Feeding equipment for PE pipe production

Abstract

The utility model discloses feeding equipment for PE (polyethylene) pipe production, which comprises an air duct, a first fan, a heater, a separation net, a pushing mechanism, a screen, a vibrator, a partition plate, a cover, a negative pressure dust collector, a collecting hopper and a conveying pipe. According to the device, moisture on the surfaces of HDPE resin particles can be removed through the matching effect of the heater and the first fan, and air with moisture can be sucked away through the negative pressure dust collector; dust attached to the surfaces of HDPE resin particles can be blown away into the air through the first fan, and the dust can be brought to the position below the negative pressure dust collector and sucked away through the arc surface of the cover; hDPE resin particles with large particle sizes can be screened out through the screen with the vibrator; all the operations can improve the quality of the HDPE resin particles fused by the melting equipment.

Description

Feeding equipment for PE pipe production Technical Field

[0001] This utility model relates to the technical field of PE pipe production equipment, and in particular to a feeding device for PE pipe production. Background Technology

[0002] PE pipes have a wide range of applications. Water supply pipes and gas pipes are their two largest markets. PE resin is polymerized from ethylene monomers. Due to differences in polymerization reaction conditions such as pressure and temperature, resins of different densities can be obtained, resulting in high-density polyethylene, medium-density polyethylene, and low-density polyethylene. When processing different types of PE pipes, different resin grades are selected according to their application conditions, and the requirements for extruders and molds also differ. PE pipe production generally uses HDPE resin granules, and the feeding equipment is used to feed these granules into the melting equipment. Existing feeding equipment has the following problems:

[0003] 1. It cannot absorb moisture from the surface of HDPE resin particles, which affects the quality of the finished PE pipe.

[0004] 2. It cannot remove dust from HDPE resin particles, which affects the finished PE pipe.

[0005] 3. It cannot screen out large HDPE resin particles, which may result in poor fusion effect in the melting equipment.

[0006] Therefore, it is necessary to develop feeding equipment for PE pipe production to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to design a feeding device for PE pipe production in order to solve the above problems.

[0008] This utility model achieves the above objectives through the following technical solutions:

[0009] Feeding equipment for PE pipe production includes:

[0010] Air duct; air duct installed vertically;

[0011] The first fan is installed at the lower end of the air duct, and the air generated by the first fan blows vertically upward along the air duct.

[0012] Heater; The heater is installed inside the air duct;

[0013] Isolation netting; isolation netting fully covers the top of the air duct;

[0014] Pushing mechanism; The pushing mechanism is installed on the first side of the isolation net and is used to push HDPE resin granules above the isolation net;

[0015] Screen; the screen is installed on the second side of the isolation net; the screen and the isolation net are set on the same horizontal plane;

[0016] Vibrator; the bottom of the screen is connected to the vibrator;

[0017] Partition; the screen and the isolation mesh are separated by a partition;

[0018] Cover; The cover is installed on top of the screen and the isolation net, and the side wall of the cover near the isolation net and the inner top side form a continuous arc surface;

[0019] Negative pressure vacuum cleaner; The negative pressure vacuum cleaner is installed on top of the cover, at the end away from the isolation net;

[0020] The upper part of the collecting hopper is positioned below the screen.

[0021] Conveying pipe; the upper end of the conveying pipe is connected to the lower end of the collecting hopper, and the lower end of the conveying pipe is used to convey HDPE resin particles to the melting equipment.

[0022] The beneficial effects of this utility model are as follows:

[0023] The heater and the first fan work together to remove moisture from the surface of HDPE resin particles, and the negative pressure vacuum cleaner can suck away the moisture-laden air.

[0024] The first fan can blow the dust adhering to the surface of HDPE resin particles into the air, and the curved surface of the cover can bring the dust to the bottom of the negative pressure vacuum cleaner and suck it away.

[0025] Larger HDPE resin particles can be removed by using a vibrating screen.

[0026] All of the above operations can improve the quality of HDPE resin granules after they have been fused by the melting equipment. Attached Figure Description

[0027] Figure 1 is a schematic diagram of the structure of this application;

[0028] Figure 2 is a schematic diagram of the layout structure of the second and third screens in this application;

[0029] Figure 3 is a schematic diagram of the connection structure between the hydraulic cylinder and the push plate in this application;

[0030] Figure 4 is a schematic diagram of the installation structure of the second and third screens in this application;

[0031] Figure 5 is a schematic diagram of the structure of the material collection hopper in this application.

[0032] Legend: 1-First mounting box, 2-Second mounting box, 3-Feed hopper, 4-Hydraulic cylinder, 5-Push plate, 6-First fan, 7-Air duct, 8-Heater, 9-Isolation net, 10-Baffle plate, 11-Cover, 12-Second fan, 13-Negative pressure cover, 14-First screen, 15-Second screen, 16-Third mounting box, 17-First mounting base, 18-First bearing, 19-First rotating shaft, 20-First vibrator, 21-Second mounting base, 22-Second bearing, 23-Second rotating shaft, 24-Second vibrator, 25-Collection hopper, 26-Conveying pipe, 27-Hinge, 28-Lock. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0038] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0040] As shown in Figures 1, 2, and 5, the feeding equipment for PE pipe production includes:

[0041] Air duct 7; Air duct 7 is installed vertically;

[0042] First fan 6; First fan 6 is installed at the lower end of air duct 7, and the air generated by first fan 6 blows vertically upward along air duct 7;

[0043] Heater 8; Heater 8 is installed inside air duct 7;

[0044] Isolation net 9; Isolation net 9 fully covers the top of air duct 7;

[0045] Pushing mechanism; The pushing mechanism is installed on the first side of the isolation net 9 and is used to push HDPE resin particles above the isolation net 9;

[0046] Screen; the screen is installed on the second side of the isolation net 9; the screen and the isolation net 9 are set on the same horizontal plane;

[0047] Vibrator; the bottom of the screen is connected to the vibrator;

[0048] Partition 10; The screen and the isolation net 9 are separated by partition 10; The partition 10 is set to prevent HDPE resin particles that have not been dehumidified from directly entering the screen and to prevent HDPE resin particles on the screen from being transferred to the isolation net 9.

[0049] Cover 11; Cover 11 is installed on top of screen and isolation net 9, and the side wall and top inner side of cover 11 near isolation net 9 form a continuous arc surface; The function of setting the arc surface is: HDPE resin particles blown by the first fan 6 are all moved to the top of screen under the guidance of the arc surface, and then fall down. The arc surface plays the role of conveying HDPE resin particles.

[0050] Negative pressure vacuum cleaner; The negative pressure vacuum cleaner is installed above the top of the cover 11 and at the end away from the isolation net 9;

[0051] Collecting hopper 25; the upper end of collecting hopper 25 is positioned below the screen.

[0052] Conveying pipe 26; The upper end of conveying pipe 26 is connected to the lower end of collecting hopper 25, and the lower end of conveying pipe 26 is used to convey HDPE resin particles to melting equipment.

[0053] As shown in Figures 1, 2, and 5, the pushing mechanism includes a hydraulic cylinder 4 and a push plate 5. The piston rod of the hydraulic cylinder 4 is connected to the middle of the first side of the push plate 5, and the hydraulic cylinder 4 is horizontally positioned.

[0054] As shown in Figure 3, the feeding equipment for PE pipe production also includes a second mounting box 2 and a feeding hopper 3. The upper middle part of the second mounting box 2 is connected to the lower end of the feeding hopper 3. The hydraulic cylinder 4 is fixedly installed inside the second mounting box 2. One end of the second mounting box 2 is connected to the upper part of the isolation net 9 through an opening. It should be noted that the height of the push plate 5 is slightly less than the height of the internal cavity of the second mounting box 2; and, after the piston rod of the hydraulic cylinder 4 is fully retracted, the feeding hopper 3 can only discharge material from the side of the push plate 5 away from the hydraulic cylinder 4. This arrangement is to prevent HDPE resin particles from entering between the push plate 5 and the hydraulic cylinder 4.

[0055] As shown in Figure 1, a first mounting box 1 for support is provided at the lower end of the second mounting box 2. The first mounting box 1 is installed on the second side of the air duct 7, and the first side and the second side of the air duct 7 are opposite sides.

[0056] As shown in Figure 1, the negative pressure vacuum cleaner includes multiple second fans 12 and a negative pressure hood 13. The air inlets of the multiple second fans 12 are connected to the top of the negative pressure hood 13, and the lower opening of the negative pressure hood 13 is connected to the cover 11. It should be noted that a mesh screen is provided at the bottom opening of the negative pressure hood 13. The mesh screen is designed to prevent the negative pressure vacuum cleaner from directly sucking in HDPE resin particles.

[0057] As shown in Figure 1, the width of the cover 11 is the same as the length of the negative pressure cover 13. This allows for the absorption of as much dust as possible. The negative pressure vacuum cleaner can absorb not only the dust blown in by the first fan 6, but also the dust stirred up by the vibrator.

[0058] As shown in Figures 2 and 4, the feeding equipment for PE pipe production also includes a third mounting box 16, two first mounting seats 17, two first bearings 18, two first rotating shafts 19, two second mounting seats 21, two second bearings 22, and two second rotating shafts 23. The screen includes a first screen 14 and a second screen 15. The vibrator includes a first vibrator 20 and a second vibrator 24. The first vibrator 20 is installed below the first screen 14, and the second vibrator 24 is installed below the second screen 15. The third mounting box 16 is installed on the first side of the air duct 7. The two first mounting seats 17 and the two second mounting seats 21 are respectively installed at the four corners of the top of the third mounting box 16. The first bearings 18 are installed inside the first mounting seats 17, and the second bearings 22 are installed inside the first mounting seats 17. Inside the second mounting base 21, the two ends of the first rotating shaft 19 are respectively installed in the two first mounting bases 17, and the two ends of the second rotating shaft 23 are respectively installed in the two second mounting bases 21. The first end of the first screen 14 is connected to the middle of the first rotating shaft 19, and the first end of the second screen 15 is connected to the middle of the second rotating shaft 23. The first rotating shaft 19 and the second rotating shaft 23 are parallel to each other and are both perpendicular to the partition 10. The second ends of the first screen 14 and the second screen 15 are placed at the top edge of the third mounting box 16 (this arrangement is to maintain the horizontal posture of the first screen 14 and the second screen 15). The second ends of the first screen 14 and the second screen 15 are both the ends away from the isolation net 9. In this embodiment, the first screen 14 can rotate around the axis of the first rotating shaft 19, and the second screen 15 can rotate around the axis of the second rotating shaft 23.

[0059] As shown in Figure 1, the cover 11 includes two oppositely arranged side plates and a fixing plate. The first end of the side plate is connected to the side wall of the second mounting box 2 by a hinge 27, and the second end of the side plate is connected to the side wall of the cover 11 near the isolation net 9 by a latch 28. In this embodiment, when it is necessary to remove unqualified large HDPE resin particles on the first screen 14 and the second screen 15 (taking the operation of the first screen 14 as an example), the connection between the side plate and the cover 11 is released by the latch 28. Then, the side plate is rotated outward by the hinge 27. At this time, the first screen 14 is rotated around the axis of the first rotating shaft 19 until the first screen 14 is moved out of the cover 11. Then, the first vibrator 20 is started, and the unqualified HDPE resin particles fall out of the first screen 14. The fallen HDPE resin particles can be collected in a container for subsequent processing and reuse. After the unqualified HDPE resin particles on the first screen 14 are cleaned, the first screen 14 is rotated again until the second end of the first screen 14 is placed at the top edge of the third mounting box 16. Then, the side plate is closed, and the side plate is connected to the cover 11 by the latch 28.

[0060] As shown in Figures 1 and 2, the widths of the first screen 14 and the second screen 15 are both smaller than the height of the side plate. This arrangement is intended to ensure that the first screen 14 / second screen 15 can be flipped out from inside the cover 11.

[0061] In some embodiments, an electrostatic eliminator is also installed in the air duct 7 to prevent stubborn adsorption of electrostatic dust on HDPE resin particles.

[0062] Working principle: First, a fixed amount of untreated HDPE resin granules are fed into the second mounting box 2 through the feed hopper 3. The first blower 6, the second blower 12, and the heater 8 are started. Then, the hydraulic cylinder 4 is activated to push the pusher plate 5 to push the HDPE resin granules above the isolation screen 9. Hot air blows the HDPE resin granules up and guides them along the arc surface to the top of the screen, where they fall. During this process, the moisture and dust on the surface of the HDPE resin granules are blown away and sucked away by the negative pressure vacuum cleaner. The HDPE resin granules that fall onto the screen are screened by the vibrator. HDPE resin granules of suitable size fall downward into the collection hopper 25 and are finally transported to the melting equipment through the conveying pipe 26. After a period of operation, the screen is turned over for cleaning.

[0063] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A feeding device for PE pipe production, characterized in that, include: Air duct; Vertically installed air duct; First fan; The first fan is installed at the lower end of the air duct, and the air generated by the first fan blows vertically upward along the air duct; Heater; The heater is installed inside the air duct; Isolation net; The isolation net is set to fully cover the top of the air duct; Pushing mechanism; The pushing mechanism is installed on the first side of the isolation net and is used to push HDPE resin particles above the isolation net; Screen; The screen is installed on the second side of the isolation net; The screen and the isolation net are set on the same horizontal plane; Vibrator; The bottom of the screen is connected to the vibrator; Partition; The screen and the isolation net are separated by a partition; Cover; The cover is installed on top of the screen and the isolation net, and the side wall of the cover near the isolation net and the inner top of the cover form a continuous arc surface; Negative pressure vacuum cleaner; The negative pressure vacuum cleaner is installed on the top of the cover and at the end away from the isolation net; the collection hopper; the upper end of the collection hopper is placed below the screen; the conveying pipe; the upper end of the conveying pipe is connected to the lower end of the collection hopper, and the lower end of the conveying pipe is used to convey HDPE resin granules to the melting equipment.

2. The feeding equipment for PE pipe production according to claim 1, characterized in that, The pushing mechanism includes a hydraulic cylinder and a push plate. The piston rod of the hydraulic cylinder is connected to the middle of the first side of the push plate, and the hydraulic cylinder is set horizontally.

3. The feeding equipment for PE pipe production according to claim 1, characterized in that, The feeding equipment for PE pipe production also includes a second mounting box and a feeding hopper. The upper middle part of the second mounting box is connected to the lower end of the feeding hopper. The hydraulic cylinder is fixedly installed inside the second mounting box. One end of the second mounting box is connected to the upper part of the isolation net through a set opening.

4. The feeding equipment for PE pipe production according to claim 1, characterized in that, The negative pressure vacuum cleaner includes multiple secondary fans and a negative pressure hood. The air inlets of the multiple secondary fans are connected to the top of the negative pressure hood, and the lower opening of the negative pressure hood is connected to the hood.

5. The feeding equipment for PE pipe production according to claim 4, characterized in that, The width of the cover is the same as the length of the negative pressure cover.

6. The feeding equipment for PE pipe production according to claim 3, characterized in that, The feeding equipment for PE pipe production also includes a third mounting box, two first mounting seats, two first bearings, two first rotating shafts, two second mounting seats, two second bearings, and two second rotating shafts. The screens include a first screen and a second screen. The vibrator includes a first vibrator and a second vibrator. The first vibrator is installed below the first screen, and the second vibrator is installed below the second screen. The third mounting box is installed on the first side of the air duct. The two first mounting seats and two second mounting seats are respectively installed at the four corners of the top of the third mounting box. The first bearing is installed inside the first mounting seat, and the second bearing is installed inside the second mounting seat. The two ends of the first rotating shaft are respectively installed inside the two first mounting seats, and the two ends of the second rotating shaft are respectively installed inside the two second mounting seats. The first end of the first screen is connected to the middle of the first rotating shaft, and the first end of the second screen is connected to the middle of the second rotating shaft. The first and second rotating shafts are parallel to each other and perpendicular to the partition. The second ends of the first and second screens are placed at the top edge of the third mounting box, and both the second ends of the first and second screens are the ends furthest from the isolation screen.

7. The feeding equipment for PE pipe production according to claim 6, characterized in that, The cover includes two oppositely arranged side panels and a fixing plate. The first end of the side panel is connected to the side wall of the second mounting box by a hinge, and the second end of the side panel is connected to the side wall of the cover near the isolation net by a latch.

8. The feeding equipment for PE pipe production according to claim 7, characterized in that, The width of both the first and second screens is less than the height of the side plates.

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