JPS6268511A - Device for separating oil of gas-driven tool - Google Patents

Abstract

PURPOSE:To effectively remove droplets of oil carried by gas streams used in a gas-driven tool, by providing a short pipe for the introduction of discharged gas on the upper part of a vertical cylinder provided with spiral thread grooves along the inside surface thereof, an oil sump being provided removably at the lower part of said cylinder. CONSTITUTION:Spiral thread grooves 3 are provided on the inside surface of an oil separator 1, a short pipe 4 for introducing discharged gas to be connected to a discharge gas pipe from a gas-driven tool being provided at a part a little lower than the upper end of said oil separator. The inner bore of said short pipe 4 is in a direction tangent to the downward spiral curve of the thread groove 3. And, an oil sump 11 is removably attached to the lower part of a cylinder 2. Accordingly, when discharged gas 6 having high velocity blown off from the gas-driven tool is introduced, downward stream of high velocity and a centrifugal force is produced, causing droplets of oil carried by discharged gas to be effectively collected in the oil sump 11.

Description

[Detailed description of the invention] [Industrial application field] Kibumi is involved in equipment that removes oil droplets from gas.

More specifically, the present invention relates to a deoiling device for a gas-driven tool that removes oil droplets from the gas used in a compressed gas-driven tool such as a dental cutting tool equipped with an air turbine or an air motor.

[Conventional technology]

Compressed air-driven dental cutting tools with air turbines or air motors are used more often with repeated activations than with continuous use. Therefore, it is necessary to timely inject lubricating oil of an appropriate amount into the bearing portion, not only when a normal bearing is provided, but also when using an air bearing. This is because even with air bearings, it is necessary to prevent misalignment between the bearing surface and the shaft surface that occurs during startup. Therefore, an oil layer is sometimes mixed in the exhaust gas emitted from the cutting tool after it has been used to drive an air motor, etc., and there is a risk of contaminating the clothes of patients and dentists. Conventionally, exhaust gas from a cutting tool is passed through a filter such as absorbent cotton to remove oil droplets.

[Problem that the invention seeks to solve]

By the way, as mentioned above, conventional oil removal equipment requires consumables such as absorbent cotton and requires frequent cleaning, which increases the risk of staining hands etc. with oil each time. Oil droplets could not be removed sufficiently.

Therefore, the purpose of the unreleased J was to provide an oil removal device that can sufficiently remove oil droplets with a simple mechanism by collecting oil droplets from exhaust gas in a predetermined container. .

[Means for solving problems]

The technical means of the present invention is to provide a short pipe for introducing exhaust gas to connect an exhaust pipe from a gas-driven tool slightly below the upper end of a vertical cylindrical body with a spiral threaded groove along the inner peripheral surface. The inner hole of this short tube faces in the tangential direction of the F-direction rotation of the old thread groove, and a removable oil reservoir is provided at the bottom of the cylindrical body.

[Effect]

Since the exhaust gas discharged from the gas-driven tool and used to drive the air motor etc. still has sufficient residual pressure, the exhaust gas reaches the short pipe for introducing the exhaust gas through the exhaust pipe at high speed. Since the inner hole of the short tube faces in the tangential direction of the downward rotation of the spiral thread groove along the inner circumferential surface of the cylindrical body, the exhaust gas spirals at high speed along the thread groove. The oil droplets in the exhaust gas are separated by the difference in specific gravity due to the centrifugal force generated by the swirling movement of the exhaust gas, and are drawn into the thread groove. Being pushed. The pressed oil droplets usually try to diffuse along the inner peripheral surface of a cylindrical body made of a lipophilic material such as metal or plastic.

However, the oil is carried below the cylinder by the exhaust gas flow that swirls along the thread groove, and is collected in an oil sump container provided at the end of the cylinder.

When a predetermined number of strings have been stored, the oil reservoir container is removed and the oil is discarded. Note that when exhaust gas is ejected from the short pipe 4, a part of the exhaust gas is ejected upward from the short pipe nozzle 8, but some of the oil separated at this part also flows into the thread groove 3. It will descend along the way.

〔Example〕

Next, embodiments according to the present invention will be described based on the drawings. In FIGS. 1 to 3, reference numeral 1 denotes a deoiling device according to this embodiment. 2 is a vertical cylindrical body, and a spiral thread groove 3 is provided along its inner peripheral surface. Reference numeral 4 denotes a short pipe for introducing exhaust gas, which is provided slightly below the upper end 5 of the cylindrical body 2, and is used to collect exhaust gas 6 from an air-driven tool (not shown) such as a dental cutting tool as a gas-driven tool. Exhaust pipe to send (
(not shown).

As shown in FIG. 2, the inner hole 7 of the short tube 4 faces in the tangential direction of the downward rotation of the thread groove 3. 8 is short pipe 4
It is a spout of water.

Reference numeral 9 denotes a tapered bottom surface of a height aQ near the bottom of the cylindrical body 2, which reflects the exhaust gas 6 that has descended along the thread groove 3 upwards of the cylindrical body 2, and causes oil to flow downward. Reference numeral 10 denotes an introduction hole that guides oil downward, and is provided concentrically with the cylindrical body 2 near its lower part, and the introduction hole lO
The inner diameter of the cylinder body 2 is made sufficiently smaller than the inner diameter of the cylindrical body 2 to prevent the exhaust gas 6 from proceeding downward. Reference numeral 11 denotes an oil sump container, which is screwed onto the lower part of the cylindrical body 2. The oil sump container 11 is made of transparent or translucent glass, plastic, or the like.

As shown in FIG. 3, the deoiling device 1 is mounted at a suitable location by means of a saddle 12.

This embodiment operates as follows.

A flow of high-velocity exhaust gas 6 emitted from an air-driven tool such as a dental cutting tool passes through the exhaust pipe, reaches the layer 4 for introducing the exhaust gas, and is ejected from the spout 8 into the interior of the cylindrical body 2. It moves toward the bottom of the cylindrical body 2 to which the oil sump container 11 is attached while spirally turning along the thread groove 3. At this time, oil droplets in the exhaust gas 6 are pressed against the thread groove 3. At the same time, the exhaust gas 6 is pushed downward along the thread groove 3 by the flow of the exhaust gas 6. Further, the oil passes through an introduction hole 1o cut in the vicinity of the bottom of the cylindrical body 2, and is collected in the oil sump container 11.

On the other hand, the exhaust gas 6 from which oil droplets have been removed is turned back from the bottom surface 9 and travels upward through the center of the cylindrical body 2.

It is released into the atmosphere from the opening at the upper end 5 of the cylindrical body 2.

According to this embodiment, the oil reservoir 11 is made of a transparent or translucent material such as glass or plastic, so it is convenient to see the oil storage status in the oil reservoir 11 at a glance.

Moreover, if the volume of the oil sump container 11 is increased, the container 1
The time interval between extracting oil from 1 can be increased.

Furthermore, the inner diameter of the opening 13 of the oil reservoir 11 can be made sufficiently smaller than the inner diameter of the cylindrical body 2 to prevent the deoiled exhaust gas 6 from entering.

Furthermore, the number of short pipes 4 is not necessarily one as shown in FIGS. 1 to 3, but two short pipes 14, 14 may be installed as shown in FIG. 4, or three or more short pipes 14 may be installed. In addition, multiple connectors 15 can be connected to one short pipe 14 for use. Note that the short tube 14 that is not in use can be closed with a blind tube 16.

〔Effect of the invention〕

The present invention effectively collects oil droplets in the exhaust gas emitted from a gas-driven tool into an oil sump container by using a high-velocity downward flow along the thread groove of the exhaust gas and centrifugal force. Once a predetermined amount of oil has been collected in the container, the container can be removed, the oil alone can be discarded, and the container can be used again. Therefore, it is not necessary to clean consumables such as absorbent cotton or equipment as in the past, and oil droplets in the exhaust gas can be sufficiently removed with a simple mechanism without getting hands etc. dirty with oil.

[Brief explanation of drawings]

Figure 1 is a sectional view showing one embodiment of the present invention. Figure 2 is a cross-sectional view showing one embodiment of the present invention.
FIG. 3 is an exploded perspective view corresponding to FIG. 1, and FIG. 4 is an exploded perspective view showing another embodiment of the present invention. 1...Oil removal device 2...Cylindrical body 3...Thread groove 4...Short pipe 7...Inner hole 1
1...Oil sump container, @IIN Fig. 20 Fig. 3

Claims (1)

[Claims] A short pipe for introducing exhaust gas to connect the exhaust pipe from the gas-driven tool is provided slightly below the upper end of the vertical cylindrical body with a spiral thread groove along the inner circumferential surface, and the inner hole of this short pipe is A deoiling device for a gas-driven tool, characterized in that a removable oil reservoir is provided in the lower part of the cylindrical body and extends in the tangential direction of the downward rotation of the thread groove.