Ecological flow discharge hole arrangement structure combined with sand flushing gallery
By combining the ecological flow discharge hole layout structure of the sand-pulling corridor, the problem of difficulty in laying down ecological flow facilities for dam construction in narrow rivers in hydropower projects is solved, and the adaptability and simplification of ecological flow discharge in hydropower projects is achieved. , reducing engineering investment and interference.
Patent Information
- Application Number
- CN202323469172.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-19
- Publication Date
- 2024-12-06
- Estimated Expiration
- 2033-12-19
AI Technical Summary
In hydropower projects, the construction of a dam in a narrow river channel has made it difficult to arrange the first hub discharge ecological flow facilities and the project investment is large. Especially during the dry season and during the maintenance of generator sets, special ecological flow discharge facilities are needed, which have fewer usage time and opportunities, and Low startup frequency under extreme conditions.
Design an ecological flow discharge hole layout structure combining sand blasting corridors, including the water barrier section, factory diversion dam section, bottom hole dam section and sand blasting corridor main pipe. The ecological flow discharge hole is connected to the sand blasting corridor main pipe , through the composition of ecological flow discharge hole branch pipes, the duplication of the main pipe and opening and closing equipment is reduced, and the porous characteristics of the sand-flushing corridor are simplified.
The adaptability of ecological flow discharge in hydropower projects in narrow valley locations has been achieved, the project investment and interference has been reduced, the facility layout has been simplified, and the specialization and flexibility of ecological flow discharge has been ensured.
Smart Images
Figure CN222120144U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of water conservancy and hydropower engineering, and in particular to an ecological flow discharge hole arrangement structure combined with a sand flushing corridor, which is suitable for the arrangement of ecological flow discharge facilities of a head hub. Background Art
[0002] In order to build a reservoir and store water on the river, hydropower projects need to build a dam on the river and cut off the water flow. However, in order to ensure the water flow required by the ecological environment of the river downstream of the dam, it is necessary to continuously discharge the ecological flow to the downstream river through the discharge facilities arranged on the dam. The flood flow discharged through the flood discharge building during the flood season can meet the ecological flow requirements, and the tailwater flow of the unit power generation during the non-flood season can also meet the ecological flow requirements. However, in the dry season and when the generator unit is under maintenance at the same time, it is necessary to activate the dedicated ecological flow discharge facility to discharge the ecological flow. In order to save project investment, hydropower projects usually use narrow river channels to build dams. Due to spatial conditions, the hub layout is relatively compact. It is relatively difficult to arrange a dedicated ecological flow discharge building alone, and the project investment is relatively large. At the same time, considering that the dedicated ecological flow discharge facility is mainly started under extreme conditions, there are fewer time periods and opportunities for use. Utility Model Content
[0003] In order to solve the above problems, the utility model provides an ecological flow discharge hole arrangement structure combined with a sand flushing corridor, aiming to solve the problem of ecological flow discharge in the head hub of water conservancy and hydropower engineering projects by designing a special ecological flow discharge facility which is technically feasible, simple in arrangement and has low engineering investment.
[0004] The utility model is realized through the following technical solutions.
[0005] An ecological flow discharge hole arrangement structure combined with a sand flushing corridor comprises a retaining dam section, a powerhouse water diversion dam section and a bottom hole dam section which are arranged in sequence; a sand flushing corridor main pipe is arranged from the powerhouse water diversion dam section to the bottom hole dam section; a sand flushing corridor inlet is arranged in the powerhouse water diversion dam section, the sand flushing corridor inlet is connected with the sand flushing corridor main pipe; an energy dissipation pool is provided downstream of the bottom hole dam section; an outlet of the sand flushing corridor main pipe leads to the energy dissipation pool; the inlet of the sand flushing corridor main pipe extends to the retaining dam section; an ecological flow discharge hole is arranged in the retaining dam section, and the ecological flow discharge hole is connected with the sand flushing corridor main pipe.
[0006] Furthermore, the inlet bottom elevation of the ecological flow discharge hole should be lower than the dead water level.
[0007] Furthermore, the inlet elevation of the ecological flow discharge hole is higher than the inlet elevation of the sand flushing corridor. The ecological flow discharge hole is connected to the sand flushing corridor main pipe through the ecological flow discharge hole branch pipe. The ecological flow discharge hole branch pipe is composed of a horizontal section, an upper bend section, a vertical section, and a lower bend section connected in sequence. The end of the lower bend section is connected to the sand flushing corridor main pipe.
[0008] Furthermore, the entrance of the sand flushing corridor is connected to the sand flushing corridor main pipe through the sand flushing corridor branch pipe. The sand flushing corridor main pipe and the sand flushing corridor branch pipe are arranged at the same elevation. The sand flushing corridor branch pipe consists of a horizontal section and a turning section. The end of the turning section is connected to the sand flushing corridor main pipe.
[0009] Furthermore, a flood discharge bottom hole is arranged in the bottom hole dam section, which directly leads to the energy dissipation pool. A power generation water inlet, a generator set and a tailwater channel are arranged in the plant water diversion dam section. Water flows through the generator set to generate electricity and then is discharged into the tailwater channel.
[0010] The beneficial effects of the utility model are as follows: the structure proposed by the utility model utilizes the "multi-hole integration" layout feature of the sand flushing corridor, and an ecological flow discharge hole is arranged in the dam section. The ecological flow discharge hole is connected to the sand flushing corridor main pipe, with a simple layout and less interference. While ensuring that the ecological flow discharge hole has the special discharge function, it can also reduce the duplication of main pipes and opening and closing equipment, and has strong adaptability to hydropower projects built in narrow river valleys. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a plan view of the utility model.
[0012] Figure 2 It is a structural schematic diagram of the ecological flow discharge hole branch pipe of the utility model.
[0013] Figure 3 It is an elevation view of the utility model.
[0014] In the figure: retaining dam section 11, powerhouse diversion dam section 12, bottom hole dam section 13, sand flushing gallery main pipe 14, sand flushing gallery inlet 15, sand flushing gallery branch pipe 16, energy dissipation pool 17, ecological flow discharge hole 18, ecological flow discharge hole branch pipe 19, horizontal section 191, upper bend section 192, vertical section 193, lower bend section 194, gantry hoist 20, flood discharge bottom hole 21, power generation water inlet 22, generator set 23, tailwater channel 24. DETAILED DESCRIPTION
[0015] The following is a further description of the structures involved in the present invention or the technical terms used. These descriptions are merely examples of how the present invention is implemented and do not constitute any limitation to the present invention.
[0016] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left" and "right" indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the positions or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0017] In the description of the present invention, unless otherwise clearly specified and limited, "connection", "fixation" and the like should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0018] like Figure 1-3 As shown, an ecological flow discharge hole arrangement structure combined with a sand flushing corridor comprises a retaining dam section 11, a powerhouse water diversion dam section 12, and a bottom hole dam section 13 arranged in sequence, a sand flushing corridor main pipe 14 is arranged from the powerhouse water diversion dam section 12 to the bottom hole dam section 13, a sand flushing corridor inlet 15 is arranged in the powerhouse water diversion dam section 12, and the sand flushing corridor inlet 15 is connected to the sand flushing corridor main pipe 14, an energy dissipation pool 17 is provided downstream of the bottom hole dam section 13, and the outlet of the sand flushing corridor main pipe 14 leads to the energy dissipation pool 17, and the sand flushing corridor main pipe inlet extends to the retaining dam section 11, and an ecological flow discharge hole 18 is arranged in the retaining dam section 11, and the ecological flow discharge hole 18 is connected to the sand flushing corridor main pipe 14.
[0019] As an optional embodiment, the inlet bottom elevation of the ecological flow discharge hole 18 is lower than the dead water level. The size of the inlet orifice is determined by hydraulic calculation according to the ecological flow to be discharged and the reservoir water level elevation.
[0020] As an optional embodiment, the inlet elevation of the ecological flow discharge hole 18 is higher than the inlet elevation of the sand flushing corridor. The ecological flow discharge hole 18 is connected to the sand flushing corridor main pipe 14 through the ecological flow discharge hole branch pipe 19. The ecological flow discharge hole branch pipe 19 adopts the arrangement of "horizontal section 191→upward bend section 192→vertical section 193→downward bend section 194". The end of the downward bend section 194 is connected to the sand flushing corridor main pipe 14, see Figure 2 .
[0021] As an optional embodiment, the sand flushing corridor inlet 15 is connected to the sand flushing corridor main pipe 14 through the sand flushing corridor branch pipe 16. The sand flushing corridor main pipe 14 and the sand flushing corridor branch pipe 16 are arranged at the same elevation. The sand flushing corridor branch pipe 16 consists of a horizontal section and a turning section, and the end of the turning section is connected to the sand flushing corridor main pipe 14.
[0022] As an optional embodiment, since the main pipe and branch pipe bodies of the sand flushing corridor and the branch pipe 19 of the ecological flow discharge hole are all buried in the dam body, considering the inconvenience of maintenance during operation, steel plate lining is adopted.
[0023] As an optional embodiment, Figure 1 As shown, the bottom hole dam section 13 is provided with a flood discharge bottom hole 21, which is directly connected to the energy dissipation pool 17. The power generation water inlet 22, the generator set 23 and the tailwater channel 24 are arranged in the powerhouse diversion dam section 12. The water flows through the generator set 23 to generate electricity and then is discharged to the downstream tailwater channel 24. The outlet of the sand flushing corridor main pipe 14 is arranged in the flood discharge bottom hole 21 dam section, and the water flows into the energy dissipation pool 17 at the outlet of the flood discharge bottom hole 21 to avoid the duplication of energy dissipation facilities. When the hydropower project is discharging floods, generating electricity or flushing sand, the ecological flow discharge hole may not be activated. However, under extreme conditions where the flood discharge facilities, generator sets and sand discharge corridors are not in operation, the ecological flow discharge hole 18 can be activated alone, and the water flows through the sand flushing corridor main pipe 14 to the energy dissipation pool 17 downstream of the dam.
[0024] As an optional embodiment, Figure 3 As shown, a gate-type hoist 20 is provided on the ecological flow discharge hole 18 to open and close the ecological flow discharge hole 18. The gate opening and closing equipment of the ecological flow discharge hole 18 can be shared with the gate opening and closing equipment of the sand flushing corridor inlet 15 and the power generation water diversion inlet 22 to avoid duplication of construction.
[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. An ecological flow discharge hole arrangement structure combined with a sand flushing corridor, comprising a retaining dam section (11), a powerhouse water diversion dam section (12), and a bottom hole dam section (13) arranged in sequence, a sand flushing corridor main pipe (14) is arranged from the powerhouse water diversion dam section (12) to the bottom hole dam section (13), a sand flushing corridor inlet (15) is arranged in the powerhouse water diversion dam section (12), the sand flushing corridor inlet (15) is connected to the sand flushing corridor main pipe (14), an energy dissipation pool (17) is arranged downstream of the bottom hole dam section (13), and an outlet of the sand flushing corridor main pipe (14) leads to the energy dissipation pool (17), Features: The inlet of the sand flushing corridor main pipe (14) extends into the water retaining dam section (11), and an ecological flow discharge hole (18) is arranged in the water retaining dam section (11), and the ecological flow discharge hole (18) is connected to the sand flushing corridor main pipe (14).
2. The arrangement structure of ecological flow discharge holes combined with sand flushing corridor according to claim 1, Features: The inlet bottom elevation of the ecological flow discharge hole (18) should be lower than the dead water level.
3. The arrangement structure of ecological flow discharge holes combined with sand flushing corridor according to claim 1, Features: The inlet elevation of the ecological flow discharge hole (18) is higher than the inlet elevation of the sand flushing corridor (15). The ecological flow discharge hole (18) is connected to the sand flushing corridor main pipe (14) through the ecological flow discharge hole branch pipe (19). The ecological flow discharge hole branch pipe (19) is composed of a horizontal section (191), an upper curved section (192), a vertical section (193), and a lower curved section (194) connected in sequence. The end of the lower curved section (194) is connected to the sand flushing corridor main pipe (14).
4. The arrangement structure of ecological flow discharge holes combined with a sand flushing corridor according to claim 1, Features: The sand flushing corridor inlet (15) is connected to the sand flushing corridor main pipe (14) through the sand flushing corridor branch pipe (16). The sand flushing corridor main pipe (14) and the sand flushing corridor branch pipe (16) are arranged at the same elevation. The sand flushing corridor branch pipe (16) consists of a horizontal section and a turning section. The end of the turning section is connected to the sand flushing corridor main pipe (14).
5. The arrangement structure of ecological flow discharge holes combined with sand flushing corridor according to claim 1, Features: A flood discharge bottom hole (21) is arranged in the bottom hole dam section (13) and is directly connected to the energy dissipation pool (17). A power generation water inlet (22), a generator set (23) and a tailwater channel (24) are arranged in the powerhouse water diversion dam section (12). Water flows through the generator set (23) to generate electricity and then is discharged to the tailwater channel (24).