Device for improving the quality of caustic washing of oriented silicon steel and caustic washing method

Abstract

The application belongs to the technical field of oriented silicon steel alkali washing, and particularly relates to a device for improving the alkali washing quality of oriented silicon steel, which comprises a soaking tank and a spraying tank. Steel belt inlets and outlets are arranged on the left and right side walls of the soaking tank, and two guide rotating rollers are rotatably arranged on the left and right sides of the inside of the soaking tank. Steel belt through grooves are arranged on the left and right side walls of the spraying tank, two squeeze dry rollers are arranged on the left and right sides of the inside of the spraying tank, the positions of the two squeeze dry rollers correspond to the positions of the steel belt through grooves, two rows of support columns are arranged on the front and back sides of the inside of the spraying tank, the two rows of support columns on the front and back sides of the inner wall of the spraying tank are arranged in an up-down manner, and spraying plates are arranged on the ends of the support columns away from the inner wall of the spraying tank. The soaking tank can completely soak and disperse oil stains on the surface of the silicon steel before alkali liquid brushing. The alkali liquid spraying device sprays the silicon steel after soaking to further disperse and remove the oil stains on the surface.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oriented silicon steel alkali washing, in particular to a device for improving the alkali washing quality of oriented silicon steel and an alkali washing method. BACKGROUND

[0002] Oriented silicon steel is an important material widely used in the manufacture of motors and transformers. It is usually produced from cold-rolled steel strips to have specific magnetic properties. However, during the production of oriented silicon steel, due to the use of lubricants and rolling oils, oil stains often form on the surface of the material. If these surface oil stains cannot be effectively cleaned, problems will occur in the subsequent alkali washing process, resulting in poor alkali washing effect, and even oil stains will be left on the bottom layer of the product, thereby affecting the quality and appearance of the product. Therefore, improving the alkali washing effect of oriented silicon steel is an important industrial demand.

[0003] Traditional oil stain alkali washing methods usually include alkali washing tank brushing, squeezing, water brushing, squeezing, and drying steps. However, these traditional methods have some problems. In the alkali washing tank, the oriented silicon steel strip moves quickly, the contact time between the oriented silicon steel strip and the alkali washing solution is short, the alkali washing effect is unstable, and it is difficult to ensure the complete removal of oil stains (similar problems also exist for the alkali washing of other materials). Therefore, it is necessary to propose a more effective method to improve the alkali washing effect and improve product quality. SUMMARY

[0004] The purpose of the present application is to provide a device for improving the alkali washing quality of oriented silicon steel and an alkali washing method to solve the problems of short contact time between the steel strip and the alkali washing solution and unstable alkali washing effect in the current alkali washing method as described in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a device for improving the alkali washing quality of oriented silicon steel, comprising:

[0006] a soaking tank and a spraying tank;

[0007] wherein the left and right side walls of the soaking tank are provided with steel strip inlets and outlets, two guide rollers are rotatably installed on the left and right sides of the inside of the soaking tank, the two guide rollers on the left and right sides of the inside of the soaking tank are arranged in a high-low manner, and a constant-temperature alkali solution is stored in the soaking tank;

[0008] the left and right side walls of the spraying tank are provided with steel strip through slots, two squeezing rollers are arranged on the left and right sides of the inside of the spraying tank, the positions of the two squeezing rollers correspond to the steel strip through slots, two rows of support columns are arranged on the front and rear sides of the inside of the spraying tank, the two rows of support columns on the front and rear sides of the inner wall of the spraying tank are arranged in an upper and lower manner, the ends of the support columns away from the inner wall of the spraying tank are provided with spraying plates, and the support columns on the front and rear sides of the inner wall of the spraying tank are arranged in an interlaced manner;

[0009] The upper surface of the spray plate is provided with a pin seat. The number of pin seats is the same as that of the support columns, and the positions of the pin seats and the support columns correspond. An electric telescopic rod is rotatably connected between the front and rear spray plates. Dispersing nozzles are installed on the facing side walls of the upper and lower spray plates. A connecting pipe is provided at the end of the spray plate, and a liquid supply pipe is installed on the connecting pipe. An inlet connector pipe is provided on the outer wall of the spray tank, and the liquid supply pipe is connected to the inlet connector pipe.

[0010] Preferably, the guide roller closer to the steel strip inlet / outlet side of the two guide rollers is higher than the other guide roller.

[0011] Preferably, the side wall of the soaking tank is provided with a pH sensor, a controller, and an alkaline solution inlet pipe. The detection end of the pH sensor is inserted into the lower side of the inner cavity of the soaking tank. One end of the alkaline solution inlet pipe extends into the inner cavity of the soaking tank, and the other end of the alkaline solution inlet pipe is connected to an alkaline solution storage tank. An electric suction pump is provided on the pipeline of the alkaline solution inlet pipe. The output end of the pH sensor is connected to the controller, and the controller outputs control of the electric suction pump.

[0012] Preferably, a temperature sensor is provided on the side wall of the soaking tank, and an electric heating device is provided on the lower side of the inner cavity of the soaking tank. The output end of the temperature sensor is connected to the controller, and the output end of the controller is electrically connected to the electric heating device.

[0013] Preferably, the front and rear sidewalls of the spray tank are connected to hanging plates, the two hanging plates extend to the inside of the spray tank, and the facing sidewalls of the two hanging plates are provided with mounting plates. The upper pillars on the front and rear sides of the spray tank are respectively connected to the corresponding mounting plates.

[0014] Preferably, there are twelve support pillars, with three pillars forming a group. Two groups of support pillars are provided on both the front and rear side walls inside the spray tank, and the two groups of support pillars are distributed vertically. The two groups of support pillars on the upper side inside the spray tank are respectively connected to the mounting plates on both sides.

[0015] Preferably, the mounting plate is located on the inner side of the spray tank, with a backing plate and a hook connected to the upper side of the backing plate. The backing plate is hung on the side wall of the spray tank by the hook. The backing plate is provided with evenly spaced positioning holes, and a positioning pin is inserted into the mounting plate. The positioning pin is connected to the positioning hole.

[0016] Preferably, the right side wall of the spray tank is symmetrically provided with scraper assemblies at the front and rear. The scraper assembly includes an installation strip, two legs connected to the upper and lower sides of the installation strip, a surface scraper embedded between the upper and lower sides of the two legs, and a side scraper connected between the upper and lower surface scrapers. The opposing side walls of the two legs are provided with slots that are adapted to the surface scrapers. The steel strip through groove is located between the upper and lower surface scrapers. The surface scraper is set in an arc shape.

[0017] An alkaline washing method for improving the quality of alkaline washing of grain-oriented silicon steel, the method being based on an apparatus for improving the quality of alkaline washing of grain-oriented silicon steel, and specifically including:

[0018] S1: Insert one end of the steel strip to be alkaline washed into the steel strip inlet / outlet at the left end of the soaking tank, and under the guidance of the guide rollers at both ends, immerse the steel strip in the alkaline solution in the soaking tank for preliminary alkaline washing.

[0019] S2: The steel strip that has passed through the soaking tank is output from the steel strip inlet and outlet at the right end of the soaking tank and inserted into the spray tank through the steel strip through the left side of the spray tank. At this time, the steel strip passes through the spray plates on the upper and lower sides of the spray tank and exits through the steel strip through the right side of the spray tank.

[0020] S3: As the steel strip passes between the upper and lower spray plates, the alkaline solution in the spray plates is sprayed onto the upper and lower surfaces of the steel strip through the dispersing nozzles. At the same time, the repeated extension and retraction of the electric telescopic rod causes the spray plates on the front and rear sides to swing, thereby causing the dispersing nozzles on the spray plates to swing and evenly spray the alkaline solution onto the upper and lower surfaces of the steel strip for secondary alkaline washing.

[0021] Preferably, the alkaline aqueous solution is a 2.5%-3% sodium hydroxide aqueous solution.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] An immersion tank is introduced before alkaline washing, and a spray tank is added between the immersion tank and the alkaline washing tank. The spray tank has an integrated alkaline spraying device. The immersion tank is a device used to soak grain-oriented silicon steel in alkaline solution to thoroughly wet and disperse oil stains on the surface of the silicon steel before alkaline washing. Then, the alkaline spraying device sprays the soaked silicon steel to further disperse and remove surface oil stains. The combined use of the immersion tank and the spraying device improves the alkaline washing effect of the grain-oriented silicon steel, ensures thorough removal of surface oil stains, and improves the underlying quality of the product.

[0024] When in use, the electric telescopic rod can drive the spray plates on the front and rear sides of the spray tank to swing, thereby expanding the spray range of the spray plates and enabling a large-scale spraying of the surface of the grain-oriented silicon steel strip. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the steel belt being transported within the immersion tank of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the spray plate, pin seat, and electric telescopic rod of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the mounting plate of the present invention;

[0029] Figure 5 This is a schematic diagram of the scraper assembly of the present invention;

[0030] Figure 6 This is a schematic diagram of the scraper assembly of the present invention after the side scraper strips and the surface scraper strips have been removed;

[0031] Figure 7 This is a schematic diagram of the scraper assembly of the present invention scraping excess alkaline aqueous solution from the edge of the steel strip.

[0032] In the diagram: 1. Soaking tank; 2. Spray tank; 3. Steel strip inlet / outlet; 4. Guide roller; 5. Electric heating device; 6. Temperature sensor; 7. pH sensor; 8. Alkaline solution replenishment pipe; 9. Controller; 10. Steel strip through-hole; 11. Squeeze roller; 12. Hanging plate; 121. Backing plate; 122. Hook; 123. Positioning hole; 124. Positioning pin; 13. Mounting plate; 14. Support column; 15. Spray plate; 16. Pin seat; 17. Electric telescopic rod; 18. Dispersing nozzle; 19. Liquid supply pipe; 20. Liquid inlet connector pipe; 21. Connecting pipe; 22. Mounting strip; 23. Support leg; 24. Slot; 25. Side scraper; 26. Surface scraper. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Example

[0035] Please see Figures 1-7 The present invention provides a technical solution: an apparatus for improving the alkaline washing quality of oriented silicon steel, comprising: an immersion tank 1 and a spray tank 2, wherein the immersion tank 1 is located to the left of the spray tank 2 and upstream of the spray tank 2, and the steel strip enters the spray tank 2 for spraying after being immersed in the immersion tank 1.

[0036] The immersion tank 1 has steel strip inlet and outlet 3 on both the left and right side walls. Two guide rollers 4 are rotatably installed on both the left and right sides inside the immersion tank 1. The two guide rollers 4 on both sides inside the immersion tank 1 are arranged in a high-low pattern. The immersion tank 1 contains a constant temperature alkaline solution. One of the two guide rollers 4 is an immersion roller with a lower height, which is used to press the steel strip down and immerse it in the alkaline solution.

[0037] The left and right side walls of the spray tank 2 are provided with steel strip through grooves 10. Two squeezing rollers 11 are provided on the left and right sides of the inside of the spray tank 2. The two squeezing rollers 11 are positioned in relation to the steel strip through grooves 10. Two rows of support columns 14 are provided on the front and rear sides of the inside of the spray tank 2. The two rows of support columns 14 on the front and rear sides of the inner wall of the spray tank 2 are arranged vertically. A spray plate 15 is provided at the end of the support column 14 away from the inner wall of the spray tank 2. The support columns 14 on the front and rear sides of the inner wall of the spray tank 2 are arranged alternately.

[0038] The upper surface of the spray plate 15 is provided with a pin seat 16. The number of pin seats 16 is the same as that of the support column 14, and the positions of the pin seats 16 and the support column 14 are corresponding. An electric telescopic rod 17 is rotatably connected between the front and rear sides of the spray plates 15. Dispersing nozzles 18 are installed on the facing side walls of the upper and lower sides of the spray plates 15. A connecting pipe 21 is provided at the end of the spray plate 15. A liquid supply pipe 19 is installed on the connecting pipe 21. A liquid inlet connector pipe 20 is provided on the outer wall of the spray tank 2. The liquid supply pipe 19 is connected to the liquid inlet connector pipe 20.

[0039] Analysis of the above content: The grain-oriented silicon steel strip is inserted into the steel strip inlet / outlet 3 on the left side of the immersion tank 1, according to... Figure 2 The steel strip is guided in a way that allows a section of the steel strip in the soaking tank 1 to be immersed downwards into a constant-temperature alkaline solution. The steel strip is initially soaked by the constant-temperature alkaline solution. The width of the steel strip is smaller than the width of the soaking tank 1, so that there is space on both sides for the alkaline solution to overflow. Afterwards, the steel strip passes through the spray tank 2 from the steel strip inlet / outlet 3 and the steel strip through groove 10 on the right side of the soaking tank 1.

[0040] Four spray plates 15 are installed inside the spray tank 2. The four spray plates 15 are respectively connected to the front and rear side support columns 14 inside the spray tank 2. In this way, the two upper spray plates 15 on the front and rear sides of the spray tank 2 are located on the upper side of the steel strip, and the two lower spray plates 15 on the front and rear sides of the spray tank 2 are located on the lower side of the steel strip. The alkaline solution is provided to the spray plates 15 through the liquid inlet connector pipe 20 and the liquid supply pipe 19. The alkaline solution enters the spray plates 15 and is sprayed on the upper and lower surfaces of the steel strip through the dispersion nozzles 18. During the spraying process, the electric telescopic rod 17 reciprocates under the drive of the drive circuit (existing control technology), so that the two spray plates 15 on the upper side and the two spray plates 15 on the lower side of the steel strip swing back and forth, thereby spraying a large area of ​​the steel strip surface. The dispersion nozzles 18 on the two sides of the spray plates 15 are staggered. When the electric telescopic rod 17 drives the corresponding spray plates 15 on both sides to swing, the dispersion nozzles 18 on both sides can cover the entire area of ​​the steel strip by swinging. Example

[0041] Please see Figures 1-7 The present invention provides a technical solution: the guide roller 4 on the side closer to the steel strip inlet / outlet 3 of the two guide rollers 4 is higher than the other guide roller 4.

[0042] Analysis of the above content: The lower-positioned guide roller 4 presses the steel strip down, while the higher-positioned guide roller 4 raises the steel strip, so that the steel strip can reach the height of the steel strip inlet and outlet 3. Example

[0043] Please see Figures 1-7 This invention provides a technical solution: a pH sensor 7, a controller 9, and an alkaline solution inlet pipe 8 are installed on the side wall of the soaking tank 1. The detection end of the pH sensor 7 is inserted into the lower inner cavity of the soaking tank 1. One end of the alkaline solution inlet pipe 8 extends into the inner cavity of the soaking tank 1, and the other end of the alkaline solution inlet pipe 8 is connected to an alkaline solution storage tank. An electric suction pump is installed on the pipeline of the alkaline solution inlet pipe 8. The output end of the pH sensor 7 is connected to the controller 9, and the controller 9 outputs control of the electric suction pump. A temperature sensor 6 is installed on the side wall of the soaking tank 1, and an electric heating device 5 is installed on the lower inner cavity of the soaking tank 1. The output end of the temperature sensor 6 is connected to the controller 9, and the output end of the controller 9 is electrically connected to the electric heating device 5.

[0044] Analysis of the above: A suitable pH range for the alkaline solution is preset. The pH sensor 7 detects the pH value of the alkaline solution. When the pH sensor 7 detects that the pH value of the alkaline solution is insufficient for alkaline washing (based on pH value to determine the concentration of the alkaline solution), alkaline solution is added through the alkaline solution replenishment pipe 8. A suitable temperature range for the alkaline solution is preset (70-80℃). When the temperature sensor 6 detects that the temperature of the alkaline solution exceeds the preset suitable temperature range, the controller 9 controls the electric heating device 5 to stop heating. Example

[0045] Please see Figures 1-7 The present invention provides a technical solution: The front and rear sidewalls of the spray tank 2 are each connected to a hanging plate 12. Two hanging plates 12 extend into the inner side of the spray tank 2. Each of the two hanging plates 12 has an mounting plate 13 on its facing sidewall. The upper supports 14 on the front and rear sides of the spray tank 2 are respectively connected to the corresponding mounting plates 13. Twelve supports 14 are provided, arranged in groups of three. Two groups of supports 14 are provided on both the front and rear sidewalls of the spray tank 2, and these two groups are arranged vertically. The two upper groups of supports 14 inside the spray tank 2 are respectively connected to the mounting plates 13 on both sides. The hanging plate 12 is located inside the spray tank 2, with a backing plate 121 and a hook 122 connected to the upper side of the backing plate 121. The backing plate 121 is hung on the side wall of the spray tank 2 by the hook 122. Positioning holes 123 are evenly opened on the backing plate 121. Positioning pins 124 are inserted into the mounting plate 13, and the positioning pins 124 are connected to the positioning holes 123.

[0046] Analysis of the above content: Based on the thickness of the steel plate, the positioning pin 124 is removed, the mounting plate 13 is adjusted, and the upper mounting plate 13, support column 14, and spray plate 15 are adjusted so that the distance between the upper and lower spray plates 15 is adjusted. After adjustment, the positioning pin 124 is connected with the corresponding positioning hole 123 to achieve positioning of the upper mounting plate 13, support column 14, and spray plate 15. Example

[0047] Please see Figures 1-7 The present invention provides a technical solution: a scraper assembly is symmetrically arranged on the front and rear sides of the right side wall of the spray tank 2. The scraper assembly includes an installation strip 22, two support legs 23 connected to the upper and lower sides of the installation strip 22, a surface scraper 26 embedded between the upper and lower sides of the two support legs 23, and a side scraper 25 connected between the upper and lower surface scraper 26. The facing side walls of the two support legs 23 are provided with slots 24 adapted to the surface scraper 26. The steel strip through groove 10 is located between the upper and lower surface scraper 26. The surface scraper 26 is set in an arc shape.

[0048] Analysis of the above content: After the steel strip is squeezed by the squeeze roller 11, the alkaline solution is squeezed and remains on the edge of the steel strip. The steel strip treated by the spray tank 2 passes through the top and bottom surface scrapers 26. The surface scrapers 26 scrape the edges of the top and bottom surfaces of the steel strip, and the side scrapers 25 scrape the sides of the steel strip. Both the side scrapers 25 and the surface scrapers 26 are made of rubber.

[0049] An alkaline washing method for improving the quality of alkaline washing of grain-oriented silicon steel, the alkaline washing method for improving the quality of alkaline washing of grain-oriented silicon steel is based on an apparatus for improving the quality of alkaline washing of grain-oriented silicon steel, the alkaline washing method specifically includes:

[0050] S1: Insert one end of the steel strip to be alkaline washed into the steel strip inlet / outlet 3 at the left end of the soaking tank 1, and under the guidance of the guide rollers 4 at both ends, immerse the steel strip in the alkaline solution in the soaking tank 1. The alkaline solution is a 2.5%-3% sodium hydroxide solution for preliminary alkaline washing.

[0051] S2: The steel strip that has passed through the soaking tank 1 is output from the steel strip inlet / outlet 3 at the right end of the soaking tank 1 and inserted into the spray tank 2 through the steel strip through slot 10 on the left side of the spray tank 2. At this time, the steel strip passes through the spray plates 15 on the upper and lower sides of the spray tank 2 and exits through the steel strip through slot 10 on the right side of the spray tank 2.

[0052] S3: As the steel strip passes between the upper and lower spray plates 15, the alkaline solution in the spray plates 15 is sprayed onto the upper and lower surfaces of the steel strip through the dispersing nozzles 18. At the same time, the repeated extension and retraction of the electric telescopic rod 17 causes the spray plates 15 on the front and rear sides to swing, thereby causing the dispersing nozzles 18 on the spray plates 15 to swing and evenly spray the alkaline solution onto the upper and lower surfaces of the steel strip for secondary alkaline washing.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the invention is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An apparatus for improving the alkaline washing quality of grain-oriented silicon steel, characterized in that, include: Soaking tank (1) and spray tank (2); The soaking tank (1) has steel strip inlet and outlet (3) on both the left and right side walls. Two guide rollers (4) are rotatably installed on both the left and right sides inside the soaking tank (1). The two guide rollers (4) on both sides inside the soaking tank (1) are arranged in a high-low pattern. The soaking tank (1) contains a constant temperature alkaline solution. The left and right side walls of the spray tank (2) are provided with steel strip through grooves (10). Two squeezing rollers (11) are provided on the left and right sides of the inside of the spray tank (2). The two squeezing rollers (11) correspond to the positions of the steel strip through grooves (10). Two rows of support columns (14) are provided on the front and back sides of the inside of the spray tank (2). The two rows of support columns (14) on the front and back sides of the inner wall of the spray tank (2) are arranged vertically. A spray plate (15) is provided at the end of the support column (14) away from the inner wall of the spray tank (2). The support columns (14) on the front and back sides of the inner wall of the spray tank (2) are arranged alternately. The upper surface of the spray plate (15) is provided with a pin seat (16). The number of pin seats (16) is the same as that of the support column (14), and the pin seats (16) and the support column (14) are in corresponding positions. An electric telescopic rod (17) is rotatably connected between the spray plates (15) on the front and rear sides. Dispersing nozzles (18) are installed on the facing side walls of the spray plates (15) on the upper and lower sides. A connecting pipe (21) is provided at the end of the spray plate (15). A liquid supply pipe (19) is installed on the connecting pipe (21). An inlet connector pipe (20) is provided on the outer wall of the spray tank (2). The liquid supply pipe (19) is connected to the inlet connector pipe (20).

2. The apparatus for improving the alkaline washing quality of grain-oriented silicon steel according to claim 1, characterized in that: The guide roller (4) closer to the steel strip inlet / outlet (3) of the two guide rollers (4) is higher than the other guide roller (4).

3. The apparatus for improving the alkaline washing quality of grain-oriented silicon steel according to claim 1, characterized in that: A pH sensor (7), a controller (9), and an alkaline solution inlet pipe (8) are provided on the side wall of the soaking tank (1). The detection end of the pH sensor (7) is inserted into the lower side of the inner cavity of the soaking tank (1). One end of the alkaline solution inlet pipe (8) extends into the inner cavity of the soaking tank (1), and the other end of the alkaline solution inlet pipe (8) is connected to the alkaline solution storage tank. An electric suction pump is provided on the pipeline of the alkaline solution inlet pipe (8). The output end of the pH sensor (7) is connected to the controller (9), and the controller (9) outputs control of the electric suction pump.

4. The apparatus for improving the alkaline washing quality of grain-oriented silicon steel according to claim 3, characterized in that: A temperature sensor (6) is provided on the side wall of the soaking tank (1), and an electric heating device (5) is provided on the lower side of the inner cavity of the soaking tank (1). The output end of the temperature sensor (6) is connected to the controller (9), and the output end of the controller (9) is electrically connected to the electric heating device (5).

5. The apparatus for improving the alkaline washing quality of grain-oriented silicon steel according to claim 1, characterized in that: The front and rear side walls of the spray tank (2) are connected to hanging plates (12), and the two hanging plates (12) extend to the inner side of the spray tank (2). The two hanging plates (12) are provided with mounting plates (13) on their facing side walls. The upper support columns (14) on the front and rear sides of the spray tank (2) are respectively connected to the corresponding mounting plates (13).

6. The apparatus for improving the alkaline washing quality of grain-oriented silicon steel according to claim 5, characterized in that: The support column (14) is provided with twelve columns, and the support column (14) is set in groups of three. The front and rear side walls of the spray tank (2) are provided with two groups of support columns (14), and the two groups of support columns (14) are distributed vertically. The two groups of support columns (14) on the upper side of the spray tank (2) are respectively connected to the mounting plates (13) on both sides.

7. The apparatus for improving the alkaline washing quality of grain-oriented silicon steel according to claim 5, characterized in that: The hanging plate (12) is located on the inner side of the spray tank (2) with a backing plate (121) and a hook (122) connected to the upper side of the backing plate (121). The backing plate (121) is hung on the side wall of the spray tank (2) by the hook (122). The backing plate (121) is evenly provided with positioning holes (123). The mounting plate (13) is inserted with a positioning pin (124). The positioning pin (124) is connected to the positioning hole (123).

8. The apparatus for improving the alkaline washing quality of grain-oriented silicon steel according to claim 1, characterized in that: The right side wall of the spray tank (2) is symmetrically provided with scraper assemblies. The scraper assembly includes an installation strip (22), two legs (23) connected to the upper and lower sides of the installation strip (22), a surface scraper (26) embedded between the upper and lower sides of the two legs (23), and a side scraper (25) connected between the upper and lower surface scrapers (26). The two legs (23) have slots (24) that are adapted to the surface scraper (26) on their facing side walls. The steel strip through groove (10) is located between the upper and lower surface scrapers (26). The surface scraper (26) is set in an arc shape.

9. An alkaline washing method for improving the quality of alkaline washing of grain-oriented silicon steel, characterized in that: The alkaline washing method for improving the alkaline washing quality of grain-oriented silicon steel is based on the apparatus for improving the alkaline washing quality of grain-oriented silicon steel according to any one of claims 1-8, and the alkaline washing method specifically includes: S1: Insert one end of the steel strip to be alkaline washed into the steel strip inlet and outlet (3) at the left end of the soaking tank (1), and under the guidance of the guide rollers (4) at both ends, immerse the steel strip in the alkaline solution in the soaking tank (1) for preliminary alkaline washing. S2: The steel strip that has passed through the soaking tank (1) is output from the steel strip inlet and outlet (3) at the right end of the soaking tank (1) and inserted into the spray tank (2) through the steel strip through groove (10) on the left side of the spray tank (2). At this time, the steel strip passes through the spray plates (15) on the upper and lower sides of the spray tank (2) and exits through the steel strip through groove (10) on the right side of the spray tank (2). S3: As the steel strip passes between the upper and lower spray plates (15), the alkaline solution in the spray plate (15) is sprayed onto the upper and lower surfaces of the steel strip through the dispersing nozzle (18). At the same time, the repeated extension and retraction of the electric telescopic rod (17) causes the spray plates (15) on the front and rear sides to swing, thereby causing the dispersing nozzle (18) on the spray plate (15) to swing and spray the alkaline solution evenly onto the upper and lower surfaces of the steel strip for secondary alkaline washing.

10. The alkaline washing method for improving the alkaline washing quality of grain-oriented silicon steel according to claim 9, characterized in that: The alkaline aqueous solution is a 2.5%-3% sodium hydroxide aqueous solution.

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