JPS6331698Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present application relates to a separation device used in pneumatic equipment such as a compressor.

Pneumatic equipment is equipment that operates with compressed air, and the compressed air is released into the atmosphere after use. This exhaust air contains oil carried away from the equipment in the form of a mist, which must be separated before being released into the atmosphere. Also, when the compressed air is discharged, it makes noise, so a muffler is also required. Therefore, separation devices that have these functions have been proposed. As shown in FIG. 1, the conventional device has a cylindrical overbody 5 between a cover 2 having an exhaust inlet 1 in the center and a cup-shaped oil reservoir 4 having a drain hole 3 in the bottom wall. It has a structure in which these are integrated. overbody 5
These include an inner layer element 8 in which paper or glass fibers are filled into a chamber formed by the inner and outer porous cylinders 6 and 7, and an outer layer element 9 made of urethane foam or thick fiber nonwoven fabric formed around the outer periphery of the inner layer element. Consists of. The portions of the outer layer element 9 other than both ends directly face the outside of the device. 10 is lath metal.

Exhaust gas flows in from the inlet 1, flows through the overbody 5, and is discharged to the atmosphere. Oil mist in the exhaust is
It is captured and aggregated by the overbody 5, and then transferred to the oil reservoir 4.
to fall. At the same time, the exhaust sound is absorbed by the overbody 5.

Such conventional devices have the following drawbacks. That is, in the above case, the overbody 5
The oil mist captured by the outer peripheral element 9 falls by gravity and is collected at the lower end, but at that time, it is carried away by the exhaust flow and released into the atmosphere. It is thought that the reason why such a drawback occurs is that the pore diameter of the outer layer element 9 needs to be formed relatively coarse in order to prevent an increase in flow resistance, so that it is easily carried away by the exhaust flow. In addition, when the outer layer element 9 is made thin, the oil accumulated at the lower end of the element becomes difficult to fall into the oil reservoir 4 and has more opportunities to be exposed to the exhaust flow, so there is no risk of the oil being carried away in the same way. arise.

Therefore, in view of the above, in the present application, the height of the outer layer element of the overbody is made larger than the inner layer element, and the structure is such that the outer layer element of the overbody is separated as much as possible from the exhaust flow path, thereby reducing the retention of oil mist captured in the overbody. This reduces the rate of departure as much as possible.

To explain by way of an embodiment, FIG. 2 shows a separation device 11 of the present invention, which has an inlet 1 in the center of one side.
An overbody 17 is disposed in a chamber formed by a substantially disk-shaped cover 13 with a cover 13 provided with 2 and a cup-shaped case 16 having a plurality of discharge ports 14 on the side wall and a drain 15 on the bottom wall. Become. The overbody 17 is composed of an inner layer element 22 whose lower end is sealed with an end plate 21 with a glass fiber 20 filled between porous inner and outer tubes 18 and 19, and an outer circumferential element 23 provided on the outer periphery of the inner layer element 22. The upper ends of the inner and outer layer elements 22 and 23 are
It is inserted and fixed into an annular groove 24 provided on the other side of the cover 13. Outer layer element 2 of overbody 17
3 is made of breathable polyurethane foam or non-woven fabric of nylon or polyester fibers. Here, the lower end of the outer layer element 23 extends below the lower end of the inner layer element 22. At the same time, the lower end of the outer layer element 23 extends downward from the lower end of the outlet 14 in the side wall of the case 16. Case 1
The portion below the discharge port 14 of 6 is an oil reservoir 25.
form. The upper end of the case 16 is attached to the outer periphery of the cover 13.

In the above embodiment, the discharge port 14 is connected to the case 1.
6 The structure is such that multiple pieces are provided on the side wall, but the first
As in the conventional structure shown in the figure, the discharge port may be formed all around the side surface of the case. In this case, the case becomes an oil reservoir and the oil reservoir is held in excess.

The separation device 11 is used with an inlet 12 connected to a compressed air discharge path of a pneumatic device (not shown).

In FIG. 2, exhaust gas containing oil mist flows into the device 11 from the inlet 12, flows through the overbody 17, and flows out from the outlet 14 to the atmosphere. When the oil mist in the exhaust gas flows through the inner layer element 22, it aggregates and becomes coarse, and then passes through the outer layer element 2.
Captured by 3. The oil mist captured by the outer layer element 23 descends due to gravity and temporarily stays at the lower end of the outer layer element 23. As the amount of oil remaining increases, the oil further falls into the oil reservoir 25 and is collected there. oil reservoir 2
When the oil in 5 reaches a predetermined amount, the drain 15 is operated to drain the oil out of the device.

The exhaust gas flowing through the overbody 17 passes around the entire circumference of the inner layer element 22, then passes through the outer layer element 23 and flows out from the outlet 14, but in this case, the exhaust gas is located below the lower ends of the inner layer element 22 and the outlet 14. Exhaust air rarely passes through the lower end of the outer layer element 23. As a result, the trapped oil that remains at the lower end of the outer layer element 23 is
Not carried away by the exhaust stream.

As described above, in the separation device for pneumatic equipment of the present invention, the lower end of the outer layer element protrudes downward from the lower ends of the inner layer element and the exhaust outlet, so that the oil trapped at the lower end of the outer layer element is removed. This prevents oil from being carried away by the exhaust flow and improves oil separation efficiency.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional device, and FIG. 2 is a sectional view of the device of the present invention. 17... Hyperbody, 22... Inner layer element, 2
3... Outer layer element.

Claims (1)

[Scope of utility model registration request] A cover with an inlet in the center has an upper end of an overbody consisting of an inner element whose porous inner cylinder is filled with glass fiber and whose lower end is sealed by an end plate, and an outer element provided around the outer periphery of the element. In a separation device in which a cup-shaped case with a drain on the bottom wall and an outlet on the side wall is connected to the outer periphery of the cover, the lower end of the outer layer element of the overbody is placed below the lower ends of the inner layer element and the outlet. Separation device for pneumatic equipment featuring a protruding structure.