JPS60194233A - Combustion device - Google Patents

Abstract

PURPOSE:To secure accuracy with respect to the attaching position of a sensor or the like appearing in the area of combustion by a method wherein the guide tube of the sensor or the like is constituted so as to be supported by two-point support to prevent the sensor from being attached inclinedly. CONSTITUTION:The guide tube 14, for mounting the sensor or the like for preventing imperfect combustion, is constituted so as to be supported by two places of a part 8a penetrating through a combustion tube and a supporting frame 12 arranged between the penetrating part and the penetrating section of a burner. The accuracy of relative mounting position of the sensor 13 is requested, however, the guide tube 14 for mounting the sensor 13 is supported by two places of the penetrating hole 8a of a mixing chamber cover 8 and the same hole 12b of a pressure equilibrating plate 12, therefore, the problem such as the inclined attachment of the sensor 13 or the like will never be caused and the accuracy of the attaching position of the sensor 13 may be improved remarkably.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a combustion device equipped with a guide tube for guiding a sensor, etc. for preventing incomplete combustion.

<Prior art> As a conventional combustion device, for example, Utility Model Publication No. 48-42354
As shown in the publication, there is one that is equipped with an ignition main guide that airtightly penetrates the combustion tube and is attached to the burner made of wire mesh disposed inside the combustion tube through a gap. . Alternatively, there is also known a sensor in which a sensor for preventing incomplete combustion in the burner section is attached via a guide tube for attaching the sensor.

In all of these, the guide member passes through a support frame (mixing chamber cover) connected to the mixing pipe of the burner and is fixed or elastically supported by the support frame, so that it faces into the combustion section. It will be done.

That is, the guide member is supported only by the through-mounting portion of the support frame and passes through the through hole provided in the burner with a gap, so it is supported only at one location of the support frame. The configuration is as follows.

Therefore, when the guide member is fixed to the support frame by spot explosion welding, the guide member may be fixed in an inclined state, or the guide member may be inclined due to the inclination of the mounting surface of the support frame. There may be problems such as the product being fixed in place.

If the guide member is tilted and fixed in this manner, for example, the accuracy of the positional relationship of the sensor within the burner is impaired. Also, for this reason, as the burner made of wire mesh or the like expands, the guide member comes into contact with the inner peripheral end surface of the burner through hole passing through the gap, making it impossible for the guide member to slide smoothly. This causes problems such as a heavy load being applied to the burner, causing deformation.

<Summary of the Invention> The present invention has been made in view of the above-mentioned circumstances, and in order to ensure the accuracy of the mounting position of sensors, etc. for preventing incomplete combustion, the guide tube for mounting sensors, etc. is attached to the combustion tube. The burner is supported at two locations: the penetrating portion of the burner, and a support frame disposed between the penetrating portion and the penetrating portion of the burner, thereby solving the above-mentioned conventional problems.

<Embodiments of the Invention> Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

In the figure, 1 is a cylindrical burner having a closed opening at one end and a large number of flame holes in a cylindrical peripheral wall, and 2 is the outer periphery of the burner 1 except for the opening at the other end, which becomes the combustion gas outlet 3. It is a combustion cylinder that covers the burner 1 with a space therebetween and forms a mixture passage 4 of air and fuel gas around the outer periphery of the burner 1.

The burner 1 has a cylindrical shape made of wire mesh.A spherical closing cap 5 is attached to the upper opening, and an annular cap 6 is fixed to the lower opening to form a frame. ing. Further, the lower opening of the combustion tube 2 is closed by the annular camp 6, and the mixing chamber cover 8 is provided at the upper part of the combustion tube 2 to form a mixing chamber 7'f! for fuel gas and air.
: formed, and the upper opening communicates with the throat (mixing tube) described later. A through hole 8a is provided at a predetermined location of the mixing chamber cover 8 constituting the top wall of the combustion cylinder 2, through which a guide pipe for attaching a sensor, which will be described later, is inserted.

11 is a spark plug protruding into the burner 1; 12 is a uniform supporting frame disposed above the closing cap 5 to partition the mixing chamber T and the mixture passage 4; A hole 12a for air-fuel mixture circulation is provided in the center of the pressure plate, and a through hole 12b through which a guide tube for mounting a sensor is supported is provided at a position approximately directly below the through hole 8a of the mixing chamber cover 8. It will be done.

On the other hand, 13 is a sensor installed inside the burner 1 to prevent incomplete combustion in the burner 1, and is made of a semiconductor whose resistance value changes in response to oxygen partial pressure within a specified temperature range. be. 14 is a guide tube for installing a sensor that guides the sensor 13 to be installed inside the burner 1;
The attachment is supported through the through hole 8a of the mixing chamber cover 8, and is supported through the through hole 12b of the pressure equalizing plate 12 separated by a predetermined distance from the through hole 8a. The through hole 5a of the closing cap 5 is
It penetrates with a gap via a ring waxer or the like and projects into the burner 1.

The mounting portion of the guide tube 14 will be described in more detail based on FIG. 2. A flange portion 14a that protrudes in the outer circumferential direction over the entire circumference is provided at a predetermined position of the guide tube 14, and the flange portion 14a and the mixing chamber cover are connected to each other. -8 The outer surface of the top wall is interposed between the packing 15 and the outer surface of the top wall is measured. Further, the through hole 12b of the pressure equalizing plate 12, which is disposed at a predetermined distance apart from the fixed portion in the axial direction of the guide tube 14, is inserted into the guide tube 1.
4 penetrates and is supported. At this time, since the inner diameter of the through hole 12b is formed to have approximately the same size as the outer diameter of the guide tube 14, movement of the guide tube 14 in the axial direction is allowed, but so-called lateral movement is prevented. Therefore, the guide tube 14 is supported also in this through hole 12b, and is supported at two places with the through hole 8a.

Next, the operation of such a combustion device will be explained.

The fuel gas ejected from the nozzle 10 is guided to the throat 9 from the suction port 9a. At this time, primary air necessary for combustion of the fuel is sucked into the throat 9 by the ejector action. The fuel gas ejected into the throat 9 mixes with this primary air. This mixture is further mixed in the mixing chamber 1, guided to the mixture passage 4, and subjected to combustion in the combustion section. Incomplete combustion is prevented by a sensor 13 that detects the combustion state in this combustion section.

Here, this sensor 13 requires precision in its mounting position, but according to the device of this embodiment, the sensor 13
The guide tube 14 for installation is supported at two points: the through hole 8a of the mixing chamber cover 8 and the through hole 12b of the pressure equalizing plate 12, so it is not supported at one point, such as the mixing chamber cover, as in the past. There is no problem such as the sensor 13 being mounted at an angle, and the accuracy of the mounting position of the sensor 13 is significantly improved.

In addition, in the device of this embodiment, the pressure equalizing plate used conventionally can be replaced without adding a new support frame as the second support member.
2, the pressure equalizing plate 12 is simply provided with a through hole 12b having approximately the same size as the outer diameter of the guide tube 14. Therefore, the number of parts increases and the manufacturing process becomes complicated. You can also get the effect of not having one.

Furthermore, since the mounting position accuracy of the guide tube 14 is improved, a gap of a predetermined width is secured between the inner circumferential end surface of the through hole 5a of the closing cap 5 and the guide tube 14, so that the guide tube 14 and the inside of the through hole 5a are secured. The same problem does not occur when sliding with the peripheral end surface. Therefore, no extra load is applied to the nozzle 1, and the burner 1 is not deformed not only during manufacturing but also during expansion when the burner 1 is red hot.

The following drawings show different embodiments of the attachment portion of the guide tube to the first support frame, and FIG. 3
4a, and a second flange part 34b is provided below the flange part 34a so as to form a groove of approximately the same size as the plate thickness of the mixing chamber cover 8, and both flange parts 34a, 3
4b shows the mixing chamber cover 8 fixed so as to sandwich the inner circumferential end of the through hole 8a.

FIG. 4 shows a structure in which the outside of the mixing chamber cover 8 and the flange portion 14a of the guide tube 14 similar to that of the first embodiment are fixed by explosive contact.

FIG. 5 shows a further different embodiment, in which a mounting plate 3 formed of an elastic material is installed in the groove of the guide tube 34 shown in FIG.
6 is attached to the mixing chamber cover 8 via the gasket 35 with the inner circumferential end of the mixing chamber cover 8 fitted. You can also get the effect of absorbing it with 36.

In addition, the packing 15 used in the first embodiment is as follows:
In addition to the sealing function, it also has the function of absorbing the inclination of the mounting surface or the inclination of the guide tube 14 during installation, and the gasket 35 of the fourth embodiment shown in FIG. The embodiment also has the function of absorbing errors in mounting dimensions, and can ensure even higher precision in mounting positional relationships.

Further, in this embodiment, a guide tube for mounting a sensor for preventing incomplete combustion has been described, but it is clear that the present invention is not limited to this.

<Effects of the Invention> As explained above, according to the present invention, the guide tube of the sensor, etc. is supported at two points, and the guide tube is prevented from being installed at an angle, so that the sensor installed temporarily in the combustion section can be easily installed. It is possible to ensure the accuracy of the mounting position relationship.

In addition, since the mounting position accuracy is increased, it is possible to ensure smooth sliding between the guide tube and the penetrating part of the burner, so no extra load is applied to the burner, etc., thus preventing deformation of the burner, etc. Effects can also be obtained.

[Brief explanation of drawings]

The drawing shows one embodiment of the combustion device according to the present invention, and shows a first embodiment of the combustion device according to the present invention.
The figure is the overall configuration, Figure 2 is a sectional view of the main parts, Figures 3 and 4.
5 and 5 are sectional views of essential parts showing different embodiments, respectively. 1...Burner 2...Combustion tube 5...Closing cap 8...Mixing chamber cover 88...Through hole 9...
・Mixing pipe 12... Equalizing plate 12b... Through hole 13
...Sensor 14...Guide tube 15.35...
・Patsukin 16.36...Mounting plate agent Masuo Oiwa (
2 others)

Claims (1)

[Claims] In a combustion device comprising a guide tube that is airtightly supported through a combustion tube and is attached to a burner disposed in the combustion tube through a gap, a combustion tube penetration portion and a burner penetration portion of the guide tube are provided. A combustion device characterized in that a support frame having a through hole having substantially the same diameter as the guide tube, through which the guide tube passes, is fixedly provided on an inner wall of the combustion cylinder between the guide tube and the guide tube.