JPH02248533A - Suction head for sludge disposal device - Google Patents

Abstract

PURPOSE:To contrive to remove sludge in homogenized condition by providing two vertical shafts in a case to which suction pipes are installed in series to the upper part of an opening at its lateral side, and by rotating agitator blades, that are in outside diameters bigger than the distance between shaft centers and are twisted and inclined respectively in the opposite directions, in noncontact meshing state in the opposite directions. CONSTITUTION:A case 1, provided with an opening 3 for intake of sludge at its front and a number of grilles 4 for preventing inflow of large-sized solid substances among sludge, is connected to a suction hose 15 of a sand pump with a coupling 5 at the junction of a branched suction pipe 2. Vertical shafts 6 and 7 are installed at the inside of the case 1 through bearings 8 and 9, and agitators 10 and 11 that are twisted and inclined respectively in the opposite directions are fixed thereto in noncontact meshing state. The agitators 10 and 11 are also provided with blades that are in outside diameters bigger than the distance between the shaft centers of the vertical shafts 6 and 7 and are inclined respectively in the opposite directions. Thereby sludge can be homogenized even through it is heavily loaded with small-sized solid substances and clods.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a suction head in a sludge treatment apparatus for treating sludge deposited in ports, rivers, lakes, etc.

[Conventional technology]

Conventionally, various methods have been used to dispose of sludge, commonly known as sludge, that has accumulated in ports, rivers, lakes, etc. For example, a method of lowering a hose from a ship and sucking up the sludge, or a method of using an underwater power shovel. There are methods to directly pump out the sludge.

[Problem to be solved by the invention]

However, with the above-mentioned method of lowering a hose from the ship and sucking in the sludge, it is difficult to dispose of small solids in the sludge that are larger than the inner diameter of the hose, and if the small solids clog the end of the hose, the work becomes difficult. On the other hand, the method using an underwater power shovel is suitable for processing small solids in sludge, but it is not suitable for processing sludge in a fluid state mixed with water or seawater. It was inefficient and unsuitable.

Therefore, the problem to be solved by the present invention is that if installed on the suction side of a sand pump for suctioning sludge, for example, small solids in the sludge can be crushed and the sludge can be homogenized. An object of the present invention is to provide a suction head for a sludge treatment device that can efficiently suction and force feed sludge.

[Means to solve the problem]

The present invention has been made with the aim of solving the above-mentioned problems, and has a structure in which two vertical shafts are housed in a housing-like case that has an opening on the side and a suction pipe connected to the top. At the same time, stirring blades having an outer diameter larger than the distance between the shafts and twisted and inclined downward in opposite directions are attached to the vertical shafts in a non-contact meshing state, and both stirring blades are respectively The gears are characterized in that they are rotated in opposite directions through gears with the same number of teeth, maintaining a mutually accurate positional relationship and meshing state.

[For production]

Inclined stirring blades that are twisted in opposite directions rotate in opposite directions about two vertical axes while maintaining accurate positional meshing, which crushes small solids in the sludge and improves the homogeneity of the sludge. The sludge can be liquefied and fluidized, making it easier to suction the sludge with a sand pump.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a side sectional view of an example of the suction head of the present invention, FIG. 2 is a front view, FIG. 3 is a sectional view taken along the line A--A in FIG. 2, and FIG. 4 is a plan view.

In the figure, 1 is a housing-like case with a suction pipe 2 connected to the upper part, and 3 is an opening for introducing sludge provided in the front of the case 1 to prevent large solids from flowing into the sludge. A large number of gratings 4 are attached, and the suction pipe 2 has a bifurcated shape, and a flange joint 5 connects the sand pump (
It is connected to a suction hose 15 (not shown). Incidentally, case 1 serves as an enclosure when mixing sludge and water or seawater, which will be described later.

Reference numeral 6.7 denotes a vertical shaft disposed in the case 1 via bearings 8 and 9, and stirring blades 10 and 11 twisted and inclined in opposite directions are meshed with each other in a non-contact state on these vertical shafts 6 and 7. Each stirring blade 10.11 has an outer diameter larger than the center-to-center distance of the vertical shaft 6.7, and has blades inclined in opposite directions like a normal helical gear. There is.

12 is a gear attached to the vertical shaft 6 in the bearing part 8;
13 is a gear attached to the vertical shaft 7 in the bearing portion 9, and the gear 12 and the gear 13 are gears having the same number of teeth that mesh with each other.

Reference numeral 14 denotes an oil motor that is installed on the bearing part 8 and rotates the shaft 6. As shown in FIG. 3, when this motor 14 rotates counterclockwise, the stirring blade 10 on the left side also rotates counterclockwise. Along with this rotation, gear 12 also rotates counterclockwise, so gear 13 meshing with gear 12 rotates clockwise.
The shaft 7 and the stirring blade 11 on the right side also rotate clockwise.

Therefore, both stirring blades 10.11 rotate in mutually opposite directions at the same angular velocity, and by adjusting the meshing position of gear 12 and gear 13 and the meshing position of both stirring blades 10.11, the helical gear can be meshed exactly. However, they rotate in the same way as they rotate at the same angular velocity.

In addition, the positional relationship between the stirring blades to and tt in the above-mentioned meshed state is such that the spacing is maintained to the extent that small solids in the sludge can be crushed without contacting each other, and this positional relationship is the same as that of the stirring blades. Adjustment can be made by appropriately changing the inclination angle or outer diameter.

Further, in the figure, 16 is sludge, 17 is water or seawater, and 18 is subsoil at the bottom of the water mixed with gravel.

The suction head of the present invention is composed of the above 1 to 14, and is used by being connected to a suction hose 15 of a sand pump, etc., and by rotating both stirring blades 10 and 11 in the case 1, the sludge 16 is removed. By moving the sludge in the right direction in FIG. 1 at a required speed while sucking it through the opening 3, the sludge can be treated homogeneously and sent to a sand pump or the like.

During the treatment, large foreign objects in the sludge 16 are removed by the grid 4, but small solid objects are removed.

For soil clods, etc., both stirring blades rotate in an interlocking state at 10°1.
1 and crushed, and mixed into a uniform state that can be easily pumped with a sand pump. At this time, as described above, the case 1 also serves as an enclosure for mixing, and the sludge 16 in a fluid state generated by the stirring blades 10.11 varies depending on the inclination angle of the stirring blades 10.11. , stirring Hto.

Flow in the radial direction from the center of No. 11 to the outer circumference.

Alternatively, it can also serve as a flow path perpendicular to the bottom ±18 direction.

In addition, when treating the sludge 16, when the sludge 16 has a high viscosity or in a place where only the sludge 16 has accumulated,
By supplying an appropriate amount of water into the case 1, it can be treated to a concentration that can be sucked and pumped using a sand pump.

Furthermore, the sludge that got between the gravel on the surface of the subsoil 18,
A cleaning effect can also be expected by mixing using the stirring blades 10 and 11.

〔Effect of the invention〕

The present invention is as described above, and the suction head for a sludge treatment device of the present invention is capable of homogenizing not only sludge that is in a fluid state from the beginning but also sludge that contains a large amount of small solids and clods by means of an inclined stirring blade. It can be converted and removed.

Furthermore, even if the sludge has a high viscosity, by supplying an appropriate amount of water into the body, it is possible to stir and mix the sludge to a viscosity that can be sucked in by a sand pump and to homogenize it.

Furthermore, since the suction head of the present invention has a simple structure, it is less likely to break down, and can be easily manufactured and provided at a low location.
It is extremely economical because it can be easily attached to the tip of a conventionally used suction hose.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of an example of the suction head of the present invention, FIG. 2 is a front view, FIG. 3 is a sectional view taken along the line A--A in FIG. 2, and FIG. 4 is a plan view. 1... Case, 2... Suction pipe, 3... Opening of case. 4... Grid, 5... Flange joint, 6, 7... Vertical shaft, 8.9... Bearing part, 10.11... Stirring blade,
12.13...Gears. 14... Oil motor, 15... Suction hose for sand pump, etc.

Claims (1)

[Claims] Two vertical shafts are arranged in a case having an opening on the side and a suction pipe connected to the top, and each of the vertical shafts has an outer diameter larger than the distance between the shafts. Stirring blades that are twisted downward in opposite directions are installed in a non-contact meshing state, and both stirring blades are moved in opposite directions while maintaining a meshing state in a precise positional relationship through gears with the same number of teeth. A suction head for a sludge treatment device, characterized in that it rotates.