JP3168041U - Atmospheric pressure reducing device - Google Patents

Abstract

[PROBLEMS] To reduce atmospheric pressure by using the negative suction pressure of a circulating water pump in an ornamental tank, taking in oxygen in the atmosphere without causing cavitation in the pump, etc., and effectively maintaining long-term water quality in the tank. Providing equipment. The water discharged from the appreciation water tank 17 returns to the appreciation water tank 17 from the circulation water return pipe 7 through the circulation pump 11 and the filter 13 through the circulation water feed pipe 12. A water pipe inlet union 5 for sucking air is provided in the middle of the circulating water return pipe 7. Air is supplied from the container 1 to the water pipe inlet union 5 through the connecting tube 8. The container 1 is provided with an inlet valve 3 and an outlet valve 4 for reducing the pressure by the expansion and expansion action. 9 is connected to the connection portion of the outlet valve cover 23 of the container 1, and the air mixing portion water pipe 6 and the container 1 are integrally formed. [Selection] Figure 1

Description

  The present invention relates to the use of air to maintain the water quality of an ornamental aquarium.

  The cause of water pollution in the ornamental aquarium is mainly caused by uneaten food from aquatic organisms such as tropical fish, excrement, and waste of aquatic plants that are bred in both seawater and freshwater aquariums.

There are two types of water pollution: physical and organic pollution, and maintaining the water quality in conventional ornamental water tanks uses a filter to physically and organically maintain the water quality. The treatment of organic matter such as food leftovers and excreta from aquatic organisms is harmful due to the biooxidative degradation chain action by various aerobic beneficial bacteria, genus Nitrosonas and Nitrobacter, from the air in nature to the aquarium. The organic matter is processed by the bacterial oxidative degradation chain from the ammonia to the harmful nitrite and from the harmful nitrite to the harmless nitrate by bacteria.

All aerobic bacteria take in free oxygen and oxygen molecules floating in the water and perform biofiltration of the oxidative degradation chain by oxidation. In order to promote the oxidative degradation chain, it is necessary to grow and activate bacteria, and as a breeding place for bacteria, oxygen is mainly used in the filter medium in the filter and in the state of extremely small bubbles that are close to free oxygen in the water tank. Supply is important. For the decomposition of organic matter, oxygen is necessary and important for performing an aerobic nitrification reaction instead of nitric acid.

As a problem of biological oxidative degradation chain filtration, it becomes a harmless nitrate at the final stage of oxidative degradation chain, but when this reaches a residual concentration of 30 mg / liter, there is a problem of causing adverse effects on the aquatic organisms by inhibiting growth and immunity. In order to protect aquatic organisms, aquarium enthusiasts had the drawback of requiring labor and time to manually change and discharge about one-third of the water in the tank to the outside of the tank for dilution.

It is said that facultative anaerobic organisms that have a different effect on the above-mentioned bacteria, denitrifying facultative anaerobes, and some bacteria float in the atmosphere, and for metabolic systems using inorganic nitrogen compounds, catabolic nitrate reduction and anabolic There are two types of nitrate reduction, but denitrification reaction that breathes oxygen under oxygen-rich conditions and releases nitrate, nitrous oxide, nitrogen, etc. using nitrate as the final electron acceptor in the hypoxic region I do. It can be expected to reduce the frequency of water change by reducing nitrate accumulated as the final metabolite of the oxidative degradation chain by organic bacteria to nitrogen using denitrifying facultative anaerobes.

As a device for supplying oxygen to the above-mentioned aerobic bacteria and aquatic organisms, various devices have been devised and put on the market using air-powered A-pumps, airstone, etc., and resin to make minute bubbles. The bubbles are large and the rise is quick and the dissolved rate of oxygen in water is poor.

As an improvement measure, there is a method for taking oxygen into the ornamental water tank of Japanese Patent Publication No. 2005-14383. The negative pressure in the circulating water return pipe of the circulating water pump attached to the water tank is used to directly take in the outside air and to stir with the rotary gear of the pump. It is a malfunction and dangerous cavitation (cavity phenomenon) to cause the pump to draw outside air with external pressure directly into the pump using the negative pressure in the return pipe of the circulating water and suck the flowing water mixed with bubbles. (Phenomenon that creates a vortex near the place where the cross-section and direction of flowing water changes, causing vortices, causing vibration and noise in hydraulic machines such as pumps, screws, propellers, etc., causing wings and pump failures.) Unusable due to problems.

Japanese Patent Laid-Open No. 2005-14383

Encyclopedia Mypedia Anaerobic Bacteria

Source Free encyclopedia Wikipedia facultative anaerobe

  The problem to be solved is to supply and utilize oxygen in the atmosphere for the growth and activity of bacteria that propagate in the filter medium in the aquarium and the filter. The point is to use the oxygen in the atmosphere by controlling the cavitation phenomenon that occurs when the oxygen in the atmosphere is taken in by using the negative pressure in the return pipe of the circulating water pump for the filter attached to the water tank.

  In the present invention, a two-stage pressure reducing valve is installed at the inlet and outlet of a container for reducing the atmospheric pressure, and the tube connecting portion of this outlet and the tube connecting portion of the circulating water return water pipe are connected to the tube. Connected with the negative pressure inside the container to reduce the atmospheric pressure using the negative pressure in the circulating water return water pipe, the container's atmospheric intake port, into the negative pressure container At this inlet valve that sucks in the atmosphere, the atmosphere is throttled and depressurized by the expansion action of the throttle, and the atmosphere mixing part attached to the circulating water return pipe by the valve installed at the outlet of the container The main feature is that it is sucked in by the negative pressure in the connecting tube of the water pipe and decompressed in the second stage.

The air in the above-described state where there is no pressure is not injected into the negative pressure of the circulating water, but the air that is sucked into the negative pressure and has no pressure in the water pipe becomes a balloon state in the air mixing part. It has the advantage of being able to use oxygen in the atmosphere and the fact that the cavitation phenomenon is controlled by moving gently and sucking into small bubbles from the tip of the balloon-like state due to the negative pressure in the water pipe. is there.

FIG. 1 is an explanatory view showing a container for reducing the atmospheric pressure. Example 1 FIG. 2 is a cross-sectional view of the air mixing section water pipe. (Example 2) FIG. 3 is a schematic diagram of a piping system and apparatus. (Example 1)

Maintains the water quality in the aquarium by supplying one-fifth of the volume of air in the atmosphere to the filter media in the filter, bacteria that propagate in the aquarium, aquatic organisms in the aquarium, etc. Therefore, air is sucked in using the negative pressure in the circulating water return pipe during operation of the circulating water pump attached to the filter. The atmosphere has atmospheric pressure, and the direct suction causes trouble to the pump. It is controlled by reducing the pressure of the atmosphere, realizing energy saving and water quality maintenance.

FIG. 1 is an installation diagram of a container valve for depressurizing the atmospheric pressure of Example 1 of the device of the present invention, wherein 1 is a container for depressurizing the atmospheric pressure, 2 is an air intake section, 3 is an atmospheric inlet valve, 4 is an outlet The valve 23 also serves as a backflow prevention by a gap in the outlet valve cover.
FIG. 2 is a cross-sectional view of a water pipe, 6 is an air mixing part water pipe, 7 is a circulating water return pipe, 5 is a water pipe inlet union, and 8 is a connecting tube connected to a container 1 for reducing the atmospheric pressure.
FIG. 3 is a schematic diagram of the piping system and apparatus, 17 is a water tank, 13 is a filter, 14 is a filter medium, 6 is an air mixing section water pipe, 11 is a circulating water pump, and 1 is a container for reducing the atmospheric pressure. is there.

The inside 1 of the container for depressurizing the atmospheric pressure in FIG. 3 is connected by the atmosphere mixing part water pipe 6 and the connecting tube 8 in FIG. 3, and the circulating water return negative pressure in the air mixing part water pipe 6 during operation of the circulating water pump 11. Then, the inside of the container 1 for depressurizing the atmosphere is set to a negative pressure, and the atmospheric air is sucked from the air intake unit 2. The atmospheric air inlet valve 3 is allowed to pass, and the atmospheric pressure atmosphere is throttled. The throttled atmosphere is decompressed by a diaphragm expansion action, and further passes through the outlet valve 4 in FIG. 1. At this time, it is also characterized by a two-stage decompression.

By controlling the cavitation phenomenon in the circulating water pump 11 by depressurizing the atmosphere of the present invention, by introducing bacteria floating in the air together with oxygen in the natural atmosphere, the metabolism of bacteria can be performed, and it is always in operation The power cost of the pump 11 alone is not charged, and the oxygen contained in the atmosphere is oxygen together with the atmosphere because of the metabolism and activity of the bacteria that propagate in the atmosphere along with the oxygen in the filter 13 in the filter 13 and the water tank 19. By supplying, the water quality in the aquarium can be maintained and the frequency of water changes can be reduced.

The ornamental aquarium 19 has conditions for the propagation of facultative anaerobes, and there is a bottom 16 in the aquarium as a place where the contact of free oxygen is interrupted for culturing. Since the facultative anaerobic bacteria mentioned above are also taken into the air naturally, there is a possibility that the facultative anaerobic bacteria can be entrapped and immobilized, and the nitrates of the final metabolites of the bacterial oxidative degradation chain are passed through the denitrifying bacteria. It is used as a final electron acceptor by anaerobic bacteria, and there is a phenomenon that it is assumed that a denitrification reduction action that reduces to nitrogen gas occurs, and the measured value of the residual accumulation of nitrate shows a value close to zero, The effect of reducing appears.

  FIG. 2 is an essential part of the present invention, and is a cross-sectional view of an air-mixing section water pipe using negative pressure. Example 2 is an inlet of the circulating water return pipe 7 and the filter 13 from the water tank 19 of FIG. Install in the middle. The air mixing portion water pipe 6 is connected to the connecting tube 8 from the outlet valve cover 23 of the container 1 for reducing the atmospheric pressure, and is integrated with the connecting tube 8 so that the reduced pressure of the returning air is gently sucked and mixed with the negative pressure of the circulating water. It is a part.

In order to enhance the cross-sectional throttle effect (fluid suction effect) at the tip of the water pipe inlet union 5, the tip is inserted to the middle of the air mixing part water pipe 6 and slightly inclined in the direction of water flow with respect to the water pipe surface. It is the air mixing part water pipe that is most characterized by being attached.

The present invention can be used in the industrial field of molding, manufacturing and selling parts and devices for maintaining the water quality of an aquarium lover's ornamental water tank.

DESCRIPTION OF SYMBOLS 1 Container which decompresses atmospheric pressure 2 Atmospheric intake part 3 Atmospheric inlet valve 4 Outlet valve and backflow prevention valve 5 Water pipe inlet union 6 Air mixing part water pipe 7 Circulating water return pipe 8 Connecting tube 9 Cock 10 Connecting tube connecting part 11 Circulation Water pump 12 Circulating water feed pipe 13 Filter 14 Filter medium 15 Circulating water suction port 16 Water tank bottom sand 17 Water tank 18 Raising and ornamental lighting 19 Water tank 20 Circulating water discharge port 21 Adsorption board (back side)
22 Fluid flow direction 23 Outlet valve cover

  The present invention relates to the use of air to maintain the water quality of an ornamental aquarium.

  The cause of water pollution in the ornamental aquarium is mainly caused by uneaten food from aquatic organisms such as tropical fish bred in seawater and freshwater aquariums, excrement and waste of aquatic plants.

There are two types of water pollution: physical and organic pollution, and maintaining the water quality in the traditional ornamental tank uses a filter to process the physical and organic traces to maintain the water quality. Organic foods such as food leftovers and excreta are processed naturally from the air in the natural world into the aquarium by various aerobic beneficial bacteria, genus Nitrosonas and Nitrobacter. This oxidative degradation, in which organic matter is treated by the oxidative degradation chain action of bacteria from harmful ammonia excreted from aquatic organisms by bacteria in the degradation chain action to harmful nitrous acid, and from this harmful nitrous acid to harmless nitrate Chain action requires free oxygen.

All aerobic bacteria take in free oxygen and oxygen molecules floating in the water and perform biofiltration of the oxidative degradation chain by oxidation. In order to promote the oxidative degradation chain, it is necessary to grow and activate the bacteria. As a breeding place, it is important to replenish oxygen in the filter medium in the filter and in the extremely small bubbles that are close to free oxygen in the water tank. Oxygen is necessary and important for performing.

As a problem of biological oxidative degradation chain filtration, it becomes a harmless nitrate at the final stage of oxidative degradation chain, but when this reaches a residual concentration of 30 mg / liter, there is a problem of causing adverse effects on the aquatic organisms by inhibiting growth and immunity. In order to protect aquatic organisms, aquarium enthusiasts have to spend time and effort to manually change the water in the tank, and about one third of the water to the outside of the tank to dilute the nitrate concentration. There was a necessary drawback.

It is said that facultative anaerobic organisms that have a different effect on the above-mentioned bacteria, denitrifying facultative anaerobes, and some bacteria float in the atmosphere, and for metabolic systems using inorganic nitrogen compounds, catabolic nitrate reduction and anabolic There are two types of nitrate reduction, but denitrification reaction that breathes oxygen under oxygen-rich conditions and releases nitrate, nitrous oxide, nitrogen, etc. using nitrate as the final electron acceptor in the hypoxic region Nitrate accumulated as the final metabolite of the oxidative degradation chain by the above-mentioned organic bacteria, which is one of the problems of this proposal, is to adopt and use denitrifying facultative anaerobes together with the atmosphere. By using denitrifying bacteria facultative anaerobes and reducing them to nitrogen, they are discharged as nitrogen bubbles outside the water tank, and it can be expected to reduce the frequency of water change by reducing the residual nitrate concentration.

Conventionally, as a device for supplying oxygen to aquatic organisms, etc., various devices have been devised and put on the market using air-powered A-pumps, such as airstone at the outlet, and resin to make fine bubbles. Oxygen in the volume is one-fifth of the volume, and if the bubbles are large, the rate of rise is fast, the oxygen dissolution rate is poor, the effect of supplying free oxygen required by beneficial bacteria for oxidative degradation chain filtration is poor, and power consumption is wasted .

As an improvement measure, there is a method of taking oxygen into the ornamental water tank of Japanese Patent Publication No. 2005-14383 (the date of final disposal of the bean removal by unexamined request, Hei 19227). The negative pressure in the circulating water return pipe of the circulating water pump attached to the water tank is used to directly take in the outside air and to stir with the rotary gear of the pump. Using external air with external pressure in the pump and directly using the negative pressure in the return pipe of the circulating water to suck the flowing water mixed with bubbles into the pump causes cavitation (cavity phenomenon). (Phenomenon that creates a vortex near the place where the cross-section and direction of flowing water changes, causing vortices, causing vibration and noise in hydraulic machines such as pumps, screws, propellers, etc., causing wings and pump failures.) The phenomenon occurred and it was impossible to use.

Japanese Patent Laid-Open No. 2005-14383

Encyclopedia Mypedia Anaerobic Bacteria

Source Free encyclopedia Wikipedia facultative anaerobe

The problem to be solved is to supply oxygen in the atmosphere for the growth and activity of the filter media in the filter and the bacteria that propagate in the water tank in order to maintain the water quality while also saving energy in the water tank. The most efficient supply method is to introduce atmospheric oxygen, bacteria, etc., using the negative pressure of the circulating water in the return pipe while the filter circulating water pump is operating outside the water tank.
It is difficult to use the negative pressure in the return pipe of the circulating water pump to directly suck the circulating water mixed with air into the pump because there is a problem that cavitation phenomenon occurs, but this cavitation phenomenon is controlled to save energy. It is for the purpose of using oxygen etc. in the atmosphere efficiently.

In order to control the cavitation phenomenon, the present invention uses the negative pressure of the circulating water return pipe (7) to introduce the atmosphere into the container (1) and reduce the atmospheric pressure by the expansion and expansion action.
A valve provided at the outlet of the container (1) by connecting the connecting tube (8) to the union (5) attached to the inlet of the air mixing part water pipe (6) attached to the circulating water return pipe (7) ( 4) The connecting tube connecting portion (10) and the connecting tube (8) of 4) are connected to the air mixing portion water pipe (6) and the container (1).
Using the negative pressure in the circulating water return pipe (7), the inside of the container (1) is brought into a negative pressure state, and the atmosphere is sucked and taken in from the air intake part (2). The atmosphere is installed in the container (1). By forcibly sucking and passing through the valve (3) at the entrance, the air taken in at this time is decompressed into the container (1) by the expansion and expansion action by the valve (3) at the entrance. The main feature is that the outlet valve (4) provided at the outlet is sucked and passed by the negative pressure in the connecting tube (8), and the pressure is further reduced at the second stage at this point. And

The atmospheric pressure reducing device of the present invention does not pressurize the atmospheric pressure with respect to the negative pressure of the circulating water, but is sucked into the negative pressure of the circulating water, and the inlet of the water pipe in the air mixing part water pipe (6) At the tip of the union (5), the air in the state without pressure remains in a balloon state, but the air bubbles are intermittently shredded from the tip of the balloon state by the negative pressure in the air mixing part water pipe (6), and small bubbles The circulatory water pump (11) is gently sucked and carried and can suppress the cavitation phenomenon, so that the oxygen in the atmosphere can be directly absorbed in the ornamental water tank without damaging the circulatory water pump (11). Oxygen is supplied directly to aquatic organisms that require oxygen and bacteria that propagate on the filter medium (14) in the filter (13), and bacteria floating in the open air can be mixed for metabolism and maintain the best water quality. Is promoted The problem to be solved by the present invention can be supplied by using the circulating water return negative pressure of the circulating water pump (11), and the power cost of the circulating water pump (11) can be used to save energy and maintain the water quality in the tank. Has the advantage of being able to accomplish the task.

FIG. 1 is a diagram showing an outline of a piping system and apparatus for reducing the atmospheric pressure. (Example 1) FIG. 2 is a view showing attachment of the air mixing unit water pipe to the circulating water return pipe. (Example 2) FIG. 3 is an explanatory view showing the container.

In order to maintain the water quality in the aquarium, oxygen in the air is supplied to the filter medium (14) in the filter (13) and the bacteria that breed in the aquarium and the aquatic organisms in the aquarium. The circulating water pump (11) attached to the filter (13) takes in the air by utilizing the negative pressure in the circulating water return pipe (7) during operation. At this time, the circulating water pump suppresses the problem cavitation caused by bubbles. Realized energy saving and water quality maintenance without damaging (11).

A first embodiment will be described with reference to FIG.
FIG. 1 is a schematic diagram of a piping system and apparatus. An inlet of a water pipe comprising a circulating water return pipe (7) and an atmosphere mixing part water pipe (6) connected by a container (1) and a connection tube (8). This is an atmospheric pressure reducing device that introduces a negative pressure of circulating water at the tip of the union (5) to make the inside of the container (1) negative.
In the middle of the circulating water return pipe (7) on the suction side during operation of the circulating water pump (11), connect the circulating water return negative pressure in the attached air mixing part water pipe (6) with the connecting tube (8). The inside of the container (1) is set to a negative pressure, atmospheric air is sucked from the air intake part (2) of the container (1) and passed through the valve (3) installed at the entrance of the container (1). Here, the atmospheric air is throttled by the valve (3) at the inlet, the atmospheric air throttled in the container (1) is depressurized by the throttle expansion action, and the air mixing unit water pipe ( 6) It is sucked by the negative pressure inside and passes through the valve (4) installed at the outlet of the container (1). At this time, it is further characterized by this pressure reducing action in which the pressure is further reduced by two stages by the throttle resistance of the valve. .

This will be described with reference to FIG.
It is the figure which attached the air mixing part water pipe (6) to the circulating water return pipe (7). (6) is an air mixing part water pipe, (7) is a circulating water return pipe, (5) is a union at the inlet of the water pipe, (22) the flow direction of the atmosphere, (24) the flow direction of the circulating water, (8) is The connecting tube is connected to the container (1).

This will be described with reference to FIG.
It is an installation view of the valve of the container (1) of Example 1 of the device of the present invention, (1) is the container, (2) is the air intake part, (3) is the inlet valve, (4) is the outlet valve , (8) is a connecting tube, (10) is a connecting tube connecting portion, (23) is an outlet valve cover, and (21) is a back side suction disk.

The atmospheric pressure reducing device of the present invention suppresses a defective cavitation phenomenon in the circulating water pump (11), so that bacteria floating in the air together with oxygen in the natural atmosphere, etc. from the air intake part (2) of the container (1) The intake circulating water return pipe (7) can metabolize the bacteria that propagate on the filter medium (14) in the filter (13), and only the power cost of the pump (11) that is always in operation does not incur power costs. Oxygen is supplied for the metabolism and activity of bacteria that propagate in the filter medium (14) in the filter (13) and bacteria in the water tank together with oxygen contained in oxygen, and floats in the atmosphere described above by introducing the air The facultative anaerobes are also introduced and the denitrification reduction characteristic of facultative anaerobes can be expected, and the water quality maintenance water change frequency in the aquarium can be reduced.

In particular, the filter medium (14) in the hermetic external filter filter (13) has the conditions for breeding due to the characteristics of facultative anaerobes. Present in the filter medium (14).
By gently taking the atmosphere into the filter (13), the facultative anaerobic bacteria floating in the atmosphere are naturally taken together with the atmosphere, so that the facultative anaerobic bacteria can be entrapped and fixed. Yes,
There is a phenomenon that the denitrification and reduction action of reducing nitrate to nitrogen gas occurs by using nitrate as the final electron acceptor by the denitrifying bacteria facultative anaerobic bacteria in the bacteria of organic matter by the oxidative degradation chain. The measured value of the residual accumulated amount of water shows a value that is close to zero and has the effect of reducing it, so that it is possible to reduce the waste of time for water change in the water tank.

A second embodiment will be described with reference to FIG.
FIG. 2 is a cross-sectional view of an air mixing section water pipe (6) using negative pressure, which is the key to the present invention, and Example 2 is an air mixing installed in the middle of the inlet of the filter (13) of the circulating water return pipe 7 The partial water pipe (6) is connected and integrated with the connecting tube (8) from the connecting part (10) of the container (1), and the reduced pressure atmosphere is gently aspirated by the negative pressure in the circulating water return pipe (7). It is the most important part to do.

The tip of the union (5) at the inlet of the water pipe increases the suction effect of the throttle effect fluid, so that the tip is inserted to the middle of the air mixing part water pipe (6) and is slightly inclined in the direction of the circulating water flow (24) It is an air mixing part water pipe (6) characterized by attaching to the most.

The present invention can be used in the industrial field of molding, manufacturing and selling parts and devices for maintaining the water quality of an aquarium lover's ornamental water tank.

DESCRIPTION OF SYMBOLS 1 Container 2 Atmospheric intake part 3 Inlet valve 4 Outlet valve 5 Union at the inlet of water pipe 6 Atmospheric mixing part water pipe 7 Circulating water return pipe 8 Connecting tube 9 Cock 10 Connecting tube connection part 11 Circulating water pump 12 Circulating water feed pipe 13 Filter 14 Filter medium 15 Circulating water suction port 16 Bottom sand in water tank 17 Water tank 18 Raising and ornamental lighting lamp 19 Inside water tank 20 Circulating water outlet 21 Adsorption board (back side)
22 Air flow direction 23 Outlet valve cover 24 Circulating water flow

Claims (1)

A valve is provided at the atmosphere inlet of the container for depressurizing the atmosphere, a valve is provided at the outlet side, and an outlet valve cover is provided at the outlet valve. Atmospheric pressure, characterized in that the tip of the pipe in the pipe inlet union of the air mixing part water pipe that is integrated with the container for depressurizing the atmosphere is inserted to the middle of the pipe with a slight inclination in the direction of the circulating water flow Decompressor.