Raw material screening device for PE water supply pipe production and manufacturing

Abstract

The invention relates to the technical field of screening equipment, and discloses a raw material screening device for PE water supply pipe production and manufacturing. The raw material screening device comprises a connecting plate, an upper screen is arranged at the top end of the connecting plate, a lower screen plate is arranged at the bottom end of the connecting plate, and the bottom end of a fixing column is fixedly connected with the center of the top end of the lower screen plate; the top end of the fixing column makes contact with the center of the bottom end of the upper screen, a limiting piece is arranged between the upper screen and the lower screen plate, the limiting piece is movably connected with the fixing column in a sleeved mode, and a plurality of bouncing balls are arranged in the limiting piece. The upper end and the lower end of the limiting ring make contact with the bottom end of the upper screen and the top end of the lower screen plate correspondingly, the multiple sets of bouncing balls are effectively separated through the limiting ring, during work, the bouncing balls continuously impact the limiting ring under the swing effect, then the vibration effect is generated on the upper screen and the lower screen plate, the impact area of the bouncing balls is effectively enlarged, and the bouncing effect is improved. And the vibration effect on the upper screen and the lower screen plate is enhanced, so that the vibration amplitude is increased, and the screening and unblocking effects are improved.

Description

Technical Field

[0001] This application relates to the field of screening equipment technology, and in particular to a raw material screening device for the production and manufacturing of PE water supply pipes. Background Technology

[0002] During the manufacturing process of PE water supply pipes, PE raw materials (usually in granular form) may be mixed with impurities or clump during transportation, storage, and loading and unloading, which may affect product quality. To ensure the uniformity and stability of PE raw materials, raw material screening is a crucial and indispensable process to ensure product quality.

[0003] For PE granules, raw material screening devices generally use circular gyratory screens. These screens consist of a main body consisting of a cover plate, screen frame, screen mesh, and bottom plate, as well as a power unit consisting of a vibrating motor and vibrating seat. The vibrating motor drives the eccentric weights at both ends to rotate, synthesizing the rotational motion of the vibrating motor into a complex three-dimensional gyratory motion, which is then transmitted to the main body of the screen box. This causes the material particles falling from the top of the screen mesh to move in a spiral motion under the gyratory action, so that some material particles pass through the screen mesh, while the other part of the material particles are discharged from the discharge hopper of the screen frame, effectively achieving full screening of the material particles.

[0004] However, existing raw material screening devices still have some defects in use: in order to enhance the anti-clogging ability, bouncing balls are often set between the upper screen and the lower screen plate. However, because the distance between the upper screen and the lower screen plate is close, the size of the bouncing balls is limited, and their elasticity is small. The impact force on the upper screen and the lower screen plate is small, resulting in a weak vibration amplitude and an insignificant screening and clogging effect. Summary of the Invention

[0005] This application proposes a raw material screening device for the production of PE water supply pipes, which has the advantages of effectively expanding the impact area of ​​the bouncing ball, enhancing the vibration effect on the upper screen and lower screen plate, increasing the vibration amplitude, and improving the screening and unblocking effect. This solves the problem that the existing bouncing balls have small elasticity due to their size, resulting in an insignificant unblocking effect.

[0006] To achieve the above objectives, this application adopts the following technical solution: a raw material screening device for the production of PE water supply pipes, comprising:

[0007] The connecting plate includes an upper screen and a lower screen, wherein the upper screen is provided at the top of the connecting plate and the lower screen is provided at the bottom of the connecting plate.

[0008] A fixed column, the bottom end of which is fixedly connected to the center of the top end of the lower screen plate, and the top end of the fixed column is in contact with the center of the bottom end of the upper screen.

[0009] A limiting component is provided between the upper screen and the lower screen plate, and the limiting component is movably sleeved with the fixed column;

[0010] Bouncing balls, wherein the limiting member contains a plurality of sets of bouncing balls;

[0011] The bouncing ball is constantly impacted by the limiting component due to the swaying action. The limiting component expands the impact area of ​​the bouncing ball and transmits the generated vibration force to the upper screen and lower screen plate, thereby enhancing the vibration effect on the upper screen and lower screen plate and increasing the vibration amplitude of the upper screen and lower screen plate.

[0012] Furthermore, the limiting member includes:

[0013] A limiting ring separates the two sets of bouncing balls. The top end of the limiting ring contacts the bottom end of the upper screen, and the bottom end of the limiting ring contacts the top end of the lower screen plate. There are several limiting rings, which are concentrically arranged and have different diameters. The smallest limiting ring is movably sleeved on the fixed post.

[0014] The limiting rods are connected to the limiting rings by limiting rods. There are two rows of limiting rods, with the bottom surface of one row of limiting rods contacting the bottom surface of the upper screen and the bottom surface of the other row of limiting rods contacting the top surface of the lower screen plate. Each row of limiting rods consists of four sets of limiting rods, and the four sets of limiting rods are evenly arranged around the fixing column. The cross-sectional shape of the limiting rod is triangular, and the surface of the limiting rod is covered with a silicone layer.

[0015] Furthermore, a connecting rod is vertically sleeved on the connecting plate, and the connecting plate is connected to the upper screen and the lower screen plate through the connecting rod.

[0016] By using limiting components to stably position themselves between the connecting plate and the upper screen, the stability of the upper and lower screen plates can be improved, their resistance to deformation can be enhanced to counteract the impact force generated by falling material particles, and their service life can be extended. Furthermore, the bouncing balls of different ranges can be separated, achieving effective grouping of multiple bouncing balls. This avoids over- or under-cleaning caused by the rolling and agglomeration of bouncing balls within the screen assembly, effectively enhancing the uniformity of bouncing ball distribution and improving the cleaning effect.

[0017] Furthermore, the connecting plate, upper screen, lower screen plate, connecting rod, fixing column, limiting member, and bouncing ball are the constituent parts of the screen assembly.

[0018] Furthermore, the screen assembly also includes:

[0019] The driving component has two rows of driving components embedded inside the connecting plate, and one row of driving components corresponds to the height of one row of limiting rods. Each row of driving components consists of three groups of driving components, and each group of driving components consists of four driving components. Three adjacent driving components are located in the three groups of driving components, and the three groups of driving components are cyclically energized. Each driving component is magnetic and is a gradient magnet.

[0020] Furthermore, the end of the limiting rod that is not connected to the limiting ring has a magnetism opposite to that of the driving member.

[0021] By installing two rows of driving components inside the connecting plate, with each row consisting of three sets of driving components and each set consisting of four driving components, the three sets of driving components are cyclically energized during operation. Two rows of limiting rods are installed on the limiting ring, with each row consisting of four limiting rods. Each set of limiting rods has a silicone layer on its surface, and the end of the limiting ring not connected to it is magnetic. When the driving components are working, they can generate a magnetic force on the limiting rods, allowing them to rotate under the restriction of the limiting ring. This not only thoroughly cleans the bottom surface of the upper screen and the top surface of the lower screen plate but also provides friction cleaning to the surface of the bouncing ball, preventing dirt from adhering to the bouncing ball and affecting its normal bouncing, thus effectively ensuring the bouncing quality of the bouncing ball.

[0022] Furthermore, the screen assembly is a component of the screening mechanism, and the screening mechanism is located at the top of the base.

[0023] Furthermore, the screening mechanism also includes:

[0024] A vibration seat, wherein a vibration motor is installed inside the vibration seat;

[0025] A vibration support column, one end of which is fixedly connected to the side wall of the vibration seat, and the other end of which is fixedly connected to the top of the base;

[0026] The bottom plate is connected to the bottom end of the vibrating seat;

[0027] The screen frame has a bottom plate connected to the bottom of the screen frame, and a discharge hopper is provided at one end of the screen frame. A screen assembly is connected between two adjacent screen frames.

[0028] The cover plate has a top end of the screen frame and a bottom end of the cover plate, and a feed hopper is provided in the middle of the cover plate;

[0029] A sealing ring is provided between the upper and lower ends of the screen frame, which has a main sealing groove, and the bottom plate, screen assembly and cover plate connected to the screen frame have auxiliary sealing grooves. A sealing ring is provided between the main sealing groove and the auxiliary sealing groove.

[0030] The beneficial effects of this invention are as follows:

[0031] This application provides a raw material screening device for PE water supply pipe manufacturing. A limiting component is movably installed between the upper screen and the lower screen plate, and this limiting component is effectively sleeved on a fixed post at the top center of the lower screen plate. The limiting component consists of multiple concentric limiting rings and limiting rods connecting the multiple limiting rings. Because the upper and lower ends of the limiting rings contact the bottom end of the upper screen and the top end of the lower screen plate respectively, and the limiting rings effectively separate multiple sets of bouncing balls, during operation, the bouncing balls, under the influence of swaying, continuously impact the limiting rings, thereby generating a vibration effect on the upper and lower screen plates. This effectively expands the impact area of ​​the bouncing balls, enhances the vibration effect on the upper and lower screen plates, increases the vibration amplitude, and improves the screening and unblocking effect. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0033] Figure 1 This is a three-dimensional structural diagram of the entire invention;

[0034] Figure 2 This is a cross-sectional three-dimensional structural diagram of the entire invention;

[0035] Figure 3 In this invention Figure 2 Enlarged structural diagram at point A;

[0036] Figure 4 This is a three-dimensional structural diagram of the screen assembly in this invention;

[0037] Figure 5 This is a cross-sectional three-dimensional structural diagram of the screen assembly in this invention;

[0038] Figure 6 This is a three-dimensional structural diagram of a screen assembly without an upper screen in this invention;

[0039] Figure 7 This is a three-dimensional structural diagram of the limiting component, the driving component, and the bouncing ball in this invention;

[0040] Figure 8 This is a three-dimensional structural diagram of the screen assembly in the disassembled state in this invention.

[0041] In the diagram: 1. Base; 2. Screening mechanism; 21. Vibrating seat; 22. Vibrating support column; 23. Base plate; 24. Screen frame; 25. Cover plate; 26. Sealing ring; 3. Screen assembly; 31. Connecting plate; 32. Upper screen; 33. Lower screen plate; 34. Connecting rod; 4. Fixed column; 5. Limiting component; 51. Limiting ring; 52. Limiting rod; 6. Driving component; 7. Bouncing ball. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Example 1: A raw material screening device for PE water supply pipe manufacturing, including a base 1, as shown in the figure. Figures 1-2A vibrating seat 21 is installed above the base 1. The vibrating seat 21 contains a vibrating motor and eccentric weights. When the vibrating motor starts, it drives the eccentric weights at both ends to rotate, synthesizing the motor's rotational motion into a complex three-dimensional oscillating motion. This motion is transmitted upwards through the vibrating seat 21, providing oscillating force for screening material particles. One end of a vibrating support column 22 is fixedly connected to the side wall of the vibrating seat 21, and the other end is fixedly connected to the top of the base 1. There are four vibrating supports 22, evenly arranged around the vibrating seat 21, connecting the base 1 and the vibrating seat 21. These supports isolate and absorb vibration, ensuring stable equipment operation and low noise. The top of the vibrating seat 21 is connected to the bottom of the base plate 23, and the top of the base plate 23 is connected to the bottom of the lowest screen frame 24. One end of the screen frame 24 is equipped with a discharge hopper for collecting the screened material particles. A screen assembly 3 connects two adjacent screen frames 24. The number of screening stages is determined according to actual needs. Depending on the number of screen components 3, they are stacked layer by layer, with the mesh size of the screen components 3 gradually decreasing from top to bottom, thus achieving the grading and screening of material particles. The top of the uppermost screen frame 24 is connected to the bottom of the cover plate 25, and a feed hopper is provided in the middle of the cover plate 25 to facilitate the falling of material particles into the screen frame 24 for screening. It should be noted that the bottom plate 23, screen frame 24, screen components 3, and cover plate 25 are all connected by bolts for easy disassembly and maintenance. The upper part of the screen frame 24... The bottom end is provided with a main sealing groove, and the end faces of the bottom plate 23, screen assembly 3 and cover plate 25 connected to the screen frame 24 are provided with auxiliary sealing grooves. A sealing ring 26 is provided between the main sealing groove and the auxiliary sealing groove, which can improve the sealing performance of the connection of each component. Thus, the vibrating seat 21, vibrating support column 22, bottom plate 23, screen frame 24, cover plate 25, sealing ring 26 and screen assembly 3 together constitute the screening mechanism 2. Under the action of the swinging force, the screening mechanism 2 can screen the material particles entering from the feed hopper layer by layer.

[0044] like Figures 1-8 The screen assembly 3 includes a connecting plate 31, an upper screen 32, a lower screen plate 33, a connecting rod 34, a fixing post 4, a limiting member 5, and a bouncing ball 7, specifically:

[0045] like Figures 2-6 , Figure 8The top of the connecting plate 31 is provided with an upper screen 32, and the bottom of the connecting plate 31 is provided with a lower screen plate 33. Both the upper screen 32 and the lower screen plate 33 are provided with screen holes, and the screen holes are square holes, which can screen according to the width of the material particles. It has the advantages of high screening rate and strong versatility. A connecting rod 34 is vertically sleeved on the connecting plate 31, and the connecting plate 31 is connected to the upper screen 32 and the lower screen plate 33 through the connecting rod 34. This effectively ensures the stability of the upper screen 32 and the lower screen plate 33 set on the connecting plate 31, and facilitates the disassembly and replacement of the connecting plate 31, the upper screen 32 and the lower screen plate 33.

[0046] like Figures 2-8 The bottom end of the fixed column 4 is fixedly connected to the center of the top end of the lower screen plate 33, and the top end of the fixed column 4 is in contact with the center of the bottom end of the upper screen 32. A limiting member 5 is provided between the upper screen 32 and the lower screen plate 33, and the limiting member 5 is movably sleeved with the fixed column 4. The limiting member 5 is fixed by the fixed column 4, which effectively ensures the stability of the limiting member 5 between the upper screen 32 and the lower screen plate 33 and avoids the limiting member 5 from shifting position and affecting the stability of the upper screen 32 and the lower screen plate 33. Several sets of bouncing balls 7 are provided in the limiting member 5, which can continuously bounce when the screen assembly 3 swings to clean the screen assembly 3 and prevent the screen assembly 3 from clogging.

[0047] like Figures 5-7The limiting component 5 includes a limiting ring 51 and a limiting rod 52. The two sets of bouncing balls 7 are separated by a limiting ring 51, which can separate the bouncing balls 7 into different groups, effectively preventing the bouncing balls 7 from rolling and gathering, causing over-cleaning in some areas of the screen assembly 3 and under-cleaning in some areas of the screen assembly 3. This effectively enhances the uniformity of the distribution of the bouncing balls 7 and improves the cleaning effect. The top of the limiting ring 51 contacts the bottom of the upper screen 32, and the bottom of the limiting ring 51 contacts the top of the lower screen plate 33. When the limiting ring 51 is impacted and vibrated... At the same time, it can effectively transmit the vibration force to the upper screen 32 and the lower screen plate 33 to enhance the amplitude of the upper screen 32 and the lower screen plate 33, so as to solve the problem of insignificant screening and clearing effect caused by insufficient elasticity of the bouncing ball 7. There are several limiting rings 51, and the several limiting rings 51 are concentrically set and have different diameters. The smallest limiting ring 51 is movably sleeved on the fixed column 4, so that the several limiting rings 51 are set between the upper screen 32 and the lower screen plate 33 with the fixed column 4 as the axis, thereby supporting the upper screen 32 and the lower screen plate 33 to enhance the vibration force. The deformation resistance of the upper screen 32 and the lower screen plate 33 is improved, enhancing their stability and mitigating the impact of falling material particles. This extends the service life of the upper screen 32 and the lower screen plate 33. Several limiting rings 51 are connected by limiting rods 52. There are two rows of limiting rods 52, with the bottom surface of one row of limiting rods 52 contacting the bottom surface of the upper screen 32 and the bottom surface of the other row of limiting rods 52 contacting the top surface of the lower screen plate 33. Each row of limiting rods 52 consists of four sets of limiting rods 52, and these four sets of limiting rods 52 are evenly arranged around the fixed column 4. Thus, the limiting rod 52 can effectively connect several limiting rings 51, thereby improving the stability of the connection between the several limiting rings 51. The limiting rod 52 has a triangular cross-sectional shape, and its surface is covered with an elastic silicone layer. This not only effectively cleans the surface of the bouncing ball 7 when the limiting rod 52 rubs against the bouncing ball 7 to prevent dirt from adhering to the bouncing ball 7 and affecting its normal bouncing, but also reduces the force between the limiting rod 52 and the bouncing ball 7 when they collide, thereby improving the protection of the bouncing ball 7.

[0048] The bouncing ball 7 is continuously struck by the limiting member 5 due to the swaying action, thereby expanding the impact area of ​​the bouncing ball 7 by using the limiting member 5, and transmitting the generated vibration force to the upper screen 32 and the lower screen plate 33, so as to enhance the vibration effect on the upper screen 32 and the lower screen plate 33, effectively increasing the vibration amplitude of the upper screen 32 and the lower screen plate 33, and improving the screening and unblocking effect.

[0049] Example 2, based on Example 1, such as Figures 2-8The screen assembly 3 also includes a drive component 6. Two rows of drive components 6 are embedded inside the connecting plate 31, and one row of drive components 6 corresponds in height to one row of limit rods 52. One row of drive components 6 consists of three groups of drive components 6, and each group of drive components 6 consists of four drive components 6. The three adjacent drive components 6 are located in the three groups of drive components 6, and the three groups of drive components 6 are energized in a cycle. That is, the first group of drive components 6 is energized in the first time period, the second group of drive components 6 is energized in the second time period, and the third group of drive components 6 is energized in the third time period, and so on, thereby providing magnetic force for the rotation of the four groups of limit rods 52. One drive component 6 is magnetic, and the drive component 6 is a gradient magnet. Therefore, when the drive component 6 is energized, the limit rod 52 can move towards the end of the drive component 6 with greater magnetic force due to the magnetic distribution of the drive component 6, thereby realizing the rotation of the limit rod 52.

[0050] like Figures 5-7 The end of the limiting rod 52, which is not connected to the limiting ring 51, has a magnetism opposite to that of the driving member 6, thereby providing conditions for the rotation of the limiting rod 52.

[0051] The working principle of the method of using this invention is as follows:

[0052] When screening is performed, the vibrating motor inside the vibrating seat 21 is activated to drive the entire screening mechanism 2 to swing. Material particles enter from the feed hopper of the cover plate 25, are screened by the screen assembly 3, and finally discharged from the discharge hoppers of each screen frame 24. During this process, the bouncing ball 7, under the swinging force, not only bounces and impacts the upper screen 32 and the lower screen plate 33, but also collides with the limiting ring 51. Thus, the limiting member 5 effectively expands the impact area of ​​the bouncing ball 7, allowing the vibration force generated by the limiting ring 51 to be transmitted to the upper screen 32 and the lower screen plate 33, thereby enhancing the vibration effect on the upper screen 32 and the lower screen plate 33 and increasing the vibration amplitude of the upper screen 32 and the lower screen plate 33. The screen assembly is effectively improved, enhancing the screening and clogging removal effect. Simultaneously, the limiting ring 51 supports the upper screen 32 and the lower screen plate 33, particularly the upper screen 32, thereby enhancing their resistance to deformation and improving their stability. This helps counteract the impact of falling material particles, extending the service life of the upper screen 32 and the lower screen plate 33. Furthermore, the limiting ring 51 also groups the bouncing balls 7, preventing excessive aggregation of the balls and thus avoiding over-cleaning or under-cleaning in some areas of the screen assembly 3. This effectively enhances the uniformity of the bouncing balls 7 distribution and improves the cleaning effect.

[0053] After the screening is completed, the drive unit 6 is activated, and the three sets of drive units 6 are energized in a cycle. When the drive unit 6 is energized, the drive unit 6 generates a magnetic attraction force on the end of the limit rod 52, and effectively pushes the limit rod 52 to rotate according to the change of magnetic force. This causes the limit rod 52 to effectively clean the upper screen 32, the lower screen plate 33 and the bouncing ball 7, thereby preventing powder and dirt from adhering to the bouncing ball 7 and affecting the normal bouncing of the bouncing ball 7. This effectively ensures the bouncing quality of the bouncing ball 7, and there is no need to disassemble and clean the screening mechanism 2, making the operation more convenient.

[0054] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A raw material screening device for the production of PE water supply pipes, characterized in that, include: The connecting plate (31), the upper screen (32) and the lower screen (33) are provided. The upper screen (32) is provided at the top of the connecting plate (31) and the lower screen (33) is provided at the bottom of the connecting plate (31). Fixed column (4), the bottom end of the fixed column (4) is fixedly connected to the center of the top end of the lower screen plate (33), and the top end of the fixed column (4) is in contact with the center of the bottom end of the upper screen (32); A limiting member (5) is provided between the upper screen (32) and the lower screen plate (33), and the limiting member (5) is movably connected to the fixed column (4); Bouncing ball (7), a number of bouncing balls (7) are provided inside the limiting member (5); The bouncing ball (7) is constantly impacted by the swaying action and the limiting member (5), thereby expanding the impact area of ​​the bouncing ball (7) by the limiting member (5) and transmitting the generated vibration force to the upper screen (32) and the lower screen plate (33) to enhance the vibration effect on the upper screen (32) and the lower screen plate (33) and increase the vibration amplitude of the upper screen (32) and the lower screen plate (33).

2. The raw material screening device for PE water supply pipe manufacturing according to claim 1, characterized in that, The limiting member (5) includes: The two sets of bouncing balls (7) are separated by a limiting ring (51). The top end of the limiting ring (51) is in contact with the bottom end of the upper screen (32), and the bottom end of the limiting ring (51) is in contact with the top end of the lower screen plate (33). There are several limiting rings (51), and the several limiting rings (51) are concentrically arranged and have different diameters. The smallest limiting ring (51) is movably sleeved on the fixed column (4). The limiting rods (52) are connected to the limiting rings (51) by limiting rods (52). There are two rows of limiting rods (52). The bottom surface of one row of limiting rods (52) contacts the bottom surface of the upper screen (32), and the bottom surface of the other row of limiting rods (52) contacts the top surface of the lower screen plate (33). One row of limiting rods (52) consists of four sets of limiting rods (52), and the four sets of limiting rods (52) are evenly arranged around the fixed column (4). The cross-sectional shape of the limiting rods (52) is triangular, and the surface of the limiting rods (52) is covered with a silicone layer.

3. The raw material screening device for PE water supply pipe manufacturing according to claim 2, characterized in that, A connecting rod (34) is vertically sleeved on the connecting plate (31), and the connecting plate (31) is connected to the upper screen (32) and the lower screen plate (33) through the connecting rod (34).

4. The raw material screening device for PE water supply pipe manufacturing according to claim 3, characterized in that, The connecting plate (31), upper screen (32), lower screen plate (33), connecting rod (34), fixing column (4), limiting member (5) and bouncing ball (7) are the constituent parts of the screen assembly (3).

5. The raw material screening device for PE water supply pipe manufacturing according to claim 4, characterized in that, The screen assembly (3) further includes: The drive component (6) has two rows of drive components (6) embedded inside the connecting plate (31), and one row of drive components (6) corresponds to the height of one row of limit rods (52). One row of drive components (6) consists of three groups of drive components (6), and each group of drive components (6) consists of four drive components (6). The three adjacent drive components (6) are located in the three groups of drive components (6), and the three groups of drive components (6) are cyclically energized. One drive component (6) is magnetic, and the drive component (6) is a gradient magnet.

6. The raw material screening device for PE water supply pipe manufacturing according to claim 5, characterized in that, The end of the limiting rod (52) that is not connected to the limiting ring (51) has a magnetism opposite to that of the driving member (6).

7. The raw material screening device for PE water supply pipe manufacturing according to claim 6, characterized in that, The screen assembly (3) is a component of the screening mechanism (2), and the screening mechanism (2) is located at the top of the base (1).

8. The raw material screening device for PE water supply pipe manufacturing according to claim 7, characterized in that, The screening mechanism (2) further includes: Vibration seat (21), wherein a vibration motor is provided inside the vibration seat (21); Vibration support column (22), one end of which is fixedly connected to the side wall of the vibration seat (21), and the other end of which is fixedly connected to the top of the base (1); The bottom plate (23) is connected to the bottom end of the vibrating seat (21); The top of the bottom plate (23) is connected to the bottom of the screen frame (24), and a discharge hopper is provided at one end of the screen frame (24). A screen assembly (3) is connected between two adjacent screen frames (24). The top end of the screen frame (24) is at the bottom end of the cover plate (25), and a feed hopper is provided in the middle of the cover plate (25); A sealing ring (26) is provided at the upper and lower ends of the screen frame (24), and an auxiliary sealing groove is provided at the end faces of the bottom plate (23), screen assembly (3) and cover plate (25) connected to the screen frame (24). A sealing ring (26) is provided between the main sealing groove and the auxiliary sealing groove.

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