JP7454162B2 - System for removing sediment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a system for removing sediment accumulated at river mouths and ports.

In dam lakes, regulating ponds, reservoirs, etc., the water storage capacity decreases due to the accumulation of sediment on the bottom of the water, so it is necessary to remove the accumulated sediment. Dredging systems that use ejector pumps, such as those disclosed in Patent Documents 1 to 3, are known as systems that continuously and efficiently remove sediment accumulated on the bottom of the water. This dredging system includes a high-pressure pump, an ejector device, a suction pipe, a fluid injection device, and a sand removal pipe, and the ejector is driven together with the fluid injection device to mix sediment at the bottom of the water with the fluid injected by the fluid injection device. The sand is then sucked into the ejector through the suction pipe, and then forced into the sand discharge pipe. Since such ejector pumps use negative pressure from jet water to perform suction and transport, they have the advantage of being more durable and less likely to become clogged since there is no impeller wear compared to sand pumps. be.

Japanese Patent Application Publication No. 2013-53437 Japanese Patent Application Publication No. 2014-148790 JP2014-227671A

However, with the conventional dredging system described above, when actually carrying out sediment removal treatment at a site such as a dam lake, in addition to materials such as a high-pressure pump, ejector device, suction pipe, and fluid injection device, the high-pressure pump must be driven. It was necessary to load the generator onto a truck, transport it to the site, and assemble it with these materials on site.

On the other hand, waves can cause large amounts of sediment to flow from the coast to the river mouth and accumulate there, blocking the river mouth. In order to eliminate these blockages, it is necessary to remove accumulated sediment at the river mouth. In addition, the accumulation of sediment in harbors and fishing ports due to waves may obstruct the departure and return of ships, and in such cases, it is necessary to remove the accumulated sediment in harbors and fishing ports. Furthermore, when flood damage occurs due to river flooding, tsunamis, storm surges, etc., it is necessary to remove accumulated sediment at the site where the flood damage occurred.

As described above, there are a wide variety of situations in which the removal of accumulated sediment is required, and in particular, when the accumulation of sediment is caused by changes in the weather such as the passage of a low pressure system, mobility and quick response are required. It will be done.

One of the objects of the present invention is to provide a system that can perform sediment removal processing with high mobility and high responsiveness in various situations where removal of accumulated sediment is required.

According to one aspect of the present invention, there is provided a system for treating accumulated sediment, the system comprising:
A vehicle equipped with an engine and a pump device that can be driven by the engine;
an ejector device loaded on the vehicle that generates suction force by using negative pressure generated by pumping water from the pump device;
has
The ejector device has a water supply port, a discharge port, and a suction port, and generates the suction force at the suction port by force-feeding water from the pump device to the water supply port, and contains earth and sand from the suction port. configured to suck water and discharge water containing the sucked earth and sand from the discharge port;
system is provided.

According to the present invention, dirt can be removed with high mobility and high responsiveness in various situations where removal of accumulated dirt is required.

FIG. 1 is a perspective view of a system according to an embodiment of the invention. 2 is a diagram schematically showing the main structure of a pump device included in the vehicle shown in FIG. 1. FIG. 3 is a diagram illustrating the operation of the pump device shown in FIG. 2. FIG. 3A to 3C are diagrams illustrating the operation of the pump device shown in FIG. 2 . 3 is a diagram illustrating the operation of the pump device shown in FIG. 2. FIG. FIG. 2 is a perspective view of an example of an ejector device included in the vehicle shown in FIG. 1. FIG. FIG. 2 is a diagram illustrating a case where the system shown in FIG. 1 is used to remove sediment accumulated at an estuary. FIG. 2 is a diagram illustrating a case where the system shown in FIG. 1 is used to remove soil accumulated in a port. It is a view similar to FIG. 5A but viewed from a different direction from FIG. 5A. FIG. 2 is a perspective view of an example of an attachment that can be used to remove earth and sand accumulated in a harbor, as seen from the back side. It is a perspective view seen from the front side of an example of an attachment which can be used for removing earth and sand accumulated in a harbor. It is a figure which shows the other form of removal of the earth and sand accumulated in a harbor. It is a figure which shows the usage form of an ejector apparatus (a plurality of ejector apparatuses are connected in parallel) at the time of using the vehicle equipped with the several pump apparatus which each has several water discharge ports. FIG. 3 is a diagram illustrating a usage form of an ejector device (water is intensively supplied to one ejector device) when a vehicle equipped with a plurality of pump devices each having a plurality of water discharge ports is used. It is a figure which shows the usage form of an ejector apparatus (a plurality of ejector apparatuses are connected in series) at the time of using the vehicle equipped with the several pump apparatus which each has several water discharge ports.

Referring to FIG. 1, a system for treating sediment deposits is shown in accordance with one embodiment of the present invention having a vehicle 100, an ejector device 130, a portable pump 140, a hose 150, and piping 160. Vehicle 100 includes an engine 110 that provides its own power, and a pump device 120 that can be driven by engine 110. In this way, the ejector device 130, the portable pump 140, the hose 150, and the piping are each loaded on the vehicle 100. As the vehicle 100, a fire pump vehicle can be preferably used because it is equipped with a pump device 120 that can be driven by an engine 110 and can load various materials. The details of each part and the usage pattern of this system will be explained below.

[Pump device]
As shown in FIG. 2, the pump device 120 includes a high-pressure pump 121 including a casing housing an impeller 125, and a vacuum pump 122 connected to the high-pressure pump 121. Impeller 125 is connected to shaft 111. The shaft 111 is a P.R. mounted on the vehicle 100 (see FIG. 1). T. O (power take-off), so that the power of the engine 110 (see FIG. 1) can be taken out as the power of the impeller 125, that is, the power of the high-pressure pump 121. The high-pressure pump 121 is provided with a water inlet 121a, a water outlet 121b, and a relay port 121c. When the impeller 125 is driven, water is sucked into the high-pressure pump 121 from the water inlet 121a, and the sucked water is transferred to the water outlet 121b. released from. The relay port 121c is connected to another pump device and used for relay water supply. A cock (not shown) is provided in each of the water intake port 121a, the water discharge port 121b, and the relay port 121c.

The vacuum pump 122 is a pump used to reduce the pressure inside the high-pressure pump 121 at the start of operation of the pump device 120, and is connected to the high-pressure pump 121 at the upper part of the high-pressure pump 121 via a connecting pipe 126. The shaft 111 is provided with an electromagnetic clutch 124 for switching power on and off to the vacuum pump 122. The electromagnetic clutch 124 is mechanically connected to the vacuum pump 122 via a power transmission mechanism 127, and when the electromagnetic clutch 124 is connected, the power of the shaft 111 is transmitted to the vacuum pump 122 and the vacuum pump 122 operates. When the electromagnetic clutch 124 is disengaged, the power of the shaft 111 is cut off and the vacuum pump 122 is configured to stop.

Next, the operation of the pump device 120 will be explained. Before the pump device 120 operates, the interior of the high-pressure pump 121 is empty. Further, a hose is connected to the water intake port 121a, and the high-pressure pump 121 is connected to a water source via this hose. In this case, the cock of the relay port 121c is closed.

First, P. T. The high-pressure pump 121 is operated by rotating the impeller 125 via the shaft 111 using the power of the engine 110. When the vacuum pump operation switch is turned on in this state, the electromagnetic clutch 124 is connected and the vacuum pump 122 is activated. When the vacuum pump 122 operates, the air inside the high-pressure pump 121 is sucked out, and the pressure inside the high-pressure pump 121 is reduced, as shown in FIG. 2A.

As the pressure inside the high-pressure pump 121 is reduced, water is pushed by atmospheric pressure and flows into the high-pressure pump 121 through the water suction pipe 121a, as shown in FIG. 2B. A vacuum pump stop switch 128 is provided on the inside upper part of the high pressure pump 121 and is activated when the water level inside the high pressure pump 121 rises and the high pressure pump 121 is filled with water. As a result, the electromagnetic clutch 124 is disengaged, and the vacuum pump 122 is stopped. Therefore, water does not enter the vacuum pump 122.

Thereafter, by the operation of the impeller 125, water from the water source is sucked into the high-pressure pump 121 from the water intake port 121a, and is discharged from the water discharge port 121b. A blockage valve (not shown) that is normally closed but opens when the internal pressure of the high-pressure pump 121 becomes higher than a predetermined value may be provided at the connection portion of the high-pressure pump 121 with the water discharge port 121b. Thereby, it is possible to efficiently replace air with water when the high-pressure pump 121 starts operating, and to discharge water from the water discharge port 121b.

[Ejector device]
The ejector device 130 will be explained with reference to FIG. 3. The ejector device 130 is a structure having a first pipe section 131 and a second pipe section 132 and having no operating mechanism. The first pipe portion 131 is a straight pipe-shaped portion with one end and the other end serving as a water supply port 131a and a discharge port 131b, respectively. The second tube portion 132 is a portion connected to the first tube portion 131 at an intermediate portion in the length direction of the first tube portion 131 so as to intersect with the first tube portion 131 .

Power water is supplied to the first pipe portion 131 from the water supply port 131a. The power water supplied to the first pipe portion 131 flows toward the discharge port 131b and is discharged from the discharge port 131b. This flow of power water within the first tube section 131 generates negative pressure in the second tube section 132, and a vacuum suction force acts toward the first tube section 131 from the suction port 132a. This vacuum suction force can be used to suck up accumulated earth and sand, as will be described in detail later. The sucked earth and sand are discharged from the discharge port 131b together with the power water flowing through the first pipe section 131.

When the ejector device 130 is used, the water inlet 131a is connected to the water outlet 121b of the pump device 120 described above via the hose 150a, and the water discharged from the pump device 120 is used as power water for the ejector device 130. A nozzle member (not shown) for generating a jet water flow in the first pipe portion 131 may be fitted into the water supply port 131a. Thereby, a larger vacuum suction force can be generated by the suction port 132a.

Further, when the ejector device 130 is used, hoses 150b and 150c are also connected to the discharge port 131b and the suction port 132a, respectively. The hose 150b connected to the discharge port 131b is for guiding the sucked earth and sand to an appropriate location and discharging it. If the distance from the ejector device 130 to the place where the earth and sand is discharged is long, multiple hoses may be connected, hoses and piping may be combined as necessary, or piping may be used instead of hoses. May be connected. The hose 150c connected to the suction port 132a has its tip disposed near the dirt to be sucked, thereby guiding the suction port 132a to the dirt to be sucked. An appropriate attachment may be attached to the tip of the hose 150c connected to the suction port 132a to facilitate suction of accumulated earth and sand. Further, as for the hose connected to the suction port 132a, as in the case of the discharge port 131b, a plurality of hoses may be connected, or hoses and piping may be combined as necessary. You may connect piping instead.

[Portable pump]
When performing soil removal work at a site that the vehicle 100 cannot reach, the portable pump 140 is unloaded from the vehicle 100 and transported to the vicinity of the site, and is installed in the ejector device 130 in place of the pump device 120 provided in the vehicle 100. Used as a pump to supply powered water. The drive method of the portable pump 140 may be an internal combustion engine drive method or a battery drive method, but a high output is required to more effectively suck the earth and sand by the ejector device 130; Considering that it may take a long time to remove the earth and sand, an internal combustion engine drive method is preferable.

[Piping]
As mentioned in the description of the ejector device 130, the piping 160 is used for water conveyance in combination with a hose or by itself. In this specification, the term "hose" can be used in any arbitrary bend. The term "piping" is used to refer to a tube that is flexible enough to be used, while the term "piping" is used to refer to a tube that is rigid and cannot be bent. Hoses and piping can be used depending on the location and purpose of use.

[Other additional configurations]
The system of this embodiment can further include a towed vehicle 200, as shown in FIG. Large materials, equipment, and devices that cannot be loaded onto the vehicle 100 are loaded onto the towed vehicle 200 . As an example, the towed vehicle 200 shown in FIG. 1 is loaded with a small boat.

[System usage pattern]
Some usage forms of the system described above will be described below using FIG. 1 and the like.

(Sediment removal at the river mouth)
A description will be given of a sediment removal operation when sediment is accumulated at an estuary and the estuary is blocked by the sediment, with reference to FIG. First, the vehicle 100 loaded with various materials such as the ejector device 130 and hoses 150a to 150d heads to the river mouth where the site will be located, and when the vehicle 100 arrives at the site, the ejector device 130 and hoses 150a to 150d and other materials are used for soil removal work. Necessary materials are unloaded from the vehicle 100 and preparations are made for earth and sand removal work.

In this preparation, specifically, the hoses 150a to 150c are connected to the ejector device 130 as described above, and the hose 150d is connected to the water outlet 121b of the pump device 120 (see FIG. 2). The tip of the hose 150d connected to the pump device 120 is lowered to the river R, and the water in the river R is used as a water source for the pump device 120. Also, a hole H is dug in a part of the accumulated earth and sand. The size of the hole H is such that water from the river R seeps into the hole H and accumulates therein. The tip of the hose 150c connected to the suction port 132a (see FIG. 3) of the ejector device 130 is inserted into this hole H.

When the preparation for work is completed, the pump device 120 is activated. When the pump device 120 operates, water from the river R is pumped up by the pump device 120 and continuously pumped to the ejector device 130 as power water. When water is pumped from the pump device 120 to the ejector device 130, the tip of the hose 150c is inserted into the hole H, so as explained using FIG. The earth and sand S inside is sucked together with water by the ejector device 130 and discharged from the hose 150b.

As a result, the sediment S accumulated at the river mouth is removed. As the soil S is removed, the hole H gradually becomes larger, and a waterway from the river S to the sea is formed. Furthermore, once a certain amount of earth and sand has been removed, a new hole H may be dug at a different position and the earth and sand removal work may be repeated at that position to form a waterway from the river S to the sea. . Note that, so that the earth and sand S discharged from the hose 150b does not interfere with the removal work of the earth and sand S accumulated at the river mouth, it is preferable to discharge the earth and water with the tip of the hose 150b facing away from the river mouth. Further, a nozzle (for example, a fire nozzle) may be attached to the tip of the hose 150b. By attaching a nozzle, dirt and water can be sprayed from the tip of the nozzle. In this case, the accumulated sediment S can be removed more effectively by injecting sediment and water from the tip of the hose 150b toward the accumulated sediment S so that the accumulated sediment S is washed away into the sea. .

(Sediment removal at ports)
The removal work of earth and sand deposited in the harbor due to waves and the like will be explained with reference to FIGS. 5A, 5B, etc. First, a vehicle 100 loaded with various materials heads to the site, and upon arriving at the site, materials necessary for the earth and sand removal work, such as the ejector device 130 and hoses 150a to 150d, are unloaded from the vehicle 100 to prepare for the earth and sand removal work. The connection between the ejector device 130 and the hoses 150a to 150c is the same as in the case of removing soil accumulated at the river mouth.

The tip of the hose 150d connected to the water intake port 121a (see FIG. 2) of the pump device 120 is lowered to near the sediment deposited in the sea, and the pump device 120 is driven in this state. When the pump device 120 is driven, the pump device 120 sucks seawater and pumps it to the ejector device 130 as power water. When the seawater is pumped from the pump device 120 to the ejector device 130, the ejector device 130 sucks the earth and sand together with seawater through the hose 150d by its vacuum suction action, and the suctioned earth and sand and seawater are pumped out from the pump device 120. It is discharged from the hose 150b together with the pressure-fed seawater. By performing this process while moving the position of the hose 150d, the earth and sand accumulated in the port can be removed.

In ports, the earth and sand to be removed is often located far from the quay where the vehicle 100 can pass, and in this case, the hose 150c connected to the suction port 132a (see FIG. 3) of the ejector device 130 is equipped with an appropriate part. It is preferable that an appropriate number of floats 165 be attached to. This makes it easier to guide the hose that sucks up the earth and sand onto the accumulated earth and sand, and also makes it easier to understand the position of the tip of the hose, in other words, where in the harbor the earth and sand is being removed. can. Also,. On the other hand, the hose 150b connected to the discharge port 131b (see FIG. 3) of the ejector device 130 is preferably directed away from the port so that the removed earth and sand will not flow into the port again.

An attachment 170 can be attached to the tip of the hose 150c to remove dirt more efficiently. When using the attachment 170, this attachment 170 is also loaded on the vehicle 100.

An example of attachment 170 is shown in FIGS. 6A and 6B. The illustrated attachment 170 includes a frame 171, a housing 172, a second ejector device 173, a stirring blade 174, and a motor 175.

The frame 171 fixedly supports the housing 172 and the second ejector device 173. The housing 172 is a box-like structure with an open bottom. The second ejector device 173 is configured similarly to the ejector device 130 described above, and has similar functions. A suction port of the second ejector device 173 is connected to a pipe that communicates with the inside of the casing 172 . The water inlet of the second ejector device 173 is connected to the water outlet of the pump device 120 by a hose, and the outlet of the second ejector device 173 is connected to the water outlet of the ejector device 130 installed on land by a hose. Connected. Therefore, when using the attachment 170 with such a configuration, water is supplied to the two ejector devices 130 and 173, so it is necessary that the vehicle 100 includes a plurality of pump devices 120 and/or one pump device. 120 is required to have multiple water outlets. Generally, a fire pump vehicle has a plurality of water outlets. Therefore, when removing earth and sand using the attachment 170 having the second ejector device 173, it is preferable to use the vehicle 100 based on a fire pump vehicle.

The stirring blade 174 is arranged inside the housing 172 and is configured to rotate using a motor 175 fixed to the housing 172 as a driving source. Electric power for motor 175 can be supplied from the battery of vehicle 100. Further, since the motor 175 is used under the sea, a waterproof structure is used. In the illustrated example, the attachment 170 has two stirring blades 174, but the number of stirring blades 174 may be arbitrary. Moreover, the structure of the stirring blade may also be arbitrary.

The attachment 170 configured as described above is submerged in the sea at a predetermined location where there is earth and sand to be removed. Then, when the pump device 120 is driven, seawater is pumped from the pump device 120 to the second ejector device 173, and the vacuum suction action generated in the second ejector device 173 causes the seawater in the housing 172 to be pumped into the second ejector device 173 along with the earth and sand. 2 ejector device 173, and is discharged to the next stage ejector device 130 through the hose 150c. In the next stage ejector device 130, the earth and sand and seawater discharged from the second ejector device 173 are sucked into the ejector device 130 by the vacuum suction action generated by the seawater pumped from the pump device 120, and are pumped out from the pump device 120. It is discharged from the hose 150b together with seawater.

In this way, since the attachment 170 has the second ejector device 173, the second ejector device 173, which is a suction means, can be placed at a position close to the earth and sand that is the target of suction. Generally, the suction force exerted by the ejector device becomes weaker as the distance from the object to be suctioned increases. Therefore, by attaching the second ejector device 173 to the attachment 170, the accumulated earth and sand can be more effectively sucked.

On the other hand, while the second ejector device 173 is sucking and removing the earth and sand, the motor 175 is driven and the stirring blade 174 is rotated. When the stirring blade 174 rotates, the seawater inside the housing 172 is stirred, and the accumulated earth and sand is stirred up under the housing 172. Thereby, the second ejector device 173 can more effectively suck the earth and sand.

In the example described above, the attachment 170 includes a second ejector device 173 and a stirring blade 174. However, the attachment 170 may include only either the second ejector device 173 or the stirring blade 174.

FIG. 7 shows another method for removing sediment accumulated in a harbor. In the illustrated embodiment, a float barge 180 and a small boat 190 are further used. The float barge 180 and the small boat 190 can be loaded onto the towed vehicle 200 shown in FIG. 1 and transported to the site.

The float barge 180 is for assisting the suction of soil by allowing a worker to operate the hose for sucking the soil or the attachment 170 on the float barge 180. be. Small boat 190 is used to move float barge 180 to a destination location. The small boat 190 may be, for example, a rubber boat with an engine.

Removal of sediment accumulated in a harbor requires work at sea, away from the quay, which limits the ability to arbitrarily change the location of the removal work. Therefore, by using the float barge 180, it becomes possible for the worker to arbitrarily change the position of the hose and attachment for sucking the earth and sand on the float barge 180, and by using the small boat 190, It becomes possible to move the float barge 180 arbitrarily, and as a result, the work of removing earth and sand over a wide range can be performed efficiently and easily. The float barge 180 may be equipped with an engine so that it can move arbitrarily by itself.

When using the attachment 170 (see FIG. 6A etc.) to remove earth and sand, the float barge 180 can include a support mechanism that supports the attachment 170 and a movement mechanism that moves the attachment 170. When removing sediment that has accumulated in a port, it may be necessary to remove the sediment over a relatively wide area. In that case, the work will be done while moving the attachment 170. Moving the attachment 170 involves the work of once raising the attachment 170, moving the attachment 170 in that state to the next location, and then lowering it again. Furthermore, when moving the attachment 170 to the next location, if the movement distance is short, it is more efficient to move the attachment 170 on the float barge 180 than to move the float barge 180. Therefore, by providing the float barge 180 with a support mechanism that supports the attachment 170 and a movement mechanism that moves the attachment 170, the burden on the operator associated with the movement of the attachment 170 can be reduced.

[Connection form of multiple ejector devices]
As described above, a fire pump vehicle generally has a plurality of water outlets, so when a fire pump vehicle is used as the vehicle 100, a plurality of water outlets can be used. Furthermore, it is also possible to load a plurality of ejector devices 130 on the vehicle 100. Therefore, when a fire pump car is used as the vehicle 100, some embodiments that can more efficiently remove earth and sand using these plurality of water outlets are shown below.

(Connect multiple ejector devices in parallel)
FIG. 8A shows a configuration in which a plurality of ejector devices 130 are connected in parallel. In the form shown in FIG. 8A, the vehicle 100 includes a pump device having a total of four water outlets, two on each side of the left and right sides (the configuration of the vehicle 100 is the same in the following forms). Four ejector devices 130-a, 130-b, 130-c, and 130-d are independently connected to each water outlet. By connecting a plurality of ejector devices independently and in parallel in this way, it is possible to achieve a soil removal capacity proportional to the number of connected ejector devices. Although one vehicle is used in FIG. 8A, a plurality of ejector devices may be connected in parallel using a plurality of vehicles.

(Water is intensively supplied to one ejector device)
FIG. 8B shows a configuration in which the water supply is concentrated in one ejector device 130. In the form shown in FIG. 8B, the hoses connected to each water outlet of the pump device are connected to one ejector device 130 in a collected state. This allows the ejector device 130 to generate a larger vacuum suction force. This embodiment is effective when a larger vacuum suction force is required, such as when removing large-sized earth and sand. Note that although one vehicle is used in FIG. 8B, water can also be intensively supplied to one ejector device using a plurality of vehicles.

(Multiple ejector devices arranged in series)
FIG. 8C shows a configuration in which a plurality of ejector devices 130 are connected in series. In the form shown in FIG. 8C, the water supply port of the ejector device 130 is connected to each discharge port of the pump device, and the discharge port of the first stage ejector device 130-a is connected to the suction port of the next stage ejector device 130-b. A plurality of ejector devices 130-a, 130-b, 130-c are connected to each other, and the water supply port of the ejector device 130-b is further connected to the suction port of the next stage ejector device 130-c. , 130-d are connected in series. According to such a configuration, only the first stage ejector device 130-a sucks the accumulated earth and sand, but the earth and sand sucked by the first stage ejector device 130-a is transferred to the next stage ejector device 130-b. After being transported, it is further sequentially transported to the next stage ejector device 130-c, and finally discharged from a hose connected to the discharge port of the final stage ejector device 130-d. This embodiment is effective when transporting accumulated earth and sand to a longer distance. Although one vehicle is used in FIG. 8C, a plurality of ejector devices may be connected in series using a plurality of vehicles.

[Other forms]
Although some typical embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and various modifications are possible.

(vehicle)
A common vehicle is a vehicle that runs on pneumatic tires, but there are times when it is necessary to transport various materials to places where it is difficult to drive with pneumatic tires. In preparation for such a case, the vehicle can also be a tracked vehicle. Moreover, the vehicle may be a vehicle with a telescoping boom. When a vehicle with a telescoping boom is used as the vehicle, for example, in removing soil accumulated in a harbor, a hose that sucks the soil can be hung from the tip of the telescoping boom to perform the soil removal work. Thereby, the suction location of earth and sand can be arbitrarily and easily changed without using a float barge or a small boat as long as it is within the telescopic range of the telescopic boom. Vehicles with telescoping booms include ladder trucks and crane trucks.

(Monitoring and remote control of sediment removal)
It is also possible to attach a camera (not shown) to the tip of the hose or the above-mentioned attachment, and monitor the dirt removal status using images taken by the camera. This makes it easy to understand how much soil has been removed. The image taken by the camera may be a moving image or a still image. Images taken by the camera can be sent to, for example, a computer and displayed on an appropriate display. However, since the camera itself is placed underwater, a camera with waterproof performance is used. Furthermore, when using the attachment 170 described above, the operation of the second ejector device 173 and the operation of the stirring blade 174 can be remotely controlled while monitoring the soil removal status using images taken with a camera.

100 Vehicle 110 Engine 111 Shaft 120 Pump device 121 High pressure pump 121a Water intake port 121b Water outlet 122 Vacuum pump 124 Electromagnetic clutch 125 Impeller 126 Connection pipe 127 Power transmission mechanism 128 Vacuum pump stop switch 130 Ejector device 131 First pipe portion 131a Water port 131b Discharge port 132 Second pipe section 132a Suction port 140 Portable pump 150, 150a to 150d Hose 160 Piping 165 Float 170 Attachment 171 Frame 172 Housing 173 Second ejector device 174 Stirring vane 175 Motor 180 Float barge 190 Small ship 200 covered Tractor

Claims (11)

A system for processing accumulated sediment,
a pump vehicle equipped with an engine and a pump device that can be driven by the engine;
an ejector device mounted on the pump vehicle that generates suction force by using negative pressure generated when water is pumped from the pump device;
has
The ejector device has a water supply port, a discharge port, and a suction port, and generates the suction force at the suction port by force-feeding water from the pump device to the water supply port, and contains earth and sand from the suction port. configured to suck water and discharge water containing the sucked earth and sand from the discharge port ,
The pump device includes a high pressure pump and a vacuum pump,
The high-pressure pump is provided with a water intake port and a water discharge port that is connected to the water supply port when the ejector device is used,
The vacuum pump is provided so that power of the engine can be switched between the vacuum pump and the high-pressure pump, and the high-pressure pump is filled with water by reducing the pressure inside the high-pressure pump and sucking water from the water intake port. configured as,
system. The ejector device includes a first portion having one end serving as the water supply port and the other end serving as the discharge port; 2. The system of claim 1, wherein the system is a non-movable tubular structure having a second portion having a suction port. 3. The system according to claim 1, wherein the engine is a power source of the pump vehicle itself, and is configured such that power from the engine can be extracted as power for the pump device. The system according to any one of claims 1 to 3, wherein the pump device has a plurality of the water discharge ports. 5. The system of claim 4, wherein the pump vehicle is loaded with a plurality of the ejector devices. further comprising an attachment loaded on the pump vehicle ,
The attachment is
A housing with an open bottom,
a second ejector device having the same configuration as the ejector device, the second ejector device having a suction port communicating with the casing;
a stirring blade disposed within the housing;
has,
The system according to any one of claims 1 to 5. The system according to any one of claims 1 to 6, further comprising a portable pump mounted on the pump vehicle . further comprising a towed vehicle towed by the pump vehicle ,
a float barge is loaded on the towed vehicle;
The system according to any one of claims 1 to 7. The system according to any one of claims 1 to 8, wherein the pump vehicle is a tire-type vehicle. The system according to any of claims 1 to 8, wherein the pump vehicle is a tracked vehicle. The system according to any one of claims 1 to 10, wherein the pump vehicle is a vehicle with a telescopic boom.

Images