JPS6233749Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for recovering residual oil from within a tank.

When inspecting the tank or cleaning the tank, the inside of the tank is opened and the oil is drained from the oil drain port provided on the side wall of the tank, but be careful not to pull out the sludge or water at the bottom of the tank along with it. Since the oil outlet is located at a relatively high location, there is still a considerable amount of oil remaining at the bottom of the tank, along with sludge and water, even after oil is extracted.

Therefore, from the standpoint of resource conservation, it is necessary to remove as much of the residual oil as possible, but since sludge and water coexist, methods for removing the residual oil have been devised.

As one example, although not publicly known, a device as shown in FIG. 1 is used. This device is
The receiving plate 1 has legs 2 at the four corners, and the lower end of the suction pipe 3 is fixed to the upper surface of the central part of the receiving plate 1. Note that a plurality of notches are provided at the lower end of the suction pipe 3 to form a suction port 3a that opens onto the surface of the receiving plate 1, and a coupling ring 3b is provided at the upper end of the suction pipe 3.
It can be connected to the suction hose on the suction device (vacuum pump) side.

When in use, after draining the oil to a predetermined level from the oil drain port, place this device at the bottom of the tank through the manhole provided in the tank. At this time, since sludge, water, and residual oil accumulate in the order from below at the bottom of the tank, the receiving plate 1 is positioned near the boundary between water and residual oil. In addition, suction pipe 3
A suction hose connected to a suction device outside the tank is connected through the coupling ring 3b. When the suction device is operated in this state, residual oil in the tank is sucked into the suction port 3a of the suction pipe 3 from above the surface of the receiving plate 1, and is recovered through the suction hose.

However, with such devices, as the amount of residual oil decreases, air is sucked in along with the residual oil, which reduces suction efficiency and takes time to recover. This caused the water and sludge to be stirred up, mixing them together and causing them to be inhaled together. Moreover, if the residual oil was light gasoline, there was a risk of ignition if it mixed with air.

The present invention was made with the aim of providing a residual oil recovery device that overcomes these drawbacks. A recess is formed at the bottom of the support plate, and a suction pipe connectable to the suction hose of the suction device is provided facing the recess.

Examples will be described below with reference to FIGS. 2 and 3.

The edge of the receiving plate 11 is raised to form a weir 12. Further, legs 13 made of threaded rods are vertically passed through the four corners of the receiving plate 11, and these legs 13 are screwed into nuts 14 fixed to the upper surface of the receiving plate 11. Therefore, the height of the legs 13 is adjustable.

A recess 15 is formed in the center of the bottom of the receiving plate 11, and a suction pipe 16 is disposed in the recess 15 with a suction port 16a at the lower end thereof facing. The suction pipe 16 is supported via a plurality of support pieces 17 which are passed between the suction pipe 16 and the receiving plate 11, and a coupling ring 1 is attached to the upper end of the support piece 17.
6b, and can be connected to the suction hose 18 on the suction device side.

When in use, after draining the oil to a predetermined level from the oil drain port, place this device at the bottom of the tank through the manhole. A suction hose 18 on the suction device side is connected to the suction pipe 16 of this device through a coupling 16b. Or you can connect it after putting it in the bottom of the tank.

After that, the suction device is operated and the remaining oil is removed from the receiving plate 11.
It is guided into the recess 15 from above and extracted through the suction pipe 16 through the suction hose.

At the stage when it became impossible to suck the liquid due to the drop in the liquid level due to the removal of residual oil, someone entered through the manhole and
The height of the receiving plate 11 is adjusted to position the receiving plate 11 near the boundary layer between water and residual oil.

After this, the suction device is operated again to remove the residual oil, but at this time, the residual oil is filtered by the weir 12 at the edge of the receiving plate 11, and only the supernatant portion enters the receiving plate 11. , is stored in the central recess 15. The residual oil stored in the recess 15 is sucked in by the suction port 16a of the suction pipe 16 and recovered through the suction hose 18.

Therefore, only the residual oil from which sludge and water have been removed by the weir 12 is recovered, and the receiving plate 1
The remaining oil is collected in the recess 15 of 1, and the remaining oil is extracted from there through the suction pipe 16, so the amount of oil can be secured.
Since there is almost no risk of air being mixed in, extraction can be carried out efficiently and collection time can be shortened.

Note that the receiving plate 11 is preferably made of stainless steel.
This prevents the occurrence of rust, and also makes it easier to detect trace amounts of moisture, sludge, etc., using the reflected light from the stainless steel plate.

Further, the receiving plate 11 may be inclined so that the center portion thereof is the lowest, and a recessed portion may be formed in the center thereof.

As explained above, according to the present invention, since the weir is provided at the edge of the receiving plate, residual oil can be filtered and sludge and water can be removed more reliably. Since the oil is collected and the residual oil is sucked in by the suction pipe, a sufficient amount of oil can be secured and the residual oil can be quickly recovered without inhaling air. Therefore, not only can the collection time be shortened, but the sludge and water will not be stirred up, and the danger of ignition due to air being mixed in can be avoided.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional example, Fig. 2 is a plan view showing an embodiment of the present invention, and Fig. 3 is a -
FIG. 11...Socket plate, 12...Weir, 13...Legs, 15
... recess, 16 ... suction pipe, 16a ... suction port,
16b...Cup ring, 18...Suction hose.

Claims (1)

[Scope of utility model registration request] It is equipped with a receiving plate that has height-adjustable legs and whose edges are raised to form a weir, and a recessed portion is formed approximately in the center of the bottom of this receiving plate, and the suction device side faces the recessed portion. A tank residual oil recovery device characterized by having a suction pipe connectable to a suction hose.