KR20030096170A - device and methode for forming of spiral tube - Google Patents

Abstract

PURPOSE: A method and an apparatus for forming spiral tube for boiler are provided to reduce waste of fuel, thereby improves economic feasibility by forming the spiral tube on the outer circumferential surface of tube using a compound roller, thereby increasing heat efficiency as electric heat coefficient inside the spiral tube is being increased. CONSTITUTION: The method for forming spiral tube comprises a step (S110) of cutting width of raw material supplied with being rolled to a certain area according to size of tube; a step (S120) of forming a tube by welding an end part of the material rolled in the circular shape after rolling the cut material in a circular shape; a step (S130) of cutting the formed tube to a certain length after grinding a welding region of the formed tube and forming the grinded tube in a real circle; a step (S140) of forming a spiral tube by forming a spiral on the outer circumferential surface of the cut tube to a size that is the same as or less than diameter of the cut tube; degreasing step (S150) of removing foreign materials adhered to the outer circumferential surface of the spiral tube; solution treatment step (S160) of equalizing structure in which stress is generated by changing structure when performing welding on the degreased spiral tube; processing step (S170) of levelling the solution treated spiral tube in a straight line and chamfering the leveled spiral tube as long as a length of the spiral tube extended during spiral forming; water pressure measuring step (S180) of sorting the durability measured spiral tubes by measuring durability of the chamfered spiral tubes; vortex probe measuring step (S190) of sorting the spiral tubes by measuring water flown in a swirl shape by the spiral of the spiral tubes after plating the spiral tubes sorted after passing through the water pressure measuring step; and packing step (S200) of indicating specification on the spiral tubes sorted after passing through the vortex probe measuring step (S190), and packing the specification indicated spiral tubes through inspection.

Description

Device and method for forming of spiral tube

The present invention relates to a heat exchanger, and more particularly, to a method and apparatus for forming a spiral tube installed therein so as to quickly supply heated hot water to a kitchen or a bathroom.

In general, the heat exchanger 10 is capable of heating water by heat of burning gas or oil, and supplying the heated water to a bathroom or a sink, as shown in FIG. The exhaust pipe is formed on the outer circumferential surface, and a fuselage 11 having open sides is provided, and the flange 12 having the through hole 12a formed therein at regular intervals on both sides of the fuselage 11 is mounted by welding. After installing the spiral tube 13 in the through hole 12a of the flange 12, the end of the spiral tube 13 is expanded and fixed, and a protective cap having an inlet pipe and an exhaust pipe formed at the end of the flange 12. (14) is in close contact and secured with bolts and nuts.

In addition, the molding of the spiral tube 13 installed in the through-hole 12a of the flange 12 is, as shown in Figure 2, the tube (T) into the interior of the pressure roller 20 is spaced apart by 120 ° ) Is supplied, the pressure roller 20 is rotated to form a spiral in the longitudinal direction of the tube (T), that is, the outer peripheral surface as shown in FIG.

However, in the conventional spiral tube configured as described above, when the pressure roller presses the outer circumferential surface of the tube to form the spiral inner diameter, the spiral outer diameter becomes larger than the outer diameter of the tube, and the spiral tube having the large spiral outer diameter is inserted into the through hole of the flange. After the end is expanded and the flange is fixed to the body by welding, it is inconvenient to use because it cannot find any abnormality in the spiral tube or replace the aged spiral tube during the manufacturing process. And due to the loss of material, there was a problem of lowering the economics by increasing the production cost.

In addition, the smaller the groove contact diameter of the tube is, the larger the outer diameter of the spiral is. Therefore, the spiral groove contact diameter of the tube is inevitably formed. Therefore, the thermal efficiency decreases as the heat transfer coefficient decreases inside the tube. There was a problem of deterioration.

Accordingly, the present invention has been made in view of the above-mentioned conventional defects, and its object is to form a spiral tube using a double roller on the outer circumferential surface of the tube, thereby precisely controlling the depth of the spiral outer diameter and the spiral inner diameter of the spiral tube. It is possible to make the replacement of the through hole of Hurenji and prevent the spiral outer diameter of the spiral tube from becoming larger than the outer diameter of the spiral tube, while reducing the spiral inner diameter of the spiral tube, which increases the heat transfer coefficient inside the spiral tube. According to the present invention to provide a method and apparatus for forming a spiral tube for a boiler for improving the economic efficiency by reducing the waste of fuel by increasing the thermal efficiency.

The molding method of the spiral tube of the present invention for achieving this object,

Cutting the width of the raw material rolled to a predetermined width according to the size of the tube;

Rolling the cut material in a round shape to weld the ends to form a tube;

Polishing the welded portion of the molded tube, and cutting the polished tube into a round shape to cut a predetermined length;

Forming a spiral tube by forming a spiral on an outer circumferential surface with a dimension smaller than or equal to the diameter of the cut tube;

A degreasing step of removing foreign matter attached to an outer circumferential surface of the spiral tube;

A solid solution heat treatment step of leveling the tissue in which the stress is changed by welding the degreased spiral tube;

A straightening of the spiral heat-treated spiral tube in a straight line, and a chamfering process for an increased length during spiral forming;

A hydraulic pressure measuring step of measuring and measuring the durability of the chamfered spiral tube;

A vortex flaw measuring step of plating the selected spiral tube through a hydraulic pressure measurement, and measuring and selecting water flowing in a vortex by the spiral of the spiral tube;

Marking the specifications on the spiral tube selected by passing the vortex flaw measurement, characterized in that consisting of a packaging step of packaging through inspection.

In addition, the molding apparatus of the spiral tube of the present invention,

A first cutting part which cuts the width of the raw material rolled to a predetermined width according to the size of the tube;

A first molding part which forms a tube by welding an end by rolling the material cut at the first cutting part in a round shape;

A second cutting portion for grinding the welded portion of the tube formed in the first molding portion, and forming the polished tube into a round shape and cutting it to a predetermined length;

A second molding part for forming a spiral tube by forming a spiral on an outer circumferential surface of a diameter smaller than or equal to the diameter of the tube cut at the second cutting part;

A degreasing unit for removing foreign substances attached to the outer circumferential surface of the spiral tube formed by the second molding unit;

A solid solution heat treatment part for leveling the tissue in which the stress is changed by welding the spiral tube degreased in the degreasing part;

A processing unit for straightening the spiral tube heat-treated in the solid solution heat treatment unit and chamfering as long as the length of the spiral forming;

A hydraulic pressure measuring unit for measuring and measuring the durability of the spiral tube chamfered in the processing unit;

A vortex flaw measuring unit for plating the selected spiral tube through the hydraulic measurement of the hydraulic pressure measuring unit, and measuring and selecting water flowing in a vortex by the spiral of the spiral tube;

The vortex flaw measuring unit is characterized in that the packaging is configured by displaying the specifications on the spiral tube selected by passing the vortex flaw measurement, and packaging through inspection.

1 is a partial cross-sectional view showing a typical heat exchanger

Figure 2 is a cross-sectional view showing a conventional spiral tube forming apparatus

3 is a front view showing a spiral tube formed by FIG.

Figure 4 is a flow chart showing a method of forming a spiral tube to which the present invention is applied

5 is a schematic view showing an apparatus for forming a spiral tube according to the present invention;

6 is a cross-sectional view showing an apparatus for forming a spiral tube according to the present invention.

7 is a front view of the spiral tube formed by FIG.

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

110: first cutting portion 120: first molding portion

130: second cutting portion 140: second molding portion

150: degreasing unit 160: solid solution heat treatment unit

170: processing unit 180: hydraulic pressure measuring unit

190: eddy current measurement unit 200: packaging unit

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. 4 is a flowchart showing a method for forming a spiral tube to which the present invention is applied, and FIG. 5 is a schematic view showing an apparatus for forming a spiral tube according to the present invention.

Method for forming a spiral tube to which the present invention is applied, the step of cutting the width of the raw material rolled to a predetermined width in accordance with the size of the tube (S110);

Rolling the cut material in a round shape to weld the end to form a tube (S120);

Polishing the welded portion of the formed tube, and cutting the polished tube into a round shape to cut a predetermined length (S130);

Forming a spiral tube by forming a spiral on an outer circumferential surface with a dimension smaller than or equal to the diameter of the cut tube (S140);

Degreasing step (S150) for removing the foreign matter attached to the outer peripheral surface of the spiral tube;

A solid solution heat treatment step (S160) of leveling the tissue in which the stress is changed by welding the degreased spiral tube;

Straightening the spiral heat-treated spiral tube in a straight line, the processing step of chamfering as long as the length of the spiral forming (S170) and;

A hydraulic pressure measuring step (S180) of measuring and selecting the durability of the chamfered spiral tube;

A vortex flaw measurement step (S190) of plating the selected spiral tube through a hydraulic pressure measurement and measuring and selecting water flowing in a vortex by the spiral of the spiral tube;

Marking the specifications on the spiral tube selected by passing the vortex flaw measurement, and consists of a packaging step (S200) for packaging through inspection.

In addition, the apparatus for forming a spiral tube to which the present invention is applied comprises a first cut portion 110 for cutting the width of the raw material rolled to a predetermined width according to the size of the tube, and cut at the first cut portion 110. The first molded part 120 is formed by rolling the material in a round shape to weld the end to form the tube T, and polishes the welded portion of the tube T formed in the first molded part 120. The second cutting portion 130 is formed by molding the polished tube into a round shape and cutting it to a predetermined length, and the spiral is formed on the outer circumferential surface with a dimension smaller than or equal to the diameter of the tube T cut at the second cutting portion 130. The second molding unit 140 is formed to form a spiral tube (S), the degreasing unit 150 for removing the foreign matter adhered to the outer peripheral surface of the spiral tube (S) formed in the second molding unit 140 Is composed.

Meanwhile, a solid solution heat treatment unit 160 configured to level the tissue in which the stress is changed by welding the spiral tube S degreased by the degreasing unit 150 is configured, and the spiral heat-treated in the solid solution heat treatment unit 160 is configured. Straightening the tube (S) in a straight line, the processing unit 170 is configured to chamfer as long as the length of the spiral forming, and to measure and select the durability of the spiral tube (S) chamfered in the processing unit 170 The hydraulic pressure measuring unit 180 is configured, the spiral tube S is plated by passing the hydraulic pressure measurement of the hydraulic pressure measuring unit 180, and the water flowing in the vortex by the spiral of the spiral tube S is measured. The vortex flaw detection unit 190 is selected, and the packing unit 200 displays the specifications on the spiral tube S selected by passing the vortex flaw measurement of the vortex flaw measuring unit 190 and packaged through inspection. ) Is configured, If you explain in more detail as follows.

The second molding part 140 may prevent the outer diameter of the helical from being expanded than the outer circumferential surface of the tube T between the pressing rollers 141 which pressurize the outer peripheral surface of the tube T to form the inner diameter of the spiral. A double roller provided with a support roller 142 for supporting is used.

In addition, by adjusting the interval between the pressing roller 141 and the support roller 142 of the second molding portion 140 may be formed to widen or narrow the width of the inner and outer diameter of the spiral.

In addition, the end of the support roller 142 is formed in a round to surround the protruding portion of the spiral.

Next will be described the molding process of the spiral tube (S) by the present invention configured as described above.

First, the raw material rolled up to a predetermined width is cut at the first cutting portion 110 in a width corresponding to the size (diameter × π) of the tube, and the material cut at the width corresponding to the size of the tube at the first cutting portion 110. Roll to form a tube (T) in the first molding portion 120 by welding the end.

The welded portion of the tube T formed as described above is polished, and the inside of the polished tube T is re-molded so as to form a circle, and then cut at the second cut portion 130 to a predetermined length.

In addition, the pressure roller 141 and the support roller 142 of the second molding part 140 are in close contact with the outer periphery of the tube T cut at the second cutting part 130 as shown in FIG. 6. The second molding part 140 is rotated to form the spiral tube S.

At this time, the end of the pressing roller 141 pressurizes the outer circumferential surface of the tube (T) to form a spiral inner diameter and at the same time the outer diameter of the spiral that moves to the outside by the formation of the spiral inner diameter is a round part inside the support roller 142. It is supported to be formed smaller than the outer diameter of the tube (T) is to extend than the length cut in the second cut portion (130).

Meanwhile, the pressure roller 141 presses the outer circumferential surface such that the spiral inner diameter of the tube T is formed, and the support roller 142 supports the spiral outer diameter that moves to the outside when the spiral inner diameter is formed. Spiral tube (S) can be formed in various forms in a form smaller or larger than the diameter of the tube (T) or narrow or wide in the spiral inner diameter and the outer spiral diameter.

In addition, the spiral tube S formed as described above passes through the degreasing unit 150 to remove foreign substances attached to the inner and outer circumferential surfaces of the spiral tube S, and the solidified heat treatment unit 160 deforms the tissue deformed during welding. Level at

As described above, the spiral tube S heat-treated in the solid solution heat treatment unit 160 is straightened, and the end portion is chamfered from the processing unit 170 by the length that is increased during the spiral molding, thereby forming a predetermined length.

In addition, the durability of the spiral tube (S) chamfered in the processing unit 170 is measured by the hydraulic pressure measuring unit 180, if the measured value is less than the set value is a bad treatment, if the measured value is more than the set value is normal Treatment and screening.

As such, the inner and outer circumferential surfaces of the spiral tube S selected through the hydraulic pressure measuring unit 180 are plated, and the velocity of water flowing in the vortex through the spiral of the spiral tube S in the vortex flaw measuring unit 190 is measured. If the measured value is less than the set value, the defect is processed. If the measured value is more than the set value, normal processing is performed.

The spiral tube (S) selected through the vortex flaw measuring unit 190, the specification is displayed, and after the final inspection, the packaging 200 may be packed.

Meanwhile, since the spiral tube S formed through the second molding part 140 is formed to have a size smaller than or equal to the spiral outer diameter of the tube T, as illustrated in FIG. 7, the flange 12 is formed. Insertion into the through hole (12a) of the can be used to easily replace the aging spiral tube (S).

As described above, the present invention forms a spiral tube using a double roller on the outer circumferential surface of the tube, so that the spiral tube and the spiral inner diameter of the spiral tube can be precisely controlled, and the spiral tube can be manufactured more precisely than the outer diameter of the tube. As the spiral outer diameter of is reduced, the spiral tube can be replaced and installed through the through hole of Hurenji, which makes it easy to work or A / S, thereby reducing production costs and improving economics.

In addition, the present invention, while preventing the spiral outer diameter of the spiral tube to increase, the spiral inner diameter of the spiral tube can be formed less, so that the heat efficiency increases as the heat transfer coefficient inside the spiral tube increases, thereby reducing fuel waste and improving economic efficiency. There is an advantage.

Claims (5)

Cutting the width of the raw material rolled to a predetermined width according to the size of the tube (S110); Rolling the cut material in a round shape to weld the end to form a tube (S120); Polishing the welded portion of the formed tube, and cutting the polished tube into a round shape to cut a predetermined length (S130); Forming a spiral tube by forming a spiral on an outer circumferential surface with a dimension smaller than or equal to the diameter of the cut tube (S140); Degreasing step (S150) for removing the foreign matter attached to the outer peripheral surface of the spiral tube; A solid solution heat treatment step (S160) of leveling the tissue in which the stress is changed by welding the degreased spiral tube; Straightening the spiral heat-treated spiral tube in a straight line, the processing step of chamfering as long as the length of the spiral forming (S170) and; A hydraulic pressure measuring step (S180) of measuring and selecting the durability of the chamfered spiral tube; A vortex flaw measurement step (S190) of plating the selected spiral tube through a hydraulic pressure measurement and measuring and selecting water flowing in a vortex by the spiral of the spiral tube; The method of forming a spiral tube, characterized in that consisting of a packaging step (S200) to display the specifications on the selected spiral tube passed through the vortex flaw measurement, and packaging through inspection. A first cutting part 110 which cuts the width of the raw material rolled to a predetermined width according to the size of the tube; A first molding part (120) for forming a tube (T) by welding an end by rolling the material cut in the first cutting part (110) in a round shape; A second cutout portion 130 that polishes the welded portion of the tube T formed by the first molding portion 120, and cuts the polished tube into a round shape at a predetermined length; A second molding part 140 for forming a spiral tube S by forming a spiral on an outer circumferential surface with a dimension smaller than or equal to the diameter of the tube T cut at the second cutting part 130; A degreasing unit 150 for removing the foreign matter attached to the outer circumferential surface of the spiral tube S formed by the second molding unit 140; A solid solution heat treatment unit 160 for leveling the tissue in which the stress is changed by welding the spiral tube S degreased by the degreasing unit 150; A processing unit 170 for straightening the spiral tube S heat-treated in the solid solution heat treatment unit 160 and chamfering as long as the spiral length is increased; A hydraulic pressure measuring unit 180 for measuring and selecting durability of the spiral tube S chamfered at the processing unit 170; The vortex flaw measuring unit 190 to plate the spiral tube (S) selected by passing the hydraulic pressure measurement of the hydraulic pressure measurement unit 180, and to measure and select the water flowing in a vortex by the spiral of the spiral tube (S) and ; Apparatus for forming a spiral tube, characterized in that the packaging portion 200 is configured to display the specifications on the spiral tube (S) selected by passing the vortex flaw measurement unit 190, the packaging by inspection . The method of claim 2, wherein the second molding part 140, A double type provided with a support roller 142 for supporting the outer diameter of the spiral to prevent the outer diameter of the spiral from expanding than the outer peripheral surface of the tube T between the pressurizing rollers 141 pressurized to form a spiral inner diameter on the outer peripheral surface of the tube T. Apparatus for forming a spiral tube, characterized in that using a roller. The method according to claim 2 or 3, Apparatus for forming a spiral tube, characterized in that to form a wide or narrow width of the inner and outer diameter of the spiral by adjusting the interval between the pressure roller 141 and the support roller 142 of the second molding portion 140 The method of claim 3, Apparatus for forming a spiral tube, characterized in that the end of the support roller 142 is formed in a round to surround the protruding portion of the spiral.