JPH0685944B2 - Corrugated pipe manufacturing equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a corrugated pipe manufacturing apparatus used for a heat exchanger or the like.

(Prior Art) Conventionally, in manufacturing a heat exchanger or the like, it is well known to use a so-called corrugated pipe having a portion where a pipe wall is narrowed from the outside and deformed in a spiral shape between smooth joints on both sides. Has become. It has been proved by the test measurement that the heat exchange rate is remarkably improved in the pipe of this type due to the increase of the heat transfer surface and the turbulent flow of the liquid caused by the waveform deformation of the flow path.

However, the development of such use of corrugated pipes has been hampered by the difficulty of commercializing the corrugated pipes, and the currently available devices were far from satisfactory (object of the invention). An object of the invention is to eliminate the drawbacks of the prior art and to provide a corrugated pipe manufacturing apparatus which has a high production speed and a low maintenance cost.

Further, another object of the present invention is to manufacture a corrugated pipe having an end portion (or one or a plurality of portions along the entire length) which is easy to connect and fix at a fixed position. Providing manufacturing equipment.

(Structure of the Invention) In order to achieve the above object, the corrugated pipe manufacturing apparatus of the present invention has: (a) a head having a through hole in the axial direction and rotated around the pipe; and (b) penetration of the head. A pipe feed member that moves the pipe at a controlled speed through the hole and can be stopped correctly; (c) a rotary drive member that rotates the head relative to the pipe in a fixed position; A squeezing roller that is attached so as to be movable in the radial direction and at an appropriate angle with respect to the plane perpendicular to the axis, presses against the moving pipe peripheral wall to form a corrugated spiral, and (e) moves in the radial direction to the head. A cutting roller that can be attached to the plane perpendicular to the axis and that cuts a stopped pipe; (f) A diaphragm forming position where only the diaphragm roller is moved inward in the radial direction of the head; and only the cutting roller in the radial direction of the head. Within Axial movement is possible with respect to the head so as to selectively displace each roller to the cutting position moved to one side and the non-operating position where both the squeezing roller and the cutting roller are moved inward in the radial direction of the head. And a cam member that rotates about the axis together with the head, and an axial drive device for the cam member.

Therefore, if the cam member is moved to one end while the head is rotated and the pipe is fed, the squeeze roller immediately forms a corrugated spiral on the peripheral surface of the pipe and stops the pipe at a predetermined position, and at the same time, the cam member If the moving member is moved to the intermediate portion, the squeezing roller and the cutting roller do not engage with the pipe, so the pipe is moved for a predetermined length and stopped, and when the cam member is moved to the other end, the cutting roller is pressed against the pipe. The pipe is cut. By thus operating the respective members in a linked manner, it is possible to easily manufacture a corrugated pipe having a corrugated portion and a smooth portion at predetermined positions.

Further, in the apparatus of the present invention, it is possible to arrange the squeezing rollers equiangularly at a plurality of positions in the circumferential direction with respect to the head, and simultaneously form a plurality of spiral corrugations on the peripheral surface of the pipe. .

(Example) Next, the Example of this invention is described according to drawing.

In FIGS. 1 to 6, two flanges 2, 2 are vertically provided on a base 1 which constitutes a frame of a corrugated pipe manufacturing apparatus, and a rotary sleeve 4 and a roller bearing 3 are provided on these flanges 2, 2. It is supported horizontally through. The rotary sleeve 4 has a pulley 5 close to one end thereof.
A belt 6 connected to a motor (not shown) is stretched around the pulley 5 so that the speed can be adjusted. A socket 7 is axially inserted inside the rotary sleeve 4, and one end of the socket 7 is supported by a leg 8 connected to the base 1. Also socket 7
Is directed toward the roller device 9. The roller device 9 guides the pipe to be processed and continuously moves it in the axial direction, and the speed is adjustable by itself.

In particular, as shown in FIGS. 1 and 2, a horizontal bracket 10 is supported on the flanges 2, 2 of the frame, and an open end of the horizontal bracket 10 has a lower end at an opening 1a of the base 1.
Two pivot arms 1 connected to the yoke 12a through
2 and 12 are connected by a spindle 11. The yoke 12a is fixed to the end portion of the drive portion 13 of the pneumatic or hydraulic jack 14 having a two-step action. As the jack 14 extends or retracts, the yoke 12a moves the pivot arms 12, 12 to the first position.
Move to one of the tilting positions indicated by 12 'and 12 "in the figure.

As shown in FIG. 3, the end of the rotary sleeve 4 on the side opposite to the side on which the pulley 5 is attached has a bearing 16 between the end and the socket 7, and the rotary heads adjacently arranged. 15 is firmly connected by a plurality of bolts (not shown).

The rotary head 15 is provided with through holes 15a (see FIG. 4) for mounting the cylindrical guide 17 in the radial direction. At the end of each guide 17, a flange portion 17a fixed to the rotary head 15 with a screw 18 is provided so as to project.

The opening 17b (see FIG. 4) provided coaxially with each guide 17 is formed in a polygonal contour (rectangular in the expected commercialization example), and the block 19 can slide in the opening 17b. Inserted in. The block 19 has the shape of a downward open yoke, and includes a horizontal shaft 20 that supports a squeezing roller 21 or a cutting roller 22. Each block 19
A collar 19 having a stud bolt 23 (only one of which is omitted in FIGS. 3 and 4) is attached downwardly.
a is projected, and each block 19 is attached with the collar 19a on the outside. Each stud 23 has a corresponding guide
The spring 24 is inserted into a bottomed hole 17c provided in the hole 17, and the collar 19a, that is, the block 19 is biased outward by the spring 24. 2 and 3, the drawing roller 21 for drawing metal, that is, the corrugating device is provided in the upper block 19, and the cutting roller 22 for cutting the pipe is shown in the lower block 19. It is provided in. Where the cutting roller 22
The screw 18 for fixing the guide 17 mounted with the block 19 on the side is screwed into the screw hole of the rotary head by inserting the screw shaft without a gap into the hole provided in the flange portion 17a of the guide 17. However, the method of fixing the guide 17 on the side supporting the squeeze roller 21 is different from this. As shown in FIG. 4, the guide 17 on the side supporting the squeezing roller 21 is provided with an arc-shaped hole 17d which is concentric with the axis of the opening 17b, and the screw 18 is inserted into this hole 17d. Therefore, the directions of the guide 17 and the squeeze roller 21 with respect to the axis of the rotary head 15 can be adjusted.

A pin 19b is attached to the collar 19a of each block 19 and each of these pins 19b is adapted to move along a cam surface formed by a combination of two rings 25, 26 surrounding the rotary head 15. It has a hemispherical shape. Two longitudinal grooves 25a, 25b and grooves 26a, 26b for receiving the pin 19b are provided opposite to each other on the inner surface of each of the rings 25, 26. Here, the bottom surfaces of the grooves 25a and 26a are parallel to the center lines of the rings 25 and 26, while the bottom surfaces of the grooves 25b and 26b are formed obliquely with respect to the center lines of the rings 25 and 26 and correspond to each other. The operation slope of the block 19 is formed. Further, the grooves 25a, 26a and the grooves 25b, 26b are alternately arranged, and the inclined surfaces are reversed, and when the rings 25, 26 are mounted, the grooves 25b and 26b are formed.
It forms an inclined surface opposite to.

Two rollers 27, 27 supported by the pivot arm 12 are provided around the ring 25 or the ring 26 (in this example, the ring 26).
The annular groove 26c that forms the orbit of
5,26 are jacks regardless of the rotational movement by the rotary head 15.
By the operation of 14, the axial movement can be surely performed.

Next, the operation of the above embodiment will be described.

In the state shown in FIGS. 1 and 3, the rings 25, 26
Is in an intermediate position, and the pins 19b of the two opposing blocks 19 and 19 are located in the parallel grooves 25a and 26a. In this state, the advancing speed given to the smooth pipe 28 by the roller device 9 is adjusted according to the rotating speed of the rotating sleeve 4 and the inclination angle given to the diaphragm roller 21.

The smooth pipe 28 extends axially through the fixed socket 7,
Further, the inner tube 29 (see FIG. 3) attached to the end of the fixed socket 7 is penetrated. The pipe 28 is further passed at a right angle to the squeezing roller 21 and the cutting roller 22,
It is guided into an outlet guide member, for example, an outlet tube 30, which is supported by a column 31 (see FIG. 1) fixed to the base 1.

When the tip length of the pipe 28 extending across the faces of the squeezing roller 21 and the cutting roller 22 reaches a desired length corresponding to a smooth connecting sleeve, the driver extends the jack 14 to move the pivot arm 12 into the first position. Move to the position 12 'in the figure,
This causes the rings 25, 26 to move to the position shown in FIG.

By such movement, the block 19 on the side provided with the squeezing roller 21 is pushed back toward the center of the guide 17 against the coil spring 24 by the action of the pin 19b. As a result, the squeezing roller 21 is pressed against the pipe 28 and the pipe 28
A spiral mountain or wave is formed in the pipe, and the pipe is passed through the outlet guide member of the column 31 in such a corrugated state (see 28 'in the figure).

Further, when the rings 25 and 26 are moved as described above, the block 19 on the side provided with the cutting roller 22 does not move with respect to the corresponding guide 17. The reason is that the pin 19b passes through the groove 26a having parallel bottom surfaces.

When the driver reversely adjusts the jack 14, an action other than "corrugation" is performed. That is, when the jack 14 is retracted and the pivot arm 12 is moved to the tilting position shown by the column 12 ″ in FIG. 1, the rings 25 and 26 are in the state as shown in FIG. By such axial movement, the block 19 on the side having the squeeze roller 21 is pushed back outward in the radial direction by the coil spring 24 and is pin 19b.
Enter into the groove 25a having a parallel bottom surface, and the squeezing roller 21 separates from the pipe 28. On the other hand, in the block 19 on the side having the cutting roller 22, the pin 19b thereof moves along the groove 25b having the inclined bottom surface and is pushed inward in the radial direction.
22 cuts across the pipe 28.

As is clear from the above, the movement of the position of the pivot arm 12 is carried out in two steps from 12 '(corresponding to FIG. 5) to 12 "(corresponding to FIG. 6). When reaches a predetermined value, the driver operates the jack 14 to move the rings 25 and 26 to the intermediate position shown in FIG. Although the "corrugation" is completed by such an operation, the pipe 28 still continues to advance. Next, the driver stops the roller device 9 to stop the axial movement of the pipe 28, and further operates the jack 14 to move the cutting roller 22 in the radial direction to cut the pipe 28.

As described above, the apparatus according to the present embodiment can manufacture the corrugated pipe, that is, the corrugated pipe, with an arbitrary new length.

The apparatus shown in FIGS. 7 to 9 is a corrugated pipe manufacturing apparatus capable of spirally engraving three peaks on a pipe at an angle of 120 ° with respect to each other and having a very high production speed.

The apparatus of this embodiment has a gear 32 connected to a speed-adjustable motor (not shown) through a chain 33, which is a horizontal sleeve 34 rotatably supported by a frame. It is keyed on. This sleeve 34 is integrally connected to a rotary head 35 inserted inside an operation cam 36 on the side opposite to a device (not shown) for correcting and advancing the pipe, and the operation cam 36 is connected to the sleeve 34. It is connected to a turntable 37 pivotally supported by a bracket 38 provided in the vertical direction via a rod 37a in the longitudinal direction. The bracket 38 is provided with guides 39, 39 for keeping the bracket 38 at a constant angular position, and the bracket 38 is fixed to the driving unit 40 of the jack 41, and the bracket 38 shown in FIG.
Similar to the embodiment shown in FIG. 6, the position of the operation cam 36 can be changed by extending and retracting the drive unit 40.

The rotary head 35 has three radial grooves or holes 35a arranged at an angle of 120 ° to each other, and each groove 35a has a holder for a squeezing roller 43 for "corrugation". A cylindrical block 42 constituting the above is mounted (see FIG. 8). A slider 45 is attached to each block 42 on the side opposite to the side where the aperture roller 43 is attached via a screw 44, and an outer portion of the slider 45 is provided with a corresponding groove 46a provided in a cam body 46 of the operation cam 36. Formed in a dovetail-like engagement profile. The bottom surface of the groove 46a is formed in an inclined shape as shown in FIG. 7, and plays the role of an inclined guide surface that enables the slider 45 to move in the radial direction.

Turning the screw 44 which assembles the block 42 and the slider 45 changes the direction of the block 42 in the groove 35a, which also changes the direction of the corresponding squeezing roller 43 relative to the axis of the vipe 28. Has become. Each slider
A vernier scale 45a is engraved around 45.
The vernier scale 45a works in cooperation with a mark provided in advance to the vernier scale 45a to facilitate the above adjustment.

The rotary head 35 is formed with two cylindrical grooves 35b facing each other at a position axially separated from the groove 35a (see FIG. 9). In one of these grooves 35b is inserted a block 47 provided at the end toward the center of the cutting roller 48, and the other end of this block 47 is a groove 46b provided from the rotary head 35 toward the cam body 46. And dovetailed with each other. The bottom surface of the groove 46b is parallel to the bottom surface of the opposing groove 46a as shown in FIG. Also, the other groove 3
The receiving member 49 is inserted into the 5b and is fixed to the rotary head 35.

The operation of the above embodiment is almost the same as that of the embodiment shown in FIGS. 2 to 6, and the smooth pipe 28 is continuously moved in the axial direction from the fixed socket 50 through the bracket 38 and the rotating sleeve 34. Then, it is guided into the rotary head 35 which is rotated integrally with the rotary sleeve 34 (see FIG. 7). When the driving portion 40 of the jack 41 is extended, the operation cam 36 moves to the right in FIG. 7 and the three sliders 45 are simultaneously driven, and the squeezing roller 43 of the corresponding block 42 is moved in the radial direction to move to the pipe 28. Pressed.

On the other hand, due to such movement of the operation cam 36, the block 47
Are moved in the opposite radial direction and the cutting roller 48 moves the pipe 2
Separated from 8 '. When the jack 41 is moved backward to move the operation cam 36 after such a "corrugation" operation, the block 42 having the squeezing roller 43 is moved radially outward, and at the same time, the block 47 having the cutting roller 48 is moved. Moved towards the radial center. The cutting roller 48
Of course, the cutting operation is performed after stopping the advance of the pipe 28.

The device of the present invention is particularly suitable for fully automatic operation with preset lengths of the "corrugated" portion and the smooth sleeve portion of each pipe produced. Also, the number of squeezing rollers for "corrugating" can be varied over a wide range depending on the type of "corrugating" or corrugated pipe being manufactured and the desired production rate. Further, the movement of the squeezing roller or the cutting roller is not limited to the linear shape as in the above-described embodiment, but the angular movement (d
It is also possible to make it done by the drive cam which makes placement angulaire).

Also, with the control of the forward speed of the pipe and the rotational speed of the head, by controlling the direction of the squeezing roller, it becomes possible to manufacture with any "wavy" of the spiral angle,
It is also possible to produce lengthwise "waves" by keeping the head stationary at a constant angle.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a schematic sectional side view of a part of a corrugated pipe manufacturing apparatus, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is FIG. FIG. 4 is an enlarged vertical sectional view showing the rotary head and the operation cam portion of the corrugated pipe manufacturing apparatus shown in FIG. 4, and FIG. 4 is an exploded perspective view showing a state in which the aperture roller is attached to the rotary head shown in FIG.
FIGS. 5 and 6 show a third actuating position, respectively.
A sectional view similar to the figure, FIG. 7 is a partial sectional schematic side view of a corrugated pipe manufacturing apparatus of another example, and FIGS. 8 and 9 are sectional views taken along lines VIII-VIII and IV-IV of FIG. 7, respectively. It is a figure. 15,35 …… Rotating head 21,43 …… Squeezing roller 22,48 …… Cutting roller 28,28 ′ …… Pipe

Claims (6)

[Claims] 1. A corrugated pipe manufacturing apparatus for forming a corrugated spiral on an outer peripheral surface of a pipe and cutting the pipe at an appropriate position in order to manufacture a corrugated pipe used for a heat exchanger or the like. a) a head having a through hole in the axial direction and rotated around the pipe; and (b) a pipe feed member capable of moving the pipe at a controlled speed through the through hole of the head and stopping the pipe correctly. And (c) a rotary drive member for rotating the head with respect to the pipe in a fixed position, and (d) a pipe which is attached to the head so as to be movable in the radial direction and at an appropriate angle with respect to a plane perpendicular to the axis, and which moves. A squeezing roller that presses against the peripheral wall to form a corrugated spiral; (e) a cutting roller that is attached to the head movably in the radial direction and at a right angle to the axis and that cuts the stopped pipe; and (f) a squeezing roller. Only the cutting roller is moved inward in the radial direction of the head, the cutting position where only the cutting roller is moved inward in the radial direction of the head, and the drawing roller and the cutting roller are both moved inward in the radial direction of the head. A cam member that is movable in the axial direction with respect to the head so as to selectively displace each roller to the moved non-operating position, and that rotates with the head about the axial center; and an axial drive device for the cam member. Corrugated pipe manufacturing equipment. 2. The squeezing roller and the cutting roller are pivotally supported at the inner ends of blocks that are reciprocally supported in radial holes provided in the head. Corrugated pipe manufacturing equipment. 3. The corrugated pipe manufacturing apparatus according to claim 2, wherein the block for the squeeze roller can be rotated in the hole of the head to adjust the inclination of the squeeze roller with respect to the plane perpendicular to the axis of the pipe. . 4. The corrugated pipe according to claim 2, wherein the block is capable of contacting the working surface of the cam member through a pin-shaped or slider-shaped projection provided on the outer end of the block. Manufacturing equipment. 5. The cam member has a cylindrical shape surrounding the outer periphery of the head, and has a cam groove having an inner peripheral surface and a bottom surface inclined in the axial direction that engages with the protrusion, on the diaphragm roller and the cutting roller. The corrugated pipe manufacturing apparatus according to claim 4, which is provided for the corrugated pipe. 6. The squeezing roller is equiangularly arranged at a plurality of positions in the circumferential direction of the head so as to simultaneously form a plurality of spiral corrugations on the peripheral surface of the pipe. The corrugated pipe manufacturing apparatus according to the item.