Electric permanent magnet lifting device

Abstract

The utility model discloses an electric permanent magnet lifting device, and relates to the technical field of electromagnetic lifting equipment, the electric permanent magnet lifting device comprises a shell, a sealing plate, a magnetic circuit assembly, a magnetic conducting block and a cooling mechanism, the cooling mechanism is arranged to cool the lifting device, and an air channel is formed between the sealing plate and an air guide plate of the cooling mechanism; the sealing plate at the bottom of the shell serves as a forming part of the air channel, cooling air can make large-area contact with the sealing plate, heat in the shell can exchange heat with the cooling air through the sealing plate, meanwhile, the magnetic conductive block can also exchange heat with the cooling air in the air channel, and therefore the internal magnetic circuit assembly can have a relatively low-temperature working environment; the electric permanent magnet lifting device has the capacity of lifting ultra-high-temperature workpieces, meanwhile, the service life is prolonged, the air channel can be filled with cooling air, and an intangible air heat insulation layer is formed in the air channel so as to block a heat transfer path.

Description

Technical Field

[0001] The present application relates to the technical field of electromagnetic lifting equipment, and in particular to an electric permanent magnet lifting device. Background Art

[0002] The electric permanent magnet lifting equipment is a lifting tool based on the combination of permanent magnet and electromagnetic control technology. The equipment activates the permanent magnet through electromagnetic pulses to generate a magnetic field, which can quickly absorb and release heavy objects. It has the advantages of no need for continuous power supply and high safety.

[0003] The existing electric permanent magnet lifting equipment has the following problems: 1. The cooling system is not efficient enough to cope with the continuous heat radiation of high-temperature workpieces; 2. The electric permanent magnet is in a high-temperature environment for a long time, resulting in irreversible demagnetization of the magnetic material, failure of the insulation of the excitation coil, softening and falling off of the potting glue, etc., which causes a sharp drop in magnetic force and internal damage, affecting the service life. Utility Model Content

[0004] The embodiment of the present application provides an electric permanent magnet lifting device that can effectively cool down and has the ability to lift ultra-high temperature workpieces.

[0005] The present application provides an electric permanent magnet lifting device, comprising an outer shell, a sealing plate, a magnetic circuit assembly, a magnetic conductive block and a cooling mechanism; the bottom of the outer shell is configured as an open end, and the magnetic circuit assembly is arranged in the outer shell; the sealing plate is arranged at the open end to close the outer shell; one side of the magnetic conductive block contacts with the magnetic circuit assembly, and the other side contacts with the workpiece and is used to adsorb the workpiece; the cooling mechanism comprises an air guide plate and a cooling air duct; the air guide plate is arranged on the side of the sealing plate away from the outer shell, and an air duct is formed between the air guide plate and the sealing plate; one end of the cooling air duct is connected with the air duct, and the other end is connected with an external cooling air source; the magnetic conductive block passes through the air guide plate, and at least part of the magnetic conductive block is located in the air duct; the outer shell comprises a shell body and heat dissipation fins arranged on the outside of the shell body; the magnetic circuit assembly is arranged in the shell body, and the sealing plate is arranged at the open end of the shell body; the air guide plate comprises a flat plate portion and an arc-shaped air guide portion; the flat plate portion and the sealing plate are arranged opposite to each other to form an air duct; the arc-shaped air guide portion is arranged at the edge of the flat plate portion, and is used to guide the cooling air in the air duct to the heat dissipation fins.

[0006] The electric permanent magnetic lifting device of the present application has at least the following beneficial effects:

[0007] The electric permanent magnet lifting device of the present application cools the lifting device by arranging a cooling mechanism, and uses the sealing plate at the bottom of the outer shell as a component for forming the air duct. The cooling air and the sealing plate can be in contact with each other over a large area, and the heat inside the outer shell can be exchanged with the cooling air through the sealing plate. At the same time, the magnetic conductive block can also exchange heat with the cooling air in the air duct, so that the internal magnetic circuit components have a relatively low temperature working environment, allowing the electric permanent magnet lifting device to have the ability to lift ultra-high temperature workpieces and increase its service life. In addition, the cooling air can fill the air duct to form an invisible air insulation layer in the air duct to block the heat transfer path. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0009] Figure 1 It is an exploded schematic diagram of the electric permanent magnetic lifting device of the present application;

[0010] Figure 2 is a top view of the electric permanent magnetic lifting device of the present application;

[0011] Figure 3 yes Figure 2 Middle AA schematic diagram;

[0012] Figure 4 It is an exploded schematic diagram of the electric permanent magnetic lifting device of the present application (the outer shell, the first filling layer and the second filling layer are not shown);

[0013] Figure 5 yes Figure 2 Schematic diagram of middle BB (arrows indicate the direction of cooling air);

[0014] Figure 6 yes Figure 4 Bottom view of

[0015] Figure 7 is an exploded schematic diagram of the electric permanent magnetic lifting device of the present application (without illustrating the outer shell);

[0016] Description of the reference numerals is as follows:

[0017] 100, housing; 110, housing body; 120, heat dissipation fins;

[0018] 200, seal the board;

[0019] 300, magnetic circuit assembly; 310, reversible magnet; 320, excitation coil; 330, magnetic pole; 330a, placement slot; 340, permanent magnet; 350, first filling layer; 360, second filling layer;

[0020] 400, magnetic conductive block;

[0021] 500, cooling mechanism; 510, air guide plate; 511, flat plate portion; 512, arc-shaped air guide portion; 520, cooling air duct; 500a, air duct; 530, coolant pipe; 540, heat insulation layer; 550, stopper. DETAILED DESCRIPTION

[0022] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0024] The present embodiment discloses an electric permanent magnet lifting device, which can be used to lift ultra-high temperature workpieces. The ultra-high temperature workpiece of the present embodiment can be a workpiece with a temperature of more than 700 degrees Celsius.

[0025] like Figure 1As shown, the electric permanent magnet lifting device of this embodiment includes a shell 100, a sealing plate 200, a magnetic circuit assembly 300, a magnetic conductive block 400 and a cooling mechanism 500; the shell 100 and the sealing plate 200 cooperate to enclose the magnetic circuit assembly 300 in the shell 100, the magnetic conductive block 400 is a component that is in direct contact with a workpiece (not shown), and can adsorb or release the workpiece under the action of the magnetic field of the magnetic circuit assembly 300, and the cooling mechanism 500 is used to cool down each component, so that the lifting device of this embodiment can be suitable for hoisting high-temperature workpieces.

[0026] like Figure 1 and Figure 2 As shown, in this embodiment, the bottom of the housing 100 is configured as an open end, and the magnetic circuit assembly 300 is assembled inside the housing 100 through the open end. The sealing plate 200 is arranged at the open end of the housing 100, and the magnetic circuit assembly 300 can be enclosed in the housing 100. In some preferred embodiments, the housing 100 includes a housing body 110 and heat dissipation fins 120 arranged outside the housing body 110; the housing body 110 includes a box structure formed by connecting four side walls and a top wall, the bottom of the housing body 110 is configured as the open end, the sealing plate 200 is connected to the housing body 110 to form a relatively closed box, the heat dissipation fins 120 are arranged on the outer side wall of the housing body 110, and the number of the heat dissipation fins 120 is multiple, and the heat dissipation fins 120 are used to dissipate the heat inside the housing 100 to the outside. In this embodiment, a plurality of heat dissipation fins 120 are arranged on the four horizontal outer side walls of the housing body 110.

[0027] like Figure 3 As shown, the sealing plate 200 is detachably disposed on the open end of the shell body 110 , and the detachable manner may be bolt connection or clamping.

[0028] like Figure 4 As shown, the magnetic circuit assembly 300 is disposed in the housing 100, and the magnetic circuit assembly 300 can generate a variable magnetic field, thereby enabling the magnetic conductive block 400 to adsorb or release the workpiece. One side of the magnetic conductive block 400 is connected to and in close contact with the magnetic circuit assembly 300, and the other side of the magnetic conductive block 400 can be in close contact with the workpiece and used to adsorb the workpiece.

[0029] like Figure 5As shown, the cooling mechanism 500 includes an air guide plate 510 and a cooling air duct 520; the air guide plate 510 is arranged on the side of the sealing plate 200 away from the housing 100. In this embodiment, the air guide plate 510 is located on the lower side of the sealing plate 200, and there is a predetermined distance (for example, 2 cm to 10 cm) between the air guide plate 510 and the sealing plate 200, so that an air duct 500a (cooling air duct) is formed between the air guide plate 510 and the sealing plate 200. The cooling air duct 520 is arranged on the housing 100. In this embodiment, three cooling air ducts 520 are arranged in parallel in the horizontal direction, and the upper end of the cooling air duct 520 passes through The lower end of the cooling air duct 520 extends downward through the top wall of the shell body 110, and passes through the sealing plate 200 to communicate with the air duct 500a. The upper end of the cooling air duct 520 is connected to an external cooling air source. The external cooling air source provides cooling air (for example, inert gas) for the cooling air duct 520. The cooling air enters the air duct 500a and almost fills the air duct 500a. Since the sealing plate 200 is a component that forms the air duct 500a, the heat in the outer shell 100 can be heat exchanged with the cooling air in the air duct 500a through the sealing plate 200, thereby achieving cooling of the components in the outer shell 100.

[0030] Please refer again Figure 4 In some preferred embodiments, the cooling mechanism 500 further includes a cooling liquid pipe 530, which is disposed between the magnetic circuit assembly 300 and the magnetic conductive block 400, and can be used to cool the magnetic conductive block 400 and the magnetic circuit assembly 300, wherein the cooling liquid pipe 530 passes through the top wall of the housing 100, and at least part of the cooling liquid pipe 530 is disposed between the magnetic circuit assembly 300 and the magnetic conductive block 400, the liquid inlet and the liquid outlet of the cooling liquid pipe 530 are both located outside the housing 100, and the liquid inlet and the liquid outlet are respectively connected to an external cooling liquid source, so that the cooling liquid (such as fluorinated liquid) can be circulated and cooled, specifically: the external cooling liquid enters the cooling liquid pipe 530 from the liquid inlet, the cooling liquid flows into the housing 100 to take away the heat and then flows out from the liquid outlet, and the cooling liquid with heat is transported back to the liquid inlet after cooling, so as to realize circulated cooling. This embodiment adopts a combination of air cooling and liquid cooling, which can ensure that the magnetic circuit assembly 300 is in a good working environment.

[0031] like Figure 5As shown, in some preferred embodiments, the air guide plate 510 includes a flat plate portion 511 and an arc-shaped air guide portion 512; the flat plate portion 511 and the sealing plate 200 are arranged with a relative spacing up and down, and the air duct 500a is formed between the flat plate portion 511 and the sealing plate 200; the arc-shaped air guide portion 512 is arranged at the edge of the flat plate portion 511, and the arc-shaped air guide portion 512 is used to guide the cooling air in the air duct 500a to the heat dissipation fins 120. After the cooling air has undergone a heat exchange with the sealing plate 200, it undergoes a secondary heat exchange with the heat dissipation fins 120 again, so that the cooling air can be fully utilized to achieve a good cooling effect. Among them, both side edges of the flat plate portion 511 are provided with blocks 550. Specifically, the flat plate portion 511 is configured as a rectangular flat plate. The flat plate portion 511 has four sides, and two opposite sides are respectively provided with arc-shaped air guide portions 512, and one side of the other two opposite sides is provided with blocks 550 (such as Figure 3 As shown in the figure, the upper side of the block 550 is connected to the sealing plate 200 or the outer shell 100, and the block 550 is used to block the cooling air in the air duct 500a on both sides so that the cooling air can only be discharged outward along one side of the arc-shaped air guide portion 512.

[0032] Please refer again Figure 3 In this embodiment, the magnetic conductive block 400 passes through the air guide plate 510 (specifically, the flat plate portion 511) and the sealing plate 200 from bottom to top, and the upper side of the magnetic conductive block 400 is in contact with the magnetic circuit assembly 300, and the lower side of the magnetic conductive block 400 is used to adsorb the workpiece. At least part of the magnetic conductive block 400 is located in the air duct 500a, and the cooling air in the air duct 500a cools the magnetic conductive block 400.

[0033] like Figure 3 and 4 As shown, in this embodiment, the magnetic circuit assembly 300 includes a reversible magnet 310, an excitation coil 320, a magnetic pole 330 and a permanent magnet 340;

[0034] like Figure 3 and 4 As shown, the reversible magnet 310 is disposed inside the housing 100 , and the material of the reversible magnet 310 is an aluminum-nickel-cobalt material with a temperature resistance of 550° C.

[0035] like Figure 3 and 4As shown, the excitation coil 320 is sleeved on the outer periphery of the reversible magnet 310, and the excitation coil 320 is electrically connected to the external energy supply system. The external energy supply system can provide a pulse signal to the excitation coil 320, so that the excitation coil 320 can change the magnetic state of the reversible magnet 310, so that the magnetic fields of the reversible magnet 310 and the permanent magnet 340 are superimposed or offset each other to achieve magnetic attraction or release of the workpiece. In some preferred embodiments, there are four reversible magnets 310, and the four excitation coils 320 are arranged in a one-to-one correspondence with the reversible magnets 310. Among them, the excitation coil 320 is made of ultra-high temperature resistant oxide film aluminum wire to ensure that the excitation coil 320 can still maintain good electrical conductivity and mechanical strength at high temperatures, and mica high temperature wire is used as the internal wiring cable to realize the series or parallel connection between the excitation coils 320. The insulation layer of the excitation coil 320 adopts a multi-layer composite insulation structure, and the composite insulation structure includes a ceramic fiber layer and a polyimide coating wrapped in sequence.

[0036] like Figure 3 and 4 As shown, the magnetic pole 330 is arranged on the lower surface of the reversible magnet 310, and the material of the magnetic pole 330 is configured as iron-cobalt-vanadium material. The magnetic pole 330 can form a magnetic circuit with the reversible magnet 310, the excitation coil 320 and the permanent magnet 340. The magnetic pole 330 and the reversible magnet 310 are arranged one by one.

[0037] like Figure 3 and 4 As shown, the permanent magnet 340 is disposed on one horizontal side of the magnetic pole 330. In this embodiment, two permanent magnets 340 are disposed on two horizontal sides of the magnetic pole 330. The material of the permanent magnet 340 is samarium cobalt.

[0038] like Figure 4 and Figure 6 As shown, in this embodiment, the upper side of the magnetic conductive block 400 is in contact with the lower surface of the magnetic pole 330, and the cooling liquid pipe 530 of the cooling mechanism 500 is arranged between the magnetic conductive block 400 and the magnetic pole 330. In some preferred embodiments, a placement groove 330a is arranged on the side (i.e., the lower side) of the magnetic pole 330 facing the magnetic conductive block 400, and the trajectory line of the placement groove 330a is curved in the horizontal plane, and the trajectory line of the cooling liquid pipe 530 arranged between the magnetic conductive block 400 and the magnetic pole 330 is also curved, so that the cooling liquid pipe 530 can be completely embedded in the placement groove 330a.

[0039] like Figure 3 , Figure 5 as well as Figure 7As shown, in some preferred embodiments, there are multiple (four in this embodiment) reversible magnets 310, excitation coils 320 and magnetic poles 330, and the reversible magnets 310, excitation coils 320 and magnetic poles 330 are arranged in one-to-one correspondence, wherein a first filling layer 350 is arranged between two adjacent excitation coils 320 and between the excitation coil 320 and the inner circumferential wall of the outer shell 100, and the material of the first filling layer 350 is configured as silicone (modified silicone).

[0040] like Figure 3 , Figure 5 as well as Figure 7 As shown, in some preferred embodiments, a second filling layer 360 is provided between the magnetic pole 330 and the inner peripheral wall of the housing 100 and between the permanent magnet 340 and the inner peripheral wall of the housing 100, and the material of the second filling layer 360 is refractory cement. Using modified silica gel and refractory cement as the filling layer for electric permanent magnet potting can improve the overall temperature resistance and sealing performance.

[0041] like Figure 3 As shown, in some preferred embodiments, a heat insulating layer 540 is provided on the side of the sealing plate 200 facing away from the air guide plate 510, the lower surface of the heat insulating layer 540 is in contact with the upper surface of the sealing plate 200, and the upper surface of the heat insulating layer 540 is in contact with the lower surface of the magnetic pole 330, and the material of the heat insulating layer 540 is configured as aluminum silicate or ceramic fiber. In this embodiment, the heat insulating layer 540 is designed to raise the magnetic pole 330, increase the distance of heat conduction, and help the heat to be dissipated into the air faster. Among them, the magnetic conductive block 400 passes upward through the heat insulating layer 540 and contacts the magnetic pole 330.

[0042] In this embodiment, the electric permanent magnetic lifting device further includes a first temperature sensor, a second temperature sensor and a third temperature sensor. The first temperature sensor is arranged on the magnetic conductive block 400 to detect the temperature of the workpiece; the second temperature sensor is arranged on the excitation coil 320 to detect the temperature of the excitation coil 320; the third temperature sensor is arranged on the permanent magnet 340 to detect the temperature of the permanent magnet 340. The first temperature sensor, the second temperature sensor and the third temperature sensor are all electrically connected to the external control system. In this embodiment, a Hall effect magnetic sensor is arranged in the housing 100 to monitor the magnitude of the magnetic force in real time, and the magnetic sensor is electrically connected to the external control system.

[0043] The working principle of the electric permanent magnetic lifting device of this embodiment is as follows:

[0044] The electric permanent magnetic lifting device is installed under the crane hook, and the material suction and discharge work is started by wireless remote control.

[0045] After working continuously for a period of time, when the temperature of the permanent magnet 340 or the temperature of the excitation coil 320 reaches the set temperature, the external control system automatically switches to the high temperature mode, so that the cooling mechanism 500 starts to work, and the cooling wind (inert gas) forms an invisible air insulation layer in the air duct 500a, and the coolant circulates to take away the heat, and then adjusts the magnetic gear according to the temperature sensor, and the magnetic sensor detects the actual magnetic force size and feeds back data to judge the magnetization effect to maintain the rated adsorption force.

[0046] The electric permanent magnetic lifting device of this embodiment has the following improvements:

[0047] 1. Select various high temperature resistant materials to improve the temperature resistance level;

[0048] 2. Co-design of materials and cooling mechanisms to break through the temperature limitations of traditional electric permanent magnetic lifting devices.

[0049] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. An electric permanent magnetic lifting device, characterized in that: It includes a shell, a sealing plate, a magnetic circuit component, a magnetic conductive block and a cooling mechanism; The bottom of the shell is configured as an open end, and the magnetic circuit component is arranged in the shell; the sealing plate is arranged at the open end to close the shell; one side of the magnetic conductive block contacts the magnetic circuit component, and the other side contacts the workpiece and is used to adsorb the workpiece; The cooling mechanism comprises an air guide plate and a cooling air duct; the air guide plate is arranged on the side of the sealing plate away from the shell, and an air duct is formed between the air guide plate and the sealing plate; one end of the cooling air duct is connected to the air duct, and the other end is connected to an external cooling air source; the magnetic conductive block passes through the air guide plate, and at least part of the magnetic conductive block is located in the air duct; The housing comprises a housing body and heat dissipation fins arranged outside the housing body; the magnetic circuit assembly is arranged in the housing body, and the sealing plate is arranged at an open end of the housing body; The air guide plate includes a flat plate portion and an arc-shaped air guide portion; the flat plate portion is arranged opposite to the sealing plate to form the air duct; the arc-shaped air guide portion is arranged at the edge of the flat plate portion to guide the cooling air in the air duct to the heat dissipation fins.

2. The electric permanent magnetic lifting device according to claim 1, characterized in that: The cooling mechanism also includes a cooling liquid pipe, which is arranged between the magnetic circuit assembly and the magnetic conductive block, and the liquid inlet and the liquid outlet of the cooling liquid pipe are respectively connected to the external cooling liquid source, so as to realize cooling by cooling liquid circulation.

3. The electric permanent magnetic lifting device according to claim 2, characterized in that: The magnetic circuit assembly includes a reversible magnet, an excitation coil, a magnetic pole and a permanent magnet; the excitation coil is sleeved on the reversible magnet; the magnetic pole is located on one side of the reversible magnet; the permanent magnet is fitted on one side of the magnetic pole; one side of the magnetic conductive block is in contact with the magnetic pole; and the coolant pipe is arranged between the magnetic conductive block and the magnetic pole.

4. The electric permanent magnetic lifting device according to claim 3, characterized in that: A placement groove is arranged on one side of the magnetic pole facing the magnetic guide block, and the coolant pipe is arranged in the placement groove.

5. The electric permanent magnetic lifting device according to claim 3, characterized in that: A plurality of reversible magnets and excitation coils are provided, and the reversible magnets and excitation coils are provided in one-to-one correspondence; a first filling layer is provided between two adjacent excitation coils and between the excitation coil and the shell.

6. The electric permanent magnetic lifting device according to claim 3, characterized in that: A second filling layer is arranged between the magnetic pole and the shell and between the permanent magnet and the shell.

7. The electric permanent magnetic lifting device according to any one of claims 3 to 6, characterized in that: A heat insulation layer is arranged on the side of the sealing plate facing away from the air guide plate, and the magnetic conductive block passes through the heat insulation layer.

8. The electric permanent magnetic lifting device according to any one of claims 3 to 6, characterized in that: It also includes a first temperature sensor arranged on the magnetic conductive block, a second temperature sensor arranged on the excitation coil and a third temperature sensor arranged on the permanent magnet.

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