JPH04294791A - Oil drawing device - Google Patents

Abstract

PURPOSE:To make it possible to rapidly draw liquid of high viscosity such as engine oil by providing an oil drawing nozzle which is inserted into a member from which oil is drawn out and providing an air mixing member in said nozzle. CONSTITUTION:When a drawing tube 1 is inserted into an oil gauge port 3 of an automobile and oil is sucked for about 3 seconds and the tube 1 is filled with the oil, resistance of pipe becomes larger due to the viscosity of oil and small diameter of the tube 1 and hence speed of sucking oil or drawing oil is largely lowered. And if a valve device C is opened for about 1 second, a check valve (b) is opened by the vacuum in an air tube (a), so that air flows into the tube 1 via the tube (a) and a merging point (r) and partially occupies the interior of the tube 1. Since the resistance of pipe when air is sucked is much smaller than that of oil, speed of oil passing through the tube 1 and an oil drawing hose 2 increases.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing high viscosity liquids such as engine oil and torque converter oil.

0002

[Prior art] Engine oil, torque converter oil, etc.
They are replaced when the vehicle has been driven for a predetermined period or distance. For example, when changing the engine oil, a metal or resin tube is inserted into the engine oil gauge port of the automobile, used oil is drained, and new oil is supplied.

0003

[Problems to be Solved by the Invention] However, the inner diameter, outer diameter, and length of the tube are restricted by the diameter and shape of the gauge port, and the piping resistance is increased due to the restrictions on the inner diameter, outer diameter, and length of the tube. It becomes noticeably larger. A similar situation exists with regard to torque converter oil and the like.

[0004] For this reason, in the past, the speed of drawing out high viscosity liquids such as engine oil and torque converter oil was very slow and took a long time, resulting in poor work efficiency and high costs.

The present invention was proposed in view of the above-mentioned problems, and an object of the present invention is to provide an oil extraction device that can quickly extract high viscosity liquids such as engine oil.

[0006]

SUMMARY OF THE INVENTION The oil extraction device of the present invention includes an oil extraction nozzle inserted into a member from which oil is to be extracted, and the nozzle is provided with an air entrainment member.

[0007] The word "oil" is used herein to include all high viscosity liquids such as engine oil and torque converter oil.

[0008] In carrying out the invention, the operation of the air entrainment member is preferably automatically controlled.

[0009]

[Operation] According to the present invention having the above-mentioned configuration, the oil extraction nozzle is provided with an air mixing member, and at the same time as the oil is sucked and extracted during the oil extraction operation, air is added to the extracted oil. Mix it with. The mixed air exists as bubbles in the oil, and the presence of the bubbles reduces the area of contact between the inner wall surface of the tubular member in the oil extraction nozzle and the oil. As a result, the resistance at the oil extraction nozzle (the inner wall surface of the tubular member inside the nozzle) is reduced, and the oil can be extracted quickly.

0010

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment having the basic structure of the present invention, in which a extraction tube 1 is connected to an oil extraction hose 2, and the extraction tube 1 is connected to an oil pan through an oil gauge port 3 of an automobile. It is inserted into 4. The oil pan 4 contains oil L to be extracted. Here, the extraction tube 1 constitutes a tubular member in the oil extraction nozzle.

Parallel to the extraction tube 1, the tube 1
An air tube a is provided which is much thinner than the drawing tube 1 and through which air passes. A check valve b and a valve device c are interposed in the air tube a to adjust the flow rate of air.

[0013] In FIG. 2, the oil extraction machine is designated as a whole by 2.
0, and there is an oil drain hose 2 inside it.
Contains a conduit 22 continuous with the waste oil tank 24, a pump 26 for oil extraction, a motor 28 for driving the pump, a control unit 30 for controlling the opening and closing of the motor 28 and the valve device c, and a start switch 32. has been done. Next, the operation of the embodiment shown in FIG. 1 will be explained with reference to FIGS. 2, 3, and 4.

When removing oil, when the start switch 32 is pressed after inserting the extraction tube 1 into the oil gauge port 3 of the automobile, the operation of the control unit 30 starts.
The motor 28 rotates, the pump 26 is driven, and at the same time the valve device c is controlled to open, for example, for 1 second every 3 seconds. When the pump 26 is driven in this way, the extraction tube 1
A vacuum is generated in the oil extraction hose 2, and the oil L is sucked and extracted from the oil pan 4 (FIG. 3). When the valve device c is closed, air does not flow into the extraction tube 1 via the air tube a and the merging point r.

When the oil is sucked for about 3 seconds and fills the extraction tube 1, piping resistance becomes large due to the viscosity of the oil and the small inner diameter of the extraction tube 1, and the speed of oil suction or oil extraction becomes extremely slow. It will drop. Then, when the valve device c is opened for about one second, the check valve b is also opened due to the vacuum inside the air tube a, and air flows into the extraction tube 1 through the air tube a and the confluence point r. The state shown in 4 is reached.

As is clear from FIG. 4, in this state, a portion of the extraction tube 1 is filled with air. and,
Since the piping resistance when drawing air is much smaller than that in the case of oil, the speed at which the oil passes through the extraction tube 1 and the oil extraction hose 2 increases. In other words,
The area where the oil L contacts the inner wall surface of the extraction tube 1 is reduced, and the extraction resistance is reduced.

Thereafter, the above-described operation is repeated to drain the oil L from the oil pan 4.

In this embodiment, if the check valve b is set to open when the negative pressure is 500 to 600 mmHg, air will be mixed in only when the viscosity is high, and air will not be mixed in when draining the low viscosity oil. Efficient sampling is possible.

FIGS. 5 and 6 show other embodiments of the invention. In this embodiment, the air tube a-1 is integrally formed with the extraction tube 1, the distal end of the air tube a-1 is closed 10, and communicated with the extraction tube 1 through a hole 11. Other points are substantially the same as those in the above-described embodiment, and therefore redundant explanation will be omitted. By doing this, the diameter of the tube can be reduced and it can be inserted smoothly into the oil gauge port.

FIG. 7 shows another embodiment of the invention. In this embodiment, the air tube a-2 communicates with the vicinity of the connecting portion between the extraction tube 1 and the oil exchanger extraction hose 2. In this embodiment, the inner diameter of the extraction tube can be increased and the resistance can be reduced. Although the oil passing through the extraction tube 1 is the same as in the conventional case, the resistance within the oil exchanger extraction hose 2 is reduced.

[0021]

[Effects of the Invention] According to the present invention, the speed of removing used oil is improved. The effect is particularly remarkable at the beginning of the sampling operation and at low temperatures.

[0022] Furthermore, as the extraction resistance is reduced, the load on the pump is significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a side view of one embodiment of the invention.

FIG. 2 is a front view showing the overall configuration of the present invention.

FIG. 3 is a side view illustrating the operation of the embodiment in FIG. 1;

FIG. 4 is a side view illustrating the operation of the embodiment shown in FIG. 1;

FIG. 5 is a side view of a second embodiment of the invention.

6 is a view taken along the X arrow in FIG. 5. FIG.

FIG. 7 is a side view of a third embodiment of the present invention.

[Explanation of symbols]

1... Extraction tube 2... Oil extraction hose 3... Car oil gauge port 4... Oil pan a, a-1, a-2... Air tube b... Check valve c. ...Valve device L...Oil

Claims (1)

[Claims] 1. An oil extraction device comprising an oil extraction nozzle inserted into a member from which oil is to be extracted, the nozzle being provided with an air mixing member.