JPS5821833Y2 - Overflow water clarification device for sediment carriers, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an overflow water clarification device for use with VC buttons on earth and sand carriers, and more specifically, to a device for preventing water surface pollution that occurs when overflow water is discharged overboard in the aforementioned carriers, dredgers, etc. It is something.

In a conventional earth and sand transport vessel, for example, as shown in Fig. 1, earth and sand water is pumped into the mixture C through a loading pipe g that opens on the bow side of the mixture C by a sediment water loading pump a. When loading, the earth and sand settles in the blend C, and separated water (muddy water)
The water flows over the submerged weir d into the overflow trough f as overflow water, and is then discharged overboard through the discharge port e.

However, in this case, because the head difference H between the liquid level A of the blend C and the liquid level B of the overflow trough f is very large, the overflow water collides with the falling water to generate bubbles, and after being released overboard, an air lift phenomenon occurs. Overflow water, including muddy water, rises and pollutes the water surface.

The present invention relates to an overflow water clarification device installed on a sediment transport vessel, etc., with the purpose of preventing water surface pollution as described above. An earth and sand transport ship or the like is configured to allow the flow to flow into a trough and then discharge it overboard from a discharge port, an overflow weir is provided at the rear of the blended yarn so as to be movable up and down, and an opening is provided in the overflow trough. The overflow weir, which is a valve seat facing the discharge port, is provided so as to be movable up and down at the same time, and furthermore, a partition plate for adjusting the discharge flow rate is provided on the device facing the valve seat to follow fluctuations in the liquid level of the overflow trough. It is characterized by being provided so that it can be moved up and down.

Embodiments of the present invention will be described below based on the drawings.

Figure 2 shows an example in which the overflow water clarification device of the present invention is applied to, for example, an earth and sand carrier (the same applies to dredgers, etc.), where 1 is the ship's hull, and 2 is the earth and sand. A water loading pump, 3 is a loading pipe, 4 is a blend, 5 is an overflow weir located on the stern side of the blend 4, and 7 is an overflow installed after the blend 4 and has discharge ports 6 on both sides. It's a trough.

The overflow weir 5 can be vertically adjusted by a handle 9Vr- via a rond 8 to adjust the height of the liquid level A of the blended yarn 4, and the overflow trough 7
Inside is a movable valve seat 1 with an opening 13 of a required size.
2 are positioned facing the inlet of the discharge port 6,
The movable valve seat 12 is connected to the handle 9 via a rod 8, and is configured to move up and down simultaneously with the overflow weir 5.

Furthermore, there is a partition plate (valve) 11 facing the movable valve seat 12, which is connected via a rod 14 to a float 10 floating on the liquid level B in the overflow trough T.
By moving the partition plate 11 up and down in accordance with the fluctuation of B, the discharge flow rate of overflow water flowing into the discharge port 6 can be adjusted.

Incidentally, 15 is a turnbuckle attached to the middle of the rod 8, so that the relative positional dimension of the overflow weir 5 and the movable valve seat 12 can be adjusted.

Further, 16 is a turnbuckle attached to the middle of the rod 14.

Next, the operation of the overflow water clarifier having the above configuration will be explained.

The earth and sand transferred by the earth and sand water loading pump 2 is loaded into the bow side of the blend 4 via the loading pipe 3, and the loaded earth and sand settles while moving from the bow side to the stern side and is separated. Water (including muddy water) reaches the overflow weir 5 on the stern side.

Separated water and reoverflow water that has passed over the overflow weir 5 flows into the overflow trough 7.

In this one design, the liquid level BK of the overflow trough 7
The partition plate 11 moves up and down by the following float 10, and the opening degree of the partition plate 11 corresponding to the liquid level B (the opening degree with respect to the opening 13 of the movable valve seat 12) is automatically determined.

Furthermore, since the movable valve seat 12 is connected to the overflow weir 5 by the rod 8, when adjusting the liquid level A of the blended yarn 4 upward (or downward), the overflow weir 5 is connected with the handle 9.
When the movable valve seat 12 is adjusted upward (or downward), the liquid level B of the overflow trough 7 is also raised (
or downward).

This results in a head difference between liquid level A and liquid level Ht-it-mio-
It is kept constant with respect to the bar flow trough inflow rate.

Therefore, by keeping the head H as low as possible, it is possible to reduce the falling energy of the overflow water and completely prevent the entrainment and foaming of bubbles due to collisions when falling, and the overflow water is released from the discharge port 6 outboard. After being released, the muddy water is prevented from rising due to the air lift phenomenon,
As a result, pollution of the water surface and water can be prevented.

Since the discharge port 6 is open toward the seabed, the muddy water immediately settles toward the seabed after being discharged, and this is promoted.

Regarding the aforementioned partition plate (valve) 11, the length of the rod 14 can be changed by rotating the turnbuckle 16, so that the height of the liquid level B in the overflow trough can be adjusted. .

With the above-described configuration and operation, the overflow water clarifier for earth and sand carriers, etc. of the present invention exhibits the following excellent effects.

(I) The liquid level of the blend and the liquid level of the overflow trough can always be maintained in a constant relationship, and the liquid level difference (head) between them can be minimized, reducing falling energy and preventing the generation of bubbles. Therefore, it is possible to prevent pollution of the water surface and water after overflow water is discharged.

(6) As mentioned in item (I) above, since pollution of the water surface and water can be prevented, adverse effects on seaweed and fish are eliminated.

■ As mentioned in α) above, since pollution on the water surface and in the water can be prevented, the amount of dirt mixed into the cooling water used for sand transport vessels, miscellaneous water, etc. is reduced, and equipment performance and wear due to sand and sand are reduced. do.

In addition, wear and corrosion of the propulsion device and the like due to earth and sand are reduced, which is advantageous in terms of maintenance and inspection of equipment, and running costs can be reduced.

[Brief explanation of the drawing]

FIG. 1A is a schematic side view showing an example of the prior art, the opening in FIG. 1 is a view taken along the line I-I in FIG. 1A, and FIG. The opening in Figure 2 is a view in the direction of the low ■ arrow in Figure 2 A. 4... Blend, 5... Overflow weir, 6... Discharge port, 7... Overflow trough, 10... Float, 11... Partition plate (valve), 12... Movable valve seat ,
13...Opening.

Claims (1)

[Scope of utility model registration request] Sediment and sand water is loaded into a mixed spinning vessel, and the separated water is used as overflow water to cross a weir and flow into an overflow trough before being discharged overboard from a discharge port. The overflow weir, which is a valve seat having an opening and facing the discharge port, is provided in the overflow trough so as to be movable up and down. An overflow water clarifier, characterized in that a partition plate to be adjusted is provided so as to be movable up and down following fluctuations in the liquid level of the overflow trough.