An energy dissipation water distribution method suitable for deep well storage tank

Abstract

The present application relates to water supply and drainage technical field, especially to a kind of energy dissipation water distribution method suitable for deep well regulating reservoir, and the energy dissipation water distribution method is realized including multi-stage flow distribution by setting multi-stage flow guide system and the multi-stage water distribution system suitable for it, wherein primary flow guide and primary water distribution generate certain depth water body pad at the bottom of deep well regulating reservoir, and the water body pad is a kind of non-structural energy dissipation way, for buffering energy dissipation to subsequent each stage water distribution.The present application has the advantages that: for deep well regulating reservoir, provide a kind of water distribution structure using drop type water pad energy dissipation way, the structure can not only assist initial water to form water body pad, but also provide uniform distribution function for later regulating water intake, to realize continuous, stable and effective regulation of deep well regulating reservoir.

Description

Technical Field

[0001] This invention relates to the field of water supply and drainage technology, and in particular to an energy dissipation and water distribution method suitable for deep well storage tanks. Background Technology

[0002] Rainwater storage tanks, as storage facilities for collecting rainwater runoff, can temporarily collect and store a certain amount of peak rainwater in the municipal drainage network system, and then discharge it at an appropriate time. This reduces runoff peaks, realizes rainwater recycling, and avoids water pollution caused by the direct discharge of initial rainwater runoff. Among them, large-capacity storage tanks, especially fully underground reinforced concrete shallow-buried storage tanks, have been widely implemented and used.

[0003] Currently, most fully underground stormwater storage tanks built both domestically and internationally are rectangular in structure. my country has issued a national standard atlas for fully underground rectangular reinforced concrete stormwater storage tanks with a soil cover of 2-3m. A small number of stormwater storage tanks abroad have adopted a circular structure, but their depth is generally no more than 20m and they occupy a large area, making them unsuitable for urban centers and old city areas with limited land use planning.

[0004] In response to the above situation, some large cities have begun research on deep-well stormwater storage tanks. Deep-well stormwater storage tanks are vertical shaft-type storage tanks constructed using vertical shield tunneling technology. They are characterized by small tank area, fast construction speed, small construction area, and deep burial depth, which will effectively alleviate the problem of tight land use planning in some areas. However, the depth of deep wells will exceed 20 meters, generally between 50-60 meters. The higher burial depth will increase the potential energy of the incoming water, which will severely scour the tank structure and bring about a series of instability problems. To eliminate these problems, energy dissipation facilities need to be added. These facilities include central vortex energy dissipation shafts, convection baffles, spiral stepped shafts, and spiral flow channels. Although these energy dissipation methods can achieve the energy dissipation goal to a certain extent, their construction and maintenance are complex, and they will significantly occupy the effective storage capacity of the stormwater storage tank, reducing the space utilization rate of the deep-well stormwater storage tank. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by providing an energy dissipation and water distribution method suitable for deep well storage tanks. This method uses a water cushion surface for energy dissipation instead of other previous energy dissipation methods, making fuller use of the tank space and saving land resources. At lower flow rates, a small stream of water falls to form a water cushion surface at the bottom of the tank, providing energy dissipation for the drop flow at higher flow rates, thus greatly reducing scouring. The water distribution method employs overflow weirs, orifice outflow, etc., ensuring uniform water distribution and achieving the purpose of energy dissipation and water distribution under small, medium, and large flow conditions.

[0006] The objective of this invention is achieved through the following technical solutions: A water dissipation and distribution method suitable for deep well storage tanks is characterized in that: the water dissipation and distribution method achieves multi-stage diversion and distribution by setting up a multi-stage diversion system and a matching multi-stage distribution system, wherein the first stage diversion and the first stage distribution generate a water surface of a certain depth at the bottom of the deep well storage tank. This water surface is a non-structural energy dissipation method used to buffer and dissipate energy for subsequent stages of water distribution.

[0007] The energy dissipation and water distribution method includes a total of three-stage diversion and three-stage water distribution. Each diversion system and each water distribution system is activated accordingly based on different inflow rates.

[0008] When the inflow is small and cannot reach the flow threshold of the primary diversion system, water is distributed only through the primary water distribution system. When the inflow is large, the flow rate exceeds the flow threshold of the primary flow diversion system. From the beginning of the inflow, the primary flow diversion system and the primary water distribution system are activated. The primary water distribution system generates a water surface of a certain depth at the bottom of the deep well storage tank. The combined flow threshold of the primary flow diversion system and the primary water distribution system activates the secondary flow diversion system and the secondary water distribution system, which then distribute water in coordination with the primary water distribution system. When the inflow is very large, the diversion flow exceeds the flow threshold of the secondary diversion system. The secondary diversion system is then converted into a tertiary diversion system, and the tertiary water distribution system is activated. Water is then distributed in coordination by the tertiary, secondary, and primary water distribution systems.

[0009] The primary water distribution system, by setting up a vortex channel, causes the distributed water to rotate along the inner wall of the deep well storage tank under the guidance of the flow and flow down the wall.

[0010] The advantages of this invention are: it provides a water distribution structure for deep well storage tanks using a drop-type water cushion surface energy dissipation method. This structure can not only assist in the formation of a water cushion surface during the initial water intake, but also provide a uniform distribution function for the subsequent water intake, so as to achieve continuous, stable and effective water storage in deep well storage tanks.

[0011] After implementation, firstly, this invention can replace other energy dissipation methods such as central vortex energy dissipation shafts, convection baffles, spiral stepped shafts, and spiral flow channels with water cushion surface energy dissipation. Furthermore, since there are no redundant energy dissipation structures, it achieves stable water distribution in stages and at multiple levels, and makes fuller use of the pool space, saving land resources. Secondly, utilizing structural features, a small stream of water falls to form a water cushion surface at the bottom of the pool at lower flow rates, providing energy dissipation for the cascade at higher flow rates, greatly reducing scouring. Finally, its water distribution method adopts overflow weirs, orifice outflow, etc., ensuring uniform water distribution. It can achieve the purpose of water distribution and energy dissipation under small, medium, and large flow conditions, and can adapt to certain expansions. It can be used simultaneously for engineering application promotion, experiments, and theoretical research, and features ingenious and flexible design, integrated water distribution and energy dissipation, simple and convenient energy dissipation structure, and stable and reliable water distribution process. Attached Figure Description

[0012] Figure 1 This is a planar schematic diagram of the present invention; Figure 2 for Figure 1 Sectional view along line AA; Figure 3 This is a schematic diagram of the swirl channel in this invention. Detailed Implementation

[0013] The features and other related features of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate understanding by those skilled in the art: like Figure 1-3 As shown, each of the markings represents: 1. Inlet pipe; 2. Grille; 3. Inlet ring channel; 4. Swirl channel; 5. Overflow weir; 6. Deluge hole; 7. Overflow ring channel; 8. Overflow hole; 9. Inner ring weir; 10. Deep well maintenance manhole; 11. Equipment layer maintenance manhole; 12. Water pump maintenance hole; 13. Jet ejector maintenance hole; 14. Water body surface; 15. Equipment area; 16. Deep well inner wall; 17. Swirl hole; 18. Swirl inclined plate; 19. Baffle wall.

[0014] Example: Figures 1 to 3 As shown, the energy dissipation water distributor applicable to deep well storage tanks in this embodiment consists of three parts: a ring-shaped flow guiding system, a rain shower water distribution system, and a surface auxiliary energy dissipation system.

[0015] This embodiment includes a three-stage annular flow guiding system and a three-stage rain shower water distribution system. It can preferably adopt the following structure, but is not limited to the following multi-stage flow guiding system and multi-stage water distribution system.

[0016] Specifically, the annular flow guiding system in this embodiment includes an inlet pipe 1, an inlet ring channel 3, an overflow weir 5, an overflow ring channel 7, and an inner ring weir 9. The inlet pipe 1 receives water from the deep well storage tank through its inlet hole and then guides it to the inlet ring channel 3. One side of the inlet ring channel 3 is adjacent to the inner wall 16 of the deep well storage tank. The overflow ring channel 7 is located inside the inlet ring channel 3. The overflow weir 5 is positioned between the inlet ring channel 3 and the overflow ring channel 7. The inner ring weir 9 is located on the inner side of the overflow ring channel 7, and no structure is provided between the inner ring weir 9 and the center of the tank. The inlet ring channel and the overflow ring channel are concentric annular structures to ensure uniform flow guiding.

[0017] The deluge distribution system includes a vortex channel 4, deluge holes 6, and overflow holes 8. The vortex channel 4 is located in the inlet ring channel 3, the deluge holes 6 are located in the overflow ring channel 7, and the overflow holes 8 are located on the inner ring weir 9. The deluge holes 6 are evenly distributed along the central ring line of the overflow ring channel 7. The overflow holes 8 are evenly distributed at a certain height on the inner ring weir 9.

[0018] The vortex channel 4 is evenly arranged along the outer side of the water inlet ring channel 3 and attached to the inner wall 16 of the deep well, so that the water distributed through the vortex channel 4 forms a water surface 14 of a certain depth at the bottom of the deep well storage tank.

[0019] In this embodiment, the swirl channel 4 is formed by the inner wall 16 of the deep well, the swirl holes 17, the swirl inclined plate 18 and the baffle wall 19. The swirl holes 17 are evenly opened on the plate of the water inlet ring channel 3. One side of the swirl inclined plate 18 is connected to the inner wall 16 of the deep well, and the other side is connected to the baffle wall 19. The upper part of the baffle wall 19 is connected to the water inlet ring channel 3.

[0020] An equipment area 15 is provided within an angle range of θ° on the inlet ring channel 3, providing space for the jet nozzle inspection port 13, the water pump inspection port 12, the equipment layer inspection manhole 11, and the deep well inspection manhole 10. Simultaneously, a grid 2 is installed within the equipment area 15, located after the inlet pipe 1, to serve as a filter.

[0021] After water is introduced from the inlet pipe, it first flows through the screen 2 to the inlet ring channel 3, where the vortex channel 4 performs initial distribution. Under the guidance of the vortex channel 4, the initial water flows down the inner wall 16 of the deep well, forming a water surface 14 of a certain depth at the bottom of the deep well. When the water intake exceeds the distribution capacity of the vortex channel 4, the water accumulation on the inlet ring channel 3 increases, gradually exceeding the overflow weir 5 and evenly entering the overflow ring channel 7. The deluge holes 6 evenly distributed on the overflow ring channel 7 redistribute the water, ensuring it flows evenly into the deep well and onto the previously formed water surface 14. When the water intake is very large, the water accumulation on the overflow ring channel 7 will flow into the deep well through the overflow holes 8 on the inner ring weir 9, at which point the deluge holes 6 and overflow holes 8 jointly distribute the water onto the water surface 14 in the deep well. The water surface can buffer and dissipate energy from the direct falling water, thus achieving stable water distribution in deep well storage tanks.

[0022] The annular flow guiding system has three levels of flow guiding, such as... Figure 1 As shown. In the diversion system, the primary diversion is introduced through the inlet pipe 1 and then guided to the vortex channel 4 via the inlet ring channel 3 for primary water distribution. When there is excessive water accumulation in the inlet ring channel 3, it is evenly diverted to the overflow ring channel 7 via the overflow weir 5 for secondary diversion, and the deluge holes 6 on the overflow ring channel 7 will perform secondary water distribution. As the water accumulation in the overflow ring channel 7 increases, the overflow ring channel 7 will perform tertiary diversion, and the water will be distributed in the form of orifice outflow through the overflow holes 8 on the inner ring weir 9. In this embodiment, the deluge water distribution system corresponds one-to-one with the ring diversion system, and a three-stage water distribution system exists.

[0023] like Figure 2As shown. The three-stage annular diversion system corresponds to a three-stage deluge water distribution system. The vortex channel 4 performs primary water distribution, forming a water surface 14 by diverting the water along the wall, thus providing a preset energy dissipation method for the secondary and tertiary water distribution systems. The deluge holes 6 perform secondary water distribution, evenly distributing the water diverted by the overflow loop 7 to meet normal water distribution needs. The overflow holes 8 perform tertiary water distribution to cope with sudden situations where the diverted water volume is large in a short period of time.

[0024] Combination Figure 1 and Figure 2 As shown, the surface-assisted energy dissipation system is a non-structural energy dissipation method generated by the annular diversion system and the deluge distribution system. The primary diversion and primary distribution will form a water surface 14 of a certain depth at the bottom of the deep well storage tank, and the water surface 14 will buffer and dissipate energy for the secondary and tertiary water distribution.

[0025] Depending on the influent flow rate, three operating conditions will exist during the implementation process: (1) Primary diversion + primary water distribution (start-up condition): When the inflow is small, the primary diversion threshold cannot be reached, and only primary water distribution is performed.

[0026] (2) Primary diversion + primary water distribution + secondary diversion + secondary water distribution (normal operating conditions): The inflow is large, and the diversion flow exceeds the primary diversion flow threshold. At the beginning of the inflow, the primary diversion and primary water distribution are activated, and the primary water distribution creates a water surface of a certain depth at the bottom of the deep well storage tank. When the inflow exceeds the combined flow threshold of the primary diversion and primary water distribution, the secondary diversion and secondary water distribution are activated.

[0027] (3) Primary diversion + primary water distribution + secondary diversion + secondary water distribution + tertiary diversion + tertiary water distribution (early warning condition): The inflow is very large. The combined diversion and distribution of water from the first and second stages exceeds the flow threshold of operating condition (2). The second stage diversion is converted into the third stage diversion and the third stage water distribution mode is activated to deal with the emergency.

[0028] In this embodiment, the vortex channel 4 is formed by the inner wall 16 of the deep well, vortex holes 17, vortex inclined plates 18, and baffle walls 19. The vortex holes 17 are evenly distributed on the inlet ring channel 3. One side of the vortex inclined plate 18 is connected to the inner wall 16 of the deep well, and the other side is connected to the baffle wall 19. The upper part of the baffle wall 19 is connected to the inlet ring channel 3, thereby realizing that the initial water distribution rotates and flows down the inner wall 16 of the deep well under the guiding effect of the vortex channel 4.

[0029] An equipment area 15 is set within an angle range of θ° on the water inlet ring channel 3, providing an area for the jet nozzle inspection hole 13, the water pump inspection hole 12, the equipment layer inspection manhole 11, and the deep well inspection manhole 10.

[0030] This embodiment provides a three-stage flow guiding system and a three-stage water distribution system. However, in some cases, the number of flow guiding systems and water distribution systems can be increased or decreased according to actual conditions. At the same time, the flow guiding and water distribution capabilities of each stage of the flow guiding system and each stage of the water distribution system can be further designed to adjust the performance of the energy dissipation water distributor. For example, adjusting the width of the inlet ring channel 3 and the overflow ring channel 7, and the angle of the swirl to 4, etc.; simultaneously, coordinating the flow guiding system with the water distribution system to achieve performance adjustment of the deep well storage tank.

[0031] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A method for energy dissipation and water distribution suitable for deep well regulating reservoirs, characterized in that: This energy dissipation water distribution method achieves multi-stage diversion and water distribution by setting up a multi-stage diversion system and a matching multi-stage water distribution system. The first-stage diversion and the first-stage water distribution generate a water surface of a certain depth at the bottom of the deep well storage tank. This water surface is a non-structural energy dissipation method used to buffer and dissipate energy for subsequent water distribution stages. The diversion system includes an inlet pipe, an inlet ring channel, an overflow weir, an overflow ring channel, and an inner ring weir. The inlet pipe receives the water from the deep well storage tank through its inlet hole and then guides it to the inlet ring channel. One side of the inlet ring channel is adjacent to the inner wall of the deep well of the deep well storage tank. The overflow ring channel is located inside the inlet ring channel. The overflow weir is set between the inlet ring channel and the overflow ring channel. The inner ring weir is set inside the overflow ring channel. No structure is set from the inner ring weir to the center of the tank. The inlet ring channel and the overflow ring channel are concentric ring structures. The water distribution system includes a vortex channel, deluge holes, and overflow holes. The vortex channel is arranged in the inlet ring channel, the deluge holes are arranged in the overflow ring channel, and the overflow holes are arranged on the inner ring weir. The deluge holes are evenly arranged along the central ring line of the overflow ring channel, and the overflow holes are evenly arranged at a certain height on the inner ring weir. The first-stage diversion in the diversion system involves introducing water through the inlet pipe and guiding it to the vortex channel for primary water distribution. When there is excessive water accumulation in the inlet ring channel, secondary diversion begins, with water flowing evenly through the overflow weir to the overflow ring channel. The deluge holes on the overflow ring channel will then perform secondary water distribution. As the water accumulation in the overflow ring channel increases, tertiary diversion will occur, with water flowing out through the overflow holes on the inner ring weir in the form of orifice outflow.

2. The energy dissipation and water distribution method applicable to deep well regulating reservoirs according to claim 1, characterized in that: When the inflow is small and cannot reach the flow threshold of the primary diversion system, water is distributed only through the primary water distribution system. When the inflow is large, the flow rate exceeds the flow threshold of the primary flow diversion system. From the beginning of the inflow, the primary flow diversion system and the primary water distribution system are activated. The primary water distribution system generates a water surface of a certain depth at the bottom of the deep well storage tank. When the combined flow threshold of the primary flow diversion system and the primary water distribution system is exceeded, the secondary flow diversion system and the secondary water distribution system are activated, and the secondary water distribution system works in conjunction with the primary water distribution system to distribute water. When the inflow is very large, the diversion flow exceeds the flow threshold of the secondary diversion system. The secondary diversion system is then converted into a tertiary diversion system, and the tertiary water distribution system is activated. Water is then distributed in coordination by the tertiary, secondary, and primary water distribution systems.

3. The energy dissipation and water distribution method applicable to deep well regulating reservoirs according to claim 1, characterized in that: The primary water distribution system uses a vortex channel to guide the water to rotate along the inner wall of the deep well storage tank and flow down the wall.

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