Grading impeller and airflow grading device

Abstract

The grading impeller comprises an installation pipe, a disc is coaxially arranged at the bottom of the installation pipe, and a circular ring is coaxially arranged in the middle section of the installation pipe. The bottom face of the circular ring and the top face of the disc are provided with sliding grooves in one-to-one correspondence. Blades with the same number as the chutes are arranged on the outer side of the mounting pipe, and the upper and lower ends of the blades are slidably arranged in the corresponding chutes of the circular ring and the disc respectively. An adjusting rod is coaxially arranged in the mounting pipe in a penetrating mode, the adjusting rod is connected with the blades through hinge rods, strip-shaped holes are formed in the positions, corresponding to the connecting positions of the hinge rods and the adjusting rod, of the side wall of the mounting pipe, and the adjusting rod is movably arranged along the axis. The airflow grading device comprises a shell and the grading impeller, the grading impeller is arranged in the shell, the upper end of the mounting pipe vertically and upwards penetrates through the top of the shell, and the adjusting screw is located at the top of the shell. According to the scheme, the gaps between the blades of the grading impeller are adjustable, higher practicability is achieved, the production cost can be reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of devices for classifying powder materials by utilizing airflow, and in particular relates to a classifying impeller and an airflow classifying device. Background Art

[0002] The airflow classifier is a commonly used powder material classification device. When working, it uses airflow to guide the material to flow from the gaps between the blades of the classification impeller to the inside of the classification impeller. By setting the gaps between the blades of the classification impeller, the material with larger particle size can be isolated outside the classification impeller, while the material with qualified particle size enters the classification impeller through the gaps between the blades, thereby achieving the purpose of classification.

[0003] Existing classifying impellers typically have fixed blades with fixed gaps between them. This results in a limited range of particle sizes that can be classified by each impeller. When materials with a wider range of particle sizes need to be classified, a different impeller or a different type of classifying device must be used. This increases production costs and affects production efficiency. Utility Model Content

[0004] In order to solve the deficiencies of the existing technology, the utility model provides a grading impeller and an airflow grading device. The gap between the grading impeller blades is adjustable, which has stronger practicality, can reduce production costs and improve production efficiency.

[0005] In order to achieve the purpose of this utility model, the following scheme is proposed:

[0006] A grading impeller comprises: a mounting tube, a disc is coaxially provided at the bottom of the mounting tube, a ring is coaxially provided in the middle section of the mounting tube, the ring and the mounting tube are connected by a plurality of ribs, and the upper end of the mounting tube is used for connecting a driving motor.

[0007] The bottom surface of the ring and the top surface of the disc are provided with corresponding sliding grooves, the extending direction of the sliding grooves is consistent with the radial direction of the mounting tube, and a plurality of sliding grooves are arranged in an array along the circumference of the mounting tube.

[0008] The outer side of the mounting tube is provided with blades having the same number as the slide grooves, and the upper and lower ends of the blades are respectively slidably arranged in the slide grooves provided in a one-to-one correspondence between the ring and the disc.

[0009] An adjusting rod is coaxially passed through the mounting tube, and the adjusting rod is connected to the blade by a hinged rod. The hinged rod and the blade are rotationally connected, and the rotating connection structure is arranged at the middle section of the blade. The hinged rod and the adjusting rod are rotationally connected, and the rotating connection structure is located between the ring and the disc, and a strip hole is opened on the side wall of the mounting tube corresponding to the connection position between the hinged rod and the adjusting rod, and the adjusting rod is arranged to move along the axis.

[0010] An air flow classification device includes a shell and the above-mentioned classification impeller. The classification impeller is arranged inside the shell. The upper end of the mounting tube vertically passes through the top of the shell. A drive motor is arranged at intervals on the top of the shell. The main shaft of the drive motor is connected to the main shaft of the mounting tube. The adjusting screw is located between the top of the shell and the drive motor.

[0011] The beneficial effects of the utility model are that the spacing between the blades can be adjusted from the outside of the airflow classifying device, so that the classifying impeller has a wider classification range, has stronger practicality, reduces the number of spare classifying impellers and classifying devices, reduces production costs, avoids replacing impellers, and can effectively improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present invention.

[0013] Figure 1 The schematic diagram of the structure of the grading impeller of the present application is shown.

[0014] Figure 2 Shown Figure 1 A partial enlarged view of point A in the middle.

[0015] Figure 3 A cross-sectional view of the classifying impeller of the present application is shown.

[0016] Figure 4 A cross-sectional view of the airflow classification device of the present application is shown.

[0017] Markings in the figure: mounting tube-1, disc-11, ring-12, slide groove-13, strip hole-14, blade-2, waist-shaped hole-21, adjusting rod-3, wedge-shaped hole-31, hinged rod-4, latch-41, screw-5, pin-51, adjusting screw-6, housing-7. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the implementation methods of the present invention are described in detail below with reference to the accompanying drawings. However, the embodiments described in the present invention are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Example 1, as Figures 1 to 3 As shown, a grading impeller includes: a mounting tube 1, a disc 11 is coaxially provided at the bottom thereof, a ring 12 is coaxially provided in the middle section of the mounting tube 1, and the ring 12 is connected to the mounting tube 1 by a plurality of ribs, so that the top of the grading impeller is a hollow structure for circulating qualified materials and facilitating the assembly of components inside the grading impeller. The upper end of the mounting tube 1 is used to connect the drive motor.

[0020] Specifically, the bottom surface of the ring 12 and the top surface of the disc 11 are provided with corresponding sliding grooves 13 , the extending direction of the sliding grooves 13 is consistent with the radial direction of the mounting tube 1 , and a plurality of sliding grooves 13 are arranged in an array along the circumference of the mounting tube 1 .

[0021] Specifically, the outer side of the mounting tube 1 is provided with blades 2 having the same number as the chute 13 , and the upper and lower ends of the blades 2 are respectively slidably arranged in the chute 13 provided in the one-to-one correspondence between the ring 12 and the disk 11 .

[0022] Specifically, an adjusting rod 3 is coaxially passed through the mounting tube 1, and the adjusting rod 3 is connected to the blade 2 by a hinge rod 4. The hinge rod 4 and the blade 2 are rotationally connected, and the rotation connection structure is provided in the middle section of the blade 2. The hinge rod 4 and the adjusting rod 3 are rotationally connected, and the rotation connection structure is located between the ring 12 and the disc 11. The axes of the rotational connections at both ends of the hinge rod 4 are parallel to each other; and a strip hole 14 is provided on the side wall of the mounting tube 1 corresponding to the connection position between the hinge rod 4 and the adjusting rod 3, which is used to set the hinge structure between the hinge rod 4 and the adjusting rod 3.

[0023] Specifically, the adjusting rod 3 is arranged to move along the axis, so that the blade 2 can be driven to move along the slide groove 13 through the hinged rod 4, thereby achieving the purpose of adjusting the gap between adjacent blades 2, so that the grading impeller can adapt to the grading work of materials with a larger particle size range; because the slide groove 13 is arranged along the radial direction of the mounting tube 1, it is understandable that when the blade 2 moves along the slide groove 13 toward the center of the mounting tube 1, the gap between adjacent blades 2 will be reduced; on the contrary, when the blade 2 moves along the slide groove 13 toward the outside of the mounting tube 1, the gap between adjacent blades 2 will increase; the above scheme not only avoids the need to stock grading impellers of different specifications, reduces the cost investment of the device, but also reduces the replacement procedure, which can effectively improve production efficiency.

[0024] Preferably, the number of blades 2 is an even number, the number of hinged rods 4 is half the number of blades 2, and the end of each hinged rod 4 is connected to two adjacent blades 2 at the same time, thereby reducing the number of hinged rods 4 and thus reducing the requirement for installation space.

[0025] More preferably, Figures 1 to 3 As shown, the hinged rod 4 is used to connect the two sides of one end of the blade 2 with coaxial pins 41, and the blade 2 is provided with a waist-shaped hole 21 for passing the pin 41. The length of the waist-shaped hole 21 is greater than the outer diameter of the pin 41, and the length direction of the waist-shaped hole 21 is consistent with the radial direction of the mounting tube 1. With this design, even if the pin 41 and the waist-shaped hole 21 are not coaxially arranged, the same hinged rod 4 can be used to simultaneously drive the two blades 2 to move radially along the mounting tube 1.

[0026] Preferably, Figure 2 、 Figure 3As shown, the same cross-section of the adjusting rod 3 is penetrated by a screw rod 5 corresponding to the strip hole 14 one by one. The end of the screw rod 5 protrudes from the outside of the mounting tube 1. The end of the screw rod 5 is rotatably connected to the hinge rod 4 through a pin 51. This connection structure uses the screw rod 5 and the strip hole 14 to form a circumferential limit to prevent the adjusting rod 3 from rotating around the axis; and this structure uses the screw rod 5 to transfer the connection part between the hinge rod 4 and the adjusting rod 3 to the outside of the mounting tube 1, which is more convenient for assembly.

[0027] Preferably, Figure 1 、 Figure 4 As shown, a wedge-shaped hole 31 is provided on one side of the upper end of the adjusting rod 3, and the inclined surface of the wedge-shaped hole 31 is inclined toward the lower outside of the adjusting rod 3. An adjusting screw 6 is radially penetrated through the side wall of the mounting tube 1, and the front end of the adjusting screw 6 contacts the inclined surface of the wedge-shaped hole 31. When the adjusting screw 6 is moved toward the middle of the mounting tube 1, the inclined surface of the wedge-shaped hole 31 can be squeezed by the front end of the adjusting screw 6, thereby moving the adjusting rod 3 upward. When the adjusting screw 6 is moved toward the outside of the mounting tube 1, the adjusting rod 3 will automatically move downward under the action of gravity. When the adjusting rod 3 moves up and down, the hinge rod 4 can be used to drive the blade 2 to move radially along the mounting tube 1; this adjustment structure is not only simple and practical, but also the self-locking function of the thread can be used after the adjusting screw 6 is moved to prevent the adjusting rod 3 from pushing the adjusting screw 6 to move, thereby automatically locking the position of the adjusting rod 3.

[0028] Example 2, as Figure 4 As shown, an air flow classification device includes a shell 7 and a classification impeller described in Example 1. The classification impeller is arranged inside the shell 7. The upper end of the mounting tube 1 vertically passes through the top of the shell 7. A drive motor is arranged at intervals on the top of the shell 7. The main shaft of the drive motor is connected to the main shaft of the mounting tube 1. The adjusting screw 6 is located between the top of the shell 7 and the drive motor, so that the height position of the adjusting rod 3 can be adjusted conveniently outside the shell 7, thereby adjusting the gap between the blades 2.

[0029] The above description is only a preferred embodiment of the present invention and does not represent the only embodiment or limit the present invention. It should be understood by those skilled in the art that various changes or equivalent replacements made to the present invention without departing from the scope of the present invention are within the scope of protection of the present invention.

Claims

1. A classifying impeller, characterized in that: include: A mounting tube (1) is coaxially provided with a disc (11) at its bottom, a coaxially provided ring (12) is provided in the middle section of the mounting tube (1), the ring (12) and the mounting tube (1) are connected via a plurality of ribs, and the upper end of the mounting tube (1) is used for connecting a drive motor; The bottom surface of the ring (12) and the top surface of the disc (11) are provided with corresponding chute grooves (13), the extension direction of the chute grooves (13) is consistent with the radial direction of the mounting tube (1), and a plurality of chute grooves (13) are provided in an array along the circumference of the mounting tube (1); The outer side of the mounting tube (1) is provided with blades (2) having the same number as the chute (13), and the upper and lower ends of the blades (2) are respectively slidably arranged in the chute (13) provided in the ring (12) and the disc (11) in a one-to-one correspondence; An adjusting rod (3) is coaxially passed through the mounting tube (1), the adjusting rod (3) and the blade (2) are connected via a hinge rod (4), the hinge rod (4) and the blade (2) are rotationally connected, the rotation connection structure is arranged at the middle section of the blade (2), the hinge rod (4) and the adjusting rod (3) are rotationally connected, the rotation connection structure is located between the ring (12) and the disc (11), and a strip hole (14) is opened on the side wall of the mounting tube (1) corresponding to the connection portion between the hinge rod (4) and the adjusting rod (3), and the adjusting rod (3) is arranged to move along the axis.

2. A classifying impeller according to claim 1, characterized in that: The number of blades (2) is an even number, the number of hinged rods (4) is half the number of blades (2), and the end of each hinged rod (4) is simultaneously connected to two adjacent blades (2).

3. A classifying impeller according to claim 2, characterized in that: The hinge rod (4) is used to connect one end of the blade (2) and is coaxially provided with a latch (41) on both sides. The blade (2) is provided with a waist-shaped hole (21) for passing the latch (41). The length of the waist-shaped hole (21) is greater than the outer diameter of the latch (41), and the length direction of the waist-shaped hole (21) is consistent with the radial direction of the mounting tube (1).

4. A classifying impeller according to claim 1 or 2, characterized in that: The same cross section of the adjusting rod (3) is penetrated by a screw rod (5) corresponding to the strip hole (14). The end of the screw rod (5) protrudes from the outside of the mounting tube (1). The end of the screw rod (5) is rotatably connected to the hinge rod (4) through a pin (51).

5. The classifying impeller according to claim 1, characterized in that: A wedge-shaped hole (31) is provided on one side of the upper end of the adjusting rod (3), and the inclined surface of the wedge-shaped hole (31) is inclined toward the lower side of the outer side of the adjusting rod (3). An adjusting screw (6) is radially penetrated through the side wall of the mounting tube (1), and the front end of the adjusting screw (6) contacts the inclined surface of the wedge-shaped hole (31).

6. An airflow classification device, characterized in that: The utility model comprises a housing (7) and the grading impeller according to claim 5, wherein the grading impeller is arranged inside the housing (7), the upper end of the mounting tube (1) vertically passes through the top of the housing (7), a driving motor is arranged at intervals on the top of the housing (7), the main shaft of the driving motor is connected to the main shaft of the mounting tube (1), and the adjusting screw (6) is located between the top of the housing (7) and the driving motor.

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