CN218523235U

CN218523235U - Thermal bridge-free fixing joint for heat distribution pipeline

Info

Publication number: CN218523235U
Application number: CN202222182886.9U
Authority: CN
Inventors: 刘领诚; 董霞
Original assignee: Shanghai Kehua Thermal Pipe System Co ltd
Current assignee: Shanghai Kehua Thermal Pipe System Co ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2023-02-24
Anticipated expiration: 2032-08-18

Abstract

The utility model provides a thermal bridge-free heating power pipeline fixing joint, which is provided with a working pipe for medium circulation, at least one limiting inner sleeve short pipe is fixed on the outer diameter of the working pipe along the circumferential direction, and a steel outer sleeve short pipe are respectively arranged on the periphery of the working pipe and the inner sleeve short pipe; hard heat-insulating materials are filled between the working pipe and the steel outer sleeve and between the inner sleeve short pipe and the outer sleeve short pipe, and the hard heat-insulating materials are hard microporous calcium silicate tiles and hard polyurethane foam from inside to outside in sequence. The utility model replaces the traditional conical pipe for transmitting axial thrust with a hollow support piece, and fills heat preservation cotton and hard heat preservation material inside and outside the support piece, under the premise of ensuring enough thrust, the heat bridge effect is eliminated, and further the designated position of the steam pipe can be ensured not to generate displacement; meanwhile, the failure of the anti-corrosion layer caused by overheating on the surface of the outer shell can be reduced, and the service life of the heating power pipe network is greatly prolonged.

Description

Thermal bridge-free fixing joint for heat distribution pipeline

Technical Field

The utility model relates to a thermal pipeline for transmitting high temperature medium, concretely relates to no heat bridge thermal pipeline fixed knot.

Background

At present, the technology of prefabricated heat-preservation heat distribution pipelines is widely popularized in China, and for a direct-buried laying heat preservation pipe network system and an overhead heat preservation pipe network system, the external heat preservation of the pipelines is gradually improved in the process of extensive research and optimization, so that the heat loss of the whole heat supply pipe network system is effectively reduced.

FIG. 1 is a schematic view of a fixing joint of a steam direct-buried heat-insulating pipe in the prior art, wherein a conical pipe 1-1 for a working pipe 1 to pass through is arranged in an outer shell, the conical pipe 1-1 provides radial support for an inner steel pipe, and the outer edge of the conical pipe is connected with the outer shell through welding. The heat of the inner steel pipe can be conducted to the tail end of the conical pipe 1-1 to form a heat bridge effect, so that a large temperature difference exists between the surface of the outer sleeve close to the conical pipe 1-1 and a soil layer, the heat loss of the heat supply pipe network is increased rapidly, and an anticorrosive coating on the surface of the outer steel pipe close to the conical pipe 1-1 is damaged rapidly in the past, so that the sealing inside a pipeline is influenced, and the heat supply pipe network is scrapped in advance.

SUMMERY OF THE UTILITY MODEL

The utility model provides a thermal bridge-free heating power pipeline fixing joint, which is provided with a working pipe for medium circulation, wherein at least one limiting inner sleeve short pipe is fixed on the outer diameter of the working pipe along the circumferential direction, and a steel outer sleeve short pipe are respectively arranged on the peripheries of the working pipe and the inner sleeve short pipe;

hard heat insulation materials are filled between the working pipe and the steel outer sleeve pipe and between the inner sleeve short pipe and the outer sleeve short pipe, and the hard heat insulation materials are hard microporous calcium silicate tiles and hard polyurethane foam from inside to outside in sequence.

Furthermore, the compressive strength of the hard microporous calcium silicate tile is 0.6-2.0 MPa, and the compressive strength of the hard polyurethane foam is 0.3-2.0 MPa.

Furthermore, the inner sleeve short pipe is a steel pipeline and is connected with the working pipe in a welding mode.

Furthermore, the outer sleeve short pipe is a steel pipeline and is connected with the steel outer sleeve in a welding mode.

Furthermore, a plurality of limit inner sleeve short pipes arranged on the outer diameter of the working pipe are uniformly arranged in the circumferential direction of the working pipe or are uniformly arranged along the axis of the working pipe.

Further, when the fixed knot is used for directly burying and laying the heating power pipe network, the bottom of overcoat nozzle stub is equipped with the lower plate, and lower plate and overcoat nozzle stub welded connection satisfy sealed waterproof requirement.

Furthermore, a gap is reserved between the inner sleeve short pipe and the lower bottom plate, and auxiliary insulating layers are filled in the gap and the inner cavity of the inner sleeve short pipe.

Furthermore, the auxiliary heat-insulating layer is made of heat-insulating cotton.

The utility model adopts the above mechanism, replace the traditional conical tube that is used for transmitting axial thrust with hollow support piece, and pack heat preservation cotton and stereoplasm insulation material inside and outside support piece respectively, under the prerequisite of guaranteeing thrust, eliminated the heat bridge effect, and then can realize the steam pipe location requirement while, reduced the additional heat dissipation of heating power pipe network remarkably; meanwhile, the failure of the anti-corrosion layer caused by overheating on the surface of the outer shell can be reduced, and the service life of the heating power pipe network is greatly prolonged.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a cross-sectional view of a prior art direct-buried high-temperature steam pipeline susceptible to thermal bridge effects;

fig. 2 is a side sectional view of a thermal bridge-free fixing joint of a thermal pipeline provided by the present invention;

fig. 3 isbase:Sub>A sectional view taken alongbase:Sub>A-base:Sub>A in fig. 2.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

In order to thoroughly understand the present invention, detailed steps and detailed structures will be set forth in the following description so as to explain the technical solution of the present invention. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.

Referring to fig. 2-3, the utility model provides a thermal bridge-free heating power pipeline fixed knot, heating power pipeline fixed knot dispose supply medium circulation's working tube 1, are fixed with at least one spacing endotheca nozzle stub 2 along circumference at working tube 1 external diameter, and the periphery of working tube 1 and endotheca nozzle stub 2 is equipped with steel outer tube 5 and steel overcoat nozzle stub 6 respectively. Hard heat-insulating materials are filled between the working pipe 1 and the steel outer sleeve 5 and between the inner sleeve short pipe 2 and the outer sleeve short pipe 6, and the hard heat-insulating materials are hard microporous calcium silicate tiles 3 and hard polyurethane foam 4 from inside to outside in sequence.

The limiting inner sleeve short pipe 2 is of a hollow structure with the same material as the working pipe 1. In one embodiment, the short pipe 2 of the limiting inner sleeve is a steel pipe, the upper end of the steel pipe is provided with a concave arc surface attached to the outer diameter of the working pipe 1, and the upper end surface of the steel pipe is welded and fixed with the working pipe 1.

When the invention is used for directly burying and laying a heat distribution pipe network, the bottom of the outer sleeve short pipe 6 is provided with the lower bottom plate 8, and the lower bottom plate 8 is connected with the outer sleeve short pipe 6 in a welding way, thereby meeting the sealing and waterproof requirements. As an option, a gap is reserved between the inner sleeve short pipe 2 and the lower bottom plate 8, an auxiliary heat-insulating layer 7 is filled in the gap and the inner cavity of the inner sleeve short pipe 2, and the auxiliary heat-insulating layer 7 can be made of soft heat-insulating cotton. Fill heat preservation cotton and stereoplasm insulation material respectively through inside and outside the spacing endotheca nozzle stub 2 at hollow structure, make the utility model discloses good thermal-insulated thermal insulation performance has been possessed.

In an optional embodiment, the periphery of the limit inner sleeve short pipe 2 is coated with the hard heat-insulating material 3, the hard heat-insulating material 3 can bear the huge axial force of the working pipe 1, the polyurethane foam 4 and the first outer sleeve 5, so that in the invention, the compressive strength of the hard microporous calcium silicate tile 3 is 0.6-2.0 Mpa, and the compressive strength of the hard polyurethane foam 4 is 0.3-2.0 Mpa, so as to bear the acting force of the limit inner sleeve short pipe 2 and ensure the stability of the supporting structure.

The utility model discloses in, by the spacing subassembly that endotheca nozzle stub 2, overcoat nozzle stub 6 and stereoplasm micropore calcium silicate tile 3, rigid polyurethane foam 4 constitute, can establish a set ofly, also can establish several groups, both can be at the circumferencial direction symmetrical arrangement of working pipe 1 or evenly arrange, also can follow 1 axis of working pipe and evenly arrange.

The utility model has the advantages that:

1) The hollow support piece is adopted, and the heat insulation cotton is filled in the hollow support piece and between the hollow support piece and the bottom plate, so that the heat conducted to the tail end of the support piece can be greatly reduced, and the problem that an outer surface anticorrosive coating falls off due to long-term high temperature of the shell is effectively avoided;

2) The hard heat-insulating material is arranged outside the supporting piece, so that the supporting piece can provide support for the pipeline above the supporting piece while playing a role in heat insulation.

The above description is directed to the preferred embodiment of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that devices and structures not described in detail are understood to be implemented in a manner common in the art; without departing from the scope of the invention, it is intended that the present invention shall not be limited to the above-described embodiments, but that the present invention shall include all the modifications and variations of the embodiments. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still fall within the protection scope of the technical solution of the present invention, where the technical entity does not depart from the content of the technical solution of the present invention.

Claims

1. A thermal pipeline fixing joint without a thermal bridge is provided with a working pipe (1) for medium circulation, and is characterized in that at least one limiting inner sleeve short pipe (2) is fixed on the outer diameter of the working pipe (1) along the circumferential direction, and a steel outer sleeve pipe (5) and a steel outer sleeve short pipe (6) are respectively arranged on the peripheries of the working pipe (1) and the inner sleeve short pipe (2);

hard heat-insulating materials are filled between the working pipe (1) and the steel outer sleeve (5) and between the inner sleeve short pipe (2) and the outer sleeve short pipe (6), and the hard heat-insulating materials are hard microporous calcium silicate tiles (3) and hard polyurethane foam (4) from inside to outside in sequence.

2. The heat bridge-free heat distribution pipeline fixing joint as claimed in claim 1, wherein the compression strength of the hard microporous calcium silicate tile (3) is 0.6 Mpa-2.0 Mpa, and the compression strength of the hard polyurethane foam (4) is 0.3 Mpa-2.0 Mpa.

3. The heat-bridge-free thermodynamic pipe fixing joint as claimed in claim 1, wherein the inner sleeve pipe stub (2) is a steel pipe, and is welded to the working pipe (1).

4. Thermal bridge free thermal pipe fixing segment according to claim 1, characterized in that said outer sleeve pipe stub (6) is a steel pipe, welded to said steel outer sleeve (5).

5. The thermal bridge-free heat distribution pipeline fixing joint as claimed in claim 1, wherein the plurality of position-limiting inner sleeve short pipes (2) arranged on the outer diameter of the working pipe (1) are uniformly arranged in the circumferential direction of the working pipe (1) or along the axis of the working pipe (1).

6. The thermal-bridge-free fixing joint for thermal pipelines according to claim 1, wherein when the fixing joint is used for direct-buried laying of thermal pipe networks, the bottom of the outer sleeve short pipe (6) is provided with a lower bottom plate (8), and the lower bottom plate (8) is welded with the outer sleeve short pipe (6).

7. The thermal bridge-free heat distribution pipeline fixing joint as claimed in claim 6, wherein a gap is left between the inner sleeve short pipe (2) and the lower bottom plate (8), and an auxiliary insulating layer (7) is filled in the gap and the inner cavity of the inner sleeve short pipe (2).

8. The thermal bridge-free heat distribution pipeline fixing joint as claimed in claim 7, wherein the auxiliary insulating layer (7) is made of insulating cotton.