JP2552724Y2 - Electrode insulator mounting device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode insulator mounting apparatus for holding a flame rod for detecting a flame and an ignition heater in a combustor using gasified petroleum gas or the like as a fuel.

[0002]

2. Description of the Related Art A conventional electrode insulator mounting apparatus used in such a combustor will be described with reference to FIGS.

[0003] In the drawing, reference numeral 1 denotes an ignition heater for promoting ignition. The ignition heater 1 generates a heat when energized and ignites a fuel gas such as oil vaporized gas, and a rectangular parallelepiped holding the heater electrode 1a. And a round insulator 1c provided at both ends of the holding portion 1b. Reference numeral 2 denotes a frame rod for detecting a flame (not shown). This frame rod 2
Are a frame electrode 2a for detecting a flame, a holding portion 2b made of a square insulator having a predetermined thickness for holding the frame electrode 2a, and round insulators 2c provided at both ends of the holding portion 2b. It is composed of Reference numeral 6 denotes a box-shaped electrode fixture having an open bottom surface. The electrode fixture 6 has a U for holding the round insulator 1b of the ignition heater 1 and the round insulator of the frame rod 2 on both sides in the longitudinal direction. Cut 6a, 6
a is provided respectively. Reference numeral 7 denotes an electrode fixture below a flat fixing surface 7a. Reference numeral 5 denotes a fixing device such as a screw. The fixing device 5 fixes the ignition heater 1 and the frame rod 2 set on the U-cut 6a on the electrode fixing device 6 as shown in FIG. I have.

[0004]

In the above-described electrode insulator mounting apparatus, the rectangular holding portion 2b of the frame rod 2 has an upper electrode fixing member 6 and an electrode fixing member as compared with the rectangular parallelepiped holding portion 1b of the ignition heater 1. The contact surface with the lower part 7 is small and the stability is poor. Also, the gap 8 between the frame rod 2 and the upper electrode fixture 6, and the U-cut 6a and the round insulator 2 of the frame rod 2
The gap (not shown) between the frame rod 2 and the frame rod 2 is required as an allowable fitting gap in manufacturing, so that the frame rod 2 is loosened by the dimensional difference at the time of mounting, and eventually a flame to be detected (not shown).
There is a problem that the relative position between the frame and the frame electrode 2a varies, making it impossible to accurately detect a flame (not shown).

An object of the present invention is to provide an electrode insulator mounting apparatus which does not cause the above-mentioned problems even when such a frame rod is used.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention sets the frame rod holding portion to the U-cut on the electrode fixture with the corner portion of the electrode portion facing upward, and the electrode facing the corner portion. Holding holes are respectively provided on the upper surface and side surfaces of the fixture, and holding holes are also provided below the electrode fixture.

[0007]

A holding hole is provided on the upper surface and a side surface of the electrode fixture opposite to the corner of the holding portion of the frame rod, and a holding hole is provided below the electrode fixture, so that the corner of the holding portion of the frame rod is provided. The portion and the holding holes are engaged without any gap, so that the frame rod does not rattle.

Accordingly, since the relative position between the flame and the frame rod does not vary, the flame can be accurately detected.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

The description of the parts described in the above conventional example is omitted.

In the drawing, reference numeral 3 denotes a box-shaped electrode fixture having an open lower surface. Reference numeral 3a denotes a U-shaped U cut provided on both side surfaces of the electrode fixture 3 in the longitudinal direction. The U cut 3 holds a round insulator 1c of the ignition heater 1 and a round insulator 2c of the frame rod 2. 2b is held with the corner 2d facing upward. Reference numerals 3b and 3c denote holding holes formed of square holes or round holes, which are respectively provided on the upper surface and the side surfaces of the electrode fixture 3 at positions facing the corners 2d of the holding portions 2b of the frame rod 2. Reference numeral 4 denotes a plate-shaped fixing surface 4a for fixing the ignition heater 1 and the frame rod 2 and a burner mounting portion 4b provided below the electrode fixture. The lower part 4 of the electrode fixture is also provided with a holding hole 4c at a portion facing the corner 2d of the holding portion 2b of the frame rod 2. The operation configured as described above will be described below.

With the corner 2d of the holding portion 2b of the ignition heater 1 and the frame rod 2 facing upward, the electrode fixture 3 is placed from above and sandwiched below the electrode fixture 4 from below and fixed with a fixture 5 such as a screw. Then, the corner 2d of the holding portion 2b of the frame rod 2 engages with the holding holes 3b, 3c of the electrode fixture 3 without any gap, and also engages with the holding hole 4c of the lower electrode fixture 4 without any gap. There is no backlash in the rod 2. Therefore, since the relative position between the flame (not shown) and the frame rod 2 does not vary, the flame (not shown) is accurately detected. Further, the positioning of the frame rod 2 becomes accurate, and the mounting workability is improved.

[0013]

As described above, according to the present invention, the frame rod is set with the corner of the holding portion facing upward, and the holding holes engaging with the corner are placed on the electrode fixture and below the electrode fixture. By providing and fixing the frame rod, the frame rod does not rattle and the position related to the flame does not vary.

Therefore, there is an effect that an electrode insulator mounting device in which the flame rod detects the flame accurately can be provided.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an electrode insulator mounting device according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of the electrode insulator mounting device according to the embodiment of the present invention;

FIG. 3 is an exploded perspective view of an electrode insulator mounting device showing a conventional example.

FIG. 4 is a cross-sectional view of a main part of an electrode insulator mounting device showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ignition heater 2 Flame rod 2a Frame power pole 2b Holder 2d Corner 3 On electrode fixture 3b Holder hole 3c Holder hole 4 Under electrode fixture 4c Holder hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A flame rod (2) having an ignition heater (1), a square holding portion (2b) made of an insulator for holding a frame electrode (2a), the ignition heater (1) and a frame rod.
In an electrode insulator mounting device provided with an electrode fixture upper part (3) for fixing (2) from above and an electrode fixture lower part (4) for fixing from below, a holding part (2b) for the frame rod (2) Holding holes (3) in the upper surface and side surfaces of the electrode fixture (3) facing the corners (2d) of
(b) and (3c) are provided, respectively, and a holding hole (4c) is also provided in a lower part (4) of the electrode fixture facing the corner part (2d).