JP2010168750A - Absorbing device and suction vehicle equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbing device capable of reusing oil collected into an oil pan and to provide a suction vehicle equipped with the same. <P>SOLUTION: This absorbing device includes a suction pump 5 for sucking air from the inside of a tank 3 for collecting wastewater or sludge to reduce pressure in the tank 3, an oil separator 8 connected with a discharge side of the suction pump 5 to separate oil from the air sucked into the suction pump 5 and collect it into an oil sump part 8a, an air exhaust pipe 10 for exhausting the air separated by the oil separator 8, the oil pan 11 provided in an outlet of the air exhaust pipe 10, an oil supply pipe 13a for supplying the oil collected in the oil sump part 8a into the suction pump 5, and an oil return pipe 12a for returning the oil collected in the oil pan 11 into the oil sump part 8a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a suction device for sucking and collecting waste water such as factory waste liquid, agricultural waste liquid and human waste from a storage tank, and sludge into a tank, and a suction vehicle equipped with the suction apparatus.

  2. Description of the Related Art A suction vehicle that sucks and collects waste water such as factory waste liquid, agricultural waste liquid, and human waste and sludge from a storage tank is known. For example, in the suction wheel of Patent Document 1, air in a tank is sucked and decompressed by a suction pump, and sludge and the like are sucked into the decompressed tank by a hose. Moreover, in this suction wheel, the inside of the tank can be pressurized by switching the air system of the suction pump by the switching valve, and sludge and the like can be discharged by pressurizing the inside of the tank.

  In addition, a vane pump is used for this kind of suction pump, and oil is required for the drive. Accordingly, since oil is mixed in the air on the discharge side of the suction pump, an oil separator is provided on the discharge side of the suction pump. Thereby, the oil in the discharged air is separated and removed, and the air is released to the atmosphere through the atmosphere release pipe. On the other hand, the oil collected by the oil separator is repeatedly supplied to the suction pump through the strainer and reused.

JP 2008-138485 A

  By the way, the air from which the oil has been separated and removed by the oil separator contains some oil that cannot be separated by the oil separator. Therefore, an oil pan is provided at the outlet of the atmosphere release pipe so as to receive the oil that could not be separated by the oil separator. When the oil in the oil pan has accumulated to some extent, it is extracted from the drain and discarded.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a suction device that makes it possible to reuse oil recovered by an oil pan and a suction wheel equipped with the suction device.

  The suction device of the present invention is connected to a suction pump for sucking air from a tank for collecting waste water or sludge and depressurizing the inside of the tank, and an air sucked by the suction pump. An oil separator that separates oil from the oil and collects it in an oil reservoir, an exhaust pipe for exhausting the air separated by the oil separator, an oil pan provided at the outlet of the exhaust pipe, and an oil reservoir It includes an oil supply pipe for supplying the recovered oil to the suction pump and an oil return pipe for returning the oil recovered by the oil pan to the oil reservoir.

  According to the suction device of the present invention, when some oil is contained in the air from which the oil has been separated and removed by the oil separator, the oil is recovered by the oil pan provided at the outlet of the exhaust pipe. The oil is returned from the pan to the oil reservoir through the oil return pipe. The oil returned to the oil reservoir is supplied to the suction pump through the oil supply pipe and reused together with the oil separated and collected by the oil separator.

  Here, in the suction device of the present invention, it is desirable that the oil pan is disposed at a position higher than the oil surface of the oil reservoir, and a switching valve is provided in the middle of the oil return pipe. As a result, by opening the switching valve in the middle of the oil return pipe, the oil flows naturally from the oil pan to the oil reservoir through the oil return pipe due to the difference in height between the oil reservoir and the oil pan, and the oil in the oil pan is oiled. It can be returned to the reservoir.

  Or the suction device of this invention can also be set as the structure provided with the non-return valve in the middle of oil return piping. Thereby, it is possible to prevent the oil from flowing back from the oil reservoir to the oil pan through the oil return pipe. Further, the check valve opens when the oil reservoir side is at a lower pressure than the oil pan side, and oil can be drawn from the oil pan to the oil reservoir through the oil return pipe.

  The suction wheel according to the present invention includes a tank for collecting waste water or sludge and the suction device. According to the suction vehicle of the present invention, it can travel to a collection place for waste water such as factory waste liquid, agricultural waste liquid and human waste, and sludge, and the waste water and the like can be sucked and collected from the storage tank to the tank. At this time, the oil used by the suction pump is recovered and reused by the oil separator and the oil pan.

(1) A suction pump that sucks air from the tank that collects wastewater or sludge and depressurizes the tank, and is connected to the discharge side of this suction pump, separating the oil from the air sucked by this suction pump The oil separator to be collected in the oil reservoir, the exhaust pipe for exhausting the air separated by the oil separator, the oil pan provided at the outlet of the exhaust pipe, and the oil collected in the oil reservoir The oil returned to the oil reservoir by the oil supply pipe that supplies the oil to the suction pump and the oil return pipe that returns the oil recovered by the oil pan to the oil reservoir, together with the oil separated and recovered by the oil separator, It is supplied to the suction pump through the oil supply pipe and reused. This makes it possible to effectively use oil that is wasted and to reduce running costs.

(2) The oil pan is disposed at a position higher than the oil surface of the oil reservoir, and the switch is provided in the middle of the oil return pipe, so that the oil reservoir is opened by opening the switch valve in the middle of the oil return pipe. The oil flows naturally from the oil pan to the oil reservoir through the oil return pipe due to the difference in height between the oil pan and the oil pan, and returns to the oil reservoir, so the power when returning oil from the oil pan to the oil reservoir is It becomes unnecessary.

(3) Due to the structure provided with a check valve in the middle of the oil return pipe, the check valve opens when the oil reservoir side is at a lower pressure than the oil pan side, and from the oil pan to the oil reservoir through the oil return pipe Since the oil can be drawn in, the oil collected by the oil pan can be automatically returned to the oil reservoir.

It is a top view of a suction wheel provided with a suction device in an embodiment of the invention. It is a side view of the suction wheel of FIG. It is a rear view of the suction wheel of FIG. It is an air piping figure of the suction wheel of FIG. It is a longitudinal cross-sectional view which shows the detail of the oil pan of the suction device of FIG.

  As shown in FIGS. 1 to 3, the suction wheel 1 in the embodiment of the present invention includes a tank 3 for collecting waste water or sludge on a chassis 2 and a tank 3 for sucking waste water or sludge into the tank 3. 3 and a suction device 4 for sucking air from inside. The tank 3 has an airtight structure. In the suction device 4, by switching the four-way valve 9 as will be described later, it is possible to pressurize the inside of the tank 3 and discharge the stored matter in the tank 3.

  As shown in FIG. 4, the suction device 4 includes a suction pump 5, a check valve 6, a sub oil separator 7, an oil separator 8, a four-way valve 9, an exhaust pipe 10, an oil pan 11, a switching valve 12, a strainer 13, an air The separator 14, overflow prevention safety valve 15, float-type full stop valve 16, safety valve 17, and the like are included. The overflow prevention safety valve 15 is provided in the middle of the air pipe 15a. The float-type full stop valve 16 is provided in the upper part of the tank 3.

  The suction pump 5 is a vane pump. By sucking air from the sealed tank 3 and reducing the pressure, the waste water such as factory effluent, agricultural effluent, and human urine from the storage tank and sludge are stored in the tank 3 through the suction hose 18. It is intended for suction and storage. The suction pump 5 is driven by an engine connected via a drive shaft and PTO (Power Take Off). The check valve 6 is provided on the suction side of the suction pump 5.

  The oil separator 8 is connected to the discharge side of the suction pump 5, but a sub oil separator 7 is provided between the oil separator 8 and the suction pump 5. The oil contained in the air sucked by the suction pump 5 is separated by the sub oil separator 7 and the oil separator 8 and collected in the oil reservoir 8a. The oil reservoir 8a is connected to the oil supply port of the suction pump 5 by an oil supply pipe 13a. The strainer 13 is provided in the middle of the oil supply pipe 13a. In the illustrated example, the oil reservoir 8a is formed integrally with the oil separator 8, but may be a separate body.

  The four-way valve 9 has a first port 9a, a second port 9b, a third port 9c, and a fourth port 9d. When the switching handle 9e is on the pressure side, the first port 9a and the second port 9b communicate with each other. The third port 9c and the fourth port 9d communicate with each other. On the other hand, when the switching handle 9e is on the vacuum side, the third port 9c and the first port 9a communicate with each other, and the fourth port 9d and the second port 9b communicate with each other. When the switching handle 9e is on the neutral side, the fourth port 9d and the first port 9a communicate with each other, and the third port 9c and the second port 9b communicate with each other.

  The first port 9 a of the four-way valve 9 is connected to the exhaust pipe 10. The second port 9 b is connected to the suction side of the suction pump 5 via the check valve 6. The third port 9 c is connected to the air discharge side of the oil separator 8. The fourth port 9d is connected to the overflow prevention safety valve 15 via the air separator 14. The safety valve 17 is provided in the middle of the pipe connecting the air separator 14 and the fourth port 9 d of the four-way valve 9.

  The exhaust pipe 10 is a pipe for exhausting the air separated by the oil separator 8. As shown in FIG. 2, the exhaust pipe 10 is disposed obliquely downward from above the four-way valve 9. The oil pan 11 is provided at the lower end exit of the exhaust pipe 10. The oil pan 11 is connected to an oil return pipe 12 a that returns the recovered oil to the oil reservoir 8 a of the oil separator 8. The switching valve 12 is provided in the middle of the oil return pipe 12a.

  As shown in FIG. 5, the oil pan 11 includes a cup portion 20 that stores oil and a cover portion 21 that covers an upper portion of the cup portion 20. The cup part 20 is provided with a pipe connection part 22 to which the oil return pipe 12a is connected and a drain valve 23 for extracting oil from the cup part 20. On the other hand, the cover portion 21 includes a silencer portion 24 connected to the exhaust pipe 10, an inner cylinder portion 25 that covers the periphery of the plurality of openings 24 a of the silencer portion 24, and a punching disposed at a lower portion of the inner cylinder portion 25. A plate 26 is provided. The oil pan 11 is disposed at a position higher than the oil surface of the oil reservoir 8a.

  The air discharged through the exhaust pipe 10 is silenced by passing through the plurality of openings 24a of the silencer portion 24, and is discharged into the cup portion 20 through the plurality of openings 26a of the punching plate 26 below the inner cylinder portion 25. The Here, the oil contained in the air that cannot be separated by the oil separator 8 is collected in the cup part 20, and the air passes through the gap between the cup part 20 and the inner cylinder part 25 and the gap between the cup part 20 and the cover part 21. It is designed to be discharged outside.

  In the suction device 4 having the above-described configuration, when waste water or sewage is sucked into the tank 3, the switching handle 9 e is set to the vacuum side and the suction pump 5 is driven. Thereby, the air in the tank 3 is sucked by the suction pump 5 through the air separator 14, the fourth port 9 d and the second port 9 b of the four-way valve 9, and the check valve 6, and the sub oil separator 7, oil separator 8 Then, the gas is discharged from the first port 9a of the four-way valve 9 through the exhaust pipe 10 through the third port 9c of the four-way valve 9. Thereby, the inside of the tank 3 is depressurized, and waste water, sludge and the like can be sucked into the tank 3 and collected by the suction hose 18.

  At this time, oil is supplied from the oil separator 8 to the suction pump 5 via the strainer 13. The oil supplied to the suction pump 5 through the strainer 13 is separated from the air by the sub oil separator 7 and the oil separator 8. Here, when some oil is contained in the air from which the oil has been separated and removed, the oil is recovered by the oil pan 11 provided at the lower end outlet of the exhaust pipe 10.

  The oil collected in the oil pan 11 naturally opens from the oil pan 11 to the oil reservoir 8a due to the difference in height between the oil pan 11 and the oil reservoir 8a by opening the switching valve 12 when the operation of the suction device 4 is stopped. It flows down and is returned to the oil reservoir 8a. Accordingly, no power is required to return the oil from the oil pan 11 to the oil reservoir 8a.

  The oil returned to the oil reservoir 8a is supplied to the suction pump 5 through the oil supply pipe 13a together with the oil separated and recovered by the sub oil separator 7 and the oil separator 8, and is repeatedly reused. Therefore, in this suction device 4, it is possible to effectively use the oil that has been collected by the oil pan 11 and wasted wastefully, and the running cost can be suppressed.

  On the other hand, when the waste water or sludge in the tank 3 is discharged from the discharge port 19, the switching handle 9e is set to the pressurizing side and the suction pump 5 is driven. Thereby, air in the atmosphere is sucked by the suction pump 5 through the first port 9a and the second port 9b of the four-way valve 9 and the check valve 6, and the sub-oil separator 7, the oil separator 8 and the four-way valve 9 It is sent out into the tank 3 through the third port 9c, the fourth port 9d, and the air separator 14. Thereby, the inside of the tank 3 is pressurized, and waste water, sludge, etc. in the tank 3 can be discharged from the discharge port 19.

  Even in this case, the suction pump 5 is supplied with oil from the oil separator 8 via the strainer 13. Accordingly, the oil supplied to the suction pump 5 via the strainer 13 is separated from the air by the oil separator 8 and is repeatedly supplied to the suction pump 5 via the strainer 13 and reused, as in the case of suction. Similarly, the oil recovered by the oil pan 11 is returned from the oil pan 11 to the oil reservoir 8a through the oil return pipe 12a and reused.

  In the suction device 4 in the present embodiment, the oil pan 11 is disposed at a position higher than the oil surface of the oil reservoir 8a, and the switching valve 12 is provided in the middle of the oil return pipe 12a. When the pan 11 is not disposed at a position higher than the oil surface of the oil reservoir 8a, a configuration including a check valve in place of the switching valve 12 is also possible. The check valve prevents oil from flowing back from the oil reservoir 8a to the oil pan 11 through the oil return pipe 12a.

  In this case, the switching valve 12 is opened when the oil reservoir 8a side is at a lower pressure than the oil pan 11 side, and oil can be drawn from the oil pan 11 to the oil reservoir 8a through the oil return pipe 12a. That is, the oil recovered by the oil pan 11 can be automatically returned to the oil reservoir 8a.

  Further, in the suction vehicle 1 equipped with the suction device 4 having the above-described configuration, it travels to a collection place for waste water such as factory waste liquid, agricultural waste liquid and human waste, and sludge, and the waste water is sucked into the tank 3 from the storage tank. Can be recovered.

  The suction device of the present invention and the suction wheel equipped with the suction device are useful as a device for sucking and collecting waste water and sludge such as factory waste liquid, agricultural waste liquid and human waste from a storage tank into a tank.

1 Suction Wheel 2 Chassis 3 Tank 4 Suction Device 5 Suction Pump 6 Check Valve 7 Sub Oil Separator 8 Oil Separator 9 Four Way Valve 10 Exhaust Pipe 11 Oil Pan 12 Switch Valve 12a Oil Return Pipe 13 Strainer 13a Oil Supply Pipe 14 Air Separator 15 Overflow prevention safety valve 16 Float type full stop valve 17 Safety valve 18 Suction hose 19 Discharge port 20 Cup part 21 Cover part 22 Pipe connection part 23 Drain valve 24 Silencer part 25 Inner cylinder part 26 Punching plate

Claims (4)

A suction pump for sucking air from the tank that collects wastewater or sludge and decompressing the tank;
An oil separator connected to the discharge side of the suction pump, separating oil from the air sucked by the suction pump, and collecting it in an oil reservoir;
An exhaust pipe for exhausting air separated by the oil separator;
An oil pan provided at the outlet of the exhaust pipe;
An oil supply pipe for supplying the oil collected to the oil reservoir to the suction pump;
A suction device including an oil return pipe for returning the oil collected by the oil pan to the oil reservoir.   The suction device according to claim 1, wherein the oil pan is disposed at a position higher than an oil surface of the oil reservoir, and a switching valve is provided in the middle of the oil return pipe.   The suction device according to claim 1, further comprising a check valve in the middle of the oil return pipe. A tank for collecting waste water or sludge;
A suction wheel comprising the suction device according to claim 1.

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