CN113090824A - Double-wall pipe is carried to marine gas - Google Patents

Abstract

The application discloses double-walled pipe is carried to marine gas, wherein double-walled pipe is carried to marine gas includes an inner tube and an outer tube with axle center complete set configuration, wherein the double-walled pipe along length direction in the inner tube with the interval is provided with supporting component between the outer tube, wherein supporting component includes at least three supporting structure, wherein at least three supporting structure follows the hoop evenly distributed of inner tube, with the inner tube with form evenly supported between the outer tube, wherein supporting structure comprises a stereoplasm stand pipe and an inside support piece, wherein the perpendicular fixed connection of stand pipe the inner tube is in order to ensure the structural stability of inner tube, inside support piece elastic connection the outer tube can also possess certain buffer capacity when guaranteeing that the inner tube has sufficient stability. The double-wall pipe is simple in structure, convenient to manufacture, stronger in structural stability and capable of effectively reducing manufacturing and installation costs.

Description

Double-wall pipe is carried to marine gas

Technical Field

The invention relates to the technical field of pipe fittings, in particular to a marine gas conveying double-wall pipe.

Background

With the increasing environmental protection pressure and the increasing emission reduction requirements of international emission policies, the trend that ships use clean energy to meet the latest environmental protection requirements is more and more obvious. At present, there are increasing cases of using such as LNG (methane), ethane, propane and other combustible gases as clean fuel on ships. A fuel gas pipeline in a cabin of a ship using combustible gas as fuel is in a double-wall pipe form according to the standard requirement.

The double-wall pipe is a special pipe fitting which utilizes an inner pipe to convey fuel gas and ventilates between the inner pipe and an outer pipe. At present, in some existing double-wall pipe designs, because the structural design for supporting between an inner pipe and an outer pipe is complex, the manufacturing process of the supporting structure is complex, the supporting structure is difficult to produce, and the difficulty of manufacturing and installation is increased; simultaneously, still make the pipe diameter grow of outer tube for the double-walled pipe is whole to consume the material more, has increased material cost and the holistic weight of double-walled pipe. In addition, the buffer capacity of the existing supporting structure is not enough, and the improvement of the long-term use safety of the double-wall pipe is not facilitated.

Disclosure of Invention

The invention mainly aims to provide a marine gas conveying double-wall pipe, a plurality of support assemblies are arranged along the length direction of the double-wall pipe, each support assembly can form uniform support between an inner pipe and an outer pipe through a support structural member, the support structural members are fixedly connected with the inner pipe through guide pipes, a preset gap is formed between the guide pipes and the outer pipes, the inner pipe is elastically connected with the outer pipe through an internal support member in the guide pipes, the inner pipe is ensured to have enough stability and certain buffer capacity, the stress influence on a pipeline structure caused by pressure bearing when the double-wall pipe works is reduced, the safety is improved, and the service life is prolonged.

The invention also aims to provide the marine gas conveying double-wall pipe which is simple in structural design, convenient to manufacture, light in overall weight, suitable for popularization in multiple industries and wide in application range.

Another object of the present invention is to provide a marine gas conveying double-wall pipe, wherein the supporting structural members are a hard guide pipe and an internal supporting member, so that the supporting structural members not only can limit the internal supporting member, but also can be conveniently installed in the production and assembly process of the double-wall pipe, thereby improving the production efficiency.

Another object of the present invention is to provide a double-walled pipe for gas transportation for ships, which can provide sufficient supporting force for a supporting structure between an inner pipe and an outer pipe and has a certain buffering capacity by providing a compressed spring at the bottom of a guide pipe.

In order to achieve at least one of the above objects, the present invention provides a gas-conveying double-wall pipe for ships, wherein the double-wall pipe comprises an inner pipe and an outer pipe coaxially arranged in a set, wherein the double-wall pipe is provided with support members at intervals between the inner pipe and the outer pipe along a length direction, wherein the support members comprise at least three support structures, at least three of the support structures are uniformly distributed along a circumferential direction of the inner pipe to form uniform support between the inner pipe and the outer pipe, wherein the support members comprise a rigid guide pipe and an internal support member partially embedded in the guide pipe, the guide pipe is vertically and fixedly connected with the inner pipe with a predetermined gap from the outer pipe, and the internal support member is elastically connected with an inner wall of the outer pipe.

In a possible embodiment, the internal support member embedded in the guide tube is matched with the inner cavity of the guide tube so as to limit the internal support member to be telescopic only along the radial direction of the double-wall tube.

In a possible embodiment, the inner support is formed by a spring and a shoe, wherein the spring is arranged at the bottom of the guide tube, wherein the end near the inner tube is defined as the bottom of the guide tube, and the shoe is arranged between the spring and the outer tube.

In one possible embodiment, the spacer blocks are embodied as insulating spacer blocks.

In one possible embodiment, the spacer block is embodied as a polytetrafluoroethylene spacer block.

In a possible embodiment, the supporting pad block at least partially protrudes from the guide tube, and after the supporting structure is installed, the length of the supporting pad block at the inner part of the guide tube is larger than that of the part exposed outside the guide tube.

In a possible embodiment, the guide tube is made of metal or alloy and is welded to the outer wall of the inner tube.

In one possible embodiment, the guide tube is made of stainless steel.

In one possible embodiment, the spring is embodied in the form of a leaf spring, the material of which is stainless steel.

In a possible embodiment, the support assembly comprises four or more of said support structures.

These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description.

Drawings

Fig. 1 shows a front cross-sectional view of a gas-conveying double-walled pipe for ships according to a preferred embodiment of the invention.

Fig. 2 shows a cross-sectional view of a marine gas delivery double-walled pipe according to a preferred embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

A gas delivery double-walled pipe 100 for a ship according to a preferred embodiment of the present invention will be described in detail below with reference to fig. 1 and 2, wherein the double-walled pipe 100 includes an inner pipe 10 and an outer pipe 20 coaxially assembled together, and wherein the double-walled pipe 100 is provided with support members 30 spaced apart from each other between the inner pipe 10 and the outer pipe 20 along a length direction thereof. Obviously, the support assemblies 30 may be provided in appropriate number of groups according to the length and structural weight of the double-walled pipe 100, wherein the support assemblies 30 are arranged appropriately according to the pipe running direction and structural characteristics of the double-walled pipe 100 for the purpose of stably supporting the inner pipe 10.

The support assembly 30 includes at least three support structures 30-1, wherein at least three support structures 30-1 are uniformly distributed along the circumferential direction of the inner pipe 10 to form uniform support between the inner pipe 10 and the outer pipe 20. It should be understood by those skilled in the art that the number of the supporting structures 30-1 is at least three, and may be four or more according to the diameter of the inner tube 10, so as to form a stable support between the inner tube 10 and the outer tube 20, and sufficiently ensure the ventilation cross-sectional area between the inner tube and the outer tube, thereby reducing the ventilation resistance.

The supporting structure 30-1 is composed of a hard guiding tube 31 and an internal supporting member 32 partially embedded in the guiding tube 31, wherein the guiding tube 31 is vertically and fixedly connected to the inner tube 10, and the internal supporting member 32 is elastically connected to the outer tube 20, so that the internal supporting member 32 embedded in the guiding tube 31 can only extend and retract along the radial direction of the double-walled tube 100, thereby effectively ensuring the stability of the inner tube 10 and providing a certain buffer between the inner tube 10 and the outer tube 20.

More preferably, the guide tube 31 is vertically connected to the outer wall of the inner tube 10 by welding.

It should be noted that the length of the guide tube 31 is smaller than the distance between the inner tube 10 and the outer tube 20, so that the guide tube 31 does not directly contact with the outer tube 20.

As a preferred embodiment of the present invention, the inner supporting member 32 embedded in the guiding tube 31 is matched with the inner cavity of the guiding tube 31 to precisely limit the inner supporting member 32, so that it can only extend and contract along the radial direction and cannot move perpendicular to the length direction of the guiding tube 31.

Further preferably, the inner support 32 comprises a spring 321 and a support block 322, wherein the spring 321 is disposed at the bottom of the guide tube 31, wherein an end near the inner tube 10 is defined as the bottom of the guide tube 31, and the support block 322 is disposed between the spring 321 and the outer tube 20. The internal support 32 is in a compressed state after it is installed within the double-walled pipe 100. The spring 321 ensures that the inner support 32 has sufficient supporting force between the inner tube 10 and the outer tube 20 by its repulsive force tending to expand, and at the same time, can bring about a certain buffering capacity.

When the double-wall pipe 100 works, the pipe structure will bear pressure due to the delivery of fuel gas, the buffer capacity of the support assembly 30 will reduce the stress influence on the pipe structure, the safety is improved, and the service life is prolonged. Meanwhile, the elastic structure is also very convenient for the installation of the supporting structural member 30-1 in the production and assembly process of the double-wall pipe 100, and the production efficiency is improved.

This double-walled pipe 100 is not only structural design simple, and it is convenient to make, and whole light in weight is convenient for transportation and installation moreover, can effectively reduce overall manufacturing cost and installation cost.

It is further preferred that the spacers 322 are implemented as insulating spacers, so as to avoid charge accumulation that may occur due to friction between the spacers 322 and the outer pipe 20 during operation of the double-walled pipe 100, and to make the use of the double-walled pipe 100 safer.

The spacer block 322 is preferably implemented as a teflon spacer block in view of excellent insulating properties of teflon, together with its mechanical strength, chemical and thermal stability, to meet the severe service requirements of the marine gas double-walled pipe.

It is further preferred that the supporting pad 322 is partially exposed outside the guiding tube 31, and after the installation of the supporting structural member 30-1 is completed, the length of the supporting pad 322 inside the guiding tube 31 is greater than that of the part exposed outside the guiding tube 31, so as to ensure that the supporting pad 322 cannot slide out of the guiding tube 31 under any condition.

In one possible embodiment, the guide tube 31 is made of metal or an alloy. To ensure that the double-walled pipe 100 can be stably operated in a marine environment such as a sea for a long period of time, the guide pipe 31 is preferably made of stainless steel so as to be protected from corrosive media in the marine environment.

In a possible embodiment, the spring 321 is implemented as a leaf spring made of stainless steel, which facilitates manufacturing and avoids the effects of corrosive media in the marine environment.

It will be appreciated by persons skilled in the art that the embodiments of the invention shown in the foregoing description are by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.

Claims (10)

1. A marine gas delivery double-walled pipe, comprising an inner pipe and an outer pipe coaxially arranged in a set, wherein the double-walled pipe is provided with support members spaced apart from each other along a length direction between the inner pipe and the outer pipe, wherein the support members comprise at least three support members uniformly distributed along a circumferential direction of the inner pipe to form uniform support between the inner pipe and the outer pipe, wherein the support members comprise a rigid guide pipe and an internal support member partially embedded in the guide pipe, the guide pipe is vertically and fixedly connected to the inner pipe with a predetermined gap from the outer pipe, and the internal support member is elastically connected to an inner wall of the outer pipe.

2. The marine gas delivery double-walled tube according to claim 1, wherein the inner support member embedded in the guide tube is fitted into an inner cavity of the guide tube to limit the inner support member to be telescopic only in a radial direction of the double-walled tube.

3. The marine gas delivery double wall pipe of claim 2, wherein the internal support is comprised of a spring and a shoe, wherein the spring is disposed at a bottom of the guide pipe, wherein an end near the inner pipe is defined as the bottom of the guide pipe, and the shoe is disposed between the spring and the outer pipe.

4. A marine gas-conveying double-walled pipe as claimed in claim 3, wherein the support spacers are embodied as insulating spacers.

5. A marine gas-conveying double-walled pipe as claimed in claim 4, wherein the spacer block is embodied as a polytetrafluoroethylene spacer block.

6. A marine gas delivery double-walled pipe as claimed in any one of claims 3 to 5, wherein the spacer blocks at least partially protrude from the guide pipe, and after the support structure is installed, the length of the inner portion of the guide pipe in which the spacer blocks are located is greater than the length of the outer portion of the guide pipe which is exposed.

7. A marine gas delivery double wall pipe according to claim 3, wherein the guide pipe is implemented as a metal or an alloy material, and the guide pipe is welded to an outer wall of the inner pipe.

8. The marine gas delivery double-walled tube of claim 7, wherein the guide tube is implemented as a stainless steel material.

9. A marine gas-conveying double-walled pipe as claimed in claim 8, wherein the spring is implemented as a leaf spring, and the spring is made of stainless steel.

10. A marine gas-conveying double-walled tube as claimed in claim 9, wherein the support assembly includes four or more support structures.

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