Powder pre-drying device
By installing movable bearings and floating mounting components on the mixing shaft and hopper, the problem of equipment deformation caused by thermal expansion and contraction is solved, thus extending the service life of the equipment.
Patent Information
- Application Number
- CN202521694257.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-11
- Publication Date
- 2026-07-07
- Estimated Expiration
- 2035-08-11
AI Technical Summary
In existing pre-dryers, the mixing shaft and hopper are prone to axial expansion and contraction deformation during thermal expansion and contraction, which affects the service life of the equipment.
A first bearing and a second bearing are fitted at both ends of the stirring shaft, and the first bearing is able to move relative to the frame along the axial direction of the stirring shaft. The axial deformation of the stirring shaft is automatically compensated by the movement of the bearing, and the hopper compensates for the length deformation by a floating mounting assembly.
This effectively avoids damage to the equipment caused by thermal expansion and contraction, thus extending the equipment's service life.
Smart Images
Figure CN224470662U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drying equipment technology, and in particular to a powder pre-drying device. Background Technology
[0002] A pre-dryer is a device used for the preliminary drying of materials, often for pre-drying powders. In related technologies, a pre-dryer consists of a hopper, a heat source, and a stirring shaft. The heat source enters the inner cavity of the hopper along with the material. The stirring shaft is equipped with large stirring blades that agitate the material within the hopper, thereby reducing the moisture content and completing the pre-drying process.
[0003] Regarding the aforementioned technologies, the mixing shaft and hopper are prone to axial expansion and contraction deformation due to thermal expansion and contraction during operation, which affects the service life of the equipment. Utility Model Content
[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a powder pre-drying device that can automatically compensate for the axial deformation of the stirring shaft caused by thermal expansion and contraction, thereby improving the service life of the equipment.
[0005] The powder pre-drying device according to an embodiment of the present invention includes:
[0006] frame;
[0007] A hopper connected to the frame;
[0008] A stirring shaft is provided, which passes through the hopper along a first direction. A first bearing and a second bearing are respectively fitted at both ends of the stirring shaft. Both the first bearing and the second bearing are connected to the frame to rotatably mount the stirring shaft on the frame. The first bearing is movable relative to the frame along the first direction.
[0009] The powder pre-drying apparatus according to the embodiments of the present invention has at least the following beneficial effects:
[0010] By installing a first bearing and a second bearing at each end of the stirring shaft, the stirring shaft is rotatably mounted on the frame. The first bearing can move relative to the frame in a first direction (i.e., the axial direction of the stirring shaft). When the stirring shaft undergoes axial expansion and contraction due to thermal expansion and contraction, the movement of the first bearing relative to the frame can automatically compensate for the axial deformation of the stirring shaft, thus avoiding equipment damage and improving the service life of the equipment.
[0011] According to some embodiments of the present invention, a first bearing seat is provided on the frame, the first bearing seat is provided with a mounting hole extending through along the first direction, the first bearing is installed in the mounting hole and can slide relative to the first bearing seat along the axial direction of the mounting hole.
[0012] According to some embodiments of the present invention, the first bearing housing is detachably connected to bearing end caps at both ends of the mounting hole, and the distance between the bearing end caps at both ends of the mounting hole is greater than the axial dimension of the first bearing.
[0013] According to some embodiments of the present invention, the powder pre-drying device further includes:
[0014] The mounting assembly includes a first mounting part and a second mounting part, wherein the first mounting part is movably disposed on the frame along the first direction, and the second mounting part is fixedly connected to the frame;
[0015] The two ends of the hopper are fixedly connected to the first mounting part and the second mounting part, respectively.
[0016] According to some embodiments of the present invention, the first mounting portion is provided with a guide groove extending along the first direction on the side facing the frame, and the frame is provided with a guide portion extending along the first direction, the guide portion being embedded in the guide groove.
[0017] According to some embodiments of the present invention, the first mounting part is supported on the frame, and the frame is provided with a first limiting part. The first limiting part abuts against the side of the first mounting part away from the frame along a second direction, so as to restrict the movement of the first mounting part relative to the frame along the second direction. The second direction is parallel to the depth direction of the guide groove.
[0018] According to some embodiments of the present invention, the first limiting part is configured as a first limiting screw, and the first limiting screw is threadedly installed on the frame.
[0019] According to some embodiments of the present invention, the frame is provided with the first limiting part on each of the opposite sides of the first mounting part along the third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.
[0020] According to some embodiments of the present invention, the hopper is provided with a plurality of supports at intervals along the first direction, and the frame is provided with a second limiting part corresponding to the supports, the second limiting part abutting against the side of the support away from the frame along the second direction.
[0021] According to some embodiments of the present invention, the powder pre-drying device further includes:
[0022] A drive mechanism is mounted on the frame and connected to the end of the stirring shaft away from the first bearing to drive the stirring shaft to rotate.
[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:
[0025] Figure 1 This is a schematic diagram of the external structure of the powder pre-drying device according to an embodiment of the present invention;
[0026] Figure 2 This is a schematic diagram of the internal structure of the powder pre-drying device according to an embodiment of the present invention;
[0027] Figure 3 This is a schematic diagram of the installation structure of the first limiting part and the second limiting part according to an embodiment of the present utility model.
[0028] Icon labels:
[0029] Frame 100, first bearing housing 110, mounting hole 111, bearing end cover 112, guide part 120, first limiting part 130, second limiting part 140, second bearing housing 150, first U-shaped seat 160, second U-shaped seat 170;
[0030] 200 hopper, 210 support;
[0031] Stirring shaft 300, first bearing 310, second bearing 320;
[0032] First mounting part 400, guide groove 401;
[0033] Second installation unit 500;
[0034] Drive mechanism 600. Detailed Implementation
[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0036] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0037] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.
[0038] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0039] Reference Figures 1 to 3 As shown, a powder pre-drying device according to an embodiment of the present invention includes: a frame 100, a hopper 200 and a stirring shaft 300.
[0040] The frame 100 is used to provide a mounting and support carrier for the various components.
[0041] The hopper 200 is connected to the frame 100. The hopper 200 is equipped with a feed inlet and a discharge outlet. The feed inlet is connected to both the powder channel and the hot air channel. That is, the powder and hot air enter the hopper 200 together from the feed inlet. This is a standard setting, so it will not be described in detail here.
[0042] A stirring shaft 300 is inserted into a hopper 200 along a first direction, which is the axial direction of the stirring shaft 300 and the length direction of the hopper 200. The stirring shaft 300 is equipped with stirring blades to stir the powder within the hopper 200. A first bearing 310 and a second bearing 320 are respectively fitted at both ends of the stirring shaft 300; the first bearing 310 is fitted at one end of the stirring shaft 300, and the second bearing 320 is fitted at the other end. Both the first bearing 310 and the second bearing 320 are located outside the hopper 200 and are connected to a frame 100 to rotatably mount the stirring shaft 300 onto the frame 100. The first bearing 310 is movable relative to the frame 100 along the first direction. It should be noted that this "movement" refers to the ability of the first bearing 310 to move relative to the frame 100 along the first direction when the stirring shaft 300 undergoes axial deformation due to thermal expansion and contraction.
[0043] The powder pre-drying device of this utility model, by respectively sleeved a first bearing 310 and a second bearing 320 at both ends of the stirring shaft 300, rotatably mounts the stirring shaft 300 to the frame 100, and allows the first bearing 310 to move relative to the frame 100 in a first direction (i.e., the axial direction of the stirring shaft 300). Thus, when the stirring shaft 300 undergoes axial expansion and contraction due to thermal expansion and contraction, the movement of the first bearing 310 relative to the frame 100 can automatically compensate for the axial deformation of the stirring shaft 300, avoid equipment damage, and improve the service life of the equipment.
[0044] Reference Figure 1 and Figure 2 As shown, in some embodiments of this utility model, a first bearing seat 110 is fixedly provided on the frame 100. The first bearing seat 110 is provided with a mounting hole 111 extending along a first direction. The first bearing 310 is installed in the mounting hole 111 and can slide relative to the first bearing seat 110 along the axial direction of the mounting hole 111, thereby enabling the first bearing 310 to move relative to the frame 100 along the first direction. The structure is simple and practical.
[0045] It is understood that in some embodiments, the first bearing 310, the second bearing 320, and the stirring shaft 300 are fixed relative to each other along the axial direction (first direction) of the stirring shaft 300.
[0046] Reference Figure 2 As shown, in some embodiments of this utility model, the first bearing housing 110 is detachably connected to bearing end caps 112 at both ends of the mounting hole 111 to reduce the corrosion of the first bearing 310 by the external environment; wherein, along the first direction, the distance between the bearing end caps 112 at both ends of the mounting hole 111 is greater than the axial dimension of the first bearing 310, so as to leave a gap for the first bearing 310 to slide.
[0047] It is understood that in some embodiments, a second bearing housing 150 is also fixedly disposed on the frame 100. The second bearing housing 150 is used to install the second bearing 320, and the second bearing 320 and the second bearing housing 150 are fixed relative to each other along the first direction. Obviously, the second bearing housing 150 is also provided with corresponding holes for installing the second bearing 320 and end caps for sealing.
[0048] Reference Figure 1 and Figure 2As shown, in some embodiments of this utility model, the powder pre-drying device further includes an installation assembly. The installation assembly includes a first installation part 400 and a second installation part 500. The first installation part 400 is movably disposed on the frame 100 along a first direction, and the second installation part 500 is fixedly connected to the frame 100. The two ends of the hopper 200 are respectively fixedly connected to the first installation part 400 and the second installation part 500. It is understood that the hopper 200 is usually quite long and prone to thermal expansion and contraction during prolonged operation. Therefore, in this embodiment, by fixing the second installation part 500 and floating the first installation part 400, and connecting the hopper 200 between the first installation part 400 and the second installation part 500, the deformation of the hopper 200 in the first direction (i.e., the length direction of the hopper 200) can be automatically compensated by the movement of the first installation part 400 in the first direction when the hopper 200 expands and contracts due to heat, further improving the service life of the equipment.
[0049] Reference Figure 2 As shown, in some embodiments of this utility model, the first mounting part 400 is provided with a guide groove 401 extending along a first direction on the side facing the frame 100. Both ends of the guide groove 401 in the width direction are closed ends. A guide part 120 extending along the first direction is provided on the frame 100. The guide part 120 is embedded in the guide groove 401, so that the first mounting part 400 can slide relative to the frame 100 along the first direction. The structure is simple and practical. It is conceivable that the cooperation between the guide part 120 and the guide groove 401 can not only provide movement guidance for the first mounting part 400, but also play a role in quick positioning when installing the first mounting part 400.
[0050] In some specific embodiments, the first direction is perpendicular to the vertical direction, the first mounting part 400 is located on the upper side of the frame 100, and the guide groove 401 is disposed at the bottom of the first mounting part 400.
[0051] In some specific embodiments, the frame 100 is provided with a groove extending in a first direction, and the guide portion 120 is embedded in the groove.
[0052] It is understood that the first mounting part 400 and the second mounting part 500 can be a frame structure or a structure of other shapes, and this embodiment does not limit this.
[0053] Reference Figures 1 to 3As shown, in some embodiments of this utility model, the first mounting part 400 is supported on the frame 100, and the frame 100 is provided with a first limiting part 130. The first limiting part 130 abuts against the side of the first mounting part 400 away from the frame 100 along the second direction, so as to restrict the movement of the first mounting part 400 relative to the frame 100 along the second direction. The second direction is parallel to the depth direction of the guide groove 401. By providing the first limiting part 130, the first mounting part 400 can be prevented from moving in the second direction.
[0054] It is conceivable that the first mounting part 400 is provided with a plane for abutting against the first limiting part 130, the plane being parallel to the first direction, so as to prevent the first limiting part 130 from blocking the movement of the first mounting part 400 in the first direction.
[0055] In some specific embodiments, the second direction is the vertical direction.
[0056] Reference Figure 3 As shown, in some embodiments of this utility model, the first limiting part 130 is configured as a first limiting screw, which is threaded onto the frame 100. The length direction of the first limiting screw is parallel to the second direction. By setting the first limiting screw, the contact force between the first limiting screw and the first mounting part 400 can be flexibly adjusted by turning the first limiting screw, so that the first limiting screw can stably limit the first mounting part 400 to prevent it from moving, and will not cause the first mounting part 400 to be unable to slide relative to the frame 100 along the first direction.
[0057] In some specific embodiments, a first U-shaped seat 160 is fixed on the frame 100 by fasteners, and a first limiting screw is installed on the first U-shaped seat 160.
[0058] In some embodiments of this utility model, the frame 100 is provided with first limiting parts 130 on opposite sides of the first mounting part 400 along the third direction. The first direction, the second direction, and the third direction are perpendicular to each other. This arrangement can improve the limiting effect on the first mounting part 400 and improve reliability.
[0059] Reference Figure 1 and Figure 3As shown, in some embodiments of this utility model, the hopper 200 is provided with a plurality of supports 210 spaced apart along the first direction. The supports 210 are fixed to the hopper 200, and a second limiting part 140 is provided on the frame 100 corresponding to each support 210. The second limiting part 140 abuts against the side of the support 210 away from the frame 100 along the second direction. In this embodiment, by providing supports 210 and second limiting parts 140, the displacement of the hopper 200 relative to the frame 100 along the second direction is restricted at multiple positions in the first direction, thereby improving the limiting effect. It is conceivable that the hopper 200 is relatively long. If only the first limiting part 130 is used to limit the first mounting part 400 and thus limit the hopper 200, the middle position of the hopper 200 in the length direction may still experience movement in the second direction. Therefore, this embodiment provides supports 210 and second limiting parts 140 to improve the limiting effect on the hopper 200.
[0060] In some specific embodiments, refer to Figure 3 As shown, a second U-shaped seat 170 is fixed to the frame 100 by fasteners. A second limiting part 140 is configured as a second limiting screw and installed on the second U-shaped seat 170. The length direction of the second limiting screw is parallel to the second direction. Similarly, by setting the second limiting screw, the contact force between the second limiting screw and the support 210 can be flexibly adjusted by turning the second limiting screw, so that the second limiting screw can stably limit the support 210 to prevent it from moving, and will not prevent the support 210 from being unable to move relative to the frame 100 in the first direction.
[0061] Understandably, the frame 100 is provided with second limiting parts 140 on opposite sides of the hopper 200 along a third direction.
[0062] Reference Figure 1 and Figure 2 As shown, in some embodiments of this utility model, the powder pre-drying device further includes a drive mechanism 600. The drive mechanism 600 is mounted on the frame 100 and connected to the end of the stirring shaft 300 away from the first bearing 310 to drive the stirring shaft 300 to rotate. In this embodiment, by connecting the drive mechanism 600 to the end of the stirring shaft 300 away from the first bearing 310, the stability of power transmission can be ensured. Since the first bearing 310 allows axial floating, the thermal expansion and contraction deformation of the stirring shaft 300 is mainly released to the non-drive side, which can avoid the additional load generated by the drive mechanism 600 due to axial displacement, thereby reducing the impact of thermal stress on the drive mechanism 600 and improving the service life of the equipment.
[0063] Additionally, it should be noted that in this embodiment, there are two stirring shafts 300, and the drive mechanism 600 is connected to one of the stirring shafts 300. The two stirring shafts 300 are connected by a gear assembly on the side near the first bearing 310. The drive mechanism 600 can adopt a combination structure of motor plus sprocket and chain. The above structures are all conventional settings, and this utility model has not made any improvements to them, so they will not be described in detail here.
[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine different embodiments or examples described in this specification.
[0065] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A powder pre-drying device, characterized in that, include: frame; A hopper, which is connected to the frame; A stirring shaft is provided, which passes through the hopper along a first direction. A first bearing and a second bearing are respectively fitted at both ends of the stirring shaft. Both the first bearing and the second bearing are connected to the frame to rotatably mount the stirring shaft on the frame. The first bearing is movable relative to the frame along the first direction.
2. The powder pre-drying device according to claim 1, characterized in that, The frame is provided with a first bearing housing, the first bearing housing is provided with a mounting hole extending through along the first direction, the first bearing is installed in the mounting hole and can slide relative to the first bearing housing along the axial direction of the mounting hole.
3. The powder pre-drying device according to claim 2, characterized in that, The first bearing housing is detachably connected to bearing end caps at both ends of the mounting hole, and the distance between the bearing end caps at both ends of the mounting hole is greater than the axial dimension of the first bearing.
4. The powder pre-drying device according to claim 1, characterized in that, The powder pre-drying device also includes: The mounting assembly includes a first mounting part and a second mounting part, wherein the first mounting part is movably disposed on the frame along the first direction, and the second mounting part is fixedly connected to the frame; The two ends of the hopper are fixedly connected to the first mounting part and the second mounting part, respectively.
5. The powder pre-drying device according to claim 4, characterized in that, The first mounting portion is provided with a guide groove extending along the first direction on the side facing the frame, and the frame is provided with a guide portion extending along the first direction, the guide portion being embedded in the guide groove.
6. The powder pre-drying device according to claim 5, characterized in that, The first mounting part is supported on the frame, and the frame is provided with a first limiting part. The first limiting part abuts against the side of the first mounting part away from the frame along a second direction, so as to restrict the movement of the first mounting part relative to the frame along the second direction. The second direction is parallel to the depth direction of the guide groove.
7. The powder pre-drying device according to claim 6, characterized in that, The first limiting part is configured as a first limiting screw, which is threaded onto the frame.
8. The powder pre-drying device according to claim 6, characterized in that, The frame is provided with the first limiting part on each of the opposite sides of the first mounting part along the third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.
9. The powder pre-drying device according to claim 6, characterized in that, The hopper is provided with a plurality of supports spaced apart along the first direction, and the frame is provided with a second limiting part corresponding to the supports. The second limiting part abuts against the side of the support away from the frame along the second direction.
10. The powder pre-drying device according to claim 1, characterized in that, The powder pre-drying device also includes: A drive mechanism is mounted on the frame and connected to the end of the stirring shaft away from the first bearing to drive the stirring shaft to rotate.