JPH0624663Y2 - Oil combustor fuel supply system - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to improvement of a fuel supply path to a burner of an oil combustor.

[Conventional technology]

In the case where the fuel pumped by the fuel pump is used for combustion, the fuel remains in the fuel supply pipe even if the fuel pump is stopped by the fire extinguishing operation, and this fuel gradually flows to the burner or the fuel supply pipe The residual heat may cause a high temperature to vaporize the fuel in the pipe and send it to the burner, which will increase the fire extinguishing time and cause a foul odor if the fuel or vaporized gas is sent to the burner immediately after extinguishing the fire. .

Therefore, the applicant tried to connect the air pipe communicating with the air passage under the wind pressure of the fan for supplying the combustion air to the oil supply pipe in the Japanese Utility Model Application No. 60-54215 so as to flow into the air pipe during combustion of the burner. A structure is provided to balance the fuel to be used with the wind pressure supplied to the air pipe. Then, when the combustion air supply fan stops due to the fire extinguishing operation, the inside of the air pipe becomes atmospheric pressure, and a part of the fuel in the refueling pipe toward the burner flows into the air pipe, and after the fire extinguishing operation, the fuel enters the end of the refueling pipe. No, I was trying to prevent fuel and vaporized gas from flowing to the burner.

[Problems to be solved by the invention]

By the way, if an air pipe is connected to the refueling pipe, if the tip of the refueling pipe on the burner side is blocked by tar, etc., fuel may be sent to the air pipe and flow out to a place other than the burner. Not only was it dirty, but it could be a fire when touching hot parts, which was extremely dangerous.

[Means for solving problems]

This invention solves the above-mentioned problems, 1 is an oil tank, 2 is a fuel pump attached to the oil tank 1, 3 is a burner, 4 is an oil supply pipe connecting the fuel pump 2 and the burner 3. Reference numeral 5 is a combustion air supply fan, and 6 is an air passage for supplying the air of the combustion air supply fan 5 to the burner 3. The burner 3 supplies fuel from an oil supply pipe 4 and supplies air from the air passage 6 for ignition. The heater 10 ignites and completes combustion in the combustion chamber 11 above the burner 3.

7 is an air passage 6 on the discharge side of the combustion air supply fan 5 and an oil supply pipe 4.
And an air pipe connecting 8 and 8, an oil supply pipe 4 and an air pipe 7.
The oil storage chamber attached to the air pipe 7 near the connection portion with and 9 is a ball valve inserted in the oil storage chamber 8. The ball valve 9 is made of a material lighter than petroleum and has a diameter of the air pipe 7
Larger than the inner diameter of. FIG. 2 shows an embodiment of the structure of the oil storage chamber 8, in which the air pipe 7 is connected to the oil supply pipe 4 by a metal air pipe 7 ', and the end of the metal air pipe 7'has a diameter. The large-diameter portion constitutes the oil storage chamber 8. On the other hand, the air pipe 7 connected to the air passage 6 is formed of a rubber tube, and a large diameter portion is also provided at the end of the rubber air pipe 7 ″, and the large diameter portion of the rubber air pipe 7 ″ and the metal air pipe 7 ′ is formed. By mating with each other, the ball valve 9 is set in the oil storage chamber 8.
Can be inserted.

[Explanation of action]

The fuel pump 2 is energized to send the fuel to the burner 3 via the oil supply pipe 4, while the combustion air supply fan 5 is energized to send the combustion air to the burner 3 via the air passage 6 and the ignition heater.
Ignition combustion is started by 10.

By the way, the wind pressure of the combustion air supply fan 5 is applied to the oil storage chamber 8 by the air pipe 7, and the fuel pressure by the fuel pump 2 is also applied to the oil storage chamber 8, and the fuel pressure in the lower level of the oil storage chamber 8 or in the metal air pipe 7 ' And the air pressure balance is maintained. Therefore, when the fuel pump 2 and the combustion air supply fan 5 are stopped together with the fire extinguishing operation, the connecting portion between the oil supply pipe 4 and the air pipe 7 is located lower than the tip of the burner 3.
The fuel in the oil supply pipe 4 flows into the oil storage chamber 8 at an accretion pressure, and the oil storage chamber 8 balances at the high oil level.

According to the above-mentioned structure, after the fire extinguishing operation, there is no fuel in the oil supply pipe 4 facing the burner 3, so that the burner 3 can be extinguished instantaneously. However, if the burner 3 is burning, the tip of the oil supply pipe 4 is blocked. When a trouble such as a burning occurs, the fuel flows into the oil storage chamber 8 even during combustion. In this invention, the ball valve 9 floating in oil is inserted into the oil storage chamber 8 and the inner diameter of the air pipe 7 is made smaller than the diameter of the ball valve 9.
If the oil level in the oil storage chamber 8 rises, the ball valve 9 also rises, and eventually the ball valve 9 closes the air pipe 7. Therefore, the discharge pressure of the fuel pump 2 is applied to the fuel supply pipe 4, and when tar is attached to the tip of the fuel supply pipe 4 and occludes, if the degree of adhesion is light, the tar is blown off by the discharge pressure of the fuel pump 2. I was able to do it.

[Explanation of effects]

As described above, even if the diameter of the tip of the ordinary oil supply pipe 4 is small, it is not as fine as the spray nozzle,
There is almost no trouble with clogging of the fuel supply pipe 4 due to mixing of dust and the like, and the main cause of blocking the fuel supply pipe 4 is that tar accumulates gradually at the tip of the fuel supply pipe 4 and grows, eventually causing a problem of blocking the tip of the fuel supply pipe 4. Mostly. Since the flow was somewhat poor until the oil supply pipe 4 was blocked, the oil supply pipe 4 could be used without any problems, so that even if the oil supply pipe 4 was closed, no tar was firmly attached.

In this invention, since the oil storage chamber 8 is provided in the air pipe 7, the fuel in the oil supply pipe 4 flows into the oil storage chamber 8 during the fire extinguishing operation, and it is possible to prevent instantaneous burnout of the burner 3 and generation of a bad smell after the fire is extinguished. is there.

Further, since the ball valve 9 is provided in the oil storage chamber 8, the oil supply pipe 4
When the oil is blocked with tar, the discharge pressure of the fuel pump 2 is directly applied to the oil supply pipe 4, and the blocked tar can be blown off. This eliminates the need for overhauling the burner 3 and repairing the failed part when a problem occurs with the blockage of the oil supply pipe 4, and self-cleaning is possible when a problem occurs due to tar. is there.

[Brief description of drawings]

FIG. 1 is a sectional view of this device, and FIG. 2 is a sectional view of the essential part. 1 ... Oil tank, 2 ... Fuel pump, 3 ... Burner, 4
…… Oil supply pipe, 5 …… Combustion air supply fan, 6 …… Air passage,
7 ... Air pipe, 8 ... Oil storage chamber, 9 ... Ball valve

Claims (1)

[Scope of utility model registration request] 1. A fuel pump 2 for pumping fuel from an oil tank 1, and an oil supply pipe 4 connecting the fuel pump 2 and a burner 3.
And a combustion air supply fan 5 for supplying air to the burner 3.
And the air passage 6 on the discharge side of the combustion air supply fan 5 and the oil supply pipe 4
In an oil combustor having an air pipe 7 for connecting with the oil pipe, an oil storage chamber 8 is formed in the air pipe 7 near the connecting portion between the oil supply pipe 4 and the air pipe 7, and A fuel supply device for an oil combustor, characterized in that a ball valve 9 which is lighter and larger than the inner diameter of an air pipe 7 connected to the air passage 6 is inserted.