A drainage and flood discharge structure for water conservancy irrigation project

Abstract

This utility model belongs to the field of water conservancy engineering technology, specifically relating to a drainage and flood discharge structure for irrigation projects. It features an inlet transition section, followed by a mountain stream culvert, an open channel, and then a spillway gate. Below the spillway gate opening is the mountain stream culvert, followed by a spillway section, a spillway transition section, and an energy dissipation section. The spillway gate and the mountain stream culvert are arranged vertically, sharing an outlet spillway and energy dissipation section, unlike irrigation canal projects where the spillway gate and mountain stream culvert are typically arranged separately. This design optimizes the structure in narrow terrain, saves on engineering investment, meets the requirements for drainage, emptying, and maintenance of irrigation canals, and ensures that floodwaters from gullies can pass through the lower part of the open channel.

Description

Technical Field

[0001] The utility model belongs to the technical field of water conservancy projects, and in particular relates to a water conservancy irrigation project drainage and flood discharge structure. Background Art

[0002] Sluice gates and mountain stream culverts are currently widely used in water conservancy and irrigation projects in my country. When the irrigation channel crosses the gully due to topographical and geological conditions, a mountain stream culvert needs to be arranged at the bottom of the channel to drain the gully flood, and a sluice gate needs to be arranged at the same time to drain the water.

[0003] How to reasonably arrange sluice gates and mountain stream culverts in narrow terrain space so that they can not only meet the needs of irrigation channel drainage, emptying and maintenance, but also meet the needs of ensuring that gully floods can pass through the lower part of the channel when the channel crosses the gully, is an urgent problem that needs to be solved. Utility Model Content

[0004] In order to solve the defects of the above-mentioned prior art, the utility model proposes a drainage and flood discharge structure for a water conservancy irrigation project.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A drainage and flood discharge structure for a water conservancy irrigation project comprises a sluice unit and a mountain stream culvert unit arranged in a vertical direction, wherein the sluice unit is located above the mountain stream culvert unit, and water discharged from the irrigation channel passes through the sluice unit above, and flood water from the gully can pass through the mountain stream culvert unit, and a common chute section, a chute gradient section and an energy dissipation section are arranged at one end of the sluice unit and the mountain stream culvert unit.

[0007] In the preferred technical solution, the mountain stream culvert unit includes, in order according to the water flow direction: an inlet gradient section and a mountain stream culvert section, and the mountain stream culvert section is connected to a chute section, a chute gradient section and an energy dissipation section at the rear.

[0008] Furthermore, the inlet gradient section is composed of two side walls, with an opening at the top, the opening is facing the opposite direction of the water flow, and the channel width gradually decreases; the mountain stream culvert section is a rectangular channel surrounded by four side walls, with openings at both ends.

[0009] In the preferred technical solution, the sluice unit is arranged above the mountain stream culvert unit, and includes a forked inlet section and an open channel section in sequence according to the water flow direction, and the open channel section is connected to a chute section, a chute gradient section and an energy dissipation section.

[0010] Furthermore, the inlet section is composed of two forked inlets and an inlet connected to the open channel section. The open channel section is a channel opened on the top formed by two side walls, and its end is located above the chute section.

[0011] Furthermore, the chute section is a channel surrounded by two side walls, the cross-section of the two side walls is a right triangle, the right-angled sides are parallel to each other and face inward, forming an upper opening, a vertical rectangular channel; the chute gradient section is composed of two side walls, with an opening on the top, and the opening direction follows the flow direction of the water, and the channel gradually expands; the energy dissipation section is of equal diameter design and is connected to the maximum opening of the inlet gradient section.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0013] In general, compared with the prior art, the drainage and flood discharge structure of the water conservancy irrigation project provided by the utility model is vertically arranged with the sluice gate and the mountain stream culvert, and shares the outlet chute and energy dissipation section, which is different from the sluice gate and the mountain stream culvert of the irrigation channel project, which are generally arranged separately. This design can optimize the structure in narrow terrain, save engineering investment, meet the irrigation channel drainage, emptying and maintenance, and ensure that the flood of the gully can pass through the lower part of the channel open channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0015] Figure 1 It is the plan layout of the utility model;

[0016] Figure 2 It is a longitudinal sectional view of the utility model;

[0017] Figure 3 for Figure 2 The longitudinal sections of section Ⅰ-Ⅰ and section Ⅱ-Ⅱ;

[0018] Figure 4 for Figure 2 Longitudinal sections of section III-III and section IV-IV.

[0019] Reference numerals:

[0020] Inlet gradient section-1, mountain stream culvert section-2, inlet section-3, open channel section-4, chute section-5, chute gradient section-6, energy dissipation section-7. DETAILED DESCRIPTION

[0021] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0022] This embodiment provides a drainage and flood discharge structure for a water conservancy irrigation project. Figure 1-4 , including a sluice gate unit and a mountain stream culvert unit arranged in a vertical direction, wherein the sluice gate unit is located above the mountain stream culvert unit, and the irrigation area channel discharges water through the sluice gate unit above,

[0023] Floods from the gully can pass through the mountain stream culvert unit, and the sluice gate unit and the mountain stream culvert unit are combined at the shared outlet chute and energy dissipation section 7. This junction is where the water flows from the two units and enters the downstream. In this area, the energy of the water flow is consumed to reduce the impact of floods on the downstream environment. The design of this scheme takes into account the characteristics of narrow terrain, and the sluice gate unit and the mountain stream culvert unit are reasonably arranged in the narrow terrain area, realizing the functions of draining the gully and draining water at the same time. This design not only meets the needs of the project, but also maximizes the space utilization.

[0024] In a specific embodiment, see Figure 1-4The mountain stream culvert unit includes, in order according to the direction of water flow: an inlet gradient section 1 and a mountain stream culvert section 2. The mountain stream culvert section 2 is connected to a chute section 5, a chute gradient section 6 and an energy dissipation section 7. The inlet gradient section 1 is composed of two side walls, with an opening at the top, the opening is facing the opposite direction of the water flow, and the channel width gradually decreases, which is used to guide the water flow into the mountain stream culvert section 2; the mountain stream culvert section 2 is a rectangular channel surrounded by four side walls, with openings at both ends. The design of this section makes the water flow in the channel relatively stable and reduces turbulence; the chute section 5 is also composed of two side walls. The channel is surrounded by a channel with an opening at the top. The cross-section shape of the two side walls is a right triangle. The right angles are parallel to each other and face inward, and the channel formed is a vertical rectangle for guiding water flow. The structure of the chute gradient section 6 is similar to that of the inlet gradient section 1. The difference is that its opening direction follows the flow direction of the water, and the channel gradually expands to help the water flow transition from a high speed to a low speed state. The energy dissipation section 7 is of equal diameter design and is connected to the maximum opening of the inlet gradient section 1. The design gradually decelerates the water flow and eventually consumes most of the kinetic energy to reduce the impact of floods.

[0025] In the above design, the inlet section 3 of the mountain stream culvert unit adopts a reduced design, the mountain stream culvert section 2 and the chute section 5 adopt an equal diameter design, and the chute gradient section 6 adopts a gradually expanding design. The design principle of the Venturi tube is used as a whole, so that the water flow is accelerated in the mountain stream culvert section 2 and the chute section 5 through the inlet section 3, and the fluid is gradually decelerated under the action of the chute gradient section 6 and the energy dissipation section 7, thereby reducing the turbulence of the flood and facilitating discharge.

[0026] In a specific embodiment, see Figure 1-4 The sluice gate unit is arranged above the mountain stream culvert unit, specifically, it is arranged directly above the mountain stream culvert section 2, and includes a bifurcated inlet section 3 and an open channel section 4 in order according to the water flow direction. The open channel section 4 is connected to a chute section 5, a chute gradient section 6 and an energy dissipation section 7. The inlet section 3 is composed of two bifurcated inlets and an inlet connected to the open channel section 4. These inlets are used to guide the water flow into the open channel section 4. The open channel section 4 is a channel with an upper opening formed by the two side walls, and its end is located above the chute section 5. Here, the water flow is guided and controlled, ready to enter the next stage of the chute section 5. The chute section 5 is connected to the open channel section 4 to continue to guide the water flow and control its flow. The chute gradient section 6 is similar to the chute section 5, but its design makes the water flow gradually decelerate, providing a smoother condition for the water flow transition. This design places the sluice gate unit above the mountain stream culvert unit, so that the water flow can be better controlled and guided when passing through the open channel section 4 and the chute section 5, thereby effectively achieving the purpose of water discharge.

[0027] In a specific embodiment, the mountain stream culvert L1, the sluice hole width L1, and the chute width L1 are 2.5m, the sluice hole side wall width L2 is 1.0m, the bottom width L3 of the energy dissipation section 77 is 3.0m, the top width L3+2L4 is 9.72m, the bottom height H0 of the sluice hole section is 1.4m, the culvert height H1 is 2.4m, the bottom plate thickness H2 between the culvert hole and the sluice hole is 1.1m, the sluice hole height H4 is 3.25m, and the open channel height H4 is 3.25m.

[0028] The water flow pattern in this example is described as follows:

[0029] The gully flood water flows through the inlet gradient section 1A, then passes through the mountain stream culvert section 2B (length 8.0m), and enters the mountain stream culvert hole at the lower part of the sluice hole section C (length 5.0m). The channel open channel water flows through the upper gate hole of the sluice hole section C (length 5.0m), and then enters the chute section 5D (length 5.0m) to merge, and then passes through the chute gradient section 6E (length 5.0m) and the energy dissipation section 7F (length 5.0m) in turn.

[0030] Technical effect: The sluice gate unit and the mountain stream culvert unit are arranged vertically, sharing the outlet chute and energy dissipation section 7, which is different from the sluice gate and mountain stream culvert of the irrigation area channel project, which are generally arranged separately. This design can optimize the structure in narrow terrain, save engineering investment, meet the irrigation area channel discharge, emptying and maintenance, and ensure that the flood of the gully can pass through the lower part of the channel open channel.

[0031] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A drainage and flood discharge structure for a water conservancy irrigation project, characterized in that: It includes a sluice unit and a mountain stream culvert unit arranged in a vertical direction. The sluice unit is located above the mountain stream culvert unit. Water discharged from the irrigation area channel passes through the sluice unit above, and floods from the gully can pass through the mountain stream culvert unit. A common chute section, chute gradient section and energy dissipation section are arranged at one end of the sluice unit and the mountain stream culvert unit.

2. A water conservancy irrigation project drainage and flood discharge structure according to claim 1, characterized in that: The mountain stream culvert unit comprises, in order according to the water flow direction: an inlet gradient section and a mountain stream culvert section, and the mountain stream culvert section is connected to a chute section, a chute gradient section and an energy dissipation section at the rear.

3. A water conservancy irrigation project drainage and flood discharge structure according to claim 2, characterized in that: The inlet gradient section is composed of two side walls, with an open top facing the opposite direction of the water flow, and the channel width gradually decreases; the mountain stream culvert section is a rectangular channel surrounded by four side walls, with openings at both ends.

4. A water conservancy irrigation project drainage and flood discharge structure according to claim 1, characterized in that: The sluice gate unit is arranged above the mountain stream culvert unit, and comprises a forked inlet section and an open channel section in sequence according to the water flow direction, and the open channel section is connected to a chute section, a chute gradient section and an energy dissipation section behind.

5. A water conservancy irrigation project drainage and flood discharge structure according to claim 4, characterized in that: The inlet section is composed of two bifurcated inlets and an inlet connected to the open channel section. The open channel section is a channel with an upper opening formed by two side walls, and its end is located above the chute section.

6. A water conservancy irrigation project drainage and flood discharge structure according to claim 2 or 4, characterized in that: The chute section is a channel surrounded by two side walls, and the cross-section of the two side walls is a right triangle, with the right-angled sides parallel to each other and facing inward, forming a vertical rectangular channel with an upper opening; the chute gradient section is composed of two side walls, with an upper opening, and the opening direction follows the flow direction of the water, and the channel gradually expands; the energy dissipation section is designed with equal diameters and is connected to the maximum opening of the inlet gradient section.

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