JP2550881Y2 - Combustor flame holding structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for holding a flame tube made of heat-resistant glass used for a combustor for burning fuel such as oil or gas.

[0002]

2. Description of the Related Art A number of practical products have been manufactured using a heat-resistant glass as a flame tube and having a structure in which the burning state of a burner can be observed with the naked eye and a heat ray is radiated from a burning portion. Pyrex glass is generally used as the heat-resistant glass used for the flame tube. However, in order to use this Pyrex glass for a combustor with a high calorific value, a thicker plate is required. Crystallized glass (known by trade names such as Neoceram) has also been used.

[0003] In order to prevent the combustion gas generated by the burner from leaking out, packing is interposed between the end portion of the flame tube and the connection portion between the flame tube mounting member. However, when crystallized glass is used, Pyrex is used. Since a thinner plate can be used as compared with glass, heat-resistant glass may bite into the packing.

[0004]

[Problem to be Solved by the Invention] In order to prevent the end of a flame tube using thin heat-resistant glass from biting into the packing, it is necessary to suppress the packing made of a metal plate between the packing and the flame tube. A method of interposing and holding is conceivable. However, the end of the heat-resistant glass when processed into a flame tube is not as flat as a metal tube and is uneven, and the contact between the flame tube and the packing suppressor is often point contact, When the burner or the flame tube expands due to the heat of combustion when using the vessel, since the expansion differs depending on the material, there is a disadvantage that the contact portion between the flame tube and the packing holder emits a loud contact sound each time it expands and contracts.

[0005]

According to the present invention, in order to solve the above-mentioned problems, a flame tube 2 made of heat-resistant glass is provided above a burner 1, and an end of the flame tube 2 and a flame tube mounting member 3 are connected to each other. In the combustor in which packing 4 is interposed at the connecting portion of
A gasket 5 made of a metal plate is attached between the gasket 4 and the gasket 4, and the gasket 5 is provided with a heat-resistant coating on a contact portion with the flame tube 2.

As the structure of the packing holder 5, a bent part 6 is formed with the outer edge of the packing holder 5 facing the flame tube 2 side so that the contacted flame tube 2 and the packing holder 4 do not come off. is there.

[0007]

[Function] The function of the combustor is as follows: When fuel such as oil and gas is burned by the burner 1, the combustion flame, hot air and exhaust gas are
Burner 1, flame cylinder 2, flame cylinder mounting member 3 such as heat exchange chamber
Is to be heated.

[0008] When heated by the combustion heat, these components such as the burner 1 and the flame tube 2 expand. Between the two, causing a contact noise. In this invention, since the heat-resisting coating was applied to the packing suppressor 5, a remarkable noise-reducing effect of the contact sound was recognized.

Further, the flame tube 2 and the packing holder 5 are not fixed, but have a relationship in which the other is placed on one of them, and the flame tube 2 made of heat-resistant glass is very slippery.
For this reason, if the bent portion 6 is provided from the packing holder 5 toward the flame tube 2, the packing holder 5 does not come off from the end face of the flame tube 2, and the structure becomes very easy to manufacture. However, in such a structure, the strength of the packing suppressor 5 is increased, and the packing suppressor 6 is not attached to the end face of the flame tube 2, so that a contact sound is more likely to be generated. It is.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction will be described below with reference to the drawings showing an embodiment of an oil combustor. 1 is a burner for burning oil, 2 is a flame tube provided above the burner 1, and is made of crystallized glass such as neoceram. The heat-resisting glass is used, and the plate thickness is usually about 2 mm. Reference numeral 3 denotes a flame tube mounting member formed of a part of the heat exchanger 7, the burner 1, and the like, and reference numeral 4 denotes a packing used between the flame tube 2 and the flame tube mounting member 3 above and below the flame tube 2 to prevent combustion gas from leaking. It is for.

Reference numeral 5 denotes a packing restrainer formed of a metal plate for preventing the end of the flame tube 2 from biting into the packing 3, and is positioned so as to sandwich the packing 4 with the flame tube mounting member 3. I have. A heat-resistant paint 5a containing an inorganic fine-grained material or the like is applied to at least a portion of the packing holder 4 that is in contact with the flame tube 2, and the surface of the packing holder 4 is roughened.

Reference numeral 6 denotes a bent portion formed by bending the outer edge of the packing holder 5 toward the flame tube 2. When the packing holder 5 is placed on the end surface of the flame tube 2, it is folded even if the packing holder 5 slides. The bent portion 6 was locked on the end of the flame tube 2 and could not be removed. That is, when the gasket holder 5 is placed on the end face of the flame tube 2 and the gasket mounting part 3 is attached to the end face of the flame cylinder 2 from above the gasket holder 5 with the gasket 4 attached to the flame tube mounting part 3, Since the packing retainer 5 does not slip, it can be mounted very easily.

However, if the bending portion 6 is provided to facilitate manufacture, the strength of the packing suppressor 5 is increased and a contact sound is easily generated. However, even in this case, the heat-resistant paint can effectively reduce the contact sound. It is to prevent.

If the bent portion 6 is provided not in the entire periphery of the packing holder 5 but in a projecting shape at a plurality of places, the packing holder 5 can be extended from the end of the flame tube 2 with little increase in the strength of the packing holder 5. It is less likely to come off, and is effective in preventing the generation of contact noise.

Reference numeral 8 denotes a combustor frame housing the burner 1, the flame tube 2, the heat exchanger 7, and the like; 9, a constant oil level unit for supplying fuel to the burner 1; Since it is a blower and the flame tube 2 is made of heat-resistant glass,
The combustion state can be confirmed through the flame tube 2, and the combustion heat is also transmitted. Reference numeral 11 denotes an exhaust pipe for discharging hot air and exhaust gas passing through the heat exchanger 7 to the outside of the combustor frame 8 or the outside of the room.

[0016]

[Effects of the Invention] The present invention shows the above-described structure and operation. When the surface of the packing suppressor 5 which comes into contact with the flame tube 2 is heat-resistant coated, the inorganic fine particles contained in the paint are used. Since the surface is rough, even if the contact surface is displaced due to thermal expansion, there is an effect that it does not generate an annoying sound due to harsh contact and serves as a buffer.

Further, since the packing suppressor 5 requires only a simple process of applying heat-resistant coating, it hardly causes an increase in cost, and prevents generation of contact noise even when the bent portion 6 is provided to facilitate manufacture. Since the manufacturing process can be simplified, the cost can be reduced, and the structure is simple and effective.

[Brief description of the drawings]

FIG. 1 is an overall sectional view showing an example in which the present invention is applied to an oil combustor.

FIG. 2 is an enlarged view of a main part showing an example in which the present invention is applied to an oil combustor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Burner 2 Flame cylinder 3 Flame cylinder mounting member 4 Packing 5 Packing holding 6 Bending part

Claims (2)

(57) [Scope of request for utility model registration] 1. A combustor having a flame tube 2 made of heat-resistant glass above a burner 1 and a packing 4 interposed at a connection between an end portion of the flame tube 2 and a flame tube mounting member 3. Cylinder 2
A gas cylinder holding structure made of a metal plate is attached between the gasket and the gasket, and the gasket holding means is provided with a heat-resistant coating on a contact portion with the gas cylinder. 2. The flame cylinder holding structure for a combustor according to claim 1, wherein a bent portion is formed on an outer edge of the packing retainer toward the flame cylinder.