JPH08117709A - Cleaning device - Google Patents

Abstract

PURPOSE: To increase cleaning efficiency by respectively forming the submerged opposite faces of perforated plates having prescribed pores and filtrating a liquid of an organic solvent in a cleaning tank thoroughly, uniformly and rapidly. CONSTITUTION: Submerged opposite faces of a cleaning tank 2 storing an organic solvent A are respectively formed of perforated plates 5, 6. A liquid suction chamber 7 is formed liquid-tightly in the outside of the perforated plate 6 at the liquid suction side. A liquid feed chamber 8 is formed liquid-tightly in the outside of the perforated plate 5 at the liquid feed side. The interval between the chamber 7 and the chamber 8 is connected by a liquid feed route 13 in which a liquid-pressurizing feed pump 11 and a filter 12 are interposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for cleaning works such as miniature bearings and computer parts with an organic solvent (methylene chloride, hydrochlorofluorocarbon, etc.).

[0002]

2. Description of the Related Art Conventionally, as a cleaning apparatus of the above-mentioned example, there is one having a structure as shown in FIG. That is, a cleaning tank 31 is provided, and methyl chloride (methylene chloride; a chemical formula is CH ₂ Cl ₂ ) or hydrochlorofluorocarbon (Hydro Chloro Fluoro Ca) is provided in the cleaning tank 31.
While the organic solvent A such as rbons (so-called HCFC) is stored, the inlet port 32 and the outlet port 33 are opened at one side and the other side of the cleaning tank 31, and the pump 34 and the outlet port 33 are provided between these ports 33, 32. This is a cleaning device in which a filter 35 is connected by a liquid-sending path 36, and an ultrasonic vibrator 37 and a preheater 38 are attached to the bottom of the cleaning tank 31.

According to this conventional cleaning apparatus, when a work such as a miniature bearing or a computer part is immersed in the liquid of the organic solvent A from the work inlet / outlet 39 formed at the upper opening of the cleaning tank 31, the organic solvent A While there is an advantage that the work can be satisfactorily cleaned by the action of the solvent A and the ultrasonic vibration effect of the ultrasonic oscillator 37, the inflow and outflow of the organic solvent A to and from the cleaning tank 31 are partially (inlet port 32). However, since it is configured to enter through a portion of the outlet port 33 (see the outlet port 33), there is a problem that the waste liquid containing chips, dust, and the like cannot be removed.

[0004]

The invention according to claim 1 of the present invention forms the liquid of the organic solvent in the cleaning tank evenly by forming the facing surfaces in the liquid by perforated plates having predetermined pores. An object of the present invention is to provide a cleaning device capable of improving the cleaning efficiency by uniformly and rapidly filtering.

In the invention according to claim 2 of the present invention, in addition to the object of the invention according to claim 1, the pore size of the liquid absorption side porous plate is set to be slightly larger than the pore size of the liquid transmission side porous plate. By doing so, it is an object of the present invention to provide a cleaning device capable of ensuring a flow rate on the intake liquid side and preventing cavitation.

According to the invention of claim 3 of the present invention, in addition to the object of the invention of claim 1 or 2, by arranging the holes in the perforated plate uniformly throughout the liquid, It is an object of the present invention to provide a cleaning device capable of achieving better rapid filtration.

[0007]

According to a first aspect of the present invention, the facing surfaces in liquid of a cleaning tank in which an organic solvent is stored are formed by perforated plates, respectively, and liquid-tight on the outside of the perforated plate on the liquid absorption side. The liquid-sending chamber formed in the shape of a ring and the liquid-sending chamber formed in the liquid-tight state outside the liquid-sending side porous plate are connected by a liquid-sending path provided with a pressure-sending pump and a filter. It is a cleaning device.

In the invention according to claim 2 of the present invention, in combination with the structure of the invention according to claim 1, the pore size of the liquid-absorption side porous plate is set to be slightly larger than the pore size of the liquid-sending side porous plate. It is a cleaning device.

In the invention according to claim 3 of the present invention, in addition to the structure of the invention according to claim 1 or 2, the holes in each of the perforated plates are from the position corresponding to the bottom of the cleaning tank to the position corresponding to the liquid surface. The cleaning device is evenly arranged over the entire area.

[0010]

According to the invention described in claim 1 of the present invention, when the pressurized liquid feed pump is driven, the liquid feed chamber formed outside the liquid feed side porous plate of the cleaning tank passes through the porous plate. The organic solvent is pressurized and discharged into the cleaning tank. In other words, the pressurized organic solvent is discharged from a number of locations into the liquid in the cleaning tank,
The organic solvent in the cleaning tank is sucked into the suction side of the pressurized liquid feed pump through the suction side porous plate and the liquid suction chamber outside the suction side, and chips and dust are removed by the filter provided in the liquid feed path. It

As described above, since the facing surfaces in the liquid are formed by the perforated plates having the predetermined pores, the organic solvent discharged from the many positions on the liquid sending side is sucked from the many positions on the liquid sucking side,
There is an effect that the liquid of the organic solvent in the washing tank can be uniformly and rapidly filtered, and the washing efficiency can be improved.

According to the invention of claim 2 of the present invention,
In addition to the object of the invention described in claim 1, since the pore size of the liquid absorption side perforated plate is set to be slightly larger than the hole diameter of the liquid transmission side perforated plate, the liquid absorption side, that is, the suction side of the pressurized liquid supply pump. There is an effect that cavitation can be prevented by securing the flow rate in the. Incidentally, when the pore size of the liquid-absorption side porous plate is too small, it becomes difficult to secure the flow rate, but the present invention can solve this problem.

According to the invention of claim 3 of the present invention,
In addition to the effect of the invention described in claim 1 or 2, the pores in each of the perforated plates are evenly arranged over the entire area from the position corresponding to the bottom of the cleaning tank to the position corresponding to the liquid surface. The discharge liquid of the organic solvent discharged from each of the perforated plates into the liquid of the cleaning tank is uniformly discharged in the liquid of the cleaning tank over the entire area of the liquid, and is evenly distributed from the respective pores of the liquid-absorption side porous plate. It is absorbed. As a result, there is an effect that more favorable rapid filtration can be achieved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. The drawing shows a cleaning device, and in FIG. 1 and FIG.
This cleaning apparatus is provided with a bottomed box-shaped cleaning tank 2 in which a work inlet / outlet 1 is formed with a wide opening at the upper end, and in the cleaning tank 2, methylene chloride (methylene chloride) or HC
The organic solvent A such as FC is stored.

An ultrasonic transducer 3 and a preheater 4 are provided at the bottom b of the cleaning tank 2, and the organic solvent A is heated at 30 to 50 ° C. (however, as the organic solvent, for example, methylene chloride). (When using) is configured to be heated. This heating temperature is a temperature at which the ultrasonic vibration effect of the ultrasonic vibrator 3 is optimum.

Moreover, the surfaces of the cleaning tank 2 facing the liquid are formed by perforated plates 5 and 6, respectively, and a liquid absorption chamber 7 is provided outside the perforated plate 6 on the liquid absorption side (the right side in the drawing). In addition to being formed in a liquid-tight manner, a liquid-sending chamber 8 is formed in a liquid-tight manner outside the perforated plate 5 on the liquid-sending side (the left side in the drawing).

A pressure feed pump 11 and a filter 12 are interposed between the outlet port 9 opened at the bottom of the liquid suction chamber 7 and the inlet port 10 opened at the liquid feed chamber 8. The provided liquid sending path 13 is continuously connected. Here, the respective holes 5a, 6a in the perforated plates 5, 6 are uniformly arranged over the entire area from the position corresponding to the bottom b of the cleaning tank 2 to the position corresponding to the liquid level a as shown in FIG. There is. The holes 5a and 5b described above are exaggerated with respect to actual dimensions for convenience of illustration.

[0018] with a pore size of each pore portion 5a of the feeding-side perforated plate 5 described above is set to, for example, 4 to 5 mm ^phi, the total sum of the opening areas of the respective holes 5a, a portion of the liquid supply path 13 The value is set to a value corresponding to the cross-sectional area of the pipeline of the constituent pipe 14. Further, each hole 6 in the liquid-absorption side porous plate 6 described above
The pore size of a can, feeding-side perforated plate diameter of the holes 5a in 5 (e.g. 4 to 5 mm ^phi) for example some of the large diameter relative 5-7
mm ^φ is set. In addition, the discharge pressure of the pressure-feeding liquid pump 11 is set so that the discharge pressure of the organic solvent A from the liquid-feeding side porous plate 5 is, for example, 1 to 3 kg / cm ² .

The physical properties of methylene chloride (methylene chloride) used as an example of the organic solvent A are listed below.

Chemical formula: CH ₂ Cl ₂ molecular weight: 84.94 Boiling point: 39.8 ° C. Specific gravity: 1.325 Surface tension: 28.2 dyne / cm With such a configuration, the operation will be described below.

When cleaning the miniature bearings, computer parts and other workpieces, the organic solvent A in the cleaning tank 2 is heated to 30 to 50 ° C. by the preheating heater 4 and the ultrasonic vibrator 3 is driven. When the above-mentioned work is dipped into the liquid of the organic solvent A in the state from the work inlet / outlet port 1, the work is washed by the action of the organic solvent A and the ultrasonic vibration effect.

By the way, in order to rapidly filter the contaminated liquid containing chips, dust and the like washed and removed from the work by the above-mentioned washing, the pressurized liquid feed pump 11 is driven to drive the inlet port 10 from the tip of the pipe 14. , The organic solvent A is fed to the liquid feed chamber 8, and the organic solvent A is discharged into the liquid of the cleaning tank 1 from the respective holes 5a of the liquid feed side porous plate 5 at a pressure of about 1 to 3 kg / cm ^2. And each hole 6a of the perforated plate 6 on the liquid absorption side
When the organic solvent A absorbed from ... Is sucked to the suction side of the pressurized liquid feed pump 11 via the liquid absorption chamber 7 and the outlet port 9, chips and dust are removed by the filter 12 provided in the liquid feed path 13. Since it is removed, there is an effect that it is possible to execute the rapid filtration of the dirty liquid in the cleaning tank 2 formed by the work cleaning.

In short, when the pressurized liquid-sending pump 11 is driven, the organic solvent A in the cleaning tank 2 is supplied from the liquid-sending chamber 8 formed outside the liquid-sending side porous plate 5 of the cleaning tank 2 through the porous plate 5. Is discharged under pressure to the organic solvent A in the cleaning tank 2.
Is sucked to the suction side of the pressurized liquid feed pump 11 through the suction side porous plate 6 and the liquid suction chamber 7 on the outside of the suction side, and chips and dust are removed by the filter 12 provided in the liquid feed path 13. .

As described above, since the facing surfaces in the liquid are formed by the perforated plates 5 and 6 having predetermined pores respectively, the liquid of the organic solvent A in the cleaning tank 2 can be uniformly and rapidly filtered. There is an effect that the cleaning efficiency can be improved.

Further, since the pore size of the liquid-suction side porous plate 6 is set to be slightly larger than the pore size of the liquid-sending side porous plate 5, the flow rate is secured on the liquid-sucking side, that is, on the suction side of the pressurized liquid-sending pump 11. Therefore, there is an effect that cavitation can be prevented.

In addition, since the holes 5a and 6a in the perforated plates 5 and 6 described above are arranged uniformly over the entire area from the position corresponding to the bottom b of the cleaning tank 2 to the position corresponding to the liquid level a, the liquid feeding side. The discharged liquid of the organic solvent A discharged from each pore of the porous plate 5 into the liquid of the cleaning tank 2 is uniformly discharged in the liquid of the cleaning tank 2 over the entire area of the liquid, and Liquid is almost evenly absorbed from the pores. As a result, there is an effect that more favorable rapid filtration can be achieved.

In the correspondence between the configuration of the present invention and the above-described embodiment, the cleaning tank of the present invention is the cleaning tank 2 of the embodiment.
Similarly, the organic solvent corresponds to methylene chloride and HCFC (hydrochlorofluorocarbon as chlorofluorohydrocarbons), but the present invention is limited to the configuration of the above-mentioned embodiment. is not.

For example, in the above embodiment, ultrasonic vibration is applied to the liquid organic solvent A to wash the work, but a part of the organic solvent A is vaporized to be used for washing the work. It may be applied to the configured cleaning device.

[Brief description of drawings]

FIG. 1 is a system diagram showing a cleaning device of the present invention.

FIG. 2 is a partially cutaway perspective view of a main part of FIG.

FIG. 3 is a system diagram showing a conventional cleaning device.

[Explanation of symbols]

 2 ... Washing tank 5 ... Liquid sending side porous plate 6 ... Liquid absorbing side porous plate 5a, 6a ... Hole 7 ... Liquid absorbing chamber 8 ... Liquid feeding chamber 11 ... Pressurized liquid feeding pump 12 ... Filter 13 ... Liquid feeding path

Claims (3)

[Claims] 1. A liquid-sealing liquid-absorbing chamber and a liquid-sending-side porous plate, wherein the liquid-opposing surfaces of a cleaning tank storing an organic solvent are formed of perforated plates, respectively. A cleaning device, which is connected to a liquid-sending chamber formed in a liquid-tight state outside by a liquid-sending path provided with a pressure-sending liquid pump and a filter. 2. The cleaning apparatus according to claim 1, wherein the pore size of the liquid absorption side porous plate is set to be slightly larger than the pore size of the liquid feeding side porous plate. 3. The cleaning apparatus according to claim 1, wherein the holes in each of the perforated plates are uniformly arranged over the entire area from the position corresponding to the bottom of the cleaning tank to the position corresponding to the liquid surface.