JP2002121764A - Earth transport device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earth transport device which is capable of easily maintaining the pressure in a transport pipe, has excellent sealability and function of pressing earth, and is capable of transporting the earth even when lump earth is mixed. SOLUTION: In this earth transport device 1 in which an earth feed device 4 for transferring earth while maintaining high pressure in a transport pipe 3 is connected to the transport pipe 3 with mud-like earth such as dredged earth thrown in and conveyed with compressed air, the earth feed device 4 comprises a male rotor 6 having a male screw shape, a female rotor 7 having a female screw shape to be engaged with the male rotor 6, and a casing 10 which surround these rotors and has an earth introduction part 8 on one end and an earth discharge port 9 connected to the transport pipe 3 on the other end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sediment transporting apparatus for transporting muddy soil such as dredged soil.

[0002]

2. Description of the Related Art As shown in FIG. 12, as a sediment transporting device 65 for transporting muddy soil d such as dredged soil, a hopper 60 for charging the sediment d, and pressure feeding of the soil d by compressed air. Pipe 61, hopper 60 and transport pipe 61
And a rotary feeder 62 provided between the hopper 60 and the hopper 60 for quantitatively supplying the earth and sand d in the transport pipe 61.

The earth and sand transport device 65 takes in earth and sand d dropped from a hopper 60 into an earth and sand chamber 64 defined by a rotary rotor 63 in a rotary feeder 62, and rotates the rotary rotor 63 to rotate the rotary feeder 62.
Is dropped into the transport pipe 61 connected to the lower end of the transport pipe 61.

As shown in FIG. 13, a pressure pump 67 is connected to a downstream side of a screw conveyor 66 for taking in piled earth and sand d, and a pipe 68 is connected to a discharge side of the pressure pump 67. There is also a sediment transport device 69 consisting of:

[0005] The earth and sand transport device 69 directly feeds the muddy earth and sand d taken in by the screw conveyor 66 to the pressure pump 6.
7 to be fed under pressure.

[0006]

In the earth and sand transportation device 65 shown in FIG. 12, after the earth and sand fall from the earth and sand room 64 partitioned by the rotating rotor 63, the transportation pipe is inserted into the earth and sand room 64. Because the compressed air in 61 is filled and returned, the compressed air escapes outside the transport pipe 61,
There is a problem that it is difficult to maintain the pressure in the transport pipe 61. In addition, there was a problem that the water blocking property was poor and the function of pushing in the earth and sand like a pump was weak.

[0007] Further, in the earth and sand transporting device 69 shown in FIG. 13, it is not possible to transport the soil unless the soil d is close to a fluid state, and it is not possible to transport the dredged soil in which the massive earth and sand are mixed. was there.

Therefore, an object of the present invention is to solve the above-mentioned problems, to easily maintain the pressure in a transport pipe, to have excellent water stopping properties,
It is an object of the present invention to provide an earth and sand transporting device having a function of pushing in earth and sand, and capable of transporting even if massive earth and sand are mixed.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a transport pipe for feeding muddy soil such as dredged soil and the like with a compressed air, and a high pressure pipe in the transport pipe. In the earth and sand transporting device connected to the earth and sand supply device for transferring earth and sand while holding, the earth and sand supply device, a male rotor having a male screw shape, and a female rotor having a female screw shape that meshes with the male rotor And a casing surrounding these rotors and having a sediment introduction portion at one end and a sediment discharge port connected to the transport pipe at the other end.

The earth and sand introduced from the earth and sand introduction section is introduced into a space defined by the spiral blades of the male rotor, the casing, and the female rotor, and the space is formed by rotating the male and female rotors. Is moved axially toward the sediment discharge port. The earth and sand in the space moves with the movement of the space and is pushed out of the earth and sand discharge port into the transport pipe. Since the above space is sealed and does not return to the sediment introduction section,
The compressed air in the transport pipe does not escape to the outside of the transport pipe, water can be sufficiently stopped, and the soil can be supplied to the transport pipe while being pushed.

Further, it is preferable that gears meshing with each other be provided on the shafts of the male rotor and the female rotor to drive the two rotors to rotate. The load on the spiral blades of the male rotor and the spiral grooves of the female rotor can be reduced, and it is possible to prevent an eccentric load from acting on the rotor and prevent abnormal deformation of the rotor.

Preferably, at least one of the gears is crimped and fixed to the shaft of the rotor so that the gear runs idle when an excessive load is applied to the rotor. When the torque is over, the gears can be idled, and breakage such as thread breakage of the rotor can be prevented.

Further, the shafts of the male rotor and the female rotor are rotatably supported by a bearing provided on the casing through an annular seal, and grease is provided between the shaft and the seal member of the annular seal by the annular seal. Grease collection for forming a grease supply path for supplying the grease, collecting grease located on the shaft end side with respect to the grease supply path, and discharging the collected grease outside the casing to check for seal leakage.・ It is recommended to form a sediment inspection passage.

By checking the grease collection / sediment leakage from the grease collection / sediment inspection passage, it is possible to easily find a defect in the seal.

The male rotor shaft and the female rotor shaft may be provided with exchangeable collars for contacting the annular seal. Maintenance of the shaft of the rotor can be easily performed.

The casing may be formed so that it can be divided. The rotor can be easily exposed, and maintenance can be facilitated.

Preferably, the spiral blades of the male rotor are formed of a wear-resistant metal material, and the female rotor is formed of a metal material softer than the spiral blades.

By making the female rotor that is easy to repair after wear preferentially worn over the spiral blade, wear of the spiral blade that is difficult to repair can be prevented, and maintenance can be facilitated.

It is preferable that a wear-resistant liner such as a steel plate is replaceably provided on the inner surface of the casing.

The maintenance of the casing can be facilitated.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, a soil transport device 1 is provided facing the sea and receives a hopper 2 for receiving muddy sediment (dredge soil) supplied from a dredger (not shown).
A transport pipe 3 piped below the hopper 2 for pressure-feeding the earth and sand by compressed air; and a transport pipe 3 provided between the hopper 2 and the transport pipe 3 to remove the earth and sand in the hopper 2 while maintaining the high pressure in the transport pipe 3. And an earth and sand supply device 4 for supplying into the transport pipe 3.

The transport pipe 3 has one end located below the hopper 2 and extends to a predetermined transport destination. An air pipe 5 for supplying compressed air into the transport pipe 3 is connected to one end of the transport pipe 3, and feeds the earth and sand supplied into the transport pipe 3 from one end side to a transport destination. It has become.

As shown in FIGS. 2 and 3, the earth and sand supply device 4 includes a male rotor 6 having a male screw shape, a female rotor 7 having a female screw shape meshing with the male rotor 6, and these rotors 6. , 7 and a casing 10 having a sediment introduction port 8 at one end and a sediment discharge port 9 connected to the transport pipe 3 at the other end.

As shown in FIG. 10, the male rotor 6 includes a male shaft 11 having both ends supported by the casing 10 and a male screw 12 formed at the center of the male shaft 11.
The male screw portion 12 is formed by integrally providing a spiral blade 14 with a male roller portion 13 having a larger diameter than the male shaft portion 11 and a uniform diameter in the axial direction.

As shown in FIG. 11, the spiral blade 14 is formed so that the radially distal end side is thinner than the proximal end side, so that it can be smoothly engaged in a spiral groove 18 described later. As shown in FIG. 8, the female rotor 7 includes a female shaft 15 whose both ends are supported by the casing 10, and a female screw 16 formed at the center of the female shaft 15.

The female screw portion 16 is formed by forming a spiral groove 18 in a female roller portion 17 having a larger diameter than the female shaft portion 15 and a uniform diameter in the axial direction. Female side roller part 17
Is formed to have substantially the same diameter as the male roller portion 13.

As shown in FIG. 9, the spiral groove 18 is formed with a narrow entrance at the groove and a wide width at the back, so that the clearance with the spiral blade 14 is kept constant at the entrance of the groove. ing.

As shown in FIGS. 2 and 3, the female rotor 7 is disposed above and parallel to the male rotor 6, and meshes with the spiral blade 14 and the spiral groove 18 to form the roller portions 13, 1.
7 are brought into close contact with each other.

A plurality of hydraulic motors 21 are connected to the male shaft 11 of the male rotor 6 via a coupling 19 and a first gear 20.
Are connected. Shaft 1 of male rotor 6 and female rotor 7
The first gear 15 and the second gear 15 are provided with a second gear 22 and a third gear 23 that mesh with each other.

When the male rotor 6 is rotationally driven by the hydraulic motor 21, the rotational driving force is transmitted to the female rotor 7 through the second gear 22 and the third gear 23, and the spiral blade 14 and the female roller portion The rotors 6 and 7 are driven to rotate without imposing a load on the rotor 17.

As shown in FIG. 4, the second gear 22 and the third gear 23 are attached to the shaft portions 11 and 15 of the rotors 6 and 7, respectively.
4 is fixed.

The mounting member 24 comprises the gears 22 and 23 and the shaft 1
1 and 15, the gears 22, 23 are pressed radially outward, and the shafts 11, 15 are pressed radially inward.
This is for fixing the gears 22 and 23 to the shaft portions 11 and 15 of the rotors 6 and 7 by pressure bonding. And the mounting member 2
Numeral 4 causes the gears 22, 23 to idle when an excessive load is applied to the rotors 6, 7.

As shown in FIG. 4 and FIG.
The inner race 25 is formed in the shape of a ring plate in contact with the shaft portions 11 and 15, the outer race 26 is formed in the shape of a ring plate in contact with the gears 22 and 23, and the inner race 25 and the outer race 26 are formed. And a plurality of bolts 29 for connecting these rings 27 and 28 so as to be close to and away from each other in the axial direction.

A taper 30 is formed on the outer peripheral side of the inner race 25 so as to increase in thickness from both ends toward the center, and on the inner peripheral side of the outer race 26 as it goes from both ends to the center. A taper 31 for increasing the thickness is formed. Then, tighten the bolt 29 to remove the ring 2
The inner race 25
The outer race 26 is pressed against the gears 22 and 23 while pressing the shafts 11 and 15 on the shafts 11 and 15 so that the shafts 11 and 15 and the gears 22 and 2 are pressed.
3 is fixed by crimping.

The spiral blade 14 is formed of a wear-resistant steel material to which a plurality of metals such as chromium and molybdenum are added, and the female screw portion 16 is formed of a steel material containing few additives and softer than the spiral blade 14.

Generally, a hard steel material containing many additives is difficult to weld, and a soft steel material containing few additives is easy to weld. For this reason, a soft steel material is used for the female screw portion 16 that is easy to repair after abrasion, and the repair of the female rotor 7 is made easier while preventing the spiral blade 14 from being worn by contact with the female screw portion 16. .

As shown in FIG. 6, the casing 10 is formed so as to be dividable, and a base portion 32 forming a lower portion of the casing 10 and male and female members provided at both ends in the axial direction of the base portion 32 respectively. An end face portion 33, 34 for supporting the rotor 6 and the female rotor 7, a sediment introduction portion 8 detachably provided on the sediment introduction side of the base portion 32 and having a sediment introduction port 35 for introducing sediment from above, and a base portion 32. And a discharge side hood portion 36 which is detachably provided on the earth and sand discharge side of the base portion 32 and covers the upper side of the earth and sand discharge side of the base portion 32, and which covers the outer periphery of the female screw portion 16 of the female rotor 7 and is provided at the center of the base portion 32, and Central hood portion 37 that covers the outer periphery of the male screw portion 12
Consists of

The base portion 32 is fixed at a predetermined position facing the sea, and has a sediment discharge port 9 penetrating vertically on the discharge side.

The end surfaces 33 and 34 are formed so that they can be divided into upper and lower parts, respectively.
At 39, both ends of the male rotor 6 are supported, and the upper
0 and 41 support both ends of the female rotor 7. The upper end portions 40 and 41 are respectively connected to the lower end portion 3
It can be removed axially outward or upward from 8,39.

By removing the upper end portions 40, 41 from the lower end portions 38, 39, only the female rotor 7 can be removed from the casing 10 while the male rotor 6 is supported, and the male rotor 6 can be removed. 6 and female rotor 7
Can be handled separately.

As shown in FIGS. 4 and 6, lower end surfaces 38 and 39 and upper end surfaces 40 and 41 are used to rotatably support shaft portions 11 and 15 of rotors 6 and 7, respectively. Bearing portions 42 and 43 are provided.
The ring 43 is provided with annular seals 44 and 45 for sealing the shafts 11 and 15 of the rotors 6 and 7 so that earth and sand do not enter the bearings 42 and 43.

The bearings 42 and 43 are provided with spherical roller bearings 4.
6 and a thrust self-aligning roller bearing 47.

The annular seals 44, 45 are formed in an annular shape so that the shaft portions 11, 15 of the rotors 6, 7 can be inserted therethrough. A packing 48 is provided on the inner circumference of the annular seals 44 and 45.
And a plurality of seal members 49, 50, 51 are formed.

The packing 48 is arranged near the center of the shaft portions 11 and 15 closest to the earth and sand flow path.
5 to make an annular contact with the outer periphery of the seal 5 so as to seal in a liquid-tight manner.

The seal members 49, 50 and 51 are formed of an annular oil seal having a V-shaped cross section, and are disposed at a predetermined distance from the packing 48 in the axial end direction.
An oil seal 49 and a second oil seal 5 arranged at a predetermined distance from the first oil seal 49 in the axial end direction.
0 and a third oil seal 51 arranged at a predetermined distance from the second oil seal 50 in the axial direction.

The annular seals 44 and 45 have the shaft 1
A grease supply path 52 for supplying grease between the first and the 15th and the seal members 49, 50 and 51;
A grease collecting / sediment inspection passage 53 is located on the shaft end side for collecting grease, discharging the collected grease out of the casing 10, and checking for seal leakage.

More specifically, the grease supply passage 52 is formed by forming holes for allowing grease to pass through the lower end face portions 38 and 39 and the annular seals 44 and 45, and includes a first oil seal 49 and a second oil seal 49. The downstream end is opened between the oil seals 50.

The grease collection / sediment inspection passage 53 has one end opened in a ring-shaped oil chamber 54 formed between the second oil seal 50 and the third oil seal 51, and has annular end faces 44, 45 and lower end faces. Holes for passing a liquid such as grease are formed in the portions 38 and 39, and the other ends are open to the atmospheric pressure.

Normally, grease is leaked from the grease collection / sediment inspection passage 53. If the grease is leaked from the grease collection / sediment inspection passage 53, the packing 48 and the sealing members 49, 50, 51 may be abnormal. Can be detected.

The shaft portion 1 of the male rotor 6 and the female rotor 7
A collar 55 made of a steel plate that comes into contact with the annular seals 44 and 45 is provided in each of the first and the 15th so as to be replaceable. When the contact surface with the annular seals 44 and 45 is worn, the collar 55 is easily replaced. The shaft portions 11 and 15 can be repaired.

As shown in FIGS. 3 and 7, the central hood portion 37 is formed so as to be divided into two in the left-right direction (the direction perpendicular to the axis), and the male screw portion 12 and the female screw portion 16 are divided.
A liner 56 made of wear-resistant steel
Are provided so as to be exchangeable. This facilitates repair when the central hood portion 37 is worn by earth and sand.

Next, the operation will be described.

When the soil transport device 1 is started, muddy soil is put into the hopper 2, the hydraulic motor 21 of the soil and sand supply device 4 is driven to rotate, and compressed air is introduced into the transport pipe 3 through the air pipe 5. Supply. The hydraulic motor 21 is started by sequentially increasing the oil amount of a hydraulic pump (not shown) in order to reduce the impact.

The rotational driving force of the hydraulic motor 21 is transmitted to the male shaft 11 of the male rotor 6 via the first gear 20 and the coupling 19, and is transmitted to the female rotor 11 via the second gear 22 and the third gear 23. 7 is transmitted to the female shaft 15. Male rotor 6
The female rotor 7 is rotated at the same peripheral speed while meshing the male screw part 12 and the female screw part 16.

When the earth and sand is put into the hopper 2, the earth and sand falls by its own weight and reaches the earth and sand inlet 35 of the earth and sand supply device 4. Since the flow path to the sediment inlet 35 is formed substantially vertically and the frontage is also widened, the sediment smoothly reaches the sediment inlet 35 and enters the sediment supply device 4 through the sediment inlet 35. .

The earth and sand also penetrate into the gap between the spiral blades 14 from the tip side of the spiral blades 14 of the male rotor 6. The gap between the spiral blades 14 into which the earth and sand has entered is closed by rotating the male rotor 6 and inserting the tip of the spiral blade 14 into the spiral groove 18 of the female rotor 7. That is, the spiral space between the spiral blades 14 is closed and sealed by the female screw portion 16 of the female rotor 7.

As shown in FIG. 2, this closed space 5
The male rotor 6 and the female rotor 7 rotate while meshing with each other, so that the rotor 7 is moved to the discharge side in the axial direction, and the earth and sand sealed in the space 57 is also moved. At the same time, the space 5 on the side of the earth and sand introduction port 35 adjacent to the spiral blade 14 is interposed.
7, the next earth and sand is sealed and moved, and the earth and sand on the earth and sand introduction side is successively sealed and moved one after another.

The earth and sand in the closed space 57 is pushed by the spiral blade 14 and moves in the axial direction.
Even if the lump 58 is large enough to be accommodated in the box 7, it can be easily sent.

The space 57 for sealing the earth and sand is
Is determined by the outer diameter of the male roller portion 13 and the outer diameter of the spiral blade 14.

Then, the earth and sand is moved to the earth and sand discharge port 9 and dropped into the transport pipe 3. Compressed air flows in the transport pipe 3 in the axial direction, and the sediment dropped into the transport pipe 3 is pumped by the compressed air.

On the other hand, the compressed air is always sent into the transport pipe 3 and is at a high pressure. However, the space 57 in which the earth and sand are hermetically sealed disappears and does not return to the upstream side.
The compressed air inside does not leak to the outside, and the pressure in the transport pipe 3 can be easily maintained. And the earth and sand do not leak outside.

Since the male rotor 6 and the female rotor 7 continuously send the earth and sand one after another, the earth and sand can be continuously pushed into the transport pipe 3 and the earth and sand can be stably transported. When the rotors 6 and 7 are rotating, grease is always supplied to the annular seals 44 and 45 through the grease supply path 52. The grease includes the annular seals 44 and 45 and the shafts 11 and 1.
5, reduce the friction and enhance the sealing effect.

The grease is discharged to the outside of the casing 10 from the grease collection / sand inspection passage 53. When the seal is fully functioning, earth and sand do not enter the annular seals 44 and 45 beyond the packing 48, and only grease is discharged from the grease collection / sand inspection passage 53.

Therefore, by checking whether or not the grease discharged from the grease collection / sand inspection passage 53 contains the earth and sand, it is possible to easily know whether or not the annular seals 44 and 45 are abnormal. .

When nothing is discharged from the grease collection / sand inspection passage 53, it is possible to know that the supply amount of grease may be insufficient.

When the earth and sand transport device 1 is operated for a long period in this way, the sand and sand supply device 4 wears each part.

The female screw portion 16 of the female rotor 7 is worn by being rubbed by the spiral blade 14 of the male rotor 6, and the collar 55 provided on the shaft portions 11 and 15 is worn by friction with the annular seals 44 and 45. The inner surface of 10 is worn by friction with earth and sand.

As shown in FIG. 9, the female screw portion 16 is worn so as to round the corner 58 at the entrance of the spiral groove 18. When repairing the female screw portion 16 thus worn, first,
The central hood portion 37 covering the outer periphery of the male screw portion 12 and the female screw portion 16 is removed, and metal is put on the worn corner 58 at the entrance of the spiral groove 18 by welding. Then, a mold gauge of a predetermined shape is applied to the metal piled up by the welding, and the metal is repaired to a predetermined shape by grinding with a grinder so as to match the shape of the mold gauge.

When the collar 55 shown in FIG. 4 is worn, the central hood portion 37, the discharge side hood portion 36 and the earth and sand introduction portion 8 are removed, and the upper end face portion 40, 41, and the female rotor 7 is removed. Then, the collar 55 provided on the female rotor 7 is removed and replaced with a new collar 55.

Regarding the male rotor 6, similarly, the male rotor 6
After the lower end portions 38 and 39 are removed while supporting, for example, the male rotor 6, the male rotor 6 is removed, and the collar 55 provided on the male rotor 6 is replaced with a new collar 55.

When the inner surface of the casing 10 is worn, the central hood 37 is removed, and the liner 56 provided on the inner surface of the central hood 37 is replaced.

As described above, the male rotor 6 having the male screw shape, the female rotor 7 having the female screw shape meshing with the male rotor 6, and surrounding the rotors 6, 7, and having one end of the earth and sand introduction portion at one end. And a casing 10 having a sediment discharge port 9 connected to the transport pipe 3 at the other end, and the sediment supply device 4 is constituted. The earth and sand can be satisfactorily pushed into the inside, and massive earth and sand can be easily transported.

The shaft portion 1 of the male rotor 6 and the female rotor 7
A second gear 22 and a third gear 2 meshing with each other;
3, the rotors 6 and 7 are driven to rotate, so that the load on the spiral blades 14 of the male rotor 6 and the spiral grooves 18 of the female rotor 7 can be reduced.
Damage and wear can be suppressed.

Since the second gear 22 and the third gear 23 are fixed by pressure to the shafts 11 and 15 via the mounting member 24, when an excessive load is applied to the rotors 6 and 7 due to biting of earth and sand, for example. To allow the load to escape
Particularly, the female rotor 7 having a small diameter can be prevented from being screwed at the center.

The shaft portion 1 of the male rotor 6 and the female rotor 7
Shafts 11 and 1 are inserted into annular seals 44 and 45 through which
5 and seal members 49, 50, 5 of annular seals 44, 45
A grease supply path 52 for supplying grease is formed between the first and second grease supply paths. The grease supply path 52 is located on the shaft end side with respect to the grease supply path 52, and the collected grease is discharged to the outside of the casing 10 to seal the grease. Since the grease collection / sediment inspection passage 53 for checking for leakage is formed, the grease discharged from the grease collection / sediment inspection passage 53 can be checked, so that a shortage of grease supply and sediment leakage can be easily checked. Can be easily found.

Since the collar 55 that contacts the annular seals 44 and 45 is replaceably provided on the male shaft 11 of the male rotor 6 and the female shaft 15 of the female rotor 7, maintenance of the shafts 11 and 15 is easy. Can be done.

Since the casing 10 is formed so as to be dividable, the handling weight after division can be reduced to several tons, and the maintenance of the casing 10 and the like can be performed with the minimum required disassembly.

Further, since the spiral blade 14 of the male rotor 6 is formed of a wear-resistant metal material and the female rotor 7 is formed of a metal material softer than the spiral blade 14, the spiral blade 14 which is difficult to repair after abrasion is difficult. Wear can be prevented and maintenance can be easily performed.

Since the wear-resistant liner 56 is replaceably provided on the inner surface of the casing 10, the casing 10
When the inside of the member is worn, maintenance can be easily performed simply by replacing the liner 56 with a new one.

In the present embodiment, the second gear 22 and the third gear 23 are fixed to the shaft portions 11 and 15 by crimping via the mounting member 24. However, if one of them is fixed by crimping. Good.

[0082]

In summary, according to the present invention, the following excellent effects can be obtained. (1) It is easy to maintain the pressure in the transport pipe and stop water. (2) The earth and sand can be favorably pushed into the transport pipe. (3) Lumps of earth and sand can be easily transported.

[Brief description of the drawings]

FIG. 1 is a side view of a sediment transporting apparatus showing a preferred embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is an enlarged view of a main part of FIG. 2;

FIG. 5 is a perspective view of a mounting member.

FIG. 6 is an explanatory diagram of division of the earth and sand supply device.

FIG. 7 is an explanatory diagram of division of the earth and sand supply device.

FIG. 8 is a side view of the female rotor.

FIG. 9 is an enlarged view of a main part of FIG. 8;

FIG. 10 is a side view of a male rotor.

FIG. 11 is an enlarged view of a main part of FIG. 10;

FIG. 12 is a schematic side view of a conventional earth and sand transport device.

FIG. 13 is a schematic side view of a conventional earth and sand transport device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sediment transport apparatus 3 Transport pipe 4 Sediment supply apparatus 6 Male rotor 7 Female rotor 8 Sediment introduction part 9 Sediment discharge port 10 Casing 11 Male side shaft part (shaft part) 14 Spiral blade 15 Female side shaft part (shaft part) 22nd 2 gear (gear) 23 third gear (gear) 44 annular seal 45 annular seal 49 first oil seal (seal member) 50 second oil seal (seal member) 51 third oil seal (seal member) 52 grease supply path 53 Grease collection / sand check passage 55 color 56 liner

Continuing from the front page (72) Inventor Akio Kojima The first 6 Kojima Gumi Co., Ltd., Minato-ku, Nagoya, Aichi Prefecture (72) The inventor Tadao Narita The 1st 6 Koba-cho, Kiba-cho, Minato-ku, Nagoya, Aichi Kuminai (72) Inventor Shingo Tateiwa 11-1, Kitahama-cho, Chita-shi, Aichi Prefecture Ishikawajima-Harima Heavy Industries, Ltd.Aichi Plant (72) Inventor Hiroaki Tomimatsu 11-1, Kitahama-cho, Chita-shi, Aichi, Japan Ishikawajima-Harima Heavy Industries, Ltd. Inside the factory (72) Inventor Toshio Suzuki 11-1 Kitahama-cho, Chita-shi, Aichi Prefecture Inside Aichi Factory, Harima Heavy Industries, Ltd. (72) Inventor Hirotaka Toyama 1-2-2 Kanda Ogawamachi, Chiyoda-ku, Tokyo IH Corporation・ I Marine

Claims (8)

[Claims] 1. A sediment in which muddy soil such as dredged soil is charged, and a sediment supply device that transports the sediment while maintaining high pressure in the transport pipe is connected to a transport pipe that pumps the soil with compressed air. In the transportation device, the earth and sand supply device includes a male rotor having a male screw shape, a female rotor having a female screw shape that meshes with the male rotor, and a sediment introduction portion at one end while surrounding the rotor. And a casing having, at the other end, a sediment discharge port connected to the transport pipe. 2. The earth and sand transport device according to claim 1, wherein gears meshing with each other are provided on the shafts of the male rotor and the female rotor to rotate both rotors. 3. The earth and sand transport device according to claim 2, wherein at least one of the gears is fixed by pressure bonding to a shaft of the rotor so that the gear runs idle when an excessive load is applied to the rotor. 4. A shaft of the male rotor and the female rotor is rotatably supported by a bearing provided on the casing through an annular seal, and grease is provided between the shaft and the seal member of the annular seal by the annular seal. Grease collection for forming a grease supply path for supplying the grease, collecting grease located on the shaft end side with respect to the grease supply path, and discharging the collected grease outside the casing to check for seal leakage. The earth and sand transport device according to any one of claims 1 to 3, wherein the earth and sand inspection passage is formed. 5. The earth and sand transport device according to claim 4, wherein a collar that contacts the annular seal is exchangeably provided on the male rotor shaft and the female rotor shaft. 6. The earth and sand transport device according to claim 1, wherein said casing is formed so as to be dividable. 7. The earth and sand transport device according to claim 1, wherein the spiral blade of the male rotor is formed of a wear-resistant metal material, and the female rotor is formed of a metal material softer than the spiral blade. 8. The earth and sand transporting apparatus according to claim 1, wherein a wear-resistant liner such as a steel plate is replaceably provided on an inner surface of the casing.