CN110284457B

CN110284457B - Method for treating river sediment

Info

Publication number: CN110284457B
Application number: CN201910588680.6A
Authority: CN
Inventors: 刘欣怡; 陈达; 李筹胜; 赵亚州; 廖迎娣
Original assignee: Hohai University HHU
Current assignee: Hohai University HHU
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2021-04-02
Anticipated expiration: 2039-07-02
Also published as: CN110284457A

Abstract

The invention discloses a method for treating riverway sediment, wherein a sand remover comprises blades which are erected in a riverbed through pile foundations and are driven to rotate by a motor. The sand remover stirs water flow in the riverbed to form a vortex, and silt at the bottom of the stirred riverbed enters the sand storage pool along with the vortex to realize treatment of deposited silt; disturbing the sediment on the surface of the river bed by bending the lower blades downwards so as to enable the sediment to be suspended in water; the silt suspended in the water is lifted to the water surface by bending the upper blade upwards; the overflow of the silt-containing water flow and the sedimentation of silt are facilitated through the slope-shaped embankment; the cables are distributed in the riverbed and the pile foundation, so that the motion trail of the sand-carrying water flow is prevented from being interfered; the monitoring of sediment silt amount in the river bed and the automatic control of the motor on-off are realized through the automatic on-off sensor and the timer. The valve has the advantages of simple structure, convenient operation, low maintenance cost, safe and reliable implementation, is particularly suitable for the front of a gate on a reservoir of a multi-silt river, and has strong practicability and wide applicability.

Description

Method for treating river sediment

Technical Field

The invention relates to a method for treating river sediment, in particular to a method and a device for treating river sediment, and belongs to the technical field of hydraulic engineering.

Background

The problem of silt blockage in front of the gate is commonly existed in a river reservoir with silt, and the gate can be silted up due to serious silt deposition, so that the gate can not be normally opened and closed, and the engineering case of accident caused by failure due to the fact that the gate can not be opened in time occurs at home and abroad.

In order to prevent silting up, small parts of gates are opened all the year round in plain reservoirs in Shanxi Guanzhong, so that precious water resource loss is caused, and continuous economic loss is also caused. More, the gate is provided with a plurality of gates, and the gate can only be discarded without use due to the clogging for many years.

The problem of gate fouling has been a big problem for hydraulic buildings.

Disclosure of Invention

In order to solve the defects of the prior art, the invention aims to provide a method for automatically treating the river channel silt according to the sediment amount of the silt in the river bed.

In order to achieve the above object, the present invention adopts the following technical solutions:

a method for treating the sediment in river channel includes a sand remover in the bed of river containing sediment, a sand storage pool on the bank of river channel corresponding to the sand remover;

the sand storage pool is connected with the river channel through an embankment,

the sand remover stirs the silt in the river channel, the silt enters the sand storage pool along with the stirred water through the weir and is deposited, and the overflowed water flows back into the river channel through the weir.

The sand remover comprises blades which are erected in a river bed through a pile foundation and are driven to rotate by a motor.

Furthermore, the blades are in a cross shape and comprise an upper blade and a lower blade which are crossed.

Furthermore, two ends of the upper blade are in an upward-folding inclination angle, and two ends of the lower blade are in a downward-folding inclination angle.

Further, the motor is powered by a power supply on a river bank through a cable, and the cable is laid at the bottom of a river bed and in a pile foundation.

Furthermore, an automatic opening and closing sensor connected with a motor is arranged on the pile foundation and used for monitoring the height of the sediment accumulation;

the automatic start-stop sensor comprises an infrared sensor.

Still further, the automatic start-stop sensor is connected with a timer; for controlling the time of rotation of the motor.

The blades are provided with blocking alarms and are connected with an alarm device on the river bank through cables; comprises a pressure-sensitive sensor which is arranged around a motor shaft in a disc shape.

The height of the embankment weir is lower than that of the side bank of the river channel, the embankment weir is in a slope shape, the joint of the embankment weir and the river channel is the upper end of the slope, and the joint of the embankment weir and the sand storage pool is the lower end of the slope.

The river channel is provided with a gate, and the sand remover is erected in a riverbed on the inner side of the gate along the flowing direction of river water.

The invention has the advantages that:

the invention relates to a method for treating sediment deposition in a river channel, which comprises the following steps of stirring water flow in a river bed through a sand lifter to form a vortex, and feeding sediment at the bottom of the stirred river bed into a sediment storage tank along with the vortex to treat the deposited sediment; the silt on the surface of the river bed can be disturbed by bending the lower blade downwards, so that the sediment is suspended in the water; the silt suspended in the water can be lifted to the water surface by bending the upper blade upwards; the overflow of the silt-containing water flow and the sedimentation of silt are facilitated through the slope-shaped embankment; the cables are distributed in the riverbed and the pile foundation, so that the situation that the electric wires swing along with the vortex to interfere the motion track of the sand-carrying water flow is avoided; through the blade blocking alarm, the rotating state of the blade is identified through the pressure change after the blade is started, so that the fault is conveniently eliminated; the monitoring of sediment silt amount in the river bed and the automatic control of the motor on-off are realized through the automatic on-off sensor and the timer.

The method for treating the sediment deposition in the river channel has the advantages of simple structure, convenient operation, low maintenance cost and safe and reliable implementation, is particularly suitable for the front of a gate on a reservoir of a sediment-laden river, and has strong practicability and wide applicability.

Drawings

Fig. 1 is a schematic structural view of a sand ejector of the present invention.

Fig. 2 is a schematic structural diagram of the method for treating sediment deposition in a river channel.

The designations in the drawings have the following meanings: 1. pile foundation, 2, upper blade, 3, lower blade, 4, motor, 5, automatic start and stop sensor, 6, jam alarm, 7, cable, 8, storage sand pond, 9, weir, 10, river course, 11, sand-blasting machine, 12, gate.

Detailed Description

The invention is described in detail below with reference to the figures and the embodiments.

A method for treating the sediment deposition in river channel is composed of sand remover 11 and sand pool 8.

Along the flowing direction of river water, the sand-removing device 11 is vertically arranged in the riverbed on the inner side surface of the gate 12 in the riverway 10, the sand-removing device 11 and the sand-removing device 11 are correspondingly arranged on the riverway 10 bank and are connected with the riverway 10 through the embankment weir 9, the embankment weir 9 is in a slope shape, the height of the embankment weir 9 is lower than that of the riverway 10 bank, the joint with the riverway 10 is the upper end of the slope, and the joint with the sand storage pool 8 is the lower end of the slope.

The sand remover 11 consists of blades driven by a motor 4 to rotate, a pile foundation 1, an automatic start-stop sensor 5 and a blocking alarm 6; the blade is in a cross shape and consists of an upper blade 2 and a lower blade 3 which are crossed, wherein two ends of the upper blade 2 are in an upward-folding inclination angle, and two ends of the lower blade 3 are in a downward-folding inclination angle. The motor 4 is fixedly arranged at the top of the pile foundation 1 and is erected in the riverbed through the pile foundation 1, and a power supply of the riverbank supplies power to the motor 4 through a cable 7 laid at the bottom of the riverbed and in the pile foundation 1.

The automatic start-stop sensor 5 connected with the motor 4 is arranged on the pile foundation 1, and the motor 4 is automatically started by monitoring the height of sediment accumulation. The automatic opening and closing sensor 5 is connected with the timer, the rotating time of the motor 4 is limited through the preset time, and the rotation of the motor 4 is closed through the automatic opening and closing sensor 5.

As shown in fig. 1, the automatic start/stop sensor 5 is preferably an infrared sensor, and is preferably disposed in close proximity to the jam alarm 6.

A blocking alarm 6 is arranged on the blade shaft and is connected with an alarm device on the river bank through a cable 7; preferably a pressure sensitive sensor arranged in a disc-like manner around the axis of the motor 4. If the rotating shaft rotates, the pressure of the part contacted with the sensor can be changed, and static pressure is changed into dynamic pressure; if the rotating shaft does not rotate after starting, the pressure of the contact part cannot be changed, the static pressure is maintained, and an alarm is given.

When the device is actually set, the device is put into practical use,

the preferable setting position of the sand remover 11 is a position where the silt in the river channel 10 in front of the gate 12 is easy to accumulate, and the specific position is determined according to the sand carrying amount of the river in front of the gate 12.

The height of the weir 9 is determined according to the designed water level of the river and is slightly lower than the designed water level; the slope gradient can be determined according to the sand carrying capacity of the river.

The size and power of the sand ejector 11 need to be determined by considering the width of the river channel 10, the river flow and the sand carrying capacity of the river, and the design is correct, so that the normal operation of the whole system can be ensured, and the purposes of discharging mud and sand in front of the gate 12 are achieved. The smaller size and power of the sand remover 11 can cause the smaller vortex to be generated, so that sediment cannot enter the sand storage tank 8; the larger size and power will cause the water flow in front of the gate 12 to be disturbed too much, which affects the opening and closing of the gate 12.

The specific steps for treating the sediment deposition of the river channel 10 are as follows:

a1, an automatic start-stop sensor 5 monitors that silt is accumulated to a set cleaning height, a motor 4 is started to rotate a blade, a vortex is generated in water flow, and a timer starts timing;

a2, rising sediment to the water surface along with the vortex to make the surface layer water flow carry a large amount of sediment;

a3, surface layer water flow with large sand carrying capacity crosses over the weir 9 to enter the sand storage pool 8 under the action of vortex centrifugal force;

a4, the sand-carrying water flow is not disturbed in the sand storage pool 8, the water flow is gradually static, the carried sand sinks at the bottom of the sand storage pool 8, and the sand content of the surface water flow is reduced;

a5, the motor 4 continuously rotates, and the vortex continuously stirs the water flow carrying silt into the sand storage pool 8; the clean surface layer water flow after the sediment is released in the sand storage pool 8 is squeezed by the sand-carrying water flow which continuously enters the sand storage pool 8 and flows into the river channel 10 again through the weir 9;

a6, a timer counts the set time, the automatic start-stop sensor 5 turns off the motor 4, and the monitoring of the sediment accumulation height is started again.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.

Claims

1. A method for treating the sediment deposition in a river channel is characterized by comprising a sand remover arranged in a sediment-containing riverbed and a sand storage pool arranged on a riverway river bank and corresponding to the sand remover; the sand storage pool is connected with the river channel through the weir, the sand remover stirs the silt in the river channel, the silt enters the sand storage pool along with the stirred water flow through the weir and is deposited in the sand storage pool, and the overflowed water flows back into the river channel through the weir;

the sand remover comprises blades which are erected in a riverbed through a pile foundation and are driven to rotate by a motor; the blades are in a cross shape and comprise an upper blade and a lower blade which are crossed; the two ends of the upper blade are in an upward-folding inclination angle, and the two ends of the lower blade are in a downward-folding inclination angle; the motor is powered by a power supply on a river bank through a cable, and the cable is laid at the bottom of a river bed and in a pile foundation; an automatic opening and closing sensor connected with a motor is arranged on the pile foundation and used for monitoring the height of sediment accumulation; the automatic start-stop sensor comprises an infrared sensor; the automatic start-stop sensor is connected with the timer; the time for controlling the rotation of the motor; the blades are provided with blocking alarms and are connected with an alarm device on the river bank through cables; comprises a pressure-sensitive sensor which is arranged around a motor shaft in a wafer shape; the height of the embankment is lower than that of the side bank of the river channel, the embankment is in a slope shape, the joint of the embankment and the river channel is the upper end of the slope, and the joint of the embankment and the sand storage pool is the lower end of the slope; the river channel is provided with a gate, and the sand remover is erected in a riverbed at the inner side of the gate along the flowing direction of river water;

the silt on the surface of the river bed can be disturbed by bending the lower blade downwards, so that the sediment is suspended in the water; the silt suspended in the water can be lifted to the water surface by bending the upper blade upwards; the overflow of the silt-containing water flow and the sedimentation of silt are facilitated through the slope-shaped embankment; the cables are distributed in the riverbed and the pile foundation, so that the situation that the electric wires swing along with the vortex to interfere the motion track of the sand-carrying water flow is avoided; through the blade blocking alarm, the rotating state of the blade is identified through the pressure change after the blade is started, so that the fault is conveniently eliminated; the monitoring of sediment silt amount in the river bed and the automatic control of the motor on-off are realized through the automatic on-off sensor and the timer.