JP2631920B2 - Aerator for aquarium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerator for a water tank.

[0002]

2. Description of the Related Art As shown in FIG. 3, in a fishing port or the like, a water tank 1 may be provided on a quay W in order to temporarily store seafood and the like while agitating seaweed. In this water tank 1, seawater is pumped up by a water pump 2 and dropped into the water tank 1, so that surplus water is appropriately drained into the sea. A fish cage is provided inside the fishing boat, and sea water is supplied to the fish cage in a similar manner.
In such a conventional aquarium, fresh seawater is always supplied, and it has been considered that it is not particularly necessary to adjust oxygen in the water.

[0003] In a so-called live fish transport vehicle that transports live fish and shellfish by land, water is not exchanged for a long time, so that oxygen, air and the like are supplied from a cylinder or a pump in order to keep the oxygen concentration in the water at a certain level or more. It blows out into the water in the aquarium. However, the supply amounts of oxygen and air from the cylinder and the pump are not adjusted depending on fish species and the like, but are fixed.

[0004]

However, as research on aquatic organisms is advanced, it is preferable that shrimp and burrows increase the amount of oxygen in water, and octopus and fry reduce the amount of oxygen in water. In addition, it was found that adjusting the amount of oxygen in water according to the type of fish and shellfish is advantageous for its storage and growth. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an aeration device for a water tank, which is capable of adjusting the amount of oxygen supplied to water with a simple and inexpensive configuration. And

[0005]

According to the present invention, an aerator for mixing water into a water tank according to the present invention, as shown in FIG.
Flow path 5 of T-joint 5 interposed in pipe 3 for sending water to
A tapered nozzle 6 is inserted into the nozzle a, and air is ejected from the branch flow path 5b into the water flow by an ejecting action of the water flow passing through the tapered nozzle 6, and the amount of intake air is supplied to the branch flow path 5b. It is required that an adjustment valve 7 for adjusting the pressure be provided.

Specifically, a T-shaped joint 5 interposed in a pipe 3 for sending water from the water pump 2 to the water tank 1, a tapered nozzle 6 inserted into a straight flow path 5 a of the T-shaped joint 5, Formed between the outer periphery of the nozzle 6 and the peripheral surface of the straight flow path 5a;
An annular back pressure space 5f is provided to connect the branch flow path 5b of the U-shaped joint 5 to a portion of the straight flow path 5a downstream of the nozzle 6 so that the flow of water flowing in the straight flow path 5a in the forward direction of the nozzle 6 is reduced. The branch passage 5b and the back pressure space 5 are externally provided by an eject action.
f, the air mixing device is configured to mix air into the water flow via the f., and provided with an adjusting valve 7 for adjusting the amount of air mixed into the water flow in the branch passage 5b. A stepped portion 6b is formed on the outer peripheral surface of the diameter portion 6a,
The nozzle 6 is inserted from the upstream side of the straight flow passage 5a with the large diameter portion 6a of the nozzle 6 facing upstream and the small diameter portion 6c facing downstream, and is used for receiving a pipe end on the upstream side of the straight flow passage 5a. The stepped portion 6b of the nozzle 6 is received and fixed to the stepped portion 5c, and the valve case 71 of the adjustment valve 7 is fitted and fixed in the branch flow path 5b, and the valve ports communicate with each other in the valve case 71 in order. 71a, valve chamber 7
1b and a female screw hole 71c are coaxially arranged, and a valve port 71a is provided at an inner end of an adjusting screw 72 screwed into the female screw hole 71c.
A valve 72e is formed on the periphery of the valve seat 71d so as to be in contact with or separate from the valve seat 71d. An operation knob 72b located outside the valve case 71 is formed on the outer end of the adjustment screw 72.
1b and an air passage 72 for communicating the outside of the valve case 71
f is formed.

[0007]

When water is pumped by the water pump 2 from one end of the straight flow path 5a of the T-joint 5, the flow velocity of the water is increased by passing through the nozzle 6, and this water flow is ejected from the branch flow path 5b. Air is inhaled. This intake air amount is adjusted by rotating the operation knob 72b to advance and retreat, thereby adjusting the distance between the valve 72e connected to the operation knob 72b and the valve seat 71d. In addition, it is a simple structure in which the nozzle 6 and the adjusting valve 7 are simply fitted to the T-joint 5, and in particular, the T-joint 5 can be a commercially available one without any processing and can be inexpensive. . Further, the adjusting valve 7 is composed of an adjusting screw 72 formed integrally with an operation knob 72 b and a valve 72 e connected thereto, and a valve case 71.
It is a simple configuration made up of individual parts and can be made more inexpensive.

[0008]

In FIG. 2, seawater is pumped from the sea by a water pump 2 into a water tank 1 provided on a quay wall W, and the seawater is dispersed and supplied to the bottom of the water tank 1. An aerator 4 is interposed in a pipe 3 from the water pump 2 to the water tank 1.

In FIG. 1, the air mixing device 4 of the present invention comprises a commercially available T-joint 5 made of synthetic resin, a nozzle 6 inserted in a straight passage 5a thereof, and a tip end of a branch passage 5b of the T-joint 5. And an adjustment valve 7 fitted and fixed to the portion. The commercially available synthetic resin T-joint 5 is always provided with steps 5c to 5e for receiving the pipe ends, and the nozzle 6 can accurately utilize the step 5c on the upstream side of the straight flow path 5a. Position and fix. That is, a stepped portion 6b is formed on the outer peripheral surface of the large diameter portion 6a of the nozzle 6, and the large diameter portion 6a of the nozzle 6 is directed to the upstream side and the small diameter portion 6c is directed to the downstream side.
The nozzle 6 is accurately positioned by receiving the stepped portion 6b of the nozzle 6 in the stepped portion 5c for receiving the pipe end on the upstream side of the straight flow path 5a. And fix it.

The outer peripheral surface 6d of the nozzle 6 is formed as a tapered surface like the inner peripheral surface 6e.
An annular back pressure space 5f communicating between the branch flow path 5b and the peripheral surface of the straight flow path 5a is formed between the branch flow path 5b and the portion of the straight flow path 5a downstream of the nozzle 6 (water tank side portion). The adjusting valve 7 includes a valve case 71 and an adjusting screw 72. The outer peripheral surface of the valve case 71 is formed as a stepped cylindrical surface, and its small diameter portion is fitted in the branch channel 5b, and is fixed by, for example, bonding with an adhesive.

In the valve case 71, a valve port 71a, a valve chamber 71b, and a female screw hole 71c communicating with each other are formed coaxially, and a peripheral portion of the valve port 71a on the valve chamber 71b side is tapered. The valve seat 71d is formed by cornering.

The adjusting screw 72 includes a male screw portion 72a which is screwably engaged with a female screw hole 71c of the valve case 71, an operation knob 72b which is continuous with the outside of the valve case 71, and
A seal comprising a guide shaft portion 72c which is continuous with the male screw portion 72a on the valve chamber 71b side and is rotatably and reciprocally fitted in the valve chamber 71b, and an O-ring which is externally fitted on the outer peripheral surface of the guide shaft portion 72c. There is provided a member 72d, and a valve 72e protruding from the guide shaft 72c so as to face the valve seat 71d. A T-shaped air passage 72f is formed in the adjusting screw 72 from the end surface of the operation knob 72b to the peripheral surface of the valve 72e.

When seawater is fed into the aerator 4 by the water pump 2, the flow velocity of the seawater is increased by passing through the nozzle 6, and air is sucked from the branch flow path 5b by the ejecting action of the water flow. This intake air amount is controlled by the operation knob 7.
By adjusting the distance between the valve element 72e and the valve seat 71d connected to the operation knob 72b by adjusting the rotation of the 2b to advance and retreat.

In the above embodiment, the seawater is pumped from the sea. However, when the seawater in the water tank is pumped up and circulated again to the water tank, the above-mentioned water is returned from the pump to the water tank in the water channel. The same effect can be obtained by interposing the aerator 4. In the above embodiment, the air passage 72f is formed inside the adjusting screw 72, but may be provided in a groove shape along the outer peripheral surface of the adjusting screw 72.

[0015]

As described above, the aeration device of the present invention simply has a commercially available T-shaped joint, a nozzle inserted therein, and an adjusting valve, and can be manufactured in a simple and inexpensive manner. Further, by operating the adjusting valve, the mixing ratio of air in water can be easily adjusted. As a result, an appropriate amount of oxygen can be supplied into water according to the type of fish and shellfish stored in the aquarium, and an optimal environment for fish and shellfish can be created.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention.

FIG. 2 is a schematic diagram of an aquarium facility showing an example of use of an embodiment of the present invention.

FIG. 3 is a schematic view of a conventional water tank facility.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water tank 2 Water pump 3 Piping 4 Air mixing device 5 T-joint 5a Straight flow path 5b Branch flow path 5c Step 5f Back pressure space 6 Nozzle 6a Large diameter section 6b Stepped section 6c Small diameter section 7 Adjusting valve 71 Valve case 71a Valve port 71b Valve chamber 71c Female screw hole 71d Valve seat 72 Adjusting screw 72b Operation knob 72e Valve 72f Air passage

Claims (1)

(57) [Claims] 1. A pipe 3 for sending water from a water pump 2 to a water tank 1.
Nozzle and T-joint 5 is interposed, tapered inserted into the straight channel 5a of the T-shaped joint 5 to
Formed between the outer periphery of the nozzle 6 and the peripheral surface of the straight flow path 5a.
The branch flow path 5b of the T-shaped joint 5 is connected to the nozzle of the straight flow path 5a.
Annular back pressure space 5f communicating with a portion downstream of 6
To eject the water flowing in the straight flow path 5a in the forward direction of the nozzle 6.
Through the branch channel 5b and the back pressure space 5f from the outside
To mix air into the water flow and adjust the amount of air mixed into the water flow into the branch flow path 5b.
A stepped portion 6b is formed on the outer peripheral surface of the large diameter portion 6a of the nozzle 6 in the air mixing device for the water tank provided with the valve 7.
And a large diameter portion 6a of the nozzle 6 on the upstream side, downstream side small-diameter portion 6c
Nozzle 6 from the upstream side of the straight flow path 5a
The step 5c for receiving the pipe end on the upstream side of the straight flow path 5a has a nose.
The stepped portion 6b of the valve 6 is received and fixed, and the valve case 71 of the adjustment valve 7 is fitted and fixed in the branch flow path 5b.
And a valve port 71a and a valve chamber communicating with each other in order within the valve case 71.
71b and the female screw hole 71c are coaxially arranged, and a valve is provided at the inner end of the adjusting screw 72 screwed into the female screw hole 71c.
A valve that comes into contact with and separates from a valve seat 71d formed around the opening 71a.
72e is formed, and an outer end of the adjusting screw 72 is
A work knob 72b is formed, and the adjustment screw 72 connects the valve chamber 71b and the outside of the valve case 71.
An air mixing device for a water tank, wherein an air passage 72f through which the air is passed is formed .