CN2283637Y

CN2283637Y - Vertical cylinder steel floating-roof basin contact roller frame steel device

Info

Publication number: CN2283637Y
Application number: CN 97206292
Authority: CN
Inventors: 陈建平
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-03-11
Filing date: 1997-03-11
Publication date: 1998-06-10
Anticipated expiration: 2007-03-11

Abstract

The utility model provides a roller sealing device for a floating-roof tank. The utility model is characterized in that a supporting frame is arranged on top of a floating-roof. A U-shaped frame is at the front end of the supporting frame. A roller which contacts a tank wall is arranged in the U-shaped frame. A shaft body at the back end of the supporting frame is sheathed with a sealing spring, and installed in a box body of a supporting frame. Upper and lower elastic sealing strips are installed at the front end of the supporting frame. Most of the upper and the lower elastic sealing strips are fixed in an upper and a lower seal frames. An upper and a lower sealing inner frames are connected with an upper and a lower sealing rotary shafts which are installed on the U-shaped frame through shaft sleeves. An upper and a lower sealing adhesive tapes are laid between gaps between the upper sealing frame, the lower sealing frame and the floating-roof. Due to the fact that the roller always contacts the tank wall, the utility model has the advantages of good sealing effect.

Description

Vertical and cylindrical steel floating roof reservoir roller reinforced seal device

The utility model is a vertical and cylindrical steel floating roof reservoir roller reinforced seal device, is the improvement to existing sealing arrangement.

Vertical and cylindrical steel floating roof reservoir is mainly used to storage of crude oil and finished oil, chemical solution, and its diameter is generally between 20～80m.Floating in jar have a floating top, floating top is with liquid surface lifting, the floating top of upper and lower motion and fixedly the annular space between the tank body need take good sealing arrangement, to keep with the tank skin closed contact and don't to block, it is for the boil-off loss that reduces storage liquid, guarantee storage liquid quality and safe in operation, air conservation plays an important role.Present widely used sealing arrangement has following several: 1, mechanical seal: if any weight hammer type, gun rack type, spring loaded, its principle is utilized mechanical force will seal steel plate and closely is pressed against on the tank skin, enables to slide on tank skin, does not produce the gap again as far as possible.But there is following shortcoming in above-mentioned mechanical sealing: (1) is for the geometric configuration such as the out of roundness of tank skin, squareness and local convex-concave etc. require very high, thereby it is relatively poor for the comformability of circular clearance variation, the sealing steel plate is difficult for compressing with tank skin all the time everywhere, thereby influenced sealing property, evaporation loss is bigger; Floating top up-and-down movement, sealing steel plate are followed up-and-down movement, and friction force is big; (3) mechanics collision easily in lifting process, friction causes catches fire, and mechanics is subjected to jar interior gas-liquid corrosion malfunctioning easily for a long time, needs often maintenance.2, elasticity is filled sealing: in a sealing shroud, fill good springiness, yielding object as: foamed plastic or suitable fluid rely on the deformation in compression of weighting material to reach sealing purpose.This leak free oil and gas loss is little than mechanical seal, to tank skin Local Convex concavity require be not very high, comformability is stronger, is difficult for taking place floating top stuck phenomenon.But the supporting miscellaneous equipment of the single needs of this class sealing function as anti-rainwater baffle plate etc., also need the complicated paraffin cutting mechanism of a cover when storing crude oil.Sealing also exists and wears no resistance in addition, and foamed plastic is in compressive state for a long time and easily produces plastic deformation, makes problems such as its sealing force reduces.3, ligulate sealing: rely on elastic tongue piece and tank skin moving contact to play sealing function.This hermetically-sealed construction is simple, comformability is strong, but less to the sealing force of tank skin, is used for internal floating roof tank more, and oil and gas loss is filled sealing greatly than elasticity.

The purpose of this utility model is in order to solve the problem of above-mentioned existence, a kind of vertical and cylindrical steel floating roof reservoir roller reinforced seal device to be provided.It can be achieved as follows goal of the invention: 1, the shape friendshipization comformability to tank skin is strong; 2, sealing force is big, and friction force is little; 3, collection secondary seal, paraffin cutting mechanism, the multiple merit of flashing board is in one; 4, Fu Ding, internal floating roof tank all is suitable for.

In order to achieve the above object, the utility model comprises the sealing arrangement between floating top and floating top and tank skin annular space, it is characterized in that being provided with a bracing frame at floating top end face, this supporting framing front end is a U-shaped frame, in the U-shaped frame, be provided with the roller that contacts with tank skin, the axis body of bracing frame rear end is set with Packing spring and is contained in the bracing frame casing, be equipped with respectively up and down at supporting framing front end, following elastic sealing strip, on, following elastic sealing strip is fixed on, in the lower seal skeleton, on, the lower seal skeleton is connected with upper-lower seal rotating shaft on being contained in the U-shaped frame by axle sleeve, last, be covered with between the space between lower seal skeleton and the floating top, the lower seal adhesive tape.

Be with anti-drift spring in the Packing spring rear end, the length of anti-drift spring is 0.4～0.6 of Packing spring length.

On lower seal skeleton bottom surface, paraffin cutting mechanism is installed.

The utlity model has following advantage and good effect: 1, because supporting framing front end is provided with roller, spring force makes roller lean on tank skin all the time, when the upper and lower motion in floating top, roller rolls on tank skin and keeps the distance of upper-lower seal skeleton and tank skin constant, when the basin shape changes, bracing frame drives upper and lower sealing pivot, axle sleeve rotates, thereby the upper-lower seal skeleton is adjusted thereupon, still keeps constant with the distance of tank skin.Be installed in the elastic sealing strip on the upper-lower seal skeleton, just keep closely contacting with tank skin all the time, reach good sealing purpose, thereby the alteration of form (as out of roundness, squareness, uneven place) of tank skin had stronger comformability, under the complex-shaped situation of tank skin, also can reach good sealing effectiveness; 2, because during the upper and lower motion in floating top, sealing arrangement mainly moves on tank skin by roller, compares with the sealing of other shape, and its friction force is much smaller, what floating jacking was fallen also increases flexibly, and the floating stuck phenomenon that withstands in the ascending, descending process can't take place; 3, on bracing frame, be provided with upper and lower sealant tape and upper and lower elastic sealing strip, formed secondary seal, improved sealing effectiveness, reduced the loss of storage liquid; 4, owing to all multifactor impacts, floating top tends to produce " drift " phenomenon, although floating top is provided with guide piece, " drift " phenomenon is still inevitable, thereby is set with two springs at the bracing frame axis body, and one is Packing spring; What another was short is anti-drift spring, when drift takes place in floating top, when the Packing spring distortion is arrived certain value greatly (about 80mm), begin to touch anti-drift spring, along with drift value increases, the elastic force of anti-drift spring will sharply increase, and will float the top and push up go back to a jar interior center district, make floating top remain at the center; 5, by the upper-lower seal rotating shaft upper and lower sealing skeleton and tank skin to be kept the distance constant for roller, thereby the distance that is located at the paraffin cutting mechanism of lower seal skeleton bottom surface and tank skin is followed and remained unchanged.Thereby paraffin cutting is effective; 6, the back seal adhesive tape can doublely be done rainproof baffle plate, one-object-many-purposes.

Fig. 1 is a main cutaway view of the present utility model;

Fig. 2 is the part sectional view of overlooking of the present utility model.

(1) floating top; (2) lower seal adhesive tape; (3) paraffin cutting mechanism; (4) tank skin; (5) lower seal rotating shaft; (6) elastic sealing strip under; (7) lower seal skeleton; (8) bracing frame; (9) roller; (10) go up elastic sealing strip; (11) back seal skeleton; (12) back seal rotating shaft; (13) back seal adhesive tape; (14) Packing spring; (15) anti-drift spring; (16) sealing arrangement; (17) bracing frame casing; (18) axle sleeve; (19) U-shaped frame; (20) axle sleeve.

Referring to Fig. 1, Fig. 2 (Fig. 2 is that partial cutaway has been removed last elastic sealing strip (10) and back seal adhesive tape (13)), be provided with sealing arrangement (16) at the annular space place of Fu Ding (1) and tank skin (4).This device constitutes: a bracing frame (8) is arranged, and its front end is a U-shaped frame (19), and roller (9) is housed in the cavity of U-shaped frame (19).On the axis body of bracing frame (8) rear end, be set with Packing spring (14) and anti-drift spring (15), the length of anti-drift spring (15) is 1/2 of Packing spring (14), the axis body of bracing frame (8), Packing spring (14), anti-drift spring (15) is installed in the bracing frame casing (17) of floating top (1) end face.Be respectively equipped with elastic sealing strip (10), (6) up and down up and down at U-shaped frame (19), upper and lower elastic sealing strip (10), (6) are embedded in upper and lower sealing skeleton (11), (7), and upper and lower sealing skeleton (11), (7) are connected by axle sleeve (18), (20) and the upper and lower sealing pivot (12), (5) that are contained on the U-shaped frame (19).When roller (9) when moving up and down, roller (9) contacts and tank skin (4) under Packing spring (14) elastic force effect all the time, at this moment, U-shaped frame (19) is by upper and lower sealing pivot (12), (5), axle sleeve (18), (20) drive upper and lower sealing skeleton (11), (7) swing, adjust the contact position of itself and tank skin (4), thereby make upper and lower sealing band (10), (6) be attached to (4) on the tank skin all the time, form good sealing.Gap between upper and lower sealing skeleton (11), (7) and Fu Ding outer end (1) is provided with upper and lower sealant tape (13), (2), forms secondary seal, good sealing effect not only, the erosion that also makes parts such as bracing frame avoid storing liquid.Paraffin cutting mechanism (3) is located on the bottom surface of lower seal skeleton (7), the adjust the clearance of it and tank skin (4) is at 2-3mm, because roller (9) touches tank skin (4) all the time, keep the distance of upper and lower sealing skeleton (11), (7) and tank skin (4) constant, paraffin cutting mechanism (3) follows constant, thereby has good paraffin cutting effect.

In a basin, the quantity of sealing arrangement (16) is according to the volume of basin, the variation of internal diameter and changing, and general corresponding circle radian is equipped with a sealing arrangement (16) in 2 °～6 ° scopes.

Claims

1, a kind of vertical and cylindrical steel floating roof reservoir liquid wheel reinforced seal device, it comprises that floating top (1) is with the sealing arrangement (16) between the annular space of floating top (1) and tank skin (4), it is characterized in that constituting of sealing arrangement (16): be provided with a bracing frame (8) at Fu Ding (1) end face, this bracing frame (8) front end is a U-shaped frame (19), in U-shaped frame (19), be provided with the roller (9) that touches mutually with tank skin (4), the axis body of bracing frame (8) rear end is set with Packing spring (14) and is contained in the bracing frame casing (17), be equipped with respectively up and down at bracing frame (8) front end, following elastic sealing strip (10), (6), on, following elastic sealing strip (10) is fixed on, lower seal skeleton (11), (7) in, on, lower seal skeleton (11), (7) by axle sleeve (18), (20) with the upper-lower seal rotating shaft (12) that is contained on the U-shaped frame (19), (5) be connected, last, lower seal skeleton (11), (7) and between the floating top (1) be covered with between the space, lower seal adhesive tape (13), (2).

2, vertical and cylindrical steel floating roof reservoir roller reinforced seal device according to claim 1, it is characterized in that being with anti-drift spring (15) in Packing spring (14) rear end, the length of anti-drift spring (15) is 0.4～0.6 of Packing spring (14) length.

3, vertical and cylindrical steel floating roof reservoir roller reinforced seal device according to claim 1 and 2 is characterized in that being fixed with paraffin cutting mechanism (3) on lower seal skeleton (7) bottom surface.