Impeller of waterwheel type aerator and aerator

Abstract

The impeller mainly comprises an impeller body, blades and a connecting disc, connecting rings are arranged at the two ends of the impeller body, no less than two protruding force transmission tenons are arranged on the connecting rings, force transmission grooves matched with the force transmission tenons are formed in the connecting disc, and the blades are arranged on the connecting disc. After the connecting disc is connected with the connecting ring at the end part of the impeller body, the force transmission tenon is matched into the force transmission groove of the connecting disc; the outer side of the connecting disc can be provided with a connecting position and a connecting hole which are connected with a flange of an output shaft of the waterwheel aerator; a waterwheel type aerator mainly comprises a floating body, a power assembly and an impeller, the floating body is mainly composed of a main floating pontoon, two auxiliary floating pontoons and a support, one end of the main floating pontoon is provided with a connecting plate connected with the support, the middle of the support is connected with the connecting plate of the main floating pontoon, and the two ends of the support are each provided with one auxiliary floating pontoon; the power assembly is installed on the main pontoon, and the decelerated output shaft drives the impeller to rotate for oxygenation.

Description

Technical Field

[0001] The invention belongs to aquaculture equipment, and particularly relates to an impeller of a waterwheel type aerator and an aerator with the impeller. Background Art

[0002] The impellers of common waterwheel type aerators are all equipped with plate-shaped blades with holes, resulting in poor aeration effect and low power efficiency. There is also, for example, a combined aerator disclosed in Chinese Patent No. 200710137759.4, which is composed of a longitudinal floating body and a transverse floating body, and can reduce costs. However, it is found in actual use that the transverse floating boat will slow down the water flow generated by the rotation of the impeller and affect the water body exchange effect. Chinese Patent No. 200710137759.4 also discloses a stacked impeller of a waterwheel type aerator, which is composed of a plurality of single impeller bodies stacked and combined into an impeller. Through actual use tests, the aerator equipped with this impeller can improve the power efficiency and has obvious energy-saving effects compared with the aerator equipped with the impeller with plate-shaped blades with holes. However, the manufacture of the stacked impeller is troublesome and the production efficiency is low, which is very uneconomical today when the labor cost has increased significantly. Summary of the Invention

[0003] The purpose of the invention is to provide an impeller with low production cost by integral forming and a waterwheel type aerator with good flow-pushing effect.

[0004] An impeller of a waterwheel type aerator mainly includes an impeller body, blades, and a connecting disc. Connecting rings are arranged at both ends of the impeller body, and no less than two protruding force-transferring tenons are arranged on the connecting rings. Force-transferring grooves adapted to the force-transferring tenons are arranged on the connecting disc. After the connecting disc is connected to the connecting ring at the end of the impeller body, the force-transferring tenons are fitted into the force-transferring grooves of the connecting disc. A connecting position and connecting holes for flange connection with the output shaft of the waterwheel type aerator can be arranged on the outside of the connecting disc; or a shaft-matching hole is arranged in the impeller body, and spokes are arranged around the shaft-matching hole to connect the impeller body; the blades are arranged on the impeller body.

[0005] The blades are radially distributed outside the impeller body, the blades are axially parallel and arranged on the impeller body, and there is a gap between the blades; or the adjacent blades at the connection end of the blades and the impeller body are interconnected, and there is a gap between the non-connection end adjacent blades.

[0006] The impeller body is cylindrical, the blades are radially distributed on the cylindrical surface of the cylindrical impeller body, the blades are axially parallel and arranged on the cylindrical surface, and there is a gap for the water body to pass through when the impeller works between adjacent blades; circular connecting rings are arranged at both ends of the impeller body, and force-transferring tenons or force-transferring grooves are arranged on the circular connecting rings, or force-transferring tenons and force-transferring grooves are arranged; the force-transferring tenons or force-transferring grooves can be adapted to the force-transferring tenons or force-transferring grooves arranged on the connecting disc.

[0007] The described blade is angular, with reinforcing bars on the back of the blade. The ratio of the working surface width of the blade to the clearance is 12:1 - 8:1. The outer end of the blade is a ladle-shaped structure with an arc transition.

[0008] The diameters of both ends of the described impeller body are larger than the diameter in the middle, and it is a stepped structure. The described blades are arranged axially on the outer circle of the stepped impeller body, and the blades at both ends can be arranged at the steps.

[0009] A waterwheel type aerator mainly includes: a floating body, a power assembly, and an impeller. The floating body is mainly composed of a main floating boat, two auxiliary floating boats, and a bracket. A connecting plate for connecting the bracket is provided at one end of the main floating boat. The middle of the bracket is connected to the connecting plate of the main floating boat, and an auxiliary floating boat is provided at each end of the bracket. The power assembly is installed on the main floating boat, and the output shaft after deceleration drives the impeller to increase oxygen. Or multiple floating boats are connected by brackets and float on the water surface to form a floating body. A power assembly is provided on the floating body, the output shaft after deceleration drives a transmission shaft, and an impeller is provided on the transmission shaft. The power assembly includes a motor connected to a speed reducer, and the output shaft of the speed reducer after deceleration drives the impeller. Or a low-speed permanent magnet motor does not use a speed reducer, and the motor shaft directly drives the impeller.

[0010] The width-to-length ratio of the described main floating boat is 1:5 - 1:8. The connection position between the main floating boat and the bracket is connected to a connecting plate extending in the length direction on the upper part of the main floating boat. The connecting plate can be set to be suitable for a bracket made of a square tube or a round tube. The main floating boat and the connecting plate are blow-molded together.

[0011] The described auxiliary floating boat is blow-molded. A device for connecting to the bracket is embedded in the middle of the top of the auxiliary floating boat. An auxiliary floating boat with an embedded connecting device is connected to each end of the bracket, and the connecting device and the bracket are fastened with bolts. The connecting device on the top of the auxiliary floating boat includes a bottom plate, an embedded body, and a support seat. The support seat is arranged on the upper side of the bottom plate, and the embedded body is arranged on the lower side of the bottom plate. The described auxiliary floating boat is blow-molded, and the injection-molded connecting device is pre-installed in the mold. After the hot plastic blank enters the cavity, compressed air is blown in to expand the plastic blank to form and wrap the embedded body. After cooling, the connecting device and the auxiliary floating boat become an integral body.

[0012] The upper panel of the described floating boat is a closed boat-shaped structure. Installation holes for connecting the main machine are provided around the upper panel of the floating boat. The position of the installation holes is equivalent to the deck of the hull. The deck needs to be stronger than the hull. For example, the thickness of the upper panel of the commonly used floating boat is about 4 mm, and the thickness of the vertical plate and the bottom plate is 3 mm. The deck needs to be 5 mm or more. During the blow-molding process, local material shortage defects will occur at the joints of the upper panel, vertical plate, and deck, affecting the service life of the floating body. In the present invention, a groove is provided on the upper plane where the upper panel of the floating body is connected to the vertical plate, so that no material shortage will occur at the joint of the upper panel and the vertical plate of the floating boat, and the service life of the floating boat can be improved.

[0013] The impeller described above includes an impeller body and blades. The impeller includes a single-group structure or multiple-group structures. The blades of the multiple-group structures can be divided into two-group structures, three-group structures, or structures with more than three groups. Each group has no less than three blades that are arranged staggeredly on the impeller body. The impeller body and the blades are integrally injection-molded into an impeller.

[0014] The prominent advantages of the present invention compared with the prior art are: The impeller is integrally injection-molded, with high production efficiency. For an impeller with parallel blades, when working, it is equivalent to multiple dippers working simultaneously to splash water, and the flow is pushed far; for an impeller with staggeredly arranged blades, the diffusion effect of oxygen-rich water can be improved when working. A floating body composed of a main floating ship, two auxiliary floating ships, and a bracket overcomes the technical problem that the lateral floating body slows down the water flow generated by the rotation of the impeller and affects the water body exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a three-dimensional schematic diagram of the impeller of the present invention; (the blades are arranged parallel to the impeller body) Figure 2 is of the present invention Figure 1 three-dimensional schematic diagram of the impeller in another direction; Figure 3 is a three-dimensional schematic diagram of the impeller of the present invention; (the blades are arranged staggeredly on the impeller body) Figure 4 is a three-dimensional schematic diagram of the impeller with a shaft hole arranged in the impeller body of the present invention; Figure 5 is a cross-sectional schematic diagram of the impeller of the present invention; Figure 6 is a combined schematic diagram of the connecting plate and the flange of the present invention; Figure 7 is a three-dimensional structural schematic diagram of the connecting plate of the present invention; Figure 8 is of the present invention Figure 7 three-dimensional structural schematic diagram in another direction; Figure 9 is a schematic diagram of the interconnection of the impellers and the connection with the connecting plate of the present invention; Figure 10 is a three-dimensional schematic diagram of the connecting seat of the auxiliary floating ship of the present invention; (the installation position of the crossbar is square) Figure 11 is a three-dimensional schematic diagram of the connecting seat of the auxiliary floating ship of the present invention; (the installation position of the crossbar is square) Figure 12 is a three-dimensional schematic diagram of the connecting seat of the auxiliary floating ship of the present invention; (the installation position of the crossbar is square) Figure 13 is a three-dimensional schematic diagram of the connecting seat of the auxiliary floating ship of the present invention; (the installation position of the crossbar is square) Figure 14 is a three-dimensional schematic diagram of the connecting seat of the auxiliary floating ship of the present invention; (the installation position of the crossbar is circular) Figure 15 Is a three-dimensional schematic diagram of the auxiliary floating ship connecting seat of the present invention; (the installation position of the cross arm is circular) Figure 16 Is a three-dimensional schematic diagram of the auxiliary floating ship connecting seat of the present invention; (the installation position of the cross arm is semi-circular) Figure 17 Is a three-dimensional schematic diagram of the auxiliary floating ship connecting seat of the present invention; (the installation position of the cross arm is square) Figure 18 Is a three-dimensional schematic diagram of the auxiliary floating ship connecting seat of the present invention; (the installation position of the cross arm is circular) Figure 19 Is a three-dimensional schematic diagram of the auxiliary floating ship connecting seat of the present invention Figure 20 Is a three-dimensional schematic diagram of the auxiliary floating ship connecting seat of the present invention; (there are two groups of holes connected to the cross arm) Figure 21 Is a three-dimensional schematic diagram of the auxiliary floating ship of the present invention Figure 22 Is a three-dimensional schematic diagram of the auxiliary floating ship of the present invention Figure 23 Is a three-dimensional schematic diagram of the upper cavity of the auxiliary floating ship mold of the present invention Figure 24 Is a three-dimensional schematic diagram of the lower cavity of the auxiliary floating ship mold of the present invention Figure 25 Is a three-dimensional schematic diagram of the main floating ship of the present invention Figure 26 Is a three-dimensional schematic diagram of the main floating ship of the present invention Figure 27 Is a three-dimensional schematic diagram of the main floating ship of the present invention Figure 28 Is a three-dimensional schematic diagram of the main floating ship of the present invention Figure 29 Is a three-dimensional schematic diagram of the groove provided on the top of the floating ship of the present invention Figure 30 Is a sectional view of the floating ship of the present invention Figure 31 Is a three-dimensional schematic diagram of the upper die of the mold of the present invention Figure 32 Is a three-dimensional schematic diagram of the lower die of the mold of the present invention Figure 33 Is a sectional view of the mold and the floating ship of the present invention Figure 34 Is a three-dimensional schematic diagram of the main floating ship and the auxiliary floating ship cross arm connected into a floating body of the present invention Figure 35 Is a three-dimensional schematic diagram of the main floating ship and the auxiliary floating ship cross arm connected into a floating body of the present invention Figure 36It is a three-dimensional schematic diagram of the floating body formed by connecting the main floating ship and the cross arm of the auxiliary floating ship of the present invention; Figure 37 It is a three-dimensional schematic diagram of the aerator of the present invention; Figure 38 It is a three-dimensional schematic diagram of the aerator of the present invention; (impeller with plate-type blades of the prior art) Figure 39 It is a three-dimensional schematic diagram of the aerator of the present invention; (blades are arranged on the impeller body with dislocation) Figure 40 It is a three-dimensional schematic diagram of the aerator of the present invention.

[0016] In the figure: impeller body 1, connecting ring 11, force-transmitting tenon 13, screw hole 131, force-transmitting groove 14, hole 141, blade 2, support rib 21, shaft-matching hole 22, spoke 23, metal insert 24, connecting plate 3, small ring 31, large ring 32, support bar 33, reinforcing rib 34, connecting position 36, connecting hole 37, large hole 38, screw 39, flange 5, connecting seat 6, bottom plate 61, support seat 62, hole 63, hole 64, embedding body 65, upper nut 66, lower nut 67, concave cavity 68, bolt 69, transmission shaft 7, impeller with plate-type blades 8, impeller 9, motor output shaft 81, motor 82, speed reducer 83, output shaft 84, main floating ship 85, auxiliary floating ship 86, floating ship 87, groove 88, mounting hole 89, permanent magnet synchronous motor 90, fixing seat 91, connecting hole 92, connecting position 93, groove 94, bracket 95, bearing seat 96, base 98, connecting hole 99, upper cavity 100, placing position 101, lower cavity 102, guide post 103, upper panel 104, vertical plate 105, fixed shaft 106, electric wire 107, deck 108, upper die 109, punch 110, lower die 111. Specific implementation method

[0017] The following further describes the present invention with specific embodiments in conjunction with the attached drawings. See Figure 1 —40: It should be noted that the features of the embodiments of the present application can be combined with each other without conflict. Unless otherwise clearly defined and limited in the description of the present invention, the terms "installation", "connection", "fixed connection", and "fixation" should be understood in a broad sense, which can be a fixed connection, a detachable connection, a direct connection, or an indirect connection.

[0018] An impeller of a waterwheel type aerator mainly includes an impeller body 1, blades 2, and a connection disk 3. Connection rings 11 are provided at both ends of the impeller body 1, and there are no less than two protruding force transmission tenons 13 or on the connection rings 11. A force transmission groove 14 adapted to the force transmission tenon 13 is provided on the connection disk 3. After the connection disk 3 is connected to the connection ring 11 at the end of the impeller body, the force transmission tenon 13 is fitted into the force transmission groove 14 of the connection disk. During operation, the force transmission tenon 13 and the force transmission groove 14 transmit torque. The impeller body 1 and the blades 2 can be integrally injection-molded with plastic, and the force transmission tenon 13 can also be integral with the impeller body 1. The inside of the injection-molded force transmission tenon 13 can be set as a hollow structure to adapt to the injection molding process. The connection disk 3 can also be injection-molded. After the impeller body 1 and the connection disk 3 are assembled, they can be fastened with screws 39 or pins. A connection position 36 and connection holes 37 for flange connection with the output shaft of the waterwheel type aerator can be provided on the outside of the connection disk 3. The flange 5 is fastened with bolts, and the flange 5 is installed on the output shaft 84 of the waterwheel type aerator. During operation, the power assembly drives the impeller to rotate for aeration. Or a shaft matching hole 22 is provided inside the impeller body 1, and spokes 23 are provided around the shaft matching hole 22 to connect the impeller body 1. The shaft matching hole 22, the spokes 23, the blades 2, and the impeller body 1 are integrally injection-molded. A metal insert 24 can be provided inside the shaft matching hole 22 and fastened to the transmission shaft 7 with screws.

[0019] The blades 2 are radially evenly distributed outside the impeller body 1. The blades are axially parallel to each other on the impeller body 1, and there is a gap between the blades 2. The connecting ends of the blades 2 and the impeller body 1 are connected together, that is, there is a gap between the non-connecting ends of the blades.

[0020] The impeller body 1 is cylindrical. The blades 2 are radially evenly distributed on the cylindrical surface of the cylindrical impeller body. The blades are axially arranged in parallel on the cylindrical surface, and there is a gap for the water body to pass through when the impeller works between adjacent blades. Circular connection rings are provided at both ends, and force transmission tenons 13 or force transmission grooves 14 are provided on the circular connection rings. The connection disk 3 is also circular, and force transmission tenons and force transmission grooves adapted to the force transmission tenons 13 or force transmission grooves 14 on the connection ring can be provided on the connection disk 3.

[0021] The blades are angular, with reinforcing bars on the back of the blades. The ratio of the working surface width (C) of the blades to the gap (D) is 12:1 - 8:1. The outer ends of the blades are arc-transitioned spoon-shaped structures. The blades are evenly distributed in groups of 5 - 8 in the radial direction on the cylindrical impeller body. Preferably, the blades are evenly distributed in groups of 6 in the radial direction on the cylindrical impeller body. Each impeller has no less than two groups of blades that are aligned both radially and axially on the impeller body. Compared with the misaligned setting of the blades, the impeller with the aligned blades can improve the water pushing effect of the impeller on the water body during operation, and has a better effect on the aquaculture of benthic aquatic products such as crabs.

[0022] The two port diameters of the described impeller body 1 are larger than the middle diameter, presenting a stepped structure; the blades are arranged axially on the outer circumference of the impeller body with the stepped structure, and water passing holes can be provided on the outer circumference of the impeller body, and the blades 2 at both ends can be arranged at the steps. The force transmission tenons 13 and force transmission grooves 14 can be provided on the plane of the connecting ring.

[0023] The waterwheel type aerator with the impeller described in the present invention mainly includes: a floating body and a power assembly. The power assembly includes a motor vertically installed on the speed reducer. The floating body is mainly composed of a main floating boat 85, two sub-floating boats 86 and a bracket 95. A connection position 93 for connecting the bracket is provided at one end of the main floating boat 85. The middle of the bracket 95 is connected to the connection position 93 of the main floating boat 85, and a sub-floating boat 86 is provided at each end of the bracket 95; the power assembly is installed on the main floating boat 85, and the output shaft after deceleration drives the impeller to rotate for aeration. Compared with the T-shaped combined floating body of the comparative document patent 200710137759.4, the aerator of the present invention has no transverse floating boat blocking water, and the water flow under the bracket during operation can improve the aeration effect.

[0024] The high-power aerator includes at least two floating boats 87 connected by a bracket 95 to float on the water surface to form a floating body. A power assembly or a permanent magnet synchronous motor 90, a bearing seat 96 and a transmission shaft 7 are provided on the floating body. The output shaft after deceleration drives the transmission shaft, and an impeller is provided on the transmission shaft; the power assembly includes a motor connected to a speed reducer, and the output shaft after the speed reducer decelerates drives the impeller, or the low-speed permanent magnet synchronous motor 90 directly drives the transmission shaft and the impeller to rotate together for aeration without using a speed reducer.

[0025] The described impeller includes an impeller body 1 and blades 2. The impeller includes a single-group blade structure or a multi-group blade structure. The multi-group blade structures can be divided into two-group structures, three-group structures or more than three-group structures, and each group has no less than two blades and can be arranged in a staggered manner (see Figure 3 ) or arranged neatly on the impeller body (see Figure 1 Figure 2 ). The impeller body and the blades are integrally injection-molded into an impeller. The impeller with the blades arranged in a staggered manner can improve the diffusion ability of the oxygen-rich water body during operation. The connecting rings at both ends of the impeller with the blades arranged neatly and the impeller with the blades arranged in a staggered manner can be set to be mutually matched and combined according to needs.

[0026] The floating boat of the waterwheel type aerator is a boat-shaped structure with a closed upper panel. Installation holes 89 for connecting the main machine (power assembly) need to be provided around the upper panel 104 of the floating boat 87. The positions of the installation holes are equivalent to the deck 108 of the hull. The said deck 108 needs to be stronger than the hull. For example, the thickness of the common upper panel 104 of the floating boat is about 4 mm, and the thickness of the vertical plate 105 and the bottom plate is 3 mm. The deck needs to be 5 mm or more. During the blow molding process, local material shortage defects will occur at the joints of the upper panel, vertical plate and deck due to the entry of compressed air, which will affect the service life of the floating boat. In the present invention, a groove 88 is provided on the upper plane where the upper panel 104 of the floating boat is connected to the vertical plate 105, so that no material shortage will occur at the joint of the upper panel 104 and the vertical plate 105 of the floating boat, and the service life of the boat-shaped floating boat can be improved.

[0027] The blow molding method of the floating boat of the waterwheel type aerator, including a mold structure and a blow molding machine. The said mold includes an upper mold 109 and a lower mold 111 forming a set of molds. A convex mold 110 for generating a groove is made in the cavity of the upper mold 109. The lower mold 111 is set to the shape of the lower part of the deck 108, and the shape of the upper part of the deck 108 is made in the upper mold 109. The upper mold 109 is sleeved outside the lower mold 111. During work, the upper mold and the lower mold are closed towards each other. After cutting off the surplus material around the parison, they continue to be closed so that the deck is extruded into shape, and compressed air is blown in to make the hull inflated into shape. It should be noted that the upper mold 109 and the lower mold 111 mentioned in the present invention do not represent a limited orientation.

[0028] A waterwheel type aerator mainly includes a main floating boat 85, a bracket 95, a sub-floating boat 86, a power assembly, and an impeller. A connection position 93 for connecting the bracket is provided at one end of the main floating boat 85. The middle part of the bracket 95 is connected to the connection position 93 of the main floating boat. A sub-floating boat 86 is provided at each end of the bracket. The said power assembly is arranged on the main floating boat 85, and an impeller is arranged on the output shaft of the power assembly; the said power assembly includes a motor 82 connected to a reduction gearbox 83, and an impeller is arranged on the output shaft after the reduction of the reduction gearbox 83, or a permanent magnet synchronous motor 90 directly drives the impeller without reduction, including the motor housing arranged on a fixed seat 91 without rotation, the fixed seat 91 is connected to the floating boat, and the motor output shaft 81 drives the impeller to rotate; or the motor fixed shaft 106 is arranged on the fixed seat 91 without rotation, the fixed seat 91 is connected to the floating boat, and the motor housing drives the impeller to rotate. The said fixed shaft 106 is hollow, and the electric wire 107 extends out after being sealed inside the fixed shaft 106 to connect to the power supply.

[0029] The width (W) to length (L) ratio of the said main floating boat 85 is 1:5 - 1:8. The connection position between the main floating boat 85 and the bracket is connected to a connecting plate extending in the length direction at the upper part of the main floating boat. The connecting plate can be set to a bracket made of a square tube or a round tube.

[0030] The described powertrain is arranged above the main floating vessel on the side of the main floating vessel 85 that is closer to the connecting bracket 95 and is connected and fixed by the base 98 or the heightening member.

[0031] The described auxiliary floating vessel 86 is blow-molded, and a device connected to the bracket is embedded in the middle of the top of the auxiliary floating vessel 86. One end of the bracket 95 can be connected to an auxiliary floating vessel 86 with a connecting device embedded therein, and the connecting device and the bracket 95 are fastened with bolts.

[0032] The connecting device on the top of the described auxiliary floating vessel includes a connecting seat 6 formed by injection molding, which includes a bottom plate 61, an embedding body 65, and a supporting seat 62. The supporting seat 62 is arranged on the upper side of the bottom plate 61, and the embedding body 65 is arranged on the lower side of the bottom plate 61. The auxiliary floating vessel with the connecting seat 6 is blow-molded, and the blow mold is divided into a left cavity and a right cavity. One of the left cavity and the right cavity is set as the upper cavity 100 of the auxiliary floating vessel, and the other cavity is set as the lower cavity 102 of the auxiliary floating vessel. A placement position 101 is provided at the top of the upper cavity 100, and the connecting seat 6 formed by injection molding is pre-installed in the placement position; after the hot plastic blank enters the cavity, compressed air is blown in to expand the plastic blank to form and wrap the embedding body 65, and after cooling, it is combined with the auxiliary floating vessel into one body.

[0033] The described impeller includes an impeller body and blades. The impeller includes a single-group structure or a multi-group structure. The single-group structure is that a plurality of blades are arranged circumferentially on one impeller body. The multi-group structure blades can be divided into two-group structure, three-group structure, or more than three-group structure. The multi-group structure is that multiple groups of blades are arranged on one impeller body, and the multiple groups of blades are arranged in a staggered manner on the same impeller body. The blade stagger angle can be selected to be 8 - 12 degrees. For a three-group structure impeller, the preferred stagger angle is 10 degrees, and the blades are evenly distributed with six blades in each group. Two three-group structure impellers can be snap-connected to form a spiral impeller with completely evenly distributed blades.

[0034] The impeller body and the blades are integrally injection-molded into an impeller. The impeller body is provided with a snap-connection mechanism. The snap-connection mechanism includes that the snap-connection mechanisms of a single-group structure impeller and a two-group structure or multi-group structure impeller can be mutually matched, and more blades can be combined as needed.

[0035] The above embodiments are only the preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. An impeller of a waterwheel-type aerator, mainly comprising an impeller body, blades, and a connecting plate, and its characteristics include: The impeller body is provided with connecting rings at both ends, and no less than two protruding force transmission tenons are arranged on the connecting rings. The connecting plate is provided with a force transmission groove adapted to the force transmission tenon. After the connecting plate is connected to the connecting ring at the end of the impeller body, the force transmission tenon is fitted into the force transmission groove of the connecting plate. A connecting position and a connecting hole connected to the flange of the output shaft of the waterwheel-type aerator can be arranged on the outer side of the connecting plate; or a shaft matching hole is arranged in the impeller body, and spokes are arranged around the shaft matching hole to connect to the impeller body; the blades are arranged on the impeller body.

2. The impeller of a waterwheel-type aerator as claimed in claim 1, characterized in that: The blades are radially evenly distributed outside the impeller body, and the blades are axially parallel to the impeller body, with gaps between the blades; or adjacent blades at the connection ends of the blades and the impeller body are interconnected, and gaps are between adjacent blades at the non-connection ends.

3. An impeller of a waterwheel-type aerator, characterized in that: The impeller body is cylindrical, the blades are radially evenly distributed on the cylindrical surface of the cylindrical impeller body, the blades are axially arranged in parallel on the cylindrical surface, and there is a gap between adjacent blades to allow water to pass through when the impeller is working; circular connecting rings are provided at both ends of the impeller body, and the circular connecting rings are provided with force transmission tenons or force transmission grooves, or force transmission tenons and force transmission grooves are provided; the force transmission tenons or force transmission grooves can be adapted to the force transmission tenons or force transmission grooves provided on the connecting plate.

4. The impeller of a waterwheel aerator as claimed in claim 1, characterized in that: The blade is an angular blade with a reinforcing strip on the back, the ratio of the width of the blade working surface to the gap is 12:1-8:1, and the outer end of the blade is a scoop-shaped structure with an arc transition.

5. The impeller of a waterwheel aerator as claimed in claim 1, characterized in that: The diameters of the two ends of the impeller body are larger than the diameter of the middle part, and the impeller body is a stepped structure; the blades are axially arranged on the outer circle of the impeller body with the stepped structure, and the blades at both ends can be arranged at the steps.

6. A waterwheel-type aerator, mainly comprising: The floating body, power assembly and impeller are characterized in that the floating body is mainly composed of a main floating boat, two auxiliary floating boats and a bracket, one end of the main floating boat is provided with a connecting plate connected to the bracket, the middle part of the bracket is connected to the connecting plate of the main floating boat, and an auxiliary floating boat is provided at each end of the bracket; the power assembly is installed on the main floating boat, and the output shaft after deceleration drives the impeller to rotate and increase oxygen; or multiple floating boats are connected by the bracket and float on the water surface to form a floating body, and the power assembly is arranged on the floating body, and the output shaft after deceleration drives the transmission shaft, and the impeller is arranged on the transmission shaft; the power assembly includes a motor connected to a reduction box, and the output shaft after deceleration of the reduction box drives the impeller, or a low-speed permanent magnet motor does not use a reduction box, and the motor shaft directly drives the impeller.

7. A waterwheel-type aerator as claimed in claim 6, characterized in that: The width-to-length ratio of the main pontoon is 1:5-1:

8. The connection position between the main pontoon and the bracket is set at the upper part of the main pontoon and connected with a connecting plate extending in the length direction. The connecting plate can be set as a bracket made of a square tube or a round tube. The main pontoon and the connecting plate are blow-molded together.

8. A waterwheel-type aerator as claimed in claim 6, characterized in that: The auxiliary pontoon is blow-molded, and a device connected to the bracket is embedded in the middle of the top of the auxiliary pontoon. The two ends of the bracket are respectively connected to an auxiliary pontoon with a connecting device embedded, and the connecting device and the bracket are fastened with bolts; the connecting device on the top of the auxiliary pontoon includes a bottom plate, an inlay body, and a support seat, the support seat is arranged on the upper side of the bottom plate, and the inlay body is arranged on the lower side of the bottom plate. The auxiliary pontoon is blow-molded, and the injection-molded connecting device is pre-installed in the mold; after the hot plastic blank enters the cavity, compressed air is blown into the plastic blank to expand and wrap the inlay body, and after cooling, the connecting device and the auxiliary pontoon become one.

9. A floating boat for a waterwheel-type aerator, characterized in that the upper panel of the floating boat is a closed boat-shaped structure, and mounting holes for connecting to a main engine are arranged around the upper panel of the floating boat, and the positions of the mounting holes are equivalent to the deck of the hull, and the deck needs to be stronger than the hull. For example, the thickness of the upper panel of the commonly used floating boat is about 4 mm, the thickness of the vertical plate and the bottom plate can be 3 mm, and the deck needs to be 5 mm or more. During the blow molding process, the intersection of the upper panel, the vertical plate and the deck will produce local material shortage defects, which will affect the service life of the floating body. The present invention provides a groove on the upper plane where the upper panel of the floating body is connected to the vertical plate, so that the intersection of the upper panel of the floating boat and the vertical plate will not produce material shortage, which can improve the service life of the floating body.

10. An impeller of a waterwheel-type aerator as described in claim 1, characterized in that the impeller includes an impeller body and blades, the impeller includes a single-group structure or a multi-group structure, the multi-group structure blades can be divided into two groups of structures, three groups of structures or more than three groups of structures, each group of no less than three blades are staggered on the impeller body, and the impeller body and blades are integrally injection-molded into an impeller.

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