JPS5824200B2 - Sediment stirring device - Google Patents

Description

Detailed Description of the Invention The present invention is useful for increasing feeding efficiency by hoisting up bait and nutrients that have settled on the bottom of the water in fish farms, and for raising up the bait and nutrients that have settled on the bottom of the water in sewage treatment plants, human waste treatment plants, wastewater treatment plants, etc. The present invention relates to a precipitate stirring device suitable for rolling up precipitated scum, sand, etc. and making it easier to transport them to the outside of a treatment plant.

Traditionally, fish farms and sewage treatment plants have not been equipped with equipment to effectively agitate sediment, so feeding efficiency tends to be low at fish farms, and sewage treatment plants are not equipped with equipment to effectively agitate sediment.
It required a lot of effort to process.

The present invention aims to avoid the above-mentioned conventional problems by rotating the nozzle that spouts water by the reaction of the jet stream, and will be explained in conjunction with the drawings as follows.

At the bottom of the sewage treatment tank 1 shown in FIG. 1, a rotating nozzle unit 3 that rotates due to the reaction of water pressurized by a submersible pump 2 is installed. A stand bent pipe 6 (made of cast iron) provided on the stand 5 is connected by a cast iron pipe 7.

A mechanical seal box 11 is attached to an outward flange 10 at the upper end of the curved tube in order to rotatably support a stainless steel hollow shaft 9 around a vertical center line 01 with respect to the upward outlet 8 of the curved tube 6. Bearing support cylinder 12. Mechanical seal box 1
3. The mechanical seal retainer 14 sequentially presses a plurality of bolts (
(not shown), and two upper and lower ball bearings 15 fixed in the bearing support cylinder 12 support the hollow shaft 9.

16 is a mechanical seal.

A stainless steel nipple 20 cast into the vertical base 19 of a three-way PVC tube 18 is integrally connected to the upper end of the hollow shaft 9 that protrudes upward from the seal holder 14 through a socket 21. 18 pair of horizontal parts 22.
Discharge bent pipes 23 and 23' made of vinyl chloride are connected to the discharge bent pipes 22' through stainless steel nipples 24.
At the tip of 23' is a discharge nozzle 2 also made of stainless steel.
5.25' is cast.

The pair of discharge bent pipes 23 and 23' have hollow shafts 9 when viewed from above.
It is oriented in the same circumferential direction centered on the center line 01 of (
(FIG. 2), the distances of both nozzles 25, 25' from the center line O1 are equal and Ll.

As shown in FIG. 3, both nozzles 25, 25' are inclined downward by an angle α with respect to the horizontal plane, and are directed toward the bottom of the water.

03 is the nozzle center line. The rotating nozzle unit 3 is arranged at the bottom of the water in the center of the sewage treatment tank 1 as shown in FIG.

26 is a submersible pump for discharging sewage in the tank 1 to the outside of the tank.

When the submersible pump 2 shown in FIG. Hollow shaft9. Three-way tube18. 1 through the discharge bent pipe 223.23'
A jet stream 27,27' is ejected into the water from the pair of nozzles 25,25', and the nozzle 2525' receives a reaction force from the jet stream 27,27', which causes the three-way tube 18 to move in the direction of arrow A together with the hollow shaft 9. Rotate.

Each nozzle 25, 25' is viewed from above as shown in Figure 2.
1 and radius L1, and therefore, when viewed from above, it always faces the tangent direction of each point on the mill 27'', and is only at an angle α as shown in Fig. 3. Since the jets 27 and 27' are directed downward, they are able to impact the sediments on the bottom of the water in a wide range around the rotating nozzle unit 3, and the sediments are rolled up by the force of the jets 27 and 27'. and mixes with the sewage above.

As a result, a generally doughnut-shaped circulation flow B (FIG. 1) is generated in the tank 1, centered around the rotating nozzle unit 3.

In FIG. 5, a strainer 30 that also serves as a support for the pump 2 is attached to the lower side of the submersible pump 2, a rotary nozzle unit 31 is fixed inside the strainer 30, and the unit 31 is connected to the discharge pipe of the pump 2 via a pipe 32. It is connected in the middle of 33.

According to this structure, a part of the water pressurized by the pump 2 is supplied to the unit 31 from the discharge pipe 33 through the pipe 32,
From there, it is ejected downward and stirs the precipitate below the pump suction port.

There is no problem even if the pipe 32 is connected to another pump 2t.

Figure 6 is an enlarged view showing a part of Figure 5 in vertical cross section,
The same symbols as those in the figure indicate corresponding parts.

In Fig. 6, 35 and 36 are the pump casing, 37 is the suction port, and 38 is the impeller.

39 is a pump shaft.

The strainer 30 is fastened to the lower surface of the casing surrounding the suction port 37 at the inward flange 40 at the upper end with a plurality of bolts, and a number of rod-shaped supporting legs 41 protrude downward from the lower end periphery of the cylindrical main body 30'. Each support leg is 41.4
The inflow passage 42 between the holes 4 and 1 has a large number of holes 4 formed in the bottom plate 43
4 and communicates with the suction port 37.

5. The structure shown in FIG. 6 has the advantage that when discharging sewage etc. from the tank to the outside of the tank, the precipitates can be well stirred and the precipitates can be discharged at the same time.

FIG. 7 shows another embodiment, in which a horizontal part 22' of the three-way pipe 18 is connected to a discharge bent pipe 23' via an extension pipe 46, and a discharge bent pipe 23' is connected to the other horizontal part 22. are connected in the opposite direction to that in FIG. 2, and the nozzles 25, 25' are both inclined downwardly by an angle α with respect to the horizontal plane, as shown in FIG.

L2 is the amount of lateral deflection of the nozzle 25'.

This structure has the advantage that the rotational moment of the jet 27' in the direction of arrow A is reduced by the jet 27, the rotation in the direction of arrow A becomes gentler, and the reach of the jets 27, 27' increases.

Reference numeral 47 in FIG. 8 denotes a nozzle body in the form of a hollow disk, and nozzles 48 and 48' facing tangentially are integrally provided on the outer circumference.

With this structure, rotational resistance is significantly reduced, and it is possible to avoid problems in which elongated foreign objects such as strings or cloth in the water become entangled with the nozzle.

9 and 10 show another layout, 49 is a pump installed outside the tank 1, 50 is a suction pipe, 51 is a discharge pipe, 52 is a pipe, and one end of the pipe 52 is connected to the discharge pipe 51. However, the other end is connected to the rotary nozzle unit 3.

One end of the pipe 53 in FIG. 10 is connected to the discharge port of the pump 49, and the other end is connected to the rotary nozzle unit 3.

The present invention provides a hollow shaft 9 placed vertically in water, and a nozzle 25.25' located at a certain distance laterally away from the shaft and oriented in a direction having a circumferential component of the hollow shaft 9. is connected to one end of the hollow shaft 9 and rotatably supported together with or on the hollow shaft 9, the other end of the hollow shaft 9 is connected to the discharge port of the water pump 2, and the nozzle 25. 25' along the bottom of the water so that it can lift up sediment on the bottom, or
The nozzle 25.25', which rotates due to the reaction of the jet stream 27.27', faces toward the water bottom, so that the nozzle 2
The jet stream 27.27' ejected from 5.25' collides with and devours the sediments on the water bottom over a wide range, and can powerfully dig through and stir these sediments.

Since the jet stream 27.27' ejected from the nozzle 25.25' is water, it has a large penetrating force in the aquarium, unlike when air is ejected, so even after stirring the sediment on the bottom of the water, the jet stream 27.27' is water. When a flow is generated in the nearby water and the rotating nozzle unit 3 is placed in the center of the aquarium as shown in Figure 1, the circulating flow B swirling in a vertical cross section forms a doughnut-shaped center centered around the rotating nozzle unit 3. It rotates around line 01, which has a very great effect of uniformly mixing the sediment into the water in the tank.

Therefore, when the present invention is applied to a fish farm, the bait that was wasted on the bottom of the water can be actively dispersed and suspended in the water above, increasing the chances that fish will encounter the bait. As the bait moves through water, it tends to rot.
<, Feeding efficiency is improved.

Since the bait does not accumulate on the water bottom, it is possible to prevent water quality from deteriorating due to decay of the bait, and the reduction in fish cultivation space due to sediment is also prevented.

Furthermore, when the present invention is adopted in a sewage treatment plant, etc., it not only becomes extremely easy to discharge the sediment to the outside, but also avoids problems such as foul odor pollution caused by the decay of the sediment and a decrease in the volume of the sewage treatment tank. can do.

Note that the nozzle may be lowered and placed along the bottom of the water.

In that case, a wider range of precipitates can be rolled up.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view, Figure 2 is a sectional view taken along ■-■ in Figure 1, Figure 3 is a sectional view taken along ■-■ in Figure 2, Figure 4 is a plan view showing the layout, and Figure 5 is a sectional view taken along ■-■ in Figure 1. 6 is a partially enlarged vertical cross-sectional view of a portion of FIG. 5; FIG. 7 is a front view showing another embodiment; FIG. 8th
The drawings are a drawing corresponding to FIG. 2 and a drawing 9. for showing another embodiment. FIG. 10 is a longitudinal sectional view showing another layout. 2... Submersible pump, 4... Discharge port, 9... Hollow shaft, 25... Nozzle 0

Claims (1)

[Claims] 1. A hollow shaft placed vertically in water, and a nozzle oriented in a direction having a circumferential component of the hollow shaft at a position a certain distance laterally away from the shaft, and the nozzle is connected to one end of the hollow shaft, and the nozzle is installed along with the hollow shaft. , or rotatably supported on a hollow shaft, the other end of the hollow shaft being connected to a discharge port of a water pump, and the nozzle being placed along the water bottom so as to stir up sediment on the water bottom, or in the direction of the water bottom. A precipitate stirring device characterized by being oriented diagonally downward so as to face.