Variable diameter sizing sleeve for plastic pipe production

Abstract

The application provides a variable-diameter sizing sleeve for plastic pipe production, and belongs to the technical field of pipe production. The variable-diameter sizing sleeve comprises a frame body, a sizing channel for pipe passing is arranged on the frame body, a plurality of first sizing pieces are fixedly arranged along the sizing channel in the frame body, and a first sizing hole is arranged on the first sizing piece. A plurality of second sizing pieces are movably arranged along the sizing channel in the frame body, at least three second sizing holes with different sizes are arranged on the second sizing piece, the diameters of the second sizing holes are all smaller than that of the first sizing hole, and the second sizing piece is connected with a driving assembly. In the use process of the variable-diameter sizing sleeve for plastic pipe production, the second sizing piece is driven to move by the driving assembly so that the corresponding second sizing hole is coaxial with the first sizing hole, and then the pipe extruded by the extruder can pass through the second sizing hole to be sized. Compared with the traditional sizing sleeve, the variable-diameter sizing sleeve can be used for producing various pipe models, and has the effects of multiple functions and convenient operation.

Description

Technical Field

[0001] This invention relates to the field of pipe manufacturing technology, and in particular to a variable diameter sizing sleeve for plastic pipe manufacturing. Background Technology

[0002] Plastic pipes are generally made from synthetic resins, with the addition of stabilizers, lubricants, and plasticizers. They are lightweight and corrosion-resistant, and are widely used in various fields. In the production process, the raw material for plastic pipes is fed into an extruder, where it is heated and compressed into a viscous molten state. This molten material is then formed into a tube through the extruder's die. The high-temperature pipe is then inserted into the inner cavity of a sizing sleeve for diameter shaping. Simultaneously, a cooling device is installed outside the sizing sleeve to cool and solidify the pipe during the dimensional adjustment process within the sleeve.

[0003] Patent CN206030495U discloses a PE pipe cooling sizing sleeve, comprising a sizing sleeve body, with upper and lower flanges fixed at both ends of the sizing sleeve body. An annular water storage container is provided on the end face of the upper flange, with inlet connectors distributed circumferentially within the water storage container. A hollow connecting rod connects the upper and lower flanges, with one end of the hollow connecting rod near the upper flange communicating with the water storage container. Several atomizing water outlets are provided on the outer wall of the hollow connecting rod near the sizing sleeve body. When the PE pipe enters the sizing sleeve body from the extruder, cooling water is injected into the hollow connecting rod from the water storage container. Subsequently, cooling water is sprayed out from the atomizing water outlets of the hollow connecting rod, thereby cooling and shaping the PE pipe entering the inner cavity of the sizing sleeve body. The outer diameter of the shaped PE pipe is the same as the inner diameter of the limiting hole of the sizing sleeve body.

[0004] However, the PE pipe cooling sizing sleeve in the aforementioned patent can only be used to produce pipes of one diameter. When it is necessary to switch to a different pipe diameter, the sizing sleeve needs to be disassembled and a sizing sleeve of the corresponding size needs to be installed before subsequent pipe production can begin. The replacement process is quite complicated. It suffers from the problems of limited functionality and inconvenient replacement. Summary of the Invention

[0005] In view of the above problems, the present invention provides a variable diameter sizing sleeve for the production of plastic pipes.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0007] A variable diameter sizing sleeve for producing plastic pipes is provided, comprising a frame, a sizing channel for pipes to pass through, a plurality of first sizing plates fixedly arranged at intervals along the axial direction of the sizing channel inside the frame, each first sizing plate having a first sizing hole, and a plurality of second sizing plates movably arranged at intervals along the axial direction of the sizing channel inside the frame, each second sizing plate having at least three second sizing holes, the diameter of each second sizing hole being smaller than that of the first sizing holes. The second sizing plates are connected to a driving assembly, which is used to drive the second sizing plates to move so that the second sizing hole corresponding to the desired pipe is coaxial with the first sizing hole.

[0008] Furthermore, the frame includes a first sizing ring and a second sizing ring arranged coaxially. At least two positioning posts are fixedly connected between the first sizing ring and the second sizing ring. A first sizing plate is located between the first sizing ring and the second sizing ring, and the positioning posts pass through and are fixed on the first sizing plate. The positioning posts are evenly arranged around the circumference of the first sizing hole. The inner circular holes of the first sizing ring and the second sizing ring coincide with the projection of the first sizing hole in the axial direction.

[0009] Furthermore, the second sizing plate includes two movable mounting plates, and the driving assembly includes a horizontal driving assembly and a vertical lifting assembly. The mounting plates are connected to the horizontal driving assembly, which drives the two mounting plates to open and close. The horizontal driving assembly is connected to the vertical lifting assembly, which drives the horizontal driving assembly to rise and fall so that the second sizing hole corresponding to the required pipe material is moved to a position coaxial with the first sizing hole.

[0010] Furthermore, the mounting plate has several limiting holes of a size that are adapted to the positioning post at the active contact position, and adjacent limiting holes are symmetrically arranged on both sides of the corresponding second sizing hole. When the driving assembly drives the two mounting plates to move and abut, the inner wall of the limiting hole contacts the outer wall of the positioning post.

[0011] Furthermore, a fixing rod is provided on the side of the mounting plate away from the positioning post, and several mounting plates on the same side are fixedly connected to the same fixing rod, which is connected to the horizontal drive assembly.

[0012] Furthermore, the horizontal drive assembly includes at least two cylinders, which are respectively located on both sides of the second sizing plate. The fixing rod is detachably connected to the piston rod of the cylinder on the same side, and the cylinders are connected to the vertical lifting assembly.

[0013] Furthermore, the vertical lifting assembly includes at least two telescopic rods, which are respectively arranged on both sides of the second sizing plate and correspond to the cylinder on the same side. The telescopic rod consists of an outer telescopic rod and an inner telescopic rod that are coaxially sleeved. The top of the inner telescopic rod is fixedly connected to the cylinder. A limiting component for restricting the axial sliding of the inner telescopic rod is provided between the outer telescopic rod and the inner telescopic rod. A mounting plate is fixedly connected to the end of the outer telescopic rod away from the cylinder. A fixing bracket for fixing the first positioning ring and the second positioning ring is provided on the mounting plate.

[0014] Furthermore, the limiting component includes a positioning pin. The side wall of the outer telescopic rod is provided with several through holes of the same size as the positioning pin, spaced from top to bottom. The side wall of the inner telescopic rod is provided with several grooves of the same size as the through holes. The positioning pin is inserted into the through hole and engaged with the grooves of different heights to align the different second sizing holes on the mounting plate with the first sizing hole.

[0015] Furthermore, a positioning hole is provided through the end of the fixing rod, and the first sizing ring and the second sizing ring are also provided with strip holes with the same width as the diameter of the positioning hole. The positioning hole coincides with the strip hole when the mounting plate is closed. Positioning rods for fixing the mounting plate are inserted into both the positioning hole and the strip hole.

[0016] Furthermore, a guide tube is coaxially arranged on the side of the first sizing ring away from the second sizing ring. The inner diameter of the guide tube is the same as that of the first sizing hole, and a chamfer is provided at the end of the guide tube away from the first sizing ring along the circumference of the hole.

[0017] This application provides a variable diameter sizing sleeve for plastic pipe production, including a frame with a sizing channel for pipe passage. Multiple first sizing plates are fixedly arranged at intervals along the axial direction of the sizing channel within the frame. Each first sizing plate has a first sizing hole. Multiple second sizing plates are also movably arranged at intervals along the axial direction of the sizing channel within the frame. Each second sizing plate has at least three second sizing holes, and the diameter of each second sizing hole is smaller than that of the first sizing holes. A driving assembly is connected to each second sizing plate to move it so that the second sizing hole corresponding to the desired pipe material is coaxial with the first sizing hole.

[0018] The beneficial effects of this invention are as follows: multiple second sizing plates are movably arranged along the sizing channel inside the frame. Each second sizing plate has at least three second sizing holes of different sizes, and the diameter of each second sizing hole is smaller than that of the first sizing hole. The second sizing plates are connected to a driving assembly. The driving assembly drives the second sizing plates to move so that the corresponding second sizing hole is coaxial with the first sizing hole. This allows the pipe extruded by the extruder to pass through the second sizing hole for pipe diameter shaping. This design allows the sizing sleeve of this invention to quickly switch the second sizing hole to accommodate the production of different types of pipes, and it has the effects of multiple functions and convenient operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a variable diameter sizing sleeve for producing plastic pipes according to the present invention.

[0020] Figure 2 This is a schematic diagram of the assembly of the first and second sizing plates of a variable diameter sizing sleeve for the production of plastic pipes according to the present invention.

[0021] Figure 3 for Figure 2 A magnified view of part A in the diagram.

[0022] Figure 4 This is a schematic diagram of the second sizing plate of a variable diameter sizing sleeve for producing plastic pipes according to the present invention.

[0023] The components include: 1. Frame; 11. First sizing ring; 12. Second sizing ring; 13. Strip hole; 2. First sizing plate; 21. First sizing hole; 3. Second sizing plate; 31. Second sizing hole; 32. Mounting plate; 33. Limiting hole; 4. Positioning post; 5. Drive assembly; 51. Horizontal drive assembly; 511. Cylinder; 52. Vertical lifting assembly; 521. Outer telescopic rod; 522. Inner telescopic rod; 523. Through hole; 524. Groove; 525. Positioning pin; 6. Fixing rod; 61. Positioning hole; 62. Positioning rod; 7. Mounting plate; 8. Fixing bracket; 9. Conduit. Detailed Implementation

[0024] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0025] This invention discloses a variable diameter sizing sleeve for plastic pipe production, with reference to... Figure 1 , Figure 2 and Figure 3The system includes a frame 1, which has a sizing channel for pipes to pass through. Multiple first sizing plates 2 are fixedly arranged at intervals along the sizing channel inside the frame 1. Each first sizing plate 2 has a first sizing hole 21. The pipe extruded by the extruder passes through the first sizing hole 21 for diameter shaping. After being cooled and solidified by an external refrigeration mechanism, the outer diameter of the formed pipe is the same as the diameter of the first sizing hole 21. Multiple second sizing plates 3 are also movably arranged at intervals along the sizing channel inside the frame 1. Each second sizing plate 3 has at least three second sizing holes 31 of different sizes, and the diameter of each second sizing hole 31 is smaller than that of the first sizing holes 21. The second sizing plate 3 is connected to the drive assembly 5. When it is necessary to switch to producing a smaller diameter pipe during the production process, the drive assembly 5 drives the second sizing plate 3 to move so that the corresponding second sizing hole 31 is coaxial with the first sizing hole 21. This allows the pipe extruded by the extruder to pass through the second sizing hole 31 for pipe diameter shaping. After being cooled and shaped by the refrigeration mechanism, a shaped pipe with the same outer diameter as the diameter of the second sizing hole 31 is obtained.

[0026] Specifically, the frame 1 includes a first sizing ring 11 and a second sizing ring 12 coaxially arranged, with at least two positioning posts 4 inserted and fixed between the first sizing ring 11 and the second sizing ring 12. A first sizing plate 2 is located between the first sizing ring 11 and the second sizing ring 12, and the positioning posts 4 pass through and are welded to the first sizing plate 2. Simultaneously, the positioning posts 4 are evenly arranged circumferentially along the first sizing hole 21 to improve the stability of the first sizing plate 2 with the first sizing ring 11 and the second sizing ring 12. The inner circular holes of the first sizing ring 11 and the second sizing ring 12 coincide with the axial projection of the first sizing hole 21, so that the first sizing hole 21 together with the inner circular holes of the first sizing ring 11 and the second sizing ring 12 constitute a sizing channel.

[0027] The second sizing plate 3 includes two movable mounting plates 32. The drive assembly 5 includes a horizontal drive assembly 51 and a vertical lifting assembly 52. ​​The mounting plates 32 are connected to the horizontal drive assembly 51, and the horizontal drive assembly 51 is connected to the vertical lifting assembly 52. ​​When switching production pipes, the vertical lifting assembly 52 drives the horizontal drive assembly 51 to rise and fall, so that the corresponding arc-shaped hole on the mounting plate 32 moves to the same height position as the first sizing hole 21. Then, the horizontal drive assembly 51 drives the two mounting plates 32 to abut and close, forming a complete second sizing hole 31, and making the second sizing hole 31 coaxial with the first sizing hole 21.

[0028] The mounting plate 32 has several limiting holes 33 at intervals at the active contact positions, the size of which is adapted to the positioning post 4. At the same time, limiting holes 33 are symmetrically provided on both sides of each second sizing hole 31. When the driving assembly 5 drives the two mounting plates 32 to move and abut, the inner wall of the limiting hole 33 contacts the outer wall of the positioning post 4 to improve the stability between the second sizing plate 3 and the positioning post 4.

[0029] A fixing rod 6 is provided on the side of the mounting plate 32 away from the positioning post 4, and several mounting plates 32 on the same side are bolted to the same fixing rod 6. The fixing rod 6 is connected to the horizontal drive assembly 51, and the horizontal drive assembly 51 drives the fixing rod 6 to move, which can simultaneously control the opening and closing of several mounting plates 32.

[0030] The horizontal drive assembly 51 includes at least two cylinders 511, which are positioned on the side of the fixed rod 6 away from the mounting plate 32. The fixed rod 6 is bolted to the piston rod of the cylinder 511, and the cylinder 511 is connected to the vertical lifting assembly 52. ​​By driving the cylinder 511 to reciprocate vertically via the vertical lifting assembly 52, the height of the second sizing hole 31 can be adjusted in real time. When the mounting plate 32 on the fixed rod 6 is damaged, it can be replaced or repaired promptly by removing the bolts between the fixed rod 6 and the piston rod of the cylinder 511.

[0031] The vertical lifting assembly 52 includes at least two telescopic rods, each corresponding to a cylinder 511. Each telescopic rod consists of an outer telescopic rod 521 and an inner telescopic rod 522 coaxially sleeved together. The top of the inner telescopic rod 522 is bolted to the cylinder 511. A limiting assembly is installed between the outer and inner telescopic rods 521. After the telescopic rods complete the height adjustment of the second sizing plate 3, the limiting assembly restricts the axial sliding of the inner telescopic rod 522. A mounting plate 7 is bolted to the end of the outer telescopic rod 521 away from the cylinder 511. A fixing bracket 8 for bolting the first positioning ring and the second positioning ring is integrally fixed on the mounting plate 7 to further improve the overall stability of the device.

[0032] Specifically, the limiting component includes a positioning pin 525. The side wall of the outer telescopic rod 521 has several through holes 523 of the same size that are adapted to the positioning pin 525, spaced from top to bottom. The side wall of the inner telescopic rod 522 also has several grooves 524 of the same size at the corresponding positions of the through holes 523. By inserting the positioning pin 525 through the through holes 523 and the corresponding grooves 524, the raising and lowering of the inner telescopic rod can be controlled.

[0033] Reference Figure 4 The end of the fixing rod 6 has a positioning hole 61. The first sizing ring 11 and the second sizing ring 12 also have strip holes 13 with the same width as the diameter of the positioning hole 61. The positioning hole 61 coincides with the strip hole 13 when the mounting plate 32 is closed. When the cylinder 511 drives the mounting plates 32 on both sides to close, the positioning rod 62 is inserted into both the positioning hole 61 and the strip hole 13 to further improve the stability of the mounting plate 32.

[0034] A guide tube 9 is coaxially bolted to the side of the first sizing ring 11 away from the second sizing ring 12. The inner diameter of the guide tube 9 is the same as that of the first sizing hole 21. The end of the guide tube 9 away from the first sizing ring 11 is chamfered along the circumference of the hole so that the workers can introduce the pipe extruded by the extruder into the guide tube 9, making the process of the pipe entering the sizing channel smoother.

[0035] The implementation principle of a variable diameter sizing sleeve for plastic pipe production according to an embodiment of this application is as follows: During the use of a variable diameter sizing sleeve for plastic pipe production, multiple first sizing plates 2 are fixedly arranged at intervals along the axial direction of the sizing channel inside the frame 1. Each first sizing plate 2 has a first sizing hole 21. Multiple second sizing plates 3 are also movably arranged at intervals along the axial direction of the sizing channel inside the frame 1. Each second sizing plate 3 has at least three second sizing holes 31 of different sizes, and the diameter of each second sizing hole 31 is smaller than that of the first sizing hole 21. A driving assembly 5 is connected to the second sizing plate 3. During pipe production, the first sizing hole 21 and the different sizes of the second sizing holes 31 correspond to different pipe diameters of formed pipes. By driving the second sizing plate 3 with the driving assembly 5, the corresponding second sizing hole 31 can be made coaxial with the first sizing hole 21. After the pipe extruded by the extruder passes through the corresponding first sizing hole 21 or second sizing hole 31, it is cooled and shaped by a refrigeration mechanism to obtain a formed pipe of the corresponding pipe diameter. Compared with traditional sizing sleeves, the variable diameter sizing sleeve for plastic pipe production of the present invention can be used to produce a variety of different pipe models, and has the advantages of multiple functions and convenient operation.

[0036] Those skilled in the art will understand that although preferred embodiments of the invention have been described, those skilled in the art, once they understand the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention. Clearly, those skilled in the art can make various alterations and modifications to the invention without departing from its spirit and scope. Thus, if these modifications and modifications of the invention fall within the scope of the claims of the invention and their equivalents, the invention also intends to include these modifications and modifications.

Claims

1. A variable diameter sizing sleeve for producing plastic pipes, characterized in that: The device includes a frame (1) with a sizing channel for pipes to pass through. Multiple first sizing plates (2) are fixedly arranged at intervals along the axial direction of the sizing channel inside the frame (1). Each first sizing plate (2) has a first sizing hole (21). Multiple second sizing plates (3) are also movably arranged at intervals along the axial direction of the sizing channel inside the frame (1). Each second sizing plate (3) has at least three second sizing holes (31), and the diameter of each second sizing hole (31) is smaller than that of the first sizing hole (21). A driving assembly (5) is connected to each second sizing plate (3), which drives the second sizing plate (3) to move so that the required pipe material corresponds to it. The second sizing hole (31) is coaxial with the first sizing hole (21). The second sizing plate (3) includes two movable mounting plates (32). The drive assembly (5) includes a horizontal drive assembly (51) and a vertical lifting assembly (52). The mounting plates (32) are connected to the horizontal drive assembly (51). The horizontal drive assembly (51) drives the two mounting plates (32) to open and close. The horizontal drive assembly (51) is connected to the vertical lifting assembly (52). The vertical lifting assembly (52) drives the horizontal drive assembly (51) to rise and fall so that the second sizing hole (31) corresponding to the required pipe material is moved to a position coaxial with the first sizing hole (21).

2. The variable diameter sizing sleeve for plastic pipe production according to claim 1, characterized in that: The frame (1) includes a first sizing ring (11) and a second sizing ring (12) arranged coaxially. At least two positioning posts (4) are fixedly connected between the first sizing ring (11) and the second sizing ring (12). The first sizing plate (2) is located between the first sizing ring (11) and the second sizing ring (12). The positioning posts (4) pass through and are fixed on the first sizing plate (2). The positioning posts (4) are evenly arranged around the first sizing hole (21). The inner circular holes of the first sizing ring (11) and the second sizing ring (12) coincide with the projection of the first sizing hole (21) in the axial direction.

3. The variable diameter sizing sleeve for plastic pipe production according to claim 2, characterized in that: The mounting plate (32) is provided with a plurality of limiting holes (33) at intervals at the active contact positions, the size of which is adapted to the positioning post (4), and adjacent limiting holes (33) are symmetrically arranged on both sides of the corresponding second sizing hole (31). When the driving assembly (5) drives the two mounting plates (32) to move and abut, the inner wall of the limiting hole (33) contacts the outer wall of the positioning post (4).

4. A variable diameter sizing sleeve for plastic pipe production according to claim 2, characterized in that: The mounting plate (32) is provided with a fixing rod (6) on the side away from the positioning post (4). Several mounting plates (32) on the same side are fixedly connected to the same fixing rod (6). The fixing rod (6) is connected to the horizontal drive assembly (51).

5. A variable diameter sizing sleeve for plastic pipe production according to claim 4, characterized in that: The horizontal drive assembly (51) includes at least two cylinders (511), which are respectively located on both sides of the second sizing plate (3). The fixing rod (6) is detachably connected to the piston rod of the cylinder (511) on the same side. The cylinder (511) is connected to the vertical lifting assembly (52).

6. A variable diameter sizing sleeve for plastic pipe production according to claim 5, characterized in that: The vertical lifting assembly (52) includes at least two telescopic rods. The two telescopic rods are respectively arranged on both sides of the second sizing plate (3) and correspond to the cylinder (511) on the same side. The telescopic rod is composed of an outer telescopic rod (521) and an inner telescopic rod (522) coaxially sleeved. The top of the inner telescopic rod (522) is fixedly connected to the cylinder (511). A limiting assembly for restricting the axial sliding of the inner telescopic rod (522) is provided between the outer telescopic rod (521) and the inner telescopic rod (522). An installation plate (7) is fixedly connected to the end of the outer telescopic rod (521) away from the cylinder (511). A fixing bracket (8) for fixing the first positioning ring and the second positioning ring is provided on the installation plate (7).

7. A variable diameter sizing sleeve for plastic pipe production according to claim 6, characterized in that: The limiting component includes a positioning pin (525). The side wall of the outer telescopic rod (521) is provided with several through holes (523) of the same size as the positioning pin (525) from top to bottom. The side wall of the inner telescopic rod (522) is provided with several grooves (524) of the same size as the through holes (523). The positioning pin (525) passes through the through hole (523) and is inserted into the grooves (524) of different heights to make the different second sizing holes (31) on the mounting plate (32) aligned with the first sizing hole (21).

8. A variable diameter sizing sleeve for plastic pipe production according to claim 4, characterized in that: The end of the fixing rod (6) is provided with a positioning hole (61). The first sizing ring (11) and the second sizing ring (12) are also provided with a strip hole (13) with the same width as the diameter of the positioning hole (61). The positioning hole (61) coincides with the strip hole (13) when the mounting piece (32) is closed. The positioning hole (61) and the strip hole (13) are simultaneously provided with positioning rods (62) for fixing the mounting piece (32).

9. A variable diameter sizing sleeve for plastic pipe production according to claim 2, characterized in that: A guide tube (9) is coaxially arranged on the side of the first sizing ring (11) away from the second sizing ring (12). The inner diameter of the guide tube (9) is the same as that of the first sizing hole (21). A chamfer is provided at the end of the guide tube (9) away from the first sizing ring (11) along the circumference of the hole.

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