CN220930493U

CN220930493U - Double-layer pipeline switching device

Info

Publication number: CN220930493U
Application number: CN202323120975.1U
Authority: CN
Inventors: 陆庆华; 叶兰; 吴思婷
Original assignee: DAMING HEAVY INDUSTRY CO LTD
Current assignee: DAMING HEAVY INDUSTRY CO LTD
Priority date: 2023-11-20
Filing date: 2023-11-20
Publication date: 2024-05-10
Anticipated expiration: 2033-11-20

Abstract

The utility model discloses a double-layer pipeline switching device, which comprises a switching joint, wherein a first end of the switching joint is fixedly connected with an inner tank of a double-layer tank, and a second end of the switching joint is fixedly connected with a double-layer pipeline; the second end of the adapter body is provided with an angle joint connecting block, the angle joint connecting block is connected with an inner connecting pipe, a connecting part of the angle joint connecting block and the inner connecting pipe is provided with a ring plate, and the outer edge of the ring plate is provided with an outer connecting pipe; the outer connecting pipe is parallel to the inner connecting pipe, and the outer port of the outer connecting pipe is shorter than the outer port of the inner connecting pipe; the outer connecting pipe is connected to the outer pipe of the double-layer pipeline, and the inner connecting pipe is connected to the inner pipe of the double-layer pipeline. The utility model is convenient for detecting the weld quality of the inner tube and the outer tube, and the concentricity of the inner tube and the outer tube is consistent, and the transfer is convenient.

Description

Double-layer pipeline switching device

Technical Field

The utility model relates to a marine LNG double-layer tank, in particular to a double-layer pipeline switching device.

Background

The marine LNG double-layer tank adopts a double-layer form based on the requirements of leakage prevention and vacuum insulation of pipelines. This form of detection requires high detection requirements due to the role it plays. The inner tank body single-layer pipe is to be connected to the double-layer pipeline, namely, a switching structure is needed between the inner tank and the double-layer pipeline, and in the switching structure, the connection form between the inner tank and the outer pipe of the double-layer pipeline adopts an angle connection form. However, the corner joint has the following disadvantages:

1. The welded joint between the outer tube of the double-layer tube and the adapter device cannot be subjected to radial detection, the quality of the welded joint of the joint cannot be ensured, and the welded joint is a significant possible leakage point.

2. The concentricity of the inner tube and the outer tube is not easy to control.

Disclosure of utility model

In order to solve the defects in the prior art, the utility model provides the double-layer pipeline switching device which is convenient for detecting the weld quality of the inner pipe and the outer pipe, and has consistent concentricity of the inner pipe and the outer pipe and convenient switching.

In order to achieve the technical purpose, the utility model adopts the following technical scheme: the double-layer pipeline switching device comprises a switching joint, wherein a first end of the switching joint is fixedly connected with an inner tank of a double-layer tank, and a second end of the switching joint is fixedly connected with a double-layer pipeline;

the second end of the adapter body is provided with an angle joint connecting block, the angle joint connecting block is connected with an inner connecting pipe, a connecting part of the angle joint connecting block and the inner connecting pipe is provided with a ring plate, and the outer edge of the ring plate is provided with an outer connecting pipe; the outer connecting pipe is parallel to the inner connecting pipe, and the outer port of the outer connecting pipe is shorter than the outer port of the inner connecting pipe; the outer connecting pipe is connected to the outer pipe of the double-layer pipeline, and the inner connecting pipe is connected to the inner pipe of the double-layer pipeline.

Further, the corner joint connecting block, the outer connecting pipe, the inner connecting pipe and the annular plate are of an integrated structure.

Further, the outer diameter of the corner joint connection blocks is greater than the outer diameter of the ring plate.

Further, the outer diameters of the outer connecting pipe and the annular plate are the same.

Further, the first end of the adapter body is provided with an interface, the interface is fixed in the inner tank, and an inner hole of the interface is communicated with an inner hole of the inner connecting pipe.

In summary, the present utility model achieves the following technical effects:

The connecting mode of the switching device and the double-layer pipe is that the inner pipe and the outer pipe are in a butt joint mode, and meanwhile, the inner pipe and the outer pipe form a certain length difference, so that the device is convenient to machine and detect;

The utility model structurally realizes that the connection mode of the double-layer pipe and the conversion device is butt joint, thereby ensuring the concentricity of the inner pipe;

After the butt joint mode is adopted, the welding joint can implement ray detection, and the quality of a welding seam of the welding joint can be ensured through detection, so that leakage points are avoided;

The utility model controls the critical dimension, and ensures the feasibility of nondestructive testing and machining.

Drawings

FIG. 1 is a schematic diagram of a dual-layer pipeline switching device according to an embodiment of the present utility model;

Fig. 2 is a schematic view of an adapter.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Examples:

as shown in FIG. 1, the double-layer pipeline switching device comprises a switching joint 1, wherein a first end of the switching joint 1 is fixedly connected with an inner tank 3 of a double-layer tank, a second end of the switching joint 1 is fixedly connected with a double-layer pipeline 2, and the double-layer pipeline 2 penetrates out of an outer tank 4 of the double-layer tank.

As shown in fig. 2, a schematic diagram of an adapter is shown, a corner joint connection block 101 is arranged at a second end of a body of the adapter 1, the corner joint connection block 101 is connected with an inner connection pipe 103, a ring plate 104 is arranged at a connection position of the corner joint connection block 101 and the inner connection pipe 103, and an outer connection pipe 102 is arranged at an outer edge of the ring plate 104; the outer connecting pipe 102 is parallel to the inner connecting pipe 103, so that the inner pipe and the outer pipe of the double-layer pipeline 2 are conveniently connected, welding and testing are also convenient, the outer port of the outer connecting pipe 102 is shorter than the outer port of the inner connecting pipe 103, and the welding positions of the two pipelines are different, so that testing is convenient; the outer connection pipe 102 is connected to the outer pipe 21 of the double pipe 2, and the inner connection pipe 103 is connected to the inner pipe 22 of the double pipe 2.

In this embodiment, the corner joint connection block 101, the outer connection pipe 102, the inner connection pipe 103, and the ring plate 104 are integrally formed. Not only can strengthen the whole intensity, but also is convenient for the butt joint of the double-layer tank.

The outer diameter of the corner joint connection block 101 is larger than that of the ring plate 104, and the outer diameters of the outer connection pipe 102 and the ring plate 104 are the same, so that the outer pipe 21 can be conveniently installed.

The first end of the adapter 1 body is provided with an interface 105, the interface 105 is fixed on the inner tank 3, and the inner hole of the interface 105 is communicated with the inner hole of the inner connecting pipe 103.

In this embodiment, the horizontal distance L1 between the outer port of the inner connecting tube 103 and the outer port of the outer connecting tube 102 controls the length of L1, which is convenient for the implementation of the radiation detection, and the inner tube and the outer tube will not affect each other.

In this embodiment, the length of the outer connecting tube 102 is L2, L2 is greater than 30mm, which is convenient for the machining of the inner and outer tube connection.

In this embodiment, the thickness of the ring plate 104 is L3, which is used to thicken the corner joint connection block 101 and to fix the outer connection pipe 102.

In this embodiment, the distance L4 between the inner wall of the inner connecting pipe 103 and the outer wall of the outer connecting pipe 102 is controlled to control L4, so as to facilitate the butt joint of the inner and outer pipes.

The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical principles of the present utility model are within the scope of the technical solutions of the present utility model.

Claims

1. The utility model provides a double-deck pipeline switching device which characterized in that: the double-layer pipeline connecting device comprises an adapter (1), wherein a first end of the adapter (1) is fixedly connected with an inner tank (3) of the double-layer tank, and a second end of the adapter (1) is fixedly connected with the double-layer pipeline (2);

The second end of the adapter body (1) is provided with an angle joint connecting block (101), the angle joint connecting block (101) is connected with an inner connecting pipe (103), a ring plate (104) is arranged at the joint of the angle joint connecting block (101) and the inner connecting pipe (103), and an outer connecting pipe (102) is arranged at the outer edge of the ring plate (104); the outer connecting pipe (102) is parallel to the inner connecting pipe (103), and the outer port of the outer connecting pipe (102) is shorter than the outer port of the inner connecting pipe (103); the outer connecting pipe (102) is connected to the outer pipe (21) of the double-layer pipeline (2), and the inner connecting pipe (103) is connected to the inner pipe (22) of the double-layer pipeline (2).

2. The dual pipeline switching device according to claim 1, wherein: the angle joint connecting block (101), the outer connecting pipe (102), the inner connecting pipe (103) and the annular plate (104) are of an integrated structure.

3. The dual pipeline switching device according to claim 2, wherein: the outer diameter of the corner joint connection block (101) is larger than the outer diameter of the annular plate (104).

4. A dual layer conduit transfer device in accordance with claim 3 wherein: the outer diameters of the outer connecting pipe (102) and the annular plate (104) are the same.

5. The dual pipeline switching device according to claim 1, wherein: the first end of adapter (1) body is provided with interface (105), interface (105) are fixed in inner tank (3), the hole of interface (105) with the hole intercommunication of interior takeover (103).