JP3133412U - Coolant liquid recycling system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coolant liquid recycling system capable of completely removing grinding powder and abrasive grains mixed in a coolant liquid of a grinding machine or the like.
SOLUTION: A cyclone device 5 for separating a dirty liquid B of a coolant liquid of a grinding machine 2 into a clean liquid and an exhaust liquid containing sludge, taking out the clean liquid as a recycle liquid and discharging an exhaust liquid containing sludge. The waste liquid containing the sludge discharged from the cyclone device 5 is separated into solid and liquid by centrifugal force, and the separated solid content is drained by centrifugal force and continuously discharged to the outside. The liquid was provided with an automatic discharge centrifuge 6 that was filtered and taken out as a recycled liquid.
[Selection] Figure 1

Description

  The present invention relates to a coolant liquid recycling system for returning a dirty liquid of a coolant used mainly in a grinding machine or the like to a clean liquid for recycling.

Technical background

  Conventionally, when a metal or the like is ground with a grindstone of a grinder, a coolant is applied to the grinding portion for the purpose of lubrication, cooling and cleaning. The liquid used over the grinding portion becomes a dirty liquid in which grinding powder and grindstone powder (hereinafter referred to as abrasive grains) are mixed together and returned to the flow tank.

  Here, when the dirty liquid is returned to the tank for recycling, generally, a magnetic separator or the like is placed in the middle of the dirty liquid returning to the tank to remove iron.

  However, since the abrasive particles mixed in the dirty liquid cannot be removed by the magnetic separator, they are gradually stored in the tank. When the abrasive grains stored in the tank are pumped up and applied to the product being ground as a coolant, there is a problem that the surface of the product is scratched and a serious defect is caused in quality.

  There is also a method of collecting with a cyclone device and dropping the abrasive grains downwards and storing them in a dedicated abrasive box, but since the liquid and abrasive grains are mixed, it will eventually overflow and be collected from the box. Part of the collected abrasive will also flow out. For this reason, the factory is soiled and the working environment is deteriorated. Also, since the liquid is constantly taken out, the clean liquid must be replenished.

  Therefore, it has been a long-standing concern in the grinding industry to completely remove the abrasive grains, but the current situation is that no satisfactory one has been made.

  Therefore, in order to solve the above-described problems, the present invention has an object to provide a coolant liquid recycling system capable of completely removing grinding powder and abrasive grains mixed in the dirty liquid, in other words, sludge.

  In order to solve the above-mentioned problem, the invention described in claim 1 of the present application separates a dirty liquid of a coolant liquid such as a grinding machine into a clean liquid and an exhaust liquid containing sludge, and takes out the clean liquid as a recycled liquid. A cyclone device that discharges sludge containing sludge, and a solid-liquid separation of the sludge discharged from the cyclone device using centrifugal force, and a continuous discharge of the separated sludge while removing the sludge by centrifugal force It has a conical screw wing, and is provided with an automatic discharge type centrifugal separator in which the separated liquid is filtered and taken out as a recycled liquid.

  Further, the invention according to claim 2 of the present application is directed to a tank divided into a clean liquid chamber for storing a coolant liquid supplied to a grinding machine or the like and a dirty liquid chamber for storing a dirty liquid of a used coolant liquid, and a dirty liquid. A cyclone device that separates the dirty liquid pumped from the chamber into clean liquid and discharged liquid containing sludge, returns the clean liquid to the clean liquid chamber as recycled liquid, and discharges the discharged liquid containing sludge, and the cyclone apparatus The effluent containing sludge discharged from the solid is separated into solid and liquid by centrifugal force, and the separated sludge is drained by centrifugal force and continuously discharged to the outside, and the separated liquid is filtered. And an automatic discharge type centrifugal separator that is returned to the clean liquid chamber as a recycled liquid.

  According to the present invention, the dirty liquid pumped from the dirty liquid chamber by the cyclone device is separated into clean liquid and discharged liquid containing sludge, and the clean liquid is taken out as a recycled liquid and discharged liquid containing sludge is discharged. The effluent containing the sludge discharged from the cyclone device is separated into solid and liquid by centrifugal force using a conical screw blade of an automatic discharge type centrifuge, and the separated sludge is continuously discharged while being dehydrated by centrifugal force. The separated liquid can be filtered and taken out as a recycled liquid. Therefore, the grinding powder and abrasive grains mixed in the dirty liquid can be removed together as sludge separated from the liquid. As a result, the clean liquid is supplied as the grinding liquid, so that the product is not damaged and the quality is reduced. Will improve. Further, the discharged solid content is drained to reduce the volume, and is discarded as industrial waste. However, the cost is reduced and the amount of waste is reduced, which is preferable for the global environment. Furthermore, since the drained liquid can be reused as a clean liquid, waste can be reduced. In addition, clean liquid replenishment is also kept to a minimum. Moreover, since the abrasive grains and the metal powder are separated and filtered regardless of the material, the amount stored in the tank is drastically reduced as compared with the conventional magnetic separator filtration method. Therefore, the cleaning of the tank is greatly reduced, and the management cost is greatly reduced. Furthermore, since the factory is not soiled, the working environment is improved and hands are not soiled.

  In addition, there is a tank that is divided into a clean liquid chamber that stores the coolant liquid supplied to the grinding machine and a dirty liquid chamber that stores the dirty liquid of the used coolant liquid, and the dirty liquid pumped from the dirty liquid chamber is pumped. Supply to the cyclone device and separate into clean liquid and sludge containing waste liquid in the cyclone device, return the clean liquid as recycle liquid to the clean liquid chamber and automatically discharge sludge containing sludge into the centrifuge side The condensate screw blade of this centrifuge separates the discharged liquid containing sludge by solid-liquid separation by centrifugal force, and continuously discharges and separates the separated solids while removing liquid by centrifugal force. If the liquid is filtered and returned to the clean liquid chamber as recycled liquid, in addition to the effects described above, the dirty liquid and clean liquid are clearly separated. With it supervises as can be supplied as without grinding fluid to clean liquid recycled mixes with the dirty liquid is returned to the clean liquid chamber, thereby also eliminates scratching to more products, preferred because the quality is improved.

Best mode for carrying out the invention

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a coolant liquid recycling system applied to a grinding machine according to the present invention. The coolant liquid recycling system 1 is a clean liquid that stores a clean liquid A of a coolant liquid supplied to a grinding machine 2. The tank 3 divided into the dirty liquid chamber 3b in which the dirty liquid B of the used coolant liquid is stored and the dirty liquid B pumped up from the dirty liquid chamber 3b by the pump 4 is clean liquid and discharged liquid containing sludge. The cyclone device 5 returns the clean liquid to the clean liquid chamber 3a and discharges the discharged liquid containing sludge from the lower part, and the discharged liquid containing the sludge discharged from the cyclone apparatus 5 is solid-liquid separated by centrifugal force. In addition, the separated sludge has conical screw blades 62 that are continuously discharged to the outside while removing the sludge by centrifugal force. Is obtained by a centrifugal separator 6 of the automatic emptying back into the clean liquid chamber 3a is filtered as recycle liquid.

  The clean liquid A in the clean liquid chamber 3a is sent to an appropriate grinding location of the grinding machine 2 through a supply pipe 8 by a pump 7 provided in the upper part of the clean liquid chamber 3a, and the dirty liquid used in the grinding machine 2 is used. B is discharged to the dirty liquid chamber 3 b of the tank 3 through the discharge pipe 9.

  Further, the clean liquid chamber 3a and the dirty liquid chamber 3b of the tank 3 are juxtaposed through the partition wall 3c, and the partition wall 3c is formed lower than the peripheral wall 3d, and the clean liquid A passes through the partition wall 3c. If it exceeds, it will become the structure replenished to the dirty liquid chamber 3b side.

  The dirty liquid B in the dirty liquid chamber 3b is pumped up by a pump 4 provided in the upper part of the liquid chamber 3b, and is sent to the cyclone device 5 through the delivery pipe 10.

  The cyclone device 5 applies a centrifugal force to the dirty liquid B fed from the delivery pipe 10 into the inverted conical cylindrical body 5a by the in-cylinder rotational flow, and converts the clean liquid on the upper side and the discharged liquid containing the lower sludge. The separated liquid is returned to the clean liquid chamber 3a via the upper return pipe 11, while the discharged liquid containing sludge is discharged and dropped from the lower discharge port 5b.

  As shown in FIG. 2, the automatic discharge centrifuge 6 includes a conical screw blade 62 provided at the center of the case body 61, a conical rotary drum 63 provided so as to wrap the screw, and an upper portion of the case body 61. Provided with a differential-equipped motor 64. The conical screw wing 62 and the conical rotating drum 63 are rotatably supported by the case body 61 via upper and lower bearings, respectively, and a slight gap is provided between the conical screw wing 62 and the conical rotating drum 63. The conical screw blades 62 and the conical rotary drum 63 are separately connected to the motor 64 via the differential device 65, and the conical screw blades 62 and the conical rotary drum 63 are very small. It is designed to rotate in the same direction while maintaining a large rotational difference. In other words, the conical screw blade 62 is rotated slightly faster than the conical rotating drum 63, and the solid content received by the centrifugal force due to the rotation of the conical rotating drum 63 is pressed against the inner wall by the conical screw blade 62. It is configured to be scraped up and guided upward. Further, openings 63 a... 63 a are formed in the upper part of the peripheral wall of the conical rotary drum 63, and a space is provided between the peripheral wall of the conical rotary drum 63 and the inner wall of the case body 61, and the solid scraped up by the screw blades 62. A discharge passage 66 for discharging the portion from the openings 63a... 63a is formed. Further, the upper part of the rotating cylinder shaft 62a of the conical screw blade 62 is communicated with the discharge port 5b of the cyclone device 5, and the discharged liquid is received in the rotating cylinder shaft 62a. A plurality of discharge ports 62b for discharging the gas are opened. A return chamber 67 is provided below the conical rotary drum 63, and the liquid separated in the conical rotary drum 63 is taken into the return chamber 67 through the filtering holes 63b... 63b provided at the bottom thereof, and the return chamber 67 is filtered. The clean liquid A is returned to the clean liquid chamber 3a through the return pipe 12. A collection box 13 that communicates with the discharge passage 66 and stores the solid content in the lower portion of the return chamber 67 is provided below the case body 61.

  In the embodiment shown in the figure, the conical rotating drum 63 is rotated by a first upper bearing portion 68 a provided at the upper portion of the case body 61 and by a first lower bearing portion 68 b provided at the lower portion in the return chamber 67. The rotary cylinder shaft 62a of the conical screw blade 62 is supported freely, and the upper part is provided in the second upper bearing part 69a provided in the conical rotary cylinder 63, and the lower part thereof is provided in the second lower bearing provided in the conical rotary cylinder 63. The portion 69b is rotatably supported. Further, the first gear 65a of the differential device 65 is connected to the input gear 62c provided at the tip of the rotary cylinder shaft 62, and the differential device is connected to the input gear 63c provided at the upper end of the second upper bearing portion 69a of the conical rotary drum 63. The second gears 65b are meshed with each other. In addition to using a gear-type differential device, a pulley and a belt-type differential device may be used.

  Next, the operation of the coolant liquid recycling system will be described.

  When the dirty liquid B in the dirty liquid chamber 3 b is used as a recycled liquid, first, the dirty liquid B in the dirty liquid chamber 3 b is pumped up by the pump 4 and fed into the cylindrical body 5 a of the cyclone device 5 through the delivery pipe 10.

  Next, a centrifugal force is applied to the dirty liquid B fed in the cyclone device 5 by the in-cylinder rotational flow, and the upper liquid is separated into the upper liquid and the lower liquid containing sludge, and the clean liquid is returned to the upper part. While returning to the clean liquid chamber 3a through the pipe 11, the discharged liquid containing sludge is discharged and dropped into the rotary cylinder shaft 62a of the centrifuge 6 from the lower discharge port 5b.

  As a result, the discharged liquid containing sludge passes through the rotary cylinder shaft 62 a and is discharged from the discharge port 62 b into the conical rotary cylinder 63, and the discharged liquid is centrifuged by the rotation of the conical screw blades 62 and the conical rotary cylinder 63. Solid-liquid separation with. At that time, since the conical screw blade 62 is rotated slightly faster than the conical rotating drum 63, the solid content pressed against the inner wall by the centrifugal force due to the rotation of the conical rotating drum 63 is scraped by the conical screw blade 62. Will be raised. Then, the separated solid content is continuously moved to the upper side of the conical rotating drum 63 while further draining by centrifugal force, and the separated solid content is discharged from the upper opening 63a of the conical rotating drum 63 to the outer discharge passage 66 side. Then, it is stored in the recovery box 13 below the return chamber 67 from the discharge passage 66. Further, the liquid separated by the conical screw blade 62 and the conical rotating drum 63 enters the return chamber 67 through a filtration hole 63b provided at the bottom of the conical rotating drum 63, and is supplied as a clean liquid through the return pipe 12 as a recycled liquid. It is returned to the chamber 3a and supplied as a clean liquid A to the grinding part for the purpose of lubrication, cooling and cleaning.

  As described above, according to the coolant liquid recycling system of the present invention, the grinding powder and abrasive grains mixed in the dirty liquid B can be removed together as sludge separated from the liquid, and as a result, a clean liquid is ground. By being supplied as a liquid, the product is not damaged and the quality is improved. Further, the discharged solid content is drained to reduce the volume, and is discarded as industrial waste. However, the cost is reduced and the amount of waste is reduced, which is preferable for the global environment. Furthermore, since the liquid that has been drained is returned to the clean liquid chamber 3a as the clean liquid A and can be reused, waste can be reduced. In addition, the replenishment of the clean liquid A is kept to a minimum. Moreover, since the abrasive grains and the metal powder are separated and filtered regardless of the material, the amount stored in the tank is drastically reduced as compared with the conventional magnetic separator filtration method. Accordingly, the cleaning of the tank 3 is greatly reduced, and the management cost is greatly reduced. Furthermore, since the factory is not soiled, the working environment is improved and hands are not soiled.

  It is a partially cutaway side view of the coolant liquid recycling system according to the present invention.   It is an enlarged vertical sectional view of the centrifuge in the recycling system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Recycle system 2 Grinding machine 3 Tank 3a Clean liquid chamber 3b Dirty liquid chamber 4 Pump 5 Cyclone device 6 Centrifuge 62 Conical screw blade A Clean liquid B Dirty liquid

Claims (2)

  A cyclone device and a cyclone device for separating the dirty liquid coolant used in a grinding machine into clean liquid and sludge-containing discharge liquid, taking out clean liquid as recycle liquid and discharging sludge-containing discharge liquid The effluent containing sludge discharged from is solid-liquid separated by centrifugal force, and the separated liquid is continuously discharged to the outside while removing the solid content by centrifugal force, and the separated liquid is filtered. A coolant liquid recycling system comprising an automatic discharge centrifuge which is taken out as a recycling liquid.   A tank divided into a clean liquid chamber that stores the coolant liquid supplied to the grinding machine, etc. and a dirty liquid chamber in which the dirty liquid of the used coolant liquid is stored, and the dirty liquid pumped from the dirty liquid chamber with clean liquid A cyclone device that separates the waste liquid containing sludge and returns the clean liquid to the clean liquid chamber as a recycled liquid and discharges the waste liquid containing sludge, and the waste liquid containing the sludge discharged from the cyclone apparatus by centrifugal force. It has a screw blade that separates solids and liquids and continuously discharges the separated solids to the outside while removing the liquid by centrifugal force. The separated liquid is filtered and returned to the clean liquid chamber as recycled liquid. A coolant liquid recycling system comprising a separator.

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