KR100876611B1 - High frequency heating apparatus - Google Patents

Abstract

A high frequency heating apparatus increases welding efficiency by smoothening the flow of the electric current since a resistance element disturbing a flow of an electric current is not equipped at high frequency coils. A high frequency heating apparatus(100) comprises a body part and high frequency heating coils(120,122). The body part has a penetration part(114) formed therein. The penetration part passes through the body part along the tube axial direction such that a heating object can be inserted into the penetration part. The high frequency heating coils are installed along an inner peripheral surface of the penetration part. The body part includes an upper body part(110) and a lower body part(112) which are formed by vertically dividing the body part into two parts of upper and lower parts along the tube axial direction. The upper and lower body parts have sliding coupling units formed on ends thereof. The upper and lower body parts are slidingly coupled to or separated from each other by the sliding coupling units.

Description

High Frequency Heating Apparatus

The present invention relates to a welding apparatus for connecting a metal pipe, and more particularly, to a high frequency heating apparatus, which is configured to be separated and coupled as a high frequency heating apparatus using a high frequency electric resistance welding method.

In general, in order to connect the length of the metal tube such as copper tube, stainless steel tube, etc. required by the welding process. High frequency electric resistance welding is a method of the welding process, which uses electromagnetic induction to induce high frequency magnetic field by flowing high frequency current of 300 ~ 1000kHZ (Hz) to the coil to induce the object in the high frequency magnetic field. The electric current is flowed and heated and welded using Joule heat generated accordingly.

Such high frequency electric resistance welding is concentrated on the cross section where resistance heat is welded due to skin effect and proximity effect generated by using high frequency, so the heat affected zone is small and the welding speed can be increased. The productivity is much higher than the welding process.

Hereinafter, a conventional high frequency heating apparatus using the high frequency electric resistance welding will be described.

1 is a schematic diagram of a high frequency heating apparatus 10 according to the prior art. Conventional high frequency heating device 10 is coupled to the hinge (5) of the two coils (1) provided in a hemispherical shape as shown, the hemispherical coil (1) is rotated open and close to the center around the hinge (5) It is configured to be. In addition, a locking device 4 for fixing the hemispherical coils 1 to the end of the hemispherical coil 1 is configured.

Since the conventional high frequency heating device 10 has a hinge 5 and a locking device 4 in the coil 1, there is a problem in that current does not flow smoothly due to resistance by contact connection.

In addition, since the coil 1 is directly exposed to the outside, a part of heat generated from the object to be heated may be lost to the surrounding air, thereby causing a loss of welding efficiency.

In addition, since the locking device 4 and the handle 2 are directly attached to the coil 1, in order to weld another pipe, it is necessary to wait until the heated coil 1 cools before replacing the pipe or the worker wearing a heat-resistant gloves. There is a problem that should be removed after wearing the coil.

In addition, the conventional high frequency heating device 10 is difficult to fasten the parts of the tube to be welded to the heating device accurately and stably, which is difficult for beginners to use.

In addition, since the worker is directly exposed to the high frequency generated by the high frequency coil 1, there is a fear that the health of the worker.

The present invention is to solve the above-mentioned problems, the present invention is to provide a high frequency heating device that allows the current to flow smoothly without resistance in the high frequency heating coil in the high frequency heating device.

Another object of the present invention is to easily and stably fasten the object to be welded to the heating device irrespective of the working environment, and to quickly replace the object to be welded whenever necessary in the high frequency heating device to increase the productivity of the welding process. It is to provide a high frequency heating device that can be.

Another object of the present invention is to prevent the heat generated from the heating object to escape to the surrounding air to increase the thermal efficiency, high frequency heating that can prevent the operator directly exposed to high frequency to ensure the safety of the operator To provide a device.

In order to achieve the above object, the present invention includes a body portion formed with a penetrating portion penetrating therein along the direction of the tube so that the heating object can be fitted;
It comprises a high frequency heating coil installed along the inner circumferential surface of the through portion, wherein the body portion is divided into an upper body portion and a lower body portion divided into two upper and lower portions along the tube axis direction, the upper body portion and the lower portion The end of the body portion is characterized in that the sliding coupling means for sliding coupling or separating the upper body portion and the lower body portion is provided.

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And the high frequency heating device of the present invention is characterized in that it further comprises a fixing device for adjusting the position of the object to be heated in the through so as to position the object to be heated in the coil center.

Here, the fixing device is provided at both ends of the upper body portion and the lower body portion in the direction of the tube axis, and is provided at the ends of the control unit and the control unit which is movable up and down, and is in close contact with the outer circumferential surface of the object to be heated. Characterized in that consisting of a fixing portion for fixing.

And the inner peripheral surface of the body portion forming the cylindrical through portion is characterized in that it comprises a heat insulating material.

The high frequency heating coil is spaced apart from the inner circumferential surface of the through part by a predetermined interval.

According to the high frequency heating apparatus according to the present invention, the following effects can be expected.

First, since the high-frequency coil is not provided with a resistance element that prevents the flow of current, the current flows smoothly, thereby improving the welding efficiency of the high-frequency heating apparatus according to the present invention.

Second, the high frequency heating device is separated, so that the object to be welded can be easily and stably positioned on the high frequency heating device, and the high frequency heating device is provided with a fixing device, so that it is always stable and fast regardless of the working conditions of the operator. In this way, it is possible to secure an accurate welding position of the metal tube, which can greatly improve the convenience and productivity of the work, and obtain a uniform welding state.

Third, by providing a heating space and an insulation material that insulates the surroundings so that heat generated from the heating target object does not escape to the surroundings, the thermal efficiency of the high frequency heating coil can be improved and the heating target object can be replaced at any time. It also has the effect of increasing productivity.

Fourth, by configuring the high-frequency heating coil inside the body of the high-frequency heating device can also prevent the operator from being directly exposed to the high frequency.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the preferred embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the preferred embodiments disclosed below, but can be implemented in various forms, and only the present preferred embodiments make the disclosure of the present invention complete, and are common in the art to which the present invention pertains. It is provided to inform those skilled in the art to the fullest extent of the invention and the invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

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

Figure 2 is a front view of the high frequency heating device according to a preferred embodiment of the present invention, Figure 3 is a side view of the high frequency heating device, Figure 4 is a reference diagram showing the upper and lower body portion of the high frequency heating device is separated, 5 is a reference diagram showing how the high frequency heating device is slidingly coupled.

As shown in Figure 2 to 4, the high frequency heating device 100 according to the present embodiment is large body consisting of the upper body portion 110 and the lower body portion 112, and the upper body portion 110 And high frequency heating coils 120 and 122 respectively provided inside the lower body part 112 and fixing devices provided at both ends along the axial direction of the upper body part 110 and the lower body part 112, respectively. It consists of 160.

Looking at each of the components of the high-frequency heating device 100 configured as described above in detail as follows.

First, as shown in FIGS. 2 and 3, the body portion has a cylindrical hexahedron shape as a whole and has a cylindrical through portion 114 along the tube axis direction so that the tube 200, which is an object to be welded, is located at the center of the body. Formed. As shown in FIG. 4, the body part is separated into two parts, the upper body part 110 and the lower body part 112 so as to easily position the pipe 200, which is a welding target object, in the penetrating part. . That is, the upper body portion 110 and the lower body portion 112 has a rectangular parallelepiped shape and a semi-cylindrical through portion 114 is formed inward, and the upper body portion 110 and the lower body portion 112 are formed. When is combined is to form a cylindrical through portion 114 is formed in the center in the rectangular shape as mentioned above.

As such, the upper body portion 110 and the lower body portion 112, which are separated into two upper and lower portions, are respectively coupled or separated through the coupling means, which will be described in more detail later.

The high body heating coils 120 and 122 are provided inside the upper body unit 110 and the lower body unit 112, respectively. 110 and through the end of the side wall of the lower body portion 112 and inserted into the through portion 114 and then through the inner circumferential surface of the body portion forming the through portion 114 and through the opposite end of the passed body side wall. After it is configured to protrude to the outside. At this time, the high frequency heating coil (120, 122) is preferably installed in a state spaced apart from the inner peripheral surface of the body by a predetermined interval. The high frequency heating is irrelevant even when the joint member is provided to surround the tubes 200 or protrude out of the tubes when a joint member (not shown) is used to interconnect the tubes 200. This is to allow the device 100 to be positioned.

Hereinafter, the coupling means mentioned above will be described in detail. The coupling means may be a sliding coupling means or a hinge.

The sliding coupling means is composed of a sliding coupling groove and a sliding coupling protrusion. In the high frequency heating device 100 according to the present embodiment, the sliding coupling grooves are formed at the sidewall end portions of the upper body portion 110 and the lower body portion 112. By forming the 130, 132, 134, 136, the upper portion of the sliding coupling grooves (130, 132, 134, 136) naturally can be configured to form a sliding coupling projection.

The sliding coupling grooves 130, 132, 134, and 136 may be formed in various forms along the longitudinal direction at the ends of the upper body portion 110 and the lower body portion 112.

However, preferably, as shown in FIG. 4, a sliding coupling groove 130 is formed at one side of the upper body portion 110 and a sliding coupling groove 132 is formed at the inner side of the upper body portion 110, and the lower body portion 112 is formed. On one side of the sliding coupling groove 134 is formed on the inner side and the sliding coupling groove 136 is formed on the other side.

This is to install the high frequency heating coil (120, 122) in a form surrounding the entire through-114. That is, when looking through the lower body portion 112 shown in Figure 4 is inserted into the high frequency heating coil 122 and protrudes the sliding coupling groove 134 is formed inside the high frequency heating coil 122 Should be inserted or protruded to avoid this portion, but the other side is formed with the sliding coupling groove 136 on the outside, even if the sliding coupling groove 136 is formed can be wrapped up to the end of the through portion 114.

Therefore, when the upper body portion 110 and the lower body portion 112 are configured as described above, the high frequency heating coils 120 and 122 may wrap the through portion 114 as a whole and thereby through the through portion ( 114) It is possible to increase the efficiency of high frequency magnetic field generation within.

In addition to the sliding coupling method as described above, the upper body portion 110 and the lower body portion 112 may be coupled through a hinge (not shown) according to a user's selection.

That is, by coupling the one end of the upper body portion 110 and the lower body portion 112, respectively, the upper body portion 110 or lower body portion 112 is configured to be rotated about the hinge axis, The other end can be configured to lock (not shown) so as not to move during welding.

Thus, unlike the configuration of the hinge and the locking device to the high frequency heating coil in the prior art, since the configuration of the hinge and the locking device in the body portion, the current can flow smoothly without resistance.

Coupling means can be freely implemented according to the user's choice in addition to the sliding coupling means and the hinge as described above.

The upper body part 110 and the lower body part 112 are provided with heat insulators 150 and 152 such that the heated heat is not discharged outward or heat is transferred to the outside of the upper body part 110 or the lower body part 112. Make up. To this end, a groove is formed at a predetermined depth in the entire inner circumferential surface forming the through part 114 in the upper body part 110 or the lower body part 112 or in a portion where the high frequency heating coils 120 and 122 are provided. The grooves may be provided with heat insulating materials 150 and 152.

The heat insulators 150 and 152 may be made of various materials applicable to high temperature, which can be freely selected by the user according to the working environment.

And both ends of the upper body portion 110 and the lower body portion 112 is provided with a fixing device 160 for adjusting the position of the pipe 200, which is a welding target object located in the through portion 114, respectively. have.

The fixing device 160 may be implemented by various various means, but as shown in detail in FIG. 6, the upper and lower movable control parts 164 and the lower ends of the control parts 164 are provided and It is composed of a fixing part 166 in close contact with the outer circumferential surface of the object to be heated to fix the tube 200. The fixing device 160 is provided at the support part 168 which is formed at both ends of the upper body part 110 or the lower body part 112 to support the adjusting part 164.

The adjusting unit 164 of the fixing device 160 is configured in the form of a bolt 164 that is screwed to the support 168 to move up and down to support the pipe 200 mechanically simple and stable operation. It is desirable to be. And the fixing unit 164 preferably has a curvature similar to the curvature of the tube 200 to support the tube 200 stably.

In addition, the fixing part 164 is adjusted to prevent damage to the tube 200 by distributing the pressure to press the tube more widely when the control unit 164 is in close contact with the outer peripheral surface of the tube 200 It is preferable to have an area larger than the diameter area of the portion 164.

In addition, the upper end of the adjusting unit 164 may be fastened to the nut 162 for the user's convenience. In this case, heat transfer can be minimized by forming the fixing part 166 made of the same kind of material as the heat insulators 150 and 152.

However, depending on the user's choice, the end surface of the adjusting unit 164 may be processed to have a curvature of the tube 200 and used without the fixing unit 166. In this manner, the tube 200 is rotated in the high frequency heating coil while rotating the control unit 164 provided at both ends of the upper body 110 and the lower body 112 in a clockwise or counterclockwise direction. 120, 122 may be located in the center or the operator's desired position.

The upper and lower surfaces of the upper body 110 and the lower body 112 are provided with a handle 170 so that the user can easily hold and use the upper body 110 and the lower body 112. It is desirable to give.

Looking at the operation of the high-frequency heating device 100 according to the present invention configured as described above are as follows.

First, the tube 200 to be heated is placed in the penetrating portion 114 of the high frequency heating device 100. At this time, the upper body portion 110 and the lower body portion 112 of the high frequency heating device 100 is completely separated and positioned.

When the pipe 200 is located at a desired position of the high frequency heating device 100, the upper body part 110 and the lower body part 112 are coupled to the sliding body, and then the fixing device 160 is adjusted to adjust the pipe ( 200 is positioned at the center of the high frequency heating coil (120, 122). When the operation is completed, a high frequency oscillator (not shown) generates a high frequency and sends it to a control box (not shown), where it is adjusted to a desired frequency and sent to a high frequency coil (120, 122).

As such, the frequency sent to the high frequency coils 120 and 122 generates a high frequency magnetic field so that an induced current flows in the tube 200 in the high frequency magnetic field, and the tube 200 is heated by Joule heat generated accordingly. Are welded.

After the heating welding operation is completed, the fixing device 160 is released and the upper body part 110 is separated by sliding, and then the welded pipe 200 is removed from the high frequency heating device 100 to complete the work. can do.

Here, the high frequency heating device 100 is insulated and a separate handle 170 is attached so that the user can easily separate the high frequency heating device 100 without being affected by heat, and then weld the pipe 200. Can be pulled out and a new welding process performed again.

As described above, when welding copper pipes and copper pipe connecting devices widely used in air-conditioning devices and pipes in the field of refrigeration and air conditioning using welding rods and torches at the work site, productivity and workability may be deteriorated. When using a high frequency heating device, the coil body can be moved and separated, and the copper tube can be easily adjusted by using a fixing device so that the copper pipe is located at the center of the coil. Therefore, a stable and uniform welding state is always maintained regardless of working conditions such as skill level. It can be secured quickly and can greatly improve the convenience and productivity of the work.

Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art to which the present invention pertains can implement the present invention in other specific forms without changing the technical spirit or essential features, The embodiments are to be understood in all respects as illustrative and not restrictive.

That is, in the present embodiment, the case where the high-frequency heating device body is separated up and down has been described, but may be implemented as an integrated type or left and right separation type according to the user's selection.

Therefore, the scope of the present invention is defined by the appended claims rather than the foregoing description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. Should be interpreted.

1 is a schematic diagram of a high-frequency heating device according to the prior art

2 is a front view of a detachable high frequency heating device for copper pipe welding according to a preferred embodiment of the present invention.

3 is a perspective view of the high frequency heating device of FIG.

Figure 4 is a perspective view showing a state in which the body portion of the high frequency heating device of Figure 2 separated

Figure 5 is a side view showing a state in which the body portion of the high frequency heating device of Figure 2 coupled

6 is an enlarged view showing an enlarged portion of a fixing device of the high frequency heating device of FIG.

<Description of the symbols for the main parts of the drawings>

100: high frequency heating device 110: upper body portion

112: lower body portion 120, 122: high frequency heating coil

130, 136: sliding coupling guide groove 132, 134: sliding coupling projection 160: fixing device 200: pipe

Claims (8)

A body portion having a through portion formed therein so as to be fitted with a heating object to penetrate along the tube axis direction; It is configured to include a high frequency heating coil installed along the inner circumferential surface of the through, The body portion is divided into an upper body portion and a lower body portion divided into upper and lower portions along the tube axis direction, and the upper body portion and the lower body portion at the ends of the upper body portion and the lower body portion to the sliding coupling or separation High frequency heating device characterized in that the sliding coupling means is provided. delete delete delete The method of claim 1, And a fixing device for adjusting the position of the object to be heated in the through part so that the object to be heated is located at the center of the high frequency heating coil. The method of claim 5, wherein The fixing device includes a support part installed at both ends of the upper body part and the lower body part in the axial direction, a control part installed to be movable up and down in the support part, and installed at the end of the control part of the object to be heated. The high frequency heating device, characterized in that consisting of a fixing portion for fixing the object to be heated while being in close contact with the outer surface. The method of claim 1, The inner circumferential surface of the body portion forming the cylindrical through portion is characterized in that it comprises a heat insulating material. The method of claim 1, The high frequency heating coil is installed at a predetermined interval spaced apart from the inner peripheral surface of the penetrating portion.

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