Welded vacuum heat insulation pipeline

Abstract

The utility model discloses a welding type vacuum heat insulation pipeline which comprises an inner pipe and an outer pipe, a supporting frame is arranged between the inner pipe and the outer pipe, and the supporting frame comprises a first supporting ring, second supporting rings located on the two sides of the first supporting ring and a plurality of supporting bridges between the two second supporting rings. The supporting bridge is connected with the first supporting ring, the first supporting ring is arranged at the welding position of the inner pipe in a sleeving mode and makes contact with the outer surface of the inner pipe, the outer side face of the second supporting ring makes contact with the inner surface of the outer pipe, the heat conduction distance is greatly prolonged through the supporting frame, and therefore the heat leakage prevention effect of the welding position of the inner pipe is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat-insulating pipelines, and more specifically relates to a welded vacuum heat-insulating pipeline. Background Art

[0002] Pipelines for transporting cryogenic liquids such as liquid oxygen, liquid nitrogen, liquid argon, and liquefied natural gas are generally insulated pipes, that is, they basically isolate the heat exchange inside and outside the pipes. They generally include an inner pipe and an outer pipe. The outer surface of the inner pipe and the inner surface of the outer pipe are both affixed with an insulation layer to reduce radiation heat transfer. The interlayer gap between the inner and outer pipes is in a high vacuum state to reduce convection heat transfer. At the same time, a support frame is arranged in the interlayer gap between the inner and outer pipes. The support frame is also made of low thermal conductivity material to reduce solid heat transfer.

[0003] For long-distance transportation, multiple short pipes need to be connected to each other. Generally, there are three connection methods: welding, plug-in and flange connection. In welded pipelines, in order to increase the support at the welded pipe mouth, the same annular support frame as the middle pipe section is generally used at the weld or on both sides near the weld (such as Figure 5 As shown), the largest heat leakage point on the pipeline is generally the connection between the two pipe openings. Therefore, the support frame on the welded pipe opening generally uses a support frame that can extend the heat conduction distance, such as the support frame structure shown in the patent publication number CN218480277U or CN210196798U.

[0004] However, when the existing support frame is used at a welding point, the heat leakage prevention effect of the welding point is poorer than that of other non-welded pipeline sections. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a welded vacuum insulated pipeline, in which a support frame capable of greatly extending the heat conduction distance is arranged at the inner pipe welding point, so as to improve the anti-heat leakage effect of the welding point.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a welded vacuum insulated pipe, comprising an inner tube and an outer tube, a support frame is arranged between the inner tube and the outer tube, the support frame comprises a first support ring, second support rings located on both sides of the first support ring and a plurality of support bridges between the two second support rings, the support bridges are connected to the first support ring, the first support ring is sleeved at the welding position of the inner tube and contacts the outer surface of the inner tube, and the outer side surface of the second support ring contacts the inner surface of the outer tube.

[0007] Furthermore, the support bridge includes a first support rod and two second support rods, the two ends of the first support rod are respectively connected to two second support rings, one end of the second support rod is connected to the first support rod, and the other end is connected to the first support ring, and a triangular support structure is formed between the first support rod and the two second support rods, and a number of third support rods are arranged between the second support rod and the first support rod.

[0008] Furthermore, a plurality of supporting protrusions are provided on the inner side surface of the first supporting ring and the outer side surface of the second supporting ring.

[0009] Furthermore, a plurality of fixing brackets are disposed on one side of the first supporting ring and one side of the second supporting ring.

[0010] Furthermore, the support bridge is detachably connected to the second support ring.

[0011] Compared with the prior art, the beneficial effects of the utility model are: using a first support ring to contact the inner tube welding point, two second support rings on both sides, and a support bridge with a triangular stable structure in the middle for connection, so that the heat transfer path between the inner tube and the outer tube is greatly increased, and the heat conduction distance is greatly extended, thereby improving the anti-heat leakage effect of the inner tube welding point. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the welded vacuum insulation pipeline of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the support frame in the welded vacuum insulation pipeline of the utility model;

[0014] Figure 3 This is a front structural schematic diagram of a support frame in a welded vacuum insulation pipeline of the utility model;

[0015] Figure 4 for Figure 3 Sectional view along the AA direction;

[0016] Figure 5 The figure is a schematic diagram of the arrangement of the support frame at the welding position in the prior art.

[0017] Reference numerals: inner tube 1 ; outer tube 2 ; first support ring 3 ; second support ring 4 ; support bridge 5 ; first support rod 6 ; second support rod 7 ; third support rod 8 ; support protrusion 9 ; fixing bracket 10 ; support frame 11 . DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" and "a number" is two or more, unless otherwise clearly and specifically defined.

[0020] Reference Figures 1 to 5 The utility model is further described.

[0021] A welded vacuum insulated pipeline comprises an inner tube 1 and an outer tube 2, wherein a support frame 11 is arranged between the inner tube 1 and the outer tube 2, wherein the support frame 11 comprises a first support ring 3, second support rings 4 located on both sides of the first support ring 3, and a plurality of support bridges 5 between the two second support rings 4, wherein the support bridges 5 are connected to the first support ring 3, the first support ring 3 is sleeved at the welding position of the inner tube 1 and contacts the outer surface of the inner tube 1, and the outer side surface of the second support ring 4 contacts the inner surface of the outer tube 2.

[0022] The first support ring 3 , the second support ring 4 and the support bridge 5 are all made of materials that are resistant to low temperatures, have low thermal conductivity, high strength and are relatively light in weight.

[0023] like Figure 1 As shown, in the present embodiment, preferably, the support bridge 5 includes a first support rod 6 and two second support rods 7, the two ends of the first support rod 6 are respectively connected to two second support rings 4, one end of the second support rod 7 is connected to the first support rod 6, and the other end is connected to the first support ring 3, and a triangular support structure is formed between the first support rod 6 and the two second support rods 7, and a plurality of third support rods 8 are arranged between the second support rod 7 and the first support rod 6.

[0024] Preferably, in this embodiment, the third support rods 8 can be arranged in parallel with each other or the interior of the triangular support structure can be further divided into a plurality of small triangles.

[0025] like Figure 2As shown, in the present embodiment, preferably, a plurality of support protrusions 9 are provided on the inner side surface of the first support ring 3 and the outer side surface of the second support ring 4, and the support protrusions 9 are in contact with the inner tube 1 or the outer tube 2 to reduce the contact area with the inner tube 1 or the outer tube 2 and reduce the heat transfer.

[0026] The second structure of the second support ring 4 in this embodiment is that a plurality of support protrusions 9 are also arranged on the inner side surface of the second support ring 4, and the support protrusions 9 on the inner side surface and the outer side surface are arranged alternately, so that the second support ring 4 supports the inner tube 1 and the outer tube 2 at the same time.

[0027] like Figure 1 As shown, in this embodiment, preferably, a plurality of fixing brackets 10 are provided on one side of the first support ring 3 and one side of the second support ring 4, and the first support ring 3 or the second support ring 4 is made to be close to the inner tube 1 or the outer tube 2 through the fixing brackets 10.

[0028] Preferably in this embodiment, the support bridge 5 is detachably connected to the second support ring 4. Specifically, a plurality of sockets corresponding to the support bridge 5 may be provided on the side of the second support ring 4, and the connection is achieved after the ends of the support bridge 5 are inserted into the sockets.

[0029] like Figures 1 to 4 As shown, a first support ring 3 is used to contact the welding position of the inner tube 1, with two second support rings 4 on both sides, and a support bridge 5 with a triangular stable structure is used in the middle to connect them, so that the heat transfer path between the inner tube 1 and the outer tube 2 is greatly increased, and the heat conduction distance is greatly extended, thereby improving the anti-heat leakage effect of the welding position of the inner tube 1.

[0030] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A welded vacuum insulated pipeline, comprising an inner pipe and an outer pipe, characterized in that: A support frame is arranged between the inner tube and the outer tube, and the support frame includes a first support ring, second support rings located on both sides of the first support ring, and a plurality of support bridges between the two second support rings, the support bridges are connected to the first support ring, the first support ring is sleeved at the welding position of the inner tube and contacts the outer surface of the inner tube, and the outer side surface of the second support ring contacts the inner surface of the outer tube.

2. The welded vacuum insulated pipeline according to claim 1, characterized in that: The support bridge includes a first support rod and two second support rods, the two ends of the first support rod are respectively connected to two second support rings, one end of the second support rod is connected to the first support rod, and the other end is connected to the first support ring, and a triangular support structure is formed between the first support rod and the two second support rods, and a plurality of third support rods are arranged between the second support rod and the first support rod.

3. The welded vacuum insulated pipeline according to claim 2, characterized in that: A plurality of supporting protrusions are arranged on the inner side surface of the first supporting ring and the outer side surface of the second supporting ring.

4. The welded vacuum insulated pipeline according to claim 3, characterized in that: A plurality of fixing brackets are disposed on one side of the first supporting ring and one side of the second supporting ring.

5. The welded vacuum insulated pipeline according to claim 4, characterized in that: The supporting bridge is detachably connected to the second supporting ring.

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