CN2832728Y - Monolayer film type flexible floating roof - Google Patents

Abstract

The utility model discloses a monolayer film type flexible floating roof which is composed of one layer of monolayer film. The circumference of the monolayer film is provided with a flexible sealing strip which is cut and processed into a strip-shaped structure by the monolayer film and is connected with the monolayer film into a whole. Film quality materials of the monolayer film are made of organic polymer materials with the characteristics of strong ability for preventing water, small density, strong corrosion resistance and good ductility. The utility model has the advantages of simple structure, no assembly part, strong adaptability for a liquid storage device, high covering efficiency, small friction between the floating roof and an inner wall of the device, and convenient repair and maintenance. The utility model is suitable for the sealing for water and solutions with strong corrosiveness and volatility.

Description

The flexible floating top of individual layer membrane type

Technical field

The utility model relates to a kind of individual layer flexible sealing that is used to cover liquid level device in the storage liquid plant, relates in particular to the flexible floating top of a kind of individual layer membrane type.

Background technology

In the liquid bunkerage, the two-phase mass exchange takes place for preventing and reducing the gas-liquid two-phase interface, reduce the air loss of liquid, usually float on liquid surface at an inner what is called " floating top " device of installing of bunkerage, two-phase medium is isolated, thereby reach the purpose that stops and reduce the two-phase mass exchange.

The floating top of a kind of flexibility (patent No. is ZL94238198.x) is disclosed in " Chinese utility model patent communique ".Should comprise sir-tight flexible membrane, upper press ring, following pressure ring, floating ring, base pressure ring in floating top, and the seal ring that is used for seal perimeter, flexible membrane and seal ring have bolt to pass all ring bodies and flexible membrane between upper press ring and following pressure ring, and they are connected into integral body.In addition, the lower wall surface at flexible membrane is provided with some floating blocks.An integral body of Gou Chenging is floating like this pushes up, and its global density is used to cover liquid levels less than being capped density of liquid, has basic coverage effect.But have following shortcoming, one be to use a period of time after because the floating ring that is in bolt pretension state under easily produces distortion, cause bolt loosening even come off in mating holes, the faying face of upper and lower pressure ring and flexible membrane is loosening, floats and pushes up even stride the disintegration of collapsing; The 2nd, because some floating blocks become the multi-point state to hold up flexible membrane, face is higher than liquid level, between film and liquid level, exist air cavity to form indirect covering state, when film or other parts generation leakage, have more serious gas-liquid exchange phenomenon at the liquid level place and reduce isolation effect.Thereby the floating top of this membrane type exists that coverage effect is not good, the shortcoming of unstable properties.Disclosed another kind is used to cover the flexible floating top of membrane type of liquid level (patent No. is: ZL99233384.9) in " Chinese utility model patent communique ", it is made up of sir-tight flexible membrane, upper press ring, following pressure ring, floating ring and seal ring, flexible membrane is between upper press ring and following pressure ring, connect into integral body by bolt or screw, floating ring is connected in down pressure ring, seal ring is positioned between upper and lower pressure ring, flexible membrane directly covers liquid levels, replaced floating block with floating ring, and cancelled the base pressure ring, it has improved liquid level and has covered efficient and cover stability.But show that through application in practice there is following shortcoming in it: the one, it only is applicable to the round and square liquid bunkerage of vertical type, is not suitable for ball-type and horizontal column type equipment; The 2nd, whole floating top needs to connect by bolt or screw, and bolt or the intensity of screw own that plastic material is made are limited, and also limited with the fastening degree of pressure ring spare, after operation after a while, loosening or phenomenon of rupture takes place easily.If adopt metal bolts or screw, when storage liquid had certain corrosive property, corrosion easily took place, both influenced the stability on floating top, may pollute the liquid of storage again.The 3rd, because its shape and size are fixing, for adopting joint welding but not large-scale bunkerage and inner wall shape fitfull equipment that butt welding is made, easily generating unit divides the floating top of liquid level not cover or floating top bite and tear phenomenon.The 4th, for reaching the total contact of face and liquid level, before the installation, need according to being capped density of liquid, the total quality and the density on the floating top of design calculation.When the liquid situation changes or design deviation occurs, be difficult to reach the total contact requirement of face and liquid level, influence coverage effect.The 5th, during the bunkerage maintenance, need to float the top overall pulling down, adopt many bolts or screw to connect during owing to installation, the floating top after the dismounting is difficult to recover again.The 6th, seal ring has certain intensity, after rubbing for a long time with the equipment inwall, directly influences the service life of inside coating or preservative coat.

Summary of the invention

The purpose of this utility model is: for overcome bunkerage that existing floating top can not adapt to different shape, to the requirement on machining accuracy height of bunkerage, cover stability strong, influence the deficiency that bunkerage overhauls, the utility model provides a kind of individual layer membrane type flexible floating top, it goes for various difform liquid bunkerages such as cylindrical, spherical, square, the flexible contact only takes place with the equipment inwall in floating top, the liquid level covering performance is strong, and maintenance does not produce a bit influence to bunkerage.

The technical scheme that its technical matters that solves the utility model adopts is: whole floating top is made of one deck monofilm.

The utility model is provided with the flexible sealing band around monofilm.

Flexible sealing band described in the utility model processes list structure by monofilm through shearing, and is linked to be an integral body with monofilm.

The high-molecular organic material that the membranous material of monofilm described in the utility model is strong hydrophobic nature, density is little, corrosion stability is strong, ductility is good is made.

The beneficial effects of the utility model are: simple in structure, and no assembly parts, strong to the comformability of storing liquid plant, cover the efficient height, floating top is little with the friction of equipment inwall, and repair and maintenance is convenient, is applicable to the sealing of water, severe corrosive, volatile solvent soln.

Description of drawings

Fig. 1 the utility model embodiment 1 birds-eye view;

Fig. 2 is the A-A profile of Fig. 1;

Fig. 3 is the front view of the utility model embodiment 2;

Fig. 4 is the B-B section-drawing of Fig. 3 when the liquid level area is maximum;

Fig. 5 is the B-B section-drawing of Fig. 3 when liquid level raises;

Fig. 6 is the B-B section-drawing of Fig. 3 when liquid level reduces.

The specific embodiment

Contrasting accompanying drawing below in conjunction with embodiment further specifies the utility model.

Embodiment 1:

Present embodiment is applied to right circular cylinder shape sweet-water tank, water tank diameter 12000mm.Present embodiment is that circular monofilm 1 and the flexible sealing band 2 that is arranged at around the film constitute by shape of cross section, flexible sealing band 2 is through shearing the list structure that processes by monofilm 1, and constitute an integral body with monofilm 1, and process in the equipment installation process, it keeps flexible with bunkerage inwall 4 and contacts.When the liquid level of liquid in the bunkerage 3 rose or descends, flexible sealing band 2 can adapt to the unfairness of the irregular and inwall of device shaped, and the contact shape of automatically regulating and inwall and contact surface have improved covering efficient.The difference on present embodiment and other floating top is simple in structure, and no assembly parts can be regulated automatically according to the variation that is capped liquid surface shape and area, guarantees to cover efficient.

Embodiment 2:

Present embodiment is applied to horizontal cylindrical liquified hydrogen sodium oxide molybdena storagetank, and present embodiment is made of shape of cross section fitfull monofilm 1 and the flexible sealing band 2 that is arranged at around the film, and other structure is with embodiment 1.From Fig. 5, Fig. 6 as can be seen, when liquid level rises or descend, floating top meeting lifting thereupon, deformation can take place with liquid level variation in the shape on floating top automatically, and liquid is formed good covering.The difference on present embodiment and other floating top is that other various floating top can't be applicable to the bunkerage of this shape at all.

When the utility model was installed, all material can be sent into from manhole door, according to the equipment inner wall shape processing is installed at device interior, when need carry out anti-corrosion treatment or other inspection operation to the bunkerage inside face, can stack floating to push up to roll, after maintenance is finished, launch to recover to get final product.Floating teleblem area is more bigger than liquid surface area in the bunkerage, is processed to strip flexible sealing band with the contact film of part of bunkerage inwall around the floating top.When liquid level changed in the equipment, flexible sealing band and film body can change thereupon, and maintenance contacts with the good of equipment inwall, strengthening the spreadability on floating top, and can reduce the friction of floating top and equipment inwall greatly.

Claims (3)

1, the flexible floating top of a kind of individual layer membrane type, it is characterized in that: whole floating top is made of a monofilm (1).

2, the flexible floating top of individual layer membrane type according to claim 1 is characterized in that: at monofilm (1) flexible sealing band (2) is set all around.

3, the flexible floating top of individual layer membrane type according to claim 2, it is characterized in that: flexible sealing band (2) is structure into strips, and is linked to be an integral body with monofilm (1).

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