Collision energy dissipation equipment with outlet steel ring

Abstract

The utility model discloses collision energy dissipation equipment with an outlet steel ring, which comprises an energy dissipation assembly for shunting and dissipating energy of a water body in a water delivery pipeline, the energy dissipation assembly comprises a flow guide seat and a pipeline water diversion cone, the flow guide seat and the water delivery pipeline are coaxially arranged at an interval, and an annular water body intersection outlet is formed at the interval; a return type flow channel structure is formed between the pipeline water diversion cone and the flow guide base and between the pipeline water diversion cone and the water conveying pipeline, water subjected to collision energy dissipation through the return type flow channel structure is injected into an energy dissipation cavity formed by the water retaining component and the flow guide component from a water intersection outlet, and the energy dissipation cavity is communicated with external static water. Water in the water conveying pipeline is distributed through the return type flow channel structure, the water enters the energy dissipation cavity for further energy dissipation after collision energy dissipation at an intersection outlet, a high-pressure area is formed, the negative pressure of the outlet is reduced so as to stabilize the energy dissipation process, then the water is regularly ejected out and shears and rubs with external static water, kinetic energy is converted into other energy till the water is static, and energy dissipation is achieved. And a high-water-head and large-flow energy dissipation task is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water transfer engineering technical field, concretely relates to a kind of collision energy dissipation equipment with outlet steel ring. BACKGROUND

[0002] In water conservancy project, energy dissipation refers to the huge energy carried by water flow is consumed by reasonable energy dissipation mode, and then safely and smoothly guided to downstream. In China, energy dissipation channel or energy dissipation device is often used to complete the purpose of energy dissipation in water diversion project, for example, building energy dissipation power station, water turbine generator set can not only ensure the safety of water supply system, but also increase the economic value of water diversion project. However, the construction of energy dissipation power station must also ensure that the core task of water supply cannot be interrupted under any adverse conditions, therefore, any energy dissipation power station in water diversion project needs to build a bypass channel to realize the water supply task under extreme accident conditions of power station, how to safely guide the raw water to downstream water point needs to be fully planned and designed in combination with various environmental conditions, facility conditions and economic conditions in the project. At the same time, in long-distance, high-head and large-flow water diversion project, how to safely and stably complete the water supply task is also the core task to be solved, and in water diversion project, the allocation of water resources is also the key and difficult point of water supply task, which requires that on the basis of safe water supply, the demand of water resources regulation should also be met, therefore, the scene of flow regulation and energy dissipation in the project is increasing, the design of flow regulation and energy dissipation related project and the development of special equipment are becoming more and more important. CONTENT OF UTILITY MODEL

[0003] The utility model aims at providing a kind of collision energy dissipation equipment with outlet steel ring, which divides the water body in water pipeline into two water flows by return type flow channel structure, and the two water flows collide at the water body intersection outlet for energy dissipation, the collided water body is injected into the energy dissipation cavity formed between the water retaining part and the flow guide part for further energy dissipation, and the water body forms a certain high pressure area in the energy dissipation cavity, thereby reducing the negative pressure at the outlet, making the energy dissipation process more stable, at the same time, the collided water body is regularly ejected from the energy dissipation cavity, and after shearing friction with external static water body, the kinetic energy of water flow is gradually converted into heat, noise and other energy, and finally tends to be static, realizing the energy dissipation task of high head and large flow.

[0004] The utility model realizes the following technical scheme:

[0005] The application discloses a kind of colliding energy dissipation equipment with outlet steel ring, including the energy dissipation component of water body in water pipeline is branched and energy dissipated, the energy dissipation component includes guide seat and pipeline water distribution cone, the guide seat is coaxial with the water pipeline and interval arrangement, and annular water body intersection outlet is formed at interval, the pipeline water distribution cone forms return type flow channel structure between the guide seat and the water pipeline respectively, water body after colliding energy dissipation in return type flow channel structure is injected into energy dissipation cavity formed by water retaining component and guide component from the water body intersection outlet, and the energy dissipation cavity is communicated with external static water body.

[0006] In the present application, the coaxial interval arrangement of the guide seat in the energy dissipation component and the water pipeline and the return type flow channel structure formed by the pipeline water distribution cone constitute the basis of water body branching and energy dissipation, so that the water flow can move in a specific path and collide to achieve preliminary energy dissipation; and the energy dissipation cavity formed outside the water body intersection outlet forms a high-pressure area for the water body, thereby reducing the influence of negative pressure at the outlet, making the energy dissipation process more stable, and further guiding the flow of water after energy dissipation and energy conversion through communication with the external static water body, completely dissipating the kinetic energy of the water flow by shear friction, and efficiently completing the energy dissipation task of high water head and large flow.

[0007] As an optimized scheme of the colliding energy dissipation equipment, the water retaining component and the guide component are respectively connected to the outer walls of the water body intersection outlet.

[0008] The side wall surface of the water retaining component forms a protruding structure extending towards the guide component, and the protruding structure forms a water retaining front surface for resisting the jet flow towards the wall surface of the water body intersection outlet, and the water retaining front surface and the side wall surface of the guide component form the energy dissipation cavity.

[0009] In the present application, the layout of the water retaining component and the guide component connected to the outer walls of the water body intersection outlet ensures that the water flow injected from the water body intersection outlet can be effectively guided and constrained. The protruding structure of the side wall surface of the water retaining component and the water retaining front surface formed thereby can directly face and resist the impact force of the jet flow, effectively reducing the turbulence and disorder of the water flow, and avoiding energy dispersion and uneven stress on the equipment caused by high-speed impact. Moreover, the water retaining front surface and the side wall surface of the guide component together form the energy dissipation cavity, which provides a space for energy dissipation for the water flow, so that the water flow can further convert the remaining kinetic energy into other forms of energy, such as heat energy and sound energy, in the cavity through complex hydrodynamic processes such as turbulence and impact, thereby greatly improving the energy dissipation efficiency of the entire equipment, ensuring the stability and reliability of the energy dissipation process, and enabling the equipment to maintain good operating performance and energy dissipation effect when facing high water head and large flow.

[0010] As an optimization scheme of the impinging dissipater, the extension length of the water-stopping front face is equal to or greater than the width of the water body confluence outlet.

[0011] In the present scheme, the extension length of the water-stopping front face is equal to or greater than the width of the water body confluence outlet, which can ensure that the water flow from the water body confluence outlet is fully and effectively blocked and buffered. When the water flow is ejected, the larger water-stopping front face area can more fully disperse the water flow impact force, avoid local excessive pressure from causing damage to the equipment, and guide the water flow to enter the energy dissipation cavity more evenly, so that the energy conversion process of the water flow in the energy dissipation cavity is more stable and efficient.

[0012] As an optimization scheme of the impinging dissipater, the side wall face of the flow guide component is a flow guide face with an inclination angle.

[0013] In the present scheme, when the water flow after energy dissipation enters the energy dissipation cavity from the water body confluence outlet, the inclined flow guide face can guide the water flow to flow in a specific direction and angle, avoiding the formation of turbulent flow or vortex in the cavity, and reducing unnecessary energy loss and equipment vibration. The existence of the inclination angle makes the water flow gradually change direction under the action of the flow guide face, realizing a more orderly flow state conversion, which helps to further optimize the shear friction process between the water flow and the external static water body, and improve the energy conversion efficiency.

[0014] As an optimization scheme of the impinging dissipater, the inclination angle of the flow guide face is in the range of 30°-90°.

[0015] In the present scheme, when the inclination angle is in this interval, the water flow can obtain a suitable flow speed and flow direction change in the energy dissipation cavity, avoiding problems such as being unable to effectively guide the water flow due to too small angle, or too large angle leading to too violent water flow impact and unreasonable energy loss. At 30°, the water flow can be guided to turn smoothly; as the angle gradually increases to 90°, the change effect on the water flow gradually increases, which can adapt to different water flow conditions of flow rate and speed.

[0016] As an optimization scheme of the impinging dissipater, the wall face of the convex structure facing away from the water body confluence outlet forms a water-stopping back face for supporting the water-stopping front face, and the water-stopping back face is inclinedly arranged and connected with the water-stopping front face through a water-stopping transition face.

[0017] In the present scheme, when the high-speed water flow impacts the water-stopping front face, the inclined water-stopping back face can effectively disperse the pressure exerted by the water flow, avoid deformation or damage of the water-stopping front face due to excessive force on a single point, and ensure that it can continuously and stably offset the jet flow. The water-stopping transition face plays a buffering and transition role, so that the water flow can enter the energy dissipation cavity more smoothly after passing through the water-stopping front face, ensuring the continuity and efficiency of the energy dissipation process.

[0018] As an optimization scheme of the collision energy dissipation device, a second flow channel is formed between the front section of the pipeline water distribution cone and the water conveying pipe for distributing part of the water body, and a first flow channel is formed between the middle section of the pipeline water distribution cone and the rear guide seat for distributing another part of the water body, and the two parts of the water body collide at the water body intersection outlet through different flow channels.

[0019] In the scheme, the water body in the water conveying pipe is effectively distributed into two parts, which collide at the water body intersection outlet through different paths. This makes the water flow consume a large amount of energy through internal collision before entering the energy dissipation cavity, thereby enhancing the energy dissipation effect. The setting of different flow channels can precisely control the distribution ratio and water flow speed, ensure the stability and efficiency of the collision process, and adapt to the changes of water flow and flow speed under different working conditions.

[0020] As an optimization scheme of the collision energy dissipation device, the energy dissipation assembly further comprises an internal water distribution cone located in the middle section of the first flow channel, one end of the internal water distribution cone being connected to the guide seat, and the other end of the internal water distribution cone extending towards the water conveying pipe.

[0021] In the scheme, the water flow passing through the first flow channel is more precisely allocated and guided under the action of the internal water distribution cone. The structure design of one end being connected to the guide seat and the other end extending towards the water conveying pipe effectively changes the flow state and flow speed distribution of the water flow in the first flow channel, avoids local concentration or disorder of the water flow, and enhances the uniformity and stability of the distribution. This helps to improve the subsequent collision energy dissipation effect at the water body intersection outlet, so that the two parts of the water flow can exchange energy more fully during the collision, thereby improving the overall energy dissipation efficiency.

[0022] As an optimization scheme of the collision energy dissipation device, the radial cross-sectional area of the first flow channel and the second flow channel at the water inlet is equal, and is half of the radial cross-sectional area of the water conveying pipe.

[0023] In the scheme, the radial cross-sectional area of the first flow channel and the second flow channel at the water inlet is equal and is half of the radial cross-sectional area of the water conveying pipe, which ensures that the water flow distributed from the water conveying pipe to the two flow channels can be relatively balanced. In the working condition of high water head and large flow, uniform distribution is the basis for efficient energy dissipation. If the cross-sectional area of the flow channel is greatly different, it will lead to uneven distribution of water flow speed and pressure, affecting the subsequent collision effect at the water body intersection outlet, and reducing the energy dissipation efficiency.

[0024] As an optimization scheme of the collision energy dissipation device, a plurality of connecting plates are connected between the internal water distribution cone and the pipeline water distribution cone, and between the pipeline water distribution cone and the water conveying pipe.

[0025] In the scheme, the connecting plate enhances the connection strength and structural stability between components. Under the impact of high water head and large flow, the device faces great pressure and vibration, and the connecting plate can effectively disperse stress, prevent displacement or loosening between components, and ensure the accuracy and stability of the flow splitting and energy dissipation process.

[0026] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0027] 1. The energy dissipation assembly of the utility model realizes more efficient and stable flow splitting and collision energy dissipation of water body through the synergistic effect of the flow guide seat and the pipeline water separation cone. Compared with the possible simple flow splitting or insufficient energy dissipation in the prior art, the utility model can effectively cope with complex working conditions of high water head and large flow;

[0028] 2. The water body in the utility model is collided after entering the energy consumption cavity through the return type flow channel, and the energy consumption cavity further optimizes the energy dissipation process, and the energy consumption cavity is communicated with the external static water body, so that the water flow can finally fully convert kinetic energy into other forms of energy, avoiding the possible energy residue or unstable energy dissipation in the prior art, effectively reducing the negative pressure at the outlet, and ensuring the safety and stability of the energy dissipation process. BRIEF DESCRIPTION OF DRAWINGS

[0029] The drawings described herein are used to provide further understanding of the embodiments of the utility model, constitute a part of the application, and do not constitute a limitation on the embodiments of the utility model. In the drawings:

[0030] Figure 1 It is a structural schematic view of the embodiment 1 of the utility model;

[0031] Figure 2 It is a structural schematic view of the embodiment 2 of the utility model;

[0032] Figure 3 It is a structural schematic view of the embodiment 3 of the utility model;

[0033] Figure 4 It is the geometric parameter and simulation result of the embodiment 2;

[0034] Figure 5 It is the velocity distribution diagram of the embodiment 2 when the inlet diameter is 1000mm;

[0035] Figure 6 It is the velocity distribution diagram of the embodiment 2 when the inlet diameter is 700mm;

[0036] Figure 7 It is the velocity distribution diagram of the embodiment 2 when the inlet diameter is 500mm;

[0037] Figure 8Velocity profile for Example 2 with an inlet diameter of 400 mm;

[0038] Figure 9 Pressure profile for Example 2 with an inlet diameter of 1000 mm;

[0039] Figure 10 Pressure profile for Example 2 with an inlet diameter of 700 mm;

[0040] Figure 11 Pressure profile for Example 2 with an inlet diameter of 500 mm;

[0041] Figure 12 Pressure profile for Example 2 with an inlet diameter of 400 mm.

[0042] Markings in the drawings and corresponding names of parts:

[0043] 1 - concrete foundation, 2 - water retaining part, 3 - back of water retaining part, 4 - front of water retaining part, 5 - transition surface of water retaining part, 6 - flow guiding part, 7 - flow guiding surface, 8 - water body meeting outlet, 9 - pipe water distribution cone, 10 - first flow channel, 11 - inner water distribution cone, 12 - second flow channel, 13 - water conveying pipe, 14 - flow guiding seat. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the utility model more clearly and clearly, the utility model is further explained in detail below by combining with examples and drawings, the schematic implementation mode and the explanation thereof of the utility model are only used for explaining the utility model, and do not be regarded as the limitation of the utility model.

[0045] Example 1

[0046] This embodiment 1 provides a kind of collision energy dissipation equipment with outlet steel ring, as shown in Figure 1 The energy dissipation equipment is buried below the concrete foundation 1 of pool, including the water body in water conveying pipe 13 is shunted and the energy dissipation assembly of energy dissipation, and the energy dissipation assembly includes flow guiding seat 14 and pipe water distribution cone 9, flow guiding seat 14 is coaxial with water conveying pipe 13 and is spaced apart, and annular water body meeting outlet 8 is formed at interval, pipe water distribution cone 9 respectively with flow guiding seat 14 and water conveying pipe 13 between forming return type flow channel structure, after the water body from water body meeting outlet 8 after being collided and dissipated by return type flow channel structure, is injected into the energy dissipation cavity formed by water retaining part 2 and flow guiding part 6, and energy dissipation cavity is communicated with external static water body;

[0047] Specifically, the second flow channel 12 is formed between the front section of the pipeline water distribution cone 9 and the water delivery pipe 13, which is used to distribute part of the water in the water delivery pipe 13, and the first flow channel 10 with an arc-shaped return face is formed between the middle section of the pipeline water distribution cone 9 and the rear guide seat 14, which is used to distribute another part of the water in the water delivery pipe 13, and the radial cross-sectional area of the first flow channel 10 and the second flow channel 12 at the water inlet is equal, which is half of the radial cross-sectional area of the water delivery pipe 13, and the two equal-volume water bodies are guided through the first flow channel 10 and the second flow channel 12 respectively and collide at the water body intersection outlet 8 to complete the preliminary energy dissipation.

[0048] Meanwhile, the energy dissipation assembly further includes an inner water distribution cone 11 in the middle section of the first flow channel 10, one end of the inner water distribution cone 11 is connected to the guide seat 14, and the other end of the inner water distribution cone 11 extends to the water delivery pipe 13, at this time, the inner water distribution cone 11 and the pipeline water distribution cone 9 and the pipeline water distribution cone 9 and the water delivery pipe 13 are fixed through the connecting plates to form an integral whole.

[0049] When the water body after completing the preliminary energy dissipation is injected into the energy consumption cavity at a high speed in a ring shape from the water body intersection outlet 8 in all directions of 360°, the energy consumption cavity further guides the flow and energy conversion of the water body after energy dissipation, specifically, the water blocking component 2 and the guide component 6 are connected to the two sides of the outer wall of the water body intersection outlet 8 respectively, wherein the side wall surface of the water blocking component 2 forms a protruding structure extending to the guide component, the protruding structure forms a water blocking front face 4 for resisting the jet flow towards the wall surface of the water body intersection outlet 8, in order to ensure that the water flow injected from the water body intersection outlet 8 is fully and effectively blocked and buffered, the extension length of the water blocking front face 4 is equal to the width of the water body intersection outlet 8, and the water blocking front face 4 and the side wall surface of the guide component 6 form the energy consumption cavity.

[0050] Meanwhile, in order to avoid deformation or damage of the water blocking front face 4 due to excessive force on a single point, the wall surface of the protruding structure away from the water body intersection outlet 8 forms a water blocking back face 3 for supporting the water blocking front face 4, the water blocking back face 3 is inclined at an angle of 60° and connected to the water blocking front face 4 through a water blocking transition face 5, and the water blocking transition face 5 is a circular arc surface.

[0051] In the embodiment, the side wall surface of the guide component 2 is a guide surface 7 with an inclination angle, and the inclination angle is in the range of 30°-90°, in order to avoid the problems of being unable to effectively guide the water flow due to too small angle or too large angle leading to too violent water flow impact and unreasonable energy loss, and in addition, the inclination angle of the guide surface 7 is set to 30°, which can avoid the generation of negative pressure at the water flow outlet while guiding the water flow to the outlet.

[0052] The energy is further dissipated by the energy dissipation cavity, and the water after dissipation enters the external static water body, and the shear friction is used to completely consume the water flow energy, so that the energy dissipation task of high water head and large flow is efficiently completed.

[0053] Embodiment 2

[0054] In order to make the water body intersection outlet 8 produce a certain outlet high pressure area, and make the outlet water flow collision energy dissipation efficiency improve, embodiment 2 provides another kind of collision energy dissipation equipment with an outlet steel ring based on the scheme of embodiment 1, as shown in Figure 2 The difference is that the inclination angle of the flow guide surface 7 is set to 90°, as shown in the water simulation diagram Figures 4-12 As shown in the water simulation diagram

[0055] Embodiment 3

[0056] In order to make the water body intersection outlet 8 produce a larger outlet high pressure area, and make the outlet water flow collision energy dissipation efficiency greatly improve, embodiment 3 provides another kind of collision energy dissipation equipment with an outlet steel ring based on the scheme of embodiment 2, as shown in Figure 3 The difference is that the inclination angle of the flow guide surface 7 is set to 90°, and the extension length of the water blocking front surface 4 is greater than the width of the water body intersection outlet 8. The larger extension length of the water blocking front surface 4 can more effectively constrain and guide the water flow. When the water flow is shot out from the water body intersection outlet 8, the water blocking front surface 4 beyond the outlet width can more comprehensively cover the diffusion range of the water flow, so that the water flow is gathered and turned in a smaller space. This constraint makes the flow velocity of the water flow rapidly increase in the local area, and according to Bernoulli's principle, the flow velocity increase will cause the pressure to decrease, thereby forming a relatively high pressure area around.

[0057] Secondly, due to the blocking and guiding of the water blocking front surface 4, the water flow will be more strongly reflected and turbulent in the energy dissipation cavity after impacting the water blocking front surface. This makes the mutual collision and mixing of the water flow more intense, increasing the opportunity for energy exchange. The originally more dispersed water flow energy can be more concentrated in the internal friction, impact and other energy conversion processes in this process, thereby greatly improving the collision energy dissipation efficiency.

[0058] The above specific embodiments further illustrate the purpose, technical scheme and advantages of the utility model, and it should be understood that the above description is only a specific embodiment of the utility model, and is not used to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A collision energy dissipation device with an outlet steel ring, characterized in that, The energy dissipation component includes a diversion and energy dissipation component for water in a water supply pipe (13). The energy dissipation component includes a flow guide seat (14) and a pipe diversion cone (9). The flow guide seat (14) is coaxial with the water supply pipe (13) and spaced apart, forming an annular water confluence outlet (8) at the interval. The pipe diversion cone (9) forms a return flow channel structure with the flow guide seat (14) and the water supply pipe (13) respectively. After the water is dissipated by collision through the return flow channel structure, it is injected from the water confluence outlet (8) into the energy dissipation cavity formed by the water blocking component (2) and the flow guide component (6). The energy dissipation cavity is connected to the external still water.

2. The collision energy dissipation device with an outlet steel ring according to claim 1, characterized in that, The water-blocking component (2) and the flow-guiding component (6) are respectively connected to both sides of the outer wall of the water confluence outlet (8); The side wall of the water-blocking component has a protruding structure extending toward the flow-guiding component (6). The wall of the protruding structure facing the water confluence outlet (8) forms a water-blocking front (4) for offsetting the jet. The water-blocking front (4) and the side wall of the flow-guiding component (6) form the energy-dissipating cavity.

3. The collision energy dissipation device with an outlet steel ring according to claim 2, characterized in that, The extension length of the water-blocking front (4) is equal to or greater than the width of the water confluence outlet (8).

4. The collision energy dissipation device with an outlet steel ring according to claim 2, characterized in that, The sidewall of the flow guiding component (6) is a flow guiding surface (7) with an inclined angle.

5. A collision energy dissipation device with an outlet steel ring according to claim 4, characterized in that, The tilt angle of the guide surface (7) is in the range of 30° to 90°.

6. A collision energy dissipation device with an outlet steel ring according to claim 2, characterized in that, The protruding structure forms a backwater (3) on the wall facing away from the water body confluence outlet (8) to support the front water barrier (4). The backwater (3) is inclined and connected to the front water barrier (4) through a water barrier transition surface (5).

7. A collision energy dissipation device with an outlet steel ring according to any one of claims 1-6, characterized in that, A second flow channel (12) is formed between the front section of the pipeline water-dividing cone (9) and the water conveying pipe (13) for diverting part of the water body. A first flow channel (10) is formed between the middle section of the pipeline water-dividing cone (9) and the rear-mounted flow guide seat (14) for diverting another part of the water body. The two parts of the water body collide at the water body confluence outlet (8) through different flow channels.

8. A collision energy dissipation device with an outlet steel ring according to claim 7, characterized in that, The energy dissipation component also includes an inner water-dividing cone (11) located in the middle of the first flow channel (10), one end of the inner water-dividing cone (11) is connected to the flow guide seat (14), and the other end of the inner water-dividing cone (11) extends toward the water supply pipe (13).

9. A collision energy dissipation device with an outlet steel ring according to claim 7, characterized in that, The radial cross-sectional areas of the first flow channel (10) and the second flow channel (12) at the water inlet are equal, both being half the radial cross-sectional area of ​​the water conveying pipe (13).

10. A collision energy dissipation device with an outlet steel ring according to claim 8, characterized in that, Multiple connecting plates are connected between the internal water distribution cone (11) and the pipeline water distribution cone (9), and between the pipeline water distribution cone (9) and the water supply pipeline (13).

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