JPH08117743A - Apparatus for automatically recovering floating oil - Google Patents

Abstract

PURPOSE: To provide an apparatus for automatically recovering floating oil which has compact constitution, is prevented from sucking foreign matters, and can be used for a long period of time. CONSTITUTION: A net cover 1 with the lower surface opened is placed, a suction tube 4 the lower half of which extends downward from the opening of the lower surface is installed in the middle of the upper surface of the cover 1, a suction port 8 which is led to the lower half of the suction tube 4 is formed, and a bellows tank 5 which is composed of a base 6, a freely expandable/ shrinkable bellows cylinder 9 installed on the base 6, and a float 11 which has an oil inflow port 12 in the middle and is fixed to the upper part of the bellows cylinder 9 is installed. In addition, the suction tube 4 is inserted into the oil inflow port 12, and the lower end of the tube is fixed to the base 6 in order to attach the bellows tank 5 to the suction tube 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically recovering floating oil, and more particularly, to a cleaning process for various types of cleaning machines and solvent tanks, a recovery of floating oil in an oil-water separation layer, and a method for recovering oil mixed in cooling water and the like. The present invention relates to a floating oil automatic recovery device used for recovery and recovery of various spilled oil components.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for the above purpose, FIG.
A device using a float 31 as shown in FIG. This is achieved by disposing a pair of floats 31 at the lower end of a suction pipe 33 extending into a tank fixed to a tank wall 32, and moving the gate pipe 3 up and down following the movement of the floats 31.
4 is slidably fitted to the suction tube 33. In this apparatus, the float 31 moves up and down in accordance with the water level, and the gate pipe 34 moves up and down with the movement, whereby the floating oil is sucked into the suction pipe 33 from the upper end of the gate pipe 34. To collect.

[0003]

In the case of the above-mentioned conventional apparatus, since the space occupied by the float 31 is large, it takes up a lot of space for installation and is not easy to handle. In addition, since it has no filter, it is mixed in oil. Sucking in foreign matter,
The maintenance and life of the pump will be adversely affected. Therefore, the present invention has a compact structure and there is no fear of foreign matter suction,
It is an object to provide a floating oil automatic recovery device that can be used for a long time.

[0004]

According to the present invention, a net cover having an open lower surface is provided, and a suction pipe having a lower half portion extending downward from the lower surface opening is attached to a central portion of an upper surface of the net cover. A suction port communicating with the inside of the pipe is formed in the lower half of the pipe, and the oil is introduced into the base, the expandable bellows cylinder installed on the base, and the central portion fixed to the upper inside of the bellows cylinder. A bellows tank comprising a float having a hole is provided, the suction pipe is loosely inserted in the oil inflow hole, and the lower end portion of the bellows tank is fixed to the base to attach the bellows tank to the suction pipe. The above problems have been solved by using a floating oil automatic recovery device.

[0005]

[Operation] The presence of the net cover blocks foreign matter,
Foreign matter is prevented from entering the bellows tank.
After the floating oil is once stored in the bellows tank, it is always suction-recovered from the suction port of the suction pipe below the water surface, so that the floating oil recovery ability is high.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a longitudinal sectional view of the present apparatus. In the figure, reference numeral 1 denotes a net cover such as a cylindrical wire net having an opened lower surface, and the liquid level at the time of installation of the present apparatus is preferably in the middle of its peripheral surface. Are arranged as follows. This net cover -1 is for preventing floating solids from flowing into the inside thereof,
If clogged, remove and wash as appropriate.

A cylindrical rising portion 2 is formed in the center of the upper surface of the net cover 1, and a bush joint 3 having a collar is fitted therein and screwed. A suction pipe 4 is screwed to the bush joint 3 from below. The lower half of the suction pipe 4 projects from the lower surface of the net cover-1,
A bellows tank 5 is provided so as to cover that part and a part slightly above it. That is, the bellows tank 5 is
The base 6 has a female thread at the center, and a male thread 7 provided at the lower end of the suction pipe 4 is screwed into the female thread to integrate the base 6 with the suction pipe 4. Is done. A suction port 8 communicating with the inside of the suction pipe 4 is formed in a lower half portion of the suction pipe 4, in other words, in a portion of the suction pipe 4 inside the bellows tank 5.

The bellows tank 5 has an elastic bellows body 9 made of an oil-resistant material fixed on a base 6 via a fastening band 10 and the like, and a recovery port 9a is formed on the upper surface. A float 11 is disposed on the upper inside of the bellows barrel 9.
The float 11 is made of, for example, hard styrofoam and has a thick acrylic resin coating on the surface. The upper surface of the float 11 is slightly inclined downward toward the center. An oil inflow hole 12 is provided in the center of the upper surface, and the suction pipe 4 is inserted into the oil inflow hole 12 in a loosely inserted state. Inside the bellows body 9, a steel wire 13 for retaining the shape is provided. A pipe 14 extends from the pump 15 and is screwed to the bush joint 3 in a state of communicating with the suction pipe 4.

FIG. 3 shows an example of a basic circuit diagram incorporating the present apparatus, which is installed in the coolant tank 16. In the coolant tank 16, oil 17 and water 18 are stored in a separated state. The pipe 19 on the side of the discharge pump 15 a of the pump 15 is guided to the separation layer 20. 21 is a drain drain. The air pipe 22 of the pump 15 on the side of the pneumatic motor 15b is connected to a switching valve 24 controlled by a timer 23. Reference numeral 25 is a pressure gauge, 26 is a pressure reducing valve with a relief, and 27 and 28 are filters.

The operation of the apparatus having the above-described structure will be described. Prior to the operation of the pump 15, the bellows tank 5 is filled with oil and water in advance so that the upper end of the recovery port 9a slightly comes out of the water surface. At this time, bellows body 9 is float 11
(See the imaginary line in FIG. 1 and FIG. 2A), and the balance state is maintained in that state.
Then, when the pump 15 starts operating, the inside of the suction pipe 4 first becomes a negative pressure, and the oil and water filling the inside of the bellows tank 5 are forcibly sucked into the suction pipe 4 through the suction port 8.

Thus, the bellows tank 5 is in a negative pressure state, and together with the action of the external water pressure, the bellows body 9 contracts against the buoyancy of the float 11. As a result, the recovery port 9a of the bellows tank 5 sinks below the water surface, and the floating oil flows into the bellows tank 5 from the recovery port 9a (FIG. 2).
(B)). The steel wire 13 serves to prevent the bellows barrel 9 from being deformed when the bellows tank 5 is in a negative pressure state.

Further, since the floating oil always flows into the bellows tank 5 after passing through the net cover-1, foreign matter mixed in is trapped when the floating oil passes through the net cover-1. The floating oil flowing into the bellows tank 5 is sucked into the suction pipe 4 from the suction port 8 and collected in the separation layer 20. When the floating oil 17 is collected in this manner (FIG. 2)
In (C)), the operation of the pump 15 is stopped. Pump 1
The operation of 5 is controlled by, for example, a timer. Thereafter, with the increase of the oil water, the bellows cylinder 9 is extended by the action of the float 11 and returns to the state of FIG.

[0013]

As described above, the present invention has a simple and compact structure, requires no installation space, has no danger of foreign matter being mixed in with the collection of floating oil, and has an effect that it can be used for a long time. .

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention.

FIG. 2 is a diagram showing an operation of the exemplary embodiment of the present invention.

FIG. 3 is a diagram showing an example of a basic circuit incorporating the device according to the present invention.

FIG. 4 is a front view showing an example of a conventional floating oil recovery device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Net cover 4 Suction pipe 5 Bellows tank 6 Base 8 Suction port 9 Bellows body 11 Float 12 Oil inflow hole

Claims (1)

[Claims] 1. A net cover having an open lower surface, a suction tube having a lower half extending downward from the lower surface opening is attached to the center of the upper surface thereof, and a lower half of the suction tube is provided in the lower half of the suction tube. Forming a suction port communicating with the base, the base and the base;
A bellows tank comprising a telescopic bellows body installed on a bellows and a float having an oil inflow hole in the center fixed to the upper part of the bellows body is provided, and the suction pipe is connected to the oil inflow hole. An automatic floating oil recovery device comprising the bellows tank attached to the suction pipe by loosely inserting and fixing a lower end portion of the base to the base.