阅读说明：本技术 一种簸箕形进水流道 (Dustpan-shaped water inlet flow channel ) 是由 王勇 熊伟 刘厚林 刘庆 谈明高 王凯 董亮 于 2020-07-15 设计创作，主要内容包括：本发明提供了一种簸箕形进水流道,包括沿着流动方向设置的直线进口段、弯曲转向段、喇叭口整流段；直线进口段用于引流,直线进口段的底板包括与水平面呈预设夹角的直线段；弯曲转向段与直线进口段形成吸水箱；弯曲转向段的底部为簸箕形圆弧结构；弯曲转向段设有ω形后壁,ω形后壁的截面包括两个半径不相同的圆弧；喇叭口整流段用于对水流的流态以及流速进行整流,以使水流的水力性能良好。本发明通过改变进水流道直线进口段后部分底板,可以预防引发不良涡带；且通过在弯曲转向段设置ω形后壁,可以对水流进入到喇叭口整流段进口之前起到整流作用,可以降低流道水力损失,从而使得水泵装置效率大幅度提高。(The invention provides a dustpan-shaped water inlet flow channel, which comprises a linear inlet section, a bent turning section and a bell mouth rectifying section, wherein the linear inlet section, the bent turning section and the bell mouth rectifying section are arranged along the flowing direction; the linear inlet section is used for drainage, and a bottom plate of the linear inlet section comprises a linear section which forms a preset included angle with the horizontal plane; the bent turning section and the straight line inlet section form a water suction box; the bottom of the bending steering section is of a dustpan-shaped arc structure; the bending and turning section is provided with an omega-shaped rear wall, and the section of the omega-shaped rear wall comprises two arcs with different radiuses; the horn mouth rectifying section is used for rectifying the flow state and the flow speed of the water flow so as to ensure that the hydraulic performance of the water flow is good. The invention can prevent the generation of bad vortex strips by changing the back part of the bottom plate of the straight inlet section of the water inlet runner; and through set up omega shape back wall at the crooked section that turns to, can play the rectification effect before can getting into horn mouth rectification section import to rivers, can reduce runner hydraulic loss to make pumping plant efficiency increase substantially.)

1. A dustpan-shaped water inlet channel is characterized by comprising a linear inlet section (1), a bent turning section (2) and a bell mouth rectifying section (3) which are arranged along the flowing direction;

the linear inlet section (1) is used for drainage, and a bottom plate of the linear inlet section (1) comprises a linear section which forms a preset included angle with a horizontal plane;

the bent turning section (2) is used for rotating the water flow direction by 90 degrees and forms a suction box together with the linear inlet section (1); the bottom of the bending steering section (2) is of a dustpan-shaped arc structure; one end of the bent turning section (2) far away from the linear inlet section (1) is provided with an omega-shaped rear wall, and the section of the omega-shaped rear wall comprises two arcs with different radiuses;

the position of the horn mouth rectifying section (3) is positioned at the upper part of the water suction box and is used for rectifying the flow state and the flow speed of water flow so as to ensure that the hydraulic performance of the water flow is good.

2. The dustpan-shaped inlet channel according to claim 1, characterized in that the top of the linear inlet section (1) comprises a first circular arc structure;

the section of the straight-line inlet section (1) along the direction A-A' is rectangular.

3. The dustpan-shaped water inlet flow passage according to claim 2,

the length of the linear inlet section (1) is 3.48 times of the diameter of the outlet of the dustpan-shaped water inlet runner;

the width of the linear inlet section (1) is 2.71 times of the diameter of the outlet of the dustpan-shaped water inlet channel;

the inlet height of the linear inlet section (1) is 2.42 times of the diameter of the outlet of the dustpan-shaped water inlet runner;

the radius of the first arc structure is 0.37 times of the diameter of the outlet of the dustpan-shaped water inlet flow passage.

4. The dustpan-shaped water inlet channel according to claim 1, characterized in that the top plate of the linear inlet section (1) forms an angle of 21 degrees with the horizontal plane;

the preset included angle is 7 degrees.

5. The dustpan-shaped water inlet flow passage according to claim 1,

the length of the bending steering section (2) is 2.11 times of the diameter of the outlet of the dustpan-shaped water inlet runner;

the width of the inlet of the bending steering section (2) is 2.71 times of the diameter of the outlet of the dustpan-shaped water inlet channel;

the height of the bending and turning section (2) is 1.26 times of the diameter of the outlet of the dustpan-shaped water inlet channel.

6. The dustpan-shaped water inlet flow passage according to claim 1, characterized in that the flared rectifying section (3) comprises a flare, and the generatrix of the flare is shaped like 1/4 arcs.

7. The dustpan-shaped inlet channel of claim 6, wherein the two arcs that are different in radius include a first arc and a second arc;

the radius of the first arc is 1.35 times of the diameter of the outlet of the dustpan-shaped water inlet flow passage, and the circle center position of the first arc is positioned on the central axis of the bell mouth;

the radius of the second arc is 0.43 times of the diameter of the outlet of the dustpan-shaped water inlet channel, and the circle center positions of the second arc are positioned on two sides of the circumference of the bell mouth and are perpendicular to the flow tangential direction after rectification.

8. The dustpan-shaped water inlet flow passage according to claim 1,

the length of the omega-shaped rear wall is 1.16 times of the diameter of the outlet of the dustpan-shaped water inlet flow passage;

the height of the sideline of the omega-shaped back wall is 0.27 times of the diameter of the outlet of the dustpan-shaped water inlet flow passage.

9. The dustpan-shaped water inlet flow passage according to claim 1,

a middle clapboard is arranged in the water absorption tank;

the shape of the middle clapboard is consistent with the shape of the longitudinal direction of the suction box.

10. The dustpan-shaped water inlet channel of claim 6,

the diameter of an inlet of the bell mouth rectifying section (3) is 1.9 times of the diameter of an outlet of the dustpan-shaped water inlet flow passage;

the outlet of the bell mouth rectifying section (3) is the outlet of the dustpan-shaped water inlet flow channel;

the radius of the horn mouth generatrix arc is 0.5 times of the outlet of the dustpan-shaped water inlet runner.

Technical Field

The invention relates to the technical field of hydraulic engineering pump stations, in particular to a dustpan-shaped water inlet flow channel.

Background

The pump station water inlet channel is divided into an elbow-shaped water inlet channel, a bell-shaped water inlet channel and a dustpan-shaped water inlet channel according to the shape. Compared with the elbow-shaped water inlet channel, the dustpan-shaped water inlet channel has low requirement on the length of the channel; compared with a bell-shaped water inlet flow channel, the dustpan-shaped water inlet flow channel has no strict requirement on the width of the flow channel. And the dustpan-shaped water inlet runner has simple runner line shape and convenient construction, and is a better water inlet runner form.

The patent No. CN201510329842.6 discloses a dustpan-shaped water inlet channel with excellent hydraulic performance and an application method thereof, and is characterized in that the dustpan-shaped water inlet channel has excellent hydraulic performance, and the requirements on the site construction technology of the water inlet channel are reduced on the premise of ensuring the construction quality; the patent number CN201710086005.4 discloses a design method of a dustpan type water inlet flow passage for a pump station, and particularly discloses a design formula of main geometric parameters of the dustpan type water inlet flow passage for the pump station, which is characterized in that the design method has a specific design calculation formula, can effectively improve the safety performance of the pump station, and is beneficial to computer programming application and computer aided design; the patent number is CN201610018554.3, discloses a method for designing a three-dimensional body flow surface of a water inlet channel of a high-performance large-flow pump station, and discloses a method for designing a three-dimensional body flow surface of a water inlet channel of a high-performance large-flow pump station.

In summary, the structural optimization methods for the dustpan-shaped water inlet channel are few at present, and most of the optimization methods are directed to the design method and the application method for providing the dustpan-shaped water inlet channel.

Disclosure of Invention

The invention provides a dustpan-shaped water inlet flow channel, which can improve the hydraulic performance of water flow by improving the flowing state of the water flow when the water flow enters a bell mouth, thereby improving the running performance of a water pump device.

The embodiment of the invention provides a dustpan-shaped water inlet channel, which comprises a linear inlet section, a bent turning section and a bell mouth rectifying section, wherein the linear inlet section, the bent turning section and the bell mouth rectifying section are arranged along the flowing direction;

the linear inlet section is used for drainage, and a bottom plate of the linear inlet section comprises a linear section which forms a preset included angle with the horizontal plane;

the bent turning section is used for rotating the water flow direction by 90 degrees and forms a water suction box together with the linear inlet section; the bottom of the bending steering section is of a dustpan-shaped arc structure; one end of the bent turning section, which is far away from the linear inlet section, is provided with an omega-shaped back wall, and the section of the omega-shaped back wall comprises two arcs with different radiuses;

the position of the horn mouth rectifying section is positioned at the upper part of the water suction box and is used for rectifying the flow state and the flow speed of water flow so as to ensure that the hydraulic performance of the water flow is good.

Further, the top of the linear inducer includes a first arc configuration;

the section of the straight inlet section along the direction A-A' is rectangular.

Further, the length of the linear inlet section is 3.48 times of the diameter of the outlet of the dustpan-shaped water inlet channel;

the width of the linear inlet section is 2.71 times of the diameter of the outlet of the dustpan-shaped water inlet flow passage;

the inlet height of the linear inlet section is 2.42 times of the diameter of the outlet of the dustpan-shaped water inlet flow passage;

the radius of the first arc structure is 0.37 times of the diameter of the outlet of the dustpan-shaped water inlet flow passage.

Furthermore, the included angle between the top plate of the linear inlet section and the horizontal plane is 21 degrees; the preset included angle is 7 degrees.

Further, the length of the bending and turning section is 2.11 times of the diameter of the outlet of the dustpan-shaped water inlet channel;

the width of the inlet of the bending steering section is 2.71 times of the diameter of the outlet of the dustpan-shaped water inlet channel;

the height of the bending and turning section is 1.26 times of the diameter of the outlet of the dustpan-shaped water inlet channel.

Further, the horn mouth rectifying section comprises a horn mouth, and the shape of a horn mouth generatrix is 1/4 circular arcs.

Further, the two arcs with different radiuses comprise a first arc and a second arc; the radius of the first arc is 1.35 times of the diameter of the outlet of the dustpan-shaped water inlet flow passage, and the circle center position of the first arc is positioned on the central axis of the bell mouth; the radius of the second arc is 0.43 times of the diameter of the outlet of the dustpan-shaped water inlet flow passage, and the circle centers of the second arc are positioned at two sides of the circumference of the bell mouth and are vertical to the flow tangential direction after rectification.

Further, the length of the omega-shaped rear wall is 1.16 times of the diameter of the outlet of the dustpan-shaped water inlet flow passage; the height of the sideline of the omega-shaped back wall is 0.27 times of the diameter of the outlet of the dustpan-shaped water inlet channel.

Furthermore, a middle clapboard is arranged in the water absorption tank; the shape of the middle clapboard is consistent with the shape of the longitudinal direction of the suction box.

Furthermore, the diameter of an inlet of the horn mouth rectifying section is 1.9 times of the diameter of an outlet of the dustpan-shaped water inlet flow channel; the outlet of the bell mouth rectifying section is the outlet of the dustpan-shaped water inlet flow channel; the radius of the horn mouth generatrix arc is 0.5 times of the outlet of the dustpan-shaped water inlet runner.

The dustpan-shaped water inlet flow passage provided by the invention has the following beneficial effects:

the dustpan-shaped water inlet channel comprises a linear inlet section, a bent turning section and a bell mouth rectifying section which are arranged along the flowing direction; the linear inlet section is used for drainage, and a bottom plate of the linear inlet section comprises a linear section which forms a preset included angle with the horizontal plane; the bent turning section is used for rotating the water flow direction by 90 degrees and forms a water suction box together with the linear inlet section; the bottom of the bending steering section is of a dustpan-shaped arc structure; one end of the bent turning section, which is far away from the linear inlet section, is provided with an omega-shaped back wall, and the section of the omega-shaped back wall comprises two arcs with different radiuses; the position of the horn mouth rectifying section is positioned at the upper part of the water suction box and is used for rectifying the flow state and the flow speed of water flow so as to ensure that the hydraulic performance of the water flow is good. According to the invention, the bottom plate at the rear part of the linear inlet section of the water inlet channel is changed to form a preset included angle with the horizontal plane, so that the flow speed deviation of the inner and outer side channels can be generated before water flow enters the bending and turning section, and bad vortex strips caused by overlarge flow speed deviation of the inner and outer side channels in a short time in the bending and turning section can be prevented; and through set up omega shape back wall at the crooked section that turns to, can play the rectification effect before can getting into horn mouth rectification section import to rivers, can reduce runner hydraulic loss, improve rivers velocity distribution degree of consistency, the average angle of speed weighting that rivers got into pump unit to make pump unit efficiency increase substantially.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a side view of a dustpan-shaped water inlet channel according to an embodiment of the present invention;

fig. 2 is a top view of a dustpan-shaped water inlet channel according to an embodiment of the invention;

fig. 3 is a three-dimensional view of a dustpan-shaped water inlet channel according to an embodiment of the invention;

FIG. 4 is a schematic view of a partition wall according to an embodiment of the present invention;

wherein the reference numerals in the figures correspond to: 1-a linear inlet section, 2-a bending turning section and 3-a bell mouth rectifying section.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.