Water hammer control system of long-distance large-flow closed conduit water transfer project
By setting up a WES weir in the entire hole section of the outlet gate mechanism, the problem of damage to the culvert by water strike pressure is solved, and the effect of reducing maintenance work intensity and extending the project life is achieved.
Patent Information
- Application Number
- CN202422478734.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-10-14
AI Technical Summary
In the prior art, long-distance large-flow culvert water diversion projects are prone to damage to water stop, box structure and outlet gates under water hit pressure, with high maintenance work intensity, low water supply guarantee rate and short project service life.
A WES weir is set up in the full hole section of the outlet gate mechanism, located on the downstream side of the gate, and a chest wall upstream of the gate is arranged upstream of the water-watching side, forming an overflow channel on the backwater side. The structure and layout position of the WES weir are used to reduce the impact of water strike pressure on the culvert.
Effectively reduce the damage to the cryptor by water hitting pressure, reduce maintenance work intensity and costs, improve the water supply guarantee rate, and extend the project service life.
Smart Images
Figure CN223214524U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water diversion projects, in particular to a water hammer control system for a long-distance, large-flow underground channel water diversion project. Background Art
[0002] The objective existence of the imbalance between the uneven distribution of water resources and human water demand makes water transfer inevitable. The use of inter-basin water transfer methods to redistribute water resources and alleviate or even solve the urgent needs of water-scarce areas has become an effective measure for mankind to deal with this problem. In order to avoid secondary pollution of water quality during the water transfer process, underground channel water transfer has become the main way of water delivery. When diverting water and repairing underground channels, the project is required to have working holes, and the number of holes can be safely switched and fully closed. The conversion of the operating state of the pressurized underground channel is controlled by the downstream outlet gate. The structure of the outlet gate mechanism of the prior art is as follows: Figure 1 As shown, it includes a hoisting and shutting room 100, an outlet gate 200, and an inspection door slot 300, with breast walls in front and behind the outlet gate 200. With this structure, long-distance water diversion projects inevitably experience water hammer in the culvert. To prevent excessive water hammer pressure from damaging the culvert's waterstop, box structure, outlet gate, and other parts, reduce maintenance workload and costs, increase water delivery reliability, and extend the project's service life, it is necessary to propose a culvert water hammer control system to address the aforementioned technical issues. Utility Model Content
[0003] The purpose of the utility model is to overcome the shortcomings and defects of the existing technology and provide a water hammer control system for long-distance and large-flow culvert water diversion projects. An overflow system is added above the sluice to reduce the water hammer pressure in the culvert.
[0004] A water hammer control system for a long-distance, high-flow culvert water diversion project includes an outlet gate mechanism, which is composed of a culvert section, an outlet gate section, and a back pool section connected in sequence. A WES weir is provided in each full-hole section of the outlet gate section. The WES weir is located on the downstream side of a gate. A gate upstream breast wall is arranged upstream of the water-facing side of the WES weir. The gate is located between the gate upstream breast wall and the water-facing side of the WES weir. An overflow channel is formed on the backwater side of the WES weir.
[0005] The upstream breast wall of the gate is an L-shaped structure, and the water-facing side of the WES weir forms a symmetrical L-shaped surface. The upstream breast wall of the gate is an L-shaped upright structure, and the water-facing side of the WES weir forms a symmetrical upright L-shaped surface.
[0006] Among them, the WES weir is in the shape of a right-angled triangle as a whole, the water-facing side is a vertical surface, and the water-receiving side is composed of a curved weir surface segment, a straight line segment, and an anti-arc segment from top to bottom. The top of the water-facing side and the top of the water-receiving side are connected by a curved structure transition.
[0007] The backwater side of the WES weir is composed of a first inclined surface and a second inclined surface, and the dihedral angle between the first inclined surface and the second inclined surface is greater than 90 degrees.
[0008] The top of the breast wall upstream of the gate is lower than the top of the water-facing side of the WES weir, and the top surfaces are at the same height, so that the gate section forms a structure of a low breast wall on the upstream side.
[0009] The height positions of the breast wall upstream of the gate and the bottom surface of the WES weir are the same as the height position of the inner top surface of the inlet and outlet channel on the upstream side of the outlet gate section.
[0010] Among them, an upstream maintenance gate slot and a downstream maintenance gate slot are respectively arranged upstream and downstream of the WES weir.
[0011] Wherein, the WES weir is a solid structure or an internal hollow structure.
[0012] The outer side of the overflow channel formed on the backwater side of the WES weir is a slope structure.
[0013] Wherein, the WES weir is made of concrete and steel bars.
[0014] The utility model provides a WES weir in the full-hole section of the outlet gate section of the outlet gate mechanism, wherein the WES weir is located on the downstream side of the gate, an upstream breast wall of the gate is arranged upstream of the water-facing side of the WES weir, the gate is located between the upstream breast wall of the gate and the water-facing side of the WES weir, and an overflow channel is formed on the backwater side of the WES weir. The structure and arrangement position of the WES weir can be utilized to prevent excessive water hammer pressure from damaging the water stop, box structure, outlet gate and other parts of the culvert, thereby reducing the intensity and cost of maintenance work, increasing the water delivery guarantee rate, and extending the service life of the project. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a longitudinal cross-sectional diagram of a long-distance, large-flow culvert water diversion project under existing technology.
[0016] Figure 2 The utility model is a longitudinal sectional schematic diagram of a water hammer control system for a long-distance, large-flow underground channel water diversion project.
[0017] Figure 3 It is a schematic diagram of the specific structure of the WES weir in the utility model.
[0018] Figure 4 yes Figure 2 AA cross-sectional diagram of .
[0019] Figure 5 yes Figure 4 BB cross-section diagram. DETAILED DESCRIPTION
[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0021] See also Figure 2 and Figure 3 , Figure 4 As shown, a water hammer control system for a long-distance, high-flow culvert water diversion project includes an outlet gate mechanism, which is composed of a culvert section, an outlet gate section, and a back pool section connected in sequence. A WES weir 600 is provided in each of the full-hole sections of the outlet gate section. The WES weir is located downstream of a gate 200. An upstream breast wall 500 is arranged upstream of the water-facing side of the WES weir. The gate is located between the gate upstream breast wall and the water-facing side of the WES weir ( Figure 1 An overflow channel 110 is formed on the backwater side of the WES weir.
[0022] In this embodiment, the WES weir 600 forms the gate section's overflow system, employing a forward-flow discharge method. This system delivers high overflow volume and efficiency, effectively reducing water hammer pressure. This system eliminates the need to control gate closing speed during water outages, reducing the difficulty of gate opening and closing operations and increasing operational safety and reliability. Furthermore, the overflow system boasts a compact layout, simple structure, and low engineering cost, making it easy to deploy.
[0023] It should be noted that the elevation of the crest of the WES weir described in this application can be determined by combining the overflow volume, gate height, and the water level in the culvert after water outage. The upstream breast wall height is determined by the downstream channel water level during the culvert maintenance period.
[0024] In some embodiments, the breast wall 500 upstream of the gate is an L-shaped structure, and the water-facing side of the WES weir forms a symmetrical L-shaped surface. The gate is raised and lowered in the reserved space between the breast wall upstream of the gate and the water-facing side of the WES weir to achieve opening and closing control.
[0025] In some embodiments, the WES weir is in the shape of a right triangle, with the water-facing side 650 ( Figure 1 The right side shown in FIG is a vertical surface, and the back side is sequentially connected from top to bottom by the downstream curved weir surface segment 610, the straight line segment 620, and the reverse arc segment 630. The top of the water-facing side and the top of the back side are connected by a curved structure transition, that is, the top of the water-facing side is connected to the downstream curved weir surface segment 610 through the weir top upstream segment curved surface 660, as shown in FIG. Figure 3As shown, with the weir crest 640 as the coordinate center, the upstream section of the weir crest is a quarter elliptical curve, and the equation is: Downstream weir curve equation: H d For the design water head, X and Y are the horizontal and vertical axes of the coordinate system, a≈0.28-0.30, a / b≈0.87-3a, and a and b are the horizontal and vertical axis parameters of the curve.
[0026] In some embodiments, the backwater side of the WES weir is formed by connecting a first inclined surface and a second inclined surface, and the dihedral angle between the first inclined surface and the second inclined surface is greater than 90 degrees, and more preferably 120 degrees and less than 180 degrees.
[0027] In some embodiments, the top of the breast wall 500 upstream of the gate is lower than the top of the water-facing side of the WES weir 600, and the top surfaces are at the same height, so that the gate section forms a structure with a low breast wall on the upstream side, thereby eliminating the water blocking effect of the breast wall upstream of the gate. Combined with the breast wall downstream of the gate, the full-width WES weir is realized.
[0028] In some embodiments, the height of the breast wall upstream of the gate and the bottom surface of the WES weir is the same as the height of the inner top surface of the inlet and outlet channel upstream of the outlet gate section, such as Figure 1 shown.
[0029] In some embodiments, an upstream inspection gate slot 700 and a downstream inspection gate slot 800 are respectively arranged upstream and downstream of the WES weir, which are arranged on the inner side of the channel of the gate section and are rectangular slots for installing and guiding the inspection gate. In addition, the gate is installed in the gate slot 210, which is arranged on the inner side of the channel of the gate section and is also a rectangular slot.
[0030] In some embodiments, the WES weir is a solid structure or an internal hollow structure. When a hollow structure is adopted, a right-angled triangle can be formed inside the weir, such as Figure 1 shown.
[0031] In some embodiments, the outer side 130 corresponding to the overflow channel 110 formed on the backwater side of the WES weir is a sloped structure, the upper end of which is connected to the bottom of the corresponding side of the maintenance platform, and the lower end is connected to the platform 120 at the upper end of the downstream maintenance gate slot 800. The platform 120 is at the same height as the top plane 900 of the pool section above the rear pool section.
[0032] The WES weir 600 may be made of concrete and steel bars.
[0033] In an embodiment of the present application, the exit gate section is located above the hoisting and shutting machine room 100, which controls the exit gate 200 to be arranged in the gate slot 210. In an optional implementation scheme, the exit gate section has three hole sections, each hole section is equipped with an exit gate 200, and each hole section independently controls the water flow.
[0034] There is an inspection platform 400 below the hoisting and shutting machine room 100, with a railing on the outside of the inspection platform. Below the inspection platform 200 is the water flow channel and control structure of the outlet gate section.
[0035] In some embodiments, a ladder may be provided on one side of the maintenance platform. The ladder may be an upright steel ladder or other forms to facilitate entry and exit from the maintenance platform for equipment maintenance.
[0036] In the embodiment of the present application, the rear pool section has an outlet gate stilling pool, and the stilling pool has horizontally arranged hydraulic beams, which are arranged at intervals up and down and in front and right to dissipate energy and offset the impact of water on the downstream. The WES weir's rear waterfall energy dissipation combined with the stilling pool of the rear pool section of the outlet gate can effectively dissipate water energy.
[0037] The utility model provides a WES weir in the full-hole section of the outlet gate section of the outlet gate mechanism, wherein the WES weir is located on the downstream side of the gate, an upstream breast wall of the gate is arranged upstream of the water-facing side of the WES weir, the gate is located between the upstream breast wall of the gate and the water-facing side of the WES weir, and an overflow channel is formed on the backwater side of the WES weir. The structure and arrangement position of the WES weir can be utilized to prevent excessive water hammer pressure from damaging the water stop, box structure, outlet gate and other parts of the culvert, thereby reducing the intensity and cost of maintenance work, increasing the water delivery guarantee rate, and extending the service life of the project.
[0038] The utility model can be used for long-distance water diversion projects in inter-basin culverts, and can ensure the safety of the conversion of the operating state of the culvert. By adding an overflow system composed of a WES weir, the water hammer pressure generated thereby can be reduced to a safe range, thereby reducing the project cost and avoiding damage to the culvert caused by excessive water hammer pressure, thereby extending the service life of the culvert and reducing the maintenance cost of the culvert.
[0039] The basic principles, main features and advantages of the present invention are shown and described above. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention.
[0040] Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.
[0041] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
Claims
1. The water hammer control system for long-distance, large-flow culvert water diversion projects is characterized by: It includes an outlet gate mechanism, which is composed of a culvert section, an outlet gate section and a back pool section connected in sequence. A WES weir is provided in the full-hole section of the outlet gate section. The WES weir is located on the downstream side of the gate. A gate upstream breast wall is arranged upstream of the water-facing side of the WES weir. The gate is located between the gate upstream breast wall and the water-facing side of the WES weir. An overflow channel is formed on the backwater side of the WES weir.
2. The water hammer control system for a long-distance, large-flow underground channel water diversion project according to claim 1 is characterized in that: The breast wall upstream of the gate is an L-shaped upright structure, and the water-facing side of the WES weir forms a symmetrical upright L-shaped surface.
3. The water hammer control system for a long-distance, large-flow underground channel water diversion project according to claim 1 is characterized in that: The WES weir is in the shape of a right triangle as a whole, the water-facing side is a vertical surface, and the water-receiving side is composed of a curved weir surface segment, a straight line segment, and an anti-arc segment from top to bottom. The top of the water-facing side and the top of the water-receiving side are connected by a curved structure transition.
4. The water hammer control system for a long-distance, large-flow underground channel water diversion project according to claim 3 is characterized in that: The backwater side of the WES weir is formed by connecting a first inclined surface and a second inclined surface, and the dihedral angle between the first inclined surface and the second inclined surface is greater than 90 degrees.
5. The water hammer control system for a long-distance, large-flow underground channel water diversion project according to claim 1 is characterized in that: The top of the upstream breast wall of the gate is lower than the top of the waterfront side of the WES weir, while the bottom is at the same height, so that the gate section forms a structure of a low breast wall on the upstream side.
6. The water hammer control system for a long-distance, large-flow underground channel water diversion project according to claim 1 is characterized in that: The height positions of the breast wall upstream of the gate and the bottom surface of the WES weir are the same as the height position of the inner top surface of the inlet and outlet channel on the upstream side of the outlet gate section.
7. The water hammer control system for a long-distance, large-flow underground channel water diversion project according to claim 1 is characterized in that: An upstream inspection door slot and a downstream inspection door slot are respectively arranged upstream and downstream of the WES weir.
8. The water hammer control system for a long-distance, large-flow underground channel water diversion project according to claim 1 is characterized in that: The WES weir is a solid structure or an internal hollow structure.
9. The water hammer control system for a long-distance, large-flow underground channel water diversion project according to claim 1 is characterized in that: The outer side of the overflow channel formed on the backwater side of the WES weir is a slope structure.
10. The water hammer control system for a long-distance, large-flow underground channel water diversion project according to claim 1 is characterized in that: The WES weir is made of concrete and steel bars.