A polyethylene winding structure wall pipe forming device

Abstract

The present invention relates to the technical field of wound structure wall tube processing, and proposes a polyethylene wound structure wall tube forming device, comprising a first sleeve having an internal space; a second sleeve arranged in the internal space, the axis of the second sleeve being colinear with the axis of the first sleeve, the second sleeve having a passing space, the passing space being used for the corrugated tube to pass through, a first annular cavity being provided between the outer wall of the second sleeve and the inner wall of the first sleeve, the first annular cavity being used for liquid polyethylene to pass through; a rotating plate being arranged to rotate relative to the first annular cavity, the rotating plate having a first inlet, the first inlet being used for injecting liquid polyethylene into the first annular cavity; a die being arranged at one end of the first annular cavity away from the rotating plate, the die being used for liquid polyethylene extrusion molding. Through the above technical scheme, the problem of uneven thickness of extruded polyethylene in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of winding structure wall tube processing, and in particular to a polyethylene winding structure wall tube forming device. Background Art

[0002] Polyethylene wound structural wall pipe is a kind of pipe with excellent performance and is widely used in many fields. This kind of pipe uses polyethylene as the main raw material. Polyethylene has the advantages of corrosion resistance, wear resistance, low temperature resistance and impact resistance. This enables polyethylene wound structural wall pipe to be used stably and for a long time in various harsh environmental conditions. The structural wall of the pipe is formed by winding, which enhances the ring stiffness and strength of the pipe. This unique structural design makes the pipe perform well when subjected to external pressure and soil load, and is not easy to deform and rupture. In order to enhance the load-bearing capacity of polyethylene, polyethylene is usually coated on the corrugated pipe.

[0003] In the prior art, polyethylene is usually coated on a corrugated pipe by extrusion. During the extrusion process, liquid polyethylene enters an annular cavity from one side and then coats the corrugated pipe at the extruder head. In actual production, due to the different pressures of liquid polyethylene on the polyethylene inlet side and the opposite side in the annular cavity, the polyethylene coated on the corrugated pipe has different thicknesses. Summary of the invention

[0004] The invention provides a polyethylene winding structure wall pipe forming device, which solves the problem of uneven thickness of extruded polyethylene in the related art.

[0005] The technical solution of the present invention is as follows:

[0006] A polyethylene winding structure wall pipe forming device, comprising:

[0007] a first sleeve having an inner space;

[0008] A second sleeve is arranged in the internal space, the axis of the second sleeve is colinear with the axis of the first sleeve, the second sleeve has a through space, the through space is used for the corrugated tube to pass through, and a first annular cavity is provided between the outer wall of the second sleeve and the inner wall of the first sleeve, the first annular cavity is used for liquid polyethylene to pass through;

[0009] A rotating plate is rotatably arranged relative to the first annular cavity, the rotating plate has a first inlet, and the first inlet is used to inject liquid polyethylene into the first annular cavity;

[0010] A die is arranged at one end of the first annular cavity away from the rotating plate, and the die is used for extrusion molding of the liquid polyethylene.

[0011] Optionally, it also includes:

[0012] A flange is arranged at an end of the second sleeve away from the die, and the flange is used to be connected to the first sleeve.

[0013] Optionally, it also includes:

[0014] A hydraulic motor is arranged in the first annular cavity, an output shaft sleeve of the hydraulic motor is arranged on the outer wall of the second sleeve, and the rotating plate is arranged on the output shaft of the hydraulic motor.

[0015] Optionally, the fluid inlet of the hydraulic motor is communicated with a polyethylene delivery pump, and the fluid outlet of the hydraulic motor is communicated with the first inlet.

[0016] Optionally, it also includes:

[0017] The third sleeve is arranged inside the first sleeve, the third sleeve is rotationally sealed with the output shaft of the hydraulic motor, and the third sleeve is rotationally sealed with the rotating plate. The third sleeve, the rotating plate and the output shaft of the hydraulic motor constitute a pre-compression space, and the liquid outlet of the hydraulic motor is connected to the first inlet through the pre-compression space.

[0018] Optionally, it also includes:

[0019] A one-way valve is arranged at the first inlet, and the one-way valve is used to prevent the liquid polyethylene in the first annular cavity from entering the pre-pressurization space.

[0020] Optionally, the one-way valve comprises:

[0021] There are two elastic valve sheets, both of which are arranged at the first inlet. The elastic valve sheets have elastic deformation force, and the elastic deformation force is used to provide a force for the two elastic valve sheets to approach each other. When the two elastic valve sheets approach or move away from each other, the first inlet is opened or closed.

[0022] Optionally, the elastic valve sheet has a fixed end and an abutting end, the fixed end is arranged on the rotating plate, the abutting end is used to abut against another elastic valve sheet and close the first inlet, and the fixed end is closer to the pre-compression space than the abutting end.

[0023] Optionally, the outer wall of the second sleeve gradually increases in diameter along the conveying direction of the corrugated tube.

[0024] Optionally, both the first sleeve and the second sleeve are connected to the flange by bolts.

[0025] The working principle and beneficial effects of the present invention are:

[0026] In the present invention, the first sleeve and the second sleeve are arranged concentrically, and the passage space of the second sleeve can allow the corrugated pipe to pass smoothly. Liquid polyethylene is injected into the first annular cavity through the first inlet on the rotating plate.

[0027] During the injection process, the rotating plate rotates relative to the first annular cavity, so that the liquid polyethylene can be more evenly distributed in the first annular cavity. The rotation speed of the rotating plate and the injection flow rate can be precisely controlled according to actual needs to ensure that the liquid polyethylene is more evenly distributed in the annular cavity.

[0028] After filling the first annular cavity, the liquid polyethylene flows to the die under pressure, and the die extrudes the liquid polyethylene so that it is evenly coated on the corrugated pipe passing through.

[0029] By setting the rotating plate, rotating feeding through the space is realized, so that the liquid polyethylene is more evenly distributed in the first annular cavity, thereby effectively avoiding the problem of uneven thickness of polyethylene caused by different pressures in the traditional method, and improving the quality and performance of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0031] Figure 1 It is a schematic diagram of the structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0033] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0034] Figure 4 It is a schematic diagram of the structure of the rotating plate and the one-way valve of the present invention.

[0035] In the figure: 100, first sleeve, 110, internal space, 200, second sleeve, 210, through space, 120, first annular cavity, 300, rotating plate, 310, first inlet, 400, die, 500, flange, 600, hydraulic motor, 700, third sleeve, 710, pre-pressing space, 800, one-way valve, 810, elastic valve plate, 811, fixed end, 812, abutting end. DETAILED DESCRIPTION

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0037] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0038] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0040] Reference Figure 1~Figure 4 The present invention proposes a polyethylene winding structure wall pipe forming device, including a first sleeve 100 with an internal space 110; a second sleeve 200 is arranged in the internal space 110, the axis of the second sleeve 200 is colinear with the axis of the first sleeve 100, the second sleeve 200 has a through space 210, the through space 210 is used for the corrugated pipe to pass through, and a first annular cavity 120 is provided between the outer wall of the second sleeve 200 and the inner wall of the first sleeve 100, and the first annular cavity 120 is used for liquid polyethylene to pass through; a rotating plate 300 is rotatably arranged relative to the first annular cavity 120, the rotating plate 300 has a first inlet 310, and the first inlet 310 is used to inject liquid polyethylene into the first annular cavity 120; a die 400 is arranged at one end of the first annular cavity 120 away from the rotating plate 300, and the die 400 is used for liquid polyethylene extrusion molding.

[0041] In this embodiment, the first sleeve 100 and the second sleeve 200 are arranged concentrically, and the passage space 210 of the second sleeve 200 allows the corrugated tube to pass smoothly. Liquid polyethylene is injected into the first annular cavity 120 through the first inlet 310 on the rotating plate 300 .

[0042] During the injection process, since the rotating plate 300 rotates relative to the first annular cavity 120, the liquid polyethylene can be more evenly distributed in the first annular cavity 120. The rotation speed of the rotating plate 300 and the injection flow rate can be precisely controlled according to actual needs to ensure that the liquid polyethylene is more evenly distributed in the annular cavity.

[0043] After the liquid polyethylene fills the first annular cavity 120, it flows to the die 400 under pressure. The die 400 extrude the liquid polyethylene so that it is evenly coated on the corrugated pipe passing through.

[0044] By setting the rotating plate 300, rotating feeding is achieved through the space 210, so that the liquid polyethylene is more evenly distributed in the first annular cavity 120, thereby effectively avoiding the problem of uneven thickness of polyethylene caused by different pressures in the traditional method, and improving the quality and performance of the pipe.

[0045] Furthermore, a flange 500 is provided at an end of the second sleeve 200 away from the die 400 , and the flange 500 is used to be connected to the first sleeve 100 .

[0046] In this embodiment, since there is a first annular cavity 120 between the first sleeve 100 and the second sleeve 200, the first sleeve 100 and the second sleeve 200 are not in direct contact. A section of the second sleeve 200 away from the die 400 is arranged by a flange 500, and then connected to the first sleeve 100 by the flange 500, so that the outer wall of the second sleeve 200 does not contact the inner wall of the first sleeve 100 and the purpose of reserving the first annular cavity 120 is achieved.

[0047] The flange 500 connection method makes the connection between the first sleeve 100 and the second sleeve 200 more firm and reliable, can withstand the pressure and vibration in the production process, reduce production failures caused by loose connections, and ensure stable production. The flange 500 can also effectively prevent liquid polyethylene from leaking at the connection between the first sleeve 100 and the second sleeve 200, avoid material waste and pollution to the production environment, ensure the stability of the injection amount of polyethylene in the production process, and help improve the consistency of product quality.

[0048] It should be further explained that a feed port is provided on the flange 500, and liquid polyethylene enters into the first annular cavity 120 between the rotating plate 300 and the flange 500 through the feed port, and then the polyethylene enters into the first annular cavity 120 between the die 400 and the rotating plate 300 through the first inlet 310 on the rotating disk. After the annular cavity is completely filled with liquid polyethylene, the polyethylene is extruded from the die 400 and coated on the corrugated tube.

[0049] Furthermore, the hydraulic motor 600 is disposed in the first annular cavity 120 , the output shaft of the hydraulic motor 600 is sleeved on the outer wall of the second sleeve 200 , and the rotating plate 300 is disposed on the output shaft of the hydraulic motor 600 .

[0050] In this embodiment, the hydraulic motor 600 can provide stable and accurate power output, ensuring that the rotation speed of the rotating plate 300 can be accurately controlled, thereby more effectively achieving uniform distribution of liquid polyethylene in the first annular cavity 120 .

[0051] The hydraulic motor 600 is arranged in the first annular cavity 120, which can prevent the hydraulic motor 600 from affecting the connection between the first flange 500 and the first sleeve 100 and the second sleeve 200. In addition, the output shaft sleeve of the hydraulic motor 600 is arranged on the second sleeve 200, which can avoid interference between the hydraulic motor 600 and the bellows passing through the space 210.

[0052] Furthermore, the liquid inlet of the hydraulic motor 600 is communicated with the polyethylene delivery pump, and the liquid outlet of the hydraulic motor 600 is communicated with the first inlet 310 .

[0053] In this embodiment, the liquid inlet of the hydraulic motor 600 is connected to the polyethylene delivery pump, and the pressure of the delivery pump is used to drive the hydraulic motor 600, thereby realizing the secondary utilization of energy, improving energy utilization efficiency, and reducing production energy consumption. The liquid outlet of the hydraulic motor 600 is connected to the first inlet 310, so that the output flow of the hydraulic motor 600 and the feed flow of the liquid polyethylene can match and cooperate with each other, ensuring the stability and uniformity of the feed.

[0054] This connection method reduces the need for additional power and fluid supply systems, simplifies the structure of the entire device, and reduces equipment costs and the complexity of installation and maintenance.

[0055] Using the liquid outlet of the hydraulic motor 600 to deliver liquid polyethylene to the first inlet 310 helps maintain the pressure balance in the system, reduces the impact of pressure fluctuations on the quality of pipe molding, and improves the consistency and reliability of the product.

[0056] Furthermore, it also includes a third sleeve 700 arranged inside the first sleeve 100, the third sleeve 700 and the output shaft of the hydraulic motor 600 are rotationally sealed, and the third sleeve 700 and the rotating plate 300 are rotationally sealed, the third sleeve 700, the rotating plate 300, and the output shaft of the hydraulic motor 600 form a pre-pressing space 710, and the liquid outlet of the hydraulic motor 600 is connected to the first inlet 310 through the pre-pressing space 710.

[0057] In this embodiment, the pre-pressing space 710 can pre-press the liquid polyethylene that is about to enter the first inlet 310, so that it has a more stable and uniform pressure when entering the first annular cavity 120, thereby improving the quality and precision of pipe forming.

[0058] Through the multiple rotating seal settings, the leakage of liquid polyethylene during the flow process is effectively prevented, the sealing and stability of the system are ensured, and material waste and environmental pollution are reduced.

[0059] Stable pressure and good sealing can reduce the wear of components such as the output shaft of the hydraulic motor 600 and the rotating plate 300, extend their service life, and reduce the maintenance cost of the equipment.

[0060] After the liquid polyethylene comes out of the liquid outlet of the hydraulic motor 600, it first enters the pre-pressing space 710. After the pre-pressing space 710 is filled, the liquid polyethylene in the pre-pressing space 710 gradually enters the first annular cavity 120 through the first inlet 310 on the rotating plate 300, and is extruded from the die 400. The liquid polyethylene passes through the pre-pressing space 710 and then enters the first annular cavity 120, which helps to better control the flow path and speed of the liquid polyethylene, making the feeding more stable and controllable, and further improving the working reliability of the device.

[0061] Furthermore, a one-way valve 800 is provided at the first inlet 310 , and the one-way valve 800 is used to prevent the liquid polyethylene in the first annular cavity from entering the pre-pressing space 710 .

[0062] In this embodiment, the one-way valve 800 can effectively prevent the liquid polyethylene in the first annular cavity from flowing back into the pre-pressing space 710, thereby ensuring that the pressure in the pre-pressing space 710 is stable and maintaining a good feeding order.

[0063] The one-way valve 800 at the first inlet 310 also prevents the backflow of liquid polyethylene from affecting the pressure of the pre-pressing space 710, thereby ensuring the stability of the pressure and flow rate of the liquid polyethylene entering the first annular cavity 120, which helps to improve the quality of pipe forming.

[0064] Furthermore, the one-way valve 800 includes two elastic valve sheets 810, both of which are arranged at the first inlet 310. The elastic valve sheets 810 have elastic deformation force, which is used to provide a force for the two elastic valve sheets 810 to approach each other. When the two elastic valve sheets 810 approach or move away from each other, the first inlet 310 is opened or closed.

[0065] In this embodiment, the two elastic valve sheets 810 are moved closer to each other under the action of elastic deformation force, which can provide a more reliable sealing effect and effectively prevent the backflow of liquid polyethylene. The elastic deformation of the elastic valve sheets 810 enables them to move closer to or away from each other quickly and flexibly according to the pressure change, thereby quickly opening or closing the first inlet 310, ensuring the timeliness and accuracy of feeding.

[0066] The two elastic valve sheets 810 have a force to move toward each other. When the liquid polyethylene in the pre-pressing space 710 enters the first annular cavity 120, the two elastic valve sheets 810 are pushed toward two ends away from each other. The liquid polyethylene in the pre-pressing space 710 needs to have a certain pressure to prevent the liquid polyethylene in the pre-pressing space 710 from entering the first annular cavity 120 through the first inlet 310 when the pre-pressing space 710 is not full. The stability of the flow rate and pressure of the liquid polyethylene entering the first annular cavity 120 is ensured.

[0067] The method of using the elastic valve sheet 810 to open or close the first inlet 310 has a lower failure rate and reduces the cost of equipment maintenance time.

[0068] Furthermore, the elastic valve plate 810 has a fixed end 811 and an abutting end 812 . The fixed end 811 is disposed on the rotating plate 300 . The abutting end 812 is used to abut against another elastic valve plate 810 and close the first inlet 310 . The fixed end 811 is closer to the pre-compression space 710 than the abutting end 812 .

[0069] In this embodiment, the fixed end 811 is disposed on the rotating plate 300, providing a stable installation foundation for the elastic valve disc 810, so that it is not easy to loosen or shift during operation, thereby ensuring the reliable operation of the one-way valve 800. The abutting end 812 is used to abut against another elastic valve disc 810 to close the first inlet 310. This design can achieve a more precise seal and effectively prevent the backflow of liquid polyethylene.

[0070] The fixed end 811 is closer to the pre-pressing space 710 than the abutting end 812 , which can improve the unidirectionality of the elastic valve plate 810 , so that the liquid polyethylene can only push open the elastic valve plate 810 from one side of the pre-pressing space 710 .

[0071] Furthermore, the outer wall of the second sleeve 200 gradually increases in diameter along the conveying direction of the corrugated tube.

[0072] In this embodiment, the outer wall of the second sleeve 200 gradually increases in diameter along the conveying direction of the corrugated tube, which can gradually reduce the volume of the first annular cavity 120, so that the pressure of the liquid polyethylene in the first annular cavity 120 gradually increases as it approaches the die 400, thereby making the thickness of the polyethylene extruded at the die 400 more uniform, which is beneficial to improving the quality and performance of the pipe.

[0073] The output shaft sleeve of the hydraulic motor 600 is arranged on the second sleeve 200, and the inner wall of the corresponding delivery part of the hydraulic motor 600 is also tapered. In this way, it is more conducive to the fixation of the hydraulic motor 600 and makes the hydraulic motor 600 more stable.

[0074] Furthermore, the first sleeve 100 and the second sleeve 200 are both bolted to the flange 500 .

[0075] In this embodiment, the first sleeve 100 and the second sleeve 200 are both bolted to the flange 500, which facilitates the disassembly of the device and makes it more convenient for relevant personnel to clean and maintain the hydraulic motor 600.

[0076] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A polyethylene winding structure wall pipe forming device, characterized in that: include: A first sleeve (100), the first sleeve (100) having an internal space (110); a second sleeve (200) disposed in the internal space (110); the axis of the second sleeve (200) is colinear with the axis of the first sleeve (100); the second sleeve (200) has a through space (210); the through space (210) is used for the corrugated tube to pass through; a first annular cavity (120) is provided between the outer wall of the second sleeve (200) and the inner wall of the first sleeve (100); the first annular cavity (120) is used for liquid polyethylene to pass through; a rotating plate (300) rotatably arranged relative to the first annular cavity (120), the rotating plate (300) having a first inlet (310), the first inlet (310) being used to inject liquid polyethylene into the first annular cavity (120); a die (400) disposed at one end of the first annular cavity (120) away from the rotating plate (300), the die (400) being used for extrusion molding of the liquid polyethylene; A hydraulic motor (600) is arranged in the first annular cavity (120), the output shaft sleeve of the hydraulic motor (600) is arranged on the outer wall of the second sleeve (200), the rotating plate (300) is arranged on the output shaft of the hydraulic motor (600), the liquid inlet of the hydraulic motor (600) is connected to the polyethylene delivery pump, and the liquid outlet of the hydraulic motor (600) is connected to the first inlet (310); A third sleeve (700) is arranged inside the first sleeve (100); the third sleeve (700) and the output shaft of the hydraulic motor (600) are rotationally sealed, and the third sleeve (700) and the rotating plate (300) are rotationally sealed; the third sleeve (700), the rotating plate (300), and the output shaft of the hydraulic motor (600) form a pre-pressing space (710); and the liquid outlet of the hydraulic motor (600) is connected to the first inlet (310) through the pre-pressing space (710).

2. A polyethylene winding structure wall pipe forming device according to claim 1, characterized in that: Also includes: A flange (500) is arranged at an end of the second sleeve (200) away from the die (400), and the flange (500) is used to be connected to the first sleeve (100).

3. A polyethylene winding structure wall pipe forming device according to claim 1, characterized in that: Also includes: A one-way valve (800) is provided at the first inlet (310), and the one-way valve (800) is used to prevent liquid polyethylene in the first annular cavity from entering the pre-pressurization space (710).

4. A polyethylene winding structure wall pipe forming device according to claim 3, characterized in that: The one-way valve (800) comprises: There are two elastic valve sheets (810), both of which are arranged at the first inlet (310). The elastic valve sheets (810) have an elastic deformation force, and the elastic deformation force is used to provide a force for the two elastic valve sheets (810) to move closer to each other. When the two elastic valve sheets (810) move closer to or farther from each other, the first inlet (310) is opened or closed.

5. A polyethylene winding structure wall pipe forming device according to claim 4, characterized in that: The elastic valve sheet (810) comprises a fixed end (811) and an abutting end (812); the fixed end (811) is arranged on the rotating plate (300); the abutting end (812) is used to abut against another elastic valve sheet (810) and close the first inlet (310); the fixed end (811) is closer to the pre-pressurization space (710) than the abutting end (812).

6. The polyethylene winding structure wall pipe forming device according to claim 1, characterized in that: The outer wall of the second sleeve (200) gradually increases in diameter along the conveying direction of the corrugated tube.

7. A polyethylene winding structure wall pipe forming device according to claim 2, characterized in that: The first sleeve (100) and the second sleeve (200) are both bolted to the flange (500).

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