JP7621877B2 - Suction vehicle - Google Patents

Description

The present invention relates to a suction vehicle.

Patent Document 1 discloses a suction vehicle. In this suction vehicle, a collection tank is formed in a hopper, and the inside of the collection tank is depressurized by driving a blower, for example by creating a vacuum state. Then, by depressurizing the inside of the collection tank, the objects to be collected, such as soil and sand, are sucked through the suction port of the suction pipe, and the objects to be collected flow into the inside of the collection tank. Then, the objects to be collected that flow into the inside of the collection tank are deposited inside the collection tank. Also, in the suction vehicle, when the blower is driven, an air flow is formed from inside the collection tank toward the blower. Between the inside of the collection tank and the blower, a cyclone dust collector, which is a dust collector, separates dust from the air heading toward the blower. Then, the air from which the dust has been separated by the cyclone dust collector passes through the blower and is exhausted to the outside (atmosphere) from the exhaust port of the exhaust pipe.

JP 2004-033859 A

In a suction vehicle like the one in Patent Document 1, water is sprayed onto the object to be collected, such as soil and sand, and the object is sucked up and collected in a state where it is broken down by the water pressure. In such work, it is necessary to easily and appropriately secure the water that is sprayed onto the object to be collected.

The present invention has been made to solve the above problems, and its purpose is to provide a suction vehicle that can easily and appropriately ensure that water is sprayed onto a collection target when the collection target is sprayed with water and then sucked up and collected.

In order to achieve the above-mentioned object, a suction vehicle of one embodiment of the present invention comprises a recovery tank in which sucked-up recovery objects are accumulated, a blower that can be driven to reduce the pressure inside the recovery tank, a water tank in which water can be stored, a connecting pipe connecting the recovery tank and the water tank, a communication switching valve provided on the connecting pipe for switching the communication state between the interior of the recovery tank and the interior of the water tank, the communication switching valve being capable of reducing the pressure inside the water tank together with the interior of the recovery tank by connecting the interior of the recovery tank and the interior of the water tank when the blower is driven, and a water supply pipe having a water supply port that opens to the outside and an end opposite to the water supply port that is connected to the water tank, the water supply pipe being capable of supplying water flowing in from the water supply port to the interior of the water tank when the interior of the water tank is reduced in pressure together with the interior of the recovery tank .

The present invention provides a suction vehicle that can easily and appropriately ensure that water is sprayed onto a collection target in the process of spraying water onto the collection target and then sucking and collecting the collection target.

FIG. 1 is a schematic diagram showing a suction vehicle according to a first embodiment as viewed from one side in the width direction. FIG. 2 is a schematic diagram showing the suction vehicle according to the first embodiment as viewed vertically from above. FIG. 3 is a schematic diagram showing the suction vehicle according to the first embodiment as viewed from the rear side. FIG. 4 is a schematic diagram illustrating the configuration and operation of the hopper, dust collector, blower, silencer, and related parts in the suction vehicle of the first embodiment, and showing the state in which the collection target is being suctioned and collected. Figure 5 is a schematic diagram illustrating the configuration and operation of the hopper, dust collector, blower, silencer, and related parts in the suction vehicle of the first embodiment, and also showing the state in which water is being supplied inside the water tank. Figure 6 is a schematic diagram illustrating the configuration and operation of the hopper, dust collector, blower, silencer, and related parts in the suction vehicle of the first embodiment, and showing the state in which water in the water tank is being sprayed to the outside.

The following describes the embodiment with reference to the drawings.

(First embodiment)
1 to 3 show the suction vehicle 1 according to the first embodiment. In the suction vehicle 1, a front-rear direction (direction indicated by arrows X1 and X2) that intersects (orthogonal or substantially perpendicular to) the vertical direction (direction indicated by arrows Z1 and Z2), and a width direction (direction indicated by arrows W1 and W2) that intersects (orthogonal or substantially perpendicular to) both the vertical direction and the front-rear direction are defined. In FIG. 1, the suction vehicle 1 is shown as viewed from one side in the width direction, and is shown as viewed from the left side (arrow W1 side). In addition, FIG. 2 shows the suction vehicle 1 as viewed from the vertical upper side (arrow Z1 side), and FIG. 3 shows the suction vehicle 1 as viewed from the rear side (arrow X2 side).

The suction vehicle 1 comprises a running body 2. The running body 2 comprises a running body frame 3, a cab 5, and a pair of crawlers 6. The cab 5 is installed on the running body frame 3. In the cab 5, operations related to running are input by an operator or the like. The pair of crawlers 6 are attached to the running body frame 3 and are arranged apart from each other in the width direction. By operating the crawlers 6 through operations in the cab 5, the suction vehicle 1 moves forward (towards arrow X1) or backward, and becomes capable of running.

A hopper 10, dust collector 11, blower 12, and silencer 13 are mounted on the vehicle frame 3. In the suction vehicle 1, the hopper 10, dust collector 11, blower 12, and silencer 13 are arranged rearward of the driver's cab 5. The dust collector 11, blower 12, and silencer 13 are also arranged between the driver's cab 5 and the hopper 10 in the fore-and-aft direction of the suction vehicle 1.

In the suction vehicle 1, the rear end of the hopper 10 is connected to the rear end of the running body frame 3. The hopper 10 can rotate relative to the running body frame 3, centering on the connection position to the running body frame 3. The rotation axis P of the hopper 10 relative to the running body frame 3 is along the width direction of the suction vehicle 1. In the state shown in Figures 1 to 3, the hopper 10 is parallel or approximately parallel to the running body frame 3, and extends horizontally or approximately horizontally along the front-rear direction of the suction vehicle 1. The hopper 10 tilts relative to the running body frame 3 by rotating relative to the running body frame 3 from the state shown in Figures 1 to 3. At this time, the hopper 10 tilts relative to the running body frame 3 so that the more forward the portion of the hopper 10 is, the more vertically upward it is positioned.

Figures 4 to 6 explain the configuration and operation of the hopper 10, dust collector 11, blower 12, silencer 13, and related parts. As shown in Figures 1 to 6, the hopper 10 has a collection tank 15 and a water tank 16 formed as one unit. The collection tank 15 is formed adjacent to the water tank 16 on the rear side of the suction vehicle 1. The collection tank 15 and the water tank 16 are separated by a partition wall 17. Therefore, in the hopper 10, the partition wall 17 is formed between the collection tank 15 and the water tank 16 in the front-rear direction of the suction vehicle 1. In addition, the hopper 10 has an openable door 18, which is adjacent to the interior (internal space) of the collection tank 15 from the rear side. When the door 18 is open, the interior of the collection tank 15 opens toward the rear side of the suction vehicle 1 through the open part of the door 18.

A suction pipe 21 is attached to the recovery tank 15 of the hopper 10. A suction port 22 is formed at one end of the suction pipe 21, and the inside (internal space) of the suction pipe 21 opens to the outside of the hopper 10 at the suction port 22. The inside of the suction pipe 21 is connected to the inside of the recovery tank 15 at the end opposite the suction port 22. An opening/closing valve (first opening/closing valve) 23 and an operating lever 25 are attached to the suction pipe 21. The opening/closing state of the opening/closing valve 23 is switched by an operator or the like operating the operating lever 25. By switching the opening/closing state of the opening/closing valve 23, the communication state between the inside of the recovery tank 15 and the suction port 22 is switched. When the opening/closing valve 23 is open, the inside of the recovery tank 15 is connected to the suction port 22, and the inside of the recovery tank 15 is connected to the outside of the hopper 10 via the suction port 22. On the other hand, when the on-off valve 23 is closed, communication between the inside of the recovery tank 15 and the suction port 22 is blocked.

In the hopper 10, the collection tank 15 and the water tank 16 are connected by a connection pipe 26. In the hopper 10, the connection pipe 26 is extended along the front-rear direction of the suction vehicle 1 at the vertical upper part. The inside of the collection tank 15 can communicate with the inside of the water tank 16 only through the inside of the connection pipe 26. The inside (internal space) of the connection pipe 26 is connected to the inside of the collection tank 15 at connection position E1, and is connected to the water tank 16 at connection position E2. In one example such as Figures 1 to 6, the connection position E2 is located on the front side of the suction vehicle 1 with respect to the connection position E1. In addition, an opening 27 is formed in the connection pipe 26, and the inside of the connection pipe 26 opens to the outside of the hopper 10 at the opening 27.

A switching valve (communication switching valve) 31 and an operating lever 32 are attached to the connection pipe 26. In an example shown in Figs. 4 to 6, the switching valve 31 is a three-way valve. The operating state of the switching valve 31 is switched by an operator operating the operating lever 32. The switching state of the switching valve 31 switches the communication state between the inside of the recovery tank 15 and the inside of the water tank 16. That is, in response to the operating state of the switching valve 31, the inside of the connection pipe 26 switches to either a state in which the inside of the recovery tank 15 and the inside of the water tank 16 are in communication with each other, or a state in which communication between the inside of the recovery tank 15 and the inside of the water tank 16 is cut off. In a state in which the inside of the recovery tank 15 and the inside of the water tank 16 are in communication with each other, the opening 27 is cut off from communication with both the inside of the recovery tank 15 and the inside of the water tank 16. On the other hand, when communication between the inside of the recovery tank 15 and the inside of the water tank 16 is cut off, the inside of the water tank 16 is in communication with the opening 27, and the inside of the water tank 16 is in communication with the outside of the hopper 10 via the opening 27. In this case, communication between the inside of the recovery tank 15 and the opening 27 is also cut off.

A water supply pipe 33 is attached to the water tank 16 of the hopper 10. A water supply port 35 is formed at one end of the water supply pipe 33, and the inside (internal space) of the water supply pipe 33 opens to the outside of the hopper 10 at the water supply port 35. The inside of the water supply pipe 33 is connected to the inside of the water tank 16 at the end opposite the water supply port 35. An opening/closing valve (second opening/closing valve) 36 and an operating lever 37 are attached to the water supply pipe 33. The opening/closing state of the opening/closing valve 36 is switched by an operator or the like operating the operating lever 37. By switching the opening/closing state of the opening/closing valve 36, the communication state between the inside of the water tank 16 and the water supply port 35 is switched. When the opening/closing valve 36 is open, the inside of the water tank 16 is connected to the water supply port 35, and the inside of the water tank 16 is connected to the outside of the hopper 10 via the water supply port 35. On the other hand, when the on-off valve 36 is closed, communication between the inside of the water tank 16 and the water supply port 35 is blocked.

In the suction vehicle 1, a relay pipe 38 connects the collection tank 15 of the hopper 10 and the dust collector 11. Therefore, the inside of the collection tank 15 communicates with the inside of the dust collector 11 via the inside of the relay pipe 38. In addition, in the suction vehicle 1, a switching valve (flow switching valve) 40 is mounted on the vehicle frame 3. The switching valve 40 is disposed between the driver's cab 5 and the hopper 10 in the front-rear direction of the suction vehicle 1. The switching valve 40 is formed from a valve block, and in the example shown in Figures 1 to 6, etc., is a four-way valve. The switching valve 40 is connected to three relay pipes 41 to 43 and an exhaust pipe 45.

The relay pipe 41 connects the switching valve 40 and the dust collector 11. The relay pipe 42 connects the switching valve 40 and the blower 12. The relay pipe 43 connects the switching valve 40 and the silencer 13. In the suction vehicle 1, the relay pipe 46 connects the blower 12 and the silencer 13. In the exhaust pipe 45, an exhaust port 47 is formed at the end opposite to the end connected to the switching valve 40. The inside (internal space) of the exhaust pipe 45 opens to the outside of the hopper 10 at the exhaust port 47.

The switching valve 40 is connected to an operating lever 48. The operating state of the switching valve 40 is switched by an operator operating the operating lever 48. The switching valve 40 can be switched to a first operating state shown in FIG. 4 and FIG. 5, etc., and a second operating state shown in FIG. 6, etc. In the first operating state of the switching valve 40, the inside of the relay pipe 41 is connected to the inside of the relay pipe 42, and the inside of the relay pipe 43 is connected to the inside of the exhaust pipe 45. In the switching valve 40, the communication between the inside of the relay pipe 41 and the inside of the exhaust pipe 45 and the inside of the relay pipes 41 and 42 is blocked. Therefore, in the first operating state of the switching valve 40, the inside of the dust collector 11 is connected to the inside of the blower 12 via the inside of the relay pipe 41 and the inside of the relay pipe 42 in order. The inside of the silencer 13 is connected to the exhaust port 47 via the inside of the relay pipe 43 and the inside of the exhaust pipe 45 in that order.

On the other hand, in the second operating state of the switching valve 40, the inside of the relay pipe 41 communicates with the inside of the relay pipe 43, and the inside of the relay pipe 42 communicates with the inside of the exhaust pipe 45. Then, in the switching valve 40, communication between the inside of the relay pipes 41 and 43 and the inside of the relay pipe 42 and the inside of the exhaust pipe 45 is blocked. Therefore, in the second operating state of the switching valve 40, the inside of the dust collector 11 communicates with the inside of the silencer 13 via the inside of the relay pipe 41 and the inside of the relay pipe 43 in that order. And the inside of the blower 12 communicates with the exhaust port 47 via the inside of the relay pipe 42 and the inside of the exhaust pipe 45 in that order.

An operation panel 51 is also installed on the vehicle frame 3. The operation panel 51 is disposed between the cab 5 and the hopper 10 in the front-rear direction of the suction vehicle 1. An operation to drive the blower 12 and an operation to stop driving the blower 12 are inputted to the operation panel 51 by an operator or the like. When the blower 12 is driven, air flows are forcibly generated inside the recovery tank 15, inside the relay pipes 38, 41 to 43, inside the exhaust pipe 45, and the like. When the blower 12 is driven, air flows from the switching valve 40 through the inside of the relay pipe 42 to the blower 12, and air flows from the blower 12 through the inside of the relay pipe 46 to the silencer 13. Therefore, when the blower 12 is driven, an air flow is formed from the switching valve 40 through the blower 12 toward the silencer 13. Note that even when the blower 12 is driven, an air flow from the silencer 13 through the blower 12 toward the switching valve 40 is not formed.

In the first operating state of the switching valve 40, as described above, the dust collector 11 communicates with the blower 12 through the inside of the relay pipe 41 and the inside of the relay pipe 42 in that order. Therefore, by driving the blower 12 in the first operating state of the switching valve 40, air flows from the inside of the collection tank 15 toward the blower 12, passing through the inside of the relay pipe 38, the dust collector 11, the inside of the relay pipe 41, and the inside of the relay pipe 42 in that order.

On the other hand, in the second operating state of the switching valve 40, the dust collector 11 communicates with the blower 12 through the inside of the relay pipe 41, the inside of the relay pipe 43, the silencer 13, and the inside of the relay pipe 46, in that order. Therefore, by driving the blower 12 in the second operating state of the switching valve 40, air flows from the blower 12 to the inside of the collection tank 15, passing through the inside of the relay pipe 46, the silencer 13, the inside of the relay pipe 43, the inside of the relay pipe 41, the dust collector 11, and the inside of the relay pipe 38, in that order. Therefore, by switching the switching valve (flow switching valve) 40 between the first operating state and the second operating state while the blower 12 is in operation, the flow of air between the inside of the collection tank 15 and the blower 12 is switched. That is, while the blower 12 is in operation, the direction in which air flows between the inside of the collection tank 15 and the blower 12 is switched by switching the operating state of the switching valve 40.

The suction vehicle 1 performs the task of suctioning and collecting objects such as soil and sand. Figure 4 shows the state in which the objects are being suctioned and collected. As shown in Figure 4 and other figures, when sucking up objects, the on-off valve 23 of the suction pipe 21 is opened to connect the inside of the collection tank 15 to the suction port 22. In addition, the switching valve 31 in the connection pipe 26 is operated with the operating lever 32 to block communication between the inside of the collection tank 15 and the inside of the water tank 16 and the opening 27. At this time, the switching valve 31 is in a state in which the inside of the water tank 16 is connected to the opening 27 (arrow B1). Then, the switching valve 40 is set to the first operating state by operating the operating lever 48 or other means. As a result, the inside of the relay pipe 41 is connected to the inside of the relay pipe 42, and the inside of the relay pipe 43 is connected to the inside of the exhaust pipe 45 in the switching valve 40.

Then, with the on-off valve 23 and the switching valves 31 and 40 in the operating state described above, the blower 12 is driven by operating the operation panel 51, etc. This creates an air flow that passes through the inside of the recovery tank 15, the inside of the relay pipe 38, the dust collector 11, the inside of the relay pipe 41, the inside of the relay pipe 42, the blower 12, the inside of the relay pipe 46, the silencer 13, the inside of the relay pipe 43, and the inside of the exhaust pipe 45 in this order, from the suction port 22 to the exhaust port 47.

By forming the air flow as described above, the inside of the collection tank 15 is depressurized, for example by creating a vacuum state. Since the inside of the collection tank 15 is depressurized while the inside of the collection tank 15 is in communication with the suction port 22, the objects to be collected, such as soil and sand, are sucked through the suction port 22 of the suction pipe 21, and the objects to be collected flow into the inside of the collection tank 15. The objects to be collected that flow into the inside of the collection tank 15 are then piled up inside the collection tank 15. When the objects to be collected that have piled up inside the collection tank 15 are to be disposed of at a waste disposal site or the like, the hopper 10 is rotated relative to the running body frame 3, so that the hopper 10 is tilted relative to the running body frame 3 as described above. The door 18 is then opened, and the objects to be collected inside the collection tank 15 are disposed of.

In addition, when the air flow shown in FIG. 4 is formed as described above, air flows from inside the collection tank 15 through the inside of the relay pipe 38, the dust collector 11, and the inside of the relay pipe 41 in this order toward the blower 12. The dust collector 11 is disposed between the inside of the collection tank 15 and the blower 12 in the air flow path, and separates dust from the air flowing from the inside of the collection tank 15 toward the blower 12. The dust collector 11 then collects the dust and the like separated from the air. In this embodiment, the dust collector 11 is a cyclone dust collector, and separates dust and the like from the air by centrifugal separation, and collects the dust and the like. In addition, the dust collector 11 separates dust and the like that was not collected in the collection tank 15 from the air and collects it.

When the air flow shown in FIG. 4 is formed as described above, air flows from the blower 12 through the inside of the relay pipe 46, the silencer 13, the inside of the relay pipe 43, and the inside of the exhaust pipe 45, in that order, toward the exhaust port 47. The air is then exhausted to the outside (atmosphere) from the exhaust port 47 of the exhaust pipe 45. The silencer 13 separates moisture from the air that has flowed in through the blower 12. The silencer 13 also reduces noise generated by the exhaust of air from the exhaust port 47 described above.

The suction vehicle 1 may also spray water onto the object to be collected, such as soil and sand, and use the water pressure to break down the object before sucking and collecting it as described above. For this reason, the suction vehicle 1 supplies water to the inside of the water tank 16, which stores water inside the water tank 16 and ensures that there is enough water to spray onto the object. Figure 5 shows the state in which water is being supplied to the inside of the water tank 16.

5, when supplying water to the water tank 16, the on-off valve 36 of the water supply pipe 33 is opened to connect the inside of the water tank 16 to the water supply port 35. The on-off valve 23 of the suction pipe 21 is closed to block communication between the inside of the recovery tank 15 and the suction port 22. The switching valve 31 in the connection pipe 26 is operated with the operating lever 32 to connect the inside of the water tank 16 to the inside of the recovery tank 15 (arrow B2). At this time, the switching valve 31 is in a state where the communication of the opening 27 to the inside of the recovery tank 15 and the inside of the water tank 16 is blocked. Then, the switching valve 40 is set to the first operating state by operating the operating lever 48, etc. As a result, the inside of the relay pipe 41 is connected to the inside of the relay pipe 42, and the inside of the relay pipe 43 is connected to the inside of the exhaust pipe 45 in the switching valve 40.

Then, with the on-off valves 23, 36 and the switching valves 31, 40 in the operating state described above, the blower 12 is driven by operating the operation panel 51, etc. This creates an air flow that passes through the inside of the water tank 16, the inside of the connection pipe 26, the inside of the recovery tank 15, the inside of the relay pipe 38, the dust collector 11, the inside of the relay pipe 41, the inside of the relay pipe 42, the blower 12, the inside of the relay pipe 46, the silencer 13, the inside of the relay pipe 43, and the inside of the exhaust pipe 45 in this order, from the water supply port 35 to the exhaust port 47.

By forming the air flow as described above, even when water is being supplied to the inside of the water tank 16, the air inside the recovery tank 15 is exhausted from the exhaust port 47 through the inside of the relay pipe 38, the inside of the dust collector 11, the inside of the relay pipe 41, the inside of the relay pipe 42, the inside of the blower 12, the inside of the relay pipe 46, the silencer 13, the inside of the relay pipe 43, and the inside of the exhaust pipe 45, just as when the object to be recovered is being sucked and recovered. Therefore, even when water is being supplied to the inside of the water tank 16, the inside of the recovery tank 15 is reduced in pressure, for example by being put into a vacuum state.

In addition, when the air flow shown in FIG. 5 is formed as described above, the inside of the water tank 16 is also depressurized, for example by being put into a vacuum state. When the inside of the water tank 16 is depressurized together with the inside of the recovery tank 15, a suction force acts on the inside of the water tank 16 from the water supply port 35. Therefore, by positioning the water supply port 35 underwater when the inside of the water tank 16 is depressurized together with the inside of the recovery tank 15, water flows from the water supply port 35 into the inside of the water supply pipe 33, and the water flowing in from the water supply port 35 is supplied to the inside of the water tank 16.

As described above, in this embodiment, by setting the on-off valves 23, 36 and the switching valves 31, 40 to the operating states described above, water is supplied to the inside of the water tank 16 simply by driving the blower 12. The supply of water to the water tank 16 can be stopped by either closing the on-off valve 36 of the water supply pipe 33, opening the on-off valve of the suction pipe 21, or switching the operating state of the switching valve 31 to cut off communication between the inside of the collection tank 15 and the inside of the water tank 16.

Figure 6 shows the state in which water from the water tank 16 is being sprayed to the outside. As shown in Figure 6 and other figures, when spraying water from the water tank 16, the on-off valve 36 of the water supply pipe 33 is opened to connect the inside of the water tank 16 to the water supply port 35. Also, the on-off valve 23 of the suction pipe 21 is closed to block communication between the inside of the recovery tank 15 and the suction port 22. Also, the inside of the water tank 16 is connected to the inside of the recovery tank 15 by operating the switching valve 31 with the operating lever 32 in the connection pipe 26 (arrow B2). Then, the switching valve 40 is set to the second operating state by operating the operating lever 48, etc. As a result, in the switching valve 40, the inside of the relay pipe 41 is connected to the inside of the relay pipe 43, and the inside of the relay pipe 42 is connected to the inside of the exhaust pipe 45.

Then, with the on-off valves 23, 36 and the switching valves 31, 40 in the operating state described above, the blower 12 is driven by operating the operation panel 51, etc. This creates an air flow that passes through the inside of the exhaust pipe 45, the inside of the relay pipe 42, the blower 12, the inside of the relay pipe 46, the silencer 13, the inside of the relay pipe 43, the inside of the relay pipe 41, the dust collector 11, the inside of the relay pipe 38, the inside of the recovery tank 15, and the inside of the connecting pipe 26 in this order, from the exhaust port 47 toward the inside of the water tank 16.

When the air flow shown in FIG. 6 is formed as described above, the pressure of the air flowing from inside the connecting pipe 26 into the water tank 16 acts on the water stored inside the water tank 16. The pressure of the air causes the water in the water tank 16 to flow out of the water tank 16 through the water supply pipe 33. The water that flows out of the water tank 16 is then sprayed out of the hopper 10 from the water supply port 35 of the water supply pipe 33. As described above, in this embodiment, by setting the on-off valves 23, 36 and the switching valves 31, 40 to the operating state described above, the water inside the water tank 16 is sprayed out simply by driving the blower 12.

In this embodiment, when the blower 12 is driven, the inside of the recovery tank 15 and the inside of the water tank 16 are connected by the switching valve 31, so that it is possible to reduce the pressure inside the water tank 16 together with the inside of the recovery tank 15. Then, when the inside of the water tank 16 is reduced in pressure together with the inside of the recovery tank 15, water flowing in from the water supply port 35 can be supplied to the inside of the water tank 16. That is, in this embodiment, by setting the opening/closing valves 23, 36 and the switching valves 31, 40 to the operating state shown in FIG. 5, water is supplied to the inside of the water tank 16 simply by driving the blower 12.

Because water is supplied to the inside of the water tank 16 as described above, there is no need for the worker to climb to the vertically upper part of the hopper 10 to supply water to the inside of the water tank 16. This makes it easy and safe to supply water to the inside of the water tank 16. In addition, because water is supplied to the inside of the water tank 16 as described above, one worker can appropriately check the level gauge that indicates the amount of water stored in the water tank 16 while simultaneously supplying water to the water tank 16. This improves the efficiency of the work of supplying water to the water tank 16. Therefore, in the work of spraying water onto the collection target and sucking and collecting the collection target, the water to be sprayed onto the collection target can be easily and appropriately secured.

In addition, in this embodiment, the blower 12 used for suction recovery of the recovery target is also used to supply water to the inside of the water tank 16. In other words, there is no need to provide a water supply pump or the like for supplying water to the water tank 16 separately from the blower 12. This reduces the total weight of the equipment installed on the running body frame 3. In addition, there is no need to provide space on the running body frame 3 for a water supply pump or the like for supplying water to the water tank 16 separately from the space for the blower 12, improving the freedom of arrangement of equipment on the running body frame 3.

In addition, in this embodiment, by driving the blower 12 in the second operating state of the switching valve 40, water in the water tank 16 can be sprayed from the water supply port (spout) 35. This allows the water in the water tank 16 to be sprayed easily and safely, improving the efficiency of the work of spraying water from the water tank 16. In addition, in this embodiment, the blower 12 used for suction recovery of the recovery target is also used to spray water from the water tank 16. This eliminates the need to provide a pump or the like for spraying water from the water tank 16 separately from the blower 12, and appropriately reduces the total weight of the equipment installed on the running body frame 3.

(Modification)
In the above-mentioned embodiment, the water tank 16 is formed integrally with the recovery tank 15 in the hopper 10, but in a modified example, the water tank 16 may be separate from the recovery tank 15. In this case, for example, the water tank 16 is provided separate from the hopper 10. In this case, as in the above-mentioned embodiment, the on-off valves 23, 36 and the switching valves 31, 40 are provided. Then, by switching the operating states of the on-off valves 23, 36 and the switching valves 31, 40 in the same manner as in the above-mentioned embodiment, the pressure inside the water tank 16 can be reduced together with the inside of the recovery tank 15, and water can be supplied to the inside of the water tank 16. Also, by switching the operating states of the on-off valves 23, 36 and the switching valves 31, 40 in the same manner as in the above-mentioned embodiment, the water in the water tank 16 can be sprayed to the outside.

The present invention is not limited to the above-described embodiment, and various modifications can be made in the implementation stage without departing from the gist of the invention. In addition, the embodiments may be implemented in combination as appropriate as possible, in which case the combined effects can be obtained. Furthermore, the above-described embodiment includes inventions at various stages, and various inventions can be extracted by appropriate combinations of the multiple constituent elements disclosed.

1...suction vehicle, 2...traveling body, 3...traveling body frame, 10...hopper, 11...dust collector, 12...blower, 13...silencer, 15...recovery tank, 16...water tank, 21...suction pipe, 22...suction port, 23...on-off valve (first on-off valve), 26...connecting pipe, 31...switching valve (communication switching valve), 33...water supply pipe, 35...water supply port, 36...on-off valve (second on-off valve), 40...switching valve (flow switching valve), 45...exhaust pipe, 47...exhaust port.

Claims (4)

A collection tank in which the sucked collection target is accumulated;
a blower that can reduce the pressure inside the recovery tank by being driven;
A water tank capable of storing water;
a connecting pipe connecting the recovery tank and the water tank;
a communication switching valve provided in the connecting pipe for switching a communication state between the interior of the collection tank and the interior of the water tank, the communication switching valve being capable of reducing the pressure in the interior of the water tank together with the interior of the collection tank by communicating between the interior of the collection tank and the interior of the water tank when the blower is in operation;
a water supply pipe having a water supply port that opens to the outside and an end opposite to the water supply port that is connected to the water tank, the water supply pipe being capable of supplying water flowing in from the water supply port to the inside of the water tank when the inside of the water tank is depressurized together with the inside of the recovery tank;
A suction vehicle comprising: a suction pipe having a suction port that opens to the outside and that allows the collection target sucked from the suction port to flow into the inside of the collection tank when the inside of the collection tank is depressurized by driving the blower;
an on-off valve provided in the suction pipe for switching a communication state between the inside of the collection tank and the suction port;
Further comprising:
the communication switching valve communicates between the interior of the recovery tank and the interior of the water tank, and the on-off valve blocks communication between the interior of the recovery tank and the suction port. In this state, the blower is driven to reduce the pressure in the interior of the water tank together with the interior of the recovery tank.
The suction vehicle of claim 1. a flow switching valve for switching the flow of air between the inside of the recovery tank and the blower while the blower is in operation;
In a first operating state of the flow switching valve, a flow is generated from the inside of the collection tank toward the blower by driving the blower, and in a second operating state of the flow switching valve, a flow is generated from the blower toward the inside of the collection tank by driving the blower,
When the flow switching valve is switched to the first operating state and the communication switching valve is used to communicate between the interior of the recovery tank and the interior of the water tank, the blower is driven, thereby making it possible to reduce the pressure of the interior of the water tank together with the interior of the recovery tank.
3. A suction vehicle according to claim 1 or 2 . an exhaust pipe having an exhaust port that opens to the outside and capable of exhausting air that has passed through the blower from the inside of the recovery tank by driving the blower, from the exhaust port;
a dust collector disposed between the interior of the recovery tank and the blower, the dust collector separating dust from air flowing from the interior of the recovery tank toward the blower;
The suction vehicle of any one of claims 1 to 3, further comprising: