CN209839690U

CN209839690U - Liquid phase pressure tapping pipeline of low-temperature liquid storage and transportation equipment

Info

Publication number: CN209839690U
Application number: CN201920599625.2U
Authority: CN
Inventors: 崔闻天; 张娟; 杨利芬; 李桂苓; 秦瑞
Original assignee: Emerging Energy Equipment Co Ltd
Current assignee: Emerging Energy Equipment Co Ltd; Xinxing Energy Equipment Co Ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2019-12-24
Anticipated expiration: 2029-04-29

Abstract

This technical scheme provides a low temperature liquid warehousing and transportation equipment liquid phase pressure tapping pipeline, includes: the pressure measuring pipe comprises a pressure measuring inner pipe, a transition joint, an interlayer pressure measuring pipe, a plurality of layers of heat insulating paper and a copper wire; the pressure taking inner tube is arranged in an inner container shell consisting of an inner container barrel and an inner container end enclosure and is connected with an interlayer pressure taking tube through a transition joint arranged at the lower part of the inner container end enclosure, one end of the interlayer pressure taking tube is connected with the pressure taking inner tube through the transition joint, and the other end of the interlayer pressure taking tube is connected with a prepressing original outside the container through the outer container; the technical scheme integrally solves the problems of unstable pressure, inaccurate liquid level display, difficult processing, complex manufacturing process, high cost and the like of the pressure measuring device caused by the fact that the pressure measuring device is immersed in low-temperature liquefied gas through the design of coating, heat preservation and heat conduction vaporization, and is simple in method, low in cost, convenient to operate and suitable for underwater pressure measurement of low-temperature liquid storage and transportation equipment.

Description

Liquid phase pressure tapping pipeline of low-temperature liquid storage and transportation equipment

Technical Field

The technical scheme is suitable for the field of liquid phase pressure taking of low-temperature liquid storage and transportation equipment, and particularly provides a liquid phase pressure taking pipeline for a high-vacuum multilayer heat-insulating storage tank.

Background

The vacuum multilayer heat-insulation storage tank generally uses a differential pressure liquid level meter to measure the liquid level, a liquid phase pipeline of the liquid level meter needs to convert low-temperature liquid at the bottom of the tank body into normal-temperature gas-phase medium, and the pressure difference value between the pressure of the gas-phase medium and the gas-phase space of the tank body is the liquid column static pressure in the tank body, so that the liquid level of the liquid in the tank is reflected. However, the liquid pressure sampling device of the currently used liquid level meter is often arranged inside the inner container tank body, and the gasification pipeline connected with the liquid pressure sampling device is also arranged inside the inner container. On one hand, the pressure sampling device adopts a small hole structure, so that the processing is difficult, the manufacturing process is complex, and the cost is high; on the other hand, the pressure measuring device and the pipeline are immersed in a low-temperature liquid environment, so that the gasified gas is liquefied again to cause unstable liquid level display, and even the gas-liquid phase balance plane cannot be located at the bottom end of the tank body as expected, so that the liquid level display is inaccurate.

Disclosure of Invention

In order to solve the technical problem, the technical scheme provides an interlayer liquid phase pressure tapping pipeline for a vacuum multilayer heat insulation storage tank. The device is suitable for the use of the liquid pressure under low-temperature liquefied gas low-temperature equipment.

The technical scheme comprises the following steps: the pressure measuring pipe comprises a pressure measuring inner pipe (3), a transition joint (4), an interlayer pressure measuring pipe (5), a plurality of layers of heat insulating paper (6) and a copper wire (8);

the pressure taking inner tube (3) is arranged in an inner container shell consisting of an inner container barrel (1) and an inner container end socket (2), preferably at a position 3-8mm away from the bottom of the inner container shell, and can keep the interlayer pressure taking tube (5) communicated under the condition that the inner container shell has liquid, namely the pressure of the same height position filled with the liquid is equal;

the outlet of the pressure-taking inner pipe (3) is connected with an interlayer pressure-taking pipe (5) through a transition joint (4) arranged at the lower part of the inner container end socket (2);

intermediate layer pressure pipe (5) one end is connected with pressure pipe (3) through transition joint (4) and pressure, and the other end links with the outside pre-compaction original paper of container through outer container (7) and links, includes: a bent pipe (5-1) close to the inner container, a horizontal pipe section (5-2), an ascending pipe section (5-3) and a spiral pipe section (5-4);

the bent pipe (5-1) and the horizontal pipe section (5-2) close to the inner container are insulated by coating a plurality of layers of heat insulation paper (6), so that the low-temperature liquefied gas in the bent pipe can be kept from being gasified;

the ascending pipe section (5-3) and the spiral pipe section (5-4) are not coated, and copper wires (8) are wound for heat dissipation, so that the low-temperature liquefied gas starts to be gasified until the liquid in the ascending pipe section (5-3) is completely gasified.

The copper wire (8) is mainly wound on the outer sides of the riser section (5-3) and the spiral pipe section (5-4), the end part of the copper wire is connected with the outer container (7) and used for conducting the temperature of the outer container to the riser section (5-3) and the spiral pipe section (5-4) and enabling low-temperature liquefied gas in the pipe sections to start to be gasified.

The technical effect of the technical scheme is that

Through the design of first coating, heat preservation and then heat conduction and vaporization, the problems of unstable pressure, inaccurate liquid level display, difficult processing, complex manufacturing process, high cost and the like of the pressure sampler caused by being soaked in low-temperature liquefied gas are solved.

Be the spiral pipe section behind the rising pipe section, the spiral pipe section can improve the gaseous temperature of gasification on the one hand, prevents that the low temperature that crosses from causing the damage to the level gauge, and the impact of on the other hand gasification gas to the level gauge protects the level gauge.

Drawings

FIG. 1 is a schematic view of the main structure of the present invention;

fig. 2 is the right side view of the main structure of the utility model:

the heat insulation structure comprises an inner container barrel 1, an inner container end socket 2, a pressure taking inner tube 3, a transition joint 4, an interlayer pressure taking tube 5, a bent tube 5-1 close to the inner container, a horizontal tube 5-2, an ascending tube 5-3, a spiral tube 5-4, multiple layers of heat insulation paper 6, an outer container 7 and a copper wire 8.

Detailed Description

This technical scheme discloses a press pipe is got to intermediate layer liquid phase, and the concrete implementation mode is:

the pressure taking inner tube (3) is arranged in an inner container shell consisting of an inner container barrel (1) and an inner container end socket (2), a liquid inlet of the pressure taking inner tube (3) is arranged at a position 3-8mm away from the bottom of the inner container shell, and an outlet is connected with an interlayer pressure taking tube (5) through a transition joint (4).

The interlayer pressure tapping pipe (5) is close to the bent pipe (5-1) and the horizontal pipe section (5-2) of the inner container and is coated with the multi-layer heat insulation paper (6) for heat preservation, the ascending pipe section (5-3) and the spiral pipe section (5-4) are not coated, a copper wire (8) is wound from the bottom of the ascending pipe section (5-3), and the outlet of the interlayer pressure tapping pipe (5) extends out of the outer container (7).

When the device is implemented, the low-temperature liquefied gas enters the pressure-taking inner pipe (3) and enters the interlayer pressure-taking pipe (5) through the transition joint (4).

Because the distance between the pressure taking inner tube (3) and the bottom of the inner container shell is close, the interlayer pressure taking tube (5) can be kept communicated under the condition that the inner container shell contains liquid, namely the pressure of the same height position filled with the liquid is equal.

The horizontal pipe section (5-2) of the interlayer pressure taking pipe (5) and the bent pipe (5-1) close to the inner container are coated with multiple layers of heat insulation paper (6), so that low-temperature liquefied gas in the interlayer pressure taking pipe can be kept from being gasified, the later ascending pipe section (5-3) is not coated with multiple layers of heat insulation paper and is wound with copper wires (8), therefore, the low-temperature liquefied gas starts to be gasified until the liquid in the ascending pipe section (5-3) is completely gasified, the gas-liquid balance surface is above the horizontal pipe section (5-2), and the pressure of the gas is equal to the pressure at the bottom of the inner container tank body according to the principle that the pressure of a communication pipeline is equal.

The spiral pipe section (5-4) is arranged behind the ascending pipe section (5-3), the spiral pipe section (5-4) can improve the temperature of gasified gas on one hand, prevent the liquid level meter from being damaged by too low temperature, and on the other hand, the gasified gas can impact the liquid level meter to protect the liquid level meter.

The diameter specification of the interlayer pressure sampling pipe (5) is not more than phi 8 multiplied by 1, and the small-pipe-diameter connecting pipe is beneficial to reducing the liquid amount needing to be gasified in the pipe and keeping the stability of the display data of the liquid level meter.

The terminology used herein is for the purpose of description and illustration, rather than of limitation. As the present solution may be embodied in several forms without departing from the spirit or essential characteristics of the invention, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A liquid phase pressure tapping pipeline of low-temperature liquid storage and transportation equipment is characterized in that: comprises a pressure sampling inner pipe (3), a transition joint (4), an interlayer pressure sampling pipe (5), a plurality of layers of heat-insulating paper (6) and a copper wire (8); the interlayer pressure tapping pipe (5) comprises: a bent pipe (5-1) close to the inner container, a horizontal pipe section (5-2), an ascending pipe section (5-3) and a spiral pipe section (5-4); the elbow pipe (5-1) and the horizontal pipe section (5-2) close to the inner container are coated with a plurality of layers of heat insulation paper (6); the ascending pipe section (5-3) and the spiral pipe section (5-4) are not coated and are wound by a copper wire (8), and the end part of the copper wire (8) is connected with the outer cylinder.

2. The pressure tapping line of claim 1, wherein: the pressure taking inner tube (3) is arranged in an inner container shell consisting of an inner container barrel (1) and an inner container end socket (2), and a liquid inlet of the pressure taking inner tube (3) is arranged at a position 3-8mm away from the bottom of the inner container shell.

3. The pressure tapping line of claim 1, wherein: the diameter specification of the interlayer pressure sampling pipe (5) is not more than phi 8 multiplied by 1.