JPS618237A - Inserting device for heating tube - Google Patents

Abstract

PURPOSE:To insert and fix a heating tube easily and accurately by hanging plural holding hooks for a heating tube in the state of free reciprocating motion on a slender guide beam suspended from a horizontally movable lifting gear and providing a hook receiver at one end of the guide beam. CONSTITUTION:A heating tube 2 having a U-shaped bend is held by plural hooks 5 and lifted by a crane 1, and then is positioned to a fitting portion of a heat exchanger body 13 by moving of the crane 1 and inserted into the fitting position after vertical adjustment made by a turnbuckle 9. As the hook 5 is led to a hook receiver 12 mounted at one end of the guide beam 3, it moves along its downward path to run off the heting tube 2, and breaks away from the guide beam 3 in its width direction, and then is forcibly pushed by the following hook body 5 into the hook receiver 12. Consequently, even a fed workmen can insert and fix the heating tube very easily and accurately.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a heat exchanger tube insertion device for a heat exchanger, and in particular, it holds a prefabricated heat exchanger tube in a predetermined position and easily inserts it into a heat exchanger body. The present invention relates to a heat exchanger tube insertion device for a heat exchanger.

[Technical background of the invention and its problems]

Generally, a heat exchanger used in an exhaust heat recovery boiler or the like of a combined cycle power plant has a long U-shaped heat exchanger tube. Conventionally, to install this U-shaped heat exchanger tube,
First, a straight single tube before the U-shaped bend portion is welded is inserted into the heat exchanger body, and then the U-shaped bent portion is welded to the tube end.

However, because heat transfer tubes are long and thin and the weight of the tubes is relatively large, it takes 4.5 people to insert one tube.
Work efficiency was very poor. Welding of the U-shaped bend part (= 1 job required to perform a large number of welds in a very narrow space), and we were forced to perform difficult 141 work. It was not easy to carry out inspections, and it had the disadvantage of lacking reliability.

[Purpose of the invention]

SUMMARY OF THE INVENTION The first object of the present invention is to provide a heat exchanger tube insertion device for a heat exchanger that can hold heat exchanger tubes that have undergone t1 welding in a predetermined position and efficiently perform insertion 2 assembly.

[Summary of the invention]

In order to achieve the above object, the mounting W according to the present invention is provided with a plurality of hook bodies for holding heat exchanger tubes hanging from and attached to an elongated guide beam that is suspended almost horizontally from an elevator horizontally moving device so as to be able to freely reciprocate. In addition, the guide beam is characterized in that a hook housing portion is provided on one end side of the guide beam, so that the insertion work can be performed by moving the heat exchanger tube held in a predetermined position in the longitudinal direction. At the end of the work, the hook body is removed from the heat transfer tube in a white manner #t1112.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in FIGS. 1 and 2, a guide beam 3, which is slightly longer than the heat exchanger tubes 2, is suspended from a crane 1 almost horizontally via a wire 4. As shown in FIGS. The guide beam 3 has a long cylindrical shape with a frontage at the lower end, and has a wheel receiving part 3a extending horizontally at the curved part of the lower end indicated by -. A door wheel 6 of the hook body 5 is placed on this wheel receiver 3 a J- so as to be able to move back and forth.

A plurality of hook bodies 5 are arranged so as to be suspended from the guide beam 3, and the hook portion 7 of each hook body 5 is suspended from the door roller 6 via a connecting rod 8. , each hook body 5 moves backward in the longitudinal direction of the guide beam 3 so that it hangs. Also, a turnbuckle 9 for height adjustment is provided in the middle of the connecting rod 8. In addition, a hinge 11 is provided at the connecting portion between the hook portion 7 and the connecting rod 8. This hinge 11 allows the hook portion 7 to move in the width direction of the guide beam 3. 7-, it is.

Further, the hook portion 7 has two hooks, upper and lower, and U
The two straight tube sections of the shape heat transfer tube 20 can be hung respectively. Note that the heat exchanger tube 2 has a U
The shaped bend part has been welded and completed.1. )
use.

Further, on one end side (the left end side in FIG. 1) of the guide beam 3, a hook body accommodating portion 12 is provided (J) for accommodating the hook body 5 that has moved to this end and is -C2λ. As shown in FIG. 3, FIG. 4, and FIG. A portion 12b for guiding the hook body 5 and a portion 12c for holding the hook body 5 stationary are successively arranged. is deviated from the normal orbit and is accommodated in a state where the engagement with the heat exchanger tube 2 is completely released.

In order to install heat exchanger tubes using the heat exchanger tube insertion device having such a configuration, first, the U-shaped bend portion is welded and a plurality of hook bodies 5 are hung on the heat exchanger tubes 2 which are piled up. In this case, since the heat exchanger tube is oriented laterally (horizontally), the hook body 5 is also hung on the hinge 11 in a horizontally raised state. Then, if the whole is pulled up with the crane 1, the hook body 5 will be in a hanging state, and the heat exchanger tube will be held by the hook body 5.

Next, the crane 1 is moved and the heat exchanger tubes 2 are fitted into the heat exchanger tube mounting portion of the heat exchanger main body 13 as shown in FIG. In this case, if there are variations in the heights of the hook bodies 5, the heights are adjusted appropriately using the turnbuckles 9. In this state, if the heat exchanger tube 2 is pushed lυ in the direction of the arrow t-1, the heat exchanger tube 2 can be inserted into a predetermined position.

Furthermore, when the hook body 5 is introduced into the hook accommodating portion 12 that is placed at the end of the guide beam 3, the hook body 5 first follows a downward trajectory and is removed from the heat exchanger tube 2, and then is removed from the heat exchanger tube 2. Then, the guide beam 30 deviates in the width direction and completely separates from the heat exchanger tube 2. In this case, each hook body 5 is pushed by the hook body 5 coming later and is forcibly accommodated.

〔Effect of the invention〕

As described above, in the heat exchanger tube insertion device according to the present invention, the hook body for holding the heat exchanger tubes is reciprocally movable on the elongated guide beam that is suspended horizontally from the vertical movement device. Attach multiple units so that they are stacked one on top of the other, and remove the hook body from the heat exchanger tube when the heat exchanger tube is installed.
A hook housing part for tightening is provided on one end side of the guide beam.
Since the heat exchanger tubes are arranged in such a way that there is no need for a large number of people to hold the long and heavy heat exchanger tubes, the heat exchanger tubes can be inserted and installed very easily and accurately by a small number of people. In addition, it is possible to attach the heat exchanger tube to the heat exchanger after the J-shaped bent part is welded to the welded material. It becomes necessary to
In addition, it is possible to conduct welding inspections of heat exchanger tubes with sufficient accuracy. Therefore, according to the present invention, heat exchanger tubes can be installed extremely efficiently and with high quality.
' Can perform IJ work.

[Brief explanation of drawings]

Fig. 1 is a side view of the device in one embodiment of the present invention;
The figure is a view taken along arrow A in FIG. 1, and FIGS. 3, 4, and 5 are a plan view, a side view, and a front view showing the hook accommodating portion of the guide beam. DESCRIPTION OF SYMBOLS 1... Ri1 nose, 2... Heat exchanger tube, 3... Guide beam, 5... Hook body, 6... Door roller, 7... Hook part, 9... Turnbuckle, 11 ...Hinge, 12
...Hook body housing section, 13...Heat exchanger.

Claims (1)

[Scope of Claims] 1. A plurality of hook bodies for holding heat exchanger tubes are attached to an elongated guide beam suspended almost horizontally on an elevating horizontal movement device so as to be reciprocally movable in a hanging manner, and A heat exchanger tube insertion device characterized in that a hook body accommodating portion is provided on one end side for guiding and accommodating the hook body that has moved to the end so as to be separated from the heat exchanger tube. 2. The heat exchanger tube insertion device according to claim 1, wherein the hook body is provided with a hinge that rotatably supports the hook body that engages with the heat exchanger tube in the width direction of the guide beam. . 3. The heat exchanger tube insertion device according to claim 1, wherein the hook body is provided with a height adjuster for the hook body that holds the heat exchanger tube. 4. The heat exchanger tube insertion device according to claim 1, wherein the hook body accommodating portion is provided with a track that guides the hook body downward and in the width direction of the guide beam to remove the hook body from the heat exchanger tube. .