A raw material screening device

Abstract

The utility model relates to the technical field of plastic raw material screening, and discloses a raw material screening device, including a screening box, a collecting hopper is integrally formed at the bottom of the screening box, and a feeding hopper is installed at the top of the screening box, the bottom end of the collecting hopper is connected to a discharge valve, the interior of the screening box is provided with a first inclined block and a second inclined block symmetrically distributed, and a screening cavity is formed between the first inclined block and the second inclined block; a cleaning mechanism for cleaning the screening cavity is provided on the screening box; the utility model, through the setting of the cleaning mechanism, utilizes a plurality of air supply channels to blow air into the screening cavity when cleaning the screening cavity, so that the plastic raw material remaining in the screening cavity is discharged through the discharge valve and the discharge pipe, thereby realizing the cleaning of the screening cavity and avoiding the residual plastic raw material in the screening cavity, thereby not only preventing scaling inside the screening equipment, but also reducing the loss of raw materials, which is beneficial to the screening processing of raw materials.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic raw material screening, in particular to a raw material screening device. Background Art

[0002] Plastic raw materials refer to materials used to manufacture plastic products, mainly including polyethylene, polypropylene, polyvinyl chloride, polystyrene, etc. When producing plastic raw materials, screening devices are generally required to screen the raw materials to facilitate subsequent processing of the raw materials and improve production efficiency.

[0003] For example, in the Chinese patent with the announcement number CN221212401U, a raw material screening device for plastic raw material production is disclosed. The raw materials in the screening cylinder can be swept by the setting of rotating rollers, connecting rods and strip brushes. At the same time, when the vibration motor is in operation, the vibration motor, spring, stabilizing plate and movable groove cooperate with each other to make the end of the screening cylinder close to the discharge hopper shake, thereby increasing the screening speed of the raw materials, greatly improving the screening efficiency, and avoiding the clogging of the screen holes, which is conducive to promotion and use. However, after the above-mentioned screening equipment screens the raw materials, it cannot clean the inside, which easily leads to residual raw materials inside the screening equipment, which not only causes scaling inside the screening equipment, but also increases the loss of raw materials, which is not conducive to the screening processing of raw materials. Utility Model Content

[0004] The utility model provides a raw material screening device to solve the problem that the interior of the existing screening equipment cannot be cleaned after the raw materials are screened.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a raw material screening device, comprising a screening box, a collecting hopper is integrally formed at the bottom of the screening box, and a feeding hopper is installed at the top of the screening box, a discharge valve is connected to the bottom end of the collecting hopper, a symmetrically distributed first inclined block and a second inclined block are arranged inside the screening box, and a screening cavity is formed between the first inclined block and the second inclined block, a discharge pipe connected to the screening cavity is connected to one side of the screening box, and a stirring structure is arranged on the screening box, a feeding channel connecting the feeding hopper with the screening cavity is opened in the first inclined block, and equidistantly distributed discharge holes are opened on the second inclined block;

[0006] The screening box is provided with a cleaning mechanism for cleaning the screening cavity, and the cleaning mechanism includes an air distribution duct and multiple air supply channels opened on the top of the first inclined block, and a blowing component arranged on the top of the screening box. The multiple air supply channels connect the air distribution duct with the screening cavity, and the blowing component blows air into the screening cavity through the air distribution duct and the multiple air supply channels.

[0007] Preferably, the blowing component includes an installation box fixed on the top of the screening box, a fan is installed inside the installation box, an air inlet is opened on one side of the installation box, and a pipe connected to the air duct is connected to the side of the installation box opposite to the air inlet.

[0008] Preferably, a dustproof plate is inserted in the installation box, and a dustproof net is embedded in the middle of the dustproof plate, a mortise block is installed at the bottom end of the dustproof plate, and a mortise groove matching the mortise block is opened at the inner bottom of the installation box.

[0009] Preferably, positioning pins are installed on both sides of the inner wall of the mortise and tenon groove, and positioning grooves for inserting the positioning pins are opened on both sides of the mortise and tenon block.

[0010] Preferably, the stirring structure includes a shell and a first motor installed on the side of the screening box opposite to the discharge pipe, and a rotating shaft rotatably installed in the screening chamber, the shell cover is arranged on the outside of the first motor, and a plurality of stirring plates are installed on the rotating shaft.

[0011] Preferably, the screening chamber is in a truncated cone shape, and a brush is provided on one side of each of the plurality of stirring plates, and the brush can contact the inner wall of the screening chamber.

[0012] Preferably, a distribution structure is also provided in the feed channel, and the distribution structure includes a roller rotatably installed inside the feed channel, a plurality of dispersion blades are installed on the outer wall of the roller, and a second motor is installed on one side of the screening box, and the second motor is used to drive the roller to rotate.

[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0014] (1) Through the setting of the cleaning mechanism, when cleaning the screening chamber, multiple air supply channels are used to blow air into the screening chamber, so that the residual plastic raw materials in the screening chamber are discharged through the discharge valve and the discharge pipe, thereby achieving the cleaning of the screening chamber and avoiding the residual plastic raw materials in the screening chamber. This can not only prevent the scaling inside the screening equipment, but also reduce the loss of raw materials, which is beneficial to the screening processing of raw materials;

[0015] (2) By setting the distribution structure, the raw materials falling into the feed channel can be dispersed, so that the raw materials intermittently fall into the screening chamber, and the raw materials can be stirred at the same time, thereby preventing the feed from being blocked due to excessive addition of raw materials at one time, facilitating the rapid addition of raw materials, and avoiding the agglomeration of raw materials, which is beneficial to the screening of raw materials and improves the screening efficiency of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is one of the structural schematic diagrams of the utility model;

[0018] Figure 2 It is a cross-sectional view of the utility model;

[0019] Figure 3 This is the second structural diagram of the utility model;

[0020] Figure 4 For this utility model Figure 2 A in the enlarged view;

[0021] Figure 5 For this utility model Figure 4 The enlarged view of point B in the figure;

[0022] In the figure: 1. screening box; 2. collecting hopper; 3. discharge valve; 4. discharge pipe; 5. feeding hopper; 6. stirring structure; 61. shell; 62. first motor; 63. rotating shaft; 64. stirring plate; 65. brush; 7. cleaning mechanism; 71. installation box; 72. fan; 73. air distribution duct; 74. air supply channel; 75. air inlet; 76. dustproof plate; 77. dustproof net; 78. mortise and tenon block; 79. positioning pin; 8. first inclined block; 9. second inclined block; 10. drop hole; 11. feed channel; 12. dispersion blades; 13. roller; 14. second motor. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The utility model provides Figure 1-Figure 5A raw material screening device shown in the figure comprises a screening box 1, a collecting hopper 2 is integrally formed at the bottom of the screening box 1, a feeding hopper 5 is installed at the top of the screening box 1, a discharge valve 3 is connected to the bottom of the collecting hopper 2, a first inclined block 8 and a second inclined block 9 are symmetrically arranged inside the screening box 1, and a screening cavity is formed between the first inclined block 8 and the second inclined block 9, a discharge pipe 4 connected to the screening cavity is connected to one side of the screening box 1, and a stirring structure 6 is arranged on the screening box 1, a feed channel 11 connecting the feeding hopper 5 with the screening cavity is opened in the first inclined block 8, and discharge holes 10 distributed at equal distances are opened on the second inclined block 9;

[0025] The screening box 1 is provided with a cleaning mechanism 7 for cleaning the screening cavity, and the cleaning mechanism 7 includes an air duct 73 and a plurality of air supply channels 74 opened at the top of the first inclined block 8, and a blowing component arranged at the top of the screening box 1. The plurality of air supply channels 74 connect the air duct 73 with the screening cavity, and the blowing component blows air into the screening cavity through the air duct 73 and the plurality of air supply channels 74.

[0026] Specifically, Figure 1-Figure 3 As shown, the blowing component includes an installation box 71 fixed on the top of the screening box 1, a fan 72 is installed inside the installation box 71, and an air inlet hole 75 is opened on one side of the installation box 71. A pipe connected to the air duct 73 is connected to the side of the installation box 71 relative to the air inlet hole 75.

[0027] Specifically, Figure 1-Figure 3 As shown, the stirring structure 6 includes a shell 61 and a first motor 62 installed on the side of the screening box 1 relative to the discharge pipe 4, and a rotating shaft 63 rotatably installed in the screening chamber. The shell 61 covers the outside of the first motor 62, and a plurality of stirring plates 64 are installed on the rotating shaft 63.

[0028] When the plastic raw material is screened, the plastic raw material is first added into the screening box 1 through the feeding hopper 5, and then the plastic raw material falls into the screening chamber through the feeding channel 11. At this time, the rotating shaft 63 is driven to rotate by the first motor 62, and then the rotating shaft 63 drives the stirring plate 64 to stir the plastic raw material in the screening chamber, so that the plastic raw material with smaller particles falls into the collecting hopper 2 through the drop hole 10 on the second inclined block 9 and is discharged through the discharge valve 3, while the plastic raw material with larger particles is discharged from the discharge pipe 4 under the guidance of the second inclined block 9, thereby realizing the screening of the plastic raw material;

[0029] After the screening is completed, the external air can be sucked into the installation box 71 through the air inlet 75 by the fan 72 in the installation box 71, and then the air is input into the air distribution duct 73 through the pipeline, and then the air is diverted into multiple air supply channels 74 through the air distribution duct 73, so that the air is blown into the screening chamber through the multiple air supply channels 74, so that the residual plastic raw materials in the screening chamber are discharged through the discharge valve 3 and the discharge pipe 4, thereby realizing the cleaning of the inside of the screening chamber, avoiding the residual plastic raw materials in the screening chamber, and then preventing the scaling inside the screening chamber, which is beneficial to ensure the subsequent use of the screening chamber.

[0030] Furthermore, if Figure 2 and Figure 4 As shown, a dustproof plate 76 is also inserted into the installation box 71, and a dustproof net 77 is embedded in the middle of the dustproof plate 76. A mortise block 78 is installed at the bottom end of the dustproof plate 76. A mortise groove matching the mortise block 78 is opened at the inner bottom of the installation box 71. The dustproof plate 76 is located on the air inlet side of the fan 72.

[0031] When the fan 72 draws in external air through the air inlet 75, the dustproof plate 76 can filter the air through the dustproof net 77 in the middle to prevent dust from being sucked in together, which is beneficial to ensure the normal use of the fan 72. When the dustproof net 77 needs to be cleaned, the dustproof plate 76 can be pulled upward so that the mortise block 78 is pulled out of the mortise groove until the dustproof plate 76 is pulled out of the installation box 71. The dustproof net 77 is then cleaned. After cleaning, the dustproof plate 76 is inserted into the installation box 71 again so that the mortise block 78 is inserted into the mortise groove, so as to install and fix the dustproof plate 76 and the installation box 71, which is convenient for the subsequent use of the dustproof plate 76.

[0032] Further, in order to facilitate the installation of the dustproof plate 76, as Figure 4 and Figure 5 As shown, positioning pins 79 are installed on both sides of the inner wall of the mortise groove, and positioning grooves for the positioning pins 79 to be inserted are opened on both sides of the mortise block 78.

[0033] When the mortise block 78 is inserted into the mortise groove, the positioning pin 79 is inserted into the positioning groove to quickly position the mortise block 78 and the mortise groove, which is beneficial to the stable installation of the dustproof plate 76.

[0034] Furthermore, in this embodiment, in order to facilitate the cleaning of the screening chamber, Figure 2 As shown, the screening chamber is in a truncated cone shape, and a brush 65 is disposed on one side of each of the plurality of stirring plates 64 , and the brush 65 can contact the inner wall of the screening chamber.

[0035] When the stirring plate 64 stirs the raw materials in the screening chamber, the brush 65 can clean the inner wall of the screening chamber to avoid residual raw material debris on the inner wall of the screening chamber, which is conducive to the discharge of the raw materials.

[0036] In addition, in one embodiment, if Figure 2 As shown, a distribution structure is also provided in the feed channel 11, and the distribution structure includes a roller 13 rotatably installed inside the feed channel 11, and a plurality of dispersion blades 12 are installed on the outer wall of the roller 13. A second motor 14 is installed on one side of the screening box 1, and the second motor 14 is used to drive the roller 13 to rotate. The second motor 14 can adopt a reduction motor to drive the dispersion blades 12 to rotate slowly.

[0037] When the raw materials in the feeding hopper 5 fall into the feeding channel 11, the second motor 14 can be used to drive the roller 13 to rotate, and then the roller 13 drives the dispersion blades 12 to rotate to disperse the raw materials falling into the feeding channel 11, so that the raw materials intermittently fall into the screening chamber, and the raw materials can be stirred at the same time, thereby not only preventing too much raw material from being added at one time, which may easily lead to feed blockage, facilitating the rapid addition of raw materials, but also avoiding raw material agglomeration, which is beneficial to the screening of raw materials and improves the screening efficiency of raw materials.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A raw material screening device, comprising a screening box (1), characterized in that: The bottom of the screening box (1) is integrally formed with a collecting hopper (2), and a feeding hopper (5) is installed at the top of the screening box (1); the bottom end of the collecting hopper (2) is connected to a discharge valve (3); the interior of the screening box (1) is provided with a first inclined block (8) and a second inclined block (9) which are symmetrically distributed, and a screening cavity is formed between the first inclined block (8) and the second inclined block (9); one side of the screening box (1) is connected with a discharge pipe (4) which is connected to the screening cavity, and a stirring structure (6) is provided on the screening box (1); a feeding channel (11) which connects the feeding hopper (5) with the screening cavity is provided in the first inclined block (8), and discharge holes (10) which are equidistantly distributed are provided on the second inclined block (9); The screening box (1) is provided with a cleaning mechanism (7) for cleaning the screening chamber, and the cleaning mechanism (7) comprises an air distribution duct (73) and a plurality of air supply ducts (74) opened at the top of the first inclined block (8), and a blowing component arranged at the top of the screening box (1), the plurality of air supply ducts (74) connecting the air distribution duct (73) with the screening chamber, and the blowing component blows air into the screening chamber through the air distribution duct (73) and the plurality of air supply ducts (74).

2. A raw material screening device according to claim 1, characterized in that: The air blowing component comprises an installation box (71) fixed on the top of the screening box (1), a fan (72) is installed inside the installation box (71), and an air inlet hole (75) is opened on one side of the installation box (71), and a pipe connected to the air distribution duct (73) is connected to the side of the installation box (71) opposite to the air inlet hole (75).

3. A raw material screening device according to claim 2, characterized in that: A dustproof plate (76) is also inserted into the installation box (71), and a dustproof net (77) is embedded in the middle of the dustproof plate (76). A mortise and tenon block (78) is installed at the bottom end of the dustproof plate (76), and a mortise and tenon groove matching the mortise and tenon block (78) is opened at the inner bottom of the installation box (71).

4. A raw material screening device according to claim 3, characterized in that: Positioning pins (79) are installed on both sides of the inner wall of the mortise and tenon groove, and positioning grooves for inserting the positioning pins (79) are opened on both sides of the mortise and tenon block (78).

5. A raw material screening device according to claim 1, characterized in that: The stirring structure (6) comprises a shell (61) and a first motor (62) installed on the side of the screening box (1) opposite to the discharge pipe (4), and a rotating shaft (63) rotatably installed in the screening chamber, wherein the shell (61) covers the outside of the first motor (62), and a plurality of stirring plates (64) are installed on the rotating shaft (63).

6. A raw material screening device according to claim 5, characterized in that: The screening chamber is in a truncated cone shape, and a brush (65) is provided on one side of each of the plurality of stirring plates (64), and the brush (65) can contact the inner wall of the screening chamber.

7. A raw material screening device according to claim 1, characterized in that: A distribution structure is also provided in the feed channel (11), and the distribution structure comprises a roller (13) rotatably mounted inside the feed channel (11), a plurality of dispersion blades (12) are mounted on the outer wall of the roller (13), and a second motor (14) is mounted on one side of the screening box (1), and the second motor (14) is used to drive the roller (13) to rotate.

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