A magnetic powder transfer method

Abstract

An embodiment of the present invention provides a magnetic powder transfer method, including providing a first sealed can and a second sealed can filled with magnetic powder; connecting the can mouth of the first sealed can and the can mouth of the second sealed can, the can mouth height of the first sealed can is lower than the can mouth height of the second sealed can; pressurizing the second sealed can so that the pressure in the first sealed can is lower than the pressure in the second sealed can; connecting the first sealed can and the second sealed can, using the pressure difference between the first sealed can and the second sealed can to transfer the magnetic powder in the second sealed can to the first sealed can; wherein, during the magnetic powder transfer process, the pressure in the first sealed can is controlled to be always lower than the pressure in the second sealed can until the height of the magnetic powder in the first sealed can reaches a set value. The magnetic powder transfer method of this embodiment effectively improves the efficiency and safety of magnetic powder transfer.

Description

Technical Field

[0001] The embodiments of the present invention belong to the technical field of magnetic powder transfer, and in particular relate to a method for magnetic powder transfer. Background Art

[0002] At present, most magnetic steel plants use sealed tanks for magnetic powder storage and processing. However, when extracting and replacing the tank, most of the time, a glove box is needed as a transition. Some areas that do not use glove boxes as transition chambers use flexible connecting pipes for connection, during which the powder conduction efficiency is very low and there is a high risk (there is a risk of magnetic powder burning when the pipe mouth is disconnected). Summary of the invention

[0003] The embodiments of the present invention aim to solve at least one of the technical problems existing in the prior art and provide a magnetic powder transfer method.

[0004] An embodiment of the present invention provides a magnetic powder transfer method, the method comprising:

[0005] Providing a first sealed tank and a second sealed tank containing magnetic powder;

[0006] Connecting the mouth of the first sealed can to the mouth of the second sealed can; wherein the height of the mouth of the first sealed can is lower than the height of the mouth of the second sealed can;

[0007] Pressurizing the second sealed tank so that the pressure in the first sealed tank is lower than the pressure in the second sealed tank;

[0008] The first sealed can and the second sealed can are connected, and the magnetic powder in the second sealed can is transferred to the first sealed can by using the pressure difference between the first sealed can and the second sealed can; wherein,

[0009] During the magnetic powder transfer process, the pressure in the first sealed tank is controlled to be always lower than the pressure in the second sealed tank until the height of the magnetic powder in the first sealed tank reaches a set value.

[0010] Optionally, after the height of the magnetic powder in the first sealed tank reaches a set value, the method further includes:

[0011] releasing the conductive state between the first sealed can and the second sealed can;

[0012] Reversing the first sealed can and the second sealed can as a whole so that the can opening height of the first sealed can is higher than the can opening height of the second sealed can;

[0013] The mouth of the second sealed can is opened, and the second sealed can is depressurized and knocked, so that the magnetic powder at the mouth of the second sealed can flows back into the second sealed can.

[0014] Optionally, before conducting the first sealed can and the second sealed can, the method further includes:

[0015] The first sealed can is deoxygenated until the oxygen content in the first sealed can reaches a threshold value.

[0016] Optionally, the axes of the first sealed pot and the second sealed pot coincide with each other and are both perpendicular to a horizontal plane, and during the magnetic powder transfer process, the second sealed pot is located above the first sealed pot.

[0017] Optionally, during the magnetic powder transfer process, the method further comprises:

[0018] The magnet is brought into contact with the outer surface of the first sealed can and moved along the axial direction of the first sealed can;

[0019] The position of the magnet when being magnetically fixed to the magnetic powder in the first sealed can is determined as the height of the magnetic powder in the first sealed can.

[0020] Optionally, during the magnetic powder transfer process, the method further comprises:

[0021] The magnet is brought into contact with the outer surface of the second sealed can and is moved along the axial direction of the second sealed can;

[0022] If the magnet is fixed by magnetic attraction, it is determined that there is residual magnetic powder in the second sealed can, and the second sealed can is knocked.

[0023] Optionally, pressurizing the second sealed tank comprises:

[0024] The second sealed can is filled with nitrogen.

[0025] Optionally, controlling the pressure in the first sealed tank to be always lower than the pressure in the second sealed tank until the height of the magnetic powder in the first sealed tank reaches a set value includes:

[0026] When the set value is set to be lower than the height of the pressure relief port of the first sealed tank, the first sealed tank is intermittently pressure relieved;

[0027] When the set value is set to be not lower than the height of the pressure relief port of the first sealed tank, the first sealed tank is intermittently depressurized, and when the height of the magnetic powder in the first sealed tank reaches the height of its pressure relief port, the depressurization of the first sealed tank is stopped, and the second sealed tank is pressurized.

[0028] Optionally, the connecting the tank opening of the first sealed tank and the tank opening of the second sealed tank comprises:

[0029] If the opening of the first sealed can and the opening of the second sealed can are of the same size, the opening of the second sealed can is directly connected to the opening of the first sealed can;

[0030] If the size of the can mouth of the first sealed can and the can mouth of the second sealed can are different, the can mouth of the first sealed can and the can mouth of the second sealed can are connected by a funnel-shaped conversion device.

[0031] Optionally, the method further comprises:

[0032] By arranging a first valve on the side wall of the first sealed can, pressure relief of the first sealed can is achieved;

[0033] The second sealed tank is provided with a second valve on the side wall thereof to achieve pressurization and pressure relief of the second sealed tank.

[0034] The magnetic powder transfer method of the embodiment of the present invention effectively improves the efficiency and safety of magnetic powder transfer, and can quickly and safely transfer magnetic powder from one sealed tank to another sealed tank, greatly improving the operating efficiency of operators and saving equipment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic flow chart of a magnetic powder transfer method according to an embodiment of the present invention;

[0036] Figure 2 It is a schematic diagram of the application of a magnetic powder transfer method according to another embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] like Figure 1 As shown, a magnetic powder transfer method 100, the method 100 comprises:

[0039] S110, providing a first sealed can and a second sealed can filled with magnetic powder.

[0040] Specifically, in this step, a first sealed can and a second sealed can filled with magnetic powder are provided respectively. The first sealed can is an empty can. Subsequently, the magnetic powder in the second sealed can needs to be transferred to the first sealed can. The specific transfer method is described below.

[0041] S120, connecting the can mouth of the first sealed can and the can mouth of the second sealed can. The can mouth height of the first sealed can is lower than the can mouth height of the second sealed can.

[0042] Specifically, in this step, the opening of the first sealed can and the opening of the second sealed can are connected, and the height of the opening of the first sealed can is ensured to be lower than the height of the opening of the second sealed can. During the connection process, if the opening of the first sealed can and the opening of the second sealed can are the same size, the opening of the second sealed can is directly connected to the opening of the first sealed can. If the opening of the first sealed can and the opening of the second sealed can are different in size, the opening of the first sealed can and the opening of the second sealed can are connected through a funnel-shaped conversion device.

[0043] Furthermore, the first sealed can is deoxygenated until the oxygen content in the first sealed can reaches a threshold value. As a specific example, the air in the first sealed can can be replaced by an inert gas, and the oxygen content in the first sealed can can be detected by an oxygen detector, and the replacement can be stopped when the oxygen content in the first sealed can reaches a threshold value. The required threshold value can be set according to different types of magnetic powder, and this embodiment does not limit this. Making the oxygen content in the first sealed can reach the threshold value can effectively prevent the oxidation of the magnetic powder when storing the magnetic powder, maintain the purity and performance of the magnetic powder, and extend its service life. It can also effectively avoid the phenomenon of magnetic powder combustion caused by excessive oxygen content in the first sealed can.

[0044] S130: pressurize the second sealed can so that the pressure in the first sealed can is lower than the pressure in the second sealed can.

[0045] Specifically, in this step, nitrogen can be filled into the second sealed can to ensure that the pressure in the second sealed can is greater than the pressure in the first sealed can, and then the relevant operations of magnetic powder transfer are continued.

[0046] S140, connecting the first sealed can and the second sealed can, and utilizing the pressure difference between the first sealed can and the second sealed can to transfer the magnetic powder in the second sealed can to the first sealed can.

[0047] Specifically, in this step, a butterfly valve is provided at the mouth of the first sealed can and the mouth of the second sealed can. When the first sealed can and the second sealed can need to be connected, the butterfly valves at the mouths of the two cans are opened for connection. As a specific example, the axes of the first sealed can and the second sealed can coincide and are both perpendicular to the horizontal plane, and during the magnetic powder transfer process, the second sealed can is located above the first sealed can. The mouths of the first sealed can and the second sealed can are directly connected, and a sealing ring is also provided at the connection between the two for sealing.

[0048] Open the butterfly valves at the openings of the first sealed tank and the second sealed tank, and the two are connected. Since the second sealed tank has been pressurized first, the pressure inside the second sealed tank is greater than the pressure inside the first sealed tank, so when the two are connected, the magnetic powder will be sprayed from the second sealed tank into the first sealed tank.

[0049] S150. During the magnetic powder transfer process, control the pressure in the first sealed tank to be always lower than the pressure in the second sealed tank until the height of the magnetic powder in the first sealed tank reaches a set value.

[0050] In this step, refer to Figure 2 To illustrate, as a specific example, first place the second sealed tank 220 above the first sealed tank 210, and connect the tank openings of the two. Exhaust oxygen from the first sealed tank 210, and pressurize the second sealed tank 220. At the same time, open the butterfly valves at the tank openings of the two tanks, so that the tank openings of the first sealed tank 210 and the second sealed tank 220 are connected to transfer magnetic powder, and the magnetic powder will be sprayed from the second sealed tank 220 into the first sealed tank 210.

[0051] It should be noted that if the set value is set to be lower than the height of the pressure relief port of the first sealed tank 210, then during the transfer of magnetic powder, the first sealed tank 210 needs to be intermittently depressurized through the first valve 211 provided on the side wall of the first sealed tank 210 to ensure that the pressure in the first sealed tank 210 is always lower than the pressure in the second sealed tank 220, so that the second sealed tank 220 and the first sealed tank 210 form an hourglass state with different upper and lower pressures as a whole. In this way, the magnetic powder can be continuously ejected from the second sealed tank 220 to the first sealed tank 210 under the pressure difference between the second sealed tank 220 and the first sealed tank 210.

[0052] If the set value is set to be not less than the pressure relief port height of the first sealed can 210, then during the transfer of magnetic powder, the first sealed can 210 is intermittently depressurized through the first valve 211 provided on the side wall of the first sealed can 210. When the height of the magnetic powder in the first sealed can 210 reaches the height of its pressure relief port, that is, when it reaches the position of the first valve 211, the depressurization operation of the first sealed can 210 is stopped, and the second sealed can 220 can be pressurized through the second valve 221 provided on the side wall of the second sealed can 220, so as to keep the pressure in the first sealed can 210 always lower than the pressure in the second sealed can 220, until the height of the magnetic powder in the first sealed can 210 reaches the set value. Under the pressure difference between the second sealed can 220 and the first sealed can 210, the magnetic powder can be continuously sprayed from the second sealed can 220 into the first sealed can 210. When the height of the magnetic powder in the first sealed tank 210 reaches a set value, the operations related to the transfer of the magnetic powder can be stopped, and the butterfly valves at the tank openings of the first sealed tank 210 and the second sealed tank 220 can be closed.

[0053] The set value of the magnetic powder height can be set to the full state of the first sealed can. Of course, it can also be set to other height states, such as the height state of the pressure relief port of the first sealed can, the height state below the pressure relief port of the first sealed can, etc. The set value can be set according to the actual application situation, and this embodiment does not limit this.

[0054] It should be noted that the specific process of determining the height of the magnetic powder is as follows: the magnet is brought into contact with the outer surface of the first sealed can 210 and moves along the axial direction of the first sealed can 210. Of course, the magnet can also be controlled to move around the circumference of the second sealed can 220 during the axial movement of the second sealed can 220. The position where the magnet and the magnetic powder in the first sealed can 210 are magnetically fixed is determined as the height of the magnetic powder in the first sealed can 210.

[0055] It should be noted again that, during the transfer of magnetic powder, the magnet can also be brought into contact with the outer surface of the second sealed can 220 and moved along the axial direction of the second sealed can 220. Of course, the magnet can also be controlled to move around the circumference of the second sealed can 220 during the axial movement of the second sealed can 220. If the magnet is fixed by magnetic attraction, it is determined that there is residual magnetic powder in the second sealed can 220, and the second sealed can 220 is knocked.

[0056] Specifically, if the magnet determines that there is residual magnetic powder in the second sealed can 220, the second sealed can 220 is knocked so that the residual magnetic powder therein can be transferred into the first sealed can 210. During the knocking process, the second sealed can 220 can be knocked with a rubber hammer, and the knocking force and knocking frequency can be adjusted according to the characteristics of the specific magnetic powder, but at the same time, the tank body of the second sealed can 220 must be considered to avoid damaging the tank body.

[0057] Further, continue to refer to Figure 2 After the height of the magnetic powder in the first sealed can 210 reaches the set value, the conductive state between the first sealed can 210 and the second sealed can 220 is released, that is, the conductive state between the first sealed can 210 and the second sealed can 220 is released by closing the butterfly valve at the can mouth of the first sealed can 210 and the second sealed can 220. The first sealed can 210 and the second sealed can 220 are further reversed as a whole, so that the can mouth height of the first sealed can 210 is higher than the can mouth height of the second sealed can 220, and the first sealed can 210 is located above the second sealed can 220.

[0058] Open the mouth of the second sealed can 220, that is, open the butterfly valve at the mouth of the second sealed can 220. Depressurize and knock the second sealed can 220 so that the magnetic powder at the mouth of the second sealed can 220 flows back into the second sealed can 220. At this time, the second sealed can 220 can be depressurized by the second valve 221 provided on the side wall of the second sealed can 220, and at the same time, knock the bottom of the mouth of the second sealed can 220 so that the residual magnetic powder at the mouth of the second sealed can 220 can flow back into the second sealed can 220. Then close the butterfly valve at the mouth of the second sealed can 220, separate and disconnect the connection between the first sealed can 210 and the second sealed can 220, and the whole magnetic powder transfer process ends.

[0059] The magnetic powder transfer method of the embodiment of the present invention can effectively improve the efficiency and safety of magnetic powder transfer, and can quickly and safely transfer magnetic powder from one sealed tank to another sealed tank, greatly improving the operating efficiency of operators and saving equipment costs.

[0060] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A magnetic powder transfer method, characterized in that: The method comprises: Providing a first sealed tank and a second sealed tank containing magnetic powder; Connecting the mouth of the first sealed can to the mouth of the second sealed can; wherein the height of the mouth of the first sealed can is lower than the height of the mouth of the second sealed can; Pressurizing the second sealed tank so that the pressure in the first sealed tank is lower than the pressure in the second sealed tank; The first sealed can and the second sealed can are connected, and the magnetic powder in the second sealed can is transferred to the first sealed can by using the pressure difference between the first sealed can and the second sealed can; wherein, During the magnetic powder transfer process, the pressure in the first sealed tank is controlled to be always lower than the pressure in the second sealed tank until the height of the magnetic powder in the first sealed tank reaches a set value.

2. The magnetic powder transfer method according to claim 1, characterized in that: After the height of the magnetic powder in the first sealed tank reaches a set value, the method further includes: releasing the conductive state between the first sealed can and the second sealed can; Reversing the first sealed can and the second sealed can as a whole so that the can opening height of the first sealed can is higher than the can opening height of the second sealed can; The mouth of the second sealed can is opened, and the second sealed can is depressurized and knocked, so that the magnetic powder at the mouth of the second sealed can flows back into the second sealed can.

3. The magnetic powder transfer method according to claim 1, characterized in that: Before conducting the first sealed can and the second sealed can, the method further includes: The first sealed can is deoxygenated until the oxygen content in the first sealed can reaches a threshold value.

4. The magnetic powder transfer method according to claim 1, characterized in that: The axes of the first sealed pot and the second sealed pot coincide with each other and are both perpendicular to a horizontal plane, and during the magnetic powder transfer process, the second sealed pot is located above the first sealed pot.

5. The magnetic powder transfer method according to claim 1, characterized in that: During the magnetic powder transfer process, the method further comprises: The magnet is brought into contact with the outer surface of the first sealed can and is moved along the axial direction of the first sealed can; The position of the magnet when being magnetically fixed to the magnetic powder in the first sealed can is determined as the height of the magnetic powder in the first sealed can.

6. The magnetic powder transfer method according to claim 1, characterized in that: During the magnetic powder transfer process, the method further comprises: The magnet is brought into contact with the outer surface of the second sealed can and is moved along the axial direction of the second sealed can; If the magnet is fixed by magnetic attraction, it is determined that there is residual magnetic powder in the second sealed can, and the second sealed can is knocked.

7. The magnetic powder transfer method according to claim 1, characterized in that: The step of pressurizing the second sealed tank comprises: The second sealed can is filled with nitrogen.

8. The magnetic powder transfer method according to any one of claims 2 to 7, characterized in that: The step of controlling the pressure in the first sealed tank to be always lower than the pressure in the second sealed tank until the height of the magnetic powder in the first sealed tank reaches a set value comprises: When the set value is set to be lower than the height of the pressure relief port of the first sealed tank, the first sealed tank is intermittently pressure relieved; When the set value is set to be not lower than the height of the pressure relief port of the first sealed tank, the first sealed tank is intermittently depressurized, and when the height of the magnetic powder in the first sealed tank reaches the height of its pressure relief port, the depressurization of the first sealed tank is stopped, and the second sealed tank is pressurized.

9. The magnetic powder transfer method according to any one of claims 1 to 6, characterized in that: The method of connecting the tank opening of the first sealed tank and the tank opening of the second sealed tank comprises: If the size of the opening of the first sealed can is the same as the opening of the second sealed can, the opening of the second sealed can is directly connected to the opening of the first sealed can; If the size of the can mouth of the first sealed can and the can mouth of the second sealed can are different, the can mouth of the first sealed can and the can mouth of the second sealed can are connected by a funnel-shaped conversion device.

10. The magnetic powder transfer method according to claim 8, characterized in that: The method further comprises: By arranging a first valve on the side wall of the first sealed can, the pressure relief of the first sealed can is achieved; The second sealed tank is provided with a second valve on the side wall thereof to achieve pressurization and pressure relief of the second sealed tank.

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