JPH09328775A - Mud soil discharge and feed device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To convey mud soil having high concentration to a remote target place by providing a cushion device for mud soil in a hopper which receives mud soil, providing a vibration filter which removes foreign matters which is mixed in mud soil in a lower part of the hopper, providing a mixing device which mixes and blends mud soil which passes the vibration filter in a lower part of the vibration filter, connecting a screw conveyor to a mud soil discharge port of the mixing device, connecting a discharge and feed pipe to a mud soil discharge port of the screw conveyor, and providing a pressurizing pump and an ejector for compressed air on the halfway of the discharge and feed pipe. SOLUTION: Mud soil in a bulk condition which is charged into a hopper 30 passes downward as it is and enters a vibration filter, and a large lump of mud soil drops into a cushion device and is crushed into a bulk condition. Mud soil which is turned into minute lump of soil enters a mixing device after a foreign matter is removed by the vibration filter, is fed into a discharge and feed pipe 70 through a screw conveyor 66, and is pressurized by a presurizing pump for transportation in the pipe. Furthermore, it is conveyed to a remote target place by the discharge and feed pipe 70 and an ejector.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mud discharging device for receiving a large clump of solidified mud or mud containing gravel and carrying it by air to a distant destination. The present invention relates to a mud discharging device capable of buffering and receiving the same without damaging the equipment, crushing it so that it can be transported, and efficiently and continuously transferring a large amount to a remote destination.

[0002]

2. Description of the Related Art As a conventional mud discharging device, there is known a mud discharging device that draws mud dropped from a hopper from a lower discharge port and conveys it to a distant destination by a belt conveyor device or other transportation device. These mud discharging devices can be smoothly and continuously transported to a distant destination without obstacles when the mud to be input does not contain a large mass of solidified mud and is therefore efficient as such. It can be used effectively.

[0003]

However, when a large amount of mud containing a large solidified mud is treated by the above-mentioned mud conveying device, the following problems occur. When a large amount of solidified mud is put into the hopper, a large impact load is applied to each device such as the hopper, which causes damage to the device and shortens its life. Even if a large lump of solidified mud can be received in the hopper, it cannot be retained and discharged in the hopper, which necessitates manual crushing work and hinders the continuous transfer of mud. It is not possible to efficiently remove foreign substances such as iron pieces, wood, and plastic that are mixed in the mud. When sand, pebbles, gravel, etc., which cause wear to the equipment, are mixed in the mud, the screw blades such as the screw conveyor are greatly worn, which increases maintenance costs such as repair and replacement of the screw blades. In the present invention, the above problems are solved, and mud containing consolidated large-scale mud can be efficiently and automatically processed continuously and safely and reliably transported to a remote destination, and a transportation device such as a screw conveyor. It is an object of the present invention to provide a mud conveying device with reduced wear.

[0004]

In order to solve such a problem, in the present invention, the first aspect of the present invention is a mud discharging device for discharging mud containing a large mass of solidified mud. A hopper for receiving the mud, a cushioning device for the mud arranged in the hopper, a vibrating sieve arranged in the lower part of the hopper for removing foreign matters mixed in the mud, and a vibrating sieve arranged in the lower part of the vibrating sieve. A kneading device installed to knead the mud that has passed through the vibrating screen, a screw conveyor connected to the mud discharge port of the kneading device, a discharge pipe connected to the mud discharge port of the screw conveyor, and the discharge pipe The cushion device is formed of a pressurizing pump and an ejector of compressed air provided in the middle of the hopper, and the cushion device extends in a substantially horizontal direction in the hopper and is fixed to the cushion device. A comb-shaped fixing plate having a cavity and It is formed by a pair of left and right rotating paddles horizontally provided on both sides of the fixed plate and having a plurality of rotating blades sweeping through each of the cavities, and the screw conveyor is fixed on the outer periphery of the screw blades. A plurality of detachable mud pressure plates made of wear-resistant material are arranged facing each other on the upstream side in the direction of rotation of the screw blades. According to a second aspect of the present invention, in the first aspect, a cushioning device including a plurality of compression springs or leaf springs is provided below the cushion device. In the third invention, the first
In addition, a plurality of grizzly or bar screens arranged in parallel or in a grid pattern are provided at the mud receiving port in the upper portion of the hopper of the second invention. And in the 4th invention, the check valve for preventing mud backflow was provided between the pressurizing pump and the ejector.
Further, in the fifth invention, a gamma ray densitometer or a transparent monitoring tube is provided in the middle of the discharge tube.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, there is provided a mud discharge device for discharging mud containing a large mass of solidified mud, which comprises a hopper for receiving the mud and a mud arranged in the hopper. A cushion device, a vibrating screen disposed below the hopper to remove foreign substances mixed in the mud, a kneading device disposed below the vibrating screen to knead the mud passing through the vibrating screen, and the kneading device. A screw conveyor connected to the mud discharge port of the device, a discharge pipe connected to the mud discharge port of the screw conveyor and a pressure pump and a compressed air ejector provided in the discharge pipe, The cushion device includes a comb-teeth-shaped fixing plate having a plurality of cavities that are substantially horizontally extended and fixed in the hopper and are arranged in parallel to each other at equal intervals on both sides, and both side portions of the fixing plate. Sweep horizontally through each of the cavities And a pair of left and right rotating paddles having a plurality of rotating blades, and the screw conveyor has a plurality of detachable resistance members facing the upstream side in the screw blade rotating direction at regular intervals on the outer periphery of the screw blade. Since the mud pressing plate made of a wear material is arranged, even if a large amount of solidified mud drops in the hopper, the cushion device is provided, so the impact of the drop is reduced and the fixing plate By the operation of the rotary blades of the rotary paddles on both sides, the massive mud is crushed and fragmented into powder mud, which smoothly falls from the lower discharge port to the vibrating screen. The vibrating screen removes foreign matter above the screen and only the powdered mud that has passed through the screen is sent to the kneading machine, fully kneaded by the kneading paddle in the kneading machine, discharged from the mud discharge port, sent to the screw conveyor, and fed laterally. After that, enter the discharge pipe. In the screw conveyor, the mud is pressed in the traveling direction by the mud pressing plate attached to the screw blades, and even if the mud contains gravel, the presence of the mud pressing plate reduces wear on the screw blades. The mud that has entered the discharge pipe is pressurized by a pressure pump, and is plug-transported (plugged) by compressed air injected by an ejector in the middle of the discharge pipe, and is pneumatically transported to a distant destination. Further, the shock absorber provided in the lower portion of the cushion device of the second invention plays a role of cushioning the impact when the large mud is dropped, and the grizzly or bar screen of the third invention is used in the mud dropped on the cushion device. Of the foreign substances mixed in, particularly large foreign substances are excluded. Further, the check valve of the fourth invention prevents the mud from flowing backward through the discharge pipe due to the pressure of the compressed air injected from the ejector, and the gamma ray density meter or the transparent monitoring pipe of the fifth invention is It is for monitoring mud flow.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 11 relate to an embodiment of the present invention, FIGS. 1 and 2 show an embodiment of a mud discharging device adopted in a dredge barge, FIG. 1 is an overall side view of the dredge barge, and FIG. It is the whole top view of a dredge barge. 3 is an overall side view of the mud discharging device, FIG. 4 is a vertical sectional view taken along line AA of FIG. 3, FIG. 5 is a vertical sectional view taken along line BB of FIG. 3, and FIG. FIG. 7 is a plan view of a main part of the cushion device, FIG. 8 is a plan view of the main part of the cushion device, FIG. 9 is a side view of the main part of the screw conveyor, and FIG. 10 is D- of FIG. FIG. 11 is a front view of the view D.
[Fig. 4] is a side view of a mud pressing plate.

The mud discharging device 100 can also be used independently when it is installed at a land construction site and the mud mined at the mining site is transferred to a remote place. For example, as shown in FIG. In addition, as shown in FIG. 2, the mud loaded on the soil carrier (box barge) 10A, which was mounted on the dredger 10 and moored adjacent to the dredger 10, was used by the backhoe equipment 12. It is also used when receiving and transporting by piping to a distant destination. That is, as shown in FIGS. 3 to 6, the mud discharging device 100 includes a steel hopper 30 standing upright by a plurality of column bases, a cushion device 40 arranged in the hopper 30, The vibrating screen 50 installed in the lower part of the hopper 30, the kneading device 60 arranged directly below the vibrating screen 50, the screw conveyor 66 connected to the discharge port of the kneading device 60, and the screw conveyor 66 are followed. It is composed of a mud discharge pipe 70, a pressure pump 80 connected in the middle of the discharge pipe 70, and an ejector 90 for injecting compressed air.

At the upper end of the hopper 30, the mud receiving port is
A plurality of steel grizzlies (or bar screens) 32 arranged in parallel or in a grid are arranged in an array.
Grizzly (or bar screen) 32 is in hopper 30
It is intended to remove relatively large foreign matter in the mud to be put into, and the gap is usually about 100 to 150 mm. As shown in FIGS. 7 and 8, the cushion device 40 is formed of a fixed plate 42 in the middle and rotary paddles 44 arranged on both sides of the fixed plate 42, and both sides of the fixed plate 42 are equally spaced in the longitudinal direction. 42 arranged in parallel to
In addition to possessing a, the rotary paddle 44 has a reduction motor 4
7, a plurality of rotary blades 44a are rotatably driven and swept through the cavity 42a to rotate. As for the rotating direction of the rotary blade 44a, the rotary blade 44a of the rotary paddle 44 on the right side of the fixed plate 42 rotates counterclockwise, and the rotary blade 44a of the rotary paddle 44 on the left side of the fixed plate 42 rotates.
Is clockwise, and in each case, the rotary vanes 44a pass through the cavity 42a of the fixed plate 42 from top to bottom to divide the mud existing in the cavity 42a and drop it downward. Rotary vane 44
The cross-sectional shape of a is, when treating relatively hard mud,
In the case where a relatively soft mud is formed with a downward V-shaped knife shape, the mud existing in the hollow portion 42a of the fixing plate 42 has a rectangular cross-sectional shape, and this hollow portion 42 is used.
It is separated and dropped downward by a rotary blade 44a that sweeps through a, and the solidified massive mud is vertically divided into a plurality of slices. Both ends of the fixed plate 42 and the bearings 44b for supporting the rotary shafts of the pair of left and right rotary blades 44a are joined to the gantry frame 45, and are mounted on the shock absorber 46 composed of a plurality of compression springs (or leaf springs) 46a. After being placed, it is connected to the side wall of the hopper 30. The shock absorber 46 is, of course, installed to absorb an excessive impact when a large amount of mud drops on the cushion device 40.

The vibrating screen 50 is disposed directly below the lower discharge port of the hopper 30 and has a screen of 50 to 80 mm, and foreign matter mixed in the mud (iron pieces, wood, plastics, sheets, wires, etc.). Eliminate. A kneading device 60 is fixedly installed just below the vibrating screen 50. The kneading device 60 includes a plurality of rotating blades 6 arranged at equal intervals in a casing 62 whose lower part is reduced.
A pair of left and right rotary paddles 64 that rotate around the horizontal axis in which 4a are arranged are arranged so that the sweeping areas of the rotary blades can be overlapped, and are driven to rotate in mutually opposite directions. Knead thoroughly.

The lower discharge port of the kneading device 60 is a discharge pipe 60.
The mud, which is connected to a and has passed through the shutter 70A for emergency shutoff, enters the screw conveyor 66 which follows, is fed laterally, is discharged from the discharge port, and is guided to the pressurizing pump 80. Muddy soil often contains a considerable amount of sand, pebbles, gravel, etc., and the wear phenomenon of equipment during transportation is severe, and especially the screw blades 66a of the screw conveyor 66 operated at a high speed of about 600 rpm.
Since the abrasion is severe, the screw conveyor 66 is detachably equipped with a mud pressing plate 68 for abrasion as shown in FIGS. 9 to 11 in order to prevent the abrasion. That is,
A stand 69 and ribs 69a that reinforce the stand 69 toward the upstream side in the rotation direction of the screw blade 66a at an equal pitch on the outer circumference of the screw blade 66a (four circles in the embodiment of FIG. 10).
Weld this to the stand 69 as shown in FIG.
The mud pressing plate 68 is fastened with bolts 68a and nuts 68b so that it can be replaced. Mud pressure plate 68
Used wear-resistant high-manganese cast steel such as SCMnH71. Further, wear resistant overlay welding was applied to the surface of the screw blade 66a. As a result, the degree of wear of the screw conveyor that handles such mud has been drastically reduced. The mud laterally fed by the screw conveyor 66 moves to the discharge pipe 70 and enters the pressure pump 80. As shown in FIG. 5, for example, the piping after the pressurizing pump 80 is connected in the order of a check valve 110 for preventing mud backflow, an ejector 90 for injecting compressed air, a gamma ray density meter 120, and a transparent monitoring tube 130, After that, the discharge pipe 70 is laid up to a distant destination.

Next, the operation of the mud discharging device 100 of the present invention configured as described above will be described. First, the four corners of the dredging barge 10 are wire-attached to a desired work site and moored, and the earth carrier 10A is moored adjacent to the dredging barge 10. After that, the backhoe equipment 12 of the dredging barge 10 is operated to scoop the mud loaded on the soil carrier 10A,
Put into the hopper 30. The mud dropped on the hopper 30 abuts on the cushion device 40, and the mud in the loose state directly passes downward and enters the vibrating screen 50, but the solidified large mass of mud falls on the cushion device 40. Then, in cooperation with the shock absorber 46, the drop impact is softened, and the rotation of the rotating paddles 44 on both sides of the fixing plate 42 divides the large mud into slices in the longitudinal direction to divide the large mud into a loose state. Crush into pieces. After the foreign matter is removed by the vibrating screen 50, the mud thus subdivided enters the kneading device 60, is sufficiently kneaded, and is sent to the discharge pipe 70 via the screw conveyor 66 and is pressurized. It is pressurized by the pump 80 and transported in the pipe. Further, the compressed air of about 5 kg / cm ² injected from the ejector 90 in the discharge pipe 70 is plug-transported (plugged) in the discharge pipe, and is pneumatically transported to a remote destination.

In order to confirm whether or not the movement of the mud during the air conveyance is normal, a gamma ray density meter 120 is provided in the discharge pipe 70 to calculate the water content from the density or to discharge the discharge pipe. 70 In order to make it possible to visually monitor the middle of the tube as a transparent tube, a transparent monitoring tube 130 made of a transparent resin is arranged and monitored, and more highly concentrated mud can be transported safely and reliably without any trouble. . The pressurizing pump 80 remains in continuous operation during business. The reason is,
This is because the life of the motor for driving the pump is shortened if the operation and stop are repeated frequently. In addition, the check valve 110 for preventing the reverse flow of the compressed air is provided in the discharge pipe 7 immediately after the pressurizing pump 80.
It is desirable to arrange it at 0. When the cargo mud of the earthmoving ship 10A is emptied, the earthmoving ship 10A is replaced or the dredging barge 10 is moved to the next work location, and the same work is continued thereafter.

As described above, in the present invention, while performing the same pump dredging as in the prior art, it is not the discharge of the mud having a high water content, which is the drawback of the conventional pump dredging, but the high concentration of less water. The mud discharge can be realized. Also,
Even if the mud is a large lump of solidified mud, it is possible to reduce drop impact, damage the hopper, and continuously discharge the mud without interrupting the work. Further, in the screw conveyor, since the mud pressing plate is provided, wear is reduced.

[0014]

As described above, the present invention has the following excellent functions and effects. Highly-concentrated mud with little water accompanying it can be continuously and stably transported to distant destinations. Even if the solidified large-sized mud is mixed in the mud, the impact such as a hopper can be softened and a drop impact can be softened and processed smoothly, and the material can be finely kneaded, fluidized, and efficiently transported. Wear of the screw conveyor is reduced.

[Brief description of drawings]

FIG. 1 is an overall side view of a mud discharging device mounted on a dredging barge according to an embodiment of the present invention.

FIG. 2 is an overall plan layout view of a mud discharge device mounted on a dredging barge according to an embodiment of the present invention.

FIG. 3 is an overall side view of a mud discharging device according to an embodiment of the present invention.

FIG. 4 is a vertical sectional view taken along line AA of FIG. 3;

5 is a vertical cross-sectional view taken along the line BB of FIG.

FIG. 6 is a plan view taken along line CC of FIG.

FIG. 7 is an enlarged cross-sectional side view of essential parts of the cushion device according to the embodiment of the present invention.

FIG. 8 is a cross-sectional plan view of the cushion device according to the embodiment of the present invention.

FIG. 9 is a side view of essential parts of the screw conveyor according to the embodiment of the present invention.

10 is a front view taken along the line DD of FIG.

FIG. 11 is a side view of the mud pressing plate of the screw conveyor according to the embodiment of the present invention.

[Explanation of symbols]

 10 Dredging Ship 10A Soil Ship 12 Backhoe Equipment 14 Operating Room 16 Compressor 30 Hopper 32 Grizzly (or Bar Screen) 40 Cushion Device 42 Fixing Plate 42a Cavity 44 Rotating Paddle 44a Rotating Blades 44b Bearing 45 Mounting Frame 46 Buffer Device 46a Compression Spring ( Or a leaf spring) 47 Reduction motor 50 Vibrating sieve 60 Kneading device 60a Discharge pipe 62 Casing 64 Rotating paddle 64a Rotating blade 66 Screw conveyor 66a Screw blade 66b Screw shaft 68 Mud pressing plate 68a Bolt 68b Nut 70 Stand 69a Rib 70 A Discharge pipe Shutter 80 Pressurizing pump 90 Ejector 100 Mud discharging device 110 Check valve 120 Gamma-ray density meter 130 Transparent monitoring tube

Claims (5)

[Claims] 1. A mud discharge device for discharging mud containing a large mass of solidified mud, comprising a hopper for receiving the mud, a mud cushion device arranged in the hopper, and a hopper for the mud. A vibrating screen disposed below to remove foreign substances mixed in the mud, a kneading device disposed below the vibrating screen to knead the mud that has passed through the vibrating screen, and a mud discharge port of the kneading device. And a pressurizing pump and an ejector for compressed air provided in the discharge pipe connected to a mud discharge port of the screw conveyor, and the cushion device includes the hopper. A comb-teeth-shaped fixed plate having a plurality of cavities extending substantially horizontally and fixedly arranged in parallel to each other at equal intervals on the left and right, and horizontally arranged on both sides of the fixed plate. Equipped with multiple rotary vanes that sweep through each cavity And a pair of left and right rotating paddles, wherein the screw conveyor is composed of a plurality of removable wear-resistant materials made of a plurality of detachable wear-resistant materials facing the upstream side in the screw blade rotation direction at regular intervals on the outer periphery of the screw blades. A mud discharge device characterized by being provided with. 2. The mud discharging device according to claim 1, wherein a cushioning device including a plurality of compression springs or leaf springs is provided below the cushion device. 3. The mud discharge device according to claim 1 or 2, wherein a plurality of grizzly or bar screens arranged in parallel or in a grid pattern are provided at the mud receiving port in the upper part of the hopper. 4. The mud discharge device according to claim 1, further comprising a check valve for preventing mud backflow between the pressurizing pump and the ejector. 5. The mud discharge device according to claim 1, wherein a gamma ray density meter or a transparent monitoring pipe is provided in the discharge pipe.