JPH0747156Y2 - Oil spray device for heat exchanger for pipe expansion - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil spraying device for spraying a predetermined amount of oil into a pipe of a heat exchanger before pipe expansion, and more specifically, it is inserted into a heat exchanger during pipe expansion. Oil for pipe expanding heat exchanger capable of simultaneously and instantaneously spraying pipe expanding oil into a plurality of pipes of the heat exchanger before pipe expanding to minimize frictional resistance of mandrels press-fitted into the pipes. It relates to a spraying device.

[0002]

2. Description of the Related Art Conventionally, when expanding a plurality of tubes inserted into a heat exchanger of this type, as shown in FIG. 4, for example, a reciprocating actuator which can be moved up and down by cylinders 8, 8, etc. 9
Pipe expanding mandrels 10 provided on the back surface 9a of the
The pipe expanding device 13 capable of performing a desired pipe expansion by pressing the mandrels 10 into each of the pipes 12 inserted into the heat exchanger 11 set in advance by lowering the pipes.
Exists.

[0003]

However, there are the following problems in the pipe expanding operation using the conventional pipe expanding device.

That is, in the tube expanding operation using the conventional tube expanding device, the tube expanding mandrel is press-fitted into the tube of the heat exchanger set to expand the tube.

Therefore, if the plurality of mandrels are simply press-fitted into the plurality of tubes inserted through the heat exchanger, the tubes and the mandrel will be easily damaged by mutual friction.

Therefore, it is usually necessary for the worker to manually apply the pipe expanding oil to each of the mandrels in order to minimize the frictional resistance just before the pipe expanding, so that a lot of time is lost in the coating work. There was a difficult problem that it happened.

Thus, the present invention solves the above-mentioned problems, and despite the fact that the operator does not have to perform a complicated oil coating operation on the mandrel or the heat exchanger tube when expanding the tube. It is an object of the present invention to provide an oil spray device for a heat exchanger for pipe expansion, which is capable of spraying and applying a predetermined amount of oil into a plurality of tubes of the heat exchanger instantaneously and simultaneously at the same time and which has an extremely excellent workability. It is what

[0008]

That is, the present invention is a nozzle plate having a plurality of nozzles for spraying a predetermined amount of oil from the openings of a plurality of tubes inserted through a heat exchanger for pipe expansion.
The nozzle plate comprises a fixing device for fixing the tube expansion heat exchanger by associating each of the nozzles of the tube expansion heat exchanger with the opening of the tube of the tube expansion heat exchanger. The nozzle provided is movably provided so as to approach or separate at the opening of the pipe.

[0009]

In the oil spraying device of the heat exchanger for expanding pipes having the above structure, the nozzle plate having a plurality of nozzles for spraying a predetermined amount of oil into the plurality of pipes forming the heat exchanger is Is provided so as to be movable toward and away from each other in the opening portion of the nozzle plate, and further, a fixing device for fixing each of the opening portions of the tubes of the heat exchanger for expanding pipes to each of the nozzles provided in the nozzle plate is provided. Therefore, the heat exchanger can be instantaneously fixed and the pipe expanding oil can be simultaneously and instantaneously applied into the plurality of pipes inserted and inserted.

[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 denotes an oil spraying device,
A pipe expansion heat exchanger 11 is installed in the lower part of the pipe expansion pipe 12 ... The nozzle plates 2 provided with a plurality of oil spray nozzles 2a for spraying a predetermined amount of oil in the plurality of inserted and juxtaposed pipes 12 are arranged before and after the pipe expanding heat exchanger 11. Two sheets are arranged in parallel corresponding to two rows of pipes.

The nozzle plates 2 and 2 are connected to the rod 4 of a hydraulic cylinder 4 provided above the oil spraying device 1.
The air cylinders 3a provided at the front and rear of both ends of the elevating plate 3 which can be raised and lowered (arrow A) via a are moved so as to approach or separate from the tubes 12 arranged side by side in the heat exchanger 11 for pipe expansion. It is provided freely.

Reference numeral 5 is provided below the oil spraying device 1.
Set the oil spray device 1 in the fixing device 5
Rotate to press both sides of the expanded tube heat exchanger 11
The rotating bodies 5a, 5a are provided.

Reference numeral 6 is a guide device provided in the fixing device 5.
In order to mount the heat exchanger 11 for pipe expansion on the guide device 6,
Of the guide rails 6a, 6a,
By moving the heat exchanger 11 for tube expansion along 6a,
Each of the openings of the pipes 12 ...
Each of the nozzles 2a ...
It is configured to correspond.

The oil spraying device for the pipe expanding heat exchanger according to the present invention has the above-described structure. When the pipe expanding oil is applied to the pipe of the pipe expanding heat exchanger set by using the following device: Will be described.

First, as shown in FIG. 2, when the hydraulic cylinder 4 (not shown) is operated to extend the rod 4a (arrow C), the elevating plate 3 provided on the rod 4a is used for expanding the pipe. It approaches (arrow D) to the opening of the tube inserted through the heat exchanger.

After that, the air cylinder 3a provided on the lifting plate 3 is operated to operate the nozzle plates 2 and 2.
, The nozzles 2a provided on the nozzle plates 2, 2 can be inserted into the tubes 12 inserted into the tube-expansion heat exchanger 11.

Therefore, by spraying a predetermined amount of the pipe expanding oil from the nozzles 2a inserted into the pipes 12 of the pipe expanding heat exchanger 11 as described above, the oil in the plurality of pipes 12 is instantly injected. Can perform coating work.

The pipes 12 inserted into the pipe-expansion heat exchanger 11 in the front and rear rows are, for example, as shown in FIG. 3, one of the tubes 12a is long and the front and rear rows have steps. Even if the nozzle plates 2 and 2 are provided separately, the individual air cylinders 3a of the nozzle plates 2 and 2 respectively extend with different strokes (arrows D and E), so that they are related to the difference in protrusion length. It is possible to perform reliable oil application work.

In the above embodiment, the oil spraying nozzle of the oil spraying device is provided on the nozzle plate provided on the air cylinder provided on the elevating plate. An elevating plate is never provided as long as it is arranged to move toward or away from the openings of a plurality of pipes that are provided and are inserted through the pipe-expansion heat exchanger, and spray a predetermined amount of pipe-expansion oil into the pipes. It is not necessary, and the means for moving the nozzle plate is not limited to hydraulic pressure, air cylinder, servo motor, etc.
It may have another mechanism.

Further, in the above-mentioned embodiment, the fixing device for fixing the tube expanding heat exchanger at a predetermined position is composed of a rotating body for fixing by fixing both side surfaces of the tube expanding heat exchanger at the same time. In short, as long as it is possible to fix the pipe expanding heat exchanger to the oil spraying device so that each of the openings of the pipe of the pipe expanding heat exchanger corresponds to each of the nozzles provided in the nozzle plate. The specific mechanism thereof does not matter.

Further, in the above embodiment, the nozzle plate having the oil spraying nozzles is inserted into the pipe heat exchanger in the front and rear rows, and the front and rear rows are arranged along the plurality of tubes arranged in parallel. However, it goes without saying that the present invention is not limited to this, and may be divided into a plurality of pieces along various arrangement patterns of tubes inserted into the heat exchanger to be expanded. Further, the nozzle provided on the nozzle plate may also have a mechanism such that it can be attached to and detached from the nozzle plate and can be changed to various patterns with one touch.

Further, in the above-mentioned embodiment, the guide device for mounting and transporting the tube expanding heat exchanger on the mounting table has a guide rail for guiding and transporting the mounting table below the nozzle plate. In short, it is possible to guide and convey the openings of the plurality of tubes inserted into the heat exchanger for tube expansion so as to correspond to the nozzles provided in the nozzle plate. The specific mechanism, shape, etc. are not limited as long as they are provided, and may be those that simply use guides or grooves, or may have an automatic mechanism that uses power such as a motor.

Thus, the specific shape, quantity, mechanism, etc. of the oil spray nozzle and nozzle plate of the oil spray device of the present invention, as well as the fixing device, guide device, etc., are by no means limited. All of its specific configurations can be arbitrarily changed in design within the scope intended by the present invention.

[0025]

As described above, according to the present invention, a nozzle plate having a plurality of nozzles for spraying a predetermined amount of oil from the openings of a plurality of tubes inserted through a heat exchanger for expanding pipes, and The nozzle plate comprises a fixing device for fixing each of the nozzles of the tube expansion heat exchanger to each of the tube openings of the tube expansion heat exchanger, and fixing the tube expansion heat exchanger. Since the nozzles are movably provided so as to approach or separate from the opening of the pipe, it is possible to simultaneously and instantaneously apply the pipe expanding oil to a plurality of pipes of the heat exchanger immediately before the pipe expanding. There is no need for complicated oil application work due to the above, and therefore there is a special effect that it is possible to provide an oil spray device for a heat exchanger for pipe expansion with extremely high work efficiency that can eliminate time loss such as work time. Came to.

[Brief description of drawings]

FIG. 1 is a perspective view showing an oil spray device of a heat exchanger for pipe expansion according to the present invention.

FIG. 2 is a side view showing a state of using the oil spray device of the heat exchanger for tube expansion of the present invention.

FIG. 3 is a side view showing a state during oil spraying of the oil spraying device of the heat exchanger for tube expansion of the present invention.

FIG. 4 is a front view showing a state during a pipe expanding operation using a conventional pipe expanding device.

[Explanation of symbols]

 1 Oil spraying device 2 Nozzle plate 2a Nozzle 3 Lifting plate 4 Hydraulic cylinder

Claims (5)

[Scope of utility model registration request] 1. Nozzle plates (2, 2) having a plurality of nozzles (2a) for spraying a predetermined amount of oil from the openings of a plurality of pipes (12) penetratingly inserted into a heat exchanger (11) for expanding pipes, and the nozzles. the nozzle 2a ... each of which is provided in the plate 2, 2, prior
The expansion plate heat exchanger 11 includes a fixing device 5 for fixing the expansion tube heat exchanger 11 by associating each of the openings of the tubes 12 ... And the nozzle plates 2 and 2 are provided with a nozzle 2a. Is provided so as to be movable toward or away from the openings of the pipes 12 ... 2. The nozzle plates 2 and 2 are constructed so that at least two nozzle plates 2 and 2 are provided corresponding to the tubes 12 arranged in parallel in the longitudinal direction of the tube expanding heat exchanger 11. The oil spraying device of the heat exchanger for tube expansion according to claim 1. 3. Cylinders 3a are provided in the nozzle plates 2 and 2 for moving the nozzle plates 2 and 2 closer to or apart from each other at the openings of the tubes 12 inserted into the heat exchanger 11 for tube expansion. It is provided, The oil spraying device of the heat exchanger for tube expansions of Claim 1 or 2 characterized by the above-mentioned. 4. The fixing device 5 includes a heat exchanger 11 for pipe expansion.
The rotating bodies 5a, 5a for rotating and pressing the opposite sides of the
The heat exchanger 11 for pipe expansion is placed and the heat exchanger 1 for pipe expansion
Nozzle plate 2,
The oil spraying device for a pipe expanding heat exchanger according to any one of claims 1 to 3, further comprising: a guide device 6 that guides and conveys to a location corresponding to each of the nozzles 2a ... 5. The nozzles 2a ...
The oil spraying device for a heat exchanger for pipe expansion according to any one of claims 1 to 4, wherein the oil spraying device is configured to be detachably attached to the second pipe.