Energy dissipation trough for energy dissipation well and energy dissipation well

Abstract

The present invention relates to an energy dissipation trough for an energy dissipation well, which includes a first flip bucket and a second flip bucket. The first flip bucket includes a top surface and a first overflow surface that smoothly extends outward from the top surface, and the top surface is higher than the first overflow surface. The second flip bucket includes a top portion and a second overflow surface that extends toward the first flip bucket from the top portion, and the bottom of the second overflow surface is smoothly connected to the end of the extension of the first overflow surface. An energy dissipation bucket is provided at the lowest point of the first overflow surface, and the top is higher than the top surface. An energy dissipation well is also provided, which includes a wellbore and an energy dissipation trough, and the energy dissipation trough is arranged at the bottom inside the wellbore. Through the cooperation of multiple overflow surfaces provided in the present invention, the water flow can be guided to the energy dissipation bucket, where intense surface rolling is generated, and a large energy dissipation effect is obtained through the surge waves and bottom rolling after the energy dissipation bucket. By providing the flip buckets, the kinetic energy of the water flow can be utilized to pick the water flow into the air, where air entrainment and dispersion occur, and a part of the kinetic energy is lost.

Description

Technical Field

[0001] The present invention relates to the technical field of energy dissipation wells, and specifically provides an energy dissipation trough for an energy dissipation well and an energy dissipation well. Background Art

[0002] In today's society, the floors of buildings are getting higher and higher to meet the increasing demand of the growing population. However, due to the increasing height of the floors, the potential energy of water is greater, and when the water flows from the building roof to the outdoor energy dissipation well, the kinetic energy of the water flow is greater, and the scouring damage to the rainwater energy dissipation well is more serious. Summary of the Invention

[0003] The purpose of the present invention is to provide an energy dissipation trough for an energy dissipation well and an energy dissipation well, which can at least solve some defects in the prior art.

[0004] To achieve the above purpose, an embodiment of the present invention provides the following technical solution: An energy dissipation trough for an energy dissipation well includes a first flow deflecting weir and a second flow deflecting weir. The first flow deflecting weir includes a top surface and a first overflow surface that smoothly extends outward from the top surface, and the top surface is higher than the first overflow surface. The second flow deflecting weir includes a top portion and a second overflow surface that extends in the direction of the first flow deflecting weir from the top portion, and the bottom of the second overflow surface is smoothly connected to the end of the extension of the first overflow surface. An energy dissipation bucket is provided at the lowest point of the first overflow surface, and the top portion is higher than the top surface.

[0005] Further, there are multiple second flow deflecting weirs, and each of the second flow deflecting weirs encloses a ring shape, and the first flow deflecting weir is located in the middle of the ring formed by each of the second flow deflecting weirs.

[0006] Further, the top surface is circular, and along the circumferential direction of the top surface, the first overflow surface is a closed curved surface.

[0007] Further, the first overflow surface is a first arc surface, the second overflow surface is a second arc surface, the first arc surface and the second arc surface are smoothly connected, and the first arc surface is a concave surface, and the second arc surface is a convex surface.

[0008] Further, the deflection angle of the first overflow surface is between 15° and 35°, and the deflection angle is the angle between the tangent line of the first overflow surface corresponding to the position of the top surface and the horizontal direction.

[0009] Further, the second flow deflecting weir further includes a third overflow surface that extends in the direction away from the first flow deflecting weir from the top portion.

[0010] Further, the third overflow surface includes a third arc surface and a plane. The third arc surface extends downward from the top portion, and the plane extends downward and obliquely from the extended end of the third arc surface. The third arc surface and the second overflow surface are on the same circumferential surface.

[0011] Further, the relationship between the extension length of the third arc surface and the extension length of the second overflow surface satisfies the following formula:

[0012] y / H d = k(x / H d ) n

[0013] where y is the height difference between the extended end of the third arc surface and the top, H d is the height difference between the water head height of the inlet water and the top, both k and n are fixed coefficient values and are both related to the slope of the plane, and x is the horizontal distance between the top and the extended end of the second overflow surface.

[0014] Another technical solution provided by the embodiment of the present invention is: an energy dissipation well, including a wellbore, and further including the above-mentioned energy dissipation trough for the energy dissipation well, and the energy dissipation trough is arranged at the bottom inside the wellbore.

[0015] Further, it further includes an inlet branch pipe arranged at a high position of the wellbore, and the water outlet of the inlet branch pipe is located directly above the second overflow surface.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: through the cooperation of multiple overflow surfaces provided, the water flow can be guided to the energy dissipation bucket, and a fierce surface roll is generated at the energy dissipation bucket, and a larger energy dissipation effect is obtained through the surge wave and the bottom roll after the energy dissipation bucket; and through the provided flip bucket, the kinetic energy of the water flow can be utilized to flip the water flow into the air, where air entrainment and dispersion occur, and a part of the kinetic energy is lost; when multiple drainage branch pipes are connected from different directions, the high-speed water flows in different directions flow along the overflow surface, pass through the energy dissipation bucket and flow towards the flip bucket, and then are flipped into the air from different directions, collide to form a roll, and strong momentum exchange and shear action occur, canceling each other's kinetic energy and gradually reducing the flow velocity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a top view of an energy dissipation well provided by an embodiment of the present invention;

[0018] Figure 2 is a sectional view of an energy dissipation well provided by an embodiment of the present invention;

[0019] Figure 3 is a schematic diagram of the relationship of local structure parameters of an energy dissipation well provided by an embodiment of the present invention;

[0020] In the attached drawing reference numerals: 1 is the first flip flow weir; 10 is the top surface; 11 is the first overflow surface; 2 is the second flip flow weir; 20 is the top; 21 is the second overflow surface; 22 is the third overflow surface; 220 is the third arc surface; 221 is the plane; 3 is the energy dissipating bucket; 40 is the wellbore; 41 is the well cover; 42 is the cover seat; 43 is the ladder; 5 is the inlet branch pipe; 6 is the inlet main pipe; 7 is the outlet main pipe; a is the energy dissipating trough. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figure 1 and Figure 2 A kind of energy dissipating trough for an energy dissipating well provided by an embodiment of the present invention includes a first flip flow weir 1 and a second flip flow weir 2. The first flip flow weir 1 includes a top surface 10 and a first overflow surface 11 that smoothly extends outward from the top surface 10, and the top surface 10 is higher than the first overflow surface 11. The second flip flow weir 2 includes a top 20 and a second overflow surface 21 that extends in the direction of the first flip flow weir 1 from the top 20, and the bottom of the second overflow surface 21 is smoothly connected to the end of the extension of the first overflow surface 11. An energy dissipating bucket 3 is provided at the lowest point of the first overflow surface 11, and the top 20 is higher than the top surface 10. In this embodiment, through the cooperation of the multiple overflow surfaces provided, the water flow can be guided to the energy dissipating bucket 3, a fierce surface roll is generated at the energy dissipating bucket 3, and a larger energy dissipation effect is obtained through the surge and bottom roll after the energy dissipating bucket 3. And through the flip flow weir provided, the kinetic energy of the water flow can be utilized to pick the water flow into the air, causing air entrainment and dispersion, and losing a part of the kinetic energy. Specifically, as Figure 1 and Figure 2 shown, the overall shape of the energy dissipating trough is like a lotus flower platform. The middle convex part is the first flip flow weir 1, and then a first overflow surface 11 extends outward from the first flip flow weir 1. The first overflow surface 11 is preferably a curved surface. There is a second flip flow weir 2 near the first flip flow weir 1. Its position is higher than that of the first flip flow weir 1, and it also extends a second overflow surface 21 outward. Specifically, the second overflow surface 21 extends in the direction of the first flip flow weir 1 to be docked with the first overflow surface 11, so that the water flow can be converged to the energy dissipating bucket 3 at the lowest point of the first overflow surface 11, thereby completing the energy dissipation. In this embodiment, for the purpose of showing the distinction, the first and second, as well as the top 20 and the top surface 10, are defined, and these are all described as different features, but there are no other excessive limiting meanings.

[0023] For the solution of the present invention embodiment, please refer to Figure 1 and Figure 2 . There are multiple second flip flow weirs 2, and each of the second flip flow weirs 2 encloses a ring shape, and the first flip flow weir 1 is located in the middle of the ring formed by each of the second flip flow weirs 2. In this embodiment, the number of the second flip flow weirs 2 can be many, and its layout form is generally arranged around the first flip flow weir 1 in the middle. As shown in Figure 1 , there are four second flip flow weirs 2. In this way, a large number of overflow surfaces can be formed to receive water flow and send it to the energy dissipation bucket 3 to correspond to the situation of multiple inlet branch pipes 5 or inlet main pipes 6. Correspondingly, the multiple second flip flow weirs 2 can also flip the water flow from all directions into the air for energy dissipation.

[0024] To further optimize the above solution, please refer to Figure 1 and Figure 2 . The top surface 10 is circular, and along the circumferential direction of the top surface 10, the first overflow surface 11 is a closed curved surface. In this embodiment, the top surface 10 is defined as a circular surface, and along the circumferential direction, thus the first overflow surface 11 is a closed curved surface. No matter from which direction the water flow comes, the closed curved surface can guide the water flow to the energy dissipation bucket 3, or it can also be sent to the flip flow weir, which can achieve a better energy dissipation effect. Of course, the top surface 10 can also be square or other shapes, and the formed first overflow surface 11 can also play a guiding role. Maybe the effect is not as good as that of the curved surface, but these are all example solutions of this embodiment.

[0025] As an optimized solution of the present invention embodiment, please refer to Figure 1 , Figure 2 and Figure 3 . The first overflow surface 11 is a first circular arc surface, the second overflow surface 21 is a second circular arc surface, the first circular arc surface and the second circular arc surface are smoothly connected, and the first circular arc surface is a concave surface, and the second circular arc surface is a convex surface. In this embodiment, the first overflow surface 11 and the second overflow surface 21 are defined as circular arc surfaces, and one is concave and the other is convex. The centers of the two circular arc surfaces are located on different sides. The combined curved surface formed by the two can make the water flow rise and fall on the surface, and can also eliminate part of the kinetic energy. As shown in Figure 3 , the center of the first circular arc surface is O 2 , and the center of the second circular arc surface is O 1 . Preferably, the flip angle of the first overflow surface 11 is between 15° and 35°, and the flip angle is the included angle between the tangent line of the first overflow surface 11 corresponding to the position of the top surface 10 and the horizontal direction. The radius R 2 of the first overflow surface 11 = H d , the radius R 1 of the second overflow surface 21 = 0.46H d , where Hd is the height difference between the water head height of the inlet water and the top 20. Preferably, when the filling degree of the inlet main pipe 6 is about 0.94, the maximum value of the flow rate ratio is about 1.08; when the filling degree of the inlet main pipe 6 is about 0.81, the maximum value of the flow velocity ratio is about 1.14; when the filling degree of the inlet main pipe 6 is 0.8, the maximum value of the flow rate ratio is about 1; when the filling degree of the inlet main pipe 6 is 0.5, the flow velocity is equal to the flow velocity at full pipe flow. Combining the filling degree value of the inlet main pipe 6 in practical applications and considering reducing the impact on the flow capacity, it can be deduced that the position of the top 20 is between D / 4 and D / 3, where D is the diameter of the inlet main pipe 6.

[0026] As an optimized solution of the embodiment of the present invention, please refer to Figure 2 and Figure 3 , the second flow splitter 2 further includes a third overflow surface 22 extending from the top 20 in a direction away from the first flow splitter 1. In this embodiment, there is also an overflow surface on the side of the second flow splitter 2 close to the wellbore 40. For the purpose of differential description, it is defined as the third overflow surface 22. This overflow surface receives the water flow from the inlet main pipe 6 and then sends it to the top 20 to be lifted, so it is also a downward-extending surface. Specifically, the third overflow surface 22 includes a third arc surface 220 and a plane 221. The third arc surface 220 extends downward from the top 20, and the plane 221 extends downward and obliquely from the extended end of the third arc surface 220. The third arc surface 220 and the second overflow surface 21 are on the same circumferential surface. The third overflow surface 22 includes a section of the third arc surface 220 and a section of the plane 221. Preferably, the relationship between the extended length of the third arc surface 220 and the extended length of the second overflow surface 21 satisfies the following formula:

[0027] y / H d =k(x / H d ) n

[0028] where y is the height difference between the extended end of the third arc surface 220 and the top 20, H d is the height difference between the water head height of the inlet water and the top 20, k and n are both fixed coefficient values and are both related to the slope of the plane 221, and x is the horizontal distance between the top 20 and the extended end of the second overflow surface 21.

[0029] For the convenience of refining the description of the above relationship, we define the plane 221 as the AB section, the third arc surface 220 as the BO section, the second arc surface as the OC section, the first arc surface as the CD section, and the CD section is connected to the top surface 10. Among them, the arc section BO section and the arc section OC section can be represented by the above formula. The OB section and the OC section are co-circular, and the diameter R of the arc section BO1 = 0.46H d The coefficient k and the exponent n depend on the slope of the AB section. To reduce the impact of this energy dissipation trough on the flow capacity, the AB section should be as gentle as possible, preferably the above-mentioned plane 221, and be tangent to the arc section BO. When the determined slope is 1:1, at this time k = 1.873 and n = 1.776. The arc section CD is smoothly connected to the OC section. When the water flow moves in the arc section CD, the centrifugal force generated will increase the pressure inside the CD section. Therefore, the radius R of the CD section 2 The smaller it is, the greater the centrifugal force, the pressure energy of the water flow in the flip bucket increases, the kinetic energy decreases, and the range also decreases. To ensure good flip flow conditions, R 2 = H d . Within the range of the flip angle, considering the particle projection motion, the larger the flip angle, the larger the entry angle into the water, the underwater range decreases, but the scouring is more severe. A smaller flip angle is not conducive to obtaining better energy dissipation effect in the energy dissipation bucket 3.

[0030] An embodiment of the present invention provides an energy dissipation well, which includes a wellbore 40 and the above-mentioned energy dissipation trough for the energy dissipation well, and the energy dissipation trough is arranged at the bottom inside the wellbore 40. In this embodiment, the above-mentioned energy dissipation trough is used in the energy dissipation well. Through the cooperation of multiple overflow surfaces arranged, the water flow can be guided to the energy dissipation bucket 3, a fierce surface roll is generated at the energy dissipation bucket 3, and a larger energy dissipation effect is obtained through the surge and bottom roll after the energy dissipation bucket 3. And the flip flow weir arranged can utilize the kinetic energy of the water flow, flip the water flow into the air, cause air entrainment and dispersion, and lose a part of the kinetic energy. Specifically, as Figure 1 and Figure 2 shown, the energy dissipation trough is integrally in the shape of a lotus platform, with a middle convex part being the first flip flow weir 1, and then a first overflow surface 11 extending outwards from the first flip flow weir 1. The first overflow surface 11 is preferably a curved surface, and there is a second flip flow weir 2 near the first flip flow weir 1. Its position is higher than that of the first flip flow weir 1, and it also extends out a second overflow surface 21. Specifically, the second overflow surface 21 extends towards the direction of the first flip flow weir 1 to be butted with the first overflow surface 11, so that the water flow can be converged to the energy dissipation bucket 3 at the lowest part of the first overflow surface 11, and then the energy dissipation is completed.

[0031] As an optimized solution of the embodiment of the present invention, please refer to Figure 1 and Figure 3 , this energy dissipation well further includes an inlet branch pipe 5 arranged at a high position of the wellbore 40, and the water outlet of the inlet branch pipe 5 is located directly above the second overflow surface 21. In this embodiment, arranging the water outlet of the inlet branch pipe 5 above the second overflow surface 21 can directly utilize the second overflow surface 21 for energy dissipation, then guide the water flow to the energy dissipation bucket 3, and then to the first flip flow weir 1, which can achieve the most direct and best energy dissipation effect.

[0032] As an optimized solution of the embodiment of the present invention, please refer to Figure 2 , a water inlet main pipe 6 and a water outlet main pipe 7 also penetrate through the bottom of the wellbore 40, and their numbers and the number of the above-mentioned water inlet branch pipes 5 can be selected according to actual situations. When multiple drainage branch pipes are connected from different directions, the high-speed water flows in different directions flow along the overflow surface through the energy dissipation bucket 3 to the flip bucket, and then are flipped into the air from different directions, collide to form a swirling roll, generating strong momentum exchange and shear action, canceling each other's kinetic energy, and the flow velocity gradually decreases. As Figure 2 shown, along the direction from the water inlet main pipe 6 to the water outlet main pipe 7, the water flow first passes through the plane 221, then passes through the third arc surface 220, is sent to the top 20 and flipped up, then falls onto the second arc surface, then enters the first arc surface, reaches the energy dissipation bucket 3 for energy dissipation, then is flipped up to the top surface 10, and then repeats the above process in reverse. The entire groove is a symmetric structure, so that the kinetic energy in the water flow can be eliminated as much as possible.

[0033] As an optimized solution of the embodiment of the present invention, a manhole cover 41 is provided at the upper part of the wellbore 40, and a cover seat 42 is fixed at the outer edge of the manhole cover 41. In this embodiment, providing this manhole cover 41 can facilitate later maintenance. Preferably, a ladder 43 is provided on the inner wall of the wellbore 40 for use during maintenance.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy dissipation trough for an energy dissipation well, characterized in that: It includes a first flow-throwing weir and a second flow-throwing weir. The first flow-throwing weir includes a top surface and a first overflow surface that smoothly extends outward from the top surface, and the top surface is higher than the first overflow surface. The second flow-throwing weir includes a top portion and a second overflow surface that extends in the direction of the first flow-throwing weir from the top portion, and the bottom of the second overflow surface is smoothly connected to the end of the extension of the first overflow surface. An energy dissipation bucket is provided at the lowest point of the first overflow surface. The top portion is higher than the top surface. There are multiple second flow-throwing weirs, and each of the second flow-throwing weirs encloses a ring shape. The first flow-throwing weir is located in the middle of the ring formed by each of the second flow-throwing weirs. The top surface is circular, and along the circumferential direction of the top surface, the first overflow surface is a closed curved surface. The first overflow surface is a first circular arc surface, the second overflow surface is a second circular arc surface, the first circular arc surface and the second circular arc surface are smoothly connected, and the first circular arc surface is a concave surface, and the second circular arc surface is a convex surface.

2. The energy dissipation trough for an energy dissipation well according to claim 1, characterized in that: The flow-throwing angle of the first overflow surface is between 15° and 35°, and the flow-throwing angle is the included angle between the tangent line of the first overflow surface corresponding to the position of the top surface and the horizontal direction.

3. The energy dissipation trough for an energy dissipation well according to claim 1, characterized in that: The second flow-throwing weir further includes a third overflow surface that extends in the direction away from the first flow-throwing weir from the top portion.

4. The energy dissipation trough for an energy dissipation well according to claim 3, characterized in that: The third overflow surface includes a third circular arc surface and a plane. The third circular arc surface extends downward from the top portion, and the plane extends downward and obliquely from the end of the extension of the third circular arc surface. The third circular arc surface and the second overflow surface are on the same circumferential surface.

5. The energy dissipation trough for an energy dissipation well according to claim 4, characterized in that, The relationship between the extension length of the third circular arc surface and the extension length of the second overflow surface satisfies the following formula: ； wherein, y is the height difference between the extended end of the third arc surface and the top, H d is the height difference between the water head height of the water inlet and the top, k and n are both fixed value coefficients and are both related to the slope of the plane, x is the horizontal distance between the top and the extended end of the second overflow surface.

6. An energy dissipation well includes a wellbore, characterized in that: It further includes the energy dissipation trough for an energy dissipation well according to any one of claims 1-5, and the energy dissipation trough is provided at the bottom inside the wellbore.

7. The energy dissipation well according to claim 6, characterized in that, It further includes an inlet branch pipe provided at a high position of the wellbore, and the water outlet of the inlet branch pipe is located directly above the second overflow surface.

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