Extrusion device for large-diameter PE water supply pipe production

Abstract

The invention relates to the technical field of water supply pipe extrusion, in particular to an extrusion device for large-diameter PE water supply pipe production. Comprising a base, the base is provided with a shell, an outer container is fixedly connected into the shell, the outer container is provided with an outer forming device, the outer forming device is in a circular truncated cone shape, the shell is provided with a plurality of first electric push rods which are evenly distributed in the circumferential direction, and telescopic parts of the first electric push rods penetrate through the outer container and are fixedly connected with limiting pieces; the limiting piece is made of elastic materials, the limiting piece is located in the outer forming device, an inner container is arranged in the outer container, and an inner forming device is arranged in the inner container. The head material of the raw material is limited through the limiting piece, in the process that the PE pipe is discharged and the pipe diameter of the PE pipe is gradually reduced, the head material amount of the PE pipe is reduced and gradually polymerized and formed through guiding of the limiting piece, the shape of the head material of the PE pipe is uniform, the waste amount of the head material in the PE pipe forming process is reduced, and the forming quality of the PE pipe is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of water supply pipe extrusion technology, and in particular to an extrusion device for producing large-diameter PE water supply pipes. Background Technology

[0002] Large-diameter PE (polyethylene) water supply pipes are widely used in modern municipal engineering, agricultural irrigation, and water conservancy transportation due to their advantages such as corrosion resistance, impact resistance, long service life, and convenient installation. Currently, in the continuous extrusion production process of PE pipes, the raw material is heated and plasticized and then extruded from the annular chamber to form a pipe blank. The pipe blank is then fixed on the guide, pulled out, and cooled and shaped to form the finished product. However, due to the different diameters of different types of PE pipes, the size of the guides used in the production of different PE pipes varies. The pipe blank needs to be deformed before it can be fixed on different types of guides. This means that the initial raw material connected to the guide (commonly known as "head material") cannot immediately form a regular pipe shape. This head material has an extremely irregular shape, which not only affects the quality of the PE pipe, but also, after production is completed, this deformed head material can usually only be cut off as waste, thus causing waste of head material in the PE pipe forming process. Summary of the Invention

[0003] In order to overcome the shortcomings mentioned in the background art, the present invention provides an extrusion device for the production of large-diameter PE water supply pipes.

[0004] The technical solution is: an extrusion device for producing large-diameter PE water supply pipes, comprising a base, a housing mounted on the base, an outer liner fixedly connected inside the housing, an outer forming device disposed on the outer liner, the outer forming device being frustoconical, a plurality of first electric push rods evenly distributed circumferentially mounted on the housing, the telescopic portion of the first electric push rods passing through the outer liner and fixedly connected to a limiting member, the limiting member being made of elastic material, the portion of the limiting member away from the outer liner being V-shaped, the limiting member being located inside the outer forming device, an inner liner disposed inside the outer liner, an inner forming device disposed inside the inner liner, the limiting member contacting the outer forming device, and the limiting member not contacting the inner forming device.

[0005] Furthermore, the outer forming device is composed of a number of linearly distributed first connecting rings, and the inner diameter of all the first connecting rings gradually decreases from the point near the outer liner to the point far away, with adjacent first connecting rings fitting together.

[0006] Furthermore, the base is provided with an electric slide rail, in which an electromagnetic slider is slidably connected. The electromagnetic slider is fixedly connected to a support block, which is used to support all the first connecting rings.

[0007] Furthermore, the support block is provided with a number of pins equal to the number of the first connecting rings, and the pins are used to insert into the corresponding first connecting rings to limit the position of all the first connecting rings.

[0008] Furthermore, the inner forming device consists of second connecting rings arranged in a straight line and having the same number as the first connecting rings. The outer diameter of all the second connecting rings decreases sequentially from the point closer to the outer liner to the point farther away, and adjacent second connecting rings are slidably connected.

[0009] Furthermore, the second connecting ring is aligned with the corresponding first connecting ring.

[0010] Furthermore, a second electric push rod is installed inside the inner liner. The telescopic part of the second electric push rod is fixedly connected to a limiting plate. The limiting plate is fixedly connected to a second connecting ring located away from the outer liner. Except for the second connecting ring near the inner liner, all other second connecting rings are fixedly connected to limiting pins. The limiting plate is used to drive the adjacent limiting pins to move, so that the limiting pins drive the second connecting rings on them to move. The second connecting rings are used to drive the limiting pins on the adjacent second connecting rings near the outer liner to move. An elastic element is fixedly connected between two adjacent limiting pins.

[0011] Furthermore, the elastic coefficient of the elastic element on all the limiting pins decreases sequentially from the point closer to the outer liner to the point farther away.

[0012] Furthermore, the base is detachably connected to a mounting shell, which is used to fit against the first connecting ring away from the outer shell. The base is equipped with a third electric push rod, and the telescopic part of the third electric push rod is fixedly connected to a docking frame. The docking frame is detachably connected to the mounting shell and is used to drive the mounting shell to move. The limiting plate is detachably connected to an inner support rod located inside the mounting shell.

[0013] Furthermore, the diameter of the inner support rod gradually increases from near the limiting disc to far away from it.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention limits the head of the raw material by using a limiting member. During the discharge of PE pipe and the gradual reduction of its diameter, the limiting member guides the reduction of the PE pipe head and gradually polymerizes and forms it, making the PE pipe head shape uniform, reducing the amount of head material wasted during the PE pipe forming process, and ensuring the quality of PE pipe forming. By disengaging the limiting member from the corresponding first connecting ring, the corresponding first connecting ring falls off, so that first connecting rings with different inner diameters are located at the discharge port of the outer forming device. The amount of raw material blocked by the limiting member changes accordingly, thereby forming PE pipes of different diameters and improving the applicability of the device. Furthermore, according to the amount of all first connecting rings falling off, the amount of movement of all second connecting rings is adjusted accordingly, so that the limiting plate is aligned with the first connecting rings that have not fallen off, ensuring the forming of different types of PE pipes and improving the applicability of the device. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural cross-sectional view of the base, housing, and mounting shell of the present invention; Figure 3 This is a three-dimensional structural diagram of the support block of the present invention; Figure 4 This is a three-dimensional structural diagram of the limiting component of the present invention; Figure 5 This is a three-dimensional structural cross-sectional view of the first connecting ring and the second connecting ring of the present invention.

[0016] Reference numerals: 1-base, 2-shell, 3-outer liner, 4-outer forming device, 401-first connecting ring, 5-first electric push rod, 6-limiting component, 7-electromagnetic slider, 8-support block, 9-pin, 10-inner liner, 11-inner forming device, 1101-second connecting ring, 12-second electric push rod, 13-limiting plate, 14-limiting pin, 15-mounting shell, 16-third electric push rod, 17-connecting frame, 18-inner support rod. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Example 1 An extrusion device for producing large-diameter PE water supply pipes, such as Figures 1-5As shown, the device includes a base 1, a control terminal (not shown in the figure) mounted on the base 1, a housing 2 mounted on the base 1, an outer shell 3 fixedly connected inside the housing 2, an outer forming device 4 mounted on the outer shell 3, the outer forming device 4 being frustoconical in shape, and several first electric push rods 5 evenly distributed circumferentially on the housing 2, each electrically connected to the control terminal. The telescopic portion of the first electric push rod 5 passes through the outer shell 3 and is fixedly connected to a limiting member 6. The inclination angle of the first electric push rod 5 is the same as the inclination angle of the adjacent generatrix on the inner side of the outer forming device 4. The limiting member 6 is elastic. Material: The telescopic part of the first electric push rod 5 is used to drive the movement of the limiting member 6. The limiting member 6 conforms to the inner wall of the outer forming device 4 through its own deformation. The part of the limiting member 6 away from the outer liner 3 is V-shaped, which is used to limit the material to control the amount of material head during extrusion and reduce the amount of material wasted due to head deformation. The limiting member 6 is located inside the outer forming device 4. The outer liner 3 is provided with an inner liner 10. A cavity for material to pass through is formed between the outer liner 3 and the inner liner 10 to form the material. Base 1 The left side of the shell 2, outer liner 3, and inner liner 10 is the existing structure, and only a part of it is shown in the figure. The unshown part of the left side of the outer liner 3 is equipped with a heater for melting raw materials and an auger for conveying raw materials. The inner liner 10 is equipped with an inner forming device 11. In this embodiment, different models of inner forming devices 11 can be replaced to adapt to the production of different models of PE pipes. The limiting member 6 is in contact with the outer forming device 4, but not with the inner forming device 11. The inner forming device 11 is located inside the outer forming device 4. A chamber for raw material forming is provided between the outer forming device 4 and the inner forming device 11. The limiting member 6 limits the head of the raw material. During the process of PE pipe discharge and its pipe diameter gradually decreasing, the limiting member 6 guides the head of the pipe to reduce the amount of pipe head and gradually polymerize and form it, so that the shape of the PE pipe head is uniform, reducing the amount of head waste during the PE pipe forming process and ensuring the quality of PE pipe forming. After the PE pipe is discharged between the outer forming device 4 and the inner forming device 11, the formed PE pipe is gradually pulled to the right by the existing guide.

[0019] like Figures 2-5As shown, the outer forming device 4 consists of several linearly distributed first connecting rings 401. The inner diameter of all the first connecting rings 401 gradually decreases from left to right. Adjacent first connecting rings 401 fit together. The telescopic part of the first electric push rod 5 is used to drive the limiting member 6 to move, so that the limiting member 6 disengages from the corresponding first connecting ring 401. The corresponding first connecting ring 401 falls off, so that the first connecting rings 401 with different inner diameters are located on the rightmost side of the outer forming device 4. The amount of raw material blocked by the limiting member 6 changes accordingly, thereby forming PE pipes of different diameters and improving the applicability of this device. The base 1 is provided with an electric slide rail that is electrically connected to the control terminal. An electromagnetic slider 7 is slidably connected in the electric slide rail. The electromagnetic slider 7 is fixedly connected to a support block 8. The support block 8 is used to support all the first connecting rings 401. The support block 8 is provided with the same number of pins 9 as the number of first connecting rings 401. The pins 9 are used to insert into the corresponding first connecting ring 401 to limit all the first connecting rings 401.

[0020] The specific working principle is as follows: When the operator needs to use this device to produce PE pipes, the operator adds the raw material between the outer liner 3 and the inner liner 10. The heater and auger of the outer liner 3 melt and transport the raw material, causing the raw material to move from left to right. The outer forming device 4 and the inner forming device 11 guide the raw material, causing it to gradually form. After the PE pipe is discharged between the outer forming device 4 and the inner forming device 11, the formed PE pipe is gradually pulled out to the right by the existing guide.

[0021] During the molding process of PE pipe, the head of the raw material is limited by the limiting component 6. As the PE pipe is discharged and its diameter gradually decreases, the limiting component 6 guides the head of the pipe to reduce its amount and gradually polymerize and form, making the head of the PE pipe uniform in shape, reducing the amount of head waste in the molding process of PE pipe, and ensuring the quality of PE pipe molding.

[0022] When it is necessary to produce PE pipes with different outer diameters, the operator activates all the first electric push rods 5 through the control terminal. The telescopic part of the first electric push rod 5 drives the limiting member 6 to move, causing the limiting member 6 to disengage from the corresponding first connecting ring 401. Taking the rightmost first connecting ring 401 as an example, after the rightmost first connecting ring 401 disengages, the operator activates the electromagnetic slide rail of the base 1 through the control terminal. The electromagnetic slider 7 drives all the pins 9 to move downward through the support block 8. The remaining pins 9 disengage from the corresponding first connecting ring 401. The disengaged first connecting ring 401 moves downward under the influence of gravity. The pins 9 fix the disengaged first connecting ring 401. The disengaged first connecting ring 401 moves downward until it is misaligned with the corresponding first connecting ring 401, so that the first connecting rings 401 with different inner diameters are located on the rightmost side of the outer forming device 4. The amount of raw material blocked by the limiting member 6 changes accordingly, thereby forming PE pipes of different diameters and improving the applicability of this device.

[0023] After the PE pipe production is completed, the operator cleans the device and then opens the electromagnetic slide rail of the base 1 through the control terminal. The electromagnetic slider 7 drives all the pins 9 to move upward and reset through the support block 8. The right pin 9 drives the right first connecting ring 401 to move upward and reset. The remaining pins 9 reset and are inserted back into all the first connecting rings 401. Finally, the electromagnetic slide rail of the base 1 is closed through the control terminal.

[0024] Example 2 Based on Example 1, such as Figures 3-5As shown, the inner forming device 11 consists of second connecting rings 1101 arranged in a straight line, with the same number as the first connecting rings 401. The outer diameter of all the second connecting rings 1101 decreases from left to right. Adjacent second connecting rings 1101 are slidably connected. The second connecting rings 1101 are aligned with the corresponding first connecting rings 401. A second electric push rod 12 electrically connected to the control terminal is installed inside the inner liner 10. The telescopic part of the second electric push rod 12 is fixedly connected to a limiting plate 13. The limiting plate 13 is fixedly connected to the second connecting ring 1101 on the right side. Except for the leftmost second connecting ring 1101, all the other second connecting rings 1101 are connected to the first connecting ring 401. Each connecting ring 1101 is fixedly connected to a limit pin 14. During the leftward movement of the limit member 6, the control terminal activates the second electric push rod 12. The telescopic part of the second electric push rod 12 drives the limit plate 13 to move to the left. The limit plate 13 moves to the left until it contacts the right-side limit pin 14. The limit plate 13 then drives the right-side limit pin 14 to move, which in turn drives the second connecting ring 1101 on it to move to the left. This continues until the right-side second connecting ring 1101 reaches its limit state. Then, the right-side second limit pin 14 drives the right-side second connecting ring 1101 to move to the left. Subsequently, the right-side second connecting ring... 1101 moves to move the third right-side limiting pin 14. An elastic element, specifically a tension spring, is fixed between adjacent limiting pins 14. As the limiting pin 14 moves to the left, the elastic element is stretched, causing all second connecting rings 1101 to move sequentially to the left from right to left. The elastic coefficient of all elastic elements on the limiting pin 14 decreases sequentially from left to right, causing all elastic elements to be stretched sequentially from right to left. Based on the amount of all first connecting rings 401 that have fallen, the amount of leftward movement of all second connecting rings 1101 is adjusted accordingly, so that the right side of the limiting plate 13 is aligned with the rightmost unfallen first connecting ring. The right side of 401 remains flush to ensure the molding of different types of PE pipes and improve the applicability of this device. After the PE pipe is produced, all first connecting rings 401 are reset through the above steps. Then, the telescopic part of the second electric push rod 12 is extended by controlling the control terminal. The telescopic part of the second electric push rod 12 drives the limit plate 13 to move to the right, and the elastic element of the limit pin 14 is reset, so that all limit pins 14 and all second connecting rings 1101 move to the right and reset. After the second connecting rings 1101 that have moved to the left move to the right and reset, the second electric push rod 12 is turned off by the control terminal.

[0025] Example 3 Based on Example 2, such as Figure 2 and Figure 3As shown, the base 1 is detachably connected to a mounting shell 15. The mounting shell 15 is used to fit against the first connecting ring 401 away from the outer liner 3. The mounting shell 15 can be disassembled and replaced with mounting shells of different inner diameters. After the mounting shell 15 is installed on the base 1, it can slide on the base 1. The base 1 is equipped with a third electric push rod 16 electrically connected to the control terminal. The telescopic part of the third electric push rod 16 is fixedly connected to a docking frame 17. The telescopic part of the third electric push rod 16 is used to drive the docking frame 17 to move left and right to adjust the position of the mounting shell 15 so that the mounting shell 15 fits against the outer liner 3. On the right side of the second connecting ring 1101, the docking frame 17 is detachably connected to the mounting shell 15. The docking frame 17 is used to drive the mounting shell 15 to move. The limiting plate 13 is detachably connected to the inner support rod 18 located inside the mounting shell 15. By replacing the inner support rod 18 with different diameters, it can adapt to the production of different PE pipes. The diameter of the inner support rod 18 gradually increases from left to right, thereby gradually reducing the gap volume between the mounting shell 15 and the inner support rod 18 from left to right, improving the compactness of the raw material between the mounting shell 15 and the inner support rod 18 after molding, and ensuring the quality of the PE pipe after production.

[0026] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An extrusion device for producing large-diameter PE water supply pipes, comprising a base (1), a housing (2) mounted on the base (1), an outer liner (3) fixedly connected inside the housing (2), and an outer forming device (4) provided on the outer liner (3), the outer forming device (4) being frustoconical in shape, characterized in that, The housing (2) is equipped with a plurality of first electric push rods (5) evenly distributed in the circumference. The telescopic part of the first electric push rod (5) passes through the outer liner (3) and is fixedly connected to a limiting member (6). The limiting member (6) is made of elastic material. The part of the limiting member (6) away from the outer liner (3) is V-shaped. The limiting member (6) is located inside the outer forming device (4). An inner liner (10) is provided inside the outer liner (3). An inner forming device (11) is provided in the inner liner (10). The limiting member (6) is in contact with the outer forming device (4). The limiting member (6) is not in contact with the inner forming device (11).

2. The extrusion apparatus for producing large-diameter PE water supply pipes according to claim 1, characterized in that, The outer forming device (4) is composed of a number of first connecting rings (401) arranged in a straight line. The inner diameter of all the first connecting rings (401) gradually decreases from the point near the outer liner (3) to the point far away. Two adjacent first connecting rings (401) fit together.

3. The extrusion apparatus for producing large-diameter PE water supply pipes according to claim 1, characterized in that, The base (1) is provided with an electric slide rail, and an electromagnetic slider (7) is slidably connected in the electric slide rail. The electromagnetic slider (7) is fixedly connected to a support block (8), which is used to support all the first connecting rings (401).

4. The extrusion apparatus for producing large-diameter PE water supply pipes according to claim 3, characterized in that, The support block (8) is provided with the same number of pins (9) as the first connecting rings (401). The pins (9) are used to insert into the corresponding first connecting rings (401) to limit all the first connecting rings (401).

5. An extrusion apparatus for producing large-diameter PE water supply pipes according to claim 1, characterized in that, The inner forming device (11) consists of second connecting rings (1101) arranged in a straight line and having the same number as the first connecting rings (401). The outer diameter of all the second connecting rings (1101) decreases sequentially from the point near the outer liner (3) to the point far away. Adjacent second connecting rings (1101) are slidably connected.

6. The extrusion apparatus for producing large-diameter PE water supply pipes according to claim 5, characterized in that, The second connecting ring (1101) is aligned with the corresponding first connecting ring (401).

7. An extrusion apparatus for producing large-diameter PE water supply pipes according to claim 5, characterized in that, A second electric push rod (12) is installed inside the inner liner (10). The telescopic part of the second electric push rod (12) is fixedly connected to a limiting plate (13). The limiting plate (13) is fixedly connected to a second connecting ring (1101) located away from the outer liner (3). Except for the second connecting ring (1101) near the inner liner (10), all other second connecting rings (1101) are fixedly connected to limiting pins (14). The limiting plate (13) is used to drive the adjacent limiting pins (14) to move, so that the limiting pins (14) drive the second connecting rings (1101) on them to move. The second connecting rings (1101) are used to drive the limiting pins (14) on the adjacent second connecting rings (1101) near the outer liner (3) to move. An elastic element is fixedly connected between two adjacent limiting pins (14).

8. An extrusion apparatus for producing large-diameter PE water supply pipes according to claim 7, characterized in that, The elastic coefficient of the elastic element on all the limiting pins (14) decreases sequentially from the point closer to the outer liner (3) to the point farther away.

9. An extrusion apparatus for producing large-diameter PE water supply pipes according to claim 1, characterized in that, The base (1) is detachably connected to a mounting shell (15), which is used to fit against the first connecting ring (401) away from the outer shell (3). The base (1) is equipped with a third electric push rod (16), and the telescopic part of the third electric push rod (16) is fixedly connected to a docking frame (17). The docking frame (17) is detachably connected to the mounting shell (15), and the docking frame (17) is used to drive the mounting shell (15) to move. The limiting plate (13) is detachably connected to an inner support rod (18) located inside the mounting shell (15).

10. An extrusion apparatus for producing large-diameter PE water supply pipes according to claim 9, characterized in that, The diameter of the inner support rod (18) gradually increases from the point near the limiting plate (13) to the point far away.

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