JPS6026259Y2 - vaporizer - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a vaporizer for vaporizing oil in a gasification oil combustor or the like.

A conventional vaporizer of a gasified oil combustor has a configuration as shown in FIG.

In the figure, reference numeral 1 denotes a brass carburetor main body, which has a nozzle 3 screwed onto it, which has an orifice 4 in the center, and a vaporizer cylinder 7 connected to the lower part by a stainless steel pipe connected by brazing. It is provided.

8 is a carburetor joint that is brazed to the lower part of the carburetor tube 7, and on one side is an oil feed pipe 9 that supplies kerosene from the fuel tank by an electromagnetic pump (not shown). 10, and a drain pipe 11 for returning to the fuel tank side is connected to the other side by a fukuro nut 12.

Reference numeral 13 denotes a vaporization stabilizing material inserted into the vaporization cylinder 7, which is made of foamed metal, sintered metal, or the like and molded into a round bar shape.

A cap 14 is screwed onto the lower part of the carburetor joint 8, and is sealed by an O-ring 15.

16 is a cleaning needle (hereinafter referred to as
(simply referred to as a needle) 5;
Reference numeral 17 denotes a bimetal case which is sealed to the carburetor body 1 via a bimetal seal 18 and houses a bimetal 19 therein.

Reference numeral 20 denotes an escape hole through which vaporized kerosene collects in the bimetal case 17 and returns to the vaporizer tube 7 after being liquefied, and penetrates through the vaporizer tube main body 1.

21 is the bimetal 1 attached to the end of the needle body 16.
9 is connected to form an E-ring.

The needle guide portion 6 of the nozzle 3 is formed closer to the vaporizer 1 than the orifice 4, and the inner wall surface is formed so that the diameter gradually decreases toward the orifice 4.

Next, the operation of the vaporizer having the above configuration will be briefly explained.

First, when the operation switch (not shown) is turned on, the preheating heater (not shown) attached to the carburetor body 1 is energized, and the electromagnetic pump (not shown) starts operating to supply oil. The oil is fed into the vaporizer cylinder 7 via the pipe 9.

Until the temperature of the carburetor main body 1 rises to a predetermined level, the kerosene in the carburetor cylinder 4 returns to the fuel tank through the drain pipe 11 by opening a valve (not shown) that closes when energized. , when the vaporizer main body 1 reaches a predetermined temperature (approximately 2
40 to 280° C.), the energized-closed valve is energized and closed.

Therefore, kerosene does not flow back into the fuel tank from the drain pipe 11, and begins to accumulate in the vaporizer tube 7, and when the oil level in the vaporizer tube 7 reaches a certain value, the kerosene gradually flows from the top of the oil level. begins to change.

As the temperature of the vaporizer body 1 rises, the bimetal 19 in the bimetal case 17 undergoes thermal deformation, and the needle body 15 is pulled in the direction of arrow A, causing the orifice 4 to open and eject the vaporized gas.

This ejected vaporized gas is transferred to the burner mixing pipe (not shown).
After being sucked into the flame, it is ignited by a well-known ignition means in a burner (not shown) to become a combustion flame.

In the above-mentioned vaporizer, the vaporization stabilizer 13 receives heat from the vaporizer main body 1 to promote the vaporization of kerosene, and also removes heavy components (components that are difficult to vaporize) in the vaporized gas by its filtering action. It serves to prevent the nozzle portion 3 from clogging.

Therefore, during long-term use, the communication holes of the vaporization stabilizing material 13 become clogged with the gas, making it impossible for vaporized oil and gas to pass through.

Therefore, in order to maintain the performance of the vaporizer, it is sufficient to replace the clogging stabilizer 13, but the clogging stabilizer 13 is caused by the tar accumulated between its outer periphery and the inner wall of the vaporizer 7. Since the stabilizer 13 was fixed to the vaporizer tube 7 by the stabilizer 13, the stabilizer 13 could not be removed from the vaporizer main body 1, and the entire vaporizer had to be replaced.

In addition, in order to make it easier to remove the vaporization stabilizer 13 from the main body 1, a clearance (gap) is provided between the outer periphery of the stabilizer 13 and the vaporization cylinder 7, which will have a filter effect and remove the stabilizer 1 from the main body 1.
The heat conduction to the nozzle portion 3 becomes poor, which has an adverse effect on the promotion of vaporization, and also causes clogging of the nozzle portion 3 due to tar.

The present invention was developed to eliminate the above-mentioned drawbacks.
The following description will be made with reference to an embodiment shown in FIG.

Note that the same parts as in FIG. 1 are denoted by the same reference numerals. 1a is a brass carburetor body, which differs from the carburetor body 1 in FIG. 1 in that portions corresponding to the carburetor tube 7 and carburetor joint 8 in FIG. 1 are integrally formed.

Reference numeral 22 denotes a vaporization chamber with a circular cross section formed in the carburetor main body 1a, and its lower end opening 23 is connected to a cap nut 14 and an O-ring 15.
is sealed by.

Reference numeral 24 denotes an annular collar formed on the upper inner peripheral surface of the vaporization chamber 22.

Reference numeral 25 denotes a cylindrical brass vaporization aid inserted into the vaporization chamber 22 from the lower end opening 23, which is cut out from the upper cylindrical part 25a and the lower cylindrical part 25b, and has its upper end abutting the collar 24 and its lower end. protrudes slightly from the lower end opening 23 and serves as a clue when taking out the vaporization aid 25.

26 is the lower end of the cylindrical portion 25a (i.e., the lower cylindrical portion 25b
The cylindrical part 25 has a plurality of holes drilled near the connecting part).
Connects the inside and outside of a.

The outer diameter of the lower part of the auxiliary tool 25 corresponding to the hole 26 is formed to be slightly smaller than the outer diameter of the upper part, and the distance between it and the inner peripheral surface of the vaporizing chamber 22 is 0.5 rIr! A cylindrical communication path 27 of about n is formed.

The hole 26 is located above the oil circulation passage 28, and communicates with the circulation passage 28 through the communication passage 27.

Reference numeral 29 denotes a vaporization promoting material press-fitted into the upper cylindrical portion 25a, which is formed into a round rod shape of wire mesh, foamed metal, sintered metal, or the like.

Therefore, this promoting material 29 has a large number of small-diameter communicating holes, and the oil rises while being vaporized in these holes and escapes to the nozzle 3 side.

Note that the lower end of this promoting material 29 is located above the hole 26, and a space 30 is created between it and the upper surface of the lower cylindrical portion 25b.
is formed.

Reference numeral 31 denotes a groove formed in the lower cylindrical portion 25b, and is located between the circulation passage 28 and the hole 26.

Reference numeral 32 denotes a leaf spring provided on the lower surface of the lower cylindrical portion 25b, which serves to press the vaporization aid 25 upward and bring the upper end of the waist upper cylindrical portion 25a into close contact with the lower surface of the annular collar 24 when the cap nut 14 is screwed on. Intimidate.

Next, the operation of the vaporizer of the present invention will be explained.

When the vaporizer main body 1a reaches a predetermined temperature, kerosene begins to accumulate in the vaporization chamber 22 as described above, rises in the communication passage 27, and flows through the hole 26 into the lower space 30 in the upper cylindrical portion 25a.

Then, the cylindrical portion 25a1 is vaporized by the heat of the vaporization promoting material 29, the tar is removed on the upper side of the vaporizing promoting material 29, and the tar is moved to the nozzle 3 side.

In this case, the outer periphery of the upper cylindrical part 25a of the vaporization aid 25 is almost in close contact with the inner periphery of the vaporization chamber 22, and the cylindrical part 25a
Since the upper end is crimped to the annular collar 24, the vaporized gas does not flow between the inner periphery of the vaporization chamber 22 and the outer periphery of the cylindrical portion 25a, and tar does not accumulate therein.

Therefore, even if the vaporization accelerator 29 becomes clogged with tar due to long-term use, the vaporization aid 25 will not be stuck to the periphery of the vaporization chamber due to tar, and the cap nut 14 can be removed and the vaporization By pulling the lower end of the auxiliary tool 25, the auxiliary tool 25 can be easily attached to the vaporizer main body 1a.
It can be taken outside.

Therefore, the vaporization aid 25 can be used without replacing the entire vaporizer.
The vaporization performance can be regenerated by replacing the vaporization promoting material 29 with a new one, or by replacing only the vaporization promoting material 29 with a new one.

In addition, since the cylindrical portion 25a of the vaporization aid 25 is in contact with the inner surface of the vaporization chamber 22 of the vaporizer main body 1a over the entire circumference, heat conduction from the vaporizer main body 1 is good, and the vaporization promoting material 29 is Since it is crimped onto the inner surface of the cylindrical portion 25a, heat conduction from the cylindrical portion 25a to the promoting material 29 is improved, and vaporization can be performed efficiently.

In the case of the conventional vaporization stabilizer 13, since it is made of foam metal or the like, it can be slidably inserted into the vaporization tube 7 and
It cannot be machined so that it comes into close contact with the inner surface, and a slight gap inevitably exists between it and the inner surface of the vaporizing cylinder 7.

On the other hand, in the case of the present invention, since both the cylindrical part 25a and the inner wall of the vaporization chamber are made of metal, they are brought into close contact with each other by cutting, and a vaporization promoting material is applied to the cylindrical part 25a. 29 is press-fitted, the cylindrical part 2 is removed from the carburetor main body 1a.
5a, the heat conduction to the promoting material 29 is higher than in the conventional case.

Furthermore, in the vaporizer of the present invention, before the vaporizer main body 1a reaches a predetermined temperature, oil flows through the circulation passage 2 as in the conventional case.
8 is recirculated, but the oil level at that time is approximately at the position of the dotted line A-A.

Therefore, without the groove 31, the communication path 27 with a width of 0.5 mm
The kerosene rises and flows into the lower space 30 of the cylindrical portion 25a even though it is not at the predetermined temperature.

Since this cylindrical portion 25a is at a fairly high temperature even in the preheating stage, a phenomenon occurs in which the inflowing kerosene turns into oil smoke and gradually spews out from the nozzle 3.

However, if the groove portion 31 is provided, the communication path 27 is widened in this portion, so that the oil level will not rise abnormally, and the above-mentioned inconvenience will be eliminated.

The reason why the lower space 30 and the circulation passage 28 are communicated with each other through the communication passage 27 with a small gap is to allow the oil to reach the space 30 in a short time when the carburetor main body 1a reaches a predetermined temperature. be.

This means that the igniter, for example, is activated at the same time as the predetermined temperature is reached, so if the oil does not reach the space 30 within a short period of time, not only will the igniter operate longer, but the time until ignition will be delayed. This is because it becomes longer.

As mentioned above, the present invention has the advantage that when the vaporization performance of the vaporizer deteriorates due to tar clogging due to long-term use, the vaporization performance can be restored simply by replacing the vaporization aid.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of the main parts of a conventional carburetor, and FIG. 2 is a cross-sectional view of a carburetor according to an embodiment of the present invention, in which 1a is the carburetor body, 3 is the nozzle, and 4 is the orifice. , 5 is a needle, 6 is a needle guide, 25 is a vaporization aid, 2
5a is an upper cylindrical part, 25b is a lower cylindrical part, and 29 is a vaporization promoting material.

Claims (1)

[Scope of Claim for Utility Model Registration] A vaporizer equipped with a vaporization aid that promotes the vaporization of oil in the vaporization chamber of the vaporizer main body, wherein the vaporization aid is a metal cylindrical part installed in the peripheral wall of the vaporization chamber. , a vaporization accelerator having a large number of communication holes press-fitted into the cylindrical part, and a guide that forms a communication path for oil to the vaporization accelerator and serves as a clue for taking the cylindrical part out of the vaporization chamber. A vaporizer characterized by the following: