Automatic polishing equipment for cold-rolled steel sheet

Abstract

The utility model provides automatic polishing equipment for a cold-rolled steel sheet. The automatic polishing equipment comprises a polishing device, a cleaning device, a first housing, a power supply device and a control panel. First rotating shafts are arranged at the two ends of the first housing correspondingly and rotationally connected with the middle of the first housing. The polishing device is arranged on the top face of the first housing, an opening is formed in the bottom, and a steel plate penetrates through the polishing device through the opening and then penetrates through the first housing through first rotating shafts at the two ends. A power pump and a nozzle in the cleaning device are connected with the pipeline assembly, and the nozzle is arranged at the top of the polishing device. The power supply device is electrically connected with the power pump, the polishing device and the control panel, and the control panel can control the power pump and the polishing device. The cleaning device can remove impurities generated in the polishing process; the first rotating shafts on the two sides of the polishing device can guide the polished steel plate from the first rotating shaft on one side to the first rotating shaft on the other side, the surface of the steel plate is automatically changed, and the problems that the polishing effect of the polishing device is poor and the surface cannot be automatically changed can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of steel rolling polishing, and in particular to an automatic polishing device for cold-rolled steel plates. Background Art

[0002] Cold-rolled steel refers to steel whose rolling termination temperature is lower than the recrystallization temperature of the steel. Although the surface of cold-rolled steel is brighter than that of hot-rolled steel, some impurities will adhere to the surface of cold-rolled steel. These attachments will reduce the quality of the steel coil, so the surface of the cold-rolled steel needs to be ground and polished. In some embodiments, an automated polishing device can be used to polish the cold-rolled steel plate, but some automated polishing devices only polish the surface of the steel plate and do not clean the surface of the steel plate after polishing. Therefore, the impurities attached to the surface of the steel plate cannot be completely removed, resulting in poor polishing effect. There are also some automated polishing devices that cannot automatically change the surface after completing the single-sided polishing of the steel coil. Since the steel plate is heavy, when polishing the other side, the steel coil needs to be tediously changed, which takes a long time to polish the steel coil and has low polishing efficiency. Utility Model Content

[0003] The present application provides an automatic polishing device for cold-rolled steel plates to solve the problem that the polishing device has poor polishing effect and cannot automatically change the surface.

[0004] The present application provides an automatic polishing device for cold-rolled steel plates, comprising: a polishing device, a cleaning device, a first housing, a power supply device, and a control panel; wherein the power supply device is disposed inside the first housing, the polishing device is detachably connected to the top surface of the first housing, and the control panel is detachably connected to the side surface of the first housing;

[0005] A first rotating shaft is provided at each end of the first housing, and the first rotating shaft is rotatably connected to the middle portion of the first housing; the polishing device is provided between the two first rotating shafts, and an opening is provided at the bottom of the polishing device, and the two openings are respectively provided on both sides of the polishing device near the first rotating shaft; after the steel plate passes through the polishing device through the opening, it passes through the first housing via the generatrix at the highest point of the first rotating shaft at both ends;

[0006] The cleaning device includes a liquid storage tank, a power pump, a pipe assembly and a nozzle. The liquid storage tank is detachably connected to the side of the first housing. The power pump is arranged on the side of the liquid storage tank and is detachably connected to one end of the pipe assembly. The nozzle is arranged on the top of the polishing device and is detachably connected to the end of the pipe assembly away from the power pump.

[0007] The power supply device is electrically connected to the power pump, the polishing device and the control panel respectively, and the control panel is electrically connected to the power pump and the polishing device respectively.

[0008] By setting up the cleaning device and setting the nozzle on the top of the polishing device, the steel plate being polished can be cleaned and impurities generated during the polishing process can be removed; by setting the first rotating shaft on both sides of the polishing device, the polished steel plate can be guided from the first rotating shaft on one side to the first rotating shaft on the other side, and the surface of the steel plate can be automatically changed, which can solve the problem that the polishing device has poor polishing effect and cannot automatically change the surface.

[0009] Optionally, the polishing device includes a second cover shell, a telescopic rod and a polishing assembly, the second cover shell is detachably connected to the top surface of the first cover shell, and the telescopic rod and the polishing assembly are arranged inside the second cover shell; one end of the telescopic rod is detachably connected to the top surface of the second cover shell, and the other end of the telescopic rod is detachably connected to the polishing assembly, and the telescopic rod and the polishing assembly are electrically connected to the power supply device and the control panel, respectively.

[0010] Optionally, the openings are respectively provided on both sides of the second cover shell close to the first rotating shaft.

[0011] Optionally, a connecting column is provided on the top surface of the second housing, and the telescopic rod is detachably connected to the top surface of the second housing via the connecting column. By providing the connecting column, the connection between the telescopic rod and the second housing can be made more secure.

[0012] Optionally, the pipeline assembly includes a first pipeline, a second pipeline and a pipe joint, the pipe joint is detachably connected to the top surface of the second cover shell, one end of the first pipeline is detachably connected to the power pump, the other end of the first pipeline is connected to one end of the second pipeline through the pipe joint, the second pipeline is arranged on the top surface inside the second cover shell, and the nozzle is detachably connected to the side wall of the second pipeline.

[0013] Optionally, fixed shafts are provided at both ends of the first housing, the fixed shafts being detachably connected to both sides of the first housing, and the two ends of the first rotating shaft are rotatably connected to the fixed shafts. By providing the fixed shafts, the strength of the rotational connection between the first rotating shaft and the first housing can be improved.

[0014] Optionally, the first housing further includes a second rotating shaft, which is disposed at both ends of the first housing and is detachably connected to the top of the first housing. The second rotating shaft rotatably connected to the first housing facilitates the advancement of the steel plate to the polishing device.

[0015] Optionally, support plates are respectively provided at both ends of the first cover shell, wherein the two support plates at one end are respectively detachably connected to the two sides of the first cover shell, and the second rotating shaft is provided between the two support plates, and the second rotating shaft is rotatably connected to the support plates.

[0016] Optionally, the top surface of the liquid storage tank is provided with a cover plate, the cover plate being hinged to the liquid storage tank; the side of the liquid storage tank is provided with a water inlet, the water inlet being fixedly connected to the liquid storage tank. The provision of the cover plate facilitates the addition of an antioxidant solvent into the liquid storage tank.

[0017] The present application provides an automatic polishing device for cold-rolled steel plates, comprising: a polishing device, a cleaning device, a first cover shell, a power supply device and a control panel. The power supply device is arranged in the first cover shell, the polishing device is arranged on the top surface of the first cover shell, and the control panel is arranged on the side surface of the first cover shell. A first rotating shaft is respectively provided at both ends of the first cover shell, and the first rotating shaft is rotatably connected to the middle part of the first cover shell; the polishing device is arranged between the two first rotating shafts, and an opening is provided at the bottom. After the steel plate passes through the polishing device through the opening, it passes through the first cover shell via the busbar at the highest point of the first rotating shaft at both ends. The cleaning device includes a liquid storage tank, a power pump, a pipeline assembly and a nozzle. The power pump is detachably connected to one end of the pipeline assembly, and the nozzle is arranged on the top of the polishing device and is detachably connected to the pipeline assembly. The power supply device is electrically connected to the power pump, the polishing device and the control panel respectively, and the control panel is electrically connected to the power pump and the polishing device respectively. By setting up a cleaning device to automatically clean the steel plate being polished, impurities generated during the polishing process can be removed; by setting a first rotating shaft on both sides of the polishing device, the polished steel plate is guided from the first rotating shaft on one side to the first rotating shaft on the other side, and the surface of the steel plate can be automatically changed, thereby solving the problem that the polishing effect of the polishing device is poor and the surface cannot be changed automatically. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 A schematic diagram of the main structure of the automatic polishing equipment for cold-rolled steel plates provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the rear view structure of the automatic polishing equipment for cold-rolled steel plates provided in an embodiment of the present application;

[0021] Figure 3 This is a schematic diagram of the internal structure of the polishing device provided in an embodiment of the present application.

[0022] Illustration:

[0023] Among them, 1-baffle; 2-second cover; 3-first pipeline; 4-first cover; 5-liquid storage tank; 6-water inlet; 7-power pump; 8-power supply device; 9-second rotating shaft; 10-support plate; 11-first rotating shaft; 12-handle; 13-cover plate; 14-pipe joint; 15-connecting column; 16-telescopic rod; 17-nozzle; 18-second pipeline; 19-opening; 20-control panel; 21-fixed shaft; 22-polishing assembly. DETAILED DESCRIPTION

[0024] The following embodiments are described in detail, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numbers in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following embodiments are not intended to represent all possible implementations consistent with the present application. They are merely examples of systems and methods consistent with certain aspects of the present application, as detailed in the claims.

[0025] When using automated polishing equipment to polish cold-rolled steel sheets, some automated polishing devices only polish the surface of the steel sheet without cleaning it afterward. Therefore, impurities adhering to the steel sheet surface cannot be completely removed, resulting in poor polishing results. Other automated polishing devices are unable to automatically change sides after polishing a single side of the steel coil. Due to the heavy weight of the steel sheet, a tedious process of changing sides is required to polish the other side, which increases the time required for coil polishing and reduces polishing efficiency.

[0026] In order to solve the problem that the polishing device has poor polishing effect and cannot automatically change the surface, the embodiment of the present application provides an automatic polishing device for cold-rolled steel plates, see Figure 1-2 , Figure 1 This is a schematic diagram of the main structure of the automatic polishing equipment for cold-rolled steel plates provided in an embodiment of the present application. Figure 2 This is a rear structural schematic diagram of the automatic polishing equipment for cold-rolled steel plates provided in an embodiment of the present application. The equipment includes: a polishing device, a cleaning device, a first cover shell 4, a power supply device 8 and a control panel 20.

[0027] In some embodiments, the first cover shell 4 may be a frame with a rectangular cross-section and open at both ends. In order to improve the strength of the first cover shell 4, the material of the first cover shell 4 may be carbon steel, and the thickness of the top and side surfaces of the first cover shell 4 is at least 2 mm. The power supply device 8 is arranged inside the first cover shell 4 and can be fixed to the bottom surface of the first cover shell 4 by bolts. A first rotating shaft 11 is respectively provided at both ends of the first cover shell 4, and the first rotating shaft 11 is rotatably connected to the middle part of the first cover shell 4. It should be noted that the lowest point of the outer side surface of the first rotating shaft 11 should be higher than the highest point of the power supply device 8. In some embodiments, the first rotating shaft 11 can also be provided in the center position of the first cover shell 4, that is, the number of the first rotating shaft 11 is at least two.

[0028] The polishing device is detachably connected to the top surface of the first housing 4 and is positioned between the two first rotating shafts 11. In some embodiments, the top surface of the first housing 4 can be used as a polishing work surface, i.e., a steel plate can be positioned on the top surface of the first housing 4. The bottom of the polishing device is provided with openings 19, with two openings 19 located on either side of the polishing device near the first rotating shaft 11. By providing openings 19 on both sides of the polishing device, the steel plate can enter the polishing device from one side and exit the polishing device from the other side after being polished. After passing through the polishing device through the openings 19, the steel plate passes through the first housing 4 along the generatrix located at the highest point of the first rotating shafts 11 at both ends.

[0029] The end where the steel plate enters the polishing device is the starting end, and the end where the steel plate's starting end is located is the starting end of the first housing 4. After being polished, the starting end of the steel plate returns to the starting end of the first housing 4 via the first rotating shaft 11. At this time, the polished surface of the steel plate is flipped to face the bottom of the first housing 4, with the unpolished surface facing the polishing device. By providing the first rotating shaft 11 on both sides of the polishing device, the steel plate can be automatically changed in surface, eliminating the need for an operator to perform the change operation.

[0030] The cleaning device includes a liquid storage tank 5, a power pump 7, a pipe assembly and a nozzle 17. The liquid storage tank 5 is detachably connected to the side of the first cover shell 4. The power pump 7 is arranged on the side of the liquid storage tank 5, and the power pump 7 is detachably connected to one end of the pipe assembly; the nozzle 17 is arranged on the top of the polishing device, and the nozzle 17 is detachably connected to the end of the pipe assembly away from the power pump 7. In some embodiments, the liquid storage tank 5 can be a rectangular shell, which can be fixed to the side of the first cover shell 4 by bolts. The body of the power pump 7 is provided with a mounting seat, which can be fixed to the liquid storage tank 5 by bolts. The liquid inlet and liquid outlet of the power pump 7 are arranged in the liquid storage tank 5, and one end of the pipe assembly can be connected to the liquid outlet by threads. The other end of the pipe assembly can be set on the top surface of the polishing device, and the nozzle 17 can be fixed to the pipe assembly by threaded connection, so that the nozzle 17 can be fixed on the top of the polishing device. The liquid storage tank 5 stores water or cleaning liquid. When the steel plate is polished by the polishing device, the power pump 7 is turned on to spray water or cleaning liquid onto the steel plate being polished through the nozzle 17 to clean the steel plate and remove impurities generated during the polishing process.

[0031] The power supply device 8 is electrically connected to the power pump 7, the polishing device, and the control panel 20, respectively. The power supply device 8 is used to provide a stable operating voltage for the power pump 7, the polishing device, and the control panel 20. The control panel 20 is electrically connected to the power pump 7 and the polishing device, respectively. The control panel 20 is used to control the opening or closing of the power pump 7 and the polishing device, as well as to adjust the parameters of the power pump 7 and the polishing device, thereby controlling the nozzle 17 to spray water to clean the surface of the steel plate during the polishing process. The control panel 20 is detachably connected to the side of the first cover 4. In some embodiments, the control panel 20 can be fixed to the side of the first cover 4 away from the liquid storage tank 5 by bolts.

[0032] The above-mentioned automatic polishing equipment for cold-rolled steel plates can clean the steel plates being polished by providing a cleaning device and setting the nozzle 17 in the cleaning device on the top of the polishing device, thereby removing impurities generated during the polishing process and improving the quality of the steel plates; by providing a first rotating shaft 11 on both sides of the polishing device, the polished steel plates are guided from the first rotating shaft 11 on one side to the first rotating shaft 11 on the other side, and the surface of the steel plates can be automatically changed, eliminating the tedious operation of manual surface changing, and solving the problem that the polishing device has poor polishing effect and cannot automatically change the surface.

[0033] See also Figure 3The polishing device includes a second housing 2, a telescopic rod 16, and a polishing assembly 22. The second housing 2 is detachably connected to the top surface of the first housing 4. In some embodiments, the second housing 2 may be a rectangular box structure with an open bottom and the sides fixed to the top surface of the first housing 4 by bolts. Openings 19 are respectively provided on both sides of the second housing 2 near the first rotating shaft 11 so that the steel plate can enter the second housing 2 along the side where the first rotating shaft 11 is located. It can be understood that the opening 19 is an integrally formed structure on the second housing 2, see again Figure 1 In some embodiments, baffles 1 may be provided on both sides of the second cover shell 2 , and the baffles 1 may be detachably connected to the second cover shell 2 , for example, by hinges, to facilitate maintenance of components within the second cover shell 2 .

[0034] The telescopic rod 16 and the polishing assembly 22 are disposed within the second housing 2. One end of the telescopic rod 16 is detachably connected to the top surface of the second housing 2, and the other end of the telescopic rod 16 is detachably connected to the polishing assembly 22, for example, by a threaded connection. The telescopic rod 16 is an electrically powered telescopic rod that automatically extends or retracts when powered, thereby driving the polishing assembly 22 to extend or retract. A grinding disc is disposed within the polishing assembly 22. When powered, the polishing assembly 22 can drive the grinding disc to rotate rapidly to polish the steel plate. The telescopic rod 16 and the polishing assembly 22 are electrically connected to a power supply 8 and a control panel 20, respectively. The power supply 8 provides operating voltage to the telescopic rod 16 and the polishing assembly 22, and the control panel 20 can control the opening and closing of the telescopic rod 16 and the polishing assembly 22. To increase the polishing speed, multiple groups of telescopic rods 16 and polishing assemblies 22 can be disposed within the second housing 2.

[0035] See again Figure 1 In some embodiments, a connecting post 15 may be provided on the top surface of the second housing 2, and the telescopic rod 16 may be detachably connected to the top surface of the second housing 2 via the connecting post 15. When the second housing 2 is thin, it is not possible to provide a thread on the top surface of the second housing 2. Therefore, the connecting post 15 may be provided on the top surface of the second housing 2, and the top end of the telescopic rod 16 may be fixed to the connecting post 15 via a threaded connection.

[0036] The pipeline assembly includes a first pipeline 3, a second pipeline 18 and a pipe joint 14. The pipe joint 14 is detachably connected to the top surface of the second cover shell 2, for example, by a threaded connection. One end of the first pipeline 3 is detachably connected to the power pump 7, and the other end of the first pipeline 3 is connected to one end of the second pipeline 18 through the pipe joint 14. The second pipeline 18 is arranged on the top surface inside the second cover shell 2 and can be fixed to the top surface of the second cover shell 2 by bonding. It can be understood that the second pipeline 18 is arranged horizontally and the first pipeline 3 is arranged vertically. The nozzle 17 is detachably connected to the side wall of the second pipeline 18, for example, the nozzle 17 can be fixed to the side wall of the second pipeline 18 by a threaded connection. After the power pump 7 is turned on, the water or cleaning liquid in the liquid storage tank 5 enters the nozzle 17 through the first pipeline 3, the pipe joint 14 and the second pipeline 18, and sprays water or cleaning liquid onto the steel plate being polished to clean impurities on the steel plate.

[0037] In some embodiments, in order to improve the strength of the rotational connection between the first rotating shaft 11 and the first cover shell 4, fixed shafts 21 can be respectively provided at both ends of the first cover shell 4, and the fixed shafts 21 can be detachably connected to both sides of the first cover shell 4. For example, the fixed shaft 21 can be fixed to the side of the first cover shell 4 by bolts, and the two ends of the first rotating shaft 11 can be respectively inserted into the fixed shaft 21 and rotationally connected to the fixed shaft 21.

[0038] In some embodiments, the apparatus further includes a second rotating shaft 9, which is disposed at both ends of the first housing 4 and is detachably connected to the top of the first housing 4. It is understood that the two second rotating shafts 9 are disposed above the two first rotating shafts 11, and the highest point of the second rotating shaft 9 does not exceed the top surface of the first housing 4. Support plates 10 can be disposed at both ends of the first housing 4, with the two support plates 10 at one end detachably connected to both sides of the first housing 4, such as by bolts. The second rotating shaft 9 is disposed between the two support plates 10, and the second rotating shaft 9 is rotatably connected to the support plate 10 by bolts or pins. The steel plate to be polished is placed on the second rotating shaft 9 and enters the second housing 2 through the second rotating shaft 9 and the opening 19. Since the second rotating shaft 9 is rotatable, the steel plate can be conveniently pushed into the polishing device.

[0039] The top surface of the liquid storage tank 5 is provided with a cover 13, which is hingedly connected to the liquid storage tank 5. By opening the cover 13, an antioxidant solvent can be added to the liquid storage tank 5. In some embodiments, a handle 12 can be provided on the top surface of the cover 13 to facilitate opening the cover 13. A water inlet 6 is provided on the side of the liquid storage tank 5 and is fixedly connected to the side of the liquid storage tank 5, for example, by welding the water inlet 6 to the side of the liquid storage tank 5.

[0040] When polishing is required, the leading end of the cold-rolled steel plate to be polished is placed on the second rotating shaft 9 at one end of the first housing 4 and pushed toward the polishing device. When the plate enters the second housing 2 through the opening 19, a button on the control panel 20 is pressed to extend the telescopic rod 16 and activate the polishing assembly 22 to polish the plate. Simultaneously, the power pump 7 is activated, causing the nozzle 17 to spray water onto the plate being polished. The plate is slowly pushed until the leading end extends through the opening 19 on the other side. The leading end of the plate is then placed on the first rotating shaft 11 at the other end, moving within the first housing 4 toward the starting end until polishing is complete and the plate is automatically refaced. The other end of the plate opposite the leading end is the trailing end of the plate. It is understood that after the plate is automatically refaced, the trailing end of the plate is closer to the starting end of the first housing 4. Once the trailing end of the plate is placed on the second rotating shaft 9, polishing of the other side of the plate can begin.

[0041] As can be seen from the above technical solution, the present embodiment provides an automatic polishing device for cold-rolled steel plates, comprising: a polishing device, a cleaning device, a first housing 4, a power supply 8, and a control panel 20. The power supply 8 is disposed within the first housing 4, the polishing device is disposed on the top surface of the first housing 4, and the control panel 20 is disposed on the side of the first housing 4. A first rotating shaft 11 is disposed at each end of the first housing 4, and the first rotating shaft 11 is rotatably connected to the middle portion of the first housing 4. The polishing device is disposed between the two first rotating shafts 11, and an opening 19 is disposed at the bottom. After the steel plate passes through the polishing device through the opening 19, it passes through the first housing 4 via the busbars at the highest points of the first rotating shafts 11 at both ends. The cleaning device includes a liquid reservoir 5, a power pump 7, a pipe assembly, and a nozzle 17. The power pump 7 is detachably connected to one end of the pipe assembly. The nozzle 17 is disposed on the top of the polishing device and detachably connected to the pipe assembly. The power supply 8 is electrically connected to the power pump 7, the polishing device, and the control panel 20, respectively. The control panel 20 is electrically connected to the power pump 7 and the polishing device, respectively. By setting up a cleaning device to automatically clean the steel plate being polished, impurities generated during the polishing process can be removed; by setting a first rotating shaft 11 on both sides of the polishing device, the polished steel plate is guided from the first rotating shaft 11 on one side to the first rotating shaft 11 on the other side, and the surface of the steel plate can be automatically changed, thereby solving the problem that the polishing effect of the polishing device is poor and the surface cannot be changed automatically.

[0042] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without expending creative work shall fall within the scope of protection of this application.

Claims

1. An automatic polishing equipment for cold-rolled steel plates, characterized in that: include: A polishing device, a cleaning device, a first cover (4), a power supply device (8) and a control panel (20); wherein the power supply device (8) is arranged inside the first cover (4), the polishing device is detachably connected to the top surface of the first cover (4), and the control panel (20) is detachably connected to the side surface of the first cover (4); A first rotating shaft (11) is provided at each end of the first cover shell (4), and the first rotating shaft (11) is rotatably connected to the middle of the first cover shell (4); the polishing device is provided between the two first rotating shafts (11), and an opening (19) is provided at the bottom of the polishing device, and the two openings (19) are respectively provided on both sides of the polishing device close to the first rotating shaft (11); after the steel plate passes through the polishing device through the opening (19), it passes through the first cover shell (4) via the generatrix at the highest point of the first rotating shaft (11) at both ends; The cleaning device comprises a liquid storage tank (5), a power pump (7), a pipeline assembly and a nozzle (17); the liquid storage tank (5) is detachably connected to the side of the first housing (4); the power pump (7) is arranged on the side of the liquid storage tank (5); the power pump (7) is detachably connected to one end of the pipeline assembly; the nozzle (17) is arranged on the top of the polishing device; the nozzle (17) is detachably connected to one end of the pipeline assembly away from the power pump (7); The power supply device (8) is electrically connected to the power pump (7), the polishing device, and the control panel (20), respectively; and the control panel (20) is electrically connected to the power pump (7) and the polishing device, respectively.

2. The automatic polishing equipment for cold-rolled steel plates according to claim 1, characterized in that: The polishing device includes a second cover shell (2), a telescopic rod (16) and a polishing assembly (22); the second cover shell (2) is detachably connected to the top surface of the first cover shell (4); the telescopic rod (16) and the polishing assembly (22) are arranged inside the second cover shell (2); one end of the telescopic rod (16) is detachably connected to the top surface of the second cover shell (2), and the other end of the telescopic rod (16) is detachably connected to the polishing assembly (22); the telescopic rod (16) and the polishing assembly (22) are electrically connected to the power supply device (8) and the control panel (20), respectively.

3. The automatic polishing equipment for cold-rolled steel plates according to claim 2, characterized in that: The openings (19) are respectively arranged on both sides of the second cover shell (2) close to the first rotating shaft (11).

4. The automatic polishing equipment for cold-rolled steel plates according to claim 2, characterized in that: The top surface of the second cover shell (2) is provided with a connecting column (15), and the telescopic rod (16) is detachably connected to the top surface of the second cover shell (2) via the connecting column (15).

5. The automatic polishing equipment for cold-rolled steel plates according to claim 2, characterized in that: The pipeline assembly comprises a first pipeline (3), a second pipeline (18) and a pipe joint (14); the pipe joint (14) is detachably connected to the top surface of the second housing (2); one end of the first pipeline (3) is detachably connected to the power pump (7); the other end of the first pipeline (3) is connected to one end of the second pipeline (18) through the pipe joint (14); the second pipeline (18) is arranged on the top surface inside the second housing (2); and the nozzle (17) is detachably connected to the side wall of the second pipeline (18).

6. The automatic polishing equipment for cold-rolled steel plates according to claim 1, characterized in that: Both ends of the first cover shell (4) are respectively provided with fixed shafts (21), and the fixed shafts (21) are detachably connected to both sides of the first cover shell (4), and both ends of the first rotating shaft (11) are respectively rotatably connected to the fixed shafts (21).

7. The automatic polishing equipment for cold-rolled steel plates according to claim 1, characterized in that: It also includes a second rotating shaft (9), which is respectively arranged at both ends of the first cover shell (4), and the second rotating shaft (9) is detachably connected to the top of the first cover shell (4).

8. The automatic polishing equipment for cold-rolled steel plates according to claim 7, characterized in that: Support plates (10) are respectively provided at both ends of the first cover shell (4), wherein the two support plates (10) at one end are respectively detachably connected to the two sides of the first cover shell (4), and the second rotating shaft (9) is provided between the two support plates (10), and the second rotating shaft (9) is rotatably connected to the support plates (10).

9. The automatic polishing equipment for cold-rolled steel plates according to claim 1, characterized in that: The top surface of the liquid storage tank (5) is provided with a cover plate (13), and the cover plate (13) is hinged to the liquid storage tank (5); the side surface of the liquid storage tank (5) is provided with a water inlet (6), and the water inlet (6) is fixedly connected to the liquid storage tank (5).

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