Tank unit and energy dissipation mechanism

Abstract

This invention provides a tank unit and energy dissipation mechanism that reduces the force of the fluid flowing into the tank from above, thereby suppressing water splashing from the tank and reducing surface ripples, enabling accurate testing and measurement, and allowing for miniaturization. [Solution] The tank unit 100 is located inside the tank 1 and includes a power dissipation mechanism 2 positioned close to the side wall of the tank 1. The power dissipation mechanism 2 is positioned so as to overlap with a portion of the supply piping 4 when viewed from above, and includes an annular plate member 21 and a plurality of support members 22 that support the annular plate member 21 when viewed from above.

Description

Technical Field

[0001] The present invention relates to a tank unit and a damping mechanism.

Background Art

[0002] Conventionally, a tank unit and a damping mechanism have been known (see, for example, Patent Document 1).

[0003] Patent Document 1 discloses a neutralization device (tank unit) for alkaline waste liquid, which includes a treatment tank (tank) and a waste liquid supply pipe for supplying waste liquid to the treatment tank. The waste liquid stored in the treatment tank is configured to adjust the pH by supplying gas.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Although not disclosed in Patent Document 1 above, in a tank unit including a tank, when a fluid is supplied to the tank from above and then a test or measurement is performed on the fluid flowing in the tank, there are cases where the size of the tank is not appropriate for the flow velocity and the amount of the fluid supplied to the tank from above, resulting in a strong flow of the fluid, water splashing out of the tank, and the water surface of the tank being wavy. Therefore, it may be difficult to obtain accurate test results and measurement results. Also, in order to obtain accurate test results and measurement results, it is necessary to increase the size of the tank, such as increasing the distance to the measuring part or increasing the tank volume. Therefore, it is desired to weaken the flow of the fluid supplied to the tank from above, suppress the splashing of water from the tank, suppress the waviness of the water surface, and miniaturize the tank unit.

[0006] This invention was made to solve the above-mentioned problems, and one objective of this invention is to provide a tank unit and energy dissipation mechanism that can be miniaturized and enable accurate testing and measurement by reducing the force of the fluid flowing into the tank from above, thereby suppressing splashing of water from the tank and suppressing ripples on the water surface. [Means for solving the problem]

[0007] In order to achieve the above objective, the inventors of this invention conducted research and found that by arranging an annular plate member and support members that support the annular plate member close to the side wall of the tank, the annular plate member not only provides resistance to the upward flow of fluid due to the side wall of the tank, but also generates vortices, weakening the force of the fluid flow and stabilizing the water surface. That is, the tank unit in the first aspect of this invention comprises a tank through which fluid flows, a supply pipe that supplies fluid to the tank from above, and a pressure dissipation mechanism arranged inside the tank and close to the side wall of the tank, wherein the pressure dissipation mechanism is arranged so as to overlap with a part of the supply pipe in a top view, and includes an annular plate member that is annular in a top view, and a plurality of support members that support the annular plate member.

[0008] In the tank unit according to the first aspect of this invention, as described above, a force dissipation mechanism is provided, which is arranged inside the tank and close to the side wall of the tank. The force dissipation mechanism is arranged so as to overlap with a part of the supply piping when viewed from above, and includes an annular plate member and a plurality of support members that support the annular plate member when viewed from above. In the case of a conventional tank unit without a force dissipation mechanism, the fluid supplied to the tank from above flows downward and also flows upward along the side wall of the tank near the bottom. At this time, pulled by the strongly downward-flowing fluid being supplied, some of the fluid flows downward and some flows downstream. Also, a vortex is formed below the tank. However, if the force of the fluid flowing upward along the tank wall is strong, and the center of the vortex generated below is located close to the side wall of the tank, far from the supply piping, and it is not able to sufficiently draw in the fluid flowing upward, an upward flow will occur near the water surface, causing turbulence on the water surface. On the other hand, when a force dissipation mechanism is provided as in the present invention, the fluid supplied to the force dissipation mechanism from above flows downward inside the annular plate member and upward along the side wall of the tank outside the annular plate member. However, the annular plate member acts as resistance to the flow, weakening the momentum of the upward-flowing fluid and forming a vortex below the tank. As a result, the center of the vortex, which was located near the side wall of the tank, moves towards the supply pipe, and the strong downward flow from the supply pipe pulls more fluid downward, and the fluid being pulled downward increases in velocity (gains in momentum). At the same time, a portion of the upward flow weakened by the annular plate member is pulled by the strong downward flow and flows inward along the annular plate member, generating multiple small vortices along the annular plate member. Furthermore, by generating small vortices from a portion of the upward flow using the annular plate member, the center of the vortex, which was located near the side wall of the tank, can be moved towards the supply pipe. This weakens the momentum of the upward flow of fluid while strengthening the momentum of the downward flow of fluid, causing the flow to turn downward even near the water surface, thus reducing turbulence on the water surface.Furthermore, the downward-flowing fluid flows outward along the upper surface of the annular plate member, creating resistance to the upward-flowing fluid along the side wall of the tank. This contributes to the generation of small vortices, thus weakening the force of the fluid flow. As a result, by weakening the force of the fluid supplied to the tank from above, splashing of water from the tank is suppressed, and surface ripples are reduced, enabling accurate testing and measurement, and allowing for miniaturization. Here, "annular" is a concept that includes not only circles but also polygons. Also, "proximity" includes cases where objects are in contact with each other, and cases where objects are not in contact but are in close proximity.

[0009] In the tank unit according to the first aspect described above, preferably, the annular plate member is formed in an annular or polygonal shape when viewed from above. With this configuration, the larger the total length of the sides of the annular plate member, the larger the vortex that can be generated along the sides, thereby further weakening the force of the fluid flow.

[0010] In the tank unit according to the first aspect described above, preferably, a plurality of annular plate members are provided from the bottom surface of the tank, spaced apart from each other in the vertical direction. With this configuration, the annular plate members act as resistance to the fluid flowing upward, generating vortices between the bottom surface of the tank and the annular plate members, and between the plurality of annular plate members. As a result, more vortices are generated, and the force of the fluid flow can be weakened.

[0011] In the tank unit according to the first aspect described above, preferably, a plurality of dispersion partition plates are further provided, which are connected to a plurality of support members and are arranged to extend along the vertical direction. With this configuration, when a fluid flowing downward flows laterally (horizontally) along the bottom surface of the tank, the plurality of dispersion partition plates act as resistance, thereby weakening the force of the fluid flow. In addition, since the fluid can be dispersed by the plurality of dispersion partition plates and flow onto the annular plate member, multiple vortices can be generated, further weakening the force of the fluid flow.

[0012] In this case, preferably, the system further includes a central member positioned at the center of the annular plate member, with a plurality of dispersion partition plates arranged at predetermined angular intervals along the outer circumferential surface of the central member, the central member being columnar in shape, and having through holes extending in the vertical direction. With this configuration, the fluid whose flow force is weakened by the central member can be flowed radially around the central member when viewed from above, and the dispersion partition plates can force the fluid to flow at predetermined angular intervals, thereby effectively directing the fluid toward the annular plate member. Furthermore, the central member can be constructed using a cylindrical pipe or the like, thus simplifying the construction of the central member.

[0013] In the tank unit according to the first aspect described above, preferably, the tank has a partition plate that divides the inside of the tank and has a height greater than or equal to the height from the bottom surface of the tank to the lowest annular plate member, and the energy dissipation mechanism is arranged close to the partition plate. With this configuration, the energy dissipation mechanism can be placed in the area enclosed by the partition plate and the tank wall, so that the partition plate acts as resistance to the flow and weakens the force of the fluid flow. Furthermore, because the partition plate has a height greater than or equal to the height from the bottom surface of the tank to the lowest annular plate member, vortices are generated by the annular plate member before the fluid is supplied to a height above the partition plate, further weakening the force of the fluid flowing into the tank.

[0014] In a configuration in which multiple annular plate members are provided, preferably, a shielding member is further provided to cover the sides between the multiple annular plate members. With this configuration, the gap between the multiple annular plate members can be reduced, which increases the resistance of the fluid flowing laterally, making it easier to generate vortices and easily weakening the force of the flowing fluid. In addition, since an upward flow is formed along the shielding member, vortices can be generated even in parts of the energy dissipation mechanism that are not close to the side wall of the tank, thereby weakening the force of the flowing fluid.

[0015] In the tank unit according to the first aspect described above, preferably, the energy dissipation mechanism further includes a lid member that covers a portion of the opening of the annular plate member. With this configuration, the area of ​​the portion that resists the upward-flowing fluid is increased by providing the lid member, thereby generating a large (strong) vortex within the energy dissipation mechanism. As a result, the force of the flowing fluid can be effectively weakened.

[0016] In the tank unit according to the first aspect described above, preferably, a measuring unit is further provided, which is arranged in the tank or the drainage piping that drains water from the tank and acquires data on the fluid. With this configuration, the force of the fluid flow is weakened by the annular plate member and the water surface is stabilized before the fluid reaches the measuring unit, thereby suppressing any impact on the measurement results at the measuring unit.

[0017] The energy dissipation mechanism in the second aspect of this invention is an energy dissipation mechanism positioned close to the side wall of a tank to which fluid is supplied from above by a supply pipe, and the energy dissipation mechanism is positioned so as to overlap a part of the supply pipe in a top view and includes an annular plate member which is annular in a top view, a plurality of support members which support the annular plate member spaced apart from the bottom surface of the tank, a plurality of dispersion partition plates which are connected to the support members and are positioned so as to extend in a direction intersecting the direction along the vertical direction of the tank, and a central member positioned at the center of the annular plate member, wherein a plurality of annular plate members are provided spaced apart from each other in the vertical direction from the bottom surface of the tank, the plurality of dispersion partition plates are arranged at predetermined angular intervals along the outer circumferential surface of the central member, the central member is columnar and has a through hole extending in the vertical direction.

[0018] In the energy dissipation mechanism according to the second aspect described above, as described above, an energy dissipation mechanism is provided which is arranged inside the tank and close to the side wall of the tank. The energy dissipation mechanism is arranged so as to overlap with a part of the supply piping when viewed from above, and includes an annular plate member which is an annular shape when viewed from above, and a plurality of support members which support the annular plate member while it is spaced apart from the bottom surface of the tank. In the case of a conventional tank unit without an energy dissipation mechanism, the fluid supplied to the tank from above flows downward and also flows upward along the side wall of the tank near the bottom surface. At this time, a vortex is formed below the tank, pulled by the strongly downward-flowing fluid being supplied. However, because the force of the fluid flowing upward along the tank wall is strong, the center of the vortex generated below is located far from the supply piping and close to the side wall of the tank, and it is not able to sufficiently draw in the fluid flowing upward due to the strong downward flow from the supply piping. As a result, an upward flow remains near the water surface, causing turbulence on the water surface. On the other hand, when a force dissipation mechanism is provided as in the present invention, the fluid supplied to the force dissipation mechanism from above flows downward inside the annular plate member and upward along the side wall of the tank outside the annular plate member. However, the annular plate member acts as resistance to the upward-flowing fluid, weakening the momentum of the upward-flowing fluid and forming a vortex below the tank. As a result, the center of the vortex moves from near the side wall of the tank closer to the supply pipe, and the strong downward flow from the supply pipe pulls more fluid downward, increasing the velocity of the downward-pulling fluid. At this time, multiple small vortices are generated along the annular plate member. In other words, a portion of the upward flow is converted into small vortices, and the center of the vortex, which was located near the side wall of the tank, moves towards the supply pipe. This weakens the momentum of the upward-flowing fluid while strengthening the momentum of the downward-pulling fluid, causing the flow to shift downward even near the water surface, and reducing turbulence on the water surface. Furthermore, the multiple dispersion partitions act as resistance when the fluid flows from downwards to laterally along the bottom of the tank, thereby weakening the force of the fluid flow. In addition, the multiple dispersion partitions allow the fluid to be dispersed and flow through the annular plate member, generating multiple vortices and further weakening the force of the fluid flow.As a result of these, by weakening the flow momentum of the fluid supplied to the tank from above, splashing of water from the tank is suppressed, and by suppressing the rippling of the water surface, accurate tests and measurements can be enabled and miniaturization can be achieved.

Advantages of the Invention

[0019] According to the present invention, as described above, by weakening the flow momentum of the fluid supplied to the tank from above, splashing of water from the tank is suppressed, and by suppressing the rippling of the water surface, accurate tests and measurements can be enabled and miniaturization can be achieved.

Brief Description of the Drawings

[0020] [Figure 1] It is a perspective view showing the overall configuration of a tank unit according to the first embodiment. [Figure 2] It is a perspective view of a momentum-reducing mechanism according to the first embodiment. [Figure 3] It is a top view showing the positional relationship between the momentum-reducing mechanism and the supply pipe according to the first embodiment. [Figure 4] It is a diagram for explaining the flow of fluid according to the first embodiment. [Figure 5] It is a perspective view of a momentum-reducing mechanism according to the second embodiment. [Figure 6] It is a top view of a momentum-reducing mechanism according to the second embodiment. [Figure 7] It is a side view showing an example of a momentum-reducing mechanism according to the third embodiment. [Figure 8] It is a top view showing another example of a momentum-reducing mechanism according to the third embodiment. [Figure 9] It is a schematic diagram of a momentum-reducing mechanism according to a modification.

Modes for Carrying Out the Invention

[0021] Hereinafter, embodiments will be described based on the drawings.

[0022] [First Embodiment] The tank unit of the first embodiment will be described with reference to Figures 1 to 4.

[0023] The tank unit 100 shown in Figure 1 comprises a tank 1, a pressure dissipation mechanism 2, and a measurement unit 3. The tank unit 100 is, for example, a test device for acquiring fluid data. Since it becomes difficult to obtain accurate data if the test device becomes turbulent, it is required to be kept turbulent. In this embodiment, the vertical direction is defined as the Z direction, with the upper side being the Z1 side and the lower side being the Z2 side. In addition, one of the horizontal directions perpendicular to the vertical direction is defined as the X direction, with the side of the tank 1 where the weir 14 described later is provided being the X2 side (downstream side), and the opposite side being the X1 side (upstream side). The direction perpendicular to the X and Z directions is defined as the Y direction. Note that the description of the fluid is omitted in the tank unit 100 shown in Figure 1.

[0024] Tank 1 has an open top (it has an opening on its top surface). In other words, Tank 1 is configured so that atmospheric pressure acts on the water surface. Fluid is supplied to Tank 1 from above (Z1 side) and flows to the X2 side. Also, Tank 1 is configured so that the supplied fluid flows through its interior. The fluid is, for example, water. Tank 1 is, for example, rectangular in shape when viewed from above. Fluid is supplied to Tank 1 from above by supply piping 4.

[0025] Tank 1 includes a first compartment 11, a second compartment 12, a partition plate 13, and a weir 14. The first compartment 11 is located on the X1 side, and the second compartment 12 is located on the X2 side. The first compartment 11 is configured to receive fluid from above via a supply pipe 4. The first compartment 11 is configured to store fluid in the area enclosed by the partition plate 13 and the wall of the tank 1. Furthermore, when the height from the bottom surface of the first compartment 11 to the water surface of the fluid becomes greater than or equal to the height of the partition plate 13, the fluid is configured to flow into the second compartment 12. In the first embodiment, Tank 1 is configured by dividing a single water tank into a first compartment 11 and a second compartment 12 by a partition plate 13. Alternatively, Tank 1 is configured by a water tank with varying bottom heights.

[0026] The second compartment 12 is configured to discharge the fluid that flows in from the first compartment 11 to the outside. The second compartment 12 is a compartment for conducting tests and the like. A flow straightening grid for straightening the fluid flow may also be placed in the second compartment 12.

[0027] The partition plate 13 is used to partition the tank 1. The partition plate 13 is configured to partition the tank 1 into a first compartment 11 and a second compartment 12. The height of the partition plate 13 is greater than or equal to the height from the bottom surface of the tank 1 to the lowest annular plate member 21. Preferably, the height of the partition plate 13 is less than or equal to the height of the energy dissipation mechanism 2 and greater than or equal to the height of the central annular plate member 21.

[0028] The weir 14 is located on the X2 side of the second section 12. The weir 14 is positioned to hold fluid in the second section 12. If the weir 14 is a wall, it may be configured to be drained by piping and a pump, and a flow meter may be attached to the piping. Alternatively, if the weir 14 is a wall, a supply pipe 4 may be connected to the second section 12, forming a closed-loop system for fluid circulation. Furthermore, if the flow rate is measured by allowing the fluid to overflow the weir 14, the fluid that overflows the weir 14 may flow directly into the drain outlet. When allowing overflow, the shape of the weir 14 is not particularly limited; for example, it may be a full-width weir or a triangular weir.

[0029] As shown in Figures 1 and 2, the energy dissipation mechanism 2 is located inside the tank 1, close to the side wall and partition plate 13 that constitute the first section 11 of the tank 1. In other words, the energy dissipation mechanism 2 is located in the space separated by the wall and partition plate 13 of the tank 1, and the installed energy dissipation mechanism 2 can be replaced with another energy dissipation mechanism 2, and its positional relationship with the wall of the tank 1 can be adjusted. It is preferable that the energy dissipation mechanism 2 is close to at least the wall on the X1 side of the multiple walls of the tank 1. The energy dissipation mechanism 2 includes a plurality of annular plate members 21 and a plurality of support members 22. By providing the energy dissipation mechanism 2, the fluid flows downward inside the annular plate members 21 and upward along the side wall of the tank 1 outside the annular plate members 21. Then, the fluid flowing upward on the outside of the annular plate member 21 has its momentum weakened because the annular plate member 21 acts as resistance, and is pulled by the strong downward-flowing fluid from the supply pipe 4, generating a large vortex that flows between the upper and lower ends of the energy dissipation mechanism 2. In addition, because the momentum of the upward-flowing fluid is weakened by the annular plate member 21, small vortices are also generated between the multiple annular plate members 21 as the upward-flowing fluid is pulled by the strong downward-flowing fluid. In this way, the energy dissipation mechanism 2 can weaken the momentum of the flowing fluid by generating many vortices.

[0030] As shown in Figures 2 and 3, the multiple annular plate members 21 are arranged so as to overlap a portion of the supply pipe 4 when viewed from above. In the first embodiment, the centers of the multiple annular plate members 21 coincide with the centers of the supply pipe 4. The multiple annular plate members 21 are annular when viewed from above. More specifically, the multiple annular plate members 21 are formed in an annular or polygonal shape when viewed from above. In other words, the annular shape is not limited to an annular shape. In the first embodiment, the multiple annular plate members 21 are annular in shape and have a width R1 in the radial direction. Preferably, when viewed from above, the width R1 of the annular plate member 21 is 20% or more of the inner diameter R2 of the supply pipe 4. The multiple annular plate members 21 are provided in a plurality from the bottom surface of the tank 1, spaced apart from each other in the vertical direction. In the first embodiment, there are three annular plate members 21. A circumferential gap is formed between the multiple annular plate members 21 arranged in a vertical direction.

[0031] As shown in Figure 2, the support members 22 are configured to support a plurality of annular plate members 21 while spaced apart from the bottom surface of the tank 1. Specifically, the support members 22 are attached to the lower surface of the uppermost annular plate member 21 and the upper surface of the lowermost annular plate member 21, and are also attached to the annular plate member 21 positioned between the uppermost and lowermost annular plate member 21. Multiple support members 22 are arranged at predetermined intervals along the circumferential direction of the annular plate member 21.

[0032] The lowest annular plate member 21 contacts the bottom surface of the tank 1 when the energy dissipation mechanism 2 is positioned on the bottom surface of the tank 1. In another example, the lowest annular plate member 21 may be replaced with a circular disc.

[0033] As shown in Figure 1, the measurement unit 3 is located near the weir 14. The measurement unit 3 is configured to acquire data related to the fluid. This data includes, for example, the fluid level (water surface height). The measurement unit 3 includes a scale, a water level gauge, a pressure gauge, etc.

[0034] The supply pipe 4 is configured to supply fluid to the tank 1 from above. The supply pipe 4 may be equipped with, for example, a pump, a valve, etc. A fluid supply tank (not shown) is connected to the supply pipe 4. In the first embodiment, one supply pipe 4 is provided.

[0035] (Fluid flow) Figure 4 is a schematic diagram showing a cross-section of the tank unit 100 in Figure 1. As indicated by the thick arrows in Figure 4, the fluid supplied to the first compartment 11 of the tank 1 flows toward the bottom of the tank 1. The fluid that flows toward the bottom spreads in the X direction on the bottom surface, as indicated by the dashed arrows in Figure 4. It flows beyond the annular plate member 21 toward the wall side of the tank 1. As indicated by the dashed arrows, the fluid that flows along the bottom surface of the tank toward the side wall and partition plate material 13 of the tank 1 flows from bottom to top along the wall and partition plate material 13 of the tank 1. The fluid that flows upward loses momentum (velocity), some of the fluid flows downstream, and some of the fluid flows downward, pulled by the downward-flowing fluid supplied from the supply pipe 4. As a result, the fluid forms a vortex that flows vertically between the upper and lower ends of the energy dissipation mechanism 2. Furthermore, a portion of the fluid flowing along the bottom surface of tank 1 toward the side wall and partition plate material 13 has its momentum weakened by the multiple annular plate members 21. The center of the vortex formed (represented) by the dashed arrow is located approximately midway between the side wall and partition plate material 13 of tank 1 and the supply pipe 4, and is pulled downward by the downward-flowing fluid supplied from the supply pipe 4. At this time, small vortices are also generated between the multiple annular plate members 21, as shown by the thin arrows, and the more vortices generated, the weaker the momentum of the fluid flow can be. In addition, above tank 1 (towards the water surface), the fluid is drawn in by the downward-flowing fluid, causing it to flow downward. This reduces turbulence on the water surface. Note that Figure 4 shows vortices generated in a portion (one cross-section) of the annular plate member 21, but vortices are generated around the entire outer circumference of the annular plate member 21. Also, thick arrows indicate that the fluid velocity is faster and the momentum is stronger than that of the dashed and thin arrows, while thin arrows indicate that the fluid velocity is slower and the momentum is weaker than that of the thick and dashed arrows. In other words, a dashed arrow is slower and less powerful than a thick arrow, but faster and more powerful than a thin arrow.

[0036] The fluid flowing toward the partition plate 13 rises along the partition plate 13, its momentum weakens due to vortices, and then it flows into the second compartment 12. The fluid supplied to the first compartment 11 of tank 1 passes through the energy dissipation mechanism 2 and then flows into the downstream second compartment 12. In the absence of the energy dissipation mechanism 2, when the partition plate 13 weakens the flow momentum, a strong upward flow is generated, or a strong vortex is generated downstream of the partition plate 13 (X2 side), causing turbulence on the water surface of the second compartment 12 in Figure 4. However, because the momentum of the fluid flow in the first compartment 11 is weakened, the vortex downstream of the partition plate 13 is weak (there is little flow towards the upstream side), the ripple on the water surface of the fluid flowing into the second compartment 12 is small, and it flows horizontally downstream. Therefore, the impact when conducting tests or other operations in the second compartment 12 can be suppressed.

[0037] (Effects of the first embodiment) In the first embodiment, the following effects can be obtained.

[0038] In the first embodiment, as described above, the tank unit 100 is provided with a force dissipation mechanism 2 located inside the tank 1 and close to the side wall of the tank 1. The force dissipation mechanism 2 is positioned so as to overlap with a portion of the supply pipe 4 when viewed from above, and includes an annular plate member 21 and a plurality of support members 22 that support the annular plate member 21 when viewed from above. In the case of a conventional tank unit without a force dissipation mechanism, the fluid supplied to the tank from above flows downward and also flows upward along the side wall of the tank near the bottom. At this time, some of the fluid flows downward and some flows downstream, pulled by the strongly downward-flowing fluid being supplied. Also, a vortex is formed below the tank. However, if the force of the fluid flowing upward along the tank wall is strong, and the center of the vortex generated below is located close to the side wall of the tank, far from the supply pipe 4, and it is not possible to sufficiently draw in the fluid flowing upward, an upward flow will occur near the water surface, causing turbulence on the water surface. On the other hand, when a force dissipation mechanism 2 is provided as in the present invention, the fluid supplied to the force dissipation mechanism 2 from above flows downward inside the annular plate member 21 and upward along the side wall of the tank 1 outside the annular plate member 21. However, the annular plate member 21 acts as resistance to the flow, weakening the momentum of the upward-flowing fluid and causing a vortex to form below the tank 1. As a result, the center of the vortex, which was located near the side wall of the tank 1, moves towards the supply pipe, and the strong downward flow from the supply pipe 4 pulls more fluid downward, and the fluid being pulled downward increases in velocity (gains in momentum). At this time, a portion of the upward flow weakened by the annular plate member 21 is pulled by the strong downward flow and flows inward along the annular plate member 21, generating multiple small vortices along the annular plate member 21. Furthermore, the annular plate member 21 generates small vortices from a portion of the upward flow, which shifts the center of the vortex, previously located near the side wall of the tank 1, toward the supply pipe 4. This weakens the upward flow of the fluid while strengthening the downward flow of the fluid, causing the flow to shift downwards even near the water surface, thus reducing surface turbulence.Furthermore, the downward-flowing fluid flows outward along the upper surface of the annular plate member 21, creating resistance to the upward-flowing fluid along the side wall of the tank 1. This contributes to the generation of small vortices, thus weakening the force of the fluid flow. As a result, by weakening the force of the fluid supplied to the tank 1 from above, splashing of water from the tank 1 is suppressed, as is surface ripples, enabling accurate testing and measurement, and allowing for miniaturization.

[0039] In the first embodiment, as described above, the annular plate member 21 is formed in an annular or polygonal shape when viewed from above. With this configuration, by forming it in an annular or polygonal shape, the larger the total length of the sides of the annular plate member 21, the larger the vortex that can be generated along the sides, thereby further weakening the force of the fluid flow.

[0040] In the first embodiment, as described above, multiple annular plate members 21 are provided on the bottom surface of the tank 1, spaced apart from each other in the vertical direction. With this configuration, the annular plate members 21 act as resistance to the upward-flowing fluid, generating vortices between the bottom surface of the tank 1 and the annular plate members 21, and between the multiple annular plate members 21. As a result, more vortices are generated, and the force of the fluid flow can be weakened.

[0041] In the first embodiment, as described above, the tank 1 has a partition plate 13 that divides the inside of the tank 1 and has a height greater than or equal to the height from the bottom surface of the tank 1 to the lowest annular plate member 21, and the energy dissipation mechanism 2 is arranged in close proximity to the partition plate 13. As a result, the energy dissipation mechanism 2 can be placed in the area enclosed by the partition plate 13 and the wall of the tank 1, so that the partition plate 13 acts as resistance to the flow and weakens the force of the fluid flow. Furthermore, because the partition plate 13 has a height greater than or equal to the height from the bottom surface of the tank 1 to the lowest annular plate member 21, vortices are generated by the annular plate member 21 before the fluid is supplied to a height greater than the partition plate 13, further weakening the force of the fluid flowing into the tank 1.

[0042] In the first embodiment, as described above, the system further includes a measurement unit 3 which is placed in the tank 1 or the drainage pipe that drains from the tank 1 and acquires data related to the fluid. This allows the annular plate member 21 to weaken the force of the fluid flow and stabilize the water surface before the fluid reaches the measurement unit 3, thereby suppressing any impact on the measurement results in the measurement unit 3.

[0043] [Second Embodiment] Next, the configuration of the tank unit 100 according to the second embodiment of the present invention will be described with reference to Figures 1, 5, and 6. Unlike the first embodiment, in the second embodiment, the energy dissipation mechanism 202 includes a plurality of dispersion partition plates 24.

[0044] As shown in Figures 5 and 6, in the second embodiment, the energy dissipation mechanism 202 includes a dispersion partition plate 24 and a central member 25. The dispersion partition plate 24 and the central member 25 are provided on the lowest annular plate member 21 of the plurality of annular plate members 21. The dispersion partition plate 24 is configured to connect to a plurality of support members 22, for example. Furthermore, the dispersion partition plate 24 may also function as a support member. The dispersion partition plate 24 is arranged to extend along the vertical direction. The plurality of dispersion partition plates 24 are arranged at predetermined angular intervals along the outer circumferential surface of the central member 25. For example, eight dispersion partition plates 24 are provided, and the predetermined angular interval is 45 degrees, which is 360 degrees divided by 8. In short, the plurality of dispersion partition plates 24 extend radially from the central member 25 in a top view. For example, each of the plurality of dispersion partition plates 24 is positioned in the circumferential direction to correspond to a plurality of support members 22. The dispersion partition plate 24 is formed in a plate shape with the radial direction as the longitudinal direction, the vertical direction as the short direction, and the circumferential direction as the thickness direction.

[0045] The central member 25 is positioned at the center of the annular plate member 21. The central member 25 is columnar in shape. The central member 25 is provided with a through hole 26 that extends in the vertical direction.

[0046] In the second embodiment, the fluid supplied from above has its momentum weakened because the dispersion partition plate 24 and the central member 25 act as resistance. If, as viewed from above, fluid is not supplied from the supply pipe 4 to the through-hole 26 inside the central member 25, the resistance by the dispersion partition plate 24 can be increased. The fluid also flows dispersed in multiple directions along the dispersion partition plate 24. The fluid dispersed by the dispersion partition plate 24 then flows towards the annular plate member 21, generating multiple vortices. This further weakens the momentum of the flowing fluid.

[0047] The other configurations of the second embodiment are the same as those of the first embodiment described above.

[0048] (Effects of the second embodiment)

[0049] In the second embodiment, the same effects can be obtained from the same configuration as in the first embodiment, and the following effects can be obtained from a configuration different from that of the first embodiment.

[0050] In the second embodiment, as described above, the system further includes multiple dispersion partition plates 24 connected to multiple support members 22 and arranged to extend along the vertical direction. As a result, when the fluid flowing downward flows laterally (horizontally) along the bottom surface of the tank 1, the multiple dispersion partition plates 24 act as resistance, thereby weakening the force of the fluid flow. In addition, the multiple dispersion partition plates 24 allow the fluid to be dispersed and flow onto the annular plate member 21, generating multiple vortices and further weakening the force of the fluid flow.

[0051] In the second embodiment, as described above, a central member 25 is further provided, positioned at the center of the annular plate member 21. Multiple dispersion partition plates 24 are arranged at predetermined angular intervals along the outer circumferential surface of the central member 25. The central member 25 is columnar in shape and has through holes 26 extending in the vertical direction. This allows the fluid, whose flow force is weakened by the central member 25, to flow radially around the central member 25 when viewed from above. Furthermore, the dispersion partition plates 24 can force the fluid to flow at predetermined angular intervals, thereby effectively directing the fluid towards the annular plate member 21. Additionally, the central member 25 can be constructed using a cylindrical pipe or the like, thus simplifying its structure.

[0052] [Third Embodiment] Next, with reference to Figures 7 and 8, the configuration of the tank unit 100 according to the third embodiment of the present invention will be described. Unlike the first embodiment, in the third embodiment, the energy dissipation mechanism 302 includes a shielding member 27 and a lid member 28.

[0053] As shown in Figure 7, the shielding member 27 is configured to cover the sides between the multiple annular plate members 21. The shielding member 27 may be, for example, a plate-shaped member or a member having a mesh. Since the fluid supplied from above flows horizontally along the bottom surface, the shielding member 27 is preferably provided to cover the sides between the multiple annular plate members 21 located below. The shielding member 27 can reduce the gap between the multiple annular plate members 21, thereby weakening the flow force of the fluid flowing laterally and making it easier to generate vortices, thereby weakening the flow force of the fluid. When vortices are generated, the flow force of the fluid can be weakened. In addition, since an upward flow is formed along the shielding member 27, vortices can be generated in the part of the energy dissipation mechanism 302 that is not close to the side wall of the tank 1, thereby weakening the flow force of the fluid.

[0054] As shown in Figure 8, the lid member 28 is configured to cover a portion of the opening of the uppermost annular plate member 21. The lid member 28 increases the area of ​​the portion that resists the upward-flowing fluid, thereby generating a larger (stronger) vortex inside the energy dissipation mechanism 302 and weakening the force of the fluid flow. The lid member 28 is a plate-shaped member. For example, one lid member 28 may be provided, or multiple lid members may be provided. Also, the size of the lid member 28 may be larger than half the size of the opening of the annular plate member 21, or it may be less than or equal to half.

[0055] The other configurations of the third embodiment are the same as those of the first embodiment described above.

[0056] (Effects of the third embodiment)

[0057] In the third embodiment, the same effects can be obtained from the same configuration as in the second embodiment, and the following effects can be obtained from different configurations.

[0058] In the third embodiment, as described above, a shielding member 27 is further provided that covers the sides between the multiple annular plate members 21. This reduces the gap between the multiple annular plate members 21, increasing the resistance of the fluid flowing laterally, making it easier to generate vortices and easily weakening the force of the fluid flow. In addition, since an upward flow is formed along the shielding member 27, vortices can be generated even in the part of the energy dissipation mechanism 302 that is not close to the side wall of the tank 1, thereby weakening the force of the fluid flow.

[0059] In the third embodiment, as described above, the energy dissipation mechanism 302 further includes a cover member 28 that covers a portion of the opening of the annular plate member 21. By including the cover member 28, the area of ​​the portion that resists the upward-flowing fluid is increased, thereby generating a large (strong) vortex within the energy dissipation mechanism 302. As a result, the force of the flowing fluid can be effectively weakened.

[0060] (modified version) It should be noted that the embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims rather than by the description of the embodiments above, and further includes all modifications (exceptions) within the meaning and scope equivalent to the claims.

[0061] For example, the first to third embodiments described above show an example where the tank is rectangular in top view, but the present invention is not limited to this. The tank may have a polygonal or circular shape in top view.

[0062] Furthermore, although the first to third embodiments described above show examples in which the tank includes a partition plate, the present invention is not limited thereto. The tank may be an unpartitioned tank without a partition plate.

[0063] Furthermore, while the first to third embodiments described above show examples in which the tank is composed of a water tank with varying bottom heights, the present invention is not limited to this. In the present invention, the tank may be composed of a water tank with a uniform bottom height, or it may be composed of multiple tanks (water tanks) connected together.

[0064] Furthermore, although the first to third embodiments described above show examples in which the annular plate member is ring-shaped, the present invention is not limited thereto. In the present invention, as shown in Figure 9, the annular plate member 421 of the energy dissipation mechanism 402 may be polygonal in shape.

[0065] Furthermore, while the first to third embodiments described above show examples where the centers of multiple annular plate members coincide with the centers of the supply piping, the present invention is not limited to this. In the present invention, the centers of multiple annular plate members do not necessarily have to coincide with the centers of the supply piping.

[0066] Furthermore, although the first to third embodiments described above show an example in which one supply pipe is provided, the present invention is not limited thereto. In the present invention, multiple supply pipes may be provided.

[0067] Furthermore, although the first to third embodiments described above show an example in which three annular plate members are provided in the energy dissipation mechanism, the present invention is not limited thereto. In the present invention, there may be one, two, or four or more annular plate members.

[0068] Furthermore, while the first to third embodiments described above show examples in which the measuring unit is located in the tank, the present invention is not limited to this. In the present invention, the measuring unit may be located in the drainage piping that drains water from the tank.

[0069] Furthermore, while the first to third embodiments described above show an example in which the measuring unit measures the water level, the present invention is not limited to this. In the present invention, the measuring unit may be configured to measure the temperature, pH, etc., of the fluid, and may also be configured to have an observation window for observing underwater vortices, air intake vortices, etc.

[0070] Furthermore, while the first to third embodiments described above show examples in which the energy dissipation mechanism is used in a test apparatus, the present invention is not limited thereto. In the present invention, the energy dissipation mechanism may be used in apparatus other than a test apparatus, for example, in an observation apparatus for observing fluids. In this case, the configuration of the apparatus using the energy dissipation mechanism is not limited to Figure 1.

[0071] Furthermore, while the second embodiment described above shows an example where the distribution partition plate is the same height from the center to the outer periphery, the present invention is not limited to this. In the present invention, the distribution partition plate may vary in height from the center to the outer periphery.

[0072] Furthermore, although the second embodiment described above shows an example in which eight partition plates are provided for dispersion, the present invention is not limited to this. In the present invention, the number of partition plates provided for dispersion does not have to be eight.

[0073] Furthermore, although the second embodiment described above shows an example of connecting to multiple support members, the present invention is not limited thereto. In the present invention, the dispersion partition plate may be connected to an annular plate member.

[0074] Furthermore, while the second embodiment described above shows an example in which each of the multiple dispersion partitions is positioned in the circumferential direction to correspond to a plurality of support members, the present invention is not limited to this. In the present invention, each of the multiple dispersion partitions may be positioned between a plurality of support members in the circumferential direction.

[0075] Furthermore, although the third embodiment described above shows an example in which the energy dissipation mechanism includes a shielding member and a cover member, the present invention is not limited thereto. In the present invention, the energy dissipation mechanism may include only one of the shielding member or the cover member. [Explanation of Symbols]

[0076] 1 tank 2, 202, 302, 402 Force reduction mechanism 3. Measurement Unit 4. Supply piping 13 Partition boards 21 Annular plate member 22 Support member 24 Dispersion partition plates 25 Central Member 26 Through holes 27 Shielding member 28 Lid member 100 Tank Units

Claims

1. A tank through which fluid flows, A supply pipe that supplies fluid to the tank from above, The tank comprises a desaturating mechanism located inside the tank and positioned close to the side wall of the tank, The energy dissipation mechanism is arranged to overlap with a portion of the supply piping when viewed from above, and includes an annular plate member and a plurality of support members that support the annular plate member when viewed from above, as well as a tank unit.

2. The tank unit according to claim 1, wherein the annular plate member is formed in an annular or polygonal shape when viewed from above.

3. The tank unit according to claim 1, wherein a plurality of the annular plate members are provided on the bottom surface of the tank, spaced apart from each other in the vertical direction.

4. The tank unit according to claim 1, further comprising a plurality of distribution partition plates connected to the plurality of support members and arranged to extend along the vertical direction of the tank.

5. The annular plate member further comprises a central member positioned at the center of the annular plate member, The plurality of distribution partition plates are arranged along the outer circumferential surface of the central member at predetermined angular intervals. The central member is columnar, The tank unit according to claim 4, wherein the central member is provided with a through hole extending in the vertical direction.

6. The tank has a partition plate that divides the inside of the tank and has a height greater than or equal to the height from the bottom surface of the tank to the lowest annular plate member, The tank unit according to claim 1, wherein the energy dissipation mechanism is arranged in close proximity to the partition plate material.

7. The tank unit according to claim 1, further comprising a shielding member that covers the sides between a plurality of annular plate members.

8. The energy dissipation mechanism further comprises a lid member that covers a portion of the opening of the annular plate member, according to claim 1.

9. The tank unit according to claim 1, further comprising a measuring unit disposed in the tank or a drainage pipe for draining water from the tank, and for acquiring data relating to the fluid.

10. A pressure dissipation mechanism positioned close to the side wall of a tank to which fluid is supplied from above via a supply pipe, The energy dissipation mechanism is arranged to overlap a portion of the supply piping in a top view and includes an annular plate member that is annular in a top view, a plurality of support members that support the annular plate member spaced apart from the bottom surface of the tank, a plurality of dispersion partition plates connected to the support members and arranged to extend in a direction intersecting the vertical direction of the tank, and a central member positioned at the center of the annular plate member. Multiple annular plate members are provided on the bottom surface of the tank, spaced apart from each other in the vertical direction. The plurality of distribution partition plates are arranged along the outer circumferential surface of the central member at predetermined angular intervals. The central member is columnar, The aforementioned central member is provided with a through hole extending in the vertical direction, and is an energy dissipation mechanism.

Images