Energy dissipation and flow stabilization structure for pressure pipeline outlet

Abstract

The invention provides an energy dissipation and flow stabilization structure for a pressure pipeline outlet, and belongs to the technical field of water conservancy projects. The energy dissipation and flow stabilization structure comprises an outlet valve chamber, an energy dissipation unit and a water outlet unit which are sequentially connected. Wherein a water outlet pipeline is arranged in the outlet valve chamber, one end of the water outlet pipeline is detachably connected with the pressure pipeline, and the other end of the water outlet pipeline is connected with the energy dissipation unit; a flow and pressure regulating valve is arranged on the water outlet pipeline; the primary energy dissipation device is used for carrying out primary energy dissipation treatment on flowing water entering the water outlet pipeline; the energy dissipation unit is used for carrying out energy dissipation treatment on the flowing water introduced through the water outlet pipeline again; and the water outlet unit is used for discharging flowing water after energy dissipation of the energy dissipation unit. The energy dissipation and flow stabilization structure has the effect of improving energy dissipation and flow stabilization of flowing water at an outlet of the pressure pipeline.

Description

Technical Field

[0001] The present disclosure relates to the technical field of water conservancy engineering, and in particular to an energy dissipation and flow stabilization structure for a pressure pipe outlet. Background Art

[0002] In the water supply system of a hydraulic project, energy dissipation and flow stabilization at the outlet of the pressure pipe is a key technical link to ensure the safe and stable operation of the project. In typical scenarios such as reservoir discharge pipes and large-drop water supply pipelines, due to the large water level difference between the inlet and outlet of the pipe and the short length of the pipe, it is difficult for the flowing water to fully dissipate energy through friction inside the pipe, resulting in a large amount of kinetic energy at the outlet of the pressure pipe. With the expansion of the scale of modern water conservancy projects, the amount of water carried by the pressure pipe has increased significantly. If the huge kinetic energy carried by the high-speed water at the outlet cannot be effectively eliminated, it will cause two hazards: first, it will cause serious scouring and damage to downstream facilities; second, it may cause problems such as water pulsation and structural vibration, threatening the structural safety of the entire pipeline system.

[0003] Currently, pressure pipeline outlet energy dissipation technology faces numerous challenges. Traditional energy dissipation facilities have limited efficiency and are unable to meet the energy dissipation requirements of high-flow, high-velocity conditions. High-speed water often forms concentrated jets in the energy dissipation area, strongly scouring the bottom and inner walls of the energy dissipation well, leading to premature structural damage. In some energy dissipation structures, due to improper structural design and inadequate consideration of the optimized flow pattern, the hydraulic jump is unstable, and water turbulence and momentum exchange are insufficient. This prevents the efficient conversion of kinetic energy into heat and turbulent energy, significantly reducing the energy dissipation effect. This not only causes overflows and wastes water resources, but also exacerbates structural performance degradation, accumulates safety hazards, and may even lead to major accidents. Furthermore, due to the cavitation and scouring effects of the water, existing energy dissipation structures lack erosion resistance, making them prone to structural damage after long-term operation, increasing maintenance costs and safety risks.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the Invention

[0005] The purpose of the present disclosure is to overcome the above-mentioned deficiencies of the prior art and provide an energy dissipation and flow stabilization structure for a pressure pipe outlet, thereby improving the energy dissipation and flow stabilization effect of the pressure pipe outlet and increasing the service life of the energy dissipation and flow stabilization structure, thereby reducing its maintenance cost.

[0006] According to one aspect of the present disclosure, there is provided an energy dissipation and flow stabilization structure for a pressure pipe outlet, the energy dissipation and flow stabilization structure comprising an outlet valve chamber, an energy dissipation unit, and a water outlet unit connected in sequence;

[0007] Wherein, the outlet valve chamber is provided with a water outlet pipe, one end of the water outlet pipe is detachably connected to the pressure pipe, and the other end is connected to the energy dissipation unit;

[0008] The outlet pipe is provided with a flow regulating and pressure regulating valve; the flow regulating and pressure regulating valve is used to perform initial energy dissipation treatment on the water entering the outlet pipe;

[0009] The energy dissipation unit is used to perform energy dissipation treatment on the flowing water entering through the water outlet pipe;

[0010] The water outlet unit is used to discharge the flowing water after the energy dissipation unit dissipates energy.

[0011] According to one embodiment of the present disclosure, the energy dissipation unit includes a stilling pool and at least one energy dissipation cone;

[0012] The stilling pool is connected to the outlet valve chamber, and one end of the outlet pipe away from the pressure pipe extends into the stilling pool;

[0013] At least one energy dissipation cone is arranged in the stilling pool.

[0014] According to one embodiment of the present disclosure, along the flow direction of the water in the stilling pool, the length of the stilling pool is 4 to 6 times the diameter of the outlet pipe;

[0015] The depth of the stilling pool is 3.5 to 6.0 times the diameter of the outlet pipe;

[0016] The distance between the end of the outlet pipe away from the pressure pipe and the bottom of the stilling pool is 1.5 to 3.0 times the diameter of the outlet pipe.

[0017] According to one embodiment of the present disclosure, the stilling basin has an outlet section;

[0018] Along the flow direction of the water in the stilling basin, the length of the outlet section is 1.5 to 2.0 times the diameter of the outlet pipe.

[0019] According to one embodiment of the present disclosure, the stilling basin has a bottom plate, a first side wall and a second side wall;

[0020] The thickness of the bottom plate and the first side wall is 0.8 to 1.2 times the diameter of the water outlet pipe, and the thickness of the bottom plate and the first side wall is not less than 1.0m;

[0021] The thickness of the second side wall is 0.5 to 1.0 times the diameter of the water outlet pipe, and the thickness of the second side wall is not less than 0.6m.

[0022] According to one embodiment of the present disclosure, the energy dissipation and flow stabilization structure further includes a protective layer;

[0023] The protective layer is arranged on the inner wall of the stilling pool and the outer surface of the energy dissipation cone, wherein the thickness of the protective layer is between 1.0 and 1.5 cm.

[0024] According to one embodiment of the present disclosure, the water outlet unit includes a water outlet pool;

[0025] The water outlet pool is connected to the outlet section, and the connection between the water outlet pool and the outlet section has an arc chamfer.

[0026] According to an embodiment of the present disclosure, the energy dissipation and flow stabilization structure further includes a stabilizing block;

[0027] The stabilizing block is provided with an installation channel, and the water outlet pipe is arranged in the installation channel;

[0028] The water outlet pool has a water outlet side wall;

[0029] The stabilizing block is integrated with the water outlet side wall.

[0030] According to one embodiment of the present disclosure, the depth of the outlet pool is 2 to 3 times the diameter of the outlet pipe;

[0031] The distance of the water outlet pool in the first direction is 2 to 4 times the diameter of the water outlet pipe, and the distance of the water outlet pool in the second direction is 2 to 5 times the diameter of the water outlet pipe.

[0032] According to an embodiment of the present disclosure, the water outlet pool is symmetrically provided with water outlet side walls along the water outlet direction of the water outlet pool;

[0033] The height of the water outlet side wall is the same as that of the first side wall, and the thickness of the water outlet side wall is smaller than that of the first side wall.

[0034] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0036] Figure 1 It is a cross-sectional schematic diagram of an energy dissipation and flow stabilization structure in one embodiment of the present disclosure.

[0037] Figure 2This is a top view of an energy dissipation and flow stabilization structure in one embodiment of the present disclosure.

[0038] Figure 3 for Figure 1 Cross-sectional view along the AA axis.

[0039] Figure 4 for Figure 1 Cross-sectional view along the BB direction.

[0040] Figure 5 for Figure 1 Cross-sectional view along CC direction.

[0041] Description of reference numerals:

[0042] 1. Outlet valve chamber; 11. Outlet pipe; 111. Flow and pressure regulating valve; 12. Force transmission expansion joint; 2. Energy dissipation unit; 21. Energy dissipation pool; 211. Outlet section; 212. Bottom plate; 213. First side wall; 214. Second side wall; 22. Energy dissipation cone; 3. Outlet unit; 31. Outlet pool; 311. Outlet side wall; 4. Protective layer; 5. Stabilizing block; 51. Installation channel; 6. Pressure pipe; 7. Water diversion channel; A1. First direction; A2. Second direction. DETAILED DESCRIPTION

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent identical or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the figures are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0044] Although relative terms such as "upper" and "lower" are used in this specification to describe the relationship of one illustrated component to another, these terms are used herein for convenience only, such as in accordance with the orientation of the illustrations in the accompanying drawings. It will be understood that if the illustrated device were flipped upside down, the component described as "upper" would become the component "lower." When a structure is referred to as "on" another structure, this may mean that the structure is integrally formed with the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via the other structure.

[0045] Among the related technologies, the energy dissipation technology at the outlet of the pressure pipeline faces many challenges. For example, the energy dissipation efficiency of some energy dissipation facilities is limited, and it is difficult to meet the energy dissipation requirements under large flow and high flow velocity conditions. High-speed water often forms concentrated jets in the energy dissipation area, which strongly scours the bottom and inner wall of the energy dissipation well, causing premature damage to the structure; some other energy dissipation facilities have unreasonable structural designs, fail to fully consider the optimization of the flow state of the water, the water jump morphology is unstable, the water turbulence and momentum exchange are insufficient, making it impossible to efficiently convert kinetic energy into heat energy and turbulent energy, and the energy dissipation effect is greatly reduced, which not only causes water overflow and wastes water resources, but also aggravates the degradation of structural performance, accumulates safety hazards, and may even lead to major accidents.

[0046] Based on this, see Figure 1 、 Figure 2 The embodiment of the present disclosure provides an energy dissipation and flow stabilization structure for the outlet of a pressure pipe, so as to improve the energy dissipation and flow stabilization effect of the outlet water of the pressure pipe 6. The energy dissipation and flow stabilization structure includes an outlet valve chamber 1, an energy dissipation unit 2 and a water outlet unit 3 connected in sequence; wherein, the outlet valve chamber 1 is provided with an outlet pipe 11, one end of the outlet pipe 11 is detachably connected to the pressure pipe 6, and the other end is connected to the energy dissipation unit 2; the outlet pipe 11 is provided with a flow regulating and pressure regulating valve 111; the flow regulating and pressure regulating valve 111 is used for performing initial energy dissipation treatment on the water entering the outlet pipe 11; the energy dissipation unit 2 is used for performing secondary energy dissipation treatment on the water entering through the outlet pipe 11; the water outlet unit 3 is used for discharging the water after the energy dissipation unit 2 has dissipated the water.

[0047] In the embodiment of the present disclosure, the flowing water flows out through the pressure pipe 6 and enters the outlet pipe 11. The outlet pipe 11 is provided with a flow regulating and pressure regulating valve 111. Under the action of the flow regulating and pressure regulating valve 111, the flowing water in the outlet pipe 11 is subjected to an initial energy dissipation treatment. The provided flow regulating and pressure regulating valve 111 can accurately adjust the outlet flow and reduce most of the kinetic energy of the flowing water to meet the flow control and energy reduction requirements under different working conditions. After the initial energy dissipation of the flowing water, the flowing water in the outlet pipe 11 enters the energy dissipation unit 2. Under the action of the energy dissipation unit 2, the flowing water is subjected to a second energy dissipation treatment. The flowing water after energy dissipation flows out of the energy dissipation unit 2 and enters the outlet unit 3. The flowing water flows out of the outlet unit 3 for subsequent use. The energy dissipation and flow stabilization structure provided in the present disclosure can improve the flow stabilization and energy dissipation effect of the flowing water by performing two energy dissipation treatments on the flowing water flowing out of the pressure pipe 6.

[0048] As an example, the pressure pipe 6 and the water outlet pipe 11 can be detachably connected via a force transmission expansion joint 12. The force transmission expansion joint 12 can balance the displacement and stress of the pipeline system caused by temperature changes, water hammer impact, etc. through flexible compensation and load transfer mechanisms, protect the safety, sealing and durability of the connection between the flow and pressure regulating valve 111 and the water outlet pipe 11, and provide disassembly space for maintenance of the flow and pressure regulating valve 111.

[0049] Furthermore, in this example, the sizes of the flow and pressure regulating valve 111 and the force transmission expansion joint 12 match the sizes of the pressure pipe 6 .

[0050] As another example, the diameter of the water outlet pipe 11 is adapted to the diameter of the pressure pipe 6 . Furthermore, the water outlet pipe 11 may be a steel pipe.

[0051] In some embodiments of the present disclosure, see Figure 1 、 Figure 2 The energy dissipation unit 2 includes a stilling pool 21 and at least one energy dissipation cone 22; the stilling pool 21 is connected to the outlet valve chamber 1, and the end of the outlet pipe 11 away from the pressure pipe 6 extends into the stilling pool 21; at least one energy dissipation cone 22 is arranged in the stilling pool 21. With this arrangement, the water in the pressure pipe 6 flows out through the outlet pipe 11 and enters the stilling pool 21. The water will come into contact with the energy dissipation cone 22 in the stilling pool 21, and form a diffusion or swirl flow under the guidance of the inner wall of the energy dissipation cone 22, causing the water to violently turbulent, collide and rub, and efficiently convert the concentrated kinetic energy into heat energy and turbulent energy. This design avoids the concentrated scouring of the well bottom by the water in the initial stage of pipeline discharge, and protects the structural safety of the stilling pool 21.

[0052] It can be understood that the outlet of the outlet pipe is arranged vertically in the energy dissipation pool 21. At the same time, the outlet of the outlet pipe can be below the water surface of the energy dissipation pool 21. The water cushion in the well is used to buffer the rapid water flowing out of the outlet pipe 11 to dissipate energy. At the same time, the rapid flow at the outlet of the outlet pipe 11 meets the slow flow in the well to form a submerged water jump. The kinetic energy is further dissipated through the strong turbulence, vortex mixing and momentum exchange in the water jump area, thereby achieving the effect of energy dissipation again.

[0053] Furthermore, it should be noted that in some embodiments of the present disclosure, the number of energy dissipation cones 22 is set to 1. Setting an energy dissipation cone 22 inside the stilling pool 21 can not only meet the steady flow energy dissipation of the flowing water, but also reduce the construction cost to a certain extent.

[0054] Of course, in other implementations, 2, 3, etc. can also be set.

[0055] As an example, the energy dissipation cone 22 may be made of a reinforced concrete structure.

[0056] As another example, the energy dissipation pool 21 may also be made of reinforced concrete, and the energy dissipation pool 21 and the energy dissipation cone 22 may be cast in one piece, thereby effectively improving the strength of the energy dissipation unit 2 and increasing the construction speed of the energy dissipation unit 2 .

[0057] In some examples, the energy dissipation cone 22 may be a cone, wherein the bottom diameter of the energy dissipation cone 22 may be twice the diameter of the outlet pipe 11 , and the ratio of the bottom diameter of the energy dissipation cone 22 to the cone height of the energy dissipation cone 22 may be 2.

[0058] Furthermore, the cone of the energy dissipation cone 22 may be spherical, which can improve the stress conditions of the energy dissipation cone 22 and enhance the energy dissipation effect on the flowing water.

[0059] In some embodiments of the present disclosure, see Figure 1 、 Figure 3 as well as Figure 4 The energy dissipation and flow stabilization structure may further include a protective layer 4 ; the protective layer 4 is arranged on the inner wall of the stilling pool 21 and the outer surface of the energy dissipation cone 22 .

[0060] In some embodiments of the present disclosure, the thickness of the protective layer 4 is between 1.0 and 1.5 cm. For example, the thickness of the protective layer 4 can be 1.0 cm, 1.1 cm, 1.2 cm, 1.3 cm, 1.4 cm or 1.5 cm. It should be noted that in other embodiments, the thickness of the protective layer 4 is not limited thereto. Specifically, the protective layer 4 can be an anti-wear steel plate, which can be welded to the grab bars reserved for the stilling basin 21 and the energy dissipation cone 22. In this embodiment, the protective layer 4 is set to an anti-wear steel plate, which has the ability to resist erosion such as cavitation and scouring, so that the erosion resistance of the stilling basin 21 and the energy dissipation cone 22 can be improved, thereby extending the service life of the building.

[0061] As an example, the energy dissipation and flow stabilization structure may further include a protective layer 4; the protective layer 4 is provided on the inner wall of the stilling pool 21 and the outer surface of the energy dissipation cone 22; the thickness of the protective layer 4 is between 1.0 and 1.5 cm.

[0062] In some embodiments of the present disclosure, see Figure 1 、 Figure 2 Along the flow direction of the water in the stilling basin 21, the length of the stilling basin 21 is 4 to 6 times the diameter of the outlet pipe 11. For example, the length of the stilling basin 21 can be 4, 5, or 6 times the diameter of the outlet pipe 11. It should be noted that in other embodiments, the ratio of the length of the stilling basin 21 to the diameter of the outlet pipe 11 is not limited to this.

[0063] In some embodiments of the present disclosure, the depth of the stilling pool 21 is 3.5 to 6.0 times the diameter of the outlet pipe 11. For example, the depth of the stilling pool 21 is 3.5 times, 4.0 times, 4.5 times, 5.0 times, 5.5 times, or 6.0 times the diameter of the outlet pipe 11. It should be noted that in other embodiments, the ratio of the depth of the stilling pool 21 to the diameter of the outlet pipe 11 is not limited to this.

[0064] In some embodiments of the present disclosure, see Figure 1 、 Figure 2 , the distance between the end of the outlet pipe 11 away from the pressure pipe 6 and the bottom of the stilling pool 21 is 1.5 to 3.0 times the diameter of the outlet pipe 11. For example, the distance between the end of the outlet pipe 11 away from the pressure pipe 6 and the bottom of the stilling pool 21 can be 1.5 times, 2.0 times, 2.5 times, or 3.0 times the diameter of the outlet pipe 11. It should be noted that in other embodiments, the ratio of the distance between the end of the outlet pipe 11 away from the pressure pipe 6 and the bottom of the stilling pool 21 to the diameter of the outlet pipe 11 is not limited to this.

[0065] As an example, along the flow direction of the water in the stilling pool 21, the length of the stilling pool 21 is 4 to 6 times the diameter of the outlet pipe 11; the depth of the stilling pool 21 is 3.5 to 6.0 times the diameter of the outlet pipe; the distance from the end of the outlet pipe 11 away from the pressure pipe 6 to the bottom of the stilling pool 21 is 1.5 to 3.0 times the diameter of the outlet pipe 11.

[0066] In some embodiments of the present disclosure, see Figure 1 、 Figure 2 The stilling basin 21 has an outlet section 211; along the flow direction of the flowing water in the stilling basin 21, the length of the outlet section 211 is 1.5 to 2.0 times the diameter of the outlet pipe 11. For example, the length of the outlet section 211 can be 1.5 times, 1.6 times, 1.7 times, 1.8 times, 1.9 times, and 2.0 times the diameter of the outlet pipe 11. By correlating the length of the outlet section 211 with the diameter of the outlet pipe 11, it is convenient for the flowing water to enter the outlet unit 3 in the stilling basin 21 after the energy dissipation treatment of the flowing water is completed, so as to facilitate the subsequent use of the flowing water.

[0067] In some embodiments of the present disclosure, see Figure 1 、 Figure 2 、 Figure 3 ,、 Figure 4 The stilling pool 21 has a bottom plate 212 and a first side wall 213; the thickness of the bottom plate 212 and the first side wall 213 are both 0.8 to 1.2 times the diameter of the outlet pipe 11, and the thickness of the bottom plate 212 and the first side wall 213 are not less than 1.0 m. For example, the thickness of the bottom plate 212 and the first side wall 213 can be 0.8 times, 1.0 times, or 1.2 times the diameter of the outlet pipe 11. It should be noted that in other embodiments, the ratio of the thickness of the bottom plate 212 and the first side wall 213 to the diameter of the outlet pipe 11 is not limited to this.

[0068] In some embodiments of the present disclosure, the thickness of the second sidewall 214 is 0.5 to 1.0 times the diameter of the water outlet pipe 11, and the thickness of the second sidewall 214 is not less than 0.6 m. For example, the thickness of the second sidewall 214 is 0.5, 0.6, 0.7, 0.8, 0.9, or 1.0 times the diameter of the water outlet pipe 11. It should be noted that in other embodiments, the ratio of the thickness of the second sidewall 214 to the diameter of the water outlet pipe 11 is not limited to this.

[0069] As an example, the energy dissipation pool 21 has a bottom plate 212, a first side wall 213 and a second side wall 214; the thickness of the bottom plate 212 and the first side wall 213 are both 0.8 to 1.2 times the diameter of the outlet pipe 11, and the thickness of the bottom plate 212 and the first side wall 213 are both not less than 1.0 m; the thickness of the second side wall 214 is 0.5 to 1.0 times the diameter of the outlet pipe 11, and the thickness of the second side wall 214 is not less than 0.6 m.

[0070] In some embodiments of the present disclosure, the water outlet unit 3 includes a water outlet pool 31; the water outlet pool 31 is connected to the outlet section 211, and the connection between the water outlet pool 31 and the outlet section 211 has a curved chamfer. By providing a curved chamfer at the connection between the water outlet pool 31 and the outlet section 211, water flow separation and vortexes caused by right-angle mutations can be eliminated, effectively improving the flow pattern of the outlet water flow and enhancing the flow smoothness.

[0071] Further, in some embodiments, see Figure 1 、 Figure 2 The end of the outlet pool 31 away from the stilling pool 21 can be connected to the water diversion channel 7, so as to ensure that the flowing water enters the subsequent water diversion system through the water diversion channel 7 to avoid scouring the downstream facilities caused by the flowing water.

[0072] In some embodiments of the present disclosure, the depth of the water outlet pool 31 is 2.0 to 3.0 times the diameter of the water outlet pipe 11. For example, the depth of the water outlet pool 31 is 2.0 times, 2.5 times, or 3.0 times the diameter of the water outlet pipe 11. It should be noted that in other embodiments, the ratio between the depth of the water outlet pool 31 and the diameter of the water outlet pipe 11 is not limited to this.

[0073] In some embodiments of the present disclosure, see Figure 2, the distance of the water outlet pool 31 in the first direction A1 is 2 to 4 times the diameter of the water outlet pipe 11. It can be understood that the first direction A1 is the width direction of the water outlet pool 31. Specifically, the width of the water outlet pool 31 is 2.0 to 4.0 times the diameter of the water outlet pipe 11. For example, the width of the water outlet pool 31 is 2.0 times, 2.5 times, 3.0 times, 3.5 times or 4.0 times the diameter of the water outlet pipe 11. It should be noted that in other embodiments, the ratio between the width of the water outlet pool 31 and the diameter of the water outlet pipe 11 is not limited to this.

[0074] In some embodiments of the present disclosure, the distance in the second direction A2 is 2 to 5 times the diameter of the water outlet pipe 11. It will be understood that the second direction A2 is the length direction of the water outlet pool 31. Specifically, the length of the water outlet pool 31 is 2.0 to 5.0 times the diameter of the water outlet pipe 11. For example, the width of the water outlet pool 31 is 2.0 times, 2.5 times, 3.0 times, 3.5 times, 4.0 times, 4.5 times, or 5.0 times the diameter of the water outlet pipe 11. It should be noted that in other embodiments, the ratio between the length of the water outlet pool 31 and the diameter of the water outlet pipe 11 is not limited to this.

[0075] As an example, the water outlet pool 31 may be a reinforced concrete structure.

[0076] In some embodiments of the present disclosure, see Figure 1 、 Figure 2 、 Figure 5 , along the water outlet direction of the water outlet pool 31, the water outlet pool 31 is symmetrically provided with water outlet side walls 311; wherein, the height of the water outlet side walls 311 is the same as the height of the first side wall 213, and the thickness of the water outlet side walls 311 is less than the thickness of the first side wall 213.

[0077] In some embodiments of the present disclosure, the bottom wall thickness of the water outlet pool 31 is consistent with the thickness of the water outlet side wall 311, and the bottom wall thickness of the water outlet pool 31 and the thickness of the water outlet side wall 311 are both not less than 0.4m.

[0078] As another example, see Figure 2 , the width of the stilling pool 21 and the width of the outlet pool 31 can be the same.

[0079] In some embodiments of the present disclosure, see Figure 1 、 Figure 2 The energy dissipation and flow stabilization structure also includes a stabilization block 5 having a mounting channel 51, within which the outlet pipe 11 is disposed. The outlet pool 31 has an outlet sidewall 311, with the stabilization block 5 integrally formed with the outlet sidewall 311. The stabilization block 5 stabilizes the outlet pipe 11, preventing vibration damage caused by uneven force or state disturbances, thereby improving the operational stability of the energy dissipation and flow stabilization structure.

[0080] As an example, the thickness of the stabilizing block 5 is 0.5 to 1.0 times the diameter of the water outlet pipe 11. For example, the thickness of the stabilizing block 5 can be 0.5 times, 0.6 times, 0.7 times, 0.8 times, 0.9 times or 1.0 times the diameter of the water outlet pipe 11. It should be noted that in other embodiments, the ratio of the thickness of the stabilizing block 5 to the diameter of the water outlet pipe 11 is not limited to this.

[0081] As an example, the thickness of the stabilizing block 5 is not less than 0.5 m.

[0082] In summary, this application has but is not limited to the following beneficial effects:

[0083] 1. Efficient energy dissipation and precise flow control. The multi-stage energy dissipation design of the flow regulating and pressure regulating valve 111, combined with the stilling basin 21 and the energy dissipation cone 22, achieves efficient dissipation of the kinetic energy of high-speed water flow through water cushion buffering, submerged water jump, and swirl diffusion. This significantly improves energy dissipation efficiency and solves the problem of insufficient energy dissipation of traditional energy dissipation facilities under high flow and high velocity conditions.

[0084] 2. Flow stability and structural protection. The energy dissipation cone 22 guides the water flow into a diffuse or swirling flow pattern, preventing concentrated jets from scouring the bottom of the energy dissipation basin 21. The stabilizing block 5 secures the outlet pipe 11, preventing damage from vibration. The protective layer 4 enhances erosion resistance and effectively prevents cavitation and scouring, ensuring the long-term stability and durability of the energy dissipation structure.

[0085] 3. Functional integration and convenient maintenance. The force transmission expansion joint 12 combines stress compensation with convenient maintenance functions. The flow and pressure regulating valve 111 can be independently disassembled and maintained. The overall structural design takes into account functionality and convenient operation and maintenance, reducing project maintenance costs.

[0086] Through the collaborative optimization of multiple components, this application achieves precise flow regulation, efficient energy dissipation and structural safety protection at the outlet of the pressure pipe 6, significantly improving the stability and reliability of the water supply system of the water conservancy project, and has important engineering application value.

[0087] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

Claims

1. An energy dissipation and flow stabilization structure for a pressure pipe outlet, characterized in that: The energy dissipation and flow stabilization structure comprises an outlet valve chamber, an energy dissipation unit and a water outlet unit connected in sequence; Wherein, the outlet valve chamber is provided with a water outlet pipe, one end of the water outlet pipe is detachably connected to the pressure pipe, and the other end is connected to the energy dissipation unit; The outlet pipe is provided with a flow regulating and pressure regulating valve; the flow regulating and pressure regulating valve is used to perform initial energy dissipation treatment on the water entering the outlet pipe; The energy dissipation unit is used to perform energy dissipation treatment on the flowing water entering through the water outlet pipe; The water outlet unit is used to discharge the flowing water after the energy dissipation unit dissipates energy.

2. The energy dissipation and flow stabilization structure for a pressure pipe outlet according to claim 1, characterized in that: The energy dissipation unit includes a stilling pool and at least one energy dissipation cone; The stilling pool is connected to the outlet valve chamber, and one end of the outlet pipe away from the pressure pipe extends into the stilling pool; At least one energy dissipation cone is arranged in the stilling pool.

3. The energy dissipation and flow stabilization structure for a pressure pipe outlet according to claim 2, characterized in that: Along the flow direction of the water in the stilling pool, the length of the stilling pool is 4 to 6 times the diameter of the outlet pipe; The depth of the stilling pool is 3.5 to 6.0 times the diameter of the outlet pipe; The distance between the end of the outlet pipe away from the pressure pipe and the bottom of the stilling pool is 1.5 to 3.0 times the diameter of the outlet pipe.

4. The energy dissipation and flow stabilization structure for a pressure pipe outlet according to claim 2, characterized in that: The stilling basin has an outlet section; Along the flow direction of the water in the stilling basin, the length of the outlet section is 1.5 to 2.0 times the diameter of the outlet pipe.

5. The energy dissipation and flow stabilization structure for a pressure pipe outlet according to claim 4, characterized in that: The stilling basin comprises a bottom plate, a first side wall and a second side wall; The thickness of the bottom plate and the first side wall is 0.8 to 1.2 times the diameter of the water outlet pipe, and the thickness of the bottom plate and the first side wall is not less than 1.0m; The thickness of the second side wall is 0.5 to 1.0 times the diameter of the water outlet pipe, and the thickness of the second side wall is not less than 0.6m.

6. The energy dissipation and flow stabilization structure for a pressure pipe outlet according to claim 2, characterized in that: The energy dissipation and flow stabilization structure further includes a protective layer; The protective layer is arranged on the inner wall of the stilling pool and the outer surface of the energy dissipation cone, wherein the thickness of the protective layer is between 1.0 and 1.5 cm.

7. The energy dissipation and flow stabilization structure for a pressure pipe outlet according to claim 5, characterized in that: The water outlet unit includes a water outlet pool; The water outlet pool is connected to the outlet section, and the connection between the water outlet pool and the outlet section has an arc chamfer.

8. The energy dissipation and flow stabilization structure for a pressure pipe outlet according to claim 7, characterized in that: The energy dissipation and flow stabilization structure further includes a stabilizing block; The stabilizing block is provided with an installation channel, and the water outlet pipe is arranged in the installation channel; The water outlet pool has a water outlet side wall; The stabilizing block is integrated with the water outlet side wall.

9. The energy dissipation and flow stabilization structure for a pressure pipe outlet according to claim 7, characterized in that: The depth of the outlet pool is 2 to 3 times the diameter of the outlet pipe; The distance of the water outlet pool in the first direction is 2 to 4 times the diameter of the water outlet pipe, and the distance of the water outlet pool in the second direction is 2 to 5 times the diameter of the water outlet pipe.

10. The energy dissipation and flow stabilization structure for a pressure pipe outlet according to claim 7, characterized in that: Along the water outlet direction of the water outlet pool, the water outlet pool is symmetrically provided with water outlet side walls; The height of the water outlet side wall is the same as that of the first side wall, and the thickness of the water outlet side wall is smaller than that of the first side wall.

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