JPH03109981A - Method and device for underwater automatic washing - Google Patents

Abstract

PURPOSE:To obtain a sufficient washing effect without using a detergent by applying vibration and oscillation by blowing up bubbles from below to the work supported pendent in washing water and injecting the washing water flow at a high pressure from nozzles. CONSTITUTION:The work W suspended on a conveyor 6 by a feeding means 2 is transported to a part 7 for immersing in the washing water and is vibrated and oscillated by the bubbles blown out of a bubble generator 3 disposed below. Further, the washing water flow at a high pressure is injected from the rotary type nozzles 4 disposed on both sides and below and the work is thereby washed. The blown up bubbles are intruded into the high-pressure washing water flow, by which the bubbles are changed to the fine and high-velocity bubbles. The ultrasonic effect and cavitation induced by these bubbles act on the work W and the work W is washed in all the corners while the damaging of the work is prevented by the cushion effect of the water. The sufficient washing is thus obtd. without using a detergent.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an underwater oral cleaning method and device for automatically performing effective cleaning with cleaning water without using any special cleaning agent. It is.

(Prior Art) For example, when cleaning mechanical parts, etc., ultrasonic cleaning, rocking cleaning, shower cleaning, etc. using special cleaning agents such as fluorocarbon solvents, organic solvents, and petroleum-based cleaning agents are performed.

In the cleaning process, an effective cleaning effect cannot be obtained unless the cleaning liquid is brought into good contact with the entire object to be cleaned.In order to improve this point, the invention of Japanese Patent Publication No. 63-53872 was proposed. ing.

In the industrial field, a system is known, such as the invention disclosed in Japanese Patent Laid-Open No. 59-118621, in which a workpiece is continuously cleaned while being moved. However, in order to carry out cleaning operations continuously, a perfect cleaning effect is required, and when carrying out the invention, it is necessary to use a special cleaning agent such as a fluorocarbon solvent, an organic solvent, or a petroleum-based cleaning agent.

(Technical issue) As described above, in the field of conventional industrial cleaning, it is assumed that special cleaning agents such as fluorocarbon solvents, organic solvents, and other petroleum-based cleaning agents are used. Organic solvents are considered to be the cause of contaminating groundwater, rivers, and coastal waters, and causing secondary human pollution. In addition, the use of these special cleaning agents results in high running costs.On the other hand, although there have been efforts and improvements to improve the cleaning effect, they are limited to swirling the cleaning liquid flow. Furthermore, ultrasonic cleaning has also been put into practical use, but this has the problem of increasing costs.

The purpose of the present invention is to solve the above-mentioned problems, and by spraying cleaning water and air bubbles underwater onto the object to be cleaned, and by applying the cleaning water to every corner of the object, the invention can be sufficiently effective without using the above-mentioned special cleaning agent. An object of the present invention is to provide an automatic underwater cleaning method and a device therefor, which can automatically carry out cleaning.

(Technical means) The purpose is to automatically send the object to be cleaned into the cleaning tank,
In addition, there is a setting process in which the object to be cleaned is suspended in the washing water filled in the same tank, and air bubbles are blown up from below against the object to be cleaned, which is suspended in the air, causing vibration and rocking motion in the object to be cleaned, and This can be achieved by a cleaning process that includes spraying a high-pressure cleaning water stream onto the object to be cleaned using a nozzle, and converting the bubbles into fine, high-speed bubbles by entraining the bubbles in the high-pressure water stream.

The cleaning process during the process includes: (1) Vibration and rocking caused by bubbles; (2) Water hammer energy due to the jet of high-pressure cleaning water; (2) Fine high-speed bubbles generated when the energy in (2) acts on the bubbles in (2).
It is necessary to include cleaning means consisting of elements. This configuration enables high-level cleaning with cleaning water.

In addition, the cleaning device that implements this method includes a cleaning tank 1 that stores cleaning water and can immerse the object to be cleaned, and automatically sends and sets the object to be cleaned into the cleaning tank 1.
A feeding means 2 for supporting and moving the object to be cleaned with the lower surface of the object to be cleaned exposed; and a bubble generator 3 disposed in the cleaning tank for blowing air bubbles from below onto the object to be cleaned. It is preferable to have a configuration including a nozzle 4 which is disposed on one or both of the sides or the bottom of the cleaning tank and injects a medium water stream onto the object to be cleaned from the side or the top and bottom.

The washing water used in the method and apparatus described above may be industrial water, but pure water or ordinary tap water may also be used; hot water is more effective than cold water, and water with a temperature of 50 to 80°C is usually used. Furthermore, high pressure shall be applied to the cleaning water jet. Here, high pressure is defined as pressure exceeding 50 kg/cm2. The high pressure water stream is sprayed continuously or intermittently during cleaning. Furthermore, although a conventional cleaning agent is not used, an alkaline detergent may be used depending on the conditions of the object to be cleaned, and a rust preventive agent may be used when cleaning iron or aluminum-based materials. In this sense, the present invention can be said to be a cleaning method using only cleaning water. The above-mentioned nozzles work on the object to be cleaned and the air bubbles acting on it, and are installed at a minimum of one place on one surface, and at a maximum of six surfaces at an appropriate number of places, and each nozzle has one or two or more nozzles. A water injection port can be provided.

(Example) This will be explained below with reference to the drawings.

[I] The cleaning tank 1 shown in FIG. 1 is formed into a long and narrow shape, and the objects to be cleaned W are carried in from outside the tank by a conveyor 6, which is a feeding means 2, that automatically moves in the long direction, and are washed, and then It will be carried out. This conveyor 6 is a cylindrical structure that does not prevent air bubbles from passing through, and has a immersed part 7 in the center so that it moves through the washing water so that it also serves as a support means for the object W in the washing tank. Reference numeral 11 denotes a carry-in part at one end of the conveyor 6, and 12 denotes a carry-out part at the other end. The space between the carry-in part 11, the carry-out part 12 and the central immersion part 70 is sloped for entering and exiting the washing water, and the washing position is 13, the object W to be cleaned is at the bottom 14
It is guided by guide rolls 6a so as to be placed between the water surface and the water surface. Reference numeral 19 denotes an aerial cleaning section provided in the conveyor loading section 11, which includes an aerial cleaning nozzle 19a and a filter 19.
b etc.

The bubble generator 3 is disposed below the conveyor immersion section 7 at the washing position 13, and is connected to the main pipe 15 along the longitudinal direction of the tank.
It has a large number of branch pipes 16 installed at regular intervals so as to be perpendicular thereto, and countless small holes 17 are formed in the upper part of the branch pipes 16, and air sent from an external blower 18 is blown onto the object to be cleaned as bubbles. It is formed like this. The air bubbles generated by the generator 3 blow up and cause vibrations and oscillations on the object W to be cleaned, and at the same time, the cleaning water flow jetted at high speed changes the air bubbles into fine, high-speed air bubbles, resulting in a cleaning effect. It is designed to be obtained.

The nozzles 4 are of a rotating type and are provided facing the workpiece from the left and right sides, the bottom surface, and the top surface of the cleaning tank 1. Each nozzle 4 has a rotating shaft 20 at the center through which the cleaning water flow passes, and a rotating shaft 20 at the tip thereof. A plurality of radial rotating arms 22 attached via joints 21 and a water injection port 2 attached to the tip of each arm 22.
It consists of 3. The rotating arm 22 has two types, long and short, 22a, 2.
Consists of 2b. Of course, the length of each arm can be changed to a different length, and the water injection port 23 can also be provided to be inclined inward or outward, other than the one shown perpendicular to the direction of rotation. Note that the nozzle may not be rotatable but may be arranged to generate a vortex flow.

In Fig. 3, reference numeral 24 indicates a frame for mounting the rotating shaft 20 with a bearing, 25 indicates an air supply pipe 17 connected to the base end of the rotating shaft 4, and 26 indicates a screw thread for attaching the sleeve to the rotating shaft 4 between the frames. Motor 27 is a gear set that is stopped or engaged with a key etc.
Driven by. Washing water is heated to a temperature in the range of 50 to 80° C., and is sprayed under ultra-high pressure of 50 kg/cm 2 or more. The higher the pressure resistance, the better; 100 to 1.
Pressure is applied to about 50 Kg/cm2 or even 300 Kg/cm2, and the degree of pressure can be changed depending on the object W to be cleaned. 28 is a second conveyor installed at the end of the unloading section 12;
29 is a rinsing automatic cleaning section installed on the conveyor;
9a is a fixed nozzle pipe for rinsing, 30 is an automatic drying section installed ahead of the pipe, 30a is a drying air outlet, 3
0b is an air vent, and 31 is a drying blower. Each of the above operating parts is automatically operated by operating an operation panel not shown.

Operation and cleaning method When cleaning the object W to be cleaned with the device configured as described above, when operating the device by operating the operation panel, the object W to be cleaned is washed with high-pressure washing water in the aerial cleaning section 19. It is first prewashed by spraying, and then automatically conveyed by a conveyor 6 to the washing tank 1 in which washing water is stored, and moved into the washing water.

The object W to be cleaned is immersed in cleaning water heated to 50 to 80°C, and reaches an underwater cleaning position 13.

Here, first, countless fine bubbles are blown up from below by the bubble generator 3 and collide with the object W to be cleaned, causing it to vibrate.

At the same time, a high-pressure cleaning water stream is ejected from the rotating nozzle 4 toward the object W to be cleaned from all directions, right and left and up and down, and the object W to be cleaned is cleaned with water hammer energy without generating a vortex.

Further, when this high-pressure water stream is jetted at high speed, it entrains air bubbles, turns them into high-speed air bubbles, induces ultrasonic action, and collides with the object W to be cleaned, thereby causing cavitation. For this reason, the impact force of the water flow, bubbles, and cavitation with a large momentum reaches even hidden parts that cannot be hit by simply spraying water.

The above-mentioned cleaning work is performed while the object W to be cleaned is moved through the horizontal cleaning position 13 underwater by the conveyor 6, but this is carried out intermittently, and the cleaning work is temporarily stopped at an appropriate position in the cleaning position 13, and the cleaning work is carried out during that time. You may also do this. Thereafter, the object W to be cleaned is rinsed and dried, but since it already has a temperature of several tens of degrees, this contributes to moisture evaporation and the drying is quick.

[II] FIG. 4 and subsequent figures show a second embodiment of the present invention. The apparatus of this example has a cleaning tank 1 approximately in the center and separate conveyors on the left and right sides of the cleaning tank 1, so that the object W to be cleaned moves from the left to the right in the figure. The conveyors include a carry-in conveyor 6', a moving conveyor 8 which is a sending conveyor, a second moving conveyor 8' which is a take-up conveyor, and a carrying conveyor 3.
The movable conveyors 8, 8' can automatically move in and out from the conveyors 6' and 33, respectively, into the cleaning tank l which also serves as a preliminary air cleaning section and a rinsing section.

Therefore, the part of the washing tank facing the mobile conveyor 8.8' has a gate 9.9' that can be opened and closed up and down, and when the gate 9.9' is lowered and closed, it is airtight and can be filled with washing water. It becomes a watertight tank. 34 and 35 indicate an injection part and a discharge part for water during washing. 36 is an air blow nozzle pipe installed in the cleaning tank 1, 37 is a rinsing nozzle pipe, 38
indicates a basket for storing workpieces.

The bubble generator 3 is provided near the bottom of the cleaning tank 1 and has the same structure as the above-mentioned example, and a rotary table 10 is installed above the bubble generator 3 as means for supporting the object W to be cleaned. The table 10 has a structure that allows air bubbles to pass through as is.

Rotary nozzles 4 are also installed on the left and right sides and on both the top and bottom of the table, which provides a cleaning position. Automatic drying section 3
0 Other configurations may be the same as those of the embodiment (2).

Operation and cleaning method n In the case of Embodiment II, when the device is activated, the object W to be cleaned reaches the mobile conveyor 8 from the carry-in conveyor 6' and is placed on the rotary table 10 in the cleaning tank 1 through the automatically opened gate 9. When the gate 9 is set to 1 and the gate 9 is closed, a pre-washing process is performed by jetting high-pressure washing water, and then water is injected to perform underwater washing.

Here, as mentioned above, ultrasonic action is induced by the vibrations generated by the bubbles from the bubble generator 3, the water hammer energy by the high-speed, high-pressure water flow from the rotating nozzle 4, and the high-speed bubbles made fine by this energy. , cavitation is added and a cleaning action is performed on the object W to be cleaned,
Afterwards, the water is drained and rinsed. During this time, the rotary table IO continues to rotate. Next, the rear gate 9' is opened, and the cleaning work is completed by drying in the drying section 3Q.

(Effects) Therefore, according to the present invention, all the cleaning work with cleaning water for the object to be cleaned is automatically performed, and in particular, vibrations and rocking caused by air bubbles, extremely large amount of water due to ultra-high pressure cleaning water stream sprayed from the nozzle 4, etc. The ultrasonic action and cavitation induced by the impact energy and the high-speed fine bubbles generated by this energy act on the object W to be cleaned, cleaning it thoroughly. During washing, water is always present between the objects to be washed and exerts a cushioning effect, so the objects to be washed are not damaged by the high-pressure water flow and do not require the use of detergent (although water and air bubbles are sufficient to provide a cushioning effect). This has the effect of making it possible to carry out thorough cleaning.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; Fig. 1 is a plan view of the first embodiment, Fig. 2 is a side view, Fig. 3 is an enlarged sectional view of the main part, and Fig. 4 is a second embodiment. 5 is a plan view, and FIG. 5 is a side view. DESCRIPTION OF SYMBOLS 1...Cleaning tank, 2...Feeding means, 3...Bubble generator, 4...Nozzle, 5...Transfer means, 6...
Conveyor, 7...Immersion part, 8.8'...Movable conveyor, 9.9'...Opening/closing gate, 10... Rotating table.

Claims (7)

[Claims] (1) A setting process in which the object to be cleaned is automatically sent into the cleaning tank and supported in a suspended state in the cleaning water that fills the tank, and air bubbles are removed from below to the object to be cleaned while it is suspended in the air. A process in which the objects to be cleaned are blown up, vibrated, and rocked, and a high-pressure cleaning water stream is sprayed onto the objects to be cleaned from a nozzle, and the bubbles are turned into fine, high-speed bubbles by being drawn into the high-pressure water stream. An underwater automatic cleaning method comprising: a cleaning process comprising: (2) An automatic underwater cleaning method that includes a transfer process in which the items to be cleaned are automatically carried out from the cleaning tank and transferred to the next process. (3) Claim 1: The cleaning water stream is rotationally sprayed from a nozzle.
Underwater automatic cleaning method described in section. (4) A cleaning tank 1 in which cleaning water can be stored and objects to be cleaned can be immersed therein, and the lower surface of the objects to be cleaned is exposed in order to automatically send and set the objects to be cleaned into the cleaning tank 1. a feeding means 2 for supporting and moving the object to be cleaned in the cleaning tank; a bubble generator 3 for blowing air bubbles from below to the object to be cleaned placed in the cleaning tank; Or an automatic submersible cleaning device comprising nozzles 4 arranged on both sides and spraying a stream of cleaning water onto the object to be cleaned from the side or top and bottom. (5) The feeding means 2 is a cage-shaped conveyor 6,
5. The automatic underwater cleaning device according to claim 4, further comprising an immersed portion 7 so as to move through the cleaning water of the cleaning tank. (6) The feeding means 2 is a mobile conveyor 8, and the cleaning tank 1 is equipped with an opening/closing gate 9 on at least one side for allowing the mobile conveyor 8 to go in and out, and rotates as a means for supporting the objects to be cleaned sent by the conveyor 8. 5. The automatic underwater cleaning device according to claim 4, wherein the table 10 is built-in. (7) The automatic underwater cleaning method according to claim 4, wherein the nozzle is a fixed type, an oscillating type, or a rotary type, and one or more nozzles are provided at the cleaning position.