JP2000354793A - Device for applying liquid material on surface and use of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a strippable coating having higher tear resistance than the adhesive power to a surface on the surface of an objective material by providing an applicator device connected to a container, a heating device for keeping a material in the liquid state in the container and a pressure generating device for transporting the liquid material. SOLUTION: A material such as a granular material or a pellet is filled in a solid state in a container 1 and heated to change the solid to liquid. A pressure generating device 2 is constituted of an electronic reversible piston pump and transports the liquefied material in the container 1 without pulsation. The transporting line 3 of the material is constituted of a heat resistant hose, which connects the container 1 to an applicator device (or coating utensil) 4. In this case, the applicator device 4 is designed as a manual spray gun (or spray coater). The spray gun has an exchangeable spray nozzle device 5. The heating device is preferably an electric heating device and more preferably controllable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an apparatus for applying a liquid substance to a surface. The invention also relates to the use of the device.

[0002]

2. Description of the Prior Art Apparatus of this type is used for applying (or applying) liquid and, if desired, pasty substances. Such substances can be solvents and detergents, which remain on the surface for only a short time, remain liquid and are generally flushed or washed off the surface. Such materials can also be paints, lacquers or adhesives, and it is clearly intended that they adhere to the surface. Such a substance may be a substance which forms a coating on the surface (or a coating, a mantle, a covering or a casing), which itself is solid and adheres (or sticks) to the surface. It is not or only slightly adhered. In the present specification, a paste-like substance is also included in the term "a substance in a liquid state (or a liquid state)". As mentioned above,
Detergents and solvents remain on the surface only temporarily, and therefore generally remain liquid at the surface, whereas paints, lacquers and adhesives, as well as the materials used to form the coating, To a solid state. Such applied materials are in a solid state at normal ambient temperature (or room temperature) of the surface to be coated with them. During the process of applying it to a surface, it is dissolved and / or
Or heated. It re-solidifies on the surface due to evaporation and / or cooling of the solvent. Liquefaction by supplying heat is more environmentally and generally economically advantageous because no solvent is required. However, the temperature of the liquefied material needs to be maintained at a sufficiently high temperature, not only in each storage container, but by applying heat until they are applied. The application of the substance is preferably carried out by spraying using a nozzle arrangement (or a nozzle arrangement or an array of nozzles).

Various devices are known as devices that can be used for the above-mentioned purpose. But,
All known devices have several disadvantages. These disadvantages are, in particular, inadequate control of the heating and pressure generating devices, the potential for contamination of the substance, or, respectively, the lack of a filter for the substance to be applied, Processing of recycled materials is optional, insufficient mixing of liquid and solid materials in containers, or
Each lacks a suitable mixing device, irregular distribution of the substance in the liquid state, or has pulsations (or fluctuations), respectively, and the shape of the spray nozzle is well adapted to the surface supplying the substance. Lack of safety, lack of protective housing for the parts of the device (which is essential for the functioning of the device), inadequate handling of the distribution device The overall ergonomic disadvantages of the range and the design of the device, which impede the efficient operation of the device, and to transporting the device quickly and without danger.

[0004]

The object of the present invention is therefore to propose an improved device of this kind which avoids the disadvantages of the prior devices; and proposes a new use of the device of the invention. That is.

[0005]

This object is achieved, according to the invention with respect to the device, by the characteristics of the characteristic part of claim 1; and according to the invention with respect to use.
Alternatively, this is achieved by the characteristics of the characteristic parts of claim 16. Further advantageous developments are defined in the dependent claims 2-14. Details and advantages of the present invention will become apparent from the following description of exemplary embodiments thereof, taken in conjunction with the drawings.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS.
0) shows a first mode. The device (100) includes a container (1) for a substance. The substance is introduced in a solid state,
Change to liquid state by heating device. A fine mesh filter is provided (or integrated) to remove impurity particles or, optionally, unmelted solids. An electronic reversible piston pump constitutes the pressure generator (2) and is used to transport the liquefied material in the container (1) without pulsation, so that the material is homogeneous. Application (or application) can be performed. The heatable hose constitutes the substance transport line (3) and the container (1)
To the applicator device (or applicator) (4). In this case, the applicator device (4) is designed as a manual spray gun (or spray coater).
Spray gun is replaceable spray nozzle device (5)
have.

Here, the reversible piston pump constituting the pressure generating device may include a plurality (for example, two) of piston pumps that do not operate simultaneously. Therefore,
When there are two pistons, the piston of one piston pump is pushing the substance to be applied (or applied) into the transport line (3), while the piston of the other piston pump is retracting and transporting the substance. Not extruded. In another aspect, the reversible piston pump may be such that one piston pushes material into the transport line during both movements of its operation.

[0008] The device further comprises an electric main distributor (6).
, Preferably with fuses for the heating device and the compressor and a safety switch. A main switch (7) is further provided. Main switch (7)
Is designed so that it can be locked as a safety device against unauthorized use of the device. The device (100) is easily transported. That is because the device includes a truck (or carrier or trolley) (102).
The various components of the truck (102) are arranged in a space-saving but easily accessible manner in the housing. The truck (102) has a movable towbar (8) and two flexible rollers (or deflection rollers) and two movable rollers (9) with a parking brake, thereby ensuring good operability of the truck. Is done. Air supply unit with two regulating units (10)
Is used to create various pressures to apply or spray the substance, respectively. In addition, the device (10
0) is the above-mentioned electrically driven compressor (1
Including 1). A hose carrier (12) is arranged in the housing of the truck to accommodate the hose-shaped transport line (3). The interior of the housing is used to install the tool cabinet. In addition, a cable carrier (1
3) is placed inside the housing of the truck (102) together with the power cable. A round hole (14) is attached to the cover plate of the housing. The round holes (14) allow the device (100) to be transported suspended, for example, by a crane or helicopter. The side walls of the truck (102) are essentially hinged with one or more opening covers (1).
5). It can be pushed in or detached from each other. These hinged opening covers (15) are used as protection, especially when transporting the device (100).

The above-described device (100) shown in FIGS.
Is mainly used to completely coat medium sized or large surfaces. For this purpose, the substances to be sprayed are, for example, granules, pellets,
Alternatively, a transport line that is filled in a container in a solid state, such as a portion of recycled coating optionally removed from a surface, brought into a liquid state by heating, and heated under pressure Via (3) they are sent to an applicator device (4) or a spray gun, respectively. The coating thickness of the applied substance can be influenced by the speed at which the spray gun moves along the surface to which the substance is supplied, in addition to the steps already described. The determination of this speed, as well as the position of the spray gun relative to the surface to be sprayed, is left to the user of the device described above. However, if the same type of surface is repeatedly sprayed with the same type of material with the same coating thickness, an arrangement of the spray nozzle that is complementary to the shape of the surface can be provided, and the arrangement of the spray nozzle is appropriately movable It can be attached to a holder, which moves at a speed which can be predetermined along the surface from which it is sprayed. To coat the pipeline, appropriately adapted equipment can be guided on rails along the pipeline. It is even more advantageous to use the pipeline itself as a rail.

Apparatus (100) shown in FIGS. 5 and 6
Differs from the above-described device in that it is totally protected from explosion, which is achieved by the steps listed below.

The first step involves the track (102).
As shown in FIG. 5, the truck (102) is provided with an internal gas detector (40), or the truck (102) can be connected to at least a nearby external gas detector (not shown). When the gas detector (40) detects an undesirable gas (eg, explosive gas) near the truck (102), or when the gas concentration detected by the gas detector (40) exceeds a predetermined value, the device (100) is the main switch arrangement (or main switch device) (4
The emergency switch (42), which is part of 4), automatically switches off (or shuts down),
The truck will be completely de-energized, with the exception of the main line connected to the electricity supply network (power supply net) in some cases.

The apparatus may also detect a large amount of gas, eg, a dangerous gas (eg, an explosive gas), in excess of a predetermined amount in a short time, or a small amount or a predetermined amount of such gas for a long time. The operation is automatically stopped when the amount is detected that does not reach the value.

The second step involves a hose-shaped transport line (3) shown on the left side of FIG. This transport line (3) has an outer jacket (or jacket) (3.1). Disposed within the outer jacket (3.1) is the inner jacket (3.2), which is adjacent to the actual line for transporting the substance (3.3). Outer jacket (3.
The space (3.4) formed between 1) and the inner jacket (3.2) has an excess pressure (eg 3 bar)
Hangs. Furthermore, a gun pressure line (or spray gun pressure line) extends via this space (3.4) and the applicator device (4)
Are supplied with compressed air or compressed gas, respectively, at a pressure of, for example, 6 bar. The pressure in the space (3.4) is monitored by a pressure sensor. The device (100) is switched off when the pressure in the space (3.4) exceeds a predetermined value. That is when a leak is occurring in the lumen pressure line.
The device (100) is also switched off when the pressure in the space (3.4) drops below a predetermined value. This is the case if the outer jacket (3.1), or one of its connectors with the container (1), or the applicator device (4) is leaking.

The third step relates to an applicator device (4) which is specifically a spray gun. It is shown on the right side of FIG. All empty spaces not used to carry the material to be applied, compressed air or compressed gas, respectively, are filled with a suitable plastics material (4.1). This protects against explosions, improves machine retention,
Improve the seal between the transport line (3) and the applicator device (4).

FIGS. 7A-7C show a 3 coated material.
Fig. 3 shows two differently shaped surfaces, as well as respective nozzle arrangements, the nozzle arrangements being essentially designed to be complementary to the corresponding surfaces. FIG. 7A relates to the outer coating of a pipe (20) by means of a spray gun (4) with an annularly arranged nozzle (21) directed radially inward. FIG. 7B shows a nozzle (23) arranged annularly and pointing radially outwards
The inner coating of the pipe (22) by means of a spray gun (4) equipped with FIG. 7C then relates to the coating of a plane (24) by means of a spray gun (4) with linearly arranged nozzles (25). In general, the nozzles (21, 23, 25) are arranged so as to act not only in the main direction of the aforementioned nozzles, but also in the direction of movement of the spray gun (4) (indicated by the arrow A in the figure). .

Finally, FIG. 8 shows, in a simplified schematic diagram, an arrangement for applying a substance to a surface (26) (eg, the hull of a ship) that is immersed in a liquid (28). To make this possible, the area of the surface to be sprayed in each case is covered with a bell (30). The bell (30) can be evacuated by an exhaust line and the bell (3
Within 0) is located the substance transport line (3) and the end of the spray nozzle arrangement. In this way, for example, a protective coating can be applied to the hull below the water surface, without having to move the ship to the dry dock. Similarly, surface protection can be provided in areas of the wall below the water surface (eg, walls made of concrete).

The device of the present invention can be used for many different purposes. In particular, they are very suitable for use on crude oil drilling platforms, i.e. for applying substances in the form of coatings to pipelines and pipeline connectors. Most pipeline connections are
Specifically, it is a form of a flange integrally fastened with bolts. Thus, if they do not have any surface protection, they generally corrode severely, especially by dissimilar metal corrosion, due to salty moist environments and seawater droplets. As already mentioned, the application (or application) of a coating of a suitable substance is provided as a surface protection. Surface protection in the form of a coating forms itself a body (or body), the tear resistance (or tear resistance or tear strength) of the body is greater than the adhesion to the surface, and is greater than the surface protection in the form of a lacquer. It is particularly pointed out here that it is more advantageous. Surface protection in the form of a lacquer forms a direct bond with the surface, which can only be removed by chemical solvents or abrasive mechanical treatment. In contrast to the removal of such complex lacquers, surface protection in the form of a coating can be pulled or peeled off, removing the whole or a large part from the surface to be protected. It is important that the surface protection can be removed without problems. Because it may need to be replaced after the end of its useful life, it may be partially damaged, or the pipeline and its connectors may be replaced, thereby affecting surface protection and damaging Because it may be It is most advantageous to make the coating with a material that can be recycled, so that the solid material of the peeled coating can be liquefied again in a device such as the device (100) and used. For this, the substance must be resistant to aging, in the sense that it can be brought into the liquid and solid state repeatedly and alternately. In this way, no additional material is needed for sections of the newly made coating and there is no waste in the form of removed old coating components that are no longer usable and must be disposed of. A further advantage of surface protection, which is in the form of a coating, rather than a tightly adherent protective layer, is that the coating is elastic, thereby offsetting any thermally or mechanically induced surface deformation (or Absorption).

As noted above, the apparatus of the present invention is particularly suited for use on a crude drilling platform. They can also be used in different ways than those described above.
By means of the device, for example, a coating or protective layer that does not or only slightly adheres to the surface to be protected can be formed on places other than the crude drilling platform, for example on utility poles, buildings or vehicles. Furthermore, if desired, the surface protection on the crude drilling platform can be formed in the form of an adhesive protective layer, ie not in the form of a coating.

Goods which have been shown to be particularly suitable for protecting pipelines, flanges, installed machinery and mechanical elements and others from atmospheric and electrochemical corrosion (or dissimilar metal contact corrosion). Name E17
The properties of the material commercially available at 0 are described below. This material is a polymeric coating material, does not contain a solvent, and can be peeled off and reused. The substance meets the following specifications: ASTM B117-97, 300 for saline mist
0 hour resistance ASTM G62-87, pinhole / stripping
day) detection ASTM G62-87, dielectric value (dielectric value;
Or dielectric value) ASTM G53-96, accelerated weathering

The substance is honey-colored and transparent, but can be colored as desired.

The flash point is 200 ° C. or higher.

As mentioned above, the substance does not contain a solvent and therefore does not contain any volatile organic components and does not contain other harmful additives. Thus, the sprayable material is a 100% solid, coating-like coating.

The material contains a suitable corrosion inhibitor. After the substance has been sprayed, the corrosion inhibitor is placed between the surface to be protected and the protective layer in the form of a coating.

The substance further comprises additives which enable it to be peeled off without reducing its cohesion (or adhesion or tackiness).

Further, the additive has, for example, a heat stabilizing effect.

The dielectric properties of the material are such that no dissimilar metal contact corrosion occurs between the coating-like protective layer and the surface to be protected.

A suitable layer thickness is 1.0 for normal corrosion.
１．５1.5 mm / 40-60 mils and 2.0-2.5 mm / 80-10 for very severe (aggressive) corrosion.
0 mil.

750 to 750 per pass during spraying
Layer thicknesses of 1000 μm / 80-100 mils can be obtained.

The protective layer is dry within 1 to 2 minutes to the touch, can be sprayed again after 5 to 10 minutes, dries sufficiently within 10 minutes, and thus the part to which it has been supplied. Can be handled normally.

If a recommended type of primer (or primer) is applied, it can be overcoated after 30 to 60 minutes.

The substance can be stored in its original packaging and stored at 20 ° C. for 36 months. The temperatures to be maintained are as follows: Melting temperature 140 ° C./284° F. Application temperature 170 ° C.-175 ° C./338° F.-344 °
F Maximum temperature 180 ° C / 212 ° F Maximum substrate temperature (or substrate temperature; substrate temperatur
e) 100 ° C / 212 ° F

The following preliminary work is recommended:
At least treat with a steel brush to remove floating dyes; usually further rinse base coat (or primer coat) with clean water; optimally wash base coat with high pressure by grinding until exposed metal surface is visible .

By using the above-mentioned substances, a triple protective effect is obtained: after mounting, the substances form a covering-like protective layer, which completely covers the surface to be protected without holes, Alternatively, the object to be protected is coated in a cocoon shape. Corrosion inhibitors prevent the progress of corrosion if, for any reason, the cover-like protective layer is punctured, either by unintentional damage or by deliberate manipulation of the protected object Maintain the effect, or maintain its effect as a temporary guard. Once the coating-like protective substance has been completely removed, the corrosion inhibitor remains effective until a new protective layer is applied.

[Brief description of the drawings]

FIG. 1 shows an example of a first embodiment of the device according to the invention in a partial sectional view.

FIG. 2 shows an example of a first embodiment of the device according to the invention in a partial sectional view.

FIG. 3 shows an example of the first embodiment of the device according to the invention in a partial sectional view.

FIG. 4 shows an example of a first embodiment of the device according to the invention in a partial sectional view.

FIG. 5 schematically illustrates a second embodiment of the device of the present invention, wherein the device is protected from explosion.

FIG. 6 shows an embodiment of a hose and spray gun protected from explosion of the device shown in FIG.

FIGS. 7A-C each show various nozzle arrangements for applying a substance to variously shaped surfaces.

FIG. 8 shows a third embodiment of the device of the present invention, which applies a substance to a immersed surface.

Claims (16)

[Claims] 1. Apparatus for applying a substance in a liquid state to a surface, comprising: a container for containing the substance in solid and liquid states; an applicator device connected to the container, capable of applying the substance to the surface. Applicator device; a heating device used for the container to bring the substance into a liquid state in the container and maintain the state; a pressure generating device for transporting the substance in the liquid state; A device characterized by being mounted. 2. A transport line for transporting a substance in a liquid state from a container to an applicator device, the transport line including an inlet connected to the container and an outlet connected to the applicator device, wherein the transport line is preferably insulated. The device according to claim 1, wherein the device is heatable. 3. Apparatus according to claim 1, wherein the applicator device is a spray gun, preferably a spray gun having an adjustable nozzle arrangement. 4. The apparatus according to claim 3, wherein the nozzle arrangement is a nozzle arrangement essentially designed to be complementary to the surface to which the substance is to be supplied. 5. The heating device according to claim 1, wherein the heating device is an electric heating device, and more preferably an adjustable electric heating device.
The device according to item. 6. The pressure generating device is preferably an adjustable pump arrangement, the arrangement comprising:
6. The method according to claim 1, further comprising a plurality of reversible piston pumps for applying the substance without pulsation.
The device according to item. 7. The apparatus according to claim 1, further comprising a filter for a substance supplied to the applicator device.
An apparatus according to any one of the preceding claims. 8. The device according to claim 1, further comprising a device arranged in the container for mixing or respectively stirring the substances. 9. The device according to claim 1, comprising a housing, in particular a housing with one or more individually removable opening covers. 10. A transport means for moving the device, for example rollers and / or holes or an annulus for suspending the device from a crane or helicopter are arranged in the structural member and / or the housing. Apparatus according to any of the preceding claims. 11. A gas detector and an emergency switch, whereby the device can be switched off if the gas detector detects a gas concentration that is too high and / or lasts too long. Claims 1 to 10
An apparatus according to any one of the preceding claims. 12. The transport line has an outer jacket and an inner jacket, wherein the inner jacket defines a space intended to transport the substance, and a space formed between the outer jacket and the inner jacket is under pressure. 12. The method according to claim 1, wherein the pressurization is monitored by a pressure monitor, and when the pressure in the space falls outside a predetermined pressure range, the switch-off is performed thereby. An apparatus according to claim 1. 13. A pressure line using compressed gas for an applicator device, specifically a spray gun, is located in the space formed between the outer jacket and the inner jacket, and the pressure in the pressure line is applied to the space. 13. The device of claim 12, wherein the pressure is greater than the pressure. 14. The device according to claim 1, wherein the space of the applicator device free of the substance to be applied and the pressure gas for the applicator device is filled with a suitable plastics material. Equipment. 15. The method according to claim 1, wherein the applied substance forms a coating on the surface and the tear resistance of the coating is greater than the force provided by the adhesion at the surface acting as a resisting peel of the coating. 15. Any one of claims 1 to 14, characterized by:
Use of the device described in paragraph. 16. The surface to which the substance is applied is a pipeline or a connector of a pipeline, in particular a pipeline or a connector of a pipeline on a crude oil drilling platform.
Use of an apparatus according to any one of the preceding claims.