JP2502593Y2 - Pumping cylinder - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump for improving the water quality by improving the convection of water between the surface of lakes and reservoirs and the deep layer.

In recent years, in many lakes and reservoirs, eutrophication has rapidly progressed due to the inflow of nutrient salts such as nitrogen and phosphorus. Such eutrophication causes the generation of rotten odors and musty odors, and also causes the abnormal occurrence of algae.

When the above-mentioned situation occurs, it causes water damage and environmental deterioration. Therefore, it is desired to prevent eutrophication of lakes and reservoirs and improve water quality.

[0004]

2. Description of the Related Art Conventionally, an air blowing cylinder is vertically installed in the water to be treated, and compressed air is fed into an air chamber provided under the water to blow air intermittently by utilizing a siphon action. There is known a sewage purification device which generates convection in the water in the vicinity of the cylinder (for example, Japanese Patent Publication No. 42-5795).

According to this device, the air chamber is provided in the outer peripheral portion of the lower portion of the tubular body, and when a predetermined amount of air is accumulated in the air chamber, the air is provided in the central portion of the tubular body. It is guided to the inside of the cylinder through the air supply pipe and rises as an air bullet inside the cylinder.

By such an operation, the deep water inside the cylinder is pushed up, and new deep water is introduced into the cylinder from the lower water inlet. The deep water ejected from the upper part of the cylinder is mixed with the surface water containing rich oxygen to supply oxygen. Convection of the water to be treated is realized by repeating the above operation.

However, although the above-mentioned device has a predetermined effect in that convection is generated by forcibly pushing up deep water and discharging it to the surface layer, the mixing of surface water and deep water is left to itself. Therefore, there is a drawback in that it is impossible to efficiently mix anoxic deep water and surface oxygen rich water, that is, to take dissolved oxygen into the deep water efficiently.

In order to eliminate such a drawback, an attempt has been made to provide agitating means such as a protrusion in the passage of the air bullet in the cylinder to agitate deep water and air to pump water.

However, the above-mentioned structure has a drawback that the deep water and air are not sufficiently stirred, and the apparatus becomes complicated by providing the stirring means.

[0010]

The present invention has been made in view of the above circumstances, and efficiently agitates deep water and air with a simple structure to pump water efficiently according to the installation environment. An object of the present invention is to provide a pumping cylinder capable of containing a large amount of dissolved oxygen in deep water discharged from the upper part of the cylinder.

[0011]

According to the pump of the present invention, compressed air is sent to an air chamber, and when the air chamber is filled with a predetermined amount of air, the pump is intermittently blown out through the cylinder. A pumping cylinder having at least two communication pipes for guiding the air filled in the air chamber and the water in the vicinity of the air chamber into the cylindrical body, the pumping pipe being provided so that the openings in the side wall of the cylindrical body of the communication pipes face each other. In the above, the opening ratio of the water intake portion on the bottom surface of the pump is adjustable in the range of 10% to 90% by the opening ratio adjusting plate.

[0012]

[0013]

According to the present invention, compressed air is sent to the air chamber, and when the air chamber is filled with a predetermined amount, the compressed air is blown out intermittently through the cylindrical body. Water in the vicinity is made to collide inside the cylinder by passing through a communication pipe provided so that the openings face each other, and for example, water in a low oxygen state and oxygen in the air are forcibly mixed and stirred. It is a pumping cylinder.

As a result, pumping is performed in a state in which a predetermined amount of oxygen is taken into the anoxic deep water, so that the mixing efficiency of the deep water and the surface water discharged from the upper part of the cylinder is improved, and the dissolved water is dissolved. A lot of oxygen is taken in. In particular, the opening area of the water intake section on the bottom surface of the pumping cylinder can be adjusted according to the installation environment, for example, the water depth of the installation location, the area covered, and the like. Therefore, deep water can be pumped efficiently and a water purification action can be expected.

Further, since the compressed air is sent from the central portion of the air chamber and discharged from the end portion of the air chamber, the structure of the communication pipe connecting the air chamber and the cylinder is simplified, and the manufacturing cost is reduced. It can be reduced and maintenance can be performed easily.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a vertical sectional side view showing the construction of an embodiment of a pumping cylinder according to the present invention. 2 is a plan view taken along the arrow AA in FIG. 1, and FIG. 3 is a bottom view taken along the arrow BB in FIG.

In the figure, 1a is a bottomed cylindrical body, and an air chamber 2 is formed in the lower part thereof. Bottomed cylinder 1a
Can be fixedly connected to the flange 4 of the cylindrical body 1b by the flange 3, and the length of the cylinder can be adjusted as necessary.

A float made of, for example, foamed synthetic resin is attached to the upper side wall of the bottomed cylindrical body 1a (the upper side wall of the cylindrical body 1b when the cylindrical body 1b is connected). A weight is connected to the lower part of the air chamber 2 by a wire, and an anchor is further connected to the weight so as to be fixed to the lake bottom or the like (none of them is shown).

Since the method of mooring the pump at a predetermined position while making the pump stand by itself by the float, the wire, the weight, and the anchor is well known, and the description thereof is omitted here.

At a predetermined position below the bottomed cylindrical body 1a,
Communication pipes 5, 6 communicating with the air chamber 2 are fixed, and the openings of the communication pipes 5, 6 in the inner wall of the bottomed cylindrical body 1a are provided so as to face each other.

An air supply pipe 8 is vertically penetrated through the center of a partition plate 7 forming the bottom surface of the bottomed cylindrical body 1a, and one end thereof is opened inside the air chamber 2. The other end has a bottomed cylinder 1.
It penetrates the side wall of a and is guided to the outside.
An air supply hose 9 is connected to the air supply pipe 8 so that air is supplied by a compressor (not shown).

At the center of the air chamber 2, there is provided a bottomed cylindrical body 1c having a partition plate 7 constituting the bottom surface of the bottomed cylindrical body 1a as an upper bottom, and its lower end side is an opening. There is.

Further, a conical flange 10 having a partition plate 7 portion as a substantially base portion is fixed to the bottomed cylindrical body 1a, and the bottom circumferential portion of the conical flange 10 serves as a peripheral surface. The air chamber 2 is formed by fixing the cylindrical body 11 to be fixed.

The lower cutting surface of the cylindrical body 12 concentrically provided inside the cylindrical body 11 and the lower cutting surface of the cylindrical body 13 concentrically provided outside the cylindrical body 11 are formed in a donut shape. A concentric box body closed by a partition plate 14 is fitted and fixed to the cylindrical body 11.

Further, a cylindrical body 15 is concentrically provided on the outer side of the cylindrical body 13, and the upper surface thereof is a donut-shaped partition plate 16.
And is fixed to the end of the conical collar 10.

It should be noted that one end of each of the communication pipes 5 and 6 on the air chamber 2 side is fixed to the partition plate 16 and opened into a space communicating with the inside of the air chamber 2.

In the above-mentioned structure, the opening between the cylindrical body 13 and the cylindrical body 15 is reduced to an arbitrary ratio by the baffle plate 17 shown by the diagonal lines as shown in the bottom view of FIG. .

By adjusting the opening ratio between the cylindrical body 13 and the cylindrical body 15 as described above, the intake amount of the deep layer water is adjusted, and the optimum pumping efficiency according to the installation environment can be obtained. Such an opening ratio depends on the water depth of the installation site,
10%, for example, depending on the shared area per pumping cylinder
It is adjusted appropriately in the range of 90% to 90%.

To adjust the opening ratio, several types of donut-shaped opening ratio adjusting plates 20 having intermittently formed baffle plates 17 and openings 18 as shown in FIG. 4 are prepared and installed. It is possible to install the one that suits the environment. The attachment can be performed by an appropriate means such as bolts or welding, but the bolt holes and the like are omitted.

Further, a plurality of aperture ratio adjusting plates 20 having a typical aperture ratio are used and the baffle plate 17 is gradually changed to be attached while increasing or decreasing the overlapping portion of the baffle plate 17 to thereby increase the aperture ratio. It is also possible to make fine adjustments.

For example, if two baffle plates 17 occupy 20% of the entire aperture ratio adjusting plate 20 are prepared, it is possible to change from 20% to a maximum of 40%. In addition, 30%
If so, it is possible to adjust from 30% to a maximum of 60%.

In the above structure, from the air supply hose 9,
When pressurized air (a pressure slightly higher than the water pressure in the air chamber) is fed in as shown by the arrow, first, the air enters the bottomed cylindrical body 1c through the air feeding pipe 8 and is filled in the bottomed cylindrical body 1c. The water is pushed down.

When the water level reaches the lower end of the opening of the bottomed cylindrical body 1c, the overflowing air is conical collar 10 and cylindrical body 11
The water that overflows into the air chamber and is filled in the space is pushed down. At this time, the cylindrical body 11 and the cylindrical body 12
The water between and is also pushed down at the same time.

In this state, when the water level reaches the lower end of the cylindrical body 11, air is rapidly discharged in the direction indicated by the solid arrow by the siphon action. At this time, the cylindrical body 11
The water filled between the cylinder body 13 and the cylinder body 13 is pushed up, and as shown by the dotted arrow,
The water filled in the space is also entrained, and is guided into the bottomed cylindrical body 1a through the communication pipes 5 and 6.

In this case, the water flow indicated by the dotted arrow is the amount adjusted by the baffle plate 17. Paradoxically, the adjustment of the opening ratio by the baffle plate 17 should be adjusted so as to optimize the water amount indicated by the dotted arrow according to the conditions of the installation location.

Here, since the opening of the communicating pipe 5 and the opening of the communicating pipe 6 are provided so as to face each other, the air entrained with water which has passed through the communicating pipes 5 and 6 has a bottomed cylindrical body. Water and air are agitated by violent collision at the bottom of 1a.

A large number of bubbles are generated by this agitation, and an air mass containing water is formed. As a result, oxygen is taken into deep water in a low oxygen state, and the amount of dissolved oxygen increases.

The air mass containing the water thus agitated rises like a shell in the bottomed cylindrical body 1a (and the cylinder 1b). The water in the cylindrical body 1a is pushed up, and the water is sucked from the opening in the lower part of the air chamber.

The rising speed of the air mass can be controlled by adjusting the opening ratio by the baffle plate 17.

As described above, the air mass rapidly rises due to the buoyancy, so that the water rapidly rises following it.

When the air in the air chamber 2 is exhausted in this way, the air chamber 2 is filled with water again, and the same pressurized air as described above is accumulated. In this way, as a result of the air in the air chamber 2 being intermittently blown out, the water sucked from the suction port formed in the lower portion of the air chamber 2 also rises intermittently, and the bottomed cylindrical body 1a (and the cylindrical body 1a 1b)
Is discharged to the upper end via.

The pumping interval is controlled according to the inflow velocity of air into the air chamber 2, and is, for example, 10 to 15 seconds.

As described above, according to this embodiment, the air lump entrained with water is made to collide with the bottomed cylindrical body 1a, and the amount of water taken in is adjustable, so that a special stirring means is provided. Air and water are well agitated without. As a result, oxygen is taken into deep water in a low oxygen state, and the amount of dissolved oxygen is increased.

In the above embodiment, two communication pipes 5 and 6 are provided as the cylindrical body for guiding the air containing water, but the number is arbitrary as long as it is two or more. In short,
It may be any number as long as it can collide air masses containing water.

[0045]

As described above in detail, according to the present invention,
A pump with a simple structure that can adjust the amount of water and pumps water while efficiently agitating the deep water and the deep water discharged from the upper part of the cylinder to abundantly contain dissolved oxygen. can do.

[Brief description of drawings]

FIG. 1 is a vertical side view showing an embodiment of the structure of a pumping cylinder according to the present invention.

FIG. 2 is a plan view taken along the line AA of FIG.

FIG. 3 is a bottom view shown by the arrow BB in FIG.

4 is a plan view showing an example of an aperture ratio adjusting plate attached to the bottom surface of FIG. 1. FIG.

[Explanation of symbols] 1a Bottomed cylindrical body 1b Cylindrical body 1c Bottomed cylindrical body 2 Air chamber 3,4 Flange 5,6 Communication pipe 8 Air supply pipe 9 Air supply hose 10 Conical collar 11,12,13,15 Cylindrical body 7,14,16 Partition plate 17 Baffle plate 18 Opening 20 Opening ratio adjusting plate

Claims (1)

(57) [Scope of utility model registration request] 1. Compressed air is sent into an air chamber, and when the air chamber is filled with a predetermined amount of air, the compressed air is blown out intermittently through a cylindrical body, and the air filled in the air chamber and the air chamber. A pumping cylinder having at least two communication pipes for guiding water in the vicinity into the cylinder, and the opening of the communication pipe on the side wall of the cylinder facing each other. A pumping cylinder characterized in that the ratio can be adjusted in the range of 10% to 90% by an opening ratio adjusting plate.