JP2014210607A - Floating roof for storage tank and weather seal apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure which has a good sealing effect while being always in tight contact with the inner surface of a tank side wall, does not link with the trouble even when caught partially by an ascending floating roof and self-returns easily to a normal state.SOLUTION: In a weather seal apparatus 3, the clearance between an inner surface 1a of a tank side wall and a floating roof 2 is shielded by means of a weather hood 30 having a bent portion 33 which protrudes obliquely upward in a state of being supported on the upper surface side of the floating roof 2 floating on a liquid in a tank 1 and is provided on the tip end side to come in contact freely slidably with the inner surface of the tank side wall. The weather seal apparatus 3 has brush type seal means 5 formed by combining a large number of elastic materials 7 or 8 multiply to a specified thickness, at least with the tip end side in the form of a brush composed of lines and pieces collected together and the rear end side in the form of a brush attached to a holding jig. With the seal means 5 supported by the weather hood 30, the tips of the elastic materials come in contact with the inner surface 1a of the tank side wall from above the bent portion 33.

Description

  The present invention relates to a floating roof of a tank for storing a liquid such as oil, and a weather seal device used for shielding a gap between the inner surface of the tank side wall and the floating roof to prevent entry of water or the like into the tank. About.

  FIG. 9A is a floating roof type tank for storing oil or the like disclosed in Patent Document 1. FIG. In this structure, a substantially bottomed cylindrical tank, a floating roof 100 suspended above the liquid in the tank, a tank seal 102 disposed between the periphery of the floating roof and the tank side wall inner surface 200a, and the upper surface of the floating roof The weather hood 11 installed on the side includes a weather seal device 3 that shields a gap between the side wall inner surface 200a and the floating roof 100.

  Among these, the tank is made of a steel plate and the surface thereof is coated with urethane or the like. The floating roof 100 is composed of a main body (deck plate) and an outer peripheral pontoon 101, and the upper surface of the main body has a mortar shape, and moves up and down as the liquid in the tank increases and decreases. Rainwater entering the tank gathers at the center of the main body and is drained to the outside through a drain port (not shown) and a drain pipe disposed between the drain port and the tank bottom plate side. The tank seal 102 is attached to the peripheral side of the pontoon 101 and closes the gap between the side wall inner surface 200a. However, when the floating roof 100 moves or tilts horizontally due to external force such as vibration or strong wind, A gap is formed between them, liquid leakage and volatile gas leakage occur from the gap, and dust and rainwater can enter from the outside. In order to prevent such a problem, the weather seal device 3 protrudes obliquely upward in a state where the weather hood 11 is rotatably supported via a hinge member 107 with respect to a mounting base installed on the floating roof 100. And a seal guide 11b which is provided on the upper side and which is a tip R portion (bent portion) slidably in contact with the side wall inner surface 200a, and between the side wall inner surface 200a and the floating roof 100 by the seal guide 11b. Shield gaps.

  In the above structure, since the tank is cylindrical and the side wall inner surface 200a has an arcuate shape, a slight gap is generated even if the corner or plate-shaped seal guide 11b is in contact with the side wall inner surface so as to be obliquely covered. As a countermeasure, in this structure, a rectangular rubber plate 20 that is an elastic seal material supported by the weather hood 11 is provided, and the front end of the rubber plate is in contact with the inner surface of the side wall from the upper side of the seal guide 11b. Further, the rubber plate 20 has a thin tip and is pressed by the spring plate 40, so that it can provide adhesion to the inner surface 200a of the side wall.

  As another countermeasure example, in the structure of Patent Document 2, as shown in FIG. 9 (b), the weather shield 4 corresponding to the weather hood 11 is formed on the tank side wall inner surface 2 a and has a bowl shape above the weather shield 4. A covering member 12 is provided. The weather shield 4 is integrally formed with a tip R portion 4b. In this structure, the covering member 12 is detachably attached to the side wall inner surface 2a with the magnetic sheet 8 and a resin film (not shown) interposed therebetween, so that the magnetic sheet is deteriorated or melted by heat and further melted. This eliminates the problem of fouling the inner surface of the side wall.

JP 2011-98764 A (FIGS. 1 to 6) JP 2004-262516 A (FIGS. 1 and 7)

  Among the above-mentioned conventional measures, when the elastic plate (rubber plate), which is the elastic sealing material of FIG. 9A, is used, the plate width is as wide as the weather hood and is wide. The rubber plate tip, that is, a part of the reduced thickness is caught by the unevenness on the inner surface of the tank side wall or the adhesive force of the deposit, and it is bent inward due to the catch, Furthermore, the upper side of the elastic plate is inserted. This encroachment phenomenon mainly follows when a floating roof descends because a wide plate material is used as an elastic sealing material and the thickness of the plate tip is reduced. If a part of the front end of the plate is caught, it becomes easy to squeeze the whole. This is because the pushing force by the weight of the weather hood acts as a component force on the distal end R portion (bending portion) of the weather hood, that is, the thin end portion of the elastic plate protruding from the tip of the seal guide to the inner surface of the side wall. It is considered that the pushing force due to the horizontal movement is also added and works as a bending force for the thin portion at the tip of the elastic plate.

  9B, when the liquid in the tank decreases, the distance between the heel and the tip R of the weather shield (corresponding to the weather hood) increases, or along the inner surface of the tank side wall. The rainwater that falls down accumulates at the tip R and easily flows into the tank. Moreover, even if the attachment position of the heel is changed, the lower the liquid level, the more complicated it becomes to secure a scaffold, which takes time and money.

  Accordingly, an object of the present invention is to provide a good sealing effect that is always in close contact with the inner surface of the tank side wall as a measure on the assumption that there are irregularities and deposits on the inner surface of the tank side wall from the above background. In addition, it is to realize a structure that is not chained even if a part of the floating roof is inserted when the floating roof is lifted, and that can easily return to the normal state.

  To achieve the above object, the present invention, when specified with reference to the drawings, projects obliquely upward while being supported on the upper surface side of the floating roof 2 floating on the liquid in the storage tank 1 and is provided at the tip side. In the weather seal device 3 that shields the gap between the tank side wall inner surface 1a and the floating roof 2 by the weather hood 30 having the bent portion 33 that is slidably in contact with the tank side wall inner surface 1a, a large number of elasticity is provided. A brush-type sealing means 4 is used in which a material 7 or 8 is used in combination so as to have a predetermined thickness, and at least the tip side is formed into a brush shape in which lines or pieces are collected and the rear end side is attached to a holder. And having the sealing means 4 supported by the weather hood 30, the tip of the elastic material is in contact with the inner surface of the tank side wall from above the bent portion. The weather hood 30 described above is substantially the same as the weather shield 4 of Patent Document 2. The bent portion is not limited to the reference numeral 33b in FIG. 2 or the reference numeral 11b in FIG. 9A, and may have the configuration of the reference numeral 4b in FIG. 9B. In short, it includes a wide range of shapes that are bent at an appropriate angle or bent in an arc shape or an arc shape.

It is more preferable to develop the present invention as described in claims 2 to 6. That is,
(1) The elastic material has a configuration of a wire 11 as exemplified in FIG. 5 (Claim 2).
(2) The elastic material has a configuration of a plate material 18 divided into a plurality of pieces 18a through slits 18b except for the base end side as exemplified in FIG. 7 (Claim 3).
(3) It is the structure which has the holder 5 which hold | maintains one or more of the said sealing means 4 so that attachment or detachment is possible.

(4) The arm 39 is slidably connected to the weather hood 30 and the holder 5 is detachably connected to the arm 8 (Claim 5).
(5) On the other hand, claim 6 is specified as a floating roof including the above-described weather seal device, and is used in a substantially bottomed cylindrical tank 1 for storing a liquid such as crude oil and the liquid in the tank. A floating roof 2 suspended above, together with a tank seal 25 attached to the floating roof 2 and suspended between the floating roof 2 and the tank side wall in a state of floating on the liquid. It is the structure provided with the weather seal apparatus 3 in any one of 1-5.

  In the invention of claim 1, since the sealing means uses a plurality of elastic materials and is combined in a multiple so as to have a predetermined thickness, at least the tip side is a brush-like shape that collects lines or pieces. Even if it is uneven or dirty with deposits, or even if the floating roof descends or rises, it is always easy to be in close contact with the inner surface of the tank side wall, thereby ensuring a good sealing effect. More specifically, the weather seal device according to the present invention, when rainwater sprayed on the inner surface of the tank side wall along with the wind and rain flows along the inner surface of the side wall of the tank, It flows along and guides rainwater away from the inner surface of the side wall by the same action as that of thatched roof. As a result, as compared with the conventional structure, this sealing means can be reliably blocked from flowing rainwater sprayed to the inner surface of the tank side wall between the bent portion of the weather hood and the inner surface of the tank side wall because it is made of a brush.

  In each of the inventions according to claims 2 and 3, the specific configuration of the elastic material used for the sealing means is the same as that of either the wire material or the plate material divided into a plurality of pieces through the slit except for the base end side. The action can guide the direction of rainwater flow away from the inner surface of the tank side wall.

  According to the invention of claim 4, rainwater sprayed on the inner surface of the side wall is weather hood as shown in the two-stage configuration of FIG. The possibility of flowing between the bent portion and the inner surface of the side wall can be blocked more reliably. Moreover, this structure is excellent in that the sealing means is detachably attached to the holder, so that it can be easily replaced.

  In the invention of claim 5, since the arm is slidably connected to the weather hood, and the holder is detachably connected to the arm, the inner surface of the tank side wall is devised, for example, by devising the shape of the arm. It is possible to optimize the contact angle of the tip of the elastic material with respect to or to keep the sealing means in contact with the inner surface of the side wall by its own weight.

  In the invention of claim 6, the floating roof used for the storage tank can have the advantages of claims 1 to 5, thereby improving the reliability of the storage tank.

(A) is the schematic diagram which shows the weather seal apparatus of 1st form seen from the inside of a tank, (b) is the b section enlarged view of the same (a), (c) is the c section enlarged view of the same (a). It is. (A) is a schematic diagram showing the state viewed from the direction A in FIG. 1 (a), (b) is an enlarged view of the d part of (a), and (c) is a shielding action against rain in the state of (b). It is a schematic diagram which shows. (A) is a schematic diagram which shows the normal state of the floating roof of FIG. 2 (a), (b) is a schematic diagram which shows the state which the floating roof moved from the normal state to the arrow of FIG. 2 (a), ie, the left direction. . (A)-(c) It is a schematic diagram which shows the displacement of the said weather seal apparatus in the process in which a floating roof raises by the liquid injection into a tank. The sealing means of the invention which comprises the said weather seal apparatus is shown typically, (a) is a front view, (b) is a top view, (c) is a rear view, (d) is a side view. (A) is a model external view which shows the relationship between the said sealing means and a holder, (b) is a side view which shows the relationship between a sealing means, a holder, an arm, and a base. The sealing means of other invention which comprises the said weather seal apparatus is shown typically, (a) is a front view, (b) is a top view, (c) is a rear view, (d) is a side view. is there. (A) is a model external view which shows the relationship between the said sealing means and a holder, (b) is a side view which shows the relationship between a sealing means, a holder, an arm, and a base. (A) is a schematic diagram showing a weather seal device of Patent Document 1, and FIG. 2 is a schematic diagram showing a weather seal device of Patent Document 2.

  Embodiments to which the present invention is applied will be described below with reference to the drawings. In this description, the basic structure common to the first embodiment shown in FIGS. 1 to 6 and the second embodiment shown in FIGS. 7 and 8, the brush-type sealing means of the first embodiment, and the brush-type seal of the second embodiment. Means and main operations will be described in detail in this order. Note that the drawings schematically show the details omitted.

(Basic Structure) In FIG. 1 and FIG. 2, the storage tank 1 is a substantially bottomed cylindrical tank with an open top, a floating roof 2 floating above the liquid in the tank 1, and the tank 1 A tank seal 25 disposed between the periphery of the floating roof 2 and the tank side wall inner surface 1a in a state of being floated on the liquid, and projecting obliquely upward while being supported on the upper surface side of the floating roof 2. A weather hood 30 having a bent portion (tip R portion) 33b provided on the tip side and slidably in contact with the tank side wall inner surface 1a, and a brush arranged obliquely upward while being supported by the weather hood 30 And a weather seal device 3 comprising a brush-type seal means 4 with the tip formed in contact with the side wall inner surface 1a.

  Here, the tank 1 is made of a steel plate and has a surface coated with urethane or the like. The tank capacity is, for example, a large capacity type having a height of about 20 to 25 m and an inner diameter of 70 to 90 m. A liquid such as crude oil is introduced into the tank 1 from an inlet (not shown) provided near the outer periphery, or discharged from an outlet (not shown).

  The floating roof 2 is composed of a disk-shaped main body (deck plate) and a buoyancy generating pontoon around the outside of the main body, and the inside of the tank 1 through an upper and lower guide means (not shown) provided in the tank 1. The rain water that enters the tank through the upper opening of the tank gathers in the center of the main body, and is disposed between the drain port (not shown) and the drain port and the tank bottom plate side. The point of draining to the outside through the drain pipe etc. is the same as before.

  On the upper surface of the pontoon of the floating roof 2, a mounting bracket 21 and a support 26 provided inside thereof are provided. The mounting bracket 21 protrudes along the outer periphery of the pontoon, and the tank seal 25 is attached to the mounting bracket 21. As inferred from FIG. 1, the supports 26 are provided on the upper surface of the pontoon of the floating roof 2, and are provided at equal intervals by the number of installed weather seal devices 3 arranged on a circle. Each support 26 includes a substantially U-shaped base 27 fixed to the upper surface of the pontoon of the floating roof 2, support plates 28 on both sides connected to both side walls of the base 27 by bolts B and the like, and a support plate It is comprised from the shaft 29 for pivots constructed between 28.

  The tank seal 25 has a schematic configuration in which a cushion material 23 such as a urethane home is covered with a rubber envelope 24. The tank seal 25 is formed between the periphery of the floating roof 2 and the side wall inner surface 1a in a state where both ends of the envelope 24 are attached to the mounting bracket 21 provided on the upper surface of the pontoon of the floating roof 2 by a fixing tool such as a bolt. Shield or seal between them.

  Note that the mounting bracket 21 also functions as an embankment that prevents rainwater or the like from flowing from the upper surface of the floating roof 2 to the tank seal 25 side. As the tank seal 25, for example, a sealing device using a gas block as disclosed in Japanese Patent Laid-Open No. 11-255290, a flange-shaped seal portion as disclosed in Japanese Patent Laid-Open No. 2006-69627, and a seal portion There may be a configuration in which a braking portion that suppresses the vertical movement of the floating roof is provided.

  The weather seal device 3 includes a weather hood 30 having a bent portion 33b that is rotatably supported by a shaft 29 of a support 26 and is slidably in contact with a side wall inner surface 1a. And a brush-type sealing means 4 having an elastic material 7 or 8 in the form of a ring, and the tip of the elastic material 7 or 8 from the upper side of the bent portion 33 in the state where the sealing means 4 is supported by the weather hood 30. It is in contact with 1a.

  The weather hood 30 has a rectangular plate shape, and a material having excellent conductivity is used to prevent a fire caused by the generation of static electricity. A pair of support brackets 31 are provided on the outer surface of the weather hood 30 so as to extend vertically so as to be arranged side by side. Each support bracket 31 has an L-shaped horizontal cross section, the horizontal portion 31a is fixed to the weather hood 30 with a bolt or the like, and the vertical portion 31b fixes the connecting plate 32 to the lower side with a bolt or the like. Each connecting plate 32 protrudes from the vertical portion 31b as shown in FIG. 2 (a), and a hooking groove 32a is formed on the protruding portion so as to be pivoted on the shaft 29.

  On the upper side of the weather hood 30, a seal guide 33 that forms a bent portion 33 b and a base 35 that constitutes sealing means 4 described later are fastened together by a plurality of bolts B. Among these, the seal guide 33 is made of a material that hardly generates static electricity, and includes a flat plate portion 33a that is stacked on the weather hood 30 and a bent portion 33b that is integrated with the upper end of the flat plate portion 33a. The bent portion 33b is formed of brass or the like, and in a state in which the weather hood 30 is supported by the shaft 29 of the support 26 via the connecting plate 32, the bent portion 33b is in contact with the side wall inner surface 1a so as to be slidable obliquely. Has become a department.

(Brush-type sealing means of the first form) In FIGS. 5 and 6, the sealing means 4 uses a plurality of wire rods 11 as the elastic member 7 and is combined in a multiple so as to have a predetermined thickness, and at least the tip side has a wire. The collected brush is formed, and the rear end side is attached to the holder 6. The sealing means 4 is supported via a base 35 fixed to the weather hood 30, an arm 39 slidably connected to the base 35, and a holder 5 detachably connected to the arm 39. Yes. The elastic member 7 in FIG. 6 is an imaginary view because it is difficult to show a large number of wires 11.

  More specifically, the wire 11 is made of an oil-resistant special synthetic resin or the like, and has a wire diameter of about 0.3 to 1.5 mm. The elastic material 7 is attached to the holder 6 in a state where a large number of the wire materials 11 are collected in a brush shape and the rear end side is converged by a band 12 or the like. The elastic material 7, that is, the assembled wire material 11, is gathered so as to have a thickness and a density that can exert a winding action. The tip is cut at an angle close to the contact angle of the weather hood 30 (the bent portion 33b) that contacts the side wall inner surface 1a (however, if the thickness of the elastic material 7 is thin, it does not need to be cut). In addition, as shown in FIG. 5B, the shape is widened outward from the lateral width of the holder 6. The latter point is that, as shown in FIG. 1A, the rain hood 30 or the sealing means 4 are arranged without gaps, and the elastic material 7, that is, the assembled wire rods 11, overlap each other by an L portion. I try not to leak from the gap between each other.

  The holder 6 has an engaging groove 16 provided on the rear side and protruding a claw 16a in the longitudinal direction on the opposing surface, and the recess 16b described above. The width dimension of the holder 6 is substantially the same as or slightly smaller than the width of the weather hood 30. The claws 16a on the opposing surface are arranged side by side at a predetermined interval. The elastic material 7 is joined and integrated into the recess 16b with the rear end fitted.

  The holder 5 has a substantially block shape, and includes two upper and lower connecting portions 13 and 14 protruding from the front surface, a connecting portion 15 protruding from the rear surface, and upper and lower openings 5a and 5b penetrating the front and rear. It is integrally formed and has a rainwater collecting receiving plate 9 fixed to the lower end. That is, the connection parts 13 and 14 have the nail | claw 13a provided in the upper-lower surface and extended in the longitudinal direction. And when the connection parts 13 and 14 are inserted with respect to the engagement groove | channel 16, the holder 6 is prevented from coming off in a state where the claws 13a and the claws 14a are elastically engaged between the claws 16a. The connecting portion 15 has an engaging groove 15a projecting a claw 15b in the longitudinal direction on the opposing surface. The claws 15b on the opposing surface are arranged side by side with a predetermined interval. The openings 5a and 5b are locations for allowing rainwater to escape as shown in FIG. The opening 5 a is provided between the connecting portions 13 and 14 from a position corresponding to the upper surface of the connecting portion 15. The opening 5 b is provided between a portion corresponding to the lower surface of the connecting portion 15 and the receiving plate 9. The receiving plate 9 is bent obliquely upward on the tip 9a side.

  The above holder 5 is detachably connected to and supported by a plate-like arm 39 that is rotatably supported with respect to the base 35. That is, as described above, the base 35 is on the upper side of the weather hood 30 and is disposed on the upper surface and is disposed on the lower surface and fixed together by the flat plate portion 33a of the seal guide and the bolt B. On the upper surface of the base 35, there are provided a mounting plate 34 welded and fixed to both upper sides, and a bearing tool 38 welded and fixed to the front side of each mounting plate 34. A stopper 37 is attached to each attachment plate 34 with a bolt B or the like as shown in FIG. Each bearing tool 38 forms a shaft hole penetrating on the coaxial line.

  The arm 39 is bent in a substantially square shape when viewed from the side, and an opening 39a is provided at the center for flowing water from the inside to the outside as shown in FIG. On the tip side of the arm 39, there is a claw 39b provided on the upper and lower surfaces and extending in the longitudinal direction. Then, when the arm tip is inserted into the engagement groove 15a of the holder, the arm 39 is prevented from coming off while the claw 39b is elastically engaged between the claws 15ba. A shaft S is welded and fixed to the lower side of the arm 39 along the upper surface edge. Both ends of the shaft S protrude from the corresponding side surface of the arm 39, and the protruding portion is rotatably fitted in the shaft hole of the corresponding bearing tool 38. A width determining collar is attached to the shaft S to prevent it from coming off. When the arm 39 is rotated by a predetermined angle in the counterclockwise direction via the shaft S supported by the bearing member 38 as shown in FIG. 6B, the arm 39 is brought into contact with the stopper 37 so as not to be rotated further. Be regulated.

(Brush-type sealing means of the second form) The brush-type sealing means of the second form is different from the brush-type sealing means of the first form in that the elastic material and the configuration related thereto are changed. For this reason, in this description, the same reference numerals are given to the same or similar members as the brush-type sealing means of the first embodiment, and only the changes will be described in detail in order to avoid duplication.

  7 and 8, the brush-type sealing means 4 uses a plate material 18 divided into a plurality of pieces 18a through slits 18b except for the base end side as the elastic material 8, and a large number of the plate materials 8 are used. In combination with multiple thicknesses so as to have a predetermined thickness, at least the tip side is formed into a brush shape collecting the pieces 18a, and the rear end side is attached to the holder 6. The elastic member 8 in FIG. 8 is an imaginary view because it is difficult to show a large number of plate members 18.

  More specifically, the plate member 18 is formed of an oil-resistant special synthetic resin or the like, and has a plate thickness that does not impair elastic displacement and a piece width of the piece 18a. The elastic member 8 is mounted in a state in which a large number of the plate members 18 are gathered in a brush shape and the rear end side is converged by a band 19 or the like and is fitted in the recess 16b of the holder 6. The elastic material 8, that is, the assembled plate material 18, is gathered so as to have a thickness and a density that can exert a rolling action. The tip is cut at an angle close to the contact angle of the weather hood 30 (the bent portion 33b) that contacts the side wall inner surface 1a (however, if the thickness of the elastic material 8 is thin, it does not need to be cut). Yes. Further, both sides are set so that adjacent plate members 18 mesh with each other as shown in FIG. This is because, as shown in FIG. 1 (a), the weather hood 30 or the sealing means 4 are arranged without a gap, and the elastic material 8, that is, the assembled plate members 18 overlap each other by L portion, so that rainwater is formed between the plate members. It is designed not to leak from the gap. Of course, the plate members 18 are preferably combined so that the upper and lower slits 18b do not overlap. In the test, when a rubber plate was used as the elastic member 18 and the slit 18b, that is, the vertical cut was small, the entire rubber plate was bent and overlapped when it returned to its original state. As a guide, although it depends on the plate thickness, it seems that notches of 2 to 4 mm are necessary at a plate thickness of 7 mm.

(Operation) Next, the operation characteristics when the above brush type seal means 4 is used will be described. (A) FIG. 2 shows a normal state in which the floating roof 2 is suspended in the liquid in the tank 1. In this state, the tank 1 is closed by the floating roof 2 floating on the liquid and the tank seal 25, and the weather seal device 3 shields the gap between the side wall inner surface 1 a and the floating roof 2. . In other words, the weather seal device 3 has a shielding action that firstly projects obliquely upward while being supported on the upper surface side of the floating roof 2 and is provided on the distal end side so as to slidably contact the side wall inner surface 1a. This is the same as in the prior art in that it is performed by the weather hood 30 having 33. In addition, the weather seal device 3 has the brush-type seal means 4 described above, and the seal means 4 is combined with the weather hood 30 in a state of being supported via the arm 39, the holder 5 and the like. The tip of the elastic material 7 or 8 is slidably in contact with the side wall inner surface 1 a from the upper side of the bent portion 33.

(B) That is, the brush-type sealing means 4 uses a large number of elastic materials 7 or 8 and is combined in multiple so as to have a predetermined thickness, and at least the tip side is a brush-like shape in which the lines 11 or pieces 18a are collected. Therefore, even if the side wall inner surface 1a is uneven or dirty with deposits, it is always easy to be in close contact with the arc-shaped side wall inner surface 1a. This point is clear when compared with the method using a single elastic plate of Patent Document 1. That is, in the configuration of one wide elastic plate as in Patent Document 1, a gap is likely to be generated between the inner surface 1a of the circular arc side wall even if the elastic plate. On the other hand, in the configuration in which the wires 11 or the pieces 18a are gathered, it is easy to become familiar with the arc of the side wall inner surface 1a, and the gap with the side wall inner surface 1a is absorbed accordingly.

(C) FIG. 2 (c) is a diagram assuming that rainwater sprayed on the side wall inner surface 1a of the tank 1 flows along the side wall inner surface 1a due to wind and rain. In the case of the brush-type sealing means 4, it flows along a large number of brush-like lines 11 in contact with the tank side wall inner surface 1 a or the pieces 18 a of the plate material 18, and rainwater is similar to that of thatched roof. It is guided to the side of the holder 5 and the arm 39 that are separated from the side wall inner surface 1a by the action. In this structure, even if rainwater passes through the brush-like tip of the upper seal means 4, the rainwater is guided to the outside along the brush shape of the lower seal means 4 from the opening 5 a of the flow holder 5. Moreover, even if rainwater passes through the brush shape of the lower sealing means 4, it is received by the receiving plate 9 and guided to the outside.

(D) FIG. 3A shows the normal state of the floating roof 2 as in FIG. 2, and FIG. 3B shows the state in which the floating roof 2 has moved in the direction of the arrow in FIG. In the weather seal device 3 described above, when the floating roof 2 moves in the horizontal direction, the inclination angle increases from d1 to d2. In other words, when the weather seal device 3 has a steep inclination such as the inclination angle d1, the arm 39 moves away from the stopper 37, and when the weather sealing apparatus 3 becomes gentle as the inclination angle d2, the arm 39 approaches the stopper 37 and finally moves. Abut. In this structure, both are devised so that the center of gravity of the holder 5 comes to the side wall inner surface 1a side from the bearing tool 38, whereby the brush-like shape of the sealing means 4, that is, the tip of the elastic material 7 or 8 is pressed to the side wall inner surface 1a side. This prevents the spring plate from being indispensable as shown in FIG. 9A and the excessive load from the elastic plate tip.

(E) FIG. 4 schematically shows a process in which the floating roof 2 is raised by the liquid introduced into the tank 1. It is assumed that irregularities and deposits are formed on the tank side wall inner surface 1a. FIG. 4 (a) shows that an abnormal load is applied to the tip of the elastic material 7 or 8 (a large number of lines 11 or a part of the piece 18a) due to unevenness or catching on the deposits while the floating roof 2 is rising. The case where the holder 5 is drawn toward the side wall inner surface 1a side is shown. In this structure, even in such a case, the receiving plate 9 is in contact with the side wall inner surface 1a to prevent scooping. 4B shows that the tip of the elastic material 7 or 8 (a part of the numerous wires 11 and the pieces 18a) is further inserted into the side wall inner surface 1a side than the receiving plate 9 from FIG. 4A. FIG. In this structure, the elastic material 7 or 8 increases the reaction force (force to return to the original shape) when the tip of the elastic material 7 or 8 (a part of the large number of wires 11 or the pieces 18a) is inserted to some extent. As shown by the imaginary line in FIG. 4C, the rotation is reversed by the reaction force and the arm 39 hits the stopper 37 so that the rotation stops. Thereafter, the elastic material 7 or 8 returns to the initial state as shown by the solid line in FIG.

  Note that the present invention only has to have the configuration specified in the claims, and the details can be variously changed or developed according to the purpose with reference to the above description of the embodiments. As an example, the sealing means 4 may be configured to support only one elastic material 7 or 8 on the holder 5, and conversely to support two or more. When two or more are supported, the elastic material 7 and the elastic material 8 of different types may be combined in addition to the elastic material 7 (8) of the same type.

1 ... Storage tank (1a is side wall inner surface)
2 ... Floating roof (21 is a mounting bracket, 26 is a holder)
3. Weather seal device (30 is weather hood, 31 is support bracket)
4 ... Sealing means 5 ... Holder (13 to 15 are connecting plate portions, 5a and 5b are openings)
6 ... retainer (16 is a groove, 16a is a nail)
7: Elastic material (11 is a wire, 12 is a base or fixed part)
8 ... Elastic material (18 is a plate material, 18a is a piece, 18b is a slit)
9 ... Receiver plate 25 ... Tank seal 33 ... Seal guide (33a is a mounting portion, 33b is a bent portion)
37 ... Stopper

  The present invention relates to a floating roof of a tank for storing a liquid such as oil, and a weather seal device used for shielding a gap between the inner surface of the tank side wall and the floating roof to prevent entry of water or the like into the tank. About.

  FIG. 9A is a floating roof type tank for storing oil or the like disclosed in Patent Document 1. FIG. In this structure, a substantially bottomed cylindrical tank, a floating roof 100 suspended above the liquid in the tank, a tank seal 102 disposed between the periphery of the floating roof and the tank side wall inner surface 200a, and the upper surface of the floating roof The weather hood 11 installed on the side includes a weather seal device 3 that shields a gap between the side wall inner surface 200a and the floating roof 100.

  Among these, the tank is made of a steel plate and the surface thereof is coated with urethane or the like. The floating roof 100 is composed of a main body (deck plate) and an outer peripheral pontoon 101, and the upper surface of the main body has a mortar shape, and moves up and down as the liquid in the tank increases and decreases. Rainwater entering the tank gathers at the center of the main body and is drained to the outside through a drain port (not shown) and a drain pipe disposed between the drain port and the tank bottom plate side. The tank seal 102 is attached to the peripheral side of the pontoon 101 and closes the gap between the side wall inner surface 200a. However, when the floating roof 100 moves or tilts horizontally due to external force such as vibration or strong wind, A gap is formed between them, liquid leakage and volatile gas leakage occur from the gap, and dust and rainwater can enter from the outside. In order to prevent such a problem, the weather seal device 3 protrudes obliquely upward in a state where the weather hood 11 is rotatably supported via a hinge member 107 with respect to a mounting base installed on the floating roof 100. And a seal guide 11b which is provided on the upper side and which is a tip R portion (bent portion) slidably in contact with the side wall inner surface 200a, and between the side wall inner surface 200a and the floating roof 100 by the seal guide 11b. Shield gaps.

  In the above structure, since the tank is cylindrical and the side wall inner surface 200a has an arcuate shape, a slight gap is generated even if the corner or plate-shaped seal guide 11b is in contact with the side wall inner surface so as to be obliquely covered. As a countermeasure, in this structure, a rectangular rubber plate 20 that is an elastic seal material supported by the weather hood 11 is provided, and the front end of the rubber plate is in contact with the inner surface of the side wall from the upper side of the seal guide 11b. Further, the rubber plate 20 has a thin tip and is pressed by the spring plate 40, so that it can provide adhesion to the inner surface 200a of the side wall.

  As another countermeasure example, in the structure of Patent Document 2, as shown in FIG. 9 (b), the weather shield 4 corresponding to the weather hood 11 is formed on the tank side wall inner surface 2 a and has a bowl shape above the weather shield 4. A covering member 12 is provided. The weather shield 4 is integrally formed with a tip R portion 4b. In this structure, the covering member 12 is detachably attached to the side wall inner surface 2a with the magnetic sheet 8 and a resin film (not shown) interposed therebetween, so that the magnetic sheet is deteriorated or melted by heat and further melted. This eliminates the problem of fouling the inner surface of the side wall.

JP 2011-98764 A (FIGS. 1 to 6) JP 2004-262516 A (FIGS. 1 and 7)

  Among the above-mentioned conventional measures, when the elastic plate (rubber plate), which is the elastic sealing material of FIG. 9A, is used, the plate width is as wide as the weather hood and is wide. The rubber plate tip, that is, a part of the reduced thickness is caught by the unevenness on the inner surface of the tank side wall or the adhesive force of the deposit, and it is bent inward due to the catch, Furthermore, the upper side of the elastic plate is inserted. This encroachment phenomenon mainly follows when a floating roof descends because a wide plate material is used as an elastic sealing material and the thickness of the plate tip is reduced. If a part of the front end of the plate is caught, it becomes easy to squeeze the whole. This is because the pushing force by the weight of the weather hood acts as a component force on the distal end R portion (bending portion) of the weather hood, that is, the thin end portion of the elastic plate protruding from the tip of the seal guide to the inner surface of the side wall. It is considered that the pushing force due to the horizontal movement is also added and works as a bending force for the thin portion at the tip of the elastic plate.

  9B, when the liquid in the tank decreases, the distance between the heel and the tip R of the weather shield (corresponding to the weather hood) increases, or along the inner surface of the tank side wall. The rainwater that falls down accumulates at the tip R and easily flows into the tank. Moreover, even if the attachment position of the heel is changed, the lower the liquid level, the more complicated it becomes to secure a scaffold, which takes time and money.

  Accordingly, an object of the present invention is to provide a good sealing effect that is always in close contact with the inner surface of the tank side wall as a measure on the assumption that there are irregularities and deposits on the inner surface of the tank side wall from the above background. In addition, it is to realize a structure that is not chained even if a part of the floating roof is inserted when the floating roof is lifted, and that can easily return to the normal state.

In order to achieve the above object, the present invention, when specified with reference to the drawings, protrudes obliquely upward in a state of being swingably supported on the upper surface side of the floating roof 2 floating on the liquid in the storage tank 1, and In a weather seal device 3 that shields a gap between the tank side wall inner surface 1a and the floating roof 2 by a weather hood 30 provided at the front end side and having a bent portion 33 slidably contacting the tank side wall inner surface 1a. A plurality of elastic members 7 or 8 made of a plate material 18 divided into a plurality of pieces 18a through slits 18b except for the wire 11 or the base end side, and combined in multiple to have a predetermined thickness, at least the distal end is the side is line or brush-like collection of pieces, and a brush-type sealing means 4 of the rear end side is mounted on the holder 6, the weather hood 30 side arms 39 are rotatably supported, and before A stopper 37 that abuts when the arm is rotated by a predetermined angle and prevents further rotation, and a holder that is connected to the distal end side of the arm 39 and that detachably holds one or more of the sealing means 4 The tip of the elastic material comes into contact with the inner surface of the tank side wall from the upper side of the bent portion in a state where the seal means 4 is supported by the weather hood 30 via the arm 39 and the holder 5. It is a feature. The weather hood 30 described above is substantially the same as the weather shield 4 of Patent Document 2. The bent portion is not limited to the reference numeral 33b in FIG. 2 or the reference numeral 11b in FIG. 9A, and may have the configuration of the reference numeral 4b in FIG. 9B. In short, it includes a wide range of shapes that are bent at an appropriate angle or bent in an arc shape or an arc shape.

Above invention, it is preferable to deploy your solved according to claim 2. That is, the holder 5 protrudes to the front and has two upper and lower connecting portions 13 and 14 to which the sealing means 4 can be attached and detached, and a connecting portion 15 that protrudes to the rear and attachable to the tip of the arm 39. In addition, the openings 5a and 5b that are penetrated back and forth to allow rainwater to escape are integrally formed, and the receiving plate 9 for collecting rainwater is fixed to the lower end.

On the other hand, the third aspect is specified as a floating roof including the weather seal device described above, and is used in a substantially bottomed cylindrical tank 1 for storing liquid such as crude oil and floats on the liquid in the tank. in floating roof 2 which is, together with the tank seal 25 disposed between the floating roof around said tank side wall interior surface in a state of being attached to the floating roof 2 is floating on the liquid, according to claim 1 or 2 It is the structure provided with the weather seal apparatus 3 of description.

  In the invention of claim 1, since the sealing means uses a plurality of elastic materials and is combined in a multiple so as to have a predetermined thickness, at least the tip side is a brush-like shape that collects lines or pieces. Even if it is uneven or dirty with deposits, or even if the floating roof descends or rises, it is always easy to be in close contact with the inner surface of the tank side wall, thereby ensuring a good sealing effect. More specifically, the weather seal device according to the present invention, when rainwater sprayed on the inner surface of the tank side wall along with the wind and rain flows along the inner surface of the side wall of the tank, It flows along and guides rainwater away from the inner surface of the side wall by the same action as that of thatched roof. As a result, as compared with the conventional structure, this sealing means can be reliably blocked from flowing rainwater sprayed to the inner surface of the tank side wall between the bent portion of the weather hood and the inner surface of the tank side wall because it is made of a brush.

In the present invention, as a specific configuration of the elastic material used for the sealing means, rainwater can be obtained by the same action as that of either the wire material or the plate material divided into a plurality of pieces through the slit except for the base end side. The flow direction can be guided away from the inner surface of the tank side wall.

Further, in the present invention, by attaching a plurality of the above-mentioned sealing means to the holder, such as one, two, or three, as can be seen from the two-stage configuration in FIG. The possibility of flowing between the bent portion and the inner surface of the side wall can be more reliably blocked. Moreover, this structure is excellent in that the sealing means is detachably attached to the holder, so that it can be easily replaced.

Moreover, in this invention, since it has the arm connected so that rotation with respect to the weather hood was possible, and the holder was connected so that attachment or detachment was possible with respect to the arm, for example with respect to the tank side wall inner surface by devising the shape of an arm The contact angle of the elastic material tip can be optimized, or the sealing means can be kept in contact with the inner surface of the side wall by its own weight.

In the invention of claim 3, the floating roof used for the storage tank can be provided with the advantages of claims 1 and 2 , thereby improving the reliability of the storage tank.

(A) is the schematic diagram which shows the weather seal apparatus of 1st form seen from the inside of a tank, (b) is the b section enlarged view of the same (a), (c) is the c section enlarged view of the same (a). It is. (A) is a schematic diagram showing the state viewed from the direction A in FIG. 1 (a), (b) is an enlarged view of the d part of (a), and (c) is a shielding action against rain in the state of (b). It is a schematic diagram which shows. (A) is a schematic diagram which shows the normal state of the floating roof of FIG. 2 (a), (b) is a schematic diagram which shows the state which the floating roof moved from the normal state to the arrow of FIG. 2 (a), ie, the left direction. . (A)-(c) It is a schematic diagram which shows the displacement of the said weather seal apparatus in the process in which a floating roof raises by the liquid injection into a tank. The sealing means of the invention which comprises the said weather seal apparatus is shown typically, (a) is a front view, (b) is a top view, (c) is a rear view, (d) is a side view. (A) is a model external view which shows the relationship between the said sealing means and a holder, (b) is a side view which shows the relationship between a sealing means, a holder, an arm, and a base. The sealing means of other invention which comprises the said weather seal apparatus is shown typically, (a) is a front view, (b) is a top view, (c) is a rear view, (d) is a side view. is there. (A) is a model external view which shows the relationship between the said sealing means and a holder, (b) is a side view which shows the relationship between a sealing means, a holder, an arm, and a base. (A) is a schematic diagram showing a weather seal device of Patent Document 1, and FIG. 2 is a schematic diagram showing a weather seal device of Patent Document 2.

  Embodiments to which the present invention is applied will be described below with reference to the drawings. In this description, the basic structure common to the first embodiment shown in FIGS. 1 to 6 and the second embodiment shown in FIGS. 7 and 8, the brush-type sealing means of the first embodiment, and the brush-type seal of the second embodiment. Means and main operations will be described in detail in this order. Note that the drawings schematically show the details omitted.

(Basic Structure) In FIG. 1 and FIG. 2, the storage tank 1 is a substantially bottomed cylindrical tank with an open top, a floating roof 2 floating above the liquid in the tank 1, and the tank 1 A tank seal 25 disposed between the periphery of the floating roof 2 and the tank side wall inner surface 1a in a state of being floated on the liquid, and projecting obliquely upward while being supported on the upper surface side of the floating roof 2. A weather hood 30 having a bent portion (tip R portion) 33b provided on the tip side and slidably in contact with the tank side wall inner surface 1a, and a brush arranged obliquely upward while being supported by the weather hood 30 And a weather seal device 3 comprising a brush-type seal means 4 with the tip formed in contact with the side wall inner surface 1a.

  Here, the tank 1 is made of a steel plate and has a surface coated with urethane or the like. The tank capacity is, for example, a large capacity type having a height of about 20 to 25 m and an inner diameter of 70 to 90 m. A liquid such as crude oil is introduced into the tank 1 from an inlet (not shown) provided near the outer periphery, or discharged from an outlet (not shown).

  The floating roof 2 is composed of a disk-shaped main body (deck plate) and a buoyancy generating pontoon around the outside of the main body, and the inside of the tank 1 through an upper and lower guide means (not shown) provided in the tank 1. The rain water that enters the tank through the upper opening of the tank gathers in the center of the main body, and is disposed between the drain port (not shown) and the drain port and the tank bottom plate side. The point of draining to the outside through the drain pipe etc. is the same as before.

  On the upper surface of the pontoon of the floating roof 2, a mounting bracket 21 and a support 26 provided inside thereof are provided. The mounting bracket 21 protrudes along the outer periphery of the pontoon, and the tank seal 25 is attached to the mounting bracket 21. As inferred from FIG. 1, the supports 26 are provided on the upper surface of the pontoon of the floating roof 2, and are provided at equal intervals by the number of installed weather seal devices 3 arranged on a circle. Each support 26 includes a substantially U-shaped base 27 fixed to the upper surface of the pontoon of the floating roof 2, support plates 28 on both sides connected to both side walls of the base 27 by bolts B and the like, and a support plate It is comprised from the shaft 29 for pivots constructed between 28.

  The tank seal 25 has a schematic configuration in which a cushion material 23 such as a urethane home is covered with a rubber envelope 24. The tank seal 25 is formed between the periphery of the floating roof 2 and the side wall inner surface 1a in a state where both ends of the envelope 24 are attached to the mounting bracket 21 provided on the upper surface of the pontoon of the floating roof 2 by a fixing tool such as a bolt. Shield or seal between them.

  Note that the mounting bracket 21 also functions as an embankment that prevents rainwater or the like from flowing from the upper surface of the floating roof 2 to the tank seal 25 side. As the tank seal 25, for example, a sealing device using a gas block as disclosed in Japanese Patent Laid-Open No. 11-255290, a flange-shaped seal portion as disclosed in Japanese Patent Laid-Open No. 2006-69627, and a seal portion There may be a configuration in which a braking portion that suppresses the vertical movement of the floating roof is provided.

  The weather seal device 3 includes a weather hood 30 having a bent portion 33b that is rotatably supported by a shaft 29 of a support 26 and is slidably in contact with a side wall inner surface 1a. And a brush-type sealing means 4 having an elastic material 7 or 8 in the form of a ring, and the tip of the elastic material 7 or 8 from the upper side of the bent portion 33 in the state where the sealing means 4 is supported by the weather hood 30. It is in contact with 1a.

  The weather hood 30 has a rectangular plate shape, and a material having excellent conductivity is used to prevent a fire caused by the generation of static electricity. A pair of support brackets 31 are provided on the outer surface of the weather hood 30 so as to extend vertically so as to be arranged side by side. Each support bracket 31 has an L-shaped horizontal cross section, the horizontal portion 31a is fixed to the weather hood 30 with a bolt or the like, and the vertical portion 31b fixes the connecting plate 32 to the lower side with a bolt or the like. Each connecting plate 32 protrudes from the vertical portion 31b as shown in FIG. 2 (a), and a hooking groove 32a is formed on the protruding portion so as to be pivoted on the shaft 29.

  On the upper side of the weather hood 30, a seal guide 33 that forms a bent portion 33 b and a base 35 that constitutes sealing means 4 described later are fastened together by a plurality of bolts B. Among these, the seal guide 33 is made of a material that hardly generates static electricity, and includes a flat plate portion 33a that is stacked on the weather hood 30 and a bent portion 33b that is integrated with the upper end of the flat plate portion 33a. The bent portion 33b is formed of brass or the like, and in a state in which the weather hood 30 is supported by the shaft 29 of the support 26 via the connecting plate 32, the bent portion 33b is in contact with the side wall inner surface 1a so as to be slidable obliquely. Has become a department.

(Brush-type sealing means of the first form) In FIGS. 5 and 6, the sealing means 4 uses a plurality of wire rods 11 as the elastic member 7 and is combined in a multiple so as to have a predetermined thickness, and at least the tip side has a wire. The collected brush is formed, and the rear end side is attached to the holder 6. The sealing means 4 is supported via a base 35 fixed to the weather hood 30, an arm 39 slidably connected to the base 35, and a holder 5 detachably connected to the arm 39. Yes. The elastic member 7 in FIG. 6 is an imaginary view because it is difficult to show a large number of wires 11.

  More specifically, the wire 11 is made of an oil-resistant special synthetic resin or the like, and has a wire diameter of about 0.3 to 1.5 mm. The elastic material 7 is attached to the holder 6 in a state where a large number of the wire materials 11 are collected in a brush shape and the rear end side is converged by a band 12 or the like. The elastic material 7, that is, the assembled wire material 11, is gathered so as to have a thickness and a density that can exert a winding action. The tip is cut at an angle close to the contact angle of the weather hood 30 (the bent portion 33b) that contacts the side wall inner surface 1a (however, if the thickness of the elastic material 7 is thin, it does not need to be cut). In addition, as shown in FIG. 5B, the shape is widened outward from the lateral width of the holder 6. The latter point is that, as shown in FIG. 1A, the rain hood 30 or the sealing means 4 are arranged without gaps, and the elastic material 7, that is, the assembled wire rods 11, overlap each other by an L portion. I try not to leak from the gap between each other.

  The holder 6 has an engaging groove 16 provided on the rear side and protruding a claw 16a in the longitudinal direction on the opposing surface, and the recess 16b described above. The width dimension of the holder 6 is substantially the same as or slightly smaller than the width of the weather hood 30. The claws 16a on the opposing surface are arranged side by side at a predetermined interval. The elastic material 7 is joined and integrated into the recess 16b with the rear end fitted.

The holder 5 has a substantially block shape, and includes two upper and lower connecting portions 13 and 14 protruding from the front surface, a connecting portion 15 protruding from the rear surface, and upper and lower openings 5a and 5b penetrating the front and rear. It is integrally formed and has a rainwater collecting receiving plate 9 fixed to the lower end. That is, the connecting portions 13 and 14 have claws 13a and 14a provided on the upper and lower surfaces and extending in the longitudinal direction. And when the connection parts 13 and 14 are inserted with respect to the engagement groove | channel 16, the holder 6 is prevented from coming off in a state where the claws 13a and the claws 14a are elastically engaged between the claws 16a. The connecting portion 15 has an engaging groove 15a projecting a claw 15b in the longitudinal direction on the opposing surface. The claws 15b on the opposing surface are arranged side by side with a predetermined interval. The openings 5a and 5b are locations for allowing rainwater to escape as shown in FIG. The opening 5 a is provided between the connecting portions 13 and 14 from a position corresponding to the upper surface of the connecting portion 15. The opening 5 b is provided between a portion corresponding to the lower surface of the connecting portion 15 and the receiving plate 9. The receiving plate 9 is bent obliquely upward on the tip 9a side.

The above holder 5 is detachably connected to and supported by a plate-like arm 39 that is rotatably supported with respect to the base 35. That is, the base 35, in the upper side of the weather hood 30 as described above, are fastened together by the flat plate portion 33a and the bolt B arrangement Sareshi Rugaido on the lower surface while being positioned on the top surface. On the upper surface of the base 35, there are provided a mounting plate 34 welded and fixed to both upper sides, and a bearing tool 38 welded and fixed to the front side of each mounting plate 34. A stopper 37 is attached to each attachment plate 34 with a bolt B or the like as shown in FIG. Each bearing tool 38 forms a shaft hole penetrating on the coaxial line.

The arm 39 is bent in a substantially square shape when viewed from the side, and an opening 39a is provided at the center for flowing water from the inside to the outside as shown in FIG. On the tip side of the arm 39, there is a claw 39b provided on the upper and lower surfaces and extending in the longitudinal direction. Then, when the arm tip is inserted into the engagement groove 15a of the holder, the arm 39 is prevented from coming off while the claw 39b is elastically engaged between the claws 15a and 15b . A shaft S is welded and fixed to the lower side of the arm 39 along the upper surface edge. Both ends of the shaft S protrude from the corresponding side surface of the arm 39, and the protruding portion is rotatably fitted in the shaft hole of the corresponding bearing tool 38. A width determining collar is attached to the shaft S to prevent it from coming off. When the arm 39 is rotated by a predetermined angle in the counterclockwise direction via the shaft S supported by the bearing member 38 as shown in FIG. 6B, the arm 39 is brought into contact with the stopper 37 so as not to be rotated further. Be regulated.

(Brush-type sealing means of the second form) The brush-type sealing means of the second form is different from the brush-type sealing means of the first form in that the elastic material and the configuration related thereto are changed. For this reason, in this description, the same reference numerals are given to the same or similar members as the brush-type sealing means of the first embodiment, and only the changes will be described in detail in order to avoid duplication.

7 and 8, the brush-type sealing means 4 uses a plate material 18 divided into a plurality of pieces 18a through slits 18b except for the base end side as the elastic material 8, and a large number of plate materials 18 are used. In combination with multiple thicknesses so as to have a predetermined thickness, at least the tip side is formed into a brush shape collecting the pieces 18a, and the rear end side is attached to the holder 6. The elastic member 8 in FIG. 8 is an imaginary view because it is difficult to show a large number of plate members 18.

  More specifically, the plate member 18 is formed of an oil-resistant special synthetic resin or the like, and has a plate thickness that does not impair elastic displacement and a piece width of the piece 18a. The elastic member 8 is mounted in a state in which a large number of the plate members 18 are gathered in a brush shape and the rear end side is converged by a band 19 or the like and is fitted in the recess 16b of the holder 6. The elastic material 8, that is, the assembled plate material 18, is gathered so as to have a thickness and a density that can exert a rolling action. The tip is cut at an angle close to the contact angle of the weather hood 30 (the bent portion 33b) that contacts the side wall inner surface 1a (however, if the thickness of the elastic material 8 is thin, it does not need to be cut). Yes. Further, both sides are set so that adjacent plate members 18 mesh with each other as shown in FIG. This is because, as shown in FIG. 1 (a), the weather hood 30 or the sealing means 4 are arranged without a gap, and the elastic material 8, that is, the assembled plate members 18 overlap each other by L portion, so that rainwater is formed between the plate members. It is designed not to leak from the gap. Of course, the plate members 18 are preferably combined so that the upper and lower slits 18b do not overlap. In the test, when a rubber plate was used as the elastic member 18 and the slit 18b, that is, the vertical cut was small, the entire rubber plate was bent and overlapped when it returned to its original state. As a guide, although it depends on the plate thickness, it seems that notches of 2 to 4 mm are necessary at a plate thickness of 7 mm.

(Operation) Next, the operation characteristics when the above brush type seal means 4 is used will be described. (A) FIG. 2 shows a normal state in which the floating roof 2 is suspended in the liquid in the tank 1. In this state, the tank 1 is closed by the floating roof 2 floating on the liquid and the tank seal 25, and the weather seal device 3 shields the gap between the side wall inner surface 1 a and the floating roof 2. . In other words, the weather seal device 3 has a shielding action that firstly projects obliquely upward while being supported on the upper surface side of the floating roof 2 and is provided on the distal end side so as to slidably contact the side wall inner surface 1a. This is the same as in the prior art in that it is performed by the weather hood 30 having 33. In addition, the weather seal device 3 has the brush-type seal means 4 described above, and the seal means 4 is combined with the weather hood 30 in a state of being supported via the arm 39, the holder 5 and the like. The tip of the elastic material 7 or 8 is slidably in contact with the side wall inner surface 1 a from the upper side of the bent portion 33.

(B) That is, the brush-type sealing means 4 uses a large number of elastic materials 7 or 8 and is combined in multiple so as to have a predetermined thickness, and at least the tip side is a brush-like shape in which the lines 11 or pieces 18a are collected. Therefore, even if the side wall inner surface 1a is uneven or dirty with deposits, it is always easy to be in close contact with the arc-shaped side wall inner surface 1a. This point is clear when compared with the method using a single elastic plate of Patent Document 1. That is, in the configuration of one wide elastic plate as in Patent Document 1, a gap is likely to be generated between the inner surface 1a of the circular arc side wall even if the elastic plate. On the other hand, in the configuration in which the wires 11 or the pieces 18a are gathered, it is easy to become familiar with the arc of the side wall inner surface 1a, and the gap with the side wall inner surface 1a is absorbed accordingly.

(C) FIG. 2 (c) is a diagram assuming that rainwater sprayed on the side wall inner surface 1a of the tank 1 flows along the side wall inner surface 1a due to wind and rain. In the case of the brush-type sealing means 4, it flows along a large number of brush-like lines 11 in contact with the tank side wall inner surface 1 a or the pieces 18 a of the plate material 18, and rainwater is similar to that of thatched roof. It is guided to the side of the holder 5 and the arm 39 that are separated from the side wall inner surface 1a by the action. In this structure, even if rainwater passes through the brush-like tip of the upper seal means 4, the rainwater is guided to the outside along the brush shape of the lower seal means 4 from the opening 5 a of the flow holder 5. Moreover, even if rainwater passes through the brush shape of the lower sealing means 4, it is received by the receiving plate 9 and guided to the outside.

(D) FIG. 3A shows the normal state of the floating roof 2 as in FIG. 2, and FIG. 3B shows the state in which the floating roof 2 has moved in the direction of the arrow in FIG. In the weather seal device 3 described above, when the floating roof 2 moves in the horizontal direction, the inclination angle increases from d1 to d2. In other words, when the weather seal device 3 has a steep inclination such as the inclination angle d1, the arm 39 moves away from the stopper 37, and when the weather sealing apparatus 3 becomes gentle as the inclination angle d2, the arm 39 approaches the stopper 37 and finally moves. Abut. In this structure, both are devised so that the center of gravity of the holder 5 comes to the side wall inner surface 1a side from the bearing tool 38, whereby the brush-like shape of the sealing means 4, that is, the tip of the elastic material 7 or 8 is pressed to the side wall inner surface 1a side. This prevents the spring plate from being indispensable as shown in FIG. 9A and the excessive load from the elastic plate tip.

(E) FIG. 4 schematically shows a process in which the floating roof 2 is raised by the liquid introduced into the tank 1. It is assumed that irregularities and deposits are formed on the tank side wall inner surface 1a. FIG. 4 (a) shows that an abnormal load is applied to the tip of the elastic material 7 or 8 (a large number of lines 11 or a part of the piece 18a) due to unevenness or catching on the deposits while the floating roof 2 is rising. The case where the holder 5 is drawn toward the side wall inner surface 1a side is shown. In this structure, even in such a case, the receiving plate 9 is in contact with the side wall inner surface 1a to prevent scooping. 4 (b) is, FIGS. 4 (a) further elastic member 7 or 8 from the front end (a part of a number of lines 11 and strip 18a) when is caught in the side wall inner surface 1a side of the receiving plate 9 is a view that assumes. In this structure, the elastic material 7 or 8 increases the reaction force (force to return to the original shape) when the tip of the elastic material 7 or 8 (a part of the large number of wires 11 or the pieces 18a) is inserted to some extent. As shown by the imaginary line in FIG. 4C, the rotation is reversed by the reaction force and the arm 39 hits the stopper 37 so that the rotation stops. Thereafter, the elastic material 7 or 8 returns to the initial state as shown by the solid line in FIG.

  Note that the present invention only has to have the configuration specified in the claims, and the details can be variously changed or developed according to the purpose with reference to the above description of the embodiments. As an example, the sealing means 4 may be configured to support only one elastic material 7 or 8 on the holder 5, and conversely to support two or more. When two or more are supported, the elastic material 7 and the elastic material 8 of different types may be combined in addition to the elastic material 7 (8) of the same type.

1 ... Storage tank (1a is side wall inner surface)
2 ... Floating roof (21 is a mounting bracket, 26 is a holder)
3. Weather seal device (30 is weather hood, 31 is support bracket)
4 ... Sealing means 5 ... Holder (13 to 15 are connecting plate portions, 5a and 5b are openings)
6 ... retainer (16 is a groove, 16a is a nail)
7: Elastic material (11 is a wire, 12 is a base or fixed part)
8 ... Elastic material (18 is a plate material, 18a is a piece, 18b is a slit)
9 ... Receiver plate 25 ... Tank seal 33 ... Seal guide (33a is a mounting portion, 33b is a bent portion)
37 ... Stopper

Claims (6)

A weather hood having a bent portion that protrudes obliquely upward while being supported on the upper surface side of the floating roof that floats on the liquid in the storage tank, and that is provided on the tip side and slidably contacts the inner surface of the tank side wall By the weather seal device that shields the gap between the tank side wall inner surface and the floating roof,
A plurality of elastic materials are used and combined in multiple layers so as to have a predetermined thickness, and at least the tip side is formed into a brush shape in which lines or pieces are collected, and the rear end side is provided with a brush-type sealing means attached to a holder. And
The weather seal device, wherein the elastic material tip abuts against an inner surface of the tank side wall from above the bent portion in a state where the seal means is supported by the weather hood.   The weather seal device according to claim 1, wherein the elastic material is a wire.   The weather seal device according to claim 1, wherein the elastic member is a plate member divided into a plurality of pieces through a slit except for a base end side.   The weather seal device according to any one of claims 1 to 3, further comprising a holder that detachably holds one or more of the sealing means.   The weather seal device according to claim 4, further comprising an arm that is swingably connected to the weather hood, wherein the holder is detachably connected to the arm.   A floating roof that is used in a substantially bottomed cylindrical tank for storing a liquid such as crude oil and is floated on the liquid in the tank. The float is attached to the floating roof and floated on the liquid. The floating roof of the storage tank provided with the weather seal apparatus in any one of Claim 1 to 5 with the tank seal arrange | positioned between a roof periphery and the said tank side wall inner surface.

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