An energy-saving mobile baking preheating device for RH refining furnace

Abstract

The invention discloses an energy-saving mobile baking and preheating device for an RH refining furnace, comprising a vacuum tank, a baking cover and a preheating gun, wherein the baking cover is movably sleeved on the preheating gun, the preheating gun is connected to a mounting bracket, the mounting bracket comprises a gun rack, a rotating mechanism and a lifting mechanism, the upper end of the preheating gun is connected and fixed to the lifting mechanism and can be lifted and lowered under the drive of the lifting mechanism, the baking cover is connected to the lifting mechanism through a flexible connecting piece and makes the baking cover located at the lower part of the preheating gun when the flexible connecting piece is tightened, and the baking cover and the preheating gun can be relatively displaced when the flexible connecting piece is relaxed, the gun rack is fixed on the rotating mechanism and can be moved under the action of the rotating mechanism so that the preheating gun can be moved into or out of the space above the vacuum tank; the preheating gun is integrated with an offline roaster, so that the heat energy loss can be reduced, and the preheating gun can smoothly enter the vacuum tank even if it is slightly deformed, thereby achieving real energy saving.

Description

Technical Field

[0001] The invention relates to the technical field of RH refining furnaces, and in particular to an energy-saving mobile baking and preheating device for RH refining furnaces. Background Art

[0002] The RH process is a type of steel refining outside the furnace. In this process, the molten steel is circulated, degassed and alloyed in a vacuum tank. Refractory materials are built in the vacuum tank. Before preparing to treat the molten steel, the RH process needs to bake the refractory materials in the tank to 1100 degrees Celsius to prevent the molten steel from dropping too much in the cold tank. The moisture in the refractory materials will affect the steelmaking and refining process. The life of the RH vacuum tank immersion tube is limited and needs to be replaced regularly. In this process, the new and old tanks need to be switched in time by a mobile vacuum tank car, and the temperature in the vacuum tank after switching reaches the production conditions, then offline baking and preheating are required. There are also two ways of offline preheating and baking for this process, one is a baking cover with burners, and the other is a baking cover with holes before lifting and preheating. Since the preheating gun with lifting function can adjust the baking gun position and has the function of cold steel, it has become a better solution for offline preheating and cold steel. Since the opening area of ​​the upper flange of the vacuum tank is large, the heat dissipation during the baking process is large, and when using the preheating gun to bake the cold steel, a channel for the preheating gun to rise and fall needs to be reserved. Figure 1 As shown, the baking cover is fixed to a set of devices that can rotate left and right and flip up and down. First, this set of devices is not only complex in structure and high in manufacturing cost, but also occupies a large space, causing great inconvenience to production. Second, a large hole is opened in the middle of the baking cover, which is used to insert the preheating gun into the vacuum tank when the baking cover covers the vacuum tank. If the hole in the middle of the baking cover is opened too large, it is convenient for the preheating gun to enter, but the heat loss is large. If the hole is opened too small, the heat loss is reduced, but once the preheating gun is deformed, it cannot be inserted into the hole to enter the vacuum tank. Summary of the invention

[0003] In view of the above-mentioned shortcomings, the present invention provides an energy-saving mobile baking preheating device for RH refining furnace, which integrates the preheating gun with the offline baker, can reduce heat energy loss, and the preheating gun can smoothly enter the vacuum tank even if it is slightly deformed, thereby achieving real energy saving.

[0004] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0005] An energy-saving mobile baking preheating device for an RH refining furnace comprises a vacuum tank, a baking cover and a preheating gun, wherein the baking cover is movably sleeved on the preheating gun, and the preheating gun is connected to a mounting bracket, and the mounting bracket comprises a gun rack, a rotating mechanism and a lifting mechanism, the upper end of the preheating gun is connected and fixed to the lifting mechanism and can be lifted and lowered under the drive of the lifting mechanism, the baking cover is connected to the lifting mechanism through a flexible connecting piece and makes the baking cover located at the lower part of the preheating gun when the flexible connecting piece is tensioned, and the baking cover and the preheating gun can be relatively displaced when the flexible connecting piece is relaxed, and the gun rack is fixed on the rotating mechanism and can be moved under the action of the rotating mechanism so that the preheating gun can be moved into or out of the space above the vacuum tank.

[0006] According to one aspect of the present invention, the lifting mechanism includes a lifting trolley, a lifting rail and a lifting drive device, the lifting rail is fixed on the gun rack, the lifting trolley can be slidably connected to the lifting rail, the lifting drive device is fixed on the gun rack, the lifting trolley is connected to the lifting drive device and can undergo relative displacement in the vertical direction with the lifting rail under the drive of the lifting drive device.

[0007] According to one aspect of the present invention, the lifting drive device includes a driving motor arranged at the top of the gun rack and a transmission chain connected to the driving motor, and the lifting trolley is connected to the transmission chain.

[0008] According to one aspect of the present invention, a driving gear is provided at the output end of the driving motor, a driven sprocket is provided at the bottom of the gun rack, the driving gear and the driven sprocket are connected by a transmission chain, and the lifting trolley is fixed on the transmission chain.

[0009] According to one aspect of the present invention, the lifting trolley includes a fixed platform vertically arranged according to the gun rack, a fixed seat for fixing the preheating gun is provided on the front side of the fixed platform, and a roller and a limit member that limits the roller on the lifting track are provided on the rear side of the fixed platform.

[0010] According to one aspect of the present invention, the preheating gun includes a cylindrical gun body and a gun seat, the gun seat is provided with a pipe and a preheater connected to an external device, the preheater is connected to the gun body, and the center of the baking cover is provided with a through hole consistent with the shape of the outer wall of the gun body, and a sealing ring is provided in the through hole.

[0011] According to one aspect of the present invention, an adjusting device is provided below the driven sprocket for adjusting the tightness of the transmission chain, and a chain guard is provided on the driving gear.

[0012] According to one aspect of the present invention, the gun rack includes a first column and a second column, the first column and the second column are fixedly connected via a connecting rod, the first column is connected to a lifting mechanism, the second column is connected to a rotating mechanism, the rotating mechanism includes a rotating shaft and a rotating drive device, and the second column is fixedly connected to the rotating shaft.

[0013] According to one aspect of the present invention, the second column and the rotating shaft are an integral structure, the bottom of the second column is arranged on a movable rotating seat, the top of the second column is connected to a movable rotating seat, a connecting column is provided on one side of the second column, the connecting column is connected to a rotating drive device, and the rotating drive device drives the connecting column to move so that the second column rotates around the movable rotating seat.

[0014] According to one aspect of the present invention, the rotary drive device includes a power cylinder, which is arranged on the side of the second column. The power cylinder is provided with a power rod, and the power rod is movably connected to the connecting column.

[0015] Advantages of the present invention: The preheating gun is fixed on the lifting trolley to move up and down, and the baking cover is put on the preheating gun, and one end of the flexible connector is fixed on the moving trolley, and the other end is fixed on the baking cover, so that it moves up and down with the preheating gun. When the vacuum tank is to be baked, the lifting trolley descends, and the baking cover and the preheating gun descend together. When the baking cover covers the vacuum tank, since the flexible connector can expand or contract by itself, it will not affect the preheating gun from continuing to descend and reaching a certain position. This invention has a simple structure and low manufacturing cost, and solves the problem that the middle hole of the baking cover is opened too large, which makes it convenient for the preheating gun to enter, but the heat loss is large, and the heat loss is reduced when the hole is opened too small, but once the preheating gun is deformed, it cannot be inserted into the hole to enter the vacuum tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the off-line roaster described in the background technology of the present invention;

[0018] Figure 2 This is a schematic structural diagram of an energy-saving mobile baking preheating device for a RH refining furnace according to the present invention;

[0019] Figure 3 This is a schematic diagram of the top view of the structure of an energy-saving mobile baking and preheating device for an RH refining furnace described in the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figure 2 and Figure 3 As shown, an energy-saving mobile baking preheating device for RH refining furnace includes a vacuum tank 100, a baking cover 200 and a preheating gun 300, wherein the baking cover is movably mounted on the preheating gun, and the preheating gun is connected to a mounting bracket 400, wherein the mounting bracket includes a gun rack 1, a rotating mechanism 2 and a lifting mechanism 3, wherein the upper end of the preheating gun is connected and fixed to the lifting mechanism and can be lifted and lowered under the drive of the lifting mechanism, wherein the baking cover is connected to the lifting mechanism through a flexible connector 4 and makes the baking cover located at the lower part of the preheating gun when the flexible connector is tightened, and the baking cover and the preheating gun can be relatively displaced when the flexible connector is relaxed, wherein the gun rack is fixed on the rotating mechanism and can be moved under the action of the rotating mechanism so that the preheating gun can be moved into or out of the space above the vacuum tank. The preheating gun is fixed on a lifting trolley to move up and down, and the baking cover is mounted on the preheating gun, and one end of the flexible connector is fixed on the lifting trolley and the other end is fixed on the baking cover, and moves up and down with the preheating gun. When the vacuum tank is to be baked, the lifting trolley descends, and the baking cover and the preheating gun descend together. When the baking cover covers the vacuum tank, the flexible connector can expand or contract by itself, which will not affect the preheating gun from continuing to descend to a certain position.

[0022] In practical applications, the flexible connector may be selected as a plurality of steel ropes, preferably 4, or may be a plurality of chains, etc., and may be selected and applied according to actual needs.

[0023] In actual application, the lifting mechanism includes a lifting trolley 31, a lifting rail 32 and a lifting drive device 33. The lifting rail is fixed on the gun rack 1, the lifting trolley can be slidably connected to the lifting rail, the lifting drive device is fixed on the gun rack, and the lifting trolley is connected to the lifting drive device and can undergo relative displacement in the vertical direction with the lifting rail under the drive of the lifting drive device.

[0024] In practical applications, the lifting drive device 33 includes a driving motor 331 disposed at the top of the gun rack and a transmission chain 332 connected to the driving motor, and the lifting trolley is connected to the transmission chain.

[0025] In practical applications, a driving gear 333 is provided at the output end of the driving motor, a driven sprocket 334 is provided at the bottom of the gun rack, the driving gear and the driven sprocket are connected by a transmission chain, and the lifting trolley is fixed on the transmission chain.

[0026] In actual application, the lifting trolley includes a fixed platform 311 arranged vertically according to the gun rack, a fixed seat 312 for fixing the preheating gun is provided on the front side of the fixed platform, and a roller 314 and a limiter 313 that limits the roller on the lifting track are provided on the rear side of the fixed platform.

[0027] In actual application, the preheating gun 300 includes a cylindrical gun body 301 and a gun seat 302, the gun seat is provided with a pipe 303 connected to an external device and a preheater 304, the preheater is connected to the gun body, and a through hole consistent with the shape of the outer wall of the gun body is provided in the center of the baking cover, and a sealing ring 201 is provided in the through hole.

[0028] In practical applications, an adjusting device 335 is provided below the driven sprocket for adjusting the tightness of the transmission chain. The adjusting device is a plurality of nuts and a screw rod that cooperate to achieve adjustment. A chain guard 336 is provided on the driving gear.

[0029] In actual application, the gun rack 1 includes a first column 11 and a second column 12, and the first column and the second column are fixedly connected by a connecting rod 13. The connecting rod is designed as a triangular structure to enhance stability. The first column is connected to the lifting mechanism, and the second column is connected to the rotating mechanism. The rotating mechanism includes a rotating shaft 21 and a rotating drive device 22, and the second column is fixedly connected to the rotating shaft.

[0030] In actual application, the second column and the rotating shaft are an integrated structure, the bottom of the second column is set on a movable rotating seat 211, the top of the second column is connected to a movable rotating seat 211, and a connecting column 212 is provided on one side of the second column. The connecting column is connected to a rotating drive device, and the rotating drive device drives the connecting column to move so that the second column rotates around the movable rotating seat.

[0031] In actual application, the rotating drive device 22 includes a power cylinder 221, which is arranged on the side of the second column. The rear side of the power cylinder is movably connected to a fixed object. The power cylinder is provided with a power rod 222, which is movably connected to the connecting column. The power cylinder can be selected as a hydraulic cylinder or a power structure such as a cylinder.

[0032] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the art within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An energy-saving mobile baking preheating device for RH refining furnace, comprising a vacuum tank, a baking cover and a preheating gun, characterized in that: The baking cover is movably sleeved on the preheating gun, and the preheating gun is connected to a mounting bracket, and the mounting bracket includes a gun rack, a rotating mechanism and a lifting mechanism. The upper end of the preheating gun is fixedly connected to the lifting mechanism and can be lifted and lowered under the drive of the lifting mechanism. The baking cover is connected to the lifting mechanism through a flexible connector and is located at the lower part of the preheating gun when the flexible connector is tensioned. The flexible connector is a plurality of steel wire ropes or chains. When the flexible connector is relaxed, the baking cover and the preheating gun can be relatively displaced. The gun rack is fixed on the rotating mechanism and can be moved under the action of the rotating mechanism so that the preheating gun moves into or out of the space above the vacuum tank.

2. The energy-saving mobile baking preheating device for RH refining furnace according to claim 1 is characterized in that: The lifting mechanism includes a lifting trolley, a lifting track and a lifting drive device. The lifting track is fixed on the gun rack. The lifting trolley can be slidably connected to the lifting track. The lifting drive device is fixed on the gun rack. The lifting trolley is connected to the lifting drive device and can undergo relative displacement in the vertical direction with the lifting track under the drive of the lifting drive device.

3. The energy-saving mobile baking preheating device for RH refining furnace according to claim 2 is characterized in that: The lifting drive device comprises a driving motor arranged at the top of the gun rack and a transmission chain connected to the driving motor, and the lifting trolley is connected to the transmission chain.

4. The energy-saving mobile baking preheating device for RH refining furnace according to claim 3 is characterized in that: The output end of the driving motor is provided with a driving gear, the bottom of the gun rack is provided with a driven sprocket, the driving gear and the driven sprocket are connected by a transmission chain, and the lifting trolley is fixed on the transmission chain.

5. The energy-saving mobile baking preheating device for RH refining furnace according to claim 4 is characterized in that: The lifting trolley comprises a fixed platform vertically arranged according to the gun rack, a fixed seat for fixing the preheating gun is arranged at the front side of the fixed platform, and a roller and a limiter for limiting the roller on the lifting track are arranged at the rear side of the fixed platform.

6. The energy-saving mobile baking preheating device for RH refining furnace according to claim 1 is characterized in that: The preheating gun comprises a cylindrical gun body and a gun seat, the gun seat is provided with a pipeline connected to an external device and a preheater, the preheater is connected to the gun body, the center of the baking cover is provided with a through hole consistent with the shape of the outer wall of the gun body, and a sealing ring is provided in the through hole.

7. The energy-saving mobile baking preheating device for RH refining furnace according to claim 4 is characterized in that: An adjusting device is arranged below the driven sprocket for adjusting the tightness of the transmission chain, and a chain protection cover is arranged on the driving gear.

8. The energy-saving mobile baking preheating device for RH refining furnace according to any one of claims 1 to 7, characterized in that: The gun rack includes a first column and a second column, the first column and the second column are fixedly connected via a connecting rod, the first column is connected to a lifting mechanism, the second column is connected to a rotating mechanism, the rotating mechanism includes a rotating shaft and a rotating drive device, and the second column is fixedly connected to the rotating shaft.

9. The energy-saving mobile baking preheating device for RH refining furnace according to claim 8 is characterized in that: The second column and the rotating shaft are an integral structure, the bottom of the second column is arranged on a movable rotating seat, the top of the second column is connected to a movable rotating seat, a connecting column is provided on one side of the second column, the connecting column is connected to a rotating drive device, and the rotating drive device drives the connecting column to move so that the second column rotates around the movable rotating seat.

10. The energy-saving mobile baking preheating device for RH refining furnace according to claim 9, characterized in that: The rotary drive device comprises a power cylinder, which is arranged on the side of the second column. The power cylinder is provided with a power rod, and the power rod is movably connected to the connecting column.

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