JP2696663B2 - Pipe expansion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe expander for a heat exchanger,
More specifically, the present invention relates to a pipe expanding device for integrally fixing a large number of radiating fins constituting a heat exchanger and a plurality of tubes inserted through the respective radiating fins by expanding the tubes.

[0002]

2. Description of the Related Art Conventionally, as this type of tube expanding device, for example, as shown in FIG. 5 (a), a through hole 9b is formed at a central portion so as to be reciprocable via a pair of inverted cylinders 8. On the lower surface 9a of the reciprocating member 9 having a substantially rectangular shape, a locking head 10 is provided.
a has a mandrel locking body 9c provided with a plurality of holes 9e capable of inserting a plurality of tube expansion mandrels 10 having a,
In addition, between the mandrel locking member 9c and the reciprocating member 9, there is a locking head 10a of the pipe expanding mandrel 10 during pipe expansion.
A press attachment 9d for pressing the pipe is detachably provided, and a pipe from the heat exchanger 16 at the time of expanding the pipe is provided below.
There is a tube expanding device 12 having a configuration in which a stripper plate 11 having a stripper 11a for determining a protrusion length of 14 is reciprocally movable in conjunction with the reciprocating member 9.

[0003] That is, the pipe expanding apparatus 12 having the above-described structure is provided with a plurality of radiating fins below the stripper plate 11.
A hairpin tube 14 whose lower end 14a is formed in a substantially U-shape is inserted through a plurality of rows 13 in the same direction, and end plates 15 having a predetermined shape are attached to both ends of the radiation fin 13 through which the tube 14 is inserted. The heat exchanger 16 thus formed is supported via a plurality of receivers 17, and the reciprocating member 9 is lowered via the cylinder 8.
A plurality of pipe expansion mandrels 10 can be pressed into the pipe 14 to expand the pipe 14, and the end plate 15, the radiation fins 13, and the pipe 14 can be integrally fixed. It is.

[0004]

However, the tube expanding device having the above-mentioned conventional structure has the following problems.

That is, in the above-mentioned conventional pipe expanding apparatus, a pipe expanding mandrel inserted through a reciprocating member is pressed into a pipe inserted through the heat exchanger to expand the pipe.

Therefore, when a pipe expansion mandrel is press-fitted into the pipe, distortion occurs in the entire heat exchanger as the pipe is expanded.

Accordingly, in order to prevent distortion of the heat exchanger during expansion, the heat exchanger is clamped in a direction intersecting the reciprocating direction of the reciprocating member to prevent distortion of the heat exchanger during expansion. However, the length of the heat exchanger in the direction of insertion of the tubes inserted into the plurality of radiating fins constituting the heat exchanger, and the size and shape of the end plate attached to the heat exchanger, etc. However, since there is a great deal of variation depending on the type of heat exchanger to be expanded, a very serious problem has arisen that a heat exchanger holding body that can handle all the heat exchangers having different lengths is required.

However, the present invention solves all of the above-mentioned problems, and the entire length of the heat exchanger in the insertion direction of the tubes inserted into the plurality of radiating fins constituting the heat exchanger and the heat exchanger are provided with the same. The size and shape of the end plate to be mounted
Even if it is completely different depending on the type of the heat exchanger,
It is an object of the present invention to provide an extremely excellent pipe expansion device which can instantaneously and accurately sandwich a heat exchanger and reliably prevent distortion of the heat exchanger at the time of pipe expansion.

[0009]

That is, the present invention provides at least a heat exchanger 16a for holding a heat exchanger 16a positioned from a direction intersecting a reciprocating direction of a reciprocating member 9 into which a plurality of mandrels 10 for pipe expansion are inserted. A heat exchanger sandwiching device 2 having a pair of heat exchanger sandwiches is provided, and the heat exchanger sandwiches include:
A plurality of pressing plates 2c are provided in a direction intersecting the reciprocating direction of the reciprocating body 9 and the pressing plates 2c
Is provided with a pressing plate interval adjusting device 3 which is capable of expanding and contracting each interval in a direction along the reciprocating direction of the reciprocating member 9, and the pressing plate interval adjusting device 3 is sequentially positioned. The dimensions of the protruding portion 15b of the end plate 15a mounted on one end of each of the heat exchangers 16a and protruding at least to one side of the heat exchanger 16a are read, and the end of the end plate 15 is adjusted via the pressing plate interval adjusting device 3. The pressing plate 2c moving toward the plate 15a does not contact the end plate 15a,
The point is that a pressing plate positioning / stopping device 6 for stopping positioning within the entire length of a is provided.

Further, each of the pressing plates 2c is provided so as to be able to protrude via expansion and contraction means.

[0011]

In the tube expanding apparatus having the above-described structure, at least one pair of heat exchanger holding members capable of holding the heat exchanger 16a to be expanded in a direction intersecting the reciprocating direction of the reciprocating member 9 is provided. A heat exchanger holding device 2 is provided, and the heat exchanger holding body is provided with a plurality of pressing plates 2c in a direction intersecting a reciprocating direction of the reciprocating member 9; The holding plate is provided with a pressing plate spacing adjusting device 3 which makes it possible to expand and contract the spacing between the pressing plates 2c adjacent to each other in a direction along the reciprocating direction of the reciprocating member 9.
The end plate 15a mounted on one end of each of the heat exchangers 16a sequentially positioned and protruding toward at least one surface of the heat exchanger 16a is provided on the pressing plate gap adjusting device 3. The size of the protruding portion 15b is read, and the pressing plate 2c moving to the end plate 15a side via the pressing plate space adjusting device 3 does not come into contact with the end plate 15a within the entire length of the heat exchanger 16a. Since the pressing plate positioning / stopping device 6 for stopping the positioning with the pressure plate is provided, the heat exchanger 16
The total length of the heat exchanger 16a in the insertion direction of the tube 14 inserted through the plurality of radiation fins 13 constituting the
Even if the size of the end plate 15a attached to the heat exchanger 16a is completely different depending on the type of the heat exchanger, the end plate may be completely different. Press plate 2c at 15a
The heat exchanger 16a can be instantaneously and reliably clamped through the pressing plate 2c within the entire length of the heat exchanger 16a without contacting the heat exchanger 16a.

Further, since each of the pressing plates 2c is provided so as to be able to protrude via expansion / contraction means, even if the thickness of the heat exchanger varies depending on the type or the predetermined product number, etc. The protrusion can reliably hold the heat exchanger.

[0013]

An embodiment of the present invention will be described below with reference to the drawings.

[0014] Regarding the configuration of the tube expansion device in one embodiment of the present invention, the description of the same portions as those of the conventional tube expansion device will be omitted below.

In FIG. 1, reference numeral 1 denotes a main body of the pipe expanding apparatus which is erected through a support 1b erected on a base 1a.

Reference numeral 2 denotes a heat exchanger mounting table 7 which is provided at a lower portion of the pipe expansion device main body 1 and moves on a transfer rail 7a laid freely through the pipe expansion device main body 1, and is sequentially conveyed. 1 shows a heat exchanger holding device having a heat exchanger holding body constituted by a front holding guide 2a and a rear holding guide 2b for holding a single-row heat exchanger 16a in the front-rear direction of the heat exchanger 16a. .

The front holding guide 2a, which is one of the heat exchanger holding members of the heat exchanger holding device 2, is a guide rail laid toward the front side of the base 1a of the pipe expansion device main body 1.
1b is provided so as to be movable (arrow A) facing the front surface of the pipe expansion device main body 1, and a plurality of cylinders 5 are provided on the front pressing guide 2a and the rear pressing guide 2b; By a combination of the plurality of cylinders 5, a multi-stage press plate 2 c is provided which is protrudable in a direction intersecting the reciprocating direction of the reciprocating body 9, that is, a direction along the front-rear direction of the tube expansion device main body 1. Become.

As shown in FIG. 2A, each of the cylinders 5 for projecting the pressing plate 2c is provided with a predetermined distance between adjacent cylinder case bodies 5a having the cylinders 5. In order to be able to expand and contract, a rod 4 having a predetermined length and a cylinder case stopper 4a attached to the rod 4 at a predetermined interval are connected so as to be suspended in multiple stages. .

Further, in FIG.
And a cylinder case body on one end side which is connected so as to be suspended.
5a is provided with an electric motor 3a and a speed reducer 3b, and further automatically expands and contracts the respective intervals of the cylinder case bodies 5a connected in a multi-stage manner via a helical rod 3c which is suspended or suspended at a predetermined location. A pressing plate interval adjusting device 3 is provided so as to be free (arrow B).

The pressing plate gap adjusting device 3 has an end plate 15a mounted on one end of each of the heat exchangers 16a sequentially positioned and projecting toward at least one surface of the heat exchanger 16a. The dimensions of the portion 15b are read by an infrared sensor (not shown), and the pressing plate 2c, which moves to the end plate 15a side via the pressing plate gap adjusting device 3, is moved to the end plate 15a.
A press plate positioning / stopping device 6 is provided for stopping the positioning within the entire length of the heat exchanger 16a without making contact with the heat exchanger 16a.

The pipe expansion apparatus of the present embodiment has the above-described configuration. Next, a description will be given of a case in which a heat exchanger having a different length is expanded through the apparatus.

First, the descending dimensions of the reciprocating member 9 and the stripper plate 11 according to the product number, type, etc. of the heat exchanger for expanding the pipe in advance are automatically controlled by an automatic control device (shown in FIG. ) Is stored in a central processing unit (not shown).

Next, as shown in FIG. 2A, when expanding the heat exchanger 16a having a predetermined length, the part number of the heat exchanger 16a is sent to the automatic control device (not shown). Just by inputting, via the automatic control device (not shown) and the pressing plate space adjusting device 3, the distance between the pressing plates 2c provided adjacent to both holding guides of the heat exchanger holding body is set. The pressing plates can be automatically set (arrow C) at predetermined positions at intervals corresponding to the entire length of the heat exchanger 16a. At this time, the pressing plate interval adjusting device 3 includes: Since the pressing plate positioning stop device 6 is provided, as shown in FIG. 3, the pressing plate positioning stopping device 6 is mounted on one end of each of the sequentially positioned heat exchangers 16a and projects to at least one side of the heat exchanger 16a. Of the protrusion 15b of the end plate 15a Read by the via the pressing plate spacing device 3 end plate 15a
The pressing plate 2c that moves to the side
Positioning can be stopped within the entire length of the heat exchanger 16a without making contact with the heat exchanger 16a.

Therefore, as shown in FIG. 4 (a), the heat exchanger mounting table 7 on which the heat exchanger 16a is mounted on the transfer rail 7a laid freely through the main body 1 of the pipe expansion apparatus, It is conveyed (arrow D) to a pipe expansion area immediately below a reciprocating body 9 (not shown) and a stripper plate 11 (not shown) provided on the apparatus main body 1 and is passed through a predetermined temporary stop mechanism (not shown). As shown in FIG. 2B, the heat exchanger 9 positioned by the extension of the cylinder 5 provided on the front pressing guide 2a and the rear pressing guide 2b of the heat exchanger clamping device 2 (arrow E). The protrusion of the pressing plate 2c ensures the clamping.

Therefore, the total length of the heat exchanger in the direction of insertion of the tubes inserted into the plurality of radiating fins constituting the heat exchanger, and the size and shape of the end plate mounted on the heat exchanger are determined by the following factors. Even if the heat exchanger is completely different depending on the type of heat exchanger, the heat exchanger can be instantaneously and accurately sandwiched to reliably prevent distortion of the heat exchanger during expansion.

In the above embodiment, the heat exchanger for expanding the pipe is provided at a lower portion of the main body of the pipe expander, and can pass through from one side to the other side of the main body of the pipe expander. It is mounted on the heat exchanger mounting table that moves on the transfer rail laid in the above and is sequentially conveyed, but it is essential if it is configured to face the reciprocating operation body provided in the pipe expansion device main body For example, the heat exchanger may be sequentially conveyed from the front of the pipe expansion apparatus, and may retreat to the front side of the pipe expansion apparatus again after the pipe expansion, and the heat exchanger does not necessarily move on the transfer rail provided on the main body of the pipe expansion apparatus. It is not necessary to be placed on the vessel mounting table and sequentially conveyed, and the space area is provided in front of the pipe expanding apparatus main body via a heat exchanger set table that is rotatably connected to and separated from the pipe expanding apparatus main body. It is possible that the Until no.

Further, in the above-described embodiment, the expanded tube main body has a heat exchanger sandwiched between the positioned heat exchanger and the front and rear pressing guides which are held in the front-rear direction of the heat exchanger. A heat exchanger clamping device having a body is provided, and the former front pressing guide faces a front surface of the pipe expansion device main body on a guide rail laid to extend in front of the base of the pipe expansion device main body. Is provided movably,
And, in the front holding guide and the rear holding guide,
A pressing plate projecting in a direction intersecting with the reciprocating direction of the reciprocating member by a combination of a plurality of cylinders is provided in a multi-stage manner, in short, in a direction intersecting with the reciprocating direction of the reciprocating member. A heat exchanger holding device including at least a pair of heat exchanger holding bodies capable of holding the heat exchanger is provided, and the heat exchanger holding body is provided in a direction intersecting a reciprocating direction of the reciprocating member. Press plates divided along the multi-stage are provided, and the heat exchanger sandwiching body is capable of expanding and contracting the distance between each adjacent press plate in the direction along the reciprocating direction of the reciprocating member. If the pressing plate gap adjusting device is provided, the pressing plates provided on the front pressing guide and the rear pressing guide, which constitute the heat exchanger holding body, are not necessarily a set of a plurality of cylinders. It is not necessary to protrude in the direction intersecting the reciprocating direction of the reciprocating member by the alignment, each of the pressing plates is provided on the front pressing guide and the rear pressing guide in a plane, and both the pressing guides connect the heat exchanger. Needless to say, the pressing plate may be provided so as to be able to freely contact and separate to directly hold the pressing plate.
As shown in (1), a plurality of reciprocating members may be provided in the direction along the reciprocating direction of the reciprocating member.

Further, in the above-mentioned embodiment, in the heat exchanger sandwiching body, the intervals between the multi-stage pressing plates can be expanded and contracted in the direction along the reciprocating direction of the reciprocating member. Is provided via a motor, a speed reducer, a helical rod, and the like. The point is that a multi-stage press plate is provided to securely hold heat exchangers of different heights. As long as the respective intervals can be freely expanded and contracted, the pressing plate interval adjusting device does not necessarily have to be provided via an electric motor, a speed reducer, a spiral rod, or the like. For example, a rack and a pinion, a lever, A combination of a mechanism, a cylinder, and the like may be used, and the specific expanding / contracting mechanism, the number, the mounting location, and the like of the pressing plate gap adjusting device are not limited.

Further, in the above-mentioned embodiment, one of the front holding guides of both holding guides constituting the heat exchanger holding body is
It is provided movably on a guide rail laid to extend to the front side of the base of the pipe expansion device main body facing the front surface of the tube expansion device main body. As long as the heat exchanger can be held, for example, both holding guides may be provided on the base so as to be rotatable so as to hold the heat exchanger. The specific configuration such as, mechanism, quantity, mounting location, etc. is not limited in any way.

Further, in the above-described embodiment, the end plate mounted on one end of each of the heat exchangers sequentially positioned and protruding toward at least one side of the heat exchanger is provided in the pressing plate interval adjusting device. The size of the protruding portion is read by an infrared sensor, and positioning is stopped within the entire length of the heat exchanger without contacting the pressing plate moving toward the end plate via the pressing plate interval adjusting device with the end plate. It is equipped with a pressing plate positioning and stopping device that does not necessarily need to read the size of the protruding portion of the end plate with an infrared sensor. For example, it may be a limit switch or the like, or may be installed in advance for each heat exchanger. The dimensions of the escape distance for the size and shape of the protruding portion of the end plate to be (Not shown), the part number of the heat exchanger for expanding the pipe is input to the automatic control device provided in the expansion pipe main body, and instantaneously according to the type of the heat exchanger. In addition, complete automation can be achieved to accurately clamp the heat exchanger.

Further, in the embodiment, the tube expansion device is a so-called vertical tube expansion device erected through a column erected on a base. A reciprocating mechanism inserted into the plurality of pipes to be expanded provided in the exchanger so as to be press-fittable, and a reciprocating mechanism for expanding the plurality of pipes by reciprocating the reciprocating mechanism. Needless to say, a horizontal tube expanding device may be used, and the specific shape, mechanism, configuration, and the like of the tube expanding device are not limited in any way.

However, the specific mechanisms, functions, and arrangements of the heat exchanger clamping device, the pressing plate spacing adjusting device and the pressing plate positioning / stopping device according to the present invention are all optional within the range intended by the present invention. The design can be changed freely.

[0033]

As described above, the present invention relates to a pipe expanding apparatus provided with a reciprocating mechanism for reciprocating a reciprocating member to expand a plurality of tubes inserted through a heat exchanger. The pipe expansion device main body is provided with a heat exchanger holding device including at least a pair of heat exchanger holding members capable of holding the heat exchanger in a direction intersecting a reciprocating direction of the reciprocating member. The heat exchanger clamping body is provided with a multi-stage pressing plate divided along a direction intersecting the reciprocating direction of the reciprocating member, and is adjacent to the heat exchanger clamping body, respectively. There is provided a pressing plate interval adjusting device which makes each interval of the pressing plates expandable and contractable in a direction along the reciprocating direction of the reciprocating member, and the pressing plate interval adjusting device includes various heat exchanges which are sequentially positioned. Attached to one end of the vessel and The dimensions of the protruding portion of the end plate protruding to at least one side of the exchanger are read, and the pressing plate moving to the end plate side via the pressing plate gap adjusting device is not brought into contact with the end plate without contacting the end plate. Since the pressing plate positioning / stopping device for stopping the positioning within the entire length of the heat exchanger is provided, the total length of the heat exchanger in the insertion direction of the tube inserted through the plurality of radiating fins constituting the heat exchanger is provided. However, even if it is completely different depending on the type of the heat exchanger to be expanded, or if the size and shape of the end plate attached to the heat exchanger are completely different depending on the type of the heat exchanger, Also, the heat exchanger is instantly and securely sandwiched through the entire length of the heat exchanger via the pressing plate without contacting the pressing plate with the end plate. It can be.

Therefore, distortion of the heat exchanger at the time of pipe expansion can be reliably prevented by the pressing plate.

Further, in the case where each of the pressing plates is provided so as to be able to protrude via the expansion and contraction means, the thickness of the heat exchanger mounted on the mounting table having a predetermined width is reduced. Even if the heat exchanger differs depending on the type or the predetermined product number, the heat exchanger can be reliably held by the protrusion of the pressing plate, which has a special effect.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a tube expanding apparatus according to an embodiment of the present invention, wherein FIG. 1 (a) is a front view and FIG. 1 (b) is a side view.

FIGS. 2A and 2B are enlarged side views of a pressing plate interval adjusting device of the tube expanding device according to the present embodiment, wherein FIG. 2A is an enlarged side view before operation, and FIG.

FIG. 3 is an enlarged side view of the pressing plate interval adjusting device showing a state when the pressing plate positioning / stopping device provided in the pressing plate interval adjusting device of the pipe expanding apparatus according to the embodiment is operated.

FIGS. 4A and 4B show a heat exchanger clamping device of the tube expansion apparatus in the present embodiment, wherein FIG. 4A is a partial cross-sectional plan view before the heat exchanger is clamped, and FIG. FIG.

FIG. 5 is a plan view showing another embodiment of the heat exchanger clamping device of the pipe expansion device in the present embodiment.

FIG. 6 shows a conventional pipe expanding device, and FIG.
(B) is a partially enlarged cross-sectional view of the heat exchanger at the time of pipe expansion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tube expansion device main body 2 ... Heat exchanger clamping device 2c ... Press plate 3 ... Press plate interval adjusting device 6 ... Press plate positioning stop device 15a ... End plate 15b ... Projection

Claims (2)

(57) [Claims] At least one pair of heat exchangers sandwiching a heat exchanger (16a) positioned from a direction intersecting a reciprocating direction of a reciprocating member (9) into which a plurality of mandrels (10) for pipe expansion are inserted. A heat exchanger holding device (2) having an exchanger holding body, and the reciprocating member (9) is provided on the heat exchanger holding body.
Pressing plates (2c) in the direction intersecting the reciprocating direction of
And a pressing plate interval adjusting device (3) for expanding and contracting each interval of the pressing plate (2c) in a direction along the reciprocating direction of the reciprocating member (9). Further, the pressing plate gap adjusting device (3) has an end plate mounted on one end side of each of the heat exchangers (16a) sequentially positioned and protruding toward at least one side of the heat exchanger (16a). The size of the protrusion (15b) of (15a) is read, and the pressing plate (2c) that moves to the end plate (15a) side via the pressing plate interval adjusting device (3)
A press plate positioning and stopping device (6) for stopping the positioning within the entire length of the heat exchanger (16a) without contacting the end plate (15a) with the end plate (15a). 2. The tube expansion device according to claim 1, wherein each of said pressing plates is provided so as to be able to protrude via an expansion / contraction means.