JP5438990B2 - Sloshing suppression device and tank - Google Patents

Description

  The present invention relates to a sloshing suppressing device and a tank capable of suppressing the oscillation of liquid generated in the tank.

  In a tank that stores liquid therein, for example, the liquid stored in the tank may sway and oscillate during an earthquake. Such liquid behavior is hereinafter referred to as liquid sloshing. As a technique for suppressing sloshing of the liquid stored in the tank, for example, Patent Document 1 discloses a floating roof type storage tank in which a spring mechanism is installed on a floating roof that floats on the liquid surface of the liquid. ing.

JP-A-2005-330011

  In the technique disclosed in Patent Document 1, the sloshing of the liquid is suppressed by the spring mechanism generating a spring force due to the displacement difference between the floating roof and the weight caused by the rising or lowering of the floating roof. That is, in the technique disclosed in Patent Document 1, the spring mechanism acts as a damper to suppress liquid sloshing.

  However, as the tank becomes larger and the mass of liquid stored in the tank increases, the amount of spring force required for the spring mechanism also increases. That is, as the mass of the liquid stored in the tank increases, the size of the spring mechanism increases or the number of required spring mechanisms increases. Thus, in the technique disclosed in Patent Document 1, the apparatus for suppressing the sloshing of the liquid is increased in size.

  This invention is made | formed in view of the above, Comprising: It aims at suppressing the sloshing of the liquid stored in a tank, suppressing the enlargement of an apparatus.

In order to solve the above-described problems and achieve the object, a sloshing suppression device according to the present invention includes a circular float provided in contact with a liquid stored in a cylindrical tank, and a swing with respect to the float. A heel attached to the float via a joint so as to be movable, and a weight attached to the heel, wherein the joint is attached to the center of the float in the radial direction and is attached to the central axis of the side of the tank The rod is supported so as to be able to swing in all orthogonal directions, and the radial size of the float is smaller than the radial size of the side portion, and the radial size of the side portion. The liquid level of the liquid can be seen from above the tank between the float and the side of the tank .

In order to solve the above-described problems and achieve the object, the tank according to the present invention stores a liquid in a cylindrical space surrounded by a side portion and a bottom portion and is provided in contact with the liquid. A float attached to the float via a joint so as to be able to swing relative to the float, and a weight attached to the collar, the joint being attached to the radial center of the float , Supporting the heel so that it can swing in all directions orthogonal to the central axis of the side portion, and the radial size of the float is smaller than the radial size of the side portion, It is formed so as to be more than half the size of the side portion in the radial direction, and the liquid level of the liquid can be seen from above the tank between the float and the side portion of the tank .

  With the above-described configuration, the sloshing suppression device and the tank according to the present invention are swung by receiving energy from the liquid in which the float is sloshing, and the heel and the weight are swung. As the pendulum starts swinging, the rod and weight swing in the liquid in the tank, and thus receive drag from the liquid.

  Thereby, the swinging of the heel and the weight is attenuated. In this way, a part of the energy in the sloshing is consumed for the liquid in the tank to swing the bag and the weight. Thereby, the sloshing suppression device can suppress the sloshing of the liquid as much as the part of the energy is consumed for swinging the bag and the weight.

  In the prior art, the sloshing of the liquid is suppressed by a force acting in the direction opposite to the direction in which the liquid swings. Therefore, the conventional technology increases the size of the apparatus so that the force is not insufficient.

  However, the sloshing suppression device having the above-described configuration suppresses the sloshing of the liquid by swinging the heel and the weight together with the liquid. The sloshing suppression device can suppress the sloshing of the liquid by, for example, 3% to 7% with respect to the mass of the sloshing liquid and the mass of the sludge. Thus, the sloshing suppression device can suppress the enlargement of the device and can also suppress the sloshing of the liquid.

In a preferred embodiment of the present invention, the rod is that the rod is attached to the float through the joint to generate a predetermined frictional force at the time of swinging relative to the float is desirable.

  Here, even if the joint is configured not to generate a predetermined frictional force when the heel swings with respect to the float, the sloshing suppressing device can swing the heel and the weight. This is because when the liquid is sloshing, the float actually moves in a direction crossing the central axis of the tank along the liquid surface.

  Accordingly, the sloshing suppression device can swing the heel and the weight even when the joint does not generate a predetermined frictional force when the heel swings with respect to the float. As a result, since the sloshing suppression device consumes a part of the energy for sloshing the liquid for swinging the ridge and the weight, the sloshing of the liquid can be suppressed.

  However, as in the above configuration, when the joint generates a predetermined frictional force when the heel swings with respect to the float, the sloshing suppression device receives the moment from the float through the joint. . Thereby, the sloshing suppression device can transmit more energy when the liquid is sloshing from the float to the bag. Therefore, the sloshing suppression device can more appropriately suppress the sloshing of the liquid as much energy is consumed for swinging the bag and the weight.

  As a preferred aspect of the present invention, it is desirable that the joint supports the rod so that the rod can swing in all directions orthogonal to the central axis of the side portion of the tank.

  Here, the sloshing suppression device may include, for example, a joint that supports the heel so that the heel can swing only in a predetermined direction. Even in this case, when the liquid sloshing in the predetermined direction, the sloshing suppression device causes the ridge and the weight to swing in the predetermined direction. Thereby, the sloshing suppression device can suppress sloshing of the liquid.

  However, the more the wrinkles can be swung, the more opportunities the sloshing suppression device can suppress the sloshing of the liquid. Therefore, as in the above configuration, when the sloshing suppression device includes a joint that supports the scissors so that the scissors can swing in all directions, the sloshing of the liquid can be more suitably suppressed.

  As a preferred aspect of the present invention, the distance from the base of the heel and the float to the center of gravity of the heel and the weight is the vibration frequency of the liquid that causes sloshing in the tank. It is desirable to set the length equal to the number.

  Here, the number of times the liquid swings per unit time varies depending on the shape of the tank and the distance from the liquid level to the bottom of the tank. Hereinafter, the number of oscillations per unit time is referred to as the frequency. That is, the frequency of the liquid varies depending on the tank in which the sloshing suppression device is provided.

  With the above configuration, the sloshing suppression device according to the present invention adjusts the distance from the base of the heel and the float to the center of gravity of the heel and the weight according to the tank to be installed, and the heel and the weight Is set. Therefore, the sloshing suppression device can suppress the sloshing of the liquid more suitably.

  As a preferred aspect of the present invention, it is desirable that the heel is provided with heel length adjusting means for changing the length of the heel in the central axis direction.

  With the above-described configuration, the sloshing suppression device according to the present invention adjusts the distance from the base of the heel and the float to the center of gravity of the heel and the weight even after being installed in the tank, The frequency of the heel and the weight is adjusted. Therefore, the sloshing suppression device can suppress the sloshing of the liquid more suitably.

  As a preferred aspect of the present invention, it is desirable that at least one of the rod and the weight is attached with a damping force adjusting member in which a hole through which the liquid in the tank passes is formed.

  As a preferred aspect of the present invention, it is desirable that at least one of the basket and the weight is formed with a hole through which the liquid in the tank passes.

  When the damping force adjusting member is attached to the heel or the weight, the sloshing suppression device is a liquid that is generated when the heel and the weight swing in the liquid as the liquid passes through the holes of the damping force adjusting member, for example, the mesh. Increased drag due to Thereby, the sloshing suppression device can attenuate the swing of the heel and the weight earlier.

  In addition, since the liquid passes through the mesh, the damping force adjusting member can reduce an increase in load mass of the heel and the weight when the heel and the weight swing. Thus, the sloshing suppression device according to the present invention suppresses the drag due to the liquid generated when the heel and the weight swing in the liquid while suppressing the possibility that the distance between the joint and the center of gravity of the heel and the weight changes. Can be increased.

  As a preferred aspect of the present invention, the weight is preferably a container into which the liquid in the tank is guided.

  Here, when the sloshing suppression device is installed in the tank, the inside of the weight constituted by the container as described above is empty. Therefore, the sloshing suppression device when installed in the tank has a smaller mass than the sloshing suppression device having a metal weight, for example. With the configuration described above, the sloshing suppression device can be more easily installed in the tank by using the sloshing suppression device according to the present invention.

  The present invention can suppress sloshing of the liquid stored in the tank while suppressing an increase in the size of the apparatus.

FIG. 1 is a cross-sectional view showing a tank and a sloshing device cut in an imaginary plane including a central axis of a side portion. FIG. 2 is a projection view of the tank and the sloshing device projected from the ceiling to the bottom of the tank. FIG. 3 is a cross-sectional view showing how the weight swings. FIG. 4 is a cross-sectional view of the tank and is a cross-sectional view for explaining the difference between the damper mechanism and the pendulum mechanism. FIG. 5 is a cross-sectional view of the heel length adjusting mechanism taken along an imaginary plane including the central axis of the heel. FIG. 6 is a cross-sectional view of another heel length adjusting mechanism cut along an imaginary plane including the center axis of the heel. FIG. 7 is a configuration diagram illustrating a sloshing suppression device to which a mesh member is attached. FIG. 8 is a configuration diagram illustrating a sloshing suppression device including a weight in which a through hole is formed. FIG. 9 is a cross-sectional view illustrating the sloshing device according to the second embodiment.

  Hereinafter, embodiments of a sloshing suppression device and a tank according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a cross-sectional view showing a tank and a sloshing device cut in an imaginary plane including a central axis of a side portion. FIG. 2 is a projection view of the tank and the sloshing device projected from the ceiling to the bottom of the tank. The tank 900 shown in FIG. 1 can suppress the sloshing of the liquid stored inside by providing the sloshing suppressing device 100.

  Here, the sloshing suppression device 100 may be manufactured together with the tank 900 as a part of the tank 900 when the tank 900 is newly constructed, or may be attached to the existing tank 900 later. First, the configuration of the tank 900 will be described.

  A tank 900 shown in FIG. 1 includes a side portion 910, a ceiling 920, and a bottom portion 930. The side part 910 is formed in a cylindrical shape, for example, as shown in FIG. In the tank 900, for example, the central axis CL of the side portion 910 is provided along the vertical direction. The ceiling 920 is provided in the opening on one side of the side portion 910. The bottom portion 930 is provided in the opening on the other side of the side portion 910.

  In this way, in the tank 900, a space surrounded by the side portion 910, the ceiling 920, and the bottom portion 930 is formed. The tank 900 stores liquid in the space. The tank 900 is not limited to the one provided with the ceiling 920, for example, and may be configured such that liquid is stored in a space surrounded by the side portion 910 and the bottom portion 930 and the space is opened to the atmosphere.

  Next, the configuration of the sloshing suppression device 100 will be described. The sloshing suppression device 100 is configured to include a float 110, a collar 130, and a weight 150. The float 110 is disposed so as to float on the liquid surface, for example. Accordingly, when the liquid sloshings, the float 110 swings in accordance with the sloshing of the liquid.

  Here, the float 110 is not limited to the configuration floating on the liquid surface, and may be provided in contact with the liquid in the tank 900. For example, the float 110 may be soaked in a liquid. However, in general, as the sloshing of the liquid is closer to the liquid surface than the bottom 930 side, the amplitude becomes larger.

  In order to more appropriately suppress the sloshing of the liquid, it is preferable that the float 110 is provided at a position where the amplitude of the sloshing of the liquid becomes larger. Therefore, when the float 110 is immersed in the liquid, the distance from the liquid surface is preferably as small as possible.

  Further, the float 110 is formed such that the radial size of the float 110 is smaller than the radial size of the side portion 910 and is more than half the radial size of the side portion 910. This is because if the size of the float 110 in the radial direction is larger than the size of the side portion 910 in the radial direction, the float 110 may not be able to swing freely with the liquid in the tank 900. In addition, if the size of the float 110 in the radial direction is smaller than half the size of the side portion 910 in the radial direction, the contact area with the liquid is insufficient, and the float 110 may not swing with the liquid. It is.

  The collar 130 is attached to the float 110 via the universal joint 120, for example. The universal joint 120 is attached to the surface of the float 110 on the bottom 930 side. The universal joint 120 supports the collar 130 so that the collar 130 can swing in, for example, any direction with respect to the float 110.

  Here, all the directions specifically mean all directions orthogonal to the central axis CL shown in FIG. However, the universal joint 120 has a range in which the collar 130 cannot swing. For example, even if the eaves 130 try to swing toward the ceiling 920, the eaves 130 and the float 110 interfere with each other. Thereby, the eaves 130 cannot swing to the ceiling 920 side with respect to the float 110.

  Thus, even if there is a range where the members cannot physically swing due to interference between members, the universal joint 120 supports the rod 130 so that the rod 130 can swing in any direction with respect to the float 110, for example. Treat as what you want.

  Here, the universal joint 120 generates a predetermined frictional force when the rod 130 swings with respect to the float 110. That is, the universal joint 120 has a predetermined swing resistance. Thereby, in the sloshing suppression device 100, the moment when the float 110 swings is transmitted to the eaves 130 via the universal joint 120.

  The weight 150 is attached to the tip portion of the collar 130. The front end of the collar 130 is an end opposite to the end connected to the universal joint 120. As shown in FIGS. 1 and 2, the weight 150 is formed in a columnar shape, for example. With the above configuration, the sloshing suppression device 100 has a structure in which the ridge 130 and the weight 150 swing with respect to the float 110, that is, a so-called pendulum structure.

  The weight 150 is formed of metal, for example. The mass of the weight 150 is, for example, 3% to 7% of the mass of the sloshing liquid. Here, not all of the liquid stored in the tank 900 is sloshing, and the actual sloshing liquid is a part of the liquid stored in the tank 900, for example, 30% of the total liquid in the tank 900. 40%.

  FIG. 3 is a cross-sectional view showing how the weight swings. Next, the principle that the sloshing suppression device 100 can suppress the sloshing of the liquid will be described. As shown in FIG. 3, it is assumed that a part B of the liquid surface approaches the ceiling 920 and swings in the direction A so that a part C moves away from the ceiling 920. The part B and the part C are symmetric parts with respect to the central axis CL.

  In the sloshing suppression device 100, the float 110 swings in the direction A together with the liquid in accordance with the sloshing of the liquid. That is, a portion B side of the float 110 approaches the ceiling 920. Then, a moment is transmitted from the float 110 to the eaves 130 via the universal joint 120. As a result, the collar 130 and the weight 150 swing in the direction A with respect to the float 110.

  When the rod 130 and the weight 150 start to swing, the sloshing suppression device 100 swings using the rod 130 and the weight 150 as a pendulum. In this way, the sloshing suppression device 100 swings by receiving energy from the liquid sloshing the float 110, and the collar 130 receives the moment from the float 110 via the universal joint 120, so that the collar 130 and the weight 150 swing. Move.

  As the pendulum swings as the pendulum 130 and the weight 150 swing in the liquid, they receive drag from the liquid. Further, as described above, the universal joint 120 has a predetermined swing resistance. Accordingly, when the rod 130 and the weight 150 swing, the rod 130 and the weight 150 also receive a drag force from the universal joint 120. As a result, the swinging of the rod 130 and the weight 150 is attenuated.

  In this way, the liquid in the tank 900 is consumed because a part of the energy at the time of sloshing swings the basket 130 and the weight 150. Thereby, the sloshing suppression device 100 can suppress the sloshing of the liquid as much as the part of the energy is consumed for swinging the ridge 130 and the weight 150.

  Here, the shape of the weight 150 is not limited to a cylindrical shape. However, for example, when the weight 150 is a quadrangular prism, a difference occurs in the drag force that the ridge 130 and the weight 150 receive from the liquid depending on the direction in which the weight 150 swings. Therefore, the weight 150 is preferably formed in a columnar shape or a spherical shape.

  Thereby, even if the direction in which the weight 150 rock | fluctuates changes, the sloshing suppression apparatus 100 reduces the change of the shape of the weight 150 of the surface where the weight 150 receives a drag from a liquid. Thereby, even if the direction in which the weight 150 rock | fluctuates changes, the sloshing suppression apparatus 100 can reduce the variation | change_quantity of the drag which the weight 150 receives from a liquid.

  Here, in the sloshing suppression device 100, since the universal joint 120 has a predetermined swing resistance, the hook 130 is lifted via the universal joint 120 and receives a moment from the float 110, so that the hook 130 and the weight 150 swing.

  However, even if the universal joint 120 is configured not to generate a predetermined frictional force when the rod 130 swings with respect to the float 110, the sloshing suppression device 100 causes the rod 130 and the weight 150 to swing. Can do. This is because when the liquid is sloshing, the float 110 actually moves in the direction intersecting the central axis CL along the liquid surface.

  Accordingly, the sloshing suppression device 100 can swing the collar 130 and the weight 150 even when the universal joint 120 does not generate a predetermined frictional force when the collar 130 swings with respect to the float 110. it can. Therefore, since the sloshing suppression device 100 consumes a part of the energy for sloshing the liquid to swing the ridge 130 and the weight 150, the sloshing of the liquid can be suppressed.

  Here, the sloshing suppression device 100 has been described on the assumption that the universal joint 120 supports the heel 130 so that the heel 130 can swing in all directions, but, for example, the heel 130 can swing only in a predetermined direction. A joint supporting 130 may be provided.

  Even in this case, when the liquid sloshing in the predetermined direction, the sloshing suppression device 100 causes the ridge 130 and the weight 150 to swing in the predetermined direction. Thereby, the sloshing suppression apparatus 100 can suppress the sloshing of the liquid.

  However, the more the direction in which the ridge 130 can swing, the more opportunities the sloshing suppression device 100 can suppress the sloshing of the liquid. Therefore, it is preferable that the sloshing suppression device 100 includes the universal joint 120 that supports the scissors 130 so that the scissors 130 can swing in all directions.

  FIG. 4 is a cross-sectional view of the tank and is a cross-sectional view for explaining the difference between the damper mechanism and the pendulum mechanism. Here, the difference between the conventional damper mechanism and the pendulum mechanism will be described.

  As shown in FIG. 4, as the liquid in the tank 900 approaches the side portion 910, the vertical movement distance increases, and as the side 910 approaches the radial center, the vertical movement distance decreases. . As a result, the conventional damper mechanism cannot sufficiently reduce the sloshing of the liquid when the spring mechanism is provided at the radial center of the side portion 910, for example.

  However, in the sloshing suppression device 100 of this embodiment, for example, even when the collar 130 and the weight 150 are attached to the center in the radial direction of the side portion 910, the moment is transmitted from the float 110 via the universal joint 120. Can be suppressed.

  In the present embodiment, as shown in FIG. 2, the sloshing suppression device 100 has the universal joint 120 attached to the radial center of the side portion 910, that is, the radial center of the float 110, and the rod 130 and the weight 150. Is supported by the float 110.

  Here, in the sloshing suppressing device 100, for example, the universal joint 120 may be attached at a position deviated from the radial center of the float 110. The sloshing suppression device 100 may have a configuration in which a plurality of universal joints 120 are attached to the float 110 and a plurality of ridges 130 and weights 150 are supported by the float 110.

  In the case of the conventional damper mechanism, the sloshing of the liquid is suppressed by the spring force generated by the spring mechanism. Therefore, as the mass of the liquid in the tank increases, a spring mechanism that generates a larger spring force is required.

  That is, it is difficult for the conventional damper mechanism to sufficiently suppress liquid sloshing in a large tank. In addition, the conventional damper mechanism requires a larger apparatus in order to sufficiently suppress the liquid sloshing.

  However, the sloshing suppression device 100 of the present embodiment suppresses the sloshing of the liquid when the ridge 130 and the weight 150 swing together with the liquid. For example, the sloshing suppression device 100 can suppress the sloshing of the liquid even if the mass of the weight 150 is 3% to 7% with respect to the mass of the sloshing liquid. Thus, the sloshing suppression device 100 can suppress the enlargement of the device and can also suppress the sloshing of the liquid.

  Here, the frequency of the sloshing liquid varies depending on the shape of the tank 900. The shape of the tank 900 is, for example, the inner diameter of the tank 900, that is, the dimension from the central axis CL to the inner wall surface of the side portion 910. Further, the frequency of the sloshing liquid also changes depending on the dimension from the liquid level to the bottom 930.

  Therefore, the sloshing suppression device 100 is preferably set so that the vibration frequency of the ridge 130 and the weight 150 is equal to the vibration frequency of the sloshing liquid. Below, the structure for changing the frequency of the collar 130 and the weight 150 is demonstrated.

  The frequency of the heel 130 and the weight 150 varies depending on the distance from the base of the heel 130 and the float 110 to the center of gravity of the heel 130 and the weight 150. Therefore, in the sloshing suppression device 100, for example, the heel length adjusting mechanism 140 as the heel length adjusting means is provided on the heel 130. An example of the heel length adjusting mechanism 140 will be described below.

  FIG. 5 is a cross-sectional view of the heel length adjusting mechanism taken along an imaginary plane including the central axis of the heel. The heel length adjusting mechanism 140 is, for example, a screw mechanism as shown in FIG. The collar 130 is composed of two members, for example, a first member 131 and a second member 132. The heel length adjusting mechanism 140 includes a female screw 141 formed on the first member 131 and a male screw 142 formed on the second member 132.

  The heel length adjusting mechanism 140 connects the first member 131 and the second member 132 by screwing the male screw 142 into the female screw 141, and rotates the female screw 141 relative to the male screw 142. The axial length of the ridge 130 is changed.

  FIG. 6 is a cross-sectional view of another heel length adjusting mechanism cut along an imaginary plane including the center axis of the heel. The heel length adjusting mechanism 140 is not limited to a screw mechanism. For example, the heel length adjusting mechanism 140 is a slide mechanism. In this case, as shown in FIG. 6, the collar 130 includes two collars, an inner member 133 and a cylindrical outer member 134 having an inner diameter equivalent to the outer shape of the inner member 133. In the collar 130, the inner member 133 is fitted into the outer member 134.

  The heel length adjusting mechanism 140 includes an inner pin hole 143, an outer pin hole 144, and a stopper pin 145. The inner pin hole 143 is formed in the inner member 133. A plurality of outer pin holes 144 are formed in the outer member 134 in the central axis direction of the outer member 134. The stopper pin 145 is inserted into the inner pin hole 143 and one of the plurality of outer pin holes 144.

  Accordingly, the heel length adjusting mechanism 140 connects the inner member 133 and the outer member 134 and changes the axial length of the heel 130 by changing the outer pin hole 144 into which the stopper pin 145 is inserted. Let

  As described above, the sloshing suppression device 100 is provided with the heel length adjusting mechanism 140 in the heel 130, whereby the length of the heel 130 in the central axis direction changes. Thereby, the sloshing suppression apparatus 100 changes the distance to the gravity center of the ridge 130 and the weight 150. As a result, in the sloshing suppression device 100, the vibration frequency of the ridge 130 and the weight 150 is adjusted.

  Further, the sloshing suppression device 100 may be configured to be able to remove the heel 130 from the universal joint 120 without the heel length adjusting mechanism 140, for example. In this case, the sloshing suppression device 100 is replaced with another kite having a different length in the central axis direction, whereby the distance to the center of gravity of the kite 130 and the weight 150 is adjusted. Is adjusted.

  Here, as described above, the sloshing suppression device 100 attenuates the swing of the rod 130 and the weight 150 by the drag due to the liquid and the drag due to the swing resistance of the universal joint 120. Therefore, if the drag due to the liquid and the drag due to the swing resistance of the universal joint 120 are smaller than the appropriate magnitude, the time required for the swinging of the ridge 130 and the weight 150 to increase is increased.

  Then, the structure for adjusting the time required for the rocking | fluctuation of the collar 130 and the weight 150 to attenuate | damping is adjusted next by adjusting the magnitude | size of the drag by a liquid.

  FIG. 7 is a configuration diagram illustrating a sloshing suppression device to which a mesh member is attached. As shown in FIG. 7, the sloshing suppression device 100 is configured such that a damping force adjusting member is provided on at least one of the rod 130 and the weight 150.

  The damping force adjusting member is a mesh member 161, for example. The mesh member 161 is, for example, a tubular member formed in a mesh shape or a tubular member in which holes are formed in the side periphery. The shape of the net member 161 is not limited to a cylindrical shape.

  When the mesh member 161 is attached to the cage 130 or the weight 150, the sloshing suppression device 100 allows the fluid to pass through the mesh of the mesh member 161, so that when the mesh 130 and the mass 150 swing in the liquid, The drag force that the weight 150 receives from the liquid increases.

  Here, even if the member attached to the ridge 130 or the weight 150 is not a net-like member, for example, a flat plate in which no hole is formed, the drag force by the liquid increases. However, in this case, the mass of the liquid clinging to the collar 130 and the weight 150 also increases when the collar 130 and the weight 150 swing.

  As described above, the liquid clinging to the ridge 130 and the weight 150 when the ridge 130 and the weight 150 swing moves in the tank 900 together with the ridge 130 and the weight 150, and thus is added to the mass of the weight 150. . Thus, when the liquid clinging to the ridge 130 and the weight 150 increases, the additional mass of the ridge 130 and the weight 150 when the ridge 130 and the weight 150 swing is increased.

  Thereby, the position of the center of gravity of the collar 130 and the weight 150 changes. As a result, the distance from the universal joint 120 to the center of gravity of the heel 130 and the weight 150 may change, and the frequency of the heel 130 and the weight 150 may change.

  However, since the mesh member 161 allows the liquid to pass through the mesh, it is possible to reduce an increase in the load mass of the ridge 130 and the weight 150 when the ridge 130 and the weight 150 swing. Thereby, the net-like member 161 suppresses the possibility that the distance from the universal joint 120 to the center of gravity of the heel 130 and the weight 150 changes, and the heel 130 and the weight 150 when the heel 130 and the weight 150 swing in the liquid. The drag force 150 receives from the liquid can be increased.

  FIG. 8 is a configuration diagram illustrating a sloshing suppression device including a weight in which a through hole is formed. The sloshing suppression device 100 may be configured to include, for example, a through hole 162 shown in FIG. 8 instead of the mesh member 161.

  The through hole 162 is formed in at least one of the collar 130 and the weight 150. The through hole 162 is formed in a direction crossing the central axis of the collar 130. In the present embodiment, the through hole 162 is formed in the weight 150, for example, in a direction orthogonal to the central axis of the collar 130.

  Accordingly, when the ridge 130 and the weight 150 swing in the direction in which the through hole 162 is formed, the liquid passes through the through hole 162. Thereby, when the ridge 130 and the weight 150 swing in the liquid, the drag force that the ridge 130 and the weight 150 receive from the liquid increases.

  For example, a plurality of through holes 162 are preferably formed in different directions. As a result, the sloshing suppression device 100 increases the direction in which the drag received by the ridge 130 and the weight 150 from the liquid when the ridge 130 and the weight 150 are swung in the liquid.

  As described above, in the sloshing suppression device 100, the mesh member 161 shown in FIG. 7 is attached to at least one of the ridge 130 and the weight 150, or the through-hole 162 shown in FIG. By forming at least one of them, the magnitude of the drag that the ridge 130 and the weight 150 receive from the liquid can be adjusted, and the time required for the swinging of the ridge 130 and the weight 150 to be attenuated can be adjusted.

(Embodiment 2)
FIG. 9 is a cross-sectional view illustrating the sloshing device according to the second embodiment. The sloshing suppression device 200 of the second embodiment shown in FIG. 9 is different from the sloshing suppression device 100 of the first embodiment in the configuration of the weight. The sloshing suppression device 200 includes a container-type weight 250.

  The container mold weight 250 is a container having a hollow inside. A liquid introduction hole 251 that connects the inside and the outside of the container mold weight 250 is formed in the container mold weight 250. The container-type weight 250 is attached with a lid 252 that closes the liquid introduction hole 251.

  The sloshing suppression device 200 is installed in the tank 900 with the lid 252 being removed from the liquid introduction hole 251. As a result, when the container mold weight 250 is introduced into the liquid, the sloshing suppression device 200 guides the liquid into the container mold weight 250 through the liquid introduction hole 251. Next, in the sloshing suppression device 200, the lid 252 is attached to the liquid introduction hole 251, and the liquid introduction hole 251 is closed.

  When the jar 130 and the container mold weight 250 swing, the liquid in the container mold weight 250 also moves in the tank 900 together with the container mold weight 250. As described above, the sloshing suppression device 200 can use the mass of the liquid in the container mold weight 250 as the additional mass of the container mold weight 250.

  Here, when the sloshing suppression device 200 is installed in the tank 900, the container-type weight 250 is empty as described above. Therefore, the sloshing suppression device 200 when installed in the tank 900 has a smaller mass than the sloshing suppression device 100 of the first embodiment. Thereby, if the sloshing suppression apparatus 200 is used, the sloshing suppression apparatus 200 can be installed in the tank 900 more easily.

  The sloshing suppression device 200 may not be configured to include the lid 252. When the lid 252 is not attached to the liquid introduction hole 251, the liquid in the container mold weight 250 flows into and out of the container mold weight 250 through the liquid introduction hole 251. Thereby, the additional mass of the container-type weight 250 changes. However, for example, if the size of the liquid introduction hole 251 is designed to be sufficiently small, the sloshing suppression device 200 can sufficiently reduce the change in the added mass.

  As described above, the sloshing suppression device and the tank according to the present invention are useful for suppressing the sloshing of the liquid stored in the tank, and particularly suppress the sloshing of the liquid stored in the large tank. Suitable for that.

DESCRIPTION OF SYMBOLS 100 Sloshing suppression apparatus 110 Floating 120 Universal joint 130 １３１ 131 First member 132 Second member 133 Inner member 134 Outer member 140 棹 Length adjustment mechanism 141 Female screw 142 Male screw 143 Inner pin hole 144 Outer pin hole 145 Stopper pin 150 Weight 161 Net member 162 Through-hole 200 Sloshing suppression device 250 Container-type weight 251 Liquid introduction hole 252 Lid 900 Tank 910 Side 920 Ceiling 930 Bottom A direction B Partial C Partial CL Central axis

Claims (8)

A circular float provided in contact with the liquid stored in a cylindrical tank;
A hook attached to the float via a joint so that it can swing relative to the float;
A weight attached to the heel,
The joint is attached to the center of the float in the radial direction , and supports the rod so that it can swing in all directions perpendicular to the central axis of the side of the tank,
The size of the float in the radial direction is smaller than the size in the radial direction of the side portion, and is formed to be more than half of the size in the radial direction of the side portion, and between the float and the side portion of the tank. A sloshing suppression device characterized in that the liquid level of the liquid is visible from above the tank . The bag is
The sloshing suppression device according to claim 1, wherein the sloshing is attached to the float via the joint that generates a predetermined frictional force when the heel swings with respect to the float. The distance from the base of the heel and the float to the center of gravity of the heel and the weight is:
Said rod and frequency of the weight is, the anti-sloshing device according to claim 1 or claim 2, characterized in that it is set to a length equal to the frequency of the liquid sloshing in the tank. The bag is
The sloshing suppression device according to any one of claims 1 to 3 , further comprising a heel length adjusting means for changing a length of the heel in the central axis direction. At least one of the heel and the weight is
The sloshing suppression device according to any one of claims 1 to 4 , wherein a damping force adjusting member in which a hole through which the liquid in the tank passes is formed. At least one of the heel and the weight is
The sloshing suppression device according to any one of claims 1 to 5 , wherein a hole through which the liquid in the tank passes is formed. The weight is
The sloshing suppression device according to any one of claims 1 to 6 , wherein the sloshing suppression device is a container into which the liquid in the tank is guided. Store the liquid in a cylindrical space surrounded by the side and bottom,
A circular float provided in contact with the liquid;
A hook attached to the float via a joint so that it can swing relative to the float;
A weight attached to the heel,
The joint is attached to the center in the radial direction of the float, and supports the heel so that it can swing in all directions perpendicular to the central axis of the side part,
The size of the float in the radial direction is smaller than the size in the radial direction of the side portion, and is formed to be more than half of the size in the radial direction of the side portion, and between the float and the side portion of the tank. A tank having a size allowing the liquid level of the liquid to be seen from above the tank.

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