JPH0671633B2 - Method and apparatus for manufacturing multi-turn metal spiral wound tube - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a multi-turn metal spiral wound tube.

(Prior Art) Conventionally, various methods have been proposed for manufacturing a metal spiral wound tube (for example, Japanese Patent Publication No. 38-18965, Patent No.
No. 140878, JP-A-53-110160, and JP-B-63-129), both relate to the production of a single-layer spiral wound tube. Not proposed.

When used in a heat exchanger, it is possible to improve heat exchange efficiency by configuring the spirally wound tube in multiple layers of two or three layers, but winding a large diameter spiral tube onto a small diameter spiral tube. If it is attempted to manufacture by turning, there is a problem that the winding work is difficult, the whole is deformed, and the whole is difficult to tightly wind.

(Problems to be Solved by the Invention) Therefore, the present inventor inserts a small-diameter spiral winding tube into a large-diameter spiral winding tube to form a multi-winding spiral winding tube in two or three layers, It is considered that the drawbacks of the method for manufacturing a multi-winding tube can be eliminated, and an object of the present invention is to provide a spiral winding tube capable of interposing and forming a plurality of multi-winding tubes, and to provide a method and an apparatus for easily assembling the spiral winding tube. To do.

(Means for Solving the Problem) The present invention comprises a spiral winding step and an interposing and assembling step, and the spiral winding portion 21 and the end portions 22 and 23 extending from the spiral winding portion so as to project in the tangential direction thereof extend from the spiral winding portion. A small diameter first metal spiral wound tube 2 which ends in the same direction in a diagonal position across the part,
The spiral winding portion 31 and the end portions 32, 33 projecting and extending in the tangential direction from the spiral winding portion sandwich the spiral winding portion, and the large-diameter second metal spiral winding portion 3 ends in the same direction diagonally. In the spiral winding step, (a) a freezing liquid is injected into the straight metal pipe 5 to close both ends, and the freezing liquid is filled to fill an internal void, One end 51 of the filled metal straight pipe has a spiral winding roller 6 having an outer diameter corresponding to the inner diameter of the spiral winding pipe.
Or, it is locked to the outer circumference of 6 ', while the locking position of the roller
The straight metal tube 5 extending in the tangential direction from 61 is brought into contact with the contact member 9 extending in parallel to the roller at a constant interval, and the roller is rotated in a predetermined direction so that the liquid frozen body in the tube causes A metal straight pipe is wound in a spiral state on the outer circumference of the roller 6 or 6'while counteracting the pipe flattening force at the time of winding.
Small-diameter first metal spiral wound tube 2 in which spiral winding portion 21 and end portions 22 and 23 projecting from and extending in the tangential direction from the spiral winding portion end in the same direction diagonally across the spiral winding portion.
And a large diameter second metal spiral winding tube in which the spiral winding portion 31 and the end portions 32 and 33 projecting from the spiral winding portion and extending in the tangential direction thereof end in the same direction diagonally across the spiral winding portion. 3 is manufactured, and in the insertion and assembling step, (b) the small-diameter first spirally wound tube 2 manufactured in the spirally winding step is replaced by a similar-shaped large-diameter second tube having an inner diameter corresponding to the outer diameter thereof. In inserting the spiral wound tube 3 into the spiral wound tube having two or more layers, one end 22 of the spiral wound tube 2 having a small diameter is passed through the inside of the spiral wound portion 31 of the spiral wound tube 3 having a large diameter to the other side. The inner diameter 21a of the small-diameter spiral winding portion 21 and the outermost portion 31a of the large-diameter spiral winding portion 31 which are combined with each other, thereby slightly enlarging the inner diameter of the large-diameter spiral winding portion 31. , The outer diameter of the small-diameter spiral winding part 21 is slightly reduced, and the small-diameter spiral winding part 21 is inward. Pushing one wheel, After at least pushing the number of turns of the half of the spiral wound portion 21 consists interpolating the small-diameter spiral winding portion 21 in a spiral wound portion 31 of larger diameter strikes the outside.

The spiral winding process is performed by the following device. That is, one end 51 of the metal straight pipe 5 is locked on the outer circumference, and the metal straight pipe 5 extending tangentially from the locking position of the roller is provided with an engaging portion 61 for vibrating in the spiral traveling direction. A spiral winding roller 6 having an outer diameter corresponding to the inner diameter of the winding tube, a support frame 7 for axially supporting the roller 7, a driving means 8 for decelerating and driving the roller via the support frame 7, and a roller. On the other hand, the abdomen of the metal straight pipe which extends in parallel at a constant interval and is wound on the roller by contacting the abdomen 52 of the metal straight pipe 5 having the one end locked at a constant interval from the end 51 thereof. Is a spiral winding device including a contact member 9 for supporting and supporting.

On the other hand, the above-mentioned interpolating and assembling step (b) is carried out by the following device. That is, the spiral winding portion 21 manufactured by the spiral winding device and the end portions 22 and 23 extending in a tangential direction from the spiral winding portion and extending in the tangential direction end in the diagonal direction across the spiral winding portion 21 in the same direction. A device for inserting a spiral winding tube 2 of small diameter and a spiral winding tube 3 of similar shape having an inner diameter corresponding to the outer diameter thereof, in which one end 22 of the spiral winding tube 2 of small diameter is large. Engaging the inner part 21a of the small-diameter spiral winding part and the outermost part 31a of the large-diameter spiral winding part, which are combined so as to project from the other side through the inside of the spiral winding part 31 of the spiral winding tube 3 A pair of opposed pressing members 100, 100 to be sandwiched, and a vise mechanism 110 for reducing or expanding the interval between the pressing members.
And a vise driving mechanism 1 for driving the vise mechanism 110 with an electric motor
By slowly operating the pressing members 100, 100 via the vise mechanism 110, the inner diameter of the combined large-diameter spiral winding portion 3 is slightly increased, while the small-diameter spiral winding portion 2 is provided. The inner diameter of the spiral winding part 21 with a small diameter
This is an insertion device for a spirally wound tube configured such that one half of the number of turns of the spiral winding part 21 can be pushed in by pushing one wheel at a time from a.

In this method, water can be usually used as the freeze-capable liquid, but an additive may be mixed with water in order to increase the heat capacity and maintain the coagulated form during the operation. Preparation is performed by filling a metal straight pipe with this type of liquid, closing both ends with rubber stoppers, and freezing in a freezer.

(Operation) According to the present method, the end portion projecting and extending in the tangential direction from the spiral winding portion manufactured in the above-mentioned spiral winding step ends in the same direction at the diagonal position across the spiral winding portion. Since a spiral wound tube having a small diameter is used, a spiral wound tube can be easily manufactured. When manufacturing a multiple wound spiral tube as shown in FIG. Even if it is not wound in triple, it is possible to assemble it by forming the outer diameter of the small diameter spirally wound tube separately so as to correspond to the inner diameter of the large diameter spirally wound tube and assembling the circle of wisdom.

That is, according to the present invention, one end of the small-diameter spiral winding tube is projected from the other side through the inside of the spiral winding portion of the large-diameter spiral winding tube, and the combined small-diameter spiral winding portion and the large-diameter spiral winding tube are combined. By sandwiching the spiral winding part and the outermost part, the inner diameter of the large diameter spiral winding part is slightly enlarged, while the outer diameter of the small diameter spiral winding part is slightly reduced, while the small diameter spiral winding part is inwardly expanded. After pushing in at least half of the number of turns of the spiral winding portion, the small-diameter spiral winding portion can be hit outside and inserted into the large-diameter spiral winding portion.

Hereinafter, the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

(Example) FIG. 1 is a front view showing a tube configuration of a triple-winding heat exchanger manufactured by the present invention, and FIG. 2 is a sectional view taken along line II-II thereof. In the figure, a spiral inner tube 2 having a small diameter, a medium tube 3 having an inner diameter corresponding to the outer diameter of the inner tube 2 and an inner tube having an inner diameter corresponding to the outer diameter of the inner tube 3 are respectively included in the plate 1. The pipe ends 22 and 2 projecting in a tangential direction in the same direction at the diagonal positions of the spiral winding parts 21, 31 and 41, respectively.
3,32 and 33,42 and 43 are inserted and fixed.

FIG. 2 is a front view of an apparatus for producing the large, medium and small diameter spirally wound pipes 2, 3 and 4, and one end 51 of the straight metal pipe 5 is provided on the outer periphery.
And a metal straight pipe 5 extending in a tangential direction from the locking position of the roller to support the metal straight pipe 5 so that it can vibrate in the spiral traveling direction. Via the support frame 7 for horizontally supporting the drive shaft 62 in which the spiral winding rollers 6, 6'having an outer diameter corresponding to the inner diameter of the drive shaft 6 are replaceably mounted, and a speed reducer inserted in the support frame 7. Driving means 8 for decelerating and driving the roller, and the roller 6
Extending parallel to the outer peripheral surface of the
An abutting member 9 for abutting and supporting the abdomen of the metal straight pipe 5 wound around the roller 6 by abutting the abdomen 52 of the metal straight pipe 5 which is locked at a fixed distance from its end. The tube is made of water and water is injected into the tube to close both ends with rubber stoppers. The tube is frozen in a freezer to fill an internal space. One end 51 of the straight metal tube 5 is placed at a constant distance from the roller 6. And the metal straight pipe 5 extending tangentially from the locking position of the roller 6 while being inserted through a gap with the abutting member 7 extending in parallel and locked to the outer periphery of the roller 6 via the engaging portion 51. When the roller 6 is rotated clockwise while being swung right and left by an amount equivalent to the spiral inclination angle and abutting against the abutting member 7, the liquid frozen body in the pipe opposes the pipe flattening force at the time of winding, A spiral tube can be manufactured by winding a straight metal tube around the roller in a spiral state without flattening. It has been cut way.

FIG. 4 is a perspective view of an apparatus for interposing the plurality of spirally wound tubes 2, 3 and 4 into each other to form a double or more spirally wound tube, and one end 22 of the spirally wound tube 2 having a small diameter. Inside of the spiral winding portion 31 of the medium diameter spiral winding tube 3 so as to project from the other side through the inside of the spiral winding portion 31 of the spiral winding tube 3.
21a and a pair of opposing pressing members 100, 100 that engage with and sandwich the outermost portion 31a of the spiral winding portion 31 of medium diameter, and a vise mechanism 110 that reduces or expands the interval between the pressing members 100.
And a vise driving mechanism 120 for driving the vise mechanism forward and backward with an electric motor via a transmission mechanism 130. By slowly operating the pressing members 100, 100 via the vise mechanism 110, The inner diameter of the combined large-diameter spiral winding part is slightly enlarged, while the small-diameter spiral winding part is expanded.
This is an insertion device for a spiral winding tube in which the outer diameter of 21 is slightly reduced and the small-diameter spiral winding portion 21 can be pushed from the inside one by one, and one end 22 of the small diameter spiral winding tube 2 is enlarged. The inner portion 21a of the small-diameter spiral winding portion 21 which is formed by projecting from the other side through the inside of the spiral winding portion 31 of the spiral winding tube 3 having a small diameter.
By enlarging the large-diameter spiral winding part 31 and the outermost part 31a, the inner diameter of the large-diameter spiral winding part 31 is slightly enlarged, while the outer diameter of the small-diameter spiral winding part 21 is slightly reduced and at the same time Push the spiral winding part 21 from the inner side 21a one by one,
After pushing in at least half the number of turns of the spiral winding portion 21, the outside of the small diameter spiral winding portion is hit with a hammer or the like to be inserted.

(Effects of the Invention) As is apparent from the above description, according to the present invention, the spiral winding portion manufactured in the spiral winding step and the end portion projecting in the tangential direction from the spiral winding portion and extending from the spiral winding portion are the spiral winding portions. Since a spiral wound tube with a small diameter and a spiral wound tube with a similar shape having an inner diameter corresponding to the outer diameter of the spiral wound tube that ends in the same direction at the diagonal position are produced, the spiral wound tube can be A small-diameter spiral winding part and a large-diameter spiral winding part combined so that one end of the small-diameter spiral winding pipe is projected from the other side through the inside of the spiral winding part of the large-diameter spiral winding pipe. By engaging and pinching with the outermost part of and, both are inserted and configured as a double layer or more, so that a simple vise device can be assembled. Therefore, there is an effect that it is possible to manufacture a multi-winding spirally wound tube that is inexpensive and hardly deforms and has excellent heat exchange efficiency.

[Brief description of drawings]

FIG. 1 is a perspective view of a multi-turn spiral tube according to the present invention, FIG. 2 is a sectional view taken along the line II-II, FIG. 3 is a perspective view of a spiral tube manufacturing apparatus, and FIG. It is a perspective view of an assembly device. 2,3,4 ... spiral wound tube, 5 ... metal straight tube, 6 ... spiral wound roller, 7 ... support frame, 8 ... drive means, 9 ...
… Abutting member 100 …… Pressing means, 110 …… Vise force mechanism.

Claims (2)

[Claims] 1. A metal straight pipe (5) is used to manufacture at least first and second spiral wound pipes (2, 3), and the first spiral wound pipe is inserted into a second spiral wound pipe to form multiple or more double windings. In manufacturing the pipe, (a) a freezing liquid is injected into the metal straight pipe 5 to close both ends thereof, and the metal free pipe 5 is frozen to fill an internal void and one end 51 of the filled metal straight pipe. Is fixed to the outer circumference of the spiral winding roller 6 or 6'having an outer diameter corresponding to the inner diameter of the spiral winding tube, while a straight metal tube 5 extending tangentially from the locking position 61 of the roller is fixed to the roller. The roller 6 or 6 is rotated in a predetermined direction in a state of abutting against abutting members 9 extending in parallel at a distance so as to counter the tube flattening force at the time of winding by the liquid frozen body in the tube. ′ A straight metal tube is wound around the outer circumference in a spiral state, and the spiral winding portion 21 and the spiral winding portion are The first metal spiral winding tube 2 having a small diameter, whose ends 22 and 23 projecting in the tangential direction and extending in the same direction across the spiral winding portion and ending in the diagonal direction, the spiral winding portion 31, and the spiral winding portion. End portions 32, 33 projecting from and extending in the tangential direction thereof
Is a spiral winding step of manufacturing a large diameter second metal spiral winding tube 3 that ends in the same direction in a diagonal position across the spiral winding portion, and (b) the small diameter first spiral tube manufactured in the spiral winding step. In inserting the spirally wound tube 2 into the second spirally wound tube 3 having a similar diameter and having an inner diameter corresponding to the outer diameter thereof to form a spirally wound tube of double or more, One end 22 is made to protrude from the other side through the inside of the spiral winding portion 31 of the large diameter spiral winding tube 3, and the inner portion 21a of the combined small diameter spiral winding portion 21 and the maximum of the large diameter spiral winding portion 31 are combined. By sandwiching the outer portion 31a, the inner diameter of the large-diameter spiral winding portion 31 is slightly enlarged, while the outer diameter of the small-diameter spiral winding portion 21 is slightly reduced, and the small-diameter spiral winding portion 21 is formed from the inside by one wheel. And then at least half of the number of turns Method of manufacturing a helically wound portion 21 multi-turn metal spirally wound tube, characterized in that comprising the interpolating assembly process by striking the outside large-diameter helical winding unit 31. 2. An engaging portion 61 for locking one end 51 of the metal straight pipe 5 on the outer periphery and supporting the metal straight pipe 5 extending tangentially from the locking position of the roller so as to be capable of vibrating in the spiral traveling direction. The spiral winding roller 6 having an outer diameter corresponding to the inner diameter of the spiral winding tube.
A supporting frame 7 for axially supporting the roller 7, driving means 8 for decelerating and driving the roller via the supporting frame 7, and extending parallel to the roller at a constant interval,
An abutting member 9 for abutting and supporting the abdomen of the metal straight pipe 5 wound on the roller by abutting on the abdomen 52 of the metal straight pipe 5 whose one end is locked at a certain distance from the end 51 thereof. And a spiral winding part 21 manufactured by the spiral winding device and end portions 22 and 23 extending in a tangential direction from the spiral winding part so as to extend in a diagonal position across the spiral winding part 21. A device for inserting into a spiral winding tube 2 of small diameter which ends in the same direction and a spiral winding tube 3 of similar shape having an inner diameter corresponding to its outer diameter, wherein one end of the spiral winding tube 2 of small diameter is inserted. The inner portion 21a of the small-diameter spiral winding portion and the outermost portion 31a of the large-diameter spiral winding portion, in which the portion 22 is combined so as to project from the other side through the inside of the spiral winding portion 31 of the large-diameter spiral winding tube 3, A pair of opposing pressing members 100, 100 that engage with and sandwich the Vise mechanism to small or expand 110
And a vise driving mechanism 1 for driving the vise mechanism 110 with an electric motor
By slowly operating the pressing members 100, 100 via the vise mechanism 110, the inner diameter of the combined large-diameter spiral winding portion 3 is slightly increased, while the small-diameter spiral winding portion 21 is provided. The inner diameter of the spiral winding part 21 with a small diameter
An apparatus for manufacturing a multi-winding tube, comprising: an insertion device for a spiral winding tube configured to be able to push in one wheel at a time from a and to press at least half of the number of turns of the spiral winding portion 21.