JP2730482B2 - Oil burning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a petroleum combustion apparatus having a spray nozzle for spraying petroleum.

[0002]

2. Description of the Related Art The present inventor has previously provided an oil burning apparatus as shown in the sectional view of FIG. This will be described first. In the burner case 10, the spray nozzle 30 and the spray nozzle
A primary air cylinder 40 and a combustion cylinder 50 that concentrically surround 30 are provided. The oil sprayed from the spray nozzle 30 is supplied to the combustion cylinder 50 through a spray fuel receiving port 52 provided on a base end face 51 of the combustion cylinder 50.
And supplied for combustion. In addition, a part of the airflow introduced into the burner case 10 from the fan 20 is taken into the primary air cylinder 40 from the primary air intake 41 provided in the primary air cylinder 40, and together with the spray fuel from around the spray nozzle 30. It is supplied into the combustion cylinder 50. A part of the air flow introduced into the burner case 10 forms a swirling flow from a rotary blade portion 53 provided around a sprayed fuel receiving port 52 on a base end face 51 of the combustion cylinder 50 and enters the combustion cylinder 50. Supplied. The remaining airflow is also supplied into the combustion cylinder 50 from an air supply hole 54 provided in the side peripheral wall of the combustion cylinder 50. The primary air cylinder 40 is coupled to the back cover 10a of the burner case 10 at its proximal end with screws 91,
In addition, a front end edge 42 of the front half of the primary air cylinder 40 constricted in a cone shape is joined to an edge of the spray fuel receiving port 52 of the combustion cylinder 50. The combustion cylinder 50 is connected to the front plate 10b of the burner case 10 with a screw 92 at the tip end side. 70 is a flame detector and 80 is an igniter, which are fixed to the back cover 10a of the burner case 10, respectively.

[0003]

However, in the above apparatus, the primary air cylinder 40 and the combustion cylinder 50 are separately provided, and the primary air cylinder 40 is provided at the base end of the back cover of the burner case 10.
10a, and the combustion cylinder 50 has a burner case 10
To be attached to the front plate 10b of
Due to dimensional variations and mounting errors of parts and the like of each part of the device, a gap is opened in a surface to be joined between the leading end opening edge 42 of the primary air cylinder 40 and the spray fuel receiving port 52 edge of the combustion cylinder 50, Further, there is a disadvantage that the center line between the spray nozzle 30 and the combustion cylinder 50 is shifted. In addition, there has been a problem that the air velocity supplied from the rotary blade portion 53 into the combustion cylinder 50 is reduced, or the spraying of the rotary blade portion 53 is caused. On the other hand, the flow rate of the air supplied from the rotating blades 53 into the combustion cylinder 50 is determined by the opening area between the primary air intake 41 of the primary air cylinder 40 and the air supply hole 54 of the combustion cylinder 50. There was a disadvantage that the air flow supplied from 53 could not be set freely.

Accordingly, the present invention solves the above-mentioned drawbacks of the conventional apparatus, prevents poor combustion caused by variation in the relative position between the primary air cylinder and the combustion cylinder, and supplies the combustion air from the rotating blades into the combustion cylinder. An object of the present invention is to provide an oil combustion device having good combustion performance by allowing the air flow rate to be freely set.

[0005]

In order to achieve the above-mentioned object, the present invention provides an oil-fired combustion apparatus in which a spray nozzle and a spray nozzle are concentrically enclosed in a burner case and are introduced into the burner case. A primary air cylinder that takes a part of the airflow into the cylinder as primary air, and a combustion cylinder that receives and sprays fuel from the spray nozzle in front of the spray nozzle and the primary air cylinder, and performs combustion. The primary cylinder is attached to the back cover of the burner case at its base end, the combustion cylinder is attached to the front plate of the burner case at its tip, and the tip opening edge narrowed in a cone shape of the primary cylinder. A petroleum combustion device configured to join a spray fuel receiving port edge provided on a base end surface of the combustion cylinder, wherein an auxiliary air cylinder is provided, and the primary air cylinder is provided on an inner wall of the cylinder with respect to the auxiliary cylinder. And the combustion cylinder in advance By fixing and fixing, the integral unit in which the edge of the opening end of the primary air cylinder and the edge of the spray fuel receiving port of the base end surface of the combustion cylinder are joined in advance, and this unit is formed of the primary air cylinder. Attaching the unit by attaching to the burner case at the base end side and the tip end side of the combustion cylinder respectively, and providing a part of the air flow introduced into the burner case to the auxiliary combustion cylinder side peripheral surface It is characterized in that it is configured to be taken into the inside from the intake hole and to be introduced into the combustion cylinder from a rotary blade portion provided around the spray fuel receiving port on the base end face of the combustion cylinder.

[0006]

The primary air cylinder and the combustion cylinder are attached to the auxiliary air cylinder in advance and fixed to form a unit, thereby preventing the center line between the primary air cylinder and the combustion cylinder from being displaced, and opening the front end of the primary air cylinder. A gap is prevented from being generated at the joint surface between the edge and the edge of the spray fuel receiving port of the combustion cylinder. Also, just by aligning the center line between the spray nozzle and the primary air cylinder, the center line between the combustion cylinder and the spray nozzle is also adjusted at the same time, so that the spray nozzle accurately faces the center of the spray fuel receiving port of the combustion cylinder. Further, by changing and adjusting the opening area of the auxiliary air intake hole of the auxiliary air cylinder, the flow rate of the air taken into the auxiliary air cylinder and supplied from the rotary blade portion into the combustion cylinder can be freely changed.

[0007]

FIG. 1 is a sectional view of an oil combustion apparatus showing an embodiment of the present invention. FIG. 2 is a front view and a side view of a combustion cylinder of the oil combustion apparatus for explaining another embodiment of the present invention. FIG. 3 is a cross-sectional view of a main part for explaining still another embodiment of the present invention.

The primary air cylinder 40 and the combustion cylinder 50 to be provided in the burner case 10 are previously fixed to an auxiliary air cylinder 60 as a common fixing member, so that the auxiliary air cylinder 60 and the primary air cylinder 40 The burner case 10 is configured as a unit including the combustion tube 50, and the internal structure of the burner case 10 is configured by attaching the unit to the burner case 10. The primary air cylinder
Reference numeral 40 denotes a position closer to the base end than the cone-shaped constricted portion 43, and is fixed to the inner wall on the base end side of the auxiliary air cylinder 60 by spot welding or the like. Further, the combustion cylinder 50 is attached and fixed to the inner wall on the distal end side of the auxiliary air cylinder 60 at a position on the base end side by spot welding or the like. In addition, the front opening edge 42 of the cone-shaped constriction 43 of the primary air cylinder 40 and the edge of the spray fuel receiving port 52 on the base end face 51 of the combustion cylinder 50 are joined by spot welding or the like. Of course, in the unit configuration, the center line of the primary air cylinder 40 and the center line of the combustion cylinder 50 are aligned. The unit constructed in this manner is fixed to the back cover 10a of the burner case 10 with screws 91 at the base end side of the primary air cylinder 40. Also, the front plate 10 of the burner case 10
b. The combustion cylinder 50 does not need to be firmly attached and fixed by the screw 92 or the like as in the related art. The unit fixed integrally is screwed with a screw 91 at the primary air cylinder 40 part.
To the back cover 10a,
About 50, it may be enough to fit. Of course, the screws may be fixed.

The auxiliary air cylinder 60 is provided with a plurality of auxiliary air intake holes 61 on a side peripheral surface thereof. The opening area of the auxiliary air intake hole 61 can be changed and adjusted. For example, each auxiliary air intake hole 61 may be provided with an opening adjustment cover for changing the degree of opening, or a part of the plurality of auxiliary air intake holes 61 may be appropriately closed. Further, the opening degree of the auxiliary air intake hole 61 can be changed and adjusted by expanding or reducing the size of the auxiliary air intake hole 61 during a test operation or the like.

The spray nozzle 30 is a return type spray nozzle, and sprays only a part of the oil sent from the oil supply source to the spray nozzle 30 from the nozzle 30 as needed,
The rest is sprayed with a return pipe (not shown) without spraying.
It can be returned to the upstream side of 30. The nozzle holder 31 holding the spray nozzle 30 is formed integrally with the back cover 10a of the burner case 10. Nozzle holder 31
And the back cover 10a are integrally formed, so that the positional relationship and the orientation relationship between the spray nozzle 30 attached to the nozzle holder 31 and the back cover 10a are stabilized, so that the primary combustion cylinder of the unit attached to the back cover 10a is 40 or combustion cylinder 50 and spray nozzle 30
Is easily stabilized, and deviation is hard to occur. The general configuration other than the configuration of the unit using the auxiliary air cylinder 60 is substantially the same as the configuration of FIG. 4 described above.

A part of the air flow introduced into the burner case 10 from the fan 20 is taken into the primary air cylinder 40 from a primary air intake 41 provided in the primary air cylinder 40 and sprayed from around the spray nozzle 30. The fuel is supplied into the combustion cylinder 50 together with the fuel. A part of the air flow introduced into the burner case 10 is taken into the auxiliary air cylinder 60 through the auxiliary air intake hole 61, and the atomized fuel receiving port 52 of the base end face 51 of the combustion cylinder 50 is provided.
The air is supplied into the combustion cylinder 50 as a swirling flow from a rotating blade 53 provided around the combustion cylinder 50. The remaining airflow is also supplied into the combustion cylinder 50 from an air supply hole 54 provided in the side peripheral wall of the combustion cylinder 50. The spray fuel sprayed from the spray nozzle 30 into the combustion tube 50 is ignited and burned by an igniter 80, and the presence or absence of combustion is detected by a flame detector 70.

Another embodiment of the present invention will be described with reference to FIG. 2A is a front view of the combustion tube 50, and FIG. 2B is a side view of the combustion tube 50. In this example, the base end surface 51 of the combustion cylinder 50
A plurality of auxiliary air supply holes 55 are provided around the outer periphery of the rotary blade 53. By providing this auxiliary air supply hole 55, the combustion blade 50
Even if the flow velocity of the air blown into the inside decreases, the air is blown out and supplied perpendicular to the flame formed near the rotating blades 53, and the air flow forcibly mixes the fuel and air. , A good combustion state can be maintained. When the auxiliary air supply hole 55 is not provided, the air supply amount from the fan 20 is reduced as the combustion amount is reduced, so that the air flow velocity of the swirling flow blown out from the gap of the rotary blade portion 53 decreases, Mixing of fuel and air becomes insufficient, so that proper combustion cannot be performed, and the combustion width cannot be increased.

Another embodiment of the present invention will be described with reference to FIG. This embodiment is an example in which a damper 96 for autonomously adjusting the flow rate of air blown into the combustion cylinder 50 from the air supply hole 54 provided on the peripheral wall on the combustion cylinder 50 side is added. That is, a damper 96 which is moved by a spring 95 supported on the front plate 10b of the burner case 10 is provided between the burner case 10 and the combustion tube 50 on the tip side. As shown in FIG. 3A, when the combustion by the combustion device is at a high capacity operation such as at the time of maximum combustion or the like, the amount of air introduced into the burner case 10 from the fan 20 is large. And the damper 96 is retracted against the spring 95, so that the effective number of the air supply holes 54 of the combustion cylinder 50 is increased, and an excessive increase in the flow velocity of the air blown out from each air supply hole 54 is prevented. Further, as shown in FIGS. 3B and 3C, as the combustion by the combustion device decreases to the medium capacity operation and the small capacity operation, the damper 96 advances to the position of the spring 95 that balances the internal pressure of the burner case 10. Thus, the effective number of the air supply holes 54 is reduced. Therefore fan
Even when the air flow introduced from 20 into the burner case 10 is reduced, it is possible to suppress a decrease in the flow velocity of the air blown into the combustion cylinder 50 from each air supply hole 54, and to improve a good combustion state over a wide range. Capacity can be maintained over driving. When the damper 96 with the spring 95 is not provided, the amount of air supplied from the fan 20 decreases as the amount of combustion decreases, so that the flow velocity of air blown out from the air supply hole 54 of the combustion cylinder 50 decreases, and Insufficient mixing of air makes it impossible to perform proper combustion, and the combustion width cannot be increased.

[0014]

According to the present invention, the primary combustion air cylinder and the combustion air cylinder are previously mounted and fixed on the auxiliary air cylinder to form a unit. In addition, it is possible to prevent the occurrence of deviation of the center line between the primary air cylinder and the combustion cylinder, and it is also possible to prevent a gap from being generated at the joint surface between the edge of the opening end of the primary air cylinder and the edge of the spray fuel receiving port of the combustion cylinder. Can be prevented. In addition, simply aligning the center line between the spray nozzle and the primary air cylinder allows the center line between the combustion cylinder and the spray nozzle to be aligned at the same time, so that the spray nozzle faces the center of the spray fuel receiving port of the combustion cylinder accurately. be able to. Therefore, according to the petroleum combustion apparatus of the present invention, good combustion without combustion failure or the like can be stably performed. In addition, by providing an auxiliary air cylinder and providing an auxiliary air intake hole on the side peripheral surface, it is possible to freely adjust the flow rate of air supplied from the rotating blade portion into the combustion cylinder,
Combustion performance can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional configuration diagram of an oil-fired apparatus showing an embodiment of the present invention.

FIG. 2 is a front view and a side view of a combustion cylinder of an oil combustion device for explaining another embodiment of the present invention.

FIG. 3 is a cross-sectional view of a main part of an oil combustion apparatus for explaining still another embodiment of the present invention.

FIG. 4 is a sectional configuration diagram of a conventional oil combustion device.

[Explanation of symbols]

 10 Burner case 11a Back cover 11b Front plate 20 Fan 30 Spray nozzle 40 Primary air cylinder 42 Tip opening edge 43 Conical constriction 50 Combustion cylinder 51 Base end face 52 Spray fuel receiving port 53 Rotating blade section 60 Auxiliary air cylinder 61 Auxiliary Air intake

Claims (1)

(57) [Claims] A primary air cylinder which surrounds the spray nozzle concentrically in the burner case and takes a part of the air flow introduced into the burner case into the cylinder as primary air; A combustion cylinder in front of the spray nozzle and the primary air cylinder that receives and sprays the fuel sprayed from the spray nozzle, and the primary air cylinder is attached to a back cover of a burner case at a base end side, and the combustion is performed. The cylinder is attached to the front plate of the burner case at the distal end, and joins the cone-shaped distal opening edge of the primary air cylinder to the spray fuel receiving port edge provided on the base end surface of the combustion cylinder. An oil combustion apparatus as described above, wherein an auxiliary air cylinder is provided, and the primary air cylinder and the combustion cylinder are previously attached and fixed to the cylinder inner wall with respect to the auxiliary air cylinder, thereby opening the front end of the primary air cylinder. Edge and the combustion cylinder An integral unit in which the spray fuel receiving port edge of the base end surface is joined in advance is formed, and the unit is attached to the burner case at the base end side of the primary air cylinder and the tip end side of the combustion cylinder, respectively. At the same time as mounting, a part of the air flow introduced into the burner case is taken into the inside from an auxiliary air intake hole provided in the peripheral surface on the auxiliary combustion cylinder side, and around the spray fuel receiving port on the base end face of the combustion cylinder. An oil combustion device characterized in that it is configured to be introduced into a combustion cylinder from a provided rotating blade portion.