A PVC granule screening device

Abstract

The present application relates to the technical field of screening devices, in particular to a PVC granule screening device, which comprises a screening tank, a vibration device is arranged at the bottom of the screening tank, a feed hopper is arranged at the top of the screening tank, a first screen and a second screen are fixed on the inner side wall of the screening tank, there is a gap between the first screen and the second screen, the first screen and the second screen are both inclined, and the first screen and the second screen are both flexible metal meshes. The present application has the beneficial effect of improving the screening efficiency of the screening device.

Description

Technical Field

[0001] The present application relates to the technical field of screening devices, and in particular to a PVC granule screening device. Background Art

[0002] During the production and processing of plastic particles such as PVC particles, a corresponding screening device is required to classify the PVC particles according to different particle sizes for subsequent processing. Therefore, a vertical screening device is used to screen the PVC particles, such as a vertical masterbatch screening device with a publication number of CN206997054U. It solves the existing technical problems and has the advantages of small footprint and good screening effect. However, the vertical masterbatch screening device still has the following disadvantages in actual use:

[0003] Although the above-mentioned screening device can achieve screening, it only screens by vibration. The vibration amplitude of the PVC particles is not large enough, resulting in low screening efficiency. In addition, large particles of plastic can easily clog the mesh during the screening process, affecting the falling of small particles of plastic. Therefore, there is still room for improvement. Utility Model Content

[0004] In order to improve the screening efficiency of the screening device, the present application provides a PVC granule screening device.

[0005] The present application provides a PVC pellet screening device that adopts the following technical solution:

[0006] A PVC granule screening device comprises a screening tank, a vibration device is arranged at the bottom of the screening tank, a feed hopper is arranged at the top of the screening tank, a first screen and a second screen are fixed on the inner side wall of the screening tank, there is a gap between the first screen and the second screen, the first screen and the second screen are both arranged at an angle, and the first screen and the second screen are both flexible metal meshes.

[0007] By adopting the above technical solution, the vibration device vibrates to drive the screening tank to vibrate. When the screening tank vibrates, the first screen and the second screen vibrate synchronously. The first screen and the second screen made of flexible metal will deform during the vibration process, and drive the PVC particles to shake, which plays a screening role. At the same time, the mesh can be prevented from being blocked during the shaking process. The PVC particles will slide along the inclined direction of the first and second screens. During the sliding process, the PVC particles will more easily enter the mesh of the first and second screens and be better screened, thereby improving the screening efficiency of the PVC particles.

[0008] Preferably, an air outlet is opened on the side wall of the screening tank, and an air blower is arranged on the side wall of the screening tank, and the air blower is used to blow air into the screening tank.

[0009] By adopting the above technical solution, the dust in the incoming PVC particles is blown out from the air outlet when the air blower blows air, which plays a role of preliminary filtration.

[0010] Preferably, an air pipe is fixed on the screening tank, and the air pipe is used to blow air to the first screen and the second screen. A discharge pipe is fixed on the screening tank, and the discharge pipe connects the inside of the screening tank with the outside.

[0011] By adopting the above technical solution, the air supply pipe blows air to the surface of the first screen and the second screen, and the PVC particles that have not been screened are blown toward the discharge pipe and blown out from the discharge pipe, thereby further reducing the occurrence of PVC particles blocking the mesh and improving the screening efficiency of PVC particles.

[0012] Preferably, a material storage box is provided on the screening tank, and the material storage box is snap-fitted with the screening tank.

[0013] By adopting the above technical solution, the screened PVC granules fall into the storage box, which is convenient for subsequent operators to take out the materials.

[0014] Preferably, the mesh size of the first sieve is larger than the mesh size of the second sieve.

[0015] By adopting the above technical solution, the mesh aperture of the first screen is larger than the mesh aperture of the second screen, thereby realizing step-by-step screening of PVC particles and improving the screening effect.

[0016] Preferably, the first screen and the second screen are arranged in opposite inclination directions.

[0017] By adopting the above technical solution, the inclination directions of the first screen and the second screen are set in opposite directions, so that the PVC particles can slide on the first screen and fall onto the second screen and then slide on the second screen again, which is conducive to further screening of the PVC particles.

[0018] Preferably, a handle is provided on the storage box.

[0019] By adopting the above technical solution, the setting of the handle makes it easier for the operator to apply force and to open the material storage box to take out materials.

[0020] Preferably, the vibration device comprises a vibration motor and a spring, and the vibration motor and the spring are both fixed to the bottom of the screening tank.

[0021] By adopting the above technical solution, the vibration of the vibration motor drives the screening tank to vibrate, and the spring plays a buffering and supporting role during the vibration of the screening tank, so that the screening tank vibrates more smoothly.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: the vibration device vibrates to drive the screening tank to vibrate, the first screen and the second screen vibrate synchronously when the screening tank vibrates, the first screen and the second screen made of flexible metal will deform during the vibration process, and drive the PVC particles to shake, playing a screening role, and at the same time, it can avoid clogging of the mesh during the shaking process. The PVC particles will slide along the inclined direction of the first screen and the second screen, and the PVC particles will more easily enter the mesh of the first screen and the second screen during the sliding process, so that they can be better screened, thereby improving the screening efficiency of the PVC particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the PVC colloid particle screening device according to an embodiment of the present application.

[0024] Figure 2 It is a cross-sectional view of a PVC colloid particle screening device according to an embodiment of the present application.

[0025] Explanation of the accompanying drawings: 1. Screening tank; 2. Vibration device; 21. Vibration motor; 22. Spring; 3. Feed hopper; 4. First screen; 5. Second screen; 6. Air outlet; 7. Air blower; 8. Air pipe; 9. Discharge pipe; 10. Storage box; 11. Handle. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-2 This application is described in further detail.

[0027] The present application embodiment discloses a PVC colloid particle screening device. Figure 1 and Figure 2 A PVC colloid screening device comprises a screening tank 1, a vibration device 2 is arranged at the bottom of the screening tank 1, and the vibration device 2 is used to generate vibration so as to drive the screening tank 1 to vibrate. A feed hopper 3 is arranged at the top of the screening tank 1, and the feed hopper 3 is arranged in an inverted cone shape. The material to be screened is poured into the screening tank 1 from the feed hopper 3. A first screen 4 and a second screen 5 are fixed on the inner wall of the screening tank 1. There is a gap between the first screen 4 and the second screen 5. The mesh aperture of the first screen 4 is larger than the mesh aperture of the second screen 5. After the PVC colloid is screened by the first screen 4, the PVC colloid with a mesh aperture smaller than the mesh aperture of the first screen 4 falls on the second screen 5, and the PVC colloid with a mesh aperture larger than the mesh aperture of the first screen 4 stays on the first screen 4. The second screen 5 continues to screen the PVC colloid, and the PVC colloid with a mesh aperture smaller than the mesh aperture of the second screen 5 falls on the bottom of the screening tank 1, and the PVC colloid with a mesh aperture larger than the mesh aperture of the second screen 5 stays on the second screen 5.

[0028] The first screen 4 and the second screen 5 are both flexible metal meshes. When the screening tank 1 vibrates, the first screen 4 and the second screen 5 vibrate synchronously. The first screen 4 and the second screen 5 made of flexible metal will deform during the vibration process, and drive the PVC particles to shake, which plays a screening role. At the same time, the mesh blockage can be avoided during the shaking process. The first screen 4 and the second screen 5 are both inclined, and the inclination directions of the first screen 4 and the second screen 5 are opposite. When the PVC particles fall on the first screen 4 and the second screen 5, they will slide along the inclination direction of the first screen 4 and the second screen 5. During the sliding process, the PVC particles will more easily enter the mesh of the first screen 4 and the second screen 5 and be better screened, thereby improving the screening efficiency of the PVC particles.

[0029] Furthermore, a plurality of air outlet holes 6 are provided on the upper half side wall of the screening tank 1, and the plurality of air outlet holes 6 are distributed in an array. An air blower 7 is fixed on the other half side wall of the screening tank 1, and the air blower 7 is used to blow air into the screening tank 1. The PVC particles enter the screening tank 1 from the feed hopper 3, and the air blower 7 blows out the dust in the entering PVC particles from the air outlet holes 6 when blowing air, which plays a role of preliminary filtration. An air supply pipe 8 is fixed on the screening tank 1, and the air supply pipe 8 includes two branch pipes, one end of the two branch pipes is connected and communicated with the air blower 7, and the other end of the branch pipe extends into the screening tank 1, and the ends of the two branch pipes extending into the screening tank 1 are respectively located above the first screen 4 and the second screen 5. A discharge pipe 9 is fixed on the screening tank 1, and the discharge pipe 9 connects the inside of the screening tank 1 with the outside. The air delivery pipe 8 blows air to the surface of the first screen 4 and the second screen 5, and blows the PVC particles that have not been screened and remain on the first screen 4 and the second screen 5 to the discharge pipe 9, and the PVC particles that have not been screened are blown out from the discharge pipe 9. This reduces the occurrence of PVC particles that remain on the first screen 4 and the second screen 5 blocking the mesh.

[0030] Furthermore, a storage box 10 is provided on the screening tank 1, and the storage box 10 is engaged with the screening tank 1, and the outer wall of the storage box 10 is arranged flush with the outer wall of the screening tank 1, and the screened PVC particles will fall into the storage box 10. A handle 11 is fixed on the storage box 10, and the handle 11 is arranged in a U shape. The operator can pull out the storage box 10 by pulling the handle 11 to take out the screened PVC particles, so that the operator can take the material conveniently.

[0031] Specifically, the vibration device 2 includes a vibration motor 21 and a spring 22, both of which are vertically arranged and fixed to the bottom of the screening tank 1. The vibration of the vibration motor 21 drives the screening tank 1 to vibrate, and the spring 22 plays a buffering and supporting role during the vibration of the screening tank 1, so that the screening tank 1 maintains a stable vibration and is not easy to shake arbitrarily, and the elastic force of the spring 22 can also give the screening tank 1 a certain thrust to assist the screening tank 1 in vibrating.

[0032] The implementation principle of a PVC pellet screening device in the embodiment of the present application is as follows:

[0033] The vibration motor 21 vibrates to drive the screening tank 1 to vibrate. The vibration of the screening tank 1 drives the first screen 4 and the second screen 5 to vibrate synchronously. The first screen 4 and the second screen 5 are both flexible metal meshes, and the mesh aperture of the first screen 4 is larger than the mesh aperture of the second screen 5. The first screen 4 and the second screen 5 will deform during the vibration process, and drive the PVC particles to shake, which plays a screening role. At the same time, the mesh can be prevented from being blocked during the shaking process. The air pipe 8 blows air to the first screen 4 and the second screen 5, and blows the PVC particles that have not been screened and remain on the first screen 4 and the second screen 5 to the discharge pipe 9. The first screen 4 and the second screen 5 are both inclined, so that the unscreened PVC particles can slide better to the discharge pipe 9, and the unscreened PVC particles are blown out from the discharge pipe 9. The screened PVC particles fall into the storage box 10, and the operator can pull the storage box 10 out by pulling the handle 11 to take the screened PVC particles.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A PVC pellet screening device, characterized in that: The invention comprises a screening tank (1), wherein a vibration device (2) is arranged at the bottom of the screening tank (1), a feed hopper (3) is arranged at the top of the screening tank (1), a first screen (4) and a second screen (5) are fixed on the inner side wall of the screening tank (1), a gap exists between the first screen (4) and the second screen (5), the first screen (4) and the second screen (5) are arranged at an angle, and the first screen (4) and the second screen (5) are both flexible metal meshes; an air supply pipe (8) is fixed on the screening tank (1), and the air supply pipe (8) is used to blow air to the first screen (4) and the second screen (5); a discharge pipe (9) is fixed on the screening tank (1), and the discharge pipe (9) connects the inside of the screening tank (1) with the outside.

2. A PVC granule screening device according to claim 1, characterized in that: An air outlet hole (6) is provided on the side wall of the screening tank (1), and an air blower (7) is provided on the side wall of the screening tank (1), and the air blower (7) is used to blow air into the screening tank (1).

3. A PVC granule screening device according to claim 1, characterized in that: The screening tank (1) is provided with a material storage box (10), and the material storage box (10) is snap-fitted with the screening tank (1).

4. A PVC granule screening device according to claim 1, characterized in that: The mesh size of the first sieve (4) is larger than the mesh size of the second sieve (5).

5. The PVC granule screening device according to claim 1, characterized in that: The first screen (4) and the second screen (5) are arranged in opposite inclination directions.

6. A PVC granule screening device according to claim 3, characterized in that: The material storage box (10) is provided with a handle (11).

7. A PVC granule screening device according to claim 1, characterized in that: The vibration device (2) comprises a vibration motor (21) and a spring (22), and the vibration motor (21) and the spring (22) are both fixed to the bottom of the screening tank (1).

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