JP3081893U - Sludge settling tank - Google Patents

Abstract

(57) [Summary] (Modified) [PROBLEMS] To provide a sludge sedimentation tank constituting a coolant purifying apparatus employing a novel system capable of improving the filtration accuracy of a coolant flowing out of a sludge sedimentation tank. In a sludge settling tank (32) constituting a coolant purifying device for settling and filtering a coolant containing sludge such as chips or abrasives flowing out from a machine tool such as cutting and grinding, a flow of coolant is rectified. Box 3
4, a first settling tank 38 provided with a side inclined plate 37 for scraping sludge settled on the bottom 35, a partition plate 39 having an underflow structure in the settling tank, and a coolant outlet 40
The first settling tank 38 and the second settling tank 38 are located at a position lower than the coolant outlet 40 of the second settling tank 41.
A gutter 42 for communicating the settling tank 41 is provided.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 According to the present invention, chips or abrasives are discharged from a coolant containing cuttings or sludge such as abrasive grains flowing out of a machine tool for performing cutting or grinding (hereinafter, also referred to as a processing mother machine). The present invention relates to a sludge sedimentation tank that constitutes a coolant cleaning device for separating sludge such as particles and filtering the coolant.

[0002]

[Prior art]

 In the industry, in order to improve the recyclability, when a coolant containing a sludge such as chips or abrasive grains flowing out of a processing mother machine is filtered by a coolant cleaning device, a coolant cleaning device is used. There is a need to improve filtration accuracy. FIG. 3 shows a conventional filtration method for separating and removing sludge contained in a circulating coolant using a sludge settling tank constituting a coolant cleaning apparatus. The dirty coolant containing sludge in the coolant, which is used at the time of processing by the processing mother machine and then flows out of the processing mother machine, flows from the arrow 48 above the sedimentation tank 47 into the rectifying box 34 in the sedimentation tank 47. Then, sludge such as abrasive grains contained in the dirty coolant precipitates in the coolant in the settling tank 47 and deposits on the bottom 35 of the settling tank 47. The sediment sludge 44 can be discharged to the outside by scraping along the side inclined plate 37 of the sedimentation tank 47 by the deck 36. The coolant in the sedimentation tank 47 which has flowed into the sedimentation tank 47 and in which the sludge contained in the coolant has been settled and filtered, overflows from the partition wall 49 in the sedimentation tank 47 together with the floating sludge 43 floating on the coolant. Then, it is discharged from the coolant outlet 40 to the outside of the sedimentation tank 47, sent to a chip filtering device such as the magnetic separator 11, and re-filtered.

[0003]

[Problems to be solved by the invention]

 Claim 1 of the present invention is to provide a sludge sedimentation tank adopting a new method which can improve the filtration accuracy of the coolant flowing out of the sludge sedimentation tank, unlike the above-described method. Make it an issue.

[0004]

[Means for Solving the Problems]

 The sludge sedimentation tank according to claim 1 is a sludge sedimentation tank for filtering a coolant containing sludge, such as chips or abrasive grains, which is discharged from a processing mother machine by sedimentation. A first sedimentation tank provided with a side inclined plate for scraping out sludge settled in a tank, a partition plate having an underflow structure in the sedimentation tank, a second sedimentation tank provided with a coolant outlet, and a coolant in the second sedimentation tank A gutter for communicating the first sedimentation tank and the second sedimentation tank is provided at a position lower than the outlet.

[0005]

[Embodiment of the invention]

 The sludge sedimentation tank according to the present embodiment is a sludge sedimentation tank that constitutes a coolant cleaning device that performs processing of a coolant containing sludge such as chips or abrasive grains flowing out of a processing mother machine. The sludge sedimentation tank that constitutes the coolant cleaning apparatus according to the present embodiment filters the coolant containing sludge such as chips or abrasives flowing out of the processing mother machine in order to improve the recyclability. There is a demand for improving the filtration accuracy of the sludge sedimentation tank when performing the sludge sedimentation tank constituting the coolant cleaning apparatus. Hereinafter, typical embodiments of the present invention will be described with reference to the drawings. However, the dimensions, shapes, materials, relative positions, etc. of the components described in this example are not intended to limit the scope of the present invention to these unless otherwise specified. , Are merely illustrative examples.

[0006] A sludge settling tank constituting a coolant cleaning apparatus according to the present embodiment in a case where sludge such as magnetic chips or abrasive grains is contained in the coolant flowing out of the processing mother machine, FIG. A description will be given based on FIG. FIG. 1 is an explanatory view of the sludge settling tank of the present invention, and FIG. 2 is an explanatory view showing an example of an embodiment when the sludge settling tank of the present invention is incorporated in a coolant cleaning device.

In the case where the coolant flowing out of the processing mother machine contains sludge such as magnetic chips or abrasive grains, the coolant cleaning apparatus according to the present embodiment includes a sludge settling tank 32 of the present invention, It is composed of a magnetic separator 11, a coolant pump 12 for circulating coolant, a circular coolant tank 14 having two coolant pumps of a coolant pump 13 for pumping processed clean coolant to a processing mother machine, and the like.

[0008] The magnetic chips or coolant containing abrasive grains and the like flowing out of the processing mother machine first flow into the magnetic separator 11, where the magnetic chips in the coolant are processed. The magnetic separator 11 includes a non-magnetic rotating cylinder, a rotating cylinder 15 having a fixed magnet built therein, and an electric motor 16 for rotating the rotating cylinder 15. The processing is performed by passing magnetic chips or coolant containing abrasive grains through the inside 18 to adsorb and separate the magnetic substance sludge in the coolant on the outer periphery of the rotary cylinder 15. The treated coolant that has flowed out of the magnetic separator 11 flows into the circular coolant tank 14 from the tangential direction along the inner wall of the circular coolant tank 14 and generates a vortex 27 in the coolant. The magnetic sludge adsorbed on the outer periphery of the rotary cylinder 15 is dewatered by being pressed by the squeezing roller 19, scraped off by the scraping plate 20, and discharged into the receiving box 21.

A coolant pump 12 for circulating coolant is installed on an outer wall of the circular coolant tank 14, and a clean coolant is similarly supplied to a clean tank 22 installed on an outer wall of the circular coolant tank 14. A coolant pump 13 for pumping to the machine tool is provided. The coolant pump 12 for circulating coolant installed on the outer wall of the circular coolant tank 14 is connected by a pipe 30 to a coolant outlet 29 provided at the center of the bottom surface 33 of the circular coolant tank 14. 14 Pump the coolant in the center of the bottom surface 33.

The coolant in the circular coolant tank 14 is generated by the coolant pump 12 pumping the coolant in the center of the inner surface 33 of the circular coolant tank 14. In the northern hemisphere, a left-handed vortex 27 is generated from the coolant outlet 29 at the center of the bottom surface 33 of the circular coolant tank 14 to the upper surface of the liquid surface of the circular coolant tank 14 due to the suction force of the circular coolant tank 14. The vortex 27 is amplified, and the remaining chips or abrasives in the coolant that cannot be collected by the magnetic separator 11 are rotated with the coolant by the left-handed vortex 27 in the circular coolant tank 14 while rotating. Gradually settle, circular coolant It is collected at the center of the bottom surface 33 of the tank 14.

Due to the vortex 27 generated in the circular coolant tank 14, chips remaining in the coolant that cannot be collected by the magnetic separator 11 and are collected at the center of the bottom surface 33 of the circular coolant tank 14, or Abrasive particles are provided on the outer wall of the circular coolant tank 14 from a coolant outlet 29 provided at the center of the bottom surface 33 of the circular coolant tank 14 via a pipe 30 together with the coolant in the circular coolant tank 14. It is sucked by a coolant pump 12 for coolant circulation and sent to a sludge settling tank 32.

The remaining chips or abrasives in the coolant that could not be collected by the magnetic separator 11 and accumulated in the center of the bottom surface 33 of the circular coolant tank 14 are removed together with the coolant into a sludge settling tank 32. Is flowed into the inflow coolant rectification box 34, and the coolant is rectified.

The sludge settling tank 32 includes an inflow coolant rectifying box 34, a first settling tank 38 provided with a side inclined plate 37 for scraping sludge settled at the bottom 35 by a deck 36, and an underflow in the settling tank. A second settling tank 41 provided with a partition plate 39 having a structure, a coolant outlet 40, a first settling tank 38 provided at a position lower than the coolant outlet 40 of the second settling tank 41, and a second settling tank A gutter 42 for communicating the tank 41 is provided.

The coolant containing residual chips or abrasive grains pumped from the circular coolant tank 14 by the coolant pump 12 for circulating the coolant is supplied to the coolant rectifying box 34 of the first settling tank 38 as described above. And the coolant is rectified.

Due to the rectification of the coolant in the first settling tank 38, the settling sludge 44 in the coolant is deposited on the bottom 35 of the first settling tank 38, and the floating sludge 43 in the coolant is set in the first settling tank 38. It floats on the coolant level of 38. The coolant in the first settling tank 38 flows into the second settling tank 41 via a gutter 42 provided at an intermediate position of the liquid level of the first settling tank 38 and communicated with the second settling tank 41. The sediment sludge 44 deposited on the bottom 35 of the first sedimentation tank 38 is scraped out to the outside by the deck 36 via the side inclined plate 37 and floated on the coolant level of the first sedimentation tank 38. The sludge 43 passes over the outer wall 45 and flows into the magnetic separator 11 again to be processed again.

The sludge contained in the coolant that has flowed from the first settling tank 38 to the second settling tank 41 via a gutter 42 that is communicated with the second settling tank 41 is removed from the second settling tank 41. At 41, it is separated again into a sedimentation sludge 44 and a floating sludge 43 and filtered. The filtered coolant is sent from the coolant outlet 40 to the clean tank 22 of the coolant purifying device via the partition plate 39 having an underflow structure, and together with the clean coolant in the circular coolant tank 14, the clean coolant is removed. The coolant is pumped to the working mother machine by the coolant pump 13. The floating sludge 43 in the second sedimentation tank 41 also flows over the outer wall 46 and flows into the magnetic separator 11 again to be processed again, like the floating sludge 43 in the first sedimentation tank 38. Also, the position of the coolant effluent at the coolant outlet 40 and the heights of the outer wall 45 and the outer wall 46 are kept equal to each other in order to minimize the discharge of the coolant from the sludge settling tank 32 to the magnetic separator 11.

In addition to the above, the coolant cleaning apparatus according to the present embodiment includes an air entrainment prevention plate 28 for preventing entrainment of air into the coolant circulation coolant pump 12 in the circular coolant tank 14, and a circular coolant tank. A coolant discharge nozzle 25 for amplifying the vortex 27 in the nozzle 14 is provided.

In the present embodiment, when the chips contained in the coolant flowing out of the processing mother machine are magnetic materials, and when the processing mother machine is a grinding machine, the chips of the magnetic material are contained in the coolant flowing out of the processing mother machine. In addition, a description has been given of a case where abrasives and the like are contained, but the magnetic separator 11 in the present embodiment is replaced with a filter device or the like, so that the chips discharged together with the coolant from the processing mother machine are non-magnetic materials. Can also respond. In addition, the device of the present invention is not limited to the embodiment described above and shown in the drawings as described above, and can be appropriately changed without departing from the gist.

[0019]

[Effect of the invention]

 In the sludge settling tank according to the first aspect, since the settling tank is of a two-tank type, the filtration accuracy can be improved. Coolant discharged from the sludge settling tank can be used as clean coolant. Since the amount of coolant returned from the sludge sedimentation tank to the magnetic separator together with the buoyant sludge is extremely small compared to the conventional type, there is no need to increase the processing capacity of the magnetic separator. Thus, a new sludge settling tank can be provided as compared with a conventional sludge settling tank. In addition to the above effects, the effects of reducing the frequency of cleaning the coolant tank, preventing decay of the coolant, and reducing running costs can be considered. By extending the length of the machine, the performance of the processing machine can be maintained and overall operation costs can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing the front of a sludge settling tank of the present invention.

FIG. 2 is an explanatory view showing a front view of an example in which the sludge settling tank of the present invention is incorporated in a coolant cleaning device.

FIG. 3 is an explanatory view showing the front of a conventional sludge settling tank.

[Explanation of symbols]

Reference Signs List 11 ... magnetic separator 12 ... coolant pump (for coolant circulation) 13 ... coolant pump 14 ... circular coolant tank (for clean coolant pressure feeding) 15 ... rotating cylinder 16 ... electric motor 17 ··· Bottom plate 18 ···································································································・ Coolant discharge nozzle 26 ・ ・ ・ Adjustment valve 27 ・ ・ ・ Swirl 28 ・ ・ ・ Air entrapment prevention plate 29 ・ ・ ・ Coolant outlet 30 ・ ・ ・ Piping 31 ・ ・ ・ Cut hole 32 ・ ・ ・ Sludge settling tank 33 ... Bottom surface 34 ... Rectifier box 35 ... Bottom 36 ... Derecchi 37 ... Side inclined plate 38 ... First sedimentation tank 39 ... Partition plate 40 ... Coolant outflow 41: second settling tank 42 ... gutter 43 ... floating sludge 44 ... settling sludge 45 ... outer wall (first settling tank) 46 ... outer wall (second settling tank) 47 ..Precipitation tank 48 ・ ・ ・ Arrow 49 ・ ・ ・ Partition wall

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Sadao Fujisaki 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (72) Inventor Takeshi Ogushi 1 Toyota Town Toyota City, Toyota City, Toyota Motor Corporation ( 72) Inventor Tetsuo Seki 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (72) Inventor Toshihiro Yasuda 1 Toyota Town Toyota City, Aichi Prefecture Toyota Motor Corporation

Claims (1)

[Utility model registration claims] A sludge settling tank for filtering a coolant containing sludge, such as chips or abrasives, flowing out of a machine tool for performing cutting or grinding, etc., by a sludge settling tank for filtering inflow coolant. A first settling tank having a side inclined plate for scraping out the sludge settled at the bottom, a partition plate having an underflow structure in the settling tank, a second settling tank having a coolant outlet, (2) A sludge settling tank provided with a gutter at a position lower than a coolant outlet of the settling tank for communicating the first settling tank and the second settling tank.