JPH0619944U - Tube expansion device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] The present invention is adapted to press-fit a reciprocating body after pipe expansion when it is separated from the heat exchanger and a mandrel press-fit into the pipe of the heat exchanger is pulled out from the pipe. In addition to completely eliminating deformation of the heat exchanger and damage to the mandrel caused by the heat exchanger itself moving along the moving direction of the reciprocating body through the mandrel, the heat exchanger can also be eliminated. Even if the total height of the heat exchanger in the insertion direction of the tubes inserted into the plurality of heat radiating fins constituting the heat exchanger is completely different depending on the type of the heat exchanger, the heat exchanger is instantaneously and accurately (EN) An extremely excellent pipe expanding device capable of holding the heat exchanger and preventing distortion of the heat exchanger during pipe expansion. A pipe expanding device main body is provided with a pipe expanding / retracting body separated from the heat exchanger and a mandrel press-fitted into the pipe of the heat exchanger is pulled out from the pipe. A heat exchanger movement blocking body for blocking the movement of the heat exchanger that moves together with the reciprocating body via the mandrel press-fitted is provided between the heat exchanger and the reciprocating body so as to be retractable. It is characterized by

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe expanding device for a heat exchanger, and more particularly to a pipe expanding device for integrally fixing a large number of heat-radiating fins and a plurality of pipes constituting the heat exchanger by expanding the pipes.

[0002]

[Prior art]

 Conventionally, as a pipe expanding device of this type, for example, as shown in FIG. 4 (a), it is reciprocally movable via cylinders 8 and has a substantially rectangular reciprocating shape having a through hole 9b in its central portion. The lower surface 9a of the actuating body 9 has a mandrel locking body 9c having a hole 9e into which a plurality of tube expanding mandrels 10 having locking heads 10a can be inserted, and the mandrel coupling A pressing attachment 9d for pressing the locking head 10a of the pipe expanding mandrel 10 is provided between the stopper 9c and the reciprocating body 9 so as to be freely inserted and removed. There is a pipe expanding device 12 having a structure in which a stripper plate 11 having a stripper 11a for determining the protruding length of the pipe is reciprocally movable in conjunction with the reciprocating body 9.

That is, in the tube expanding device 12 having the above-mentioned structure, a plurality of tubes 14 to be expanded are formed below the stripper plate 11 and have a plurality of heat dissipating fins 13 each having a lower end 14a formed in a substantially U shape. A heat exchanger 16 formed with desired end plates 15a, 15b at both ends of a radiation fin 13 having a tube 14 inserted therein is mounted via a receiver 17 on the heat exchanger 16. In addition, by lowering the reciprocating body 9 through the cylinders 8 and 8, the pipe expanding mandrel 10 is press-fitted into the pipe 14 as shown in FIG. The end plates 15a and 15b, the plurality of heat radiation fins 13 and the pipe 14 can be integrally fixed to each other by expanding the pipe.

[0004]

[Problems to be Solved by the Invention] However, the above conventional tube expanding apparatus has the following problems.

That is, the above-described conventional pipe expanding device is for expanding the pipe by inserting the pipe expanding mandrel inserted through the reciprocating body into the pipe inserted through the heat exchanger.

Therefore, when the reciprocating body after pipe expansion is separated from the heat exchanger and the mandrel press-fitted into the pipe of the heat exchanger is pulled out from the pipe, the heat exchanger itself is inserted through the press-fitted mandrel. Move in the moving direction of the reciprocating body, which may deform the heat exchanger or damage the mandrel.

Further, when the pipe expanding mandrel is press-fitted into the pipe of the heat exchanger as described above, distortion may occur in the entire heat exchanger due to the pipe expanding.

Therefore, in order to prevent distortion of the heat exchanger at the time of pipe expansion, the heat exchanger is clamped in a direction intersecting the reciprocating direction of the reciprocating body to prevent distortion of the heat exchanger at the time of pipe expansion. Although it can be prevented, the total height of the heat exchanger in the insertion direction of the pipes inserted through the plurality of heat radiation fins constituting the heat exchanger varies depending on the type of the heat exchanger. Therefore, not only a heat exchanger holding body capable of supporting all heat exchangers having different heights is needed, but also the reciprocating body after pipe expansion is separated from the heat exchanger as described above, and Even when the mandrel press-fitted in the pipe is pulled out from the pipe, the heat exchanger itself moves along the moving direction of the reciprocating body through the press-fitted mandrel, and the heat exchanger is deformed or the mandrel is removed. Completely eliminate damage to the There was a very serious problem that I could not do it.

Therefore, the present invention solves all of the problems described above, and a reciprocating body after pipe expansion is separated from the heat exchanger, and a mandrel press-fitted into the pipe of the heat exchanger is used. Even when the heat exchanger is pulled out from the heat exchanger, it is possible to completely eliminate the deformation of the heat exchanger and the damage of the mandrel caused by the heat exchanger itself moving along the moving direction of the reciprocating motion body through the press-fitted mandrel. Not only is it possible, but even if the total height of the heat exchanger in the insertion direction of the tubes inserted through the plurality of heat-dissipating fins constituting the heat exchanger 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 expanding device capable of instantaneously and accurately holding the heat exchanger to prevent distortion of the heat exchanger during pipe expansion.

[0010]

[Means for Solving the Problems]

 That is, according to the present invention, a plurality of pipe expanding mandrels are inserted and inserted into a plurality of pipes to be expanded provided in a heat exchanger so as to be press-fitted, and the reciprocating members are reciprocated. In a tube expanding device provided with a reciprocating mechanism for expanding the plurality of tubes, in the tube expanding device main body, the reciprocating body after tube expansion is separated from the heat exchanger, When the mandrel press-fitted into the pipe is pulled out of the pipe, a heat exchanger movement blocker for blocking the movement of the heat exchanger that moves together with the reciprocating body through the press-fitted mandrel is It is a point provided between the exchanger and the reciprocating body so as to be able to move back and forth.

Further, the heat exchanger movement blocking body is provided on at least one of a pair of heat exchanger sandwiching bodies capable of sandwiching the heat exchanger in a direction intersecting the reciprocating direction of the reciprocating body. There is a point.

Further, the heat exchanger sandwiching body is provided with pressing plates which are divided into multiple stages along a direction intersecting the reciprocating direction of the reciprocating body so as to be projectable through expansion / contraction means. Further, the heat exchanger movement blocker is integrally provided on the pressing plate, and the pressing plates are spaced apart from each other in a direction along the reciprocating direction of the reciprocating body. The point is that a pressing plate interval adjusting device that allows expansion and contraction is provided.

[0013]

In the pipe expanding device having the above-described structure, the pipe expanding / retracting body (1) in the pipe expanding device main body (1) is separated from the heat exchanger (16a) by the heat exchanger (16a). When the mandrel (10) press-fitted into the pipe (14) is pulled out from the pipe (14), the heat exchanger moves together with the reciprocating body (9) through the press-fitted mandrel (10). The heat exchanger movement blocking body (2d) for blocking the movement of (16a) is provided between the heat exchanger (16a) and the reciprocating body (9) so as to be able to move back and forth. The mandrel (10) press-fitted into the pipe (14) of the heat exchanger (16a) with the reciprocating body (9) after pipe expansion separated from the heat exchanger (16a). Even when the heat exchanger (16a) is pulled out from the heat exchanger (16a), the heat exchanger (16a) itself moves along the moving direction of the reciprocating body (9) through the press-fitted mandrel (10). And damage to mandrel (10), etc. It can be eliminated even completely.

Further, a pair of heat exchangers capable of holding the heat exchanger (16a) in a direction in which the heat exchanger movement blocker (2d) intersects the reciprocating direction of the reciprocating body (9). Since it is provided on at least one of the clamps (2), the heat exchange (16a) is prevented from being distorted by press fitting the mandrel (10) during pipe expansion. Can hold the vessel (16a).

Further, in the heat exchanger holding body (2), a pressing plate (2c) divided in multiple stages along a direction intersecting the reciprocating direction of the reciprocating body (9) has expansion and contraction means. And the heat exchanger movement blocker (2d) is integrally provided on the pressing plate (2c), and the pressing plate (2c) includes the pressing plate. Since a pressing plate interval adjusting device (3) is provided which can expand and contract the respective intervals of (2c) in the direction along the reciprocating motion of the reciprocating body (9), heat generated during pipe expansion is reduced. Depending on the type of the heat exchanger (16a), the total height of the heat exchanger (16a) in the insertion direction of the pipe (14) that is inserted into the plurality of heat radiation fins (13) forming the exchanger (16a) depends on the type of the heat exchanger (16a). Even if they are completely different, the heat exchanger (16a) can be instantly and surely divided into a plurality of pressure play plates corresponding to the total height of the heat exchanger (16a). Surely it can be pinched by (2c).

[0016]

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

Regarding the structure of the tube expanding device in one embodiment of the present invention, the description of the parts overlapping with the tube expanding device of the conventional example will be omitted below.

In FIG. 1, reference numeral 1 denotes the main body of the tube expanding device which is erected on a base 1a via columns 1b.

Reference numeral 2 denotes a heat exchanger mounting table 7 which is provided below the tube expanding apparatus main body 1 and moves on a transfer rail 7a laid so as to be able to pass through the side of the tube expanding apparatus main body 1. 1 shows a heat exchanger holding body including a front presser guide 2a and a rear presser guide 2b for holding a single-row specification heat exchanger 16a that is sequentially conveyed in the front-rear direction of the heat exchanger 16a.

The front pressing guide 2a of the heat exchanger holding body 2 is placed on a guide rail 6 laid so as to extend to the front side of the base 1a of the tube expanding apparatus body 1 and the front surface of the tube expanding apparatus body 1 is extended. The front presser guide 2a and the rear presser guide 2b are provided with a plurality of cylinders 5 so as to be movable to face each other (arrow A), and by combining the plurality of cylinders 5. A pressing plate 2c that is projectable in a direction intersecting the reciprocating direction of the reciprocating body 9, that is, a direction along the front-rear direction of the tube expanding device main body 1 is provided in multiple stages, and the front pressing guide 2a is provided. At the upper end of the pressing plate 2c provided at the uppermost position, a heat exchanger movement blocking body (2d) formed in a substantially rectangular plate body is integrally provided.

Further, as shown in FIG. 2A, each of the cylinders 5 for projecting the pressing plate 2c has a predetermined interval between adjacent case bodies 5a provided with the cylinder 5. In order to make it expandable and contractible by means of a rod body 4 having a predetermined length and a cylinder locking body 4a attached to the rod body 4 at a predetermined interval, the rod body 4 is connected in a multi-stage and suspendable manner. Become.

Further, in FIG. 2B, the case body 5a on the one end side, which is connected in a multistage manner so as to be suspended, is provided with an electric motor 3a and a speed reducer 3b, and at a predetermined position. A pressing plate interval adjusting device 3 is formed for automatically expanding and contracting (arrow B) the intervals between the case bodies 5a connected in multiple stages via the spiral rods 3c that are vertically hung or hung. .

The tube expanding apparatus according to the present embodiment has the above-described configuration, and a case will be described where the tube expansion of heat exchangers having different heights is performed through the apparatus described below.

First, an automatic control device provided in the pipe expanding apparatus main body 1 for adjusting the reciprocating body 9 and the descending dimension of the stripper plate 11 according to the product number, type, etc. of the heat exchanger for expanding the pipe in advance ( By storing the data in a central processing unit (not shown) in the unit (not shown), as shown in FIG. Only by inputting the product number of the high heat exchanger 16b into the automatic control device (not shown), the heat exchanger holding is performed via the automatic control device (not shown) and the pressing plate interval adjusting device 3. By automatically expanding the respective intervals of the pressing plates 2c provided on both pressing guides of the body 2 (arrow C), each of the pressing plates is placed at a predetermined position at intervals corresponding to the total height of the heat exchanger 16b. You can set it with.

After that, as shown in FIG. 3A, the heat exchanger mounting table 7 on which the heat exchanger 16a is mounted is placed on the transfer rail 7a which is laid so as to be able to pass through the side of the pipe expanding apparatus main body 1. , The reciprocating body 9 (not shown) and the stripper plate 11 (not shown) provided in the main body 1 of the pipe expanding apparatus are conveyed (arrow D) to a position immediately below and a predetermined temporary stop mechanism ( (Not shown).

Next, the heat exchanger 9 positioned right below the reciprocating body 9 (not shown) and the stripper plate 11 (not shown) is, as shown in FIG. The front pressing guide 2a and the rear pressing guide 2b of the device holding body 2 can be held by the protrusion of the pressing plate 2c due to the extension (arrow E) of the cylinder 5 provided at the uppermost position of the front pressing guide 2a. The upward movement of the pressing plate 2c is completely blocked by the protrusion of the substantially rectangular heat exchanger movement blocking body 2d provided on the upper end portion of the pressing plate 2c.

Therefore, even if the total height of the heat exchanger in the insertion direction of the tubes inserted through the plurality of heat radiation fins constituting the heat exchanger varies depending on the type of the heat exchanger, Sometimes, by reliably holding the heat exchanger in correspondence with the total height of the heat exchanger through the pressing plate, it is possible not only to prevent distortion at the time of pipe expansion but also to reciprocate after expansion. Even when the mandrel press-fitted into the pipe of the heat exchanger is pulled out from the pipe by separating the actuating body from the heat exchanger, the heat exchanger itself moves through the press-fitted mandrel in the moving direction of the reciprocating actuating body. It is possible to completely prevent the deformation of the heat exchanger and the damage of the mandrel, etc. by preventing them from moving together.

In the above embodiment, the heat exchanger for expanding the pipe is provided at the lower part of the main body of the expansion device and is laid so as to pass through the side of the main part of the expansion device. The pipes are placed on a heat exchanger mounting table that moves above the pipes and are conveyed sequentially, but the point is that if the structure is such that the reciprocating body provided in the body of the pipe expanding device is positioned to face it, the pipe expanding The heat exchanger does not have to be placed on a heat exchanger mounting table that moves on the side of the main body of the apparatus and that moves on a transfer rail that is freely laid, and the pieces are sequentially conveyed, for example, sequentially conveyed from the front of the pipe expanding apparatus, and Needless to say, it is possible to retreat in the forward direction of the pipe expanding device after the pipe is expanded.

Further, in the above-mentioned embodiment, the heat exchanger having a positioned heat exchanger in the main body of the tube expansion device, the front pressing guide and the rear pressing guide for holding the heat exchanger in the front-back direction of the heat exchanger. A holding body is provided, and the former front pressing guide is movably provided so as to face the front surface of the tube expanding device body on a guide rail laid so as to extend to the front side of the base of the tube expanding device body. Further, the front pressing guide and the rear pressing guide are provided with a multi-stage pressing plate protruding in a direction intersecting with the reciprocating direction of the reciprocating body by a combination of a plurality of cylinders. A heat exchanger sandwiching device including at least a pair of heat exchanger sandwiching bodies capable of sandwiching the heat exchanger in a direction intersecting the reciprocating direction of the forward / backward moving body is provided, and the heat exchanger sandwiching device. The body is provided with multi-stage pressing plates divided along a direction intersecting the reciprocating direction of the reciprocating body, and the heat exchanger sandwiching body is provided with pressing plates that are adjacent to each other. If a pressing plate spacing adjusting device that can expand and contract the spacing in the direction along the reciprocating motion of the reciprocating body is provided, the front pressing guide and the rear pressing guide of the heat exchanger holding body are not always required. It is not necessary for the pressing plates provided to project in a direction intersecting the reciprocating direction of the reciprocating body due to the combination of a plurality of cylinders, and each pressing plate is provided on the front pressing guide and the rear pressing guide in a planar manner. Needless to say, the both pressing guides may be provided so as to be freely contactable and separable so as to directly hold the heat exchanger.

In addition, in the above-mentioned embodiment, in the heat exchanger holding body, the intervals of the pressing plates provided in multiple stages can be expanded and contracted in the direction along the reciprocating direction of the reciprocating body. The pressure plate gap adjusting device for the above is installed via an electric motor, a speed reducer, a spiral rod, etc., but the point is that it is provided in multiple stages to reliably hold heat exchangers of different heights. As long as the distance between the pressing plates can be expanded and contracted, the pressing plate distance adjusting device does not necessarily have to be provided via an electric motor, a speed reducer, a spiral rod, or the like. It may be a combination of a pinion, a lever mechanism, a cylinder, and the like, and the specific expansion / contraction mechanism, quantity, and mounting location of the pressing plate interval adjusting device are not limited.

Further, in the above-mentioned embodiment, one front pressing guide of the two pressing guides constituting the heat exchanger holding body is laid so as to extend to the front side of the base of the tube expanding device main body. It is movably provided on the rail so as to face the front surface of the tube expanding device main body, but if the heat exchanger to be conveyed can be held, for example, the both pressing guides are It may be rotatably mounted on the base to hold the heat exchanger, and the specific shape, mechanism, quantity, installation location, etc. of the heat exchanger holding body are also limited. Not done.

Furthermore, in the embodiment, the pipe expanding device is a so-called vertical pipe expanding device that is erected via the columns that are erected on the base, but the point is that a plurality of pipe expanding mandrels are A reciprocating body inserted into a plurality of pipes to be expanded in the exchanger so as to be press-fitted, and a reciprocating mechanism for reciprocating the reciprocating body to expand the plurality of pipes. It is needless to say that the horizontal tube expanding device may be provided as long as the tube expanding device is provided, and the specific shape, mechanism, configuration, etc. of the tube expanding device are not limited by any means.

Further, in the above embodiment, the heat exchanger movement blocking body is formed in a substantially rectangular plate body and is integrally provided on the uppermost pressing plate provided on the front pressing guide. Moreover, the structure is such that it can be retracted to and from the upper surface of the heat exchanger so as to prevent the heat exchanger from moving upward due to the reciprocating movement of the front pressing guide. The exchanger movement obstruction body does not necessarily have to have the above-mentioned structure, but the point is that the reciprocating body after pipe expansion is separated from the heat exchanger and the mandrel press-fitted into the pipe of the heat exchanger is connected to the pipe. When the heat exchanger is pulled out from the heat exchanger, a heat exchanger transfer blocker for preventing the heat exchanger itself from moving together in the moving direction of the reciprocating body through the press-fitted mandrel. If it is provided so that it can move in and out of contact with the actuating body, The exchanger movement blocker may be directly provided on the front pressing guide, or may be provided on at least one of the front pressing guide and the rear pressing guide so as to be able to move back and forth through a cylinder, a motor, or the like. Of course, it goes without saying that the specific shape, quantity, attachment position, and drive mechanism at the time of moving the heat exchanger are not limited.

Therefore, the specific configurations of the heat exchanger holding body and the pressing plate interval adjusting device in the present invention such as quantity, shape, installation place, drive mechanism, etc. are all within the scope intended by the present invention. The design can be changed freely.

[0035]

[Effect of device]

 As described above, the present invention separates the reciprocating body after pipe expansion from the heat exchanger and pulls out the mandrel press-fitted from the heat exchanger pipe through the press-fitted mandrel. Since a heat exchanger movement blocking body for blocking the movement of the heat exchanger moving together with the reciprocating body is provided between the heat exchanger and the reciprocating body so as to be able to move back and forth, Even when the reciprocating body after pipe expansion is separated from the heat exchanger and the mandrel press-fitted into the pipe of the heat exchanger is pulled out from the pipe, the heat exchanger itself reciprocates through the press-fitted mandrel. It is possible to completely eliminate the deformation of the heat exchanger and the damage of the mandrel caused by the movement of the actuator along the movement direction.

Further, the heat exchanger movement blocking body is provided on at least one of a pair of heat exchanger sandwiching bodies capable of sandwiching the heat exchanger in a direction intersecting the reciprocating direction of the reciprocating body. Therefore, it is possible to hold the heat exchanger so as to prevent distortion of the heat exchanger through press fitting of the mandrel during pipe expansion.

Further, the heat exchanger sandwiching body is provided with a pressing plate which is divided into multiple stages along a direction intersecting the reciprocating direction of the reciprocating body so as to be projectable through expansion and contraction means. Further, the heat exchanger movement blocker is integrally provided on the pressing plate, and the pressing plates are spaced apart from each other in a direction along the reciprocating direction of the reciprocating body. Since the pressing plate interval adjusting device that allows expansion and contraction is provided, the total height of the heat exchanger in the insertion direction of the tubes inserted into the plurality of radiating fins constituting the heat exchanger during tube expansion is Even when the type of heat exchanger is completely different, the heat exchanger can be held between the height of the heat exchanger instantaneously and reliably by the pressing plates divided into a plurality of pieces.

Therefore, even when the reciprocating body after pipe expansion is separated from the heat exchanger and the mandrel press-fitted into the pipe of the heat exchanger is pulled out from the pipe, heat exchange is performed via the press-fitted mandrel. Not only can the deformation of the heat exchanger and damage to the mandrel caused by the movement of the heat exchanger itself along the movement direction of the reciprocating body not only be completely eliminated, but also a plurality of heat radiating fins constituting the heat exchanger can be eliminated. Even if the total height of the heat exchanger in the insertion direction of the pipe inserted into the heat exchanger is completely different depending on the type of the heat exchanger, the heat exchanger is held instantaneously and accurately when expanding the pipe. The present invention has a special effect that it is possible to prevent distortion of the heat exchanger.

[Brief description of drawings]

FIG. 1 shows a tube expanding device according to an embodiment of the present invention. FIG. 1 (a) is a front view and FIG. 1 (b) is a side view.

2A and 2B show a pressing plate interval adjusting device of a tube expanding device in the present embodiment, FIG. 2A is an enlarged side view before operation, and FIG. 2B is an enlarged side view during operation.

3A and 3B show a heat exchanger holding body in the present embodiment. FIG. 3A is a plan view before the heat exchanger is held, and FIG. 3B is a plan view after the heat exchanger is held.

FIG. 4 shows a conventional tube expanding device, in which FIG.
The same figure (b) is a partially enlarged sectional view of the heat exchanger at the time of pipe expansion.

[Explanation of symbols]

 1 ... Tube expansion device main body 2 ... Heat exchanger holding body 2c ... Pressing plate 2d ... Heat exchanger movement blocking body 3 ... Pressing plate interval adjusting device

Claims (3)

[Scope of utility model registration request] 1. A reciprocating body (9) in which a plurality of pipe expanding mandrels (10) are inserted so as to be press-fitted into a plurality of pipes (14) to be expanded provided in a heat exchanger (16a). ) And a reciprocating mechanism for reciprocating the reciprocating body (9) to expand the plurality of tubes (14), the tube expanding apparatus main body (1) includes: After expanding the pipe, the reciprocating body (9) is connected to the heat exchanger.
When the mandrel (10) press-fitted into the pipe (14) of the heat exchanger (16a) separated from the pipe (14a) is pulled out from the pipe (14), the reciprocating motion is performed through the press-fitted mandrel (10). A heat exchanger movement blocking body (2d) for blocking the movement of the heat exchanger (16a) moving together with the working body (9) is provided between the heat exchanger (16a) and the reciprocating working body (9). A pipe expanding device characterized in that the pipe expanding device can be freely moved in and out. 2. A pair of heat exchanger clamps capable of clamping the heat exchanger (16a) in a direction in which the heat exchanger movement blocking body (2d) intersects the reciprocating direction of the reciprocating body (9). The tube expanding device according to claim 1, wherein the tube expanding device is provided on at least one of the bodies (2). 3. The heat exchanger sandwiching body (2) has a compression plate (2c) divided in multiple stages along a direction intersecting with the reciprocating direction of the reciprocating body (9) to expand and contract. The heat exchanger movement blocking body (2d) is provided so as to project through the
The pressing plate (2c) is provided integrally with the pressing plate (2c), and the intervals between the pressing plates (2c) are set along the reciprocating direction of the reciprocating body (9). 3. The tube expanding device according to claim 2, further comprising a pressing plate interval adjusting device (3) which can be expanded and contracted in a predetermined direction.