JP2011184079A - Sloshing suppressing device installed in fixed roof type storage tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sloshing suppressing device installed in a fixed roof type storage tank, which is carried in the fixed roof type storage tank in a folded manner, and easily developed in the storage tank and installed in the storage tank, and capable of preventing occurrence of any situation that a roof part is broken by suppressing the occurrence of a considerably large wave even when a considerably large wave (the vertical motion of the liquid level) occurs on the liquid surface in the storage tank by a severe sloshing phenomenon caused by an unexpectedly large earthquake. <P>SOLUTION: The sloshing suppressing device, carried in the fixed roof type storage tank in a folded manner, and then, easily developed in the storage tank and installed in the storage tank, keeps an expandable spindle member fixed to a base, and a plurality of sloshing suppression plates radially mounted on the circumferential surface of an upper part of the spindle member. The sloshing suppression plate is formed by fixing a long hanging plate to the lower face of a long horizontal plate. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  According to the present invention, in a fixed roof type storage tank containing various liquids such as oil, a part of the liquid stored in the storage tank is stored in the storage tank due to a severe sloshing phenomenon caused by a large earthquake. The present invention relates to a sloshing suppression device installed in a fixed-roof storage tank that prevents the occurrence of a situation that hits the roof portion and damages the roof portion.

  As a storage tank for storing various liquids such as oil, there is a fixed roof type storage tank T as shown in FIGS. The fixed roof type storage tank T is often used as a liquid containing a small volume of liquid as compared with a floating roof type storage tank.

  In this fixed roof type storage tank T, even if a small wave is generated in the liquid W in the storage tank T due to a sloshing phenomenon caused by a relatively minor earthquake, the roof portion is caused by the generated wave. In order to prevent the occurrence of a situation such as breakage and to sufficiently cope with this, a predetermined interval is maintained between the liquid surface and the roof portion.

nothing special

  However, in the fixed roof type storage tank T, although it can cope with the sloshing phenomenon caused by a relatively minor earthquake, the roof portion is damaged due to a severe sloshing phenomenon caused by a large earthquake exceeding expectations. There was a situation that would happen.

  The sloshing phenomenon occurs when a storage tank T containing a large amount of liquid W is subjected to an earthquake motion caused by an earthquake, and the liquid level in the storage tank T sways and sways due to the earthquake motion. Up and down movement) occurs, but when a large earthquake that exceeds expectations occurs, the storage tank T co-seismics with this seismic motion, and extremely large waves (up and down of the liquid level) appear on the liquid level in the storage tank T. Movement) may occur.

  When such a large wave (up and down movement of the liquid level) occurs along the inner wall surface of the storage tank T, a large amount of liquid W is pushed up toward the roof portion of the storage tank T as shown in FIG. It will be like a state.

  Then, a large amount of the liquid W pushed upward collides with the roof portion vigorously, resulting in a situation where the roof portion is damaged.

  As a measure for preventing breakage of the roof portion due to such a sloshing phenomenon, for example, as shown in FIG. 9, there is a measure for attaching a predetermined lattice mechanism 100 to the upper portion of the storage tank T close to the roof portion. The lattice mechanism 100 is obtained by assembling horizontally long plate members having a predetermined height in a lattice shape and dividing the entire space of the upper portion of the storage tank T into small sections.

  The lattice mechanism 100 guides the liquid surface in the storage tank T to the lattice mechanism 100 when a large wave (vertical movement of the liquid surface) is generated on the liquid surface in the storage tank T due to a sloshing phenomenon caused by an earthquake. Then, the liquid W that tries to vigorously collide with the roof portion of the storage tank T is received by the plurality of small sections, and the kinetic energy of the entire liquid W is dispersed for each of the small sections. Has the ability to weaken power.

  However, such a measure for providing the lattice mechanism 100 is effective if it is taken from the beginning of construction as in a new plant, but in an existing plant, the lattice mechanism 100 is newly added to the inside of the storage tank T. Additional construction to install is necessary, and a large amount of construction costs will be required.

  In addition, since the fixed roof type storage tank T has only a small hole such as a manhole as a communication port (entrance / exit), it is a great restriction when carrying in equipment used for construction.

  Therefore, the present invention was created in view of the existing circumstances as described above, and is carried in a state of being folded into a fixed roof type storage tank, and then easily deployed in the storage tank to be stored in the storage tank. This is a case where the sloshing suppression device installed in the inside causes an extremely large wave (up-and-down movement of the liquid level) to occur in the liquid level in the storage tank due to a severe sloshing phenomenon caused by a large earthquake exceeding expectations. However, an object of the present invention is to provide a sloshing suppression device installed in a fixed roof type storage tank that suppresses the occurrence and prevents the occurrence of a situation where the roof portion is damaged.

  The present invention is a sloshing suppression device that is carried into a fixed roof storage tank in a folded state, and then easily deployed in the storage tank and installed in the storage tank. The main shaft member is fixed to the base. And the subject mentioned above was solved by attaching the several sloshing suppression board radially to the surrounding surface of the upper part in this main shaft member.

  Moreover, the sloshing suppression board solved the problem mentioned above similarly by fixing the long drooping board to the lower surface of a long horizontal board.

  Furthermore, the sloshing suppression plate is in a folded state arranged along the main shaft member via a shaft stopping mechanism and in a deployed state arranged in a horizontal direction so as to be orthogonal to the main shaft member. Solved the problem mentioned above.

  In addition, the shaft stopping mechanism is in a state in which a plurality of ring members provided at the base end portion of the fixing plate of the sloshing suppression plate, a plurality of ring members provided on the peripheral surface of the main shaft member, and both ring members are fitted. The above-described problem is solved by the shaft member that is inserted so as to penetrate each ring member.

  In addition, the sloshing suppression plate has solved the above-described problem by maintaining a state in which the sloshing suppressing plate is disposed in the horizontal direction so as to be orthogonal to the main shaft member via the deployment fixing portion.

  The deployment fixing portion is located above the shaft stopping mechanism, and includes a screw hole provided on the peripheral surface of the main shaft member, a screw hole provided on the distal end side of the fixing plate of the sloshing suppression plate, and both screw holes. The cover member with screw holes covering both screw hole parts from above with the bolts matched, and the bolts screwed into the screw holes in the cover member, the screw holes in the fixing plate, and the screw holes in the main shaft member As a result, the above-mentioned problem has been solved.

  The present invention is a sloshing suppression device that is carried into a fixed roof storage tank in a folded state, and then easily deployed in the storage tank and installed in the storage tank. The main shaft member is fixed to the base. In addition, since a plurality of sloshing suppression plates are radially attached to the upper peripheral surface of the main shaft member, when the sloshing suppression devices are deployed in the storage tank and each sloshing suppression plate is deployed, it may exceed expectations. It is possible to prevent the occurrence of a situation in which a remarkably large wave (up and down movement of the liquid level) is generated on the liquid level in the storage tank due to a severe sloshing phenomenon caused by a large earthquake and the roof portion is damaged.

  Specifically, when the sloshing suppression device is installed in the storage tank and each sloshing suppression plate is developed, the liquid level in the storage tank is divided into a plurality of substantially triangular sections.

  Therefore, when a large wave (up-and-down movement of the liquid level) is about to occur on the liquid level in the storage tank due to the sloshing phenomenon due to the earthquake, the liquid level in the storage tank is formed by each sloshing suppression plate. The liquid which is introduced into the compartments of the storage tank and vigorously collides with the roof portion of the storage tank is received by the plurality of substantially triangular compartments, and the kinetic energy of the entire liquid is distributed to the compartments. It weakens the impact force of the liquid.

  Further, since the sloshing suppression plate is formed by fixing the long drooping plate to the lower surface of the long horizontal plate, the drooping plate forming a plurality of substantially triangular sections has a predetermined depth. Therefore, the kinetic energy of the entire liquid, which tries to vigorously collide with the roof portion of the storage tank, can be efficiently dispersed for each section.

  Furthermore, since the sloshing suppression plate is in a folded state arranged along the main shaft member via the shaft stopping mechanism, the communication port (entrance / exit) which is a hole of a manhole existing in the fixed roof type storage tank Thus, the sloshing suppression device can be easily carried into the storage tank.

  In addition, the sloshing suppression plate is in a deployed state in which the sloshing suppression plate is disposed in a horizontal direction so as to be orthogonal to the main shaft member via the shaft stop mechanism. It is possible to efficiently disperse the kinetic energy of the entire liquid that is about to collide vigorously.

  In addition, since the procedure for carrying in the storage tank and the procedure for deployment in the storage tank are relatively easy, the time for installing the sloshing suppression device in the storage tank can be shortened.

  In addition, the entire sloshing suppression device can be constructed at low cost.

  In addition, measures can be taken afterwards in response to severe sloshing phenomenon caused by a large earthquake in an existing storage tank.

  In addition, the shaft stopping mechanism is in a state in which a plurality of ring members provided at the base end portion of the fixing plate of the sloshing suppression plate, a plurality of ring members provided on the peripheral surface of the main shaft member, and both ring members are fitted. Since the shaft member is inserted so as to penetrate each ring member, the sloshing suppression plate can smoothly transition from the folded state to the expanded state and from the expanded state to the folded state.

  Furthermore, since the sloshing suppression plate maintains the state of being arranged in the horizontal direction so as to be orthogonal to the main shaft member via the deployment fixing portion, the sloshing suppression plate arranged in the horizontal direction allows the storage tank to It is possible to efficiently disperse the kinetic energy of the entire liquid that tries to strike the roof portion of the liquid.

  The deployment fixing portion is located above the shaft stopping mechanism, and includes a screw hole provided on the peripheral surface of the main shaft member, a screw hole provided on the distal end side of the fixing plate of the sloshing suppression plate, and both screw holes. The cover member with screw holes covering both screw hole parts from above with the bolts matched, and the bolts screwed into the screw holes in the cover member, the screw holes in the fixing plate, and the screw holes in the main shaft member Therefore, the state in which the sloshing suppression plate is arranged in the horizontal direction can be reliably maintained.

It is a perspective view which shows the structure of the sloshing suppression apparatus which fixes the main shaft member to a base, and has attached eight sloshing suppression plates to the upper peripheral surface in this main shaft member radially. It is a partially expanded perspective view which shows the folding state of the sloshing suppression apparatus which fixed the base end part of the sloshing suppression board to the main shaft member, and has arrange | positioned the sloshing suppression board along the main shaft member. It is a side view which shows the expansion | deployment state of the sloshing suppression apparatus which has arrange | positioned the sloshing suppression board in the horizontal direction so that it may orthogonally cross with respect to a main shaft member. It is a perspective view of the sloshing suppression device which shows the state in the middle of developing the sloshing suppression board. It is a perspective view of the sloshing suppression device which shows the deployment state which has arranged the sloshing suppression board in the horizontal direction so as to be perpendicular to the main shaft member. It is sectional drawing of the partial enlargement of the sloshing suppression apparatus which shows the expansion | deployment state which has arrange | positioned the sloshing suppression board in the horizontal direction so that it may orthogonally cross with respect to a main shaft member. It is a perspective view which shows the state which has installed the sloshing suppression apparatus in the storage tank in the state which has arrange | positioned the sloshing suppression board in a horizontal direction. It is a schematic explanatory drawing which shows the state where a large amount of liquid is pushed up toward the roof part vigorously on the inner wall surface of the storage tank. It is a perspective view which shows the state which has attached the predetermined | prescribed lattice mechanism to the upper part of the storage tank near a roof part as a measure which prevents the damage of the roof part by a sloshing phenomenon.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated in detail with reference to drawings.

  The present invention is a sloshing suppression device 1 that is carried in a state of being folded into a fixed roof storage tank T, and then easily deployed in the storage tank T and installed in the storage tank T.

  As shown in FIG. 1, the sloshing suppression device 1 fixes a main shaft member 3 that can be expanded and contracted to a base 2, and a plurality of sloshing suppression plates 4 are attached to an upper peripheral surface of the main shaft member 3.

  As shown in FIG. 2, the sloshing suppression plate 4 has a base end portion fixed to the main shaft member 3, and a folded state arranged along the main shaft member 3, and as shown in FIG. 3, the main shaft member 3. It maintains the unfolded state arranged in the horizontal direction so as to be orthogonal to.

  As shown in FIG. 1, the base 2 stably maintains the state where the main shaft member 3 to which the plurality of sloshing suppression plates 4 are attached stands. The base 2 is formed by a circular plate 5 having a predetermined thickness and a plurality of stabilizing plates 6 attached to the circular plate 5.

  Four stabilizing plates 6 are formed in a rectangular plate shape, and four stabilizing plates 6 are attached to the side surface of the circular disk 5 at equal intervals. Further, the stabilizer 6 is attached to the circular disk 5 so as to be able to advance and retreat. Specifically, as shown in FIG. 6, a sliding contact hole 7 is provided in the circular plate 5, and the stabilizing plate 6 is accommodated in the sliding contact hole 7.

  The sliding contact hole 7 is provided from the side surface portion of the circular disk 5 toward the center of the circular disk 5. Further, the sliding contact hole 7 is formed in a rectangular hole shape into which the stabilizing plate 6 can be inserted and accommodated.

  When the base end side portion of the stabilizing plate 6 is inserted into the sliding contact hole 7, the outer peripheral surface of the stabilizing plate 6 comes into contact with the inner peripheral surface of the sliding contact hole 7 so that the stabilizing plate 6 is slid in the sliding contact hole 7. Is ready to move. Therefore, the stabilizing plate 6 can maintain the state of projecting long from the circular plate 5 as shown in FIG. 1 and the state of slightly projecting from the circular plate 5 as shown in FIG.

  As shown in FIGS. 1 and 3, the main shaft member 3 to which the plurality of sloshing suppression plates 4 are attached includes a support pipe 8 having a predetermined length fixed to the center portion of the base 2, and the support pipe 8. It is formed by a connected moving pipe 9. The moving pipe 9 has substantially the same length as the support pipe 8.

  Moreover, the moving pipe 9 is provided with the hollow part 10 which can accommodate the outer peripheral surface of the support pipe 8, as shown in FIG. The moving pipe 9 accommodates the support pipe 8 in its own hollow portion 10 through the lower opening so that the outer peripheral surface of the support pipe 8 and the inner peripheral surface of the hollow portion 10 of the moving pipe 9 slide. It touches. Therefore, the moving pipe 9 is formed so that it can move along the longitudinal direction of the support pipe 8 and can expand and contract the entire length of the main shaft member 3.

  Further, the main shaft member 3 includes a support pipe 8 and a length fixing portion 11 that maintains the longest main shaft member 3 in the moving pipe 9 connected to the support pipe 8.

  As shown in FIG. 6, the length fixing portion 11 includes a screw hole 8 a of the support pipe 8, a screw hole 9 a of the moving pipe 9, and a screw hole 8 a. It is comprised by the volt | bolt B screwed into 9a.

  Specifically, a plurality of (for example, four) screw holes 8 a are provided in the peripheral wall at the top of the support pipe 8. Correspondingly, a plurality of (for example, four) screw holes 9a are also provided in the peripheral wall at the lower portion of the moving pipe 9.

  Then, with the screw holes 8a and 9a matched, the male screw member of the bolt B is screwed into the screw hole 8a of the support pipe 8 and the screw hole 9a of the moving pipe 9, and the main shaft member 3 is made the longest. To maintain.

  In addition, you may form the main shaft member 3 so that length adjustment is possible by providing the support pipe 8 with a screw hole (8a) so that it may become a multistage.

  As shown in FIG. 1, eight sloshing suppression plates 4 are attached to the upper peripheral surface of the main shaft member 3 at approximately equal intervals.

  The sloshing suppression plate 4 is formed by fixing a drooping plate 13 on the lower surface of a long horizontal plate 12. The hanging plate 13 is formed in a rectangular plate shape having substantially the same length as the horizontal plate 13 when viewed from the side. The drooping plate 13 has a predetermined height in the lateral direction.

  And the drooping board 13 is being fixed to the approximate center in the lower surface of the horizontal board 12, and when the sloshing suppression board 4 is seen from the front-end | tip part side, it becomes a substantially T shape.

  Further, as shown in FIG. 2, a rectangular fixing plate 14 is connected to the base end portions of the horizontal plate 12 and the hanging plate 13. The fixing plate 14 has a base end portion located near the lower portion of the hanging plate 13. Further, the distal end portion of the fixed plate 14 is formed so as to slightly protrude from the horizontal plate 12.

  As shown in FIG. 2, at the base end portion of the fixing plate 14, three ring members 16 as the shaft stopping mechanism 15 are provided along the side surface in the short direction of the fixing plate 14. On the other hand, two ring members 17 as the shaft locking mechanisms 15 are also provided on the peripheral surface in the upper part of the moving pipe 9 constituting the main shaft member 3.

  Then, in a state where the ring member 16 provided on the fixed plate 14 of the sloshing suppression plate 4 is fitted to the ring member 17 of the moving pipe 9, the shaft member 19 having the head 18 is attached to each of the ring members 16 and 17. The base end portion of the sloshing suppression plate 4 is attached to the main shaft member 3 by inserting the shaft member 19 so that the tip end portion protrudes from the ring members 16 and 17 and attaching the fixing nut 19a.

  Through the shaft stop mechanism 15, the sloshing suppression plate 4 is moved in the horizontal direction so as to be orthogonal to the main shaft member 3 shown in FIG. 3 from the folded state arranged along the main shaft member 3 shown in FIG. It is possible to move within an angle range of about 90 degrees so as to maintain the deployed state.

  Further, the main shaft member 3 and the sloshing suppression plate 4 are provided with a deployment fixing portion 20 for maintaining the state in which the sloshing suppression plate 4 is disposed in a horizontal direction so as to be orthogonal to the main shaft member 3.

  As shown in FIG. 6, the unfolding fixing portion 20 matches the screw holes 9 b provided in the moving pipe 9, the screw holes 14 a provided in the fixing plate 14 of the sloshing suppression plate 4, and both screw holes 9 b and 14 a. The cover member 21 (having the screw hole 21a) covering the screw holes 9b and 14a from above, the screw hole 21a of the cover member 21, the screw hole 14a of the fixing plate 14, and the moving pipe 9 are provided. The bolt B is screwed into the screw hole 9b.

  Specifically, as shown in FIG. 6, a plurality of (for example, eight) screw holes 9b are equally spaced on the peripheral wall near the upper end opening of the moving pipe 9 above the shaft stop mechanism 15 of the moving pipe 9. Provided. The screw hole 9b is present at a position where the tip of the fixing plate 14 of the sloshing suppression plate 4 contacts.

  Further, the fixing plate 14 of the sloshing suppression plate 4 is also provided with a screw hole 14a. The screw hole 14 a is present in a portion 22 protruding from the horizontal plate 12 in the fixing plate 14 of the sloshing suppression plate 4. The screw hole 14 a of the sloshing suppression plate 4 matches the screw hole 9 b of the moving pipe 9 when the sloshing suppression plate 4 is arranged in the horizontal direction so as to be orthogonal to the main shaft member 3.

  As shown in FIG. 6, the cover member 21 closes the cylindrical member 23 having a height that can accommodate the portion 22 protruding from the horizontal plate 12 of the fixed plate 14 and the upper end portion of the cylindrical member 23. The top plate member 24 is fixed. The cover member 21 has a lower end opened by a cylindrical opening. In addition, a plurality of (for example, eight) screw holes 21 a are provided on the peripheral wall of the cylindrical member 23 at equal intervals.

  And the sloshing suppression board 4 is arrange | positioned in the horizontal direction, and the screw hole 9b of the movement pipe 9 and the screw hole 14a of the sloshing suppression board 4 are made to correspond. In this state, the cover member 21 is put on the upper end opening of the moving pipe 9 and the portion 22 protruding from the horizontal plate of the fixed plate 14. At this time, the screw hole 21a of the cover member 21, the screw hole 14a of the sloshing suppression plate 4, and the screw hole 9b of the moving pipe 9 are matched.

  And the male screw member of the volt | bolt B is screwed in the screw hole 21a, 14a, 9b which agree | coincides, and the state which has arrange | positioned the sloshing suppression board 4 in the horizontal direction in the main shaft member 3 is maintained.

  The sloshing suppression plate 4 is disposed in the horizontal direction, and the male screw member of the bolt B is screwed into the screw holes 14a and 9b in a state where the screw hole 9b of the moving pipe 9 and the screw hole 14a of the sloshing suppression plate 4 are aligned. But it doesn't matter.

  Below, the procedure which carries in the sloshing suppression apparatus 1 in the storage tank T of a fixed roof type | mold, and the procedure which expand | deploys the sloshing suppression apparatus 1 in the storage tank T after that is demonstrated.

  The operation of carrying the sloshing suppression device 1 into the fixed roof type storage tank T and deploying the sloshing suppression device 1 in the storage tank T is performed in a situation where the liquid W does not exist in the storage tank T.

  First, when the sloshing suppression device 1 is carried into the fixed roof storage tank T, the sloshing suppression device 1 is folded as shown in FIG.

  Specifically, in the base 2, most of the stabilizing plate 6 is accommodated in the sliding contact hole 7, and the tip of the stabilizing plate 6 protrudes slightly from the circular plate 5.

  Further, in the main shaft member 3, the entire support pipe 8 is accommodated in the hollow portion 10 of the moving pipe 9 to maintain the shortest state of the main shaft member 3.

  Further, as shown in FIG. 2, the sloshing suppression plate 4 is in a folded state arranged along the main shaft member 3. In the folded state of the sloshing suppression device 1, the sloshing suppression device 1 is carried into the storage tank T through a communication port (entrance / exit) that is a hole of a manhole existing in the fixed roof type storage tank T.

  Next, as shown in FIG. 4, in the storage tank T, the stabilization plate 6 accommodated in the sliding contact hole 7 of the circular plate 5 is pulled out, and the stabilization plate 6 protrudes long from the circular plate 5. To do.

  Further, in the main shaft member 3, the moving pipe 9 is moved upward to align the screw hole 9a of the moving pipe 9 with the screw hole 8a of the support pipe 8, and the male screw member of the bolt B is screwed into both the screw holes 9a and 8a. The main shaft member 3 is kept in the longest state.

  Furthermore, as shown in FIG. 4, the sloshing suppression plate 4 is developed in the horizontal direction.

  Then, as shown in FIG. 5, the sloshing suppression plate 4 is moved in a horizontal direction orthogonal to the main shaft member 3, and the screw hole 14 a of the sloshing suppression plate 4 is moved to the screw hole 9 b of the moving pipe 9. To match.

  In this state, as shown in FIG. 6, the cover member 21 is put on the upper end opening of the moving pipe 9 and the portion 22 protruding from the horizontal plate 12 of the fixed plate 14, and the screw holes 21 a of the cover member 21 are It matches with the screw hole 14a of the sloshing suppression plate 4.

  Finally, as shown in FIGS. 1 and 6, the male screw member of the bolt B is screwed into the matching screw holes 21a, 14a, and 9b, and the sloshing suppression plate is disposed in the horizontal direction in the main shaft member 3. It keeps the state of being.

  And as shown in FIG. 7, in the state which the stable plate 6 protruded long from the circular disk 5, the state which made the main shaft member 3 the longest, and also the state which has arrange | positioned the sloshing suppression board 4 in a horizontal direction The sloshing suppression device 1 is installed in the storage tank T.

  At this time, the entire length of the two sloshing suppression plates 4 arranged in a straight line substantially coincides with the inner diameter of the storage tank T.

  In this manner, the liquid W is put into the storage tank T in the state where the sloshing suppression device 1 is installed in the storage tank T. The amount of the liquid W is set so that the liquid level reaches the highest position permitted in operation in the storage tank T.

  In the sloshing suppression device 1 installed in the storage tank T, the long horizontal plate 12 of the sloshing suppression plate 4 is located near the liquid level of the liquid W accommodated in the storage tank T. . Further, the drooping plate 13 of the sloshing suppression plate 4 causes the middle of the drooping plate 13 to be submerged in the liquid W in the liquid W accommodated in the storage tank T.

  Thus, by installing the sloshing suppression device 1 in the storage tank T, as shown in FIG. 7, the liquid level in the storage tank T is in a state of being divided into approximately triangular eight sections. .

  Therefore, when a large wave (up-and-down movement of the liquid level) is generated on the liquid level in the storage tank T due to the sloshing phenomenon caused by the earthquake, the liquid level in the storage tank T is formed by each sloshing suppression plate 4. The liquid W, which is introduced into the eight compartments and is about to collide with the roof of the storage tank T vigorously, is received by the entire eight triangular sections, and the kinetic energy of the entire liquid W is dispersed for each compartment. Thus, the collision force of the liquid W against the roof portion is weakened.

  The sloshing suppression device for a fixed roof type storage tank according to the present invention has a remarkably large wave (up-and-down motion of the liquid surface) in the storage tank in various fields due to severe sloshing phenomenon caused by a large earthquake. ) Can be widely used to prevent the occurrence of a situation where the roof portion is damaged by suppressing the occurrence of the phenomenon.

T ... Storage tank of fixed roof type W ... Liquid B ... Bolt 100 ... Lattice mechanism 1 ... Sloshing suppression device 2 ... Base 3 ... Main shaft member 4 ... Sloshing suppression plate 5 ... Circular plate 6 ... Stabilizing plate 7 ... Sliding contact hole 8 ... support pipe 8a ... screw hole 9 ... moving pipe 9a ... screw hole 9b ... screw hole 10 ... hollow part 11 ... length fixing part 12 ... horizontal plate 13 ... drooping plate 14 ... fixing plate 14a ... screw hole 15 ... shaft stopping mechanism DESCRIPTION OF SYMBOLS 16 ... Ring member 17 ... Ring member 18 ... Head 19 ... Shaft member 19a ... Fixing nut 20 ... Deployment fixing | fixed part 21 ... Cover member 22 ... The part 21a protruded from a horizontal plate ... Screw hole

Claims (6)

  It is a sloshing suppression device that is carried into a fixed roof storage tank in a folded state, and then easily deployed in the storage tank and installed in the storage tank. The main shaft member is fixed to the base, and this main shaft A sloshing suppression device installed in a fixed roof type storage tank, wherein a plurality of sloshing suppression plates are radially attached to an upper peripheral surface of a member.   The sloshing suppression device installed in the fixed roof type storage tank according to claim 1, wherein the sloshing suppression plate is formed by fixing a long drooping plate to a lower surface of a long horizontal plate.   The sloshing suppression plate is in a folded state arranged along the main shaft member and a developed state arranged in a horizontal direction so as to be orthogonal to the main shaft member via the shaft stopping mechanism. The sloshing suppression device installed in the fixed roof storage tank as described.   The shaft stop mechanism includes a plurality of ring members provided at the base end portion of the fixed plate of the sloshing suppression plate, a plurality of ring members provided on the peripheral surface of the main shaft member, and a state in which both ring members are fitted. The sloshing suppression apparatus installed in the fixed roof type storage tank according to claim 3, wherein the sloshing is configured by a shaft member that is inserted so as to penetrate the ring member.   The sloshing suppression plate is installed in the fixed roof type storage tank according to claim 1 or 2, wherein the sloshing suppression plate maintains a state of being arranged in a horizontal direction so as to be orthogonal to the main shaft member via the deployment fixing portion. Sloshing suppression device.   The deployment fixing part is located above the shaft stop mechanism, and the screw hole provided on the peripheral surface of the main shaft member and the screw hole provided on the tip end side of the fixing plate of the sloshing suppression plate coincide with both screw holes. In this state, a cover member having a screw hole covering both screw hole portions from above and a bolt screwed into a screw hole of the cover member, a screw hole of the fixing plate, and a screw hole provided in the main shaft member are configured. The sloshing suppression apparatus installed in the fixed roof type storage tank according to claim 5.

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