JPH10152191A - Weather seal device for floating roof type storage tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent rain water from entering by a method wherein a plurality of rain shielding plates are formed with a quadrilateral shaped sheet member, and the lower end part of each rain shielding plate is pivotally supported by a floating roof, and respective rain shielding plates are arranged in a manner to be butted in parallel by providing a specified apart bonding interval between the side end parts of respective rain shielding plates, and at the same time, connecting plates which cover the apart bonding intervals are provided. SOLUTION: A plurality of lower rain shielding plates 5 of a quadrilateral shape, comprising a sheet member, are arranged in order along the outer periphery of the upper surface of a floating roof 2 by superposing respective side edge parts of the lower rain shielding plates 5, and the lower end of each lower rain shielding plate 5 is pivotally supported by the floating roof 2, and at the same time, the upper end parts are stood against the internal surface of the peripheral wall of a storage tank main body for the installation. On the top of the lower rain shielding plates 5, upper rain shielding plates 4 are arranged, and in that case, the lower end parts of respective upper rain shielding plates 4 are fixed to locations closer to the tops of the upper surfaces of the lower rain shielding plates 5. At the same time, the upper end parts are stood against the peripheral wall of the storage tank main body, and respective upper rain shielding plates 4, being adjacent, are arranged in a manner to be butted in parallel by providing a specified apart bonding interval 6 between the side end parts 4S, 4S. Then, a connecting plate 7 is attached to one of the side end parts 4S so that the apart bonding interval 6 may be covered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weather seal device for a floating roof type storage tank.

[0002]

2. Description of the Related Art In a floating roof type storage tank in which a floating roof floats on a liquid stored in a storage tank main body, a cylindrical peripheral wall of the storage tank main body,
Generally, for example, a weather seal device as shown in FIG. 5 is provided so that rainwater does not enter the storage tank main body from a gap between the disk-shaped floating roof.

In this conventional weather seal device, a plurality of rain-prevention plates 20 formed of a quadrilateral thin plate are superimposed on the side edges 20S of the respective rain-prevention plates 20 so as to extend along the outer periphery of the upper surface of the floating roof 2. The rain shields 20 are arranged sequentially in parallel, and the lower end of each rain shield 20 is pivotally supported by a hinge 21 attached to the upper surface of the floating roof 2, and the upper end of each rain shield 20 is attached to the inner surface of the peripheral wall 1 of the storage tank body. It is arranged so as to cover the space above the gap 3 between the peripheral wall 1 and the floating roof 2.

On the upper end of each rain shield plate 20, a slide 22 shown in FIG. 5 is formed by wrapping a material such as urethane foam that can expand and contract with a coating material such as a conductive rubber film to form a round bar. Alternatively, a slide formed of a conductive non-ferrous metal such as brass into a split cylindrical shape is attached.

[0005] These slides 22 move along the inner surface of the storage tank main body peripheral wall 1 when the floating roof 2 floating on the storage liquid in the storage tank main body rises and falls according to the increase and decrease of the storage liquid. Slides smoothly and discharges static electricity charged on the floating roof 2 safely through the peripheral wall 1, makes the contact between the upper end of each rain shield 20 and the peripheral wall 1 liquid-tight, and flows down along the inner surface of the peripheral wall 1. Prevents incoming rainwater from entering the storage tank body.

Further, in the conventional weather shield device to which the slide 22 is attached, the lower end portion of each rain shield plate 20 is pivotally supported by a hinge 21 attached to the upper surface of the floating roof 2, and the upper end portion of each rain shield plate 20 is provided. Leaning against the inner surface of the peripheral wall 1 of the storage tank main body, and the floating roof 2 floating on the storage liquid horizontally moves on the surface of the storage liquid due to wind or the like, and the peripheral wall 1
Even if the gap 3 between the floating roof 2 and the floating roof 2 is enlarged or reduced, each rain barrier 20 leaning against the peripheral wall 1 with the lower end of each rain barrier 20 pivotally supported by the hinge 21 as a fulcrum.
Each of the rain shields 20 always covers the gap 3 that has been swung up and down or enlarged or reduced to prevent rainwater from entering the gap 3.

Further, the above conventional weather shield device includes a plurality of rain shields 20 made of a quadrilateral thin plate.
A side edge 20S of each of the rain shields 20 is sequentially superimposed, and a gap 3 between the storage tank main body peripheral wall 1 and the floating roof 2 is formed.
Is enlarged or reduced, and even if each rain shield plate 20 leaning against the peripheral wall 1 rotates and undulates, and even if the contact circumferential line of each rain shield plate 20 with the peripheral wall 1 changes to a large or small, each rain shield plate 2
The overlap margin of the 0 side edge portion 20S fluctuates, thereby preventing the occurrence of a gap into which rainwater enters between adjacent rain shields 20.

[0008]

However, in the above-mentioned conventional weather seal device, since the side edges of the plurality of rain shields are superposed and arranged in parallel, the contact with the peripheral wall 2 of the rain shield 20 is made. As shown in the schematic cross-sectional explanatory view of FIG. 6 showing the situation, a slight step-like gap 23 corresponding to the overlapping thickness is formed at the portion in contact with the peripheral wall 2 at the overlapping portion of the rain guard plate side edge portion 20S made of a thin plate material. However, there is a problem that the rainwater flowing down along the inner surface of the peripheral wall 1 from the small gap 23 enters the storage tank main body.

Although not shown in the drawings, in order to solve this problem, rain guards are provided in two upper and lower stages, and the overlap between the side edges of the upper rain shield and the side edges of the lower rain shield is provided. A two-stage type weather-sealing plate weather seal device in which the upper and lower rain shields are arranged so that they do not overlap each other, and the lower-stage rain shield prevents the intrusion of rainwater that has passed through a small gap in the upper rain shield overlap portion. Is considered. However, even in this two-stage rain shield weather sealing device, when the amount of rainfall increases, the rainwater flowing down through a small gap generated in the overlapping portion of the upper rain shield is in contact with the peripheral wall. There is a possibility that the peripheral wall may move laterally along the upper end portion, pass through a small gap formed in the overlapping portion of the lower rain shield, and enter the storage tank main body.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and more completely prevents rainwater from entering from a circumferential connection portion of each rain shield plate of a weather seal device. In addition to completely preventing rainwater from entering between the upper end of the rain shield plate and the peripheral wall leaning against the peripheral wall of the storage tank, a floating member capable of removing oil from rainwater containing oil flowing down along the peripheral wall of the storage tank body. It is intended to provide a weather seal device for a roof type storage tank.

[0011]

According to the present invention, there is provided a weather-sealing device for a floating roof type storage tank according to the present invention, wherein a plurality of rain shields are formed of a quadrilateral thin plate, and the lower ends of the respective rain shields are pivotally supported on the floating roof. The upper end of each rain shield is leaned against the peripheral wall of the storage tank main body, and the plurality of rain shields are provided with a predetermined separation gap between the side ends of the adjacent rain shields along the outer periphery of the floating roof. The connecting plate formed of a strip-shaped sheet material is disposed on one side of each of the adjacent rain shields so as to cover a predetermined separation gap provided between the side ends of the adjacent rain shields. It is provided so as to be fixed to the side end portion on the side, and is formed so as to more completely prevent rainwater from entering from the circumferential connection portion of each rain shield plate.

Further, the tip of the upper end portion of each rain barrier plate leaning against the peripheral wall of the storage tank main body is formed in an uneven mountain-valley shape, and the apex portion of the mountain portion formed in the mountain-valley shape or the sloping portion of the mountain portion is formed as described above. It is a weather sealing device for a floating roof type storage tank formed at a side end of each rain shield plate, and prevents rainwater from entering between a peripheral edge of an upper end portion of each rain shield plate leaning against a peripheral wall of the storage tank body and the peripheral wall, and It is formed so as to further completely prevent intrusion of rainwater from the connection portion in the circumferential direction of the rain shield.

[0013] A weather seal device for a floating roof type storage tank, comprising: a rainwater gutter provided along the outer periphery of a floating roof below a lower end portion of each of the rain shields, and an oil / water separator provided at a drain port of the rainwater gutter. It is formed to remove oil from rainwater containing oil flowing down along the peripheral wall of the storage tank body.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a weather sealing device for a floating roof type storage tank according to the present invention will be described with reference to FIGS. The illustrated embodiment is an example of a weather seal device of a two-stage type rain shield plate in which rain shield plates are arranged in two upper and lower stages. FIG. 1 is a partial perspective view in which an outline of the device is partially omitted. FIG. 2 is a schematic cross-sectional explanatory view of the weather seal device of FIG. 1, FIG. 3 is a schematic cross-sectional explanatory view showing an enlarged upper end portion of the weather seal device of FIG. 2, and FIG. It is the partial perspective explanatory view which omitted and showed the situation of the separation gap provided between each side end part.

As shown in FIGS. 1 and 2, in this embodiment, each lower rain shield plate 5 is formed in a structure in which the side edges 5S, 5S are overlapped like the above-mentioned conventional weather seal device. Each upper rain barrier plate 4 disposed on each lower rain barrier plate 5 is provided with a predetermined separation gap 6 between adjacent side ends 4S, 4S of each upper rain barrier plate 4, and the separation is provided. The connecting plate 7 covering the gap 6 is fixed to one side end 4S of one of the adjacent upper rain shields 4, 4, and the lower rain shield 5 firmly supports the load of the weather seal device and is durable. The upper-stage rain shield plate 4 is formed in a weather seal device having a two-stage rain shield plate structure for more completely preventing rainwater intrusion.

That is, the lower rain shield 5 is formed of a plurality of quadrangular lower rain shields 5, 5,.
Are sequentially arranged along the outer periphery of the upper surface of the floating roof 2 with the side edges 5S and 5S superposed on each other, and the lower end 5B of each lower rain shield plate 5 is attached to the upper surface of the floating roof 2. And the upper end of each lower rain shield plate 5 is set up against the inner surface of the peripheral wall 1 of the storage tank main body, and each side edge is provided as in the structure of the conventional weather seal device (FIG. 4) described above. The portions 5S and 5S are formed in a superposed structure.

The upper end of the lower rain shield plate 5 is provided with a slide 9 or a foamable material such as urethane foam, which is made of a conductive non-ferrous metal material such as brass and is formed in a split cylindrical shape. A slide (slide having the same structure as reference numeral 22 in FIG. 5) formed by wrapping with a coating material such as a conductive rubber film to form a round bar is attached.

The upper rain shield 4 provided on the lower rain shield 5 is formed by first forming a plurality of quadrangular upper rain shields 4, 4,... From a thin plate material such as a steel plate. The lower end of the upper rain shield plate 4 is screwed to the lower rain shield plate 5 pivotally supported by the floating roof 2 by using a bolt or nut or a rivet or the like via a mounting plate 10 near the upper surface of the lower rain shield plate 5. And the like, and the upper end of each of the upper rain shields 4 leans against the peripheral wall 1 of the storage tank main body, and the plurality of upper rain shields 4 are adjacent to each other along the outer periphery of the floating roof 2. A predetermined separation gap 6 is provided between the side ends 4S, 4S of the 4 and they are arranged in abutting and parallel arrangement.

The mounting plate 10 is formed of a belt-like leaf spring material or the like so that the upper end of the upper rain shield plate 4 is urged against the peripheral wall 1 of the storage tank main body in a biased manner and the adhesion to the peripheral wall 1 is enhanced.

As shown in FIGS. 1 and 4, the connecting plate 7 is formed in a strip shape from a flexible thin material such as a steel plate.
Are connected to the side ends 4S, 4S of the adjacent upper rain shields 4, 4.
A spacer 7S is provided on one side end 4S of each of the upper rain shields 4, 4 adjacent to cover a predetermined separation gap 6 provided therebetween.
And fixed by screwing using bolts and nuts or tacking using rivets or the like.

The connecting plate 7 fixed to the side end 4S on one side of each of the adjacent upper-stage rain shields 4, 4, as shown in FIG.
The spacer 7S is sandwiched so as not to hinder the movement of the upper-side rain shield plate side end 4S on the other side in the circumferential direction and the rotational undulation direction, and covers the side end 4S of the upper-side rain shield plate 4 on the other side. At the same time, the side end 4S of the adjacent upper rain shield plate,
The upper end of the 4S is formed so as to cover the upper end and prevent rainwater from entering from the separation gap 6 between the upper-stage rain shields 4 and the circumferential connection portions.

Further, at the top end edge of the connection plate 7,
As shown in the enlarged sectional view of FIG. 3, the tip is tapered,
A lining material 7L made of an elastic material such as a conductive rubber having an upper surface formed in the shape of a downward inclined surface for draining is attached, and rainwater flowing down along the peripheral wall 1 is drained to form an upper surface of the connection plate 7. The guide 3 is formed so that rainwater does not enter the gap 3 or the separation gap 6.

The predetermined separation gap 6 provided between the side ends 4S, 4S of the adjacent upper rain shields 4, 4 is formed by the peripheral wall 1
The gap 3 between the floating roof 2 and the floating roof 2 expands or contracts, and the upper rain shield 4 attached to the lower rain shield 5 pivotally supported by the floating roof 2 undulates, and each upper rain shield 4 Even if the contact circumference line with the peripheral wall 1 changes in magnitude, the side edges 4S of the adjacent upper rain shields 4, 4 must be at least the distance at which the side edges 4S, 4S do not collide with each other, and the side edge of each upper rain shield 4 The distance is set to be within an interval at which the connection plate 7 fixed to the portion 4S can cover the separation gap 6.

As shown in FIG. 1, a slide 11 is formed at the upper end of each upper rain shield 4 at the top edge of the upper end formed by a flexible thin plate material such as a steel plate in the shape of an uneven mountain valley.
Install.

The slide 11 at the top edge of the upper end has ridges 11 at the center and both side edges with valleys 11V and 11V therebetween.
M are formed in the shape of a mountain valley, and both side edge mountain portions 11 are formed.
M, 11M apex portions on both side edges 4 of each upper rain shield 4
S, 4S, and as shown in the enlarged sectional view of FIG.
A lining material 11L made of an elastic material such as conductive rubber and having a tapered tip and an upper surface formed into a downwardly inclined surface for draining is attached to the tip edge of the upper end of the slide 11.

However, the shape of the slide 11 attached to the upper end of each upper rain shield plate 4 does not need to be limited to the shape of the embodiment of FIG. 1, and the rain water flowing down along the inner surface of the peripheral wall 1 is A shape that guides toward the center from the side ends 4S, 4S of the upper rain shield plate 4, that is, the side end 4S where the separation gap 6 is provided, and drains, that is, a mountain portion 11
Other shapes may be adopted as long as the tops of M or the sloping portions of the hills 11M are formed on both side ends 4S, 4S of the upper rain shield 4.

As other shapes, although not shown, for example, a shape in which one valley of a mountain-valley shape is provided at the center,
Alternatively, there is a shape in which a number of mountain-valley-shaped peaks and slopes are formed on both side ends of each upper-stage rain shield.

As described above, the upper rain-prevention plate 4 has a predetermined separation gap 6 so that the operation of each of the upper rain-prevention plates 4 is not impeded even if the contact circumferential line with the peripheral wall 1 changes in size.
And a connection plate 7 covering the separation gap 6 is provided,
The conventional weather seal device prevents the gap 23 from being generated at the overlapping portion of the rain shields 20, improves the adhesion between the peripheral wall 1 and each upper rain shield 4, and reduces the circumferential connection between the upper rain shields 4. It is formed so as to more completely prevent rainwater from entering.

Then, the slide 11 of each upper rain shield 4
Is formed in an uneven mountain valley shape having an improved adhesion to the peripheral wall 1 having an arc-shaped inner wall surface to prevent rainwater from entering between the peripheral wall 1 and both ends 4S. ,
The top part of the mountain part 11M or the sloping part of the mountain part 11M formed in a mountain valley shape so as to guide and drain the rainwater from the 4S to the center part is formed on both side ends 4S, 4S of each upper rain shield plate 4. It is formed in a structure for preventing rainwater from entering from the separation gap 6.

In the experiment, the weather seal device of the two-stage rain shield formed in the structure of the above-described embodiment can prevent rainwater infiltration of 0.5% or less, that is, an almost perfect effect of preventing rainwater intrusion. ing.

A rainwater gutter formed of a section steel or the like in a U-shaped cross section along the outer periphery of the floating roof 2 below the lower end of the lower rain shield 5 on which the upper rain shield 4 is mounted. And a box-shaped oil-water separator in which an oil-absorbing material 13 such as an oil-absorbing mat formed of a polypropylene material or the like is filled on the upper surface of the floating roof 2 provided with a drain port 12E of the rainwater gutter 12. A vessel 14 is provided.

The oil / water separator 1 provided on the upper surface of the floating roof 2
The rainwater 4 which contains oil along the inner surface of the peripheral wall 1 is guided to the upper rain shield 4 and the lower rain shield 5, collected by the rain gutter 12, and flows down from the drain port 12 E of the rain gutter 12. After being introduced into the separator 14, the oil is adsorbed and removed by the oil adsorbent 13, the rainwater is discharged to the outlet 14E of the oil-water separator 14.
From the upper surface of the floating roof 2. The rainwater discharged from the upper surface of the floating roof 2 after removing the oil is removed from the floating roof 2.
From the roof drain (not shown) provided in the storage tank.

In the above-described embodiment, the lower rain shield 5 is formed in the structure of a conventional weather seal device in which the side edges 5S and 5S are overlapped, and is disposed on the lower rain shield 5. The upper rain shield 4 is attached to each side end 4S, 4S.
And a connecting plate 7 covering the separating gap 6, that is, a structure according to the present invention to form a weather seal device having a two-stage upper and lower structure. ing.

However, although not shown, the lower rain shields 5 of the above embodiment are arranged in a butt side-by-side manner with a clearance gap, and the clearance gap between the respective side ends is covered with a connection plate. The structure, that is, the lower rain shield is formed in the same structure as the structure of the upper rain shield according to the present invention, and even if rainwater passes through the upper rain shield, the lower rain shield blocks, and perfection of rainwater intrusion prevention is achieved. It may be formed in a weather seal device of an upper and lower two-stage rain barrier plate having a structure in which the height is increased.

Although not shown in the drawing, in a weather seal device having a single-stage rain shield structure without an upper rain shield plate, a plurality of rain shield plates formed of a quadrilateral thin plate are connected to the lower end portion of each of the rain shield plates. And the upper end of each rain shield is leaned against the peripheral wall of the storage tank body, and the plurality of rain shields are placed between the side edges of each adjacent rain shield along the outer periphery of the floating roof. A connection plate formed of a strip-shaped thin plate material is disposed adjacent to each other so as to cover a predetermined separation gap provided between the side ends of the adjacent rain shield plates, which are arranged in a butt-parallel manner with a predetermined separation gap. Forming a weather seal device having a one-stage rain shield structure according to the present invention, which is fixed to one side end of each rain shield plate to be formed, is simple in structure, is economical, and has excellent rainwater intrusion prevention performance. Can also form equipment Kill.

[0036]

As is apparent from the above description, the weather sealing device for a floating roof type storage tank according to the present invention has the following effects.

In the weather sealing device for a floating roof type storage tank according to the present invention, a predetermined separation gap is provided between the side end portions of the respective rain shield plates, and they are arranged in abutting and juxtaposed form to cover the predetermined separation gap. Since the connection plate is provided and formed, even if the contact circumferential line with the peripheral wall changes in size, the operation of each rain shield plate is not hindered, and the conventional weather seal device in which the side edges of the conventional rain shield plate are overlapped Since no gap is generated between the peripheral wall and the rain barrier, the tightness between the peripheral wall and the rain barrier is increased, and it is possible to more completely prevent rainwater from entering from the contact portion between the peripheral wall of the rain barrier and the peripheral connection part of each rain barrier. .

Further, the top edge of the upper end portion of each rain shield plate is formed in a concave-convex mountain-valley shape, and the apex of the peak formed in the mountain-valley shape or the climbing slope of the mountain portion is formed on the side end of each rain shield plate. With the formed one, the adhesion between the top end edge of each rain shield and the peripheral wall having the arc-shaped inner wall surface is enhanced, and it is possible to further completely prevent rainwater intrusion from between the peripheral wall and the top end edge. In order to guide rainwater that has flowed down the peripheral wall from the side edge of each rain shield plate to the center and drain the water, rainwater intrusion from the separation gap provided between the side edges of each rain shield plate is more perfect. Can be prevented.

In the case where the oil / water separator is provided, the rainwater that has passed down the inner surface of the peripheral wall and contains oil has been guided by a rain baffle, collected by a rainwater gutter, and then drained from the drainage port of the rainwater gutter. Since the rainwater from which oil has been removed by the oil adsorbent is drained to the outside of the storage tank via the floating roof, it is possible to prevent the oil from flowing down and prevent the floating roof from being stained.

[0040]

[Brief description of the drawings]

FIG. 1 is a schematic perspective explanatory view showing an example of a weather sealing device embodiment of a floating roof type storage tank according to the present invention, with a part thereof being omitted.

FIG. 2 is an explanatory cross-sectional view of the embodiment of FIG.

FIG. 3 is a schematic partial cross-sectional explanatory view in which a part of FIG. 2 is enlarged and partially omitted.

FIG. 4 is a schematic partial perspective explanatory view in which the situation of the separation gap in FIG. 1 is enlarged and partially omitted.

FIG. 5 is a perspective explanatory view in which a general outline of a conventional weather seal device is partially omitted.

FIG. 6 is a schematic partial cross-sectional explanatory view showing a condition of a rain shield plate overlapping portion in FIG. 5 with a part omitted.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Peripheral wall of storage tank body 2 Floating roof 3 Gap 4 Upper rain shield 4S side end 5 Lower rain shield 5S Side edge 6 Separation gap 7 Connection plate 7L Lining material 7S Spacer 8 Hinge 9 Slide 10 Mounting plate 11 Slide 11L Lining material 11M Mountain part 11V Valley part 12 Rain gutter 12E Drain port 13 Oil adsorbent 14 Oil water separator 14E Outlet 20 Rain barrier 20S Side edge 20B Lower end 20T Upper end 21 Hinge 22 Slide 23 Gap

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kiyoshi Maruyama 6-5-1 Higashi-Kojiya, Ota-ku, Tokyo Inside Ishii Iron Works Co., Ltd.

Claims (3)

[Claims] 1. A plurality of rain shields are formed of a quadrilateral thin plate material, and the lower end of each rain shield is pivotally supported on a floating roof, and the upper end of each rain shield is leaned against the peripheral wall of the storage tank body, and The plurality of rain shields are arranged in a butt side-by-side relationship with a predetermined gap between the side ends of the adjacent rain shields along the outer periphery of the floating roof, and the side ends of the adjacent rain shields are provided. A floating roof, wherein a connecting plate formed of a band-shaped thin plate material is fixedly attached to one side end of each adjacent rain shield plate so as to cover a predetermined separation gap provided between the portions. Weather seal device for storage tank. 2. A top edge of an upper end portion of each rain shield plate leaning against a peripheral wall of the storage tank main body is formed in a concave-convex mountain-valley shape, and an apex portion of the mountain portion formed in the mountain-valley shape or a hill-climbing portion of the mountain portion is formed. The weather sealing device for a floating roof type storage tank according to claim 1, wherein the weather sealing plate is formed at a side end of each rain shield plate. 3. A rainwater gutter is provided along an outer periphery of a floating roof below a lower end of each of the rain shields, and an oil / water separator is provided at a drain port of the rainwater gutter. The weather sealing device of the floating roof storage tank according to the above.