Device for pre-discharging flood water to set water level of reservoir dam

Abstract

The utility model relates to the technical field of water conservancy projects, and discloses a device for pre-discharging flood water to a set water level of a reservoir dam, which is arranged on a reservoir dam body and comprises a drainage fixing pipe horizontally arranged on the reservoir dam body in a penetrating manner, and an inverted U-shaped siphon is arranged at one end of the drainage fixing pipe in a reservoir; the drainage movable pipe is connected to one end, away from the drainage fixed pipe, of the siphon through a flexible pipe; the water inlet tank is connected to the end, away from the siphon, of the water drainage movable pipe, a water inlet is formed in the bottom of the water inlet tank, and a control valve is arranged in the water inlet. The adjusting assembly is connected with the water discharging movable pipe; the adjusting assembly is used for driving the water drainage movable pipe to deflect up and down with the flexible pipe as the center. The device can automatically close the water inlet according to the set flood discharge water level of the small reservoir after water is discharged to the water level, the purpose of accurate pre-discharge is achieved, and the pressure that a reservoir manager pays attention to the water level of the reservoir for a long time during flood discharge duty is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy projects, in particular to a device for pre-discharging flood water from a reservoir dam to a set water level. Background Art

[0002] Reservoir projects are designed to regulate the uneven seasonal distribution of water resources. At the same time, reservoirs can be used to intercept and store floods, reduce the peak flow entering the downstream river, and thus achieve the purpose of reducing flood disasters. The spillway of a small reservoir has no gate control. The elevation of the spillway weir top is the normal water level of the reservoir. Below the normal water level, only the vent pipe can be used for control. When the flood season forecast is large, in order to free up reservoir capacity to store floods, if the reservoir water level does not reach the elevation of the spillway weir top, the reservoir vent pipe needs to be opened to lower the water level to avoid the reservoir water level being too high and the risk of flooding the dam and causing dam collapse.

[0003] The existing small reservoir dam discharge pipe has a water inlet set at the dead water level of the reservoir, and is generally controlled by a screw-type hoist. On the one hand, due to the poor flood regulation capacity of small reservoirs and simple discharge facilities, when heavy rain is forecast, in order to ensure the safety of the dam and facilitate management, the whole dam is often discharged. If the forecast accuracy is insufficient and the water inflow is insufficient, it will easily cause the reservoir water storage capacity to decrease, affecting the reservoir's drought resistance in autumn and winter. On the other hand, when pre-discharging floods, reservoir site managers need to constantly read the water level regularly through the reservoir water level gauge, which is even more inconvenient when releasing water at night. The release time can only be estimated based on the long-term management experience of the on-site managers, and it is difficult to achieve accurate control. Utility Model Content

[0004] The utility model provides a device for pre-discharging flood water from a reservoir dam to a set water level, so as to solve the deficiencies in the above-mentioned prior art.

[0005] The technical solution of the utility model is: a device for pre-discharging flood water from a reservoir dam to a set water level, which is arranged on the reservoir dam body and comprises:

[0006] A fixed water discharge pipe is horizontally installed on the dam body of the reservoir, and an inverted U-shaped siphon is installed at one end of the fixed water discharge pipe located in the reservoir;

[0007] The water discharge movable pipe is connected to the end of the siphon pipe away from the water discharge fixed pipe through a flexible pipe;

[0008] A water inlet tank is connected to the end of the water discharge movable pipe away from the siphon tube, and a water inlet is provided at the bottom of the water inlet tank, and a control valve is provided in the water inlet;

[0009] The adjusting component is connected with the water discharge movable pipe; the adjusting component is used to drive the water discharge movable pipe to deflect up and down with the flexible pipe as the center.

[0010] In at least one embodiment of the present disclosure, an air hole is provided on the top of the water inlet tank, a limit tube is provided below the air hole on the top of the inner wall of the water inlet tank, and a floating block is provided in the limit tube; the floating block is used to block the air hole due to the buoyancy of the water body, and a water pressure sensor is provided on the top of the outer wall of the water inlet tank.

[0011] In at least one embodiment of the present disclosure, the bottom of the water inlet tank is conical, and the control valve includes: a trash net, a disc-shaped rubber sheet, a connecting rod and a lifting member. The trash net is arranged in the water inlet tank, and the trash net is a cone adapted to the bottom of the water inlet tank. The disc-shaped rubber sheet is arranged on the trash net, and the connecting rod vertically passes through the disc-shaped rubber sheet and is connected to the trash net, and the connecting rod passes through the top of the water inlet tank. The lifting member is arranged on the top of the water inlet tank, and the lifting member is connected to the connecting rod.

[0012] In at least one embodiment of the present disclosure, a mounting body is provided on the dam body of the reservoir, a sliding ring is mounted on the movable water discharge pipe, and the adjusting assembly includes: a screw, a connecting block and a rotating wheel, one end of the screw is rotatably connected to the mounting body, and the other end of the screw is rotatably connected to the bottom of the reservoir, the connecting block is rotatably connected to the sliding ring, the connecting block is threadedly connected to the screw, the rotating wheel is arranged on the mounting body, and the rotating wheel is connected to the screw.

[0013] In at least one embodiment of the present disclosure, a water outlet valve is provided at one end of the fixed water discharge pipe away from the siphon pipe.

[0014] In at least one embodiment of the present disclosure, the siphon is placed below the dead water level of the reservoir.

[0015] In at least one embodiment of the present disclosure, the flexible tube is a rubber hose.

[0016] Beneficial effects of the utility model:

[0017] The utility model provides a device for pre-discharging flood water from a reservoir dam to a set water level. The device sets the water level by controlling the height of the water inlet. After the water is discharged to the water level, the disc-shaped rubber sheet of the water inlet is restored to cover the water inlet and the water intake is automatically stopped. The device can accurately pre-discharge and control the reservoir water level according to the predicted precipitation, free up corresponding flood control storage capacity, and reduce the risk of water shortage during drought due to excessive water discharge; at the same time, it reduces the pressure of on-site reservoir management personnel on on-site duty management during the flood season. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the local structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the water inlet tank structure of the utility model;

[0021] Figure 4 This is a detailed structural diagram of the utility model at A;

[0022] Figure 5 It is a schematic diagram of the structure of the utility model trash-blocking net.

[0023] Description of reference numerals:

[0024] 1. Reservoir dam body; 11. Mounting body; 2. Fixed discharge pipe; 21. Siphon; 22. Outlet valve; 3. Active discharge pipe; 31. Sliding ring; 4. Water inlet tank; 41. Water inlet; 42. Control valve; 421. Trash screen; 422. Disc rubber sheet; 423. Connecting rod; 424. Lifting member; 43. Air hole; 44. Limiting pipe; 45. Floating block; 46. Water pressure sensor; 5. Adjustment assembly; 51. Screw; 52. Connecting block; 53. Rotor. DETAILED DESCRIPTION

[0025] The drawings in this disclosure are not drawn strictly according to the actual scale, and the specific size and quantity of each structure can be determined according to actual needs. The drawings described in this disclosure are only schematic diagrams of the structures.

[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the utility model belongs. The words "first", "second" and similar words used in the patent application specification and claims of the utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Inside", "outside", "upper", "lower", "far", "near", "front", "back" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] Combination Figures 1 to 5 As shown, a device for pre-discharging flood water from a reservoir dam to a set water level is arranged on a reservoir dam body 1, comprising:

[0029] The fixed water discharge pipe 2 is horizontally arranged on the reservoir dam body 1, and an inverted U-shaped siphon pipe 21 is arranged at one end of the fixed water discharge pipe 2 located in the reservoir;

[0030] The water discharge movable pipe 3 is connected to the end of the siphon pipe 21 away from the water discharge fixed pipe 2 through a flexible pipe;

[0031] The water inlet tank 4 is connected to the end of the water discharge movable pipe 3 away from the siphon tube 21, and a water inlet 41 is provided at the bottom of the water inlet tank 4, and a control valve 42 is provided in the water inlet 41;

[0032] The adjusting component 5 is connected to the water discharge movable pipe 3; the adjusting component 5 is used to drive the water discharge movable pipe 3 to deflect up and down with the flexible pipe as the center.

[0033] As an alternative embodiment, an air hole 43 is provided on the top of the water inlet tank 4, a limit tube 45 is provided below the air hole 43 on the top of the inner wall of the water inlet tank 4, and a floating block 44 is provided in the limit tube 44; the floating block 45 is used to block the air hole 43 due to the buoyancy of the water body, a water pressure sensor 46 is provided on the top of the outer wall of the water inlet tank 4, and the water inlet of the water discharge movable pipe 3 is flush with the top of the inner wall of the water inlet tank 4. The setting of the water pressure sensor 46 can calculate the water depth of the water inlet of the water discharge movable pipe 3 through h=P / ρg; the floating block 45 is a rubber plug.

[0034] As an alternative embodiment, the control valve 42 includes: a trash net 421, a disc-shaped rubber sheet 422, a connecting rod 423 and a lifting member 424. The trash net 421 is arranged in the water inlet tank 4. The trash net 421 is a cone adapted to the bottom of the water inlet tank 4. The disc-shaped rubber sheet 422 is arranged on the trash net 421. The connecting rod 423 vertically passes through the disc-shaped rubber sheet 422 and is connected to the trash net 421. The connecting rod 423 passes through the top of the water inlet tank 4. The lifting member 424 is arranged at the top of the water inlet tank 4. The lifting member 424 is connected to the connecting rod 423. Specifically, A fixed pulley and a wire loop are provided on the water inlet box 4, and the lifting member 424 includes a motor and a pull rope. The motor is arranged on the mounting body 11, and a wire wheel is provided on the rotating shaft of the motor. The wire wheel passes through the wire loop and passes around the pull rope connected to the connecting rod 423 at the top of the fixed pulley. When draining water, the wire reel is started to pull the connecting rod 423 to lift the dirt net 421. After the water is discharged into the fixed pipe 2, a siphon effect is generated, and the incoming water flow drives the disc-shaped rubber sheet 422 to bend. At this time, the wire reel is released to return the dirt net 421 to its original position, and the water is discharged to the set water level. After the water inlet box 4 is aired, the siphon effect stops, the disc-shaped rubber sheet 422 is restored, and the water inlet 41 is covered to stop the water from entering.

[0035] As an alternative embodiment, a mounting body 11 is provided on the reservoir dam body 1, a sliding ring 31 is mounted on the water discharge movable pipe 3, and the adjustment component 5 includes: a screw 51, a connecting block 52 and a rotating wheel 53. One end of the screw 51 is rotatably connected to the mounting body 11, and the other end of the screw 51 is rotatably connected to the bottom of the reservoir. The connecting block 52 is rotatably connected to the sliding ring 31, and the connecting block 52 is threadedly connected to the screw 51. The rotating wheel 53 is arranged on the mounting body 11, and the rotating wheel 53 is connected to the screw 51; the rotation of the rotating wheel 53 drives the screw 51 to rotate, and the rotation of the screw 51 drives the connecting block 52 to move on the screw 51, so that the sliding ring 31 pulls the water discharge movable pipe 3 to deflect up and down.

[0036] As an alternative embodiment, an outlet valve 22 is provided at one end of the fixed water discharge pipe 2 away from the siphon pipe 21; the outlet valve 22 is used to manually interrupt the water discharge from the downstream and adjust the water discharge amount.

[0037] As an alternative embodiment, the siphon 21 is placed below the dead water level of the reservoir.

[0038] As an alternative embodiment, the flexible tube is a rubber hose. In addition to the rubber hose, the flexible tube can also be replaced by a corrugated tube or the like.

[0039] Working principle and usage of this embodiment:

[0040] The utility model provides a device for pre-discharging flood water from a reservoir dam to a set water level. When the device sets the water discharge level to control the pre-discharge amount, the rotating wheel 53 drives the screw 51 to rotate. During the rotation of the screw 51, since the connecting block 52 is threadedly connected to the screw 51, the rotation of the screw 51 can drive the water discharge active pipe 3 to deflect up and down around the flexible pipe through the connecting block 52 and the sliding ring 31 connected to the connecting block 52, thereby adjusting the depth of the water inlet tank 4 on the water surface. During the depth adjustment of the water inlet tank 4, the staff can timely convert the pressure sent back by the water pressure sensor 46 to obtain the depth of the water inlet tank 4;

[0041] When it is necessary to drain the water, the motor is started or the wire is manually reeled in to pull the pull rope, so that the pull rope drives the connecting rod 423 to move upward, thereby lifting the trash net 421 and driving the disc rubber sheet 422 to lift, opening the water inlet 41, and starting to drain water through the siphon effect of the siphon section. Driven by the incoming water flow, the disc rubber sheet 422 bends, and the water inlet 41 remains open. At this time, the wire reel can be closed to return the trash net 421 to its original position. When there is water in the water inlet tank 4, the floating block 45 floats up to block the air hole 43; when the water inlet tank 4 is exposed to the water surface, the floating block 45 falls to the water inlet tank 4 to take in air, the siphon effect ends, the disc rubber sheet 422 recovers and falls, closing the water inlet 41, and draining the water stops.

[0042] The above embodiments are only specific implementation methods of the utility model patent, which are used to illustrate the technical solution of the utility model patent, rather than to limit it. The protection scope of the utility model patent is not limited thereto. Although the utility model patent is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that any technician familiar with the technical field can still modify the technical solution recorded in the above embodiments within the technical scope disclosed by the utility model, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution implemented by the utility model patent, and should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be based on the protection scope of the claims.

Claims

1. A device for pre-discharging flood water from a reservoir dam to a set water level, arranged on a reservoir dam body (1), characterized in that: include: A fixed water discharge pipe (2) is horizontally installed on the reservoir dam body (1), and an inverted U-shaped siphon pipe (21) is provided at one end of the fixed water discharge pipe (2) located in the reservoir; A water discharge movable pipe (3) is connected to an end of the siphon pipe (21) away from the water discharge fixed pipe (2) through a flexible pipe; A water inlet box (4) is connected to the end of the water discharge movable pipe (3) away from the siphon pipe (21), and a water inlet (41) is provided at the bottom of the water inlet box (4), and a control valve (42) is provided in the water inlet (41); The adjusting component (5) is connected to the water discharge movable pipe (3); the adjusting component (5) is used to drive the water discharge movable pipe (3) to deflect up and down with the flexible pipe as the center.

2. A device for pre-discharging flood water from a reservoir dam to a set water level as claimed in claim 1, characterized in that: An air hole (43) is provided at the top of the water inlet box (4), a limit tube (44) is provided below the air hole (43) at the top of the inner wall of the water inlet box (4), and a floating block (45) is provided inside the limit tube (44); the floating block (45) is used to block the air hole (43) by the buoyancy of the water body, and a water pressure sensor (46) is provided at the top of the outer wall of the water inlet box (4).

3. A device for pre-discharging flood water from a reservoir dam to a set water level as claimed in claim 2, characterized in that: The bottom of the water inlet box (4) is conical. The control valve (42) comprises: a trash net (421), a disc-shaped rubber sheet (422), a connecting rod (423) and a lifting member (424). The trash net (421) is arranged in the water inlet box (4). The trash net (421) is conical and matches the bottom of the water inlet box (4). The disc-shaped rubber sheet (422) is arranged on the trash net (421). The connecting rod (423) vertically passes through the disc-shaped rubber sheet (422) and is connected to the trash net (421). The connecting rod (423) passes through the top of the water inlet box (4). The lifting member (424) is arranged at the top of the water inlet box (4). The lifting member (424) is connected to the connecting rod (423).

4. A device for pre-discharging flood water from a reservoir dam to a set water level as claimed in claim 1, characterized in that: The reservoir dam body (1) is provided with a mounting body (11), the water release movable pipe (3) is sleeved with a sliding ring (31), the adjustment component (5) comprises: a screw rod (51), a connecting block (52) and a rotating wheel (53), one end of the screw rod (51) is rotatably connected to the mounting body (11), the other end of the screw rod (51) is rotatably connected to the bottom of the reservoir, the connecting block (52) is rotatably connected to the sliding ring (31), the connecting block (52) is threadedly connected to the screw rod (51), the rotating wheel (53) is arranged on the mounting body (11), and the rotating wheel (53) is connected to the screw rod (51).

5. The device for pre-discharging flood water from a reservoir dam to a set water level as claimed in claim 1, characterized in that: An outlet valve (22) is provided at one end of the water discharge fixed pipe (2) away from the siphon pipe (21).

6. The device for pre-discharging flood water from a reservoir dam to a set water level as claimed in claim 1, characterized in that: The siphon (21) is placed below the dead water level of the reservoir.

7. The device for pre-discharging flood water from a reservoir dam to a set water level as claimed in claim 1, characterized in that: The flexible tube is a rubber hose.

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