JP5070025B2 - Cleaning device - Google Patents

Description

  The present invention relates to a cleaning apparatus, and more particularly to a cleaning apparatus having a structure in which a gas-liquid mixture of cleaning water and gas is jetted from an injector and suitable for cleaning a large number of small machine parts.

Organic cleaning agents such as chlorofluorocarbon solvents, petroleum solvents, and lower organic solvents have been widely used in the field of industrial cleaning since they have a high cleaning effect on fat and oil stains. However, as a result, it became clear that the disposal of these organic solvents after washing into the natural environment causes environmental problems that destroy the ozone layer and contaminate water systems such as groundwater, rivers, and the ocean. For this reason, for the purpose of reducing the environmental load, the development of a cleaning technique using water or a cleaning liquid mainly composed of water instead of these organic cleaning agents is currently in earnest.

  For example, in cleaning using an alkaline cleaning liquid that dissolves oil as the cleaning liquid, in order to obtain a stable cleaning power, steady generation of fine vibrations by the ultrasonic vibrator provided at the bottom of the cleaning tank and dissolution of the oil in the cleaning liquid Periodic liquid replacement was required to meet the decline in capacity. In particular, the latter has a problem that the cleaning power gradually decreases as the oil concentration of the cleaning liquid increases because the oil adhering to the object to be cleaned is removed by being dissolved in the alkaline cleaning liquid. Further, the alkaline cleaning liquid itself is a deleterious substance, and there are problems of handling and disposal of waste liquid after cleaning, which increases the environmental load.

  On the other hand, in Patent Document 1 described later, there is a cleaning method for improving cleaning efficiency by causing cavitation to occur by collision of high-speed bubbles by spraying fine bubbles on an object to be cleaned in cleaning with cleaning water mainly composed of water. It is disclosed.

  Patent Document 2 discloses a method of improving the cleaning efficiency by generating ultrasonic waves in water and vibrations of bubbles generated in the water or shock waves generated when the bubbles are collapsed.

  Patent Document 3 discloses a cleaning technique in which a gas-liquid mixture of cleaning water and gas containing a small amount of an organic solvent is ejected from an ejector.

  By the way, the techniques disclosed in Patent Documents 1 to 3 generally require a large amount of cleaning water in order to enhance the cleaning effect and cleaning stability. As a result, there are facilities and apparatuses for stably supplying a large amount of cleaning water. In addition to being necessary, water and soot may need to be detoxified with cleaning water containing filth after cleaning, so it is a major challenge to increase the cleaning effect while using as little cleaning water as possible. It has become.

JP-A-7-138796 (Pages 2 and 3, FIGS. 1-4) Japanese Patent Laid-Open No. 4-66177 (pages 2 and 3, FIG. 1-3) JP 2004-283683 A (paragraph numbers 0013 to 0017, FIG. 1)

  The inventors of the present invention generate acid bubbles in washing water mainly composed of water, and improve the washing efficiency, thereby reducing the amount of washing water and acid or alkaline solvents compared to the conventional case. We have developed a cleaning technology that achieves a cleanliness level comparable to the cleaning technology that uses and that maintains stable cleaning performance for a long period of time.

  In order to meet the above-mentioned demands in the field, the present invention reduces the amount of cleaning water used as an environmental load by improving the cleaning efficiency, and further reduces the cost required for processing the cleaning water after cleaning. This is a problem.

The cleaning apparatus according to the present invention has a structure in which cleaning water can freely flow in and out, and includes a cleaning tub that accommodates a plurality of objects to be cleaned, a rotating device that rotates the cleaning tub, and the covering of the cleaning tub. At least two injectors that are dispersedly arranged to inject a gas-liquid mixture of cleaning water and gas toward the receiving and spraying surface on which the cleaning body is gathered, disposed above the cleaning tank, and the surface of the cleaning water A water supply device for flowing out water from the cleaning tank and collecting the washed water flowing out from above the washing tank and collecting the washed water by using a weight difference. A separation / separation tank that separates the washing water into a washing water, and a washing water refeeding device that re-feeds the washing water separated in the collection / separation tank to each of the injectors. Volume at ° C Above 1 atmosphere gas, it is assumed that volume in 20 ° C. injects gas-liquid mixture is from 0.2 to 2, as the flow velocity of the collision with the receiving injection cage surface is at least 3 mm / sec for, In addition, the injection is stopped or weakened in the latter half of the cleaning time .

Cleaning apparatus according to the present invention, the configuration described above, washable the object to be cleaned effectively by the use of a small amount of the gas-liquid mixture, and since it can be a small amount the amount of the gas-liquid mixture Further, the cost for the apparatus for the subsequent processing and the operation is reduced.

Embodiment 1 FIG.
1 to 4 illustrate the first embodiment of the present invention. FIG. 1 is a schematic view showing the entire cleaning apparatus of the first embodiment, and FIG. 2 is an enlarged view of a part of FIG. 3 is a perspective view, FIG. 3 is an explanatory view of a cleaning water resupply device, and FIG. 4 is an enlarged front view of a part of FIG.

In FIG. 1, the cleaning apparatus of the first embodiment includes a cleaning tank W, a rinsing tank R, a drying tank D, and a moving device T as main parts. The tank W, the tank R, and the tank D are each openable, and each tank W
, R, and D each have a frame F for holding the cleaning basket B in a rotatable state. The cleaning basket B is shown in FIGS. 2 and 4 on the upper lid of each tank. A motor M that rotates in the direction of the arrow A shown is fixed. A plurality of injectors W1 shown in a simplified manner in FIG. 1 and shown in detail in FIGS. 2 to 4 are provided on the bottom wall of the cleaning tank W, and the cleaning water jet shown in a simplified form on the bottom wall of the rinsing tank R A device R1 is provided, and a wind injection device D1 such as hot air or warm air, which is simply shown, is provided on the bottom wall of the drying tank D. Further, the cleaning water resupply device shown in FIG. 3 is adjacently installed in the cleaning tank W. The cleaning water resupply device includes an overflow section W2, an overflow tank W3 as an example of the recovery separation tank, and a circulation pump W4. , A water branch manifold portion W5, an air introduction portion W6, and an air branch manifold W7.

  As shown in FIG. 2, the cleaning basket B is formed of a stainless steel wire net so that the cleaning water and the gas-liquid mixture can freely flow in and out, and the outside of the ceiling surface is as shown in FIG. A pair of handle plates B1 having long horizontal holes for movement by the moving device T (see FIG. 1) are fixed, and the handle plates B1 are attached to the four side surfaces of the cleaning bowl B together with the ceiling surface. It is removable. The cleaning basket B is stored in the frame F in a state where it can be inserted and removed. In FIG. 1, the cleaning basket B is indicated by a solid line before being inserted into the frame F by the moving device T, and is indicated by a dotted line after being inserted into the frame F.

  As shown in FIGS. 2 and 4, the frame F includes a bottom surface F <b> 1 and four members F <b> 2 to F <b> 5, but the ceiling surface is omitted for insertion and removal of the cleaning basket B. Of the four members, the members F3 and F5 are columnar members, and the members F2 and F4 have a structure having a narrow reinforcing beam, so that the frame F has a shape that facilitates the passage of cleaning water. Have. A rotating shaft M1 that rotates the entire frame F in the direction of arrow A (see FIGS. 2 and 4) or the opposite direction is fixed to F2 and F4. Each other end of the rotating shaft M1 is A bearing (not shown) fixed to the side wall of the cleaning tank W is rotatably held. The rotating shaft M1 is rotated by the motor M via the belt M2 in the direction of the arrow A while the cleaning rod B is housed inside the frame F. A dotted circle shown in FIGS. 1, 2 and 4 represents a locus when the frame F rotates around the rotation axis M1.

  Although the frame F is easy to insert and remove the cleaning rod B, its inner dimensions are such that the cleaning rod B does not rattle substantially after the cleaning rod B is inserted and rotated. Each of the members F2 and F4 is formed of a material that does not obstruct the free inflow and outflow of the washing water and the gas-liquid mixture into the washing basket B, for example, a stainless wire net, a stainless perforated plate, etc. ing. The two members F3 and F5 are formed of stainless steel squares.

  The rinsing tank R and the drying tank D have substantially the same structure as the cleaning tank W, and are each provided with a frame F that rotatably holds the cleaning basket B. However, the rinsing tank R is provided with a cleaning basket B which has been cleaned in the cleaning tank W and a rinsing water jetting device R1 for rinsing the contents (object to be cleaned). There is provided a wind spraying device D1 for spraying hot air or hot air for drying the cleaning basket B rinsed and rinsed in the rinsing tank R and its contents. Both the rinsing water injection device R1 and the wind injection device D1 may be the same as the prior art.

  Next, the operation of the cleaning apparatus of the first embodiment will be described. First, an article to be cleaned (hereinafter referred to as an object to be cleaned) is put into the cleaning bowl B. Examples of the object to be cleaned include a copper-based press-processed product and a cut-processed product, and an iron-based press-processed product and a cut-processed product. They are attached to the press oil, cutting oil used at the time of processing, and further processing powder generated at the time of processing, and the present invention is suitable for removing these deposits. There is no particular limitation on the amount of the object to be cleaned to be put into the cleaning bowl B at that time, but if the amount is too large, the amount of movement of the object to be cleaned in the cleaning bowl B also by the rotation of the cleaning bowl B However, there is a problem that the object to be cleaned located around the center of the cleaning basket B has a low chance of coming into contact with the gas-liquid mixture and the degree of cleaning decreases. On the other hand, if the input amount is too small, the effective utilization rate of the cleaning basket B decreases. Therefore, the input amount of the object to be cleaned is preferably 10% to 80%, particularly 20% to 50% of the total volume of the cleaning basket B.

  In FIG. 1, when the object to be cleaned is inserted into the cleaning basket B, the ceiling surface is fixed to the four side surfaces, and is moved onto the cleaning tank W by the moving device T via the handle plate B1. . Next, the upper lid of the cleaning tank W is opened, and the cleaning basket B is inserted and fixed in the frame F in the cleaning tank W, the upper lid of the cleaning tank is fixed in a predetermined position, and then the arrow A or the opposite direction by the motor M. Is rotated together with the frame F.

  The object to be cleaned in the cleaning basket B moves in the cleaning basket B by the rotation of the cleaning basket B, and the cleaning basket B is in the state shown in FIGS. 2 and 4, that is, one surface of the cleaning basket B is cleaned. When the tank W is in a state parallel to or close to the bottom surface of the tank W, most of the objects to be cleaned gather on the one surface. In addition, two or more injectors W1 are dispersedly arranged so as to inject the gas-liquid mixture toward the one surface of the cleaning tub B (hereinafter, the one surface is referred to as a receiving / injecting ridge surface B2). For example, in FIG. 2, six injectors W1 are distributed and arranged in two rows. In the present invention, the injection of the gas-liquid mixture from each injector W1 may be continuous or intermittent regardless of the position of the receiving and injection surface B2.

In the present invention, there is no particular limitation on the shape and area of the receiving / injecting saddle face B2, but from a practical point of view, the shape is a square, a rectangle, a trapezoid, a triangle, etc. Although it depends on the size and single washing number, a 100cm ² ~5000cm ² taking normal stampings or cutting products in examples. In this case, the height of the cleaning basket B is 10 cm to 300 cm.

  Next, a general method of distributing and arranging a plurality of injectors W1 with respect to various shapes of the receiving and injection saddle surface B2 will be described. Ideally, it is natural that the gas-liquid mixture injected from the plurality of injectors W1 preferably collides with the entire surface of the receiving and injection ridge surface B2 without excess or deficiency, but from the injector W1. In many cases, the shape of the injection is conical or close to it, so in practice this is impossible or difficult, and a certain part of the receiving injection surface B2 is an injection from a plurality of injectors W1. Objects may overlap and some other locations may become uninjected.

  However, in the present invention, even if there is such non-uniformity of injection, the object to be cleaned freely moves in the cleaning basin B by the rotation of the cleaning basin B. The degree of cleaning becomes substantially uniform over time. Note that the degree of substantial uniformity varies depending on the degree of cleaning required for the object to be cleaned, the mobility of the object to be cleaned in the cleaning bowl B, the injection amount from the injector W1, or other factors. If these factors are fixed, it is possible to set cleaning conditions for obtaining a substantially uniform degree by trial and error. Therefore, in the present invention, the plurality of injectors W1 may be arranged in a distributed manner so that the injectors W1 are generally spread over the receiving and injection saddle surface B2. The rotation speed and the number of rotations of the cleaning bowl B depend on the degree of difficulty in cleaning the dirt component adhering to the body to be cleaned, the amount of the body to be cleaned in the cleaning bowl B, the injection amount of the gas-liquid mixture from the injector W1, etc. Although different, in general, the rotation speed is suitably 3 to 6 rpm, and the total number of revolutions until the end of washing is suitably 10 to 20 times.

In consideration of the above circumstances, for example, when two injectors W1 are dispersedly arranged on the square receiving / receiving surface B2, they are installed at equal intervals on a square diagonal line. When there are three injectors W1, they are installed so as to draw a triangle at regular intervals around the center of the square. When the number of injectors W1 is 6, two rows of 3 × 3 are arranged as shown in FIG. 2, and when the number of injectors W1 is 7, any of the two rows of arrangements in FIG. Individual. When the said receiving / injection saddle surface B2 is a rectangle and there are three injectors W1, it installs at equal intervals on the diagonal of a rectangle. When the receiving / injecting saddle surface B2 is rectangular and the number of injectors W1 is seven, three rows and four rows are provided as in the case of the square. Even when the receiving and spraying surface B2 has a shape other than a square or a rectangle, it may be arranged to be as uniform as possible with the same feeling as in the case of a square or a rectangle.

2 is generally 10 mm to 150 mm, preferably 60 mm to 150 mm, as will be mentioned later in the embodiment. In the state shown in FIG. 130 mm. In that case, it is not necessary to make the height of the jet outlet of each injector W1 with respect to the said receiving / injection saddle surface B2, and there may be some irregularities, but the degree of irregularity is preferably 5 mm or less, particularly preferably 2 mm or less. .

  A gas-liquid mixture is sprayed from each of the plurality of injectors W1 toward the cleaning bowl B, and the jetting surface B2 of the cleaning bowl B and the object to be cleaned located on the cleaning bowl B are thereby ejected from the gas-liquid mixture. Washed with the mixture. The state of this cleaning is shown in FIG. In FIG. 4, white circles indicate bubbles contained in the gas-liquid mixture, which are normally colorless and transparent until they collide with the receiving and spraying surface B2, but gradually pass through the cleaning basket B. Coloring becomes opaque. At this time, since the cleaning basket B rotates, the object to be cleaned moves in the cleaning basket B, so that all the objects to be cleaned in the cleaning basket B are uniformly cleaned by this movement.

  The gas-liquid mixture injected from the injector W1 into the cleaning tank W rises in the cleaning tank W, and the bubble portion gradually merges during that time, and the surface layer in the cleaning tank W contains a large amount of contaminants. Wash water exists, and they are transferred to the overflow tank W3 via the overflow part W2, as shown in FIG. There, the contaminants and cleaning water are separated due to the difference in specific gravity, and a cleaning water layer containing a larger amount of contaminants is formed on the surface. There is less wash water, which is reused as follows.

In FIG. 3, the air taken in from the air introduction part W6 is sent to the injector W1 via the air branch manifold W7, while the cleaning body water separated in the overflow tank W3 is supplied to the circulation pump W4 and It is sent to the injector W1 via the water branch manifold W5, and a gas-liquid mixture composed of air and washing water is jetted into the washing tank W from the injector W1. New air is always introduced and used, but wash water is circulated. Such circulation of washing water eliminates the need for regeneration purification of washing water, which was necessary in the prior art, or even if it is recycled for a certain period of time and then regenerated, the frequency of the regenerating process is greatly increased. There is an effect that can be reduced.

In the present invention, the gas in the gas-liquid mixture may be air, nitrogen, oxygen, hydrogen, carbon dioxide, argon, or other chemically stable gases. Those gases may contain 0.01 to 10% by volume of ozone. As washing water, in addition to the separated water recovered from the overflow tank W3 by the method described above, tap water, rain water, clean river water, distilled water, ion exchange water, etc. are used. It may contain a compound. By containing the water-soluble organic compound, it is easy to prevent fusion of bubbles in the gas-liquid mixture, and it is easy to form a gas-liquid mixture in which fine bubble particles are well dispersed by injection from the injector W1. There is an effect. The water-soluble organic compound is not particularly limited as long as it is water-soluble, but alcohols, organic acids, esters, and ketones are particularly preferable, and two or more of them may be used in combination.

  In the gas-liquid mixture injected from the injector W1 into the washing tank W, if the gas content is too small, the amount of microbubbles generated is small, and when a large amount of oil is contained, the oil can be separated in a short time. If the content is excessive, there is a problem that a large amount of foam is generated due to the influence of the surfactant contained in the oil. Therefore, the gas content in the gas-liquid mixture is 0.2-2, preferably 0.4-1. 8, in particular 0.5 to 1.5. If the size of the bubble when the gas-liquid mixture injected from the injector W1 collides with the object to be cleaned is too small, the buoyancy of the bubble will decrease, so the oil adhering to the surface will rise to the water surface quickly and be separated. If the surface of the object to be cleaned has irregularities or holes, air bubbles cannot reach. Accordingly, the size of the bubbles is 5 μm to 1000 μm, preferably 50 μm to 500 μm, as an average value measured by a method of actually measuring the bubble diameter from a high magnification camera image, and the size of the bubbles is the injector W1. It can be determined by trial and error by adjusting the gas-liquid mixing part diameter and the amount of the gas-liquid mixture supplied to the injector W1.

In the first embodiment, the injector W1 that generates air bubbles by mixing air and cleaning water to be circulated is disposed in the lower portion of the cleaning tank W. The amount of the cleaning liquid water or gas-liquid mixture in the inside, the capacity of the cleaning bowl B rotating in the cleaning tank W), the distance from the injection port of the injector W1 to the receiving and spraying surface B2 of the cleaning bowl B, the injector W1 There is an appropriate relationship between the number of installations and their arrangement pitch, the amount of the gas-liquid mixture supplied to the injector W1, the quantity ratio of washing water and gas in the gas-liquid mixture, by setting the range, give a good cleaning state with less gas-liquid mixture, as described below, for example, the cleaning object adhered oil amount is about 100μg / cm ³ ~1000μg / cm ³ before washing Wash on subject It was confirmed that it can be reduced to 10 μg / cm ^{3 to} 50 μg / cm ³ or less by washing with the washing apparatus of the first embodiment. Therefore, the effect of using at least two injectors W1 in the present invention will be described in more detail with reference to the second embodiment and the comparative example.

Embodiment 2. FIG.
The cleaning apparatus shown in FIGS. 1 to 4 was used. However, the cleaning bowl B is a cube having a receiving and spraying face B2 of 220 mm × 250 mm and a height of 200 mm, and two injectors W1 were used. The two injectors W1 were installed on the bottom surface of the cleaning tank W and at positions immediately below each of the two points that equally divide the diagonal line of the receiving and spraying surface B2 of the cleaning basket B. An iron-based press-processed product to which a mineral oil-based press working oil having a kinematic viscosity at 40 ° C. of about 45 mm ² / sec is attached (average thickness: about 2 mm, average length: about 5 cm: average total surface area) : About 17.6 cm ² , average oil adhesion before washing: 150 μg / cm ² ). The oil adhesion amount before washing was calculated from the oil amount obtained by deoiling using reagent-grade toluene as a deoiling agent in the laboratory and the average total surface area of the object to be cleaned. In the following, a value obtained by dividing the amount of adhered oil that has not been removed even after cleaning and remains on the object to be cleaned by the total surface of the object to be cleaned is referred to as a residual oil amount (μg / cm ² ).

An amount of 20% by volume of the internal volume of the cleaning bowl B is added to the press-processed product, and the tap water is used as the cleaning water from each of the two injectors W1, and the volume of the cleaning water is 20
A gas-liquid mixture having an air volume of 1 converted to 1 ° C. at a temperature of 1 ° C. was injected so that the average flow rate at the time of collision with the receiving injection surface B2 was 30 mm / second. At that time, the cleaning basket B was rotated at a rotation speed of 3 rpm. After such washing is continued for 4 minutes, the rotation of the washing basket B and the injection from the injector W1 are stopped, the washing basket B is rinsed under normal conditions, dried, and thus cleaned. A processed product (residual oil content: 25 μg / cm ² ) was obtained. The total amount of tap water required for the above washing was 80 liters.

Comparative Example 1
The same method as in the second embodiment, except that one injector W1 is used, and this is installed on the bottom surface of the cleaning tank 1 and at a position just below the center of the receiving / injecting scissor surface B2 of the cleaning scissor B. In addition, an iron-based pressed product that was washed under the conditions was obtained. The residual oil content was 110 μg / cm ² ) and was still insufficiently washed. Therefore, when the cleaning degree in Comparative Example 1 was continued until the cleaning degree was the same as that in the second embodiment, the residual oil amount was 60 μg / cm ² even when 150 liters or more of cleaning water was used. No improvement in cleanliness was observed. From this, it became clear that it is more effective to use two injectors W1 than the conventional one.

Regarding the obvious difference in cleaning power between the embodiment 2 and the comparative example 1 due to the difference in the number of injectors W1 used, the present inventors increased the number of injectors W1 so that the objects to be cleaned and the injectors Based on the reason that the cleaning liquid can be made to reach the object to be cleaned evenly and the surface oil can be separated more easily by colliding with the object to be cleaned at a high flow rate of the cleaning liquid. For this reason, the injector W1 is further increased, and it is considered that this is also the reason for further improvement of the cleaning power in the embodiment described later.

Embodiment 3 FIG.
The same cleaning apparatus as in Example 1 except that a gas / liquid mixture obtained by using tap water in which 0.5% by mass of an alcohol-based additive was dissolved was used instead of the gas / liquid mixture used in the second embodiment. In addition, an iron-based pressed product (residual oil content: 25 μg / cm ² ) cleaned under the cleaning conditions was obtained with a cleaning time of 2 minutes, that is, a cleaning liquid amount of 40 liters. As a result, it was confirmed that the cleaning effect was further improved when added to normal tap water.

  Next, Embodiment 4 and Embodiment 5 aiming at shortening the cleaning time and improving the degree of cleaning in the present invention will be described.

Embodiment 4 FIG.
The operating conditions of the cleaning device, the object to be cleaned, and the cleaning device are the same as those in the second embodiment, except that the number of injectors W1 is four, and these are the receiving and injection surface B2 of the cleaning bag B Was placed at a position directly below each center of a quadrilateral that was divided into four equal parts, and cleaning bowl B was rotated at 3 rpm. The amount of water per minute contained in the total amount of the gas-liquid mixture ejected from the four injectors W1 is changed from 40 liters / minute to 100 liters / minute, and the washing time is 10 seconds, 30 seconds. And cleaning for 60 seconds. The results are shown in FIG. 5 with the cleaning time as a parameter.

  From the graph of FIG. 5, it can be seen that the greater the amount of cleaning water per minute and the longer the cleaning time, the smaller the amount of residual oil in the object to be cleaned and the higher the degree of cleaning. Further, it can be seen from FIG. 5 that as the amount of water increases, the amount of residual oil decreases, which is an advantageous direction in terms of improving the degree of cleaning. However, since a large amount of washing water is used, a large circulation pump and a washing tank W corresponding to the washing water are required, resulting in a problem that the scale of the apparatus itself is increased.

Embodiment 5 FIG.
The same cleaning device as that of the fourth embodiment is used, except that the distance from the injection port of each injector W1 to the receiving injection surface B2 of the cleaning basket B is changed so that the gas-liquid mixture from each injector W1 is received and injected FIG. 6 shows the result of investigating the relationship with the flow velocity (mm / second) when colliding with the surface B2. From the graph of FIG. 6, it can be seen that it is better to bring each injector W1 closer to the receiving and injection saddle surface B2 in order to cause the gas-liquid mixture to collide with the receiving and injection well surface B2.

However, the region that can be cleaned by one injector W1 is that the jetted gas-liquid mixture has a spread angle, so that it is possible to clean a wider region by increasing the distance to the receiving and injection surface B2. It becomes possible. When the above relationship is expressed by a mathematical expression, the opening diameter of the jet outlet of the injector W1 is Φ ₀ , the flow velocity of the ejected matter at the jet outlet is V ₀ (mm / sec), and the above-described receiving jet from the jet outlet of the injector W1 If the distance to the surface B2 and the H (mm), V ₁ the flow rate of the gas-liquid mixture at the time of collision of the receiving injection cage surface B2 _(mm / sec), the flow rate of the gas-liquid mixture with the diffusion of the gas-liquid mixture Decrease. Assuming that the spread angle of the gas-liquid mixture is θ, the relationship between the distance to the receiving and spraying surface B2 and the flow velocity can be expressed by the following formula 1.

_{V 1 = V 0 (Φ 0} /2) 2 / {(Φ 0/2) 2 + Φ 0 Htanθ + (Htanθ) 2} (1)

The flow velocity _{V 1} to a constant 30 mm / sec, when the width 220 mm × depth 250mm size now washing baskets B, the distance from the ejection port of the injector W1 to receiving the injection cage surface B2 H (mm) FIG. 7 shows the relationship between the number of injectors, FIG. 8 shows the relationship between the distance H (mm) from the injection port of the injector W1 to the receiving injection surface B2, and the total flow rate, and FIG. 9 shows the relationship between the number of injectors and the total flow rate. Respectively. From these results, it can be seen that in order to reduce the total flow rate, the number of injectors is 4 to 10, and the distance from the injection port of the injector W1 to the receiving and receiving flange surface B2 may be 60 mm to 130 mm.

Embodiment 6 FIG.
FIG. 10 is a schematic front view of the sixth embodiment, and the cleaning basket B has a donut shape (or a cylindrical shape) and rotates around a rotation axis M1 passing through the center of the donut hole. Both ends of the rotating shaft M1 are rotatably fixed to a bearing (not shown) fixed to the side wall of the cleaning tank W, and a portion passing through the inner hole of the rotating shaft M1 is the above-mentioned center of the cleaning bowl B. It is fixed to the cleaning basket B by a plurality of columns B3 extending radially from the surface where the hole is formed. A plurality (three are shown in FIG. 10) of injectors W1 are installed on the bottom surface of the cleaning tank W. In the sixth embodiment, since the lower surface of the doughnut-shaped cleaning bowl B in the figure is the receiving injection bowl face B2, the gas-liquid mixture is jetted from each injector W1 toward the lower face as shown in the figure. Is done.

  Now, if the width of the cleaning bowl B, that is, the width of the receiving and spraying face B2 is L, the number of injectors is N, and the width of injection on the receiving and jetting face B2 from each injector is P, N pieces The injectors W1 may be installed in parallel at equal intervals so that L = NP. FIG. 10 illustrates a state in which three injectors W1 having an injection width P are installed in parallel at intervals. In this case, the receiving / injecting soot surface B2 always receives and injects the gas-liquid mixture uniformly over the entire surface, so that the cleaning time can be shortened.

Embodiment 7 FIG.
FIGS. 11 to 13 are for explaining the seventh embodiment. When the cleaning apparatus shown in FIG. 10 is used for cleaning, the oil component floated and separated on the surface of the cleaning water in the cleaning tank W This will be explained with reference to the overflow mechanism that promptly collects. The water supply device W8 has a function of causing water to flow on the surface in the direction of the arrow to move the oil in the direction of the arrow X (the same in the following FIGS. 12 to 15) and moving it into the overflow tank W3 (see FIG. 3). Make. As the water supplied to the water supply device W8, for example, the circulating water from the circulation pump W4 shown in FIG. 3 is used. In FIG. 11, when a part of the cleaning basket B is rotated upward from the water surface in the cleaning tank W as shown in FIG. 12, there is a problem that the oil on the water surface is reattached. In such a case, as shown in FIG. 13, by setting the rotation diameter of the cleaning basket B so as not to contact the oil content layer in the cleaning tank W, the oil that has floated up is reattached to the cleaning object or the cleaning basket B. Can be prevented.

Embodiment 8.
14 and 15 illustrate the eighth embodiment. FIG. 14 is an explanatory view showing a state in the vicinity of the water surface in the cleaning tank W being cleaned in FIG. 13, for example, in which the oil separated from the object to be cleaned is surrounded by bubbles rising in the vicinity of the water surface and on the water surface. Is forming. In the state where the microbubbles are generated from the injector W1, the flow of feeding the oil layer to the overflow tank W3 side and the upward flow indicated by the thick arrow Y including the microbubbles from the injector W1 collide to separate the oil component May be prevented from moving to the overflow tank W3. In such a case, as shown in FIG. 15, in the latter half of the cleaning time, the injection from the injector W1 is stopped, or, as indicated by the thin arrow Z, the oil layer moves smoothly by reducing the flow rate of the injection. be able to.

Embodiment 9.
FIG. 16 illustrates the ninth embodiment. In addition to the method in the seventh embodiment and the eighth embodiment relating to the stable movement of the oil layer on the water surface in the cleaning tank to the overflow tank W3, overflow occurs from the entire circumference in the cleaning tank W as shown in FIG. In addition, the oil layer can be efficiently separated by adjusting the injection amount from the injector W1.

  The cleaning device of the present invention is used for cleaning of press-type machined oil, machine-processed oil, or copper-type press-processed or cut-processed products, iron-type press-processed or cut-processed products, etc. to which processing powder adheres. Is preferred.

1 is a schematic diagram showing the entirety of Embodiment 1. FIG. FIG. 2 is an enlarged perspective view of a part of FIG. 1. It is explanatory drawing of the washing water resupply apparatus in Embodiment 1. FIG. FIG. 2 is an enlarged front view of a part of FIG. 1. 10 is a graph showing the relationship between the injection amount of the gas-liquid mixture and the amount of residual oil in Embodiment 4. It is a graph which shows the relationship between the distance from the injection nozzle of each injector in Embodiment 5, and the flow velocity when it collides with the receiving / injection soot surface B2 of the cleaning soot. 10 is a graph showing the relationship between the distance from the ejection port of each injector in Embodiment 5 to the receiving and spraying surface of the cleaning basket and the number of injectors. It is a graph which shows the relationship between the distance from the injector jet outlet in Embodiment 5, and a receiving injection soot surface, and a total flow rate. It is a graph which shows the relationship between the number of injectors in Embodiment 5, and a total flow rate. FIG. 10 is a schematic front view of a cleaning device in a sixth embodiment. FIG. 10 is a schematic front view of a cleaning device in a seventh embodiment. It is explanatory drawing explaining the problem of FIG. FIG. 20 is a schematic front view of another cleaning device in the seventh embodiment. FIG. 20 is an explanatory diagram of a cleaning device in an eighth embodiment. FIG. 20 is another explanatory diagram of the cleaning device in the eighth embodiment. FIG. 10 is an explanatory diagram of a cleaning device in a ninth embodiment.

Explanation of symbols

W: Cleaning tank, W1: Injector, W2: Overflow part,
W3: overflow tank, W4: circulation pump, W5: manifold for water branch,
W6: Air introduction part, W7: Air branch manifold part, R: Rinse tank,
R1: rinsing water jetting device, D: drying tank, D1: wind jetting device, T: moving device, B: cleaning bowl, B1: handle plate, B2: receiving jetting face, B3: strut, F: frame, F1: bottom surface, F2 to F5: side surface, M: motor, M1: rotating shaft, M2: belt.

Claims (1)

A washing basket having a structure in which washing water can freely flow in and out and accommodates a plurality of objects to be washed, a washing tank in which the washing bowl is installed, a rotating device that rotates the washing bowl, and the washing bowl At least two injectors arranged in a dispersed manner for injecting a gas-liquid mixture of cleaning water and gas toward the receiving and spraying surface where the objects to be cleaned are gathered, disposed above the cleaning tank, and cleaned A water supply device that causes water to flow on the surface of the water and causes the contaminated components floating on the surface to flow out of the cleaning tank. The cleaned water that flows out from above the cleaning tank is recovered and the washed water is recovered using a weight difference. A separation / separation tank that separates the components into a dirty component and washing water, and a washing water refeeding device that re-feeds the washing water separated in the collection / separation tank to the injectors,
Each of the injectors has a gas-liquid mixture in which the volume of the gas is 1 atm and the volume at 20 ° C. is 0.2 to 2 with respect to the volume 1 at 20 ° C. of the washing water at the time of collision with the receiving and injection surface. The cleaning apparatus is characterized in that the injection is performed so that the flow velocity is at least 3 mm / second , and the injection is stopped or weakened in the latter half of the cleaning time .

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