Screening device for polyethylene film production raw materials

Abstract

The utility model relates to the technical field of polyethylene screening, and discloses a screening device for polyethylene film production raw materials, which comprises a screening box and a feed hopper, a crushing mechanism is arranged in the feed hopper, three groups of mounting seats are fixed on the wall surface of an inner cavity of the screening box, and screening frames are placed in inner cavities of the mounting seats; compression springs are fixed to the side wall faces of inner cavities of the mounting bases, inserting holes are formed in one side wall face of the screening box, push rods slide in inner cavities of the inserting holes, push plates are fixed to one ends of the push rods, mounting plates are fixed to the wall face of the screening box, motors are fixed to the side wall faces of the mounting plates, and cams are fixedly mounted at the output shaft ends of the motors. Through cooperation of a screening frame, a motor and a cam, multi-stage screening is carried out according to different apertures of screening holes in an inner cavity of the screening frame, polyethylene raw materials can be subjected to multi-stage screening, the screening effect is better, the polyethylene raw materials can be effectively prevented from excessively flowing into the inner cavity of the screening box at a time through a buffer plate, and the screening efficiency is improved. Therefore, the uniformity and the efficiency in the screening process are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polyethylene screening, in particular to a screening device for raw materials for polyethylene film production. Background Art

[0002] Polyethylene is one of the five major synthetic resins, with excellent corrosion resistance and electrical insulation (especially high-frequency insulation). It can be chlorinated, irradiated and modified, and can be reinforced with glass fiber. The melting point, rigidity, hardness and strength of high-density polyethylene are relatively high, with small water absorption, good electrical properties and radiation resistance. As a raw material for the production of composite pipes, during the production process, it needs to be screened and filtered after coarse crushing.

[0003] After retrieval, the publicly disclosed (announced) number CN220638571U discloses a polyethylene raw material crushing, filtering and screening device, including a bottom plate. The bottom ends of the four sides of the bottom plate are fixedly installed with bases. The top end of the bottom plate is fixedly installed with a screening box. The top end of the screening box is fixedly installed with a crushing box. The top of the crushing box is provided with a feeding port. Two crushing rollers are rotatably installed inside the crushing box. A driving structure is arranged on one side of the screening box. By setting the crushing rollers, crushing blocks, driving structure and guiding structure, the integration of crushing and screening can be effectively realized, and the utilization rate of the driving motor is improved. The staff pours the polyethylene raw material into the crushing box from the feeding port, starts the driving motor, the output end of the driving motor drives the rotating rod to rotate, the pulley one on the rotating rod drives the pulley two to rotate through the belt, and the pulley two drives the crushing rollers to rotate. Since the main gear and the sub-gear are meshed, the two crushing rollers start to rotate in opposite directions, and the crushing blocks on the crushing rollers can crush the polyethylene raw material.

[0004] In the above-mentioned prior art solution, the polyethylene raw material cannot be screened at multiple levels, so the screening effect is not good.

[0005] Therefore, we propose a screening device for raw materials for polyethylene film production. Content of the Utility Model

[0006] The utility model mainly solves the technical problems existing in the above-mentioned prior art, and provides a screening device for raw materials for polyethylene film production.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme. A screening device for raw materials for polyethylene film production includes a screening box and a feeding hopper. A crushing mechanism is arranged inside the feeding hopper. Three groups of mounting seats are fixed on the inner wall surface of the screening box cavity. Screening frames are placed inside the mounting seats. Compression springs are fixed on the side wall surfaces inside the mounting seats. Jacks are opened on one side wall surface of the screening box. Push rods slide inside the jacks. One end of the push rod is fixed with a push plate. A mounting plate is fixed on the wall surface of the screening box. A motor is fixed on the side wall surface of the mounting plate. The output shaft end of the motor is fixedly installed with a cam.

[0008] Preferably, buffer plates are inclined on both side walls of the inner cavity of the feed hopper, and vibration motors are installed on both sides of the outer wall surface of the feed hopper.

[0009] Preferably, the feed hopper is of a Y-shaped structure, and the number of the buffer plates is two, which are connected at different heights in the inner cavity of the feed hopper.

[0010] Preferably, the aperture diameters of the sieve holes on the screening box decrease successively.

[0011] Preferably, the compression spring is in mutual contact with the side wall surface of the screening box, and the side wall of the cam is in mutual contact with the surface of the push plate.

[0012] Preferably, the mounting plate is of an L-shaped structure.

[0013] The utility model provides a screening device for raw materials used in the production of polyethylene films. It has the following beneficial effects:

[0014] 1. For the screening device for raw materials used in the production of polyethylene films, through the cooperation of the screening box, the motor and the cam, according to the different aperture diameters of the sieve holes in the inner cavity of the screening box, multi-stage screening can be carried out, and the polyethylene raw materials can be screened in multiple stages, making the screening effect better.

[0015] 2. For the screening device for raw materials used in the production of polyethylene films, through the buffer plate, it can effectively prevent the polyethylene raw materials from flooding into the inner cavity of the screening box too much at one time, thereby improving the uniformity and efficiency in the screening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0017] The structures, ratios, sizes, etc. illustrated in this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limited conditions under which the present utility model can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the ratio relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model.

[0018] Figure 1 It is a three-dimensional schematic diagram of the structure of the present utility model;

[0019] Figure 2 It is a schematic diagram of the disassembly of the inner cavities of the screening box and the feed hopper of the present utility model;

[0020] Figure 3 This is a schematic diagram of the disassembly of the inner cavities of the screening box and the feed hopper of the present utility model.

[0021] Legend:

[0022] 1. Screening box; 2. Feed hopper; 201. Crushing mechanism; 202. Vibration motor; 203. Buffer plate; 3. Motor; 301. Cam; 302. Mounting plate; 4. Pusher plate; 401. Push rod; 402. Jack; 5. Mounting seat; 501. Compression spring; 6. Screening frame. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment: A screening device for raw materials used in the production of polyethylene films, as Figures 1 - 3 shown, includes a screening box 1. A feed hopper 2 with a Y-shaped structure is connected to the top of the screening box 1. A crushing mechanism 201 is provided at the top inside the feed hopper 2. Buffer plates 203 are inclinedly arranged on both side wall surfaces inside the cavity of the feed hopper 2. The two buffer plates 203 are connected at different heights in the cavity of the feed hopper 2. Vibration motors 202 are installed on both sides of the outer wall surface of the feed hopper 2. Three groups of mounting seats 5 are fixedly connected at equal distances on the two wall surfaces inside the cavity of the screening box 1. The inner cavity of the mounting seat 5 is of a U-shaped structure. Screening frames 6 are placed in the inner cavities of the three groups of mounting seats 5. The aperture of the sieve holes on the screening frames 6 decreases in sequence, so as to screen out the polyethylene raw materials in order from large to small. Three compression springs 501 are fixedly connected to the side wall surfaces of the inner cavity of one side of the mounting seats 5. The compression springs 501 are in mutual contact with the side wall surfaces of the screening frames 6. Jacks 402 are provided on the side wall surface of the screening box 1 away from the compression springs 501. There are two groups of jacks 402. Push rods 401 are slidably connected in the inner cavities of the jacks 402. One end of the push rod 401 away from the jack 402 is fixedly connected with a rectangular pusher plate 4. An L-shaped mounting plate 302 is fixedly connected to the side wall surface of the screening box 1 on the side of the pusher plate 4. A motor 3 is fixedly installed on the side wall surface of the mounting plate 302. A cam 301 is fixedly installed at the output shaft end of the motor 3. The side wall of the cam 301 is in mutual contact with the surface of the pusher plate 4.

[0025] The working principle of the present utility model:

[0026] In use, pour the polyethylene raw material from the feed hopper 2, and crush the raw material through the crushing mechanism 201. The crushed raw material falls into the inner cavity of the screening box 6. Start the motor 3 to drive the rotation of the cam 301. The convex end of the rotating cam 301 presses the push plate 4, causing the screening box 6 to move to the right. After the convex end of the cam 301 rotates away from the push plate 4, the push plate 4 resets under the action of three compression springs 501. According to the different pore diameters of the sieve holes in the inner cavity of the screening box 6, multi-stage screening is carried out.

[0027] In use, through the buffer plate 203 arranged in the inner cavity of the feed hopper 2, the buffer plate 203 can effectively prevent the polyethylene raw material from pouring into the inner cavity of the screening box 1 too much at one time, thereby improving the uniformity and efficiency in the screening process.

[0028] For the sake of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that the spatial relative terms are intended to cover different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the figure is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures after inversion. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations are made for the spatial relative descriptions used here.

[0029] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0030] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0031] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above-mentioned embodiments. What is described in the above-mentioned embodiments and the description is only to illustrate the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A screening device for raw materials used in the production of polyethylene films, comprising a screening box (1) and a feed hopper (2), characterized in that: A crushing mechanism (201) is provided inside the feed hopper (2). Three groups of mounting seats (5) are fixed on the inner cavity wall surface of the screening box (1). Screening frames (6) are placed inside the cavities of the mounting seats (5). Compression springs (501) are fixed on the side wall surfaces inside the cavities of the mounting seats (5). Plug holes (402) are formed on one side wall surface of the screening box (1). Push rods (401) are slidably arranged inside the plug holes (402). A push plate (4) is fixed at one end of the push rod (401). A mounting plate (302) is fixed on the wall surface of the screening box (1). A motor (3) is fixed on the side wall surface of the mounting plate (302). A cam (301) is fixedly installed at the output shaft end of the motor (3).

2. The screening device for raw materials used in the production of polyethylene films according to claim 1, wherein: Buffer plates (203) are inclined on both side wall surfaces inside the cavity of the feed hopper (2). Vibration motors (202) are installed on both sides of the outer wall surface of the feed hopper (2).

3. The screening device for raw materials used in the production of polyethylene films according to claim 2, wherein: The feed hopper (2) is of a Y-shaped structure. The number of the buffer plates (203) is two, and they are connected in a one-high-one-low manner inside the cavity of the feed hopper (2).

4. The screening device for raw materials used in the production of polyethylene films according to claim 1, wherein: The aperture diameters of the sieve holes on the screening frame (6) decrease successively.

5. The screening device for raw materials used in the production of polyethylene films according to claim 1, wherein: The compression spring (501) is in mutual contact with the side wall surface of the screening frame (6), and the side wall of the cam (301) is in mutual contact with the surface of the push plate (4).

6. The screening device for raw materials used in polyethylene film production according to claim 1, wherein: The mounting plate (302) is of an L-shaped structure.

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