JPS60165406A - Vaporizing burner - Google Patents

Abstract

PURPOSE:To flame up vaporizing combustion flame in a stable condition from the beginning of the combustion, by warming a blast shell and a combustion shell with a part of generated combustion heat. CONSTITUTION:The fuel fed to the surface of a fuel diffusion unit 23 is turned into vaporized gas rapidly while the fuel is spread in a thin film form along a vaporizing shell 11 inside, and simultaneously during the flowing, the fuel is mixed with air for combustion to be perfect vaporized gas to be pressed into a gas chamber 5. The pressed-in gas is jetted through a slot 4 for gas jet created on a combustion board 3 and is flamed by combustion flame, and whole vaporizing shell 11 is heated by flaming the vaporizing combustion flame. Therefore, after the vaporizing combustion flame is generated, vaporized gas is continuously generated as the vaporizing shell 11 is intensively heated, and the vaporizing combustion with blue flame can be continued for a long time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention automatically changes the fuel from the main combustion state to the vaporization combustion state.
, ), a part of the generated combustion heat heats both the feed cylinder and the combustion cylinder, and part of the mixed gas generated in the vaporization cylinder is heated up. To prevent liquefaction due to the cooling effect caused by contact with the blower cylinder and the #8 firing cylinder during the distribution process, and to stably form the vaporized combustion flame in a favorable preposition from the initial stage of fj% firing. Regarding vaporizing burners that can be used.

Conventionally, when fuel is automatically transferred from the main combustion state to the vaporization combustion state by a rotating vaporization cylinder, the generated mixed gas is blown into the gas chamber along the outer circumferential surface of the blast cylinder. The fuel is liquefied by the cooling action of the cylinder, becomes unvaporized fuel, and burns at the bottom of the gas chamber, causing red flame to be mixed into the vaporized combustion state, making it impossible to maintain good preheat vaporization combustion over a long period of time. In order to solve this problem, the above-mentioned blower tube was made into a double structure type with a hollow inside, or a heat generating ventilator with a heating resistor buried inside was used to prevent the mixture gas from liquefying. The vaporizing burner was disclosed in Japanese Utility Model Publication No. 56-35606 or Japanese Unexamined Patent Publication No. 57-18 before this application.
This was developed by the present applicant as described in Japanese Patent No. 8914.

By the way, the above-mentioned double structure type blower tube is somewhat effective as a measure to prevent cooling when the normal temperature of the circulating combustion air is relatively high, but - when the temperature of the combustion air is low In some cases, the cooling prevention effect is significantly reduced, and the mixed gas quickly liquefies and condenses inside the gas chamber. J
This results in the disadvantage that it burns as a red flame. In addition, although heat-generating ventilation tubes are highly effective, they consume a lot of electricity, and many disconnections occur during use, making it difficult to maintain stable vaporization combustion over a long period of time, which also increases costs. It has the disadvantage of being expensive and not suitable for general users.

In addition, when the combustion cylinder forming the gas chamber is at a low temperature, the mixed gas pressurized into the gas chamber can cause liquefaction and dew condensation inside the gas chamber due to the cooling effect caused by contact with the combustion cylinder wall surface. However, it is not possible to make the unvaporized fuel stay in the gas chamber and prevent red flame from getting into the pretreatment process for a considerable period of time from the start of vaporization combustion, and this causes the liquefaction dew phenomenon, which is caused by the vaporization burner. When used in cold regions, there is a tendency for the increase to increase, and this is something that has been strongly desired to be improved.

Therefore, in order to solve the above-mentioned drawbacks of the known vaporizing burner, the present invention effectively utilizes the heat transfer effect of the combustion heat generated by the start of combustion, and uses some kind of heating member for the blower tube and the combustion tube. Even if the combustion air and the wall of the combustion tube are in a low temperature state, it prevents the occurrence of liquefaction and condensation of the mixed gas, and creates a red flame from the early stage of combustion. The object of the present invention is to provide a vaporizing burner that can stably continue preheat vaporization combustion without contamination.

In view of the foregoing, in order to achieve the above object, the present invention has a structure in which the proximal end side of the blower tube, which has its distal end inserted into the vaporizing tube and is opened, is expanded and extended so as to wrap around the outer circumferential surface or inner circumferential surface of the combustion tube. The vaporizing burner is characterized in that the terminal end thereof is fixed to the tip opening of the combustion tube,
According to such a vaporizing burner, the base end side of the blower tube fixed to the tip opening of the combustion tube is intensely heated by a part of the combustion heat generated by the start of combustion, and the blower tube is heated by the direct heat transfer action. Not only the entire body but also the wall surface of the combustion tube heats up quickly, and the mixed gas generated in the vaporization tube is cooled by contact with the blower tube during the flow process to the gas chamber, or is forced into the gas chamber. This prevents the liquefaction and condensation phenomenon that occurs when the mixed gas comes into contact with the combustion cylinder wall surface and is cooled, and all of the generated mixed gas is constantly discharged from the gas chamber through the gas nozzle into the combustion cylinder. Perhaps it is possible to continue complete vaporization combustion in the foreground in a stable state from the initial stage of combustion by vigorously injecting the fume into the combustion chamber. This eliminates the use of temperature-raising components, making it cheaper than the cost of vaporizers, making it usable for general use, and increasing the temperature of the circulating combustion air to create a more complete mixture of gases. In addition to promoting the heating effect, since the proximal end surface of the blower tube and the wall surface of the combustion tube are doubled, the heating effect can be further promoted.

Embodiments of the vaporizing burner according to the present invention shown in the drawings will be described below.

The embodiment shown in FIGS. 1 and 2 is a vaporizer that can simultaneously burn the air-fuel mixture from the circumferential side and the bottom side of the combustion disk. The combustion tube is a bottomed cylindrical combustion tube with an open side, and the center portion of the bottom $2 side of the combustion tube 1 is slightly bulged outward.The inner peripheral surface side and the bottom surface side of the combustion tube 1 are There are many gas vents 4 in
Combustion disk 3 of approximately similar shape with .........
The tip side is attached to the tip opening 6 of the combustion tube 1 at a distance t between which the gas chamber 5 is formed between the combustion tube 1 and the combustion tube 1 . The combustion disk 3 has an opening at its center on the bottom side, and the opening peripheral wall 7 is formed in a tapered shape so as to face into the gas chamber 5. Reference numeral 8 denotes a ventilation chamber connected to the combustion tube 1 through an opening 9 opened at a central position on the bottom wall 2 side of the combustion tube 1, and a tip cap is provided at the center of the ventilation chamber 8 and the opening 9. A rotating shaft 10 facing into the combustion tube 1 is inserted, and a vaporizing tube 11 with one side open is directly connected to the tip side of the rotating shaft 10 and rotatably disposed therein. The mixed gas 12 flows into the fuel outflow gap 1 at the open side end.
3% - are integrally attached. Above mixed gas 1
With the 2Fi boundary wall 14 as a boundary, there is a fuel guide cylinder 15 whose distal end is expanded outward, and a hollow cylindrical cylinder 16 whose base end is the same diameter.
Moreover, the opening of the mixed gas 12 is located within the tapered opening periphery plI, and the opening is formed diagonally forward between the inner circumferential surface of the opening peripheral wall 7 and the outer circumferential surface of the mixed gas 12. A gas ejection gap 11 is formed. Note that the base end side of the gas ejection gap 17 is connected to the gas chamber 5, and at the same time, the gas chamber 5 is also communicated with the inside of the vaporization cylinder 11 via the mixed gas 12.

Reference numeral 18 denotes a hollow air tube for blowing the combustion air sent from the air chamber 8 through nine openings into the vaporization tube 11, and the tip opening 19 of the air tube 18 is connected to the vaporization tube 10.
The base end surface 20 side of the blower tube 18 is expanded and extended so as to wrap around the bottom wall 2 and the tube wall of the combustion tube 1 from the outside, and its terminal end 21 is fixed to the tip opening 6 of the combustion tube 1. has been done.

It should be noted that it is most effective to mold the blower tube 18 using a material with high conductivity, and at the same time, the expanded proximal end surface 2 of the blower tube 1B.
If the 0 side is fixed in close contact with the outer peripheral surface of the combustion tube 1, the temperature of not only the blower tube 18 but also the entire combustion tube 1 is quickly raised due to the heat transfer effect, and the entire combustion tube 1 is heated. be able to.

Reference numeral 22 denotes a fuel diffuser 2 attached to the inner surface of the tip side of the carburetor 11.
3 is an oil feed pipe with an open end facing the surface, and 24 is a spark plug.

In the second embodiment shown in FIG. 3, the proximal end surface 20 side of the blower tube 18 is expanded and extended in a close state so as to wrap around the inner circumferential surface of the combustion tube 1, and the terminal end 21 thereof is extended. This is a vaporizing burner that is clamped to the tip opening 6 of the combustion tube 1, and in the above embodiment, the base end surface 20 of the blast tube 18 is located on the inner circumferential surface of the combustion tube 1. Other than this, its construction is entirely the same as that of the vaporizing burner of the first embodiment shown in FIGS. 1 and 2.

The third embodiment shown in FIG. 4 includes a blower tube 18' having a base end surface 20', and a combustion plate 3 in which a large number of gas injection holes 4' are stretched inside the combustion tube 1'. This is a case where the gas chamber 5' is installed in a vaporizing burner that is provided with a hole only on the inner circumferential surface on the tip side of the gas chamber 5' so that the mixed gas pressurized into the gas chamber 5' is injected diagonally inward. In this example, the base end surface 20' side of the blower tube 18' is expanded and extended so as to wrap around the outer peripheral surface of the combustion tube 1', similar to the vaporizing burner of the first embodiment, and its terminal end side 21'
It is fixedly attached to the tip opening 6 of the combustion tube 1'. and,
In the third embodiment described above, the bottom wall 2' side of the combustion tube 1' is not bulged outward, and the mixed gas 12χ is not attached to the open end of the vaporization tube 11'. The opening peripheral wall 7', which is formed by simply unfolding and bending the - side open side end outwardly and opening at the center of the bottom side of the combustion disk 3', is opposite to that of the first embodiment, and the opening peripheral wall 7' is opposite to that of the first embodiment. The structure is the same as that of the first embodiment except that the open side end of the vaporizer m11' is bulged in the direction and a suitable fuel outflow gap 13'χ is formed between the open side end of the vaporizer m11' and the opening peripheral wall 1'. Same as example.

Also, in the vaporizing burner of the third embodiment, similarly to the second embodiment, the base end surface 20' side of the blast tube 18' is connected to the combustion tube 1'.
The terminal end 21 is extended so as to cover the inner peripheral surface of the
Of course, it may be fixed to the tip opening 6' of the combustion tube 1.

The fourth embodiment shown in FIG. 5 is installed in a vaporizing burner in which a gas chamber is formed only on the bottom wall 2' side of the combustion tube 1', which is on the 20° side of the base end face of the blast tube 18'. In the devaporizing burner, the cylindrical wall of the combustion tube 1' is made shorter than that of the vaporizing burner of the first embodiment, and the bottom wall 2' side thereof is provided with a large number of gas ejection holes 41 at intervals.・・・・・・・Punch the inside of the carburetor cylinder 11 at the center between the bottom wall 2″ of the combustion cylinder C and the combustion plate 3# by horizontally extending the combustion plate 3′. In addition, the central opening of the combustion disk 31 is provided with an opening peripheral wall r similar to that of the first embodiment, so that the mixed gas is blown upward. In the vaporizing burner having such a configuration, the base end surface 20 of the blow tube 1C
The first, second, and third embodiments can be achieved by expanding and extending the end portion 21' to the tip opening 6' of the combustion tube 1# by expanding and extending the outer circumferential surface of the combustion tube 1#. Similarly, it is possible to prevent the occurrence of liquefaction and dew condensation of the air-fuel mixture, and to achieve pre-combustion without red flames being mixed in more stably than at the time of startup.

Also, in the vaporizing burner of the fourth embodiment, the proximal end surface 20'' side of the blast tube 18' is expanded and extended so that the inner circumferential surface of the combustion tube 1# is wrapped, and the terminal end 21' is connected to the combustion tube 1'. Tip opening 6'
Similar effects can be achieved by having a structure fixed to the.

Next, its effect will be explained.

In FIGS. 1 and 2, combustion air is injected from the blow chamber 8 through the opening 9 and the blow tube 18, and the vaporizing tube 11 is rotated by the rotating shaft 10.

After that, the combustion air is introduced into the gas chamber 5 through the cylinder body 16 between and inside the vaporizer cylinder 11 and the blower cylinder 18, and then is introduced into the gas chamber 5 through the numerous gas injection holes 4... ...and gas gushing interval 1! They are ejected into the combustion cylinder 1 from A17.

Therefore, the fuel diffuser 23 rotates the fuel from the oil feed pipe 22.
If the fuel is sent to the inner circumferential surface of the vaporizer cylinder 11 through the
11 is gradually moved to the open side, it becomes a thin film due to the rotational centrifugal force and the injection action of combustion air, and exits from the fuel outflow gap 13 to the surface of the fuel guide tube 15, and finally, the periphery thereof. It becomes fine particles from the end and is sprayed onto the inner circumferential surface of the combustion plate 3, and is ignited by the spark plug 24 and combusted. When the main combustion occurs in this manner, the entire vaporization tube 11 is rapidly heated by the combustion flame, and the temperature inside the vaporization tube 11 is rapidly raised to the atmospheric temperature at which vaporization occurs.

Therefore, from then on, from the oil pipe 22 to the fuel diffuser 23
The fuel delivered to the surface is quickly evaporated and vaporized while being diffused and transferred in a thin film along the inner surface of the vaporization cylinder 11, becoming vaporized gas. At the same time, the generated vaporized gas is mixed with combustion air during its circulation. They are mixed to form a complete mixture of gases, which is then pressurized into the gas chamber 5.

The injected air-fuel mixture is then vigorously ejected through the gas injection holes 4, which are perforated on the inner circumferential surface and bottom side of the combustion plate 3, and is ignited by the flame of the sagi, resulting in vaporization and combustion. The entire vaporizing cylinder 11 is heated by using the flame as field soil.

Therefore, since the vaporization tube 11 is intensely heated after the vaporization combustion flame is generated, vaporized gas is continuously generated, and the vaporization combustion in the foreground can be continued for a long period of time.

By the way, at the time of starting vaporization combustion as described above, combustion air is forcibly injected from the blower chamber 8 through the blower tube 18 into the vaporizer tube 11 and the gas chamber 5, so the blower tube is 18 and the combustion tube 1 are cooled by the circulating firing air, so in the process in which the super-oxidized mixed gas in the vaporization tube 11 is introduced into the gas chamber 5 along the outer circumferential surface of the blast tube 18. It is cooled by contact with J1'-1i1 of the blast tube 18 and the wall surface of the combustion tube 1, causing a liquefaction dew phenomenon.
The unvaporized fuel flows down into the gas chamber 5 and accumulates therein. As a result, this accumulated unvaporized fuel flows out from the combustion plate 3 and is burned, so that the red flame of the unvaporized fuel is mixed into the vaporized combustion flame in the flame state, and a complete RF flame state is created. Unable to continue stably.

However, in the present invention, the proximal end surface 20 side of the air blower 1VilB, which has an opening 19 inserted into the vaporizing tube 11 on its distal end side, is opened and extended so as to wrap around the outer circumferential surface or the inner circumferential surface of the combustion tube 1,
Burn the terminal end 21 fl! Since it is fixed to the tip opening 6 of the pipe, both the fixed part 6 and the end part 21 are intensely heated by the raw combustion flame generated at the start of combustion, and the entire blast tube 18 is heated by the heat transfer action. Of course, combustion tube 1
Both walls are heated externally to a heated state. Therefore, combustion is automatically transferred from the main combustion state to the vaporization combustion state,
When the time comes for mixed gas to be generated, both the blower tube 18 and the combustion tube 1 reach a considerable temperature, and the generated hot gas is transferred to the blower tube 1.
(Even if the mixed gas flows while being in contact with the cylinder 18 and the combustion cylinder 1, the mixed gas can be vigorously combusted through the gas chamber 5 and the gas ejection holes 4 without causing any liquefaction dew phenomenon due to cooling. As a result, even when there is a large circulation area for combustion air, or when combustion is carried out in a cold region, vaporization combustion continues stably from the time it starts without any red flames being used. can be done.

[Brief explanation of the drawing]

The drawings show various embodiments of the vaporizing burner according to the present invention, and FIG. 1 is a partially cutaway longitudinal sectional front view of the vaporizing burner according to the first embodiment, and FIG. 2 is a side view thereof. 3 is a partially cutaway vertical sectional front view of the vaporizing burner according to the second embodiment, FIG. 4 is a partially cutaway vertical sectional front view of the vaporizing burner according to the third embodiment, and FIG. FIG. 7 is a cutaway longitudinal sectional front view of the fourth embodiment. 1... e: Melt tube, 3... Combustion plate, 4... Gas outlet, 5... Gas chamber, 6... Opening at the end of the combustion tube, 1
DESCRIPTION OF SYMBOLS 1... Vaporization tube, 18... Heat transfer strut, 19... Blower tube, 20... Between the tips of the blower tube (] part, 21... Its expanded proximal end surface, 22... Blower tube Terminal side of the expanded proximal surface of the patent applicant Co., Ltd. Dowa Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] Combustion disks with a large number of gas ejection holes are placed at intervals in a combustion tube in which a vaporization tube with one side open is rotatably arranged, and the inside of the vaporization tube is connected between the combustion tube and the combustion disk. In a device in which a communicating gas chamber is provided, the proximal end surface of the blower tube whose distal end is inserted into the vaporization tube and opened is expanded and extended so that the outer circumferential surface of the combustion tube is wrapped around the inner circumferential surface, and the terminal end thereof is extended. A vaporizing burner characterized in that a part is fixed to an opening at the tip of a combustion tube.