JPS6119289Y2 - - 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 such as 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 tube 7, which is made of a stainless steel pipe connected to the lower part by brazing. 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 rod shape. A cap 14 is screwed onto the lower part of the carburetor joint 8, and is sealed with an O-ring 15. 16
17 is a needle body having a cleaning needle (hereinafter simply referred to as needle) 5 for cleaning the nozzle 3, and 17 is a bimetallic needle that is sealed to the vaporizer body 1 via a bimetal seal 18 and stores a bimetal 19 therein. It is a case. 20 is an escape hole through which vaporized kerosene collects in the bimetal case 17 and returns to the vaporization cylinder 7 after being liquefied;
It passes through the carburetor main body 1. Reference numeral 21 denotes an E-ring formed by connecting the bimetal 19 to the end of the needle body 16. The needle guide portion 6 of the nozzle 3 is formed closer to the carburetor 1 than the orifice 4, and the inner wall surface is formed so that the diameter becomes gradually smaller toward the orifice 4. 22 is a vaporized gas passage for guiding vaporized gas to the nozzle port 3a of the nozzle 3.

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 tube 7 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 240 to 280°C), the energized closed pulp is energized and closed. Therefore, the 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, it gradually drops from the top of the oil level. It begins to vaporize. As the temperature of the vaporizer body 1 rises, the bimetal 19 inside the bimetal case 17 undergoes thermal deformation, causing the needle body 1 to undergo thermal deformation.
6 in the direction of arrow A to open the orifice 4 and blow out vaporized gas. The ejected vaporized gas is sucked into a mixing pipe (not shown) of a burner, and then ignited by a known ignition means in the burner (not shown) to become a combustion flame.

In the above-mentioned vaporizer, the needle 5 is operated by the bimetal 19 in order to prevent the nozzle port 3a of the nozzle 3 from clogging, but since the needle 5 is always located in the vaporized gas passage 22,
During long-term use, tar accumulates on the outer periphery of the needle 5, and in particular, if tar adheres to the tip of the needle 5, the nozzle port 3a may not be able to be cleaned due to the tar, or the tip of the needle 5 may become damaged. This has caused various malfunctions such as getting stuck in the nozzle opening 3a.

In order to prevent such malfunctions, the present invention surrounds the outer periphery of the needle with a needle guide to prevent vaporized gas from directly hitting the needle, thereby preventing tar from adhering to the needle.

FIG. 2 is a perspective view of the main parts of the vaporizer of the present invention,
The same parts as in FIG. 1 are denoted by the same reference numerals. In FIG. 2, reference numeral 23 indicates an insertion guide hole 2 for the needle 5 in the center.
It is a cylindrical needle guide with a diameter of 4 and is made of brass with good thermal conductivity. This needle guide 2
3 is formed into a square prism 25, 26 whose both ends are inscribed in the inner wall of the gas passage 22, and this square prism 2
It is fixed in the passage 22 with corners 5 and 26. In other words, before installing the nozzle 3,
By inserting the needle guide 23 from the opening of the passage 22 until it abuts the step a of the passage 22 and screwing the nozzle 3 on, the back and forth movement of the needle guide 23 is controlled by the step a and the needle guide part 6. It is fixed, and displacement in the circumferential direction is prevented by the inner wall of the passage. The above needle guide 23 has square pillars 2 at both ends.
Since a crescent-shaped passage 27 is formed between the outer peripheral surfaces of 5 and 26 and the inner wall of the passage 22, the vaporized gas is guided to the nozzle port 3a along this passage 27 and comes into direct contact with the needle 5. There aren't many things. According to the carburetor of the present invention having the above configuration, at least both ends of the needle guide that surrounds the needle up to the vicinity of the tip are formed in a polygonal shape during combustion, and the needle guide is Since the needle guide is inscribed in the inner wall of the cylindrical vaporized gas passage and the vaporized gas passage is formed between the inner wall of the vaporized gas passage and the outer peripheral surface of the needle guide, direct contact of the vaporized gas with the needle is reduced. , it is possible to prevent tar from adhering to the needle.

Conventionally, the needle was located in the center of the gas passage, so the needle temperature was lower than the temperature of the main body 1, and a lot of tar tended to be generated in this passage, but the needle guide was in contact with the inner wall of the vaporized gas passage. In addition, for example, if the needle guide is made of a material with good thermal conductivity, the temperature of the needle guide becomes high, the temperature of the vaporized gas in this part becomes high, and the generation of tar can be reduced. Also, in the past, tar tended to adhere to the needle side where the temperature was lower,
Although there was a large amount of tar attached to the needle,
This can be completely prevented by the needle guide.

The needle guide serves as a guide during needle displacement, so even if the needle moves rapidly, the tip enters the nozzle opening without shaking.
Cleaning can be done reliably.

Therefore, there is no adhesion of tar and operation is ensured.

This effect is achieved.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of the main parts showing an example of a vaporizer;
FIG. 2 is a perspective view of the main parts of a carburetor showing an embodiment of the present invention, in which 1...the carburetor body, 3...the nozzle,
3a...Nozzle opening, 5...Needle, 6...Needle guide section, 23...Needle guide.

Claims (1)

[Scope of Claim for Utility Model Registration] A vaporizer in which a needle for cleaning the nozzle opening is movably inserted back and forth into the vaporized gas passage communicating with the nozzle opening of the vaporized gas ejection nozzle, wherein the vaporized gas passage has a cylindrical shape. A needle guide is provided in this passageway for guiding the needle by surrounding it to the vicinity of the tip during retraction, and the needle guide has at least both ends formed into a polygonal shape, and has corners at both ends. What is claimed is: 1. A vaporizer characterized in that a vaporized gas passage is formed between the needle guide, the outer circumferential surface, and the inner wall of the vaporized gas passage;