JPH0847676A - Cleaning method and device therefor - Google Patents

Abstract

PURPOSE:To enhance the cleaning efficiency of a device by ejecting a high- pressure liq. against a material to be cleaned from an air atmosphere. CONSTITUTION:A high-pressure liq. ejector consisting of a liq. pump 2 and a nozzle tube 3 having a liq. ejection port 3a for ejecting the high-pressure liq. discharged from the pump 2 is used to intermittently eject the high-pressure liq. from the ejection port 3a of the tube 3, hence the high-pressure liq. is intermittently impinged on a material to be cleaned, and the material is cleaned by the collision energy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning method and device for cleaning a high-pressure liquid ejected from a liquid ejection port of a nozzle tube by colliding it with an object to be cleaned such as machined parts and repaired parts.

[0002]

2. Description of the Related Art Generally, when a high-pressure liquid ejected from a liquid ejection port of a nozzle pipe is collided with an object to be cleaned such as machine parts to be cleaned, the liquid pump and an object to be cleaned in an air atmosphere are blown in the air. And a high pressure liquid discharged from the pump is continuously supplied to a liquid jet port of the nozzle pipe, and an air atmosphere is directed from the liquid jet port toward the object to be cleaned in an air atmosphere. In such a case, the high-pressure liquid is continuously sprayed, and the high-pressure liquid collides with the object to be cleaned in the air atmosphere to remove dirt on the surface of the object to be cleaned.

[0003]

However, according to the conventional cleaning method, the high-pressure liquid discharged from the liquid pump is continuously supplied to the liquid jet port of the nozzle pipe, and the liquid to be washed in the air atmosphere is discharged from the jet port. The high-pressure liquid that is continuously jetted toward the object in the air atmosphere is made to continuously collide with the object to be cleaned in the air atmosphere for cleaning, so that when cleaning over a predetermined range, the cleaning range is Since there is no change in the collision energy of the high-pressure liquid over a long period of time, and the cleaning is performed with a substantially uniform collision energy, stains do not easily come off, the cleaning time becomes long, and the cost increases accordingly.

It is an object of the present invention to improve the cleaning efficiency while injecting a high-pressure liquid from the air atmosphere toward the object to be cleaned.

[0005]

In order to achieve the above object, the present invention provides a liquid pump 2 and a liquid jet port 3a for jetting a high-pressure liquid discharged from the pump 2. A high-pressure liquid ejecting device including a nozzle pipe 3 having a nozzle is used to intermittently eject the high-pressure liquid from the ejection port 3a of the nozzle pipe 3 to cause the high-pressure liquid to collide intermittently with the object to be cleaned. The object to be cleaned is washed with energy.

Further, in the invention as set forth in claim 2, the liquid jet port 3a is opened in the air, and the high pressure liquid is jetted from the air into the water in which the object to be cleaned is immersed. When the jet flow enters the water, air is entrained around the jet flow, and a bubble layer is formed around the jet flow so that the jet flow and the bubbles in the bubble layer are formed in the water. The object to be cleaned is caused to intermittently collide with the object to be cleaned so as to clean the object to be cleaned.

Further, the invention according to claim 3 is provided with a liquid pump 2 and a nozzle pipe 3 having a liquid injection port 3a for injecting a high-pressure liquid discharged from the pump 2,
The high-pressure liquid discharged from the liquid jet port 3a of the nozzle tube 3
The intermittent liquid supply means for intermittently supplying the liquid is provided.

Further, according to a fourth aspect of the present invention, a pressure accumulator 7 for accumulating the high pressure liquid is provided in the middle of the liquid supply 4 for supplying the high pressure liquid discharged from the liquid pump 2 to the nozzle tube 3, and the pressure accumulation is performed. The intermittent on-off valve 5 for intermittently supplying the high-pressure liquid to the liquid jet port 3a is interposed between the container 7 and the liquid jet port 3a of the nozzle tube 3.

Further, in the invention according to claim 5, the cleaning tank 8 for immersing the object to be cleaned and the nozzle pipe 3 are opened such that the liquid injection ports 3a thereof face the object to be cleaned immersed in the cleaning tank 8. And the nozzle support 9 that supports the nozzle pipe 3 as described above, and the injection port 3a of the nozzle pipe 3 is open to the air.
When the high-pressure liquid jetted toward the water in the cleaning tank 8 enters the nozzle support 9 from the air into the water,
The air around the jet stream of the high-pressure liquid was entrained, a bubble layer was formed around the jet stream, and the jet stream and the bubbles in the bubble layer were supported at a position where they collided with the object to be cleaned. .

Further, in the sixth aspect of the invention, the nozzle tube 3 supported by the nozzle support 9 is attached to the object to be cleaned in which the injection port 3a of the nozzle tube 3 is immersed in the cleaning tank 8 with respect to the nozzle support 9. It was able to move in the direction of moving away from and approaching.

[0011]

In the first aspect of the invention, the liquid pump 2 and the liquid jet port 3 for jetting the high-pressure liquid discharged from the pump 2 are provided.
Using a high-pressure liquid ejecting device including a nozzle tube 3 having a, the high-pressure liquid is intermittently ejected from the ejection port 3a of the nozzle tube 3 to intermittently collide the high-pressure liquid with the object to be cleaned, Since the object to be cleaned is cleaned by this collision energy, when the cleaning is performed over a predetermined range, the collision energy of the high-pressure liquid can be intermittently applied to the object to be cleaned, and the high-pressure liquid is intermittently applied. A new collision energy can be made to act each time it is sprayed, and the dirt can be effectively removed, and therefore, the cleaning efficiency can be improved.

According to the second aspect of the invention, the liquid jet port 3a is opened in the air to jet the high-pressure liquid from the air into the water in which the object to be cleaned is immersed. When the jet flow enters the water, air is entrained around the jet flow, and a bubble layer is formed around the jet flow so that the jet flow and the bubbles in the bubble layer are formed in the water. Since the object to be cleaned, which is immersed in, is intermittently collided to clean the object to be cleaned, it is possible to apply a new collision energy each time the high pressure liquid is intermittently ejected. Therefore, the intermittent collision energy between the jet flow and the bubbles makes it easier to remove the dirt, and moreover, the ultrasonic waves generated when the bubbles collide and explode contaminate the part where the high-pressure liquid does not collide. Can also be removed A. Moreover, while the high-pressure liquid is jetted into water for cleaning, the pressure drop of the high-pressure liquid in water is jetted by opening the liquid jet port of the nozzle pipe into the water due to the bubble layer around the high-pressure liquid. It is possible to make the size smaller than that of the above case, and sufficient collision energy can be applied to the object to be cleaned. In comparison, the cleaning efficiency can be increased.

According to the third aspect of the invention, the liquid pump 2 and the nozzle pipe 3 having the liquid jet port 3a for jetting the high-pressure liquid discharged from the pump 2 are provided, and the liquid pump 2 discharges the liquid. The high-pressure liquid is supplied to the liquid jet port 3 of the nozzle pipe 3.
Since the intermittent liquid supply means for intermittently supplying a is provided in a, it is possible to intermittently inject the high-pressure liquid from the injection port while using the existing liquid pump, and thus the overall cost is low. It can be provided.

Further, in the invention according to claim 4, a pressure accumulator 7 for accumulating the high pressure liquid in the middle of the liquid supply passage 4 for supplying the high pressure liquid discharged from the liquid pump 2 to the nozzle pipe 3.
Since the intermittent on-off valve 5 that intermittently supplies the high-pressure liquid to the liquid injection port 3a is interposed between the pressure accumulator 7 and the liquid injection port 3a of the nozzle tube 3, the pump 2 discharges the high-pressure liquid. The high-pressure liquid can be accumulated in the pressure accumulator 7, and the accumulated high-pressure liquid can be instantaneously injected from the injection port 3a. Therefore, a small-sized pump having a small discharge capacity while obtaining a predetermined injection amount. Can be used and can be inexpensive.

In the invention according to claim 5, the cleaning tank 8 for immersing the object to be cleaned and the nozzle pipe 3 have their liquid ejection ports 3a opened toward the object to be cleaned immersed in the cleaning tank 8. And the nozzle support 9 that supports the nozzle pipe 3 as described above, and the injection port 3a of the nozzle pipe 3 is open to the air.
When the high-pressure liquid jetted toward the water in the cleaning tank 8 enters the nozzle support 9 from the air into the water,
Air around the jet stream of the high-pressure liquid is entrained, a bubble layer is formed around the jet stream, and the jet stream and the bubbles in the bubble layer are supported at a position where they collide with the object to be cleaned. From the above, the object to be cleaned can be immersed in the cleaning tank 8 to cause the jet flow and the bubbles to collide with each other, so that the object to be cleaned can be washed in a wider area than the region where the jet flow collides, and the cleaning efficiency can be improved. While being improved, the high-pressure liquid is sprayed into the water in the cleaning tank 8 to generate bubbles. Therefore, when the bubbles rise to the surface of the water, the contaminants such as oil removed from the object to be cleaned are raised to the surface of the water. Therefore, as compared with the cleaning by jetting the high-pressure liquid in the air atmosphere, the filth recovery process becomes easier.

Further, in the sixth aspect of the invention, the nozzle tube 3 supported by the nozzle support 9 is attached to the object to be cleaned in which the injection port 3a of the nozzle tube 3 is immersed in the cleaning tank 8 with respect to the nozzle support 9. Since it is movable in the direction of moving toward and away from the nozzle tube 3, the nozzle tube 3 can be moved in accordance with the amount of water in the cleaning tank 8 and the immersion position of the cleaning object.
The support position of the nozzle tube 3 can be adjusted, and the distance from the jet port 3a of the nozzle tube 3 to the water surface can be arbitrarily changed. Therefore, when the high pressure liquid is jetted from the jet port 3a into water, The amount can be increased and relatively large bubbles can be generated around the jet stream, and the cleaning range can be widened accordingly.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the cleaning apparatus of the first embodiment shown in FIG. 1 will be described.

The cleaning device includes a liquid pump 2 such as a reciprocating pump driven by a driving device 1 such as a motor.
A nozzle pipe 3 communicating with the pump 2 via a liquid supply path 4 such as a liquid feed pipe, and having a liquid jet port 3a for jetting high-pressure liquid discharged from the liquid pump 2, and the liquid pump 2 The high-pressure liquid to be discharged is supplied to the liquid injection port 3 of the nozzle tube 3.
Using a cleaning device having an intermittent opening / closing valve 5 for intermittently supplying a to the a, a high-pressure liquid is intermittently ejected from the ejection port 3a of the nozzle tube 3 to be cleaned such as a machined part or a repaired part. A high-pressure liquid is intermittently collided with A, and the object A to be cleaned is washed by this collision energy.

The intermittent on-off valve 5 is an electromagnetic valve equipped with a valve housing having a valve passage, a spool which is built in the valve housing and opens and closes the valve passage, and an electromagnetic solenoid 5a having a movable iron core and a coil. The solenoid 5a is energized to instantly open the spool to fully open the valve passage, and shut off energization to instantly close the spool to shut off the valve passage. By repeating the opening / closing operation of the spool, the liquid pump 2
The high-pressure liquid discharged from the liquid jet port 3a of the nozzle tube 3
I am trying to supply it intermittently.

A pressure adjusting valve 6 for adjusting the pressure of the high-pressure liquid flowing in the liquid supply path 4 is provided in the middle of the liquid supply path 4, and the spillway 2 connected to the spill port of the pressure adjusting valve 6 is provided.
0 is opened to the tank T so that the liquid discharged from the liquid pump 2 can be returned to the tank T from the spillway 20 when the intermittent opening / closing valve 5 is closed.

The number of the nozzle pipes 3 is not limited to one, but a plurality of nozzle pipes 3 are provided. The intermittent opening / closing valves 5 are provided corresponding to the nozzle pipes 3 so that the operation timing of each intermittent opening / closing valve 5 is shifted. In addition, the number of the injection port 3a of the nozzle tube 3 may be one or plural.

Next, the operation of the first embodiment constructed as described above and the method of cleaning using the same cleaning apparatus will be described.

The liquid pump 2 is driven and the intermittent on-off valve 5 is opened to supply the high-pressure liquid discharged from the liquid pump 2 to the jet port 3a of the nozzle tube 3, and the object to be cleaned is jetted from this jet port 3a. Fire toward A. Then, by repeatedly energizing / disconnecting the electromagnetic solenoid in the intermittent on-off valve 5 at intervals of 10 Hz, for example, the spool of the intermittent on-off valve 5 is instantly opened / closed to move the high pressure liquid to the nozzle pipe 3 The high-pressure liquid can be intermittently supplied from the injection port 3a, and the high-pressure liquid can be intermittently collided with the object to be cleaned A by intermittently ejecting the high-pressure liquid from the injection port 3a. Therefore, the collision energy of the high pressure liquid is transferred to the object A to be cleaned.
The cleaning efficiency can be increased because the new collision energy can be applied each time the high-pressure liquid is intermittently ejected. Moreover, since it is only necessary to provide the intermittent on-off valve 5 in the middle of the liquid supply passage 4, it is possible to use an existing liquid pump and provide it at low cost.

In the first embodiment shown in FIG. 1, the electromagnetic on-off valve 5 is used as an intermittent liquid supply means for intermittently supplying the high-pressure liquid discharged from the liquid pump 2 to the liquid injection port 3a of the nozzle pipe 3. Although not shown, a rotary type on-off valve having a valve body that is continuously driven to rotate by, for example, a motor, and the valve passage is opened and closed while the valve body makes one rotation. This on-off valve is interposed in the liquid supply passage 4 such as a liquid feeding pipe, and the valve passage is instantaneously repeatedly opened and closed by the rotation of the valve body so that the high-pressure liquid is intermittently supplied to the injection port 3a. Maybe
For example, the suction / discharge cycle of the liquid pump 2 including a multiple reciprocating pump having a plurality of pistons may be used without using the on-off valve. That is, as shown in FIG. 2, a multiple chain including a plurality of pistons 21 that are reciprocally driven by a driving body such as a crank, and a plurality of suction valves 22 and discharge valves 23 that are opened and closed by the reciprocating drive of these pistons 21. The discharge side passage 25, which communicates with the plurality of pressurizing chambers 24 corresponding to the pistons 21 through the respective discharge valves 23, is partitioned by using a liquid type liquid pump without communicating with each other, and a plurality of independent discharges are formed. The side passage 25 and the nozzle pipe 3 are communicated with each other via a liquid supply passage 4 such as a liquid feeding pipe, and each pressurizing chamber 2 is in the discharge stroke of each piston 21.
The high-pressure liquid discharged from the nozzles 4 to the discharge passages 25 through the discharge valves 23 is separately supplied to the nozzle pipes 3 to intermittently discharge the liquid from the liquid jet ports 3a of the nozzle pipes 3. You may Also in this case, the existing liquid pump can be used, and the intermittent on-off valve 5 can be used.
Therefore, maintenance due to wear of the intermittent on-off valve can be eliminated.

Next, a second embodiment will be described with reference to FIG.

In the second embodiment shown in FIG. 3, an accumulator or the like for accumulating the high pressure liquid discharged from the liquid pump 2 is provided between the liquid pump 2 and the intermittent on-off valve 5 in the liquid supply passage 4. A pressure accumulator 7 is provided so that the high pressure liquid is accumulated when the intermittent on-off valve 5 is closed, and the intermittent pressure is applied to the liquid supply path 4 between the pressure accumulator 7 and the liquid injection port 3a of the nozzle tube 3. The on-off valve 5 is interposed, and those common to FIG. 1 are denoted by the same reference numerals.

By configuring as in the second embodiment, the high pressure liquid discharged from the liquid pump 2 can be accumulated in the pressure accumulator 7 during the closing operation of the intermittent on-off valve 5, and the accumulated high pressure liquid can be stored. During the opening operation of the intermittent on-off valve 5, it is possible to instantly eject from the liquid ejection port 3a, and therefore, a small pump having a small ejection capacity while obtaining a predetermined ejection amount can be used. It can be provided at low cost.

In the above-described embodiment, the one for cleaning the object A to be cleaned in the air has been described, but in addition to the above, the third embodiment shown in FIG. 4 or the fourth embodiment shown in FIGS. 5 and 6 is used. Thus, the object A to be cleaned which is immersed in water may be cleaned.

In the third embodiment shown in FIG. 4, the liquid injection port 3a of the nozzle tube 3 is opened in the air, and the object A to be cleaned such as machined parts and repaired parts is immersed in the air. The high-pressure liquid is jetted into the water, and the high-pressure liquid is intermittently jetted into the water from the liquid jet port 3a by driving the liquid pump 2 and the operation of the intermittent on-off valve 5. When the jet flow F enters the water, the air in the air is entrained in the water from around the jet flow F by the jet force, and a bubble layer B is formed around the jet flow F. The object to be cleaned A is cleaned by colliding the air bubbles of the bubble layer B with the object A to be cleaned which is immersed in the water. Those common to FIG. 1 are denoted by the same reference numerals.

According to the cleaning method of the third embodiment, collision energy can be newly acted each time the high-pressure liquid is intermittently jetted, so that the jet stream and the air bubbles intermittently collide. The energy makes it easier to remove dirt. In addition, the jet flow F can be intermittently collided to remove the dirt in the collision area, and also the dust that is not collided with the jet flow F due to the ultrasonic waves when the bubbles collide and burst. Can be removed. Therefore, the cleaning range can be expanded,
Moreover, while the high-pressure liquid is sprayed into water for cleaning, the pressure drop of the spray flow F in water can be reduced by the bubble layer B around the spray flow F. It is possible to apply various collision energies, and it is possible to enhance the cleaning effect as compared with the case of simply spraying a high pressure liquid in the air for cleaning.

Further, in the cleaning apparatus of the fourth embodiment shown in FIGS. 5 and 6, the cleaning tank 8 in which the object to be cleaned A is filled with water.
And cleaning the object A to be cleaned by intermittently injecting a high-pressure liquid from the liquid injection port 3a of the nozzle tube 3, the cleaning tank 8 having an upward opening, and the nozzle The pipe 3 is provided with a nozzle support 9 that supports the liquid ejection port 3a so that the liquid ejection port 3a opens toward the object A to be cleaned which is immersed in the cleaning tank 8. It is indicated by a code.

The nozzle support 9 extends upward from the upper end of one side wall of the cleaning tank 8 toward the center of the cleaning tank 8, and the nozzle tube 3 is provided on the tip side of the support 9.
Is supported so that the liquid ejection port 3a opens toward the water surface, and the liquid ejection port 3a is opened in the air.

The nozzle tube 3 is supported on the nozzle support 9 by the jetting force F when the high-pressure liquid jetted into the liquid in the cleaning tank 8 enters the water from the air. A position in which air in the air is wound into water from around to form a bubble layer B around the jet flow F, and the jet flow F and the bubbles in the bubble layer B collide with the object to be cleaned A. Support. The nozzle tube 3 is
It is preferable to support the nozzle support 9 so that the injection port 3a of the nozzle tube 3 can move in a direction in which the injection port 3a approaches and separates from the object to be cleaned A immersed in the cleaning tank 8. In this case, for example, the nozzle support 9 is provided with a cylindrical nozzle tube support 9a,
A fastening screw 9b that can be inserted into the support portion 9a is attached to the nozzle pipe support portion 9a, the nozzle pipe 3 is inserted into and supported by the nozzle pipe support portion 9a, and the fastening screw 9b is tightened. The nozzle tube 3 is fixed in a positionally adjustable manner.

Further, on the other side wall of the cleaning tank 8, a rising wall 10 which projects upward is provided.
In addition, the lifting device 11 composed of an air cylinder is supported, and the intermediate portion of the piston rod 11a of the lifting device 11 is curved in an inverted U shape, and the cleaning object A is washed at the tip of the piston rod 11a. A cage-like holding body 12 for holding the tank 8 in water is connected via a guide body 13, and the holding body 12 is moved to the immersion position in water and the pulling position with respect to the water surface by the operation of the elevating device 11. I try to raise and lower it.

Further, as shown in FIG. 6, the cleaning tank 8 includes a scraping body 14 movable along the water surface between opposing side walls adjacent to the side wall on which the nozzle supporting body 9 is attached, and A dirt discharging means 16 including an air cylinder 15 for operating the scraping body 14 is provided.
By the operation of 5, the scraping body 14 is moved so that the floating dirt floating on the water surface of the cleaning tank 8 can be scratched along the water surface from the overflow portion 8a of the cleaning tank 8 to the recovery tank T. There is.

Further, as shown in FIG. 5, a heating means 17 comprising an electric heater for heating the water filled in the cleaning tank 8 is provided in the lower portion of the cleaning tank 8, and this heating means is provided. 1
7, the cleaning liquid can be heated to a predetermined temperature.

Next, the operation and cleaning method of the fourth embodiment will be described.

In the fourth embodiment, the object A to be cleaned is placed on the holding body 12 stopped at the pulling position, and the lifting device 1 is used.
1 is operated to lower the holding body 12 to the immersion position of the cleaning tank 8 to immerse the object A to be cleaned in water. And
The high-pressure liquid supplied from the liquid pump 2 is intermittently jetted from the liquid jet port 3a of the nozzle pipe 3 toward the article A to be washed into the water in the washing tank 8. When the jet flow F enters the water, the air in the air is entrained in the water from around the jet flow by the jet force, and the bubble layer B can be formed around the jet flow F. Therefore, not only the jet flow F can be made to collide and the dirt in the collision area can be removed, but also the dirt that is not collided by the jet flow F due to the ultrasonic waves when the bubbles collide and burst. Therefore, the cleaning range can be expanded, and while the high-pressure liquid is injected into water for cleaning, the pressure drop of the injection flow in water is caused by the bubble layer around the injection flow.
It can be made smaller than the case where the liquid injection port of the nozzle tube is opened in water for injection, and sufficient collision energy can be applied to the object to be cleaned, so high pressure liquid is simply injected in the air for cleaning. The cleaning efficiency can be made higher than that of the conventional one. Further, when the air bubbles trapped in the water rise, it is possible to raise dirt such as oil removed from the material to be cleaned A, and by discharging this dirt from the upper part of the cleaning tank 8, the waste collection processing can be performed. It can be done easily.

The nozzle tube 3 is connected to the nozzle support 9
On the other hand, by making the injection port 3a of the nozzle tube 3 movable in a direction in which it approaches and separates from the object A to be cleaned immersed in the cleaning tank 8, the amount of water in the cleaning tank 8 and the immersion position of the object to be cleaned can be changed. The support position of the nozzle tube 3 can be adjusted.
Since it is possible to arbitrarily change the distance from the injection port 3a to the water surface, it is possible to increase the amount of air entrained when injecting the high-pressure liquid from the injection port 3a into the water, and relatively large bubbles around the injection flow. Can be generated, and the cleaning range can be widened accordingly.

The object A to be cleaned is the lifting device 1
1 can be moved up and down between the immersion position and the pulling up position, so that the object A to be cleaned can be immersed in water and pulled up easily, and the object A to be cleaned can be easily moved. When pulling up the water against the water surface, the air cylinder 15 of the waste discharging means 16 is operated to move the scraping body 14
After scraping floating wastes floating on the water surface of the cleaning tank 8 from the overflow section 8a of the cleaning tank 8 to the recovery tank T along the water surface, the lifting device 11 is operated to pull up the holding body 12. By pulling it up to the position, it is possible to prevent the object A to be cleaned, which has been cleaned in water, from being contaminated with dirt floating on the water surface.

Further, since the cleaning liquid in the cleaning tank 8 can be heated to a predetermined temperature by the heating means 17, by heating the object A to be cleaned immersed in this heating liquid,
It is possible to more easily remove the stains on the object to be cleaned A. Therefore,
Since it is possible to cause the jet flow F and the bubbles of the bubble layer B to collide with the object A to be cleaned, which has become easier to peel off, and to clean, the cleaning efficiency can be further enhanced.

[0042]

As described above, according to the first aspect of the invention, the high pressure liquid of the liquid pump 2 and the nozzle pipe 3 having the liquid jet port 3a for jetting the high pressure liquid discharged from the pump 2 A high-pressure liquid is intermittently ejected from the ejection port 3a of the nozzle tube 3 by using an ejection device to intermittently collide the high-pressure liquid with the object to be cleaned, and the collision energy is used to clean the object to be cleaned. Therefore, in the case of cleaning over a predetermined range, the collision energy of the high-pressure liquid can be made to act on the object to be cleaned intermittently, and new collision energy can be made to act each time the high-pressure liquid is intermittently jetted. As a result, the dirt can be effectively removed, and the cleaning efficiency can be improved.

According to the second aspect of the invention, the liquid jet port 3a is opened in the air to jet a high-pressure liquid from the air into the water in which the object to be cleaned is immersed, and the high pressure liquid is discharged. When the jet flow of liquid enters the water, air is entrained around the jet flow, and a bubble layer is formed around the jet flow to separate the jet flow and the bubbles in the bubble layer. Since the object to be cleaned immersed in the water is intermittently collided to clean the object to be cleaned, collision energy can be newly applied each time the high-pressure liquid is intermittently jetted. Therefore, the intermittent collision energy between the jet flow and the bubbles makes it easier to remove the dirt, and moreover, the high pressure liquid does not collide with the ultrasonic waves when the bubbles collide and burst. It is also possible to remove stains on parts It is kill the. Moreover, while the high-pressure liquid is jetted into water for cleaning, the pressure drop of the high-pressure liquid in water is jetted by opening the liquid jet port of the nozzle pipe into the water due to the bubble layer around the high-pressure liquid. Since it can be made smaller than that in the case of performing the above, and sufficient collision energy can be applied to the object to be cleaned, in combination with the intermittent injection and the ultrasonic wave, the method for injecting a high pressure liquid in an air atmosphere for cleaning In comparison, the cleaning efficiency can be increased.

According to the third aspect of the present invention, the liquid pump 2 and the nozzle tube 3 having the liquid jet port 3a for jetting the high-pressure liquid discharged from the pump 2 are provided, and the liquid pump 2 discharges the liquid. Since the intermittent liquid supply means for intermittently supplying the high-pressure liquid to the liquid injection port 3a of the nozzle pipe 3 is provided, the existing liquid pump can be used, but the high-pressure liquid is intermittently injected from the injection port. Therefore, it is possible to provide the whole at low cost.

According to the fourth aspect of the invention, a pressure accumulator 7 for accumulating the high pressure liquid is provided in the middle of the liquid supply path 4 for supplying the high pressure liquid discharged from the liquid pump 2 to the nozzle tube 3. , This pressure accumulator 7 and the liquid injection port 3 of the nozzle tube 3
Since the intermittent on-off valve 5 that intermittently supplies the high-pressure liquid to the liquid ejection port 3a is interposed between the pump 2 and
The high-pressure liquid discharged from the accumulator can be accumulated in the pressure accumulator 7, and the accumulated high-pressure liquid can be instantaneously ejected from the ejection port 3a. Therefore, the ejection volume is small while the predetermined ejection amount is obtained. A small pump can be used, and it can be made inexpensive.

According to the fifth aspect of the present invention, the cleaning tank 8 for immersing the object to be cleaned and the nozzle tube 3 are arranged so that the liquid jet port 3a thereof faces the object to be cleaned immersed in the cleaning tank 8. A nozzle support 9 which is supported so as to be open, and the injection port 3a of the nozzle pipe 3 is open in the air, and the nozzle pipe 3 is directed to the nozzle support 9 in the water of the cleaning tank 8. When the high-pressure liquid to be jetted by entering into the water from the air, the air around the jet flow of the high-pressure liquid is entrained to form a bubble layer around the jet flow, and the jet flow and the bubble layer Since the air bubbles are supported at the position where they collide with the object to be cleaned, the object to be cleaned can be immersed in the cleaning tank 8 to cause the jet flow and the bubbles to collide with each other to clean the object to be cleaned. Cleaning can be performed in a wider area than the area where the jet flow collides, and the cleaning efficiency can be improved. Moreover, since the high-pressure liquid is sprayed into the water in the cleaning tank 8 to generate bubbles, when the bubbles rise to the water surface, it is possible to raise the contaminants such as oil removed from the object to be washed to the water surface. Therefore, as compared with the cleaning by jetting the high-pressure liquid in the air atmosphere, the filth recovery process becomes easier.

According to the sixth aspect of the present invention, the object to be cleaned in which the nozzle pipe 3 supported by the nozzle support 9 is immersed in the cleaning tank 8 with the injection port 3a of the nozzle pipe 3 with respect to the nozzle support 9. Since it can be moved in the direction of approaching and separating from it, the support position of the nozzle tube 3 can be adjusted according to the amount of water in the cleaning tank 8 and the immersion position of the object to be cleaned.
It is possible to arbitrarily change the distance from a to the water surface. Therefore, the amount of air entrained when injecting the high-pressure liquid from the injection port 3a into the water can be increased, and relatively large bubbles around the injection flow can be obtained. Can be generated, and the cleaning range can be widened accordingly.

[Brief description of drawings]

FIG. 1 is a schematic view showing a first embodiment of a cleaning device of the present invention.

FIG. 2 is an explanatory view showing another embodiment of the intermittent liquid supply means.

FIG. 3 is a schematic diagram showing a second embodiment.

FIG. 4 is a schematic diagram showing a third embodiment.

FIG. 5 is a schematic sectional view showing a fourth embodiment.

FIG. 6 is a sectional view taken along line XX in FIG.

[Explanation of symbols]

 2 Liquid pump 3 Nozzle pipe 3a Liquid injection port 4 Liquid supply path 5 Intermittent on-off valve 7 Accumulator 8 Cleaning tank 9 Nozzle support

Claims (6)

[Claims] 1. A high-pressure liquid injection device comprising a liquid pump (2) and a nozzle pipe (3) having a liquid injection port (3a) for injecting high-pressure liquid discharged from the pump (2), The high pressure liquid is intermittently ejected from the ejection port (3a) of the nozzle pipe (3) to intermittently collide the high pressure liquid with the object to be cleaned, and the collision energy is used to clean the object to be cleaned. How to wash. 2. A method of cleaning an object to be cleaned, which is immersed in water, wherein a liquid injection port (3a) is opened in the air, and a high-pressure liquid is introduced from the air into the water in which the object to be cleaned is immersed. When the jet stream of the high-pressure liquid enters the water, air is entrained around the jet stream, and a bubble layer is formed around the jet stream to form the jet stream. The cleaning method according to claim 1, wherein the object to be cleaned is washed by intermittently colliding the air bubbles in the bubble layer with the object to be immersed in the water. 3. A liquid pump (2) comprising a liquid pump (2) and a nozzle pipe (3) having a liquid injection port (3a) for injecting a high-pressure liquid discharged from the pump (2). The high-pressure liquid to be discharged into the liquid jet port (3a) of the nozzle pipe (3)
A cleaning device, characterized in that intermittent cleaning liquid supply means for intermittently supplying the cleaning device is provided. 4. A pressure accumulator (7) for accumulating the high pressure liquid is provided in the middle of a liquid supply passage (4) for supplying the high pressure liquid discharged from the liquid pump (2) to the nozzle pipe (3). An intermittent on-off valve (5) for intermittently supplying the high-pressure liquid to the liquid injection port (3a) is interposed between the pressure accumulator (7) and the liquid injection port (3a) of the nozzle pipe (3). The cleaning device according to claim 3. 5. A cleaning tank (8) for immersing an object to be cleaned and a nozzle pipe (3) are opened such that liquid injection ports (3a) thereof face the object to be cleaned immersed in the cleaning tank (8). And a nozzle support (9) for supporting the nozzle pipe (3), and the injection port (3a) of the nozzle pipe (3) is open in the air, and the nozzle pipe (3) is connected to the nozzle support (9). When the high-pressure liquid jetted into the water in the cleaning tank (8) enters the water from the air, the air around the jet stream of the high-pressure liquid is entrained to form a bubble layer around the jet stream. 4. The cleaning device according to claim 3, wherein the cleaning unit is supported at a position where the jet flow and the bubbles in the bubble layer collide with the object to be cleaned. 6. A nozzle tube (3) supported by a nozzle support (9), wherein an injection port (3a) of the nozzle tube (3) is immersed in a cleaning tank (8) with respect to the nozzle support (9). The cleaning device according to claim 3, wherein the cleaning device is movable in a direction of approaching and separating from a cleaning object.