Water diversion tunnel forebay energy dissipation system

Abstract

The utility model discloses a diversion tunnel forebay energy dissipation system which comprises a forebay, a water inlet, an energy dissipation device, a water inlet pipe, a water outlet pipe, an energy dissipation device and an energy dissipation device, and the front end of the forebay is a water inlet; the energy dissipation plate is located in the forebay, and the energy dissipation plate is connected with the water inlet; the overflow dam is located between the energy dissipation plate and the tunnel entrance; the hanging plate is hung in the middle of the forebay, and the hanging plate is a telescopic hanging plate. According to the diversion tunnel forebay energy dissipation system, the energy dissipation plate is arranged, so that primary energy dissipation can be carried out on water flow entering the forebay; by arranging the overflow dam, the water flow can be subjected to secondary energy dissipation between the energy dissipation plate and the overflow dam; by arranging the lifting plate, three-stage energy dissipation is conducted on water flow; and main silt in the water flow can be deposited along the overflow dam, and a small amount of residual silt is deposited when the slope tail ridge climbs, so that the silt is favorably deposited in the forebay and does not enter the tunnel, and centralized dredging is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of water conservancy projects, and in particular relates to an energy dissipation system for a forebay of a water diversion tunnel. Background Art

[0002] In existing high-head hydropower stations, when using a diversion tunnel to divert water to the main water pipe inlet area above the power station, the water flow rate is relatively fast before entering the diversion tunnel. If energy dissipation is not performed, the water flow will impact the diversion tunnel, which will not only affect normal water diversion but also cause certain safety hazards. Therefore, energy dissipation is required before the water enters the diversion tunnel. Utility Model Content

[0003] In order to solve the above problems, the utility model proposes an energy dissipation system for a forebay of a water diversion tunnel.

[0004] The utility model discloses a water diversion tunnel forebay energy dissipation system, comprising: a forebay, the front end of the forebay is a water inlet, the rear end of the forebay is connected to a tunnel entrance; an energy dissipation plate, the energy dissipation plate is located in the forebay, and the energy dissipation plate is connected to the water inlet; an overflow dam, the overflow dam is located between the energy dissipation plate and the tunnel entrance; a hanging plate, the hanging plate is suspended in the middle of the forebay, and the hanging plate is a telescopic hanging plate.

[0005] Optionally, there are at least two energy dissipation plates, which are staggered, the length direction of the energy dissipation plate is consistent with the width direction of the front pool, the height of the energy dissipation plate is less than the height of the front pool, and the length of the energy dissipation plate is greater than half of the width of the front pool.

[0006] Optionally, the overflow dam and the energy dissipation plate are both installed on the inner bottom wall of the front pool, and the overflow dam is located behind the energy dissipation plate.

[0007] Optionally, a fixing plate is provided at the middle top of the front pool, the fixing plate is arranged along the width direction of the front pool, and the bottom of the fixing plate is connected to a hanging plate via a steel wire rope.

[0008] Optionally, the hanging plate includes a concrete shell, the interior of the concrete shell is slidably connected to an inner plate, and a spring is further provided between the top of the inner plate and the inner wall of the concrete shell.

[0009] Optionally, cylindrical guide rails are installed on both side walls of the concrete shell, and sliding blocks are fixed on both sides of the upper end of the inner plate, and the sliding blocks cooperate with the guide rails.

[0010] Optionally, the inner plate is a water-absorbing plate.

[0011] Optionally, an elastic rope or a steel wire rope is passed through the middle of the spring.

[0012] Optionally, a sloped tail sill is also provided at the tunnel entrance, and the sloped tail sill is in an arc shape.

[0013] The beneficial effects of the utility model are:

[0014] The energy dissipation system of the water diversion tunnel forebay of the utility model can dissipate the energy of the water flow entering the forebay at the first level by arranging the energy dissipation plate; can dissipate the energy of the water flow at the second level between the energy dissipation plate and the overflow dam by arranging the overflow dam; can dissipate the energy of the water flow at the third level by arranging the hanging plate; the main sediment in the water flow can be deposited along the overflow dam, and the remaining small amount of sediment is deposited when climbing the slope tail bank, which is conducive to the sedimentation inside the forebay and will not enter the tunnel, so as to facilitate centralized dredging; after multiple levels of energy dissipation, the impact force of the water flow finally entering the tunnel is greatly reduced, so as to avoid damage to the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the energy dissipation system of the water diversion tunnel forebay of the utility model.

[0016] Figure 2 It is a schematic diagram of the internal structure of the hanging plate of the utility model.

[0017] Reference numerals:

[0018] Forebay 1; tunnel entrance 2; energy dissipation plate 3; overflow dam 4; hanging plate 5; concrete shell 501; inner plate 502; guide rail 503; slider 504; spring 505; slope tail sill 6; fixed plate 7; wire rope 8. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0020] like Figure 1-Figure 2 As shown, the water diversion tunnel forebay energy dissipation system of the present invention comprises: a forebay 1, an energy dissipation plate 3, an overflow dam 4 and a hanging plate 5. The front end of the forebay 1 is a water inlet, and the rear end of the forebay 1 is connected to the tunnel entrance 2.

[0021] The energy dissipation plate 3 is located in the forebay 1 and is connected to the water inlet; there are at least two energy dissipation plates 3, which are staggered, and specifically, the energy dissipation plates 3 are staggered along the length direction of the forebay 1. The water flow entering the forebay 1 from the water inlet will first impact the energy dissipation plate 3 to perform primary energy dissipation.

[0022] The length direction of the energy dissipation plate 3 is consistent with the width direction of the front pool 1 , and the height of the energy dissipation plate 3 is less than the height of the front pool 1 .

[0023] The length of the energy dissipation plates 3 is greater than half of the width of the forebay 1 , and the water flow can only flow through the gaps between the energy dissipation plates 3 or over the energy dissipation plates 3 after impacting the energy dissipation plates 3 .

[0024] The overflow dam 4 is located between the energy dissipation plate 3 and the tunnel entrance 2; the overflow dam 4 and the energy dissipation plate 3 are both installed on the inner bottom wall of the forebay 1, and the overflow dam 4 is located behind the energy dissipation plate 3. The overflow dam 4 has a buffering and energy dissipation effect on the water flow. When the water flows through the overflow dam 4, it spreads laterally, and the main sediment in the water body is deposited along the overflow dam 4, which is conducive to the sediment deposition inside the forebay 1 and will not overflow into the tunnel, which is convenient for centralized dredging. When the water flows through the overflow dam 4, it swirls and turbulently at the overflow dam 4 to perform secondary energy dissipation.

[0025] The hanging board 5 is suspended in the middle of the front pool 1, and the hanging board 5 is a telescopic hanging board.

[0026] A fixed plate 7 is provided at the middle top of the forebay 1, and the fixed plate 7 is arranged along the width direction of the forebay 1. The lower part of the fixed plate 7 is connected to the hanging plate 5 by a steel wire rope 8. When the water flow is large, the hanging plate 5 can float with the water flow to perform three-level energy dissipation.

[0027] like Figure 2 As shown, the hanging plate 5 includes a concrete shell 501, an inner plate 502 is slidably connected inside the concrete shell 501, and a spring 505 is arranged between the top of the inner plate 502 and the inner wall of the concrete shell 501. When the water flow is large, the inner plate 502 can slide out of the concrete shell 501 to dissipate the energy of the water flow; when the water flow decreases, the inner plate 502 can be pulled back into the concrete shell 501 under the action of the spring 505.

[0028] The inner plate 502 is a water-absorbing plate, preferably a silicate plate. When the water flow is large, that is, after the water flow contacts the inner plate 502, the inner plate 502 absorbs water and becomes heavier, so that the inner plate 502 slides out of the concrete shell 501. When the water flow decreases, the inner plate 502 slowly loses water and becomes lighter, and is pulled back into the concrete shell 501 under the action of the spring 505.

[0029] Cylindrical guide rails 503 are installed on both side walls of the concrete shell 501 , and sliders 504 are fixed on both sides of the upper end of the inner plate 502 . The sliders 504 are integrally formed with the inner plate 502 , and the sliders 504 cooperate with the guide rails 503 .

[0030] An elastic rope or a steel wire rope is passed through the middle of the spring 505. When the inner plate 502 and the concrete shell 501 are connected by the steel wire rope, the other end of the steel wire rope passes through the concrete shell 501 and is connected to the winch located on the fixed plate 7; when the water flow is large, the inner plate 502 absorbs water, and after the weight increases, the inner plate 502 pulls the steel wire rope and the spring 505 downward to slide out of the concrete shell 501, and the sliding out length of the steel wire rope needs to be limited. After the water flow decreases, the winch pulls the steel wire rope to retract the inner plate 502 into the concrete shell 501.

[0031] A slope tail 6 is also provided at the tunnel entrance 2, and the slope tail 6 is in an arc shape. The slope tail 6 is a combination of a slope and a tail sill, so that when the water reaches the slope tail sill 6, it will be affected by the additional mass force when climbing the slope, and it is easier to form a water jump when reaching the tail sill 6, thereby forming an energy dissipation zone between the overflow dam 4 and the slope tail sill 6, further dissipating the energy of the water flow.

[0032] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; 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.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A water diversion tunnel forebay energy dissipation system, characterized in that: include: A fore pool, wherein the front end of the fore pool is a water inlet, and the rear end of the fore pool is connected to the tunnel entrance; An energy dissipation plate, which is located in the fore pool and connected to the water inlet; An overflow dam, wherein the overflow dam is located between the energy dissipation plate and the tunnel entrance; The hanging plate is suspended in the middle of the front pool, and the hanging plate is a telescopic hanging plate.

2. The water diversion tunnel forebay energy dissipation system according to claim 1, characterized in that: There are at least two energy dissipation plates, which are staggered. The length direction of the energy dissipation plate is consistent with the width direction of the front pool. The height of the energy dissipation plate is less than the height of the front pool, and the length of the energy dissipation plate is greater than half of the width of the front pool.

3. The water diversion tunnel forebay energy dissipation system according to claim 1, characterized in that: The overflow dam and the energy dissipation plate are both installed on the inner bottom wall of the front pool, and the overflow dam is located behind the energy dissipation plate.

4. The water diversion tunnel forebay energy dissipation system according to claim 1, characterized in that: A fixing plate is provided at the middle top of the front pool, and the fixing plate is arranged along the width direction of the front pool. The lower part of the fixing plate is connected to the hanging plate through a steel wire rope.

5. The water diversion tunnel forebay energy dissipation system according to claim 4, characterized in that: The hanging plate comprises a concrete shell, the interior of the concrete shell is slidably connected to an inner plate, and a spring is arranged between the top of the inner plate and the inner wall of the concrete shell.

6. The water diversion tunnel forebay energy dissipation system according to claim 5, characterized in that: Cylindrical guide rails are installed on both side walls of the concrete shell, and sliding blocks are fixed on both sides of the upper end of the inner plate, and the sliding blocks are matched with the guide rails.

7. The water diversion tunnel forebay energy dissipation system according to claim 6, characterized in that: The inner plate is a water-absorbing plate.

8. The water diversion tunnel forebay energy dissipation system according to claim 5, characterized in that: An elastic rope or a steel wire rope is passed through the middle of the spring.

9. The water diversion tunnel forebay energy dissipation system according to claim 1, characterized in that: A slope tail sill is also arranged at the tunnel entrance, and the slope tail sill is in an arc shape.

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