Pipeline compensator

Abstract

The invention belongs to the technical field of airborne environment control high-pressure pipelines, and particularly relates to a pipeline compensator which comprises an internal pipeline and an external heat insulation protection structure. The internal pipeline comprises a first joint, a first connecting ring, a corrugated pipe, an inner sleeve, a second connecting ring, a bent pipe and a second joint which are connected in sequence; the external heat insulation protection structure comprises a first heat insulation cover, a third heat insulation cover, a support and a second heat insulation cover which are connected in sequence.

Description

Technical Field

[0001] The invention belongs to the technical field of airborne environmental control high-pressure pipelines, and in particular relates to a pipeline compensator. Background Art

[0002] The pipeline compensator is composed of a bellows and other structural parts. It transmits high-temperature and high-pressure airflow through the internal circulation sealing structure to achieve the sealing connection function. At the same time, the corresponding displacement of the product's flexible compensation component - the bellows is used to compensate for the installation error, vibration and thermal expansion and contraction of the pipeline system caused by high temperature, thereby reducing the stress of the pipeline system and making the pipeline system work safely and reliably.

[0003] Pipeline compensators are usually installed in high-temperature gas source areas, where multiple structures and sensors are arranged. When working, high-temperature gas of about 500°C flows inside the pipeline compensator, and there is a strong airflow outside. In order to reduce the thermal diffusion of the high-temperature heat source and avoid failure of nearby equipment and sensors, pipeline compensators are usually wrapped with non-metallic materials on the surface, and finally the insulation layer is fixed by sewing fiber threads or fixing with buttons. However, this method has defects such as weak wind resistance, low strength of the fixed structure and easy damage. In addition, in order to ensure the compensation ability of the product, the bellows cannot be coated, resulting in serious thermal diffusion of the heat source there, which brings a series of problems. Summary of the invention

[0004] The purpose of the present invention is to solve the current situation that the conventionally coated pipeline compensator has weak wind resistance, incomplete insulation area, and easy damage of insulation fixed structure. The present invention proposes a pipeline compensator with compensation insulation capacity, which has the advantages of complete insulation area, high strength, not easy to be damaged, strong compensation capacity, etc.

[0005] Technical Solution

[0006] A pipeline compensator, comprising: an internal pipeline of the compensator and an external heat insulation protection structure;

[0007] The internal pipeline includes a first joint, a first connecting ring, a bellows, a second connecting ring, a bent pipe, and a second joint which are connected in sequence;

[0008] The external heat insulation protection structure comprises: a first heat insulation cover, a third heat insulation cover, a support, and a second heat insulation cover which are connected in sequence.

[0009] Furthermore, one end of the first heat shield is welded to the first joint, and the other end is welded to the first connecting ring to ensure the fixing strength of the heat shield.

[0010] Furthermore, one end of the third heat insulation cover is welded to the first heat insulation cover, and the other end is welded to the support, thereby ensuring the fixing strength of the heat insulation cover and full coverage of the heat insulation area.

[0011] The third heat shield is a cylindrical structure with an S-shaped cross section, so that the heat shield has a certain compensation capacity.

[0012] Further, one end of the support is welded to the third heat shield, and the other end is welded to the bent pipe, so that the support is a cylindrical structure with a broken line cross section, serving as the welding end of the third heat shield.

[0013] Furthermore, the second heat shield follows the shape of the bent pipe, one end of which is welded to the second joint, and the other end of which extends to cover the support and is welded to the third heat shield, thereby ensuring the fixing strength of the heat shield and full coverage of the heat insulation area.

[0014] Furthermore, the compensator further comprises: an inner sleeve, one end of which is welded to a connecting ring in the incoming flow direction, and the other end is suspended;

[0015] The length of the inner sleeve is 80% ± 5% of the original length of the bellows, which reduces the air flow resistance of the pipeline.

[0016] Furthermore, the length of the third heat shield after unfolding minus the axial length of the two end surfaces in the original state is greater than the compensation amount of the bellows, ensuring that the heat shield is not damaged while the body is displaced by the bellows.

[0017] Furthermore, the third heat insulation cover is a flexible stainless steel dense mesh sandwiching a heat insulation material, so as to realize the compensation and heat insulation functions of the compensator.

[0018] Furthermore, the first heat insulation cover and the second heat insulation cover are metal sheets sandwiching heat insulation materials, so as to realize the heat insulation function of the compensator.

[0019] The technical effects of the present invention are:

[0020] 1) Different types of heat shields are fixed to the product itself by continuous welding, which has the advantages of high strength and not easy to be damaged;

[0021] 2) The pipeline compensator achieves full coverage of thermal insulation materials by setting fixed and compensating types of thermal insulation covers in different areas, avoiding heat diffusion of high-temperature heat sources, thereby ensuring the safety of sensors and other structures near the area.

[0022] 3) Due to the flexibility of the main body material and the shape of the corrugated structure, the third heat shield, together with the bellows, can achieve the compensation function of the pipeline compensator without being affected BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of a pipeline compensator. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0025] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0026] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0028] A pipeline compensator is assembled and welded by a first joint, a first connecting ring, a bellows, an inner sleeve, a second connecting ring, a bend, a second joint, a first heat insulation cover, a third heat insulation cover, a support, a second heat insulation cover and other components.

[0029] Among them, the first joint, the first connecting ring, the bellows, the inner sleeve, the second connecting ring, the elbow, and the second joint are the internal pipeline structure, and its core component - the bellows is a flexible structure that can compensate for displacement and absorb pipeline stress; the inner sleeve is a reducer, and the length is 80%±5% of the original length of the bellows, which can reduce the air flow resistance of the pipeline; the first joint and the second joint are interface parts for realizing the connection between the pipeline and the outside; the first connecting ring, the second connecting ring, and the elbow are connecting parts, and the above parts are combined and assembled into one by welding methods such as electron beam welding and argon arc welding, thereby realizing the compensation function of the pipeline compensator.

[0030] The first heat shield, the third heat shield, the support, and the second heat shield are external heat insulation protection structures. The first heat shield and the third heat shield are fixed heat insulation structures because the parts at their locations have no compensation ability. They are fixed to the product surface by sandwiching heat insulation materials with metal sheets through continuous spot welding. Specifically, one end of the first heat shield is fixed to the first joint, and the other end is fixed to the first connecting ring. One section of the second heat shield is fixed to the first heat shield, and the other end is fixed to the second joint.

[0031] The third heat shield is located above the bellows. The bellows will produce axial or radial displacement during use, so a flexible heat insulation structure is adopted, which is a flexible stainless steel dense mesh sandwiching the heat insulation material. Support parts are welded on the edge of the bent pipe. One end of the third heat shield is fixed to the support and the other end is fixed to the first heat shield so that there is a height difference between the two ends, and sufficient margin is maintained in the length direction. Combined with the tooling, the "S" shape structure of the third heat shield is ensured.

[0032] The first heat shield, the third heat shield and the second heat shield are connected by lap welding to ensure full coverage of the heat shield.

[0033] The pipeline compensator not only has the compensation capability of conventional products, but also forms an external thermal insulation protection structure by setting different types of thermal insulation covers in different areas, thus realizing the pipeline compensator's functions of both high-strength full-area thermal insulation capability and compensation capability.

[0034] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pipeline compensator, characterized in that: The compensator comprises: an internal pipeline and an external heat insulation protection structure; The internal pipeline comprises a first joint (1), a first connecting ring (11), a corrugated pipe (9), a second connecting ring (5), a bent pipe (7), and a second joint (8) which are connected in sequence; The external heat insulation protection structure comprises: a first heat insulation cover (2), a third heat insulation cover (3), a support (4), and a second heat insulation cover (6) which are connected in sequence.

2. The pipeline compensator according to claim 1, characterized in that: One end of the first heat insulation cover is welded to the first joint, and the other end is welded to the first connecting ring.

3. The pipeline compensator according to claim 2, characterized in that: One end of the third heat shield is welded to the first heat shield, and the other end is welded to the support; The third heat shield is a cylindrical structure with an S-shaped cross section.

4. The pipeline compensator according to claim 3, characterized in that: One end of the support is welded to the third heat shield, and the other end is welded to the bent pipe, so that the support is a cylindrical structure with a broken line cross section.

5. The pipeline compensator according to claim 4, characterized in that: The second heat shield follows the shape of the bent pipe, one end of which is welded to the second joint, and the other end of which extends to cover the support and is welded to the third heat shield.

6. The pipeline compensator according to claim 5, characterized in that: The compensator further comprises: an inner sleeve, one end of which is welded to a connecting ring in the incoming flow direction, and the other end is suspended; The length of the inner sleeve is 80% ± 5% of the original length of the bellows.

7. The pipeline compensator according to claim 6, characterized in that: The length of the third heat shield after axial expansion minus the axial length of the two end surfaces in the initial state is greater than the compensation amount of the bellows.

8. The pipeline compensator according to claim 7, characterized in that: The third heat insulation cover is a flexible stainless steel dense mesh sandwiching heat insulation material.

9. The pipeline compensator according to claim 8, characterized in that: The first heat insulation cover and the second heat insulation cover are metal sheets sandwiching heat insulation materials.

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