JP2000070878A - Gas-liquid mixed jet type cleaning device for blind-hole cleaning - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clean a blind-hole inner peripheral face by forming a plurality of auxiliary cleaning holes at intervals on a cylindrical wall of a nozzle end section and jetting a gas-liquid mixed cleaning liquid from auxiliary cleaning holes toward the blind-hole inner peripheral face when a nozzle tip jet opening is in the closed state or half-closed state on a blind-hole bottom face. SOLUTION: A nozzle 12 is formed of a narrow and long stainless cylindrical member of 1-3 mm diameter. When auxiliary cleaning holes 16 are formed at intervals in the peripheral direction on a cylindrical wall of the tip of the nozzle 12 and tip jet opening 17 of the nozzle 12 is set in the closed state or the half-closed state, a gas-liquid mixed cleaning liquid is jetted out of the auxiliary cleaning holes 16 to clean the blind-hole peripheral face. Namely, the auxiliary cleaning holes 16 are of the opening dimension of not jetting the cleaning liquid when the tip jet opening 17 is released and is preferably formed of an arc-shaped slit 16' extended in the peripheral direction of the cylindrical wall. The cleaning liquid can be utilized effectively not only on the blind-hole inner bottom face but also on the inner peripheral face by this arrangement.

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 the inner bottom surface and inner peripheral surface of a blind hole by inserting a nozzle formed of an elongated cylindrical body into a blind hole and spraying a gas-liquid mixed cleaning liquid from a nozzle at a tip end of the nozzle. The present invention relates to a gas-liquid mixed jet type cleaning device for cleaning a blind hole.

[0002]

2. Description of the Related Art In the conventional spraying of a cleaning liquid from a tip end of a nozzle, the cleaning of the inner bottom surface of the blind hole can be effectively performed, but the cleaning liquid cannot be effectively applied to the inner peripheral surface of the blind hole, resulting in poor cleaning. Had a problem.

[0003]

The cleaning liquid is made to act effectively not only on the inner bottom surface of the blind hole but also on the inner peripheral surface of the blind hole.
This is to solve the problem of poor cleaning.

[0004]

At the tip of a nozzle formed of an elongated cylindrical body, a plurality of auxiliary cleaning holes formed by an arc-shaped slit extending in the circumferential direction with respect to the cylindrical wall are provided at intervals. Set up. The arc-shaped slit is oriented so that the cleaning liquid can be jetted perpendicularly or obliquely to the axis of the nozzle, and when the nozzle at the tip of the nozzle is closed or semi-closed at the bottom of the bag hole, a bag is opened from this slit. By spraying the gas-liquid mixed cleaning liquid toward the inner peripheral surface of the hole, the inner peripheral surface of the blind hole can be mainly cleaned, and when the injection port at the tip of the nozzle is opened, the inner bottom surface of the blind hole can be mainly cleaned.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gas-liquid mixing / injection type cleaning apparatus for cleaning a blind hole will be described with reference to the drawings. FIG. 1 is a perspective view when the nozzle device (1) is connected to the bubble mixer (2) to make the gas-liquid mixing / injection type cleaning device for cleaning the blind hole clean available. FIG. 2 is an embodiment simulating a piping diagram of a portion related to the operation of the present invention. The cleaning liquid (6) sucked from the cleaning tank (5) through the suction port (3) at the tip of the suction tube (4) is introduced into the main pipe (7) of the gas-liquid mixer to which the suction tube (4) is connected. , Overflow control valve (8) at outlet end of main pipe (7)
The washing liquid (6) that has been diverted to the branch pipes (9) and (10) provided through the nozzle and flows into one of the branch pipes (9) passes through the nozzle connection tube (11) connected to the branch pipe (9). It is supplied to the nozzle device (1) and is jetted from the nozzle (12). On the other hand, the overflow cleaning liquid (6) flowing into the branch pipe (10) is supplied to the branch pipe (1).
It is refluxed into the washing tank (5) through a reflux tube (13) connected to (0). Further, a bubble supply pipe (14) is connected to the main pipe (7), and a gas-liquid mixed cleaning liquid (6) is supplied to the nozzle device (1) via the branch pipe (9). The nozzle (12) is made of a slender stainless steel cylinder having a diameter of 1 mm to 3 mm.
A metal pipe having an angle of 90 to 160 degrees is connected between 2) and the grip portion (15). As shown in FIGS. 3 to 7, a plurality of auxiliary cleaning holes (16) are provided in the cylindrical wall at the tip of the nozzle (12) at intervals in the circumferential direction so as to penetrate the nozzle (12). When 17) is closed or semi-closed on the bottom surface of the blind hole, a gas-liquid mixed cleaning liquid is injected from the auxiliary cleaning hole (16) to clean the inner peripheral surface of the blind hole. That is, the auxiliary cleaning hole (16) is a cleaning hole having an opening dimension that does not spray the cleaning liquid when the tip injection port (17) is open, and the plurality of auxiliary cleaning holes (16) as a preferred example are , Are formed by arc-shaped slits (16 ') extending in the circumferential direction of the cylindrical wall. FIG. 4AB is a cross-sectional view showing a state where the blind hole (18) is being cleaned by the nozzle (12). FIG. 4A shows a cleaned state of the inner bottom surface of the blind hole, and FIG. Is shown. Items to be cleaned typified by cap screws (19)
Penetrates into the washing tank (5), and the nozzle (12) is inserted into the blind hole (18) in the washing tank (5). As shown in FIG. 4A, a cleaning liquid for gas-liquid mixing flowing in the nozzle (6)
Is sprayed from the tip injection port (17) of the nozzle, reaches the bottom surface of the blind hole while cleaning the inside of the blind hole, and mainly cleans the bottom surface of the blind hole. The cleaning liquid (6) sent from the gas-liquid mixer (2) seeks an outlet instead of the tip injection port (17),
Multiple arc-shaped slits (16 ') provided at the nozzle tip
And is used to clean the inner peripheral surface of the blind hole. By repeating this operation several times, the object to be cleaned (1) in the cleaning tank (5) is
In the bag hole (18) of (9), a gas-liquid mixed type cleaning liquid (6) to which bubbles (20) that burst one after another simultaneously with the injection are added.
Is sprayed in multiple directions by a plurality of arc-shaped slits (16 ') provided in the cylinder wall at the tip of the nozzle at intervals in the circumferential direction so as to wash not only the inner bottom surface of the blind hole but also the inner circumferential surface of the blind hole. I do. FIG. 5 is an enlarged view showing a state in which a middle portion of the nozzle tip is omitted. ABC in FIG. 6 is a cross-sectional view taken along the line AA in FIG. 5, and shows an example of an arc-shaped slit (16 ') orientation. FIG. 6A shows the arc-shaped slit (16 '),
FIGS. 6B and 6C show examples in which the cleaning liquid (6) is oriented so as to be able to eject the cleaning liquid (6) obliquely with respect to the axis of the nozzle. FIG. 7 is a sectional view taken along line BB in FIG. The circumference of the arc-shaped slit (16 ') at the nozzle tip is one third of the circumference of the nozzle. That is, the angle W is 120
It is formed with a degree of expansion. Further, as shown by the dimension P in FIG. 5, at least a gap between the arc-shaped slit (16 ') extending in the circumferential direction of the cylinder wall at the nozzle tip and another arc-shaped slit (16') is provided. The configuration is such that an interval of 3 mm or more is provided.

[0006]

According to the present invention, the problem of poor cleaning of the blind hole can be solved by effectively applying the cleaning liquid not only on the inner bottom surface of the blind hole but also on the inner peripheral surface of the blind hole. Such a cleaning method is suitable for removing cutting chips attached to the back of the cap screw or the valley of the pitch of the screw.

[Brief description of the drawings]

FIG. 1 is a perspective view of the present cleaning apparatus.

FIG. 2 is a piping diagram in FIG.

FIG. 3 is a perspective view of a nozzle device.

FIG. 4 is an enlarged vertical cross-sectional view of the nozzle, where A is a view in which the nozzle at the tip of the nozzle is open, and B is when the nozzle at the tip of the nozzle is closed or semi-closed at the bottom of the blind hole. Figure.

FIG. 5 is an enlarged vertical sectional view showing a part of a nozzle tip omitted.

FIGS. 6A, 6B, and 6C are enlarged longitudinal sectional views illustrating examples of slit orientation in a nozzle.

FIG. 7 is an enlarged cross-sectional view of the nozzle.

[Explanation of symbols]

 1 is a nozzle device section 2 is a bubble mixer 3 is a suction port 4 is a suction tube 5 is a cleaning tank 6 is a cleaning liquid 7 is a main pipe 8 is an overflow regulating valve 9 is a branch pipe 10 is a branch pipe 11 is a nozzle connecting tube 12 is a nozzle 13 Is a reflux tube 14 is a bubble supply tube 15 is a gripping portion 16 is an auxiliary cleaning hole 16 ′ is an arc-shaped slit 17 is a tip injection port 18 is a bag hole 19 is an object to be cleaned 20 is a bubble

Claims (4)

[Claims] 1. A nozzle for cleaning a blind hole in which a nozzle formed of an elongated cylindrical body is inserted into a blind hole, and a gas-liquid mixed cleaning liquid is sprayed from an injection port at the tip of the nozzle to wash the inner bottom surface and inner peripheral surface of the blind hole. In the gas-liquid mixed-injection type washing apparatus, a plurality of auxiliary washing holes are provided in the cylinder wall at the tip end of the nozzle at intervals in the circumferential direction, and the tip injection port of the nozzle is closed or semi-closed at the bottom of the blind hole. A gas-liquid mixed cleaning liquid for the blind hole cleaning, wherein a gas-liquid mixed cleaning liquid is sprayed from the auxiliary cleaning hole when the state is in a state to clean the inner peripheral surface of the blind hole. 2. As a preferred example, the plurality of auxiliary cleaning holes are formed by arc-shaped slits extending in the circumferential direction of the cylinder wall, and the arc-shaped slits are arranged so as to be displaced in the axial direction of the nozzle. The gas-liquid mixed jet type cleaning apparatus for bag hole cleaning according to claim 1, characterized in that: 3. The gas-liquid mixed jet type cleaning apparatus for cleaning a blind hole according to claim 2, wherein the arc-shaped slit is oriented so that the cleaning liquid can be jetted obliquely with respect to the axis of the nozzle. 4. A gas-liquid mixed jet type cleaning apparatus for cleaning a blind hole according to claim 2, wherein the arc-shaped slit is oriented so as to be able to jet the cleaning liquid perpendicularly to the axis of the nozzle.