KR102579804B1 - Heating oven for pre-heating, post heating and curing of metallic tank, pipe, pipe spool - Google Patents

Abstract

The present invention is a liquid paint or heat melt adhesive that is applied to the surface of a metal tank, pipe, fitting, pipe spool, or valve by preheating before painting, painting, heating after painting, or curing after painting. This relates to a heating oven that uses plastic powder as a coating material to improve painting quality and painting productivity during the painting process or before and after painting.
In addition, the heating oven of the present invention described above is mainly of a rectangular parallelepiped structure, and the front or front and upper surfaces are opened and closed by a hydraulic system and a hydraulic cylinder, and two or more rare earth catalytic far-infrared ray emitting gas burners are installed on the floor or wall or floor and wall inside the heating oven. Arranged to form a heat source, or two or more far-infrared ray-emitting ceramic heating pads are arranged on the floor, wall, or ceiling of the heating oven as a heat source, or two or more rare earth catalytic far-infrared ray-emitting gas burners are installed on the floor of the heating oven. Save energy by configuring two or more far-infrared ray-radiating electric heat rays or far-infrared ray-emitting ceramic heating pads on the wall or ceiling as heat sources, or by selecting one or two thermal energy sources among a rare earth catalytic far-infrared ray-emitting gas burner and electric heating ray far-infrared ray-emitting ceramic heating pads. It is about a heating oven that has the effect of reducing costs.
In addition, the heating oven of the present invention is composed of mineral wool, which is an insulating material and emits far-infrared rays that have the property of penetrating into the surface layer of the painted material on the surface of the painted object of the metal tank, pipe, fitting, pipe spool, and valve, as an interior material. Rare earth applied to the surface of the heating element of a rare earth catalytic far-infrared radiation gas burner acts as a catalyst to separate the oxygen-containing air in the heating oven into carbon dioxide and water (H2O) and reduce it while burning, causing oxidation on the surface of the painted object. A rare earth catalytic far-infrared ray emitter and gas burner that reduces or eliminates the bluing phenomenon that appears on the surface of a heated painted object applied in a heating oven, which is a result of oxidation and oxidation phenomena, and two or more The heating oven consists of two or more bottom rails facing each other and arranged parallel to each other, and a painting cart with lower wheels moves in and out of the heating oven through the bottom rail, and as a heat source in the heating oven. To ensure that there is no shortage of oxygen in the air during combustion, a hole with a diameter of 100 mm or more is made on the front, side, or top of the heating oven, and a damper, a valve for forced air circulation, is installed to prevent oxygen in the heating oven during the combustion and heating process. By preventing oxygen shortage and discharging excessive heat, it has the effect of controlling the amount of heat energy within the heating oven and preventing risks from fire or explosion.

Description

Heating oven for pre-heating, post heating and curing of metallic tank, pipe, pipe spool}

The present invention relates to a heating oven for painting, heat treatment, or curing of tanks, pipes, and pipe spools. More specifically, it relates to corrosion resistance and adhesion on the surface of metal tanks, pipes, or pipe spools in order to prevent corrosion occurring during use after painting. In order to paint two-component liquid epoxy or urethane, or to powder coat epoxy, urethane, epoxy-urethane hybrid, F.B.E., or polyethylene heat melt adhesive plastic powder using the heat melt adhesive method, before painting. It is a heat-generating oven necessary for the purpose of preheating, post-heat-treating, or hardening the surface of a metal tank, pipe, or pipe spool to be painted by placing it in the heat-generating oven of the present invention. Additionally, the heat-generating oven of the present invention is a heat-generating oven needed to heat a metal tank, pipe, or pipe spool. It is placed in a heating oven and heated to a surface temperature of 50 to 350°C. During heating, the carbon monoxide generation rate is low to prevent oxidation, which reduces the adhesion of the paint or paint, and air containing oxygen is converted to carbon dioxide and water. It is a rare earth catalytic far-infrared ray emitter in which rare earth elements, which act as a catalyst for separation and reduction, are applied to the heating element. It is composed of at least two rare earth catalytic far-infrared ray emitting gas burners as heating elements arranged with an appropriate amount of space apart, and two catalytic far infrared ray emitters are used. Painting cart-type rails are arranged in the space between the gas burners, and the carts for painting work are placed on the arranged cart rails to facilitate movement between the inside and outside of the heating oven, saving time and energy in heating the surface temperature to 50 to 350℃. It relates to a heating oven for pre-heating or post-heat treatment or curing before painting of metal tanks, pipes or pipe spools, which has the characteristics of improving painting productivity and quality.

As is well known, metal tanks, pipes, pipe spools, fittings, and valves are devices or piping materials widely used in industrial plant facilities on ships or on land. During use, water, seawater, crude oil, acids, and alkalis are exposed to the surface. If it comes in contact with a corrosive liquid or gas, severe corrosion occurs and its service life does not last long, so two-component liquid paints such as epoxy or urethane or paints such as epoxy, urethane, or F.B.E (Fusion Bonded Epoxy) are used. Alternatively, in order to apply heat melt adhesive plastic powder to the surface of a device or piping material heated to a surface temperature of 100 to 350°C with an appropriate film thickness, an exothermic oven must be used to preheat before painting, perform post-heat treatment after painting, or cure after painting. This is needed.

At this time, the heating oven for preheating, post-heat treatment, and hardening the surfaces of the above-mentioned metal tanks, pipes, and pipe spools before painting is preferably a heating oven that achieves the required temperature as quickly as possible, while saving energy and stably.

As prior technologies for such heating ovens, Korea Registered Utility Model No. 20-0284370 (registration date July 23, 2002) ‘Marine piping pipe oven type painting system’ and Korea Registered Utility Model No. 20-0284369 (registration date 2002) July 23, 2008) ‘Marine piping pipe oven type painting system pallet’ etc. are launched.

However, in the prior art, gas or oil is ignited using an igniter. By burning, the air inside the heating oven is converted into hot air and the temperature inside the heating oven is increased by the hot air supply means that blows the air heated by combustion into the heating oven through the blower, thereby thermal melting of epoxy, urethane, FB, and polyethylene. It takes a long time to reach a predetermined temperature of around 100 to 350℃, where adhesive plastic resin powder melts and bonds with heat, so preheating, painting, post-heat treatment, or curing takes a long time, resulting in a lot of time and energy consumption, making it uneconomical and generating heat. In the process of heating the air in the oven, a lot of carbon monoxide is generated, which causes oxidation on the surface of the metal tank, pipe, and pipe spool to be painted, reducing the adhesion between the surface layer of the painted material and the surface of the metal object to be painted. There was a problem with a high defect rate.

(0001) Republic of Korea Registered Utility Model No. 20-0284370 (registration date: July 23, 2002) (0002) Republic of Korea Registered Utility Model No. 20-0284369 (registration date: July 23, 2002) (0003) Republic of Korea Patent No. 10-0474300 (registration date: February 22, 2005) (0004) Republic of Korea Patent Publication No. 10-2009-0042658 (publication date April 30, 2009)

The present invention was devised to solve the conventional problems as described above. The purpose of the present invention is to increase the temperature in the oven in a short time to shorten the time for preheating, post-heat treatment or curing, and to save energy. The goal is to provide a heating oven for pre-heating, post-heat treatment, and curing before painting that improves painting quality while saving money during the painting process without generating carbon monoxide or post-heat treatment or curing.

In order to achieve the above object, the present invention provides a heating oven for preheating metal tanks, pipes, pipe spools, fittings, and valves before painting, post-heating after painting, or curing after painting, in which the front or front and upper surfaces are upper, lower, or cylindrical. It is opened and closed by a hydraulic cylinder in the upward direction, and has a frame and frame made of glass wool or mineral wool, which is a far-infrared ray emitter and insulating material, as an interior material, and two or more rare earth catalytic far-infrared ray-radiating gas burners are installed on the floor or wall or between the floor and wall within the heating oven. As a heat source, it has a structure arranged at a predetermined distance to generate heat, and a painting work cart equipped with wheels at the bottom of the space between two or more rare earth catalytic gas burners that generate heat by arranging them at a predetermined distance is the oven frame. The technical idea is to arrange a plurality of floor rails to allow entry and exit from the inside and outside, and to configure one or more dampers, which are forced air circulation control valves, on the front or upper surface of the heating oven or on the front and upper surfaces.

As a heat source generated within the heating oven, two or more electric heating wire-type far-infrared ray-radiating ceramic heating pads are arranged and wired on the inside of the floor, wall, or ceiling at a predetermined distance to generate heat by electric heat, and two or more electric heating pads are placed on the floor. Bottom rails facing each other and parallel to each other and one or more dampers, which are forced air circulation control valves, can be configured on the front or upper surface or on the front and upper surfaces of the heating oven.

The heating oven generates heat by using two or more rare earth catalytic far-infrared ray emitting gas burners as heat sources on the bottom of the oven, arranged at a predetermined distance, and is equipped with wheels at the bottom of the space between the two or more rare earth catalytic gas burners. A plurality of floor rails for painting work carts are arranged so that the work carts can move in and out of the oven frame, and two or more electric heating type far-infrared ray-radiating ceramic heating pads are installed at a predetermined distance on the inside of the floor, wall, or ceiling to provide heat source. It can be configured with one of the other.

According to the present invention implemented as the above-described solution, the temperature inside the chamber is raised to a predetermined temperature of 100 to 350°C in a short time by a catalytic far-infrared ray-emitting gas burner, an electric heating wire-type ceramic heating pad that radiates far infrared rays and heat, and mineral wool. It shortens the heating time, saves energy, and blocks the heating energy of the plurality of rare earth catalytic far-infrared ray-radiating gas burners or far-infrared ray-radiating ceramic heating pads, which are the heat sources in the heating oven, by using a gas regulator panel or power control regulator. It saves energy by controlling the amount of energy and eliminates the oxidation phenomenon caused by carbon monoxide. By emitting far-infrared rays, it emits far-infrared rays to reduce the temperature difference in the surface layer of the painted object coated with paint or heat-melt adhesive plastic powder. It has the effect of improving painting quality, such as eliminating pinholes caused by gas generation and increasing the adhesion of painting materials.

In addition, according to the present invention, a painting work cart equipped with a painting jig for placing a painting object heated at a high temperature of 100 to 350° C. is moved in and out of the heating oven through the bottom rail to achieve fast and stable painting work. It has the effect of making heat treatment or hardening process easy and safe after painting.

Figure 1 is a perspective view showing the front according to an embodiment of the present invention.
Figure 2 is a perspective view showing a side according to an embodiment of the present invention.
Figure 3 is a perspective view showing the rear according to an embodiment of the present invention.
Figure 4 is an enlarged view of portion 'A' of Figure 1.
Figure 5 is a perspective view showing the interior of a chamber according to an embodiment of the present invention.
Figure 6 is a perspective view showing the arrangement structure of an igniter and a far-infrared ray-emitting gas burner according to an embodiment of the present invention.
Figure 7 is a perspective view showing a ceramic heating pad according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the attached drawings.

Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This example is provided to more completely explain the present invention to those with average knowledge in the art.

Accordingly, the shapes of components expressed in the drawings may be exaggerated to emphasize a clearer explanation, and it should be noted that the same members may be indicated by the same reference numerals in each drawing.

Additionally, detailed descriptions of well-known functions and configurations that are judged to unnecessarily obscure the gist of the present invention may be omitted.

The heating oven according to an embodiment of the present invention includes a front door 3000, an oven frame 100 consisting of a top surface, both sides, and a rear surface.

And the oven frame 100 is opened and closed in the up and down or upward direction of the circumference through a hydraulic cylinder 400 connected to the hydraulic system on the front and upper surfaces of the door 300, or a hinge 340 connected to the hydraulic cylinder 400. .

The heating oven according to the embodiment of the present invention has two or more floor rails (600) on the floor on which a painting work cart (500) equipped with a jig (510) for placing the painted object can be moved in and out of the heating oven. It is composed of a structure arranged in parallel, facing each other.

The heating oven according to an embodiment of the present invention is composed of two or more rare earth catalytic far-infrared radiation gas burners 250 arranged at a predetermined distance on the floor 101 or the floor 101 and the wall of the heating oven. do.

A hinge ( 340).

According to an embodiment of the present invention, it includes two or more electric heating wire-type ceramic heating pads 200 that are installed on the inner floor 101, wall, or ceiling of the oven frame 100 and emit far-infrared rays and generate heat.

Referring to Figures 1 to 3, the oven frame 100 is formed in the shape of a rectangular parallelepiped with the front or front and top surfaces open and closed and long in the horizontal direction.

Referring to FIG. 4, the oven frame 100 includes a rectangular chamber frame 110 and a plurality of rare earth catalytic far-infrared ray emitting gas burners 120 arranged at a predetermined distance on the bottom or wall of the chamber frame 110. , a gas burner stand (not shown) that fixes the position and height of the rare-earth catalytic far-infrared ray-emitting gas burner 120, and is attached to the inner surface of the oven frame 100 and serves as a rare-earth catalytic far-infrared ray-emitting gas burner or an electric heating wire-type ceramic heating pad. It includes a chamber mineral wool (130) that radiates far-infrared rays while serving as an insulating material for the heat source (200).

The chamber frame 110 is a component that forms the frame of the oven frame 100, and this chamber frame 110 is made of a durable metal square pipe.

Chamber mineral wool (130) is an insulating material made by melting glass or rock with a high heat resistance temperature and compressing and expanding it at high temperature and high pressure. It has excellent insulation and fire resistance and emits far-infrared rays along with the heat source, followed by post-painting heat treatment or post-painting hardening process. When heat-melt bonding plastic powder is applied to the surface of a painted object, it suppresses the generation of gas generated in the surface layer of the heat-melt bonded paint material or the creation of pinholes that occur when the gas does not escape properly, and increases the adhesion of the surface layer of the painted material. and stabilizes the painted surface.

The main heat source built into the oven frame 100 is arranged at predetermined intervals on the bottom 101 of the oven frame 100 and comes from a storage tank of natural gas (LNG) or liquefied propane gas (LPG) outside the heating oven. A gas solenoid valve (not shown) that supplies the supplied gas through the gas nozzle of the rare earth catalytic far-infrared radiation gas burner 250, and liquefied natural gas (LNG) or liquefied propane gas (LPG) supplied through the gas solenoid valve. An igniter pin 260 that ignites a flame for combustion is installed, and an electric signal is provided to generate a flame that ignites the combustion gas, such as natural gas or liquefied propane gas, through fine and numerous holes through the igniter pin 260. It generates heat by burning the combustion gas with an igniter (not shown) that controls the catalytic action, and rare earth elements are applied to separate the air containing oxygen and moisture into carbon dioxide and water (H2O) without carbon monoxide, which causes oxidation, and then reduce it. It is implemented as a rare earth catalytic far-infrared ray emission gas burner (250) with a heating element coated with rare earth.

One of the heat sources built into the oven frame 100 is attached at predetermined intervals to the bottom 101 of the oven frame 100, or to the inner wall or ceiling, and penetrates into the body through a plurality of electric heating wires that generate electric heat and radiate far-infrared rays. It is implemented as an electric heating wire type ceramic heating pad (200).

The above-mentioned electric heating wire type ceramic heating pad 200 generates heat by electric resistance through an electric heating wire penetrating the ceramic pad, and the ceramic pad, which is a heating element, radiates far infrared rays, and is connected to the bottom 101 of the oven frame 100 or The electric heating wire type ceramic heating pad main body 210 arranged at predetermined intervals on the wall or ceiling, and the electric heating wire (not shown) and wiring (not shown) that supply power by electrically wiring the electric heating wire ceramic heating pad 210 to generate heat. Includes.

Heating using far-infrared rays emitted from the electric heating wire ceramic heating pad 200, chamber ceramic wool 130, and cover ceramic wool 320 reduces heat loss, shortens heating time, and saves energy. In addition, since it is easily arranged and configured on the floor (101), wall, or ceiling inside the heating oven of the present invention along with the rare earth catalytic far-infrared ray emitting gas burner (250), heating energy is reinforced when the necessary heating energy in the heating oven is insufficient. It plays a role in preheating before painting or post-heat treatment after painting, and in the process of curing, the surface layer of the painted material is heated and radiates far-infrared rays, which are generated in the surface layer of the painted material during the process of melting and adhering by the heat of the painted material's surface layer. In order to speed up the gas discharge rate and prevent the occurrence of pinholes due to gas emissions from the coating material during the heat melt bonding process, the rare earth catalytic far-infrared radiation gas burner 250 of the present invention is used as the main heat source of the heating oven. Compose.

The door 300 serves as an entrance for putting or taking out painted materials into the oven frame 100, and moves the front or front and upper surface (ceiling) up and down through the hydraulic system and the hydraulic cylinder 400 connected to the hydraulic system. It operates to open and close.

1 to 3, the door 300 includes a hydraulic cylinder 400 connected to one side of the upper surface of the oven frame 100, and a hydraulic movement of a hinge 340 connected to the plunger 410 of the hydraulic cylinder 400. The front 300 or the front 300 of the oven frame 100 is opened and closed by moving up and down, or the front 300 and the upper surface are moved together in the upward direction of the circumference to open and close.

The interior material of the inner core of the oven frame 100 and the cover frame 310 includes mineral wool 320 with a thickness of 100 to 300 mm, which has good thermal insulation properties and emits far-infrared rays.

The cover frame 310 forms the frame of the oven frame 100 and is made of square pipes made of a highly durable metal material.

And the cover frame 310 is a front frame 311 formed to open and close the open front of the oven frame 100, and a top frame 312 that is connected at a right angle to the top of the front frame 311 and constitutes the oven frame 100. ), can include both side frames and rear frames.

Mineral wool (320) is made by melting glass or rock at high heat and compressing it under high temperature and pressure. It is an insulating material and thermal insulation material made by expanding, and has excellent insulation, heat retention, and fire resistance. It emits far-infrared rays along with the heat source, and can be expected to stabilize the surface layer of the painted surface layer during painting with subsequent painting materials, post-heat treatment after painting, or curing after painting.

In addition, the inner and outer surfaces of the mineral wool 320 are covered with metal lath 330 to prevent powder scattering of the mineral wool 320 due to heat generation.

The hydraulic pump system (not shown), the hydraulic cylinder 400, and the plunger 410 of the hydraulic cylinder 400 have the function of opening and closing the front or front and upper surfaces of the oven frame 100 by moving them up and down or in the upward direction of the circumference. do.

Referring to Figures 1 and 2, the actuator is mounted on one side of the oven frame 100 and is implemented as a hydraulic cylinder 400 having a plunger 410 connected to open and close the cover frame 310.

An electric signal operation panel 420 is provided on one side of the oven frame 100 to control the operation of the actuator.

The actuator rotates the door 300 or the cover frame 310 in the upward direction of the circumference around the hinge 340 to open or close the oven frame 100 as shown in FIGS. 1 and 2. do.

In accordance with the implementation of the present invention, by arranging on the bottom of the oven frame 100, heavy painted objects such as metal tanks, pipes, and pipe spools can be easily moved in and out of the oven frame 100 for preheating, painting, or after painting. In order to heat treat, depending on the shape of the painted object, a painting workbench equipped with a jig 510 at the top for placing it on the painting cart 500 or a floor so that the wheels of the painting workbench can move in and out of the frame oven 100. Two or more bottom rails 450 facing each other and arranged in parallel are arranged on the floor between rare earth catalytic far-infrared ray emitting gas burners 250 arranged at a predetermined distance.

According to the embodiment of the present invention configured as described above, the internal temperature of the oven frame 100 is maintained at a predetermined temperature within a short period of time by the ceramic heating pad 200, chamber ceramic wool 130, and cover ceramic wool 320 that emit far-infrared rays. It not only shortens drying time and saves energy, but also prevents scattering of fine powder and eliminates oxidation caused by carbon monoxide, which has the advantage of improving the quality of the painted surface layer.

In addition, the present invention is a device for discharging heat and carbon monoxide due to insufficient heat generation of a gas burner or excessive heat generation due to incomplete combustion due to insufficient oxygen in the air during the process of generating heat by burning combustion gas in a heating oven or generating heat using electric heat. An air damper (Damper, 700), which is a forced air vent and supply/exhaust valve that circulates air forcibly, is installed on the front or front and upper surface and used as a forced air supply/exhaust control to supply oxygen or prevent damage caused by excessive heat or incomplete combustion. This includes installing and configuring it to emit carbon monoxide.

The embodiments of the present invention described above are merely illustrative, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

However, it should be noted that the present invention is not limited to the scope described with reference to the above-described embodiments.

Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims, and the present invention includes the technical spirit defined by the appended claims and all modifications, equivalents, and works within the scope thereof. It should be understood to include substitutes.

100: Chamber 110: Chamber frame
120: Firebrick 130: Chamber ceramic wool
200: Electric heated ceramic heating pad
250: Rare earth catalytic far-infrared radiation gas burner
300: Cover
310: Cover frame 320: Cover ceramic wool
330: Metallas 400: Hydraulic cylinder
500: Truck for painting work 510 : Jig for painting ( zig )
600: Bottom rail 700 : (Air vent ) Damper

Claims (3)

In a heating oven for preheating metal tanks, pipes, pipe spools, fittings, and valves before painting, post-heating after painting, or curing after painting,
The front or front and upper surfaces are opened and closed by hydraulic cylinders in the up-down or circumferential direction, and the frame and frame and floor or wall inside the heating oven are made of 100 to 300 mm thick mineral wool that radiates far-infrared rays, which is a far-infrared ray emitter and insulating material. Alternatively, two or more rare earth catalytic far-infrared ray emitting gas burners on the floor and walls are arranged at a predetermined distance as heat sources to generate heat, and two or more rare earth catalytic gases are arranged at a predetermined distance to generate heat. A plurality of floor rails are arranged so that a painting work cart equipped with wheels can move in and out of the oven frame at the bottom of the space between the burners, and a damper, which is one or more forced air circulation control valves, is installed on the front or upper surface of the heating oven or on the front and upper surfaces. Configure,
The heating oven generates heat by using two or more rare earth catalytic far-infrared ray emitting gas burners as heat sources on the bottom of the oven, arranged at a predetermined distance, and is equipped with wheels at the bottom of the space between the two or more rare earth catalytic gas burners. A plurality of floor rails for moving the painting work cart are arranged so that the work cart can move in and out of the oven frame, and a predetermined area is installed on the inside of the floor, wall, or ceiling to generate heat by electric resistance through an electric heating wire penetrating a ceramic pad that emits far-infrared rays. A heating oven for preheating, post-heating, and curing of metal tanks, pipes, and pipe spools, characterized in that two or more electric heating wire-type ceramic heating pads are installed at a distance of , and configured together with one of the heat sources. In claim 1,
As a heat source generated within the heating oven, two or more electric heating wire-type far-infrared ray-radiating ceramic heating pads are arranged and wired on the inside of the floor, wall, or ceiling at a predetermined distance to generate heat by electric heat, and two or more electric heating pads are placed on the floor. For pre-heating, post-heat treatment and hardening of metal tanks, pipes and pipe spools, characterized in that the floor rails face each other and are parallel to each other and one or more dampers, which are forced air circulation control valves, are formed on the front or upper surface or the front and upper surfaces of the heating oven. Heating oven. delete