JPH0615461U - Bubble generator - Google Patents

Abstract

(57) [Abstract] [Purpose] The objective is to operate the bubble generator without disposing a motor as a drive source in water. A drive source is installed on the water, and a rotary shaft of an impeller incorporated in a bubble generator main body disposed in the water and an output shaft of the drive source are connected by a flexible shaft. There is no need to dispose the power cord to the motor underwater, and there is no risk of leakage.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bubble generating device used to mix air into water in aquaculture ponds and the like.

[0002]

[Prior art]

 The conventional bubble generator has a structure in which the rotating shaft of an impeller is directly attached to the output shaft of a motor that serves as a drive source, and the motor is driven by supplying electricity to the motor from a water source through a power cord.

[0003]

[Problems to be solved by the device]

 The above-mentioned conventional technique has the following problems. First of all, the motor, which is the drive source, is also submerged in the water, so it is necessary to take measures to waterproof the motor, such as using an underwater motor, and to pay close attention to maintenance. In addition, the electric cord had to be installed in the water, and there was a risk that electricity would flow into the water due to electrical leakage and the fish would be electrocuted. Secondly, since the electric motor is used, the equipment cannot be operated in a place without a power source, and the place of use is limited. Thirdly, the bubble generator could not be easily moved to the work place due to the long length of the electrical cord and its fragile nature.

[0004]

[Means for Solving the Problems]

 In the bubble generating device of the present invention, an impeller is installed in a casing having a water intake hole, an intake port, and a discharge port, a tip of a flexible shaft is attached to a rotating shaft of the impeller, and a base end of the flexible shaft is installed above water. It is attached to the output shaft of a drive source, and one end of an intake pipe having a length reaching above water is attached to the intake port. According to the invention of claim 2, the drive source is an engine, and the device can be operated even in a place without a power source.

[0005]

[Action]

 The rotation of the output shaft of the drive source installed on the water is transmitted to the impeller in the water via the flexible shaft, and the impeller rotates.The rotation of the impeller causes the water sucked from the water intake hole to suck the air sucked from the intake port. It is mixed and discharged into the water from the discharge port by the centrifugal force generated by the rotating force of the impeller. Since the device is driven without disposing a long electric cord in water, the first and third problems described above are solved. Further, if the drive source is an engine, no power supply is required, so the second problem is solved.

[0006]

【Example】

 In FIG. 1, an engine 2 serving as a drive source is placed on a ship 1, and a base end of a flexible shaft 3 is attached to an output shaft of the engine 2. The flexible shaft 3 is freely rotatably fitted in a flexible hose 4, and its tip is attached to the bubble generator main body A. The bubble generator main body A has an impeller 6 mounted in a casing 5, and the casing 5 comprises a casing main body 7, a cover 8 and a bottom plate 9. Here, the casing main body 7 has a flat spiral shape, one side thereof is formed into a cylindrical shape, and the opening thereof serves as the discharge port 10.

The cover 8 has a circular shape in a plan view, and is fixed to the casing main body 7 via a bolt 11 at a peripheral edge portion. The central portion of the cover 8 extends upward as a tubular portion 8a, the rotary shaft 6a of the impeller 6 is supported by a bearing inside the tubular portion 8a, and a seal is provided on the outer peripheral portion of the rotary shaft 6a. 12 is mounted, and a collar 13 is mounted between the lower end surface of the seal 12 and the upper end surface of the boss portion of the impeller. The tip end of the flexible shaft 3 is attached to the rotary shaft 6a. Reference numeral 14 in the drawing denotes a hose gland that detachably connects the tubular portion 8a of the cover 8 and the lower end fitting of the flexible hose 4.

The bottom plate 9 is disc-shaped, and an annular step portion that fits into the casing body is formed on the peripheral edge portion thereof, and is fixed to the casing body 7 by a bolt 15 at the step portion. The central portion of the bottom plate 9 has a tubular shape and extends downward. The opening of the bottom plate 9 serves as an intake port 16. The intake port 16 is provided with a base end of an intake pipe 17. The intake pipe 17 has such a length as to reach the surface of the water, and a float 18 is attached to the tip of the intake pipe 17 so that the end of the intake pipe 17 always projects above the water. Further, a large number of water absorption holes 19 are formed in the bottom plate 9.

A cylindrical frame body 20 is disposed below the bottom plate 9, and an insertion hole 21 for the intake pipe 17 and a large number of through holes 22 are formed in the frame body 20. A substrate 23 is disposed below the frame body 20, and the frame body 20 is sandwiched between the bottom plate 9 and the substrate 23 and fixed with bolts 24.

In this embodiment, when the engine 2 is driven, its rotational force is transmitted to the rotary shaft 6 a of the impeller 6 via the flexible shaft 3 and the impeller 6 rotates. The water in the pond is sucked by this rotating force and flows into the casing 5 through the through hole 22 and the water absorbing hole 19. Further, air in the atmosphere flows into the casing 5 through the intake pipe 17 and the intake port 16, is mixed with water, and is discharged from the discharge port 10.

Although the engine is used as the drive source in the above embodiment, a motor may be used. The location of the drive source may be on the pond or on the pond.

[0012]

[Effect of device]

 According to this invention, since the drive source is arranged on the water and the rotating force is transmitted to the impeller underwater by the flexible shaft, it is not necessary to arrange the electric cord underwater. Therefore, there is no need to consider waterproofing, such as using an underwater motor, and maintenance and inspection are intended, and there is no risk of electrical leakage, so fish will not be electrocuted. Further, since the flexible shaft is unlikely to be damaged unlike an electric cord, there is no possibility of damage to the device due to work such as movement, and the device can be made strong and durable. Therefore, it is possible to easily perform work such as changing or moving the work place. Furthermore, if an engine is used as a drive source, it will be completely free from electric operation on the water, there will be no danger of electric shock to the worker, and safety will be improved, and it can be used even in a place without a power supply device.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a front view in which a part of the main body of the bubble generator is also shown.

[Explanation of symbols]

 2 engine 3 flexible shaft 5 casing 6 impeller 7 casing body 8 cover 9 bottom plate 10 discharge port 16 intake port 19 water absorption hole A bubble generator main body

Claims (2)

[Scope of utility model registration request] 1. A drive in which an impeller is mounted in a casing having a water intake hole, an intake port, and a discharge port, a distal end of a flexible shaft is attached to a rotary shaft of the impeller, and a proximal end of the flexible shaft is installed above water. A bubble generator attached to the output shaft of the source, and one end of an intake pipe having a length reaching above water is attached to the intake port. 2. The bubble generator according to claim 1, wherein the drive source is an engine.