A screen and crushing device

Abstract

The present invention provides a screen and a crushing device, the screen comprising a fixing part and a screen part, the fixing part being fixedly connected to the screen part, the fixing part being located on the peripheral side of the screen part, the screen part being arc-shaped, and being provided with a plurality of diamond-shaped holes, the directions of the plurality of diamond-shaped holes being consistent, the diamond-shaped holes being arranged in a plurality of rows, and the diamond-shaped holes in each row being staggered; the crushing device using the screen is not prone to material jamming, and has higher production efficiency.

Description

Technical Field

[0001] The present invention relates to the field of environmental protection, and in particular to a screen and a crushing device. Background Art

[0002] With the rapid development of my country's national economy, more and more waste is produced in production and life, and the problem of environmental pollution is becoming more and more serious. In order to improve environmental problems, people try to recycle recyclable items as much as possible. In the recycling process, large pieces of recyclables need to be crushed and then reprocessed. At present, a crusher is generally used to crush large pieces of recyclables. A screen is set at the discharge port of the crusher to ensure that the volume of the material coming out of the discharge port after crushing is uniform. However, the crusher is prone to screen jamming during the crushing process. The shape of the screen holes on traditional screens is generally set to be circular. The material is stuck in the screen holes and is difficult to pull out, resulting in jamming. The machine has to be stopped to manually pull out the material, which wastes time and seriously affects production efficiency. Summary of the Invention

[0003] Based on this, it is necessary to provide a screen and crushing device that is not easy to get stuck.

[0004] An embodiment of the present invention provides a screen, comprising a fixed portion and a screen portion, wherein the fixed portion is fixedly connected to the screen portion, the fixed portion is located on the circumferential side of the screen portion, the screen portion is arc-shaped, and a plurality of diamond-shaped holes are provided on the screen portion. The directions of the plurality of diamond-shaped holes are consistent, and the diamond-shaped holes are provided in multiple rows, and the diamond-shaped holes in each row are staggered.

[0005] Preferably, the screen portion comprises an arc-shaped plate, the diamond-shaped holes are provided on the arc-shaped plate, the acute angles of the diamond-shaped holes extend toward the circumference of the screen, and the obtuse angles of the diamond-shaped holes extend toward the axial direction of the screen.

[0006] Preferably, the screen portion comprises a plurality of wave-shaped bent strip plates, the plurality of strip plates are bent at the same angle, and the wave crests of adjacent strip plates are fixedly connected.

[0007] Preferably, the length of the diamond-shaped hole is 3-8 cm, and the width of the diamond-shaped hole is 2-5 cm.

[0008] Preferably, the fixing portion is provided on both sides of the screen portion, the fixing portion is bent in an axial direction away from the screen portion, and a plurality of bolt holes are provided on the fixing portion; the fixing portion and the screen portion are integrally formed.

[0009] Preferably, the fixing portion includes a first connecting portion and a second connecting portion, one side of the first connecting portion is fixedly connected to the screen portion, and the other side is fixedly connected to the second connecting portion; the first connecting portion and the second connecting portion are chamfered; the angle between the second connecting portion and the mirror surface of the screen is greater than the angle between the first connecting portion and the mirror surface of the screen portion.

[0010] Preferably, sealing plates are provided at both ends of the screen portion, and the sealing plates are integrally formed with the screen portion; the sealing plates are bent in a direction away from the central axis of the screen portion.

[0011] Preferably, the angle of the diamond-shaped hole toward the axial direction is an acute angle, and the size of the acute angle is 50-70°.

[0012] The present invention also provides a crushing device, comprising a crusher body and the screen described in any one of the above items; the crusher body comprises a crushing roller and a bracket, the crushing roller is rotatably connected to the bracket, a crushing knife is provided on the crushing roller, a discharge port is provided on the crusher body, the crushing knife is arranged close to the discharge port, the screen is fixed at the discharge port and covers the discharge port; there are multiple crushing knives, and multiple crushing knives are distributed on the crushing roller, the crushing roller includes a cutting part, and the end point of the acute angle of the diamond hole is close to the plane where the rotation trajectory of the cutting part is located.

[0013] Preferably, the endpoints of the acute angles of the diamond-shaped holes are located on the plane where the rotation trajectory of the cutting portion is located.

[0014] The screen and crusher of the present invention include a screen portion, on which diamond-shaped holes are provided. In actual use, the acute angles of the diamond-shaped holes match the rotation trajectory of the cutting portion, and the material stuck in the diamond-shaped holes can be pulled out during the rotation of the crushing knife, thereby reducing the frequency of material jamming and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and other purposes, features and advantages of the present invention will become more apparent by describing in more detail the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the accompanying drawings, and the drawings are not intentionally scaled to actual size, but rather are intended to illustrate the subject matter of the present invention.

[0016] Figure 1 This is an overall structural diagram of the screen according to a preferred embodiment of the present invention;

[0017] Figure 2 This is an overall structural diagram of a crushing device according to a preferred embodiment of the present invention;

[0018] Figure 3 for Figure 2 A is a partial enlargement of the figure. DETAILED DESCRIPTION

[0019] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings.

[0020] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element and integrated therewith, or there may be an intermediate element. The terms "mounted", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] As shown in Figures 1-3, an embodiment of the present invention provides a screen, including a fixed portion 2 and a screen portion 1, wherein the fixed portion 2 is fixedly connected to the screen portion 1. The fixed portion 2 is located on the circumference of the screen portion 1, and the screen portion 1 is arc-shaped. The screen portion 1 is provided with a plurality of diamond-shaped holes 11, and the directions of the plurality of diamond-shaped holes 11 are consistent. It should be noted that the consistency of the directions of the diamond-shaped holes 11 means that the lines connecting the acute angle endpoints of each diamond-shaped hole 11 are parallel to each other; that is, when the screen is installed on the crushing device, the acute angles of the diamond-shaped holes 11 are all set along the rotation direction of the crushing knife 31. The diamond-shaped holes 11 are arranged in multiple rows, and each row of diamond-shaped holes 11 is staggered, which can make the diamond-shaped holes 11 more dense. More diamond-shaped holes 11 can be set on the screen portion 1 of the same area, and the discharge speed will be faster. During the crushing process, the material stuck at the acute angle of the diamond-shaped hole 11 will be crushed again by the crushing knife 31 or torn out of the diamond-shaped hole 11, thereby reducing the frequency of material jamming and greatly improving production efficiency. Since the obtuse angle of the diamond hole 11 is relatively large, there is basically no problem of material jamming. Therefore, the problem of material jamming in the crushing device can be completely solved by only solving the problem of material jamming at the acute angle.

[0023] In a preferred embodiment, if Figure 1 As shown, the screen section 1 includes an arcuate plate 12 with diamond-shaped holes 11 formed therein. The acute angles of the diamond-shaped holes 11 extend circumferentially around the screen. Furthermore, the radial lines at the endpoints of the two acute angles of the same diamond-shaped hole 11 (the perpendicular line from the acute angle endpoint to the centerline of the screen section) lie on the same tangent plane of the screen section. The obtuse angles of the diamond-shaped holes 11 extend axially along the screen section. Arcuate plate 12 is circular. When the screen is installed on the crushing device, the distance from any point on the arcuate plate 12 to the centerline of the crushing roller 3 is equal, ensuring that material is not accumulated and is fully crushed.

[0024] In a preferred embodiment, if Figure 1 As shown, the screen portion 1 comprises a plurality of wavy, curved strips 13. Each strip 13 bends at the same angle, and adjacent strips 13 are fixedly connected at their wave crests. The strips 13 preferably bend at an angle of 50°-70°. After numerous tests and practical applications, it has been determined that a 60° bend minimizes material jamming and maximizes production efficiency. Furthermore, the bends of the strips 13 are chamfered to prevent jamming.

[0025] In a preferred embodiment, if Figure 1 As shown, the length of the diamond hole 11 is 3-8 cm, and the width of the diamond hole 11 is 2-5 cm. In practice, especially in the crushing process of waste plastics, the length of the diamond hole 11 is also 4 cm, 5 cm, and 6 cm, and the width of the diamond hole 11 is 3 cm or 4 cm, which has the most obvious effect of screening without material jamming.

[0026] In a preferred embodiment, if Figure 1 As shown, the fixing portion 2 is provided on both sides of the screen portion 1. In this embodiment, the two sides of the screen portion 1 are the two axial sides of the arc-shaped plate 12. In other embodiments, the fixing portion 2 can also be provided in the radial direction of the arc-shaped plate 12. The fixing portion 2 is bent in a direction away from the axial direction of the screen portion 1. The fixing portion 2 is provided with a plurality of bolt holes 21 for fixing the screen to other equipment. The fixing portion 2 is integrally formed with the screen portion 1, which makes the structure more stable and easier to process.

[0027] In a preferred embodiment, if Figure 1 As shown, the fixed portion 2 includes a first connecting portion 22 and a second connecting portion 23. One side of the first connecting portion 22 is fixedly connected to the screen portion 1, and the other side is fixedly connected to the second connecting portion 23. The first connecting portion 22 and the second connecting portion 23 are chamfered due to the requirements of the processing technology. The chamfer is to remove burrs on the parts caused by machining and to facilitate the assembly of parts. The angle between the second connecting portion 23 and the mirror surface of the screen is greater than the angle between the first connecting portion 22 and the mirror surface of the screen portion 1. The two angles are co-ordinate angles, and the angle between the second connecting portion 23 and the mirror surface of the screen portion 1 is the angle away from the screen surface. The mirror surface refers to the surface formed by the part of the arc centerline of the arc plate 12 and its axial direction.

[0028] In a preferred embodiment, if Figure 1 As shown, sealing plates 14 are provided at both ends of the screen portion 1. The sealing plates 14 are integrally formed with the screen portion 1 and are bent in a direction away from the central axis of the screen portion 1. The bending angle of the sealing plate 14 matches its connecting piece.

[0029] In a preferred embodiment, if Figure 1As shown, the angle of the diamond-shaped hole 11 in the axial direction is acute, with a magnitude of 50-70°. After numerous tests and practices, it was determined that when the strip plate 13 is bent at an angle of 60°, the frequency of material jamming is minimized and production efficiency is maximized. Furthermore, the bend of the strip plate 13 is chamfered to prevent material jamming.

[0030] The present invention also provides a crushing device comprising a crusher body and the aforementioned screen. The crusher body comprises a crushing roller 3 and a bracket 4. The crushing roller 3 is rotatably connected to the bracket 4. The crushing roller 3 is provided with a crushing blade 31. The crusher body is provided with a discharge port 5. The crushing blade 31 is positioned near the discharge port 5. The screen is fixed to the discharge port 5 and covers the discharge port 5. Multiple crushing blades 31 are provided, distributed on the crushing roller 3. The acute-angled endpoints of the diamond-shaped holes 11 are close to the plane of the rotation trajectory of the cutting portion.

[0031] In a preferred embodiment, the acute angle endpoints of the diamond-shaped holes 11 are located on the plane of the cutting portion's rotation trajectory. Numerous tests and practices have shown that when the acute angle endpoints of the diamond-shaped holes 11 are located on the plane of the cutting portion's rotation trajectory, the crushing blade 31 is more effective at removing material stuck in the diamond-shaped holes 11, minimizing the frequency of material jams and maximizing production efficiency.

[0032] The screen and crusher of the present invention include a screen portion 1, on which diamond-shaped holes 11 are provided. In actual use, the acute angle of the diamond-shaped holes 11 matches the rotation trajectory of the cutting portion. During the rotation of the crushing knife 31, the material stuck in the diamond-shaped holes 11 can be pulled out, thereby reducing the frequency of material jamming and improving production efficiency.

[0033] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The above embodiments merely represent specific implementation methods of the invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be based on the appended claims.

Claims

1. A crushing device, characterized in that: The crusher body comprises a crushing roller and a bracket, the crushing roller is rotatably connected to the bracket, the crushing roller is provided with a crushing knife, the crusher body is provided with a discharge port, the crushing knife is arranged close to the discharge port, the screen is fixed at the discharge port and covers the discharge port; the screen comprises a fixing part and a screen part, the fixing part is fixedly connected to the screen part, the fixing part is located on the peripheral side of the screen part, the screen part is arc-shaped, a plurality of diamond-shaped holes are provided on the screen part, the directions of the plurality of diamond-shaped holes are consistent, the diamond-shaped holes are arranged in multiple rows, and the diamond-shaped holes in each row are staggered; the crushing knives are provided in plurality, and the plurality of crushing knives are distributed in the crushing On the roller, the crushing roller includes a cutting part, and the endpoints of the acute angles of the diamond holes are located on the plane where the rotation trajectory of the cutting part is located; the screen part includes an arc plate, which is a circular arc plate. When the screen is installed on the crushing device, the distance between any point on the arc plate and the central axis of the crushing roller is equal; the diamond holes are opened on the arc plate, the acute angles of the diamond holes extend toward the circumference of the screen, and the obtuse angles of the diamond holes extend toward the axial direction of the screen. The length of the diamond holes is 3-8 cm and the width is 2-5 cm; the screen part includes a plurality of wavy bent strip plates, and the bending angles of the plurality of strip plates are the same. The crests of adjacent strip plates are fixedly connected, and the angles of the diamond holes facing the circumferential direction are acute angles.

2. The crushing device according to claim 1, characterized in that The fixing part includes a first connecting part and a second connecting part, one side of the first connecting part is fixedly connected to the screen part, and the other side is fixedly connected to the second connecting part; the first connecting part and the second connecting part are chamfered; the angle between the second connecting part and the mirror surface of the screen is greater than the angle between the first connecting part and the mirror surface of the screen part.

3. The crushing device according to claim 1, characterized in that Sealing plates are provided at both ends of the screen portion, and the sealing plates are integrally formed with the screen portion; the sealing plates are bent in a direction away from the central axis of the screen portion.

4. The crushing device according to claim 1, characterized in that The acute angle of the diamond-shaped hole is 50-70°.

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