Exhaust hood
By designing an exhaust hood that matches the inner stator and outer rotor, the problem of difficult capture of fumes escaping during the baking and demolding of tundishes was solved, achieving ultra-low emission environmental protection requirements and improving fume capture efficiency and production benefits.
Patent Information
- Application Number
- CN202520015398.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-01-03
AI Technical Summary
The fumes emitted during the baking and demolding of the intermediate bread are difficult to capture. Existing technologies cannot meet the environmental protection requirements for ultra-low emissions, and traditional methods suffer from problems such as equipment interference or poor capture effect.
Design a smoke hood that uses an inner stator and an outer rotor. An electric actuator controls the rotating shaft to drive the outer rotor and the inner stator, thereby achieving valve control and smoke collection. Combined with baffles and adjusting blades, the collection port and exhaust volume can be adjusted to achieve efficient smoke collection.
It achieves ultra-low emissions during the intermediate batch baking process, improves flue gas capture efficiency, reduces equipment maintenance time, and enhances environmental benefits.
Smart Images
Figure CN223916259U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of dust removal technology in steel enterprises, and specifically relates to a smoke exhaust hood. Background Technology
[0002] In general, steelmaking tundish baking lacks a flue gas collection device. The baking machine rotates to the top of the tundish to bake the cast tundish. After baking, the mold is lifted by an overhead crane, and a large amount of flue gas is generated around the tundish during demolding, dispersing into the plant and failing to meet the environmental quality requirements of the work area. To meet national ultra-low emission environmental protection requirements, it is imperative to treat the flue gas generated during tundish baking. However, due to the rotating position of the baking machine, equipment layout, and the overhead crane lifting the mold, a closed collection hood cannot be used to capture the flue gas. The flue gas from tundish baking is characterized by large instantaneous volume, high temperature, and strong thermal buoyancy. The flue gas escapes from the gaps around the tundish and mold, making it difficult to capture.
[0003] Currently, there are two main methods for capturing flue gas in China: one is to install a movable sealed hood; the other is to use side-suction vents for control. Method one affects the overhead crane mold; method two has a limited side exhaust range of the side-suction vents, resulting in poor capture of high-temperature hot flue gas. There are currently no engineering cases of effectively capturing flue gas during the baking and demolding process of intermediate tundish. Utility Model Content
[0004] The purpose of this invention is to provide a fume hood that solves the technical problem of difficulty in capturing the fumes escaping during the baking and demolding of intermediate tundishes in the prior art, and achieves the environmental protection requirement of ultra-low emissions during the baking of intermediate tundishes.
[0005] This utility model provides a smoke exhaust hood, comprising:
[0006] Electric actuators;
[0007] A rotating shaft, the first end of which is connected to the electric actuator;
[0008] An outer rotor, which is barrel-shaped, includes a base plate and an exhaust port opposite to the base plate. The barrel of the outer rotor has an opening, and the base plate is connected to the second end of the rotating shaft.
[0009] The inner stator is cylindrical and rotatably disposed inside the barrel of the outer rotor. The inner stator is provided with a collection port.
[0010] An exhaust pipe is provided, which is connected to the end of the outer rotor that has the exhaust port.
[0011] Furthermore, the smoke hood also includes:
[0012] A bearing support, the top of which is connected to the rotating shaft.
[0013] Furthermore, the opening radius of both the opening and the collection port is 90 degrees.
[0014] Furthermore, the smoke hood also includes:
[0015] A baffle plate, which is connected to the outer rotor.
[0016] Furthermore, the smoke hood also includes:
[0017] The exhaust port is equipped with adjustable blades.
[0018] Furthermore, the smoke hood also includes:
[0019] A control system, which is electrically connected to the electric actuator.
[0020] Furthermore, the smoke hood also includes:
[0021] A remote controller, which is electrically connected to the control system.
[0022] Furthermore, the smoke hood also includes:
[0023] The track is set on a platform around the tundish.
[0024] Furthermore, the smoke hood also includes:
[0025] A wheel assembly, wherein the wheel assembly is disposed at the bottom of the bearing support.
[0026] Furthermore, the smoke hood also includes:
[0027] The motor has one end connected to the wheel assembly and the other end electrically connected to the control system.
[0028] The present invention provides a fume hood that, through the structural design of the inner stator and the outer rotor, realizes the dual functions of valve control and fume collection, solves the problem of difficult collection of fume escaping during the demolding of tundish baking, achieves the environmental protection requirements of ultra-low emissions during tundish baking, and improves environmental benefits. Attached Figure Description
[0029] Figure 1 A schematic diagram of the structure of a smoke hood provided in an embodiment of this utility model;
[0030] Figure 2 for Figure 1 A cross-sectional view of the smoke hood shown;
[0031] Figure label:
[0032] 1-Electric actuator; 2-Rotating shaft; 3-Outer rotor; 4-Inner stator; 5-Opening; 6-Bearing bush; 7-Collection port; 8-Exhaust pipe; 9-Angle steel flange; 10-Bearing support; 11-Baffle plate. Detailed Implementation
[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0034] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity purposes and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.
[0035] Example 1
[0036] like Figure 1 , Figure 2 As shown in the figure, this application embodiment provides a fume hood, including an electric actuator 1, a rotating shaft 2, an outer rotor 3, and an inner stator 4. In this embodiment, the electric actuator 1 is an adjustable type, which can realize stepless adjustment. Pneumatic, electro-hydraulic, or adjustable actuators can also be used according to the process operation settings; no specific limitation is made here. The opening of the electric actuator 1 can be manually controlled or remotely controlled.
[0037] The first end of the rotating shaft 2 is connected to the electric actuator 1. When the electric actuator 1 is turned on, the electric actuator 1 drives the rotating shaft 2 and the outer rotor 3 to rotate.
[0038] The outer rotor 3 is barrel-shaped and arranged horizontally. The outer rotor 3 includes a bottom plate and an exhaust port arranged opposite to the bottom plate. The barrel of the outer rotor 3 is provided with an opening 5. The bottom plate is connected to the second end of the rotating shaft 2.
[0039] The inner stator 4 is cylindrical and horizontally arranged. It is rotatably mounted within the outer rotor 3. In this embodiment, a bearing 6 is used as the connecting element between the inner stator 4 and the outer rotor 3. Lubrication and sealing facilities are employed to reduce friction and air leakage between the inner stator 4 and the outer rotor 3. The inner stator 4 is provided with a collection port 7. The shape and number of collection ports 7 can be adjusted according to the length of the flue gas to improve the exhaust efficiency. In this embodiment, the opening curvature of both the opening 5 and the collection port 7 is 90 degrees.
[0040] Specifically, when using the fume hood provided in this application embodiment, the fume hood is initially in a closed state, and the baffle is in a vertical state. When the electric actuator 1 receives the fume exhaust signal, the electric actuator 1 drives the outer rotor 3 to rotate 90° clockwise through the rotating shaft 2. The opening 5 of the outer rotor 3 is aligned with the collection port 7 on the inner stator 4. At this time, the baffle is in a horizontal state, the fume hood is open, the tundish is in contact with the baking process, and when the mold is lifted, the gap between the mold and the tundish is ensured to be below the baffle. The baffle does not interfere with the mold and the crane. The smoke from the gap is introduced into the dust removal system through the fume hood for treatment. After all the smoke is collected, about 3 minutes later, when the electric actuator 1 receives the closing signal, the electric actuator 1 drives the outer rotor 3 to rotate 90° counterclockwise. The side wall of the outer rotor 3 closes the collection port 7 on the inner stator 4, and the crane moves the mold away. Finally, the operation of the fume hood is realized.
[0041] In some implementations, such as Figure 1 As shown, the smoke hood also includes an exhaust pipe 8. An angle steel flange 9 is provided at the exhaust port end of the outer rotor 3. The outer rotor 3 is connected to the exhaust pipe 8 through the angle steel flange 9. The exhaust pipe 8 can be a flexible pipe or a rigid pipe depending on the application scenario. The length is adjustable and no specific limitation is made here. The bottom of the angle steel flange 9 can be set with a support seat to adjust the installation position of the smoke hood according to the actual situation.
[0042] In some implementations, such as Figure 1 As shown, the smoke hood also includes a bearing support 10, the top of which is connected to the rotating shaft 2, and the height of the bearing support 10 is adjustable.
[0043] In some implementations, such as Figure 2 As shown, the smoke hood also includes a baffle plate 11, which is connected to the upper side of the opening 5 of the outer rotor 3. The length and shape of the baffle plate are determined according to the location of the collection port 7 and the distance from the smoke source. Straight plate type, downward curved type baffle plate, and L-shaped baffle plate can be used to effectively collect smoke and dust and improve the smoke exhaust effect.
[0044] In some embodiments, the opening 5 end of the outer rotor 3 is also provided with adjusting blades, which can realize the secondary adjustment function of the exhaust port by adding adjusting blades.
[0045] In some embodiments, the fume hood also includes a remote controller (not shown), a control system (not shown), a track (not shown), a wheel assembly (not shown), and a motor (not shown). The remote controller is electrically connected to the control system, and fume extraction commands can be controlled via the remote controller. The fume hood also includes a control system electrically connected to an electric actuator 1. The track is mounted on a platform surrounding the tundish. The wheel assembly is mounted at the bottom of the bearing support 10. One end of the motor is connected to the wheel assembly, and the other end is electrically connected to the control system.
[0046] Specifically, the exhaust hood is connected to the track via a wheel assembly. When exhaust operation is required, the exhaust switch is activated via remote control. The PLC control system controls the motor to drive the wheel assembly on the track, thereby causing the exhaust hood to exhaust smoke around the tundish. Simultaneously, the control system controls the electric actuator 1 to execute the start command, thereby causing the outer rotor 3 to rotate 90° clockwise. The opening 5 of the outer rotor 3 aligns with the collection port 7 on the inner stator 4. At this time, the baffle is in a horizontal state, the exhaust hood is open, and the flue gas overflowing from around the tundish is introduced into the dust removal system for treatment through the exhaust hood. After all the flue gas is collected, the exhaust switch is closed via remote control, the control system controls the motor to stop running, and the control system controls the electric actuator 1 to execute the close command. The electric actuator 1 drives the outer rotor 3 to rotate 90° counterclockwise, and the side wall of the outer rotor 3 closes the collection port 7 on the inner stator 4.
[0047] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:
[0048] 1. This application solves the problem that when the opening 5 is too large and rotated to the closed position, the baffle plate exceeds the range of the valve body, affecting the surrounding facilities or the passageway. It also solves the problem that the flue gas collection effect is not ideal when the opening 5 is too small.
[0049] 2. This application, by adopting a structural design of inner stator 4 and outer rotor 3, solves the problem that in previous similar valve structures, when there was a problem with the internal rotating parts and the external fixed parts, it was impossible to detect it in time. This reduces equipment maintenance time and improves production efficiency.
[0050] 3. This application solves the problem of weak flue gas capture capacity and large required exhaust volume of the slot-side exhaust hood by adopting the structural design of inner stator 4 and outer rotor 3, thereby improving the technical effect of flue gas capture.
[0051] 4. The inner stator 4 and outer rotor 3 of this application adopt a circular structural design, which solves the problem that the exhaust hood on the slot side can only adjust the collection range by changing the exhaust volume. By adopting a circular structure, the coverage area and range of the baffle can be adjusted by rotating the electric actuator 1, and the technical effect of flue gas collection is improved by adjusting the exhaust volume.
[0052] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0053] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0054] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0055] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0056] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.
[0058] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.
[0059] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.
Claims
1. A fume hood, characterized in that, The smoke exhaust hood comprises: An electric actuator; A rotating shaft, a first end of which is connected to the electric actuator; An outer rotor, which is in the shape of a barrel, comprises a bottom plate and an exhaust port arranged opposite to the bottom plate, and is provided with an opening part on the barrel body, and the bottom plate is connected to a second end of the rotating shaft; An inner stator, which is in the shape of a cylinder, is rotatably arranged in the barrel body of the outer rotor, and is provided with a trapping port; An exhaust pipe, one end of which is connected to the outer rotor provided with the exhaust port.
2. The exhaust hood of claim 1, wherein Further comprising: A bearing support, a top of which is connected to the rotating shaft.
3. The smoke exhaust hood according to claim 2, wherein: The opening part and the trapping port are both 90 degrees in opening arc.
4. The exhaust hood of claim 2, wherein Further comprising: A shielding plate, which is connected to the outer rotor.
5. The exhaust hood of claim 2 wherein, Further comprising: The exhaust port end is provided with an adjusting blade.
6. A fume hood as claimed in any one of claims 2-5, characterized in that Further comprising: A control system, which is electrically connected to the electric actuator.
7. The exhaust hood of claim 6 wherein, Further comprising: A remote controller, which is electrically connected to the control system.
8. The exhaust hood of claim 7, wherein Further comprising: A track, which is arranged on a four-around platform of a tundish.
9. The exhaust hood of claim 8, wherein, Further comprising: A wheel set, which is arranged at the bottom of the bearing support.
10. The exhaust hood of claim 9, wherein Further comprising: An electric motor, one end of which is connected to the wheel set, and the other end of which is electrically connected to the control system.