CN210196798U - Low-temperature vacuum pipeline - Google Patents
Low-temperature vacuum pipeline Download PDFInfo
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- CN210196798U CN210196798U CN201920921054.XU CN201920921054U CN210196798U CN 210196798 U CN210196798 U CN 210196798U CN 201920921054 U CN201920921054 U CN 201920921054U CN 210196798 U CN210196798 U CN 210196798U
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Abstract
The utility model discloses a low-temperature vacuum pipeline, belonging to the field of low-temperature pipelines, comprising an inner pipe, an outer pipe, a heat bridge, a waveform compensator and a plurality of heat insulation supports; the inner pipe is sleeved in the outer pipe, and two ends of the outer pipe are fixed on the inner pipe through a thermal bridge; a vacuum gap is formed between the inner pipe and the outer pipe, and a plurality of heat insulation supports are sleeved on the inner pipe; the heat insulation support is annular and is used for maintaining the distance between the inner pipe and the outer pipe; and one side of the outer pipe is provided with a waveform compensator for providing displacement compensation when the inner pipe contracts at low temperature. The utility model discloses a low temperature vacuum pipeline has that intensity is good, the heat leakage is little, low temperature stress automatic compensation, the flow of carrying the medium is big, can realize characteristics such as transport of super remote low temperature medium.
Description
Technical Field
The utility model belongs to the low temperature pipeline field, specifically speaking relate to a low temperature vacuum pipeline.
Background
The low-temperature vacuum pipeline consists of an inner pipe, an outer pipe, a low-temperature adsorbent and a multi-layer heat-insulating material. The outer surface of the inner pipe is coated with a plurality of layers of heat insulating materials which are compounded to reduce radiation heat transfer; the interlayer gap between the inner pipe and the outer pipe is pumped into a high vacuum state to reduce convection heat transfer; the inner pipe and the outer pipe are isolated by adopting a material with low heat conductivity coefficient so as to reduce solid heat transfer and fully meet the long-distance transportation of low-temperature cryogenic media such as low-temperature liquid oxygen, liquid nitrogen, liquid argon, liquefied natural gas and the like.
However, the existing low-temperature vacuum pipeline has large heat leakage when being transported for a long distance; when the pipeline conveys low-temperature media, the inner pipe shrinks, and low-temperature stress exists; the distribution of the support load cannot be automatically adjusted according to the gravitational load of the inner tube and the medium.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned weak point provide a low temperature vacuum pipe, and the current low temperature vacuum pipe of proposition solution, when long distance transport, the heat leakage is big, has low temperature stress, the unable problem that the automatic distribution load supported. In order to achieve the above object, the utility model provides a following technical scheme:
a low-temperature vacuum pipeline comprises an inner pipe 1, an outer pipe 2, a heat bridge 3, a wave compensator 4 and a plurality of heat insulation supports 5; the inner pipe 1 is sleeved in the outer pipe 2, and two ends of the outer pipe 2 are fixed on the inner pipe 1 through the thermal bridge 3; a vacuum gap is formed between the inner pipe 1 and the outer pipe 2, and a plurality of heat insulation supports 5 are sleeved on the inner pipe 1; the heat insulation support 5 is annular and is used for maintaining the distance between the inner pipe 1 and the outer pipe 2; and a waveform compensator 4 is arranged on one side of the outer pipe 2 and used for providing displacement compensation when the inner pipe 1 contracts at low temperature. As can be seen from the above structure, the plurality of heat insulation supports 5 are distributed on the inner pipe 1 at equal intervals and are uniformly supported, but a plurality of compact heat insulation supports 5 are provided on both sides of the wave compensator 4, for example, two heat insulation supports are provided on both sides, so as to improve the supporting strength near the wave compensator 4; the two ends of the outer pipe 2 are fixed on the inner pipe 1 through a thermal bridge 3, and the thermal bridge 3 enables a sealed vacuum gap to be formed between the inner pipe 1 and the outer pipe 2; a high vacuum gap is formed between the inner pipe and the outer pipe to prevent the residual gas in the gap from convective heat transfer; in addition, the strength is ensured, meanwhile, the heat conduction path is prolonged through the heat bridge 3, and the thermal resistance is increased, so that the heat leakage of the pipe end (subjected to heat preservation treatment) after the pipeline is welded with the pipeline port is reduced, and the heat loss of a low-temperature medium is reduced; for a low-temperature vacuum pipeline for long-distance transmission, a plurality of heat insulation supports 5 are sleeved on the inner pipe 1, the heat insulation supports 5 are annular and used for keeping the distance between the inner pipe 1 and the outer pipe 2, and the heat loss of a medium is small; the drift diameter of the pipeline is large, the flow of the conveying medium is large, and the ultra-long distance low-temperature medium can be conveyed; the wave compensator 4 is arranged on one side of the outer pipe 2, so that the rigidity of the whole pipeline can be ensured to be good when the pipeline is installed in a factory and on site, and the pipeline can be hoisted better; the wave compensator 4 is arranged on the outer pipe 2 and only bears atmospheric pressure load and displacement load when the inner pipe 1 contracts, and compared with the wave compensator arranged on the inner pipe 1, the wave compensator 4 arranged on the outer pipe can ensure higher fatigue life and service life because the wave compensator arranged on the inner pipe 1 needs to bear larger pressure and low temperature influence of a medium; the vacuum tube with the structure can meet the requirement of medium transportation from low pressure to high pressure by adjusting the wall thickness of the inner tube 1 according to the medium transportation pressure.
Further, the insulating support 5 comprises a ring body 51, an outer protrusion 52 and an inner protrusion 53; a plurality of convex parts 52 which can contact with the inner wall of the outer pipe 2 are arranged on the outer ring surface of the ring body 51; a plurality of inner bulges 53 which can be contacted with the outer wall of the inner tube 1 are arranged on the inner ring surface of the ring body 51. According to the structure, the outer bulge 52 and the inner bulge 53 enable the inner pipe 1 and the outer pipe 2 to be in multi-point contact with the heat insulation support 5, and heat leakage is reduced; the heat insulation support 5 is in sliding contact with the outer pipe 2, so that the wave compensator 4 can provide displacement compensation when the inner pipe 1 contracts at low temperature, and the working condition deformation of the inner pipe and the working condition deformation of the outer pipe are ensured to coordinately release low-temperature stress; the distance between the inner pipe 1 and the outer pipe 2 is kept by the heat insulation support 5 and the gravity load of the inner pipe 1 and the medium is carried.
Further, the plurality of protrusions 52 are uniformly distributed at equal intervals; the plurality of inner protrusions 53 are uniformly distributed at equal intervals; the plurality of outer projections 52 and the plurality of inner projections 53 are staggered. According to the structure, the outer bulges 52 are uniformly distributed at equal intervals, the inner bulges 53 are uniformly distributed at equal intervals, the outer bulges 52 and the inner bulges 53 are arranged in a staggered manner, when the heat-insulating support 5 bears the gravity load of the inner pipe 1 and a medium, the force can be uniformly distributed on the heat-insulating support 5 according to the load, and the outer bulges 52 and the inner bulges 53 are arranged in a staggered manner to have the function of automatically distributing the load; when the load of a certain convex 52 or inner convex 53 is large, the load can be distributed to the adjacent convex 52 or inner convex 53 due to the coordination of the deformation of the whole supporting structure, and the support is ensured to be safe and reliable under the working condition.
Further, the two adjacent inner bulges 53 and the ring body 51 enclose an inner arched bridge hole 54; the adjacent two outer protrusions 52 and the ring body 51 enclose an outer arched bridge opening 55. According to the structure, the contact surfaces of the inner pipe 1 and the outer pipe 2 and the heat insulation support 5 are reduced by the inner arched bridge hole 54 and the outer arched bridge hole 55, and the heat conduction path of the heat insulation support is increased on the premise that the strength is met, so that the heat resistance is increased, and the heat leakage of the heat insulation support is reduced; the beam is designed into a bridge type annular structure according to the principle of an equal-strength beam, and the distribution of loads can be automatically distributed according to the loads; the contact points between the inner pipe and the outer pipe of the structural support are staggered, so that the function of prolonging the heat conduction path and increasing the thermal resistance is realized, the heat leakage of the heat insulation support 5 is reduced, and the integral rigidity of the support is reduced to obtain better micro-deformation coordination; when the heat insulation support 5 bears the load, the load can be distributed to other support points according to the coordination of the deformation of the whole support, the strength of the support in the working process is ensured to be within an allowable range, and the service life of the support is prolonged.
Furthermore, the top of the convex 52 is provided with a convex cambered surface which is jointed with the inner wall of the outer tube 2; the top of the inner protrusion 53 is provided with an inner concave cambered surface which is attached to the outer wall of the inner pipe 1. As can be seen from the above structure, the outer protrusion 52 is sufficiently supported by the inner wall of the outer tube 2, and the inner protrusion 53 is sufficiently supported by the outer wall of the inner tube 1.
Further, the thermal bridge 3 includes an upper ring portion 31, a middle cylindrical portion 32 and a lower ring portion 33; the middle cylinder part 32 is sleeved between the inner pipe 1 and the outer pipe 2; the outer inner side of the upper ring part 31 is respectively fixed at one end of the outer pipe 2 and the outer end of the middle cylinder part 32; the outer side and the inner side of the lower ring part 33 are respectively fixed on the inner end of the middle cylinder part 32 and the outer wall of the inner pipe 1. According to the structure, the middle cylinder part 32 extends the heat conduction path and has the function of increasing the thermal resistance, so that the heat leakage of the pipe end (for heat preservation treatment) after the pipeline is welded with the pipeline port is reduced, and the heat loss of the low-temperature medium is reduced.
Further, the device also comprises a plurality of supporting and fixing frames 6; the supporting and fixing frame 6 comprises a clamping part 61 and a fixing part 62; the clamping part 61 is provided with a groove 63; the groove 63 is used for being clamped on the ring body 51 between the two outer protrusions 52; the clamping part 61 and the fixing part 62 are connected into a whole, and the fixing part 62 is fixed on the outer wall of the inner tube 1. In the above structure, the heat insulating support 5 is fixed on the inner pipe 1 through the support fixing frame 6 and is in slidable contact with the outer pipe 2; the groove 63 is intended to be blocked on the ring 51 between the two projections 52, facilitating the installation and replacement of the insulating support 5.
Further, a vacuum valve 21 for obtaining a vacuum gap is arranged on the outer tube 2; the outer wall of the inner pipe 1 is coated with a radiation-resistant heat-insulating layer. According to the structure, the anti-radiation heat-insulating layer, namely the outer surface of the inner pipe is coated with the composite material which has extremely low heat conductivity coefficient and radiation shielding capability and has a specific thickness, so that radiation heat transfer between the inner pipe and the outer pipe is shielded; the vacuum valve 21 makes the interlayer cavity formed between the inner and outer tubes in a high vacuum state, and shields the convection heat transfer between the inner and outer tubes.
Furthermore, the drift diameter of the inner tube 1 is DN 80-DN 500. From the above structure, the working pressure: 0.8-32 MPa; and (3) drift diameter: DN 80-DN 500; vacuum life: the year is more than or equal to 8; the use temperature is as follows: heat leakage per meter at-260-100 ℃: less than or equal to 5W (the specific heat leakage quantity is different according to the pipe diameter); suitable media are: LN2, LO2, LNG, etc.
The utility model has the advantages that:
1. the utility model discloses a low-temperature vacuum pipeline, a high vacuum gap is formed between an inner pipe and an outer pipe to prevent the convection heat transfer of residual gas in the gap; the heat conduction path is prolonged through the heat bridge 3, so that the heat resistance is increased, and heat leakage of the pipe end (subjected to heat preservation treatment) after the pipeline is welded with the pipeline port is reduced; the wave compensator 4 is arranged on one side of the outer pipe 2, so that the rigidity of the whole pipeline can be ensured to be good when the pipeline is installed in a factory and on site, the pipeline can be hoisted well, and the wave compensator 4 arranged on the outer pipe can be ensured to obtain higher fatigue life and service life; on the premise of meeting the strength, the heat-conducting path of the heat-insulating support 5 is increased, so that the thermal resistance is increased, and the heat leakage of the heat-insulating support is reduced; the beam is designed into a bridge type annular structure according to the principle of an equal-strength beam, and the distribution of loads can be automatically distributed according to the loads; the contact points between the inner pipe and the outer pipe of the structural support are staggered, so that the function of prolonging the heat conduction path and increasing the thermal resistance is realized, the heat leakage of the heat insulation support 5 is reduced, and the integral rigidity of the support is reduced to obtain better micro-deformation coordination.
Drawings
FIG. 1 is a schematic view of the cut-away interior structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention near the adiabatic support;
FIG. 3 is a schematic view of the heat insulating support of the present invention;
FIG. 4 is a left side view schematic diagram of the heat insulating support of the present invention;
FIG. 5 is a schematic view of the structure near the thermal bridge of the present invention;
FIG. 6 is a schematic view of the heat insulating support and inner tube fitting structure of the present invention;
in the drawings: 1-inner tube, 2-outer tube, 3-thermal bridge, 4-wave compensator, 5-heat insulation support, 51-ring body, 52-outer protrusion, 53-inner protrusion, 54-inner arch bridge hole, 55-outer arch bridge hole, 31-upper ring part, 32-middle tube part, 33-lower ring part, 6-support fixing frame, 61-clamping part, 62-fixing part, 63-groove and 21-vacuum valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.
The first embodiment is as follows:
see figures 1-6. A low-temperature vacuum pipeline comprises an inner pipe 1, an outer pipe 2, a heat bridge 3, a wave compensator 4 and a plurality of heat insulation supports 5; the inner pipe 1 is sleeved in the outer pipe 2, and two ends of the outer pipe 2 are fixed on the inner pipe 1 through the thermal bridge 3; a vacuum gap is formed between the inner pipe 1 and the outer pipe 2, and a plurality of heat insulation supports 5 are sleeved on the inner pipe 1; the heat insulation support 5 is annular and is used for maintaining the distance between the inner pipe 1 and the outer pipe 2; and a waveform compensator 4 is arranged on one side of the outer pipe 2 and used for providing displacement compensation when the inner pipe 1 contracts at low temperature. As can be seen from the above structure, the plurality of heat insulation supports 5 are distributed on the inner pipe 1 at equal intervals and are uniformly supported, but a plurality of compact heat insulation supports 5 are provided on both sides of the wave compensator 4, for example, two heat insulation supports are provided on both sides, so as to improve the supporting strength near the wave compensator 4; the two ends of the outer pipe 2 are fixed on the inner pipe 1 through a thermal bridge 3, and the thermal bridge 3 enables a sealed vacuum gap to be formed between the inner pipe 1 and the outer pipe 2; a high vacuum gap is formed between the inner pipe and the outer pipe to prevent the residual gas in the gap from convective heat transfer; in addition, the strength is ensured, meanwhile, the heat conduction path is prolonged through the heat bridge 3, and the thermal resistance is increased, so that the heat leakage of the pipe end (subjected to heat preservation treatment) after the pipeline is welded with the pipeline port is reduced, and the heat loss of a low-temperature medium is reduced; for a low-temperature vacuum pipeline for long-distance transmission, a plurality of heat insulation supports 5 are sleeved on the inner pipe 1, the heat insulation supports 5 are annular and used for keeping the distance between the inner pipe 1 and the outer pipe 2, and the heat loss of a medium is small; the drift diameter of the pipeline is large, the flow of the conveying medium is large, and the ultra-long distance low-temperature medium can be conveyed; the wave compensator 4 is arranged on one side of the outer pipe 2, so that the rigidity of the whole pipeline can be ensured to be good when the pipeline is installed in a factory and on site, and the pipeline can be hoisted better; the wave compensator 4 is arranged on the outer pipe 2 and only bears atmospheric pressure load and displacement load when the inner pipe 1 contracts, and compared with the wave compensator arranged on the inner pipe 1, the wave compensator 4 arranged on the outer pipe can ensure higher fatigue life and service life because the wave compensator arranged on the inner pipe 1 needs to bear larger pressure and low temperature influence of a medium; the vacuum tube with the structure can meet the requirement of medium transportation from low pressure to high pressure by adjusting the wall thickness of the inner tube 1 according to the medium transportation pressure.
Example two:
see figures 1-6. A low-temperature vacuum pipeline comprises an inner pipe 1, an outer pipe 2, a heat bridge 3, a wave compensator 4 and a plurality of heat insulation supports 5; the inner pipe 1 is sleeved in the outer pipe 2, and two ends of the outer pipe 2 are fixed on the inner pipe 1 through the thermal bridge 3; a vacuum gap is formed between the inner pipe 1 and the outer pipe 2, and a plurality of heat insulation supports 5 are sleeved on the inner pipe 1; the heat insulation support 5 is annular and is used for maintaining the distance between the inner pipe 1 and the outer pipe 2; and a waveform compensator 4 is arranged on one side of the outer pipe 2 and used for providing displacement compensation when the inner pipe 1 contracts at low temperature. As can be seen from the above structure, the plurality of heat insulation supports 5 are distributed on the inner pipe 1 at equal intervals and are uniformly supported, but a plurality of compact heat insulation supports 5 are provided on both sides of the wave compensator 4, for example, two heat insulation supports are provided on both sides, so as to improve the supporting strength near the wave compensator 4; the two ends of the outer pipe 2 are fixed on the inner pipe 1 through a thermal bridge 3, and the thermal bridge 3 enables a sealed vacuum gap to be formed between the inner pipe 1 and the outer pipe 2; a high vacuum gap is formed between the inner pipe and the outer pipe to prevent the residual gas in the gap from convective heat transfer; in addition, the strength is ensured, meanwhile, the heat conduction path is prolonged through the heat bridge 3, and the thermal resistance is increased, so that the heat leakage of the pipe end (subjected to heat preservation treatment) after the pipeline is welded with the pipeline port is reduced, and the heat loss of a low-temperature medium is reduced; for a low-temperature vacuum pipeline for long-distance transmission, a plurality of heat insulation supports 5 are sleeved on the inner pipe 1, the heat insulation supports 5 are annular and used for keeping the distance between the inner pipe 1 and the outer pipe 2, and the heat loss of a medium is small; the drift diameter of the pipeline is large, the flow of the conveying medium is large, and the ultra-long distance low-temperature medium can be conveyed; the wave compensator 4 is arranged on one side of the outer pipe 2, so that the rigidity of the whole pipeline can be ensured to be good when the pipeline is installed in a factory and on site, and the pipeline can be hoisted better; the wave compensator 4 is arranged on the outer pipe 2 and only bears atmospheric pressure load and displacement load when the inner pipe 1 contracts, and compared with the wave compensator arranged on the inner pipe 1, the wave compensator 4 arranged on the outer pipe can ensure higher fatigue life and service life because the wave compensator arranged on the inner pipe 1 needs to bear larger pressure and low temperature influence of a medium; the vacuum tube with the structure can meet the requirement of medium transportation from low pressure to high pressure by adjusting the wall thickness of the inner tube 1 according to the medium transportation pressure.
The insulating support 5 comprises a ring 51, an outer projection 52 and an inner projection 53; a plurality of convex parts 52 which can contact with the inner wall of the outer pipe 2 are arranged on the outer ring surface of the ring body 51; a plurality of inner bulges 53 which can be contacted with the outer wall of the inner tube 1 are arranged on the inner ring surface of the ring body 51. According to the structure, the outer bulge 52 and the inner bulge 53 enable the inner pipe 1 and the outer pipe 2 to be in multi-point contact with the heat insulation support 5, and heat leakage is reduced; the heat insulation support 5 is in sliding contact with the outer pipe 2, so that the wave compensator 4 can provide displacement compensation when the inner pipe 1 contracts at low temperature, and the working condition deformation of the inner pipe and the working condition deformation of the outer pipe are ensured to coordinately release low-temperature stress; the distance between the inner pipe 1 and the outer pipe 2 is kept by the heat insulation support 5 and the gravity load of the inner pipe 1 and the medium is carried.
Example three:
see figures 1-6. A low-temperature vacuum pipeline comprises an inner pipe 1, an outer pipe 2, a heat bridge 3, a wave compensator 4 and a plurality of heat insulation supports 5; the inner pipe 1 is sleeved in the outer pipe 2, and two ends of the outer pipe 2 are fixed on the inner pipe 1 through the thermal bridge 3; a vacuum gap is formed between the inner pipe 1 and the outer pipe 2, and a plurality of heat insulation supports 5 are sleeved on the inner pipe 1; the heat insulation support 5 is annular and is used for maintaining the distance between the inner pipe 1 and the outer pipe 2; and a waveform compensator 4 is arranged on one side of the outer pipe 2 and used for providing displacement compensation when the inner pipe 1 contracts at low temperature. As can be seen from the above structure, the plurality of heat insulation supports 5 are distributed on the inner pipe 1 at equal intervals and are uniformly supported, but a plurality of compact heat insulation supports 5 are provided on both sides of the wave compensator 4, for example, two heat insulation supports are provided on both sides, so as to improve the supporting strength near the wave compensator 4; the two ends of the outer pipe 2 are fixed on the inner pipe 1 through a thermal bridge 3, and the thermal bridge 3 enables a sealed vacuum gap to be formed between the inner pipe 1 and the outer pipe 2; a high vacuum gap is formed between the inner pipe and the outer pipe to prevent the residual gas in the gap from convective heat transfer; in addition, the strength is ensured, meanwhile, the heat conduction path is prolonged through the heat bridge 3, and the thermal resistance is increased, so that the heat leakage of the pipe end (subjected to heat preservation treatment) after the pipeline is welded with the pipeline port is reduced, and the heat loss of a low-temperature medium is reduced; for a low-temperature vacuum pipeline for long-distance transmission, a plurality of heat insulation supports 5 are sleeved on the inner pipe 1, the heat insulation supports 5 are annular and used for keeping the distance between the inner pipe 1 and the outer pipe 2, and the heat loss of a medium is small; the drift diameter of the pipeline is large, the flow of the conveying medium is large, and the ultra-long distance low-temperature medium can be conveyed; the wave compensator 4 is arranged on one side of the outer pipe 2, so that the rigidity of the whole pipeline can be ensured to be good when the pipeline is installed in a factory and on site, and the pipeline can be hoisted better; the wave compensator 4 is arranged on the outer pipe 2 and only bears atmospheric pressure load and displacement load when the inner pipe 1 contracts, and compared with the wave compensator arranged on the inner pipe 1, the wave compensator 4 arranged on the outer pipe can ensure higher fatigue life and service life because the wave compensator arranged on the inner pipe 1 needs to bear larger pressure and low temperature influence of a medium; the vacuum tube with the structure can meet the requirement of medium transportation from low pressure to high pressure by adjusting the wall thickness of the inner tube 1 according to the medium transportation pressure.
The insulating support 5 comprises a ring 51, an outer projection 52 and an inner projection 53; a plurality of convex parts 52 which can contact with the inner wall of the outer pipe 2 are arranged on the outer ring surface of the ring body 51; a plurality of inner bulges 53 which can be contacted with the outer wall of the inner tube 1 are arranged on the inner ring surface of the ring body 51. According to the structure, the outer bulge 52 and the inner bulge 53 enable the inner pipe 1 and the outer pipe 2 to be in multi-point contact with the heat insulation support 5, and heat leakage is reduced; the heat insulation support 5 is in sliding contact with the outer pipe 2, so that the wave compensator 4 can provide displacement compensation when the inner pipe 1 contracts at low temperature, and the working condition deformation of the inner pipe and the working condition deformation of the outer pipe are ensured to coordinately release low-temperature stress; the distance between the inner pipe 1 and the outer pipe 2 is kept by the heat insulation support 5 and the gravity load of the inner pipe 1 and the medium is carried.
The plurality of protrusions 52 are evenly distributed at equal intervals; the plurality of inner protrusions 53 are uniformly distributed at equal intervals; the plurality of outer projections 52 and the plurality of inner projections 53 are staggered. According to the structure, the outer bulges 52 are uniformly distributed at equal intervals, the inner bulges 53 are uniformly distributed at equal intervals, the outer bulges 52 and the inner bulges 53 are arranged in a staggered manner, when the heat-insulating support 5 bears the gravity load of the inner pipe 1 and a medium, the force can be uniformly distributed on the heat-insulating support 5 according to the load, and the outer bulges 52 and the inner bulges 53 are arranged in a staggered manner to have the function of automatically distributing the load; when the load of a certain convex 52 or inner convex 53 is large, the load can be distributed to the adjacent convex 52 or inner convex 53 due to the coordination of the deformation of the whole supporting structure, and the support is ensured to be safe and reliable under the working condition.
The two adjacent inner bulges 53 and the ring body 51 form an inner arched bridge opening 54; the adjacent two outer protrusions 52 and the ring body 51 enclose an outer arched bridge opening 55. According to the structure, the contact surfaces of the inner pipe 1 and the outer pipe 2 and the heat insulation support 5 are reduced by the inner arched bridge hole 54 and the outer arched bridge hole 55, and the heat conduction path of the heat insulation support 5 is increased on the premise that the strength is met, so that the heat resistance is increased, and the heat leakage of the heat insulation support is reduced; the beam is designed into a bridge type annular structure according to the principle of an equal-strength beam, and the distribution of loads can be automatically distributed according to the loads; the contact points between the inner pipe and the outer pipe of the structural support are staggered, so that the function of prolonging the heat conduction path and increasing the thermal resistance is realized, the heat leakage of the heat insulation support 5 is reduced, and the integral rigidity of the support is reduced to obtain better micro-deformation coordination; when the heat insulation support 5 bears the load, the load can be distributed to other support points according to the coordination of the deformation of the whole support, the strength of the support in the working process is ensured to be within an allowable range, and the service life of the support is prolonged.
The top of the convex 52 is provided with a convex cambered surface which is jointed with the inner wall of the outer tube 2; the top of the inner protrusion 53 is provided with an inner concave cambered surface which is attached to the outer wall of the inner pipe 1. As can be seen from the above structure, the outer protrusion 52 is sufficiently supported by the inner wall of the outer tube 2, and the inner protrusion 53 is sufficiently supported by the outer wall of the inner tube 1.
The thermal bridge 3 comprises an upper ring part 31, a middle cylinder part 32 and a lower ring part 33; the middle cylinder part 32 is sleeved between the inner pipe 1 and the outer pipe 2; the outer inner side of the upper ring part 31 is respectively fixed at one end of the outer pipe 2 and the outer end of the middle cylinder part 32; the outer side and the inner side of the lower ring part 33 are respectively fixed on the inner end of the middle cylinder part 32 and the outer wall of the inner pipe 1. According to the structure, the middle cylinder part 32 extends the heat conduction path and has the function of increasing the thermal resistance, so that the heat leakage of the pipe end (for heat preservation treatment) after the pipeline is welded with the pipeline port is reduced, and the heat loss of the low-temperature medium is reduced.
Also comprises a plurality of supporting and fixing frames 6; the supporting and fixing frame 6 comprises a clamping part 61 and a fixing part 62; the clamping part 61 is provided with a groove 63; the groove 63 is used for being clamped on the ring body 51 between the two outer protrusions 52; the clamping part 61 and the fixing part 62 are connected into a whole, and the fixing part 62 is fixed on the outer wall of the inner tube 1. In the above structure, the heat insulating support 5 is fixed on the inner pipe 1 through the support fixing frame 6 and is in slidable contact with the outer pipe 2; the groove 63 is intended to be blocked on the ring 51 between the two projections 52, facilitating the installation and replacement of the insulating support 5.
The outer tube 2 is provided with a vacuum valve 21 for obtaining a vacuum gap; the outer wall of the inner pipe 1 is coated with a radiation-resistant heat-insulating layer. According to the structure, the anti-radiation heat-insulating layer, namely the outer surface of the inner pipe is coated with the composite material which has extremely low heat conductivity coefficient and radiation shielding capability and has a specific thickness, so that radiation heat transfer between the inner pipe and the outer pipe is shielded; the vacuum valve 21 makes the interlayer cavity formed between the inner and outer tubes in a high vacuum state, and shields the convection heat transfer between the inner and outer tubes.
The drift diameter of the inner tube 1 is DN 80-DN 500. From the above structure, the working pressure: 0.8-32 MPa; and (3) drift diameter: DN 80-DN 500; vacuum life: the year is more than or equal to 8; the use temperature is as follows: heat leakage per meter at-260-100 ℃: less than or equal to 5W (the specific heat leakage quantity is different according to the pipe diameter); suitable media are: LN2, LO2, LNG, etc.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.
Claims (9)
1. A cryogenic vacuum line, comprising: comprises an inner pipe (1), an outer pipe (2), a thermal bridge (3), a wave compensator (4) and a plurality of heat insulation supports (5); the inner pipe (1) is sleeved in the outer pipe (2), and two ends of the outer pipe (2) are fixed on the inner pipe (1) through the thermal bridge (3); a vacuum gap is formed between the inner pipe (1) and the outer pipe (2), and a plurality of heat insulation supports (5) are sleeved on the inner pipe (1); the heat insulation support (5) is annular and is used for keeping the distance between the inner pipe (1) and the outer pipe (2); and one side of the outer pipe (2) is provided with a waveform compensator (4) for providing displacement compensation when the inner pipe (1) contracts at low temperature.
2. A cryogenic vacuum pipe according to claim 1, wherein: the heat insulation support (5) comprises a ring body (51), an outer bulge (52) and an inner bulge (53); a plurality of convex protrusions (52) which can be contacted with the inner wall of the outer pipe (2) are arranged on the outer ring surface of the ring body (51); a plurality of inner bulges (53) which can be contacted with the outer wall of the inner pipe (1) are arranged on the inner ring surface of the ring body (51).
3. A cryogenic vacuum pipe according to claim 2, wherein: the plurality of protrusions (52) are uniformly distributed at equal intervals; the inner bulges (53) are uniformly distributed at equal intervals; the plurality of outer bulges (52) and the plurality of inner bulges (53) are arranged in a staggered way.
4. A cryogenic vacuum pipe according to claim 3, wherein: the two adjacent inner bulges (53) and the ring body (51) enclose an inner arch-shaped bridge opening (54); the two adjacent outer bulges (52) and the ring body (51) are surrounded to form an outer arched bridge opening (55).
5. A cryogenic vacuum pipe according to claim 2, wherein: the top of the outer bulge (52) is provided with an outer bulge cambered surface which is attached to the inner wall of the outer pipe (2); the top of the inner protrusion (53) is provided with an inner concave cambered surface which is attached to the outer wall of the inner pipe (1).
6. A cryogenic vacuum pipe according to claim 1, wherein: the thermal bridge (3) comprises an upper ring part (31), a middle cylinder part (32) and a lower ring part (33); the middle cylinder part (32) is sleeved between the inner pipe (1) and the outer pipe (2); the outer inner side of the upper ring part (31) is respectively fixed at one end of the outer pipe (2) and the outer end of the middle cylinder part (32); the outer side and the inner side of the lower ring part (33) are respectively fixed on the inner end of the middle cylinder part (32) and the outer wall of the inner pipe (1).
7. A cryogenic vacuum pipe according to claim 2, wherein: also comprises a plurality of supporting and fixing frames (6); the supporting and fixing frame (6) comprises a clamping part (61) and a fixing part (62); a groove (63) is formed in the clamping part (61); the groove (63) is used for being clamped on the ring body (51) between the two outer protrusions (52); the clamping part (61) and the fixing part (62) are connected into a whole, and the fixing part (62) is fixed on the outer wall of the inner pipe (1).
8. A cryogenic vacuum pipe according to any one of claims 1 to 7, wherein: a vacuum valve (21) for acquiring a vacuum gap is arranged on the outer tube (2); the outer wall of the inner pipe (1) is coated with a radiation-resistant heat-insulating layer.
9. A cryogenic vacuum pipe according to any one of claims 1 to 7, wherein: the drift diameter of the inner tube (1) is DN 80-DN 500.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920921054.XU CN210196798U (en) | 2019-06-19 | 2019-06-19 | Low-temperature vacuum pipeline |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131527A (en) * | 2019-06-19 | 2019-08-16 | 成都科瑞尔低温设备有限公司 | A kind of cryogenic vacuum pipeline |
| CN112377725A (en) * | 2021-01-14 | 2021-02-19 | 上海兴邺材料科技有限公司 | Vacuum tube |
| WO2022152100A1 (en) * | 2021-01-14 | 2022-07-21 | 上海兴邺材料科技有限公司 | Vacuum pipe |
-
2019
- 2019-06-19 CN CN201920921054.XU patent/CN210196798U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131527A (en) * | 2019-06-19 | 2019-08-16 | 成都科瑞尔低温设备有限公司 | A kind of cryogenic vacuum pipeline |
| CN112377725A (en) * | 2021-01-14 | 2021-02-19 | 上海兴邺材料科技有限公司 | Vacuum tube |
| WO2022152100A1 (en) * | 2021-01-14 | 2022-07-21 | 上海兴邺材料科技有限公司 | Vacuum pipe |
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