JPS6040915B2 - Liquid level scooping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid level scooping device, and more specifically,
The present invention relates to a device for automatically scooping up only the surface portion of liquid in a liquid tank.

For example, when it is desired to remove oil that has entered a water tank, the conventional method is to insert a pump slightly into the oil tank formed by the oil that has risen to the surface of the water layer, and use an appropriate lifting pump to remove the oil. A method of pumping only the oil from the oil layer was being explored.

However, with this conventional method, when the thickness of the oil layer is very thin, the amount of water pumped out tends to be larger than the amount of oil pumped up, and the pipes used for pumping it up tend to be larger. It has been extremely difficult to maintain the position of the sump opening just below the surface of the oil layer. This is, for example,
In electrical discharge machining equipment, when you want to remove oil mixed into the water tank when machining is performed using water and oil alternately as machining fluid, or when you want to remove dust, foreign objects, etc. floating on the surface of the fluid. It becomes a problem. Therefore, an object of the present invention is to provide a liquid level scooping device that can efficiently and automatically scoop up the surface portion of the liquid.

According to the present invention, a float member that floats on a liquid in a liquid tank;
a guide means for guiding the float member in a vertically movable manner; a liquid receiving box provided with an opening and floating on the liquid; a means for rotatably and freely locking the liquid receiving box on the float member in a vertically movable manner; , an adjustment mechanism provided between the liquid receiving box and the float member for rotating the liquid receiving box in accordance with a lifting stroke due to a change in the weight of the liquid receiving box; The liquid receiving box is rotated so that the lower lip of the checkpoint moves below and above the surface of the liquid a distance longer than the lifting stroke as the liquid receiving box moves up and down due to changes in weight. A liquid level scooping device is provided.

With this liquid level scooping device, when the liquid receiving box is empty and the weight of the liquid receiving box is relatively light, the liquid receiving box rises and the lower lip is positioned slightly below the surface of the liquid. The liquid on the surface of the liquid flows past the lower lip and flows from the closed opening, and as the weight of the liquid receiving box increases, the lip position rises a distance greater than the descending distance of the liquid receiving box. do.
Therefore, when a predetermined amount of liquid accumulates in the liquid receiving box, the drop rises above the liquid surface and stops the liquid scooping operation. Therefore, if the liquid in the liquid receiving box is discharged by an appropriate means, the above-mentioned scooping operation can be performed again, and only the surface portion of the liquid can be always scooped out. Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments. In Figure 1,
An embodiment of the present invention is shown in which the liquid draining machine according to the present invention is applied as an oil removal device for a machining fluid tank for an electrical discharge machining device.

The machining fluid tank contains water used as machining fluid for the electrical discharge machine, and the water used in the electrical discharge machine (not shown) is recovered by the water pipe 2. In this electric discharge machine, water and oil are alternately used as machining fluid, so that the water collected by the water pipe 2 contains some oil. Reference numeral 3 indicates a pipe for taking out water from which oil has been removed. In the machining fluid tank 1, the oil mixed in the water supplied from the water pipe 2 is suspended as an oil layer at the top of the water surface due to the difference in specific gravity. In order to scoop up the oil in the oil layer floating on the water surface, an oil scooping bag 4 according to the present invention is provided in the processing liquid tank 1. The oil pumping device 4 is guided by two guide rods 5, 5 erected from the bottom of the processing liquid tank 1, and is freely connected to these guide rods 5, 5 so as to be movable up and down. It has two floats 6, 6 floating on water in the machining fluid tank 1. These floats 6, 6 are
The elongated holes 9, 9 in the vertical direction, which are connected to each other by the connecting plates 7, 7 and formed in the opposing surfaces 8, 8 of the floats 6, 6, include
The end of one horizontal shaft 10 is slidably and rotatably inserted into the shaft, and a hollow oil sump box 11 having a drainage gate 12 is fixed to the horizontal shaft 1. There is. In order to adjust the attitude of this opening 12 so that the position of the lower lip 13 of the closing opening 12 is always in contact with the liquid surface, an adjustment mechanism 14 is provided between the floats 6, 6 and the oil sump box 11. There is. Here, the adjustment mechanism 14 includes racks 16, 16 attached to the surfaces 8, 8 of the floats 6, 6, respectively, and a pinioso 17, attached to each end of the horizontal shaft 10 and meshed with the racks 16, 16, respectively. 17, an oil sump box 11
It is a motion change≠inner mechanism that can rotate the oil sump box 11 by vertical movement with respect to the float.
Next, the operation of this oil pumping device 4 will be explained with reference to FIGS. 1 and 2. The two floats 6, 6 floating on the water in the machining fluid tank 1 are connected together by the connecting plate 7, so when the amount of water in the machining fluid tank 1 increases or decreases, these two floats 6, 6 They move up and down along the guide rods 5, 5 as one.

At this time, the elongated holes 9, 9 and the horizontal shaft 1 are connected between both floats 6, 6.
The oil sump box 11 held by the oil sump box 11 is formed in advance so that the lip 13 of the entrance 12 is in contact with the oil layer on the liquid surface. flows into. As a result, the oil floating on the water surface is pumped out. When oil flows into the oil sump box 11, the weight of the inflow oil gradually increases, causing the oil sump box 1
gradually sinks into the water, and as a result, both ends of the horizontal shaft 10 to which the oil sump box 11 is attached move downward along the elongated holes 9, 9 of the floats 6, 6. When the horizontal shaft 10 moves downward, the pinions 17, 17 at each end of the shaft 10 and the respective racks 16, 16 of the floats 6, 6 are adjacent to each other.
The oil sump 11 rotates around its central axis, and the direction of rotation is determined so that the lip 13 moves upward when the oil sump box 11 is lowered. Therefore, when oil accumulates in the oil sump box 11 and sinks into the water, the oil sump box 11 rotates in response, and the lip 13 automatically moves upwards to place the oil in the oil sump box 11. When a certain amount of oil accumulates, the drip 13 comes out above the liquid level and the oil pumping operation stops. On the other hand, when the oil in the oil sump box 11 is drained to the outside via a discharge pipe 18 connected to a pump (not shown) and one end of which extends to near the bottom of the oil sump box 11, the oil sump box 11
1 becomes lighter, so it gradually floats upwards in the water.

At this time, the oil sump box 11 gradually rotates together with the shaft 10 in the opposite direction to the sinking case described above. As a result, oil sump box 1
The lower lip 13 of Sekiguchi 12 of No. 1 continues to be in contact with the oil layer again, so that the oil in the oil layer floating on the water surface continues to flow into the oil sump box 11, and oil is removed from the water surface. It turns out. In the above configuration, the vertical movement distance of the lip 13 with respect to the vertical movement distance of the oil sump box 11 is the distance a from the middle point D of the ball 10 to the engagement point X between the rack 16 and the pinion 17, and the distance a from the point X. Distance to lip 13 b
(see FIG. 2), and by appropriately setting the a/b ratio, the automatic scooping operation can be performed as described above. In this way, the level of the lip 13 rises and falls with respect to the oil layer surface level according to the amount of oil in the oil sump box 11, and the oil sump box 11 can constantly scoop up oil from the liquid surface.

As is clear from the above explanation, even if the amount of machining fluid in the machining fluid tank 1 changes and the water surface position changes, as long as a layer of oil is floating on the water surface, the oil suction device 4 Oil can be continuously removed from the water surface by automatically adjusting the position of the oil-sucking gate 11.

In the above embodiment, the device according to the present invention is used to scoop oil from an oil layer on the surface of water, but the present invention is not limited to this application, and can be used to scoop any surface portion of liquid. For example, it can be applied in the same way to remove scale and other pollutants floating on the water surface.

According to the present invention, as described above, even if there is a fluctuation in the liquid level, the liquid on the surface of the liquid can be automatically and reliably scooped out. Automatically removes oil or floating matter on the surface of various liquids.
And it can be removed continuously and very effectively. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of the liquid level scooping device according to the present invention, and FIG. 2 is an enlarged sectional view of the main parts of the device taken along line 1-1 shown in FIG. 1. It is.

1... Processing liquid tank, 4... Oil pumping device, 5... Guide camphor, 6... Float, 9
...Elongated hole, 10...Horizontal axis, 11...
... Oil sump box, 12 ... Sekiguchi, 13 ...
・Lip, 14...Adjustment mechanism, 16...
・Hook, 17"" pinion.

Figure 1 Figure 2

Claims (1)

[Claims] 1. A float member that floats on a liquid in a liquid tank, a guide means that guides the float member so as to be able to rise and fall, a liquid receiving box that is provided with an opening and that floats on the liquid, and that is capable of freely rotating the liquid receiving box. a means for locking to the float member so as to be movable up and down, and a means provided between the liquid receiving box and the float member for rotating the liquid receiving box in response to a lifting stroke caused by a change in the weight of the liquid receiving box. and an adjustment mechanism, in which the lower lip of the opening is moved below or above the liquid level by a distance longer than the lifting stroke in response to the lifting movement caused by the weight change of the liquid receiving box. A liquid level collecting device characterized in that the liquid receiving box is rotated so as to be moved.