CN103290809A

CN103290809A - Desilting device of water channel bend

Info

Publication number: CN103290809A
Application number: CN2013102514999A
Authority: CN
Inventors: 胡再国
Original assignee: Sichuan University
Current assignee: Sichuan University
Priority date: 2013-06-24
Filing date: 2013-06-24
Publication date: 2013-09-11

Abstract

The invention discloses a desilting device of a water channel bend, relates to the field of desilting. The desilting device of the water channel bend is designed due to the fact that silt sediments easily in the bend. According to the technical scheme, the desilting device of the water channel bend is characterized in that a desilting nest is arranged at the bend position of a water channel and outside the arc-shaped part of the water channel, a depression is formed in the arc-shaped part of the water channel and is a semi-circular cone face or a semi-circular cone face with the top cut, and the conical degree is 1:1. The top view of the depression is a trapezoid, the ratio of the short edge and the long edge, being parallel, of the trapezoid is 1:2-1:5, and the long edge is located on the edge of the desilting nest. Observation is carried out in the water flow direction, the position where the water flow reaches the depression firstly is lower than the position where the water flow departs from the depression in the vertical direction. The desilting device of the water channel bend has the advantages that the specific weight of the silt is large, so that the silt falls into the depression of the water channel easily; the water flow performs a climbing process at the depression position from the observation in the water flow direction, so that washing of the silt into the desilting nest is facilitated.

Description

A kind of water channel bend desilting device

Technical field

The present invention relates to the desilting field, particularly at the bend of water channel.

Background technology

Bend at water channel, current will occur in and turn to, and have circular motion to a certain degree, because moving object has straight-line inertia, fluid tends to impact the outside of arch section, silt precipitates at the turning easily owing to than great, be subjected to stopping of bend, cause water channel to narrow down, accumulate over a long period, even cause water channel to stop up in this part, have influence on the utilization of water channel.

Summary of the invention

Utilize bend to deposit desilting easily, the present invention designs a kind of water channel bend desilting device.

The present invention realizes that the technical scheme that goal of the invention adopts is: a kind of water channel bend desilting device, it is characterized in that: at the turning of water channel, there is a desilting nest in the outside of the arch section of water channel, the arch section of water channel has a depression, depression is a semicircle conical surface or the semicircle conical surface that eliminates the top, and tapering is 1:1.The vertical view of depression is two trapezoidal, trapezoidal parallel limits, and minor face is 1:2-1:5 with the ratio on long limit, and long limit is positioned at desilting nest edge.Observe from the direction of current, the position that current arrive depression at first is lower than the position that current leave depression at vertical direction.

The invention has the beneficial effects as follows: the depression of water channel, the ratio of silt is great, silt is fallen into the recess of water channel easily, the straight-line inertia of current, cause the flow velocity of the water of recess to be close to 0, the current that splash back of current collision recess walls promote that silt is subjected to displacement, and are conducive to silt and assemble to the desilting nest; Observe from the direction of current, the position that current arrive depression at first is lower than the position that current leave depression at vertical direction, just current are equipped with a climbing process in pit bit, further stop moving ahead of silt, simultaneously also increased the backflow of current at concave face, with silt underwashing in heavy mud nest.

Description of drawings

Fig. 1 is a kind of water channel bend desilting device schematic diagram.Fig. 2 is desilting nest vertical section schematic diagram.

Wherein, 1, water channel, 2, depression, 3, desilting nest.

The specific embodiment

Turning at water channel 1, there is a desilting nest 3 in the outside of water channel 1 arc, water channel 1 arch section has a depression 2, the effect of depression has been the effect of training for sediment, and depression 2 is a semicircle conical surface, preferably eliminates the half-conical at top, tapering is that the angle of 1:1(and horizontal direction is close to 30 degree), the vertical view of depression 2 is two trapezoidal, trapezoidal parallel limits, and minor face is 1:2-1:5 with the ratio on long limit.

Claims

1. water channel bend desilting device, it is characterized in that: the turning in water channel (1), there is a desilting nest (3) in the outside of the arch section of water channel (1), the arch section of water channel (1) has a depression (2), depression (2) is a semicircle conical surface or the semicircle conical surface that eliminates the top, and tapering is 1:1.

2. a kind of water channel bend desilting device according to claim 1 is characterized in that: the vertical view of depression (2) is two trapezoidal, trapezoidal parallel limits, and minor face is 1:2-1:5 with the ratio on long limit, and long limit is positioned at desilting nest (3) edge.

3. a kind of water channel bend desilting device according to claim 1 is characterized in that: observe from the direction of current, the position that current arrive depression (2) at first is lower than the position that current leave depression (2) at vertical direction.