Iron powder drying system

Abstract

The utility model relates to an iron powder drying system which comprises a transversely-arranged drying pipe and further comprises at least two rotary supporting mechanisms arranged on the drying pipe, and each rotary supporting mechanism comprises a fixed outer supporting ring and an inner rotating ring rotationally connected to the inner circle of the outer supporting ring. The inner rotating ring and the drying pipe are coaxially arranged, a plurality of connecting plates which are evenly distributed in the circumferential direction are arranged between the inner rotating ring and the drying pipe, one ends of the connecting plates are connected with the outer ring of the drying pipe in a tangent and attached mode, and the other ends of the connecting plates are hinged to the inner rotating ring. And meanwhile, when the drying pipe expands with heat and contracts with cold and the diameter of the drying pipe changes, the operation can be carried out along the center of the drying pipe, so that the uniform attachment of the sealing positions at the end parts can be ensured, and the sealing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing mechanisms, in particular to an iron powder drying system. Background Art

[0002] Powder metallurgy is a process technology for producing metal powders or using metal powders (or mixtures of metal powders and non-metal powders) as raw materials, and manufacturing metal materials, composite materials, and various types of products through forming and sintering. The powder metallurgy method has similarities with the production of ceramics and both belong to powder sintering technology.

[0003] During the processing of iron powder used in powder metallurgy, magnetic separation and water washing operations are required. After water washing, the iron powder needs to be dried. The drying of iron powder is usually carried out in a drying tube. The drying tube rotates on a horizontal axis, hot air is introduced into the drying tube, the iron powder enters the drying tube from one end, and the iron powder is conveyed and continuously tumbled through the rotation of the drying tube. The iron powder comes into contact with the hot air during the flipping process to achieve drying. In the prior art, the drying tube is supported and rotated by support wheels at the bottom, and the discharge end is connected to a discharge bin. To improve the sealing effect at the connection, the discharge end of the drying tube is inserted into the discharge bin and sealed by a ring of sealing gaskets. However, since the hot air enters from the discharge end of the drying tube, the high temperature easily causes the diameter of the discharge end of the drying tube to change. Since the drying tube is supported at the bottom, the position of the upper end changes according to the temperature, resulting in a poor sealing effect at the upper end and easily causing the upper end seal to fail.

[0004] Moreover, the diameter of the drying tube is very large, and being supported by bottom rollers easily causes continuous stress deformation during rotation, affecting the service life of the drying tube. Summary of the Utility Model

[0005] The utility model aims at the deficiencies of the prior art and provides an iron powder drying system.

[0006] The utility model is realized by the following technical solutions: providing an iron powder drying system, which includes a horizontally arranged drying tube, and at least two slewing bearing mechanisms arranged on the drying tube. The slewing bearing mechanism includes a fixed outer support ring and an inner rotating ring rotatably connected to the inner ring of the outer support ring. The inner rotating ring is coaxially arranged with the drying tube, and a plurality of circumferentially evenly distributed connecting plates are arranged between the inner rotating ring and the drying tube. One end of the connecting plate is tangentially and fittingly connected to the outer circle of the drying tube, and the other end of the connecting plate is hinged to the inner rotating ring.

[0007] As an optimization, it further includes an air outlet bin and an air inlet bin. Both ends of the drying pipe are respectively inserted into the air outlet bin and the air inlet bin, and elastic sealing rings are installed at the insertion holes. The upper and lower ends of the air inlet bin are respectively provided with a hot air inlet and a discharge port, and the upper end of the air outlet bin is provided with a hot air outlet. It further includes a feed hopper penetrating into the air outlet bin, and the lower end of the feed hopper extends into the drying pipe.

[0008] As an optimization, the cross-section of the elastic sealing ring is arc-shaped, and the outer arc surface fits with the drying pipe.

[0009] As an optimization, it further includes a driving mechanism for driving the drying pipe to rotate. The driving mechanism includes a driving motor and a gear ring fixedly connected to the side surface of any one of the inner rotating rings, and a gear meshing with the gear ring is installed on the driving motor.

[0010] As an optimization, an annular groove is formed in the inner ring of the outer support ring, and a plurality of support wheels located in the annular groove are installed on the inner rotating ring.

[0011] As an optimization, the connecting plate is a flat plate, and a hinged connecting piece is fixedly connected to one end thereof, and the hinged connecting piece is hinged to the inner rotating ring.

[0012] As an optimization, one end of the connecting plate is tangentially and fittingly connected to the outer circle of the drying pipe through bolts.

[0013] The beneficial effects of the present utility model are as follows: For a iron powder drying system of the present utility model, the drying pipe is connected to the inner rotating ring through a plurality of connecting plates, so that the drying pipe is connected at multiple circumferential positions, preventing deformation. At the same time, when the drying pipe expands and contracts thermally, when the diameter of the drying pipe changes, it can be carried out along the center of the drying pipe. Therefore, the uniform fitting of the end sealing position can be ensured, and the sealing effect is improved. Description of the Drawings

[0014] Figure 1 is a schematic diagram of the internal structure of the present utility model;

[0015] Figure 2 is the present utility model Figure 1 the enlarged view of part A therein;

[0016] Figure 3 is the present utility model in Figure 2 the sectional view taken along the C-C plane therein;

[0017] Figure 4 is the present utility model Figure 1 the enlarged view of part B therein;

[0018] As shown in the figure:

[0019] 1. Slewing support mechanism, 2. Drying pipe, 3. Deflector inclined plate, 4. Air inlet chamber, 5. Hot air inlet, 6. Discharge port, 7. Elastic sealing ring, 8. Air outlet chamber, 9. Feed hopper, 10. Hot air outlet, 11. Outer support ring, 12. Inner rotating ring, 13. Support wheel, 14. Connecting plate, 15. Hinge connecting piece, 16. Pin shaft, 17. Gear ring, 18. Driving motor, 19. Gear. Specific implementation manner

[0020] To clearly illustrate the technical features of this solution, the following will elaborate on this solution through specific implementation manners.

[0021] As Figures 1 to 4 shown, a kind of iron powder drying system of the present utility model includes a horizontally arranged drying pipe 2. A plurality of deflector inclined plates 3 are arranged inside the drying pipe 2. When the drying pipe 2 rotates, the deflector inclined plates 3 drive the materials to move forward. The deflector inclined plates 3 are prior art and will not be introduced in detail.

[0022] It also includes at least two slewing support mechanisms 1 arranged on the drying pipe 2. In this embodiment, two slewing support mechanisms 1 are arranged and distributed along the length direction of the drying pipe 2, so as to realize the support of the drying pipe 2.

[0023] The slewing support mechanism 1 includes a fixed outer support ring 11 and an inner rotating ring 12 rotatably connected to the inner circle of the outer support ring 11. The inner rotating ring 12 is coaxially arranged with the drying pipe 2. The outer support ring 11 is fixed on the ground. The outer support ring 11 is located outside the inner rotating ring 12 and is coaxially arranged. As Figure 2 , 3 shown, an annular groove is formed in the inner circle of the outer support ring 11. A plurality of support wheels 13 are installed on the inner rotating ring 12 and located in the annular groove. Specifically, in this embodiment, the cross-section of the outer support ring 11 is U-shaped and the opening faces the central position. The outer circle of the inner rotating ring 12 is coaxially arranged inside the outer support ring 11, and the rotational connection between the two is realized through a plurality of support wheels 13 in a circle.

[0024] A plurality of circumferentially evenly distributed connecting plates 14 are arranged between the inner rotating ring 12 and the drying pipe 2. The connecting plates 14 are flat plates. One end of the connecting plate 14 is tangentially and fittingly connected to the outer circle of the drying pipe 2. In this embodiment, one end of the connecting plate 14 is tangentially and fittingly connected to the outer circle of the drying pipe 2 through bolts.

[0025] The other end of the connecting plate 14 is hinged to the inner rotating ring 12. Specifically, an articulated connecting piece 15 is fixedly connected to one end of the connecting plate 14, and the articulated connecting piece 15 is hinged to the inner rotating ring 12. The connecting piece 15 is a fork-shaped structure, and the hinge connection with the inner rotating ring 12 is realized through a pin shaft 16.

[0026] The number of connecting plates 14 should be greater than 6. In this embodiment, 8 connecting plates 14 are provided. Since the connecting plates 14 cannot be telescopic in length, the support of the drying pipe 2 is realized by multiple connecting plates 14 to prevent it from sagging. When the diameter of the drying pipe 2 changes, all the connecting plates deflect to a certain extent through the hinge shaft ends, so that the drying pipe 2 expands and contracts with the center position unchanged.

[0027] It further includes a driving mechanism for driving the rotation of the drying pipe 2. The driving mechanism includes a driving motor 18 and a gear ring 17 fixedly connected to the side surface of any one of the inner rotating rings 12. As Figure 2 shown, the gear ring 17 is fixed to the side surface of the inner rotating ring 12 by a circle of bolts. A gear 19 meshing with the gear ring 17 is installed on the driving motor 18. The rotation of the gear 19 drives the rotation of the gear ring 17, thereby driving the rotation of the inner rotating ring where it is located.

[0028] It further includes an air outlet bin 8 and an air inlet bin 4. Both ends of the drying pipe 2 are respectively inserted into the air outlet bin 8 and the air inlet bin 4, and elastic sealing rings 7 are installed at the insertion holes. As Figure 4 shown, the elastic sealing rings 7 are made of rubber. The rubber is cut into a ring shape. The outer ring is fixed to the air inlet bin 4 or the air outlet bin 8 by a circle of bolts. The inner diameter of the rubber in the free state is smaller than the outer diameter of the drying pipe 2. Therefore, the elastic sealing rings 7 are deformed, and the cross-section of the elastic sealing rings 7 is arc-shaped and the outer arc surface fits with the drying pipe 2. When the outer diameter of the drying pipe 2 changes, the sealing effect can be maintained.

[0029] Hot air inlets 5 and a discharge port 6 are respectively provided at the upper and lower ends of the air inlet bin 4, and hot air enters from the hot air inlet 5.

[0030] A hot air outlet 10 is provided at the upper end of the air outlet bin 8. The hot air is extracted from the hot air outlet 10 through a fan, so that a certain negative pressure is maintained inside the drying pipe 2 to prevent the hot air from overflowing from positions such as the discharge port 6 and the feed hopper 9.

[0031] It further includes a feed hopper 9 penetrating into the air outlet bin 8. The lower end of the feed hopper 9 extends into the drying pipe 2 and is arranged downward to prevent the hot air from entering the feed hopper 9.

[0032] The usage method of the present utility model:

[0033] When drying iron powder, the iron powder is injected from the upper end of the feed hopper 9 and flows downward into the drying pipe 2. The rotation of the drying pipe 2 drives the iron powder to tumble, and at the same time, the iron powder is driven to move forward by the action of the diversion inclined plate 3. The hot air enters the air inlet bin 4 from the hot air inlet 5, then flows along the drying pipe 2, dries the tumbling iron powder inside, and finally the hot air is discharged from the hot air outlet 10 of the air outlet bin 8. The dried iron powder enters the air inlet bin 4 and is discharged through the discharge port 6 at the lower end.

[0034] Certainly, the above description is not limited to the above examples. The technical features not described in this utility model can be realized by or adopted from the prior art, and will not be elaborated here. The above embodiments and accompanying drawings are only used to illustrate the technical solution of this utility model and are not a limitation to this utility model. The detailed description of this utility model has been made with reference to the preferred embodiments. Those of ordinary skill in the art should understand that any changes, modifications, additions or substitutions made by those of ordinary skill in this technical field within the substantial scope of this utility model do not depart from the purpose of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. An iron powder drying system, comprising a drying tube (2) arranged transversely, characterized in that: It also comprises at least two swivel support mechanisms (1) arranged on the drying tube (2), the swivel support mechanism (1) comprising a fixed outer support ring (11) and an inner rotating ring (12) rotatably connected to the inner ring of the outer support ring (11), the inner rotating ring (12) being coaxially arranged with the drying tube (2), and a plurality of circumferentially evenly distributed connecting plates (14) being arranged between the inner rotating ring (12) and the drying tube (2), one end of the connecting plate (14) being tangentially connected to the outer ring of the drying tube (2), and the other end of the connecting plate (14) being hinged to the inner rotating ring (12).

2. The iron powder drying system according to claim 1, characterized in that: It also includes an air outlet bin (8) and an air inlet bin (4), the two ends of the drying tube (2) are respectively inserted into the air outlet bin (8) and the air inlet bin (4), and elastic sealing rings (7) are installed at the insertion holes, the upper and lower ends of the air inlet bin (4) are respectively provided with a hot air inlet (5) and a discharge port (6), the upper end of the air outlet bin (8) is provided with a hot air outlet (10), and it also includes a feed hopper (9) that penetrates into the air outlet bin (8), and the lower end of the feed hopper (9) extends into the drying tube (2).

3. The iron powder drying system according to claim 2, characterized in that: The cross section of the elastic sealing ring (7) is arc-shaped and the outer arc-shaped surface fits the drying tube (2).

4. The iron powder drying system according to claim 1, characterized in that: It also includes a driving mechanism for driving the drying tube (2) to rotate, the driving mechanism including a driving motor (18) and a gear ring (17) fixedly connected to the side of any one of the inner rotating rings (12), the driving motor (18) being provided with a gear (19) meshing with the gear ring (17).

5. The iron powder drying system according to claim 1, characterized in that: The inner ring of the outer support ring (11) is provided with an annular groove, and the inner rotating ring (12) is provided with a plurality of support wheels (13) located in the annular groove.

6. The iron powder drying system according to claim 1, characterized in that: The connecting plate (14) is a flat plate and has a hinged connection piece (15) fixedly connected to one end thereof; the hinged connection piece (15) is hingedly connected to the inner rotating ring (12).

7. The iron powder drying system according to claim 1, characterized in that: One end of the connecting plate (14) is tangentially connected to the outer ring of the drying tube (2) by means of bolts.

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