A silicon steel cooling type continuous magnesium coating device

Abstract

The utility model discloses a kind of silicon steel cooling type continuous magnesium coating devices, including rack, first direction is along silicon steel advancing direction, cooling roll and coating roller group are sequentially arranged on rack along first direction;Low-temperature storage tank is provided on rack, low-temperature storage tank is connected with material conveying pipeline, material conveying pipeline is sequentially connected cooling roll and coating roller group, cooling roll has the heat exchange passage through along axial direction, material conveying pipeline is set through heat exchange passage.This utility model is cooled to the silicon steel before coating by cooling roll, to reduce the heat exchange between silicon steel and magnesium oxide slurry, keep the low-temperature state of magnesium oxide slurry when coating, prevent slurry early reaction, reduce volatilization, maintain uniformity, avoid silicon steel performance is influenced, guarantee coating quality.

Description

Technical Field

[0001] This utility model belongs to the field of silicon steel coating technology, and in particular relates to a silicon steel cooling continuous magnesium coating device. Background Technology

[0002] Magnesium oxide coating is a crucial process in silicon steel production. It prevents silicon steel sheets from sticking together during high-temperature annealing and helps form regular atomic orientations. It can also react with silicon dioxide on the silicon steel surface to form an insulating layer, reducing eddy current losses. Furthermore, it can purify impurities, improve the microstructure, and enhance corrosion resistance, which is of great significance for improving the magnetic properties and overall quality of silicon steel.

[0003] When magnesium oxide slurry is applied to silicon steel, it needs to be kept at a low temperature. However, since the silicon steel entering the coating is at room temperature, the temperature of the magnesium oxide slurry will rise rapidly when it is applied to the silicon steel, affecting the formation of a good isolation and insulation layer on the silicon steel surface.

[0004] Therefore, it is necessary to improve the existing magnesium coating devices. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the existing technology and provide a silicon steel cooling continuous magnesium coating device, which improves the stability of temperature control of magnesium oxide slurry.

[0006] To achieve the above objectives, the specific technical solution of the silicon steel cooling continuous magnesium coating device of this utility model is as follows: A silicon steel cooling type continuous magnesium coating device, comprising: The frame has a first direction along the direction in which silicon steel is moved, and cooling rollers and coating rollers are sequentially arranged on the frame along the first direction. The frame is equipped with a low-temperature storage tank, which is connected to a conveying pipeline. The conveying pipeline is connected in sequence to the cooling roller and the coating roller assembly. The cooling roller has a heat exchange channel that runs through the axial direction, and the conveying pipeline passes through the heat exchange channel.

[0007] Preferably, the coating roller assembly includes a lower coating roller and an upper coating roller that are horizontally rotatably mounted on the frame. The upper coating roller is vertically mounted above the lower coating roller. A collection trough is provided directly below the lower coating roller. A coating head is provided in front of the upper coating roller along a first direction.

[0008] Preferably, the conveying pipeline includes a branch pipe, a heat exchange pipe, and a collector pipe connected end to end in sequence. The branch pipe is connected to the low-temperature storage tank and is equipped with a power pump. The collector pipe is connected to the coating head. The heat exchange pipe is located inside the heat exchange channel and has an S-shaped or spiral structure.

[0009] Preferably, multiple coating heads are arranged at equal intervals along the axial direction of the upper coating roller.

[0010] Preferably, the projections of the upper coating roller, the lower coating roller, and each coating head along the vertical direction onto the collection trough all fall within the top opening range of the collection trough.

[0011] Preferably, the bottom of the collection tank is connected to the low-temperature storage tank via a return pipe, and a valve is provided on the return pipe.

[0012] Preferably, the cooling roller is parallel to the lower coating roller, and multiple cooling rollers are arranged along the first direction.

[0013] Preferably, the frame is provided with an open-top insulated box, the cooling roller is located inside the insulated box, and an insulated cover is detachably connected to the frame. The insulated cover is placed over the top opening of the insulated box, and there is a gap between the insulated cover and the insulated box that allows the silicon steel to pass through.

[0014] Preferably, the cooling roller includes a tubular roller body, both ends of which are sealed with end caps, and a tubular support shaft is fixedly connected to the end caps, the support shaft being coaxially arranged with the roller body.

[0015] Preferably, the outer circumference of the roller body is provided with an annular groove, and a heat-conducting rubber sleeve is provided inside the annular groove.

[0016] The silicon steel cooling continuous magnesium coating device of this utility model has the following advantages: the silicon steel is cooled before coating by cooling rollers to reduce the heat exchange between silicon steel and magnesium oxide slurry, maintain the low temperature of magnesium oxide slurry during coating, prevent premature reaction of slurry, reduce volatilization, maintain uniformity, avoid affecting the performance of silicon steel, and ensure coating quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the magnesium coating device of this utility model; Figure 2 This is a schematic diagram of the installation structure of the cooling roller of this utility model; Figure 3 This is a schematic diagram of the structure of the cooling roller of this utility model; Figure 4 This is an exploded structural diagram of the cooling roller of this utility model; Figure 5 This is a cross-sectional view of the cooling roller of this utility model; The markings in the diagram are as follows: 1. Frame; 2. Collection tank; 3. Lower coating roller; 4. Upper coating roller; 6. Cooling roller; 601. Thermal conductive rubber sleeve; 602. End cap; 603. Support shaft; 604. Roller body; 605. Annular groove; 701. Insulation cover; 702. Insulation box; 901. Low temperature storage box; 902. Power pump; 903. Diverter pipe; 904. Collector pipe; 905. Coating head; 906. Return pipe; 907. Heat exchanger pipe. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0019] The terms "top surface," "bottom surface," and "full surface" are used with reference to the normal operating state of the magnesium coating device and are only for the convenience of describing this utility model and simplifying the description. They are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] like Figure 1 and 2 As shown, a silicon steel cooling continuous magnesium coating device includes a frame 1, with the silicon steel advancing direction as the first direction. Cooling rollers 6 and coating roller groups are sequentially arranged on the frame 1 along the first direction. A low-temperature storage tank 901 is provided on the frame 1, and the low-temperature storage tank 901 is connected to a conveying pipeline. The conveying pipeline is sequentially connected to the cooling rollers 6 and the coating roller group. The cooling rollers 6 have a heat exchange channel that runs through the axial direction, and the conveying pipeline runs through the heat exchange channel.

[0021] The aforementioned magnesium coating device is applicable to, but not limited to, the coating of magnesium oxide slurry onto silicon steel. A low-temperature storage tank 901 stores the magnesium oxide slurry and is equipped with a cooler to control its temperature at a low level. During use, the low-temperature magnesium oxide slurry is transported along the conveying pipeline to the coating roller assembly. Simultaneously, the silicon steel passes through the coating roller assembly, where the magnesium oxide slurry is coated onto both sides of the steel. Between the silicon steel and the coating roller assembly, a cooler is installed inside the cooling roller 6 to regulate its temperature and cool the silicon steel, bringing its temperature close to that of the magnesium oxide slurry. This reduces heat exchange between the silicon steel and the slurry when it is subsequently coated onto the surface, thus maintaining the magnesium oxide slurry at the required low temperature. This prevents premature reaction of the slurry, reduces volatilization, maintains uniformity, avoids affecting the performance of the silicon steel, and ensures coating quality.

[0022] In this magnesium coating device, to offset the temperature rise of the magnesium oxide slurry during transportation, the temperature of the magnesium oxide slurry before delivery is usually lower than the temperature during spraying. The conveying pipeline for the magnesium oxide slurry passes through the interior of the cooling roller 6. During this process, the magnesium oxide slurry can exchange heat inside the cooling roller 6. When the temperature of the magnesium oxide slurry is lower than the internal temperature of the cooling roller 6, it can absorb the heat inside the cooling roller 6 to reduce the cooling load inside the cooling roller 6 and improve the energy-saving effect of the equipment. When the temperature of the magnesium oxide slurry is higher than the internal temperature of the cooling roller 6, the heat inside the magnesium oxide slurry is absorbed, thereby cooling the magnesium oxide to ensure that the temperature of the magnesium oxide slurry meets the requirements during spraying.

[0023] Further improvements include, for example Figure 1 and 2 As shown, the coating roller assembly includes a lower coating roller 3 and an upper coating roller 4 that are horizontally rotatably mounted on the frame 1. The upper coating roller 4 is vertically mounted above the lower coating roller 3. A collection trough 2 is provided directly below the lower coating roller 3. A coating head 905 is provided in front of the upper coating roller 4 along the first direction.

[0024] Specifically, the upper coating roller 4 is driven to rise and fall by a hydraulic cylinder. By raising and lowering the upper coating roller 4, the gap between the upper coating roller 4 and the lower coating roller 3 can be controlled to accommodate silicon steel of different thicknesses and to coat the required thickness of magnesium oxide coating. The upper coating roller 3 and the lower coating roller 4 are driven to rotate in opposite directions by a motor, while the lower coating roller 4 and the cooling roller 6 are driven to rotate synchronously by a motor. The end of the material conveying pipeline is connected to the coating head 905, through which the magnesium oxide slurry is coated onto the top surface of the silicon steel. The upper coating roller 4 ensures that the slurry is evenly coated, and excess slurry enters the collection tank 2. The bottom of the lower coating roller 3 is immersed in the slurry, thereby coating the slurry onto the bottom surface of the silicon steel through the lower coating roller 3, thus completing the continuous coating of magnesium oxide on both sides of the silicon steel and improving the coating efficiency.

[0025] Further improvements include, for example Figure 1 and 2 As shown, the material conveying pipeline includes a branch pipe 903, a heat exchange pipe 907, and a collector pipe 904 connected end to end in sequence. The branch pipe 903 is connected to the low-temperature storage tank 901 and is equipped with a power pump 902. The collector pipe 904 is connected to the coating head 905. The heat exchange pipe 907 is located inside the heat exchange channel and has an S-shaped or spiral structure.

[0026] Specifically, the power pump 902 provides power so that the magnesium oxide slurry inside the low-temperature storage tank 901 is delivered to the coating head 905 through the distribution pipe 903, heat exchange pipe 907 and manifold 904 in sequence. The manifold 904 is mounted above the silicon steel and fixedly connected to the frame 1. The coating head 905 is located below the manifold 904 to facilitate coating.

[0027] Further improvements include, for example Figure 2 As shown, multiple coating heads 905 are arranged at equal intervals along the axial direction of the upper coating roller 4. The arrangement of multiple coating heads 905 can evenly disperse the magnesium oxide slurry onto the top surface of the silicon steel, thereby improving the coating effect of the slurry on the top surface of the silicon steel.

[0028] Further improvements include, for example Figure 2 As shown, the vertical projections of the upper coating roller 4, lower coating roller 3, and each coating head 905 onto the collection tank 2 all fall within the top opening range of the collection tank 2. In the above-described magnesium coating apparatus, since excess magnesium oxide slurry drips from the upper coating roller 4, lower coating roller 3, and each coating head 905, the above arrangement facilitates the collection tank 2 to collect the dripping magnesium oxide slurry, thereby reducing the amount of slurry dripping outside the collection tank 2, reducing slurry loss, and lowering the production cost of the magnesium coating apparatus.

[0029] Further improvements include, for example Figure 2 As shown, the bottom of the collection tank 2 is connected to the low-temperature storage tank 901 via a return pipe 906, which is equipped with a valve. The magnesium oxide slurry inside the collection tank 2 can flow back to the low-temperature storage tank 901 along the return pipe 906. The return speed can be controlled by the valve to ensure that the liquid level inside the collection tank 2 can stably submerge the bottom of the lower coating roller 3, thus ensuring the coating effect. The return pipe 906 enables the circulation of the magnesium oxide slurry. The circulating slurry can be cooled by the cooler inside the low-temperature storage tank 901, preventing the slurry from absorbing heat from the air and causing the temperature to rise and fail to meet production requirements. Secondly, all the magnesium oxide slurry can be recovered and stored in the low-temperature storage tank 901 during shutdown, reducing slurry loss. Furthermore, it can effectively control the liquid level inside the collection tank 2 to ensure the coating effect of the lower coating roller 3.

[0030] Further improvements include, for example Figure 2 As shown, the cooling roller 6 is parallel to the lower coating roller 3, and multiple cooling rollers 6 are arranged along the first direction. The arrangement of multiple cooling rollers 6 can increase the heat exchange time between the silicon steel and the cooling rollers 6, thereby effectively cooling the silicon steel to a temperature close to that of the magnesium oxide slurry.

[0031] Further improvements include, for example Figure 1As shown, a heat-insulating box 702 with an open top is mounted on the frame 1. The cooling roller 6 is located inside the heat-insulating box 702. A heat-insulating cover 701 is also detachably connected to the frame 1. The heat-insulating cover 701 covers the top opening of the heat-insulating box 702, and there is a gap between the heat-insulating cover 701 and the heat-insulating box 702 that allows silicon steel to pass through. The heat-insulating box 702 and the heat-insulating cover 701 can be made of foam plastic board, which can slow down the heat exchange rate between the cooling roller 6 and the air, thereby reducing energy loss and improving the energy-saving effect of the device.

[0032] Further improvements include, for example Figure 3-5 As shown, the cooling roller 6 includes a tubular roller body 604, with end caps 602 sealing both ends of the roller body 604. A tubular support shaft 603 is fixedly connected to the end caps 602, and the support shaft 603 is coaxially arranged with the roller body 604. The cooling roller 6 is designed as a combination structure of the roller body 604 and the end caps 602, which facilitates the disassembly and assembly of the cooling roller 6, thereby making it easier to maintain the heat exchange tube 907 passing through it and improving the ease of use of the equipment. The heat exchange tube 907 does not come into contact with the roller body 604 when passing through the support shaft 63, thereby reducing the mutual wear between the cooling roller 6 and the heat exchange tube 907 when the cooling roller 6 rotates and improving the smoothness of the rotation of the heat exchange tube 907.

[0033] Further improvements include, for example Figure 3-5 As shown, an annular groove 605 is provided on the outer circumference of the roller body 604, and a heat-conducting rubber sleeve 601 is disposed inside the annular groove 605. The annular groove 605 is used to restrict the heat-conducting rubber sleeve 601, improve its installation firmness, and when the heat-conducting rubber sleeve 601 is squeezed, it can increase the contact area between the cooling roller 6 and the silicon steel, improve the cooling effect on the silicon steel; and it can also reduce slippage and wear between the two, and improve the transmission efficiency of the equipment.

[0034] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A silicon steel cooling type continuous magnesium coating device, characterized in that, include: The frame has a first direction along the direction of silicon steel movement. Cooling rollers and coating rollers are sequentially arranged on the frame along the first direction. The coating rollers include a lower coating roller and an upper coating roller that are horizontally rotatably arranged on the frame. The frame is equipped with a low-temperature storage tank, which is connected to a conveying pipeline. The conveying pipeline is connected in sequence to the cooling roller and the coating roller assembly. The cooling roller has a heat exchange channel that runs through the axial direction, and the conveying pipeline runs through the heat exchange channel. The cooling roller is parallel to the lower coating roller, and multiple cooling rollers are arranged along the first direction; The cooling roller includes a tubular roller body, both ends of which are sealed with end caps. A tubular support shaft is fixedly connected to the end caps, and the support shaft is coaxially arranged with the roller body. The upper coating roller is vertically mounted above the lower coating roller. A collection trough is provided directly below the lower coating roller. A coating head is provided in front of the upper coating roller along a first direction.

2. The silicon steel cooling continuous magnesium coating device according to claim 1, characterized in that, The material conveying pipeline includes a branch pipe, a heat exchange pipe, and a manifold connected end to end in sequence. The branch pipe is connected to the low-temperature storage tank and is equipped with a power pump. The manifold is connected to the coating head. The heat exchange pipe is located inside the heat exchange channel and has an S-shaped or spiral structure.

3. The silicon steel cooling continuous magnesium coating device according to claim 2, characterized in that, The coating heads are arranged at equal intervals along the axial direction of the upper coating roller.

4. The silicon steel cooling continuous magnesium coating device according to claim 1, characterized in that, The projections of the upper coating roller, the lower coating roller, and each coating head along the vertical direction onto the collection trough all fall within the top opening range of the collection trough.

5. The silicon steel cooling continuous magnesium coating device according to claim 1, characterized in that, The bottom of the collection tank is connected to the low-temperature storage tank via a return pipe, and a valve is installed on the return pipe.

6. The silicon steel cooling continuous magnesium coating device according to claim 1, characterized in that, The frame is equipped with an open-top insulated box, and the cooling roller is located inside the insulated box. An insulated cover is also detachably connected to the frame. The insulated cover is placed over the top opening of the insulated box, and there is a gap between the insulated cover and the insulated box that allows the silicon steel to pass through.

7. The silicon steel cooling continuous magnesium coating device according to claim 1, characterized in that, The outer circumference of the roller body is provided with an annular groove, and a heat-conducting rubber sleeve is provided inside the annular groove.

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