Dust collecting device and mixing device

Abstract

A dust collecting device (100) and a mixing device. The dust collecting device (100) is provided with a collecting portion (10), an connector portion (20), and a mounting portion (30); the dust collecting device (100) is mounted on a container (200) by means of the mounting portion (30); the collecting portion (10) is located in the container (200); and the connector portion (20) is communicated with the collecting portion (10) and is located outside the container (200). When the dust collecting device works, the connector portion (20) provides suction air, and the collecting portion can collect the dust in the container (200).

Description

Dust collection device and mixing equipment

[0001] Related applications

[0002] This application claims priority to Chinese patent application filed on June 21, 2024, with application number 202410814897.5, entitled "Dust Collection Device and Mixing Equipment", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of cleaning equipment technology, and in particular to a dust collection device and a mixing device. Background Technology

[0004] Mortar and cement are typically made by mixing powdered compounds with sufficient water, usually in a container such as a five-gallon bucket. In practice, the powdered compound is first poured into the container, and then water is added and stirred. The process of pouring the powdered compound into the container and adding water generates a significant amount of dust, which can seriously affect the health of operators if inhaled. Summary of the Invention

[0005] According to various embodiments of this application, a dust collection device and a mixing device are provided.

[0006] A dust collection device is provided, comprising a collection section, an interface section, and an installation section. The dust collection device is installed on a container via the installation section, the collection section is located inside the container, and the interface section is connected to the collection section and located outside the container. When a suction force is provided at the interface section, the collection section can collect the dust inside the container.

[0007] In one embodiment, the mounting portion is formed with a slot for engaging with the opening edge of the container.

[0008] In one embodiment, the mounting part includes a first limiting member and a second limiting member. The first limiting member is connected to the collecting part, and the second limiting member is connected to the interface part. Along the first direction X, the first limiting member and the second limiting member are spaced apart, and a slot is formed between the first limiting member, the second limiting member and the outer wall of the interface part.

[0009] In one embodiment, the second limiting member has a support structure disposed toward the first limiting member, the support structure being used to support the lower surface of the outer peripheral structure of the container along a second direction Y, wherein the second direction Y is perpendicular to the first direction X.

[0010] In one embodiment, the second limiting member further has an abutment structure disposed toward the first limiting member, the abutment structure being used to abut against the outer periphery of the container along the first direction X.

[0011] In one embodiment, along the second direction Y, the abutment structure is located above the supporting structure and extends in an arc shape to adapt to the outer periphery of the container. Alternatively, along the second direction Y, the abutment structure is located below the supporting structure and extends in an elongated shape along the second direction. In one embodiment, the second limiting member has a reinforcing structure on the side opposite to the first limiting member, and the reinforcing structure is set at an angle to the second limiting member.

[0012] In one embodiment, the collection section extends circumferentially along the container, the inner side of the collection section is used to guide dust from inside the container into the interface section, and the outer side of the collection section has a fitting surface for fitting the inner circumferential wall of the container.

[0013] In one embodiment, the outer wall of the collecting part is further provided with a third limiting member. Along the second direction Y, the third limiting member is located above the contact surface, and when the contact surface is in contact with the inner peripheral wall of the container, the third limiting member is pressed against the opening edge of the container.

[0014] In one embodiment, the collecting part includes a first wall and a second wall, with a contact surface disposed on the first wall. Along the second direction Y, the second wall is connected above the first wall, and along the first direction X, the second wall moves toward the direction close to the central axis of the container.

[0015] In one embodiment, the first wall is configured as a semi-annular wall, and the outer surface of the semi-annular wall forms a mating surface.

[0016] In one embodiment, the outer surface of the first wall is provided with a plurality of fourth limiting members, which are distributed at intervals along the inner peripheral wall of the container, and each fourth limiting member is provided with a sub-adhesive surface for adhering to the inner peripheral wall of the container.

[0017] In one embodiment, the angle between the second wall and the plane containing the container opening is β, and 50°≤β≤60°.

[0018] In one embodiment, the angle formed by the lines connecting the two ends of the collecting portion to its central axis along the extending direction of the collecting portion is α, and 140°≤α≤155°. In one embodiment, the interface portion includes a plurality of interconnected connecting segments, the inner diameter of which gradually increases along the direction from near the collecting portion to far away from the collecting portion, so that a limiting step is formed at the connection between two adjacent connecting segments.

[0019] This application also provides a mixing device, which includes a container and the dust collection device described in any of the above embodiments.

[0020] Compared with related technologies, the dust collection device provided in this application, when a suction force is provided at the interface, the collection section can generate a suction force towards the interface, thereby drawing the dust inside the container through the collection section and the interface and discharging it outside the container. Furthermore, by installing the dust collection device onto the container via the mounting section, the operator does not need to hold the dust collection device when performing dust collection operations on the container, making operation more convenient and labor-saving.

[0021] Details of one or more embodiments of this application are set forth in the following drawings and description. Other features, objects, and advantages of this application will become apparent from the specification, drawings, and claims. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 is a schematic diagram of the assembly of the dust collection device and container in Embodiment 1 provided in this application.

[0024] Figure 2 is a schematic diagram from another perspective of Figure 1.

[0025] Figure 3 is a side view of the dust collection device in Embodiment 1 provided in this application.

[0026] Figure 4 is a rear view of the dust collection device in Embodiment 1 provided in this application.

[0027] Figure 5 is a schematic diagram of the assembly of the dust collection device and container in Embodiment 2 provided in this application.

[0028] Figure 6 is a side view of the dust collection device in Embodiment 2 provided in this application.

[0029] Figure 7 is a schematic diagram of the dust collection device of Embodiment 3 provided in this application.

[0030] Figure 8 is a side view of the dust collection device in Embodiment 3 provided in this application.

[0031] Figure 9 is a top view of the dust collection device in Embodiment 3 provided in this application.

[0032] Figure 10 is a cross-sectional view of Figure 9 at point AA.

[0033] Reference numerals: 100, dust collection device; 10, collection section; 11, third limiting member; 12, mating surface; 13, first wall; 131, fourth limiting member; 132, sub-matting surface; 14, second wall; 20, interface section; 21, connecting section; 22, limiting step; 30, mounting section; 31, slot; 32, first limiting member; 33, second limiting member; 331, load-bearing structure; 332, abutment structure; 333, reinforcing structure; 200, container; 201, barrel; 210, limiting ring. Detailed Implementation

[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0035] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0039] Please refer to Figures 1 to 4. This application provides a dust collection device 100. Figure 1 is a schematic diagram of the assembly of the dust collection device and the container in Embodiment 1 of this application; Figure 2 is a schematic diagram from another perspective of Figure 1; Figure 3 is a side view of the dust collection device in Embodiment 1 of this application; and Figure 4 is a rear view of the dust collection device in Embodiment 1 of this application.

[0040] Specifically, the dust collection device 100 includes a collection section 10, an interface section 20, and a mounting section 30. The dust collection device 100 is mounted to the container 200 via the mounting section 30. The collection section 10 is located inside the container 200, and the interface section 20 connects to the collection section 10 and is located outside the container 200. When suction power is provided at the interface section 20, the collection section 10 can collect the dust inside the container 200. It is understood that when suction power is provided at the interface section 20, the collection section 10 can generate suction power towards the interface section 20, thereby drawing the dust inside the container 200 out of the container 200 via the collection section 10 and the interface section 20. Furthermore, by mounting the dust collection device 100 to the container 200 via the mounting section 30, the operator does not need to hold the dust collection device 100 during vacuuming operations, making operation more convenient and labor-saving.

[0041] The interface 20 can be connected to a vacuum cleaner or other suction device to provide suction power at the interface 20. The container 200 includes, but is not limited to, a five-gallon bucket. The following description uses a five-gallon bucket 201 as an example to introduce the specific structure of the dust collection device 100 and how it is used in conjunction with the container 200.

[0042] The mounting part 30 is located at the junction of the collecting part 10 and the interface part 20, and the mounting part 30 is used to connect to the opening edge of the five-gallon bucket 201. Thus, when the mounting part 30 is connected to the opening edge of the five-gallon bucket 201, the collecting part 10 is located inside the five-gallon bucket 201, and the interface part 20 is located outside the five-gallon bucket 201.

[0043] Furthermore, the mounting part 30 is detachably connected to the opening edge of the five-gallon bucket 201.

[0044] Optionally, as shown in Figure 3, the mounting part 30 is provided with a slot 31 for engaging with the opening edge of the five-gallon container 201. Alternatively, the mounting part 30 can also be connected to the opening edge of the five-gallon container 201 using fasteners such as bolts.

[0045] In one embodiment, the mounting portion 30 includes a first limiting member 32 and a second limiting member 33. The first limiting member 32 is connected to the collecting portion 10, and the second limiting member 33 is connected to the interface portion 20. The first limiting member 32 and the second limiting member 33 are spaced apart along a first direction X, and a groove 31 is formed between the first limiting member 32, the second limiting member 33, and the outer wall of the interface portion 20. Here, the first direction X refers to the radial direction of the five-gallon container 201. Thus, when the opening edge of the five-gallon container 201 is engaged in the groove 31, the outer wall of the interface portion 20 presses against the upper surface of the opening edge of the five-gallon container 201, and the first limiting member 32 and the second limiting member 33 cooperate to restrict the dust collection device 100 from swaying left and right relative to the five-gallon container 201 along its radial direction.

[0046] The second limiting member 33 has a bearing structure 331 disposed toward the first limiting member 32. The bearing structure 331 is used to support the outer periphery of the five-gallon bucket 201 along the second direction Y, wherein the second direction Y is perpendicular to the first direction X.

[0047] Specifically, the outer peripheral structure refers to the fact that the outer peripheral wall of the five-gallon container 201 near the opening is provided with a plurality of limiting rings 210 spaced apart along the second direction Y. Specifically, the second direction Y refers to the axial direction of the five-gallon container 201, and the supporting structure 331 is used to support the lower surface of the limiting rings 210 along the second direction Y. It is understood that by having the supporting structure 331 support the lower surface of the limiting rings 210 along the second direction Y, the dust collection device 100 can be prevented from detaching upwards from the five-gallon container 201 along its axial direction.

[0048] The second limiting member 33 also has an abutment structure 332 disposed toward the first limiting member 32, the abutment structure 332 being used to abut against the outer periphery of the five-gallon barrel 201 along the first direction X.

[0049] Specifically, the abutment structure 332 is used to abut against the side wall of the limiting ring 210 along the first direction X. This helps to further limit the dust collection device 100 from side to side relative to the five-gallon bucket 201 along the radial direction of the five-gallon bucket 201.

[0050] Along the second direction Y, the abutment structure 332 and the supporting structure 331 are distributed at intervals, and the distance between the abutment structure 332 and the first limiting member 32 is smaller than the distance between the supporting structure 331 and the first limiting member 32. Specifically, the arrangement of the abutment structure 332 and the supporting structure 331 can be in the following two forms.

[0051] Example 1

[0052] As shown in Figures 1 to 4, along the second direction Y, the abutment structure 332 is located above the support structure 331, and the abutment structure 332 extends in an arc shape to fit the side wall of the limiting ring 210. The abutment structure 332 and the support structure 331 are engaged with the same limiting ring 210 at the edge of the opening of the five-gallon bucket 201. This increases the contact area between the abutment structure 332 and the limiting ring 210, and makes the abutment structure 332 and the support structure 331 more compactly distributed.

[0053] Example 2

[0054] Please refer to Figures 5 and 6, where Figure 5 is a schematic diagram of the assembly of the dust collection device and container in Embodiment 2 provided by this application; and Figure 6 is a side view of the dust collection device in Embodiment 2 provided by this application.

[0055] Along the second direction Y, the abutment structure 332 is located below the support structure 331, and the abutment structure 332 extends in an elongated shape along the second direction Y. Specifically, the support structure 331 is used to support the lower surface of the limiting ring 210 located at the edge of the opening of the five-gallon bucket 201, and the abutment structure 332 abuts against the side wall of the limiting ring 210 below the edge of the opening of the five-gallon bucket 201.

[0056] It is understandable that when multiple abutment structures 332 are provided, some abutment structures 332 may be located above the bearing structure 331 along the second direction Y, and other abutment structures 332 may be located below the bearing structure 331 along the second direction Y.

[0057] Please refer to Figures 4 and 6. The second limiting member 33 has a reinforcing structure 333 on the side opposite to the first limiting member 32, and the reinforcing structure 333 is set at an angle to the second limiting member 33. The reinforcing structure 32 serves to strengthen and support, thereby improving the structural strength of the second limiting member 33.

[0058] Optionally, both the load-bearing structure 331 and the reinforcing structure 333 are arranged perpendicularly to the second limiting member 33. Multiple reinforcing structures with smaller inclined configurations may also be provided between the reinforcing structure 333 and the second limiting member 33.

[0059] For example, in one embodiment, the second limiting member 33 is an arc-shaped plate, and the supporting structure 331 and the reinforcing structure 333 are both flat plates, and are respectively connected to the opposite sides of the second limiting member 33 and located on the same plane.

[0060] Please refer to Figures 1, 4, and 7. Figure 7 is a schematic diagram of the dust collection device according to Embodiment 3 of this application.

[0061] The collecting section 10 extends circumferentially along the five-gallon container 201. The inner side of the collecting section 10 guides dust from inside the five-gallon container 201 into the interface section 20. The outer side of the collecting section 10 has a contact surface 12, which is used to contact the inner circumferential wall of the five-gallon container 201. Specifically, in its natural state when the dust collecting device 100 is not assembled with the five-gallon container 201, the radius of the contact surface 12 is slightly larger than the radius of the five-gallon container 201. When the dust collecting device 100 is assembled with the five-gallon container 201, the contact surface 12 tends to expand radially outward under the squeezing action of the inner circumferential wall of the five-gallon container 201, thereby enabling it to fit tightly against the inner circumferential wall of the five-gallon container 201 and to offset or balance part of the downward gravity experienced by the interface section 20 due to the connection of the external pipe, so as to prevent the collecting section 10 from tilting upward.

[0062] Optionally, the interface section 20 is connected to the middle of the collection section 10. That is, the collection section 10 is symmetrically arranged with respect to the interface section 20.

[0063] Please refer to Figure 9, which is a top view of the dust collection device in Embodiment 3 of this application. Along the extending direction of the collection section 10, the angle formed by the lines connecting the two ends of the collection section 10 to its central axis is α, and 140°≤α≤155°. Thus, it can be understood that the larger α is, the longer the extension length of the collection section 10, which is more conducive to the collection of dust from the five-gallon bucket 201. However, if α is too large, the dust collection device 100 becomes too large, inconvenient to transport, and costly. Therefore, setting 140°≤A≤155° is beneficial for ensuring the collection capacity of the collection section 10 for collecting dust from the five-gallon bucket 201, and also helps to reduce the material and transportation costs of the dust collection device 100. Optionally, the value of location A can be 140°, 143°, 145°, 147°, 147.5°, 148°, 149°, 150°, 155°, etc. The specific value can be set according to actual needs, and will not be listed here.

[0064] Please refer to Figures 2, 4, and 8. Figure 8 is a side view of the dust collection device in Embodiment 3 of this application. The outer wall of the collection section 10 is also provided with a third limiting member 11. Along the second direction Y, the third limiting member 11 is located above the contact surface 12, and when the contact surface 12 is attached to the inner peripheral wall of the five-gallon bucket 201, the third limiting member 11 presses against the opening edge of the five-gallon bucket 201. It is understood that when a vacuum cleaner or other suction device is connected to the interface section 20 via a connecting pipe, the interface section 20 tends to droop under the weight of the connecting pipe, which can easily cause the collection section 10 to tilt upwards. Excessive upward tilting of the collection section 10 can cause a gap to form between the contact surface 12 and the inner wall of the five-gallon bucket 201, preventing them from fitting together. At this time, the third limiting member 11 is pressed against the opening edge of the five-gallon bucket 201, which can prevent the collection part 10 from tilting upward, thereby helping to ensure that the contact surface 12 and the inner wall of the five-gallon bucket 201 remain in contact.

[0065] Referring to Figures 3 and 4, the collection section 10 includes a first wall 13 and a second wall 14. A contact surface 12 is disposed on the first wall 13. Along the second direction Y, the second wall 14 is connected above the first wall 13, and along the first direction X, the second wall 14 is inclined towards the central axis of the five-gallon container 201. It is understood that the second wall 14 can prevent dust inside the five-gallon container from further spreading upwards; that is, the second wall 14 plays a guiding role in the dust within the five-gallon container 201.

[0066] The interface 20 is connected at the junction of the first wall 13 and the second wall 14. This facilitates the collection of dust that rises from the five-gallon container 201 along the second wall 14 towards the interface 20.

[0067] Optionally, in one embodiment, as shown in FIG7, the first wall 13 is configured as a semi-annular wall, and the outer surface of the semi-annular wall forms a mating surface 12.

[0068] In another embodiment, as shown in Figures 3 and 4, a plurality of fourth limiting members 131 are provided on the outer surface of the first wall 13. The plurality of fourth limiting members 131 are distributed at intervals along the inner peripheral wall of the five-gallon bucket 201, and each fourth limiting member 131 is provided with a sub-adhesive surface 132 for adhering to the inner peripheral wall of the five-gallon bucket 201. That is, in this embodiment, a plurality of sub-adhesive surfaces 132 define the adhesive surface 12.

[0069] Furthermore, the fourth limiting member 131 is configured to correspond one-to-one with the third limiting member 11.

[0070] Please refer to Figure 8. The angle between the second wall 14 and the plane containing the opening of the five-gallon bucket 201 is β, and 50°≤β≤60°. It is understandable that, assuming the width of the second wall 14 along the radial direction of the five-gallon bucket 201 is the same, a larger β results in a larger area of ​​the second wall 14, thus improving the dust collection effect inside the five-gallon bucket 201. However, if β is too large, it will occupy too much space above the five-gallon bucket 201, interfering with the user's emptying of the contents. By setting 50°≤β≤60°, it is beneficial to ensure the effective dust collection of the collection unit 10 within the five-gallon bucket 201 without affecting the user's emptying of the contents. For example, the value of β can be 50°, 52°, 53°, 55°, 56°, 58°, 60°, etc., and can be set according to actual needs; these are not listed here.

[0071] Referring to Figures 9 and 10, the interface portion 20 includes multiple interconnected connecting segments 21. Along the direction from near the collection portion 10 to away from the collection portion 10, the inner diameter of the connecting segments 21 gradually increases, forming a limiting step 22 at the connection point of two adjacent connecting segments 21. Thus, multiple connecting segments 21 with different inner diameters can accommodate pipes of different thicknesses, and the end of the pipe can be stopped at the limiting step 22 to prevent the pipe from excessively extending into the interface portion 20.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A dust collection device, characterized in that, The dust collection device has a collection part, an interface part, and an installation part. The dust collection device is installed on the container through the installation part. The collection part is located inside the container. The interface part is connected to the collection part and is located outside the container. When a suction force is provided at the interface, the collection section is able to collect the dust inside the container.

2. The dust collection device according to claim 1, characterized in that, The mounting part has a slot for engaging with the opening edge of the container.

3. The dust collection device according to claim 2, characterized in that, The mounting part includes a first limiting member and a second limiting member. The first limiting member is connected to the collecting part, and the second limiting member is connected to the interface part. Along the first direction X, the first limiting member and the second limiting member are spaced apart, and the first limiting member, the second limiting member and the outer wall of the interface part form the slot.

4. The dust collection device according to claim 3, characterized in that, The second limiting member has a support structure disposed toward the first limiting member, the support structure being used to support the outer peripheral structure of the container along a second direction Y, wherein the second direction Y is perpendicular to the first direction X.

5. The dust collection device according to claim 4, characterized in that, The second limiting member also has an abutment structure disposed toward the first limiting member, the abutment structure being used to abut against the side of the outer peripheral structure of the container along the first direction X.

6. The dust collection device according to claim 5, characterized in that, Along the second direction Y, the abutment structure is located above the supporting structure, and the abutment structure extends in an arc shape to adapt to the outer peripheral structure of the container; or, Along the second direction Y, the abutment structure is located below the supporting structure, and the abutment structure extends in a long strip along the second direction Y.

7. The dust collection device according to claim 3, characterized in that, The second limiting member has a reinforcing structure on the side opposite to the first limiting member, and the reinforcing structure is set at an angle to the second limiting member.

8. The dust collection device according to claim 1, characterized in that, The collection section extends circumferentially along the container. The inner side of the collection section is used to guide dust from inside the container into the interface section. The outer side of the collection section has a fitting surface, which is used to fit the inner circumferential wall of the container.

9. The dust collection device according to claim 8, characterized in that, The outer wall of the collection part is also provided with a third limiting member. Along the second direction Y, the third limiting member is located above the bonding surface, and when the bonding surface is attached to the inner peripheral wall of the container, the third limiting member is pressed against the opening edge of the container.

10. The dust collection device according to claim 8, characterized in that, The collecting part includes a first wall and a second wall. The fitting surface is disposed on the first wall along the second direction Y. The second wall is connected above the first wall and along the first direction X. The second wall moves toward the direction close to the central axis of the container.

11. The dust collection device according to claim 10, characterized in that, The first wall is configured as a semi-annular wall, and the outer surface of the semi-annular wall forms the mating surface.

12. The dust collection device according to claim 10, characterized in that, The outer surface of the first wall is provided with a plurality of fourth limiting members, which are distributed at intervals along the inner peripheral wall of the container, and each of the fourth limiting members is provided with a sub-adhesive surface, which is used to adhere to the inner peripheral wall of the container.

13. The dust collection device according to claim 10, characterized in that, The angle between the second wall and the plane containing the container opening is β, and 50°≤β≤60°.

14. The dust collection device according to claim 8, characterized in that, Along the extending direction of the collecting part, the angle formed by the lines connecting the two ends of the collecting part and its central axis is α, and 140°≤α≤155°.

15. The dust collection device according to claim 1, characterized in that, The interface includes multiple sequentially connected connecting segments. Along the direction from near the collection part to away from the collection part, the inner diameter of the multiple sequentially connected connecting segments increases step by step, so that a limiting step is formed at the connection between two adjacent connecting segments.

16. A mixing device, characterized in that, It includes a container and a dust collection device as described in any one of claims 1-15.

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