Powder screening device

Abstract

The utility model is suitable for the technical field of screening devices, and provides a powder screening device which comprises a machine frame, a cavity is formed in the machine frame, a through hole communicated with the cavity is formed in the top wall of the machine frame, a feeding hopper is fixedly installed in the through hole, a discharging hopper communicated with the cavity is further arranged on the side wall of the machine frame, and the discharging hopper is arranged on the top wall of the machine frame. A feeding hopper is arranged in the cavity, a discharging hopper is arranged in the cavity, a crushing assembly located below the feeding hopper is further movably arranged in the cavity, a guide plate is arranged in the cavity below the crushing assembly, and a screening cylinder is further rotationally connected to the outer side of the discharging hopper. The crushing assembly is used for crushing materials bonded into blocks, then the materials enter the screening barrel along the material guide plate for follow-up screening, the crushing assembly can be used for crushing blocky powder, and therefore the follow-up screening effect is improved, and the problems that due to powder caking, screening is not fine, and the screening effect is reduced are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of screening devices, in particular to a powder screening device. Background Art

[0002] Powder spraying is the process of spraying powder coating onto the surface of a workpiece using a powder spraying device. Under the action of static electricity, the powder will be evenly adsorbed on the surface of the workpiece to form a powdery coating. The powdery coating is then baked and leveled and solidified at high temperature to become a final coating with varying effects. The powder used in the spraying process usually needs to be sifted using a powder screening device.

[0003] The Chinese utility model patent with announcement number CN215313804U is an adjustable screening device for ultrafine spray powder, comprising a bottom plate, a shell body is provided above the bottom plate, a horizontal plate is fixedly connected to the bottom of the inner cavity of the shell, a collection box for collecting nozzle powder is provided above the horizontal plate, a screening box for screening is provided above the collection box, and also includes a vibration component, a screening component and a discharge component, the vibration component is used to drive the screening box to shake, thereby driving the spray powder to move repeatedly on the first screen plate and the second screen plate, quickly screening the spray powder, the screening component is used to screen the spray powder, the spray powder is initially screened by the first screen plate, and the spray powder is secondary screened by the second screen plate, thereby improving the screening effect of the utility model, and the discharge component is used to uniformly discharge the material to prevent the spray powder from excessively agglomerating, which makes the powder screening operation more difficult.

[0004] However, the above device has the following technical problems when actually used:

[0005] 1. The above-mentioned device feeds the spray powder into the shell from the feed port, and uses the shaking (vibration) of the first sieve plate and the second sieve plate to screen out large-volume impurities mixed in the powder. However, in some usage scenarios, the powder used for spraying may stick to each other and form lumps. The above-mentioned device lacks a device for crushing the powder lumps. Simply using vibration cannot effectively break up the lumps, which will affect the actual powder screening effect.

[0006] Secondly, the above device lacks a structure for removing impurities after screening. After the powder is screened, the impurities remaining in the powder will accumulate on the first sieve plate and the second sieve plate, and will need to be manually cleaned later. This method increases the workload required by the workers, and excessive accumulation of impurities will also affect the circulation of the powder. Utility Model Content

[0007] The utility model provides a powder screening device, which aims to solve the problem mentioned in the above background technology that the above device lacks a device for crushing agglomerated powder. Simply relying on shaking cannot effectively crush the block powder, which affects the actual powder screening effect. At the same time, the above device needs to manually remove the impurities screened on the first sieve plate and the second sieve plate, which increases the labor workload. At the same time, excessive accumulation of impurities will also affect the subsequent circulation of powder.

[0008] The utility model is implemented as follows: a powder screening device comprises: a frame, a cavity is opened inside the frame, and a through hole communicating with the cavity is opened on the top wall of the frame, a feed hopper is fixedly installed in the through hole, a discharge hopper communicating with the cavity is further provided on the side wall of the frame, a crushing assembly located below the feed hopper is movably provided in the cavity, and a guide plate is provided in the cavity below the crushing assembly, the guide plate is used to transport the crushed powder into the discharge hopper, the outer side of the discharge hopper is also rotatably connected to a screening drum, and a rotating drive movably connected to the screening drum is provided in the frame Dynamic component, a plurality of screening components are arranged at equal intervals in the screening cylinder, and a plurality of groups of the screening components are arranged in sequence on one side of the discharge hopper, and a plurality of the screening components are used to screen out impurities in the powder; in this scheme, the powder in the device is discharged into the cavity from the feed hopper, and the powder will first contact the crushing component, and the crushing component is used to crush the material that is bonded into blocks, and then enter the screening cylinder along the guide plate for subsequent screening. The crushing component can be used to crush the block powder, thereby improving the subsequent screening effect and avoiding the problem of incomplete screening and reduced screening effect due to powder agglomeration.

[0009] In addition, after the powder in this device enters the screening drum, it will move along its inclined inner wall toward the end away from the discharge hopper. During the movement, the powder will pass through multiple screening components in sequence. At the same time, with the rotation of the screening drum, qualified powder will fall through the screening holes into the first collection box below, while impurities cannot pass through the screening holes and thus roll down to the end of the screening drum away from the discharge hopper, and fall along the waste outlet into the second collection box below for unified collection.

[0010] Preferably, the crushing assembly includes: two rotating shafts rotatably connected to the cavity, the two rotating shafts are symmetrically arranged, and a crushing roller is fixedly installed on the outer wall of each rotating shaft, the feed hopper is correspondingly arranged above the two crushing rollers, the same-side ends of the two rotating shafts extend to the outside of the frame, and are fixedly installed with transmission gears, the two transmission gears are meshed with each other, and a first motor is also fixedly installed on one side wall of the frame, whose output end is fixedly connected to the end of one of the rotating shafts; in this scheme, when the output end of the first motor rotates in this device, it will drive the rotating shaft fixed thereto to rotate, and the transmission gear on the end of the rotating shaft drives the transmission gear on the end of the rotating shaft on the other side to rotate, thereby controlling the rotating shaft on the other side to rotate in the opposite direction, and the crushing rollers on the outer walls of the two rotating shafts rotate, when the powder is discharged from the feed hopper, it will fall between the two crushing rollers, and the crushing rollers will be used to crush the powder lumps, and the crushed powder will fall onto the guide plate below and be transported to the discharge hopper along the inclined guide plate.

[0011] Preferably, the screening drum is funnel-shaped, and its inner aperture size at the end away from the discharge hopper is larger than its inner aperture size at the end close to the discharge hopper. A plurality of waste outlets for discharging impurities are provided at equal angles around the outer wall of the screening drum away from the discharge hopper, and a second collection box is also provided on one side of the frame corresponding to the waste outlet. In this scheme, the screening drum arranged in a funnel shape can ensure that when the powder is discharged along the discharge hopper, it can move along its inclined inner wall toward the end away from the discharge hopper. During the movement, it is screened by multiple screening components, and qualified products fall into the first collection box, while impurities cannot pass through the screening holes and eventually enter the second collection box along the waste outlet.

[0012] Preferably, the rotary drive assembly includes: a second motor fixedly mounted in the cavity, a drive gear fixedly mounted on the output end thereof extending to the outside of the frame, one end of the screening drum is sleeved on the outside of the discharge hopper, and a gear ring is fixedly mounted on the outer wall thereof, and the gear ring is meshingly connected with the drive gear; in this scheme, when the output end of the second motor rotates, it will control the rotation of the drive gear, and the drive gear will control the rotation of the gear ring meshed therewith, and since the gear ring is fixedly mounted on the outside of the screening drum, the gear ring will control the rotation of the screening drum outside the discharge hopper to cooperate with multiple screening assemblies to screen the powder.

[0013] Preferably, each group of the screening components includes: a material blocking component arranged around the inner peripheral wall of the screening drum, and the material blocking component has at least two material blocking plates fixed to the inner wall of the screening drum, the two material blocking plates are symmetrically arranged, and an outlet for powder flow is formed between the adjacent ends of the two material blocking plates, and each material blocking component is provided with a screening hole around the screening drum on one side of the screening drum near the discharge hopper; in this scheme, when the powder is discharged from the discharge hopper, it will fall onto the inner wall of the screening drum, and then roll along the inclined inner wall of the screening drum, and pass through multiple screening components in sequence, the powder will contact the material blocking plate, and the powder will be intercepted by the material blocking plate, and then qualified powder will be discharged along the screening hole and fall into the first collection box below, while unqualified impurities will move to the next screening component position along the outlet after the material blocking plate rotates to the specified position, and finally the impurities will roll to the end of the screening drum away from the discharge hopper and be discharged along the waste outlet while falling into the second collection box.

[0014] Preferably, in each of the two adjacent screening assemblies, the discharge outlets are staggered. In this solution, the staggered discharge outlets can ensure that the powder stays in each screening assembly for a sufficient time, thereby ensuring the stability of the screening operation.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: a powder screening device of the present invention:

[0016] 1. In this device, the powder is discharged into the cavity from the feed hopper. The powder will first contact the crushing component, which will crush the material that has been bonded into blocks. Then, the powder will enter the screening cylinder along the guide plate for subsequent screening. The crushing component can crush the block powder, thereby improving the subsequent screening effect and avoiding the problem of incomplete screening and reduced screening effect due to powder agglomeration.

[0017] 2. In this device, after the powder enters the screening drum, it will move along its inclined inner wall toward the end away from the discharge hopper. During the movement, the powder will pass through multiple screening components in sequence. At the same time, with the rotation of the screening drum, qualified powder will fall through the screening holes into the first collection box below, while impurities cannot pass through the screening holes and roll to the end of the screening drum away from the discharge hopper, and fall along the waste outlet into the second collection box below for unified collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front cross-sectional view of the utility model;

[0019] Figure 2 It is a cross-sectional view of the screening drum in the present utility model;

[0020] Figure 3 It is a top view of the utility model;

[0021] In the picture:

[0022] 1. Frame; 11. Cavity; 12. Feed hopper; 13. Discharge hopper; 14. Guide plate;

[0023] 2. Crushing assembly; 21. Rotating shaft; 22. Crushing roller; 23. Transmission gear; 24. First motor;

[0024] 3. Screening drum; 31. Rotating drive assembly; 311. Second motor; 312. Drive gear; 313. Ring gear; 32. Waste outlet; 321. Second collection box;

[0025] 4. Screening assembly; 41. Material baffle; 42. Discharge port; 43. Screening hole; 44. First collection box. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention.

[0028] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] See also Figure 1-3 The utility model provides a technical solution: a powder screening device, comprising: a frame 1, a cavity 11 is opened inside the frame 1, and a through hole connected to the cavity 11 is opened on the top wall of the frame 1, a feed hopper 12 is fixedly installed in the through hole, and a discharge hopper 13 connected to the cavity 11 is also provided on the side wall of the frame 1, a crushing assembly 2 is movably provided in the cavity 11 and is located below the feed hopper 12, and a guide plate 14 is provided in the cavity 11 below the crushing assembly 2, and the guide plate 14 is used to transport the crushed powder into the discharge hopper 13, and the outer side of the discharge hopper 13 is also rotatably connected to the screening drum 3, and a rotating drive assembly 31 movably connected to the screening drum 3 is provided in the frame 1, a plurality of screening assemblies 4 are arranged at equal intervals in the screening drum 3, and the plurality of screening assemblies 4 are arranged at one side of the discharge hopper 13 at intervals, and the plurality of screening assemblies 4 are used to screen out impurities in the powder.

[0032] Specifically, in this device, the guide plate 14 is set at an angle, and the height of its end close to the discharge hopper 13 is lower than the height of its end away from the discharge hopper 13. Therefore, when the crushed powder falls onto the guide plate 14, it will roll into the discharge hopper 13 along its inclined surface, thereby facilitating the transportation of the powder from the discharge hopper 13 to the screening drum 3 for subsequent screening processing.

[0033] Furthermore, the crushing assembly 2 includes: two rotating shafts 21 rotatably connected to the cavity 11, the two rotating shafts 21 are symmetrically arranged, and a crushing roller 22 is fixedly installed on the outer wall of each rotating shaft 21, and the feed hopper 12 is correspondingly arranged above the two crushing rollers 22. The same side ends of the two rotating shafts 21 extend to the outside of the frame 1 and are fixedly installed with transmission gears 23, and the two transmission gears 23 are engaged with each other. A first motor 24 is also fixedly installed on one side wall of the frame 1, and its output end is fixedly connected to the end of one of the rotating shafts 21.

[0034] Furthermore, the screening drum 3 is funnel-shaped, and its inner aperture size at the end away from the discharge hopper 13 is larger than the inner aperture size at the end close to the discharge hopper 13. A plurality of waste outlets 32 for discharging impurities are provided at equal angles around the outer wall of the end of the screening drum 3 away from the discharge hopper 13, and a second collection box 321 is also provided on one side of the frame 1 corresponding to the waste outlet 32.

[0035] Furthermore, the rotary drive assembly 31 includes: a second motor 311 fixedly installed in the cavity 11, on the output end of which the drive gear 312 is fixedly installed extending to the outside of the frame 1, one end of the screening drum 3 is sleeved on the outside of the discharge hopper 13, and a gear ring 313 is fixedly installed on its outer wall, and the gear ring 313 and the drive gear 312 are meshed and connected.

[0036] Specifically, in this device, in order to ensure the stability of the assembly between the screening drum 3 and the discharge hopper 13, an interlocking groove is opened around the inner peripheral wall of the end of the screening drum 3, and at the same time, an annular protrusion is integrally formed and fixedly installed on the outer peripheral wall of the discharge hopper 13, and the annular protrusion is embedded in the interlocking groove, thereby avoiding the separation of the screening drum 3 and the discharge hopper 13 during actual use (during rotation).

[0037] Furthermore, each group of screening components 4 includes: a material blocking component arranged around the inner circumferential wall of the screening drum 3, and the material blocking component has at least two material blocking plates 41 fixed to the inner wall of the screening drum 3, the two material blocking plates 41 are symmetrically arranged, and a discharge port 42 for powder flow is formed between the adjacent ends of the two material blocking plates 41, and a screening hole 43 is opened around the screening drum 3 on the side of each material blocking component close to the discharge hopper 13, and a first collection box 44 is also provided on one side of the frame 1 corresponding to multiple screening components 4.

[0038] Specifically, in the present device, a plurality of partitions may be provided in the first collecting box 44, and each partition is correspondingly provided below a group of screening components 4, thereby dividing the first collecting box 44 into a plurality of collecting chambers according to the plurality of screening components 4, and the aperture of the screening hole 43 corresponding to each screening component 4 is also slightly different, and the aperture of the screening hole 43 gradually decreases from the end close to the discharge hopper 13 to the end away from the discharge hopper 13, and then, when actually screening the powder, the powder can be finely screened according to the aperture size of the screening hole 43, so as to obtain the powder required for actual processing.

[0039] Furthermore, in every two adjacent screening assemblies 4 , the discharge ports 42 are staggered.

[0040] The working principle and use process of this utility model:

[0041] The powder is fed into the cavity 11 from the feed hopper 12 and falls between the two crushing rollers 22. Then, the output end of the first motor 24 drives the rotating shaft 21 on one side to rotate. The rotating shaft 21 on the one side controls the rotation of the rotating shaft 21 on the other side through two mutually meshing transmission gears 23. The two rotating shafts 21 rotate relative to each other, and the crushing rollers 22 crush the powder.

[0042] The crushed powder falls onto the guide plate 14 below and flows into the discharge hopper 13 along its inclined surface, and then flows into the screening drum 3 along the discharge hopper 13;

[0043] The powder passes through multiple screening components 4 in sequence along the inclined inner wall of the screening drum 3. At the same time, the output end of the second motor 311 controls the rotation of the screening drum 3 through the engagement of the driving gear 312 and the ring gear 313. After passing through multiple screening components 4, the powder is screened and falls along the screening holes 43 into the first collecting box 44 below. At the same time, impurities cannot pass through the screening holes 43 and roll to the end of the screening drum 3 away from the discharge hopper 13, and are discharged along the waste outlet 32 ​​into the second collecting box 321.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A powder screening device, characterized in that: include: A frame (1) is provided with a cavity (11) therein, and a through hole communicating with the cavity (11) is provided on the top wall of the frame (1), a feed hopper (12) is fixedly installed in the through hole, and a discharge hopper (13) communicating with the cavity (11) is also provided on the side wall of the frame (1); A crushing assembly (2) located below the feed hopper (12) is also movably provided in the cavity (11), and a guide plate (14) is provided in the cavity (11) below the crushing assembly (2), and the guide plate (14) is used to transport the crushed powder into the discharge hopper (13); The outer side of the discharge hopper (13) is also rotatably connected to a screening drum (3), and a rotating drive assembly (31) movably connected to the screening drum (3) is provided in the frame (1); A plurality of screening assemblies (4) are arranged at equal intervals in the screening cylinder (3), and a plurality of groups of the screening assemblies (4) are sequentially arranged at intervals on one side of the discharge hopper (13), and the plurality of screening assemblies (4) are used to screen out impurities in the powder.

2. A powder screening device according to claim 1, characterized in that: The crushing assembly (2) comprises: Two rotating shafts (21) are rotatably connected to the cavity (11), the two rotating shafts (21) are symmetrically arranged, and a crushing roller (22) is fixedly mounted on the outer wall of each rotating shaft (21), and the feed hopper (12) is correspondingly arranged above between the two crushing rollers (22); The ends on the same side of the two rotating shafts (21) extend to the outside of the frame (1) and are fixedly mounted with transmission gears (23). The two transmission gears (23) are meshed with each other. A first motor (24) is also fixedly mounted on a side wall of the frame (1), and its output end is fixedly connected to the end of one of the rotating shafts (21).

3. A powder screening device according to claim 1, characterized in that: The screening drum (3) is funnel-shaped, and the inner diameter of the end thereof away from the discharge hopper (13) is larger than the inner diameter of the end thereof close to the discharge hopper (13). A plurality of waste discharge ports (32) for discharging impurities are provided at equal angles on the outer peripheral wall of the end of the screening drum (3) away from the discharge hopper (13), and a second collection box (321) is provided on one side of the frame (1) corresponding to the waste discharge ports (32).

4. A powder screening device according to claim 1, characterized in that: The rotary drive assembly (31) comprises: a second motor (311) fixedly mounted in the cavity (11), with a driving gear (312) fixedly mounted on its output end extending to the outside of the frame (1); One end of the screening drum (3) is sleeved on the outside of the discharge hopper (13), and a gear ring (313) is fixedly mounted on the outer wall of the screening drum. The gear ring (313) is meshedly connected with the driving gear (312).

5. A powder screening device according to claim 1, characterized in that: Each set of the screening components (4) comprises: A material retaining member is disposed around the inner peripheral wall of the screening cylinder (3), and the material retaining member has at least two material retaining plates (41) fixed to the inner wall of the screening cylinder (3), the two material retaining plates (41) are symmetrically disposed, and a discharge port (42) for powder flow is formed between adjacent ends of the two material retaining plates (41); Each material retaining component is provided with a screening hole (43) surrounding the screening cylinder (3) on one side close to the discharge hopper (13), and a first collecting box (44) is provided on one side of the frame (1) corresponding to the plurality of screening assemblies (4).

6. A powder screening device according to claim 5, characterized in that: In each of the two adjacent screening assemblies (4), the discharge ports (42) are staggered.

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