JPS6387530A - Ignition electrode device - Google Patents

Abstract

PURPOSE:To enable airtight mounting of an ignition electrode device to a combustion chamber and to ensure ignition, by a method wherein a pair of ignition plugs are inserted in a metal A, after the metal A is covered with a metal B, the two metals are integrally caulked and are adhered together with alumina cement to secure an ignition electrode device. CONSTITUTION:After an ignition plug 10b placed on a metal A1 is covered with a metal B5 and the two metals are caulked, the metals are secured to a screw part 23 of a burner side plate 20 through a packing 21 with a screw 22. Both end parts of a square flange part 11 of the porcelain of the ignition plug 10a on the plus side are formed to be circle in the cross section, and are partially narrowed, and a distance between the edge surfaces is increased. An electrode 12 on the plus side is inserted in a central part to be adhered with alumina cement. An ignition plug 10b on the minus side is also formed in a similar manner with the plug 10a, an electrode 15 on the minus side is inserted in its central part to adhere the electrode alumina cement and the like. This constitution enables holding airtightness between the burner side plate and the electrode device, and enables shortening of an overall length, resulting in compacting a device. Further, since the recessed part is securely adhered with alumina cement, deviation in a discharge distance is prevented from occurring to ensure ignition.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to the construction of an ignition electrode portion of a combustion device using gas or kerosene as a heat source.

2. Prior Art The conventional ignition electrode has an insulator 2 as shown in FIGS. 10 and 11.
The electrode 26 is adhesively fixed to the burner side plate 28 with alumina cement or the like, and the ignition electrode 2 whose discharge distance is secured by the electrode 26 is fixed to the burner side plate 28 with a fixing fitting 29.

Then, the fixing metal fitting 29 and the ignition electrode 27 are connected with the screw 3o.
was fixed to the burner side plate 28 with screws 31 via a fixing fitting 29 to which the ignition electrode 27 was fixed.

The fixture 29 is bent into a substantially U-shape, and the other side has an additional 9o0 bending process for attaching it to the burner. In FIG. 11, a hatched area 32 is a gap between the burner side plate 28 and the ignition electrode 27. This gap 32
Due to the firing process of the insulator 27, it is difficult to form a shape that fits airtightly into the mounting hole 33 of the burner side plate 28 due to large variations, and since the screws 30 and 31 are tightened at two locations, these The mounting hole 33 is made slightly thicker in order to absorb processing errors in the screw mounting hole.

Problems to be Solved by the Invention In recent years, devices that burn gas and kerosene have come to be required to perform high-load combustion, and as a result, the structure of the combustion chamber of the burner section itself has been required to be airtight. If you try to use the ignition electrode 27 shown in the conventional example under such a background, air may flow into the combustion chamber through the hatched area 32 shown in FIG. , and sometimes produced abnormal noises. In addition, since the ignition electrode 27 itself is large and the fixing metal fitting 29 itself is also large, it is necessary to provide a large space for installation in order to ensure spatial distance and surface distance for insulation purposes, making the product compact. Due to the demand for compactness, it has become necessary to make the ignition electrode 27 even more compact.

Furthermore, the discharge distance and the discharge position constituted by the electrodes 25 and 26 of the ignition electrode 27 are adjusted to the fixing metal fitting 2 as shown in the above configuration.
9, the ignition electrode 2 and the burner side plate 28, for example, when tightening the screw 30, the ignition electrode 27
There was a problem that ignition was not reliable due to instability due to the tendency of the ignition to lean to the right side.

The present invention solves these conventional problems and provides an ignition electrode device that is airtightly attached to a combustion chamber, is compact, and ensures reliable ignition.

Means for Solving the Problems In order to solve the above problems, the ignition electrode device of the present invention includes:
Metal fitting A with two holes slightly larger than the outer diameter of the tip of the insulator
Then, insert two spark plugs with electrodes adhesively fixed to an insulator having a square flange portion through the large hole, place the flange portion on the insulator, and cover the square flange of the insulator with a portion having a substantially rectangular cross section. In this way, metal fittings B having two holes slightly larger than the outer diameter of the rear end of the insulator through which the insulator is passed are stacked on each other in the approximately ■-shaped part, and the metal fitting A is caulked to form a structure.
This ignition electrode device is provided with a recess formed by the metal fittings A, metal fitting B, and a square flange of an insulator, and in which the metal fittings A, metal fitting B, and a spark plug are fixed by adhering alumina cement to the recess.

Function: The ignition electrode device of the present invention is constructed by placing two spark plugs having square flanges on the metal fitting A, and then overturning the metal fitting B, which has an approximately ■-shaped cross section, and then caulking the metal fittings A and B to form an integral body. Since the metal fittings A, metal fitting B and the spark plug were fixed by applying alumina cement to the recess formed by the metal fitting A, metal fitting B, and the square flange of the insulator of the spark plug, the discharge distance and discharge position of the spark plug were fixed. Since the metal fitting A does not go out of order and one side of the metal fitting A is flat, it is possible to maintain airtightness when installing it on one end of the burner.

EXAMPLE Hereinafter, an ignition electrode device according to an example of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of the ignition electrode device 16, and FIG. 2 is a front view of the ignition electrode device 16. Figure 1 shows the spark plug 1ob (1ob not shown) placed on the metal fitting A1 covered with the metal fitting B5 and caulked, and then
1 to the threaded portion 23 of the burner side plate 20 by screws 22. FIG. 2 is a front view of the same device as seen from the side of the metal fitting B6, and FIG. 1 shows the A-B-C-D-E-F cross section of FIG. 2.

FIG. 3 shows a sectional view of the metal fitting A1, and FIG. 4 is a plan view of the metal fitting A1. Two holes 2a and 2b into which the spark plugs 10a and 10b are inserted, two purling parts 3a and 3b for caulking the fittings A1 and B6, and the burner side plate 2.
One hole 4 for attachment to o is provided.

The details of the metal fitting B5 are as shown in FIGS. 5 and 6, where FIG. 5 is a sectional view and FIG. 6 is a plan view.

The metal fitting B6 is formed into a substantially square shape, and the top surface of the substantially low-shaped portion 6 has holes 8a and 8 for insertion of spark plugs 10a and 1ob.
Two holes 7a and 7b larger than the outer diameters of the burring portions 3a and 3b and one mounting hole 9 to the burner side plate 2o are provided on the flat surface 6a at both ends.

The details of the spark plug 10a on the ■ side are as shown in Fig. 7.
Both ends of the rectangular flange part 11 of the insulator have a circular cross section, a part of which is made thinner so that the distance between the edges is a dog, and the electrode 12 on the ■ side is inserted in the center and bonded with alumina cement or the like. There is. The leading end 13 and rear end 14 of the insulator 10 may have the same diameter or different diameters, but having the same diameter is more advantageous in processing.

The details of the O side spark plug 10b are as shown in FIG.
Both ends of the square flange part 11 of the insulator 1o have a circular cross section, and a part is processed to be thinner to increase the distance between the edges, and the O side electrode 15 is inserted in the center and bonded with alumina cement or the like. There is. The leading end 13 and rear end 14 of the insulator 10 may have the same diameter or different diameters, and it is more advantageous for processing to have the same diameter.

Figure 9 is a side view of the ignition electrode device, and the discharge distance is 4m/
It is caulked so that it is around m.

After inserting the spark plugs 10a and 10b into the holes 2a and 2b of the metal fitting A1 as shown in FIG. burring parts 3a, 3b
hole 7a of metal fitting B6.

7b, the burring portions 3a, 3b are caulked to ensure the discharge distance 17 of the spark plugs 10a, 10b.

The spark plug 10a is assembled by caulking the metal fittings A1 and B5.

10b, the burner side plate is attached to the threaded part 23 provided on the burner side plate 20 with a caulked part 18a which is caulked with the hole 7a facing the burring part 3a, and a screw 22 inserted into the overlapped part of the mounting holes 4 and 9. It is fixed at 2o.

Of course, the burring part 3a and the holes 7a and 3b and the holes 7b may be used for fixing. The mounting surface 20a of the ignition electrode device 16 on the burner side plate 20 is partially cut deeper to increase the distance between the burner side plate 20 and the exterior part (not shown). On the other hand, the burner side 20b of the burner side plate 2o
The space around the penetrating portions of the spark plugs 10a and 10b is counterbored to increase the spatial distance. The ability to caulk the metal fittings A1 and B5 and the spark plugs 10a and 10b depends on variations in the height and width of the approximately two parts 6 of the metal fitting B5, and variations in the thickness and mouth dimensions of the square flanged portion 11 of the insulator 10. Definitely spark plug 10a.

In order to compensate for the insufficiency of securing a discharge distance of 1Qb, as shown in FIG.
Recesses 19a and 19b constituted by 1 are provided, and alumina cement is adhered to the recesses 19a and 19b to securely fix the metal fittings A1 and metal fittings B6 and the spark plugs 10a and 1ob to the spark plugs 10a and 10b. This is to ensure a discharge distance 17 of .

Effects of the Invention As described above, the ignition electrode device of the present invention has the metal fitting A\
Insert a pair of spark plugs into the holder, cover the metal fitting B from above, and swage them together. Alumina cement is glued to the recess formed by the metal fittings A and B and the square flange of the insulator, and the ignition electrode device is attached. Since it is fixed, the following effects can be expected.

(1) Since one side of the metal fitting A is flat, airtightness with the burner side plate to which the ignition electrode device is attached can be maintained.

(2) Conventional insulator (in this example, total length 3 rs m/
m), the overall length can be shortened (to about 25 m/m 2 in this example), so the instrument can be made compact.

(3) The ignition electrode device can be constructed by fixing two insulators that are simpler in shape and require fewer processing steps than conventional insulators, resulting in cost reduction.

(4) Compared to the conventional method, the fittings for mounting on the bepana and the spark plug are integrated, so the number of man-hours required for installation can be reduced.

(5) Since the concave portion is adhesively fixed with alumina cement, there is no deviation in the discharge distance, and ignition can be ensured.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an ignition electrode device according to an embodiment of the present invention, Fig. 2 is a front view of the ignition electrode device, Fig. 3 is a sectional view of the metal fitting A, and Fig. 4 is a plan view of the metal fitting A. Figure 5 is a sectional view of the metal fitting B, Figure 6 is a plan view of the metal fitting B, Figure 7 is a front view of the ■ side spark plug, Figure 8 is a front view of the O side spark plug, Figure 9 is a side view of the ignition electrode device, Figure 10,
FIG. 11 shows a conventional ignition electrode attachment, showing a side view and a top view. 1...Bracket A, 2a, 2b...Hole for inserting the spark plug, 3a, 3b...Burring part (crimped part), 6...Bracket B, 6...
Omitted part, 7a, 7b... Hole, 10a, 1
0b...Spark plug, 1o...Insulator,
11... Square flange part of the insulator, 13...
... Tip of the insulator, 14 ... Rear end of the insulator, 1
e...Ignition electrode device. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 opening, 16 threads, crimping part caused by turning 2, 0 F 1 1-11 L 3 yu Do 4 and 6-metal fitting β O-omitted - "] part 7 units, 74- 1 bar link to the armor No. 5-
Needle - screw identification hanging hole δ q / θ mountain - [L, plug 11 - - insulator square type flange - / sound p / Z - 14 - insulator" Part to-g-111-1k, spark plug No. 80 I5--Weir II electric and Fig. 9 t6-,! , Fire Den Cry Asahi 1.7I7-・-
Figure 10A Figure 11

Claims (1)

[Claims] A square flange is formed by inserting two spark plugs with electrodes adhesively fixed to the insulator having a square flange part in the middle into a metal fitting A having two holes slightly larger than the outside diameter of the tip of the insulator, and passing the insulator through the large holes. The above-mentioned metal fitting B has two holes slightly larger than the outer diameter of the rear end of the insulator, through which the insulator is passed through the square flange of the insulator so as to cover the square flange of the insulator. The metal fittings A were caulked into one piece, a recess formed by the metal fittings A, metal fitting B, and the square flange of the insulator was provided, and alumina cement was adhered to the recess to fix the metal fittings A, metal fitting B, and the spark plug. Ignition electrode device.