JP2021038040A - Sediment conveying system and sediment conveying method - Google Patents

Abstract

To provide a sediment conveying system and a sediment conveying method capable of enhancing handleability and improving suction force of sediment to efficiently convey the sediment.SOLUTION: The sediment conveying system is a sediment conveying system 1 for conveying sediment B and includes an ejector 20 having a suction port 20b for sucking the sediment B and a suction hose member 10 connected to the suction port 20b and extending from the suction port 20b to at least partially include a flexible hose 11; the suction hose member 10 includes a sediment suction port 14 formed at an end face 12b positioned at a side opposite to the ejector 20 and an air suction port formed on a side surface facing a direction intersecting the end face 12b.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a sediment transport system and a sediment transport method for transporting sediment.

Conventionally, various earth and sand transfer systems and earth and sand transfer methods have been known. Japanese Patent No. 6198482 describes a power transport device that transports materials by power. The power transport device includes a transport pipe for transporting materials and an ejector provided in the middle of the transport pipe. The ejector is connected to the air compressor via a solenoid valve. Further, an inflow pipe for flowing gas into the inside of the transport pipe is connected in the middle of the transport pipe, and the inflow pipe is an elbow pipe formed in an L shape in a side view.

Further, a plurality of adjusting means for adjusting the mixing ratio of the material and the gas are provided in the middle of the transport pipe, and each adjusting means includes a gas intake port formed in the transport pipe and a gas intake port. A mesh filter that covers the mesh filter and an outside air volume regulator that covers the mesh filter are provided. The outside air volume regulator has a horseshoe shape made of metal and can open and close the gas intake port. Each adjusting means adjusts the mixing ratio of the material inside the transport pipe and the gas to suppress the clogging of the material inside the transport pipe.

Japanese Unexamined Patent Publication No. 2017-72037 describes an earth and sand carry-out system for removing earth and sand that protects a cable. The carry-out system includes a plurality of suction pipes for sucking earth and sand, a suction device for entering the earth and sand sucked by the suction pipes, and a plurality of ejectors interposed between the plurality of suction pipes.

A compressed air supply pipe is connected to each of the plurality of ejectors via an air valve. Compressed air is supplied to the compressed air supply pipe from the compressor, and the compressed air is supplied to each ejector via the air valve. The suction device and the compressor are provided on the ground, and the suction pipe and the compressed air supply pipe extend underground from each of the suction device and the compressor. A plurality of ejectors are provided underground, and by supplying compressed air from a compressed air supply pipe to each ejector via an air valve, underground earth and sand are sucked into the suction pipe by negative pressure.

Japanese Patent No. 6198482 JP-A-2017-72037

As described above, in the earth and sand transport system and the carry-out system provided with the ejector, it is possible to transport the earth and sand by compressed air. However, since the ejector is heavy and inconvenient to carry, it is often used by being fixed, such as by interposing it in the middle of a pipe. Therefore, when sucking earth and sand from the ejector, it may not be possible to transport the earth and sand unless the earth and sand are moved to the suction port of the ejector. Further, when a plurality of ejectors are fixed, it takes time to install the ejectors and the configuration of the earth and sand transport system becomes complicated. Therefore, there is room for improvement in terms of handleability of the earth and sand transport system.

By the way, a method of attaching a flexible extension hose to an ejector that sucks earth and sand and sucking earth and sand from the extension hose can be considered. In this case, the extension hose can be flexibly moved and can suck the earth and sand from a wide range of places, so that there is an advantage that the handleability is improved. However, the longer the length of the extension hose, the longer the distance from the ejector, which may cause a problem that the suction force of earth and sand decreases.

It is an object of the present disclosure to provide an earth and sand transfer system and an earth and sand transfer method capable of enhancing the handleability and increasing the suction force of the earth and sand to efficiently transfer the earth and sand.

The earth and sand transport system according to the present disclosure is a sediment transport system that transports earth and sand, and is connected to an ejector having a suction port for sucking earth and sand and extends from the suction port, and at least a part thereof. A suction hose member including a flexible hose is provided, and the suction hose member is formed on a side surface facing a direction intersecting the end face with a sediment suction port formed on an end face located on the opposite side of the ejector. It has an air suction port.

This earth and sand transport system includes a suction hose member that extends from the suction port of the ejector and includes at least a part of a flexible hose. Therefore, since the suction hose member extending from the suction port of the ejector includes the flexible hose, the suction hose member can be flexibly moved, so that the handleability can be improved. That is, the suction hose member can be flexibly moved, and the earth and sand can be sucked from the suction hose member without moving the earth and sand to the suction port of the ejector. It can be carried out. Further, the suction hose member has an earth and sand suction port for sucking earth and sand on the end surface on the opposite side to the ejector, and an air suction port on the side surface facing the direction intersecting the end surface. By sucking earth and sand from the earth and sand suction port and sucking air from the air suction port, the air flow inside the suction hose member can be smoothed, so the suction force of earth and sand is increased and the transportation of earth and sand is efficient. Can be done well.

Further, a transport pipe extending from the downstream end of the ejector and a sediment accommodating member provided at the downstream end of the transport pipe in the sediment transport path are provided, and the earth and sand accommodating member is inside the earth and sand accommodating member. It may have an exhaust port for exhausting the air. In this case, the earth and sand sucked by the suction hose member and the ejector are accommodated in the earth and sand accommodating member through the transport pipe. Further, the air sucked from the air suction port of the suction hose member flows into the earth and sand accommodating member through the ejector and the transport pipe together with the earth and sand. Therefore, since air can be conveyed together with the earth and sand inside the suction hose member, the ejector, and the transfer pipe, the earth and sand can be efficiently conveyed by the air flow. Further, the air that has flowed into the earth and sand accommodating member is discharged to the outside of the earth and sand accommodating member from the exhaust port. Therefore, the air flow inside the suction hose member, the ejector, and the transport pipe can be made smoother, so that the sediment can be transported more efficiently.

Further, the suction hose member may be provided with a widening suction portion which is attached to the opposite side of the ejector and has a sediment suction port formed therein. In this case, since the portion where the earth and sand suction port is formed is widened, the earth and sand can be taken in more efficiently. Therefore, the suction and transportation of earth and sand can be performed more efficiently.

Further, the suction hose member is attached to the air suction port, and may include a protruding member protruding from the air suction port in a state of being attached to the air suction port. In this case, by providing the protruding member protruding from the air suction port, it is possible to prevent the air suction port from being blocked even when the air suction port is directed downward and comes into contact with the ground. Therefore, clogging of the air suction port can be suppressed more reliably.

Further, the widening suction portion may have a tubular portion provided on the suction port side of the ejector and a wide portion that is thinner than the diameter of the tubular portion and widens as the distance from the tubular portion increases. In this case, since the flow of earth and sand in the widening suction portion can be made smoother, the possibility of clogging of earth and sand can be further reduced.

Further, the widening suction portion may be a hopper into which earth and sand are put. In this case, since the earth and sand can be put into the hopper to suck and convey the earth and sand, the earth and sand can be efficiently conveyed.

Further, the earth and sand accommodating member may have a bag member for accommodating earth and sand and a container for accommodating the bag member. In this case, by accommodating the earth and sand in the bag member, more earth and sand can be accommodated in the earth and sand accommodating member. Further, since the container accommodates the bag member, the bag member accommodating the earth and sand can be stabilized by the container, so that the conveyed earth and sand can be stored in a stable state.

Further, the earth and sand accommodating member may further include a lid member that covers the container, and an exhaust port may be formed in the lid member. In this case, by covering the container in which the bag member is housed with the lid member having the exhaust port formed therein, the earth and sand storage member provided with the bag member can be efficiently installed.

Further, the lid member may have an impact mitigation portion that cushions the impact of earth and sand on the lid member. In this case, since the impact of the earth and sand conveyed from the transport pipe to the earth and sand accommodating member can be alleviated, the possibility that the earth and sand accommodating member is damaged by the impact of the earth and sand can be reduced.

The earth and sand transport method according to the present disclosure is a sediment transport method for transporting earth and sand using the above-mentioned earth and sand transfer system, and is a step of sucking earth and sand from the earth and sand suction port of a suction hose member having an air suction port to the suction hose member. It also includes a step of passing the sucked earth and sand through an ejector to convey the earth and sand.

In this earth and sand transfer method, earth and sand are conveyed by using the above-mentioned earth and sand transfer system. Therefore, the same effect as that obtained from the above-mentioned earth and sand transport system can be obtained. That is, the suction hose member can be flexibly moved to improve the handleability, and the air flow inside the suction hose member can be smoothed, so that the suction force of the earth and sand can be increased and the transportation of the earth and sand can be made more efficient. Can be done well.

According to the present disclosure, it is possible to improve the handleability and to increase the suction force of the earth and sand so that the earth and sand can be efficiently transported.

It is a figure which shows the example site to which the earth and sand transport system which concerns on embodiment are applied. (A) is a cross-sectional view showing an example of a suction hose member of the earth and sand transport system of FIG. (B) is a cross-sectional view showing an example different from FIG. 2 (a) of the suction hose member of the earth and sand transport system of FIG. (A) is a graph which schematically shows the suction force in the suction hose member of FIG. 2 (a). (B) is a graph schematically showing a suction force in a suction hose member having no air suction port. FIG. 2A is a diagram schematically showing a sediment suction port in the suction hose member of FIG. 2A. (B) is a diagram schematically showing a sediment suction port in a suction hose member having no air suction port. It is a figure which shows the example of the transport pipe and the sediment accommodating member of the sediment transport system of FIG. It is a figure which shows the tubular member and the filter of the earth and sand accommodating member of FIG. It is a figure which shows the hopper as the widening suction part of the earth and sand transport system of FIG. It is a top view which shows the widening suction part different from the widening suction part of FIG. It is sectional drawing of the widening suction part of FIG. It is a perspective view which shows the example of the widening suction part which is further different from the widening suction part of FIG. It is a figure which shows typically the earth and sand containing member different from the earth and sand containing member of FIG. It is a figure which shows the state which the lid member is detached from the container of the earth and sand accommodating member of FIG. (A) is a cross-sectional view schematically showing an earth and sand accommodating member different from the earth and sand accommodating member of FIG. (B) is an enlarged cross-sectional view of the impact mitigation portion of the earth and sand accommodating member of FIG. 13 (a).

Hereinafter, embodiments of the sediment transport system and the sediment transport method according to the present disclosure will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are designated by the same reference numerals, and duplicate description will be omitted as appropriate. In addition, the drawings may be partially simplified or exaggerated for the sake of easy understanding, and the dimensional ratios and the like are not limited to those described in the drawings.

(First Embodiment)
FIG. 1 is a diagram showing a schematic configuration of a sediment transport system 1 according to the first embodiment. As shown in FIG. 1, the earth and sand transport system 1 according to the first embodiment is used, for example, for transporting earth and sand B at a construction site A. As an example, at the construction site A, the ground G is excavated to construct a building structure, and the earth and sand B generated by the excavation is conveyed by the earth and sand transfer system 1.

Further, after the building structure is constructed, the excavated portion may be backfilled by the earth and sand B, and the earth and sand B required for the backfill may be conveyed by the earth and sand transport system 1. As described above, the earth and sand transport system 1 may be a system for transporting the earth and sand B excavated at the construction site A or the earth and sand B required for backfilling.

The earth and sand transport system 1 includes a suction hose member 10 that sucks the earth and sand B, an ejector 20 located on the downstream side of the suction hose member 10 in the earth and sand B transport path, and a transport pipe 30 through which the earth and sand B from the ejector 20 passes. The earth and sand accommodating member 40 for accommodating the earth and sand B conveyed by the transport pipe 30 is provided.

In the present disclosure, the "downstream side of an object in the soil transport path" may be simply referred to as the "downstream side", and the "upstream side of the object in the earth and sand transport path" may be simply referred to as the "upstream side". The earth and sand B sucked by the suction hose member 10 is accommodated in the earth and sand accommodating member 40 through the ejector 20 and the transport pipe 30. The "soil transport route" indicates a route through which the soil passes between the time when the soil is sucked and the time when the soil is stored. In the present embodiment, the “soil transport path” shows an example in which the suction hose member 10, the ejector 20, the transport pipe 30, and the sediment accommodating member 40.

For example, the ejector 20 is fixed to the ground G at the construction site A. The ejector 20 is provided between the suction hose member 10 and the transport pipe 30, and has a suction port 20b for sucking the earth and sand B from the suction hose member 10. The earth and sand transfer system 1 further includes a compressor 21 that generates compressed air, and a hose 22 that sends the compressed air generated by the compressor 21 to the ejector 20. Note that FIG. 1 simplifies the illustration of the ejector 20.

The ejector 20 sends the compressed air supplied from the compressor 21 through the hose 22 into the transport pipe 30. The ejector 20 accelerates the compressed air sent from the compressor 21 and creates an air flow in the transport direction D of the earth and sand B. That is, the flow of compressed air from the compressor 21 inside the ejector 20 accelerates the flow of the compressed air, and a negative pressure is generated inside the suction hose member 10 located on the upstream side of the ejector 20. Due to this negative pressure, earth and sand B is sucked from the suction hose member 10 into the suction hose member 10. Then, the earth and sand B is transported in the transport direction D inside the ejector 20 and the transport pipe 30.

Next, the suction hose member 10 provided on the upstream side of the ejector 20 will be described. The suction hose member 10 is connected to the suction port 20b of the ejector 20 and extends from the suction port 20b. The suction hose member 10 includes a flexible hose 11 at least in a part thereof. For example, the flexible hose 11 extends from the suction port 20b of the ejector 20 by a predetermined length. As an example, the flexible hose 11 has a grip portion 11b gripped by the operator M, and the grip portion 11b is provided on the side of the flexible hose 11 opposite to the suction port 20b. The grip portion 11b may be made rigid so that the operator M can easily hold it.

For example, the suction hose member 10 includes a suction pipe 12 for sucking earth and sand B at an end of the flexible hose 11 opposite to the ejector 20. The suction tube 12 may be a rigid body or a flexible hose. When the suction pipe 12 is a flexible hose, the air suction port 13 described later can be easily formed in the suction pipe 12.

2 (a) and 2 (b) are enlarged cross-sectional views showing the suction pipe 12 of the suction hose member 10. As shown in FIGS. 2A and 2B, the suction hose member 10 (suction pipe 12) is formed on the side surface 12c facing the direction intersecting the end surface 12b located on the opposite side of the ejector 20. It has an air suction port 13 and an earth and sand suction port 14 formed on the end face 12b. The location of the air suction port 13 can be changed as appropriate. For example, the air suction port 13 may be arranged on the downstream side of the grip portion 11b of the flexible hose 11.

The shape of the air suction port 13 is, for example, a circular shape, but may be another shape such as a polygonal shape or an oval shape. For example, assuming that the diameter of the earth and sand suction port 14 is the diameter P (unit: mm), the value of the diameter Q (unit: mm) of the air suction port 13 is (P / 20) or more and (P / 2) or less. As an example, the diameter of the earth and sand suction port 14 is 50 mm (P value is 50), and the diameter of the air suction port 13 is 2.5 mm or more and 25 mm or less (Q value is 2.5 or more and 25 or less). .. When the diameter of the air suction port 13 is 2.5 mm or more, clogging of the air suction port 13 with earth and sand B can be reliably suppressed. Further, since the diameter of the air suction port 13 is 25 mm or less, only the air K can be reliably sucked from the air suction port 13.

The air suction port 13 is formed, for example, at a position adjacent to the end surface 12b of the suction pipe 12, and introduces air K that promotes suction of the earth and sand B from the earth and sand suction port 14 into the suction hose member 10. The suction pipe 12 has, for example, a plurality of air suction ports 13, and the plurality of air suction ports 13 are arranged so as to be arranged along the axial direction E of the suction pipe 12.

For example, the plurality of air suction ports 13 are arranged at equal intervals along the axial direction E, and in this case, the intervals between the air suction ports 13 adjacent to each other are 5 cm or more and 25 cm or less. When the distance between the air suction ports 13 adjacent to each other is 5 cm or more and 25 cm or less, the air K from each of the plurality of air suction ports 13 can more reliably increase the transport capacity of the earth and sand B.

The number of air suction ports 13 is, for example, 5, but may be 1 or more and 4 or less, or 6 or more, and can be appropriately changed. Further, the arrangement mode of the air suction port 13 is not limited to the above-mentioned example, and can be appropriately changed. For example, a plurality of air suction ports 13 may be formed along the circumferential direction of the suction pipe 12, or a plurality of air suction ports 13 may be formed in a staggered manner on the suction pipe 12.

FIG. 2A shows an example in which the projecting member 15 is attached to the air suction port 13. The projecting member 15 is a tubular tube fixed to the suction tube 12 to protect the air suction port 13, and is, for example, a metal member penetrating the air suction port 13. The material of the projecting member 15 may be other than metal.

For example, the protruding member 15 is an elbow tube. The projecting member 15 prevents the air suction port 13 from coming into contact with the ground G to block the air suction port 13 when the air suction port 13 is directed downward, and protects the air suction port 13. It is fixed to the air suction port 13. As shown in FIG. 2B, the protruding member 15 can be omitted.

As shown in FIGS. 2 (a), 2 (b) and 3 (a), the suction hose member 10 is provided with a plurality of air suction ports 13, so that the suction force of the earth and sand B in the suction hose member 10 is obtained. It is possible to increase. FIG. 3A is a graph schematically showing the suction force of the suction hose member 10 having a plurality of air suction ports 13, and FIG. 3B is a graph showing the suction force of the suction hose member having no air suction port 13. It is a graph shown schematically.

The horizontal axis of the graphs of FIGS. 3A and 3B indicates the displacement of the suction hose member 10 (suction pipe 12), and zero on the horizontal axis indicates the position of the downstream end of the suction pipe 12. The displacement L on the horizontal axis indicates the position of the earth and sand suction port 14. As shown in FIG. 3B, it can be seen that in the suction hose member having no air suction port, the suction force of the suction hose member decreases as the distance from the ejector 20 (toward the earth and sand suction port 14) decreases.

On the other hand, as shown in FIG. 3A, in the suction hose member 10 having the air suction port 13, the suction force of the earth and sand B is at the position of the air suction port 13 even at a position away from the ejector 20. Can be seen to be enhanced. That is, the suction force of the earth and sand B is increased at the air suction port 13 by taking in the air K from the air suction port 13. By forming the air suction port 13 between the ejector 20 and the earth and sand suction port 14 of the suction hose member 10 in this way, the suction force of the earth and sand B from the earth and sand suction port 14 can be increased.

FIG. 4A is a diagram schematically showing a state of the earth and sand suction port 14 in the suction hose member 10 having the air suction port 13, and FIG. 4B is a diagram showing the state of the earth and sand suction port 14 in the suction hose member not having the air suction port 13. It is a figure which shows the state of the mouth schematically. As shown in FIG. 4B, in the suction hose member having no air suction port, both the earth and sand B and the air K are sucked from the earth and sand suction port, so that the suction amount of the earth and sand B is halved.

On the other hand, as shown in FIG. 4A, in the suction hose member 10 according to the present embodiment, the air suction port 13 is formed on the side surface 12c separately from the earth and sand suction port 14, so that the earth and sand suction port 13 is formed. It is possible to suck only the earth and sand B from 14. Therefore, the suction amount of earth and sand B can be increased.

Next, the transport pipe 30 and the earth and sand accommodating member 40 provided on the downstream side of the ejector 20 will be described. As shown in FIG. 1, the ejector 20 has a discharge port 20c for discharging the sucked earth and sand B, and the transport pipe 30 is connected to the discharge port 20c and extends from the discharge port 20c. As an example, the transport pipe 30 is a flexible hose, but at least a part of the transport pipe 30 (for example, the downstream end of the transport pipe 30) may include a rigid body.

FIG. 5 is an enlarged perspective view of the downstream end of the transport pipe 30 and the earth and sand accommodating member 40. The earth and sand accommodating member 40 is provided at the downstream end of the transport pipe 30 in the sediment B transport path. The earth and sand accommodating member 40 includes an exhaust port 41 for discharging the air K inside the earth and sand accommodating member 40. For example, a tubular member 42 whose side surface is a filter 42b is inserted into the exhaust port 41, and the air K inside the earth and sand accommodating member 40 is discharged to the outside of the earth and sand accommodating member 40 via the filter 42b. The tubular member 42 can be omitted.

For example, the earth and sand accommodating member 40 includes the above-mentioned tubular member 42 and the bag member 45 on which the above-mentioned exhaust port 41 is formed. As shown in FIGS. 5 and 6, the tubular member 42 has, for example, a cylindrical shape, and the diameter of the tubular member 42 is smaller than the diameter of the exhaust port 41. The tubular member 42 has a first filter 42b formed on the lower side surface and a second filter 42c arranged at one end (upper end) of the tubular member 42 in the axial direction.

A weight 42d is provided at the other end (lower end) of the tubular member 42 in the axial direction, and the weight 42d enables the tubular member 42 to stand on its own in a vertically extending vertical direction. The portion of the tubular member 42 having the filter 42b is inserted into the bag member 45 from the exhaust port 41. The filter 42b introduces the air K into the tubular member 42 without introducing the earth and sand B into the tubular member 42. Further, the filter 42c located at the upper end of the tubular member 42 is provided to prevent the earth and sand contained in the tubular member 42 from scattering to the outside from the upper end of the tubular member 42.

The bag member 45 is, for example, a flexible container bag (also referred to as a flexible container bag or a flexible container). In this case, a general-purpose bag member 45 of the earth and sand accommodating member 40 for accommodating the earth and sand B can be used. Further, when the bag member 45 is a flexible container bag, it is possible to pack a large amount of earth and sand B into one bag member 45.

In addition to the exhaust port 41, the bag member 45 has an opening 43 into which the transport pipe 30 is inserted. The transport pipe 30 may be fixed to the bag member 45 by a band member (for example, a hose band) while being inserted into the opening 43, for example. The earth and sand B transported inside the transport pipe 30 is housed inside the bag member 45 and is accumulated inside the bag member 45 without passing through the filter 42b of the tubular member 42. As described above, the filter 42b provided on the side surface of the tubular member 42 and the filter 42c formed on the upper surface of the tubular member 42 suppress the diffusion of earth and sand B.

The air K that passes through the inside of the transport pipe 30 together with the earth and sand B enters the inside of the bag member 45, passes through the inside of the tubular member 42 from the filter 42b, and is discharged from the filter 42c to the outside of the earth and sand storage member 40. As a result, the air K sucked from the air suction port 13 of the suction hose member 10 is discharged to the outside of the earth and sand accommodating member 40 through the ejector 20 and the transport pipe 30 and through the filters 42b and 42c of the earth and sand accommodating member 40. Will be done. Therefore, an air flow is formed in the sediment transport system 1 by taking in the air K that promotes the transport of the sediment B from the air suction port 13 and discharging the air K from the exhaust port 41 and the filter 42c of the sediment accommodating member 40. Is possible. By this air flow, the earth and sand B can be efficiently conveyed inside the earth and sand transfer system 1.

Next, the earth and sand transport method according to this embodiment will be described. First, as shown in FIG. 1, a suction hose member 10, an ejector 20, a transport pipe 30, and an earth and sand accommodating member 40 are prepared, and the suction hose member 10, the ejector 20, the transport pipe 30, and the earth and sand accommodating member 40 are connected to each other. Then, the earth and sand transport system 1 is installed (installation process).

As a specific example, one end of the flexible hose 11 is connected to the suction port 20b of the ejector 20, and the suction pipe 12 is connected to the other end of the flexible hose 11. Then, the compressor 21 is connected to the ejector 20 via the hose 22, one end of the transport pipe 30 is connected to the discharge port 20c of the ejector 20, and the other end of the transport pipe 30 is inserted into the opening 43 of the earth and sand accommodating member 40. And fix it. A tubular member 42 is inserted into the exhaust port 41 of the earth and sand accommodating member 40 with the filter 42b and the weight 42d facing downward, and the tubular member 42 is made to stand on its own inside the bag member 45.

As described above, after the earth and sand transport system 1 is installed, the compressed air from the compressor 21 to the ejector 20 in a state where the earth and sand suction port 14 of the suction pipe 12 of the suction hose member 10 is in contact with the earth and sand B accumulated on the ground G. The ejector 20 is operated by sending the hose. When the ejector 20 is operated, earth and sand B is sucked into the suction hose member 10 from the earth and sand suction port 14, and air K is sucked into the suction hose member 10 from the air suction port 13 (step of sucking earth and sand).

When the suction hose member 10 sucks the earth and sand B and the air K, the earth and sand B is conveyed together with the air K through the inside of the suction hose member 10, the ejector 20 and the transport pipe 30, and the inside of the transport pipe 30 is conveyed. The passed earth and sand B is stored in the earth and sand storage member 40 (step of transporting the earth and sand). The earth and sand B conveyed to the earth and sand accommodating member 40 is accumulated inside the bag member 45, and the air K moved together with the earth and sand B is discharged to the outside through the exhaust port 41, the filter 42b and the filter 42c of the tubular member 42. .. Then, after the earth and sand B is full inside the bag member 45, for example, the full bag member 45 is replaced with another bag member 45, and the earth and sand B is sucked and conveyed again. A series of steps is completed after sucking and transporting the earth and sand B.

Next, the action and effect obtained from the earth and sand transfer system 1 and the earth and sand transfer method according to the present embodiment will be described in detail. The earth and sand transfer system 1 and the earth and sand transfer method according to the present embodiment include a suction hose member 10 that extends from the suction port 20b of the ejector 20 and includes a flexible hose 11 at least in a part thereof. Since the suction hose member 10 extending from the suction port 20b of the ejector 20 includes the flexible hose 11, the suction hose member 10 can be flexibly moved, so that the handleability can be improved. Since the suction hose member 10 can be flexibly moved, the earth and sand B can be sucked from the suction hose member 10 without moving the earth and sand B to the suction port 20b of the ejector 20, so that the handleability is improved and the earth and sand are improved. B can be sucked efficiently.

Further, as shown in FIGS. 1 and 2, the suction hose member 10 has an earth and sand suction port 14 for sucking earth and sand B on the end surface 12b on the opposite side of the ejector 20, and faces the direction intersecting the end surface 12b. The side surface 12c has an air suction port 13. By sucking the earth and sand B from the earth and sand suction port 14 and sucking the air K from the air suction port 13, the flow of the air K inside the suction hose member 10 can be smoothed, so that the suction force of the earth and sand B can be increased. It is possible to efficiently transport the earth and sand B by raising it.

Further, the earth and sand transport system 1 includes a transport pipe 30 extending from the downstream end (exhaust port 20c) of the ejector 20 and a sediment accommodating member provided at the downstream end of the transport pipe 30 in the sediment B transport path. 40, and the earth and sand accommodating member 40 has an exhaust port 41 for discharging the air K inside the earth and sand accommodating member 40.

Therefore, the earth and sand B sucked by the suction hose member 10 and the ejector 20 is accommodated in the earth and sand accommodating member 40 through the transport pipe 30. Further, the air K sucked from the air suction port 13 of the suction hose member 10 flows into the earth and sand accommodating member 40 together with the earth and sand B through the ejector 20 and the transport pipe 30. Therefore, since the air K can be conveyed together with the earth and sand B inside the suction hose member 10, the ejector 20, and the transfer pipe 30, the earth and sand B can be efficiently conveyed by the air flow. Further, the air K that has flowed into the earth and sand accommodating member 40 is discharged to the outside of the earth and sand accommodating member 40 from the exhaust port 41. Therefore, since the flow of air K inside the suction hose member 10, the ejector 20 and the transport pipe 30 can be made smoother, the sediment B can be transported more efficiently.

Further, the suction hose member 10 is attached to the air suction port 13, and may include a protruding member 15 projecting from the air suction port 13 in a state of being attached to the air suction port 13. In this case, by providing the projecting member 15 protruding from the air suction port 13, it is possible to prevent the air suction port 13 from being blocked even when the air suction port 13 is directed downward and comes into contact with the ground G. Therefore, clogging of the air suction port 13 can be more reliably suppressed.

(Second Embodiment)
Next, the earth and sand transport system according to the second embodiment will be described with reference to FIG. 7. As shown in FIG. 7, the earth and sand transport system according to the second embodiment includes a suction hose member 51 different from the suction hose member 10 described above, and the suction hose member 51 is attached to the side opposite to the ejector 20. It has a widening suction unit 52 that is

In the present disclosure, the "widening suction portion" refers to a portion that sucks earth and sand and has a shape that widens when viewed from one direction. For example, a portion that is expanded in a cone shape. (As an example, a hopper 53 described later) and a portion expanded only in a certain width direction (as an example, a widening suction unit 62 described later) are included. Since the earth and sand transfer system described in the second and subsequent embodiments has a configuration that overlaps with a part of the earth and sand transfer system 1 described above, the description of the part that overlaps with the earth and sand transfer system 1 will be omitted as appropriate.

The suction hose member 51 includes the above-mentioned flexible hose 11 and a hopper 53 attached to the opposite side of the flexible hose 11 from the ejector 20, and the hopper 53 sucks earth and sand into which earth and sand B is charged. It has a mouth 54. The earth and sand suction port 54 widens as it is separated from the connection portion C with the flexible hose 11, and is directed vertically upward so that, for example, the earth and sand B can be easily put in.

For example, a through hole 53c is formed in the bottom surface 53b of the hopper 53, and one end of the flexible hose 11 (the end in which the earth and sand suction port 14 is formed) is inserted into the through hole 53c and fixed. ing. The flexible hose 11 has an air suction port 13 for introducing air K into the inside of the flexible hose 11, as in the first embodiment.

As described above, in the earth and sand transport system according to the second embodiment, the suction hose member 51 includes a widening suction portion 52 which is attached to the opposite side of the ejector 20 and has an earth and sand suction port 54 formed. Therefore, since the portion where the earth and sand suction port 54 is formed is widened, the earth and sand B can be taken in more efficiently. Therefore, the suction and transportation of the earth and sand B can be performed more efficiently.

Further, the widening suction unit 52 is a hopper 53 into which earth and sand B is charged. Therefore, since the earth and sand B can be put into the hopper 53 to suck and convey the earth and sand B, the earth and sand B can be efficiently conveyed.

The hopper 53 may include a stirring member (agitator) for stirring the earth and sand B of the hopper 53. The stirring member includes, for example, a rotating shaft portion extending upward from the bottom surface 53b of the hopper 53, and a plurality of blade portions (or rod-shaped portions) for stirring the earth and sand B as the rotating shaft portion rotates. In this case, since the earth and sand B inside the hopper 53 can be agitated by the stirring member, clogging of the earth and sand B in the transport path can be more reliably suppressed and the earth and sand B can be transported more efficiently.

Further, a modifier for reducing the viscosity of the earth and sand B may be put into the hopper 53 together with the earth and sand B. The modifier may be, for example, a soil modifier containing zeolite or magnesium oxide, or may contain lime, cement or gypsum. By charging the modifier together with the earth and sand B into the hopper 53, it is possible to suppress the mud formation of the earth and sand B charged into the hopper 53, which contributes to further improvement of the transportability of the earth and sand B.

A screen 55 may be provided on the upper surface of the hopper 53, and stones and gravel larger than the thickness of the earth and sand B transport path (suction hose member 51, ejector 20, transport pipe 30, etc.) may be provided inside the hopper 53 by the screen 55. It may be prevented from being taken in. Further, the vibrator 56 (vibrator) may be attached to the outer surface of the hopper 53, and the earth and sand B adhering to the hopper 53 may be removed by the vibration of the vibrator 56. Further, the number of the vibrators 56 may be one or a plurality.

(Third Embodiment)
Subsequently, the suction hose member 60 of the earth and sand transport system according to the third embodiment will be described with reference to FIGS. 8 and 9. As shown in FIGS. 8 and 9, the suction hose member 60 includes, for example, a suction pipe 61 provided on the suction port 20b side of the ejector 20 and a widening suction portion 62 connected to the suction pipe 61. The suction pipe 61 does not have, for example, the air suction port 13 described above. The suction tube 61 may be a rigid body or a flexible hose.

The widening suction portion 62 is connected to, for example, an end portion of the suction pipe 61 opposite to the ejector 20 via a connecting member 63. As an example, the connecting member 63 is a band member such as a hose band. The widening suction portion 62 has a tubular portion 62b located on the root side (connecting member 63 side) and a wide portion 62c located on the tip end side (opposite side to the connecting member 63). An inclined portion 62d that transitions from the tubular portion 62b to the wide portion 62c is formed between the tubular portion 62b and the wide portion 62c, for example. Due to the inclined portion 62d, the widening suction portion 62 gently transitions from the tubular portion 62b to the wide portion 62c.

For example, an air suction port 64 and an earth and sand suction port 65 are formed in the wide portion 62c of the widening suction portion 62. As an example, the wide portion 62c has an end surface 62f forming the tip end portion of the widening suction portion 62 and an upper surface 62g facing one direction H1 intersecting the end surface 62f, and the end surface 62f is from the tip end 62h of the widening suction portion 62. It extends diagonally with respect to H1 in one direction toward the upper surface 62 g. Since the end face 62f extends diagonally in this way, the widening suction portion 62 can be easily inserted into the earth and sand B.

The widening suction portion 62 has, for example, an air suction port 64 formed on the upper surface 62g and an earth and sand suction port 65 formed on the end surface 62f. Since the earth and sand suction port 65 is formed on the diagonally extending end surface 62f, a large area of the earth and sand suction port 65 can be secured, so that the earth and sand B can be more efficiently sucked from the earth and sand suction port 65. it can.

The widening suction portion 62 has, for example, a plurality of air suction ports 64 arranged so as to be arranged along the width direction (horizontal direction in FIG. 8) of the wide portion 62c, and the air suction port 64 is protected on the upper surface 62g. A protective member 66 may be provided. As an example, the protective member 66 has a first wall portion 66c protruding from the earth and sand suction port 65 side of the air suction port 64, and a second wall portion 66b extending from the first wall portion 66c to the opposite side of the earth and sand suction port 65. Be prepared. By protecting the air suction port 64 by the protective member 66, clogging of the earth and sand B at the air suction port 64 can be suppressed.

When the widening suction portion 62 is viewed from the one-way H1, the wide portion 62c becomes wider as the distance from the tubular portion 62b increases. When the widening suction portion 62 is viewed from one direction H1, for example, the wide portion 62c has a trapezoidal shape extending from the tubular portion 62b. Further, the length N1 (thickness) of the wide portion 62c in the unidirectional H1 is shorter (thinner) than the length N2 (thickness) of the tubular portion 62b in the unidirectional H1.

For example, the length N1 of the wide portion 62c in the unidirectional H1 may be 80% or less of the length N2 of the tubular portion 62b in the unidirectional H1. In this case, it is possible to reduce the possibility that the earth and sand B is caught and clogged in the widening suction portion 62. Then, the air K and the earth and sand B can be sucked into the wide portion 62c more efficiently.

In the above example, the widening suction portion 62 including the wide portion 62c whose shape when viewed from one direction H1 is trapezoidal has been described. However, as shown in FIG. 10, the widening suction portion 67 may have a wide portion 67c whose shape when viewed from one direction H1 is rectangular. Further, instead of the tubular portion 62b, a tubular portion 69 formed with a screwed portion 68 (male screw portion) to be inserted into the suction pipe 61 may be provided. As described above, the shape of the widening suction portion can be changed as appropriate. In the case of the widening suction portion 67 having the tubular portion 69 on which the screwed portion 68 is formed, the connecting member 63 can be omitted.

As described above, in the suction hose member 60 of the earth and sand transport system according to the third embodiment, the widening suction portions 62 and 67 are the tubular portions 62b and 69 located on the suction port 20b side of the ejector 20 and the tubular portions 62b and 69. It has wide portions 62c and 67c that are thinner than the diameter (length N1) of the hose and widen as the distance from the tubular portions 62b and 69 increases. Therefore, since the flow of the earth and sand B and the air K in the widening suction portions 62 and 67 can be made smoother, the possibility of the earth and sand B being clogged can be further reduced.

(Fourth Embodiment)
Subsequently, the earth and sand transport system according to the fourth embodiment will be described with reference to FIGS. 11 and 12. The earth and sand transport system according to the fourth embodiment is different from the first embodiment in that it includes an earth and sand accommodating member 70 different from the earth and sand accommodating member 40. The earth and sand accommodating member 70 includes a lid member 72 formed with an exhaust port 71 for discharging air K inside the earth and sand accommodating member 70, a container 73 covered with the lid member 72, and a bag member 75 housed in the container 73. To be equipped with.

For example, a mesh-shaped filter 71b is attached to the exhaust port 71, whereby the scattering of the earth and sand B to the outside of the earth and sand accommodating member 70 is suppressed. Further, the lid member 72 has an opening 72b into which the transport pipe 30 is inserted. The transport pipe 30 is fixed to the lid member 72 in a state of being inserted into the opening 72b.

The container 73 has, for example, a bottomed tubular shape. The bag member 75 is, for example, hooked on the upper end edge 73b of the container 73 and held in the container 73. The bag member 75 is a bag body that houses the earth and sand B transported inside the transport pipe 30. As the bag member 75, various bag bodies can be used, and as an example, a flexible container bag is used. Although the details of the earth and sand accommodating member 70 have been described above, the configuration of the earth and sand accommodating member 70 is not limited to the above example and can be changed as appropriate.

In the earth and sand transport system according to the fourth embodiment, the earth and sand storage member 70 includes a bag member 75 in which the earth and sand B is stored, and a container 73 in which the bag member 75 is housed. Therefore, by accommodating the earth and sand B in the bag member 75, more earth and sand B can be accommodated in the earth and sand accommodating member 70. Further, since the container 73 accommodates the bag member 75, the bag member 75 accommodating the earth and sand B can be stabilized by the container 73, so that the conveyed earth and sand B can be stored in a stable state.

Further, the earth and sand accommodating member 70 further includes a lid member 72 that covers the container 73, and an exhaust port 71 is formed in the lid member 72. Therefore, by covering the container 73 in which the bag member 75 is housed with the lid member 72 in which the exhaust port 71 is formed, the earth and sand storage member 70 provided with the bag member 75 can be efficiently installed.

(Fifth Embodiment)
Next, the earth and sand transport system according to the fifth embodiment will be described with reference to FIGS. 13 (a) and 13 (b). As shown in FIGS. 13 (a) and 13 (b), the earth and sand transport system according to the fifth embodiment includes the earth and sand accommodating member 80 having a lid member 82 different from the lid member 72, and earth and sand It is different from the fourth embodiment in that the accommodating member 80 has a screw-in pipe joint 81 at the downstream end of the transport pipe 30.

The lid member 82 seals the inflow portion 82b into which the earth and sand B conveyed inside the transport pipe 30 flows in, the fixing portion 82c to which the downstream end of the transport pipe 30 is fixed, the bag member 75, and the container 73. A sealing portion 82d for stopping is provided. A screw-in pipe joint 81 is connected to the downstream end of the transport pipe 30, and the screw-in pipe joint 81 has a male screw portion 81b screwed into the fixed portion 82c.

The fixing portion 82c is a portion that receives the screw-in pipe joint 81, and has a female screw portion 82f into which the male screw portion 81b of the screw-in pipe joint 81 is screwed. The screwed pipe joint 81 and the transport pipe 30 are fixed to the lid member 82 by screwing the male screwed portion 81b of the screwed pipe joint 81 into the female screw portion 82f of the fixed portion 82c.

The inflow portion 82b includes an impact mitigation portion 82g that collides with the inflowing earth and sand B and cushions the impact of the earth and sand B. The impact mitigation portion 82g has, for example, an inclined portion 82h that is inclined with respect to both the transport direction D of the earth and sand B and the falling direction X of the earth and sand B. For example, the inclined portion 82h includes a metal plate 82j and a rubber plate 82k. The earth and sand B that has flowed into the inflow portion 82b along the transport direction D hits the inclined portion 82h of the impact mitigation portion 82g, changes direction from the transport direction D to the fall direction X, and then enters the bag member 75. At this time, since the earth and sand B hits the rubber plate 82k of the inclined portion 82h, the impact of the earth and sand B on the lid member 82 is alleviated by the rubber plate 82k.

As described above, in the earth and sand transport system according to the fifth embodiment, the lid member 82 has an impact mitigation portion 82 g that alleviates the impact of the earth and sand B on the lid member 82. Therefore, since the impact of the earth and sand B conveyed from the transport pipe 30 to the earth and sand accommodating member 80 can be alleviated, the possibility that the bag member 75 is torn by the impact of the earth and sand B and the earth and sand accommodating member 80 is damaged is reduced. Can be made to. Further, since the impact mitigation portion 82g has the rubber plate 82k, the collision noise of the earth and sand B can be suppressed, so that the earth and sand B can be conveyed at night. However, the impact mitigation portion may not have, for example, the rubber plate 82k, and the configuration of the impact mitigation portion can be changed as appropriate.

The embodiments of the sediment transport system and the sediment transport method according to the present disclosure have been described above. However, the present invention is not limited to the above-described embodiments, and may be modified or applied to other objects without changing the gist described in each claim. That is, the shape, size, number, material and arrangement mode of each part of the sediment transport system, and the content and order of each step of the sediment transport method can be appropriately changed without changing the above gist.

For example, in the above-described embodiment, the sediment transport system 1 and the sediment transport method of the sediment B used at the construction site A have been described, but the sediment transport system and the sediment transport method are used at a place other than the construction site. May be good. Further, in the above-described embodiment, the ejector 20 in which the compressor 21 is connected via the hose 22 has been described. However, the configuration of the ejector is not limited to the one to which the compressor 21 and the hose 22 are connected, and can be appropriately changed.

Further, in the above-described embodiment, as shown in FIG. 1, an example in which the transport path of the sediment B includes a suction hose member 10, an ejector 20, a transport pipe 30, and a sediment accommodating member 40 has been described. However, any of the suction hose member, the ejector, the transfer pipe, and the earth and sand accommodating member may be omitted as the transportation path of the earth and sand B. For example, an earth and sand transport system in which the suction hose member is omitted may be used. This earth and sand transport system is a sediment transport system that transports earth and sand, and is an ejector having a suction port for sucking earth and sand, a transport pipe extending from an end on the downstream side of the ejector, and a downstream of the transport pipe in the sediment transport path. A sediment accommodating member provided at a side end thereof is provided, and the earth and sand accommodating member has an exhaust port for discharging air inside the earth and sand accommodating member.

(Example)
Next, examples of the earth and sand transfer system and the earth and sand transfer method according to the present disclosure will be described. The present invention is not limited to the following examples. In the following example, an example in which the ejector 20, the transport pipe 30, and the earth and sand accommodating member 40 shown in FIG. 1 are provided will be described with respect to Examples 1 and Comparative Examples 1 and 2 described later.

(Example 1)
The suction hose member 10 with the air suction port 13 was connected to the suction port 20b of the ejector 20 to convey the earth and sand B which is mountain sand. The inner diameter of the suction hose member 10 was 50 mm, and the transport distance from the ejector 20 to the earth and sand accommodating member 40 was 10 m.

(Comparative Example 1)
A flexible hose having no air suction port was connected to the suction port 20b of the ejector 20 to convey the earth and sand B which is mountain sand. The inner diameter of this flexible hose was 50 mm, and the transport distance from the ejector 20 to the earth and sand accommodating member 40 was 10 m.

(Comparative Example 2)
Sediment B was directly sucked from the suction port 20b of the ejector 20 to transport the earth and sand B which is mountain sand. The transport distance from the ejector 20 to the earth and sand accommodating member 40 was set to 10 m.

As described above, the transport capacity (the amount of sediment B transported per unit time) when the sediment B was transported in each of the sediment transport systems of Example 1, Comparative Example 1 and Comparative Example 2 was measured. The results are shown in Table 1 below. Table 1 below shows the results when the transport capacity of Comparative Example 2 having neither the suction hose member 10 nor the flexible hose is 1.0.

As shown in Table 1, in Comparative Example 1 in which the flexible hose is connected to the suction port 20b of the ejector 20, the range is wider by the flexible hose than in Comparative Example 2 in which the earth and sand B is directly sucked from the suction port 20b. It was found that although the earth and sand B can be sucked, the transport capacity is reduced. On the other hand, in the first embodiment in which the suction hose member 10 with the air suction port 13 is connected to the suction port 20b, a wider range of earth and sand B can be efficiently sucked than in the comparative example 2, and the earth and sand B is more efficient than in the comparative example 1. It was found that the transport capacity could be increased 1.4 times.

Subsequently, an experiment for verifying the effect of the earth and sand accommodating member 40 was performed on the earth and sand transport system according to Examples 2 and 3 described later. In Examples 2 and 3, the earth and sand accommodating member 40 described later was connected to the transport pipe 30 to which the suction hose member 10 and the ejector 20 were connected.

(Example 2)
The earth and sand accommodating member 40 described above does not have the tubular member 42, and the earth and sand B, which is mountain sand, was transported. The inner diameter of the suction hose member 10 was 50 mm, and the transport distance from the ejector 20 to the earth and sand accommodating member 40 was 10 m.

(Example 3)
The above-mentioned earth and sand accommodating member 40 has a tubular member 42, and earth and sand B, which is mountain sand, is transported. The inner diameter of the suction hose member 10 was 50 mm, and the transport distance from the ejector 20 to the earth and sand accommodating member 40 was 10 m.

As described above, the transport capacity (the amount of sediment B transported per unit time) when the sediment B was transported in the sediment transfer systems of Examples 2 and 3 was measured. The results are shown in Table 2 described later. Table 2 shows the results when the transport capacity of the second embodiment without the tubular member 42 is 1.0.

As shown in Table 2, it was found that in Example 3 having the tubular member 42, the transport capacity was 2.9 times higher than in Example 2 without the tubular member 42. From the results of the above transfer experiment, it was found that when the suction hose member 10 is provided, a wide range of earth and sand B can be efficiently sucked and conveyed, and the transfer capacity of the earth and sand B can be enhanced. Further, it was found that when the earth and sand accommodating member 40 includes the tubular member 42, the carrying capacity of the earth and sand B can be further enhanced.

1 ... Sediment transport system, 10, 51, 60 ... Suction hose member, 11 ... Flexible hose, 11b ... Grip part, 12 ... Suction pipe, 12b ... End face, 12c ... Side surface, 13 ... Air suction port, 14 ... Sediment Suction port, 15 ... projecting member, 20 ... ejector, 20b ... suction port, 20c ... discharge port, 21 ... compressor, 22 ... hose, 30 ... transport pipe, 40, 70, 80 ... earth and sand storage member, 41, 71 ... exhaust Mouth, 42 ... Cylindrical member, 42b, 42c ... Filter, 42d ... Weight, 43 ... Opening, 45 ... Bag member, 52 ... Widening suction part, 53 ... Hopper, 53b ... Bottom surface, 53c ... Through hole, 54 ... Sediment suction Mouth, 55 ... screen, 56 ... oscillator, 61 ... suction tube, 62 ... widening suction part, 62b ... tubular part, 62c ... wide part, 62d ... inclined part, 62f ... end face, 62g ... top surface, 62h ... tip, 63 ... Connection member, 64 ... Air suction port, 65 ... Sediment suction port, 66 ... Protective member, 66b ... Second wall part, 66c ... First wall part, 67 ... Widening suction part, 67c ... Wide part, 68 ... Screwed Part, 69 ... Cylindrical part, 71b ... Filter, 72 ... Lid member, 72b ... Opening, 73 ... Container, 73b ... Edge, 75 ... Bag member, 81 ... Screw-in pipe joint, 81b ... Male screw part, 82 ... Lid member , 82b ... Inflow part, 82c ... Fixed part, 82d ... Sealing part, 82f ... Female screw part, 82g ... Impact mitigation part, 82h ... Inclined part, 82j ... Metal plate, 82k ... Rubber plate, A ... Construction site, B ... Sediment, C ... Connection part, D ... Transport direction, E ... Axial direction, G ... Ground, H1 ... One direction, K ... Air, L ... Displacement, M ... Worker, P ... Diameter, Q ... Diameter (Unit:: mm), X ... Falling direction.

Claims (10)

It is a sediment transport system that transports sediment.
An ejector with a suction port that sucks earth and sand,
A suction hose member that is connected to the suction port and extends from the suction port and includes a flexible hose at least in part thereof is provided.
The suction hose member has an earth and sand suction port formed on an end surface located on the opposite side of the ejector, and an air suction port formed on a side surface facing a direction intersecting the end surface.
Sediment transport system. A transport pipe extending from the downstream end of the ejector,
A soil storage member provided at the downstream end of the transport pipe in the soil transport path, and
With
The earth and sand accommodating member has an exhaust port for exhausting air inside the earth and sand accommodating member.
The earth and sand transport system according to claim 1. The suction hose member includes a widening suction portion which is attached to the side opposite to the ejector and in which the earth and sand suction port is formed.
The earth and sand transport system according to claim 1 or 2. The suction hose member is attached to the air suction port, and includes a protruding member that protrudes from the air suction port in a state of being attached to the air suction port.
The earth and sand transport system according to any one of claims 1 to 3. The widening suction portion has a tubular portion provided on the suction port side of the ejector and a wide portion that is thinner than the diameter of the tubular portion and widens as the distance from the tubular portion increases.
The earth and sand transport system according to claim 3. The widening suction portion is a hopper into which earth and sand are put.
The earth and sand transport system according to claim 3. The earth and sand accommodating member has a bag member for accommodating earth and sand and a container for accommodating the bag member.
The earth and sand transport system according to claim 2. The earth and sand accommodating member further includes a lid member that covers the container.
The exhaust port is formed in the lid member.
The earth and sand transport system according to claim 7. The lid member has an impact mitigation portion that cushions the impact of earth and sand on the lid member.
The earth and sand transport system according to claim 8. A method for transporting sediment using the sediment transport system according to any one of claims 1 to 9.
A step of sucking earth and sand from the earth and sand suction port of the suction hose member having the air suction port to the suction hose member, and
It comprises a step of passing the sucked earth and sand through the ejector and transporting the earth and sand.
Sediment transport method.

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