Adsorption mechanism for steel belt uncoiling and uncoiling device

Abstract

The utility model discloses an adsorption mechanism for steel belt uncoiling and an uncoiling device, and relates to the field of production equipment.The adsorption mechanism comprises a main body shell, a first annular electric permanent magnet assembly and a second annular electric permanent magnet assembly, the first annular electric permanent magnet assembly comprises a plurality of first electric permanent magnets, and the second annular electric permanent magnet assembly comprises a plurality of second electric permanent magnets; the multiple first electric permanent magnets and the multiple second electric permanent magnets which are arranged in a surrounding mode are attracted to the axial end face of the steel coil so that the steel coil can be driven to rotate and uncoil, every two adjacent electric permanent magnets in the radial direction are matched in a concave-convex mode, and after installation, the radial installation gap of the two electric permanent magnets is smaller than a set threshold value; through the design of concave-convex matching and installation gap reduction, an annular area between two electric permanent magnets in the prior art can be eliminated, namely, a magnetic force abrupt drop area is eliminated, the situations of layer staggering, folding and the like of a steel coil in the uncoiling process are avoided, the uncoiling device comprises a device body, a main shaft and an adsorption mechanism, and the adsorption mechanism is driven by the main shaft to rotate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of production equipment, in particular to an adsorption mechanism for steel strip uncoiling and an uncoiling device. BACKGROUND

[0002] The steel coil is a common material. The steel coil needs to be connected to the uncoiling device when used. The steel coil is placed vertically in the cooling workshop in the previous process. Since it is placed after being extracted from the high-temperature furnace, the coil is in a relatively loose state, resulting in uneven interlayer bonding force, and the end face of the steel coil forms a concave shape, as shown in Figure 1 .

[0003] In the prior art, 1. Chinese patent CN223070166U discloses an electric permanent magnet uncoiling device, which discloses: a main body plate and a plurality of annular electric permanent magnet assemblies; the plurality of annular electric permanent magnet assemblies have different inner diameters and are coaxially sleeved along the radial direction of the main body plate in sequence, and the axial side of the steel coil is adsorbed by the annular electric permanent magnet assembly. The defects of this patent are that there is an annular blank area between the two annular electric permanent magnet assemblies adjacent in the radial direction. This annular area is a neutral area, and the magnetic force will drop sharply. However, in the actual working process, this annular area and the inner ring area are the most critical places (especially the inner ring area), and the magnetic force must be large, otherwise the steel coil may appear misaligned, creases, etc. during the uncoiling process; 2. The Chinese patent CN223070166U lacks effective means to solve the defect that the end face of the steel coil forms a concave shape. CONTENT OF THE UTILITY MODEL

[0004] The present application provides an adsorption mechanism for steel strip uncoiling and an uncoiling device, which can eliminate the magnetic force drop area and avoid the occurrence of misalignment, creases, etc. during the uncoiling process of the steel coil.

[0005] In a first aspect, the present application provides an adsorption mechanism for steel strip uncoiling, comprising a main body shell, a first annular electric permanent magnet assembly, and a second annular electric permanent magnet assembly.

[0006] The main body shell is provided with a shaft hole;

[0007] The first annular electric permanent magnet assembly comprises a plurality of first electric permanent magnets arranged axially around the shaft hole in the main body shell;

[0008] The second annular electric permanent magnet assembly comprises a plurality of second electric permanent magnets arranged axially on the inner side of the first annular electric permanent magnet assembly around the shaft hole; the first electric permanent magnets and the second electric permanent magnets are arranged one by one in the radial direction of the shaft hole;

[0009] The first electric permanent magnet is provided with a protruding portion, and the second electric permanent magnet is provided with a groove; in the radial direction of the shaft hole, the protruding portion is inserted into the groove, so that the installation gap of the first electric permanent magnet and the second electric permanent magnet in the radial direction is less than a set threshold value.

[0010] Preferably, the main body shell comprises a bottom plate, a peripheral plate and an inner peripheral plate, the bottom plate is provided with a shaft hole, the bottom plate is provided with a stepped surface, a first annular step of the stepped surface is used for mounting the first annular electromagnet-permanent magnet assembly, a second annular step of the stepped surface is used for mounting the second annular electromagnet-permanent magnet assembly, the peripheral plate is coaxially arranged at the edge position of the bottom plate, and the inner peripheral plate is coaxially arranged at the hole opening end surface of the shaft hole.

[0011] Preferably, the first electromagnet-permanent magnet comprises a first excitation magnet, a first permanent magnet and a first magnetic pole, the first excitation magnet is arranged in the main body shell, the first permanent magnet is arranged outside the first magnetic pole, the first magnetic pole is arranged on one side of the first excitation magnet, the first magnetic pole is provided with the protruding part, and the protruding part is arranged in the groove so that the installation gap of the first electromagnet-permanent magnet and the second electromagnet-permanent magnet in the radial direction is less than a set threshold value.

[0012] Preferably, the bottom of the protruding part is provided with a first inclined surface.

[0013] Preferably, the second electromagnet-permanent magnet comprises a second excitation magnet, a second permanent magnet and a second magnetic pole, the second excitation magnet is arranged in the main body shell, the second permanent magnet is arranged outside the second magnetic pole, the second magnetic pole is arranged on one side of the second excitation magnet, and the second magnetic pole is provided with the groove.

[0014] Preferably, the second magnetic pole comprises a first part and a second part in the radial direction, the first part is located on one side close to the shaft hole, the magnetic pole surface of the second part is provided with a sink groove for reducing the magnetic pole area of the second part, and the groove is arranged on the second part.

[0015] Preferably, the sink groove is configured as a V-shaped groove, the sink groove is divided into a through groove part and a blind groove part in the radial direction, the length ratio of the through groove part to the blind groove part is 1:8 to 1:4, and the through groove part is configured as the groove.

[0016] Preferably, a second inclined surface is arranged between the inner bottom surface of the sink groove and the front side surface of the second part, the front side surface of the second part is perpendicular to the radial direction, and a space gap is arranged between the second inclined surface and the lower surface of the protruding part.

[0017] Preferably, the first part is provided with an extension part extending in the radial direction, the shaft hole of the main body shell is coaxially provided with an inner peripheral plate, the inner peripheral plate is provided with a clamping groove, and the extension part is arranged in the clamping groove.

[0018] In a second aspect, the application provides an uncoiling device, comprising a device main body, a main shaft and an adsorption mechanism, the device main body is connected with the main shaft and used for driving the main shaft to rotate, the shaft hole of the adsorption mechanism is coaxially arranged on the main shaft, and the first annular electromagnet-permanent magnet assembly and the second annular electromagnet-permanent magnet assembly of the adsorption mechanism are used for adsorbing a steel coil to be uncoiled.

[0019] The adsorption mechanism of the application has at least the following beneficial effects:

[0020] The adsorption mechanism of the present application adsorbs the axial end face of the steel coil through the multiple first and second electric permanent magnets arranged around, so as to drive the steel coil to rotate and uncoil, and the two electric permanent magnets adjacent in the radial direction in the present application are installed in a concave-convex matching manner, so that the two electric permanent magnets can be installed close to each other, and the installation gap of the two electric permanent magnets in the radial direction is less than a set threshold after installation. Through the concave-convex matching and the design of reducing the installation gap, the annular area between the two electric permanent magnets in the conventional technology can be eliminated, that is, the magnetic force steep drop area is eliminated, and the situations such as layering error and crease of the steel coil in the uncoiling process are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0021] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of preferred embodiments, and are not meant to limit the present application. Furthermore, the same reference numerals are used throughout the several drawings to represent similar components. In the drawings:

[0022] Figure 1 is a structural schematic diagram of a steel coil in the prior art, (A) represents a front view, and (B) represents an AC-AC cross-sectional schematic diagram;

[0023] Figure 2 is a top view of the adsorption mechanism of the present application;

[0024] Figure 3 is a structural schematic diagram of the adsorption mechanism of the present application, which illustrates the exploded state of the first and second electric permanent magnets;

[0025] Figure 4 is an axonometric view of the main body shell;

[0026] Figure 5 is an exploded view of the first electric permanent magnet in the present application; Figure 3

[0027] Figure 6 is an exploded view of the second electric permanent magnet in the present application; Figure 3

[0028] Figure 7 is a top view of the first and second magnetic poles in the present application;

[0029] Figure 8 is an A-A schematic diagram in the present application; Figure 7

[0030] Explanation of reference signs is as follows:

[0031] 100, main body shell; 110, bottom plate; 111, first annular step; 112, second annular step; 120, peripheral plate; 130, inner peripheral plate; 130a, clamping groove; 140, peripheral rib plate; 100a, shaft hole; ​​​

[0032] 200, First annular electro-permanent magnet assembly; 200a, First electro-permanent magnet; 210, First excitation magnet; 211, First excitation coil; 212, First variable magnet; 220, First permanent magnet; 230, First magnetic pole; 240, Protrusion; 241, First inclined surface;

[0033] 300, Second annular electro-permanent magnet assembly; 300a, Second electro-permanent magnet; 310, Second excitation magnet; 311, Second excitation coil; 312, Second variable magnet; 320, Second permanent magnet; 330, Second magnetic pole; 331, First portion; 332, Second portion; 333, Second inclined surface; 334, Third inclined surface; 335, Extension; 330a, Groove; 330b, Countersunk groove; 330c, Through groove portion; 330d, Blind groove portion;

[0034] SD, Zhou Xiang;

[0035] RD, radial;

[0036] R1, the first annular region;

[0037] R2, the first sub-ring region;

[0038] R3, the second sub-ring region;

[0039] H1, Installation clearance;

[0040] H2, Leave space gaps. Detailed Implementation

[0041] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0043] This embodiment provides an adsorption mechanism and an unwinding device for steel strip uncoiling. First, the adsorption mechanism of this embodiment will be introduced.

[0044] like Figure 2 and Figure 3 As shown, the adsorption mechanism of this embodiment includes a main shell 100, a first annular electro-permanent magnet assembly 200 and a second annular electro-permanent magnet assembly 300, both of which are coaxially arranged inside the main shell 100.

[0045] like Figure 4 As shown, the main body shell 100 includes a base plate 110, an outer peripheral plate 120, and an inner peripheral plate 130. The base plate 110 is circular in shape, and a shaft hole 100a is provided at the axial center of the base plate 110. The base plate 110 is provided with a stepped surface, which includes a first annular step 111 and a second annular step 112. The second annular step 112 is coaxially surrounded around the outer periphery of the shaft hole 100a, and the first annular step 111 is coaxially surrounded around the second annular step 112. The first annular step 111 is used to install the first... A ring-shaped permanent magnet assembly 200 is provided, and a second ring-shaped step 112 is used to install a second ring-shaped permanent magnet assembly 300. An outer plate 120 is coaxially disposed on the first ring-shaped step 111, and an inner plate 130 is coaxially disposed on the second ring-shaped step 112. The inner diameter of the inner plate 130 is equal to the inner diameter of the shaft hole 100a. An installation space for installing the ring-shaped permanent magnet assembly (i.e., the first ring-shaped permanent magnet assembly 200 and the second ring-shaped permanent magnet assembly 300) is formed between the outer plate 120 and the inner plate 130.

[0046] In some preferred embodiments, peripheral stiffeners 140 are coaxially fixed to the outer periphery of the outer plate 120 to improve structural strength.

[0047] like Figure 5As shown, the first annular electric permanent magnetic assembly 200 comprises a plurality of first electric permanent magnets 200a, which are arranged on the first annular step 111 of the bottom plate 110 in the axial direction of the bottom plate 110, and the first electric permanent magnets 200a and the bottom plate 110 can be fixedly connected together by using threaded fasteners. The first electric permanent magnets 200a can generate electromagnetic attraction force under the driving of an external power source, and are used for attracting one side of the steel coil.

[0048] As shown in the drawings, Figure 5 The first electric permanent magnet 200a comprises a first excitation magnet 210, a first permanent magnet 220 and a first magnetic pole 230. The first excitation magnet 210 is fixedly arranged on the first annular step 111 and can switch the on-off of the magnetic circuit under the driving of an external power source. The first excitation magnet 210 specifically comprises a first excitation coil 211 and a first variable magnet 212. The first variable magnet 212 is fixedly arranged on the first annular step 111, the first excitation coil 211 is sleeved on the outer periphery of the first variable magnet 212, and the first excitation coil 211 is electrically connected with the external power source. The first permanent magnet 220 is arranged around the first magnetic pole 230, specifically, the first permanent magnet 220 is connected with the side surface of the first magnetic pole 230. In this embodiment, the first permanent magnet 220 comprises a first permanent magnet, a second permanent magnet and a third permanent magnet, and the three permanent magnets are respectively connected with the three outer side surfaces of the first magnetic pole 230. The first magnetic pole 230 is arranged on the surface of the first variable magnet 212 in a close manner, and the shape of the first magnetic pole 230 is arc-shaped. In the radial direction of the bottom plate 110, one side of the first magnetic pole 230 facing the axis of the bottom plate 110 is provided with a protruding portion 240, which is used for matching with the second electric permanent magnet 300a of the second annular electric permanent magnetic assembly 300. The lower end of the protruding portion 240 is provided with a first inclined surface 241, which has a first included angle with the radial direction of the bottom plate 110. The first inclined surface 241 is used for avoiding the second electric permanent magnet 300a and forming a space gap (denoted by H2) with the second electric permanent magnet 300a. When it is necessary to stop the first electric permanent magnet 200a, the space gap H2 can avoid the magnetic force of the second electric permanent magnet 300a from being transmitted to the first magnetic pole 230 of the first electric permanent magnet 200a.

[0049] As shown in the drawings, Figure 6 The second annular electric permanent magnetic assembly 300 comprises a plurality of second electric permanent magnets 300a, which are arranged on the second annular step 112 of the bottom plate 110 in the axial direction of the bottom plate 110, and the second electric permanent magnets 300a and the bottom plate 110 can be fixedly connected together by using threaded fasteners. The second electric permanent magnets 300a can generate electromagnetic attraction force under the driving of an external power source, and are used for attracting one side of the steel coil. The second electric permanent magnets 300a correspond to the first electric permanent magnets 200a one by one, specifically, in the radial direction of the bottom plate 110, the first electric permanent magnets 200a and the second electric permanent magnets 300a are arranged one by one.

[0050] As Figure 6 shown, the second electric permanent magnet 300a includes a second excitation magnet 310, a second permanent magnet 320, and a second magnetic pole 330. The second excitation magnet 310 is fixedly arranged on the second annular step 112 and can switch the on-off of the magnetic circuit under the driving of an external power supply. The second excitation magnet 310 specifically includes a second excitation coil 311 and a second variable magnet 312. The second variable magnet 312 is fixedly arranged on the second annular step 112, and the second excitation coil 311 is sleeved on the outer periphery of the second variable magnet 312. The second excitation coil 311 is electrically connected with the external power supply. The second permanent magnet 320 is arranged around the second magnetic pole 330, specifically, the second permanent magnet 320 is connected with the side surface of the second magnetic pole 330. In this embodiment, the second permanent magnet 320 includes a fourth permanent magnet and a fifth permanent magnet. The two permanent magnets are respectively connected with two outer side surfaces of the second magnetic pole 330 in the circumferential direction. The second magnetic pole 330 is arranged on the surface of the second variable magnet 312. The overall shape of the second magnetic pole 330 in the top view is V-shaped. The second magnetic pole 330 is provided with a groove 330a. The first magnetic pole 230 and the second magnetic pole 330 correspond to each other in the radial direction of the bottom plate 110. The protruding portion 240 on the first magnetic pole 230 extends along the radial direction and is inserted into the groove 330a, so that the installation gap (H1) between the first magnetic pole 230 and the second magnetic pole 330 in the radial direction is less than a set threshold value, for example, 25 mm, 20 mm, 15 mm, 5 mm, 3 mm, 2 mm, etc.

[0051] It should be noted that the embodiment illustrates that the first magnetic pole is provided with a protruding portion, and the second magnetic pole is provided with a groove. However, in other optional manners, the first magnetic pole can be provided with a groove, and the second magnetic pole can be provided with a protruding portion. As long as the concave-convex matching form can be met, it is an optional manner. The shape and number of the protruding portion and the groove can be selected according to actual needs.

[0052] As Figure 7 shown, the second magnetic pole 330 is divided into two parts. Specifically, the second magnetic pole 330 includes a first part 331 and a second part 332 in the radial direction of the bottom plate 110. The first part 331 is located on the side close to the shaft hole 100a. The second part 332 is provided with a groove 330a matched with the protruding portion 240.

[0053] As Figure 7 shown, the surfaces of the first part 331 and the second part 332 are configured as magnetic pole surfaces. The magnetic pole surfaces are used to adsorb external structures. The magnetic pole surface of the second part 332 is provided with a sunken groove 330b recessed in the thickness direction of the bottom plate 110 (i.e., the axial direction of the bottom plate). The sunken groove 330b is designed to reduce the area of the magnetic pole surface of the second part 332.

[0054] In this embodiment, by reducing the magnetic pole area of the second part 332, the magnetic force layout can be re-optimized, the magnetic force in the middle region of the bottom plate 110 is guided to the axial position, and the magnetic force in the inner region is improved, so as to solve the problem that the steel roll is recessed towards the end surface.

[0055] The specific principle is as follows:

[0056] Firstly, the magnetic pole area refers to the size of the contact surface directly contacting the workpiece to be attracted, and the magnetic force transmission will preferentially pass through the place with the smallest magnetic resistance. The place directly contacting the workpiece to be attracted has the smallest air gap in the whole loop and thus has the smallest magnetic resistance. The place with small magnetic resistance is the channel through which the magnetic field will preferentially pass. Conversely, the place not directly contacting the workpiece has larger magnetic resistance and cannot be counted as the magnetic pole area.

[0057] Secondly, in the first aspect, according to the Maxwell electromagnetic attraction formula (which is explicitly recorded in the prior art), represents the magnetic induction intensity, represents the magnetic pole area, represents the magnetic permeability in vacuum; the second magnetic pole 330 in the above formula is designed with a sink 330b so that the overall magnetic pole area is reduced. Under the condition that the total magnetic flux is unchanged, the magnetic induction intensity on the magnetic pole surface is increased. Therefore, the overall magnetic induction intensity of the first annular region R1 (as shown in Figure 1 ) corresponding to the plurality of second magnetic poles 330 is increased to a certain extent. In the second aspect, the second magnetic pole 330 includes two parts. The first part 331 is not designed with the sink 330b, so that the magnetic pole area of the first part 331 does not change much. However, since the overall magnetic induction intensity of the second magnetic pole 330 is increased, the magnetic force of the first part 331 is greatly increased, thereby significantly improving the overall magnetic force of the first sub-annular region R2 (as shown in Figure 1 ) corresponding to the first part 331, achieving the effect of "concentrating magnetic force", and the overall magnetic force of the second sub-annular region R3 (as shown in Figure 1 ) corresponding to the second part 332 is slightly reduced due to the design of the sink 330b.

[0058] As shown in Figure 7As shown, in the embodiment, the axial direction of the bottom plate 110 is the top-down direction, and the shape of the sink groove 330b viewed from the top is V-shaped, so the sink groove 330b is a V-shaped groove, which includes a through groove part 330c and a blind groove part 330d. The through groove part 330c penetrates the second magnetic pole 330 along the axial direction of the bottom plate 110, while the blind groove part 330d does not penetrate the second magnetic pole 330. The through groove part 330c is located at one end close to the first magnetic pole 230. In the radial direction of the bottom plate 110, the length ratio of the through groove part 330c to the blind groove part 330d is 1:8 to 1:4. In the embodiment, the groove 330a that is configured to be in concave-convex cooperation with the protruding part 240 is preferably configured as a part of the opening position of the sink groove 330b, that is, the through groove part 330c of the sink groove 330b is configured as the groove 330a that is in concave-convex cooperation with the protruding part 240.

[0059] As shown in the figure, Figure 7 In the embodiment, only a small part of the sink groove 330b is a through groove, which avoids excessive reduction of the solid volume of the second magnetic pole 330 and ensures effective conduction of the magnetic force. On the other hand, the through groove part 330c can be used as the groove 330a that cooperates with the protruding part 240 of the first magnetic pole 230, so that the first magnetic pole 230 and the second magnetic pole 330 can be as close to each other as possible in the radial direction, so that the installation gap H1 between the two in the radial direction is less than a certain threshold value, thereby avoiding the generation of a region with a sudden drop in magnetic force.

[0060] As shown in the figure, Figure 8 In the embodiment, a second inclined surface 333 is preferably provided between the inner bottom surface of the blind groove part 330d and one front side surface of the second part 332 facing the protruding part 240, and the second inclined surface 333 has a second included angle with the radial direction. The lower surface of the protruding part 240 is configured as a first inclined surface 241, and the first inclined surface 241 has a first included angle with the radial direction. The first included angle is preferably equal to or approximately equal to the second included angle (the range of approximately equal is within plus or minus ten degrees). The first inclined surface 241 and the second inclined surface 333 form a space gap H2 in the axial direction of the bottom plate 110. The value of the space gap H2 can be 10 mm to 40 mm, such as 20 mm, 25 mm, 30 mm, etc.

[0061] In the embodiment, the first annular electro-permanent magnetic assembly 200 and the second annular electro-permanent magnetic assembly 300 are used to adsorb the axial side surface of the steel coil. As the steel coil is gradually unwound, when the outer diameter of the steel coil gradually decreases to be less than the area corresponding to the first annular electro-permanent magnetic assembly 200, the first annular electro-permanent magnetic assembly 200 needs to be stopped, that is, at this time, the first annular electro-permanent magnetic assembly 200 has no part to be adsorbed, but the second annular electro-permanent magnetic assembly 300 is still adsorbing the steel coil at this time. In order to avoid the magnetic force on the second magnetic pole 330 of the second annular electro-permanent magnetic assembly 300 being conducted to the convex part 240 of the first magnetic pole 230 which has stopped working, the first inclined surface 241 and the second inclined surface 333 are designed to form a space gap to block the channel of the magnetic force conduction, so as to avoid the above problem.

[0062] As shown in FIG. 1, in some embodiments, along the radial direction of the bottom plate 110, the second part 332 is further provided with a third inclined surface 334 towards one end of the first magnetic pole 230, and the third inclined surface 334 has a third included angle with the radial direction. The third inclined surface 334 is also provided to block the magnetic force conduction of the second magnetic pole 330 to the first magnetic pole 230. Figure 8 As shown in FIG. 1, in some embodiments, along the radial direction of the bottom plate 110, the second part 332 is further provided with a third inclined surface 334 towards one end of the first magnetic pole 230, and the third inclined surface 334 has a third included angle with the radial direction. The third inclined surface 334 is also provided to block the magnetic force conduction of the second magnetic pole 330 to the first magnetic pole 230.

[0063] Figure 8 As shown in FIG. 1, in some embodiments, along the radial direction of the bottom plate 110, the second part 332 is further provided with a third inclined surface 334 towards one end of the first magnetic pole 230, and the third inclined surface 334 has a third included angle with the radial direction. The third inclined surface 334 is also provided to block the magnetic force conduction of the second magnetic pole 330 to the first magnetic pole 230.

[0064] The embodiment also discloses an unwinding device. The unwinding device comprises a device main body, a main shaft and an adsorption mechanism. The device main body is arranged on the ground. The main shaft is horizontally arranged and connected with the device main body. The device main body is used to drive the main shaft to rotate. The main shaft passes through the shaft hole 100a of the bottom plate 110 coaxially and is fixedly connected with the bottom plate 110. The first annular electro-permanent magnetic assembly 200 and the second annular electro-permanent magnetic assembly 300 on the bottom plate 110 are used to adsorb the steel coil to be unwound.

[0065] The working principle of the unwinding device in the embodiment is as follows:

[0066] ​The steel coil to be unwound is coaxially sleeved on the main shaft, and an external control system indirectly controls the first and second annular electric permanent magnetic assemblies 200 and 300 to generate electromagnetic attraction force, thereby attracting the steel coil, and then the main shaft rotates, and the steel coil is gradually unwound;

[0067] The outer diameter of the steel coil gradually decreases as the unwinding, and when the external sensor monitors that the outer diameter of the steel coil is less than the inner diameter of the first annular electric permanent magnetic assembly 200, that is, less than the corresponding attraction area of the first annular electric permanent magnetic assembly 200, the external control system indirectly controls the first annular electric permanent magnetic assembly 200 to stop working, and the second annular electric permanent magnetic assembly 300 keeps working until the unwinding is completed.

[0068] The above is only a specific implementation of the present application, and those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, module and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be described here. It should be understood that the protection scope of the present application is not limited to this, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed in the present application, and these modifications or replacements should be covered within the protection scope of the present application.

Claims

1. A suction mechanism for uncoiling a steel strip, characterized in that, The application relates to a main body shell (100) provided with an axial hole (100a); a first annular electric permanent magnetic assembly (200) comprising a plurality of first electric permanent magnets (200a) arranged axially on the main body shell (100) around the axial hole (100a); and a second annular electric permanent magnetic assembly (300) comprising a plurality of second electric permanent magnets (300a) arranged axially on the inner side of the first annular electric permanent magnetic assembly (200) around the axial hole (100a); the first electric permanent magnets (200a) and the second electric permanent magnets (300a) are arranged in one-to-one correspondence in the radial direction of the axial hole (100a); the first electric permanent magnets (200a) are provided with protruding portions (240), and the second electric permanent magnets (300a) are provided with grooves (330a); in the radial direction of the axial hole (100a), the protruding portions (240) are inserted into the grooves (330a), so that the installation gap (H1) between the first electric permanent magnets (200a) and the second electric permanent magnets (300a) in the radial direction is less than a set threshold value. The main body shell (100) comprises a bottom plate (110), a peripheral plate (120) and an inner peripheral plate (130); the bottom plate (110) is provided with the axial hole (100a); the bottom plate (110) is provided with a stepped surface; a first annular step (111) of the stepped surface is used for mounting the first annular electric permanent magnetic assembly (200); a second annular step (112) of the stepped surface is used for mounting the second annular electric permanent magnetic assembly (300); the peripheral plate (120) is coaxially arranged at the edge position of the bottom plate (110); and the inner peripheral plate (130) is coaxially arranged at the hole opening end surface of the axial hole (100a). The first electric permanent magnet (200a) comprises a first excitation magnet (210), a first permanent magnet (220) and a first magnetic pole (230); the first excitation magnet (210) is arranged on the main body shell (100); the first permanent magnet (220) is arranged outside the first magnetic pole (230); the first magnetic pole (230) is arranged on one side of the first excitation magnet (210); the first magnetic pole (230) is provided with the protruding portion (240); and the protruding portion (240) is arranged in the groove (330a) so that the installation gap (H1) between the first electric permanent magnet (200a) and the second electric permanent magnet (300a) in the radial direction is less than a set threshold value. The bottom of the protruding portion (240) is provided with a first inclined surface (241). The second electric permanent magnet (300a) comprises a second excitation magnet (310), a second permanent magnet (320) and a second magnetic pole (330); the second excitation magnet (310) is arranged on the main body shell (100); the second permanent magnet (320) is arranged outside the second magnetic pole (330); the second magnetic pole (330) is arranged on one side of the second excitation magnet (310); and the second magnetic pole (330) is provided with the groove (330a). ​ 2. The suction mechanism according to claim 1, wherein ​ 3. The suction mechanism according to claim 1, wherein ​ 4. The suction mechanism according to claim 3, wherein ​ 5. The adsorption mechanism according to any one of claims 1 to 4, wherein ​ 6. The suction mechanism according to claim 5, wherein The second magnetic pole (330) comprises a first part (331) and a second part (332) in the radial direction, the first part (331) is located on the side close to the shaft hole (100a), and a magnetic pole surface of the second part (332) is provided with a sink groove (330b) for reducing the magnetic pole area of the second part (332), and the recess (330a) is arranged on the second part (332).

7. The suction mechanism according to claim 6, wherein The sink groove (330b) is configured as a V-shaped groove, and the sink groove (330b) is divided into a through groove part (330c) and a blind groove part (330d) in the radial direction, the length ratio of the through groove part (330c) to the blind groove part (330d) is 1:8 to 1:4, and the through groove part (330c) is configured as the recess (330a).

8. The suction mechanism according to claim 6 or 7, characterized in that A second inclined surface (333) is arranged between the inner bottom surface of the sink groove (330b) and the front side surface of the second part (332), the front side surface of the second part (332) is perpendicular to the radial direction, and a space gap (H2) is arranged between the second inclined surface (333) and the lower surface of the protruding part (240).

9. The suction mechanism according to claim 6, wherein The first part (331) is provided with an extension part (335) extending in the radial direction, the shaft hole (100a) of the main body shell (100) is coaxially provided with an inner surrounding plate (130), the inner surrounding plate (130) is provided with a clamping groove (130a), and the extension part (335) is arranged in the clamping groove (130a).

10. An uncoiling device, characterized by The device comprises a device main body, a main shaft and the adsorption mechanism according to any one of claims 1 to 9, the device main body is connected with the main shaft and used for driving the main shaft to rotate, the shaft hole (100a) of the adsorption mechanism is coaxially arranged on the main shaft, and the first annular electric permanent magnetic assembly (200) and the second annular electric permanent magnetic assembly (300) of the adsorption mechanism are used for adsorbing a steel coil to be unwound.

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