JPH0663261B2 - Method and apparatus for pumping earth and sand - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention mainly relates to a method and an apparatus for sending sediment used for sending sediment dredged by a backhoe or a grab bucket to a landfill, a sediment disposal site, or the like. It is about.

[Conventional technology]

Conventionally, in order to pressurize the dredged soil with a backhoe or grab bucket, etc. to a predetermined place, the wires, ropes, shrubs, stones and other obstacles contained in the dredged sand are removed with a screen, etc., and then kneaded. The sand was fluidized by kneading with an apparatus, and then it was carried into a batch type pressure-feeding tank and pressure-fed.

Therefore, in the conventional pressure-feeding method for earth and sand, an obstacle removing device such as a screen, a kneading device, and a pressure-feeding device such as a plurality of pressure-feeding tanks are required separately, and usually, these respective devices are arranged on a pontoon. Therefore, a very large barge is required.

In addition, since the above-mentioned pressure-feeding tank is not a continuous operation but a batch operation, while the sediment is being sent by one pressure-feeding tank, the sediment is carried into another one of the pressure-feeding tanks. Groups are needed.

Therefore, the equipment for pumping the sediment becomes large, and at the time of dredging in a river or lake, depending on the location, there is a problem that a berth equipped with these equipment cannot be arranged.

In particular, in order to pump dredged sand using a pressure-feeding pipe for a long distance, the scale of each device becomes large, and the drive source also increases, and further, if a large barge cannot be placed, There is also a problem that the pumping distance of sediment will be limited.

[Problems to be Solved by the Invention]

The present invention has been made to solve the above-mentioned conventional problems, and provides a compacting method, and a compacting method, and a compacting device capable of compacting a long distance for compacting and pumping soil and sand, and a device therefor. This is an issue.

[Means for Solving the Problems]

As a means for solving the above problems, the method of pumping sediment according to the present invention, when pumping sediment by a pump for pumping sediment, using a spiral pressure vane wheel as the pump for pumping sediment, The soil that has been fluidized by agitation in advance is sucked into the suction port of the pressure impeller, and at the same time, it is pressure-fed into the pressure feeding pipe connected to the discharge port of the pressure impeller via the check valve, and is fed into the pressure feeding pipe. The earth and sand is formed by a method of pressure of earth and sand which is mixed and sent together with the pressurized air by discharging pressurized air in the direction of sending the earth and sand. A conveying means for supplying to the suction port of a spiral pressure impeller for pressure-feeding earth and sand while stirring is provided, and a pressure-feed pipe is connected to the discharge port of the pressure-impeller via a check valve. A pressurized air discharge port is provided on the It is.

The present invention configured as described above, when the dredged soil is pressure-fed from the popper to the sand-pressure pump, a spiral pressure wheel having a suction and discharge function is used as the soil-pressure pump, so that The pump can be compactly assembled without lengthening, and the fluidized earth and sand or compressed air from the pressure feed pipe side connected to the discharge side can be continuously supplied to the earth and sand through the check valve without backflow. You can Further, the pressure impeller itself can pump the earth and sand even if it is a drive source with a small capacity.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view of the arrangement of a soil and sand pumping apparatus according to an embodiment of the present invention shown in a partial cross section, and FIG.

First of all, this pumping device is not shown in its entirety.
It is mounted on the top, and the soil S dredged by a backhoe, a grab bucket, or the like (not shown) is pressure-fed to a predetermined place such as a soil disposal site through the pressure-feeding pipe 1 in the direction of arrow S.

Therefore, on the upper part of the hopper 2 that receives the dredged soil S,
An obstacle H such as a wire, rope, shrub, or stone in the earth and sand S is provided with a vibrating screen 3 as an excluding means, and an opening 4 for dropping the obstacle H is provided in a hopper 2 on the end side of the vibrating screen 3. In addition, a sediment receiving chute 5 for receiving the sediment S and dropping it below the hopper 2 is provided in the lower portion of the vibrating screen 3 on the end side.

It is to be noted that reference numeral 6 in FIG. 1 denotes a driving motor for the vibrating screen 3.

Next, as shown in FIG. 1 and FIG. 2, an agitator 8 rotated by a hydraulic motor 7 is arranged below the hopper 2, and a screw feeder 9 for conveying the earth and sand S in the direction of arrow T is further arranged below the agitator 8. It is arranged on the left and right in two rows and is rotated by a hydraulic motor 13.

In addition, as another means for removing the obstacle H in the earth and sand S above the discharge side end of the screw feeder 3,
An obstacle removing roller 10 having a spiral-shaped projection or groove that rotates at high speed is provided, and a spiral pressure impeller 12 that is rotated by a motor 11 is provided above the obstacle removing roller 10 as a pump for feeding sediment S. Is provided.

The obstacle removing rollers 10 are arranged in a plurality of rows, and
As shown in FIG. 3 showing the II-II direction in the drawing, by rotating the roller having the projection 10A or the groove at a high speed by the hydraulic motor 16, only the sand S from the gap between the rollers is pressed by the hydraulic impeller.
Obstacles H, such as relatively small dust, which are sucked by the 12 and not removed by the vibrating screen 3 contained in the earth and sand S are sucked by the pressure impeller 12 along the rotation direction of the protrusion 10A. Obstacles H that have moved to the outside of the range, dropped downwards, and accumulated to some extent in the lower part are conveyed by opening the lid 15 that is appropriately opened and closed by the gate opening / closing cylinder 14.

Next, the pressure feed pipe 1 is connected to the discharge port of the pressure impeller 12 via the check valve 17, and the pressurized air A is discharged into the pressure feed pipe 1 in the pressure feed direction indicated by the arrow of the earth and sand S. Pressurized air outlet
18 are provided.

Explaining the pumping action of the sand S of the pumping apparatus for the sand S of the present embodiment having the above-mentioned configuration, when the dredged sand S is put into the hopper 2, a relatively large obstacle H is sorted by the vibrating screen 3. Then, it falls out of the hopper 2 through the opening 4 and is removed.

On the other hand, a very small part of the earth and sand S is directed toward the opening 4 along the inclination of the vibrating screen 3, but the earth and sand S is dropped downward in the hopper 2 by the earth and sand catch chute 5.

The earth and sand S that have fallen in the hopper 2 are agitated by the agitator 8 and fluidized, and are sent to the lower side of the pressure impeller 12 which is the earth and sand pressure pump by the screw feeder 9, and the vibrating screen 3 in the earth and sand S sent. The relatively small obstacle H that could not be removed in step 1 is removed by the obstacle removing roller 10 before being sucked by the pressure impeller 12.

Next, the sediment sent by the pressure impeller 12 is
Is sent to the pressure feed pipe 1 through the check valve 17 and is sent to the pressure feed pipe 1 by the pressurized air A discharged from the pressurization air discharge port 18 and mixed pressure is sent to a predetermined place over a long distance. It will be.

When pressurized air is discharged into the pressure-feeding pipe, initially the sediment is sent downward in the pipe and the air is sent upward in the pipe.
Gradually, the surface of the earth and sand swells, the earth and sand block the inside of the pipe, and the plug is broken. While repeating, the earth and sand are pumped.

When the soil becomes plugged into the pipe, the resistance increases, and the pressurized air tries to flow backward without going in the direction of pumping the soil, but since the check valve closes, backflow of the pressurized air is prevented,
The supply of earth and sand will also be interrupted. When the state in which the plug of the earth and sand collapses collapses, the resistance decreases and the pressurized air easily flows in the direction in which the earth and sand are pumped, so the check valve opens and the earth and sand is supplied.

As described above, in the present invention, it is important to discharge the pressurized air into the pressure feeding pipe connected via the check valve in the pressure feeding direction of the earth and sand.

In the above embodiment, the vibrating screen 3 and the obstacle removing roller 10 are arranged between the hopper 2 and the pressure impeller 12 as means for removing the obstacle H in the earth and sand S. However, depending on the mixing status of the obstacles H, only one of them may be arranged at an appropriate arbitrary position, and the obstacles H other than the vibrating screen 3 or the obstacle removing roller 10 of the present embodiment. May be provided.

Further, in this embodiment, the agitator 8 and the screw feeder 9 are separately provided as a stirring / conveying means for conveying the earth and sand S from the lower part of the hopper 2 to the pressure impeller 12 side while agitating the earth and sand S. Depending on the nature of the above, it is possible to use, for example, a continuous mixer or the like in which these two wheels are integrated, and further, instead of the screw feeder 9, a conveyer such as a belt conveyor to which an appropriate stirring means is added is used. May be.

〔The invention's effect〕

According to the sediment feeding device of the present invention described above, the entire series of equipment is integrated into a very compact device, and in the device, removal of obstacles in the sediment, agitation fluidization of the sand and sediment It is possible to perform continuous pressure feeding, and it is possible to arbitrarily select the location of the pressure feeding apparatus, and it is possible to place the pressure feeding apparatus even in a place where a large barge cannot be placed, such as a river or lake.

Moreover, since a spiral pressure impeller with a suction and discharge function was used as a pump pressure feeding means for the soil fluidized by agitation, it became more compact without lengthening, and the pressure impeller itself Since it is possible to prevent the backflow of the earth and sand supplied into the pressure feeding pipe through the stop valve and the backflow of the pressurized air of the pressure feeding pipe to the pressurizing impeller side, even if the drive source has a small capacity, It becomes possible to continuously and reliably perform pressure feeding.

Further, when the pressure feeding pipe is clogged with earth and sand, the check valve is closed by the pressurized air, so only the pressurized air is fed into the pressure feeding pipe, and as a result, the clogging inside the pipe is eliminated and smooth pressure feeding work is performed. There is also an effect that you can.

[Brief description of drawings]

FIG. 1 is a side view of an arrangement of the embodiment of the present invention, showing a partial cross section, and FIG. 2 is a front view of the main part shown in the right half cross section in the direction I-I of FIG. 1, FIG. Is II- in Figure 1.
FIG. 4 is a front view of a main part shown in a left half cross section in a II direction. 1 ... Pressure feeding pipe, 2 ... Hopper, 3 ... Vibrating screen, 8 ... Stirrer, 9 ... Screw feeder, 10 ...
Obstacle removal roller, 12 …… Pressurizing impeller, 17 …… Check valve, 18
...... Pressurized air discharge port, H ... Obstacle, S ... Sediment.

Claims (3)

[Claims] 1. When the earth and sand is pumped by a sand and sand pump, a spiral pressure vane is used as the sand and sand pump, and the sand that has been fluidized by stirring in advance is sucked by the sand vane. In addition to suctioning to the mouth, the pressure is fed to the discharge port of the pressure impeller through a check valve and fed into the pressure feed pipe, and the earth and sand is fed into the pressure feed pipe, and pressurized air is supplied in the pressure feed direction of the earth and sand. A method for pumping earth and sand by discharging and discharging the mixed air together with the pressurized air. 2. A conveying means for supplying the sediment from the lower part of a hopper for receiving the sediment to the suction port of a spiral pressure impeller for pressure-feeding the sediment, and at the discharge port of the impeller. A pressure-feeding device for earth and sand, which is connected to a pressure-feeding pipe via a check valve, and has a pressurized air outlet in the pressure-feeding pipe in the direction of pressure-feeding the earth-sand. 3. A sediment feeding apparatus according to claim 2, further comprising means for removing obstacles in the sand between the conveying means and the pressure impeller.