Furnace cover of refining furnace

Abstract

The utility model discloses a refining furnace cover which comprises a lower cover body, an upper cover body, a central cover body and a synchronous lifting device, the upper cover body is arranged on the lower cover body, the central cover body is arranged on the upper cover body, and the synchronous lifting device comprises a plurality of sets of lifting hydraulic cylinders, a plurality of L-shaped jacking supports and a hydraulic station. The L-shaped jacking supports are arranged on the side face of the lower cover body in a surrounding mode at equal intervals, the number of the lifting hydraulic cylinders corresponds to that of the L-shaped jacking supports, one ends of the lifting hydraulic cylinders are connected with one ends of the L-shaped jacking supports, the other ends of the lifting hydraulic cylinders are fixedly connected to the refining platform, and the hydraulic station is communicated with the lifting hydraulic cylinders. The hydraulic station simultaneously drives the lifting hydraulic cylinders to push the L-shaped jacking support to lift the furnace cover, deviation and shaking are avoided in the lifting process, the furnace cover is kept in the center of the furnace body, gaps between the furnace cover and an upper opening of the furnace body are reduced, and the temperature in the furnace and the smelting atmosphere are kept to the maximum extent; and the risk of rubbing the electrode and the furnace body in the lifting process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of refining, in particular to a refining furnace cover. Background Art

[0002] The production of high-quality ferroalloys is extremely important in the industrial field. The smelting atmosphere of the low-carbon ferromanganese refining furnace is directly related to the performance of the furnace cover. Ensuring the lifting function of the refining furnace cover is not only an important process, but also a key link in controlling product quality. Some existing water-cooled furnace covers need to be lifted and lowered due to their large weight. During the lifting process of the furnace cover, there is a large shaking amplitude and offset phenomenon, which makes it easy to rub the electrode and hit the furnace body during the lifting process of the furnace cover, causing the electrode to break, and the furnace cover and furnace body to be damaged. In addition, the offset between the upper mouth of the furnace body and the furnace cover is too large, affecting the temperature in the furnace and the smelting atmosphere. Utility Model Content

[0003] The main purpose of the utility model is to overcome the defects of the above-mentioned background technology and provide a refining furnace cover.

[0004] To achieve the above-mentioned purpose, the refining furnace cover proposed in the utility model includes a lower cover body, an upper cover body, a central cover body and a synchronous lifting device, the upper cover body is arranged on the lower cover body, the central cover body is arranged on the upper cover body, the side of the lower cover body is provided with an operating door and a dust removal smoke hole, the upper cover body is provided with a plurality of furnace charge feeding holes, the central cover body is provided with an electrode hole and a central feeding hole, the synchronous lifting device includes a plurality of groups of lifting hydraulic cylinders, a plurality of L-shaped lifting brackets and a hydraulic station, a plurality of L-shaped lifting brackets are equidistantly arranged on the side of the lower cover body, the number of the lifting hydraulic cylinders corresponds to the number of the L-shaped lifting brackets, one end of the lifting hydraulic cylinder is connected to one end of the L-shaped lifting bracket, the other end of the lifting hydraulic cylinder is fixedly connected to the refining platform, and the hydraulic station is communicated with the lifting hydraulic cylinder. The hydraulic station drives several groups of lifting hydraulic cylinders to push out at the same time, pushing the L-shaped lifting bracket to carry the entire furnace cover to move up and down. During the lifting and lowering process, the furnace cover as a whole does not shift, so that the lifting of the furnace cover remains in the center position of the furnace body, reducing the gap between the furnace cover and the upper mouth of the furnace body, and maintaining the furnace temperature and smelting atmosphere to the maximum extent.

[0005] To further optimize the technical solution, the synchronous lifting device also includes a guide frame and a guide wheel, the lifting hydraulic cylinder is vertically arranged inside the guide frame, the bottom end of the guide frame is fixedly connected to the refining platform, and the guide wheel is arranged on the inner wall of the guide frame and abuts against the outer wall of the lifting hydraulic cylinder. Through the arrangement of the guide frame and the guide wheel, the lifting hydraulic cylinder is guided when the lifting hydraulic cylinder is lifted, so as to avoid the lifting hydraulic cylinder from being skewed.

[0006] To further optimize the technical solution, the guide frame is a rectangular frame structure, and a long passage is provided on one side of the guide frame close to the L-shaped lifting bracket, and travel switches are provided at the top and bottom of the long passage. The long passage is provided to avoid affecting the up and down movement of the L-shaped lifting bracket, and the travel switch is used to limit the movement of the L-shaped lifting bracket during lifting, thereby improving safety.

[0007] To further optimize the technical solution, a hydraulic synchronous shunt is connected to the top oil line of the lifting hydraulic cylinder. The hydraulic synchronous shunt synchronizes the lifting actions of all lifting hydraulic cylinders when working under load (with a deviation of less than 10 mm), thereby achieving a smooth lifting of the furnace cover.

[0008] To further optimize the technical solution, the inlet and outlet pipes of the hydraulic station are connected with a hydraulic lock. By setting the hydraulic lock, the furnace cover can still be locked in a stationary position when the hydraulic pressure fails, thereby avoiding major equipment safety accidents.

[0009] To further optimize the technical solution, the lifting hydraulic cylinders are provided with four groups, and the angles between the four groups of lifting hydraulic cylinders are all 90 degrees. The furnace cover is lifted synchronously by symmetrically setting the four groups of lifting hydraulic cylinders to avoid uneven lifting force, lifting asynchronism, creeping and other faults and hidden dangers.

[0010] To further optimize the technical solution, the lower cover body is in a frustum-shaped structure, the lower cover body is welded with Q345R steel plates, and a first cooling chamber for connecting cooling water is provided inside the lower cover body.

[0011] To further optimize the technical solution, the upper cover body is an arched structure formed by welding around a 20G seamless pipe, and the outer diameter of the upper cover body matches the inner diameter of the lower cover body.

[0012] To further optimize the technical solution, the central cover body is made of stainless steel and has a disc structure, and a second cooling chamber for connecting cooling water is provided inside the central cover body.

[0013] To further optimize the technical solution, the inner sides of the lower cover body, the upper cover body and the central cover body are all knotted with refractory materials, and the thickness of the refractory materials is ≥80mm.

[0014] The beneficial effects of the utility model include: driving several groups of lifting hydraulic cylinders to push out simultaneously through the hydraulic station, pushing the L-shaped lifting bracket to carry the entire furnace cover for lifting and lowering. During the lifting and lowering process, the furnace cover as a whole does not deviate or shake, so that the lifting of the furnace cover is maintained in the center position of the furnace body, reducing the gap between the furnace cover and the upper opening of the furnace body, maintaining the temperature and smelting atmosphere in the furnace to the maximum extent, and reducing the risk of the furnace cover rubbing against the electrode and the furnace body during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the front view of the refining furnace cover in the embodiment of the utility model.

[0016] Figure 2 It is a schematic diagram of a top view of a refining furnace cover in an embodiment of the utility model.

[0017] Figure 3 It is a schematic diagram of a guide frame in an embodiment of the present utility model.

[0018] Figure 4 It is a schematic diagram of the connection between the lifting hydraulic cylinder and the hydraulic station in the embodiment of the utility model.

[0019] Figure numerals: 1 lower cover; 101 operating door; 102 dust removal fume hole; 2 upper cover; 201 furnace charge feeding hole; 3 center cover; 301 electrode hole; 302 center feeding hole; 4 synchronous lifting device; 401 lifting hydraulic cylinder; 402 L-type lifting bracket; 403 hydraulic station; 404 guide frame; 405 guide wheel; 406 long strip passage; 407 travel switch; 408 hydraulic synchronous diverter; 409 hydraulic lock; 5 refining platform. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for both fixing and circuit connection.

[0022] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0023] In addition, 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0024] See also Figures 1 to 4 In one embodiment, a refining furnace cover is disclosed, comprising a lower cover body 1, an upper cover body 2, a central cover body 3 and a synchronous lifting device 4, wherein the upper cover body 2 is arranged on the lower cover body 1, and the central cover body 3 is arranged on the upper cover body 2, the lower cover body 1, the upper cover body 2 and the central cover body 3 are coaxially arranged, two operating doors 101 and two dust removal smoke holes 102 are arranged on the side of the lower cover body 1, and a plurality of furnace charge feeding holes 201 are arranged on the upper cover body 2, for example, three furnace charge feeding holes 201 are arranged, and the specific number can be arranged according to the process to meet the uniformity requirements of the smelting process on the distribution of the furnace, and three electrode holes 301 and one central feeding hole 302 are arranged on the central cover body 3, and the synchronous lifting device 4 It includes several groups of lifting hydraulic cylinders 401, several L-shaped lifting brackets 402 and a hydraulic station 403. The several L-shaped lifting brackets 402 are equidistantly arranged on the side of the lower cover body 1. The number of lifting hydraulic cylinders 401 corresponds to the number of L-shaped lifting brackets 402. Specifically, the L-shaped lifting bracket 402 is flipped 180° clockwise, one end of the L-shaped lifting bracket 402 is fixedly connected to the side of the lower cover body 1, and the other end of the L-shaped lifting bracket 402 extends outward. One end of the lifting hydraulic cylinder 401 is connected to the end of the L-shaped lifting bracket 402 extending outward, and the other end of the lifting hydraulic cylinder 401 is fixedly connected to the 6-meter refining platform 5. The hydraulic station 403 is connected to the lifting hydraulic cylinder 401. In this embodiment, a plurality of lifting hydraulic cylinders 401 are driven to be pushed out simultaneously by the hydraulic station 403, pushing the L-shaped lifting bracket 402 to carry the entire furnace cover for lifting and lowering. During the lifting and lowering process, the furnace cover as a whole does not deviate or shake, so that the lifting of the furnace cover is maintained at the center position of the furnace body, reducing the gap between the furnace cover and the upper opening of the furnace body, maintaining the temperature and smelting atmosphere in the furnace to the maximum extent, and reducing the risk of the furnace cover rubbing against the electrode and the furnace body during the lifting process.

[0025] In a preferred embodiment, the synchronous lifting device 4 further includes a guide frame 404 and a guide wheel 405, the lifting hydraulic cylinder 401 is vertically arranged inside the guide frame 404, the bottom end of the guide frame 404 is fixedly connected to the refining platform 5, and the guide wheel 405 is arranged on the inner wall of the guide frame 404 and abuts against the outer wall of the lifting hydraulic cylinder 401. Specifically, the lifting hydraulic cylinder 401 is inverted in the guide frame 404, that is, the extended end of the piston rod of the lifting hydraulic cylinder 401 is fixedly connected to the refining platform 5, the cylinder body of the lifting hydraulic cylinder 401 is fixedly connected to the L-shaped lifting bracket 402, the guide wheel 405 is arranged on the inner side wall of the guide frame 404 and abuts against the outer side wall of the cylinder body of the lifting hydraulic cylinder 401, and multiple guide wheels 405 can be arranged around the same horizontal plane at the same time to limit the horizontal displacement of the lifting hydraulic cylinder 401, so as to avoid the lifting hydraulic cylinder 401 from tilting and shaking when it is ejected, thereby affecting the lifting movement of the entire furnace cover.

[0026] In a preferred embodiment, the guide frame 404 is a rectangular frame structure, and a long passage 406 is provided on one side of the guide frame 404 close to the L-shaped lifting bracket 402, and a travel switch 407 is provided at the top and bottom of the long passage 406. Specifically, one end of the L-shaped lifting bracket 402 passes through the long passage 406 into the interior of the guide frame 404 and is fixedly connected to the cylinder body of the lifting hydraulic cylinder 401. When lifting, the travel switch 407 limits the movement of the L-shaped lifting bracket 402 to improve safety.

[0027] In a preferred embodiment, a hydraulic synchronous diverter 408 is connected to the top oil outlet of the lifting hydraulic cylinder 401. Specifically, the oil inlet of the hydraulic synchronous diverter 408 is connected to the oil outlet of the hydraulic station 403, and the diverter oil port of the hydraulic synchronous diverter 408 is connected to the top oil inlet of each lifting hydraulic cylinder 401. The hydraulic synchronous diverter 408 is also called a hydraulic synchronous motor or a synchronous diverter motor. It is an existing outsourced product, and the specific structure is not repeated. The hydraulic synchronous diverter 408 synchronizes the lifting actions of all lifting hydraulic cylinders 401 when working with load (less than 10mm deviation), so as to achieve a smooth lifting of the furnace cover.

[0028] In a preferred embodiment, a hydraulic lock 409 is connected to the inlet and outlet pipelines of the hydraulic station 403. The oil outlet and return oil of the hydraulic station 403 are both connected to the hydraulic lock 409, which ensures that the lifting hydraulic cylinder 401 can maintain its position and lock even if there is a certain load outside in the hydraulic failure state, thereby avoiding major equipment safety accidents.

[0029] In a preferred embodiment, four groups of lifting hydraulic cylinders 401 are provided, and the angles between the four groups of lifting hydraulic cylinders 401 are all 90°. By providing four groups of lifting hydraulic cylinders 401 to synchronously lift the furnace cover, the center of gravity of the furnace cover is always maintained at the lifting center of the lifting hydraulic cylinders 401, thereby avoiding failures and hidden dangers such as lifting asynchronism and creeping of the furnace cover during the lifting process.

[0030] In a preferred embodiment, the lower cover body 1 is a frustoconical structure, the lower cover body 1 is welded with Q345R steel plate, a first cooling chamber (not shown) for connecting cooling water is provided inside the lower cover body 1, the upper cover body 2 is an arched structure welded around a 20G seamless pipe, the outer diameter of the upper cover body 2 matches the inner diameter of the lower cover body 1, the central cover body 3 is a disc structure made of stainless steel, a second cooling chamber (not shown) for connecting cooling water is provided inside the central cover body 3, the inner sides of the lower cover body 1, the upper cover body 2 and the central cover body 3 are all knotted with refractory materials, and the thickness of the refractory materials is ≥80mm, the lower cover body 1 needs to be in contact with the furnace body, and is designed as a plate-type water-cooled structure for greater durability, the upper cover body 2 is a water-cooled furnace cover of a tubular structure, the arched structure has good processability, and internal stress is eliminated by annealing after welding, the central cover body 3 is a water-cooled frame made of stainless steel, and the inner side walls of the furnace cover are all knotted with refractory materials to ensure its durability.

[0031] The above content is a further detailed description of the utility model in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, it can also make several substitutions or modifications to these described embodiments, and these substitutions or modifications should be regarded as belonging to the scope of protection of the utility model. In the description of this specification, the description of the reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the absence of mutual contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations may be made herein without departing from the scope of protection of the patent application.

Claims

1. A refining furnace cover, characterized in that: It includes a lower cover body, an upper cover body, a central cover body and a synchronous lifting device. The upper cover body is arranged on the lower cover body, the central cover body is arranged on the upper cover body, the side of the lower cover body is provided with an operating door and a dust removal fume hole, the upper cover body is provided with a plurality of charge feeding holes, the central cover body is provided with an electrode hole and a central feeding hole, the synchronous lifting device includes a plurality of groups of lifting hydraulic cylinders, a plurality of L-shaped lifting brackets and a hydraulic station, a plurality of L-shaped lifting brackets are equidistantly arranged on the side of the lower cover body, the number of the lifting hydraulic cylinders corresponds to the number of the L-shaped lifting brackets, one end of the lifting hydraulic cylinder is connected to one end of the L-shaped lifting bracket, the other end of the lifting hydraulic cylinder is fixedly connected to the refining platform, and the hydraulic station is communicated with the lifting hydraulic cylinder.

2. The refining furnace cover according to claim 1, characterized in that: The synchronous lifting device also includes a guide frame and a guide wheel. The lifting hydraulic cylinder is vertically arranged inside the guide frame. The bottom end of the guide frame is fixedly connected to the refining platform. The guide wheel is arranged on the inner wall of the guide frame and abuts against the outer wall of the lifting hydraulic cylinder.

3. The refining furnace cover according to claim 2, characterized in that: The guide frame is in a rectangular frame structure. A long passage is provided on one side of the guide frame close to the L-shaped lifting bracket. Travel switches are provided at the top and bottom of the long passage respectively.

4. The refining furnace cover according to claim 3, characterized in that: The top outlet oil path of the lifting hydraulic cylinder is connected with a hydraulic synchronous flow divider.

5. The refining furnace cover according to claim 4, characterized in that: The inlet and outlet pipelines of the hydraulic station are connected with a hydraulic lock.

6. The refining furnace cover according to claim 5, characterized in that: The lifting hydraulic cylinders are provided in four groups, and the included angles between the four groups of lifting hydraulic cylinders are all 90°.

7. The refining furnace cover according to any one of claims 1 to 6, characterized in that: The lower cover body is in a frustum-shaped structure and is welded with Q345R steel plates. A first cooling chamber for connecting cooling water is provided inside the lower cover body.

8. The refining furnace cover according to claim 7, characterized in that: The upper cover body is an arched structure formed by welding around a 20G seamless pipe, and the outer diameter of the upper cover body matches the inner diameter of the lower cover body.

9. The refining furnace cover according to claim 8, characterized in that The central cover body is a disc structure made of stainless steel, and a second cooling chamber for connecting cooling water is provided inside the central cover body.

10. The refining furnace cover according to claim 9, characterized in that: The inner sides of the lower cover body, the upper cover body and the central cover body are all knotted with refractory materials, and the thickness of the refractory materials is ≥80mm.

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