JPH0590139U - Fuel suction structure of oil combustor - Google Patents

Abstract

(57) [Summary] [Purpose] This is an oil combustor that directly sucks oil from a tank with a pump so that it will not suck up water, foreign fuel, dust, etc. [Structure] A bucket 4 having a small capacity and having an upper edge opening is provided near the bottom of a tank 1 installed at the lower part of an oil combustor, and one end of a fuel pipe 5 that can be connected to a pump 2 is looked into the bucket 4. ing. Therefore, even if water, heterogeneous fuel, dust, etc. accidentally enter the tank 1, it does not reach the upper edge of the bucket 4, and only normal fuel at a position higher than the upper edge opening of the bucket 4 is sucked. Is sent to the burner.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a fuel suction portion of an oil combustor that sucks and supplies fuel with a pump.

[0002]

[Prior Art]

 The fuel supply of the oil combustor is sucked from the lower oil tank by a pump and the fuel is supplied into the burner by pressure spray, or the fuel is pumped into the burner without applying a pressure as strong as pressure spray. In this case, the tip of the fuel pipe that is directly connected to the pump is open near the bottom of the oil tank.

[0003]

[Problems to be solved by the device]

 Oil combustors with an integrated oil tank are portable and are widely used for household and business purposes. By the way, if the storage management of the fuel used in the oil combustor is poor, water, dust, and different types of fuel will accumulate in the oil tank for replenishment, and this dirty fuel will be stored in the oil tank on the oil combustor side. When replenished and used, the pump forcibly pumps water, dust, and different types of fuel and sends them to the burner, causing clogging of the fuel pipe, misfire, and incomplete combustion.

Further, since the oil tank of a commercial oil combustor has a large capacity, the pumping force of the pump is reduced even if the oil level in the oil tank drops to the bottom of the fuel pipe, or below. If it is strong, the oil level rises as shown in Fig. 5 and the state in which the fuel is sucked up with the air continues for a long time, and during this time, the pressure of the pump becomes unstable and it is easy to cause incomplete combustion.

[0005]

[Means for Solving the Problems]

 The present invention proposes the following in order to solve the above problems. That is, in an oil combustor in which fuel is pumped up from the lower oil tank 1 by the pump 2 and supplied to the burner 3, a bucket 4 with a small capacity and an upper edge opening is provided near the bottom of the oil tank 1 and the bucket 4 This is a fuel suction structure of an oil combustor in which one end of a fuel pipe 5 that can be connected to the pump 2 is seen inside.

Further, when the tip of the fuel pipe 5 looking into the bucket 4 is an outward flare portion 5 a, the oil is drained well when the fuel in the bucket 4 drops. is there.

[0007]

[Action]

 When the oil tank 1 is refueled by an appropriate method from a separate replenishment oil tank (not shown), the fuel is replenished in the oil tank 1 and the bucket 4 is filled with fuel when the oil level is above the bucket 4. Then, when the pump 2 is operated, the fuel in the oil tank 1 is sucked through the bucket 4, the fuel pipe 5, and burned by the burner 3.

The increase / decrease in the amount of oil in the oil tank 1 is judged by an oil amount meter, and the fuel is replenished in a timely manner according to the amount used. The fuel pipe 5 sucks the fuel in the bucket 4 when it is reduced to less than the upper edge of the bucket 4 by. (Refer to Fig. 4) At this time, even if the fuel in the oil tank 1 surges into and over the upper edge opening of the bucket 4 and comes in, the fuel in the bucket 4 is used instead of continuous replenishment. It

Eventually, when the fuel is sucked and the oil level in the bucket 4 is gradually lowered, the oil level of the bucket 4 becomes below the lower end of the fuel pipe 5, the oil level rises, and the fuel sucks with the air. It is ready to be raised. (See Figure 5)

Even if the oil level rises and the fuel is sucked up together with the air, the fuel in the bucket 4 is immediately exhausted due to the small shape of the bucket 4. (Refer to FIG. 6) Therefore, the fuel is not sent to the burner 1, and the burner 1 extinguishes the fuel when it runs out of fuel.

[0011]

【Example】

 Next, the structure will be described with reference to the drawings showing an embodiment. 1 is an oil tank for storing fuel, 2 is a pump installed on the upper part of the oil tank 1, and an electromagnetic pump is generally used to apply the sucked fuel. Press. Reference numeral 3 is a burner, 6 is a blower, and the burner 3 receives the fuel sent by the pump 2 and the air sent from the blower 6 and mixes and burns the fuel and the air.

Reference numeral 4 is a small-capacity bucket provided near the bottom of the oil tank 1, 5 is a fuel pipe with one end looking into the bucket 4, and the fuel pipe 5 is connected to the pump 2. By the suction of 2, the fuel having a higher oil level than the upper edge opening of the bucket 4 is sent to the burner 3 through the bucket 4. Therefore, when the oil level in the oil tank 1 decreases to the upper edge of the bucket 4, refueling of the bucket 4 is not performed.

Reference numeral 5a is a flare portion flared so that the lower end of the fuel pipe 5 is expanded outward, and when the oil level in the bucket 4 is lowered, the oil level is reduced by suction of the pump 2 as shown in FIG. Even if it rises, it does not suck up to the fuel pipe 5 and the fuel runs out. This structure is suitable for stopping the suction of the fuel while leaving the fuel in the bucket 4 when a relatively large bucket 4 is used and the time from FIG. 5 to FIG. 6 is long.

Reference numeral 7 denotes a nozzle for spraying the fuel sucked by the pump 2 into the burner 3, and looks into the burner 3 to supply the atomized fuel to the burner 3. Reference numeral 8 denotes an ignition electrode provided near the nozzle 6, which is an example of ignition by spark discharge. Instead of the ignition electrode 8, the burner 3 may be preheated or a heating element having a role of an ignition heater may be used. Reference numeral 9 is a flame spreader located above the burner 3, 10 is a combustion ring located inside the burner 3, and 11 is a lower cylinder attached to the combustion ring 10. Reference numeral 12 is a perforated cylinder standing upright from the bottom of the burner 3, and is composed of a cylinder having a smaller diameter than the lower cylinder 11.

[0015]

[Effect of the Invention] The present invention has the above-described structure and operation. A small capacity bucket 4 is provided in the oil tank 1, and one end of a fuel pipe 5 that can be connected to the pump 2 is provided in the bucket 4. Therefore, even if water, heterogeneous fuel, dust, etc. is mixed into the oil tank 1, these water will stay at the bottom of the oil tank 1 and will not flow into the bucket 4. Only normal fuel is constantly present in the bucket 4 and the combustion is not adversely affected.

Further, when the amount of fuel in the oil tank 1 decreases and the oil level drops to the same level as the upper edge of the bucket 4, refueling into the bucket 4 ceases, so the amount of oil consumed in the bucket 4 decreases. Is quick and the time to extinguish the fire is short, and even if the suction pressure of the pump 2 is strong and the oil level is sucked up to the tip of the fuel pipe 5, the time required for the suction is short, so fuel and air The time to mix and send to the burner 3 is short, and it is difficult for incomplete combustion to occur.

Further, by forming an outward flare portion 5 a at the tip of the fuel pipe 5, when the oil level is lowered to be lower than the tip of the fuel pipe 5 and when the suction force of the pump 2 is strong. However, since the suction of fuel stops instantly when the oil level rises slightly, the burner 3 also extinguishes immediately, and it is a highly practical device that does not continue incomplete combustion for a long time.

[Brief description of drawings]

FIG. 1 is a sectional view of an oil combustor showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of an essential part showing an embodiment of the fuel suction structure of the present invention.

FIG. 3 is a state explanatory view showing a relationship between a fuel pipe and a bucket with respect to a tank oil level, and shows when the tank is full.

FIG. 4 is a state explanatory view showing the relationship between the fuel pipe and the bucket with respect to the tank oil level, showing when the oil level of the bucket is lower than the tank oil level.

FIG. 5 is a state explanatory view showing the relationship between the fuel pipe and the bucket with respect to the tank oil level, and shows when the fuel in the bucket becomes extremely small.

FIG. 6 is a state explanatory view showing the relationship between the fuel pipe and the bucket with respect to the tank oil level, and shows when the fuel in the bucket is exhausted.

FIG. 7 is an enlarged cross-sectional view of main parts showing another embodiment of the fuel suction structure.

[Explanation of symbols]

 1 oil tank 2 pump 3 burner 4 bucket 5 fuel pipe 5a flare part

Claims (2)

[Scope of utility model registration request] 1. An oil combustor for pumping fuel from a lower oil tank 1 with a pump 2 and supplying the fuel to a burner 3,
Bucket 4 with a small capacity near the bottom inside the oil tank 1
And a fuel suction structure for an oil combustor in which one end of a fuel pipe 5 that is connected to the pump 2 is provided in the bucket 4. 2. The fuel suction structure for an oil combustor according to claim 1, wherein the end of the fuel pipe 5 looking into the bucket 4 is an outward flare portion 5a.