JPH08103766A - Surface layer liquid discharge apparatus - Google Patents

Abstract

PURPOSE: To provide the apparatus capable of efficiently introducing a surface layer liquid into a liquid sump from the entire periphery of the upper edge of a weir plate. CONSTITUTION: One end part of a flexible member 22 such as a bellows cylinder is fixed to the outer peripheral part of the substrate 1 provided in a liquid and the other end part thereof is fixed to the outer periphery of the weir plate 20 provided to the outer periphery of a float main body 4 and a liquid sump 5 is formed in the state surrounded by the substrate 1, the flexible member 2 and the float main body 4. The float main body 4 floats and sinks corresponding to the liquid amt. in the liquid sump 5 and, at the time of sinking, a surface layer liquid flows in the liquid sump 5 from the entire periphery of the upper edge of the weir plate 20 and the inflow ratio of a liquid other than the surface layer liquid to the liquid sump 5 is reduced and the surface layer liquid can be efficiently discharged to the outside from the liquid sump 5 by a liquid discharge pipe 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface liquid for removing a liquid such as a cutting liquid by discharging the surface liquid containing a machine oil or the like floated by a difference in specific gravity to the surface of a liquid such as a cutting liquid. It relates to an ejector.

[0002]

2. Description of the Related Art Conventionally, as a surface liquid discharging device as described above, for example, as shown in Japanese Patent Publication No. 61-59994, it can slide vertically on the upper inner peripheral surface of an outer box fixed in a liquid tank. In some cases, a lower portion of the float fixed to this damper plate is supported in the outer box, and a discharge pipe is opened at the bottom of the outer box.

In this surface layer liquid discharge device, when the amount of liquid in the liquid reservoir in the outer box is small, the buoyancy acting on the float is small, so the dam plate sinks below the liquid surface of the liquid in the liquid tank, The surface layer liquid flows into the liquid reservoir from the upper edge of the dam plate, and the surface layer liquid that has flowed in is discharged to the outside of the liquid tank from the discharge pipe by driving a pump or the like. At this time, by making the amount of liquid flowing from the upper edge of the weir plate into the liquid reservoir in the outer box larger than the amount of liquid discharged from the discharge pipe, the amount of liquid stored in the liquid reservoir gradually increases, and The liquid level inside becomes high.
For this reason, the buoyancy acting on the float increases, and the float floats, and the weir plate projects above the liquid inlet of the outer box and the liquid surface of the liquid, so that the discharge of the surface liquid in the liquid tank is interrupted.

[0004] In this state, if the surface liquid is continuously discharged from the discharge pipe, the amount of liquid stored in the liquid reservoir is reduced, and the dam plate sinks together with the float, and the surface liquid flows again from the upper end thereof. Will be Then, the surface layer liquid is discharged by repeating the above-described operation.

[0005]

However, in the above-mentioned conventional surface liquid discharging apparatus, the lower edge of the fluid inlet such as a notch formed in the side wall facing the weir plate of the outer box is always positioned below the liquid level. The liquid leaks from the liquid inlet into the liquid reservoir through the space between the outer box and the weir plate, and the amount of liquid leakage is large, the float floats up and the surface liquid flows into the liquid reservoir. However, there is a problem that the surface liquid cannot be efficiently discharged because the leaked liquid contains a large amount of liquid that is not desired to be discharged other than the surface liquid.

The present invention solves the above-mentioned problems, prevents the liquid other than the surface layer liquid from leaking into the liquid reservoir, and allows the liquid from the entire upper edge of the dam plate surrounding the outer peripheral side of the float body to be stored in the liquid reservoir. It is an object of the present invention to provide a surface layer liquid discharging device which can efficiently put the surface layer liquid into the liquid reservoir and discharge the surface layer liquid to the outside efficiently, and which can increase the amount of the liquid with a relatively simple structure.

[0007]

A surface layer liquid discharging device according to a first aspect of the present invention comprises a base body disposed in a liquid, and a bellows tube or a partition plate having one end fixed to the outer peripheral portion of the base body. From a flexible member, a float having the other end of the flexible member fixed to a dam plate, and a liquid inlet formed in the inside surrounded by the base body, the flexible member and the float and provided in the float. The float is equipped with a liquid reservoir for inflowing a liquid surface liquid and a liquid discharge pipe which is opened in the liquid reservoir and is fixed to the substrate to discharge the surface liquid in the liquid reservoir to the outside of the liquid. Place the outer circumference of the float body, which is a hollow body that blocks the inflow of liquid downward, above the liquid surface of the liquid.
The float is surrounded by a weir plate that moves by floating and sinking, and the float main body and the weir plate are fixed by forming a fluid inlet between them.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention. In FIGS. 1 and 2, reference numeral 1 denotes a disk-shaped base body, and a lower end portion of an expandable flexible member 2 made of a bellows tube such as a synthetic resin or a metal plate is fixed to the upper surface of the outer peripheral portion of the base body 1. The flexible member 2 has a large-diameter portion 2a formed vertically or in multiple stages or in a spiral shape, and a multistage ring or coil spring 3 is engaged and supported on the inner peripheral surface of the large-diameter portion 2a.

An upper end portion of the flexible member 2 is fixed to an outer peripheral portion of a float 4 which will be described later, and the float 4 is arranged above the base body 1, and the float 4 and the base body 1 allow the upper and lower rings or The upper and lower ends of the spring 3 are supported, and a liquid reservoir 5 is formed inside the base 1, the flexible member 2 and the float 4.

In the float 4, an upper end portion of an inner peripheral wall 7 is fixed to an inner peripheral portion of a horizontal upper wall 6, and an inner peripheral portion of a lower wall 8 is fixed to a lower end portion of the inner peripheral wall 7 to form an upper wall 6 and The float main body 10 is provided with a hollow body in the shape of a double cylinder in which the upper end and the lower end of the outer peripheral wall 18 are fixed to the outer peripheral portion of the lower wall 8.

Further, supporting members 19 are radially projected on the outer peripheral side of the outer peripheral wall 18, and an annular dam plate 20 is supported and fixed to the outer ends of the supporting members 19 so as to be separated from the float body 10.
A liquid inlet 21 is formed between these, the mounting ring 12 is fixed to the outer peripheral surface of the dam plate 20, and the inner peripheral wall 7 of the float body 10 is fixed.
The liquid discharge pipe 13 is loosely inserted in the center hole 22 formed on the center side, the lower end of the liquid discharge pipe 13 is fixed to the central upper surface of the base 1, and the lower end of the liquid carry-out pipe 13 is opened in the liquid reservoir 5. The discharge ports 14 are formed at a plurality of positions in the circumferential direction.
The upper end of the liquid discharge pipe 13 protruding above the float 4 is
While supporting and fixing to the liquid tank 15 by an appropriate means,
It is connected to the suction side of a pump (not shown). Although not shown, an oil-liquid separation tank is connected to the discharge side of the pump.

Further, the upper wall 6 of the float body 10 is always located on the liquid surface 16a, and the upper edge of the dam plate 20 is the upper wall 6 described above.
The flexible member 2 is arranged below the liquid surface 16a so as to be movable above and below, and the attachment ring 12 is a flexible member 2 formed of a bellows tube.
The upper end of is fixed. Then, the substrate 1 is suspended and fixed at a required height position of the liquid tank 15 by the liquid discharge pipe 13, and the upper edge of the dam plate 20 is floated and settled by the liquid tank 1 to float.
It is arranged at a height position where it moves above and below the liquid surface 16a of the liquid 16 contained in the liquid 5.

Next, the operation of one embodiment of the above-mentioned structure will be described for the case where the machine oil floating on the surface layer of the cutting fluid of the machine tool is removed. In a state where there is little liquid inside the liquid reservoir 5 surrounded by the base body 1, the flexible member 2 and the float 4, the buoyancy acting on the float body 10 of the float 4 is small, so the float 4 descends due to gravity, The upper edge of the barrier plate 20 is the liquid surface 16 of the liquid 16 in the liquid tank 15.
It is located slightly below a. Therefore, the surface layer liquid containing a large amount of mechanical oil mixed with the cutting liquid, which is the liquid 16 in the liquid tank 15, and floated over the upper edge of the barrier plate 20 from the entire circumference thereof through the liquid inlet 21 to the liquid reservoir 5 Pour into.

The surface liquid which has flowed into the liquid reservoir 5 is sucked up from the discharge port 14 provided at the lower end of the liquid discharge pipe 13 by the drive of the pump (not shown) and sent to the liquid separation tank (not shown). Machine oil is separated from cutting fluid in a separation tank. Therefore, the machine oil is collected by an appropriate means, and the cutting oil is returned to the liquid tank 15 for use.

The amount of liquid flowing into the liquid reservoir 5 beyond the barrier plate 20 is made larger than the amount of liquid discharged from the liquid discharge pipe 13, so that the amount of liquid stored in the liquid reservoir 5 gradually increases. However, the liquid level in the liquid reservoir 5 becomes high. Therefore, the buoyancy acting on the float body 10 increases, the flexible member 2 is extended, the float 4 floats, and the liquid surface 16a.
The upper edge of the weir plate 20 rises above and the inflow of the surface layer liquid into the liquid reservoir 5 is interrupted.

In this state, if the surface liquid is continuously discharged from the liquid discharge pipe 13 by driving the pump, the amount of the surface liquid stored in the liquid reservoir 5 decreases, and the float 4 shortens the flexible member 2. Then, it sinks and the upper edge of the barrier plate 20 descends slightly below the liquid surface 16a, so that the surface layer liquid flows into the liquid reservoir 5 again.

The surface layer liquid is discharged by repeating the above-described operation, and the entire upper edge of the barrier plate 20 moves above and below the liquid surface 16a each time the float 4 sinks, so that only the surface layer liquid is discharged. It can flow into the liquid reservoir 5. Further, liquid-tightly adheres to the lower end and the upper end of the flexible member 2 formed of a bellows tube on the outer peripheral portions of the base 1 and the float 4, respectively, and the inside of the liquid tank is cut into the liquid reservoir 5 from these fixed parts. The liquid does not leak. Therefore, the mixing ratio of the cutting fluid to the machine oil of the liquid flowing into the liquid reservoir 5 can be reduced, and the surface layer liquid containing much machine oil can be efficiently discharged from the liquid tank.

In this embodiment, the liquid discharge pipe may be penetrated through the substrate and the upper end of the liquid discharge pipe may be opened in the liquid reservoir. In this case, the float 4 is formed from a hollow body having no inner peripheral wall. It may be configured as follows.

In the present invention, the ring or the coil spring attached to the flexible member composed of the bellows tube may be omitted, and the stopper for setting the floatation and subsidence positions of the float is a fixing member such as a liquid tank or a substrate. However, the stopper may be omitted.

In the present invention, since the height of the float in the embodiment is substantially the minimum liquid level, the flexible member formed of the bellows tube has a thickness of the material corresponding to this height. Depending on the difference between the inner diameter and the outer diameter, the height dimension should be 3
It can be easily increased to about 5 times, and it is possible to cope with a larger vertical fluctuation of the liquid surface. In the present invention, the pump for discharging the surface layer liquid in the liquid reservoir from the liquid discharge pipe is provided with a flow rate control valve in the liquid discharge pipe by changing the rotation speed of the pump. It becomes possible to adjust the discharge amount of the surface layer liquid.

In the above-mentioned embodiment, the discharge device for the machine oil floating above the cutting fluid of the machine tool has been described. However, the present invention discharges and removes oil such as waste oil and crude oil flowing out to seawater, especially the cause of pollution. It can be widely applied to the discharge of surface liquid.

[0022]

As described above, the surface layer liquid discharge device according to claim 1 of the present invention comprises a substrate disposed in the liquid,
A flexible member formed of a bellows tube or a partition plate having one end fixed to the outer peripheral portion of the base, a float having the other end of the flexible member fixed to a dam plate, the base, the flexible member, and A liquid reservoir which is formed inside the float and which allows a liquid surface liquid to flow from a liquid inlet provided in the float, and a liquid reservoir which is opened in the liquid reservoir and is fixed to the base body so that the surface liquid in the liquid reservoir is With a liquid discharge pipe for discharging to the outside of the liquid,
The float is constructed such that the outer circumference of a float body, which is a hollow body that blocks the inflow of liquid from the upper end to the lower side, is surrounded by a weir plate that moves above and below the liquid level of the float by floating and sinking. Since the fluid barrier and the barrier plate are fixed by forming a fluid inlet between them, the following effects can be obtained.

That is, in the surface layer liquid discharging device according to claim 1 of the present invention, the float floats and sinks due to the large or small amount of liquid in the liquid reservoir surrounded by the base body, the flexible member and the float. Each subsidence moves below the liquid surface of the liquid such as in the liquid tank surrounding the outer circumference of the float, the surface layer liquid flows into the liquid reservoir through the liquid inlet, and the liquid in the liquid reservoir is discharged by the liquid discharge pipe. Discharge to the outside of the liquid such as outside the tank.

Since the lower end portion and the upper end portion of the flexible member are fixed to the outer peripheral portions of the base body and the float, respectively, these fixing portions are made liquid-tight to prevent liquid other than the surface layer liquid from leaking into the liquid reservoir. The surface liquid can be surely prevented, and moreover, the surface liquid may efficiently flow into the liquid reservoir through the liquid inlet from the entire upper edge of the weir plate surrounding the outer peripheral side of the float body. It is possible to reduce the proportion of liquids other than those mentioned above, and to shorten the time during which the float floats and the inflow of the surface layer liquid into the liquid reservoir is interrupted, and the surface layer liquid can be efficiently discharged to the outside.

Further, since the weir plate is provided on the outer peripheral side of the float main body made of a hollow body, and the other end of the flexible portion such as a bellows tube having one end fixed to the outer peripheral portion of the base is fixed to the weir plate, comparison is made. The liquid reservoir can be enlarged with a simple structure.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a surface layer liquid discharging device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line BB of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Flexible member 4 Float 5 Liquid reservoir 6 Upper wall 7 Inner peripheral wall 8 Lower wall 10 Float body 12 Mounting ring 13 Liquid discharge pipe 14 Discharge port 15 Liquid tank 16 Liquid 16a Liquid surface 18 Outer peripheral wall 19 Support material 20 Weir Plate 21 Liquid inlet

Claims (1)

[Claims] 1. A flexible member composed of a base body disposed in a liquid, a bellows tube or a partition plate having one end fixed to an outer peripheral portion of the base body, and another end portion of the flexible member being a dam plate. A fixed float, a liquid reservoir formed inside the base, the flexible member and the float, and into which a surface liquid of the liquid flows from a liquid inlet provided in the float, and an opening in the liquid reservoir. A liquid discharge pipe fixed to the base body to discharge the surface layer liquid in the liquid reservoir to the outside of the liquid, wherein the float is an outer peripheral side of a float body made of a hollow body which prevents the liquid from flowing downward from the upper end. Is surrounded by a weir plate that moves above and below the liquid surface due to floatation and subsidence of the float, and the float body and the weir plate are fixed by forming a fluid inlet between them. Surface liquid discharge device.