A pressure flow roof rainwater pipe energy dissipator
By installing a pressure flow roof stormwater pipe energy dissipator with a cyclonic hedging structure in the rainwater drainage pipeline, the existing energy dissipation measures are solved, with high cost, large area and complex construction problems, and the effect of reducing the impact of the flow rate of the rainwater pipe and saving space and cost is achieved.
Patent Information
- Application Number
- CN202421361779.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-06-14
AI Technical Summary
Existing rainwater energy dissipation measures such as the high cost of reinforced concrete energy dissipation wells, large space, and complex construction, which have inconveniences.
A pressure flow roof rainwater pipe energy dissipator is designed, which is installed in the rainwater drainage pipe, including the rainwater flow inlet, buffer pipe and rainwater flow outlet. The side walls of the buffer pipe have multiple convex arc surfaces, and the runner baffle is smoothly connected to the arc surface to form a cyclonic hedging structure to reduce the flow rate of the fluid.
The spiral hedging structure reduces the impact of the fluid flow rate of the stormwater riser, extends the service life of the stormwater pipeline, saves space and costs, and avoids the use of energy dissipation wells.
Smart Images
Figure CN222701366U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an energy dissipator, in particular to a pressure flow roof rainwater pipe energy dissipator. Background Art
[0002] When the roof rainwater adopts a siphon drainage system, when the rainfall changes from small to large, the rainwater pipe will present wave flow, pulsating flow, full pipe gas-water mixed emulsified flow, and then single-phase flow of water, that is, full liquid state. When the full liquid flow is present, the drainage pipe enters the siphon flow condition and presents a pressure flow state. The drainage capacity of the drainage system in the pressure flow state is larger and the effect is better. However, since the flow velocity of the riser should not be greater than 10m / s, and the flow velocity of the transition section downstream of the riser should not be greater than 1.8m / s, when it exceeds the allowable value, the rainwater pipe system should be equipped with energy dissipation measures.
[0003] At present, the main rainwater energy dissipation measures are reinforced concrete energy dissipation wells. However, due to the disadvantages of large cost and space occupation, complex construction, and high cost of energy dissipation wells, there are many inconveniences in actual use. Utility Model Content
[0004] The purpose of the utility model is to overcome the defects of the above-mentioned prior art and provide a pressure flow roof rainwater pipe energy dissipator, which effectively saves space, is easy to install and effectively saves costs.
[0005] The purpose of the utility model can be achieved through the following technical solutions:
[0006] A pressure flow roof rainwater pipe energy dissipator, which is arranged in a rainwater drainage pipe, comprises:
[0007] A rainwater inlet, wherein the rainwater inlet is connected to an upstream pipe of the rainwater drainage pipe;
[0008] A buffer pipe, wherein two opposite side walls of the buffer pipe include a plurality of convex curved surfaces connected in sequence from top to bottom, and a curved flow channel baffle is extended inwardly and obliquely upwardly from the connection points of adjacent convex curved surfaces into the pipe, wherein the convex curved surfaces on the two side walls are arranged alternately up and down, and the end of the upper curved flow channel is located above the lower curved flow channel;
[0009] A rainwater outflow outlet is connected to a downstream pipe of the rainwater drainage pipe.
[0010] Furthermore, an initial baffle is provided at the top of the buffer pipe.
[0011] Furthermore, the initial baffle is a straight plate arranged obliquely downward.
[0012] Furthermore, the angle between the initial baffle and the vertical axis of the buffer pipe is 30°-50°.
[0013] Furthermore, the flow channel baffle is smoothly connected to the lower end of the upper convex arc surface.
[0014] Furthermore, the angle between the tangent line of the flow channel baffle and the vertical axis of the buffer pipe is 30°-50°.
[0015] Furthermore, the diameter of the buffer pipe is larger than the diameters of the rainwater inlet and the rainwater outlet.
[0016] Furthermore, connecting plates are respectively provided at transition points between the buffer pipe and the rainwater inlet and the rainwater outlet.
[0017] Furthermore, the connecting plate covers the upper and lower outlets of the buffer pipe, wherein the connecting plate is provided with a circular opening having the same diameter as the rainwater inlet and the rainwater outlet to allow rainwater to flow into / out of the buffer pipe.
[0018] Furthermore, the rainwater inlet and the rainwater outlet are also provided with connection components for connecting with upstream and downstream pipes of the rainwater drainage pipe.
[0019] Compared with the prior art, the utility model has the following advantages:
[0020] (1) The utility model utilizes the flow channel structure to make the fluid form a vortex flow to collide with the main fluid, thereby reducing the impact of the high-velocity fluid in the pipeline. The faster the flow rate, the greater the kinetic energy, and the more obvious the vortex counterflow effect, thereby reducing the scouring of the rainwater pipe by the excessive fluid flow rate in the rainwater riser, thereby extending the service life of the rainwater pipe, and at the same time eliminating the energy dissipation well, saving space and cost.
[0021] (2) The utility model is based on the structural principle of the Tesla valve. When high-speed rainwater falls in the vertical pipe, it impacts the buffer of the utility model. Through the special structure of the buffer, the fluid is braked and slowed down, the flow rate of the rainwater vertical pipe is reduced, and the kinetic energy generated by the falling process from a high place is eliminated.
[0022] (3) The flow channel of the utility model is a swirling counter-flow structure, that is, the kinetic energy of the fluid is converted into a counter-flow in the opposite direction of the mainstream to counteract the mainstream, thereby offsetting each other's energy and achieving the purpose of energy dissipation. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a longitudinal cross-sectional view of a pressure flow roof rainwater pipe energy dissipator of the utility model;
[0024] Figure 2 This is a structural schematic diagram of a connecting plate of a pressure flow roof rainwater pipe energy dissipator of the utility model;
[0025] Figure 3 It is a working schematic diagram of a pressure flow roof rainwater pipe energy dissipator of the utility model;
[0026] Reference numerals:
[0027] Rainwater inlet 1, buffer pipe 2, flow channel baffle 3, rainwater outflow outlet 4, initial baffle 5, connecting plate 6, round mouth 7, clamp 8, siphon rainwater bucket 9, suspension pipe 10, fixed pipe clamp 11, drain port 12, energy dissipator A, roof B, exterior wall C, 1# flow channel space 1#, 2# flow channel space 2#, 3# flow channel space 3#, 4# flow channel space 4#, 5# flow channel space 5#, 6# flow channel space 6#, outflow channel 7#. DETAILED DESCRIPTION
[0028] The following is a detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms and other features not clearly described in this technical solution are all considered to be common technical features disclosed in the prior art.
[0029] Example
[0030] This embodiment provides a pressure flow roof rainwater pipe energy dissipator, such as Figure 1 As shown, the rainwater pipe energy dissipator is installed in the rainwater drainage pipe, and its installation diagram is as shown in Figure 3 As shown, the energy dissipator A comprises:
[0031] A rainwater inlet 1 connected to the upstream pipe of the rainwater drainage pipe, and a rainwater outlet 4 connected to the downstream pipe of the rainwater drainage pipe,
[0032] Among them, the rainwater inlet 1 and the rainwater outlet 4 are provided with connecting components for connecting with the upstream and downstream pipes of the rainwater drainage pipe. In this embodiment, the connecting component is a clamp 8. In some preferred embodiments, the connecting component can also be a flange or other connection method. Through the setting of the connecting component, the energy dissipator is equivalent to a pipe fitting and can be installed on the riser pipeline of the rainwater drainage pipe. It is easy to install and saves space.
[0033] The buffer pipe 2 plays a buffering role in the pressure flow roof rainwater pipe energy dissipator. The two opposite side walls of the buffer pipe 2 include a plurality of convex arc surfaces connected in sequence from top to bottom. The connection points of adjacent convex arc surfaces extend an arc-shaped flow channel baffle 3 into the pipe and obliquely upward. The flow channel baffle 3 and the connected upper convex arc surface form an arc flow channel.
[0034] The convex arc surfaces on the two side walls are arranged alternately up and down so that the end of the upper arc flow channel is located above the next arc flow channel, wherein the center angle of the first and last convex arc surfaces on the single side wall is 90°, and the center angle of the first and last convex arc surfaces is 180°.
[0035] In this embodiment, the flow channel baffle 3 is smoothly connected to the lower end of the upper convex arc surface, and the angle between the tangent of its outer end and the vertical axis of the buffer pipe 2 is 45°, and points to the connection point of the opposite and upper convex arc surface (so that part of the rainwater raised from the flow channel baffle 3 is blocked by the upper flow channel baffle 3 to form a vortex flow, and the other part enters the next buffer area along the convex arc surface.
[0036] In this embodiment, an initial baffle plate 5 is also provided at the top of the buffer pipe 2 and is arranged obliquely downward. The initial baffle plate 5 points to the inner side of the uppermost convex arc surface to divert rainwater to the first buffer area. The angle between the initial baffle plate 5 and the vertical axis of the buffer pipe 2 is 45°, and in the projection of the vertical axis direction of the buffer pipe 2, it covers 70-80% of the projection area of the rainwater inlet 1.
[0037] In this embodiment, the diameter of the buffer pipe 2 is larger than the diameter of the rainwater inlet 1 and the rainwater outlet 4, so a connecting plate 6 is further provided at the transition between the buffer pipe 2 and the rainwater inlet 1 and the rainwater outlet 4. Figure 2 As shown, the connecting plate 6 is provided with a circular opening 7 with the same diameter as the rainwater inlet 1 and the rainwater outlet 4, so that rainwater can flow into / out of the buffer pipe 2.
[0038] In this embodiment, the energy dissipator A is further provided with a drainage port 12. When the amount of rainwater is small, the liquid can be directly discharged through the drainage port 12 at the bottom of each flow channel.
[0039] When the pressure flow roof rainwater pipe energy dissipator provided in this embodiment is used:
[0040] First, install the energy dissipator A in the rainwater drainage pipe. Figure 3 As shown, in some preferred embodiments, the energy dissipator A can be installed at the bottom of the riser of the siphon rainwater drainage system. If the building is too high and the riser is too long, an energy dissipator can be installed on the long riser for every 10-15m height difference;
[0041] When rainwater from roof B flows into the short pipe through the siphon rainwater gutter 9, and then flows into the rainwater riser through the suspension pipe 10 (the rainwater riser is fixed on the outer wall C through the fixed pipe clamp 11), the rainwater at this time has very high kinetic energy. The rainwater with high kinetic energy enters the buffer pipe 2 through the rainwater inlet 1 on the energy dissipator A installed on the riser, and is buffered for the first time through the initial baffle 5; after the first buffering, the rainwater continues to flow downward into the 1# flow channel space, and enters the 2# flow channel space through the diversion effect of the flow channel baffle 3 in the 1# flow channel space. At this time, the water flow is divided into two parts under the action of the flow channel baffle 3 in the 1# area. The first part forms a vortex flow in the channel. This vortex flow The swirl flow and the high-speed fluid entering the 2# flow channel space offset and dissipate energy to achieve the purpose of energy dissipation. The other part passes through the diversion of the flow channel baffle of the 2# flow channel space and enters the 3# flow channel space; the fluid entering the 3# flow channel space produces a similar swirl flow offset and buffering effect. Similarly, the fluid entering the 4# flow channel space, the 5# flow channel space and the 6# flow channel space undergo multiple swirl flow offsets and eventually forms a balanced state. When the fluid flow rate decreases to a certain level, due to the decrease in kinetic energy, the flow rate decreases and it cannot form a backflow. The water level overflows the flow channel baffle of the channel and directly flows into the next flow channel space or outflow channel 7#, and finally flows out of the rainwater outlet 4 with less kinetic energy.
[0042] When the amount of rainwater is small and insufficient to form a swirling flow, the liquid can be directly drained through the drain port 12 at the bottom of each flow channel. At the same time, the drain port 12 can also drain the liquid in the energy dissipator A in the absence of rainwater to prevent corrosion caused by long-term rainwater accumulation. In the pressure flow state, the rainwater is large and the upper and lower pressure differences are large. The drain port 12 can also well connect the upper and lower channels to reduce the pressure difference between adjacent flow channels.
[0043] Through the action of the energy dissipator A, the flow rate of rainwater entering the outdoor rainwater inspection well is reduced, the kinetic energy is reduced, and the high-speed scouring of the inspection well by high-kinetic energy rainwater is prevented. Under the action of this energy dissipator A, the energy dissipation of the pressure flow roof rainwater pipe is realized, and the rainwater can be directly discharged into the outdoor rainwater inspection well without setting up an energy dissipation well.
[0044] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.
Claims
1. A pressure flow roof rainwater pipe energy dissipator, which is arranged in a rainwater drainage pipe, characterized in that: include: A rainwater inlet (1), the rainwater inlet (1) being connected to an upstream pipe of a rainwater drainage pipe; A buffer pipe (2), wherein two opposite side walls of the buffer pipe (2) include a plurality of convex curved surfaces connected in sequence from top to bottom, and a curved flow channel baffle (3) extends inwardly of the pipe and obliquely upward at the connection points of adjacent convex curved surfaces, wherein the convex curved surfaces on the two side walls are arranged alternately up and down, and the end of the upper curved flow channel is located above the lower curved flow channel; A rainwater outflow outlet (4), wherein the rainwater outflow outlet (4) is connected to a downstream pipe of a rainwater drainage pipe.
2. The pressure flow roof rainwater pipe energy dissipator according to claim 1, characterized in that: An initial baffle (5) is also provided at the top end of the buffer pipe (2).
3. The pressure flow roof rainwater pipe energy dissipator according to claim 2, characterized in that: The initial baffle (5) is a straight plate arranged obliquely downward.
4. The pressure flow roof rainwater pipe energy dissipator according to claim 2, characterized in that: The included angle between the initial baffle plate (5) and the vertical axis of the buffer pipe (2) is 30°-50°.
5. The pressure flow roof rainwater pipe energy dissipator according to claim 1, characterized in that: The flow channel baffle (3) is smoothly connected to the lower end of the upper convex arc surface.
6. The pressure flow roof rainwater pipe energy dissipator according to claim 5, characterized in that: The included angle between the tangent line of the flow channel baffle (3) and the vertical axis of the buffer pipe (2) is 30°-50°.
7. The pressure flow roof rainwater pipe energy dissipator according to claim 1, characterized in that: The caliber of the buffer pipe (2) is larger than the calibers of the rainwater inlet (1) and the rainwater outlet (4).
8. The pressure flow roof rainwater pipe energy dissipator according to claim 1, characterized in that: Connecting plates (6) are also provided at the transition points between the buffer pipe (2) and the rainwater inlet (1) and the rainwater outlet (4).
9. The pressure flow roof rainwater pipe energy dissipator according to claim 8, characterized in that: The connecting plate (6) covers the upper and lower outlets of the buffer pipe (2), wherein the connecting plate (6) is provided with a circular opening (7) having the same diameter as the rainwater inlet (1) and the rainwater outlet (4) so that rainwater can flow into / out of the buffer pipe (2).
10. The pressure flow roof rainwater pipe energy dissipator according to claim 1, characterized in that: The rainwater inlet (1) and the rainwater outlet (4) are also provided with connection components for connecting to upstream and downstream pipes of a rainwater drainage pipe.