CN220817010U - Aerogel insulated double wall pipe - Google Patents

Abstract

The utility model discloses an aerogel heat insulation double-wall pipe, which comprises an inner pipe and an outer pipe, wherein the outer pipe is sleeved outside the inner pipe, an inner pipe support and an outer pipe support are arranged between the inner pipe and the outer pipe, and a cavity is formed between the inner pipe and the outer pipe, and the aerogel heat insulation double-wall pipe is characterized in that: aerogel is coated on the outer side of the inner tube, inert gas is filled in the cavity, and a ventilation seat is arranged on the outer tube; the aerogel heat insulation double-wall pipe adopts the inner pipe to cover the aerogel to realize heat insulation, and the selected heat insulation mode is the aerogel, so that the defects of easy failure, difficult installation and difficult maintenance of the conventional vacuum double-wall pipe are effectively avoided.

Description

Aerogel insulated double wall pipe

Technical Field

The utility model relates to the technical field of heat-insulating double-wall pipes, in particular to an aerogel heat-insulating double-wall pipe.

Background

Ultra-low temperature pipelines (design temperature is-165 ℃) exist in a ship LNG host fuel storage and supply system. At present, a stainless steel pipe is wrapped with a heat-insulating material to convey a low-temperature medium aiming at the pipeline with the temperature grade. At present, a double-layer vacuum pipeline is generally adopted, heat insulation is realized by vacuumizing a cavity between the double-layer pipeline, and safe conveying of a low-temperature medium is realized; uncontrollable leakage can be avoided and the double-wall pipe cavity can be monitored; the area where the flammable liquid transport pipe of this type is located can then be defined as a safe area, and the associated electrical meters, equipment need not be explosion proof.

Although the earlier single wall tube package insulation of double layer vacuum lines is a significant improvement, this construction suffers from a number of problems. The installation difficulty of the double-layer vacuum tube is great, because each pipe needs to be welded on site to form an integral vacuum cavity, and the vacuum is pumped in the site environment, a plurality of uncontrollable factors exist, and the pumping time is as long as 1 month; in addition, the vacuum insulation effect can be slowly reduced along with the increase of the service time, the heat insulation performance is finally deteriorated, the corresponding heat insulation effect is achieved by supplementing vacuum, and the vacuum pumping operation is a work with higher technical content, and meanwhile, a special high vacuum pump is required to be equipped, so that the maintenance is difficult. At present, as the gas system is popularized, the application of ships using the gas is more and more widely, and the problems of the ultralow-temperature pipeline are more and more important.

Disclosure of utility model

Aiming at the defects of the prior art, the utility model provides an aerogel heat insulation double-wall pipe, which adopts an inner pipe to cover aerogel to realize heat insulation, and adopts the aerogel heat insulation mode, so that the defects of easy failure, difficult installation and difficult maintenance of the conventional vacuum double-wall pipe are effectively avoided.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The utility model provides an adiabatic double-walled pipe of aerogel, includes inner tube and outer tube, and outer tube cover is in the inner tube outside, is provided with inside and outside pipe support between inner tube and the outer tube to form the cavity, its characterized in that between inner tube and the outer tube: aerogel is coated on the outer side of the inner tube, inert gas is filled in the cavity, and a ventilation seat is arranged on the outer tube.

Further, a pressure detection joint and a safety blaster are arranged on the outer tube.

Furthermore, the inner pipe and the outer pipe are provided with a plurality of sections, the adjacent two sections of inner pipes are welded and fixed, and the half pipe is welded between the adjacent two sections of outer pipes.

Further, a corrugated expansion joint is arranged on the outer tube and/or the inner tube.

Further, the double-walled pipe is provided with an elbow in its length direction.

Furthermore, the outer tube is provided with a cabin penetrating piece, and the cabin penetrating piece is a flexible cabin penetrating piece or a fixed cabin penetrating piece.

Further, a sealing plate is welded between the end of the outer tube and the inner tube.

Further, the inner and outer tube supports are adiabatic sliding supports.

Further, the inert gas is nitrogen.

Further, the outer tube is a stainless steel tube.

Compared with the prior art, the utility model has the beneficial effects that:

The aerogel heat insulation double-wall pipe mainly comprises a continuous cavity formed by a continuous inner pipe, an outer pipe and sealing plates at two ends of a pipeline, wherein the inner pipe is coated with aerogel to realize heat insulation. The double-wall pipe in a sealing state can play a good role in protecting the medium in the inner pipe by pre-filling inert gas with the pressure higher than the design pressure of the inner pipe, the pressure detection joint can timely detect the leakage of the inner pipe, and the safety blaster can carry out necessary protection on the leakage of the low-temperature medium. The area where the combustible gas conveying pipeline in the form is located can be defined as a safety area, and related electric instruments and equipment do not need to be explosion-proof.

For the pipeline which is bent on site, an inner pipe elbow and an outer pipe elbow with equal radius are adopted, so that a certain gap is kept between the inner pipe and the outer pipe, and collision caused by different temperature expansion/contraction amounts of the inner pipe and the outer pipe is avoided.

The heat insulation sliding support can keep a certain gap between the inner tube and the outer tube, and can adapt to the relative displacement of the inner tube and the outer tube caused by different temperature expansion/contraction amounts; and the heat transfer can be reduced by selecting the heat insulating material.

In addition, the pipeline needs to pass through the bulkhead, and a cabin penetrating piece is sleeved on the outer pipe of the double-wall pipe, so that the safety and reliability of the double-wall pipe at the cabin penetrating position are ensured.

The aerogel heat-insulating double-wall pipe is a fuel pipeline in a fuel storage and supply system of the ship LNG host, and the adopted heat insulation mode is aerogel, so that the defects of easy failure, difficult installation and difficult maintenance of the conventional vacuum double-wall pipe are effectively overcome; in addition, because of high reliability, the requirement on the electric equipment in the same space is greatly reduced, and the arrangement of corresponding pipelines is facilitated to a certain extent. Meanwhile, the outer tube is a stainless steel tube, so that subsequent maintenance is avoided, the consumption of energy and manpower is reduced, and the effects of cleanness, high efficiency and cost reduction are achieved.

Drawings

For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

FIG. 1 is a schematic view of the overall structure of an aerogel insulated double wall pipe;

FIG. 2 is a schematic view of the structure of the inner tube with a bellows expansion joint;

Fig. 3 is a schematic structural view of the cabin penetrating member when the cabin penetrating member is a fixed cabin penetrating member.

Marked in the figure as: 1. an inner tube; 2. an outer tube; 3. an inner pipe and an outer pipe are supported; 4. a bellows expansion joint; 5. a half pipe; 61. a flexible cabin penetrating member; 62. fixing the cabin penetrating piece; 7. an inner tube elbow; 8. an outer tube elbow; 9. a sealing plate; 10. a ventilation seat; 11. a pressure detection joint; 12. an aerogel; 13. a safety blaster.

Detailed Description

In the description of the present utility model, it should be noted that, for the azimuth words such as the terms "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, only for convenience of describing the present utility model and simplifying the description, but do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and should not be construed as limiting the specific protection scope of the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first", "a second" feature may explicitly or implicitly include one or more of such feature, and in the description of the present utility model, the meaning of "a number", "a number" is two or more, unless otherwise specifically defined.

The utility model provides an adiabatic double-walled pipe of aerogel 12, includes inner tube 1 and outer tube 2, and outer tube 2 cover is in the inner tube 1 outside, is provided with inside and outside pipe support 3 between inner tube 1 and the outer tube 2 to form the cavity between inner tube 1 and the outer tube 2, the cladding of inner tube 1 outside has aerogel 12, the cavity is interior to dash there is inert gas, be provided with the seat 10 of taking a breath on the outer tube 2.

In this embodiment, preferably, the outer tube 2 is provided with a pressure detection joint 11 and a safety exploder 13.

In this embodiment, preferably, the inner tube 1 and the outer tube 2 are both provided with a plurality of sections, the two adjacent sections of the inner tube 1 are welded and fixed, and the half tube 5 is welded between the two adjacent sections of the outer tube 2.

In this embodiment, preferably, the outer tube 2 and/or the inner tube 1 are provided with bellows expansion joints 4.

In this embodiment, the double-walled pipe is preferably provided with bends in its length direction.

In this embodiment, preferably, the outer tube 2 is provided with a cabin penetrating member, and the cabin penetrating member is a flexible cabin penetrating member 61 or a fixed cabin penetrating member 62.

In this embodiment, preferably, a sealing plate 9 is welded between the end of the outer tube 2 and the inner tube 1.

In this embodiment, the inner and outer tube supports 3 are preferably heat-insulating sliding supports.

In this embodiment, preferably, the inert gas is nitrogen.

In this embodiment, preferably, the outer tube 2 is a stainless steel tube.

Working principle and advantages:

The aerogel 12 heat insulation double-wall pipe mainly comprises a continuous cavity formed by a continuous inner pipe 1, an outer pipe 2 and sealing plates 9 at two ends of a pipeline, wherein the inner pipe 1 is coated with the aerogel 12 to realize heat insulation. The double-wall pipe in a sealing state can play a good role in protecting the medium in the inner pipe 1 by pre-filling inert gas with the pressure higher than the design pressure of the inner pipe 1, the pressure detection joint 11 can timely detect the leakage of the inner pipe 1, and the safety blaster 13 can protect the leakage of the low-temperature medium. The area where the combustible gas conveying pipeline in the form is located can be defined as a safety area, and related electric instruments and equipment do not need to be explosion-proof.

For the on-site bent pipeline, an inner pipe elbow 7 and an outer pipe elbow 8 with equal radiuses are adopted, so that a certain gap is kept between the inner pipe and the outer pipe 2, and collision caused by different temperature expansion/contraction amounts of the inner pipe and the outer pipe 2 is avoided.

The heat insulation sliding support can keep a certain gap between the inner pipe and the outer pipe 2, and can adapt to the relative displacement of the inner pipe and the outer pipe 2 caused by different temperature expansion/contraction amounts; and the heat transfer can be reduced by selecting the heat insulating material.

In addition, the pipeline needs to pass through the bulkhead, and a cabin penetrating piece is sleeved on the double-wall pipe outer pipe 2, so that the safety and reliability of the double-wall pipe at the cabin penetrating position are ensured.

The aerogel 12 heat-insulating double-wall pipe is a fuel pipeline in a fuel storage and supply system of a ship LNG host, and the heat insulation mode selected is aerogel 12, so that the defects of easy failure, difficult installation and difficult maintenance of the conventional vacuum double-wall pipe are effectively avoided; in addition, because of high reliability, the requirement on the electric equipment in the same space is greatly reduced, and the arrangement of corresponding pipelines is facilitated to a certain extent. Meanwhile, the outer tube 2 is a stainless steel tube, so that subsequent maintenance is avoided, the consumption of energy and manpower is reduced, and the effects of cleanness, high efficiency and cost reduction are achieved.

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (10)

1. An aerogel insulated double wall pipe, characterized by: including inner tube and outer tube, the outer tube cover is in the inner tube outside, is provided with inside and outside pipe support between inner tube and the outer tube to form the cavity, its characterized in that between inner tube and the outer tube: aerogel is coated on the outer side of the inner tube, inert gas is filled in the cavity, and a ventilation seat is arranged on the outer tube.

2. The aerogel insulated double wall pipe of claim 1, wherein: the outer tube is provided with a pressure detection joint and a safety blaster.

3. The aerogel insulated double wall pipe of claim 1, wherein: the inner pipe and the outer pipe are provided with a plurality of sections, the adjacent two sections of inner pipes are welded and fixed, and the half pipe is welded between the adjacent two sections of outer pipes.

4. The aerogel insulated double wall pipe of claim 1, wherein: and the outer pipe and/or the inner pipe are/is provided with a corrugated expansion joint.

5. The aerogel insulated double wall pipe of claim 1, wherein: the double-walled pipe is provided with an elbow in its length direction.

6. The aerogel insulated double wall pipe of claim 1, wherein: the outer tube is provided with a cabin penetrating piece, and the cabin penetrating piece is a flexible cabin penetrating piece or a fixed cabin penetrating piece.

7. The aerogel insulated double wall pipe of claim 1, wherein: a sealing plate is welded between the end of the outer tube and the inner tube.

8. The aerogel insulated double wall pipe of claim 1, wherein: the inner pipe support and the outer pipe support are heat-insulating sliding supports.

9. The aerogel insulated double wall pipe of claim 1, wherein: the inert gas is nitrogen.

10. The aerogel insulated double wall pipe of claim 1, wherein: the outer tube is a stainless steel tube.