CN111981211B

CN111981211B - Heat distribution pipeline

Info

Publication number: CN111981211B
Application number: CN202010798720.2A
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: 2022-02-25
Anticipated expiration: 2040-08-11
Also published as: CN111981211A

Abstract

The application discloses heating power pipeline, be in including working tube (10) and parcel heat preservation insulating layer (20) in the working tube (10) outside, the outside cover of heat preservation insulating layer (20) has outer pillar (30), wherein, outer pillar (30) include a plurality of glass steel straight tubes (31) and a plurality of glass steel bellows (32) of interconnect, glass steel bellows (32) set up between adjacent glass steel straight tube (31). The utility model provides an outer pillar can avoid the outer pillar to break and leak through the flexible of glass steel bellows when the working 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 joint position after curing can form an integrated structure by winding glass fiber cloth coated with resin, and the joint part is not easy to break away.

Description

Heat distribution pipeline

Technical Field

The application relates to the technical field of pipeline conveying systems, in particular to a thermal pipeline for conveying steam or other high-temperature media in the fields of power generation, metallurgy, chemical industry, petroleum and the like.

Background

The heat pipeline for conveying steam or other high-temperature media in the fields of power generation, metallurgy, chemical industry, petroleum and the like is composed of a working pipe, a heat-insulating layer and an outer protecting pipe. The working pipe is used for conveying steam or other high-temperature media, and is high in pressure and temperature. The outer side of the working pipe is wrapped with a heat insulation layer for isolating and reducing heat loss and energy consumption. The outer pillar cover is in the thermal insulation layer outside for restraint thermal insulation layer prevents simultaneously that moisture from permeating thermal insulation layer, avoids causing the corruption to the working 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. The thermal insulation layer is arranged to avoid decomposition and carbonization of polyurethane caused by high temperature. When the insulating layer adopted the aerogel, the coefficient of heat conductivity of aerogel was less than polyurethane coefficient of heat conductivity, has reduced the heat dissipation loss. 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. And welded polyethylene pipe is whole not have any elasticity of stretching out and drawing back, and under the condition that the expansion of being heated produced the hot extension when the working pipe, outer pillar itself that lacks elasticity broke very easily, and groundwater can be followed cracked outer pillar and soaked the heat preservation, can lead to the fact the corruption to the working pipe outer wall.

CN 103912734A discloses prefabricated heat preservation high temperature hot-water line of direct-burried and production method thereof, including working tube, heat preservation and outer pillar, be equipped with the heat preservation between working tube and the outer pillar, the both ends section parcel of outer pillar and heat preservation has the sealed end cap of thermal contraction, is equipped with galvanized steel wire net layer and plain noodles aluminum plate from inside to outside in proper order between working tube and the heat preservation, and the both ends of galvanized steel wire net layer are equipped with the guide positioning ring respectively. Compared with the prior art, the inner-layer temperature-reducing and heat-insulating structure consisting of the air heat-insulating layer and the reflective heat-insulating layer is constructed in the prior art, the temperature of the inner surface interface of the polyurethane heat-insulating layer can be reduced to be below 120 ℃ for a high-temperature medium pipeline with the designed operating temperature of 120-150 ℃, the damage caused by carbonization of a polyurethane material is prevented, and the long-term safe and stable operation of a high-temperature hot water pipeline is ensured. The outer protecting pipe in the prior art also has no telescopic elasticity, and the outer protecting pipe is easy to break when the working pipe is heated and expanded.

CN 106764256A discloses a large-caliber high-compressive-strength high-temperature-resistant heat-insulating pipe and a manufacturing process thereof, and the large-caliber high-compressive-strength high-temperature-resistant heat-insulating pipe comprises a working pipe, a supporting net, an aerogel heat-insulating layer, glass fiber aluminum foil cloth, a positioning bracket, a polyurethane heat-insulating layer, a steel strip reinforced polyethylene spiral corrugated outer protective pipe and an alarm wire, wherein the supporting net is wrapped on the working pipe, and the aerogel heat-insulating layer and the glass fiber aluminum foil cloth are sequentially arranged outside the supporting net; a plurality of positioning brackets are fixed on the outer side of the glass fiber aluminum foil cloth through a packing belt, and an alarm line is axially connected on the positioning brackets in a penetrating manner; and a polyurethane heat-insulating layer and a steel belt reinforced polyethylene spiral corrugated outer protective pipe are sequentially arranged on the outer side of the glass fiber aluminum foil cloth. According to the prior art, the steel belt reinforced polyethylene spiral corrugated outer protection pipe resists the pressure from deeply buried soil, the pipeline heat insulation layer is protected from being damaged by compression, and the problem that the outer protection pipe of the large-caliber hot water heat insulation pipe deforms under pressure is solved. However, although the outer side of the outer sheath of the prior art has spiral ripples, the inner side of the outer sheath is flat, which means that the outer sheath has no elasticity.

Disclosure of Invention

The technical problem to be solved by the present application is to provide a thermal conduit to reduce or avoid the aforementioned problems.

In order to solve the technical problem, the application provides a heating power pipeline, be in including working tube and parcel the thermal insulation layer in the working tube outside, thermal insulation layer's outside cover has the outer pillar, 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.

Preferably, the outer side of the joint position of the glass fiber reinforced plastic straight pipe and the glass fiber reinforced plastic expansion corrugated pipe is wound with a glass fiber reinforced plastic sealing curing belt.

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 thermal insulation layer is including the aerogel insulating layer of parcel in the outside of working pipe, the outside parcel of aerogel insulating layer has the heat radiation reflection stratum, and the outside winding wire mesh on heat radiation reflection stratum is fixed, and it has the polyurethane insulating layer to fill between wire mesh and the outer pillar.

Preferably, two fixing supports which are buckled and connected can be fixedly arranged on the outer side of the middle part of the glass fiber reinforced plastic straight pipe.

Preferably, the two snap-fit connected fixing brackets have the same structure.

Preferably, the fixing support is provided with a semicircular supporting plate attached to the outer surface of the glass fiber reinforced plastic straight pipe, and the tail end of the semicircular supporting plate is provided with a connecting flange.

Preferably, the back of the semicircular supporting plate extends outwards to form a crossed vertical rib plate, and the tail end of the vertical rib plate is provided with a supporting bottom plate.

Preferably, the connecting flange is provided with a first connecting hole for passing a bolt for connection, and the supporting base plate is provided with a second connecting hole for connection.

Preferably, a plurality of annular positioning structures are arranged around the outer side of the working pipe, and the outer protective pipe is supported on the outer side of the working pipe at equal intervals by the positioning structures.

Preferably, the positioning structure is formed by clamping a plurality of positioning brackets with the same structure at the initial positions.

Preferably, one end of each positioning bracket is provided with a dovetail groove, and the other end of each positioning bracket is provided with a dovetail joint capable of being clamped with the dovetail groove.

Preferably, a first support protrusion is provided at the middle of each positioning bracket.

Preferably, each dovetail is snapped into its mating dovetail groove to form a second support tab.

Preferably, the first supporting protrusion is provided with a through hole for passing through a sensor wire.

Preferably, the second supporting protrusion is provided with a through hole for passing through a sensor wire.

Preferably, each positioning structure is formed by clamping 2-6 arc-shaped positioning supports at the initial position.

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.

Preferably, a groove is transversely formed in the middle of the dovetail groove, and a protrusion capable of being in clamping fit with the groove is transversely formed in the middle of the dovetail head.

Preferably, the groove having a depth h1 is formed along the contour edge of the dovetail groove, and the groove is formed laterally symmetrically in the middle of the dovetail groove.

Preferably, along the profile edge of the dovetail, a protrusion of maximum height h2 is formed, with a steep face on one side and a sloped face on the other side.

Preferably, the maximum height h2 of the protrusion is less than or equal to the depth h1 of the groove.

The utility model provides a heating power pipeline's outer pillar adopts glass steel matter to make, and the flexible bellows of glass steel has the elasticity, when the working pipe because expend with heat and contract with cold takes place length variation, can avoid outer pillar fracture to leak through the flexible of the flexible bellows of glass steel. 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.

In addition, the thermal insulation layer of this application has fixed into the compression of aerogel insulating layer by thermal radiation reflection stratum and wire mesh roughly even thickness, avoids the aerogel to fall whitewashed, and the surfacing is convenient for fill the polyurethane insulating layer that obtains even thickness.

This application has set up the fixed bolster at the middle part of the glass steel straight tube of outer protective tube for fix with outside bearing structure or soil layer, when making the glass steel straight tube flexible, the middle part of glass steel straight tube keeps motionless, and only the both ends of glass steel straight tube are flexible, will stretch out and draw back the volume as far as possible to both ends dispersion, and the flexible bellows of glass steel through both ends absorbs flexible stress, avoids glass steel straight tube stress too concentrated and break.

The utility model provides an outer pillar location structure is the loop configuration, therefore no matter how the annular rotates, does not have the problem that supports the interval and change, has ensured that the thickness of the thermal insulation layer between outer pillar and the working pipe can not receive the extrusion change, has improved the thermal-insulated effect that keeps warm.

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 is a schematic diagram of a thermal conduit according to an embodiment of the present application;

FIG. 2 shows a schematic end view of the thermal conduit of FIG. 1;

FIG. 3 is an exploded perspective view of a thermal conduit according to another embodiment of the present application;

FIG. 4 is a schematic longitudinal cross-sectional view of a thermal conduit according to yet another embodiment of the present application;

FIG. 5 is an enlarged partial schematic view of a joint section of a thermal conduit according to yet another embodiment of the present application;

FIG. 6 is a partial cross-sectional structural view of a mounting bracket for a thermal conduit according to an embodiment of the present application;

FIG. 7 is an exploded view of a positioning structure for a thermal conduit according to an embodiment of the present application;

FIG. 8 is an exploded view of a positioning structure for a thermal conduit according to another embodiment of the present application;

FIG. 9 is an enlarged perspective view of a positioning bracket of the positioning structure of FIG. 8;

FIG. 10 is a front view of the positioning bracket of FIG. 9;

FIG. 10a is an enlarged cross-sectional view A-A of FIG. 10;

FIG. 10B is an enlarged cross-sectional view of B-B of FIG. 10.

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 a thermal pipeline which can be used for transporting steam or other high-temperature media in the fields of power generation, metallurgy, chemical industry, petroleum, etc., as shown in fig. 1, which shows a schematic structural diagram of a thermal pipeline according to an embodiment of the present application. Similar to the prior art, the heating power pipeline of this application includes working pipe 10 and parcel at the insulating layer 20 of heat preservation in the working pipe 10 outside, and the outside cover of insulating layer 20 has outer pillar 30. The working pipe 10 is used for conveying 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.

One difference between the present application and the prior art is that an outer jacket 30 of improved construction is proposed, as shown in fig. 1-4, wherein fig. 2 shows a schematic end view of the thermal conduit of fig. 1; FIG. 3 shows an exploded perspective view of a thermal conduit according to another embodiment of the present application; figure 4 shows a schematic longitudinal cross-section of a thermal conduit according to yet another embodiment of the present application. For ease of understanding, the components denoted by reference numeral 40 in fig. 4 are shown exploded.

As shown in the drawings, the outer jacket 30 of the present application includes a plurality of straight glass fiber reinforced plastic pipes 31 and a plurality of corrugated glass fiber reinforced plastic pipes 32 connected to each other, and the corrugated glass fiber reinforced plastic pipes 32 are disposed between adjacent straight glass fiber reinforced plastic pipes 31. The glass fiber reinforced plastic bellows 32 has elasticity, and when the working tube 10 changes in length due to thermal expansion and contraction, the outer protection tube 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. 5, 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. 3 and 5, the thermal insulation layer 20 includes an aerogel thermal insulation layer 21 wrapped on the outer side of the working pipe 10, a thermal radiation reflection layer 22 is wrapped on the outer side of the aerogel thermal insulation layer 21, a wire mesh 23 is wound on the outer side of the thermal radiation reflection layer 22 for fixing, and a polyurethane thermal insulation layer 24 is filled between the wire mesh 23 and the outer protective pipe 30. Aerogel insulating layer 21 is the inside felt that wraps up in the aerogel powder usually, and the surface unevenness after wrapping up the outside of working pipe 10 utilizes heat radiation reflection stratum 22 to wrap up can make aerogel insulating layer 21's surface more level and more smooth, and the aerogel powder thereon also is difficult for droing. In addition, the heat radiation reflecting layer 22 can block a part of high temperature radiation, reduce the high temperature transferred to the polyurethane heat insulation layer 24 and prevent the polyurethane heat insulation layer 24 from being scorched and blackened. The heat radiation reflecting layer 22 is fixed externally by winding the wire mesh 23, and the heat radiation reflecting layer 22 is prevented from coming loose. After the wire mesh 23 is wound, the heat insulating material inside the wire mesh 23 is compressed and fixed to a substantially uniform thickness, a polyurethane foaming agent can be filled between the wire mesh 23 and the outer protective pipe 30, and the polyurethane heat insulating layer 24 is formed after the polyurethane foaming agent is foamed and shaped.

In one embodiment shown in fig. 1-3, two fixing brackets 35 are fixedly arranged outside the middle of one straight glass fiber reinforced plastic pipe 31. The fixing support 35 is used for fixing the middle of the glass fiber reinforced plastic straight pipe 31 with an external supporting structure or a soil layer, so that when the glass fiber reinforced plastic straight pipe 31 stretches, the middle of the glass fiber reinforced plastic straight pipe 31 is kept stationary, only two ends of the glass fiber reinforced plastic straight pipe 31 stretch, the stretching amount is dispersed to the two ends as much as possible, the stretching stress is absorbed through the glass fiber reinforced plastic stretching corrugated pipes 32 at the two ends, and the glass fiber reinforced plastic straight pipe 31 is prevented from being broken due to too concentrated stress. Of course, if necessary, the fixing brackets 35 may be provided on the outer sides of all the straight glass fiber reinforced plastic pipes 31, or the fixing brackets 35 may be provided on the outer sides of the respective straight glass fiber reinforced plastic pipes 31 to be fixed. For example, for the glass fiber reinforced plastic straight pipe 31 with a small length, the expansion and contraction amplitude is relatively small, and the fixing bracket 35 is not needed; and for the glass fiber reinforced plastic straight pipe 31 with larger length, a fixing bracket 35 is preferably arranged.

In one embodiment, as shown, the two snap-fit fastening brackets 35 preferably have the same structure, which facilitates the interchangeable installation, reduces the part types and operation difficulty, and improves the installation efficiency.

In another embodiment shown in fig. 6, the fixing bracket 35 has a semicircular supporting plate 351 attached to the outer surface of the straight glass fiber reinforced plastic pipe 31, a connecting flange 352 is provided at the end of the semicircular supporting plate 351, and a first connecting hole 353 for allowing a bolt (not shown) to pass through for connection is provided on the connecting flange 352. The back of the semicircular supporting plate 351 is extended outward by a crisscross vertical rib 354 (a cross-sectional schematic view of the vertical rib in a dotted line form is provided for convenience of representation in fig. 6), the end of the vertical rib 354 is provided with a supporting bottom plate 355, and the supporting bottom plate 355 is provided with a second connecting hole 356 for connection. In the illustrated embodiment, the second connecting holes 356 are four in number and are disposed at four corners of the support bottom 355.

The two fixing brackets 35 can be buckled and connected together around the glass fiber reinforced plastic straight pipe 31 through the semicircular supporting plate 351, and the connecting flanges 352 of the two fixing brackets 35 can be fixedly connected to the outer side of the glass fiber reinforced plastic straight pipe 31 through bolts. Support base plate 355 may be used to connect to other support structures, for example, when the thermal conduit is overhead, the thermal conduit may be fixedly supported above the support structure by support base plate 355, so that the middle of straight glass fiber reinforced plastic pipe 31 may be prevented from moving. When the thermal power pipeline is buried in the soil layer, the support bottom plate 355 can be connected with a counterweight to prevent the middle part of the glass fiber reinforced plastic straight pipe 31 from moving; or the support bottom plate 355 which directly passes through the vertical rib plate 354 and extends outwards can be used as a barrier to be clamped on the side wall of the buried pipe ditch so as to fix the middle part of the glass fiber reinforced plastic straight pipe 31.

In addition, in the illustrated embodiment, a plurality of annular positioning structures 40 are further disposed at intervals between the outer protective pipe 30 and the working pipe 10, and are used for supporting the outer protective pipe 30 through the positioning structures 40, so as to form an equidistant space between the outer protective pipe 30 and the working pipe 10, so that the thickness of the thermal insulation layer 20 between the outer protective pipe 30 and the working pipe 10 is uniform, and thus the uniform thermal insulation effect is maintained. The locating structure 40 may be placed against the outside of the working tube 10 with the top of the locating structure 40 in contact with the inner surface of the outer sheath 30. Alternatively, the positioning structure 40 may be provided on the outer side of the wire mesh 23, and the space supported by the positioning structure 40 is used for filling the polyurethane thermal insulation layer 24.

More specifically, as shown, a plurality of annular locating structures 40 (two locating structures 40 are shown in fig. 1 and 3) are disposed around the outside of the working tube 10, and the locating structures 40 support the outer sheath 30 at equal intervals on the outside of the working tube 10. In the prior art, the positioning structure is loosely wound on the working pipe 10 by the binding band, and such positioning structure is easily moved to the lower side of the working pipe 10 along the binding band under the action of gravity, so that the positioning support is lacked at the upper parts of the outer protecting pipe 30 and the working pipe 10, and thus the thermal insulation layer 20 is changed into a state that the upper part has a small thickness and the lower part has a large thickness, and the thermal insulation and heat preservation function is gradually lacked at the upper part. The utility model provides a location structure 40 is the loop configuration, therefore no matter how the annular rotates, does not have the problem that supports the interval and change, has guaranteed that the thickness of the thermal insulation layer 20 between outer pillar 30 and the service pipe 10 can not receive the extrusion change, has improved the thermal-insulated effect that keeps warm.

Further, in one embodiment shown in fig. 7, the positioning structure 40 of the present application is formed by first snapping a plurality of positioning brackets 41 having the same structure. In the illustrated embodiment, each positioning structure 40 is formed by four quarter-circle arc positioning brackets 41 which are clamped at the head. Of course, it should be understood by those skilled in the art that each positioning structure 40 may also be formed by first clamping 2-6 circular arc positioning brackets 41 according to actual requirements. The structure of each positioning bracket 41 is the same to reduce the number of parts for efficient assembly operations.

In the illustrated embodiment, the positioning bracket 41 is provided with a dovetail groove 42 at one end and a dovetail 43 at the other end for engaging with the dovetail groove 42.

Furthermore, a first supporting protrusion 44 may be further disposed at the middle of each positioning bracket 41, and a through hole 45 for passing a sensor wire may be further disposed on the first supporting protrusion 44.

In order to increase the density of the supporting points, each dovetail 43 may also be designed to form a second supporting protrusion 46 by engaging with the mating dovetail groove 42, that is, a complete second supporting protrusion 46 is formed just after the dovetail 43 and the dovetail groove 42 are engaged, and the shape of the second supporting protrusion 46 and the shape of the first supporting protrusion 44 in the middle of the positioning bracket 41 may be identical, or a through hole 45 for passing through the sensor wire may be provided thereon as required. If the positioning structure 40 is formed by two positioning brackets 41 being snapped, a total of four supporting protrusions (two first supporting protrusions 44 and two second supporting protrusions 46) are formed after the two positioning brackets 41 are snapped, and if the positioning structure is formed by four positioning brackets 41 as shown in the figure, eight supporting protrusions (four first supporting protrusions 44 and four second supporting protrusions 46) are formed by four positioning brackets 41.

Figures 8-10 show another variant of the positioning structure 400 of the present application, wherein figure 8 shows an exploded schematic view of a positioning structure for a thermal conduit according to another specific embodiment of the present application; FIG. 9 is an enlarged perspective view of a positioning bracket of the positioning structure of FIG. 8; figure 10 shows a front view of the positioning bracket of figure 9. In the following description, the parts different from the aforementioned positioning structure 40 and the parts identical to the aforementioned structure will be described with emphasis on the description, and those skilled in the art can understand them with reference to the drawings.

Specifically, the positioning structure 400 of the present embodiment is also formed by first-position clamping a plurality of positioning brackets 410 having the same structure. In the illustrated embodiment, each positioning structure 400 is formed by four quarter-circle positioning brackets 410 which are clamped at the head, and the structure of each positioning bracket 410 is the same. In the illustrated embodiment, the positioning bracket 410 is provided with a dovetail groove 420 at one end and a dovetail 430 at the other end for engaging with the dovetail groove 420. A first supporting protrusion 440 may be further disposed at the middle of each positioning bracket 410, and a through hole 450 for passing a sensor wire may be further disposed on the first supporting protrusion 440. Each dovetail 430 may also be configured to snap-fit into a mating dovetail slot 420 to form a second support tab 460. The second supporting protrusion 460 may have the same shape as the first supporting protrusion 440 at the middle of the positioning bracket 410, and a through hole 450 for passing a sensor wire may be provided thereon as needed.

The structure of the dovetail groove 420 and the dovetail head 430 engaged with each other on the positioning bracket 410 of the present embodiment is modified from that of the positioning bracket 41 of the previous embodiment. Specifically, as shown in fig. 9-10, the dovetail groove 420 of the present embodiment has a groove 421 transversely formed in the middle thereof, and correspondingly, the dovetail 430 has a protrusion 431 transversely formed in the middle thereof for engaging with the groove 421. Fig. 10a and 10b show schematic cross-sectional structures of the groove 421 and the protrusion 431, respectively.

As shown, a groove 421 having a depth h1 is formed along the contour edge of the dovetail groove 420, and the groove 421 is formed laterally symmetrically in the middle of the dovetail groove 420. Along the profile edge of the dovetail 430, a protrusion 431 of maximum height h2 is formed, the protrusion 431 having a steep face 4311 on one side and a sloped face 4312 on the other side. The maximum height h2 of the protrusions 431 is less than or equal to the depth h1 of the grooves 421.

When the two positioning brackets 41 of the previous embodiment are engaged with each other, the dovetail 43 is easily pulled out from the dovetail groove 42 when being pressed in the transverse direction after the dovetail 43 is transversely inserted into the dovetail groove 42. When the two positioning brackets 410 of the deformation structure of this embodiment are clamped with each other, the dovetail 430 needs to be transversely inserted into the dovetail groove 420 from one side of the slope 4312 of the protrusion 431, and along with the insertion of the dovetail 430, the slope 4312 gradually expands the opening of the dovetail groove 420 (preferably, the positioning bracket 410 is made of metal or plastic with certain elasticity), until the steep surface 4311 of the protrusion 431 falls into the groove 421, the expanded opening of the dovetail groove 420 returns to the original shape, the protrusion 431 integrally falls into and is clamped in the groove 421, and when the protrusion 431 and the groove 421 are transversely pressed, the dovetail 430 cannot be transversely removed from the dovetail groove 420 through the matching of the protrusion 431 and the groove 421.

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. A heating power pipeline comprises a working pipe (10) and a heat insulation layer (20) wrapped on the outer side of the working pipe (10), wherein an outer protective pipe (30) is sleeved on the outer side of the heat insulation layer (20), and the heating power pipeline is characterized in that the outer protective pipe (30) comprises a plurality of glass fiber reinforced plastic straight pipes (31) and a plurality of glass fiber reinforced plastic telescopic corrugated pipes (32) which are connected with each other, the glass fiber reinforced plastic telescopic corrugated pipes (32) are arranged between the adjacent glass fiber reinforced plastic straight pipes (31), and the outer protective pipe (30) is prevented from being broken and leaking water through the expansion of the glass fiber reinforced plastic telescopic corrugated pipes (32); two fixing supports (35) which are buckled and connected are fixedly arranged on the outer side of the middle part of the glass fiber reinforced plastic straight pipe (31), so that the middle part of the glass fiber reinforced plastic straight pipe (31) is kept still during stretching and only two ends stretch; a plurality of annular positioning structures (40, 400) are arranged around the outer side of the working pipe (10), the outer protective pipe (30) is supported on the outer side of the working pipe (10) at equal intervals by the positioning structures (40, 400), and therefore the thickness of the heat insulation layer (20) between the outer protective pipe (30) and the working pipe (10) is uniform; the positioning structure (40, 400) is tightly attached to the outer side of the working pipe (10), and the top of the positioning structure (40) is in contact with the inner surface of the outer protective pipe (30).

2. Thermal pipe according to claim 1, characterised in that said thermal insulation (20) comprises at least one aerogel insulation (21).

3. Thermal pipe according to claim 2, wherein said thermal insulation (20) further comprises a polyurethane insulation layer (24), said polyurethane insulation layer (24) being arranged outside said aerogel insulation layer (21).

4. The heat distribution pipeline according to claim 1, wherein the thermal insulation layer (20) comprises an aerogel thermal insulation layer (21) wrapped on the outer side of the working pipe (10), the outer side of the aerogel thermal insulation layer (21) is wrapped with a thermal radiation reflection layer (22), the outer portion of the thermal radiation reflection layer (22) is wrapped with a wire mesh (23) for fixing, and a polyurethane thermal insulation layer (24) is filled between the wire mesh (23) and the outer protective pipe (30).

5. The heat pipe according to claim 1, wherein the fixing bracket (35) has a semicircular supporting plate (351) attached to the outer surface of the straight glass fiber reinforced plastic pipe (31), a vertical rib (354) extends outwards from the back of the semicircular supporting plate (351), and a supporting bottom plate (355) for fixing is provided at the end of the vertical rib (354).

6. A thermodynamic pipe according to claim 1, wherein the positioning structure (40, 400) is formed by a plurality of positioning brackets (41, 410) of the same structure being snap-fitted end to end.

7. A heat pipe according to claim 6, wherein a first support protrusion (44) is provided at the middle of each positioning bracket (41), and a through hole (45) for passing through the sensor wire is provided on the first support protrusion (44).

8. A thermodynamic pipe according to claim 7, wherein each of the positioning brackets (41, 410) has a dovetail groove (42, 420) at one end and a dovetail head (43, 430) at the other end for engaging with the dovetail groove (42, 420).

9. A thermodynamic pipe according to claim 8, wherein each dovetail (43, 430) snaps into its mating dovetail groove (42, 420) to form a second support protrusion (46), the second support protrusion (46) having the same contour as the first support protrusion (44).

10. A heat pipe according to claim 9, wherein the dovetail groove (420) has a groove (421) with a depth h1 formed in the middle thereof laterally symmetrically, the dovetail (430) has a protrusion (431) with a maximum height h2 transversely disposed in the middle thereof for snap-fit engagement with the groove (421), the protrusion (431) has a steep straight surface (4311) on one side and a sloped surface (4312) on the other side, and the maximum height h2 of the protrusion (431) is less than or equal to the depth h1 of the groove (421).