Rotary drum slime test device

Abstract

The main purpose of the present invention is to provide a rotary drum slime-forming test device, comprising: a frame; a rotary drum, the rotary drum includes a drum body, a cover body covering the drum body, and a rotating shaft arranged on the side wall of the drum body, the rotating shaft is rotatably arranged on the frame, and the axis direction of the rotating shaft is perpendicular to the axis direction of the rotary drum; a driving structure, arranged on the frame, the driving structure can drive the rotating shaft to rotate; a first magnetic device, arranged on the drum body and having a first distance from the rotating shaft; a second magnetic device, arranged on the frame and having a second distance from the rotating shaft, when the rotary drum rotates from the vertical state to the horizontal state, the first magnetic device and the second magnetic device approach each other, and the first magnetic device and the second magnetic device are magnetically coupled with each other. Applying the technical solution of the present invention can effectively solve the problem that structures such as the rotating shaft, bearing, and coupling of the rotary drum slime-forming test device in the related art are easily damaged.

Description

Technical Field

[0001] The present invention relates to the field of coal property testing devices, and more particularly to a rotary drum slime test device. Background Art

[0002] The rotary drum slime test of coal is an important test during the analysis of coal preparation samples. According to the provisions of GB / T 26918-2011, the test raw materials consist of raw coal to be washed and water. The test raw materials need to be placed in a rotary drum with a volume of 200L, a height of 1m, and a rotation speed of 20r / min. After the raw materials are put into the drum, the test is carried out according to the actual test requirements. However, since there is no very clear test equipment at present, each major laboratory designs the equipment according to the experimental requirements specified in the national standard.

[0003] The rotary drum is the main test equipment for the rotary drum slime test. It is mainly used to hold the raw coal to be washed and water. Since the mass of the raw coal to be washed and water is relatively large, when the rotary drum rotates, the raw coal to be washed and water will flow inside the drum. When the drum body rotates to a certain angle, the raw coal to be washed and water will quickly pour to one side of the drum body, and the weight of the other side of the drum body is too light, resulting in uneven stress on the bearings of the rotating shaft, and frequently damaging the bearings, the rotating shaft, and the coupling. Summary of the Invention

[0004] The main purpose of the present invention is to provide a rotary drum slime test device to solve the problem that structures such as the rotating shaft, bearings, and couplings of the rotary drum slime test device in the related art are easily damaged.

[0005] To achieve the above object, the present invention provides a rotary drum slime test device, including: a frame; a rotary drum, the rotary drum includes a drum body, a cover body covering the drum body, and a rotating shaft provided on the side wall of the drum body, the rotating shaft is rotatably provided on the frame, and the axis direction of the rotating shaft is perpendicular to the axis direction of the rotary drum; a driving structure provided on the frame, the driving structure can drive the rotating shaft to rotate; a first magnetic device provided on the drum body and having a first distance from the rotating shaft; a second magnetic device provided on the frame and having a second distance from the rotating shaft. When the rotary drum rotates from the vertical state to the horizontal state, the first magnetic device and the second magnetic device approach each other, and the first magnetic device and the second magnetic device are magnetically coupled with each other.

[0006] Further, the frame includes a support frame and a cross beam provided on the support frame. The cross beam is located outside the drum body, and the rotating shaft and the second magnetic device are connected to the cross beam.

[0007] Further, the first magnetic device includes a first magnet and a second magnet, which are spaced apart along the axial direction of the cylinder; the second magnetic device includes a third magnet and a fourth magnet, which are spaced apart along the length direction of the cross beam; wherein, the first magnet and the third magnet are magnetically coupled, and the second magnet and the fourth magnet are magnetically coupled.

[0008] Further, the ratio between the first distance and the second distance is between 0.6 and 1.

[0009] Further, the first magnet and the second magnet are both permanent magnets, and the third magnet and the fourth magnet are both electromagnets.

[0010] Further, the first magnet, the second magnet, the third magnet, and the fourth magnet are all permanent magnets.

[0011] Further, the third magnet and the fourth magnet both include a solenoid disposed on the cross beam, a core disposed inside the solenoid, and a coil wound outside the solenoid.

[0012] Further, the rotary drum slime test device further includes a power supply electrically connected to the coil and a controller for controlling the on / off of the power supply.

[0013] Further, the cylinder and the cover are hermetically connected through a flange structure.

[0014] Further, the rotary drum slime test device further includes a water inlet pipe disposed on the cover; and / or, a handle is disposed on the cover.

[0015] Applying the technical solution of the present invention, the rotary drum slime test device includes a frame and a rotary drum rotatably disposed on the frame, and the rotary drum is used to hold the raw coal to be washed and water. The driving structure is used to provide power for the rotation of the rotary drum. There is always a magnetic attraction force between the first magnetic device and the second magnetic device, forming a magnetic coupling. During the test, when the driving structure is started and the rotary drum rotates from the vertical state to the horizontal state, due to the magnetic attraction force generated between the first magnetic device and the second magnetic device, the magnetic attraction force will become an auxiliary force when the rotary drum rotates from the vertical state to the horizontal state, enabling the driving device to more easily drive the rotary drum from the vertical state to the horizontal state. When the rotary drum rotates to the horizontal state, the distance between the first magnetic device and the second magnetic device is the closest, and the magnetic attraction force is the largest. When the rotary drum rotates from the horizontal state to the vertical state, the magnetic attraction force between the first magnetic device and the second magnetic device will form a damping force on the rotation of the rotary drum, thereby reducing the rotation speed of the rotary drum, reducing the pouring speed of the coal slurry, and thus ensuring that the two ends of the rotating shaft can be evenly stressed to the greatest extent, thereby ensuring the service life of the rotating shaft. Description of the Drawings

[0016] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 shows a front view of an embodiment of a rotary drum slime-forming test device according to the present invention;

[0018] Figure 2 shows Figure 1 a side view of the rotary drum slime-forming test device;

[0019] Figure 3 shows Figure 1 a schematic structural view of the third magnet or the fourth magnet of the rotary drum slime-forming test device;

[0020] Figure 4 shows Figure 1 a schematic internal structure view of the rotary drum of the rotary drum slime-forming test device.

[0021] Among them, the above-mentioned drawings include the following reference numerals:

[0022] 10, frame; 11, support frame; 12, cross beam; 20, rotary drum; 21, cylinder body; 22, cover body; 23, rotating shaft; 24, inner cylinder; 30, drive structure; 40, first magnetic device; 41, first magnet; 42, second magnet; 50, second magnetic device; 51, third magnet; 511, solenoid; 512, core; 513, coil; 52, fourth magnet; 60, water inlet pipe; 70, handle. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0024] It should be noted that the terms used here are only for describing the specific implementation manners and are not intended to limit the exemplary implementation manners according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or their combinations.

[0025] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.

[0026] After extensive analysis and research on the flow state of the mixture of raw coal and water (hereinafter referred to as coal slurry) inside the rotating drum 20 during rotation, the inventor found that when the coal slurry is loaded into the rotating drum 20, the rotating drum 20 remains in a vertical state under the gravity of the coal slurry. When the driving structure 30 is started, the rotating drum 20 rotates from the vertical state to the horizontal state. During this process, the coal slurry flows along the side wall of the cylinder body 21 of the rotating drum 20 until the rotating drum 20 rotates to the horizontal state, and the center of gravity of the coal slurry is close to the rotation center of the rotating drum. During this process, the moving distance of the center of gravity of the coal slurry is small, and the moving speed of the center of gravity is slow. When the rotating drum rotates to the horizontal state, the distribution of the coal slurry in the rotating drum 20 is relatively uniform. Therefore, this rotation process causes less vibration to the rotating shaft, bearings, couplings, etc. When the rotating drum 20 continues to rotate from the horizontal state to the vertical state, the coal slurry will flow violently downward under the action of gravity, resulting in a sudden change in the center of gravity of the coal slurry, causing violent vibration of the rotating shaft, bearings, couplings, etc., and making the above structures easily damaged. In addition, the coal slurry will quickly pour to one side of the cylinder body, resulting in a too large mass difference between the two ends of the rotating shaft of the cylinder body, uneven force on the rotating shaft, and further aggravating the burden on the above transmission structure, making it easily damaged. Therefore, the inventor thought that if the damping could be increased during the process of the rotating drum 20 rotating from the horizontal state to the vertical state, so that the coal slurry would not quickly pour to one side of the cylinder body, the two ends of the rotating shaft could be evenly stressed to the greatest extent, thus ensuring the service life of the rotating shaft, bearings, and couplings. According to the above inventive concept, the technical solution of this embodiment is as follows:

[0027] As Figure 1 and Figure 2As shown in the figure, the drum slime test device of this embodiment includes: a frame 10, a drum 20, a driving structure 30, a first magnetic device 40, and a second magnetic device 50. Among them, the drum 20 includes a cylindrical body 21, a cover body 22 covering the cylindrical body 21, and a rotating shaft 23 provided on the side wall of the cylindrical body 21. The rotating shaft 23 is rotatably provided on the frame 10, and the axial direction of the rotating shaft 23 is perpendicular to the axial direction of the drum 20; the driving structure 30 is provided on the frame 10, and the driving structure 30 can drive the rotating shaft 23 to rotate; the first magnetic device 40 is provided on the cylindrical body 21 and has a first distance from the rotating shaft 23; the second magnetic device 50 is provided on the frame 10 and has a second distance from the rotating shaft 23. When the drum rotates from the vertical state to the horizontal state, the first magnetic device 40 and the second magnetic device 50 approach each other, and the first magnetic device 40 and the second magnetic device 50 are magnetically coupled with each other.

[0028] Applying the technical solution of this embodiment, the drum slime test device includes a frame 10 and a drum 20 rotatably provided on the frame 10. The drum 20 is used to hold the raw coal to be washed and water. The driving structure 30 is used to provide power for the rotation of the drum 20. There is always a magnetic attraction force between the first magnetic device 40 and the second magnetic device 50, forming a magnetic coupling. During the test, when the driving structure 30 is started and the drum 20 rotates from the vertical state to the horizontal state, since a magnetic attraction force will be generated between the first magnetic device 40 and the second magnetic device 50, the magnetic attraction force will become an auxiliary force when the drum 20 rotates from the vertical state to the horizontal state, enabling the driving device to more easily drive the drum 20 from the vertical state to the horizontal state. When the drum 20 rotates to the horizontal state, the distance between the first magnetic device 40 and the second magnetic device 50 is the closest, and the magnetic attraction force is the largest. When the drum 20 rotates from the horizontal state to the vertical state, the magnetic attraction force between the first magnetic device 40 and the second magnetic device 50 will form a damping force on the rotation of the drum 20, thereby reducing the rotation speed of the drum 20, so that the pouring speed of the coal slurry is reduced, so as to ensure that the two ends of the rotating shaft can be evenly stressed to the greatest extent, thereby ensuring the service life of the rotating shaft 23.

[0029] It should be noted that, in this embodiment, the driving structure 30 further includes a driving motor, a transmission connected to the driving motor, and a coupling connecting the driving motor and the rotating shaft 23. Adopting the technical solution of this embodiment can also effectively reduce the damage to the above-mentioned driving structure 30 and extend the service life of the above-mentioned driving structure.

[0030] It should also be noted that the above-mentioned "vertical state" refers to the natural state of the drum 20 under its own gravity. The above-mentioned "horizontal state" refers to the state in which the drum 20 is perpendicular to the "vertical state".

[0031] Such as Figure 1 and Figure 2As shown, in this embodiment, the frame 10 includes a support frame 11 and a cross beam 12 disposed on the support frame 11. The cross beam 12 is located outside the cylinder body 21, and the rotating shaft 23 and the second magnetic device 50 are connected to the cross beam 12. In the above structure, when the rotating drum 20 rotates to the horizontal state, the axis of the rotating drum 20 and the axial center line of the cross beam 12 are in the same plane. Therefore, when the rotating drum 20 rotates to the horizontal state, the distance between the first magnetic device 40 and the second magnetic device 50 is the closest, and the magnetic suction force between the first magnetic device 40 and the second magnetic device 50 is the strongest, so that when the rotating drum rotates from the horizontal state to the vertical state, a sufficient large damping will be generated between the cross beam 12 and the rotating drum 20, so that the rotating shaft 23 of the rotating drum 20 will not be subjected to large vibrations, thereby extending its service life.

[0032] It should also be noted that the cross beam 12 can be provided in two, and each cross beam 12 is provided with a second magnetic device 50. Correspondingly, the rotating drum 20 is also provided with two sets of first magnetic devices 40.

[0033] As Figure 1 and Figure 2 As shown, in this embodiment, the first magnetic device 40 includes a first magnet 41 and a second magnet 42, and the first magnet 41 and the second magnet 42 are spaced along the axial direction of the cylinder body 21; the second magnetic device 50 includes a third magnet 51 and a fourth magnet 52, and the third magnet 51 and the fourth magnet 52 are spaced along the length direction of the cross beam 12; wherein, the first magnet 41 and the third magnet 51 are magnetically coupled, and the second magnet 42 and the fourth magnet 52 are magnetically coupled. In the above structure, the first magnetic device 40 includes a first magnet 41 and a second magnet 42, and the first magnet 41 and the second magnet 42 are respectively located on both sides of the rotating shaft 23. Correspondingly, the second magnetic device 50 includes a third magnet 51 and a fourth magnet 52, and the third magnet 51 and the fourth magnet 52 are also respectively located on both sides of the rotating shaft 23. A magnetic suction force can be generated between the first magnet 41 and the third magnet 51, and a magnetic suction force can be generated between the second magnet 42 and the fourth magnet 52, so that the rotating drum 20 is easier to rotate from the vertical state to the horizontal state and more difficult to rotate from the horizontal state to the vertical state. Furthermore, when the rotating drum 20 rotates from the vertical state to the horizontal state, an auxiliary force is provided for the rotation of the rotating drum, saving the energy consumption of the driving structure 30, and when the rotating drum 20 rotates from the horizontal state to the vertical state, a damping is provided for the rotating drum 20, improving the balance of the force received by the rotating shaft 23 during rotation and extending the service life of the rotating shaft and the driving structure.

[0034] As Figure 1 and Figure 2As shown, in this embodiment, the ratio between the first distance and the second distance is between 0.6 and 1. In the above structure, the first magnet 41 is arranged on the cylinder body 21, and the third magnet 51 is arranged on the cross beam 12. If both the first magnet 41 and the third magnet 51 are at a relatively large distance from the rotating shaft 23, when the rotating cylinder 20 is in the vertical state, the distance between the first magnet 41 and the third magnet 51 will be larger, and the magnetic attraction force will be weaker. If both the first magnet 41 and the third magnet 51 are at a relatively close distance from the rotating shaft 23, the torque generated by the magnetic attraction force is too small to provide a large enough auxiliary force for the rotation of the rotating cylinder 20 when it rotates from the vertical state to the horizontal state, and it is also difficult to provide a large enough damping force for the rotating cylinder 20 when it rotates from the horizontal state to the vertical state. Therefore, the first magnet 41 can be arranged closer to the rotating shaft 23, that is, the first distance between the first magnet 41 and the rotating shaft 23 is less than the second distance between the third magnet 51 and the rotating shaft 23, which not only shortens the distance between the first magnet 41 and the third magnet 51, but also ensures that the magnetic attraction force has a large enough torque. Preferably, in this embodiment, the ratio between the first distance and the second distance is between 0.7 and 0.9.

[0035] As Figure 1 and Figure 2 shown, in this embodiment, both the first magnet 41 and the second magnet 42 are permanent magnets, and both the third magnet 51 and the fourth magnet 52 are electromagnets. In the above structure, it is easier to adjust the magnetic force and magnetic on-off of the electromagnet, making the control of the rotating cylinder slime-forming test device more flexible.

[0036] As Figure 1 and Figure 2 shown, in this embodiment, the first magnet 41, the second magnet 42, the third magnet 51, and the fourth magnet 52 are all permanent magnets. The above structure has a lower production cost, and at the same time, it can also achieve a better effect of extending the service life of the drive structure 30 and the rotating shaft 23.

[0037] As Figures 1 to 3 shown, in this embodiment, both the third magnet 51 and the fourth magnet 52 include a solenoid 511 arranged on the cross beam 12, a core 512 arranged in the solenoid 511, and a coil 513 wound around the outside of the solenoid 511. In the above structure, when the coil 513 is energized, one end of the solenoid 511 close to the rotating cylinder 20 can generate a magnetic attraction force, which is magnetically attracted and matched with the first magnetic device on the rotating cylinder 20.

[0038] It should be noted that, in this embodiment, both the first magnet 41 and the second magnet 42 are rectangular structures. The solenoid 511 is a conical cylinder structure, and the small head of the conical cylinder structure faces the rotating cylinder 20.

[0039] It should also be noted that as Figure 3As shown, in this embodiment, the rotary drum slime-forming test device further includes a power source electrically connected to the coil 513 and a controller for controlling the on / off of the power source. The above structure can facilitate the generation and stop of the magnetic attraction force of the third magnet 51 and the fourth magnet 52, thereby facilitating the installation or maintenance of the rotary drum slime-forming test device.

[0040] As Figure 1 and Figure 2 shown, in this embodiment, the cylinder body 21 and the cover body 22 are hermetically connected through a flange structure. In the above structure, since the coal slurry needs to be contained in the rotary drum 20 and the coal slurry also needs to roll in the rotary drum 20, the sealing performance of the rotary drum 20 needs to be ensured. Setting the cylinder body 21 and the cover body 22 in the form of hermetic connection by a flange structure can ensure the sealing performance between the cylinder body 21 and the cover body 22. At the same time, it can also ensure that the cylinder body 21 and the cover body 22 are stably connected and will not be easily separated due to the collision of the coal slurry and the centrifugal force received by the rotary drum.

[0041] Specifically, a sealing ring can be further provided between the flange structures to further improve the sealing performance between the cylinder body 21 and the cover body 22.

[0042] As Figure 1 and Figure 2 shown, in this embodiment, the rotary drum slime-forming test device further includes a water inlet pipe 60 provided on the cover body 22. Setting the water inlet pipe facilitates the injection of water into the cylinder body 21 to form the coal slurry required for the test. In addition, a handle 70 is provided on the cover body 22. It can facilitate the operator to hold the cover body 22 and is convenient to operate.

[0043] It should be noted that, as Figure 4 shown, in order to further reduce the pouring speed of the coal slurry when the rotary drum 20 rotates from the horizontal state to the vertical state, an inner cylinder 24 can be provided in the cylinder body 21. The inner cylinder 24, the cover body 22 and the bottom of the cylinder body 21 enclose a flowing space for the coal slurry. The inside of the inner cylinder is in a shape similar to an hourglass, and the diameter of the inner cylinder first decreases and then increases in the direction from the first end to the second end of the cylinder body 21. That is, the volumes at both ends of the inner cylinder are larger, and the volume near the rotating shaft in the middle is smaller, so that when the rotary drum 20 rotates from the horizontal state to the vertical state, the pouring speed of the coal slurry can be reduced and the balance at both ends of the rotating shaft can be improved.

[0044] Specifically, the ratio of the minimum inner diameter to the maximum inner diameter of the inner cylinder 24 is between 0.6 and 0.9.

[0045] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary explanation, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0046] For the convenience of description, spatial relative terms such as "above", "over", "on the upper surface", "above-mentioned", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to cover different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0047] In addition, it should be noted that using words such as "first", "second", etc. to limit components is only for the convenience of differentiating the corresponding components. Without additional statement, the above words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

[0048] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A rotary drum slime test device, characterized in that Comprising: A frame (10); A rotating drum (20), the rotating drum (20) comprising a drum body (21), a cover body (22) covering the drum body (21), and a rotating shaft (23) provided on the side wall of the drum body (21), the rotating shaft (23) being rotatably provided on the frame (10), and the axis direction of the rotating shaft (23) being perpendicular to the axis direction of the rotating drum (20); A driving structure (30), provided on the frame (10), the driving structure (30) being capable of driving the rotating shaft (23) to rotate; A first magnetic device (40), provided on the drum body (21) and having a first distance from the rotating shaft (23); A second magnetic device (50), provided on the frame (10) and having a second distance from the rotating shaft (23), when the rotating drum (20) rotates from a vertical state to a horizontal state, the first magnetic device (40) and the second magnetic device (50) approach each other, and the first magnetic device (40) and the second magnetic device (50) are magnetically coupled to each other; Wherein, the frame (10) comprises a support frame (11) and a cross beam (12) provided on the support frame (11), the cross beam (12) being located outside the drum body (21), and the rotating shaft (23) and the second magnetic device (50) are connected to the cross beam (12).

2. The rotating drum slime-forming test device according to claim 1, wherein The first magnetic device (40) comprises a first magnet (41) and a second magnet (42), the first magnet (41) and the second magnet (42) being spaced apart in the axial direction of the drum body (21); The second magnetic device (50) comprises a third magnet (51) and a fourth magnet (52), the third magnet (51) and the fourth magnet (52) being spaced apart along the length direction of the cross beam (12); Wherein, the first magnet (41) and the third magnet (51) are magnetically coupled to each other, and the second magnet (42) and the fourth magnet (52) are magnetically coupled to each other.

3. The rotary drum slime test device according to claim 1, characterized in that, The ratio between the first distance and the second distance is between 0.6 and 1.

4. The rotary drum slime test device according to claim 2, characterized in that, The first magnet (41) and the second magnet (42) are both permanent magnets, and the third magnet (51) and the fourth magnet (52) are both electromagnets.

5. The rotary drum slime test device according to claim 2, wherein, The first magnet (41), the second magnet (42), the third magnet (51), and the fourth magnet (52) are all permanent magnets.

6. The rotary drum slime test device according to claim 2, characterized in that, The third magnet (51) and the fourth magnet (52) each comprise a solenoid (511) provided on the cross beam (12), a core body (512) provided in the solenoid (511), and a coil (513) wound outside the solenoid (511).

7. The rotary drum slime test device according to claim 6, characterized in that, The rotating drum slime-forming test device further comprises a power supply electrically connected to the coil (513) and a controller for controlling the on / off of the power supply.

8. The rotary drum slime test device according to claim 1, wherein, The drum body (21) and the cover body (22) are hermetically connected through a flange structure.

9. The rotating drum slime-forming test device according to claim 1, wherein The rotary drum slime test device further includes a water inlet pipe (60) arranged on the cover body (22); and / or, A handle (70) is arranged on the cover body (22).

Images