A multi-stage sieving device for tungsten carbide powder

Abstract

This application relates to the technical field of tungsten ore production equipment, specifically disclosing a multi-stage tungsten carbide powder screening device. The device includes a support base with a supporting inclined surface; a screening component is disposed on the supporting inclined surface, comprising a support column, an elastic element, a screening box, a vibrating motor, and at least two screens. The support column is disposed on the supporting inclined surface, one end of the elastic element is coaxially connected to the support column, and the other end is connected to the screening box. The vibrating motor is fixedly installed at the bottom of the screening box. A through cavity is provided through the screening box along its length, and at least two screens are disposed within the through cavity. A storage bin assembly is disposed at the feed end of the screening component for storing and conveying the tungsten carbide powder to be screened. A collection box is disposed at the discharge end of the screening component for collecting the tungsten carbide powder screened by the screening component. The device can simultaneously screen tungsten carbide powder of different particle sizes, thereby improving the screening efficiency and effect of tungsten carbide powder.

Description

Technical Field

[0001] This application relates to the field of tungsten ore production equipment technology, and in particular to a multi-stage screening device for tungsten carbide powder. Background Technology

[0002] In the industrial production of tungsten carbide powder, the sieving process is crucial for controlling the particle size distribution of the powder, which directly affects the mechanical properties of cemented carbide.

[0003] In related technologies, screening devices use a single-layer screen to sieve tungsten carbide powder to obtain tungsten carbide powder of the corresponding particle size. However, due to the high surface activity of tungsten carbide powder, existing screening devices are prone to particle agglomeration during the screening process, leading to frequent clogging of the screen. This not only reduces screening efficiency but also seriously affects the continuity of production. On the other hand, existing screening devices cannot achieve precise division of multiple particle size ranges, which also directly affects the screening effect and screening efficiency. Utility Model Content

[0004] This invention proposes a multi-stage sieving device for tungsten carbide powder, which aims to solve at least the problems in related technologies, such as low sieving efficiency and inability to achieve precise particle size division, resulting in poor sieving effect of tungsten carbide powder.

[0005] In a first aspect, this application provides a multi-stage sieving device for tungsten carbide powder, comprising: A support base having a supporting inclined surface; A screening assembly is disposed on the supporting inclined surface. The screening assembly includes a support column, an elastic element, a screening box, a vibrating motor, and at least two screens. The support column is disposed on the supporting inclined surface. One end of the elastic element is coaxially connected to the support column, and the other end is connected to the screening box. The vibrating motor is fixedly installed at the bottom of the screening box. A through cavity is provided through the screening box along its length, and the at least two screens are disposed in the through cavity. A storage bin assembly is located at the feed end of the screening assembly and is used to store and transport tungsten carbide powder to be screened. A collection box is located at the discharge end of the screening component and is used to collect tungsten carbide powder after it has been screened by the screening component.

[0006] In some embodiments, the mesh count of the at least two screens increases sequentially from top to bottom along the height direction of the passage cavity.

[0007] In some embodiments, the at least two screens include a first screen and a second screen, the first screen and the second screen are spaced apart in the cavity from top to bottom along the height direction of the screening box, and the mesh number of the first screen is smaller than the mesh number of the second screen.

[0008] In some embodiments, the first screen and the second screen extend circumferentially to the inner wall of the cavity to form a plurality of sieving channels spaced apart within the cavity, wherein the plurality of sieving channels are configured to sieve tungsten carbide powder of different particle sizes.

[0009] In some embodiments, the screening box is provided with a plurality of material collection ports at one end near the collection box, and the plurality of material collection ports correspond one-to-one with the plurality of screening channels and are individually connected.

[0010] In some embodiments, at least two of the vibrating motors are spaced apart at the bottom of the screening box near the storage hopper assembly.

[0011] In some embodiments, the storage silo assembly includes a silo body having a receiving cavity and a distributing structure. The top of the silo body is provided with a feed inlet communicating with the receiving cavity. The distributing structure is disposed on the inner wall of the receiving cavity near the feed inlet for dispersing the tungsten carbide powder to be screened added into the receiving cavity.

[0012] In some embodiments, the material distribution structure includes a support connected at one end to the inner wall of the receiving cavity, and a baffle disposed at the other end of the support, the baffle at least partially overlapping the projected outline of the feed inlet along the height direction of the receiving cavity.

[0013] In some embodiments, the baffle is provided with an outwardly convex surface facing the feed inlet.

[0014] In some embodiments, the bottom of the hopper is provided with a discharge port communicating with the receiving cavity, and one end of the discharge port extends between the at least two screens and the top surface of the cavity.

[0015] Compared with the prior art, one or more technical solutions provided in this application have at least the following beneficial effects or advantages: The device provided in this application uses an inclined screening component, which includes a screening box with a through cavity and multiple screens arranged in the through cavity. The multiple screens are spaced apart along the height of the through cavity, and the mesh size of the multiple screens can be arranged to increase sequentially from top to bottom along the through cavity. During the screening process, the tungsten carbide powder to be screened is added to the screening box through a storage bin component. The entire screening box vibrates through a vibration motor and elastic components, thereby reducing the phenomenon of particle agglomeration during the screening process, avoiding frequent clogging of the screens, and improving the screening efficiency of the tungsten carbide powder to be screened. At the same time, the tungsten carbide powder to be screened undergoes multi-layer screening in the through cavity through multiple screens. The screen aperture of the screens arranged from top to bottom decreases sequentially, so that each layer of screens removes tungsten carbide powder larger than the screen aperture, realizing the simultaneous screening of tungsten carbide powder of different particle sizes, further improving the screening effect and screening efficiency.

[0016] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments 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.

[0018] Figure 1 This is a schematic diagram of the screening device provided according to an embodiment of this application; Figure 2 This is a structural schematic diagram of the base and screening assembly provided according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the screening component provided according to an embodiment of this application; Figure 4 This is a cross-sectional view of the screening component provided according to an embodiment of this application; Figure 5 This is a cross-sectional view of a storage bin assembly provided according to an embodiment of this application; Figure 6 This is a schematic diagram of the material distribution structure provided according to the embodiments of this application.

[0019] Figure label: 100. Screening device; 10. Base; 11. Supporting ramp 20. Screening assembly; 21. Support column; 22. Elastic element; 23. Screening box; 231. Through cavity; 24. Vibrating motor; 25. Screen; 251. First screen; 252. Second screen; 26. Collection port; 261. First collection port; 262. Second collection port; 263. Third collection port; 30. Storage bin assembly; 31. Bin body; 311. Receiving cavity; 312. Feed inlet; 313. Discharge outlet; 314. Inclined plate; 32. Material distribution structure; 321. Mounting plate; 322. Bracket; 323. Baffle; 3231. Outer convex surface; 40. Collection box; 41. First collection area; 42. Second collection area; 43. Third collection area; A. First direction; B. Second direction. Detailed Implementation

[0020] The embodiments of this application are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are merely for explaining this application and are not intended to limit this application.

[0021] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. "Multiple" means at least two, that is, two or more; "multiple" means at least two, that is, two or more.

[0022] In this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of 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 herein includes any and all combinations of one or more of the associated listed items.

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments.

[0025] Please see Figures 1 to 4 This embodiment provides a multi-stage sieving device 100 for tungsten carbide powder. The sieving device 100 may include a support base 10, a sieving assembly 20, a storage silo assembly 30, and a collection box 40. For ease of description, the length direction of the support base 10 is defined as the first direction A, and the height direction of the support base 10 is defined as the second direction B. The first direction A and the second direction B are perpendicular to each other. The top surface of the support base 10 may be sequentially provided with a first mounting portion, a supporting inclined surface 11, and a second mounting portion along the first direction A. The mounting part is higher than the second mounting part in the second direction B. One end of the supporting inclined surface 11 extends to the first mounting part and the other end extends to the second mounting part, thus forming an angle with the horizontal plane. The screening component 20 is set on the supporting inclined surface 11. The storage bin component 30 is set at the feed end of the screening component 20, i.e., the first mounting part. The collection box 40 is set at the discharge end of the screening component 20, i.e., the second mounting part. The storage bin component 30 is used to store and transport the tungsten carbide powder to be screened. The collection box 40 is used to collect the tungsten carbide powder after being screened by the screening component 20.

[0026] Specifically, the screening assembly 20 may include a support column 21, an elastic element 22, a screening box 23, a vibrating motor 24, and at least two screens 25. The support column 21 is disposed on the support inclined surface 11. One end of the elastic element 22 is coaxially connected to the support column 21, and the other end is connected to the screening box 23. The vibrating motor 24 is fixedly installed at the bottom of the screening box 23. A through cavity 231 is provided through the screening box 23 along its length. At least two screens 25 are disposed in the through cavity 231. The screening box 23 may be rectangular. The through cavity 231 is inclined downwards, and its two ends face the storage bin assembly 30 and the collection box 40, respectively.

[0027] It should be understood that the number of support columns 21 and elastic elements 22 is the same. Preferably, four sets of support columns 21 and elastic elements 22 are provided, that is, four sets of support columns 21 and elastic elements 22 are respectively provided near the four corners of the screening box 23, thereby improving the stability of the screening box 23 during vibration. The elastic element 22 is preferably a spring structure. At the same time, the support columns 21 and elastic elements 22 are coaxially arranged. The two ends of the elastic element 22 can be welded to the support columns 21 and the screening box 23 respectively. The vibration motor 24 is installed at the bottom of the screening box 23. By controlling the operation of the vibration motor 24, the screening box 23 is driven to vibrate. At the same time, due to the influence of the elastic elements 22, the vibration effect of the screening box 23 is improved, so as to screen the tungsten carbide powder.

[0028] The vibration motor 24 can be obtained from existing technology, and its specific model can be selected according to actual needs. At least two vibration motors 24 are spaced apart at the bottom of the screening box 23 near the storage bin assembly 30, so that the vibration effect in the part of the screening box 23 near the storage bin assembly 30 is better.

[0029] It should be noted that two, three, or four screens 25 can be set, preferably two. By setting different numbers of screens 25, sieving of tungsten carbide powder of different particle sizes can be achieved. The bottom of the end face of the storage bin assembly 30 near the screening assembly 20 is provided with a discharge structure, which is connected to the screening assembly 20. At the same time, in the screening box 23, the end of the discharge structure should be located above the uppermost screen 25, so that the outflowing tungsten carbide powder to be screened is screened sequentially. In order to prevent tungsten carbide powder from flowing out from the connection between the storage bin assembly 30 and the screening assembly 20, the connection between the storage bin assembly 30 and the screening assembly 20 can be sealed, that is, the storage bin assembly 30 and the screening assembly 20 are sealed and connected.

[0030] The collection box 40 can be provided with multiple collection areas inside. In this embodiment, when the screen 25 is set with two pieces, the collection box 40 can include a first collection area 41, a second collection area 42 and a third collection area 43. The first collection area 41, the second collection area 42 and the third collection area 43 are respectively used to collect tungsten carbide powder of different particle sizes after screening, and respectively correspond to multiple discharge ports provided in the screening box 23. The first collection area 41, the second collection area 42 and the third collection area 43 are separated from each other. In order to facilitate the transfer of tungsten carbide powder of different particle sizes from each collection area of ​​the collection box 40, three outlets can be provided in the collection box 40 respectively connected to the first collection area 41, the second collection area 42 and the third collection area 43.

[0031] The screening device 100 provided in this embodiment uses an inclined screening component 20. This component 20 includes a screening box 23 with a through cavity 231 and multiple screens 25 disposed within the through cavity 231. The multiple screens 25 are spaced apart along the height of the through cavity 231, and the mesh size of the multiple screens 25 can be arranged to increase sequentially from top to bottom along the through cavity 231. During the screening process, the tungsten carbide powder to be screened is added to the screening box 23 through the storage bin component 30, and the screening is performed by a vibration motor 24 and an elastic element 22. The setup causes the entire screening chamber 23 to vibrate, thereby reducing particle agglomeration during the screening process, preventing frequent clogging of the screen 25, and improving the screening efficiency of the tungsten carbide powder to be screened. At the same time, the tungsten carbide powder to be screened undergoes multi-layer screening through multiple screens 25 in the passage cavity 231. The screen aperture of the screens 25 arranged from top to bottom decreases sequentially, so that each layer of screens 25 can screen out tungsten carbide powder larger than the screen aperture, realizing the simultaneous screening of tungsten carbide powder of different particle sizes, further improving the screening effect and screening efficiency.

[0032] Please see Figure 3 and Figure 4 In some embodiments, at least two screens 25 have progressively increasing mesh counts from top to bottom along the height direction of the passage cavity 231. These at least two screens 25 may include a first screen 251 and a second screen 252. The first screen 251 and the second screen 252 are sequentially spaced apart within the passage cavity 231 along the height direction of the screening box 23, and the mesh count of the first screen 251 is smaller than that of the second screen 252. Specifically, the mesh counts of the first screen 251 and the second screen 252 are set to be different, and their mesh counts along the height direction of the passage cavity 231 are... The mesh number of the screen 25 increases sequentially from top to bottom along the height direction. It should be explained that the larger the mesh number, the greater the density of the sieve holes and the smaller the diameter of the sieve holes. This allows for multi-layer sieving of tungsten carbide powder. Large-diameter tungsten carbide powder can be sieved through the first screen 251, while the tungsten carbide powder falling onto the second screen 252 is further sieved to obtain medium-diameter tungsten carbide powder. The tungsten carbide powder that falls into the bottom of the cavity 231 through the second screen 252 has the smallest particle size, thus obtaining tungsten carbide powder of three different particle sizes.

[0033] Optionally, the first screen 251 and the second screen 252 extend circumferentially to the inner wall of the cavity 231, so that multiple screening channels are formed in the cavity 231 at intervals, wherein the multiple screening channels are configured to screen tungsten carbide powder of different particle sizes. The screening box 23 is provided with multiple collection ports 26 at one end near the collection box 40. The multiple collection ports 26 correspond one-to-one with multiple screening channels and are individually connected. The multiple collection ports 26 may include a first collection port 261, a second collection port 262 and a third collection port 263. The first collection port 261 can be set at the bottom of the screening box 23 and is connected to the through cavity 231 to discharge the smallest particle size of tungsten carbide powder at the bottom. The second collection port 262 and the third collection port 263 are staggered to discharge medium and large particle size tungsten carbide powder. At the same time, the first collection port 261, the second collection port 262 and the third collection port 263 correspond to the first collection area 41, the second collection area 42 and the third collection area 43 of the collection box 40, respectively, so as to facilitate the collection of tungsten carbide powder after screening.

[0034] Please see Figure 5 and Figure 6 In some embodiments, the storage silo assembly 30 includes a silo body 31 with a receiving cavity 311 and a distribution structure 32. The top of the silo body 31 is provided with an inlet 312 communicating with the receiving cavity 311. The distribution structure 32 is disposed on the inner wall of the receiving cavity 311 near the inlet 312 for dispersing the tungsten carbide powder to be screened added into the receiving cavity 311. The distribution structure 32 includes a support 322 connected at one end to the inner wall of the receiving cavity 311 and a baffle 323 disposed at the other end of the support 322. The baffle 323 and the inlet 312 at least partially overlap the projected outline along the height direction of the receiving cavity 311. The baffle 323 is provided with an outwardly convex surface 3231 facing the inlet 312. The bottom of the silo body 31 is provided with an outlet 313 communicating with the receiving cavity 311. One end of the outlet 313 extends between at least two screens 25 and the top surface of the cavity 231.

[0035] It should be noted that the material distribution structure 32 also includes a mounting plate 321 disposed at the end of the support 322 away from the baffle 323. The mounting plate 321 is used to connect to the inlet 312 in the receiving cavity 311. With the setting of the material distribution structure 32, when tungsten carbide powder is added to the receiving cavity 311 in the bin 31 from the inlet 312, it can be further dispersed by the outward convex surface 3231 on the baffle 323 and dispersed into the receiving cavity 311, thereby making full use of the space in the receiving cavity 311. At the same time, it improves the porosity of the tungsten carbide powder so that the tungsten carbide powder can flow out from the outlet 313. Of course, it is understood that a valve can be set at the inlet 312 to control the flow of tungsten carbide powder into the passage cavity 231.

[0036] Furthermore, in order to facilitate the flow of tungsten carbide powder from the discharge port 313 into the space between the top surface of the block screen 25 and the cavity 231 by gravity, an inclined plate 314 can be provided at the bottom of the receiving cavity 311. The inclined plate 314 is inclined towards the discharge port 313, that is, the end away from the discharge port 313 is higher in the vertical direction than the end near the discharge port 313. As a result, the tungsten carbide powder added to the bin 31 will gather towards the discharge port 313, thus facilitating the flow of tungsten carbide powder from the discharge port 313.

[0037] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on the utility model.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0039] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0040] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A multi-stage sizing apparatus for tungsten carbide powder, characterized by, include: A support base having a supporting inclined surface; A screening assembly is disposed on the supporting inclined surface. The screening assembly includes a support column, an elastic element, a screening box, a vibrating motor, and at least two screens. The support column is disposed on the supporting inclined surface. One end of the elastic element is coaxially connected to the support column, and the other end is connected to the screening box. The vibrating motor is fixedly installed at the bottom of the screening box. A through cavity is provided through the screening box along its length, and the at least two screens are disposed in the through cavity. A storage bin assembly is located at the feed end of the screening assembly and is used to store and transport tungsten carbide powder to be screened. A collection box is located at the discharge end of the screening component and is used to collect tungsten carbide powder after it has been screened by the screening component.

2. The tungsten carbide powder multi-stage sizing apparatus of claim 1, wherein, The mesh count of the at least two screens increases sequentially from top to bottom along the height of the passage.

3. The multi-stage sizing apparatus for tungsten carbide powder according to claim 2, wherein, The at least two screens include a first screen and a second screen. The first screen and the second screen are arranged at intervals from top to bottom along the height direction of the screening box in the through cavity, and the mesh number of the first screen is smaller than the mesh number of the second screen.

4. The multi-stage sizing apparatus for tungsten carbide powder according to claim 3, wherein, The first and second mesh screens extend circumferentially to the inner wall of the cavity to form a plurality of sieving channels spaced apart within the cavity, wherein the plurality of sieving channels are configured to sieve tungsten carbide powder of different particle sizes.

5. The multi-stage sizing apparatus for tungsten carbide powder according to claim 4, wherein, The screening box is provided with multiple material collection ports at one end near the collection box. Each of the multiple material collection ports corresponds to and is individually connected to the multiple screening channels.

6. The multi-stage sizing apparatus for tungsten carbide powder of claim 2, wherein, At least two of the vibrating motors are spaced apart at the bottom of the screening box near the storage hopper assembly.

7. The multi-stage sizing apparatus for tungsten carbide powder of claim 1, wherein, The storage silo assembly includes a silo body with a receiving cavity and a material distribution structure. The top of the silo body is provided with a feed inlet communicating with the receiving cavity. The material distribution structure is disposed on the inner wall of the receiving cavity near the feed inlet for dispersing the tungsten carbide powder to be screened added into the receiving cavity.

8. The multi-stage sizing apparatus of tungsten carbide powder according to claim 7, wherein, The material distribution structure includes a support connected at one end to the inner wall of the receiving cavity, and a baffle disposed at the other end of the support. The baffle at least partially overlaps with the projection outline of the feed inlet along the height direction of the receiving cavity.

9. The multi-stage sizing apparatus of tungsten carbide powder according to claim 8, wherein, The baffle is provided with an outwardly convex surface facing the feed inlet.

10. The multi-stage sizing apparatus of tungsten carbide powder according to claim 7, wherein, The bottom of the hopper is provided with a discharge port that communicates with the receiving cavity, and one end of the discharge port extends between the at least two screens and the top surface of the cavity.

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