Steam conveying pipeline and heat supply system

Abstract

The invention discloses a steam conveying pipeline and a heat supply system, and relates to the field of pipelines, and the steam conveying pipeline comprises a working pipe; the working pipe is sleeved with the heat insulation layer; the structure reinforcing layer sleeves the outer side of the heat insulation layer and is separated from the heat insulation layer; the heat reflection layer and the heat preservation layer are arranged on the outer side of the heat insulation layer in a sleeving mode and located between the heat insulation layer and the structure reinforcing layer. The outer side of the structure reinforcing layer is sleeved with the vacuum heat insulation layer; the outer protection pipe is arranged on the outer side of the vacuum heat insulation layer in a sleeving mode, and the outer protection pipe and the vacuum heat insulation layer are separated to form a separation space. Therefore, in the flowing process of steam in the steam conveying pipeline, the heat loss rate can be reduced, energy waste can be reduced, multidirectional heat radiation can be effectively restrained, the deformation risk of the steam conveying pipeline can be reduced, the interval space can provide a deformation space for deformation of the steam conveying pipeline, deformation of an outer protection pipe of the steam conveying pipeline is reduced, and the service life of the steam conveying pipeline is prolonged. And the service life of the steam conveying pipeline is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pipeline, in particular to a steam conveying pipeline and a heating system with the same. BACKGROUND

[0002] In the related art, the existing steam conveying pipeline is buried in the floor, but the settlement of backfill soil can easily cause the steam conveying pipeline to deform, and the heat loss rate is high during the flow of steam in the steam conveying pipeline, which causes serious energy waste. At the same time, the steam conveying pipeline cannot effectively inhibit multidirectional heat radiation, in addition, due to the influence of thermal expansion and cold contraction, the shape of the steam conveying pipeline deforms seriously after long-term use, which affects the service life of the steam conveying pipeline. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a steam conveying pipeline which can reduce the heat loss rate and effectively inhibit multidirectional heat radiation, and can reduce the risk of deformation of the steam conveying pipeline when buried in the floor, thereby reducing the deformation of the outer protective tube of the steam conveying pipeline.

[0004] The present application further provides a heating system.

[0005] According to the steam conveying pipeline of the present application, the steam conveying pipeline comprises: a working tube for conveying steam; a wrapping structure comprising a heat insulation layer, a structure reinforcing layer, a heat reflecting layer and a heat preservation layer, the heat insulation layer being sleeved outside the working tube; the structure reinforcing layer being sleeved outside the heat insulation layer and spaced apart from the heat insulation layer, the heat reflecting layer and the heat preservation layer both being sleeved outside the heat insulation layer, and the heat reflecting layer and the heat preservation layer both being located between the heat insulation layer and the structure reinforcing layer; a vacuum heat insulation layer sleeved outside the structure reinforcing layer; an outer protective tube sleeved outside the vacuum heat insulation layer, the outer protective tube and the vacuum heat insulation layer being spaced apart to form a spacing space between the outer protective tube and the vacuum heat insulation layer, the spacing space being annular and arranged around the vacuum heat insulation layer along the circumferential direction of the vacuum heat insulation layer.

[0006] The steam conveying pipeline according to the embodiment of the present application can reduce heat loss rate and energy waste, effectively inhibit multidirectional heat radiation, reduce the deformation risk of the steam conveying pipeline, provide deformation space for the deformation of the steam conveying pipeline, reduce the deformation of the outer protective pipe of the steam conveying pipeline, and prolong the service life of the steam conveying pipeline.

[0007] In some examples of the present application, the heat reflection layer and the thermal insulation layer are both multiple, and the multiple heat reflection layers and the multiple thermal insulation layers are alternately arranged along the radial direction of the working pipe, one thermal insulation layer is arranged between any two adjacent heat reflection layers, and one heat reflection layer is arranged between any two adjacent thermal insulation layers.

[0008] In some examples of the present application, the structure reinforcing layer is a glass silk cloth structure.

[0009] In some examples of the present application, the thermal insulation layer is an aerogel layer.

[0010] In some examples of the present application, the vacuum thermal insulation layer is a nano airbag structure layer.

[0011] In some examples of the present application, the outer peripheral wall of the outer protective pipe is provided with a corrosion-resistant layer.

[0012] In some examples of the present application, the steam conveying pipeline further comprises an elastic support structure, the elastic support structure is arranged in the spacing space, and the end of the elastic support structure facing the vacuum thermal insulation layer is in contact with the vacuum thermal insulation layer, and the end of the elastic support structure facing the outer protective pipe is in contact with the outer protective pipe.

[0013] In some examples of the present application, the elastic support structure is multiple, and the multiple elastic support structures are arranged in sequence and spaced apart along the circumference of the vacuum thermal insulation layer around the vacuum thermal insulation layer.

[0014] In some examples of the present application, the structure reinforcing layer is multiple, and the multiple structure reinforcing layers are arranged along the radial direction of the working pipe.

[0015] In some examples of the present application, the outer peripheral wall of the working pipe forms a limiting convex part, the wrapping structure is formed with an assembly groove, and the limiting convex part is assembled in the assembly groove.

[0016] The heat supply system according to the embodiment of the present application comprises the steam conveying pipeline described above.

[0017] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the accompanying drawings, wherein: Fig. 1 is a schematic view of a steam delivery pipe according to an embodiment of the present application; Fig. 2 is a schematic view of a steam delivery pipe according to an embodiment of the present application embedded in a floor.

[0019] REFERENCE NUMERALS steam delivery pipe 100; working pipe 10; thermal insulation layer 11; structural reinforcement layer 12; heat reflecting layer 13; thermal insulation layer 14; vacuum insulation layer 15; outer sheath pipe 16; spacing space 17; floor 200; trench 201; first sand backfill layer 202; second sand backfill layer 203; sieved soil layer 204. DETAILED DESCRIPTION

[0020] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters are used throughout the figures and the following description to indicate like components.

[0021] Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements or components throughout. Figs. 1-2 A steam delivery pipe 100 according to an embodiment of the present application is described below, which can be applied in a heating system, and which can deliver steam.

[0022] As Fig. 1As shown, the steam conveying pipeline 100 according to the embodiment of the present application comprises: a working pipe 10 for conveying steam; a wrapping structure comprising a heat insulation layer 11, a structure reinforcing layer 12, a heat reflecting layer 13 and a heat preservation layer 14, the heat insulation layer 11 being sleeved outside the working pipe 10; the structure reinforcing layer 12 being sleeved outside the heat insulation layer 11 and spaced apart from the heat insulation layer 11; the heat reflecting layer 13 and the heat preservation layer 14 both being sleeved outside the heat insulation layer 11, and the heat reflecting layer 13 and the heat preservation layer 14 both being located between the heat insulation layer 11 and the structure reinforcing layer 12; a vacuum heat insulation layer 15 sleeved outside the structure reinforcing layer 12; an outer protective pipe 16 sleeved outside the vacuum heat insulation layer 15, the outer protective pipe 16 and the vacuum heat insulation layer 15 being spaced apart to form a spacing space 17 between the outer protective pipe 16 and the vacuum heat insulation layer 15, the spacing space 17 being annular and arranged around the vacuum heat insulation layer 15 along the circumferential direction of the vacuum heat insulation layer 15.

[0023] The steam conveying pipeline 100 can comprise the working pipe 10, the heat insulation layer 11, the structure reinforcing layer 12, the heat reflecting layer 13, the heat preservation layer 14, the vacuum heat insulation layer 15 and the outer protective pipe 16. The working pipe 10 can be a metal pipe, and the working pipe 10 can be a steel pipe, an iron pipe, an aluminum pipe or the like. Steam can flow along the working pipe 10, so that the working pipe 10 conveys steam.

[0024] The heat insulation layer 11 can be in a tubular structure, and the heat insulation layer 11 is sleeved outside the working pipe 10. The inner surface of the heat insulation layer 11 facing the working pipe 10 can be attached to the working pipe 10. The heat insulation layer 11 can be made of thermal insulation material, which is a material capable of blocking heat flow transmission, also known as thermal insulation material. The thermal insulation material can be glass fiber, asbestos, rock wool, silicate or the like. The heat insulation layer 11 can prevent heat on the working pipe 10 from being conducted to the side away from the working pipe 10 through the heat insulation layer 11, and can also prevent heat on the working pipe 10 from being dissipated through the heat insulation layer 11. The heat insulation layer 11 is sleeved outside the working pipe 10, which is conducive to reducing heat loss during the flow of steam in the steam conveying pipeline 100, can reduce the heat loss rate of the steam conveying pipeline 100, and can reduce energy waste.

[0025] The heat reflection layer 13 can be a tubular structure, the heat reflection layer 13 is sleeved outside the heat insulation layer 11, and the heat reflection layer 13 is located between the heat insulation layer 11 and the structure reinforcing layer 12. The heat reflection layer 13 can be made of a heat reflection material, and the heat reflection layer 13 can be configured as an aluminum foil reflection layer, but the present application is not limited to this. The heat reflection layer 13 can also be made of a heat reflection material as long as the heat reflection layer 13 has the function of reflecting heat. The present application takes the heat reflection layer 13 as an aluminum foil reflection layer as an example for description. The heat reflection layer 13 can reflect heat, and the heat emitted by the heat insulation layer 11 can be reflected back to the heat insulation layer 11 and the working pipe 10 by the heat reflection layer 13. By arranging the heat reflection layer 13, the multi-directional heat radiation can be effectively inhibited during the flow of steam in the steam conveying pipeline 100, the heat loss can be further reduced, the heat loss rate of the steam conveying pipeline 100 can be further reduced, and the energy waste can be further reduced.

[0026] The heat preservation layer 14 can be a tubular structure, the heat preservation layer 14 is sleeved outside the heat insulation layer 11, and the heat preservation layer 14 is located between the heat insulation layer 11 and the structure reinforcing layer 12. As an example, the heat preservation layer 14 can be located between the heat reflection layer 13 and the heat insulation layer 11, the heat reflection layer 13 is sleeved outside the heat preservation layer 14, the inner surface of the heat preservation layer 14 facing the heat insulation layer 11 is attached to the heat insulation layer 11, and the outer surface of the heat preservation layer 14 facing the heat reflection layer 13 is attached to the heat reflection layer 13. As another example, the heat reflection layer 13 is located between the heat preservation layer 14 and the heat insulation layer 11, the heat preservation layer 14 is sleeved outside the heat reflection layer 13, the inner surface of the heat reflection layer 13 facing the heat insulation layer 11 is attached to the heat insulation layer 11, and the outer surface of the heat reflection layer 13 facing the heat preservation layer 14 is attached to the heat preservation layer 14. The heat preservation layer 14 can be made of a heat preservation material, and the heat preservation layer 14 can be made of rock wool, glass wool, phenolic foam and the like. The heat preservation layer 14 has a heat preservation effect, which can further reduce heat loss during the flow of steam in the steam conveying pipeline 100, further reduce the heat loss rate of the steam conveying pipeline 100, and further reduce energy waste.

[0027] The structural reinforcement layer 12 is sleeved outside the heat insulation layer 11, and the structural reinforcement layer 12 is arranged in a spaced-apart manner with the heat insulation layer 11, the heat reflecting layer 13 and the thermal insulation layer 14 are arranged between the heat insulation layer 11 and the structural reinforcement layer 12, the structural reinforcement layer 12 and the heat reflecting layer 13 are attached in the case that the heat reflecting layer 13 is adjacent to the structural reinforcement layer 12, the structural reinforcement layer 12 and the thermal insulation layer 14 are attached in the case that the thermal insulation layer 14 is adjacent to the structural reinforcement layer 12, and the application is described by taking the case that the thermal insulation layer 14 is arranged adjacent to the structural reinforcement layer 12 as an example. The thermal insulation layer 14 is located on the side of the structural reinforcement layer 12 close to the working pipe 10. The structural reinforcement layer 12 has the effect of improving the structural strength. The structural reinforcement layer 12 can be made of carbon fiber material, but the application is not limited thereto. The structural reinforcement layer 12 can also be made of other materials as long as it has the effect of improving the structural strength. By arranging the structural reinforcement layer 12, the overall structural strength and stability of the working pipe 10, the heat insulation layer 11, the heat reflecting layer 13, the thermal insulation layer 14 and the structural reinforcement layer 12 are improved. In the case that the steam conveying pipeline 100 is buried in the floor 200, the soil pressure can be effectively resisted, and the risk of deformation of the steam conveying pipeline 100 can be reduced.

[0028] The vacuum heat insulation layer 15 can have a tubular structure. The vacuum heat insulation layer 15 is sleeved outside the structural reinforcement layer 12. The inner surface of the vacuum heat insulation layer 15 facing the structural reinforcement layer 12 can be attached to the outer surface of the structural reinforcement layer 12 facing the vacuum heat insulation layer 15. The structural reinforcement layer 12 can reliably support the vacuum heat insulation layer 15. A vacuum cavity can be formed in the vacuum heat insulation layer 15. The vacuum heat insulation layer 15 is annular and arranged around the structural reinforcement layer 12 along the circumference of the structural reinforcement layer 12. The vacuum cavity is annular and arranged around the structural reinforcement layer 12 along the circumference of the structural reinforcement layer 12. By arranging the vacuum heat insulation layer 15, the vacuum heat insulation layer 15 has a heat insulation effect, can form a vacuum heat insulation barrier outside the structural reinforcement layer 12, can further reduce heat loss during the flow of steam in the steam conveying pipeline 100, can further reduce the heat loss rate of the steam conveying pipeline 100, and can further reduce energy waste.

[0029] The outer protective pipe 16 can be a metal pipe, and the outer protective pipe 16 can be a steel pipe, an iron pipe, an aluminum pipe or the like. The outer protective pipe 16 is arranged outside the vacuum heat insulation layer 15, and the outer protective pipe 16 is the outermost pipe layer structure of the steam conveying pipe 100. The outer protective pipe 16 can further improve the structural strength of the steam conveying pipe 100, and the outer protective pipe 16 can protect the working pipe 10, the heat insulation layer 11, the structural reinforcement layer 12, the heat reflection layer 13, the thermal insulation layer 14 and the vacuum heat insulation layer 15. The outer protective pipe 16 can resist external pressure and reduce the risk of deformation of the working pipe 10, the heat insulation layer 11, the structural reinforcement layer 12, the heat reflection layer 13, the thermal insulation layer 14 and the vacuum heat insulation layer 15. The outer protective pipe 16 is spaced apart from the vacuum heat insulation layer 15 to form a spacing space 17 between the outer protective pipe 16 and the vacuum heat insulation layer 15. The spacing space 17 is annular, and the spacing space 17 is arranged around the vacuum heat insulation layer 15 along the circumferential direction of the vacuum heat insulation layer 15. The spacing space 17 extends along the length direction of the steam conveying pipe 100. An elastic support structure can be arranged between the outer protective pipe 16 and the vacuum heat insulation layer 15, and the elastic support structure is supported between the outer protective pipe 16 and the vacuum heat insulation layer 15, so that the outer protective pipe 16 and the vacuum heat insulation layer 15 are spaced apart. The outer protective pipe 16 and the vacuum heat insulation layer 15 are spaced apart to form the spacing space 17 therebetween. When the steam conveying pipe 100 is in thermal expansion, the overall structure of the working pipe 10, the heat insulation layer 11, the structural reinforcement layer 12, the heat reflection layer 13, the thermal insulation layer 14 and the vacuum heat insulation layer 15 can deform into the spacing space 17. The spacing space 17 can provide an elastic deformation space for the thermal expansion of the steam conveying pipe 100, reduce the risk of extrusion of the outer protective pipe 16 by the overall structure of the working pipe 10, the heat insulation layer 11, the structural reinforcement layer 12, the heat reflection layer 13, the thermal insulation layer 14 and the vacuum heat insulation layer 15, and reduce the risk of deformation of the outer protective pipe 16 of the steam conveying pipe 100. This is conducive to prolonging the service life of the steam conveying pipe 100. In addition, when the soil pressure causes the outer protective pipe 16 to deform into the steam conveying pipe 100, the spacing space 17 can provide a deformation space for the outer protective pipe 16, reduce the risk of extrusion of the vacuum heat insulation layer 15 by the outer protective pipe 16, and further prolong the service life of the steam conveying pipe 100.

[0030] According to the steam conveying pipe 100 of the embodiment of the present application, the heat insulation layer 11, the structural reinforcement layer 12, the heat reflection layer 13, the thermal insulation layer 14, the vacuum heat insulation layer 15 and the outer protective pipe 16 are combined. During the flow of steam in the steam conveying pipe 100, the heat loss rate can be reduced, the energy waste can be reduced, the multi-directional heat radiation can be effectively inhibited, the risk of deformation of the steam conveying pipe 100 can be reduced when the steam conveying pipe 100 is buried in the floor 200, the spacing space 17 can provide a deformation space for the deformation of the steam conveying pipe 100, the outer protective pipe 16 of the steam conveying pipe 100 can be deformed, and the service life of the steam conveying pipe 100 can be prolonged.

[0031] In some embodiments of the present application, the outer peripheral wall of the working pipe 10 forms a limiting protrusion (not shown in the figure), and the wrapping structure is formed with an assembly groove (not shown in the figure), and the limiting protrusion is assembled in the assembly groove.

[0032] In some embodiments of the present application, the assembly groove is recessed away from the working pipe 10, the limiting protrusion protrudes from the outer peripheral wall of the working pipe 10 towards the wrapping structure, at least part of the limiting protrusion is assembled in the assembly groove, or the entire structure of the limiting protrusion is assembled in the assembly groove, and the shape of the assembly groove and the shape of the limiting protrusion are matched. As an example, the limiting protrusion can be a spiral guide rib, and the limiting protrusion is arranged around the working pipe 10 along the circumferential direction of the working pipe 10. As another example, the limiting protrusion includes a plurality of bosses, the plurality of bosses are distributed at different positions of the working pipe 10, any two adjacent bosses are arranged with a spacing, and the assembly groove is a plurality of assembly grooves, the plurality of assembly grooves and the plurality of bosses are arranged one by one. By assembling the limiting protrusion in the assembly groove, the risk of relative movement of the working pipe 10 and the wrapping structure in the axial direction is reduced, which is conducive to making the steam conveying pipeline 100 resist the settlement shear force of the backfill soil, and can reduce the axial displacement of the steam conveying pipeline 100.

[0033] In some embodiments of the present application, the heat-reflecting layer 13 and the heat-insulating layer 14 are both a plurality of layers, and the plurality of heat-reflecting layers 13 and the plurality of heat-insulating layers 14 are arranged alternately along the radial direction of the working pipe 10, one heat-insulating layer 14 is arranged between any two adjacent heat-reflecting layers 13, and one heat-reflecting layer 13 is arranged between any two adjacent heat-insulating layers 14.

[0034] The heat reflection layer 13 and the heat preservation layer 14 are both multiple, and the heat reflection layer 13 and the heat preservation layer 14 can be provided in two, three, four, five or the like, the number of the heat reflection layer 13 can be reasonably selected according to actual conditions, and the number of the heat preservation layer 14 can be reasonably selected according to actual conditions, and the heat reflection layer 13 and the heat preservation layer 14 are both provided in four as an example for description. Along the radial direction of the working pipe 10, or along the radial direction of the steam conveying pipeline 100, the multiple heat reflection layers 13 and the multiple heat preservation layers 14 are arranged alternately, one heat preservation layer 14 is arranged between any two adjacent heat reflection layers 13, and one heat reflection layer 13 is arranged between any two adjacent heat preservation layers 14. By providing multiple heat reflection layers 13, the multiple heat reflection layers 13 can reflect heat at the same time, the multiple heat reflection layers 13 are greater than 95% of the radiation heat, and more heat can be reflected back to the inside of the steam conveying pipeline 100, which is beneficial to improve the heat reflection effect of the steam conveying pipeline 100, can better inhibit the multi-directional heat radiation during the flow of steam in the steam conveying pipeline 100, can further reduce the heat loss of the steam conveying pipeline 100, can further reduce the heat loss rate of the steam conveying pipeline 100, and can further reduce energy waste. By providing multiple heat preservation layers 14, the heat preservation effect of the steam conveying pipeline 100 can be further improved, the heat loss of the steam conveying pipeline 100 can be further reduced, the heat loss rate of the steam conveying pipeline 100 can be further reduced, and energy waste can be further reduced.

[0035] In some embodiments of the present application, the structural reinforcement layer 12 can be a glass cloth structure. When the structural reinforcement layer 12 is adjacent to the heat preservation layer 14, the glass cloth structure can be wound on the inner heat preservation layer 14, and when the structural reinforcement layer 12 is adjacent to the heat reflection layer 13, the glass cloth structure can be wound on the inner heat reflection layer 13, and the glass cloth structure wound on the inner heat preservation layer 14 is taken as an example for description.

[0036] The glass cloth structure has high heat resistance and excellent heat resistance, and can maintain stable performance in a high temperature environment. In addition, the glass cloth structure has high tensile strength and can withstand large loads, which is beneficial to improve the structural strength of the steam conveying pipeline 100 and the use reliability of the steam conveying pipeline 100. In addition, the glass cloth structure is soft and easy to process, which is beneficial to improve the production efficiency of the steam conveying pipeline 100.

[0037] In some embodiments of the present application, the thermal insulation layer 11 is an aerogel layer, which can be a silica aerogel layer, a graphene aerogel layer, etc. The present application takes the silica aerogel layer as an example for description. The aerogel layer can block heat conduction, and the thermal conductivity of the aerogel layer can be less than 0.02 W / (m·K), which can be 0.019 W / (m·K), 0.018 W / (m·K), etc. The aerogel layer has excellent thermal insulation performance, which is conducive to improving the thermal insulation effect of the thermal insulation layer 11, thereby improving the thermal insulation effect of the steam conveying pipeline 100. In addition, the aerogel layer is resistant to high temperature, which is conducive to maintaining the stability of the thermal insulation layer 11 during the flow of steam in the steam conveying pipeline 100, thereby maintaining the thermal insulation effect of the steam conveying pipeline 100, and further improving the working reliability of the steam conveying pipeline 100.

[0038] In some embodiments of the present application, the vacuum thermal insulation layer 15 is a nano airbag structure layer. The nano airbag structure layer has good thermal insulation performance, which can effectively reduce the loss of the steam conveying pipeline 100. In addition, the nano airbag structure layer is light in weight, which can achieve good thermal insulation effect without increasing the weight and space occupation of the steam conveying pipeline 100. At the same time, the nano airbag structure layer has excellent weather resistance, which can adapt to high temperature, low temperature and high humidity environment, thereby maintaining the stable thermal insulation performance of the steam conveying pipeline 100. In addition, the nano airbag structure layer has good fireproof performance, which can prevent the spread of fire to a certain extent and improve the safety of the use place. In addition, the nano airbag structure layer has a long service life, which can stably play the role of thermal insulation for a long time, thereby reducing the cost of maintenance and replacement.

[0039] In some embodiments of the present application, the central axis of the outer protective pipe 16 and the central axis of the vacuum insulation layer 15 are collinear, which can also be understood as the central axis of the outer protective pipe 16 and the central axis of the vacuum insulation layer 15 coincide. Such an arrangement can make the spacing distance of the outer protective pipe 16 and the vacuum insulation layer 15 uniform along the circumference of the steam conveying pipeline 100. When the steam conveying pipeline 100 is subjected to thermal expansion, the overall structure of the working pipe 10, the insulation layer 11, the structural reinforcement layer 12, the heat reflecting layer 13, the thermal insulation layer 14 and the vacuum insulation layer 15 can deform into the spacing space 17, which can provide elastic deformation space for the thermal expansion of the steam conveying pipeline 100, further reducing the risk of the overall structure of the working pipe 10, the insulation layer 11, the structural reinforcement layer 12, the heat reflecting layer 13, the thermal insulation layer 14 and the vacuum insulation layer 15 pressing the outer protective pipe 16, further reducing the risk of deformation of the outer protective pipe 16 of the steam conveying pipeline 100, and when the soil pressure causes the outer protective pipe 16 to deform into the steam conveying pipeline 100, the spacing space 17 can provide deformation space for the outer protective pipe 16, further reducing the risk of the outer protective pipe 16 pressing the vacuum insulation layer 15, which is beneficial to further prolong the service life of the steam conveying pipeline 100.

[0040] In some embodiments of the present application, the outer peripheral wall of the outer protective pipe 16 is provided with a corrosion-resistant layer. In other words, the surface of the outer protective pipe 16 facing away from the spacing space 17 is provided with a corrosion-resistant layer, which can be an epoxy resin coating, a polyethylene coating, an epoxy coal tar pitch coating, etc. The manufacturing material of the corrosion-resistant layer can be reasonably selected according to actual use, as long as it can prevent the outer protective pipe 16 from being corroded. By providing a corrosion-resistant layer on the outer peripheral wall of the outer protective pipe 16, the corrosion-resistant layer has a corrosion-resistant effect, which can reduce the risk of corrosion of the steam conveying pipeline 100 when it is buried in the floor 200, and is beneficial to further prolong the service life of the steam conveying pipeline 100.

[0041] In some embodiments of the present application, the steam conveying pipeline 100 can further include an elastic support structure (not shown in the figure), which is arranged in the spacing space 17 and along the radial direction of the working pipe 10, and the end of the elastic support structure facing the vacuum insulation layer 15 is in contact with the vacuum insulation layer 15, and the end of the elastic support structure facing the outer protective pipe 16 is in contact with the outer protective pipe 16.

[0042] The elastic support structure can be a spring, rubber or the like structure, is arranged in the interval space 17, and the inner end of the elastic support structure is in contact with the vacuum heat insulation layer 15 along the radial direction of the working pipe 10, i.e. the radial direction of the steam conveying pipeline 100, and the outer end of the elastic support structure is in contact with the outer protective pipe 16. The elastic support structure can support the vacuum heat insulation layer 15 and the outer protective pipe 16, so that the vacuum heat insulation layer 15 and the outer protective pipe 16 are kept apart, which is beneficial to keep the interval space 17 formed between the vacuum heat insulation layer 15 and the outer protective pipe 16. When the steam conveying pipeline 100 is in thermal expansion, the overall structure of the working pipe 10, the heat insulation layer 11, the structural reinforcement layer 12, the heat reflecting layer 13, the heat preservation layer 14 and the vacuum heat insulation layer 15 can be deformed into the interval space 17, which can provide elastic deformation space for the thermal expansion of the steam conveying pipeline 100, and at the same time, the elastic support structure is compressed and deformed. The elastic support structure has elastic force, and then when the steam conveying pipeline 100 is in cold shrinkage, the elastic support structure can apply elastic force to the vacuum heat insulation layer 15, which is beneficial to the overall structure of the working pipe 10, the heat insulation layer 11, the structural reinforcement layer 12, the heat reflecting layer 13, the heat preservation layer 14 and the vacuum heat insulation layer 15 to restore the original shape. Moreover, when the soil presses the outer protective pipe 16, the elastic support structure can support the outer protective pipe 16, which is beneficial to reduce the deformation of the outer protective pipe 16.

[0043] In some embodiments of the present application, the elastic support structure is a plurality of elastic support structures, which are arranged in sequence and spaced apart along the circumference of the vacuum heat insulation layer 15. The elastic support structure can extend along the extension direction of the steam conveying pipeline 100, i.e. along the length direction of the steam conveying pipeline 100. By arranging a plurality of elastic support structures, the plurality of elastic support structures are simultaneously supported between the vacuum heat insulation layer 15 and the outer protective pipe 16, which is more beneficial to keep the interval space 17 formed between the vacuum heat insulation layer 15 and the outer protective pipe 16. When the steam conveying pipeline 100 is in cold shrinkage, the plurality of elastic support structures can simultaneously apply elastic force to the vacuum heat insulation layer 15, which is more beneficial to the overall structure of the working pipe 10, the heat insulation layer 11, the structural reinforcement layer 12, the heat reflecting layer 13, the heat preservation layer 14 and the vacuum heat insulation layer 15 to restore the original shape. Moreover, when the soil presses the outer protective pipe 16, the plurality of elastic support structures can simultaneously support the outer protective pipe 16, which is more beneficial to reduce the deformation of the outer protective pipe 16.

[0044] In some embodiments of the present application, the structural reinforcement layer 12 is multiple, and the multiple structural reinforcement layers 12 are arranged along the radial direction of the working pipe 10. Among them, the structural reinforcement layer 12 can be provided in two, three, four or the like, and the number of structural reinforcement layers 12 can be reasonably selected according to actual use. The multiple structural reinforcement layers 12 can be arranged along the radial direction of the working pipe 10, that is, the multiple structural reinforcement layers 12 can be arranged along the radial direction of the steam conveying pipeline 100, the multiple structural reinforcement layers 12 can be arranged adjacently, and the multiple structural reinforcement layers 12 are sequentially sleeved and assembled. By providing multiple structural reinforcement layers 12, the overall structural strength and stability of the working pipe 10, the heat insulation layer 11, the heat reflection layer 13, the thermal insulation layer 14 and the structural reinforcement layer 12 can be further improved, and the steam conveying pipeline 100 buried in the floor 200 can more effectively resist soil pressure and further reduce the risk of deformation of the steam conveying pipeline 100.

[0045] The manufacturing process of the steam conveying pipeline 100 is as follows: first, rusting the working pipe 10, then wrapping the heat insulation layer 11, the heat reflection layer 13, the thermal insulation layer 14, the heat reflection layer 13, the thermal insulation layer 14, the heat reflection layer 13, the thermal insulation layer 14, the heat reflection layer 13, the thermal insulation layer 14 in turn, then winding the structural reinforcement layer 12 for reinforcement, then sleeving the vacuum insulation layer 15, then sleeving the outer protective pipe 16, and finally detecting the steam conveying pipeline 100 for air tightness. It should be noted that an adhesive layer can be provided between adjacent layers to bond and fix the adjacent two layers, for example, an adhesive layer is provided between the thermal insulation layer 14 and the heat reflection layer 13 to fix the adjacent two thermal insulation layers 14 and heat reflection layers 13.

[0046] As shown in Fig. 2 The burying step of the steam conveying pipeline 100 is as follows: digging a trench 201 at the floor 200, then laying a first sand backfill layer 202 on the bottom wall of the trench 201, then placing the steam conveying pipeline 100 above the first sand backfill layer 202, the first sand backfill layer 202 supporting the steam conveying pipeline 100, then backfilling a second sand backfill layer 203 above the first sand backfill layer 202 and tamping, and the second sand backfill layer 203 burying the steam conveying pipeline 100, then backfilling a sieved soil layer 204 above the second sand backfill layer 203, so that the upper surface of the sieved soil layer 204 is flush with the upper surface of the floor 200. The first sand backfill layer 202 and the second sand backfill layer 203 can both be composed of medium-coarse sand. The first sand backfill layer 202 and the second sand backfill layer 203 can absorb the settlement stress of the sieved soil layer 204, which is beneficial to reduce the stress on the steam conveying pipeline 100, and the first sand backfill layer 202 and the second sand backfill layer 203 can both use polymer solidified sand (adding polyacrylamide), which is beneficial to increase the soil stability and eliminate the tamping process, and the compressive strength after solidification is ≥15MPa.

[0047] In some embodiments of the present application, the steam delivery pipeline 100 can further comprise a gas pressure sensor, which can be arranged in the working pipe 10 and can detect the pressure of the steam in the working pipe 10. The gas pressure sensor can be in communication connection with the controller, and the controller can acquire the detection information of the gas pressure sensor in real time. When the gas pressure sensor detects that the gas pressure in the working pipe 10 is greater than a first preset threshold, it indicates that the pressure in the working pipe 10 is too high, and the working pipe 10 has a risk of blockage. At this time, the controller can control the alarm device to issue a first alarm information to prompt the staff that the working pipe 10 has a risk of blockage, so that the staff can timely repair and reduce the risk of explosion of the steam delivery pipeline 100. When the gas pressure sensor detects that the gas pressure in the working pipe 10 is less than a second preset threshold, which is less than the first preset threshold, it indicates that the pressure in the working pipe 10 is too low, and the working pipe 10 has a risk of gas leakage. At this time, the controller can control the alarm device to issue a second alarm information to prompt the staff that the working pipe 10 has a risk of gas leakage, so that the staff can timely repair and reduce energy waste. The first alarm information can be one of sound alarm information and light alarm information, and the second alarm information can be the other one of sound alarm information and light alarm information.

[0048] According to the heat supply system of the embodiment of the present application, the steam delivery pipeline 100 of the above-mentioned embodiments is included. The heat loss rate of the heat supply system can be reduced, the energy waste of the heat supply system can be reduced, and the use reliability of the heat supply system can be improved.

[0049] Other configurations of the steam delivery pipeline 100 according to the embodiment of the present application are known to those skilled in the art, and will not be described in detail here.

[0050] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A steam conveying pipeline, characterized in that, include: Working pipe, the working pipe being used to transport steam; The encapsulation structure includes a heat insulation layer, a structural reinforcement layer, a heat reflective layer, and a thermal insulation layer. The heat insulation layer is sleeved on the outside of the working pipe. The structural reinforcement layer is sleeved on the outside of the heat insulation layer and spaced apart from it. The heat reflective layer and the thermal insulation layer are both sleeved on the outside of the heat insulation layer and are located between the heat insulation layer and the structural reinforcement layer. A vacuum insulation layer, wherein the vacuum insulation layer is sleeved on the outside of the structural reinforcement layer; An outer protective tube is sleeved on the outside of the vacuum insulation layer. The outer protective tube and the vacuum insulation layer are spaced apart to form a gap space between them. The gap space is annular and is arranged around the vacuum insulation layer along its circumference.

2. The steam conveying pipeline according to claim 1, characterized in that, There are multiple heat-reflective layers and multiple heat-insulating layers arranged alternately along the radial direction of the working pipe. An insulation layer is provided between any two adjacent heat-reflective layers and an insulation layer is provided between any two adjacent heat-insulating layers.

3. The steam conveying pipeline according to claim 1, characterized in that, The structural reinforcement layer is a glass fiber cloth structure.

4. The steam conveying pipeline according to claim 1, characterized in that, The heat insulation layer is an aerogel layer.

5. The steam conveying pipeline according to claim 1, characterized in that, The vacuum insulation layer is a nano-airbag structure layer.

6. The steam conveying pipeline according to claim 1, characterized in that, The outer peripheral wall of the outer protective tube is provided with an anti-corrosion layer.

7. The steam transmission pipeline according to any one of claims 1-6, characterized in that, The steam transmission pipeline further includes: an elastic support structure, which is disposed within the interval space and along the radial direction of the working pipe. The end of the elastic support structure facing the vacuum insulation layer is in contact with the vacuum insulation layer, and the end of the elastic support structure facing the outer protective pipe is in contact with the outer protective pipe.

8. The steam conveying pipeline according to claim 7, characterized in that, The elastic support structure comprises multiple structures, which are arranged sequentially and spaced apart around the vacuum insulation layer along its circumference.

9. The steam transmission pipeline according to any one of claims 1-6, characterized in that, The structural reinforcement layer comprises multiple layers, which are arranged radially along the working tube.

10. The steam transmission pipeline according to any one of claims 1-6, characterized in that, The outer peripheral wall of the working tube has a limiting protrusion, and the wrapping structure has an assembly groove, in which the limiting protrusion is assembled.

11. A heating system, characterized in that, Includes a steam transport pipeline according to any one of claims 1-10.

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