Stepped rotational flow base cone type energy dissipation vertical shaft

Abstract

The utility model discloses a stepped rotational flow base cone type energy dissipation vertical shaft in the field of energy dissipation vertical shafts. Comprising an inner cylinder, a vertical shaft and a shield shaft, a plurality of drop steps and a plurality of widening steps are arranged between the inner cylinder and the vertical shaft, the vertical shaft comprises a straight cylinder part and a conical part, and the widening steps are arranged between the conical part and the inner cylinder; and the water inlet channel is connected with the water falling step through a connecting bend. The vertical shaft structure is reinforced through the shield shaft, the drop steps and the gradually-broadened steps are arranged, the radial widths of the gradually-broadened steps are gradually increased, and the vertical shaft corresponding to the gradually-broadened steps is a conical part, so that flowing water can be well drained to the bottom of the vertical shaft, impact damage to the wall of the vertical shaft is avoided, and a good energy dissipation effect is achieved; and the connecting bend is arranged at the joint of the water inlet channel and the water falling step, so that flowing water can be drained in the approximate tangential direction, and the buffering effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy dissipation vertical shaft field especially ladder spiral flow bottom cone form energy dissipation vertical shaft. BACKGROUND

[0002] Aiming at the characteristics of high building density, complex underground pipeline and heavy flood prevention safety pressure in large and medium-sized cities, large deep regulation and storage tunnel is adopted, which embodies the water control strategy of water according to water and local conditions. In the deep regulation and storage tunnel system, the vertical shaft is an important part of collecting rainwater into the deep tunnel, and bears the dual functions of drainage and exhaust. When the vertical shaft is high, the water level difference is large, and the structure needs to ensure that the collected water flow has the least influence on the vertical shaft and the main tunnel. In operation, the vertical shaft contains water flow, air flow and water vapor mixed flow, and the flow state is complex. The function needs to ensure that the water flow is smoothly connected to the main tunnel, and can effectively exhaust. However, in the actual engineering operation process, due to the large change of the flow of the same vertical shaft and the large water level difference, the phenomena of insufficient energy dissipation, serious water vapor mixing and complex flow state often occur in the vertical shaft. Therefore, it is necessary to study the optimization of water flow in the vertical shaft.

[0003] Therefore, there is an urgent need for a good vertical shaft structure form that meets different drainage requirements, and has good hydraulic characteristics, stable exhaust effect and suitable construction conditions, which provides a basis for vertical shaft design and operation. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a ladder spiral flow bottom cone form energy dissipation vertical shaft, which sets water drop steps and wide steps, and has a good energy dissipation effect.

[0005] To solve the above technical problems, the following technical solutions are adopted:

[0006] The utility model provides a ladder spiral flow bottom cone form energy dissipation vertical shaft, including inner tube, vertical shaft and shield structure well, the inner tube the vertical shaft and the shield structure well are concentric from inside to outside setting gradually, be equipped with a plurality of water drop steps and a plurality of wide steps between the inner tube and the vertical shaft, the wide step is located below the water drop step, the vertical shaft includes straight cylinder portion and conical portion, and the wide step is arranged between the conical portion and the inner tube.

[0007] It further includes a water inlet channel, which is connected with the water drop step through a connecting bend.

[0008] In the direction from the top to the bottom of the inner tube, the radial width of the wide steps increases one by one.

[0009] Optionally, the water drop steps and the wide steps are both circular arc shapes with the center of the inner tube as the center, and one end of each is closely attached to the outer wall of the inner tube, and the other end is closely attached to the inner wall of the vertical shaft.

[0010] Optionally, the angle of the step decreases gradually, and the decreasing direction is from the top to the bottom of the shaft.

[0011] Optionally, the angle of the step is 60°, and the height is 1 meter.

[0012] Optionally, the step is provided with at least three steps, and the height of the step is greater than the height of the drop step.

[0013] Optionally, the drop step is provided with at least ten steps, and the steps are arranged in a single spiral structure on the outer wall of the inner cylinder.

[0014] Optionally, the bottom of the drop step is provided with an exhaust hole, and the exhaust hole is a through hole penetrating from the outer wall of the inner cylinder to the inner wall.

[0015] Optionally, the bottom of the shaft is connected with the main tunnel.

[0016] Optionally, the first drop step at the top of the inner cylinder is provided with a tail sill, and the tail sill is located at one end close to the second drop step.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] 1. The shaft of the utility model is located between the shield well and the inner cylinder, the structure of the shaft is strengthened through the shield well, the drop step and the step are arranged, the radial width of the step increases gradually, the shaft corresponding to the step is a conical part, the water flow can be well discharged to the bottom of the shaft, the shaft wall is not damaged by the impact, the energy dissipation effect is good, and the connecting bend is arranged at the connection position of the water inlet channel and the drop step, the water flow can be discharged in the tangential direction, the inner cylinder wall is not directly impacted, and the buffering effect is good.

[0019] 2. The drop step and the step of the utility model are arc-shaped, the two ends are close to the outer wall of the inner cylinder and the inner wall of the shaft, the water flow is first dissipated through the drop step, then the water flow is dissipated through the step, the radial width of the step is large, the space of the step into which the water flow flows is increased, the water flow is uniformly discharged, and the energy dissipation is realized.

[0020] 3. The exhaust hole is arranged at the bottom of the drop step, and the gas in the water flow is well discharged during the water flow discharge process. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a side cross-sectional structure schematic view of the utility model;

[0022] Figure 2 is a top view structure schematic view of the utility model;

[0023] Figure 3 is a schematic diagram of the step arrangement structure of the inner cylinder and the outer wall thereof of the utility model;

[0024] Figure 4 is a schematic diagram of the drop step and exhaust hole structure of the utility model.

[0025] Mark explanation:

[0026] 1, water inlet channel; 2, connecting bend; 3, inner cylinder; 4, drop step; 5, tail sill; 6, shaft; 7, exhaust hole; 8, conical portion; 9, widening step; 10, shield well; 11, main tunnel. Specific implementation

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, rather than any limitation on the utility model and its application or use. Embodiment

[0028] The embodiment provides a ladder cyclone bottom cone form energy dissipation shaft, including inner cylinder 3, shaft 6 and shield well 10, as shown in the figure, the inner cylinder 3, the shaft 6 and the shield well 10 are sequentially concentrically arranged from inside to outside, a plurality of drop steps 4 and a plurality of widening steps 9 are arranged between the inner cylinder 3 and the shaft 6, the widening step 9 is located below the drop step 4, the shield well 10 is arranged to strengthen the structural stability of the shaft 6, and the drop step 4 and the widening step 9 are used for energy dissipation of water flow. Figure 1 The shaft 6 includes a straight cylinder portion and a conical portion 8, the conical portion 8 is located below the straight cylinder portion, the widening step 9 is arranged between the conical portion 8 and the inner cylinder 3, and the drop step 4 is arranged between the straight cylinder portion and the inner cylinder 3. In the direction from the top to the bottom of the inner cylinder 3, the radial width of the widening step 9 increases gradually. The radial width of each widening step 9 increases with the increase of the diameter of the conical portion 8, so that the outer end of the widening step 9 closely adheres to the inner wall of the conical portion 8.

[0029] As shown in the figure, it also includes a water inlet channel 1, the water inlet channel 1 is connected with the drop step 4 through the connecting bend 2; by arranging the connecting bend 2, water flow can flow in nearly tangential direction, and the connecting bend 2 can moderate the water flow of the water inlet channel 1 to enter between the inner cylinder 3 and the shaft 6, so as to avoid damage caused by the direct impact of water flow on the outer wall of the inner cylinder 3.

[0030] Figure 2

[0031] ​​In use, the flowing water enters the space between the inner cylinder 3 and the shaft 6 through the water inlet channel 1 and the connecting bend 2, and first passes through the plurality of water-drop steps 4 for energy dissipation. Each water-drop step 4 has the same specification. The flowing water after passing through the water-drop steps 4 for energy dissipation then passes through the gradually-widening steps 9 for energy dissipation. The gradually-widening steps 9 gradually increase in radial width, and gradually increase the space for the water flow, so as to avoid the water flow being difficult to dissipate in energy as the water depth increases closer to the bottom of the shaft 6, and also avoid damaging the shaft 6 and the inner cylinder 3. The water flow is uniformly discharged in the gradually-increasing space, so as to achieve energy dissipation. Embodiment

[0032] This embodiment provides a stepped spiral-flow bottom-cone type energy dissipation shaft 6 based on the embodiment 1, and the difference lies in that, as shown in the figure, the water-drop steps 4 and the gradually-widening steps 9 are both circular arc shapes with the center of the inner cylinder 3 as the center. One end of each of the water-drop steps 4 and the gradually-widening steps 9 is close to the outer wall of the inner cylinder 3, and the other end is close to the inner wall of the shaft 6. The whole presents a spiral structure arranged between the inner cylinder 3 and the shaft 6. Figure 2

[0033] In this embodiment, the water-drop steps 4 are provided with ten water-drop steps 4 from top to bottom of the inner cylinder 3, which are the first to the tenth water-drop steps 4. The first water-drop step 4 is connected with the connecting bend 2, and the tail end of the first water-drop step 4 is provided with the tail sill 5.

[0034] As shown in the figure, the exhaust hole 7 is arranged at the bottom of each water-drop step 4, and the exhaust hole 7 is located at the tail end of the water-drop step 4. Figure 4

[0035] In this embodiment, the angle of the water-drop step 4 is 60 degrees, and the height is 1 meter. The water-drop steps 4 are connected at the head and tail and are arranged in a spiral on the outer wall of the inner cylinder 3.

[0036] As shown in the figure, the gradually-widening steps 9 are provided with three gradually-widening steps 9 from top to bottom of the inner cylinder 3, which are the first to the third gradually-widening steps 9. The first gradually-widening step 9 is connected at the bottom end of the tail end of the tenth water-drop step 4. The angles of the first to the third gradually-widening steps 9 are 30°, 20° and 20° respectively, and the heights are 2.3 meters, 2.2 meters and 2.2 meters respectively. Through the increase of the height and the decrease of the length of the gradually-widening steps 9, the water flow is more smooth on the gradually-widening steps 9. Figure 3 The main tunnels 11 are connected at both sides of the bottom of the shield shaft 10, and the main tunnels 11 penetrate through the shield shaft 10 and are connected with the shaft 6. The main tunnels 11 at both sides are communicated through the gap between the inner cylinder 3 and the shaft 6. The water in the main tunnel 11 at one end and the water flowing from the water-drop steps 4 enter the main tunnel 11 at the other end.

[0037]

[0038] ​​​The water flow in the water inlet channel 1 enters the first drop step from the connecting bend 2 in a nearly tangential direction, is first decelerated by the tail sill 5 of the first drop step for the first time, and then is decelerated by the second to tenth drop steps, since the water flow is downward, potential energy is obtained in the flow process, and the speed gradually increases, the drop steps can slow down the increase of the speed, and achieve the deceleration effect, and the exhaust hole 7 is arranged on the drop step 4, and the exhaust hole 7 is used for exhausting the gas carried in the water flow. After passing through the drop step 4, the water flow enters the gradually widened step 9 again to be decelerated, the water flow entering the gradually widened step 9 has an increased flow width, the water flow is more fully decelerated, and the acting force on the inner cylinder 3 outer wall and the shaft 6 inner wall is reduced, and the water flow entering the bottom of the shield shaft 10 is fully decelerated and flows out through the main tunnel 11, the water flow flowing into the main tunnel 11 has a reduced speed, and the stability of the shaft 6 structure engineering is increased.

[0039] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should be regarded as the protection scope of the present application.

Claims

1. A stepped cyclone cone form energy dissipating shaft characterized by, The application relates to a water drop and widening step tunnel, which comprises an inner cylinder, a shaft and a shield well, the inner cylinder, the shaft and the shield well are arranged concentrically from inside to outside, a plurality of water drop steps and a plurality of widening steps are arranged between the inner cylinder and the shaft, the widening steps are arranged below the water drop steps, the shaft comprises a straight cylinder part and a conical part, the widening steps are arranged between the conical part and the inner cylinder. The water drop and widening step tunnel further comprises a water inlet channel, the water inlet channel is connected with the water drop steps through a connecting bend. The radial width of the widening steps increases one by one in the direction from the top to the bottom of the inner cylinder.

2. The stepped cyclone cone form energy dissipater of claim 1, wherein, The water drop steps and the widening steps are both arc-shaped with the center of the inner cylinder as the center, one end of each of the steps is close to the outer wall of the inner cylinder, and the other end is close to the inner wall of the shaft.

3. The stepped cyclone cone form energy dissipating shaft of claim 2, wherein, The angle of the widening steps decreases, and the decreasing direction is from the top to the bottom of the shaft.

4. The stepped cyclone cone form energy dissipator of claim 2, wherein, The angle of the water drop steps is 60 DEG, and the height is 1 m.

5. The stepped cyclone cone form energy dissipator of claim 1, wherein, The widening steps are at least three, and the height of the widening steps is greater than that of the water drop steps.

6. The stepped cyclone cone form energy dissipator of claim 1, wherein, The water drop steps are at least ten, and are arranged on the outer wall of the inner cylinder in a single helical structure.

7. The stepped cyclone cone form energy dissipator of claim 1, wherein, The bottom of the water drop steps is provided with exhaust holes, and the exhaust holes are through holes penetrating from the outer wall to the inner wall of the inner cylinder.

8. The stepped cyclone cone form energy dissipator of claim 1, wherein, The bottom of the shaft is connected with a main tunnel.

9. The stepped cyclone cone form energy dissipator of claim 1, wherein, A tail sill is arranged on the first water drop step of the top of the inner cylinder, and the tail sill is arranged at one end close to the second water drop step.

Images