JPH0699187A - Aerator capable of blowout through plurality of hole parts different in pressure - Google Patents

Abstract

PURPOSE:To provide an aerator capable of respectively blowing out air in the upper limit through air blowout hole parts formed in a plurality of regions different in pressure difference. CONSTITUTION:An aerator is constituted of a structure wherein pressure difference is generated in water by movement of a blade part 1 provided in a rotary shaft and air is sucked and blown out by the pressure difference through hole parts 6 formed in water. The hole parts have a structure connected from underwater to the aquatic part by air passages 5, 5' fitted to the rotary shaft. A plurality of hole parts are formed in the regions different in pressure distribution generated by the rotated blade part. The aerator has a structure wherein air is supplied in the vicinities of the hole parts of the respective distribution regions through a plurality of independent air passages. While the partition 7 of the air passages in the vicinities of the blowout hole parts is formed into a structure wherein it is partitioned and continued from underwater to the length of at least water surface in lower limit, the partition is formed longer than the rising limit by means of the relation of suction force and dead weight of liquid. The suction force acts on the air passage weaker in pressure difference and raises the water level.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention allows a large amount of gas to be ejected by utilizing a pressure difference generated in a liquid by fully rotating a blade in the liquid and rotating the blade from a hole portion having a different pressure distribution. It is an aeration device that can eject air and that ejects multiple holes with different pressures for water treatment or science / food.

[0002]

[Prior art] Conventionally, there is a method of performing aeration by forcibly compressing gas with a blower or the like when blowing air into the septic tank, but there is a problem in terms of efficient aeration, and aeration by compression Whether the method is a piston method, a rotary method, or a diaphragm method, first of all, there is a problem in compressing the gas itself, which has the property of large elasticity, and especially to a deep area where water pressure is applied. However, there is also a problem in performing aeration by compressing from one end of a thin pipe, and it is pointed out that the efficiency is poor. Further, the piston system and the rotary system are systems with extremely low aeration efficiency because frictional heat is generated during the reversal or rotary motion of the piston system, resulting in energy loss.

[0003]

Therefore, there is an air suction type aerating device using a screw or the like by the applicant of the present invention. This is to use the rotation of a ship's screw or turbine impeller to forcibly generate a water flow in water in the axial direction, and use the flow velocity or vortex of the water flow generated in the axial direction to rotate the rotating shaft. This is to try to suck air from the end part of the compressor in the opposite direction to the conventional compressor.According to this method, the gas with large elasticity stretches in the opposite direction and is sucked into the water while at the same time depending on the flow velocity of the water flow. This is an epoch-making aeration method that can make bubbles smaller, and originally there is a method of ejecting air from the end of the rotating shaft by a foreign patent.

Further, the applicant of the present invention has filed a "blade surface ejection type" aeration device technology / patent application 62 as a new method of air ejection different from the screw type aeration device for ejecting air from the conventional rotary shaft end. -016634, 62-1
11366 and 2-254693. As a new air ejection method, there is a technology / patent application No. Hei 2-417929 of the "partition structure utilizing method", but a prototype machine was commercialized for commercialization by the applicant and the company owned by the same applicant. When we manufactured and measured the performance, we compared the amount of air sent when sucking air by unifying the motor output with "Hitachi Kiden's spiral screw type aerator" which has the highest performance at this stage, the former blade Surface ejection is 4 compared to conventional
A performance of about 4% was recorded, and it was found that the latter type using a partition structure improved performance by about 20% compared with the conventional type.
However, the inventors of the present invention prototyped a patent application No. Hei 2-254693, which was prototyped on the basis of a different principle, and measured the performance. --- It has the characteristic that the thick rotary shaft has a pre-throttled structure, and the holes are formed at two locations where the pressure distribution is different to increase, and the tip shaft core portion of the rotary shaft, which is the same location as in the past, is used. At the same time as forming a hole, the "blade surface ejection method" and "partition structure utilization method" with different pressure distribution
It was intended to eject air in two stages by means of holes that were formed at locations such as the above, and holes that were formed at locations with different pressure distributions were used to measure air flow rate with this prototype. However, it resulted in no performance. Therefore, as a result of struggling with various causes, the hole formed at the tip of the rotating shaft was accidentally blocked as in the conventional case. In Japanese Patent Application No. Heisei 3-181918, "Aeration device excellent in air feeding capacity (large diameter Tube type) ”, which is almost three times the conventional 27
It was decided to measure a 1% explosive air ejection amount.
Therefore, as a result of an analysis based on this by the applicant, when a plurality of holes are formed at different pressure distribution states, when the rotation speed is gradually increased, the blade portion among the plurality of holes is formed. When the suction force begins to work on the hole portion that ejects air even at low speed rotation due to the rotation of the water, water is sucked by the pressure difference from the hole portion that can eject air at high speed rotation, and each of the holes We found out that a phenomenon of water circulation like a pump occurred between the parts.

[0005]

In view of the above, the present invention is intended to maximize the respective suction forces acting on a plurality of holes having different pressure differences so that air is efficiently ejected from the respective holes. The structure of the present invention will be described in detail below with reference to the drawings.

In the aerating device having a screw type or water wheel type impeller for stirring and aerating gas while supplying gas from the air passage by utilizing the negative pressure generated in the liquid, the rotary shaft 1
The hole 6 is attached to the rotary shaft 11 as a structure in which a pressure difference is generated in water by the movement of the blade part 1 provided in 1 and air is sucked and ejected from the hole 6 formed in the water by the pressure difference. As a structure that connects from underwater to above the water by an air passage 5, a plurality of holes 6 are formed in regions where the pressure distribution generated by the rotating blades 1 is different, and the holes 6 formed in each distribution region eject air. As the structure in which the minimum rotation speeds are different, and the structure is such that the air passages 5 are supplied by a plurality of independent air passages 5 in the vicinity of the holes 6 in each distribution area, the partition between the air passages 5 in the vicinity of the ejection holes 6 is at least the To the length above the surface of the water, the partition 7 is separated from the rising limit point due to the relationship between the suction force that works in the air passage 5 with a weaker pressure difference to raise the water level and the liquid's own weight. It characterized in that 7 to the long form.

A plurality of air passages 5 for ejecting air from the holes 6 having different pressure distributions are formed completely independently and are attached to the rotary shaft 11.
As a structure which does not coincide with each other in the middle, a structure may be adopted in which the pressure difference of the one that first generates the suction force of the plurality of air passages 5 and 5 is not transmitted to another air passage 5 .

[0008]

[Operation] The present invention is a patent application by the present applicant
The conventional method of ejecting air from the end of the rotary shaft 11 as in 54693 and the method of the present applicant are used in combination.
-Become inconvenient even if you use the air jet method of the "blade surface jet type" aerator such as No. -11166 or the air jet method of Japanese Patent Application No. Hei 2-417929 "Partition structure utilization method". Is an aeration device. The operation will be described based on the experimental results of the present invention. The present invention is to generate a difference in the flow of liquid by the rotation of the blade portion 1, that is, to generate a pressure difference (decompression) in water,
This pressure difference is used as a suction force for ejecting air to act in a specific pipe to eject air. According to the present invention, a plurality of holes 6 are formed at different pressure distributions in the vicinity of the blade portion 1 such as a screw or a turbine blade, and air is ejected from both of them to eliminate the above-mentioned problems. It is a solution. In addition, in order to prevent water droplets from rising from the air passage 5 ', which has a weak pressure due to the rotation of the screw, a water drop back-up prevention valve is formed near the water surface above the air passage 5'in the atmosphere. Is also good.

In other words, the air ejection holes 6 formed in the regions having different pressure differences have different degrees of air ejection due to the difference in the depressurizing force applied, and this can be confirmed from the difference in the rotation range where the air begins to be ejected. A partition 7 is formed so as to prevent the solution from flowing between the plurality of holes 6 formed at the locations where the pressure distribution is different, and the air passages 5 and 5'are separated from each other. Furthermore, when the air passages 5 coincide with each other inside the pipe body 4 from underwater, the suction force exerted on the one air passage 5 causes the other air passage 5 to move.
Even if the water level in the pipe of ｀ rises, a sufficient amount of partition 7 is extended above the water level, which is the suction force acting on one air passage 5 and the liquid filled in the other air passage 5 ″. It is characterized in that the partition 7 is formed longer than the upper limit point due to its own weight.

Further, according to the second aspect, the plurality of air passages 5 and 5'for ejecting air from the holes 6 having different pressure distributions are completely independently formed to form the regions having different pressure differences. By connecting a plurality of different air passages 5 and 5'to the air ejection hole portion 6 respectively, the above-mentioned problem can be solved more completely. The plurality of air passages 5 and 5'attached to the rotary shaft 11 are in the middle. By adopting a structure that does not coincide with each other, the pressure difference of the one generating the suction force among the plurality of air passages 5 and 5'is not transmitted to the other air passage 5 '. As a result, the blade part 1 is rotated at a specific rotation.
The air ejection holes 6 and the air passages 5 and 5'formed in the areas where the pressure difference when moving is different from each other surely have different air ejection amounts due to the difference in the depressurizing force applied. Air can be ejected from the portion 6, and the pressure distribution area generated by the blade portion 1 can be fully utilized to aerate a larger amount of air.

As described above, according to the present invention, the air jet holes 6 are formed in the rotary shaft 11 on the rear surface 3 side, or the blade 1 rear surface 3 is utilized by utilizing the flow velocity of the fast water flowing around the blade portion 1. Alternatively, the ejection hole portion 6 may be formed on the rear edge portion, or the blade portion 1
While forming a partition on the back surface 3 or the abdominal surface 2, the rotating shaft 1
By forming the jet hole portion 6 in 1, the pressure difference is maximized while the flow velocity of the fast water flow is fully utilized to increase the jet amount of air, and moreover, the rotary shaft 11 generated by the blade portion 1 The air pressure is jetted from the hole 6 formed at another position by further utilizing the pressure reduction difference acting near the central vortex of the swirling water flow generated in the direction.

[0012]

【Example】

FIG. 1 is a sectional view of a screw portion showing a first embodiment of the present invention. This figure is

According to the present invention, the hole 6 is formed on the axis of the rotary shaft 11, and another hole 6 is a place other than the axis, for example, where pressure distribution is different. As shown in the figure, the rotary shaft 1
It may be formed in the vicinity of the blade portion 1 on the side surface portion of No. 1. Here, the above-mentioned Japanese Patent Application No. 62-016634 by the present applicant,
No. 62-111366 and the like, the air jet method of the "blade surface jet type" aerator, and the patent application No. Hei 2-417929.
There is no inconvenience even if it is used in combination with an air ejection method such as the "partition structure utilization method" or the "aeration device (large-diameter pipe method) having an excellent air-sending ability" of Japanese Patent Application No. 3-181918. In some cases, the air passages 5 and 5'may be divided by the partition 7 as in this embodiment so that the air is ejected from the plurality of holes 6 having different pressure distributions only by using the method by the applicant. Further, the fixing method of the present apparatus is based on only the motor section 10, but the rotating shaft may be supported by bearings and fixed. Further, for example, the power from the motor unit 10 may be transmitted to the rotary shaft 11 by a universal joint such as a spring. By the way, the present invention may have any shape as long as the blade portion 1 has a spiral shape or a blade shape as long as it produces a water flow or a pressure difference, and the number of blade portions 1 may be any number.

[0013]

FIG. 2 is a sectional perspective view of an aeration device showing a second embodiment of the present invention. This figure is

According to a second aspect of the present invention, roughly three types of pressure distribution regions are indicated by dotted lines A to C. Pressure distribution area A
Indicates the area where the maximum pressure is generated by the blade surface, B is the area where the pressure is generated at the root of the blade surface, and C is the area where the swirl pressure is generated due to the water flow generated on the blade surface. It was As a result, a plurality of areas where the holes 6 are formed in the areas A to C are used together. The greatest feature of this embodiment is that the plurality of ejection hole portions 6 are partitioned from each other, and the plurality of air passages 5 and 5'are completely partitioned to extend to the air inlet 8. Therefore, there are a plurality of air inlets 8. Further, the traveling direction of the water flow may be the same as the traveling direction of the ship's screw, or may be the opposite direction to the traveling direction.

By the way, the present invention may be equipped with a D tube. In this case, as an effect of the D tube, the flow velocity of the water flow can be increased and the air can be made finer. Further, according to the present invention, the blade portion 1 for the purpose of performing aeration as in each embodiment is provided on the rotating shaft 11 while further extending the D tube in the depth direction for deep aeration, and at the same time, the rotation in the D tube is further performed. For the purpose of transferring the air or water flow by extending the shaft 11 in the depth direction, a specialized spiral blade part 1 or the like may be provided to perform aeration and at the same time to transfer dissolved oxygen water to the water bottom, or aeration It is also possible to provide a new transfer tube near the water jet of the screw of the apparatus, and further to bring another rotating shaft 11 close to transfer the liquid by the spiral. As described above, the liquid transfer method using the spiral is already known.

[0015]

The present invention is intended to eject air to the maximum extent from the air ejection holes formed in regions having different pressure differences, and therefore the difference in decompression force generated by the rotation of the blades. A partition is formed between a plurality of holes formed at locations where air is blown out from each other to prevent the solution from flowing into each other, so that the air passages are separated from each other completely or in part. As a result, the area where the pressure difference is generated in the water due to the rotation of the blades is fully utilized, and the air ejection efficiency is maximized.
Moreover, the above-mentioned patent application 62-016634 by the present applicant.
No. 62-1111366, etc., "Vane surface ejection method"
Air blowing method of aerator of Japanese Patent No. 2-4179
There is no inconvenience even if it is used in combination with an air ejection method such as No. 29 "partition structure utilization method" or "aeration device (large diameter tube method) excellent in air feeding ability" of Japanese Patent Application No. 3-181918. In some cases, the air passage may be divided by the partition as in this embodiment so that the air is ejected from the plurality of holes having different pressure distributions only by using the plurality of application methods by the applicant.

By the way, the present invention can be used for transporting some gas at the same time when a large amount of bubbles are generated, but due to the structure of this device, it can be used as it is for transporting liquid or anything. , For example, it may be one that breaks and stirs the snow in a snow drift mine by the action of bubbles at the same time as transferring, or as an air containment technology that separates the hull and the liquid surface with air, which is the main technology of a cargo ship for high-speed transportation. The screw of this aeration device can be used as it is.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional perspective view showing a second embodiment of the present invention. Areas A, B, C-(different pressure distribution), 1--blade, 2--belly, 3--back, 4, 4 "tube, 5, 5" air passage, 6-hole, 7 --- Partition, 8-- inlet, 9- joint section, 10- motor section, 11- rotating shaft

Claims (2)

[Claims] 1. An aerator having a screw-type or water-wheel type impeller that agitates and aerates gas while supplying gas from an air passage by using a negative pressure generated in a liquid, by moving a blade portion provided on a rotating shaft. Generate a pressure difference in water,
As a structure for sucking and ejecting air from the hole formed in the water due to the pressure difference, the hole is a structure connecting from underwater to above the water by an air passage attached to the rotating shaft. A plurality of holes are formed in different areas, and the holes formed in the respective distribution areas have different minimum rotation speeds for ejecting air. As a structure that is supplied by an air passage, the partition between the air passages in the vicinity of the ejection hole portion is a structure that keeps partitioning from a minimum of water to a length equal to or higher than the water surface, while the working water level is applied to the air passage with the weaker pressure difference. An aeration apparatus for ejecting a plurality of holes having different pressures, characterized in that the partition is formed longer than a rising limit point due to the relationship between the suction force to be raised and the weight of the liquid. 2. A structure in which a plurality of air passages for ejecting air from the holes having different pressure distributions are formed completely independently of each other, and the plurality of air passages attached to the rotary shaft do not coincide on the way. The aeration device for ejecting a plurality of holes having different pressures according to claim 1, wherein the pressure difference in which one of the plurality of air passages generates suction force is not transmitted to another air passage.