JPH0763757B2 - Double bundle tube and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The disclosed technology is a pipe in which a large number of small-diameter pipes used for a heat exchange device or the like are installed in a tightly fixed manner in an outer pipe. Belongs to the technical field of.

<Summary of Summary> Therefore, the invention of this application is a compound in which a plurality of set small-diameter tube groups made of aluminum or the like are fixedly joined to each other and are generally tightly connected in the outer tube. The present invention relates to a bundle tube and a method for manufacturing the same, and in particular, the small-diameter tube group is fixed to each other through a filler such as a brazing filler metal and tightened to a large-diameter outer tube such as carbon steel. The present invention relates to a double bundle tube that is internally installed in a state and a manufacturing method for tightening the double bundle tube in the outer tube in a tightly bound state by a ring thermal reduction method for the outer tube.

<Prior Art> As is well known, pipes are used in all industries, not only for primary fluid transportation but also for strength members such as beam materials of structures and device frames and information transmission means recently. Alternatively, it has come to be used as a surrounding material.

Therefore, since pipes have come to be used for these various uses and these combined uses, the structure is not only simple straight pipes, but also pipe middle pipes, cross pipes and double pipes. Complex structures such as are required, and there are increasing demands for controlling various functions.

For example, in a heat exchange device or the like, a bundled tube in which a plurality of set thin tubes are tightly bundled, or a bundled tube made up of a large number of small tubes such as a cable surrounding tube is used to protect an outer tube having a predetermined strength. It has been strongly demanded that a double-bundle tube such as one bundled in the tube be manufactured in a state in which it fulfills its full function, but not only for each small-diameter tube, but also for tightening in the outer tube. The double bundle tube holding the small diameter tube in the state has not appeared so far, and its appearance is strongly desired.

<Problems to be solved by the invention> Thus, as described above, these double bundle tubes need to be tightly and tightly connected to each other in a large-diameter outer tube which also serves as a strength member, and While each small-diameter pipe functions independently, it must be ensured that there is no mutual displacement, leakage, rust, etc. during the operating state over time. There is a drawback that the technology that satisfies the requirements in the inside has not been developed and brakes a large potential demand.

<Object of the Invention> The object of the invention of the present application is to provide a plurality of thin pipes having a predetermined strength and pressure resistance based on the above-mentioned prior art in a tightly packed state with each other and tightly bundled together. Bundle tube and
The technical problem to be solved is to solve the problem of the manufacturing, and while maintaining the independence of the small-diameter pipes, they are securely tightened by the outer pipe during manufacturing, and neither slips nor leaks occur during operation, To provide an excellent double-bundle pipe and a manufacturing method thereof, which can prevent rust and abrasion from occurring and can be formed into a desired long length, which is useful in the field of piping technology application in various industries. To do.

<Means and Actions for Solving the Problem> In order to solve the above-mentioned problems, the configuration of the invention of the present application, which is based on the above-mentioned object, has the predetermined number of small diameters set in advance to solve the above-mentioned problems. The pipes are bundled in a circular cross section through a filler such as a brazing filler metal, and then they are relatively overlaid inside the outer pipe made of carbon steel or the like, and then relatively overlaid through the filler such as the brazing filler metal, and the high frequency is applied to the outer pipe. An annular heating device such as an induction heating device is set, and an annular cooling device such as a tap water shower ring device is set before and after the annular heating device, and both annular heating devices and the annular cooling device are set at a predetermined speed along the axial direction of the outer pipe. The outer tube tries to expand due to annular heating by relative movement with, but is restricted by the annular cooling of the rear part, and the expansion is blocked,
It is plastically deformed by the annular heating due to strength reduction, yields, is reduced in diameter and is tightly bound, and each thin tube is tightened to make each thin tube and the thin tube for the outer tube in operation. Prevents mutual behavior of diameter pipes, prevents leaks and rust,
Further, the filler such as the brazing filler metal is melted by the annular heating and then condensed by the annular cooling to tightly fix the small-diameter pipe to the outer pipe and the small-diameter pipes to each other so that good heat conduction can be achieved. The small-diameter tube is provided with a technical means for exerting a desired function by allowing a fluid of a predetermined temperature to flow through or inserting a cable or a lead wire.

<Example> Next, an example of the invention of this application will be described with reference to the drawings.

First, the embodiment of the basic embodiment is shown in the drawings starting from FIG. 5, and in the invention of this application, the inner pipe material 2 is laminated relative to the outer pipe material 1 in a predetermined manner, as shown in FIG. 3, an annular heating device 4 such as a high-frequency induction heating device is set at a predetermined portion of the outer pipe material 1 as shown in FIG. Is set and is moved relative to the raw tube 3 in the direction of the arrow at a predetermined speed as shown in FIG. 6, thereby giving annular heating and annular cooling before and after the outer tube 1 to the annular heating application site. If the outer tube material 1 is a free end, it will try to expand outward, but since it is restrained by the front and rear annular cooling devices 5, 5, the expansion is blocked, and the annular heating causes a decrease in strength. And plastically deforms, as shown in Fig. Finally cement F acts to breakdown, is pressed against the inner tube 2 and outer tube member 1 is reduced in diameter by Tightened, the clamping state is to appear.

Thus, since the annular heating device 4 and the annular cooling devices 5 and 5 relatively move in the axial direction of the outer pipe material 1, as a result, the tight connection appears over the entire area of the raw pipe 3 and the tightly tightened state. Is obtained.

In this way, as shown in FIG. 7, the tight fitting tube 6 is obtained.

An embodiment according to the aspect of the above-mentioned principle embodiment is shown in FIGS. 1 to 4. For example, a plurality of set numbers of small diameter tubes 2 ′, 2 ′ ... hand,
As shown in FIG. 3, a brazing filler metal 7 as a filler is provided between them.
Are packed in a dense state and are bundled so that they are adjacent to each other, and the carbon steel outer tube 1 ′ is relatively overlaid to form a raw tube 3 ′,
In this state, as shown in FIG. 2, an annular heating device 4 such as a high frequency induction heating device is set at a predetermined portion of the outer tube 1 ', and before and after the annular cooling device 5, 5 by a shower ring of tap water. Is set and is moved relative to the outer tube 1 ′ in the axial direction integrally at a predetermined speed, the outer tube 1 ′ whose strength has been reduced by the annular heating like the above-mentioned principle embodiment will be expanded by heating. However, it is constrained at the front and rear parts by annular cooling and plastically deformed, and finally it yields and contracts due to the holding bending moment, and it comes into contact with the outer surfaces of the small diameter pipes 2 ', 2' ... Tighten and tighten.

Therefore, the annular heating device 4 and the annular cooling device 5,
By reciprocating 5 from the starting end to the terminating end of the outer tube 1 ', the outer tube 1'is totally tightened with respect to the small-diameter tube groups 2', 2 ', during which the outer tube 1'is heated by annular heating. , And the brazing filler metal 7 interposed between the small diameter pipes 2 ′, 2 ′ ...
2 '... is firmly fixed to the outer pipe 1'and also tightly fixed to each other in the small diameter pipes 2'. The outer pipe 1'is tightened by the ring heat shrinkage and the brazing material 7 is solidified. Together with the fixation by the outer tube 1'and the small-diameter tubes 2 ', 2', and
The tightly connected state of each of the small-diameter pipes 2 ', 2' ... appears very strongly, and the small-diameter pipes 2 ',
Relative displacement between the 2'and the outer tube 1'does not occur, and no clearance is produced between the 2'and the brazing filler metal 7, and rust and leakage are suppressed.

The double bundle tube 8 thus obtained is firmly fixed to each other by the outer tube 1'and the small diameter tubes 2 ', 2' ... As shown in FIG. Even if the high-temperature liquid a or the low-temperature liquid b is passed through each small-diameter tube 2'and heat exchange is performed, the respective thermal behaviors and deviations do not occur, and the tightly-fixed state is surely maintained and solidified. Since the members 7 are in close contact with each other, the heat conduction is good, and the heat exchange as designed can be achieved.

In addition, even after the wire bundle, the lead wire, or the cable is inserted into each small-diameter tube 2'after the manufacturing of the double bundle tube to perform the information transmission function, these wires or cables may be cut due to the thermal behavior over time. It is possible to maintain its full function at all times without being damaged by bending or causing damage such as rust.

Of course, heat can be exchanged with the fluid outside the outer tube 1'in the double bundle tube.

It should be noted that the embodiment of the invention of this application is not limited to the above-mentioned embodiment, and various embodiments such as the ability to insert and set the inner tube inside the multiple bundle tube group can be adopted. .

Further, as a matter of design change, it is of course possible to twist the small-diameter tube group in a spiral shape, and to use not only a round tube but also a square tube or the like for each small-diameter tube.

And it is applied not only to the double bundle pipe for fluid flow, but also to the protective pipe for transmitting information such as cables and the like, or not only the strength member of the structure or the device but also the heating pipe for the boiler. It is also possible to do so.

<Effects of the Invention> As described above, according to the invention of the present application, in the bundled tube in which a large number of small-diameter tubes used in a heat exchange device or the like are provided inside,
The small-diameter pipe set inside the outer pipe is tightly bound by the outer pipe and is in a tightened state. Moreover, a filler such as a brazing material is attached to the outer pipe and between the small-diameter pipes. Since they are inserted and set densely, the small-diameter pipes can be kept extremely firmly fixed not only to each other but also to the outer pipe as it was at the time of initial manufacturing. , During the operation over time, there is no relative displacement or gap due to vibration or oscillation due to disturbance conditions, and further due to thermal behavior, etc. Therefore, displacement and wear do not occur and the initial function is fully exerted. The excellent effect of being able to do is exhibited.

Also, not only the mechanically fixed state but also the heat conduction is good because it is tightly fixed through the filler material such as brazing material,
Therefore, in heat exchange and the like, extremely efficient heat conduction can be performed, and since the strength member and the packaging material can be maintained in one heat system as a whole, an excellent effect that thermal behavior does not occur is exhibited. .

Also, since a set number of small-diameter pipes can be set in one outer pipe in the double-bundle pipe, by forming each outer pipe and the small-diameter pipe by a progressive feeding operation during manufacturing, An excellent effect is obtained that a double bundle tube in a desired long state can be formed.

[Brief description of drawings]

1 to 4 are explanatory views of an embodiment of the invention of this application,
FIG. 1 is a perspective view showing a cut flow of a double bundle tube, FIG. 2 is a longitudinal sectional view of the same during manufacturing, FIG. 3 is a partial transverse sectional view of the same, and FIG. 5 to 8 are partial cutaway perspective views of the principle embodiment. 2 '... small diameter tube, 1' ... outer tube, 8 ... double bundle tube, 7 ... filling material

Claims (2)

[Claims] 1. A double-bundle tube in which a large number of small-diameter tubes are fixedly attached to each other and wholly bonded by an outer tube, and a filler is interposed between the outer tube and each of the small-diameter tubes. Is fixed and the outer tube is tightened with respect to the small diameter tube bundle. 2. A method for producing a double-bundle tube in which a large number of small-diameter pipes are fixedly attached to each other and are tightly bonded by an outer pipe as a whole, and a predetermined number of a large number of small-diameter pipes are bundled through a filler material. The small-diameter tube bundle is layered relative to the outer tube, and then annular heating and annular cooling before and after the annular heating are applied to the outer tube, and the annular heating and annular cooling are moved relative to the outer tube to form the outer tube. A method for producing a multiple bundle tube, which is characterized in that it is tightly bound to a small diameter tube bundle.