JP2852191B2 - Nozzle device of aeration mechanism, member cleaning device, and water treatment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle device of an aeration mechanism and a member cleaning device using the nozzle device.

[0002]

2. Description of the Related Art When a machine part is manufactured by machining such as cutting or polishing, a member to be processed includes cutting oil and polishing liquid as well as cutting powder and polishing powder generated by the processing. Since powdery deposits adhere, it is necessary to remove them after processing. In such a case, the processed member is immersed in a cleaning liquid such as kerosene, and air bubbles are sprayed by an aeration mechanism to remove and remove the attached matter. As such an aeration mechanism, for example, a mechanism provided with a nozzle device for providing a large number of injection holes on the surface of a hollow body, introducing compressed air into the inside thereof, and injecting air from the injection holes to generate bubbles is used. ing.

[0003]

In the above-mentioned nozzle device, for example, when a compressed gas source such as a pump or a compressor for supplying a compressed gas to the nozzle device is stopped, the inner space of the hollow body is temporarily negative. At this time, a contaminant such as an abrasive powder which drops off from the member to be cleaned and floats in the liquid may be sucked from the injection hole. In such a case, contaminants are clogged in the injection holes to cause an increase in the pressure inside the hollow body, which not only places a burden on the compressed gas source, but also requires the hollow body to have a pressure-resistant structure using a thick plate material. For example, the weight and cost of the nozzle device are increased. In addition, in the case of cleaning a member to which an adhered substance such as cutting powder is adhered, for example, a large amount of the extraneous matter that has fallen from the member penetrates into the inside of the hollow body to fill up the inner space, and the injection hole becomes Can be blocked by a similar problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide a nozzle device of an aeration mechanism having a structure in which the internal pressure of a hollow body is hard to rise and capable of spraying air bubbles smoothly and uniformly, and a member cleaning device using the nozzle device. It is in.

[0005]

The nozzle device according to the present invention comprises:
The present invention relates to a nozzle device of an aeration mechanism that injects air bubbles into a liquid and aerates the air bubbles. In order to solve the above-described problem, a compressed gas such as air is introduced into an inner space of a hollow body. On the upper surface side, a large number of injection holes for injecting the compressed gas introduced into the space are provided, while on the lower surface side, a bottom hole larger than each of the injection holes is formed. The hollow body can be formed into various shapes, for example, a plate shape that is supported substantially horizontally in a liquid.

[0006] In the inner space of the hollow body, a tube is provided so as to form a predetermined path, the compressed gas is guided along the path, and the tubular wall communicates with the inner space. May be formed, and may include a gas guide passage that supplies the gas guided along the path into the space through the communication part. The gas guide passage may be fixed to at least one of the inner upper surface and the lower surface of the hollow body, and may also serve as a reinforcing member for reinforcing the hollow body. The gas guide passage may have a rectangular cross section, and the communication portion may be a through hole formed at a predetermined interval in a side wall thereof.

[0007] The nozzle device as described above is suitably used for a member cleaning device, particularly, a device for removing and cleaning the adhered substance from the member to which the powdery adhered substance is adhered. Can be. In this case, the cleaning device
A cleaning tank that contains the cleaning liquid and in which the member is immersed, and the nozzle device that is installed in the cleaning liquid in the cleaning tank and that injects air bubbles to the member to drop off the attached matter, and pressurized gas to the nozzle device. And a source of compressed gas to be supplied. In this case, the nozzle device can be arranged, for example, near the bottom inside the cleaning tank.

Further, the nozzle device can be suitably used for an aeration mechanism of a water treatment device for treating water such as livestock wastewater and domestic wastewater. In this case, the water treatment apparatus is disposed in a treatment tank in which water to be treated is stored and in water stored in the treatment tank, and injects a gas such as air or oxygen into the water to aerate the water. The nozzle device and the compressed gas source for supplying a compressed gas to the nozzle device can be configured. The nozzle device can be arranged, for example, near the bottom inside the processing tank. Further, the nozzle device can be made of a corrosion-resistant material such as stainless steel.

[0009]

According to the nozzle device of the aeration mechanism of the present invention, an injection hole is provided on the upper surface side of the hollow body into which the compressed gas is introduced into the inner space, and the injection hole is provided on the lower surface side more than the respective injection holes. A large bottom hole is formed, and even if some of the injection holes are blocked by impurities in the liquid to be aerated, the gas introduced into the inner space can escape from the bottom hole. Therefore, the pressure rise inside the hollow body is suppressed, and the gas is blown out from the unblocked injection holes uniformly and smoothly. Further, the thickness of the hollow body can be reduced, and the weight or cost can be reduced. Furthermore, even if the contaminant enters the inner space from the injection hole, it can be discharged from the bottom hole, so that the problem that the inside of the hollow body is filled with contaminants can be avoided. .

According to the structure in which the gas guide passage is provided in the inner space of the hollow body, the compressed air is guided by the passage along the predetermined path to each part of the inner space, and further the space is communicated from the communication portion to the space. Since it is supplied to the inside of the section, the pressure of the gas inside the hollow body, and furthermore, the ejection of the gas from the injection hole can be made uniform and smooth.

The above-described nozzle device is suitably used for an aeration mechanism of a member cleaning device or a water treatment device. Due to the above-described effects, the nozzle device removes dropped matter from a member to be cleaned and trash and dirt in water to be treated. Since it is less likely to be adversely affected by contaminants, it is possible to configure a cleaning device having an excellent cleaning effect or efficiency or a water treatment device having an excellent aeration effect.

[0012]

【Example】

(Embodiment 1) An embodiment of a member cleaning apparatus using a nozzle device of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the member cleaning apparatus 1 includes a cleaning tank 2 that stores a cleaning liquid L, an aeration mechanism 3 that generates bubbles in the cleaning liquid L and aerates the bubbles. The aeration mechanism 3 includes a nozzle device N disposed near the bottom of the cleaning tank 2 and a compressor such as a compressor or a pump that supplies a compressed gas such as air to the nozzle device N through a gas supply pipe 5 such as a hose or a pipe. It is provided with a gas source 6 and the like. Reference numeral 7 denotes a heater for keeping the cleaning liquid L at a predetermined temperature.

The nozzle device N is provided with a hollow body 4 made of, for example, a steel plate or an aluminum plate. The nozzle device N is substantially horizontal with a bottom surface thereof being separated from the bottom of the cleaning tank 2 by a predetermined height by a spacer 8 in the cleaning liquid L. Supported by
The gas from the compressed gas source 6 is introduced into the inner space 4b from the gas inlet 4a formed in the side surface. As shown in FIG. 2, a large number of injection holes 9 penetrating in the thickness direction are formed substantially uniformly in the upper surface portion 4c (upper surface side), while, as shown in FIG.
(Lower surface side) a bottom hole 10 larger than these injection holes 9
Are formed. Here, as shown in FIG. 4, the hollow body 4 is formed by, for example, bending an edge of a plate material forming the upper surface 4c downward to form a side surface 4e, and further bending the lower edge further inward. It can be formed by joining a plate member constituting the bottom surface portion 4d to the joint portion 4f using a fastening member 4g such as a bolt. Further, it may be formed by joining plate members by welding or brazing.

Next, as shown in FIG. 5, a gas guide passage (hereinafter simply referred to as a guide passage) is provided in the inner space 4b of the hollow body 4. The guide passage portion 11 is formed in a tubular shape having a square cross-section by, for example, bending a plate material, and as shown in FIG. 6, the inner surface of the bottom surface portion 4d is positioned near the center of the plate surface along the long side direction thereof. It has a main passage 11a to be arranged, and a branch passage 11b communicating with the main passage 11a and branching laterally. These passages 11
7a and 11b are formed by bending a plate material or the like.
As shown in the figure, at the joint portion 11c formed by bending the lower edge portion outward, it is fastened to the bottom surface portion 4d by a fastening member 11d such as a screw or a rivet, and also serves as a reinforcing member of the hollow body 4. It has become. As shown in FIG. 6, one bottom hole 10 is formed in each of the regions of the bottom surface 4d separated by the passages 11a and 11b.

As shown in FIG. 8, the gas inlet 4a is formed by a joint member 12 provided at a position corresponding to the entrance of the main passage 11a on the side surface 4e of the hollow body 4, and a compressed gas source 6 is formed. The gas from FIG. 1 is blown into the main passage 11a. As shown in FIG. 5 (or FIGS. 7 and 8), the main body 11a and the branch passage 11b are respectively provided with hollow bodies 4 on both side surfaces thereof.
A plurality of through-holes 13 are formed at predetermined intervals as communication parts with the inner space 4b. Thereby, the gas from the compressed gas source 6 is guided along the path formed by the passages 11a and 11b, and is supplied from the respective through holes 13 to various portions of the inner space 4b. L will be ejected.

Hereinafter, the operation of the member cleaning device 1 will be described. First, the members to be cleaned are various mechanical parts and structural members, and are formed through machining such as cutting and polishing, and the surface thereof is in the form of powder such as cutting powder or grinding stone powder accompanying the above-mentioned machining. Deposits are attached. For example, as shown in FIG. 9, a long pipe 14 is cut with a cutter 15,
When it is intended to obtain a pipe member 16 of a predetermined length with both ends open, burrs 17 are formed on the cut surface as shown in FIG. The burrs 17 are often removed by polishing or cutting such as grinding with a grinder or barrel polishing, for example.
As shown in FIG. 10 (b), the attachments 18 such as cutting powder and grinding stone powder adhere to the surface (particularly, the outer peripheral surface and the inner peripheral surface) of the member 16 with this processing.

The cleaning process of the member 16 is described in FIG.
First, the pipe members 16 are bundled so that their longitudinal directions are substantially parallel to each other, tied with a flexible member 19 such as a string, a wire, or a belt. The above-mentioned longitudinal direction is put in the basket 20 thus constituted. As shown in FIG. 12, the basket 20 containing the pipe member 16 is
In a state of being suspended by 1 or the like, it is immersed in the cleaning liquid L of the cleaning tank 2. Here, when the pipe member 16 is made of, for example, aluminum or an alloy thereof, and the attached matter 18 is mainly made of the chips, the cleaning liquid L is mainly made of, for example, kerosene (kerosene). It can be suitably used. Further, the basket 17 may be provided with a hook portion near its upper portion, and the hook portion is supported by the upper edge of the washing tank 2.

Next, the pipe member 16 immersed in the cleaning liquid L is blown from the injection hole 9 of the nozzle device N in a direction substantially along the longitudinal direction from one end side (lower side) thereof.
Inject. Due to the injection of the bubble B, the attached matter 18 of the member 16 drops and falls. Pipe member 1 as described above
6, the air bubbles B on the inner peripheral surface of the member 16
And the efficiency of removing the attached matter 18 is improved.

As shown in FIG. 13A, while the bubbles B are being ejected from the ejection holes 9,
Although it is floating inside, when the ejection of the bubble B is stopped, it may fall onto the upper surface 4c of the hollow body 4 and clog the injection hole 9. In particular, as shown in FIG. 13B, immediately after the stop of the compressed gas source 6 (FIG. 1), the inside of the hollow body 4 may be temporarily in a negative pressure state, and
At the same time, it is sucked into the inner space 4 b of the hollow body 4, and the deposits 18 tend to be easily clogged in the injection holes 9.

When the supply of gas to the hollow body 4 is resumed in this state, as shown in FIG. 14A, it becomes difficult for the bubbles B to be ejected from the clogged ejection holes 9a. Here, if the gas outlet portion other than the injection hole 9 is not formed in the hollow body 4, the pressure inside the hollow body 4 will increase,
In the nozzle device N of the present invention, the bottom portion 4 of the hollow body 4
A bottom hole 10 is formed in d, and pressure can be released from the bottom hole 10. As a result, the internal pressure of the hollow body 4 does not rise above a predetermined value, the load on the compressed gas source 6 is reduced, and the pressure at which the gas is injected from the unfilled injection holes 9 can be maintained stably. A uniform cleaning effect can be obtained. Further, as shown in FIG. 14B, when the inside of the hollow body 4 is in a negative pressure state, the deposit 18
There may be a case where the adhering substance 1 is sucked from the inside and enters the inside space portion 4b.
Since the material 8 is discharged from the bottom hole 10, it is possible to prevent or suppress the deposit 18 from being deposited inside the hollow body 4.

Here, the size of the injection hole 9 can be appropriately set in consideration of the pressure of the gas injection and the size of the deposits. For example, when cleaning an aluminum pipe member,
When the gas introduction pressure is about 4 to 6 kgf / cm ² and the average particle diameter of the attached matter is, for example, about 100 to 2000 μm, holes having a diameter of about 0.3 to 3.0 mm are formed at a rate of 1000 per m ^2.
It is good to form it at a rate of about 10,000 to 10,000, preferably about 3000 to 7000. The size and number of the bottom holes 10 are set so that when the pressure in the hollow body 4 is equal to or less than a predetermined value, bubbles that counteract the buoyancy in the cleaning liquid L do not occur. When formed under the above-described conditions, it is preferable to form a layer having a diameter of about 5 to 50 mm at a rate of about 10 to 30 pieces, preferably about 15 to 25 pieces per 1 m ² . In addition, the shape of the injection hole 9 and the bottom hole 10 is not limited to a circular shape, and may be formed into various shapes such as a square, other polygons, a cross, and an oval.

Here, as shown in FIG. 5, a gas guide passage portion 11 is provided inside the hollow body 4, and is introduced into the hollow body 4 from the gas inlet 4a as shown in FIG. The gas is supplied to the inside of the inner space 4b along the guide passage 11 without being dispersed, so that the air bubbles are uniformly jetted from each of the injection holes 9 and the cleaning efficiency is improved. As shown in FIG. 15, the guide passage portion 11 is
1a is provided near the end of the inner space portion 4b, from which the branch passage 11b is branched in a comb shape, or as shown in FIG. 16, one passage portion 11 is formed by appropriately bending or bending. Is possible. Further, the cross-sectional shape is not limited to a square shape, but may be a circular shape or a pipe shape having another cross section. Further, the gas guide passage portion 11
May be fixed to the inner upper surface of the hollow body 4 or not fixed to either the upper surface or the lower surface.

The hollow body 4 is not limited to the square plate shape shown in FIG. 2 and the like, and can be formed in various planar shapes. For example, when the shape of the cleaning tank is circular, the cleaning tank can be configured to have a circular planar shape. Also,
The upper surface portion 4c and the bottom surface portion 4d of the hollow body 4 may be formed in a convex shape, a concave shape, or another curved shape, in addition to the flat shape. Further, as shown in FIG. 17, it is also possible to form a ring or a donut.

(Embodiment 2) FIG. 18 schematically shows an example of the water treatment apparatus of the present invention. Water treatment device 20
Is provided with a treatment tank 21 in which water W to be treated such as livestock wastewater or domestic wastewater is stored, and an aeration mechanism 3 for injecting gas such as air or oxygen to the water W to aerate the water W. .
The aeration mechanism 3 is configured similarly to the member cleaning device 1 of the first embodiment, but the hollow body 4 and the like of the nozzle device N are formed of a corrosion-resistant material such as stainless steel.

The inside of the treatment tank 21 is partitioned by a partition 21 a, one of which is a first sedimentation chamber 22 and the other is a second sedimentation chamber 23. 22. Also, partition 2
A communication hole 21b is formed in 1a, and the first and second settling chambers 22 and 23 communicate with each other in the communication hole 21b. A disinfection chamber 26 is provided above the second precipitation chamber 23 and accommodates a chlorine source 27 such as a solid chlorine agent. The nozzle device N is disposed substantially horizontally using a spacer 8 near the inner bottom of the first settling chamber 22, and air is supplied from a compressed gas source 6 such as a compressor.

The water W introduced into the first settling chamber 22 is aerated by receiving the injection of air A from the injection holes 9 on the upper surface of the nozzle device N. Here, when the water W is livestock wastewater and domestic wastewater, there are cases where a large amount of foreign substances R such as dirt and garbage are contained. Even if it is blocked, the internal pressure of the hollow body 4 is prevented from rising, and the pressure of the air A from the unblocked injection holes 9 can be stably maintained, so that a uniform aeration effect can be obtained. Further, even if the contaminant R is sucked into the hollow body 4 from the injection hole 9, it is discharged from the bottom hole 10, so that the contaminant R is prevented or suppressed from accumulating inside.
Further, since the hollow body 4 is made of a corrosion resistant material,
It has good durability even in water W containing corrosive components (human waste components, ammonia, etc.).

The aerated water W enters the second sedimentation chamber 23 through the flow hole 21b of the partition wall 21a, precipitates the impurities R, and then overflows to the disinfection chamber 26 where it is generated by the chlorine generation source 27. After being chlorinated, it flows out from the outlet 28.

The nozzle device of the present invention is not limited to a member washing device and a water treatment device, but is provided in an aeration device for supplying air to a fish tank or the like, or in a bathtub, and jets airflow to a bather to massage. The present invention can also be applied to an airflow injection device or the like for performing the above.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an example of a member cleaning device of the present invention.

FIG. 2 is a plan view of the nozzle device.

FIG. 3 is a bottom view of the same.

FIG. 4 is a side sectional view of the vicinity of the side end.

FIG. 5 is a perspective view showing the internal structure of the nozzle device.

FIG. 6 is a plan view showing the internal structure of the nozzle device.

FIG. 7 is a cross-sectional view of a gas guide passage.

FIG. 8 is a cross-sectional view around a gas inlet of the nozzle device.

FIG. 9 is a perspective view showing a cutting step of the pipe member.

FIG. 10 is an explanatory view showing a deburring step of the cut pipe member.

FIG. 11 is a perspective view showing a state where pipe members bundled for cleaning are accommodated in a basket.

FIG. 12 is a side sectional view showing a state in which the pipe member is cleaned in the cleaning device.

FIG. 13 is a diagram illustrating the operation of the nozzle device.

FIG. 14 is an operation explanatory view following FIG. 13;

FIG. 15 is a plan view showing a modification of the gas guide passage.

FIG. 16 is a plan view showing another modified example.

FIG. 17 is a plan view showing an example in which the nozzle device is configured in a ring shape.

FIG. 18 is a diagram conceptually showing an example of the water treatment apparatus of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cleaning device 2 Cleaning tank 3 Aeration mechanism N Nozzle device 4 Hollow body 6 Compressed gas source 9 Injection hole 10 Bottom hole 11 Gas guide passage part 20 Water treatment device 21 Treatment tank

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B05B 1/00-1/36 B08B 3/10 C02F 3/20

Claims (7)

(57) [Claims] In a nozzle device of an aeration mechanism for injecting air bubbles into a liquid by aerating the air bubbles, compression of air or the like is performed in an inner space of a plate-shaped hollow body supported substantially horizontally in the liquid. As gas is introduced,
The plate-like hollow body, whereas with a number of injection holes for injecting the compressed gas to be introduced into the space on the upper side, the bottom
A nozzle device for an aeration mechanism , wherein a plurality of bottom holes larger than the respective injection holes are formed on the surface in a dispersed manner. 2. A bubble is injected into the liquid to aerate the liquid.
In the nozzle device of the aeration mechanism, the inner space of the hollow body
Compressed gas such as air is introduced into the
Has a large number of compressed gas injected into the space
While equipped with injection holes, the lower surface side than each of these injection holes
A large bottom hole is formed, and inside the hollow body
It is provided in a tubular shape so as to form a predetermined path in the space.
Guiding the compressed gas along the path,
A communication portion with the inner space portion is formed in the tubular wall portion,
The gas guided along the path is forwarded through the communicating portion.
It is characterized by including a gas guide passage for supplying into the space.
The nozzle device of the aeration mechanism. 3. The hollow body is supported substantially horizontally in a liquid.
The nozzle device according to claim 2, wherein the nozzle device is formed in a plate shape. Wherein said gas guiding passage is secured to at least one top inner surface or lower surface of the hollow body, according to claim 2 also is intended to serve as the reinforcing member for reinforcing the hollow body
Is the nozzle device according to 3 . Wherein said gas guiding passage with comprises a rectangular cross-section, the communication section to one of claims 2 to 4 are through holes formed at predetermined intervals on the side wall portion <br The nozzle device according to the above. 6. A cleaning tank containing a cleaning liquid and immersed in a member to which a powdery substance is adhered, and a cleaning tank provided in the cleaning liquid of the cleaning tank and having an inner space portion of a hollow body.
Compressed gas such as air is introduced into the
Numerous you inject compressed gas introduced into the space portion to
While equipped with injection holes, the lower surface side than each of these injection holes
A large bottom hole is formed, and air bubbles are
A member cleaning device, comprising: a nozzle device that injects and removes the attached matter; and a compressed gas source that supplies a compressed gas to the nozzle device. 7. A processing tank in which water to be treated is stored, and disposed in the water stored in the processing tank, and a gas such as air or oxygen is injected into the water to aerate the water. 1
A water treatment apparatus, comprising: the nozzle device according to any one of claims 1 to 5, and a compressed gas source that supplies a compressed gas to the nozzle device.