CN209927233U

CN209927233U - Liquid level measuring device with breather valve for internal floating roof tank

Info

Publication number: CN209927233U
Application number: CN201920823333.2U
Authority: CN
Inventors: 任纪翔
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-03
Filing date: 2019-06-03
Publication date: 2020-01-10
Anticipated expiration: 2029-06-03

Abstract

The utility model discloses a take internal floating roof jar liquid level measurement device of breather valve, include: jar body, floating disc, stand pipe, base, radar level gauge, connecting pipe, back-fire relief breathing fire prevention valve, the internal portion of jar be equipped with the oil, the floating disc activity set up at internal portion of jar, and the floating disc floats at the liquid level of oil, the floating disc is divided into gaseous phase region under the internal floating roof jar vault with jar body space and liquid phase region under the internal floating roof jar floating disc, the base rigid coupling in jar body bottom, the stand pipe rigid coupling on the base, and the stand pipe passes floating disc and jar body top from bottom to top in proper order, the radar level gauge install the top at the stand pipe, the connecting pipe switch on the upper end to the side of stand pipe, back-fire relief breathing fire prevention valve install the top at the connecting pipe, the stand pipe lower extreme open and have the through-hole, the through-hole all open in the stand pipe both sides and have the oil. The utility model has the advantages of simple structure, good reliability, high measurement accuracy, good use effect and the like.

Description

Liquid level measuring device with breather valve for internal floating roof tank

Technical Field

The utility model relates to a petrochemical auxiliary assembly technical field specifically is a take internal floating roof jar liquid level measurement device of breather valve.

Background

In the petrochemical industry, the storage of oil products generally considers the adoption of a vault tank, an inner floating roof tank and a pressure ball tank. The inner floating roof storage tank is a floating roof tank with a tank roof and is a novel storage tank combining a vault tank and a floating roof tank, the vault is arranged outside the inner floating roof storage tank, and the floating roof is arranged inside the inner floating roof storage tank. The floating plate floats on the liquid surface, the oil liquid in the storage tank has no steam space, the evaporation loss is reduced by 85-96%, the air pollution and the fire explosion danger are reduced, large-area combustion cannot be caused even if a fire disaster occurs, the quality of the stored liquid is easy to ensure, and the storage tank is particularly suitable for storing high-grade gasoline, jet fuel and toxic petrochemical products. The inner floating roof tank has large volume, and has very high requirements on the measurement precision and the measurement resolution ratio of the liquid level because the inner floating roof tank is used for storing the product oil. In the existing liquid level measurement technology of an internal floating roof storage tank, a radar liquid level meter is mostly adopted. In the practical application process, the liquid level measurement of the radar liquid level meter has two methods, one method is that a fixed reflecting plate is arranged on a floating disc, radar waves transmitted by the radar liquid level meter arranged on an arch crown return after encountering the reflecting plate, the distance is calculated by measuring the time of transmitting and receiving the radar waves, the method has very high requirement on the levelness of the floating disc, and once the floating disc is clamped or inclined at a small angle in the up-and-down moving process, the measurement precision is reduced. The method is characterized in that a radar liquid level meter is arranged at the top end of a hollow guide pipe of a floating top, the guide pipe is a guide rod used for the up-and-down movement of a floating disc and is also an installation pipe of the radar liquid level meter, liquid medium in the guide pipe enters the guide pipe through a communicating hole, the liquid level height in the guide pipe, namely the liquid level height in the tank, is measured by utilizing the measurement principle of a communicating pipe.

Disclosure of Invention

An object of the utility model is to provide a take internal floating roof jar liquid level measurement device of breather valve to solve the problem that provides among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: an internal floating roof tank liquid level measuring device with a breather valve comprises: jar body, floating disc, stand pipe, base, radar level gauge, connecting pipe, fire-retardant relief breather valve, the jar body be the sealed jar body, the internal portion of jar is equipped with the oil, the floating disc activity set up in the internal portion of jar, and the floating disc floats at the liquid level of oil, the floating disc is gaseous phase region under jar vault and the liquid phase region under the jar vault of interior floating roof jar with jar body space divide into, the base rigid coupling in jar body bottom, the stand pipe rigid coupling on the base, and the stand pipe passes floating disc and jar body top from bottom to top in proper order, the radar level gauge install the top at the stand pipe, the connecting pipe switch-on the upper end of stand pipe side, fire-retardant relief breather valve install the top at the connecting pipe.

Furthermore, the lower end of the guide pipe is provided with a through hole, and the through hole is formed in the two sides of the guide pipe.

Furthermore, the guide pipe adopts a DN200 seamless steel pipe, which is used as a guide pipe for the up-and-down movement of the floating plate and a communicating pipe for the liquid level measurement of the radar liquid level meter.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the technical problem of inaccurate liquid level measurement caused by the up-and-down operation and inclination of the floating plate in the liquid level measuring method by the reflecting plate is solved;

2. the technical problem that the guide pipe is not allowed to open holes in the whole guide pipe is solved, because the storage medium of the inner floating roof tank is generally volatile liquid, and the floating disc has the function of reducing the evaporation gas of the liquid medium, the holes are not allowed to open in the upper gas phase section of the guide pipe, and the steam in the guide pipe is prevented from leaking to the upper part of the floating disc through the hole opening;

3. the problem of false liquid level in the guide pipe is solved, in order to avoid the production of false liquid level, a fire-retardant breather valve is communicated with the side surface of the top of the guide pipe, the upper gas phase section space of the guide pipe is isolated from the atmosphere within a certain pressure range, and can be communicated with the atmosphere (breathing) when the pressure range is exceeded or reduced, the constant pressure of the gas phase section is basically maintained, the gas phase pressure in the guide pipe rises when the liquid level rises, the gas phase pressure in the guide pipe falls when the liquid level falls, the breather valve is opened together with the atmosphere under two working conditions, the constant pressure of the gas phase section is maintained, and meanwhile, the evaporation loss of stored liquid can be reduced.

4. The cost is low, the price of the fire-retardant breather valve which is led out from the side surface of the top is low, and the interchangeability is strong. The utility model has the advantages of simple structure, good reliability, high measurement accuracy, good use effect and the like.

Drawings

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

in the figure: 1-tank body; 2-floating plate; 3-a guide tube; 4-a base; 5-radar level gauge; 6-connecting pipe; 7-fire-retardant breathing fire-proof valve; 8-a through hole; a-a gas phase area below the vault of the inner floating roof tank; b-liquid phase area under the floating plate of the inner floating roof tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the utility model provides an inner floating roof tank liquid level measuring device with breather valve, include: jar body 1, floating disc 2, stand pipe 3, base 4, radar level gauge 5, connecting pipe 6, fire-retardant relief valve 7, jar body 1 for the sealed jar body, the inside oil that is equipped with of jar body 1, 2 activities of floating disc set up in jar internal portion, and floating disc 2 floats at the liquid level of oil, floating disc 2 with jar body space divide into under the top of floating tank vault gaseous phase region an and the top of floating tank floating disc liquid phase region b, 4 rigid couplings of base in jar body 1 bottom, 3 rigid couplings of stand pipe on base 4, and stand pipe 3 passes floating disc 2 and jar body 1 top from bottom to top in proper order, radar level gauge 5 install the top at stand pipe 3, 6 switches on the upper end in the stand pipe 3 sides of connecting pipe, fire-retardant relief valve 7 of breathing valve 7 install on the top of connecting pipe 6.

Furthermore, the lower end of the guide pipe 3 is provided with a through hole 8, and the through hole 8 is formed in both sides of the guide pipe 3.

Furthermore, the guide pipe 3 adopts a DN200 seamless steel pipe, which is used as the guide of the up-and-down movement of the floating plate 2 and is also used as a communicating pipe for the radar liquid level meter 5 to measure the liquid level.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An internal floating roof tank liquid level measuring device with a breather valve comprises: jar body (1), floating plate (2), stand pipe (3), base (4), radar level gauge (5), connecting pipe (6), fire relief breathing fire prevention valve (7), its characterized in that: jar body (1) be the sealed jar body, jar body (1) is inside to be equipped with the oil, floating plate (2) activity set up in jar body (1) inside, and floating plate (2) float at the liquid level of oil, floating plate (2) divide into jar body space under the top of floating tank vault gaseous phase region an and the top of floating tank floating plate liquid phase region b down, base (4) rigid coupling in jar body (1) bottom, stand pipe (3) rigid coupling on base (4), and stand pipe (3) pass floating plate (2) and jar body (1) top from bottom to top in proper order, radar level gauge (5) install the top in stand pipe (3), connecting pipe (6) put through the upper end in stand pipe (3) side, back-fire relief breathing fire prevention valve (7) install the top at connecting pipe (6).

2. The internal floating roof tank liquid level measuring device with the breather valve as recited in claim 1, characterized in that: the lower end of the guide pipe (3) is provided with a through hole (8), and the through hole (8) is formed in both sides of the guide pipe (3).

3. The internal floating roof tank liquid level measuring device with the breather valve as recited in claim 1, characterized in that: the guide pipe (3) adopts a DN200 seamless steel pipe, which is used as the guide of the up-and-down movement of the floating plate (2) and also used as a communicating pipe of the radar liquid level meter (5) for measuring the liquid level.