PE winding and pressing mechanism for prefabricated thermal insulation pipe

Abstract

The utility model relates to the technical field of thermal insulation pipe manufacturing, and discloses a PE winding and pressing mechanism for a prefabricated thermal insulation pipe. The prefabricated thermal insulation pipe PE winding and pressing mechanism is used for applying and pressing a PE sheet discharged from a PE machine head to the surface of a thermal insulation layer of a thermal insulation pipe and comprises a first cooling roller assembly, a second cooling roller assembly, a secondary pressing roller assembly and a third pressing roller assembly. The structural performance of the PE outer protective layer is remarkably improved, through continuous rolling of the two-time pressing roller assembly and the third-time pressing roller assembly, bubbles between layers of PE sheets are eliminated, and it is guaranteed that fusion between the layers is gapless. The multiple layers of PE sheets are fully fused into an integrated structure in the three-time pressing process, and the tensile strength is improved. Finally, the surface of the outer protective layer is smooth through the pressing roller, and the problems of edge warping and insufficient peeling strength are avoided.

Description

Pre-insulated pipe PE winding and pressing mechanism Technical Field

[0001] This application relates to the field of thermal insulation pipe manufacturing technology, for example to a pre-insulated pipe PE winding and pressing mechanism. 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 spray-coated spiral insulation pipe, the PE outer protective layer is formed by multiple layers of PE sheet wound 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 spirally wound into multiple layers 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 winding and pressing mechanism for prefabricated insulated pipes. Through multi-stage roller pressing and cooling control, the structural performance of the PE outer sheath is significantly improved. Continuous rolling 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 rollers ensure a smooth outer sheath surface, avoiding edge curling and insufficient peel strength.

[0009] A prefabricated insulation pipe PE winding and pressing mechanism is used to press PE sheets from the PE die head onto the surface of the insulation layer of the insulation pipe, comprising: a first cooling roller assembly, a second cooling roller assembly, a second pressing roller assembly, and a third pressing roller assembly;

[0010] The first cooling roller assembly is located between the PE die head and the insulation pipe, receiving the PE sheet coming out of the PE die head and adjusting the state of the PE sheet.

[0011] The second cooling roller assembly is set close to the insulation pipe, receives the PE sheet from the first cooling roller assembly, further adjusts the state of the PE sheet and initially presses the PE sheet onto the insulation layer and / or the previously pressed PE sheet surface.

[0012] The secondary pressing roller assembly is set close to the insulation pipe to press the PE sheet initially pressed by the second cooling roller assembly, and to adjust the pressing thickness, adhesion and peel strength of the PE sheet;

[0013] The three-stage pressing roller assembly is set close to the insulation pipe to press the PE sheet that has been pressed by the two-stage pressing roller assembly, ensuring the smoothness of the PE sheet surface and the peel strength.

[0014] Through multi-stage roller pressing and cooling control, the structural performance of the PE outer sheath is significantly improved. Continuous rolling of the secondary and tertiary pressing roller assemblies eliminates interlayer air bubbles in the PE sheet, ensuring seamless fusion between layers. The three-stage pressing process fully fuses the multiple PE sheets into a unified structure, increasing tensile strength. The final pressing rollers ensure a smooth outer sheath surface, preventing edge curling and insufficient peel strength.

[0015] In some embodiments, the contact point between the second cooling roller assembly and the insulation pipe is located in the third quadrant region, the contact point between the secondary pressing roller assembly and the insulation pipe is located in the fourth quadrant region, and the contact point between the tertiary pressing roller assembly and the insulation pipe is located in the first quadrant region.

[0016] In some embodiments, the pre-insulated pipe PE winding and pressing mechanism further includes:

[0017] The main body of the mechanism is equipped with a first cooling roller assembly, a second cooling roller assembly, a secondary pressing roller assembly, and a tertiary pressing roller assembly.

[0018] In some embodiments, a fixed base is installed on the lower part of the main body of the mechanism.

[0019] In some embodiments, the first cooling roller assembly includes:

[0020] A fixed support frame, the lower part of which is connected to the main body of the mechanism;

[0021] The first telescopic mechanism is connected to the fixed bracket;

[0022] The first mounting bracket is connected to the telescopic rod of the first telescopic mechanism;

[0023] The first guide rod has one end fixedly connected to either the first mounting bracket or the fixed support, and the other end slidingly engaged with the other one of the two.

[0024] The first cooling roller is rotatably mounted on the first mounting frame, spaced apart from the PE machine and the insulation pipe. It is equipped with a cooling water inlet and an outlet, with the cooling water inlet connected to a cooling water source.

[0025] In some embodiments, the second cooling roller assembly includes:

[0026] The second telescopic mechanism is connected to the main body of the mechanism;

[0027] The second mounting bracket is connected to the telescopic rod of the second telescopic mechanism;

[0028] The second guide rod has one end fixedly connected to either the second mounting bracket or the main body of the mechanism, and the other end slidingly engaged with the other of the two.

[0029] The second cooling roller is rotatably mounted on the second mounting frame and is set against the insulation pipe. The contact point with the insulation pipe is located in the third quadrant area. It is equipped with a cooling water inlet and an outlet, and the cooling water inlet is connected to the cooling water source.

[0030] In some embodiments, the secondary pressing roller assembly includes:

[0031] The third telescopic mechanism is connected to the main body of the mechanism;

[0032] The lower end of the first 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.

[0033] The third mounting bracket is connected to the upper end of the first rotating rod;

[0034] The first pressing roller is rotatably mounted on the third mounting bracket, and is set against the insulation pipe, with the contact point with the insulation pipe located in the fourth quadrant region.

[0035] In some embodiments, the triple-pressing roller assembly includes:

[0036] The fourth telescopic mechanism is connected to the main body of the mechanism;

[0037] The lower end of the second rotating rod is rotatably connected to the telescopic rod of the fourth telescopic mechanism, and the middle rod body is rotatably connected to the main body of the mechanism.

[0038] The fourth mounting bracket is connected to the upper end of the second rotating rod;

[0039] The second pressing roller is rotatably mounted on the fourth mounting bracket and is set against the insulation pipe, with the contact point between the roller and the insulation pipe located in the first quadrant region.

[0040] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0041] 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:

[0042] Figure 1 is a three-dimensional structural schematic diagram of a prefabricated insulation pipe PE winding and pressing mechanism provided in an embodiment of this disclosure;

[0043] Figure 2 is a three-dimensional structural schematic diagram of another prefabricated insulation pipe PE winding and pressing mechanism provided in an embodiment of this disclosure;

[0044] Figure 3 is a front view of the PE winding and pressing mechanism for prefabricated insulated pipes provided in an embodiment of this disclosure.

[0045] Figure 4 is a left-side schematic diagram of the PE winding and pressing mechanism for prefabricated insulation pipes provided in an embodiment of this disclosure;

[0046] Figure 5 is a right-side schematic diagram of the PE winding and pressing mechanism for prefabricated insulation pipes provided in an embodiment of this disclosure;

[0047] Figure 6 is a schematic diagram of the first cooling roller assembly provided in an embodiment of this disclosure;

[0048] Figure 7 is a schematic diagram of the second cooling roller assembly provided in an embodiment of this disclosure;

[0049] Figure 8 is a schematic diagram of the secondary pressing roller assembly provided in an embodiment of this disclosure;

[0050] Figure 9 is a schematic diagram of the three-stage pressing roller assembly provided in an embodiment of this disclosure.

[0051] Figure label:

[0052] 11. PE machine head; 12. PE sheet; 13. Insulation pipe; 131. Insulation layer; 14. First cooling roller assembly; 141. Fixed bracket; 142. First guide rod; 143. First telescopic mechanism; 144. First mounting frame; 145. First cooling roller; 15. Second cooling roller assembly; 151. Second cooling roller; 16. Secondary pressing roller assembly; 161. Third telescopic mechanism; 162. First rotating rod; 163. First pressing roller; 164. Third mounting frame; 17. Tertiary pressing roller assembly; 171. Second pressing roller; 18. Main body of the mechanism; 19. Fixed base. Detailed Implementation

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] Unless otherwise stated, the term "multiple" means two or more.

[0058] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0059] 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.

[0060] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0061] As shown in Figures 1-9, this embodiment of the present disclosure provides a PE winding and pressing mechanism for prefabricated insulation pipes, used to press the PE sheet 12 from the PE die head 11 onto the surface of the insulation layer 131 of the insulation pipe 13, including: a first cooling roller assembly 14, a second cooling roller assembly 15, a secondary pressing roller assembly 16, and a tertiary pressing roller assembly 17.

[0062] The first cooling roller assembly 14 is located between the PE die head 11 and the insulation pipe 13, receiving the PE sheet 12 coming out of the PE die head 11 and adjusting the state of the PE sheet 12.

[0063] The second cooling roller assembly 15 is set against the insulation pipe 13, receives the PE sheet 12 from the first cooling roller assembly 14, further adjusts the state of the PE sheet 12 and initially presses the PE sheet 12 onto the insulation layer 131 and / or the previously pressed PE sheet 12 surface.

[0064] The secondary pressing roller assembly 16 is set against the heat insulation pipe 13 to press the PE sheet 12 initially pressed by the second cooling roller assembly 15, and adjust the pressing thickness, adhesion and peel strength of the PE sheet 12.

[0065] The three-stage pressing roller assembly 17 is set against the insulation pipe 13 to press the PE sheet 12 pressed by the two-stage pressing roller assembly 16 and / or the previously applied PE sheet 12, ensuring the smoothness of the PE sheet 12 surface and the peel strength.

[0066] Through multi-stage roller pressing and cooling control, the structural performance of the PE outer sheath is significantly improved. Continuous rolling of the secondary and tertiary pressing roller assemblies 17 eliminates air bubbles between the PE sheet layers 12, ensuring seamless fusion between layers. The tertiary pressing process fully fuses the multiple PE sheets 12 into a unified structure, increasing tensile strength. The final pressing rollers ensure a smooth outer sheath surface, preventing edge warping and insufficient peel strength.

[0067] In some embodiments, the contact point between the second cooling roller assembly 15 and the insulation pipe 13 is located in the third quadrant region, the contact point between the secondary pressing roller assembly 16 and the insulation pipe 13 is located in the fourth quadrant region, and the contact point between the tertiary pressing roller assembly 17 and the insulation pipe 13 is located in the first quadrant region. The center point dividing the quadrants is the projection point of the axis of the insulation pipe 13 onto the cross-section, that is, the center point / center of the circle.

[0068] In some embodiments, the pre-insulated pipe 13PE winding and pressing mechanism further includes:

[0069] The main body 18 of the mechanism is equipped with a first cooling roller assembly 14, a second cooling roller assembly 15, a secondary pressing roller assembly 16, and a tertiary pressing roller assembly 17. The main body 18 of the mechanism has a U-shaped structure and multiple vertical plates inside, which are used to fix the secondary pressing roller assembly 16 and the tertiary pressing roller assembly 17.

[0070] In some embodiments, a fixed base 19 is installed on the lower part of the main body 18 of the mechanism. The fixed base 19 is a support leg, and its height, number, and shape are selected according to actual needs.

[0071] In some embodiments, the first cooling roller assembly 14 includes:

[0072] The fixed bracket 141 is connected to the main body 18 of the mechanism at its lower part. The fixed bracket 141 includes a horizontal plate and a vertical plate. The horizontal plate is set above the main body 18 of the mechanism, and the lower part of the horizontal plate is connected to the upper side of the main body 18 of the mechanism through two vertical plates.

[0073] The first telescopic mechanism 143 is connected to the fixed bracket 141; the first telescopic mechanism 143 is fixed to the horizontal plate, and the orientation of the first telescopic mechanism 143 can be vertical or inclined.

[0074] The first mounting bracket 144 is connected to the telescopic rod of the first telescopic mechanism 143;

[0075] The first guide rod 142 has one end fixedly connected to either the first mounting bracket 144 or the fixed bracket 141, and the other end slidably engaged with the other one of the two; one or more first guide rods 142 may be provided.

[0076] The first cooling roller 145 is rotatably mounted on the first mounting frame 144. The first cooling roller 145 can be mounted through a bearing seat and is spaced apart from the PE machine and the insulation pipe 13. It is provided with a cooling water inlet and a water outlet, and the cooling water inlet is connected to the cooling water source.

[0077] In some embodiments, the second cooling roller assembly 15 includes:

[0078] The second telescopic mechanism is connected to the main body 18 of the mechanism;

[0079] The second mounting bracket is connected to the telescopic rod of the second telescopic mechanism;

[0080] The second guide rod has one end fixedly connected to either the second mounting bracket or the main body 18 of the mechanism, and the other end slidingly connected to the other one of the two.

[0081] The second cooling roller 151 is rotatably mounted on the second mounting frame and is set against the insulation pipe 13. The contact point with the insulation pipe 13 is located in the third quadrant region. It is provided with a cooling water inlet and an outlet, and the cooling water inlet is connected to the cooling water source.

[0082] In some embodiments, the secondary pressing roller assembly 16 includes:

[0083] The third telescopic mechanism 161 is connected to the main body 18 of the mechanism;

[0084] The lower end of the first rotating rod 162 is rotatably connected to the telescopic rod of the third telescopic mechanism 161, and the middle rod body is rotatably connected to the main body 18 of the mechanism.

[0085] The third mounting bracket 164 is connected to the upper end of the first rotating rod 162;

[0086] The first pressing roller 163 is rotatably mounted on the third mounting bracket 164 and is set against the insulation pipe 13. The contact point with the insulation pipe 13 is located in the fourth quadrant region.

[0087] In some embodiments, the triple-pressing roller assembly 17 includes:

[0088] The fourth telescopic mechanism is connected to the main body 18 of the mechanism;

[0089] The lower end of the second rotating rod is rotatably connected to the telescopic rod of the fourth telescopic mechanism, 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, which are respectively rotatably engaged with the first rotating rod 162 and the second rotating rod. The first rotating rod 162 and the second rotating rod are equipped with rotating shafts, which are rotatably connected to the main body 18 of the mechanism.

[0090] The fourth mounting bracket is connected to the upper end of the second rotating rod;

[0091] The second pressing roller 171 is rotatably mounted on the fourth mounting bracket and is set against the insulation pipe 13. The contact point between the roller and the insulation pipe 13 is located in the first quadrant region.

[0092] All telescopic mechanisms can be hydraulic cylinders, pneumatic cylinders, or electric telescopic rods.

[0093] The first and second telescopic mechanisms are longitudinal telescopic, while the third and fourth telescopic mechanisms are lateral telescopic.

[0094] 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 winding and pressing mechanism for prefabricated insulated pipes, used to press PE sheets from a PE die head onto the surface of the insulation layer of the insulated pipe, characterized in that, include: The first cooling roller assembly is located between the PE die head and the insulation pipe, receiving the PE sheet coming out of the PE die head and adjusting the state of the PE sheet. The second cooling roller assembly, located close to the insulation pipe, receives the PE sheet from the first cooling roller assembly, further adjusts the state of the PE sheet, and initially presses the PE sheet onto the insulation layer and / or the previously pressed PE sheet surface. The second pressing roller assembly, located close to the insulation pipe, presses the PE sheet initially pressed by the second cooling roller assembly, adjusting the pressing thickness, adhesion, and peel strength of the PE sheet. The third pressing roller assembly, located close to the insulation pipe, presses the PE sheet pressed by the second pressing roller assembly and / or the previously pressed PE sheet, ensuring the smoothness of the PE sheet surface and peel strength.

2. The PE winding and pressing mechanism for prefabricated insulated pipes according to claim 1, characterized in that, The contact point between the second cooling roller assembly and the insulation pipe is located in the third quadrant region, the contact point between the secondary pressing roller assembly and the insulation pipe is located in the fourth quadrant region, and the contact point between the tertiary pressing roller assembly and the insulation pipe is located in the first quadrant region.

3. The PE winding and pressing mechanism for prefabricated insulated pipes according to claim 1, characterized in that, Also includes: The main body of the mechanism is equipped with a first cooling roller assembly, a second cooling roller assembly, a secondary pressing roller assembly, and a tertiary pressing roller assembly.

4. The PE winding and pressing mechanism for prefabricated insulated pipes according to claim 3, characterized in that, A fixed base is installed on the lower part of the main body of the mechanism.

5. The PE winding and pressing mechanism for prefabricated insulated pipes according to claim 3, characterized in that, The first cooling roller assembly includes: a fixed bracket, the lower part of which is connected to the main body of the mechanism; a first telescopic mechanism, which is connected to the fixed bracket; a first mounting frame, which is connected to the telescopic rod of the first telescopic mechanism; a first guide rod, one end of which is fixedly connected to either the first mounting frame or the fixed bracket, and the other end of which is slidably engaged with the other one; and a first cooling roller, which is rotatably mounted on the first mounting frame, spaced apart from the PE machine and the insulation pipe, and is provided with a cooling water inlet and an outlet, the cooling water inlet being connected to a cooling water source.

6. The PE winding and pressing mechanism for prefabricated insulated pipes according to claim 3, characterized in that, The second cooling roller assembly includes: a second telescopic mechanism connected to the main body of the mechanism; a second mounting frame connected to the telescopic rod of the second telescopic mechanism; a second guide rod, one end of which is fixedly connected to either the second mounting frame or the main body of the mechanism, and the other end of which is slidably engaged with the other of the two; and a second cooling roller rotatably mounted on the second mounting frame, set against the insulation pipe, with the contact point with the insulation pipe located in the third quadrant region, and having a cooling water inlet and an outlet on it, the cooling water inlet being connected to a cooling water source.

7. The PE winding and pressing mechanism for prefabricated insulated pipes according to claim 3, characterized in that, The secondary pressing roller assembly includes: a third telescopic mechanism connected to the main body of the mechanism; a first rotating rod whose lower end is rotatably connected to the telescopic rod of the third telescopic mechanism, and whose middle rod body is rotatably connected to the main body of the mechanism; a third mounting frame connected to the upper end of the first rotating rod; and a first pressing roller rotatably mounted on the third mounting frame, set against the insulation pipe, with the contact point with the insulation pipe located in the fourth quadrant region.

8. The PE winding and pressing mechanism for prefabricated insulated pipes according to claim 3, characterized in that, The three-stage pressing roller assembly includes: a fourth telescopic mechanism connected to the main body of the mechanism; a second rotating rod, the lower end of which is rotatably connected to the telescopic rod of the fourth telescopic mechanism, and the middle rod body is rotatably connected to the main body of the mechanism; a fourth mounting frame connected to the upper end of the second rotating rod; and a second pressing roller rotatably mounted on the fourth mounting frame, set against the insulation pipe, with the contact point with the insulation pipe located in the first quadrant region.

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