Cylinder score positioning device and dispersion equipment

Abstract

The utility model relates to the technical field of coating processing, and particularly discloses a cylinder score positioning device and dispersing equipment, the cylinder score positioning device comprises a connecting assembly, a laser emitting mechanism and a polarization piece, the laser emitting mechanism is arranged in an inner cavity of the connecting assembly, and the axis of the laser emitting mechanism extends in the axial direction of a rotating shaft. The polarization part is arranged at the output end of the laser emitting mechanism, and the aperture emitted by the laser emitting mechanism can deviate at the polarization part so that the circle center of the aperture emitted by the laser emitting mechanism can be located on the axis extension line of the rotating shaft, namely, the aperture emitted by the laser emitting mechanism and the rotating shaft are coaxially arranged. The circumferential edge of the pull cylinder and the edge of the aperture coincide or keep the same distance, so that the pull cylinder and the rotating shaft can be coaxially installed, visual installation and calibration between the pull cylinder and the rotating shaft can be achieved by arranging the pull cylinder positioning device, installation and use are convenient, the coaxial installation precision is high, and manual estimation and judgment errors are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coating processing, in particular to a cylinder positioning device and a dispersing device. Background Art

[0002] Dispersers, also known as emulsifiers and homogenizers, play an important role in the mixing system and mixing of modern industrial equipment, especially in solid-liquid mixing, liquid-liquid mixing, oil-water emulsification, dispersion homogenization, and shear grinding. In the coatings industry, dispersers are often used for powder dispersion and solid-liquid mixing. Floor-standing dispersers are commonly used in the dispersion production of cylinder products. Floor-standing dispersers include dispersion blades, dispersion shafts, transmission mechanisms, transmission mechanism protection parts, explosion-proof motors, frequency converters, and engineering cylinders.

[0003] For coating products, the best dispersion state of coating production is when it is wetted and enters the vortex state. After the pigments and fillers are wetted, they enter the dispersion stage, and the dispersion stage should maintain a laminar state. During dispersion, if the dispersion axis deviates from the center of the pull cylinder, it will affect the dispersion effect on the coating and the performance of the coating product, including but not limited to the following effects: more bubbles are introduced, which affects the dispersion efficiency and the specific gravity of the material, thereby affecting the packaging effect of the material per unit volume.

[0004] In the related art, the dispersion efficiency can be effectively improved by adjusting the position of the pull cylinder and the dispersion axis of the floor-standing disperser in the dispersion system. However, the current method of adjusting the position of the dispersion axis is manual adjustment. First, the dispersion axis is lifted to place the pull cylinder under the dispersion axis. After placement, the dispersion axis is lowered and the dispersion axis is adjusted to see if it is in the center of the inner cavity of the pull cylinder by visual sensory estimation. After subjectively judging that the position of the main shaft is accurately adjusted, the pull cylinder is fixed and locked to prevent safety hazards after startup. After starting the disperser, it is judged again whether the dispersion axis is in the center of the pull cylinder based on the dispersion state of the liquid. If not, it is necessary to stop the machine, release the fixed locking device, and adjust the position of the main shaft again. This repeated adjustment is cumbersome to operate. Utility Model Content

[0005] The utility model aims to provide a pull cylinder positioning device and a dispersion device to solve the problem in the related art that the positions of the dispersion shaft and the inner cavity of the pull cylinder need to be estimated and judged manually, and the repeated adjustment operation is cumbersome.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] In a first aspect, the utility model provides a pull cylinder positioning device, wherein the pull cylinder is used for a rotating shaft to extend into and rotate, and the pull cylinder positioning device comprises:

[0008] A connection component, the connection component is used to connect to an external device;

[0009] A laser emitting mechanism, the laser emitting mechanism is arranged in the inner cavity of the connecting component, the axis of the laser emitting mechanism is extended along the axial direction of the rotating shaft, and the laser emitting mechanism is used to emit an aperture to the outside of the connecting component;

[0010] A polarizer, wherein the polarizer is disposed at the output end of the laser emitting mechanism, and the polarizer is used to shift the aperture to be coaxial with the rotating shaft.

[0011] In one embodiment, the connection assembly includes:

[0012] A cylinder, the cylinder extending along the axial direction of the laser emitting mechanism;

[0013] Two connecting plates, both of which are rotatably connected to the barrel, and are used for detachable connection with the external device.

[0014] In one of the embodiments, the surface of the connecting piece is used to connect to the side wall of the external device, and the connecting piece is configured to be able to be magnetically attracted.

[0015] In one of the embodiments, the connecting piece is made of a highly flexible strong rubber magnet.

[0016] In one embodiment, the thickness of the connecting sheet gradually decreases from a side connected to the cylinder to a side away from the cylinder.

[0017] In one embodiment, the laser emitting mechanism comprises:

[0018] A laser for emitting a laser beam;

[0019] A flat-top light shaper, the flat-top light shaper is arranged at the output end of the laser;

[0020] A focusing beam shaper is arranged at the output end of the flat-top light shaper, and is used to shape the laser beam into a circular or annular aperture.

[0021] In one embodiment, the laser emitting mechanism further includes a first adjusting member, which is disposed on the connecting assembly and is transmission-connected to the focusing beam shaper, and is used to adjust the radial size of the aperture.

[0022] In one of the embodiments, the laser emitting mechanism further includes a second adjusting member, which is disposed on the connecting assembly and is transmission-connected to the polarizing member, and the second adjusting member is used to adjust the offset distance of the aperture.

[0023] In a second aspect, the utility model provides a dispersing device, comprising:

[0024] The disperser comprises a body and a dispersion shaft which are connected to each other in a transmission manner, wherein the external device is configured as the body, and the rotating shaft is configured as the dispersion shaft;

[0025] Pull cylinder;

[0026] The connecting assembly is arranged on the machine body, the polarizing element can shift the aperture to be coaxial with the dispersion axis, and the pull cylinder can be placed in the aperture.

[0027] In one embodiment, the aperture has the same profile and size as the opening of the pull cylinder.

[0028] The beneficial effects of the utility model are:

[0029] The utility model provides a cylinder positioning device and a dispersion device. The cylinder positioning device can be used to position the installation position of the cylinder. The cylinder is used for a dispersion shaft and other rotating shafts to extend into and rotate. The connecting component can be installed on an external device such as a floor bracket for fixing. The laser emitting mechanism can emit an aperture outward along the axial direction of the rotating shaft. If there is a certain distance between the laser emitting mechanism and the rotating shaft, there will also be a certain distance between the aperture emitted by the laser emitting mechanism and the extended axis line of the rotating shaft. The aperture emitted by the laser emitting mechanism can be offset at the polarizing element so that the center of the aperture emitted by the laser emitting mechanism is located on the extended axis line of the rotating shaft, that is, the aperture emitted by the laser emitting mechanism is coaxially arranged with the rotating shaft. Therefore, it is only necessary to place the cylinder in the aperture, and the circumferential edge of the cylinder and the edge of the aperture are overlapped or maintained at the same distance to complete the coaxial installation of the cylinder and the rotating shaft. By setting the cylinder positioning device, visual installation calibration between the cylinder and the rotating shaft can be achieved. The installation is convenient and the coaxial installation accuracy is high, which reduces the error of human estimation and judgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural schematic diagram of the pull cylinder positioning device in the embodiment of the utility model;

[0031] Figure 2 It is an exploded view of the pull cylinder positioning device in the embodiment of the utility model;

[0032] Figure 3 It is a bottom view of the pull cylinder positioning device in the embodiment of the utility model;

[0033] Figure 4 It is a top view of the cylinder in the embodiment of the utility model;

[0034] Figure 5 This is a schematic diagram of the structure of the laser emitting mechanism in the embodiment of the utility model;

[0035] Figure 6 It is a schematic diagram of the structure of the disperser in the embodiment of the utility model.

[0036] In the figure:

[0037] 1. Connecting assembly; 11. Cylinder; 12. Connecting piece;

[0038] 2. Laser emitting mechanism; 21. Laser; 22. Flat top light shaper; 23. Focusing beam shaper; 24. Aperture; 25. First adjusting member; 26. Second adjusting member; 27. Switch member;

[0039] 3. Polarizing parts;

[0040] 4. Machine body; 5. Dispersion shaft; 6. Pull cylinder. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0042] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0045] like Figures 1 to 3 As shown, the embodiment of the first aspect of the utility model provides a cylinder positioning device, the cylinder 6 is used for the rotating shaft to extend into and rotate, and the cylinder positioning device includes a connecting component 1, a laser emitting mechanism 2 and a polarizer 3. The connecting component 1 is used to connect with an external device, and the connecting component 1 can be fixed in position by supporting an external device such as a bracket. The laser emitting mechanism 2 is arranged in the inner cavity of the connecting component 1, and the axis of the laser emitting mechanism 2 is extended along the axial direction of the rotating shaft. The laser emitting mechanism 2 is used to emit an aperture 24 to the outside of the connecting component 1. The connecting component 1 can protect the laser emitting mechanism 2, and the aperture 24 emitted by the laser emitting mechanism 2 can form a certain irradiation area. The polarizer 3 is arranged at the output end of the laser emitting mechanism 2, and the polarizer 3 can offset the aperture 24. The polarizer 3 can be, but is not limited to, a polarizer or a polarizer.

[0046] With such arrangement, the cylinder positioning device can be used to locate the installation position of the cylinder 6, the cylinder 6 is used for the dispersion shaft 5 and other rotating shafts to extend into and rotate, the connecting assembly 1 can be installed on external equipment such as a floor stand for fixing, the laser emitting mechanism 2 can emit the aperture 24 outward along the axial direction of the rotating shaft, if there is a certain distance between the laser emitting mechanism 2 and the rotating shaft, there will also be a certain distance between the aperture 24 emitted by the laser emitting mechanism 2 and the extended line of the axis of the rotating shaft, the aperture 24 emitted by the laser emitting mechanism 2 can be offset at the polarizer 3, so that the circular aperture 24 emitted by the laser emitting mechanism 2 The center is located on the extended line of the axis of the rotating shaft, that is, the aperture 24 emitted by the laser emitting mechanism 2 is coaxially arranged with the rotating shaft. Therefore, it is only necessary to place the pull cylinder 6 in the aperture 24, and the circumferential edge of the pull cylinder 6 and the edge of the aperture 24 are overlapped or maintained at the same distance to complete the coaxial installation of the pull cylinder 6 and the rotating shaft. By setting the pull cylinder positioning device, the visual installation calibration between the pull cylinder 6 and the rotating shaft can be achieved. The installation is convenient and the coaxial installation accuracy is high, which reduces the error of human estimation and judgment, and solves the problem that the positions of the inner cavity of the dispersion shaft 5 and the pull cylinder 6 in the related technology need to be manually estimated and judged, and the repeated adjustment operation is cumbersome.

[0047] It should be noted here that the cylinder positioning device can be installed on an external device such as a bracket close to the rotating shaft. If the volume of the laser emitting mechanism 2 is small enough and the distance between the laser emitting mechanism 2 and the axis of the rotating shaft is close enough, the aperture 24 emitted by the laser emitting mechanism 2 can also meet the situation where the installation accuracy of the cylinder 6 is not high. By setting the polarizer 3, the design requirements for the radial dimensions of the laser emitting mechanism 2 and the rotating shaft can be reduced to meet the various installation needs of the cylinder 6.

[0048] like Figures 1 to 3 As shown, in some embodiments, the connecting assembly 1 includes a cylinder 11 and two connecting plates 12. The cylinder 11 is extended along the axial direction of the laser emitting mechanism 2. The laser emitting mechanism 2 is installed inside the cylinder 11. The cylinder 11 can protect the laser emitting mechanism 2. The laser emitting mechanism 2 is extended along the axial direction of the cylinder 11, so that the laser emitting mechanism 2 and the cylinder 11 can maintain coaxiality.

[0049] The two connecting pieces 12 are respectively connected to the cylinder 11 for rotation, and the two connecting pieces 12 can be hinged through the cylinder 11. The connecting pieces 12 are used for detachable connection with external equipment such as brackets, and the connection can be but not limited to magnetic attraction, clamping, bonding or bolt connection, which is convenient for connecting the connecting assembly 1 with external equipment. The two connecting pieces 12 can be erected and supported on both sides of the cylinder 11, and the two connecting pieces 12 can rotate with the cylinder 11 as the axis. The two connecting pieces 12 can be connected to external equipment of different sizes, reducing the influence of different installation conditions on the extension direction of the axis of the cylinder 11, improving the parallelism between the cylinder 11 and the rotating shaft, and improving the alignment effect between the rotating shaft and the pull cylinder 6.

[0050] In some embodiments, the surface of the connecting piece 12 can be connected to the side wall of the external device, and the connecting piece 12 is configured to be magnetically attracted, that is, the connecting piece 12 can be configured with a magnetic material, and the surface of the connecting piece 12 can be directly magnetically attracted to the side wall of the external device. The connection area is large, positioning is convenient, and the connection is stable.

[0051] In this embodiment, the material of the connecting piece 12 can be ferrite magnetic material. For example, the connecting piece 12 can be, but is not limited to, a highly flexible strong rubber magnet. The highly flexible strong rubber magnet is a soft, elastic and twistable magnet made by bonding ferrite powder and synthetic rubber through extrusion molding, calendering molding, injection molding and other processes, so that the surface of the connecting piece 12 can fit more firmly with the side wall of the external device, thereby improving the accuracy of the fixed position of the cylinder 11. Among them, the magnetic energy product of the highly flexible strong rubber magnet is between 0.60MGOe and 1.50MGOe, and its magnetic energy product can also be adjusted as needed. The connecting piece 12 and the cylinder 11 can be connected by fixing nails or rivets, and the material of the fixing nails or rivets can be hard polyvinyl chloride material to keep the connecting piece 12 and the cylinder 11 rotating freely.

[0052] like Figure 3 As shown, in some embodiments, the thickness of the connecting piece 12 gradually decreases from the side connected to the cylinder 11 to the side away from the cylinder 11, that is, the connecting piece 12 is a wedge-shaped structure, and the size of the connecting piece 12 at the connection position with the cylinder 11 is relatively thick and has high strength, which reduces the movement of the cylinder 11 and thus maintains the fixed stability of the laser emitting mechanism 2, reduces shaking, and improves the alignment accuracy of the pull cylinder 6 and the rotating shaft.

[0053] like Figures 1 to 5 As shown, in some embodiments, the laser emitting mechanism 2 includes a laser 21, a flat top light shaper 22 and a focused beam shaper 23. The laser 21 is used to emit a laser beam, and the laser beam can be a plurality of parallel light rays. The flat top light shaper 22 is arranged at the output end of the laser 21, and can convert the laser beam into a flat top light spot with uniform intensity distribution. The focused beam shaper 23 is arranged at the output end of the flat top light shaper 22, and the focused beam shaper 23 is used to shape the laser beam into a circular or annular aperture 24.

[0054] In this embodiment, the laser 21 may include a laser light source body and a convex lens, the convex lens is arranged at the output end of the laser light source body, the laser light source body may be placed at the focal position of the convex lens, and the point light source formed by the laser light source body can be diverged into multiple parallel light beams after being refracted by the convex lens. For example, the laser 21 may be configured as a semiconductor pump laser, which includes a diode, a light-emitting crystal, and a high-temperature protection mechanism. The laser 21 may be connected to a power supply. If there is a special light emission requirement, an optical lens combination may be provided at the output end of the laser 21. The flat-top light shaper 22 may include two barrel lenses with different curvatures. The laser beam of the laser 21 is converged by the barrel lens with a smaller curvature radius and then dispersed into parallel light beams by the barrel lens with a larger curvature radius.

[0055] The focusing beam shaper 23 may include an aspheric mirror, two axicon mirrors, a focusing lens and a micromirror array. The light output by the flat top light shaper 22 may be incident on the axicon mirror of a larger size and reflected on the curved surface of the aspheric mirror. The aspheric mirror may be arranged around the two axicon mirrors. The aspheric mirror reflects the light beam to the axicon mirror of a smaller size. The axicon mirror of a smaller size reflects the light beam to the micromirror array. The micromirror array may focus or shape the light beam and output it to the polarizer 3. After being polarized by the polarizer 3, it is irradiated to the ground at the lower end of the rotating shaft. The circular or annular aperture 24 formed may be used for the placement and alignment of the pull cylinder 6. It should be noted here that the laser 21, the flat top light shaper 22 and the focusing beam shaper 23 are optical shaping structures in the conventional technology. The more specific shaping or imaging principles and detailed structures thereof are similar to those of the conventional technology and will not be described in detail here.

[0056] like Figure 2 and Figure 5As shown, in some embodiments, the laser emitting mechanism 2 further includes a first adjusting member 25, which is disposed on the connecting assembly 1 and is transmission-connected to the focusing beam shaper 23. The first adjusting member 25 is used to adjust the radial size of the aperture 24, that is, the first adjusting member 25 may be, but is not limited to, a driving member such as a cylinder, a hydraulic cylinder, a motor, or a manual knob, and may drive the focusing beam shaper 23 to move with the connecting assembly 1 as a support. For example, the first adjusting member 25 may drive the aspheric mirror, the axicon, or the focusing lens to move along the axial direction of the axicon to adjust the relative positions of the three, adjust the laser beam reflection angle, and further adjust the imaging size of the aperture 24, that is, the radial size of the aperture 24.

[0057] In this embodiment, the first adjusting member 25 can preset multiple position adjustment marks on the connecting component 1, and each position adjustment mark corresponds to a radial dimension of the aperture 24, so as to provide the user with an adjustment reference according to the opening size of the pull cylinder 6. The first adjusting member 25 can be adjusted to different position marks respectively to adjust the aperture 24 in multiple gears, for example, three to five gears are appropriate.

[0058] In some embodiments, the laser emitting mechanism 2 also includes a second adjusting member 26, which is arranged on the connecting component 1, and the second adjusting member 26 is transmission-connected to the polarizing member 3, and the second adjusting member 26 is used to adjust the offset distance of the aperture 24. In this way, the second adjusting member 26 can also be but not limited to a driving member such as a cylinder, a hydraulic cylinder, a motor or a manual knob, which can drive the polarizing member 3 to move with the support of the connecting component 1 to adjust the angle of the polarizing member 3. The polarizing member 3 can fine-tune the optical path according to the inclination angle to adjust the offset distance of the aperture 24, thereby adjusting according to different installation positions of the connecting component 1 or different radial dimensions of the rotating shaft, so that the cylinder positioning device is suitable for different installation conditions.

[0059] In this embodiment, the polarizer 3 can be rotatably connected to the connecting component 1, and the second adjusting member 26 can also preset multiple movable adjustment marks on the connecting component 1, each movable adjustment mark corresponds to an offset distance, so as to provide the user with an adjustment reference according to different installation positions of the connecting component 1, and the second adjusting member 26 can be adjusted to different movable adjustment marks respectively to adjust the offset distance of the aperture 24 in multiple gears, for example, three to five gears are appropriate. In addition, the laser emitting mechanism 2 can also include a switch member 27, and a switch circuit is provided between the laser 21 and the power supply, and the switch member 27 is provided on the switch circuit to adjust the opening and closing of the laser 21. Optionally, the switch member 27 can be installed outside the barrel 11 to facilitate user operation.

[0060] like Figures 1 to 2 as well as Figure 5 to Figure 6As shown, the embodiment of the second aspect of the utility model provides a dispersion device, including a dispersion machine, a cylinder and a cylinder positioning device in any of the above schemes, the dispersion machine includes a body 4 and a dispersion shaft 5 connected to each other in a transmission manner, the rotating shaft is configured as the dispersion shaft 5, the external device can be configured as the body 4, and the connection component 1 is arranged on the body 4, which can not only reduce the alignment effect of the rotation of the dispersion shaft 5 on the aperture 24 of the laser emitting mechanism 2, but also enable the body 4 to protect the cylinder positioning device. For example, the connection component 1 can be installed on the outer side of one end of the body 4 close to the main shaft, and the axis of the laser emitting mechanism 2 is arranged to extend along the axial direction of the dispersion shaft 5. The polarizer 3 can offset the aperture 24 to be coaxial with the dispersion shaft 5, and the cylinder 6 can be placed in the aperture 24.

[0061] With such a configuration, when in use, the connecting assembly 1 of the cylinder positioning device can be installed on the machine body 4, the laser emitting mechanism 2 can be made perpendicular to the ground, and the aperture 24 can be offset to be coaxial with the dispersion axis 5, then the disperser can be started, the disperser body 4 drives the dispersion axis 5 to rise, and the cylinder 6 is placed below the dispersion axis 5. The cylinder 6 and the dispersion axis 5 can be first visually aligned coaxially, the machine body 4 drives the dispersion axis 5 to descend to the original position, and the dispersion axis 5 extends into the cylinder 6. At this time, the circumferential edge of the cylinder 6 can be adjusted to coincide with the edge of the aperture 24 or to maintain the same distance so that the cylinder 6 and the dispersion axis 5 can be coaxially installed, and finally the cylinder 6 can be fixed. By setting the cylinder positioning device, visual installation calibration between the cylinder 6 and the dispersion axis 5 can be achieved, the installation and use are convenient, the adjustment efficiency is improved, the coaxial installation accuracy is high, and the error of human estimation and judgment is reduced, so that the dispersion efficiency of the material is maximized, the dispersion efficiency is guaranteed, and the material splashing is reduced, the introduction of bubbles is reduced, materials are saved, and costs are reduced.

[0062] In some embodiments, the aperture 24 and the pull cylinder 6 have the same opening profile and size, so that when the pull cylinder 6 and the aperture 24 are aligned, the circumferential edges of the two need to be aligned and overlapped, which has higher alignment accuracy and is easy to operate.

[0063] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A pull cylinder positioning device, the pull cylinder (6) is used for the rotating shaft to extend into and rotate, characterized in that: The cylinder positioning device comprises: A connection component (1), the connection component (1) being used for connecting to an external device; A laser emitting mechanism (2), the laser emitting mechanism (2) being arranged in the inner cavity of the connecting component (1), the axis of the laser emitting mechanism (2) extending along the axial direction of the rotating shaft, and the laser emitting mechanism (2) being used to emit an aperture (24) to the outside of the connecting component (1); A polarizer (3), the polarizer (3) being arranged at the output end of the laser emitting mechanism (2), and the polarizer (3) being used to shift the aperture (24) to be coaxial with the rotating shaft.

2. The cylinder positioning device according to claim 1, characterized in that: The connection component (1) comprises: A cylinder (11), wherein the cylinder (11) is arranged to extend along the axial direction of the laser emitting mechanism (2); Two connecting pieces (12), the two connecting pieces (12) are respectively rotatably connected to the barrel (11), and the connecting pieces (12) are used for detachably connecting to the external device.

3. The cylinder positioning device according to claim 2, characterized in that: The surface of the connecting piece (12) is used to be connected to the side wall of the external device, and the connecting piece (12) is configured to be able to be magnetically attracted.

4. The cylinder positioning device according to claim 3, characterized in that: The material of the connecting piece (12) is a highly flexible and strong rubber magnet.

5. The cylinder positioning device according to claim 2, characterized in that: The thickness of the connecting piece (12) gradually decreases from the side connected to the cylinder (11) to the side away from the cylinder (11).

6. The cylinder positioning device according to claim 1, characterized in that: The laser emitting mechanism (2) comprises: A laser (21) for emitting a laser beam; A flat-top light shaper (22), the flat-top light shaper (22) being arranged at the output end of the laser (21); A focusing beam shaper (23) is arranged at the output end of the flat-top light shaper (22), and the focusing beam shaper (23) is used to shape the laser beam into a circular or annular aperture (24).

7. The cylinder positioning device according to claim 6, characterized in that: The laser emitting mechanism (2) further comprises a first adjusting member (25), the first adjusting member (25) being arranged on the connecting assembly (1), and the first adjusting member (25) being transmission-connected to the focusing beam shaper (23), and the first adjusting member (25) being used to adjust the radial dimension of the aperture (24).

8. The cylinder positioning device according to claim 6, characterized in that: The laser emitting mechanism (2) further comprises a second adjusting member (26), the second adjusting member (26) being arranged on the connecting assembly (1), and the second adjusting member (26) being transmission-connected to the polarizing member (3), and the second adjusting member (26) being used to adjust the offset distance of the aperture (24).

9. A dispersing device, characterized in that: include: A disperser, comprising a body (4) and a dispersion shaft (5) which are connected to each other in a transmission manner, wherein the external device is configured as the body (4), and the rotating shaft is configured as the dispersion shaft (5); Pull cylinder (6); The pull cylinder positioning device according to any one of claims 1 to 8, wherein the connecting assembly (1) is arranged on the machine body (4), the polarizing element (3) can shift the aperture (24) to be coaxial with the dispersion axis (5), and the pull cylinder (6) can be placed in the aperture (24).

10. The dispersing device according to claim 9, characterized in that The aperture (24) has the same opening profile and size as the pull cylinder (6).

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