Tungsten and molybdenum powder screening device

Abstract

The utility model relates to a tungsten molybdenum powder screening device, which relates to the technical field of powder material screening, and comprises a screening cylinder, a discharge cylinder, a cover plate and other components, and the screening cylinder is equipped with a detachable filter screen and a mechanical system for driving the filter screen to rotate. The device is characterized in that the sleeve and the partition plate which can be driven to rotate are arranged in the screening barrel, the agglomeration phenomenon during tungsten and molybdenum powder screening can be effectively reduced, and the retention time of the powder in the screening barrel is prolonged. In addition, the device is provided with separated cavities, so that the possibility that small-size powder is discharged along with large-size powder is reduced. The screening device has the effect of improving the screening efficiency and precision.

Description

Technical Field

[0001] The present application relates to the technical field of powder material screening, and in particular to a tungsten-molybdenum powder screening device. Background Art

[0002] With the advancement of materials science, tungsten and molybdenum powders have been widely used in many industrial fields, such as electronics, aerospace, chemical industry, etc. In the production process, there are strict requirements on the particle size of tungsten and molybdenum powders, so the screening device has become an indispensable equipment.

[0003] At present, tungsten and molybdenum powders are screened by using a vibrating screen, which includes a screen drum, a screen mesh, a vibrator, a damping spring and other components. The working principle of the vibrating screen is mainly to vibrate the screen box and the screen mesh through the exciting force generated by the vibrator, so that the material jumps and throws on the screen mesh. In this process, material particles smaller than the mesh aperture will fall through the screen mesh to achieve material classification. Adjusting the exciting force of the vibrator can change the movement speed and throwing intensity of the material on the screen mesh, thereby adjusting the screening efficiency and screening accuracy.

[0004] Regarding the above-mentioned related technologies, during the vibration of the screen, tungsten-molybdenum powders will agglomerate, causing the tungsten-molybdenum powders to easily clog the screen during the screening process. Small-sized tungsten-molybdenum powders will be discharged from the outlet of the screen cylinder together with large-sized tungsten-molybdenum powders, reducing the screening efficiency and accuracy. Utility Model Content

[0005] In order to improve screening efficiency and accuracy, the present application provides a tungsten and molybdenum powder screening device.

[0006] The present application provides a tungsten and molybdenum powder screening device, which adopts the following technical solution:

[0007] A tungsten-molybdenum powder screening device comprises a screening drum, a discharging drum and a cover plate, wherein the upper end of the screening drum is detachably connected to the cover plate, the lower end of the screening drum is detachably connected to the discharging drum, the side wall of the screening drum is connected to a discharging pipe, a filter is arranged in the screening drum, a feed pipe is arranged on the cover plate, a vibration motor is arranged at the lower end of the discharging drum, a driving member for driving the rotating shaft to rotate is arranged on the cover plate, a rotating shaft is connected to the output end of the driving member, a first sleeve is sleeved on the lower end of the rotating shaft, the rotating shaft and the first sleeve rotate synchronously and coaxially, the first sleeve is located on the upper end surface of the filter, a plurality of partitions abutting the filter are evenly arranged on the outer wall of the first sleeve along the circumferential direction, the partitions and the first sleeve divide the screening drum into a plurality of chambers, the partitions are rotatably connected to the screen along the axis of the first sleeve, the chamber connected to the feed pipe is different from the chamber connected to the discharging pipe.

[0008] By adopting the above technical solution, the driving member is used to drive the rotating shaft to rotate, driving the first sleeve and the rotating shaft to rotate synchronously, and the first sleeve drives the tungsten-molybdenum powder in the screen to turn over through the partition. This setting reduces the agglomeration of tungsten-molybdenum powder during screening and increases the screening time of tungsten-molybdenum powder in the screening cylinder. The partition separates the screening cylinder, and the feed port and the discharge port are not in the same chamber, which reduces the situation where small-sized tungsten-molybdenum powder will be discharged from the outlet of the screen cylinder together with large-sized tungsten-molybdenum powder, thereby improving the screening efficiency and accuracy.

[0009] Optionally, a second sleeve coaxial with the first sleeve is inserted at the lower end of the first sleeve, the lower end of the second sleeve is fixedly connected to the filter, the first sleeve is rotatably connected to the second sleeve along its own axis, and the outer wall diameter of the second sleeve is larger than the inner wall diameter of the first sleeve.

[0010] By adopting the above technical solution, the second sleeve is used to support and position the first sleeve, and the second sleeve is connected to the filter screen, so that when the screen screen is vibrated, the first sleeve can maintain circumferential rotation.

[0011] Optionally, a material guide plate is provided above the partition, the material guide plate is fixedly connected to the screening cylinder, a material guide port is provided on the material guide plate, the height of the material guide plate gradually decreases from the side in contact with the screening cylinder to the axis direction of the rotating shaft, the area of ​​the material guide port is smaller than the area of ​​the chamber, and the chamber connected to the material guide port is the same as the chamber connected to the feed pipe.

[0012] By adopting the above technical solution, the input material is guided by the guide plate, and the guide plate is set to be inclined so that the material on the guide plate can slide smoothly from the guide port into the corresponding chamber.

[0013] Optionally, the material guide plate is provided with baffles on both sides of the material guide port, and the lower end of the baffle abuts against the upper end of the partition.

[0014] By adopting the above technical solution, the baffle is used to limit the material falling through the guide plate to prevent the material from scattering into the chamber connected to the discharge pipe, reduce the situation where small-sized tungsten-molybdenum powder is discharged from the outlet of the screen cylinder together with large-sized tungsten-molybdenum powder, and improve the screening efficiency and accuracy.

[0015] Optionally, a third sleeve is provided at the upper end of the first sleeve, the rotating shaft passes through the third sleeve, the rotating shaft and the third sleeve rotate synchronously and coaxially, the third sleeve is rotatably connected to the guide plate along its own axis, and a plurality of guide rods are evenly provided on the outer wall of the third sleeve along the circumferential direction, and the lower end surface of the guide rod is in contact with the guide plate.

[0016] By adopting the above technical solution, the rotating shaft drives the third sleeve to rotate synchronously, and the third sleeve drives the guide rod to rotate. The guide rod scrapes the material on the surface of the guide plate to the guide port and then falls into the chamber, which can break up the agglomeration of powder and reduce the situation where the powder adheres to the guide plate.

[0017] Optionally, a support ring is provided below the screen, and an ultrasonic transmitter is connected to the lower end of the support ring, and the ultrasonic transmitter is fixed to the outer wall of the screening cylinder.

[0018] By adopting the above technical solution, the support ring is used to support and position the screen, and by setting an ultrasonic transmitter, ultrasonic waves can be transmitted to the filter. Ultrasonic waves can be used to further reduce the situation where metal powder blocks the filter, thereby further improving the screening efficiency.

[0019] Optionally, there are a plurality of screening cylinders, and the plurality of screening cylinders are vertically distributed between the discharge cylinder and the cover plate.

[0020] By adopting the above technical solution, multiple screening cylinders are stacked to perform multi-stage screening processing, obtain metal powders of different mesh sizes, and improve the functionality and practicality of the screening device.

[0021] Optionally, the inner wall diameter of the second sleeve is the same as the diameter of the first sleeve, a rotating rod is rotatably connected inside the second sleeve, the rotating rod rotates synchronously and coaxially with the first sleeve, and the upper and lower ends of the rotating rod are inserted into the first sleeve.

[0022] By adopting the above technical solution, when multiple screening drums are stacked, the rotating rod of the upper screening drum is inserted into the first sleeve of the lower screening drum, driving the partition of the lower screening drum to rotate, thereby improving the convenience of the device.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The driving member drives the rotating shaft to rotate, driving the first sleeve and the rotating shaft to rotate synchronously. The first sleeve drives the tungsten and molybdenum powders in the screen to turn over through the partition. This setting reduces the agglomeration of tungsten and molybdenum powders during screening and increases the screening time of tungsten and molybdenum powders in the screening cylinder. The partition separates the screening cylinder, and the feed port and the discharge port are not in the same chamber, which reduces the situation that small-sized tungsten and molybdenum powders will be discharged from the outlet of the screen cylinder together with large-sized tungsten and molybdenum powders, thereby improving the screening efficiency and accuracy;

[0025] 2. Use the second sleeve to support and position the first sleeve, and connect the second sleeve to the filter screen, so that when the screen screen is vibrated, the first sleeve can maintain circumferential rotation;

[0026] 3. Use the guide plate to guide the input material, and set the guide plate to be inclined so that the material on the guide plate can slide smoothly from the guide port into the corresponding chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a tungsten-molybdenum powder screening device.

[0028] Figure 2 yes Figure 1 Schematic cross-section diagram of .

[0029] Figure 3 yes Figure 2 A magnified schematic diagram of center A.

[0030] Figure 4 It is a schematic diagram of the structure of the driving member, rotating shaft, guide plate and screen.

[0031] Figure 5 yes Figure 4 Schematic diagram of the explosion structure cross section.

[0032] Explanation of the reference numerals: 1. Screening cylinder; 11. Discharge pipe; 12. Filter screen; 121. Second sleeve; 13. First sleeve; 131. Partition plate; 14. Rotating shaft; 15. Third sleeve; 16. Support ring; 17. Ultrasonic transmitter; 2. Discharge cylinder; 21. Vibration motor; 3. Cover plate; 31. Feed pipe; 32. Driving member; 4. Guide plate; 41. Guide port; 42. Baffle; 43. Guide rod; 5. Rotating rod. DETAILED DESCRIPTION

[0033] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0034] The embodiment of the present application discloses a tungsten-molybdenum powder screening device.

[0035] Reference Figure 1 and Figure 2 A tungsten-molybdenum powder screening device comprises a screening drum 1, a discharge drum 2 and a cover plate 3. The upper end of the screening drum 1 is detachably connected to the cover plate 3, and the lower end of the screening drum 1 is detachably connected to the discharge drum 2. A discharge pipe 11 is provided on the side wall of the screening drum 1 for discharging the screened material. A filter screen 12 is provided in the screening drum 1 to screen the material. A feed pipe 31 is provided on the cover plate 3 for the material to enter the screening drum 1. A driving member 32 is also provided on the cover plate 3 for providing power to drive the rotating shaft 14 to rotate. A vibration motor 21 is provided at the lower end of the discharge drum 2 for vibrating the screen to screen the tungsten-molybdenum powder.

[0036] Reference Figure 2 and Figure 3 The output end of the driving member 32 is connected to a rotating shaft 14, and a first sleeve 13 is sleeved on the outer side of the lower end of the rotating shaft 14. A protrusion can be provided on the side wall of the rotating shaft 14, and a groove corresponding to the protrusion can be provided on the inner wall of the first sleeve 13 to ensure that the rotating shaft 14 and the first sleeve 13 can rotate synchronously.

[0037] Reference Figure 2 and Figure 3The first sleeve 13 is located above the filter screen 12, and a plurality of partitions 131 abutting against the filter screen 12 are evenly arranged on the outer wall of the first sleeve 13 along the circumferential direction. These partitions 131 and the first sleeve 13 divide the internal space of the screening cylinder 1 into a plurality of chambers. This arrangement ensures that when the material enters a chamber from the feed pipe 31, it will not be immediately discharged from the discharge pipe 11, because the chamber connected to the feed pipe 31 is different from the chamber connected to the discharge pipe 11. Each partition 131 can be rotatably connected to the screen along the axis of the first sleeve 13.

[0038] Reference Figure 2 and Figure 3 Specifically, the first sleeve 13 rotates through the driving member 32 and the rotating shaft 14, thereby driving the partition 131 to move circumferentially. This movement helps to reduce the agglomeration of materials during the screening process, increases the retention and screening time of materials in the screening cylinder 1, and thus improves the screening efficiency. At the same time, since the feed port and the discharge port are distributed in different chambers, the situation where small-sized powders are discharged together with large-sized powders is effectively reduced, further ensuring the screening accuracy.

[0039] Reference Figure 2 and Figure 3 A second sleeve 121 coaxial with the first sleeve 13 is inserted at the lower end thereof. The lower end of the second sleeve 121 is fixedly connected to the filter screen 12. The outer wall diameter of the second sleeve 121 is designed to be larger than the inner wall diameter of the first sleeve 13. The second sleeve 121 not only provides support and positioning for the first sleeve 13, but also allows the first sleeve 13 to maintain its circumferential rotation function when the screen screen is vibrated.

[0040] Reference Figure 2 and Figure 4 In addition, a guide plate 4 is provided above the partition 131, and the guide plate 4 is fixedly connected to the screening drum 1. A guide opening 41 is provided on the guide plate 4, and the area of ​​the guide opening 41 is designed to be smaller than the area of ​​the chamber. The height of the guide plate 4 from the side that fits the screening drum 1 to the axis direction of the rotating shaft 14 is gradually reduced, and such a design ensures that the material can smoothly slide into the corresponding chamber through the guide opening 41.

[0041] Reference Figure 4 Furthermore, baffles 42 are provided on both sides of the guide port 41 of the guide plate 4, and the lower ends of the baffles 42 are in contact with the upper ends of the partitions 131. The baffles 42 are used to limit the material and prevent it from scattering into the chamber connected to the discharge pipe 11, thereby further improving the screening accuracy.

[0042] Reference Figure 3The third sleeve 15 is provided at the upper end of the first sleeve 13, and the rotating shaft 14 passes through the third sleeve 15. A protrusion can be provided on the side wall of the rotating shaft 14, and a groove corresponding to the protrusion is provided on the inner wall of the third sleeve 15 to ensure that the rotating shaft 14 and the third sleeve 15 can rotate synchronously. The third sleeve 15 is rotatably connected with the guide plate 4 along its own axis. A plurality of guide rods 43 are evenly provided along the circumferential direction on the outer side wall of the third sleeve 15, and the lower end surface of the guide rod 43 abuts against the guide plate 4. The rotating shaft 14 drives the third sleeve 15 to rotate, and the third sleeve 15 drives the guide rod 43 to rotate. The guide rod 43 scrapes the material on the surface of the guide plate 4 to the guide port 41 and then falls into the chamber, which can break up the agglomeration of the powder and reduce the situation that the powder adheres to the guide plate 4.

[0043] Reference Figure 2 and Figure 5 A support ring 16 is provided below the screen, and the support ring 16 supports and positions the screen. An ultrasonic transmitter 17 is connected to the lower end of the support ring 16, and the ultrasonic transmitter 17 is fixed to the outer wall of the screening cylinder 1. The ultrasonic transmitter 17 can transmit ultrasonic waves to the filter 12, and use ultrasonic waves to further reduce the situation where metal powder blocks the filter 12, thereby further improving the screening efficiency.

[0044] Reference Figure 1 and Figure 2 , multiple screening cylinders 1 can be provided, and the screening cylinders 1 are distributed in the vertical direction between the discharge cylinder 2 and the cover plate 3. Multiple screening cylinders 1 are stacked to perform multi-stage screening processing to obtain metal powders of different mesh sizes, thereby improving the functionality and practicality of the screening device.

[0045] Reference Figure 3 and Figure 5 The inner diameter of the second sleeve 121 is the same as that of the first sleeve 13. The second sleeve 121 is rotatably connected with a rotating rod 5. A protrusion can be provided on the side wall of the rotating rod 5. A groove corresponding to the protrusion is provided on the inner wall of the first sleeve 13 to ensure that the rotating rod 5 and the first sleeve 13 can rotate synchronously. When multiple screening drums 1 are stacked, the rotating rod 5 of the upper screening drum 1 is inserted into the first sleeve 13 of the lower screening drum 1, driving the partition 131 of the lower screening drum 1 to rotate. At this time, the upper and lower ends of the rotating rod 5 are inserted into the first sleeve 13, which improves the convenience of the device.

[0046] The implementation principle of a tungsten-molybdenum powder screening device in an embodiment of the present application is: the driving member 32 is used to drive the rotating shaft 14 to rotate, the first sleeve 13 and the rotating shaft 14 rotate synchronously, and the first sleeve 13 drives the tungsten-molybdenum powder in the screen to turn over through the partition 131. This setting reduces the agglomeration phenomenon of the tungsten-molybdenum powder during screening and increases the screening time of the tungsten-molybdenum powder in the screening cylinder 1. The partition 131 separates the screening cylinder 1, and the feed port and the discharge port are not in the same chamber, which reduces the situation where small-sized tungsten-molybdenum powder will be discharged from the outlet of the screen cylinder together with large-sized tungsten-molybdenum powder, thereby improving the screening efficiency and accuracy.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tungsten-molybdenum powder screening device, comprising a screening drum (1), a discharge drum (2) and a cover plate (3), wherein the upper end of the screening drum (1) is detachably connected to the cover plate (3), the lower end of the screening drum (1) is detachably connected to the discharge drum (2), the side wall of the screening drum (1) is connected to a discharge pipe (11), a filter screen (12) is provided in the screening drum (1), a feed pipe (31) is provided on the cover plate (3), and a vibration motor (21) is provided at the lower end of the discharge drum (2), characterized in that: The cover plate (3) is provided with a driving member (32) for driving the rotating shaft (14) to rotate. The output end of the driving member (32) is connected to the rotating shaft (14). The lower end of the rotating shaft (14) is sleeved with a first sleeve (13). The rotating shaft (14) and the first sleeve (13) rotate synchronously and coaxially. The first sleeve (13) is located on the upper end surface of the filter screen (12). The outer wall of the first sleeve (13) is evenly provided with a plurality of partitions (131) abutting against the filter screen (12) along the circumferential direction. The partitions (131) and the first sleeve (13) divide the screening cylinder (1) into a plurality of chambers. The partitions (131) are rotatably connected to the screen along the axis of the first sleeve (13). The chamber communicated with the feed pipe (31) is different from the chamber communicated with the discharge pipe (11).

2. A tungsten-molybdenum powder screening device according to claim 1, characterized in that: A second sleeve (121) coaxial with the first sleeve (13) is inserted at the lower end of the first sleeve (13); the lower end of the second sleeve (121) is fixedly connected to the filter screen (12); the first sleeve (13) is rotatably connected to the second sleeve (121) along its own axis; the outer wall diameter of the second sleeve (121) is greater than the inner wall diameter of the first sleeve (13).

3. A tungsten-molybdenum powder screening device according to claim 1, characterized in that: A material guide plate (4) is provided above the partition plate (131), the material guide plate (4) being fixedly connected to the screening drum (1), and a material guide opening (41) is provided on the material guide plate (4), the height of the material guide plate (4) gradually decreasing from the side contacting the screening drum (1) to the axial direction of the rotating shaft (14), the area of ​​the material guide opening (41) being smaller than the area of ​​the chamber, and the chamber connected to the material guide opening (41) is the same as the chamber connected to the feeding pipe (31).

4. A tungsten-molybdenum powder screening device according to claim 3, characterized in that: The material guide plate (4) is provided with baffles (42) on both sides of the material guide opening (41), and the lower end of the baffle (42) abuts against the upper end of the partition plate (131).

5. The tungsten-molybdenum powder screening device according to claim 3 is characterized in that: A third sleeve (15) is provided at the upper end of the first sleeve (13), the rotating shaft (14) passes through the third sleeve (15), the rotating shaft (14) and the third sleeve (15) rotate synchronously and coaxially, the third sleeve (15) is rotatably connected to the guide plate (4) along its own axis, and a plurality of guide rods (43) are evenly arranged on the outer wall of the third sleeve (15) along the circumferential direction, and the lower end surfaces of the guide rods (43) are in contact with the guide plate (4).

6. A tungsten-molybdenum powder screening device according to claim 1, characterized in that: A support ring (16) is provided below the screen, and an ultrasonic transmitter (17) is connected to the lower end of the support ring (16). The ultrasonic transmitter (17) is fixedly mounted on the outer wall of the screening cylinder (1).

7. A tungsten-molybdenum powder screening device according to claim 2, characterized in that: A plurality of screening cylinders (1) are provided, and the plurality of screening cylinders (1) are distributed between the discharge cylinder (2) and the cover plate (3) in a vertical direction.

8. A tungsten-molybdenum powder screening device according to claim 7, characterized in that: The inner wall diameter of the second sleeve (121) is the same as that of the first sleeve (13); a rotating rod (5) is rotatably connected inside the second sleeve (121); the rotating rod (5) and the first sleeve (13) rotate synchronously and coaxially; the upper and lower ends of the rotating rod (5) are inserted into the first sleeve (13).

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