JPH09295242A - Liquid processing equipment - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To effectively prevent clogging of a filter plate used in a liquid filtration process and reduce the burden of maintenance. SOLUTION: A bottomed cylindrical filter plate 24 is concentrically provided inside a cylindrical processing tank main body 11 having a liquid introduction port for introducing the liquid L from a tangential direction through a liquid swirling space 23 in which the liquid L swirls. Arranged in a shape. Inside the filter plate 24, a cylindrical dam plate 27 having an upper surface opened via an annular recess 26 is concentrically arranged. In the annular recess 26 between the filter plate 24 and the dam plate 27, a liquid jetting body 31 for jetting backwashing liquid to the filter plate 24 is provided so as to be rotatable. A liquid take-out pipe for taking out the liquid from the center of the bottom of the dam plate 27 to the outside of the processing tank main body 11.
43 will be provided. An agglomerate discharge conveyor for discharging the agglomerates settled at the bottom of the processing tank body (11) to the outside of the processing tank body (11) is provided. The barrier plate 27 secures a constant filtration area in the filter plate 24 due to its height, and even when the flow rate of the liquid L is small, the barrier plate 27 is provided.
Ensure a filtration area equivalent to a height of 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a coolant solution for assisting processing such as cutting and polishing by a machine tool for cooling or lubrication, and processing such as cutting injected from an ultra-high pressure generator. The present invention relates to a liquid processing apparatus for separating and removing impurity particles such as metal powder mixed at the time of processing from a processing liquid or the like performed at a time.

[0002]

2. Description of the Related Art As a conventional liquid processing device for machine tools, as shown in Japanese Utility Model Publication No. 5-2271, a scraper is used to remove floating chips on the liquid surface of the coolant in a dirty tank kept at a constant water level. There is a chip removing device that scrapes the floating chips to the outer periphery of the magnetic drum by scraping them to the magnetic drum of the magnetic separation device by a type chip conveyor, and defoaming and defoaming and discharging them.

This magnet drum system is expensive because a special magnet drum is used, and the recoverable object is limited to magnetic metal powder which can be attracted by a magnet such as iron powder, and non-magnetic which cannot be attracted by the magnet. There is a problem that metal powder cannot be collected.

On the other hand, a swirling flow type filter device using a filter plate as shown in Japanese Patent Publication No. 60-15372, for example, is used to remove dust in water by a mechanism which is completely different from that of the magnet drum system. If so, the problem of the magnetic drum as described above can be solved.

That is, a cylindrical filter plate having innumerable small holes is concentrically provided in a cylindrical tank body into which raw water before treatment is introduced from the tangential direction through a swirling flow space in which raw water swirls. Cylindrically arranged, a cylindrical pressure difference reducing shield plate having an opening on the lower surface is concentrically arranged through a gap inside the filter plate, and the filtered water flowing into the inside of the filter plate is filtered. There is one that is taken out from the bottom of the tank to the outside of the tank body by an extraction pipe.

[0006] In this filtering device, first, the heavy dust is centrifugally separated toward the tank body side by the swirl flow generated in the swirl flow space portion, and then the light dust and water are separated by the filter plate. By reducing the pressure difference between the outer and inner parts of the filter plate with the pressure difference reducing shield plate, the flow of water that vigorously passes through the small holes of the filter plate and flows into the inside is suppressed. At the same time, the swirling flow on the outer peripheral surface of the filter plate can be maintained, which prevents clogging due to adsorption of dust to the small holes of the filter plate.

[0007]

The filtering device is effective in removing dust in water when water is drawn from a river into an irrigation canal. However, impurities such as metal powder generated by machining a machine tool are produced. It is not suitable when used as it is as a liquid treatment device for separating and removing impurity particles from a liquid containing particles, and the impurity particles cannot be effectively separated and removed.

In particular, impurity particles such as relatively light metal powder such as aluminum chips are not easily separated when attached to the filter plate, and are likely to cause clogging of the filter plate. Therefore, it is necessary to frequently take out the filter plate and scrape off the impurity particles adhering to the peripheral surface thereof with a wiper, which requires a lot of maintenance work.

The present invention has been made in view of the above points, and it is an object of the present invention to effectively prevent clogging of a filter plate used in a liquid filtration process and reduce a maintenance load. Is.

[0010]

According to a first aspect of the present invention, there is provided a liquid treatment apparatus for separating and removing impurity particles from a liquid, which has a liquid introduction port for introducing the liquid tangentially and a bottom portion. A cylindrical processing tank body having a settling tank portion, a bottomed cylindrical filter plate concentrically arranged with respect to the processing tank body through a liquid swirling space in which the liquid swirls inside the processing tank body, A cylindrical weir plate having an upper surface opened concentrically with respect to the filter plate through an annular recess inside the filter plate; and a liquid take-out pipe for taking out the liquid from the inside of the weir plate to the outside of the processing tank main body. It is a liquid processing apparatus equipped with.

Impurity particles in the liquid aggregate while swirling, settle at the bottom of the processing tank body, and are separated from the liquid flowing into the inside of the filter plate. The liquid flowing into the filter plate is
Further, the weir plate overflows and is taken out to the outside by the liquid take-out pipe. The barrier plate has a function of ensuring a certain filtering area in the filter plate by its height, reducing the pressure difference between the inside and the outside of the filter plate, and maintaining a swirling flow on the outer peripheral surface of the filter plate.

According to a second aspect of the present invention, in a liquid treatment apparatus for separating and removing impurity particles from a liquid, a cylinder having a liquid inlet for introducing the liquid in a tangential direction at the top and a precipitation tank portion at the bottom. -Shaped processing tank main body, bottomed cylindrical filter plate concentrically arranged with respect to the processing tank main body through the liquid swirling space in which the liquid swirls, and the inner circumference of the filter plate The liquid processing apparatus is provided with a liquid jetting body that is swivelable along a surface and jets the liquid onto a filter plate, and a liquid take-out pipe that takes out the liquid from the inside of the filter plate to the outside of the processing tank main body.

The liquid jetting body jets the liquid to the filter plate while swirling along the inner peripheral surface of the filter plate, and the impurity particles adhering to the outer peripheral surface of the filter plate flow in the direction opposite to the forward flow of the liquid. Separate and remove by backwashing. The impurity particles separated from the filter plate settle on the bottom of the processing tank body.

According to a third aspect of the present invention, in a liquid processing apparatus for separating and removing impurity particles from a liquid, a cylinder having a liquid inlet for introducing the liquid in a tangential direction at the top and a precipitation tank portion at the bottom. -Shaped processing tank main body, cylindrical bottomed cylindrical filter plate concentrically arranged with respect to the processing tank main body through the liquid swirling space in which the liquid swirls inside the inside of this processing plate Cylindrical weir plate with its upper surface opened concentrically with respect to the filter plate through the annular recess, and an annular recess between the filter plate and the weir plate that is swivelable and ejects liquid onto the filter plate. The liquid processing apparatus is provided with a liquid jetting body for removing the liquid from the inside of the dam plate to the outside of the processing tank main body.

The liquid jetting body jets the liquid to the filter plate while swirling between the filter plate and the weir plate while securing a certain filtering area in the filter plate by the height of the weir plate. Impurity particles adhering to the outer peripheral surface of are removed by a backwash flow in the opposite direction to the liquid.

According to a fourth aspect of the present invention, the liquid jetting body in the liquid processing apparatus according to the second or third aspect is provided with a nozzle oblique to the radial direction in the direction opposite to the swirling direction. Then, the liquid jetting body swirls with no power by the reaction of the backwash flow jetted from the nozzle, and separates and removes the impurity particles attached to the outer peripheral surface of the filter plate by the backwash flow.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIGS.

In FIG. 3, reference numeral 10 denotes an outer tank for storing the coolant liquid, the processing liquid, etc. discharged from the processing section of the machine tool. Inside the outer tank 10, a cylindrical processing tank body of the present processing apparatus is provided. Install 11.

A pumping pump 12 is provided outside the outer tank 10, a suction port of the pumping pump 12 communicates with the outer tank 10, and a discharge port of the pumping pump 12 passes through a large-diameter pipe line 13 to form a cylinder. It is opened to the upper opening of the liquid introduction tank 14 connected to the processing tank body 11 of the shape. The liquid introducing tank 14 is tangentially connected to a liquid introducing port 15 opened on the side surface of the processing tank main body 11.

On the other hand, in the large-diameter pipe line 13, a flow rate adjusting valve is provided.
A pipe joint 17 for branching the pipe is provided together with 16, and the pipe joint 17 branches a small-diameter pipe 18 for backwashing. A swivel joint (rotating joint) is attached to the tip of this small-diameter conduit 18.
A backwash mechanism 20 is rotatably mounted via 19.

As shown in FIG. 1 (A), the processing tank body
A cylindrical filter plate 24 is arranged inside the chamber 11 concentrically with respect to the processing tank body 11 through a liquid swirling space 23 in which the liquid L swirls. A flange 25 is formed integrally with the upper opening edge of the filter plate 24.

The filter plate 24 has at least 12 in the lower half.
It is a dust-removing screen formed into a cylindrical shape in which fine meshes of about 0 mesh are uniformly provided. Only the liquid L can be transmitted from the liquid swirling space 23 through the meshes.

Furthermore, a cylindrical weir plate 27 having an upper surface concentrically opened with respect to the filter plate 24 is disposed inside the filter plate 24 via a ring-shaped annular recess 26. The upper end of the weir plate 27 is opened at an intermediate height of the filter plate 24 to form an overflow part 28.

The height of the cylindrical dam plate 27 can keep the liquid level flowing into the processing tank main body 11 at a certain level or higher by its height, so that a predetermined filtration area of the filter plate 24 can be secured. As a result, it is possible to prevent the filtering function of the filter plate 24 from concentrating on a small area, improve the filtering performance, and prevent the filter plate 24 from being clogged. Particularly, even when the flow rate into the processing tank main body 11 is small, the height of the barrier plate 27 can ensure a predetermined filtration area.

Further, the dam plate 27 functions as a resistor against the inward flow of the liquid L, reduces the pressure difference between the outer side portion and the inner side portion of the filter plate 24, and the mesh of the filter plate 24. While it is possible to suppress the flow of water passing through in the radial direction and flowing into the inside, the treatment tank body 11 is the outer peripheral wall of the swirl flow, while the dam plate 27 functions as the inner peripheral wall of the swirl flow, It also has a function of maintaining the swirling flow of the liquid L. By the function of these dam plates 27, the inflow vector of the liquid L to the filter plate 24 is maintained in the tangential direction, and it becomes difficult for impurities such as metal powder to be adsorbed in the mesh of the filter plate 24 to prevent clogging. There is.

In the annular recess 26 between the filter plate 24 and the dam plate 27,
In the backwash mechanism 20, a liquid ejecting body 31 for ejecting liquid to the filter plate 24 is provided so as to be rotatable.

The liquid ejecting body 31 of the backwash mechanism 20 is a shaft tube with a bearing 33 attached to the central portion of the processing bath main body 11 by a mounting plate 32 which is fixed over the upper opening edge of the processing bath main body 11. 34
Are rotatably supported.

The shaft tube 34 is formed by the swivel joint 19 described above.
Is rotatably connected to the small diameter conduit 18. Shaft tube 34
On the lower side, arm tubes 35 are provided symmetrically, and on the lower half of each of these arm tubes 35, a large number of nozzles 36 for ejecting liquid to the filter plate 24 are vertically arranged.

As shown in FIG. 1B, the liquid jet 31
The nozzle 36 is provided so as to project obliquely in the direction opposite to the turning direction R with respect to the radial direction. The swirling direction R of the liquid ejecting body 31 is the same as the swirling flow of the liquid L.

Returning to FIG. 1 (A), a liquid outlet 42 is opened at the center of a bottom plate portion 41 which the filter plate 24 and the weir plate 27 have in common. Processing tank body 11
A liquid take-out pipe 43 penetrating from one side surface to the other side surface is horizontally provided along the bottom plate portion 41.

The liquid take-out pipe 43 flows into the inside of the filter plate 24 and takes out the liquid that has passed through the annular recess 26 and the dam plate 27 to the outside. 44
Are opened, and liquid outlets 45 are opened at both ends of the liquid extraction pipe 43.

As shown in FIG. 2, the liquid take-out pipe 43 is a gutter-shaped duct formed by a flat plate-shaped upper plate portion 43a and an arc-shaped lower plate portion 43b.

Further, the bottom of the processing tank main body 11 is provided with an inverted conical precipitation tank portion 51 whose diameter is gradually reduced downward. Impurity particles such as metal powder in the liquid are swirled in the liquid swirl space.
While swirling in 23, it grows due to the interference aggregating action and becomes an agglomerate that is made into large particles, and this agglomerate settles in the precipitation tank portion 51 by its own weight.

The sedimentation tank portion 51 is provided with a lower portion of an aggregate discharge conveyor 52 for transferring the aggregate obliquely upward and discharging it to the outside.

The aggregate discharge conveyor 52 is provided with a settling tank section 51.
A cylindrical conveyor casing 53 is inserted obliquely upward with respect to the inside, and a long spiral blade 55 integrated with the rotating shaft 54 over the entire length of the inside of the conveyor casing 53.
Is rotatably fitted. An aggregate discharge port (not shown) for discharging aggregates is provided on the upper part of the conveyor casing 53, and a motor with a reducer (not shown) for rotating the rotary shaft 54 is further provided on the upper end of the casing on the upper side thereof. Is installed.

Next, the operation of the illustrated embodiment will be described.

When a liquid such as a coolant liquid containing impurity particles such as metal powder generated by the machining of a machine tool is supplied into the outer tank 10, this liquid is pumped up by the pump 12 and the liquid from the large diameter pipe line 13 is supplied. It flows from the liquid introduction port 15 through the introduction tank 14 into the processing tank main body 11 in the tangential direction.

The liquid L introduced from the tangential direction into the processing tank main body 11 is swirling in the liquid swirling space 23. Impurity particles such as metal powder contained in the liquid swirl generate centrifugal force and self-weight due to swirling. By this, it settles while swirling in the liquid swirling space 23, and is separated from the liquid L sucked inward through the mesh of the filter plate 24.

At this time, the flat liquid take-out pipe 43 provided along the bottom plate portion 41 of the filter plate 24 does not disturb the swirling flow of the liquid L as much as possible due to its shape, and the impurity particles settle while swirling. Does not interfere with movement.

Impurity particles such as cutting powder and polishing powder grow while repeating the mutual agglomeration action between the impurity particles at the stage of sedimentation to become large-sized agglomerates and settle in the settling tank section 51. This set agglomerate is the spiral blade of the agglomerate discharge conveyor 52.
It is transferred upward by 55, dropped from an upper aggregate discharge port (not shown) into a lower aggregate collection container (not shown), and is reused.

On the other hand, the liquid L sucked into the filter plate 24 overflows the upper end of the dam plate 27 through the annular recess 26, and flows back into the outer tank 10 through the liquid outlet 42 and the liquid take-out pipe 43. In this way, the liquid is circulated between the inside of the outer tank 10 and this device, and the filtering is continued, so that the impurity particles in the liquid are gradually separated and precipitated.

The height of the cylindrical dam plate 27 keeps the liquid level flowing into the processing tank main body 11 at a certain level or more and secures a predetermined filtration area of the filtration plate 24. That is,
Even when the flow rate into the processing tank main body 11 is small, a filtration area corresponding to at least the height of the dam plate 27 is secured. This prevents the filtering function of the filter plate 24 from concentrating on a small area, improves the filtering performance when separating the impurity particles from the liquid, and prevents clogging of the filter plate 24.

At the same time, the liquid jetting body 31 of the backwash mechanism 20 jets the liquid supplied from the small diameter pipe 18 branched from the large diameter pipe 13 obliquely from the nozzles 36 of the arm pipes 35 on both sides. , And swirls in the same direction as the swirling flow of the liquid L.

That is, the liquid ejecting body 31 ejects the liquid from the nozzle 36 to the filter plate 24 while swirling along the inner peripheral surface of the filter plate 24, and looks like aluminum chips adhering to the outer peripheral surface of the filter plate 24. Effectively acts on such relatively light impurity particles,
The impurity particles are separated and removed by a backwash flow in the opposite direction to the inward flow of the liquid L. The impurity particles thus separated from the filter plate 24 settle on the bottom of the processing tank body 11.

As described above, since the filter plate 24 is always prevented from being clogged by the backwash flow from the liquid ejecting body 31, it is not necessary to perform maintenance for eliminating the clog for a long period of time.

[0046]

According to the invention of claim 1, the weir plate is concentrically arranged inside the filter plate via the annular recess, and the liquid flowing into the filter plate overflows the weir plate and is taken out. Since it is taken out to the outside by a pipe, the height of the weir plate ensures a certain filtration area in the filtration plate, and therefore, even when the flow rate of the liquid is small, at least a filtration area equivalent to the height of the weir plate is secured. Therefore, it is possible to prevent the filtering function of the filter plate from concentrating on a small area, improve the filtering performance, and effectively prevent clogging of the filter plate, thus reducing the burden of maintenance.

According to the second aspect of the invention, since the liquid jetting body for jetting the liquid to the filter plate is provided so as to swirl along the inner peripheral surface of the filter plate, the liquid is jetted to the filter plate while swirling. By the backwash flow of the liquid jet, it is possible to effectively separate and remove the impurity particles adhering to the outer peripheral surface of the filter plate. Especially, the impurity particles such as relatively light metal powder such as aluminum chips are effectively removed from the filter plate. Can be removed, clogging of the filter plate can be prevented for a long time, and the burden of maintenance can be reduced.

According to the third aspect of the invention, the liquid is filtered while swirling along the filter plate while ensuring a constant filtration area in the filter plate by the height of the weir plate disposed inside the filter plate. The liquid jet ejected onto the plate effectively separates and removes the relatively light metal powder and other impurity particles adhering to the outer peripheral surface of the filter plate by backwashing flow in the opposite direction to the liquid, thus clogging the filter plate. It can be prevented for a long period of time, and the burden of maintenance can be reduced.

According to the fourth aspect of the invention, the backwashing flow is ejected from the nozzle provided obliquely in the direction opposite to the swirling direction with respect to the radial direction, and the backwashing is performed while swirling the liquid jet body without power. Impurity particles can be removed by the flow, and the swirling structure of the liquid ejector can be simplified, and energy is not required to operate the liquid ejector.

[Brief description of drawings]

FIG. 1A is a sectional view showing an embodiment of a liquid processing apparatus according to the present invention, and FIG. 1B is a plan view showing a liquid ejecting body thereof.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a perspective view showing the whole of the same liquid processing apparatus.

[Explanation of symbols]

 L liquid 11 Processing tank main body 15 Liquid inlet 23 Liquid swirl space 24 Filter plate 26 Annular recess 27 Dam plate 31 Liquid ejector 36 Nozzle 43 Liquid extraction pipe

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B01D 29/42 501C

Claims (4)

[Claims] 1. A liquid processing apparatus for separating and removing impurity particles from a liquid, comprising: a cylindrical processing tank main body having a liquid introducing port for introducing the liquid from a tangential direction and a precipitation tank portion at a bottom; A bottomed cylindrical filter plate concentrically arranged with respect to the processing tank body through a liquid swirling space in which the liquid swirls inside the processing tank body, and a filter plate with an annular recess inside the filter plate. A liquid treatment apparatus comprising: a concentrically-arranged cylindrical weir plate having an opened upper surface; and a liquid take-out pipe for taking out liquid from the inside of the weir plate to the outside of the treatment tank body. 2. A liquid processing apparatus for separating and removing impurity particles from a liquid, comprising a cylindrical processing tank body having a liquid inlet for introducing the liquid from a tangential direction and a precipitation tank portion at the bottom, A cylindrical filter plate with a bottom, which is concentrically arranged with respect to the processing tank body through a liquid swirling space in which the liquid swirls inside the processing tank body, and is provided so as to be rotatable along the inner peripheral surface of the filter plate. A liquid processing apparatus comprising: a liquid jetting body for jetting the liquid onto the filter plate; and a liquid take-out pipe for taking out the liquid from the inside of the filter plate to the outside of the processing tank body. 3. A liquid processing apparatus for separating and removing impurity particles from a liquid, a cylindrical processing tank main body having a liquid introducing port for introducing the liquid from a tangential direction and a precipitation tank portion at a bottom, A bottomed cylindrical filter plate concentrically arranged with respect to the processing tank body through a liquid swirling space in which the liquid swirls inside the processing tank body, and a filter plate with an annular recess inside the filter plate. A cylindrical weir plate that is concentrically arranged and has an open upper surface; a liquid jetting body that swirls in an annular recess between the filter plate and the weir plate and that jets liquid to the filter plate; A liquid processing apparatus comprising: a liquid take-out pipe for taking out a liquid from the inside of the plate to the outside of the processing tank main body. 4. The liquid processing apparatus according to claim 2, wherein the liquid jetting body is provided with a nozzle obliquely to the radial direction in a direction opposite to the swirling direction.