Anti-shaking device for metallurgical furnace waste heat boiler

Abstract

The utility model discloses a kind of metallurgical furnace kiln waste heat boiler anti-shaking devices, it is related to metallurgical furnace kiln waste heat boiler water-cooled wall vibration guiding technical field, including guiding component comprising: guide block, fixedly connected in guide block's pin shaft;Guide block is used to connect waste heat boiler water-cooled wall guide beam;Limiting component includes: adjustable limit plate connected to guide block;Adjustable limit plate is used to connect fixed beam;Waist-shaped hole is provided on adjustable limit plate, pin shaft sleeve is located in the inside of waist-shaped hole, pin shaft is used to connect guide block and adjustable limit plate;Waste heat boiler water-cooled wall's shaking amplitude is passed to adjustable limit plate by guide block, pin shaft, the waist-shaped hole of adjustable limit plate limits the vibration amplitude of pin shaft in allowable range, to limit waste heat boiler water-cooled wall shaking control in allowable range;Adjustable limit plate has position and angle double-degree-of-freedom adjustment function, realizes accurate adjustment by adjusting screw and worm gear pair, adapt to on-site installation error and demand.

Description

Technical Field

[0001] This utility model relates to the field of vibration guidance technology for water-cooled walls of waste heat boilers in metallurgical furnaces and kilns, specifically to an anti-sway device for waste heat boilers in metallurgical furnaces and kilns. Background Technology

[0002] In waste heat boilers in metallurgical furnaces, high-temperature flue gas enters the furnace through the rising flue and then abruptly changes direction to enter the descending flue. The strong impact generated by this change in airflow direction directly affects the water-cooled walls, causing them to periodically sway at the junction. Actual measurements show that the amplitude can reach 30 mm. Over long-term operation, this "large-arc swaying" leads to alternating stress between the water-cooled wall tubes and the rigid supports, gradually causing fatigue cracks in the tube walls. This can ultimately lead to leaks or even tube ruptures, severely impacting boiler safety and continuous production. To address the issue of water-cooled wall tube cracking caused by prolonged large-arc swaying in waste heat boilers, which affects boiler safety, existing technologies often employ methods such as adding rigid tie rods or strengthening welds. However, rigid connections cannot absorb the thermal expansion and contraction displacement caused by boiler start-up, shutdown, and load changes, instead creating new stress concentration points at the weld root, leading to cracks within a short period. Other solutions attempt to install sliding supports or simple oblong-shaped hole limiting plates at the support locations; however, once the oblong-shaped hole angle is fixed, it cannot adapt to on-site installation errors and changes in displacement direction, thus requiring on-site measurement and fabrication of the oblong-shaped hole limiting plate, lacking good versatility. Therefore, there is an urgent need for an anti-sway device that can effectively limit the swaying amplitude of the water-cooled wall while facilitating on-site installation and subsequent maintenance. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the main purpose of this utility model is to provide an anti-sway device for waste heat boilers in metallurgical furnaces, so as to solve the problems mentioned above.

[0004] To achieve the above objectives, this utility model provides an anti-sway device for waste heat boilers in metallurgical furnaces, comprising: The guiding assembly includes: a guide block and a pin fixedly connected to the guide block; the guide block is used to connect the guide beam of the waste heat boiler water-cooled wall. The limiting assembly includes: an adjustable limiting plate connected to the guide block; the adjustable limiting plate is used to connect the fixed beam; the adjustable limiting plate is provided with an oblong hole, and a pin is sleeved inside the oblong hole, the pin being used to connect the guide block and the adjustable limiting plate; the radius of the oblong hole is the same as the radius of the pin, and the oblong hole and the pin are clearance-fitted; the swaying amplitude of the waste heat boiler water-cooled wall is transmitted to the adjustable limiting plate through the guide block and the pin, and the oblong hole limits the vibration amplitude of the pin, thereby limiting the swaying amplitude of the waste heat boiler water-cooled wall.

[0005] As a further improvement of this utility model, the adjustable limiting plate includes: a limiting frame, a first adjusting member rotatably disposed inside the limiting frame, a movable plate connected to the first adjusting member and slidably connected inside the limiting frame, a second adjusting member rotatably disposed inside the movable plate, and a rotating plate connected to the second adjusting member and rotatably disposed inside the movable plate; the rotating plate is provided with an oblong hole for connecting a pin; the first adjusting member converts its own axial rotation into translation of the movable plate relative to the limiting frame under the action of external force; the second adjusting member converts its own axial rotation into rotation of the rotating plate relative to the movable plate under the action of external force.

[0006] As a further improvement of this utility model, adjustable limiting plates are installed in pairs on the upper and lower sides of the guide plate respectively.

[0007] As a further improvement of this utility model, the first adjusting component includes an adjusting screw rotatably disposed inside the limiting frame, and the moving plate is provided with an internal thread, with the adjusting screw and the moving plate being threadedly connected.

[0008] As a further improvement of this utility model, a frame cover is fixedly provided on one side of the limiting frame, and the frame cover is used to limit the relative movement of the adjusting screw in the axial direction.

[0009] As a further improvement of this utility model, a first locking bolt is threaded to one end of the adjusting screw, and a first spring washer is fitted on the first locking bolt; one end of the first spring washer contacts the frame cover, and the other end contacts the first locking bolt; after the first locking bolt is tightened, it is used to fix the adjusting screw so that the adjusting screw cannot rotate relative to the limiting frame.

[0010] As a further improvement of this utility model, the second adjusting member includes a worm gear rotatably disposed inside the moving plate and a worm wheel fixedly disposed outside the rotating plate, with the worm wheel and worm gear meshing and transmitting power.

[0011] As a further improvement of this utility model, a second locking bolt is threaded to one end of the worm gear, and a second spring washer is fitted on the second locking bolt. One end of the second spring washer contacts the moving plate, and the other end contacts the second locking bolt. After the second locking bolt is tightened, it is used to fix the worm gear so that the worm gear cannot rotate relative to the moving plate.

[0012] As a further improvement of this utility model, the guide block is provided with a mounting hole, and a pin is sleeved in the mounting hole, with the pin interference fit into the mounting hole of the guide block.

[0013] The beneficial effects of this utility model are reflected in: By adding a guide plate, pin, and adjustable limiting plate between the guide beam and the fixed beam of the water-cooled wall, the shaking of the water-cooled wall caused by the impact of flue gas turning is effectively limited to the allowable range (actual measurement controlled the shaking of the waste heat boiler water-cooled wall from 30±5mm to 2±2mm), fundamentally eliminating the risk of fatigue cracks in the tube wall caused by repeated large-arc oscillations. At the same time, since the adjustable limiting plate has both linear displacement and angular rotation degrees of freedom, there is no need to perform high-precision measurement of the position of the fixed beam or the thermal expansion and contraction displacement of the water-cooled wall during on-site installation. Fine adjustment can be made by screws and worm gears before welding, which significantly reduces the construction difficulty and rework rate. The self-locking characteristics of the worm gear pair and the double spring washer locking structure work together to ensure that the adjustment results remain reliable in the high-temperature vibration environment of the boiler during long-term operation, avoiding the weld cracking problem caused by thermal stress concentration in traditional rigid supports. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an anti-sway device for a waste heat boiler in a metallurgical furnace according to the present invention. Figure 2 This is a schematic diagram of the overall structure of the limiting component of the anti-swaying device for a waste heat boiler in a metallurgical furnace according to the present invention. Figure 3 This is a schematic diagram of the internal structure of the limiting component of the anti-swaying device for a waste heat boiler in a metallurgical furnace according to the present invention. Figure 4 This is a schematic diagram of the overall structure of the guide assembly of the anti-sway device for a waste heat boiler in a metallurgical furnace according to this utility model.

[0015] Explanation of reference numerals in the attached figures: 1. Guide block; 101. Mounting hole; 2. Pin; 3. Adjustable limit plate; 301. Limit frame; 302. First adjusting component; 303. Moving plate; 304. Second adjusting component; 305. Rotating plate; 306. Waist-shaped hole; 307. Adjusting screw; 308. Frame cover; 309. First locking bolt; 3010. First spring washer; 3011. Worm gear; 3012. Worm wheel; 3013. Second locking bolt; 3014. Second spring washer. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In one embodiment, see Figure 1-4The present invention relates to an anti-sway device for a waste heat boiler in a metallurgical furnace, comprising: a guide assembly and a limiting assembly. The guiding assembly includes: a guide block 1 and a pin 2 fixedly connected to the guide block 1; the guide block 1 is used to connect the guide beam of the waste heat boiler water-cooled wall. The limiting component includes: an adjustable limiting plate 3 connected to the guide block 1; the adjustable limiting plate 3 is used to connect the fixed beam; the adjustable limiting plate 3 is provided with a waist-shaped hole 306, and a pin 2 is sleeved inside the waist-shaped hole 306, and the pin 2 is used to connect the guide block 1 and the adjustable limiting plate 3. The radius of the oblong hole 306 is the same as the radius of the pin 2, and the oblong hole 306 and the pin 2 are clearance fit; the swaying amplitude of the waste heat boiler water-cooled wall is transmitted to the adjustable limiting plate 3 through the guide block 1 and the pin 2, and the oblong hole 306 restricts the vibration amplitude of the pin 2, thereby limiting the swaying amplitude of the waste heat boiler water-cooled wall.

[0018] Preferably, the guide block 1 is fixedly connected to the guide beam of the waste heat boiler water-cooled wall by welding, and the adjustable limiting plate 3 is fixedly connected to the fixed beam by welding.

[0019] Furthermore, the adjustable limiting plate 3 includes: a limiting frame 301, a first adjusting member 302 rotatably disposed inside the limiting frame 301, a movable plate 303 connected to the first adjusting member 302 and slidably connected inside the limiting frame 301, a second adjusting member 304 rotatably disposed inside the movable plate 303, and a rotating plate 305 connected to the second adjusting member 304 and rotatably disposed inside the movable plate 303; the rotating plate 305 is provided with an oblong hole 306 for connecting the pin 2; the first adjusting member 302 is used to convert the axial rotation of the first adjusting member 302 itself into the translation of the movable plate 303 relative to the limiting frame 301; the second adjusting member 304 is used to convert the axial rotation of itself into the rotation of the rotating plate 305 relative to the movable plate 303.

[0020] Preferably, the movable plate 303 is provided with sliders on both sides, and the limiting frame 301 is provided with a sliding groove. The movable plate 303 and the limiting frame 301 are connected by the slider and the sliding groove.

[0021] In the above setup, firstly, the guide block 1 with the pin 2 is welded to the guide beam of the waste heat boiler water-cooled wall. Then, the oblong hole 306 on the rotating plate 305 is fitted onto the outside of the pin 2. Next, the first adjusting member 302 is rotated to adjust the position of the limiting frame 301. Then, the second adjusting member 304 is rotated to adjust the angle of the rotating plate 305. This makes the limiting frame 301 contact the fixed beam and the angle of the oblong hole 306 conforms to the vibration angle allowed by the pin 2. Finally, the limiting frame 301 is welded to the fixed beam.

[0022] Furthermore, three adjustable limit plates are installed in pairs on the upper and lower sides of the guide plate respectively.

[0023] Furthermore, the first adjusting member 302 includes an adjusting screw 307 rotatably disposed inside the limiting frame 301, and the moving plate 303 is provided with an internal thread, and the adjusting screw 307 and the moving plate 303 are threadedly connected.

[0024] Preferably, one end of the adjusting screw 307 is provided with an internal hexagon countersunk hole.

[0025] Furthermore, a frame cover 308 is fixedly provided on one side of the limiting frame 301, and the frame cover 308 is used to limit the relative axial movement of the adjusting screw 307.

[0026] Preferably, the frame cover 308 and the limiting frame 301 are fixedly connected by bolts.

[0027] Furthermore, one end of the adjusting screw 307 is threadedly connected to a first locking bolt 309, and a first spring washer 3010 is fitted on the first locking bolt 309; one end of the first spring washer 3010 contacts the frame cover 308, and the other end contacts the first locking bolt 309; after the first locking bolt 309 is tightened, it is used to fix the adjusting screw 307, so that the adjusting screw 307 cannot rotate relative to the limiting frame 301.

[0028] Preferably, the first locking bolt 309 is a cross-head bolt so as to be distinguished from the internal hex countersunk hole of the adjusting screw 307.

[0029] In the above setup, by using a hex wrench to rotate the adjusting screw 307, the limiting frame 301 is moved relative to the rotating plate 305 and the moving plate 303. After adjusting to the appropriate position, the hex wrench is kept fixed to the adjusting screw 307. A Phillips screwdriver is used to rotate the first locking bolt 309, so that the first locking bolt 309 presses the first spring washer 3010 and the frame cover 308, thereby preventing the adjusting screw 307 from rotating relative to the limiting frame 301.

[0030] Furthermore, the second adjusting member 304 includes a worm 3011 rotatably disposed inside the movable plate 303 and a worm wheel 3012 fixedly disposed outside the rotating plate 305, with the worm wheel 3012 and the worm 3011 meshing and transmitting power.

[0031] Preferably, a locking block is provided on the outer side of the rotating plate 305, and a locking groove is provided on the inner side of the worm gear 3012. The rotating plate 305 and the worm gear 3012 are connected by the locking block and the locking groove, and then fixed with adhesive.

[0032] Preferably, one end of the worm gear 3011 is provided with an internal hexagon countersunk hole.

[0033] Furthermore, a second locking bolt 3013 is threaded to one end of the worm gear 3011, and a second spring washer 3014 is fitted on the second locking bolt 3013. One end of the second spring washer 3014 contacts the moving plate 303, and the other end contacts the second locking bolt 3013. After the second locking bolt 3013 is tightened, it is used to fix the worm gear 3011, so that the worm gear 3011 cannot rotate relative to the moving plate 303.

[0034] Preferably, the second locking bolt 3013 uses a cross-hole bolt to distinguish it from the internal hexagon countersunk hole of the adjusting screw 307.

[0035] In the above setup, by using a hex wrench to rotate the worm gear 3011, the rotating plate 305 is driven to rotate relative to the moving plate 303, thereby adjusting the angle of the oblong hole 306. After adjusting to a suitable angle, the hex wrench is kept fixed to the worm gear 3011, and the second locking bolt 3013 is rotated using a Phillips screwdriver, so that the second locking bolt 3013 presses the second spring washer 3014 and the moving plate 303, thereby preventing the worm gear 3011 from rotating relative to the moving plate 303.

[0036] Preferably, the frame cover 308 and the limiting frame 301 are respectively provided with clearance holes, which are used to facilitate the adjustment of the worm gear 3011 and the second locking bolt 3013.

[0037] Furthermore, the guide block 1 is provided with a mounting hole 101, and a pin 2 is sleeved inside the mounting hole 101. The pin 2 is interference-fitted into the mounting hole 101 of the guide block 1.

[0038] In this embodiment, the device mechanically absorbs and limits the large arc-shaped sway of the water-cooled wall at the flue gas turning point to an allowable range, thereby preventing the tube wall from cracking due to fatigue. When the boiler is running and the flue gas impacts the water-cooled wall, the water-cooled wall, along with its guide beam, will cause the guide block 1 to sway. The pin 2 on the guide block 1 will then be displaced. The pin 2 passes through the oblong hole 306 on the adjustable limiting plate 3. The outline size of the oblong hole 306 precisely limits the swing amplitude of the pin 2 within a safe range. Since the position of the fixed beam and the displacement of the water-cooled wall due to thermal expansion and contraction cannot be fully predicted during on-site installation, the device is equipped with a two-step adjustment: First, the adjusting screw 307 drives the moving plate 303 to move back and forth within the limiting frame 301, so that the limiting frame 301 fits against the fixed beam, completing the coarse adjustment of the position; Second, the worm gear 3011 and worm wheel 3012 drive the rotating plate 305 to rotate, so that the angle of the oblong hole 306 is consistent with the actual movement trajectory of the pin 2, completing the fine adjustment of the angle. After the two adjustments are in place, the screw and worm gear 3011 are locked with locking bolts with spring washers to prevent loosening during operation. Finally, the limit frame 301 is welded to the fixed beam, and the entire device forms a connection with the water-cooled wall that limits the relative range of motion.

[0039] The installation process is as follows: First, press the pin 2 into the guide block 1, then weld the guide block 1 onto the water-cooled wall guide beam. Next, fit the oblong hole 306 of the rotating plate 305 onto the pin 2, and rotate the adjusting screw 307 and worm gear 3011 in sequence, observing the clearance of the pin 2 in the hole while adjusting, until the oblong hole 306 neither jams with the pin 2 nor restricts its maximum swing. After confirming that everything is correct, tighten the two locking bolts, and then weld the limit frame 301 to the fixed beam. At this point, the sway of the water-cooled wall is reliably limited within the design allowable value, and the boiler can operate safely for a long time.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for preventing swaying in a waste heat boiler for metallurgical furnaces, characterized in that, include: The guide assembly includes: a guide block (1) and a pin (2) fixedly connected to the guide block (1); the guide block (1) is used to connect the guide beam of the waste heat boiler water-cooled wall; The limiting component includes: an adjustable limiting plate (3) connected to the guide block (1); the adjustable limiting plate (3) is used to connect the fixed beam; the adjustable limiting plate (3) is provided with a waist-shaped hole (306), and the pin (2) is sleeved inside the waist-shaped hole (306), and the pin (2) is used to connect the guide block (1) and the adjustable limiting plate (3); the radius of the waist-shaped hole (306) is the same as the radius of the pin (2), and the waist-shaped hole (306) and the pin (2) are clearance-fitted; the swaying amplitude of the waste heat boiler water-cooled wall is transmitted to the adjustable limiting plate (3) through the guide block (1) and the pin (2), and the waist-shaped hole (306) limits the vibration amplitude of the pin (2), thereby limiting the swaying amplitude of the waste heat boiler water-cooled wall; The adjustable limiting plate (3) includes: a limiting frame (301), a first adjusting member (302) rotatably disposed inside the limiting frame (301), a movable plate (303) connected to the first adjusting member (302) and slidably connected inside the limiting frame (301), a second adjusting member (304) rotatably disposed inside the movable plate (303), and a rotating plate (305) connected to the second adjusting member (304) and rotatably disposed inside the movable plate (303); the rotating plate (305) is provided with a waist-shaped hole (306) for connecting the pin (2); the first adjusting member (302) converts its own axial rotation into the translation of the movable plate (303) relative to the limiting frame (301) under the action of external force; the second adjusting member (304) converts its own axial rotation into the rotation of the rotating plate (305) relative to the movable plate (303) under the action of external force.

2. The anti-sway device for a waste heat boiler in a metallurgical furnace according to claim 1, characterized in that: Adjustable limit plates (3) are installed in pairs on the upper and lower sides of the guide plate respectively.

3. The anti-sway device for a waste heat boiler in a metallurgical furnace according to claim 2, characterized in that: The first adjusting component (302) includes an adjusting screw (307) rotatably disposed inside the limiting frame (301), and the moving plate (303) is provided with an internal thread, and the adjusting screw (307) and the moving plate (303) are threadedly connected.

4. The anti-sway device for a waste heat boiler in a metallurgical furnace according to claim 3, characterized in that: A frame cover (308) is fixedly provided on one side of the limiting frame (301). The frame cover (308) is used to limit the relative axial movement of the adjusting screw (307).

5. The anti-sway device for a waste heat boiler in a metallurgical furnace according to claim 4, characterized in that: One end of the adjusting screw (307) is threadedly connected to a first locking bolt (309), and a first spring washer (3010) is fitted on the first locking bolt (309); one end of the first spring washer (3010) contacts the frame cover (308), and the other end contacts the first locking bolt (309); after the first locking bolt (309) is tightened, it is used to fix the adjusting screw (307) so that the adjusting screw (307) cannot rotate relative to the limiting frame (301).

6. The anti-sway device for a waste heat boiler in a metallurgical furnace according to claim 5, characterized in that: The second adjusting component (304) includes a worm (3011) rotatably disposed inside the movable plate (303) and a worm wheel (3012) fixedly disposed outside the rotating plate (305), with the worm wheel (3012) and the worm (3011) meshing and transmitting power.

7. The anti-sway device for a waste heat boiler in a metallurgical furnace according to claim 6, characterized in that: One end of the worm (3011) is threaded with a second locking bolt (3013), and a second spring washer (3014) is fitted on the second locking bolt (3013). One end of the second spring washer (3014) contacts the moving plate (303), and the other end contacts the second locking bolt (3013). After the second locking bolt (3013) is tightened, it is used to fix the worm (3011) so that the worm (3011) cannot rotate relative to the moving plate (303).

8. The anti-sway device for a waste heat boiler in a metallurgical furnace according to claim 7, characterized in that: The guide block (1) is provided with a mounting hole (101), and the pin (2) is sleeved in the mounting hole (101). The pin (2) is interference-fitted in the mounting hole (101) of the guide block (1).

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