Cooling annealing device for rolling plate forging
By designing components for pumping, filtration, cooling and heat recovery in the all-hydrogen-hood furnace annealing device, and combining residual oil collection and discharge devices, the residual oil splashing problem caused by grid fluctuations is solved, ensuring the quality and material yield of the cold-rolled plate.
Patent Information
- Application Number
- CN202421691180.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-17
AI Technical Summary
During the annealing of a full hydrogen hood furnace, the power grid fluctuations cause the residual oil in the furnace split pipe to be heated into liquid, and after the furnace is re-energized, it is sprayed onto the cold-rolled plate with cooling gas, causing black-brown oil spot defects, affecting the quality and material yield of the cold-rolled plate.
A cooling annealing device for forging is designed, including a full hydrogen-covered furnace body, a pumping assembly, a filtration assembly, a ventilation duct assembly, a waste heat recovery assembly and a residual oil collection assembly. Through the process of pumping, filtration, cooling and heat recovery, residual oil in the oven pipe is collected and discharged to prevent it from splashing onto the cold-rolled plate.
It effectively avoids residual oil splashing on the cold-rolled plate, prevents the occurrence of black-brown oil spot defects, thereby ensuring the quality and material yield of the cold-rolled plate.
Smart Images
Figure CN222907984U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of all-hydrogen bell-type furnaces, in particular to a cooling and annealing device for forging of tie plates. Background Art
[0002] In all-hydrogen bell-type furnace annealing, hydrogen is used as the heating and cooling medium to reduce iron oxide to pure iron at high temperature, and at the same time, the rolling oil on the surface after rolling is volatilized and discharged to achieve bright annealing with high-quality surface. Its cooling methods mainly include two types: water spraying cooling and shunt cooling. Among them, in the shunt cooling method, when the furnace gas temperature cools down to 400 °C, the shunt fan is started, and the gas in the furnace is pumped into the shunt cooling pipeline, cooled by a water-cooled heat exchanger and then sent back into the furnace to achieve rapid cooling. Because there is a large amount of emulsion on the surface of the cold-rolled sheet after rolling before annealing, the residual oil volume generated by the volatilization of the emulsion is relatively large during the annealing process, and part of it is deposited in the shunt pipeline. When accidents such as power failure of the bell-type furnace occur due to power grid fluctuations, the deposited residual oil in the shunt pipeline of the furnace platform with a relatively high temperature in the heating stage is heated into a liquid state. When the bell-type furnace comes back on power, during the nitrogen purging stage, the shunt fan starts, and the residual oil in the shunt pipeline is sprayed onto the cold-rolled sheet in the furnace together with the cooling gas, resulting in black-brown oil spot defects on the cold-rolled sheet, which seriously affects the quality and yield of the cold-rolled sheet. Therefore, a cooling and annealing device for forging of tie plates is provided now. Content of the Utility Model
[0003] Aiming at the deficiencies of the prior art, the utility model provides a cooling and annealing device for forging of tie plates. When accidents such as power failure of the bell-type furnace occur due to power grid fluctuations, the liquid formed by the heating of the deposited residual oil in the pipeline of the furnace platform with a relatively high temperature in the heating stage can be collected. When the bell-type furnace comes back on power, the residual oil can be discharged and then the bell-type furnace can be operated, and the situation that the residual oil is sprayed onto the cold-rolled sheet in the furnace together with the cooling gas, resulting in black-brown oil spot defects on the cold-rolled sheet, will not occur, thus ensuring the quality and yield of the cold-rolled sheet and overcoming the deficiencies of the prior art.
[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0005] A cooling and annealing device for forging of tie plates includes an all-hydrogen bell-type furnace body. An air extraction component is fixed on the top of the all-hydrogen bell-type furnace body. The air extraction component is connected with a filtering component. A ventilation pipeline component is installed between the filtering component and the bottom of the all-hydrogen bell-type furnace body. The ventilation pipeline component is connected with a waste heat recovery component and a residual oil collection component;
[0006] The residual oil collection component includes a U-shaped collection pipe. A connecting pipe is welded to the bottom of the U-shaped collection pipe. The bottom end of the connecting pipe is connected with a hollow ball, and the bottom of the hollow ball is connected with a sewage solenoid valve.
[0007] Through the above scheme, when there is an accident such as power failure of the bell-type furnace due to power grid fluctuation, the liquid formed by the deposited residual oil in the furnace platform pipeline with a higher temperature during the heating stage can be collected. When the bell-type furnace is powered on, the residual oil can be discharged and the bell-type furnace can be operated again. The residual oil will not be sprayed onto the cold-rolled plate in the furnace along with the cooling gas, causing the cold-rolled plate to have black-brown oil spots, thereby ensuring the quality and yield of the cold-rolled plate.
[0008] Preferably, the exhaust assembly comprises an exhaust fan installed on the top of the full hydrogen bell-type furnace body, the air outlet end of the exhaust fan is connected to a wind hood, and the bottom end of the wind hood is connected to an air outlet duct.
[0009] Preferably, the filter assembly comprises a filter box connected to the bottom end of the air outlet duct, a fixing frame is inserted in the middle of the filter box, and a filter screen is fixed on the inner side of the fixing frame.
[0010] Preferably, a sealing plate is installed at one end of the fixing frame located outside the filter box, and the four corners of the sealing plate are connected to the filter box by bolts.
[0011] Preferably, a sealing ring is provided on the side of the sealing plate facing the filter box.
[0012] Preferably, the ventilation duct assembly includes a first air duct connected to one side of the filter box and a second air duct connected to the bottom of the full hydrogen hood-type furnace body, and both ends of the U-shaped collecting pipe are respectively connected to the first air duct and the second air duct.
[0013] Preferably, the waste heat recovery component includes a water tank, the first air guide duct is U-shaped, and the vertical section of the first air guide duct is located inside the water tank, and a water inlet and a water outlet are respectively provided on the top and bottom of one side of the water tank.
[0014] The beneficial effects of the utility model are:
[0015] Through the coordinated use of the exhaust assembly, filter assembly, ventilation duct assembly, waste heat recovery assembly and residual oil collection assembly, the high-temperature gas in the furnace can be extracted, filtered and cooled down and then sent back to the furnace. When the power grid fluctuation causes the hood furnace to lose power and other accidents, the liquid formed by the deposited residual oil in the furnace table pipeline with a higher temperature during the heating stage can be collected. When the hood furnace is powered on, the residual oil can be discharged and the hood furnace can be operated again. The residual oil will not be sprayed onto the cold-rolled plate in the furnace along with the cooling gas, causing the cold-rolled plate to have black-brown oil spot defects, thereby ensuring the quality and yield of the cold-rolled plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the three-dimensional structure from a first perspective of a cooling annealing device for forging a bar plate proposed by the utility model.
[0017] Figure 2This is a second - perspective three - dimensional structural schematic diagram of a cooling and annealing device for tie - plate forging proposed by the present utility model.
[0018] Figure 3 This is a third - perspective three - dimensional structural schematic diagram of a cooling and annealing device for tie - plate forging proposed by the present utility model.
[0019] Figure 4 This is a Figure 1 magnified structural schematic diagram at position A in a cooling and annealing device for tie - plate forging proposed by the present utility model.
[0020] In the figure: 1. Whole - hydrogen bell - type furnace body; 2. Exhaust fan; 3. Wind hood; 4. Air outlet pipe; 5. Filter box; 6. Water inlet; 7. Water tank; 8. Water outlet; 9. Hollow ball; 10. U - shaped collecting pipe; 11. Second air - guiding pipe; 12. Sealing plate; 13. Connecting pipe; 14. Drainage solenoid valve; 15. First air - guiding pipe; 16. Fixed frame; 17. Filter screen. Specific implementation mode
[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.
[0022] Example 1, referring to Figures 1-4 , a cooling and annealing device for tie - plate forging, including a whole - hydrogen bell - type furnace body 1. An exhaust assembly is fixed at the top of the whole - hydrogen bell - type furnace body 1. The exhaust assembly is connected with a filtering assembly. A ventilation pipeline assembly is installed between the filtering assembly and the bottom of the whole - hydrogen bell - type furnace body 1. The ventilation pipeline assembly is connected with a waste - heat recovery assembly and an oil residue collection assembly;
[0023] The oil residue collection assembly includes a U - shaped collecting pipe 10. A connecting pipe 13 is welded to the bottom of the U - shaped collecting pipe 10. The bottom end of the connecting pipe 13 is connected with a hollow ball 9. The bottom of the hollow ball 9 is connected with a drainage solenoid valve 14;
[0024] The exhaust assembly includes an exhaust fan 2 installed at the top of the whole - hydrogen bell - type furnace body 1. The air outlet end of the exhaust fan 2 is connected with a wind hood 3. The bottom end of the wind hood 3 is connected with an air outlet pipe 4;
[0025] The filtering assembly includes a filter box 5 connected to the bottom end of the air outlet pipe 4. A fixed frame 16 is inserted in the middle of the filter box 5. A filter screen 17 is fixed inside the fixed frame 16. One end of the fixed frame 16 located outside the filter box 5 is installed with a sealing plate 12. The four corners of the sealing plate 12 are connected to the filter box 5 by bolts. A sealing ring is arranged on the side of the sealing plate 12 facing the filter box 5;
[0026] The ventilation duct assembly includes a first air duct 15 connected to one side of the filter box 5 and a second air duct 11 connected to the bottom of the full hydrogen bell-type furnace body 1, and both ends of the U-shaped collecting pipe 10 are respectively connected to the first air duct 15 and the second air duct 11;
[0027] The waste heat recovery component includes a water tank 7. The first air guide duct 15 is U-shaped, and the vertical section of the first air guide duct 15 is located inside the water tank 7. A water inlet 6 and a water outlet 8 are respectively provided at the top and bottom of one side of the water tank 7.
[0028] Working principle: The exhaust fan 2 extracts the gas in the furnace into the filter box 5. The gas is first filtered by the filter 17 to collect the dust in the furnace. Then the gas enters the first air duct 15. The heat of the gas is transferred to the water in the water tank 7 through the first air duct 15 to realize the recovery of heat energy. The cooled gas returns to the furnace along the U-shaped collection pipe 10 and the second air duct 11. When there is a power outage in the bell-type furnace due to power fluctuations, the residual oil deposited in the furnace pipe with a higher temperature during the heating stage is heated to a liquid state, and the liquid residual oil is The oil flows into the U-shaped collecting pipe 10, and then flows along the connecting pipe 13 to the hollow ball 9 to be collected. When the hood furnace is powered on, the drain solenoid valve 14 is first opened to discharge the deposited residual oil, and then the drain solenoid valve 14 is closed. In the subsequent operation of the hood furnace, the residual oil will not be sprayed onto the cold-rolled plate in the furnace along with the cooling gas, causing the cold-rolled plate to produce black-brown oil spots, thereby ensuring the quality and yield of the cold-rolled plate; regularly remove the sealing plate 12, take out the fixing frame 16, clean the filter screen 17 and continue to use it.
[0029] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.
Claims
1. A cooling annealing device for forging a sheet metal, comprising a full hydrogen bell-type furnace body (1), characterized in that: A gas extraction component is fixed on the top of the full hydrogen bell-type furnace body (1), the gas extraction component is connected to a filter component, a ventilation duct component is installed between the filter component and the bottom of the full hydrogen bell-type furnace body (1), and the ventilation duct component is connected to a waste heat recovery component and a residual oil collection component; The residual oil collection assembly comprises a U-shaped collection pipe (10), a connecting pipe (13) is welded to the bottom of the U-shaped collection pipe (10), a hollow ball (9) is connected to the bottom end of the connecting pipe (13), and a sewage discharge solenoid valve (14) is connected to the bottom of the hollow ball (9).
2. A cooling annealing device for forging a sheet metal according to claim 1, characterized in that: The exhaust assembly comprises an exhaust fan (2) installed on the top of the full hydrogen bell-type furnace body (1); the air outlet end of the exhaust fan (2) is connected to a wind hood (3); and the bottom end of the wind hood (3) is connected to an air outlet duct (4).
3. A cooling annealing device for forging a sheet metal according to claim 2, characterized in that: The filter assembly comprises a filter box (5) connected to the bottom end of the air outlet duct (4), a fixing frame (16) is inserted into the middle of the filter box (5), and a filter screen (17) is fixed on the inner side of the fixing frame (16).
4. A cooling annealing device for forging a bar plate according to claim 3, characterized in that: A sealing plate (12) is installed at one end of the fixing frame (16) located outside the filter box (5); the four corners of the sealing plate (12) are connected to the filter box (5) by bolts.
5. A cooling annealing device for forging a bar plate according to claim 4, characterized in that: A sealing ring is provided on the side of the sealing plate (12) facing the filter box (5).
6. A cooling annealing device for forging a bar plate according to claim 3, characterized in that: The ventilation duct assembly comprises a first air guide duct (15) connected to one side of the filter box (5) and a second air guide duct (11) connected to the bottom of the full hydrogen bell-type furnace body (1), and both ends of the U-shaped collecting pipe (10) are respectively connected to the first air guide duct (15) and the second air guide duct (11).
7. A cooling annealing device for forging a bar plate according to claim 6, characterized in that: The waste heat recovery component comprises a water tank (7), the first air guide duct (15) is U-shaped, and the vertical section of the first air guide duct (15) is located inside the water tank (7), and a water inlet (6) and a water outlet (8) are respectively provided at the top and bottom of one side of the water tank (7).