CN113202630A

CN113202630A - Pipeline structure

Info

Publication number: CN113202630A
Application number: CN202110661212.4A
Authority: CN
Inventors: 张玉光; 赵煜; 杜成
Original assignee: AECC Shenyang Engine Research Institute
Current assignee: AECC Shenyang Engine Research Institute
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2021-08-03

Abstract

The utility model belongs to the technical field of the withstand voltage pipeline of temperature resistant design, concretely relates to pipeline structure, include: an outer tube; the two inner pipes are arranged in the outer pipe along the axial direction, and the opposite ends of the two inner pipes are in lap joint and can relatively slide along the axial direction; and each group of elastic supporting sheets is correspondingly supported between one inner tube and one outer tube and distributed around the corresponding inner tube.

Description

Pipeline structure

Technical Field

The application belongs to the technical field of temperature-resistant and pressure-resistant pipeline design, and particularly relates to a pipeline structure.

Background

In various tests carried out by aeroengines and gas turbine combustors, compressed air is mostly required to be conveyed by connecting pipelines, the temperature of the compressed air required to be conveyed in some tests is required to be more than 400 ℃, the pressure is required to be more than 1MPa, and common pipelines are difficult to bear the high temperature and pressure, can deform seriously and cause serious influence on the performance of other equipment.

At present, the wall thickness through increasing the pipeline is many, makes the pipe utensil have the tolerance ability of higher temperature, pressure to control the deformation of pipeline through design ripple structure, need calculate, optimize the whole of pipeline and part during the design, the design process is complicated, and the degree of difficulty is great, and the cost is higher, and in addition, the pipeline that the design obtained is fatigue resistance can not be good more, and later maintenance nature is relatively poor.

The present application has been made in view of the above-mentioned technical drawbacks.

It should be noted that the above background disclosure is only for the purpose of assisting understanding of the inventive concept and technical solutions of the present invention, and does not necessarily belong to the prior art of the present patent application, and the above background disclosure should not be used for evaluating the novelty and inventive step of the present application without explicit evidence to suggest that the above content is already disclosed at the filing date of the present application.

Disclosure of Invention

It is an object of the present application to provide a pipe structure to overcome or alleviate at least one of the technical disadvantages of the known prior art.

The technical scheme of the application is as follows:

a piping structure comprising:

an outer tube;

the two inner pipes are arranged in the outer pipe along the axial direction, and the opposite ends of the two inner pipes are in lap joint and can relatively slide along the axial direction;

and each group of elastic supporting sheets is correspondingly supported between one inner tube and one outer tube and distributed around the corresponding inner tube.

According to at least one embodiment of the present application, in the above-mentioned pipe structure, two ends of each group of elastic support pieces are bent back, one end of each group of elastic support pieces abuts against the inner wall of the outer pipe, and the other end of each group of elastic support pieces abuts against the outer wall of the corresponding inner pipe.

According to at least one embodiment of the present application, in the above-described piping structure, a heat insulating material is filled between the two inner pipes and the outer pipe.

According to at least one embodiment of the present application, in the above-described pipe structure, the heat insulating material is aerogel.

According to at least one embodiment of the present application, the above-mentioned pipe structure further includes:

and one end of the support ring is sleeved on the outer wall of one inner pipe and is fixedly connected with the inner pipe, and the other end of the support ring is sleeved on the outer wall of the other inner pipe and is in sliding connection with the inner pipe.

According to at least one embodiment of the present application, in the above-mentioned pipe structure, one end of the support ring near the inlet end of the outer pipe is slidably connected to the corresponding inner pipe;

one end of the support ring close to the outlet end of the outer pipe is fixedly connected with the corresponding inner pipe.

Drawings

FIG. 1 is a schematic diagram of a pipeline configuration provided by an embodiment of the present application;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

wherein:

1-an outer tube; 2-inner tube; 3-an elastic support sheet; 4-heat insulating material; 5-support ring.

For the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; further, the drawings are for illustrative purposes, and terms describing positional relationships are limited to illustrative illustrations only and are not to be construed as limiting the patent.

Detailed Description

In order to make the technical solutions and advantages of the present application clearer, the technical solutions of the present application will be further clearly and completely described in the following detailed description with reference to the accompanying drawings, and it should be understood that the specific embodiments described herein are only some of the embodiments of the present application, and are only used for explaining the present application, but not limiting the present application. It should be noted that, for convenience of description, only the parts related to the present application are shown in the drawings, other related parts may refer to general designs, and the embodiments and technical features in the embodiments in the present application may be combined with each other to obtain a new embodiment without conflict.

In addition, unless otherwise defined, technical or scientific terms used in the description of the present application shall have the ordinary meaning as understood by one of ordinary skill in the art to which the present application belongs. The terms "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer", and the like used in the description of the present application, which indicate orientations, are used only to indicate relative directions or positional relationships, and do not imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and when the absolute position of the object to be described is changed, the relative positional relationships may be changed accordingly, and thus, should not be construed as limiting the present application. The use of "first," "second," "third," and the like in the description of the present application is for descriptive purposes only to distinguish between different components and is not to be construed as indicating or implying relative importance. The use of the terms "a," "an," or "the" and similar referents in the context of describing the application is not to be construed as an absolute limitation on the number, but rather as the presence of at least one. The word "comprising" or "comprises", and the like, when used in this description, is intended to specify the presence of stated elements or items, but not the exclusion of other elements or items.

Further, it is noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and the like are used in the description of the invention in a generic sense, e.g., connected as either a fixed connection or a removable connection or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected through the inside of two elements, and those skilled in the art can understand their specific meaning in this application according to the specific situation.

The present application is described in further detail below with reference to fig. 1-2.

A piping structure comprising:

an outer tube 1;

the two inner pipes 2 are arranged on the inner side of the outer pipe 1 along the axial direction, and the opposite ends are in lap joint connection and can relatively slide along the axial direction;

and each group of elastic support sheets 3 is correspondingly supported between one inner tube 2 and one outer tube 1 and distributed around the corresponding inner tube 2.

With regard to the pipe structure disclosed in the above embodiments, it can be understood by those skilled in the art that the two inner pipes 2 overlapped with each other in the outer pipe 1 form a fluid flow channel, and are in direct contact with the fluid, and since the two inner pipes 2 can relatively slide along the axial direction, the control of the axial deformation of the pipe can be effectively realized under high temperature conditions, and in addition, the two inner pipes 2 are supported in the outer pipe 1 by two sets of elastic support pieces 3, and the elastic support pieces 3 can radially extend and contract along the inner pipes 2, and do not limit the radial deformation of the inner pipes 2 under high temperature conditions.

For the pipeline structure disclosed in the above embodiment, those skilled in the art can also understand that there is a gap between the outer pipe 1 and the two inner pipes 2, which can prevent the heat of the fluid from being transmitted to the outer pipe 1, the heat of the fluid is mainly borne by the inner pipes 2, and the heat borne by the outer pipe 1 is small, so that the outer pipe 1 does not deform seriously, and therefore, the deformation can be effectively controlled inside the outer pipe 1 under the high temperature condition, and no influence is caused on the external device, in addition, the heat loss of the high temperature fluid can be effectively prevented, and no overhigh temperature is generated on the outer pipe 1, thereby preventing the scald of the operator.

For the pipeline structure disclosed in the above embodiment, those skilled in the art can also understand that, in this structure, the heat of the fluid is mainly borne by the two inner pipes 2, and can be made of temperature-resistant stainless steel with relatively small thickness, the pressure is mainly borne by the outer pipe 1, and can be made of common stainless steel with relatively large thickness, and when designing, the characteristics that the inner pipes 2 bear the temperature load and the outer pipes 1 bear the pressure load can be respectively considered, so that the design process can be effectively simplified, and the design difficulty can be reduced.

With respect to the pipe structure disclosed in the above embodiments, it will also be understood by those skilled in the art that the corrugated structure is not present, the fatigue resistance is better, and the later maintenance is facilitated.

In some alternative embodiments, in the above-mentioned pipe structure, each set of elastic support pieces 3 has two ends bent away from each other, one end abutting against the inner wall of the outer pipe 1 and the other end abutting against the outer wall of the corresponding inner pipe 2.

With regard to the pipe structure disclosed in the above embodiments, it can be understood by those skilled in the art that the elastic support sheet 3 is substantially Z-shaped, can be stably supported between the outer pipe 1 and the inner pipe 2, has a large deformation capability, and can be stretched and contracted along the radial direction along with the inner pipe 2.

In some alternative embodiments, the above-mentioned pipeline structure is formed by filling an insulating material 4 between two inner pipes 2 and two outer pipes 1.

With respect to the pipe structure disclosed in the above embodiments, it will be understood by those skilled in the art that the heat insulating material 4 between the two inner pipes 2 and the outer pipe 1 can form a heat insulating layer between the two inner pipes 2 and the outer pipe 1, thereby further effectively preventing the heat of the fluid from being transmitted from the inner pipe 2 to the outer pipe 1.

In some alternative embodiments, the thermal insulation material 4 in the above-mentioned pipe structure is aerogel, and the specific thickness thereof can be determined by the related art according to the specific practice when applying the present application.

In some optional embodiments, the above pipeline structure further includes:

and one end of the support ring 5 is sleeved on the outer wall of one inner tube 2 and is fixedly connected with the inner tube 2, and the other end of the support ring is sleeved on the outer wall of the other inner tube 2 and is in sliding connection with the inner tube 2.

For the pipeline structure disclosed in the above embodiment, those skilled in the art can understand that the support ring 5 is sleeved at one end of the two inner pipes 2 opposite to each other and is fixedly connected with one of the inner pipes 2, so that the fluid pressure can be effectively conducted, the pressure balance at the inner pipe 2 can be ensured, and the ability of the two inner pipes 2 to relatively slide along the axial direction can be ensured by slidably connecting with the other inner pipe 2.

With respect to the pipe structure disclosed in the above embodiments, it can be understood by those skilled in the art that a sufficient gap should be left between the opposite ends of the two inner pipes 2 inside the support ring 5 to ensure that the inner pipes 2 do not deform beyond the length range of the outer pipe 1 in the axial direction under high temperature conditions, and the specific size of the gap can be determined by those skilled in the relevant art according to the specific practice when applying the present application.

In some alternative embodiments, in the above-mentioned pipe structure, one end of the support ring 5 near the inlet end of the outer pipe 1 is slidably connected to the corresponding inner pipe 2;

one end of the support ring 5 close to the outlet end of the outer tube 1 is fixedly connected with the corresponding inner tube 2.

The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

Having thus described the present application in connection with the preferred embodiments illustrated in the accompanying drawings, it will be understood by those skilled in the art that the scope of the present application is not limited to those specific embodiments, and that equivalent modifications or substitutions of related technical features may be made by those skilled in the art without departing from the principle of the present application, and those modifications or substitutions will fall within the scope of the present application.

Claims

1. A piping structure, comprising:

an outer tube (1);

the two inner pipes (2) are arranged on the inner side of the outer pipe (1) along the axial direction, and the opposite ends are in lap joint connection and can relatively slide along the axial direction;

the elastic support plates (3) are correspondingly supported between the inner tube (2) and the outer tube (1) and distributed around the corresponding inner tube (2).

2. The piping structure according to claim 1,

and two ends of each group of elastic support sheets (3) are bent back, one end of each group of elastic support sheets is attached to the inner wall of the outer tube (1), and the other end of each group of elastic support sheets is attached to the outer wall of the corresponding inner tube (2).

3. The piping structure according to claim 1,

and a heat insulation material (4) is filled between the two inner pipes (2) and the outer pipe (1).

4. The piping structure according to claim 3,

the heat insulation material (4) is aerogel.

5. The piping structure according to claim 1,

further comprising:

and one end of the support ring (5) is sleeved on one outer wall of the inner pipe (2) and is fixedly connected with the inner pipe (2), and the other end of the support ring is sleeved on the other outer wall of the inner pipe (2) and is in sliding connection with the inner pipe (2).

6. The piping structure according to claim 5,

one end of the support ring (5) close to the inlet end of the outer pipe (1) is connected with the corresponding inner pipe (2) in a sliding way;

one end of the support ring (5) close to the outlet end of the outer pipe (1) is fixedly connected with the corresponding inner pipe (2).