JPS5812012Y2 - Mitsupei Gatanenshiyoukino Heikikansetzokubu - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the structure of the connection part with the exhaust pipe of a closed combustor.

FIG. 1 shows the structure of a conventional connection part.

In this figure, 1 is a wall of a closed type combustor, and 2 is a hole in the wall 1, the diameter of which is slightly larger than the outer diameter of the exhaust pipe that passes through this hole.

3 is a presser foot that has a hole with the same diameter as hole 2, and has a hole with a constant width around it, and a stepped part concentrically with a depth equal to the width of g. It is attached to the wall 1 of the.

4 is an O-ring made of a heat-resistant material and whose inner diameter is slightly smaller than the outer diameter of the exhaust pipe and fitted between the wall 1 and the stepped part of the presser foot 3; 5 is the exhaust pipe; and 6 is the exhaust pipe 5. The bulge part is made to prevent the exhaust pipe 5 from entering too deeply into the combustor.

Then, when the presser foot 3 is attached to the wall 1 of the combustor, and the O-ring 4 is inserted between the two, the exhaust pipe 5 is pushed in. The O-ring 4 is expanded by the exhaust pipe 5, and its outer periphery is covered with the presser foot. 3
Since it is in contact with the wall of the stepped section, it serves as a packing.

However, in this case, it is difficult to say that the contact between the O-ring 4 and the wall 1 is perfect, and depending on the way the presser foot 3 is attached to the wall 1, there may be a gap between the two, so the combustion exhaust gas may leak between the wall 1 and the presser foot. There was a leak between 3.

This invention aims to eliminate the above-mentioned drawbacks.

The exhaust pipe connection part of the closed type combustor according to this invention will be explained below with reference to the drawings. In Fig. 2, the combustor wall 1. The hole 2, O-ring 4, and bulge 6 are the same as those shown in FIG.

7 is a step having a constant width along the periphery of the hole 2 formed in the wall 1 of the combustor, and is created concentrically with the hole 2 toward the inside of the combustor with a width equal to g and a depth; is an annular flat plate presser foot having a hole of the same size as hole 2, and is attached to wall 1 from the outside so that this hole and hole 2 overlap.

The O-ring 4 is fitted between the stepped portion 7 and the presser foot 8.

Since the exhaust pipe connection part of the closed type combustor according to this invention is constructed as described above, when the exhaust pipe 5 is pressed down, the O-ring 4 is expanded and its outer periphery comes into contact with the peripheral wall of the step-down part 70, so that the inside Since the periphery contacts the exhaust pipe 5 and prevents the leakage of combustion exhaust gas, even if there is a gap between the wall 1 and the presser foot 8, the exhaust gas will not leak.

As described above, the exhaust pipe connection part of a closed type combustor according to this invention requires almost the same amount of work as the conventional one, but completely prevents exhaust gas leakage.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the structure of a conventional connection part, and FIG. 2 is a sectional view showing the structure of an exhaust pipe connection part of a sealed combustor according to this invention. In the drawings, the same reference numerals indicate the same or corresponding parts; 1 is the wall of the combustor, 2 is the hole, 4 is the O-ring, 5 is the exhaust pipe, 7 is the step-down part, and 8 is the presser foot.

Claims (1)

[Scope of Claim for Utility Model Registration] A hole with a diameter slightly larger than the outside diameter of the exhaust pipe is made, and a step with a constant width and a depth approximately equal to the width is formed concentrically inward along the circumference of the hole. An annular flat plate presser is attached to the combustor wall in such a way that the wall of the closed type combustor has a hole of the same size as the above-mentioned hole, and the hole overlaps the hole in the above-mentioned wall and covers the stepped part. An O-ring made of a heat-resistant material is fitted between the stepped part and the presser foot and has an inner diameter slightly smaller than the outer diameter of the exhaust pipe. The exhaust pipe connection part of a closed combustor that maintains airtightness between the exhaust pipes.