JPH0747157Y2 - Tube expansion device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a pipe expansion of a heat exchanger, and more particularly to a pipe expansion device for fixing a large number of heat radiation fins and a plurality of pipes by the pipe expansion.

[0002]

2. Description of the Related Art Conventionally, as a tube expanding apparatus of this type, as shown in FIG. 4, for example, a plurality of tube expanding mandrels 1 are provided on a back surface 9a of a reciprocating body 9 which can be raised and lowered by a cylinder 8 or the like.
0 ... is inserted, and moreover, a plurality of radiating fins 1 are provided below.
1. A pipe 1 to be expanded whose lower end is formed in a substantially U shape
2. A heat exchanger 1 having desired end plates 13a and 13b at both ends of a radiation fin 11, which penetrates a plurality of rows 2 in the same direction in a zigzag manner and in which the tubes 12 penetrate.
4 is set, and then the reciprocating body 9 is lowered to press-fit the mandrels 10 ...
There are those in which the tubes 12 are expanded and fixed to a and 13b and the plurality of heat radiation fins 11 and are appropriately used.

In the tube expanding device 15, the tube expanding device 15 includes the substantially U-shaped tube portions 12a ... Staggeredly projecting from the end plate 13b below the heat exchanger 14.
Supported by a plurality of receivers 17 that are detachably provided on a receiver base 16 provided in the end plate 13b and the protruding pipes 12 that are substantially U-shaped when the pipes are expanded. It can protect ...

[0004]

However, the tube expanding device having the conventional receiver has the following problems.

That is, in the heat exchanger applied to the above-mentioned conventional pipe expanding device, the pipes to be expanded whose lower ends are formed in a substantially U shape in a plurality of heat dissipating fins are arranged in a plurality of rows in the same direction and in a staggered manner. Although it is constructed by penetrating, there are some in which the arrangement pattern of the above-mentioned staggered tubes is different depending on the order from the delivery destination.

Therefore, when expanding the heat exchanger 14 in which the arrangement patterns of the substantially U-shaped tube portions 12a protruding in a zigzag manner from the lower end portion of the end plate as described above are different, FIG. As shown in FIG.
Depending on the arrangement pattern of ..., the installation location of the receiver 17 must be replaced and moved (arrow E), so time loss occurs in the desorption work etc., and the operating time of the tube expansion device is significantly hindered and produced. There have been various difficult problems such as deterioration of productivity and work efficiency.

Therefore, the present invention solves all of the above-mentioned problems, and even when the arrangement pattern of the tube portions protruding in a zigzag manner from the end plate of the heat exchanger is different, the end plate is also different. Not only does the detaching work such as the replacement of the receiver that supports the more projecting pipe part unnecessary, but also the pipes with different array patterns can be reliably supported and proper pipe expansion can be performed. Another object of the present invention is to provide a pipe expanding device having extremely high production efficiency.

[0008]

That is, according to the present invention, a mandrel for expanding a pipe is press-fitted from one end side of a pipe penetrating a large number of heat radiation fins constituting a heat exchanger, and the pipe is connected to the other end side. In a tube expansion device provided with a receiver to support,
The receivers 1 are provided so as to be movable in a direction intersecting with the tubes 12 penetrating the heat radiation fins 11.

[0009]

In the tube expanding device having the above structure, the receiver supporting the other end of the tube penetrated by the plurality of heat radiating fins constituting the heat exchanger moves in the direction intersecting the penetrating direction of the tube. Since it is freely installed, the receiver is moved regardless of the arrangement pattern of the tubes protruding in a zigzag manner from the end plate provided on the other end side of the heat exchanger, and the protruding tube portion is surely secured. I can support you.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a substantially U-shaped tube portion 12a in three rows in front and rear that protrudes in a zigzag manner from a heat exchanger (not shown) set in the tube expanding device (not shown). Shows a receiver that supports.

[0012] 2a, 2b, 2c shows the receiver table where the receiver 1 ... is continuously provided, the receiver base 2a,
2b and 2c are longitudinal directions of a pipe 12 supported by the receiver 1 ... on a bed plate 6 provided on the pipe expanding device (not shown) via hydraulic cylinders 3a, 3b and 3c.
It is provided in two rows in the direction intersecting with the direction .

In the upper part of the receiver 1 supporting the above-mentioned U-shaped tube portion 12a, there is formed a hole having a flat oval shape and a semicircular cross section so that the tube portion 12a can be inserted and removed. Is formed on the bottom of the receiver 1, and the receiver 1 is provided with the receiver bases 2a, 2b,
A protrusion 1a is formed on the upper surface of 2c so that it can be inserted into and removed from the hole 2b.

The tube expanding apparatus according to the present embodiment has the above-mentioned structure, but a case will be described in which a heat exchanger having a different arrangement pattern of tube portions projecting from the end plates is expanded using the apparatus described below.

First, as shown in FIG. 1, the tube portion 12 protruding in a zigzag manner from the end plate 13b (not shown).
Depending on the arrangement pattern of a, the hydraulic cylinders 3a, 3b,
3c is contracted (arrow A), and then each of the pipe portions 12a is erected on the receiver stands 2a, 2b, 2c attached to the hydraulic cylinders 3a, 3b, 3c.
The heat exchanger 14 having a predetermined arrangement pattern can be expanded by being supported by.

Next, when expanding the heat exchanger 14 different from the above arrangement pattern, each of the hydraulic cylinders 3a, 3b, 3c is pushed (arrow B) as shown in FIG. Tube part 12 of heat exchanger 14 having a different arrangement pattern
a can be supported by the receivers 1 ... Standing on the receiver stands 2a, 2b, 2c.

Further, at the time of expanding the tube, the tube portion 12a protruding from the end plate 13b provided in the heat exchanger 14
If the arrangement pitches of the above are inconsistently different, the predetermined receiver 1 can be detached from the receiver bases 2a, 2b, 2c to reliably support the pipe portions 12a having different arrangement pitches.

Further, as shown in FIG. 3, a plurality of receivers 1 ... Are detachably erected on a receiver stand 5 integrally formed and moved above the bed plate 6 by a servo motor 4a, 4b and the servo motor 4
Moving devices 7a, 7 having a mechanism for moving the receiver base 2e back and forth and left and right (arrows C and D) by the operation of a and 4b.
By combining with b, it is possible to finely adjust the movement (arrows C and D) of the receiver base 5, and thus it is possible to make the NC compatible with various heat exchangers.

In the above embodiment, a plurality of receivers for supporting the tube portions projecting in a staggered manner from the end plates of the heat exchanger are provided on the receiver stands provided in three rows in front and back of the tube expanding device. Although it is configured to stand individually and to move each of the front row and the rear row separately by moving means such as a hydraulic cylinder, the present invention is not limited to this. For example, each receiver itself individually moves to the front, rear, left and right. Needless to say, the mechanism may be used, and the arrangement pattern is not limited to the front and rear three rows, and the arrangement pattern is not limited to the staggered shape, and may be a linearly arranged pattern or the like.

Further, in the above-mentioned embodiment, the moving means for moving the receiver base is composed of a hydraulic cylinder, but in short, a device composed of an air cylinder, a servomotor or the like may be used as long as it moves the receiver base. The specific means is by no means limited.

Therefore, the receiver, the moving means of the receiver base, the specific shape, quantity, mechanism, etc. of the tube expanding device in the present invention are not limited by any means. If the receiver supporting the tube portion projecting from the other end of the vessel is provided so as to be movable in the direction intersecting with the tube penetrating the heat exchanger, the specific configuration is all within the scope intended by the present invention. The design can be changed freely.

[0022]

As described above, according to the present invention, a pipe expanding mandrel is press-fitted from one end side of a pipe penetrated by a large number of heat radiation fins constituting a heat exchanger, and the pipe is inserted at the other end side. In a tube expanding device provided with a receiver for supporting, the receiver is provided so as to be movable in a direction intersecting with the tube penetrating the heat radiation fin, and therefore, the receiver protrudes from the end plate of the heat exchanger during tube expansion. Even when the arrangement pattern of the pipes is different, not only is the need for complicated attachment and detachment work of the receiver that supports the pipes eliminated, it also eliminates time loss such as work time and is extremely workable. It has a special effect that it is possible to provide a pipe expanding device having excellent properties and extremely high production efficiency.

[Brief description of drawings]

FIG. 1 is a perspective view showing a receiver of a tube expanding device according to the present invention.

FIG. 2 is a perspective view showing a state in which the receiver is moving in the tube expanding device of the present invention.

FIG. 3 is a perspective view showing a state when the receiver is moved by using other moving means in the tube expanding device of the present invention.

FIG. 4 is a perspective view of a tube expanding device having a conventional receiver.

FIG. 5 is a perspective view showing a detached state of a receiver in a conventional tube expanding device.

[Explanation of symbols]

 1 receiver 2a receiver stand 2b receiver stand 2c receiver stand 3a hydraulic cylinder (moving means) 3b hydraulic cylinder (moving means) 4a servo motor (moving means) 4b servo motor (moving means) 6 bed plate

Claims (6)

[Scope of utility model registration request] 1. A pipe expanding mandrel is press-fitted from one end of a pipe penetrating a large number of heat radiation fins constituting a heat exchanger,
Moreover, in the tube expanding device in which the receiver supporting the tube is provided on the other end side, the receiver 1 ... Is provided so as to be movable in a direction intersecting with the tube 12 ... A tube expanding device characterized in that 2. The receivers 1 ... Are integrally provided on receiver bases 2a, 2b, 2c ... Which are movable in a direction intersecting with the pipes 12 by moving means provided in the pipe expanding device 15. The tube expanding device according to claim 1, wherein 3. The moving means comprises cylinders 3a, 3b, 3
The tube expanding device according to claim 1 or 2, wherein c is ... 4. The moving means is servomotors 4a, 4b.
The tube expanding device according to claim 1 or 2. 5. The receivers 1 ... Connected to the receiver stands 2a, 2b, 2c.
The pipe expanding device according to any one of claims 1 to 4, wherein the pipe expanding device is configured to be detachably attached to b, 2c. 6. The receiver bases 2a, 2b, 2c ...
Are arranged in parallel in a direction intersecting the longitudinal direction of the pipes 12 supported by the receivers 1 provided on each of the receiver stands 2a, 2b, 2c. The tube expanding device described in.