CN108585182B

CN108585182B - Deep water type inverted umbrella aerator impeller

Info

Publication number: CN108585182B
Application number: CN201810362018.4A
Authority: CN
Inventors: 吴代顺; 姚忠亮; 陈益宾; 庄玉贵; 陈国奋
Original assignee: Fujian Normal University
Current assignee: Fujian Normal University
Priority date: 2018-04-20
Filing date: 2018-04-20
Publication date: 2020-11-24
Anticipated expiration: 2038-04-20
Also published as: CN108585182A

Abstract

The invention discloses a deep-water inverted umbrella aerator impeller, which comprises an aerator impeller and a stirring impeller, wherein the aerator impeller comprises a circular central plate vertically connected with an impeller shaft, a plurality of aeration blades are arranged on the central plate, and the aeration blades are divided into two annular parts and are arranged on the central plate. A plurality of aeration blades with equal length are uniformly and annularly arranged on the central plate; a plurality of aeration blades with different lengths are uniformly and annularly arranged on the central plate, and the number of the aeration blades is the same as that of the aeration blades with the same length; the middle of each two adjacent aeration blades with equal length is provided with one aeration blade with different length. The water curtain formed by the rotation of the aeration blades which are arranged in an annular shape and have different lengths fills the inner space of the outermost water curtain, so that the sprinkling amount of the water body is improved, more air is wrapped in the water body in the sprinkling process, and the water body is more fully contacted with the air, thereby enhancing the oxygenation capacity and improving the aeration efficiency.

Description

Deep water type inverted umbrella aerator impeller

Technical Field

The invention relates to an environment-friendly device in sewage treatment, in particular to a deep-water inverted umbrella aerator impeller.

Background

With the development of industry and the advance of urbanization process, environmental problems are prominent, especially water pollution, which brings more serious challenges to China with deficient water resources, so that the increase of water pollution treatment is an urgent task at present. The sewage treatment mostly adopts a biological process, and the key technology of the process is aeration, namely oxygenation, of a biological pool. In addition, because of the shortage of land resources, the biological pond has developed to a deep ditch type, which requires the aeration machine to take account of the stirring function at the same time of aeration so as to prevent the sludge at the bottom of the deep ditch from settling. The vertical inverted umbrella type surface aerator has the advantages of no dirt hanging, no blockage and strong oxygenation capacity and is widely applied in the industry.

At present, the vertical inverted umbrella surface aerator produced at home and abroad forms a single-layer water curtain when a water body thrown out by an impeller in operation, has little water quantity, is not fully contacted with air, and fails to achieve good aeration effect, and the reason for the single-layer water curtain is that the structural form of the impeller of the aerator is unreasonable and is more difficult to achieve the bottom stirring effect required by a deep water biological tank. The key of the impeller structural design is as follows: the volume of water produced by the impeller when it rotates at a given power input. The volume of water is large, the water quantity contacted with air is large, and oxygen in the air is brought into the water in the process, so that the aeration effect is achieved.

Disclosure of Invention

The invention aims to provide an inverted umbrella aerator impeller which has strong oxygenation capacity and is suitable for deep groove type, so that a water body forms a multi-layer water film in the process of throwing, more air is wrapped in the water body, and the water body is more fully contacted with the air, thereby enhancing the oxygenation capacity and improving the aeration efficiency.

The technical scheme adopted by the invention is as follows:

the utility model provides a deep water type is umbrella aeration machine impeller upside down, is including aeration impeller and impeller, impeller coaxial arrangement is in aeration impeller below, aeration impeller installs in reducing gear box transmission shaft lower extreme, the reducing gear box is by motor drive, aeration impeller including connect perpendicularly in epaxial well core plate of impeller, a plurality of aeration blades have been arranged on the well core plate, aeration blade upper end slope is connected with the pressurized-water board, the lower extreme of pressurized-water board is connected on well core plate.

The plurality of aeration blades are disposed on the center plate in two annular portions: a plurality of aeration blades with equal length are uniformly and annularly arranged on the central plate; a plurality of aeration blades with different lengths are uniformly and annularly arranged on the central plate, and the number of the aeration blades is the same as that of the aeration blades with the same length; the middle of each two adjacent equal-length aeration blades is provided with one different-length aeration blade; all the blades provided on the center plate are provided in the radial direction of the center plate.

Taking the shortest blade of the aeration blades with different lengths as a reference, and increasing the lengths of the rest aeration blades with different lengths one by one according to the clockwise or anticlockwise direction. The length of the aeration blades with different lengths is smaller than that of the aeration blades with the same length. In order to further save the power consumption, all the blades arranged on the central plate are provided with a plurality of recesses, so that the weight of the blades is reduced, the rotating speed of the impeller is increased, more air is wrapped, and the explosion rate is improved. Preferably, the number of the equal-length aeration blades is 4-7.

The central plate, the aeration blades and the water pressing plate form an impeller water throwing port; the stirring impeller comprises a gusset plate vertical to the connecting shaft, 3-5 stirring blades are uniformly arranged on the gusset plate, and the stirring blades and the impeller are axially at a water attack angle gamma of 30-45 degrees.

Further, in order to further increase the sprinkling water quantity, the two sides of the equal-length aeration blades are asymmetrically provided with a plurality of fins so as to enhance the disturbance to water flow, increase the contact area of the sprinkling water body and air, enable the water body to wrap the air more in the sprinkling process, and enable the water body to be in contact with the air more fully, thereby enhancing the oxygenation capacity and improving the aeration efficiency.

In the invention, when the aeration impeller runs, the unequal-length aeration blades and the equal-length aeration blades rotate to throw out water to form two layers of water curtains; the water body thrown out by the annular equal-length aeration blades in a rotating way forms an outermost water curtain; in the inner space formed by the outermost water curtain, the water body thrown out by the annular aeration blades with unequal lengths forms a water curtain with a spiral section. Wherein the water curtain formed by the rotation of the aeration blades with unequal lengths which are arranged in an annular shape fills the inner space of the outermost water curtain, the water body throwing amount is improved, more air is wrapped in the water body in the throwing process, and the water body is more fully contacted with the air, so that the oxygenation capacity is enhanced, and the aeration efficiency is improved.

Furthermore, the connecting shaft to the umbrella is telescopic, and the immersion depth of the inverted umbrella can be adjusted according to the actual water level in the operation process, so that the power efficiency of the inverted umbrella is further improved.

Drawings

FIG. 1 is a schematic view of the working part of the deep water type aeration impeller of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a schematic view of the structure of the aeration impeller of the present invention.

FIG. 4 is a schematic view of an isometric aeration blade with fins according to the present invention.

Fig. 5 is a front view of the stirring impeller of the present invention.

Fig. 6 is a plan view of the stirring impeller of the present invention.

Detailed Description

Referring to the attached figure 1, the deep water type inverted umbrella aerator impeller comprises an aerator impeller 1 and a stirrer impeller 2, wherein the stirrer impeller 2 is coaxially arranged below the aerator impeller 1, the aerator impeller 1 is arranged at the lower end of a transmission shaft 3 of a reduction gearbox 5, the reduction gearbox is driven by a motor 4, the aerator impeller 1 comprises a central plate 6 vertically connected to an impeller shaft, a plurality of aerator blades 7 are arranged on the central plate 6, the upper ends of the aerator blades 7 are obliquely connected with a water pressing plate 8, the lower end of the water pressing plate 8 is connected to the central plate 6, and the lower ends of the aerator blades are respectively collected in a bottom frustum 9.

The plurality of aeration blades are disposed on the center plate in two annular portions: a plurality of aeration blades 7-1 with equal length are uniformly and annularly arranged on the central plate; a plurality of aeration blades 7-2 with different lengths are uniformly and annularly arranged on the central plate, and the number of the aeration blades is the same as that of the aeration blades with the same length; the middle of each two adjacent equal-length aeration blades is provided with one different-length aeration blade; all the aeration blades 7 provided on the center plate are arranged in the radial direction of the center plate.

As shown in the attached figure 3, the lengths of the rest aeration blades with different lengths are increased one by one in a clockwise or anticlockwise direction by taking the blade with the shortest length in the aeration blades with different lengths as a reference. The length of the aeration blades with different lengths is smaller than that of the aeration blades with the same length.

In order to further save the power consumption, all the blades arranged on the central plate are provided with a plurality of recesses, so that the weight of the blades is reduced, the rotating speed of the impeller is increased, more air is wrapped, and the explosion rate is improved.

As shown in fig. 4, in order to further increase the amount of water to be sprinkled, the fins 13 are asymmetrically arranged on both sides of the equal-length aeration blade 7-1 to enhance disturbance to water flow, increase the contact area between the water body to be sprinkled and air, so that the water body is more wrapped in the air in the process of being sprinkled and is more fully contacted with the air, thereby enhancing oxygenation capacity and improving aeration efficiency.

Preferably, the number of the equal-length aeration blades is 4-7.

The central plate, the aeration blades and the water pressing plate form an impeller water throwing port 10; the stirring impeller 2 comprises a gusset plate 11 vertical to the connecting shaft, 3-5 stirring blades 12 are uniformly arranged on the gusset plate 11, and the stirring blades 12 and the impeller are axially at a water attack angle gamma of 30-45 degrees.

The connecting shaft to the umbrella is telescopic, and the immersion depth of the inverted umbrella can be adjusted according to the actual water level in the operation process, so that the power efficiency of the inverted umbrella is further improved.

In conclusion, the core of the invention is that when the aeration impeller runs, the unequal-length aeration blades and the water body thrown out by the equal-length aeration blades rotate to form two layers of water curtains; the water body thrown out by the annular equal-length aeration blades in a rotating way forms an outermost water curtain; in the inner space formed by the outermost water curtain, the water body thrown out by the annular aeration blades with unequal lengths forms a water curtain with a spiral section. The water curtain formed by the rotation of the aeration blades with unequal lengths arranged in an annular mode fills the inner space of the outermost water curtain, the sprinkling amount of the water body is improved, more air is wrapped in the water body in the sprinkling process, and the water body is more fully contacted with the air, so that the oxygenation capacity is enhanced, and the aeration effect is achieved to the maximum extent. Meanwhile, the liquid at the bottom of the deep groove forms an upward flow state by utilizing the action of axial flow generated by the stirring impeller, so that the sludge at the bottom is prevented from settling.

Claims

1. The utility model provides a deep water type aeration machine impeller of falling umbrella, including aeration impeller (1) and impeller (2), its characterized in that: the stirring impeller (2) is coaxially arranged below the aeration impeller (1), the aeration impeller is arranged at the lower end of a transmission shaft (3) of a reduction box (5), the reduction box is driven by a motor (4), the aeration impeller comprises a circular central plate (6) vertically connected to an impeller shaft, a plurality of aeration blades (7) are arranged on the central plate (6), the upper ends of the aeration blades (7) are obliquely connected with a water pressing plate (8), and the lower end of the water pressing plate is connected to the central plate;

the method is characterized in that: the aeration blades are arranged on the central plate (6) in two annular parts: a plurality of aeration blades (7-1) with equal length are uniformly and annularly arranged on the central plate; a plurality of aeration blades (7-2) with different lengths are uniformly and annularly arranged on the central plate, and the number of the aeration blades is the same as that of the aeration blades with the same length; the middle of each two adjacent equal-length aeration blades (7-1) is provided with one different-length aeration blade (7-2); all the blades arranged on the central plate are arranged along the radial direction of the central plate;

taking the shortest blade in the aeration blades (7-2) with unequal lengths as a reference, and increasing the lengths of the rest aeration blades with unequal lengths one by one in a clockwise or anticlockwise direction;

the length of the aeration blades (7-2) with different lengths is smaller than that of the aeration blades with the same length.

2. The impeller of the deep water inverted umbrella aerator as claimed in claim 1, wherein: the number of the equal-length aeration blades (7-1) is 4-7.

3. The impeller of the deep water inverted umbrella aerator as claimed in claim 1, wherein: all aeration blades (7) arranged on the central plate (6) are provided with a plurality of pits.

4. The impeller of the deep water inverted umbrella aerator as claimed in claim 1, wherein: a plurality of fins (13) are asymmetrically arranged on two sides of the equal-length aeration blade (7-1).

5. The deep water inverted umbrella aerator impeller of any one of claims 1-4, wherein: the connecting shaft of the inverted umbrella is telescopic.