Rigid polyurethane heat insulation pipeline with external impact resistant reinforcing structure

Abstract

The invention provides a rigid polyurethane heat insulation pipeline with an external impact resistant reinforcing structure, and relates to the technical field of heat insulation pipelines, the rigid polyurethane heat insulation pipeline comprises a first pipeline and a third pipeline; the outer side of the first pipeline is sleeved with a second pipeline, and the outer side of the second pipeline is sleeved with a first outer pipe; the outer side of the third pipeline is sleeved with a fourth pipeline, and the outer side of the fourth pipeline is sleeved with a second outer pipe; first protrusions are formed on the outer wall of the first pipeline at a time in a linear array shape, the first protrusions are of an annular structure, and the first protrusions welded in the linear array shape jointly form an anti-extrusion structure of the first pipeline. In the aspects of external impact resistance and structural strength optimization, the first annular protrusions in a linear array on the outer wall of the first pipeline are fused with the pipeline body through a one-time forming process to form a rigid supporting ring belt, just like dense reinforcing ribs are arranged on the inner side of the pipeline, external impact force is effectively dispersed, deformation of the pipe wall due to pressure is restrained, and the service life of the pipeline is prolonged. And the anti-extrusion capability of the first pipeline is obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of adiabatic pipelines, and particularly to a rigid polyurethane adiabatic pipeline with an anti-external impact strengthening structure. Background Art

[0002] The rigid polyurethane adiabatic pipeline is a composite pipeline system with polyurethane foam as the core heat-insulating material, combined with a multi-layer structure design, having efficient heat insulation, structural strengthening and reliable connection performance, and is widely used in fields such as heating, refrigeration, and chemical industry that require fluid transportation and temperature stability maintenance.

[0003] Although the existing pipelines are provided with protrusions for strengthening, the protrusions cannot be staggered and compensated, affecting the overall strengthening effect; the existing pipelines are not convenient to disassemble and assemble with a wrench during disassembly and assembly, and the disassembly and assembly structure cannot achieve auxiliary sealing. Summary of the Invention

[0004] The present invention relates to a rigid polyurethane adiabatic pipeline with an anti-external impact strengthening structure, which solves the problems that although the existing pipelines are provided with protrusions for strengthening, the protrusions cannot be staggered and compensated, affecting the overall strengthening effect; the existing pipelines are not convenient to disassemble and assemble with a wrench during disassembly and assembly, and the disassembly and assembly structure cannot achieve auxiliary sealing.

[0005] The present invention provides a rigid polyurethane adiabatic pipeline with an anti-external impact strengthening structure, specifically including: a first pipeline and a third pipeline; a second pipeline is sleeved outside the first pipeline, and a first outer pipe is sleeved outside the second pipeline; a fourth pipeline is sleeved outside the third pipeline, and a second outer pipe is sleeved outside the fourth pipeline; first protrusions are integrally formed on the outer wall of the first pipeline in a linear array, the first protrusions are annular structures, and the linearly arrayed and welded first protrusions together form the anti-extrusion structure of the first pipeline.

[0006] Further, a first spiral spring is arranged inside the second pipeline, and the first spiral spring is a strength enhancing member of the second pipeline.

[0007] Further, second protrusions are integrally formed on the outer wall of the second pipeline in an annular array, the second protrusions are semi-cylindrical structures, and the annularly arrayed second protrusions together form the anti-bending strengthening structure of the second pipeline.

[0008] Further, third protrusions are integrally formed on the outer wall of the first outer pipe in an annular array, the third protrusions are semi-cylindrical structures, and the annularly arrayed third protrusions together form the bending strengthening structure of the first outer pipe.

[0009] Further, the second protrusions and the third protrusions are in a staggered state.

[0010] Further, fourth protrusions are integrally formed on the outer wall of the third pipe in a linear array. The fourth protrusions are of an annular structure, and the fourth protrusions integrally formed in the linear array together constitute the anti-extrusion structure of the third pipe.

[0011] Further, a second helical spring is arranged inside the fourth pipe, and the second helical spring is a strength enhancing member of the fourth pipe.

[0012] Further, sixth protrusions are integrally formed on the outer wall of the second outer pipe in an annular array. The sixth protrusions are of a semi-cylindrical structure, and the sixth protrusions integrally formed in the annular array together constitute the strengthening structure of the second outer pipe.

[0013] Further, fifth protrusions are integrally formed on the outer wall of the fourth pipe in an annular array. The fifth protrusions are of a semi-cylindrical structure, and the fifth protrusions integrally formed in the annular array together constitute the strengthening structure of the fourth pipe.

[0014] Further, the fifth protrusions and the sixth protrusions are arranged in a staggered manner.

[0015] Further, the right ends of the first pipe, the second pipe, and the first outer pipe are all welded to the connecting seat. The left ends of the third pipe, the fourth pipe, and the second outer pipe are all welded to the connecting block. A sealing gasket is adhered to the left end face of the connecting block. The sealing gasket is made of rubber. The connecting block is threadedly connected to the connecting seat, and the left end face of the sealing gasket is in elastic contact with the left end face of the inner wall of the connecting seat.

[0016] Further, the connecting seat is of a cover-like structure, and the right end of the connecting seat is polished. After being polished, the right end of the connecting seat is of an arc-shaped structure.

[0017] Further, an auxiliary block is welded to the outside of the second outer pipe. The auxiliary block is of a hexagonal structure. A sealing groove is formed in the left end face of the auxiliary block. The sealing groove is of an annular groove structure. The arc-shaped part on the right side of the connecting seat is in close contact with the sealing groove.

[0018] Further, a connecting pipe is welded to the inner wall of the first pipe. The connecting pipe is of a cylindrical tubular structure. The connecting pipe is inserted into the inside of the third pipe. The outer wall of the third pipe is in contact with the inner wall of the third pipe. An auxiliary groove is formed in each of the left end and the right end face of the connecting pipe. Both auxiliary grooves are of a tapered groove structure, and the two auxiliary grooves are arranged in a mirror image.

[0019] The present invention provides a rigid polyurethane insulating pipe with an anti-external impact strengthening structure, and has the following beneficial effects: In terms of external impact resistance and structural strength optimization, the present application provides: the annular first protrusions of the linear array on the outer wall of the first pipe are integrated with the pipe body through a one-time molding process to form a rigid support ring belt, which is like setting dense reinforcement ribs on the inner side of the pipe, effectively dispersing external impact force, inhibiting deformation of the pipe wall due to pressure, and significantly improving the first pipe's anti-extrusion ability; The first coil spring embedded in the second pipe serves as a flexible reinforcement. Its coil structure can absorb energy through elastic deformation when impacted, just like providing a "buffer spring layer" for the pipe, and forms a rigid-flexible anti-bending system with the semi-cylindrical second protrusions of the annular array on the outer wall of the second pipe; The second protrusion increases the local wall thickness and cross-sectional inertia moment to improve the pipe's ability to resist bending deformation and reduce the risk of breakage, while the spiral spring assists in resisting deformation through elastic reset force. The two work together to keep the second pipe structurally stable when subjected to lateral loads. The third protrusion on the outer wall of the first outer pipe and the second protrusion of the second pipe are staggered. This spatial dislocation design breaks the single-direction stress transfer path; When the pipeline is subjected to a bending load, the staggered raised structures can form stress support points at different levels, just like building a three-dimensional grid-like anti-bending skeleton on the outside of the pipeline, forcing the stress to change direction multiple times during the transmission process and be dispersed and consumed, thereby greatly improving the overall anti-bending performance.

[0020] In terms of connection sealing and assembly convenience, the present application has the following advantages: the threaded connection structure between the connection seat and the connection block realizes quick disassembly and assembly. The rubber sealing pad at the left end of the connection block elastically contacts the inner wall of the connection seat when the thread is tightened, forming the first sealing barrier. The elastic deformation ability of the rubber can fill the tiny gaps at the connection interface and prevent fluid leakage; The arc-shaped polished treatment on the right side of the connecting seat cooperates with the sealing groove of the auxiliary block to play a guiding role during assembly, avoiding connection difficulties caused by rigid collision. At the same time, the close fit between the arc surface and the sealing groove forms a second sealing line of defense, further improving the sealing reliability.

[0021] The hexagonal structure of the auxiliary block provides a stable force point for the wrench, just like setting up a "mechanical wrench interface" for pipe connections, which significantly improves the efficiency of disassembly and assembly, and is especially suitable for installation scenarios with limited space.

[0022] In terms of fluid transmission efficiency and pipeline functionality, in the present application: The insertion structure of the connecting pipe on the inner wall of the first pipeline and the third pipeline has been double-optimized through interference fit and tapered auxiliary grooves; the cylindrical tubular structure of the connecting pipe ensures the coaxiality of the fluid channel, reducing the flow resistance caused by misalignment during connection. The tapered auxiliary grooves at both ends are like "flow guiding bell mouths" for fluids, guiding the liquid to smoothly transition, reducing turbulence and pressure drop, and improving the conveying efficiency. This design not only ensures the sealing of the pipeline connection but also reduces energy loss through fluid mechanics optimization, and is applicable to scenarios with high requirements for fluid transmission stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0024] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0025] In the drawings: Figure 1 The axonometric structural schematic diagram of the rigid polyurethane insulating pipeline with an anti-external shock strengthening structure of the present invention is shown; Figure 2 The front view structural schematic diagram of the rigid polyurethane insulating pipeline with an anti-external shock strengthening structure of the present invention is shown; Figure 3 The axonometric structural schematic diagram of the rigid polyurethane insulating pipeline with an anti-external shock strengthening structure of the present invention after being partially cut open is shown; Figure 4 The present invention is shown Figure 3 The axonometric structural schematic diagram after rotation is shown; Figure 5 The axonometric structural schematic diagram of the rigid polyurethane insulating pipeline with an anti-external shock strengthening structure of the present invention after being partially cut off is shown; Figure 6 The present invention is shown Figure 4 The axonometric exploded structural schematic diagram is shown; Figure 7 The present invention is shown Figure 5 The axonometric structural schematic diagram after rotation is shown; Figure 8 The present invention is shown Figure 7 The enlarged structural schematic diagram at position A of the present invention is shown.

[0026] LIST OF REFERENCE NUMERALS 1. First pipeline; 101. First protrusion; 2. Second pipeline; 201. First helical spring; 202. Second protrusion; 3. First outer tube; 301. Third protrusion; 4. Connecting seat; 5. Connecting pipe; 501. Auxiliary groove; 6. Third pipeline; 601. Fourth protrusion; 7. Fourth pipeline; 701. Second helical spring; 702. Fifth protrusion; 8. Second outer tube; 801. Sixth protrusion; 9. Connecting block; 901. Sealing gasket; 10. Auxiliary block; 1001. Sealing groove. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. It should also be understood that terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless explicitly defined in the embodiments of the present invention.

[0029] The "first", "second" and similar terms used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Terms such as "a", "one" or "the" do not indicate a quantity limitation, but indicate the existence of at least one. Similarly, terms such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. In the following description, spatial and orientation terms such as "upper", "lower", "front", "rear", "top", "bottom", "vertical" and "horizontal" may be used to describe the embodiments of the present invention, but it should be understood that these terms are only for the convenience of describing the embodiments shown in the drawings, and do not require the actual device to be constructed or operated in a specific orientation. In the following description, the use of terms such as "connected", "coupled", "fixed" and "attached" may mean that two elements or structures are directly connected without other elements or structures therebetween, or may mean that two elements or structures are indirectly connected through intermediate elements or structures, unless otherwise clearly stated in this article.

[0030] Embodiment 1: Please refer to Figures 1 to 8 : The present invention provides a rigid polyurethane heat-insulating pipe with an anti-external impact strengthening structure, comprising: a first pipe 1 and a third pipe 6; a second pipe 2 is sleeved outside the first pipe 1, and a first outer pipe 3 is sleeved outside the second pipe 2; a fourth pipe 7 is sleeved outside the third pipe 6, and a second outer pipe 8 is sleeved outside the fourth pipe 7; first protrusions 101 are integrally formed on the outer wall of the first pipe 1 in a linear array. The first protrusions 101 are of annular structure. The linearly arrayed and welded first protrusions 101 together form the anti-extrusion structure of the first pipe 1. During use, the strength of the first pipe 1 and its resistance to external impact can be improved through the first protrusions 101.

[0031] Wherein, a first helical spring 201 is arranged inside the second pipe 2. The first helical spring 201 is a strength enhancing member of the second pipe 2. During use, the anti-extrusion and anti-impact capabilities of the second pipe 2 can be improved through the first helical spring 201.

[0032] Wherein, second protrusions 202 are integrally formed on the outer wall of the second pipe 2 in an annular array. The second protrusions 202 are of semi-cylindrical structure. The annularly arrayed second protrusions 202 together form the anti-bending strengthening structure of the second pipe 2. During use, the anti-bending ability of the second pipe 2 can be improved through the second protrusions 202, thereby reducing the probability of the second pipe 2 breaking.

[0033] Wherein, third protrusions 301 are integrally formed on the outer wall of the first outer pipe 3 in an annular array. The third protrusions 301 are of semi-cylindrical structure. The annularly arrayed third protrusions 301 together form the bending strengthening structure of the first outer pipe 3. During use, the anti-bending ability of the first outer pipe 3 can be improved through the third protrusions 301, thereby reducing the probability of the first outer pipe 3 breaking.

[0034] Wherein, the second protrusions 202 and the third protrusions 301 are staggered. During use, through the staggered arrangement of the second protrusions 202 and the third protrusions 301, the overall anti-bending ability can be improved.

[0035] Wherein, fourth protrusions 601 are integrally formed on the outer wall of the third pipe 6 in a linear array. The fourth protrusions 601 are of annular structure. The fourth protrusions 601 integrally formed in a linear array together form the anti-extrusion structure of the third pipe 6. During use, the anti-extrusion ability of the third pipe 6 can be improved through the linearly arrayed and welded fourth protrusions 601.

[0036] Wherein, a second helical spring 701 is arranged inside the fourth pipe 7. The second helical spring 701 is a strength enhancing member of the fourth pipe 7. During use, the anti-extrusion and anti-impact capabilities of the second pipe 2 can be improved through the second helical spring 701.

[0037] Among them, on the outer wall of the second outer tube 8, a sixth protrusion 801 is integrally formed in an annular array. The sixth protrusion 801 is a semi-cylindrical structure. The annular-array-formed sixth protrusions 801 together constitute the reinforcement structure of the second outer tube 8. During use, the bending resistance of the first outer tube 3 can be improved through the sixth protrusion 801, thereby reducing the probability of the second outer tube 8 breaking.

[0038] Among them, on the outer wall of the fourth pipe 7, a fifth protrusion 702 is integrally formed in an annular array. The fifth protrusion 702 is a semi-cylindrical structure. The annular-array-formed fifth protrusions 702 together constitute the reinforcement structure of the fourth pipe 7. During use, the bending resistance of the fourth pipe 7 can be improved through the fifth protrusion 702, thereby reducing the probability of the fourth pipe 7 breaking.

[0039] Among them, the fifth protrusion 702 and the sixth protrusion 801 are arranged in a staggered manner. During use, the overall bending resistance can be improved through the staggered arrangement of the fifth protrusion 702 and the sixth protrusion 801.

[0040] Among them, the right ends of the first pipe 1, the second pipe 2, and the first outer tube 3 are all welded to the connecting seat 4. The left ends of the third pipe 6, the fourth pipe 7, and the second outer tube 8 are all welded to the connecting block 9. A sealing gasket 901 is adhered to the left end face of the connecting block 9. The sealing gasket 901 is made of rubber. The connecting block 9 is threadedly connected to the connecting seat 4. The left end face of the sealing gasket 901 is in elastic contact with the left end face of the inner wall of the connecting seat 4. During connection, through the threaded connection between the connecting block 9 and the connecting seat 4, the connection is quick and convenient, and after connection, sealing is performed through the sealing gasket 901, and the sealing effect is good.

[0041] Among them, the connecting seat 4 has a cover-like structure. The right end of the connecting seat 4 is polished. After polishing, the right end of the connecting seat 4 is an arc-shaped structure. When the connecting block 9 is threadedly connected to the connecting seat 4, the connection is more quick and convenient under the guidance of the arc-shaped part on the connecting seat 4.

[0042] Among them, an auxiliary block 10 is welded to the outside of the second outer tube 8. The auxiliary block 10 is a hexagonal structure. A sealing groove 1001 is opened on the left end face of the auxiliary block 10. The sealing groove 1001 is an annular groove structure. The arc-shaped part on the right side of the connecting seat 4 is in close contact with the sealing groove 1001. When the connecting seat 4 and the connecting block 9 are screwed tightly, a wrench is clamped on the auxiliary block 10 and rotated. At this time, the disassembly and assembly efficiency of the connecting seat 4 and the connecting block 9 can be improved, and through the close contact between the arc-shaped part on the right side of the connecting seat 4 and the sealing groove 1001, the sealing performance after the connection between the connecting block 9 and the connecting seat 4 can be improved.

[0043] Embodiment 2, on the basis of Embodiment 1, as Figures 1 - 8As shown in the figure, a connecting pipe 5 is welded on the inner wall of the first pipe 1. The connecting pipe 5 is a cylindrical tubular structure. The connecting pipe 5 is inserted into the inside of the third pipe 6. The outer wall of the third pipe 6 contacts the inner wall of the third pipe 6. An auxiliary groove 501 is provided at both the left end and the right end face of the connecting pipe 5. Both auxiliary grooves 501 are in the shape of a tapered groove. The two auxiliary grooves 501 are arranged in a mirror image. During use, through the insertion of the connecting pipe 5 into the third pipe 6, the sealing performance of the connection between the first pipe 1 and the third pipe 6 can be improved, and through the arrangement of the two tapered groove-shaped auxiliary grooves 501, the smoothness of the liquid flow in the first pipe 1 and the third pipe 6 can be improved.

[0044] The working principle of this embodiment: When the first pipe 1 and the third pipe 6 are connected, first insert the connecting pipe 5 into the third pipe 6, and then thread the connecting block 9 onto the connecting seat 4. When tightening, use a wrench to clamp on the auxiliary block 10 and rotate the wrench to tighten; after tightening, the sealing gasket 901 elastically contacts the left end face of the inner wall of the connecting seat 4, and the right side of the connecting seat 4 is in close contact with the sealing groove 1001.

Claims

1. A rigid polyurethane heat-insulating pipe with an anti-external impact strengthening structure, characterized in that, Including: A first pipe (1) and a third pipe (6); a second pipe (2) is sleeved outside the first pipe (1), and a first outer pipe (3) is sleeved outside the second pipe (2); a fourth pipe (7) is sleeved outside the third pipe (6), and a second outer pipe (8) is sleeved outside the fourth pipe (7); first protrusions (101) are integrally formed on the outer wall of the first pipe (1) in a linear array. The first protrusions (101) are annular structures, and the linearly arrayed and welded first protrusions (101) together form the anti-extrusion structure of the first pipe (1); a first helical spring (201) is arranged inside the second pipe (2), and the first helical spring (201) is a strength enhancing member of the second pipe (2); second protrusions (202) are integrally formed on the outer wall of the second pipe (2) in an annular array. The second protrusions (202) are semi-cylindrical structures, and the annularly arrayed formed second protrusions (202) together form the anti-bending strengthening structure of the second pipe (2); third protrusions (301) are integrally formed on the outer wall of the first outer pipe (3) in an annular array. The third protrusions (301) are semi-cylindrical structures, and the annularly arrayed formed third protrusions (301) together form the bending strengthening structure of the first outer pipe (3); the second protrusions (202) and the third protrusions (301) are staggered.

2. The rigid polyurethane insulating pipe with an anti-external impact strengthening structure according to claim 1, characterized in that, Fourth protrusions (601) are integrally formed on the outer wall of the third pipe (6) in a linear array. The fourth protrusions (601) are annular structures, and the linearly arrayed and integrally formed fourth protrusions (601) together form the anti-extrusion structure of the third pipe (6).

3. The rigid polyurethane insulating pipe with an anti-external impact strengthening structure according to claim 2, characterized in that, A second helical spring (701) is arranged inside the fourth pipe (7), and the second helical spring (701) is a strength enhancing member of the fourth pipe (7).

4. The rigid polyurethane insulating pipe with an anti-external impact strengthening structure according to claim 3, characterized in that Sixth protrusions (801) are integrally formed on the outer wall of the second outer pipe (8) in an annular array. The sixth protrusions (801) are semi-cylindrical structures, and the annularly arrayed formed sixth protrusions (801) together form the strengthening structure of the second outer pipe (8).

5. The rigid polyurethane adiabatic pipeline with an anti-external impact strengthening structure according to claim 4, wherein, Fifth protrusions (702) are integrally formed on the outer wall of the fourth pipe (7) in an annular array. The fifth protrusions (702) are semi-cylindrical structures, and the annularly arrayed formed fifth protrusions (702) together form the strengthening structure of the fourth pipe (7).

6. The rigid polyurethane insulating pipe with an anti-external impact strengthening structure according to claim 5, characterized in that, The fifth protrusions (702) and the sixth protrusions (801) are arranged in a staggered manner.

7. The rigid polyurethane adiabatic pipeline with an anti-external impact strengthening structure according to claim 6, characterized in that, The right ends of the first pipe (1), the second pipe (2) and the first outer pipe (3) are all welded to a connecting seat (4), and the left ends of the third pipe (6), the fourth pipe (7) and the second outer pipe (8) are all welded to a connecting block (9). A sealing gasket (901) is adhered to the left end face of the connecting block (9). The sealing gasket (901) is made of rubber. The connecting block (9) is threadedly connected to the connecting seat (4), and the left end face of the sealing gasket (901) is in elastic contact with the left end face of the inner wall of the connecting seat (4).

8. A rigid polyurethane insulating pipe with an anti-external impact strengthening structure according to claim 7, characterized in that, The connecting seat (4) has a cover-like structure, and the right end of the connecting seat (4) is polished. After polishing, the right end of the connecting seat (4) is an arc structure.

9. A rigid polyurethane adiabatic pipe with an anti-external impact strengthening structure according to claim 8, characterized in that, An auxiliary block (10) is welded to the outside of the second outer pipe (8). The auxiliary block (10) is of a hexagonal structure. A sealing groove (1001) is formed in the left end face of the auxiliary block (10). The sealing groove (1001) is of an annular groove structure. The arc-shaped part on the right side of the connecting seat (4) is in close contact with the sealing groove (1001).

10. A rigid polyurethane adiabatic pipeline with an anti-external impact strengthening structure according to claim 9, characterized in that, A connecting pipe (5) is welded to the inner wall of the first pipe (1). The connecting pipe (5) is of a cylindrical tubular structure. The connecting pipe (5) is inserted into the inside of the third pipe (6). The outer wall of the third pipe (6) is in contact with the inner wall of the third pipe (6). An auxiliary groove (501) is formed in each of the left end and the right end face of the connecting pipe (5). The two auxiliary grooves (501) are both of a tapered groove structure. The two auxiliary grooves (501) are arranged in a mirror image.

Images