JPH0729414Y2 - Positioning device for heat transfer promotion plate of helical coil heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a heat transfer promoting plate positioning device used for positioning a heat transfer promoting plate in a helical coil heat exchanger.

[Prior Art] As shown in Fig. 2, an example of a helical coil heat exchanger is that a helical coil heat transfer tube (hereinafter referred to as "helical coil heat transfer tube") is provided outside an inner cylinder (center pipe) 1 arranged in a main body cylinder (not shown). , Which are simply referred to as heat transfer tubes) 2 are arranged in multiple layers, and the heat transfer tubes 2 in each layer are arranged.
The heat transfer tube ladders 5 attached at appropriate positions in the circumferential direction are suspended and supported by the support beams 3 protruding from the upper part of the inner cylinder 1 in the radial direction via the suspension bolts 4, so that the heat transfer tubes 2 of the respective layers are supported. The heat transfer promoting plates 6 are held and inserted between the heat transfer tubes 2 of the respective layers, respectively.
Is hung and supported by the hanging metal fittings 7 that project from the upper part of the inner cylinder 1 in the radial direction.

Conventionally, as a positioning device for positioning the heat transfer promoting plate 6 suspended and supported by the hanging metal fitting 7, as shown in detail in FIG. 3, several layers of the heat transfer tube 2 positioned vertically in each layer are provided. (3 windings in the figure) A pair of spacer fittings 8 of the same shape that can be fitted and held in the radial direction inside and outside, and a spacer fixing bolt 9 for fixing the pair of spacer fittings 8 as a set. The heat transfer promotion plate 6 is positioned in the radial direction by the widths of the pair of spacer fittings 8 fixed by the spacer fixing bolts 9 in the inner and outer directions.

[Problems to be Solved by the Invention] However, in the case of the heat transfer promotion plate positioning method using the above-mentioned one-to-one pair of spacer fittings 8, the heat transfer promotion plate 6 is inserted between the layers of the heat transfer tube 2. Clearance C to do
Since the width dimension of the spacer metal fitting 8 of each layer is set so that is formed between the spacer metal fittings 8 of each layer, and the clearance C is slightly wider than the thickness of the heat transfer promotion plate 6. Although the work of inserting the heat transfer promotion plate 6 can be performed without difficulty, a small gap G is formed between the heat transfer promotion plate 6 and the spacer fitting 8 after the heat transfer promotion plate 6 is inserted and positioned. Will exist, and this gap G
Due to the existence of the heat transfer tube 2, the vibration behavior of the heat transfer tube 2 and the vibration behavior of the heat transfer promotion plate 6 are deviated from each other.

Therefore, the present invention intends to provide a heat transfer promotion plate positioning device for a helical coil heat exchanger that can match the vibration behavior of the heat transfer tube and the heat transfer promotion plate and improve the earthquake resistance. is there.

[Means for Solving the Problems] In order to solve the above problems, the present invention arranges helical coil heat transfer tubes in layers outside the inner cylinder, and promotes heat transfer between the helical coil heat transfer tubes in each layer. In the heat transfer promotion plate positioning device of the helical coil heat exchanger in which the plate is inserted and the heat transfer promotion plate is positioned by the spacer fittings which are fixed to the helical coil heat transfer tube, the heat transfer promotion plate positioning device holds the heat transfer tube in each layer. The spacer fitting and the clearance adjusting bolt screwed to the spacer fitting so as to press one end against the outer surface of the heat transfer promoting plate located inside the heat transfer tube.

[Operation] If the spacer fitting is assembled to the heat transfer tube with the clearance adjusting bolt retracted outward in the radial direction of the heat exchanger, the required clearance for inserting the heat transfer promotion plate between the layers of the heat transfer tube. Is formed. If the clearance adjusting bolt is moved inward and pressed against the heat transfer promoting plate after the heat transfer promoting plate is inserted between the layers of the heat transfer tube, the gap between the heat transfer promoting plate and the heat transfer tube can be eliminated. This makes it possible to match the vibration behaviors of both.

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

FIG. 1 shows an embodiment of the present invention. Like the one shown in FIG. 2, the heat transfer tubes 2 are sequentially arranged in layers on the outer side of the inner cylinder 1, and the heat transfer tubes 2 are provided between the layers. In the helical coil heat exchanger in which the heat transfer promotion plates 6 are inserted and arranged, the heat transfer promotion plates 6 are positioned in the radial direction at the circumferentially required intervals of the heat transfer tubes 2 of the respective layers. The positioning device 10 is used.

The positioning device 10 of the present invention is a spacer fitting having two fitting grooves 11a inside so as to fit into several turns (two turns in this embodiment) of the heat transfer tube 2 positioned vertically in each layer. 11 and a wedge-block-shaped spacer fixing metal fitting 12 that is located between the heat transfer tubes 2 located above and below and is tapered inward so that both upper and lower surfaces contact the heat transfer tubes 2 located above and below. A spacer fixing bolt 13 for tightening the spacer fixing member 12 and the spacer fixing member 11 to fix the spacer fixing member 12 to the heat transfer tube 2, and a spacer fixing bolt provided at a lower end portion of the spacer fixing member 11 which is out of the fitting groove 11a. Screw hole 1
4, and a clearance adjusting bolt 15 screwed so that its head portion 15a faces inward in the radial direction, and further,
An operation jig (not shown) such as a square hole for inserting the operation jig (not shown) into the tip of the screw portion of the clearance adjusting bolt 15 so that the bolt 15 can be rotated.
Is provided.

When positioning the heat transfer promoting plate 6 when assembling the helical coil heat exchanger using the positioning device 10 having the above-described configuration, first, the heat transfer tubes 2 of each layer to be arranged outside the inner cylinder 1 are to be arranged. The positioning device 10 of the present invention is assembled at the required position of. In this case, as shown in FIG. 1, the fitting groove 11a of the spacer fitting 11 is fitted to the outer side of the heat transfer tube 2 located above and below, and the spacer fixing fitting 12 is brought into contact with the inner side of the upper and lower heat transfer tubes 2. Then, the spacer fittings 11 and 12 are held by the heat transfer tube 2 with the spacer fixing bolts 13. At this time, the clearance adjustment bolt
The head 15a is positioned so that the head portion 15a does not protrude inward in the radial direction more than necessary. Since the heat transfer promotion plate 6 is not arranged in the inner peripheral part of the heat transfer tube 2 of the first layer (innermost layer) arranged on the outer periphery of the inner cylinder 1, the positioning device 10 of the present invention is assembled. Although it is not necessary to place it, the spacer fitting 11 and the spacer fixing fitting 12 are attached to the heat transfer tube 2 as shown in FIG. Is used as a positioning stopper for the heat transfer promotion plate 6.

When the heat transfer tube 2 of the first layer is arranged on the outer circumference of the inner cylinder 1, the heat transfer tube 2 of the second layer with the main positioning device 10 is arranged outside thereof. In this case, the bolt 15 for adjusting the clearance of the main positioning device 10 assembled to the heat transfer tube 2 of the second layer is
Since the head portion 15a is positioned so as not to project inward as described above, the heat transfer promotion plate 6 is inserted between the heat transfer tube 2 of the first layer and the heat transfer tube 2 of the second layer. Therefore, the necessary clearance C is formed. Next, using this clearance C, the heat transfer promotion plate 6 is inserted and set between the heat transfer tubes 2 of the first and second layers. Then, the bolt 15 is moved inward by inserting an operating jig into the operating hole 16 and turning the bolt, and the head 15a of the bolt 15 is moved.
Is pressed against the outer surface of the heat transfer promotion plate 6 as indicated by the chain line. Thereby, the clearance between the heat transfer promotion plate 6 and the main positioning device 10 can be adjusted to position the heat transfer promotion plate 6 in the radial direction, and at the same time, between the heat transfer promotion plate 6 and the positioning device 10. The gap G can be eliminated,
The vibration of the heat transfer promotion plate 6 does not occur.

As described above, the first-layer heat transfer tube 2 and the second-layer heat transfer tube 2
After inserting the heat transfer promotion plate 6 between the
As shown by the chain double-dashed line, the third-layer heat transfer tube 2 is disposed outside the first-layer heat transfer tube 2 in the same manner as described above, and the third-layer heat transfer tube 2 is provided between the second-layer and third-layer heat transfer tubes 2. After inserting the heat accelerating plate 6, the bolts 15 of the positioning device 10 attached to the heat transfer tube 2 of the third layer are operated to position the heat accelerating plate 6, and thereafter the same procedure is repeated.

In this way, the heat transfer promotion plate 6 inserted between the layers of the heat transfer tube 2 can be positioned without a gap by the clearance adjusting bolts 15 of the positioning device 10, so that the vibration behavior of the heat transfer tube 2 is reduced. The vibration behavior of the heat transfer promotion plate 6 can be made to coincide with each other, whereby the earthquake resistance can be improved.

In the above embodiment, the operation hole 16 such as a square hole is provided as the rotation operation portion at the tip position of the screw portion for rotating the clearance adjusting bolt 15, but the operation hole 16 is used instead. In addition, a prism-shaped projection may be provided as a rotary operation part, or the head of the bolt 15 may be omitted to replace it with an ordinary threaded rod, and otherwise within the scope of the present invention. It goes without saying that various changes can be made in.

[Advantage of the Invention] As described above, according to the heat transfer promotion plate positioning device for the helical coil heat exchanger of the present invention, the clearance adjusting bolt is screwed to the spacer fitting held in the heat transfer tube of each layer. With this configuration, the clearance adjustment bolts are retracted when the heat transfer promotion plate is inserted, so that when the heat transfer promotion plate is inserted between the heat transfer tubes of each layer, the necessary clearance is formed. Is easy and
Further, the heat transfer promotion plate can be positioned by inserting the heat transfer promotion plate and then pushing the clearance adjusting bolt and pressing it against the heat transfer promotion plate. Moreover, at the same time as positioning the heat transfer promotion plate. It is possible to eliminate the gap between the heat transfer promotion plate and the spacer fitting, to match the vibration behavior of the heat transfer tube and the heat transfer promotion plate, and to improve the earthquake resistance of the heat exchanger. Exert the effect.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a heat transfer promotion plate positioning device for a helical coil heat exchanger of the present invention, and FIG. 2 is a partially cutaway perspective view showing an example of a helical coil heat exchanger, FIG. 3 is a partially enlarged view of FIG. 2 showing a conventional positioning method of the heat transfer promotion plate. DESCRIPTION OF SYMBOLS 1 ... Inner cylinder, 2 ... Helical coil heat transfer tube, 6 ... Heat transfer promotion plate, 11 ... Spacer metal fittings, 12 ... Spacer fixing metal fittings, 15 ... Clearance adjusting bolts, 16 ... Operation hole (rotating operation part).

Claims (1)

[Scope of utility model registration request] 1. Helical coil heat transfer tubes are arranged in layers outside the inner cylinder, and a heat transfer promoting plate is inserted between the helical coil heat transfer tubes of each layer, and a spacer fitting is fixed to the helical coil heat transfer tubes. In a heat transfer promotion plate positioning device for a helical coil type heat exchanger configured to position the heat transfer promotion plate, spacer metal fittings to be held in the heat transfer tubes of each layer and heat transfer promotion plates located inside the heat transfer tubes are provided. A heat transfer promotion plate positioning device for a helical coil heat exchanger, comprising: a clearance adjusting bolt screwed to the spacer fitting so that one end is pressed against the outer surface.