JPS6015995Y2 - spray lubrication device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a device that uses compressed air to atomize a lubricating liquid and transfer it to a location that requires lubrication.

In this type of equipment, the mist discharged from the nozzle at the transfer end becomes a cooling mist due to adiabatic expansion, which is used to lubricate and cool the cutting surface, extending the life of the cutting tool, and removing chips and other tools with compressed air. In addition to the above purposes, this type of equipment is also used to lubricate bearings in conveyors and general machinery, as a release agent in press molding, and as a die-casting machine. It can also be used to supply a mold release agent for molds.

In a conventional device of this kind, as shown in Fig. 1, compressed air from a compressed air source a is set to a desired pressure by a pressure reducing valve with a filter, and is led into a lubricant tank d via a directional control valve C. Two pipes are led out from this tank b, one of which opens at the bottom of the tank d as a lubricant pipe e and reaches the end of use via a throttle f, and the other as a compressed air pipe g. The aperture f is derived from the space above the diaphragm f.
The lubricating liquid is merged into the lubricating liquid pipe e at an introduction portion formed on the downstream side of the lubricating liquid, where the lubricating liquid is turned into mist and sprayed to a desired location.

The above configuration had the following drawbacks.

a. It was not possible to significantly change the ratio of lubricating fluid to compressed fluid.

b If you want to change the particle size of the mist appropriately depending on the purpose of use, especially if you need a large particle size, the tank pressure will also be low because it is necessary to lower the air pressure.
The amount of lubricant and discharge amount was not satisfactory (especially when the viscosity of the lubricant was high).

In the case of intermittent operation C, the tank pressure repeats the atmospheric pressure and the operating pressure, resulting in a delay in spraying at operation (switching valve C) and a continuation of spraying due to residual tank pressure at stop (switching valve C).

d When sending only compressed air, the compressed air is first introduced into the tank, then the tank is pressurized and then the compressed air is sent out, so there is a time loss in the middle.

e Lubricating fluid could not be replenished without stopping the directional control valve.

Here, this invention solves the above-mentioned drawbacks a and b by configuring two compressed air pipes and providing a throttling means in one of them. The present invention provides a spray refueling system which solves the above drawbacks C and d by configuring a pilot valve, and solves the above drawback e by configuring a check valve with an orifice in the pressurized pipe line of the tank.

Next, the device of this invention will be explained with reference to the circuit diagram shown in FIG.

Cleaned compressed air from a compressed air source 1 passes through a known predetermined device (for example, the above-mentioned pressure reducing valve with a filter, etc.) and is branched from a pipe line 2 into three pipe lines 2a, 2b, and 2c, with the pipe line 2a being a pressure reducing valve. The pipe line 2b communicates with a first compressed air line 5 passing through a pilot valve 4 through a valve 3, the line 2b communicates with a pilot line 7 which switches the pilot valve 4 through a switching valve 6, and the line 2C communicates with a pilot line 7 which switches the pilot valve 4. It communicates with a second compressed air line 9 via an on-off valve 8.

A branch pipe 1 opens from the first compressed air pipe 5 to a lubricant tank 11 via a check valve 10 with an orifice.
2 is branched, and a lubricant pipe line 13 led out from the inner bottom of the tank 11 passes through the pilot valve 4 and reaches a spray nozzle section 14.

In this case, the first compressed air line 5 and the lubricant line 13 are simultaneously opened and closed by the switching operation of the pilot valve 4.

In the spray nozzle section 14, throttling means 15 and 16 are separately provided in the lubricating liquid pipe line 13 and the first compressed air pipe line 5, and on the downstream side of these throttling means 15 and 16, both pipe lines 5 and 13 are provided. It has a double pipe structure consisting of a lubricating liquid pipe 5 on the inside and a compressed air pipe 13 on the outside, leading to a nozzle opening 17.

Note that the second compressed air pipe 9 joins the first compressed air pipe 5 on the downstream side of the throttle means 16.

In the above configuration, the inside of the lubricant tank 11 is pressurized by the pressure adjusted by the pressure reducing valve 3, and in this state, when the switching valve 6 is switched by electromagnetic operation or the like,
The pilot valve 4 is switched, and the flow rate of the compressed air from the compressed air line 5 and the lubricant pushed out by the pressure in the tank 11 is adjusted appropriately by the throttle means 16° 15 in the spray nozzle section 14, and the nozzle opening is adjusted as appropriate. 17
The amount of compressed air at this time can be changed from zero by the throttle means 16, and if a large flow rate is required, by opening the on-off valve 8,
A large amount of changes can be made.

When only air jetting is required, the throttling means 15 of the lubricating fluid pipe is closed, but by closing the pilot valve 4, the air in the compressed air pipe 5 or 9 is discharged from the nozzle opening 17. All you have to do is make it erupt.

3 to 7 show the circuit diagram shown in FIG. 2 as an actual diagram, and FIGS. 3 and 4 show the main body, which is a tank in one case 18 as a whole. 1
1. Pipeline 2. 2a, 2b, 2c, a first compressed air line 5, a pilot line 7, a lubricating liquid line 13, and various valves are built in. .16 and the mode of merging of the second compressed air pipe line 9.
are respectively shown as needle valves installed in a base body 19, and this base body 19 is arranged within a range within which a pin 22 fitted into a long hole 21 formed outside the fulcrum 20 can move within this long hole 21. The nozzle opening 17 can be oscillated in the
This increases the possibility of changing the orientation of.

The pipe line leading to the nozzle opening 17 is shown as a flexible double pipe, the inner pipe of which constitutes the lubricant pipe line 13, and the outer pipe forming the first compressed air pipe line after the second compressed air line 9 joins. This constitutes the compressed air pipe line 5.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of the conventional device, Fig. 2 is a circuit diagram of the device of this invention, Figs. 3 to 7 show its actual diagram, and Figs. 3 and 4 are plan views of the main body. 5 is a plan view of the soubrei nozzle portion, FIG. 6 is a cross-sectional view thereof, and FIG. 7 is a cross-sectional view taken along the line ■-■ in FIG. 6. In the figure, 1... compressed air source, 4...
...Pilot valve, 5...First compressed air pipe line, 7...Pilot pipe line, 8...Opening/closing valve, 9......No. Second compressed air pipe, 10...
...Check valve with orifice, 11...Lubricant tank, 13...Lubricant pipe line, 14...
... Spray nozzle section, 15, 16 ... Throttle means, 17 ... Nozzle opening.

Claims (1)

[Claims for Utility Model Registration] 1. A pilot valve that operates to switch using compressed air from a compressed air source as pilot pressure, and a lubricating liquid pipe that stops the supply of lubricating liquid in a lubricating liquid tank by the switching operation of this pilot valve. a first compressed air pipe that communicates with the compressed air source, opens and closes simultaneously with the lubricant pipe by opening and closing the pilot valve, and merges with the lubricant pipe at its end to generate a lubricant mist; , a pressurized pipe branched from the compressed air pipe and introducing supply pressure into the lubricant tank; A spray lubrication device that configures a second compressed air line that joins the line. 2. Spray lubrication according to claim 1, wherein the lubricating liquid pipe and the first compressed air pipe are individually provided with throttling means to adjust the flow rate in these pipes. Device. 3. The spray lubrication device according to claim 1, wherein the conduit is comprised of a flexible tube. 4. The spray lubrication device according to claim 1, which is a registered utility model and comprises an on-off valve interposed in the second compressed air pipe.