Structure for controlling water flow to converge into open flow hole through upper horizontal gate

Abstract

The utility model belongs to the technical field of water conservancy and hydropower engineering, and particularly relates to a structure for controlling water flow to converge into an open flow hole through an upper horizontal gate. The method is particularly suitable for the situation that water flow of the emptying hole converges into the open flow flood discharge hole when the diversion hole is reconstructed into the emptying hole and the open flow flood discharge hole. The structure comprises an energy dissipation chamber, a whole flow guide cover plate, a water outlet and an upper horizontal door. According to the structural form, water flow flowing out of the energy dissipation chamber can be rectified and guided, so that the water flow can be smoothly converged into the open flow hole, and the converged water flow cannot generate a flow state adverse to a project for the water flow of the open flow hole.

Description

Technical Field

[0001] The utility model belongs to the technical field of water conservancy and hydropower engineering, and particularly relates to a structure for controlling water flow into an open flow tunnel by an upper horizontal door. It is particularly suitable for the situation where the water flow of the emptying tunnel is merged into the open flow flood discharge tunnel when the diversion tunnel is converted into an emptying tunnel and an open flow flood discharge tunnel. Background Art

[0002] During the construction of a reservoir, the upstream part of the temporary diversion tunnel is usually converted into a water diversion tunnel for the emptying hole, and the downstream part of the diversion tunnel is converted into an open flow flood discharge tunnel.

[0003] At present, in the reconstruction, considering that the incoming water flow will produce a flow pattern that is unfavorable to the project for the water flow in the open flow tunnel, it is generally necessary to redesign and build a separate water discharge tunnel, which is often arranged at the bottom or side of the flood discharge tunnel. This reconstruction method not only prolongs the construction period, but also increases the project investment. The structural type of this patent can better solve the problem of the flow pattern of the incoming water flow in the open flow tunnel.

[0004] The existing patent with publication number CN 212077859 U discloses a tunnel structure that can be used for diversion, discharge and venting, but the bottom tunnel of the patent adopts a shaft-type gate chamber to control the flow, and the intersection method of the high and low tunnels is not described. Utility Model Content

[0005] The purpose of the utility model is to provide a structure for controlling water flow into an open flow tunnel by an upper horizontal door, so as to solve the technical problem that the water flow into the open flow tunnel will produce a flow state that is unfavorable to the project as mentioned in the above background technology. To solve the above problem, the utility model adopts the following technical solutions:

[0006] In a first aspect, the utility model provides a structure for controlling water flow into an open flow tunnel by an upper horizontal door, comprising:

[0007] The energy dissipation chamber has a water inlet and a water outlet, wherein the water outlet is located at a height higher than the water inlet; the water inlet is used to communicate with the confluence hole, and the water outlet is used to communicate with the open flow hole, the top plate of the energy dissipation chamber constitutes the upper edge of the water outlet, and the bottom plate of the open flow hole constitutes the lower edge of the water outlet;

[0008] A flow guide cover plate is placed flat on the lower edge of the water outlet and extends toward the interior of the energy dissipation chamber;

[0009] The upper horizontal door comprises a support shaft arranged at the upper edge of the water outlet and a door body fixedly mounted on the support shaft; the door body can rotate with the support shaft to adjust the opening of the water outlet.

[0010] Optionally, the upper end of the whole guide cover plate protrudes from the bottom plate of the open flow tunnel and forms a step with the bottom plate of the open flow tunnel.

[0011] Optionally, the height of the step is less than or equal to 0.2 m.

[0012] Optionally, the extension length of the entire guide cover plate toward the interior of the energy dissipation chamber is 2-3 m.

[0013] Optionally, the door body is wing-shaped.

[0014] Optionally, when the door body rotates to the lower extreme position, the distance between the bottom end of the door body and the bottom plate of the open flow tunnel is 0.05m to 0.10m.

[0015] Optionally, it also includes:

[0016] A control room is arranged on both sides of the upper horizontal door, and both ends of the support shaft are hinged in the control room through support hinges.

[0017] Optionally, a sudden expansion area is provided on both sides of the water outlet of the energy dissipation chamber, and both sides of the door body of the upper horizontal door extend to the sudden expansion area.

[0018] Optionally, the door of the control room is arranged on the side wall of the open flow tunnel at the lower side of the sudden expansion area.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. The structural type in the utility model can rectify and guide the water flow out of the energy dissipation chamber so that the water flow can smoothly merge into the open flow tunnel, so that the merged water flow will not produce a flow state that is unfavorable to the project for the water flow in the open flow tunnel.

[0021] 2. The utility model can combine two spillways (such as an emptying tunnel and an open flow spillway tunnel) into one, thereby reducing the length of the confluence tunnel, improving construction efficiency, reducing project investment, giving full play to the discharge capacity of the open flow spillway tunnel, making full use of the roof margin of the open flow tunnel, and facilitating operation and maintenance.

[0022] 3. The structure of the utility model directly sets an upper horizontal door at the outlet of the energy dissipation chamber. Compared with the patent structure of CN 212077859 U, this arrangement avoids the construction of a pressurized shaft gate chamber under high water level, and clarifies the way in which the bottom hole merges into the spillway, solving the problem of the connection flow state of the merged water flow; it saves project investment, shortens the construction period, and is conducive to later operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a structure provided in Example 1 in which an upper horizontal door controls water flow into an open flow tunnel;

[0024] Figure 2 for Figure 1 Schematic diagram of the AA section;

[0025] Figure 3 for Figure 2 Schematic cross-section of the middle energy dissipation chamber, water outlet, and upper horizontal door;

[0026] Figure 4 for Figure 1 Schematic diagram of the middle energy dissipation chamber and upper horizontal door;

[0027] Figure 5 for Figure 4 Schematic diagram of the structure of the middle and upper horizontal door.

[0028] In the figure: 1. Inlet hole; 2. Energy dissipation chamber; 3. Water inlet; 4. Whole guide cover plate; 5. Water outlet; 6. Control room; 7. Control room door; 8. Upper horizontal door; 9. Open flow hole; 10. Steps; 11. Support hinge; 12. Bottom plate; 81. Support shaft; 82. Door body. DETAILED DESCRIPTION

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0030] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention. Example 1

[0031] Combination Figure 1 This embodiment provides a structure in which the upper horizontal door 8 controls the water flow into the open flow hole 9, which includes:

[0032] The energy dissipation chamber 2 has a water inlet 3 and a water outlet 5, wherein the water outlet 5 is located at a height higher than the water inlet 3; the water inlet 3 is used to communicate with the confluence hole 1, and is combined with Figure 2 The water outlet 5 is arranged at the bottom of the open flow tunnel 9 and communicates with the open flow tunnel 9; the top plate of the energy dissipation chamber 2 constitutes the upper edge of the water outlet 5, and the bottom plate 12 of the open flow tunnel 9 constitutes the lower edge of the water outlet 5;

[0033] The whole guide cover plate 4 is placed flat on the lower edge of the water outlet 5 and extends toward the interior of the energy dissipation chamber 2;

[0034] The upper horizontal door 8 comprises a support shaft 81 arranged at the upper edge of the water outlet 5 and a door body 82 fixedly mounted on the support shaft 81; the door body 82 can rotate with the support shaft 81 to adjust the opening of the water outlet 5.

[0035] Specifically, in this embodiment, the upper horizontal door 8 is arranged at the outlet 5 of the energy dissipation chamber 2 to control the flow rate of the incoming water flow and to guide the incoming water flow horizontally into the open flow tunnel 9. The structural type in this embodiment can combine two discharge tunnels (such as the emptying tunnel and the open flow flood discharge tunnel) into one, reduce the length of the incoming tunnel, improve construction efficiency, reduce project investment, give full play to the discharge capacity of the open flow flood discharge tunnel, make full use of the roof margin of the open flow tunnel 9, and facilitate operation and maintenance.

[0036] The upper end of the whole guide cover plate 4 in this embodiment protrudes out of the bottom plate of the open flow hole at the lower side of the water outlet 5 .

[0037] The straightening and guiding cover plate 4 extends into the energy dissipation chamber 2 to straighten and guide the water flow out of the energy dissipation chamber 2, so that the water flow can smoothly merge into the open flow hole 9, solving the problem of the different directions of collision between the discharge water body into the merge hole 1 and the inflow water body of the open flow hole 9.

[0038] The extension length of the whole guide cover plate 4 toward the inside of the energy dissipation chamber 2 is d=2-3m.

[0039] In this embodiment, the cross section of the upper horizontal gate body 82 is designed to be wing-shaped according to the hydraulic characteristics of the upper horizontal gate 8 and the discharge characteristics of the flood discharge tunnel.

[0040] Combination Figure 3 , the outlet 5 section of the energy dissipation chamber 2 is provided with a height difference . Among them, the height of the water outlet 5 of the energy dissipation chamber 2 is ,in Q is the flow into hole 1, It can be 0.75-0.85; B 1 is the outlet width of energy dissipation chamber 2; It is the height difference from the water surface of the reservoir to the top plate of the water outlet 5 of the energy dissipation chamber 2.

[0041] The thickness of the top plate of the energy dissipation chamber 2 is Less than or equal to 0.5m, a step 10 is formed between the upper end of the whole guide cover plate 4 and the bottom plate of the open flow tunnel at the lower side of the outlet 5; the height of the step 10 Less than or equal to 0.2m.

[0042] In order to facilitate the opening and closing of the upper horizontal door 8, when the door body 82 rotates to the lower limit position, the distance between the bottom end of the door body 82 and the open flow hole on the lower side of the water outlet 5 is h =0.05-0.10m.

[0043] Combination Figure 4 , the two sides of the water outlet 5 of the energy dissipation chamber 2 are provided with a sudden expansion, and both sides of the door body 82 of the upper horizontal door 8 extend into the sudden expansion area. The width of the water outlet 5 is B 1 = B 0 -2 , the same as the width of energy dissipation chamber 2, B 0 is the width of the open flow tunnel after the sudden expansion, and the width of the upper door B 2 =B 1 +2 ,in, = 0.5-1.0m, = The width of the sudden expansion is used to arrange the control room door 7 on the side wall of the open flow tunnel and to aerate the water flow at the bottom, which is beneficial to the ventilation and erosion reduction of the water flow downstream of the section. Example 2

[0044] The present embodiment is the same as the first embodiment, but is different from the first embodiment in that: a control room 6 is further provided on both sides of the upper horizontal door 8, and both ends of the support shaft 81 are hinged in the control room 6 through support hinges 11. The control room door 7 of the control room 6 is provided on both side walls of the downstream open flow tunnel.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A structure in which the water flows into the open flow tunnel controlled by the upper horizontal door, characterized in that :include: The energy dissipation chamber (2) has a water inlet (3) and a water outlet (5), wherein the water outlet (5) is located at a height higher than the water inlet (3); the water inlet (3) is connected to the inlet hole (1), and the water outlet (5) is connected to the open flow hole (9); the top plate of the energy dissipation chamber (2) constitutes the upper edge of the water outlet (5), and the bottom plate (12) of the open flow hole (9) constitutes the lower edge of the water outlet (5); A flow guide cover plate (4) is placed flat on the lower edge of the water outlet (5) and extends toward the interior of the energy dissipation chamber (2); The upper horizontal door (8) comprises a support shaft (81) arranged at the upper edge of the water outlet (5) and a door body (82) fixedly mounted on the support shaft (81); the door body (82) can rotate along with the support shaft (81) to adjust the opening of the water outlet (5).

2. The structure of controlling water flow into the open flow tunnel by the upper horizontal door according to claim 1 is characterized in that The upper end of the whole guide cover plate (4) protrudes from the bottom plate (12) of the open flow hole (9) and forms a step (10) between the bottom plate (12) of the open flow hole (9).

3. The structure of controlling water flow into the open flow tunnel by the upper horizontal door according to claim 2 is characterized in that : The height of the step (10) is less than or equal to 0.2 m.

4. The structure of controlling water flow into an open flow tunnel by an upper horizontal door according to claim 1 is characterized in that The extension length of the entire guide cover plate (4) toward the interior of the energy dissipation chamber (2) is 2-3 m.

5. The structure of controlling water flow into the open flow tunnel by the upper horizontal door according to claim 1 is characterized in that : The door body (82) is wing-shaped.

6. The structure for controlling water flow into an open flow tunnel by an upper horizontal door according to claim 1 or 5, characterized in that When the door body (82) rotates to the lower limit position, the distance between the bottom end of the door body (82) and the bottom plate (12) of the open flow hole (9) is 0.05m to 0.10m.

7. The structure of controlling water flow into the open flow tunnel by the upper horizontal door according to claim 1 is characterized in that Also included: A control room (6) is arranged on both sides of the upper horizontal door (8), and both ends of the support shaft (81) are hinged inside the control room (6) via support hinges (11).

8. The structure of controlling water flow into the open flow tunnel by the upper horizontal door according to claim 7 is characterized in that : Sudden expansion areas are provided on both sides of the water outlet (5) of the energy dissipation chamber (2).

9. The structure for controlling water flow into an open flow tunnel by an upper horizontal door according to claim 8, characterized in that The door of the control room (6) is arranged on the side wall of the open flow tunnel (9) at the lower side of the sudden expansion area.

Images