JPH02545Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an inner pipe support device for concentrically supported double pipes.

[Technical background of the invention and its problems]

As shown in Fig. 1, the conventional support device for the inner pipe of a double pipe is such that an inner pipe 3 is welded to the inner surface of an outer pipe 1 via a circular plate support 2, and a hole is provided in the outer pipe 1. A leak detection electrode 4 for detecting liquid leaking from the inner tube 3 is embedded in the lever hole.

However, as a device for supporting the inner tube 3, a circular plate support 2 is welded to the inner surface of the outer tube 1 and the outer surface of the inner tube 3, so there is a risk of damaging both tubes and electrodes when repairing them. There are drawbacks such as not only the inner tube 3 and the support cannot be reused, but also the construction of the inner tube 3 and the support body requires time and effort.

Another disadvantage is that it is difficult to accurately detect the leakage location when detecting fluid leakage from the inner tube 3.

[Purpose of invention]

The present invention was developed to eliminate the above-mentioned drawbacks, and allows construction and repair of the inner pipe and support of double piping to be performed easily and reliably, and repair can be performed without using a welding machine. It is an object of the present invention to provide an inner pipe support device for double piping, which can further limit a leak detection location when detecting a leak.

[Summary of the idea]

That is, the present invention provides an inner pipe support device for double piping in which an inner pipe is inserted into an outer pipe connected to a plurality of pipes and supported concentrically via a partition plate, in which a pair of pipes are connected to each other at the joints of the plurality of pipes. A pair of semicircular partition plates that can be integrated into a disk shape with a connecting member are inserted between the opposing surfaces of the pair of flanges via an L-shaped annular packing. A double piping inner tube support device, characterized in that a sleeve-like packing is interposed between the center portion and the inner tube, and an electrode for detecting fluid leaking from the inner tube is provided on the partition plate. be.

[Example of idea]

Hereinafter, the double pipe inner pipe support device according to the present invention will be explained with reference to FIGS. 2 and 3.

Note that FIG. 3 is a plan view showing the direction of the arrow A-A' in FIG.

In FIG. 2, reference numerals 11 and 12 indicate outer tubes, and flanges 14 having a plurality of bolt holes 13 are attached to the outer tubes 11 and 12, respectively.

Each flange 14 is connected by passing a bolt 15 through the bolt hole 13 and tightening a nut 16.

An inner tube 17 is inserted into the outer tubes 11 and 12, and the inner tube 17 is sandwiched between a pair of upper and lower semicircular partition plates 18 and 19 via a sleeve-like packing 20, and the ends of the partition plates 18 and 19 are inserted into the outer tubes 11 and 12. The edges are supported by the outer tubes 11, 12 via L-shaped annular packings 21, 22.

The pair of partition plates 18 and 19 are integrated into a disk shape by screwing in a connecting member, for example, two embedded bolts 23.

It goes without saying that the two can be separated by removing the embedded bolt 23.

Further, the lower partition plate 19 is provided with a leakage detection electrode 24 for detecting fluid leakage from the inner tube 17.

Note that a stepped convex portion 25 is formed at the center of the outer peripheral surface of the pair of upper and lower partition plates 18 and 19, and a semicircular notch 26 is formed at the center.

As described above, the L-shaped annular packings 21 and 22 are pressed to the convex portion 25, and the sleeve-shaped packing 20 is pressed to the semicircular notch 26 to make a tight contact with them, thereby partitioning the outer tubes 11 and 12 and maintaining airtightness. are doing.

Therefore, when the above-mentioned apparatus is assembled by inserting the inner tube 17 into the outer tubes 11 and 12, it can be done, for example, as follows.

A sleeve-like packing 20 is inserted in advance on the outer peripheral surface of the inner tube 17, and the semicircular partition plate 1
8 and 19 are integrated by sandwiching the packing 20 and using the embedded bolt 23.

Then, both sides of the convex portions 25 of the partition plates 18 and 19 are
The bolts and nuts 15 and 16 may be tightened after the flanges 14 are brought together using the annular packing.

Moreover, when disassembling, the above-mentioned assembly may be reversed.

[Effect of idea]

According to the present invention, it is easy to assemble the inner tube 17 into the outer tubes 11 and 12, and it is also easy to disassemble it.

Furthermore, the outer and inner tubes can be easily repaired without using a welding machine, and the spool can be repaired only at the damaged location.

Furthermore, by providing the partition plate, it is possible to limit the locations where fluid leaks from the inner pipe and perform subdivision detection, thereby reducing repair costs.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional inner pipe support device for double piping, FIG. 2 is a sectional view showing an embodiment of the inner pipe support device for double piping according to the present invention, and FIG. FIG. 3 is a plan view showing the direction of the arrow A-A' in the figure. 1...Outer tube, 2...Support, 3...Inner tube, 4...
... Electrode, 11, 12 ... Outer tube, 13 ... Bolt hole, 14 ... Flange, 15 ... Bolt, 16 ...
... Nut, 17 ... Inner tube, 18, 19 ... Partition plate, 20 ... Sleeve-shaped packing, 21, 22
... L-shaped annular packing, 23 ... embedded bolt, 24 ... electrode, 25 ... convex part, 26 ... semicircular notch.

Claims (1)

[Claims for Utility Model Registration] (1) In an inner pipe support device for double piping, in which an inner pipe is inserted into an outer pipe connected to a plurality of pipes and supported concentrically via a partition plate, A pair of flanges is attached to the connecting part of the piping, and a pair of semicircular partition plates that can be integrated into a disk shape with a connecting member are inserted between the opposing surfaces of the pair of flanges via an L-shaped annular packing. and a sleeve-like packing is interposed between the central part of the partition plate and the inner pipe, and an electrode for detecting fluid leaking from the inner pipe is provided on the partition plate. inner tube support device. (2) The inner pipe support device for a double pipe according to claim 1, wherein the pair of partition plates are removably integrated with a connecting member made of embedded bolts.