JP2008302342A - Cyclone oil separator and sludge recovery vehicle equipped with this separator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cyclone oil separator making it possible to efficiently separate the oil content from a fluid containing the oil content and the gas content and to store the separated oil content within it. <P>SOLUTION: The cyclone oil separator 15 is provided with a cylindrical cyclone body 20 having a tapered part 22 and an inlet 25 on the upper end of the peripheral wall 21 of the cyclone body 20. The tapered part 22 of the cyclone body 20 is covered by an oil storage part 30, forming an outlet 26 on the upper face of the cyclone body 20. A fluid containing the coil content and the gas content is introduced from the inlet 25. The oil content that is centrifuged by the swirl of the fluid is stored in the oil storage part 30 and the fluid from which the oil content has been removed by centrifugation is discharged from the outlet 26. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cyclonic oil separator that is supplied with a fluid containing an oil component and a gas component and performs gas-liquid separation, and a sludge recovery vehicle including the same.

  2. Description of the Related Art Conventionally, a cyclonic oil separator that recovers an oil component from a fluid containing an oil component and a gas component using a swirling flow generated in the cyclone is known.

For example, Patent Document 1 has a cylindrical cyclone through which blow-by gas flows in and out, and introduces blow-by gas from the introduction port formed at the upper end of the peripheral wall in the direction along the circumferential direction to the inner peripheral surface of the peripheral wall. The oil contained in the blow-by gas is centrifuged by the swirling flow of the blow-by gas, recovered from the recovery port formed at the lower end of the cyclone, and the blow-by gas separated from the oil is placed in the center of the ceiling that covers the upper end of the peripheral wall. A cyclonic oil separator that is led out from the formed outlet is disclosed.
JP-A-11-42444

  By the way, in the cyclone type oil separator provided in the downstream of the vacuum pump used for sludge collection vehicles etc., it is necessary to supply the recovered oil to the vacuum pump and lubricate the vacuum pump.

  However, in the cyclonic oil separator of Patent Document 1, the tip of the cyclone is tapered and the recovery port is opened, and the recovered oil cannot be stored sufficiently. For this reason, there is a problem that the oil must be collected from the collection port at the tip of the cyclone, and the oil must be stored in another place and supplied to the vacuum pump.

  This invention is made | formed in view of this point, The place made into the objective is to isolate | separate an oil component from the fluid containing an oil component and a gas component efficiently, and to store the isolate | separated oil component inside. Is to be able to.

  In order to achieve the above object, in the present invention, the tip of the cyclone is covered with an oil reservoir.

  Specifically, the first invention presupposes a cyclonic oil separator that is supplied with a fluid containing an oil component and a gas component to perform gas-liquid separation.

And the cyclonic oil separator is
A cylindrical cyclone body having a tapered portion with an open tip;
An opening that is opened on the upper end side of the peripheral wall of the cyclone body, and into which the fluid flows,
An oil reservoir that covers the tapered portion and is centrifuged by the swirling flow of the fluid that has flowed in from the inlet, and that stores oil that falls from the tip of the tapered portion;
And a discharge port formed on the upper surface of the cyclone main body through which the fluid obtained by centrifuging the oil is discharged.

  According to said structure, the fluid containing the oil component and gas component which flowed in from the inlet port swirls the surrounding wall of a cyclone main body, and an oil component is centrifuged by the swirl flow. The oil component becomes oil droplets, moves downward along the peripheral wall, moves to the tip of the tapered portion, falls, and is stored in the oil storage portion. The fluid from which the oil has been centrifuged rises and is discharged from the outlet.

In the second invention, in the first invention,
A shielding plate is suspended from the tip of the tapered portion with a predetermined distance in the axial direction of the tapered portion.

  According to the above configuration, the swirling flow generated on the peripheral wall of the cyclone body collides with the shielding plate and is discharged from the outlet. At that time, oil adheres to the shielding plate and reliably falls to the oil reservoir. In addition, since there is a shielding plate, the oil once stored is not rolled up again.

In the third invention, in the second invention,
The said shielding board shall be a disk-shaped thing which has an outer diameter a little smaller than opening of the front-end | tip of the said taper part.

  According to said structure, the shielding board which is easy to manufacture with a simple structure is obtained.

In the fourth invention, in the third invention,
A plurality of bar-shaped members extend downward from the tip of the tapered portion with a predetermined interval in the circumferential direction.

  According to said structure, the oil droplet collected at the front-end | tip of a taper part further advances below along a some rod-shaped member, and is reliably guide | induced to an oil storage part.

In a fifth invention, in any one of the first to fourth inventions,
Provided downstream of the vacuum pump,
The oil collected in the oil reservoir is configured to be supplied to the vacuum pump.

  According to the above configuration, the oil component that lubricates the vacuum pump and mixes with the fluid discharged from the vacuum pump is reliably recovered in the oil reservoir by the cyclone oil separator of the present invention. There is little, and exhaust is clean.

In the sixth invention, the sludge recovery vehicle is
A cyclonic oil separator according to any one of the first to fourth inventions;
A vacuum pump provided upstream of the cyclonic oil separator and supplied with oil recovered by the oil reservoir.

  According to the above configuration, it is not necessary to frequently supply oil for lubricating the vacuum pump, and the exhaust is clean.

  As described above, according to the first aspect, the fluid containing the oil and gas flowing in from the introduction port is swirled to centrifuge the oil, and the oil is stored in the oil reservoir from the tip of the tapered portion. By dropping and storing the droplets, the oil component can be efficiently separated from the fluid containing the oil component and the gas component, and the separated oil component can be stored inside.

  According to the second aspect of the present invention, the swirl flow is collided with the shielding plate, and the oil component adhering to the shielding plate is dropped as oil droplets, so that the oil component is more efficiently separated and stored inside. In addition, the oil once stored can be prevented from being rolled up again.

  According to the third aspect of the invention, the shielding plate that efficiently stores the oil component can be manufactured at a low cost.

  According to the fourth aspect of the invention, the oil droplets collected at the tip of the tapered portion are dropped downward along the rod-shaped member, so that the oil component can be recovered more efficiently.

  According to the fifth aspect of the present invention, the oil that is mixed with the fluid discharged from the vacuum pump by lubricating the vacuum pump is reliably recovered in the oil reservoir, so that the vacuum pump can be prevented from malfunctioning due to insufficient oil. Can be prevented.

  According to the sixth aspect of the invention, a cyclone type oil separator having a high oil recovery rate is provided downstream of the vacuum pump, so that a sludge recovery vehicle with clean exhaust gas can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 2 shows a sludge recovery vehicle 1 according to an embodiment of the present invention. In this sludge recovery vehicle 1, a tank 3 for recovering sludge is placed on a vehicle body 2 equipped with an engine (not shown). For example, the tank 3 can be raised and lowered around a rotation shaft (not shown) at the rear of the vehicle body 2 by extending and retracting a raising and lowering cylinder (not shown). Thus, the sludge collected in the tank 3 can be discharged by raising the tank 3 with the tailgate 4 opened.

  The sludge collection vehicle 1 includes two vacuum pumps 5 driven by an engine (only one of them is shown in FIG. 2). As shown in FIGS. 3 and 4, these vacuum pumps 5 are connected to the respective ports of the four-way switching valve 7 through check valves 6. One of the remaining ports of the four-way switching valve 7 is connected to the silencer 8, and the remaining one is connected to the air separator 9. The four-way switching valve 7 can be switched by switching a lever (not shown) when the tank 3 is evacuated (shown in FIG. 3), pressurized (shown in FIG. 4), and neutral. Yes.

  The tank 3 is connected to the upstream side of the air separator 9 via an overflow prevention safety valve 10. A suction hose 11 for sucking sludge is connected to the upper end of the tank 3, and a rear cock 12 is provided in the rear tailgate 4. Moreover, the upper water discharge port 13 (only shown in FIG. 2) for discharging the dirty water in the tank 3 is provided on the upper side.

  A cyclonic oil separator 15 is connected downstream of each vacuum pump 5 via a simple sub oil separator 14. The oil recovered by the cyclonic oil separator 15 is supplied to the vacuum pump 5 via the oil strainer 16.

  As shown in FIG. 1, the cyclonic oil separator 15 includes a cylindrical cyclone main body 20 at the upper end. The cyclone main body 20 includes a cylindrical peripheral wall 21 on the upper end side and a tapered portion 22 that is connected to the lower end of the peripheral wall 21. As shown in FIGS. 6 and 7, an annular tip 22a is connected to the tip of the tapered portion 22, and a tip opening 22b is formed at the lower end of the tip 22a.

  As shown in FIGS. 1 and 5, an inlet 25 through which exhaust fluid from the vacuum pump flows is opened at the upper end of the peripheral wall 21 of the cyclone body 20. The direction of the inlet 25 is set so that a swirling flow is generated in the cyclone body 20. On the upper surface of the cyclone main body 20, an outlet 26 is formed through which a fluid obtained by centrifuging the oil is discharged. A partition wall 27 made of a cylinder having an outer diameter slightly smaller than the front end opening 22b is provided below the outlet port 26 so as to surround the outlet port 26.

  The tapered portion 22 is covered with a bottomed cylindrical oil reservoir 30. The oil reservoir 30 is configured to store an oil component that is centrifuged from the fluid by the swirling flow of the fluid flowing in from the inlet 25 and falls from the tip 22 a of the tapered portion 22. Specifically, the oil reservoir 30 is continuous with the peripheral wall 21, extends downward from the peripheral wall 21, has a first cylindrical portion 32 having a first flange 31 at the lower end, and the first flange 31 at the upper end. A second cylindrical portion 34 having a second flange 33 to be joined and having a lower end opened, and a lid portion 35 covering the lower end of the second cylindrical portion 34 are provided. The first cylindrical portion 32 and the second cylindrical portion 34 are fastened by inserting bolts 36 through the first flange 31 and the second flange 33. The lid portion 35 is suspended by a threaded rod 37 suspended from a bracket 34 a provided in the second cylindrical portion 34, and is fixed with an O-ring 45 sandwiched between the lower ends of the second cylindrical portion 34 by tightening the handle 38. Has been. The lid 35 is formed with a drain 39 for discharging the oil in the oil reservoir 30.

  A window 40 is formed at the upper and lower intermediate positions of the second cylindrical portion 34 so that the amount of oil inside can be seen. An oil replenishing port 41 for replenishing oil is formed at a position slightly above the removal window 40. The oil replenishing port 41 is usually covered with a cap 41a.

  An oil supply port 42 for supplying the oil stored in the oil reservoir 30 to the vacuum pump 5 is opened at the lower end side of the second cylindrical portion 34. Above the removal window 40, an oil introduction port 43 into which the oil recovered by the sub oil separator 14 is introduced is opened.

  As shown in FIG. 5, an attachment member 46 is provided on the back side of the cyclonic oil separator 15. The cyclone type oil separator 15 is attached to the vehicle body 2 by the attachment member 46.

  As shown in FIGS. 6 and 7, a disc-shaped shielding plate 50 having an outer diameter slightly smaller than the tip opening 22 b is provided at the tip end portion 22 a of the taper portion 22 below the taper portion 22 in the axial direction. It is suspended with a distance of. The shielding plate 50 is formed by bending an extension portion extending from the diameter direction of the disk upward to form an attachment portion 50a, and the attachment portion 50a is welded to the outer periphery of the tip portion 22a.

  A total of six rod-like members 51 extend downward at equal intervals in the circumferential direction at a portion where the outer peripheral attachment portion 50a of the tip portion 22a of the tapered portion 22 is not welded. The rod-shaped member 51 is made of round steel and is welded to the outer periphery of the distal end portion 22a.

-Operation-
Next, the operation of the sludge recovery vehicle 1 according to this embodiment will be described.

  For example, as shown in FIG. 2, sewage and sludge generated when the sewage pipe 60 is washed with a high-pressure washing car are accumulated below the manhole 61 of the sewage pipe 60. The sludge collection vehicle 1 is used to collect such sludge.

  First, in order to collect sludge, the inside of the tank 3 needs to be evacuated. Therefore, the lever of the four-way switching valve 7 is switched from the neutral position to the vacuum position. Then, as shown by the solid line arrow in FIG. 3, the fluid flows and the inside of the tank 3 can be evacuated. Therefore, by opening a valve (not shown) of the suction hose 11, sludge and the like can be sucked into the tank 3.

  That is, the pressure in the pipe upstream of the vacuum pump 5 is lowered by the vacuum pump 5, and the gas fluid in the tank 3 flows into the air separator 9. Here, dust is collected. Further, the fluid that has passed through the four-way switching valve 7 flows into the vacuum pump 5 through the check valve 6.

  Since the vacuum pump 5 is operated by being lubricated by the oil supplied from the cyclonic oil separator 15, the exhaust fluid contains an oil component and a gas component.

  This fluid first flows into the sub-oil separator 14, and the oil component that collides with the partition wall 14 a becomes oil droplets, is collected at the lower part, and is introduced into the oil reservoir 30 from the oil introduction port 43 of the cyclonic oil separator 15.

  Further, the fluid containing the oil and gas flowing in from the inlet 25 of the cyclonic oil separator 15 swirls around the peripheral wall 21 and the taper portion 22 of the cyclone body 20, and the oil is centrifuged by the swirling flow. . The oil component becomes oil droplets, moves downward along the peripheral wall 21 and the tapered portion 22, and moves to the tip portion 22 a of the tapered portion 22. The oil droplets collected at the tip portion 22 a of the taper portion 22 further proceed downward along the rod-like member 51.

  On the other hand, the swirling flow generated on the peripheral wall 21 of the cyclone main body 20 collides with the shielding plate 50 and is discharged from the outlet 26. At that time, the oil component adheres to the shielding plate 50, and the oil component also adheres to the rod-shaped member 51. The oil droplets adhering to the shielding plate 50 and the oil droplets collected at the tip of the rod-shaped member 51 are surely dropped into the oil storage unit 30 without being swung up by the rising airflow.

  The fluid in which the oil component is reliably centrifuged rises and is discharged from the outlet 26, passes through the four-way switching valve 7 again, and is discharged into the atmosphere from the silencer 8 connected to the four-way switching valve 7. . Exhaust gas does not pollute the atmosphere because the oil is sufficiently separated.

  On the other hand, as shown in FIG. 4, when the lever of the four-way switching valve 7 is switched from the neutral position to the pressurization position, the inside of the tank 3 is pressurized by the gas fluid that has passed through the air separator 9, and the sludge from the rear cock 12. Etc. are discharged under pressure.

-Effect of the embodiment-
Therefore, according to the cyclonic oil separator 15 according to the present embodiment, the fluid containing the oil and gas flowing in from the inlet 25 is swirled to centrifuge the oil, and the oil from the tip 22a of the tapered portion 22 Since the oil droplets are dropped and stored in the storage unit 30, the oil component can be efficiently separated from the fluid containing the oil component and the gas component, and the separated oil component is stored inside. Can do.

  According to the above embodiment, the swirl flow is collided with the shielding plate 50, and the oil component adhering to the shielding plate 50 is dropped as oil droplets, so that the oil component is more efficiently separated and stored inside. In addition, the oil once stored can be prevented from being rolled up again.

  According to the said embodiment, the shielding board 50 which stores an oil component efficiently can be manufactured at low cost.

  According to the above embodiment, the oil droplets collected at the tip 22 a of the tapered portion 22 are dropped downward along the rod-like member 51, whereby the oil component can be collected more efficiently.

  According to the above embodiment, the oil component mixed with the fluid discharged from the vacuum pump 5 by lubricating the vacuum pump 5 is reliably recovered in the oil reservoir 30, so that Failure can be prevented.

  According to the embodiment described above, the cyclone type oil separator 15 having a good oil recovery rate is provided downstream of the vacuum pump 5 of the sludge recovery vehicle 1, whereby the sludge recovery vehicle 1 with clean exhaust gas is obtained.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the said embodiment, although the cyclone type oil separator 15 was provided in the sludge collection vehicle 1, it is not limited to such a sludge collection vehicle 1. FIG. In short, the present invention can be applied to any cyclonic oil separator 15 provided on the downstream side of the vacuum pump 5 that requires oil supply.

  In the said embodiment, although the rod-shaped member 51 was comprised with the round steel, it may be comprised with a square steel, a wire, etc., and may be anything if it is a rod-shaped thing.

  In the above embodiment, the sub oil separator 14 is provided. However, even if not necessarily provided, the cyclone oil separator 15 alone can sufficiently recover the oil component.

  In the said embodiment, although the shielding board 50 was a disk-shaped thing, other shapes, such as a polygon, may be sufficient. In short, it is sufficient if the swirl flow collides to such an extent that the ascending swirl flow is not disturbed.

  In the said embodiment, although the oil storage part 30 was made into the bottomed cylindrical thing, if the bottomed cylindrical shape, the shape will not be limited. Moreover, although the oil storage part 30 was made into the shape provided with the 1st and 2nd cylindrical parts 32 and 34, the cylindrical part does not need to be divided | segmented.

  In the above embodiment, two vacuum pumps 5 are provided, but only one may be provided.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

  As described above, the present invention is useful for a cyclone oil separator provided on the downstream side of a vacuum pump that requires lubrication, such as a vacuum pump used in a sludge recovery vehicle.

It is a side view of the cyclone type oil separator concerning this embodiment. It is a side view of the sludge collection vehicle provided with the cyclone type oil separator. It is an air piping figure which shows the flow of the air at the time of the vacuum of a sludge collection vehicle. It is an air piping figure which shows the flow of the air at the time of pressurization of a sludge collection vehicle. It is a top view of a cyclone type oil separator. It is a side view which shows a taper part and a shielding board. It is a bottom view which shows the front-end | tip part and shielding board of a taper part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 5 Vacuum pump 15 Cyclone-type oil separator 20 Cyclone main body 21 Peripheral wall 22 Tapered part 22a Tip part 22b Tip opening 25 Introduction port 26 Outlet port 30 Oil storage part 50 Shielding plate 51 Rod-shaped member

Claims (6)

In a cyclone type oil separator in which a fluid containing oil and gas is supplied and gas-liquid separation is performed,
A cylindrical cyclone body having a tapered portion with an open tip;
An opening that is opened on the upper end side of the peripheral wall of the cyclone body and into which the fluid flows,
An oil storage part that covers the taper part and is centrifuged by a swirling flow of the fluid flowing in from the inlet, and stores an oil component falling from the tip of the taper part;
A cyclonic oil separator, comprising: a discharge port formed on an upper surface of the cyclone main body, through which a fluid obtained by centrifuging the oil is discharged. In the cyclonic oil separator according to claim 1,
A cyclonic oil separator, characterized in that a shield plate is suspended from the tip of the taper part at a predetermined distance in the axial direction of the taper part. In the cyclonic oil separator according to claim 2,
The cyclone type oil separator according to claim 1, wherein the shielding plate is made of a disc-like one having an outer diameter slightly smaller than the opening at the tip of the tapered portion. In the cyclonic oil separator according to claim 3,
A cyclonic oil separator, wherein a plurality of rod-like members extend downward at a predetermined interval in the circumferential direction at the tip of the tapered portion. In the cyclonic oil separator according to any one of claims 1 to 4,
Provided downstream of the vacuum pump,
A cyclonic oil separator, wherein the oil collected in the oil reservoir is supplied to the vacuum pump. A cyclonic oil separator according to any one of claims 1 to 4,
A sludge recovery vehicle comprising a vacuum pump provided upstream of the cyclone oil separator and supplied with oil recovered in the oil reservoir.

Images