KR20090051844A - Pre-heating equipment for casting weld in ship construction - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding preheating apparatus for ship castings for shipbuilding, and aims at preheating or heating a welding portion before and after welding operations for cast steel products having a constant thick size or shape during ship manufacture.

The present invention for achieving the object, a plurality of combustion burners for injecting a flame to a predetermined length when preheating the cast steel, and a flexible hose connecting each of the combustion burners The pre-heating unit, a gas supply unit for mixing and supplying the fuel gas and air introduced into the pre-heating unit, and the fuel gas supplied to the gas supply unit by using a thermocouple according to a preset preheating temperature using the cast steel product. The control unit for blocking when the worker reaches the desired temperature, characterized in that it comprises a control unit, a preheating unit and a gas supply unit is mounted, the moving wheel is installed to move the movable wheel.

According to the present invention, since a woven mat is installed to preheat the cast steel using a combustion burner in which a flame is injected to a predetermined length, the heat efficiency is good, and thus the preheating time is shortened and fuel can be saved.

Cast steel, preheat

Description

Pre-heating equipment for casting weld in ship construction

The present invention relates to a welding preheating device for shipbuilding castings, and provides a welding preheating device for shipbuilding castings for preheating or heating a welding part before and after welding work for a cast steel product having a thick size or shape that is not constant in the manufacture of a ship. I would like to.

In general, when manufacturing various structures required for a ship by welding a steel plate or cast steel product in the manufacturing process of a ship, a typical cast steel used for the structure of the ship is thick and irregular in shape. Has

These cast steel products include Bell Mouth, Leader Horn, Stern Tube / Boss, etc., and prevents cracking or warping caused by welding of the structure to be joined to the hull. In order to improve the workability according to the welding, a preheating device dedicated to welding of cast steel is used.

The cast steel welding preheater preheats or heats the welded portion at about 100 ° C to 150 ° C before and after the welding operation of the cast steel product, which is the structure of the ship. Such cast steel welding preheater is generally a gas torch (Gas Torch) used to heat the object to a high temperature.

The gas stove has a handle pipe in the form of a handle having an oxygen hose and a gas hose connected to the rear side thereof, and having a mixer of oxygen and gas at the front side thereof, and extending into the front of the handle pipe by a predetermined length and a fireball at the tip thereof. It consists of a heating pipe with a tip attached to it.

Such a gas torch holds a handle pipe of a preheating torch in a state where a worker is separated by a predetermined distance from the welded portion, and closes the tip of the heating pipe to the welded portion to perform preheating or heating operation such as an iron plate or cast steel.

However, since the conventional gas stove is formed of only one heating pipe on the front side of the handle pipe, it requires a large amount of equipment and manpower for welding a ship structure having a relatively large size and various shapes. there was.

Therefore, in order to solve the problem of the conventional gas torch, the cast steel structure to be preheated by connecting a copper pipe punched at regular intervals to a gas manifold serving as a heating pipe of the gas torch There is a cheap way to spray flames directly.

In addition, as a method of improving the above apparatus, a multi-pipe preheating torch (registration number: 10-0760363) for a shipyard welding operation that can be preheated by being separated into a plurality of pipes in one main pipe has been developed.

The multi-pipe preheating torch for welding work at the shipyard has an effect of simultaneously performing preheating or heating work by the injection tip of each branch pipe along the entire welding portion of the cast steel structure.

Therefore, even if the size of the cast steel structure is relatively large, preheating or heating can be performed very quickly and accurately with a minimum of equipment and manpower.

However, the preheating method using the multi-tubular preheating torch for shipyard welding operation is that the flame is formed by mixing fuel gas directly or with air, so that when the flame is preheated to the cast steel structure as it is, preheating due to incomplete combustion There is a problem that the soot is generated in the structure and additionally remove the soot for subsequent work.

In addition, the multi-pipe preheating torch for the shipyard welding operation because the length of the flame sprayed on each branch pipe is not constant, there is a problem that can not be preheated uniformly.

In addition, since the operator has to check the appropriate preheating temperature of the cast steel structure from time to time when preheating the cast steel structure of the ship by using the multi-pipe preheating torch for the shipyard welding work, there is a problem that the preheating work is very inconvenient and workability is inferior.

The present invention was created in order to solve the above problems, the object of which is that the length of the flame sprayed from the preheating device is constant, eliminating the inconvenience of additional removal work due to incomplete combustion during preheating work on the cast steel structure. The present invention provides a welding preheating device for shipbuilding for shipbuilding.

In addition, another object of the present invention is to provide a welding preheating apparatus for ship steel castings that can be easily applied according to the shape and size of the cast steel structure.

In order to achieve the above object, the welding preheating device for shipbuilding for shipbuilding includes a plurality of combustion burners for spraying flames with a predetermined length when preheating the cast steel structure, and a flexible hose connecting each of the combustion burners. A preheating unit including; A gas supply unit for supplying a mixture of fuel gas and air to the preheater; A control unit which blocks the fuel gas supplied to the gas supply unit when the cast steel reaches a desired preheating temperature by using a thermocouple according to a preset preheating temperature; The control unit, the preheating unit and the gas supply unit is mounted, characterized in that it comprises a travel cart that can be moved by moving wheels installed.

In addition, according to the present invention, the combustion burner, the main body constituting the main body; A T-shaped fitting fitting with the main body and connecting the respective preheating parts; A stopper for fitting to a portion where the preheating portion is not connected to the T-shaped fitting; An injection plate installed in the combustion burner and having a flame sprayed from the combustion burner; It is installed on the jet plate, characterized in that it comprises a woven mat for uniformly spraying the flame to a certain length.

In addition, the main body according to the present invention is provided on both sides of the main body, and a support for supporting the cast steel; It is formed on the other side of the support, characterized in that it comprises a main body (Socket) for coupling the T-shaped fitting.

In addition, the woven mat is made of a metal fiber, characterized in that the lattice shape is coupled laps at regular intervals.

And, it is installed on the preheating unit, characterized in that it further comprises a magnet-type detachable device to detachable to each of the preheater to the cast steel structure.

The welding preheating device for shipbuilding for shipbuilding according to the present invention is provided with a woven mat made of fine metal fibers in a combustion burner, which is a preheating part, so that the flame of the combustion burner is injected to a predetermined length to preheat the cast steel structure, resulting in incomplete combustion. There is an effect of reducing the occurrence of soot, and the thermal efficiency is good, there is an effect to shorten the preheating time and save fuel.

In addition, since the preheating of the cast steel structure using a flexible hose, there is an effect that can be easily applied to the complex shape, the detachable device using a permanent magnet or an electromagnet is formed in the preheating portion, It can be easily fixed and used.

In addition, since the control unit using the thermocouple sensor can be configured to shut off the fuel gas by the controller automatically when preheating the cast steel structure, the preheating operation can be terminated or the preheating setting can be performed. This has a rising effect.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the present invention will be described in more detail. The same parts as in the prior art will be described with the same reference numerals.

1 is a perspective view showing a welding preheating apparatus for shipbuilding steel products according to the present invention, Figure 2 is a perspective view showing a preheating unit according to the present invention, Figure 3 is a side view showing a preheating unit according to the present invention, Figure 4 is 5 is a side view showing a connection state with each preheating unit according to the present invention, FIG. 6 is a plan view showing a gas supply unit according to the present invention, and FIG. , A schematic configuration diagram of a ship welding steel preheating apparatus for shipbuilding according to the present invention, Figure 8 is a side view showing a state of use of the ship welding steel preheating apparatus for shipbuilding according to the present invention.

First, the welding preheating device for shipbuilding cast steel according to the present invention, when preheating the cast steel (鑄鋼 品), a plurality of combustion burners 120 for spraying a flame to a constant length, and each of the combustion burners 120 It is provided with a preheating unit 100 including a flexible hose 140 for connecting the.

The preheating unit 100 is used in close proximity to the welded portion of the cast steel structure in order to preheat the cast steel structure before and after the welding operation.

Here, the combustion burner 120 of the preheating unit 100, as shown in Figures 1 to 4, the main body 121 as the main body, the mixed gas outlet (121a) in front of the main body 121 is Is formed.

On the other side of the mixed gas outlet 121a, a main body socket 123 through which the mixed gas M mixed with air flows into the fuel gas G is formed. And, as shown in FIG. 4, the injection plate 124 is coupled to the fuel gas inlet 230.

The injection plate 124 is provided with a plurality of injection holes (not shown), and the mixed gas M is discharged through the injection holes (not shown). This is for the mixed gas M to be sprayed uniformly through the injection hole (not shown).

In addition, the woven mat 129 is further inserted above the jet plate 124. The woven mat 129 is made of a metal fiber, and a plurality of metal fibers are stacked in layers, and the individual surfaces of the metal fibers are melted at a high temperature to be finely bonded to each other. Since the breathability is high and the specific surface area is high, the spray plate 124 The sprayed flame has the effect of being discharged to a certain length.

In addition, the support base 122 is installed on both sides of the mixed gas outlet 121a. The support 122 is intended to support the welded portion of the cast steel structure to be spaced by a predetermined interval while preheating the preheating device in close proximity to the welded portion of the cast steel structure.

On the other hand, the preheating unit 100 is provided with a T-shaped fitting (Fitting) (125) that is coupled to the body socket 123 of the body 121. The T-shaped fitting 125 may be formed in the T-shaped fitting 125 to communicate with the main body socket 123, and a connector that is branched from the main body needle 126. 128 is formed.

The connectors 128 formed on both sides penetrate each other, and a flexible hose 140 to be described later is connected. In addition, the portion where the flexible hose 140 is not connected is sealed by inserting a stopper 127.

On the other hand, the flexible hose 140 is coupled to the connector 128 formed in the T-shaped fitting 125, and serves to connect the plurality of preheating unit 100, at the same time can be freely moved depending on the use state Let's do it.

Here, the flexible hose 140 is briefly described as follows. The flexible hose 140 is excellent in elasticity, operability (flexibility, flex resistance), pressure resistance, heat resistance, corrosion resistance (chemical resistance), and the like, and particularly excellent in flex resistance and flexibility, such as connection pipes and vibration piping of mobile devices. use.

In addition, a connection socket 142 is formed at one side of the flexible hose 140.

On the other hand, it is provided in the preheating unit 100, and each of the preheating unit 100 is provided with a magnet attachment and detachment device 160 to detachable to the cast steel structure (F).

The detachable device 160, as shown in Figure 2 for attaching and detaching the preheating unit 100 to the cast steel structure (F), a magnet device 162 for attaching to the cast steel structure (F), It is composed of a ring 164 connecting the magnet device 162 and the preheating unit (100).

Here, the magnet device 162 is attached to the cast steel structure (F) using a permanent magnet or an electromagnet. This is for fixing the preheating part 100 to the welding part to be preheated of the cast steel structure (F).

In addition, the ring 164 formed on the detachable device 160 is to be mounted on the cast steel structure (F) to be attached to the preheating unit (100).

On the other hand, the welding preheating apparatus for shipbuilding cast steel according to the present invention includes a gas supply unit 200 for supplying a mixture of fuel gas and air to the preheating unit (100).

The gas supply unit 200 is provided with a gas line 210 which is a main body, and serves to transfer the mixed gas mixed with fuel gas and air to the preheater 100. Here, the gas supply unit 200 is formed with a fuel gas inlet 230 through which fuel gas flows, and an air inlet 240 through which air flows to the other side is formed.

In addition, a fuel gas control valve 232 and an air control valve 242 are installed inside the fuel gas inlet 230 and the air inlet 240 so as to control the amount of fuel gas and air, respectively.

Meanwhile, the fuel gas introduced from the fuel gas inlet 230 and the air introduced from the air inlet 240 join the gas mixing unit 250 of the gas line 210.

Here, a solenoid valve 220 is installed between the gas mixing part 250 and the fuel gas inlet 230 to control the flow of fuel gas.

The solenoid valve 220, when the preheating temperature preheated to the cast steel structure (F) in the control unit 300 to be described later, sends a cutoff signal to the solenoid valve 220 so as not to preheat the gas line ( It serves to block the fuel gas flowing to 210.

Meanwhile, the mixed gas in which the fuel gas and the air are mixed in the gas mixing unit 250 is discharged through the mixed gas outlet 260 formed in plural in the gas line 210. In the mixed gas outlet 260, a mixed gas control valve 262 is installed to adjust the amount of the mixed gas.

Meanwhile, the welding preheating apparatus for shipbuilding cast steel according to the present invention uses the thermocouple sensor 360 according to a preset preheating temperature to supply the fuel gas supplied to the gas supply unit 200. ) And a control unit 300 for blocking when the operator reaches the desired temperature.

As illustrated in FIG. 7, the controller 300 inputs a material and a welding amount of the cast steel structure F welded by the input unit 310. Then, the preheating data corresponding to the value input by the input unit 310 is withdrawn from the memory unit 320 so that the preheating setting is automatically performed during the preheating operation.

Here, the memory unit 320 is pre-heated data according to the input value.

Meanwhile, the preheat setting value received from the input unit 310 as described above is stored in the internal memory in the comparison unit 330, and the preheating of the welding portion of the cast steel structure F is performed from the thermocouple sensor 360 connected to the control unit 300. The temperature is read and compared with the preheat setting value stored in the memory unit 320.

At this time, when the welded portion of the cast steel structure (F) is lower than the preheating set value, the signal is sent to the adjusting unit 340, and the adjusting unit 340, which receives the signal, is uploaded as an electrical signal therein and then the driving unit 350 Send an electrical signal to).

On the other hand, in the drive unit 350 receives the electrical signal, by opening the solenoid valve 220 installed in the gas line 210 by a signal to flow a large amount of fuel gas (G), the fuel gas (G) is air It is mixed with (A) and sent to the preheater 100.

In this case, the mixed gas M is bi-divided into the respective preheating units 100 connected to the gas supply unit 200 in the same amount to increase the amount of heat preheated to the welded portion of the cast steel structure F.

On the other hand, when the preheating temperature detected from the thermocouple sensor 360 located at the welded portion of the cast steel structure F is higher than the set value set in the input unit 310, the comparator 330 detects the thermocouple sensor 360 in real time. In order to lower the heating amount of the preheater 100 by checking the preheating temperature and the set value of the input unit 310, when the signal is sent to the adjuster 340, the adjuster 340 transmits a signal to the previously received signal. The electrical signal is generated and sent to the driving unit 350.

In addition, the driving unit 350 closes the open solenoid valve 220 to reduce the amount of fuel gas G going to the gas mixing unit 250, thereby providing the mixed gas M supplied to the preheating unit 100. ) Is reduced and the heating amount of the preheater 100 is lowered.

On the other hand, the welding preheating apparatus for shipbuilding cast steel according to the present invention, the control unit 300, the preheating unit 100 and the gas supply unit 200 is mounted, the moving wheel 410 is installed traveling wheels that can move (400) It characterized by including).

The traveling cart 400 has a preheating loading box 420 capable of mounting a plurality of the preheating unit 100, and has a lower end portion at which the gas supply unit 200 is installed below the preheating loading box 420. 440 is formed.

A handle 460 for an operator grip is installed on one side of the traveling cart 400, and a warning light 480 is installed on the upper side of the traveling cart 400 to inform the situation during the preheating operation. In addition, a moving wheel 410 for moving the traveling cart 400 is installed at the lower end of the traveling cart 400.

Next, a state of use of the welding preheating apparatus for shipbuilding steel products according to the present invention will be described with reference to FIG.

First, the preheating unit 100 of the preheating apparatus is connected to the size and shape of the welding portion of the cast steel structure (F) to be preheated. In this case, the flagble hose 140 is inserted between the plurality of preheating parts 100.

Next, the plurality of connected preheating units 100 are coupled to the mixed gas outlet 260 of the gas supply unit 200 installed in the travel truck 400.

Here, after the preheating unit 100 is located at the welded portion of the cast steel structure F to be preheated, the preheating unit 100 is hooked with a ring 164 formed on the detachable device 160 on the preheating unit 100. The preheating part 100 is fixed by attaching the magnet device 162 formed at the other side of the hook 164 to the cast steel structure F.

Next, the fuel gas inlet 230 and the air inlet 240 of the gas supply unit 200 to adjust the fuel gas (G) and air (A) in an appropriate amount to flow in the gas line 210.

At this time, the gas mixture 250 is mixed to generate a mixed gas M, and the mixed gas M is discharged to the plurality of mixed gas outlets 260. At this time, the mixed gas (M) is moved to the preheating unit 100 connected to the mixed gas outlet 260.

Next, after the power switch (not shown) of the control unit 300 is turned on, the material and the welding amount of the cast steel structure F to be welded to the input unit 310 of the control unit 300 are input.

Then, the preheating data corresponding to the value input by the input unit 310 is withdrawn from the memory unit 320 so that the preheating setting is automatically performed during the preheating operation.

Meanwhile, the preheat setting value received from the input unit 310 as described above is stored in the internal memory in the comparison unit 330, and the preheating of the welding portion of the cast steel structure F is performed from the thermocouple sensor 360 connected to the control unit 300. The temperature is read and compared with the preheat setting value stored in the memory unit 320.

At this time, when the welded portion of the cast steel structure (F) is lower than the preheating set value, the signal is sent to the adjusting unit 340, and the adjusting unit 340, which receives the signal, is uploaded as an electrical signal therein and then the driving unit 350 Send an electrical signal to).

On the other hand, in the drive unit 350 receives the electrical signal, by opening the solenoid valve 220 installed in the gas line 210 by a signal to flow a large amount of fuel gas (G), the fuel gas (G) is air It is mixed with (A) and sent to the preheater 100.

In this case, the mixed gas M is bi-divided into the respective preheating units 100 connected to the gas supply unit 200 in the same amount to increase the amount of heat preheated to the welded portion of the cast steel structure F.

Meanwhile, when the preheating temperature detected by the thermocouple sensor 360 located at the welded portion of the cast steel structure F reaches the preheating temperature set in the input unit 310, the preheating detected by the thermocouple sensor 360 in real time in the comparator 330. The process of comparing the temperature with the set value of the input unit 310 is checked.

In addition, in order to lower the heating amount of the preheater 100, when a signal corresponding thereto is sent to the adjusting unit 340, the adjusting unit 340 generates an electrical signal according to the previously received signal and sends it to the driving unit 350.

In addition, the driving unit 350 closes the open solenoid valve 220 to reduce the amount of fuel gas G going to the gas mixing unit 250, thereby providing the mixed gas M supplied to the preheating unit 100. The amount of) decreases, the heating amount of the preheating unit 100 is lowered, and the preheating operation of the welded portion of the cast steel structure F is completed.

In the above, the preferred embodiment of the present invention has been described by way of example, but the scope of the present invention is not limited only to such specific embodiments, and may be appropriately changed within the scope described in the claims.

1 is a perspective view showing a welding preheating device for shipbuilding for ships according to the present invention,

2 is a perspective view showing a preheating unit according to the present invention;

3 is a side view showing a preheating unit according to the present invention;

4 is a sectional view showing a preheating unit according to the present invention;

5 is a side view showing a connection state with each preheating unit according to the present invention;

6 is a plan view showing a gas supply unit according to the present invention;

7 is a schematic configuration diagram of a welding preheating apparatus for shipbuilding cast steel according to the present invention,

8 is a side view showing a state of use of the welding preheating apparatus for shipbuilding cast steel according to the present invention.

♣ Brief description of the main parts of the drawing ♣

100: preheating unit 120: combustion burner

121: main body 122: support

123: body socket (124): jet plate

125: T-shaped fitting 126: main body nipple

127: stopper 128: connector

129: woven mat 140: flexible hose

142: connection socket (Socket) 160: removable device

200: gas supply unit 210: gas line (Gas Line)

220: Solenoid Valve

230: fuel gas inlet 232: fuel gas control valve

240: air inlet 242: air control valve

250: gas mixing unit 260: gas mixture outlet

262: mixed gas control valve 300: control unit

310: input unit 320: memory unit

330: comparison unit 340: adjustment unit

350: driving unit 360: thermocouple sensor

400: driving cart 410: moving wheel

420: preheating unloaded 440: lower part

460: handle 480: warning lights

Claims (5)

When preheating the cast steel structure F, a preheating part including a plurality of combustion burners 120 for spraying flames to a predetermined length, and a flexible hose 140 connecting the combustion burners 120 to each other. 100; A gas supply unit 200 for supplying a mixture of fuel gas and air to the preheater 100; A control unit 300 which blocks the fuel gas supplied to the gas supply unit 200 when the cast steel structure F reaches a desired temperature by using a thermocouple according to a preset preheating temperature; The control unit 300, the preheating unit 100 and the gas supply unit 200 is mounted, the cast iron welding preheater for ships, characterized in that it comprises a traveling wheel 400 which can be moved by moving wheel 410 is installed. . The method of claim 1, The combustion burner 120, A main body 121 constituting a main body; A T-shaped fitting (125) coupled to the main body (121) to connect the respective preheating parts (100); A stopper 127 for fitting to a portion where the preheating part 100 is not connected to the T-shaped fitting 125; An injection plate 124 installed at the combustion burner 120 and having a flame sprayed from the combustion burner 120; Installed in the jet plate 124, welding preheating device for shipbuilding cast steel, characterized in that it comprises a woven mat (129) for uniformly spraying a flame to a predetermined length. The method of claim 2, The main body 121, Support members 122 installed at both sides of the main body 121 and supporting the cast steel structure F; Formed on the other side of the support (122), welding preheating apparatus for shipbuilding cast steel for ships characterized in that it comprises a main body (Socket) (123) for coupling the T-shaped fitting (125). The method of claim 2, The woven mat 129 is made of metal fibers, the welding preheating device for shipbuilding cast steel, characterized in that the lattice form coupled to the lap at a predetermined interval. The method of claim 1, Installed in the preheating unit 100, welding pre-heating cast steel for ships, characterized in that it further comprises a detachable device 160 in the form of a magnet so as to attach and detach each of the preheating unit 100 to the cast steel structure (F) Device.

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