JP2901233B2 - Suction car - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction truck for sucking and recovering industrial waste such as sludge, earth and sand, and waste liquid.

[0002]

2. Description of the Related Art Generally, industrial wastes such as sludge, earth and sand, and waste liquid generated at construction work sites and sewage treatment plants are treated at predetermined treatment plants. Suction vehicles are well known for collecting such industrial waste and transporting it to a treatment plant.

[0003] An example of such a suction wheel is shown in FIG. 10A is a rear side view of the suction wheel, and FIG. 10B is a view of the suction wheel of FIG. 10A as viewed from the rear side.

As shown in the figure, a suction truck 100 is set to a vacuum state by a blower or the like, and has a hopper (tank) 102 for collecting industrial waste such as sludge, and a hopper 10.
2 that is capable of opening and closing the rear opening (rear hatch). A suction tube 112 is provided in the door section 106.
And two drain pipes 113 and 114 are provided. Each of these tubes 112, 113, 114 is a door part 1
06 extends through one end of the hopper 102.
Opening / closing valves 107, 108, and 109 are provided at the other end portions that protrude inward and protrude to the outside, respectively. In particular, one end side of the suction pipe 112 protruding into the hopper 102 extends to a position above the hopper 102 so as to obtain a strong suction force and not to hinder the suction by deposits in the hopper 102.

When the sludge 101 collected in the groove 105 or the like is suctioned and collected by the suction wheel 100, first, one end of the suction hose 103 is connected to the open / close valve 10 of the suction pipe 112.
7 and the other end of the hose 103 is immersed in the sludge 101. Then, in this state, if the open / close valve 107 is opened, the sludge 101 is sucked and collected from the suction pipe 112 into the hopper 102 through the hose 103 by the suction force caused by the negative pressure in the hopper 102.

[0006]

By the way, depending on the situation at the work site, a liquid such as water which is not the object to be collected may be inevitably sucked together with the object to be collected.
In particular, the sludge 101 contains a large amount of water in the earth and sand. When such a sludge 101 is sucked, the earth and sand having a large specific gravity is sequentially deposited on the bottom of the hopper 102, but the other waste water is Water 110 accumulates above the soil and accumulates. When the object to be collected is earth and sand, it is necessary to discharge such clean water 110 from the hopper 102 to the outside in order to increase the accumulation rate of earth and sand in the hopper 102.

Conventionally, as shown in FIG. 10, drain pipes 113 and 114 are provided in the door portion 106, and the clean water 110 is discharged from the hopper 102 by the drain pipes 113 and 114, so that the recovery rate of the object to be recovered is improved. I try to improve.

However, in such drainage using a drainage pipe, drainage may not be performed properly depending on the installation position (drainage position) of the drainage pipe. That is, when the drain pipe is attached at a very low position of the door unit 106 (that is, when the drain pipe is opened at a very low position in the hopper 102), if the sediment accumulates to that position. Then, the opening of the drain pipe is closed by the earth and sand, and the water 110 accumulated on the upper side of the earth and sand is not drained. Further, when the drain pipe is attached at a very high position of the door portion 106 (that is, when the drain pipe is opened at a very high position in the hopper 102).
Can only discharge the water 110 above the opening of the drain pipe. In other words, if the water 110 does not accumulate to the height of the opening of the drain pipe, the water 110 will not be discharged. Therefore, when only the undischarged clean water 110 accumulates and sediment does not accumulate at all, the work efficiency becomes very poor.

Therefore, conventionally, in order to reduce such a problem due to the mounting position of the drain pipe, a plurality (two in the figure) of drain pipes 113 and 114 are provided in the height direction as shown in FIG. Like that. That is, the hopper 1
The drain pipes 113 and 114 are opened at different heights in the area 02. In this case, the drain pipe 11
As shown in the figure, the positions of the open / close valves 108 and 109 of the drain pipes 113 and 114 are different from each other in the height direction.

[0010] Regardless of the water level of the clean water 110, the clean water 110
In order to discharge wastewater efficiently, it is desirable to provide as many drainage pipes as possible at different positions in the height direction. However, as in the conventional example of FIG. 10, when a plurality of drain pipes are provided at different positions in the height direction, and accordingly, the opening and closing valves of the drain pipes are differently positioned in the height direction, Unnecessarily providing a large number of drain pipes may cause a reduction in work efficiency. That is, when draining the clean water 110 with such a configuration, it is necessary to open each open / close valve by assuming the water level of the clean water 110 in the hopper 102 that cannot be observed from the outside to some extent. In addition, a complicated operation of sequentially opening and closing a number of on-off valves and confirming the drainage position must be performed.
This is very cumbersome.

In view of this, it is conceivable to provide a viewing window from which the state of deposition in the hopper 102 can be grasped, and to specify an open / close valve to be opened by the viewing window. However, if the inside of the viewing window is contaminated by deposits in the hopper 102, the boundary between the object to be collected (eg, earth and sand) and clean water may be difficult to understand. It is difficult to determine which open / close valve should be opened, and a complicated operation such as opening / closing the open / close valve sequentially must be performed. The operation of sequentially opening and closing the open / close valve to check the drain position involves attaching and detaching a drain hose to the open / close valve each time. Although relatively large force is required only for opening and closing the opening and closing valve,
The work of attaching a heavy drainage hose to the open / close valve at a high position requires a great deal of labor.

As described above, conventionally, an open / close valve is individually provided at the outer end of each drain pipe, and when each drain pipe is provided at a different position in the height direction, a drain hose is provided. The position of the opening / closing valve, which is the mounting position, is also different in the height direction, thereby causing the various problems described above.

The present invention has been made in view of the above circumstances, and an object of the present invention is to reliably and efficiently discharge clean water from a hopper irrespective of the clean water level. An object of the present invention is to provide a suction vehicle that can improve the efficiency of the suction operation by improving the accumulation ratio of the collection target in the above.

[0014]

In order to solve the above-mentioned problems, a suction wheel according to the present invention comprises a hopper for sucking and collecting an object to be collected, and discharging a liquid which is a non-collection object accumulated in the hopper. And a plurality of branch pipes each branching from the discharge pipe and opening at different heights in the hopper. A valve that opens and closes the opening so as to allow the flow of the liquid through the branch pipe and block the flow of the object to be collected at the opening of each branch pipe located in the hopper. A mechanism is provided.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 5 schematically shows a suction wheel 1 according to an embodiment of the present invention. As shown in the figure, a suction car 1 includes a hopper (tank) 2 for collecting industrial waste such as sludge, a suction mechanism 4 for setting the inside of the hopper 2 to a vacuum state by a blower or the like, and a hopper 2.
Door 6 that can be opened and closed to close the rear hatch (rear opening)
And

The suction mechanism 4 feeds the intake air contaminated with sludge, earth and sand, waste liquid, dust and the like at the time of suction from the hopper 2 to the intake pipe 3.
After being converted into a clean gas through the exhaust gas, the gas is exhausted through the exhaust pipe 5.

As shown in detail in FIG. 1, the door portion 6 is attached to the rear hatch of the hopper 2 so as to be pivotable about a pivot shaft 23. Specifically, a bracket 24 fixed to an upper portion of the door unit 6 is rotatably mounted on a pivot shaft 23 fixed and supported near the rear hatch of the hopper 2.

Rod portions of hydraulic cylinders 20, 20 fixed to the left and right side walls of the hopper 2 are fixed to brackets 21, 21 fixed to both side portions of the door portion 6, respectively. Therefore, if the hydraulic cylinders 20 are expanded and contracted, the door portion 6 can be turned around the turning shaft 23 in the direction indicated by the arrow in FIG. A hydraulic cylinder (not shown) is provided between the hopper 2 and the vehicle body, and the hopper 2 can be raised rearward by extending a rod portion of the hydraulic cylinder. I can do it. Thus, a dumping operation of throwing away the deposits in the hopper 2 through the open door unit 6 can be performed.

A hydraulic cylinder 50 for locking a closed state of the rear hatch of the hopper 2 with the door portion 6 is fixed to both rear side walls of the hopper 2. A wedge is attached to the tip of the rod portion of the hydraulic cylinder 50, the rear hatch of the hopper 2 is closed by the door portion 6, and a predetermined hole provided on the hopper 2 side and a predetermined hole provided on the door portion 6 side are provided. When the rod portion of the hydraulic cylinder 50 is extended and the wedge at the tip of the rod portion is driven into both holes in a state where the holes are aligned with each other, the closed state of the rear hatch of the hopper 2 by the door portion 6 is firmly strengthened. Locked hopper 2
The airtightness inside is improved.

A suction pipe 33 is provided at the center of the lower part of the door section 6.
Is provided. The suction pipe 33 extends through the door portion 6, and has one end protruding into the hopper 2, and the other end protruding to the outside and an open / close valve 34.
have. In this case, one end side of the suction pipe 33 protruding into the hopper 2 extends to a position above the hopper 2 so as to obtain a strong suction force and not to hinder the suction by deposits in the hopper 2.

A drain pipe 30 is attached to the door section 6. The drain pipe 30 includes a pipe main body 30f extending along the height direction of the door section 6, and a plurality of pipe sections 30a to 30e branched from the pipe main body 30f. These pipe portions 30a to 30e are provided at predetermined intervals along the longitudinal direction (height direction) of the pipe main body 30f,
It extends substantially perpendicularly to the tube body 30f, penetrates through the door part 6, and its end protrudes into the hopper 2. Specifically, the uppermost tube portion 30a is located at a height near the ceiling surface of the hopper 2, the lowermost tube portion 30e is located at a height near the bottom surface of the hopper 2, and the remaining three Pipe parts 30b-3
0d are located at substantially equal intervals in the height direction between the tube portion 30a and the tube portion 30e.

The pipe main body 30f has an upper end communicating with the uppermost pipe part 30a, and has an opening / closing valve 32 at the lower end. The lower end position of the pipe main body 30f is a position where a worker can easily attach a drain hose (not shown) to the opening / closing valve 32.

Each pipe portion 30a projecting into the hopper 2
A valve mechanism 40 is provided at each of the end portions to 30e. As shown in detail in FIG. 2, the valve mechanism 40 includes a shaft portion 62 rotatably supported by a reinforcing plate 65 fixed to an outer peripheral wall of an end portion of the tube portion 30a (30b to 30e), and a shaft portion. 62
To the tube 30a.
The valve body 42 includes a valve body 42 that closes the opening (30b to 30e) and a float 41 attached to the valve body 42. Normally, the valve body 42 hangs downward as shown by a solid line in the drawing to close the opening of the pipe portion 30a (30b to 30e) due to its own weight, but when the float 41 floats on a liquid such as water, the buoyancy causes As shown by the dashed line in the figure, it swings around the shaft portion 62 and floats up to open the opening of the tube portion 30a (30b to 30e).

The valve mechanism 40 has a valve opening restricting means 90 for restricting the amount of swing of the valve 42, that is, the opening of the valve 42. The valve opening restricting means 90 includes an extending portion 60 extending from the shaft portion 62 and rotating (along with the shaft portion 62) by the rotation of the shaft portion 62 accompanying the swing of the valve body 42, and the extending portion 6.
At a position where the regulating bolt 61 that is screwed into the portion 0 and the projecting portion of the regulating bolt 61 that protrudes downward from the extending portion 60 can be in contact with the outer peripheral wall of the end portion of the pipe portion 30a (30b to 30e). And a stopper 64.

According to the valve opening restricting means 90, the lower end of the protruding portion of the restricting bolt 61 protruding below the extending portion 60 comes into contact with the stopper 64, as shown by the one-dot chain line in the figure. Since the rotation of the valve body 62 can be regulated, the swing of the valve body 42 can be regulated accordingly, and as a result, the opening degree of the valve body 42 can be regulated.

The restricting bolt 61 for the extension 60
By changing the amount of screwing of the regulating bolt 61 to change the amount of protrusion of the regulating bolt 61 projecting below the extension 60,
Since the amount of rotation of the shaft portion 62 required until the 1 contacts the stopper 64 can be changed, the movable amount of the valve body 42 can be changed, and the maximum opening degree of the valve body 42 can be arbitrarily adjusted. It becomes possible.

At the end of the pipe 30a (30b to 30e), there is provided a valve opening holding means 95 for holding the opening of the valve body 42 at a predetermined opening. This valve opening holding means 9
5 is provided at a position where it can come into contact with the valve body 42 and
0a (30b to 30e) is formed of a bolt 68 that can protrude forward from the open end. The bolt 68 is connected to the pipe 30
a (30b to 30e) is screwed to a holding portion 67 fixed to the outer peripheral wall of the end portion, and the amount of screwing into the holding portion 67 is changed so as to change the amount of projection forward.
As shown by an alternate long and short dash line in FIG.
Can be maintained at a predetermined opening.

The bolt 68 is in a retracted state in which it is separated without contacting the valve body 42 which is normally in a closed state (a state of a solid line hanging downward). During the working operation, the valve body 42 is
Is maintained at a predetermined opening.

Next, a case where the sludge is sucked and collected by the suction wheel 1 having the above-described structure will be described. First, one end of a suction hose (not shown) is connected to the open / close valve 34 of the suction pipe 33, and the other end of the suction hose is immersed in sludge. Then, in this state, if the open / close valve 34 is opened, the hopper 2
The sludge is sucked and collected from the suction pipe 33 into the hopper 2 through the suction hose by the suction force caused by the negative pressure in the inside.

Since the sludge contains a lot of water in the soil, when the sludge is sucked, the soil having a large specific gravity is sequentially deposited on the bottom of the hopper 2, but the other wastewater is placed on the upper side of the soil. Water 10 (see FIG. 1) accumulates. When the object to be collected is earth and sand, such clean water 10 is drained from the drain pipe 3 to increase the sedimentation rate of the earth and sand in the hopper 2.
It is necessary to discharge the hopper 2 to the outside due to 0.

It should be noted that what accumulates on the upper side of the earth and sand is not limited to water, but also includes other liquids that are not the object to be collected (here, earth and sand). .

In this embodiment, when the open / close valve 32 of the drain pipe 30 is opened, the water 10 is automatically discharged through the drain pipe 30 by the action of the valve mechanism 40 regardless of the water level of the water 10. . That is, when the float 41 is immersed in the tap water 10, the buoyancy of the float 41 causes the valve body 42 to swing about the shaft 62 and the pipe 3
The openings 0a to 30e are opened, and the drainage of the clean water 10 through the pipe portions 30a to 30e is enabled. Further, the valve mechanism 40
When the sediment deposited in the hopper 2 leans against the valve element 42, the pressing force closes the valve element 42, and the pipe parts 30a to 30a.
Prevent outflow of earth and sand through 30e. Therefore, as the water level of the clean water 10 rises with the progress of the suction operation, the valve mechanism 40 is sequentially moved from the lower pipe portion (30e-).
Of the lower pipe portion (30) is automatically opened due to an increase in the amount of sediment deposited with the progress of the suction operation.
The valve body 42 of the valve mechanism 40 automatically closes sequentially from e).

That is, the discharge of the clean water 10 is automatically performed according to the water level, and at the same time, the outflow of earth and sand is reliably prevented. Of course, when the openings of the plurality of pipes 30a to 30e are immersed in the clean water 10, the clean water 10 is drained only from the immersed plurality of pipes 30a to 30e.

As described above, according to the drain pipe 30, the water supply 1
Since the valve body 42 of each of the pipe parts 30a to 30e immersed in 0 is always open, if one open / close valve 32 is opened regardless of the water level of the clean water 10, at least one of the pipe parts 30a to 30e is opened. Therefore, the clean water 10 is constantly drained. Conventionally, the valve mechanism 40 automatically performs the operation in which the operator opens the valves one by one to check the drainage position, and the drainable pipe sections 30a to 30e are automatically selected. .

The clean water 10 drained from the pipe sections 30a to 30e is discharged from the open / close valve 32 through the pipe main body 30f via a drain hose. Also, if the opening of the valve element 42 is too large, the pressing force of the earth and sand causes the valve element 42
May be difficult to close. Therefore, it is desirable that the maximum opening degree of the valve body 42 be adjusted in advance by the valve opening degree regulating means 90 to an appropriate opening degree such that the valve body 42 can be easily closed by earth and sand.

When the water 10 in the hopper 2 is sucked through the drain pipe 30 by the sewage treatment vehicle, the valve mechanism 42 of the present embodiment closes the valve body 42 due to the suction action received from the sewage treatment vehicle. , Water 10 in hopper 2
Can not be sucked. Therefore, in this embodiment, when the clean water 10 is sucked by the sewage treatment vehicle, the bolt 68 of the valve opening holding means 95 is caused to protrude forward by a predetermined amount so as to be brought into contact with the valve body 42, and The opening of 42 is maintained at a predetermined opening.

A modification of the valve mechanism 40 of the present embodiment is shown in FIGS. The valve mechanism 40a shown in FIG. 3 includes a hollow float valve 70 that is swingably mounted near the ends of the pipes 30a to 30e. The float valve 70 normally has the tube portions 30a to 30d due to its own weight.
The pipe sections 30a to 30e are held in contact with the tapered end face 71 of the pipe section 30e.
Although the opening of 30e is closed, when it is immersed in the tap water 10, it oscillates by buoyancy and rises, and the pipe portions 30a to 3
Open the opening of 0e. The float valve 70 is connected to the hopper 2
Closed by the pressing force of the sediment deposited in
Prevent outflow of earth and sand through 30e.

On the other hand, the valve mechanism 40a shown in FIG. 4 comprises a valve body 72 swingably mounted near the ends of the pipe sections 30a to 30e. The valve body 72 always opens the openings of the pipe sections 30a to 30e by its own weight. The opening of the valve body 72 is regulated by a stopper 73. The valve body 72 is closed by the pressing force of the earth and sand deposited in the hopper 2, and prevents the earth and sand from flowing out to the outside through the pipe portions 30a to 30e.

As described above, in the suction wheel 1 of the present embodiment, in order to efficiently discharge the clean water 10 regardless of the water level of the clean water 10, the plurality of pipe portions 30a to 30e are different in height direction. The pipe portions 30a to 30e are collectively connected to the pipe main body 3 so that the complicated operation of checking the drain position by sequentially opening and closing the opening and closing valves is not required.
0f, and only one open / close valve 32 is provided at the end of the tube main body 30f. That is, according to the suction wheel 1 of the present embodiment, the hopper 2 that cannot be observed from the outside
It is not necessary to open each open / close valve by assuming the water level of the clean water 10 to some extent, and it is not necessary to attach a heavy drain hose to the open / close valve at a high position.

Further, the suction wheel 1 of the present embodiment includes
0a to 30e, a valve mechanism 40 is provided.
The water 0 is automatically drained from the drain pipe 30 by the action of 0. Thereby, the discharge of the clean water 10 is automatically performed according to the water level, and almost all of the clean water is drained. On the other hand, the outflow of earth and sand is reliably prevented by the action of the valve mechanism 40 described above. That is, the valve mechanism 40 can automatically perform the operation in which the operator conventionally opens the valves one by one to check the drain position.

As described above, the suction wheel 1 according to the present embodiment can discharge the almost entire amount of the clean water 10 from the hopper 2 reliably and efficiently regardless of the water level of the clean water 10, thereby recovering the clean water in the hopper 2. The efficiency of the suction operation can be increased by increasing the accumulation ratio of the target object.

FIG. 6 shows a first modification of the drain pipe 30. The illustrated drain pipe 45 includes a pipe body 45 e that extends obliquely along the height direction of the door portion 6,
e (four in the figure) branch parts 45a to 45
d. These pipe portions 45a to 45d are provided at predetermined intervals along the longitudinal direction (height direction) of the pipe main body 45e, extend substantially perpendicular to the pipe main body 45e, and penetrate the door portion 6. The end protrudes into the hopper 2.

The tube body 45e has an upper end communicating with the uppermost tube portion 45a, and has an opening / closing valve 46 at the lower end. Also, each pipe portion 4 protruding into the hopper 2
The valve mechanism 40 (or 4) is provided at each end of 5a to 45d.
0a, 40b) are provided.

According to such a configuration, it is very useful when the installation position of the drainage pipe is restricted by other components attached to the door portion 6. In addition, pipe parts 45a-
The extending direction of the drain pipe 45 (the pipe main body 45e) is not limited to that shown in FIG.

FIG. 7 shows a second modification of the drain pipe 30. The illustrated drain pipe 55 includes a first pipe main body 55h that extends vertically along the height direction of the door portion 6, and a first pipe main body 55h that branches off from the vicinity of the lower end of the first pipe main body 55h.
h and a second pipe main body 55i extending vertically along the height direction of the door portion 6 at a position separated by a predetermined distance.

From the first pipe main body 55h, a plurality of pipes (4
) Pipe portions 55a to 55d are branched. These pipe portions 55a to 55d are provided at predetermined intervals along the height direction of the first pipe main body 55h, and extend substantially at right angles to the first pipe main body 55h to extend the door portion 6. Penetrate,
The end protrudes into the hopper 2. Also in this case, as in the first embodiment, the uppermost tube portion 55a is located at a height near the ceiling surface of the hopper 2, and the lowermost tube portion 55d is provided.
Is located at a height near the bottom surface of the hopper 2, and the remaining 2
The two pipe parts 55b and 55c are located at substantially equal intervals in the height direction between the pipe parts 55a and 55d. In addition,
The first pipe main body 55h has an upper end whose upper end is a pipe section 55a.
And an open / close valve 56 at the lower end thereof.

A plurality (three in the figure) of tube portions 55e to 55g are branched from the second tube body 55i. Each of these pipe parts 55e to 55g is a second pipe body 55
i, which are provided at predetermined intervals along the height direction, extend substantially at right angles to the second pipe main body 55i, penetrate the door portion 6, and the end portion thereof protrudes into the hopper 2. I have. In this case, the height at which the uppermost tube portion 55e is located depends on the height of the uppermost tube portion 55a on the first tube main body 55h side and the tube portion 55b.
The height at which the pipe 55f is located is substantially the center of the height of the pipe 55b and the height of the pipe 55c, and the height at which the pipe 55g is located is the height of the pipe 55c. Sato tube part 55
It is approximately at the center of the height of d. That is, the seven pipe portions 55a to 55g are alternately positioned at substantially equal intervals along the height direction of the door portion 6, and are respectively opened at different height positions from the vicinity of the bottom of the hopper 2 to the vicinity of the ceiling surface. doing.

It is needless to say that the valve mechanism 40 (or 40a, 40b) shown in the first embodiment is provided at the end of each of the pipe portions 55a to 55g projecting into the hopper 2. No.

In the first embodiment, when a large number of pipes are arranged along the height direction of the pipe main body 30, the pipes may come close to each other and the valve mechanism 40 (or 40a, 40b) may not be attached. In the configuration of FIG. 7, there are provided two pipe bodies 55h and 55i extending along the height direction of the door portion 6 and communicating with each other at a predetermined distance from each other.
A large number of pipe parts 55a to 55g in one pipe main body 55h, 55i.
Are arranged so that the valve mechanism 40 (or 40a, 40b) cannot be attached to the tube portion, and a large number of tube portions are arranged along the height direction of the door portion 6 without inconvenience. can do.

FIG. 8 schematically shows another structure capable of discharging clean water from the hopper 2 irrespective of the clean water level. As illustrated, a drain pipe 80 having one open / close valve 81 is attached to the door section 6. This drainage pipe 8
The reference numeral 0 penetrates through the door portion 6, and its end protrudes into the hopper 2. One end of a drain hose 82 arranged in the hopper 2 is connected to an end of a drain pipe 80 projecting into the hopper 2. Also, at the other end of the drain hose 82,
Float 8 floating on water (tap water) 10 via drainage body 83
4 are connected. In the figure, S is a collection target such as earth and sand deposited in the hopper 2.

In this configuration, the water 10
Accumulates, the float 84 is immersed in the water 10 and floats by its buoyancy. Therefore, the drain hose 82
The opening of the drain pipe 83 is always immersed in the clean water 10, and the clean water 10 is always in the drain hose 8 regardless of the water level.
Exhausted through 2. In this case, since the drainage pipe 83 with the float 84 can move while floating on the surface of the water 10, all the water 10 in the hopper 2 is reliably discharged. When draining the clean water 10 through the drain hose 82, a drain hose (not shown) of the sewage treatment vehicle is attached to the drain pipe 80, and the clean water 10 is drained by a positive suction action from the sewage treatment vehicle side. Suction and discharge through 82 and the drainage hose on the sewage treatment vehicle side. Further, it is desirable that the length of the drain hose 82 be as long as possible so that the exhaust pipe 83 with the float 84 can move over the entire area of the hopper 2.

FIG. 9 also shows a configuration in which clean water can be discharged from the hopper 2 irrespective of the clean water level. As shown in the drawing, a connection pipe 87 is connected in a sealed state from the outside to an opening 2 a provided substantially at the center of the ceiling surface of the hopper 2, and an outside drainage hose 88 is connected to the connection pipe 87. At the opening 2a, a connection pipe 86 is connected to the connection pipe 87 from the inside of the hopper 2 in a sealed state. In this case, the connection pipe 86 is rotatable with respect to the connection pipe 87, thereby forming a rotary seal capable of maintaining a vacuum state in the hopper 2.

A connecting pipe 85 is rotatably connected to the connecting pipe 86, and one end of an inner drainage hose 88 disposed in the hopper 2 is connected to the connecting pipe 85. In this case, rotation axis O ₂ of the connecting pipe 85 is perpendicular to the rotation axis O ₁ of the rotary seal. That is,
The connecting pipe 85 can rotate around two axes O ₁ and O _{2 which} are perpendicular to each other. A float 84 floating on the water (water) 10 is connected to the other end of the inner drainage hose 88 via a drainage body 83.

Therefore, if the outside drainage hose 88 is connected to the sewage treatment vehicle side and suction is actively performed on the sewage treatment vehicle side, the clean water 10 can be sucked and discharged through the drainage hoses 82 and 88. In this case, the two axes O ₁ ,
By the action of the connecting pipe 85 rotatable around O ₂ , the discharge pipe 83 with the float 84 can move while floating on the surface of the clean water 10, and the clean water 10 in the hopper 2 is completely discharged. You.

[0055]

As described above, according to the suction wheel of the present invention, the clean water can be reliably and efficiently discharged from the hopper regardless of the clean water level. The efficiency of the suction operation can be increased by increasing the deposition ratio.

[Brief description of the drawings]

FIG. 1A is a rear side view of a suction wheel according to an embodiment of the present invention, and FIG. 1B is a rear view of the suction wheel of FIG.

FIG. 2 is a configuration diagram showing in detail a valve mechanism provided in a drain pipe of the suction vehicle in FIG. 1;

FIG. 3 is a schematic diagram showing a first modification of the valve mechanism.

FIG. 4 is a schematic view showing a second modification of the valve mechanism.

FIG. 5 is an overall view of a suction wheel according to an embodiment of the present invention.

FIG. 6 is a schematic diagram showing a first modification of the drain pipe.

FIG. 7 is a schematic view showing a second modification of the drain pipe.

FIG. 8 is a schematic diagram showing another configuration capable of discharging clean water from the hopper regardless of the clean water level.

FIG. 9 is a schematic view of a drainage mechanism that can perform the same operation as FIG.

10A is a rear side view of a conventional suction wheel, and FIG.
FIG. 3A is a rear view of the suction wheel shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Suction truck 2 ... Hopper 6 ... Door part 10 ... Water supply 30 ... Drainage pipe (discharge pipe) 30a-30e ... Branch pipe part 32 ... Opening / closing valve 40 ... Valve mechanism 41 ... Float 42, 72 ... Valve body 70 ... Float Valve 90: Valve opening regulating means (adjusting means) 95: Valve opening holding means

Continued on the front page (72) Inventor Akio Munemura 3-29-13-203 Yatsu, Narashino-shi, Chiba (72) Inventor Hirohiko Takekawa 1-15-6 Higashioi, Shinagawa-ku, Tokyo (58) Fields surveyed (Int. Cl. ⁶ , DB name) E02F 3/88

Claims (3)

(57) [Claims] A hopper for suctioning and collecting an object to be collected;
In a suction car provided with a discharge pipe for discharging a liquid which is a non-recovery object accumulated in the hopper, the discharge pipe is provided with one opening / closing valve provided at an end thereof and a discharge pipe respectively. A plurality of branch pipes that are branched and open at different heights in the hopper, wherein the openings of the respective branch pipes located in the hopper allow the liquid to flow through the branch pipes. And a valve mechanism for opening and closing the opening so as to block the flow of the object to be collected. 2. The valve mechanism according to claim 1, wherein the valve mechanism opens an opening of the branch pipe portion by buoyancy when immersed in the liquid and closes the opening by a pressing force of the object to be recovered. Suction car. 3. The suction wheel according to claim 1, further comprising adjusting means for adjusting a valve opening of the valve mechanism.