Low-temperature liquid vacuum heat insulation pipeline connecting structure

Abstract

The utility model discloses a low-temperature liquid vacuum heat insulation pipeline connecting structure which comprises a first conveying inner pipe and a second conveying inner pipe, and positioning insertion holes are annularly formed in the outer wall of the same side of the first conveying inner pipe and the outer wall of the same side of the second conveying inner pipe at equal intervals. Positioning insertion blocks are annularly welded to the outer walls of the same sides of the first conveying inner pipe and the second conveying inner pipe at equal intervals, protective outer pipes are arranged on the outer walls of the middles of the first conveying inner pipe and the second conveying inner pipe, and cold bridges are arranged at the two ends of each protective outer pipe; the positioning insertion holes and the positioning insertion blocks are formed in the ends of the two sides of the conveying inner pipe and matched with each other, so that in the field actual assembling and using process, pipeline splicing treatment can be rapidly assisted, the axes of the conveying inner pipe can be located on the same straight line, the welding workload of joints is reduced, and the production efficiency is improved. And a positioning clamping pipe with a sealing ring is further arranged at the joint of the inner pipe for internal protective sealing, so that leakage and volatilization of low-temperature liquid are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline conveying technical field especially relates to a low temperature liquid vacuum heat insulation pipeline connecting structure. BACKGROUND

[0002] Vacuum heat insulation pipeline is used more and more in low temperature liquid application engineering system, and the requirement for pipeline caliber is more and more big, and the length of pipeline is more and more long.But the heat insulation performance of vacuum heat insulation pipeline usually cannot satisfy the use requirement, and a large amount of condensation or frost is formed at the connecting place of vacuum heat insulation pipeline, and a large amount of low temperature liquid in the inner pipeline is vaporized, and the liquid outlet of vacuum heat insulation pipeline is the gas-liquid two-phase, and even all is gaseous, which cannot satisfy the use requirement, and also causes the waste of low temperature liquid emptying.

[0003] The core problem is that vacuum heat insulation pipeline cannot be integrally manufactured and transported to the scene for use, and can only be segmented designed and manufactured and then used after being spliced and installed on the scene.Vacuum heat insulation pipeline is the typical double-layer structure with heat insulation layer like low temperature container, and the connecting structure of adjacent parts after segmented manufacturing needs to satisfy the connecting requirement of inner pipe, also needs to satisfy the connecting requirement of heat insulation layer structure, and further needs to consider the structure requirement of forming the vacuum section of two adjacent pipeline part connecting areas and the self-generating independent vacuum interval of segmented pipeline parts.Due to the imperfect of complex structure design, the heat bridge is too short or the safety relief system is incomplete, which is the cause of poor performance of vacuum heat insulation pipeline. CONTENT OF UTILITY MODEL

[0004] The utility model discloses a low temperature liquid vacuum heat insulation pipeline connecting structure to solve the shortcomings in the prior art.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a low temperature liquid vacuum heat insulation pipeline connecting structure, including first conveying inner tube and second conveying inner tube, the same side outer wall of first conveying inner tube and second conveying inner tube is all ring equidistance and is provided with the positioning socket, and the same side outer wall of first conveying inner tube and second conveying inner tube is all ring equidistance and is welded with the positioning plug, the middle outer wall of first conveying inner tube and second conveying inner tube is all provided with the protective outer tube, and the both ends of protective outer tube are provided with cold bridge, the outer wall of protective outer tube is welded with the equidistance distribution's limit stopper, and the top outer wall of protective outer tube is welded with first vacuum gauge pipe, one side of first vacuum gauge pipe is provided with first vacuumizing pipe, and first vacuum gauge pipe is communicated with first connecting pipe between first vacuumizing pipe, the joint of first conveying inner tube and second conveying inner tube is welded, and the outer wall of first conveying inner tube and second conveying inner tube junction is provided with mutually screwed first outer sleeve pipe and second outer sleeve pipe, the top outer wall of second outer sleeve pipe is communicated with second vacuum gauge pipe and second vacuumizing pipe respectively, and second vacuum gauge pipe is communicated with second connecting pipe between second vacuumizing pipe.

[0007] As a further scheme of the utility model: the same side inner wall of first conveying inner tube and second conveying inner tube is welded with positioning clamp pipe, and the both end inner walls of positioning clamp pipe are provided with arc chamfer.

[0008] As a further scheme of the utility model: the outer wall size of positioning clamp pipe is mutually adapted with first conveying inner tube and second conveying inner tube.

[0009] As a further scheme of the utility model: the inner wall of first connecting pipe is provided with first check valve, and the inner wall of first vacuumizing pipe is provided with second check valve.

[0010] As a further scheme of the utility model: the gas flow direction of first check valve inner wall is from first vacuum gauge pipe to first connecting pipe, and the gas flow direction of second check valve inner wall is from first vacuumizing pipe to outside.

[0011] As a further scheme of the utility model: the inner wall of second connecting pipe is provided with third check valve, and the inner wall of second vacuumizing pipe is provided with fourth check valve.

[0012] As a further scheme of the utility model: the gas flow direction of third check valve inner wall is from second vacuum gauge pipe to second connecting pipe, and the gas flow direction of fourth check valve inner wall is from second vacuumizing pipe to outside.

[0013] As a further scheme of the utility model: the inner wall of first outer sleeve pipe and second outer sleeve pipe is provided with heat insulation layer board, and the inner wall of heat insulation layer board is provided with heat preservation inner bag.

[0014] Compared with the prior art, the low-temperature liquid vacuum heat insulation pipeline connecting structure has the following beneficial effects:

[0015] 1. The vacuum heat insulation pipeline connecting structure of the design can quickly assist in pipeline splicing processing during actual on-site assembly and use, can make the axis of the conveying inner pipe located on the same straight line, reduce the workload of welding at the joint, and the inner pipe connecting part is also provided with a positioning pipe clamp with a sealing ring for internal protection and sealing, thereby reducing the leakage and volatilization of the low-temperature liquid.

[0016] 2. The vacuum heat insulation pipeline connecting structure of the design, in the conveying process of the low-temperature liquid pipeline, a protective outer pipe is arranged in the middle of the pipeline, an external air extraction device is used to extract air from the gap to form a vacuum environment, thereby forming a vacuum heat insulation area, and an outer clamping pipe is arranged at the pipeline joint and subjected to vacuum extraction treatment, so that the medium outside the long-distance conveying can form a vacuum heat insulation area, and the joint is also provided with double-layer heat insulation protection measures, thereby further insulating heat and achieving good protection measures.

[0017] The parts not involved in the device are the same as or can be realized by the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The overall structure schematic diagram of the low-temperature liquid vacuum heat insulation pipeline connecting structure is provided.

[0019] Figure 2 The overall structure side view of the low-temperature liquid vacuum heat insulation pipeline connecting structure is provided.

[0020] Figure 3 The first perspective view structure schematic diagram of the low-temperature liquid vacuum heat insulation pipeline connecting structure is provided.

[0021] Figure 4 The internal structure sectional view of the low-temperature liquid vacuum heat insulation pipeline connecting structure is provided.

[0022] In the figure: 1, the first conveying inner tube; 2, the second conveying inner tube; 3, the positioning socket; 4, the positioning clamp pipe; 5, the positioning plug; 6, the protective outer tube; 7, the cold bridge; 8, the limiting stopper; 9, the first vacuum gauge pipe; 10, the first connecting pipe; 11, the first vacuumizing pipe; 12, the first one-way valve; 13, the second one-way valve; 14, the first outer clamp sleeve pipe; 15, the second outer clamp sleeve pipe; 16, the second vacuum gauge pipe; 17, the second connecting pipe; 18, the second vacuumizing pipe; 19, the third one-way valve; 20, the fourth one-way valve; 21, the heat insulation layer plate; 22, the heat preservation inner container. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0024] Embodiment 1:

[0025] A low-temperature liquid vacuum heat insulation pipeline connecting structure, as shown in the embodiment, Figures 1-4 including a first conveying inner tube 1 and a second conveying inner tube 2, the same side outer wall of the first conveying inner tube 1 and the second conveying inner tube 2 is annularly and equidistantly provided with a positioning socket 3, and the same side outer wall of the first conveying inner tube 1 and the second conveying inner tube 2 is annularly and equidistantly welded with a positioning plug 5, the middle outer wall of the first conveying inner tube 1 and the second conveying inner tube 2 is provided with a protective outer tube 6, and the two ends of the protective outer tube 6 are provided with a cold bridge 7, the outer wall of the protective outer tube 6 is welded with equidistantly distributed limiting stoppers 8, and the top outer wall of the protective outer tube 6 is welded with a first vacuum gauge pipe 9, one side of the first vacuum gauge pipe 9 is provided with a first vacuumizing pipe 11, and the first vacuum gauge pipe 9 and the first vacuumizing pipe 11 are communicated with a first connecting pipe 10, the joint of the first conveying inner tube 1 and the second conveying inner tube 2 is welded, and the outer wall of the joint of the first conveying inner tube 1 and the second conveying inner tube 2 is provided with a first outer clamp sleeve pipe 14 and a second outer clamp sleeve pipe 15 which are mutually screwed, the top outer wall of the second outer clamp sleeve pipe 15 is respectively communicated with a second vacuum gauge pipe 16 and a second vacuumizing pipe 18, and the second vacuum gauge pipe 16 and the second vacuumizing pipe 18 are communicated with a second connecting pipe 17;

[0026] By means of the positioning socket 3 and the positioning plug 5 which are provided on the two side ends of the conveying inner tube and cooperate with each other, the pipeline splicing process can be quickly assisted in the actual on-site assembly process, the axis of the conveying inner tube can be located on the same straight line, the workload of welding at the joint is reduced, and the positioning clamp pipe 4 with a sealing ring is further provided at the inner tube joint for internal protection and sealing, so that the leakage and volatilization of the low-temperature liquid are reduced.

[0027] The same side inner wall of the first conveying inner tube 1 and the second conveying inner tube 2 is welded with a positioning clamping pipe 4, and the inner wall of both ends of the positioning clamping pipe 4 is provided with an arc chamfer, the outer wall size of the positioning clamping pipe 4 is matched with the first conveying inner tube 1 and the second conveying inner tube 2, the outer wall of the end of the positioning clamping pipe 4 is provided with a ring-shaped sealing groove, and the inner wall of the ring-shaped sealing groove is sleeved with a ring-shaped sealing ring;

[0028] The inner wall of the first connecting pipe 10 is provided with a first one-way valve 12, and the inner wall of the first vacuum pipe 11 is provided with a second one-way valve 13.

[0029] The gas flow direction of the inner wall of the first one-way valve 12 is from the first vacuum gauge pipe 9 to the first connecting pipe 10, and the gas flow direction of the inner wall of the second one-way valve 13 is from the first vacuum pipe 11 to the outside;

[0030] In the process of conveying the low-temperature liquid pipeline, the protective outer pipe 6 is arranged in the middle of the pipeline, the gap is pumped by the external air extraction device to form a vacuum environment, thereby forming a vacuum heat insulation area, and the outer clamping pipe is arranged at the joint of the pipeline and is subjected to vacuum treatment, so that the medium outside the long-distance conveying pipeline forms a vacuum heat insulation area, and the joint is also provided with double-layer heat insulation protection measures, thereby further insulating heat and achieving good protection measures.

[0031] In use, the first conveying inner tube 1 and the second conveying inner tube 2 provided with the protective outer pipe 6 and the cold bridge 7 are first moved to the site where they are needed, then the ground is fixed with mounting supports, after which the first conveying inner tube 1 is placed on the mounting supports and the first outer clamping pipe 14 is inserted into the end, one end of the second conveying inner tube 2 welded with the positioning plug 5 is aligned with the first conveying inner tube 1 provided with the positioning insertion hole 3, the second outer clamping pipe 15 is inserted into the end of the second conveying inner tube 2, then the positioning plug 5 is inserted and fixed in the positioning insertion hole 3, and the positioning clamping pipe 4 is inserted into the inner wall of the second conveying inner tube 2, thereby reducing the leakage of the medium at the joint, after the insertion of the joint is completed, the joint is welded and sealed by using the external welding equipment, after the sealing and welding are completed, the first outer clamping pipe 14 and the second outer clamping pipe 15 are subjected to screwing treatment, the end is welded and sealed after screwing, the vacuum area is formed by sequentially connecting the first vacuum pipe 11 and the second vacuum pipe 18 by using the external air extraction device and performing vacuum treatment on the gap, thereby achieving good protection treatment, and the one-way valve can avoid the backflow of external air, prolong the duration of the vacuum area, and achieve better protection effect.

[0032] Embodiment 2:

[0033] A low-temperature liquid vacuum heat insulation pipeline connecting structure, as shown in Figures 1-4As shown, the second connecting pipe 17 is provided with a third one-way valve 19 on the inner wall, and the second vacuum pipe 18 is provided with a fourth one-way valve 20 on the inner wall, the gas flow direction of the third one-way valve 19 is from the second vacuum gauge pipe 16 to the second connecting pipe 17, and the gas flow direction of the fourth one-way valve 20 is from the second vacuum pipe 18 to the outside;

[0034] In use, the inner wall of the first outer jacket pipe 14 and the second outer jacket pipe 15 is bonded with a heat insulation layer plate 21, and the inner wall of the heat insulation layer plate 21 is bonded with a heat preservation inner container 22

[0035] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A cryogenic liquid vacuum insulation pipe connection structure, comprising a first inner delivery pipe (1) and a second inner delivery pipe (2), characterized in that: The outer walls of the same side of the first conveying inner tube (1) and the second conveying inner tube (2) are both provided with positioning holes (3) in an annular shape and at equal distances, and the outer walls of the same side of the first conveying inner tube (1) and the second conveying inner tube (2) are both welded with positioning plugs (5) in an annular shape and at equal distances, the middle outer walls of the first conveying inner tube (1) and the second conveying inner tube (2) are both provided with protective outer tubes (6), and both ends of the protective outer tubes (6) are provided with cold bridges (7), the outer walls of the protective outer tubes (6) are welded with limit blocks (8) distributed at equal distances, and the top outer wall of the protective outer tube (6) is welded with a first vacuum gauge (9), and the first vacuum gauge (9) is welded with a first vacuum gauge (9). A first vacuum pumping tube (11) is provided on one side, and a first connecting tube (10) is connected between the first vacuum gauge (9) and the first vacuum pumping tube (11); the first conveying inner tube (1) and the second conveying inner tube (2) are welded at the joint, and a first outer jacket tube (14) and a second outer jacket tube (15) that are screwed together are provided on the outer wall of the joint between the first conveying inner tube (1) and the second conveying inner tube (2); the top outer wall of the second outer jacket tube (15) is respectively connected with a second vacuum gauge (16) and a second vacuum pumping tube (18), and a second connecting tube (17) is connected between the second vacuum gauge (16) and the second vacuum pumping tube (18).

2. A cryogenic liquid vacuum insulation pipe connection structure according to claim 1, characterized in that: A positioning clamping tube (4) is welded to the inner walls of the same side of the first conveying inner tube (1) and the second conveying inner tube (2), and the inner walls of both ends of the positioning clamping tube (4) are provided with arc chamfers. The outer wall size of the positioning clamping tube (4) is mutually compatible with the first conveying inner tube (1) and the second conveying inner tube (2).

3. A cryogenic liquid vacuum insulation pipe connection structure according to claim 2, characterized in that: An annular sealing groove is formed on the outer wall of the end portion of the positioning clamping tube (4), and an annular sealing ring is sleeved on the inner wall of the annular sealing groove.

4. The cryogenic liquid vacuum insulation pipe connection structure according to claim 1, characterized in that: A first one-way valve (12) is mounted on the inner wall of the first connecting pipe (10), and a second one-way valve (13) is mounted on the inner wall of the first vacuum pumping pipe (11).

5. The cryogenic liquid vacuum insulation pipe connection structure according to claim 4, characterized in that: The gas on the inner wall of the first one-way valve (12) flows from the first vacuum gauge (9) to the first connecting pipe (10), and the gas on the inner wall of the second one-way valve (13) flows from the first vacuum pipe (11) to the outside.

6. The cryogenic liquid vacuum insulation pipe connection structure according to claim 1, characterized in that: A third one-way valve (19) is mounted on the inner wall of the second connecting pipe (17), and a fourth one-way valve (20) is mounted on the inner wall of the second vacuum pumping pipe (18).

7. The cryogenic liquid vacuum insulation pipe connection structure according to claim 6, characterized in that: The gas on the inner wall of the third one-way valve (19) flows from the second vacuum gauge (16) to the second connecting pipe (17), and the gas on the inner wall of the fourth one-way valve (20) flows from the second vacuum pipe (18) to the outside.

8. The cryogenic liquid vacuum insulation pipe connection structure according to claim 1, characterized in that: The inner walls of the first outer jacket tube (14) and the second outer jacket tube (15) are both bonded with a heat insulation layer plate (21), and the inner wall of the heat insulation layer plate (21) is bonded and fixed with a heat preservation liner (22).

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