JP2000153247A - Cleaning stripping method and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the cleaning work by properly forming a good mixed jetting flow composed of a granule and the like and to provide a cleaning stripping technique effective also for the stripping work against a sticking material. SOLUTION: The mixed flow composed of a gas, a droplet liquid and the granule is formed by connecting a high pressure water pump 2 to a mixer 4, jetting high pressure water at a high speed into the mixer 4, supplying air from an air supply pipe 9 to the jetting flow and simultaneously supplying the granule from a granule supply pipe 14. The cleaning stripping action is performed by jetting the mixed flow from a nozzle 15 at the high speed to blow on the surface of a material to be treated to apply the impact action, which the granule and the droplet liquid as the cleaning stripping media possess, on the surface to be treated. The cleaning stripping action is further accelerated by heating a liquid and a gas supplied to the mixer 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning dirt adhering to the surface of an appropriate object such as an automobile, a railroad vehicle, an aircraft, or a building, or adhering to the surface of an object such as a label or painting. The present invention relates to a cleaning and peeling technique for peeling off attached matter.

[0002]

2. Description of the Related Art As a conventional cleaning method, a detergent solution is applied to the surface of an object, rubbed with a brush or the like, and rinsed with water.
A method of spraying high-pressure water or steam to wash or remove dirt and deposits is generally used. There is also known a method of forming a jet having a large cross section at a high speed by spraying a liquid in the form of a droplet or a mist onto a low-pressure gas stream for cleaning (Japanese Patent Publication No. 5-86274). further,
A method is also known in which a powdery soluble substance such as sodium bicarbonate is added to a liquid and sprayed in a pressurized state, thereby adding a physical cleaning action by an impact action to perform cleaning (Japanese Patent Application Laid-Open No. Hei 8- 168729). There is also known a dry blast apparatus in which a polishing material is put on a low-pressure air flow and blown at a high speed (Japanese Patent Publication No. 1-60392).

[0003]

In the prior art in which the cleaning is carried out by spraying a liquid in the form of a droplet or a mist on a high-pressure liquid or a low-pressure gas flow, the cleaning is performed by adhering to the surface to be processed. The thin liquid film layer prevents the high pressure liquid or the liquid or mist-like liquid jet from reaching the cleaning surface, which is a factor that reduces the cleaning action. In addition, the dry blasting means is naturally not easily applied to the case of cleaning to the extent that dirt attached to the surface is removed since the surface of the object is easily scratched. The object of the present invention is to further improve the cleaning action over such prior art. It is another object of the present invention to develop a cleaning and peeling technique which is effective not only for the cleaning action but also for the action of peeling off the deposits attached to the surface of the article. Further, in that case, it is another object of the present invention to provide a mixed flow forming technique capable of forming a mixed flow serving as a basis of the washing and separating action in a better state and securing a better washing and separating action. Further, it is an object of the present invention to provide an improved cleaning / separation technique that can mainly perform a cleaning action or a peeling action as required, and can take various treatment forms composed of a combination of these two actions. .

[0004]

According to the present invention, a pressure liquid supply means is connected to a mixer so that a liquid is jetted at a high speed in the mixer and gas and powder are supplied to the liquid flow. To form a mixed flow of gas, liquid in the form of droplets, and a granular material, and spraying the mixed flow at high speed from a nozzle onto the surface to be treated, thereby forming a granular material as a cleaning and peeling medium; A technical means of performing a cleaning and peeling action by applying an impact action of a liquid in the form of a droplet to a surface to be processed is commonly employed as a basic configuration. The present invention, as described above, by connecting the pressure liquid supply means to the mixer and jetting at high speed in the mixer, by supplying a gas and powder to the liquid flow, A configuration in which a good mixed flow of liquid in the form of droplets, powder, and gas can be formed by entraining a gas or powder using the energy of a large motion of the high-speed liquid flow. It was done. By jetting the mixed flow at a high speed from the nozzle, the powdered material breaks through the thin liquid film layer of the liquid formed on the surface to be processed, reaches the surface to be processed, and directly impacts. In combination with the impact action of the granular material, the impact action of the liquid in the form of liquid droplets jetted at a high speed is combined with the impact action of the granular material to improve the cleaning and peeling action.

The internal space of the mixer is divided by a partition having small holes, and a liquid is formed by supplying a gas into the space on the upstream side of the partition while injecting the liquid at a high speed. It is also possible to provide a structure in which a powdery or granular material is supplied to a space on the downstream side of the partition wall to form a mixed flow composed of a gas, a liquid in the form of a droplet, and a granular material, and the liquid is ejected at high speed from a nozzle. In that case, when supplying gas to the space on the upstream side of the partition, it may be configured to supply a large amount of gas via the pressure gas supply means, or to the space on the downstream side of the partition. When supplying the granular material, a large amount of gas may be supplied together with the granular material via the pressure gas supply means. The large amount of gas functions as a carrier gas, and forms a high-speed jet with a large diameter when jetting from a nozzle a mixed flow of droplet-shaped liquid and granular material as a cleaning separation medium. It is extremely effective for If the liquid or gas used in the present invention is used in a pre-heated state, the cleaning / peeling action can be further promoted. In that case, steam can be used as the heating gas.

Further, it is possible to select a processing mode by adjusting the supply conditions of the pressure liquid and the supply conditions of the gas and the granular material. That is, by adjusting the supply amount in the liquid supply path, the gas supply path, or the granular material supply path, and by selecting a specific type of the supply material, for example, the particle diameter of the granular material, a processing form dedicated to the cleaning action is performed. Various processing forms can be selected from the processing form dedicated to the peeling action. Furthermore, it is also possible to configure so that a detergent or wax can be supplied to the mixer.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention include, as described above, a treatment form used exclusively for the purpose of cleaning by adjusting the supply amounts and types of liquids, powders and / or gases. A wide range of processing modes up to the processing mode used for the stripping process can be selected. That is, if the supply amount of the gas such as liquid or air is increased to reduce the supply amount of the granular material, or the granular material having a small peeling action is used, the processing form occupies the cleaning function. It can be set on the side where the ratio is higher. Conversely, if the supply amount of the liquid or gas is reduced to increase the supply amount of the granular material, or if a granular material having a large peeling action is used, the rate of the peeling action occupies the processing form. Can be set on the larger side.

As the liquid, an appropriate liquid such as water or a surfactant-added liquid can be used. The size of the droplet can be selected from a fine mist to a large droplet depending on the processing mode. In addition, as the powdery and granular materials, in addition to general abrasives such as alumina, soluble materials such as sodium bicarbonate, dry ice, ice particles, and salts are used to dissolve in the liquid after the washing and peeling operation. You may make it. In addition, as for the supply form of the powder to the mixer, the powder may be supplied in the state of the powder, but the powder may be supplied in the state of the undiluted medium composed of the liquid mixed with the powder. Is also possible. Further, the liquid or gas supplied to the mixer may be supplied at a normal temperature or may be supplied in an appropriately heated state. In that case, it is also possible to use steam as a heating gas supplied to the mixer. As the heating means for the liquid or gas, an electric heating means or an appropriate heating source such as combustion heat or steam can be used. And if you use a heated liquid or gas,
As a result of raising the temperature of the liquid or the like forming the mixed flow to promote the cleaning and peeling action, the effect is greatly improved.
In particular, when a soluble substance is used as the granular material, the granular material is easily dissolved in warm water or steam by increasing the temperature. It is also possible to adjust the impact action that the body plays. Furthermore, when a large amount of gas is supplied through the pressure gas supply means, a blower such as a roots blower or a turbo type blower suitable for low pressure and large capacity may be used, or a reciprocating or rotary compressor may be used. The pressure may be appropriately reduced to make the pressure low and large.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram schematically showing a main part according to an embodiment of the present invention, and FIG. 2 is a partially enlarged view showing a part of the mixer in an enlarged manner. As shown,
In this embodiment, the pressure liquid supply means is constituted by a water tank 1 and a high-pressure water pump 2, and is configured to supply high-pressure water to a mixer 4 via a high-pressure water supply pipe 3. 2, the internal space of the mixer body 5 is divided into a space A and a space B by a partition wall of a partition member 7 having a small hole 6, and a space on the upstream side thereof is provided. A is configured so that high-pressure water from the high-pressure water pump 2 is injected at a high speed from the internal injection port 8 through the high-pressure water supply pipe 3. Further, an air supply pipe 9 constituting the gas supply path is connected to the space A, and the air supply pipe 9 is formed by an ejector effect of a high-speed water flow from the internal injection port 8.
In addition, air is sucked from the atmosphere through a communication hole 10 formed in the mixer body 5, a flow path 11 formed between the mixer body 5 and the partition member 7, and a communication hole 12 formed in the partition member 7. It is configured as follows. In the figure, reference numeral 13 denotes a valve device provided in the air supply pipe. A suitable heating means such as an electric heater is provided in the water tank 1 so as to supply heated high-pressure water to the mixer 4 so that the mixed flow jetted at high speed from the nozzle 15 is appropriately increased. If the temperature is raised, the cleaning and peeling action can be promoted.

In the space B on the downstream side divided by the partition wall, a powder supply pipe 14 constituting a supply path of the powder, a gas, a liquid in the form of a droplet, and a powder are provided. A nozzle 15 for jetting the mixed flow is connected. In this case, it goes without saying that the position of the nozzle 15 can be extended first by interposing a hose or the like between the space B and the nozzle 15. A pressure gas supply unit 16 such as a blower or a compressor having a pressure range of about 0.5 to 8 kgf / cm ² is connected to the upstream end of the powder supply pipe 14. The flow path 17 is provided with an injection section 18 of a granular material as a cleaning and peeling medium. The injection section 18 is connected to a powder and granule supply means including a screw-type delivery device 19 and a powder and granular material tank 20, for example, by controlling the delivery device 19. It is configured such that the supply or stop of the granular material from the injection unit 18 and the supply amount thereof can be controlled. A plurality of such delivery devices 19 and tanks 20 may be provided to store other types of powders and granules, and the type of the powders and granules may be changed by switching between them or changing the supply ratio. . In that case, the injection unit 18 may be separately provided for each of the delivery devices 19. Further, as shown in the drawing, a communication pipe 21 is provided above the tank 20 to guide the internal pressure of the air flow path 17, and the internal pressure of the air flow path 17 is used as the delivery pressure of the granular material. Is also good.

In the present embodiment, a detergent or wax can be supplied through an injection section 22 provided in the middle of the powder supply pipe 14 downstream of the injection section 18. That is, a pressurizing means 24 such as a pump is provided in the middle of the supply pipe 23 connected to the injection section 22, and a detergent tank 26 for supplying a surfactant through a branch pipe 25.
And a wax liquid tank 28 is connected via a branch pipe 27. The branch pipe 2
An electromagnetic opening / closing valve 29 and a flow rate regulating valve 30 are disposed at an intermediate portion of 5, so that the supply or stop of the detergent and the supply amount thereof can be controlled. The branch pipe 2
An electromagnetic opening / closing valve 31 and a flow control valve 32 are provided at an intermediate portion of 7, so that the supply or stop of the wax and the supply amount of the wax can be controlled. In addition, it is also possible to supply a disinfectant or the like instead of the detergent or the wax.

When the cleaning and peeling apparatus according to the present embodiment is used, high-pressure water supplied through the high-pressure water pump 2 is supplied to the internal jet provided in the space A on the upstream side of the mixer 4. The high-speed jet is discharged from the outlet 8 and is jetted into the downstream space B through the small holes 6 while being mixed with the air sucked from the air supply pipe 9 by the ejector effect of the high-speed jet. To form a liquid stream. Into the space B, in addition to the liquid flow in the form of droplets, powder and granules mixed with a large volume of air from the pressurized gas supply means 16 are supplied through a powder and particle supply pipe 14, and these liquids are supplied. A high-speed injection is performed from the nozzle 15 while the droplet-shaped liquid flow, the large volume of air, and the granular material are mixed. Then, in the process, a mixed flow composed of gas, liquid in the form of droplets, and powder is formed and sprayed toward the surface to be processed, whereby intended cleaning and peeling are performed. In that case, the discharge pressure and flow rate of the high-pressure water pump 2 and the pressure gas supply means 16 are controlled, and the delivery device 19 is controlled.
Of the powder or granules by controlling the supply amount of the powder or granules, or providing a plurality of delivery devices 19 or tanks 20 as described above, storing other types of powders and switching the supply of the powders or changing the supply ratio. By changing the type, various processing modes can be selected in a wide range from a processing mode dedicated to the cleaning action to a processing mode dedicated to the peeling action. As described above, the heating means is provided in the water tank 1 or the heating means is provided downstream of the pressurized gas supply means 16 or in the path of the air supply pipe 9 so that the nozzle 15
By appropriately raising the temperature of the mixed flow jetted at a high speed, it is possible to promote the cleaning and peeling action.

Further, if the detergent is supplied from the detergent tank 26 to the injection portion 22 via the pressurizing means 24 and is supplied to the mixer 4 while mixing with the large volume of air from the pressurized gas supply means 16, The cleaning action can be further improved by the surfactant action. Note that the detergent can be added to the water tank 1. Further, the supply of the granular material is stopped by the delivery device 19 and the electromagnetic on-off valve 29 is stopped.
Is closed to stop the supply of the detergent. Further, with the high-pressure water pump 2 stopped and the valve means 13 closed, the electromagnetic on-off valve 31 is opened to supply wax from the wax liquid tank 28 to supply the pressurized gas. If the wax is supplied to the mixer 4 while being mixed with the large volume of air from the means 16, the wax can be applied to the processing surface through a large amount of airflow through the nozzle 15, so that the workability of the wax work is improved. it can. Further, if the electromagnetic on-off valve 31 is closed to supply only a large amount of air from the pressure gas supply means 16, the air flow jetted at a high speed from the nozzle 15 is blown onto the surface to be processed. It can be easily dried by blowing off moisture and the like adhering to the surface.

FIG. 3 is a schematic diagram showing a main part of another embodiment of the present invention. In this embodiment, the same components as those in the above embodiment are denoted by the same reference numerals, and
This is characterized in how to connect the air supply pipe 9 and the granular material supply pipe 14 to the upstream side. That is, in the present embodiment, the pressure gas supply means 16 including a blower, a compressor, or the like is connected to the upstream end of the air supply pipe 9 so that a large amount of air is sent through the air supply pipe 9. At the same time, the supply pipe 23 is connected via an injection section 33 provided at an intermediate portion on the downstream side, a pressurizing means 24 including a pump or the like is provided at the middle thereof, and further via a branch pipe 25. Detergent tank 26 for surfactant supply
And a wax liquid tank 28 is connected via a branch pipe 27. In addition, an electromagnetic opening / closing valve 29 and a flow regulating valve 30 are provided in the middle of the branch pipe 25, and an electromagnetic opening / closing valve 31 and a flow regulating valve 32 are provided in the middle of the branch pipe 27. ing. On the other hand, on the upstream side of the granular material supply pipe 14, a granular material supply means including a delivery device 19 and a granular material tank 20 is connected. It is configured to supply the mixer 4 by its own weight without using a large volume of air. Also in this case, an air supply means for conveying the granular material may be added as necessary. As in the above-described embodiment, if appropriate heating means such as an electric heater is provided in the water tank 1 or the like so that the temperature of the mixed flow jetted from the nozzle 15 at a high speed is appropriately increased, the cleaning can be performed. It is possible to promote the peeling action. Further, it is possible to supply the mixture to the mixer 4 in a state of a stock solution of a medium comprising a liquid mixed with the powder and granules via the powder and particle supply pipe 14.

In the case of this embodiment, however, the high-pressure water from the high-pressure water pump 2 is supplied to the internal injection port 8 via the high-pressure water supply pipe 3 in the upstream space A divided by the partition.
, And a large volume of air is forcibly supplied from the pressurized gas supply means 16 via the air supply pipe 9, so that the droplet-like water flow is further promoted. It should be noted that there is basically no difference in the manner of use as a cleaning / separation device from the case of the above-described embodiment, and the same function is achieved.

FIG. 4 is a schematic diagram showing a main part of another embodiment of the present invention. This embodiment shows a modification of FIG. 3, in which the steam supply source 3 is used as the pressurized gas supply means 16.
4 is employed to supply the pressurized gas in the form of steam to the mixer 4 via the steam supply pipe 35, and there is no fundamental difference from the previous embodiment in other configurations. Thus, in this embodiment, high-temperature steam is supplied to the mixer 4 as a pressurized gas, and the temperature of the mixed flow injected from the nozzle 15 is increased. As a result, the cleaning and peeling action is promoted,
The effect is greatly improved. Note that, similarly to the above-described embodiment, it is possible to further provide an appropriate heating means such as an electric heater in the water tank 1 or the like. Further, the granules may be supplied to the mixer 4 in a state of a stock solution of the medium containing the granules via the granule supply pipe 14. In addition, when a soluble powder is used as the powder, since the powder is easily melted by the temperature rise by the steam or the like, the impact action of the powder is adjusted through temperature control by the heating. It is also possible.

[0017]

According to the present invention, the following effects can be obtained. (1) Since the liquid is ejected at a high speed in the mixer and the gas is mixed with the liquid jet, the liquid can be more accurately formed into liquid droplets, and the liquid is jetted through the pressure gas supply means. Since it is configured to supply a large amount of gas, it is possible to jet a high-speed mixed flow of gas, droplet-like liquid, and granular material in a very good mixing state from a nozzle as a cleaning separation medium. (2) Since the high-speed sprayed particles break through the thin liquid film layer of the liquid formed on the surface and reach the surface to be processed and directly exert an impact action, the impact action of the powders and granules is applied. At the same time, a very good cleaning and peeling action can be obtained in combination with the impact action of the liquid in the form of droplets jetted at a high speed. (3) The processing mode can be selected by changing the supply conditions of the high-pressure liquid, the gas, or the granular material supplied to the mixer. That is, by selecting the supply pressure and supply amount, the type of the granular material and the liquid, and the like, it is possible to select various processing modes from a processing mode dedicated to the cleaning action to a processing mode dedicated to the peeling action. (4) By supplying the detergent and the wax, the cleaning action can be improved, and the workability of the wax work can be improved. (5) If the liquid or gas supplied to the mixer is heated, the temperature of the mixed stream constituting the cleaning / separating medium is increased, and the cleaning / separating action is promoted. Be improved. Further, when a soluble material is employed as the powder or granule, since the powder or the like is easily melted by raising the temperature of the liquid or the like, by adjusting the solubility through temperature control by the heating, the impact of the powder or granule can be improved. It is also possible to adjust the action.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a main part of an embodiment of the present invention.

FIG. 2 is a partially enlarged view showing an enlarged portion of a mixer.

FIG. 3 is a schematic configuration diagram showing a main part of another embodiment of the present invention.

FIG. 4 is a schematic configuration diagram showing a main part of another embodiment of the present invention.

[Explanation of symbols]

1 ... water tank, 2 ... high pressure water pump, 3 ... high pressure water supply pipe,
4 ... Mixer, 5 ... Mixer body, 6 ... Small hole, 7 ... Partition member, 8 ... Inner injection port, 9 ... Air supply pipe, 10 ... Communication hole,
DESCRIPTION OF SYMBOLS 11 ... Flow path, 12 ... Communication hole, 13 ... Valve device, 14 ... Powder supply body, 15 ... Nozzle, 16 ... Pressure gas supply means, 1
7 ... air flow path, 18 ... injection part, 19 ... delivery device, 20
... Tank, 21 ... Communication pipe, 22 ... Injection part, 23 ... Supply pipe, 24 ... Pressurizing means, 25 ... Branch pipe, 26 ... Detergent tank, 27 ... Branch pipe, 28 ... Wax liquid tank, 29 ... Electromagnetic on-off valve , 30 ... Flow control valve, 31 ... Electromagnetic on-off valve, 32
... Flow control valve, 33 ... Injection part, 34 ... Steam supply source, 35
... Steam supply pipe

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Jiro Watanabe 58, Kozuda Honmachi, Kanazawa-shi, Ishikawa Prefecture Within Shibuya Kogyo Co., Ltd. (72) Inventor Hiroyuki Nakano 421 Kita Yasue-cho, Kanazawa City, Ishikawa Prefecture Inside Shibuyama Scenery Co., Ltd.

Claims (14)

[Claims] 1. A pressure liquid supply means is connected to a mixer,
A liquid is jetted at high speed in the mixer, and a gas and a granular material are supplied to the liquid flow to form a mixed flow of gas, liquid in the form of droplets, and a granular material. Is sprayed from a nozzle at a high speed and sprayed onto the surface to be treated, whereby the cleaning and peeling action is performed by applying the impact action of the granular material and the liquid in the form of droplets as the cleaning and peeling medium to the surface to be treated. Cleaning and peeling method. 2. An internal space of the mixer is divided by a partition having small holes, and a liquid is jetted into a space at an upstream side of the partition at a high speed and a gas is supplied to form a liquid flow in the form of a droplet. Further, it is characterized in that the granular material is supplied to a space on the downstream side of the partition wall to form a mixed flow composed of gas, liquid in the form of droplets and the granular material, and the mixture is jetted at high speed from the nozzle. The cleaning and stripping method according to claim 1. 3. The apparatus according to claim 2, wherein a large amount of gas is supplied via a pressure gas supply means when supplying gas to the space on the upstream side of said partition.
The cleaning and peeling method described in the above. 4. The method according to claim 1, wherein a large amount of gas is supplied to the space on the downstream side of the partition wall through a pressurized gas supply means together with the granular material. The cleaning and stripping method according to claim 2. 5. The apparatus according to claim 1, wherein the gas and / or the liquid are supplied in a heated state.
5. The cleaning and peeling method according to any one of 4. 6. The processing method according to claim 1, wherein a processing mode can be selected by changing at least one of supply conditions of the liquid, gas, and granular material. The cleaning and peeling method described in the above. 7. The cleaning and stripping method according to claim 1, wherein a detergent and / or a wax is supplied to the mixer. 8. A pressurized liquid supply means is connected to a mixer via a liquid supply path, and a gas supply path and a granular material supply path are connected to the mixer, and high-speed injection is performed in the mixer. By supplying a gas and a granular material to a liquid flow, a mixed flow composed of a gas, a liquid in the form of a droplet, and a granular material is formed, and the mixture is ejected from a nozzle at a high speed. A cleaning / separating apparatus characterized in that a cleaning / peeling action is performed by applying an impact action of a body and a liquid in the form of a droplet to a surface to be processed. 9. An internal space of the mixer is divided by a partition provided with small holes, and a gas supply path is connected to a space on the upstream side of the partition so that air is supplied to the liquid flow jetted at a high speed into the space. To form a liquid stream in the form of droplets, and connect a powder supply path to the space on the downstream side of the partition wall to mix the gas, the liquid in the form of droplets and the powder. 9. The cleaning and peeling apparatus according to claim 8, wherein a stream is formed so as to be jetted at a high speed from a nozzle. 10. The cleaning according to claim 8, wherein a pressure gas supply means is connected to the gas supply path so that a large amount of gas can be supplied via the pressure gas supply means. Stripping device. 11. A pressure gas supply means is connected to the powder supply path, so that a large amount of gas can be supplied together with the powder via the pressure gas supply means. The cleaning and peeling apparatus according to any one of 8 to 10. 12. The apparatus according to claim 8, wherein said gas and / or liquid is heated and supplied.
The cleaning / peeling apparatus according to any one of the above. 13. The cleaning and peeling apparatus according to claim 8, wherein a detergent supply path and / or a wax supply path are connected to the powdery material supply path. 14. A structure in which at least one of the liquid supply path, the gas supply path, and the granular material supply path is configured to be adjustable, and the processing mode can be changed through adjustment of the supply path. The cleaning and peeling apparatus according to any one of claims 8 to 13, wherein the cleaning and peeling apparatus is used.