JPH10286542A - Pressure tank for washing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain air flush washing for which a standard pressure tank is used by a method wherein a simple mixing mechanism part which mixes air pressurized with a pressure tank in a washing liquid channel is additionally attached to a discharge opening of the washing liquid. SOLUTION: An air pressure adjuster, a ventilation valve 4, a suction up pipe 5 etc., are fitted onto a cover 2 of a pressure tank 1. A washing liquid channel is bored on a handle 6 fitted via a connection joint 4 from the suction up pipe 5, and a discharge joint 7 to which a small hole orifice is additively provided is fitted to a discharge opening of the handle 6. A T-shaped joint 8 is fitted to a tip of the discharge joint 7, compressed air is introduced from a compressed air introducing opening 8 with the T-shaped joint 8, mixed in washing liquid, and a gas liquid mixed current discharged from a three-way cock 9 fitted to a tip of a discharge opening 8b is connected to a channel to be washed via a hose or the like. The small hole orifice of the discharge joint 7 limits a flow rate of the washing liquid, and an orifice diameter wherein the most effective mixing ratio of washing liquid and air for washing efficiency is obtained, is set by selection.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure tank for cleaning which is used for cleaning a flow path of a coating material of a coating apparatus for applying a paint, an adhesive or the like.

[0002]

2. Description of the Related Art Coating devices for applying paints, adhesives, and the like are:
This is a device that performs a coating operation by supplying a coating material to a discharge tank such as a spray gun using a pressurized tank or a pump that feeds the coating material. Then, at the end of the coating operation or at the time of replacing the coating material such as color change, the coating device including the coating hose and the discharge head must be cleaned. In this cleaning, when cleaning is performed by flowing a cleaning liquid through the flow path of the coating material, simply flowing the cleaning liquid does not easily wash the highly viscous coating material adhered to the flow path wall, and requires a large amount of cleaning liquid. There is a problem.

[0003] In the cleaning of the coating material flow path, air flush cleaning is performed in which a coating liquid remaining in the coating material flow path is discharged and then mixed with a cleaning liquid and compressed air. This air flush cleaning has the effect of greatly improving the cleaning effect, greatly reducing the cleaning time, and greatly reducing the cleaning liquid, as compared with cleaning by simply flowing a cleaning liquid.

[0004] The pressurized tank for air flush cleaning is as follows.
It is manufactured as a cleaning-only container in which the suction pipe of the pressurized tank is processed. However, this washing-dedicated container is specially manufactured, and has a problem of high cost because the number of manufactured containers is small. Further, there is a disadvantage that the coating material pressurizing tank cannot be used as a cleaning pressurizing tank.

[0005]

SUMMARY OF THE INVENTION The present invention uses a pressurized tank which is normally used as a pressurized pressurizing tank for applying a coating material, and adds a simple gas-liquid mixing mechanism to the pressurized tank. By doing so, it is an object of the present invention to be able to use as a pressure tank for cleaning.

[0006]

According to the present invention, a cleaning liquid is stored in a pressurizing tank for supplying a coating material such as a paint to a discharge head such as a spray gun by pressurizing compressed air to form a cleaning pressurizing tank. When used, a small-hole orifice for restricting the supply amount of the cleaning liquid is provided in a flow path for supplying the cleaning liquid via a suction pipe hanging down from the pressurized tank lid, and air provided on the pressurized tank lid is provided. A pressurizing tank for cleaning which is used for cleaning as a gas-liquid mixed flow by mixing and mixing air in a pressurized tank adjusted and pressurized by a pressure regulator at a discharge port of the small hole orifice via a check valve. It is. The compressed air that supplies the pressurized air in the pressurized tank to the discharge port of the small hole orifice in the cleaning liquid flow path via the check valve branches off from the vent valve provided on the pressurized tank lid. This is a cleaning pressurized tank to be supplied.

In addition, a three-way cock is provided in a discharge port flow path of a gas-liquid mixed flow that has been joined and mixed at the small-hole orifice discharge port,
An air flow path of the same pressure as the original pressure air supplied to the air pressure regulator is connected to the three-way cock, and by operating the three-way cock, the original pressure air or the gas-liquid mixed flow can be appropriately switched to the flow path to be cleaned. When the coating material remains in the flow path to be cleaned, the remaining coating material is discharged in advance with the original pressure air, and then a switching operation such as flowing a gas-liquid mixed flow can be performed. This is a cleaning pressurized tank.

[0008]

A large number of pressurized tanks for supplying a coating material such as a paint to a discharge head such as a spray gun by pressurizing the tank according to the internal volume of the tank are standardly prepared. This pressurized tank has an air pressure regulator for adjusting pressurized air on the lid, a suction pipe that feeds the coating material under pressure, and a vent that removes pressurized air from the tank when the lid of the pressurized tank is removed. A valve, a safety valve, an open / close cock and the like are attached. It is common practice to put a cleaning thinner or the like into this pressurized tank and use it as a cleaning tank. However, as described in the conventional example, when the cleaning tank discharges only the cleaning liquid to clean the coating device, the flow path of the coating material is not easily cleaned, and a large amount of cleaning liquid is required. Pressure tank is required. If this is used as air flush cleaning, the capacity of the pressurized tank can be reduced, and the cleaning time can be greatly reduced.

The coating material pressurizing tank is disposed on a pressurizing tank lid in order to perform an air flush cleaning method in which compressed air and a cleaning liquid are mixed and flow into a coating material flow path of a coating device. Each device is used as it is, and air flush cleaning is enabled by providing a simple mixing mechanism component for mixing the air pressurized by the pressurized tank at the cleaning liquid discharge port into the cleaning liquid flow path.

In the case of performing air flush cleaning,
If the flow path to be cleaned of a coating device or the like is cleaned while the flow path is filled with the coating material, the cleaning effect of the air flash cleaning is reduced, and the coating material remaining in the flow path is wasted. Before washing the flow channel, it is desirable to discharge the coating material remaining in the flow channel and then perform air flush cleaning. And the coating material filling the channel to be cleaned is
Since there is a surface that requires time for complete discharge, the coating material is extruded in advance with high-pressure air that does not contain a cleaning liquid, and the flow path to be cleaned is made only of the material adhering to the inner wall such as a hose, and then the air is discharged. Perform flash cleaning. The switching is
The cleaning operation can be further enhanced by switching the main pressure air connected to the three-way cock and the gas-liquid mixed flow.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view in which a main part of a cleaning pressurizing tank of the present invention is sectioned, and FIG. 2 is a side view of FIG. FIGS. 3, 4, and 5 are enlarged cross-sectional views of portions A, B, and C shown in FIGS.

1 and 2, a lid 2 is hermetically screwed into a pressurized tank 1 having an internal volume of 2 l. An air pressure regulator 3 for pressurization, a vent valve 4, a suction pipe 5, and the like are mounted on the lid 2. A cleaning liquid channel is formed in a handle 6 attached from the suction pipe 5 via a connection joint 15, and a discharge joint 7 having a small hole orifice is attached to a discharge port of the handle 6. A T-shaped joint 8 is attached to the tip of the discharge joint 7, and compressed air is introduced from the compressed air inlet 8a through the T-shaped joint 8 and mixed with the cleaning liquid. The gas-liquid mixed flow mixed with the compressed air communicates with a three-way cock 9 attached via a nipple screwed to the discharge port 8b of the T-shaped joint.
The gas-liquid mixed flow discharged from the three-way cock 9 is connected to a flow path to be cleaned such as a coating device via a flexible hose or the like.

In the compressed air introduced into the T-shaped joint 8, the pressurized air in the pressurized tank 1 is branched by the vent valve 4 and introduced into the elbow 10 via the air tube 12. An air tube joint 11 is screwed into the elbow 10, a ball-shaped check valve 13 is mounted on the tube joint 11, opened by the pressure of pressurized air, and compressed air is sent to the T-shaped joint 8. .

The air pressure regulator 3 is connected to a joint 3a from an air source (not shown) via an air hose, and the air pressure is adjusted by turning an adjustment knob 3b.
The adjusted pressure is displayed on the pressure gauge 3c. Then, the adjusted pressure is introduced into the pressurized tank via a check valve 16 provided on the back side of the lid 2 to pressurize the cleaning liquid.
On the other hand, the joint 3 attached to the symmetric side of the joint 3a
d is a flow path from which unadjusted original pressure air is directly discharged,
When used as a pressure-feeding tank for the coating material, it is used to combine the spraying air hose and the coating material hose. In the present invention, the original compressed air is supplied to the three-way cock 9 via the air tube 14. It is connected and used for discharging coating material remaining in the flow path to be cleaned.

The original pressure air introduced into the three-way cock 9 is used to discharge the coating material or the residual cleaning liquid filling the coating material flow path of the coating device at the time of cleaning with high-pressure original pressure air. According to the direction of the operation handle 9a of the three-way cock, switching to the original pressure air, the air flush cleaning, and the closing of the flow path is performed. Therefore, high pressure air, air flush cleaning by a gas-liquid mixed flow, high pressure air during discharge of the cleaning liquid remaining in the flow path to be cleaned after cleaning, or in the middle of air flush cleaning, before discharging the residual coating material before cleaning. The cleaning operation is performed by a timely switching operation such as flowing the original pressure air instantaneously.

In the sectional view of FIG.
In the discharge joint 7 disposed at the discharge port, a tapered sheet 7b is air-tightly joined to a joint 7c with a cap nut 7d. The small hole orifice 7a is fitted in the flow path of the tapered sheet 7b. The small hole orifice 7a limits the flow rate of the cleaning liquid and does not limit the present invention, but several orifice diameters of 1 to 3 mm are prepared and can be appropriately selected. This is 1 per minute
The washing liquid of 100 to 200 ml is appropriately mixed with the compressed air, and the mixing ratio of the washing liquid and the air at which the washing effect is the highest, corresponding to the viscosity and the like of the coating material adhering to the passage to be washed. The orifice diameter is selected and set. This is because it is difficult to adjust to obtain the mixing ratio that minimizes the cleaning liquid by adjusting with a valve, etc., the handling becomes complicated, and using a valve with a scale or the like increases the cost. The hole orifice ensures that an appropriate value with the highest cleaning effect can be obtained at low cost.

In the vent valve mechanism shown in FIG.
a is screwed to the lid 2 and communicates with the inside of the pressurized tank 1.
Flow path 4d communicating with the inside of the pressurized tank 1 of the vent valve body 4a
Is branched in the middle of the flow path and the mixed air joint 4c
To the flow path of the degassing valve knob 4b. The air in the pressurized tank 1 flows to the mixing air joint 4c and is mixed in the T-shaped joint 8 described above. This gas-liquid mixture
Since the tank pressurized air is supplied, the cleaning liquid pumping pressure and the mixed air pressure are the same, and proper mixing is performed without interfering with each other. When the lid 2 is removed, the pressurized air in the tank is evacuated by turning the evacuating knob 4b so that the valve is opened and evacuated, and the inside of the tank becomes atmospheric pressure, and the lid 2 can be removed. .

In the check valve mechanism shown in FIG. 5, a check valve 13 made of a resin ball is mounted on the air tube joint 11. When the air in the pressurized tank 1 is evacuated, the check valve 13 causes the cleaning liquid remaining in the mixing channel formed on the lid 2 such as the T-shaped joint 8 to flow backward through the evacuated hole and to be ejected. It is provided to prevent this.

[0019]

As described above, according to the present invention, a gas-liquid mixing mechanism is added on the lid of a pressurized tank for coating material which is manufactured as a standard to perform air flash cleaning. Since the material pressurizing tank can be used as the cleaning pressurizing tank, an effect of being a low-cost cleaning pressurizing tank can be obtained.

Further, by providing the gas-liquid mixing mechanism set to the coating material pressurizing tank possessed by the customer, a cleaning pressurizing tank capable of easily performing air flush cleaning at low cost can be obtained. There is no need to stock a dedicated cleaning pressurized tank on the side.

Further, a three-way cock is attached to the gas-liquid mixed flow discharge port, and original pressure air is connected to the three-way cock to discharge the liquid remaining in the flow path to be cleaned by high-pressure air and to use the gas-liquid mixed flow. Since the air flush cleaning can be appropriately switched, the cleaning effect is further improved, the cleaning time is significantly reduced, and the cleaning liquid can be significantly saved.

[Brief description of the drawings]

FIG. 1 is a sectional front view of a main part of a pressure tank for cleaning of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is an enlarged cross-sectional view of a part shown in FIG. 1A.

FIG. 4 is an enlarged sectional view of a portion shown in FIG. 1B.

FIG. 5 is an enlarged cross-sectional view of a part shown in FIG. 2C.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pressurized tank 2 Lid 3 Air pressure regulator 4 Air release valve 5 Suction pipe 7 Discharge joint 7a Small hole orifice 8 T-type joint 9 Three-way cock 13 Check valve 14 Source pressure air tube

Claims (3)

[Claims] 1. A pressurizing tank for storing a cleaning liquid in a pressurizing tank for supplying a coating material such as a paint to a discharge head such as a spray gun by pressurizing compressed air and using the cleaning liquid as a cleaning pressurizing tank. Through a suction pipe hanging down from the lid, a flow path for supplying the cleaning liquid is provided with a small hole orifice for limiting the supply amount of the cleaning liquid, and is adjusted and pressurized by an air pressure regulator attached to the pressurized tank lid. Air in the pressurized tank
A pressurizing tank for cleaning, which is mixed at a discharge port of the small hole orifice via a check valve and used for cleaning as a gas-liquid mixed flow. 2. Compressed air which supplies pressurized air in a pressurized tank to a discharge port of a small hole orifice of a cleaning liquid flow passage via a check valve is supplied from a vent valve provided on a pressurized tank lid. The pressurizing tank for cleaning according to claim 1, wherein the tank is supplied in a branched manner. 3. A three-way cock is disposed in a discharge port flow path of a gas-liquid mixed flow that has been mixed and mixed at a small-hole orifice discharge port, and the three-way cock has the same pressure as original pressure air supplied to an air pressure regulator. The pressurizing tank for cleaning according to claim 1, wherein the air flow path is connected, and by operating the three-way cock, the original pressure air or the gas-liquid mixed flow can be appropriately switchably supplied to the flow path to be cleaned.