KR100243558B1 - Painting equipment of aqueous zinc paint - Google Patents

Abstract

The present invention relates to a coating apparatus used for coating a water-based paint containing a high proportion of zinc, comprising a movable stand (3) on which a paint can (17) containing a mixed paint is placed; A pneumatic cylinder (5) installed vertically to the stand (3) and provided with a cylinder tube (27) movable up and down with respect to a fixed piston rod (25); A paint can lid 7 fixed to the cylinder tube 27 and vertically moved together with the cylinder tube 27 to cover the paint can 17 and to be held on the stand 3; An agitator 9 provided on the paint can lid 7 to agitate the paint of the paint can 17; A paint pressure feed pump (11) for feeding the paint of the paint can (17) by pressure; A spray gun 13 connected to the paint feed pump 11 through a paint discharge hose 59; Pressure air from the compressor 81 to store the high-pressure air in the air pressure cylinder 5, the paint-feed pump 11 and the spey gun 13, and the high-pressure air And an air tank (15) for supplying the coating liquid to the paint tank, and an air tank (15) for supplying the coating liquid to the paint tank. There is an effect of providing a compact painting apparatus which can perform painting work with high work productivity and which improves the mobility and usability of the painting apparatus according to the painting work.

Description

Water-soluble zinc paint coating system

[TECHNICAL FIELD]

The present invention relates to a coating apparatus used for coating a water-soluble paint containing a high proportion of zinc. More particularly, the present invention relates to a water-soluble paint containing a high proportion of zinc having a strong iron affinity, And more particularly to a compact coating apparatus for use in a coating apparatus.

BACKGROUND ART [0002]

Various rustproofing furnaces are used for coating steel structures that make up bridges. However, due to the difficulty of repairing the paints which should be done frequently after the construction of bridges, recently, a new rust prevention Paints have been developed and used radically. This new anticorrosive coating is characterized in that it is chemically reacted with the iron component of the steel structure to be painted as a water-soluble paint containing a high proportion of zinc as a main component such as water-soluble high proportion of zinc silicate paint to form a reduction protective film, And the use of water as a solvent is expanding its use.

However, since the paint has a property that the paint is adhered to the iron part due to high affinity to iron, the conventional paint apparatus has a problem in that it can not be used or can not be used for painting the paint. Therefore, it is general to use a coating apparatus which is separately manufactured in accordance with the characteristics of the coating material.

As an example of a conventional coating apparatus used for coating a water-soluble paint containing a high proportion of zinc, there is a compressed air pressure type coating apparatus as shown in Fig. As shown in the drawing, the conventional compressed air pressurizing type coating apparatus includes a tank 171 provided with a lid 173 capable of opening and closing with air by a gasket 175, A stirrer for stirring the paint during the painting operation by a paddle 181 attached to an air supply line 177 and a shaft 179 rotated by a motor (not shown), and a paint in a compressed tank And a paint discharge pipe 183 to which a discharge hose for spray painting is connected to a spray gun. In FIG. 2, reference numeral 185 denotes a nipple for replenishing the paint to the tank 171, and is provided with a lid 187 that can be hermetically opened and closed by a gasket. Reference numeral 189 denotes a clamp which hermetically holds the lid 173 in the tank 171.

The conventional compressed air pressure type coating apparatus having the above configuration adopts a system in which constant air pressure is introduced into the tank and the paint in the tank is pushed through the discharge pipe 183 by the internal pressure of the tank. And has several problems. That is, when the paint is replenished through the nipple 185, the painting operation is stopped, the compressed air in the tank is discharged, the paint is replenished, and the paint is supplied to the tank after a certain level of air pressure is supplied none. Therefore, when the paint is replenished, the work must be stopped for a considerable period of time, resulting in a problem that the continuous painting operation can not be performed and the working efficiency is lowered. Further, since the conventional coating apparatus discharges the coating material by the pressure of the tank in which a certain amount of air is injected, there is a difference depending on the capacity of the tank. However, when the length of the discharge hose is 25 m or more, There is a problem in that the quality of coating is deteriorated or the coating material can not be discharged depending on the case, which makes the coating impossible.

In this regard, the present inventor has proposed a "coating system" of Patent Application No. 96-12830 (filed on April 25, 1996) in order to solve all the problems of the conventional coating apparatus. The "paint system" includes an open paint tank equipped with a stirrer, a paint feed pump with a paint pressure gauge and an air pressure gauge, which pressurizes the paint of the paint tank, high pressure air from a compressor, A high-rate zinc-containing water-soluble paint comprising an air tank for supplying high-pressure air to the paint tank, a paint transfer device for transferring the paint to the paint tank, and a paint discharge hose and spray gun connected to the paint pressure transfer pump It is necessary to stop the coating operation for a long period of time at the time of replenishing the paint while preventing the water-soluble paint containing a high proportion of zinc having a strong iron affinity from sticking to the coating apparatus The length of the paint discharge hose can be freely used up to 25m or more, The paint can be discharged at a constant pressure, so that the painting operation is easy and the painting is uniformly performed. The present invention further improves the mobility and usability by further miniaturizing and simplifying the coating apparatus disclosed in the above-mentioned Japanese Patent Application No. 96-12830.

Accordingly, it is an object of the present invention to solve the problems of the above-described conventional compressed air pressure painting apparatus used for coating a water-soluble paint containing a high proportion of zinc, there is no need to stop the painting operation at the time of replenishing the paint, The present invention provides a compact coating apparatus capable of freely selecting the length of the paint discharge hose and performing painting work with high work productivity.

An object of the present invention is to provide a coating apparatus used for coating a water-soluble paint containing a high proportion of zinc, wherein a paint stored in an open paint can provided with a stirrer is supplied by a high pressure air in the air tank And to provide a compact coating apparatus which performs coating by a method of discharging a paint of a paint pressure feeding pump.

It is also an object of the present invention to provide a compact coating apparatus which reduces or concentrates the components of the coating apparatus to simplify or miniaturize the apparatus, thereby improving the mobility and usability of the coating apparatus due to the coating operation.

FIG. 1 is a perspective view showing an example of a coating apparatus of the present invention. FIG.

FIG. 2 is a longitudinal cross-sectional view of a compressed air pressure painting apparatus as an example of a conventional water-soluble zinc paint coating apparatus.

Description of the Related Art

1: Painting device 3: Stand

5: pneumatic cylinder 7: paint can cover

9: Stirrer 11: Paint pressure pump

13: spray gun 15: air tank

17: paint tank 25: piston rod

27: cylinder tube 45: motor (air pressure)

The above object of the present invention can be achieved by providing a portable stand on which a paint can containing a mixed paint is placed; A pneumatic cylinder installed in a vertical direction on the stand and provided with a cylinder tube movable up and down with respect to a fixed piston rod; A paint can cover which is fixed to the cylinder tube and moves up and down together with the cylinder tube to cover the paint can and hold it on the stand; An agitator provided on the paint can lid and stirring the paint of the paint can; A paint pressure feeding pump for feeding the paint of the paint can; A spray gun connected to the paint feed pump through a paint discharge hose; And an air tank installed adjacent to the cylinder for storing high pressure air from the compressor to supply high pressure air to the pneumatic cylinder, the paint pressure transfer pump, the spray gun, and optionally the agitator. Is achieved by a coating apparatus of a water-soluble paint containing a high proportion of zinc.

The coating film of the present invention is used for coating a water-soluble coating material containing a high proportion of zinc having a strong iron affinity to a steel structure such as a bridge, and discharges the coating material by applying air pressure to the air- The paint stored in the opened paint tank (paint can) is pumped by the paint pressure feeding pump, the high pressure air supplied from another air tank is supplied to the paint pumped to the paint pressure feeding pump, and the paint supply amount and the air pressure This is a coating device that discharges the paint through the spray gun while adjusting the size of the cylinder. By installing the main components of this device in the cylinder tube of the pneumatic cylinder vertically installed in the paint can stand, it is possible to miniaturize and simplify the device to improve mobility and usability . Here, the fact that the paint can is opened does not mean that the paint can is structurally opened, but means that the inside of the paint can is not kept airtight to the outside atmosphere.

Hereinafter, the coating apparatus of the present invention will be described in detail with reference to the accompanying drawings. The following concrete examples illustrate the coating apparatus of the present invention by way of example only and do not limit the scope of the present invention.

1 is a perspective view showing an example of a coating apparatus of the present invention.

1, the painting apparatus 1 of the present invention includes an air pressure cylinder 5, a paint can lid 7, a paint stirrer 9, a paint feed pump 11, The spray gun 13, and the high-pressure air tank 15 are mounted around the pneumatic cylinder 5 as shown in Fig.

The stand 3 supporting the constituent elements of the painting apparatus 1 of the present invention has a pneumatic cylinder 5 installed vertically on one side thereof and a paint can 17 of 5 gallons, And is formed into a cart shape having a transportation wheel 19, a handle 21, and a pedestal 23. In the stand 3, a paint can 17 is placed as described later.

A pneumatic cylinder (5) is installed on one side of the stand (3) in a vertical direction. The pneumatic cylinder 5 vertically feeds a paint can lid 7 and a stirrer 9 to be described later and is provided with a paint can lid 7 and a stirrer 9 and optionally a paint pressure feed pump 11, And also serves as a support base on which the base 15 is mounted. The pneumatic cylinder 5 is installed in a vertical direction so that the piston rod 25 is fixed to the stand 3 and the cylinder tube 27 can move up and down with respect to the piston rod 25. As the pneumatic cylinder 5, a single-acting cylinder may be used, but it is preferable to use a single-rod double-acting cylinder using air pressure for both the upward and downward reciprocating motions, as shown in Fig. In order to prevent the cylinder tube 27 from rotating about the piston rod 25, the guide bar 29 is vertically fixed on the stand 3 in the vicinity of the cylinder 5, 27) is slidably fixed to the guide bar 29. [0053] The upward and downward movement of the cylinder tube 27 is performed by high-pressure air from the air tank 15 described later. The air pressure cylinder 5 selectively supplies high pressure air supplied through the air hose from the air tank 15 to the upper and lower portions of the cylinder tube 27 to adjust the moving direction of the cylinder tube 27 up and down. (31). 1, reference numeral 33 denotes an air hose for transferring air from the air tank 15 to the regulating valve 31 of the pneumatic cylinder 5. Reference numeral 35 denotes an air hose for transferring air to both sides of the double acting cylinder . Reference numeral 37 denotes a ring for slidably fixing the cylinder tube 27 to the guide bar 29.

A paint can lid 7 is attached to the center of the cylinder tube 27 toward the side where the paint can 17 is placed. The paint can lid 7 is vertically moved together with the upward and downward movement of the cylinder tube 27 so that the paint can 17 is fixed to the stand 3 so as not to move and the paint can 17 is covered. That is, when the cylinder canal 27 is moved downward with the paint can 17 mounted on the stand 3, the lid 7 covers the upper part of the paint can, So that the paint can is prevented from being detached from the stand 3. The paint can lid 7 and the cylinder tube 27 may be fixedly joined, for example, by welding, or may be detachably coupled by bolts. The paint can lid 7 is provided with a suction pipe insertion hole 39 through which the paint suction pipe 57 of the paint pressure feed pump 11 described later passes and a paint injection port 41 through which the paint is supplied to the paint can 17 . A suction pipe guide pipe 43 for allowing the suction pipe 57 to be held at the bottom of the paint can without being flowed is provided in the lower portion of the suction pipe insertion hole 39 of the lid 7, When the paint can 17 is covered with the paint can 17, it extends to a position close to the bottom of the paint can.

An agitator 9 for agitating the paint of the paint can 17 is provided in a substantially central portion of the paint can lid 7 so as to penetrate through the paint can lid 7. A water-soluble paint containing a high proportion of zinc having a strong iron affinity is characterized in that once it is mixed with water, it must be stirred until the coating is finished. Therefore, the coating apparatus of the present invention is provided with the motor 45, the rotating shaft 47 rotated by the motor 45, the impeller 49 attached to the rotating shaft 47 to stir the paint, And the impeller 49 having the hole 53 formed therein is rotated during the painting operation to supply air to the painting material continuously while the impeller 49 is rotated The paint is agitated. The motor 45 used in the agitator 9 is preferably an air-pressure motor in that high-pressure air of the air tank 15 described later can be used as a power source, but the use of an electric motor or a hydraulic motor is also excluded No. Reference numerals 55 and 56 denote hoses for supplying air to the air pressure motor 45 from the air tank 15 and impeller control valves for controlling the rotational speed and speed of the impeller by regulating the amount of air to the air pressure motor.

At a substantially upper end portion of the cylinder tube 27, a paint feed pump 11 such as a diaphragm pump is provided. The paint feed pump 11 includes a paint suction pipe 57 which extends to the bottom of the paint can 17 and draws paint thereinto, a paint discharge port 61 to which the paint discharge hose 59 is connected and which can control the paint discharge amount, And a paint drain hose (63) provided with a valve (65) for discharging the paint in the pressure feeding pump (11) to the paint can (17). The hose 67 for supplying high pressure air from the air tank 15 is connected to the air tank 15 and is provided with a control valve 69 for controlling the pressure of the supplied air, A paint discharge pressure gauge 71 indicating the air pressure supplied to the pressure feeding pump is provided on the upstream side of the pressure feeding pump 11. The high pressure air supplied to the pressure feeding pump 11 is branched by the branching mechanism 73 between the regulating valve 69 and the discharge pressure gauge 71 so that the air through the branching mechanism 73 is supplied to the pressure feeding pump 11 ) To the paint suction pipe (57). Therefore, the paint that has flown from the paint can 17 to the pressure feeding pump 11 along the paint suction pipe 57 by the negative pressure of the pressure feeding pump is ejected to the paint ejection opening 61 by the high-pressure air and is conveyed.

1 shows an example in which the paint pressure feeding pump 11 is fixed to the upper end of the cylinder tube 27 of the pneumatic cylinder 5 but it is also possible to fix it to the air tank 15.

The spray gun 13 is connected to the paint discharge port 61 of the paint feed pump 11 through a paint discharge hose 57. The spray gun 13 is used for water-soluble paint coating having a connecting portion 75 of the paint discharge hose 57 and a connecting portion 79 of a high-pressure air pipe 77 described later (see Patent Application No. 96-12829).

A high-pressure air tank 15 for storing the air from the compressor 81 is provided on the side of the cylinder tube 27 of the pneumatic cylinder 5. The air tank 15 generates the vertical movement force of the cylinder 5, the paint discharge pressure of the paint pressure pump 11, the rotational force of the air pressure motor 45 of the agitator, and the paint spraying force of the spray gun 13 Pressure air from a common air compressor 81 installed separately from the present apparatus 1. The high- The air tank 15 is provided with a nipple 85 to which an air supply hose 83 for receiving air from a compressor 81 is connected and a pneumatic cylinder 5, an air pressure motor 45, And a plurality of nipples 87 to which hoses (35, 56, 67, 77, etc.) for supplying air to the spray gun 13 are connected. The nipple 85 used to connect the air supply hose 83 to the common compressor 81 among the nipples desirably uses the one-touch nipple since the air supply hose is frequently detached. The attachment of the air filter 89 to the nipple 87 to which the high-pressure air pipe 77 for supplying the high-pressure air to the spray gun 13 is connected is required to filter the impurities contained in the high- Can be prevented from clogging. In this embodiment, the air tank 15 is fixedly attached to the cylinder tube 27 and moves up and down together with the cylinder tube 27. However, it is also possible to directly mount the air tank 15 on the stand 3 so as not to be fixed to the cylinder tube 27. In this case, the relative movement distance between the air tank 15 and the cylinder tube 27 The air hoses 33, 56 and 67 connected between the air tank 15 and the cylinder 5, the air pressure motor 45 and the paint pressure feeding pump 11 must be longer. Reference numeral 91 denotes an air pressure gauge indicating the air pressure of the air tank 15.

The air tank 15 is provided with a nipple 87 to which the apparatus cleaning air gun 93 is connected so that the apparatus can be cleaned by the air pressure of the apparatus itself. It is possible to eliminate the inconvenience of replacing the hose for different purposes with one nipple.

In FIG. 1, the nipples 85 and 87 to which the air hose is connected are shown at the center in the air tank 15. However, this is merely intended to make the existence of these nipples visible in the drawings. Actually, Depending on the course of the hose connected to the nipple, it may be formed at an appropriate position in the air tank.

Hereinafter, the process of performing the painting operation by the painting apparatus of the present invention will be described. First, the air supply hose 83 from the compressor is connected to the air supply nipple 85 of the air tank 15 and air is supplied to the air tank 15. Next, the paint can lid 7 is raised to the top by the cylinder adjusting valve 31 and then the paint can 17 containing the mixed paint is placed on the stand 3 and then the cylinder adjusting valve 31 is operated So that the paint can 17 is pressed and covered with the paint can lid 7. When the paint can 17 is attached, the impeller adjusting valve 55 is opened to rotate the stirrer 9 at a proper speed, and the control valve of the paint pressure feed pump 11 is opened to open the paint discharge pressure gauge 71 To adjust the appropriate paint discharge pressure. Then, the paint spraying hose 59 and the high-pressure air pipe 77 are connected to the spray gun 13 to perform painting work. In the continuous coating operation, the coating material is supplied through the coating material injection port 41 formed in the coating material can 17.

Effects of the coating apparatus of the present invention will be described in detail as follows. First, since the paint can is open, it is not necessary to stop the painting work for a long time when the paint is replenished. Second, since a wide range of air pressure can be provided by the air tank, the length of the paint discharge hose can be freely set to 25 m or more. Third, a certain amount of paint can be discharged at a constant pressure by the air pressure gauge and the paint discharge pressure gauge, so that the painting work is easy and the painting is uniform. Fourthly, the entire constituent elements constituting the painting apparatus are installed intensively and compactly around the pneumatic cylinder on the small stand with the wheels mounted thereon, so that the mobility and applicability of the painting apparatus according to the painting operation is excellent. Fifth, due to the above-mentioned various effects, painting work by one person is possible.

Claims (4)

A movable stand (3) on which a paint can (17) containing a mixed paint is placed; A pneumatic cylinder (5) installed vertically to the stand (3) and provided with a cylinder tube (27) movable up and down with respect to a fixed piston rod (25); A paint can lid 7 fixed to the cylinder tube 27 and moved up and down together with the cylinder tube 27 to cover and hold the paint can 17 on the stand 3; An agitator 9 provided on the paint can lid 7 to agitate the paint of the paint can 17; A paint pressure feed pump (11) for feeding the paint of the paint can (17) by pressure; A spray gun 13 connected to the paint feed pump 11 through a paint discharge hose 59; Pressure air from the compressor 81 to store the high-pressure air from the pneumatic cylinder 5, the paint-feed pump 11, the spray gun 13, and optionally the agitator (not shown) 9. An apparatus for coating a water-soluble paint containing a high proportion of zinc, comprising an air tank (15) for supplying high-pressure air to the nozzle (9). 2. The coating apparatus according to claim 1, wherein the air tank (15) is fixedly attached to the pneumatic cylinder (5). The coating apparatus according to claim 1 or 2, wherein the paint pressure feed pump (11) is fixedly attached to the pneumatic cylinder (5). The paint can lid according to claim 1 or 2, wherein the agitator (9) is fixed to the center of the paint can lid (7) and includes a motor (45), a rotating shaft (47) An impeller 49 attached to the motor 47 for stirring the paint and a speed reducer 51 for maintaining the rotation speed of the rotary shaft 47 at an appropriate low speed. Is an air pressure motor that is rotated by air of the air pump.