JPH0518580Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an exhaust pipe device for a combustor that uses gas, kerosene, etc. as fuel.

BACKGROUND ART Conventionally, as shown in FIG. 2, this type of exhaust pipe device connects an inner exhaust pipe 7 on the combustor 3 side to an outer exhaust pipe 6 via a connecting part 5 with an O-ring 8 interposed therebetween. Exhaust air was to be exhausted outdoors through an outer pipe 6 and an air supply/exhaust pipe 1. Note that 2 is an air supply pipe, and 4 is a wall surface. This device uses a small current flowing between the inner tube 7 and the outer tube 6 as a connection detection means.

Problems to be Solved by the Invention In the above structure, since the outer tube 6 and the inner tube 7 of the connection part 5 are electrically insulated by the O-ring 8, a low voltage is generated between the inner tube and the outer tube. When detecting a disconnection of the exhaust pipe (inner pipe) by applying a current, there is a problem in that it is not possible to reliably detect the disconnection of the exhaust pipe (inner pipe).

Means for Solving the Problems The present invention has been made to eliminate the above-mentioned drawbacks, and is provided with a protrusion that contacts the inner tube at the connecting portion of the outer tube.

Function: The outer tube 6 is electrically connected to the inner tube 7 via the protrusion 9, and the O-ring 8 securely holds the connection between the two.

Embodiment An embodiment of the present invention will be described below with reference to FIG. 1, with only the differences from FIG. 2.

Reference numeral 9 denotes a protrusion that comes into contact with the inner exhaust pipe 7 and is provided at the connection portion 5 of the outer exhaust pipe 6. Furthermore, 1
0 is the collar of the inner tube 7.

Next, the operation of this embodiment having the above configuration will be explained.

When detecting dislodgement of the exhaust pipe (inner pipe) by passing a minute current between the inner pipe 7 and the outer pipe 6, the protrusion 9 provided on the outer pipe 6 and the inner pipe 7 reliably come into contact to cause the current to flow.

Therefore, highly reliable exhaust pipe (inner pipe) disconnection detection can be achieved.

Effects of the invention As described above, according to the invention, the protrusion provided on the connecting part of the outer pipe makes sure to contact the inner pipe, allowing current to flow more accurately and reliably, and highly reliable detection of exhaust pipe disconnection. can.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part of a combustor exhaust pipe device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional side view of the same main part in the related art. 3... Combustor, 5... Connection section, 6... Outer pipe, 7
...Inner pipe, 8...O ring, 9...Protrusion.

Claims (1)

[Scope of utility model registration request] The inner exhaust pipe 7 on the combustor 3 side is inserted into the outer exhaust pipe 6, and an O-ring 8 is interposed in the connecting part 5, and the tip of the outer pipe 6 is opened outdoors, and the inner pipe 7 and In a combustor exhaust pipe device that serves as a connection detection means by passing a minute current through the outer tube 6, a protrusion 9 that contacts the inner tube 7 is provided at the connecting portion 5 of the outer tube 6, and the inner tube 7 is connected to the inner tube 7 through the protrusion 9. An exhaust pipe device for a combustor, characterized in that an outer pipe 6 is electrically connected.