JPS6039606Y2 - Burner device for liquid fuel - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improved structure of a burner device that vaporizes liquid fuel such as kerosene and performs gasification and blue flame combustion.

In a burner device that performs gasification and cyanization combustion, a tip member is attached to a burner body that forms a vaporization chamber, and is equipped with a burner head that has a vent hole on the bottom wall and a flame port on the other end. Japanese Patent Application No. 53-63059 discloses a device which is divided into parts and whose tip member is detachably attached to the burner body so that assembly can be easily performed.

7) In this conventional burner device, the burner head is locked inside the stepped portion of the case, and a gasket is interposed between the circumferential side of the burner head and the inner circumferential surface of the tip member. Furthermore, a ring-shaped pressing member is attached to the outer surface of the burner head, and a plurality of claws provided on the tip member are bent inward to press the pressing member against the burner head, thereby pressing the burner head at the tip. Since it is attached to a member, the burner head attachment structure is complicated.

Also, since the tip member is attached to the burner body using screws, remove the tip member from the burner body 1.
If the screw is lost in such a case, there is a problem in that the tip member cannot be reassembled to the burner body.

The present invention aims to solve the above-mentioned problems of the prior art and to provide a burner device that can perform better vaporization combustion.

To explain the figures below, 1 is a burner motor installed in a motor case 3 having an intake cylinder 2, and its rotating shaft 4
An intake fan 6 located within the fan case 5 is attached to the motor case 3 and protrudes upward from a lower portion between the upper surfaces of the motor case 3.

The motor case 3 has small, medium, and large cylinders 3a, 3b, 3
c and two stepped portions 3d and 3e are formed into a bowl shape by drawing, and a rubber cap 40 is attached to the lower surface of the lower body 3'; and an inverted bowl-shaped upper body 3'' that closes the upper end opening of the lower body 3'. The fan case 5 consists of a pair of upper and lower bodies 5a and 5b placed on the second step 3e and housed in the large cylinder 3c.The upper body 3'' of the motor case 3 is connected to the lower body 3' by screws 8a. It is clamped and fixed by tightening with the nut 8b.

Also, the burner motor 1 housed in the middle cylinder 3b of the motor case 3 has its lower part located in the small cylinder 3a, and its mounting ears 1' are placed on the first step part 3d, and the nut 10 is attached via the rubber backing 9.
It can be installed by screwing it onto the screw 11 of the mounting ear 1'.

Furthermore, the motor case 3 inserts its small cylinder 3a into the mounting opening of the support stand 12, places the first step part 3d on the support stand, and fixes it by welding or the like, and then uses this support stand 12 to smoke the motor case. It is installed inside the combustion engine.

Reference numeral 13 denotes a heat shield plate attached to the upper surface of the motor case 3 via a heat insulating plate 14, and a combustion cylinder 15 is attached to the heat shield plate 13.

Reference numeral 16 denotes a burner section located within the combustion tube 15. In the following description, reference numeral 17 indicates a bowl-shaped and cylindrical burner section constituting one side of a burner body 19 which is fixed to the upper surface of the motor case 3 with a screw 18 via a heat insulating plate 14. The base member forms an internal space as a vaporization chamber 20, and an air port 21 that matches the open lower part of the motor case 3 is formed on the bottom surface, and a threaded portion 22 is formed by making the inner periphery of the upper end large in diameter. Furthermore, an annular groove 23 that is open upward is formed on the outside of the threaded portion 22.

24 is a sheathed heater for vaporization housed in the annular groove 23 and welded; 25 is a rotary atomizer located in the vaporization chamber 20 in the base member 17 and attached to the rotating shaft 4 of the burner motor 1; It is constructed by attaching a cone-shaped rotating body 25a, a scattering plate 25b, and a stirring blade 25c to the rotating shaft 4 inserted through the air port 21 in this order.

A fuel supply pipe 26 has one end opposed to the rotating body 25a with a small gap, and the other end connected to a liquid fuel tank via a solenoid valve, a pump, etc.

This supply pipe 26 is inserted from the side of the upper body 3'' of the motor case 3, and is inserted through an L-shaped fitting 27 that is spot-welded and attached to the inner surface of the upper body 3'', and the protruding portion and the insertion portion are brazed. I support this with two points.

This is because the gap between the tip of the supply pipe 26 and the surface of the rotating body 25a needs to be accurately determined, so that L is set near the tip of the supply pipe 26.
It is supported by a letter-shaped metal fitting 27.

In addition, when adjusting the gap, the tip of the supply pipe 26 is bent using a jig, but the support point is the motor case 3.
This is because if only a portion is bent at a long distance from the tip, the bending point will not be determined and adjustment will be difficult.

Reference numeral 28 denotes a bottomed cylindrical tip member constituting the other side of the burner body 19, which is provided with a threaded portion 29 on the outer periphery of the lower end to be threaded into the threaded portion 22 of the base member 17, and is expanded outward at the upper end. A central vent 31 is formed in the bottom wall 32 of the tip member 28 and is narrowed to a diameter smaller than the inner diameter of the vaporization chamber 20.

33 is a wire mesh plate 33a with a fine mesh on the inside.

A flange piece 33' is bent on the outer periphery of the patching plate 33b using a heat equalizing member formed by superimposing a punching plate 33b on the outside, and the flange piece 33' is placed on the bottom wall 32 and an appropriate number of screws are inserted. 34
It is attached to the bottom wall part 32 by.

Therefore, a flow path for the air-fuel mixture is formed in the gap between the heat equalizing member 33 and the bottom wall portion 32.

35a and 35b are inserted into the mounting rod 36 which is attached to the center of the heat equalizing member 33 and stands upright, and the nuts 37 are inserted into the mounting rod 3.
A pair of upper and lower burner heads are attached to the base of the inclined collar 30 by screwing into the slits 38a, 38a...
8b, 38b, . . . are provided, and a communication hole 39 is provided in the center of the lower head 35a.

The pair of upper and lower burner heads 35 a? The pitch of the slits 38a, 38a, which serve as the flame openings of 35b, are set to be approximately the same, and the depth of the slits is made smaller in the lower head 35a than in the upper head 35b, so that the area of the flame opening is small.

Both the base member 17 and the tip member 28 constituting the burner body 19 are made of a heat-resistant alloy and are molded by gui-casting.

The present invention has the above configuration, and its operation will be explained next.

When the burner body 19 is heated by the vaporization heater 24 and reaches a temperature that allows vaporization, the burner motor 1 is rotated and liquid fuel is supplied onto the rotating body 25a from the supply pipe 26. The liquid fuel is guided by the rotating body and passes through the scattering plate. 25b toward the inner surface of the base member 17 of the burner body 19.

Since the base member 17 is heated by the vaporization heater 24, the scattered liquid fuel is instantly vaporized.

On the other hand, air sucked from the intake cylinder 2 by the intake fan 6 is introduced into the vaporization chamber 20 through the open lower part of the motor case 3 and the air port 21 of the base member 17, and is mixed with vaporized gas by the action of the stirring blade 25c to form an air-fuel mixture. becomes.

This mixture is introduced into the gap between the heat equalizing member 33 and the bottom wall 32 through the vent 31 of the bottom wall 32 of the tip member 28,
Since these members are heated when passing through the wire mesh 33a and punching plate 33b that constitute the heat equalizing member 33, the air-fuel mixture is heated again, and large particles that have not been sufficiently atomized are atomized. This improves the vaporization state, equalizes the pressure of the air-fuel mixture, and further promotes mixing of the vaporized gas and air.

In short, the air-fuel mixture that has passed through the heat-uniforming member 33 is a very finely atomized air-fuel mixture under uniform pressure.

Therefore, uniform gas is injected from slits 38a and 38b, which serve as flame ports, provided on the outer periphery of the pair of upper and lower burner heads 35a and 35b, and when this is ignited by a spark plug (not shown), green flame combustion is performed. .

When combustion starts, the flame from the slit 38a of the lower head 35a heats the inclined flange 30 of the tip member 28. During normal combustion, this combustion flame heats the burner body 19 to a temperature higher than the vaporization temperature, and the vaporization heater 24 is not energized. No longer needed.

Since the area of the upper and lower flame openings is smaller at the bottom than at the top, the combustion flame is also smaller.

This is made small because it only needs to be able to heat the inclined collar 30, and if the amount of fuel is varied to cause a stronger or weaker combustion, the combustion flame will also vary accordingly, but the smaller the flame opening, the smaller the difference in the length of the flame. Therefore, the amount of heat used to heat the inclined flange 30 does not change much, and the temperature of the burner body 19 is kept approximately constant regardless of strong or weak combustion, thereby maintaining a good condition of the air-fuel mixture.

Since the burner device of the present invention is constructed as described above, it exhibits the following effects.

■ The burner body is divided into a base member and a tip member that can be attached and detached, and the base member is equipped with a vaporization chamber heated by a vaporization heater and a rotating atomizer, while the tip member is attached to its bottom wall. It is equipped with a burner head that forms a central vent and has a flame port at the top, and a heat equalizing member is installed inside the tip member, so simply removing the tip member from the base member will stop the rotation inside the vaporization chamber. The atomizer can be exposed to the outside, making maintenance and inspection inside the vaporization chamber easy.

■ The tip member is removably screwed into the threaded part formed on the inner circumferential surface of the base member to connect the two members, so the screws that connect the two members as in the past are lost and the two members are damaged. It is possible to prevent the inconvenience that it becomes impossible to combine the two.

■ A central ventilation hole is formed in the bottom wall of the tip member, and a heat equalizing plate made of a wire mesh plate, a punching plate, etc. is installed within the tip member with a gap between it and the top surface of the bottom wall. Therefore, the large fuel particles that were not vaporized in the vaporization chamber come into contact with the heat equalizing member and are vaporized, and the air-fuel mixture passes through the heat equalizing member to equalize the pressure and is evenly jetted from the flame port. Stable and good vaporization combustion can be performed.

■ The burner head installed on the top of the tip member is supported by the heat equalizing member via the mounting rod, so the heat equalizing member also serves as the support part for the burner head, simplifying the burner head mounting structure. At the same time, it is possible to improve the assembly workability.

[Brief explanation of drawings]

The figures are all of the present invention; Fig. 1 is a sectional view, Fig. 2 is an exploded sectional view of the burner body, Fig. 3 is an exploded sectional view of the motor case, and Fig. 4 is a perspective view of the burner head. ,
FIG. 5 is a perspective view of the upper body portion of the motor case. 19... Burner body, 17... Base member, 28... Tip member, 25... Atomizer, 33... Soaking Members, 24... Vaporization heater, 35at 35b... Burner head.

Claims (1)

[Scope of utility model registration request] The burner body 19 is divided into a base member 17 and a tip member 28, and the tip member 28 is removably screwed onto a threaded portion 22 formed on the inner peripheral surface of the base member 17. A vaporization chamber 20 heated by a heater 24 and a rotary atomizer 25 are provided, and the tip member 28 is provided with a bottom wall portion 32 thereof.
A center vent 31 is formed in the bottom, and burner heads 35a and 35b having flame ports are provided at the top, and a heat equalizing member 33 composed of a wire mesh plate 33a, a punching plate 33b, etc. is installed in the tip member 28. The burner heads 35a, 35 are mounted with a space between them and the upper surface of the wall portion 32, and the burner heads 35a, 35
A liquid fuel burner device characterized in that b is supported by the heat equalizing member 33 via a mounting rod 36.