Insulation device for desulfurization stirring head

Abstract

The present invention discloses a heat preservation device for a desulfurization stirring head, which relates to the technical field of hot metal desulfurization equipment. The heat preservation device for the desulfurization stirring head comprises a heat preservation cover and a driving frame. The heat preservation cover includes a first cover body and a second cover body. The first cover body and the second cover body are spliced left and right to form a heat preservation cover that is sealed around and at the bottom and has a notch reserved at the top. The width of the notch is greater than the diameter of the stirring rod connected to the stirring head. A cavity for placing the stirring head is provided inside the heat preservation cover. The first cover body and the second cover body are respectively connected to the driving frame, and the driving frame drives the first cover body and the second cover body to move towards or away from each other. The heat preservation device provided by the present invention extends to the position where the stirring head is located during the period when the stirring head stops working, seals the stirring head, reduces or compensates for the heat loss of the stirring head, thereby improving the production efficiency of hot metal desulfurization and subsequent converter processes and the service life of the stirring head.

Description

Technical Field

[0001] The present invention relates to the technical field of hot metal desulfurization equipment, and particularly to a heat preservation device for a desulfurization stirring head. Background Art

[0002] In the modern steelmaking production process flow, hot metal needs to be pretreated for desulfurization before being poured into the converter. The commonly used desulfurization method is the mechanical stirring method. The specific process is as follows: After the hot metal ladle reaches the desulfurization station and completes the preparatory work such as skimming the previous slag, temperature measurement and sampling, a cross-shaped stirring head formed by casting refractories is lowered and inserted into the hot metal to rotate and generate a vortex. Then, a certain amount of desulfurizer is put into the hot metal vortex, so that the desulfurizer and sulfur in the hot metal quickly undergo a desulfurization reaction during continuous stirring; after the desulfurization stirring is completed, the stirring head is lifted out of the hot metal, and operations such as skimming the subsequent slag, temperature measurement and sampling, and leaving the station are completed for the hot metal ladle. From the end of the previous desulfurization stirring to the start of the next desulfurization stirring, the high-temperature stirring head is exposed to the air, and the temperature of the refractory continuously decreases. During the next desulfurization stirring process, the stirring head with a relatively low temperature contacts the high-temperature hot metal and absorbs the heat of the hot metal. On the one hand, it causes the temperature of the hot metal in the hot metal ladle to decrease, affecting the production rhythm and material consumption of the desulfurization process itself and the subsequent converter process; on the other hand, the frequent rapid cooling and heating of the stirring head will cause thermal shock damage to the refractory, shortening the service life of the stirring head.

[0003] Therefore, how to reduce the heat loss of the hot metal desulfurization stirring head during the interval between two stirrings is an important issue for improving the desulfurization and steelmaking production efficiency and the service life of the stirring head. Chinese Patent No. CN210415428U discloses an insulation cover for an injection molding machine. The insulation cover is divided into two parts, namely a first insulation cover and a second insulation cover. The first and second insulation covers are joined together to play a heat preservation role. This device is for the heat preservation of the injection molding machine, and its main purpose is to eliminate the extrusion of the injection molding machine caused by the thermal expansion of the insulation cover. The fields are very different, and when it is transferred to the heat preservation of the desulfurization stirring head, problems such as sealing, separation, and drive control need to be solved. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a heat preservation device for a desulfurization stirring head, which seals the stirring head during the interval between two desulfurization stirring operations, plays a role of heat preservation or even constant temperature heating, and reduces or compensates for heat energy loss.

[0005] To achieve this technical purpose, the present invention adopts the following scheme: A heat preservation device for a desulfurization stirring head includes a heat preservation cover and a driving frame. The heat preservation cover includes a first cover body and a second cover body. The first cover body and the second cover body are spliced left and right to form a heat preservation cover that is sealed around and at the bottom and has a notch reserved at the top. The width of the notch is greater than the diameter of the transmission connecting rod of the stirring head. A cavity for placing the stirring head is provided inside the heat preservation cover; the first cover body and the second cover body are respectively connected to the driving frame, and the driving frame drives the first cover body and the second cover body to move towards or away from each other.

[0006] Compared with the prior art, the beneficial effects of the present invention are as follows: The heat preservation device provided by the present invention extends to the position where the stirring head is located during the period when the stirring head stops working, seals the stirring head, reduces the radiative and convective heat transfer with the environment, reduces the heat loss of the stirring head, and thus improves the production efficiency of the desulfurization process and the subsequent converter process and the service life of the stirring head.

[0007] The preferred solution of the present invention is:

[0008] The bottom of the first cover body is an open structure, the bottom plate of the second cover body extends to the outer wall position of the first cover body, and a detachable slag receiving tray is placed on the bottom plate of the second cover body; there will be residual iron water droplets dripping after the stirring head is extracted from the ladle, and the slag receiving tray is used to receive the dripping solid slag to prevent corrosion and damage to the inner wall of the heat preservation cover, and the slag receiving tray is cleaned and replaced regularly.

[0009] Receiving notches are respectively formed on the upper end surfaces of the first cover body and the second cover body, and the side walls of the receiving notches are attached to the side walls of the transmission connecting rod of the desulfurization stirring head. The first notches of the first cover body and the second cover body are spliced together to accommodate the transmission rod of the stirring head.

[0010] The driving frame includes a driving mechanism, a transmission rod, a support frame and a counterweight. Transmission rods are respectively connected to the outer walls of the first cover body and the second cover body, the transmission rods are connected to the driving mechanism, the driving mechanism is arranged on the support frame, and a counterweight is also arranged on the support frame, and the counterweight and the heat preservation cover are arranged on both sides of the support frame.

[0011] The driving mechanism includes a motor and a lead screw. The motor is connected to one end of the lead screw, the other end of the lead screw is rotatably connected to one end of the support frame, and the other end of the support frame is connected to the motor; the lead screw is a bidirectional lead screw, and the two transmission rods are respectively threadedly connected to the left and right sides of the lead screw.

[0012] The driving mechanism includes a first motor, a second motor and a lead screw. The first motor is connected to one end of the lead screw, the other end of the lead screw is rotatably connected to one end of the support frame, and the other end of the support frame is connected to the first motor; the transmission rod is divided into a fixed rod and a rotating rod, the fixed rod is connected to the first cover body or the second cover body, the rotating rod is connected to the remaining second cover body or the first cover body, the fixed rod is threadedly connected to the lead screw, the fixed rod is sleeved on the output shaft of the second motor through a bearing, and the output shaft of the second motor is also key-connected to the rotating rod.

[0013] The fixed rod, the rotating rod and the second motor form a structure similar to a scissors brace.

[0014] It further includes a vertical support structure, and the vertical support structure includes a vertical rod and a base. The driving frame is connected to the vertical rod, and the lower end of the vertical rod is fixed on the base.

[0015] The vertical rod is a lifting mechanism, which is connected to the driving frame and drives the driving frame to lift; the lifting mechanism can be any one of a telescopic cylinder, a chain lifting mechanism, a gear lifting mechanism, and a lead screw lifting mechanism.

[0016] A heating structure is arranged inside the heat preservation cover. The heating structure can be a heating resistance wire to ensure that the temperature of the stirring head is close to the temperature of the molten iron in the ladle and minimize the heat energy loss. Brief Description of the Drawings

[0017] Figure 1 An isometric view of a heat preservation device for a desulfurization stirring head provided by an embodiment of the present invention;

[0018] Figure 2 is Figure 1 a top view of the heat preservation device for the desulfurization stirring head in

[0019] Figure 3 A structural schematic diagram of the heat preservation cover provided by an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of another implementation manner provided by the present invention;

[0021] The markings in the figure are: 1, the first cover body; 11, the slag receiving tray; 12, the fixed rod; 2, the second cover body; 21, the rotating rod; 22, the cover body counterweight; 23, the second motor; 3, the accommodating notch; 4, the transmission rod; 5, the bidirectional lead screw; 6, the motor; 7, the support frame; 71, the stabilizing rod; 72, the counterweight; 8, the vertical rod; 9, the base. Detailed Description of the Invention

[0022] To fully understand the purpose, features, and effects of the present invention, the present invention will be described in detail through the following specific embodiments, but the present invention is not limited thereto.

[0023] Such as Figure 1 and Figure 2As shown in the figure, a heat preservation device for a desulfurization stirring head provided by the present invention consists of a heat preservation cover and a driving frame, etc. Among them, the heat preservation cover is composed of a first cover body 1, a second cover body 2, a slag receiving tray 11, etc. The first cover body 1 and the second cover body 2 are spliced together on the left and right to form a heat preservation cover body structure with a sealed bottom and side walls and a notch reserved at the top for wrapping the stirring rod of the stirring head. The size of the notch is slightly larger than the outer diameter of the stirring rod connected to the stirring head, so that the side wall of the notch fits the stirring rod of the stirring head, reducing heat loss. The first cover body 1 and the second cover body 2 are complementary structures. The lower end surface of either the first cover body 1 or the second cover body 2 is an open structure, and the lower end surface of the remaining second cover body 2 or first cover body 1 is a closed bottom plate. The bottom plate completely seals the lower end opening of the other half of the cover body, so that a cavity for placing the stirring head is formed inside the spliced heat preservation cover. An accommodation notch 3 is provided on the upper end surface of the first cover body 1 and / or the second cover body 2, and the side wall of the accommodation notch 3 fits the side wall of the transmission connecting rod of the desulfurization stirring head.

[0024] Preferably, a heating structure such as a resistance wire or a heating rod is installed inside the heat preservation cover to ensure that the stirring head is kept at a constant temperature and is closer to the temperature of the molten iron to be treated.

[0025] A slag receiving tray 11 is placed on the bottom plate. Vertical surfaces are fixed around the slag receiving tray 11 to form a shallow groove structure to prevent the molten iron dripping from the stirring head from corroding the heat preservation cover. The slag receiving tray 11 can be disassembled at will to facilitate cleaning the residue on the slag receiving tray 11. Preferably, the heat preservation cover is made of a high-temperature resistant and corrosion-resistant material.

[0026] The driving frame consists of a driving mechanism, a transmission rod 4, a support frame 7, a counterweight 72, etc. A transmission rod 4 is respectively connected to the outer walls of the first cover body 1 and the second cover body 2. The transmission rod 4 is connected to the driving mechanism, and the driving mechanism is installed on the support frame 7. A counterweight 72 is provided on the support frame 7, and the counterweight 72 and the heat preservation cover are respectively arranged on both sides of the support frame 7.

[0027] Preferably, the driving mechanism consists of a motor 6 and a lead screw, etc. The motor 6 is fixed at one end of the support frame 7. The output shaft of the motor 6 is connected to one end of the lead screw, and the other end of the lead screw is sleeved on the other end of the support frame 7 and can rotate. The lead screw is a bidirectional lead screw 5. One side thread of the bidirectional lead screw 5 is a right-handed thread, and the other side thread is a left-handed thread. Each thread is connected to a transmission rod 4, or a connecting block is connected to each thread, and each connecting block is fixedly connected to a transmission rod 4. The motor 6 rotates to drive the bidirectional lead screw 5 to rotate, thereby driving the transmission rod 4 to move towards or away from each other, realizing the splicing or separation of the first cover body 1 and the second cover body 2. For a more stable structure, a stabilizing rod 71 is also connected to the support frame 7. The end of the transmission rod 4 not connected to the heat preservation cover is inserted into the stabilizing rod 71 and can slide along the stabilizing rod 71 to play a stabilizing role.

[0028] Preferably, for another embodiment, please refer toFigure 4 , the driving mechanism consists of a first motor, a second motor 23, a lead screw, etc. The first motor is fixed at one end of the support frame 7. The output shaft of the first motor is connected to one end of the lead screw. The other end of the lead screw is sleeved on the other end of the support frame 7 and can rotate. The lead screw is a unidirectional threaded lead screw. The transmission rod is divided into a fixed rod 12 and a rotating rod 21. One end of the fixed rod 12 is fixedly connected to the first cover 1 or the second cover 2. The other end of the fixed rod 12 is threadedly connected to the lead screw. At the same time, the fixed rod 12 is also sleeved on the output shaft of the second motor 23 through a bearing. One end of the rotating rod 21 is also key-connected to the output shaft of the second motor 23. The other end of the rotating rod 21 is fixedly connected to the remaining second cover 2 or the first cover 1. The fixed rod 12, the rotating rod 21 and the second motor 23 form a structure similar to a scissors brace. The second motor 23 is carried on the lower part of the fixed rod 12 through a connecting structure and is supported by the fixed rod 12. For the stability of the equipment operation, a cover weight 22 is installed at the other end of the rotating rod 21. At the same time, the slag receiving tray 11 is a disc or a rectangular tray with rounded corners at the four corners, or grooves are opened on the bottom plate of the cover, and the slag receiving tray 11 is embedded in the grooves to ensure the perfect closure of the rotating cover and the fixed cover. During operation, the second motor 23 rotates to drive the rotating rod 21 to rotate clockwise or counterclockwise, realizing the splicing or separation of the first cover 1 and the second cover 2; when the desulfurization head performs desulfurization work, the heat preservation cover needs to make way for the working space for the desulfurization head to sink. Therefore, the first motor is started, and the rotation of the lead screw drives the fixed rod 12 to move, thereby driving the heat preservation cover out of the working space for the desulfurization head to sink. Further, the lead screw structure can be removed, and the output shaft of the first motor is directly connected perpendicular to the length direction of the fixed rod 12. The second motor 23 drives the fixed rod 12 and the heat preservation cover to rotate, so as to make way for the working space for the desulfurization head to sink.

[0029] Further, the heat preservation device of the desulfurization stirring head further includes a vertical support structure. The vertical support structure consists of a vertical rod 8, a base 9, etc. The support frame 7 is fixedly connected or movably connected to the vertical rod 8. The lower end of the vertical rod 8 is fixed on the base 9. Preferably, the vertical rod 8 is a lifting structure, and the lifting structure is any one of a telescopic cylinder (such as an electric cylinder, a hydraulic cylinder), a chain lifting mechanism, a gear lifting mechanism, a lead screw lifting mechanism, etc. The lifting structure drives the support frame 7 to move up and down to adapt to stirring heads of different heights. At the same time, the lower part of the base 9 is equipped with walking wheels with a self-locking function, and the position of the device can be moved arbitrarily.

[0030] During operation, the first cover 1 and the second cover 2 are separated back to back or the whole heat preservation cover moves to make way for the working space of the stirring head. When the hot metal ladle completes desulfurization, the stirring head is lifted, the heat preservation cover rotates to the position of the stirring head, and the first cover 1 and the second cover 2 are joined to tightly wrap the stirring head, reducing the heat loss of the stirring head before the arrival of the second hot metal ladle. Start the lifting structure to adjust the height of the heat preservation cover, and push the base 9 to adjust the position of the heat preservation device to adapt to different working conditions.

[0031] Finally, it should be noted that the above-listed are only the preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and variations fall within the scope of the claims of the present invention and its equivalent technologies, they should all be considered within the protection scope of the present invention.

Claims

1. An insulation device for a desulfurization stirring head, characterized in that, It includes a heat preservation cover and a driving frame. The heat preservation cover includes a first cover body and a second cover body. The first cover body and the second cover body are spliced left and right to form a heat preservation cover that is sealed around and at the bottom and has a notch reserved at the top. The width of the notch is greater than the diameter of the transmission connecting rod of the stirring head. A cavity for placing the stirring head is provided inside the heat preservation cover; The first cover body and the second cover body are respectively connected to the driving frame, and the driving frame drives the first cover body and the second cover body to move towards or away from each other; The bottom of the first cover body is an open structure. The bottom plate of the second cover body extends to the outer wall position of the first cover body, and a detachable slag receiving tray is placed on the bottom plate of the second cover body; The driving frame includes a driving mechanism, a transmission rod, a support frame and a counterweight. Transmission rods are respectively connected to the outer walls of the first cover body and the second cover body. The transmission rods are connected to the driving mechanism. The driving mechanism is arranged on the support frame, and a counterweight is also arranged on the support frame. The counterweight and the heat preservation cover are arranged on both sides of the support frame; The driving mechanism includes a motor and a lead screw. The motor is connected to one end of the lead screw, and the other end of the lead screw is rotatably connected to one end of the support frame. The other end of the support frame is connected to the motor; the lead screw is a bidirectional lead screw, and the two transmission rods are respectively threadedly connected to one side of the lead screw; Or, the driving mechanism includes a first motor, a second motor and a lead screw. The first motor is connected to one end of the lead screw, and the other end of the lead screw is rotatably connected to one end of the support frame. The other end of the support frame is connected to the first motor; the transmission rod is divided into a fixed rod and a rotating rod. The fixed rod is connected to the first cover body or the second cover body, and the rotating rod is connected to the remaining second cover body or the first cover body. The fixed rod is threadedly connected to the lead screw, and the fixed rod is sleeved on the output shaft of the second motor through a bearing. The output shaft of the second motor is also key-connected to the rotating rod; the fixed rod, the rotating rod and the second motor form a scissors bracing structure.

2. The heat preservation device of the desulfurization stirring head according to claim 1, characterized in that Receiving notches are respectively opened on the upper end surfaces of the first cover body and / or the second cover body, and the side walls of the receiving notches are attached to the side walls of the stirring rods of the desulfurization stirring head.

3. The heat preservation device of the desulfurization stirring head according to any one of claims 1-2, characterized in that, It further includes a vertical support structure. The vertical support structure includes a vertical rod and a base. The driving frame is connected to the vertical rod, and the lower end of the vertical rod is fixed on the base.

4. The heat preservation device of the desulfurization stirring head according to claim 3, wherein, The vertical rod is a lifting mechanism. The lifting mechanism is connected to the driving frame and drives the driving frame to lift; the lifting mechanism is any one of a telescopic cylinder, a chain lifting mechanism, a gear lifting mechanism, and a lead screw lifting mechanism.

5. The heat preservation device of the desulfurization stirring head according to claim 3, characterized in that, A heating structure is arranged inside the heat preservation cover.

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