Dustproof dynamic sealing mechanism for powder drying and stirring and powder drying tank

Abstract

The utility model provides a dustproof dynamic sealing mechanism for powder drying and stirring, which comprises a flange mounting seat, a stirring paddle shaft rotatably connected with the flange mounting seat, and an anti-reverse spiral piece sleeved on the stirring paddle shaft, the upper part of the anti-reverse spiral piece extends to be embedded into the flange mounting seat, and the lower part of the anti-reverse spiral piece is fixedly connected with the flange mounting seat. The lower portion of the anti-reverse spiral piece extends towards the side direction to be provided with a plurality of powder blocking protruding parts. By additionally arranging the anti-reverse spiral piece, powder can be prevented from intruding into the sealing joint of the stirring paddle shaft and the flange mounting seat too early to the maximum extent, and the service life is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of powder drying and stirring equipment, in particular to a dust-proof dynamic sealing mechanism for powder drying and stirring and a powder drying tank. Background Technique

[0002] For some perfusion equipment, in order to increase the hardness and appearance performance of products, a certain proportion of powder needs to be mixed into the material. Due to problems such as large bulk density, easy moisture absorption, and dust generation of the powder. Before mixing the powder into other liquid materials, the powder needs to be put into a vacuum powder drying tank for stirring, iron impurity removal, drying and other pretreatment.

[0003] During the working process of the powder drying tank, the stirring paddle shaft plays a crucial role. It rotates rapidly to make the powder fully agitated and evenly stirred. However, during the actual operation, when the blades of the stirring paddle shaft rotate at high speed, an unignorable phenomenon will occur: it will drive the fine dust particles in the powder to move along the axial direction of the stirring paddle shaft. These tiny dust particles, like uninvited guests, will gradually erode the sealed connection between the powder drying tank and the stirring paddle shaft.

[0004] To solve this problem, the existing technology often only uses a general oil seal as an isolation measure. However, this traditional oil seal design is not ideal for isolating fine dust particles. Due to the tiny size of the dust particles and the limitations of the oil seal structure, the dust is easily able to penetrate the barrier of the oil seal and continue to damage the equipment. Therefore, there is an urgent need for a more effective and reliable sealing technology to solve this problem to ensure the long-term stable operation and production efficiency of the powder drying tank. Summary of the Utility Model

[0005] Aiming at the deficiencies in the prior art, the purpose of the present utility model is to propose a dust-proof dynamic sealing mechanism for powder drying and stirring to solve the problems mentioned in the above background technical part.

[0006] The present utility model is realized through the following technical solutions:

[0007] A dust-proof dynamic sealing mechanism for powder drying and stirring includes a flange mounting seat, a stirring paddle shaft rotatably connected to the flange mounting seat, and an anti-reverse spiral member sleeved on the stirring paddle shaft. The upper part of the anti-reverse spiral member extends to be embedded in the flange mounting seat, and the lower part of the anti-reverse spiral member extends laterally to be provided with a plurality of dust-blocking convex parts.

[0008] Further, the dust-blocking convex part has a threaded structure.

[0009] Further, it further includes a bearing, the bearing is sleeved on one end of the stirring paddle shaft facing the outside, and the stirring paddle shaft is rotatably connected to the flange mounting seat through the bearing.

[0010] Further, the bearing is a spherical roller bearing.

[0011] Further, the stirring paddle shaft is provided with a stepped portion for abutting against the anti-reverse spiral member.

[0012] Further, a plurality of first packing rings are sleeved on the upper part of the anti-reverse spiral member, and the flange mounting seat is provided with a first groove portion for accommodating the first packing rings.

[0013] Further, it further includes a bushing sleeved on the outer periphery of the stirring paddle shaft, a spacer sleeve is sleeved on the outer periphery of the bushing, and a first oil seal and a second oil seal are respectively provided at the upper and lower ends of the spacer sleeve.

[0014] Further, the flange mounting seat is provided with a first limiting surface for abutting against the bushing, and the upper end of the anti-reverse spiral member abuts against the bushing.

[0015] Further, a plurality of second packing rings are sleeved on the upper part of the stirring paddle shaft, and the flange mounting seat is provided with a second groove portion for accommodating the second packing rings.

[0016] On the other hand, the present invention provides a powder drying tank, including the dust-proof dynamic sealing mechanism described in any one of the above.

[0017] The beneficial effect of the present utility model is: a dust-proof dynamic sealing mechanism for powder drying and stirring, including a flange mounting seat, a stirring paddle shaft rotatably connected to the flange mounting seat, and an anti-reverse spiral member sleeved on the stirring paddle shaft. The upper part of the anti-reverse spiral member extends to be embedded in the flange mounting seat, and the lower part of the anti-reverse spiral member extends laterally to be provided with a plurality of powder-blocking convex portions. By adding the anti-reverse spiral member, it can prevent the powder from prematurely invading the sealing connection between the stirring paddle shaft and the flange mounting seat to the greatest extent, and greatly improves the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a middle sectional view of the present utility model.

[0019] Figure 2 It is a middle sectional view of another embodiment of the anti-reverse spiral member of the present utility model.

[0020] Among them, the above-mentioned drawings include the following reference numerals:

[0021] 1. Flange mounting seat; 11. First limiting surface; 2. Stirring paddle shaft; 21. Step portion; 22. Second packing; 3. Anti-back spiral member; 31. Powder-blocking convex portion; 32. First packing; 4. Bearing; 5. Bush; 6. Spacer sleeve; 7. First oil seal; 8. Second oil seal. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It should be noted here that the descriptions of these embodiments are used to help understand the present utility model, but do not constitute a limitation to the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0023] Refer to Figures 1 to 2 As shown, a dust-proof dynamic sealing mechanism for powder drying and stirring includes a flange mounting seat 1, a stirring paddle shaft 2 rotatably connected to the flange mounting seat 1, and an anti-back spiral member 3 sleeved on the stirring paddle shaft 2. The upper part of the anti-back spiral member 3 extends to be embedded in the flange mounting seat 1, and several powder-blocking convex portions 31 are arranged laterally at the lower part of the anti-back spiral member 3.

[0024] Among them, the upper part of the anti-back spiral member 3 refers to: after the dust-proof dynamic sealing mechanism is installed on the powder drying tank, the part of the anti-back spiral member 3 that is farther from the inner side of the tank is the upper part. The lower part of the anti-back spiral member 3 refers to: after the dust-proof dynamic sealing mechanism is installed on the powder drying tank, the part of the anti-back spiral member 3 that is closer to the inner side of the tank is the lower part.

[0025] By adding the anti-back spiral member 3 in the present utility model, the fine dust particles in the powder move along the axial direction of the stirring paddle shaft 2 and will then be blocked by the powder-blocking convex portions 31, avoiding erosion of the sealed connection between the powder drying tank and the stirring paddle shaft 2 (or the connection between the flange mounting seat 1 and the stirring paddle shaft 2). Thus, it can prevent the powder from prematurely invading the sealed connection between the stirring paddle shaft 2 and the flange mounting seat 1 to the greatest extent, greatly improving the service life.

[0026] The powder-blocking convex portions 31 are in a threaded structure, and the threaded structure is convenient for processing and forming, and can play a role in blocking the powder in multiple layers.

[0027] Refer to Figure 2 As shown, in other embodiments, the powder-blocking convex portions 31 can also be a plurality of annular structures arranged linearly in the axial direction.

[0028] It also includes a bearing 4 sleeved on one end of the stirring paddle shaft 2 facing the outside, and the stirring paddle shaft 2 is rotatably connected to the flange mounting seat 1 through the bearing 4. By designing the bearing 4 on the outermost side, which is maximally away from the powder position, the service life of the bearing 4 can be greatly improved.

[0029] The bearing 4 is a self-aligning roller bearing 4. The self-aligning roller bearing 4 is a high-performance type of bearing 4. It has the ability to automatically adjust the alignment error of the shaft. By replacing the deep groove ball bearing 4 in the prior art with a self-aligning roller bearing 4, not only can the manufacturing difficulty be reduced, but also greater flexibility can be provided in the alignment adjustment of mechanical components, thereby ensuring the long-term stable operation of the mechanical equipment while improving production efficiency.

[0030] The stirring paddle shaft 2 is provided with a stepped portion 21 for supporting the anti-reverse spiral member 3. Through the design of the stepped portion 21, the position of the anti-reverse spiral member 3 is kept fixed.

[0031] It also includes a shaft sleeve 5 sleeved on the outer periphery of the stirring paddle shaft 2. An isolating sleeve 6 is sleeved on the outer periphery of the shaft sleeve 5. A first oil seal 7 and a second oil seal 8 are respectively provided at the upper and lower ends of the isolating sleeve 6. Through this structure, the stirring paddle shaft 2 can rotate stably and smoothly with the flange mounting seat 1.

[0032] A number of first packing rings 32 are sleeved on the upper part of the anti-reverse spiral member 3, and the flange mounting seat 1 is provided with a first groove portion for accommodating the first packing ring 32. Through the design of the first packing ring 32 and the first groove, it can further prevent the powder from eroding the connection between the stirring paddle shaft 2, the shaft sleeve 5, the isolating sleeve 6 and the flange mounting seat 1.

[0033] A number of second packing rings 22 are sleeved on the upper part of the stirring paddle shaft 2, and the flange mounting seat 1 is provided with a second groove portion for accommodating the second packing ring 22. Through the design of the second packing ring 22 and the second groove, it can further prevent the powder from eroding the connection between the bearing 4, the stirring paddle shaft 2 and the flange mounting seat 1.

[0034] The flange mounting seat 1 is provided with a first limiting surface 11 for abutting against the shaft sleeve 5. The upper end of the anti-reverse spiral member 3 abuts against the shaft sleeve 5, and the upper end of the shaft sleeve 5 abuts against the first limiting surface 11.

[0035] During assembly, in sequence according to the direction, the first oil seal 7, the isolating sleeve 6, the second oil seal 8, the two first packing rings 32, the shaft sleeve 5 and the anti-reverse spiral member 3 are inserted into the flange mounting seat 1 from the inside to the outside (i.e., the powder movement direction) and abut against the first limiting surface 11. Then the second packing ring 22, the bearing 4 and the outer oil seal structure (not shown in the figure) are installed. Finally, the whole set is sleeved on the stirring paddle shaft 2, and the lower end of the anti-reverse spiral member 3 is supported by the stepped portion 21.

[0036] On the other hand, the present invention provides a powder drying tank, including the dust-proof dynamic sealing mechanism of any one of the above. The beneficial effects of a powder drying tank are generated according to the dust-proof dynamic sealing mechanism, which will not be elaborated here. The flange mounting seat 1 can be an integrally formed structure with the powder drying tank. In other embodiments, the flange mounting seat 1 can be assembled by sealing a plurality of plate members.

[0037] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0038] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A dustproof dynamic sealing mechanism for powder drying and stirring, characterized in that: The invention comprises a flange mounting seat (1), a stirring paddle shaft (2) rotatably connected to the flange mounting seat (1), and an anti-reverse spiral component (3) sleeved on the stirring paddle shaft (2), wherein the upper portion of the anti-reverse spiral component (3) extends to be embedded in the flange mounting seat (1), and the lower portion of the anti-reverse spiral component (3) is provided with a plurality of powder blocking protrusions (31) extending laterally.

2. The dust-proof dynamic sealing mechanism for powder drying and stirring according to claim 1, characterized in that: The powder blocking protrusion (31) is in a threaded structure.

3. The dust-proof dynamic sealing mechanism for powder drying and stirring according to claim 1 is characterized in that: It also comprises a bearing (4), wherein the bearing (4) is sleeved on one end of the stirring paddle shaft (2) facing outward, and the stirring paddle shaft (2) is rotatably connected to the flange mounting seat (1) via the bearing (4).

4. The dust-proof dynamic sealing mechanism for powder drying and stirring according to claim 3 is characterized in that: The bearing (4) is a spherical roller bearing (4).

5. The dust-proof dynamic sealing mechanism for powder drying and stirring according to claim 1, characterized in that: The stirring paddle shaft (2) is provided with a step portion (21) for supporting the anti-reverse spiral component (3).

6. The dust-proof dynamic sealing mechanism for powder drying and stirring according to claim 1, characterized in that: The upper part of the anti-reverse spiral component (3) is sleeved with a plurality of first packings (32), and the flange mounting seat (1) is provided with a first groove portion for accommodating the first packings (32).

7. The dust-proof dynamic sealing mechanism for powder drying and stirring according to claim 1, characterized in that: It also comprises a shaft sleeve (5) sleeved on the outer circumference of the stirring paddle shaft (2), the outer circumference of the shaft sleeve (5) is sleeved with a spacer sleeve (6), and the upper and lower ends of the spacer sleeve (6) are respectively provided with a first oil seal (7) and a second oil seal (8).

8. The dust-proof dynamic sealing mechanism for powder drying and stirring according to claim 7, characterized in that: The flange mounting seat (1) is provided with a first limiting surface (11) abutting against the shaft sleeve (5), and the upper end of the anti-reverse spiral component (3) supports the shaft sleeve (5).

9. A dust-proof dynamic sealing mechanism for powder drying and stirring according to any one of claims 1 to 8, characterized in that: A plurality of second packings (22) are sleeved on the upper portion of the stirring paddle shaft (2), and the flange mounting seat (1) is provided with a second groove portion for accommodating the second packings (22).

10. A powder drying tank, characterized in that: It comprises the dustproof dynamic sealing mechanism as claimed in any one of claims 1 to 9.

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