dissipation tank

Abstract

The application provides an energy dissipation water tank, which comprises a tank body, a water inlet pipe, a first energy dissipation device and a water outlet pipe. The water outlet of the water inlet pipe is located in the water storage cavity, and the distance from the water outlet of the water inlet pipe to the bottom wall of the water storage cavity is less than a preset value. The first energy dissipation device is arranged at the water outlet of the water inlet pipe. The water inlet of the water outlet pipe is located in the water storage cavity. The first energy dissipation device arranged in the water inlet pipe of the tank body can dissipate the water flowing into the tank body, avoid the flashing phenomenon of the water flowing into the pipe, ensure the continuous flow capacity of the pipe, and reasonably utilize the internal space of the tank body. The water outlet of the water inlet pipe and the water inlet of the water outlet pipe are located at the two ends of the length direction of the tank body and deviate from each other, which is equivalent to increasing the length of the flow channel in the tank body, and can avoid the vortex at the water outlet of the water outlet pipe.

Description

Technical Field

[0001] This application relates to the field of fire water tank technology, and more particularly to an energy dissipation water tank. Background Technology

[0002] Condensate produced by steam in equipment pipelines due to pressure and temperature drops is called condensate. To ensure the service life of equipment pipelines, condensate should be discharged in a timely manner. In the steam equipment of power plants, because the condensate is pressurized and heated, flash evaporation is likely to occur when the condensate is discharged into the water tank through the pipeline. This reduces the flow capacity of the upstream pipeline. In addition, the water tanks used in power plants are limited by space and have a small volume. The outlet and inlet of the water tank are close to each other, and vortices are likely to form at the outlet of the water tank, which can cause air to be drawn into the pump and damage the pump body. Summary of the Invention

[0003] This application aims to at least partially address one of the technical problems in the related art.

[0004] Therefore, the purpose of this application is to propose an energy-dissipating water tank. By installing a first energy-dissipating device in the water inlet pipe of the tank, the energy of the condensate entering the tank is dissipated, avoiding the flash evaporation phenomenon caused by the condensate entering the pipe, ensuring the continuous flow capacity of the pipe, and by making reasonable use of the internal space of the water tank, the outlet of the water inlet pipe and the inlet of the water outlet pipe are opposite to each other and located at both ends of the length of the tank, which is equivalent to increasing the length of the flow channel inside the tank and preventing vortices from forming at the outlet of the water outlet pipe.

[0005] To achieve the above objectives, this application proposes an energy-dissipating water tank, comprising: a tank body having a water storage cavity; an inlet pipe having an outlet located within the water storage cavity, the distance from the outlet of the inlet pipe to the bottom wall of the water storage cavity being less than a preset value; a first energy-dissipating device disposed at the outlet of the inlet pipe; and an outlet pipe having an inlet located within the water storage cavity, the orientation of the inlet of the outlet pipe being opposite to the orientation of the outlet of the inlet pipe, and the outlet of the inlet pipe and the inlet of the outlet pipe being located at opposite ends of the length direction of the tank body.

[0006] Furthermore, the first energy dissipation device includes:

[0007] The first energy dissipation pipe has a first port and a second port opposite to each other in its extension direction. The first port is connected to the outlet of the water inlet pipe. The lower part of the first energy dissipation pipe is provided with a plurality of first energy dissipation drainage holes. The total area of ​​the plurality of first energy dissipation drainage holes is greater than the cross-sectional area of ​​the first energy dissipation pipe.

[0008] A first blocking plate is disposed at the second port and covers the second port.

[0009] Furthermore, the first energy dissipation pipe is arranged parallel to the bottom wall of the box, and the area where the first energy dissipation drainage hole is located is at least the area below the horizontal diameter of the first energy dissipation pipe.

[0010] Furthermore, the plurality of first energy dissipation drainage holes are evenly spaced along the circumference of the first energy dissipation pipe, and the total area of ​​the plurality of first energy dissipation drainage holes is at least a multiple of the cross-sectional area of ​​the first energy dissipation pipe.

[0011] Furthermore, it also includes a flow guiding device, which is fixedly installed at the inlet of the water outlet pipe. The flow guiding device includes: a cover plate and multiple baffles. The multiple baffles are respectively vertically installed on the side of the cover plate and intersect at the center line of the cover plate. The ends of the multiple baffles away from the cover plate are fixedly connected to the inner peripheral wall of the water outlet pipe. The multiple baffles divide the inlet of the water outlet pipe into multiple water inlet channels.

[0012] Furthermore, it also includes:

[0013] A recirculation pipe, wherein the outlet of the recirculation pipe is located within the water storage chamber; and

[0014] A second energy dissipation device is disposed at the outlet of the recirculation pipe. The second energy dissipation device includes: a second energy dissipation pipe communicating with the outlet of the recirculation pipe; the second energy dissipation pipe having a third port and a fourth port opposite each other in its extending direction; wherein a second energy dissipation drain hole is provided at the lower part of the second energy dissipation pipe, and the total area of ​​the second energy dissipation drain hole is larger than the cross-sectional area of ​​the second energy dissipation pipe; and

[0015] A second blocking plate and a third blocking plate, wherein the second blocking plate is disposed at the third port and covers the third port, and the third blocking plate is disposed at the fourth port and covers the fourth port.

[0016] Furthermore, the area where the second energy dissipation drain hole is located is at least within the area below the horizontal diameter of the second energy dissipation pipe, and multiple second energy dissipation drain holes are arranged away from the inlet direction of the outlet pipe.

[0017] Furthermore, the outlet of the inlet pipe is higher than the inlet of the outlet pipe, and the outlet of the inlet pipe and the inlet of the outlet pipe are spaced apart in the horizontal radial direction of the tank.

[0018] Furthermore, the recirculation pipe is vertically disposed within the housing, and the extension direction of the second energy dissipation pipe is perpendicular to the extension direction of the recirculation pipe.

[0019] Furthermore, a first rib is provided between the water inlet pipe and the bottom wall of the tank, a second rib is provided between the water outlet pipe and the bottom wall of the tank, a third rib is provided between the second blocking plate and the inner wall of the tank, and a fourth rib is provided between the third blocking plate and the inner wall of the tank.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0022] Figure 1 This is a schematic diagram of the structure of an energy dissipation water tank according to an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the structure of the first energy dissipation pipe of the energy dissipation tank according to another embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the structure of the second energy dissipation pipe of the energy dissipation tank according to another embodiment of this application. Figure 1 ;

[0025] Figure 4 This is a schematic diagram of the structure of the second energy dissipation pipe of the energy dissipation tank according to another embodiment of this application. Figure 2 ;

[0026] Figure 5 This is a schematic diagram of the flow guiding device for an energy dissipation water tank according to another embodiment of this application. Figure 1 ;

[0027] Figure 6 This is a schematic diagram of the structure of the first energy dissipation pipe of the energy dissipation tank according to another embodiment of this application. Figure 2 . Detailed Implementation

[0028] The embodiments of this application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. Rather, the embodiments of this application include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0029] Figure 1 This is a schematic diagram of the structure of an energy dissipation water tank according to an embodiment of this application.

[0030] In the existing technology, water tanks are used in power plants. Due to space constraints, horizontal water tanks are often used, and the water tank volume is relatively small. The water tank outlet often needs to be adjusted due to layout requirements. The water tank has an overflow port because it is controlled by the liquid level. The water tank will not operate in a full state. The height difference between the normal liquid level of the water tank and the pump inlet is small.

[0031] See Figures 1-6 An energy dissipation water tank 100 includes a tank body 1, an inlet pipe 2, a first energy dissipation device 3, and an outlet pipe 4.

[0032] The housing 1 has a water storage chamber 200;

[0033] The outlet of the water inlet pipe 2 is located inside the water storage chamber, and the distance from the outlet of the water inlet pipe 2 to the bottom wall of the tank 1 is less than a preset value. In this embodiment, the preset value is related to the liquid level in the tank, and the outlet of the water inlet pipe 2 should be submerged in the condensate.

[0034] The first energy dissipation device 3 is located at the outlet of the water inlet pipe 2;

[0035] The inlet of the water outlet pipe 4 is located inside the water storage chamber. The orientation of the inlet of the water outlet pipe 4 is opposite to that of the outlet of the water inlet pipe 2. The outlet of the water inlet pipe 2 and the inlet of the water outlet pipe 4 are located at opposite ends of the length of the box body 1.

[0036] The energy-dissipating water tank of this application dissipates energy from the condensate entering the tank by installing a first energy-dissipating device inside the inlet pipe, thus preventing flash evaporation and ensuring continuous flow capacity. Furthermore, by rationally utilizing the internal space of the tank, the outlet of the inlet pipe and the inlet of the outlet pipe are positioned opposite each other and at opposite ends of the tank's length, effectively increasing the flow channel length within the tank and preventing vortices from forming at the outlet pipe's outlet. Through optimized design of the structure and arrangement of the inlet and outlet pipes, this application maximizes the distance between the outlet and outlet pipes within the limited tank volume, avoiding mutual interference between the inlet and outlet water and reducing the likelihood of vortices forming at the outlet pipe's inlet.

[0037] Understandably, the inlet pipe 2 has an inlet and the outlet pipe 4 has an outlet. Drainage enters from the inlet of the inlet pipe, flows through the first energy dissipation device and then flows into the tank. Drainage in the tank 1 enters the pipe through the outlet pipe from the inlet of the outlet pipe and flows out from the outlet of the outlet pipe.

[0038] Specifically, the box 1 has an internal hollow structure, and the internal hollow part of the box 1 is a water storage cavity. In this embodiment, the box 1 has a circular cylindrical structure. In other embodiments, the box 1 can also be other shapes, such as a cuboid structure, a cube structure, etc. This application does not limit this.

[0039] Regarding the arrangement of the water inlet pipe 2 inside the tank, preferably, the outlet of the water inlet pipe should be submerged in the condensate and close to the bottom wall of the tank, so as to minimize the disturbance to the condensate inside the tank during the water discharge process.

[0040] Regarding the installation of the first energy dissipation device 3, during the process of condensate flowing into the tank from the outlet of the inlet pipe 2, the first energy dissipation device 3 reduces the pressure of the condensate to dissipate energy, preventing the pressurized condensate from entering the tank and causing flash evaporation due to pressure changes, and the depressurized condensate flows into the tank 1 more smoothly.

[0041] The first energy dissipation device 3 includes: a first energy dissipation pipe 31, the first energy dissipation pipe 31 having a first port and a second port opposite to each other in its extension direction, the first port 310 being connected to the outlet of the water inlet pipe 2, and a plurality of first energy dissipation drainage holes 33 being provided at the lower part of the first energy dissipation pipe 31, the total area of ​​the plurality of first energy dissipation drainage holes 33 being greater than the cross-sectional area of ​​the first energy dissipation pipe 31.

[0042] The first blocking plate 32 is located at the second port 320 and covers the second port 320.

[0043] In this embodiment, the first energy dissipation pipe 31 is an independently set pipe section. The first end of the first energy dissipation pipe 31 is connected to the outlet of the water inlet pipe 2. The second end of the first energy dissipation pipe 31 is a free end. The port of the second end is sealed with a first blocking plate, so that the condensate entering the first energy dissipation pipe can only flow out through the first energy dissipation drain hole. After the water flow is sprayed out along the first energy dissipation drain hole, it violently turbulent in a local small range and consumes a lot of energy at the outlet of the first energy dissipation drain hole. Therefore, the first energy dissipation pipe consumes and disperses the energy of the water flow by setting the first energy dissipation drain hole along the way, and can completely and fully depressurize and dissipate the energy of the condensate entering the tank.

[0044] Preferably, the sum of the areas of the first energy-dissipating drainage holes 33 provided on the outer peripheral wall of the first energy-dissipating pipe 31 near the bottom wall of the housing 1 is greater than the cross-sectional area of ​​the first energy-dissipating pipe 31, thereby achieving a better energy dissipation effect. Specifically, the size of the openings of the first energy-dissipating drainage holes 33 and their arrangement are not limited in this embodiment, as long as their total area is greater than the cross-sectional area of ​​the first energy-dissipating pipe. Multiple first energy-dissipating drainage holes 33 are evenly spaced along the circumference of the first energy-dissipating pipe 31, and the total area of ​​the multiple first energy-dissipating drainage holes 33 is at least 1.2 times the cross-sectional area of ​​the first energy-dissipating pipe 31. In this embodiment, the multiple first energy-dissipating drainage holes 33 are evenly arranged on the outer peripheral wall of the first energy-dissipating pipe 31, so that the hydrophobic water in the inlet pipe 2 is evenly distributed within the housing, further improving the stability of the hydrophobic water entering the housing. Preferably, the total area of ​​the multiple first energy-dissipating drainage holes 33 is at least 1.2 times the cross-sectional area of ​​the first energy-dissipating pipe 31, thereby giving the first energy-dissipating pipe a better energy dissipation effect.

[0045] In other embodiments, the first energy dissipation pipe 31 may also be integrally formed with the water inlet pipe. This application does not limit this, as long as it can dissipate energy for hydrophobic water.

[0046] The first energy dissipation pipe 31 is arranged parallel to the bottom wall of the housing 1, and the area where the first energy dissipation drain hole 33 is located is at least the area below the horizontal diameter of the first energy dissipation pipe 31.

[0047] The first energy dissipation pipe 31 is set parallel to the bottom wall of the tank 1, which can ensure that the pressure of each part of the first energy dissipation pipe is balanced in the condensate. After the energy is dissipated by the condensate, it can be smoothly dispersed from each part of the first energy dissipation pipe into the tank. The arrangement of the first energy dissipation drain hole area makes the condensate flowing through the first energy dissipation pipe spray towards the bottom wall of the tank, avoiding the water flow from the first energy dissipation drain hole from causing fluctuations in the liquid surface in the tank and bringing air into the outlet pipe, which would cause pump cavitation.

[0048] In other embodiments, if the total flow area of ​​the first energy dissipation drain hole 33 located at the lower part of the first energy dissipation pipe does not meet the requirements, a small number of holes can be added to the upper part of the first energy dissipation pipe according to the actual situation to avoid the water flow from the first energy dissipation drain hole affecting the stability of the liquid surface.

[0049] The energy dissipation water tank also includes a flow guiding device 5, which is fixedly installed at the inlet of the outlet pipe 4. The flow guiding device 5 includes a cover plate 51 and multiple baffles 52. The multiple baffles 52 are respectively vertically installed on the end face of the cover plate 51, and the multiple baffles 52 intersect at the center line of the cover plate 51. The end of the multiple baffles 52 away from the cover plate 51 is fixedly connected to the inner peripheral wall of the outlet pipe 4. The multiple baffles 52 divide the inlet of the outlet pipe 4 into multiple inlet channels.

[0050] Specifically, the other end of the baffle 52 can be welded to the side of the cover plate 51 to enhance the stability between the baffles 52. One end of the baffle can be welded or snapped into the inner circumferential wall of the water outlet pipe so that each baffle is stably installed at the water inlet of the water outlet pipe.

[0051] In this embodiment, a flow guiding device is arranged at the inlet of the outlet pipe 4. By guiding the water dredging at the inlet of the outlet pipe 4, the generation of vortices at the outlet pipe is further avoided, preventing air from being drawn into the pump and preventing fluid vaporization. The specific structure of the flow guiding device consists of multiple baffles intersecting at a straight line, which coincides with the center line of the cover plate. Specifically, the four baffles divide the cover plate into eight equal regions (i.e., the angle between adjacent baffles is 45°), and each region forms a water flow channel. The direction of water flow is from the water flow channel between the baffles into the outlet pipe. The equal division into eight water flow channels ensures the uniformity of the fluid. At the same time, the fluid passing through eight water flow channels avoids the formation of vortices that could cause cavitation in the pump, ensuring the reliable operation of the pump.

[0052] The energy dissipation tank also includes: a recirculation pipe 6, the outlet of which is located within the water storage chamber; and a second energy dissipation device 7, located at the outlet of the recirculation pipe 6. The second energy dissipation device 7 includes: a second energy dissipation pipe 71, which is connected to the outlet of the recirculation pipe 6. The second energy dissipation pipe 71 has a third port and a fourth port opposite to each other in its extension direction. A second energy dissipation drain hole 73 is provided at the lower part of the second energy dissipation pipe 71, the total area of ​​which is larger than the cross-sectional area of ​​the second energy dissipation pipe 71; and a second blocking plate 72 and a third blocking plate 74. The second blocking plate 72 is located at the third port and covers the third port, and the third blocking plate 74 is located at the fourth port and covers the fourth port. The area where the second energy dissipation drain hole 73 is located is at least below the horizontal diameter of the second energy dissipation pipe 71, and multiple second energy dissipation drain holes 73 are arranged away from the inlet direction of the outlet pipe 4.

[0053] In this embodiment, since the condensate in the recirculation pipe 6 will also flow back into the tank 1, a second energy dissipation device is set at the outlet of the recirculation pipe 6 to dissipate the energy of the condensate flowing back from the recirculation pipe 6, so as to prevent the condensate flowing out of the recirculation pipe from causing fluctuations in the liquid level of the tank. Given that the circulating water flow rate is small, the diameter of the recirculation pipe 6 is smaller than that of the inlet pipe, and the recirculation pipe is arranged on the left side of the inlet pipe to avoid interference with the inlet pipe. Due to the limited volume of the tank, to improve the energy dissipation capacity of the second energy dissipation device, the extension direction of the second energy dissipation pipe is perpendicular to the extension direction of the recirculation pipe. The second energy dissipation pipe can have a larger fluid throughput. Furthermore, to avoid disturbing the inlet of the outlet pipe and the liquid surface in the tank, a second energy dissipation drain hole is provided in the lower part of the second energy dissipation pipe, away from the outlet of the outlet pipe. Specifically, the opening direction of the second energy dissipation drain hole is away from the inlet of the outlet pipe to avoid the violent turbulence in a small local area when water is sprayed out along the second energy dissipation drain hole, which would affect the inlet of the outlet pipe. Specifically, the second energy dissipation drain holes are set at an angle of 20° between adjacent second energy dissipation drain pipes in the circumferential direction of the second energy dissipation pipe, so that the drainage from the second energy dissipation pipe does not affect the liquid surface in the tank.

[0054] The outlet of inlet pipe 2 is higher than the inlet of outlet pipe 4, and the outlets of inlet pipe 2 and outlet pipe 4 are spaced apart in the horizontal radial direction of the tank body 1. By arranging the positions of the inlet and outlet pipes, the mutual interference between the inlet and outlet pipes is further avoided, ensuring that the fluid flows smoothly within the tank body.

[0055] A first rib 10 is provided between the water inlet pipe 2 and the bottom wall of the tank 1, a second rib 11 is provided between the water outlet pipe 4 and the bottom wall of the tank 1, a third rib 8 is provided between the second blocking plate 71 and the inner wall of the tank 1, and a fourth rib 9 is provided between the third blocking plate 74 and the inner wall of the tank 1.

[0056] In this embodiment, the stability of the inlet pipe, outlet pipe, and second energy dissipation pipe is increased by setting rib support.

[0057] In practical applications, the water supply to the tank is steam condensate, the system design pressure is 1.15 MPa, the design temperature is 70℃, the design flow rate is 137 t / h, the downstream pump head is 170 m, and the recirculation pipe flow rate is 50 t / h. The effective volume of the water tank is 2 m³. 3 The layout is compact, with a water tank diameter of 1.2m and a length of 2m (excluding the end cap).

[0058] Inside the water tank, the outlets of the inlet pipe and the recirculation pipe are positioned as far away from the outlet of the outlet pipe as possible, maximizing the flow path within the tank. In this practical application, the total flow area of ​​the first energy-dissipating drain hole is 1.6 times the flow area of ​​the first energy-dissipating pipe, and the total flow area of ​​the second energy-dissipating drain hole in the recirculation pipe is 2.35 times the flow area of ​​the second energy-dissipating pipe. By adding the energy-dissipating device, cavitation disappears, and the pump flow rate and water tank level operate at their design values.

[0059] It should be noted that in the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0060] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An energy-dissipating water tank, characterized in that, include: The box (1) has a water storage cavity; Water inlet pipe (2), the outlet of the water inlet pipe (2) is located in the water storage cavity, and the distance from the outlet of the water inlet pipe (2) to the bottom wall of the water storage cavity is less than a preset value, so that the outlet of the water inlet pipe (2) is submerged in the condensate. The first energy dissipation device (3) is located at the outlet of the water inlet pipe (2); the first energy dissipation device (3) includes a first energy dissipation pipe (31) and a first blocking plate (32). The first energy dissipation pipe (31) has a first port and a second port opposite to each other in its extension direction. The first port is connected to the outlet of the water inlet pipe (2). The lower part of the first energy dissipation pipe (31) is provided with a plurality of first energy dissipation drainage holes (33). The total area of ​​the plurality of first energy dissipation drainage holes (33) is greater than the cross-sectional area of ​​the first energy dissipation pipe (31). The first blocking plate (32) is located at the second port and covers the second port. Water outlet pipe (4), the inlet of the water outlet pipe (4) is located in the water storage cavity, the orientation of the inlet of the water outlet pipe (4) is opposite to the orientation of the outlet of the water inlet pipe (2), the outlet of the water inlet pipe (2) and the inlet of the water outlet pipe (4) are respectively located at both ends of the length direction of the box body (1); A flow guiding device (5) is fixedly installed at the inlet of the water outlet pipe (4). The flow guiding device (5) includes: a cover plate (51) and multiple baffles (52). The multiple baffles are respectively vertically installed on the side of the cover plate (51), and the multiple baffles (52) intersect at the center line of the cover plate (51). One end of the multiple baffles (52) away from the cover plate (51) is fixedly connected to the inner peripheral wall of the water outlet pipe (4). The multiple baffles (52) divide the inlet of the water outlet pipe (4) into multiple water inlet channels. A recirculation pipe (6) has its outlet located inside the water storage chamber; The second energy dissipation device (7) is located at the outlet of the recirculation pipe (6). The second energy dissipation device (7) includes: a second energy dissipation pipe (71) connected to the outlet of the recirculation pipe (6), the second energy dissipation pipe (71) having a third port and a fourth port opposite to each other in its extension direction, wherein a second energy dissipation drain hole (73) is provided at the lower part of the second energy dissipation pipe (71), the total area of ​​the second energy dissipation drain hole (73) is greater than the cross-sectional area of ​​the second energy dissipation pipe (71); the total flow area of ​​the plurality of first energy dissipation drain holes (33) is 1.6 times the flow area of ​​the first energy dissipation pipe (31), and the total flow area of ​​the second energy dissipation drain holes (73) is 2.35 times the flow area of ​​the second energy dissipation pipe (71); and The second blocking plate (72) and the third blocking plate (74) are provided at the third port and cover the third port, and the third blocking plate (74) is provided at the fourth port and covers the fourth port.

2. The energy dissipation water tank as described in claim 1, characterized in that, The first energy dissipation pipe (31) is arranged parallel to the bottom wall of the box (1), and the first energy dissipation drainage hole (33) is located in an area at least below the horizontal diameter of the first energy dissipation pipe (31).

3. The energy dissipation water tank as described in claim 2, characterized in that, The plurality of first energy dissipation drainage holes (33) are evenly spaced along the circumference of the first energy dissipation pipe (31), and the total area of ​​the plurality of first energy dissipation drainage holes (33) is at least 1.2 times the cross-sectional area of ​​the first energy dissipation pipe (31).

4. The energy dissipation water tank as described in claim 1, characterized in that, The area where the second energy dissipation drain hole (73) is located is at least the area below the horizontal diameter of the second energy dissipation pipe (71), and multiple second energy dissipation drain holes (73) are arranged away from the inlet direction of the outlet pipe (4).

5. The energy dissipation water tank as described in claim 1, characterized in that, The outlet of the inlet pipe (2) is higher than the inlet of the outlet pipe (4), and the outlet of the inlet pipe (2) and the inlet of the outlet pipe (4) are spaced apart in the horizontal radial direction of the box body (1).

6. The energy dissipation water tank as described in claim 1, characterized in that, The recirculation pipe (6) is vertically arranged inside the box (1), and the extension direction of the second energy dissipation pipe (71) is perpendicular to the extension direction of the recirculation pipe (6).

7. The energy dissipation water tank as described in claim 1, characterized in that, A first rib (10) is provided between the water inlet pipe (2) and the bottom wall of the tank (1), a second rib (11) is provided between the water outlet pipe (4) and the bottom wall of the tank (1), a third rib (8) is provided between the second blocking plate (72) and the inner wall of the tank (1), and a fourth rib (9) is provided between the third blocking plate (74) and the inner wall of the tank (1).

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