JPS58771B2 - Screw conveyor type cylindrical dredging machine with auger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to relatively shallow and not wide ports, bays,
A small vertical excavator that vertically excavates sludge and earth (hereinafter referred to as earth and sand, etc.) accumulated at the bottom of river mouths, canals, etc. to a desired depth using a cylindrical auger, then pushes it up using a screw conveyor and moves it sequentially for dredging. The present invention relates to a screw conveyor type cylindrical dredging machine with an auger.

Conventionally, bucket conveyor dredgers, which have been used in wide-area ports and bays, are efficient and economically suitable for wide-area, long-term work, but they are not suitable for use in small ports with a water depth of 6 to 2 meters, such as fishing ports, lead pools, estuaries, etc. When dredging canals in urban areas where bridge piers are too narrow for dredgers to enter, other dredging methods must be used.

Therefore, as a small-sized dredging machine suitable for dredging in the above-mentioned places, a power shovel-type screw conveyor type dredging machine was developed as disclosed in Utility Model Registration Application No. 53-26318 filed by the same inventor and applicant as the present invention. The invention according to the present application was completed with the development goal of making it even more compact, making it easier to transport and moving, and preventing the outer periphery from becoming unnecessarily cloudy during dredging.

To roughly explain the gist and purpose of the present invention, a cylinder made of iron plate, preferably at least about 2 m in diameter and about 8 m to 10 m in length, is erected perpendicularly to the water surface, and the lower end periphery of the cylinder reaches the bottom surface, A main and auxiliary screw conveyor assembly equipped with an auger at the lower end is set up in the cylinder along its axis, and the earth and sand are rubbed into the cylinder. While excavating, the lower edge of the cylinder is lowered into the earth and sand by its own weight, and this process is repeated until the cylindrical shape is dredged to the desired depth. Adjacent areas are then dredged in the same manner to form a predetermined area. They carry out dredging.

Therefore, the advantages of the screw conveyor type cylindrical dredging machine with an auger of the present invention are that the structure and composition are simple, and because the dredging machine performs vertical excavation dredging while automatically lowering the cylinder at a fixed position, dredging can be done by simply first positioning the dredger vertically. There is no need to acquire medium-skilled operation techniques, and since the soil excavation is disturbed within a cylinder, there is almost no sludge turbidity over a wide area, unlike with dredgers or the aforementioned tractor power shovel type dredging machine. .

Still another feature of the present invention is that a plurality of water pumps are connected to the top surface of the cylinder along the inner circumferential surface of the cylinder in order to enhance the soil lifting efficiency of the auger-equipped screw conveyor and the natural settling of the cylinder. The lower end portions of the arranged water pipes are formed flat along the inner circumferential surface and open downward at the lower end of the cylinder.

This flat opening increases the water jetting effect and causes the earth and sand under the lower end periphery of the cylinder to be jetted to the center of the cylinder, thereby promoting the sinking of the cylinder due to its own weight, and at the same time increasing the earth and sand scooping effect of the screw conveyor. was completed.

An embodiment of the dredging machine of the present invention will be described below with reference to the drawings.

1 to 6, a screw conveyor assembly 1 is comprised of a main screw conveyor 2 and a small auxiliary screw conveyor 3 fixed along opposite sides of the lower part of the conveyor 2. , each screw conveyor 2
, 3 is the husband outer cylinder 2a.

3a, screws 2b, 3b and screw shaft 2c.

3c, and the outer cylinder 3a arranged in three pieces.

2a and 3a are surrounded and fixed by a mantle 4 that surrounds them in a substantially diamond shape.

The lower edges of the outer cylinders 2a, 3a and the outer mantle 4 end at the same level.

The actual dimensions of the main screw conveyor 2 are preferably up to approximately 1
1? ? Z, and the diameter is approximately 60 cm as the inner diameter of the outer cylinder 2a.
It is m.

The auxiliary screw conveyor 3 has a length of about 3 m to 4 m and a diameter of about 30 crrL.

A bearing 6 through which the main screw shaft 2c passes is attached to the center of the top lid 5 of the main screw conveyor 20, and a hydraulic motor 7 for driving the shaft 2c is attached to the top surface of the lid 5. It is being

On the side surface of the outer cylinder 2a directly below the top cover 5, there is a horizontal discharge pipe 8 for earth and sand with the same or slightly smaller diameter, and at the tip thereof a flexible bellows pipe 9 of the same diameter for conveying to a hopper or the like. The lower edge of the outer cylinder 2a ends one or two pitches above the tip of the main screw 2b.

At the lower end of the main screw 2b is an auger 1 for raising earth and sand.
0, and an excavation drill 12 having a plurality of horizontal earth and sand stirring stud bolts 11 or two or three rods in the middle is directly connected to the tip of the shaft 2c.

The upper end of the mantle 4 has a round diamond-shaped lid 13 (which has the same planar shape as the mantle 4) and has a through-hole in the main screw conveyor outer cylinder 2a and a through-shaft hole in each of the auxiliary conveyor shafts 3c.
2), an auxiliary conveyor bearing 14 is attached to the shaft hole position of the lid 13, and a hydraulic motor 15 for driving the shaft 3c is attached to the upper surface of the lid 13.

The auxiliary screw 3b is provided at a lower portion from the approximate center of the auxiliary conveyor shaft 3c, and a full opening 1 is provided within the mantle 4 at a height of 2 to 3 pitches from the upper end of the screw 3b.
6), the outer tube 2a facing this is also entirely opened 17 within the outer tube 4 toward each of the outer tubes 3a, and both openings 16
, 17 has a two-part partition lid 19 (see FIG. 3) having a peripheral edge inscribed in the inner circumferential surface of the mantle 4, circumscribed in the outer cylinder 2a, and having a bearing 18 through which the shaft 3c passes. are sandwiching the outer cylinder 2a and sealingly welded the peripheral edge thereof, and the lower end surface between the openings 16 and 17 is formed by the outer cylinder 2a,
3a and the mantle 4 are hermetically welded by a partition wall 20 parallel to the partition lid 19 (see Fig. 4).

Thus, the partition lids 19 above and below the opening, the partition walls 20, and the left and right side walls of the mantle 4 form a connecting passage between the outer cylinders 2a and 3a.

The lower end periphery of the mantle 4 and the outer cylinder 3 that overlaps the mantle 4
The lower end peripheries of portions a and 2a are screwed by the screws 2b and 3b.
It ends at a position about 1 pitch above the lower end of the husband.

The four gaps corresponding to the partition wall 20 that occur at the lower edge of the mantle 4 are located approximately 30 degrees above the outer mantle 2a from the point where the outer periphery of the mantle 2a, 3a separates from the side wall of the mantle 4. , 3a are welded to the contact points of the outer cylinders 2a and 3a. The lower end of the screw 3b of the auxiliary conveyor is equipped with an auger 22 and a drill 23, similar to the lower end of the main screw 2b.

A cylinder 30 with a circumferential spacing, preferably about 2 m in diameter and a maximum length of about 8 m, in which the screw conveyor assembly 1 can be moved or rotated, is raised on the bottom perpendicular to the water surface. Channel type reinforcing members 31, 31' are arranged on the inner circumferential surface of the upper end and the inner circumferential surface slightly above the lower end, and four downward facing reinforcement members 31 and 31' are arranged at equal intervals between the reinforcing members 31 and 31'. An L-shaped reinforcement member 32 is provided.

The reinforcing material 31° 31' is in close contact with the inner surface of the cylinder 30.
, 32, eight water pipes 33 are arranged in parallel and equally spaced, each upper end of which is connected to an annular collector pipe having an outer diameter approximately the same as that of the cylinder above the top surface of the cylinder 30. 34, each lower end of which forms a downward flat opening 35 along the inner surface of the lower edge of the cylinder 30, and the mountings installed on two opposing sides of the upper end of the cylinder 30 are mounted on a stand 36. The collector pipe 34 and the drain pipe 39 to the outside of the cylinder are connected to a water supply/drainage switching valve 38 connected to the discharge pipe side of the water pump 37 installed, and the The upper end of a water suction pipe 40 that descends along the inner surface of the cylinder 30 and has an open lower end near the intermediate height position of the auxiliary screw conveyor 3 is connected.

According to the above-mentioned water piping system, by forming the flat opening 35 at the end of the water pipe 33, the function of blowing away the earth and sand by the jetting force of water is increased, and the lower end peripheral edge of the cylinder 30 has a certain degree of, for example, 0.05 mm. If the cylinder sinks to a layer of 5 m to 1.0 m of earth and sand, most of the water inside and outside the cylinder will be cut off, so at the beginning of dredging, switch to the drain pipe 39 and drain the water inside the cylinder to the outside. By lowering the water level to a position above the lower end opening of the water suction pipe 40, the hydrostatic pressure inside the cylinder is lowered and the pressure difference with the jetting pressure of the flat opening 35 is increased, thereby further increasing the jetting force of the water, The turbid water in the cylinder is circulated through the water suction pipe 40, the water pump 37, the collecting pipe 34, and the water supply pipe 33 and is ejected from the flat opening 35, thereby maintaining the increased ejection force while substantially maintaining the water level. By increasing the efficiency of removing the sediment around the lower end of the cylinder 30 and collecting it to the center, the sinking of the cylinder 30 is further promoted and the scooping efficiency of the screw is increased.

Furthermore, according to this water piping, the turbid water inside the mouth cylinder during dredging only circulates and is not released to the outside, so the water around the outside is hardly eroded, and since the water level inside the cylinder is low, the muddy water is not discharged outside. Drainage is extremely quick, and soil containing almost no standing water can be discharged.

Further, the top lid 5 of the screw conveyor assembly 10 is provided with a hanging fitting 41 for posture control such as movement and rotation within the cylinder 30, and for lifting. A plurality of hanging fittings 42 are provided for initial positioning, posture control, and extraction.

The screw conveyor assembly 1 and the cylinder 3 can be suitably used depending on the water depth of the work site and the desired dredging depth.
It is convenient to prepare 2 to 3 types of 0 with different lengths.

The cylindrical dredger of the present invention can also be suitably applied to excavating bridge pillars.

[Brief explanation of the drawing]

FIG. 1 is a front view of a screw conveyor type cylindrical dredger with an auger according to the present invention, including a partially broken surface and a cross section. 2 is a sectional view of the screw conveyor assembly 1 shown in FIG. 1, FIG. 3 is a sectional view of the screw conveyor assembly 1 shown in FIG.
CC sectional view of the screw conveyor assembly 1 in the figure, No. 5
The figure is a bottom view of FIG. 1, and FIG. 6 is a plan view of the top surface of the cylinder in FIG. Following these figures, 1...screw conveyor assembly,
2... Main screw conveyor, 3... Auxiliary screw conveyor, 4... Mantle, 5... Top lid, 6...
Bearing, 7.15... Hydraulic motor, 8... Discharge pipe,
9... Flexible bellows tube, 10, 22... Auger, 11
...Shut bolt, 12,23...Drill, 13.
... Round diamond-shaped lid, 14.18... Bearing, 16,17.
...Opening, 19...Partition lid, 20...Partition wall, 21
... Shaping plate, 30 ... Cylinder, 31.31 ... Channel type reinforcement material, 32 ... L type reinforcement material, 33 ... Water pipe, 34 ... Tubular collecting pipe, 35 ...・Flat aperture, 3
6... Installation stand, 37... Hydraulic pump, 38... Switching valve, 39... Drain pipe, 40... Water suction pipe, 41° 42... Hanging fittings.

Claims (1)

[Claims] 1. In a screw conveyor type cylindrical dredging machine with an auger that is hydraulically driven by remote control from land or aboard a ship transporting earth and sand, etc., a long shaft main screw conveyor with a hydraulic drive motor on the top and a lower part of the conveyor This is a screw conveyor assembly consisting of a plurality of auxiliary screw conveyors having hydraulic drive motors on the top surfaces of a plurality of short shafts with small diameters, which are fixedly held together with the conveyor by a jacket, with outer cylinders arranged closely symmetrically around the outer periphery of the outer cylinder. In order to replenish earth and sand from the auxiliary screw conveyor to the main screw conveyor, the main screw conveyor has a discharge pipe located directly below the top end of the screw of the auxiliary screw conveyor. Each side facing the outer cylinder and the outer cylinder of the main screw conveyor is open and cooperates with the mantle to form a sealed dirt passageway, the lower end of each of the outer cylinders terminating at the lower end of the mantle. , each outer cylinder facing part at the lower end forms a downwardly open diagonal semi-elliptical common space, and an auger is provided at the lower end of the screw of the main screw conveyor, and a plurality of augers are provided at the lower shaft end in the middle part. A drill with a stud or rod for earth and sand agitation is attached, and a small auger is also installed at the lower end of the screw of the auxiliary screw conveyor, and a drill is attached to the tip of the shaft to drill the screw conveyor assembly. preferably has a diameter sufficient to allow the assembly to be moved or rotated coaxially within the cylinder, and preferably has a length that extends approximately three-fourths of the length of the cylinder, and the lower end is on the inner surface of the lower end of the cylinder. The upper end of a large number of water pipes arranged parallel to each other at equal intervals along the inner surface is formed into a circular pipe by forming a water spout with a flat downward opening along the inner surface of the cylinder. One or two water pumps are connected to the collecting pipe and installed near the top surface of the cylinder, and the collecting pipe and a drainage pipe to the outside are connected to the discharge pipe of the pump via a switching valve, A piping system in which the upper end of the water suction pipe is connected to the suction pipe of the pump, the lower end of which opens near the intermediate height position of the auxiliary screw conveyor along the inner surface of the cylinder, allows the water in the cylinder to be drained at the initial stage of dredging. A cylinder that discharges the water to the outside through the water suction pipe and the drainage pipe to lower the water level to near the upper surface of the auxiliary screw conveyor, and circulates the jet water through the water suction pipe and the water supply pipe during dredging work. Screw conveyor type cylindrical dredging machine with auger.