Screening device for the production of plastic granules

Abstract

The utility model discloses a screening device for plastic particle production belongs to the field of plastic particle production, aims at solving the process of adjusting the layer number in the actual dismounting sieve frame under prior art, needs to carry out one by one dismounting operation to multiple bolts in the dismounting process, this makes the operator when increasing or reducing the sieve frame layer number, and a large amount of time and energy are consumed, seriously influence the adjustment efficiency of screening device, and then restrict the production progress of plastic particle, and because the size of the bolt, nut and other parts used is small, in the dismounting process, the operator is slightly inattentive and easily leads to the loss of these parts, not only can influence the normal connection installation of sieve frame, still need to additionally equip spare parts, increase the production cost and management difficulty problem. Including base, the upside of base is fixedly connected with first spring, the upper end of first spring is fixedly connected with vibration body, and the inside bottom end middle position of vibration body is installed with motor.

Description

Technical Field

[0001] This utility model belongs to the field of plastic granule production, specifically relating to a screening device for plastic granule production. Background Technology

[0002] In the production and processing of plastic granules, screening is a crucial step in ensuring the uniformity of product particle size. Vibrating screens are widely used in plastic granule screening due to their multi-size grading capability and high screening accuracy. To accommodate the screening needs of plastic granules of different sizes, vibrating screens typically employ a design that allows for the addition or reduction of screen frame layers. This means that the number of filter layers can be adjusted by changing the number of screen frames, thereby achieving different particle size classifications of the plastic granules. Currently, the screen frames of a vibrating screen are mainly fixed together using flange connections or snap-fit ​​connections. When using flange connections, multiple bolts are needed to penetrate the flanges of adjacent screen frames. Tightening the bolts ensures a tight fit between the flanges, thus securing the screen frames. While snap-fit ​​connections simplify the connection structure to some extent, they usually require additional bolts for reinforcement to ensure connection stability.

[0003] However, in the actual disassembly and assembly of the screen frame to adjust the number of layers, the above two connection methods require the disassembly and assembly of multiple bolts one by one. This makes it time-consuming and laborious for operators to add or remove screen frame layers, which seriously affects the adjustment efficiency of the screening device and thus restricts the production progress of plastic granules. Moreover, because the bolts, nuts and other parts used are small in size, they are easy to lose during disassembly and assembly if the operators are not careful. This not only affects the normal connection and installation of the screen frame, but also requires additional spare parts, increasing production costs and management difficulty.

[0004] Therefore, there is an urgent need for a screening device for plastic pellet production that can quickly disassemble and assemble the screen frame and reduce the risk of losing parts. Utility Model Content

[0005] (1) Technical problems to be solved To address the shortcomings of existing technologies, the purpose of this utility model is to provide a screening device for plastic granule production. This device aims to solve the problem that in existing technologies, adjusting the number of screen layers requires the individual disassembly and reassembly of multiple bolts. This necessitates significant time and effort from operators when adding or removing screen layers, severely impacting the adjustment efficiency of the screening device and consequently hindering the production progress of plastic granules. Furthermore, due to the small size of the bolts, nuts, and other parts used, operators are prone to accidental loss during disassembly and reassembly. This not only affects the normal connection and installation of the screen frame but also necessitates the use of spare parts, increasing production costs and management complexity.

[0006] (2) Technical solution To solve the above-mentioned technical problems, this utility model provides a screening device for plastic granule production, including a base. A first spring is fixedly connected to the upper side of the base, and a vibrating body is fixedly connected to the upper end of the first spring. A motor is installed at the middle position of the bottom of the vibrating body. Weights are installed at the upper and lower ends of the motor's output shaft. A screening mechanism is connected to the upper end of the vibrating body, and the screening mechanism includes a first screen frame fixedly connected to the upper side of the vibrating body. A conical base plate is fixedly connected to the inner bottom end of the first screen frame. A second screen frame is connected to the upper end of the first screen frame, and a... A fine screen is provided. A third screen is connected to the upper end of the second screen frame. A coarse screen is fixedly connected to the bottom inner side of the third screen frame. A top cover is connected to the upper side of the third screen frame. A discharge port is fixedly connected to the outer ends of the first, second, and third screen frames. Rectangular cylinders are welded at equal intervals on the upper inner sides of the first, second, and third screen frames. A second spring is fixedly connected to the innermost end of the rectangular cylinder. A plug rod is fixedly connected to the other end of the second spring. A connecting ring is welded to the lower outer side of the second, third, and top cover. A disassembly unit is provided on the inner side of the second and third screen frames.

[0007] Furthermore, the disassembly and assembly unit includes a bottom ring welded to the bottom inner side of the second and third screen frames. Threaded rods are welded at equal intervals on the upper side of the bottom ring, and nuts are threaded onto the outer side of the threaded rods.

[0008] Furthermore, the top cover has a feed inlet at its upper end, and the sieve hole diameter inside the coarse screen is larger than that inside the fine screen.

[0009] Furthermore, the upper ends of the first, second, and third screen frames are provided with circular holes at the connection points with the rectangular tube, and the outer side of the insertion rod is slidably connected to the inner side of the rectangular tube and the circular holes.

[0010] Furthermore, the lower end of the connecting ring has equally spaced insertion holes, the outer side of the insertion rod is inserted into the inner side of the insertion hole, and the lower outer end of the connecting ring is slidably connected to the outer upper end of the first screen frame, the second screen frame, or the third screen frame.

[0011] Furthermore, rubber rings are affixed to the upper sides of the first, second, and third screen frames.

[0012] Furthermore, the fine and coarse screens are stainless steel mesh screens.

[0013] Furthermore, the threaded rod passes through the sieve holes inside the fine or coarse sieve, the lower edge of the fine or coarse sieve abuts against the upper side of the bottom ring, and the lower side of the nut abuts against the upper edge of the fine or coarse sieve.

[0014] (3) Beneficial effects Compared with the prior art, the beneficial effects of this utility model are as follows: This invention, through the setting of a screening mechanism, pushes the insert rod inside the rectangular tube on the inner side of the first screen frame into the interior of the rectangular tube, so that the insert rod is no longer fixed to the connecting ring at the outer end of the second screen frame. At this time, the first and second screen frames are no longer relatively fixed, and the second screen frame can then be removed from the top of the first screen frame. Similarly, by pushing the insert rod inside the rectangular tube on the inner side of the first screen frame into the interior of the rectangular tube, the second screen frame is placed on top of the first screen frame. At the same time, the connecting ring slides to the outer side of the upper end of the first screen frame, and then the second spring rebounds and pushes out the insert rod. Pushing the end of the insert rod away from the second spring into the insertion hole in the connecting ring allows the first and second screen frames to be fixed again. This makes the disassembly and assembly of the screen frames in the screening device very convenient, and the addition or removal of screen frames does not require a lot of time. Moreover, no small parts need to be disassembled during the addition or removal of screen frames, avoiding the problem of parts loss that may occur when adding or removing screen frames.

[0015] This utility model, by setting up a disassembly and assembly unit, allows the fine or coarse screen to be removed from the bottom ring after the nut on the outside of the threaded rod is removed. Then, a new fine or coarse screen is placed on top, and the nut is reinstalled, so that the fine or coarse screen can be replaced quickly when it is damaged. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the main body of this utility model; Figure 3 This is a schematic diagram of the upper structure of the third sieve frame of this utility model; Figure 4 This is a schematic diagram of the lower end structure of the third sieve frame of this utility model; Figure 5 This is a schematic diagram of the structure of the second spring in this utility model; Figure 6 This is a schematic diagram of the disassembly and assembly unit of this utility model.

[0018] The markings in the attached diagram are as follows: 1. Base; 2. First spring; 3. Vibrating body; 4. Motor; 5. Counterweight; 601. First screen frame; 602. Conical base plate; 603. Second screen frame; 604. Fine screen; 605. Third screen frame; 606. Coarse screen; 607. Top cover; 608. Discharge port; 609. Rectangular cylinder; 610. Second spring; 611. Insert rod; 612. Connecting ring; 701. Bottom ring; 702. Threaded rod; 703. Nut. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] This specific embodiment is a screening device for plastic granule production, and its structural schematic diagram is shown below. Figures 1 to 5As shown, the device includes a base 1, a first spring 2 fixedly connected to the upper side of the base 1, a vibrating body 3 fixedly connected to the upper end of the first spring 2, a motor 4 installed at the middle position of the bottom of the inner part of the vibrating body 3, and weights 5 installed at the upper and lower ends of the output shaft of the motor 4. A screening mechanism is connected to the upper end of the vibrating body 3, and the screening mechanism includes a first screen frame 601 fixedly connected to the upper side of the vibrating body 3, a conical base plate 602 fixedly connected to the inner bottom of the first screen frame 601, a second screen frame 603 connected to the upper end of the first screen frame 601, a fine screen 604 connected to the inner bottom of the second screen frame 603, a third screen frame 605 connected to the upper end of the second screen frame 603, and a coarse screen 606 fixedly connected to the inner bottom of the third screen frame 605. The fine screen 604 and the coarse screen 606 are stainless steel mesh screens. A top cover 607 is connected to the upper side of the third screen frame 605. A feed inlet is provided at the upper end of the top cover 607. The sieve hole diameter inside the coarse screen 606 is larger than the sieve hole diameter inside the fine screen 604. A discharge port 608 is fixedly connected to the outer ends of the first screen frame 601, the second screen frame 603, and the third screen frame 605. Rectangular cylinders 609 are welded at equal intervals on the upper inner side of the first screen frame 601, the second screen frame 603, and the third screen frame 605. A second spring 610 is fixedly connected to the innermost end of the rectangular cylinder 609. A rod 611 is fixedly connected to the other end of the second spring 610. A round hole is provided at the connection between the upper end of the first screen frame 601, the second screen frame 603, and the third screen frame 605 and the rectangular cylinder 609. The outer side of the rod 611 is slidably connected to the rectangular cylinder 609 and the inner side of the round hole. Connecting rings 612 are welded to the lower outer ends of the second screen frame 603, the third screen frame 605, and the top cover 607. The lower inner end of the connecting ring 612 has equally spaced insertion holes. The outer side of the insertion rod 611 is inserted into the inner side of the insertion hole. The lower outer end of the connecting ring 612 is slidably connected to the outer upper end of the first screen frame 601, the second screen frame 603, or the third screen frame 605. Thus, by pushing the insertion rod 611 inside the rectangular tube 609 inside the first screen frame 601, the insertion rod 611 no longer fixes the connecting ring 612 at the outer end of the second screen frame 603. At this point, the first screen frame 601 and the second screen frame 603 are no longer relatively fixed, and the second screen frame 603 can then be removed from the upper end of the first screen frame 601. Similarly, by pushing the insertion rod 611 inside the rectangular tube 609 inside the first screen frame 601, the second screen frame 603 can be placed on top of the first screen frame. Above 601, while the connecting ring 612 slides to the outer side of the upper end of the first screen frame 601, the second spring 610 rebounds and pushes out the insert rod 611. The end of the insert rod 611 away from the second spring 610 is pushed into the insertion hole in the connecting ring 612, which can re-fix the first screen frame 601 and the second screen frame 603, making the disassembly and assembly of the screen frames in the screening device very convenient. As a result, the addition or removal of screen frames does not require a lot of time, and no small parts need to be disassembled during the addition or removal, avoiding the problem of parts loss that may occur when adding or removing screen frames.

[0021] Rubber rings are attached to the upper sides of the first screen frame 601, the second screen frame 603, and the third screen frame 605. This ensures a seal between the two screen frames after the second screen frame 603 is installed on top of the first screen frame 601, as the rubber rings on the upper side of the first screen frame 601 contact the lower side of the second screen frame 603. Similarly, a seal is maintained between the second screen frame 603 and the third screen frame 605, and between the third screen frame 605 and the top cover 607, preventing plastic particles from leaking out between the screen frames during screening.

[0022] Cooperate Figure 6 As shown, the inner sides of the second screen frame 603 and the third screen frame 605 are provided with disassembly and assembly units. Each disassembly and assembly unit includes a bottom ring 701 welded to the bottom inner side of the second screen frame 603 and the third screen frame 605. Threaded rods 702 are welded at equal intervals on the upper side of the bottom ring 701, and nuts 703 are threadedly connected to the outer side of the threaded rods 702. The threaded rods 702 pass through the screen holes inside the fine screen 604 or the coarse screen 606. The lower edge of the fine screen 604 or the coarse screen 606 abuts against the upper side of the bottom ring 701, and the lower side of the nut 703 abuts against the upper edge of the fine screen 604 or the coarse screen 606. By removing the nut 703 on the outside of the threaded rod 702, the fine screen 604 or coarse screen 606 can be removed from the bottom ring 701. Then, a new fine screen 604 or coarse screen 606 can be placed on top, and the nut 703 can be reinstalled. This allows for quick replacement of the fine screen 604 or coarse screen 606 when it is damaged.

[0023] Working principle: When screening plastic granules, the motor 4 is turned on first to make the hammer 5 rotate, which in turn makes the vibrator 3 vibrate. Then, the plastic granules are poured into the top cover 607 from the feed port at the top of the top cover 607. The plastic granules will first fall onto the coarse screen 606. After being screened by the vibrating coarse screen 606, they fall onto the fine screen 604. After being screened by the fine screen 604, they fall onto the conical bottom plate 602, so that plastic granules of different sizes fall from the discharge port 608 at different heights, thus completing the grading and screening of plastic granules.

[0024] All technical features in this embodiment can be freely combined according to actual needs.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. Sieving device for the production of plastic granules, comprising a base (1), characterized in that, A first spring (2) is fixedly connected to the upper side of the base (1). A vibrating body (3) is fixedly connected to the upper end of the first spring (2). A motor (4) is installed at the middle position of the bottom of the vibrating body (3). A counterweight (5) is installed at the upper and lower ends of the output shaft of the motor (4). A screening mechanism is connected to the upper end of the vibrating body (3). The screening mechanism includes a first screen frame (601) fixedly connected to the upper side of the vibrating body (3). A conical base plate (602) is fixedly connected to the bottom inner side of the first screen frame (601). A second screen frame (603) is connected to the upper end of the first screen frame (601). A fine screen (604) is connected to the bottom inner side of the second screen frame (603). A third screen frame (605) is connected to the upper end of the second screen frame (603). A coarse screen (606) is fixedly connected. A top cover (607) is connected to the upper side of the third screen frame (605). A discharge port (608) is fixedly connected to the outer ends of the first screen frame (601), the second screen frame (603), and the third screen frame (605). Rectangular cylinders (609) are welded at equal intervals on the upper inner side of the first screen frame (601), the second screen frame (603), and the third screen frame (605). A second spring (610) is fixedly connected to the innermost end of the rectangular cylinder (609). A plug rod (611) is fixedly connected to the other end of the second spring (610). A connecting ring (612) is welded to the lower outer side of the second screen frame (603), the third screen frame (605), and the top cover (607). A disassembly unit is provided on the inner side of the second screen frame (603) and the third screen frame (605).

2. The screening device for producing plastic granules according to claim 1, characterized in that, The disassembly and assembly unit includes a bottom ring (701) welded to the bottom inner side of the second screen frame (603) and the third screen frame (605). Threaded rods (702) are welded at equal intervals on the upper side of the bottom ring (701), and nuts (703) are threaded to the outer side of the threaded rods (702).

3. The screening device for producing plastic granules according to claim 1, characterized in that, The top cover (607) has a feed inlet at its upper end, and the sieve hole diameter inside the coarse screen (606) is larger than the sieve hole diameter inside the fine screen (604).

4. The screening device for producing plastic granules according to claim 1, characterized in that, The upper ends of the first sieve frame (601), the second sieve frame (603) and the third sieve frame (605) are provided with round holes at the connection between them and the rectangular tube (609). The outer side of the insertion rod (611) is slidably connected to the inner side of the rectangular tube (609) and the round hole.

5. The screening device for producing plastic granules according to claim 1, characterized in that, The lower end of the connecting ring (612) has equidistant insertion holes. The outer side of the insertion rod (611) is inserted into the inner side of the insertion hole. The lower outer end of the connecting ring (612) is slidably connected to the outer upper end of the first sieve frame (601), the second sieve frame (603), or the third sieve frame (605).

6. The screening device for producing plastic granules according to claim 1, characterized in that, Rubber rings are attached to the upper sides of the first sieve frame (601), the second sieve frame (603), and the third sieve frame (605).

7. The screening device for producing plastic granules according to claim 3, characterized in that, The fine screen (604) and coarse screen (606) are stainless steel mesh screens.

8. The screening device for producing plastic granules according to claim 2, characterized in that, The threaded rod (702) passes through the sieve holes inside the fine sieve (604) or coarse sieve (606), the lower edge of the fine sieve (604) or coarse sieve (606) abuts against the upper side of the bottom ring (701), and the lower side of the nut (703) abuts against the upper edge of the fine sieve (604) or coarse sieve (606).

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