Novel bell-type furnace coil base bottom plate damage prevention device
By using a loss prevention device arranged with plates and dense circular hole matrix on the bottom plate of the cover furnace, the adhesion problem caused by foreign matter falls is solved, the safety and operating efficiency of the equipment are improved, and the service life is extended.
Patent Information
- Application Number
- CN202420098005.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-16
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-01-16
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of bell-type furnaces, in particular to a novel bell-type furnace platform bottom plate damage prevention device. Background Art
[0002] Hood furnace annealing is an important heat treatment process that most stainless steel products need to go through. This process can release the product's rolling stress, evenly refine the grain structure, effectively improve the product performance, and facilitate the processing and use of finished products. At present, the design of the base of the hood furnace in domestic steel mills mostly adopts the installation of a cross-shaped steel bar and a wire protection net above the impeller to protect against foreign objects falling. However, in actual production operation, it is seriously affected by the tower-shaped head of the incoming material, the middle stacking fault and other coil defects. After annealing, the bottom steel coil head or stacking fault part frequently adheres to the protective wire mesh, and the operator cannot remove it directly by hand, resulting in the wire protection net sticking and falling off before the bottom coil is taken out of the furnace. Tools must be used to forcibly remove it later. During the process of lifting out of the furnace, a huge safety hazard is formed, and the wire mesh cannot be reinstalled in time after it falls off. Only the steel bars of the well frame are left as a protective device on the furnace. During the production process, the strapping is broken, and foreign objects such as martensitic steel fragments are easily dropped into the impeller groove, causing the impeller to be damaged by foreign objects during high-speed operation, causing the dynamic balance of the furnace impeller to be unbalanced, the frequency of the furnace fan to be reduced, and even the furnace motor to be locked. Not only does it cause losses to the equipment, but the fault program also has a negative impact on product performance quality assurance and production efficiency. Utility Model Content
[0003] In order to overcome the defects in the above-mentioned related technologies, the utility model provides a new hood-type furnace table bottom plate anti-damage device, which can effectively increase the service life of the bottom plate without affecting the airflow circulation in the furnace, reduce the damage rate of the furnace table bottom plate protection net, better protect the impeller function accuracy, and prevent fan impeller damage and motor failure caused by falling foreign objects.
[0004] The utility model provides a novel hood-type furnace bottom plate anti-damage device, which is fixed in the tuyere or tuyere end of the hood-type furnace. The novel hood-type furnace bottom plate anti-damage device comprises: a plate and a plurality of vents. The shape of the plate is consistent with the shape of the tuyere of the furnace, and the plate is horizontally fixed in the tuyere of the furnace or in the tuyere end of the furnace. A plurality of vents are arranged on the plate, and the diameter of each vent is 150~800mm. The ventilation volume of the plurality of vents within 40 minutes is greater than the internal volume of the furnace body of the hood-type furnace.
[0005] Preferably, the diameters of the plurality of vents gradually increase from the edge to the center of the plate.
[0006] Preferably, the plurality of vents are arranged in a plurality of concentric circles on the plate. The diameter of the outermost vent among the plurality of vents is 150-170 mm; the diameter of the vent on the second concentric circle from the outside to the inside among the plurality of vents is 300-340 mm; the diameter of the vent on the third concentric circle from the outside to the inside among the plurality of vents is 460-500 mm; the diameter of the vent on the fourth concentric circle from the outside to the inside among the plurality of vents is 620-660 mm; the diameter of the vent on the fifth concentric circle from the outside to the inside among the plurality of vents is 730-800 mm.
[0007] Preferably, the ventilation openings located on the concentric circles in the center of the plurality of ventilation openings are connected in sequence.
[0008] Preferably, the ratio of the area of the plurality of vents to the area of other parts of the plate excluding the vents is greater than 53%.
[0009] Preferably, the plate material comprises 1Cr18Ni9Ti.
[0010] The beneficial effects of the utility model are:
[0011] The utility model adopts a plate material and arranges it in a dense circular hole matrix, which can ensure the ventilation efficiency in the hood-type furnace while avoiding the situation where the bottom steel coil head or the layered part sticks to the protective wire mesh and falls off, thereby protecting the impeller in the furnace platform. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0013] Figure 1 The installation position of the utility model in the bell-type furnace is shown in FIG.
[0014] Figure 2 It is a structural diagram of the utility model. DETAILED DESCRIPTION
[0015] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.
[0016] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0017] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.
[0018] like Figure 1 and Figure 2 As shown, a novel bell-type furnace bottom plate anti-damage device is fixed in the furnace tuyere 1 or at the end of the tuyere of the bell-type furnace. The novel bell-type furnace bottom plate anti-damage device comprises: a plate 2 and a plurality of vents 3. The shape of the plate 2 is consistent with the shape of the tuyere of the furnace, and the plate 2 is horizontally fixed in the tuyere of the furnace or at the end of the tuyere of the furnace. A plurality of vents 3 are arranged on the plate 2, and the diameter of each vent 3 is 150~800mm. The ventilation volume of the plurality of vents 3 within 40 minutes is greater than the internal volume of the furnace body of the bell-type furnace.
[0019] Preferably, the diameters of the plurality of vents 3 gradually increase from the edge to the center of the plate 2 .
[0020] Preferably, the plurality of vents 3 are arranged in a plurality of concentric circles on the plate 2. The diameter of the outermost vents 3 among the plurality of vents 3 is 150-170 mm; the diameter of the vents 3 on the second concentric circle from the outside to the inside among the plurality of vents 3 is 300-340 mm; the diameter of the vents 3 on the third concentric circle from the outside to the inside among the plurality of vents 3 is 460-500 mm; the diameter of the vents 3 on the fourth concentric circle from the outside to the inside among the plurality of vents 3 is 620-660 mm; the diameter of the vents 3 on the fifth concentric circle from the outside to the inside among the plurality of vents 3 is 730-800 mm.
[0021] Preferably, the ventilation openings 3 located on the concentric circles in the center among the plurality of ventilation openings 3 are connected in sequence.
[0022] Preferably, the ratio of the area of the plurality of ventilation openings 3 to the area of other parts of the plate 2 except the ventilation openings 3 is greater than 53%.
[0023] Preferably, the plate material 2 comprises 1Cr18Ni9Ti.
[0024] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.
[0025] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by technicians familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A novel bell-type furnace bottom plate damage prevention device, characterized in that: Fixed in the tuyere or tuyere end of the bell-type furnace, the novel bell-type furnace bottom plate damage prevention device comprises: A plate, the shape of the plate is consistent with the shape of the tuyere of the furnace, and the plate is horizontally fixed in the tuyere of the furnace or at the tuyere end of the furnace; A plurality of vents are arranged on the plate, and the diameter of each vent is 150-800 mm; Wherein, the ventilation volume of the multiple ventilation openings within 40 minutes is greater than the internal volume of the bell-type furnace body.
2. The novel bell-type furnace bottom plate damage prevention device according to claim 1 is characterized in that: The diameters of the plurality of vents gradually increase from the edge to the center of the plate.
3. The novel bell-type furnace bottom plate damage prevention device according to claim 2 is characterized in that: The plurality of vents are arranged in a plurality of concentric circles on the plate; The diameter of the outermost vent among the plurality of vents is 150-170 mm; The diameter of the ventilation opening on the second concentric circle from the outside to the inside among the plurality of ventilation openings is 300-340 mm; The diameter of the ventilation opening on the third concentric circle from the outside to the inside among the plurality of ventilation openings is 460-500 mm; The diameter of the ventilation opening on the fourth concentric circle from the outside to the inside of the plurality of ventilation openings is 620-660 mm; The diameter of the ventilation openings on the fifth concentric circle from the outside to the inside among the multiple ventilation openings is 730-800 mm.
4. The novel bell-type furnace bottom plate damage prevention device according to claim 3 is characterized in that: The ventilation openings on the concentric circles located at the center of the plurality of ventilation openings are connected in sequence.
5. The novel bell-type furnace bottom plate damage prevention device according to claim 4 is characterized in that: The ratio of the area of the plurality of ventilation openings to the area of other parts of the plate excluding the ventilation openings is greater than 53%.
6. The novel bell-type furnace bottom plate damage prevention device according to claim 5 is characterized in that: The plate material includes 1Cr18Ni9Ti.