Novel waste heat furnace high-temperature heating surface tube panel fixing device
By adopting a new fixing device on the high-temperature heating surface module of the waste heat furnace, the design of light pipes and bent vertical plates, combined with the secondary reinforcement of U-bolts and nuts, the frequent bursting of pipes and difficult to replace due to bumping and grinding of the pipes is solved. Problem, improving service life and construction efficiency.
Patent Information
- Application Number
- CN202420152989.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-22
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-01-22
AI Technical Summary
The fixed structure of the existing waste heat furnace high-temperature heating surface module frequently explodes the pipe due to bumping and grinding, and it is difficult to replace the damaged pipe screen and fixed structure, which increases the maintenance cost and difficulty.
A new fixing device is adopted, in which a 120mm long light tube is installed on the spiral fin tube, the comb plate is directly stuck on the light tube, and is connected to the vertical plate through a square hole. The two ends of the vertical plate are curved structures and are equipped with U-shaped bolts. Reinforced with the nut to reduce vibration and wear of the tube.
It effectively reduces the wear level of the pipe, improves the service life, reduces the construction difficulty and cost, shortens the maintenance cycle, and improves the tightness of the fixture.
Smart Images
Figure CN222210285U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a novel high-temperature heating surface tube panel fixing device for a waste heat furnace. Background Art
[0002] First, taking the high-temperature heating surface module of Anshan Iron and Steel Co., Ltd. as an example, in the previous high-temperature heating surface module of the waste heat furnace, the fixed structure of the tube screen is composed of a comb plate and a vertical plate. There is a tiny gap between the spiral fin tube and the comb plate. The high-temperature heating surface tube screen of the waste heat furnace is directly subjected to the strong erosion of the flue gas of the combustion engine. The tube screen will continue to vibrate during operation. The comb plate in the fixed position and the spiral fin tube will rub against each other continuously. After long-term operation, the spiral fins will be severely damaged and break off. The falling off of the fins will increase the gap between the spiral fin tube and the comb plate, and the vibration amplitude will increase, causing the tube itself to directly rub against the comb plate, be damaged, and eventually burst and leak.
[0003] Secondly, the high-temperature heating surface module has a total of 9 rows of tube panels. Due to the above situation, the first 2 rows of tube panels facing the flue gas are frequently damaged and leaked, and the high-temperature heating surface module is extremely compactly arranged. The fixing devices of the 9 rows of tube panels are welded front and back. If you want to check the damage of the rear row of tube panels, you can only cut the tube panels and destructively dismantle the fixing devices. If you replace the original fixing structure, it is impossible to connect the 9 rows of tube panels due to the fixing structure itself and the space limitations on site. If you want to restore to the original tube panel connection structure, you have to replace the entire high-temperature heating surface module. At the same time, you need to remove the external guard plate and connecting pipes that affect the module lifting, which greatly increases the replacement and maintenance costs. Summary of the invention
[0004] The purpose of the utility model is to provide a new type of high-temperature heating surface tube panel fixing device for a waste heat furnace, which solves the problems of frequent tube bursts caused by the high-temperature heating surface module fixing device rubbing against the tubes on the waste heat furnace and difficulty in replacing damaged tube panels and fixing structures, reduces the difficulty of maintenance and shortens the maintenance cycle, while achieving safe and stable operation of the unit.
[0005] The above purpose is achieved through the following technical solutions:
[0006] A novel device for fixing a high-temperature heating surface tube panel of a waste heat furnace, the novel device for fixing a high-temperature heating surface tube panel of a waste heat furnace, comprising: a spiral fin tube, characterized in that: the spiral fin tube is a light tube with a length of 120 mm, and a comb plate is directly clamped on the light tube with the fins removed, the comb plate is connected to a vertical plate, square holes with fixed spacing are opened on the plate surface of the vertical plate, the depth of the comb plate inserted into the square hole of the vertical plate is just half of the thickness of the vertical plate, and the remaining half of the gap is filled with molten welding metal and then ground to be flush with the surface of the vertical plate.
[0007] The novel high-temperature heating surface tube panel fixing device of the waste heat furnace has curved structures at both ends of the vertical plate, a group of circular holes are opened at the upper position of the vertical plate, and U-shaped bolts are inserted into the circular holes, and nuts are screwed into the U-shaped bolts to reinforce the spiral fin tubes for secondary reinforcement.
[0008] The novel high-temperature heating surface tube panel fixing device of the waste heat furnace has a vertical plate thickness of 8 mm, a square hole on the vertical plate with a length of 255 mm and a width of 110 mm.
[0009] Beneficial effects of the utility model:
[0010] 1. The secondary reinforcement structure of the new fixing device has a stronger fixing effect, which can greatly reduce the wear of the pipe and increase the service life of the pipe. In addition, all the welds on the construction site are oriented in the direction of the welding construction, which greatly reduces the disassembly and assembly area on the construction site and reduces the difficulty of construction.
[0011] 2. The utility model can effectively reduce the damage to the tube when the tube panel vibrates, increase the service life of the tube, and when the tube panel is damaged and bursts, only the damaged tube panel and the new fixing device need to be replaced, without replacing the entire module and disassembling the external guard plate and pipeline, which greatly reduces the manufacturing and installation costs, reduces the construction difficulty, shortens the product manufacturing and maintenance cycle, and at the same time improves the tightness of the fixing device and improves the technical competitiveness.
[0012] 3. The utility model removes the spiral fins from the tubes at the connection position of the comb plate, and the comb plate is directly clamped on the tube and welded to the vertical plate to form a primary fastening; the U-bolt passes through the light tube and the vertical plate and is assembled with the nut and then spot welded to form a secondary fastening. This structure can effectively prevent the damage of the tube caused by the vibration of the tube screen and increase the service life of the tube; at the same time, the site welds of the new fixing device are all facing the welding construction direction, which greatly reduces the disassembly and assembly area on the site and reduces the construction difficulty. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Attached Figure 1 It is a structural schematic diagram of the utility model.
[0014] Attached Figure 2 Yes Figure 1 Schematic diagram of the A-direction structure.
[0015] Attached Figure 3 It is a structural diagram of the vertical plate.
[0016] Attached Figure 4 It is a top view of the vertical plate.
[0017] In the figure: 1. spiral fin tube, 2. light tube, 3. comb plate, 4. vertical plate, 5. square hole, 6. round hole, 7. U-bolt, 8. nut. DETAILED DESCRIPTION Example
[0018] A novel device for fixing a high-temperature heating surface tube panel of a waste heat furnace comprises: a spiral fin tube 1, wherein the spiral fin tube has a light tube 2 with a length of 120 mm without fins, and a comb plate 3 is directly clamped on the light tube without fins, the comb plate is connected to a vertical plate 4, and square holes 5 with fixed spacing are opened on the plate surface of the vertical plate, the depth of the comb plate inserted into the square hole of the vertical plate is just half of the thickness of the vertical plate, and the remaining half of the gap is filled with molten metal and then ground to be flush with the surface of the vertical plate.
[0019] The novel high-temperature heating surface tube panel fixing device of the waste heat furnace has curved structures at both ends of the vertical plate, a group of circular holes 6 are opened at the upper position of the vertical plate, and U-shaped bolts 7 are inserted into the circular holes, and nuts 8 are screwed into the U-shaped bolts to reinforce the spiral fin tubes for secondary reinforcement.
[0020] The novel high-temperature heating surface tube panel fixing device of the waste heat furnace has a vertical plate thickness of 8 mm, a square hole on the vertical plate with a length of 255 mm and a width of 110 mm.
[0021] Installation method:
[0022] (1) About 120 mm of fins are removed from the spiral finned tube in a fixed position, and the comb plate of the new structure is directly clamped on the bare tube with the fins removed.
[0023] (2) The vertical plate is provided with square holes with fixed spacing, and the size of the holes completely matches the contact portion of the comb plate.
[0024] (3) The depth of the comb plate inserted into the vertical plate is just half of the thickness of the vertical plate. The remaining half of the gap is filled with molten metal and then ground to be flush with the surface of the vertical plate; the comb plate is inserted 4mm into the vertical plate and welded with a 4mm fillet weld to strengthen the connection between the comb plate and the vertical plate.
[0025] (4) A row of circular holes is opened at the top of the vertical plate, and the fixed pipes are reinforced for the second time using a structure with U-bolts and nuts.
[0026] (5) Place the next row of comb plates on the newly installed vertical plates and connect them to the vertical plates with their corner welds. Repeat the above steps and install them layer by layer from the back of the furnace to the front of the furnace.
Claims
1. A new type of waste heat furnace high temperature heating surface tube panel fixing device, which comprises: The spiral fin tube is characterized in that: the spiral fin tube is a light tube with a length of 120 mm, and the comb plate is directly stuck on the light tube without fins, the comb plate is connected to the vertical plate, and the plate surface of the vertical plate is provided with square holes with fixed spacing, the depth of the comb plate inserted into the square hole of the vertical plate is just half of the thickness of the vertical plate, and the remaining half of the gap is filled with molten metal and then ground to be flush with the surface of the vertical plate.
2. The novel high temperature heating surface tube panel fixing device of the waste heat furnace according to claim 1 is characterized in that: The two ends of the vertical plate are bent structures. A group of round holes are opened at the upper position of the vertical plate, and U-shaped bolts are inserted into the round holes. Nuts are screwed onto the U-shaped bolts to reinforce the spiral fin tubes for the second time.
3. The novel high temperature heating surface tube panel fixing device of the waste heat furnace according to claim 2 is characterized in that: The thickness of the vertical plate is 8 mm, and the length of the square hole on the vertical plate is 255 mm and the width is 110 mm.