JPH0129366Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is a double-tube type combustion cylinder equipped with an inner cylinder 1, a middle cylinder 2, an outer cylinder 3, etc., and a combustion cylinder that supplies secondary air to the upper part and performs white flame combustion. In this type of white flame combustion system, it is most ideal for the tip of the white flame to spread out in a circle around the entire circumference, but as shown in Figure 2, when the flame is viewed from above, There are some irregularities, such as the flame splitting into four just above the cross pin 7, and one end of the flame being short and the other end being long. The reason for this is that the cross pin 7 is used to integrate the combustion cylinders, and the cross pin transmission holes 1', 2', 3' are drilled in the inner cylinder 1, middle cylinder 2, and outer cylinder 3 from the outer diameter of the cross pin 7. Since the diameter of the holes is slightly large, the holes 1', 2', and 3' are formed as shown by the arrows in Fig.
This is because extra air enters the combustion chamber, causing combustion to complete faster and causing unbalanced combustion. In order to adjust this balance, various types of air flow control plates and control plates are included, but no fundamental solution has been reached. In this case, the gap a between the outer edge of the control plate 5 provided in the gap between the middle cylinder 2 and the outer cylinder 3 and the middle cylinder 2 is varied, that is, the gap a above the cross pin 7 is changed.
By narrowing the gap a at the top of the cross pin 7 to adjust the flow of air entering from the outside of the middle cylinder 2, the gap a is - The amount of air entering the gap (flame path) between the inner cylinders 1 and 2 is balanced, and the secondary combustion part (white flame at the top) becomes approximately circular in shape. Even with double-tube combustion tubes that do not exhibit a white flame due to secondary combustion, it is difficult to understand the effect even if there is a slight imbalance in the amount of air. Since it has a large effect on the quantity and does not look good, we have worked hard to improve it, but as in this invention, the outer edge of the control plate 5 is not just circular, but has a third shape.
As shown in the figure, the problem was solved by protruding the upper part of the cross pin 7 inward to narrow the gap a. There is also a method shown in FIG. 4 for controlling the amount of air entering the upper part of the cross pin 7.
That is, it is also conceivable to provide through holes 6 all around the outer edge and skip one or two of these through holes 6 just above the cross pins 7, or to make them small to control the amount of air. In short, it is an essential requirement for this type of secondary combustion (white flame) combustion cylinder to balance the amount of air entering the gap between the middle and inner cylinders 1 and 2 at the top of the cross pin 7 as much as possible over the entire circumference. The present invention satisfies this requirement with a simple structure and at low cost.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of this device, Fig. 2 is a top view showing the state of the flame, Fig. 3 is a bottom view showing one embodiment of the main part, and Fig. 4 is another embodiment of the same main part. FIG. 1... Inner cylinder, 2... Middle cylinder, 3... Outer cylinder, 4...
Upper part of combustion tube, 5... control board, 7... cross pin,
a...Gap between the inner cylinder 2 and the outer edge of the control plate 5 provided on the outer cylinder 3.

Claims (1)

[Scope of utility model registration request] Combustion cylinder A is a double cylinder type combustion cylinder comprising an inner cylinder 1, a middle cylinder 2, and an outer cylinder 3. Secondary air is supplied to the upper part 4 of the combustion cylinder to perform white flame combustion.In the combustion cylinder A, the middle cylinder 2 and the outer cylinder A control plate 5 for controlling inflow air is provided in the gap between the
The gap a between the outer edge of the control plate 5 and the middle cylinder 2 is defined as the combustion cylinder A.
The combustion tube of an oil combustor is narrowed at the top of the cross pin 7 that integrates the two.