A quick-mounting stepped screen

Abstract

The utility model provides a kind of fast installation's grading screen, including bearing chassis, the upper side of bearing chassis is provided with multiple spring one, the upper end between multiple spring one is provided with a vibration box, the guiding groove inside vibration box is slidably provided with multiple screening plates, the left side of each screening plate is provided with hollow shell, the inside of each hollow shell is slidably provided with multiple sliding columns, the outside end of each sliding column is provided with trapezoidal block, the left side of vibration box is provided with multiple trapezoidal plates, multiple trapezoidal blocks are respectively installed with adjacent trapezoidal plate cooperation, by the fast installation's grading screen of the utility model, only need to push screening plate into vibration box to realize the quick installation of screening plate, and only need to pinch two sides pinch plate to be able to quickly disassemble screening plate, also can be moved by roller drive screening plate, assist personnel to quickly install disassembly screening plate, significantly reduce labor intensity, improve overall operation efficiency and flexibility.

Description

Technical Field

[0001] This utility model belongs to the field of plastic granule processing technology, and specifically relates to a grading screen that can be quickly installed. Background Technology

[0002] Plastic granule grading screens are core sorting equipment in plastic recycling and regenerated granulation production lines. They generate multi-dimensional composite vibrations through a vibrating motor, causing the mixed plastic granules entering the screen to undergo throwing, diffusion, and stratification movements on multiple horizontally or inclined screening plates (screens). During this process, particles smaller than the screen aperture (fine material) quickly pass through the screen for grading, while particles larger than the aperture (coarse material) are conveyed forward along the screen surface until discharged. This efficiently and continuously separates the mixture into several grades according to preset particle size specifications (such as 2mm, 4mm, 6mm, etc.). The grading accuracy and throughput directly determine the purity, quality, and subsequent processing performance of the recycled plastics, playing an indispensable role in improving the value of recycled materials, ensuring granulation uniformity, and optimizing the overall automation level of the production line.

[0003] When installing the screening plates of existing grading screens, operators must use wrenches and other tools to laboriously tighten a large number of bolts around the screen frame one by one, or hammer wedges into the clamping mechanism. The whole process not only takes tens of minutes, causing the equipment to be shut down for a long time due to screen replacement, which seriously drags down the overall production efficiency, but also the repeated tightening and disassembly is extremely strenuous physical labor. At the same time, the operation of tools carries the risk of hand injuries, bolt slippage and other occupational injuries. What is more troublesome is that the tightening force depends entirely on the worker's experience. If the torque is too high, the screen will be subjected to localized concentrated stress, causing plastic deformation or damage to the screen surface. If the torque is insufficient, the screen plate will loosen due to continuous vibration of the equipment, resulting in abnormal noise, material leakage and accelerated wear. Utility Model Content

[0004] In view of this, this utility model addresses the shortcomings of the prior art by providing a grading screen that can be quickly installed. The screen plate can be quickly installed simply by pushing it into the vibrating box, and it can be quickly disassembled by squeezing the pinch plates on both sides. The screen plate can also be moved by rollers, which helps personnel to quickly install and disassemble the screen plate, significantly reducing the labor intensity of personnel and thus improving the overall work efficiency and flexibility.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a grading screen that can be quickly installed, including a supporting base frame, a plurality of springs are arranged on the upper side of the supporting base frame, a vibrating box is arranged between the upper ends of the plurality of springs, a plurality of screening plates are slidably arranged in the guide grooves opened inside the vibrating box, a hollow shell is arranged on the left side of each screening plate, a plurality of sliding columns are slidably arranged inside each hollow shell, a trapezoidal block is arranged on the outer end of each sliding column, and a plurality of trapezoidal plates are arranged on the left side of the vibrating box. The blocks are installed in conjunction with adjacent trapezoidal plates. Quick-installation linkage components are provided on the outer arc surface of each sliding column. The quick-installation linkage components can move the trapezoidal blocks on both sides toward each other. The quick-installation linkage components include a limiting plate fixedly sleeved on each sliding column, a pinch plate on the inner end of each sliding column, and a slot adapted to the pinch plate on the upper side of each hollow shell. Multiple springs are provided between the limiting plate and the hollow shell. The multiple springs are respectively sleeved on the outer arc surface of the corresponding sliding column. A handle is provided on the left side of each hollow shell.

[0006] As a further improvement of this utility model, mounting blocks are respectively provided on the front and rear sides of the support base, and the support base and the mounting blocks are fixed together by welding. Each mounting block has multiple mounting holes inside.

[0007] As a further improvement of this utility model, the inside of the vibrating box is equipped with multiple rollers that rotate through the rotating column. Each roller has multiple rubber anti-slip protrusions on its outer arc surface. Two adjacent rollers are in contact with the lower side of the adjacent screening plate. A drive unit for driving the rotating column is provided at the rear of the vibrating box. The drive unit includes multiple drive motors located at the rear of the vibrating box. The output shafts of the multiple drive motors are connected to the rear end of the adjacent rotating column through couplings.

[0008] As a further improvement of this utility model, a vibration motor is provided on the front and rear sides of the vibration box, and the two vibration motors are positioned in the front and rear corresponding positions. The screen holes of the screening plate decrease in size from top to bottom, and the length of the upper screening plate is longer than that of the lower screening plate. A first discharge shell and a second discharge shell are provided on the lower side of the vibration box. Both the first discharge shell and the second discharge shell are connected to the interior of the vibration box, and the first discharge shell is installed in conjunction with the lower screening plate.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: Firstly, by controlling the start of the vibration motor, in conjunction with the spring system, the screening plate inside the vibrating box generates stable vibration, thereby achieving multi-stage precise screening of plastic granules. This process has the advantages of high sorting efficiency, good grading accuracy, and stable operation. It can effectively remove large impurities, debris, and agglomerates, ensuring that particles of different sizes are accurately separated, improving the purity and consistency of raw materials, and meeting the demand for high-quality plastic granules in subsequent processes such as injection molding and extrusion. At the same time, it has a simple structure, is easy to operate, supports continuous operation, and significantly improves production efficiency and product quality stability.

[0010] Secondly, through the self-locking cooperation of the trapezoidal block and the trapezoidal plate, combined with the spring reset mechanism, the screening plate is automatically locked after being pushed in, and released with one button during disassembly. The operation is simple and quick, and the screen plate can be replaced without tools, which significantly shortens the downtime. It is easy to clean and maintain, and can quickly switch the corresponding screen according to different material particle sizes, which greatly improves the flexibility and production adaptability of the equipment. The overall structure is stable and reliable, with strong locking force, and does not loosen during vibration operation.

[0011] Third, rotating rollers driven by a drive motor are installed below the screening plate. They can automatically roll during installation and disassembly. After contacting the screening plate, they generate pushing or pulling forces, effectively replacing the frictional resistance of manual pushing and pulling. This makes the screening plate move more smoothly in the guide groove, greatly reducing the manpower required for operation. This is especially advantageous when dealing with heavy or large screening plates. The active drive function of the rollers realizes the "automatic entry into the frame" and "automatic exit" of the screening plate.

[0012] Fourth, the equipment is firmly fixed to the ground or foundation platform through mounting holes and using anchor bolts, effectively resisting the high-frequency vibration and alternating load generated by the grading screen during operation. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front sectional view of the present invention. Figure 3 This is a schematic diagram of the bottom cross-sectional structure of this utility model; Figure 4 This is an enlarged structural diagram of point A of this utility model.

[0015] In the diagram: 101, Support frame; 102, Spring 1; 103, Vibration box; 104, Screening plate; 105, First discharge shell; 106, Second discharge shell; 107, Vibration motor; 108, Mounting block; 201, Hollow shell; 202, Handle; 203, Trapezoidal plate; 204, Pinch plate; 205, Trapezoidal block; 206, Sliding column; 207, Limiting plate; 208, Spring 2; 301, Roller; 302, Drive motor. Detailed Implementation

[0016] To better understand this utility model, the following embodiments further illustrate its content, but the scope of protection of this utility model is not limited to the embodiments described below. Numerous specific details are set forth in the following description to provide a more thorough understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without one or more of these details.

[0017] like Figure 1 , 2 As shown in Figures 3 and 4, a quick-installation grading screen includes a supporting base 101. Multiple springs 102 are mounted on the upper side of the supporting base 101. A vibrating box 103 is positioned between the upper ends of the multiple springs 102. The springs 102 can be made of high-performance alloy spring steel such as 60Si2Mn or 55CrSi, which effectively supports the smooth operation of the vibrating box 103 due to their good elastic stability, high load-bearing capacity, and excellent fatigue resistance. Multiple screening plates 104 are slidably arranged in guide grooves inside the vibrating box 103. A hollow shell 201 is provided on the left side of each screening plate 104. Multiple sliding columns 206 are slidably arranged inside each hollow shell 201. A trapezoidal block 205 is provided on the outer end of each sliding column 206. The vibrating box 103... Multiple trapezoidal plates 203 are provided on the left side of the vibrating box 103. Multiple trapezoidal blocks 205 are installed in conjunction with adjacent trapezoidal plates 203. Quick-installation linkage components are provided on the outer arc surface of the sliding column 206. The quick-installation linkage components can move the trapezoidal blocks 205 on both sides toward each other. Vibrating motors 107 are provided on the front and rear sides of the vibrating box 103 respectively. The front and rear positions of the two vibrating motors 107 are corresponding. The screen holes of the screening plate 104 decrease from top to bottom. The length of the upper screening plate 104 is longer than that of the lower screening plate 104. A first discharge shell 105 and a second discharge shell 106 are provided on the lower side of the vibrating box 103. The first discharge shell 105 and the second discharge shell 106 are both connected to the interior of the vibrating box 103. The first discharge shell 105 is installed in conjunction with the screening plate 104 on the lower side.

[0018] By controlling the operation of the vibration motor 107, the screening plate 104 inside the vibration box 103 vibrates in conjunction with the spring 102. Then, the plastic particles to be sorted are added to the upper screening plate 104. Plastic particles larger than the aperture of the upper screening plate 104 are intercepted and screened out from the upper screening plate 104 with vibration, while plastic particles smaller than the aperture of the upper screening plate 104 fall from the screen holes onto the lower screen plate. Plastic particles larger than the aperture of the lower screening plate 104 are intercepted and screened out from the lower screening plate 104 with vibration to be discharged into the first discharge shell 105, while plastic particles smaller than the aperture of the lower screening plate 104 fall from the screen holes to the bottom of the vibration box 103 and are discharged from the second discharge shell 106, thereby achieving the sorting of plastic particles.

[0019] like Figure 1 , 2 As shown in Figures 3 and 4, the quick-installation linkage assembly includes a limiting plate 207 fixedly sleeved on each sliding column 206. Each sliding column 206 has a pinch plate 204 on its inner end. Each hollow shell 201 has a slot on its upper side that matches the pinch plate 204. Multiple springs 208 are arranged between the limiting plate 207 and the hollow shell 201, and each spring 208 is sleeved on the outer arc surface of its corresponding sliding column 206. Each hollow shell 201 has a handle 202 on its left side. Multiple rollers 301 are rotatably mounted inside the vibration box 103 via rotating columns. Each roller 301 has multiple rubber anti-slip protrusions on its outer arc surface. These rubber anti-slip protrusions significantly increase the friction between the roller 301 and the screening plate 104, ensuring that the roller 301 can drive the screening plate 104 to move. Two adjacent rollers 301 contact each other on the underside of the adjacent screening plates 104. A drive unit for driving the rotating column is provided on the rear side of the vibrating box 103. The drive unit includes multiple drive motors 302 located on the rear side of the vibrating box 103. The output shafts of the multiple drive motors 302 are connected to the rear end of the adjacent rotating column through couplings.

[0020] When it is necessary to remove the screening plate 104 from the vibrating box 103 for cleaning or replacement, by pinching the two sides of the pinch plate 204, the trapezoidal blocks 205 on both sides of the sliding column 206 move closer to each other and leave the trapezoidal plate 203. Then, the person can pull the handle 202 and at the same time control the drive motor 302 to run in reverse. The output shaft drives the roller 301 on the rotating column to rotate, which can help remove the screening plate 104 from the vibrating box 103.

[0021] When cleaning or replacing the screening plate 104 with a specified aperture, use the handle 202 to insert the screening plate 104 into the guide groove on the left side of the vibrating box 103, and start the drive motor 302 to rotate forward. When the lower side of the screening plate 104 contacts the rotating roller 301, the roller 301 rotates and drives the screening plate 104 to move to the right. When the trapezoidal blocks 205 on both sides contact the trapezoidal plate 203, due to their trapezoidal structure, the trapezoidal blocks 205 are subjected to sliding and pressing action by the trapezoidal plate 203. When the two springs approach each other, the second spring 208 is in a compressed state. Then, the operator pushes the screening plate 104 with the help of the handle 202, so that the trapezoidal blocks 205 on both sides slide into the interior of the trapezoidal plate 203. At this time, the second spring 208 quickly rebounds, causing the trapezoidal blocks 205 on both sides to reset and lock into the interior of the trapezoidal plate 203, and the drive motor 302 is turned off, thereby realizing the installation of the screening plate 104. After the screening plate 104 is installed, the second spring 208 is in a reset state, so fatigue will not occur even after long-term use.

[0022] According to another embodiment of the present invention, such as Figure 1 As shown, mounting blocks 108 are provided on the front and rear sides of the support base 101. Each mounting block 108 has multiple mounting holes inside. These mounting holes can be used with anchor bolts or vibration damping pads for multi-point anchoring, effectively preventing the equipment from shifting, jumping or overturning during high-frequency vibration operation.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A grading screen that can be quickly installed, comprising a supporting base frame (101), characterized in that: The upper side of the supporting base frame (101) is provided with multiple springs (102), and a vibration box (103) is provided between the upper ends of the multiple springs (102). Multiple screening plates (104) are slidably arranged in the guide grooves opened inside the vibration box (103). A hollow shell (201) is provided on the left side of each screening plate (104). Multiple sliding columns (206) are slidably arranged inside each hollow shell (201). A trapezoidal block (205) is provided on the outer end of each sliding column (206). Multiple trapezoidal plates (203) are provided on the left side of the vibration box (103). Multiple trapezoidal blocks (205) are respectively installed in conjunction with adjacent trapezoidal plates (203). A quick-installation linkage component is provided on the outer arc surface of each sliding column (206). The quick-installation linkage component can link the trapezoidal blocks (205) on both sides to move towards each other.

2. The quick-installable grading screen as described in claim 1, characterized in that: The vibration box (103) is provided with vibration motors (107) on the front and rear sides respectively, and the front and rear positions of the two vibration motors (107) are corresponding.

3. The quick-installable grading screen as described in claim 1, characterized in that: The sieve holes of the sieve plate (104) decrease in size from top to bottom, and the length of the upper sieve plate (104) is longer than that of the lower sieve plate (104).

4. The quick-installable grading screen as described in claim 1, characterized in that: The vibrating box (103) is provided with a first discharge shell (105) and a second discharge shell (106) on the lower side. Both the first discharge shell (105) and the second discharge shell (106) are connected to the interior of the vibrating box (103), and the first discharge shell (105) is installed in conjunction with the screening plate (104) on the lower side.

5. The quick-installable grading screen as described in claim 1, characterized in that: Mounting blocks (108) are provided on the front and rear sides of the support frame (101), and each mounting block (108) has multiple mounting holes inside.

6. The quick-installable grading screen as described in claim 1, characterized in that: The quick-install linkage assembly includes a limiting plate (207) fixedly sleeved on each sliding column (206), a pinch plate (204) is provided on the inner end of each sliding column (206), and a slot adapted to the pinch plate (204) is opened on the upper side of each hollow shell (201). Multiple springs (208) are provided between the limiting plate (207) and the hollow shell (201), and the multiple springs (208) are respectively sleeved on the outer arc surface of the corresponding sliding column (206). A handle (202) is provided on the left side of each hollow shell (201).

7. The quick-installable grading screen as described in claim 1, characterized in that: The vibrating box (103) has multiple rollers (301) inside which are rotated by a rotating column. Each roller (301) has multiple rubber anti-slip protrusions on its outer arc surface. Two adjacent rollers (301) are in contact with the lower side of the adjacent screening plate (104). The vibrating box (103) has a drive unit for driving the rotating column to rotate on its rear side.

8. The quick-installable grading screen as described in claim 7, characterized in that: The drive unit includes multiple drive motors (302) disposed on the rear side of the vibration box (103), and the output shafts of the multiple drive motors (302) are respectively connected to the rear end of adjacent rotating columns through couplings.

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