JP2009195826A - Rotating drum type waste liquid centrifuge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotating drum type waste liquid centrifuge capable of preventing a waste liquid from coming through a drum rotary shaft from the bottom part of a rotating drum and flowing in the rotating operation mechanism side. <P>SOLUTION: In the rotating drum type waste liquid centrifuge 1, a liquid draining plate 17 is attached to the rear face 9 of the bottom plate 7 of a rotating drum 5. After the rotating drum 5 stops on completion of centrifugal separation, the remaining oil in the rotating drum 5 flows and dropped on the bottom plate 7 and flows out in the side of the rear face 9 through a waste liquid discharge hole 8. The flowing-out oil runs through the liquid draining plate 17 surrounding the waste liquid discharge hole 8, drops to a waste liquid recovery pan 12 in the lower side and recovered there. Accordingly, the following trouble can be prevented after stopping of the rotating drum 5: that is, the oil comes through the rear face 9 of the rotating drum 5, flows toward the center side, comes through the outer circumference 10a of the drum rotary shaft 10, and penetrates a rotating operation mechanism 11 under the waste liquid recovery pan 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  In the present invention, parts such as bolts and nuts to which waste liquid such as oil is attached are put into a rotating drum in a state where the parts are put in a mesh basket, and the waste liquid attached to the parts is centrifuged by rotating the rotary drum at a high speed. The present invention relates to a rotating drum type waste liquid centrifuge to be separated.

2. Description of the Related Art Conventionally, a rotary drum centrifuge for removing waste liquid such as oil adhering to various parts using centrifugal force is known. As shown in FIG. 5, a conventional rotary drum centrifuge 100 includes a mesh-shaped cylindrical car 101 into which oil or other components are placed, and a rotary drum 102 that can receive the cylindrical car 101 from the upper end opening. A drum rotating shaft 103 connected and fixed coaxially to the bottom of the rotating drum 102, a rotation driving mechanism 104 for rotating the drum rotating shaft 103, and a centrifugally separated outer peripheral portion of the bottom of the rotating drum 102. A waste liquid discharge hole 105 for dropping the collected waste liquid from the bottom of the rotary drum 102 and a waste liquid recovery pan 106 disposed below the rotary drum 102 for collecting the waste liquid falling from the waste liquid discharge hole 105 I have. In addition, the rotating drum type centrifugal separator is disclosed by patent documents 1-3.
JP 09-94484 A Japanese Utility Model Publication No. 03-22549 JP 50-142404 A

  During the centrifugal separation operation in which the rotary drum 102 rotates at a high speed, the waste liquid centrifuged from the components is blown to the outer peripheral side of the rotary drum 102. Therefore, oil that falls downward from the waste liquid discharge hole 105 of the rotating drum 102 does not travel toward the center along the back surface of the bottom of the rotating rotating drum 102. However, immediately after the rotating drum 102 stops, the waste liquid that has been centrifuged remains on the inner peripheral surface portion, the bottom outer peripheral edge portion, and the like. When such waste liquid flows downward from the waste liquid discharge hole 105, it may move inward along the back surface 102a of the rotary drum 102 as indicated by an arrow in FIG.

  A drum rotating shaft 103 is attached to the center of the back surface of the rotating drum 102, and the drum rotating shaft 103 penetrates through the center of a waste liquid collecting pan 106 disposed below the rotating drum 102 with play. A shaft hole 107 is formed. When the waste liquid moves to the center side along the back surface 102a of the rotating drum 102, it falls along the outer peripheral surface of the drum rotating shaft 103 attached thereto. Waste liquid that falls along the outer peripheral surface of the drum rotation shaft 103 flows down to the lower rotational drive mechanism 104 side without being collected by the waste liquid collection pan 106, and is discharged to the rotational drive mechanism 104 or the outer peripheral part thereof. Will accumulate and these parts will be contaminated with waste liquid. For example, if waste liquid adheres to the brake, V-belt, etc. of the rotation drive mechanism 104, the operation performance and durability of the drive device are reduced.

  In view of these points, an object of the present invention is to propose a rotary drum type waste liquid centrifuge capable of preventing waste liquid from flowing from the bottom of the rotary drum along the drum rotation shaft to the rotation drive mechanism side. It is in.

In order to solve the above problems, the rotary drum type waste liquid centrifuge of the present invention is:
A part input container for inserting a part with waste liquid such as oil formed from a porous material,
A vertically arranged rotating drum capable of receiving the component input cage from the upper end opening;
A waste liquid recovery pan disposed below the bottom of the rotary drum block,
A drum rotating shaft whose upper end is fixed in a coaxial state to the back surface of the sealed bottom portion of the rotating drum;
A waste liquid discharge hole for dropping the waste liquid in the rotary drum to the waste liquid recovery pan is formed in the outer peripheral edge portion of the sealed bottom portion of the rotary drum,
The waste liquid collection pan is formed with a shaft hole that penetrates the rotating drum with play and extends downward,
A liquid draining projection that protrudes downward from the back surface is formed in a portion between the waste liquid discharge hole and the shaft hole on the back surface of the sealed bottom portion of the rotating drum.

  In the rotary drum type waste liquid centrifuge of the present invention, a liquid draining projection is formed on the back surface of the sealed bottom portion of the rotary drum. After the centrifugal separation operation is finished and the rotation of the rotary drum is stopped, the waste liquid remaining in the rotary drum flows down to the bottom of the rotary drum, and is below the waste liquid discharge hole formed in the outer peripheral edge portion thereof. Flows out. Part of the waste liquid that has flowed downward from the waste liquid discharge hole travels along the back surface of the rotating drum and moves toward the center. The waste liquid heading toward the center side is dammed by a liquid draining protrusion arranged in the middle, and falls from there to a waste liquid recovery pan. Accordingly, it is possible to prevent the waste liquid from reaching the drum rotation shaft and entering the rotation driving mechanism below the waste liquid collection pan along the outer peripheral surface thereof.

  Here, it is preferable that the liquid cutting protrusion is formed so as to surround a central portion of the back surface and both circumferential portions of the waste liquid discharge hole. In this way, since the waste liquid that has flowed downward from the waste liquid discharge hole is prevented from flowing along the back surface of the rotating drum, the discharged waste liquid can be dropped from the waste liquid discharge hole to the waste liquid collection pan.

  The liquid draining projection may be a projection formed in an annular shape on the back surface of the sealed bottom portion of the rotating drum. In this way, the outer peripheral edge side where the waste liquid discharge hole is formed on the back surface of the rotating drum and the central side part where the shaft hole is formed are completely separated by the annular liquid cutting projection. Can be separated.

  Next, the waste liquid discharge holes are generally formed at a plurality of locations at predetermined angular intervals along the outer peripheral edge portion of the sealed bottom portion of the rotating drum.

  In the rotary drum type waste liquid centrifuge according to the present invention, since the liquid draining projection is formed on the back surface of the sealed bottom portion of the rotary drum, the waste liquid that travels along the back surface of the rotary drum toward the center side is blocked from there. It can be dropped in a collection pan and collected in a waste liquid collection pan. Accordingly, it is possible to prevent the adverse effect that the waste liquid enters the outer side of the rotary shaft of the drum rotation shaft and enters the rotation drive mechanism below the waste liquid collection pan.

  Embodiments of a rotary drum type waste liquid centrifuge to which the present invention is applied will be described below with reference to the drawings.

(overall structure)
FIG. 1 is a schematic configuration diagram showing a main part of a rotary drum type waste liquid centrifuge according to the present embodiment. The rotary drum type waste liquid centrifuge 1 includes a cylindrical separator housing 2, and an opening / closing lid 4 is attached to an upper end opening 3 of the separator housing 2. Inside the separator housing 2, a cylindrical rotating drum 5 is arranged coaxially. The rotary drum 5 has an opening 6 at the upper end, and the lower end is sealed by a disk-shaped bottom plate 7 (blocked bottom). In the outer peripheral edge portion of the bottom plate 7, waste liquid discharge holes 8 are formed at four locations at an angular interval of 90 degrees along the circumferential direction.

  The upper end portion of the drum rotating shaft 10 is connected and fixed coaxially to the back surface 9 of the bottom plate 7 of the rotating drum 5. The drum rotation shaft 10 extends vertically downward from the back surface 9, and its lower end extends to the rotation drive mechanism 11 disposed at the bottom of the separator housing 2. The rotation drive mechanism 11 includes a drive motor, a pulley for decelerating the rotation of the drive motor and transmitting it to the drum rotation shaft 10, a rotation transmission mechanism such as a V belt, and a brake mechanism for stopping the rotation of the drum rotation shaft 10. Etc. are installed.

  The bottom plate 7 of the rotary drum 5 and the lower rotary drive mechanism 11 are partitioned by a waste liquid recovery pan 12. The outer peripheral edge portion 13 of the waste liquid collecting pan 12 is fixed to the inner peripheral surface of the separator housing 2, and a shaft hole 14 through which the drum rotating shaft 10 passes with play is formed at the center. ing.

  Here, the rotating drum 5 receives from the opening 6 at the upper end thereof a cylindrical wire mesh cage 15 (component throwing cage) in which components W such as bolts and nuts to which waste liquid, for example, oil adheres, is put. Is possible. The wire cage 15 has a shape slightly smaller than the rotating drum 5 and has an opening 16 at the upper end, from which the part W is introduced.

  FIG. 2 is an explanatory view showing the back surface 9 of the bottom plate 7 of the rotary drum 5. In the bottom surface 7, waste liquid discharge holes 8 are formed at four locations at an angular interval of 90 degrees in the circumferential direction on the outer peripheral edge side. Each waste liquid discharge hole 8 has a large number of fine through holes. Further, on the back surface 9 of the bottom plate 7, a liquid draining plate 17 (liquid draining projection) is attached between each waste liquid discharge hole 8 and the central shaft hole 14. The liquid draining plate 17 of this example is formed of a metal plate bent in a U shape covering the portion 17a on the back surface center side and the portions 17b and 17c on both sides in the circumferential direction of the back surface in each waste liquid discharge hole 8. Each liquid draining plate 17 projects vertically downward from the back surface 9.

(Effect of liquid draining plate)
The operation of the rotating drum type waste liquid centrifuge 1 having this configuration will be described. As shown by the phantom line in FIG. 1, the wire cage 15 in which the parts W are put is put into the rotating drum 5 from the upper end opening 3 of the rotating drum type waste liquid centrifuge 1, and the opening / closing lid 4 is closed. Thereafter, the rotary drive mechanism 11 is driven to rotate the rotary drum 5 at a high speed. The wire mesh cage 15 rotates at a high speed together with the rotating drum 5, and the oil adhering to the component W charged therein is centrifuged and scattered to the outer peripheral side to adhere to the inner peripheral surface 5 a of the rotating drum 5. It flows down along the inner peripheral surface 5a. The oil that has flowed down to the bottom of the rotary drum 5 falls from the waste liquid discharge hole 17 formed in the outer peripheral edge portion of the bottom plate 7 to the lower side of the rotary drum 5 and is collected in the waste liquid collection pan 12 disposed below the oil. Is done.

  FIG. 3 is an explanatory view showing the flow of oil after the centrifugal separation operation is finished and the rotation of the rotary drum 5 is stopped. When the centrifugal operation is completed and the rotation of the rotary drum 5 is stopped, the residual oil adhering to the inner peripheral surface 5a of the rotary drum 5 flows down along the inner peripheral surface and is formed on the bottom plate 7 of the rotary drum 5. Flows out from the waste liquid discharge hole 8 to the back side. The oil that has flowed out to the back side flows downward along the vertical side surface 17 d of the liquid draining plate 17, and falls from the lower end of the liquid draining plate 17 to the waste liquid collecting pan 12. Therefore, after the rotating drum 5 is stopped, the oil flowing downward from the waste liquid discharge hole 8 flows to the center side and flows down along the outer peripheral surface 10a of the drum rotating shaft 10, so that the lower side of the waste liquid collecting pan 12 There is no entry into the rotation drive mechanism 11 side. Therefore, the rotational drive mechanism 11 or the bottom of the separator housing 2 in which the rotational drive mechanism 11 is disposed is covered with oil, which may cause deterioration of the operation of the components of the rotational drive mechanism 11 and a decrease in durability. No.

  The liquid draining plate 17 extends vertically downward from the back surface 9, but this direction may not be vertical. Moreover, the protrusion amount from the back surface of the liquid draining plate 17 can be suitably set according to each centrifuge.

(Other embodiments)
In the above example, the liquid draining plate 17 is used to surround each of the waste liquid discharge holes from three directions, but at least if the part between the waste liquid discharge hole 8 and the shaft hole 14 on the center side is arranged in a partitioned state. Good.

  Further, as shown in FIG. 4, an annular plate 17 </ b> A having a constant width may be attached to the back surface 9 as the liquid draining plate 17. Of course, a closed shape other than an annular shape, for example, a plate bent into a polygonal shape may be used. Further, it is possible to integrally form a liquid draining protrusion on the bottom plate 7 of the rotating drum 5.

  Of course, as shown in FIG. 4A, the number of waste liquid discharge holes 8 is not limited to the four places in the above example.

It is a schematic block diagram which shows the rotating drum type waste-liquid centrifuge to which this invention is applied. It is explanatory drawing which shows the back surface of the rotating drum of FIG. It is explanatory drawing which shows the effect of the liquid cutting board attached to the back surface of the rotating drum. It is explanatory drawing which shows another example of a liquid cutting board. It is explanatory drawing which shows the problem of the conventional rotary drum type waste-liquid centrifuge.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating drum type waste liquid centrifuge 2 Separator housing 3 Upper end opening part 4 Opening / closing lid 5 Rotating drum 5a Inner peripheral surface 6 Opening part 7 Bottom plate 8 Waste liquid discharge hole 9 Back surface 10 Drum rotating shaft 11 Rotation drive mechanism 12 Waste liquid collection pan 13 Outer peripheral edge portion 14 Shaft hole 15 Wire mesh cage 16 Opening portions 17 and 17A Liquid cutting plate W Parts

Claims (4)

A component charging basket (15) for storing a component (W) to which a waste liquid such as oil formed from a porous material is attached;
A rotating drum (5) capable of receiving the component charging cage (15) from the upper end opening (6);
A waste liquid recovery pan (12) disposed below the sealed bottom (7) of the rotating drum (5);
A drum rotating shaft (10) whose upper end is connected and fixed to the back surface (9) of the sealed bottom (7) of the rotating drum (5);
A waste liquid discharge hole (8) for dropping the waste liquid in the rotary drum (5) onto the waste liquid recovery pan (12) is formed in the outer peripheral edge portion of the sealed bottom (7) of the rotary drum (5). And
The waste liquid recovery pan (12) is formed with a shaft hole (14) that extends through the rotating drum (5) with play and extends downward,
A liquid projecting downward from the back surface (9) at a portion between the waste liquid discharge hole (8) and the shaft hole (14) on the back surface (9) of the sealed bottom (7) of the rotating drum (5). A rotary drum type waste liquid centrifuge (1) characterized in that a cutting projection (17, 17A) is formed. In the rotating drum type waste liquid centrifuge (1) according to claim 1,
The liquid draining projection (17) is formed so as to surround the central portion of the back surface (9) and the peripheral portions on the circumferential side in the waste liquid discharge hole (8). Drum-type waste liquid centrifuge (1). In the rotating drum type waste liquid centrifuge (1) according to claim 1,
The liquid draining projection is an annular projection (17A) formed on the back surface (9) of the sealed bottom (7) of the rotating drum (5). 1). In the rotary drum type waste liquid centrifuge (1) according to any one of claims 1 to 3,
The waste liquid discharge hole (8) is formed at a plurality of locations at predetermined angular intervals along the outer peripheral edge portion of the sealed bottom (7) of the rotary drum (5). Centrifuge (1).

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