioning component and the other end pressed against the rigid beam of the boiler water-cooled wall.

[0005] Furthermore, in the aforementioned vibration limiting device for a non-ferrous smelting waste heat boiler, the structure of the spring positioning component includes: a first spring sleeve, one end of which is open and the other end is closed by a first positioning base plate. The first spring sleeve is fixed to the end of the threaded screw by the first positioning base plate at its closed end. The open end of the first spring sleeve faces the rigid beam of the boiler water-cooled wall. The first spring sleeve and the first positioning base plate together constitute a first spring positioning groove for positioning the compression spring.

[0006] Furthermore, in the aforementioned vibration limiting device for a waste heat boiler in non-ferrous smelting, a second positioning base plate is fixed on the end face of the rigid beam of the boiler water-cooled wall near the spring positioning component, and a second spring sleeve is fixed on the second positioning base plate. One end of the second spring sleeve is open, and the other end is closed through the second positioning base plate. The open end of the second spring sleeve faces the first spring sleeve. The second spring sleeve and the second positioning base plate together constitute a second spring positioning groove for positioning the compression spring.

[0007] Furthermore, in the aforementioned vibration limiting device for a waste heat boiler in non-ferrous smelting, the second spring sleeve is inserted into the first spring sleeve, and the outer wall of the second spring sleeve slides in contact with the inner wall of the first spring sleeve.

[0008] Furthermore, in the aforementioned vibration limiting device for a non-ferrous smelting waste heat boiler, the cross-sectional shape of the through hole in the fixing plate is a U-shaped hole with the slot extending upwards to the top surface of the fixing plate.

[0009] Furthermore, in the aforementioned vibration limiting device for a non-ferrous smelting waste heat boiler, there is one adjusting nut and one fixing nut. The adjusting nut is located on the outside of the fixing plate away from the rigid beam of the boiler water-cooled wall, and the fixing nut is located on the inside of the fixing plate close to the rigid beam of the boiler water-cooled wall.

[0010] Through the implementation of the above technical solutions, the beneficial effects of this utility model are: (1) By setting a vibration limiting device between the rigid beam of the boiler water-cooled wall and the steel column crossbeam outside the boiler furnace, the vibration generated by the waste heat boiler during operation can be effectively reduced and limited, so that the boiler is in a reasonable and stable operating state. It can effectively avoid the impact of vibration on the welded joint of the boiler tubes, prevent the tearing of the membrane water-cooled wall, greatly improve the service life of the boiler membrane water-cooled wall tubes, and ensure the safe operation of the boiler. At the same time, it can also ensure that the displacement generated by the thermal expansion of the boiler is better absorbed, further improving the service life of the boiler and making the boiler more stable in production operation; (2) The structure is simple, and it is convenient and quick to use, install and repair on site, and is simple and efficient. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the vibration limiting device for a waste heat boiler in non-ferrous metallurgy, as described in this utility model.

[0012] Figure 2 This is a schematic diagram of the assembly of the rigid beam of the boiler water-cooled wall and the second spring sleeve 12.

[0013] Figure 3 This is an assembly diagram of the steel column beam, fixing plate, threaded rod, first spring sleeve, and first positioning base plate.

[0014] Figure 4 This is a structural diagram of the fixed plate.

[0015] Figure 5 This is a schematic diagram of the structure of the vibration limiting device for a non-ferrous smelting waste heat boiler as described in this utility model when it is installed in a non-ferrous smelting waste heat boiler. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0017] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a vibration limiting device 200 for a non-ferrous smelting waste heat boiler includes a fixed plate 1, a compression spring 2, and a threaded rod 3. The fixed plate 1 is fixed to the steel column beam 4 of the steel column 300 outside the furnace of the boiler 100. The fixed plate 1 has an installation through hole 111 facing the rigid beam 5 of the boiler water-cooled wall. The cross-sectional shape of the installation through hole 111 is a U-shaped hole with an upward-facing groove extending to the top surface 112 of the fixed plate. The threaded rod 3 is movably inserted into the installation through hole of the fixed plate 1, with both ends of the threaded rod 3 extending out of the fixed plate 1. A fixed... Nut 6 and adjusting nut 7 are respectively located on both sides of the fixing plate 1. In this embodiment, there is one adjusting nut 7 and one fixing nut 6. The adjusting nut 7 is located on the outer side of the fixing plate away from the rigid beam of the boiler water-cooled wall, and the fixing nut 6 is located on the inner side of the fixing plate close to the rigid beam of the boiler water-cooled wall. A spring positioning component is fixed at the end of the threaded rod 3 near the rigid beam of the boiler water-cooled wall 5. The compression spring 2 is located between the rigid beam of the boiler water-cooled wall 5 and the threaded rod 3. One end of the compression spring 2 is positioned on the spring positioning component, and the other end is pressed against the rigid beam of the boiler water-cooled wall 5.

[0018] In this embodiment, the structure of the spring positioning component includes: a first spring sleeve 9, one end of which is open and the other end is closed by a first positioning base plate 8. The first spring sleeve 9 is fixed to the end of the threaded screw 3 by the first positioning base plate 8 at its closed end. The open end of the first spring sleeve 9 faces the rigid beam 5 of the boiler water-cooled wall. The first spring sleeve 9 and the first positioning base plate 8 together form a first spring positioning groove 10 for positioning the compression spring 2. In this embodiment, a second positioning base plate 11 is fixed on the end face of the rigid beam 5 of the boiler water-cooled wall near the spring positioning component, and a second spring is fixed on the second positioning base plate 11. The second spring sleeve 12 has one open end and the other closed by the second positioning base plate 11. The open end of the second spring sleeve 12 faces the first spring sleeve 9. The second spring sleeve 12 and the second positioning base plate 11 together form the second spring positioning groove 13 for positioning the compression spring 2. In this embodiment, the second spring sleeve 12 is inserted into the first spring sleeve 9, and the outer wall of the second spring sleeve 12 slides in contact with the inner wall of the first spring sleeve 9. Through the cooperation of the first spring positioning sleeve 9 and the second spring positioning sleeve 12, the vibration generated by the waste heat boiler during operation can be further reduced and limited.

[0019] During boiler operation, the compression spring 2 between the rigid beam 5 of the boiler water-cooled wall and the steel column beam 4 located outside the boiler furnace reduces and limits the vibration generated by the waste heat boiler during operation, and absorbs the displacement caused by the thermal expansion of the boiler, making the boiler operate more stably.

[0020] In practical applications, the tension of the compression spring can be freely adjusted to freely adjust the force applied by the compression spring 2 to the rigid beam 5 of the boiler water-cooled wall. The specific operation method for tightening the compression spring 2 is as follows: With the adjusting nut 7 against the fixed plate 1, rotate the adjusting nut 7 to drive the threaded rod 3 to move relative to the fixed plate 1 and the adjusting nut 7 towards the rigid beam 5 of the boiler water-cooled wall. During the process of the threaded rod 3 moving towards the rigid beam 5 of the boiler water-cooled wall, the first spring sleeve 9 and the fixing bolt 6 will move towards the rigid beam 5 of the boiler water-cooled wall synchronously with the threaded rod 3. During the process of the first spring sleeve 9 moving towards the rigid beam 5 of the boiler water-cooled wall, the first spring sleeve 9 will gradually press the compression spring 2. After the threaded rod 3 moves into place, keep the adjusting nut 7 against the fixed plate 1, and reverse the fixing nut 6 to move the fixing nut 6 along the threaded rod 3 towards the fixed plate 1. The threaded rod 3 is positioned until the fixing nut 6 and adjusting nut 7 are clamped against the fixing plate 1 again, thus completing the pre-tightening of the compression spring 2. The specific operation for loosening the compression spring 2 is as follows: Rotate the fixing nut 6 to move it along the threaded rod 3 towards the rigid beam 5 of the boiler water-cooled wall. After it is in place, remove the external force applied to the fixing nut 6. At this time, under the elastic force of the compression spring 2, the threaded rod 3 and the first spring sleeve 9 will move towards the fixing plate 1. As the first spring sleeve 9 approaches the fixing plate 1, it will gradually loosen the compression spring 2 until the fixing nut 6 is tightened against the fixing plate 1 again. Then tighten the adjusting nut 7 onto the fixing plate 1 so that the adjusting nut 7 and the fixing nut 6 are clamped against the fixing plate 1 again, thus completing the positioning of the threaded rod 3 and the pre-loosening of the compression spring 2.

[0021] During installation, first screw the fixing nut 6 onto the threaded rod 3, and rotate the fixing nut 6 to move it closer to the first spring sleeve 9 along the threaded rod 3. Then, slide the threaded rod 3 downwards and embed it into the mounting through hole 111 of the fixing plate 1. Next, place the compression spring 2 between the first spring sleeve 9 and the second spring sleeve 12. Then, adjust the distance between the first spring sleeve 9 and the second spring sleeve 12 by moving the threaded rod 3, thereby adjusting the force applied by the compression spring 2 to the rigid beam 5 of the boiler water-cooled wall. After the threaded rod 3 has moved into place, rotate the fixing nut 6 in the opposite direction to move it along the threaded rod 3 until it is close to the fixing plate 1. Then, tighten the adjusting nut 7 onto the threaded rod 3 so that the adjusting nut 7 and the fixing nut 6 are clamped against the fixing plate 1 in a relative position, thus completing the installation. The installation process is simple and convenient.

[0022] During disassembly, simply rotate the fixing nut 6 to move it along the threaded rod 3 closer to the first spring sleeve 9. Then, move the threaded rod 3 away from the rigid beam 5 of the boiler water-cooled wall until the second spring sleeve 12 is disengaged from the first spring sleeve 9 and the compression spring can be easily removed. Then, remove the compression spring 2. Finally, move the threaded rod 3 together with the fixing nut 6 and the adjusting nut 7 upwards out of the mounting through hole 111 of the fixing plate 1 to complete the disassembly. The disassembly process is simple and convenient.

[0023] The advantages of this utility model are: (1) By setting a vibration limiting device between the rigid beam of the boiler water-cooled wall and the steel column crossbeam outside the boiler furnace, the vibration generated by the waste heat boiler during operation can be effectively reduced and limited, so that the boiler is in a reasonable and stable operating state. It can effectively avoid the impact of vibration on the welded joint of the boiler tubes, prevent the tearing of the membrane water-cooled wall, greatly improve the service life of the boiler membrane water-cooled wall tubes, and ensure the safe operation of the boiler. At the same time, it can also ensure that the displacement generated by the thermal expansion of the boiler is better absorbed, further improving the service life of the boiler and making the boiler more stable in production operation; (2) The structure is simple, and it is convenient and quick to use, install and maintain on site, and is simple and efficient.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any modifications or equivalent changes made based on the technical essence of the present utility model shall still fall within the scope of protection claimed by the present utility model.

Claims

1. A vibration limiting device for a waste heat boiler in non-ferrous metallurgy, characterized in that: The system includes a fixed plate, a compression spring, and a threaded rod. The fixed plate is fixed to a steel column beam outside the boiler furnace. The fixed plate has an installation through hole facing the rigid beam of the boiler water-cooled wall. The threaded rod is movably inserted through the installation through hole of the fixed plate, with both ends of the threaded rod extending out of the fixed plate. A fixing nut and an adjusting nut are threadedly connected to the threaded rod, located on opposite sides of the fixed plate. A spring positioning element is fixed to the end of the threaded rod near the rigid beam of the boiler water-cooled wall. The compression spring is located between the rigid beam of the boiler water-cooled wall and the threaded rod, with one end of the compression spring positioned on the spring positioning element and the other end pressed against the rigid beam of the boiler water-cooled wall.

2. The vibration limiting device for a waste heat boiler in non-ferrous smelting according to claim 1, characterized in that: The structure of the spring positioning component includes: a first spring sleeve, one end of which is open and the other end is closed by a first positioning base plate. The first spring sleeve is fixed to the end of the threaded screw by the first positioning base plate at its closed end. The open end of the first spring sleeve faces the rigid beam of the boiler water-cooled wall. The first spring sleeve and the first positioning base plate together form a first spring positioning groove for positioning the compression spring.

3. The vibration limiting device for a waste heat boiler in non-ferrous smelting according to claim 2, characterized in that: A second positioning base plate is fixed on the end face of the rigid beam of the boiler water-cooled wall near the spring positioning component. A second spring sleeve is fixed on the second positioning base plate. One end of the second spring sleeve is open and the other end is closed through the second positioning base plate. The open end of the second spring sleeve faces the first spring sleeve. The second spring sleeve and the second positioning base plate together form a second spring positioning groove for positioning the compression spring.

4. The vibration limiting device for a waste heat boiler in non-ferrous smelting according to claim 3, characterized in that: The second spring sleeve is inserted into the first spring sleeve, and the outer wall of the second spring sleeve slides in contact with the inner wall of the first spring sleeve.

5. The vibration limiting device for a waste heat boiler in non-ferrous smelting according to claim 1, characterized in that: The cross-sectional shape of the mounting hole on the fixing plate is a U-shaped hole with the groove extending upwards to the top surface of the fixing plate.

6. A vibration limiting device for a waste heat boiler in non-ferrous smelting according to any one of claims 1 to 5, characterized in that: There is one adjusting nut and one fixing nut. The adjusting nut is located on the outside of the fixing plate away from the rigid beam of the boiler water-cooled wall, and the fixing nut is located on the inside of the fixing plate close to the rigid beam of the boiler water-cooled wall.

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