CN210716349U

CN210716349U - Inflatable positive pressure inerting gas double-wall pipe

Info

Publication number: CN210716349U
Application number: CN201921106720.0U
Authority: CN
Inventors: 卢宁波; 徐晓辉
Original assignee: Yada Pipeline System Co ltd
Current assignee: Zhejiang Yada Green Energy Technology Co ltd
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2020-06-09
Anticipated expiration: 2029-07-15

Abstract

The utility model discloses an inflatable malleation inertization gas double-wall pipe, including inner tube and outer tube, the outer tube housing is in the inner tube outside, is provided with the inside and outside pipe between inner tube and the outer tube and supports, vacuole formation between inner tube and the outer tube, towards inert gas in the cavity, be provided with tonifying qi mouth and seat of taking a breath on the outer tube, still be provided with the pressure sensor who extends to the cavity on the outer tube, the utility model discloses a fill inert gas (like N in the cavity of sealed double-wall pipe (the cavity of sealed double-wall pipe)₂) (ii) a The pressure of the cavity is detected, and when the cavity leaks, the change of the pressure of the cavity can be obtained through a sensor; can be found by the working personnel in time and also can be found by the working personnelThe potential for safety accidents is reduced.

Description

Inflatable positive pressure inerting gas double-wall pipe

Technical Field

The utility model belongs to double-walled pipe field, more specifically the utility model relates to an inflatable malleation inertization gas double-walled pipe that says so.

Background

A fuel gas conveying pipeline exists in a fuel storage and supply system of a ship fuel gas main engine. At present, aiming at the pipeline of the flammable gas grade, a stainless steel pipe is generally adopted for conveying in a ventilation pipeline, and the method has a plurality of problems, such as large occupied space of the pipeline and extremely difficult maintenance of the pipeline; in addition, a double-layer pipeline (also called a double-wall pipe) is used for conveying media, and the pipeline is monitored by air draft between the two layers of pipelines.

The invention discloses a continuous vacuum heat-insulation double-wall pipe, which comprises a plurality of sections of inner pipes and a plurality of sections of outer pipes, wherein the outer pipes are sleeved outside the inner pipes, two adjacent inner pipes are welded, a half pipe is welded between two adjacent outer pipes, a plurality of groups of heat-insulation sliding supports and a plurality of groups of heat-insulation fixed supports are arranged between the inner pipes and the outer pipes. The outer tube is provided with a vacuumizing joint, a pressure detection joint and a safety rupture disk, and the outer tube is vacuumized by a cavity formed between the inner tube and the outer tube to achieve the heat insulation function according to the attached drawings.

However, when a vacuum is formed between the inner pipe and the outer pipe, the inner pipe and the outer pipe are simultaneously subjected to a large pressure, that is, the pressure of the inner pipe and the outer pipe to the adiabatic sliding support is large, the sliding resistance of the inner pipe and the outer pipe at the adiabatic sliding support is increased, and the capability of resisting vibration is reduced.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a novel double-wall pipe, which fills inert gas (such as N) into the cavity of the sealed double-wall pipe₂) (ii) a The pressure of the cavity is detected, and when the cavity leaks, the change of the pressure of the cavity can be obtained through a sensor; can be found by workers in time, and reduces the potential possibility of safety accidents.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides an inflatable malleation inertization gas double-walled pipe, includes inner tube and outer tube, and the outer tube housing is in the inner tube outside, is provided with the interior outer tube between inner tube and the outer tube and supports, forms the cavity between inner tube and the outer tube, it has inert gas to dash in the cavity, be provided with the tonifying qi mouth on the outer tube and take a breath the seat, still be provided with the pressure sensor who extends to the cavity on the outer tube.

The further double-wall pipe comprises a plurality of sections which are mutually connected, and cavities between the sections are mutually independent.

And a plurality of sealing supports are arranged between the inner pipe and the outer pipe and divide the cavity into a plurality of sealing supports.

And the air supplementing port and the air exchange seat are respectively positioned at two ends of each cavity.

Further, the pressure sensor is connected with an audible and visual alarm.

The inert gas is nitrogen.

Compared with the prior art, the beneficial effects of the utility model are that: by filling inert gas into the cavity between the inner pipe and the outer pipe, firstly, the inert gas (nitrogen) can achieve good heat insulation effect so as to avoid the influence of external conditions on the gas in the inner pipe; the inert gas forms positive pressure in the cavity, the pressure can be reduced greatly relative to the atmospheric pressure, only a little higher than the atmospheric pressure is needed, the pressure sensor can detect the pressure reduction when leakage occurs, the pressure of the inner pipe and the pressure of the outer pipe are greatly reduced, meanwhile, for the use in a vibration environment, the inner pipe support and the outer pipe support are usually sliding supports, the pressure of the inner pipe and the pressure of the outer pipe are smaller, and the resistance is reduced, so that the sliding of the inner pipe and the outer pipe is facilitated; when the inner tube is leaked, the positive pressure inert gas in the cavity can prevent the gas in the inner tube from rapidly entering the cavity, and the worker can close the gas transmission of the inner tube within enough time to prevent accidents.

Drawings

FIG. 1 is a front view of the gas-filled positive pressure inerting gas double-wall pipe of the present invention;

FIG. 2 is a top view of the gas-filled positive pressure inerting gas double-wall pipe of the present invention;

fig. 3 is a side view of the inflatable positive pressure inerting gas double-wall pipe of the present invention.

Reference numerals: 1. an inner tube; 2. an outer tube; 3. supporting the inner pipe and the outer pipe; 4. an air supplement port; 5. a pressure sensor; 6. a ventilation seat.

Detailed Description

The embodiment of the present invention of the inflatable positive pressure inerting gas double-wall pipe is further described with reference to fig. 1 to 3.

In the description of the present invention, it should be noted that, for the orientation words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and the positional relationship are indicated based on the orientation or the positional relationship shown in the drawings, and the description is only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or the element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and "a plurality" or "a plurality" in the description of the invention means two or more unless a specific definition is explicitly provided.

The utility model provides an inflatable malleation inertization gas double-walled pipe, includes inner tube 1 and outer tube 2, and outer tube 2 cover is in the 1 outside of inner tube, is provided with interior outer tube between inner tube 1 and the outer tube 2 and supports 3, forms the cavity between inner tube 1 and the outer tube 2, it has inert gas to dash in the cavity, be provided with tonifying qi mouth 4 and seat 6 of taking a breath on the outer tube 2, still be provided with the pressure sensor 5 that extends to the cavity on the outer tube 2.

The preferred inert gas in this embodiment is nitrogen, which is low in cost and convenient to use.

The cavity in the double-wall pipe is a closed cavity, before the double-wall pipe is used, nitrogen is filled into the cavity through the air supplementing port 4, the air exchange seat 6 is opened at the same time, the air in the cavity is discharged, after all the air is discharged, the air exchange seat 6 is closed, the nitrogen is continuously filled, the pressure sensor 5 is observed, and the nitrogen in the cavity reaches the required positive pressure.

In this embodiment, the air exchanging seat 6 is an air exchanging port, and a sealing plug or a sealing cover which can be opened is additionally arranged on the air exchanging port.

The inner pipe 1 is used for transmitting fuel gas which is flammable and explosive dangerous gas and is isolated from the outside through inert gas, so that the temperature of the outer environment cannot be influenced.

When the breakage is revealed taking place at

outer tube

2, 5 pressures of pressure sensor will descend, connect audible-visual annunciator or with pressure sensor 5 or connect in the computer of control room, the staff alright in time discover to close the gas transmission in order to prevent unexpected, repair the breakage and reveal the department, inert gas in the cavity reveals gradually this moment, when pressure is the same with atmospheric pressure, will slow and exchange (diffusion) with the air, the air can not be full of the cavity immediately promptly, inert gas in the cavity still can keep the long time that separates the temperature.

When the breakage takes place at inner tube 1 and reveals, with outer tube 2 breakage time cavity inert gas state the same basically, only inert gas will get into in inner tube 1 and mix with the gas, until cavity internal pressure is the same with inner tube 1 pressure, the gas just can slowly get into cavity (diffusion) this moment, the gas can not get into immediately and be full of the cavity promptly, inert gas in the cavity still can keep separating the temperature for a long time, give staff sufficient reaction action time, avoid unexpected emergence greatly.

The preferred double-walled pipe of this embodiment includes several sections, interconnect between the several sections, and the cavity between the several sections is independent each other.

Or a plurality of sealing supports are arranged between the inner pipe 1 and the outer pipe 2, and the sealing supports divide the cavity into a plurality of cavities.

That is to say when double-walled pipe is too long, cut apart into a plurality of sections with the cavity of whole double-walled pipe and monitor respectively, the staff can find damaged position rapidly through corresponding pressure sensor 5.

The air supplementing port 4 and the air exchanging seat 6 are preferably located at two ends of each cavity respectively, and when the inert gas replaces the air in the cavity, one end of the inert gas is filled with the inert gas, and the other end of the inert gas is discharged, so that the replacement efficiency is increased, and the air in the cavity is completely discharged.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an inflatable malleation inertization gas double-wall pipe, includes inner tube and outer tube, and the outer tube housing is in the inner tube outside, is provided with inside and outside pipe between inner tube and the outer tube and supports, forms cavity, its characterized in that between inner tube and the outer tube: inert gas is filled in the cavity, the outer tube is provided with an air supplementing port and an air exchange seat, and the outer tube is also provided with a pressure sensor extending to the cavity.

2. The inflatable positive pressure inerted gas double-walled tube of claim 1, wherein: the double-wall pipe comprises a plurality of sections which are mutually connected, and cavities between the sections are mutually independent.

3. The inflatable positive pressure inerted gas double-walled tube of claim 1, wherein: a plurality of sealing supports are arranged between the inner pipe and the outer pipe and divide the cavity into a plurality of sealing supports.

4. The inflatable positive pressure inerted gas double-walled tube of claim 2 or 3, wherein: the air supplementing port and the air exchange seat are respectively positioned at two ends of each cavity.

5. The gas-filled positive pressure inerted gas double-walled tube of claim 1, 2 or 3, wherein: the pressure sensor is connected with an audible and visual alarm.

6. The inflatable positive pressure inerted gas double-walled tube of claim 1, wherein: the inert gas is nitrogen.