JP2639124B2 - Long heat transfer tube manufacturing equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for manufacturing a long heat transfer tube having a groove and a porous plating layer formed on an inner surface thereof.

[Prior Art] Conventionally, in a heat transfer tube of this type, when a groove is formed in the tube, a method of extruding, drawing, rolling or the like is used. In order to form a porous plating layer in a tube, a linear electrode is passed through the tube.

[Problems to be Solved by the Invention] However, in the above-described conventional heat transfer tube manufacturing technology, in the extrusion method or the drawing method, a groove having a predetermined shape with high accuracy such that heat transfer is improved is provided. Since it is difficult to obtain, and a relatively large pulling force is required in drawing, there is a disadvantage that the metal tube is easily damaged by this and high-speed processing cannot be performed. Further, the rolling method has a drawback that the tool must be rotated, which makes it extremely difficult to process a long product. On the other hand, when a porous plating layer is formed in a tube, there is a problem that it is extremely difficult to perform plating in a long tube because of passing a linear electrode through the tube.

The present invention has been made in view of the above circumstances, and provides an apparatus for manufacturing a long heat transfer tube that can easily manufacture a long heat transfer tube having a groove and porous plating formed on an inner surface thereof. It is intended to be.

Means for Solving the Problems In order to achieve the above object, the present invention provides a groove rolling mill for rolling a groove on one surface of a supplied strip-shaped heat transfer tube material, and the groove rolling mill supplied from the groove rolling mill. A plating tank for applying porous plating to the groove-side surface of the heat tube material, and the heat transfer tube material plated in the plating bath is formed by bending the plated surface inward into a tubular shape to form a joint. And a pipe forming machine for welding.

Further, it is preferable to provide a forming die for forming a cross section of the heat transfer tube material formed by the pipe forming machine into a predetermined shape.

[Action] In the present invention, a groove is formed in a strip-shaped heat transfer tube material by a groove rolling mill, and the heat transfer tube material is supplied to a plating tank, whereby a long and long groove having a groove and a porous plating layer formed thereon is formed. Obtain heat transfer tube material. Then, the heat transfer tube material is formed into a tubular shape by a pipe forming machine to obtain a long heat transfer tube.

In the case where a molding die is provided, a long heat transfer tube having a predetermined cross-sectional shape can be obtained.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

FIG. 1 is a view showing an apparatus for manufacturing a long heat transfer tube, and FIG. 1 (a) shows a rolling / plating apparatus.

In this figure, reference numeral 1 denotes an uncoiler. The uncoiler 1 supplies a strip or strip of soft or semi-hard copper material strip (heat transfer tube material) 2 to a groove rolling mill 3.

The groove rolling machine 3 includes an upper holding roll 4 and a groove rolling roll 5 that rolls a groove while pressing the material strip 2 against the holding roll 4. Each of the rolls 4 and 5 has a multiple roll structure in which a plurality of rolls are provided in a width direction of the material strip (a direction orthogonal to the paper surface), and the lower groove rolling roll 5 is provided as shown in FIG. Is formed. That is, on the outer peripheral surface of the grooved roll 5, three pairs of ridges 5a and 5b are formed, which are linearly extended to the surface, and these ridges 5a and 5b extend. The direction is inclined left and right symmetrically with respect to the axial direction of the grooved roll 5. A partitioning ridge 5c is formed in the circumferential direction at the boundary between the pair of ridges 5a and 5b and the other pair of ridges 5a and 5b. The material strip 2 rolled by the groove rolling rolls 5 has grooves 2a as shown in FIG.

The material strip 2 rolled by the groove rolling mill 3 is continuously fed to the electroplating tank 8 while being tensioned by the tension rollers 6 and 7 in a state where the rolling oil at the time of rolling is adhered. ing.

A copper sulfate plating solution is stored in the electroplating tank 8, and the material strips 2 enter the plating solution from above and exit upward again. On the inlet side and the outlet side of the electroplating tank 8, a first submerged roll 9 and a second submerged roll 10 for keeping the material strip 2 horizontal in the plating solution are provided. The liquid roll 10 also serves as a cathode. Further, in the electroplating tank 8, an anode member 11 having a flat plate 11a disposed in parallel with the lower surface of the material strip 2 maintained horizontally is provided, and a link mechanism is provided above the material strip 2. By moving the material strip 2 in the vertical direction through the upper surface 12 and pressing the upper surface of the material strip 2, the lower surface of the material strip 2 (the surface on which the groove 2a is formed) and the anode member 11
A press plate 13 for adjusting the distance from the flat plate 11a is provided. Further, the electroplating tank 8 sucks the plating solution from the outlet side of the material strip 2 and discharges the plating solution to the inlet side of the material strip 2, whereby the chemical pump circulates the plating solution.
14 are provided.

In the electroplating tank 8, water is electrolyzed by flowing a pulse current such as an intermittent current between the anode and the cathode, and oxygen gas is generated on the flat plate 11a of the anode. The deposited metal adheres to the rolling oil on the lower surface of the material strip 2 and grows in such a manner as to enclose the oxygen gas bubbles. Therefore, a porous plating layer 15 is formed on the lower surface of the material strip 2 as shown in FIG.

A slitter 16 is provided on the outlet side of the material strip 2 of the electroplating tank 8, and the material strip 2 cut by the slitter 16 is wound by a coiler 17. The slitter 16 is provided with a ridge 5c of the groove rolling roll 5.
It is arranged so as to cut a groove extending in the longitudinal direction, and the coiler 17 is driven by an electric motor.

Thus, the material strip 2 once wound on the coiler 17 is formed into a pipe shape by the pipe forming apparatus shown in FIG. 1 (b).

That is, the material strip 2 wound up by the coiler 17 is pulled out through the tension rolls 18 and 19 with the porous plating layer 15 facing upward, and is formed into a cylindrical shape by the roll forming device 20. High frequency welding machine 21 at seam
Is to be welded. As a result, the material strip 2 becomes a heat transfer tube 22 having the groove 2a and the porous plating layer 15 on the inner surface, as shown in FIG. Further, by the roll forming device 20 and the high-frequency welding machine 21,
A pipe forming machine 23 is configured.

The heat transfer tube 22 formed by the pipe forming machine 23 has welding distortion and the like corrected by a forming roll 24, and further formed by a forming die.
With 25, a predetermined sectional shape is formed.

That is, as shown in FIGS. 6 (a) and 6 (b), the forming die 25 can form the heat transfer tube 22 having a circular or oval cross-sectional shape according to the use of the heat transfer tube 22. I have.

In this way, the heat transfer tube formed into a predetermined cross-sectional shape
22 is wound and stored in a basket 27 while being bent by a bending roll 26.

The heat transfer tube 22 stored in this way is shown in FIG.
As shown in the figure, the belt is pulled out from the basket 23, curved by another bending roll 28, formed into a level wind coil 30 by a level wind coiler 29, and is brightly annealed in this state before being shipped. It has become.

The heat transfer tube 22 formed as described above is used, for example, in a fin coil heat exchanger shown in FIG. 7 or a serpentine heat exchanger shown in FIG. You. However, in these figures,
What is indicated by 31 is a fin for heat dissipation.

In the heat transfer tube manufacturing apparatus configured as described above, after the groove 2a is formed in the strip-shaped material strip 2, the surface on which the groove 2a is formed is continuously subjected to porous plating. The long material strip 2 on which the 2a and the porous plating layer 15 are formed is obtained. Then, the heat transfer tube 22 is continuously formed from the material strip 2 by the pipe forming machine 23.

Therefore, in the heat transfer tube manufacturing apparatus configured as described above, a long heat transfer tube 22 in which the groove 2a and the porous plating layer 15 are formed can be manufactured. In addition, since the grooves 2a are formed in the material strips 2 supplied in the form of a strip, the grooves 2a having a large number of strips that cannot be obtained by rolling can be formed. Further, a pair of ridges 5
a, 5b are formed, and the extending direction of these ridges 5a, 5b is symmetrical with respect to the axis of the groove rolling roller 5, so that the material strip 2 is formed into a specific shape by rolling the groove 2a. No deformation in the direction. Although it is difficult to uniformly form the porous plating layer 15 in a tube having an oval cross section, since the plated material strip 2 is formed in a pipe shape,
It is possible to easily form a deformed pipe such as an ellipse in which the porous plating layer 15 is uniformly formed on the inner surface. In addition, since the heat transfer tube having the irregular cross section can be easily manufactured, a heat transfer tube having a cross sectional shape that can effectively use the inner area of the tube can be designed according to the heat exchanger or the like.

In the above embodiment, the step of forming the groove 2a and the porous plating layer 15 in the material strip 2, the step of forming the heat transfer tube 22 from the material strip 2, and the step of forming the heat transfer tube 22 in the level wind coil 30 Although the apparatus is arranged separately from the step of performing the
It goes without saying that the apparatus may be arranged so as to be continuously performed up to the molding of 30.

[Effects of the Invention] As described above, according to the present invention, it is possible to continuously perform porous plating while rolling a groove on a belt-shaped heat transfer tube material, so that a groove and a porous plating layer are formed. A long strip-shaped heat transfer tube material can be obtained. Therefore, by forming this heat transfer tube material into a cylindrical shape and welding it, a remarkable effect is obtained that a long heat transfer tube having a groove and porous plating on the inner surface can be obtained.

Further, when the molding die is provided, there is a remarkable effect that a long heat transfer tube formed in a predetermined sectional shape can be obtained.

[Brief description of the drawings]

1 to 6 are views showing one embodiment of the present invention, and FIG. 1 (a) is a view showing a configuration of a rolling / plating apparatus,
FIG. 1 (b) is a view showing a configuration of a pipe forming apparatus, FIG. 1 (c) is a view showing an apparatus for forming a level wind coil, FIG. 2 is a plan view showing a groove rolling roll, and FIG. FIG. 4 is a cross-sectional view of the material strip after forming the groove by the groove rolling mill, FIG. 4 is a cross-sectional view of the material strip after porous plating, FIG. 6 (a) is a diagram showing an example of a cross section of a formed heat transfer tube, FIG. 6 (b) is a diagram showing an example of a cross section of another heat transfer tube, and FIGS. 7 to 8 are uses of the heat transfer tube. FIG. 7 is a perspective view showing a fin coil heat exchanger, and FIG. 8 is a perspective view showing a serpentine heat exchanger. 2 ... material strip (heat transfer tube material), 3 ... groove rolling machine, 8 ... electroplating tank, 15 ... porous plating layer, 22 ... heat transfer tube, 23 ... pipe forming machine.

Claims (2)

(57) [Claims] 1. A groove rolling mill for rolling grooves on one surface of a strip-shaped heat transfer tube material to be supplied, and a plating tank for performing porous plating on a groove-side surface of the heat transfer tube material supplied from the groove rolling machine. And a pipe forming machine for welding the seam while bending the plated surface of the heat transfer tube material plated in the plating tank inward to form a tubular shape. Manufacturing equipment for shaku heat transfer tubes. 2. A groove rolling mill for rolling grooves on one surface of a supplied belt-shaped heat transfer tube material, and a plating tank for applying a porous plating to a groove-side surface of the heat transfer tube material supplied from the groove roll mill. And a pipe forming machine for welding the joint while bending the plated surface of the heat transfer tube material plated in the plating tank inward to form a tubular shape, and a pipe forming machine formed by the pipe forming machine. A forming die for forming a cross section of the heat transfer tube material into a predetermined shape.