Fixed type supporting mechanism for inner pipe of vacuum heat insulation double-wall pipe

Abstract

The utility model relates to the field of vacuum heat insulation double-wall pipes, and discloses a vacuum heat insulation double-wall pipe inner pipe fixing type supporting mechanism which comprises an outer pipe, a flange plate is fixedly connected to the end point of the outer pipe, a fixing plate is arranged on the inner wall of the flange plate, an inner pipe is connected to the outer side of the fixing plate in an inserted mode, and a supporting mechanism is arranged on the outer side of the inner pipe. The supporting mechanism comprises a supporting assembly and a transmission assembly, and the supporting assembly comprises a shell. According to the utility model, through the cooperative use of the supporting mechanism, the outer pipe and the inner pipe, when the inner pipe is supported, the operating shaft is rotated to enable the tooth groove and the tooth to be meshed to drive the rotating piece to rotate, so that the moving block is driven to move towards the outer side of the shell through the guide groove, and the rubber pad extrudes the outer pipe to fix the inner pipe; the stability of the inner pipe is improved, the length of the device is increased, the leakage risk is reduced, meanwhile, when the inner pipe needs to be replaced and maintained, limiting can be relieved through reverse operation, and the maintenance efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vacuum heat insulation double -walled pipe field especially relates to a vacuum heat insulation double -walled pipe inner tube fixed type supporting mechanism. BACKGROUND

[0002] In the current ship LNG main engine fuel storage and supply system and other fields, the application of ultra-low temperature pipeline (design temperature can reach -165 DEG C) is more extensive, for the pipeline of such temperature grade, commonly adopts double -walled pipe.

[0003] Double -walled pipe is usually composed of inner tube and outer tube, and there is annular cavity between the inner tube and the outer tube, and the annular cavity is vacuumized to realize the heat insulation effect, and the inner tube and the outer tube rely on the inner heat insulation support to isolate heat transfer.

[0004] In practical application, the traditional support structure is directly fixed at the end position of each double -walled pipe, because the distance between the inner tube and the outer tube is limited, so it is impossible to set the support at the middle and inner position of the double -walled pipe, and this limitation limits the length of the single double -walled pipe, and in the long-distance transportation scene, more double -walled pipes need to be spliced and used, which increases the leakage risk, and the support structure is fixedly connected, and the inner tube is inconvenient to replace and maintain, therefore, the vacuum heat insulation double -walled pipe inner tube fixed type supporting mechanism is provided to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a vacuum heat insulation double -walled pipe inner tube fixed type supporting mechanism, which aims at solving the problem of "traditional support structure at the end of double -walled pipe, increased leakage risk when spliced and used" in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a vacuum heat insulation double -walled pipe inner tube fixed type supporting mechanism, including outer tube, the outer tube end point is fixedly connected with flange plate, the inner wall of flange plate is provided with fixed disc, the outer side of fixed disc is inserted with inner tube, the outer side of inner tube is provided with supporting mechanism, the supporting mechanism includes support assembly and transmission assembly, the support assembly includes shell, the shell is slidingly connected on the outer side of inner tube, the inner wall of shell is rotatably connected with rotating part, the outer side of rotating part is provided with guide groove, the inner wall of rotating part is provided with moving block, the moving block slides in the inner wall of guide groove, the outer side of shell is provided with sliding slot, the outer side of moving block slides in the inner wall of sliding slot.

[0007] Further description of the above technical scheme:

[0008] The transmission assembly comprises an operating shaft, the operating shaft is rotationally connected to the inner wall of the fixed disc, the outer side of the operating shaft penetrates through and is rotationally connected to the inner wall of the shell, the guide groove is provided with a tooth groove on the inner side close to the shell, and the rotating part is provided with a tooth on the outer side.

[0009] As a further description of the above technical solution:

[0010] The outer side of the moving block is fixedly connected with a rubber pad, the inner wall of the fixed disc is fixedly connected with a sealing ring, and the sealing ring is attached to the outer side of the operating shaft.

[0011] As a further description of the above technical solution:

[0012] The guide groove is provided with a plurality of groups, and the plurality of groups of guide grooves are provided in an inclined arc shape.

[0013] As a further description of the above technical solution:

[0014] The sliding groove is provided with a plurality of groups, and the plurality of groups of sliding grooves are perpendicular to the center of the shell.

[0015] As a further description of the above technical solution:

[0016] The outer side of the moving block is provided with a columnar structure, and the front side of the operating shaft is provided with a regular hexagonal groove.

[0017] As a further description of the above technical solution:

[0018] The inner wall of the fixed disc is provided with a limiting assembly, the limiting assembly comprises a limiting piece, the limiting piece is slidingly connected to the inner wall of the fixed disc, the limiting piece and the fixed disc are elastically connected through a compression spring, and the operating shaft is provided with a insertion hole close to the limiting piece.

[0019] As a further description of the above technical solution:

[0020] The front side of the limiting piece is provided with a spherical protrusion, the spherical protrusion of the limiting piece slides in the inner wall of the insertion hole, and the inner side of the insertion hole is provided as a circular arc surface.

[0021] The utility model has the advantages of:

[0022] 1、The utility model discloses a supporting mechanism, outer tube and inner tube are used in cooperation, when supporting the inner tube, the gear groove is meshed with the tooth to drive the rotating part to rotate by rotating the operating shaft, so that the moving block is driven to move to the outer side of the shell through the guide groove, the rubber pad extrusion outer tube fixes the inner tube, improves the stability of the inner tube and the length of the device, reduces the risk of leakage, and when the inner tube needs to be replaced and maintained, reverse operation can release the limit, improve the maintenance efficiency.

[0023] 2. The utility model discloses a supporting mechanism, which comprises an outer tube, a flange plate, a fixed disc, an inner tube, a limiting component and a compression spring. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the three-dimensional structure schematic diagram of the whole device in the utility model;

[0025] Figure 2 It is the three-dimensional structure schematic diagram of the outer tube and the inner tube in the utility model;

[0026] Figure 3 It is the overhead three-dimensional structure section view schematic diagram of the flange plate and the fixed disc in the utility model;

[0027] Figure 4 It is the three-dimensional structure schematic diagram of the limiting component and the compression spring in the utility model;

[0028] Figure 5 It is the split three-dimensional structure schematic diagram of the supporting mechanism in the utility model.

[0029] LEGEND:

[0030] 1, outer tube;2, flange plate;3, fixed disc;4, inner tube;51, operating shaft;52, guide groove;53, tooth slot;54, shell;55, rotating part;56, tooth;57, sliding slot;58, moving block;6, rubber pad;71, limiting component;72, compression spring;73, jack;8, sealing ring. DETAILED DESCRIPTION

[0031] 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. Based on the embodiments of the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0032] REFERENCE Figure 1 - Figure 3The utility model provides a kind of embodiment: a vacuum heat insulation double-wall pipe inner tube fixed type supporting mechanism, including outer tube 1, as the outer layer protection pipe of entire double-wall pipe structure, with inner tube 4 jointly form annular cavity of vacuum heat insulation, outer tube 1 endpoint is fixedly connected with flange plate 2, for other pipeline connection, flange plate 2 inner wall is provided with fixed disc 3, flange plate 2 is fixed with fixed disc 3 by bolt, improve the stability of connection, it is convenient to dismantle maintenance simultaneously, fixed disc 3 outside is inserted with inner tube 4, for conveying ultralow temperature medium, such as conveying LNG in ship LNG main engine fuel storage and supply system, inner tube 4 outside is provided with supporting mechanism, and supporting mechanism includes support assembly and transmission assembly, support assembly is provided with multiple groups, and multiple groups of support assembly are evenly distributed on the outside of inner tube 4, for improving the stability of inner tube 4, to be able to increase the length of double-wall pipe, reduce the use number of double-wall pipe, reduce the risk of leakage, support assembly includes shell 54, for supporting rotator 55 and moving block 58, shell 54 is slidingly connected on the outside of inner tube 4, rotator 55 is rotatably connected on the inner wall of shell 54, when rotating, moving block 58 is slid in sliding slot 57 by guide groove 52, to realize moving block 58 moving to the outside or inside of shell 54, to adjust the supporting intensity and position to double-wall pipe inner tube 4.

[0033] Referring to Figure 2 , Figure 3 and Figure 5 , guide groove 52 is provided on the outside of rotator 55, and guide groove 52 is provided with multiple groups, and multiple groups of guide groove 52 are provided in the form of inclined circular arc, to provide moving track for moving block 58, and multiple groups of inclined circular arc guide grooves 52 enable moving block 58 to slide in sliding slot 57 along curved track when rotator 55 rotates, to realize the movement of outward expansion or inward contraction, and the support is released by contraction, to facilitate dismounting, maintenance and replacement of inner tube 4, moving block 58 is provided on the inner wall of rotator 55, and columnar structure is provided on the outside of moving block 58, when moving block 58 moves outward, rubber pad 6 is extruded to press outer tube 1, to support and fix inner tube 4, and the design of columnar structure facilitates stable sliding in sliding slot 57 and guide groove 52, moving block 58 slides on the inner wall of guide groove 52, and sliding slot 57 is provided on the outside of shell 54, to guide the movement direction of moving block 58, and sliding slot 57 is provided with multiple groups, and multiple groups of sliding slot 57 are perpendicular to the center of shell 54, to ensure that moving block 58 can stably move to the outside or inside of shell 54 along radial direction, and moving block 58 slides on the inner wall of sliding slot 57.

[0034] Referring to Figure 3 and Figure 5The transmission assembly comprises an operation shaft 51, by rotating the operation shaft 51, the tooth groove 53 and the tooth 56 engaged with the operation shaft 51 are driven to move, thereby driving the rotating part 55 to rotate, the operation shaft 51 is rotatably connected to the inner wall of the fixed disc 3, the outer side of the operation shaft 51 penetrates and is rotatably connected to the inner wall of the shell 54, the guide groove 52 is provided with the tooth groove 53 close to the inside of the shell 54, the rotating part 55 is provided with the tooth 56 on the outer side, the tooth 56 is engaged in the inner side of the tooth groove 53, the tooth 56 and the tooth groove 53 are engaged with each other, under the drive of the operation shaft 51, the rotating part 55 is driven to rotate, thereby realizing the movement of the moving block 58.

[0035] Further, the moving block 58 is fixedly connected with the rubber pad 6 on the outer side, which is in contact with the inner wall of the outer pipe 1, so as to increase the friction and buffer, avoid damage to the inner pipe 4 and the outer pipe 1, and better support and fix the inner pipe 4 when extruding the outer pipe 1, prevent the inner pipe 4 from shaking, the inner wall of the fixed disc 3 is fixedly connected with the sealing ring 8, which plays a sealing role, prevents external air, moisture and other impurities from entering the annular cavity of the vacuum heat insulation double-wall pipe, affects the vacuum heat insulation effect, ensures the performance stability of the double-wall pipe, the sealing ring 8 is attached to the outer side of the operation shaft 51, and the operation shaft 51 is provided with a regular hexagonal groove on the front side, so as to facilitate the operator to rotate the operation shaft 51 by using a wrench.

[0036] Referring to Figure 2 Figure 4 The inner wall of the fixed disc 3 is provided with a limiting assembly, the limiting assembly comprises a limiting piece 71, the limiting piece 71 is slidably connected to the inner wall of the fixed disc 3, the spherical protrusion on the front side is matched with the insertion hole 73 on the operation shaft 51, when the operation shaft 51 rotates, the spherical protrusion slides in the insertion hole 73, when the operation shaft 51 rotates, the insertion hole 73 is extruded and separated from the limiting piece 71, after the operation is completed, the limiting piece 71 is reset and inserted into the corresponding insertion hole 73 under the action of the compression spring 72, preventing the operation shaft 51 from rotating, ensuring the stability of the support of the inner pipe 4, the limiting piece 71 and the fixed disc 3 are elastically connected through the compression spring 72, providing elastic force for the limiting piece 71, so that it can automatically reset after the operation shaft 51 rotates and is inserted into the insertion hole 73 of the operation shaft 51, playing a role of limiting the rotation of the operation shaft 51, the operation shaft 51 is provided with the insertion hole 73 close to the limiting piece 71, the limiting piece 71 is provided with the spherical protrusion on the front side, the spherical protrusion of the limiting piece 71 slides in the inner wall of the insertion hole 73, the inner side of the insertion hole 73 is provided with a circular arc surface, guiding the movement of the limiting piece 71 during the rotation of the operation shaft 51, and providing the limiting piece 71 to be inserted after the operation is completed, realizing the limiting of the operation shaft 51.

[0037] Working principle: when the inner pipe 4 needs to be supported and fixed during use, the operator rotates the operation shaft 51 by using a wrench, the tooth groove 53 on the operation shaft 51 is engaged with the tooth 56 on the outer side of the rotating part 55, thereby driving the rotating part 55 to rotate in the inner wall of the shell 54,

[0038] ​When the rotating member 55 rotates, the outer groups of inclined circular arc-shaped guide grooves 52 drive the moving blocks 58 to move outward, and the moving blocks 58 slide in the sliding grooves 57 at the same time, so that the moving blocks 58 move outward along the radial direction of the outer shell 54, and the rubber pads 6 fixed on the outer sides of the moving blocks 58 are extruded outward to press the outer pipe 1, and the rubber pads 6 and the inner wall of the outer pipe 1 generate friction and extrusion force, which supports and fixes the inner pipe 4, ensures the stable position of the inner pipe 4 in the outer pipe 1, improves the stability of the inner pipe 4, and makes the device applicable to longer double-wall pipes and reduces the need for splicing.

[0039] When the inner pipe 4 needs to be replaced or maintained, the operating shaft 51 is reversely rotated, the reverse rotation of the operating shaft 51 drives the reverse movement of the gear groove 53, the gear teeth 56 drive the reverse rotation of the rotating member 55, the guide groove 52 guides the moving block 58 to move inward to the outer shell 54, the rubber pad 6 is extruded away from the inner wall of the outer pipe 1, and the support and fixation of the inner pipe 4 are released, and then the bolts are disassembled to facilitate subsequent operation of the inner pipe 4, thereby improving the maintenance efficiency.

[0040] During the rotation of the operating shaft 51, the spherical protrusions on the front side of the limiting member 71 in the limiting assembly on the inner wall of the fixed disc 3 slide in the insertion hole 73 of the operating shaft 51, when the operating shaft 51 rotates, the insertion hole 73 is extruded away from the limiting member 71, but after the rotation of the operating shaft 51 is stopped, the limiting member 71 is reset under the elastic force of the compression spring 72, the spherical protrusions of the limiting member 71 are inserted into the corresponding insertion hole 73 of the operating shaft 51, the self-rotation of the operating shaft 51 is prevented due to external force and other factors, thereby ensuring the stability of the support of the inner pipe 4, avoiding the instability of the support of the inner pipe 4 caused by the accidental rotation of the operating shaft 51, and the sealing ring 8 is tightly attached to the outer side of the operating shaft 51, thereby ensuring the vacuum environment in the annular cavity, maintaining the heat insulation performance of the double-wall pipe, ensuring the performance stability of the double-wall pipe when conveying ultra-low temperature medium, avoiding the influence of the vacuum heat insulation effect caused by the entry of foreign matters from the outside, and further affecting the conveying of the medium in the inner pipe 4.

[0041] Finally, it should be pointed out that the above description is only a preferred embodiment of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement of some technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A vacuum-insulated double-walled tube inner tube fixing support mechanism, comprising an outer tube (1), characterized in that: A flange (2) is fixedly connected to the end of the outer tube (1). A fixed plate (3) is provided on the inner wall of the flange (2). An inner tube (4) is inserted into the outer side of the fixed plate (3). A support mechanism is provided on the outer side of the inner tube (4). The support mechanism includes a support component and a transmission component. The support component includes a shell (54). The shell (54) is slidably connected to the outer side of the inner tube (4). A rotating component (55) is rotatably connected to the inner wall of the shell (54). A guide groove (52) is provided through the outer side of the rotating component (55). A moving block (58) is provided on the inner wall of the rotating component (55). The moving block (58) slides on the inner wall of the guide groove (52). A sliding groove (57) is provided through the outer side of the shell (54). The moving block (58) slides on the inner wall of the sliding groove (57).

2. The vacuum insulated double-walled tube inner tube fixing support mechanism according to claim 1, characterized in that: The transmission assembly includes an operating shaft (51), which is rotatably connected to the inner wall of the fixed disk (3). The outer side of the operating shaft (51) is rotatably connected to the inner wall of the outer casing (54). The guide groove (52) is provided with a toothed groove (53) near the inside of the outer casing (54). The rotating part (55) is provided with teeth (56) on its outer side, and the teeth (56) mesh with the inner side of the toothed groove (53).

3. The vacuum insulated double-walled tube inner tube fixing support mechanism according to claim 2, characterized in that: A rubber pad (6) is fixedly connected to the outside of the moving block (58), and a sealing ring (8) is fixedly connected to the inner wall of the fixed disk (3). The sealing ring (8) is attached to the outside of the operating shaft (51).

4. The vacuum insulated double-walled tube inner tube fixing support mechanism according to claim 1, characterized in that: The guide groove (52) is provided in multiple sets, and the multiple sets of guide grooves (52) are arranged in an inclined arc shape.

5. The vacuum insulated double-walled tube inner tube fixing support mechanism according to claim 1, characterized in that: The slide groove (57) is provided in multiple sets, and the multiple sets of slide groove (57) are perpendicular to the center of the outer shell (54).

6. The vacuum insulated double-walled tube inner tube fixing support mechanism according to claim 2, characterized in that: The movable block (58) has a columnar structure on its outer side, and the operating shaft (51) has a regular hexagonal groove on its front side.

7. The vacuum insulated double-walled tube inner tube fixing support mechanism according to claim 2, characterized in that: The inner wall of the fixed disk (3) is provided with a limiting component, which includes a limiting member (71). The limiting member (71) is slidably connected to the inner wall of the fixed disk (3). The limiting member (71) and the fixed disk (3) are elastically connected by a compression spring (72). The operating shaft (51) is provided with an insertion hole (73) near the limiting member (71).

8. The vacuum insulated double-walled tube inner tube fixing support mechanism according to claim 7, characterized in that: The limiting member (71) has a spherical protrusion on its front side. The spherical protrusion of the limiting member (71) slides on the inner wall of the insertion hole (73). The inner side of the insertion hole (73) is set as an arc surface.

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