CN212710862U

CN212710862U - Flexible floating disc and inner floating roof storage tank

Info

Publication number: CN212710862U
Application number: CN202020222814.0U
Authority: CN
Inventors: 张健民; 初阳
Original assignee: CNPC Northeast Refining and Chemical Engineering Co Ltd
Current assignee: CNPC Northeast Refining and Chemical Engineering Co Ltd
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2021-03-16
Anticipated expiration: 2030-02-27

Abstract

The utility model relates to a normal pressure oil storage tank floating plate technical field specifically is a flexible floating plate and interior floating roof storage tank. The floating disc comprises a film and a steel inner ring, the outer edge of the film is fixed in the steel inner ring, and the steel inner ring is fixed on the inner wall of the oil storage tank. The film material has the characteristics of oil resistance, corrosion resistance, flame retardance, deformation, good toughness, high strength, air impermeability and the like, floats on the surface of an oil body, eliminates the volatilization space of oil gas, is tightly attached to the oil body, does not need an additional supporting structure and a floating structure, does not need a complex sealing structure, freely floats along with the lifting of an oil product, and has the advantages of simple structure, convenience in manufacturing and installation, easiness in maintenance and good sealing effect.

Description

Flexible floating disc and inner floating roof storage tank

Technical Field

The utility model relates to a normal pressure oil storage tank floating plate technical field specifically is a novel flexible floating plate that relates to interior floating roof storage tank.

Background

The ordinary pressure oil storage tank generally can be divided into fixed top jar and 2 types of floating roof jar, and wherein, floating roof jar includes 2 types of jar types of interior floating roof jar and outer floating roof jar again, reduces jar oil storage article through installing the floating plate additional and volatilizees, consequently, the floating plate technique is the key technology that reduces jar interior oil loss, guarantee oil storage safety. At present, the internal floating disk type adopted by the normal pressure oil product storage tank, in particular to an internal floating roof storage tank, can be roughly divided into 4 types: open bay type floating plate, single-disc type floating plate, double-disc type floating plate and float-type floating plate, the brief description is as follows:

open bay type floating plate: an annular open bay is arranged around the floating disc, the bay plays a role of floating force, the middle part is a single-layer disc plate,

the material is usually steel, the tray deck is in contact with the stored liquid, and the floating tray is not provided with drainage means.

Single-deck floating plate: a plurality of annular sealed cabins are arranged around the floating disc, a single-layer disc plate is arranged in the middle of the floating disc, the floating disc is usually made of steel, the disc plate is in contact with stored liquid, and a drainage facility is not arranged on the floating disc.

Double-disc floating disc: the entire float is made up of sealed compartments, usually of steel, which are in contact with the stored liquid, and which are provided with drainage means.

A float-type floating disc: be equipped with a plurality of flotation pontoons below the floating plate, the flotation pontoon floats on liquid, the floating plate not with liquid direct contact, because there is gaseous phase space between floating plate and the liquid, lead to storage liquid to change to volatilize and reveal.

The 4 kinds of floating plates are made of steel, aluminum, reinforced polyester, rigid foam plastic, various composite materials and the like, and can be regarded as rigid floating plates because the floating plates cannot deform. Due to the limitation of manufacturing types and materials, the supporting structure, the floating structure, the sealing structure and the like of the floating plate need to be considered, and the problems of complex structure, inconvenience in installation, easiness in clamping and sinking the plate, difficulty in maintenance, poor sealing effect and the like exist.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects existing in the prior art, the utility model aims to provide a novel flexible floating plate.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a flexible floating plate, floating plate includes film and inner circle, the film outer fringe is fixed in the inner circle, the inner circle is fixed at used oil storage tank inner wall.

In the above technical solution, further, the film is a single-layer film or a multilayer film.

In the above technical solution, further, the multilayer film is formed by compounding multiple layers of high molecular materials.

In the above technical solution, the polymer material is one or more of a flame retardant material and Polyethylene (PE), High Density Polyethylene (HDPE), Polyamide (PA), and ethylene/vinyl alcohol copolymer (EVOH).

In the above technical solution, further, the film is a monolithic film or a plurality of films spliced together.

In the above technical solution, further, the density of the film material is less than the density of the liquid to be stored, so that the film floats on the liquid.

In the technical scheme, furthermore, the film material is oil-resistant, corrosion-resistant, flame-retardant, deformable, good in toughness, high in strength and air-tight.

In the above technical solution, further, the inner ring is a steel inner ring.

The invention provides an inner floating roof storage tank which comprises the flexible floating plate.

In the above technical solution, further, the inner floating roof tank includes a tank body, a vent hole, an oil measuring pipe, and a manhole; the air vent sets up at jar body top, and the manhole setting is in jar body lower part, flexible floating plate is fixed in jar internal middle part, flexible floating plate is passed to buret one end, and the other end is fixed in jar body top.

The utility model has the advantages that: different from the existing hard floating plate, the flexible floating plate of the invention floats on the surface of the oil body, eliminates the oil gas volatilization space, is tightly attached to the oil body, does not need an additional supporting structure and a floating structure, does not need a complex sealing structure, freely floats along with the lifting of the oil product, and has simple structure, convenient manufacture and installation, easy maintenance and good sealing effect.

Drawings

FIG. 1 is a schematic view of the structure of the flexible floating plate of the present invention;

FIG. 2 is a schematic view of the operation of the flexible floating plate of the present invention when the oil product is at a low position;

FIG. 3 is a schematic view of the operation of the flexible floating plate of the present invention when the oil product is at a high position;

in the figure: 1-a manhole; 2-tank body; 3-a vent hole; 4-a film; 5-oil measuring pipe; 6-inner circle.

Detailed Description

The invention will be further described with reference to the following specific examples, which are not intended to limit the invention in any way.

Example 1

As shown in figure 1, the flexible floating plate of the utility model comprises a film 4 and a steel inner ring 6, the steel inner ring 6 is welded on the inner wall of the tank body 2, the position is suitable for the middle part of the tank body 2, the density of the film is less than the density of the liquid to be stored, so that the film floats on the liquid, the film material should be oil-proof, corrosion-resistant, flame-retardant, deformable, good in toughness, high in strength and airtight, the film 4 in the embodiment is formed by compositely processing seven layers of films of PE/flame-retardant fiber/nylon/EVOH/nylon/flame-retardant fiber/PE, the film is tightly pressed into the inner ring through a plastic pressing strip, so that the film is fixed in the steel inner ring on the inner wall of the tank body, one end of a measuring pipe 5 is fixed at the top of the tank body, the other end of the, the film 4 was pressed into the steel inner ring of the metering tube in the same manner and fixed at 10000m³Taking a normal-pressure inner floating roof storage tank (the diameter of the tank body of the storage tank is phi 31000, the height of the tank body is 14580 and the total height of tank equipment is 17948) as an example, the diameter of a film is phi 50000, the film is fixed at the middle position of the inner wall of the tank body of the storage tank through a steel inner ring on the inner wall of the tank body and is about 7500 away from the bottom of the tank, when oil in the tank body is conveyed outwards, the liquid level of the oil is gradually reduced, the film of a flexible floating disc is also reduced along with the liquid level and is tightly attached to the liquidAnd (3) putting the mixture into the tank to balance the internal and external pressure of the tank body of the storage tank, as shown in figure 2. When the storage tank starts to collect oil, the liquid level of oil in the tank body gradually rises, the film of the flexible floating plate also rises along with the liquid level and is tightly attached to the liquid level, and air outside the tank is discharged out of the tank through the tank top vent hole 3 to balance the pressure inside and outside the storage tank, as shown in fig. 3. The maintainer accessible tank bottoms manhole 1 gets into the inside maintenance operation that carries out of storage tank.

Through above-mentioned technical scheme, novel flexible floating plate can float in oil liquid level top to closely laminate with the liquid level, thoroughly eliminate oil gas and volatilize the space, simultaneously, owing to do not have floating plate bearing structure, floating structure, seal structure etc. fundamentally has solved current floating plate structure complicacy, the installation is inconvenient, easy chuck sink, the maintenance is difficult, sealed effect subalternation problem.

It will be apparent to those skilled in the art from this disclosure that many changes and modifications can be made, or equivalents modified, in the embodiments of the invention without departing from the scope of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims

1. The flexible floating disc is characterized by comprising a film and an inner ring, wherein the outer edge of the film is fixed in the inner ring, the inner ring is fixed on the inner wall of a used oil storage tank, and an oil measuring pipe penetrates through the film.

2. The flexible float of claim 1 wherein said film is a single layer film or a multilayer film.

3. The flexible floating disk as claimed in claim 2, wherein the multi-layer film is formed by compounding multiple layers of polymer materials.

4. The flexible floating disc according to claim 3, wherein the polymer material is a flame retardant material and one or more of PE, HDPE, PA, EVOH.

5. The flexible buoyant disc of claim 1 wherein said membrane is a monolithic membrane or a splice of multiple membranes.

6. The flexible floating platform according to claim 1, wherein the membrane material has a density less than the density of the liquid to be stored, such that the membrane floats on the liquid.

7. The flexible buoyant disc of claim 1 wherein the inner ring is a steel inner ring.

8. An internal floating roof tank, characterized in that it comprises a flexible floating tray according to claim 1.

9. The inner floating roof tank of claim 8, comprising a tank body, a vent, a dip pipe, a manhole; the air vent sets up at jar body top, and the manhole setting is in jar body lower part, flexible floating plate is fixed in jar internal middle part, flexible floating plate is passed to buret one end, and the other end is fixed in jar body top.