CN212612246U - Ecological flow lowering device for river blocking engineering - Google Patents

Abstract

The utility model discloses a device is transferred to ecological flow for river blocking engineering, including inlet tube, suction pump and the drain pipe that communicates in proper order, ecological flow transfers the device and still including setting up the installation department at the drain pipe tip of intaking, is provided with on the installation department and floats the subassembly, makes the suction pump suspension is in the impound area. The utility model has the advantages that the installation part and the floating component are arranged on the section of the drain pipe in the water storage area, and the floating component can provide larger buoyancy, thereby ensuring that the water pump is suspended in the nuclear water storage area; the installation department has a plurality of mounts simultaneously, can float the mounting height of subassembly according to the water level altitude mixture control in water storage area, and then guarantees that the suction pump is in the suspended state all the time, effectively avoids the suction pump to sink into the river bottom, guarantees normal operation of leaking down of drawing water.

Description

Ecological flow lowering device for river blocking engineering

Technical Field

The utility model relates to a river blocking engineering especially relates to an ecological flow transfers device for river blocking engineering.

Background

In water conservancy and hydroelectric engineering, in order to maintain downstream ecological environment and maintain downstream ecological balance, an ecological flow lowering structure is commonly used for lowering the water body in an upstream river water storage area to the downstream. At present, most of ecological flow lowering structures utilize a water suction pump to pump upstream water into a downstream river channel. However, when the water pump is installed, the water pump sinks to the bottom of the river due to gravity, so that sediment at the bottom of the river is particularly easy to enter a cavity of the water pump under the action of pumping force of the water pump, and the normal operation of the water pump can be influenced after the water pump runs for a long time; in addition, in the process of pumping water, impurities (particularly large garbage or aquatic plants and the like) in river water easily enter the water pump or block the water inlet of the water inlet pipe, so that the water pump cannot pump water, and normal work is influenced; furthermore, when the river is lowered, the worker can roughly judge the water discharge amount only by the water flow at the water outlet of the water discharge pipe, and cannot grasp the water discharge flow.

Disclosure of Invention

An object of the utility model is to provide a device is transferred to ecological flow for blocking a river engineering not only can make the suction pump suspension in the retaining area, can also filter in advance the water, avoids blockking up the suction pump.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

the ecological flow lowering device for the river blocking engineering comprises a water inlet pipe, a water suction pump and a water drainage pipe which are sequentially communicated; the ecological flow lowering device also comprises

An installation part arranged at the water inlet end part of the drain pipe;

the float subassembly sets up on the installation department, make the suction pump suspension is in the water storage area.

Furthermore, a flow detection unit and a flow regulating valve are arranged on the water discharge pipe.

Further, the flow rate detecting unit includes

The branch pipe is arranged on the drain pipe, and a water permeable hole is formed in the drain pipe at the position corresponding to the branch pipe;

a floating plate disposed in the branch pipe;

the floating rod is provided with a first connecting end and a second connecting end, the first connecting end is connected with the floating plate, and the second connecting end extends outwards to form a branch pipe;

the resetting piece is sleeved on the floating rod positioned in the branch pipe;

and water in the drainage pipe enters the branch pipe through the water permeable holes and pushes the floating plate to move, so that the floating rod extends outwards.

Furthermore, the drain pipe is provided with fixing parts and a collecting box for containing the fixing parts at intervals, the fixing parts comprise a hinged seat arranged at the bottom of the drain pipe and a supporting rod rotatably arranged on the hinged seat, and the supporting rod is sleeved with an inserted rod with a tip.

Furthermore, the mounting part comprises a plurality of fixing frames sleeved on the drain pipe at intervals;

the floating assembly comprises a connecting frame arranged on the fixing frame and a floating piece arranged on the connecting frame, and the floating piece is a buoyancy block, a buoyancy plate or an air bag.

Furthermore, the water inlet of the water inlet pipe is provided with a filtering piece, the water inlet pipe is internally provided with a cleaning component for cleaning the filtering piece, and the cleaning component comprises

A rotating shaft having an upper connection end;

the drainage piece is arranged at the upper connecting end and positioned in the water inlet pipe, and is provided with through holes for enabling water to flow through and drainage holes which are arranged at equal intervals along the circumferential direction of the drainage piece and communicated with the through holes;

the water outlets are respectively communicated with each drainage hole;

the cleaning piece is sleeved on the rotating shaft and is in clearance fit with the filtering piece; and

the support connecting part is used for rotatably connecting the rotating shaft and the inner wall of the water inlet pipe together;

the cleaning assembly has a first state and a second state, and in the first state, the water suction pump is in an idle state to enable the cleaning assembly to be static; under the second state, the suction pump draws water and produces the water that suction was taken out by the play flood peak gets into the inlet tube, and the reaction force of water is applyed and is given drainage member, makes drainage member drive the rotation of cleaning member through the pivot and clears up the debris on the filtering piece medial surface.

Furthermore, the lower connecting end of the rotating shaft penetrates out of the filter piece, and the lower connecting end is provided with an impurity cutting part which comprises a connecting sleeve arranged at the lower connecting end and a cutting knife arranged on the connecting sleeve.

Furthermore, the number of the cutting knives is two, and the cutting knives comprise a horizontal cutting section fixedly connected to the connecting sleeve and a vertical cutting section arranged at the other end of the horizontal cutting section.

Furthermore, the filter element comprises a filter layer with a hemispherical structure and a connecting pipe arranged on the filter layer, and the connecting pipe is screwed with the water inlet pipe; the cleaning piece is an arc-shaped cleaning plate matched with the filter layer.

Further, the support connection part includes

The support frame is arranged at the water inlet of the water inlet pipe; and

the bearing is arranged at the central position of the support frame in a sealing mode, and the rotating shaft penetrates through the bearing.

The utility model has the advantages that the installation part and the floating component are arranged on the section of the drain pipe in the water storage area, and the floating component can provide larger buoyancy, thereby ensuring that the water pump is suspended in the nuclear water storage area; the installation department has a plurality of mounts simultaneously, can float the mounting height of subassembly according to the water level altitude mixture control in water storage area, and then guarantees that the suction pump is in the suspended state all the time, effectively avoids the suction pump to sink into the river bottom, guarantees normal operation of leaking down of drawing water.

The utility model discloses be provided with the fixed part on being close to the drain pipe of water outlet end, but the fixed part cartridge dress is fixed the drain pipe in the ground, avoids the play water tip of drain pipe to swing because of the reaction force of river.

The utility model discloses a drain pipe has flow detection unit and flow control valve, and the discharge of water of flow detection unit visual observation drain pipe, accessible flow control valve adjust the discharge of water, realizes the detection and the control of discharge in the drain pipe, and the controllability is strong.

The utility model discloses water inlet department on the inlet tube has the filter layer, can effectively filter the debris of river (like the silt of great granule, less algae etc.), and be provided with the clearance subassembly in the water inlet of inlet tube, river after the filtration gets into in the inlet tube through the through-hole of drain pan and faucet, because there is the contained angle in faucet and drain pan, the river gives the reverse effort of drain pan in the time of flowing by the faucet, make the drain pan at the inlet tube internal rotation, the pivot drives arc cleaning plate and cleans the filter layer, it is smooth and easy to ensure to intake, and the structure is ingenious, need not with the help of external power source.

The utility model discloses an outer tip of pivot is provided with the cutting knife, and the suction pump during operation, the pivot can drive the cutting knife and rotate, cuts up debris (like aquatic plant, rubbish etc.) in the river, and then prevents that debris winding from on the filter layer, further ensures drawing water smoothly.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Figure 3 is a top view of the floatation assembly of figure 2.

Fig. 4 is an enlarged view of the fixing portion of fig. 1.

Fig. 5 is a view showing a state where the fixing portion is accommodated in fig. 4.

Fig. 6 is an enlarged view of the cleaning assembly of fig. 1.

Fig. 7a is a top view of the drain pan.

Fig. 7b is a schematic view of a water outlet head.

Fig. 8 is a top view of the support connection of fig. 6.

Fig. 9 is another schematic view of the support connection of the present invention.

Fig. 10 is a top view of fig. 9.

Fig. 11 is an enlarged view of the flow rate detection unit in fig. 1.

Detailed Description

The following describes embodiments of the present invention in detail with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1, the ecological flow lowering device for river blocking engineering of the present invention comprises a water inlet pipe 10, a water pump 20 and a water drainage pipe 30 which are sequentially connected (the water drainage pipe 30 comprises a vertical section which is communicated with a water outlet of the water pump 20 and a horizontal section which discharges water into a downstream, i.e. the water drainage pipe 30 is an L-shaped structure); this device is transferred to ecological flow is still including setting up the installation department 40 at the drain pipe 30 tip of intaking, sets up the showy subassembly 50 on installation department 40, and showy subassembly 50 can provide buoyancy, makes suction pump 20 suspend on the water storage area of river, effectively avoids suction pump 20 to sink the end because of gravity, and then prevents that silt from getting into in the suction pump 20 and influencing the normal use of suction pump 20.

As shown in fig. 2-3, the mounting portion 40 includes a fixing frame 401 disposed at an interval on a vertical section of the drainage pipe 30, the floating assembly 50 is detachably connected to the fixing frame 401, and then the floating assembly 50 can be mounted on the fixing frame 401 at any height, so as to ensure that the buoyancy provided by the floating assembly 50 can meet the suspension requirement of the water pump 20, and the floating assembly 50 may be one or two according to the suspension requirement of the water pump 20. Specifically, the floating assembly 50 includes a connecting frame 501 and two floating members symmetrically disposed on the connecting frame 501, the floating members are air bags 502 (of course, a floating block or a floating plate may be used), the connecting frame 501 includes two fixing frames fastened together, and the fixing frames are provided with fastening bolts 503 in a penetrating manner. During the installation with two fixed frame suits on mount 401 of suitable height, two fixed frame lock together, then revolve wrong fastening bolt 503 and install fixed frame on mount 401, dismouting simple and convenient effectively satisfies the installation demand of floating subassembly 50 on mount 401 of co-altitude, guarantees that suction pump 20 is in the suspended state, prevents that suction pump 20 from sinking to the river bottom because of the abundant silt of suction, further reduces the probability that suction pump 20 is blockked up by silt.

As shown in fig. 1, a flow detection unit 60 and a flow control valve 70 are disposed at intervals in the horizontal section of the drain pipe 30, the flow detection unit 60 is used for detecting the flow rate of the outlet water of the drain pipe 30, and the flow rate of the outlet water can be adjusted by the flow control valve 70.

As shown in fig. 11, the flow rate detecting unit 60 includes a branch pipe 601 vertically disposed on the drain pipe 30 and a floating rod 602 vertically inserted into the branch pipe 601, a floating plate 603 capable of floating up and down in an inner cavity of the branch pipe 601 is disposed at a first connection end (i.e., a bottom end) of the floating rod 602, a second connection end (i.e., a top end) of the floating rod 602 extends out of a top wall of the branch pipe 601, a reset member 604 (i.e., a compression spring) is sleeved on the floating rod 602 located in the branch pipe 601, and the floating rod 602 has a flow rate scale mark; the drain pipe 30 corresponding to the branch pipe 601 is provided with a water permeable hole to ensure that water can enter the branch pipe 601. When the water pump 20 works, water in a river flows into a downstream ecological area through the water discharge pipe 30, water in the water discharge pipe 30 flows into the branch pipe 601 through the water permeable holes when flowing through the branch pipe 601, the water pushes the floating plate 603 to move upwards, the floating rod 602 moves upwards, and the water outlet flow of the water discharge pipe 30 is determined by observing the flow scale marks on the floating rod 602; when the water pressure is reduced, the pressure applied on the compression spring is reduced, and the floating rod retracts to a certain length into the inner pipe.

As shown in fig. 1, 4-5, the fixing portions 80 (one, two, or more fixing portions 80 may be provided) are provided at intervals on the horizontal section of the drain pipe 30, and the fixing portions 80 include a hinge seat 801 provided at the bottom of the drain pipe 30, a support rod 802 rotatably provided on the hinge seat 801, and an insertion rod 803 screwed on the support rod 802. Specifically, the hinge base 801 includes a pair of ear plates and a pin shaft penetrating through the ear plates, and the top of the support rod 802 penetrates through the pin shaft and is rotatably matched with the pin shaft, so that the support rod 802 can rotate vertically; the supporting rod 802 is a threaded rod, the inserting rod 803 (with an internal threaded hole) is screwed on the threaded rod, and the total length of the supporting rod 802 and the inserting rod 803 can be adjusted by adjusting the length of the supporting rod 802 screwed into the internal threaded hole, so that the fixing requirement of the drain pipe 30 and the recycling requirement of the inserting rod 803 are met; the bottom of the insertion rod 803 is a conical structure with a tip for easy insertion into the river bed to fix the drainage pipe 30.

As shown in fig. 1, a collecting box F is disposed at the bottom of the drainage pipe 30 close to the fixing portion 80, and when the drainage pipe is idle, the support rod 802 is screwed into the internal threaded hole of the insertion rod 803, so that the length of the fixing portion 80 is shortened as a whole, then the insertion rod 803 is rotated, so that the tip of the insertion rod 803 is aligned with the through hole of the collecting box F, and finally the support rod is screwed outwards, so that the tip of the insertion rod 803 extends into the collecting box F, thereby preventing the insertion rod 803 from swinging when the drainage pipe is idle, preventing the tip of the insertion rod 803 from hurting people, and improving safety.

As shown in fig. 6, a filter element is disposed at the water inlet of the water inlet pipe 10, and the filter element includes a filter layer M (the filter layer M may be a filter net plate or a filter cotton) with a hemispherical structure to prevent larger impurities in the water from entering the water pump 20; be connected with the connecting pipe on filter layer M's the edge, the connecting pipe is the screwed pipe, and inlet tube 10 has the external screw thread, and the screwed pipe spiro union is on inlet tube 10, and the dismouting is simple and convenient, the clearance of being convenient for.

As shown in fig. 6, 7a and 7b, a cleaning assembly 90 is arranged in the water inlet pipe 10, the cleaning assembly 90 includes a rotating shaft 901 rotatably arranged in the water inlet pipe 10 through a supporting connection part, a drain pan 902 having a through hole (the through hole is a funnel-shaped structure with a large bottom and a small top) is arranged through an upper connection end of the rotating shaft 901, a plurality of drain holes communicated with the through hole are uniformly arranged on a top surface of the drain pan 902 at intervals along a circumferential direction of the drain pan 902, a water outlet 903 is arranged in each drain hole, the water outlets 903 are arranged at equal intervals, so that directions of the water outlets 903 are different, and a reaction force is applied to the drain pan 902 during drainage, so that the drain pan 902 rotates;

an arc-shaped cleaning piece (namely an arc-shaped cleaning plate 904) penetrates through the rotating shaft 901 and is arranged at a gap with the inner side surface of the filter layer M, and the arc-shaped cleaning plate 904 can clean fine impurities (such as microalgae attached to a water body due to long-time placement) on the filter layer M in the process that the drain pan 902 drives the rotating shaft 901 to rotate, so that the unsmooth water inlet caused by the accumulation of the fine impurities on the filter layer M is effectively avoided;

wherein the cleaning assembly 90 has a first state and a second state, in the first state, the water pump 20 is in an idle state (i.e. not working) to make the cleaning assembly 90 still; in the second state, the water pumped by the suction force generated by the water pump 20 enters the water inlet pipe 10 through the water outlet 903, and the reaction force of the water is applied to the drain pan 902, so that the drain pan 902 drives the arc cleaning plate 904 to rotate through the rotating shaft 901 to clean the impurities on the inner side surface of the filter layer M.

As shown in fig. 8, the support connection portion includes a support frame 905 (which is a cross, a horizontal rod, or a three-fork rod) fixedly connected to the pipe orifice of the water inlet pipe 10, a bearing 906 coaxially arranged with the rotating shaft 901 is hermetically disposed at a central position of the support frame 905, and the rotating shaft 901 penetrates through an inner hole of the bearing 906. The support connection not only ensures the stability of the cleaning assembly 90, but also ensures that the shaft 901 rotates relative to the inlet pipe 10.

Of course, the supporting connection part may also be a structure as shown in fig. 9 to 10, specifically: the rotating shaft 901 is inserted into a fixed shaft sleeve 909 at the central position of a support 905 (the support is a horizontal rod), a spring positioning ball 910 is disposed on the outer side surface of the support 905, and a guide groove 101 matched with the spring positioning ball 910 is correspondingly disposed on the inner side surface of the water inlet pipe 10, so that the spring positioning ball 910 rotates in the guide groove 101.

As shown in fig. 6, the lower connection end of the rotating shaft 901 penetrates out of the filter layer M, the lower connection end of the rotating shaft is provided with a sundry cutting portion, the sundry cutting portion comprises a connection sleeve 907 arranged at the lower connection end and two cutting knives 908 symmetrically arranged on the connection sleeve 907, and the cutting knives 908 comprise a horizontal cutting section fixedly connected to the connection sleeve 907 and a vertical cutting section arranged at the other end of the horizontal cutting section (i.e. the cutting knives 908 are in an L-shaped structure). When water is pumped, the water outlet head 903 is arranged along the circumferential direction of the drainage disc 902 at intervals and forms an included angle with a through hole of the drainage disc 902, so that a water body discharged from the water outlet head 903 is used for supplying reverse acting force to the drainage disc 902, the drainage disc 902 is stressed to rotate, the rotating shaft 901 and the drainage disc 902 rotate together, the rotating shaft 901 drives the cutting knife 908 to rotate along with the rotating shaft 901 through the connecting sleeve 907 at the bottom, the cutting knife 908 is used for crushing garbage, weeds and the like in a river in the rotating process, the situation that sundries block the filter layer M due to the suction force of the water suction pump 20 is avoided, and the normal operation of.

Adopt the ecological flow transfer device method of letting down, including following content:

sleeving and clamping two connecting frames of the connecting frame 501 on the fixing frame 401, installing the connecting frames on the fixing frame 401 by using fastening bolts 503, and inflating the air bag 502; then the ecological flow lowering device is placed in a water storage area of a river, and the water suction pump 20 is suspended in water under the buoyancy action of the air bag 502;

the horizontal section of the water discharge pipe 30 is positioned on the river bank or the ground of the water storage area, the inserted bar 803 is rotated, the support bar 802 is screwed into the internal thread hole of the inserted bar 803, and the total length of the inserted bar 803 and the support bar 802 is adjusted so that the inserted bar 803 falls off from the collection box F; the inserting rod 803 and the supporting rod 802 are integrally rotated, and the total length of the inserting rod 803 and the supporting rod 802 is adjusted, so that the inserting rod 803 is inserted into the ground to fix the water outlet end of the water outlet pipe 30;

starting the water suction pump 20 (which can be controlled manually or by a PLC), enabling the river water in the water storage area to penetrate through the water permeable filter layer M and enter the water inlet pipe 10 through the water outlet head 903 on the drainage tray 902, and then discharging the water from the drainage pipe 30 to the downstream under the action of the water suction pump 20;

in the process of pumping water, the suction force generated by the water pump 20 can enable river water to penetrate through the filtering area, and the filtering layer M can filter the river water so as to reduce the amount of impurities entering the water pump 20; filtered river water passes through the through holes of the drainage disc 902 under the action of suction force and then is discharged by the water outlet head 903, and because the angle difference exists between the water outlet head 903 and the drainage disc 902, the river water is discharged from the water outlet head 903 and then provides reverse acting force for the drainage disc 902, so that the drainage disc 902 rotates in the water inlet pipe 10, the rotating shaft 901 drives the arc-shaped cleaning plate 904 and the cutting knife 908 to rotate, the inner side surface of the filter layer M is effectively cleaned by the arc-shaped cleaning plate 904, and the circulation of the filter layer M is ensured;

the cutting edge of the cutting knife 908 cuts off or even crushes the sundries (such as garbage, aquatic plants and the like) in the river water in the rotating process, so that the water inlet of the water inlet pipe 10 is protected, the sundries are prevented from being attached to the filter layer M due to attraction, the liquidity of the water inlet is ensured, and normal water drainage is ensured;

in the process of pumping water, when river water flows through the flow detection unit 60, part of water in the water discharge pipe 30 enters the branch pipe 601 through the water permeable holes, and the floating plate 603 and the floating rod 602 are pushed to move upwards under the action of water pressure; the float rod 602 can float up and down due to the change of the water pressure, so that the flow can be observed visually, and the flow can be adjusted and specific flow data can be mastered by combining the float rod with the flow adjusting valve 70.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in fig. 1), and if the specific posture is changed, the directional indicator is changed accordingly. In the present invention, unless otherwise expressly stated or limited, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Claims (10)

1. An ecological flow lowering device for river blocking engineering comprises a water inlet pipe, a water pump and a water drain pipe which are sequentially communicated; the method is characterized in that: the ecological flow lowering device also comprises

An installation part arranged at the water inlet end part of the drain pipe;

the float subassembly sets up on the installation department, make the suction pump suspension is in the water storage area.

2. The ecological flow lowering device for river damming engineering according to claim 1, characterized in that: and the drainage pipe is provided with a flow detection unit and a flow regulating valve.

3. The ecological flow lowering device for river damming engineering according to claim 2, characterized in that: the flow rate detecting unit includes

The branch pipe is arranged on the drain pipe, and a water permeable hole is formed in the drain pipe at the position corresponding to the branch pipe;

a floating plate disposed in the branch pipe;

the floating rod is provided with a first connecting end and a second connecting end, the first connecting end is connected with the floating plate, and the second connecting end extends outwards to form a branch pipe;

the resetting piece is sleeved on the floating rod positioned in the branch pipe;

and water in the drainage pipe enters the branch pipe through the water permeable holes and pushes the floating plate to move, so that the floating rod extends outwards.

4. The ecological flow lowering device for river damming engineering according to claim 1, characterized in that: the drain pipe is provided with fixing parts and a collecting box for containing the fixing parts at intervals, the fixing parts comprise hinged seats arranged at the bottom of the drain pipe and supporting rods rotatably arranged on the hinged seats, and the supporting rods are sleeved with inserting rods with tip ends.

5. The ecological flow lowering device for river damming engineering according to claim 1, characterized in that: the mounting part comprises a plurality of fixed frames sleeved on the drain pipe at intervals;

the floating assembly comprises a connecting frame arranged on the fixing frame and a floating piece arranged on the connecting frame, and the floating piece is a buoyancy block, a buoyancy plate or an air bag.

6. The ecological flow lowering device for river damming engineering according to claim 1, characterized in that: the water inlet of inlet tube department is provided with and filters the piece, is provided with in the inlet tube and is used for the clearance filter the clearance subassembly of piece, the clearance subassembly includes

A rotating shaft having an upper connection end;

the drainage piece is arranged at the upper connecting end and positioned in the water inlet pipe, and is provided with through holes for enabling water to flow through and drainage holes which are arranged at equal intervals along the circumferential direction of the drainage piece and communicated with the through holes;

the water outlets are respectively communicated with each drainage hole;

the cleaning piece is sleeved on the rotating shaft and is in clearance fit with the filtering piece; and

the support connecting part is used for rotatably connecting the rotating shaft and the inner wall of the water inlet pipe together;

the cleaning assembly has a first state and a second state, and in the first state, the water suction pump is in an idle state to enable the cleaning assembly to be static; under the second state, the suction pump draws water and produces the water that suction was taken out by the play flood peak gets into the inlet tube, and the reaction force of water is applyed and is given drainage member, makes drainage member drive the rotation of cleaning member through the pivot and clears up the debris on the filtering piece medial surface.

7. The ecological flow lowering device for river damming engineering according to claim 6, wherein: the lower connecting end of the rotating shaft penetrates out of the filtering piece, the lower connecting end is provided with a sundries cutting part which comprises a connecting sleeve and a cutting knife, wherein the connecting sleeve is arranged at the lower connecting end, and the cutting knife is arranged on the connecting sleeve.

8. The ecological flow lowering device for river damming engineering according to claim 7, wherein: the cutting knife is two, and the cutting knife is including linking firmly horizontal cutting section on the adapter sleeve and setting are in the vertical cutting section of another tip of horizontal cutting section.

9. The ecological flow lowering device for river damming engineering according to claim 6, wherein: the filter piece comprises a filter layer with a hemispherical structure and a connecting pipe arranged on the filter layer, and the connecting pipe is screwed with the water inlet pipe; the cleaning piece is an arc-shaped cleaning plate matched with the filter layer.

10. The ecological flow lowering device for river damming engineering according to claim 6, wherein: the support connection part comprises

The support frame is arranged at the water inlet of the water inlet pipe; and

the bearing is arranged at the central position of the support frame in a sealing mode, and the rotating shaft penetrates through the bearing.

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