JPS592875Y2 - Floating chips removal device for coolant purification equipment - Google Patents

Description

[Detailed description of the invention] This invention is a device for purifying coolant discharged from cutting machines and grinding machines, especially in a settling tank where the coolant is pumped to a purification tank via a filter. This invention relates to a coolant purification device equipped with a conveyor for discharge.

Conventionally, in such a one-lunt purification system, if the coolant returned from the processing machine to the settling tank contains chips of light metals such as aluminum alloy, floating chips will be generated on the surface of the coolant in the settling tank. Although it is easy to do so, if the coolant surface is almost covered with floating chips, the coolant surface will not be in contact with the outside air, which will cause the coolant to rot when the coolant purification device is stopped, leading to a decrease in coolant performance. This is particularly noticeable in water-soluble coolants where fats and oils float to the surface.

The object of the present invention is to quickly and reliably discharge the above-mentioned floating chips using a sediment discharge conveyor without impairing the sediment discharge function during normal coolant purification.

The present invention provides an opening located above the normal water level when the coolant purification device is activated in the partition wall that forms the conveyor passage for sediment lift in the sedimentation tank, and raises the water level of the sedimentation tank to a certain water level located within the opening. A coolant return device is installed between the purifying liquid tank and the sedimentation tank so that the water can be raised, and a nozzle is installed to propel the floating chips on the surface of the coolant at the constant water level toward the opening for sedimentation detection. The pump is characterized in that a valve is attached to the discharge side of the pump so as to selectively connect the conduit to the filter and the conduit to the nozzle.

An embodiment of the present invention will be described below with reference to the drawings.

The coolant purification device includes a pump 5 in a pipe line 4 connecting a sedimentation tank 2 and a purified liquid tank 3, which are arranged in parallel and sharing a partition wall 1.
Insert the filter 6 into the sedimentation tank 2, and insert the bottom plate 2a into the sedimentation tank 2.
, a scraper conveyor 7 with an inclined wall plate 2b serving as a trough is attached to enable the discharge of sediment, and the inclined portion of the scraper conveyor 7 is a sediment lift conveyor formed by partitioning the inside of the sedimentation tank 2 with a partition wall 8. Pass through passage 9.

The coolant flowing into the settling tank 2 from the processing machine via the coolant inflow path 10 connected to the end on the side of the partition wall 8 in the settling tank 2 flows toward the pipe line 4 communicating with the opposite end. In the meantime, chips and the like contained therein are sedimented and separated, and then sent to the purification tank 3 via the filter 6 by the pump 5, but when this coolant purification device is in operation, the normal water level in the sedimentation tank is approximately at the level indicated by the chain line A. The deposits on the bottom plate 2a are conveyed to the conveyor 7 which is driven by the drive wheels 7a on both sides and moves along in the direction of the arrow F.
The chips are scraped up and transported to the outside of the tank by the scraper 7b, and fall into the chip receiver 12.

On the other hand, the clean coolant in the purified liquid tank 3 is sent to the processing machine via the pipe line 14 by the pump 13, which has a smaller pumping volume than the pump 5, but the normal water level in the purified liquid tank at this time is indicated by the chain line B. The water level is maintained approximately at the water level of , and excess clean coolant is drained into the sedimentation tank 2.

The coolant return device includes a solenoid valve 15 inserted into a conduit 14 on the discharge side of the pump 13, and a solenoid valve inserted into a conduit 16 that communicates the conduit 14 between the solenoid valve 15 and the pump 13 with the settling tank 2. 1
7 is inserted so that the coolant in the purified liquid tank 3 can be returned to the sedimentation tank 2 by the pump 13, and an opening is made in the partition wall 8 when the water level in the sedimentation tank 2 is above the normal water level A. It includes a float switch 19 which detects when a certain water level located within 18 is reached and issues a signal to stop the above-mentioned coolant return.

20 is floating chips C on the surface of the coolant that has reached a certain water level.
The nozzle 20 is fixedly supported on the sedimentation tank 2 side so as to be propelled in the E direction toward the opening 18. The nozzle 20 is connected to the discharge port of the pump 5 via a solenoid valve 21.

22 is a solenoid valve inserted into the conduit 4 on the discharge side of the pump 5;
Reference numeral 3 indicates a water level detection float switch attached to the purified liquid tank 3, and the float switch 23 issues a signal when the water level of the purified liquid tank 3 reaches a predetermined minimum level to notify the operator of an abnormality.

It is assumed that each pump 5.13 and solenoid valves 15.17, 21.22 are automatically controlled by a control electric circuit that achieves the functions described below.

When the coolant purification system is in operation, the solenoid valves 15 and 22 are opened, and the solenoid valves 17 and 21 are kept closed to drive the pumps 5 and 13, and the coolant that has flown back into the settling tank 2 from the processing machine is returned to the above-mentioned state. After purification, the coolant is sent to a purified liquid tank 3, and the coolant in the purified liquid tank 3 is sequentially supplied to processing machines.

Therefore, the water levels in tanks 2 and 3 are maintained at approximately normal water levels A and B.

Therefore, float switch 19 is open and float switch 23 is closed.

If it becomes necessary to remove floating chips during the operation of the coolant purification system, close the push button switch for removing floating chips in the control electric circuit described above, and the signal will first turn off valve 1.
5.22 is closed and only the valve 17 is opened (valve 21 remains closed), and the pump 5 is stopped and only the pump 13 is driven.

Therefore, the coolant in the purifying liquid tank 3 is returned to the settling tank 2 via the pipe 16, and the water level in the iron tank 2 rises.

When the water level in the tank 2 reaches a certain level located in the opening 18, the float switch 19 closes and activates the timer.
The pump 13 is stopped and the valve 17 is closed, and the valve 21 is opened to drive the pump 5 (the valves 15 and 22 are kept closed) for a certain period of time.

For this reason, all the nozzles 20 are connected to the discharge port of the pump 5, and coolant is ejected from the nozzles, propelling the floating chips C toward the opening 18 together with the surface layer of the coolant. It is pushed into the passage 9 and scraped up and discharged by the scraper 7b of the conveyor 7 that slides on the inclined wall plate 2b.

When the above-mentioned timer operation stops, the signal causes valve 2 to
1 closes, opens the valve 22.15, and returns to the operating state of the coolant purification device that drives the pump 13, and the pump 5,
Due to the difference in the amount of liquid pumped between 13 and 13, the water level in sedimentation tank 2 is normal water level A.
The water level in the purified liquid tank 3 rises to the normal water level B.

Although one embodiment has been described above, if the liquid in the sedimentation tank 2 is extremely contaminated, there is a risk that the nozzle 20 will become clogged.If you want to avoid this, the suction side of the pump 5 should be A sediment test suction pipe 4a and a purified liquid test suction pipe 4b are connected in parallel to the pipe pipe 4a.

Solenoid valves 24 and 25 are inserted into each of the solenoid valves 24 and 25, and depending on the degree of contamination of the liquid in the sedimentation tank, only one of the two solenoid valves is made to perform the above-mentioned opening/closing operation, and the other is maintained in the closed state. Bye.

According to the present invention, during normal coolant purification, the fluctuation of the liquid level in the settling tank 2 is blocked by the partition wall 8 and is hardly transmitted to the conveyor passage 9 for lifting the sediment.
There is no risk that the sediment being scraped up by the nozzle will spill out as the liquid moves, impairing the sediment discharge function, and the coolant ejected from the nozzle propels floating chips and floating oil. The floating chips and the like can be quickly sent into the conveyor passage 9 and discharged by the sediment discharge conveyor without changing the composition.

[Brief explanation of the drawing]

Figure 1 is a vertical front view, Figure 2 is a sectional view taken along line XX in Figure 1,
FIG. 3 is a longitudinal sectional front view of main parts of another embodiment. 2... Sedimentation tank, 3... Purification tank, 4...
...Pipe line, 5...Pump, 6...
Filter, 7...Scraper conveyor, 8...
... Bulkhead, 9 ... Conveyor passage for sediment lift, 10 ... Coolant inflow path, 13 ...
...Pump, 14゜16...Pipe line, 18...
...Opening, 19...Float switch, 2
0... Nozzle, A, B... Normal water level,
D: Constant water level.

Claims (2)

[Scope of utility model registration request] (1) In a coolant purification system in which a conveyor is installed in the sedimentation tank to enable the discharge of sediment, a conveyor passage for lifting sediment is formed in the sedimentation tank where the coolant is pumped to the purification tank via a filter. An opening located above the normal water level when the coolant purification device is in operation is provided in the partition wall, and an opening is provided between the purification tank and the settling tank so that the water level in the settling tank can be raised to a constant water level located within the opening. A coolant return device is installed, and a nozzle that propels floating chips on the surface of the coolant at the constant water level toward the opening is installed for sediment detection, and a pipe to the filter and a pipe to the nozzle are installed on the discharge side of the pump. A floating chip removal device for a coolant purification device, characterized in that a valve is attached to selectively connect the channels. (2) Scope of Utility Model Registration In the floating chip removal device for the coolant purification device as described in claim (1), the sedimentation inspection suction pipe and the purification tank suction pipe are connected to the suction port of the pump through valves, respectively. connected in parallel.