JPH0220586Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an oil gasification burner, particularly one in which the combustion state is switched between high and low using a fluid element.

(Prior art and problems) Conventionally, this type of burner has been designed to use a fluid element to change the number of combustion sections that are actually used for combustion among the plurality of combustion sections or the amount of fuel in each combustion section. It has been proposed that the structure is structured as
136149 etc.). Conventionally, this fluid element includes, for example, as shown in FIG. 2, an inlet 11 into which a combustion air flow is blown, a branch flow guide part 12 which is continuous with the inlet 11 in a shape of expanding toward the end, and which is continuous with the branch flow guide part 12. and a control air passage 14 for ejecting a control air flow perpendicular to the combustion air flow at the connection between the inlet 11 and the branch flow guide section 12. However, since the diverting guide section 12 is formed in a shape that spreads uniformly toward the downstream, the combustion air flow adheres to the wall surface of the diverting guide section 12 when the flow rate is large, making it difficult to divide the air evenly. There is.

The present invention aims to eliminate such conventional drawbacks, and will be specifically explained below with reference to figures.

(Embodiment) Fig. 1 is a cross-sectional view of a fluid element used in an embodiment of the present invention, and in the figure, 1 is connected to a vaporizer (not shown) that mixes air with fuel made by vaporizing kerosene. , an inlet into which the combustion air flow in which fuel and air are mixed is blown; 2 is a branching guide section that extends outward from the inlet 1; 3 is each branch passage connected to the branching guide section 2; and the branch road 3 is
It communicates with the combustion section downstream from this. The combustion section may be of any known type, such as one in which the upper surface of the branch passage 3 is directly covered with a wire mesh to form a flame port, or one in which a passage is extended from the branch passage 3 and connected to a separate combustion pipe. Various methods can be applied. Reference numeral 4 denotes a control air passage that jets out a control air flow perpendicular to the combustion air flow at the connection point between the inlet 1 and the dividing guide section 2, and 5 is a splitter that divides the combustion air flow within the diverter guide section 2.

The branch flow guide section 2 includes a first guide wall 2a on the side of the inlet 1 and a second guide wall 2b connected to the downstream end of the first guide wall 2a in a stepped manner. The step a between the first guide wall 2a and the second guide wall 2b is set to be approximately twice the diameter d of the entrance 1, for example.

The combustion air flow adheres to the wall surfaces of the left and right branch guide portions 2 due to the viscosity between the walls, and flows while fluctuating unstably from side to side (flip-flop phenomenon). However, when the combustion air flow is small, the force that fluctuates in the left-right direction is weak, and by ejecting the control air flow from the control air passage 4, the combustion air flow is directed to one wall (here, the right wall). ), and combustion air can be stably supplied to only one branch path 3.

When the combustion air flow is large, in the conventional type, the branching guide section 12 is formed in a shape that spreads uniformly toward the downstream, so the length of the uniformly continuous wall surface is long, and the above-mentioned Flip-flop phenomenon is likely to occur. In contrast, in the present invention, the branching guide section 2 is divided into two stages, and the length of the uniformly continuous wall surface is short, so that the adhesion force of the combustion air to the wall surface is reduced. Therefore, fluctuations in the combustion air flow in the left and right directions are less likely to occur, and the combustion air flow is evenly divided left and right by the splitter 5. As a result, the combustion air can be evenly divided into each branch path 3, and even combustion can be performed in each combustion section (not shown) connected to each branch path 3, respectively.

(Effects of the invention) As described above, the present invention expands the wall surface of the flow dividing guide part of the fluid element into a step shape in the middle of the flow direction, so that the wall surface that the combustion air flow comes in contact with continues uniformly into a long length. Since the length is short and the adhesion force of the combustion air flow to the wall surface is small, it is difficult for the combustion air flow to fluctuate in the left and right direction, and the combustion air flow can be divided evenly. . As a result, it is possible to obtain effects such as being able to obtain an even combustion state in a plurality of combustion sections.

[Brief explanation of the drawing]

FIG. 1 is a plan sectional view of an embodiment of the present invention. FIG. 2 is a plan sectional view of a conventional example. 1... Inlet, 2... Diversion guide section, 3... Branch path, 4... Control air path.

Claims (1)

[Scope of utility model registration request] An inlet into which a combustion air flow containing a mixture of fuel and air is blown, a branch flow guide part that continues to the inlet in an expanding manner, and branch passages that are connected to the branch flow guide part and communicate with the downstream combustion part. , a fluid element equipped with a control air passage that jets out a controlled air flow perpendicular to the combustion air flow at the connection between the inlet and the dividing guide part, characterized in that the wall surface of the dividing guide part is widened into a step shape. Oil gasification burner.