Visual energy-saving type molten iron groove liquid level heat preservation device and using method thereof

Abstract

The invention relates to the technical field of ironmaking energy conservation and emission reduction equipment, and particularly discloses a visual energy-saving type molten iron groove liquid level heat preservation device and a using method thereof.The visual energy-saving type molten iron groove liquid level heat preservation device comprises a visual cover plate, a hanging rod, a heat preservation plate and a hydraulic lifting device, and the visual cover plate comprises a steel plate frame, glass, a hydraulic positioning groove and an upper hanging hook; the insulation board comprises a refractory shell and a lower suspension hook, and the hydraulic lifting device comprises a hydraulic column and an electric appliance hydraulic control system; glass is embedded in the middle of the steel plate frame, a hydraulic positioning groove is formed in the bottom of the steel plate frame, an upper suspension hook is arranged at the bottom of the steel plate frame, the upper end of the suspension rod is fixed to the upper suspension hook in the working state, the lower end of the suspension rod is fixed to a lower suspension hook, and the lower suspension hook is installed on the top of the fireproof shell. The maintenance time of the molten iron trough and the device is shortened, the working intensity of replacing the heat preservation plate is relieved, the use amount of refractory materials of the heat preservation plate is reduced, the service life of the refractory materials is prolonged, and the device has the advantages of being visualized and easy to operate and maintain.

Description

Technical Field

[0001] The present invention relates to the technical field of ironmaking energy-saving and emission-reduction equipment, and in particular to a visual energy-saving iron ditch liquid surface insulation device and a method for using the device. Background Art

[0002] The iron ditch is a crucial feature of the blast furnace. It serves as the channel for molten iron to flow into the ladle after the hot iron-slag mixture is separated from the furnace. The tapping temperature in a blast furnace is typically above 1500°C to ensure good fluidity and meet the required temperature for the steelmaking process. To minimize heat loss and temperature drop caused by thermal radiation from the high-temperature molten iron surface, most steel mills install a cover plate above the iron ditch. This cover plate typically consists of a 2cm thick layer of ordinary steel plate and a 20cm thick layer of refractory material, providing insulation, safety, and load-bearing properties.

[0003] The iron ditch is generally rebuilt every 60 days. During construction, the cover plate needs to be removed and then replaced after the construction is complete. This cover plate is too thick and heavy, and both its removal and replacement require manual crane operations, which is extremely time-consuming and labor-intensive. Due to the different materials of the steel plate layer and the refractory material layer of the cover plate, they shrink and expand to different degrees during repeated heating and cooling. During the lifting operations of removal and replacement, they are inevitably bumped and bumped, which can easily cause the refractory material layer to crack, fall off, lose corners, and partially fall off from the steel plate, seriously affecting the service life and thermal insulation effect of the cover plate. This cover plate has no observation function, so the detachment of the refractory material layer cannot be discovered in time, and the refractory material layer cannot be repaired in time. In addition, the cover plate is generally about 1 meter away from the molten iron liquid surface, which has poor thermal insulation effect. The surface temperature of the cover plate is over 100°C, posing a safety risk to workers.

[0004] Therefore, in order to improve the insulation and maintenance performance of the iron ditch cover and extend the service life of the refractory material, it is necessary to develop a visual energy-saving iron ditch liquid surface insulation device and its use method to solve the problems of the existing iron ditch cover, such as time-consuming and labor-intensive maintenance, lack of visibility, short life of the refractory material, poor insulation effect, and certain safety hazards. Summary of the Invention

[0005] In response to the problems existing in the prior art, the purpose of the present invention is to provide a visual energy-saving iron trough liquid level insulation device and its use method, which has the characteristics of visualization, easy operation, easy repair and maintenance, and long service life of refractory materials.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a visual energy-saving iron water ditch liquid level insulation device, including a visual cover plate, a hanging rod, an insulation plate and a hydraulic lifting device, the visual cover plate includes a steel plate frame, glass, a hydraulic positioning groove and an upper hanging hook, the insulation plate includes a refractory shell and a lower hanging hook, and the hydraulic lifting device includes a hydraulic column and an electrical hydraulic control system;

[0007] Glass is inlaid in the middle of the steel plate frame, a hydraulic positioning groove is provided at the bottom of the steel plate frame, an upper suspension hook is provided at the bottom of the steel plate frame, the upper end of the suspension rod is fixed to the upper suspension hook when in working state, and the lower end of the suspension rod is fixed to the lower suspension hook, which is installed on the top of the fire-resistant shell.

[0008] Specifically, the steel plate frame is welded from common steel plates with a thickness of 2cm-3cm, and glass is installed at a position along the central axis of the steel plate frame along the iron ditch.

[0009] Specifically, the glass is 2cm-3cm thick tempered laminated glass, the width of the glass is 10cm-30cm smaller than the width of the iron ditch, and the length of the glass is 20cm-60cm smaller than the length of the steel plate frame.

[0010] Specifically, the hydraulic positioning groove is embedded in the top of the hydraulic column, and the hydraulic positioning groove is used to position the visualization cover plate on the hydraulic column.

[0011] Specifically, the upper hanging hook and the lower hanging hook have the same width, the inner diameter of the upper hanging hook and the lower hanging hook is 0.5cm-1cm larger than the diameter of the hanging rod, the upper hanging hook and the lower hanging hook are hooked at both ends of the hanging rod respectively, and the middle part of the hanging rod is made of steel bars with a diameter of φ2cm-3cm to form a rectangular structure, and the inner width of the hanging rod is 1cm-2cm larger than the upper hanging hook.

[0012] Specifically, four lifting ears are provided on the top of the steel plate frame, and the lifting ears are evenly distributed at the four corners of the steel plate frame. The lifting ears are foldable and are erected for driving and unhooking.

[0013] Specifically, a plurality of the insulation boards are laid under the same visual cover board, and the width of the insulation boards is 30 cm to 50 cm.

[0014] Specifically, the refractory shell is cast from a ceramic material resistant to 1500 degrees Celsius, the thickness of the refractory shell is 3cm-10cm, and the interior of the refractory shell is filled with a refractory material, which is a fibrous refractory material;

[0015] A 0.5cm-1cm thick fibrous refractory material is installed in the iron water channel at the position of the insulation board to prevent bumps and seal.

[0016] Specifically, the hydraulic lifting device is fixed on both sides of the iron ditch channel. Each visualization cover plate corresponds to a set of hydraulic lifting devices. Each set of hydraulic lifting devices has four hydraulic columns. When the hydraulic columns are lowered to the lowest position, the tops of the hydraulic columns must be 1cm-2cm lower than the lower surface of the visualization steel plate.

[0017] A method for using a visual energy-saving iron ditch liquid surface insulation device comprises the following steps:

[0018] S1. Use a crane to place the visualization cover in the designated position, place the hydraulic positioning groove of the visualization cover above the hydraulic column, and drop it down, removing the crane hook;

[0019] S2. Start the hydraulic lifting device to raise the hydraulic column to a suitable height, stop the hydraulic lifting device, hang the upper end of the suspension rod on the upper suspension hook, and hang the insulation board on the lower end of the suspension rod;

[0020] S3. Start the hydraulic lifting device lowering program, lower the hydraulic column to the lowest position, stop the hydraulic lifting device, and visualize the cover plate falling to the designated position on the ground, and the insulation plate falling on the iron ditch channel;

[0021] S4. When the insulation board is observed to be cracked through the visual cover and the damaged insulation board needs to be replaced, the hydraulic lifting device is started to raise the hydraulic column to a suitable height, the hydraulic lifting device is stopped, and the damaged insulation board is replaced, and steps S1 to S3 are repeated;

[0022] S5. When the iron ditch needs to be overhauled, start the hydraulic lifting device rising program to raise the hydraulic column to the highest position. After the maintenance is completed, repeat steps S1 to S3.

[0023] The present invention has the following beneficial effects:

[0024] The present invention designs a visual, energy-saving, iron ditch liquid surface insulation device and its use method. The addition of a hydraulic system allows for rapid raising and lowering of the device and replacement of the insulation board. The hydraulic height design, exceeding 2.5 meters, allows for raising the device without interfering with ground crews' work on the iron ditch, significantly reducing the time required for repair and maintenance of the ditch and the device. The introduction of a visual cover facilitates observation of the insulation board's operation and allows for timely replacement of damaged insulation boards. The design of splitting the insulation board into small pieces helps reduce the workload of replacing the insulation board, reduces the amount of refractory material used for the insulation board, and extends the service life of the refractory material. The insulation board is placed on the iron ditch channel, which reduces the distance between the refractory material and the molten iron surface compared to existing cover plates, thereby reducing the loss of sensible heat from the molten iron. The filling of the insulation board with fiber refractory material effectively prevents the spread of sensible heat from the molten iron. In summary, the device is visual, easy to operate, easy to repair and maintain, and has a long service life for the refractory material. After application, heat loss from the molten iron surface is significantly reduced, the molten iron temperature is increased, and significant economic benefits are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the assembly structure of a visual energy-saving iron ditch liquid surface insulation device.

[0026] Figure 2 This is the main view of the visualization cover.

[0027] Figure 3 It is a cross-sectional view of the insulation board.

[0028] In the figure: 1-visualization cover, 11-steel plate frame, 12-glass, 13-hydraulic positioning groove, 14-upper hanging hook, 15-hanging ear; 2-hanging rod; 3-insulation board, 31-refractory shell, 32-refractory material, 33-lower hanging hook; 4-hydraulic lifting device, 41-hydraulic column, 42-electrical hydraulic control system. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely further describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] like Figure 1-Figure 3 As shown, a visual energy-saving iron water ditch liquid surface insulation device and its use method include the following embodiments.

[0031] Example 1:

[0032] The present invention provides a visual energy-saving iron ditch liquid level insulation device, comprising: a visual cover plate 1, a hanging rod 2, an insulation plate 3 and a hydraulic lifting device 4, wherein the visual cover plate 1 is composed of a steel plate frame 11, glass 12, a hydraulic positioning groove 13, an upper hanging hook 14, and a lifting lug 15, the insulation plate 3 is composed of a refractory shell 31, refractory material 32 and a lower hanging hook 33, and the hydraulic lifting device 4 is composed of a hydraulic column 41 and an electrical hydraulic control system 42. The glass 12 is inlaid in the middle position of the steel plate frame 11, hydraulic positioning grooves 13 are provided below both sides of the steel plate frame 11, an upper hanging hook 14 is provided below the steel plate frame 11, and a lifting lug 15 is provided above the steel plate frame 11. In the working state, the upper end of the hanging rod 2 is fixed to the upper hanging hook 14, and the lower end is fixed to the lower hanging hook 31. The refractory material 32 is filled in the interior of the refractory shell 31, and a lower hanging hook 33 is provided above both ends of the refractory shell 31.

[0033] The steel plate frame 11 is welded by the common steel plate of 2cm thickness. The steel plate frame 11 is provided with the installation glass 12 along the iron ditch toward the central axis position.

[0034] The glass 12 is made of 2cm thick tempered laminated glass, which has good load-bearing capacity and suitable heat resistance. The width of the glass 12 is 10cm-30cm smaller than the width of the iron ditch, and the length of the glass 12 is 20cm-60cm smaller than the length of the steel plate frame 11.

[0035] The hydraulic positioning groove 13 is used to position the visualization cover plate 1 on the hydraulic column 41 to ensure the safety of the visualization cover plate 1 when it is raised or lowered.

[0036] The upper hanging hook 14 is as wide as the lower hanging hook 33, and its inner diameter is 0.5cm larger than the diameter of the suspension rod 2.

[0037] There are 4 lifting ears on each visualization cover plate, evenly distributed at the four corners of the visualization cover plate 1. The lifting ears 15 are foldable with a pin structure. When used, they are erected to facilitate unhooking and when not used, they are laid down to reduce the impact on workers' daily work and walking.

[0038] The suspension rod 2 is made with the steel bar of φ 2cm, and is rectangular, and the inner width is 1cm larger than the upper hanging hook 14.

[0039] A plurality of insulation boards 3 are evenly laid under a visual cover plate. The width of the insulation boards 3 is more suitable to be 30 cm. The weight is relatively light and it is easy to replace.

[0040] The fire-resistant shell 31 is cast from a ceramic material that can withstand temperatures of 1500 degrees Celsius, and has a thickness of 3 cm.

[0041] The refractory material 32 is a fibrous refractory material filled in the interior of the refractory shell 31 , which not only plays a heat insulation role but also reduces the weight of the insulation board 3 .

[0042] The hydraulic lifting devices 4 are fixed on both sides of the iron ditch channel. Each visualization cover plate corresponds to one set of hydraulic lifting devices, and each set of hydraulic lifting devices 4 has four hydraulic columns 41.

[0043] When the hydraulic column 41 is lowered to the lowest point, the column is 1 cm lower than the lower surface of the visual steel plate 1. The hydraulic column 41 adopts the existing four-stage lifting column and can be raised to more than 2.5 meters to facilitate workers' maintenance. The electrical hydraulic control system 42 adopts a motor-driven hydraulic pump.

[0044] In addition, a 0.5 cm thick refractory material 32 is installed at the location where the insulation board 3 is placed in the iron ditch channel to prevent impact and collision and to provide sealing.

[0045] The present invention provides a method for using a visual energy-saving iron trough liquid level insulation device, which specifically comprises the following steps:

[0046] Step 1: Use a crane to place the visualization cover 1 at the designated location, place the hydraulic positioning groove 13 of the visualization cover 1 above the hydraulic column 41, and drop it, and remove the crane hook.

[0047] Step 2: Start the hydraulic lifting device 4 rising program, raise the hydraulic column 41 to a suitable height, and stop the hydraulic lifting device 4. Hang the upper end of the suspension rod 2 on the upper hanging hook 14, and hang the insulation board 3 on the lower end of the suspension rod 2.

[0048] Step 3: Start the descending program of the hydraulic lifting device 4, lower the hydraulic column 41 to the lowest position, and stop the hydraulic lifting device 4. The visual cover 1 falls to the designated position on the ground, and the insulation board falls on the iron ditch channel.

[0049] Step 4: When the insulation board 3 is observed to be cracked through the visual cover, if the damaged insulation board 3 needs to be replaced, start the hydraulic lifting device 4 to raise the hydraulic column 41 to the appropriate height, and stop the hydraulic lifting device 4. After replacing the damaged insulation board 3, repeat steps 1 to 3.

[0050] Step 5: When the iron trough needs to be overhauled, start the hydraulic lifting device 4 rising program to raise the hydraulic column 41 to the highest position. After the overhaul is completed, repeat steps 1 to 3.

[0051] The advantages of this embodiment are: the addition of a hydraulic system can quickly complete the lifting, lowering and replacement of the device and the replacement of the insulation board. The hydraulic height design of more than 2.5m satisfies the need to raise the device without affecting the construction of the iron ditch by ground workers, greatly reducing the repair and maintenance time of the iron ditch and the device. The introduction of a visual cover makes it easy to observe the operation of the insulation board and replace damaged insulation boards in time; the design of splitting the insulation board into small pieces helps to reduce the workload of replacing the insulation board, reduce the amount of refractory materials used in the insulation board, and extend the service life of the refractory materials. The insulation board is placed on the iron ditch channel, which reduces the distance between the refractory material and the molten iron liquid surface compared to the existing cover plate, which helps to reduce the loss of sensible heat of the molten iron. The filling of fiber refractory materials inside the insulation board can effectively prevent the spread of sensible heat of the molten iron. In short, the device has the characteristics of visualization, easy operation, easy maintenance, and long service life of refractory materials. After application, the heat loss of the molten iron surface is reduced by 20%, and the molten iron temperature is increased by 3°C. The annual economic benefit of a plant with an annual output of 2 million tons of molten iron is 6 million to 9 million yuan.

[0052] Example 2:

[0053] The present invention provides a visual energy-saving iron ditch liquid level insulation device, comprising: a visual cover plate 1, a hanging rod 2, an insulation plate 3 and a hydraulic lifting device 4, wherein the visual cover plate 1 is composed of a steel plate frame 11, glass 12, a hydraulic positioning groove 13, an upper hanging hook 14, and a lifting lug 15, the insulation plate 3 is composed of a refractory shell 31, refractory material 32 and a lower hanging hook 33, and the hydraulic lifting device 4 is composed of a hydraulic column 41 and an electrical hydraulic control system 42. The glass 12 is inlaid in the middle position of the steel plate frame 11, hydraulic positioning grooves 13 are provided below both sides of the steel plate frame 11, an upper hanging hook 14 is provided below the steel plate frame 11, and a lifting lug 15 is provided above the steel plate frame 11. In the working state, the upper end of the hanging rod 2 is fixed to the upper hanging hook 14, and the lower end is fixed to the lower hanging hook 31. The refractory material 32 is filled in the interior of the refractory shell 31, and a lower hanging hook 33 is provided above both ends of the refractory shell 31.

[0054] The steel plate frame 11 is welded by the common steel plate of 2.5cm thickness. The steel plate frame 11 is arranged to install glass 12 along the iron ditch toward the central axis position.

[0055] The glass 12 is made of 2.5cm thick tempered laminated glass, which has good load-bearing capacity and suitable heat resistance. The width of the glass 12 is less than 20cm of the working width of the iron ditch, and the length is less than 40cm of the iron plate frame.

[0056] The hydraulic positioning groove 13 is used to position the visualization cover plate 1 on the hydraulic column 41 to ensure the safety of the visualization cover plate 1 when it is raised or lowered.

[0057] The upper hanging hook 14 is as wide as the lower hanging hook 33, and its inner diameter is 0.5cm larger than the diameter of the suspension rod 2.

[0058] Each visual cover has four lifting lugs, evenly distributed at the four corners. They are foldable with a pin structure. They can be erected for easy unhooking and folded down to minimize disruption to workers' daily work.

[0059] The suspension rod 2 is made with the steel bar of φ 2.5cm, and is rectangular, and the inner width is 1cm larger than the upper hanging hook 14.

[0060] A plurality of insulation boards 3 are evenly laid under a visual cover plate. The width of the insulation board 3 is more appropriate to be 40 cm. The weight is relatively light and it is easy to replace.

[0061] The fire-resistant shell 31 is cast from a ceramic material that can withstand temperatures of 1500 degrees Celsius, and has a thickness of 7 cm.

[0062] The refractory material 32 is a fibrous refractory material filled in the interior of the refractory shell 31 , which not only plays a heat insulation role but also reduces the weight of the insulation board 3 .

[0063] The hydraulic lifting devices 4 are fixed on both sides of the iron ditch channel. Each visualization cover plate corresponds to one set of hydraulic lifting devices, and each set of hydraulic lifting devices 4 has four hydraulic columns 41.

[0064] When the hydraulic column 41 is lowered to the lowest point, the column is 2 cm lower than the lower surface of the visual steel plate 1. The hydraulic column 41 adopts the existing four-stage lifting column and can be raised to more than 2.5 m, which is convenient for workers to inspect and repair. The electrical hydraulic control system 42 adopts a motor-driven hydraulic pump.

[0065] In addition, a 1 cm thick refractory material 32 is installed at the location where the insulation board 3 is placed in the iron ditch channel to prevent impact and collision and to provide sealing.

[0066] The present invention provides a method for using a visual energy-saving iron trough liquid level insulation device, which specifically comprises the following steps:

[0067] Step 1: Use a crane to place the visualization cover 1 at the designated location, place the hydraulic positioning groove 13 of the visualization cover 1 above the hydraulic column 41, and drop it, and remove the crane hook.

[0068] Step 2: Start the hydraulic lifting device 4 rising program, raise the hydraulic column 41 to a suitable height, and stop the hydraulic lifting device 4. Hang the upper end of the suspension rod 2 on the upper hanging hook 14, and hang the insulation board 3 on the lower end of the suspension rod 2.

[0069] Step 3: Start the descending program of the hydraulic lifting device 4, lower the hydraulic column 41 to the lowest position, and stop the hydraulic lifting device 4. The visual cover 1 falls to the designated position on the ground, and the insulation board falls on the iron ditch channel.

[0070] Step 4: When the insulation board 3 is observed to be cracked through the visual cover, if the damaged insulation board 3 needs to be replaced, start the hydraulic lifting device 4 to raise the hydraulic column 41 to the appropriate height, and stop the hydraulic lifting device 4. After replacing the damaged insulation board 3, repeat steps 1 to 3.

[0071] Step 5: When the iron trough needs to be overhauled, start the hydraulic lifting device 4 rising program to raise the hydraulic column 41 to the highest position. After the overhaul is completed, repeat steps 1 to 3.

[0072] The advantages of this embodiment are: the addition of a hydraulic system can quickly complete the lifting, lowering and replacement of the device and the replacement of the insulation board. The hydraulic height design of more than 2.5m satisfies the need to raise the device without affecting the construction of the iron ditch by ground workers, greatly reducing the repair and maintenance time of the iron ditch and the device. The introduction of a visual cover makes it easy to observe the operation of the insulation board and replace damaged insulation boards in time; the design of splitting the insulation board into small pieces helps to reduce the workload of replacing the insulation board, reduce the amount of refractory materials used in the insulation board, and extend the service life of the refractory materials. The insulation board is placed on the iron ditch channel, which reduces the distance between the refractory material and the molten iron liquid surface compared to the existing cover plate, which helps to reduce the loss of sensible heat of the molten iron. The filling of fiber refractory materials inside the insulation board can effectively prevent the spread of sensible heat of the molten iron. In short, the device has the characteristics of visualization, easy operation, easy maintenance, and long service life of refractory materials. After application, the heat loss of the molten iron surface is reduced by 30%, and the molten iron temperature is increased by 4°C. The annual economic benefit of a plant with an annual output of 2 million tons of molten iron is 8 million to 12 million yuan.

[0073] Example 3:

[0074] The present invention provides a visual energy-saving iron ditch liquid level insulation device, comprising: a visual cover plate 1, a hanging rod 2, an insulation plate 3 and a hydraulic lifting device 4, wherein the visual cover plate 1 is composed of a steel plate frame 11, glass 12, a hydraulic positioning groove 13, an upper hanging hook 14, and a lifting lug 15, the insulation plate 3 is composed of a refractory shell 31, refractory material 32 and a lower hanging hook 33, and the hydraulic lifting device 4 is composed of a hydraulic column 41 and an electrical hydraulic control system 42. The glass 12 is inlaid in the middle position of the steel plate frame 11, hydraulic positioning grooves 13 are provided below both sides of the steel plate frame 11, an upper hanging hook 14 is provided below the steel plate frame 11, and a lifting lug 15 is provided above the steel plate frame 11. In the working state, the upper end of the hanging rod 2 is fixed to the upper hanging hook 14, and the lower end is fixed to the lower hanging hook 31. The refractory material 32 is filled in the interior of the refractory shell 31, and a lower hanging hook 33 is provided above both ends of the refractory shell 31.

[0075] The steel plate frame 11 is welded by the common steel plate of 3cm thickness. The steel plate frame 11 is arranged to install glass 12 along the iron ditch toward the central axis position.

[0076] The glass 12 is made of 3cm thick tempered laminated glass, which has good load-bearing capacity and suitable heat resistance. The width of the glass 12 is less than 30cm of the working width of the iron ditch, and the length is less than 60cm of the iron plate frame.

[0077] The hydraulic positioning groove 13 is used to position the visualization cover plate 1 on the hydraulic column 41 to ensure the safety of the visualization cover plate 1 when it is raised or lowered.

[0078] The upper hanging hook 14 is as wide as the lower hanging hook 33, and its inner diameter is 1 cm larger than the diameter of the suspension rod 2.

[0079] Each visual cover has four lifting lugs, evenly distributed at the four corners. They are foldable with a pin structure. They can be erected for easy unhooking and folded down to minimize disruption to workers' daily work.

[0080] The suspension rod 2 is made with the steel bar of φ 3cm, and is rectangular, and the inner width is 2cm larger than the upper hanging hook 14.

[0081] A plurality of insulation boards 3 are evenly laid under a visual cover plate. The width of the insulation boards 3 is more suitable to be 50 cm. The weight is relatively light and it is easy to replace.

[0082] The fire-resistant shell 31 is cast from a ceramic material that can withstand temperatures of 1500 degrees Celsius, and has a thickness of 10 cm.

[0083] The refractory material 32 is a fibrous refractory material filled in the interior of the refractory shell 31 , which not only plays a heat insulation role but also reduces the weight of the insulation board 3 .

[0084] The hydraulic lifting devices 4 are fixed on both sides of the iron ditch channel. Each visualization cover plate corresponds to one set of hydraulic lifting devices, and each set of hydraulic lifting devices 4 has four hydraulic columns 41.

[0085] When the hydraulic column 41 is lowered to the lowest point, the column is 2 cm lower than the lower surface of the visual steel plate 1. The hydraulic column 41 adopts the existing four-stage lifting column and can be raised to more than 2.5 m, which is convenient for workers to inspect and repair. The electrical hydraulic control system 42 adopts a motor-driven hydraulic pump.

[0086] In addition, a 1 cm thick refractory material 32 is installed at the location where the insulation board 3 is placed in the iron ditch channel to prevent impact and collision and to provide sealing.

[0087] The present invention provides a method for using a visual energy-saving iron trough liquid level insulation device, which specifically comprises the following steps:

[0088] Step 1: Use a crane to place the visualization cover 1 at the designated location, place the hydraulic positioning groove 13 of the visualization cover 1 above the hydraulic column 41, and drop it, and remove the crane hook.

[0089] Step 2: Start the hydraulic lifting device 4 rising program, raise the hydraulic column 41 to a suitable height, and stop the hydraulic lifting device 4. Hang the upper end of the suspension rod 2 on the upper hanging hook 14, and hang the insulation board 3 on the lower end of the suspension rod 2.

[0090] Step 3: Start the descending program of the hydraulic lifting device 4, lower the hydraulic column 41 to the lowest position, and stop the hydraulic lifting device 4. The visual cover 1 falls to the designated position on the ground, and the insulation board falls on the iron ditch channel.

[0091] Step 4: When the insulation board 3 is observed to be cracked through the visual cover, if the damaged insulation board 3 needs to be replaced, start the hydraulic lifting device 4 to raise the hydraulic column 41 to the appropriate height, and stop the hydraulic lifting device 4. After replacing the damaged insulation board 3, repeat steps 1 to 3.

[0092] Step 5: When the iron trough needs to be overhauled, start the hydraulic lifting device 4 rising program to raise the hydraulic column 41 to the highest position. After the overhaul is completed, repeat steps 1 to 3.

[0093] The advantages of this embodiment are: the addition of a hydraulic system can quickly complete the lifting, lowering and replacement of the device and the replacement of the insulation board. The hydraulic height design of more than 2.5m satisfies the need to raise the device without affecting the construction of the iron ditch by ground workers, greatly reducing the repair and maintenance time of the iron ditch and the device. The introduction of a visual cover makes it easy to observe the operation of the insulation board and replace damaged insulation boards in time; the design of splitting the insulation board into small pieces helps to reduce the workload of replacing the insulation board, reduce the amount of refractory materials used in the insulation board, and extend the service life of the refractory materials. The insulation board is placed on the iron ditch channel, which reduces the distance between the refractory material and the molten iron liquid surface compared to the existing cover plate, which helps to reduce the loss of sensible heat of the molten iron. The filling of fiber refractory materials inside the insulation board can effectively prevent the spread of sensible heat of the molten iron. In short, the device has the characteristics of visualization, easy operation, easy maintenance, and long service life of refractory materials. After application, the heat loss of the molten iron surface is reduced by 40%, and the molten iron temperature is increased by 5°C. The annual economic benefit of a plant with an annual output of 2 million tons of molten iron is 10 million to 15 million yuan.

[0094] The present invention is not limited to the above-mentioned embodiments. Anyone should be aware that any structural changes made under the guidance of the present invention, and any technical solutions that are the same or similar to those of the present invention, fall within the scope of protection of the present invention.

[0095] The technology, shape, and structure not described in detail in the present invention are all well-known technologies.

Claims

1. A visual energy-saving iron trough liquid level insulation device, characterized in that: The invention comprises a visualization cover plate (1), a hanging rod (2), a heat-insulating plate (3) and a hydraulic lifting device (4); the visualization cover plate (1) comprises a steel plate frame (11), glass (12), a hydraulic positioning groove (13) and an upper hanging hook (14); the heat-insulating plate (3) comprises a fire-resistant shell (31) and a lower hanging hook (33); and the hydraulic lifting device (4) comprises a hydraulic column (41) and an electrical hydraulic control system (42); A glass (12) is inlaid in the middle of the steel plate frame (11), a hydraulic positioning groove (13) is provided at the bottom of the steel plate frame (11), an upper hanging hook (14) is provided at the bottom of the steel plate frame (11), the upper end of the hanging rod (2) is fixed to the upper hanging hook (14) in the working state, and the lower end of the hanging rod (2) is fixed to the lower hanging hook (33), and the lower hanging hook (33) is installed on the top of the fire-resistant shell (31).

2. The visual energy-saving iron ditch liquid level insulation device according to claim 1 is characterized in that: The steel plate frame (11) is welded from common steel plates with a thickness of 2cm-3cm. The steel plate frame (11) is provided with a glass installation (12) at a central axis position along the iron water ditch.

3. The visual energy-saving iron ditch liquid level insulation device according to claim 1 is characterized in that: The glass (12) is a 2cm-3cm thick tempered laminated glass. The width of the glass (12) is 10cm-30cm smaller than the width of the iron ditch. The length of the glass (12) is 20cm-60cm smaller than the length of the steel plate frame (11).

4. The visual energy-saving iron ditch liquid level insulation device according to claim 1 is characterized in that: The hydraulic positioning groove (13) is embedded in the top of the hydraulic column (41), and the hydraulic positioning groove (13) is used to position the visualization cover plate (1) on the hydraulic column (41).

5. The visual energy-saving iron ditch liquid level insulation device according to claim 1 is characterized in that: The upper hanging hook (14) and the lower hanging hook (33) have the same width, the inner diameters of the upper hanging hook (14) and the lower hanging hook (33) are 0.5cm-1cm larger than the diameter of the hanging rod (2), the two ends of the hanging rod (2) are respectively hooked with the upper hanging hook (14) and the lower hanging hook (33), the middle part of the hanging rod (2) is made of a rectangular structure with a steel bar with a diameter of φ2cm-3cm, and the inner width of the hanging rod (2) is 1cm-2cm larger than the upper hanging hook (14).

6. The visualized energy-saving iron ditch liquid level insulation device according to claim 1 is characterized in that: The top of the steel plate frame (11) is provided with four lifting lugs (15), which are evenly distributed at the four corners of the steel plate frame (11). The lifting lugs (15) are foldable and are erected for unhooking during driving.

7. The visual energy-saving iron ditch liquid level insulation device according to claim 1 is characterized in that: The insulation boards (3) are provided with a plurality of panels laid under the same visual cover (1), and the width of the insulation boards (3) is 30 cm to 50 cm.

8. The visualized energy-saving iron ditch liquid level insulation device according to claim 1 is characterized in that: The refractory shell (31) is cast from a ceramic material resistant to 1500 degrees Celsius. The thickness of the refractory shell (31) is 3 cm to 10 cm. The interior of the refractory shell (31) is filled with a refractory material (32). The refractory material (32) is a fibrous refractory material. A 0.5cm-1cm thick refractory material (32) is installed at the iron water channel at the position of the insulation board (3).

9. The visualized energy-saving iron ditch liquid level insulation device according to claim 1 is characterized in that: The hydraulic lifting device (4) is fixed on both sides of the iron ditch channel. Each visualization cover plate (1) corresponds to a set of hydraulic lifting devices (4). Each set of hydraulic lifting devices (4) has four hydraulic columns (41). When the hydraulic columns (41) are lowered to the lowest position, the top of the hydraulic columns (41) is 1 cm to 2 cm lower than the lower surface of the visualization steel plate (1).

10. The method for using the visualized energy-saving iron ditch liquid level insulation device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Use a crane to place the visualization cover (1) at a designated location, place the hydraulic positioning groove (13) of the visualization cover (1) above the hydraulic column (41), and drop it down, and remove the crane hook; S2, start the hydraulic lifting device (4) rising program, raise the hydraulic column (41) to a suitable height, stop the hydraulic lifting device (4), hang the upper end of the suspension rod (2) on the upper suspension hook (14), and hang the insulation board (3) on the lower end of the suspension rod (2); S3, start the hydraulic lifting device (4) descending program, lower the hydraulic column (41) to the lowest position, stop the hydraulic lifting device (4), the visual cover plate (1) falls to the designated position on the ground, and the insulation plate (3) falls on the iron ditch channel; S4, when the insulation board (3) is observed to be broken through the visual cover (1), when the broken insulation board (3) needs to be replaced, the hydraulic lifting device (4) is started to rise, the hydraulic column (41) is raised to a suitable height, the hydraulic lifting device (4) is stopped, the broken insulation board (3) is replaced, and steps S1 to S3 are repeated; S5. When the iron trough needs to be overhauled, the hydraulic lifting device (4) is started to raise the hydraulic column (41) to the highest position. After the overhaul is completed, steps S1 to S3 are repeated.

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