Directly-buried plastic sleeve steel heat insulation pipeline

Abstract

The utility model belongs to the technical field of heat insulation pipelines, and particularly relates to a directly-buried plastic sleeve steel heat insulation pipeline. Comprising a plurality of inner pipes; a plurality of outer tubes; an insulating layer; the supporting ring assemblies are arranged between the two adjacent inner pipes; the joint assembly is arranged between the two adjacent outer pipes in a sleeving manner; wherein the supporting ring assembly comprises a first semi-ring part and a second semi-ring part, the second contact end of the first semi-ring part is connected to the second contact end of the second semi-ring part in a turnover mode by arranging a turnover part, and the first semi-ring part and the second semi-ring part are each provided with a plurality of hexagonal holes; the stability of the joint of the two adjacent inner pipes can be improved by arranging the supporting ring assemblies, the supporting ring assemblies can be opened and closed and are convenient to install, and the first semi-ring part and the second semi-ring part are each provided with a plurality of hexagonal holes, so that heat conduction is slowed down, the weight of the supporting ring assemblies is reduced, and the service life of the supporting ring assemblies is prolonged. The connector assembly can further improve the stability of connection between the pipelines, and meanwhile the sealing performance between the adjacent outer pipes can be guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal insulation pipelines, in particular to a directly buried plastic-sheathed steel thermal insulation pipeline. Background Art

[0002] Direct-buried plastic-jacketed steel insulated pipelines typically consist of a high-density polyethylene outer tube, a polyurethane foam insulation layer, and an inner steel pipe. Alternatively, the insulation layer may be a composite of aerogel insulation felt and high-pressure polyurethane foam. Direct-buried plastic-jacketed steel insulated pipelines are primarily used for underground transport of various media.

[0003] In the prior art, adjacent insulated pipes are connected by welding, resulting in unstable joints. During installation or after the pipes are buried, external factors can cause vibrations in the pipes, leading to fractures or cracks at the inner pipe joints, causing leakage of the medium within the pipes. Alternatively, fractures or cracks at the outer pipe joints can cause sewage in the soil to enter the insulation layer, compromising insulation effectiveness. Furthermore, corrosive substances in the sewage can shorten the service life of the inner pipes. Utility Model Content

[0004] The purpose of the utility model is to address the above-mentioned technical problems and provide a direct-buried plastic-sheathed steel insulated pipeline. By arranging a support ring assembly, the stability of the connection between two adjacent inner pipes can be improved and the risk of fracture at the connection between two adjacent inner pipes can be reduced. The support ring assembly can be opened and closed for easy installation. A number of hexagonal holes are provided on the first semi-ring portion and the second semi-ring portion, which help to slow down the conduction of heat and reduce the weight of the support ring assembly itself. The joint assembly can further improve the stability of the connection between the pipes and at the same time ensure the sealing between adjacent outer pipes.

[0005] In view of this, the utility model provides a direct-buried plastic-sheathed steel insulated pipeline, comprising:

[0006] A plurality of inner tubes, wherein two adjacent inner tubes are connected to each other;

[0007] A plurality of outer tubes, wherein the outer tubes are sleeved on the inner tubes;

[0008] The insulation layer is provided between the inner tube and the outer tube;

[0009] The support ring assembly is arranged between two adjacent inner tubes, and two ends of the support ring assembly respectively contact the ends of the two adjacent outer tubes;

[0010] The joint assembly is sleeved between two adjacent outer tubes, and the joint assembly is also sleeved on the support ring assembly;

[0011] Wherein, the support ring assembly includes a first semi-ring portion and a second semi-ring portion, and the first semi-ring portion and the second semi-ring portion both include a first contact end and a second contact end. The second contact end of the first semi-ring portion is connected to the second contact end of the second semi-ring portion by a folding portion, and the first semi-ring portion and the second semi-ring portion are both provided with a plurality of hexagonal holes.

[0012] In the above solution, further, an open groove is provided on the outer peripheral wall of the support ring assembly, and the open groove is located on the outer side of the folded portion.

[0013] In the above solution, further, an arcuate groove is provided on the second contact end of the first semi-ring portion and the second contact end of the second semi-ring portion, the two arcuate grooves are opposite to each other, and the arcuate grooves are located on the inner side of the folded portion.

[0014] In the above solution, further, a first limiting protrusion is provided on the outer circumferential wall of both ends of the inner tube, a first limiting ring groove is provided on the inner circumferential wall of the support ring assembly, and the first limiting protrusion is provided in the first limiting ring groove.

[0015] In the above solution, further, the inner peripheral wall of the joint assembly is provided with a second limiting protrusion ring, the outer peripheral wall of the support ring assembly is provided with a second limiting ring groove, and the second limiting protrusion ring is provided in the second limiting ring groove.

[0016] In the above scheme, further, a limiting groove is provided on the first contact end of the first semi-ring portion and the second contact end of the second semi-ring portion, and a limiting protrusion is provided on the second contact end of the first semi-ring portion and the first contact end of the second semi-ring portion, and the limiting protrusion is provided in the limiting groove.

[0017] The beneficial effects of the utility model are:

[0018] 1. The support ring assembly can improve the stability of the connection between two adjacent inner tubes and reduce the risk of fracture at the connection. The support ring assembly can be opened and closed for easy installation. The first and second half ring parts are each provided with a number of hexagonal holes, which help to slow down heat conduction and reduce the weight of the support ring assembly itself. The joint assembly can further improve the stability of the connection between the pipes while also ensuring the sealing between adjacent outer tubes.

[0019] 2. When the support ring assembly is in the unfolded state, the two sides of the opening groove interfere with each other, which can prevent the support ring assembly from unfolding at too large an angle, causing installation inconvenience and breakage of the folding part;

[0020] 3. The first limiting protrusion is arranged in the first limiting ring groove to limit the support ring assembly, thereby preventing axial movement and separation between the inner tubes and further improving the stability of the connection between the inner tubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0023] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0024] Figure 4 It is a schematic cross-sectional structure diagram of the utility model at another viewing angle;

[0025] Figure 5 This is a schematic structural diagram of the support ring assembly of the utility model when it is closed;

[0026] Figure 6 This is a schematic structural diagram of the support ring assembly of the utility model when it is unfolded;

[0027] Figure 7 This utility model Figure 6 Schematic diagram of the structure at A.

[0028] The marks in the figure are:

[0029] 1. Inner tube; 2. Outer tube; 3. Insulation layer; 4. Support ring assembly; 41. First half ring portion; 42. Second half ring portion; 5. Joint assembly; 6. Folding portion; 7. Hexagonal hole; 8. Open groove; 9. Arc groove; 10. First limiting convex ring; 11. First limiting ring groove; 12. Second limiting convex ring; 13. Second limiting ring groove; 14. Limiting groove; 15. Limiting convex portion. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0031] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0032] Example 1:

[0033] This embodiment provides a directly buried plastic-jacketed steel insulated pipeline, comprising:

[0034] Multiple inner tubes 1, two adjacent inner tubes 1 are connected to each other;

[0035] A plurality of outer tubes 2, wherein the outer tubes 2 are sleeved on the inner tube 1;

[0036] The insulation layer 3 is provided between the inner tube 1 and the outer tube 2;

[0037] The support ring assembly 4 is disposed between two adjacent inner tubes 1, and both ends of the support ring assembly 4 respectively contact the ends of the two adjacent outer tubes 2;

[0038] The joint assembly 5 is sleeved between two adjacent outer tubes 2, and the joint assembly 5 is also sleeved on the support ring assembly 4;

[0039] In which, the support ring assembly 4 includes a first semi-ring portion 41 and a second semi-ring portion 42, and the first semi-ring portion 41 and the second semi-ring portion 42 both include a first contact end and a second contact end, and the second contact end of the first semi-ring portion 41 is folded and connected to the second contact end of the second semi-ring portion 42 by a folding portion 6, and the first semi-ring portion 41 and the second semi-ring portion 42 are both provided with a plurality of hexagonal holes 7.

[0040] In this technical solution, the inner tube 1 can be a metal pipe, such as a steel pipe, which has strong load-bearing capacity and pressure resistance.

[0041] The outer tube 2 can be made of plastic material, for example, the outer tube 2 is made of high-density polyethylene material, which has excellent chemical corrosion resistance, can effectively resist the erosion of chemical substances in groundwater and soil, and improve the service life of the pipeline.

[0042] The heat-insulating layer 3 can be made of polyurethane foam material, which has a heat-insulating effect.

[0043] The outer tube 2 is sleeved on the inner tube 1 , and the lengths of the outer tube 2 and the insulation layer 3 are both shorter than the length of the inner tube 1 , so that both ends of the inner tube 1 extend out for installing the support ring assembly 4 .

[0044] The support ring assembly 4 can be made of plastic. The first semi-ring portion 41 and the second semi-ring portion 42 are connected by a folding portion 6, so that the support ring assembly 4 can be opened and closed at the connection. The folding portion 6 is integrally formed with the first semi-ring portion 41 and the second semi-ring portion 42.

[0045] When installing the support ring assembly 4 , the support ring assembly 4 can be opened to create an opening, and pass through the inner tube 1 for easy installation. Then the opening of the support ring assembly 4 can be closed and the joint assembly 5 can be installed.

[0046] The support ring assembly 4 improves the stability of the connection between adjacent inner tubes 1 and reduces the risk of fracture. Several hexagonal holes 7 are formed in both the first and second semi-annular portions 41, 42, helping to slow heat conduction and thereby provide a certain degree of insulation, thereby enhancing the thermal insulation of the insulated pipe. The presence of several hexagonal holes 7 also reduces the weight of the support ring assembly 4, helping to reduce installation load and transportation costs.

[0047] The joint assembly 5 can be made of plastic and can be welded to the outer tube 2 so that the support ring is fixed between the joint assembly 5 and the inner tube 1. The joint assembly 5 is used to further improve the stability of the connection between the pipes, while also ensuring the sealing between adjacent outer tubes 2 to prevent liquid from leaking into the insulation layer 3 and affecting the insulation effect.

[0048] Example 2:

[0049] This embodiment provides a direct-buried plastic-sheathed steel insulated pipeline, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0050] An opening groove 8 is formed on the outer peripheral wall of the support ring assembly 4 , and the opening groove 8 is located outside the folded portion 6 .

[0051] In this technical solution, if Figure 5-7 As shown, when the support ring assembly 4 is in the expanded state, the two sides of the opening groove 8 interfere with each other, which can prevent the support ring assembly 4 from expanding at too large an angle, causing installation inconvenience and breaking of the folded portion 6.

[0052] Furthermore, an arcuate groove 9 is formed on the second contact end of the first semi-ring portion 41 and the second contact end of the second semi-ring portion 42 . The two arcuate grooves 9 are opposite to each other and are located on the inner side of the folded portion 6 .

[0053] In the present technical solution, the provision of the arc-shaped groove 9 can reduce the stress concentration of the folded portion 6 , thereby preventing the folded portion 6 from breaking and increasing the service life of the support ring assembly 4 .

[0054] Example 3:

[0055] This embodiment provides a direct-buried plastic-sheathed steel insulated pipeline, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0056] A first limiting protrusion 10 is provided on the outer circumferential wall at both ends of the inner tube 1 , and a first limiting ring groove 11 is provided on the inner circumferential wall of the support ring assembly 4 . The first limiting protrusion 10 is provided in the first limiting ring groove 11 .

[0057] In this technical solution, the first limiting protrusion 10 is arranged in the first limiting ring groove 11 to limit the support ring assembly 4, avoid axial movement and separation between the inner tubes 1, and further improve the stability of the connection between the inner tubes 1.

[0058] Furthermore, the inner circumferential wall of the joint assembly 5 is provided with a second limiting protrusion 12 , the outer circumferential wall of the support ring assembly 4 is provided with a second limiting ring groove 13 , and the second limiting protrusion 12 is arranged in the second limiting ring groove 13 .

[0059] In this technical solution, the second limiting protrusion ring 12 is arranged in the second limiting ring groove 13 to limit the joint assembly 5 and prevent the joint assembly 5 from axial movement.

[0060] The joint assembly 5 may include two semi-annular connecting parts, which may be connected to each other by arranging flanges. A sealing sheet or adhesive may be used between the flanges to seal the joint assembly 5.

[0061] Example 4:

[0062] This embodiment provides a direct-buried plastic-sheathed steel insulated pipeline, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0063] A limiting groove 14 is provided on the first contact end of the first semi-ring portion 41 and the second contact end of the second semi-ring portion 42 , and a limiting protrusion 15 is provided on the second contact end of the first semi-ring portion 41 and the first contact end of the second semi-ring portion 42 . The limiting protrusion 15 is provided in the limiting groove 14 .

[0064] In the present technical solution, by setting the limiting protrusion 15 in the limiting groove 14, slippage or misalignment between the two semi-annular structures can be avoided, thereby ensuring a more firm and stable connection. It can also prevent the support ring assembly 4 from loosening or displacement when subjected to force, and can also effectively improve the torsion resistance of the support ring assembly 4 under torque.

[0065] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A direct buried plastic-jacketed steel insulated pipeline, characterized in that: include: A plurality of inner tubes (1), wherein two adjacent inner tubes (1) are connected to each other; A plurality of outer tubes (2), wherein the outer tubes (2) are sleeved on the inner tube (1); A heat-insulating layer (3) is provided between the inner tube (1) and the outer tube (2); A support ring assembly (4) is arranged between two adjacent inner tubes (1), and two ends of the support ring assembly (4) respectively contact the ends of the two adjacent outer tubes (2); A joint assembly (5) is sleeved between two adjacent outer tubes (2), and the joint assembly (5) is also sleeved on the support ring assembly (4); The support ring assembly (4) comprises a first semi-ring portion (41) and a second semi-ring portion (42), each of the first semi-ring portion (41) and the second semi-ring portion (42) comprising a first contact end and a second contact end, the second contact end of the first semi-ring portion (41) being folded and connected to the second contact end of the second semi-ring portion (42) via a folding portion (6), and a plurality of hexagonal holes (7) are provided on each of the first semi-ring portion (41) and the second semi-ring portion (42).

2. A direct buried plastic-jacketed steel insulated pipeline according to claim 1, characterized in that: An opening groove (8) is provided on the outer peripheral wall of the support ring assembly (4), and the opening groove (8) is located outside the folding portion (6).

3. A direct buried plastic-jacketed steel insulated pipeline according to claim 2, characterized in that: An arcuate groove (9) is provided on the second contact end of the first semi-annular portion (41) and the second contact end of the second semi-annular portion (42), the two arcuate grooves (9) are opposite to each other, and the arcuate groove (9) is located on the inner side of the folding portion (6).

4. A direct buried plastic-jacketed steel insulated pipeline according to claim 1, characterized in that: A first limiting convex ring (10) is provided on the outer peripheral walls of both ends of the inner tube (1), a first limiting ring groove (11) is provided on the inner peripheral wall of the support ring assembly (4), and the first limiting convex ring (10) is arranged in the first limiting ring groove (11).

5. A direct buried plastic-jacketed steel insulated pipeline according to claim 4, characterized in that: The inner peripheral wall of the joint assembly (5) is provided with a second limiting protruding ring (12), the outer peripheral wall of the support ring assembly (4) is provided with a second limiting ring groove (13), and the second limiting protruding ring (12) is arranged in the second limiting ring groove (13).

6. A direct buried plastic-jacketed steel insulated pipeline according to claim 1, characterized in that: A limiting groove (14) is provided on the first contact end of the first semi-ring portion (41) and the second contact end of the second semi-ring portion (42); a limiting convex portion (15) is provided on the second contact end of the first semi-ring portion (41) and the first contact end of the second semi-ring portion (42); and the limiting convex portion (15) is provided in the limiting groove (14).

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