JPS62270883A - Piping support structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a support structure for piping, and is particularly applicable to parts where leakage from penetration parts needs to be suppressed, particularly in gas coolers. The present invention relates to a suitable pipe support structure regarding a heat exchanger tube support structure.

[Conventional technology]

A conventional example of a support structure for heat transfer tubes in a gas-cooled heat exchanger in which a plurality of heat transfer tubes branched from a header are arranged on a cooling duct wall will be explained with reference to FIGS. 3 and 4.

3 and 4 show a plurality of heat exchanger tubes 1 and a cylindrical sleeve 2.
This shows an example of a structure in which a cylindrical sleeve 2 is attached to a heat exchanger tube 1 and inserted into an oblong hole 4 provided in a support plate 3 to ensure the amount of movement of the tube. It has become.

The oblong hole 4 has a moving space 5 that covers the amount of change in the heat exchanger tube 1.

Due to the displacement of the heat exchanger tube 1, the cylindrical sleeve 2 also moved along with the heat exchanger tube 1 in the movement space 5 within the oblong hole 4. However, no consideration was given to the leakage of cooling gas from the movement space of the heat exchanger tubes.

In addition, related technologies include, for example, Utility Model Application Publication No. 59-1
There is No. 44385.

[Problem that the invention seeks to solve]

Generally, in a gas-cooled heat exchanger, due to thermal expansion in the axial direction of the header, the heat transfer tubes protruding from the axial direction of the header undergo dimensional displacement in the axial direction due to thermal expansion. In order to prevent the support parts that support the heat exchanger tubes from interfering with each other, elongated holes are provided in the support parts in the movement direction due to the displacement of the heat exchanger tubes.

For this reason, the elongated hole creates a gap except for the heat transfer tube that passes through it, and because this gap is large, a large amount of gas escapes through the gap and bypasses through the cooling duct wall, resulting in a problem of lower cooling efficiency. Ta. Furthermore, in the conventional example described above, it is difficult to precisely match the manufacturing precision of the heat exchanger tubes and the installation tolerance of the long holes drilled in the support plate.
Processing such as thinning the cylindrical sleeve to suit individual dimensions has occurred.

For this reason, there was a problem in that the assembly work was complicated.

An object of the present invention is to suppress the outflow of gas from a cooling duct wall piping penetration part, and to be suitable for piping support of a gas cooling heat exchanger, which is easy to construct at the time of one assembly.

The object of the present invention is to provide a piping support structure.

[Means for solving problems]

The above purpose is to install a sliding plate attached to the cylindrical sleeve between the heat exchanger tube, the cylindrical sleeve that attaches to the heat exchanger tube, and the support plate that supports the heat exchanger tube, and tighten the space with bolts to the support plate. This is achieved by attaching a sliding plate to cover an oblong hole that passes directly through the heat exchanger tube penetration portion of the support plate. In addition, even if the oval holes on the support plate are made to a size that takes into account the installation tolerance of the piping, the holes in the support plate for attaching bolts can be made to fit the dimensions of the electric heating tube. Since the sliding plate always covers the oblong hole in the support plate, ease of construction is also achieved.

[Effect]

At the heat exchanger tube penetration part of the cooling duct, the heat exchanger tube moves due to the axial thermal expansion of the header, so an oval hole is provided in the cooling duct support plate to accommodate the amount of movement of the heat exchanger tube passing through. . The heat exchanger tube moves inside this oval hole,
Contact between the hole and the heat transfer tube can cause damage, so a cylindrical sleeve is attached to the heat transfer tube to avoid direct contact with the heat transfer tube. Even if this oval hole passes through the support plate, a plate is attached to the heat transfer tube so that the inside and outside of the cooling duct do not communicate. It acts like covering a hole. In order for this plate to always function as a cover for the oval hole, the cooling duct and the plate are connected with bolts, but a certain gap should be left between the plate and the cooling duct so that it can move together with the heat transfer tubes. so that you can set it with
Tighten the bolts with a collar. This makes it possible for the plate to move with the heat transfer tube in a uniform space, and even if cooling gas is flowing inside the cooling duct, only a small amount of flow leaks out from the oval hole. The cooling efficiency of the heat tube can be improved.

Furthermore, by connecting the plates with bolts, assembly of the support plate becomes easier.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

1 and 2 show a support structure for a gas cooler heat exchanger tube according to the present invention. In this figure, a cylindrical sleeve 2 is attached to the support portion corresponding to the pipe penetration position of the heat exchanger tube 1, and a sliding plate 5 is attached to the cylindrical sleeve 2. The sliding plate 6 is provided with at least two oval bolt holes 7a and 7b. These oval holes 7a and 7b for bolts have a length sufficient to allow the amount of movement of the heat exchanger tube 1 due to heat transfer.6 The sliding plate 6 is attached in contact with the support plate 3. There is. Two bolts 8a and 8b are provided on the support plate 3 on one side of the center of the oval hole 4 or at the center in the longitudinal direction of the oval. The figure shows an example where bolts 8a and 8b are provided on one side in the longitudinal direction.
from the position where it penetrates the support plate 3, the positioning collar 9
8 and 9b are attached to the outside of bolts 8a and 8b.

The positioning collars 9a and 9b pass through the oblong bolt holes 7a and 7b of the sliding plate 6 and protrude slightly from the sliding plate 6. Washers 10 are attached to the positioning collars 9a and 9b.
a and 10b and nuts lla and llb, and are fixed to the support plate 3. At this time, the gaps between the positioning collars 9a and 9b and the oval bolt holes 7a and 7b are kept small, and the sliding plate 6 can freely move in a predetermined direction.

The heat exchanger tube 1 moves with the heat movement in the axial direction of the header, and moves inside the oval hole 4 provided in the support plate 3. At this time, as the heat exchanger tube 1 moves, the sliding plate 6 moves. Since it is attached to move together with the heat tube, it moves on the support plate 3 along the oval bolt holes 7a and 7b into which the positioning collars 98 and 9b are inserted.

According to this embodiment, the opening of the oval hole provided in the support plate for pipe movement is always covered even if the pipe is moved by the sliding plate, so that it can be used for cooling heat transfer tubes. Since it is possible to prevent the formation of a bypass flow path through which the gas leaks out from here and flows to other openings, this has the effect of improving the cooling efficiency of the heat exchanger tubes of the gas cooler. Further, the through holes for attaching bolts for holding the space between the support plate and the sliding plate at a constant level also have the effect of preventing leakage by using positioning collars, washers, and nuts.

FIGS. 5 and 6 show another embodiment of the present invention.

The difference from FIGS. 1 and 2 is that the sliding plate 6 has rounded parts 13 at the four corners, and sliding temporary presses 1 are provided on both sides of the sliding plate 6.
2a and 12b are attached to the support plate 3 by, for example, welding. The sliding temporary presses 12a and 12b are attached to the sliding plate 6.
It is installed with a uniform space. When the heat exchanger tube 1 is displaced due to thermal expansion in the axial direction of the header, the sliding plate 6 also follows.

The support plate 3 is pressed by the sliding temporary presses 12a and 12b,
The sliding plate 6 is moved while keeping the space constant.

According to this embodiment, since the size of the sliding plate can be reduced, a plurality of heat exchanger tubes can be mounted more closely and evenly.
This has the effect of further reducing the size of the gas cooler. In addition, if the heat transfer tubes are attached to the cooling duct at the same position, it is possible to lengthen the sliding temporary hold, so multiple sliding plates can be held at the same time, making it easier to assemble. This has the effect of making construction even easier. Furthermore, since the structure is simple, there is also an economical effect.

[Effect of idea]

According to the present invention, the support structure for the piping of the penetration part that has a displacement amount due to heat transfer is a sliding plate that is attached with bolts by one positioning collar to a support plate that has an opening hole that secures the amount of heat transfer of the piping. By following the piping while always maintaining a constant space, it has the function of a lid, thereby suppressing leakage from the piping penetration part. In addition, the bolts that guide the sliding plate can be blocked from passing through the holes from the support plate using the positioning collar, washer, and nut. As a result, leakage of coolant from the pipe penetration portion can be suppressed, which has the effect of improving cooling efficiency. Furthermore, since the cooling efficiency can be improved, the equipment for sending the coolant can be made smaller, which has the effect of reducing equipment costs. Furthermore, because the support plate through which the piping passes and the sliding plate to which the piping is directly attached are separated, it is sometimes difficult to attach the piping to the support plate.

Even if there is a large installation error on the piping side, if the oval holes in the support plate are made larger, the bolt mounting holes can be machined to match the actual ones, making the construction easier.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a pipe support structure according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line T-1 in FIG. 1, FIG. 3 is a front view showing a conventional pipe support structure, and FIG. The figures are a cross-sectional view taken along the line ■--■ in FIG. 3, FIG. 5 is a front view showing a pipe support structure of another embodiment, and FIG. 6 is a cross-sectional view taken along the line mm--m in FIG.

Claims (1)

[Claims] 1. In a pipe support part consisting of a pipe, a pipe penetration part, and a support structure for the pipe, the support plate of the penetration part has an opening that allows displacement of the pipe, a sliding plate that moves along with the pipe, and a sliding plate. A piping support structure characterized in that at least one elongated hole is provided in the support plate and a positioning collar is provided on a bolt passing through the support plate and the sliding plate.