CN213065149U

CN213065149U - Outer protecting pipe for heat distribution pipeline

Info

Publication number: CN213065149U
Application number: CN202021653365.1U
Authority: CN
Inventors: 莫伟军; 陈强; 林福成
Original assignee: Shandong Xinlanghua Technology Co ltd
Current assignee: Shandong Xinlanghua Technology Co ltd
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2021-04-27
Anticipated expiration: 2030-08-11

Abstract

The application provides an outer pillar for heating power pipeline, heating power pipeline includes that work steel pipe and parcel are in the thermal insulation layer in the work steel pipe outside, the outer jacket cover is in the outside of thermal insulation layer, wherein, a plurality of glass steel straight tubes and a plurality of glass steel bellows that the outer pillar includes interconnect, glass steel bellows sets up between adjacent glass steel straight tube, the outside winding of glass steel straight tube and glass steel bellows's joint position has the sealed solidification zone of glass steel. The utility model provides an outer pillar can avoid the outer pillar to break and leak through the flexible of glass steel flexible corrugated pipe when work steel pipe expend with heat and contract with cold and take place length change. Because the glass fiber reinforced plastic straight pipe and the glass fiber reinforced plastic telescopic corrugated pipe are both made of glass fiber reinforced plastic, the glass fiber cloth coated with resin is wound, the joint position after curing can form an integrated structure, the joint part is not easy to be separated, and the sealing effect of the joint part is better.

Description

Outer protecting pipe for heat distribution pipeline

Technical Field

The application relates to a heat distribution pipeline for conveying steam or other high-temperature media in the fields of power generation, metallurgy, chemical industry, petroleum and the like, in particular to an outer protective pipe for heat preservation and heat insulation of the heat distribution pipeline.

Background

In the fields of power generation, metallurgy, chemical industry, petroleum and the like, a thermal pipeline for conveying steam or other high-temperature media is composed of a working steel pipe, a heat-insulating layer and an outer protecting pipe. The working steel pipe is used for conveying steam or other high-temperature media, and the pressure and the temperature born by the working steel pipe are high. The outer side of the working steel pipe is wrapped with a heat insulation layer for isolating and reducing heat loss and energy consumption. The outer pillar cover is in the outside of insulating layer for restraint insulating layer, prevent simultaneously that moisture from permeating insulating layer, avoid causing the corruption to work steel pipe outer wall.

CN 205479988U discloses a high temperature resistant polyurethane thermal insulation pipeline, including working tube, parcel insulating layer (aerogel) and the aluminium foil reflection cloth of package on the insulating layer on the working tube, be the polyurethane heat preservation between the outer wall of aluminium foil reflection cloth and the inner wall of outer pillar, the outer pillar adopts the high strength polyethylene tube shell. This prior art sets up the insulating layer and has avoided polyurethane decomposition and carbonization because of high temperature leads to. The thermal conductivity coefficient of the aerogel adopted by the thermal insulation layer is smaller than that of the polyurethane, so that the heat dissipation loss is reduced. After the heat of the working tube passes through the aerogel layer, the polyurethane is protected by controlling the temperature below 140 ℃. The heat insulation performance of the polyurethane heat insulation pipe is improved, the heat energy utilization of a pipe network is increased, and the heat loss is reduced. This prior art outer pillar is prefabricated polyethylene pipe, can only install through the mode of wearing the cover, and the joint portion is difficult to carry out sealing connection, easy seepage. If the welding mode is adopted for connection, the outer protective pipe lacks flexibility and is easy to break along with the expansion and contraction of the working pipe.

Disclosure of Invention

The technical problem to be solved by the present application is to provide an outer protection tube for a thermal power pipeline, so as to reduce or avoid the aforementioned problems.

For solving above-mentioned technical problem, the application provides an outer pillar for heating power pipeline, heating power pipeline includes that work steel pipe and parcel are in the thermal insulation layer in the work steel pipe outside, the outer pillar cover is in the outside of thermal insulation layer, wherein, the outer pillar includes a plurality of glass steel straight tubes and a plurality of glass steel bellows of interconnect, glass steel bellows sets up between adjacent glass steel straight tube, the outside winding of glass steel straight tube and glass steel bellows's joint position has glass steel to seal the solidification area.

Preferably, the thermal insulation layer at least comprises an aerogel thermal insulation layer.

Preferably, the heat preservation and insulation layer further comprises a polyurethane heat insulation layer, and the polyurethane heat insulation layer is arranged on the outer side of the aerogel heat insulation layer.

Preferably, the length of the glass fiber reinforced plastic straight pipe is 1-20 m, and the length of the glass fiber reinforced plastic telescopic corrugated pipe is 0.1-3 m.

The utility model provides an outer pillar is made by glass steel straight tube and the flexible bellows of glass steel, and the flexible bellows of glass steel has the elasticity, when the work steel pipe because expend with heat and contract with cold takes place length variation, can avoid the outer pillar to break through the flexible of the flexible bellows of glass steel and leak. Because the glass fiber reinforced plastic straight pipe and the glass fiber reinforced plastic telescopic corrugated pipe are both made of glass fiber reinforced plastic, the glass fiber reinforced plastic sealing and curing belt after curing can form an integrated structure at the joint position through winding glass fiber cloth coated with resin, the joint part is not easy to break away, and the sealing effect is better.

Drawings

The drawings are only for purposes of illustrating and explaining the present application and are not to be construed as limiting the scope of the present application. Wherein the content of the first and second substances,

fig. 1 shows a schematic diagram of an outer jacket for a thermal pipeline according to an embodiment of the present application;

FIG. 2 is an exploded perspective view of an outer jacket for a thermal conduit according to another embodiment of the present application;

figure 3 shows a schematic longitudinal cross-section of an outer jacket for a thermal conduit according to yet another embodiment of the present application;

fig. 4 is a partially enlarged view illustrating a joint portion of an outer jacket for a heat distribution pipeline according to still another embodiment of the present application.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present application, embodiments of the present application will now be described with reference to the accompanying drawings. Wherein like parts are given like reference numerals.

In order to avoid the defects of the prior art, the present application provides an outer protective pipe for a thermal pipeline, as shown in fig. 1, wherein the thermal pipeline can be used for conveying steam or other high-temperature media in the fields of power generation, metallurgy, chemical industry, petroleum and the like. Similar to the prior art, the thermal pipeline of the present application includes a working steel pipe 10 and an insulating layer 20 (for convenience of clarity, the insulating layer is not shown in fig. 1-3, and see fig. 4 for schematic illustration) wrapped outside the working steel pipe 10, and an outer protection pipe 30 is sleeved outside the insulating layer 20. The working steel pipe 10 is used for transporting steam or other high temperature media. The heat insulation layer 20 is used for isolating and reducing heat loss and energy consumption. The outer protective pipe 30 is used for restraining the heat insulation layer, bears external pressure, avoids the damage of the working steel pipe 10, prevents water from permeating the heat insulation layer 20, and avoids corroding the outer wall of the working steel pipe 10.

The present application is different from the prior art in that an outer protective tube 30 with an improved structure is provided, as shown in fig. 1 to 3, the outer protective tube 30 of the present application includes a plurality of glass fiber reinforced plastic straight tubes 31 and a plurality of glass fiber reinforced plastic corrugated tubes 32 that are connected to each other, and the glass fiber reinforced plastic corrugated tubes 32 are disposed between adjacent glass fiber reinforced plastic straight tubes 31. The glass fiber reinforced plastic bellows 32 has elasticity, and when the working steel pipe 10 changes in length due to thermal expansion and contraction, the outer protection pipe 30 can be prevented from being broken and leaking water by the expansion and contraction of the glass fiber reinforced plastic bellows 32.

The glass fiber reinforced plastic is a composite material formed by bonding and curing glass fiber cloth and resin. The glass fiber reinforced plastic straight pipe 31 and the glass fiber reinforced plastic corrugated pipe 32 can be prefabricated into required sizes through a glass fiber reinforced plastic mold. For example, the glass fiber reinforced plastic straight pipe 31 may be prefabricated to have a length of 1 to 20 m, and the glass fiber reinforced plastic expansion bellows 32 may be prefabricated to have a length of 0.1 to 3 m, as required. According to different lengths of the heat distribution pipeline, the heat distribution pipeline can be formed by splicing a prefabricated glass fiber reinforced plastic straight pipe 31 and a glass fiber reinforced plastic telescopic corrugated pipe 32 which have proper lengths. Of course, according to different actual construction conditions, the glass fiber cloth coated with the resin may be wound on the outer side of the thermal insulation layer 20 in a field construction manner, and then cured to form the glass fiber reinforced plastic straight pipe 31. The structure of the glass fiber reinforced plastic corrugated expansion pipe 32 is complex, the required corrugated expansion structure can be obtained only through a glass fiber reinforced plastic mold, and the production is preferably prefabricated through a factory, and then the on-site splicing is suitable.

In addition, with the outer sheath 30 made of glass fiber reinforced plastic, the joint position can be formed into a cured glass fiber reinforced plastic sealing structure by winding. Because the glass fiber reinforced plastic straight pipe 31 and the glass fiber reinforced plastic corrugated pipe 32 are both made of glass fiber reinforced plastic, the glass fiber reinforced plastic sealing and curing belt at the joint position after curing is made of the same material by winding the glass fiber cloth coated with resin, the compatibility of the material is better, the joint position after curing can form an integrated structure, the expansion coefficient and the contraction coefficient of the material at the joint position are the same, the integrated structure after the joint part is cured is not easy to break away, and the sealing effect of the joint part is better.

In the embodiment shown in fig. 4, the glass fiber reinforced plastic bellows 32 is sleeved outside the joint position of the glass fiber reinforced plastic straight pipe 31, but it is also possible to arrange the glass fiber reinforced plastic straight pipe 31 to be sleeved outside the joint position of the glass fiber reinforced plastic bellows 32. The outer side of the joint position of the glass fiber reinforced plastic straight pipe 31 and the glass fiber reinforced plastic corrugated pipe 32 is wound with a glass fiber reinforced plastic sealing and curing belt 33, as mentioned above.

In another embodiment shown in fig. 4, the thermal insulation 20 comprises at least one aerogel insulation 21. In another specific embodiment, the thermal insulation layer 20 may further include a polyurethane thermal insulation layer 22, and the polyurethane thermal insulation layer 22 is disposed outside the aerogel thermal insulation layer 21. Of course, it should be understood by those skilled in the art that the thermal insulation layer 20 may also comprise other materials or structural forms.

It should be appreciated by those skilled in the art that while the present application is described in terms of several embodiments, not every embodiment includes only a single embodiment. The description is thus given for clearness of understanding only, and it is to be understood that all matters in the embodiments are to be interpreted as including all technical equivalents which are encompassed by the claims and are to be interpreted as combined with each other in a different embodiment so as to cover the scope of the present application.

The above description is only illustrative of the present invention and is not intended to limit the scope of the present invention. Any equivalent alterations, modifications and combinations that may be made by those skilled in the art without departing from the spirit and principles of this application shall fall within the scope of this application.

Claims

1. The utility model provides an outer pillar for thermal power pipeline, thermal power pipeline includes work steel pipe (10) and parcel and is in heat preservation insulating layer (20) in the outside of work steel pipe (10), outer pillar (30) cover is in the outside of heat preservation insulating layer (20), its characterized in that, outer pillar (30) are including a plurality of glass steel straight tubes (31) and a plurality of glass steel telescopic corrugated pipe (32) of interconnect, glass steel telescopic corrugated pipe (32) set up between adjacent glass steel straight tube (31), the outside winding of the joint position of glass steel straight tube (31) and glass steel telescopic corrugated pipe (32) has glass steel to seal solidification area (33).

2. The external protective pipe for thermal pipelines according to claim 1, wherein said thermal insulation layer (20) comprises at least one layer of aerogel insulation (21).

3. The outer jacket for a thermal pipe according to claim 2, wherein the thermal insulation layer (20) further comprises a polyurethane thermal insulation layer (22), and the polyurethane thermal insulation layer (22) is disposed outside the aerogel thermal insulation layer (21).

4. An outer protective pipe for a thermal pipeline according to any one of claims 1 to 3, wherein the length of the straight glass fiber reinforced plastic pipe (31) is 1 to 20 m, and the length of the corrugated glass fiber reinforced plastic expansion pipe (32) is 0.1 to 3 m.