PE pressing rollers

Abstract

This utility model relates to the field of thermal insulation pipe manufacturing technology, and discloses a PE pressing roller. The PE pressing roller in this application includes: a primary pressing roller assembly, a secondary pressing roller assembly, and a tertiary pressing roller assembly. This PE pressing roller, through multi-stage roller pressing, significantly improves the structural performance of the PE outer sheath. The continuous rolling pressure of the secondary and tertiary pressing roller assemblies eliminates air bubbles between PE sheet layers, ensuring gapless fusion between layers. The three-stage pressing process fully fuses the multiple PE sheets into a single structure, increasing tensile strength. The final pressing roller ensures a smooth outer sheath surface, avoiding problems such as edge warping and insufficient peel strength.

Description

Technical Field

[0001] This application relates to the field of thermal insulation pipe manufacturing technology, for example to a PE pressing roller. Background Technology

[0002] The descriptions in this section are provided only as background information relating to this disclosure and do not constitute prior art.

[0003] In the production process of prefabricated insulated pipes, the PE outer protective layer is formed by multiple layers of PE sheet wrapped around the outer surface of the polyurethane foam insulation layer. The maximum thickness of the PE sheet extrusion is 5 mm, and the normal production and use thickness is about 3.5 mm. Generally, the thickness of the outer protective layer is not less than 10 mm. The pipe is screwed into multiple layers of winding to form the required thickness of the PE outer protective layer.

[0004] The existing PE sheet lamination mechanism has the following problems:

[0005] 1. The existing pipe is not fully pressed by secondary and tertiary rollers when the PE outer protective layer is wrapped.

[0006] 2. Due to the lack of secondary and tertiary rollers to fully press the PE sheet, air bubbles are easily generated between the layers after winding, resulting in poor fusion between PE layers and affecting the tensile strength of PE.

[0007] 3. Due to insufficient compression, the existing production process cannot effectively form a monolithic structure for PE sheets, making them prone to delamination and failing to meet tensile strength requirements. Summary of the Invention

[0008] This application provides a PE pressing roller that significantly improves the structural performance of the PE outer sheath through multi-stage roller pressing. The continuous rolling of the secondary and tertiary pressing roller assemblies eliminates interlayer air bubbles in the PE sheet, ensuring gapless fusion between layers. The three-stage pressing process fully fuses the multiple PE sheets into a single structure, increasing tensile strength. The final pressing roller ensures a smooth outer sheath surface, avoiding problems such as edge curling and insufficient peel strength.

[0009] A PE pressing roller includes: a primary pressing roller assembly, a secondary pressing roller assembly, and a tertiary pressing roller assembly;

[0010] The primary pressing roller assembly includes: a first variable diameter pressing roller that is attached to the insulation pipe, which initially presses the PE sheet onto the surface of the insulation layer and / or the previously pressed PE sheet;

[0011] The secondary pressing roller assembly includes: a second variable diameter pressing roller that is attached to the insulation pipe, pressing the PE sheet initially pressed by the primary pressing roller assembly, and adjusting the pressing thickness, adhesion and peel strength of the PE sheet.

[0012] The three-stage pressing roller assembly includes a third pressing roller that is attached to the insulation pipe to press the PE sheet pressed by the second pressing roller assembly and / or the previously applied PE sheet, ensuring the smoothness of the PE sheet surface and the peel strength.

[0013] Multi-stage roller pressing significantly improves the structural performance of the PE outer sheath. Continuous rolling of the secondary and tertiary pressing roller assemblies eliminates air bubbles between PE sheet layers, ensuring seamless fusion between layers. The three-stage pressing process fully fuses the multiple PE sheets into a single structure, increasing tensile strength. The final pressing rollers ensure a smooth outer sheath surface, preventing edge curling and insufficient peel strength.

[0014] In some embodiments, the first variable diameter pressing roller and the second variable diameter pressing roller include a front section, a transition section, and a rear section, wherein the diameter of the front section is larger than that of the rear section.

[0015] In some embodiments, the first variable diameter pressing roller is a cooling roller, and the first variable diameter pressing roller is provided with a water inlet and a water outlet, with the water inlet connected to a cooling water source.

[0016] In some embodiments, the third pressing roller is a straight roller.

[0017] In some embodiments, the pre-insulated pipe PE winding and pressing mechanism further includes:

[0018] The main body of the mechanism is equipped with a primary pressing roller assembly, a secondary pressing roller assembly, and a tertiary pressing roller assembly.

[0019] In some embodiments, the primary pressing roller assembly includes:

[0020] The first telescopic mechanism is connected to the main body of the mechanism;

[0021] The first mounting frame is connected to the telescopic rod of the first telescopic mechanism, and the first variable diameter pressing roller is rotatably mounted on it;

[0022] The guide rod is fixedly connected at one end to either the first mounting bracket or the main body of the mechanism, and slidably engaged at the other end of the two.

[0023] In some embodiments, the secondary pressing roller assembly includes:

[0024] The second telescopic mechanism is connected to the main body of the mechanism;

[0025] The lower end of the first rotating rod is rotatably connected to the telescopic rod of the second telescopic mechanism, and the middle rod body is rotatably connected to the main body of the mechanism.

[0026] The second mounting bracket is connected to the upper end of the first rotating rod, and a second variable diameter pressing roller is rotatably mounted on it.

[0027] In some embodiments, the triple-pressing roller assembly includes:

[0028] The third telescopic mechanism is connected to the main body of the mechanism;

[0029] The lower end of the second rotating rod is rotatably connected to the telescopic rod of the third telescopic mechanism, and the middle rod body is rotatably connected to the main body of the mechanism.

[0030] The third mounting bracket is connected to the upper end of the second rotating rod, and the third pressing roller is rotatably mounted on it.

[0031] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0032] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0033] Figure 1 This is a schematic diagram of a three-dimensional structure of a PE pressing roller provided in an embodiment of this disclosure;

[0034] Figure 2 This is a schematic diagram of another PE pressing roller structure provided in this embodiment;

[0035] Figure 3 This is a front view structural diagram of a PE pressing roller provided in an embodiment of this disclosure;

[0036] Figure 4 This is a left-side view of the PE pressing roller provided in an embodiment of this disclosure.

[0037] Figure label:

[0038] 11. Insulation pipe; 12. Insulation layer; 13. PE outer protective pipe; 14. PE sheet; 15. Primary pressing roller assembly; 151. First variable diameter pressing roller; 1511. Front section; 1512. Transition section; 1513. Rear section; 1514. Inlet; 1515. Outlet; 152. First telescopic mechanism; 153. First mounting frame; 154. Guide rod; 16. Tertiary pressing roller assembly; 161. Third pressing roller; 162. Third telescopic mechanism; 163. Second rotating rod; 17. Secondary pressing roller assembly; 171. Second variable diameter pressing roller; 172. Second telescopic mechanism; 173. First rotating rod; 18. Main body of the mechanism; 19. Support leg. Detailed Implementation

[0039] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0040] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0041] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0042] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0043] Unless otherwise stated, the term "multiple" means two or more.

[0044] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0046] The insulation pipe 11 is generally composed of three layers: the inner layer is the working pipe, the middle layer is the polyurethane insulation layer 12, and the outer layer is the PE outer protective pipe 13. The PE outer protective pipe 13 is generally made by wrapping and applying layers of molten PE sheet 14.

[0047] Combination Figure 1-4 As shown, this embodiment of the present disclosure provides a PE pressing roller, including: a primary pressing roller assembly 15, a secondary pressing roller assembly 17, and a tertiary pressing roller assembly 16;

[0048] The primary pressing roller assembly 15 includes: a first variable diameter pressing roller 151 disposed against the insulation pipe 11, which initially presses the PE sheet 14 onto the surface of the insulation layer 12 and / or the previously pressed PE sheet 14.

[0049] The secondary pressing roller assembly 17 includes: a second variable diameter pressing roller 171 that is attached to the insulation pipe 11, pressing the PE sheet 14 initially pressed by the primary pressing roller assembly 15, and adjusting the pressing thickness, adhesion and peel strength of the PE sheet 14.

[0050] The three-stage pressing roller assembly 16 includes a third pressing roller 161 that is attached to the insulation pipe 11, pressing the PE sheet 14 pressed by the second pressing roller assembly 17 and / or the previously applied PE sheet 14, ensuring the smoothness and peel strength of the PE sheet 14 surface.

[0051] Multi-stage roller pressing significantly improves the structural performance of the PE outer sheath. Continuous rolling of the secondary and tertiary pressing roller assemblies 16 eliminates air bubbles between the PE sheet layers 14, ensuring seamless fusion between layers. The three-stage pressing process fully fuses the multiple PE sheets 14 into a single structure, increasing tensile strength. The final pressing rollers ensure a smooth outer sheath surface, preventing edge curling and insufficient peel strength.

[0052] In some embodiments, the first variable diameter pressing roller 151 and the second variable diameter pressing roller 171 include a front section 1511, a transition section 1512, and a rear section 1513, with the diameter of the front section 1511 being larger than that of the rear section 1513. The front section 1511 initially applies the PE sheet 14 onto the insulation layer 12, while the transition section 1512 and the rear section 1513 apply the PE sheet 14 onto the previously applied PE sheet 14. This is because the PE layer needs to reach a thickness of 10 mm, but the PE sheet 14 extruded from the PE die head is only 3-4 mm thick, so multiple layers need to be applied to achieve the target thickness.

[0053] In some embodiments, the first variable-diameter pressing roller 151 is a cooling roller. The first variable-diameter pressing roller 151 is provided with an inlet 1514 and an outlet 1515. The inlet 1514 is connected to a cooling water source, and the outlet 1515 is connected to a drainage ditch or a water storage device. The cooling roller can adjust the temperature of the outer surface of the PE sheet within the range of high elasticity and viscous flow (molten state), thus not affecting the adhesion of the inner surface and preventing the PE from sticking to the first variable-diameter pressing roller 151. The cooling roller is a product of existing technology in the art, such as the laminar flow cooling roller produced by Tairui Heavy Industry Co., Ltd.

[0054] In some embodiments, the third pressing roller 161 is a straight roller.

[0055] In some embodiments, the pre-insulated pipe 11PE winding and pressing mechanism further includes:

[0056] The main body 18 is equipped with a primary pressing roller assembly 15, a secondary pressing roller assembly 17, and a tertiary pressing roller assembly 16.

[0057] The main body 18 is a U-shaped structure with multiple vertical plates inside. The vertical plates are used to install the secondary pressing roller assembly 17 and the tertiary pressing roller assembly 16.

[0058] The lower part of the main body 18 of the mechanism is equipped with support legs 19, the height, number and shape of which can be selected according to actual needs.

[0059] In some embodiments, the primary pressing roller assembly 15 includes:

[0060] The first telescopic mechanism 152 is located inside the loop-shaped structure of the main body 18 and is connected to the upper plate of the loop-shaped structure.

[0061] The first mounting bracket 153 is connected to the telescopic rod of the first telescopic mechanism 152, and the first variable diameter pressing roller 151 is rotatably mounted on it.

[0062] The guide rod 154 is fixedly connected at one end to either the first mounting bracket 153 or the main body of the mechanism 18, and the other end is slidably engaged with the other one of the two.

[0063] In some embodiments, the secondary pressing roller assembly 17 includes:

[0064] The second telescopic mechanism 172 is located inside the loop-shaped structure of the main body 18 of the mechanism and is connected to the vertical plate of the loop-shaped structure.

[0065] The lower end of the first rotating rod 173 is rotatably connected to the telescopic rod of the second telescopic mechanism 172, and the middle rod body is rotatably connected to the main body 18 of the mechanism.

[0066] The second mounting bracket is connected to the upper end of the first rotating rod 173, and the second variable diameter pressing roller 171 is rotatably mounted on it.

[0067] In some embodiments, the triple-pressing roller assembly 16 includes:

[0068] The third telescopic mechanism 162 is located inside the loop-shaped structure of the main body 18 of the mechanism and is connected to the vertical plate of the loop-shaped structure.

[0069] The lower end of the second rotating rod 163 is rotatably connected to the telescopic rod of the third telescopic mechanism 162, and the middle rod body is rotatably connected to the main body 18 of the mechanism. The upper side of the main body 18 of the mechanism is provided with multiple rectangular through holes. The first rotating rod 173 and the second rotating rod 163 are located in the corresponding rectangular through holes. The first rotating rod 173 and the second rotating rod are equipped with rotating shafts, and the rotating shafts are rotatably connected to the rectangular through holes of the main body 18 of the mechanism.

[0070] The third mounting bracket is connected to the upper end of the second rotating rod 163, and the third pressing roller 161 is rotatably mounted on it.

[0071] All telescopic mechanisms can be hydraulic cylinders, pneumatic cylinders, or electric telescopic rods.

[0072] The first telescopic mechanism 152 is for longitudinal telescopic movement, while the third telescopic mechanism 162 and the second telescopic mechanism 172 are for lateral telescopic movement. The third telescopic mechanism 162 and the second telescopic mechanism 172 are fixedly installed on the vertical plate of the main body 18 of the mechanism.

[0073] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A PE pressing roller, characterized in that, include: The primary pressing roller assembly includes: a first variable diameter pressing roller that is attached to the insulation pipe, which initially presses the PE sheet onto the surface of the insulation layer and / or the previously pressed PE sheet; The secondary pressing roller assembly includes: a second variable diameter pressing roller that is attached to the insulation pipe, pressing the PE sheet initially pressed by the primary pressing roller assembly, and adjusting the pressing thickness, adhesion and peel strength of the PE sheet. The three-stage pressing roller assembly includes a third pressing roller that is attached to the insulation pipe to press the PE sheet pressed by the second pressing roller assembly and / or the previously applied PE sheet, ensuring the smoothness of the PE sheet surface and the peel strength.

2. The PE pressing roller according to claim 1, characterized in that, The first and second variable diameter pressing rollers each include a front section, a transition section, and a rear section, with the diameter of the front section being larger than that of the rear section.

3. The PE pressing roller according to claim 1, characterized in that, The first variable diameter pressing roller is a cooling roller. The first variable diameter pressing roller is provided with a water inlet and a water outlet. The water inlet is connected to a cooling water source.

4. The PE pressing roller according to claim 1, characterized in that, The third pressing roller is a straight roller.

5. The PE pressing roller according to claim 1, characterized in that, Also includes: The main body of the mechanism is equipped with a primary pressing roller assembly, a secondary pressing roller assembly, and a tertiary pressing roller assembly.

6. The PE pressing roller according to claim 5, characterized in that, The primary pressing roller assembly includes: The first telescopic mechanism is connected to the main body of the mechanism; The first mounting frame is connected to the telescopic rod of the first telescopic mechanism, and the first variable diameter pressing roller is rotatably mounted on it; The guide rod is fixedly connected at one end to either the first mounting bracket or the main body of the mechanism, and slidably engaged at the other end of the two.

7. The PE pressing roller according to claim 5, characterized in that, The secondary pressing roller assembly includes: The second telescopic mechanism is connected to the main body of the mechanism; The lower end of the first rotating rod is rotatably connected to the telescopic rod of the second telescopic mechanism, and the middle rod body is rotatably connected to the main body of the mechanism. The second mounting bracket is connected to the upper end of the first rotating rod, and a second variable diameter pressing roller is rotatably mounted on it.

8. The PE pressing roller according to claim 5, characterized in that, The three-stage pressing roller assembly includes: The third telescopic mechanism is connected to the main body of the mechanism; The lower end of the second rotating rod is rotatably connected to the telescopic rod of the third telescopic mechanism, and the middle rod body is rotatably connected to the main body of the mechanism. The third mounting bracket is connected to the upper end of the second rotating rod, and the third pressing roller is rotatably mounted on it.

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